:root{
  --primary:#2f6bff;
  --primary-dark:#1f56e0;
  --bg:#f5f6f8;
  --card:#ffffff;
  --text:#1f2329;
  --text2:#7a8089;
  --border:#eef0f3;
  --danger:#e5484d;
  --success:#16a34a;
  --warn:#d97706;
  --radius:12px;
}
*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent;}
html,body{height:100%;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--text);font-size:15px;line-height:1.5;
}
a{color:inherit;text-decoration:none;}
img{display:block;}

/* 通用容器 */
.page{max-width:520px;margin:0 auto;min-height:100vh;background:var(--bg);padding-bottom:70px;}
.app-header{
  position:sticky;top:0;z-index:50;background:var(--primary);color:#fff;
  padding:14px 16px;display:flex;align-items:center;gap:12px;
}
.app-header h1{font-size:17px;font-weight:600;flex:1;}
.app-header .back{font-size:16px;cursor:pointer;padding:2px 6px;}
.card{background:var(--card);border-radius:var(--radius);padding:14px;margin:12px;box-shadow:0 1px 3px rgba(0,0,0,.03);}
.mt-12{margin-top:12px;}
.muted{color:var(--text2);font-size:13px;}
.flex{display:flex;align-items:center;}
.between{justify-content:space-between;}
.center{justify-content:center;}
.col{flex-direction:column;}
.grow{flex:1;}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  border:none;border-radius:10px;padding:11px 20px;font-size:15px;cursor:pointer;
  background:#eef0f3;color:var(--text);transition:opacity .15s;
}
.btn:active{opacity:.75;}
.btn-primary{background:var(--primary);color:#fff;}
.btn-danger{background:var(--danger);color:#fff;}
.btn-success{background:var(--success);color:#fff;}
.btn-ghost{background:transparent;border:1px solid var(--border);}
.btn-block{width:100%;}
.btn-sm{padding:6px 12px;font-size:13px;border-radius:8px;}
.btn-lg{padding:14px;font-size:16px;}

/* 表单 */
.field{margin-bottom:14px;}
.field label{display:block;font-size:13px;color:var(--text2);margin-bottom:6px;}
.input,select.input,textarea.input{
  width:100%;padding:12px;border:1px solid var(--border);border-radius:10px;
  font-size:15px;background:#fff;outline:none;
}
.input:focus{border-color:var(--primary);}
textarea.input{resize:vertical;min-height:80px;}

/* 轮播 */
.swiper{position:relative;margin:12px;border-radius:var(--radius);overflow:hidden;}
.swiper-track{display:flex;transition:transform .35s;}
.swiper-slide{flex:0 0 100%;position:relative;}
.swiper-slide img{width:100%;height:150px;object-fit:cover;}
.swiper-dots{position:absolute;bottom:8px;left:0;right:0;display:flex;justify-content:center;gap:6px;}
.swiper-dots i{width:6px;height:6px;border-radius:50%;background:rgba(255,255,255,.5);}
.swiper-dots i.on{background:#fff;width:14px;border-radius:3px;}

/* 分类宫格 */
.grid-5{display:grid;grid-template-columns:repeat(5,1fr);gap:6px;}
.grid-item{text-align:center;padding:8px 2px;cursor:pointer;}
.grid-item .ico{
  width:44px;height:44px;margin:0 auto 6px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  font-size:20px;color:var(--primary);background:#eaf1ff;
}
.grid-item .name{font-size:12px;color:var(--text);}

/* 商品网格 */
.product-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;padding:0 12px 12px;}
.product-card{background:var(--card);border-radius:var(--radius);overflow:hidden;cursor:pointer;box-shadow:0 1px 3px rgba(0,0,0,.04);}
.product-card img{width:100%;height:130px;object-fit:cover;}
.product-card .info{padding:10px;}
.product-card .name{font-size:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:40px;}
.product-card .price{color:var(--danger);font-weight:700;margin-top:6px;font-size:16px;}
.product-card .price small{font-size:12px;font-weight:400;color:var(--text2);}

.section-title{font-size:16px;font-weight:600;padding:14px 12px 8px;}

/* 底部三Tab */
.tabbar{
  position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:520px;
  background:#fff;border-top:1px solid var(--border);display:flex;z-index:60;padding-bottom:env(safe-area-inset-bottom);
}
.tabbar a{flex:1;text-align:center;padding:8px 0 6px;color:var(--text2);font-size:11px;}
.tabbar a .ti{font-size:21px;line-height:1;display:block;margin-bottom:2px;}
.tabbar a.on{color:var(--primary);font-weight:600;}

/* 分类树联动 */
.cat-page{display:flex;height:calc(100vh - 56px);}
.cat-left{width:92px;background:#f0f1f4;overflow-y:auto;flex-shrink:0;}
.cat-left .it{padding:15px 8px;text-align:center;font-size:13px;color:var(--text2);border-left:3px solid transparent;}
.cat-left .it.on{background:#fff;color:var(--primary);font-weight:600;border-left-color:var(--primary);}
.cat-right{flex:1;overflow-y:auto;padding:10px;}
.cat-right h4{font-size:13px;color:var(--text2);padding:4px 0 8px;}

/* 列表项 */
.list-item{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--border);}
.list-item:last-child{border-bottom:none;}
.list-item .thumb{width:64px;height:64px;border-radius:10px;object-fit:cover;flex-shrink:0;background:#f5f6f8;}

/* 状态标签 */
.tag{display:inline-block;padding:2px 9px;border-radius:20px;font-size:12px;}
.tag-0{background:#fff3e0;color:var(--warn);}
.tag-1{background:#e8f5e9;color:var(--success);}
.tag-2{background:#fdecea;color:var(--danger);}
.tag-3{background:#e3f2fd;color:var(--primary);}
.tag-4{background:#e8eaf6;color:#3949ab;}
.tag-5{background:#f0f0f0;color:#9e9e9e;}

/* 流水 */
.tx-row{display:flex;align-items:center;padding:12px 0;border-bottom:1px solid var(--border);}
.tx-row:last-child{border-bottom:none;}
.tx-amount{font-weight:700;font-size:15px;}
.tx-in{color:var(--success);}
.tx-out{color:var(--danger);}

/* 对话气泡 */
.chat-box{padding:12px;display:flex;flex-direction:column;gap:12px;min-height:60vh;}
.chat-msg{display:flex;flex-direction:column;max-width:80%;}
.chat-msg.user{align-self:flex-end;align-items:flex-end;}
.chat-msg.admin{align-self:flex-start;align-items:flex-start;}
.bubble{padding:10px 13px;border-radius:14px;font-size:14px;word-break:break-word;white-space:pre-wrap;}
.chat-msg.user .bubble{background:var(--primary);color:#fff;border-bottom-right-radius:4px;}
.chat-msg.admin .bubble{background:#fff;border:1px solid var(--border);border-bottom-left-radius:4px;}
.chat-meta{font-size:11px;color:#b0b6bf;margin-top:4px;}
.chat-input{position:sticky;bottom:0;display:flex;gap:8px;padding:10px;background:#fff;border-top:1px solid var(--border);max-width:520px;margin:0 auto;}

/* 个人中心 */
.user-top{background:var(--primary);color:#fff;padding:24px 16px 18px;}
.user-top .avatar{width:54px;height:54px;border-radius:50%;background:rgba(255,255,255,.25);display:flex;align-items:center;justify-content:center;font-size:24px;margin-right:12px;}
.menu-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;}
.menu-item{text-align:center;padding:16px 0;cursor:pointer;}
.menu-item .mi{font-size:22px;display:block;margin-bottom:6px;}

/* 空态 */
.empty{text-align:center;color:#b0b6bf;padding:50px 20px;}
.empty .e{font-size:40px;margin-bottom:10px;}

/* 图片上传 */
.upload-box{display:flex;gap:10px;flex-wrap:wrap;}
.upload-slot{width:110px;height:72px;border:2px dashed var(--border);border-radius:10px;display:flex;align-items:center;justify-content:center;color:#b0b6bf;font-size:22px;cursor:pointer;overflow:hidden;position:relative;background:#fafbfc;}
.upload-slot img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0;}

/* 弹层 */
.mask{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:100;display:none;align-items:flex-end;justify-content:center;}
.mask.show{display:flex;}
.sheet{background:#fff;width:100%;max-width:520px;border-radius:16px 16px 0 0;padding:16px;max-height:80vh;overflow-y:auto;}
.sheet h3{font-size:16px;margin-bottom:12px;}

/* 单商品页 */
.prod-hero img{width:100%;height:300px;object-fit:cover;}
.prod-price{color:var(--danger);font-size:24px;font-weight:700;}
.buybar{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:520px;display:flex;gap:10px;padding:10px 12px;background:#fff;border-top:1px solid var(--border);z-index:60;}

/* 徽标/计数 */
.badge{background:var(--danger);color:#fff;font-size:10px;border-radius:10px;padding:0 5px;min-width:16px;text-align:center;}
.qty{display:inline-flex;align-items:center;gap:10px;border:1px solid var(--border);border-radius:8px;padding:4px 6px;}
.qty button{width:28px;height:28px;border:none;background:#f0f1f4;border-radius:6px;font-size:16px;cursor:pointer;}