:root {
            --umkciz-primary: #ff6600;
            --umkciz-primary-light: #ff8533;
            --umkciz-accent: #4a90e2;
            --umkciz-bg-dark: #0f172a;
            --umkciz-text-main: #1e293b;
            --umkciz-text-muted: #64748b;
            --umkciz-white: #ffffff;
            --umkciz-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --umkciz-radius: 16px;
            --umkciz-container: 1100px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
            background-color: #f8fafc;
            color: var(--umkciz-text-main);
            line-height: 1.7;
            overflow-x: hidden;
        }

        /* 导航栏 */
        .umkciz-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }

        .umkciz-nav-container {
            max-width: var(--umkciz-container);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }

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

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

        .umkciz-nav-list {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 20px;
            min-width: 0;
        }

        .umkciz-nav-item a {
            text-decoration: none;
            color: var(--umkciz-text-main);
            font-weight: 500;
            font-size: 15px;
            padding: 8px 12px;
            border-radius: 8px;
            transition: all 0.2s ease;
            word-break: keep-all;
        }

        .umkciz-nav-item a:hover {
            color: var(--umkciz-primary);
            background: rgba(255, 102, 0, 0.05);
        }

        .umkciz-nav-item.active a {
            color: var(--umkciz-white);
            background: var(--umkciz-primary);
        }

        /* Hero 区块 */
        .umkciz-hero {
            padding: 160px 24px 80px;
            background: radial-gradient(circle at 80% 20%, rgba(255, 102, 0, 0.05) 0%, transparent 40%),
                        radial-gradient(circle at 20% 80%, rgba(74, 144, 226, 0.05) 0%, transparent 40%);
            text-align: center;
            position: relative;
        }

        .umkciz-hero-content {
            max-width: 800px;
            margin: 0 auto;
        }

        .umkciz-hero-title {
            font-size: clamp(2.2rem, 4vw + 1rem, 3.5rem);
            font-weight: 800;
            line-height: 1.2;
            color: #0f172a;
            margin-bottom: 24px;
            word-break: keep-all;
        }

        .umkciz-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--umkciz-text-muted);
            margin-bottom: 48px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }

        .umkciz-btn-group {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
            min-width: 0;
        }

        .umkciz-btn {
            display: inline-block;
            padding: 16px 40px;
            border-radius: 50px;
            font-weight: 600;
            text-decoration: none;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
            cursor: pointer;
        }

        .umkciz-btn-primary {
            background: linear-gradient(135deg, var(--umkciz-primary), #ff8c00);
            color: white;
            box-shadow: 0 10px 20px rgba(255, 102, 0, 0.2);
        }

        .umkciz-btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 15px 30px rgba(255, 102, 0, 0.3);
        }

        /* 核心功能卡片 */
        .umkciz-features {
            padding: 80px 24px;
            max-width: var(--umkciz-container);
            margin: 0 auto;
        }

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

        .umkciz-section-title h2 {
            font-size: clamp(1.8rem, 3vw + 0.5rem, 2.5rem);
            color: var(--umkciz-bg-dark);
            margin-bottom: 16px;
        }

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

        .umkciz-card {
            background: var(--umkciz-white);
            padding: 40px;
            border-radius: var(--umkciz-radius);
            box-shadow: var(--umkciz-shadow);
            transition: all 0.3s ease;
            border: 1px solid rgba(0,0,0,0.02);
            min-width: 0;
        }

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

        .umkciz-card-icon {
            width: 64px;
            height: 64px;
            background: rgba(255, 102, 0, 0.1);
            border-radius: 12px;
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: var(--umkciz-primary);
        }

        .umkciz-card h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--umkciz-bg-dark);
        }

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

        /* 交互展示区 */
        .umkciz-interaction {
            background-color: var(--umkciz-bg-dark);
            color: white;
            padding: 96px 24px;
            border-radius: 40px;
            margin: 40px 24px;
            overflow: hidden;
        }

        .umkciz-flex-row {
            max-width: var(--umkciz-container);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
        }

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

        .umkciz-tag {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(255, 102, 0, 0.2);
            color: var(--umkciz-primary-light);
            border-radius: 20px;
            font-size: 0.875rem;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .umkciz-display-box {
            background: rgba(255,255,255,0.05);
            border: 1px solid rgba(255,255,255,0.1);
            border-radius: 24px;
            padding: 32px;
            position: relative;
        }

        .umkciz-input-mock {
            background: rgba(0,0,0,0.3);
            border-radius: 12px;
            padding: 16px;
            margin-top: 16px;
            border-left: 4px solid var(--umkciz-primary);
        }

        /* 动态资讯区 */
        .umkciz-dynamic-section {
            padding: 80px 24px;
            max-width: var(--umkciz-container);
            margin: 0 auto;
        }

        /* 页脚 */
        .umkciz-footer {
            background: #f1f5f9;
            padding: 80px 24px 40px;
            border-top: 1px solid #e2e8f0;
        }

        .umkciz-footer-grid {
            max-width: var(--umkciz-container);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            margin-bottom: 64px;
        }

        .umkciz-footer-brand {
            flex: 1;
            min-width: 240px;
        }

        .umkciz-brand-text {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--umkciz-primary);
            margin-bottom: 16px;
        }

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

        .umkciz-footer-col h4 {
            margin-bottom: 24px;
            font-size: 1rem;
            color: var(--umkciz-bg-dark);
        }

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

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

        .umkciz-footer-col a {
            text-decoration: none;
            color: var(--umkciz-text-muted);
            font-size: 0.9rem;
            transition: color 0.2s ease;
        }

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

        .umkciz-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid #e2e8f0;
            color: var(--umkciz-text-muted);
            font-size: 0.875rem;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .umkciz-nav-list {
                display: none; /* 简化演示，移动端可隐藏或改为汉堡菜单 */
            }
            .umkciz-hero {
                padding-top: 120px;
            }
            .umkciz-flex-row {
                flex-direction: column;
            }
            .umkciz-interaction {
                margin: 20px 10px;
                border-radius: 20px;
            }
            .umkciz-card {
                padding: 24px;
            }
        }