/* roulang page: index */
/* ===== Design Variables ===== */
        :root {
            --color-bg: #0a0e1a;
            --color-bg-alt: #101626;
            --color-bg-card: #141c2b;
            --color-bg-nav: #080b14;
            --color-bg-footer: #060912;
            --color-primary: #d4a84b;
            --color-primary-hover: #e0b85e;
            --color-primary-dim: rgba(212, 168, 75, 0.12);
            --color-accent: #00d4ff;
            --color-accent-hover: #33ddff;
            --color-accent-dim: rgba(0, 212, 255, 0.10);
            --color-danger: #ff4757;
            --color-danger-hover: #ff6b7a;
            --color-text: #f0f2f5;
            --color-text-secondary: #b0b8c8;
            --color-text-muted: #6b7485;
            --color-border: #1e2a3a;
            --color-border-light: #2a3a4e;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.45);
            --shadow-card-hover: 0 16px 48px rgba(0, 0, 0, 0.6);
            --shadow-btn: 0 4px 20px rgba(212, 168, 75, 0.3);
            --shadow-btn-hover: 0 8px 30px rgba(212, 168, 75, 0.45);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 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;
            -moz-osx-font-smoothing: grayscale;
        }
        body {
            font-family: var(--font-sans);
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.65;
            font-size: 16px;
            overflow-x: hidden;
        }
        a {
            color: var(--color-accent);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover,
        a:focus-visible {
            color: var(--color-accent-hover);
            outline: none;
        }
        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
            border-radius: 2px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-md);
        }
        button,
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
            color: inherit;
            transition: var(--transition);
        }
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--color-text);
        }
        p {
            margin-bottom: 1rem;
            color: var(--color-text-secondary);
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section-padding {
            padding: 80px 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 56px 0;
            }
            .container {
                padding: 0 16px;
            }
        }

        /* ===== Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(8, 11, 20, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(30, 42, 58, 0.5);
            height: var(--nav-height);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(6, 9, 18, 0.97);
            border-bottom-color: rgba(212, 168, 75, 0.2);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 800;
            color: var(--color-primary);
            letter-spacing: 0.5px;
            white-space: nowrap;
        }
        .nav-logo i {
            font-size: 28px;
            color: var(--color-accent);
        }
        .nav-logo:hover {
            color: var(--color-primary-hover);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            display: block;
            padding: 8px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text-secondary);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            position: relative;
        }
        .nav-links a:hover {
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.04);
        }
        .nav-links a.active {
            color: var(--color-primary);
            background: var(--color-primary-dim);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
        }
        .nav-cta {
            margin-left: 12px;
        }
        .nav-cta .btn-primary {
            padding: 10px 28px;
            font-size: 15px;
            font-weight: 600;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--color-primary), #c49a3f);
            color: #0a0e1a;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: var(--shadow-btn);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .nav-cta .btn-primary:hover {
            background: linear-gradient(135deg, var(--color-primary-hover), #d4a84b);
            box-shadow: var(--shadow-btn-hover);
            transform: translateY(-2px) scale(1.02);
        }
        .nav-cta .btn-primary:active {
            transform: translateY(0) scale(0.98);
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--color-text);
            font-size: 28px;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: var(--transition);
        }
        .nav-toggle:hover {
            color: var(--color-primary);
            background: rgba(255, 255, 255, 0.04);
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        /* Mobile Nav */
        .mobile-nav {
            display: none;
            position: fixed;
            top: var(--nav-height);
            left: 0;
            right: 0;
            background: rgba(6, 9, 18, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--color-border);
            padding: 20px 24px 28px;
            z-index: 999;
            flex-direction: column;
            gap: 12px;
            transform: translateY(-10px);
            opacity: 0;
            transition: var(--transition);
            pointer-events: none;
        }
        .mobile-nav.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: all;
            display: flex;
        }
        .mobile-nav a {
            display: block;
            padding: 14px 18px;
            font-size: 17px;
            font-weight: 500;
            color: var(--color-text-secondary);
            border-radius: var(--radius-sm);
            transition: var(--transition);
            border-left: 3px solid transparent;
        }
        .mobile-nav a:hover {
            color: var(--color-text);
            background: rgba(255, 255, 255, 0.04);
            border-left-color: var(--color-primary);
        }
        .mobile-nav a.active {
            color: var(--color-primary);
            background: var(--color-primary-dim);
            border-left-color: var(--color-primary);
        }
        .mobile-nav .nav-cta-mobile {
            margin-top: 8px;
        }
        .mobile-nav .nav-cta-mobile .btn-primary {
            width: 100%;
            justify-content: center;
            padding: 14px 28px;
            font-size: 16px;
            font-weight: 600;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--color-primary), #c49a3f);
            color: #0a0e1a;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            box-shadow: var(--shadow-btn);
        }
        .mobile-nav .nav-cta-mobile .btn-primary:hover {
            background: linear-gradient(135deg, var(--color-primary-hover), #d4a84b);
            box-shadow: var(--shadow-btn-hover);
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .nav-inner {
                padding: 0 16px;
            }
            .nav-logo {
                font-size: 18px;
            }
            .nav-logo i {
                font-size: 22px;
            }
        }
        @media (min-width: 769px) {
            .mobile-nav {
                display: none !important;
            }
        }

        /* ===== Hero ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 120px 24px 80px;
            background: var(--color-bg);
            overflow: hidden;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            opacity: 0.35;
            z-index: 0;
            filter: saturate(1.2) brightness(0.6);
        }
        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 14, 26, 0.6) 0%, rgba(10, 14, 26, 0.92) 100%);
            z-index: 1;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(212, 168, 75, 0.08) 0%, transparent 70%),
                radial-gradient(ellipse at 70% 30%, rgba(0, 212, 255, 0.05) 0%, transparent 60%);
            z-index: 2;
        }
        .hero-content {
            position: relative;
            z-index: 3;
            text-align: center;
            max-width: 820px;
            margin: 0 auto;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 20px;
            border-radius: 50px;
            background: var(--color-primary-dim);
            border: 1px solid rgba(212, 168, 75, 0.25);
            font-size: 14px;
            font-weight: 500;
            color: var(--color-primary);
            margin-bottom: 28px;
            letter-spacing: 0.3px;
        }
        .hero-badge i {
            font-size: 14px;
        }
        .hero h1 {
            font-size: clamp(36px, 6vw, 64px);
            font-weight: 800;
            line-height: 1.15;
            color: var(--color-text);
            margin-bottom: 20px;
            letter-spacing: -0.5px;
        }
        .hero h1 span {
            color: var(--color-primary);
            background: linear-gradient(135deg, var(--color-primary), #ecc67a);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-subtitle {
            font-size: clamp(16px, 2vw, 22px);
            color: var(--color-text-secondary);
            margin-bottom: 36px;
            line-height: 1.6;
            max-width: 680px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            align-items: center;
        }
        .hero-actions .btn-primary {
            padding: 16px 40px;
            font-size: 17px;
            font-weight: 700;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--color-primary), #c49a3f);
            color: #0a0e1a;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: var(--shadow-btn);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .hero-actions .btn-primary:hover {
            background: linear-gradient(135deg, var(--color-primary-hover), #d4a84b);
            box-shadow: var(--shadow-btn-hover);
            transform: translateY(-3px) scale(1.02);
        }
        .hero-actions .btn-primary:active {
            transform: translateY(0) scale(0.98);
        }
        .hero-actions .btn-secondary {
            padding: 16px 36px;
            font-size: 17px;
            font-weight: 600;
            border-radius: 50px;
            background: transparent;
            color: var(--color-text);
            border: 1.5px solid var(--color-border-light);
            cursor: pointer;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .hero-actions .btn-secondary:hover {
            border-color: var(--color-primary);
            color: var(--color-primary);
            background: var(--color-primary-dim);
            transform: translateY(-2px);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 32px 56px;
            justify-content: center;
            margin-top: 52px;
            padding: 24px 32px;
            background: rgba(20, 28, 43, 0.6);
            border-radius: var(--radius-lg);
            border: 1px solid rgba(30, 42, 58, 0.6);
            backdrop-filter: blur(8px);
        }
        .hero-stat-item {
            text-align: center;
        }
        .hero-stat-item .number {
            font-size: 28px;
            font-weight: 800;
            color: var(--color-primary);
            display: block;
            line-height: 1.2;
        }
        .hero-stat-item .label {
            font-size: 14px;
            color: var(--color-text-muted);
            margin-top: 4px;
        }

        @media (max-width: 768px) {
            .hero {
                min-height: 90vh;
                padding: 100px 16px 60px;
            }
            .hero-stats {
                gap: 20px 32px;
                padding: 18px 20px;
                margin-top: 36px;
                flex-wrap: wrap;
            }
            .hero-stat-item .number {
                font-size: 22px;
            }
            .hero-stat-item .label {
                font-size: 13px;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                font-size: 15px;
                padding: 14px 28px;
            }
        }
        @media (max-width: 480px) {
            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }
        }

        /* ===== Section Titles ===== */
        .section-title {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-title h2 {
            font-size: clamp(28px, 3.6vw, 42px);
            font-weight: 800;
            color: var(--color-text);
            margin-bottom: 12px;
            letter-spacing: -0.3px;
        }
        .section-title p {
            font-size: 17px;
            color: var(--color-text-secondary);
            max-width: 620px;
            margin: 0 auto;
            line-height: 1.6;
        }
        .section-title .badge-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 16px;
            border-radius: 50px;
            background: var(--color-accent-dim);
            border: 1px solid rgba(0, 212, 255, 0.15);
            font-size: 13px;
            font-weight: 500;
            color: var(--color-accent);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }

        /* ===== Features ===== */
        .features {
            background: var(--color-bg-alt);
            position: relative;
        }
        .features::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--color-border-light), transparent);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 32px 24px 28px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            opacity: 0;
            transition: var(--transition);
        }
        .feature-card:hover {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-card);
            transform: translateY(-6px);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--color-primary);
            background: var(--color-primary-dim);
            margin-bottom: 18px;
            transition: var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: rgba(212, 168, 75, 0.2);
            transform: scale(1.05);
        }
        .feature-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 10px;
        }
        .feature-card p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.6;
            margin-bottom: 0;
        }
        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 520px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .feature-card {
                padding: 24px 18px 22px;
            }
        }

        /* ===== Events / Hot Matches ===== */
        .events {
            background: var(--color-bg);
        }
        .events-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .event-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            cursor: pointer;
        }
        .event-card:hover {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-8px);
        }
        .event-card .event-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            display: block;
            transition: var(--transition);
        }
        .event-card:hover .event-img {
            transform: scale(1.03);
        }
        .event-card .event-body {
            padding: 20px 22px 24px;
        }
        .event-card .event-tag {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 50px;
            font-size: 12px;
            font-weight: 600;
            background: var(--color-accent-dim);
            color: var(--color-accent);
            border: 1px solid rgba(0, 212, 255, 0.12);
            margin-bottom: 10px;
        }
        .event-card .event-tag.hot {
            background: rgba(255, 71, 87, 0.12);
            color: var(--color-danger);
            border-color: rgba(255, 71, 87, 0.15);
        }
        .event-card .event-tag.featured {
            background: var(--color-primary-dim);
            color: var(--color-primary);
            border-color: rgba(212, 168, 75, 0.15);
        }
        .event-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
            line-height: 1.3;
        }
        .event-card p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
        }
        .event-card .event-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--color-text-muted);
        }
        .event-card .event-meta i {
            color: var(--color-primary);
            margin-right: 4px;
            font-size: 12px;
        }
        @media (max-width: 1024px) {
            .events-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 560px) {
            .events-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .event-card .event-body {
                padding: 16px 16px 20px;
            }
        }

        /* ===== News / CMS List ===== */
        .news {
            background: var(--color-bg-alt);
            position: relative;
        }
        .news::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--color-border-light), transparent);
        }
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 860px;
            margin: 0 auto;
        }
        .news-item {
            display: flex;
            align-items: flex-start;
            gap: 20px;
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            transition: var(--transition);
        }
        .news-item:hover {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-card);
            transform: translateX(4px);
        }
        .news-item .news-num {
            flex-shrink: 0;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--color-primary-dim);
            color: var(--color-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            font-weight: 700;
        }
        .news-item .news-content {
            flex: 1;
            min-width: 0;
        }
        .news-item .news-content h3 {
            font-size: 17px;
            font-weight: 600;
            color: var(--color-text);
            margin-bottom: 6px;
            line-height: 1.3;
        }
        .news-item .news-content h3 a {
            color: var(--color-text);
            transition: var(--transition);
        }
        .news-item .news-content h3 a:hover {
            color: var(--color-primary);
        }
        .news-item .news-content p {
            font-size: 14px;
            color: var(--color-text-secondary);
            margin-bottom: 8px;
            line-height: 1.5;
        }
        .news-item .news-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 13px;
            color: var(--color-text-muted);
        }
        .news-item .news-meta .cat {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 2px 10px;
            border-radius: 50px;
            background: var(--color-accent-dim);
            color: var(--color-accent);
            font-size: 12px;
            font-weight: 500;
        }
        .news-empty {
            text-align: center;
            padding: 48px 24px;
            color: var(--color-text-muted);
            font-size: 16px;
            background: var(--color-bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--color-border);
        }
        .news-empty i {
            font-size: 36px;
            color: var(--color-text-muted);
            margin-bottom: 16px;
            display: block;
        }
        @media (max-width: 640px) {
            .news-item {
                flex-direction: column;
                gap: 12px;
                padding: 16px 18px;
            }
            .news-item .news-num {
                width: 30px;
                height: 30px;
                font-size: 12px;
            }
            .news-item .news-content h3 {
                font-size: 16px;
            }
        }

        /* ===== Stats / Social Proof ===== */
        .stats-section {
            background: var(--color-bg);
            position: relative;
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            text-align: center;
        }
        .stat-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            padding: 32px 20px 28px;
            transition: var(--transition);
        }
        .stat-card:hover {
            border-color: var(--color-border-light);
            box-shadow: var(--shadow-card);
            transform: translateY(-4px);
        }
        .stat-card .stat-icon {
            font-size: 32px;
            color: var(--color-primary);
            margin-bottom: 12px;
        }
        .stat-card .stat-number {
            font-size: 36px;
            font-weight: 800;
            color: var(--color-text);
            line-height: 1.2;
            display: block;
        }
        .stat-card .stat-number span {
            color: var(--color-primary);
        }
        .stat-card .stat-label {
            font-size: 15px;
            color: var(--color-text-secondary);
            margin-top: 6px;
        }
        @media (max-width: 900px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
        }
        @media (max-width: 480px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .stat-card {
                padding: 22px 14px 20px;
            }
            .stat-card .stat-number {
                font-size: 28px;
            }
        }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--color-bg-alt);
            position: relative;
        }
        .faq-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--color-border-light), transparent);
        }
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--color-border-light);
        }
        .faq-item.open {
            border-color: rgba(212, 168, 75, 0.25);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 22px;
            background: none;
            border: none;
            cursor: pointer;
            font-size: 16px;
            font-weight: 500;
            color: var(--color-text);
            text-align: left;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--color-primary);
        }
        .faq-question:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: -2px;
        }
        .faq-question i {
            font-size: 16px;
            color: var(--color-primary);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 22px 18px;
            font-size: 15px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        @media (max-width: 640px) {
            .faq-question {
                padding: 14px 16px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 14px;
            }
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-bg);
            position: relative;
            padding: 80px 0;
        }
        .cta-box {
            background: linear-gradient(135deg, #141c2b, #1a2540);
            border-radius: var(--radius-lg);
            padding: 56px 48px;
            text-align: center;
            border: 1px solid rgba(212, 168, 75, 0.12);
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(ellipse at 30% 50%, rgba(212, 168, 75, 0.06) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 50%, rgba(0, 212, 255, 0.04) 0%, transparent 50%);
            z-index: 0;
        }
        .cta-box>* {
            position: relative;
            z-index: 1;
        }
        .cta-box h2 {
            font-size: clamp(26px, 3.2vw, 38px);
            font-weight: 800;
            color: var(--color-text);
            margin-bottom: 16px;
        }
        .cta-box p {
            font-size: 17px;
            color: var(--color-text-secondary);
            max-width: 540px;
            margin: 0 auto 32px;
            line-height: 1.6;
        }
        .cta-box .btn-primary {
            padding: 16px 44px;
            font-size: 18px;
            font-weight: 700;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--color-primary), #c49a3f);
            color: #0a0e1a;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: var(--shadow-btn);
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .cta-box .btn-primary:hover {
            background: linear-gradient(135deg, var(--color-primary-hover), #d4a84b);
            box-shadow: var(--shadow-btn-hover);
            transform: translateY(-3px) scale(1.02);
        }
        .cta-box .btn-primary:active {
            transform: translateY(0) scale(0.98);
        }
        .cta-box .cta-trust {
            margin-top: 20px;
            font-size: 14px;
            color: var(--color-text-muted);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .cta-box .cta-trust i {
            color: var(--color-accent);
            margin-right: 6px;
        }
        @media (max-width: 640px) {
            .cta-box {
                padding: 36px 20px;
                border-radius: var(--radius-md);
            }
            .cta-box .btn-primary {
                font-size: 16px;
                padding: 14px 32px;
            }
            .cta-box .cta-trust {
                font-size: 13px;
                gap: 12px;
            }
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-bg-footer);
            border-top: 1px solid var(--color-border);
            padding: 56px 0 32px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand h3 {
            font-size: 20px;
            font-weight: 800;
            color: var(--color-primary);
            margin-bottom: 12px;
        }
        .footer-brand h3 i {
            color: var(--color-accent);
            margin-right: 8px;
        }
        .footer-brand p {
            font-size: 14px;
            color: var(--color-text-secondary);
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 16px;
            letter-spacing: 0.3px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 14px;
            color: var(--color-text-secondary);
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a:hover {
            color: var(--color-primary);
            transform: translateX(4px);
        }
        .footer-col ul li a i {
            font-size: 10px;
            color: var(--color-primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--color-border);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 14px;
            color: var(--color-text-muted);
        }
        .footer-bottom a {
            color: var(--color-text-secondary);
        }
        .footer-bottom a:hover {
            color: var(--color-primary);
        }
        .footer-bottom .social-links {
            display: flex;
            gap: 14px;
        }
        .footer-bottom .social-links a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--color-border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: var(--color-text-secondary);
            transition: var(--transition);
        }
        .footer-bottom .social-links a:hover {
            background: var(--color-primary-dim);
            border-color: var(--color-primary);
            color: var(--color-primary);
            transform: translateY(-2px);
        }

        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 560px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .site-footer {
                padding: 40px 0 24px;
            }
        }

        /* ===== Utility ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-8 {
            gap: 8px;
        }
        .gap-12 {
            gap: 12px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .sr-only {
            position: absolute;
            width: 1px;
            height: 1px;
            padding: 0;
            margin: -1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
            border: 0;
        }

        /* ===== Foundation Overrides ===== */
        .row {
            max-width: var(--container-max);
        }
        .columns,
        .column {
            padding-left: 12px;
            padding-right: 12px;
        }
        @media print {
            .site-header,
            .mobile-nav,
            .nav-toggle,
            .hero-bg,
            .hero-overlay {
                display: none !important;
            }
            body {
                background: #fff;
                color: #222;
            }
            .hero {
                min-height: auto;
                padding: 40px 0;
            }
        }

/* roulang page: category1 */
/* ===== Design Variables ===== */
        :root {
            --primary: #ff6b35;
            --primary-dark: #e0552a;
            --primary-light: #ff8a5c;
            --primary-glow: rgba(255, 107, 53, 0.35);
            --secondary: #0f1923;
            --secondary-light: #1a2a3a;
            --accent: #00d4ff;
            --accent-dark: #00a8cc;
            --bg-dark: #0b1016;
            --bg-card: #131e2b;
            --bg-card-hover: #1a2c3d;
            --text-light: #f0f4f8;
            --text-muted: #8a9bb5;
            --text-body: #c8d6e5;
            --border-color: rgba(255, 107, 53, 0.15);
            --border-glow: rgba(0, 212, 255, 0.2);
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
            --shadow-hover: 0 16px 48px rgba(255, 107, 53, 0.25);
            --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 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;
            font-size: 16px;
        }

        body {
            font-family: var(--font-family);
            background: var(--bg-dark);
            color: var(--text-body);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color var(--transition);
        }
        a:hover,
        a:focus {
            color: var(--primary-light);
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            color: var(--text-light);
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 0.5rem;
        }

        p {
            margin-bottom: 1rem;
        }

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

        /* ===== Site Header / Nav ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--header-h);
            background: rgba(11, 16, 22, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            transition: background var(--transition), border-color var(--transition);
        }

        .site-header.scrolled {
            background: rgba(11, 16, 22, 0.98);
            border-color: var(--border-glow);
        }

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

        .nav-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: 0.5px;
            transition: color var(--transition);
            flex-shrink: 0;
        }
        .nav-logo i {
            color: var(--primary);
            font-size: 1.5rem;
        }
        .nav-logo:hover {
            color: var(--primary-light);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-wrap: nowrap;
        }
        .nav-links a {
            color: var(--text-muted);
            font-weight: 500;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            transition: background var(--transition), color var(--transition);
            font-size: 0.95rem;
            white-space: nowrap;
            position: relative;
        }
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%) scaleX(0);
            width: 60%;
            height: 3px;
            background: var(--primary);
            border-radius: 4px;
            transition: transform var(--transition);
        }
        .nav-links a:hover {
            color: var(--text-light);
            background: rgba(255, 107, 53, 0.08);
        }
        .nav-links a:hover::after {
            transform: translateX(-50%) scaleX(1);
        }
        .nav-links a.active {
            color: var(--text-light);
            background: rgba(255, 107, 53, 0.12);
        }
        .nav-links a.active::after {
            transform: translateX(-50%) scaleX(1);
            background: var(--primary);
        }

        .nav-cta {
            margin-left: 12px;
        }
        .nav-cta .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 10px 24px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            border: none;
            cursor: pointer;
            transition: transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 4px 20px var(--primary-glow);
            white-space: nowrap;
        }
        .nav-cta .btn-primary:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 8px 32px var(--primary-glow);
            color: #fff;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
        }
        .nav-cta .btn-primary:active {
            transform: scale(0.96);
        }
        .nav-cta .btn-primary i {
            font-size: 0.85rem;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-light);
            font-size: 1.6rem;
            cursor: pointer;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover {
            background: rgba(255, 255, 255, 0.06);
        }
        .nav-toggle:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* ===== Mobile Nav Overlay ===== */
        @media (max-width: 820px) {
            .nav-links {
                position: fixed;
                top: var(--header-h);
                left: 0;
                right: 0;
                background: rgba(11, 16, 22, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 24px 20px 32px;
                gap: 6px;
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: transform 0.5s cubic-bezier(0.23, 1, 0.32, 1), opacity 0.4s ease;
                border-bottom: 2px solid var(--border-color);
                max-height: calc(100vh - var(--header-h));
                overflow-y: auto;
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
                box-shadow: var(--shadow);
            }
            .nav-links.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-links a {
                font-size: 1.1rem;
                padding: 14px 20px;
                width: 100%;
                text-align: center;
                border-radius: var(--radius-sm);
            }
            .nav-links a::after {
                display: none;
            }
            .nav-links a.active {
                background: rgba(255, 107, 53, 0.18);
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 12px;
                width: 100%;
            }
            .nav-cta .btn-primary {
                width: 100%;
                justify-content: center;
                padding: 14px 24px;
            }
            .nav-toggle {
                display: block;
            }
        }

        @media (max-width: 480px) {
            .nav-logo {
                font-size: 1.15rem;
                gap: 6px;
            }
            .nav-logo i {
                font-size: 1.2rem;
            }
            .nav-inner {
                padding: 0 16px;
            }
        }

        /* ===== Hero / Banner ===== */
        .category-hero {
            position: relative;
            padding: 140px 0 100px;
            margin-top: var(--header-h);
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            isolation: isolate;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 16, 22, 0.92) 30%, rgba(15, 25, 35, 0.7) 70%, rgba(0, 212, 255, 0.15) 100%);
            z-index: 1;
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-dark), transparent);
            z-index: 2;
        }
        .category-hero .container {
            position: relative;
            z-index: 3;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 107, 53, 0.15);
            border: 1px solid rgba(255, 107, 53, 0.3);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            color: var(--primary-light);
            font-weight: 600;
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            font-size: 0.75rem;
        }
        .category-hero h1 {
            font-size: clamp(2.4rem, 6vw, 4rem);
            font-weight: 900;
            line-height: 1.1;
            margin-bottom: 20px;
            max-width: 780px;
            text-shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
        }
        .category-hero h1 span {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero p {
            font-size: 1.15rem;
            color: var(--text-muted);
            max-width: 640px;
            margin-bottom: 32px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }
        .hero-actions .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 16px 36px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.05rem;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            border: none;
            cursor: pointer;
            transition: transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 6px 28px var(--primary-glow);
            text-decoration: none;
        }
        .hero-actions .btn-primary:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 12px 44px var(--primary-glow);
            color: #fff;
        }
        .hero-actions .btn-secondary {
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-light);
            padding: 16px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1.05rem;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            border: 1px solid rgba(255, 255, 255, 0.12);
            cursor: pointer;
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
            text-decoration: none;
            backdrop-filter: blur(4px);
        }
        .hero-actions .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.25);
            transform: translateY(-2px);
            color: var(--text-light);
        }

        @media (max-width: 768px) {
            .category-hero {
                padding: 120px 0 80px;
            }
            .category-hero h1 {
                font-size: 2rem;
            }
            .category-hero p {
                font-size: 1rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                justify-content: center;
                text-align: center;
            }
        }

        /* ===== Section Common ===== */
        section {
            padding: 88px 0;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .section-label i {
            font-size: 0.75rem;
        }
        .section-title {
            font-size: clamp(1.8rem, 3.6vw, 2.8rem);
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 680px;
            margin-bottom: 48px;
            line-height: 1.8;
        }
        .text-center .section-subtitle {
            margin-left: auto;
            margin-right: auto;
        }
        .text-center {
            text-align: center;
        }

        @media (max-width: 768px) {
            section {
                padding: 60px 0;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-subtitle {
                font-size: 1rem;
                margin-bottom: 32px;
            }
        }

        /* ===== Cards Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 28px;
        }
        .card-grid.cols-4 {
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        }
        @media (max-width: 640px) {
            .card-grid {
                grid-template-columns: 1fr;
            }
        }

        .event-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
            display: flex;
            flex-direction: column;
        }
        .event-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-glow);
        }
        .event-card .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            background: var(--secondary-light);
        }
        .event-card .card-body {
            padding: 24px 22px 26px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .event-card .card-tag {
            display: inline-block;
            background: rgba(255, 107, 53, 0.12);
            color: var(--primary-light);
            font-size: 0.75rem;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 50px;
            margin-bottom: 12px;
            letter-spacing: 0.5px;
            align-self: flex-start;
        }
        .event-card h3 {
            font-size: 1.25rem;
            margin-bottom: 10px;
            font-weight: 700;
        }
        .event-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 16px;
            flex: 1;
            line-height: 1.7;
        }
        .event-card .card-meta {
            display: flex;
            align-items: center;
            gap: 18px;
            font-size: 0.85rem;
            color: var(--text-muted);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding-top: 14px;
            margin-top: auto;
        }
        .event-card .card-meta i {
            color: var(--primary);
            margin-right: 4px;
            width: 16px;
        }
        .event-card .card-link {
            color: var(--accent);
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition), color var(--transition);
        }
        .event-card .card-link:hover {
            gap: 12px;
            color: var(--primary-light);
        }

        /* ===== Features / How It Works ===== */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
            gap: 32px;
        }
        @media (max-width: 640px) {
            .features-grid {
                grid-template-columns: 1fr;
            }
        }

        .feature-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 36px 28px;
            border: 1px solid var(--border-color);
            transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
            text-align: center;
        }
        .feature-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: var(--border-glow);
        }
        .feature-item .icon-wrap {
            width: 68px;
            height: 68px;
            border-radius: 50%;
            background: rgba(255, 107, 53, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.8rem;
            color: var(--primary);
            border: 1px solid rgba(255, 107, 53, 0.15);
            transition: background var(--transition), transform var(--transition);
        }
        .feature-item:hover .icon-wrap {
            background: rgba(255, 107, 53, 0.18);
            transform: scale(1.05);
        }
        .feature-item h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
        }
        .feature-item p {
            font-size: 0.95rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.7;
        }

        /* ===== Process / Steps ===== */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 20px;
            position: relative;
        }
        .process-step {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            border: 1px solid var(--border-color);
            text-align: center;
            position: relative;
            transition: transform var(--transition), border-color var(--transition);
        }
        .process-step:hover {
            transform: translateY(-4px);
            border-color: var(--border-glow);
        }
        .process-step .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            font-weight: 800;
            margin: 0 auto 16px;
            box-shadow: 0 4px 16px var(--primary-glow);
        }
        .process-step h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .process-connector {
            display: none;
        }
        @media (min-width: 900px) {
            .process-steps {
                grid-template-columns: repeat(4, 1fr);
            }
            .process-step:not(:last-child)::after {
                content: '\f054';
                font-family: 'Font Awesome 6 Free';
                font-weight: 900;
                position: absolute;
                right: -18px;
                top: 50%;
                transform: translateY(-50%);
                color: var(--primary);
                font-size: 1rem;
                opacity: 0.5;
            }
        }
        @media (max-width: 899px) {
            .process-steps {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 520px) {
            .process-steps {
                grid-template-columns: 1fr;
            }
        }

        /* ===== Stats / Numbers ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
            gap: 24px;
            text-align: center;
        }
        .stat-item {
            background: rgba(255, 255, 255, 0.02);
            border-radius: var(--radius);
            padding: 32px 16px;
            border: 1px solid rgba(255, 255, 255, 0.04);
            transition: background var(--transition), transform var(--transition);
        }
        .stat-item:hover {
            background: rgba(255, 107, 53, 0.04);
            transform: translateY(-2px);
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 900;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stat-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        @media (max-width: 520px) {
            .stats-grid {
                grid-template-columns: 1fr 1fr;
            }
            .stat-number {
                font-size: 2rem;
            }
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 820px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-item:hover {
            border-color: var(--border-glow);
        }
        .faq-item.open {
            border-color: rgba(255, 107, 53, 0.3);
        }
        .faq-question {
            width: 100%;
            background: none;
            border: none;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            color: var(--text-light);
            font-size: 1.05rem;
            font-weight: 600;
            text-align: left;
            transition: background var(--transition), color var(--transition);
        }
        .faq-question:hover {
            background: rgba(255, 255, 255, 0.02);
        }
        .faq-question:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: -2px;
        }
        .faq-question i {
            color: var(--primary);
            font-size: 0.9rem;
            transition: transform 0.4s ease;
            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(0.23, 1, 0.32, 1), padding 0.4s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 320px;
            padding: 0 24px 22px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, rgba(255, 107, 53, 0.08), rgba(0, 212, 255, 0.04));
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .cta-box {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 64px 48px;
            border: 1px solid var(--border-color);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(255, 107, 53, 0.08), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-box h2 {
            font-size: clamp(1.6rem, 3vw, 2.4rem);
            margin-bottom: 12px;
            position: relative;
        }
        .cta-box p {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 560px;
            margin: 0 auto 32px;
            position: relative;
        }
        .cta-box .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 18px 48px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1.1rem;
            display: inline-flex;
            align-items: center;
            gap: 12px;
            border: none;
            cursor: pointer;
            transition: transform var(--transition), box-shadow var(--transition);
            box-shadow: 0 6px 28px var(--primary-glow);
            text-decoration: none;
            position: relative;
        }
        .cta-box .btn-primary:hover {
            transform: translateY(-3px) scale(1.02);
            box-shadow: 0 12px 44px var(--primary-glow);
            color: #fff;
        }

        @media (max-width: 640px) {
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box .btn-primary {
                width: 100%;
                justify-content: center;
            }
        }

        /* ===== Footer (shared) ===== */
        .site-footer {
            background: var(--secondary);
            padding: 64px 0 32px;
            border-top: 1px solid var(--border-color);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand h3 {
            font-size: 1.3rem;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-brand h3 i {
            color: var(--primary);
        }
        .footer-brand p {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.8;
            max-width: 340px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 18px;
            color: var(--text-light);
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color var(--transition), gap var(--transition);
        }
        .footer-col ul li a i {
            font-size: 0.65rem;
            color: var(--primary);
            transition: transform var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--text-light);
            gap: 12px;
        }
        .footer-col ul li a:hover i {
            transform: translateX(3px);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 28px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-bottom .social-links {
            display: flex;
            gap: 14px;
        }
        .footer-bottom .social-links a {
            color: var(--text-muted);
            font-size: 1.2rem;
            transition: color var(--transition), transform var(--transition);
        }
        .footer-bottom .social-links a:hover {
            color: var(--primary);
            transform: translateY(-2px);
        }

        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
            .footer-brand p {
                max-width: 100%;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== Misc Utilities ===== */
        .mb-0 {
            margin-bottom: 0 !important;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-32 {
            margin-top: 32px;
        }
        .gap-8 {
            gap: 8px;
        }
        .flex-center {
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* ===== Section Background Variants ===== */
        .section-dark {
            background: rgba(255, 255, 255, 0.01);
        }
        .section-glow {
            background: radial-gradient(ellipse at 50% 0%, rgba(255, 107, 53, 0.04), transparent 70%);
        }

        /* ===== Focus Visible ===== */
        :focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
        }

        /* ===== Smooth Scroll Offset ===== */
        .scroll-offset {
            scroll-margin-top: calc(var(--header-h) + 24px);
        }

        /* Foundation override: remove default card/button style conflicts */
        .button {
            margin-bottom: 0;
        }
        .card {
            background: transparent;
            border: none;
        }

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #00d4ff;
            --color-primary-dark: #009bb5;
            --color-accent: #7b2ff7;
            --color-accent-light: #a066ff;
            --color-bg: #0a0e1a;
            --color-bg-alt: #111827;
            --color-bg-card: rgba(18, 24, 43, 0.85);
            --color-bg-overlay: rgba(10, 14, 26, 0.82);
            --color-text: #f0f4ff;
            --color-text-secondary: #b0b8d1;
            --color-text-muted: #6b7280;
            --color-border: rgba(0, 212, 255, 0.18);
            --color-border-hover: rgba(0, 212, 255, 0.4);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 6px 28px rgba(0, 0, 0, 0.45);
            --shadow-lg: 0 12px 48px rgba(0, 0, 0, 0.6);
            --shadow-glow: 0 0 24px rgba(0, 212, 255, 0.15);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
            --content-width: 780px;
        }

        /* ===== 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(--color-bg);
            color: var(--color-text);
            line-height: 1.7;
            font-size: 16px;
            overflow-x: hidden;
        }
        a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
        a:hover, a:focus { color: var(--color-primary-dark); }
        a:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 4px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--color-text); }
        h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); }
        h2 { font-size: clamp(1.5rem, 3vw, 2.4rem); }
        h3 { font-size: clamp(1.15rem, 2vw, 1.6rem); }
        h4 { font-size: 1.1rem; }
        p { margin-bottom: 1.2rem; color: var(--color-text-secondary); }
        .container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }
        .content-container { max-width: var(--content-width); margin: 0 auto; padding: 0 24px; }
        .section-padding { padding: 80px 0; }
        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title h2 { margin-bottom: 12px; }
        .section-title p { font-size: 1.1rem; max-width: 600px; margin: 0 auto; color: var(--color-text-secondary); }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 14, 26, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--color-border);
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled { box-shadow: var(--shadow-md); }
        .nav-inner {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--color-text);
            letter-spacing: -0.5px;
            transition: opacity var(--transition);
        }
        .nav-logo i { color: var(--color-primary); font-size: 1.5rem; }
        .nav-logo:hover { opacity: 0.85; color: var(--color-text); }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--color-text-secondary);
            transition: all var(--transition);
            position: relative;
        }
        .nav-links a:hover,
        .nav-links a:focus-visible {
            color: var(--color-text);
            background: rgba(255,255,255,0.06);
        }
        .nav-links a.active {
            color: var(--color-primary);
            background: rgba(0, 212, 255, 0.1);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 20%;
            right: 20%;
            height: 2px;
            background: var(--color-primary);
            border-radius: 2px;
        }
        .nav-cta { margin-left: 12px; }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.95rem;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff !important;
            border: none;
            cursor: pointer;
            transition: all var(--transition);
            box-shadow: 0 4px 20px rgba(0, 212, 255, 0.3);
            text-decoration: none !important;
        }
        .btn-primary:hover {
            transform: translateY(-2px) scale(1.02);
            box-shadow: 0 8px 32px rgba(0, 212, 255, 0.45);
            color: #fff !important;
        }
        .btn-primary:active { transform: translateY(0) scale(0.98); }
        .btn-primary i { font-size: 0.85rem; }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            background: transparent;
            color: var(--color-primary) !important;
            border: 1.5px solid var(--color-primary);
            cursor: pointer;
            transition: all var(--transition);
            text-decoration: none !important;
        }
        .btn-secondary:hover {
            background: rgba(0, 212, 255, 0.08);
            transform: translateY(-2px);
            color: var(--color-primary) !important;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--color-text);
            font-size: 1.6rem;
            cursor: pointer;
            padding: 4px 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .nav-toggle:hover { background: rgba(255,255,255,0.06); }

        /* ===== 文章 Hero ===== */
        .article-hero {
            position: relative;
            min-height: 380px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 120px 24px 60px;
            background: var(--color-bg-alt);
            overflow: hidden;
        }
        .article-hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            filter: brightness(0.35) saturate(0.6);
            z-index: 0;
        }
        .article-hero .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(to bottom, rgba(10,14,26,0.6) 0%, rgba(10,14,26,0.9) 100%);
            z-index: 1;
        }
        .article-hero-content {
            position: relative;
            z-index: 2;
            max-width: var(--content-width);
        }
        .article-hero-content .category-badge {
            display: inline-block;
            padding: 6px 20px;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            text-transform: uppercase;
            margin-bottom: 20px;
            box-shadow: 0 4px 16px rgba(0,212,255,0.25);
        }
        .article-hero-content h1 {
            font-size: clamp(1.8rem, 4vw, 3rem);
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            background: linear-gradient(to right, #fff, var(--color-primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .article-hero-content .meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 24px;
            flex-wrap: wrap;
            color: var(--color-text-secondary);
            font-size: 0.95rem;
        }
        .article-hero-content .meta i { margin-right: 6px; color: var(--color-primary); }

        /* ===== 文章正文 ===== */
        .article-body-wrap {
            padding: 60px 0 40px;
            background: var(--color-bg);
        }
        .article-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--color-text-secondary);
        }
        .article-body p { margin-bottom: 1.4rem; }
        .article-body h2, .article-body h3 { margin-top: 2rem; margin-bottom: 1rem; color: var(--color-text); }
        .article-body ul, .article-body ol {
            margin-bottom: 1.4rem;
            padding-left: 1.8rem;
            list-style: disc;
            color: var(--color-text-secondary);
        }
        .article-body ol { list-style: decimal; }
        .article-body li { margin-bottom: 0.5rem; }
        .article-body blockquote {
            border-left: 4px solid var(--color-primary);
            padding: 16px 24px;
            margin: 1.8rem 0;
            background: rgba(0, 212, 255, 0.05);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--color-text);
        }
        .article-body img { border-radius: var(--radius-md); margin: 1.8rem 0; }
        .article-body a { color: var(--color-primary); text-decoration: underline; text-underline-offset: 2px; }
        .article-body a:hover { color: var(--color-accent-light); }
        .article-not-found {
            text-align: center;
            padding: 80px 24px;
        }
        .article-not-found i { font-size: 3rem; color: var(--color-text-muted); margin-bottom: 20px; }
        .article-not-found h2 { margin-bottom: 12px; }
        .article-not-found p { color: var(--color-text-secondary); margin-bottom: 20px; }
        .article-not-found a { color: var(--color-primary); font-weight: 600; }

        /* ===== 相关推荐 ===== */
        .related-section {
            background: var(--color-bg-alt);
            padding: 70px 0;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 28px;
        }
        .related-card {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
            backdrop-filter: blur(8px);
        }
        .related-card:hover {
            transform: translateY(-6px);
            border-color: var(--color-border-hover);
            box-shadow: var(--shadow-md), var(--shadow-glow);
        }
        .related-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card-body {
            padding: 20px 22px 24px;
        }
        .related-card-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--color-text);
        }
        .related-card-body p {
            font-size: 0.92rem;
            color: var(--color-text-secondary);
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card-body .read-more {
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--color-primary);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition);
        }
        .related-card-body .read-more:hover { gap: 10px; color: var(--color-accent-light); }

        /* ===== FAQ ===== */
        .faq-section {
            background: var(--color-bg);
            padding: 70px 0;
        }
        .faq-list {
            max-width: var(--content-width);
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-bg-card);
            border: 1px solid var(--color-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: border-color var(--transition);
            backdrop-filter: blur(8px);
        }
        .faq-item:hover { border-color: var(--color-border-hover); }
        .faq-question {
            width: 100%;
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            background: none;
            border: none;
            color: var(--color-text);
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            text-align: left;
            transition: background var(--transition);
            font-family: inherit;
        }
        .faq-question:hover { background: rgba(255,255,255,0.03); }
        .faq-question:focus-visible { outline: 2px solid var(--color-primary); outline-offset: -2px; }
        .faq-question i { color: var(--color-primary); transition: transform var(--transition); font-size: 0.85rem; }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0 24px;
            color: var(--color-text-secondary);
            font-size: 0.96rem;
            line-height: 1.7;
        }
        .faq-item.active .faq-answer {
            max-height: 400px;
            padding: 0 24px 20px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-bg-alt);
            padding: 80px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(ellipse at center, rgba(0,212,255,0.06) 0%, transparent 60%);
            pointer-events: none;
        }
        .cta-section h2 { margin-bottom: 16px; }
        .cta-section p { max-width: 560px; margin: 0 auto 32px; color: var(--color-text-secondary); }
        .cta-buttons { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #070b14;
            border-top: 1px solid var(--color-border);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .footer-brand h3 { font-size: 1.3rem; margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
        .footer-brand h3 i { color: var(--color-primary); }
        .footer-brand p { font-size: 0.9rem; color: var(--color-text-muted); line-height: 1.7; max-width: 360px; }
        .footer-col h4 { font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; color: var(--color-text); }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: var(--color-text-muted); font-size: 0.88rem; display: flex; align-items: center; gap: 8px; transition: all var(--transition); }
        .footer-col ul li a i { font-size: 0.6rem; color: var(--color-primary); }
        .footer-col ul li a:hover { color: var(--color-primary); padding-left: 4px; }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-bottom span { font-size: 0.85rem; color: var(--color-text-muted); }
        .social-links { display: flex; gap: 12px; }
        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255,255,255,0.06);
            color: var(--color-text-secondary);
            font-size: 1.2rem;
            transition: all var(--transition);
        }
        .social-links a:hover { background: var(--color-primary); color: #fff; transform: translateY(-2px); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .footer-brand { grid-column: 1 / -1; }
        }
        @media (max-width: 768px) {
            .nav-links a:not(.nav-cta a) { display: none; }
            .nav-links .nav-cta { margin-left: 0; }
            .nav-toggle { display: block; }
            .nav-links.open {
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(10, 14, 26, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: 20px 24px;
                border-bottom: 1px solid var(--color-border);
                gap: 6px;
            }
            .nav-links.open a { display: flex; }
            .nav-links.open .nav-cta { margin-top: 8px; }
            .article-hero { min-height: 300px; padding: 100px 20px 40px; }
            .article-hero-content .meta { gap: 14px; font-size: 0.85rem; flex-direction: column; }
            .related-grid { grid-template-columns: 1fr 1fr; }
            .section-padding { padding: 50px 0; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .nav-inner { padding: 0 16px; }
            .nav-logo { font-size: 1.1rem; }
            .btn-primary { padding: 8px 20px; font-size: 0.85rem; }
            .article-hero { min-height: 250px; padding: 80px 16px 30px; }
            .article-hero-content h1 { font-size: 1.5rem; }
            .related-grid { grid-template-columns: 1fr; }
            .cta-buttons { flex-direction: column; align-items: center; }
            .section-title p { font-size: 0.95rem; }
            .faq-question { font-size: 0.9rem; padding: 14px 16px; }
        }

        /* ===== 工具类 ===== */
        .text-center { text-align: center; }
        .mt-1 { margin-top: 1rem; }
        .mt-2 { margin-top: 2rem; }
        .mb-1 { margin-bottom: 1rem; }
        .mb-2 { margin-bottom: 2rem; }
        .gap-sm { gap: 12px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }