:root {
            --px5cu-primary: #bf0000;
            --px5cu-primary-dark: #8b0000;
            --px5cu-secondary: #2c3e50;
            --px5cu-bg-light: #f8f9fa;
            --px5cu-text-main: #333333;
            --px5cu-text-muted: #666666;
            --px5cu-white: #ffffff;
            --px5cu-spacing-base: 8px;
            --px5cu-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --px5cu-radius: 16px;
        }

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

        body {
            font-family: "Inter", "Microsoft YaHei", sans-serif;
            color: var(--px5cu-text-main);
            line-height: 1.6;
            background-color: var(--px5cu-bg-light);
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 布局容器 */
        .px5cu-container {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 24px;
            width: 100%;
        }

        /* 导航栏 */
        .px5cu-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(15px);
            z-index: 1000;
            border-bottom: 1px solid rgba(0,0,0,0.05);
            box-shadow: var(--px5cu-shadow);
        }

        .px5cu-nav-wrapper {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0;
        }

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

        .px5cu-logo img {
            height: 42px;
            width: auto;
            display: block;
        }

        .px5cu-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 4px;
        }

        .px5cu-nav-item {
            min-width: 0;
        }

        .px5cu-nav-link {
            text-decoration: none;
            color: var(--px5cu-secondary);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 12px;
            border-radius: 8px;
            transition: all 0.3s ease;
            white-space: nowrap;
        }

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

        .px5cu-nav-link.px5cu-active {
            color: var(--px5cu-white);
            background: var(--px5cu-primary);
        }

        /* Hero 区块 */
        .px5cu-hero {
            padding: 160px 0 80px;
            background: radial-gradient(circle at top right, #fff5f5, #ffffff);
            position: relative;
            overflow: hidden;
        }

        .px5cu-hero-inner {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

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

        .px5cu-badge {
            display: inline-block;
            background: rgba(191, 0, 0, 0.1);
            color: var(--px5cu-primary);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
        }

        .px5cu-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            line-height: 1.1;
            font-weight: 800;
            color: var(--px5cu-secondary);
            margin-bottom: 24px;
            white-space: normal;
        }

        .px5cu-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--px5cu-text-muted);
            margin-bottom: 40px;
            max-width: 600px;
            line-height: 1.8;
        }

        /* 自动化场景区块 */
        .px5cu-section {
            padding: 96px 0;
        }

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

        .px5cu-section-title h2 {
            font-size: 2.5rem;
            color: var(--px5cu-secondary);
            margin-bottom: 16px;
        }

        .px5cu-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
            gap: 32px;
        }

        .px5cu-card {
            background: var(--px5cu-white);
            border-radius: var(--px5cu-radius);
            padding: 40px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
            border: 1px solid rgba(0,0,0,0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
            min-width: 0;
        }

        .px5cu-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--px5cu-shadow);
        }

        .px5cu-card-tag {
            font-size: 12px;
            text-transform: uppercase;
            color: var(--px5cu-primary);
            font-weight: 700;
            letter-spacing: 1px;
            margin-bottom: 16px;
        }

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

        .px5cu-card-body {
            font-size: 1rem;
            color: var(--px5cu-text-muted);
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .px5cu-efficiency-box {
            background: #fffafa;
            border-left: 4px solid var(--px5cu-primary);
            padding: 16px;
            margin-top: auto;
        }

        .px5cu-efficiency-value {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--px5cu-primary);
            display: block;
        }

        .px5cu-efficiency-label {
            font-size: 0.85rem;
            color: var(--px5cu-text-muted);
        }

        /* 核心功能区 (独特性布局) */
        .px5cu-feature-split {
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            align-items: center;
            padding: 80px 48px;
            background: var(--px5cu-secondary);
            border-radius: 32px;
            color: var(--px5cu-white);
        }

        .px5cu-feature-visual {
            flex: 1;
            min-width: 300px;
            background: rgba(255,255,255,0.05);
            padding: 40px;
            border-radius: 24px;
            font-family: 'Courier New', Courier, monospace;
            font-size: 0.9rem;
            border: 1px solid rgba(255,255,255,0.1);
        }

        .px5cu-code-line {
            display: block;
            margin-bottom: 8px;
            color: #a5d6ff;
        }

        .px5cu-code-line.px5cu-cmd { color: #ff7b72; }
        .px5cu-code-line.px5cu-comment { color: #8b949e; }

        .px5cu-feature-text {
            flex: 1;
            min-width: 320px;
        }

        .px5cu-feature-text h3 {
            font-size: 2rem;
            margin-bottom: 24px;
        }

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

        .px5cu-feature-item {
            margin-bottom: 20px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }

        .px5cu-feature-icon {
            width: 24px;
            height: 24px;
            background: var(--px5cu-primary);
            border-radius: 6px;
            flex-shrink: 0;
            margin-top: 4px;
        }

        /* 动态内容区 */
        .px5cu-news-section {
            background: #fff;
            padding: 80px 0;
        }

        /* 页脚 */
        .px5cu-footer {
            background: #1a1a1a;
            color: #999;
            padding: 80px 0 40px;
        }

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

        .px5cu-footer-brand h4 {
            color: var(--px5cu-white);
            font-size: 1.5rem;
            margin-bottom: 16px;
        }

        .px5cu-footer-links h5 {
            color: var(--px5cu-white);
            margin-bottom: 24px;
        }

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

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

        .px5cu-footer-links a {
            color: #999;
            text-decoration: none;
            transition: color 0.3s;
        }

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

        .px5cu-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.05);
            font-size: 0.9rem;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .px5cu-nav-menu {
                justify-content: center;
                padding: 10px 0;
            }
            .px5cu-hero {
                padding-top: 200px;
                text-align: center;
            }
            .px5cu-hero-inner {
                justify-content: center;
            }
            .px5cu-hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }
            .px5cu-grid {
                grid-template-columns: 1fr;
            }
            .px5cu-feature-split {
                padding: 40px 24px;
            }
        }