:root{
  --primary:#2563eb;
  --primary-dark:#1d4ed8;
  --accent:#ff6a00;
  --accent-dark:#e05d00;
  --price:#e02020;
  --bg:#f5f6f8;
  --card:#fff;
  --text:#1f2937;
  --muted:#6b7280;
  --line:#e5e7eb;
  --radius:10px;
  --shadow:0 1px 3px rgba(0,0,0,.08),0 1px 2px rgba(0,0,0,.04);
  --shadow-lg:0 6px 20px rgba(0,0,0,.10);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.6}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
.container{max-width:1200px;margin:0 auto;padding:0 16px}

/* ===== 顶部通知条 ===== */
.topbar{background:#0f172a;color:#cbd5e1;font-size:12px}
.topbar .container{display:flex;justify-content:space-between;padding-top:6px;padding-bottom:6px}
.topbar a{color:#e2e8f0}
.topbar a:hover{color:#fff}

/* ===== 主头部 ===== */
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:100}
.header-inner{display:flex;align-items:center;gap:24px;height:68px}
.logo{display:flex;align-items:center;gap:10px}
.logo-mark{width:40px;height:40px;border-radius:9px;background:linear-gradient(135deg,var(--primary),#4f7cff);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:20px;flex-shrink:0}
.logo-text b{font-size:19px;color:#111827;letter-spacing:.5px;display:block;line-height:1.1}
.logo-text span{font-size:11px;color:var(--muted);letter-spacing:1px}
.main-nav{display:flex;gap:4px}
.main-nav a{padding:8px 14px;border-radius:8px;font-size:15px;color:#374151;font-weight:500}
.main-nav a:hover,.main-nav a.active{color:var(--primary);background:#eff6ff}
.header-search{flex:1;display:flex;max-width:340px}
.header-search input{flex:1;border:1px solid var(--line);border-left:none;padding:9px 12px;font-size:14px;outline:none;border-radius:0 8px 8px 0}
.header-search button{border:1px solid var(--primary);background:var(--primary);color:#fff;padding:0 18px;border-radius:0 8px 8px 0}
.header-actions{display:flex;align-items:center;gap:6px}
.hbtn{position:relative;padding:8px 12px;border-radius:8px;color:#374151;font-size:14px;display:flex;align-items:center;gap:6px}
.hbtn:hover{background:#f3f4f6;color:var(--primary)}
.hbtn .badge{position:absolute;top:2px;right:4px;background:var(--price);color:#fff;font-size:11px;border-radius:10px;padding:0 6px;min-width:18px;text-align:center}
.hbtn.user{border:1px solid var(--line);border-radius:20px;padding:6px 14px}
.btn{padding:10px 20px;border-radius:8px;font-size:14px;font-weight:600;transition:.2s}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-dark)}
.btn-outline{background:#fff;border:1px solid var(--line);color:#374151}
.btn-outline:hover{border-color:var(--primary);color:var(--primary)}
.btn-lg{padding:14px 32px;font-size:16px;border-radius:10px}
.btn-block{width:100%}
.btn:disabled{opacity:.6;cursor:not-allowed}

/* ===== 分类下拉 ===== */
.cat-drop{position:relative}
.cat-drop .cat-panel{position:absolute;top:100%;left:0;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow-lg);padding:14px;min-width:560px;display:none;grid-template-columns:repeat(3,1fr);gap:6px;z-index:200}
.cat-drop:hover .cat-panel{display:grid}
.cat-panel a{padding:8px 10px;border-radius:8px;font-size:14px;color:#374151}
.cat-panel a:hover{background:#eff6ff;color:var(--primary)}

/* ===== Hero / Banner ===== */
.hero{position:relative;background:#eef4ff;overflow:hidden}
.hero img{width:100%;height:auto;max-height:360px;object-fit:cover}
.hero .hero-txt{position:absolute;left:7%;top:50%;transform:translateY(-50%);max-width:440px}
.hero .hero-txt h1{font-size:34px;color:#0f172a;margin-bottom:10px}
.hero .hero-txt p{color:#475569;font-size:15px;margin-bottom:18px}
.hero .hero-txt .btn{font-size:16px;padding:13px 30px}
@media(max-width:768px){.hero .hero-txt{left:5%;max-width:70%}.hero .hero-txt h1{font-size:22px}}

/* ===== 通用区块 ===== */
.section{padding:28px 0}
.section-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.section-head h2{font-size:21px;color:#111827;display:flex;align-items:center;gap:10px}
.section-head h2::before{content:"";width:4px;height:20px;background:var(--primary);border-radius:2px}
.section-head .more{font-size:14px;color:var(--muted)}
.section-head .more:hover{color:var(--primary)}
.section-title{text-align:center;margin:34px 0 6px;font-size:24px;color:#111827}
.section-sub{text-align:center;color:var(--muted);font-size:14px;margin-bottom:22px}

/* ===== 分类卡片 ===== */
.cat-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.cat-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 10px;text-align:center;box-shadow:var(--shadow);transition:.2s}
.cat-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--primary)}
.cat-card .ico{width:54px;height:54px;margin:0 auto 10px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:26px}
.cat-card b{display:block;font-size:14px;color:#111827}
.cat-card span{font-size:12px;color:var(--muted)}
@media(max-width:768px){.cat-grid{grid-template-columns:repeat(3,1fr)}}

/* ===== 商品卡片 ===== */
.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
@media(max-width:992px){.prod-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:640px){.prod-grid{grid-template-columns:repeat(2,1fr)}}
.prod-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.2s;position:relative;display:flex;flex-direction:column}
.prod-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.prod-img{position:relative;padding-top:100%;background:#fff;overflow:hidden}
.prod-img img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;transition:.3s}
.prod-card:hover .prod-img img{transform:scale(1.05)}
.prod-tag{position:absolute;top:10px;left:10px;z-index:2;display:flex;gap:6px}
.tag{font-size:11px;padding:2px 8px;border-radius:4px;color:#fff}
.tag.hot{background:var(--accent)}
.tag.new{background:var(--primary)}
.prod-info{padding:12px 14px 14px;display:flex;flex-direction:column;gap:6px;flex:1}
.prod-name{font-size:14px;color:#111827;height:44px;line-height:22px;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.prod-price{display:flex;align-items:baseline;gap:6px;margin-top:auto}
.prod-price .now{font-size:19px;color:var(--price);font-weight:700}
.prod-price .now i{font-style:normal;font-size:13px}
.prod-price .old{font-size:12px;color:#9ca3af;text-decoration:line-through}
.prod-bottom{display:flex;align-items:center;justify-content:space-between}
.prod-sales{font-size:12px;color:var(--muted)}
.prod-add{width:32px;height:32px;border-radius:8px;background:#eff6ff;color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:700}
.prod-add:hover{background:var(--primary);color:#fff}

/* ===== 商品列表工具条 ===== */
.list-toolbar{display:flex;align-items:center;gap:10px;margin-bottom:18px;flex-wrap:wrap}
.sort-btn{padding:7px 16px;border:1px solid var(--line);border-radius:20px;background:#fff;font-size:14px;color:#374151}
.sort-btn:hover{border-color:var(--primary);color:var(--primary)}
.sort-btn.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.list-count{color:var(--muted);font-size:14px;margin-left:auto}

/* ===== 面包屑 ===== */
.breadcrumb{font-size:13px;color:var(--muted);padding:16px 0}
.breadcrumb a:hover{color:var(--primary)}

/* ===== 商品详情 ===== */
.detail{display:grid;grid-template-columns:380px 1fr;gap:34px;background:#fff;padding:26px;border-radius:var(--radius);box-shadow:var(--shadow)}
.detail-gallery .main-img{width:100%;aspect-ratio:1;border-radius:10px;overflow:hidden;border:1px solid var(--line)}
.detail-gallery .main-img img{width:100%;height:100%;object-fit:cover}
.detail-info h1{font-size:22px;color:#111827;margin-bottom:10px;line-height:1.4}
.detail-sub{color:var(--muted);font-size:14px;margin-bottom:16px}
.price-box{background:#fff7ed;border:1px solid #fed7aa;border-radius:10px;padding:16px;display:flex;align-items:center;gap:14px;margin-bottom:16px}
.price-box .now{font-size:30px;color:var(--price);font-weight:800}
.price-box .now i{font-style:normal;font-size:16px}
.price-box .old{font-size:14px;color:#9ca3af;text-decoration:line-through}
.price-box .sold{font-size:13px;color:var(--muted);margin-left:auto}
.detail-meta{font-size:14px;color:#4b5563;margin-bottom:12px}
.detail-meta span{color:#111827}
.spec-row{display:flex;align-items:center;gap:12px;margin:14px 0}
.spec-row .label{color:var(--muted);font-size:14px;min-width:64px}
.stepper{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:8px;overflow:hidden}
.stepper button{width:36px;height:38px;font-size:18px;background:#f9fafb;color:#374151}
.stepper button:hover{background:#e5e7eb}
.stepper input{width:50px;height:38px;border:none;text-align:center;font-size:15px;outline:none}
.detail-actions{display:flex;gap:12px;margin-top:22px}
@media(max-width:768px){.detail{grid-template-columns:1fr;padding:16px}}

/* ===== 购物车 ===== */
.cart-empty{text-align:center;padding:80px 20px;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow)}
.cart-empty .big{font-size:60px}
.cart-empty p{color:var(--muted);margin:14px 0 20px}
.cart-list{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.cart-item{display:flex;align-items:center;gap:16px;padding:16px 20px;border-bottom:1px solid var(--line)}
.cart-item img{width:84px;height:84px;object-fit:cover;border-radius:8px}
.cart-item .ci-name{flex:1;font-size:15px;color:#111827}
.cart-item .ci-price{font-size:16px;color:var(--price);font-weight:700;min-width:90px}
.cart-summary{display:flex;align-items:center;justify-content:flex-end;gap:20px;padding:18px 24px;background:#fff}
.cart-summary .total{font-size:15px;color:#374151}
.cart-summary .total b{font-size:24px;color:var(--price)}
@media(max-width:640px){.cart-item{flex-wrap:wrap}}

/* ===== 结算页 ===== */
.checkout-grid{display:grid;grid-template-columns:1fr 380px;gap:20px}
@media(max-width:900px){.checkout-grid{grid-template-columns:1fr}}
.checkout-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}
.checkout-card h3{font-size:16px;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--line);color:#111827}
.fields{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.field{display:flex;flex-direction:column;gap:6px}
.field label{font-size:13px;color:var(--muted)}
.field input,.field textarea,.field select{padding:11px 13px;border:1px solid var(--line);border-radius:8px;font-size:14px;outline:none;font-family:inherit}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--primary)}
.field.full{grid-column:1/-1}
.pay-method{border:1px solid var(--line);border-radius:10px;padding:14px;display:flex;align-items:center;gap:12px;cursor:pointer;margin-bottom:10px}
.pay-method.selected{border-color:var(--primary);background:#eff6ff}
.pay-method .radio{width:18px;height:18px;border:2px solid #cbd5e1;border-radius:50%;position:relative}
.pay-method.selected .radio{border-color:var(--primary)}
.pay-method.selected .radio::after{content:"";position:absolute;inset:3px;background:var(--primary);border-radius:50%}
.pay-method b{font-size:15px}
.pay-method span{font-size:13px;color:var(--muted)}
.pay-method .logo{font-size:22px}
.order-rows{border-bottom:1px solid var(--line);padding:8px 0;display:flex;justify-content:space-between;font-size:14px;color:#4b5563}
.order-rows:last-child{border-bottom:none}
.grand-total{display:flex;justify-content:space-between;align-items:center;padding-top:12px;margin-top:6px;border-top:1px dashed var(--line)}
.grand-total b{font-size:24px;color:var(--price)}

/* ===== 支付结果 ===== */
.result-card{max-width:560px;margin:50px auto;background:#fff;border-radius:14px;box-shadow:var(--shadow-lg);text-align:center;padding:50px 40px}
.result-card .r-ico{font-size:64px}
.result-card h2{font-size:22px;margin:16px 0 8px}
.result-card p{color:var(--muted);margin-bottom:24px}
.result-card .amount{font-size:20px;color:var(--price);font-weight:700}

/* ===== 认证页 ===== */
.auth-wrap{min-height:80vh;display:flex;align-items:center;justify-content:center;padding:40px 16px}
.auth-card{background:#fff;border-radius:14px;box-shadow:var(--shadow-lg);width:400px;padding:36px}
.auth-card h1{text-align:center;font-size:22px;margin-bottom:6px}
.auth-card .sub{text-align:center;color:var(--muted);font-size:14px;margin-bottom:24px}
.auth-card .field{margin-bottom:16px}
.auth-card .foot{text-align:center;font-size:14px;color:var(--muted);margin-top:16px}
.auth-card .foot a{color:var(--primary)}

/* ===== 关于/联系 ===== */
.page-hero{background:linear-gradient(120deg,#1e3a8a,#2563eb);color:#fff;padding:44px 0;text-align:center}
.page-hero h1{font-size:28px;margin-bottom:8px}
.page-hero p{color:#dbeafe;font-size:15px}
.page-card{background:#fff;border-radius:var(--radius);box-shadow:var(--shadow);padding:28px;margin:20px 0}
.page-card h3{font-size:18px;color:#111827;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.page-card h3::before{content:"";width:4px;height:18px;background:var(--primary);border-radius:2px}
.page-card p{color:#4b5563;margin-bottom:10px;line-height:1.9}
.biz-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:6px}
@media(max-width:768px){.biz-grid{grid-template-columns:repeat(2,1fr)}}
.biz-item{background:#f8fafc;border:1px solid var(--line);border-radius:10px;padding:16px;text-align:center}
.biz-item .ico{font-size:26px;margin-bottom:6px}
.biz-item b{font-size:14px;color:#111827;display:block}
.biz-item span{font-size:12px;color:var(--muted)}
.info-list{font-size:14px;color:#374151}
.info-list li{padding:8px 0;border-bottom:1px dashed var(--line);display:flex;gap:8px}
.info-list li b{color:#111827;min-width:110px}

/* ===== 页脚 ===== */
.site-footer{background:#0f172a;color:#94a3b8;margin-top:40px}
.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:30px;padding:40px 0 24px}
.footer-inner h4{color:#e2e8f0;font-size:15px;margin-bottom:14px}
.footer-inner a{display:block;padding:4px 0;font-size:13px;color:#94a3b8}
.footer-inner a:hover{color:#fff}
.footer-inner .flogo{font-size:20px;color:#fff;font-weight:700;margin-bottom:10px}
.footer-inner p{font-size:13px;line-height:1.8}
.footer-bottom{border-top:1px solid #1f2937;padding:16px 0;text-align:center;font-size:12px;color:#64748b}

/* ===== 通用工具 ===== */
.empty{text-align:center;padding:60px 20px;color:var(--muted)}
.pagination{display:flex;justify-content:center;gap:8px;margin:26px 0}
.pagination button{padding:8px 14px;border:1px solid var(--line);background:#fff;border-radius:8px;font-size:14px;color:#374151}
.pagination button.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.pagination button:disabled{opacity:.5;cursor:not-allowed}
.loading{text-align:center;padding:50px;color:var(--muted)}
.loading .spin{display:inline-block;width:34px;height:34px;border:3px solid #e5e7eb;border-top-color:var(--primary);border-radius:50%;animation:spin 1s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.toast{position:fixed;top:20px;left:50%;transform:translateX(-50%);background:#111827;color:#fff;padding:12px 24px;border-radius:8px;z-index:999;box-shadow:var(--shadow-lg);font-size:14px;animation:slideDown .25s}
.toast.success{background:#059669}
.toast.error{background:#dc2626}
@keyframes slideDown{from{opacity:0;transform:translate(-50%,-10px)}to{opacity:1;transform:translate(-50%,0)}}
.mt-1{margin-top:10px}.mt-2{margin-top:20px}.mb-2{margin-bottom:20px}
.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:14px}