:root {
            --qdmij8-primary: #3fb1ff;
            --qdmij8-accent: #a855f7;
            --qdmij8-bg: #050505;
            --qdmij8-card-bg: rgba(255, 255, 255, 0.03);
            --qdmij8-text-main: #ffffff;
            --qdmij8-text-dim: #9ca3af;
            --qdmij8-border: rgba(255, 255, 255, 0.1);
            --qdmij8-font-clamp: clamp(1rem, 1.2vw + 0.5rem, 1.5rem);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            -webkit-font-smoothing: antialiased;
        }

        body {
            background-color: var(--qdmij8-bg);
            color: var(--qdmij8-text-main);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.6;
            overflow-x: hidden;
            word-break: keep-all;
        }

        /* 导航系统 */
        .qdmij8-nav-wrapper {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--qdmij8-border);
            background: rgba(5, 5, 5, 0.8);
        }

        .qdmij8-nav-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 24px;
            height: 72px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
        }

        .qdmij8-logo {
            display: flex;
            align-items: center;
            min-width: 0;
        }

        .qdmij8-logo img {
            height: 32px;
            width: auto;
            border-radius: 4px;
        }

        .qdmij8-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 24px;
            min-width: 0;
        }

        .qdmij8-menu li a {
            color: var(--qdmij8-text-dim);
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s ease;
            white-space: nowrap;
        }

        .qdmij8-menu li a:hover, 
        .qdmij8-menu li a.qdmij8-active {
            color: var(--qdmij8-primary);
        }

        /* Hero 核心下载区 */
        .qdmij8-hero {
            padding: 160px 24px 80px;
            max-width: 1100px;
            margin: 0 auto;
            text-align: center;
            position: relative;
        }

        .qdmij8-hero::before {
            content: "";
            position: absolute;
            top: -100px;
            left: 50%;
            transform: translateX(-50%);
            width: 80vw;
            height: 400px;
            background: radial-gradient(circle, rgba(63, 177, 255, 0.15) 0%, transparent 70%);
            z-index: -1;
        }

        .qdmij8-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(63, 177, 255, 0.1);
            border: 1px solid rgba(63, 177, 255, 0.2);
            border-radius: 100px;
            color: var(--qdmij8-primary);
            font-size: 14px;
            margin-bottom: 24px;
        }

        .qdmij8-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            font-weight: 800;
            line-height: 1.1;
            margin-bottom: 24px;
            letter-spacing: -0.02em;
            word-break: break-word;
        }

        .qdmij8-subtitle {
            font-size: var(--qdmij8-font-clamp);
            color: var(--qdmij8-text-dim);
            max-width: 800px;
            margin: 0 auto 48px;
            word-break: break-word;
        }

        .qdmij8-download-box {
            background: linear-gradient(145deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.01) 100%);
            border: 1px solid var(--qdmij8-border);
            padding: 48px;
            border-radius: 24px;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 24px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.4);
        }

        .qdmij8-btn-main {
            background: var(--qdmij8-primary);
            color: #000;
            padding: 18px 48px;
            border-radius: 12px;
            font-weight: 700;
            font-size: 18px;
            text-decoration: none;
            transition: transform 0.2s, box-shadow 0.2s;
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .qdmij8-btn-main:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 30px rgba(63, 177, 255, 0.4);
        }

        .qdmij8-version-info {
            font-size: 14px;
            color: var(--qdmij8-text-dim);
        }

        /* 非对称流体布局 - 创新支柱 */
        .qdmij8-features-section {
            padding: 96px 24px;
            max-width: 1400px;
            margin: 0 auto;
        }

        .qdmij8-innovation-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            margin-top: 64px;
        }

        .qdmij8-feature-card {
            background: var(--qdmij8-card-bg);
            border: 1px solid var(--qdmij8-border);
            border-radius: 20px;
            padding: 40px;
            transition: border-color 0.3s, transform 0.3s;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }

        .qdmij8-feature-card:hover {
            border-color: var(--qdmij8-primary);
            transform: translateY(-8px);
        }

        .qdmij8-feature-id {
            color: var(--qdmij8-primary);
            font-family: monospace;
            font-size: 12px;
            text-transform: uppercase;
            margin-bottom: 16px;
            letter-spacing: 2px;
        }

        .qdmij8-feature-title {
            font-size: 28px;
            margin-bottom: 16px;
        }

        .qdmij8-feature-tech {
            font-size: 15px;
            color: var(--qdmij8-text-dim);
            margin-bottom: 24px;
            flex-grow: 1;
        }

        .qdmij8-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 24px;
        }

        .qdmij8-tag {
            background: rgba(255,255,255,0.05);
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 12px;
            color: var(--qdmij8-primary);
        }

        .qdmij8-metric {
            border-top: 1px solid var(--qdmij8-border);
            padding-top: 20px;
            font-size: 14px;
            color: var(--qdmij8-accent);
            font-weight: 600;
        }

        /* 系统要求表格 */
        .qdmij8-spec-section {
            max-width: 900px;
            margin: 96px auto;
            padding: 0 24px;
        }

        .qdmij8-table-wrapper {
            width: 100%;
            overflow-x: auto;
            background: var(--qdmij8-card-bg);
            border-radius: 16px;
            border: 1px solid var(--qdmij8-border);
        }

        .qdmij8-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
        }

        .qdmij8-table th, .qdmij8-table td {
            padding: 24px;
            text-align: left;
            border-bottom: 1px solid var(--qdmij8-border);
        }

        .qdmij8-table th {
            color: var(--qdmij8-text-dim);
            font-weight: 500;
        }

        /* 动态内容区 */
        .qdmij8-news-section {
            background: linear-gradient(to bottom, transparent, rgba(168, 85, 247, 0.05));
            padding: 96px 24px;
        }

        /* 页脚 */
        .qdmij8-footer {
            border-top: 1px solid var(--qdmij8-border);
            padding: 80px 24px 40px;
            text-align: center;
        }

        .qdmij8-footer-brand {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 24px;
            letter-spacing: -1px;
        }

        .qdmij8-footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 32px;
            margin-bottom: 48px;
            list-style: none;
        }

        .qdmij8-footer-links a {
            color: var(--qdmij8-text-dim);
            text-decoration: none;
            font-size: 14px;
        }

        .qdmij8-copyright {
            color: rgba(255,255,255,0.3);
            font-size: 12px;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .qdmij8-nav-container {
                height: auto;
                padding: 16px;
            }
            .qdmij8-menu {
                display: none; /* 简化演示，手机端可做汉堡菜单 */
            }
            .qdmij8-title {
                font-size: 2.5rem;
            }
            .qdmij8-download-box {
                padding: 32px 16px;
            }
            .qdmij8-btn-main {
                width: 100%;
                justify-content: center;
            }
        }