/* roulang page: index */
/* ===== 设计变量 ===== */
        :root {
            --primary: #6C5CE7;
            --primary-dark: #5A4BD1;
            --primary-light: #8B7CF0;
            --secondary: #00CEC9;
            --secondary-dark: #00B5B0;
            --accent: #FD79A8;
            --bg-dark: #0D0D1A;
            --bg-dark-alt: #14142A;
            --bg-light: #F5F6FA;
            --bg-card: #FFFFFF;
            --text-primary: #1A1A2E;
            --text-secondary: #6B7280;
            --text-light: #9CA3AF;
            --text-white: #FFFFFF;
            --border: #E5E7EB;
            --border-light: rgba(255,255,255,0.1);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 8px 32px rgba(0,0,0,0.08);
            --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
            --shadow-glow: 0 0 40px rgba(108,92,231,0.3);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            --max-width: 1200px;
            --header-height: 76px;
        }

        /* ===== 基础 Reset ===== */
        *,
        *::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(--text-primary);
            background: var(--bg-light);
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.25;
            font-weight: 700;
            color: var(--text-primary);
        }

        /* ===== 容器 ===== */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
        }

        /* ===== 通用组件 ===== */
        .section-padding {
            padding: 96px 0;
        }
        @media (max-width: 768px) {
            .section-padding {
                padding: 64px 0;
            }
        }
        .section-title {
            font-size: 2.4rem;
            font-weight: 800;
            text-align: center;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            text-align: center;
            max-width: 640px;
            margin: 0 auto 56px;
            line-height: 1.7;
        }
        @media (max-width: 768px) {
            .section-title {
                font-size: 1.8rem;
            }
            .section-subtitle {
                font-size: 1rem;
                margin-bottom: 40px;
            }
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            white-space: nowrap;
            border: 2px solid transparent;
        }
        .btn-primary {
            background: var(--primary);
            color: var(--text-white);
            border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border-color: rgba(255, 255, 255, 0.4);
        }
        .btn-outline:hover {
            border-color: var(--text-white);
            background: rgba(255, 255, 255, 0.08);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }
        .btn-secondary {
            background: var(--secondary);
            color: #0D0D1A;
            border-color: var(--secondary);
        }
        .btn-secondary:hover {
            background: var(--secondary-dark);
            border-color: var(--secondary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 206, 201, 0.35);
        }
        .btn-lg {
            padding: 18px 42px;
            font-size: 1.05rem;
        }
        .btn-sm {
            padding: 10px 22px;
            font-size: 0.85rem;
        }
        .btn i {
            font-size: 1.1em;
        }

        .badge {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 600;
            background: rgba(108, 92, 231, 0.12);
            color: var(--primary);
            letter-spacing: 0.3px;
        }
        .badge-light {
            background: rgba(255, 255, 255, 0.15);
            color: var(--text-white);
        }
        .badge-secondary {
            background: rgba(0, 206, 201, 0.15);
            color: var(--secondary-dark);
        }

        .tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 6px;
            font-size: 0.78rem;
            font-weight: 500;
            background: var(--bg-light);
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .tag:hover {
            background: var(--primary);
            color: var(--text-white);
        }

        .divider {
            width: 60px;
            height: 4px;
            border-radius: 4px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            margin: 0 auto 24px;
        }

        /* ===== 头部 & 导航 ===== */
        .site-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 rgba(255, 255, 255, 0.06);
            height: var(--header-height);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(13, 13, 26, 0.98);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.5px;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #fff;
            font-weight: 700;
        }
        .logo span {
            background: linear-gradient(135deg, #fff 60%, rgba(255, 255, 255, 0.7));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-main a {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
            position: relative;
        }
        .nav-main a i {
            font-size: 0.9rem;
        }
        .nav-main a:hover {
            color: var(--text-white);
            background: rgba(255, 255, 255, 0.08);
        }
        .nav-main a.active {
            color: var(--text-white);
            background: rgba(108, 92, 231, 0.25);
        }
        .nav-main a.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            border-radius: 4px;
            background: var(--primary);
        }
        .nav-cta .btn {
            padding: 10px 24px;
            font-size: 0.85rem;
        }

        /* 汉堡菜单 */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            background: none;
            border: none;
            cursor: pointer;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--text-white);
            border-radius: 4px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            .nav-main {
                position: fixed;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: rgba(13, 13, 26, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px 32px;
                gap: 6px;
                transform: translateY(-110%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                pointer-events: none;
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .nav-main a {
                width: 100%;
                padding: 12px 20px;
                border-radius: 12px;
                font-size: 1rem;
            }
            .nav-main a.active::after {
                display: none;
            }
            .nav-main a.active {
                background: rgba(108, 92, 231, 0.2);
            }
            .nav-cta {
                display: none;
            }
            .nav-cta-mobile {
                display: block !important;
                margin-top: 10px;
                width: 100%;
            }
            .nav-cta-mobile .btn {
                width: 100%;
                justify-content: center;
            }
        }
        @media (min-width: 769px) {
            .nav-cta-mobile {
                display: none !important;
            }
        }

        /* ===== HERO 首屏 ===== */
        .hero {
            position: relative;
            min-height: 100vh;
            display: flex;
            align-items: center;
            padding-top: var(--header-height);
            background: var(--bg-dark);
            overflow: hidden;
        }
        .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;
        }
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(13, 13, 26, 0.88) 30%, rgba(13, 13, 26, 0.5) 70%, rgba(108, 92, 231, 0.15) 100%);
            z-index: 1;
        }
        .hero .container {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            padding-top: 40px;
            padding-bottom: 80px;
        }
        .hero-content {
            max-width: 600px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 20px;
            border-radius: 50px;
            background: rgba(108, 92, 231, 0.2);
            border: 1px solid rgba(108, 92, 231, 0.25);
            color: var(--primary-light);
            font-size: 0.85rem;
            font-weight: 500;
            margin-bottom: 28px;
            backdrop-filter: blur(4px);
        }
        .hero-badge i {
            font-size: 0.8rem;
            color: var(--secondary);
        }
        .hero-title {
            font-size: 3.6rem;
            font-weight: 900;
            color: var(--text-white);
            line-height: 1.1;
            letter-spacing: -1px;
            margin-bottom: 20px;
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.7);
            line-height: 1.8;
            margin-bottom: 36px;
            max-width: 520px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: 40px;
        }
        .hero-stats {
            display: flex;
            gap: 40px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-stat h3 {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-white);
            letter-spacing: -0.5px;
        }
        .hero-stat h3 span {
            color: var(--secondary);
        }
        .hero-stat p {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
            margin-top: 2px;
        }

        /* 倒计时 */
        .countdown-wrap {
            display: flex;
            align-items: center;
            gap: 16px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 14px;
            padding: 16px 24px;
            margin-bottom: 32px;
            backdrop-filter: blur(8px);
            max-width: 440px;
        }
        .countdown-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .countdown-label i {
            color: var(--accent);
        }
        .countdown-timer {
            display: flex;
            align-items: center;
            gap: 6px;
            margin-left: auto;
        }
        .countdown-timer .cd-item {
            background: rgba(255, 255, 255, 0.1);
            border-radius: 8px;
            padding: 6px 12px;
            text-align: center;
            min-width: 44px;
        }
        .countdown-timer .cd-item .num {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-white);
            line-height: 1.2;
        }
        .countdown-timer .cd-item .label {
            font-size: 0.6rem;
            color: rgba(255, 255, 255, 0.4);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .countdown-timer .cd-sep {
            font-size: 1.2rem;
            color: rgba(255, 255, 255, 0.3);
            font-weight: 300;
        }

        .hero-visual {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }
        .hero-visual-inner {
            position: relative;
            width: 100%;
            max-width: 520px;
            aspect-ratio: 4/3;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.06);
            box-shadow: 0 40px 80px rgba(0, 0, 0, 0.4);
        }
        .hero-visual-inner img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .hero-visual-inner:hover img {
            transform: scale(1.03);
        }
        .hero-visual-badge {
            position: absolute;
            bottom: 20px;
            left: 20px;
            background: rgba(13, 13, 26, 0.85);
            backdrop-filter: blur(8px);
            border-radius: 12px;
            padding: 12px 18px;
            display: flex;
            align-items: center;
            gap: 12px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }
        .hero-visual-badge i {
            font-size: 1.4rem;
            color: var(--secondary);
        }
        .hero-visual-badge .text {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.8);
        }
        .hero-visual-badge .text strong {
            display: block;
            font-size: 0.9rem;
            color: #fff;
        }

        @media (max-width: 1024px) {
            .hero .container {
                grid-template-columns: 1fr;
                gap: 40px;
                text-align: center;
            }
            .hero-content {
                max-width: 100%;
            }
            .hero-desc {
                margin: 0 auto 36px;
            }
            .hero-actions {
                justify-content: center;
            }
            .hero-stats {
                justify-content: center;
            }
            .countdown-wrap {
                margin: 0 auto 32px;
                max-width: 100%;
                justify-content: center;
            }
            .hero-visual {
                order: -1;
            }
            .hero-visual-inner {
                max-width: 440px;
                aspect-ratio: 4/3;
            }
            .hero-title {
                font-size: 2.8rem;
            }
        }
        @media (max-width: 520px) {
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .hero-stats {
                flex-wrap: wrap;
                gap: 24px;
            }
            .hero-stat h3 {
                font-size: 1.5rem;
            }
            .countdown-wrap {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                padding: 14px 18px;
            }
            .countdown-timer {
                margin-left: 0;
                width: 100%;
                justify-content: center;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                max-width: 280px;
            }
        }

        /* ===== 核心优势 / 权益卡 ===== */
        .advantages {
            background: var(--bg-light);
        }
        .adv-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .adv-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 40px 28px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
            position: relative;
            overflow: hidden;
        }
        .adv-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            opacity: 0;
            transition: var(--transition);
        }
        .adv-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }
        .adv-card:hover::before {
            opacity: 1;
        }
        .adv-icon {
            width: 64px;
            height: 64px;
            border-radius: 16px;
            background: linear-gradient(135deg, rgba(108, 92, 231, 0.1), rgba(0, 206, 201, 0.1));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            font-size: 1.6rem;
            color: var(--primary);
            transition: var(--transition);
        }
        .adv-card:hover .adv-icon {
            transform: scale(1.1);
            background: linear-gradient(135deg, rgba(108, 92, 231, 0.18), rgba(0, 206, 201, 0.18));
        }
        .adv-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .adv-card p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        @media (max-width: 1024px) {
            .adv-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .adv-grid {
                grid-template-columns: 1fr;
            }
            .adv-card {
                padding: 28px 20px;
            }
        }

        /* ===== 分类入口 ===== */
        .category-section {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .category-section .section-title {
            color: var(--text-white);
        }
        .category-section .section-subtitle {
            color: rgba(255, 255, 255, 0.6);
        }
        .category-section .divider {
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
        }

        .cat-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .cat-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: var(--transition);
            cursor: pointer;
            text-align: center;
            padding: 0;
        }
        .cat-card:hover {
            transform: translateY(-6px);
            border-color: rgba(108, 92, 231, 0.3);
            box-shadow: 0 20px 48px rgba(0, 0, 0, 0.3);
        }
        .cat-card-img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            transition: var(--transition);
        }
        .cat-card:hover .cat-card-img {
            transform: scale(1.05);
        }
        .cat-card-body {
            padding: 20px 24px 28px;
        }
        .cat-card-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 6px;
        }
        .cat-card-body p {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.6;
        }
        .cat-card-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            padding: 6px 16px;
            border-radius: 50px;
            background: rgba(13, 13, 26, 0.7);
            backdrop-filter: blur(8px);
            color: var(--text-white);
            font-size: 0.75rem;
            font-weight: 600;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        @media (max-width: 1024px) {
            .cat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .cat-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 热门资讯 / CMS 列表 ===== */
        .news-section {
            background: var(--bg-light);
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .news-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--border);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .news-card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            transition: var(--transition);
        }
        .news-card:hover .news-card-img {
            transform: scale(1.03);
        }
        .news-card-body {
            padding: 20px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.78rem;
            color: var(--text-light);
            margin-bottom: 10px;
        }
        .news-card-meta .cat {
            background: rgba(108, 92, 231, 0.1);
            color: var(--primary);
            padding: 2px 12px;
            border-radius: 50px;
            font-weight: 600;
        }
        .news-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.45;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .news-card-body h3 a {
            color: var(--text-primary);
        }
        .news-card-body h3 a:hover {
            color: var(--primary);
        }
        .news-card-body p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
            flex: 1;
        }
        .news-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border);
            font-size: 0.78rem;
            color: var(--text-light);
        }
        .news-card-footer a {
            color: var(--primary);
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .news-card-footer a:hover {
            color: var(--primary-dark);
        }
        .news-empty {
            grid-column: 1 / -1;
            text-align: center;
            padding: 60px 20px;
            color: var(--text-secondary);
            font-size: 1.05rem;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px dashed var(--border);
        }
        .news-empty i {
            font-size: 2.4rem;
            color: var(--text-light);
            margin-bottom: 16px;
            display: block;
        }

        @media (max-width: 1024px) {
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .news-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ===== 平台特色 ===== */
        .features {
            background: var(--bg-card);
        }
        .features-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px;
            align-items: center;
        }
        .features-visual {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-lg);
            position: relative;
        }
        .features-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            aspect-ratio: 4/3;
        }
        .features-visual::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(108, 92, 231, 0.1), transparent);
            pointer-events: none;
        }
        .features-list {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }
        .feature-item {
            display: flex;
            gap: 18px;
            padding: 20px 24px;
            border-radius: var(--radius-sm);
            background: var(--bg-light);
            transition: var(--transition);
            border: 1px solid transparent;
        }
        .feature-item:hover {
            border-color: var(--border);
            background: var(--bg-card);
            box-shadow: var(--shadow);
        }
        .feature-item-icon {
            width: 48px;
            height: 48px;
            min-width: 48px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(108, 92, 231, 0.12), rgba(0, 206, 201, 0.12));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: var(--primary);
        }
        .feature-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .feature-item p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        @media (max-width: 1024px) {
            .features-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .features-visual {
                order: -1;
            }
        }
        @media (max-width: 520px) {
            .feature-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
                padding: 18px;
            }
        }

        /* ===== 使用流程 ===== */
        .process {
            background: var(--bg-dark);
            color: var(--text-white);
        }
        .process .section-title {
            color: var(--text-white);
        }
        .process .section-subtitle {
            color: rgba(255, 255, 255, 0.6);
        }
        .process .divider {
            background: linear-gradient(135deg, var(--primary-light), var(--secondary));
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            position: relative;
        }
        .process-grid::before {
            content: '';
            position: absolute;
            top: 48px;
            left: 16%;
            right: 16%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary), var(--primary));
            opacity: 0.25;
        }
        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .process-step-num {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-white);
            box-shadow: 0 8px 32px rgba(108, 92, 231, 0.3);
            position: relative;
        }
        .process-step-num::after {
            content: '';
            position: absolute;
            inset: -4px;
            border-radius: 50%;
            border: 2px solid rgba(108, 92, 231, 0.2);
            animation: pulse-ring 2s ease-in-out infinite;
        }
        @keyframes pulse-ring {
            0%,
            100% {
                transform: scale(1);
                opacity: 0.5;
            }
            50% {
                transform: scale(1.1);
                opacity: 0;
            }
        }
        .process-step h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.7;
            max-width: 280px;
            margin: 0 auto;
        }

        @media (max-width: 768px) {
            .process-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .process-grid::before {
                display: none;
            }
            .process-step p {
                max-width: 100%;
            }
        }

        /* ===== FAQ ===== */
        .faq {
            background: var(--bg-light);
        }
        .faq-list {
            max-width: 720px;
            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);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: rgba(108, 92, 231, 0.2);
        }
        .faq-item.active {
            border-color: var(--primary);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            background: none;
            text-align: left;
            cursor: pointer;
            transition: var(--transition);
            gap: 16px;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-light);
            transition: var(--transition);
            flex-shrink: 0;
        }
        .faq-item.active .faq-question i {
            transform: rotate(180deg);
            color: var(--primary);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            max-height: 240px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--bg-dark);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
            text-align: center;
            padding-top: 80px;
            padding-bottom: 80px;
        }
        .cta-section .section-title {
            color: var(--text-white);
        }
        .cta-section .section-subtitle {
            color: rgba(255, 255, 255, 0.6);
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
            margin-top: 36px;
        }
        .cta-badge {
            display: inline-block;
            padding: 8px 20px;
            border-radius: 50px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.82rem;
            margin-bottom: 24px;
        }
        .cta-badge i {
            color: var(--secondary);
            margin-right: 6px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: #0A0A18;
            color: rgba(255, 255, 255, 0.6);
            padding: 48px 0 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .logo {
            margin-bottom: 14px;
        }
        .footer-brand p {
            font-size: 0.88rem;
            line-height: 1.8;
            max-width: 320px;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 18px;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            font-size: 0.88rem;
            color: rgba(255, 255, 255, 0.5);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-col ul li a:hover {
            color: var(--primary-light);
            transform: translateX(4px);
        }
        .footer-col ul li a i {
            font-size: 0.7rem;
            color: var(--primary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.35);
        }
        .footer-bottom a:hover {
            color: var(--primary-light);
        }
        .footer-social {
            display: flex;
            gap: 12px;
        }
        .footer-social a {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.4);
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: var(--text-white);
            transform: translateY(-2px);
        }

        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* ===== 响应式微调 ===== */
        @media (max-width: 1024px) {
            .section-padding {
                padding: 72px 0;
            }
        }
        @media (max-width: 520px) {
            .section-padding {
                padding: 48px 0;
            }
            .hero {
                min-height: auto;
            }
            .hero .container {
                padding-top: 20px;
                padding-bottom: 48px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .btn-lg {
                padding: 14px 28px;
                font-size: 0.95rem;
            }
        }

        /* ===== 滚动渐入动画 ===== */
        .fade-up {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== 辅助类 ===== */
        .text-center {
            text-align: center;
        }
        .mt-16 {
            margin-top: 16px;
        }
        .mt-24 {
            margin-top: 24px;
        }
        .mb-16 {
            margin-bottom: 16px;
        }
        .mb-24 {
            margin-bottom: 24px;
        }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --primary: #6c5ce7;
            --primary-dark: #5a4bd1;
            --primary-light: #a29bfe;
            --secondary: #fd79a8;
            --accent: #fdcb6e;
            --bg-dark: #0f0e1a;
            --bg-card: #1a1833;
            --bg-section: #14122a;
            --bg-light: #f8f7ff;
            --text-light: #ffffff;
            --text-muted: #b0aed0;
            --text-dark: #1a1a2e;
            --border-color: rgba(108, 92, 231, 0.2);
            --radius: 16px;
            --radius-sm: 10px;
            --radius-lg: 24px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
            --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.15);
            --shadow-glow: 0 0 40px rgba(108, 92, 231, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            --container: 1200px;
            --nav-height: 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-sans);
            background: var(--bg-dark);
            color: var(--text-light);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-light); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; transition: var(--transition); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; }

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

        /* ===== Header / Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(15, 14, 26, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(108, 92, 231, 0.15);
            height: var(--nav-height);
            transition: var(--transition);
        }
        .site-header.scrolled {
            background: rgba(15, 14, 26, 0.95);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
            gap: 16px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-light);
            flex-shrink: 0;
        }
        .logo .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            color: #fff;
            box-shadow: 0 4px 15px rgba(108, 92, 231, 0.3);
        }
        .nav-main {
            display: flex;
            align-items: center;
            gap: 8px;
            flex: 1;
            justify-content: center;
        }
        .nav-main a {
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            transition: var(--transition);
            display: flex;
            align-items: center;
            gap: 8px;
            white-space: nowrap;
        }
        .nav-main a i { font-size: 0.9rem; }
        .nav-main a:hover,
        .nav-main a.active {
            color: var(--text-light);
            background: rgba(108, 92, 231, 0.15);
        }
        .nav-main a.active {
            background: linear-gradient(135deg, rgba(108, 92, 231, 0.25), rgba(253, 121, 168, 0.1));
            box-shadow: 0 0 20px rgba(108, 92, 231, 0.05);
        }
        .nav-cta { flex-shrink: 0; }
        .nav-cta-mobile { display: none; }

        /* ===== Buttons ===== */
        .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;
            background: transparent;
            color: var(--text-light);
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            box-shadow: 0 4px 20px rgba(108, 92, 231, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(108, 92, 231, 0.4);
            color: #fff;
        }
        .btn-outline {
            border: 2px solid rgba(108, 92, 231, 0.4);
            color: var(--text-light);
            background: transparent;
        }
        .btn-outline:hover {
            border-color: var(--primary);
            background: rgba(108, 92, 231, 0.1);
            transform: translateY(-2px);
        }
        .btn-sm { padding: 8px 20px; font-size: 0.85rem; }
        .btn-lg { padding: 16px 36px; font-size: 1.1rem; }
        .btn i { font-size: 1rem; }

        /* ===== Hamburger ===== */
        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 44px;
            height: 44px;
            background: rgba(108, 92, 231, 0.1);
            border-radius: var(--radius-sm);
            cursor: pointer;
            border: none;
            gap: 5px;
            flex-shrink: 0;
        }
        .hamburger span {
            display: block;
            width: 22px;
            height: 2.5px;
            background: var(--text-light);
            border-radius: 4px;
            transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

        /* ===== Page Banner ===== */
        .page-banner {
            position: relative;
            padding: 140px 0 60px;
            background: linear-gradient(135deg, #0f0e1a 0%, #1a1833 50%, #14122a 100%);
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.12;
            z-index: 0;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(108, 92, 231, 0.08), transparent 70%);
            border-radius: 50%;
            z-index: 0;
        }
        .page-banner .container {
            position: relative;
            z-index: 1;
        }
        .page-banner .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .page-banner .breadcrumb a { color: var(--text-muted); }
        .page-banner .breadcrumb a:hover { color: var(--primary-light); }
        .page-banner .breadcrumb .sep { color: rgba(176, 174, 208, 0.4); }
        .page-banner .breadcrumb .current { color: var(--primary-light); }
        .page-banner h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--text-light);
            max-width: 900px;
            line-height: 1.25;
            margin-bottom: 16px;
        }
        .page-banner .meta-line {
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .page-banner .meta-line span {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .page-banner .meta-line .category-tag {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            padding: 4px 14px;
            border-radius: 20px;
            color: #fff;
            font-size: 0.8rem;
            font-weight: 600;
        }

        /* ===== Article Content ===== */
        .article-section {
            padding: 60px 0 80px;
            background: var(--bg-dark);
        }
        .article-layout {
            display: grid;
            grid-template-columns: 1fr 340px;
            gap: 48px;
            align-items: start;
        }
        .article-main {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 48px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }
        .article-main .featured-image {
            width: 100%;
            border-radius: var(--radius-sm);
            margin-bottom: 32px;
            overflow: hidden;
        }
        .article-main .featured-image img {
            width: 100%;
            height: auto;
            max-height: 480px;
            object-fit: cover;
        }
        .article-body {
            font-size: 1.05rem;
            line-height: 1.9;
            color: rgba(255, 255, 255, 0.88);
        }
        .article-body p {
            margin-bottom: 1.4em;
        }
        .article-body h2 {
            font-size: 1.6rem;
            margin: 1.8em 0 0.8em;
            color: var(--text-light);
        }
        .article-body h3 {
            font-size: 1.3rem;
            margin: 1.4em 0 0.6em;
            color: var(--text-light);
        }
        .article-body ul, .article-body ol {
            margin: 1em 0;
            padding-left: 1.6em;
        }
        .article-body ul li {
            list-style: disc;
            margin-bottom: 0.4em;
        }
        .article-body ol li {
            list-style: decimal;
            margin-bottom: 0.4em;
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(108, 92, 231, 0.08);
            padding: 16px 24px;
            margin: 1.4em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-muted);
        }
        .article-body a {
            color: var(--primary-light);
            text-decoration: underline;
        }
        .article-body a:hover { color: var(--secondary); }
        .article-body img {
            border-radius: var(--radius-sm);
            margin: 1.4em 0;
        }
        .article-body .content-empty {
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
        }
        .article-body .content-empty i { font-size: 3rem; margin-bottom: 16px; opacity: 0.3; }
        .article-body .content-empty p { margin-bottom: 12px; font-size: 1.1rem; }
        .article-body .content-empty .btn { margin-top: 12px; }

        /* ===== Article Sidebar ===== */
        .article-sidebar {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .sidebar-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px;
            border: 1px solid var(--border-color);
        }
        .sidebar-card h3 {
            font-size: 1.1rem;
            margin-bottom: 18px;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 10px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border-color);
        }
        .sidebar-card h3 i { color: var(--primary-light); }
        .sidebar-related li {
            padding: 12px 0;
            border-bottom: 1px solid rgba(108, 92, 231, 0.06);
        }
        .sidebar-related li:last-child { border-bottom: none; }
        .sidebar-related a {
            display: flex;
            gap: 12px;
            align-items: flex-start;
            color: var(--text-muted);
            transition: var(--transition);
        }
        .sidebar-related a:hover { color: var(--text-light); }
        .sidebar-related a .related-img {
            width: 70px;
            height: 50px;
            border-radius: 8px;
            object-fit: cover;
            flex-shrink: 0;
            background: rgba(108, 92, 231, 0.1);
        }
        .sidebar-related a .related-info { flex: 1; }
        .sidebar-related a .related-info .related-title {
            font-size: 0.9rem;
            font-weight: 600;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            line-height: 1.4;
        }
        .sidebar-related a .related-info .related-date {
            font-size: 0.75rem;
            color: rgba(176, 174, 208, 0.5);
            margin-top: 4px;
        }
        .sidebar-card .cat-list li {
            padding: 8px 0;
            border-bottom: 1px solid rgba(108, 92, 231, 0.06);
        }
        .sidebar-card .cat-list li:last-child { border-bottom: none; }
        .sidebar-card .cat-list a {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .sidebar-card .cat-list a:hover { color: var(--primary-light); }
        .sidebar-card .cat-list a i { font-size: 0.7rem; color: var(--primary-light); }
        .sidebar-cta {
            background: linear-gradient(135deg, rgba(108, 92, 231, 0.15), rgba(253, 121, 168, 0.05));
            text-align: center;
            padding: 32px 24px;
        }
        .sidebar-cta h4 { font-size: 1.1rem; margin-bottom: 8px; }
        .sidebar-cta p { font-size: 0.9rem; color: var(--text-muted); margin-bottom: 20px; }
        .sidebar-cta .btn { width: 100%; justify-content: center; }

        /* ===== Footer ===== */
        .site-footer {
            background: #0a0a14;
            border-top: 1px solid rgba(108, 92, 231, 0.08);
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(108, 92, 231, 0.08);
        }
        .footer-brand .logo { font-size: 1.3rem; margin-bottom: 16px; }
        .footer-brand p { color: var(--text-muted); font-size: 0.92rem; line-height: 1.7; max-width: 360px; }
        .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: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-col ul li a:hover { color: var(--primary-light); }
        .footer-col ul li a i { font-size: 0.65rem; color: var(--primary-light); }
        .footer-col ul li a .fab { font-size: 1rem; }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 24px 0;
            gap: 20px;
            flex-wrap: wrap;
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .footer-social { display: flex; gap: 16px; }
        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(108, 92, 231, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--text-muted);
            font-size: 1.1rem;
            transition: var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }

        /* ===== Not Found ===== */
        .not-found-section {
            padding: 120px 0 80px;
            text-align: center;
            background: var(--bg-dark);
            min-height: 60vh;
            display: flex;
            align-items: center;
        }
        .not-found-section .not-found-icon {
            font-size: 4rem;
            color: var(--primary-light);
            opacity: 0.2;
            margin-bottom: 20px;
        }
        .not-found-section h1 { font-size: 2rem; margin-bottom: 12px; }
        .not-found-section p { color: var(--text-muted); margin-bottom: 24px; font-size: 1.1rem; }
        .not-found-section .btn { margin-top: 8px; }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .article-layout { grid-template-columns: 1fr; gap: 32px; }
            .article-main { padding: 32px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
            .page-banner h1 { font-size: 2.2rem; }
        }
        @media (max-width: 768px) {
            :root { --nav-height: 64px; }
            .nav-main {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(15, 14, 26, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px 24px;
                gap: 6px;
                transform: translateY(-120%);
                opacity: 0;
                transition: var(--transition);
                border-bottom: 1px solid rgba(108, 92, 231, 0.15);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
                pointer-events: none;
                border-radius: 0 0 var(--radius) var(--radius);
            }
            .nav-main.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: all;
            }
            .nav-main a {
                padding: 14px 18px;
                width: 100%;
                justify-content: flex-start;
                font-size: 1.05rem;
                border-radius: var(--radius-sm);
            }
            .nav-cta { display: none; }
            .nav-cta-mobile { display: block; margin-top: 8px; width: 100%; }
            .nav-cta-mobile .btn { width: 100%; justify-content: center; }
            .hamburger { display: flex; }
            .page-banner { padding: 110px 0 40px; min-height: 200px; }
            .page-banner h1 { font-size: 1.6rem; }
            .page-banner .meta-line { gap: 12px; font-size: 0.85rem; }
            .article-main { padding: 24px 20px; }
            .article-body { font-size: 0.98rem; }
            .article-body h2 { font-size: 1.3rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .sidebar-card { padding: 20px; }
            .not-found-section h1 { font-size: 1.5rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .page-banner h1 { font-size: 1.3rem; }
            .article-main { padding: 16px; border-radius: var(--radius-sm); }
            .article-body { font-size: 0.92rem; }
            .btn-lg { padding: 14px 28px; font-size: 1rem; }
            .logo { font-size: 1.1rem; }
            .logo .logo-icon { width: 34px; height: 34px; font-size: 1rem; }
        }

        /* ===== Utility ===== */
        .text-center { text-align: center; }
        .mt-8 { margin-top: 8px; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mb-16 { margin-bottom: 16px; }
        .gap-8 { gap: 8px; }

/* roulang page: category1 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #f0506e;
            --primary-dark: #d43c58;
            --primary-light: #fce4e8;
            --secondary: #ffb347;
            --secondary-light: #fff0d6;
            --accent: #5b7fff;
            --accent-light: #e8edff;
            --bg-body: #f8f9fc;
            --bg-card: #ffffff;
            --bg-dark: #1a1a2e;
            --bg-dark2: #16213e;
            --text-primary: #1a1a2e;
            --text-secondary: #5a5a7a;
            --text-light: #8a8aaa;
            --text-white: #ffffff;
            --border-color: #e8e8f0;
            --border-light: #f0f0f8;
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-sm: 0 2px 12px rgba(0,0,0,0.06);
            --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
            --shadow-lg: 0 20px 50px rgba(0,0,0,0.12);
            --shadow-hover: 0 16px 48px rgba(240,80,110,0.18);
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --container-w: 1200px;
            --header-h: 72px;
        }

        /* ===== 基础重置 ===== */
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-primary);
            background: var(--bg-body);
        }
        a { color: var(--primary); text-decoration: none; transition: var(--transition); }
        a:hover { color: var(--primary-dark); }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-sm); }
        ul { list-style: none; }
        button, input, select, textarea { font-family: inherit; font-size: inherit; outline: none; border: none; }
        button { cursor: pointer; background: none; }
        .container { width: 100%; max-width: var(--container-w); margin: 0 auto; padding: 0 24px; }
        .container-narrow { max-width: 920px; }

        /* ===== 标题层级 ===== */
        h1 { font-size: 2.6rem; font-weight: 800; line-height: 1.25; letter-spacing: -0.02em; }
        h2 { font-size: 2.0rem; font-weight: 700; line-height: 1.3; letter-spacing: -0.01em; }
        h3 { font-size: 1.4rem; font-weight: 600; line-height: 1.4; }
        h4 { font-size: 1.15rem; font-weight: 600; line-height: 1.5; }
        .section-subtitle { font-size: 1.05rem; color: var(--text-secondary); margin-top: 8px; }
        .text-center { text-align: center; }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 12px 28px; border-radius: 50px;
            font-weight: 600; font-size: 0.95rem;
            transition: var(--transition); border: 2px solid transparent;
            letter-spacing: 0.01em; white-space: nowrap;
        }
        .btn-primary {
            background: var(--primary); color: #fff; border-color: var(--primary);
        }
        .btn-primary:hover {
            background: var(--primary-dark); border-color: var(--primary-dark);
            color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(240,80,110,0.35);
        }
        .btn-primary:active { transform: translateY(0); }
        .btn-secondary {
            background: var(--secondary); color: #fff; border-color: var(--secondary);
        }
        .btn-secondary:hover {
            background: #e69e30; border-color: #e69e30; color: #fff;
            transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,179,71,0.35);
        }
        .btn-outline {
            background: transparent; color: var(--primary); border-color: var(--primary);
        }
        .btn-outline:hover {
            background: var(--primary); color: #fff; transform: translateY(-2px);
        }
        .btn-sm { padding: 8px 20px; font-size: 0.85rem; }
        .btn-lg { padding: 16px 36px; font-size: 1.1rem; }
        .btn-white {
            background: #fff; color: var(--primary); border-color: #fff;
        }
        .btn-white:hover { background: var(--primary-light); color: var(--primary-dark); transform: translateY(-2px); }
        .btn:focus-visible { outline: 3px solid var(--primary); outline-offset: 2px; }

        /* ===== 标签 / 徽章 ===== */
        .badge {
            display: inline-block; padding: 4px 14px; border-radius: 50px;
            font-size: 0.78rem; font-weight: 600; letter-spacing: 0.02em;
        }
        .badge-hot { background: #fef0f0; color: #e53e3e; }
        .badge-new { background: #e6f7ee; color: #0a8f4c; }
        .badge-sale { background: var(--secondary-light); color: #b87a20; }
        .badge-primary { background: var(--primary-light); color: var(--primary); }

        /* ===== 卡片 ===== */
        .card {
            background: var(--bg-card); border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm); border: 1px solid var(--border-light);
            transition: var(--transition); overflow: hidden;
        }
        .card:hover {
            box-shadow: var(--shadow-md); transform: translateY(-4px);
        }
        .card-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; border-radius: var(--radius-sm) var(--radius-sm) 0 0; }
        .card-body { padding: 20px 24px 24px; }
        .card-title { font-size: 1.15rem; font-weight: 600; margin-bottom: 8px; }
        .card-text { font-size: 0.92rem; color: var(--text-secondary); line-height: 1.6; }
        .card-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px; }

        /* ===== 板块间距 ===== */
        .section { padding: 80px 0; }
        .section-header { margin-bottom: 48px; }
        .section-header h2 { margin-bottom: 8px; }
        .section-divider { width: 60px; height: 4px; background: var(--primary); border-radius: 4px; margin: 16px auto 0; }

        /* ===== header / nav ===== */
        .site-header {
            position: fixed; top: 0; left: 0; width: 100%; height: var(--header-h);
            background: rgba(255,255,255,0.92); backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-light); z-index: 1000;
            transition: var(--transition);
        }
        .site-header.scrolled { box-shadow: var(--shadow-sm); }
        .header-inner {
            display: flex; align-items: center; justify-content: space-between;
            height: var(--header-h);
        }
        .logo {
            display: flex; align-items: center; gap: 10px;
            font-size: 1.4rem; font-weight: 800; color: var(--text-primary);
            letter-spacing: -0.02em;
        }
        .logo:hover { color: var(--primary); }
        .logo-icon {
            display: inline-flex; align-items: center; justify-content: center;
            width: 40px; height: 40px; background: var(--primary);
            color: #fff; border-radius: 10px; font-size: 1.3rem; font-weight: 700;
        }
        .nav-main {
            display: flex; align-items: center; gap: 6px;
        }
        .nav-main a {
            padding: 8px 18px; border-radius: 30px;
            font-size: 0.92rem; font-weight: 500; color: var(--text-secondary);
            transition: var(--transition); position: relative;
        }
        .nav-main a i { margin-right: 6px; font-size: 0.85rem; }
        .nav-main a:hover { color: var(--primary); background: var(--primary-light); }
        .nav-main a.active { color: #fff; background: var(--primary); box-shadow: 0 4px 16px rgba(240,80,110,0.25); }
        .nav-cta { display: flex; align-items: center; gap: 12px; }
        .nav-cta-mobile { display: none; }
        .hamburger {
            display: none; flex-direction: column; gap: 5px;
            padding: 8px; border-radius: 8px;
        }
        .hamburger span {
            display: block; width: 26px; height: 3px; background: var(--text-primary);
            border-radius: 4px; transition: var(--transition);
        }
        .hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 6px); }
        .hamburger.active span:nth-child(2) { opacity: 0; }
        .hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -6px); }

        /* ===== 分类页 Banner ===== */
        .category-banner {
            padding: 140px 0 80px; position: relative;
            background: linear-gradient(135deg, var(--bg-dark) 0%, var(--bg-dark2) 100%);
            overflow: hidden;
        }
        .category-banner::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.15; mix-blend-mode: overlay;
        }
        .category-banner .container { position: relative; z-index: 2; }
        .category-banner h1 { color: var(--text-white); font-size: 2.8rem; margin-bottom: 16px; }
        .category-banner p { color: rgba(255,255,255,0.75); font-size: 1.15rem; max-width: 620px; }
        .banner-meta { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 24px; }
        .banner-meta span { color: rgba(255,255,255,0.6); font-size: 0.92rem; display: flex; align-items: center; gap: 6px; }
        .banner-meta i { color: var(--secondary); }

        /* ===== 活动分类筛选 ===== */
        .filter-bar {
            display: flex; flex-wrap: wrap; gap: 10px;
            padding: 16px 0; margin-bottom: 8px;
        }
        .filter-bar .filter-btn {
            padding: 8px 22px; border-radius: 50px; font-size: 0.88rem; font-weight: 500;
            background: var(--bg-card); color: var(--text-secondary);
            border: 1px solid var(--border-color); transition: var(--transition);
        }
        .filter-bar .filter-btn:hover { border-color: var(--primary); color: var(--primary); }
        .filter-bar .filter-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); box-shadow: 0 4px 16px rgba(240,80,110,0.2); }

        /* ===== 活动卡片网格 ===== */
        .activity-grid {
            display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
        }
        .activity-card { position: relative; }
        .activity-card .card-img-wrap { position: relative; overflow: hidden; border-radius: var(--radius-md) var(--radius-md) 0 0; }
        .activity-card .card-img-wrap img { transition: var(--transition); aspect-ratio: 16/10; width: 100%; object-fit: cover; }
        .activity-card:hover .card-img-wrap img { transform: scale(1.05); }
        .activity-card .card-overlay {
            position: absolute; top: 12px; left: 12px; display: flex; gap: 8px; flex-wrap: wrap;
        }
        .activity-card .card-body { padding: 18px 20px 20px; }
        .activity-card .card-title { font-size: 1.1rem; }
        .activity-card .card-meta { display: flex; justify-content: space-between; align-items: center; margin-top: 14px; font-size: 0.85rem; color: var(--text-light); }
        .activity-card .card-meta .deadline { color: var(--primary); font-weight: 600; }

        /* ===== 特色活动 ===== */
        .feature-activity {
            display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center;
            background: var(--bg-card); border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm); border: 1px solid var(--border-light);
            overflow: hidden; transition: var(--transition);
        }
        .feature-activity:hover { box-shadow: var(--shadow-md); }
        .feature-activity .fa-img { height: 100%; min-height: 300px; object-fit: cover; border-radius: 0; }
        .feature-activity .fa-body { padding: 40px 48px; }
        .feature-activity .fa-body h3 { font-size: 1.6rem; margin-bottom: 12px; }
        .feature-activity .fa-body p { color: var(--text-secondary); margin-bottom: 20px; }
        .feature-activity .fa-meta { display: flex; gap: 24px; flex-wrap: wrap; margin-bottom: 20px; }
        .feature-activity .fa-meta span { display: flex; align-items: center; gap: 6px; font-size: 0.9rem; color: var(--text-secondary); }
        .feature-activity .fa-meta i { color: var(--primary); }

        /* ===== 参与流程 ===== */
        .steps-grid {
            display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
        }
        .step-card {
            text-align: center; padding: 32px 20px; background: var(--bg-card);
            border-radius: var(--radius-md); border: 1px solid var(--border-light);
            box-shadow: var(--shadow-sm); transition: var(--transition); position: relative;
        }
        .step-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
        .step-num {
            width: 52px; height: 52px; margin: 0 auto 16px;
            display: flex; align-items: center; justify-content: center;
            background: var(--primary-light); color: var(--primary);
            border-radius: 50%; font-size: 1.4rem; font-weight: 700;
        }
        .step-card h4 { margin-bottom: 8px; }
        .step-card p { font-size: 0.9rem; color: var(--text-secondary); }

        /* ===== FAQ ===== */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-card); border-radius: var(--radius-md);
            border: 1px solid var(--border-light); margin-bottom: 12px;
            overflow: hidden; transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--primary-light); }
        .faq-q {
            padding: 18px 24px; display: flex; justify-content: space-between; align-items: center;
            font-weight: 600; cursor: pointer; font-size: 1.0rem;
            transition: var(--transition);
        }
        .faq-q i { transition: var(--transition); color: var(--text-light); font-size: 0.9rem; }
        .faq-item.active .faq-q i { transform: rotate(180deg); color: var(--primary); }
        .faq-a {
            padding: 0 24px; max-height: 0; overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            color: var(--text-secondary); font-size: 0.95rem; line-height: 1.7;
        }
        .faq-item.active .faq-a { max-height: 300px; padding: 0 24px 20px; }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--primary) 0%, #d43c58 100%);
            border-radius: var(--radius-lg); padding: 60px 48px;
            text-align: center; color: #fff; position: relative; overflow: hidden;
        }
        .cta-section::before {
            content: ''; position: absolute; inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08; mix-blend-mode: overlay;
        }
        .cta-section * { position: relative; z-index: 2; }
        .cta-section h2 { font-size: 2.0rem; margin-bottom: 12px; }
        .cta-section p { font-size: 1.1rem; opacity: 0.9; margin-bottom: 28px; }
        .cta-section .btn-white { font-size: 1.05rem; padding: 14px 36px; }

        /* ===== footer ===== */
        .site-footer {
            background: var(--bg-dark); color: rgba(255,255,255,0.7);
            padding: 60px 0 0;
        }
        .footer-grid { display: grid; grid-template-columns: 1.8fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand .logo { color: #fff; margin-bottom: 16px; }
        .footer-brand .logo .logo-icon { background: var(--primary); }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; max-width: 320px; }
        .footer-col h4 { color: #fff; font-size: 1.0rem; margin-bottom: 16px; font-weight: 600; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: rgba(255,255,255,0.6); font-size: 0.9rem; display: flex; align-items: center; gap: 8px; transition: var(--transition); }
        .footer-col ul li a i { font-size: 0.7rem; }
        .footer-col ul li a:hover { color: var(--primary); padding-left: 4px; }
        .footer-bottom {
            display: flex; justify-content: space-between; align-items: center;
            flex-wrap: wrap; gap: 16px; padding: 24px 0 28px;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 0.85rem; color: rgba(255,255,255,0.4);
        }
        .footer-social { display: flex; gap: 16px; }
        .footer-social a { color: rgba(255,255,255,0.4); font-size: 1.2rem; transition: var(--transition); }
        .footer-social a:hover { color: var(--primary); transform: scale(1.15); }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .activity-grid { grid-template-columns: repeat(2, 1fr); }
            .steps-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            h1 { font-size: 2.0rem; }
            h2 { font-size: 1.6rem; }
            .section { padding: 56px 0; }
            .nav-main {
                position: fixed; top: var(--header-h); left: 0; width: 100%;
                background: rgba(255,255,255,0.98); backdrop-filter: blur(16px);
                flex-direction: column; padding: 20px 24px; gap: 4px;
                border-bottom: 1px solid var(--border-light);
                transform: translateY(-120%); opacity: 0; pointer-events: none;
                transition: var(--transition); box-shadow: var(--shadow-lg);
            }
            .nav-main.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
            .nav-main a { width: 100%; padding: 12px 18px; font-size: 1.0rem; }
            .nav-main a i { width: 24px; }
            .nav-cta { display: none; }
            .nav-cta-mobile { display: block; margin-top: 12px; width: 100%; }
            .nav-cta-mobile .btn { width: 100%; justify-content: center; }
            .hamburger { display: flex; }
            .category-banner { padding: 120px 0 60px; }
            .category-banner h1 { font-size: 2.0rem; }
            .banner-meta { flex-direction: column; gap: 8px; }
            .activity-grid { grid-template-columns: 1fr; }
            .feature-activity { grid-template-columns: 1fr; }
            .feature-activity .fa-body { padding: 28px 24px; }
            .feature-activity .fa-img { min-height: 200px; }
            .steps-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .step-card { padding: 24px 16px; }
            .cta-section { padding: 40px 24px; }
            .cta-section h2 { font-size: 1.5rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            h1 { font-size: 1.6rem; }
            h2 { font-size: 1.3rem; }
            .section { padding: 40px 0; }
            .steps-grid { grid-template-columns: 1fr; }
            .filter-bar { gap: 8px; }
            .filter-bar .filter-btn { padding: 6px 16px; font-size: 0.8rem; }
            .activity-card .card-body { padding: 14px 16px 16px; }
            .feature-activity .fa-body { padding: 20px 16px; }
            .feature-activity .fa-body h3 { font-size: 1.2rem; }
            .faq-q { padding: 14px 16px; font-size: 0.92rem; }
            .faq-a { padding: 0 16px; font-size: 0.88rem; }
            .faq-item.active .faq-a { padding: 0 16px 16px; }
        }

        /* ===== 工具类 ===== */
        .mt-8 { margin-top: 8px; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mb-8 { margin-bottom: 8px; }
        .mb-16 { margin-bottom: 16px; }
        .mb-24 { margin-bottom: 24px; }
        .gap-8 { gap: 8px; }
        .gap-12 { gap: 12px; }
        .flex { display: flex; }
        .flex-wrap { flex-wrap: wrap; }
        .items-center { align-items: center; }
        .justify-center { justify-content: center; }
        .justify-between { justify-content: space-between; }
        .text-center { text-align: center; }
        .w-full { width: 100%; }