/* Reset */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;font-size:14px;line-height:1.6;color:#333;background:#f5f7fa}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:#0d47a1;transition:color .3s}
a:hover{color:#002171}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 15px}

/* Header */
.header{background:#fff;border-bottom:3px solid #0d47a1;position:sticky;top:0;z-index:1000}
.header-top{background:#0d47a1;color:#fff;padding:8px 0;font-size:13px}
.header-top .container{display:flex;justify-content:space-between;align-items:center}
.header-main{padding:15px 0;display:flex;justify-content:space-between;align-items:center}
.logo{display:flex;align-items:center;gap:12px}
.logo-icon{width:50px;height:50px;background:#0d47a1;border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px;font-weight:bold}
.logo-text h1{font-size:20px;color:#0d47a1;letter-spacing:1px}
.logo-text p{font-size:12px;color:#888;margin-top:2px}
.hotline{text-align:right}
.hotline .tel{font-size:24px;color:#0d47a1;font-weight:bold}
.hotline p{font-size:12px;color:#666}

/* Nav */
.nav{background:#0d47a1}
.nav ul{display:flex;flex-wrap:wrap}
.nav li{flex:1;text-align:center}
.nav a{display:block;padding:14px 10px;color:#fff;font-size:15px;font-weight:500}
.nav a:hover,.nav a.active{background:#002171}

/* Mobile menu */
.menu-toggle{display:none;background:none;border:none;color:#fff;font-size:24px;cursor:pointer;padding:10px}

/* Banner */
.banner{position:relative;overflow:hidden;background:#0a1929}
.banner img{width:100%;height:400px;object-fit:cover;opacity:.85}
.banner-overlay{position:absolute;inset:0;background:rgba(0,0,0,.5);display:flex;align-items:center}
.banner-content{color:#fff;max-width:600px}
.banner-content h2{font-size:36px;margin-bottom:15px;text-shadow:1px 1px 3px rgba(0,0,0,.5)}
.banner-content p{font-size:16px;margin-bottom:25px;line-height:1.8}
.btn{display:inline-block;padding:12px 35px;background:#0d47a1;color:#fff;border-radius:4px;font-size:15px;font-weight:500}
.btn:hover{background:#002171;color:#fff}

/* Section */
.section{padding:50px 0}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:28px;color:#0d47a1;margin-bottom:10px}
.section-title p{color:#888;font-size:14px}
.section-title .line{width:60px;height:3px;background:#0d47a1;margin:15px auto}

/* Cards */
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:25px}
.card{background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 2px 10px rgba(0,0,0,.08);transition:transform .3s,box-shadow .3s}
.card:hover{transform:translateY(-5px);box-shadow:0 8px 25px rgba(0,0,0,.12)}
.card-img{height:200px;overflow:hidden;background:#f0f0f0}
.card-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.card:hover .card-img img{transform:scale(1.05)}
.card-body{padding:20px}
.card-body h3{font-size:17px;color:#333;margin-bottom:10px}
.card-body p{color:#666;font-size:13px;line-height:1.7}

/* About */
.about-content{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.about-img{border-radius:8px;overflow:hidden;box-shadow:0 4px 15px rgba(0,0,0,.1)}
.about-text h3{font-size:22px;color:#0d47a1;margin-bottom:15px}
.about-text p{color:#555;margin-bottom:12px;line-height:1.8;text-align:justify}
.about-list{margin-top:20px}
.about-list li{padding:8px 0;border-bottom:1px dashed #ddd;display:flex;align-items:center;gap:10px}
.about-list li::before{content:"✓";color:#0d47a1;font-weight:bold}

/* Features */
.features{background:#fff}
.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:30px}
.feature-item{text-align:center;padding:30px 20px;border:1px solid #eee;border-radius:8px;transition:all .3s}
.feature-item:hover{border-color:#0d47a1;box-shadow:0 5px 20px rgba(13,71,161,.1)}
.feature-icon{width:60px;height:60px;background:#0d47a1;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 15px;font-size:24px}
.feature-item h3{font-size:16px;margin-bottom:8px}
.feature-item p{font-size:13px;color:#777}

/* News */
.news-list{background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 2px 10px rgba(0,0,0,.08)}
.news-item{display:flex;padding:20px;border-bottom:1px solid #f0f0f0;transition:background .3s}
.news-item:hover{background:#fafafa}
.news-date{width:70px;text-align:center;padding-right:20px;border-right:2px solid #0d47a1;flex-shrink:0}
.news-date .day{font-size:28px;color:#0d47a1;font-weight:bold}
.news-date .month{font-size:12px;color:#888}
.news-info{padding-left:20px;flex:1}
.news-info h4{font-size:15px;color:#333;margin-bottom:6px}
.news-info p{font-size:13px;color:#888}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-info{background:#fff;padding:30px;border-radius:8px;box-shadow:0 2px 10px rgba(0,0,0,.08)}
.contact-info h3{font-size:18px;color:#0d47a1;margin-bottom:20px}
.contact-item{display:flex;gap:15px;margin-bottom:20px;align-items:flex-start}
.contact-item .icon{width:40px;height:40px;background:#0d47a1;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-size:16px}
.contact-item h4{font-size:14px;color:#333;margin-bottom:4px}
.contact-item p{font-size:13px;color:#666}
.contact-form{background:#fff;padding:30px;border-radius:8px;box-shadow:0 2px 10px rgba(0,0,0,.08)}
.contact-form h3{font-size:18px;color:#0d47a1;margin-bottom:20px}
.form-group{margin-bottom:15px}
.form-group label{display:block;margin-bottom:5px;font-size:13px;color:#555}
.form-group input,.form-group textarea,.form-group select{width:100%;padding:10px 12px;border:1px solid #ddd;border-radius:4px;font-size:13px;transition:border .3s}
.form-group input:focus,.form-group textarea:focus,.form-group select:focus{border-color:#0d47a1;outline:none}
.form-group textarea{resize:vertical;min-height:100px}

/* Table */
.table-wrap{overflow-x:auto}
table{width:100%;border-collapse:collapse;background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.08)}
th,td{padding:12px 15px;text-align:left;border-bottom:1px solid #eee}
th{background:#0d47a1;color:#fff;font-weight:500}
tr:hover{background:#fafafa}

/* Footer */
.footer{background:#0a1929;color:#aaa;padding:40px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px}
.footer h4{color:#fff;font-size:16px;margin-bottom:20px}
.footer p,.footer a{color:#aaa;font-size:13px;line-height:2}
.footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid #333;margin-top:30px;padding:20px 0;text-align:center;font-size:12px}
.footer-bottom a{color:#0d47a1}

/* Breadcrumb */
.breadcrumb{background:#e8ecf1;padding:12px 0;font-size:13px}
.breadcrumb a{color:#666}
.breadcrumb span{color:#0d47a1}

/* Sitemap */
.sitemap-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:30px}
.sitemap-section{background:#fff;padding:25px;border-radius:8px;box-shadow:0 2px 10px rgba(0,0,0,.08)}
.sitemap-section h3{font-size:16px;color:#0d47a1;margin-bottom:15px;padding-bottom:10px;border-bottom:2px solid #0d47a1}
.sitemap-section ul li{padding:8px 0;border-bottom:1px dashed #eee}
.sitemap-section ul li a{color:#555;font-size:14px}
.sitemap-section ul li a:hover{color:#0d47a1}

/* Service flow */
.service-flow{display:flex;justify-content:space-between;align-items:center;gap:15px;margin:30px 0;flex-wrap:wrap}
.flow-step{flex:1;min-width:140px;text-align:center;padding:20px 15px;background:#fff;border-radius:8px;box-shadow:0 2px 10px rgba(0,0,0,.08);position:relative}
.flow-step .num{width:36px;height:36px;background:#0d47a1;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 10px;font-weight:bold}
.flow-step h4{font-size:14px;color:#333;margin-bottom:5px}
.flow-step p{font-size:12px;color:#888}
.flow-arrow{color:#0d47a1;font-size:24px;font-weight:bold}

/* Responsive */
@media(max-width:768px){
.header-main{flex-direction:column;gap:10px;text-align:center}
.hotline{text-align:center}
.nav ul{display:none;position:absolute;top:100%;left:0;right:0;background:#0d47a1;flex-direction:column}
.nav ul.active{display:flex}
.nav li{border-bottom:1px solid rgba(255,255,255,.1)}
.menu-toggle{display:block;position:absolute;right:15px;top:50%;transform:translateY(-50%)}
.banner img{height:250px}
.banner-content h2{font-size:24px}
.about-content,.contact-grid{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr 1fr}
.card-grid{grid-template-columns:1fr}
.service-flow{flex-direction:column}
.flow-arrow{transform:rotate(90deg)}
}
@media(max-width:480px){
.footer-grid{grid-template-columns:1fr}
.logo-text h1{font-size:18px}
}

/* Lazy load placeholder */
img[data-src]{background:#f0f0f0;min-height:150px}