:root {
            --k8qm-primary: #0052cc;
            --k8qm-accent: #00d4ff;
            --k8qm-dark: #0a0e14;
            --k8qm-light: #f4f7fa;
            --k8qm-text: #2d3436;
            --k8qm-gray: #636e72;
            --k8qm-container-width: 1140px;
            --k8qm-transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
        }

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
            color: var(--k8qm-text);
            line-height: 1.6;
            background-color: #ffffff;
            word-break: keep-all;
            overflow-x: hidden;
        }

        /* 布局基础 */
        .k8qm-container {
            max-width: var(--k8qm-container-width);
            margin: 0 auto;
            padding: 0 24px;
        }

        .k8qm-flex {
            display: flex;
            flex-wrap: wrap;
        }

        .k8qm-flex-item {
            min-width: 0;
        }

        /* 导航栏 */
        .k8qm-header {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            padding: 16px 0;
        }

        .k8qm-nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .k8qm-logo img {
            height: 40px;
            width: auto;
            display: block;
        }

        .k8qm-nav-menu {
            display: flex;
            list-style: none;
            gap: 24px;
        }

        .k8qm-nav-link {
            text-decoration: none;
            color: var(--k8qm-text);
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--k8qm-transition);
            position: relative;
        }

        .k8qm-nav-link:hover, .k8qm-nav-link.k8qm-active {
            color: var(--k8qm-primary);
        }

        .k8qm-nav-link.k8qm-active::after {
            content: '';
            position: absolute;
            bottom: -6px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--k8qm-primary);
        }

        /* Hero 下载区 */
        .k8qm-hero {
            padding: 160px 0 80px;
            background: radial-gradient(circle at 90% 10%, rgba(0, 82, 204, 0.05) 0%, rgba(255, 255, 255, 0) 50%);
            position: relative;
            overflow: hidden;
        }

        .k8qm-hero-split {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 48px;
        }

        .k8qm-hero-content {
            flex: 1;
            min-width: 320px;
        }

        .k8qm-hero-visual {
            flex: 1.2;
            min-width: 320px;
            position: relative;
        }

        .k8qm-hero-title {
            font-size: clamp(2.5rem, 5vw, 3.8rem);
            line-height: 1.1;
            font-weight: 800;
            color: var(--k8qm-dark);
            margin-bottom: 24px;
            word-break: break-word;
        }

        .k8qm-hero-subtitle {
            font-size: clamp(1.1rem, 2vw, 1.3rem);
            color: var(--k8qm-gray);
            margin-bottom: 40px;
            max-width: 600px;
        }

        .k8qm-main-download-card {
            background: white;
            border-radius: 24px;
            padding: 40px;
            box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.1);
            border: 1px solid rgba(0, 82, 204, 0.1);
            position: relative;
            z-index: 2;
        }

        .k8qm-btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--k8qm-primary), #003d99);
            color: white;
            padding: 18px 40px;
            border-radius: 12px;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            transition: var(--k8qm-transition);
            box-shadow: 0 10px 20px rgba(0, 82, 204, 0.2);
        }

        .k8qm-btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 15px 30px rgba(0, 82, 204, 0.3);
        }

        /* 下载选项网格 */
        .k8qm-download-options {
            padding: 80px 0;
            background-color: var(--k8qm-light);
        }

        .k8qm-section-header {
            text-align: center;
            margin-bottom: 64px;
        }

        .k8qm-section-title {
            font-size: clamp(1.8rem, 3vw, 2.4rem);
            margin-bottom: 16px;
        }

        .k8qm-download-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
        }

        .k8qm-option-card {
            background: white;
            border-radius: 20px;
            overflow: hidden;
            transition: var(--k8qm-transition);
            display: flex;
            flex-direction: column;
            border: 1px solid transparent;
        }

        .k8qm-option-card:hover {
            transform: translateY(-10px);
            border-color: var(--k8qm-primary);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
        }

        .k8qm-card-image {
            height: 220px;
            overflow: hidden;
        }

        .k8qm-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--k8qm-transition);
        }

        .k8qm-option-card:hover .k8qm-card-image img {
            transform: scale(1.05);
        }

        .k8qm-card-body {
            padding: 32px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .k8qm-card-tag {
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--k8qm-primary);
            font-weight: 700;
            margin-bottom: 12px;
        }

        .k8qm-card-h3 {
            font-size: 1.5rem;
            margin-bottom: 16px;
            color: var(--k8qm-dark);
        }

        .k8qm-card-text {
            color: var(--k8qm-gray);
            margin-bottom: 24px;
            font-size: 0.95rem;
        }

        .k8qm-btn-outline {
            margin-top: auto;
            display: inline-block;
            padding: 12px 24px;
            border: 2px solid var(--k8qm-primary);
            color: var(--k8qm-primary);
            text-decoration: none;
            border-radius: 8px;
            font-weight: 600;
            text-align: center;
            transition: var(--k8qm-transition);
        }

        .k8qm-btn-outline:hover {
            background: var(--k8qm-primary);
            color: white;
        }

        /* 性能测评 */
        .k8qm-benchmarks {
            padding: 96px 0;
            background: var(--k8qm-dark);
            color: white;
        }

        .k8qm-benchmark-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 40px;
        }

        .k8qm-metric-card {
            background: rgba(255, 255, 255, 0.05);
            padding: 32px;
            border-left: 4px solid var(--k8qm-accent);
            border-radius: 0 12px 12px 0;
        }

        .k8qm-metric-value {
            font-size: 3rem;
            font-weight: 800;
            color: var(--k8qm-accent);
            line-height: 1;
            margin-bottom: 8px;
        }

        .k8qm-metric-name {
            font-size: 1.2rem;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .k8qm-metric-desc {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
        }

        /* 垂直行业方案 */
        .k8qm-solutions {
            padding: 96px 0;
        }

        .k8qm-solution-row {
            display: flex;
            flex-wrap: wrap;
            gap: 48px;
            margin-bottom: 64px;
            align-items: center;
        }

        .k8qm-solution-row:nth-child(even) {
            flex-direction: row-reverse;
        }

        .k8qm-solution-text {
            flex: 1;
            min-width: 300px;
        }

        .k8qm-solution-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(0, 82, 204, 0.1);
            color: var(--k8qm-primary);
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
        }

        .k8qm-solution-impact {
            margin-top: 24px;
            padding: 20px;
            background: var(--k8qm-light);
            border-radius: 12px;
            border-left: 4px solid var(--k8qm-primary);
        }

        /* 路线图 */
        .k8qm-roadmap {
            padding: 96px 0;
            background: #f8fafc;
        }

        .k8qm-roadmap-container {
            max-width: 800px;
            margin: 0 auto;
        }

        .k8qm-roadmap-item {
            display: flex;
            gap: 32px;
            margin-bottom: 40px;
            position: relative;
        }

        .k8qm-roadmap-item::before {
            content: '';
            position: absolute;
            left: 20px;
            top: 40px;
            width: 2px;
            height: calc(100% + 40px);
            background: #e2e8f0;
        }

        .k8qm-roadmap-item:last-child::before {
            display: none;
        }

        .k8qm-roadmap-quarter {
            width: 44px;
            height: 44px;
            background: var(--k8qm-primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            flex-shrink: 0;
            z-index: 1;
        }

        .k8qm-roadmap-content {
            padding-top: 8px;
        }

        .k8qm-roadmap-milestone {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--k8qm-dark);
        }

        /* 证言区 */
        .k8qm-testimonials {
            padding: 96px 0;
        }

        .k8qm-testimony-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
            gap: 32px;
        }

        .k8qm-testimony-card {
            padding: 40px;
            border-radius: 24px;
            background: white;
            border: 1px solid #edf2f7;
            position: relative;
        }

        .k8qm-testimony-content {
            font-style: italic;
            font-size: 1.1rem;
            margin-bottom: 24px;
            color: var(--k8qm-text);
        }

        .k8qm-testimony-author {
            font-weight: 700;
            color: var(--k8qm-primary);
        }

        /* 页脚 */
        .k8qm-footer {
            background: var(--k8qm-dark);
            color: white;
            padding: 80px 0 40px;
        }

        .k8qm-footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .k8qm-footer-brand {
            font-size: 1.5rem;
            font-weight: 800;
            letter-spacing: -1px;
            margin-bottom: 24px;
        }

        .k8qm-footer-link {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            margin-bottom: 12px;
            transition: var(--k8qm-transition);
        }

        .k8qm-footer-link:hover {
            color: white;
            transform: translateX(5px);
        }

        .k8qm-footer-bottom {
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            text-align: center;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.4);
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .k8qm-nav-menu {
                display: none; /* 简化移动端，实际项目中应有汉堡菜单 */
            }
            .k8qm-hero-split {
                flex-direction: column;
                text-align: center;
            }
            .k8qm-hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }
            .k8qm-solution-row, .k8qm-solution-row:nth-child(even) {
                flex-direction: column;
            }
        }

        /* 动画增强 */
        .k8qm-fade-in {
            transition: opacity 0.8s ease-out, transform 0.8s ease-out;
        }
        
        [data-dynamic-content] {
            border-top: 1px solid #eee;
            padding-top: 2rem;
        }