:root{
  --brand:#17527E;
  --brand-light:#E8F0F7;
  --discount:#C0392B;
  --bg:#F4F6F8;
  --card:#fff;
  --text:#1F2933;
  --muted:#7B8794;
  --line:#E4E7EB;
  --ok:#27865A;
  --warn:#B7791F;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);font-size:15px;line-height:1.6;
  padding-bottom:calc(64px + env(safe-area-inset-bottom));
}
button,input,select,textarea{font-family:inherit;font-size:15px;color:inherit}

/* 顶部 */
.topbar{
  position:sticky;top:0;z-index:20;background:var(--brand);color:#fff;
  padding:calc(env(safe-area-inset-top) + 10px) 14px 10px;
}
.brand{font-size:17px;font-weight:600;letter-spacing:2px}
.identity{margin-top:6px;font-size:12.5px;opacity:.9;display:flex;align-items:center;gap:8px;min-height:20px}
.identity .who{background:rgba(255,255,255,.18);border-radius:20px;padding:2px 10px}
.identity .change{margin-left:auto;text-decoration:underline;opacity:.85;cursor:pointer}

/* 通用 */
.mask{
  position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:60;
  display:flex;align-items:flex-end;justify-content:center;
}
.mask[hidden]{display:none}
.sheet{
  background:#fff;width:100%;max-width:520px;border-radius:16px 16px 0 0;
  padding:20px 18px calc(20px + env(safe-area-inset-bottom));
  animation:up .22s ease;
}
@keyframes up{from{transform:translateY(100%)}to{transform:translateY(0)}}
.sheet h3{margin:0 0 4px;font-size:17px}
.sheet .sub{margin:0 0 14px;font-size:13px;color:var(--muted)}
.hint{min-height:20px;font-size:13px;color:var(--discount);margin:8px 0 0}
.hint.ok{color:var(--ok)}

/* 验证码行：输入框吃掉剩余宽度，按钮固定不跟着文字长短抖（"获取验证码"→"59 秒后重发"） */
.code-row{display:flex;gap:8px;margin-top:10px}
.code-row input{flex:1;min-width:0}
.code-row .btn{flex:none;white-space:nowrap;padding:0 14px;font-size:13.5px}
.code-row .btn[disabled]{opacity:.6;cursor:default}
.sheet-btns{display:flex;gap:10px;margin-top:14px}

.btn{
  border:1px solid var(--line);background:#fff;border-radius:10px;
  padding:10px 16px;cursor:pointer;font-size:15px;
}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.ghost{background:#F1F3F5}
.btn.big{padding:12px 26px;font-size:16px;border-radius:24px}
.btn:active{opacity:.82}
.btn.block{width:100%;margin-top:14px}
.btn[disabled]{opacity:.5;cursor:not-allowed}

input,select,textarea{
  width:100%;border:1px solid var(--line);border-radius:10px;
  padding:11px 12px;background:#fff;outline:none;
}
input:focus,textarea:focus,select:focus{border-color:var(--brand)}

/* 商品列表 */
.list{padding:10px 10px 0}
.card{
  background:var(--card);border-radius:12px;padding:12px;margin-bottom:10px;
  display:flex;gap:12px;align-items:center;
}
.thumb{
  width:64px;height:64px;flex:none;border-radius:8px;background:var(--brand-light);
  display:flex;align-items:center;justify-content:center;color:var(--brand);
  font-size:13px;text-align:center;padding:4px;
}
.info{flex:1;min-width:0}
.title{font-size:15.5px;font-weight:500}
.spec{font-size:12.5px;color:var(--muted);margin-top:2px}
.price-row{margin-top:6px;display:flex;align-items:baseline;gap:6px;flex-wrap:wrap}
.price{color:var(--discount);font-size:17px;font-weight:600}
.price.plain{color:var(--text)}
.origin{font-size:12.5px;color:var(--muted);text-decoration:line-through}
.tag{
  font-size:11px;background:#FDECEA;color:var(--discount);
  border-radius:4px;padding:1px 6px;
}
.tag.gray{background:#F1F3F5;color:var(--muted)}

.stepper{flex:none;display:flex;align-items:center;gap:10px}
.step{
  width:28px;height:28px;border-radius:50%;border:1px solid var(--line);
  background:#fff;line-height:1;cursor:pointer;font-size:18px;color:var(--brand);
}
.step:active{background:var(--brand-light)}
.qty{min-width:18px;text-align:center;font-size:15px}

/* 结算栏 */
.checkout-bar{
  position:fixed;left:0;right:0;bottom:calc(56px + env(safe-area-inset-bottom));
  background:#fff;border-top:1px solid var(--line);
  padding:10px 14px;display:flex;align-items:center;gap:12px;z-index:30;
}
.checkout-bar[hidden]{display:none}
.sum{flex:1}
.sum-line{font-size:14px}
.sum-line b{color:var(--discount);font-size:19px}
.sum-sub{font-size:12px;color:var(--ok)}

/* 底部导航 */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;background:#fff;
  border-top:1px solid var(--line);display:flex;z-index:40;
  padding-bottom:env(safe-area-inset-bottom);
}
.tab{
  flex:1;text-align:center;padding:12px 0;font-size:14px;
  color:var(--muted);text-decoration:none;
}
.tab.active{color:var(--brand);font-weight:600}

/* 表单页 */
.page{padding:12px}
.sec{background:#fff;border-radius:12px;padding:14px;margin-bottom:10px}
.sec h4{margin:0 0 10px;font-size:15px}
.field{margin-bottom:10px}
.field:last-child{margin-bottom:0}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:4px}
.row2{display:flex;gap:10px}
.row2>*{flex:1}

/* 省市区三级联动：3 个 select 横排，手机宽屏自适应 */
.area-row{display:flex;gap:8px}
.area-row select{flex:1;min-width:0;padding:9px 6px;font-size:14px}
@media (max-width:360px){.area-row{flex-wrap:wrap}.area-row select{flex:1 1 30%;min-width:80px}}

.line-item{
  display:flex;justify-content:space-between;font-size:14px;padding:5px 0;
}
.line-item .li-title{flex:1;min-width:0}
.line-item .li-qty{color:var(--muted);margin-left:8px}
.total-line{
  display:flex;justify-content:space-between;align-items:baseline;
  border-top:1px solid var(--line);margin-top:8px;padding-top:10px;
}
.total-line b{color:var(--discount);font-size:20px}

/* 订单状态 */
.status{font-size:13px;padding:2px 8px;border-radius:4px}
.s-pending{background:#FFF4E5;color:var(--warn)}
.s-paid{background:#E6F1FB;color:#17527E}
.s-shipped{background:#E7F4EC;color:var(--ok)}
.s-done{background:#F1F3F5;color:var(--muted)}
.s-refunded{background:#FDECEA;color:var(--discount)}

.order-card{background:#fff;border-radius:12px;padding:12px;margin-bottom:10px}
.oc-head{display:flex;justify-content:space-between;align-items:center;font-size:12.5px;color:var(--muted)}
.oc-goods{margin:8px 0;font-size:14px}
.oc-foot{
  display:flex;justify-content:space-between;align-items:center;
  border-top:1px solid var(--line);margin-top:8px;padding-top:8px;
}
.express{font-size:13px;color:var(--ok);margin-top:6px}
.express.self-pickup{color:var(--brand);font-weight:600;background:var(--brand-light);padding:4px 9px;border-radius:6px;display:inline-block}
.copy-btn{border:1px solid var(--brand);color:var(--brand);background:#fff;border-radius:6px;padding:3px 10px;font-size:12.5px;cursor:pointer}

.empty{text-align:center;color:var(--muted);padding:60px 20px;font-size:14px}
.toast{
  position:fixed;left:50%;bottom:120px;transform:translateX(-50%);
  background:rgba(0,0,0,.8);color:#fff;padding:10px 18px;border-radius:20px;
  font-size:14px;z-index:99;opacity:0;transition:opacity .2s;pointer-events:none;
}
.toast.show{opacity:1}

/* 支付结果 */
.result{text-align:center;padding:50px 20px}
.result .icon{
  width:64px;height:64px;border-radius:50%;background:var(--ok);color:#fff;
  font-size:34px;line-height:64px;margin:0 auto 16px;
}
.result h3{margin:0 0 6px;font-size:18px}
.result p{margin:0;color:var(--muted);font-size:14px}