:root {
            --umkciz-primary: #FF6600;
            --umkciz-primary-hover: #e65c00;
            --umkciz-dark: #1d1d1f;
            --umkciz-light: #f5f5f7;
            --umkciz-gray: #86868b;
            --umkciz-border: #d2d2d7;
            --umkciz-bg-gradient: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
            --umkciz-container-width: 1300px;
        }

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

        body {
            font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
            background: var(--umkciz-bg-gradient);
            color: var(--umkciz-dark);
            line-height: 1.6;
            word-break: break-word;
            overflow-wrap: break-word;
        }

        /* 导航栏 */
        .umkciz-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.8);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--umkciz-border);
        }

        .umkciz-nav-container {
            max-width: var(--umkciz-container-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            height: 64px;
        }

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

        .umkciz-logo img {
            height: 32px;
            display: block;
        }

        .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-dark);
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s;
            white-space: nowrap;
        }

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

        .umkciz-menu-item a.active {
            color: var(--umkciz-primary);
            border-bottom: 2px solid var(--umkciz-primary);
            padding-bottom: 4px;
        }

        /* Hero 区 */
        .umkciz-hero {
            padding: 96px 24px;
            text-align: center;
            background: radial-gradient(circle at center, #ffffff 0%, #f0f0f0 100%);
            border-bottom: 1px solid var(--umkciz-border);
        }

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

        .umkciz-hero-title {
            font-size: clamp(2rem, 5vw + 1rem, 4rem);
            font-weight: 700;
            line-height: 1.1;
            margin-bottom: 24px;
            color: var(--umkciz-dark);
            letter-spacing: -0.02em;
        }

        .umkciz-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.5rem);
            color: var(--umkciz-gray);
            margin-bottom: 48px;
        }

        /* 快捷键分类网格 */
        .umkciz-section {
            padding: 80px 24px;
            max-width: var(--umkciz-container-width);
            margin: 0 auto;
        }

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

        .umkciz-card {
            background: #ffffff;
            border-radius: 20px;
            padding: 40px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            min-width: 0;
            border: 1px solid rgba(0,0,0,0.03);
        }

        .umkciz-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 40px rgba(0,0,0,0.1);
        }

        .umkciz-card-icon {
            width: 56px;
            height: 56px;
            background: var(--umkciz-primary);
            color: white;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 24px;
            font-size: 24px;
            font-weight: bold;
        }

        .umkciz-card-title {
            font-size: 24px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .umkciz-shortcut-list {
            list-style: none;
        }

        .umkciz-shortcut-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px solid var(--umkciz-border);
        }

        .umkciz-shortcut-item:last-child {
            border-bottom: none;
        }

        .umkciz-key-label {
            color: var(--umkciz-gray);
            font-size: 15px;
        }

        .umkciz-key-combo {
            display: flex;
            gap: 4px;
        }

        .umkciz-kbd {
            background: #f0f0f2;
            border: 1px solid #d1d1d6;
            border-radius: 6px;
            padding: 2px 8px;
            font-family: monospace;
            font-size: 13px;
            box-shadow: 0 2px 0 #d1d1d6;
            color: #333;
        }

        /* 交互说明区 - 左右混排 */
        .umkciz-feature-row {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
            margin-bottom: 96px;
        }

        .umkciz-feature-row.reverse {
            flex-direction: row-reverse;
        }

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

        .umkciz-feature-visual {
            flex: 1;
            min-width: 300px;
            background: #fff;
            padding: 40px;
            border-radius: 24px;
            border: 1px solid var(--umkciz-border);
            text-align: center;
        }

        .umkciz-step-number {
            font-size: 14px;
            color: var(--umkciz-primary);
            font-weight: 700;
            text-transform: uppercase;
            margin-bottom: 8px;
            display: block;
        }

        .umkciz-feature-title {
            font-size: 32px;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .umkciz-feature-text {
            color: var(--umkciz-gray);
            font-size: 18px;
            margin-bottom: 32px;
        }

        /* 提示区块 */
        .umkciz-tip-box {
            background: #fff8f0;
            border-left: 4px solid var(--umkciz-primary);
            padding: 24px;
            border-radius: 0 12px 12px 0;
            margin-top: 32px;
        }

        /* 动态资讯区块标记 */
        .umkciz-dynamic-section {
            background: var(--umkciz-dark);
            color: white;
            padding: 80px 24px;
            border-radius: 40px;
            margin: 40px 24px;
        }

        .umkciz-dynamic-title {
            text-align: center;
            font-size: 32px;
            margin-bottom: 48px;
        }

        /* 页脚 */
        .umkciz-footer {
            background: #fff;
            padding: 64px 24px;
            border-top: 1px solid var(--umkciz-border);
            margin-top: 80px;
        }

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

        .umkciz-footer-brand {
            font-size: 24px;
            font-weight: 700;
            color: var(--umkciz-dark);
            margin-bottom: 16px;
        }

        .umkciz-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
        }

        .umkciz-footer-group h4 {
            font-size: 14px;
            color: var(--umkciz-gray);
            margin-bottom: 16px;
        }

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

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

        .umkciz-footer-group ul li a {
            text-decoration: none;
            color: var(--umkciz-dark);
            font-size: 14px;
        }

        .umkciz-copyright {
            max-width: var(--umkciz-container-width);
            margin: 48px auto 0;
            padding-top: 24px;
            border-top: 1px solid var(--umkciz-border);
            color: var(--umkciz-gray);
            font-size: 12px;
            text-align: center;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .umkciz-nav-container {
                height: auto;
                padding: 16px;
            }
            .umkciz-menu {
                gap: 12px;
                margin-top: 16px;
                justify-content: center;
                width: 100%;
            }
            .umkciz-hero {
                padding: 64px 24px;
            }
            .umkciz-feature-row, .umkciz-feature-row.reverse {
                flex-direction: column;
                gap: 32px;
            }
        }