/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --clr-primary: #0d0d1a;
            --clr-primary-light: #1a1a2e;
            --clr-primary-mid: #16213e;
            --clr-accent: #d4a853;
            --clr-accent-light: #f0d080;
            --clr-accent-dark: #b8923e;
            --clr-bg: #0a0a14;
            --clr-bg-card: #12122a;
            --clr-bg-card-hover: #1a1a3a;
            --clr-text: #f0ece4;
            --clr-text-muted: #9a95a8;
            --clr-text-light: #c8c4d0;
            --clr-border: rgba(212, 168, 83, 0.18);
            --clr-border-hover: rgba(212, 168, 83, 0.40);
            --clr-overlay: rgba(0,0,0,0.55);
            --clr-overlay-light: rgba(0,0,0,0.30);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.30);
            --shadow-md: 0 8px 28px rgba(0,0,0,0.40);
            --shadow-lg: 0 20px 60px rgba(0,0,0,0.50);
            --shadow-glow: 0 0 30px rgba(212,168,83,0.15);
            --transition: 0.30s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Segoe UI', 'PingFang SC', Roboto, 'Helvetica Neue', sans-serif;
            --container-max: 1200px;
            --nav-height: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::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(--clr-bg);
            color: var(--clr-text);
            line-height: 1.7;
            font-size: 16px;
        }
        a { color: var(--clr-accent); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--clr-accent-light); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--clr-text); }
        h1 { font-size: clamp(2.2rem, 6vw, 3.8rem); }
        h2 { font-size: clamp(1.6rem, 4vw, 2.6rem); }
        h3 { font-size: clamp(1.15rem, 2.5vw, 1.55rem); }
        h4 { font-size: 1.15rem; }
        p { margin-bottom: 1rem; color: var(--clr-text-light); }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section { padding: 80px 0; }
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-title h2 {
            position: relative;
            display: inline-block;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: var(--clr-accent);
            border-radius: 4px;
            margin: 14px auto 0;
        }
        .section-title p {
            max-width: 660px;
            margin: 16px auto 0;
            color: var(--clr-text-muted);
            font-size: 1.05rem;
        }

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(13, 13, 26, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--clr-border);
            height: var(--nav-height);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(10, 10, 20, 0.97);
            box-shadow: var(--shadow-sm);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: center;
            height: var(--nav-height);
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
        }
        .nav-left, .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
        }
        .nav-left { justify-content: flex-start; }
        .nav-right { justify-content: flex-end; }
        .nav-logo {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: 1px;
            color: var(--clr-text);
            background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
            padding: 0 20px;
        }
        .nav-logo:hover { opacity: 0.85; }
        .nav-link {
            display: inline-block;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.94rem;
            font-weight: 500;
            color: var(--clr-text-light);
            transition: var(--transition);
            position: relative;
        }
        .nav-link:hover { color: var(--clr-accent); background: rgba(212,168,83,0.10); }
        .nav-link.active {
            color: var(--clr-accent);
            background: rgba(212,168,83,0.12);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--clr-accent);
            border-radius: 3px;
        }
        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--clr-text);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
            background: transparent;
        }
        .nav-toggle:hover { background: rgba(212,168,83,0.10); color: var(--clr-accent); }
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            width: 100%;
            background: rgba(13, 13, 26, 0.98);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--clr-border);
            padding: 16px 24px;
            flex-direction: column;
            gap: 4px;
            z-index: 999;
            transform: translateY(-10px);
            opacity: 0;
            transition: var(--transition);
            pointer-events: none;
        }
        .mobile-menu.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: all;
        }
        .mobile-menu .nav-link {
            padding: 12px 16px;
            font-size: 1.05rem;
            border-radius: var(--radius-sm);
        }
        .mobile-menu .nav-link.active { background: rgba(212,168,83,0.15); }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 24px 80px;
            background: linear-gradient(135deg, var(--clr-primary) 0%, #0f0f2a 50%, var(--clr-primary-light) 100%);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.30;
            z-index: 0;
            pointer-events: none;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, rgba(13,13,26,0.60) 0%, rgba(13,13,26,0.90) 100%);
            z-index: 1;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 900px;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 20px;
            border-radius: 50px;
            background: rgba(212,168,83,0.15);
            border: 1px solid rgba(212,168,83,0.25);
            color: var(--clr-accent);
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
        }
        .hero h1 {
            font-weight: 900;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #f0ece4 0%, var(--clr-accent) 50%, var(--clr-accent-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.15rem;
            max-width: 680px;
            margin: 0 auto 36px;
            color: var(--clr-text-muted);
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 34px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: var(--transition);
            border: 2px solid transparent;
            text-decoration: none;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--clr-accent-dark), var(--clr-accent));
            color: #0d0d1a;
            border-color: var(--clr-accent);
            box-shadow: var(--shadow-glow);
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent-light));
            color: #0d0d1a;
            transform: translateY(-3px);
            box-shadow: 0 12px 40px rgba(212,168,83,0.30);
        }
        .btn-primary:active { transform: translateY(0); }
        .btn-primary:focus-visible { outline: 3px solid var(--clr-accent); outline-offset: 3px; }
        .btn-outline {
            background: transparent;
            color: var(--clr-accent);
            border-color: var(--clr-accent);
        }
        .btn-outline:hover {
            background: rgba(212,168,83,0.12);
            color: var(--clr-accent-light);
            border-color: var(--clr-accent-light);
            transform: translateY(-3px);
        }
        .btn-outline:active { transform: translateY(0); }
        .btn-outline:focus-visible { outline: 3px solid var(--clr-accent); outline-offset: 3px; }
        .btn-sm {
            padding: 10px 22px;
            font-size: 0.88rem;
        }

        /* ===== Features / Core Advantages ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .feature-card {
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            padding: 36px 28px;
            transition: var(--transition);
            text-align: center;
        }
        .feature-card:hover {
            background: var(--clr-bg-card-hover);
            border-color: var(--clr-border-hover);
            transform: translateY(-6px);
            box-shadow: var(--shadow-md), var(--shadow-glow);
        }
        .feature-icon {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: rgba(212,168,83,0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.6rem;
            color: var(--clr-accent);
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: rgba(212,168,83,0.22);
            transform: scale(1.05);
        }
        .feature-card h3 { margin-bottom: 12px; }
        .feature-card p { font-size: 0.94rem; color: var(--clr-text-muted); margin-bottom: 0; }

        /* ===== Category / Platform Guide ===== */
        .category-section {
            background: var(--clr-primary-light);
        }
        .category-card {
            display: flex;
            align-items: center;
            gap: 40px;
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-lg);
            padding: 40px;
            transition: var(--transition);
        }
        .category-card:hover {
            border-color: var(--clr-border-hover);
            box-shadow: var(--shadow-md), var(--shadow-glow);
            transform: translateY(-4px);
        }
        .category-img {
            flex: 0 0 300px;
            border-radius: var(--radius-md);
            overflow: hidden;
        }
        .category-img img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            transition: var(--transition);
        }
        .category-card:hover .category-img img {
            transform: scale(1.04);
        }
        .category-info { flex: 1; }
        .category-info h3 { font-size: 1.6rem; margin-bottom: 12px; }
        .category-info p { color: var(--clr-text-muted); margin-bottom: 20px; }
        .category-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 20px;
        }
        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.80rem;
            font-weight: 500;
            background: rgba(212,168,83,0.10);
            color: var(--clr-accent);
            border: 1px solid rgba(212,168,83,0.18);
        }

        /* ===== Latest News / CMS List ===== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .news-card {
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            border-color: var(--clr-border-hover);
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
        }
        .news-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: var(--transition);
        }
        .news-card:hover .news-card-img { transform: scale(1.02); }
        .news-card-body {
            padding: 22px 24px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 0.82rem;
            color: var(--clr-text-muted);
            margin-bottom: 10px;
        }
        .news-card-meta .category-badge {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 50px;
            background: rgba(212,168,83,0.12);
            color: var(--clr-accent);
            font-weight: 500;
            font-size: 0.78rem;
        }
        .news-card h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
            line-height: 1.4;
        }
        .news-card h3 a { color: var(--clr-text); }
        .news-card h3 a:hover { color: var(--clr-accent); }
        .news-card p {
            font-size: 0.92rem;
            color: var(--clr-text-muted);
            margin-bottom: 0;
            flex: 1;
        }
        .news-card .read-more {
            margin-top: 16px;
            font-weight: 600;
            font-size: 0.88rem;
            color: var(--clr-accent);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .news-card .read-more:hover { gap: 12px; }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--clr-text-muted);
            font-size: 1.05rem;
            background: var(--clr-bg-card);
            border: 1px dashed var(--clr-border);
            border-radius: var(--radius-md);
        }

        /* ===== Stats / Data ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-card {
            text-align: center;
            padding: 36px 20px;
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            transition: var(--transition);
        }
        .stat-card:hover {
            border-color: var(--clr-border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-sm);
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 900;
            background: linear-gradient(135deg, var(--clr-accent), var(--clr-accent-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-label {
            font-size: 0.92rem;
            color: var(--clr-text-muted);
            margin-top: 6px;
        }

        /* ===== Process / Steps ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            position: relative;
        }
        .process-step {
            text-align: center;
            padding: 36px 24px;
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            transition: var(--transition);
            position: relative;
        }
        .process-step:hover {
            border-color: var(--clr-border-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-sm);
        }
        .step-number {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--clr-accent-dark), var(--clr-accent));
            color: #0d0d1a;
            font-size: 1.4rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
        }
        .process-step h3 { margin-bottom: 10px; }
        .process-step p { font-size: 0.92rem; color: var(--clr-text-muted); margin-bottom: 0; }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--clr-border-hover); }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--clr-text);
            background: transparent;
            text-align: left;
            gap: 16px;
            transition: var(--transition);
        }
        .faq-question:hover { color: var(--clr-accent); }
        .faq-question .faq-icon {
            flex-shrink: 0;
            font-size: 1.1rem;
            transition: var(--transition);
            color: var(--clr-accent);
        }
        .faq-item.open .faq-question .faq-icon { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.40s ease, padding 0.30s ease;
            padding: 0 24px;
            color: var(--clr-text-muted);
            font-size: 0.94rem;
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--clr-primary-light), var(--clr-primary-mid));
            border-top: 1px solid var(--clr-border);
            border-bottom: 1px solid var(--clr-border);
            text-align: center;
            padding: 80px 24px;
        }
        .cta-section h2 { margin-bottom: 16px; }
        .cta-section p {
            max-width: 600px;
            margin: 0 auto 32px;
            color: var(--clr-text-muted);
        }
        .cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--clr-primary);
            border-top: 1px solid var(--clr-border);
            padding: 50px 24px 30px;
        }
        .footer-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 40px;
        }
        .footer-brand .nav-logo {
            position: static;
            transform: none;
            display: inline-block;
            font-size: 1.25rem;
            padding: 0;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 0.90rem;
            color: var(--clr-text-muted);
            max-width: 320px;
            margin-bottom: 16px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--clr-text-muted);
            font-size: 1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--clr-accent);
            color: #0d0d1a;
            border-color: var(--clr-accent);
            transform: translateY(-3px);
        }
        .footer-col h4 {
            font-size: 1rem;
            margin-bottom: 16px;
            color: var(--clr-text);
        }
        .footer-col ul li { margin-bottom: 8px; }
        .footer-col ul li a {
            color: var(--clr-text-muted);
            font-size: 0.90rem;
            transition: var(--transition);
        }
        .footer-col ul li a:hover { color: var(--clr-accent); padding-left: 4px; }
        .footer-bottom {
            max-width: var(--container-max);
            margin: 36px auto 0;
            padding-top: 24px;
            border-top: 1px solid var(--clr-border);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--clr-text-muted);
        }
        .footer-bottom a { color: var(--clr-text-muted); }
        .footer-bottom a:hover { color: var(--clr-accent); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .process-grid { grid-template-columns: repeat(2, 1fr); }
            .news-grid { grid-template-columns: 1fr; }
            .footer-inner { grid-template-columns: 1fr 1fr; }
            .category-card { flex-direction: column; }
            .category-img { flex: 0 0 auto; width: 100%; }
            .category-img img { height: 200px; }
        }

        @media (max-width: 768px) {
            .nav-left, .nav-right { display: none; }
            .nav-toggle { display: block; }
            .mobile-menu { display: flex; }
            .nav-logo { font-size: 1.15rem; padding: 0 12px; }
            .section { padding: 60px 0; }
            .hero { min-height: 70vh; padding: 100px 20px 60px; }
            .hero h1 { font-size: 2rem; }
            .hero p { font-size: 1rem; }
            .features-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .process-grid { grid-template-columns: 1fr; }
            .stat-number { font-size: 2rem; }
            .footer-inner { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .category-card { padding: 24px; }
            .news-card-body { padding: 18px 20px 22px; }
            .btn { padding: 12px 26px; font-size: 0.92rem; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero { padding: 90px 16px 50px; min-height: 60vh; }
            .hero h1 { font-size: 1.7rem; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
            .stat-card { padding: 24px 16px; }
            .stat-number { font-size: 1.7rem; }
            .section-title h2 { font-size: 1.4rem; }
            .faq-question { padding: 14px 18px; font-size: 0.92rem; }
            .footer-inner { gap: 20px; }
            .nav-logo { font-size: 1rem; }
        }

        /* ===== Accessibility ===== */
        :focus-visible {
            outline: 3px solid var(--clr-accent);
            outline-offset: 3px;
        }
        .skip-link {
            position: absolute;
            top: -100px;
            left: 16px;
            background: var(--clr-accent);
            color: #0d0d1a;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            z-index: 10000;
            transition: top 0.30s;
        }
        .skip-link:focus { top: 16px; }

        /* ===== Misc ===== */
        .text-center { text-align: center; }
        .mt-20 { margin-top: 20px; }
        .mb-20 { margin-bottom: 20px; }
        .gap-16 { gap: 16px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .bg-primary-light { background: var(--clr-primary-light); }
        .border-section { border-top: 1px solid var(--clr-border); border-bottom: 1px solid var(--clr-border); }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #c0392b;
            --primary-dark: #a93226;
            --primary-light: #e74c3c;
            --secondary: #f39c12;
            --secondary-light: #f1c40f;
            --accent: #2c3e50;
            --accent-light: #34495e;
            --bg-dark: #0b0e14;
            --bg-dark-card: #131821;
            --bg-dark-surface: #1a212e;
            --bg-light: #f8f9fa;
            --bg-white: #ffffff;
            --text-primary: #ecf0f1;
            --text-secondary: #b0b8c4;
            --text-muted: #7a8599;
            --text-dark: #1a1a2e;
            --text-dark-secondary: #4a4a6a;
            --border-color: rgba(255, 255, 255, 0.08);
            --border-light: #e0e3e8;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.25);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --spacing-section: 80px;
            --container-max: 1200px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-dark);
            min-height: 100vh;
        }

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

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

        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text-primary);
        }

        /* ===== Container ===== */
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .container-wide {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(11, 14, 20, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .site-header.scrolled {
            background: rgba(11, 14, 20, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            height: 72px;
            position: relative;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-left {
            flex: 1;
            justify-content: flex-start;
        }

        .nav-right {
            flex: 1;
            justify-content: flex-end;
        }

        .nav-logo {
            font-size: 22px;
            font-weight: 800;
            letter-spacing: 0.5px;
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
            padding: 0 16px;
            flex-shrink: 0;
            transition: var(--transition);
        }

        .nav-logo:hover {
            opacity: 0.85;
            transform: scale(1.02);
        }

        .nav-link {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-link.active {
            color: var(--text-primary);
            background: rgba(192, 57, 43, 0.18);
            box-shadow: inset 0 0 0 1px rgba(192, 57, 43, 0.25);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--primary-light);
            border-radius: 2px;
        }

        .nav-toggle {
            display: none;
            font-size: 24px;
            color: var(--text-primary);
            padding: 8px 12px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.05);
            transition: var(--transition);
        }

        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.1);
        }

        .mobile-menu {
            display: none;
            flex-direction: column;
            padding: 16px 24px 24px;
            background: rgba(11, 14, 20, 0.98);
            border-top: 1px solid var(--border-color);
            gap: 6px;
        }

        .mobile-menu .nav-link {
            padding: 12px 18px;
            font-size: 16px;
        }

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

        /* ===== Hero / Page Banner ===== */
        .page-banner {
            padding: 140px 0 80px;
            background: linear-gradient(135deg, #0b0e14 0%, #1a212e 50%, #0b0e14 100%);
            position: relative;
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.15;
            pointer-events: none;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-dark), transparent);
            pointer-events: none;
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
            text-align: center;
        }

        .page-banner h1 {
            font-size: 48px;
            font-weight: 800;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #ecf0f1 0%, var(--secondary-light) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .page-banner p {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0 auto;
            line-height: 1.7;
        }

        .breadcrumb {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 10px;
            margin-bottom: 24px;
            font-size: 14px;
            color: var(--text-muted);
        }

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

        .breadcrumb a:hover {
            color: var(--primary-light);
        }

        .breadcrumb span {
            color: var(--text-muted);
        }

        .breadcrumb i {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* ===== Section Common ===== */
        .section {
            padding: var(--spacing-section) 0;
        }

        .section-header {
            text-align: center;
            margin-bottom: 52px;
        }

        .section-header h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .section-header p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
        }

        .section-header .badge {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 20px;
            background: rgba(192, 57, 43, 0.2);
            color: var(--primary-light);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
        }

        /* ===== Guide Grid ===== */
        .guide-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

        .guide-card {
            background: var(--bg-dark-card);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .guide-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: var(--transition);
        }

        .guide-card:hover {
            border-color: rgba(192, 57, 43, 0.3);
            transform: translateY(-6px);
            box-shadow: var(--shadow-md);
        }

        .guide-card:hover::before {
            opacity: 1;
        }

        .guide-card .icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-sm);
            background: rgba(192, 57, 43, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            color: var(--primary-light);
            margin-bottom: 20px;
            transition: var(--transition);
        }

        .guide-card:hover .icon {
            background: rgba(192, 57, 43, 0.25);
            transform: scale(1.05);
        }

        .guide-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

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

        .guide-card .step-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 12px;
            background: rgba(243, 156, 18, 0.15);
            color: var(--secondary);
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 14px;
            letter-spacing: 0.3px;
        }

        /* ===== Feature Details ===== */
        .feature-section {
            background: var(--bg-dark-card);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .feature-list {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px 60px;
        }

        .feature-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }

        .feature-item .num {
            font-size: 32px;
            font-weight: 800;
            color: rgba(192, 57, 43, 0.25);
            line-height: 1;
            min-width: 48px;
            font-feature-settings: "tnum";
        }

        .feature-item h4 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-primary);
        }

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

        /* ===== Image + Text Block ===== */
        .split-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .split-block.reverse {
            direction: rtl;
        }

        .split-block.reverse>* {
            direction: ltr;
        }

        .split-block .text-content h2 {
            font-size: 34px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .split-block .text-content p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 16px;
        }

        .split-block .text-content ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-top: 12px;
        }

        .split-block .text-content ul li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 15px;
            color: var(--text-secondary);
        }

        .split-block .text-content ul li i {
            color: var(--primary-light);
            font-size: 14px;
            width: 20px;
            text-align: center;
        }

        .split-block .image-wrap {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            background: var(--bg-dark-surface);
            aspect-ratio: 4/3;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .split-block .image-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

        .split-block .image-wrap:hover img {
            transform: scale(1.03);
        }

        /* ======== FAQ ======== */
        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-dark-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(192, 57, 43, 0.2);
        }

        .faq-question {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            transition: var(--transition);
            gap: 16px;
        }

        .faq-question i {
            font-size: 14px;
            color: var(--text-muted);
            transition: var(--transition);
            flex-shrink: 0;
        }

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(192, 57, 43, 0.08), rgba(243, 156, 18, 0.06));
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            text-align: center;
        }

        .cta-section h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .cta-section p {
            font-size: 17px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 32px;
        }

        .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            border-color: var(--primary);
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(192, 57, 43, 0.35);
        }

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

        .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.15);
            transform: translateY(-2px);
        }

        .btn i {
            font-size: 16px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark-card);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 0;
        }

        .footer-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
        }

        .footer-brand .nav-logo {
            font-size: 26px;
            padding: 0;
            display: inline-block;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 360px;
        }

        .footer-social {
            display: flex;
            gap: 14px;
            margin-top: 20px;
        }

        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.05);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-secondary);
            font-size: 18px;
            transition: var(--transition);
            border: 1px solid var(--border-color);
        }

        .footer-social a:hover {
            background: rgba(192, 57, 43, 0.2);
            color: var(--primary-light);
            border-color: var(--primary);
            transform: translateY(-3px);
        }

        .footer-col h4 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 18px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: var(--text-muted);
            transition: var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--primary-light);
            padding-left: 4px;
        }

        .footer-bottom {
            max-width: var(--container-max);
            margin: 40px auto 0;
            padding: 20px 24px;
            border-top: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .footer-bottom a {
            color: var(--text-muted);
            transition: var(--transition);
        }

        .footer-bottom a:hover {
            color: var(--primary-light);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .guide-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .feature-list {
                gap: 30px 40px;
            }

            .split-block {
                gap: 40px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --spacing-section: 56px;
            }

            .nav-left,
            .nav-right {
                display: none;
            }

            .nav-toggle {
                display: block;
            }

            .nav-inner {
                justify-content: space-between;
            }

            .nav-logo {
                font-size: 20px;
                padding: 0;
            }

            .page-banner {
                padding: 110px 0 56px;
                min-height: 280px;
            }

            .page-banner h1 {
                font-size: 30px;
            }

            .page-banner p {
                font-size: 16px;
            }

            .section-header h2 {
                font-size: 26px;
            }

            .guide-grid {
                grid-template-columns: 1fr;
            }

            .feature-list {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .split-block {
                grid-template-columns: 1fr;
                gap: 32px;
                direction: ltr !important;
            }

            .split-block.reverse>* {
                direction: ltr;
            }

            .split-block .text-content h2 {
                font-size: 26px;
            }

            .footer-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .btn-group {
                flex-direction: column;
                align-items: center;
            }

            .btn {
                width: 100%;
                max-width: 320px;
                justify-content: center;
            }

            .cta-section h2 {
                font-size: 26px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .page-banner h1 {
                font-size: 24px;
            }

            .section-header h2 {
                font-size: 22px;
            }

            .guide-card {
                padding: 24px 20px;
            }

            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }

            .faq-answer {
                font-size: 14px;
            }
        }

        /* ===== Animations ===== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .animate-in {
            animation: fadeInUp 0.6s ease forwards;
        }

        .delay-1 {
            animation-delay: 0.1s;
        }
        .delay-2 {
            animation-delay: 0.2s;
        }
        .delay-3 {
            animation-delay: 0.3s;
        }
        .delay-4 {
            animation-delay: 0.4s;
        }
        .delay-5 {
            animation-delay: 0.5s;
        }
        .delay-6 {
            animation-delay: 0.6s;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #0f0f2e;
            --primary-light: #1a1a3e;
            --primary-dark: #080820;
            --accent: #d4a853;
            --accent-hover: #e6b95e;
            --accent-dim: rgba(212, 168, 83, 0.15);
            --bg-dark: #080820;
            --bg-card: #12123a;
            --bg-card-hover: #1c1c4a;
            --bg-section: #0c0c2a;
            --text: #f0f0f5;
            --text-muted: #a0a0c0;
            --text-dim: #6a6a8a;
            --border: #2a2a5a;
            --border-light: #3a3a6a;
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.3);
            --shadow-glow: 0 0 40px rgba(212, 168, 83, 0.08);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --max-width: 1200px;
            --header-h: 72px;
        }

        /* ===== Reset & Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text);
            background: var(--bg-dark);
            overflow-x: hidden;
        }
        a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent-hover); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; }
        button, input, textarea { font-family: inherit; font-size: 1rem; outline: none; border: none; }
        button { cursor: pointer; background: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.25; color: var(--text); }
        h1 { font-size: 2.5rem; }
        h2 { font-size: 2rem; }
        h3 { font-size: 1.5rem; }
        h4 { font-size: 1.25rem; }
        p { margin-bottom: 1rem; color: var(--text-muted); }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(8, 8, 32, 0.92);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            height: var(--header-h);
            transition: background var(--transition);
        }
        .site-header.scrolled {
            background: rgba(8, 8, 32, 0.98);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
        }
        .nav-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            height: var(--header-h);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .nav-left, .nav-right {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-link {
            padding: 8px 18px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
            position: relative;
            letter-spacing: 0.3px;
        }
        .nav-link:hover {
            color: var(--accent);
            background: var(--accent-dim);
        }
        .nav-link.active {
            color: var(--accent);
            background: var(--accent-dim);
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .nav-logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--accent);
            letter-spacing: 1px;
            text-transform: uppercase;
            background: linear-gradient(135deg, var(--accent), #f0d080);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
            transition: opacity var(--transition);
        }
        .nav-logo:hover {
            opacity: 0.85;
            color: var(--accent);
        }
        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--text);
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover { background: var(--accent-dim); color: var(--accent); }

        /* Mobile Menu */
        .mobile-menu {
            display: none;
            position: fixed;
            top: var(--header-h);
            left: 0;
            right: 0;
            background: rgba(8, 8, 32, 0.98);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            padding: 16px 24px;
            flex-direction: column;
            gap: 8px;
            transform: translateY(-120%);
            transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            z-index: 999;
        }
        .mobile-menu.open {
            transform: translateY(0);
        }
        .mobile-menu .nav-link {
            display: block;
            padding: 12px 16px;
            font-size: 1.05rem;
            border-radius: var(--radius-sm);
        }

        /* ===== Hero / Banner ===== */
        .article-banner {
            position: relative;
            padding: 140px 0 80px;
            margin-top: 0;
            background: var(--bg-dark);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: center;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.25;
            z-index: 0;
            filter: brightness(0.5) saturate(0.8);
        }
        .article-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(8,8,32,0.92) 0%, rgba(15,15,46,0.7) 50%, rgba(8,8,32,0.92) 100%);
            z-index: 1;
        }
        .banner-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(212,168,83,0.06) 0%, transparent 70%);
            z-index: 1;
        }
        .banner-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }
        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent-dim);
            color: var(--accent);
            padding: 6px 18px;
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
            border: 1px solid rgba(212, 168, 83, 0.2);
        }
        .banner-badge i { font-size: 0.75rem; }
        .banner-title {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
            margin-bottom: 16px;
            text-shadow: 0 2px 20px rgba(0,0,0,0.3);
        }
        .banner-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            color: var(--text-muted);
            font-size: 0.95rem;
            flex-wrap: wrap;
        }
        .banner-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .banner-meta i { color: var(--accent); font-size: 0.85rem; }
        .banner-meta .category-tag {
            background: var(--accent-dim);
            color: var(--accent);
            padding: 2px 14px;
            border-radius: 100px;
            font-size: 0.85rem;
            font-weight: 600;
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: 60px 0 80px;
            background: var(--bg-dark);
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 48px;
            align-items: start;
        }
        .article-body {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 48px;
            box-shadow: var(--shadow);
        }
        .article-body .article-content {
            font-size: 1.05rem;
            line-height: 1.85;
            color: var(--text);
        }
        .article-body .article-content p {
            margin-bottom: 1.4rem;
            color: rgba(240, 240, 245, 0.85);
        }
        .article-body .article-content h2,
        .article-body .article-content h3 {
            margin-top: 2rem;
            margin-bottom: 1rem;
            color: #fff;
        }
        .article-body .article-content h2 { font-size: 1.6rem; }
        .article-body .article-content h3 { font-size: 1.3rem; }
        .article-body .article-content ul,
        .article-body .article-content ol {
            margin-bottom: 1.4rem;
            padding-left: 1.5rem;
            color: rgba(240, 240, 245, 0.85);
        }
        .article-body .article-content ul { list-style: disc; }
        .article-body .article-content ol { list-style: decimal; }
        .article-body .article-content li { margin-bottom: 0.5rem; }
        .article-body .article-content a { color: var(--accent); text-decoration: underline; }
        .article-body .article-content blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 24px;
            margin: 1.5rem 0;
            background: var(--accent-dim);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: rgba(240, 240, 245, 0.8);
        }
        .article-body .article-content img {
            border-radius: var(--radius);
            margin: 1.5rem 0;
            box-shadow: var(--shadow-sm);
        }
        .article-body .article-content code {
            background: var(--primary-light);
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 0.9em;
            color: var(--accent);
        }

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
        }
        .article-not-found i {
            font-size: 4rem;
            color: var(--text-dim);
            margin-bottom: 24px;
        }
        .article-not-found h2 {
            font-size: 2rem;
            color: var(--text);
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-muted);
            margin-bottom: 24px;
            font-size: 1.1rem;
        }
        .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 32px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            border-radius: 100px;
            transition: all var(--transition);
        }
        .btn-back:hover {
            background: var(--accent-hover);
            color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(212,168,83,0.3);
        }

        /* Sidebar */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px;
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            color: var(--accent);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i { font-size: 0.9rem; }
        .sidebar-list li {
            padding: 10px 0;
            border-bottom: 1px solid rgba(42,42,90,0.4);
        }
        .sidebar-list li:last-child { border-bottom: none; }
        .sidebar-list a {
            color: var(--text-muted);
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: all var(--transition);
        }
        .sidebar-list a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .sidebar-list a i { font-size: 0.7rem; color: var(--accent); }
        .sidebar-cta {
            background: linear-gradient(135deg, var(--accent-dim), transparent);
            border: 1px solid rgba(212,168,83,0.2);
        }
        .sidebar-cta p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .sidebar-cta .btn-accent {
            display: block;
            width: 100%;
            text-align: center;
            padding: 10px 20px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            border-radius: 100px;
            transition: all var(--transition);
        }
        .sidebar-cta .btn-accent:hover {
            background: var(--accent-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(212,168,83,0.25);
        }

        /* ===== Related Posts ===== */
        .related-section {
            padding: 60px 0 80px;
            background: var(--bg-section);
        }
        .related-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .related-header h2 {
            font-size: 2rem;
            color: #fff;
            margin-bottom: 12px;
        }
        .related-header p {
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .related-card:hover {
            transform: translateY(-6px);
            border-color: var(--accent);
            box-shadow: var(--shadow), var(--shadow-glow);
            background: var(--bg-card-hover);
        }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body {
            padding: 18px 20px 22px;
        }
        .related-card .card-cat {
            display: inline-block;
            font-size: 0.75rem;
            color: var(--accent);
            background: var(--accent-dim);
            padding: 2px 12px;
            border-radius: 100px;
            margin-bottom: 8px;
            font-weight: 600;
        }
        .related-card .card-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-title a { color: var(--text); }
        .related-card .card-title a:hover { color: var(--accent); }
        .related-card .card-date {
            font-size: 0.85rem;
            color: var(--text-dim);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .related-card .card-date i { font-size: 0.75rem; }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 60px 0 80px;
            background: var(--bg-dark);
        }
        .faq-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .faq-header h2 {
            font-size: 2rem;
            color: #fff;
            margin-bottom: 12px;
        }
        .faq-header p {
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-light);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text);
            background: transparent;
            text-align: left;
            transition: all var(--transition);
            gap: 16px;
        }
        .faq-question:hover { color: var(--accent); }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--accent);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.5s cubic-bezier(0.4, 0, 0.2, 1), padding 0.3s ease;
            padding: 0 24px;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--bg-section);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 50%, rgba(212,168,83,0.05) 0%, transparent 70%);
            z-index: 0;
        }
        .cta-inner {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: 2rem;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-inner p {
            color: var(--text-muted);
            font-size: 1.1rem;
            margin-bottom: 32px;
        }
        .cta-buttons {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 700;
            font-size: 1.05rem;
            border-radius: 100px;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(212,168,83,0.25);
        }
        .btn-primary:hover {
            background: var(--accent-hover);
            color: var(--primary-dark);
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(212,168,83,0.35);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 36px;
            background: transparent;
            color: var(--accent);
            font-weight: 600;
            font-size: 1.05rem;
            border: 2px solid var(--accent);
            border-radius: 100px;
            transition: all var(--transition);
        }
        .btn-secondary:hover {
            background: var(--accent-dim);
            color: var(--accent-hover);
            border-color: var(--accent-hover);
            transform: translateY(-3px);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--primary-dark);
            border-top: 1px solid var(--border);
            padding: 60px 0 0;
        }
        .footer-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
        }
        .footer-brand .nav-logo {
            font-size: 1.5rem;
            display: inline-block;
            margin-bottom: 16px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 20px;
            max-width: 400px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--bg-card);
            color: var(--text-muted);
            font-size: 1.1rem;
            transition: all var(--transition);
            border: 1px solid var(--border);
        }
        .footer-social a:hover {
            background: var(--accent-dim);
            color: var(--accent);
            border-color: var(--accent);
            transform: translateY(-3px);
        }
        .footer-col h4 {
            font-size: 1.05rem;
            color: #fff;
            margin-bottom: 20px;
            font-weight: 600;
        }
        .footer-col ul li {
            margin-bottom: 12px;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.95rem;
            transition: all var(--transition);
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-bottom {
            max-width: var(--max-width);
            margin: 40px auto 0;
            padding: 20px 24px;
            border-top: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-dim);
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover { color: var(--accent); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-inner {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .banner-title { font-size: 2.2rem; }
        }

        @media (max-width: 768px) {
            .nav-left, .nav-right { display: none; }
            .nav-toggle { display: block; }
            .mobile-menu { display: flex; }
            .nav-inner { justify-content: space-between; }
            .nav-logo { font-size: 1.2rem; }

            .article-banner { padding: 110px 0 50px; min-height: 240px; }
            .banner-title { font-size: 1.8rem; }
            .banner-meta { gap: 12px; font-size: 0.85rem; }

            .article-body { padding: 24px; }
            .article-body .article-content { font-size: 1rem; }

            .related-grid { grid-template-columns: 1fr; }
            .related-header h2 { font-size: 1.6rem; }

            .faq-header h2 { font-size: 1.6rem; }
            .faq-question { font-size: 0.95rem; padding: 16px 18px; }

            .cta-inner h2 { font-size: 1.6rem; }
            .btn-primary, .btn-secondary { padding: 12px 28px; font-size: 0.95rem; }

            .footer-inner { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .banner-title { font-size: 1.5rem; }
            .article-body { padding: 16px; border-radius: var(--radius); }
            .related-card .card-img { height: 140px; }
            .cta-buttons { flex-direction: column; width: 100%; }
            .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
        }

        /* ===== Utility ===== */
        .text-accent { color: var(--accent); }
        .text-center { text-align: center; }
        .mt-8 { margin-top: 8px; }
        .mb-8 { margin-bottom: 8px; }
        .gap-8 { gap: 8px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }