:root {
            --umkciz-primary: #EE4134;
            --umkciz-primary-hover: #D6362B;
            --umkciz-accent: #4A90E2;
            --umkciz-text-dark: #1D1D1F;
            --umkciz-text-gray: #86868B;
            --umkciz-bg-light: #FBFBFD;
            --umkciz-glass: rgba(255, 255, 255, 0.8);
            --umkciz-spacing-unit: 8px;
            --umkciz-container-width: 1320px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--umkciz-bg-light);
            color: var(--umkciz-text-dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 布局基础 */
        .umkciz-container {
            max-width: var(--umkciz-container-width);
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        .umkciz-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .umkciz-flex-item {
            min-width: 0;
        }

        /* 导航栏 */
        .umkciz-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: var(--umkciz-glass);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }

        .umkciz-nav-inner {
            height: 64px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

        .umkciz-logo {
            height: 32px;
            display: flex;
            align-items: center;
        }

        .umkciz-logo img {
            height: 100%;
            width: auto;
        }

        .umkciz-nav-list {
            display: flex;
            list-style: none;
            flex-wrap: wrap;
        }

        .umkciz-nav-item a {
            text-decoration: none;
            color: var(--umkciz-text-dark);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 16px;
            transition: color 0.3s ease;
            word-break: keep-all;
        }

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

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

        /* Hero 区 - 独特布局 */
        .umkciz-hero {
            padding-top: 160px;
            padding-bottom: 96px;
            background: radial-gradient(circle at 80% 20%, rgba(238, 65, 52, 0.05) 0%, transparent 40%),
                        radial-gradient(circle at 10% 80%, rgba(74, 144, 226, 0.05) 0%, transparent 40%);
            position: relative;
            overflow: hidden;
        }

        .umkciz-hero-content {
            text-align: center;
            max-width: 900px;
            margin: 0 auto;
            position: relative;
            z-index: 2;
        }

        .umkciz-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            letter-spacing: -0.02em;
            word-break: keep-all;
        }

        .umkciz-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.5rem);
            color: var(--umkciz-text-gray);
            margin-bottom: 48px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
            word-break: break-word;
        }

        .umkciz-download-box {
            background: #fff;
            padding: 40px;
            border-radius: 24px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.06);
            display: inline-block;
            width: 100%;
            max-width: 500px;
            transition: transform 0.3s ease;
        }

        .umkciz-download-box:hover {
            transform: translateY(-5px);
        }

        .umkciz-btn-main {
            display: block;
            background: var(--umkciz-primary);
            color: #fff;
            text-decoration: none;
            padding: 18px 48px;
            border-radius: 12px;
            font-size: 18px;
            font-weight: 600;
            transition: all 0.3s ease;
            margin-bottom: 16px;
            border: none;
            cursor: pointer;
        }

        .umkciz-btn-main:hover {
            background: var(--umkciz-primary-hover);
            box-shadow: 0 8px 24px rgba(238, 65, 52, 0.3);
        }

        .umkciz-version-info {
            font-size: 13px;
            color: var(--umkciz-text-gray);
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* 功能网格 */
        .umkciz-section {
            padding: 96px 0;
        }

        .umkciz-section-head {
            text-align: center;
            margin-bottom: 64px;
        }

        .umkciz-section-title {
            font-size: clamp(2rem, 3vw + 0.5rem, 2.8rem);
            margin-bottom: 16px;
        }

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

        .umkciz-card {
            background: #fff;
            padding: 48px;
            border-radius: 24px;
            transition: all 0.3s ease;
            border: 1px solid rgba(0,0,0,0.03);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .umkciz-card:hover {
            box-shadow: 0 24px 48px rgba(0,0,0,0.08);
            border-color: transparent;
        }

        .umkciz-card-icon {
            width: 56px;
            height: 56px;
            background: rgba(238, 65, 52, 0.1);
            border-radius: 14px;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--umkciz-primary);
            font-size: 24px;
            font-weight: bold;
        }

        .umkciz-card h3 {
            font-size: 22px;
            margin-bottom: 16px;
            word-break: keep-all;
        }

        .umkciz-card p {
            color: var(--umkciz-text-gray);
            font-size: 16px;
            line-height: 1.7;
        }

        /* 交互对比区 */
        .umkciz-feature-highlight {
            background: #000;
            color: #fff;
            border-radius: 32px;
            padding: 80px 48px;
            overflow: hidden;
            position: relative;
        }

        .umkciz-highlight-text {
            flex: 1;
            min-width: 300px;
            padding-right: 48px;
        }

        .umkciz-highlight-visual {
            flex: 1;
            min-width: 300px;
            background: linear-gradient(135deg, #333, #111);
            border-radius: 20px;
            height: 300px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255,255,255,0.1);
        }

        .umkciz-typing-demo {
            font-family: monospace;
            font-size: 1.5rem;
            border-right: 2px solid var(--umkciz-primary);
            padding-right: 4px;
            animation: umkciz-cursor 1s infinite step-end;
        }

        @keyframes umkciz-cursor {
            from, to { border-color: transparent; }
            50% { border-color: var(--umkciz-primary); }
        }

        /* 动态内容区块 */
        .umkciz-news-section {
            background: #fff;
        }

        .umkciz-news-item {
            padding: 24px 0;
            border-bottom: 1px solid #f0f0f0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: padding-left 0.3s ease;
        }

        .umkciz-news-item:hover {
            padding-left: 12px;
            color: var(--umkciz-primary);
        }

        .umkciz-news-item span {
            color: var(--umkciz-text-gray);
            font-size: 14px;
        }

        /* 页脚 */
        .umkciz-footer {
            background: #F5F5F7;
            padding: 80px 0 48px;
            color: var(--umkciz-text-gray);
            font-size: 14px;
        }

        .umkciz-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .umkciz-footer-brand h2 {
            color: var(--umkciz-text-dark);
            margin-bottom: 16px;
            font-size: 20px;
        }

        .umkciz-footer-links h4 {
            color: var(--umkciz-text-dark);
            margin-bottom: 20px;
        }

        .umkciz-footer-links ul {
            list-style: none;
        }

        .umkciz-footer-links li {
            margin-bottom: 12px;
        }

        .umkciz-footer-links a {
            text-decoration: none;
            color: inherit;
            transition: color 0.3s ease;
        }

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

        .umkciz-copyright {
            padding-top: 32px;
            border-top: 1px solid rgba(0,0,0,0.05);
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .umkciz-nav-list {
                display: none; /* 简化移动端，实际可做汉堡菜单 */
            }
            .umkciz-hero {
                padding-top: 120px;
            }
            .umkciz-highlight-text {
                padding-right: 0;
                margin-bottom: 32px;
            }
            .umkciz-section {
                padding: 64px 0;
            }
        }