:root {
            --qdmij8-bg: #0a0a0a;
            --qdmij8-surface: #141414;
            --qdmij8-accent: #3d7eff;
            --qdmij8-accent-glow: rgba(61, 126, 255, 0.3);
            --qdmij8-text-primary: #ededed;
            --qdmij8-text-secondary: #a0a0a0;
            --qdmij8-border: rgba(255, 255, 255, 0.1);
            --qdmij8-container-width: 1100px;
        }

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

        body {
            background-color: var(--qdmij8-bg);
            color: var(--qdmij8-text-primary);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            line-height: 1.7;
            overflow-x: hidden;
            word-break: break-word;
        }

        /* 导航栏 */
        .qdmij8-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(10, 10, 10, 0.8);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--qdmij8-border);
        }

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

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

        .qdmij8-logo img {
            height: 32px;
            width: auto;
            border-radius: 6px;
        }

        .qdmij8-nav-menu {
            display: flex;
            flex-wrap: wrap;
            list-style: none;
            gap: 16px;
            min-width: 0;
        }

        .qdmij8-nav-link {
            color: var(--qdmij8-text-secondary);
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s ease;
            padding: 8px 4px;
            white-space: nowrap;
        }

        .qdmij8-nav-link:hover, .qdmij8-nav-link.active {
            color: var(--qdmij8-accent);
        }

        /* Hero 区域 */
        .qdmij8-hero {
            padding: 160px 24px 80px;
            text-align: center;
            background: radial-gradient(circle at 50% 30%, var(--qdmij8-accent-glow) 0%, transparent 70%);
        }

        .qdmij8-hero-inner {
            max-width: 900px;
            margin: 0 auto;
        }

        .qdmij8-badge {
            display: inline-block;
            padding: 6px 16px;
            background: rgba(61, 126, 255, 0.1);
            border: 1px solid var(--qdmij8-accent);
            color: var(--qdmij8-accent);
            border-radius: 100px;
            font-size: 13px;
            margin-bottom: 24px;
            font-weight: 600;
        }

        .qdmij8-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            letter-spacing: -0.02em;
            color: #fff;
        }

        .qdmij8-hero-subtitle {
            font-size: clamp(1.1rem, 1vw + 0.8rem, 1.4rem);
            color: var(--qdmij8-text-secondary);
            max-width: 700px;
            margin: 0 auto 48px;
        }

        /* 下载网格 */
        .qdmij8-download-section {
            padding: 40px 24px;
            max-width: var(--qdmij8-container-width);
            margin: 0 auto;
        }

        .qdmij8-download-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
            margin-bottom: 64px;
        }

        .qdmij8-download-card {
            background: var(--qdmij8-surface);
            border: 1px solid var(--qdmij8-border);
            border-radius: 20px;
            padding: 40px;
            text-align: center;
            transition: transform 0.3s ease, border-color 0.3s ease;
            display: flex;
            flex-direction: column;
            align-items: center;
            min-width: 0;
        }

        .qdmij8-download-card:hover {
            transform: translateY(-8px);
            border-color: var(--qdmij8-accent);
            box-shadow: 0 20px 40px rgba(0,0,0,0.4);
        }

        .qdmij8-os-icon {
            font-size: 48px;
            margin-bottom: 24px;
            opacity: 0.9;
        }

        .qdmij8-os-name {
            font-size: 24px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .qdmij8-os-version {
            font-size: 14px;
            color: var(--qdmij8-text-secondary);
            margin-bottom: 32px;
        }

        .qdmij8-btn-download {
            display: inline-block;
            width: 100%;
            padding: 14px 28px;
            background: var(--qdmij8-accent);
            color: #fff;
            text-decoration: none;
            border-radius: 12px;
            font-weight: 600;
            transition: filter 0.3s ease;
        }

        .qdmij8-btn-download:hover {
            filter: brightness(1.1);
        }

        /* 核心特性 - 非对称流体布局 */
        .qdmij8-features-section {
            padding: 96px 24px;
            background: #0f0f0f;
        }

        .qdmij8-feature-row {
            max-width: var(--qdmij8-container-width);
            margin: 0 auto 120px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
        }

        .qdmij8-feature-row:nth-child(even) {
            flex-direction: row-reverse;
        }

        .qdmij8-feature-content {
            flex: 1;
            min-width: 300px;
        }

        .qdmij8-feature-visual {
            flex: 1.2;
            min-width: 300px;
            background: var(--qdmij8-surface);
            border-radius: 16px;
            padding: 24px;
            border: 1px solid var(--qdmij8-border);
            box-shadow: 0 30px 60px rgba(0,0,0,0.5);
        }

        .qdmij8-code-snippet {
            font-family: "Fira Code", monospace;
            font-size: 14px;
            color: #888;
            line-height: 1.5;
        }

        .qdmij8-feature-tag {
            color: var(--qdmij8-accent);
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            margin-bottom: 16px;
            display: block;
        }

        .qdmij8-feature-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 20px;
        }

        .qdmij8-feature-desc {
            color: var(--qdmij8-text-secondary);
            margin-bottom: 24px;
        }

        .qdmij8-capability-list {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .qdmij8-cap-tag {
            padding: 4px 12px;
            background: rgba(255,255,255,0.05);
            border-radius: 6px;
            font-size: 13px;
            color: #ccc;
        }

        .qdmij8-metric {
            margin-top: 32px;
            padding-top: 24px;
            border-top: 1px solid var(--qdmij8-border);
            font-weight: 600;
            color: var(--qdmij8-accent);
        }

        /* 底部 */
        .qdmij8-footer {
            padding: 80px 24px;
            border-top: 1px solid var(--qdmij8-border);
            background: var(--qdmij8-bg);
        }

        .qdmij8-footer-inner {
            max-width: var(--qdmij8-container-width);
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 48px;
        }

        .qdmij8-footer-brand {
            flex: 1;
            min-width: 240px;
        }

        .qdmij8-brand-name {
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .qdmij8-footer-links {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 40px;
            flex: 2;
        }

        .qdmij8-footer-list {
            list-style: none;
        }

        .qdmij8-footer-list li {
            margin-bottom: 12px;
        }

        .qdmij8-footer-list a {
            color: var(--qdmij8-text-secondary);
            text-decoration: none;
            font-size: 14px;
            transition: color 0.3s ease;
        }

        .qdmij8-footer-list a:hover {
            color: #fff;
        }

        .qdmij8-copyright {
            margin-top: 64px;
            text-align: center;
            color: #444;
            font-size: 13px;
            width: 100%;
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .qdmij8-nav-container {
                height: auto;
                padding: 16px;
            }
            .qdmij8-nav-menu {
                margin-top: 16px;
                justify-content: center;
            }
            .qdmij8-hero {
                padding-top: 120px;
            }
            .qdmij8-feature-row {
                margin-bottom: 64px;
                gap: 32px;
            }
            .qdmij8-footer-links {
                grid-template-columns: 1fr;
            }
        }

        /* 结构化数据 */