:root {
            --px5cu-primary: #bf0000;
            --px5cu-secondary: #2c3e50;
            --px5cu-bg-light: #f8f9fa;
            --px5cu-text-dark: #1a1a1a;
            --px5cu-text-muted: #666;
            --px5cu-accent: #e74c3c;
            --px5cu-glass: rgba(255, 255, 255, 0.95);
            --px5cu-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --px5cu-radius: 12px;
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            color: var(--px5cu-text-dark);
            background-color: #ffffff;
            word-break: keep-all;
            overflow-x: hidden;
        }

        /* 导航栏设计 */
        .px5cu-navbar {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: var(--px5cu-glass);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            box-shadow: 0 2px 10px rgba(0,0,0,0.02);
        }

        .px5cu-nav-container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
            flex-wrap: wrap;
        }

        .px5cu-logo {
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .px5cu-logo img {
            height: 40px;
            width: auto;
        }

        .px5cu-nav-menu {
            display: flex;
            list-style: none;
            gap: 16px;
            flex-wrap: wrap;
            min-width: 0;
        }

        .px5cu-nav-menu li a {
            text-decoration: none;
            color: var(--px5cu-text-dark);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 12px;
            transition: all 0.3s ease;
            border-radius: 6px;
        }

        .px5cu-nav-menu li a:hover {
            color: var(--px5cu-primary);
            background: rgba(191, 0, 0, 0.05);
        }

        .px5cu-nav-menu li a.active {
            color: #fff;
            background: var(--px5cu-primary);
        }

        /* Hero 区域 - 独特非对称布局 */
        .px5cu-hero {
            padding: 160px 24px 80px;
            background: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
            display: flex;
            justify-content: center;
            align-items: center;
            text-align: center;
        }

        .px5cu-hero-content {
            max-width: 900px;
            min-width: 0;
        }

        .px5cu-hero h1 {
            font-size: clamp(2.5rem, 5vw, 4rem);
            line-height: 1.1;
            margin-bottom: 24px;
            color: var(--px5cu-secondary);
            font-weight: 800;
        }

        .px5cu-hero p {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: var(--px5cu-text-muted);
            margin-bottom: 32px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        /* 快捷键核心区域 */
        .px5cu-main-section {
            max-width: 1100px;
            margin: 0 auto;
            padding: 80px 24px;
        }

        .px5cu-section-title {
            text-align: center;
            margin-bottom: 64px;
        }

        .px5cu-section-title h2 {
            font-size: 2.5rem;
            margin-bottom: 16px;
            position: relative;
            display: inline-block;
        }

        .px5cu-section-title h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background: var(--px5cu-primary);
            border-radius: 2px;
        }

        .px5cu-shortcut-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            flex-wrap: wrap;
        }

        .px5cu-shortcut-card {
            background: #fff;
            border-radius: var(--px5cu-radius);
            padding: 32px;
            box-shadow: var(--px5cu-shadow);
            border: 1px solid rgba(0,0,0,0.03);
            transition: transform 0.3s ease;
            min-width: 0;
            word-break: break-word;
        }

        .px5cu-shortcut-card:hover {
            transform: translateY(-8px);
        }

        .px5cu-card-header {
            display: flex;
            align-items: center;
            margin-bottom: 24px;
            border-bottom: 2px solid var(--px5cu-bg-light);
            padding-bottom: 12px;
        }

        .px5cu-card-header h3 {
            font-size: 1.25rem;
            color: var(--px5cu-primary);
        }

        .px5cu-shortcut-list {
            list-style: none;
        }

        .px5cu-shortcut-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px dashed #eee;
        }

        .px5cu-shortcut-item:last-child {
            border-bottom: none;
        }

        .px5cu-key-binding {
            background: #f1f1f1;
            padding: 4px 10px;
            border-radius: 4px;
            font-family: monospace;
            font-weight: bold;
            font-size: 0.9rem;
            color: var(--px5cu-secondary);
            border-bottom: 2px solid #ccc;
        }

        .px5cu-key-desc {
            font-size: 0.95rem;
            color: var(--px5cu-text-dark);
        }

        /* 效率流展示区 */
        .px5cu-workflow-section {
            background: var(--px5cu-secondary);
            color: #fff;
            padding: 80px 24px;
        }

        .px5cu-workflow-container {
            max-width: 1100px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
        }

        .px5cu-workflow-item {
            flex: 1;
            min-width: 300px;
            background: rgba(255,255,255,0.05);
            padding: 40px;
            border-radius: var(--px5cu-radius);
            border-left: 4px solid var(--px5cu-primary);
        }

        .px5cu-workflow-item h4 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: #fff;
        }

        .px5cu-efficiency-tag {
            display: inline-block;
            background: var(--px5cu-primary);
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.8rem;
            margin-top: 16px;
        }

        /* 动态资讯区块标记 */
        .px5cu-news-section {
            padding: 80px 24px;
            background: #fff;
        }

        /* 页脚 */
        .px5cu-footer {
            background: #1a1a1a;
            color: #fff;
            padding: 64px 24px 32px;
        }

        .px5cu-footer-grid {
            max-width: 1100px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
            margin-bottom: 48px;
        }

        .px5cu-footer-brand {
            flex: 1;
            min-width: 250px;
        }

        .px5cu-footer-brand h2 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--px5cu-primary);
        }

        .px5cu-footer-links {
            flex: 2;
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
        }

        .px5cu-footer-col {
            min-width: 150px;
        }

        .px5cu-footer-col h5 {
            margin-bottom: 20px;
            font-size: 1.1rem;
        }

        .px5cu-footer-col ul {
            list-style: none;
        }

        .px5cu-footer-col ul li {
            margin-bottom: 10px;
        }

        .px5cu-footer-col ul li a {
            color: #aaa;
            text-decoration: none;
            transition: color 0.3s;
        }

        .px5cu-footer-col ul li a:hover {
            color: #fff;
        }

        .px5cu-copyright {
            text-align: center;
            padding-top: 32px;
            border-top: 1px solid #333;
            color: #666;
            font-size: 0.9rem;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .px5cu-nav-container {
                height: auto;
                padding: 16px;
            }
            .px5cu-nav-menu {
                margin-top: 16px;
                justify-content: center;
                gap: 8px;
            }
            .px5cu-hero {
                padding: 120px 24px 60px;
            }
            .px5cu-shortcut-grid {
                grid-template-columns: 1fr;
            }
        }