/* 变量与基础重置 */
        :root {
            --px5cu-primary: #BF0000;
            --px5cu-primary-dark: #8B0000;
            --px5cu-secondary: #2c3e50;
            --px5cu-text: #333333;
            --px5cu-text-light: #666666;
            --px5cu-bg-light: #f8fafc;
            --px5cu-white: #ffffff;
            --px5cu-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --px5cu-radius: 16px;
            --px5cu-container: 1100px;
        }

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

        body {
            font-family: "Inter", "Segoe UI", "PingFang SC", sans-serif;
            color: var(--px5cu-text);
            line-height: 1.6;
            background-color: var(--px5cu-white);
            word-break: break-word;
            overflow-x: hidden;
        }

        /* 导航栏 */
        .px5cu-header {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }

        .px5cu-nav-container {
            max-width: var(--px5cu-container);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            padding: 12px 24px;
        }

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

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

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

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

        .px5cu-menu-link {
            text-decoration: none;
            color: var(--px5cu-text-light);
            font-size: 14px;
            font-weight: 500;
            padding: 8px 4px;
            transition: color 0.3s;
            position: relative;
        }

        .px5cu-menu-link:hover {
            color: var(--px5cu-primary);
        }

        .px5cu-menu-link.px5cu-active {
            color: var(--px5cu-primary);
        }

        .px5cu-menu-link.px5cu-active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--px5cu-primary);
        }

        /* Hero 区块 - 独特非对称布局 */
        .px5cu-hero {
            padding: 160px 24px 80px;
            background: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
            overflow: hidden;
            position: relative;
        }

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

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

        .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, 5vw + 1rem, 3.5rem);
            line-height: 1.2;
            font-weight: 800;
            margin-bottom: 24px;
            color: var(--px5cu-secondary);
        }

        .px5cu-hero-subtitle {
            font-size: clamp(1rem, 2vw + 0.5rem, 1.25rem);
            color: var(--px5cu-text-light);
            margin-bottom: 40px;
            max-width: 600px;
        }

        .px5cu-hero-visual {
            flex: 1;
            min-width: 320px;
            position: relative;
        }

        /* 纯CSS设计的抽象传输视觉 */
        .px5cu-visual-box {
            width: 100%;
            height: 400px;
            background: var(--px5cu-white);
            border-radius: var(--px5cu-radius);
            box-shadow: var(--px5cu-shadow);
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }

        .px5cu-data-flow {
            position: absolute;
            width: 80%;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--px5cu-primary), transparent);
            animation: px5cu-flow 2s infinite linear;
        }

        @keyframes px5cu-flow {
            0% { transform: translateX(-100%); }
            100% { transform: translateX(100%); }
        }

        /* 核心工作流区块 */
        .px5cu-section {
            padding: 96px 24px;
            max-width: var(--px5cu-container);
            margin: 0 auto;
        }

        .px5cu-section-title {
            text-align: center;
            font-size: clamp(1.5rem, 3vw + 0.5rem, 2.5rem);
            margin-bottom: 64px;
            font-weight: 700;
        }

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

        .px5cu-workflow-card {
            background: var(--px5cu-bg-light);
            padding: 40px;
            border-radius: var(--px5cu-radius);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            border: 1px solid rgba(0,0,0,0.03);
            min-width: 0;
        }

        .px5cu-workflow-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--px5cu-shadow);
            background: var(--px5cu-white);
        }

        .px5cu-scenario {
            font-size: 13px;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--px5cu-primary);
            margin-bottom: 12px;
            font-weight: 700;
        }

        .px5cu-use-case {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--px5cu-secondary);
        }

        .px5cu-feature-highlight {
            font-size: 15px;
            margin-bottom: 24px;
            color: var(--px5cu-text-light);
            padding-left: 16px;
            border-left: 3px solid var(--px5cu-primary);
        }

        .px5cu-efficiency {
            display: inline-flex;
            align-items: center;
            background: #e6fffa;
            color: #2c7a7b;
            padding: 4px 12px;
            border-radius: 4px;
            font-size: 14px;
            font-weight: 600;
        }

        /* 详细功能展示 - 对角线分割 */
        .px5cu-feature-split {
            background: var(--px5cu-secondary);
            color: var(--px5cu-white);
            padding: 100px 0;
            margin: 80px 0;
            transform: skewY(-2deg);
        }

        .px5cu-feature-split-inner {
            transform: skewY(2deg);
            max-width: var(--px5cu-container);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
        }

        .px5cu-split-text {
            flex: 1;
            min-width: 300px;
        }

        .px5cu-split-text h2 {
            font-size: 2.5rem;
            margin-bottom: 24px;
        }

        .px5cu-split-text p {
            font-size: 1.1rem;
            opacity: 0.9;
            margin-bottom: 32px;
        }

        .px5cu-feature-list {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            min-width: 0;
        }

        .px5cu-list-item {
            flex: 1;
            min-width: 200px;
            background: rgba(255,255,255,0.05);
            padding: 24px;
            border-radius: 12px;
        }

        /* 底部操作区 */
        .px5cu-cta-section {
            text-align: center;
            background: var(--px5cu-primary);
            padding: 80px 24px;
            border-radius: 40px;
            margin: 80px 24px;
            color: var(--px5cu-white);
        }

        .px5cu-btn {
            display: inline-block;
            padding: 16px 48px;
            background: var(--px5cu-white);
            color: var(--px5cu-primary);
            text-decoration: none;
            border-radius: 50px;
            font-weight: 700;
            font-size: 18px;
            transition: all 0.3s;
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
        }

        .px5cu-btn:hover {
            transform: scale(1.05);
            box-shadow: 0 6px 20px rgba(0,0,0,0.3);
        }

        /* 页脚 */
        .px5cu-footer {
            background: #1a202c;
            color: #a0aec0;
            padding: 64px 24px;
        }

        .px5cu-footer-container {
            max-width: var(--px5cu-container);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
        }

        .px5cu-footer-brand {
            flex: 1;
            min-width: 280px;
        }

        .px5cu-footer-brand-name {
            color: var(--px5cu-white);
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .px5cu-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
        }

        .px5cu-footer-col h4 {
            color: var(--px5cu-white);
            margin-bottom: 24px;
            font-size: 16px;
        }

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

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

        .px5cu-footer-col a {
            color: inherit;
            text-decoration: none;
            transition: color 0.3s;
        }

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

        .px5cu-copyright {
            margin-top: 64px;
            padding-top: 32px;
            border-top: 1px solid rgba(255,255,255,0.05);
            text-align: center;
            font-size: 14px;
        }

        /* 移动端适配 */
        @media (max-width: 768px) {
            .px5cu-nav-container {
                justify-content: center;
            }
            .px5cu-menu {
                justify-content: center;
                margin-top: 16px;
            }
            .px5cu-hero {
                padding-top: 120px;
                text-align: center;
            }
            .px5cu-hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }
            .px5cu-feature-split-inner {
                flex-direction: column;
            }
            .px5cu-section {
                padding: 64px 24px;
            }
        }