/* roulang page: index */
:root {
            --primary: #0b1a3b;
            --primary-light: #132852;
            --primary-lighter: #1c3570;
            --accent: #c4913a;
            --accent-light: #d9a84f;
            --accent-dark: #a8772e;
            --bg: #ffffff;
            --bg-alt: #f4f5f7;
            --bg-dark: #0b1a3b;
            --bg-card: #ffffff;
            --text: #1a1a2e;
            --text-heading: #0d1528;
            --text-muted: #6b7280;
            --text-light: #9ca3af;
            --border: #e5e7eb;
            --border-light: #f0f1f3;
            --radius-xs: 6px;
            --radius-sm: 10px;
            --radius: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow: 0 2px 16px rgba(0, 0, 0, 0.07);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.10);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.13);
            --shadow-xl: 0 20px 56px rgba(0, 0, 0, 0.16);
            --transition-fast: 0.18s ease;
            --transition: 0.28s ease;
            --transition-slow: 0.4s ease;
            --font-stack: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --container-max: 1240px;
            --container-narrow: 960px;
            --nav-height: 68px;
        }

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

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

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background-color: var(--bg);
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
            background: none;
        }
        input {
            font-family: inherit;
            outline: none;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            color: var(--text-heading);
            font-weight: 700;
        }
        h1 {
            font-size: 2.8rem;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 2.1rem;
            letter-spacing: -0.01em;
        }
        h3 {
            font-size: 1.35rem;
        }
        h4 {
            font-size: 1.15rem;
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .container--narrow {
            max-width: var(--container-narrow);
        }

        .section {
            padding: 80px 0;
        }
        .section--alt {
            background-color: var(--bg-alt);
        }
        .section--dark {
            background-color: var(--bg-dark);
            color: #e0e4ec;
        }
        .section--dark h2,
        .section--dark h3,
        .section--dark .text-heading {
            color: #ffffff;
        }
        .section--dark .text-muted {
            color: #b0b8c8;
        }
        .section__header {
            text-align: center;
            margin-bottom: 52px;
        }
        .section__header h2 {
            margin-bottom: 14px;
        }
        .section__header .section__subtitle {
            color: var(--text-muted);
            font-size: 1.08rem;
            max-width: 620px;
            margin: 0 auto;
            line-height: 1.65;
        }
        .section__tag {
            display: inline-block;
            background-color: rgba(196, 145, 58, 0.1);
            color: var(--accent-dark);
            font-weight: 600;
            font-size: 0.85rem;
            padding: 6px 16px;
            border-radius: 50px;
            margin-bottom: 12px;
            letter-spacing: 0.03em;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 12px 26px;
            border-radius: 50px;
            transition: all var(--transition);
            white-space: nowrap;
            letter-spacing: 0.01em;
            position: relative;
            overflow: hidden;
        }
        .btn--primary {
            background-color: var(--accent);
            color: #fff;
            box-shadow: 0 4px 16px rgba(196, 145, 58, 0.3);
        }
        .btn--primary:hover {
            background-color: var(--accent-light);
            box-shadow: 0 8px 24px rgba(196, 145, 58, 0.4);
            transform: translateY(-2px);
        }
        .btn--primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(196, 145, 58, 0.3);
        }
        .btn--outline {
            background-color: transparent;
            border: 2px solid var(--border);
            color: var(--text);
        }
        .btn--outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            background-color: rgba(196, 145, 58, 0.04);
        }
        .btn--light {
            background-color: #fff;
            color: var(--primary);
            box-shadow: var(--shadow-sm);
        }
        .btn--light:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .btn--lg {
            padding: 15px 34px;
            font-size: 1.05rem;
            border-radius: 56px;
        }
        .btn--sm {
            padding: 8px 18px;
            font-size: 0.85rem;
            border-radius: 40px;
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }
        .card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
            border-color: transparent;
        }
        .card__image {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .card__body {
            padding: 22px 20px 24px;
        }
        .card__body h3 {
            margin-bottom: 8px;
            font-size: 1.18rem;
        }
        .card__body p {
            color: var(--text-muted);
            font-size: 0.93rem;
            line-height: 1.6;
        }
        .card__tag {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent-dark);
            background: rgba(196, 145, 58, 0.08);
            padding: 4px 12px;
            border-radius: 50px;
            margin-bottom: 10px;
        }

        .stat-card {
            text-align: center;
            padding: 28px 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .stat-card__number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--accent);
            letter-spacing: -0.02em;
            line-height: 1.1;
        }
        .stat-card__label {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-top: 6px;
        }

        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
            height: var(--nav-height);
            display: flex;
            align-items: center;
            transition: all var(--transition);
        }
        .header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .header__logo {
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
            flex-shrink: 0;
        }
        .header__logo i {
            color: var(--accent);
            font-size: 1.5rem;
        }
        .header__nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .header__nav a {
            padding: 10px 16px;
            font-size: 0.93rem;
            font-weight: 500;
            color: var(--text);
            border-radius: 8px;
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }
        .header__nav a:hover {
            color: var(--accent);
            background-color: rgba(196, 145, 58, 0.05);
        }
        .header__nav a.active {
            color: var(--accent);
            font-weight: 700;
            background-color: rgba(196, 145, 58, 0.08);
        }
        .header__nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent);
            border-radius: 4px;
        }
        .header__cta {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .header__burger {
            display: none;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--text);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        .header__burger:hover {
            background-color: var(--bg-alt);
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            bottom: 0;
            background: #fff;
            z-index: 999;
            flex-direction: column;
            padding: 20px 24px;
            gap: 4px;
            overflow-y: auto;
        }
        .mobile-nav.active {
            display: flex;
        }
        .mobile-nav a {
            display: block;
            padding: 14px 18px;
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }
        .mobile-nav a:hover,
        .mobile-nav a.active {
            color: var(--accent);
            background-color: rgba(196, 145, 58, 0.06);
            font-weight: 700;
        }

        .hero {
            display: flex;
            min-height: 560px;
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .hero__content {
            flex: 1 1 50%;
            display: flex;
            align-items: center;
            padding: 60px 48px 60px 48px;
            z-index: 2;
            background: var(--bg-dark);
        }
        .hero__content-inner {
            max-width: 560px;
        }
        .hero__content h1 {
            color: #ffffff;
            font-size: 3rem;
            font-weight: 800;
            margin-bottom: 18px;
            letter-spacing: -0.025em;
            line-height: 1.18;
        }
        .hero__content h1 span {
            color: var(--accent-light);
        }
        .hero__content .hero__desc {
            color: #c4ccda;
            font-size: 1.08rem;
            line-height: 1.7;
            margin-bottom: 30px;
            max-width: 480px;
        }
        .hero__content .btn {
            margin-right: 10px;
        }
        .hero__visual {
            flex: 1 1 50%;
            background-image: url('assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            position: relative;
            min-height: 400px;
        }
        .hero__visual::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to right, rgba(11, 26, 59, 0.55) 0%, rgba(11, 26, 59, 0.05) 60%, transparent 100%);
            pointer-events: none;
        }

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

        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .advantage-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 26px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            text-align: center;
        }
        .advantage-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: transparent;
        }
        .advantage-card__icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: rgba(196, 145, 58, 0.1);
            color: var(--accent);
            font-size: 1.5rem;
            margin-bottom: 18px;
            transition: all var(--transition);
        }
        .advantage-card:hover .advantage-card__icon {
            background: var(--accent);
            color: #fff;
            transform: scale(1.08);
        }
        .advantage-card h3 {
            margin-bottom: 10px;
        }
        .advantage-card p {
            color: var(--text-muted);
            font-size: 0.93rem;
            line-height: 1.6;
        }

        .story-block {
            display: flex;
            align-items: center;
            gap: 48px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-light);
        }
        .story-block__image {
            flex: 1 1 45%;
            min-height: 400px;
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .story-block__text {
            flex: 1 1 55%;
            padding: 44px 40px;
        }
        .story-block__text h2 {
            margin-bottom: 14px;
        }
        .story-block__text p {
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 12px;
            font-size: 0.98rem;
        }

        .services-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .service-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .service-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }
        .service-card__image {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
            display: block;
        }
        .service-card__body {
            padding: 18px 16px 20px;
        }
        .service-card__body h4 {
            margin-bottom: 6px;
            font-size: 1.02rem;
        }
        .service-card__body p {
            color: var(--text-muted);
            font-size: 0.85rem;
            line-height: 1.55;
        }

        .partners-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 32px 48px;
            padding: 20px 0;
        }
        .partner-item {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-muted);
            letter-spacing: 0.03em;
            opacity: 0.7;
            transition: all var(--transition-fast);
        }
        .partner-item:hover {
            opacity: 1;
            color: var(--text);
        }

        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .testimonial-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 26px 22px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            position: relative;
            transition: all var(--transition);
        }
        .testimonial-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .testimonial-card__quote {
            font-size: 2rem;
            color: var(--accent);
            opacity: 0.5;
            line-height: 1;
            margin-bottom: 8px;
        }
        .testimonial-card__text {
            color: var(--text);
            line-height: 1.7;
            font-size: 0.95rem;
            margin-bottom: 14px;
        }
        .testimonial-card__author {
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--text-heading);
        }
        .testimonial-card__role {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 2px;
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
            cursor: pointer;
        }
        .faq-item:hover {
            box-shadow: var(--shadow);
        }
        .faq-item__question {
            padding: 18px 22px;
            font-weight: 700;
            font-size: 1.02rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: var(--text-heading);
            user-select: none;
        }
        .faq-item__question i {
            transition: transform var(--transition);
            color: var(--accent);
            font-size: 0.9rem;
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-item.open .faq-item__question i {
            transform: rotate(180deg);
        }
        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition);
            padding: 0 22px;
            color: var(--text-muted);
            font-size: 0.93rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-item__answer {
            max-height: 500px;
            padding: 0 22px 20px;
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 22px;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
        }
        .news-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .news-card__image {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .news-card__body {
            padding: 18px 16px 20px;
        }
        .news-card__date {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 6px;
        }
        .news-card__body h4 {
            font-size: 1rem;
            margin-bottom: 6px;
            line-height: 1.4;
        }
        .news-card__body p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.55;
            margin-bottom: 12px;
        }
        .news-card__link {
            font-weight: 700;
            font-size: 0.88rem;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap var(--transition-fast);
        }
        .news-card__link:hover {
            gap: 8px;
        }

        .cta-block {
            background-image: url('assets/images/backpic/back-3.webp');
            background-size: cover;
            background-position: center;
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(11, 26, 59, 0.78);
            z-index: 1;
            border-radius: var(--radius-lg);
        }
        .cta-block>* {
            position: relative;
            z-index: 2;
        }
        .cta-block h2 {
            color: #fff;
            margin-bottom: 12px;
        }
        .cta-block p {
            color: #c4ccda;
            margin-bottom: 24px;
            font-size: 1.05rem;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        .footer {
            background-color: #060e1f;
            color: #b0b8c8;
            padding: 56px 0 32px;
        }
        .footer__grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        .footer__brand {
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 10px;
        }
        .footer__desc {
            font-size: 0.9rem;
            line-height: 1.6;
            color: #8892a6;
            max-width: 300px;
        }
        .footer h4 {
            color: #fff;
            margin-bottom: 14px;
            font-size: 0.95rem;
        }
        .footer ul li {
            margin-bottom: 8px;
        }
        .footer ul li a {
            color: #8892a6;
            font-size: 0.88rem;
            transition: color var(--transition-fast);
        }
        .footer ul li a:hover {
            color: #fff;
        }
        .footer__bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 22px;
            text-align: center;
            font-size: 0.84rem;
            color: #667085;
        }

        @media (max-width: 1024px) {
            h1 {
                font-size: 2.3rem;
            }
            h2 {
                font-size: 1.75rem;
            }
            .hero {
                flex-direction: column;
            }
            .hero__content {
                flex: 1 1 auto;
                padding: 44px 32px;
            }
            .hero__visual {
                flex: 1 1 auto;
                min-height: 320px;
            }
            .hero__visual::after {
                background: linear-gradient(to bottom, rgba(11, 26, 59, 0.5) 0%, rgba(11, 26, 59, 0.05) 50%, transparent 100%);
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .advantages-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .story-block {
                flex-direction: column;
            }
            .story-block__image {
                min-height: 280px;
                width: 100%;
            }
            .story-block__text {
                padding: 28px 24px;
            }
            .services-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .testimonials-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer__grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 1.9rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .header__nav {
                display: none;
            }
            .header__cta {
                display: none;
            }
            .header__burger {
                display: flex;
            }
            .section {
                padding: 52px 0;
            }
            .hero {
                min-height: auto;
            }
            .hero__content {
                padding: 36px 20px;
            }
            .hero__content h1 {
                font-size: 2rem;
            }
            .hero__visual {
                min-height: 250px;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-card__number {
                font-size: 2rem;
            }
            .advantages-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .services-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .testimonials-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .news-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .cta-block {
                padding: 40px 20px;
                border-radius: var(--radius);
            }
            .cta-block::before {
                border-radius: var(--radius);
            }
            .footer__grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .partners-row {
                gap: 20px;
            }
        }

        @media (max-width: 520px) {
            h1 {
                font-size: 1.6rem;
            }
            h2 {
                font-size: 1.3rem;
            }
            .container {
                padding-left: 14px;
                padding-right: 14px;
            }
            .section {
                padding: 38px 0;
            }
            .hero__content {
                padding: 28px 14px;
            }
            .hero__content h1 {
                font-size: 1.65rem;
            }
            .hero__visual {
                min-height: 200px;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-card {
                padding: 18px 12px;
            }
            .stat-card__number {
                font-size: 1.6rem;
            }
            .stat-card__label {
                font-size: 0.8rem;
            }
            .services-grid {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .story-block__text {
                padding: 20px 16px;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .btn--lg {
                padding: 12px 22px;
                font-size: 0.9rem;
            }
            .header__logo {
                font-size: 1.2rem;
            }
        }

        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .animate-on-scroll {
            animation: fadeInUp 0.6s ease both;
        }

/* roulang page: category3 */
:root {
            --color-primary: #1a56db;
            --color-primary-dark: #1240a8;
            --color-primary-light: #e8effd;
            --color-accent: #f59e0b;
            --color-accent-dark: #d97706;
            --color-accent-light: #fef3c7;
            --color-dark: #0f172a;
            --color-dark-secondary: #1e293b;
            --color-bg: #f8fafc;
            --color-bg-alt: #f1f5f9;
            --color-white: #ffffff;
            --color-text: #1e293b;
            --color-text-secondary: #475569;
            --color-muted: #64748b;
            --color-light-muted: #94a3b8;
            --color-border: #e2e8f0;
            --color-border-light: #f1f5f9;
            --color-success: #10b981;
            --color-danger: #ef4444;
            --radius-sm: 6px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --radius-full: 50%;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
            --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.1);
            --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.12);
            --shadow-xl: 0 24px 64px rgba(0, 0, 0, 0.16);
            --transition-fast: 0.15s ease;
            --transition: 0.25s ease;
            --transition-slow: 0.35s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-height: 68px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing: 24px;
            --spacing-md: 32px;
            --spacing-lg: 48px;
            --spacing-xl: 64px;
            --spacing-2xl: 80px;
            --spacing-3xl: 100px;
            --section-padding: 80px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            text-rendering: optimizeLegibility;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            overflow-x: hidden;
        }

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

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        ul {
            list-style: none;
        }

        input {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing);
        }

        /* ========== HEADER / NAVIGATION ========== */
        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            height: var(--header-height);
            box-shadow: var(--shadow-sm);
            transition: box-shadow var(--transition);
        }

        .header--scrolled {
            box-shadow: var(--shadow-md);
        }

        .header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing);
            gap: var(--spacing-sm);
        }

        .header__logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--color-dark);
            white-space: nowrap;
            flex-shrink: 0;
            letter-spacing: -0.3px;
            transition: color var(--transition);
        }
        .header__logo i {
            font-size: 1.5rem;
            color: var(--color-primary);
            transition: transform var(--transition);
        }
        .header__logo:hover {
            color: var(--color-primary);
        }
        .header__logo:hover i {
            transform: scale(1.1);
        }

        .header__nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
        }
        .header__nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            white-space: nowrap;
            transition: all var(--transition);
            position: relative;
        }
        .header__nav a:hover {
            color: var(--color-primary);
            background: var(--color-primary-light);
        }
        .header__nav a.active {
            color: var(--color-primary);
            background: var(--color-primary-light);
            font-weight: 600;
        }
        .header__nav a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--color-primary);
            border-radius: 3px;
        }

        .header__cta {
            flex-shrink: 0;
        }

        .header__burger {
            display: none;
            font-size: 1.4rem;
            color: var(--color-dark);
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            flex-shrink: 0;
        }
        .header__burger:hover {
            background: var(--color-bg-alt);
            color: var(--color-primary);
        }

        /* ========== BUTTONS ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-weight: 600;
            border-radius: var(--radius);
            cursor: pointer;
            transition: all var(--transition);
            white-space: nowrap;
            letter-spacing: 0.2px;
            font-size: 0.95rem;
            padding: 12px 24px;
            line-height: 1.3;
            text-align: center;
            border: 2px solid transparent;
        }
        .btn--primary {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
            box-shadow: 0 4px 14px rgba(26, 86, 219, 0.3);
        }
        .btn--primary:hover {
            background: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
            box-shadow: 0 6px 20px rgba(26, 86, 219, 0.4);
            transform: translateY(-2px);
        }
        .btn--primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(26, 86, 219, 0.25);
        }
        .btn--accent {
            background: var(--color-accent);
            color: #fff;
            border-color: var(--color-accent);
            box-shadow: 0 4px 14px rgba(245, 158, 11, 0.3);
        }
        .btn--accent:hover {
            background: var(--color-accent-dark);
            border-color: var(--color-accent-dark);
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.4);
            transform: translateY(-2px);
        }
        .btn--outline {
            background: transparent;
            color: var(--color-primary);
            border-color: var(--color-primary);
        }
        .btn--outline:hover {
            background: var(--color-primary);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(26, 86, 219, 0.3);
        }
        .btn--sm {
            padding: 8px 16px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }
        .btn--lg {
            padding: 16px 36px;
            font-size: 1.1rem;
            border-radius: var(--radius-lg);
        }
        .btn:focus-visible {
            outline: 3px solid var(--color-primary);
            outline-offset: 3px;
        }

        /* ========== BADGE / TAG ========== */
        .badge {
            display: inline-flex;
            align-items: center;
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            white-space: nowrap;
        }
        .badge--primary {
            background: var(--color-primary-light);
            color: var(--color-primary);
        }
        .badge--accent {
            background: var(--color-accent-light);
            color: var(--color-accent-dark);
        }
        .badge--success {
            background: #d1fae5;
            color: #059669;
        }
        .badge--hot {
            background: #fee2e2;
            color: #dc2626;
        }

        /* ========== SECTION TITLES ========== */
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-primary);
            text-transform: uppercase;
            letter-spacing: 1.5px;
            margin-bottom: var(--spacing-xs);
        }
        .section-label::before {
            content: '';
            width: 8px;
            height: 8px;
            border-radius: var(--radius-full);
            background: var(--color-primary);
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.5px;
            line-height: 1.3;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--color-muted);
            max-width: 600px;
        }

        /* ========== PAGE BANNER ========== */
        .page-banner {
            position: relative;
            background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 40%, #1a3a6e 100%);
            min-height: 360px;
            display: flex;
            align-items: center;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.25;
            z-index: 0;
        }
        .page-banner__overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(26, 86, 219, 0.2) 0%, transparent 70%),
                radial-gradient(ellipse at 70% 50%, rgba(245, 158, 11, 0.15) 0%, transparent 60%);
            z-index: 0;
        }
        .page-banner__content {
            position: relative;
            z-index: 1;
            padding: var(--spacing-2xl) 0;
        }
        .page-banner__breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: var(--spacing);
            flex-wrap: wrap;
        }
        .page-banner__breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            transition: color var(--transition);
        }
        .page-banner__breadcrumb a:hover {
            color: #fff;
            text-decoration: underline;
        }
        .page-banner__breadcrumb span {
            color: rgba(255, 255, 255, 0.55);
        }
        .page-banner__breadcrumb .current {
            color: #fff;
            font-weight: 500;
        }
        .page-banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.8px;
            line-height: 1.2;
            margin-bottom: var(--spacing-sm);
        }
        .page-banner__desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            max-width: 620px;
            line-height: 1.8;
        }

        /* ========== CATEGORY GRID ========== */
        .category-section {
            padding: var(--section-padding) 0;
        }
        .category-section--alt {
            background: var(--color-white);
        }
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing);
        }
        .category-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            padding: var(--spacing-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
            position: relative;
            overflow: hidden;
        }
        .category-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: var(--color-primary-light);
        }
        .category-card__icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            flex-shrink: 0;
        }
        .category-card__icon--blue {
            background: #e8effd;
            color: #1a56db;
        }
        .category-card__icon--amber {
            background: #fef3c7;
            color: #f59e0b;
        }
        .category-card__icon--green {
            background: #d1fae5;
            color: #10b981;
        }
        .category-card__icon--purple {
            background: #ede9fe;
            color: #7c3aed;
        }
        .category-card__icon--rose {
            background: #ffe4e6;
            color: #e11d48;
        }
        .category-card__icon--cyan {
            background: #cffafe;
            color: #0891b2;
        }
        .category-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--color-dark);
            letter-spacing: -0.2px;
        }
        .category-card p {
            font-size: 0.92rem;
            color: var(--color-muted);
            line-height: 1.7;
        }
        .category-card__link {
            margin-top: auto;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition);
        }
        .category-card__link:hover {
            gap: 10px;
            color: var(--color-primary-dark);
        }

        /* ========== FEATURED GAMES ========== */
        .games-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing);
        }
        .game-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
        }
        .game-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
            border-color: var(--color-primary-light);
        }
        .game-card__img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
        }
        .game-card__body {
            padding: var(--spacing-sm);
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }
        .game-card__tags {
            display: flex;
            gap: 6px;
            flex-wrap: wrap;
        }
        .game-card h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-dark);
            line-height: 1.4;
        }
        .game-card__rating {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            color: var(--color-accent);
        }
        .game-card__rating span {
            color: var(--color-muted);
        }

        /* ========== STATS ROW ========== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing);
        }
        .stat-card {
            background: var(--color-white);
            border-radius: var(--radius-lg);
            padding: var(--spacing-md);
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .stat-card__number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: -1px;
            line-height: 1;
        }
        .stat-card__label {
            font-size: 0.9rem;
            color: var(--color-muted);
            margin-top: 8px;
        }

        /* ========== FEATURES LIST ========== */
        .features-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: var(--spacing);
        }
        .feature-item {
            display: flex;
            gap: var(--spacing-sm);
            padding: var(--spacing);
            background: var(--color-white);
            border-radius: var(--radius);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition);
            align-items: flex-start;
        }
        .feature-item:hover {
            box-shadow: var(--shadow);
            border-color: var(--color-primary-light);
        }
        .feature-item__icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            flex-shrink: 0;
            background: var(--color-primary-light);
            color: var(--color-primary);
        }
        .feature-item h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-dark);
            margin-bottom: 4px;
        }
        .feature-item p {
            font-size: 0.88rem;
            color: var(--color-muted);
            line-height: 1.6;
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: var(--section-padding) 0;
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .faq-item {
            background: var(--color-white);
            border-radius: var(--radius);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--color-primary-light);
            box-shadow: var(--shadow-sm);
        }
        .faq-item__question {
            width: 100%;
            text-align: left;
            padding: var(--spacing);
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-dark);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: var(--spacing-sm);
            cursor: pointer;
            transition: color var(--transition);
            background: none;
            border: none;
        }
        .faq-item__question:hover {
            color: var(--color-primary);
        }
        .faq-item__question i {
            font-size: 0.85rem;
            color: var(--color-muted);
            transition: transform var(--transition);
        }
        .faq-item--open .faq-item__question i {
            transform: rotate(180deg);
            color: var(--color-primary);
        }
        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition);
        }
        .faq-item--open .faq-item__answer {
            max-height: 400px;
        }
        .faq-item__answer-inner {
            padding: 0 var(--spacing) var(--spacing);
            font-size: 0.92rem;
            color: var(--color-text-secondary);
            line-height: 1.8;
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: var(--section-padding) 0;
            background: linear-gradient(135deg, #0f172a 0%, #1a3a6e 60%, #1a56db 100%);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 20% 50%, rgba(245, 158, 11, 0.15) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 50%, rgba(26, 86, 219, 0.2) 0%, transparent 55%);
            z-index: 1;
        }
        .cta-section__content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 680px;
            margin: 0 auto;
        }
        .cta-section h2 {
            font-size: 2.4rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.6px;
            margin-bottom: var(--spacing-sm);
            line-height: 1.3;
        }
        .cta-section p {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.8);
            margin-bottom: var(--spacing-md);
            line-height: 1.7;
        }
        .cta-section__actions {
            display: flex;
            gap: var(--spacing-sm);
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ========== FOOTER ========== */
        .footer {
            background: var(--color-dark);
            color: #cbd5e1;
            padding: var(--spacing-xl) 0 var(--spacing-md);
            margin-top: auto;
        }
        .footer__grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-lg);
        }
        .footer__brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: var(--spacing-sm);
            letter-spacing: -0.3px;
        }
        .footer__desc {
            font-size: 0.88rem;
            color: #94a3b8;
            line-height: 1.7;
        }
        .footer h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.2px;
        }
        .footer ul {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .footer ul li a {
            font-size: 0.88rem;
            color: #94a3b8;
            transition: color var(--transition);
        }
        .footer ul li a:hover {
            color: #fff;
        }
        .footer__bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: var(--spacing);
            font-size: 0.82rem;
            color: #64748b;
            text-align: center;
        }

        /* ========== MOBILE NAV DRAWER ========== */
        .mobile-drawer {
            position: fixed;
            top: 0;
            right: -320px;
            width: 300px;
            height: 100vh;
            background: var(--color-white);
            z-index: 2000;
            padding: var(--spacing);
            box-shadow: var(--shadow-xl);
            transition: right var(--transition-slow);
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .mobile-drawer--open {
            right: 0;
        }
        .mobile-drawer__backdrop {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.5);
            z-index: 1999;
            opacity: 0;
            pointer-events: none;
            transition: opacity var(--transition-slow);
        }
        .mobile-drawer__backdrop--visible {
            opacity: 1;
            pointer-events: auto;
        }
        .mobile-drawer__close {
            align-self: flex-end;
            font-size: 1.3rem;
            color: var(--color-muted);
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }
        .mobile-drawer__close:hover {
            background: var(--color-bg-alt);
            color: var(--color-dark);
        }
        .mobile-drawer a {
            display: block;
            padding: 12px 16px;
            font-size: 1rem;
            font-weight: 500;
            color: var(--color-text);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }
        .mobile-drawer a:hover,
        .mobile-drawer a.active {
            background: var(--color-primary-light);
            color: var(--color-primary);
        }
        .mobile-drawer .btn {
            margin-top: auto;
            width: 100%;
            justify-content: center;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .header__nav {
                gap: 0;
            }
            .header__nav a {
                padding: 8px 10px;
                font-size: 0.82rem;
            }
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .games-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .features-list {
                grid-template-columns: 1fr;
            }
            .footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: var(--spacing);
            }
            .page-banner h1 {
                font-size: 2.2rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            :root {
                --section-padding: 60px;
            }
        }

        @media (max-width: 768px) {
            .header__nav {
                display: none;
            }
            .header__cta {
                display: none;
            }
            .header__burger {
                display: flex;
                align-items: center;
                justify-content: center;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .games-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing-sm);
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: var(--spacing-sm);
            }
            .features-list {
                grid-template-columns: 1fr;
            }
            .footer__grid {
                grid-template-columns: 1fr;
                gap: var(--spacing);
            }
            .page-banner {
                min-height: 280px;
            }
            .page-banner h1 {
                font-size: 1.8rem;
            }
            .page-banner__desc {
                font-size: 0.95rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .cta-section h2 {
                font-size: 1.7rem;
            }
            .stat-card__number {
                font-size: 2rem;
            }
            :root {
                --section-padding: 48px;
                --header-height: 60px;
            }
        }

        @media (max-width: 520px) {
            .games-grid {
                grid-template-columns: 1fr;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
            }
            .page-banner h1 {
                font-size: 1.5rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .btn--lg {
                padding: 14px 24px;
                font-size: 1rem;
            }
            .cta-section h2 {
                font-size: 1.4rem;
            }
            .faq-item__question {
                font-size: 0.9rem;
            }
            :root {
                --section-padding: 36px;
            }
        }

/* roulang page: category2 */
:root {
            --color-primary: #5b3cc4;
            --color-primary-light: #7c5fe0;
            --color-primary-dark: #3f2696;
            --color-accent: #ff6b35;
            --color-accent-light: #ff8c60;
            --color-accent-glow: rgba(255, 107, 53, 0.3);
            --color-teal: #00cec9;
            --color-teal-glow: rgba(0, 206, 201, 0.25);
            --color-bg: #0d0d1a;
            --color-bg-alt: #111128;
            --color-bg-card: #16162a;
            --color-bg-card-hover: #1c1c38;
            --color-bg-elevated: #1a1a35;
            --color-surface: #1e1e3a;
            --color-border: #2a2a45;
            --color-border-light: #353558;
            --color-text: #f0f0f5;
            --color-text-secondary: #b8bdd0;
            --color-text-muted: #8892a6;
            --color-text-dim: #6b7288;
            --color-white: #ffffff;
            --color-success: #00d68f;
            --color-warning: #ffaa00;
            --color-error: #ff4757;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --radius-full: 9999px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 6px 20px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 14px 40px rgba(0, 0, 0, 0.5);
            --shadow-glow-primary: 0 0 30px rgba(91, 60, 196, 0.35);
            --shadow-glow-accent: 0 0 25px rgba(255, 107, 53, 0.3);
            --shadow-glow-teal: 0 0 25px rgba(0, 206, 201, 0.25);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            --container-max: 1240px;
            --container-narrow: 960px;
            --header-height: 68px;
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: var(--header-height);
            -webkit-text-size-adjust: 100%;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            min-height: 100vh;
            overflow-x: hidden;
            letter-spacing: 0.01em;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition-fast);
        }
        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
            font-size: inherit;
            color: inherit;
        }
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.3;
            font-weight: 700;
            color: var(--color-white);
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .container--narrow {
            max-width: var(--container-narrow);
        }

        /* ========== HEADER / NAV ========== */
        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(13, 13, 26, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--color-border);
            height: var(--header-height);
            transition: background var(--transition-base), border-color var(--transition-base);
        }
        .header--scrolled {
            background: rgba(13, 13, 26, 0.96);
            border-bottom-color: var(--color-border-light);
            box-shadow: var(--shadow-md);
        }
        .header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            gap: 24px;
        }
        .header__logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--color-white);
            letter-spacing: 0.03em;
            white-space: nowrap;
            transition: color var(--transition-fast), transform var(--transition-fast);
        }
        .header__logo i {
            color: var(--color-accent);
            font-size: 1.5rem;
            transition: transform var(--transition-base);
        }
        .header__logo:hover {
            color: var(--color-accent-light);
        }
        .header__logo:hover i {
            transform: rotate(-10deg) scale(1.1);
        }
        .header__nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-wrap: nowrap;
        }
        .header__nav a {
            display: inline-block;
            padding: 8px 16px;
            border-radius: var(--radius-full);
            font-size: 0.93rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            letter-spacing: 0.02em;
            white-space: nowrap;
            transition: all var(--transition-fast);
            position: relative;
        }
        .header__nav a:hover {
            color: var(--color-white);
            background: rgba(255, 255, 255, 0.05);
        }
        .header__nav a.active {
            color: var(--color-white);
            background: var(--color-primary);
            font-weight: 600;
            box-shadow: var(--shadow-glow-primary);
        }
        .header__cta .btn--sm {
            padding: 9px 20px;
            font-size: 0.9rem;
            font-weight: 600;
            letter-spacing: 0.03em;
        }
        .header__burger {
            display: none;
            width: 42px;
            height: 42px;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--color-white);
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
            flex-shrink: 0;
        }
        .header__burger:hover {
            background: rgba(255, 255, 255, 0.08);
        }
        .header__burger:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        /* ========== MOBILE NAV DRAWER ========== */
        .mobile-nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            z-index: 999;
            background: rgba(0, 0, 0, 0.6);
            opacity: 0;
            transition: opacity var(--transition-base);
        }
        .mobile-nav-overlay--open {
            opacity: 1;
        }
        .mobile-nav-drawer {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            z-index: 1001;
            width: 300px;
            max-width: 85vw;
            height: 100vh;
            background: var(--color-bg-alt);
            border-left: 1px solid var(--color-border);
            padding: 20px;
            transform: translateX(100%);
            transition: transform var(--transition-slow);
            overflow-y: auto;
        }
        .mobile-nav-drawer--open {
            transform: translateX(0);
        }
        .mobile-nav-drawer__close {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            font-size: 1.3rem;
            color: var(--color-white);
            border-radius: var(--radius-sm);
            margin-bottom: 20px;
            transition: background var(--transition-fast);
        }
        .mobile-nav-drawer__close:hover {
            background: rgba(255, 255, 255, 0.08);
        }
        .mobile-nav-drawer a {
            display: block;
            padding: 13px 16px;
            border-radius: var(--radius-md);
            font-size: 1rem;
            font-weight: 500;
            color: var(--color-text-secondary);
            transition: all var(--transition-fast);
            margin-bottom: 4px;
        }
        .mobile-nav-drawer a:hover {
            color: var(--color-white);
            background: rgba(255, 255, 255, 0.05);
        }
        .mobile-nav-drawer a.active {
            color: var(--color-white);
            background: var(--color-primary);
            font-weight: 600;
            box-shadow: var(--shadow-glow-primary);
        }
        .mobile-nav-drawer__cta {
            margin-top: 16px;
            padding: 13px 20px;
            text-align: center;
            font-weight: 600;
            border-radius: var(--radius-md);
            background: var(--color-accent);
            color: var(--color-white);
            display: block;
            transition: all var(--transition-fast);
        }
        .mobile-nav-drawer__cta:hover {
            background: var(--color-accent-light);
            box-shadow: var(--shadow-glow-accent);
        }

        /* ========== BUTTONS ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: var(--radius-full);
            font-weight: 600;
            letter-spacing: 0.03em;
            transition: all var(--transition-base);
            cursor: pointer;
            border: none;
            font-size: 1rem;
            white-space: nowrap;
            position: relative;
            overflow: hidden;
        }
        .btn:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 3px;
        }
        .btn--primary {
            background: var(--color-primary);
            color: var(--color-white);
            box-shadow: 0 4px 16px rgba(91, 60, 196, 0.35);
        }
        .btn--primary:hover {
            background: var(--color-primary-light);
            box-shadow: var(--shadow-glow-primary);
            transform: translateY(-2px);
        }
        .btn--primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(91, 60, 196, 0.3);
        }
        .btn--accent {
            background: var(--color-accent);
            color: var(--color-white);
            box-shadow: 0 4px 16px rgba(255, 107, 53, 0.3);
        }
        .btn--accent:hover {
            background: var(--color-accent-light);
            box-shadow: var(--shadow-glow-accent);
            transform: translateY(-2px);
        }
        .btn--accent:active {
            transform: translateY(0);
        }
        .btn--outline {
            background: transparent;
            color: var(--color-white);
            border: 2px solid var(--color-border-light);
        }
        .btn--outline:hover {
            border-color: var(--color-primary-light);
            background: rgba(91, 60, 196, 0.1);
            box-shadow: var(--shadow-glow-primary);
            transform: translateY(-2px);
        }
        .btn--sm {
            padding: 8px 18px;
            font-size: 0.88rem;
        }
        .btn--lg {
            padding: 16px 36px;
            font-size: 1.1rem;
        }
        .btn i {
            font-size: 0.95em;
        }

        /* ========== BADGE / TAG ========== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: var(--radius-full);
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            white-space: nowrap;
        }
        .badge--primary {
            background: rgba(91, 60, 196, 0.2);
            color: #b49dff;
            border: 1px solid rgba(91, 60, 196, 0.35);
        }
        .badge--accent {
            background: rgba(255, 107, 53, 0.18);
            color: #ff9f7a;
            border: 1px solid rgba(255, 107, 53, 0.3);
        }
        .badge--teal {
            background: rgba(0, 206, 201, 0.18);
            color: #5ee8e5;
            border: 1px solid rgba(0, 206, 201, 0.3);
        }

        /* ========== SECTION ========== */
        .section {
            padding: 70px 0;
        }
        .section--dark {
            background: var(--color-bg-alt);
        }
        .section--gradient {
            background: linear-gradient(180deg, var(--color-bg) 0%, var(--color-bg-alt) 50%, var(--color-bg) 100%);
        }
        .section__header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section__header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .section__header h2 span {
            color: var(--color-accent);
        }
        .section__header p {
            color: var(--color-text-muted);
            font-size: 1.08rem;
            max-width: 640px;
            margin: 0 auto;
            line-height: 1.8;
        }

        /* ========== BANNER / HERO ========== */
        .banner {
            position: relative;
            padding: 80px 0 70px;
            background: var(--color-bg-alt);
            overflow: hidden;
            border-bottom: 1px solid var(--color-border);
        }
        .banner__bg {
            position: absolute;
            inset: 0;
            background-image: url('assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.14;
            z-index: 0;
        }
        .banner__overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 30%, rgba(91, 60, 196, 0.2) 0%, transparent 60%),
                radial-gradient(ellipse at 30% 60%, rgba(255, 107, 53, 0.12) 0%, transparent 55%),
                linear-gradient(180deg, rgba(13, 13, 26, 0.3) 0%, var(--color-bg-alt) 100%);
            z-index: 1;
        }
        .banner__content {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            gap: 10px;
        }
        .banner__breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--color-text-muted);
            margin-bottom: 4px;
            flex-wrap: wrap;
            justify-content: center;
        }
        .banner__breadcrumb a {
            color: var(--color-text-secondary);
            transition: color var(--transition-fast);
        }
        .banner__breadcrumb a:hover {
            color: var(--color-accent);
        }
        .banner__breadcrumb span {
            color: var(--color-text-dim);
        }
        .banner__breadcrumb .current {
            color: var(--color-accent);
            font-weight: 600;
        }
        .banner h1 {
            font-size: 3rem;
            font-weight: 900;
            letter-spacing: 0.03em;
            line-height: 1.2;
            margin-bottom: 8px;
        }
        .banner h1 span {
            color: var(--color-accent);
        }
        .banner__desc {
            font-size: 1.15rem;
            color: var(--color-text-secondary);
            max-width: 700px;
            margin: 0 auto;
            line-height: 1.8;
        }

        /* ========== CARDS ========== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
            gap: 24px;
        }
        .card-grid--3 {
            grid-template-columns: repeat(3, 1fr);
        }
        .card-grid--4 {
            grid-template-columns: repeat(4, 1fr);
        }
        .card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent), var(--color-teal));
            opacity: 0;
            transition: opacity var(--transition-base);
            border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        }
        .card:hover {
            background: var(--color-bg-card-hover);
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .card:hover::before {
            opacity: 1;
        }
        .card__icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            flex-shrink: 0;
        }
        .card__icon--purple {
            background: rgba(91, 60, 196, 0.2);
            color: #b49dff;
        }
        .card__icon--orange {
            background: rgba(255, 107, 53, 0.2);
            color: #ff9f7a;
        }
        .card__icon--teal {
            background: rgba(0, 206, 201, 0.2);
            color: #5ee8e5;
        }
        .card__icon--pink {
            background: rgba(253, 121, 168, 0.2);
            color: #fda4c4;
        }
        .card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            letter-spacing: 0.02em;
        }
        .card p {
            color: var(--color-text-muted);
            font-size: 0.95rem;
            line-height: 1.75;
            flex-grow: 1;
        }
        .card__image {
            border-radius: var(--radius-md);
            overflow: hidden;
            margin-bottom: 4px;
        }
        .card__image img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .card:hover .card__image img {
            transform: scale(1.04);
        }

        /* ========== STATS ========== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 30px 20px;
            text-align: center;
            transition: all var(--transition-base);
            position: relative;
        }
        .stat-card:hover {
            background: var(--color-bg-card-hover);
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }
        .stat-card__number {
            font-size: 2.8rem;
            font-weight: 900;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--color-accent), var(--color-primary-light));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 6px;
            line-height: 1.1;
        }
        .stat-card__label {
            font-size: 0.95rem;
            color: var(--color-text-muted);
            font-weight: 500;
            letter-spacing: 0.03em;
        }

        /* ========== TESTIMONIALS ========== */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .testimonial-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-lg);
            padding: 26px 22px;
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .testimonial-card:hover {
            background: var(--color-bg-card-hover);
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .testimonial-card__stars {
            color: #f5a623;
            font-size: 1rem;
            letter-spacing: 2px;
        }
        .testimonial-card__text {
            color: var(--color-text-secondary);
            font-size: 0.95rem;
            line-height: 1.75;
            flex-grow: 1;
            font-style: italic;
        }
        .testimonial-card__author {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--color-white);
        }
        .testimonial-card__author span {
            color: var(--color-text-muted);
            font-weight: 400;
            font-size: 0.82rem;
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
        }
        .faq-item:hover {
            border-color: var(--color-border-light);
        }
        .faq-item__question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            font-weight: 600;
            font-size: 1.02rem;
            color: var(--color-white);
            cursor: pointer;
            text-align: left;
            transition: color var(--transition-fast);
            letter-spacing: 0.02em;
        }
        .faq-item__question:hover {
            color: var(--color-accent);
        }
        .faq-item__question i {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            transition: transform var(--transition-base);
            flex-shrink: 0;
        }
        .faq-item--open .faq-item__question i {
            transform: rotate(180deg);
            color: var(--color-accent);
        }
        .faq-item__answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-base);
        }
        .faq-item--open .faq-item__answer {
            max-height: 400px;
        }
        .faq-item__answer-inner {
            padding: 0 22px 18px;
            color: var(--color-text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 70px 0;
            text-align: center;
            background: var(--color-bg-alt);
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 50%, rgba(91, 60, 196, 0.15) 0%, transparent 70%);
            z-index: 0;
        }
        .cta-section__content {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }
        .cta-section p {
            color: var(--color-text-muted);
            font-size: 1.05rem;
            margin-bottom: 24px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-section .btn-group {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ========== FOOTER ========== */
        .footer {
            background: var(--color-bg);
            border-top: 1px solid var(--color-border);
            padding: 50px 0 28px;
        }
        .footer__grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        .footer__brand {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--color-white);
            margin-bottom: 10px;
            letter-spacing: 0.03em;
        }
        .footer__desc {
            color: var(--color-text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .footer h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }
        .footer ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer ul li a,
        .footer ul li span {
            color: var(--color-text-muted);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
        }
        .footer ul li a:hover {
            color: var(--color-accent);
        }
        .footer__bottom {
            border-top: 1px solid var(--color-border);
            padding-top: 20px;
            text-align: center;
            color: var(--color-text-dim);
            font-size: 0.84rem;
            letter-spacing: 0.03em;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .header__nav {
                gap: 0;
            }
            .header__nav a {
                padding: 8px 11px;
                font-size: 0.84rem;
            }
            .card-grid--4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .card-grid--3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .testimonial-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .banner h1 {
                font-size: 2.4rem;
            }
            .section {
                padding: 50px 0;
            }
            .section__header h2 {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 768px) {
            .header__nav {
                display: none;
            }
            .header__cta {
                display: none;
            }
            .header__burger {
                display: flex;
            }
            .mobile-nav-overlay {
                display: block;
                pointer-events: none;
            }
            .mobile-nav-overlay--open {
                pointer-events: auto;
            }
            .mobile-nav-drawer {
                display: block;
            }
            .card-grid--4,
            .card-grid--3 {
                grid-template-columns: 1fr 1fr;
            }
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer__grid {
                grid-template-columns: 1fr;
                gap: 24px;
                text-align: center;
            }
            .footer ul {
                align-items: center;
            }
            .banner {
                padding: 50px 0 44px;
            }
            .banner h1 {
                font-size: 2rem;
            }
            .banner__desc {
                font-size: 1rem;
            }
            .section {
                padding: 40px 0;
            }
            .section__header h2 {
                font-size: 1.6rem;
            }
            .cta-section h2 {
                font-size: 1.6rem;
            }
            .stat-card__number {
                font-size: 2.2rem;
            }
            .card-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
        }

        @media (max-width: 520px) {
            .card-grid--4,
            .card-grid--3,
            .card-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .banner h1 {
                font-size: 1.6rem;
            }
            .banner {
                padding: 36px 0 32px;
            }
            .section {
                padding: 32px 0;
            }
            .section__header {
                margin-bottom: 28px;
            }
            .section__header h2 {
                font-size: 1.4rem;
            }
            .btn--lg {
                padding: 14px 26px;
                font-size: 1rem;
            }
            .cta-section {
                padding: 40px 0;
            }
            .faq-item__question {
                padding: 14px 16px;
                font-size: 0.95rem;
            }
            .faq-item__answer-inner {
                padding: 0 16px 14px;
                font-size: 0.88rem;
            }
            .container {
                padding: 0 16px;
            }
            .header__inner {
                padding: 0 16px;
            }
            .stat-card {
                padding: 20px 14px;
            }
            .stat-card__number {
                font-size: 1.8rem;
            }
            .card {
                padding: 20px 16px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #5b3cc9;
            --primary-dark: #4629a8;
            --primary-light: #7c5fe0;
            --accent: #f0a030;
            --accent-dark: #d48a1c;
            --accent-light: #f5c060;
            --bg-dark: #0d0f1c;
            --bg-dark-2: #13152a;
            --bg-light: #f8f9fc;
            --bg-white: #ffffff;
            --text-dark: #1e1b38;
            --text-body: #3a3750;
            --text-muted: #8892a6;
            --text-light: #b0b8c8;
            --border: #e2e6f0;
            --border-light: #eef1f7;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.12), 0 4px 12px rgba(0, 0, 0, 0.06);
            --shadow-xl: 0 20px 48px rgba(0, 0, 0, 0.18), 0 8px 20px rgba(0, 0, 0, 0.08);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --radius-full: 50%;
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s ease;
            --font-heading: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-body: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', sans-serif;
            --max-width: 1240px;
            --header-height: 68px;
            --section-gap: 80px;
            --section-gap-sm: 48px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            font-size: 16px;
        }

        body {
            font-family: var(--font-body);
            line-height: 1.7;
            color: var(--text-body);
            background-color: var(--bg-light);
            min-height: 100vh;
            overflow-x: hidden;
        }

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

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            outline: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-family: var(--font-heading);
            color: var(--text-dark);
            line-height: 1.3;
            font-weight: 700;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px;
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 18px;
            }
        }

        /* ========== HEADER ========== */
        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.94);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm);
            height: var(--header-height);
            display: flex;
            align-items: center;
        }

        .header__inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 28px;
            height: 100%;
        }

        .header__logo {
            display: flex;
            align-items: center;
            gap: 9px;
            font-family: var(--font-heading);
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--primary);
            white-space: nowrap;
            transition: color var(--transition-fast);
            letter-spacing: 0.5px;
        }

        .header__logo i {
            font-size: 1.4rem;
            color: var(--accent);
            transition: transform var(--transition-base);
        }

        .header__logo:hover {
            color: var(--primary-dark);
        }

        .header__logo:hover i {
            transform: rotate(-10deg) scale(1.1);
        }

        .header__nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .header__nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-body);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .header__nav a:hover {
            color: var(--primary);
            background: rgba(91, 60, 201, 0.06);
        }

        .header__nav a.active {
            color: var(--primary);
            background: rgba(91, 60, 201, 0.1);
            font-weight: 600;
        }

        .header__cta {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .header__burger {
            display: none;
            font-size: 1.5rem;
            color: var(--text-dark);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
            line-height: 1;
        }

        .header__burger:hover {
            background: rgba(0, 0, 0, 0.05);
        }

        @media (max-width: 1024px) {
            .header__nav {
                gap: 2px;
            }
            .header__nav a {
                padding: 7px 11px;
                font-size: 0.88rem;
            }
        }

        @media (max-width: 768px) {
            .header__nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                flex-direction: column;
                background: #fff;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-lg);
                padding: 12px 18px;
                gap: 4px;
                transform: translateY(-110%);
                opacity: 0;
                pointer-events: none;
                transition: all var(--transition-base);
                z-index: 999;
            }

            .header__nav--open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }

            .header__nav a {
                width: 100%;
                padding: 12px 16px;
                font-size: 0.95rem;
                border-radius: var(--radius-sm);
            }

            .header__cta {
                display: none;
            }

            .header__burger {
                display: block;
            }

            .header__inner {
                padding: 0 16px;
            }
        }

        @media (max-width: 520px) {
            .header__logo {
                font-size: 1.15rem;
                gap: 6px;
            }
            .header__logo i {
                font-size: 1.15rem;
            }
            .header__burger {
                font-size: 1.3rem;
                padding: 5px 8px;
            }
        }

        /* ========== BUTTONS ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-family: var(--font-heading);
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
            padding: 12px 26px;
            transition: all var(--transition-base);
            cursor: pointer;
            border: 2px solid transparent;
            white-space: nowrap;
            letter-spacing: 0.3px;
            line-height: 1.4;
        }

        .btn--primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 14px rgba(91, 60, 201, 0.3);
        }

        .btn--primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            box-shadow: 0 6px 22px rgba(91, 60, 201, 0.4);
            transform: translateY(-1px);
        }

        .btn--primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(91, 60, 201, 0.25);
        }

        .btn--accent {
            background: var(--accent);
            color: #fff;
            border-color: var(--accent);
            box-shadow: 0 4px 14px rgba(240, 160, 48, 0.3);
        }

        .btn--accent:hover {
            background: var(--accent-dark);
            border-color: var(--accent-dark);
            box-shadow: 0 6px 22px rgba(240, 160, 48, 0.4);
            transform: translateY(-1px);
        }

        .btn--outline {
            background: transparent;
            color: var(--primary);
            border-color: var(--primary);
        }

        .btn--outline:hover {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(91, 60, 201, 0.25);
            transform: translateY(-1px);
        }

        .btn--sm {
            padding: 8px 18px;
            font-size: 0.85rem;
            border-radius: 6px;
        }

        .btn--lg {
            padding: 15px 34px;
            font-size: 1.05rem;
            border-radius: var(--radius-md);
        }

        .btn:focus-visible {
            outline: 3px solid rgba(91, 60, 201, 0.35);
            outline-offset: 3px;
        }

        /* ========== BADGE / TAG ========== */
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 0.8rem;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: 20px;
            letter-spacing: 0.4px;
            white-space: nowrap;
        }

        .badge--accent {
            background: rgba(240, 160, 48, 0.12);
            color: #b87818;
        }

        .badge--primary {
            background: rgba(91, 60, 201, 0.1);
            color: var(--primary);
        }

        .badge--success {
            background: rgba(34, 197, 94, 0.1);
            color: #15803d;
        }

        .badge--live {
            background: #ef4444;
            color: #fff;
            animation: pulse-badge 2s infinite;
        }

        @keyframes pulse-badge {
            0%,
            100% {
                opacity: 1;
            }
            50% {
                opacity: 0.7;
            }
        }

        /* ========== BANNER / HERO ========== */
        .banner {
            position: relative;
            min-height: 420px;
            display: flex;
            align-items: center;
            background: var(--bg-dark) url('assets/images/backpic/back-1.webp') center / cover no-repeat;
            overflow: hidden;
        }

        .banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 15, 28, 0.88) 30%, rgba(30, 27, 56, 0.72) 70%, rgba(45, 35, 80, 0.55) 100%);
            z-index: 1;
        }

        .banner__content {
            position: relative;
            z-index: 2;
            color: #fff;
            padding: 70px 0;
            max-width: 700px;
        }

        .banner__badge {
            display: inline-block;
            background: rgba(240, 160, 48, 0.2);
            color: var(--accent-light);
            border: 1px solid rgba(240, 160, 48, 0.35);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.6px;
            margin-bottom: 20px;
        }

        .banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.8px;
            line-height: 1.25;
        }

        .banner h1 span {
            color: var(--accent);
        }

        .banner__desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.75;
            margin-bottom: 28px;
            max-width: 560px;
        }

        .banner__actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        @media (max-width: 768px) {
            .banner {
                min-height: 340px;
            }
            .banner__content {
                padding: 48px 0;
            }
            .banner h1 {
                font-size: 2rem;
            }
            .banner__desc {
                font-size: 1rem;
            }
        }

        @media (max-width: 520px) {
            .banner h1 {
                font-size: 1.55rem;
            }
            .banner__desc {
                font-size: 0.9rem;
            }
            .banner__actions {
                flex-direction: column;
                gap: 10px;
            }
            .banner__actions .btn {
                width: 100%;
                justify-content: center;
            }
        }

        /* ========== SECTION ========== */
        .section {
            padding: var(--section-gap) 0;
        }

        .section--alt {
            background: var(--bg-white);
        }

        .section--dark {
            background: var(--bg-dark);
            color: #fff;
        }

        .section--dark h2,
        .section--dark h3 {
            color: #fff;
        }

        .section__header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section__header h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        .section__header p {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }

        .section--dark .section__header p {
            color: var(--text-light);
        }

        @media (max-width: 768px) {
            .section {
                padding: var(--section-gap-sm) 0;
            }
            .section__header {
                margin-bottom: 32px;
            }
            .section__header h2 {
                font-size: 1.55rem;
            }
            .section__header p {
                font-size: 0.95rem;
            }
        }

        /* ========== CARDS GRID ========== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }

        @media (max-width: 1024px) {
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }

        @media (max-width: 600px) {
            .cards-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
        }

        /* ========== EVENT CARD ========== */
        .event-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            border: 1px solid var(--border-light);
        }

        .event-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-xl);
            border-color: rgba(91, 60, 201, 0.15);
        }

        .event-card__img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
            background: #e8ecf4;
        }

        .event-card__body {
            padding: 22px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .event-card__badge-row {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-bottom: 10px;
        }

        .event-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
            color: var(--text-dark);
        }

        .event-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 14px;
        }

        .event-card__meta {
            display: flex;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .event-card__meta span {
            display: flex;
            align-items: center;
            gap: 5px;
        }

        .event-card__meta i {
            color: var(--primary-light);
            font-size: 0.75rem;
        }

        @media (max-width: 520px) {
            .event-card__body {
                padding: 16px 14px 16px;
            }
            .event-card h3 {
                font-size: 1.05rem;
            }
        }

        /* ========== MATCH LIST ========== */
        .match-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .match-item {
            display: flex;
            align-items: center;
            gap: 18px;
            background: #fff;
            border-radius: var(--radius-md);
            padding: 18px 22px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition-fast);
            flex-wrap: wrap;
        }

        .match-item:hover {
            box-shadow: var(--shadow-md);
            border-color: rgba(91, 60, 201, 0.18);
        }

        .match-item__date {
            flex-shrink: 0;
            text-align: center;
            min-width: 60px;
            background: var(--bg-dark);
            color: #fff;
            border-radius: var(--radius-sm);
            padding: 10px 8px;
            font-weight: 700;
            line-height: 1.3;
            font-size: 0.9rem;
        }

        .match-item__date .day {
            font-size: 1.6rem;
            display: block;
            line-height: 1;
            margin-bottom: 2px;
        }

        .match-item__info {
            flex: 1;
            min-width: 180px;
        }

        .match-item__info h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 4px;
        }

        .match-item__info .game-tag {
            font-size: 0.78rem;
            color: var(--primary);
            font-weight: 500;
        }

        .match-item__prize {
            font-weight: 700;
            color: var(--accent);
            font-size: 1.05rem;
            white-space: nowrap;
        }

        .match-item__status {
            flex-shrink: 0;
        }

        @media (max-width: 600px) {
            .match-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
                padding: 16px;
            }
            .match-item__date {
                min-width: auto;
                display: inline-flex;
                gap: 6px;
                align-items: baseline;
                padding: 6px 14px;
            }
            .match-item__date .day {
                font-size: 1.2rem;
                display: inline;
            }
            .match-item__prize {
                font-size: 0.95rem;
            }
        }

        /* ========== STATS ROW ========== */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }

        .stat-card {
            text-align: center;
            padding: 32px 20px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-lg);
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: all var(--transition-base);
        }

        .stat-card:hover {
            background: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }

        .stat-card__number {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--accent);
            font-family: var(--font-heading);
            line-height: 1;
            margin-bottom: 8px;
            letter-spacing: 1px;
        }

        .stat-card__label {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            font-weight: 500;
        }

        @media (max-width: 768px) {
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 14px;
            }
            .stat-card {
                padding: 24px 14px;
            }
            .stat-card__number {
                font-size: 2rem;
            }
        }

        @media (max-width: 420px) {
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-card__number {
                font-size: 1.6rem;
            }
            .stat-card__label {
                font-size: 0.8rem;
            }
        }

        /* ========== FEATURE BLOCK ========== */
        .feature-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .feature-block__img {
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            aspect-ratio: 4 / 3;
            object-fit: cover;
            width: 100%;
            background: #e8ecf4;
        }

        .feature-block__text h2 {
            font-size: 1.8rem;
            margin-bottom: 16px;
        }

        .feature-block__text p {
            color: var(--text-muted);
            line-height: 1.8;
            margin-bottom: 12px;
            font-size: 0.98rem;
        }

        .feature-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            margin-top: 18px;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: 0.95rem;
            color: var(--text-body);
            line-height: 1.6;
        }

        .feature-list li i {
            color: var(--primary);
            font-size: 1.05rem;
            margin-top: 2px;
            flex-shrink: 0;
        }

        @media (max-width: 768px) {
            .feature-block {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .feature-block__img {
                aspect-ratio: 16 / 10;
            }
            .feature-block__text h2 {
                font-size: 1.45rem;
            }
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
            max-width: 860px;
            margin: 0 auto;
        }

        .faq-item {
            background: #fff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-sm);
        }

        .faq-item:hover {
            border-color: rgba(91, 60, 201, 0.2);
        }

        .faq-item__q {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-dark);
            text-align: left;
            gap: 12px;
            transition: background var(--transition-fast);
            cursor: pointer;
            font-family: var(--font-heading);
            letter-spacing: 0.3px;
            line-height: 1.5;
        }

        .faq-item__q:hover {
            background: rgba(91, 60, 201, 0.03);
        }

        .faq-item__q i {
            flex-shrink: 0;
            transition: transform var(--transition-base);
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        .faq-item--open .faq-item__q i {
            transform: rotate(180deg);
            color: var(--primary);
        }

        .faq-item__a {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-slow), padding var(--transition-base);
            padding: 0 22px;
            color: var(--text-muted);
            font-size: 0.93rem;
            line-height: 1.75;
            background: rgba(248, 249, 252, 0.6);
        }

        .faq-item--open .faq-item__a {
            max-height: 500px;
            padding: 8px 22px 20px;
        }

        @media (max-width: 520px) {
            .faq-item__q {
                padding: 15px 16px;
                font-size: 0.9rem;
            }
            .faq-item__a {
                padding: 0 16px;
                font-size: 0.85rem;
            }
            .faq-item--open .faq-item__a {
                padding: 6px 16px 16px;
            }
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: var(--bg-dark-2);
            text-align: center;
            padding: 70px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -80px;
            width: 280px;
            height: 280px;
            background: radial-gradient(circle, rgba(91, 60, 201, 0.3) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -60px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(240, 160, 48, 0.25) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section .container {
            position: relative;
            z-index: 1;
        }

        .cta-section h2 {
            color: #fff;
            font-size: 2rem;
            margin-bottom: 14px;
            letter-spacing: 0.5px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1.05rem;
            margin-bottom: 28px;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.7;
        }

        .cta-section .btn {
            margin: 0 6px;
        }

        @media (max-width: 520px) {
            .cta-section {
                padding: 48px 0;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .cta-section p {
                font-size: 0.9rem;
            }
            .cta-section .btn {
                display: block;
                width: 100%;
                margin: 6px 0;
            }
        }

        /* ========== FOOTER ========== */
        .footer {
            background: var(--bg-dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 52px 0 28px;
            font-size: 0.9rem;
            line-height: 1.8;
        }

        .footer__grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer__brand {
            font-family: var(--font-heading);
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: 0.5px;
        }

        .footer__desc {
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.88rem;
            line-height: 1.7;
        }

        .footer h4 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.4px;
        }

        .footer ul {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .footer ul li a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.88rem;
            transition: color var(--transition-fast);
        }

        .footer ul li a:hover {
            color: var(--accent-light);
        }

        .footer__bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.4);
            letter-spacing: 0.3px;
        }

        @media (max-width: 768px) {
            .footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px 20px;
            }
        }

        @media (max-width: 480px) {
            .footer__grid {
                grid-template-columns: 1fr;
                gap: 22px;
            }
            .footer {
                padding: 36px 0 20px;
            }
        }

        /* ========== UTILITY ========== */
        .text-center {
            text-align: center;
        }
        .mt-sm {
            margin-top: 14px;
        }
        .mt-md {
            margin-top: 24px;
        }
        .mt-lg {
            margin-top: 36px;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

/* roulang page: category4 */
:root {
            --color-primary: #0f1923;
            --color-primary-light: #1a2533;
            --color-accent: #00d4ff;
            --color-accent-dark: #009fc4;
            --color-highlight: #ff4655;
            --color-highlight-hover: #e03a47;
            --color-bg: #f0f3f7;
            --color-surface: #ffffff;
            --color-surface-alt: #f7f9fb;
            --color-text: #1a1d23;
            --color-text-secondary: #5a6070;
            --color-text-muted: #8b919e;
            --color-border: #e2e6ed;
            --color-border-light: #eef1f5;
            --color-tag-bg: #e8f4fd;
            --color-tag-text: #0077aa;
            --color-success: #10b981;
            --color-warning: #f59e0b;
            --radius-sm: 6px;
            --radius-md: 10px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 1px 3px rgba(15, 25, 35, 0.06);
            --shadow-md: 0 4px 14px rgba(15, 25, 35, 0.08);
            --shadow-lg: 0 8px 30px rgba(15, 25, 35, 0.10);
            --shadow-xl: 0 16px 48px rgba(15, 25, 35, 0.12);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.18s ease;
            --transition-base: 0.25s ease;
            --transition-slow: 0.35s ease;
            --header-height: 68px;
            --container-max: 1200px;
            --container-narrow: 960px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            background: none;
        }

        input {
            font-family: inherit;
            font-size: inherit;
        }

        ul {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .container--narrow {
            max-width: var(--container-narrow);
        }

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

        /* Header */
        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: var(--color-primary);
            height: var(--header-height);
            box-shadow: 0 2px 20px rgba(15, 25, 35, 0.18);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .header__inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
        }

        .header__logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.02em;
            white-space: nowrap;
            flex-shrink: 0;
            transition: opacity var(--transition-fast);
        }
        .header__logo:hover {
            opacity: 0.88;
        }
        .header__logo i {
            color: var(--color-accent);
            font-size: 1.3rem;
        }

        .header__nav {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
        }
        .header__nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 15px;
            border-radius: var(--radius-sm);
            font-size: 0.925rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.78);
            white-space: nowrap;
            transition: all var(--transition-fast);
            letter-spacing: 0.01em;
        }
        .header__nav a:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.07);
        }
        .header__nav a.active {
            color: #ffffff;
            background: rgba(0, 212, 255, 0.14);
            font-weight: 600;
            box-shadow: inset 0 -2px 0 0 var(--color-accent);
        }

        .header__cta {
            flex-shrink: 0;
        }

        .header__burger {
            display: none;
            flex-shrink: 0;
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            align-items: center;
            justify-content: center;
            color: #ffffff;
            font-size: 1.3rem;
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: all var(--transition-fast);
            background: transparent;
        }
        .header__burger:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(255, 255, 255, 0.35);
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 7px;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
            letter-spacing: 0.015em;
            cursor: pointer;
            text-align: center;
            white-space: nowrap;
            user-select: none;
        }
        .btn--primary {
            background: var(--color-highlight);
            color: #ffffff;
            border: 2px solid var(--color-highlight);
            box-shadow: 0 2px 8px rgba(255, 70, 85, 0.25);
        }
        .btn--primary:hover {
            background: var(--color-highlight-hover);
            border-color: var(--color-highlight-hover);
            box-shadow: 0 6px 20px rgba(255, 70, 85, 0.35);
            transform: translateY(-1px);
        }
        .btn--primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(255, 70, 85, 0.3);
        }
        .btn--sm {
            padding: 9px 18px;
            font-size: 0.875rem;
        }
        .btn--md {
            padding: 12px 26px;
            font-size: 1rem;
        }
        .btn--lg {
            padding: 15px 34px;
            font-size: 1.1rem;
            border-radius: var(--radius-lg);
        }
        .btn--outline {
            background: transparent;
            color: var(--color-accent);
            border: 2px solid var(--color-accent);
        }
        .btn--outline:hover {
            background: var(--color-accent);
            color: #ffffff;
            box-shadow: 0 4px 16px rgba(0, 212, 255, 0.3);
            transform: translateY(-1px);
        }
        .btn--ghost {
            background: transparent;
            color: var(--color-text);
            border: 2px solid transparent;
        }
        .btn--ghost:hover {
            background: var(--color-surface-alt);
            border-color: var(--color-border);
        }

        /* Page Banner */
        .page-banner {
            position: relative;
            background: var(--color-primary-light);
            background-image: url('assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center 30%;
            background-repeat: no-repeat;
            padding: 70px 0;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 25, 35, 0.88) 0%, rgba(15, 25, 35, 0.72) 40%, rgba(15, 25, 35, 0.55) 100%);
            z-index: 1;
        }
        .page-banner__content {
            position: relative;
            z-index: 2;
            max-width: 700px;
        }
        .page-banner__label {
            display: inline-block;
            background: var(--color-accent);
            color: var(--color-primary);
            font-weight: 700;
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 16px;
        }
        .page-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #ffffff;
            line-height: 1.25;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }
        .page-banner__desc {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, 0.82);
            line-height: 1.65;
            max-width: 560px;
        }

        /* Sections */
        .section {
            padding: 60px 0;
        }
        .section--alt {
            background: var(--color-surface-alt);
        }
        .section--tight {
            padding: 40px 0;
        }
        .section__header {
            margin-bottom: 36px;
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 16px;
            flex-wrap: wrap;
        }
        .section__title {
            font-size: 1.55rem;
            font-weight: 700;
            color: var(--color-text);
            letter-spacing: -0.005em;
            position: relative;
            padding-left: 16px;
        }
        .section__title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 4px;
            bottom: 4px;
            width: 4px;
            background: var(--color-highlight);
            border-radius: 2px;
        }
        .section__link {
            font-size: 0.9rem;
            color: var(--color-accent-dark);
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: color var(--transition-fast);
        }
        .section__link:hover {
            color: var(--color-highlight);
        }
        .section__link i {
            font-size: 0.75rem;
            transition: transform var(--transition-fast);
        }
        .section__link:hover i {
            transform: translateX(3px);
        }

        /* Tags */
        .tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag {
            display: inline-flex;
            align-items: center;
            padding: 7px 15px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            background: var(--color-tag-bg);
            color: var(--color-tag-text);
            cursor: pointer;
            transition: all var(--transition-fast);
            border: 1px solid transparent;
            white-space: nowrap;
        }
        .tag:hover {
            background: #d0eaf8;
            border-color: var(--color-accent);
            color: #005f80;
        }
        .tag--active {
            background: var(--color-accent);
            color: #ffffff;
            border-color: var(--color-accent);
            font-weight: 600;
        }
        .tag--active:hover {
            background: var(--color-accent-dark);
            color: #ffffff;
            border-color: var(--color-accent-dark);
        }

        /* Featured Article */
        .featured-article {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            background: var(--color-surface);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            transition: box-shadow var(--transition-base), transform var(--transition-base);
        }
        .featured-article:hover {
            box-shadow: var(--shadow-xl);
            transform: translateY(-2px);
        }
        .featured-article__image {
            position: relative;
            min-height: 340px;
            overflow: hidden;
        }
        .featured-article__image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .featured-article:hover .featured-article__image img {
            transform: scale(1.04);
        }
        .featured-article__badge {
            position: absolute;
            top: 16px;
            left: 16px;
            background: var(--color-highlight);
            color: #ffffff;
            font-weight: 700;
            font-size: 0.78rem;
            padding: 5px 12px;
            border-radius: 20px;
            letter-spacing: 0.04em;
            z-index: 3;
        }
        .featured-article__body {
            padding: 32px 36px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 12px;
        }
        .featured-article__meta {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
            align-items: center;
        }
        .featured-article__meta i {
            color: var(--color-accent-dark);
            font-size: 0.75rem;
        }
        .featured-article h2 {
            font-size: 1.5rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--color-text);
            letter-spacing: -0.005em;
        }
        .featured-article__excerpt {
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* Article Grid */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .article-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition-base);
            display: flex;
            flex-direction: column;
            border: 1px solid var(--color-border-light);
        }
        .article-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-3px);
            border-color: var(--color-border);
        }
        .article-card__image {
            position: relative;
            aspect-ratio: 16 / 10;
            overflow: hidden;
            background: var(--color-surface-alt);
        }
        .article-card__image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }
        .article-card:hover .article-card__image img {
            transform: scale(1.05);
        }
        .article-card__category {
            position: absolute;
            top: 12px;
            left: 12px;
            font-size: 0.72rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 14px;
            background: rgba(15, 25, 35, 0.78);
            color: #ffffff;
            letter-spacing: 0.04em;
            z-index: 2;
            backdrop-filter: blur(4px);
        }
        .article-card__body {
            padding: 18px 20px 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .article-card__date {
            font-size: 0.8rem;
            color: var(--color-text-muted);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-card__date i {
            font-size: 0.7rem;
            color: var(--color-accent-dark);
        }
        .article-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.4;
            color: var(--color-text);
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card__excerpt {
            font-size: 0.85rem;
            color: var(--color-text-secondary);
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card__link {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--color-accent-dark);
            display: inline-flex;
            align-items: center;
            gap: 5px;
            margin-top: auto;
            transition: color var(--transition-fast);
        }
        .article-card__link i {
            font-size: 0.7rem;
            transition: transform var(--transition-fast);
        }
        .article-card__link:hover {
            color: var(--color-highlight);
        }
        .article-card__link:hover i {
            transform: translateX(3px);
        }

        /* Ranking */
        .ranking-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .ranking-item {
            display: flex;
            align-items: center;
            gap: 14px;
            background: var(--color-surface);
            padding: 14px 18px;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        .ranking-item:hover {
            box-shadow: var(--shadow-md);
            border-color: var(--color-border);
            background: #fafcfd;
        }
        .ranking-item__num {
            flex-shrink: 0;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 0.95rem;
            color: #ffffff;
            background: var(--color-text-muted);
        }
        .ranking-item:nth-child(1) .ranking-item__num {
            background: var(--color-highlight);
            box-shadow: 0 3px 10px rgba(255, 70, 85, 0.3);
        }
        .ranking-item:nth-child(2) .ranking-item__num {
            background: #f59e0b;
            box-shadow: 0 3px 10px rgba(245, 158, 11, 0.3);
        }
        .ranking-item:nth-child(3) .ranking-item__num {
            background: #e8791d;
            box-shadow: 0 3px 10px rgba(232, 121, 29, 0.3);
        }
        .ranking-item__info {
            flex: 1;
            min-width: 0;
        }
        .ranking-item__title {
            font-weight: 600;
            font-size: 0.925rem;
            color: var(--color-text);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .ranking-item__views {
            font-size: 0.78rem;
            color: var(--color-text-muted);
            margin-top: 2px;
        }

        /* CTA */
        .cta-card {
            background: var(--color-primary);
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            text-align: center;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }
        .cta-card::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -15%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(0, 212, 255, 0.08);
            pointer-events: none;
        }
        .cta-card::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -10%;
            width: 240px;
            height: 240px;
            border-radius: 50%;
            background: rgba(255, 70, 85, 0.06);
            pointer-events: none;
        }
        .cta-card__inner {
            position: relative;
            z-index: 1;
        }
        .cta-card h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }
        .cta-card__desc {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1rem;
            margin-bottom: 24px;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-card__form {
            display: flex;
            gap: 10px;
            max-width: 460px;
            margin: 0 auto;
            flex-wrap: wrap;
            justify-content: center;
        }
        .cta-card__input {
            flex: 1;
            min-width: 220px;
            padding: 13px 18px;
            border-radius: var(--radius-md);
            border: 2px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.08);
            color: #ffffff;
            font-size: 0.95rem;
            outline: none;
            transition: all var(--transition-fast);
        }
        .cta-card__input::placeholder {
            color: rgba(255, 255, 255, 0.45);
        }
        .cta-card__input:focus {
            border-color: var(--color-accent);
            background: rgba(255, 255, 255, 0.14);
            box-shadow: 0 0 0 4px rgba(0, 212, 255, 0.1);
        }

        /* Stats row */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .stat-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 24px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
        }
        .stat-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }
        .stat-card__icon {
            font-size: 1.8rem;
            color: var(--color-accent-dark);
            margin-bottom: 10px;
        }
        .stat-card__value {
            font-size: 1.9rem;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: -0.02em;
        }
        .stat-card__label {
            font-size: 0.85rem;
            color: var(--color-text-muted);
            margin-top: 4px;
        }

        /* Footer */
        .footer {
            background: var(--color-primary);
            color: rgba(255, 255, 255, 0.8);
            padding: 48px 0 20px;
            margin-top: auto;
        }
        .footer__grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 32px;
        }
        .footer__brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 10px;
            letter-spacing: 0.02em;
        }
        .footer__desc {
            font-size: 0.9rem;
            line-height: 1.6;
            color: rgba(255, 255, 255, 0.6);
            max-width: 280px;
        }
        .footer h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }
        .footer ul {
            display: flex;
            flex-direction: column;
            gap: 7px;
        }
        .footer ul li a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition-fast);
        }
        .footer ul li a:hover {
            color: var(--color-accent);
        }
        .footer ul li span {
            font-size: 0.88rem;
        }
        .footer__bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 18px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.45);
            text-align: center;
        }

        /* Mobile nav overlay */
        .nav-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(15, 25, 35, 0.95);
            z-index: 999;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 18px;
            padding: 40px 24px;
        }
        .nav-overlay.is-open {
            display: flex;
        }
        .nav-overlay a {
            font-size: 1.2rem;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.8);
            padding: 10px 20px;
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
        }
        .nav-overlay a:hover,
        .nav-overlay a.active {
            color: #ffffff;
            background: rgba(0, 212, 255, 0.15);
        }
        .nav-overlay__close {
            position: absolute;
            top: 20px;
            right: 24px;
            font-size: 1.6rem;
            color: #ffffff;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.25);
            transition: all var(--transition-fast);
        }
        .nav-overlay__close:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }
            .featured-article {
                grid-template-columns: 1fr;
            }
            .featured-article__image {
                min-height: 240px;
                max-height: 300px;
            }
            .featured-article__body {
                padding: 24px 24px;
            }
            .featured-article h2 {
                font-size: 1.3rem;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer__grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .page-banner h1 {
                font-size: 2.1rem;
            }
        }

        @media (max-width: 768px) {
            .header__nav {
                display: none;
            }
            .header__cta {
                display: none;
            }
            .header__burger {
                display: flex;
            }
            .article-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .section {
                padding: 40px 0;
            }
            .page-banner {
                padding: 44px 0;
            }
            .page-banner h1 {
                font-size: 1.7rem;
            }
            .page-banner__desc {
                font-size: 0.95rem;
            }
            .section__header {
                flex-direction: column;
                align-items: flex-start;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .stat-card__value {
                font-size: 1.5rem;
            }
            .cta-card {
                padding: 32px 20px;
            }
            .cta-card h2 {
                font-size: 1.4rem;
            }
            .cta-card__form {
                flex-direction: column;
                align-items: center;
            }
            .cta-card__input {
                width: 100%;
                min-width: auto;
            }
            .footer__grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer__desc {
                max-width: 100%;
            }
            .tags {
                gap: 8px;
            }
            .tag {
                padding: 6px 12px;
                font-size: 0.8rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .header__inner {
                padding: 0 16px;
            }
            .header__logo {
                font-size: 1.15rem;
            }
            .page-banner {
                padding: 34px 0;
            }
            .page-banner h1 {
                font-size: 1.4rem;
            }
            .page-banner__desc {
                font-size: 0.85rem;
            }
            .featured-article__image {
                min-height: 180px;
                max-height: 220px;
            }
            .featured-article__body {
                padding: 18px 16px;
            }
            .featured-article h2 {
                font-size: 1.1rem;
            }
            .section__title {
                font-size: 1.25rem;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-card {
                padding: 16px 12px;
            }
            .stat-card__value {
                font-size: 1.3rem;
            }
            .ranking-item {
                padding: 10px 14px;
                gap: 10px;
            }
            .btn--md {
                padding: 10px 20px;
                font-size: 0.9rem;
            }
        }