:root{
  --primary:#c8102e;
  --primary-dark:#a00d25;
  --dark:#1a1a2e;
  --gray:#f5f5f7;
  --border:#e8e8ed;
  --text:#333;
  --muted:#888;
  --success:#16a34a;
  --warn:#d97706;
  --danger:#dc2626;
  --radius:10px;
  --shadow:0 2px 12px rgba(0,0,0,.06);
  --shadow-lg:0 6px 24px rgba(0,0,0,.1);
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"PingFang SC","Microsoft YaHei",-apple-system,Segoe UI,Roboto,sans-serif;color:var(--text);background:#fff;line-height:1.6}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
button{cursor:pointer;font-family:inherit}

.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ===== 顶部公告 ===== */
.topbar{background:var(--dark);color:#fff;font-size:13px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:36px}
.topbar a{color:#ccc;margin-left:16px}
.topbar a:hover{color:#fff}
.announce{overflow:hidden;white-space:nowrap;text-overflow:ellipsis;max-width:600px}

/* ===== 头部 ===== */
.header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}
.header .container{display:flex;align-items:center;height:76px;gap:28px}
.logo{display:flex;align-items:center;gap:10px}
.logo .mark{width:42px;height:42px;background:linear-gradient(135deg,var(--primary),#e04056);border-radius:10px;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:20px;box-shadow:var(--shadow)}
.logo .name{font-size:22px;font-weight:800;color:var(--dark)}
.logo .name b{color:var(--primary)}
.logo .sub{font-size:11px;color:var(--muted);letter-spacing:1px}
.search{flex:1;display:flex;max-width:520px;margin:0 auto}
.search input{flex:1;height:42px;border:2px solid var(--primary);border-radius:21px 0 0 21px;padding:0 18px;font-size:14px;outline:none}
.search button{width:84px;height:42px;background:var(--primary);color:#fff;border:none;border-radius:0 21px 21px 0;font-size:15px;font-weight:600}
.nav-icons{display:flex;gap:18px}
.nav-icons .ic{text-align:center;font-size:12px;color:var(--muted);position:relative}
.nav-icons .ic .em{font-size:22px}
.nav-icons .ic:hover{color:var(--primary)}
.cart-count{position:absolute;top:-6px;right:-8px;background:var(--primary);color:#fff;font-size:11px;min-width:18px;height:18px;border-radius:9px;display:flex;align-items:center;justify-content:center;padding:0 4px}

/* ===== 主导航 ===== */
.nav{background:var(--dark);color:#fff}
.nav .container{display:flex;align-items:center;height:46px}
.nav .all{background:var(--primary);height:46px;padding:0 26px;display:flex;align-items:center;font-weight:700;color:#fff}
.nav-links{display:flex;gap:4px;flex:1}
.nav-links a{padding:0 18px;height:46px;line-height:46px;font-size:15px}
.nav-links a:hover,.nav-links a.active{background:rgba(255,255,255,.12)}

/* ===== 轮播 ===== */
.banner{background:linear-gradient(135deg,var(--dark),#2d2d4a);color:#fff;padding:0}
.banner .container{display:flex;gap:24px;padding:20px}
.cat-rail{width:220px;background:rgba(255,255,255,.05);border-radius:var(--radius);padding:10px 0}
.cat-rail a{display:flex;align-items:center;gap:12px;padding:11px 18px;color:#e0e0e0;font-size:14px}
.cat-rail a:hover{background:rgba(255,255,255,.1);color:#fff}
.cat-rail a .em{font-size:20px}
.banner-main{flex:1;border-radius:var(--radius);overflow:hidden;position:relative;min-height:300px;background:linear-gradient(135deg,var(--primary),#f27059);display:flex;flex-direction:column;justify-content:center;padding:40px}
.banner-main h1{font-size:38px;font-weight:800;margin-bottom:10px}
.banner-main p{font-size:16px;opacity:.9;max-width:420px}
.banner-main .cta{display:inline-block;margin-top:24px;background:#fff;color:var(--primary);padding:10px 28px;border-radius:24px;font-weight:700;font-size:15px}

/* ===== 区块 ===== */
.section{padding:28px 0}
.section-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}
.section-head h2{font-size:22px;font-weight:800;color:var(--dark)}
.section-head h2::before{content:"";display:inline-block;width:5px;height:20px;background:var(--primary);border-radius:3px;margin-right:10px;vertical-align:-2px}
.section-head a{color:var(--primary);font-size:14px}

/* ===== 商品卡片 ===== */
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.grid.g5{grid-template-columns:repeat(5,1fr)}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:.25s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.card .thumb{aspect-ratio:1;background:var(--gray);display:flex;align-items:center;justify-content:center;font-size:56px;overflow:hidden}
.card .thumb img{width:100%;height:100%;object-fit:cover}
.card .tag{position:absolute;background:var(--primary);color:#fff;font-size:12px;padding:2px 10px;border-radius:0 0 8px 0}
.card .info{padding:14px}
.card .info .nm{font-weight:600;font-size:15px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.card .info .sub{color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin:4px 0 10px}
.card .info .row{display:flex;justify-content:space-between;align-items:center}
.price{color:var(--primary);font-weight:800;font-size:18px}
.price small{font-size:12px;font-weight:600}
.price .orig{color:var(--muted);font-size:12px;text-decoration:line-through;font-weight:400;margin-left:6px}
.sales{color:var(--muted);font-size:12px}
.card .addbtn{background:var(--primary);color:#fff;border:none;width:30px;height:30px;border-radius:8px;font-size:18px;line-height:1}

/* ===== 按钮/表单 ===== */
.btn{display:inline-block;padding:10px 22px;border:none;border-radius:22px;background:var(--primary);color:#fff;font-size:14px;font-weight:600;transition:.2s;text-align:center}
.btn:hover{background:var(--primary-dark)}
.btn.outline{background:#fff;color:var(--primary);border:1.5px solid var(--primary)}
.btn.dark{background:var(--dark)}
.btn.gray{background:var(--gray);color:var(--text)}
.btn.sm{padding:6px 14px;font-size:13px;border-radius:16px}
.input{width:100%;height:44px;border:1.5px solid var(--border);border-radius:8px;padding:0 14px;font-size:14px;outline:none;transition:.2s}
.input:focus{border-color:var(--primary)}
textarea.input{height:auto;padding:12px;resize:vertical}

/* ===== 面包屑/筛选 ===== */
.crumb{padding:16px 0;color:var(--muted);font-size:14px}
.crumb b{color:var(--text)}
.filter-bar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding:14px;background:var(--gray);border-radius:var(--radius);margin-bottom:20px}
.filter-bar .chip{padding:6px 16px;background:#fff;border:1px solid var(--border);border-radius:16px;font-size:13px;cursor:pointer}
.filter-bar .chip.on{background:var(--primary);color:#fff;border-color:var(--primary)}

/* ===== 商品详情 ===== */
.detail{display:flex;gap:40px;padding:30px 0}
.detail .dpic{width:420px;flex-shrink:0}
.detail .dpic .main{aspect-ratio:1;background:var(--gray);border-radius:var(--radius);display:flex;align-items:center;justify-content:center;font-size:120px;overflow:hidden;position:relative}
.detail .dpic .main img{width:100%;height:100%;object-fit:cover}
.detail .dinfo{flex:1}
.detail .dinfo h1{font-size:26px;font-weight:800;color:var(--dark)}
.detail .dinfo .sub{color:var(--muted);margin:8px 0 16px}
.price-box{background:var(--gray);border-radius:var(--radius);padding:18px;margin-bottom:20px}
.price-box .price{font-size:32px}
.price-box .orig{font-size:16px;text-decoration:line-through;color:var(--muted);margin-left:12px}
.meta{display:flex;gap:30px;margin:16px 0;font-size:14px;color:var(--muted)}
.meta b{color:var(--text)}
.qty{display:flex;align-items:center;gap:0;margin:20px 0}
.qty .qbtn{width:40px;height:40px;border:1.5px solid var(--border);background:#fff;font-size:20px}
.qty input{width:70px;height:40px;border-top:1.5px solid var(--border);border-bottom:1.5px solid var(--border);border-left:none;border-right:none;text-align:center;outline:none}
.actions{display:flex;gap:14px}
.actions .btn{padding:12px 32px;font-size:16px;border-radius:8px}
.spec-box{border:1.5px solid var(--border);border-radius:var(--radius);padding:18px;margin:20px 0}
.spec-box h4{margin-bottom:10px;color:var(--dark)}
.spec-list{font-size:14px;color:var(--muted)}
.desc{padding:20px 0;border-top:1px solid var(--border);margin-top:20px}
.desc h3{margin-bottom:14px;color:var(--dark);font-size:20px}
.desc p{white-space:pre-wrap;color:#555}

/* ===== 购物车/订单 ===== */
.cart-table{width:100%;border-collapse:collapse}
.cart-table th{background:var(--gray);padding:14px;font-size:14px;color:var(--muted);text-align:left}
.cart-table td{padding:16px 14px;border-bottom:1px solid var(--border);vertical-align:middle}
.cart-item{display:flex;align-items:center;gap:14px}
.cart-item .pic{width:70px;height:70px;background:var(--gray);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:30px;overflow:hidden}
.cart-item .pic img{width:100%;height:100%;object-fit:cover}
.cart-item .nm{font-weight:600}
.cart-summary{background:var(--gray);border-radius:var(--radius);padding:20px;position:sticky;top:90px}
.cart-summary .r{display:flex;justify-content:space-between;margin:8px 0;color:var(--muted)}
.cart-summary .t{font-size:18px;color:var(--dark);font-weight:700}
.cart-layout{display:grid;grid-template-columns:1fr 320px;gap:24px}

/* ===== 订单卡片 ===== */
.order-card{border:1px solid var(--border);border-radius:var(--radius);margin-bottom:16px;overflow:hidden}
.order-hd{display:flex;justify-content:space-between;padding:12px 18px;background:var(--gray);font-size:13px;color:var(--muted)}
.order-hd .no{color:var(--text);font-weight:600}
.order-items{padding:14px 18px}
.order-item{display:flex;align-items:center;gap:14px;padding:8px 0}
.order-item .pic{width:56px;height:56px;background:var(--gray);border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:26px;overflow:hidden}
.order-item .pic img{width:100%;height:100%;object-fit:cover}
.order-item .nm{font-weight:600}
.order-ft{display:flex;justify-content:space-between;align-items:center;padding:12px 18px;border-top:1px solid var(--border)}
.status-pill{padding:3px 12px;border-radius:12px;font-size:12px}
.st-pending{background:#fef3c7;color:var(--warn)}
.st-paid{background:#dbeafe;color:#1d4ed8}
.st-shipped{background:#ede9fe;color:#6d28d9}
.st-completed{background:#dcfce7;color:var(--success)}
.st-cancelled{background:#fee2e2;color:var(--danger)}

/* ===== 用户/登录 ===== */
.auth-wrap{min-height:70vh;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#f5f5f7,#e8e8ee);padding:40px 0}
.auth-box{background:#fff;border-radius:16px;box-shadow:var(--shadow-lg);padding:40px;width:400px}
.auth-box h2{text-align:center;margin-bottom:26px;color:var(--dark)}
.auth-box .input{margin-bottom:16px}
.auth-box .btn{width:100%;margin-top:6px}
.auth-switch{text-align:center;margin-top:18px;font-size:14px;color:var(--muted)}
.auth-switch a{color:var(--primary)}
.form-line{margin-bottom:16px}
.form-line label{display:block;font-size:14px;color:var(--muted);margin-bottom:6px}

/* ===== 页脚 ===== */
.footer{background:var(--dark);color:#ccc;padding:40px 0 20px;margin-top:40px}
.footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.footer h4{color:#fff;margin-bottom:14px}
.footer a{display:block;color:#bbb;font-size:13px;margin-bottom:8px}
.footer a:hover{color:#fff}
.footer .copy{text-align:center;border-top:1px solid rgba(255,255,255,.1);padding-top:18px;font-size:12px;color:#888}

/* ===== Toast ===== */
#toast{position:fixed;top:20px;left:50%;transform:translateX(-50%) translateY(-100px);background:var(--dark);color:#fff;padding:12px 26px;border-radius:8px;z-index:9999;opacity:0;transition:.3s;box-shadow:var(--shadow-lg);font-size:14px}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* 提示: 商品无图emoji映射 */
.emoji-ph{font-size:56px}

/* 空态 */
.empty{text-align:center;padding:60px 20px;color:var(--muted)}
.empty .em{font-size:64px;display:block;margin-bottom:16px}
.empty .btn{margin-top:16px}

@media(max-width:900px){
  .grid{grid-template-columns:repeat(2,1fr)}
  .banner .container{flex-direction:column}
  .cat-rail{width:100%}
  .detail{flex-direction:column}
  .detail .dpic{width:100%}
  .cart-layout{grid-template-columns:1fr}
  .footer .cols{grid-template-columns:1fr 1fr}
  .nav-links{display:none}
}