:root {
            --primary: rgb(24, 119, 242);
            --primary-dark: rgb(18, 90, 184);
            --primary-light: rgba(24, 119, 242, 0.08);
            --accent: #ff9900;
            --text-main: #1a1a1a;
            --text-sub: #666666;
            --bg-body: #f7f9fc;
            --bg-white: #ffffff;
            --border-color: #eaeaea;
            --radius: 12px;
            --shadow: 0 4px 20px rgba(0,0,0,0.05);
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; background: var(--bg-body); color: var(--text-main); line-height: 1.6; }
        a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
        ul, li { list-style: none; }
        img { max-width: 100%; height: auto; display: block; }
        
        
        .header { background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px); position: fixed; top: 0; left: 0; right: 0; z-index: 1000; box-shadow: 0 2px 10px rgba(0,0,0,0.05); }
        .header-container { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; height: 70px; padding: 0 20px; }
        .logo { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; }
        .logo img { display: block; height: 36px; width: auto; max-width: 150px; object-fit: contain; flex-shrink: 0; }
        .logo span { display: inline-block; font-size: 22px; font-weight: 800; color: var(--primary); white-space: nowrap; letter-spacing: 1px; }
        
        .nav-desktop { display: flex; gap: 30px; align-items: center; }
        .nav-desktop a { font-size: 16px; font-weight: 500; color: var(--text-main); position: relative; padding: 5px 0; }
        .nav-desktop a:hover { color: var(--primary); }
        .nav-desktop a::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; background: var(--primary); transition: width 0.3s; }
        .nav-desktop a:hover::after { width: 100%; }
        
        .nav-actions { display: flex; align-items: center; gap: 15px; }
        .btn-app { background: var(--primary); color: #fff; padding: 8px 20px; border-radius: 20px; font-weight: 600; font-size: 14px; box-shadow: 0 4px 10px rgba(24,119,242,0.3); }
        .btn-app:hover { background: var(--primary-dark); transform: translateY(-2px); }
        .menu-toggle { display: none; font-size: 24px; cursor: pointer; color: var(--text-main); }

        
        .mobile-mask { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 1001; opacity: 0; visibility: hidden; transition: 0.3s; }
        .mobile-mask.active { opacity: 1; visibility: visible; }
        .mobile-drawer { position: fixed; top: 0; left: -300px; bottom: 0; width: 280px; background: #fff; z-index: 1002; transition: left 0.3s ease; display: flex; flex-direction: column; box-shadow: 2px 0 15px rgba(0,0,0,0.1); }
        .mobile-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 { font-size: 24px; cursor: pointer; color: var(--text-sub); }
        .drawer-nav { padding: 20px; flex: 1; overflow-y: auto; }
        .drawer-nav a { display: block; padding: 15px 0; font-size: 16px; font-weight: 500; border-bottom: 1px dashed var(--border-color); color: var(--text-main); }
        .drawer-nav a:hover { color: var(--primary); padding-left: 10px; }

        
        .hero { margin-top: 70px; background: linear-gradient(135deg, #001529 0%, #003366 100%); color: #fff; padding: 80px 20px; position: relative; overflow: hidden; }
        .hero::before { content: ''; position: absolute; top: -50%; right: -20%; width: 600px; height: 600px; background: radial-gradient(circle, rgba(24,119,242,0.2) 0%, transparent 70%); border-radius: 50%; }
        .hero-container { max-width: 1200px; margin: 0 auto; display: flex; align-items: center; justify-content: space-between; position: relative; z-index: 2; gap: 40px; }
        .hero-content { flex: 1; max-width: 600px; }
        .hero-title { font-size: 48px; font-weight: 800; line-height: 1.2; margin-bottom: 20px; }
        .hero-title span { color: var(--accent); }
        .hero-desc { font-size: 18px; color: rgba(255,255,255,0.8); margin-bottom: 40px; line-height: 1.8; }
        .hero-btns { display: flex; gap: 20px; }
        .btn-main { background: var(--primary); color: #fff; padding: 15px 35px; border-radius: 30px; font-size: 18px; font-weight: 600; box-shadow: 0 8px 20px rgba(24,119,242,0.4); display: inline-flex; align-items: center; gap: 10px; }
        .btn-main:hover { background: var(--primary-dark); transform: translateY(-3px); box-shadow: 0 10px 25px rgba(24,119,242,0.5); }
        .btn-outline { border: 2px solid rgba(255,255,255,0.3); color: #fff; padding: 13px 30px; border-radius: 30px; font-size: 18px; font-weight: 600; }
        .btn-outline:hover { background: rgba(255,255,255,0.1); border-color: #fff; }
        .hero-visual { flex: 1; display: flex; justify-content: flex-end; position: relative; }
        .hero-visual img { max-width: 100%; height: auto; border-radius: 20px; box-shadow: 0 20px 50px rgba(0,0,0,0.3); animation: float 6s ease-in-out infinite; }
        @keyframes float { 0% { transform: translateY(0px); } 50% { transform: translateY(-20px); } 100% { transform: translateY(0px); } }

        
        .data-bar { background: #fff; padding: 30px 20px; border-bottom: 1px solid var(--border-color); }
        .data-container { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
        .data-item h4 { font-size: 32px; color: var(--primary); font-weight: 800; margin-bottom: 5px; }
        .data-item p { font-size: 14px; color: var(--text-sub); }

        
        .section { padding: 80px 20px; }
        .container { max-width: 1200px; margin: 0 auto; }
        .sec-title { text-align: center; margin-bottom: 50px; }
        .sec-title h2 { font-size: 36px; color: var(--text-main); margin-bottom: 15px; font-weight: 800; }
        .sec-title p { font-size: 16px; color: var(--text-sub); }
        
        .features-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
        .feat-card { background: #fff; padding: 40px 30px; border-radius: var(--radius); text-align: center; box-shadow: var(--shadow); transition: all 0.3s; position: relative; overflow: hidden; border: 1px solid transparent; }
        .feat-card:hover { transform: translateY(-10px); border-color: var(--primary); box-shadow: 0 15px 30px rgba(24,119,242,0.1); }
        .feat-icon { width: 70px; height: 70px; background: var(--primary-light); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; color: var(--primary); font-size: 32px; font-weight: bold; }
        .feat-card h3 { font-size: 20px; margin-bottom: 15px; color: var(--text-main); }
        .feat-card p { font-size: 14px; color: var(--text-sub); line-height: 1.6; }

        
        .news-section { background: #fff; padding: 80px 20px; }
        .news-layout { display: flex; gap: 40px; }
        
        .news-hot { flex: 1; max-width: 350px; background: var(--bg-body); padding: 30px; border-radius: var(--radius); }
        .news-hot h3 { font-size: 22px; color: var(--text-main); border-left: 4px solid var(--primary); padding-left: 15px; margin-bottom: 25px; }
        .hot-list { display: flex; flex-direction: column; gap: 15px; }
        .hot-item { display: flex; gap: 15px; align-items: center; border-bottom: 1px dashed var(--border-color); padding-bottom: 15px; }
        .hot-item:last-child { border-bottom: none; padding-bottom: 0; }
        .hot-num { width: 24px; height: 24px; background: #e0e0e0; color: #fff; border-radius: 4px; display: flex; align-items: center; justify-content: center; font-size: 12px; font-weight: bold; }
        .hot-item:nth-child(1) .hot-num { background: #ff4d4f; }
        .hot-item:nth-child(2) .hot-num { background: #ff7a45; }
        .hot-item:nth-child(3) .hot-num { background: #ffa940; }
        .hot-info { flex: 1; }
        .hot-title { font-size: 14px; color: var(--text-main); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .hot-title:hover { color: var(--primary); }

        .news-latest { flex: 2; }
        .news-latest h3 { font-size: 28px; margin-bottom: 30px; display: flex; justify-content: space-between; align-items: center; }
        .news-latest h3 a { font-size: 14px; font-weight: normal; color: var(--primary); }
        .news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
        .art-card { display: flex; background: var(--bg-body); border-radius: 8px; overflow: hidden; transition: all 0.3s; border: 1px solid var(--border-color); }
        .art-card:hover { box-shadow: var(--shadow); background: #fff; }
        .art-img { width: 140px; height: 120px; overflow: hidden; flex-shrink: 0; }
        .art-img img { width: 100%; height: 100%; object-fit: cover; transition: 0.5s; }
        .art-card:hover .art-img img { transform: scale(1.1); }
        .art-info { padding: 15px; display: flex; flex-direction: column; justify-content: space-between; flex: 1; }
        .art-info h4 { font-size: 16px; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }
        .art-info h4 a:hover { color: var(--primary); }
        .art-desc { font-size: 13px; color: var(--text-sub); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 10px; }
        .art-meta { font-size: 12px; color: #999; display: flex; justify-content: space-between; }
        .art-tags { color: var(--primary); background: var(--primary-light); padding: 2px 6px; border-radius: 4px; }

        
        .cta-section { background: linear-gradient(to right, rgba(24,119,242,0.9), rgba(18,90,184,0.9)), url('https://images.unsplash.com/photo-1551288049-bebda4e38f71?auto=format&fit=crop&w=1920&q=80') center/cover; padding: 80px 20px; text-align: center; color: #fff; }
        .cta-content h2 { font-size: 36px; margin-bottom: 20px; font-weight: 800; }
        .cta-content p { font-size: 18px; opacity: 0.9; margin-bottom: 30px; }

        
        .footer { background: #001529; color: #a0aec0; padding: 60px 20px 20px; margin-top: 40px; }
        .footer-grid { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand .logo span { color: #fff; }
        .footer-brand p { margin-top: 20px; font-size: 14px; line-height: 1.8; }
        .footer-title { color: #fff; font-size: 18px; font-weight: 600; margin-bottom: 20px; position: relative; padding-bottom: 10px; }
        .footer-title::after { content: ''; position: absolute; left: 0; bottom: 0; width: 30px; height: 2px; background: var(--primary); }
        .footer-links li { margin-bottom: 12px; }
        .footer-links a { font-size: 14px; }
        .footer-links a:hover { color: #fff; padding-left: 5px; }
        .footer-bottom { max-width: 1200px; margin: 0 auto; border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; display: flex; justify-content: space-between; align-items: center; font-size: 13px; }
        .footer-bottom-links { display: flex; gap: 15px; }
        
        @media (max-width: 992px) {
            .nav-desktop, .nav-actions { display: none; }
            .menu-toggle { display: block; }
            .hero-container { flex-direction: column; text-align: center; }
            .hero-btns { justify-content: center; }
            .features-grid, .data-container { grid-template-columns: repeat(2, 1fr); }
            .news-layout { flex-direction: column; }
            .news-hot { max-width: 100%; }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .hero-title { font-size: 32px; }
            .features-grid, .data-container, .news-grid, .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; gap: 10px; text-align: center; }
            .art-card { flex-direction: column; }
            .art-img { width: 100%; height: 160px; }
        }