:root {
            --x7bg-primary: #FF6A00;
            --x7bg-primary-grad: linear-gradient(135deg, #FF8E3C 0%, #FF6A00 100%);
            --x7bg-secondary: #EE1111;
            --x7bg-dark: #2D2D2D;
            --x7bg-light: #F5F7FA;
            --x7bg-white: #FFFFFF;
            --x7bg-text: #333333;
            --x7bg-text-light: #666666;
            --x7bg-shadow: 0 10px 30px rgba(255, 106, 0, 0.1);
            --x7bg-radius: 16px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--x7bg-text);
            background-color: var(--x7bg-light);
            line-height: 1.7;
            overflow-x: hidden;
        }

        /* 导航栏 */
        .x7bg-header {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(15px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
        }

        .x7bg-nav-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 16px 24px;
        }

        .x7bg-logo {
            min-width: 0;
            flex: 0 0 auto;
        }

        .x7bg-logo img {
            height: 40px;
            display: block;
        }

        .x7bg-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 24px;
            min-width: 0;
        }

        .x7bg-menu a {
            text-decoration: none;
            color: var(--x7bg-text);
            font-weight: 500;
            font-size: 1rem;
            transition: color 0.3s;
            white-space: nowrap;
        }

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

        /* Hero 区块 - 独特堆叠布局 */
        .x7bg-hero {
            padding: 160px 24px 80px;
            background: radial-gradient(circle at top right, rgba(255, 106, 0, 0.05), transparent),
                        radial-gradient(circle at bottom left, rgba(238, 17, 17, 0.03), transparent);
            text-align: center;
            position: relative;
        }

        .x7bg-hero-inner {
            max-width: 1100px;
            margin: 0 auto;
        }

        .x7bg-hero-title {
            font-size: clamp(2rem, 5vw + 1rem, 4rem);
            font-weight: 800;
            background: linear-gradient(to right, var(--x7bg-dark), var(--x7bg-primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 24px;
            word-break: keep-all;
            line-height: 1.2;
        }

        .x7bg-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.5rem);
            color: var(--x7bg-text-light);
            max-width: 800px;
            margin: 0 auto 48px;
            word-break: break-word;
        }

        /* 效率矩阵区块 */
        .x7bg-efficiency-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            max-width: 1400px;
            margin: -40px auto 80px;
            padding: 0 24px;
        }

        .x7bg-eff-card {
            background: var(--x7bg-white);
            padding: 40px;
            border-radius: var(--x7bg-radius);
            box-shadow: var(--x7bg-shadow);
            transition: transform 0.3s ease;
            min-width: 0;
            display: flex;
            flex-direction: column;
            border: 1px solid rgba(255, 106, 0, 0.05);
        }

        .x7bg-eff-card:hover {
            transform: translateY(-8px);
        }

        .x7bg-eff-tag {
            display: inline-block;
            background: rgba(255, 106, 0, 0.1);
            color: var(--x7bg-primary);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: bold;
            margin-bottom: 16px;
            align-self: flex-start;
        }

        .x7bg-eff-title {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--x7bg-dark);
        }

        .x7bg-eff-list {
            list-style: none;
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .x7bg-eff-list li {
            padding: 8px 0;
            border-bottom: 1px dashed rgba(0,0,0,0.05);
            color: var(--x7bg-text-light);
            font-size: 0.95rem;
        }

        .x7bg-eff-boost {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--x7bg-secondary);
            display: flex;
            align-items: baseline;
            gap: 4px;
        }

        .x7bg-eff-boost span {
            font-size: 1rem;
            color: var(--x7bg-text-light);
        }

        /* 核心教程步骤 - 图文交替布局 */
        .x7bg-tutorial-section {
            max-width: 1200px;
            margin: 0 auto 96px;
            padding: 0 24px;
        }

        .x7bg-step-item {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            margin-bottom: 80px;
        }

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

        .x7bg-step-content {
            flex: 1;
            min-width: 300px;
        }

        .x7bg-step-visual {
            flex: 1;
            min-width: 300px;
            background: var(--x7bg-white);
            border-radius: var(--x7bg-radius);
            padding: 40px;
            box-shadow: var(--x7bg-shadow);
            border: 1px solid rgba(0,0,0,0.03);
        }

        .x7bg-step-num {
            font-size: 4rem;
            font-weight: 900;
            color: rgba(255, 106, 0, 0.1);
            line-height: 1;
            margin-bottom: -20px;
        }

        .x7bg-step-title {
            font-size: 2rem;
            margin-bottom: 24px;
            position: relative;
            z-index: 1;
        }

        .x7bg-shortcut-box {
            background: #2D2D2D;
            color: #FFF;
            padding: 24px;
            border-radius: 12px;
            font-family: monospace;
            margin-top: 24px;
        }

        .x7bg-key {
            display: inline-block;
            background: #444;
            padding: 4px 12px;
            border-radius: 6px;
            border-bottom: 3px solid #000;
            margin: 0 4px;
            color: var(--x7bg-primary);
        }

        /* 动态区块 */
        .x7bg-dynamic-section {
            background: var(--x7bg-dark);
            color: var(--x7bg-white);
            padding: 80px 24px;
            margin-bottom: 80px;
        }

        .x7bg-dynamic-container {
            max-width: 1100px;
            margin: 0 auto;
        }

        .x7bg-section-head {
            text-align: center;
            margin-bottom: 48px;
        }

        .x7bg-section-head h2 {
            font-size: 2.5rem;
            margin-bottom: 16px;
        }

        .x7bg-news-list {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
        }

        .x7bg-news-item {
            flex: 1;
            min-width: 280px;
            background: rgba(255,255,255,0.05);
            padding: 24px;
            border-radius: 12px;
            border-left: 4px solid var(--x7bg-primary);
            transition: background 0.3s;
        }

        .x7bg-news-item:hover {
            background: rgba(255,255,255,0.1);
        }

        /* 页脚 */
        .x7bg-footer {
            background: #F0F2F5;
            padding: 64px 24px;
            border-top: 1px solid rgba(0,0,0,0.05);
        }

        .x7bg-footer-inner {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
        }

        .x7bg-footer-brand {
            flex: 0 0 300px;
            min-width: 0;
        }

        .x7bg-footer-brand h3 {
            font-size: 1.5rem;
            color: var(--x7bg-primary);
            margin-bottom: 16px;
        }

        .x7bg-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            flex: 1;
            min-width: 0;
        }

        .x7bg-footer-group h4 {
            margin-bottom: 20px;
            font-size: 1.1rem;
        }

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

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

        .x7bg-footer-group a {
            text-decoration: none;
            color: var(--x7bg-text-light);
            transition: color 0.3s;
        }

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

        .x7bg-copyright {
            width: 100%;
            text-align: center;
            margin-top: 64px;
            padding-top: 24px;
            border-top: 1px solid rgba(0,0,0,0.05);
            color: var(--x7bg-text-light);
            font-size: 0.9rem;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .x7bg-nav-container {
                padding: 12px 16px;
            }
            .x7bg-menu {
                display: none; /* 简化移动端，实际可加汉堡菜单 */
            }
            .x7bg-step-item, .x7bg-step-item:nth-child(even) {
                flex-direction: column;
                gap: 32px;
            }
            .x7bg-hero {
                padding: 120px 16px 60px;
            }
            .x7bg-efficiency-grid {
                margin-top: 24px;
            }
        }