:root{
  --primary:#1f5fd6;
  --primary-dark:#1a4fb0;
  --gold:#b8860b;
  --text:#1f2733;
  --text-2:#5b6675;
  --text-3:#8a94a6;
  --border:#e4e8ef;
  --bg:#f6f8fb;
  --surface:#ffffff;
  --success:#1f9d55;
  --danger:#d64545;
  --radius:10px;
  --shadow:0 1px 3px rgba(20,30,50,.06),0 6px 20px rgba(20,30,50,.05);
  --header-h:64px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.6;
  font-size:15px;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
.muted{color:var(--text-2)}
.small{font-size:13px}
.tag{display:inline-block;font-size:12px;color:var(--primary-dark);background:#eef3fe;border:1px solid #dde7fb;padding:2px 8px;border-radius:20px;margin:2px 4px 2px 0}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--border)}
.header-inner{height:var(--header-h);display:flex;align-items:center;gap:18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--text);white-space:nowrap}
.brand .logo{width:34px;height:34px;flex:0 0 auto}
.brand .name{font-size:16px;letter-spacing:.3px}
.nav{display:flex;gap:4px;margin-left:8px}
.nav a{padding:8px 12px;border-radius:8px;color:var(--text-2);font-size:14px;font-weight:500}
.nav a:hover{background:var(--bg);color:var(--text)}
.nav a.active{color:var(--primary);background:#eef3fe}
.header-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.icon-btn{position:relative;display:inline-flex;align-items:center;gap:6px;padding:8px 12px;border:1px solid var(--border);border-radius:8px;background:#fff;color:var(--text-2);font-size:14px}
.icon-btn:hover{border-color:#cdd6e4;color:var(--text)}
.cart-badge{position:absolute;top:-7px;right:-7px;min-width:18px;height:18px;padding:0 5px;background:var(--danger);color:#fff;border-radius:9px;font-size:11px;line-height:18px;text-align:center;font-weight:700}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 18px;border-radius:8px;border:1px solid transparent;font-size:14px;font-weight:600;background:var(--primary);color:#fff;transition:.15s}
.btn:hover{background:var(--primary-dark)}
.btn.ghost{background:#fff;border-color:var(--border);color:var(--text)}
.btn.ghost:hover{border-color:#cdd6e4}
.btn.gold{background:var(--gold);color:#fff}
.btn.gold:hover{filter:brightness(.95)}
.btn.block{width:100%}
.btn.sm{padding:7px 12px;font-size:13px}
.btn:disabled{opacity:.55;cursor:not-allowed}
.user-menu{position:relative}
.user-menu .menu{position:absolute;right:0;top:46px;background:#fff;border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow);min-width:160px;padding:6px;display:none}
.user-menu.open .menu{display:block}
.user-menu .menu a{display:block;padding:9px 12px;border-radius:7px;color:var(--text-2);font-size:14px}
.user-menu .menu a:hover{background:var(--bg);color:var(--text)}
.hamburger{display:none;margin-left:auto;border:1px solid var(--border);background:#fff;border-radius:8px;padding:8px 10px}

/* hero */
.hero{background:linear-gradient(180deg,#fff,#f3f7ff);border-bottom:1px solid var(--border);padding:54px 0}
.hero h1{font-size:30px;margin:0 0 12px;line-height:1.35}
.hero p{font-size:16px;color:var(--text-2);max-width:680px;margin:0 0 22px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.modules{display:grid;grid-template-columns:1fr 1fr;gap:22px;padding:46px 0}
.module-card{background:#fff;border:1px solid var(--border);border-radius:14px;padding:28px;box-shadow:var(--shadow);transition:.15s}
.module-card:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(20,30,50,.08)}
.module-card .m-ico{width:52px;height:52px;border-radius:12px;background:#eef3fe;display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.module-card h3{margin:0 0 8px;font-size:20px}
.module-card p{color:var(--text-2);margin:0 0 18px}
.section-title{font-size:22px;margin:0 0 6px}
.section-sub{color:var(--text-2);margin:0 0 22px}
.section{padding:40px 0}

/* grids */
.grid{display:grid;gap:18px}
.grid.cards{grid-template-columns:repeat(4,1fr)}
.grid.info{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--border);border-radius:12px;overflow:hidden;transition:.15s;display:flex;flex-direction:column}
.card:hover{box-shadow:var(--shadow);transform:translateY(-2px)}
.card .thumb{aspect-ratio:1/1;background:#f0f2f5;overflow:hidden}
.card .thumb img{width:100%;height:100%;object-fit:cover}
.card .body{padding:14px;display:flex;flex-direction:column;gap:6px;flex:1}
.card .title{font-weight:600;font-size:15px;line-height:1.4;min-height:42px}
.card .meta{color:var(--text-3);font-size:13px;display:flex;justify-content:space-between}
.price{color:var(--danger);font-weight:700;font-size:18px}
.price .ori{color:var(--text-3);font-weight:400;font-size:13px;text-decoration:line-through;margin-left:6px}
.merchant-chip{font-size:12px;color:var(--text-2);display:inline-flex;align-items:center;gap:5px}
.dot{width:8px;height:8px;border-radius:50%;display:inline-block}

/* filters */
.toolbar{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-bottom:20px}
.search{position:relative;flex:1;min-width:220px}
.search input{width:100%;padding:10px 12px 10px 38px;border:1px solid var(--border);border-radius:9px;font-size:14px;background:#fff}
.search svg{position:absolute;left:11px;top:50%;transform:translateY(-50%);color:var(--text-3)}
.chips{display:flex;gap:8px;flex-wrap:wrap}
.chip{padding:7px 14px;border:1px solid var(--border);border-radius:20px;background:#fff;color:var(--text-2);font-size:13px}
.chip.active{background:var(--primary);color:#fff;border-color:var(--primary)}

/* product detail */
.detail{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr) 264px;gap:26px;background:#fff;border:1px solid var(--border);border-radius:14px;padding:26px;margin-top:20px;align-items:start}
.gallery .main{border:1px solid var(--border);border-radius:12px;overflow:hidden;aspect-ratio:1/1;background:#f0f2f5}
.gallery .main img{width:100%;height:100%;object-fit:cover}
.thumbs{display:flex;gap:10px;margin-top:12px}
.thumbs img{width:64px;height:64px;border:2px solid transparent;border-radius:8px;object-fit:cover;cursor:pointer}
.thumbs img.active{border-color:var(--primary)}
.p-info h1{margin:0 0 10px;font-size:24px}
.p-price{display:flex;align-items:baseline;gap:10px;margin:14px 0}
.qty{display:inline-flex;align-items:center;border:1px solid var(--border);border-radius:8px;overflow:hidden}
.qty button{width:36px;height:38px;border:none;background:#fff;font-size:18px;color:var(--text-2)}
.qty input{width:48px;height:38px;border:none;text-align:center;border-left:1px solid var(--border);border-right:1px solid var(--border);font-size:15px}
.specs{margin:16px 0;border-top:1px dashed var(--border);padding-top:14px}
.specs .row{display:flex;gap:14px;padding:6px 0;font-size:14px}
.specs .row .k{color:var(--text-3);width:84px;flex:0 0 auto}
.merchant-box{display:flex;align-items:center;gap:12px;border:1px solid var(--border);border-radius:10px;padding:12px;margin:14px 0;background:var(--bg)}
.merchant-box .m-logo{width:42px;height:42px;border-radius:9px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700}

/* 商品详情页 —— 右侧商家信息栏 */
.shop-side{border:1px solid var(--border);border-radius:12px;background:var(--surface);overflow:hidden}
.shop-side .s-hd{display:flex;align-items:center;gap:8px;padding:12px 14px;border-bottom:1px solid var(--border);background:var(--bg);font-weight:600;font-size:14px;color:var(--text)}
.shop-side .s-hd svg{flex:0 0 auto;color:var(--primary)}
.shop-side .s-body{padding:14px}
.shop-head{display:flex;align-items:center;gap:11px;padding-bottom:13px;border-bottom:1px solid var(--border)}
.shop-head .s-logo{width:46px;height:46px;border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:18px;flex:0 0 auto}
.shop-head .s-name{font-weight:600;font-size:14.5px;line-height:1.4;color:var(--text)}
.shop-head .s-sub{font-size:12px;color:var(--text-3);margin-top:3px}
.shop-row{display:flex;justify-content:space-between;align-items:baseline;gap:10px;padding:8px 0;font-size:13.5px;border-bottom:1px dashed var(--border)}
.shop-row:last-of-type{border-bottom:0;padding-bottom:2px}
.shop-row .k{color:var(--text-3);flex:0 0 auto}
.shop-row .v{color:var(--text);text-align:right;word-break:break-all;font-weight:500}
.shop-row .v a{color:var(--primary);font-weight:500}
.shop-desc{font-size:13px;color:var(--text-2);line-height:1.75;background:var(--bg);border-radius:8px;padding:10px 12px;margin:12px 0 14px}
.shop-side .btn{width:100%;justify-content:center}
.shop-side .btn+.btn{margin-top:9px}
.shop-side .s-note{font-size:12px;color:var(--text-3);line-height:1.7;margin:12px 0 0;padding-top:11px;border-top:1px dashed var(--border)}

/* 商城 —— 按商家筛选时的店铺条 */
.shop-banner{display:flex;align-items:center;gap:14px;background:#fff;border:1px solid var(--border);border-radius:12px;padding:14px 16px;margin:14px 0 4px;box-shadow:var(--shadow)}
.shop-banner .sb-logo{width:48px;height:48px;border-radius:11px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:19px;flex:0 0 auto}
.shop-banner .sb-txt{flex:1;min-width:0}
.shop-banner .sb-name{font-weight:600;font-size:15px;margin-bottom:4px}
.shop-banner .sb-desc{font-size:13px;color:var(--text-2);line-height:1.6}
@media (max-width:680px){.shop-banner{flex-wrap:wrap}}

/* cart */
.cart-table{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--border);border-radius:12px;overflow:hidden}
.cart-table th,.cart-table td{padding:14px;text-align:left;border-bottom:1px solid var(--border)}
.cart-table tr:last-child td{border-bottom:none}
.cart-item{display:flex;gap:12px;align-items:center}
.cart-item img{width:64px;height:64px;border-radius:8px;object-fit:cover;border:1px solid var(--border)}
.summary-card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:20px;position:sticky;top:84px}
.summary-card .line{display:flex;justify-content:space-between;padding:7px 0;color:var(--text-2)}
.summary-card .total{display:flex;justify-content:space-between;padding-top:12px;margin-top:8px;border-top:1px dashed var(--border);font-weight:700;font-size:17px}
.empty{text-align:center;padding:60px 20px;color:var(--text-3)}
.empty svg{margin:0 auto 14px;opacity:.5}

/* info detail */
.article{background:#fff;border:1px solid var(--border);border-radius:14px;padding:26px;margin-top:18px}
.article .cover{width:100%;max-height:420px;object-fit:cover;border-radius:12px;margin-bottom:18px;background:#f0f2f5}
.article h1{margin:0 0 10px;font-size:24px}
.contact-card{background:var(--bg);border:1px solid var(--border);border-radius:12px;padding:18px;margin:20px 0;display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.contact-card .avatar{width:46px;height:46px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px}
.contact-card .phone{font-size:20px;font-weight:700;letter-spacing:1px}

/* forms */
.form-wrap{max-width:560px;margin:0 auto;background:#fff;border:1px solid var(--border);border-radius:14px;padding:28px}
.form-wrap.wide{max-width:760px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:600;margin-bottom:7px}
.field input,.field textarea,.field select{width:100%;padding:11px 13px;border:1px solid var(--border);border-radius:9px;font-size:14px;font-family:inherit;background:#fff;color:var(--text)}
.field textarea{min-height:120px;resize:vertical}
.field .hint{font-size:12px;color:var(--text-3);margin-top:5px}
.check{display:flex;align-items:flex-start;gap:9px;margin:10px 0;font-size:14px;color:var(--text-2)}
.check input{margin-top:3px}
.check a{color:var(--primary)}
.auth-switch{text-align:center;margin-top:16px;color:var(--text-2);font-size:14px}
.auth-switch a{color:var(--primary);font-weight:600}

/* two column layout */
.split{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:22px;align-items:start}

/* breadcrumb */
.crumb{font-size:13px;color:var(--text-3);margin:16px 0 4px}
.crumb a:hover{color:var(--primary)}

/* footer */
.site-footer{background:#0f1b2d;color:#c5cede;margin-top:50px;padding:42px 0 22px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:26px}
.site-footer h4{color:#fff;font-size:15px;margin:0 0 14px}
.site-footer a{color:#9fb0c8;font-size:14px;display:block;padding:4px 0}
.site-footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid #1e2c40;margin-top:28px;padding-top:16px;font-size:13px;color:#8295ad;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.footer-bottom a{display:inline;color:#9fb0c8}
.notice{font-size:12.5px;color:#7e90a8;margin-top:10px;line-height:1.7}

/* about */
.about-hero{background:#fff;border:1px solid var(--border);border-radius:14px;padding:30px;margin-top:18px}
.kv{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 30px;margin-top:18px}
.kv .item{border-bottom:1px dashed var(--border);padding:10px 0}
.kv .item .k{font-size:13px;color:var(--text-3)}
.kv .item .v{font-size:15px;font-weight:600}

/* admin */
.admin-shell{display:grid;grid-template-columns:210px minmax(0,1fr);min-height:calc(100vh - var(--header-h));background:var(--bg)}
.admin-side{background:#0f1b2d;color:#c5cede;padding:18px 12px}
.admin-side .a-brand{color:#fff;font-weight:700;padding:6px 10px 16px;font-size:15px}
.admin-side a{display:block;padding:10px 12px;border-radius:8px;color:#aebfd4;font-size:14px;margin-bottom:4px}
.admin-side a:hover,.admin-side a.active{background:#1c2c44;color:#fff}
.admin-main{padding:24px}
.panel{background:#fff;border:1px solid var(--border);border-radius:12px;padding:18px;margin-bottom:18px}
.stat-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.stat{background:#fff;border:1px solid var(--border);border-radius:12px;padding:16px}
.stat .num{font-size:26px;font-weight:700;color:var(--primary)}
.stat .lab{color:var(--text-2);font-size:13px;margin-top:4px}
table.data{width:100%;border-collapse:collapse;background:#fff;border:1px solid var(--border);border-radius:10px;overflow:hidden;font-size:14px}
table.data th,table.data td{padding:11px 12px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top}
table.data tr:last-child td{border-bottom:none}
.badge{display:inline-block;padding:2px 9px;border-radius:20px;font-size:12px;font-weight:600}
.badge.ok{background:#e6f6ec;color:var(--success)}
.badge.wait{background:#fff3e0;color:#c77700}
.badge.no{background:#fdeaea;color:var(--danger)}
.tabs{display:flex;gap:6px;border-bottom:1px solid var(--border);margin-bottom:18px;flex-wrap:wrap}
.tabs button{background:none;border:none;padding:10px 14px;font-size:14px;color:var(--text-2);border-bottom:2px solid transparent}
.tabs button.active{color:var(--primary);border-bottom-color:var(--primary);font-weight:600}
.admin-login{max-width:380px;margin:8vh auto 0}

/* misc */
.toast{position:fixed;left:50%;bottom:32px;transform:translateX(-50%) translateY(20px);background:#1f2733;color:#fff;padding:12px 20px;border-radius:10px;font-size:14px;opacity:0;pointer-events:none;transition:.25s;z-index:100}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}
.pill{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--text-2)}
.divider{height:1px;background:var(--border);margin:22px 0}
.disclaimer{font-size:12.5px;color:var(--text-3);margin-top:14px;padding:12px 14px;background:var(--bg);border:1px solid var(--border);border-radius:9px;line-height:1.7}
.idcard-box{display:flex;gap:18px;flex-wrap:wrap}
.idcard-box .ic{border:1px solid var(--border);border-radius:10px;padding:10px;background:var(--bg);text-align:center}
.idcard-box .ic img{max-width:240px;border-radius:6px}
.idcard-box .ic .cap{font-size:12px;color:var(--text-3);margin-top:6px}

@media (max-width:1080px){
  .detail{grid-template-columns:minmax(0,1fr) minmax(0,1fr)}
  .shop-side{grid-column:1 / -1}
}
@media (max-width:980px){
  .grid.cards{grid-template-columns:repeat(2,1fr)}
  .grid.info{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .split{grid-template-columns:1fr}
  .detail{grid-template-columns:1fr}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .admin-shell{grid-template-columns:1fr}
  .admin-side{display:flex;overflow:auto}
  .admin-side .a-brand{display:none}
}
@media (max-width:680px){
  .nav{display:none;position:absolute;top:var(--header-h);left:0;right:0;background:#fff;border-bottom:1px solid var(--border);flex-direction:column;padding:8px}
  .nav.open{display:flex}
  .hamburger{display:inline-flex}
  .header-right .label{display:none}
  .modules{grid-template-columns:1fr}
  .kv{grid-template-columns:1fr}
  .grid.cards,.grid.info{grid-template-columns:1fr}
}