:root {
  --bg: #f6f7f8;
  --surface: #ffffff;
  --fg: #1c2326;
  --muted: #5d6a70;
  --line: #dfe4e6;
  --accent: #0d6b6b;
  --accent-fg: #ffffff;
  --accent-soft: #e3f1f0;
  --danger: #b3261e;
  --danger-soft: #fbeae8;
  --ok: #1b6e3a;
  --ok-soft: #e4f3e9;
  --warn: #8a5a00;
  --warn-soft: #fbf0d9;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  --sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #12181a;
    --surface: #1a2225;
    --fg: #e6ecee;
    --muted: #93a2a8;
    --line: #2b373b;
    --accent: #4fc0bd;
    --accent-fg: #0b1a1a;
    --accent-soft: #19302f;
    --danger: #ff8a80;
    --danger-soft: #3a1f1d;
    --ok: #7bd49a;
    --ok-soft: #1a3022;
    --warn: #f0c36a;
    --warn-soft: #33290f;
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 15px/1.65 var(--sans);
}
a { color: var(--accent); }
h1, h2, h3 { line-height: 1.3; text-wrap: balance; margin: 0 0 .5em; }
h1 { font-size: 1.6rem; }
h2 { font-size: 1.15rem; }
p { margin: 0 0 1em; }
.muted { color: var(--muted); }
.mono { font-family: var(--mono); }

.wrap {
  max-width: 920px;
  margin: 0 auto;
  padding: 0 max(16px, env(safe-area-inset-right)) 48px max(16px, env(safe-area-inset-left));
}
.narrow { max-width: 520px; }

header.top { border-bottom: 1px solid var(--line); background: var(--surface); }
header.top .wrap { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; padding-block: 12px; }
.brand { font-weight: 700; letter-spacing: .02em; color: var(--fg); text-decoration: none; margin-right: auto; }
nav { display: flex; gap: 16px; flex-wrap: wrap; align-items: center; }
nav a { color: var(--muted); text-decoration: none; }
nav a:hover, nav a[aria-current="page"] { color: var(--fg); }
nav form { display: inline; }

main { padding-top: 32px; }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 24px; margin-bottom: 20px; }
.card h2:first-child { margin-top: 0; }

label { display: block; font-weight: 600; margin-bottom: 6px; }
.field { margin-bottom: 18px; }
.hint { font-size: .87rem; color: var(--muted); margin-top: 6px; }
input[type=text], input[type=password], input[type=number], input[type=search], select, textarea {
  width: 100%;
  padding: 10px 12px;
  font: inherit;
  color: var(--fg);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 8px;
}
input.code-input { font-family: var(--mono); font-size: 1.15rem; letter-spacing: .12em; text-transform: uppercase; }
textarea { font-family: var(--mono); font-size: .9rem; min-height: 220px; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

button, .btn {
  display: inline-block;
  font: inherit;
  font-weight: 600;
  padding: 10px 18px;
  border-radius: 8px;
  border: 1px solid var(--accent);
  background: var(--accent);
  color: var(--accent-fg);
  cursor: pointer;
  text-decoration: none;
}
button.secondary, .btn.secondary { background: transparent; color: var(--accent); }
button.danger { background: transparent; color: var(--danger); border-color: var(--danger); }
button.small { padding: 4px 10px; font-size: .85rem; font-weight: 500; }
button:hover { filter: brightness(1.08); }

.alert { padding: 12px 14px; border-radius: 8px; margin-bottom: 18px; border: 1px solid transparent; }
.alert.error { background: var(--danger-soft); color: var(--danger); border-color: var(--danger); }
.alert.ok { background: var(--ok-soft); color: var(--ok); border-color: var(--ok); }
.alert.warn { background: var(--warn-soft); color: var(--warn); border-color: var(--warn); }

.copy-row { display: flex; gap: 8px; }
.copy-row input { font-family: var(--mono); font-size: .88rem; }

dl.facts { display: grid; grid-template-columns: max-content 1fr; gap: 8px 20px; margin: 0 0 18px; }
dl.facts dt { color: var(--muted); }
dl.facts dd { margin: 0; font-variant-numeric: tabular-nums; }

progress.meter {
  display: block; width: 100%; height: 8px; margin-top: 6px;
  appearance: none; -webkit-appearance: none; border: 0; border-radius: 4px; overflow: hidden;
  background: var(--line); color: var(--accent);
}
progress.meter::-webkit-progress-bar { background: var(--line); }
progress.meter::-webkit-progress-value { background: var(--accent); }
progress.meter::-moz-progress-bar { background: var(--accent); }

.m0 { margin: 0; }
.field.tight { margin-bottom: 14px; }
.field.after-summary { margin-top: 14px; }
.submit-row { margin-top: 20px; }
.inline { display: inline; }
.row.spread { justify-content: space-between; margin-bottom: 12px; }
.price-input { width: 6.5em; padding: 4px 8px; font-variant-numeric: tabular-nums; }

/* 套餐和支付方式的选择卡片 */
fieldset.choices { border: 0; margin: 0 0 22px; padding: 0; min-width: 0; }
fieldset.choices legend { font-weight: 600; margin-bottom: 8px; padding: 0; }
.choice {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 14px; margin-bottom: 8px;
  border: 1px solid var(--line); border-radius: 8px; background: var(--bg);
  font-weight: 400; cursor: pointer;
}
.choice:hover { border-color: var(--accent); }
.choice:has(input:checked) { border-color: var(--accent); background: var(--accent-soft); }
.choice:has(input:focus-visible) { outline: 2px solid var(--accent); outline-offset: 2px; }
.choice input { flex: none; width: 1.1em; height: 1.1em; accent-color: var(--accent); margin: 0; }
.choice-main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.choice .price { font-weight: 700; font-variant-numeric: tabular-nums; white-space: nowrap; }

nav .btn.small { padding: 4px 12px; font-size: .88rem; color: var(--accent-fg); }
nav .btn.small:hover { color: var(--accent-fg); }
.pill.paid { background: var(--warn-soft); color: var(--warn); }
.pill.fulfilled { background: var(--ok-soft); color: var(--ok); }
.pill.expired { background: var(--line); color: var(--muted); }

.tablewrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-variant-numeric: tabular-nums; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; vertical-align: middle; }
th { font-size: .82rem; color: var(--muted); font-weight: 600; letter-spacing: .04em; }
td.wrapcell { white-space: normal; word-break: break-all; }

.pill { display: inline-block; padding: 1px 9px; border-radius: 99px; font-size: .8rem; background: var(--line); color: var(--fg); }
.pill.unused, .pill.on { background: var(--ok-soft); color: var(--ok); }
.pill.pending { background: var(--warn-soft); color: var(--warn); }
.pill.used { background: var(--accent-soft); color: var(--accent); }
.pill.disabled, .pill.off { background: var(--danger-soft); color: var(--danger); }

.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 12px; margin-bottom: 20px; }
.stat { background: var(--surface); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; }
.stat b { display: block; font-size: 1.7rem; line-height: 1.2; font-variant-numeric: tabular-nums; }
.stat span { color: var(--muted); font-size: .87rem; }
.stat.attn b { color: var(--warn); }

.grid2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; }
.row { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.steps { padding-left: 1.2em; margin: 0 0 1em; }
.steps li { margin-bottom: .35em; }
details summary { cursor: pointer; color: var(--accent); }

@media (max-width: 520px) {
  .card { padding: 18px; }
  dl.facts { grid-template-columns: 1fr; gap: 2px; }
  dl.facts dd { margin-bottom: 10px; }
}