:root {
            --umkciz-primary: #ff6600;
            --umkciz-primary-dark: #e65c00;
            --umkciz-secondary: #2c3e50;
            --umkciz-bg-light: #f8f9fa;
            --umkciz-text-main: #333333;
            --umkciz-text-muted: #666666;
            --umkciz-white: #ffffff;
            --umkciz-accent: #ff9d5c;
            --umkciz-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --umkciz-radius: 16px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            color: var(--umkciz-text-main);
            background-color: var(--umkciz-white);
            line-height: 1.6;
            overflow-x: hidden;
            word-break: break-word;
        }

        /* 导航栏设计 */
        .umkciz-nav-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 rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }

        .umkciz-nav-container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 32px;
            height: 80px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
        }

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

        .umkciz-logo img {
            height: 40px;
            width: auto;
        }

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

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

        .umkciz-menu-item a:hover,
        .umkciz-menu-item.active a {
            color: var(--umkciz-primary);
        }

        /* Hero 独特布局：对角线分割与悬浮中心 */
        .umkciz-hero-section {
            position: relative;
            padding: 160px 32px 96px;
            background: linear-gradient(160deg, #fffcf9 0%, #fff0e6 100%);
            overflow: hidden;
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
        }

        .umkciz-hero-section::before {
            content: "";
            position: absolute;
            top: -10%;
            right: -10%;
            width: 50%;
            height: 80%;
            background: radial-gradient(circle, rgba(255,102,0,0.05) 0%, transparent 70%);
            z-index: 1;
        }

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

        .umkciz-badge {
            display: inline-block;
            background: rgba(255,102,0,0.1);
            color: var(--umkciz-primary);
            padding: 8px 24px;
            border-radius: 100px;
            font-size: 0.9rem;
            font-weight: bold;
            margin-bottom: 24px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .umkciz-hero-title {
            font-size: clamp(2.2rem, 4vw + 1rem, 3.8rem);
            line-height: 1.2;
            font-weight: 800;
            color: var(--umkciz-secondary);
            margin-bottom: 24px;
            word-break: keep-all;
        }

        .umkciz-hero-subtitle {
            font-size: clamp(1rem, 1.2vw + 0.5rem, 1.25rem);
            color: var(--umkciz-text-muted);
            max-width: 700px;
            margin: 0 auto 48px;
            line-height: 1.8;
        }

        .umkciz-download-box {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 24px;
            min-width: 0;
        }

        .umkciz-btn-primary {
            background: linear-gradient(135deg, var(--umkciz-primary) 0%, var(--umkciz-primary-dark) 100%);
            color: white;
            padding: 20px 48px;
            border-radius: 12px;
            font-size: 1.2rem;
            font-weight: bold;
            text-decoration: none;
            box-shadow: 0 15px 35px rgba(255,102,0,0.3);
            transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .umkciz-btn-primary:hover {
            transform: translateY(-5px);
            box-shadow: 0 20px 45px rgba(255,102,0,0.4);
        }

        .umkciz-btn-outline {
            border: 2px solid var(--umkciz-secondary);
            color: var(--umkciz-secondary);
            padding: 20px 48px;
            border-radius: 12px;
            font-size: 1.2rem;
            font-weight: bold;
            text-decoration: none;
            transition: all 0.3s;
        }

        .umkciz-btn-outline:hover {
            background: var(--umkciz-secondary);
            color: white;
        }

        /* 极速特性：卡片式网格 */
        .umkciz-features-section {
            padding: 96px 32px;
            background: var(--umkciz-white);
            max-width: 1300px;
            margin: 0 auto;
        }

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

        .umkciz-section-title {
            font-size: clamp(1.8rem, 3vw + 0.5rem, 2.5rem);
            color: var(--umkciz-secondary);
            margin-bottom: 16px;
        }

        .umkciz-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .umkciz-card {
            background: var(--umkciz-bg-light);
            padding: 48px;
            border-radius: var(--umkciz-radius);
            transition: all 0.4s ease;
            border: 1px solid rgba(0,0,0,0.03);
            min-width: 0;
        }

        .umkciz-card:hover {
            background: var(--umkciz-white);
            transform: translateY(-10px);
            box-shadow: var(--umkciz-shadow);
            border-color: var(--umkciz-primary);
        }

        .umkciz-card-icon {
            width: 64px;
            height: 64px;
            background: var(--umkciz-white);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            color: var(--umkciz-primary);
            margin-bottom: 24px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }

        .umkciz-card-title {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--umkciz-secondary);
        }

        .umkciz-card-text {
            color: var(--umkciz-text-muted);
            font-size: 1rem;
            line-height: 1.7;
        }

        /* 极速体验：对比区块 */
        .umkciz-comparison-section {
            padding: 96px 32px;
            background: var(--umkciz-secondary);
            color: var(--umkciz-white);
        }

        .umkciz-comparison-container {
            max-width: 1100px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
        }

        .umkciz-comparison-text {
            flex: 1;
            min-width: 300px;
        }

        .umkciz-comparison-title {
            font-size: 2.5rem;
            margin-bottom: 24px;
            color: var(--umkciz-primary);
        }

        .umkciz-stats-grid {
            flex: 1;
            min-width: 300px;
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
        }

        .umkciz-stat-item {
            flex: 1;
            min-width: 200px;
            background: rgba(255,255,255,0.05);
            padding: 32px;
            border-radius: var(--umkciz-radius);
            text-align: center;
            border: 1px solid rgba(255,255,255,0.1);
        }

        .umkciz-stat-value {
            font-size: 3rem;
            font-weight: 800;
            color: var(--umkciz-primary);
            display: block;
            margin-bottom: 8px;
        }

        .umkciz-stat-label {
            font-size: 1rem;
            color: rgba(255,255,255,0.7);
        }

        /* 动态内容区块 */
        .umkciz-dynamic-section {
            padding: 96px 32px;
            background: #fff;
            max-width: 1100px;
            margin: 0 auto;
        }

        .umkciz-article-list {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
        }

        .umkciz-article-item {
            flex: 1;
            min-width: 300px;
            border-bottom: 1px solid #eee;
            padding: 24px 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .umkciz-article-tag {
            font-size: 0.8rem;
            color: var(--umkciz-primary);
            font-weight: bold;
        }

        .umkciz-article-title {
            font-size: 1.25rem;
            color: var(--umkciz-secondary);
            text-decoration: none;
            font-weight: bold;
        }

        .umkciz-article-title:hover {
            color: var(--umkciz-primary);
        }

        /* 页脚 */
        .umkciz-footer {
            background: #1a1a1a;
            color: #888;
            padding: 80px 32px 40px;
        }

        .umkciz-footer-container {
            max-width: 1100px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            border-bottom: 1px solid rgba(255,255,255,0.05);
            padding-bottom: 48px;
        }

        .umkciz-footer-brand {
            flex: 1;
            min-width: 280px;
        }

        .umkciz-brand-name {
            color: var(--umkciz-white);
            font-size: 1.5rem;
            font-weight: bold;
            margin-bottom: 16px;
        }

        .umkciz-footer-links {
            flex: 2;
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            min-width: 300px;
        }

        .umkciz-footer-col h4 {
            color: var(--umkciz-white);
            margin-bottom: 24px;
            font-size: 1.1rem;
        }

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

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

        .umkciz-footer-col ul li a {
            color: #888;
            text-decoration: none;
            transition: color 0.3s;
        }

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

        .umkciz-copyright {
            text-align: center;
            padding-top: 40px;
            font-size: 0.9rem;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .umkciz-nav-container {
                height: auto;
                padding: 16px;
            }
            .umkciz-menu {
                display: none; /* 简化移动端，实际项目中需汉堡菜单 */
            }
            .umkciz-hero-section {
                padding-top: 120px;
            }
            .umkciz-download-box {
                flex-direction: column;
            }
            .umkciz-btn-primary, .umkciz-btn-outline {
                width: 100%;
                justify-content: center;
            }
            .umkciz-comparison-container {
                flex-direction: column;
                text-align: center;
            }
        }