/* roulang page: index */
:root {
            --brand-blue: #2F6FED;
            --brand-deep: #3B6FF6;
            --brand-navy: #0D1526;
            --brand-neon: #3EE6FF;
            --brand-orange: #FF9F43;
            --brand-mint: #2EC4B6;
            --brand-light: #F5F9FF;
            --text-dark: #1A2333;
            --text-mid: #4A5568;
            --text-light: #718096;
            --text-white: #FFFFFF;
            --border-light: rgba(47, 111, 237, 0.12);
            --border-soft: #DCE8F5;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --shadow-card: 0 10px 30px rgba(30, 60, 120, 0.08);
            --shadow-card-hover: 0 18px 44px rgba(30, 60, 120, 0.16);
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, 'Inter', 'Roboto', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-dark);
            background-color: var(--brand-light);
            padding-bottom: 120px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        ::selection {
            background: rgba(47, 111, 237, 0.2);
            color: var(--text-dark);
        }

        .container-site {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 520px) {
            .container-site {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* Navigation */
        .site-nav {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--brand-navy);
            border-bottom: 2px solid transparent;
            border-image: linear-gradient(90deg, var(--brand-neon), var(--brand-blue), var(--brand-neon)) 1;
            box-shadow: 0 4px 20px rgba(13, 21, 38, 0.45);
        }

        .site-nav .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: 16px;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            white-space: nowrap;
        }

        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-blue), var(--brand-neon));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            color: white;
            flex-shrink: 0;
            box-shadow: 0 0 12px rgba(62, 230, 255, 0.4);
        }

        .nav-logo .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .nav-logo .logo-text span {
            color: var(--brand-neon);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: nowrap;
        }

        .nav-menu>li {
            position: relative;
            flex-shrink: 0;
        }

        .nav-menu>li>a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 12px;
            font-size: 14px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            border-radius: 8px;
            white-space: nowrap;
            transition: var(--transition-base);
            position: relative;
        }

        .nav-menu>li>a:hover {
            color: #FFFFFF;
            text-shadow: 0 0 8px rgba(62, 230, 255, 0.5);
        }

        .nav-menu>li>a.active {
            color: #FFFFFF;
            text-shadow: 0 0 8px var(--brand-blue);
        }

        .nav-menu>li>a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--brand-neon);
            border-radius: 2px;
            box-shadow: 0 0 8px var(--brand-neon);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--brand-orange);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: 999px;
            white-space: nowrap;
            flex-shrink: 0;
            transition: var(--transition-bounce);
            box-shadow: 0 4px 14px rgba(255, 159, 67, 0.35);
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 159, 67, 0.5);
            color: #fff;
        }

        .nav-dropdown-panel {
            position: absolute;
            top: 100%;
            right: 0;
            min-width: 200px;
            background: #111B2E;
            border-radius: 12px;
            box-shadow: 0 18px 40px rgba(0, 0, 0, 0.4);
            padding: 8px 0;
            opacity: 0;
            visibility: hidden;
            transform: translateY(8px);
            transition: var(--transition-base);
            z-index: 200;
        }

        .nav-dropdown-panel a {
            display: block;
            padding: 10px 18px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
            transition: var(--transition-base);
        }

        .nav-dropdown-panel a:hover {
            background: rgba(47, 111, 237, 0.2);
            color: #fff;
            padding-left: 22px;
        }

        .nav-menu>li:hover .nav-dropdown-panel,
        .nav-menu>li:focus-within .nav-dropdown-panel {
            opacity: 1;
            visibility: visible;
            transform: translateY(4px);
        }

        .nav-burger {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 10px;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: var(--transition-base);
        }

        .nav-burger:hover {
            background: rgba(255, 255, 255, 0.16);
        }

        .nav-burger span {
            display: block;
            width: 20px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition-base);
        }

        .nav-burger.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-burger.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-burger.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .nav-mobile {
            display: none;
            background: var(--brand-navy);
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 12px 0 20px;
        }

        .nav-mobile.open {
            display: block;
        }

        .nav-mobile a {
            display: flex;
            align-items: center;
            padding: 12px 24px;
            font-size: 15px;
            color: rgba(255, 255, 255, 0.85);
            border-left: 3px solid transparent;
            transition: var(--transition-base);
        }

        .nav-mobile a:hover,
        .nav-mobile a.active {
            background: rgba(47, 111, 237, 0.18);
            color: #fff;
            border-left-color: var(--brand-neon);
        }

        @media (max-width: 1024px) {
            .nav-menu {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .nav-burger {
                display: flex;
            }
        }

        /* Hero */
        .hero-site {
            position: relative;
            min-height: 75vh;
            display: flex;
            align-items: center;
            overflow: hidden;
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        .hero-site::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 21, 38, 0.82) 0%, rgba(13, 21, 38, 0.6) 45%, rgba(13, 21, 38, 0.75) 100%);
            z-index: 1;
        }

        .hero-site .hero-content {
            position: relative;
            z-index: 2;
            padding: 80px 0 100px;
            width: 100%;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(62, 230, 255, 0.15);
            border: 1px solid rgba(62, 230, 255, 0.35);
            color: #B8F0FF;
            font-size: 14px;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: 999px;
            margin-bottom: 20px;
            backdrop-filter: blur(10px);
        }

        .hero-badge .dot-pulse {
            width: 8px;
            height: 8px;
            background: var(--brand-neon);
            border-radius: 50%;
            animation: pulse-dot 2s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(62, 230, 255, 0.6);
            }
            50% {
                box-shadow: 0 0 0 8px rgba(62, 230, 255, 0);
            }
        }

        .hero-title {
            font-size: 48px;
            font-weight: 700;
            color: #FFFFFF;
            line-height: 1.25;
            letter-spacing: -0.5px;
            margin-bottom: 20px;
            max-width: 750px;
        }

        .hero-title .highlight {
            color: var(--brand-neon);
            text-shadow: 0 0 20px rgba(62, 230, 255, 0.5);
        }

        .hero-sub {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.8;
            max-width: 620px;
            margin-bottom: 32px;
            font-weight: 400;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: var(--brand-orange);
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            border-radius: 999px;
            transition: var(--transition-bounce);
            box-shadow: 0 6px 22px rgba(255, 159, 67, 0.45);
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 34px rgba(255, 159, 67, 0.6);
            color: #fff;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 28px;
            background: transparent;
            color: #fff;
            font-size: 16px;
            font-weight: 500;
            border-radius: 999px;
            border: 1.5px solid rgba(255, 255, 255, 0.4);
            transition: var(--transition-base);
        }

        .btn-secondary:hover {
            border-color: var(--brand-neon);
            color: var(--brand-neon);
            box-shadow: 0 0 16px rgba(62, 230, 255, 0.25);
        }

        .hero-stats {
            display: flex;
            gap: 28px;
            margin-top: 44px;
            flex-wrap: wrap;
        }

        .hero-stat {
            text-align: left;
        }

        .hero-stat .number {
            font-size: 30px;
            font-weight: 700;
            color: #fff;
            letter-spacing: -0.5px;
            line-height: 1.2;
        }

        .hero-stat .label {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 4px;
        }

        @media (max-width: 768px) {
            .hero-site {
                min-height: 68vh;
            }
            .hero-title {
                font-size: 30px;
            }
            .hero-sub {
                font-size: 15px;
            }
            .hero-stats {
                gap: 16px;
                margin-top: 28px;
            }
            .hero-stat .number {
                font-size: 24px;
            }
        }

        /* Section general */
        .section-site {
            padding: 96px 0;
        }

        @media (max-width: 768px) {
            .section-site {
                padding: 48px 0;
            }
        }

        .section-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            font-weight: 600;
            color: var(--brand-blue);
            text-transform: uppercase;
            letter-spacing: 1.5px;
            margin-bottom: 12px;
        }

        .section-eyebrow .line {
            width: 28px;
            height: 2px;
            background: var(--brand-orange);
            border-radius: 2px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.35;
            margin-bottom: 14px;
            letter-spacing: -0.3px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-mid);
            line-height: 1.8;
            max-width: 680px;
            margin-bottom: 36px;
        }

        /* Cards */
        .card-site {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            transition: var(--transition-base);
            overflow: hidden;
        }

        .card-site:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(47, 111, 237, 0.25);
        }

        .card-cover {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            transition: var(--transition-base);
        }

        .card-site:hover .card-cover {
            transform: scale(1.04);
        }

        .tag-site {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 999px;
            background: rgba(47, 111, 237, 0.1);
            color: var(--brand-blue);
            transition: var(--transition-base);
        }

        .tag-site.tag-orange {
            background: rgba(255, 159, 67, 0.15);
            color: #D97706;
        }
        .tag-site.tag-mint {
            background: rgba(46, 196, 182, 0.15);
            color: #0D9488;
        }
        .tag-site.tag-navy {
            background: rgba(13, 21, 38, 0.08);
            color: #334155;
        }

        /* Feature cards asymmetric */
        .feature-grid-asymmetric {
            display: grid;
            grid-template-columns: 7fr 5fr;
            gap: 24px;
            align-items: stretch;
        }

        .feature-grid-asymmetric .feature-large {
            grid-row: span 2;
        }

        .feature-grid-asymmetric .feature-small {
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        @media (max-width: 1024px) {
            .feature-grid-asymmetric {
                grid-template-columns: 1fr;
            }
            .feature-grid-asymmetric .feature-large {
                grid-row: auto;
            }
        }

        /* FAQ */
        .faq-item {
            border: 1px solid var(--border-light);
            border-radius: 14px;
            background: #fff;
            overflow: hidden;
            transition: var(--transition-base);
            margin-bottom: 12px;
        }

        .faq-item:hover {
            border-color: rgba(47, 111, 237, 0.28);
            box-shadow: 0 4px 16px rgba(30, 60, 120, 0.06);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 20px 24px;
            font-size: 17px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            transition: var(--transition-base);
            user-select: none;
        }

        .faq-question:hover {
            color: var(--brand-blue);
        }

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(47, 111, 237, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-blue);
            font-size: 18px;
            transition: var(--transition-base);
            font-weight: 700;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--brand-blue);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            padding: 0 24px;
            font-size: 15px;
            color: var(--text-mid);
            line-height: 1.8;
            border-left: 3px solid transparent;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 0 24px 20px;
            border-left-color: var(--brand-blue);
        }

        /* Bottom fixed bar */
        .fixed-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 90;
            background: rgba(13, 21, 38, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 2px solid rgba(62, 230, 255, 0.3);
            box-shadow: 0 -8px 30px rgba(13, 21, 38, 0.4);
            padding: 14px 0;
        }

        .fixed-cta-bar .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .fixed-cta-bar .cta-text {
            color: #fff;
            font-size: 15px;
            font-weight: 500;
            line-height: 1.6;
        }

        .fixed-cta-bar .cta-text strong {
            color: var(--brand-neon);
        }

        @media (max-width: 640px) {
            .fixed-cta-bar .cta-inner {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }
            .fixed-cta-bar .cta-text {
                font-size: 13px;
            }
        }

        /* Footer */
        .site-footer {
            background: var(--brand-navy);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 32px;
            border-top: 2px solid transparent;
            border-image: linear-gradient(90deg, var(--brand-neon), var(--brand-blue)) 1;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .site-footer .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .site-footer .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .site-footer .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
        }

        .site-footer .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            padding: 5px 0;
            transition: var(--transition-base);
        }

        .site-footer .footer-col a:hover {
            color: var(--brand-neon);
            padding-left: 6px;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
            display: flex;
            flex-direction: column;
            gap: 8px;
            align-items: center;
            text-align: center;
        }

        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
            text-decoration: underline;
        }

        @media (max-width: 768px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 520px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .site-footer {
                padding: 40px 0 24px;
            }
        }

        /* Review bubbles */
        .review-bubble {
            background: #fff;
            border-radius: 16px;
            padding: 20px 22px;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            transition: var(--transition-base);
            position: relative;
        }

        .review-bubble::before {
            content: '"';
            font-size: 44px;
            font-weight: 700;
            color: rgba(47, 111, 237, 0.15);
            position: absolute;
            top: 8px;
            right: 16px;
            line-height: 1;
            pointer-events: none;
        }

        .review-bubble:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
        }

        .review-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--brand-blue), var(--brand-mint));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
            color: #fff;
            flex-shrink: 0;
        }

        /* Timeline */
        .timeline-item {
            position: relative;
            padding-left: 36px;
            padding-bottom: 28px;
            border-left: 2px solid rgba(47, 111, 237, 0.25);
            margin-left: 12px;
        }

        .timeline-item:last-child {
            border-left-color: transparent;
            padding-bottom: 0;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -7px;
            top: 4px;
            width: 12px;
            height: 12px;
            background: var(--brand-blue);
            border-radius: 50%;
            border: 2px solid #fff;
            box-shadow: 0 0 0 3px rgba(47, 111, 237, 0.2);
        }

        .timeline-item .time-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--brand-orange);
            margin-bottom: 4px;
        }

        .timeline-item .time-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 4px;
        }

        .timeline-item .time-desc {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
        }

        /* Partner chip */
        .partner-chip {
            display: flex;
            align-items: center;
            gap: 10px;
            background: #fff;
            border-radius: 14px;
            padding: 14px 18px;
            border: 1px solid var(--border-light);
            box-shadow: 0 2px 8px rgba(30, 60, 120, 0.04);
            transition: var(--transition-base);
        }

        .partner-chip:hover {
            border-color: rgba(47, 111, 237, 0.3);
            box-shadow: 0 8px 20px rgba(30, 60, 120, 0.08);
            transform: translateY(-2px);
        }

        .partner-chip .partner-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
        }

        .partner-chip .partner-info h5 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-dark);
        }

        .partner-chip .partner-info p {
            font-size: 12px;
            color: var(--text-light);
            margin-top: 2px;
        }

        /* News list */
        .news-list-item {
            display: flex;
            gap: 18px;
            align-items: flex-start;
            padding: 18px 0;
            border-bottom: 1px solid rgba(47, 111, 237, 0.1);
            transition: var(--transition-base);
        }

        .news-list-item:first-child {
            padding-top: 0;
        }

        .news-list-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }

        .news-list-item .news-index {
            font-size: 26px;
            font-weight: 700;
            color: rgba(47, 111, 237, 0.25);
            line-height: 1.2;
            flex-shrink: 0;
            min-width: 48px;
            text-align: center;
        }

        .news-list-item .news-body h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            line-height: 1.5;
            margin-bottom: 6px;
            transition: var(--transition-base);
        }

        .news-list-item .news-body h4:hover {
            color: var(--brand-blue);
        }

        .news-list-item .news-body p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
        }

        .news-list-item .news-meta {
            display: flex;
            gap: 14px;
            font-size: 12px;
            color: var(--text-light);
            margin-top: 6px;
        }

        /* Form */
        .form-input {
            width: 100%;
            padding: 13px 18px;
            border-radius: 12px;
            border: 1.5px solid var(--border-soft);
            background: #fff;
            font-size: 15px;
            color: var(--text-dark);
            outline: none;
            transition: var(--transition-base);
        }

        .form-input:focus {
            border-color: var(--brand-blue);
            box-shadow: 0 0 0 4px rgba(46, 196, 182, 0.15);
        }

        .form-input::placeholder {
            color: #A0AEC0;
        }

        /* misc */
        .divider-gradient {
            height: 3px;
            background: linear-gradient(90deg, var(--brand-neon), var(--brand-blue), var(--brand-orange));
            border-radius: 3px;
            opacity: 0.6;
        }

        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border-width: 0;
        }

        @media (max-width: 640px) {
            .section-title {
                font-size: 24px;
            }
            .section-desc {
                font-size: 14px;
                margin-bottom: 24px;
            }
            .hero-title {
                font-size: 26px;
            }
            .faq-question {
                font-size: 15px;
                padding: 16px 18px;
            }
            .faq-answer {
                font-size: 14px;
                padding: 0 18px;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 16px;
            }
        }

        @media (max-width: 1024px) {
            .hero-title {
                font-size: 36px;
            }
        }

/* roulang page: category1 */
:root {
            --brand-blue: #2F6FED;
            --brand-deep: #3B6FF6;
            --brand-navy: #0D1526;
            --brand-neon: #3EE6FF;
            --brand-orange: #FF9F43;
            --brand-mint: #2EC4B6;
            --brand-light: #F5F9FF;
            --text-dark: #1A2333;
            --text-mid: #4A5568;
            --text-light: #718096;
            --text-white: #FFFFFF;
            --border-light: rgba(47, 111, 237, 0.12);
            --border-soft: #DCE8F5;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --shadow-card: 0 10px 30px rgba(30, 60, 120, 0.08);
            --shadow-card-hover: 0 18px 44px rgba(30, 60, 120, 0.16);
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, 'Inter', 'Roboto', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-dark);
            background-color: var(--brand-light);
            padding-bottom: 140px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }

        a:focus-visible {
            outline: 2px solid var(--brand-neon);
            outline-offset: 2px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container-site {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 640px) {
            .container-site {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* Navigation */
        .site-nav {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--brand-navy);
            border-bottom: 2px solid transparent;
            border-image: linear-gradient(90deg, var(--brand-neon), var(--brand-blue), var(--brand-neon)) 1;
            box-shadow: 0 4px 20px rgba(13, 21, 38, 0.45);
        }

        .site-nav .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: 16px;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            white-space: nowrap;
        }

        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-blue), var(--brand-neon));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            color: white;
            flex-shrink: 0;
            box-shadow: 0 0 12px rgba(62, 230, 255, 0.4);
        }

        .nav-logo .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .nav-logo .logo-text span {
            color: var(--brand-neon);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: nowrap;
            margin: 0;
            padding: 0;
        }

        .nav-menu>li {
            position: relative;
            flex-shrink: 0;
        }

        .nav-menu>li>a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 12px;
            font-size: 14px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            border-radius: 8px;
            white-space: nowrap;
            transition: var(--transition-base);
            position: relative;
        }

        .nav-menu>li>a:hover {
            color: #FFFFFF;
            text-shadow: 0 0 8px rgba(62, 230, 255, 0.5);
        }

        .nav-menu>li>a.active {
            color: #FFFFFF;
            text-shadow: 0 0 8px var(--brand-blue);
        }

        .nav-menu>li>a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--brand-neon);
            border-radius: 2px;
            box-shadow: 0 0 8px var(--brand-neon);
        }

        .dropdown-menu {
            position: absolute;
            top: 100%;
            right: 0;
            min-width: 200px;
            background: #111B2E;
            border-radius: 12px;
            box-shadow: 0 18px 40px rgba(0, 0, 0, 0.4);
            padding: 8px 0;
            opacity: 0;
            visibility: hidden;
            transform: translateY(8px);
            transition: var(--transition-base);
            z-index: 200;
        }

        .nav-menu>li:hover .dropdown-menu,
        .nav-menu>li:focus-within .dropdown-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .dropdown-menu a {
            display: block;
            padding: 10px 18px;
            color: rgba(255, 255, 255, 0.75);
            font-size: 14px;
            white-space: nowrap;
        }

        .dropdown-menu a:hover {
            color: #fff;
            background: rgba(62, 230, 255, 0.1);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--brand-orange);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: 999px;
            white-space: nowrap;
            flex-shrink: 0;
            transition: var(--transition-bounce);
            box-shadow: 0 4px 14px rgba(255, 159, 67, 0.35);
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 159, 67, 0.5);
            color: #fff;
        }

        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.06);
            flex-shrink: 0;
        }

        .hamburger span {
            width: 24px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition-base);
        }

        @media (max-width: 1024px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--brand-navy);
                flex-direction: column;
                align-items: stretch;
                padding: 12px 16px;
                gap: 2px;
                border-bottom: 2px solid var(--brand-neon);
                box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5);
                z-index: 300;
            }

            .nav-menu.nav-open {
                display: flex;
            }

            .nav-menu>li {
                width: 100%;
            }

            .nav-menu>li>a {
                padding: 14px 16px;
                font-size: 15px;
                border-radius: 10px;
            }

            .nav-menu>li>a.active::after {
                display: none;
            }

            .hamburger {
                display: flex;
            }

            .nav-cta {
                display: none;
            }

            .dropdown-menu {
                position: static;
                min-width: auto;
                background: rgba(255, 255, 255, 0.04);
                border-radius: 10px;
                padding: 4px 0;
                opacity: 1;
                visibility: visible;
                transform: none;
                box-shadow: none;
                margin-top: 4px;
            }

            .dropdown-menu a {
                padding: 10px 24px;
            }
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.7);
            padding: 16px 0;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
        }

        .breadcrumb a:hover {
            color: #fff;
        }

        .breadcrumb .separator {
            color: var(--brand-neon);
        }

        .breadcrumb .current {
            color: #fff;
            font-weight: 600;
        }

        /* Category Hero */
        .category-hero {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            min-height: 380px;
            display: flex;
            align-items: center;
            border-radius: 0 0 28px 28px;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 21, 38, 0.85) 0%, rgba(47, 111, 237, 0.75) 100%);
        }

        .category-hero .hero-content {
            position: relative;
            z-index: 2;
            padding: 56px 0;
            width: 100%;
        }

        .category-hero .hero-title {
            font-size: 42px;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .category-hero .hero-desc {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 640px;
            line-height: 1.8;
        }

        .category-hero .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(62, 230, 255, 0.18);
            border: 1px solid rgba(62, 230, 255, 0.4);
            color: var(--brand-neon);
            font-size: 13px;
            border-radius: 999px;
            margin-bottom: 16px;
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .category-hero {
                min-height: 300px;
            }

            .category-hero .hero-title {
                font-size: 28px;
            }

            .category-hero .hero-desc {
                font-size: 15px;
            }
        }

        /* Section */
        .section {
            padding: 80px 0;
        }

        .section-light {
            background: #FFFFFF;
        }

        .section-title {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 12px;
            line-height: 1.35;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-mid);
            max-width: 680px;
            line-height: 1.8;
            margin-bottom: 40px;
        }

        @media (max-width: 768px) {
            .section {
                padding: 48px 0;
            }

            .section-title {
                font-size: 24px;
            }
        }

        /* Cards */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            display: flex;
            flex-direction: column;
        }

        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(47, 111, 237, 0.25);
        }

        .card .card-image {
            aspect-ratio: 16/10;
            overflow: hidden;
            position: relative;
        }

        .card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .card:hover .card-image img {
            transform: scale(1.04);
        }

        .card .card-badge {
            position: absolute;
            top: 14px;
            left: 14px;
            padding: 4px 12px;
            background: var(--brand-blue);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            border-radius: 999px;
            z-index: 2;
        }

        .card .card-body {
            padding: 20px 22px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .card .card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 8px;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card .card-summary {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }

        .card .card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-top: auto;
            padding-top: 12px;
            border-top: 1px solid var(--border-soft);
            font-size: 13px;
            color: var(--text-light);
        }

        @media (max-width: 1024px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 640px) {
            .card-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
        }

        /* Data Stats */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .stat-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
        }

        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
        }

        .stat-number {
            font-size: 36px;
            font-weight: 700;
            color: var(--brand-blue);
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-mid);
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }

            .stat-number {
                font-size: 28px;
            }
        }

        /* Timeline */
        .timeline {
            position: relative;
            padding-left: 32px;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 8px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: linear-gradient(180deg, var(--brand-blue), var(--brand-mint));
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            padding-bottom: 28px;
            padding-left: 20px;
        }

        .timeline-item:last-child {
            padding-bottom: 0;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -30px;
            top: 6px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--brand-blue);
            border: 3px solid #fff;
            box-shadow: 0 0 0 3px rgba(47, 111, 237, 0.25);
        }

        .timeline-item .timeline-year {
            font-size: 14px;
            font-weight: 700;
            color: var(--brand-blue);
            margin-bottom: 4px;
        }

        .timeline-item .timeline-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 6px;
        }

        .timeline-item .timeline-desc {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
        }

        /* Tags */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag {
            display: inline-block;
            padding: 8px 18px;
            font-size: 13px;
            font-weight: 500;
            border-radius: 999px;
            background: #FFFFFF;
            border: 1px solid var(--border-soft);
            color: var(--text-mid);
            transition: var(--transition-base);
            cursor: pointer;
        }

        .tag:hover {
            background: var(--brand-light);
            border-color: var(--brand-blue);
            color: var(--brand-blue);
        }

        .tag.tag-active {
            background: var(--brand-blue);
            color: #fff;
            border-color: var(--brand-blue);
        }

        /* Partner tags */
        .partner-tags {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .partner-tag {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 20px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            text-align: center;
            transition: var(--transition-base);
        }

        .partner-tag:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
        }

        .partner-tag .tag-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 6px;
        }

        .partner-tag .tag-desc {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .partner-tags {
                grid-template-columns: 1fr;
            }
        }

        /* Review */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .review-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            padding: 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
        }

        .review-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
        }

        .review-card .review-text {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.75;
            margin-bottom: 14px;
        }

        .review-card .review-author {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-dark);
        }

        .review-card .review-role {
            font-size: 12px;
            color: var(--text-light);
        }

        @media (max-width: 768px) {
            .review-grid {
                grid-template-columns: 1fr;
            }
        }

        /* FAQ */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }

        .faq-item {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-item:hover {
            border-color: rgba(47, 111, 237, 0.3);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            gap: 12px;
            user-select: none;
            transition: var(--transition-base);
        }

        .faq-question:hover {
            color: var(--brand-blue);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--brand-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--brand-blue);
            transition: var(--transition-base);
        }

        .faq-item.faq-open .faq-icon {
            background: var(--brand-blue);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            border-left: 3px solid transparent;
        }

        .faq-item.faq-open .faq-answer {
            max-height: 400px;
            border-left-color: var(--brand-blue);
        }

        .faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 15px;
            color: var(--text-mid);
            line-height: 1.8;
        }

        /* Bottom CTA Bar */
        .bottom-cta {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 90;
            background: rgba(13, 21, 38, 0.95);
            backdrop-filter: blur(12px);
            border-top: 2px solid rgba(62, 230, 255, 0.4);
            padding: 14px 20px;
            box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.3);
        }

        .bottom-cta .cta-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }

        .bottom-cta .cta-text {
            color: #fff;
            font-size: 15px;
            font-weight: 500;
            flex: 1;
            min-width: 200px;
        }

        .bottom-cta .cta-text span {
            color: var(--brand-neon);
            font-weight: 600;
        }

        .bottom-cta .cta-buttons {
            display: flex;
            gap: 12px;
            flex-shrink: 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            font-size: 14px;
            font-weight: 600;
            border-radius: 999px;
            transition: var(--transition-bounce);
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--brand-orange);
            color: #fff;
            box-shadow: 0 4px 14px rgba(255, 159, 67, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 159, 67, 0.5);
            color: #fff;
        }

        .btn-outline {
            border: 1px solid rgba(255, 255, 255, 0.4);
            color: #fff;
            background: transparent;
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
        }

        @media (max-width: 640px) {
            .bottom-cta .cta-inner {
                flex-direction: column;
                text-align: center;
                gap: 10px;
            }

            .bottom-cta .cta-buttons {
                width: 100%;
                justify-content: center;
            }
        }

        /* Footer */
        .site-footer {
            background: var(--brand-navy);
            padding: 60px 0 30px;
            color: rgba(255, 255, 255, 0.7);
            border-top: 2px solid var(--brand-neon);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-logo .logo-badge {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-blue), var(--brand-neon));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: #fff;
            font-size: 16px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 10px;
            transition: var(--transition-base);
        }

        .footer-col a:hover {
            color: var(--brand-neon);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
            justify-content: center;
            text-align: center;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom a:hover {
            color: var(--brand-neon);
        }

        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 540px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

/* roulang page: category2 */
:root {
            --brand-blue: #2F6FED;
            --brand-deep: #3B6FF6;
            --brand-navy: #0D1526;
            --brand-neon: #3EE6FF;
            --brand-orange: #FF9F43;
            --brand-mint: #2EC4B6;
            --brand-light: #F5F9FF;
            --text-dark: #1A2333;
            --text-mid: #4A5568;
            --text-light: #718096;
            --text-white: #FFFFFF;
            --border-light: rgba(47, 111, 237, 0.12);
            --border-soft: #DCE8F5;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --shadow-card: 0 10px 30px rgba(30, 60, 120, 0.08);
            --shadow-card-hover: 0 18px 44px rgba(30, 60, 120, 0.16);
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, 'Inter', 'Roboto', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-dark);
            background-color: var(--brand-light);
            padding-bottom: 120px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container-site {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 640px) {
            .container-site {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* Navigation */
        .site-nav {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--brand-navy);
            border-bottom: 2px solid transparent;
            border-image: linear-gradient(90deg, var(--brand-neon), var(--brand-blue), var(--brand-neon)) 1;
            box-shadow: 0 4px 20px rgba(13, 21, 38, 0.45);
        }

        .site-nav .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: 16px;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            white-space: nowrap;
        }

        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-blue), var(--brand-neon));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            color: white;
            flex-shrink: 0;
            box-shadow: 0 0 12px rgba(62, 230, 255, 0.4);
        }

        .nav-logo .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .nav-logo .logo-text span {
            color: var(--brand-neon);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: nowrap;
            margin: 0;
            padding: 0;
        }

        .nav-menu>li {
            position: relative;
            flex-shrink: 0;
        }

        .nav-menu>li>a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 12px;
            font-size: 14px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            border-radius: 8px;
            white-space: nowrap;
            transition: var(--transition-base);
            position: relative;
        }

        .nav-menu>li>a:hover {
            color: #FFFFFF;
            text-shadow: 0 0 8px rgba(62, 230, 255, 0.5);
        }

        .nav-menu>li>a.active {
            color: #FFFFFF;
            text-shadow: 0 0 8px var(--brand-blue);
        }

        .nav-menu>li>a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--brand-neon);
            border-radius: 2px;
            box-shadow: 0 0 8px var(--brand-neon);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--brand-orange);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: 999px;
            white-space: nowrap;
            flex-shrink: 0;
            transition: var(--transition-bounce);
            box-shadow: 0 4px 14px rgba(255, 159, 67, 0.35);
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 159, 67, 0.5);
            color: #fff;
        }

        .dropdown-menu {
            position: absolute;
            top: 100%;
            right: 0;
            min-width: 200px;
            background: #111B2E;
            border-radius: 12px;
            box-shadow: 0 18px 40px rgba(0, 0, 0, 0.4);
            padding: 8px 0;
            opacity: 0;
            visibility: hidden;
            transform: translateY(8px);
            transition: var(--transition-base);
            z-index: 200;
        }

        .nav-menu>li:hover .dropdown-menu,
        .nav-menu>li:focus-within .dropdown-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .dropdown-menu a {
            display: block;
            padding: 10px 18px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            transition: var(--transition-base);
        }

        .dropdown-menu a:hover {
            color: #FFFFFF;
            background: rgba(62, 230, 255, 0.08);
            text-shadow: 0 0 8px rgba(62, 230, 255, 0.4);
        }

        .mobile-menu-btn {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: none;
            border: none;
            cursor: pointer;
            z-index: 110;
        }

        .mobile-menu-btn span {
            display: block;
            width: 24px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition-base);
        }

        .mobile-menu-btn.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .mobile-menu-btn.open span:nth-child(2) {
            opacity: 0;
        }
        .mobile-menu-btn.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: var(--brand-orange);
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            border-radius: 999px;
            transition: var(--transition-bounce);
            box-shadow: 0 4px 14px rgba(255, 159, 67, 0.35);
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 28px rgba(255, 159, 67, 0.5);
            color: #fff;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: transparent;
            color: var(--brand-blue);
            font-size: 16px;
            font-weight: 600;
            border-radius: 999px;
            border: 2px solid var(--brand-blue);
            transition: var(--transition-base);
            cursor: pointer;
        }

        .btn-secondary:hover {
            background: rgba(47, 111, 237, 0.08);
            transform: translateY(-3px);
        }

        /* Cards */
        .service-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            transition: var(--transition-bounce);
            overflow: hidden;
        }

        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(47, 111, 237, 0.25);
        }

        .content-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            transition: var(--transition-bounce);
            overflow: hidden;
        }

        .content-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(47, 111, 237, 0.25);
        }

        .content-card .card-img {
            overflow: hidden;
            aspect-ratio: 16 / 9;
        }

        .content-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .content-card:hover .card-img img {
            transform: scale(1.05);
        }

        .tag {
            display: inline-block;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 600;
            border-radius: 999px;
            background: rgba(46, 196, 182, 0.12);
            color: #0F9B8E;
            letter-spacing: 0.3px;
        }

        .tag-orange {
            background: rgba(255, 159, 67, 0.12);
            color: #E07C1F;
        }

        .tag-blue {
            background: rgba(47, 111, 237, 0.1);
            color: var(--brand-blue);
        }

        /* FAQ */
        .faq-item {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-item.active {
            border-left: 3px solid var(--brand-blue);
            box-shadow: 0 6px 18px rgba(30, 60, 120, 0.08);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 24px;
            font-size: 18px;
            font-weight: 700;
            color: var(--text-dark);
            text-align: left;
            background: none;
            border: none;
            cursor: pointer;
            transition: var(--transition-base);
        }

        .faq-question:hover {
            color: var(--brand-blue);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(47, 111, 237, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--brand-blue);
            transition: var(--transition-base);
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--brand-blue);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-mid);
            line-height: 1.8;
        }

        /* Footer */
        .site-footer {
            background: var(--brand-navy);
            color: rgba(255, 255, 255, 0.75);
            padding: 56px 0 32px;
            margin-top: 80px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
        }

        .footer-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-blue), var(--brand-neon));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
            color: white;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #FFFFFF;
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 10px;
            transition: var(--transition-base);
        }

        .footer-col a:hover {
            color: var(--brand-neon);
            transform: translateX(3px);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
            justify-content: space-between;
            align-items: center;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition-base);
        }

        .footer-bottom a:hover {
            color: var(--brand-neon);
        }

        /* Fixed CTA bar */
        .fixed-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 90;
            background: rgba(13, 21, 38, 0.95);
            backdrop-filter: blur(12px);
            border-top: 1px solid rgba(62, 230, 255, 0.25);
            padding: 12px 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .fixed-cta-bar p {
            color: rgba(255, 255, 255, 0.85);
            font-size: 14px;
            margin: 0;
            white-space: nowrap;
        }

        .fixed-cta-bar .cta-bar-btn {
            padding: 10px 24px;
            background: var(--brand-orange);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: 999px;
            transition: var(--transition-bounce);
            box-shadow: 0 4px 16px rgba(255, 159, 67, 0.4);
            white-space: nowrap;
        }

        .fixed-cta-bar .cta-bar-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 159, 67, 0.55);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .nav-menu {
                gap: 0;
            }
            .nav-menu>li>a {
                padding: 10px 8px;
                font-size: 13px;
            }
            .nav-cta {
                padding: 8px 14px;
                font-size: 13px;
            }
        }

        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: flex;
            }
            .nav-menu {
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                flex-direction: column;
                align-items: stretch;
                background: var(--brand-navy);
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 2px solid rgba(62, 230, 255, 0.3);
                display: none;
                max-height: calc(100vh - 68px);
                overflow-y: auto;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu>li {
                width: 100%;
            }
            .nav-menu>li>a {
                padding: 14px 12px;
                font-size: 15px;
                width: 100%;
                border-radius: 8px;
            }
            .nav-menu>li>a.active::after {
                bottom: 2px;
                left: 12px;
                transform: none;
                width: 32px;
            }
            .nav-cta {
                display: none;
            }
            .dropdown-menu {
                position: static;
                opacity: 1;
                visibility: visible;
                transform: none;
                box-shadow: none;
                background: rgba(255, 255, 255, 0.04);
                border-radius: 8px;
                margin: 4px 0 4px 12px;
                padding: 4px 0;
                min-width: auto;
                display: none;
            }
            .dropdown-menu.open {
                display: block;
            }
            .nav-menu>li:hover .dropdown-menu,
            .nav-menu>li:focus-within .dropdown-menu {
                display: none;
            }
            .nav-menu>li.dropdown-open .dropdown-menu {
                display: block;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .fixed-cta-bar {
                flex-direction: column;
                gap: 8px;
                padding: 10px 12px;
            }
            .fixed-cta-bar p {
                font-size: 13px;
                white-space: normal;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            body {
                font-size: 15px;
                padding-bottom: 140px;
            }
            .site-nav .nav-inner {
                min-height: 60px;
            }
            .nav-logo .logo-text {
                font-size: 16px;
            }
            .nav-logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
            .nav-menu {
                top: 60px;
            }
            .btn-primary,
            .btn-secondary {
                padding: 12px 24px;
                font-size: 14px;
            }
            .faq-question {
                font-size: 16px;
                padding: 14px 16px;
            }
            .faq-answer-inner {
                padding: 0 16px 16px;
                font-size: 14px;
            }
        }

/* roulang page: category4 */
:root {
            --brand-blue: #2F6FED;
            --brand-deep: #3B6FF6;
            --brand-navy: #0D1526;
            --brand-neon: #3EE6FF;
            --brand-orange: #FF9F43;
            --brand-mint: #2EC4B6;
            --brand-light: #F5F9FF;
            --text-dark: #1A2333;
            --text-mid: #4A5568;
            --text-light: #718096;
            --text-white: #FFFFFF;
            --border-light: rgba(47, 111, 237, 0.12);
            --border-soft: #DCE8F5;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --shadow-card: 0 10px 30px rgba(30, 60, 120, 0.08);
            --shadow-card-hover: 0 18px 44px rgba(30, 60, 120, 0.16);
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, 'Inter', 'Roboto', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-dark);
            background-color: var(--brand-light);
            padding-bottom: 120px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container-site {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 640px) {
            .container-site {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* Navigation */
        .site-nav {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--brand-navy);
            border-bottom: 2px solid transparent;
            border-image: linear-gradient(90deg, var(--brand-neon), var(--brand-blue), var(--brand-neon)) 1;
            box-shadow: 0 4px 20px rgba(13, 21, 38, 0.45);
        }

        .site-nav .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: 16px;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            white-space: nowrap;
        }

        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-blue), var(--brand-neon));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            color: #fff;
            flex-shrink: 0;
            box-shadow: 0 0 12px rgba(62, 230, 255, 0.4);
        }

        .nav-logo .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .nav-logo .logo-text span {
            color: var(--brand-neon);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: nowrap;
        }

        .nav-menu>li {
            position: relative;
            flex-shrink: 0;
        }

        .nav-menu>li>a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 12px;
            font-size: 14px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            border-radius: 8px;
            white-space: nowrap;
            transition: var(--transition-base);
            position: relative;
        }

        .nav-menu>li>a:hover {
            color: #FFFFFF;
            text-shadow: 0 0 8px rgba(62, 230, 255, 0.5);
        }

        .nav-menu>li>a.active {
            color: #FFFFFF;
            text-shadow: 0 0 8px var(--brand-blue);
        }

        .nav-menu>li>a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--brand-neon);
            border-radius: 2px;
            box-shadow: 0 0 8px var(--brand-neon);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--brand-orange);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: 999px;
            white-space: nowrap;
            flex-shrink: 0;
            transition: var(--transition-bounce);
            box-shadow: 0 4px 14px rgba(255, 159, 67, 0.35);
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 159, 67, 0.5);
            color: #fff;
        }

        .dropdown-menu {
            position: absolute;
            top: 100%;
            right: 0;
            min-width: 200px;
            background: #111B2E;
            border-radius: 12px;
            box-shadow: 0 18px 40px rgba(0, 0, 0, 0.4);
            padding: 8px 0;
            opacity: 0;
            visibility: hidden;
            transform: translateY(8px);
            transition: var(--transition-base);
            z-index: 200;
        }

        .nav-menu>li:hover .dropdown-menu,
        .nav-menu>li:focus-within .dropdown-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .dropdown-menu a {
            display: block;
            padding: 10px 18px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            transition: var(--transition-base);
        }

        .dropdown-menu a:hover {
            color: #fff;
            background: rgba(47, 111, 237, 0.15);
            text-shadow: 0 0 6px rgba(62, 230, 255, 0.4);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            flex-shrink: 0;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition-base);
        }

        @media (max-width: 1024px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: var(--brand-navy);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 20px;
                gap: 6px;
                border-top: 1px solid rgba(255, 255, 255, 0.06);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
                z-index: 150;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu>li>a {
                padding: 12px 16px;
                border-radius: 10px;
                font-size: 15px;
            }
            .nav-cta {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .dropdown-menu {
                position: static;
                min-width: auto;
                background: transparent;
                box-shadow: none;
                padding: 4px 0 4px 16px;
                opacity: 1;
                visibility: visible;
                transform: none;
                display: none;
            }
            .nav-menu>li:hover .dropdown-menu,
            .nav-menu>li:focus-within .dropdown-menu {
                display: block;
            }
        }

        @media (max-width: 640px) {
            .nav-logo .logo-text {
                font-size: 16px;
            }
            .nav-logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
            .site-nav .nav-inner {
                min-height: 60px;
            }
            .nav-menu {
                top: 60px;
            }
        }

        /* Hero / Banner */
        .page-hero {
            background-image: linear-gradient(135deg, rgba(13, 21, 38, 0.82) 0%, rgba(13, 21, 38, 0.65) 100%), url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            min-height: 380px;
            display: flex;
            align-items: center;
            padding: 80px 0 60px;
            position: relative;
        }

        @media (max-width: 640px) {
            .page-hero {
                min-height: 280px;
                padding: 48px 0 40px;
            }
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 18px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--brand-blue);
            font-weight: 500;
            transition: var(--transition-base);
        }
        .breadcrumb a:hover {
            color: var(--brand-deep);
            text-shadow: 0 0 6px rgba(47, 111, 237, 0.3);
        }
        .breadcrumb .sep {
            color: var(--text-light);
            opacity: 0.6;
        }
        .breadcrumb .current {
            color: var(--text-mid);
            font-weight: 500;
        }
        .page-hero .breadcrumb a {
            color: rgba(255, 255, 255, 0.7);
        }
        .page-hero .breadcrumb a:hover {
            color: var(--brand-neon);
        }
        .page-hero .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.4);
        }
        .page-hero .breadcrumb .current {
            color: #fff;
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: linear-gradient(135deg, var(--brand-blue), var(--brand-deep));
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            border-radius: 999px;
            white-space: nowrap;
            transition: var(--transition-bounce);
            box-shadow: 0 8px 24px rgba(47, 111, 237, 0.35);
            border: none;
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 14px 36px rgba(47, 111, 237, 0.5);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(-1px);
            box-shadow: 0 6px 18px rgba(47, 111, 237, 0.35);
        }
        .btn-primary:focus-visible {
            outline: 3px solid rgba(62, 230, 255, 0.6);
            outline-offset: 2px;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 30px;
            background: transparent;
            color: var(--brand-blue);
            font-size: 15px;
            font-weight: 600;
            border-radius: 999px;
            white-space: nowrap;
            border: 2px solid var(--brand-blue);
            transition: var(--transition-base);
        }
        .btn-secondary:hover {
            background: rgba(47, 111, 237, 0.08);
            color: var(--brand-deep);
            border-color: var(--brand-deep);
        }
        .btn-secondary:active {
            transform: scale(0.98);
        }
        .btn-secondary:focus-visible {
            outline: 3px solid rgba(47, 111, 237, 0.4);
            outline-offset: 2px;
        }

        .btn-orange {
            background: linear-gradient(135deg, var(--brand-orange), #FFB067);
            color: #fff;
            box-shadow: 0 8px 24px rgba(255, 159, 67, 0.35);
        }
        .btn-orange:hover {
            box-shadow: 0 14px 36px rgba(255, 159, 67, 0.5);
        }

        /* Cards */
        .service-card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            transition: var(--transition-base);
            overflow: hidden;
        }
        .service-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(47, 111, 237, 0.3);
        }
        .service-card .card-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/9;
        }
        .service-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .service-card:hover .card-img-wrap img {
            transform: scale(1.05);
        }
        .service-card .card-body {
            padding: 20px 22px;
        }
        .service-card .card-tag {
            display: inline-block;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 600;
            border-radius: 999px;
            background: rgba(47, 111, 237, 0.08);
            color: var(--brand-blue);
            margin-bottom: 10px;
            letter-spacing: 0.3px;
        }
        .service-card .card-tag.mint {
            background: rgba(46, 196, 182, 0.1);
            color: #1AA99C;
        }
        .service-card .card-tag.orange {
            background: rgba(255, 159, 67, 0.12);
            color: #E8862B;
        }
        .service-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .service-card p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* Feature blocks */
        .feature-block {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            padding: 28px;
            transition: var(--transition-base);
        }
        .feature-block:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
        }
        .feature-block .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin-bottom: 16px;
            flex-shrink: 0;
        }
        .feature-block .feature-icon.blue {
            background: rgba(47, 111, 237, 0.1);
            color: var(--brand-blue);
        }
        .feature-block .feature-icon.mint {
            background: rgba(46, 196, 182, 0.1);
            color: #1AA99C;
        }
        .feature-block .feature-icon.orange {
            background: rgba(255, 159, 67, 0.12);
            color: #E8862B;
        }
        .feature-block h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-dark);
        }
        .feature-block p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
        }

        /* Step / process */
        .step-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--brand-blue), var(--brand-deep));
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            box-shadow: 0 4px 12px rgba(47, 111, 237, 0.3);
        }
        .step-item h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 4px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
        }

        /* Review cards */
        .review-card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            padding: 22px;
            transition: var(--transition-base);
            height: 100%;
        }
        .review-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
        }
        .review-card .review-stars {
            color: var(--brand-orange);
            font-size: 14px;
            margin-bottom: 8px;
            letter-spacing: 2px;
        }
        .review-card p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.75;
        }
        .review-card .review-author {
            margin-top: 12px;
            font-size: 13px;
            color: var(--text-light);
            font-weight: 500;
        }

        /* FAQ */
        .faq-item {
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }
        .faq-item:hover {
            border-color: rgba(47, 111, 237, 0.25);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            width: 100%;
            text-align: left;
            background: none;
            border: none;
            transition: var(--transition-base);
            cursor: pointer;
        }
        .faq-question:hover {
            color: var(--brand-blue);
        }
        .faq-question .faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(47, 111, 237, 0.08);
            color: var(--brand-blue);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
            transition: var(--transition-base);
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
            background: rgba(47, 111, 237, 0.2);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            padding: 0 22px;
            border-left: 3px solid transparent;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
            border-left-color: var(--brand-blue);
        }
        .faq-answer p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.75;
        }

        /* CTA bottom */
        .cta-bottom-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 90;
            background: rgba(13, 21, 38, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid rgba(62, 230, 255, 0.25);
            padding: 12px 20px;
            box-shadow: 0 -8px 32px rgba(13, 21, 38, 0.4);
        }
        .cta-bottom-bar .cta-inner {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }
        .cta-bottom-bar .cta-text {
            color: #fff;
            font-size: 14px;
            font-weight: 500;
            flex: 1;
            min-width: 200px;
        }
        .cta-bottom-bar .cta-text strong {
            color: var(--brand-neon);
            font-weight: 700;
        }

        /* Footer */
        .site-footer {
            background: var(--brand-navy);
            color: rgba(255, 255, 255, 0.7);
            margin-top: 80px;
            padding: 56px 0 0;
            border-top: 2px solid transparent;
            border-image: linear-gradient(90deg, var(--brand-neon), var(--brand-blue), var(--brand-neon)) 1;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 36px;
        }
        @media (max-width: 900px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 560px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }
        .site-footer .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            white-space: nowrap;
        }
        .site-footer .footer-desc {
            font-size: 14px;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.6);
            max-width: 320px;
        }
        .site-footer .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }
        .site-footer .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            padding: 6px 0;
            transition: var(--transition-base);
        }
        .site-footer .footer-col a:hover {
            color: var(--brand-neon);
            text-shadow: 0 0 6px rgba(62, 230, 255, 0.4);
            padding-left: 4px;
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 18px 0 20px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
            display: flex;
            flex-wrap: wrap;
            gap: 6px 20px;
            align-items: center;
        }
        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.55);
            transition: var(--transition-base);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--brand-neon);
        }

        /* Section headings */
        .section-heading {
            margin-bottom: 32px;
        }
        .section-heading .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--brand-blue);
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .section-heading h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.35;
            margin-bottom: 10px;
        }
        .section-heading p {
            font-size: 16px;
            color: var(--text-mid);
            line-height: 1.75;
            max-width: 680px;
        }
        @media (max-width: 640px) {
            .section-heading h2 {
                font-size: 22px;
            }
            .section-heading p {
                font-size: 14px;
            }
        }

        .page-hero h1.page-title {
            font-size: 40px;
            font-weight: 700;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }
        .page-hero .page-subtitle {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.75;
            max-width: 680px;
        }
        @media (max-width: 640px) {
            .page-hero h1.page-title {
                font-size: 26px;
            }
            .page-hero .page-subtitle {
                font-size: 15px;
            }
        }

        /* Mixed list */
        .mixed-item {
            display: flex;
            gap: 20px;
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition-base);
            margin-bottom: 16px;
        }
        .mixed-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
        }
        .mixed-item .mixed-img {
            width: 200px;
            flex-shrink: 0;
            aspect-ratio: 4/3;
            overflow: hidden;
        }
        .mixed-item .mixed-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }
        .mixed-item:hover .mixed-img img {
            transform: scale(1.05);
        }
        .mixed-item .mixed-body {
            padding: 18px 20px;
            flex: 1;
        }
        .mixed-item .mixed-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 6px;
        }
        .mixed-item .mixed-body p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        @media (max-width: 560px) {
            .mixed-item {
                flex-direction: column;
            }
            .mixed-item .mixed-img {
                width: 100%;
                aspect-ratio: 16/9;
            }
        }

        /* Pagination */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 32px;
            flex-wrap: wrap;
        }
        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 12px;
            font-size: 14px;
            font-weight: 500;
            border-radius: 10px;
            transition: var(--transition-base);
            border: 1px solid var(--border-soft);
            color: var(--text-mid);
            background: #fff;
        }
        .pagination a:hover {
            border-color: var(--brand-blue);
            color: var(--brand-blue);
        }
        .pagination .page-current {
            background: var(--brand-blue);
            color: #fff;
            border-color: var(--brand-blue);
            font-weight: 700;
        }

        /* Tags */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag-cloud .tag-item {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            font-size: 13px;
            font-weight: 500;
            border-radius: 999px;
            background: #fff;
            color: var(--text-mid);
            border: 1px solid var(--border-soft);
            transition: var(--transition-base);
        }
        .tag-cloud .tag-item:hover {
            border-color: var(--brand-blue);
            color: var(--brand-blue);
            background: rgba(47, 111, 237, 0.04);
        }

        /* Focus visible */
        :focus-visible {
            outline: 3px solid rgba(47, 111, 237, 0.5);
            outline-offset: 2px;
        }

/* roulang page: category3 */
:root {
            --brand-blue: #2F6FED;
            --brand-deep: #3B6FF6;
            --brand-navy: #0D1526;
            --brand-neon: #3EE6FF;
            --brand-orange: #FF9F43;
            --brand-mint: #2EC4B6;
            --brand-light: #F5F9FF;
            --text-dark: #1A2333;
            --text-mid: #4A5568;
            --text-light: #718096;
            --text-white: #FFFFFF;
            --border-light: rgba(47, 111, 237, 0.12);
            --border-soft: #DCE8F5;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --shadow-card: 0 10px 30px rgba(30, 60, 120, 0.08);
            --shadow-card-hover: 0 18px 44px rgba(30, 60, 120, 0.16);
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            overflow-x: hidden;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, 'Inter', 'Roboto', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-dark);
            background-color: var(--brand-light);
            padding-bottom: 120px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container-site {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 640px) {
            .container-site {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* Navigation */
        .site-nav {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--brand-navy);
            border-bottom: 2px solid transparent;
            border-image: linear-gradient(90deg, var(--brand-neon), var(--brand-blue), var(--brand-neon)) 1;
            box-shadow: 0 4px 20px rgba(13, 21, 38, 0.45);
        }

        .site-nav .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: 16px;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            white-space: nowrap;
        }

        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-blue), var(--brand-neon));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            color: white;
            flex-shrink: 0;
            box-shadow: 0 0 12px rgba(62, 230, 255, 0.4);
        }

        .nav-logo .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .nav-logo .logo-text span {
            color: var(--brand-neon);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: nowrap;
            margin: 0;
            padding: 0;
        }

        .nav-menu>li {
            position: relative;
            flex-shrink: 0;
        }

        .nav-menu>li>a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 12px;
            font-size: 14px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            border-radius: 8px;
            white-space: nowrap;
            transition: var(--transition-base);
            position: relative;
        }

        .nav-menu>li>a:hover {
            color: #FFFFFF;
            text-shadow: 0 0 8px rgba(62, 230, 255, 0.5);
        }

        .nav-menu>li>a.active {
            color: #FFFFFF;
            text-shadow: 0 0 8px var(--brand-blue);
        }

        .nav-menu>li>a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--brand-neon);
            border-radius: 2px;
            box-shadow: 0 0 8px var(--brand-neon);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--brand-orange);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: 999px;
            white-space: nowrap;
            flex-shrink: 0;
            transition: var(--transition-bounce);
            box-shadow: 0 4px 14px rgba(255, 159, 67, 0.35);
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 159, 67, 0.5);
            color: #fff;
        }

        .nav-more-dropdown {
            position: absolute;
            top: 100%;
            right: 0;
            min-width: 200px;
            background: #111B2E;
            border-radius: 12px;
            box-shadow: 0 18px 40px rgba(0, 0, 0, 0.4);
            padding: 8px 0;
            opacity: 0;
            visibility: hidden;
            transform: translateY(8px);
            transition: var(--transition-base);
            z-index: 200;
        }

        .nav-menu>li:hover .nav-more-dropdown {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .nav-more-dropdown a {
            display: block;
            padding: 10px 18px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
            border-radius: 0;
            transition: var(--transition-base);
        }

        .nav-more-dropdown a:hover {
            color: #FFFFFF;
            background: rgba(47, 111, 237, 0.15);
            text-shadow: 0 0 8px rgba(62, 230, 255, 0.4);
        }

        /* Mobile nav */
        .nav-hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            transition: var(--transition-base);
        }

        .nav-hamburger span {
            display: block;
            width: 24px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition-base);
        }

        .nav-hamburger:hover span {
            background: var(--brand-neon);
        }

        @media (max-width: 1024px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: var(--brand-navy);
                flex-direction: column;
                align-items: stretch;
                padding: 12px 16px 20px;
                gap: 2px;
                border-bottom: 2px solid var(--brand-neon);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu>li>a {
                padding: 14px 16px;
                font-size: 16px;
                border-radius: 10px;
            }
            .nav-menu>li>a.active::after {
                display: none;
            }
            .nav-menu>li>a.active {
                background: rgba(47, 111, 237, 0.2);
                box-shadow: inset 0 0 20px rgba(62, 230, 255, 0.1);
            }
            .nav-more-dropdown {
                position: static;
                opacity: 1;
                visibility: visible;
                transform: none;
                background: transparent;
                box-shadow: none;
                padding: 4px 0 4px 20px;
                min-width: 0;
            }
            .nav-more-dropdown a {
                padding: 10px 16px;
                font-size: 15px;
            }
            .nav-hamburger {
                display: flex;
            }
            .nav-cta {
                padding: 8px 16px;
                font-size: 13px;
            }
        }

        @media (max-width: 640px) {
            .site-nav .nav-inner {
                min-height: 60px;
                gap: 8px;
            }
            .nav-logo .logo-text {
                font-size: 15px;
            }
            .nav-logo .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 15px;
            }
            .nav-cta {
                padding: 6px 12px;
                font-size: 12px;
            }
            .nav-menu {
                top: 60px;
            }
        }

        /* Breadcrumb */
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-light);
            flex-wrap: wrap;
        }

        .breadcrumb-nav a {
            color: var(--brand-blue);
            transition: var(--transition-base);
        }

        .breadcrumb-nav a:hover {
            color: var(--brand-orange);
        }

        .breadcrumb-nav .separator {
            color: var(--text-light);
            user-select: none;
        }

        .breadcrumb-nav .current {
            color: var(--text-dark);
            font-weight: 500;
        }

        /* Section heading */
        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.3;
            letter-spacing: -0.3px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-mid);
            line-height: 1.75;
            margin-top: 12px;
            max-width: 640px;
        }

        @media (max-width: 640px) {
            .section-title {
                font-size: 24px;
            }
            .section-subtitle {
                font-size: 14px;
            }
        }

        /* Card styles */
        .info-card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition-bounce);
            position: relative;
        }

        .info-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(47, 111, 237, 0.25);
        }

        .info-card .card-image {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .info-card:hover .card-image {
            transform: scale(1.04);
        }

        .info-card .card-body {
            padding: 20px 22px 22px;
        }

        .info-card .card-tag {
            display: inline-block;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 600;
            border-radius: 999px;
            background: rgba(47, 111, 237, 0.08);
            color: var(--brand-blue);
            margin-bottom: 12px;
            letter-spacing: 0.3px;
        }

        .info-card .card-tag.mint {
            background: rgba(46, 196, 182, 0.1);
            color: #1BA89C;
        }

        .info-card .card-tag.orange {
            background: rgba(255, 159, 67, 0.12);
            color: #E8892E;
        }

        .info-card .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.45;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .info-card .card-excerpt {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .info-card .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--text-light);
            margin-top: 16px;
            padding-top: 14px;
            border-top: 1px solid rgba(47, 111, 237, 0.08);
        }

        /* Featured article */
        .featured-card {
            background: #fff;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            overflow: hidden;
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            transition: var(--transition-bounce);
        }

        .featured-card:hover {
            box-shadow: var(--shadow-card-hover);
        }

        .featured-card .featured-image {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 320px;
        }

        .featured-card .featured-body {
            padding: 40px 36px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .featured-card .featured-body .featured-tag {
            display: inline-block;
            padding: 4px 14px;
            font-size: 13px;
            font-weight: 600;
            border-radius: 999px;
            background: rgba(255, 159, 67, 0.12);
            color: #E8892E;
            margin-bottom: 16px;
            width: fit-content;
        }

        .featured-card .featured-body h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.35;
            margin-bottom: 14px;
        }

        .featured-card .featured-body p {
            font-size: 15px;
            color: var(--text-mid);
            line-height: 1.75;
            margin-bottom: 20px;
        }

        .featured-card .featured-body .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--brand-blue);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            border-radius: 999px;
            width: fit-content;
            transition: var(--transition-bounce);
            box-shadow: 0 4px 14px rgba(47, 111, 237, 0.3);
        }

        .featured-card .featured-body .btn-primary:hover {
            transform: translateY(-2px);
            background: var(--brand-deep);
            box-shadow: 0 8px 24px rgba(47, 111, 237, 0.45);
            color: #fff;
        }

        @media (max-width: 768px) {
            .featured-card {
                grid-template-columns: 1fr;
            }
            .featured-card .featured-image {
                min-height: 220px;
                aspect-ratio: 16/9;
            }
            .featured-card .featured-body {
                padding: 24px 20px;
            }
            .featured-card .featured-body h2 {
                font-size: 20px;
            }
        }

        /* Button variants */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: var(--brand-blue);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            border-radius: 999px;
            transition: var(--transition-bounce);
            box-shadow: 0 4px 14px rgba(47, 111, 237, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            background: var(--brand-deep);
            box-shadow: 0 8px 24px rgba(47, 111, 237, 0.45);
            color: #fff;
        }

        .btn-orange {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: var(--brand-orange);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            border-radius: 999px;
            transition: var(--transition-bounce);
            box-shadow: 0 4px 14px rgba(255, 159, 67, 0.3);
        }

        .btn-orange:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 159, 67, 0.5);
            color: #fff;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 30px;
            background: transparent;
            color: var(--brand-blue);
            font-size: 15px;
            font-weight: 600;
            border-radius: 999px;
            border: 2px solid var(--brand-blue);
            transition: var(--transition-bounce);
        }

        .btn-outline:hover {
            background: rgba(47, 111, 237, 0.06);
            transform: translateY(-2px);
        }

        /* Filter tags */
        .filter-tag {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            font-size: 14px;
            font-weight: 500;
            border-radius: 999px;
            background: #fff;
            color: var(--text-mid);
            border: 1px solid var(--border-soft);
            transition: var(--transition-base);
            white-space: nowrap;
            cursor: pointer;
        }

        .filter-tag:hover {
            border-color: var(--brand-blue);
            color: var(--brand-blue);
            background: rgba(47, 111, 237, 0.04);
        }

        .filter-tag.active-tag {
            background: var(--brand-blue);
            color: #fff;
            border-color: var(--brand-blue);
            box-shadow: 0 4px 12px rgba(47, 111, 237, 0.25);
        }

        /* Ranking list */
        .ranking-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 18px;
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: var(--transition-base);
        }

        .ranking-item:hover {
            border-color: rgba(47, 111, 237, 0.25);
            box-shadow: var(--shadow-card);
        }

        .ranking-item .rank-number {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: rgba(47, 111, 237, 0.1);
            color: var(--brand-blue);
            font-weight: 700;
            font-size: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .ranking-item .rank-number.top1 {
            background: rgba(255, 159, 67, 0.15);
            color: #E8892E;
        }

        .ranking-item .rank-number.top2 {
            background: rgba(46, 196, 182, 0.15);
            color: #1BA89C;
        }

        .ranking-item .rank-number.top3 {
            background: rgba(47, 111, 237, 0.15);
            color: var(--brand-blue);
        }

        .ranking-item .rank-info {
            flex: 1;
            min-width: 0;
        }

        .ranking-item .rank-info h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-dark);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            margin: 0 0 4px;
        }

        .ranking-item .rank-info p {
            font-size: 13px;
            color: var(--text-light);
            margin: 0;
            display: flex;
            gap: 12px;
        }

        /* Stat block */
        .stat-block {
            text-align: center;
            padding: 24px 16px;
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: var(--transition-bounce);
        }

        .stat-block:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
        }

        .stat-block .stat-number {
            font-size: 36px;
            font-weight: 800;
            color: var(--brand-blue);
            line-height: 1.2;
            letter-spacing: -1px;
        }

        .stat-block .stat-label {
            font-size: 14px;
            color: var(--text-mid);
            margin-top: 6px;
        }

        /* Pagination */
        .pagination {
            display: flex;
            align-items: center;
            gap: 6px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 12px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition-base);
        }

        .pagination a {
            background: #fff;
            border: 1px solid var(--border-soft);
            color: var(--text-mid);
        }

        .pagination a:hover {
            border-color: var(--brand-blue);
            color: var(--brand-blue);
            background: rgba(47, 111, 237, 0.04);
        }

        .pagination .current-page {
            background: var(--brand-blue);
            color: #fff;
            border-color: var(--brand-blue);
            box-shadow: 0 4px 12px rgba(47, 111, 237, 0.3);
        }

        .pagination .dots {
            background: transparent;
            border: none;
            color: var(--text-light);
        }

        /* FAQ */
        .faq-item {
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition-base);
            margin-bottom: 12px;
        }

        .faq-item:hover {
            border-color: rgba(47, 111, 237, 0.2);
        }

        .faq-item .faq-question {
            padding: 18px 24px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-dark);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            transition: var(--transition-base);
            user-select: none;
        }

        .faq-item .faq-question:hover {
            color: var(--brand-blue);
        }

        .faq-item .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(47, 111, 237, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 500;
            color: var(--brand-blue);
            transition: var(--transition-base);
        }

        .faq-item .faq-answer {
            display: none;
            padding: 0 24px 20px;
            font-size: 15px;
            color: var(--text-mid);
            line-height: 1.75;
            border-left: 3px solid var(--brand-blue);
            margin-left: 24px;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--brand-blue);
            color: #fff;
        }

        /* Bottom fixed CTA */
        .bottom-fixed-cta {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 90;
            background: rgba(13, 21, 38, 0.95);
            backdrop-filter: blur(12px);
            border-top: 2px solid var(--brand-neon);
            padding: 12px 0;
            box-shadow: 0 -8px 32px rgba(13, 21, 38, 0.5);
        }

        .bottom-fixed-cta .cta-inner {
            display: flex;
            align-items: center;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .bottom-fixed-cta .cta-text {
            color: #fff;
            font-size: 15px;
            font-weight: 500;
            letter-spacing: 0.3px;
        }

        .bottom-fixed-cta .cta-text strong {
            color: var(--brand-neon);
            font-weight: 700;
        }

        .bottom-fixed-cta .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 24px;
            background: var(--brand-orange);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: 999px;
            transition: var(--transition-bounce);
            box-shadow: 0 4px 14px rgba(255, 159, 67, 0.4);
            white-space: nowrap;
        }

        .bottom-fixed-cta .cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 159, 67, 0.55);
            color: #fff;
        }

        @media (max-width: 640px) {
            .bottom-fixed-cta .cta-inner {
                gap: 8px;
                padding: 0 12px;
            }
            .bottom-fixed-cta .cta-text {
                font-size: 13px;
            }
            .bottom-fixed-cta .cta-btn {
                padding: 8px 16px;
                font-size: 13px;
            }
        }

        /* Footer */
        .site-footer {
            background: var(--brand-navy);
            color: rgba(255, 255, 255, 0.75);
            padding: 60px 0 24px;
            margin-top: 80px;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .site-footer .footer-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .site-footer .footer-logo span {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-blue), var(--brand-neon));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
            color: white;
        }

        .site-footer .footer-desc {
            font-size: 14px;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.6);
            max-width: 360px;
        }

        .site-footer .footer-col h4 {
            font-size: 16px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        .site-footer .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            padding: 6px 0;
            transition: var(--transition-base);
        }

        .site-footer .footer-col a:hover {
            color: var(--brand-neon);
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
            justify-content: space-between;
            align-items: center;
        }

        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition-base);
        }

        .site-footer .footer-bottom a:hover {
            color: var(--brand-neon);
        }

        @media (max-width: 768px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .site-footer {
                padding: 40px 0 20px;
                margin-top: 48px;
            }
        }

        @media (max-width: 520px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                gap: 6px;
                align-items: flex-start;
            }
        }

        /* Section spacing */
        .section-pad {
            padding-top: 72px;
            padding-bottom: 72px;
        }

        @media (max-width: 640px) {
            .section-pad {
                padding-top: 40px;
                padding-bottom: 40px;
            }
        }

        /* Category hero area */
        .category-hero {
            background: linear-gradient(180deg, rgba(47, 111, 237, 0.06) 0%, rgba(245, 249, 255, 0) 60%);
            border-bottom: 1px solid var(--border-light);
            padding: 48px 0 36px;
        }

        .category-hero h1 {
            font-size: 40px;
            font-weight: 800;
            color: var(--text-dark);
            line-height: 1.25;
            letter-spacing: -0.5px;
            margin: 16px 0 12px;
        }

        .category-hero .hero-desc {
            font-size: 17px;
            color: var(--text-mid);
            line-height: 1.8;
            max-width: 720px;
        }

        @media (max-width: 640px) {
            .category-hero {
                padding: 28px 0 24px;
            }
            .category-hero h1 {
                font-size: 28px;
                letter-spacing: -0.3px;
            }
            .category-hero .hero-desc {
                font-size: 15px;
            }
        }

        /* Subscribe box */
        .subscribe-box {
            background: #fff;
            border-radius: var(--radius-xl);
            padding: 40px 36px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 24px;
            align-items: center;
        }

        .subscribe-box .subscribe-text h3 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 8px;
        }

        .subscribe-box .subscribe-text p {
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.7;
        }

        .subscribe-box .subscribe-form {
            display: flex;
            gap: 10px;
            align-items: center;
            flex-wrap: wrap;
        }

        .subscribe-box .subscribe-form input {
            padding: 12px 18px;
            border: 1px solid var(--border-soft);
            border-radius: 12px;
            font-size: 14px;
            min-width: 220px;
            transition: var(--transition-base);
            background: #fafcff;
        }

        .subscribe-box .subscribe-form input:focus {
            outline: none;
            border-color: var(--brand-blue);
            box-shadow: 0 0 0 4px rgba(46, 196, 182, 0.1);
        }

        @media (max-width: 768px) {
            .subscribe-box {
                grid-template-columns: 1fr;
                padding: 28px 20px;
            }
            .subscribe-box .subscribe-form input {
                min-width: 100%;
            }
        }

        /* Image overlay for card */
        .card-image-wrapper {
            position: relative;
            overflow: hidden;
        }

        .card-image-wrapper .card-tag-overlay {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 5;
            display: inline-block;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 600;
            border-radius: 999px;
            background: rgba(13, 21, 38, 0.65);
            color: #fff;
            backdrop-filter: blur(4px);
            letter-spacing: 0.3px;
        }

/* roulang page: category5 */
:root {
            --brand-blue: #2F6FED;
            --brand-deep: #3B6FF6;
            --brand-navy: #0D1526;
            --brand-neon: #3EE6FF;
            --brand-orange: #FF9F43;
            --brand-mint: #2EC4B6;
            --brand-light: #F5F9FF;
            --text-dark: #1A2333;
            --text-mid: #4A5568;
            --text-light: #718096;
            --text-white: #FFFFFF;
            --border-light: rgba(47, 111, 237, 0.12);
            --border-soft: #DCE8F5;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --shadow-card: 0 10px 30px rgba(30, 60, 120, 0.08);
            --shadow-card-hover: 0 18px 44px rgba(30, 60, 120, 0.16);
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, 'Inter', 'Roboto', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-dark);
            background-color: var(--brand-light);
            padding-bottom: 120px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container-site {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 640px) {
            .container-site {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* Navigation */
        .site-nav {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--brand-navy);
            border-bottom: 2px solid transparent;
            border-image: linear-gradient(90deg, var(--brand-neon), var(--brand-blue), var(--brand-neon)) 1;
            box-shadow: 0 4px 20px rgba(13, 21, 38, 0.45);
        }

        .site-nav .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: 16px;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            white-space: nowrap;
        }

        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-blue), var(--brand-neon));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            color: white;
            flex-shrink: 0;
            box-shadow: 0 0 12px rgba(62, 230, 255, 0.4);
        }

        .nav-logo .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .nav-logo .logo-text span {
            color: var(--brand-neon);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: nowrap;
        }

        .nav-menu>li {
            position: relative;
            flex-shrink: 0;
        }

        .nav-menu>li>a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 12px;
            font-size: 14px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            border-radius: 8px;
            white-space: nowrap;
            transition: var(--transition-base);
            position: relative;
        }

        .nav-menu>li>a:hover {
            color: #FFFFFF;
            text-shadow: 0 0 8px rgba(62, 230, 255, 0.5);
        }

        .nav-menu>li>a.active {
            color: #FFFFFF;
            text-shadow: 0 0 8px var(--brand-blue);
        }

        .nav-menu>li>a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--brand-neon);
            border-radius: 2px;
            box-shadow: 0 0 8px var(--brand-neon);
        }

        .nav-dropdown {
            position: absolute;
            top: 100%;
            right: 0;
            min-width: 200px;
            background: #111B2E;
            border-radius: 12px;
            box-shadow: 0 18px 40px rgba(0, 0, 0, 0.4);
            padding: 8px 0;
            opacity: 0;
            visibility: hidden;
            transform: translateY(8px);
            transition: var(--transition-base);
            z-index: 200;
        }

        .nav-dropdown.open {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .nav-dropdown a {
            display: block;
            padding: 10px 18px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            white-space: nowrap;
            transition: var(--transition-base);
        }

        .nav-dropdown a:hover {
            background: rgba(62, 230, 255, 0.08);
            color: #FFFFFF;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--brand-orange);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: 999px;
            white-space: nowrap;
            flex-shrink: 0;
            transition: var(--transition-bounce);
            box-shadow: 0 4px 14px rgba(255, 159, 67, 0.35);
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 159, 67, 0.5);
            color: #fff;
        }

        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 22px;
            flex-shrink: 0;
            transition: var(--transition-base);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.15);
        }

        @media (max-width: 1024px) {
            .nav-menu>li>a {
                padding: 10px 8px;
                font-size: 13px;
            }
            .nav-cta {
                padding: 8px 16px;
                font-size: 13px;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--brand-navy);
                flex-direction: column;
                align-items: stretch;
                padding: 16px;
                border-bottom: 2px solid var(--brand-blue);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
                gap: 0;
            }
            .nav-menu.open {
                display: flex;
            }
            .nav-menu>li>a {
                padding: 12px 16px;
                font-size: 15px;
                border-radius: 8px;
                width: 100%;
            }
            .nav-dropdown {
                position: static;
                background: rgba(255, 255, 255, 0.04);
                box-shadow: none;
                border-radius: 8px;
                padding: 4px 0;
                min-width: auto;
                opacity: 1;
                visibility: visible;
                transform: none;
                display: none;
                margin-top: 4px;
            }
            .nav-dropdown.open {
                display: block;
            }
            .nav-cta {
                margin-top: 8px;
                justify-content: center;
            }
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-light);
            flex-wrap: wrap;
            padding: 16px 0 8px;
        }

        .breadcrumb a {
            color: var(--brand-blue);
            transition: var(--transition-base);
        }

        .breadcrumb a:hover {
            color: var(--brand-deep);
        }

        .breadcrumb .separator {
            color: var(--text-light);
            opacity: 0.6;
        }

        .breadcrumb .current {
            color: var(--text-mid);
            font-weight: 500;
        }

        /* Hero Banner */
        .page-hero {
            position: relative;
            border-radius: var(--radius-xl);
            overflow: hidden;
            background-size: cover;
            background-position: center;
            min-height: 320px;
            display: flex;
            align-items: flex-end;
            margin-bottom: 48px;
            box-shadow: 0 20px 50px rgba(30, 60, 120, 0.15);
        }

        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 21, 38, 0.85) 0%, rgba(47, 111, 237, 0.55) 55%, rgba(13, 21, 38, 0.75) 100%);
            z-index: 1;
        }

        .page-hero-content {
            position: relative;
            z-index: 2;
            padding: 48px 40px 40px;
            max-width: 820px;
        }

        .page-hero-content h1 {
            font-size: 42px;
            font-weight: 700;
            color: #FFFFFF;
            line-height: 1.25;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        .page-hero-content p {
            font-size: 17px;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            max-width: 650px;
        }

        @media (max-width: 768px) {
            .page-hero {
                min-height: 260px;
                border-radius: var(--radius-lg);
            }
            .page-hero-content {
                padding: 32px 24px 24px;
            }
            .page-hero-content h1 {
                font-size: 28px;
            }
            .page-hero-content p {
                font-size: 15px;
            }
        }

        /* Section */
        .section {
            padding: 48px 0;
        }

        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.35;
            margin-bottom: 8px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-mid);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 720px;
        }

        @media (max-width: 768px) {
            .section {
                padding: 32px 0;
            }
            .section-title {
                font-size: 22px;
            }
            .section-subtitle {
                font-size: 15px;
            }
        }

        /* Cards */
        .card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            transition: var(--transition-base);
            overflow: hidden;
        }

        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(47, 111, 237, 0.25);
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: var(--brand-blue);
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            border-radius: 999px;
            transition: var(--transition-bounce);
            box-shadow: 0 6px 20px rgba(47, 111, 237, 0.35);
            white-space: nowrap;
        }

        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(47, 111, 237, 0.5);
            color: #fff;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            background: transparent;
            color: var(--brand-blue);
            font-size: 16px;
            font-weight: 600;
            border-radius: 999px;
            border: 2px solid var(--brand-blue);
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .btn-secondary:hover {
            background: rgba(47, 111, 237, 0.08);
            color: var(--brand-deep);
            border-color: var(--brand-deep);
            transform: translateY(-2px);
        }

        /* Tags */
        .tag {
            display: inline-flex;
            align-items: center;
            padding: 4px 14px;
            font-size: 13px;
            font-weight: 500;
            border-radius: 999px;
            background: rgba(46, 196, 182, 0.12);
            color: #1A8F82;
            white-space: nowrap;
            transition: var(--transition-base);
        }

        .tag:hover {
            background: rgba(46, 196, 182, 0.2);
        }

        /* Feature cards */
        .feature-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
            height: 100%;
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(47, 111, 237, 0.25);
        }

        .feature-card .icon-box {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 16px;
            flex-shrink: 0;
        }

        .feature-card h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 8px;
        }

        .feature-card p {
            font-size: 15px;
            color: var(--text-mid);
            line-height: 1.7;
        }

        /* Steps */
        .step-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 20px 0;
            border-bottom: 1px solid var(--border-soft);
        }

        .step-item:last-child {
            border-bottom: none;
        }

        .step-number {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--brand-blue);
            color: #fff;
            font-weight: 700;
            font-size: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .step-content h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 4px;
        }

        .step-content p {
            font-size: 15px;
            color: var(--text-mid);
            line-height: 1.7;
        }

        /* FAQ */
        .faq-item {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-soft);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-item:hover {
            border-color: rgba(47, 111, 237, 0.3);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 20px;
            font-size: 17px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            user-select: none;
            transition: var(--transition-base);
            background: #FFFFFF;
            width: 100%;
            text-align: left;
        }

        .faq-question:hover {
            background: rgba(47, 111, 237, 0.04);
        }

        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(47, 111, 237, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-blue);
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
            transition: var(--transition-base);
        }

        .faq-answer {
            padding: 0 20px 18px;
            font-size: 15px;
            color: var(--text-mid);
            line-height: 1.75;
            display: none;
            border-left: 3px solid var(--brand-blue);
            margin-left: 20px;
            padding-left: 16px;
        }

        .faq-answer.open {
            display: block;
        }

        .faq-item.active .faq-icon {
            background: var(--brand-blue);
            color: #fff;
            transform: rotate(45deg);
        }

        /* CTA */
        .cta-section {
            background: var(--brand-navy);
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -80px;
            width: 250px;
            height: 250px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(62, 230, 255, 0.2) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: 28px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 8px;
            position: relative;
            z-index: 1;
        }

        .cta-section p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
            max-width: 560px;
        }

        @media (max-width: 768px) {
            .cta-section {
                padding: 32px 24px;
                border-radius: var(--radius-lg);
            }
            .cta-section h2 {
                font-size: 22px;
            }
        }

        /* Footer */
        .site-footer {
            background: var(--brand-navy);
            padding: 56px 0 32px;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 64px;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            max-width: 380px;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: #FFFFFF;
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            margin-bottom: 10px;
            transition: var(--transition-base);
        }

        .footer-col a:hover {
            color: var(--brand-neon);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 16px;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.6);
            transition: var(--transition-base);
        }

        .footer-bottom a:hover {
            color: var(--brand-neon);
        }

        @media (max-width: 992px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 640px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        /* Focus accessibility */
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--brand-neon);
            outline-offset: 2px;
            border-radius: 4px;
        }

        /* Image hover */
        .img-zoom {
            overflow: hidden;
            border-radius: var(--radius-md);
        }

        .img-zoom img {
            transition: transform 0.4s ease;
        }

        .img-zoom:hover img {
            transform: scale(1.04);
        }

        /* Stat box */
        .stat-box {
            background: #FFFFFF;
            border-radius: var(--radius-md);
            padding: 20px 24px;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
        }

        .stat-box:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
        }

        .stat-box .stat-num {
            font-size: 32px;
            font-weight: 700;
            color: var(--brand-blue);
            line-height: 1.2;
            margin-bottom: 4px;
        }

        .stat-box .stat-label {
            font-size: 14px;
            color: var(--text-mid);
        }

/* roulang page: category6 */
:root {
            --brand-blue: #2F6FED;
            --brand-deep: #3B6FF6;
            --brand-navy: #0D1526;
            --brand-neon: #3EE6FF;
            --brand-orange: #FF9F43;
            --brand-mint: #2EC4B6;
            --brand-light: #F5F9FF;
            --text-dark: #1A2333;
            --text-mid: #4A5568;
            --text-light: #718096;
            --text-white: #FFFFFF;
            --border-light: rgba(47, 111, 237, 0.12);
            --border-soft: #DCE8F5;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --shadow-card: 0 10px 30px rgba(30, 60, 120, 0.08);
            --shadow-card-hover: 0 18px 44px rgba(30, 60, 120, 0.16);
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, 'Inter', 'Roboto', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-dark);
            background-color: var(--brand-light);
            padding-bottom: 120px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container-site {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        @media (max-width: 640px) {
            .container-site {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* Navigation */
        .site-nav {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--brand-navy);
            border-bottom: 2px solid transparent;
            border-image: linear-gradient(90deg, var(--brand-neon), var(--brand-blue), var(--brand-neon)) 1;
            box-shadow: 0 4px 20px rgba(13, 21, 38, 0.45);
        }

        .site-nav .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: 16px;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            white-space: nowrap;
        }

        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-blue), var(--brand-neon));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            color: white;
            flex-shrink: 0;
            box-shadow: 0 0 12px rgba(62, 230, 255, 0.4);
        }

        .nav-logo .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .nav-logo .logo-text span {
            color: var(--brand-neon);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: nowrap;
            margin: 0;
            padding: 0;
        }

        .nav-menu>li {
            position: relative;
            flex-shrink: 0;
        }

        .nav-menu>li>a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 12px;
            font-size: 14px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            border-radius: 8px;
            white-space: nowrap;
            transition: var(--transition-base);
            position: relative;
        }

        .nav-menu>li>a:hover {
            color: #FFFFFF;
            text-shadow: 0 0 8px rgba(62, 230, 255, 0.5);
        }

        .nav-menu>li>a.active {
            color: #FFFFFF;
            text-shadow: 0 0 8px var(--brand-blue);
        }

        .nav-menu>li>a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--brand-neon);
            border-radius: 2px;
            box-shadow: 0 0 8px var(--brand-neon);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--brand-orange);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: 999px;
            white-space: nowrap;
            flex-shrink: 0;
            transition: var(--transition-bounce);
            box-shadow: 0 4px 14px rgba(255, 159, 67, 0.35);
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 159, 67, 0.5);
            color: #fff;
        }

        .dropdown-menu {
            position: absolute;
            top: 100%;
            right: 0;
            min-width: 200px;
            background: #111B2E;
            border-radius: 12px;
            box-shadow: 0 18px 40px rgba(0, 0, 0, 0.4);
            padding: 8px 0;
            opacity: 0;
            visibility: hidden;
            transform: translateY(8px);
            transition: var(--transition-base);
            z-index: 200;
        }

        .nav-menu>li:hover .dropdown-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .dropdown-menu a {
            display: block;
            padding: 10px 18px;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.8);
            border-radius: 6px;
            margin: 2px 6px;
            transition: var(--transition-base);
        }

        .dropdown-menu a:hover {
            background: rgba(62, 230, 255, 0.12);
            color: #FFFFFF;
        }

        .dropdown-menu a.active {
            background: rgba(47, 111, 237, 0.25);
            color: #FFFFFF;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            transition: var(--transition-base);
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition-base);
        }

        @media (max-width: 1024px) {
            .nav-menu {
                gap: 0;
            }
            .nav-menu>li>a {
                padding: 10px 8px;
                font-size: 13px;
            }
            .nav-cta {
                padding: 8px 16px;
                font-size: 13px;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }
            .nav-menu {
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--brand-navy);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 12px 16px;
                border-top: 1px solid rgba(62, 230, 255, 0.2);
                box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            }
            .nav-menu.open {
                max-height: 600px;
            }
            .nav-menu>li {
                width: 100%;
            }
            .nav-menu>li>a {
                padding: 14px 8px;
                font-size: 15px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                border-radius: 0;
            }
            .nav-menu>li>a.active::after {
                display: none;
            }
            .dropdown-menu {
                position: static;
                background: rgba(255, 255, 255, 0.05);
                box-shadow: none;
                padding: 4px 0 4px 16px;
                opacity: 1;
                visibility: visible;
                transform: none;
                min-width: 100%;
                border-radius: 0;
                display: none;
            }
            .nav-menu>li:hover .dropdown-menu {
                display: block;
            }
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: var(--brand-orange);
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            border-radius: 999px;
            transition: var(--transition-bounce);
            box-shadow: 0 4px 14px rgba(255, 159, 67, 0.35);
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 28px rgba(255, 159, 67, 0.5);
            color: #fff;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            background: transparent;
            color: var(--brand-blue);
            font-size: 16px;
            font-weight: 600;
            border-radius: 999px;
            border: 2px solid var(--brand-blue);
            transition: var(--transition-base);
            cursor: pointer;
        }

        .btn-secondary:hover {
            background: rgba(47, 111, 237, 0.08);
            transform: translateY(-2px);
        }

        /* Cards */
        .topic-card {
            background: #fff;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition-base);
            cursor: pointer;
        }

        .topic-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(47, 111, 237, 0.3);
        }

        .topic-card .card-image {
            aspect-ratio: 16/9;
            overflow: hidden;
            position: relative;
        }

        .topic-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .topic-card:hover .card-image img {
            transform: scale(1.05);
        }

        .tag-badge {
            display: inline-block;
            padding: 4px 12px;
            font-size: 12px;
            font-weight: 600;
            border-radius: 999px;
            background: rgba(46, 196, 182, 0.15);
            color: #0D9488;
            letter-spacing: 0.3px;
        }

        .tag-badge-blue {
            background: rgba(47, 111, 237, 0.12);
            color: var(--brand-blue);
        }

        .tag-badge-orange {
            background: rgba(255, 159, 67, 0.15);
            color: #D97706;
        }

        /* Feature card */
        .feature-card {
            background: #fff;
            border-radius: var(--radius-xl);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition-base);
        }

        .feature-card:hover {
            box-shadow: var(--shadow-card-hover);
        }

        /* FAQ */
        .faq-item {
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-item.active {
            border-left: 3px solid var(--brand-blue);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 20px;
            font-size: 17px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            transition: var(--transition-base);
            gap: 16px;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }

        .faq-question:hover {
            background: rgba(47, 111, 237, 0.04);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--brand-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--brand-blue);
            font-weight: 700;
            transition: var(--transition-base);
        }

        .faq-item.active .faq-question .faq-icon {
            background: var(--brand-blue);
            color: #fff;
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            padding: 0 20px;
        }

        .faq-item.active .faq-answer {
            padding: 0 20px 18px;
        }

        .faq-answer p {
            font-size: 15px;
            color: var(--text-mid);
            line-height: 1.75;
            margin: 0;
        }

        /* Bottom CTA */
        .bottom-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 90;
            background: rgba(13, 21, 38, 0.92);
            backdrop-filter: blur(12px);
            border-top: 1px solid rgba(62, 230, 255, 0.25);
            padding: 12px 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            min-height: 64px;
        }

        @media (max-width: 640px) {
            .bottom-cta-bar {
                padding: 10px 12px;
                flex-wrap: wrap;
                gap: 8px;
            }
            .bottom-cta-bar .btn-primary {
                padding: 10px 20px;
                font-size: 14px;
            }
        }

        /* Section spacing */
        .section-pad {
            padding-top: 72px;
            padding-bottom: 72px;
        }

        @media (max-width: 640px) {
            .section-pad {
                padding-top: 40px;
                padding-bottom: 40px;
            }
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 16px;
        }

        .breadcrumb a {
            color: var(--brand-blue);
            font-weight: 500;
        }

        .breadcrumb a:hover {
            color: var(--brand-deep);
            text-decoration: underline;
        }

        .breadcrumb .separator {
            color: #CBD5E0;
        }

        .breadcrumb .current {
            color: var(--text-mid);
            font-weight: 500;
        }

        /* Footer */
        .site-footer {
            background: var(--brand-navy);
            color: rgba(255, 255, 255, 0.8);
            padding: 60px 0 30px;
            margin-top: 80px;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        @media (max-width: 768px) {
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
        }

        .site-footer .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }

        .site-footer .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .site-footer .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .site-footer .footer-col a {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            padding: 4px 0;
            transition: var(--transition-base);
        }

        .site-footer .footer-col a:hover {
            color: var(--brand-neon);
            padding-left: 4px;
        }

        .site-footer .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
            padding-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.5);
        }

        .site-footer .footer-bottom a {
            color: rgba(255, 255, 255, 0.65);
            transition: var(--transition-base);
        }

        .site-footer .footer-bottom a:hover {
            color: var(--brand-neon);
        }

        /* Review card */
        .review-card {
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            padding: 20px;
            transition: var(--transition-base);
        }

        .review-card:hover {
            box-shadow: var(--shadow-card);
        }

        /* Stat block */
        .stat-block {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            padding: 32px 24px;
            text-align: center;
            transition: var(--transition-base);
        }

        .stat-block:hover {
            box-shadow: var(--shadow-card);
            transform: translateY(-2px);
        }

        .stat-block .stat-number {
            font-size: 36px;
            font-weight: 700;
            color: var(--brand-blue);
            line-height: 1.2;
            margin-bottom: 4px;
        }

        .stat-block .stat-label {
            font-size: 14px;
            color: var(--text-light);
        }

        /* Partner tag */
        .partner-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            background: #fff;
            border-radius: 999px;
            border: 1px solid var(--border-soft);
            font-size: 13px;
            font-weight: 500;
            color: var(--text-mid);
            transition: var(--transition-base);
            cursor: default;
        }

        .partner-tag:hover {
            border-color: var(--brand-blue);
            color: var(--brand-blue);
            box-shadow: 0 4px 12px rgba(47, 111, 237, 0.15);
        }

        /* Ranking list */
        .rank-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 14px 16px;
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: var(--transition-base);
            margin-bottom: 8px;
        }

        .rank-item:hover {
            box-shadow: var(--shadow-card);
            transform: translateX(4px);
        }

        .rank-item .rank-number {
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--brand-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
            color: var(--brand-blue);
            flex-shrink: 0;
        }

        .rank-item:nth-child(1) .rank-number {
            background: var(--brand-orange);
            color: #fff;
        }

        .rank-item:nth-child(2) .rank-number {
            background: #CBD5E0;
            color: #fff;
        }

        .rank-item:nth-child(3) .rank-number {
            background: #F6AD55;
            color: #fff;
        }

        .rank-item .rank-title {
            font-weight: 600;
            font-size: 15px;
            color: var(--text-dark);
            flex: 1;
        }

        .rank-item .rank-meta {
            font-size: 13px;
            color: var(--text-light);
            white-space: nowrap;
        }

        /* Section title */
        .section-title {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 8px;
            line-height: 1.35;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-light);
            margin-bottom: 32px;
            max-width: 640px;
        }

        @media (max-width: 640px) {
            .section-title {
                font-size: 24px;
            }
        }

        /* Pagination */
        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            margin-top: 32px;
        }

        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            font-size: 14px;
            font-weight: 500;
            background: #fff;
            border: 1px solid var(--border-soft);
            color: var(--text-mid);
            transition: var(--transition-base);
        }

        .pagination a:hover {
            border-color: var(--brand-blue);
            color: var(--brand-blue);
            box-shadow: 0 4px 12px rgba(47, 111, 237, 0.15);
        }

        .pagination span.current {
            background: var(--brand-blue);
            color: #fff;
            border-color: var(--brand-blue);
        }

/* roulang page: category7 */
:root {
            --brand-blue: #2F6FED;
            --brand-deep: #3B6FF6;
            --brand-navy: #0D1526;
            --brand-neon: #3EE6FF;
            --brand-orange: #FF9F43;
            --brand-mint: #2EC4B6;
            --brand-light: #F5F9FF;
            --text-dark: #1A2333;
            --text-mid: #4A5568;
            --text-light: #718096;
            --text-white: #FFFFFF;
            --border-light: rgba(47, 111, 237, 0.12);
            --border-soft: #DCE8F5;
            --radius-md: 12px;
            --radius-lg: 18px;
            --radius-xl: 24px;
            --shadow-card: 0 10px 30px rgba(30, 60, 120, 0.08);
            --shadow-card-hover: 0 18px 44px rgba(30, 60, 120, 0.16);
            --transition-base: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-bounce: all 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, 'Inter', 'Roboto', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-dark);
            background-color: var(--brand-light);
            padding-bottom: 120px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            color: inherit;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
        }

        .container-site {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .site-nav {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--brand-navy);
            border-bottom: 2px solid transparent;
            border-image: linear-gradient(90deg, var(--brand-neon), var(--brand-blue), var(--brand-neon)) 1;
            box-shadow: 0 4px 20px rgba(13, 21, 38, 0.45);
        }

        .site-nav .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 68px;
            gap: 16px;
            flex-wrap: nowrap;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            white-space: nowrap;
        }

        .nav-logo .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-blue), var(--brand-neon));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 18px;
            color: white;
            flex-shrink: 0;
            box-shadow: 0 0 12px rgba(62, 230, 255, 0.4);
        }

        .nav-logo .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: #FFFFFF;
            letter-spacing: 0.5px;
            white-space: nowrap;
        }

        .nav-logo .logo-text span {
            color: var(--brand-neon);
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
            flex-wrap: nowrap;
        }

        .nav-menu>li {
            position: relative;
            flex-shrink: 0;
        }

        .nav-menu>li>a {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 12px;
            font-size: 14px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.75);
            border-radius: 8px;
            white-space: nowrap;
            transition: var(--transition-base);
            position: relative;
        }

        .nav-menu>li>a:hover {
            color: #FFFFFF;
            text-shadow: 0 0 8px rgba(62, 230, 255, 0.5);
        }

        .nav-menu>li>a.active {
            color: #FFFFFF;
            text-shadow: 0 0 8px var(--brand-blue);
        }

        .nav-menu>li>a.active::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--brand-neon);
            border-radius: 2px;
            box-shadow: 0 0 8px var(--brand-neon);
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--brand-orange);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: 999px;
            white-space: nowrap;
            flex-shrink: 0;
            transition: var(--transition-bounce);
            box-shadow: 0 4px 14px rgba(255, 159, 67, 0.35);
        }

        .nav-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 159, 67, 0.5);
            color: #fff;
        }

        .dropdown-menu {
            position: absolute;
            top: 100%;
            right: 0;
            min-width: 200px;
            background: #111B2E;
            border-radius: 12px;
            box-shadow: 0 18px 40px rgba(0, 0, 0, 0.4);
            padding: 8px 0;
            opacity: 0;
            visibility: hidden;
            transform: translateY(8px);
            transition: var(--transition-base);
            z-index: 200;
        }

        .nav-menu>li:hover .dropdown-menu,
        .nav-menu>li:focus-within .dropdown-menu {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .dropdown-menu a {
            display: block;
            padding: 10px 18px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.75);
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .dropdown-menu a:hover {
            color: #FFFFFF;
            background: rgba(47, 111, 237, 0.15);
            text-shadow: 0 0 6px rgba(62, 230, 255, 0.4);
        }

        .dropdown-menu a.active {
            color: #FFFFFF;
            background: rgba(47, 111, 237, 0.2);
            text-shadow: 0 0 8px var(--brand-blue);
            border-left: 3px solid var(--brand-neon);
        }

        .mobile-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.08);
            transition: var(--transition-base);
        }

        .mobile-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition-base);
        }

        .mobile-menu {
            display: none;
            background: var(--brand-navy);
            border-top: 1px solid rgba(62, 230, 255, 0.15);
            padding: 12px 16px 20px;
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-menu a {
            display: block;
            padding: 12px 16px;
            font-size: 15px;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.8);
            border-radius: 10px;
            transition: var(--transition-base);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            color: #FFFFFF;
            background: rgba(47, 111, 237, 0.2);
            text-shadow: 0 0 8px var(--brand-blue);
        }

        .mobile-menu .submenu-item {
            padding-left: 36px;
            font-size: 14px;
        }

        .category-hero {
            background: linear-gradient(180deg, #E8F1FE 0%, var(--brand-light) 100%);
            padding: 56px 0 40px;
            position: relative;
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(47, 111, 237, 0.08), transparent 70%);
            pointer-events: none;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-light);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-light);
            transition: var(--transition-base);
        }

        .breadcrumb a:hover {
            color: var(--brand-blue);
        }

        .breadcrumb .separator {
            color: #B0C4DE;
        }

        .breadcrumb .current {
            color: var(--brand-blue);
            font-weight: 600;
        }

        .category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            background: rgba(47, 111, 237, 0.1);
            color: var(--brand-blue);
            font-size: 13px;
            font-weight: 600;
            border-radius: 999px;
            margin-bottom: 16px;
            border: 1px solid rgba(47, 111, 237, 0.2);
        }

        .category-hero h1 {
            font-size: 40px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-dark);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .category-hero .hero-desc {
            font-size: 16px;
            color: var(--text-mid);
            max-width: 720px;
            line-height: 1.8;
        }

        .filter-bar {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            padding: 16px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            margin-bottom: 32px;
        }

        .filter-group {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: wrap;
        }

        .filter-label {
            font-size: 13px;
            color: var(--text-light);
            font-weight: 500;
            white-space: nowrap;
        }

        .filter-chip {
            padding: 6px 14px;
            font-size: 13px;
            border-radius: 999px;
            background: var(--brand-light);
            color: var(--text-mid);
            border: 1px solid var(--border-light);
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .filter-chip:hover {
            border-color: var(--brand-blue);
            color: var(--brand-blue);
        }

        .filter-chip.active {
            background: var(--brand-blue);
            color: #fff;
            border-color: var(--brand-blue);
            box-shadow: 0 4px 12px rgba(47, 111, 237, 0.3);
        }

        .sort-select-wrap {
            position: relative;
            flex-shrink: 0;
        }

        .sort-select {
            appearance: none;
            padding: 8px 36px 8px 16px;
            font-size: 13px;
            border-radius: 10px;
            border: 1px solid var(--border-soft);
            background: #fff;
            color: var(--text-mid);
            cursor: pointer;
            transition: var(--transition-base);
            min-width: 140px;
        }

        .sort-select:focus {
            outline: none;
            border-color: var(--brand-blue);
            box-shadow: 0 0 0 3px rgba(47, 111, 237, 0.15);
        }

        .sort-select-wrap::after {
            content: '▾';
            position: absolute;
            right: 14px;
            top: 50%;
            transform: translateY(-50%);
            color: var(--text-light);
            pointer-events: none;
            font-size: 12px;
        }

        .resource-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-bottom: 40px;
        }

        .resource-card {
            background: #FFFFFF;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition-bounce);
            display: flex;
            flex-direction: column;
        }

        .resource-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(47, 111, 237, 0.3);
        }

        .resource-card .card-cover {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
            background: #E8F1FE;
        }

        .resource-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .resource-card:hover .card-cover img {
            transform: scale(1.05);
        }

        .resource-card .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 12px;
            font-size: 11px;
            font-weight: 600;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.92);
            color: var(--brand-blue);
            letter-spacing: 0.3px;
            backdrop-filter: blur(4px);
        }

        .resource-card .card-tag.mint {
            color: #0E8F83;
        }

        .resource-card .card-tag.orange {
            color: var(--brand-orange);
        }

        .resource-card .card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .resource-card .card-title {
            font-size: 17px;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.45;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .resource-card:hover .card-title {
            color: var(--brand-blue);
        }

        .resource-card .card-summary {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
            flex: 1;
        }

        .resource-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--text-light);
            padding-top: 12px;
            border-top: 1px solid rgba(47, 111, 237, 0.08);
        }

        .resource-card .card-meta .meta-item {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .featured-section {
            margin-bottom: 48px;
        }

        .section-heading {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
            flex-wrap: wrap;
            gap: 12px;
        }

        .section-heading h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-dark);
            line-height: 1.35;
        }

        .section-heading .section-sub {
            font-size: 14px;
            color: var(--text-light);
        }

        .featured-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .featured-item {
            display: flex;
            align-items: center;
            gap: 20px;
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 16px 20px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: var(--transition-base);
        }

        .featured-item:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(47, 111, 237, 0.25);
            transform: translateX(4px);
        }

        .featured-item .featured-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--brand-blue), var(--brand-neon));
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            color: #fff;
            font-size: 22px;
            font-weight: 700;
        }

        .featured-item .featured-icon.mint-bg {
            background: linear-gradient(135deg, var(--brand-mint), #7FE0D4);
        }

        .featured-item .featured-icon.orange-bg {
            background: linear-gradient(135deg, var(--brand-orange), #FFC48A);
        }

        .featured-item .featured-info {
            flex: 1;
            min-width: 0;
        }

        .featured-item .featured-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 4px;
        }

        .featured-item .featured-desc {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 1;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .featured-item .featured-action {
            padding: 8px 18px;
            font-size: 13px;
            font-weight: 600;
            border-radius: 999px;
            background: rgba(47, 111, 237, 0.08);
            color: var(--brand-blue);
            transition: var(--transition-base);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .featured-item .featured-action:hover {
            background: var(--brand-blue);
            color: #fff;
            box-shadow: 0 4px 14px rgba(47, 111, 237, 0.35);
        }

        .steps-section {
            background: #FFFFFF;
            border-radius: var(--radius-xl);
            padding: 40px;
            margin-bottom: 48px;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 24px;
        }

        .step-item {
            text-align: left;
            padding: 20px;
            border-radius: var(--radius-lg);
            background: var(--brand-light);
            border: 1px solid var(--border-light);
            transition: var(--transition-base);
        }

        .step-item:hover {
            border-color: var(--brand-blue);
            box-shadow: 0 8px 20px rgba(47, 111, 237, 0.12);
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--brand-blue);
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .step-item h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            margin-bottom: 6px;
        }

        .step-item p {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.7;
        }

        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            margin: 32px 0 48px;
            flex-wrap: wrap;
        }

        .pagination a,
        .pagination button {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 10px;
            font-size: 14px;
            font-weight: 500;
            border-radius: 10px;
            background: #fff;
            color: var(--text-mid);
            border: 1px solid var(--border-light);
            transition: var(--transition-base);
        }

        .pagination a:hover,
        .pagination button:hover {
            border-color: var(--brand-blue);
            color: var(--brand-blue);
        }

        .pagination a.active,
        .pagination button.active {
            background: var(--brand-blue);
            color: #fff;
            border-color: var(--brand-blue);
            box-shadow: 0 4px 14px rgba(47, 111, 237, 0.35);
        }

        .pagination .dots {
            color: var(--text-light);
            padding: 0 4px;
        }

        .faq-section {
            margin-bottom: 48px;
        }

        .faq-item {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            margin-bottom: 12px;
            overflow: hidden;
            transition: var(--transition-base);
        }

        .faq-item:hover {
            border-color: rgba(47, 111, 237, 0.2);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            padding: 18px 20px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-dark);
            cursor: pointer;
            transition: var(--transition-base);
            text-align: left;
            width: 100%;
        }

        .faq-question:hover {
            color: var(--brand-blue);
        }

        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: var(--brand-light);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 16px;
            color: var(--brand-blue);
            transition: var(--transition-base);
        }

        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--brand-blue);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-in-out;
            border-left: 3px solid var(--brand-blue);
            background: #FAFCFF;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
        }

        .faq-answer p {
            padding: 14px 20px;
            font-size: 14px;
            color: var(--text-mid);
            line-height: 1.8;
        }

        .bottom-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 90;
            background: rgba(13, 21, 38, 0.92);
            backdrop-filter: blur(12px);
            border-top: 1px solid rgba(62, 230, 255, 0.25);
            padding: 12px 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .bottom-cta-bar .cta-text {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.85);
        }

        .bottom-cta-bar .cta-text strong {
            color: var(--brand-neon);
            font-weight: 600;
        }

        .btn-primary-circle {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 24px;
            background: var(--brand-orange);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border-radius: 999px;
            transition: var(--transition-bounce);
            box-shadow: 0 4px 14px rgba(255, 159, 67, 0.4);
            white-space: nowrap;
        }

        .btn-primary-circle:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 26px rgba(255, 159, 67, 0.55);
            color: #fff;
        }

        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border: 1px solid rgba(255, 255, 255, 0.35);
            color: rgba(255, 255, 255, 0.9);
            font-size: 14px;
            font-weight: 500;
            border-radius: 999px;
            transition: var(--transition-base);
            white-space: nowrap;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.6);
            color: #fff;
        }

        .site-footer {
            background: var(--brand-navy);
            color: rgba(255, 255, 255, 0.7);
            padding: 56px 0 32px;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 40px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-logo .footer-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--brand-blue), var(--brand-neon));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: #fff;
            font-weight: 700;
            flex-shrink: 0;
        }

        .footer-desc {
            font-size: 13px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.55);
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }

        .footer-col a {
            display: block;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.55);
            margin-bottom: 10px;
            transition: var(--transition-base);
        }

        .footer-col a:hover {
            color: var(--brand-neon);
            text-shadow: 0 0 6px rgba(62, 230, 255, 0.4);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px 20px;
            font-size: 12px;
            color: rgba(255, 255, 255, 0.4);
            justify-content: space-between;
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
            transition: var(--transition-base);
        }

        .footer-bottom a:hover {
            color: var(--brand-neon);
        }

        .footer-bottom p {
            margin: 0;
        }

        @media (max-width: 1024px) {
            .resource-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .steps-grid {
                grid-template-columns: repeat(3, 1fr);
                gap: 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }

            .category-hero h1 {
                font-size: 34px;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
            }

            .nav-cta {
                display: none;
            }

            .mobile-toggle {
                display: flex;
            }

            .category-hero {
                padding: 36px 0 28px;
            }

            .category-hero h1 {
                font-size: 26px;
                line-height: 1.4;
            }

            .resource-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .steps-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }

            .featured-item {
                flex-wrap: wrap;
                gap: 12px;
                padding: 14px 16px;
            }

            .filter-bar {
                flex-direction: column;
                align-items: flex-start;
                padding: 14px 16px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 8px;
            }

            .section-heading h2 {
                font-size: 22px;
            }

            .bottom-cta-bar {
                padding: 10px 16px;
                gap: 8px;
            }

            .bottom-cta-bar .cta-text {
                font-size: 12px;
                text-align: center;
            }

            .btn-primary-circle,
            .btn-outline-light {
                padding: 8px 16px;
                font-size: 12px;
            }
        }

        @media (max-width: 520px) {
            .container-site {
                padding-left: 16px;
                padding-right: 16px;
            }

            .category-hero h1 {
                font-size: 22px;
            }

            .category-hero .hero-desc {
                font-size: 14px;
            }

            .steps-section {
                padding: 24px 16px;
            }

            .filter-chip {
                padding: 5px 10px;
                font-size: 12px;
            }

            .pagination a,
            .pagination button {
                min-width: 34px;
                height: 34px;
                font-size: 12px;
            }
        }