:root{
    --primary:#1E66FF;
    --primary-2:#3D7FFF;
    --bg:#F5F7FA;
    --white:#FFFFFF;
    --text:#222222;
    --text-2:#666666;
    --success:#2BA471;
    --danger:#E54D42;
    --radius:14px;
    --shadow:0 4px 20px rgba(0,0,0,.06);
    --shadow-hover:0 10px 30px rgba(30,102,255,.18);
}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.6}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1180px;margin:0 auto;padding:0 16px}
.muted{color:var(--text-2)}
.empty{color:var(--text-2);padding:30px 0;text-align:center}
.empty a{color:var(--primary);font-weight:600}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 22px;border-radius:10px;font-weight:600;cursor:pointer;border:1px solid transparent;transition:.2s;font-size:14px}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:0 6px 18px rgba(30,102,255,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.btn-outline{background:#fff;border-color:var(--primary);color:var(--primary)}
.btn-outline:hover{background:rgba(30,102,255,.06)}
.btn-block{width:100%;margin-top:10px}
.link-danger{color:var(--danger)}

/* 头部 */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);box-shadow:0 2px 10px rgba(0,0,0,.05)}
.header-inner{display:flex;align-items:center;gap:18px;height:64px}
.logo{display:flex;align-items:center;gap:8px;font-weight:700;font-size:20px;color:var(--primary)}
.logo-mark{font-size:22px}
.logo-badge{background:var(--primary);color:#fff;font-size:11px;padding:2px 6px;border-radius:6px;font-weight:600}
.search-bar{flex:1;display:flex;max-width:420px}
.search-bar input{flex:1;border:1px solid #e3e8f0;border-right:none;border-radius:10px 0 0 10px;padding:9px 14px;outline:none}
.search-bar button{background:var(--primary);color:#fff;border:none;border-radius:0 10px 10px 0;padding:0 18px;cursor:pointer;font-weight:600}
.top-nav{display:flex;align-items:center;gap:14px;margin-left:auto}
.nav-link{color:var(--text-2);font-weight:500}
.nav-link:hover{color:var(--primary)}
.nav-register{background:var(--primary);color:#fff!important;padding:7px 16px;border-radius:8px}
.nav-user{font-weight:600;color:var(--primary)}
.nav-cart{background:rgba(30,102,255,.1);color:var(--primary);padding:7px 14px;border-radius:8px;font-weight:600}

.cat-nav{background:#fff;border-top:1px solid #eef1f6}
.cat-nav-inner{display:flex;gap:6px;flex-wrap:wrap;padding:10px 0}
.cat-link{padding:6px 14px;border-radius:8px;color:var(--text-2);font-weight:500;font-size:13px;transition:.15s}
.cat-link:hover{background:rgba(30,102,255,.08);color:var(--primary)}
.cat-publish{background:rgba(43,164,113,.12);color:var(--success)!important;font-weight:600}
.cat-about{margin-left:auto}

/* 主区 */
.site-main{min-height:60vh;padding:24px 0}
.section{margin-bottom:34px}
.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.section-head h2{font-size:20px;font-weight:700}
.more{color:var(--primary);font-weight:600}
.flash{padding:12px 16px;border-radius:10px;margin-bottom:16px;font-weight:500}
.flash-success{background:rgba(43,164,113,.12);color:var(--success)}
.flash-error{background:rgba(229,77,66,.12);color:var(--danger)}
.flash-info{background:rgba(30,102,255,.1);color:var(--primary)}

/* Hero */
.hero{border-radius:var(--radius);padding:46px 36px;margin-bottom:30px;color:#fff;position:relative;overflow:hidden}
.hero-icp{background:linear-gradient(135deg,#1E66FF,#3D7FFF)}
.hero-edi{background:linear-gradient(135deg,#3a1c71,#1E66FF)}
.hero::after{content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;background:rgba(255,255,255,.12);border-radius:50%}
.hero-content{position:relative;z-index:1}
.hero h1{font-size:30px;font-weight:700;margin-bottom:10px}
.hero p{opacity:.92;margin-bottom:18px;font-size:15px}

/* 分类网格 */
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(130px,1fr));gap:14px}
.cat-card{background:#fff;border-radius:12px;padding:20px 12px;text-align:center;box-shadow:var(--shadow);transition:.2s;border:1px solid #eef1f6}
.cat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(30,102,255,.3)}
.cat-icon{font-size:26px;display:block;margin-bottom:8px}
.cat-name{font-weight:600;color:var(--text)}

/* 卡片列表（信息） */
.card-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}
.info-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:.2s;border:1px solid #eef1f6}
.info-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.info-thumb{height:160px;background:#eef1f6;overflow:hidden}
.info-thumb img{width:100%;height:100%;object-fit:cover}
.info-body{padding:14px 16px}
.info-cat{display:inline-block;background:rgba(30,102,255,.1);color:var(--primary);font-size:12px;padding:2px 8px;border-radius:6px;margin-bottom:8px}
.info-title{font-size:16px;font-weight:600;margin-bottom:6px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.info-excerpt{color:var(--text-2);font-size:13px;height:40px;overflow:hidden}
.info-meta{display:flex;justify-content:space-between;color:#9aa3b2;font-size:12px;margin-top:10px}

/* 商品网格 */
.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:18px}
.product-card{background:#fff;border-radius:12px;overflow:hidden;box-shadow:var(--shadow);transition:.2s;border:1px solid #eef1f6}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.product-thumb{height:180px;background:linear-gradient(135deg,#f0f3f8,#e6ebf3);display:flex;align-items:center;justify-content:center}
.product-thumb img{width:100%;height:100%;object-fit:cover}
.product-thumb-ph{font-size:46px}
.product-thumb-ph.big{width:100%;height:340px;font-size:90px}
.product-body{padding:12px 14px}
.product-title{font-size:15px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.product-price{color:var(--danger);font-weight:700;font-size:16px;margin-top:6px}

/* 列表布局 */
.list-layout{display:grid;grid-template-columns:220px 1fr;gap:24px}
.side-cats{background:#fff;border-radius:12px;padding:18px;box-shadow:var(--shadow);align-self:start;position:sticky;top:130px}
.side-cats h3{font-size:15px;margin-bottom:12px}
.side-cat{display:block;padding:8px 12px;border-radius:8px;color:var(--text-2);margin-bottom:4px;font-weight:500;transition:.15s}
.side-cat:hover,.side-cat.active{background:rgba(30,102,255,.1);color:var(--primary)}
.list-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px}
.list-head h2{font-size:20px;font-weight:700}
.list-count{color:var(--text-2)}
.pager{display:flex;gap:12px;align-items:center;justify-content:center;margin-top:24px}
.pager a{background:#fff;border:1px solid #e3e8f0;padding:8px 16px;border-radius:8px;font-weight:600;color:var(--primary)}
.pager-info{color:var(--text-2)}

/* 详情 */
.detail-layout{display:grid;grid-template-columns:1fr 280px;gap:24px}
.detail-main{background:#fff;border-radius:12px;padding:26px;box-shadow:var(--shadow)}
.detail-cat{display:inline-block;background:rgba(30,102,255,.1);color:var(--primary);font-size:12px;padding:3px 10px;border-radius:6px;margin-bottom:10px}
.detail-title{font-size:24px;font-weight:700;margin-bottom:12px}
.detail-meta{display:flex;gap:20px;color:var(--text-2);font-size:13px;margin-bottom:16px;padding-bottom:16px;border-bottom:1px solid #eef1f6}
.detail-cover{margin-bottom:18px;border-radius:10px;overflow:hidden;max-height:380px}
.detail-cover img{width:100%;object-fit:cover}
.detail-content{font-size:15px;line-height:1.9;white-space:pre-wrap}
.detail-side .side-box{background:#fff;border-radius:12px;padding:18px;box-shadow:var(--shadow);margin-bottom:14px}
.detail-side h4{margin-bottom:8px}
.virtual-tip{color:var(--danger);font-size:13px;margin-top:14px}

.product-detail{display:grid;grid-template-columns:360px 1fr;gap:30px}
.product-detail-thumb{background:linear-gradient(135deg,#f0f3f8,#e6ebf3);border-radius:12px;overflow:hidden;height:360px;display:flex;align-items:center;justify-content:center}
.product-detail-info .detail-title{font-size:26px}
.product-detail-price{color:var(--danger);font-size:30px;font-weight:700;margin:10px 0}
.product-stock{color:var(--text-2);margin-bottom:12px}
.product-desc{color:var(--text-2);line-height:1.8;margin-bottom:20px}
.buy-bar{display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.qty{display:flex;align-items:center;border:1px solid #e3e8f0;border-radius:8px;overflow:hidden}
.qty-btn{width:34px;height:38px;border:none;background:#f5f7fa;font-size:18px;cursor:pointer}
.qty input{width:50px;height:38px;border:none;text-align:center;outline:none}
.virtual-notice{background:rgba(229,77,66,.08);color:var(--danger);padding:12px 16px;border-radius:10px;margin:18px 0;font-size:13px}

/* 表单 */
.form-page{max-width:760px;margin:0 auto;background:#fff;border-radius:14px;padding:30px;box-shadow:var(--shadow)}
.form-page.narrow{max-width:420px}
.form-title{font-size:22px;font-weight:700;margin-bottom:22px;text-align:center}
.form .form-row{margin-bottom:18px}
.form label{display:block;font-weight:600;margin-bottom:7px}
.form input[type=text],.form input[type=email],.form input[type=password],.form input[type=number],.form select,.form textarea{
    width:100%;border:1px solid #e3e8f0;border-radius:10px;padding:11px 14px;font-size:14px;outline:none;font-family:inherit;transition:.15s;
}
.form input:focus,.form select:focus,.form textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(30,102,255,.12)}
.form textarea{resize:vertical}
.form-row.two-col{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-tip{text-align:center;margin-top:14px;color:var(--text-2)}
.form-tip a{color:var(--primary);font-weight:600}
.img-preview{margin-top:10px;display:flex;gap:10px;flex-wrap:wrap}
.img-preview img{width:90px;height:90px;object-fit:cover;border-radius:8px;border:1px solid #eef1f6}

/* 购物车 / 订单 */
.table{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
.table th,.table td{padding:13px 14px;text-align:left;border-bottom:1px solid #eef1f6;font-size:13px}
.table th{background:#f7f9fc;color:var(--text-2);font-weight:600}
.table tr:hover{background:#fafbfe}
.cart-product{display:flex;align-items:center;gap:10px}
.cart-product img{width:48px;height:48px;object-fit:cover;border-radius:8px}
.cart-foot{display:flex;align-items:center;gap:18px;margin-top:18px;flex-wrap:wrap}
.cart-total{font-size:16px}
.cart-total strong{color:var(--danger);font-size:20px}
.order-card{background:#f7f9fc;border-radius:12px;padding:18px;margin:16px 0}
.order-row{display:flex;justify-content:space-between;padding:7px 0;border-bottom:1px dashed #e3e8f0}
.order-row:last-child{border-bottom:none}
.success-page{text-align:center;max-width:560px}
.success-icon{width:70px;height:70px;border-radius:50%;background:var(--success);color:#fff;font-size:38px;display:flex;align-items:center;justify-content:center;margin:0 auto 16px}
.success-actions{display:flex;gap:12px;justify-content:center;margin-top:20px}
.order-item{border:1px solid #eef1f6;border-radius:12px;padding:16px;margin-bottom:14px;background:#fff;box-shadow:var(--shadow)}
.order-item-head{display:flex;gap:16px;align-items:center;font-weight:600;margin-bottom:8px}
.order-status{color:var(--success)}
.order-total{margin-left:auto;color:var(--danger)}
.order-item-products{display:flex;gap:12px;flex-wrap:wrap;color:var(--text-2);font-size:13px}
.empty-page{text-align:center;padding:80px 20px}
.empty-page h1{font-size:26px;margin-bottom:12px}

/* 用户中心 */
.profile-card{display:flex;align-items:center;gap:18px;background:#f7f9fc;border-radius:12px;padding:20px;margin-bottom:20px}
.profile-avatar{width:64px;height:64px;border-radius:50%;background:rgba(30,102,255,.12);display:flex;align-items:center;justify-content:center;font-size:34px}
.center-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:10px}

/* 后台 */
.admin-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px}
.status-tabs{display:flex;gap:6px}
.status-tabs a{padding:6px 14px;border-radius:8px;color:var(--text-2);font-weight:600}
.status-tabs a.active{background:var(--primary);color:#fff}
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:16px;margin-bottom:24px}
.stat-card{background:#fff;border-radius:12px;padding:22px;text-align:center;box-shadow:var(--shadow)}
.stat-num{font-size:30px;font-weight:700;color:var(--primary)}
.stat-label{color:var(--text-2);margin-top:4px}
.admin-links{display:flex;gap:12px;flex-wrap:wrap}
.row-actions{display:flex;gap:6px;flex-wrap:wrap}
.btn-mini{padding:5px 12px;border-radius:7px;border:none;font-size:12px;font-weight:600;cursor:pointer;background:#f0f3f8;color:var(--text-2)}
.btn-ok{background:rgba(43,164,113,.15);color:var(--success)}
.btn-danger{background:rgba(229,77,66,.12);color:var(--danger)}
.thumb-sm{width:40px;height:40px;object-fit:cover;border-radius:6px}
.thumb-preview{width:80px;height:80px;object-fit:cover;border-radius:8px;margin-bottom:8px}

/* 文章 */
.article h3{margin:18px 0 8px;font-size:16px}
.article p{margin-bottom:10px;color:var(--text-2);line-height:1.9}
.article ul{padding-left:22px;color:var(--text-2);line-height:2}

/* 页脚 */
.site-footer{background:#1b2330;color:#aeb6c2;margin-top:40px;padding:40px 0 24px}
.footer-cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:30px;margin-bottom:24px}
.footer-col h4{color:#fff;margin-bottom:12px}
.footer-col a{display:block;color:#aeb6c2;margin-bottom:8px}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid #2c3543;padding-top:16px;text-align:center;font-size:13px}

/* 响应式 */
@media(max-width:860px){
    .list-layout,.detail-layout,.product-detail{grid-template-columns:1fr}
    .side-cats{position:static}
    .header-inner{flex-wrap:wrap;height:auto;padding:10px 0;gap:10px}
    .search-bar{order:3;max-width:none;flex-basis:100%}
    .top-nav{margin-left:0}
}