:root {
            --x7bg-primary: #FF6600;
            --x7bg-primary-hover: #E65C00;
            --x7bg-secondary: #2B2D42;
            --x7bg-accent: #FF8533;
            --x7bg-text-main: #1D1D1F;
            --x7bg-text-muted: #6E6E73;
            --x7bg-bg-light: #FBFBFD;
            --x7bg-white: #FFFFFF;
            --x7bg-container-max: 1360px;
            --x7bg-radius: 16px;
            --x7bg-transition: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
        }

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

        body {
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--x7bg-bg-light);
            color: var(--x7bg-text-main);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: break-word;
        }

        /* 导航栏 */
        .x7bg-nav-fixed {
            position: fixed;
            top: 16px;
            left: 50%;
            transform: translateX(-50%);
            width: 95vw;
            max-width: var(--x7bg-container-max);
            z-index: 1000;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(0, 0, 0, 0.05);
            border-radius: 40px;
            padding: 8px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.03);
        }

        .x7bg-logo {
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .x7bg-logo img {
            height: 32px;
            width: auto;
            display: block;
        }

        .x7bg-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 16px;
            min-width: 0;
        }

        .x7bg-menu a {
            text-decoration: none;
            color: var(--x7bg-text-main);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 20px;
            transition: var(--x7bg-transition);
        }

        .x7bg-menu a:hover {
            color: var(--x7bg-primary);
            background: rgba(255, 102, 0, 0.08);
        }

        /* Hero 区域 - 独特垂直堆叠结构 */
        .x7bg-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            text-align: center;
            position: relative;
            overflow: hidden;
            background: radial-gradient(circle at 50% -20%, #FFF5EF 0%, var(--x7bg-bg-light) 60%);
        }

        .x7bg-container {
            max-width: var(--x7bg-container-max);
            margin: 0 auto;
            padding: 0 32px;
            width: 100%;
        }

        .x7bg-hero-content {
            max-width: 900px;
            margin: 0 auto 64px;
        }

        .x7bg-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            font-weight: 700;
            line-height: 1.1;
            margin-bottom: 24px;
            letter-spacing: -0.02em;
            word-break: keep-all;
            background: linear-gradient(135deg, #1D1D1F 0%, #434343 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .x7bg-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.4rem);
            color: var(--x7bg-text-muted);
            max-width: 700px;
            margin: 0 auto 40px;
        }

        .x7bg-hero-preview {
            position: relative;
            width: 100%;
            max-width: 1000px;
            margin: 0 auto;
            perspective: 1000px;
        }

        .x7bg-hero-img-wrapper {
            box-shadow: 0 32px 80px rgba(0, 0, 0, 0.1);
            border-radius: 24px;
            overflow: hidden;
            transform: rotateX(5deg);
            transition: var(--x7bg-transition);
        }

        .x7bg-hero-img-wrapper:hover {
            transform: rotateX(0deg) translateY(-10px);
        }

        .x7bg-hero-img-wrapper img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* 平台下载区块 - 网格布局 */
        .x7bg-platform-section {
            padding: 96px 0;
            background: var(--x7bg-white);
        }

        .x7bg-section-title {
            font-size: 32px;
            font-weight: 700;
            text-align: center;
            margin-bottom: 64px;
        }

        .x7bg-grid-platforms {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
            gap: 32px;
            flex-wrap: wrap;
        }

        .x7bg-platform-card {
            background: var(--x7bg-bg-light);
            border-radius: var(--x7bg-radius);
            padding: 48px;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            min-width: 0;
            transition: var(--x7bg-transition);
            border: 1px solid transparent;
        }

        .x7bg-platform-card:hover {
            border-color: var(--x7bg-primary);
            background: var(--x7bg-white);
            box-shadow: 0 20px 40px rgba(255, 102, 0, 0.05);
        }

        .x7bg-platform-img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            border-radius: 12px;
            margin-bottom: 32px;
        }

        .x7bg-platform-info h3 {
            font-size: 24px;
            margin-bottom: 12px;
        }

        .x7bg-platform-info p {
            color: var(--x7bg-text-muted);
            margin-bottom: 24px;
        }

        .x7bg-btn-download {
            display: inline-flex;
            align-items: center;
            background: var(--x7bg-primary);
            color: var(--x7bg-white);
            padding: 12px 32px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: 600;
            transition: var(--x7bg-transition);
        }

        .x7bg-btn-download:hover {
            background: var(--x7bg-primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255, 102, 0, 0.2);
        }

        /* 效率解决方案 - 场景交错布局 */
        .x7bg-scenario-section {
            padding: 96px 0;
        }

        .x7bg-scenario-item {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            margin-bottom: 128px;
        }

        .x7bg-scenario-item:nth-child(even) {
            flex-direction: row-reverse;
        }

        .x7bg-scenario-text {
            flex: 1;
            min-width: 320px;
        }

        .x7bg-scenario-badge {
            display: inline-block;
            background: rgba(255, 102, 0, 0.1);
            color: var(--x7bg-primary);
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .x7bg-scenario-text h2 {
            font-size: 36px;
            margin-bottom: 24px;
            line-height: 1.2;
        }

        .x7bg-tool-list {
            list-style: none;
            margin-bottom: 32px;
        }

        .x7bg-tool-list li {
            margin-bottom: 16px;
            padding-left: 28px;
            position: relative;
        }

        .x7bg-tool-list li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--x7bg-primary);
            font-weight: bold;
        }

        .x7bg-efficiency-tag {
            font-size: 48px;
            font-weight: 800;
            color: var(--x7bg-primary);
            opacity: 0.9;
        }

        .x7bg-efficiency-label {
            font-size: 14px;
            color: var(--x7bg-text-muted);
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        /* 动态内容区块 */
        .x7bg-news-section {
            padding: 64px 0;
            background: #1A1A1B;
            color: var(--x7bg-white);
        }

        .x7bg-news-container {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 32px;
        }

        /* 页脚 */
        .x7bg-footer {
            padding: 80px 0 40px;
            background: var(--x7bg-white);
            border-top: 1px solid rgba(0, 0, 0, 0.05);
        }

        .x7bg-footer-top {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            margin-bottom: 64px;
        }

        .x7bg-footer-brand {
            flex: 1;
            min-width: 240px;
        }

        .x7bg-brand-name {
            font-size: 24px;
            font-weight: 700;
            color: var(--x7bg-text-main);
            margin-bottom: 16px;
        }

        .x7bg-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            flex: 2;
            min-width: 320px;
        }

        .x7bg-link-group h4 {
            font-size: 14px;
            color: var(--x7bg-text-muted);
            margin-bottom: 20px;
        }

        .x7bg-link-group ul {
            list-style: none;
        }

        .x7bg-link-group li {
            margin-bottom: 12px;
        }

        .x7bg-link-group a {
            text-decoration: none;
            color: var(--x7bg-text-main);
            font-size: 14px;
            transition: var(--x7bg-transition);
        }

        .x7bg-link-group a:hover {
            color: var(--x7bg-primary);
        }

        .x7bg-footer-bottom {
            padding-top: 32px;
            border-top: 1px solid rgba(0, 0, 0, 0.05);
            text-align: center;
            font-size: 12px;
            color: var(--x7bg-text-muted);
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .x7bg-scenario-item {
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .x7bg-nav-fixed {
                padding: 8px 16px;
                top: 8px;
            }
            .x7bg-menu {
                display: none; /* 移动端简易化处理，实际应用中可添加汉堡菜单 */
            }
            .x7bg-hero {
                padding-top: 120px;
                padding-bottom: 64px;
            }
            .x7bg-scenario-item, .x7bg-scenario-item:nth-child(even) {
                flex-direction: column;
                margin-bottom: 64px;
            }
            .x7bg-platform-card {
                padding: 32px;
            }
            .x7bg-grid-platforms {
                grid-template-columns: 1fr;
            }
        }