:root{
  --bg:#07080A; --panel:#12151A; --panel-soft:#0A0C0F; --panel2:#161208;
  --ink:#EDEAE4; --muted:#949AA3; --dim:#6E747D;
  --gold:#C8A45C; --gold2:#E3C98F;
  --line:rgba(237,234,228,.10); --edge:rgba(237,234,228,.085);
  --red:#B3342A; --ice:#8FC3D2; --ok:#4E9A6B;
  --safe: env(safe-area-inset-bottom, 0px);
}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html,body{background:var(--bg);color:var(--ink)}
body{
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  -webkit-font-smoothing:antialiased;
  padding:24px 18px calc(132px + var(--safe));
  max-width:640px;margin:0 auto;
  background-image:radial-gradient(700px 420px at 50% -160px,rgba(200,164,92,.12),rgba(200,164,92,0) 70%);
}
h1{font-size:34px;line-height:1.2;font-weight:300;letter-spacing:.03em;text-align:center;margin-top:0}
h2{font-size:19px;font-weight:500;letter-spacing:.14em;margin:38px 0 14px;display:flex;align-items:center;gap:10px}
h2::before{content:"";width:5px;height:5px;background:var(--gold);display:inline-block}
.sub{color:var(--muted);font-size:15px;text-align:center;margin-top:14px;line-height:1.7}
.card{background:var(--panel-soft);border:1px solid var(--edge);padding:18px;margin-bottom:14px}
.card.main{background:var(--panel)}
.card.hot{background:var(--panel2);border-color:rgba(200,164,92,.38)}

/* 顶部锚点 */
.brandbar{display:flex;justify-content:space-between;align-items:baseline;
  padding-bottom:14px;border-bottom:1px solid rgba(200,164,92,.35);margin-bottom:30px}
.brandbar .b1{font-size:16px;letter-spacing:.24em;color:var(--ink)}
.brandbar .b2{font-size:11px;letter-spacing:.14em;color:var(--dim)}
.muted{color:var(--dim);font-size:13px;line-height:1.7}
.gold{color:var(--gold2)}

.tiers{display:grid;grid-template-columns:1fr 1.16fr 1fr;gap:8px;padding:10px 0 16px}
.tier{position:relative;overflow:hidden;border:1px solid var(--edge);background:var(--panel);
  padding:14px 8px;cursor:pointer;text-align:center;touch-action:manipulation;
  transition:transform .16s cubic-bezier(.2,.8,.2,1),border-color .2s ease,background-color .2s ease}
.tier .n{font-size:11px;color:var(--dim);letter-spacing:.08em;white-space:nowrap}
.tier .p{font-size:26px;font-weight:300;margin:6px 0;font-variant-numeric:tabular-nums;transition:color .2s ease}
.tier .d{font-size:11px;color:var(--dim);line-height:1.7}
.tier:active{transform:scale(.96)}
.tier.on{border-color:var(--gold);background:rgba(200,164,92,.07)}
.tier.on .p{color:var(--gold2)}
.tier.rec{background:#171A20;border-color:rgba(237,234,228,.14);padding-top:16px;padding-bottom:16px}
.tier.rec .n::after{content:"推荐";display:block;color:var(--gold);font-size:10px;margin-top:2px}
.tier.rec .p{font-size:29px}
/* 中间那张被选中时，必须盖回金色（优先级要高于 .tier.rec） */
.tier.rec.on{border-color:var(--gold);background:rgba(200,164,92,.10)}
.tier.dim{opacity:.3}

/* 点击水波 */
.rp{position:absolute;border-radius:50%;background:rgba(200,164,92,.30);
  transform:scale(0);opacity:1;pointer-events:none;animation:rp .55s cubic-bezier(.2,.8,.2,1) forwards}
@keyframes rp{to{transform:scale(1);opacity:0}}

@media (prefers-reduced-motion: reduce){
  .tier{transition:none}
  .rp{animation-duration:.01s}
}
.tier:active{transform:scale(.96)}
.tier.rec:active{transform:scale(.96)}

.opts{display:grid;gap:8px}
.opt{display:flex;justify-content:space-between;align-items:center;border:1px solid var(--edge);background:var(--panel);padding:14px 16px;cursor:pointer;touch-action:manipulation;
  transition:transform .16s cubic-bezier(.2,.8,.2,1),border-color .2s,background-color .2s}
.opt:active{transform:scale(.975)}
.opt .t{font-size:15px}
.opt .s{font-size:12px;color:var(--dim);margin-top:4px;line-height:1.5}
.opt .v{font-size:15px;color:var(--gold2);white-space:nowrap;margin-left:10px}
.opt.on{border-color:var(--gold);background:var(--panel2)}
.sw{width:40px;height:24px;border:1px solid rgba(237,234,228,.22);background:#050607;position:relative;flex:0 0 40px;margin-left:10px;transition:.15s}
.sw::after{content:"";position:absolute;top:3px;left:3px;width:16px;height:16px;background:#6E747D;transition:.15s}
.opt.on .sw{border-color:var(--gold);background:rgba(200,164,92,.15)}
.opt.on .sw::after{left:19px;background:var(--gold2)}

label{display:block;font-size:13px;color:var(--muted);margin:16px 0 6px;letter-spacing:.05em}
input,textarea,select{
  width:100%;padding:13px 14px;background:#0b0d10;border:1px solid var(--edge);
  color:var(--ink);font-size:16px;font-family:inherit;outline:none;border-radius:0;
  -webkit-appearance:none;
}
input:focus,textarea:focus,select:focus{border-color:var(--gold)}
textarea{resize:vertical;line-height:1.6}

.btn{display:block;width:100%;padding:15px;border:none;font-size:15px;font-weight:700;
  letter-spacing:.06em;cursor:pointer;font-family:inherit;touch-action:manipulation;
  transition:transform .16s cubic-bezier(.2,.8,.2,1),filter .16s ease,opacity .16s}
.btn:active{transform:scale(.97);filter:brightness(.94)}
.btn-gold{background:var(--gold);color:#161207}
.btn-ghost{background:transparent;color:var(--muted);border:1px solid var(--edge)}
.btn:disabled{opacity:.5}

.bar{position:fixed;left:0;right:0;bottom:0;background:#0b0d10;border-top:1px solid var(--edge);
  padding:12px 18px calc(12px + var(--safe));
  display:flex;align-items:center;justify-content:space-between;gap:14px;z-index:40}
.bar .sum{font-size:12px;color:var(--dim)}
.bar .sum b{display:block;font-size:23px;color:var(--gold2);font-weight:400;font-variant-numeric:tabular-nums}
.bar .btn{width:auto;padding:14px 26px;white-space:nowrap}

.row{display:flex;justify-content:space-between;align-items:baseline;padding:10px 0;border-top:1px solid var(--line);font-size:14px}
.row:first-child{border-top:none}
.row .k{color:var(--dim)}
.row .v{font-variant-numeric:tabular-nums;text-align:right}

.pill{display:inline-block;font-size:12px;padding:3px 9px;border:1px solid var(--edge);color:var(--muted)}
.pill.wait{border-color:rgba(200,164,92,.4);color:var(--gold2)}
.pill.doing{border-color:rgba(78,154,107,.5);color:#7ec89b}
.pill.done{border-color:rgba(140,140,140,.3);color:var(--dim)}
.pill.cancel{border-color:rgba(179,52,42,.5);color:#d47a70}

table{width:100%;border-collapse:collapse;font-size:13px}
th,td{border-bottom:1px solid var(--line);padding:10px 8px;text-align:left;vertical-align:top}
th{color:var(--gold);font-weight:500;white-space:nowrap;font-size:12px;letter-spacing:.06em}

.msg{font-size:14px;line-height:1.7;padding:12px 14px;margin-top:14px;border:1px solid var(--edge)}
.msg.err{border-color:rgba(179,52,42,.6);color:#e08a80}
.msg.ok{border-color:rgba(78,154,107,.6);color:#8fd0aa}

.code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:22px;letter-spacing:.1em;color:var(--gold2)}

/* 订单凭证 */
.ticket{background:var(--panel2);border:1px solid rgba(200,164,92,.4);padding:22px;margin-top:16px;position:relative}
.ticket::before,.ticket::after{content:"";position:absolute;width:10px;height:10px;background:var(--bg);border-radius:50%;top:50%;margin-top:-5px}
.ticket::before{left:-5px}
.ticket::after{right:-5px}
.ticket .t1{font-size:12px;color:var(--dim);letter-spacing:.12em}
.ticket .code{margin:8px 0 14px;cursor:pointer;display:inline-block}
.ticket .cp{font-size:12px;color:var(--gold);margin-left:8px;border-bottom:1px dashed rgba(200,164,92,.5)}

.toast{position:fixed;left:50%;bottom:calc(104px + var(--safe));transform:translateX(-50%);
  background:#13100A;border:1px solid var(--gold);color:var(--gold2);
  padding:10px 18px;font-size:14px;z-index:60;opacity:0;transition:.2s;pointer-events:none;white-space:nowrap}
.toast.on{opacity:1}

.wxtip{display:none;margin-top:14px;border:1px solid var(--line);padding:12px 14px;font-size:13px;color:var(--muted);line-height:1.7;background:rgba(15,18,22,.6)}
.wxtip b{color:var(--gold2);font-weight:400}

.install{margin-top:16px;border:1px solid rgba(200,164,92,.28);padding:16px 18px;background:rgba(19,16,10,.55)}
.install-h{font-size:15px;color:var(--gold2);letter-spacing:.06em}
.install ol{margin:12px 0 0 20px;font-size:14px;line-height:1.95;color:var(--muted)}
.install ol li{margin-bottom:4px}
.install b{color:var(--ink);font-weight:400}

details{border:1px solid var(--edge);background:var(--panel-soft);margin-top:16px;padding:0 18px}
details summary{cursor:pointer;padding:16px 0;font-size:14px;color:var(--muted);list-style:none;letter-spacing:.04em}
details summary::-webkit-details-marker{display:none}
details summary::after{content:"＋";float:right;color:var(--gold)}
details[open] summary::after{content:"－"}
details .body{padding:4px 0 18px;font-size:14px;line-height:1.95;color:var(--muted)}
details .body p + p{margin-top:14px}
details .body b{color:var(--gold2);font-weight:400;display:block;margin-bottom:2px}

@media(max-width:380px){
  h1{font-size:27px}
  .tier .p{font-size:22px}
  .tier .d{font-size:10px}
  .tier .n{font-size:10px}
}