:root {
            --qdmij8-primary: #3d7eff;
            --qdmij8-secondary: #a855f7;
            --qdmij8-bg: #0a0a0c;
            --qdmij8-card-bg: #16161a;
            --qdmij8-text-main: #e2e8f0;
            --qdmij8-text-dim: #94a3b8;
            --qdmij8-border: rgba(255, 255, 255, 0.1);
            --qdmij8-accent: #00f2ff;
            --qdmij8-spacing-unit: 8px;
        }

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

        body {
            background-color: var(--qdmij8-bg);
            color: var(--qdmij8-text-main);
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
            line-height: 1.6;
            overflow-x: hidden;
            word-break: break-word;
        }

        /* 导航栏设计 */
        .qdmij8-navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            background: rgba(10, 10, 12, 0.8);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--qdmij8-border);
            padding: 0 4%;
        }

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

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

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

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

        .qdmij8-nav-item a {
            text-decoration: none;
            color: var(--qdmij8-text-dim);
            font-size: 14px;
            font-weight: 500;
            transition: all 0.3s ease;
            white-space: nowrap;
            padding: 8px 4px;
            position: relative;
        }

        .qdmij8-nav-item a:hover {
            color: var(--qdmij8-primary);
        }

        .qdmij8-nav-item.active a {
            color: var(--qdmij8-text-main);
        }

        .qdmij8-nav-item.active a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--qdmij8-primary);
            box-shadow: 0 0 10px var(--qdmij8-primary);
        }

        /* Hero 非对称布局 */
        .qdmij8-hero {
            padding: 160px 4% 80px;
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            min-height: 80vh;
        }

        .qdmij8-hero-content {
            flex: 1 1 500px;
            min-width: 0;
            padding-right: 48px;
        }

        .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(135deg, #fff 30%, var(--qdmij8-primary));
            -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: 40px;
        }

        .qdmij8-hero-visual {
            flex: 1 1 400px;
            min-width: 0;
            position: relative;
            display: flex;
            justify-content: center;
        }

        .qdmij8-code-window {
            background: #010101;
            border: 1px solid var(--qdmij8-border);
            border-radius: 16px;
            width: 100%;
            max-width: 600px;
            padding: 24px;
            box-shadow: 0 20px 50px rgba(0,0,0,0.5), 0 0 20px rgba(61, 126, 255, 0.1);
            transform: perspective(1000px) rotateY(-5deg) rotateX(5deg);
            transition: transform 0.5s ease;
        }

        .qdmij8-code-window:hover {
            transform: perspective(1000px) rotateY(0deg) rotateX(0deg);
        }

        .qdmij8-code-dot {
            display: inline-block;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            margin-right: 8px;
            background: #ff5f56;
        }
        .qdmij8-code-dot:nth-child(2) { background: #ffbd2e; }
        .qdmij8-code-dot:nth-child(3) { background: #27c93f; }

        .qdmij8-code-content {
            margin-top: 20px;
            font-family: 'Fira Code', monospace;
            color: var(--qdmij8-accent);
            font-size: 14px;
        }

        /* 教程核心区块 */
        .qdmij8-tutorial-section {
            padding: 80px 4%;
            max-width: 1300px;
            margin: 0 auto;
        }

        .qdmij8-section-label {
            display: inline-block;
            padding: 4px 12px;
            background: rgba(61, 126, 255, 0.1);
            color: var(--qdmij8-primary);
            border-radius: 20px;
            font-size: 12px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 16px;
        }

        .qdmij8-tutorial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 32px;
            margin-top: 48px;
        }

        .qdmij8-tutorial-card {
            background: var(--qdmij8-card-bg);
            border: 1px solid var(--qdmij8-border);
            border-radius: 24px;
            padding: 40px;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            position: relative;
            overflow: hidden;
        }

        .qdmij8-tutorial-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--qdmij8-primary);
            opacity: 0;
            transition: opacity 0.3s;
        }

        .qdmij8-tutorial-card:hover {
            transform: translateY(-8px);
            border-color: var(--qdmij8-primary);
            box-shadow: 0 10px 30px rgba(0,0,0,0.3);
        }

        .qdmij8-tutorial-card:hover::before {
            opacity: 1;
        }

        .qdmij8-step-number {
            font-size: 48px;
            font-weight: 900;
            color: rgba(255, 255, 255, 0.05);
            position: absolute;
            top: 20px;
            right: 20px;
        }

        .qdmij8-tutorial-card h3 {
            font-size: 24px;
            margin-bottom: 16px;
            color: #fff;
        }

        .qdmij8-tutorial-card p {
            color: var(--qdmij8-text-dim);
            font-size: 16px;
            line-height: 1.7;
        }

        /* 核心创新柱状展示 */
        .qdmij8-pillars {
            padding: 100px 4%;
            background: linear-gradient(to bottom, transparent, rgba(61, 126, 255, 0.03));
        }

        .qdmij8-pillars-inner {
            max-width: 1400px;
            margin: 0 auto;
        }

        .qdmij8-pillar-item {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            margin-bottom: 96px;
            gap: 48px;
        }

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

        .qdmij8-pillar-text {
            flex: 1 1 450px;
            min-width: 0;
        }

        .qdmij8-pillar-visual {
            flex: 1 1 450px;
            min-width: 0;
            height: 300px;
            background: radial-gradient(circle at center, rgba(61, 126, 255, 0.15) 0%, transparent 70%);
            border-radius: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px dashed var(--qdmij8-border);
        }

        .qdmij8-tag-group {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin: 16px 0;
        }

        .qdmij8-tag {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid var(--qdmij8-border);
            padding: 4px 12px;
            border-radius: 6px;
            font-size: 12px;
            color: var(--qdmij8-accent);
        }

        .qdmij8-metric {
            font-size: 14px;
            color: var(--qdmij8-primary);
            font-weight: 600;
            margin-top: 20px;
        }

        /* 资讯区块 */
        .qdmij8-dynamic-section {
            padding: 80px 4%;
            max-width: 1400px;
            margin: 0 auto;
        }

        /* 页脚设计 */
        .qdmij8-footer {
            border-top: 1px solid var(--qdmij8-border);
            padding: 80px 4% 40px;
            background: #050507;
        }

        .qdmij8-footer-grid {
            max-width: 1400px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 48px;
            margin-bottom: 64px;
        }

        .qdmij8-footer-brand h2 {
            font-size: 24px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -1px;
        }

        .qdmij8-footer-links h4 {
            margin-bottom: 24px;
            font-size: 16px;
            color: #fff;
        }

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

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

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

        .qdmij8-footer-links a:hover {
            color: var(--qdmij8-primary);
        }

        .qdmij8-copyright {
            max-width: 1400px;
            margin: 0 auto;
            padding-top: 40px;
            border-top: 1px solid var(--qdmij8-border);
            text-align: center;
            font-size: 12px;
            color: var(--qdmij8-text-dim);
        }

        /* 响应式调整 */
        @media (max-width: 768px) {
            .qdmij8-nav-menu {
                display: none; /* 简化演示：移动端通常会有汉堡菜单 */
            }
            .qdmij8-hero {
                padding-top: 120px;
                text-align: center;
            }
            .qdmij8-hero-content {
                padding-right: 0;
            }
            .qdmij8-hero-subtitle {
                margin: 0 auto 40px;
            }
            .qdmij8-pillar-item {
                margin-bottom: 64px;
            }
            .qdmij8-tutorial-card {
                padding: 30px;
            }
        }

        /* 装饰用SVG背景效果 */
        .qdmij8-bg-glow {
            position: absolute;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(61, 126, 255, 0.08) 0%, transparent 70%);
            top: -200px;
            right: -100px;
            z-index: -1;
            pointer-events: none;
        }