:root {
            --qdmij8-primary: #3D7BFF;
            --qdmij8-bg-dark: #0A0A0A;
            --qdmij8-bg-card: #161616;
            --qdmij8-text-main: #E0E0E0;
            --qdmij8-text-dim: #A0A0A0;
            --qdmij8-accent: #00F2FF;
            --qdmij8-spacing-unit: 8px;
        }

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

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

        /* 导航系统 */
        .qdmij8-header {
            position: fixed;
            top: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(10, 10, 10, 0.8);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .qdmij8-nav-container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 32px;
            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: 6px;
        }

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

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

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

        /* Hero 区布局 - 非对称流体布局 */
        .qdmij8-hero {
            padding: 180px 32px 100px;
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            align-items: center;
        }

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

        .qdmij8-hero-tag {
            background: rgba(61, 123, 255, 0.1);
            color: var(--qdmij8-primary);
            padding: 6px 16px;
            border-radius: 100px;
            font-size: 13px;
            display: inline-block;
            margin-bottom: 24px;
            border: 1px solid rgba(61, 123, 255, 0.2);
        }

        .qdmij8-hero-title {
            font-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
            line-height: 1.1;
            font-weight: 800;
            margin-bottom: 32px;
            background: linear-gradient(135deg, #FFF 0%, #AAA 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .qdmij8-hero-subtitle {
            font-size: clamp(1.1rem, 1.5vw + 0.5rem, 1.4rem);
            color: var(--qdmij8-text-dim);
            max-width: 600px;
            margin-bottom: 48px;
        }

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

        .qdmij8-code-window {
            background: #000;
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 16px;
            padding: 24px;
            box-shadow: 0 40px 100px rgba(0,0,0,0.5);
            font-family: 'Fira Code', monospace;
            position: relative;
            overflow: hidden;
        }

        .qdmij8-code-window::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 40px;
            background: rgba(255, 255, 255, 0.03);
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }

        .qdmij8-code-line {
            display: block;
            margin-bottom: 8px;
            font-size: 14px;
        }

        .qdmij8-python-keyword { color: #C678DD; }
        .qdmij8-python-func { color: #61AFEF; }
        .qdmij8-python-str { color: #98C379; }
        .qdmij8-ai-prediction {
            color: var(--qdmij8-primary);
            border-bottom: 2px solid var(--qdmij8-primary);
            opacity: 0.8;
        }

        /* 核心支柱区块 */
        .qdmij8-pillars {
            max-width: 1400px;
            margin: 0 auto;
            padding: 100px 32px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
            gap: 32px;
        }

        .qdmij8-pillar-card {
            background: var(--qdmij8-bg-card);
            padding: 48px;
            border-radius: 24px;
            border: 1px solid rgba(255, 255, 255, 0.05);
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .qdmij8-pillar-card:hover {
            transform: translateY(-12px);
            border-color: var(--qdmij8-primary);
            box-shadow: 0 20px 40px rgba(61, 123, 255, 0.1);
        }

        .qdmij8-pillar-icon {
            font-size: 32px;
            width: 64px;
            height: 64px;
            background: rgba(255,255,255,0.03);
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 16px;
            color: var(--qdmij8-primary);
        }

        .qdmij8-pillar-title {
            font-size: 24px;
            font-weight: 700;
        }

        .qdmij8-pillar-desc {
            color: var(--qdmij8-text-dim);
            font-size: 16px;
        }

        .qdmij8-tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: auto;
        }

        .qdmij8-capability-tag {
            background: rgba(255, 255, 255, 0.05);
            padding: 4px 12px;
            border-radius: 6px;
            font-size: 12px;
            color: var(--qdmij8-text-main);
        }

        /* 技术深度区块 - 垂直阅读律动 */
        .qdmij8-tech-section {
            padding: 100px 32px;
            max-width: 1100px;
            margin: 0 auto;
        }

        .qdmij8-tech-row {
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
            margin-bottom: 120px;
            align-items: flex-start;
        }

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

        .qdmij8-tech-info {
            flex: 1;
            min-width: 300px;
        }

        .qdmij8-tech-visual {
            flex: 1;
            min-width: 300px;
            background: linear-gradient(45deg, #1e1e1e, #111);
            border-radius: 20px;
            padding: 32px;
            border-left: 4px solid var(--qdmij8-primary);
        }

        .qdmij8-metric {
            font-size: 48px;
            font-weight: 800;
            color: var(--qdmij8-accent);
            margin-top: 24px;
            display: block;
        }

        /* 底部 CTA */
        .qdmij8-cta {
            background: linear-gradient(to bottom, #0A0A0A, #111);
            padding: 120px 32px;
            text-align: center;
        }

        .qdmij8-cta-inner {
            max-width: 800px;
            margin: 0 auto;
        }

        .qdmij8-button {
            display: inline-block;
            padding: 18px 48px;
            background: var(--qdmij8-primary);
            color: white;
            text-decoration: none;
            border-radius: 12px;
            font-weight: 700;
            font-size: 18px;
            transition: all 0.3s ease;
            box-shadow: 0 10px 30px rgba(61, 123, 255, 0.3);
        }

        .qdmij8-button:hover {
            transform: scale(1.05);
            background: #508CFF;
            box-shadow: 0 15px 40px rgba(61, 123, 255, 0.4);
        }

        /* 页脚 */
        .qdmij8-footer {
            padding: 80px 32px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            max-width: 1400px;
            margin: 0 auto;
        }

        .qdmij8-footer-grid {
            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;
            color: white;
        }

        .qdmij8-footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 64px;
        }

        .qdmij8-footer-col h4 {
            margin-bottom: 24px;
            font-size: 14px;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--qdmij8-primary);
        }

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

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

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

        .qdmij8-footer-col a:hover {
            color: white;
        }

        @media (max-width: 768px) {
            .qdmij8-nav-links {
                display: none; /* 简化移动端，实际可加菜单按钮 */
            }
            .qdmij8-hero {
                padding-top: 120px;
                text-align: center;
            }
            .qdmij8-hero-subtitle {
                margin-left: auto;
                margin-right: auto;
            }
            .qdmij8-tech-row, .qdmij8-tech-row:nth-child(even) {
                flex-direction: column;
            }
        }