:root{
  --bg:#f5f6fa; --card:#fff; --ink:#1c2233; --sub:#6b7385; --line:#e9ecf3;
  --brand:#3a5bff; --brand-d:#2743d6; --ok:#12b886; --warn:#f08c00; --danger:#e03131;
  --gold:#f59f00; --shadow:0 2px 14px rgba(28,34,51,.06);
  --radius:16px;
}
*{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(--ink);font-size:15px;line-height:1.55}
a{color:var(--brand);text-decoration:none}
img{max-width:100%}
.wrap{max-width:900px;margin:0 auto;padding:0 14px}

/* 顶部栏 */
.topbar{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line)}
.topbar .wrap{display:flex;align-items:center;gap:10px;height:56px}
.brand{font-weight:800;font-size:18px;letter-spacing:.5px;display:flex;align-items:center;gap:7px}
.brand .logo{width:28px;height:28px;border-radius:8px;background:linear-gradient(135deg,var(--brand),#7a4bff);
  display:grid;place-items:center;color:#fff;font-size:16px}
.spacer{flex:1}
.who{font-size:13px;color:var(--sub)}
.who b{color:var(--ink)}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:none;cursor:pointer;
  background:var(--brand);color:#fff;padding:10px 16px;border-radius:12px;font-size:14px;font-weight:600;
  transition:.15s;font-family:inherit}
.btn:active{transform:scale(.97)}
.btn.ghost{background:#eef1fb;color:var(--brand)}
.btn.line{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn.sm{padding:7px 12px;font-size:13px;border-radius:10px}
.btn.block{width:100%}
.btn.ok{background:var(--ok)}
.btn:disabled{opacity:.5}

/* 卡片 */
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:16px;margin-bottom:14px}
.card h3{margin:0 0 4px}
.muted{color:var(--sub)}
.small{font-size:13px}
.tiny{font-size:12px}

/* 表单 */
.field{margin-bottom:12px}
.field label{display:block;font-size:13px;color:var(--sub);margin-bottom:5px;font-weight:600}
.field input,.field select,.field textarea{width:100%;padding:11px 12px;border:1px solid var(--line);
  border-radius:12px;font-size:15px;font-family:inherit;background:#fbfbfe;color:var(--ink)}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--brand);background:#fff}
.row{display:flex;gap:10px}
.row>*{flex:1}

/* 标签/徽章 */
.tag{display:inline-block;padding:2px 9px;border-radius:20px;font-size:12px;font-weight:600}
.tag.blue{background:#e7ecff;color:var(--brand)}
.tag.green{background:#e2f8ef;color:var(--ok)}
.tag.orange{background:#fff2e0;color:var(--warn)}
.tag.gray{background:#eef0f5;color:var(--sub)}
.tag.gold{background:#fff6df;color:var(--gold)}

/* 网格 */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.pcard{background:var(--card);border-radius:14px;box-shadow:var(--shadow);overflow:hidden;display:flex;flex-direction:column}
.pcard .thumb{height:96px;display:grid;place-items:center;font-size:44px;background:linear-gradient(135deg,#eef1fb,#f7f0ff)}
.pcard .body{padding:11px}
.pcard .body .t{font-weight:700;font-size:14px;line-height:1.3;min-height:36px}
.price{color:var(--danger);font-weight:800}
.price .cur{font-size:12px}
.strike{color:var(--sub);text-decoration:line-through;font-size:12px}

/* 列表行 */
.orow{display:flex;gap:12px;padding:13px 0;border-bottom:1px solid var(--line)}
.orow:last-child{border-bottom:none}
.orow .emj{font-size:30px;width:46px;height:46px;display:grid;place-items:center;background:#f4f5fb;border-radius:12px;flex:none}
.orow .info{flex:1;min-width:0}
.kv{display:flex;justify-content:space-between;gap:10px;font-size:13px;padding:2px 0}
.kv .k{color:var(--sub)}

/* 底部 tab */
.tabbar{position:sticky;bottom:0;z-index:20;background:rgba(255,255,255,.95);backdrop-filter:blur(10px);
  border-top:1px solid var(--line);display:flex}
.tabbar a{flex:1;text-align:center;padding:9px 0 12px;color:var(--sub);font-size:11px;font-weight:600}
.tabbar a .ic{display:block;font-size:20px;line-height:1.4}
.tabbar a.on{color:var(--brand)}

/* landing */
.hero{background:linear-gradient(150deg,#3a5bff,#7a4bff);color:#fff;border-radius:20px;padding:26px 20px;margin:16px 0}
.hero h1{margin:0 0 8px;font-size:26px;line-height:1.25}
.hero p{margin:0;opacity:.92}
.flow{display:flex;align-items:stretch;gap:8px;margin:16px 0;flex-wrap:wrap}
.flow .step{flex:1;min-width:120px;background:var(--card);border-radius:14px;padding:14px;box-shadow:var(--shadow)}
.flow .step .n{font-size:22px}
.flow .step b{display:block;margin:4px 0 2px}
.arrow{align-self:center;color:var(--sub);font-size:20px}
.feat{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:14px 0}
.feat .f{background:var(--card);border-radius:14px;padding:14px;box-shadow:var(--shadow)}
.feat .f .i{font-size:22px}

.toast{position:fixed;left:50%;top:20px;transform:translateX(-50%);background:#1c2233;color:#fff;
  padding:11px 18px;border-radius:12px;font-size:14px;z-index:100;box-shadow:0 6px 24px rgba(0,0,0,.2);
  opacity:0;transition:.25s;pointer-events:none;max-width:90%}
.toast.show{opacity:1;top:30px}

.tabs{display:flex;gap:6px;background:#eef0f5;padding:4px;border-radius:12px;margin-bottom:14px}
.tabs button{flex:1;border:none;background:transparent;padding:9px;border-radius:9px;font-weight:600;
  color:var(--sub);cursor:pointer;font-family:inherit;font-size:14px}
.tabs button.on{background:#fff;color:var(--ink);box-shadow:var(--shadow)}

.empty{text-align:center;color:var(--sub);padding:40px 10px}
.empty .e{font-size:40px}

.banner{background:#fff8e6;border:1px solid #ffe9b0;border-radius:12px;padding:10px 12px;font-size:13px;
  color:#7a5c00;margin-bottom:12px;display:flex;gap:8px}
.mask{background:#fff4f4;border:1px dashed #ffc9c9;border-radius:10px;padding:8px 10px;font-size:12px;color:#c92a2a;margin-top:6px}
.modal-bg{position:fixed;inset:0;background:rgba(20,24,40,.45);z-index:50;display:grid;place-items:center;padding:16px}
.modal{background:#fff;border-radius:18px;padding:20px;width:100%;max-width:420px;max-height:90vh;overflow:auto}
.demo-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.chip{background:#eef1fb;border:1px solid var(--line);border-radius:10px;padding:8px 10px;font-size:13px;cursor:pointer;flex:1;text-align:center;min-width:90px}
.chip b{display:block}
.center{text-align:center}
hr.sep{border:none;border-top:1px solid var(--line);margin:14px 0}