/* ========================================
   霜枫企业网站信息管理系统V2.0© 2026 周志伟 版权所有。 - 前台样式
   ======================================== */
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Microsoft YaHei","Segoe UI",Arial,sans-serif;color:#333;font-size:15px;line-height:1.7;background:#fff}
a{color:#1a73e8;text-decoration:none}
a:hover{color:#0d47a1}
img{max-width:100%;height:auto}

/* 容器 */
.container{max-width:1200px;margin:0 auto;padding:0 15px}

/* 顶部 */
.top-bar{background:#1a73e8;color:#fff;padding:6px 0;font-size:13px}
.top-bar .container{display:flex;justify-content:space-between;align-items:center}
.top-bar a{color:#fff;margin-left:12px;opacity:.85}

/* 头部 */
.header{background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.06);position:sticky;top:0;z-index:100}
.header .container{display:flex;justify-content:space-between;align-items:center;height:70px}
.logo{font-size:20px;font-weight:700;color:#1a2b3a;display:flex;align-items:center}
.logo span{color:#1a73e8}
.logo img{max-height:40px}
.nav{display:flex;list-style:none;gap:2px}
.nav a{display:block;padding:8px 14px;color:#555;font-size:14px;font-weight:500;border-radius:6px;transition:all .2s}
.nav a:hover,.nav a.active{background:#f0f7ff;color:#1a73e8}
.nav-toggle{display:none;background:none;border:none;font-size:26px;color:#333;cursor:pointer;padding:4px 8px;line-height:1}

/* 轮播 */
.banner{position:relative;overflow:hidden;height:500px}
.banner-slide{display:none;position:relative}
.banner-slide.active{display:block}
.banner-slide img{width:100%;height:500px;object-fit:cover}
.banner-text{position:absolute;bottom:30px;left:50%;transform:translateX(-50%);color:#fff;text-align:center;text-shadow:0 2px 8px rgba(0,0,0,.3);width:90%}
.banner-text h2{font-size:22px;margin-bottom:6px}
.banner-text p{font-size:13px}
.banner-dots{position:absolute;bottom:12px;left:50%;transform:translateX(-50%);display:flex;gap:6px}
.banner-dots span{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.5);cursor:pointer;transition:all .3s}
.banner-dots span.active{background:#fff;width:24px;border-radius:6px}

/* 通用区域 */
.section{padding:40px 0}
.section-gray{background:#f8f9fa}
.section-title{text-align:center;margin-bottom:30px}
.section-title h2{font-size:22px;font-weight:700;color:#1a2b3a;margin-bottom:6px}
.section-title p{color:#888;font-size:13px}

/* 产品网格 */
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px}
.product-card{background:#fff;border-radius:10px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:all .3s}
.product-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.12)}
.product-card .img{height:180px;overflow:hidden;background:#f5f5f5}
.product-card .img img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.product-card:hover .img img{transform:scale(1.05)}
.product-card .info{padding:12px}
.product-card .info h3{font-size:14px;margin-bottom:4px;color:#333}
.product-card .info .price{font-size:18px;font-weight:700;color:#e83e8c}
.product-card .info .price del{font-size:12px;color:#999;font-weight:400;margin-left:6px}
.product-card .info p{font-size:12px;color:#888;margin-top:4px}

/* 文章列表 */
.article-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}
.article-card{background:#fff;border-radius:10px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:all .3s;display:flex;flex-direction:column}
.article-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px rgba(0,0,0,.12)}
.article-card .img{height:160px;overflow:hidden;background:#f5f5f5}
.article-card .img img{width:100%;height:100%;object-fit:cover}
.article-card .body{padding:14px;flex:1;display:flex;flex-direction:column}
.article-card .body h3{font-size:14px;margin-bottom:6px;line-height:1.4}
.article-card .body .meta{font-size:11px;color:#999;margin-top:auto;display:flex;gap:10px;padding-top:8px}

/* 页面标题区 */
.page-banner{background:linear-gradient(135deg,#1a73e8 0%,#0d47a1 100%);color:#fff;padding:35px 0;text-align:center}
.page-banner h1{font-size:22px;margin-bottom:4px}
.page-banner p{opacity:.8;font-size:13px}

/* 详情页 */
.detail-wrap{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.detail-images .main-img{width:100%;max-width:400px;height:auto;aspect-ratio:1/1;border-radius:10px;overflow:hidden;background:#f5f5f5}
.detail-images .main-img img{width:100%;height:100%;object-fit:cover}
.detail-images .thumbs{display:flex;gap:6px;margin-top:8px;flex-wrap:wrap}
.detail-images .thumbs img{width:60px;height:60px;object-fit:cover;border-radius:6px;cursor:pointer;border:2px solid transparent}
.detail-images .thumbs img.active{border-color:#1a73e8}
.detail-info h1{font-size:20px;margin-bottom:6px}
.detail-info .price{font-size:24px;font-weight:700;color:#e83e8c;margin-bottom:10px}
.detail-info .price del{font-size:14px;color:#999;font-weight:400;margin-left:8px}
.detail-info .specs{background:#f8f9fa;padding:12px;border-radius:8px;margin-bottom:10px;font-size:13px}
.detail-info .specs table{width:100%}
.detail-info .specs td{padding:5px 0;border-bottom:1px solid #eee}
.detail-info .specs td:first-child{color:#888;width:80px}
.detail-content{padding:20px 0}

/* 联系我们 */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.contact-info .item{display:flex;gap:16px;margin-bottom:20px}
.contact-info .item .icon{font-size:28px;width:50px;height:50px;background:#f0f7ff;border-radius:50%;display:flex;align-items:center;justify-content:center}
.contact-info .item h4{font-size:15px;margin-bottom:2px}
.contact-info .item p{color:#666;font-size:14px}

/* 留言表单 */
.contact-form .form-group{margin-bottom:16px}
.contact-form label{display:block;font-size:14px;font-weight:600;margin-bottom:4px;color:#555}
.contact-form input,.contact-form textarea,.contact-form select{width:100%;padding:10px 14px;border:2px solid #eee;border-radius:8px;font-size:14px;transition:border .2s}
.contact-form input:focus,.contact-form textarea:focus{border-color:#1a73e8;outline:none}
.contact-form textarea{min-height:120px;resize:vertical}
.contact-form button{padding:12px 36px;background:#1a73e8;color:#fff;border:none;border-radius:8px;font-size:16px;font-weight:600;cursor:pointer}
.contact-form button:hover{background:#1557b0}

/* 搜索 */
.search-bar{display:flex;gap:8px;margin-bottom:20px}
.search-bar input{flex:1;padding:12px 16px;border:2px solid #eee;border-radius:8px;font-size:14px}
.search-bar input:focus{border-color:#1a73e8;outline:none}
.search-bar button{padding:12px 28px;background:#1a73e8;color:#fff;border:none;border-radius:8px;cursor:pointer;font-weight:600}

/* 分类筛选 */
.filter-bar{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}
.filter-bar a{padding:6px 16px;border:1px solid #ddd;border-radius:20px;font-size:13px;color:#666}
.filter-bar a:hover,.filter-bar a.active{background:#1a73e8;color:#fff;border-color:#1a73e8}

/* 排序 */
.sort-bar{display:flex;gap:8px;margin-bottom:20px;font-size:13px;align-items:center}
.sort-bar a{padding:4px 12px;border-radius:4px;color:#666}
.sort-bar a:hover,.sort-bar a.active{background:#f0f7ff;color:#1a73e8}

/* 分页 */
.pagination{display:flex;justify-content:center;gap:5px;margin-top:30px}
.pagination a,.pagination span{padding:8px 14px;border:1px solid #ddd;border-radius:6px;font-size:14px}
.pagination a:hover{background:#1a73e8;color:#fff;border-color:#1a73e8}
.pagination .current{background:#1a73e8;color:#fff;border-color:#1a73e8}

/* 内页内容 */
.page-content{max-width:800px;margin:0 auto;line-height:1.9;min-height:460px}
.page-content img{max-width:100%;border-radius:6px;margin:12px 0}

/* 底部 */
.footer{background:#1a2b3a;color:#ccc;padding:30px 0}
.footer .container{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:20px}
.footer h3{color:#fff;font-size:14px;margin-bottom:10px}
.footer p{font-size:12px;line-height:1.7}
.footer a{color:#94a3b8}
.footer a:hover{color:#fff}
.footer-bottom{background:#152238;color:#94a3b8;text-align:center;padding:12px 0;font-size:12px}

/* 提示信息 */
.alert{padding:12px 16px;border-radius:8px;margin-bottom:16px}
.alert-success{background:#e8f5e9;color:#2e7d32}
.alert-danger{background:#fce4ec;color:#c62828}
.alert-info{background:#e3f2fd;color:#1565c0}

/* 空状态 */
.empty{text-align:center;padding:60px;color:#999}
.empty .icon{font-size:48px;margin-bottom:12px}

/* About 页面特性 */
.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}
.feature-item{text-align:center;padding:30px;background:#fff;border-radius:10px;box-shadow:0 2px 12px rgba(0,0,0,.06)}
.feature-item .icon{font-size:40px;margin-bottom:12px}
.feature-item h3{margin-bottom:6px;font-size:16px}
.feature-item p{font-size:13px;color:#888}

/* 友情链接 */
.link-bar{display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.link-bar a{color:#94a3b8;font-size:12px}
.link-bar a:hover{color:#fff}

/* ========== 移动端适配 (≤768px) ========== */
@media(max-width:768px){
  body{font-size:14px;line-height:1.6}
  .container{padding:0 12px}
  
  /* 顶部栏 */
  .top-bar{font-size:11px;padding:5px 0}
  .top-bar .container{flex-direction:column;gap:2px;text-align:center;padding:4px 0;justify-content:center}
  
  /* 导航 - 汉堡菜单 */
  .nav-toggle{display:block!important}
  .header .container{height:auto;padding:8px 0;flex-wrap:wrap}
  .logo{font-size:17px}
  .logo img{max-height:34px}
  .nav{display:none;width:100%;flex-direction:column;gap:0;margin-top:8px;border-top:1px solid #eee;padding-top:6px;background:#fafbfc;border-radius:8px}
  .nav.show{display:flex}
  .nav li{border-bottom:1px solid #f0f0f0}
  .nav li:last-child{border-bottom:none}
  .nav a{padding:10px 16px;border-radius:0;font-size:14px}
  .nav a:hover,.nav a.active{background:#e8f0fe;color:#1a73e8}
  
  /* 轮播 */
  .banner{height:auto !important}
  .banner-slide img{width:100%;height:auto;max-height:280px}
  .banner-text h2{font-size:18px}
  .banner-text p{font-size:12px;display:none}
  
  /* 区域间距 */
  .section{padding:28px 0}
  .section-title{margin-bottom:20px}
  .section-title h2{font-size:19px}
  
  /* 产品/文章网格 */
  .product-grid{grid-template-columns:repeat(2,1fr);gap:10px}
  .product-card .img{height:140px}
  .product-card .info{padding:10px}
  .article-list{grid-template-columns:1fr;gap:12px}
  .article-card{flex-direction:row;height:auto}
  .article-card .img{width:120px;height:100px;flex-shrink:0}
  .article-card .body h3{font-size:13px}
  
  /* 详情页 */
  .detail-wrap{grid-template-columns:1fr;gap:16px}
  .detail-images .main-img{max-width:100%}
  .detail-images .thumbs img{width:50px;height:50px}
  .detail-info h1{font-size:18px}
  .detail-info .price{font-size:20px}
  .detail-info .specs td:first-child{width:70px}
  
  /* 联系页 */
  .contact-grid{grid-template-columns:1fr;gap:20px}
  .contact-form input,.contact-form textarea{font-size:15px}
  
  /* 搜索/筛选 */
  .search-bar{flex-direction:column}
  .search-bar button{width:100%;text-align:center}
  .filter-bar{gap:6px}
  .filter-bar a{padding:4px 12px;font-size:12px}
  
  /* 分页 */
  .pagination a,.pagination span{padding:7px 11px;font-size:13px}
  
  /* 页面标题 */
  .page-banner{padding:25px 0}
  .page-banner h1{font-size:19px}
  
  /* 底部 */
  .footer{padding:24px 0}
  .footer .container{grid-template-columns:1fr 1fr;gap:16px}
  
  /* 特性网格 */
  .features-grid{grid-template-columns:1fr 1fr;gap:12px}
  .feature-item{padding:18px}
  .feature-item .icon{font-size:30px}
  
  /* 内页内容 */
  .page-content img{max-width:100%!important;height:auto!important}
}

/* ========== 小屏手机 (≤480px) ========== */
@media(max-width:480px){
  .product-grid{grid-template-columns:1fr}
  .product-card .img{height:200px}
  .article-card{flex-direction:column}
  .article-card .img{width:100%;height:150px}
  .detail-images .thumbs img{width:45px;height:45px}
  .footer .container{grid-template-columns:1fr}
}