:root {
  --bg: #0f1720;
  --card: #182230;
  --border: #24344a;
  --text: #e6edf3;
  --muted: #8b98a9;
  --accent: #3fb950;
  --accent2: #2f81f7;
  --warn: #d29922;
  --danger: #f85149;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}
.wrap { max-width: 1080px; margin: 0 auto; padding: 32px 20px 64px; }
header.site { text-align: center; margin-bottom: 36px; }
header.site h1 { font-size: 30px; letter-spacing: 1px; }
header.site p { color: var(--muted); margin-top: 8px; }
header.site .back { display: inline-block; margin-top: 10px; color: var(--accent2); text-decoration: none; font-size: 14px; }
.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; margin-bottom: 32px; }
.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  display: flex;
  flex-direction: column;
  position: relative;
}
.card.featured { border-color: var(--accent); }
.card .name { font-size: 18px; font-weight: 600; }
.card .price { font-size: 34px; font-weight: 700; margin: 10px 0 4px; }
.card .price small { font-size: 14px; color: var(--muted); font-weight: 400; }
.card ul { list-style: none; margin: 14px 0 20px; flex: 1; }
.card ul li { padding: 5px 0; font-size: 14px; color: var(--muted); }
.card ul li b { color: var(--text); }
.card .btn {
  display: block; width: 100%; text-align: center;
  background: var(--accent); color: #0d1117; font-weight: 600;
  border: none; border-radius: 8px; padding: 11px; cursor: pointer;
  font-size: 15px; text-decoration: none;
}
.card .btn:hover { filter: brightness(1.1); }
.form-card {
  background: var(--card); border: 1px solid var(--border);
  border-radius: 12px; padding: 24px; max-width: 560px; margin: 0 auto;
}
.form-card h2 { font-size: 18px; margin-bottom: 14px; }
label { display: block; font-size: 13px; color: var(--muted); margin: 12px 0 6px; }
input[type=text], input[type=password], input[type=number], select {
  width: 100%; padding: 10px 12px; border-radius: 8px;
  border: 1px solid var(--border); background: #0d1622; color: var(--text);
  font-size: 15px;
}
input:focus, select:focus { outline: 2px solid var(--accent2); border-color: transparent; }
.btn-primary {
  width: 100%; margin-top: 18px; padding: 12px;
  background: var(--accent2); color: #fff; border: none; border-radius: 8px;
  font-size: 16px; font-weight: 600; cursor: pointer;
}
.btn-primary:hover { filter: brightness(1.12); }
.note { font-size: 12.5px; color: var(--muted); margin-top: 12px; }
.note b { color: var(--warn); }
.alert { padding: 12px 16px; border-radius: 8px; margin: 14px 0; font-size: 14px; }
.alert.err { background: rgba(248,81,73,.12); border: 1px solid var(--danger); color: var(--danger); }
.alert.ok { background: rgba(63,185,80,.12); border: 1px solid var(--accent); color: var(--accent); }
.alert.warn { background: rgba(210,153,34,.12); border: 1px solid var(--warn); color: var(--warn); }
.order-box { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 28px; max-width: 640px; margin: 0 auto; }
.order-box h2 { margin-bottom: 6px; }
.order-meta { color: var(--muted); font-size: 14px; margin-bottom: 18px; }
.qr { text-align: center; margin: 20px 0; }
.qr img { border-radius: 10px; background: #fff; padding: 8px; width: 220px; height: 220px; }
.addr {
  display: flex; gap: 8px; align-items: center;
  background: #0d1622; border: 1px dashed var(--border);
  border-radius: 8px; padding: 12px 14px; margin: 14px 0;
  font-family: ui-monospace, monospace; font-size: 13px; word-break: break-all;
}
.addr .copy-btn {
  flex-shrink: 0; background: var(--accent2); color: #fff; border: none;
  border-radius: 6px; padding: 6px 12px; cursor: pointer; font-size: 13px;
}
.big-amount { font-size: 30px; font-weight: 700; color: var(--accent); text-align: center; margin: 10px 0; }
.timer { text-align: center; color: var(--muted); font-size: 14px; margin-top: 12px; }
.pending-hint { text-align: center; color: var(--warn); font-weight: 600; margin-top: 16px; }
.spinner { display: inline-block; width: 14px; height: 14px; border: 2px solid var(--warn); border-top-color: transparent; border-radius: 50%; animation: spin 1s linear infinite; vertical-align: -2px; margin-right: 6px; }
@keyframes spin { to { transform: rotate(360deg); } }
table { width: 100%; border-collapse: collapse; background: var(--card); border-radius: 10px; overflow: hidden; font-size: 13.5px; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
th { background: #14202e; color: var(--muted); font-weight: 600; }
.badge { display: inline-block; padding: 2px 10px; border-radius: 20px; font-size: 12px; font-weight: 600; }
.badge.pending { background: rgba(210,153,34,.15); color: var(--warn); }
.badge.confirmed { background: rgba(63,185,80,.15); color: var(--accent); }
.badge.expired { background: rgba(139,152,169,.15); color: var(--muted); }
.badge.failed { background: rgba(248,81,73,.15); color: var(--danger); }
.btn-sm {
  padding: 4px 12px; border-radius: 6px; border: none; cursor: pointer;
  font-size: 12.5px; background: var(--accent2); color: #fff; text-decoration: none; display: inline-block;
}
.btn-sm.danger { background: var(--danger); }
.btn-sm.plain { background: #2d3c52; }
.tabs { display: flex; gap: 6px; margin: 20px 0; flex-wrap: wrap; }
.tabs a { padding: 8px 16px; border-radius: 8px; background: var(--card); color: var(--muted); text-decoration: none; font-size: 14px; border: 1px solid var(--border); }
.tabs a.on { background: var(--accent2); color: #fff; border-color: var(--accent2); }
.mono { font-family: ui-monospace, monospace; font-size: 12.5px; }
.footer { text-align: center; color: var(--muted); font-size: 12.5px; margin-top: 48px; }