:root {
  --blue: #2563eb;
  --blue-soft: #eff6ff;
  --ink: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --bg: #f5f7fb;
  --green: #16a34a;
  --amber: #b45309;
  --amber-soft: #fffbeb;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
  -webkit-text-size-adjust: 100%;
}

a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: 760px; margin: 0 auto; padding: 0 16px; }

header.site {
  display: flex; align-items: center; gap: 12px;
  padding: 18px 0;
}
header.site img { width: 40px; height: 40px; border-radius: 10px; }
header.site .name { font-weight: 700; font-size: 18px; }
header.site nav { margin-left: auto; display: flex; gap: 18px; font-size: 15px; }

.hero { padding: 28px 0 8px; }
.hero h1 { font-size: 30px; line-height: 1.3; margin: 0 0 12px; letter-spacing: -0.01em; }
.hero p { color: var(--muted); margin: 0; font-size: 17px; }

.card {
  background: #fff; border-radius: 18px; padding: 22px; margin: 16px 0;
  border: 1px solid var(--line);
}
.card h2 { font-size: 19px; margin: 0 0 6px; }
.card h3 { font-size: 16px; margin: 18px 0 4px; }
.card p { margin: 6px 0; }
.muted { color: var(--muted); font-size: 14px; }

.btn {
  display: inline-block; background: var(--blue); color: #fff; font-weight: 600;
  padding: 13px 22px; border-radius: 14px; margin-top: 12px;
}
.btn:hover { text-decoration: none; filter: brightness(1.06); }
.btn.secondary { background: #fff; color: var(--blue); border: 1px solid #bfdbfe; }

.pill {
  display: inline-block; font-size: 12px; font-weight: 600; padding: 2px 10px; border-radius: 999px;
  background: var(--blue-soft); color: var(--blue); vertical-align: middle; margin-left: 6px;
}

ol.steps { counter-reset: step; list-style: none; padding: 0; margin: 12px 0 0; }
ol.steps > li {
  counter-increment: step; position: relative; padding: 0 0 14px 44px;
}
ol.steps > li::before {
  content: counter(step); position: absolute; left: 0; top: 0;
  width: 30px; height: 30px; border-radius: 50%; background: var(--blue-soft); color: var(--blue);
  font-weight: 700; display: flex; align-items: center; justify-content: center; font-size: 15px;
}
ol.steps > li b { display: block; }

ul.plain { padding-left: 20px; margin: 8px 0; }
ul.plain li { margin: 4px 0; }

.note {
  background: var(--amber-soft); color: var(--amber); border-radius: 12px; padding: 12px 14px;
  font-size: 14px; margin: 12px 0 0;
}

.tabs { display: flex; gap: 8px; flex-wrap: wrap; margin: 4px 0 8px; }
.tabs button {
  font: inherit; font-size: 15px; font-weight: 600; cursor: pointer;
  padding: 8px 16px; border-radius: 999px; border: 1px solid var(--line); background: #fff; color: var(--muted);
}
.tabs button[aria-selected="true"] { background: var(--blue); border-color: var(--blue); color: #fff; }
.brand { display: none; }
.brand.active { display: block; }

.path {
  display: block; background: var(--bg); border-radius: 10px; padding: 8px 12px; margin: 6px 0;
  font-size: 14px; color: var(--ink);
}

table { width: 100%; border-collapse: collapse; font-size: 15px; margin-top: 8px; }
th, td { text-align: left; padding: 10px 8px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { color: var(--muted); font-weight: 600; font-size: 13px; }

footer.site { color: var(--muted); font-size: 13px; padding: 24px 0 40px; text-align: center; }
footer.site a { color: var(--muted); margin: 0 8px; }

@media (max-width: 520px) {
  .hero h1 { font-size: 25px; }
  header.site nav { gap: 12px; font-size: 14px; }
  .card { padding: 18px; }
}