:root {
            --i0sbar-primary: #42a5f5;
            --i0sbar-dark: #2c3e50;
            --i0sbar-text: #34495e;
            --i0sbar-light: #f8f9fa;
            --i0sbar-border: #e0e0e0;
            --i0sbar-bg: #ffffff;
            --i0sbar-spacing-unit: 8px;
            --i0sbar-container-width: 1100px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.7;
            color: var(--i0sbar-text);
            background-color: var(--i0sbar-bg);
            word-break: break-word;
            overflow-x: hidden;
        }

        /* 导航栏样式 */
        .i0sbar-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--i0sbar-border);
            transition: all 0.3s ease;
        }

        .i0sbar-navbar {
            max-width: var(--i0sbar-container-width);
            margin: 0 auto;
            padding: 0 24px;
            height: 72px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }

        .i0sbar-logo {
            flex-shrink: 0;
            min-width: 0;
        }

        .i0sbar-logo img {
            height: 32px;
            width: auto;
            display: block;
        }

        .i0sbar-nav-menu {
            display: flex;
            list-style: none;
            gap: 16px;
            flex-wrap: wrap;
            min-width: 0;
        }

        .i0sbar-nav-item a {
            text-decoration: none;
            color: var(--i0sbar-text);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 4px;
            transition: color 0.2s;
            white-space: nowrap;
        }

        .i0sbar-nav-item a:hover {
            color: var(--i0sbar-primary);
        }

        .i0sbar-nav-item a.i0sbar-active {
            color: var(--i0sbar-primary);
            border-bottom: 2px solid var(--i0sbar-primary);
        }

        /* Hero 区块 - 独特居中设计 */
        .i0sbar-hero {
            padding: 160px 24px 80px;
            background: radial-gradient(circle at top right, #f0f7ff 0%, #ffffff 100%);
            text-align: center;
            overflow: hidden;
        }

        .i0sbar-hero-content {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }

        .i0sbar-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            font-weight: 800;
            color: var(--i0sbar-dark);
            line-height: 1.2;
            margin-bottom: 24px;
            word-break: keep-all;
        }

        .i0sbar-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: #666;
            margin-bottom: 40px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        /* 模拟 PDF 导出预览卡片 */
        .i0sbar-preview-box {
            margin-top: 48px;
            position: relative;
            perspective: 1000px;
        }

        .i0sbar-pdf-card {
            background: #fff;
            border-radius: 12px;
            box-shadow: 0 30px 60px rgba(0,0,0,0.12);
            padding: 40px;
            max-width: 500px;
            margin: 0 auto;
            transform: rotateX(10deg);
            border: 1px solid var(--i0sbar-border);
            text-align: left;
            transition: transform 0.5s ease;
        }

        .i0sbar-pdf-card:hover {
            transform: rotateX(0deg) translateY(-10px);
        }

        .i0sbar-pdf-line {
            height: 10px;
            background: #f0f0f0;
            margin-bottom: 12px;
            border-radius: 4px;
        }

        .i0sbar-pdf-line.short { width: 60%; }
        .i0sbar-pdf-line.mid { width: 85%; }

        /* 特性网格 */
        .i0sbar-section {
            padding: 96px 24px;
            max-width: var(--i0sbar-container-width);
            margin: 0 auto;
        }

        .i0sbar-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            flex-wrap: wrap;
        }

        .i0sbar-card {
            background: var(--i0sbar-light);
            padding: 40px;
            border-radius: 16px;
            transition: all 0.3s ease;
            min-width: 0;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .i0sbar-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.05);
            background: #fff;
        }

        .i0sbar-card-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--i0sbar-dark);
        }

        /* 工作流场景 - 独特交错布局 */
        .i0sbar-workflow {
            background-color: var(--i0sbar-dark);
            color: #fff;
            padding: 96px 24px;
        }

        .i0sbar-workflow-container {
            max-width: var(--i0sbar-container-width);
            margin: 0 auto;
        }

        .i0sbar-workflow-item {
            display: flex;
            align-items: center;
            margin-bottom: 64px;
            gap: 48px;
            flex-wrap: wrap;
        }

        .i0sbar-workflow-item:nth-child(even) {
            flex-direction: row-reverse;
        }

        .i0sbar-workflow-text {
            flex: 1;
            min-width: 300px;
        }

        .i0sbar-workflow-persona {
            color: var(--i0sbar-primary);
            font-weight: bold;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 16px;
            display: block;
        }

        .i0sbar-workflow-title {
            font-size: 28px;
            margin-bottom: 24px;
        }

        .i0sbar-workflow-visual {
            flex: 1;
            min-width: 300px;
            background: rgba(255,255,255,0.05);
            height: 200px;
            border-radius: 12px;
            border: 1px dashed rgba(255,255,255,0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-style: italic;
            color: rgba(255,255,255,0.4);
        }

        /* 动态内容标记 */
        .i0sbar-updates {
            border-top: 1px solid var(--i0sbar-border);
        }

        /* 页脚 */
        .i0sbar-footer {
            background: #f8f9fa;
            padding: 64px 24px;
            border-top: 1px solid var(--i0sbar-border);
        }

        .i0sbar-footer-content {
            max-width: var(--i0sbar-container-width);
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 24px;
        }

        .i0sbar-brand-text {
            font-size: 24px;
            font-weight: 800;
            color: var(--i0sbar-dark);
        }

        .i0sbar-copyright {
            font-size: 14px;
            color: #999;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .i0sbar-navbar {
                height: auto;
                padding: 16px;
            }
            .i0sbar-nav-menu {
                margin-top: 16px;
                justify-content: center;
            }
            .i0sbar-hero {
                padding-top: 120px;
            }
            .i0sbar-workflow-item {
                text-align: center;
            }
        }