/* roulang page: index */
:root {
            --color-primary: #1b1b3a;
            --color-primary-light: #25255a;
            --color-accent: #e94560;
            --color-accent-hover: #d63852;
            --color-gold: #f5c518;
            --color-gold-light: #ffe066;
            --color-bg: #f8f9fc;
            --color-bg-alt: #f0f2f8;
            --color-surface: #ffffff;
            --color-text: #1e1e3f;
            --color-text-weak: #5a5a7a;
            --color-text-muted: #8a8aa8;
            --color-border: #e2e4ef;
            --color-border-light: #eef0f7;
            --color-success: #10b981;
            --color-warning: #f59e0b;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.04);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12), 0 4px 12px rgba(0, 0, 0, 0.06);
            --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.16), 0 8px 20px rgba(0, 0, 0, 0.08);
            --transition-fast: 0.18s ease;
            --transition-base: 0.28s ease;
            --transition-slow: 0.4s cubic-bezier(0.25, 0.8, 0.25, 1.2);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
            --max-width: 1240px;
            --header-height: 68px;
            --bottom-nav-height: 60px;
        }

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

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

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            min-height: 100vh;
            padding-bottom: 0;
        }

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

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

        a:hover {
            color: var(--color-accent);
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            outline: none;
            transition: all var(--transition-base);
        }

        button:focus-visible,
        a:focus-visible,
        input:focus-visible {
            outline: 3px solid rgba(233, 68, 96, 0.45);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        ul,
        ol {
            list-style: none;
        }

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

        /* ========== HEADER ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(27, 27, 58, 0.97);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: box-shadow var(--transition-base);
        }

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

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

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 700;
            color: #ffffff;
            letter-spacing: 0.02em;
            white-space: nowrap;
            transition: opacity var(--transition-fast);
        }

        .logo-link:hover {
            color: #ffffff;
            opacity: 0.88;
        }

        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--color-accent), #ff6b81);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #fff;
            flex-shrink: 0;
        }

        .nav-desktop {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-desktop a {
            color: rgba(255, 255, 255, 0.82);
            font-size: 0.95rem;
            font-weight: 500;
            letter-spacing: 0.01em;
            position: relative;
            padding: 6px 0;
            transition: color var(--transition-fast);
        }

        .nav-desktop a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--color-accent);
            border-radius: 1px;
            transition: width var(--transition-base);
        }

        .nav-desktop a:hover,
        .nav-desktop a.active {
            color: #ffffff;
        }

        .nav-desktop a:hover::after,
        .nav-desktop a.active::after {
            width: 100%;
        }

        .nav-cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--color-accent);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            letter-spacing: 0.02em;
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .nav-cta-btn:hover {
            background: var(--color-accent-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(233, 68, 96, 0.4);
        }

        /* ========== BOTTOM NAV (Mobile) ========== */
        .bottom-nav {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 999;
            background: rgba(27, 27, 58, 0.98);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            height: var(--bottom-nav-height);
            padding: 0 8px;
            padding-bottom: env(safe-area-inset-bottom, 0);
        }

        .bottom-nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-around;
            height: 100%;
            max-width: 500px;
            margin: 0 auto;
        }

        .bottom-nav-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 3px;
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.7rem;
            font-weight: 500;
            padding: 6px 12px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            min-width: 56px;
            text-align: center;
        }

        .bottom-nav-item i {
            font-size: 1.25rem;
            transition: transform var(--transition-fast);
        }

        .bottom-nav-item.active {
            color: #ffffff;
        }

        .bottom-nav-item.active i {
            color: var(--color-accent);
            transform: scale(1.1);
        }

        .bottom-nav-item:hover {
            color: rgba(255, 255, 255, 0.85);
        }

        .bottom-nav-item:active {
            transform: scale(0.94);
        }

        /* ========== HERO ========== */
        .hero-section {
            position: relative;
            background: linear-gradient(160deg, #1b1b3a 0%, #25255a 30%, #1a1a3e 60%, #0f0f2d 100%);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            min-height: 580px;
            display: flex;
            align-items: center;
            padding: 40px 0 60px;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(233, 68, 96, 0.25) 0%, transparent 65%),
                radial-gradient(ellipse at 70% 30%, rgba(245, 197, 24, 0.12) 0%, transparent 55%);
            pointer-events: none;
        }

        .hero-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .hero-content {
            color: #ffffff;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(245, 197, 24, 0.18);
            border: 1px solid rgba(245, 197, 24, 0.35);
            color: var(--color-gold-light);
            border-radius: 50px;
            font-size: 0.82rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 18px;
        }

        .hero-content h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: 0.01em;
            margin-bottom: 16px;
            color: #ffffff;
        }

        .hero-content h1 .highlight {
            color: var(--color-accent);
        }

        .hero-content .hero-subtitle {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.75);
            line-height: 1.7;
            margin-bottom: 28px;
            max-width: 480px;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            letter-spacing: 0.02em;
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--color-accent);
            color: #fff;
        }

        .btn-primary:hover {
            background: var(--color-accent-hover);
            color: #fff;
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(233, 68, 96, 0.45);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.4);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.7);
            color: #fff;
            transform: translateY(-3px);
        }

        .btn-sm {
            padding: 9px 18px;
            font-size: 0.85rem;
            border-radius: 50px;
        }

        .hero-visual {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-card-stack {
            position: relative;
            width: 100%;
            max-width: 420px;
        }

        .hero-floating-card {
            background: rgba(255, 255, 255, 0.07);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: var(--radius-lg);
            padding: 24px;
            color: #fff;
            box-shadow: var(--shadow-xl);
        }

        .hero-floating-card .stat-row {
            display: flex;
            gap: 20px;
            margin-top: 14px;
        }

        .hero-floating-card .stat-item {
            text-align: center;
            flex: 1;
        }

        .hero-floating-card .stat-value {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--color-gold);
        }

        .hero-floating-card .stat-label {
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 2px;
        }

        /* ========== SECTIONS ========== */
        .section {
            padding: 72px 0;
        }

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

        .section-dark {
            background: var(--color-primary);
            color: #ffffff;
        }

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

        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: 0.01em;
            color: var(--color-text);
            margin-bottom: 10px;
        }

        .section-dark .section-header h2 {
            color: #ffffff;
        }

        .section-header .section-subtitle {
            color: var(--color-text-weak);
            font-size: 1rem;
            max-width: 560px;
            margin: 0 auto;
        }

        .section-dark .section-header .section-subtitle {
            color: rgba(255, 255, 255, 0.65);
        }

        /* ========== FEATURES GRID ========== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
            text-align: center;
        }

        .feature-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--color-border);
        }

        .feature-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 1.5rem;
            color: #fff;
        }

        .feature-icon.red {
            background: linear-gradient(135deg, #e94560, #ff6b81);
        }
        .feature-icon.blue {
            background: linear-gradient(135deg, #4a6cf7, #6b8aff);
        }
        .feature-icon.green {
            background: linear-gradient(135deg, #10b981, #34d399);
        }
        .feature-icon.gold {
            background: linear-gradient(135deg, #f59e0b, #fbbf24);
        }

        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text);
        }

        .feature-card p {
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.6;
        }

        /* ========== CATEGORY ENTRY ========== */
        .category-entry-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            background: var(--color-surface);
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
        }

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

        .category-entry-visual {
            position: relative;
            min-height: 300px;
            overflow: hidden;
        }

        .category-entry-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .category-entry-card:hover .category-entry-visual img {
            transform: scale(1.04);
        }

        .category-entry-body {
            padding: 40px 32px 40px 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        .category-entry-body .tag {
            display: inline-block;
            padding: 5px 14px;
            background: rgba(233, 68, 96, 0.1);
            color: var(--color-accent);
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            margin-bottom: 14px;
            width: fit-content;
        }

        .category-entry-body h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        .category-entry-body p {
            color: var(--color-text-weak);
            margin-bottom: 20px;
            line-height: 1.7;
        }

        /* ========== STATS BAND ========== */
        .stats-band {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            text-align: center;
        }

        .stat-card {
            padding: 28px 20px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-lg);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .stat-card .stat-number {
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--color-gold);
            letter-spacing: 0.02em;
            margin-bottom: 4px;
        }

        .stat-card .stat-desc {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.65);
        }

        /* ========== NEWS LIST ========== */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .news-card {
            background: var(--color-surface);
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
        }

        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }

        .news-card-img {
            position: relative;
            height: 190px;
            overflow: hidden;
        }

        .news-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .news-card:hover .news-card-img img {
            transform: scale(1.06);
        }

        .news-card-img .news-category-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 12px;
            background: var(--color-accent);
            color: #fff;
            border-radius: 50px;
            font-size: 0.72rem;
            font-weight: 600;
            letter-spacing: 0.03em;
        }

        .news-card-body {
            padding: 18px 20px 22px;
        }

        .news-card-body h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .news-card-body h4 a:hover {
            color: var(--color-accent);
        }

        .news-card-body .news-excerpt {
            font-size: 0.85rem;
            color: var(--color-text-weak);
            line-height: 1.5;
            margin-bottom: 10px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card-body .news-meta {
            font-size: 0.78rem;
            color: var(--color-text-muted);
            display: flex;
            gap: 12px;
            align-items: center;
        }

        .news-empty {
            text-align: center;
            padding: 48px 20px;
            color: var(--color-text-muted);
            font-size: 0.95rem;
            grid-column: 1 / -1;
        }

        /* ========== PROCESS / FLOW ========== */
        .process-list {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .process-item {
            text-align: center;
            position: relative;
            padding: 24px 16px;
        }

        .process-step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--color-accent);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 700;
            margin: 0 auto 14px;
        }

        .process-item h4 {
            font-weight: 700;
            margin-bottom: 6px;
            font-size: 1rem;
        }

        .process-item p {
            font-size: 0.85rem;
            color: var(--color-text-weak);
        }

        .section-dark .process-item p {
            color: rgba(255, 255, 255, 0.6);
        }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--color-surface);
            border-radius: var(--radius-md);
            border: 1px solid var(--color-border-light);
            padding: 20px 24px;
            cursor: pointer;
            transition: all var(--transition-base);
        }

        .faq-item:hover {
            border-color: var(--color-border);
            box-shadow: var(--shadow-md);
        }

        .faq-item summary {
            font-weight: 600;
            font-size: 1rem;
            color: var(--color-text);
            outline: none;
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary .faq-icon {
            flex-shrink: 0;
            transition: transform var(--transition-fast);
            color: var(--color-text-muted);
            font-size: 0.85rem;
        }

        .faq-item[open] summary .faq-icon {
            transform: rotate(180deg);
            color: var(--color-accent);
        }

        .faq-answer {
            margin-top: 12px;
            font-size: 0.9rem;
            color: var(--color-text-weak);
            line-height: 1.7;
            padding-top: 12px;
            border-top: 1px solid var(--color-border-light);
        }

        /* ========== CTA ========== */
        .cta-section {
            text-align: center;
            padding: 72px 0;
        }

        .cta-inner {
            background: linear-gradient(135deg, #1b1b3a 0%, #2a2a5a 100%);
            border-radius: var(--radius-xl);
            padding: 56px 40px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-inner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 50% 0%, rgba(233, 68, 96, 0.3) 0%, transparent 60%);
            pointer-events: none;
        }

        .cta-inner h2 {
            font-size: 1.8rem;
            font-weight: 700;
            margin-bottom: 12px;
            position: relative;
        }

        .cta-inner p {
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 24px;
            position: relative;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-inner .btn-primary {
            position: relative;
            font-size: 1rem;
            padding: 15px 36px;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #0f0f28;
            color: rgba(255, 255, 255, 0.7);
            padding: 48px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 36px;
            margin-bottom: 36px;
        }

        .footer-brand .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: #ffffff;
            margin-bottom: 10px;
            display: block;
        }

        .footer-brand p {
            font-size: 0.85rem;
            line-height: 1.6;
        }

        .footer-col h4 {
            color: #ffffff;
            font-weight: 600;
            font-size: 0.95rem;
            margin-bottom: 14px;
        }

        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li a {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            text-align: center;
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.45);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 32px;
                text-align: center;
            }
            .hero-content .hero-subtitle {
                max-width: 100%;
            }
            .hero-buttons {
                justify-content: center;
            }
            .hero-visual {
                order: -1;
            }
            .hero-floating-card {
                max-width: 320px;
                margin: 0 auto;
            }
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-band {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-list {
                grid-template-columns: repeat(2, 1fr);
            }
            .category-entry-card {
                grid-template-columns: 1fr;
            }
            .category-entry-visual {
                min-height: 220px;
            }
            .category-entry-body {
                padding: 28px 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            .bottom-nav {
                display: block;
            }
            body {
                padding-bottom: var(--bottom-nav-height);
            }
            .site-header {
                height: 56px;
            }
            .logo-link {
                font-size: 1.15rem;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
                font-size: 1rem;
            }
            .hero-section {
                min-height: 440px;
                padding: 24px 0 40px;
            }
            .hero-content h1 {
                font-size: 1.9rem;
            }
            .hero-content .hero-subtitle {
                font-size: 0.95rem;
            }
            .section {
                padding: 48px 0;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .news-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .stats-band {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .process-list {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .cta-inner {
                padding: 36px 20px;
            }
            .cta-inner h2 {
                font-size: 1.4rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .btn {
                padding: 11px 22px;
                font-size: 0.88rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-content h1 {
                font-size: 1.55rem;
            }
            .stats-band {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .stat-card .stat-number {
                font-size: 1.8rem;
            }
            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }
            .btn {
                width: 100%;
                justify-content: center;
            }
            .category-entry-visual {
                min-height: 180px;
            }
            .faq-item {
                padding: 16px 18px;
            }
        }

/* roulang page: article */
:root {
            --primary-dark: #0d1117;
            --primary: #161b22;
            --primary-light: #1c2333;
            --accent: #f78166;
            --accent-hover: #e86b4f;
            --accent-glow: rgba(247,129,102,0.25);
            --gold: #f0b94d;
            --gold-light: #fcd683;
            --bg: #f4f5f7;
            --bg-alt: #eef0f4;
            --card: #ffffff;
            --card-dark: #1e2533;
            --text: #1a1d23;
            --text-secondary: #5c6068;
            --text-muted: #8b8f98;
            --text-light: #c8ccd4;
            --text-on-dark: #e8eaef;
            --border: #dce0e6;
            --border-light: #eaecf0;
            --radius-sm: 8px;
            --radius: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-md: 0 8px 28px rgba(0,0,0,0.10);
            --shadow-lg: 0 14px 40px rgba(0,0,0,0.13);
            --shadow-glow: 0 0 32px var(--accent-glow);
            --font-sans: 'Segoe UI','PingFang SC','Microsoft YaHei','Helvetica Neue',sans-serif;
            --font-mono: 'SF Mono','Cascadia Code','Consolas','monospace';
            --header-h: 68px;
            --bottom-nav-h: 62px;
            --transition-fast: 0.18s ease;
            --transition: 0.28s ease;
            --transition-slow: 0.4s ease;
        }
        *,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
        html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
        body{
            font-family:var(--font-sans);
            font-size:16px;
            line-height:1.7;
            color:var(--text);
            background:var(--bg);
            -webkit-font-smoothing:antialiased;
            -moz-osx-font-smoothing:grayscale;
            padding-bottom:0;
        }
        img{max-width:100%;height:auto;display:block}
        a{color:var(--accent);text-decoration:none;transition:color var(--transition-fast)}
        a:hover{color:var(--accent-hover)}
        button,input,select,textarea{font-family:inherit;font-size:inherit}
        h1,h2,h3,h4,h5,h6{line-height:1.3;font-weight:700;color:var(--text)}
        ul,ol{list-style:none}
        .container{width:100%;max-width:1140px;margin:0 auto;padding:0 24px}

        /* Header */
        .site-header{
            position:sticky;top:0;z-index:100;
            background:var(--primary-dark);
            border-bottom:1px solid rgba(255,255,255,0.06);
            height:var(--header-h);
            display:flex;align-items:center;
            backdrop-filter:blur(12px);
            -webkit-backdrop-filter:blur(12px);
        }
        .header-inner{
            width:100%;max-width:1140px;margin:0 auto;padding:0 24px;
            display:flex;align-items:center;justify-content:space-between;
            height:100%;
        }
        .logo-link{
            display:flex;align-items:center;gap:10px;
            font-size:1.25rem;font-weight:700;color:#fff;
            letter-spacing:-0.01em;
        }
        .logo-link:hover{color:var(--gold-light)}
        .logo-icon{
            width:40px;height:40px;border-radius:var(--radius-sm);
            background:linear-gradient(135deg,var(--accent),var(--gold));
            display:flex;align-items:center;justify-content:center;
            font-size:1.1rem;color:#fff;
        }
        .nav-desktop{display:flex;align-items:center;gap:6px}
        .nav-desktop a{
            padding:8px 16px;border-radius:var(--radius-sm);
            font-size:0.93rem;font-weight:500;color:var(--text-on-dark);
            transition:all var(--transition-fast);
            white-space:nowrap;
        }
        .nav-desktop a:hover{background:rgba(255,255,255,0.06);color:#fff}
        .nav-desktop a.active{background:rgba(255,255,255,0.1);color:var(--gold-light);font-weight:600}
        .nav-cta-btn{
            background:linear-gradient(135deg,var(--accent),#e86b4f) !important;
            color:#fff !important;font-weight:600 !important;
            padding:9px 20px !important;border-radius:var(--radius) !important;
            margin-left:8px;
            box-shadow:0 2px 10px var(--accent-glow);
        }
        .nav-cta-btn:hover{
            box-shadow:0 4px 18px var(--accent-glow);
            transform:translateY(-1px);
        }

        /* Breadcrumb */
        .breadcrumb-wrap{
            background:var(--card);
            border-bottom:1px solid var(--border-light);
            padding:12px 0;
        }
        .breadcrumb{
            display:flex;align-items:center;gap:8px;flex-wrap:wrap;
            font-size:0.88rem;color:var(--text-muted);
        }
        .breadcrumb a{color:var(--text-secondary)}
        .breadcrumb a:hover{color:var(--accent)}
        .breadcrumb .sep{color:var(--border);font-size:0.7rem}
        .breadcrumb .current{color:var(--accent);font-weight:600}

        /* Article Banner */
        .article-banner{
            position:relative;
            background:var(--primary) url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding:60px 0 50px;
            min-height:200px;
            display:flex;align-items:center;
        }
        .article-banner::before{
            content:'';position:absolute;inset:0;
            background:linear-gradient(180deg,rgba(13,17,23,0.82) 0%,rgba(22,27,34,0.9) 100%);
        }
        .article-banner .container{position:relative;z-index:2}
        .article-banner-tag{
            display:inline-flex;align-items:center;gap:6px;
            padding:6px 14px;border-radius:20px;
            background:rgba(255,255,255,0.12);
            color:var(--gold-light);font-size:0.82rem;font-weight:600;
            margin-bottom:16px;
            backdrop-filter:blur(6px);
            border:1px solid rgba(255,255,255,0.1);
        }
        .article-banner h1{
            color:#fff;font-size:2.2rem;font-weight:800;
            letter-spacing:-0.01em;text-shadow:0 2px 12px rgba(0,0,0,0.3);
        }
        .article-meta-row{
            display:flex;flex-wrap:wrap;gap:16px 28px;margin-top:14px;
            color:var(--text-light);font-size:0.9rem;
        }
        .article-meta-row span{display:flex;align-items:center;gap:6px}

        /* Main Layout */
        .article-main{padding:48px 0 56px}
        .article-grid{display:grid;grid-template-columns:1fr;max-width:860px;margin:0 auto;gap:0}

        /* Article Card */
        .article-card{
            background:var(--card);
            border-radius:var(--radius-lg);
            padding:40px 44px;
            box-shadow:var(--shadow);
            border:1px solid var(--border-light);
        }
        .article-card .article-body{
            font-size:1.05rem;line-height:1.85;color:var(--text);
        }
        .article-body h2{
            font-size:1.5rem;margin:32px 0 14px;padding-bottom:8px;
            border-bottom:2px solid var(--border-light);
            color:var(--primary-dark);
        }
        .article-body h3{font-size:1.2rem;margin:24px 0 10px;color:var(--primary)}
        .article-body p{margin-bottom:16px}
        .article-body ul,.article-body ol{margin:12px 0 16px 22px;list-style:disc}
        .article-body ol{list-style:decimal}
        .article-body li{margin-bottom:6px}
        .article-body img{border-radius:var(--radius);margin:20px 0;box-shadow:var(--shadow-sm)}
        .article-body blockquote{
            border-left:4px solid var(--accent);padding:14px 20px;
            margin:20px 0;background:var(--bg-alt);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
            color:var(--text-secondary);font-style:italic;
        }
        .article-body code{
            background:var(--bg-alt);padding:2px 7px;border-radius:4px;
            font-family:var(--font-mono);font-size:0.9em;color:#d63384;
        }
        .article-body pre{
            background:var(--primary-dark);color:var(--text-on-dark);
            padding:20px 24px;border-radius:var(--radius);overflow-x:auto;
            margin:18px 0;font-family:var(--font-mono);font-size:0.9rem;
            line-height:1.6;
        }
        .article-body pre code{background:none;padding:0;color:inherit;}
        .article-body table{width:100%;border-collapse:collapse;margin:18px 0}
        .article-body th,.article-body td{
            border:1px solid var(--border);padding:10px 14px;text-align:left;
        }
        .article-body th{background:var(--bg-alt);font-weight:700}

        /* Not Found */
        .not-found-card{
            background:var(--card);border-radius:var(--radius-lg);
            padding:56px 40px;text-align:center;
            box-shadow:var(--shadow);border:1px solid var(--border-light);
        }
        .not-found-card .nf-icon{
            font-size:4rem;color:var(--text-muted);margin-bottom:16px;
        }
        .not-found-card h2{font-size:1.6rem;margin-bottom:8px}
        .not-found-card p{color:var(--text-secondary);margin-bottom:20px}

        /* Article Actions */
        .article-actions{
            display:flex;flex-wrap:wrap;gap:12px;
            margin-top:28px;padding-top:20px;
            border-top:1px solid var(--border-light);
        }
        .btn{
            display:inline-flex;align-items:center;gap:7px;
            padding:10px 22px;border-radius:var(--radius);
            font-weight:600;font-size:0.95rem;cursor:pointer;border:none;
            transition:all var(--transition-fast);text-decoration:none;
        }
        .btn-primary{
            background:linear-gradient(135deg,var(--accent),#e86b4f);
            color:#fff;box-shadow:0 3px 12px var(--accent-glow);
        }
        .btn-primary:hover{box-shadow:0 6px 22px var(--accent-glow);transform:translateY(-2px);color:#fff}
        .btn-outline{
            background:transparent;border:2px solid var(--border);
            color:var(--text);padding:8px 20px;
        }
        .btn-outline:hover{border-color:var(--accent);color:var(--accent);background:rgba(247,129,102,0.04)}
        .btn-ghost{
            background:var(--bg-alt);color:var(--text-secondary);
            padding:8px 18px;border-radius:var(--radius-sm);
        }
        .btn-ghost:hover{background:var(--border-light);color:var(--text)}

        /* CTA Section */
        .cta-section{
            background:var(--primary-dark);
            padding:52px 0;
            margin-top:0;
            position:relative;
            overflow:hidden;
        }
        .cta-section::before{
            content:'';position:absolute;top:-60px;right:-60px;
            width:260px;height:260px;border-radius:50%;
            background:var(--accent-glow);filter:blur(80px);opacity:0.5;
        }
        .cta-inner{
            position:relative;z-index:2;text-align:center;
            max-width:640px;margin:0 auto;
        }
        .cta-inner h3{font-size:1.6rem;color:#fff;margin-bottom:8px}
        .cta-inner p{color:var(--text-light);margin-bottom:22px;font-size:1rem}
        .cta-inner .btn-primary{font-size:1rem;padding:12px 30px;border-radius:var(--radius-lg)}

        /* Footer */
        .site-footer{
            background:var(--primary-dark);
            border-top:1px solid rgba(255,255,255,0.06);
            padding:48px 0 20px;
            color:var(--text-on-dark);
        }
        .footer-grid{
            display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;
            gap:36px;margin-bottom:32px;
        }
        .footer-brand .footer-logo{
            font-size:1.25rem;font-weight:700;color:var(--gold-light);
            display:block;margin-bottom:8px;
        }
        .footer-brand p{color:var(--text-light);font-size:0.9rem;line-height:1.7}
        .footer-col h4{color:#fff;font-size:0.95rem;margin-bottom:14px;font-weight:700}
        .footer-col ul{display:flex;flex-direction:column;gap:8px}
        .footer-col a{color:var(--text-light);font-size:0.88rem;transition:color var(--transition-fast)}
        .footer-col a:hover{color:var(--gold-light)}
        .footer-bottom{
            border-top:1px solid rgba(255,255,255,0.08);
            padding-top:18px;text-align:center;
            font-size:0.82rem;color:var(--text-muted);
        }

        /* Bottom Mobile Nav */
        .bottom-nav{
            display:none;position:fixed;bottom:0;left:0;right:0;z-index:99;
            background:var(--card);border-top:1px solid var(--border);
            height:var(--bottom-nav-h);
            box-shadow:0 -3px 16px rgba(0,0,0,0.07);
        }
        .bottom-nav-inner{
            display:flex;align-items:center;justify-content:space-around;
            height:100%;max-width:500px;margin:0 auto;
        }
        .bottom-nav a{
            display:flex;flex-direction:column;align-items:center;gap:3px;
            font-size:0.68rem;font-weight:500;color:var(--text-muted);
            padding:6px 10px;border-radius:var(--radius-sm);
            transition:all var(--transition-fast);
        }
        .bottom-nav a i{font-size:1.25rem}
        .bottom-nav a.active{color:var(--accent);font-weight:700}
        .bottom-nav a:hover{color:var(--accent)}

        /* Responsive */
        @media(max-width:1024px){
            .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
            .article-card{padding:32px 28px}
            .article-banner h1{font-size:1.8rem}
        }
        @media(max-width:768px){
            .nav-desktop{display:none}
            .bottom-nav{display:block}
            body{padding-bottom:var(--bottom-nav-h)}
            .article-banner{padding:44px 0 36px;min-height:160px}
            .article-banner h1{font-size:1.45rem}
            .article-card{padding:24px 18px;border-radius:var(--radius)}
            .article-body{font-size:1rem}
            .article-body h2{font-size:1.25rem}
            .article-main{padding:28px 0 36px}
            .container{padding:0 16px}
            .header-inner{padding:0 16px}
            .footer-grid{grid-template-columns:1fr 1fr;gap:20px}
            .cta-section{padding:36px 0}
            .cta-inner h3{font-size:1.3rem}
            .article-meta-row{gap:10px 16px;font-size:0.82rem}
            .btn{padding:9px 16px;font-size:0.88rem}
        }
        @media(max-width:520px){
            .footer-grid{grid-template-columns:1fr;gap:20px}
            .article-banner h1{font-size:1.25rem}
            .article-card{padding:18px 14px}
            .article-body{font-size:0.95rem}
            .article-body h2{font-size:1.15rem}
            .article-banner{padding:32px 0 28px;min-height:130px}
            .breadcrumb{font-size:0.78rem}
            .article-actions{flex-direction:column;gap:8px}
            .article-actions .btn{width:100%;justify-content:center}
            .not-found-card{padding:40px 20px}
            .logo-link span{font-size:1.05rem}
            .logo-icon{width:34px;height:34px;font-size:0.95rem}
        }

/* roulang page: category1 */
:root {
            --primary: #6c3cf0;
            --primary-dark: #5828d6;
            --primary-light: #8b5cf6;
            --primary-glow: rgba(108, 60, 240, 0.25);
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-glow: rgba(245, 158, 11, 0.3);
            --bg-dark: #0b0b18;
            --bg-card: #141428;
            --bg-card-hover: #1a1a35;
            --bg-section-alt: #f5f6fa;
            --bg-section-dark: #0f0f1f;
            --surface: #1e1e36;
            --text-primary: #f1f1f7;
            --text-secondary: #b0b0c8;
            --text-muted: #7a7a9e;
            --text-dark: #1a1a2e;
            --text-dark-secondary: #555570;
            --white: #ffffff;
            --border: #2a2a45;
            --border-light: #e2e4ea;
            --radius-sm: 8px;
            --radius: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.15);
            --shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
            --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.3);
            --shadow-card: 0 2px 16px rgba(0, 0, 0, 0.18);
            --shadow-card-hover: 0 8px 32px rgba(108, 60, 240, 0.2);
            --transition-fast: 0.18s ease;
            --transition: 0.3s ease;
            --transition-slow: 0.45s ease;
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
            --max-width: 1260px;
            --header-height: 72px;
            --bottom-tab-height: 60px;
        }

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

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

        body {
            font-family: var(--font-sans);
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-dark);
            min-height: 100vh;
            overflow-x: hidden;
            padding-bottom: 0;
        }

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

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

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

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        ul,
        ol {
            list-style: none;
        }

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

        /* ========== HEADER ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(11, 11, 24, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            height: var(--header-height);
            display: flex;
            align-items: center;
            transition: background var(--transition), box-shadow var(--transition);
        }

        .site-header.scrolled {
            background: rgba(11, 11, 24, 0.96);
            box-shadow: 0 2px 24px rgba(0, 0, 0, 0.4);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            gap: 32px;
        }

        .logo-link {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--white);
            letter-spacing: 0.02em;
            white-space: nowrap;
            transition: color var(--transition-fast);
        }

        .logo-link:hover {
            color: var(--accent-light);
        }

        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: var(--white);
            font-size: 1.1rem;
            box-shadow: 0 0 18px var(--primary-glow);
            flex-shrink: 0;
        }

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

        .nav-desktop a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 18px;
            border-radius: 24px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            white-space: nowrap;
            position: relative;
        }

        .nav-desktop a:hover {
            color: var(--white);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-desktop a.active {
            color: var(--white);
            background: rgba(108, 60, 240, 0.2);
            font-weight: 600;
        }

        .nav-desktop a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 2px;
            background: var(--accent);
        }

        .nav-cta-btn {
            background: linear-gradient(135deg, var(--accent), #e68900) !important;
            color: #1a1a0a !important;
            font-weight: 600 !important;
            padding: 9px 22px !important;
            border-radius: 24px !important;
            box-shadow: 0 4px 16px var(--accent-glow);
            margin-left: 4px;
        }

        .nav-cta-btn:hover {
            box-shadow: 0 6px 24px rgba(245, 158, 11, 0.45) !important;
            transform: translateY(-1px);
            background: linear-gradient(135deg, var(--accent-light), var(--accent)) !important;
            color: #1a1a0a !important;
        }

        /* ========== MOBILE BOTTOM TAB ========== */
        .bottom-tab-nav {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 999;
            background: rgba(14, 14, 28, 0.94);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid var(--border);
            height: var(--bottom-tab-height);
            padding: 0 8px;
            justify-content: space-around;
            align-items: center;
        }

        .bottom-tab-nav a {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 4px;
            font-size: 0.7rem;
            font-weight: 500;
            color: var(--text-muted);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            min-width: 56px;
            text-align: center;
            position: relative;
        }

        .bottom-tab-nav a i {
            font-size: 1.25rem;
            transition: transform var(--transition-fast);
        }

        .bottom-tab-nav a.active {
            color: var(--accent);
            font-weight: 600;
        }

        .bottom-tab-nav a.active i {
            transform: scale(1.1);
        }

        .bottom-tab-nav a.active::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 28px;
            height: 3px;
            border-radius: 0 0 3px 3px;
            background: var(--accent);
        }

        .bottom-tab-nav a:hover {
            color: var(--white);
        }

        /* ========== PAGE BANNER ========== */
        .page-banner {
            position: relative;
            min-height: 340px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            background: var(--bg-dark) url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 11, 24, 0.7) 0%, rgba(11, 11, 24, 0.85) 60%, rgba(11, 11, 24, 0.95) 100%);
            z-index: 1;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at center, rgba(108, 60, 240, 0.15) 0%, transparent 70%);
            z-index: 2;
        }

        .banner-content {
            position: relative;
            z-index: 3;
            padding: 60px 24px 50px;
            max-width: 700px;
        }

        .banner-badge {
            display: inline-block;
            padding: 6px 18px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            background: rgba(245, 158, 11, 0.15);
            color: var(--accent-light);
            border: 1px solid rgba(245, 158, 11, 0.3);
            margin-bottom: 18px;
            letter-spacing: 0.03em;
        }

        .banner-content h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--white);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
            line-height: 1.25;
        }

        .banner-content h1 .highlight {
            background: linear-gradient(135deg, var(--accent), #fcd34d);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .banner-content p {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 24px;
        }

        .banner-stats {
            display: flex;
            gap: 28px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .banner-stat {
            text-align: center;
        }

        .banner-stat .stat-num {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--white);
            line-height: 1;
        }

        .banner-stat .stat-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ========== BREADCRUMB ========== */
        .breadcrumb-wrap {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

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

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

        .breadcrumb .sep {
            color: var(--text-muted);
            font-size: 0.7rem;
        }

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

        /* ========== SECTION TITLES ========== */
        .section-header {
            text-align: center;
            margin-bottom: 40px;
        }

        .section-header .section-badge {
            display: inline-block;
            padding: 5px 16px;
            border-radius: 16px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(108, 60, 240, 0.15);
            color: var(--primary-light);
            letter-spacing: 0.04em;
            margin-bottom: 12px;
        }

        .section-header h2 {
            font-size: 1.9rem;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 8px;
            letter-spacing: 0.01em;
        }

        .section-header p {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto;
        }

        /* ========== FILTER TAGS ========== */
        .filter-tags-section {
            padding: 40px 0 20px;
            background: var(--bg-dark);
        }

        .filter-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }

        .filter-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            border-radius: 22px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: var(--bg-card);
            border: 1px solid var(--border);
            cursor: pointer;
            transition: all var(--transition-fast);
            white-space: nowrap;
            user-select: none;
        }

        .filter-tag:hover {
            color: var(--white);
            border-color: var(--primary-light);
            background: rgba(108, 60, 240, 0.1);
        }

        .filter-tag.active {
            color: var(--white);
            background: var(--primary);
            border-color: var(--primary);
            font-weight: 600;
            box-shadow: 0 4px 16px var(--primary-glow);
        }

        .filter-tag .tag-count {
            font-size: 0.75rem;
            opacity: 0.7;
        }

        /* ========== ARTICLE GRID ========== */
        .articles-section {
            padding: 40px 0 60px;
            background: var(--bg-dark);
        }

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

        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .article-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(108, 60, 240, 0.4);
            background: var(--bg-card-hover);
        }

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

        .article-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-slow);
        }

        .article-card:hover .card-img-wrap img {
            transform: scale(1.06);
        }

        .article-card .card-img-wrap .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 12px;
            border-radius: 14px;
            font-size: 0.75rem;
            font-weight: 600;
            background: rgba(0, 0, 0, 0.65);
            color: var(--accent-light);
            backdrop-filter: blur(6px);
            letter-spacing: 0.03em;
            z-index: 2;
        }

        .article-card .card-img-wrap .card-difficulty {
            position: absolute;
            top: 12px;
            right: 12px;
            padding: 4px 10px;
            border-radius: 12px;
            font-size: 0.7rem;
            font-weight: 600;
            background: rgba(0, 0, 0, 0.6);
            color: #fff;
            backdrop-filter: blur(6px);
            z-index: 2;
        }

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

        .article-card .card-body h3 {
            font-size: 1.08rem;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition-fast);
        }

        .article-card:hover .card-body h3 {
            color: var(--accent-light);
        }

        .article-card .card-body .card-excerpt {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
            flex: 1;
        }

        .article-card .card-body .card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        .article-card .card-body .card-meta span {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* ========== HOT RANKING ========== */
        .ranking-section {
            padding: 56px 0 64px;
            background: var(--bg-section-dark);
            position: relative;
        }

        .ranking-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border), transparent);
        }

        .ranking-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
            margin: 0 auto;
        }

        .ranking-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .ranking-item:hover {
            border-color: rgba(108, 60, 240, 0.5);
            background: var(--bg-card-hover);
            transform: translateX(4px);
            box-shadow: var(--shadow-sm);
        }

        .ranking-item .rank-num {
            font-size: 1.5rem;
            font-weight: 800;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
            color: var(--text-muted);
            background: rgba(255, 255, 255, 0.03);
        }

        .ranking-item:nth-child(1) .rank-num {
            color: #f59e0b;
            background: rgba(245, 158, 11, 0.12);
            font-size: 1.8rem;
        }

        .ranking-item:nth-child(2) .rank-num {
            color: #c0c0c0;
            background: rgba(192, 192, 192, 0.1);
            font-size: 1.7rem;
        }

        .ranking-item:nth-child(3) .rank-num {
            color: #cd7f32;
            background: rgba(205, 127, 50, 0.1);
            font-size: 1.6rem;
        }

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

        .ranking-item .rank-info h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--white);
            margin-bottom: 3px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .ranking-item .rank-info .rank-desc {
            font-size: 0.8rem;
            color: var(--text-muted);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .ranking-item .rank-stats {
            display: flex;
            gap: 16px;
            font-size: 0.78rem;
            color: var(--text-muted);
            flex-shrink: 0;
        }

        .ranking-item .rank-stats i {
            margin-right: 3px;
        }

        /* ========== TIPS SECTION ========== */
        .tips-section {
            padding: 56px 0 60px;
            background: var(--bg-dark);
        }

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

        .tip-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px 20px;
            text-align: center;
            border: 1px solid var(--border);
            transition: all var(--transition-fast);
        }

        .tip-card:hover {
            border-color: rgba(108, 60, 240, 0.45);
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }

        .tip-card .tip-icon {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            font-size: 1.4rem;
            background: rgba(108, 60, 240, 0.12);
            color: var(--primary-light);
        }

        .tip-card h4 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--white);
            margin-bottom: 6px;
        }

        .tip-card p {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: 56px 0 64px;
            background: var(--bg-section-dark);
        }

        .faq-list {
            max-width: 760px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

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

        .faq-item:hover {
            border-color: rgba(108, 60, 240, 0.4);
        }

        .faq-question {
            padding: 18px 22px;
            font-weight: 600;
            font-size: 0.98rem;
            color: var(--white);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            user-select: none;
            transition: color var(--transition-fast);
        }

        .faq-question:hover {
            color: var(--accent-light);
        }

        .faq-question .faq-icon {
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: transform var(--transition);
            flex-shrink: 0;
        }

        .faq-item.open .faq-question .faq-icon {
            transform: rotate(180deg);
            color: var(--accent);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition), padding var(--transition);
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 22px 18px;
        }

        .faq-answer p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 60px 0 64px;
            background: var(--bg-dark);
            text-align: center;
        }

        .cta-card {
            background: linear-gradient(135deg, var(--primary), #4c1d95);
            border-radius: var(--radius-xl);
            padding: 48px 32px;
            position: relative;
            overflow: hidden;
            box-shadow: 0 12px 48px rgba(108, 60, 240, 0.3);
        }

        .cta-card::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            pointer-events: none;
        }

        .cta-card::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -40px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.03);
            pointer-events: none;
        }

        .cta-card h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--white);
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }

        .cta-card p {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.75);
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
            max-width: 500px;
            margin-left: auto;
            margin-right: auto;
        }

        .cta-card .cta-buttons {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 26px;
            font-size: 0.95rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            transition: all var(--transition);
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--accent);
            color: #1a1a0a;
            box-shadow: 0 4px 18px var(--accent-glow);
        }

        .btn-primary:hover {
            background: var(--accent-light);
            box-shadow: 0 6px 28px rgba(245, 158, 11, 0.5);
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            color: var(--white);
            border: 2px solid rgba(255, 255, 255, 0.4);
        }

        .btn-outline:hover {
            border-color: var(--white);
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-2px);
        }

        .btn:focus-visible {
            outline: 3px solid var(--accent-light);
            outline-offset: 3px;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border);
            padding: 48px 0 24px;
            color: var(--text-secondary);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-brand .footer-logo {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--white);
            display: block;
            margin-bottom: 10px;
        }

        .footer-brand p {
            font-size: 0.85rem;
            line-height: 1.6;
            color: var(--text-muted);
        }

        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--white);
            margin-bottom: 12px;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul li a {
            font-size: 0.84rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 18px;
            text-align: center;
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .articles-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
            }

            .tips-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

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

            .banner-content h1 {
                font-size: 2.2rem;
            }

            .page-banner {
                min-height: 280px;
            }
        }

        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }

            .bottom-tab-nav {
                display: flex;
            }

            body {
                padding-bottom: var(--bottom-tab-height);
            }

            .site-header {
                height: 56px;
            }

            .logo-link {
                font-size: 1.05rem;
            }

            .logo-icon {
                width: 34px;
                height: 34px;
                font-size: 0.9rem;
            }

            .page-banner {
                min-height: 240px;
            }

            .banner-content {
                padding: 40px 20px 36px;
            }

            .banner-content h1 {
                font-size: 1.7rem;
            }

            .banner-content p {
                font-size: 0.9rem;
            }

            .banner-stats {
                gap: 16px;
            }

            .banner-stat .stat-num {
                font-size: 1.3rem;
            }

            .articles-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .tips-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .ranking-item {
                flex-wrap: wrap;
                gap: 10px;
                padding: 14px 16px;
            }

            .ranking-item .rank-stats {
                width: 100%;
                justify-content: flex-start;
            }

            .filter-tags {
                gap: 8px;
            }

            .filter-tag {
                padding: 6px 14px;
                font-size: 0.8rem;
            }

            .cta-card {
                padding: 32px 20px;
            }

            .cta-card h2 {
                font-size: 1.4rem;
            }

            .section-header h2 {
                font-size: 1.5rem;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .footer-brand {
                text-align: center;
            }

            .footer-col {
                text-align: center;
            }

            .container {
                padding: 0 16px;
            }

            .header-inner {
                padding: 0 16px;
            }
        }

        @media (max-width: 520px) {
            .banner-content h1 {
                font-size: 1.45rem;
            }

            .banner-content p {
                font-size: 0.82rem;
            }

            .banner-stats {
                gap: 10px;
            }

            .banner-stat .stat-num {
                font-size: 1.1rem;
            }

            .banner-stat .stat-label {
                font-size: 0.7rem;
            }

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

            .filter-tag {
                padding: 5px 11px;
                font-size: 0.75rem;
                border-radius: 16px;
            }

            .article-card .card-body {
                padding: 14px 14px 16px;
            }

            .article-card .card-body h3 {
                font-size: 0.95rem;
            }

            .btn {
                padding: 10px 20px;
                font-size: 0.85rem;
                border-radius: 22px;
            }

            .bottom-tab-nav a {
                font-size: 0.65rem;
                padding: 4px 6px;
                min-width: 44px;
            }

            .bottom-tab-nav a i {
                font-size: 1.1rem;
            }
        }