/* ============================================================
   TechTrade 前台样式 - 高端数码外贸商城
   ============================================================ */
:root{
  --dark:#0b1220; --navy:#0f172a; --dark2:#111d33;
  --accent:#2563eb; --accent-d:#1d4ed8; --accent-l:#60a5fa;
  --amber:#f59e0b; --green:#16a34a; --red:#dc2626;
  --bg:#f3f6fa; --line:#e5e9f0; --txt:#1f2937; --mut:#6b7280;
  --radius:10px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{font-family:"Segoe UI",Helvetica,Arial,sans-serif;background:var(--bg);color:var(--txt);font-size:15px;line-height:1.6}
a{text-decoration:none;color:var(--accent)}
img{max-width:100%}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ---------- 顶栏 ---------- */
.topbar{background:var(--dark);color:#cbd5e1;font-size:12.5px;padding:7px 0}
.topbar .container{display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}
.topbar a{color:#e2e8f0}
.topbar a:hover{color:#fff}
.topbar .tb-r span{margin-left:14px}
.topbar .tb-r .sep{opacity:.4}

/* ---------- 主头部 ---------- */
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:120}
.site-header .container{display:flex;align-items:center;height:66px;gap:18px}
.logo{font-size:21px;font-weight:800;color:var(--dark);letter-spacing:-.3px;white-space:nowrap}
.logo svg{vertical-align:-4px;margin-right:6px;width:24px;height:24px}
.logo .acc{color:var(--accent)}
.nav{display:flex;gap:2px;flex:1;overflow-x:auto;scrollbar-width:none}
.nav::-webkit-scrollbar{display:none}
.nav a{padding:6px 8px;color:#475569;font-size:13.8px;border-radius:6px;white-space:nowrap}
.nav a:hover{color:var(--accent);background:#eef4ff}
.nav a.active{color:var(--accent);font-weight:600;background:#eef4ff}
.h-search{display:flex;align-items:center;background:var(--bg);border:1px solid var(--line);border-radius:30px;padding:3px 4px 3px 14px;width:200px;transition:border .2s}
.h-search:focus-within{border-color:var(--accent);background:#fff}
.h-search input{border:none;outline:none;background:none;flex:1;font-size:13.5px;color:var(--txt);min-width:0}
.h-search button{border:none;background:var(--accent);color:#fff;border-radius:20px;padding:7px 16px;font-size:13px;cursor:pointer;white-space:nowrap}
.h-search button:hover{background:var(--accent-d)}
.h-actions{display:flex;align-items:center;gap:16px;white-space:nowrap}
.cart-link{position:relative;display:flex;align-items:center;color:#334155;font-size:14px;gap:6px;padding:6px 2px}
.cart-link:hover{color:var(--accent)}
.cart-link svg{vertical-align:-3px}
.cart-badge{position:absolute;top:-2px;right:-9px;background:var(--red);color:#fff;font-size:11px;min-width:18px;height:18px;line-height:18px;border-radius:9px;text-align:center;padding:0 4px;font-weight:700}
.user-link{color:#334155;font-size:14px}
.user-link:hover{color:var(--accent)}
.btn-login{border:1px solid var(--line);padding:6px 14px;border-radius:6px;color:#334155;font-size:13.5px;background:#fff}
.btn-login:hover{border-color:var(--accent);color:var(--accent)}

/* ---------- 按钮 ---------- */
.btn{display:inline-block;background:var(--accent);color:#fff;padding:11px 24px;border-radius:6px;font-size:14.5px;border:none;cursor:pointer;text-align:center;font-family:inherit}
.btn:hover{background:var(--accent-d);color:#fff}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn-block{display:block;width:100%}
.btn-ghost{background:transparent;border:1px solid var(--accent);color:var(--accent)}
.btn-ghost:hover{background:var(--accent);color:#fff}
.btn-lg{padding:13px 32px;font-size:16px;border-radius:8px}
.btn-sm{padding:6px 14px;font-size:13px;border-radius:5px}
.btn-dark{background:var(--dark)}
.btn-dark:hover{background:#1c2a44}
.btn-amber{background:var(--amber);color:#fff}
.btn-amber:hover{background:#d97706;color:#fff}

/* ---------- 区块标题 ---------- */
.sec-title{font-size:22px;font-weight:700;color:var(--dark);margin:40px 0 20px;display:flex;align-items:center;gap:10px}
.sec-title::before{content:"";width:4px;height:22px;background:var(--accent);border-radius:2px}
.sec-title .more{margin-left:auto;font-size:13.5px;font-weight:400;color:var(--mut)}
.sec-title .more:hover{color:var(--accent)}

/* ---------- 商品网格 / 卡片 ---------- */
.p-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.p-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.22s;position:relative;display:flex;flex-direction:column}
.p-card:hover{transform:translateY(-4px);box-shadow:0 14px 32px rgba(15,23,42,.13);border-color:#d4dceb}
.p-card .pic{height:215px;background:#f8fafc;position:relative;overflow:hidden}
.p-card .pic img{width:100%;height:100%;object-fit:cover;transition:.35s}
.p-card:hover .pic img{transform:scale(1.05)}
.p-card .cond{position:absolute;top:10px;left:10px;z-index:2}
.p-card .pic .thumb{width:100%;height:100%;object-fit:cover}
.p-card .body{padding:13px 14px 15px;display:flex;flex-direction:column;gap:7px;flex:1}
.p-card h3{font-size:14.5px;color:var(--dark);line-height:1.4;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.p-card .spec{font-size:12.5px;color:var(--mut);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.p-card .price-row{display:flex;align-items:baseline;gap:8px;margin-top:2px}
.p-card .price{font-size:17.5px;font-weight:700;color:var(--red)}
.p-card .list-price{font-size:12.5px;color:#9aa4b2;text-decoration:line-through}
.p-card .foot{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:6px}
.p-card .stock-ok{font-size:12px;color:var(--green);font-weight:600}
.p-card .stock-no{font-size:12px;color:var(--red);font-weight:600}
.badge{font-size:11.5px;font-weight:600;padding:3px 9px;border-radius:10px;color:#fff;letter-spacing:.2px}
.badge-used{background:var(--amber)}
.badge-new{background:var(--green)}
.badge-hot{position:absolute;top:10px;right:10px;background:var(--red);z-index:2}

/* ---------- 分类磁贴 ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.cat-tile{position:relative;border-radius:var(--radius);overflow:hidden;height:150px;display:block;box-shadow:0 2px 10px rgba(15,23,42,.08);transition:.22s}
.cat-tile:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(15,23,42,.16)}
.cat-tile img{width:100%;height:100%;object-fit:cover;transition:.35s}
.cat-tile:hover img{transform:scale(1.06)}
.cat-tile .mask{position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,18,32,.05) 0%,rgba(11,18,32,.78) 100%)}
.cat-tile .name{position:absolute;left:14px;bottom:12px;color:#fff;font-size:17px;font-weight:700;text-shadow:0 1px 6px rgba(0,0,0,.35)}
.cat-tile .cnt{position:absolute;right:14px;bottom:15px;color:#dbe4f5;font-size:12px;background:rgba(255,255,255,.16);padding:2px 9px;border-radius:12px}

/* ---------- Hero ---------- */
.hero{position:relative;background:linear-gradient(115deg,#0b1220 0%,#12203c 55%,#1a2f56 100%);color:#fff;overflow:hidden}
.hero .container{position:relative;z-index:2;padding-top:78px;padding-bottom:84px;display:grid;grid-template-columns:1.15fr 1fr;gap:40px;align-items:center}
.hero .hb h1{font-size:40px;line-height:1.25;font-weight:800;letter-spacing:-.5px}
.hero .hb h1 .acc{color:var(--accent-l)}
.hero .hb p{color:#c6d2e6;font-size:16.5px;margin:16px 0 28px;max-width:520px}
.hero .searchbox{display:flex;background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 12px 34px rgba(0,0,0,.35);max-width:560px}
.hero .searchbox select{border:none;outline:none;padding:14px 14px;font-size:14px;color:#334155;background:#f1f5f9;border-right:1px solid var(--line);cursor:pointer}
.hero .searchbox input{border:none;outline:none;flex:1;padding:14px 16px;font-size:14.5px;color:var(--txt);min-width:0}
.hero .searchbox button{background:var(--accent);color:#fff;border:none;padding:14px 26px;font-size:15px;cursor:pointer;font-weight:600}
.hero .searchbox button:hover{background:var(--accent-d)}
.hero .trust{display:flex;gap:26px;margin-top:30px;flex-wrap:wrap}
.hero .trust .ti{display:flex;align-items:center;gap:9px;font-size:13.5px;color:#aebfe0}
.hero .trust svg{color:var(--amber)}
.hero .hb-img{position:relative;border-radius:14px;overflow:hidden;box-shadow:0 24px 60px rgba(0,0,0,.45);border:1px solid rgba(255,255,255,.14)}
.hero .hb-img img{width:100%;height:340px;object-fit:cover;display:block}
.hero .hb-img .tag{position:absolute;left:14px;bottom:14px;background:rgba(11,18,32,.72);color:#fff;font-size:13px;padding:7px 14px;border-radius:20px;backdrop-filter:blur(4px)}
.hero .glow{position:absolute;top:-120px;right:-80px;width:420px;height:420px;background:radial-gradient(circle,rgba(37,99,235,.35),transparent 65%)}

/* ---------- 服务亮点 ---------- */
.perks{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:44px}
.perk{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 18px;display:flex;gap:14px;align-items:flex-start;transition:.2s}
.perk:hover{box-shadow:0 10px 26px rgba(15,23,42,.1)}
.perk svg{flex:none;color:var(--accent)}
.perk h4{font-size:15px;color:var(--dark);margin-bottom:4px}
.perk p{font-size:13px;color:var(--mut);line-height:1.65}

/* ---------- 横幅（公告/促销） ---------- */
.banner-strip{background:linear-gradient(90deg,#1d4ed8,#3b82f6);color:#fff;border-radius:var(--radius);padding:16px 22px;display:flex;align-items:center;gap:14px;margin-top:44px;flex-wrap:wrap}
.banner-strip .bs-i{font-weight:700;font-size:15.5px;flex:1;min-width:240px}
.banner-strip a{color:#fff;background:rgba(255,255,255,.18);padding:8px 18px;border-radius:20px;font-size:14px}
.banner-strip a:hover{background:rgba(255,255,255,.3)}

/* ---------- 面包屑 / 页面头 ---------- */
.crumb{font-size:13px;color:var(--mut);padding:16px 0 0}
.crumb a{color:var(--mut)}
.crumb a:hover{color:var(--accent)}
.page-head{padding:26px 0 6px}
.page-head h1{font-size:26px;color:var(--dark)}
.page-head p{color:var(--mut);font-size:14px;margin-top:4px}

/* ---------- 筛选栏 ---------- */
.filter-bar{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;margin:18px 0 24px;display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.filter-bar select,.filter-bar input{padding:8px 12px;border:1px solid var(--line);border-radius:6px;font-size:13.5px;color:var(--txt);background:#fff;outline:none}
.filter-bar select:focus,.filter-bar input:focus{border-color:var(--accent)}
.filter-bar .btn{padding:8px 18px;font-size:13.5px}
.filter-bar .count{margin-left:auto;font-size:13px;color:var(--mut)}

/* ---------- 详情页 ---------- */
.detail-wrap{display:grid;grid-template-columns:1fr 1.05fr;gap:34px;margin:22px 0 20px}
.detail-img{position:relative;border-radius:var(--radius);overflow:hidden;background:#fff;border:1px solid var(--line)}
.detail-img img{width:100%;height:480px;object-fit:cover;display:block}
.detail-img .cond{position:absolute;top:14px;left:14px;z-index:2}
.gallery-thumbs{display:flex;gap:10px;margin-top:12px;flex-wrap:wrap;padding:0 12px 12px}
.gallery-thumbs .gt{width:64px;height:64px;padding:0;border:2px solid var(--line);border-radius:8px;overflow:hidden;cursor:pointer;background:#fff;transition:border-color .15s}
.gallery-thumbs .gt img{width:100%;height:100%;object-fit:cover;display:block}
.gallery-thumbs .gt:hover{border-color:var(--accent)}
.gallery-thumbs .gt.active{border-color:var(--accent);box-shadow:0 0 0 3px rgba(37,99,235,.15)}
.detail-info h1{font-size:24px;color:var(--dark);line-height:1.4}
.detail-info .spec-line{color:var(--mut);font-size:14px;margin:8px 0 14px}
.detail-info .price-row{display:flex;align-items:baseline;gap:12px;background:#fff7f7;border:1px solid #fde3e3;border-radius:8px;padding:14px 16px;margin:14px 0}
.detail-info .price{font-size:30px;font-weight:800;color:var(--red)}
.detail-info .list-price{font-size:16px;color:#9aa4b2;text-decoration:line-through}
.detail-info .save{font-size:13px;color:var(--red);background:#fee2e2;padding:2px 8px;border-radius:10px;margin-left:6px}
.detail-meta{display:grid;grid-template-columns:repeat(2,1fr);gap:10px 22px;background:var(--bg);border-radius:8px;padding:14px 16px;margin:16px 0;font-size:13.5px}
.detail-meta .m-item{display:flex;justify-content:space-between;gap:10px}
.detail-meta .m-item b{font-weight:600;color:var(--dark)}
.detail-meta .m-item .mv{color:#475569;text-align:right}
.qty-row{display:flex;align-items:center;gap:12px;margin:16px 0}
.qty-box{display:flex;align-items:center;border:1px solid var(--line);border-radius:6px;overflow:hidden}
.qty-box button{width:38px;height:42px;border:none;background:#f1f5f9;font-size:18px;cursor:pointer;color:#475569}
.qty-box button:hover{background:#e2e8f0}
.qty-box input{width:56px;height:42px;border:none;text-align:center;font-size:15px;outline:none;color:var(--txt)}
.detail-actions{display:flex;gap:12px;flex-wrap:wrap}
.stock-tip{font-size:13px;margin-top:10px}
.stock-tip.ok{color:var(--green)}
.stock-tip.no{color:var(--red)}
.detail-desc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;margin:26px 0}
.detail-desc h3{font-size:17px;color:var(--dark);margin-bottom:14px;padding-left:10px;border-left:4px solid var(--accent)}
.detail-desc p{color:#374151;font-size:14.5px;line-height:1.85;margin-bottom:10px}
.detail-desc ul{padding-left:22px;color:#374151;font-size:14.5px}
.detail-desc li{margin-bottom:7px}
.detail-desc .dl{display:grid;grid-template-columns:120px 1fr;gap:8px 16px;margin-top:14px;font-size:14px}
.detail-desc .dl dt{color:var(--mut);font-weight:600}
.detail-desc .dl dd{color:#374151}

/* ---------- 购物车 ---------- */
.cart-wrap{display:grid;grid-template-columns:1fr 330px;gap:24px;margin:22px 0;align-items:start}
.cart-list{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.cart-item{display:grid;grid-template-columns:86px 1fr auto;gap:16px;padding:16px 18px;border-bottom:1px solid var(--line);align-items:center}
.cart-item:last-child{border-bottom:none}
.cart-item img{width:86px;height:86px;object-fit:cover;border-radius:8px;background:#f8fafc}
.cart-item h4{font-size:14.5px;color:var(--dark);margin-bottom:5px}
.cart-item .cs{font-size:12.5px;color:var(--mut)}
.cart-item .cp{font-size:15.5px;font-weight:700;color:var(--red)}
.cart-item .cd{display:flex;flex-direction:column;gap:9px;align-items:flex-end}
.cart-item .qty-box button{width:30px;height:34px}
.cart-item .qty-box input{width:44px;height:34px}
.cart-remove{background:none;border:none;color:var(--mut);font-size:13px;cursor:pointer;text-decoration:underline}
.cart-remove:hover{color:var(--red)}
.cart-empty{text-align:center;padding:70px 20px;color:var(--mut)}
.cart-empty .big{font-size:52px;margin-bottom:10px}
.cart-summary{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.cart-summary h3{font-size:17px;color:var(--dark);margin-bottom:16px}
.cart-summary .row{display:flex;justify-content:space-between;font-size:14px;color:#475569;margin-bottom:10px}
.cart-summary .row.total{font-size:17px;font-weight:700;color:var(--dark);border-top:1px dashed var(--line);padding-top:12px;margin-top:4px}
.cart-summary .row.total .tv{color:var(--red)}
.cart-summary .tip{font-size:12.5px;color:var(--mut);margin:10px 0 14px;line-height:1.6}

/* ---------- 结账 ---------- */
.checkout-wrap{display:grid;grid-template-columns:1fr 380px;gap:24px;margin:22px 0;align-items:start}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.form-card h3{font-size:17px;color:var(--dark);margin-bottom:18px;padding-left:10px;border-left:4px solid var(--accent)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.form-grid .full{grid-column:1/-1}
.form-item label{display:block;font-size:13.5px;color:#475569;margin-bottom:6px;font-weight:600}
.form-item input,.form-item select,.form-item textarea{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:7px;font-size:14px;color:var(--txt);outline:none;background:#fff;font-family:inherit}
.form-item input:focus,.form-item select:focus,.form-item textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.form-item textarea{min-height:90px;resize:vertical}
.form-item .req{color:var(--red)}
.ck-order-item{display:flex;gap:12px;padding:10px 0;border-bottom:1px dashed var(--line);align-items:center}
.ck-order-item img{width:52px;height:52px;object-fit:cover;border-radius:6px;background:#f8fafc}
.ck-order-item .oi{flex:1}
.ck-order-item h5{font-size:13.5px;color:var(--dark)}
.ck-order-item .os{font-size:12px;color:var(--mut)}
.ck-order-item .op{font-size:14px;font-weight:700;color:var(--red)}

/* ---------- 登录 / 注册 / 页面 ---------- */
.auth-wrap{width:440px;max-width:94vw;margin:56px auto 70px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:34px;box-shadow:0 10px 34px rgba(15,23,42,.08)}
.auth-wrap h2{font-size:22px;color:var(--dark);text-align:center;margin-bottom:6px}
.auth-wrap .sub{text-align:center;color:var(--mut);font-size:13.5px;margin-bottom:22px}
.msg-box{background:#fef2f2;color:var(--red);border:1px solid #fecaca;padding:11px 14px;border-radius:7px;font-size:13.5px;margin-bottom:14px}
.msg-box.ok{background:#f0fdf4;color:var(--green);border-color:#bbf7d0}
.auth-link{text-align:center;margin-top:16px;font-size:13.5px;color:var(--mut)}
.auth-link a{font-weight:600}

/* ---------- 表格 / 用户中心 ---------- */
.table-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;margin:22px 0}
.table-card table{width:100%;border-collapse:collapse;table-layout:fixed}
.table-card th,.table-card td{padding:12px 14px;font-size:13.5px;text-align:left;border-bottom:1px solid var(--line);word-break:break-all}
.table-card th{background:#f8fafc;color:#475569;font-weight:600}
.table-card tr:last-child td{border-bottom:none}
.table-card td .price{color:var(--red);font-weight:700}

/* ---------- 通用页面 ---------- */
.page-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;margin:22px 0}
.page-card h3{font-size:17px;color:var(--dark);margin:18px 0 10px}
.page-card h3:first-child{margin-top:0}
.page-card p,.page-card li{color:#374151;font-size:14.5px;line-height:1.85}
.page-card ul{padding-left:22px}
.page-card li{margin-bottom:7px}
.faq-item{border:1px solid var(--line);border-radius:8px;background:#fff;margin-bottom:12px;overflow:hidden}
.faq-item summary{cursor:pointer;padding:16px 18px;font-size:15px;font-weight:600;color:var(--dark);list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq-item summary::after{content:"+";font-size:20px;color:var(--accent);font-weight:400}
.faq-item[open] summary::after{content:"–"}
.faq-item .fb{padding:0 18px 16px;color:#475569;font-size:14px;line-height:1.8}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:#9fb0c8;margin-top:60px}
.site-footer .f-top{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:34px;padding:46px 0 30px}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:16px}
.site-footer p{font-size:13.5px;line-height:1.8}
.site-footer a{color:#9fb0c8;font-size:13.5px;display:block;margin-bottom:9px}
.site-footer a:hover{color:#fff}
.site-footer .f-contact div{display:flex;gap:10px;margin-bottom:10px;font-size:13.5px;align-items:flex-start}
.site-footer .f-contact svg{flex:none;margin-top:3px;color:var(--accent-l)}
.f-bottom{border-top:1px solid rgba(255,255,255,.09);padding:16px 0;font-size:12.5px;color:#6d7d96;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}

/* ---------- Toast ---------- */
.toast{position:fixed;left:50%;bottom:34px;transform:translateX(-50%) translateY(20px);background:var(--dark);color:#fff;padding:12px 24px;border-radius:30px;font-size:14px;opacity:0;pointer-events:none;transition:.3s;z-index:999;box-shadow:0 10px 30px rgba(0,0,0,.3)}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- 响应式 ---------- */
@media (max-width:1080px){
  .p-grid{grid-template-columns:repeat(3,1fr)}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .perks{grid-template-columns:repeat(2,1fr)}
  .hero .container{grid-template-columns:1fr;padding-top:52px;padding-bottom:60px}
  .hero .hb-img{max-width:560px}
  .detail-wrap{grid-template-columns:1fr}
  .cart-wrap,.checkout-wrap{grid-template-columns:1fr}
  .h-search{width:180px}
}
@media (max-width:768px){
  .site-header .container{height:auto;flex-wrap:wrap;padding-top:10px;padding-bottom:10px;gap:10px}
  .nav{order:3;width:100%}
  .h-search{flex:1}
  .p-grid{grid-template-columns:repeat(2,1fr)}
  .hero .hb h1{font-size:29px}
  .detail-img img{height:330px}
  .form-grid{grid-template-columns:1fr}
  .site-footer .f-top{grid-template-columns:1fr 1fr;gap:26px}
}
@media (max-width:520px){
  .p-grid{grid-template-columns:1fr}
  .perks{grid-template-columns:1fr}
  .cat-grid{grid-template-columns:1fr}
  .cart-item{grid-template-columns:64px 1fr;gap:12px}
  .cart-item img{width:64px;height:64px}
  .cart-item .cd{grid-column:1/-1;flex-direction:row;justify-content:space-between;width:100%}
  .site-footer .f-top{grid-template-columns:1fr}
  .hero .searchbox{flex-wrap:wrap}
  .hero .searchbox select{width:100%;border-right:none;border-bottom:1px solid var(--line)}
  .hero .searchbox input{width:calc(100% - 90px)}
  .hero .searchbox button{width:90px}
}
/* ============================================================
   在线客服挂件
   ============================================================ */
#lcWrap{position:fixed;right:22px;bottom:22px;z-index:9000;font-family:"Segoe UI","Helvetica Neue",Arial,sans-serif}
#lcBtn{width:58px;height:58px;border-radius:50%;background:var(--accent);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 22px rgba(37,99,235,.45);transition:transform .15s ease}
#lcBtn:hover{transform:scale(1.06)}
.lc-badge{position:absolute;top:-2px;right:-2px;min-width:20px;height:20px;border-radius:10px;background:var(--red);color:#fff;font-size:12px;font-weight:700;line-height:20px;text-align:center;padding:0 5px;box-shadow:0 0 0 2px #fff}
#lcPanel{position:absolute;right:0;bottom:70px;width:340px;max-width:calc(100vw - 40px);height:460px;background:#fff;border-radius:14px;box-shadow:0 16px 48px rgba(15,23,42,.28);display:flex;flex-direction:column;overflow:hidden;transform-origin:bottom right;transition:transform .18s ease,opacity .18s ease;opacity:0;transform:translateY(12px) scale(.96);pointer-events:none}
#lcPanel.lc-open{opacity:1;transform:translateY(0) scale(1);pointer-events:auto}
.lc-head{background:var(--dark);color:#fff;padding:14px 16px;display:flex;align-items:center;gap:10px}
.lc-head b{font-size:14.5px;display:block}
.lc-head span{font-size:11.5px;color:#94a3b8}
.lc-head span::before{content:"●";color:#22c55e;margin-right:4px;font-size:9px}
.lc-end,.lc-close{margin-left:auto;background:none;border:none;color:#94a3b8;font-size:17px;cursor:pointer;line-height:1;padding:3px 6px}
.lc-end{font-size:12px;color:#cbd5e1}
.lc-end:hover,.lc-close:hover{color:#fff}
.lc-body{flex:1;display:flex;flex-direction:column;min-height:0}
.lc-start{padding:26px 20px;display:flex;flex-direction:column;gap:12px}
.lc-start p{font-size:13.5px;color:#475569;line-height:1.7;margin:0}
.lc-prod{font-size:12.5px;color:#1d4ed8;background:#eef4ff;border:1px dashed #93c5fd;border-radius:8px;padding:8px 11px;line-height:1.5}
.lc-start input{padding:11px 13px;border:1px solid #d1d5db;border-radius:8px;font-size:13.5px;outline:none}
.lc-start input:focus{border-color:var(--accent)}
.lc-go{padding:11px;border:none;border-radius:8px;background:var(--accent);color:#fff;font-size:14px;font-weight:600;cursor:pointer}
.lc-go:hover{background:var(--accent-d)}
.lc-chat{flex:1;display:flex;flex-direction:column;min-height:0}
.lc-msgs{flex:1;padding:16px;overflow-y:auto;display:flex;flex-direction:column;gap:9px;background:#f3f6fa}
.lc-bubble{max-width:78%;padding:9px 13px;border-radius:12px;font-size:13.5px;line-height:1.55;word-break:break-word;position:relative}
.lc-bubble.out{align-self:flex-end;background:var(--accent);color:#fff;border-bottom-right-radius:4px}
.lc-bubble.in{align-self:flex-start;background:#fff;border:1px solid #e5e9f0;border-bottom-left-radius:4px;color:#1f2937}
.lc-time{font-size:10.5px;opacity:.65;margin-top:3px}
.lc-ended{align-self:center;font-size:12.5px;color:#9ca3af;background:#fff;border:1px dashed #d1d5db;border-radius:8px;padding:8px 14px;margin-top:10px}
.lc-input{display:flex;gap:8px;padding:12px;border-top:1px solid #e5e9f0;background:#fff}
.lc-input input{flex:1;padding:10px 12px;border:1px solid #d1d5db;border-radius:8px;font-size:13.5px;outline:none;min-width:0}
.lc-input input:focus{border-color:var(--accent)}
.lc-input button{padding:10px 16px;border:none;border-radius:8px;background:var(--accent);color:#fff;font-size:13.5px;font-weight:600;cursor:pointer}
.lc-input button:hover{background:var(--accent-d)}
@media(max-width:640px){#lcWrap{right:14px;bottom:14px}#lcPanel{width:calc(100vw - 28px);right:0}}