/* roulang page: index */
/* ========== 设计变量 ========== */
        :root {
            --clr-primary: #d4a843;
            --clr-primary-dark: #b8922e;
            --clr-primary-light: #f0d68a;
            --clr-accent: #e94560;
            --clr-accent-dark: #c9304f;
            --clr-bg: #0d0d1a;
            --clr-bg-alt: #13132a;
            --clr-bg-card: #1a1a35;
            --clr-bg-card-hover: #222244;
            --clr-text: #eaeaea;
            --clr-text-muted: #9a9ab0;
            --clr-text-light: #ffffff;
            --clr-border: rgba(212, 168, 67, 0.2);
            --clr-border-hover: rgba(212, 168, 67, 0.5);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 6px 24px rgba(0,0,0,0.4);
            --shadow-lg: 0 12px 48px rgba(0,0,0,0.5);
            --shadow-glow: 0 0 30px rgba(212, 168, 67, 0.15);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --spacing-xs: 0.25rem;
            --spacing-sm: 0.5rem;
            --spacing-md: 1rem;
            --spacing-lg: 2rem;
            --spacing-xl: 4rem;
            --spacing-2xl: 6rem;
            --max-width: 1200px;
            --header-height: 72px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ========== 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-family);
            font-size: 16px;
            line-height: 1.6;
            color: var(--clr-text);
            background: var(--clr-bg);
            min-height: 100vh;
        }
        a { color: var(--clr-primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--clr-primary-light); }
        a:focus-visible { outline: 2px solid var(--clr-primary); outline-offset: 2px; border-radius: 2px; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea, select { font-family: inherit; font-size: inherit; }
        button { cursor: pointer; border: none; background: none; }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.25; color: var(--clr-text-light); font-weight: 700; }
        h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
        h2 { font-size: clamp(1.5rem, 3.5vw, 2.5rem); }
        h3 { font-size: clamp(1.125rem, 2.5vw, 1.5rem); }
        p { margin-bottom: var(--spacing-md); color: var(--clr-text); }
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 var(--spacing-lg);
        }
        @media (max-width: 768px) {
            .container { padding: 0 var(--spacing-md); }
        }

        /* ========== Utility ========== */
        .section-title {
            text-align: center;
            margin-bottom: var(--spacing-xl);
            position: relative;
        }
        .section-title h2 {
            display: inline-block;
            position: relative;
        }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60%;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--clr-primary), transparent);
            margin: var(--spacing-sm) auto 0;
            border-radius: 2px;
        }
        .section-title p {
            color: var(--clr-text-muted);
            font-size: 1.05rem;
            margin-top: var(--spacing-sm);
        }
        .badge {
            display: inline-block;
            padding: 0.2em 0.8em;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 999px;
            background: rgba(212, 168, 67, 0.15);
            color: var(--clr-primary);
            border: 1px solid rgba(212, 168, 67, 0.25);
            letter-spacing: 0.02em;
            text-transform: uppercase;
        }
        .badge-hot {
            background: rgba(233, 69, 96, 0.2);
            color: var(--clr-accent);
            border-color: rgba(233, 69, 96, 0.3);
        }
        .badge-new {
            background: rgba(0, 200, 150, 0.15);
            color: #00c896;
            border-color: rgba(0, 200, 150, 0.25);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.75rem 2rem;
            font-weight: 600;
            font-size: 0.95rem;
            border-radius: 999px;
            transition: all var(--transition);
            border: 2px solid transparent;
            text-align: center;
            justify-content: center;
        }
        .btn-primary {
            background: var(--clr-primary);
            color: #0d0d1a;
            border-color: var(--clr-primary);
        }
        .btn-primary:hover {
            background: var(--clr-primary-dark);
            border-color: var(--clr-primary-dark);
            color: #0d0d1a;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(212, 168, 67, 0.3);
        }
        .btn-primary:active { transform: translateY(0); }
        .btn-outline {
            background: transparent;
            color: var(--clr-primary);
            border-color: var(--clr-primary);
        }
        .btn-outline:hover {
            background: var(--clr-primary);
            color: #0d0d1a;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(212, 168, 67, 0.2);
        }
        .btn-accent {
            background: var(--clr-accent);
            color: #fff;
            border-color: var(--clr-accent);
        }
        .btn-accent:hover {
            background: var(--clr-accent-dark);
            border-color: var(--clr-accent-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(233, 69, 96, 0.3);
        }
        .btn-sm { padding: 0.5rem 1.25rem; font-size: 0.85rem; }
        .btn-lg { padding: 1rem 2.75rem; font-size: 1.1rem; }

        /* ========== Header & Nav ========== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(13, 13, 26, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--clr-border);
            height: var(--header-height);
            transition: background var(--transition), border-color var(--transition);
        }
        .header.scrolled {
            background: rgba(13, 13, 26, 0.98);
            border-color: rgba(212, 168, 67, 0.15);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--clr-text-light);
            letter-spacing: -0.02em;
        }
        .logo i {
            color: var(--clr-primary);
            font-size: 1.6rem;
        }
        .logo span { background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { color: var(--clr-text-light); }
        .nav { display: flex; align-items: center; gap: var(--spacing-lg); }
        .nav a {
            color: var(--clr-text-muted);
            font-weight: 500;
            font-size: 0.9rem;
            position: relative;
            padding: 0.25rem 0;
            transition: color var(--transition);
        }
        .nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--clr-primary);
            border-radius: 2px;
            transition: width var(--transition);
        }
        .nav a:hover { color: var(--clr-text-light); }
        .nav a:hover::after { width: 100%; }
        .nav a.active { color: var(--clr-primary); }
        .nav a.active::after { width: 100%; }
        .nav-cta {
            margin-left: var(--spacing-sm);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 4px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--clr-text-light);
            border-radius: 2px;
            transition: all var(--transition);
        }
        .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
        .nav-toggle.active span:nth-child(2) { opacity: 0; }
        .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

        @media (max-width: 768px) {
            .nav-toggle { display: flex; }
            .nav {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(13, 13, 26, 0.98);
                backdrop-filter: blur(16px);
                flex-direction: column;
                padding: var(--spacing-lg) var(--spacing-md);
                gap: var(--spacing-md);
                border-bottom: 1px solid var(--clr-border);
                transform: translateY(-120%);
                opacity: 0;
                transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
                pointer-events: none;
            }
            .nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav a { font-size: 1rem; padding: 0.5rem 0; }
            .nav-cta { margin-left: 0; width: 100%; }
            .nav-cta .btn { width: 100%; }
        }

        /* ========== Hero ========== */
        .hero {
            min-height: 90vh;
            display: flex;
            align-items: center;
            position: relative;
            overflow: hidden;
            padding-top: var(--header-height);
            background: var(--clr-bg);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            opacity: 0.35;
            z-index: 0;
            animation: heroZoom 20s ease-in-out infinite alternate;
        }
        @keyframes heroZoom {
            0% { transform: scale(1); }
            100% { transform: scale(1.05); }
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 30% 50%, rgba(13,13,26,0.4) 0%, rgba(13,13,26,0.9) 70%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
            padding-top: var(--spacing-xl);
            padding-bottom: var(--spacing-xl);
        }
        .hero-content { max-width: 640px; }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.4rem 1.2rem;
            background: rgba(212, 168, 67, 0.1);
            border: 1px solid rgba(212, 168, 67, 0.2);
            border-radius: 999px;
            font-size: 0.8rem;
            color: var(--clr-primary);
            margin-bottom: var(--spacing-lg);
        }
        .hero-badge i { font-size: 0.7rem; }
        .hero h1 {
            font-size: clamp(2.2rem, 5.5vw, 3.8rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: var(--spacing-md);
            background: linear-gradient(135deg, #ffffff 30%, var(--clr-primary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero p {
            font-size: 1.15rem;
            color: var(--clr-text-muted);
            max-width: 540px;
            margin-bottom: var(--spacing-lg);
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-md);
            align-items: center;
        }
        .hero-stats {
            display: flex;
            gap: var(--spacing-xl);
            margin-top: var(--spacing-lg);
            padding-top: var(--spacing-lg);
            border-top: 1px solid var(--clr-border);
        }
        .hero-stat-item { text-align: center; }
        .hero-stat-item .num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--clr-primary);
            line-height: 1.2;
        }
        .hero-stat-item .label {
            font-size: 0.8rem;
            color: var(--clr-text-muted);
            margin-top: 0.2rem;
        }
        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
            position: relative;
        }
        .hero-visual img {
            max-width: 100%;
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--clr-border);
        }
        .hero-float-badge {
            position: absolute;
            bottom: -10px;
            left: -10px;
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            padding: var(--spacing-sm) var(--spacing-md);
            display: flex;
            align-items: center;
            gap: 0.5rem;
            box-shadow: var(--shadow-md);
            backdrop-filter: blur(8px);
        }
        .hero-float-badge i { color: var(--clr-primary); }
        .hero-float-badge span { font-size: 0.85rem; color: var(--clr-text-light); font-weight: 600; }

        @media (max-width: 1024px) {
            .hero .container { grid-template-columns: 1fr; text-align: center; }
            .hero-content { max-width: 100%; }
            .hero p { margin-left: auto; margin-right: auto; }
            .hero-actions { justify-content: center; }
            .hero-stats { justify-content: center; }
            .hero-visual { display: none; }
        }
        @media (max-width: 520px) {
            .hero { min-height: 80vh; }
            .hero-actions { flex-direction: column; width: 100%; }
            .hero-actions .btn { width: 100%; }
            .hero-stats { flex-wrap: wrap; gap: var(--spacing-md); }
        }

        /* ========== Section Spacing ========== */
        .section { padding: var(--spacing-2xl) 0; }
        .section-alt { background: var(--clr-bg-alt); }
        @media (max-width: 768px) { .section { padding: var(--spacing-xl) 0; } }

        /* ========== Intro / 平台介绍 ========== */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-xl);
            align-items: center;
        }
        .intro-image img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            border: 1px solid var(--clr-border);
            width: 100%;
        }
        .intro-text h3 { margin-bottom: var(--spacing-md); }
        .intro-text p { color: var(--clr-text-muted); }
        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-md);
            margin-top: var(--spacing-lg);
        }
        .intro-feat {
            display: flex;
            align-items: flex-start;
            gap: var(--spacing-sm);
            padding: var(--spacing-sm);
            border-radius: var(--radius-sm);
            background: rgba(212, 168, 67, 0.05);
            border: 1px solid transparent;
            transition: all var(--transition);
        }
        .intro-feat:hover { background: rgba(212, 168, 67, 0.1); border-color: var(--clr-border); }
        .intro-feat i { color: var(--clr-primary); font-size: 1.1rem; margin-top: 2px; flex-shrink: 0; }
        .intro-feat span { font-size: 0.9rem; color: var(--clr-text); font-weight: 500; }

        @media (max-width: 768px) {
            .intro-grid { grid-template-columns: 1fr; }
            .intro-features { grid-template-columns: 1fr; }
            .intro-image { display: none; }
        }

        /* ========== 数据统计 ========== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
        }
        .stat-card {
            background: var(--clr-bg-card);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            text-align: center;
            border: 1px solid var(--clr-border);
            transition: all var(--transition);
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
            border-color: var(--clr-border-hover);
        }
        .stat-card .icon {
            font-size: 2rem;
            color: var(--clr-primary);
            margin-bottom: var(--spacing-sm);
        }
        .stat-card .num {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--clr-text-light);
            line-height: 1.2;
        }
        .stat-card .label {
            font-size: 0.85rem;
            color: var(--clr-text-muted);
            margin-top: 0.25rem;
        }

        @media (max-width: 768px) { .stats-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (max-width: 520px) { .stats-grid { grid-template-columns: 1fr; } }

        /* ========== 分类入口 ========== */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: var(--spacing-lg);
        }
        .category-card {
            background: var(--clr-bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--clr-border);
            transition: all var(--transition);
            cursor: pointer;
            position: relative;
        }
        .category-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-glow);
            border-color: var(--clr-border-hover);
        }
        .category-card img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .category-card:hover img { transform: scale(1.05); }
        .category-card .body {
            padding: var(--spacing-lg);
        }
        .category-card .body h3 {
            margin-bottom: var(--spacing-xs);
            font-size: 1.15rem;
        }
        .category-card .body p {
            color: var(--clr-text-muted);
            font-size: 0.9rem;
            margin-bottom: 0;
        }
        .category-card .body .badge {
            margin-bottom: var(--spacing-sm);
        }
        .category-card .overlay-link {
            position: absolute;
            inset: 0;
            z-index: 2;
        }

        @media (max-width: 768px) { .category-grid { grid-template-columns: 1fr 1fr; } }
        @media (max-width: 520px) { .category-grid { grid-template-columns: 1fr; } }

        /* ========== 最新资讯 / CMS列表 ========== */
        .post-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: var(--spacing-lg);
        }
        .post-card {
            background: var(--clr-bg-card);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            border: 1px solid var(--clr-border);
            transition: all var(--transition);
            display: flex;
            flex-direction: column;
            position: relative;
        }
        .post-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
            border-color: var(--clr-border-hover);
        }
        .post-card .meta {
            display: flex;
            align-items: center;
            gap: var(--spacing-md);
            font-size: 0.8rem;
            color: var(--clr-text-muted);
            margin-bottom: var(--spacing-sm);
        }
        .post-card .meta .cat {
            color: var(--clr-primary);
            font-weight: 600;
        }
        .post-card .meta .date i { margin-right: 4px; }
        .post-card h3 {
            font-size: 1.1rem;
            margin-bottom: var(--spacing-sm);
            line-height: 1.4;
        }
        .post-card h3 a {
            color: var(--clr-text-light);
            transition: color var(--transition);
        }
        .post-card h3 a:hover { color: var(--clr-primary); }
        .post-card p {
            color: var(--clr-text-muted);
            font-size: 0.9rem;
            margin-bottom: var(--spacing-md);
            flex: 1;
        }
        .post-card .read-more {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--clr-primary);
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            transition: gap var(--transition);
        }
        .post-card .read-more:hover { gap: 0.6rem; }
        .post-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: var(--spacing-xl);
            color: var(--clr-text-muted);
            background: var(--clr-bg-card);
            border-radius: var(--radius-md);
            border: 1px dashed var(--clr-border);
        }

        @media (max-width: 768px) { .post-grid { grid-template-columns: 1fr; } }

        /* ========== 流程指南 ========== */
        .flow-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: var(--spacing-lg);
            counter-reset: step;
        }
        .flow-card {
            background: var(--clr-bg-card);
            border-radius: var(--radius-md);
            padding: var(--spacing-lg);
            text-align: center;
            border: 1px solid var(--clr-border);
            position: relative;
            transition: all var(--transition);
        }
        .flow-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
            border-color: var(--clr-border-hover);
        }
        .flow-card .step-num {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--clr-primary), var(--clr-primary-dark));
            color: #0d0d1a;
            font-weight: 800;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto var(--spacing-md);
        }
        .flow-card h4 { margin-bottom: var(--spacing-xs); font-size: 1.05rem; }
        .flow-card p { color: var(--clr-text-muted); font-size: 0.85rem; margin-bottom: 0; }
        .flow-connector {
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--clr-primary);
            font-size: 1.2rem;
            opacity: 0.5;
        }

        @media (max-width: 768px) {
            .flow-grid { grid-template-columns: 1fr 1fr; }
            .flow-connector { display: none; }
        }
        @media (max-width: 520px) { .flow-grid { grid-template-columns: 1fr; } }

        /* ========== FAQ ========== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: var(--spacing-sm);
        }
        .faq-item {
            background: var(--clr-bg-card);
            border: 1px solid var(--clr-border);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition);
        }
        .faq-item:hover { border-color: var(--clr-border-hover); }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: var(--spacing-lg);
            cursor: pointer;
            font-weight: 600;
            color: var(--clr-text-light);
            font-size: 1rem;
            background: none;
            width: 100%;
            text-align: left;
            border: none;
            transition: color var(--transition);
        }
        .faq-question i {
            color: var(--clr-primary);
            transition: transform var(--transition);
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .faq-question.open i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 var(--spacing-lg) var(--spacing-lg);
            color: var(--clr-text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open { display: block; }

        /* ========== CTA ========== */
        .cta-section {
            background: var(--clr-bg-alt);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.1;
            z-index: 0;
        }
        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-content h2 { margin-bottom: var(--spacing-md); }
        .cta-content p { color: var(--clr-text-muted); font-size: 1.05rem; margin-bottom: var(--spacing-lg); }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-md);
            justify-content: center;
        }

        /* ========== Footer ========== */
        .footer {
            background: var(--clr-bg);
            border-top: 1px solid var(--clr-border);
            padding: var(--spacing-xl) 0 var(--spacing-lg);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: var(--spacing-xl);
            margin-bottom: var(--spacing-xl);
        }
        .footer-brand .logo { font-size: 1.3rem; margin-bottom: var(--spacing-sm); }
        .footer-brand p {
            color: var(--clr-text-muted);
            font-size: 0.9rem;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--clr-text-light);
            margin-bottom: var(--spacing-md);
            text-transform: uppercase;
            letter-spacing: 0.05em;
        }
        .footer-col a {
            display: block;
            color: var(--clr-text-muted);
            font-size: 0.85rem;
            padding: 0.3rem 0;
            transition: color var(--transition);
        }
        .footer-col a:hover { color: var(--clr-primary); }
        .footer-bottom {
            border-top: 1px solid var(--clr-border);
            padding-top: var(--spacing-lg);
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: var(--spacing-md);
            font-size: 0.8rem;
            color: var(--clr-text-muted);
        }
        .footer-bottom a { color: var(--clr-text-muted); }
        .footer-bottom a:hover { color: var(--clr-primary); }

        @media (max-width: 768px) {
            .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-lg); }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* ========== Scrollbar ========== */
        ::-webkit-scrollbar { width: 6px; }
        ::-webkit-scrollbar-track { background: var(--clr-bg); }
        ::-webkit-scrollbar-thumb { background: var(--clr-border); border-radius: 3px; }
        ::-webkit-scrollbar-thumb:hover { background: var(--clr-primary); }

        /* ========== Selection ========== */
        ::selection { background: rgba(212, 168, 67, 0.3); color: #fff; }

        /* ========== Animations ========== */
        @keyframes fadeInUp {
            from { opacity: 0; transform: translateY(30px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .animate-in {
            animation: fadeInUp 0.6s ease forwards;
        }
        .animate-delay-1 { animation-delay: 0.1s; }
        .animate-delay-2 { animation-delay: 0.2s; }
        .animate-delay-3 { animation-delay: 0.3s; }
        .animate-delay-4 { animation-delay: 0.4s; }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #d4a843;
            --primary-dark: #b8922e;
            --primary-light: #e8c86a;
            --primary-bg: rgba(212, 168, 67, 0.08);
            --secondary: #1a1a2e;
            --secondary-light: #2a2a4a;
            --accent: #e74c3c;
            --accent-light: #ff6b6b;
            --bg-dark: #0d0d1a;
            --bg-card: #1a1a2e;
            --bg-card-hover: #222240;
            --bg-body: #0d0d1a;
            --text-primary: #f0e6d3;
            --text-secondary: #b8a9a0;
            --text-muted: #7a6e6a;
            --border-color: rgba(212, 168, 67, 0.15);
            --border-light: rgba(255, 255, 255, 0.06);
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.2);
            --shadow-glow: 0 0 30px rgba(212, 168, 67, 0.1);
            --font-main: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 2rem;
            --spacing-lg: 4rem;
            --spacing-xl: 6rem;
            --max-width: 1200px;
        }

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

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

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

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-sm);
        }

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

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

        ul,
        ol {
            list-style: none;
        }

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

        /* ===== Header / Nav (品牌活动导航) ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(13, 13, 26, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.5px;
        }
        .logo i {
            color: var(--primary);
            font-size: 1.6rem;
        }
        .logo span {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .logo:hover {
            opacity: 0.9;
        }

        .nav {
            display: flex;
            align-items: center;
            gap: 2rem;
        }

        .nav a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 0.4rem 0;
            position: relative;
            transition: var(--transition);
        }
        .nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav a:hover {
            color: var(--text-primary);
        }
        .nav a:hover::after {
            width: 100%;
        }
        .nav a.active {
            color: var(--primary);
        }
        .nav a.active::after {
            width: 100%;
            background: var(--primary);
        }

        .nav-cta {
            margin-left: 0.5rem;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.95rem;
            cursor: pointer;
            transition: var(--transition);
            border: none;
            text-align: center;
            line-height: 1.2;
        }
        .btn i {
            font-size: 0.9em;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #0d0d1a;
            box-shadow: 0 4px 20px rgba(212, 168, 67, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(212, 168, 67, 0.4);
            color: #0d0d1a;
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
        }
        .btn-outline {
            border: 1.5px solid var(--primary);
            color: var(--primary);
            background: transparent;
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #0d0d1a;
            transform: translateY(-2px);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 4px;
            background: transparent;
            border: none;
        }
        .nav-toggle span {
            display: block;
            width: 26px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-toggle:hover span {
            background: var(--primary);
        }

        /* ===== Article Banner ===== */
        .article-banner {
            padding-top: 120px;
            padding-bottom: 3rem;
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-card) 50%, var(--bg-dark) 100%);
            border-bottom: 1px solid var(--border-color);
            position: relative;
            overflow: hidden;
        }
        .article-banner::before {
            content: '';
            position: absolute;
            top: -30%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(212, 168, 67, 0.06), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .article-banner .container {
            position: relative;
            z-index: 1;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem 2rem;
            margin-bottom: 1.5rem;
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .article-meta .category {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 16px;
            border-radius: 20px;
            background: var(--primary-bg);
            color: var(--primary);
            font-weight: 600;
            font-size: 0.8rem;
            border: 1px solid rgba(212, 168, 67, 0.2);
        }
        .article-meta .date {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta .date i {
            color: var(--primary);
        }

        .article-title {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-primary);
            letter-spacing: -0.5px;
            max-width: 900px;
        }
        .article-title .highlight {
            color: var(--primary);
        }

        .article-excerpt {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 800px;
            margin-top: 1.2rem;
            padding-left: 1rem;
            border-left: 3px solid var(--primary);
        }

        /* ===== Article Main ===== */
        .article-main {
            padding: var(--spacing-lg) 0;
        }
        .article-main .container {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: var(--spacing-lg);
            align-items: start;
        }

        .article-content {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: var(--spacing-md);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            min-height: 300px;
        }

        .article-content .content-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text-primary);
        }
        .article-content .content-body p {
            margin-bottom: 1.2rem;
        }
        .article-content .content-body h2,
        .article-content .content-body h3 {
            color: var(--primary);
            margin-top: 2rem;
            margin-bottom: 1rem;
            font-weight: 700;
        }
        .article-content .content-body h2 {
            font-size: 1.6rem;
        }
        .article-content .content-body h3 {
            font-size: 1.25rem;
        }
        .article-content .content-body ul,
        .article-content .content-body ol {
            margin-bottom: 1.2rem;
            padding-left: 1.5rem;
        }
        .article-content .content-body ul li {
            list-style: disc;
            margin-bottom: 0.4rem;
        }
        .article-content .content-body ol li {
            list-style: decimal;
            margin-bottom: 0.4rem;
        }
        .article-content .content-body a {
            color: var(--primary);
            text-decoration: underline;
        }
        .article-content .content-body a:hover {
            color: var(--primary-light);
        }
        .article-content .content-body img {
            border-radius: var(--radius-sm);
            margin: 1.5rem 0;
            box-shadow: var(--shadow-sm);
        }
        .article-content .content-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 1rem 1.5rem;
            margin: 1.5rem 0;
            background: var(--primary-bg);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-content .content-body code {
            background: rgba(212, 168, 67, 0.1);
            padding: 2px 8px;
            border-radius: 4px;
            font-family: var(--font-mono);
            font-size: 0.9em;
            color: var(--primary-light);
        }
        .article-content .content-body pre {
            background: var(--bg-dark);
            padding: 1.2rem 1.5rem;
            border-radius: var(--radius-sm);
            overflow-x: auto;
            margin: 1.5rem 0;
            border: 1px solid var(--border-light);
        }
        .article-content .content-body pre code {
            background: none;
            padding: 0;
            color: var(--text-primary);
        }

        .article-notfound {
            text-align: center;
            padding: 4rem 2rem;
        }
        .article-notfound i {
            font-size: 4rem;
            color: var(--primary);
            opacity: 0.5;
            margin-bottom: 1.5rem;
        }
        .article-notfound h2 {
            font-size: 1.8rem;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }
        .article-notfound p {
            color: var(--text-secondary);
            margin-bottom: 2rem;
        }

        /* ===== Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: var(--spacing-md);
        }

        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 1.5rem;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 1rem;
            padding-bottom: 0.6rem;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .sidebar-card h3 i {
            color: var(--primary);
        }

        .sidebar-list {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .sidebar-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 0.6rem 0.8rem;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .sidebar-list a:hover {
            background: var(--primary-bg);
            color: var(--text-primary);
            border-color: var(--border-color);
        }
        .sidebar-list a i {
            color: var(--primary);
            font-size: 0.8rem;
            width: 20px;
            text-align: center;
        }

        .sidebar-cta {
            text-align: center;
        }
        .sidebar-cta p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-bottom: 1rem;
        }
        .sidebar-cta .btn {
            width: 100%;
            justify-content: center;
        }

        /* ===== Tags ===== */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-color);
        }
        .article-tags .tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 16px;
            border-radius: 20px;
            background: var(--primary-bg);
            color: var(--primary);
            font-size: 0.8rem;
            font-weight: 500;
            border: 1px solid rgba(212, 168, 67, 0.15);
            transition: var(--transition);
        }
        .article-tags .tag:hover {
            background: var(--primary);
            color: #0d0d1a;
            transform: translateY(-1px);
        }
        .article-tags .tag i {
            font-size: 0.7rem;
        }

        /* ===== Related Articles ===== */
        .related-section {
            padding: var(--spacing-lg) 0;
            background: var(--bg-dark);
            border-top: 1px solid var(--border-color);
        }
        .related-section .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 2rem;
            text-align: center;
        }
        .related-section .section-title i {
            color: var(--primary);
            margin-right: 10px;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }
        .related-card:hover {
            transform: translateY(-4px);
            border-color: var(--primary);
            box-shadow: var(--shadow);
        }
        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            border-radius: 0;
        }
        .related-card .card-body {
            padding: 1.2rem 1.2rem 1.5rem;
        }
        .related-card .card-body .card-cat {
            font-size: 0.75rem;
            color: var(--primary);
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 0.4rem;
        }
        .related-card .card-body h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            line-height: 1.5;
            margin-bottom: 0.4rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card .card-body h4 a {
            color: var(--text-primary);
        }
        .related-card .card-body h4 a:hover {
            color: var(--primary);
        }
        .related-card .card-body .card-date {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: var(--spacing-lg) 0;
            background: var(--bg-card);
            border-top: 1px solid var(--border-color);
        }
        .faq-section .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 2rem;
            text-align: center;
        }
        .faq-section .section-title i {
            color: var(--primary);
            margin-right: 10px;
        }

        .faq-grid {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }

        .faq-item {
            background: var(--bg-dark);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(212, 168, 67, 0.2);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.2rem 1.5rem;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            cursor: pointer;
            text-align: left;
            transition: var(--transition);
            gap: 1rem;
        }
        .faq-question i {
            color: var(--primary);
            transition: var(--transition);
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question.active i {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 1.5rem 1.2rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-answer.open {
            display: block;
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: var(--spacing-lg) 0;
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-card) 100%);
            border-top: 1px solid var(--border-color);
            text-align: center;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.8rem;
        }
        .cta-section h2 i {
            color: var(--primary);
        }
        .cta-section p {
            color: var(--text-secondary);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 2rem;
        }
        .cta-section .btn {
            padding: 14px 40px;
            font-size: 1.05rem;
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-color);
            padding: var(--spacing-lg) 0 var(--spacing-md);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: var(--spacing-md);
            margin-bottom: var(--spacing-md);
        }
        .footer-brand .logo {
            font-size: 1.3rem;
            margin-bottom: 0.8rem;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 300px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }
        .footer-col a {
            display: block;
            color: var(--text-muted);
            font-size: 0.9rem;
            padding: 0.3rem 0;
            transition: var(--transition);
        }
        .footer-col a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: var(--spacing-md);
            border-top: 1px solid var(--border-color);
            font-size: 0.85rem;
            color: var(--text-muted);
            flex-wrap: wrap;
            gap: 1rem;
        }
        .footer-bottom a {
            color: var(--text-muted);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-main .container {
                grid-template-columns: 1fr;
            }
            .article-sidebar {
                display: grid;
                grid-template-columns: 1fr 1fr;
            }
            .related-grid {
                grid-template-columns: 1fr 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 2rem;
            }
        }

        @media (max-width: 768px) {
            .nav {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                right: 0;
                background: rgba(13, 13, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 1.5rem 2rem 2rem;
                gap: 1rem;
                border-bottom: 1px solid var(--border-color);
                box-shadow: var(--shadow);
            }
            .nav.open {
                display: flex;
            }
            .nav-cta {
                margin-left: 0;
                width: 100%;
            }
            .nav-cta .btn {
                width: 100%;
                justify-content: center;
            }
            .nav-toggle {
                display: flex;
            }

            .article-title {
                font-size: 1.8rem;
            }
            .article-excerpt {
                font-size: 1rem;
            }
            .article-content {
                padding: 1.2rem;
            }

            .article-sidebar {
                grid-template-columns: 1fr;
            }

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 1.5rem;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }

            .cta-section h2 {
                font-size: 1.5rem;
            }
            .faq-section .section-title {
                font-size: 1.4rem;
            }
            .related-section .section-title {
                font-size: 1.4rem;
            }
        }

        @media (max-width: 520px) {
            .header .container {
                height: 64px;
            }
            .logo {
                font-size: 1.2rem;
            }
            .logo i {
                font-size: 1.2rem;
            }
            .article-banner {
                padding-top: 90px;
                padding-bottom: 2rem;
            }
            .article-title {
                font-size: 1.4rem;
            }
            .article-meta {
                gap: 0.6rem 1rem;
                font-size: 0.8rem;
            }
            .article-main {
                padding: var(--spacing-md) 0;
            }
            .article-content {
                padding: 1rem;
            }
            .article-content .content-body {
                font-size: 0.95rem;
            }
            .btn {
                padding: 10px 20px;
                font-size: 0.85rem;
            }
            .btn-sm {
                padding: 6px 16px;
                font-size: 0.8rem;
            }
            .cta-section .btn {
                padding: 12px 28px;
                font-size: 0.95rem;
            }
            .faq-question {
                padding: 1rem 1.2rem;
                font-size: 0.9rem;
            }
            .faq-answer {
                padding: 0 1.2rem 1rem;
                font-size: 0.85rem;
            }
            .sidebar-card {
                padding: 1.2rem;
            }
        }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #f5a623;
            --primary-dark: #d4891a;
            --primary-light: #fce4a8;
            --secondary: #7c3aed;
            --secondary-light: #a78bfa;
            --accent: #ef4444;
            --bg-body: #0f0f1a;
            --bg-card: #1a1a2e;
            --bg-card-hover: #222240;
            --bg-section-alt: #16162a;
            --bg-dark: #0a0a14;
            --text-primary: #f1f1f6;
            --text-secondary: #b0b0c8;
            --text-muted: #7a7a9a;
            --border-color: #2a2a4a;
            --border-light: #3a3a5a;
            --radius: 14px;
            --radius-sm: 8px;
            --radius-lg: 20px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.4);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.5);
            --shadow-glow: 0 0 30px rgba(245,166,35,0.15);
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

        /* ===== Reset / Base ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            background: var(--bg-body);
            color: var(--text-primary);
            line-height: 1.7;
            font-size: 16px;
        }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-light); }
        button, input, textarea { font-family: inherit; font-size: inherit; }
        ul { list-style: none; }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* ===== Typography ===== */
        h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; color: var(--text-primary); }
        h1 { font-size: 2.8rem; letter-spacing: -0.02em; }
        h2 { font-size: 2rem; letter-spacing: -0.01em; }
        h3 { font-size: 1.4rem; }
        h4 { font-size: 1.15rem; }
        p { color: var(--text-secondary); margin-bottom: 1rem; }
        .section-label {
            display: inline-block;
            background: rgba(245,166,35,0.12);
            color: var(--primary);
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-title { margin-bottom: 12px; }
        .section-desc { max-width: 640px; margin-bottom: 40px; font-size: 1.05rem; }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            border: none;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #0f0f1a;
            box-shadow: 0 4px 16px rgba(245,166,35,0.3);
        }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(245,166,35,0.4); color: #0f0f1a; }
        .btn-secondary {
            background: transparent;
            color: var(--text-primary);
            border: 1.5px solid var(--border-color);
        }
        .btn-secondary:hover { border-color: var(--primary); color: var(--primary); transform: translateY(-2px); }
        .btn-sm { padding: 8px 20px; font-size: 0.85rem; }
        .btn-lg { padding: 16px 36px; font-size: 1.05rem; }
        .btn .fa-arrow-right { transition: var(--transition); }
        .btn:hover .fa-arrow-right { transform: translateX(4px); }

        /* ===== Header / Nav ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(15,15,26,0.88);
            backdrop-filter: blur(18px) saturate(1.2);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-primary);
            text-decoration: none;
        }
        .logo i { color: var(--primary); font-size: 1.6rem; }
        .logo span { background: linear-gradient(135deg, var(--primary), #fbd26a); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .logo:hover { opacity: 0.9; color: var(--text-primary); }
        .nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav a {
            color: var(--text-secondary);
            font-weight: 500;
            font-size: 0.95rem;
            position: relative;
            padding: 4px 0;
            transition: var(--transition);
            text-decoration: none;
        }
        .nav a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2.5px;
            background: var(--primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav a:hover { color: var(--text-primary); }
        .nav a:hover::after { width: 100%; }
        .nav a.active { color: var(--primary); }
        .nav a.active::after { width: 100%; }
        .nav-cta { margin-left: 8px; }
        .nav-cta .btn { padding: 8px 22px; font-size: 0.85rem; }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px;
        }
        .nav-toggle span {
            width: 26px;
            height: 2.5px;
            background: var(--text-primary);
            border-radius: 4px;
            transition: var(--transition);
        }
        .nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: rotate(45deg) translate(6px, 6px); }
        .nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
        .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: rotate(-45deg) translate(6px, -6px); }

        /* ===== Hero / Banner ===== */
        .page-banner {
            padding: 140px 0 80px;
            background: linear-gradient(160deg, #0f0f1a 0%, #1a1a2e 50%, #0f0f1a 100%);
            position: relative;
            overflow: hidden;
            min-height: 340px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.15;
            pointer-events: none;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 120px;
            background: linear-gradient(to top, var(--bg-body), transparent);
        }
        .page-banner .container { position: relative; z-index: 2; text-align: center; }
        .page-banner h1 { font-size: 3rem; margin-bottom: 16px; }
        .page-banner h1 i { color: var(--primary); margin-right: 10px; }
        .page-banner p { font-size: 1.15rem; max-width: 600px; margin: 0 auto; color: var(--text-secondary); }
        .banner-badge {
            display: inline-block;
            background: rgba(245,166,35,0.15);
            color: var(--primary);
            padding: 6px 20px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 16px;
            border: 1px solid rgba(245,166,35,0.2);
        }

        /* ===== Sections ===== */
        .section { padding: 80px 0; }
        .section-alt { background: var(--bg-section-alt); }

        /* ===== Filter Tabs ===== */
        .filter-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 40px;
            justify-content: center;
        }
        .filter-tab {
            padding: 8px 22px;
            border-radius: 50px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition);
        }
        .filter-tab:hover { border-color: var(--primary); color: var(--primary); }
        .filter-tab.active { background: var(--primary); color: #0f0f1a; border-color: var(--primary); font-weight: 600; }

        /* ===== Cards Grid ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }
        .card:hover { transform: translateY(-6px); border-color: var(--border-light); box-shadow: var(--shadow-md), var(--shadow-glow); }
        .card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            border-radius: 0;
            display: block;
        }
        .card-body { padding: 22px 24px 26px; }
        .card-tag {
            display: inline-block;
            background: rgba(124,58,237,0.15);
            color: var(--secondary-light);
            padding: 2px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .card-tag.hot { background: rgba(239,68,68,0.15); color: var(--accent); }
        .card-tag.basic { background: rgba(245,166,35,0.15); color: var(--primary); }
        .card h3 { font-size: 1.2rem; margin-bottom: 10px; }
        .card h3 a { color: var(--text-primary); text-decoration: none; }
        .card h3 a:hover { color: var(--primary); }
        .card p { font-size: 0.92rem; color: var(--text-muted); margin-bottom: 16px; }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            font-size: 0.82rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border-color);
            padding-top: 14px;
            margin-top: 4px;
        }
        .card-meta i { margin-right: 4px; }
        .card-meta .meta-item { display: flex; align-items: center; gap: 4px; }

        /* ===== Featured / Large Card ===== */
        .featured-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            margin-bottom: 50px;
        }
        .featured-card .fc-img { height: 100%; min-height: 320px; object-fit: cover; border-radius: 0; }
        .featured-card .fc-body { padding: 40px 40px 40px 0; display: flex; flex-direction: column; justify-content: center; }
        .featured-card .fc-body .badge-lg {
            display: inline-block;
            background: rgba(245,166,35,0.15);
            color: var(--primary);
            padding: 4px 18px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            margin-bottom: 16px;
            width: fit-content;
        }
        .featured-card .fc-body h2 { font-size: 1.8rem; margin-bottom: 16px; }
        .featured-card .fc-body p { font-size: 1rem; color: var(--text-secondary); margin-bottom: 24px; }

        /* ===== Step / Process ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 20px;
        }
        .step-item {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
        }
        .step-item:hover { border-color: var(--border-light); transform: translateY(-4px); box-shadow: var(--shadow-sm); }
        .step-number {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #0f0f1a;
            font-size: 1.3rem;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            box-shadow: 0 4px 16px rgba(245,166,35,0.25);
        }
        .step-item h4 { font-size: 1.05rem; margin-bottom: 8px; }
        .step-item p { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 0; }
        .step-arrow {
            font-size: 1.4rem;
            color: var(--primary);
            position: absolute;
            right: -18px;
            top: 50%;
            transform: translateY(-50%);
        }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--border-light); }
        .faq-question {
            padding: 20px 24px;
            font-weight: 600;
            font-size: 1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            color: var(--text-primary);
            gap: 16px;
            user-select: none;
        }
        .faq-question i { color: var(--primary); transition: var(--transition); font-size: 0.9rem; }
        .faq-item.open .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer { display: block; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(160deg, #1a1a2e, #0f0f1a);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
            text-align: center;
            padding: 80px 0;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.png') center/cover no-repeat;
            opacity: 0.08;
            pointer-events: none;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 { font-size: 2.2rem; margin-bottom: 16px; }
        .cta-section p { font-size: 1.1rem; max-width: 560px; margin: 0 auto 32px; color: var(--text-secondary); }
        .cta-buttons { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo { font-size: 1.3rem; margin-bottom: 14px; }
        .footer-brand p { font-size: 0.9rem; color: var(--text-muted); max-width: 320px; }
        .footer-col h4 { font-size: 0.95rem; margin-bottom: 18px; color: var(--text-primary); font-weight: 600; }
        .footer-col a {
            display: block;
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 10px;
            transition: var(--transition);
        }
        .footer-col a:hover { color: var(--primary); padding-left: 4px; }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .footer-bottom a { color: var(--text-muted); }
        .footer-bottom a:hover { color: var(--primary); }

        /* ===== Mobile Nav ===== */
        @media (max-width: 1024px) {
            .card-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .step-arrow { display: none; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .featured-card { grid-template-columns: 1fr; }
            .featured-card .fc-body { padding: 30px; }
            .featured-card .fc-img { width: 100%; height: 260px; }
        }

        @media (max-width: 768px) {
            .nav {
                position: fixed;
                top: 70px;
                left: 0;
                width: 100%;
                background: rgba(15,15,26,0.98);
                backdrop-filter: blur(18px);
                flex-direction: column;
                padding: 24px 28px;
                gap: 18px;
                border-bottom: 1px solid var(--border-color);
                transform: translateY(-120%);
                opacity: 0;
                pointer-events: none;
                transition: var(--transition);
                align-items: flex-start;
            }
            .nav.open { transform: translateY(0); opacity: 1; pointer-events: all; }
            .nav-cta { margin-left: 0; width: 100%; }
            .nav-cta .btn { width: 100%; justify-content: center; }
            .nav-toggle { display: flex; }
            .page-banner h1 { font-size: 2rem; }
            .page-banner { padding: 120px 0 60px; min-height: 280px; }
            h2 { font-size: 1.6rem; }
            .card-grid { grid-template-columns: 1fr; gap: 20px; }
            .steps-grid { grid-template-columns: 1fr; gap: 16px; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .cta-section h2 { font-size: 1.6rem; }
            .featured-card .fc-body h2 { font-size: 1.4rem; }
            .filter-tabs { gap: 8px; }
            .filter-tab { padding: 6px 16px; font-size: 0.82rem; }
            .section { padding: 50px 0; }
            .footer-bottom { flex-direction: column; align-items: center; text-align: center; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .page-banner h1 { font-size: 1.6rem; }
            .btn-lg { padding: 14px 28px; font-size: 0.95rem; }
            .card-body { padding: 18px 18px 22px; }
            .featured-card .fc-body { padding: 20px; }
        }

        /* ===== Extra Utilities ===== */
        .text-center { text-align: center; }
        .mt-20 { margin-top: 20px; }
        .mb-20 { margin-bottom: 20px; }
        .gap-12 { gap: 12px; }
        .flex-center { display: flex; align-items: center; justify-content: center; }