:root {
            --px5cu-primary: #bf0000;
            --px5cu-primary-dark: #8b0000;
            --px5cu-accent: #2c3e50;
            --px5cu-bg-light: #f8f9fa;
            --px5cu-bg-white: #ffffff;
            --px5cu-text-main: #1a1a1a;
            --px5cu-text-muted: #555555;
            --px5cu-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --px5cu-max-width: 1100px;
            --px5cu-radius: 16px;
            --px5cu-shadow: 0 10px 30px rgba(0,0,0,0.05);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.7;
            color: var(--px5cu-text-main);
            background-color: var(--px5cu-bg-light);
            word-break: keep-all;
            overflow-wrap: break-word;
        }

        /* 导航栏设计 */
        .px5cu-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            box-shadow: var(--px5cu-shadow);
        }

        .px5cu-nav-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            min-height: 80px;
        }

        .px5cu-logo {
            flex-shrink: 0;
            min-width: 0;
        }

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

        .px5cu-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 8px;
            min-width: 0;
        }

        .px5cu-menu-item a {
            text-decoration: none;
            color: var(--px5cu-text-main);
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 30px;
            transition: var(--px5cu-transition);
            font-size: 0.95rem;
            display: block;
        }

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

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

        /* Hero 区块 - 独特非对称布局 */
        .px5cu-hero {
            padding: 96px 24px;
            background: linear-gradient(135deg, #fff 0%, #fdf2f2 100%);
            position: relative;
            overflow: hidden;
        }

        .px5cu-hero::before {
            content: "";
            position: absolute;
            top: -10%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(191, 0, 0, 0.03) 0%, transparent 70%);
            border-radius: 50%;
        }

        .px5cu-hero-inner {
            max-width: var(--px5cu-max-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .px5cu-hero-content {
            flex: 1;
            min-width: 320px;
        }

        .px5cu-hero-tag {
            display: inline-block;
            background: var(--px5cu-primary);
            color: white;
            padding: 4px 16px;
            border-radius: 4px;
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 24px;
        }

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

        .px5cu-hero-subtitle {
            font-size: clamp(1.1rem, 2vw, 1.3rem);
            color: var(--px5cu-text-muted);
            margin-bottom: 32px;
            max-width: 600px;
        }

        /* 教程核心内容区 */
        .px5cu-tutorial-section {
            padding: 96px 24px;
            max-width: var(--px5cu-max-width);
            margin: 0 auto;
        }

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

        .px5cu-section-title {
            font-size: clamp(1.8rem, 4vw, 2.5rem);
            margin-bottom: 16px;
            color: var(--px5cu-accent);
        }

        /* 工作流场景 - 模块化设计 */
        .px5cu-workflow-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            margin-bottom: 64px;
        }

        .px5cu-workflow-card {
            background: var(--px5cu-bg-white);
            border-radius: var(--px5cu-radius);
            padding: 40px;
            box-shadow: var(--px5cu-shadow);
            border: 1px solid rgba(0,0,0,0.03);
            transition: var(--px5cu-transition);
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .px5cu-workflow-card:hover {
            transform: translateY(-8px);
            border-color: var(--px5cu-primary);
        }

        .px5cu-scenario-tag {
            color: var(--px5cu-primary);
            font-weight: 700;
            font-size: 0.9rem;
            margin-bottom: 12px;
        }

        .px5cu-usecase-title {
            font-size: 1.5rem;
            margin-bottom: 20px;
            color: var(--px5cu-accent);
        }

        .px5cu-feature-highlight {
            background: #fff5f5;
            padding: 16px;
            border-left: 4px solid var(--px5cu-primary);
            margin-bottom: 24px;
            font-size: 0.95rem;
        }

        .px5cu-boost-badge {
            margin-top: auto;
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 600;
            color: #27ae60;
        }

        /* 动态内容标记区块 */
        .px5cu-news-section {
            background: #1a1a1a;
            color: #fff;
            padding: 80px 24px;
            border-radius: var(--px5cu-radius);
            margin: 0 24px 96px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .px5cu-nav-container {
                flex-direction: column;
                padding: 16px;
            }
            .px5cu-menu {
                justify-content: center;
                margin-top: 16px;
            }
            .px5cu-hero {
                padding: 64px 24px;
                text-align: center;
            }
            .px5cu-hero-inner {
                justify-content: center;
            }
            .px5cu-hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }
        }

        /* 页脚设计 */
        .px5cu-footer {
            background: #fff;
            padding: 80px 24px 40px;
            border-top: 1px solid #eee;
        }

        .px5cu-footer-grid {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .px5cu-footer-brand h3 {
            color: var(--px5cu-primary);
            font-size: 1.5rem;
            margin-bottom: 16px;
        }

        .px5cu-footer-links h4 {
            margin-bottom: 24px;
            font-size: 1.1rem;
        }

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

        .px5cu-footer-links li {
            margin-bottom: 12px;
        }

        .px5cu-footer-links a {
            text-decoration: none;
            color: var(--px5cu-text-muted);
            transition: var(--px5cu-transition);
        }

        .px5cu-footer-links a:hover {
            color: var(--px5cu-primary);
            padding-left: 4px;
        }

        .px5cu-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid #eee;
            color: var(--px5cu-text-muted);
            font-size: 0.9rem;
        }

        /* 按钮样式 */
        .px5cu-btn {
            display: inline-block;
            padding: 14px 32px;
            border-radius: 30px;
            text-decoration: none;
            font-weight: 600;
            transition: var(--px5cu-transition);
            cursor: pointer;
            border: none;
        }

        .px5cu-btn-primary {
            background: var(--px5cu-primary);
            color: white;
            box-shadow: 0 4px 15px rgba(191, 0, 0, 0.3);
        }

        .px5cu-btn-primary:hover {
            background: var(--px5cu-primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(191, 0, 0, 0.4);
        }