/* 擇吾 XERVU — mobile first, max content width 480px */
:root{
  --blue:#1565c0;
  --blue-dark:#0d47a1;
  --orange:#f28c1e;
  --bg:#f4f6f9;
  --card:#ffffff;
  --text:#1f2937;
  --muted:#6b7280;
  --line:#e5e7eb;
  --danger:#dc2626;
  --ok:#15803d;
  --radius:14px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang TC","PingFang SC","Microsoft JhengHei","Microsoft YaHei","Noto Sans TC","Noto Sans SC",sans-serif;
  background:var(--bg);color:var(--text);
  font-size:17px;line-height:1.6;
  -webkit-text-size-adjust:100%;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue);text-decoration:none}
h1{font-size:24px;margin:18px 0 12px}
h2{font-size:20px;margin:20px 0 10px}
h3{font-size:18px;margin:16px 0 8px}
p{margin:8px 0}

/* layout */
.page{max-width:480px;margin:0 auto;padding:0 16px 120px;min-width:0}
.page-narrow{max-width:480px}

/* brand bar */
.brand-bar{
  position:sticky;top:0;z-index:50;
  background:var(--card);
  margin:0 -16px;padding:10px 16px;
  display:flex;align-items:center;gap:12px;
  border-bottom:1px solid var(--line);
}
.brand-logo{width:48px;height:48px;object-fit:contain;flex:0 0 auto;border-radius:10px}
.brand-text{min-width:0;flex:1 1 auto}
.brand-name{font-size:22px;font-weight:800;letter-spacing:.5px;line-height:1.25;white-space:nowrap}
.brand-name .en{color:var(--blue)}
.brand-sub{font-size:14px;color:var(--muted);line-height:1.4}
.brand-slogan{font-size:13px;color:var(--orange);font-weight:600;line-height:1.4}
.lang-btn{
  flex:0 0 auto;border:1px solid var(--line);background:var(--bg);
  border-radius:999px;padding:8px 14px;font-size:15px;cursor:pointer;color:var(--text);
}
/* 19 语言下拉 */
.lang-wrap{position:relative;flex:0 0 auto}
.lang-menu{
  display:none;position:absolute;right:0;top:calc(100% + 6px);z-index:100;
  background:var(--card);border:1px solid var(--line);border-radius:12px;
  max-height:60vh;overflow-y:auto;min-width:150px;
  box-shadow:0 8px 24px rgba(0,0,0,.18);
}
.lang-menu.open{display:block}
.lang-menu button{
  display:block;width:100%;text-align:left;background:none;border:0;
  padding:10px 14px;font-size:15px;color:var(--text);cursor:pointer;
}
.lang-menu button.on{font-weight:800;color:var(--blue)}
.lang-menu button:active{background:var(--line)}

/* bottom nav */
.bottom-nav{
  position:fixed;left:0;right:0;bottom:0;z-index:50;
  background:var(--card);border-top:1px solid var(--line);
  display:flex;
  padding-bottom:env(safe-area-inset-bottom);
}
.bottom-nav a{
  flex:1 1 0;display:flex;flex-direction:column;align-items:center;gap:2px;
  padding:10px 4px 8px;color:var(--muted);font-size:13px;min-width:0;
}
.bottom-nav a .ico{font-size:22px;line-height:1}
.bottom-nav a.active{color:var(--blue);font-weight:700}
.bottom-nav a.active .ico{filter:none}

/* buttons */
.btn{
  display:block;width:100%;padding:15px 16px;margin:10px 0;
  font-size:18px;font-weight:700;border:none;border-radius:12px;cursor:pointer;
  text-align:center;line-height:1.4;background:#e5e7eb;color:var(--text);
}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:active{background:var(--blue-dark)}
.btn-accent{background:var(--orange);color:#fff}
.btn-outline{background:#fff;color:var(--blue);border:2px solid var(--blue)}
.btn-danger{background:var(--danger);color:#fff}
.btn-ok{background:var(--ok);color:#fff}
.btn-row{display:flex;gap:10px;margin:10px 0}
.btn-row .btn{margin:0;flex:1 1 0;min-width:0}
.btn-sm{width:auto;display:inline-block;padding:9px 16px;font-size:15px;margin:4px 6px 4px 0}
button:disabled{opacity:.55;cursor:default}

/* hero */
.hero{background:linear-gradient(135deg,#e8f1fd 0%,#fff4e6 100%);border-radius:var(--radius);padding:22px 18px;margin:16px 0}
.hero p{color:#374151;font-size:16px}
.hero .btn{margin:12px 0 0}

/* search & filters */
.search-row{display:flex;gap:8px;margin:12px 0}
.search-row input{flex:1 1 auto;min-width:0}
.cat-row{display:flex;gap:8px;flex-wrap:wrap;margin:8px 0}
.chip{
  border:1px solid var(--line);background:#fff;border-radius:999px;
  padding:9px 16px;font-size:15px;cursor:pointer;color:var(--text);
}
.chip.active{background:var(--blue);color:#fff;border-color:var(--blue);font-weight:700}

/* forms */
.field{margin:14px 0}
.field label{display:block;font-weight:700;margin-bottom:6px;font-size:16px}
.field input[type=text],.field input[type=number],.field input[type=password],
.field select,.field textarea{
  width:100%;padding:13px 12px;font-size:17px;border:1px solid var(--line);
  border-radius:10px;background:#fff;color:var(--text);font-family:inherit;
}
.field textarea{min-height:110px;resize:vertical}
.field .hint{font-size:13px;color:var(--muted);margin-top:4px}
.img-preview{margin-top:8px;border-radius:10px;overflow:hidden;max-width:100%}
.img-preview img{width:100%;max-height:260px;object-fit:cover}

/* cards */
.card{background:var(--card);border-radius:var(--radius);padding:14px;margin:12px 0;
  box-shadow:0 1px 4px rgba(0,0,0,.06);overflow:hidden}
.res-card{display:block;color:var(--text);padding:0}
.res-card .thumb{width:100%;aspect-ratio:16/9;object-fit:cover;background:#e5e7eb}
.res-card .body{padding:12px 14px 14px}
.res-card .title{font-size:18px;font-weight:700;margin:0 0 6px;line-height:1.4;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.meta{display:flex;flex-wrap:wrap;gap:6px 12px;font-size:14px;color:var(--muted);align-items:center}
.meta .price{color:var(--orange);font-weight:800;font-size:16px}
.badge{display:inline-block;padding:2px 10px;border-radius:999px;font-size:13px;background:#eef2f7;color:#374151;white-space:nowrap}
.badge.blue{background:#e3f0fd;color:var(--blue-dark)}
.badge.orange{background:#fff3e2;color:#b45309}
.badge.green{background:#e7f6ec;color:var(--ok)}
.badge.red{background:#fdecec;color:var(--danger)}
.badge.gray{background:#f1f3f5;color:var(--muted)}

/* detail */
.detail-img{width:100%;border-radius:var(--radius);max-height:320px;object-fit:cover;background:#e5e7eb}
.kv{display:flex;gap:8px;padding:9px 0;border-bottom:1px solid var(--line);font-size:16px}
.kv:last-child{border-bottom:none}
.kv .k{flex:0 0 auto;color:var(--muted);min-width:88px}
.kv .v{flex:1 1 auto;min-width:0;word-break:break-word}
.desc{white-space:pre-wrap;word-break:break-word}

/* dashboard */
.xc-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:12px 0}
.xc-box{background:var(--card);border-radius:var(--radius);padding:14px;text-align:center;box-shadow:0 1px 4px rgba(0,0,0,.06)}
.xc-box.wide{grid-column:1/-1}
.xc-box .num{font-size:28px;font-weight:800;color:var(--blue);line-height:1.2}
.xc-box .num.orange{color:var(--orange)}
.xc-box .num.red{color:var(--danger)}
.xc-box .lbl{font-size:14px;color:var(--muted);margin-top:4px}

/* ledger */
.ledger-row{display:flex;gap:8px;align-items:flex-start;padding:10px 0;border-bottom:1px solid var(--line);font-size:15px}
.ledger-row:last-child{border-bottom:none}
.ledger-row .t{flex:0 0 auto;color:var(--muted);font-size:13px;min-width:86px}
.ledger-row .mid{flex:1 1 auto;min-width:0}
.ledger-row .amt{flex:0 0 auto;font-weight:800;font-size:16px}
.amt.plus{color:var(--ok)}
.amt.minus{color:var(--danger)}

/* tabs */
.tabs{display:flex;gap:8px;margin:14px 0}
.tab{flex:1 1 0;padding:13px 8px;text-align:center;background:#fff;border:1px solid var(--line);
  border-radius:12px;font-size:16px;font-weight:700;cursor:pointer;color:var(--muted);min-width:0}
.tab.active{background:var(--blue);border-color:var(--blue);color:#fff}

/* order card */
.order-card .actions{margin-top:10px}
.confirm-line{font-size:14px;color:var(--muted);margin-top:6px}

/* tables (admin) */
.table-wrap{overflow-x:auto;margin:10px 0;background:#fff;border-radius:12px}
table{width:100%;border-collapse:collapse;font-size:14px;min-width:420px}
th,td{text-align:left;padding:10px 8px;border-bottom:1px solid var(--line);vertical-align:top;word-break:break-word}
th{background:#f8fafc;font-weight:700;white-space:nowrap}
tr:last-child td{border-bottom:none}
.mono{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:13px;word-break:break-all}

.section{background:var(--card);border-radius:var(--radius);padding:16px;margin:16px 0;box-shadow:0 1px 4px rgba(0,0,0,.06)}
.section h2{margin-top:0}
.empty{color:var(--muted);text-align:center;padding:28px 16px;font-size:16px}
.center{text-align:center}
.muted{color:var(--muted);font-size:14px}
.footer{margin:28px 0 8px;text-align:center;font-size:14px;color:var(--muted)}
.hidden{display:none!important}
.notice{background:#fff8e8;border:1px solid #f5d48a;border-radius:12px;padding:12px 14px;margin:12px 0;font-size:15px}
.locked{background:#fff;border-radius:var(--radius);padding:40px 20px;text-align:center;margin:24px 0}
.locked .big{font-size:52px}

/* XC 锚定美元说明 — 首页醒目横幅 */
.xc-peg{
  display:block;
  margin:14px 0 6px;
  padding:14px 16px;
  font-size:21px;
  text-align:center;
  color:#8a5200;
  background:#fff7e8;
  border:2px solid var(--orange);
  border-radius:12px;
}
.xc-peg b{font-weight:800;letter-spacing:1px;}
.usd-approx{color:var(--orange);font-weight:700;font-size:15px;min-height:1.2em;}

/* 奖励机制区块 */
.rewards-section{margin:18px 0;padding:18px;background:linear-gradient(135deg,#fff8e6 0%,#fff 100%);border-radius:var(--radius);border:2px solid #f5b942;}
.rewards-section h2{margin:0 0 4px;color:#92400e;}
.rewards-sub{color:#92400e;font-size:14px;margin:0 0 12px;}
.rewards-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;}
.reward-card{background:#fff;border:1px solid #f5d78e;border-radius:10px;padding:12px;text-align:center;}
.reward-card .r-amt{font-size:26px;font-weight:800;color:#d97706;}
.reward-card .r-unit{font-size:13px;color:#92400e;font-weight:700;}
.reward-card .r-name{font-size:14px;font-weight:700;margin-top:4px;}
.reward-card .r-desc{font-size:12px;color:#78716c;margin-top:2px;line-height:1.5;}
@media(min-width:640px){.rewards-grid{grid-template-columns:1fr 1fr 1fr 1fr;}}

/* 公告区块 */
.announce-section{margin:18px 0;padding:0;}
.announce-card{background:#eff6ff;border:1px solid #bfdbfe;border-radius:var(--radius);padding:14px 16px;margin-bottom:10px;}
.announce-card .a-date{font-size:12px;color:#6b7280;}
.announce-card .a-title{font-weight:800;font-size:16px;margin:2px 0 4px;}
.announce-card .a-body{font-size:14px;color:#374151;line-height:1.6;}

/* 分享区块 */
.share-section{margin:18px 0;padding:18px;background:var(--card);border-radius:var(--radius);border:1px solid var(--line);}
.share-section h2{margin:0 0 6px;}
.share-row{display:flex;gap:16px;align-items:center;margin-top:12px;}
.share-qr{width:120px;height:120px;border-radius:10px;cursor:pointer;flex-shrink:0;}
.share-btns{display:flex;flex-direction:column;gap:10px;flex:1;}
.qr-modal{position:fixed;inset:0;background:rgba(0,0,0,.75);display:flex;align-items:center;justify-content:center;z-index:100;padding:24px;}
.qr-modal.hidden{display:none;}
.qr-modal img{width:min(80vw,340px);height:auto;border-radius:12px;background:#fff;padding:12px;}

/* 邀请区 */
.invite-section{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;}
.invite-head{display:flex;align-items:center;justify-content:space-between;gap:12px;}
.invite-head h2{margin:0;}
.invite-code-row{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:10px;}
.invite-code{font-size:32px;font-weight:800;letter-spacing:6px;color:var(--blue);font-variant-numeric:tabular-nums;}
.small{font-size:13px;}

/* PWA 加到桌面引導（底部浮窗） */
#pwa-banner{position:fixed;left:12px;right:12px;bottom:76px;z-index:900;
  background:#fff;color:var(--text);border:1px solid var(--line);border-radius:12px;
  padding:13px 14px;display:flex;align-items:center;gap:12px;
  box-shadow:0 12px 32px rgba(15,23,42,.22);font-size:14px;font-weight:600;}
#pwa-banner .pwa-msg{flex:1;line-height:1.5;}
#pwa-banner .pwa-go{background:#1565c0;color:#fff;border:0;border-radius:8px;
  padding:10px 16px;font-size:14px;font-weight:700;white-space:nowrap;flex:none;}
#pwa-banner .pwa-x{font-size:22px;line-height:1;color:var(--muted);padding:4px 6px;flex:none;cursor:pointer;}
/* Facebook / Messenger 内置浏览器引导横幅（顶部通栏，可关闭） */
#fb-banner{background:#1565c0;color:#fff;padding:11px 14px;display:flex;align-items:center;gap:10px;
  font-size:13.5px;font-weight:600;line-height:1.5;}
#fb-banner .fb-msg{flex:1;}
#fb-banner .fb-x{font-size:20px;line-height:1;padding:4px 6px;flex:none;cursor:pointer;opacity:.85;}
@media(max-width:640px){#pwa-banner{left:10px;right:10px;bottom:72px;font-size:13.5px;}}
.pwa-ov{position:fixed;inset:0;z-index:1000;background:rgba(0,0,0,.5);display:flex;align-items:center;justify-content:center;padding:20px;}
.pwa-card{background:#fff;border-radius:12px;padding:20px;max-width:340px;width:100%;}
.pwa-card-title{font-size:17px;font-weight:700;margin-bottom:12px;}
.pwa-steps{margin:0 0 16px 22px;padding:0;font-size:15px;line-height:1.7;}
.pwa-steps li{margin-bottom:6px;}
.pwa-ico{display:inline-block;width:24px;height:24px;vertical-align:-6px;margin:0 2px;}
.pwa-card .pwa-close{width:100%;}

/* 訂單站內信 */
.msg-thread{margin-top:10px;border-top:1px solid var(--line);padding-top:10px;}
.msg-thread-title{font-size:14px;font-weight:700;color:var(--muted);margin-bottom:8px;}
.msg-list{max-height:300px;overflow-y:auto;margin-bottom:10px;}
.msg{margin:0 0 8px;max-width:88%;}
.msg .msg-name{font-size:12px;color:var(--muted);margin-bottom:2px;}
.msg .msg-body{background:#eef2f7;border-radius:10px;padding:8px 12px;font-size:15px;white-space:pre-wrap;word-break:break-word;}
.msg.mine{margin-left:auto;text-align:right;}
.msg.mine .msg-body{background:#dceaff;}
.msg-input-row{display:flex;gap:8px;}
.msg-input-row input{flex:1;border:1px solid var(--line);border-radius:10px;padding:10px 12px;font-size:15px;}
.msg-input-row .btn{flex:none;}

/* 发布页城市一键定位 */
.city-row{display:flex;gap:8px;align-items:center}
.city-row input{flex:1;min-width:0}
.btn-locate{flex:none;white-space:nowrap;padding:10px 14px}
.btn-locate:disabled{opacity:.6}

/* 发布页供需切换 */
.kind-toggle{display:flex;gap:10px;margin:2px 0 14px}
.kind-btn{flex:1;padding:14px 8px;font-size:16px;font-weight:700;border:2px solid #cfd8dc;border-radius:12px;background:#fff;cursor:pointer;color:#546e7a}
.kind-btn.active{border-color:var(--blue);background:#e8f1fb;color:var(--blue-dark)}
.kind-btn[data-kind="need"].active{border-color:var(--orange);background:#fef3e2;color:#b25c00}
/* 需求徽标 */
.badge.need{background:#f28c1e;color:#fff}
.badge.qty{background:#eceff1;color:#455a64}

/* 注册头像选择 */
.avatar-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:4px 0 10px}
.avatar-opt{border:2px solid transparent;border-radius:50%;cursor:pointer;padding:2px}
.avatar-opt.sel{border-color:#ff7a1a}
.avatar-opt img{width:100%;aspect-ratio:1;border-radius:50%;object-fit:cover;display:block;background:#f2f2f2}
.avatar-upload-row{margin-bottom:4px}
.btn-small{padding:8px 14px;font-size:14px}
/* 通用头像 */
.uavatar{width:28px;height:28px;border-radius:50%;object-fit:cover;flex:none;background:#eee}
.seller-line{display:flex;align-items:center;gap:8px}

/* 附近搜：位置栏 + 底部弹窗 */
.loc-bar{display:flex;justify-content:space-between;align-items:center;width:100%;margin:8px 0;padding:10px 12px;background:#f5f7fa;border:1px solid #e3e6ea;border-radius:10px;font-size:15px;cursor:pointer;color:#333}
.sheet{position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:60;display:flex;align-items:flex-end}
.sheet-inner{width:100%;background:#fff;border-radius:16px 16px 0 0;padding:18px 16px 24px;max-height:80vh;overflow:auto}
.sheet-inner h3{margin:0 0 12px;font-size:17px}
.btn-block{width:100%}
.radius-row{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
#loc-city{width:100%;box-sizing:border-box}

/* 地图模式 */
.view-toggle{display:flex;gap:8px;margin:10px 0}
#map{height:62vh;min-height:420px;border-radius:12px;z-index:0}
.prod-pin{background:none;border:none}
.pin-thumb{width:46px;height:46px;border-radius:50%;overflow:hidden;border:3px solid #fff;box-shadow:0 2px 8px rgba(0,0,0,.35);background:#fff}
.pin-thumb img{width:100%;height:100%;object-fit:cover;display:block}
.pin-noimg{width:100%;height:100%;display:flex;align-items:center;justify-content:center;font-size:22px}
.map-popup{display:block;text-decoration:none;color:inherit;min-width:150px}
.map-popup img{width:100%;height:96px;object-fit:cover;border-radius:8px;display:block}
.map-popup .mp-t{font-weight:700;margin:6px 0 2px;font-size:14px}
.map-popup .mp-p{color:var(--orange,#e8710a);font-weight:800;font-size:14px}
.map-popup .mp-dist{color:#666;font-weight:400}

/* 介紹頁 about.html */
.about-hero{text-align:center;padding:28px 16px 12px}
.about-logo{width:96px;height:96px;border-radius:24px;box-shadow:0 4px 14px rgba(0,0,0,.15)}
.about-hero h1{margin:12px 0 4px;font-size:28px}
.about-hero-sub{color:#555;font-size:16px;margin:0}
.about-steps{display:flex;flex-direction:column;gap:12px}
.about-step{display:flex;gap:12px;align-items:flex-start;background:#f7f9fc;border-radius:12px;padding:12px}
.about-step-n{flex:0 0 32px;width:32px;height:32px;border-radius:50%;background:#1565c0;color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800}
.section.promise{background:linear-gradient(135deg,#fff8e1,#ffffff);border:2px solid #ffb300;border-radius:14px;padding:16px}
.promise-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:10px}
.promise-card{background:#fff;border-radius:10px;padding:10px;border:1px solid #ffe0b2}
.promise-card b{display:block;color:#e65100;margin-bottom:4px;font-size:15px}
.promise-card span{font-size:13px;color:#555}
.about-rw{display:flex;gap:12px;align-items:center;padding:10px 0;border-bottom:1px solid #eee}
.about-rw-amt{font-size:20px;font-weight:800;color:#1565c0;white-space:nowrap;min-width:88px}
.about-rw-amt span{font-size:13px;font-weight:400}
.about-rw-name{font-weight:700}
.about-rw-desc{font-size:13px;color:#666}
.faq{border:1px solid #e0e0e0;border-radius:10px;margin-bottom:8px;padding:10px 12px;background:#fff}
.faq summary{font-weight:700;cursor:pointer}
.faq .desc{margin-top:8px}
.about-cta{display:flex;flex-direction:column;gap:10px;margin:24px 0 40px}
.footer-sep{color:#999;margin:0 6px}