: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}

/* ============================================================
   2026-09-09 新增：顶部按钮 / 客服悬浮 / 订单操作区 / 评价留言
   ============================================================ */

/* 顶部右上角小按钮：回首页 + 退出 */
.topbar{display:flex;align-items:flex-start;gap:8px}
.topbar .brand{flex:none}
.topbar .identity{flex:1;min-width:0;margin-top:6px}
.top-btn{
  flex:none;margin-top:2px;background:rgba(255,255,255,.18);color:#fff;
  border:none;border-radius:14px;padding:3px 11px;font-size:12.5px;cursor:pointer;
}
.top-btn[hidden]{display:none}
.top-btn:active{background:rgba(255,255,255,.32)}

/* 客服悬浮按钮：右下角，避开底部 tabbar 和结算栏 */
.fab-service{
  position:fixed;right:14px;bottom:calc(78px + env(safe-area-inset-bottom));
  width:48px;height:48px;border-radius:50%;
  background:var(--brand);color:#fff;text-decoration:none;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 14px rgba(23,82,126,.35);z-index:30;
}
.fab-service[hidden]{display:none}
.fab-service:active{transform:scale(.94)}
.fab-ico{font-size:17px;font-weight:600;letter-spacing:1px}

/* 订单卡片：操作按钮组 */
.oc-acts{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.oc-acts .btn{padding:6px 14px;font-size:13px;border-radius:16px;min-height:0}
.oc-acts .btn.danger{background:#FDECEA;border-color:#F5C6C2;color:var(--discount)}

/* 物流信息块：比原来一行字更显眼 */
.ship-box{
  background:var(--brand-light);border-radius:8px;padding:8px 10px;margin-top:8px;
  font-size:13px;line-height:1.7;
}
.ship-box .sb-row{display:flex;justify-content:space-between;gap:8px;align-items:center}
.ship-box .sb-label{color:var(--muted);flex:none}
.ship-box .sb-val{flex:1;text-align:right;word-break:break-all}
.ship-box.self-pickup{background:#FFF4E5;color:var(--warn);font-weight:600}

/* 申请取消 / 已退款 的醒目提示条 */
.oc-tip{
  margin-top:8px;padding:6px 10px;border-radius:6px;font-size:12.5px;
  background:#FFF4E5;color:var(--warn);
}
.oc-tip.done{background:#F1F3F5;color:var(--muted)}

/* 已评价摘要 */
.review-box{
  margin-top:8px;padding:8px 10px;border-radius:8px;background:#FAFBFC;
  border:1px solid var(--line);font-size:13px;
}
.review-box .stars{color:#F0A020;letter-spacing:2px}
.review-box .rv-txt{margin-top:4px;color:var(--text);white-space:pre-wrap;word-break:break-word}
.review-box .rv-imgs{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}
.review-box .rv-imgs img{
  width:64px;height:64px;object-fit:cover;border-radius:6px;cursor:pointer;
}

/* 通用弹层里的内容 */
.rate-row{display:flex;gap:6px;margin:6px 0 12px}
.rate-row .star{font-size:28px;color:#DDD;cursor:pointer;line-height:1}
.rate-row .star.on{color:#F0A020}

textarea.sheet-ta{
  width:100%;min-height:88px;border:1px solid var(--line);border-radius:8px;
  padding:9px 10px;font-size:14px;resize:vertical;outline:none;
}
textarea.sheet-ta:focus{border-color:var(--brand)}
.sheet input.sheet-in{
  width:100%;border:1px solid var(--line);border-radius:8px;
  padding:9px 10px;font-size:14px;margin-bottom:9px;outline:none;
}
.sheet input.sheet-in:focus{border-color:var(--brand)}

/* 图片上传九宫格 */
.up-grid{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0 4px}
.up-grid .up-item{position:relative;width:72px;height:72px}
.up-grid .up-item img{width:72px;height:72px;object-fit:cover;border-radius:6px}
.up-grid .up-del{
  position:absolute;top:-6px;right:-6px;width:20px;height:20px;border-radius:50%;
  background:rgba(0,0,0,.6);color:#fff;border:none;font-size:13px;line-height:18px;
  padding:0;cursor:pointer;
}
.up-grid .up-add{
  width:72px;height:72px;border:1px dashed var(--line);border-radius:6px;
  display:flex;align-items:center;justify-content:center;color:var(--muted);
  font-size:24px;cursor:pointer;background:#FAFBFC;
}
.up-hint{font-size:12px;color:var(--muted)}

.msg-list{max-height:280px;overflow-y:auto;margin:8px 0;border-top:1px solid var(--line);padding-top:8px}
.msg-item{margin:3px 0;padding:2px 11px;border-radius:6px;font-size:13px;line-height:1.15;word-break:break-word;white-space:pre-wrap}
.msg-item.buyer{background:#F1F3F5}
.msg-item.seller{background:#E6F1FB;border:1px solid #C9DEEE}
.msg-meta{font-size:10px;color:var(--muted);margin-top:1px;line-height:1.1}
.msg-item .msg-imgs{display:flex;flex-wrap:wrap;gap:4px;margin-top:2px}
.msg-item .msg-imgs img{width:50px;height:50px;object-fit:cover;border-radius:4px;cursor:pointer}

/* 图片大图预览 */
.img-viewer{
  position:fixed;inset:0;background:rgba(0,0,0,.9);z-index:99;
  display:flex;align-items:center;justify-content:center;
}
.img-viewer img{max-width:100%;max-height:100%}