:root {
            --primary: rgb(67,56,202);
            --primary-hover: rgb(55,46,180);
            --primary-light: rgba(67,56,202, 0.05);
            --text-dark: #1e293b;
            --text-main: #334155;
            --text-muted: #64748b;
            --bg-body: #f8fafc;
            --bg-white: #ffffff;
            --border-color: #e2e8f0;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
            --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
            --radius: 8px;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif; background: var(--bg-body); color: var(--text-main); line-height: 1.6; }
        a { text-decoration: none; color: inherit; transition: all 0.3s; }
        img { max-width: 100%; height: auto; display: block; }
        ul { list-style: none; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        
        .site-header { background: var(--bg-white); box-shadow: var(--shadow-sm); position: sticky; top: 0; z-index: 100; }
        .header-inner { display: flex; align-items: center; justify-content: space-between; height: 70px; }
        .logo { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
        .logo img { display: block; height: 40px; width: auto; max-width: 160px; object-fit: contain; flex-shrink: 0; }
        .logo span { display: inline-block; font-size: 20px; font-weight: 800; line-height: 1; color: var(--primary); white-space: nowrap; }
        
        
        .desktop-nav { display: flex; gap: 30px; align-items: center; }
        .desktop-nav a { font-size: 16px; font-weight: 500; color: var(--text-dark); position: relative; }
        .desktop-nav a:hover { color: var(--primary); }
        .desktop-nav a::after { content: ''; position: absolute; bottom: -5px; left: 0; width: 0; height: 2px; background: var(--primary); transition: width 0.3s; }
        .desktop-nav a:hover::after { width: 100%; }
        
        
        .mobile-toggle { display: none; font-size: 24px; cursor: pointer; color: var(--text-dark); }
        
        
        .drawer-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 999; opacity: 0; visibility: hidden; transition: all 0.3s; }
        .drawer-overlay.active { opacity: 1; visibility: visible; }
        .drawer { position: fixed; top: 0; left: 0; bottom: 0; width: 280px; background: var(--bg-white); z-index: 1000; transform: translateX(-100%); transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1); display: flex; flex-direction: column; }
        .drawer.active { transform: translateX(0); }
        .drawer-header { padding: 20px; border-bottom: 1px solid var(--border-color); display: flex; justify-content: space-between; align-items: center; }
        .drawer-close { font-size: 24px; cursor: pointer; color: var(--text-muted); line-height: 1; }
        .drawer-nav { padding: 20px; overflow-y: auto; flex: 1; }
        .drawer-nav a { display: block; padding: 12px 0; font-size: 16px; color: var(--text-dark); border-bottom: 1px solid var(--primary-light); }
        
        
        .btn { display: inline-block; padding: 12px 28px; border-radius: 30px; font-weight: 600; text-align: center; cursor: pointer; transition: all 0.3s; }
        .btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(67,56,202,0.4); }
        .btn-primary:hover { background: var(--primary-hover); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(67,56,202,0.6); }
        .btn-outline { border: 2px solid var(--primary); color: var(--primary); background: transparent; }
        .btn-outline:hover { background: var(--primary-light); }
        
        
        .hero { background: linear-gradient(135deg, rgba(15,23,42,0.9), rgba(67,56,202,0.8)), url('https://images.unsplash.com/photo-1518133910546-b6c2fb7d79e3?auto=format&fit=crop&w=1920&q=80') center/cover; color: #fff; padding: 120px 0; position: relative; overflow: hidden; }
        .hero-inner { display: flex; flex-wrap: wrap; align-items: center; gap: 40px; }
        .hero-content { flex: 1; min-width: 300px; z-index: 2; }
        .hero-title { font-size: 48px; font-weight: 800; margin-bottom: 20px; line-height: 1.2; }
        .hero-desc { font-size: 18px; opacity: 0.9; margin-bottom: 40px; max-width: 600px; }
        .hero-actions { display: flex; gap: 20px; }
        .hero-visual { flex: 1; min-width: 300px; text-align: center; position: relative; z-index: 2; }
        .hero-visual img { max-width: 100%; border-radius: 20px; box-shadow: 0 20px 40px rgba(0,0,0,0.3); animation: float 6s ease-in-out infinite; }
        @keyframes float { 0% { transform: translateY(0); } 50% { transform: translateY(-20px); } 100% { transform: translateY(0); } }
        
        
        .stats { background: var(--bg-white); padding: 40px 0; border-bottom: 1px solid var(--border-color); }
        .stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 30px; text-align: center; }
        .stat-item h3 { font-size: 32px; color: var(--primary); font-weight: 800; margin-bottom: 5px; }
        .stat-item p { font-size: 15px; color: var(--text-muted); font-weight: 500; }
        
        
        .section { padding: 80px 0; }
        .section-header { text-align: center; margin-bottom: 50px; }
        .section-title { font-size: 32px; color: var(--text-dark); margin-bottom: 15px; }
        .section-desc { font-size: 16px; color: var(--text-muted); max-width: 600px; margin: 0 auto; }
        .features-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 30px; }
        .feature-card { background: var(--bg-white); border-radius: var(--radius); padding: 40px 30px; text-align: center; box-shadow: var(--shadow-sm); transition: all 0.3s; border: 1px solid var(--primary-light); }
        .feature-card:hover { transform: translateY(-10px); box-shadow: var(--shadow-lg); border-color: var(--primary); }
        .feature-icon { width: 80px; height: 80px; margin: 0 auto 20px; background: var(--primary-light); border-radius: 50%; display: flex; align-items: center; justify-content: center; }
        .feature-icon img { width: 40px; height: 40px; }
        .feature-title { font-size: 20px; font-weight: 700; margin-bottom: 15px; color: var(--text-dark); }
        .feature-text { color: var(--text-muted); font-size: 14px; }
        
        
        .app-section { background: var(--bg-white); padding: 80px 0; }
        .app-inner { display: flex; flex-wrap: wrap; align-items: center; gap: 60px; background: var(--primary-light); border-radius: 20px; padding: 60px; }
        .app-content { flex: 1; min-width: 300px; }
        .app-visual { flex: 1; min-width: 300px; text-align: center; }
        .app-visual img { max-width: 80%; margin: 0 auto; filter: drop-shadow(0 20px 30px rgba(0,0,0,0.15)); }
        
        
        .article-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 30px; }
        .article-card { background: var(--bg-white); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); transition: transform 0.3s; display: flex; flex-direction: column; }
        .article-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
        .article-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
        .article-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
        .article-meta { display: flex; justify-content: space-between; font-size: 12px; color: var(--text-muted); margin-bottom: 10px; }
        .article-title { font-size: 18px; font-weight: 700; color: var(--text-dark); margin-bottom: 10px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .article-desc { font-size: 14px; color: var(--text-muted); margin-bottom: 15px; flex: 1; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
        .article-footer { display: flex; justify-content: space-between; align-items: center; border-top: 1px solid var(--border-color); padding-top: 15px; margin-top: auto; }
        .article-tags { font-size: 12px; color: var(--primary); background: var(--primary-light); padding: 4px 10px; border-radius: 12px; }
        .article-read { font-size: 14px; color: var(--primary); font-weight: 600; }
        
        
        .site-footer { background: #0f172a; color: #cbd5e1; padding: 60px 0 30px; margin-top: 60px; }
        .footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); gap: 40px; margin-bottom: 40px; }
        .footer-logo .logo span { color: #fff; }
        .footer-desc { margin-top: 20px; font-size: 14px; color: #94a3b8; }
        .footer-title { font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 20px; }
        .footer-nav li { margin-bottom: 10px; }
        .footer-nav a { color: #94a3b8; font-size: 14px; }
        .footer-nav a:hover { color: var(--primary); }
        .footer-bottom { border-top: 1px solid #334155; padding-top: 30px; text-align: center; font-size: 14px; color: #64748b; display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; }
        .footer-links a { margin: 0 10px; }
        
        @media (max-width: 768px) {
            .desktop-nav { display: none; }
            .mobile-toggle { display: block; }
            .hero-title { font-size: 32px; }
            .app-inner { padding: 30px; }
            .footer-bottom { flex-direction: column; gap: 15px; }
        }