:root {
            --xa698d-primary: #d32f2f;
            --xa698d-primary-light: #ff6659;
            --xa698d-secondary: #1976d2;
            --xa698d-dark: #263238;
            --xa698d-bg: #f8fafc;
            --xa698d-white: #ffffff;
            --xa698d-text: #37474f;
            --xa698d-text-light: #78909c;
            --xa698d-accent: #fbc02d;
            --xa698d-shadow: 0 10px 30px rgba(0,0,0,0.08);
            --xa698d-radius: 16px;
            --xa698d-container: 1320px;
        }

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

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background-color: var(--xa698d-bg);
            color: var(--xa698d-text);
            line-height: 1.7;
            overflow-x: hidden;
            word-break: break-word;
        }

        /* 导航栏 */
        .xa698d-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(0,0,0,0.05);
            transition: all 0.3s ease;
        }

        .xa698d-nav-container {
            max-width: var(--xa698d-container);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            height: 80px;
        }

        .xa698d-logo {
            flex: 0 0 auto;
            min-width: 0;
        }

        .xa698d-logo img {
            height: 40px;
            width: auto;
            display: block;
        }

        .xa698d-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 8px;
        }

        .xa698d-menu-item {
            min-width: 0;
        }

        .xa698d-menu-link {
            text-decoration: none;
            color: var(--xa698d-text);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 16px;
            border-radius: 8px;
            transition: all 0.3s;
            white-space: nowrap;
        }

        .xa698d-menu-link:hover {
            color: var(--xa698d-primary);
            background: rgba(211, 47, 47, 0.05);
        }

        .xa698d-menu-link.active {
            color: var(--xa698d-white);
            background: var(--xa698d-primary);
        }

        /* Hero 区块 - 独特非对称布局 */
        .xa698d-hero {
            padding: 160px 0 100px;
            background: radial-gradient(circle at 90% 10%, rgba(211, 47, 47, 0.05) 0%, transparent 40%),
                        linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
            position: relative;
            overflow: hidden;
        }

        .xa698d-hero-inner {
            max-width: var(--xa698d-container);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
        }

        .xa698d-hero-content {
            flex: 1 1 500px;
            min-width: 0;
            padding-right: 48px;
        }

        .xa698d-hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(211, 47, 47, 0.1);
            color: var(--xa698d-primary);
            border-radius: 50px;
            font-weight: 600;
            font-size: 14px;
            margin-bottom: 24px;
        }

        .xa698d-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4rem);
            line-height: 1.2;
            font-weight: 800;
            color: var(--xa698d-dark);
            margin-bottom: 24px;
        }

        .xa698d-hero-subtitle {
            font-size: clamp(1.1rem, 1vw + 0.8rem, 1.3rem);
            color: var(--xa698d-text-light);
            margin-bottom: 40px;
            max-width: 600px;
        }

        .xa698d-hero-visual {
            flex: 1 1 450px;
            min-width: 0;
            position: relative;
        }

        .xa698d-template-card-stack {
            position: relative;
            height: 400px;
            display: flex;
            justify-content: center;
            align-items: center;
        }

        .xa698d-preview-card {
            position: absolute;
            width: 280px;
            height: 180px;
            background: var(--xa698d-white);
            border-radius: 12px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.1);
            border: 1px solid rgba(0,0,0,0.05);
            padding: 15px;
            transition: all 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        }

        .xa698d-preview-card:nth-child(1) { transform: rotate(-10deg) translateX(-60px); z-index: 1; }
        .xa698d-preview-card:nth-child(2) { transform: rotate(5deg) translateY(-20px); z-index: 3; border-top: 4px solid var(--xa698d-primary); }
        .xa698d-preview-card:nth-child(3) { transform: rotate(15deg) translateX(60px); z-index: 2; }

        .xa698d-preview-card:hover {
            transform: scale(1.1) rotate(0deg) translateY(-10px) !important;
            z-index: 10;
        }

        .xa698d-card-skeleton {
            height: 10px;
            background: #eee;
            margin-bottom: 10px;
            border-radius: 4px;
        }

        /* 核心技术层区块 */
        .xa698d-section {
            padding: 96px 0;
            max-width: var(--xa698d-container);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .xa698d-section-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .xa698d-section-title {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 16px;
        }

        .xa698d-layers-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .xa698d-layer-card {
            background: var(--xa698d-white);
            padding: 40px;
            border-radius: var(--xa698d-radius);
            box-shadow: var(--xa698d-shadow);
            transition: transform 0.3s;
            border-bottom: 4px solid transparent;
        }

        .xa698d-layer-card:hover {
            transform: translateY(-8px);
            border-color: var(--xa698d-primary);
        }

        .xa698d-layer-name {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--xa698d-primary);
        }

        .xa698d-tech-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 24px;
        }

        .xa698d-tag {
            font-size: 12px;
            padding: 4px 12px;
            background: #f1f5f9;
            color: var(--xa698d-text-light);
            border-radius: 4px;
        }

        /* 版本矩阵区 - 独特横向拉伸布局 */
        .xa698d-matrix-section {
            background: var(--xa698d-dark);
            color: var(--xa698d-white);
            padding: 96px 0;
        }

        .xa698d-matrix-container {
            max-width: var(--xa698d-container);
            margin: 0 auto;
            padding: 0 24px;
        }

        .xa698d-matrix-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
        }

        .xa698d-matrix-card {
            flex: 1 1 350px;
            min-width: 0;
            background: rgba(255, 255, 255, 0.05);
            padding: 32px;
            border-radius: var(--xa698d-radius);
            border: 1px solid rgba(255, 255, 255, 0.1);
            transition: all 0.3s;
        }

        .xa698d-matrix-card:hover {
            background: rgba(255, 255, 255, 0.1);
            box-shadow: 0 10px 40px rgba(0,0,0,0.3);
        }

        .xa698d-edition-name {
            font-size: 1.25rem;
            color: var(--xa698d-accent);
            margin-bottom: 8px;
            font-weight: 600;
        }

        .xa698d-spec-list {
            margin: 24px 0;
            list-style: none;
            font-size: 14px;
            opacity: 0.8;
        }

        .xa698d-spec-item {
            display: flex;
            justify-content: space-between;
            margin-bottom: 8px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            padding-bottom: 4px;
        }

        /* 知识库区块 */
        .xa698d-kb-section {
            background: #fff;
        }

        .xa698d-article-list {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
        }

        .xa698d-article-item {
            flex: 1 1 300px;
            min-width: 0;
            padding: 24px;
            border: 1px solid #edf2f7;
            border-radius: 12px;
            transition: all 0.3s;
        }

        .xa698d-article-item:hover {
            border-color: var(--xa698d-primary);
            background: #fffafa;
        }

        .xa698d-article-topic {
            font-weight: 600;
            font-size: 1.1rem;
            margin-bottom: 12px;
            color: var(--xa698d-dark);
        }

        /* 评价区 */
        .xa698d-feedback-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 32px;
            margin-top: 48px;
        }

        .xa698d-feedback-card {
            flex: 1 1 400px;
            min-width: 0;
            background: #fdfdfd;
            padding: 32px;
            border-radius: 20px;
            position: relative;
            box-shadow: 0 4px 15px rgba(0,0,0,0.03);
        }

        .xa698d-quote {
            font-size: 1.1rem;
            font-style: italic;
            color: var(--xa698d-text);
            margin-bottom: 20px;
        }

        .xa698d-user-info {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .xa698d-user-role {
            font-weight: 700;
            color: var(--xa698d-primary);
        }

        /* 页脚 */
        .xa698d-footer {
            background: var(--xa698d-dark);
            color: #94a3b8;
            padding: 80px 0 40px;
        }

        .xa698d-footer-container {
            max-width: var(--xa698d-container);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
        }

        .xa698d-footer-brand {
            flex: 1 1 300px;
            min-width: 0;
            margin-bottom: 40px;
        }

        .xa698d-brand-text {
            color: var(--xa698d-white);
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .xa698d-footer-links {
            flex: 2 1 500px;
            min-width: 0;
            display: flex;
            flex-wrap: wrap;
            gap: 40px;
        }

        .xa698d-link-group {
            flex: 1 1 150px;
            min-width: 0;
        }

        .xa698d-link-group h4 {
            color: var(--xa698d-white);
            margin-bottom: 24px;
        }

        .xa698d-footer-a {
            display: block;
            color: inherit;
            text-decoration: none;
            margin-bottom: 12px;
            transition: color 0.3s;
        }

        .xa698d-footer-a:hover {
            color: var(--xa698d-primary-light);
        }

        .xa698d-copyright {
            width: 100%;
            padding-top: 40px;
            margin-top: 40px;
            border-top: 1px solid rgba(255,255,255,0.05);
            text-align: center;
            font-size: 14px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .xa698d-menu {
                display: none; /* 简化演示，手机端通常用汉堡菜单 */
            }
            .xa698d-hero {
                padding: 120px 0 60px;
                text-align: center;
            }
            .xa698d-hero-content {
                padding-right: 0;
                margin-bottom: 60px;
            }
            .xa698d-hero-inner {
                flex-direction: column;
            }
            .xa698d-hero-visual {
                width: 100%;
            }
        }