:root{
  --brand:#FF6A00;
  --brand-deep:#FF4D30;
  --ink:#111827;
  --muted:#6B7280;
  --bg:#F5F7FB;
  --card:#FFFFFF;
  --line:#E5E7EB;
  --radius:16px;
  --shadow:0 10px 24px rgba(17,24,39,.10);
  --grad:linear-gradient(135deg,#FF8A00 0%,#FF6A00 60%,#FF4D30 100%);
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"PingFang TC","PingFang HK","Microsoft JhengHei",Roboto,Segoe UI,Arial,Helvetica,sans-serif;
  color:var(--ink);
  background:var(--bg)
}
a{color:var(--brand-deep);text-decoration:none}
.wrap{max-width:720px;margin:0 auto;padding:14px 14px 88px}

/* Hero */
.hero{
  background:var(--grad);
  color:#fff;
  border-radius:22px;
  padding:14px 16px 18px;
  box-shadow:var(--shadow);
  text-align:center
}
.logo{display:flex;justify-content:center;align-items:center;margin-bottom:6px}
.oct-logo{width:210px;max-width:76vw;filter:drop-shadow(0 8px 18px rgba(0,0,0,.18))}
.oct-logo svg{width:100%;height:auto;display:block}
h1{margin:6px 0 4px;font-size:22px;line-height:1.35;font-weight:900}
.sub{margin:6px auto 10px;font-size:14px;line-height:1.55;max-width:92%;opacity:.95}
.chips{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.chip{
  font-size:12px;background:#fff;color:var(--brand-deep);
  border:1px solid rgba(255,255,255,.65);
  padding:4px 10px;border-radius:999px;
  box-shadow:0 2px 8px rgba(0,0,0,.08);font-weight:800
}

/* 面包屑 */
.crumbs{display:flex;gap:6px;align-items:center;font-size:13px;color:#6b7280;margin:12px 6px 4px}
.crumbs a{color:var(--brand-deep);text-decoration:underline;text-underline-offset:2px}

/* 面板 */
.panel{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:14px;margin-top:14px}

/* 输入 */
.input-wrap{
  border:1px solid var(--line);
  border-radius:14px;
  padding:10px 12px;
  background:#fff
}
.input-wrap input{
  width:100%;border:0;outline:none;
  font-size:15px;background:transparent
}
.err{
  display:none;
  margin-top:8px;
  color:#E11D48;
  font-size:13px;
  font-weight:700
}

/* Octopus 卡面 */
.oct-card-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.oct-card-title{font-weight:900;font-size:18px;color:var(--ink)}
.oct-home{font-size:13px;color:var(--brand-deep);text-decoration:underline;text-underline-offset:2px}
.oct-card-visual{
  border-radius:18px;
  background:linear-gradient(180deg,#3b3f46 0%,#1f2329 100%);
  border:1px solid rgba(255,255,255,.08);
  box-shadow:0 14px 28px rgba(0,0,0,.18);
  padding:14px 14px 18px;
  color:#fff;
  position:relative;
  overflow:hidden;
}
.oct-card-visual::after{
  content:"";
  position:absolute;
  inset:-40px -60px auto auto;
  width:180px;height:180px;
  background:radial-gradient(circle, rgba(255,106,0,.22), rgba(255,106,0,0) 60%);
  transform:rotate(18deg);
}
.oct-card-brand{font-weight:800;font-size:13px;opacity:.92}
.oct-card-no{margin-top:22px;font-size:15px;letter-spacing:1.2px;font-weight:800;opacity:.92}

/* 匯率（固定展示） */
.rate-row{
  display:flex;gap:10px;justify-content:space-between;align-items:center;
  background:#F9FAFB;border:1px solid var(--line);
  border-radius:14px;padding:10px 12px;margin-top:10px
}
.rate-left{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.rate-label{font-weight:900;color:var(--ink);font-size:13px}
.rate-fixed{
  font-size:14px;
  font-weight:900;
  color:#111827;
}

/* 标题 */
.only-title{font-weight:900;font-size:18px;color:var(--brand-deep);margin-bottom:10px}

/* 档位 */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.tier{
  border:1px solid var(--line);
  border-radius:14px;
  padding:12px;
  background:#fff;
  cursor:pointer;
  text-align:left;
  transition:.15s ease;
}
.tier:hover{transform:translateY(-1px)}
.tier.active{
  border-color:rgba(255,106,0,.55);
  box-shadow:0 0 0 4px rgba(255,106,0,.10);
}
.tier-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}
.price{margin:0;font-size:18px;font-weight:950;color:var(--ink)}
.tag{
  font-size:12px;font-weight:900;
  padding:4px 8px;border-radius:999px;
  background:rgba(255,106,0,.10);
  color:var(--brand-deep);
  border:1px solid rgba(255,106,0,.20);
}
.muted{font-size:13px;color:var(--muted)}
.muted b{color:var(--ink)}

/* 结算 */
.summary{margin-top:12px;border:1px solid var(--line);border-radius:14px;padding:10px 12px;background:#fff}
.summary-row{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--muted);padding:4px 0}
.summary-row b{color:var(--ink);font-size:14px}
.summary-note{margin-top:6px;font-size:12px;color:var(--brand-deep);font-weight:900}

/* 支付方式 */
.pay{display:flex;gap:10px;margin-top:12px}
.method{
  flex:1;
  border:1px solid var(--line);
  border-radius:14px;
  padding:10px 12px;
  display:flex;gap:8px;align-items:center;justify-content:center;
  font-weight:900;
  cursor:pointer;
  background:#fff;
}
.method.active{
  border-color:rgba(255,106,0,.55);
  box-shadow:0 0 0 4px rgba(255,106,0,.10);
}

/* 主按钮 */
.btn{
  width:100%;
  margin-top:12px;
  border:0;
  border-radius:16px;
  padding:12px 14px;
  font-size:16px;
  font-weight:950;
  color:#fff;
  background:var(--grad);
  cursor:pointer;
  box-shadow:0 10px 22px rgba(255,106,0,.22);
}
.btn:disabled{opacity:.55;cursor:not-allowed;box-shadow:none}
.secure{margin-top:10px;font-size:12px;color:var(--muted);text-align:center}

/* 说明 */
#guide h3{font-size:20px;color:var(--brand-deep);margin:0 0 10px;font-weight:950}
#guide ul{font-size:13px;line-height:1.8;color:#1f2937}
#guide li{margin:6px 0}

/* footer */
.footer{margin-top:18px;padding:14px;text-align:center;color:#666;font-size:12px}
.icp{display:flex;flex-direction:column;gap:6px;align-items:center}

@media (max-width:720px){ .grid{grid-template-columns:repeat(2,1fr)} }
@media (max-width:360px){ .grid{grid-template-columns:1fr} }