:root {
            --qdmij8-bg: #0A0A0A;
            --qdmij8-surface: #141414;
            --qdmij8-accent: #3E7BFA;
            --qdmij8-accent-gradient: linear-gradient(135deg, #3E7BFA 0%, #66D9EF 100%);
            --qdmij8-text-main: #E0E0E0;
            --qdmij8-text-dim: #A0A0A0;
            --qdmij8-border: rgba(255, 255, 255, 0.1);
            --qdmij8-font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
        }

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

        body {
            background-color: var(--qdmij8-bg);
            color: var(--qdmij8-text-main);
            font-family: var(--qdmij8-font-sans);
            line-height: 1.6;
            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: 1400px;
            margin: 0 auto;
            padding: 0 48px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
            flex-wrap: wrap;
        }

        .qdmij8-logo {
            flex-shrink: 0;
            min-width: 0;
        }

        .qdmij8-logo img {
            height: 32px;
            display: block;
        }

        .qdmij8-nav-menu {
            display: flex;
            gap: 20px;
            list-style: none;
            flex-wrap: wrap;
            min-width: 0;
        }

        .qdmij8-nav-menu li {
            min-width: 0;
        }

        .qdmij8-nav-menu a {
            text-decoration: none;
            color: var(--qdmij8-text-dim);
            font-size: 14px;
            font-weight: 500;
            transition: color 0.3s ease;
            white-space: nowrap;
        }

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

        /* Hero 区域 - 非对称布局 */
        .qdmij8-hero {
            padding: 180px 48px 100px;
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 64px;
        }

        .qdmij8-hero-content {
            flex: 1;
            min-width: 320px;
        }

        .qdmij8-hero-visual {
            flex: 1.2;
            min-width: 320px;
            position: relative;
        }

        .qdmij8-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 24px;
            background: linear-gradient(to right, #fff, #888);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .qdmij8-hero-subtitle {
            font-size: clamp(1.1rem, 1vw + 0.5rem, 1.4rem);
            color: var(--qdmij8-text-dim);
            margin-bottom: 40px;
            max-width: 600px;
        }

        .qdmij8-btn {
            display: inline-block;
            padding: 16px 32px;
            background: var(--qdmij8-accent-gradient);
            color: white;
            text-decoration: none;
            border-radius: 8px;
            font-weight: 600;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            box-shadow: 0 4px 20px rgba(62, 123, 250, 0.3);
        }

        .qdmij8-btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(62, 123, 250, 0.5);
        }

        /* 代码装饰背景块 */
        .qdmij8-code-window {
            background: #1E1E1E;
            border: 1px solid var(--qdmij8-border);
            border-radius: 12px;
            padding: 24px;
            font-family: 'Courier New', Courier, monospace;
            box-shadow: 0 40px 80px rgba(0,0,0,0.5);
            position: relative;
            transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
        }

        .qdmij8-code-line {
            display: block;
            height: 12px;
            background: rgba(255,255,255,0.05);
            margin-bottom: 8px;
            border-radius: 4px;
        }

        .qdmij8-code-line.short { width: 40%; }
        .qdmij8-code-line.med { width: 70%; }
        .qdmij8-code-line.long { width: 90%; }
        .qdmij8-code-line.accent { background: var(--qdmij8-accent); opacity: 0.3; }

        /* 创新支柱区块 - 流体网格 */
        .qdmij8-section {
            padding: 100px 48px;
            max-width: 1400px;
            margin: 0 auto;
        }

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

        .qdmij8-pillar-card {
            background: var(--qdmij8-surface);
            border: 1px solid var(--qdmij8-border);
            border-radius: 24px;
            padding: 40px;
            transition: border-color 0.3s ease, transform 0.3s ease;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

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

        .qdmij8-tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .qdmij8-tag {
            font-size: 12px;
            padding: 4px 12px;
            background: rgba(62, 123, 250, 0.1);
            color: var(--qdmij8-accent);
            border-radius: 20px;
            border: 1px solid rgba(62, 123, 250, 0.2);
        }

        .qdmij8-metric {
            font-size: 24px;
            font-weight: 700;
            color: #fff;
            margin-top: auto;
            padding-top: 20px;
            border-top: 1px solid var(--qdmij8-border);
        }

        .qdmij8-metric span {
            display: block;
            font-size: 14px;
            color: var(--qdmij8-text-dim);
            font-weight: 400;
        }

        /* 技术深度详情 - 交错布局 */
        .qdmij8-depth-row {
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            align-items: center;
            margin-bottom: 120px;
        }

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

        .qdmij8-depth-content {
            flex: 1;
            min-width: 320px;
        }

        .qdmij8-depth-visual {
            flex: 1;
            min-width: 320px;
            background: linear-gradient(45deg, #141414, #1a1a1a);
            height: 300px;
            border-radius: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px dashed var(--qdmij8-border);
        }

        /* 页脚 */
        .qdmij8-footer {
            border-top: 1px solid var(--qdmij8-border);
            padding: 64px 48px;
            background: #050505;
        }

        .qdmij8-footer-inner {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 32px;
        }

        .qdmij8-footer-brand {
            font-size: 24px;
            font-weight: 800;
            letter-spacing: -1px;
        }

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

        /* 响应式调整 */
        @media (max-width: 1024px) {
            .qdmij8-nav-container { padding: 0 24px; }
            .qdmij8-hero, .qdmij8-section { padding: 80px 24px; }
        }

        @media (max-width: 768px) {
            .qdmij8-nav-menu {
                display: none; /* 简化移动端，实际项目中应有汉堡菜单 */
            }
            .qdmij8-hero {
                padding-top: 120px;
                text-align: center;
            }
            .qdmij8-hero-subtitle { margin-left: auto; margin-right: auto; }
            .qdmij8-hero-visual { display: none; }
            .qdmij8-depth-row { flex-direction: column !important; gap: 32px; }
        }