:root {
            --primary: rgb(3,105,161);
            --primary-hover: rgb(2,85,130);
            --primary-light: rgba(3,105,161, 0.08);
            --text-main: #1e293b;
            --text-muted: #64748b;
            --bg-body: #f8fafc;
            --bg-white: #ffffff;
            --border-color: #e2e8f0;
            --radius: 12px;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
            --shadow-md: 0 10px 25px -5px rgba(0,0,0,0.05);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: "PingFang SC", "Microsoft YaHei", sans-serif; color: var(--text-main); background: var(--bg-body); line-height: 1.6; -webkit-font-smoothing: antialiased; }
        a { text-decoration: none; color: inherit; transition: var(--transition); }
        ul, ol { list-style: none; }
        img { max-width: 100%; height: auto; display: block; }
        .container { width: 100%; max-width: 1240px; margin: 0 auto; padding: 0 24px; }

        
        .logo { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
        .logo img { display: block; height: 44px; width: auto; max-width: 180px; object-fit: contain; flex-shrink: 0; }
        .logo span { display: inline-block; font-size: 22px; font-weight: 800; line-height: 1; color: var(--primary); white-space: nowrap; letter-spacing: 0.5px; }

        
        .site-header { background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); position: sticky; top: 0; z-index: 100; border-bottom: 1px solid rgba(226,232,240,0.8); transition: var(--transition); }
        .site-header.scrolled { box-shadow: var(--shadow-sm); }
        .header-inner { display: flex; align-items: center; justify-content: space-between; height: 80px; }
        .desktop-nav ul { display: flex; gap: 32px; }
        .desktop-nav a { font-weight: 500; font-size: 16px; color: #334155; position: relative; padding: 8px 0; }
        .desktop-nav a:hover { color: var(--primary); }
        .desktop-nav a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: var(--primary); transition: var(--transition); }
        .desktop-nav a:hover::after { width: 100%; }
        .header-actions { display: flex; align-items: center; gap: 20px; }
        
        
        .btn { display: inline-flex; align-items: center; justify-content: center; padding: 12px 28px; border-radius: 50px; font-weight: 600; cursor: pointer; transition: var(--transition); text-align: center; font-size: 15px; }
        .btn-primary { background: var(--primary); color: #fff; border: 2px solid var(--primary); box-shadow: 0 4px 14px rgba(3,105,161,0.25); }
        .btn-primary:hover { background: var(--primary-hover); border-color: var(--primary-hover); transform: translateY(-2px); color: #fff; box-shadow: 0 6px 20px rgba(3,105,161,0.35); }
        .btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
        .btn-outline:hover { background: var(--primary); color: #fff; }

        
        .mobile-toggle { display: none; background: none; border: none; flex-direction: column; gap: 6px; cursor: pointer; padding: 5px; }
        .mobile-toggle span { display: block; width: 26px; height: 2px; background: var(--text-main); transition: var(--transition); border-radius: 2px; }
        .mobile-drawer { position: fixed; inset: 0; z-index: 999; pointer-events: none; }
        .drawer-overlay { position: absolute; inset: 0; background: rgba(15,23,42,0.6); backdrop-filter: blur(4px); opacity: 0; transition: opacity 0.3s; }
        .drawer-content { position: absolute; top: 0; left: -320px; bottom: 0; width: 300px; background: #fff; transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1); display: flex; flex-direction: column; box-shadow: 4px 0 25px rgba(0,0,0,0.15); }
        .mobile-drawer.active { pointer-events: auto; }
        .mobile-drawer.active .drawer-overlay { opacity: 1; }
        .mobile-drawer.active .drawer-content { transform: translateX(320px); }
        .drawer-header { display: flex; align-items: center; justify-content: space-between; padding: 24px; border-bottom: 1px solid var(--border-color); background: #f8fafc; }
        .drawer-close { background: #e2e8f0; border: none; width: 32px; height: 32px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 20px; color: var(--text-main); cursor: pointer; transition: var(--transition); }
        .drawer-close:hover { background: #cbd5e1; }
        .drawer-nav { padding: 24px 0; flex: 1; overflow-y: auto; }
        .drawer-nav ul li a { display: block; padding: 16px 32px; font-size: 16px; font-weight: 500; border-bottom: 1px solid #f1f5f9; color: #334155; }
        .drawer-nav ul li a:hover { background: var(--primary-light); color: var(--primary); padding-left: 38px; border-left: 4px solid var(--primary); }
        .drawer-footer { padding: 24px; border-top: 1px solid var(--border-color); background: #f8fafc; }

        @media (max-width: 992px) {
            .desktop-nav, .header-actions .btn { display: none; }
            .mobile-toggle { display: flex; }
            .logo span { font-size: 18px; }
            .logo img { height: 36px; }
        }

        
        .hero-section { padding: 80px 0 100px; background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%); position: relative; overflow: hidden; }
        .hero-section::after { content: ''; position: absolute; right: -10%; top: -20%; width: 50%; height: 140%; background: radial-gradient(circle, rgba(3,105,161,0.05) 0%, transparent 70%); z-index: 0; }
        .hero-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; position: relative; z-index: 1; }
        .hero-content h1 { font-size: 48px; font-weight: 800; color: #0f172a; line-height: 1.2; margin-bottom: 24px; letter-spacing: -1px; }
        .hero-content h1 span { color: var(--primary); display: block; margin-top: 8px; }
        .hero-content p { font-size: 18px; color: #475569; margin-bottom: 40px; line-height: 1.8; max-width: 500px; }
        .hero-actions { display: flex; gap: 20px; align-items: center; }
        .hero-stats { display: flex; gap: 40px; margin-top: 50px; padding-top: 30px; border-top: 1px solid rgba(15,23,42,0.1); }
        .stat-item h4 { font-size: 28px; color: var(--primary); font-weight: 800; }
        .stat-item p { font-size: 14px; color: #64748b; margin-top: 4px; }
        .hero-visual { position: relative; perspective: 1000px; }
        .hero-img-wrap { border-radius: 20px; overflow: hidden; box-shadow: 0 25px 50px -12px rgba(3,105,161,0.25); transform: rotateY(-5deg) rotateX(5deg); transition: transform 0.5s; }
        .hero-img-wrap:hover { transform: rotateY(0) rotateX(0); }
        .hero-img-wrap img { width: 100%; height: auto; display: block; }
        
        @media (max-width: 992px) {
            .hero-grid { grid-template-columns: 1fr; text-align: center; gap: 40px; }
            .hero-content h1 { font-size: 36px; }
            .hero-content p { margin: 0 auto 30px; }
            .hero-actions { justify-content: center; }
            .hero-stats { justify-content: center; }
        }

        
        .features-section { padding: 100px 0; background: #fff; }
        .section-header { text-align: center; margin-bottom: 60px; }
        .section-header .subtitle { font-size: 14px; font-weight: 700; color: var(--primary); text-transform: uppercase; letter-spacing: 2px; display: block; margin-bottom: 10px; }
        .section-header h2 { font-size: 36px; font-weight: 800; color: #0f172a; margin-bottom: 16px; }
        .section-header p { font-size: 16px; color: var(--text-muted); max-width: 600px; margin: 0 auto; }
        
        .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 40px; }
        .feature-card { padding: 40px 30px; background: #f8fafc; border-radius: var(--radius); border: 1px solid #e2e8f0; transition: var(--transition); text-align: center; }
        .feature-card:hover { transform: translateY(-10px); background: #fff; box-shadow: var(--shadow-md); border-color: var(--primary-light); }
        .feature-icon { width: 70px; height: 70px; margin: 0 auto 24px; background: var(--primary-light); border-radius: 20px; display: flex; align-items: center; justify-content: center; color: var(--primary); }
        .feature-icon svg { width: 32px; height: 32px; }
        .feature-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 16px; color: #0f172a; }
        .feature-card p { font-size: 15px; color: var(--text-muted); line-height: 1.7; }
        
        @media (max-width: 768px) { .feature-grid { grid-template-columns: 1fr; } }

        
        .article-section { padding: 100px 0; background: var(--bg-body); }
        .article-section.alt-bg { background: #fff; }
        .article-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 30px; }
        .article-card { background: #fff; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); transition: var(--transition); border: 1px solid var(--border-color); display: flex; flex-direction: column; }
        .article-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--primary); }
        .card-img { display: block; aspect-ratio: 16/10; overflow: hidden; position: relative; background: #e2e8f0; }
        .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s ease; }
        .article-card:hover .card-img img { transform: scale(1.08); }
        .card-badge { position: absolute; top: 12px; left: 12px; background: rgba(3,105,161,0.9); color: #fff; font-size: 12px; padding: 4px 10px; border-radius: 4px; font-weight: 500; backdrop-filter: blur(4px); }
        .card-content { padding: 24px; flex: 1; display: flex; flex-direction: column; }
        .card-title { font-size: 18px; font-weight: 700; line-height: 1.4; margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; color: #0f172a; }
        .card-desc { font-size: 14px; color: var(--text-muted); margin-bottom: 20px; flex: 1; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; line-height: 1.6; }
        .card-meta { display: flex; align-items: center; justify-content: space-between; font-size: 13px; color: #94a3b8; margin-bottom: 16px; border-top: 1px solid #f1f5f9; padding-top: 16px; }
        .card-meta-item { display: flex; align-items: center; gap: 6px; }
        .card-meta-item svg { width: 14px; height: 14px; fill: currentColor; }
        .card-tags { font-size: 12px; display: flex; flex-wrap: wrap; gap: 8px; }
        .card-tags a { padding: 4px 12px; background: #f1f5f9; color: #475569; border-radius: 20px; transition: var(--transition); }
        .card-tags a:hover { background: var(--primary); color: #fff; }

        
        .hot-articles-wrap { display: grid; grid-template-columns: 1fr 2fr; gap: 30px; }
        .hot-primary { position: relative; border-radius: var(--radius); overflow: hidden; }
        .hot-primary img { width: 100%; height: 100%; object-fit: cover; min-height: 400px; }
        .hot-primary-content { position: absolute; bottom: 0; left: 0; right: 0; background: linear-gradient(transparent, rgba(15,23,42,0.9)); padding: 40px 30px 30px; color: #fff; }
        .hot-primary-content h3 { font-size: 24px; font-weight: 700; margin-bottom: 12px; color:#fff;}
        .hot-secondary-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
        @media (max-width: 992px) { .hot-articles-wrap { grid-template-columns: 1fr; } .hot-secondary-grid { grid-template-columns: 1fr; } }

        
        .cta-section { padding: 80px 0; background: var(--primary); position: relative; overflow: hidden; text-align: center; color: #fff; }
        .cta-section::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: url('https://images.unsplash.com/photo-1551288049-bebda4e38f71?auto=format&fit=crop&w=1920&q=20') center/cover; opacity: 0.1; mix-blend-mode: overlay; }
        .cta-inner { position: relative; z-index: 1; max-width: 800px; margin: 0 auto; }
        .cta-inner h2 { font-size: 40px; font-weight: 800; margin-bottom: 20px; }
        .cta-inner p { font-size: 18px; margin-bottom: 40px; opacity: 0.9; }
        .cta-inner .btn-outline { border-color: #fff; color: #fff; }
        .cta-inner .btn-outline:hover { background: #fff; color: var(--primary); }

        
        .site-footer { background: #0f172a; color: #cbd5e1; padding: 80px 0 30px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 50px; margin-bottom: 60px; }
        .site-footer .logo span { color: #fff; }
        .footer-desc { margin-top: 24px; font-size: 14px; line-height: 1.8; color: #94a3b8; }
        .footer-title { font-size: 18px; color: #fff; margin-bottom: 25px; font-weight: 600; letter-spacing: 0.5px; }
        .footer-links ul li { margin-bottom: 16px; }
        .footer-links ul li a { color: #94a3b8; transition: var(--transition); display: inline-block; }
        .footer-links ul li a:hover { color: #38bdf8; transform: translateX(5px); }
        .contact-item { margin-bottom: 16px; display: flex; gap: 12px; font-size: 14px; align-items: flex-start; }
        .contact-item span:first-child { color: #94a3b8; white-space: nowrap; font-weight: 500; }
        .footer-bottom { padding-top: 30px; border-top: 1px solid rgba(255,255,255,0.1); text-align: center; font-size: 14px; color: #64748b; display: flex; flex-direction: column; gap: 10px; align-items: center; }
        .footer-bottom a { color: #94a3b8; }
        .footer-bottom a:hover { color: #fff; }
        
        @media (max-width: 992px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; } }
        @media (max-width: 576px) { .footer-grid { grid-template-columns: 1fr; } }