/* roulang page: index */
/* ===== 设计变量 ===== */
    :root {
        --primary: #0b1a2e;
        --primary-light: #132a44;
        --secondary: #0d7a7a;
        --secondary-light: #12a0a0;
        --accent: #0d9488;
        --bg-light: #f4f7fc;
        --bg-card: #ffffff;
        --text-dark: #1a2332;
        --text-body: #2d3a4f;
        --text-weak: #6b7a8f;
        --border-color: #e2e8f0;
        --shadow-sm: 0 2px 8px rgba(11, 26, 46, 0.06);
        --shadow-md: 0 6px 24px rgba(11, 26, 46, 0.08);
        --shadow-lg: 0 16px 48px rgba(11, 26, 46, 0.12);
        --radius-sm: 8px;
        --radius-md: 16px;
        --radius-lg: 24px;
        --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    }

    /* ===== Reset / Base ===== */
    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }
    html {
        scroll-behavior: smooth;
    }
    body {
        font-family: var(--font-sans);
        color: var(--text-body);
        background: var(--bg-light);
        line-height: 1.7;
        -webkit-font-smoothing: antialiased;
    }
    a {
        color: var(--secondary);
        text-decoration: none;
        transition: var(--transition);
    }
    a:hover {
        color: var(--secondary-light);
    }
    img {
        max-width: 100%;
        height: auto;
        display: block;
    }
    button,
    input,
    textarea {
        font-family: inherit;
    }
    ul {
        list-style: none;
        padding: 0;
    }

    /* ===== Container ===== */
    .container {
        max-width: 1200px;
        padding: 0 24px;
        margin: 0 auto;
    }
    @media (max-width: 768px) {
        .container {
            padding: 0 16px;
        }
    }

    /* ===== Typography ===== */
    .section-title {
        font-size: 2.2rem;
        font-weight: 700;
        color: var(--primary);
        letter-spacing: -0.02em;
        margin-bottom: 0.5rem;
    }
    .section-subtitle {
        font-size: 1.1rem;
        color: var(--text-weak);
        max-width: 640px;
        margin: 0 auto 2.5rem;
        text-align: center;
    }
    @media (max-width: 768px) {
        .section-title {
            font-size: 1.6rem;
        }
        .section-subtitle {
            font-size: 1rem;
        }
    }

    /* ===== Header / Nav ===== */
    .site-header {
        background: var(--primary);
        position: sticky;
        top: 0;
        z-index: 1040;
        box-shadow: 0 2px 20px rgba(11, 26, 46, 0.3);
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .site-header .navbar {
        padding: 0;
        min-height: 68px;
    }
    .site-header .navbar-brand {
        font-size: 1.4rem;
        font-weight: 700;
        color: #fff;
        letter-spacing: -0.01em;
        padding: 0.4rem 0;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .site-header .navbar-brand i {
        color: var(--secondary-light);
        font-size: 1.6rem;
    }
    .site-header .navbar-brand:hover {
        color: #fff;
        opacity: 0.92;
    }
    .site-header .nav-link {
        color: rgba(255, 255, 255, 0.75) !important;
        font-weight: 500;
        padding: 0.6rem 1.2rem !important;
        border-radius: var(--radius-sm);
        transition: var(--transition);
        position: relative;
        font-size: 0.95rem;
    }
    .site-header .nav-link:hover {
        color: #fff !important;
        background: rgba(255, 255, 255, 0.07);
    }
    .site-header .nav-link.active {
        color: #fff !important;
        background: rgba(13, 122, 122, 0.25);
    }
    .site-header .nav-link.active::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 50%;
        transform: translateX(-50%);
        width: 20px;
        height: 3px;
        background: var(--secondary-light);
        border-radius: 2px;
    }
    .nav-cta-btn {
        background: var(--secondary) !important;
        color: #fff !important;
        padding: 0.5rem 1.6rem !important;
        border-radius: 50px !important;
        font-weight: 600 !important;
        border: none;
        transition: var(--transition) !important;
        margin-left: 0.5rem;
        font-size: 0.9rem;
    }
    .nav-cta-btn:hover {
        background: var(--secondary-light) !important;
        transform: translateY(-1px);
        box-shadow: 0 4px 16px rgba(13, 122, 122, 0.35);
    }
    .navbar-toggler {
        border: none;
        color: #fff;
        font-size: 1.4rem;
        padding: 0.25rem 0.5rem;
    }
    .navbar-toggler:focus {
        box-shadow: none;
    }
    .navbar-toggler-icon {
        filter: brightness(0) invert(1);
    }
    @media (max-width: 991px) {
        .site-header .navbar-collapse {
            background: var(--primary-light);
            padding: 1rem 0.5rem;
            border-radius: 0 0 var(--radius-md) var(--radius-md);
            margin-top: 0.5rem;
        }
        .site-header .nav-link {
            padding: 0.7rem 1rem !important;
        }
        .nav-cta-btn {
            margin-left: 0;
            margin-top: 0.5rem;
            display: inline-block;
            text-align: center;
        }
    }

    /* ===== Hero ===== */
    .hero {
        background: linear-gradient(135deg, rgba(11, 26, 46, 0.88) 0%, rgba(11, 26, 46, 0.72) 100%), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        min-height: 92vh;
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        padding: 80px 24px;
        position: relative;
        overflow: hidden;
    }
    .hero::before {
        content: '';
        position: absolute;
        top: -30%;
        right: -10%;
        width: 500px;
        height: 500px;
        background: radial-gradient(circle, rgba(13, 122, 122, 0.15), transparent 70%);
        pointer-events: none;
    }
    .hero::after {
        content: '';
        position: absolute;
        bottom: -20%;
        left: -10%;
        width: 400px;
        height: 400px;
        background: radial-gradient(circle, rgba(13, 148, 136, 0.1), transparent 70%);
        pointer-events: none;
    }
    .hero-content {
        position: relative;
        z-index: 2;
        max-width: 860px;
    }
    .hero-badge {
        display: inline-block;
        background: rgba(13, 122, 122, 0.2);
        color: var(--secondary-light);
        padding: 0.35rem 1.4rem;
        border-radius: 50px;
        font-size: 0.85rem;
        font-weight: 600;
        letter-spacing: 0.3px;
        border: 1px solid rgba(13, 122, 122, 0.25);
        margin-bottom: 1.8rem;
        backdrop-filter: blur(4px);
    }
    .hero h1 {
        font-size: 3.6rem;
        font-weight: 800;
        color: #fff;
        line-height: 1.2;
        letter-spacing: -0.03em;
        margin-bottom: 1.2rem;
    }
    .hero h1 span {
        color: var(--secondary-light);
    }
    .hero p {
        font-size: 1.2rem;
        color: rgba(255, 255, 255, 0.8);
        max-width: 660px;
        margin: 0 auto 2.4rem;
        line-height: 1.8;
    }
    .hero-actions {
        display: flex;
        gap: 16px;
        justify-content: center;
        flex-wrap: wrap;
    }
    .hero-actions .btn {
        padding: 0.8rem 2.4rem;
        border-radius: 50px;
        font-weight: 600;
        font-size: 1rem;
        transition: var(--transition);
    }
    .hero-actions .btn-primary {
        background: var(--secondary);
        border: none;
        color: #fff;
    }
    .hero-actions .btn-primary:hover {
        background: var(--secondary-light);
        transform: translateY(-2px);
        box-shadow: 0 8px 28px rgba(13, 122, 122, 0.35);
    }
    .hero-actions .btn-outline {
        background: transparent;
        border: 2px solid rgba(255, 255, 255, 0.3);
        color: #fff;
    }
    .hero-actions .btn-outline:hover {
        border-color: var(--secondary-light);
        background: rgba(13, 122, 122, 0.15);
        transform: translateY(-2px);
    }
    .hero-stats {
        display: flex;
        gap: 40px;
        justify-content: center;
        margin-top: 3.5rem;
        flex-wrap: wrap;
    }
    .hero-stats .stat-item {
        text-align: center;
        color: #fff;
    }
    .hero-stats .stat-number {
        font-size: 2rem;
        font-weight: 700;
        color: var(--secondary-light);
    }
    .hero-stats .stat-label {
        font-size: 0.85rem;
        color: rgba(255, 255, 255, 0.6);
        margin-top: 0.2rem;
    }
    @media (max-width: 768px) {
        .hero {
            min-height: 70vh;
            padding: 60px 16px;
        }
        .hero h1 {
            font-size: 2.2rem;
        }
        .hero p {
            font-size: 1rem;
        }
        .hero-stats {
            gap: 24px;
        }
        .hero-stats .stat-number {
            font-size: 1.5rem;
        }
    }
    @media (max-width: 520px) {
        .hero h1 {
            font-size: 1.8rem;
        }
        .hero-actions .btn {
            width: 100%;
        }
    }

    /* ===== Section Spacing ===== */
    section {
        padding: 80px 0;
    }
    @media (max-width: 768px) {
        section {
            padding: 48px 0;
        }
    }

    /* ===== Stats / Data Cards ===== */
    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
    }
    .stat-card {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        padding: 2rem 1.5rem;
        text-align: center;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-color);
        transition: var(--transition);
    }
    .stat-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
    }
    .stat-card .icon {
        font-size: 2.2rem;
        color: var(--secondary);
        margin-bottom: 0.8rem;
    }
    .stat-card .number {
        font-size: 2.4rem;
        font-weight: 700;
        color: var(--primary);
        line-height: 1.2;
    }
    .stat-card .number span {
        font-size: 1.2rem;
        color: var(--text-weak);
        font-weight: 400;
    }
    .stat-card .label {
        font-size: 0.95rem;
        color: var(--text-weak);
        margin-top: 0.3rem;
    }
    @media (max-width: 991px) {
        .stats-grid {
            grid-template-columns: repeat(2, 1fr);
        }
    }
    @media (max-width: 520px) {
        .stats-grid {
            grid-template-columns: 1fr;
        }
    }

    /* ===== Games Grid (Cover Cards) ===== */
    .games-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .game-card {
        border-radius: var(--radius-md);
        overflow: hidden;
        background: var(--bg-card);
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-color);
        transition: var(--transition);
        position: relative;
    }
    .game-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--shadow-lg);
    }
    .game-card .card-img {
        width: 100%;
        height: 180px;
        object-fit: cover;
        display: block;
    }
    .game-card .card-body {
        padding: 1.2rem 1.4rem 1.4rem;
    }
    .game-card .card-body h3 {
        font-size: 1.15rem;
        font-weight: 600;
        color: var(--primary);
        margin-bottom: 0.3rem;
    }
    .game-card .card-body p {
        font-size: 0.9rem;
        color: var(--text-weak);
        margin-bottom: 0;
    }
    .game-card .tag {
        display: inline-block;
        background: rgba(13, 122, 122, 0.1);
        color: var(--secondary);
        font-size: 0.75rem;
        font-weight: 600;
        padding: 0.15rem 0.8rem;
        border-radius: 50px;
        margin-top: 0.5rem;
    }
    @media (max-width: 991px) {
        .games-grid {
            grid-template-columns: repeat(2, 1fr);
        }
    }
    @media (max-width: 520px) {
        .games-grid {
            grid-template-columns: 1fr;
        }
    }

    /* ===== Features ===== */
    .features-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }
    .feature-card {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        padding: 2.2rem 1.8rem;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-color);
        transition: var(--transition);
        text-align: center;
    }
    .feature-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
    }
    .feature-card .icon {
        width: 60px;
        height: 60px;
        border-radius: 50%;
        background: rgba(13, 122, 122, 0.08);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.6rem;
        color: var(--secondary);
        margin: 0 auto 1.2rem;
    }
    .feature-card h3 {
        font-size: 1.2rem;
        font-weight: 600;
        color: var(--primary);
        margin-bottom: 0.6rem;
    }
    .feature-card p {
        font-size: 0.95rem;
        color: var(--text-weak);
        margin-bottom: 0;
    }
    @media (max-width: 991px) {
        .features-grid {
            grid-template-columns: repeat(2, 1fr);
        }
    }
    @media (max-width: 520px) {
        .features-grid {
            grid-template-columns: 1fr;
        }
    }

    /* ===== Latest News (CMS) ===== */
    .news-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }
    .news-card {
        background: var(--bg-card);
        border-radius: var(--radius-md);
        overflow: hidden;
        box-shadow: var(--shadow-sm);
        border: 1px solid var(--border-color);
        transition: var(--transition);
    }
    .news-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-md);
    }
    .news-card .news-img {
        width: 100%;
        height: 170px;
        object-fit: cover;
        display: block;
    }
    .news-card .news-body {
        padding: 1.2rem 1.4rem 1.4rem;
    }
    .news-card .news-category {
        display: inline-block;
        font-size: 0.75rem;
        font-weight: 600;
        color: var(--secondary);
        background: rgba(13, 122, 122, 0.08);
        padding: 0.1rem 0.8rem;
        border-radius: 50px;
        margin-bottom: 0.5rem;
    }
    .news-card .news-title {
        font-size: 1.05rem;
        font-weight: 600;
        color: var(--primary);
        margin-bottom: 0.4rem;
        line-height: 1.4;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .news-card .news-title a {
        color: inherit;
    }
    .news-card .news-title a:hover {
        color: var(--secondary);
    }
    .news-card .news-meta {
        font-size: 0.8rem;
        color: var(--text-weak);
        display: flex;
        gap: 12px;
        align-items: center;
    }
    .news-card .news-excerpt {
        font-size: 0.9rem;
        color: var(--text-weak);
        margin-top: 0.5rem;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    .empty-news {
        grid-column: 1 / -1;
        text-align: center;
        padding: 3rem 1rem;
        color: var(--text-weak);
        background: var(--bg-card);
        border-radius: var(--radius-md);
        border: 1px dashed var(--border-color);
    }
    .empty-news i {
        font-size: 2.4rem;
        color: var(--border-color);
        margin-bottom: 0.8rem;
    }
    .empty-news p {
        font-size: 1rem;
        margin-bottom: 0;
    }
    @media (max-width: 991px) {
        .news-grid {
            grid-template-columns: repeat(2, 1fr);
        }
    }
    @media (max-width: 520px) {
        .news-grid {
            grid-template-columns: 1fr;
        }
    }

    /* ===== FAQ ===== */
    .faq-list {
        max-width: 800px;
        margin: 0 auto;
    }
    .faq-item {
        background: var(--bg-card);
        border-radius: var(--radius-sm);
        border: 1px solid var(--border-color);
        margin-bottom: 12px;
        overflow: hidden;
        transition: var(--transition);
    }
    .faq-item:hover {
        border-color: rgba(13, 122, 122, 0.2);
    }
    .faq-question {
        padding: 1.2rem 1.6rem;
        font-weight: 600;
        color: var(--primary);
        cursor: pointer;
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-size: 1rem;
        background: transparent;
        border: none;
        width: 100%;
        text-align: left;
        transition: var(--transition);
    }
    .faq-question i {
        color: var(--secondary);
        transition: var(--transition);
        font-size: 0.9rem;
    }
    .faq-question[aria-expanded="true"] i {
        transform: rotate(180deg);
    }
    .faq-answer {
        padding: 0 1.6rem 1.2rem;
        color: var(--text-weak);
        font-size: 0.95rem;
        line-height: 1.7;
    }
    .faq-answer p {
        margin-bottom: 0;
    }

    /* ===== CTA Section ===== */
    .cta-section {
        background: linear-gradient(135deg, rgba(11, 26, 46, 0.92) 0%, rgba(11, 26, 46, 0.82) 100%), url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
        padding: 100px 0;
        text-align: center;
        position: relative;
        overflow: hidden;
    }
    .cta-section::before {
        content: '';
        position: absolute;
        top: -50%;
        left: -20%;
        width: 600px;
        height: 600px;
        background: radial-gradient(circle, rgba(13, 122, 122, 0.12), transparent 70%);
        pointer-events: none;
    }
    .cta-section h2 {
        font-size: 2.4rem;
        font-weight: 700;
        color: #fff;
        margin-bottom: 1rem;
        position: relative;
        z-index: 2;
    }
    .cta-section p {
        font-size: 1.1rem;
        color: rgba(255, 255, 255, 0.75);
        max-width: 580px;
        margin: 0 auto 2rem;
        position: relative;
        z-index: 2;
    }
    .cta-section .btn {
        background: var(--secondary);
        color: #fff;
        padding: 0.9rem 2.8rem;
        border-radius: 50px;
        font-weight: 600;
        font-size: 1rem;
        border: none;
        transition: var(--transition);
        position: relative;
        z-index: 2;
    }
    .cta-section .btn:hover {
        background: var(--secondary-light);
        transform: translateY(-2px);
        box-shadow: 0 8px 32px rgba(13, 122, 122, 0.4);
    }
    @media (max-width: 768px) {
        .cta-section {
            padding: 60px 0;
        }
        .cta-section h2 {
            font-size: 1.6rem;
        }
        .cta-section p {
            font-size: 1rem;
        }
    }

    /* ===== Footer ===== */
    .site-footer {
        background: var(--primary);
        color: rgba(255, 255, 255, 0.7);
        padding: 48px 0 32px;
        border-top: 1px solid rgba(255, 255, 255, 0.05);
    }
    .site-footer .footer-brand {
        font-size: 1.2rem;
        font-weight: 700;
        color: #fff;
        display: flex;
        align-items: center;
        gap: 8px;
        margin-bottom: 0.6rem;
    }
    .site-footer .footer-brand i {
        color: var(--secondary-light);
    }
    .site-footer .footer-desc {
        font-size: 0.9rem;
        color: rgba(255, 255, 255, 0.5);
        max-width: 360px;
        line-height: 1.6;
    }
    .site-footer .footer-heading {
        font-size: 0.95rem;
        font-weight: 600;
        color: #fff;
        margin-bottom: 1rem;
    }
    .site-footer .footer-links li {
        margin-bottom: 0.5rem;
    }
    .site-footer .footer-links a {
        color: rgba(255, 255, 255, 0.6);
        font-size: 0.9rem;
        transition: var(--transition);
    }
    .site-footer .footer-links a:hover {
        color: var(--secondary-light);
    }
    .site-footer .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.06);
        padding-top: 1.5rem;
        margin-top: 2rem;
        display: flex;
        justify-content: space-between;
        align-items: center;
        flex-wrap: wrap;
        gap: 12px;
        font-size: 0.85rem;
        color: rgba(255, 255, 255, 0.4);
    }
    .site-footer .footer-bottom a {
        color: rgba(255, 255, 255, 0.4);
    }
    .site-footer .footer-bottom a:hover {
        color: var(--secondary-light);
    }
    @media (max-width: 768px) {
        .site-footer .footer-bottom {
            flex-direction: column;
            text-align: center;
        }
    }

    /* ===== Section Background Alt ===== */
    .section-bg-alt {
        background: #fff;
    }

    /* ===== Utility ===== */
    .text-center {
        text-align: center;
    }
    .mb-1 {
        margin-bottom: 0.5rem;
    }
    .mb-2 {
        margin-bottom: 1rem;
    }
    .mb-3 {
        margin-bottom: 1.5rem;
    }
    .mb-4 {
        margin-bottom: 2rem;
    }
    .mt-3 {
        margin-top: 1.5rem;
    }
    .mt-4 {
        margin-top: 2rem;
    }
    .gap-2 {
        gap: 0.75rem;
    }
    .gap-3 {
        gap: 1.5rem;
    }

/* roulang page: article */
:root {
            --primary: #0f1b2d;
            --primary-light: #1a2d4a;
            --accent: #00d4aa;
            --accent-hover: #00bf9a;
            --accent-glow: rgba(0, 212, 170, 0.15);
            --bg-dark: #0a111f;
            --bg-card: #132238;
            --bg-card-hover: #1a2d4a;
            --text-main: #e8edf5;
            --text-muted: #8899b4;
            --text-light: #b0c4de;
            --border-color: rgba(0, 212, 170, 0.12);
            --border-light: rgba(255, 255, 255, 0.06);
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-hover: 0 16px 48px rgba(0, 212, 170, 0.10);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-dark);
            color: var(--text-main);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
        }
        a { color: var(--accent); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--accent-hover); text-decoration: none; }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        .container { max-width: 1200px; padding: 0 20px; margin: 0 auto; }

        /* header & nav */
        .site-header {
            background: rgba(10, 17, 31, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1050;
            padding: 0;
            transition: var(--transition);
        }
        .site-header .navbar {
            padding: 12px 0;
        }
        .navbar-brand {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-main) !important;
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .navbar-brand i {
            color: var(--accent);
            font-size: 1.6rem;
            background: var(--accent-glow);
            padding: 6px;
            border-radius: 8px;
        }
        .navbar-brand:hover i {
            transform: scale(1.05);
        }
        .navbar .nav-link {
            color: var(--text-light) !important;
            font-weight: 500;
            padding: 8px 18px !important;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            font-size: 0.95rem;
            position: relative;
        }
        .navbar .nav-link:hover,
        .navbar .nav-link.active {
            color: var(--text-main) !important;
            background: rgba(0, 212, 170, 0.08);
        }
        .navbar .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 18px;
            right: 18px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .navbar .nav-cta-btn {
            background: linear-gradient(135deg, var(--accent), #00b894) !important;
            color: #0a111f !important;
            font-weight: 700 !important;
            padding: 10px 26px !important;
            border-radius: 50px !important;
            box-shadow: 0 4px 20px rgba(0, 212, 170, 0.25);
            transition: var(--transition);
            border: none;
        }
        .navbar .nav-cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(0, 212, 170, 0.35);
            color: #0a111f !important;
            background: linear-gradient(135deg, #00bf9a, #00a382) !important;
        }
        .navbar .nav-cta-btn i {
            color: #0a111f;
        }
        .navbar-toggler {
            border: 1px solid var(--border-color);
            color: var(--text-main);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            background: transparent;
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px var(--accent-glow);
        }
        .navbar-toggler i {
            font-size: 1.3rem;
        }

        /* article banner */
        .article-banner {
            position: relative;
            padding: 80px 0 60px;
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary) 100%);
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.10;
            pointer-events: none;
        }
        .article-banner .container {
            position: relative;
            z-index: 2;
        }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a {
            color: var(--text-muted);
            transition: var(--transition);
        }
        .article-breadcrumb a:hover {
            color: var(--accent);
        }
        .article-breadcrumb .sep {
            color: var(--text-muted);
            opacity: 0.4;
        }
        .article-banner .category-badge {
            display: inline-block;
            background: var(--accent-glow);
            color: var(--accent);
            padding: 4px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            border: 1px solid var(--border-color);
            margin-bottom: 16px;
        }
        .article-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.25;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            color: var(--text-muted);
            font-size: 0.9rem;
            flex-wrap: wrap;
        }
        .article-meta i {
            color: var(--accent);
            margin-right: 6px;
            width: 16px;
        }
        .article-meta span {
            display: flex;
            align-items: center;
        }

        /* main content */
        .article-main {
            padding: 60px 0 80px;
        }
        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 48px 52px;
            box-shadow: var(--shadow-card);
        }
        .article-content .content-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-light);
        }
        .article-content .content-body p {
            margin-bottom: 1.4rem;
        }
        .article-content .content-body h2,
        .article-content .content-body h3,
        .article-content .content-body h4 {
            color: var(--text-main);
            font-weight: 700;
            margin-top: 2rem;
            margin-bottom: 1rem;
        }
        .article-content .content-body h2 { font-size: 1.6rem; }
        .article-content .content-body h3 { font-size: 1.3rem; }
        .article-content .content-body h4 { font-size: 1.1rem; }
        .article-content .content-body ul,
        .article-content .content-body ol {
            margin-bottom: 1.4rem;
            padding-left: 1.5rem;
        }
        .article-content .content-body li {
            margin-bottom: 0.4rem;
        }
        .article-content .content-body img {
            border-radius: var(--radius);
            margin: 1.8rem auto;
            box-shadow: var(--shadow-card);
        }
        .article-content .content-body blockquote {
            border-left: 4px solid var(--accent);
            background: var(--accent-glow);
            padding: 16px 24px;
            margin: 1.8rem 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-light);
            font-style: italic;
        }
        .article-content .content-body a {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content .content-body a:hover {
            color: var(--accent-hover);
        }
        .article-content .content-body .table-wrap {
            overflow-x: auto;
            margin: 1.8rem 0;
        }
        .article-content .content-body table {
            width: 100%;
            border-collapse: collapse;
            background: rgba(0,0,0,0.2);
            border-radius: var(--radius-sm);
            overflow: hidden;
        }
        .article-content .content-body table th,
        .article-content .content-body table td {
            padding: 12px 18px;
            border: 1px solid var(--border-color);
            text-align: left;
        }
        .article-content .content-body table th {
            background: var(--primary-light);
            color: var(--text-main);
            font-weight: 600;
        }
        .article-content .content-body table td {
            color: var(--text-light);
        }

        .article-footer-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-top: 40px;
            padding-top: 32px;
            border-top: 1px solid var(--border-color);
            flex-wrap: wrap;
            gap: 16px;
        }
        .article-footer-nav .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            background: var(--primary-light);
            color: var(--text-main);
            border-radius: 50px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            font-weight: 500;
        }
        .article-footer-nav .btn-back:hover {
            background: var(--accent);
            color: #0a111f;
            border-color: var(--accent);
            transform: translateX(-4px);
        }
        .article-footer-nav .btn-share {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .article-footer-nav .btn-share a {
            color: var(--text-muted);
            font-size: 1.2rem;
            transition: var(--transition);
        }
        .article-footer-nav .btn-share a:hover {
            color: var(--accent);
            transform: translateY(-2px);
        }

        /* not found */
        .article-not-found {
            text-align: center;
            padding: 100px 20px;
        }
        .article-not-found .nf-icon {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 24px;
            opacity: 0.4;
        }
        .article-not-found h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 28px;
        }
        .article-not-found .btn-home {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--accent);
            color: #0a111f;
            font-weight: 700;
            border-radius: 50px;
            transition: var(--transition);
        }
        .article-not-found .btn-home:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 212, 170, 0.25);
        }

        /* footer */
        .site-footer {
            background: var(--primary);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .site-footer .footer-brand {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }
        .site-footer .footer-brand i {
            color: var(--accent);
            font-size: 1.5rem;
        }
        .site-footer .footer-desc {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
            max-width: 360px;
        }
        .site-footer .footer-heading {
            color: var(--text-main);
            font-size: 1rem;
            font-weight: 600;
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }
        .site-footer .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer .footer-links li {
            margin-bottom: 10px;
        }
        .site-footer .footer-links a {
            color: var(--text-muted);
            font-size: 0.92rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
        }
        .site-footer .footer-links a:hover {
            color: var(--accent);
            transform: translateX(4px);
        }
        .site-footer .footer-links .text-muted {
            color: var(--text-muted);
            font-size: 0.92rem;
        }
        .site-footer .footer-bottom {
            margin-top: 40px;
            padding-top: 24px;
            border-top: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .site-footer .footer-bottom a {
            color: var(--text-muted);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--accent);
        }

        /* responsive */
        @media (max-width: 1024px) {
            .article-banner h1 { font-size: 2.2rem; }
            .article-content { padding: 36px 32px; }
        }
        @media (max-width: 768px) {
            .site-header .navbar { padding: 10px 0; }
            .navbar-brand { font-size: 1.2rem; }
            .navbar .nav-link { padding: 10px 16px !important; }
            .navbar .nav-cta-btn { margin-top: 8px; text-align: center; }
            .navbar-collapse { background: var(--bg-dark); padding: 16px 0; border-radius: var(--radius); margin-top: 8px; border: 1px solid var(--border-color); }
            .article-banner { padding: 60px 0 40px; }
            .article-banner h1 { font-size: 1.7rem; }
            .article-meta { gap: 12px; font-size: 0.82rem; }
            .article-main { padding: 40px 0 60px; }
            .article-content { padding: 24px 20px; border-radius: var(--radius); }
            .article-content .content-body { font-size: 0.98rem; }
            .article-footer-nav { flex-direction: column; align-items: flex-start; }
            .site-footer { padding: 40px 0 24px; }
            .site-footer .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .navbar-brand { font-size: 1.05rem; gap: 6px; }
            .navbar-brand i { font-size: 1.2rem; padding: 4px; }
            .article-banner h1 { font-size: 1.4rem; }
            .article-content { padding: 18px 14px; }
            .article-content .content-body { font-size: 0.93rem; }
            .article-breadcrumb { font-size: 0.78rem; }
            .article-meta { gap: 8px; font-size: 0.78rem; flex-direction: column; align-items: flex-start; }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f1923;
            --primary-light: #1a2c3e;
            --accent: #00e5a0;
            --accent-hover: #00c48a;
            --accent-soft: rgba(0, 229, 160, 0.12);
            --bg-dark: #0b1219;
            --bg-card: #141f2b;
            --bg-card-hover: #1a2c3e;
            --bg-section-alt: #0d1620;
            --text-white: #f0f4f8;
            --text-light: #c8d6e5;
            --text-muted: #7a8ea0;
            --border-color: rgba(0, 229, 160, 0.15);
            --border-light: rgba(255, 255, 255, 0.06);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.45);
            --shadow-hover: 0 16px 48px rgba(0, 229, 160, 0.12);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, 'Helvetica Neue', Arial, sans-serif;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-dark);
            color: var(--text-light);
            line-height: 1.7;
            margin: 0;
            padding: 0;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-hover);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        button,
        input,
        textarea {
            font-family: inherit;
        }
        ul {
            padding-left: 0;
            list-style: none;
            margin-bottom: 0;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-white);
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.01em;
        }
        ::selection {
            background: var(--accent);
            color: var(--bg-dark);
        }

        /* ===== Container ===== */
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Header / Nav ===== */
        .site-header {
            background: rgba(11, 18, 25, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-light);
            position: sticky;
            top: 0;
            z-index: 1050;
            padding: 0;
            transition: var(--transition);
        }
        .site-header .navbar {
            padding: 12px 0;
        }
        .site-header .navbar-brand {
            font-size: 1.45rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0;
        }
        .site-header .navbar-brand i {
            color: var(--accent);
            font-size: 1.8rem;
        }
        .site-header .navbar-brand:hover {
            color: var(--accent);
        }
        .site-header .nav-link {
            color: var(--text-light);
            font-weight: 500;
            padding: 8px 18px !important;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            font-size: 0.95rem;
            position: relative;
        }
        .site-header .nav-link:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.05);
        }
        .site-header .nav-link.active {
            color: var(--accent) !important;
            background: var(--accent-soft);
        }
        .site-header .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 18px;
            right: 18px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .site-header .nav-cta-btn {
            background: linear-gradient(135deg, var(--accent), #00b894) !important;
            color: var(--bg-dark) !important;
            font-weight: 700;
            padding: 10px 24px !important;
            border-radius: var(--radius-md);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            box-shadow: 0 4px 16px rgba(0, 229, 160, 0.3);
            transition: var(--transition);
        }
        .site-header .nav-cta-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 229, 160, 0.4);
            background: linear-gradient(135deg, var(--accent-hover), #00a87a) !important;
            color: var(--bg-dark) !important;
        }
        .navbar-toggler {
            border: none;
            background: transparent;
            color: var(--text-white);
            font-size: 1.5rem;
            padding: 4px 8px;
        }
        .navbar-toggler:focus {
            box-shadow: none;
        }
        .navbar-toggler i {
            color: var(--text-white);
        }

        /* ===== Hero / Banner ===== */
        .category-hero {
            position: relative;
            padding: 100px 0 90px;
            background: linear-gradient(135deg, #0b1219 0%, #141f2b 60%, #0d1620 100%);
            overflow: hidden;
            min-height: 420px;
            display: flex;
            align-items: center;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.25;
            mix-blend-mode: overlay;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(0, 229, 160, 0.08) 0%, transparent 70%);
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .category-hero .hero-badge {
            display: inline-block;
            background: var(--accent-soft);
            color: var(--accent);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.3px;
            margin-bottom: 16px;
            border: 1px solid rgba(0, 229, 160, 0.2);
        }
        .category-hero h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            max-width: 700px;
            letter-spacing: -0.03em;
        }
        .category-hero h1 span {
            color: var(--accent);
        }
        .category-hero .hero-desc {
            font-size: 1.15rem;
            color: var(--text-light);
            max-width: 600px;
            margin-bottom: 28px;
            line-height: 1.8;
        }
        .category-hero .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 32px 48px;
            margin-top: 12px;
        }
        .category-hero .hero-stats .stat-item {
            text-align: center;
        }
        .category-hero .hero-stats .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent);
            line-height: 1.2;
        }
        .category-hero .hero-stats .stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 400;
        }

        /* ===== Section General ===== */
        .section-block {
            padding: 80px 0;
        }
        .section-block-alt {
            background: var(--bg-section-alt);
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
            letter-spacing: -0.02em;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 640px;
            margin: 0 auto 48px;
            text-align: center;
        }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .section-title {
            margin-bottom: 8px;
        }
        .section-header .section-subtitle {
            margin-bottom: 0;
        }

        /* ===== Cards ===== */
        .card-guide {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 28px 24px 24px;
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
            box-shadow: var(--shadow-card);
        }
        .card-guide:hover {
            border-color: rgba(0, 229, 160, 0.25);
            box-shadow: var(--shadow-hover);
            transform: translateY(-6px);
            background: var(--bg-card-hover);
        }
        .card-guide .card-icon {
            font-size: 2.2rem;
            color: var(--accent);
            margin-bottom: 16px;
            display: inline-block;
            width: 56px;
            height: 56px;
            line-height: 56px;
            text-align: center;
            background: var(--accent-soft);
            border-radius: var(--radius-md);
        }
        .card-guide .card-img-top {
            border-radius: var(--radius-md);
            margin-bottom: 18px;
            width: 100%;
            height: 180px;
            object-fit: cover;
        }
        .card-guide h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 10px;
        }
        .card-guide p {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }
        .card-guide .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            margin-bottom: 16px;
        }
        .card-guide .card-tags .badge-tag {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-muted);
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 500;
            border: 1px solid var(--border-light);
        }
        .card-guide .card-tags .badge-tag.hot {
            background: rgba(0, 229, 160, 0.15);
            color: var(--accent);
            border-color: rgba(0, 229, 160, 0.25);
        }
        .card-guide .card-link {
            color: var(--accent);
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: var(--transition);
        }
        .card-guide .card-link:hover {
            gap: 12px;
            color: var(--accent-hover);
        }

        /* ===== Steps / Process ===== */
        .step-item {
            display: flex;
            gap: 20px;
            padding: 24px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border-light);
            transition: var(--transition);
            margin-bottom: 16px;
        }
        .step-item:hover {
            border-color: rgba(0, 229, 160, 0.2);
            background: var(--bg-card-hover);
        }
        .step-number {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 1.2rem;
            font-weight: 800;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(0, 229, 160, 0.2);
        }
        .step-content h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 6px;
        }
        .step-content p {
            color: var(--text-light);
            font-size: 0.92rem;
            margin-bottom: 0;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            margin-bottom: 12px;
            transition: var(--transition);
            cursor: pointer;
        }
        .faq-item:hover {
            border-color: rgba(0, 229, 160, 0.2);
        }
        .faq-item .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 600;
            color: var(--text-white);
            font-size: 1.05rem;
            gap: 12px;
        }
        .faq-item .faq-question i {
            color: var(--accent);
            transition: var(--transition);
            font-size: 1.1rem;
        }
        .faq-item .faq-answer {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
            padding-top: 14px;
            border-top: 1px solid var(--border-light);
            margin-top: 14px;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }

        /* ===== CTA ===== */
        .cta-block {
            background: linear-gradient(135deg, #0f1923 0%, #1a2c3e 100%);
            border: 1px solid rgba(0, 229, 160, 0.15);
            border-radius: var(--radius-xl);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }
        .cta-block .cta-content {
            position: relative;
            z-index: 2;
        }
        .cta-block h2 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 12px;
        }
        .cta-block p {
            color: var(--text-light);
            font-size: 1.05rem;
            max-width: 560px;
            margin: 0 auto 28px;
        }
        .cta-block .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--accent), #00b894);
            color: var(--bg-dark);
            font-weight: 700;
            padding: 14px 40px;
            border-radius: 50px;
            font-size: 1.05rem;
            border: none;
            box-shadow: 0 6px 24px rgba(0, 229, 160, 0.3);
            transition: var(--transition);
        }
        .cta-block .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(0, 229, 160, 0.4);
            color: var(--bg-dark);
            background: linear-gradient(135deg, var(--accent-hover), #00a87a);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #0a1017;
            border-top: 1px solid var(--border-light);
            padding: 60px 0 30px;
            margin-top: 20px;
        }
        .site-footer .footer-brand {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-white);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 12px;
        }
        .site-footer .footer-brand i {
            color: var(--accent);
            font-size: 1.7rem;
        }
        .site-footer .footer-desc {
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.7;
            max-width: 340px;
        }
        .site-footer .footer-heading {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .site-footer .footer-links li {
            margin-bottom: 10px;
        }
        .site-footer .footer-links a {
            color: var(--text-muted);
            font-size: 0.92rem;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .site-footer .footer-links a:hover {
            color: var(--accent);
            transform: translateX(4px);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding-top: 24px;
            margin-top: 40px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .site-footer .footer-bottom a {
            color: var(--text-muted);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--accent);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .category-hero h1 {
                font-size: 2.6rem;
            }
            .section-title {
                font-size: 1.9rem;
            }
            .cta-block {
                padding: 40px 28px;
            }
        }
        @media (max-width: 768px) {
            .category-hero {
                padding: 60px 0 50px;
                min-height: auto;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .category-hero .hero-desc {
                font-size: 1rem;
            }
            .category-hero .hero-stats {
                gap: 20px 28px;
            }
            .category-hero .hero-stats .stat-number {
                font-size: 1.6rem;
            }
            .section-block {
                padding: 50px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }
            .card-guide {
                padding: 20px 18px;
            }
            .card-guide .card-img-top {
                height: 140px;
            }
            .step-item {
                flex-direction: column;
                gap: 12px;
                padding: 18px 16px;
            }
            .step-number {
                width: 36px;
                height: 36px;
                font-size: 1rem;
            }
            .faq-item {
                padding: 16px 18px;
            }
            .faq-item .faq-question {
                font-size: 0.95rem;
            }
            .cta-block {
                padding: 32px 20px;
            }
            .cta-block h2 {
                font-size: 1.5rem;
            }
            .cta-block .btn-cta {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
            .site-footer {
                padding: 40px 0 20px;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-header .navbar-brand {
                font-size: 1.2rem;
            }
            .site-header .navbar-brand i {
                font-size: 1.4rem;
            }
            .site-header .nav-link.active::after {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .category-hero h1 {
                font-size: 1.6rem;
            }
            .category-hero .hero-stats {
                gap: 12px 20px;
            }
            .category-hero .hero-stats .stat-number {
                font-size: 1.3rem;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .card-guide .card-img-top {
                height: 120px;
            }
            .cta-block h2 {
                font-size: 1.25rem;
            }
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* ===== Utility ===== */
        .text-accent {
            color: var(--accent) !important;
        }
        .bg-accent-soft {
            background: var(--accent-soft);
        }
        .mb-0 {
            margin-bottom: 0 !important;
        }
        .gap-2 {
            gap: 8px;
        }
        .gap-3 {
            gap: 16px;
        }
        .gap-4 {
            gap: 24px;
        }
        .mt-2 {
            margin-top: 8px;
        }
        .mt-3 {
            margin-top: 16px;
        }
        .mt-4 {
            margin-top: 24px;
        }