:root{
  --bg:#0e1116; --card:#171b22; --line:#252b35; --txt:#e7ebf0;
  --muted:#8b95a5; --brand:#6c8cff; --brand2:#8f6cff; --ok:#37c98b; --warn:#ff7a59;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--txt);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  line-height:1.65;-webkit-font-smoothing:antialiased}
#app{max-width:640px;margin:0 auto;padding:28px 18px 80px}
.view{display:none;animation:fade .25s ease}
.view.active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
h1{font-size:26px;margin:16px 0 8px;letter-spacing:.5px}
h2{font-size:20px;margin:14px 0}
h3{font-size:15px;margin:22px 0 8px;color:var(--muted);font-weight:600}
.sub{color:var(--muted);margin:0 0 22px}
.note{font-size:12px;color:var(--muted);margin-top:26px}
.kicker{font-size:12px;letter-spacing:2px;color:var(--brand);margin:8px 0 4px}
.dims-hint{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:0 0 28px}
.dims-hint span{background:var(--card);border:1px solid var(--line);border-radius:10px;
  padding:12px;text-align:center;font-size:13px;color:var(--muted)}
.btn{border:1px solid var(--line);background:var(--card);color:var(--txt);
  padding:12px 18px;border-radius:10px;font-size:15px;cursor:pointer;
  transition:.15s;width:100%;margin-top:10px}
.btn:hover{border-color:var(--brand)}
.btn.primary{background:linear-gradient(135deg,var(--brand),var(--brand2));border:none;font-weight:600}
.btn.ghost{background:transparent}
.btn.small{width:auto;padding:8px 14px;font-size:13px;margin-top:0}
.progress{height:4px;background:var(--line);border-radius:4px;overflow:hidden;margin-top:10px}
.bar{height:100%;width:0;background:linear-gradient(90deg,var(--brand),var(--brand2));transition:.25s}
.progress-text{font-size:12px;color:var(--muted);margin:8px 0 4px}
.options{display:flex;flex-direction:column;gap:10px;margin:16px 0}
.opt{text-align:left;background:var(--card);border:1px solid var(--line);color:var(--txt);
  padding:16px;border-radius:12px;font-size:15px;cursor:pointer;transition:.15s}
.opt:hover{border-color:var(--brand);transform:translateY(-1px)}
.tagline{color:var(--brand);margin:2px 0 12px;font-size:15px}
.desc{color:#b9c2d0;font-size:15px}
.dim-bars{margin:20px 0}
.dim{margin:12px 0}
.dim-top{display:flex;justify-content:space-between;font-size:13px;margin-bottom:5px}
.dim-track{height:7px;background:var(--line);border-radius:5px;overflow:hidden}
.dim-fill{height:100%;background:linear-gradient(90deg,var(--brand),var(--brand2));border-radius:5px}
ul{padding-left:20px;margin:8px 0}
li{margin:6px 0;color:#b9c2d0}
.locked{margin-top:26px;border:1px dashed var(--line);border-radius:14px;padding:18px;background:rgba(108,140,255,.04)}
.blur{filter:blur(4px);user-select:none;opacity:.6}
.plans{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}
.plan{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;position:relative}
.plan.featured{border-color:var(--brand)}
.plan h3{color:var(--txt);margin:0 0 6px;font-size:16px}
.plan .price{font-size:24px;font-weight:700;margin:0 0 10px;
  background:linear-gradient(135deg,var(--brand),var(--brand2));-webkit-background-clip:text;background-clip:text;color:transparent}
.plan ul{padding-left:16px;font-size:13px}
.badge{position:absolute;top:-10px;right:12px;background:var(--brand);color:#fff;font-size:11px;
  padding:2px 8px;border-radius:8px}
.qr-wrap{text-align:center;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px}
#qr-img{width:100%;max-width:240px;border-radius:10px;background:#fff;padding:6px}
.qr-tip{color:var(--muted);font-size:14px;margin:12px 0 0}
.remark-box{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px;margin-top:14px}
.remark{font-family:ui-monospace,monospace;font-size:24px;letter-spacing:3px;color:var(--brand);
  text-align:center;padding:12px;background:var(--bg);border-radius:10px;margin:8px 0}
.unlock-step{margin-top:22px}
.step-no{margin:0 0 10px;font-size:13px;font-weight:700;color:var(--brand);letter-spacing:1px}
.step-tip{margin:0 0 4px;font-size:13px;color:var(--muted)}
.steps{font-size:13px;color:var(--muted);padding-left:20px}
.redeem-inline{display:flex;gap:8px;margin-top:18px}
.redeem-inline[hidden]{display:none}
.redeem-inline input{flex:1;background:var(--card);border:1px solid var(--line);color:var(--txt);
  padding:12px;border-radius:10px;font-size:15px;font-family:ui-monospace,monospace;letter-spacing:1px}
.redeem-inline .btn{margin-top:0;width:auto;white-space:nowrap}
.err{color:var(--warn);font-size:13px;min-height:18px;margin-top:10px}
.ok{color:var(--ok)}