:root {
            --i0sbar-primary: #42b983;
            --i0sbar-dark: #2c3e50;
            --i0sbar-light: #f8f9fa;
            --i0sbar-text: #34495e;
            --i0sbar-gray: #7f8c8d;
            --i0sbar-white: #ffffff;
            --i0sbar-accent: #007bff;
            --i0sbar-bg: #fdfdfd;
            --i0sbar-border: #eaedf0;
            --i0sbar-shadow: 0 10px 30px rgba(0,0,0,0.05);
            --i0sbar-radius: 16px;
            --i0sbar-max-width: 1100px;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            -webkit-font-smoothing: antialiased;
        }

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

        /* 导航栏设计 */
        .i0sbar-navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--i0sbar-border);
            z-index: 1000;
            padding: 12px 0;
        }

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

        .i0sbar-logo {
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .i0sbar-logo img {
            height: 36px;
            width: auto;
        }

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

        .i0sbar-nav-item a {
            text-decoration: none;
            color: var(--i0sbar-gray);
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s ease;
            white-space: nowrap;
        }

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

        .i0sbar-nav-item.active a {
            color: var(--i0sbar-primary);
            font-weight: 700;
        }

        /* Hero 区块 - 独特非对称布局 */
        .i0sbar-hero {
            padding: 160px 0 80px;
            background: linear-gradient(135deg, #ffffff 0%, #f1f8f5 100%);
            position: relative;
        }

        .i0sbar-hero-content {
            max-width: var(--i0sbar-max-width);
            margin: 0 auto;
            padding: 0 24px;
            text-align: center;
        }

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

        .i0sbar-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--i0sbar-gray);
            max-width: 800px;
            margin: 0 auto 48px;
            word-break: break-word;
        }

        /* 下载版本网格 */
        .i0sbar-download-section {
            padding: 80px 0;
            max-width: var(--i0sbar-max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .i0sbar-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
            margin-top: -40px;
        }

        .i0sbar-card {
            background: var(--i0sbar-white);
            border-radius: var(--i0sbar-radius);
            overflow: hidden;
            box-shadow: var(--i0sbar-shadow);
            transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            border: 1px solid var(--i0sbar-border);
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .i0sbar-card:hover {
            transform: translateY(-12px);
        }

        .i0sbar-card-img {
            width: 100%;
            height: 220px;
            object-fit: cover;
            border-bottom: 1px solid var(--i0sbar-border);
        }

        .i0sbar-card-body {
            padding: 32px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }

        .i0sbar-os-tag {
            background: rgba(66, 185, 131, 0.1);
            color: var(--i0sbar-primary);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 700;
            margin-bottom: 16px;
            text-transform: uppercase;
        }

        .i0sbar-card-title {
            font-size: 1.5rem;
            margin-bottom: 12px;
            color: var(--i0sbar-dark);
        }

        .i0sbar-card-desc {
            font-size: 0.95rem;
            color: var(--i0sbar-gray);
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .i0sbar-btn {
            display: inline-block;
            padding: 12px 32px;
            background: var(--i0sbar-dark);
            color: var(--i0sbar-white);
            text-decoration: none;
            border-radius: 8px;
            font-weight: 600;
            transition: all 0.3s ease;
            width: 100%;
            text-align: center;
        }

        .i0sbar-btn:hover {
            background: var(--i0sbar-primary);
            box-shadow: 0 8px 20px rgba(66, 185, 131, 0.3);
        }

        .i0sbar-btn-secondary {
            background: transparent;
            border: 1px solid var(--i0sbar-border);
            color: var(--i0sbar-dark);
            margin-top: 12px;
        }

        /* 场景区块 */
        .i0sbar-workflow-section {
            padding: 96px 0;
            background-color: #fcfcfc;
        }

        .i0sbar-section-header {
            max-width: var(--i0sbar-max-width);
            margin: 0 auto 64px;
            padding: 0 24px;
            text-align: center;
        }

        .i0sbar-workflow-grid {
            max-width: var(--i0sbar-max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .i0sbar-workflow-card {
            padding: 40px;
            background: var(--i0sbar-white);
            border-radius: var(--i0sbar-radius);
            border-left: 4px solid var(--i0sbar-primary);
            box-shadow: 0 4px 12px rgba(0,0,0,0.03);
            min-width: 0;
        }

        .i0sbar-persona {
            font-weight: 800;
            color: var(--i0sbar-dark);
            margin-bottom: 12px;
            display: block;
            font-size: 1.1rem;
        }

        .i0sbar-scenario {
            color: var(--i0sbar-gray);
            font-size: 0.95rem;
        }

        /* 动态资讯区块 */
        .i0sbar-news-section {
            padding: 96px 0;
            max-width: var(--i0sbar-max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 页脚 */
        .i0sbar-footer {
            background: var(--i0sbar-dark);
            color: #bdc3c7;
            padding: 80px 0 40px;
            margin-top: 80px;
        }

        .i0sbar-footer-container {
            max-width: var(--i0sbar-max-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
        }

        .i0sbar-footer-brand {
            flex: 1;
            min-width: 250px;
        }

        .i0sbar-footer-brand-name {
            font-size: 24px;
            font-weight: 800;
            color: var(--i0sbar-white);
            margin-bottom: 16px;
        }

        .i0sbar-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            flex: 2;
            min-width: 0;
        }

        .i0sbar-footer-group h4 {
            color: var(--i0sbar-white);
            margin-bottom: 20px;
            font-size: 16px;
        }

        .i0sbar-footer-group ul {
            list-style: none;
        }

        .i0sbar-footer-group ul li {
            margin-bottom: 10px;
        }

        .i0sbar-footer-group ul li a {
            color: #bdc3c7;
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s;
        }

        .i0sbar-footer-group ul li a:hover {
            color: var(--i0sbar-primary);
        }

        .i0sbar-copyright {
            max-width: var(--i0sbar-max-width);
            margin: 60px auto 0;
            padding: 24px;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
            font-size: 13px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .i0sbar-nav-menu {
                display: none; /* 简化移动端，实际开发中需汉堡菜单 */
            }
            .i0sbar-hero {
                padding: 120px 0 60px;
            }
            .i0sbar-hero-title {
                font-size: 2rem;
            }
            .i0sbar-grid {
                grid-template-columns: 1fr;
            }
        }