/* 基础变量与重置 */
        :root {
            --px5cu-primary: #bf0000;
            --px5cu-primary-dark: #8b0000;
            --px5cu-text-main: #2c3e50;
            --px5cu-text-light: #5d6d7e;
            --px5cu-bg-soft: #f8f9fa;
            --px5cu-white: #ffffff;
            --px5cu-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --px5cu-radius: 16px;
            --px5cu-container-width: 1100px;
        }

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

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

        /* 导航栏 */
        .px5cu-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(15px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }

        .px5cu-nav-container {
            max-width: var(--px5cu-container-width);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            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: 16px;
            min-width: 0;
        }

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

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

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

        /* Hero 区域 - 独特对角线卡片布局 */
        .px5cu-hero {
            padding: 160px 24px 100px;
            background: linear-gradient(135deg, #fdfbfb 0%, #ebedee 100%);
            position: relative;
            overflow: hidden;
        }

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

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

        .px5cu-hero-title {
            font-size: clamp(2rem, 4vw + 1rem, 3.5rem);
            line-height: 1.2;
            font-weight: 800;
            margin-bottom: 24px;
            color: var(--px5cu-primary-dark);
            word-break: keep-all;
        }

        .px5cu-hero-subtitle {
            font-size: clamp(1rem, 1.5vw + 0.5rem, 1.25rem);
            color: var(--px5cu-text-light);
            margin-bottom: 32px;
            max-width: 600px;
        }

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

        /* 导出工作流展示区 */
        .px5cu-workflow {
            padding: 96px 24px;
        }

        .px5cu-section-header {
            text-align: center;
            max-width: 800px;
            margin: 0 auto 64px;
        }

        .px5cu-section-title {
            font-size: clamp(1.75rem, 3vw, 2.5rem);
            margin-bottom: 16px;
        }

        .px5cu-grid {
            max-width: var(--px5cu-container-width);
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
        }

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

        .px5cu-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.12);
        }

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

        .px5cu-card-h3 {
            font-size: 20px;
            margin-bottom: 16px;
            color: var(--px5cu-text-main);
        }

        .px5cu-card-p {
            font-size: 15px;
            color: var(--px5cu-text-light);
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .px5cu-efficiency {
            background: var(--px5cu-bg-soft);
            padding: 12px 20px;
            border-radius: 8px;
            font-weight: 600;
            color: #27ae60;
            font-size: 14px;
        }

        /* 详情功能区 */
        .px5cu-detail-section {
            padding: 80px 24px;
            background: var(--px5cu-text-main);
            color: var(--px5cu-white);
        }

        .px5cu-detail-container {
            max-width: var(--px5cu-container-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            align-items: center;
        }

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

        .px5cu-detail-visual {
            flex: 1;
            min-width: 320px;
            background: rgba(255,255,255,0.05);
            padding: 48px;
            border-radius: 24px;
            border: 1px solid rgba(255,255,255,0.1);
        }

        .px5cu-list {
            list-style: none;
            margin-top: 32px;
        }

        .px5cu-list-item {
            display: flex;
            gap: 16px;
            margin-bottom: 20px;
            font-size: 16px;
        }

        .px5cu-list-item::before {
            content: "✓";
            color: var(--px5cu-primary);
            font-weight: bold;
        }

        /* 动态内容区块 */
        .px5cu-news-section {
            padding: 96px 24px;
            background: var(--px5cu-bg-soft);
        }

        /* 页脚 */
        .px5cu-footer {
            background: #1a1a1a;
            color: #999;
            padding: 80px 24px 40px;
        }

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

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

        .px5cu-footer-brand-name {
            color: var(--px5cu-white);
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .px5cu-footer-links {
            flex: 2;
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
        }

        .px5cu-footer-column {
            flex: 1;
            min-width: 150px;
        }

        .px5cu-footer-h4 {
            color: var(--px5cu-white);
            font-size: 16px;
            margin-bottom: 20px;
        }

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

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

        .px5cu-footer-column a {
            color: #999;
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s;
        }

        .px5cu-footer-column a:hover {
            color: var(--px5cu-white);
        }

        .px5cu-copyright {
            max-width: var(--px5cu-container-width);
            margin: 60px auto 0;
            padding-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
            font-size: 13px;
        }

        /* 响应式适配 */
        @media (max-width: 768px) {
            .px5cu-nav-container {
                height: auto;
                padding: 16px 24px;
            }
            .px5cu-menu {
                width: 100%;
                justify-content: center;
                margin-top: 16px;
                gap: 8px;
            }
            .px5cu-menu-item a {
                font-size: 12px;
                padding: 6px 10px;
            }
            .px5cu-hero {
                padding-top: 180px;
                text-align: center;
            }
            .px5cu-hero-content {
                display: flex;
                flex-direction: column;
                align-items: center;
            }
            .px5cu-detail-visual {
                padding: 24px;
            }
        }