/* roulang page: index */
:root {
            --primary: #2C7BE5;
            --primary-hover: #2468c4;
            --primary-light: #E8F0FE;
            --primary-soft: #F0F6FF;
            --bg: #F8FAFC;
            --card-bg: #FFFFFF;
            --text-title: #0B1E33;
            --text-body: #4A5568;
            --text-muted: #A0AEC0;
            --text-light: #718096;
            --border: #E2E8F0;
            --border-light: #EDF2F7;
            --accent: #F59E0B;
            --accent-soft: #FEF3C7;
            --footer-bg: #1A202C;
            --footer-text: #A0AEC0;
            --footer-text-light: #718096;
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-full: 40px;
            --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.04);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.06);
            --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.08);
            --shadow-xl: 0 16px 40px rgba(0, 0, 0, 0.1);
            --transition: 0.2s ease;
            --container-padding: 5%;
            --section-gap: 120px;
            --section-gap-mobile: 60px;
            --nav-height: 60px;
            --header-font: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --body-font: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
        }

        *,
        *::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(--body-font);
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-body);
            background: var(--bg);
            overflow-x: hidden;
        }

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

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

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

        button {
            font-family: var(--body-font);
            cursor: pointer;
            border: none;
            background: none;
            font-size: 16px;
        }

        input {
            font-family: var(--body-font);
            outline: none;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: var(--container-padding);
            padding-right: var(--container-padding);
        }

        .section {
            padding: var(--section-gap) 0;
        }

        .section-mobile-pad {
            padding: var(--section-gap-mobile) 0;
        }

        .section-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 6px 16px;
            border-radius: 20px;
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        .section-title {
            font-size: 28px;
            font-weight: 600;
            color: var(--text-title);
            line-height: 1.4;
            margin-bottom: 12px;
            letter-spacing: -0.2px;
        }

        .section-desc {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.75;
            max-width: 680px;
            margin-bottom: 40px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 28px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            line-height: 1.2;
            transition: all var(--transition);
            min-height: 44px;
            text-align: center;
            white-space: nowrap;
            letter-spacing: 0.3px;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border: 2px solid var(--primary);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            border-color: var(--primary-hover);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(44, 123, 229, 0.3);
        }

        .btn-primary:focus-visible {
            outline: 3px solid rgba(44, 123, 229, 0.4);
            outline-offset: 2px;
        }

        .btn-outline {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary-light);
            color: var(--primary-hover);
            border-color: var(--primary-hover);
            transform: translateY(-2px);
        }

        .btn-outline:focus-visible {
            outline: 3px solid rgba(44, 123, 229, 0.4);
            outline-offset: 2px;
        }

        .btn-white {
            background: #fff;
            color: var(--primary);
            border: 2px solid #fff;
        }

        .btn-white:hover {
            background: rgba(255, 255, 255, 0.9);
            border-color: rgba(255, 255, 255, 0.9);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
        }

        .btn-ghost-white {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255, 255, 255, 0.7);
        }

        .btn-ghost-white:hover {
            background: rgba(255, 255, 255, 0.15);
            border-color: #fff;
            color: #fff;
            transform: translateY(-2px);
        }

        /* ============ 导航 Navigation ============ */
        .site-nav {
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 1000;
            width: calc(100% - 40px);
            max-width: 1200px;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-radius: var(--radius-full);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.5);
            height: var(--nav-height);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 24px;
            transition: box-shadow var(--transition), background var(--transition);
        }

        .site-nav.scrolled {
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
            background: rgba(255, 255, 255, 0.95);
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 18px;
            color: var(--primary);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

        .nav-logo svg {
            flex-shrink: 0;
        }

        .nav-logo:hover {
            color: var(--primary-hover);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
            list-style: none;
        }

        .nav-links a {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            padding: 8px 4px;
            position: relative;
            white-space: nowrap;
            transition: color var(--transition);
        }

        .nav-links a:hover {
            color: var(--primary);
        }

        .nav-links a.active {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
            min-width: 44px;
            min-height: 44px;
            align-items: center;
            justify-content: center;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-title);
            border-radius: 2px;
            transition: all var(--transition);
        }

        .nav-toggle:hover {
            background: var(--primary-light);
        }

        .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);
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: calc(var(--nav-height) + 28px);
            left: 20px;
            right: 20px;
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-xl);
            z-index: 999;
            padding: 16px;
            border: 1px solid var(--border-light);
        }

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

        .mobile-menu a {
            display: block;
            padding: 14px 16px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: var(--radius-sm);
            transition: all var(--transition);
        }

        .mobile-menu a:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .mobile-menu a.active {
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 600;
        }

        /* ============ Hero ============ */
        .hero {
            position: relative;
            min-height: 85vh;
            min-height: 600px;
            display: flex;
            align-items: center;
            justify-content: center;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            margin-top: 0;
            padding-top: 100px;
            padding-bottom: 80px;
            isolation: isolate;
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(44, 123, 229, 0.75) 0%, rgba(0, 0, 0, 0.45) 100%);
            z-index: -1;
        }

        .hero-content {
            max-width: 720px;
            text-align: center;
            color: #fff;
            padding: 0 16px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: 20px;
            padding: 8px 18px;
            font-size: 14px;
            font-weight: 500;
            margin-bottom: 24px;
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
        }

        .hero-badge .live-dot {
            width: 8px;
            height: 8px;
            background: #F59E0B;
            border-radius: 50%;
            animation: pulse-dot 1.5s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.5;
                transform: scale(1.5);
            }
        }

        .hero h1 {
            font-size: 40px;
            font-weight: 700;
            line-height: 1.2;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: -0.5px;
            text-wrap: balance;
        }

        .hero-sub {
            font-size: 17px;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.9);
            margin-bottom: 32px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-cta {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }

        .hero-countdown {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            background: rgba(0, 0, 0, 0.25);
            border-radius: var(--radius-md);
            padding: 16px 24px;
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            max-width: 480px;
            margin: 0 auto;
        }

        .countdown-item {
            text-align: center;
        }

        .countdown-item .number {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            line-height: 1;
        }

        .countdown-item .label {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.7);
            margin-top: 4px;
        }

        .countdown-sep {
            font-size: 24px;
            color: rgba(255, 255, 255, 0.5);
            font-weight: 300;
        }

        /* ============ 分类入口 ============ */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: -40px;
            position: relative;
            z-index: 10;
        }

        .category-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            box-shadow: var(--shadow-sm);
            text-align: center;
            transition: all var(--transition);
            border: 1px solid var(--border-light);
            cursor: pointer;
            position: relative;
            overflow: hidden;
        }

        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--primary);
            opacity: 0;
            transition: opacity var(--transition);
        }

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

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

        .category-card .cat-icon {
            font-size: 36px;
            margin-bottom: 12px;
            display: block;
        }

        .category-card .cat-name {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-title);
            margin-bottom: 6px;
        }

        .category-card .cat-count {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* ============ 卖点三连 ============ */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .feature-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 32px 28px;
            box-shadow: var(--shadow-sm);
            transition: all var(--transition);
            border: 1px solid var(--border-light);
        }

        .feature-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
        }

        .feature-card .feature-icon {
            width: 52px;
            height: 52px;
            background: var(--primary-light);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: var(--primary);
            font-size: 24px;
        }

        .feature-card h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-title);
            margin-bottom: 10px;
            letter-spacing: -0.2px;
        }

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

        /* ============ 场景演示 ============ */
        .scene-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

        .scene-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-md);
        }

        .scene-image img {
            width: 100%;
            height: 400px;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .scene-image:hover img {
            transform: scale(1.03);
        }

        .scene-steps {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .step-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

        .step-number {
            flex-shrink: 0;
            width: 42px;
            height: 42px;
            border: 2px solid var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 16px;
            color: var(--primary);
            background: var(--card-bg);
            transition: all var(--transition);
        }

        .step-item:hover .step-number {
            background: var(--primary);
            color: #fff;
        }

        .step-text h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-title);
            margin-bottom: 4px;
        }

        .step-text p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ============ 社会认同 ============ */
        .testimonial-scroll {
            display: flex;
            gap: 20px;
            overflow-x: auto;
            padding: 20px 0;
            scroll-snap-type: x mandatory;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: thin;
            scrollbar-color: var(--border) transparent;
        }

        .testimonial-scroll::-webkit-scrollbar {
            height: 6px;
        }

        .testimonial-scroll::-webkit-scrollbar-track {
            background: transparent;
        }

        .testimonial-scroll::-webkit-scrollbar-thumb {
            background: var(--border);
            border-radius: 4px;
        }

        .testimonial-card {
            flex-shrink: 0;
            width: 300px;
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            scroll-snap-align: start;
            transition: all var(--transition);
        }

        .testimonial-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .testimonial-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 12px;
        }

        .testimonial-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            color: var(--primary);
            flex-shrink: 0;
            font-weight: 600;
        }

        .testimonial-name {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-title);
        }

        .testimonial-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 500;
            color: var(--primary);
            background: var(--primary-light);
            padding: 2px 10px;
            border-radius: 12px;
            margin-top: 2px;
        }

        .testimonial-comment {
            font-size: 14px;
            color: var(--text-body);
            line-height: 1.7;
            margin-bottom: 12px;
            font-style: italic;
        }

        .testimonial-footer {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .testimonial-stars {
            color: var(--accent);
            letter-spacing: 2px;
        }

        .stats-bar {
            display: flex;
            gap: 40px;
            justify-content: center;
            flex-wrap: wrap;
            margin-top: 40px;
            padding: 32px 20px;
            background: var(--card-bg);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }

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

        .stat-item .stat-number {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }

        .stat-item .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ============ 资讯区 ============ */
        .news-layout {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 32px;
        }

        .news-list {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }

        .news-list-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text-title);
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border-light);
        }

        .news-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 14px 0;
            border-bottom: 1px solid var(--border-light);
            transition: all var(--transition);
            border-radius: var(--radius-sm);
            padding-left: 12px;
            padding-right: 12px;
            margin-left: -12px;
            margin-right: -12px;
        }

        .news-item:last-child {
            border-bottom: none;
        }

        .news-item:hover {
            background: var(--primary-soft);
        }

        .news-item .news-tag {
            flex-shrink: 0;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 10px;
            border-radius: 12px;
            white-space: nowrap;
        }

        .news-item .news-title {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            flex: 1;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .news-item:hover .news-title {
            color: var(--primary);
        }

        .news-item .news-meta {
            flex-shrink: 0;
            font-size: 13px;
            color: var(--text-muted);
            white-space: nowrap;
        }

        .news-side {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .side-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 20px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }

        .side-card h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-title);
            margin-bottom: 12px;
        }

        .side-card .side-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 0;
            border-bottom: 1px solid var(--border-light);
            font-size: 14px;
            color: var(--text-body);
            transition: color var(--transition);
            cursor: pointer;
        }

        .side-card .side-item:last-child {
            border-bottom: none;
        }

        .side-card .side-item:hover {
            color: var(--primary);
        }

        .side-card .side-item .side-count {
            margin-left: auto;
            font-size: 12px;
            color: var(--text-muted);
            background: var(--bg);
            padding: 2px 8px;
            border-radius: 10px;
            flex-shrink: 0;
        }

        /* ============ 观点解读 ============ */
        .insight-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .insight-card {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
            transition: all var(--transition);
            border-left: 4px solid var(--primary);
        }

        .insight-card:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .insight-card .insight-quote {
            font-size: 15px;
            color: var(--text-body);
            line-height: 1.75;
            margin-bottom: 16px;
        }

        .insight-card .insight-source {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
        }

        /* ============ 版本更新 ============ */
        .changelog-list {
            background: var(--card-bg);
            border-radius: var(--radius-md);
            padding: 28px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-light);
        }

        .changelog-item {
            display: flex;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-light);
        }

        .changelog-item:last-child {
            border-bottom: none;
        }

        .changelog-version {
            flex-shrink: 0;
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            background: var(--primary-light);
            padding: 4px 12px;
            border-radius: 12px;
            height: fit-content;
            margin-top: 2px;
        }

        .changelog-text h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--text-title);
            margin-bottom: 4px;
        }

        .changelog-text p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* ============ FAQ ============ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card-bg);
            border-radius: var(--radius-sm);
            margin-bottom: 12px;
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: all var(--transition);
        }

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

        .faq-question {
            width: 100%;
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-title);
            cursor: pointer;
            transition: all var(--transition);
            min-height: 44px;
            text-align: left;
        }

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

        .faq-icon {
            flex-shrink: 0;
            font-size: 20px;
            color: var(--primary);
            transition: transform var(--transition);
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
            padding: 0 24px 18px;
        }

        .faq-answer p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.7;
        }

        /* ============ 底部转化条 ============ */
        .bottom-cta {
            background: var(--primary);
            padding: 28px 0;
            position: relative;
            overflow: hidden;
        }

        .bottom-cta::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -20%;
            width: 60%;
            height: 200%;
            background: rgba(255, 255, 255, 0.05);
            transform: rotate(20deg);
            pointer-events: none;
        }

        .bottom-cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .bottom-cta-text {
            color: #fff;
            font-size: 20px;
            font-weight: 600;
            letter-spacing: -0.2px;
        }

        .bottom-cta-sub {
            color: rgba(255, 255, 255, 0.8);
            font-size: 14px;
            margin-top: 4px;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: var(--footer-bg);
            color: var(--footer-text);
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }

        .footer-brand .footer-logo {
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-brand .footer-logo svg {
            color: var(--primary);
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--footer-text);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: var(--footer-text);
            padding: 6px 0;
            transition: color var(--transition);
        }

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

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: var(--footer-text-light);
        }

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

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

        /* ============ 响应式 ============ */
        @media (max-width: 1024px) {
            .category-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .scene-layout {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .scene-image img {
                height: 300px;
            }
            .news-layout {
                grid-template-columns: 1fr;
            }
            .insight-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: var(--section-gap-mobile);
                --container-padding: 16px;
            }

            .site-nav {
                top: 10px;
                width: calc(100% - 20px);
                height: 56px;
                padding: 0 16px;
                border-radius: 28px;
            }

            .nav-links {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .mobile-menu {
                top: calc(56px + 18px);
                left: 10px;
                right: 10px;
            }

            .hero {
                min-height: 70vh;
                padding-top: 80px;
                padding-bottom: 60px;
            }

            .hero h1 {
                font-size: 28px;
                letter-spacing: -0.3px;
            }

            .hero-sub {
                font-size: 15px;
            }

            .hero-cta {
                flex-direction: column;
                gap: 12px;
                width: 100%;
                max-width: 360px;
                margin-left: auto;
                margin-right: auto;
            }

            .hero-cta .btn {
                width: 100%;
            }

            .hero-countdown {
                gap: 12px;
                padding: 12px 16px;
            }

            .countdown-item .number {
                font-size: 22px;
            }

            .category-grid {
                grid-template-columns: 1fr;
                margin-top: -20px;
            }

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

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

            .scene-image img {
                height: 220px;
            }

            .step-item {
                gap: 12px;
            }

            .step-number {
                width: 36px;
                height: 36px;
                font-size: 14px;
            }

            .testimonial-card {
                width: 260px;
            }

            .stats-bar {
                flex-direction: column;
                gap: 16px;
                padding: 20px;
            }

            .stat-item .stat-number {
                font-size: 26px;
            }

            .news-list {
                padding: 16px;
            }

            .news-item {
                flex-wrap: wrap;
                gap: 8px;
            }

            .news-item .news-title {
                white-space: normal;
                width: 100%;
            }

            .news-item .news-meta {
                width: 100%;
                text-align: right;
            }

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .section-title {
                font-size: 24px;
            }

            .insight-card {
                padding: 20px 16px;
            }

            .changelog-item {
                flex-direction: column;
                gap: 8px;
            }
        }

        @media (max-width: 520px) {
            .hero h1 {
                font-size: 24px;
            }

            .hero-sub {
                font-size: 14px;
            }

            .hero-badge {
                font-size: 12px;
                padding: 6px 14px;
            }

            .category-card {
                padding: 18px 16px;
            }

            .category-card .cat-icon {
                font-size: 28px;
            }

            .feature-card .feature-icon {
                width: 44px;
                height: 44px;
                font-size: 20px;
            }

            .testimonial-card {
                width: 240px;
                padding: 18px;
            }

            .btn {
                padding: 12px 20px;
                font-size: 15px;
            }

            .bottom-cta-text {
                font-size: 17px;
            }

            .mobile-menu {
                padding: 12px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                transition-duration: 0.01ms !important;
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
            }
            html {
                scroll-behavior: auto;
            }
        }