:root {
            --primary: rgb(14,116,144);
            --primary-hover: rgb(12,98,122);
            --primary-light: rgba(14,116,144,0.1);
            --bg-body: #f8fafc;
            --bg-white: #ffffff;
            --text-main: #0f172a;
            --text-desc: #475569;
            --text-light: #94a3b8;
            --border-color: #e2e8f0;
            --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
            --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
            --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
            --radius-md: 8px;
            --radius-lg: 12px;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif; background-color: var(--bg-body); color: var(--text-main); line-height: 1.6; -webkit-font-smoothing: antialiased; }
        a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
        ul { list-style: none; }
        img { max-width: 100%; height: auto; display: block; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        
        .header { background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border-color); position: fixed; top: 0; left: 0; right: 0; z-index: 1000; transition: box-shadow 0.3s; }
        .header.scrolled { box-shadow: var(--shadow-sm); }
        .nav-wrap { height: 80px; display: flex; align-items: center; justify-content: space-between; }
        .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(--text-main); white-space: nowrap; }
        .desktop-nav { display: flex; gap: 30px; align-items: center; }
        .desktop-nav a { font-size: 16px; font-weight: 500; color: var(--text-desc); position: relative; }
        .desktop-nav a:hover { color: var(--primary); }
        .desktop-nav a::after { content: ''; position: absolute; bottom: -6px; left: 50%; transform: translateX(-50%); width: 0; height: 2px; background: var(--primary); transition: width 0.3s; }
        .desktop-nav a:hover::after { width: 100%; }
        .header-actions { display: flex; align-items: center; gap: 15px; }
        .btn { display: inline-flex; align-items: center; justify-content: center; padding: 10px 24px; font-size: 16px; font-weight: 600; border-radius: var(--radius-md); cursor: pointer; transition: all 0.3s; }
        .btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 14px 0 rgba(14,116,144,0.39); }
        .btn-primary:hover { background: var(--primary-hover); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(14,116,144,0.4); }
        .btn-outline { border: 1px solid var(--primary); color: var(--primary); background: transparent; }
        .btn-outline:hover { background: var(--primary); color: #fff; }
        .menu-toggle { display: none; background: none; border: none; cursor: pointer; padding: 5px; }
        .menu-toggle svg { width: 28px; height: 28px; fill: var(--text-main); }

        
        .drawer-overlay { position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.5); z-index: 1001; opacity: 0; visibility: hidden; transition: all 0.3s; }
        .drawer-overlay.active { opacity: 1; visibility: visible; }
        .drawer { position: fixed; top: 0; left: -300px; width: 280px; height: 100%; background: #fff; z-index: 1002; transition: left 0.3s cubic-bezier(0.4, 0, 0.2, 1); display: flex; flex-direction: column; box-shadow: var(--shadow-lg); }
        .drawer.active { left: 0; }
        .drawer-header { padding: 20px; border-bottom: 1px solid var(--border-color); display: flex; justify-content: space-between; align-items: center; }
        .drawer-close { background: none; border: none; cursor: pointer; padding: 5px; }
        .drawer-close svg { width: 24px; height: 24px; fill: var(--text-desc); }
        .drawer-nav { padding: 20px 0; overflow-y: auto; flex: 1; }
        .drawer-nav a { display: block; padding: 12px 20px; font-size: 16px; color: var(--text-main); font-weight: 500; border-left: 3px solid transparent; }
        .drawer-nav a:hover { background: var(--bg-body); color: var(--primary); border-left-color: var(--primary); }

        
        .hero { padding: 160px 0 100px; background: linear-gradient(135deg, #f0f9ff 0%, #ffffff 100%); position: relative; overflow: hidden; }
        .hero::before { content: ''; position: absolute; top: -10%; right: -5%; width: 500px; height: 500px; background: radial-gradient(circle, rgba(14,116,144,0.08) 0%, rgba(255,255,255,0) 70%); border-radius: 50%; }
        .hero-container { display: flex; align-items: center; gap: 60px; position: relative; z-index: 1; }
        .hero-content { flex: 1; }
        .hero-tag { display: inline-block; padding: 6px 16px; background: var(--primary-light); color: var(--primary); font-size: 14px; font-weight: 600; border-radius: 30px; margin-bottom: 20px; }
        .hero-title { font-size: 48px; font-weight: 800; color: var(--text-main); line-height: 1.2; margin-bottom: 24px; }
        .hero-title span { color: var(--primary); }
        .hero-desc { font-size: 18px; color: var(--text-desc); margin-bottom: 40px; max-width: 90%; }
        .hero-actions { display: flex; gap: 20px; }
        .hero-image { flex: 1; text-align: center; position: relative; }
        .hero-image img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); transform: perspective(1000px) rotateY(-5deg); transition: transform 0.5s; }
        .hero-image:hover img { transform: perspective(1000px) rotateY(0deg); }

        
        .stats-section { padding: 40px 0; background: #fff; border-bottom: 1px solid var(--border-color); }
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; text-align: center; }
        .stat-item h4 { font-size: 36px; font-weight: 800; color: var(--primary); margin-bottom: 8px; }
        .stat-item p { font-size: 15px; color: var(--text-desc); }

        
        .section { padding: 100px 0; }
        .section-header { text-align: center; margin-bottom: 60px; }
        .section-title { font-size: 36px; font-weight: 800; margin-bottom: 16px; }
        .section-desc { font-size: 16px; color: var(--text-desc); max-width: 600px; margin: 0 auto; }
        .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .feature-card { background: #fff; padding: 40px 30px; border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); transition: all 0.3s; border: 1px solid transparent; }
        .feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: var(--primary-light); }
        .icon-box { width: 60px; height: 60px; background: var(--primary-light); border-radius: 16px; display: flex; align-items: center; justify-content: center; margin-bottom: 24px; }
        .icon-box svg { width: 30px; height: 30px; fill: var(--primary); }
        .feature-title { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
        .feature-desc { color: var(--text-desc); font-size: 15px; }

        
        .about-block { background: #fff; padding: 100px 0; }
        .about-wrap { display: flex; align-items: center; gap: 60px; }
        .about-img { flex: 1; border-radius: var(--radius-lg); overflow: hidden; position: relative; }
        .about-img::after { content:''; position:absolute; inset:0; background: linear-gradient(to top, rgba(14,116,144,0.2), transparent); }
        .about-text { flex: 1; }
        .about-list { margin-top: 30px; }
        .about-list li { display: flex; align-items: flex-start; gap: 15px; margin-bottom: 20px; }
        .about-list-icon { margin-top: 4px; color: var(--primary); }

        
        .article-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .article-card { background: #fff; border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); transition: all 0.3s; display: flex; flex-direction: column; }
        .article-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
        .article-img { width: 100%; height: 180px; object-fit: cover; }
        .article-content { padding: 20px; flex: 1; display: flex; flex-direction: column; }
        .article-meta { display: flex; justify-content: space-between; font-size: 12px; color: var(--text-light); margin-bottom: 10px; }
        .article-title { font-size: 18px; font-weight: 700; color: var(--text-main); 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-desc); margin-bottom: 15px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; flex: 1; }
        .article-tags { display: flex; gap: 8px; margin-bottom: 15px; flex-wrap: wrap; }
        .article-tag { font-size: 12px; background: var(--bg-body); color: var(--primary); padding: 4px 8px; border-radius: 4px; }
        .article-read { margin-top: auto; font-size: 14px; font-weight: 600; color: var(--primary); display: flex; align-items: center; gap: 5px; }

        
        .cta-section { padding: 80px 0; background: var(--primary); color: #fff; text-align: center; }
        .cta-title { font-size: 36px; font-weight: 800; margin-bottom: 20px; }
        .cta-desc { font-size: 18px; opacity: 0.9; margin-bottom: 40px; max-width: 600px; margin-left: auto; margin-right: auto; }
        .cta-btn { background: #fff; color: var(--primary); }
        .cta-btn:hover { background: var(--bg-body); transform: translateY(-2px); box-shadow: 0 4px 15px rgba(0,0,0,0.1); }

        
        .footer { background: #0f172a; color: #94a3b8; padding: 80px 0 30px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 50px; margin-bottom: 60px; }
        .footer-brand .logo span { color: #fff; }
        .footer-desc { margin-top: 20px; font-size: 14px; line-height: 1.8; }
        .footer-title { color: #fff; font-size: 18px; font-weight: 600; margin-bottom: 24px; }
        .footer-links li { margin-bottom: 12px; }
        .footer-links a { font-size: 14px; }
        .footer-links a:hover { color: #fff; }
        .footer-bottom { border-top: 1px solid #1e293b; padding-top: 30px; display: flex; justify-content: space-between; align-items: center; font-size: 14px; }
        .footer-bottom-links { display: flex; gap: 20px; }

        @media (max-width: 1024px) {
            .hero-container { flex-direction: column; text-align: center; }
            .hero-actions { justify-content: center; }
            .hero-desc { margin: 0 auto 40px; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
            .feature-grid { grid-template-columns: repeat(2, 1fr); }
            .about-wrap { flex-direction: column; }
            .article-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .desktop-nav, .header-actions { display: none; }
            .menu-toggle { display: block; }
            .hero { padding: 120px 0 60px; }
            .hero-title { font-size: 32px; }
            .feature-grid, .article-grid, .stats-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 30px; }
            .footer-bottom { flex-direction: column; gap: 15px; text-align: center; }
        }