:root {
  --bg: #f4f6f8;
  --panel: #ffffff;
  --text: #17202a;
  --muted: #66717d;
  --line: #e2e7ec;
  --accent: #d73535;
  --accent-dark: #b82424;
  --accent-soft: #fff2f2;
  --warning: #8a4b10;
  --warning-bg: #fff8e8;
  --shadow: 0 10px 30px rgba(18, 30, 45, 0.06);
  --radius: 18px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.68;
}
main { width: min(920px, calc(100% - 32px)); margin: 40px auto 64px; }
.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px;
  margin-bottom: 18px;
  box-shadow: var(--shadow);
}
.hero { padding: 42px 38px; }
.eyebrow, .section-kicker {
  color: var(--accent);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .08em;
  text-transform: uppercase;
}
h1 { font-size: clamp(32px, 5vw, 48px); line-height: 1.16; margin: 10px 0 16px; letter-spacing: -0.025em; }
h2 { font-size: 24px; line-height: 1.3; margin: 6px 0 14px; }
p { margin: 0 0 12px; }
.lead { font-size: 18px; color: #3f4a56; max-width: 760px; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 24px 0 10px; }
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 18px;
  border-radius: 12px;
  border: 1px solid var(--line);
  text-decoration: none;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  transition: .18s ease;
}
.button.primary { background: var(--accent); color: white; border-color: var(--accent); }
.button.primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); transform: translateY(-1px); }
.button.secondary { background: #fff; color: #25313d; }
.button.secondary:hover { border-color: #b9c2cb; background: #fafbfc; }
.micro, .muted { color: var(--muted); font-size: 14px; }
.notice { display: flex; align-items: flex-start; gap: 16px; background: var(--warning-bg); border-color: #f0dfb9; }
.notice-icon { width: 34px; height: 34px; flex: 0 0 34px; border-radius: 50%; display: grid; place-items: center; background: #f4c55e; color: #59360a; font-weight: 900; }
.steps { list-style: none; padding: 0; margin: 22px 0 0; }
.steps li { display: grid; grid-template-columns: 38px 1fr; gap: 14px; padding: 18px 0; border-top: 1px solid var(--line); }
.steps li:first-child { border-top: 0; }
.steps p { color: #4d5965; margin: 5px 0 0; }
.step-num { width: 32px; height: 32px; border-radius: 10px; display: grid; place-items: center; background: #f1f3f5; font-weight: 800; }
code { font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; font-size: .9em; }
.grid.two { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.grid.two .panel { margin-bottom: 0; }
.checklist { margin: 12px 0 0; padding-left: 22px; }
.checklist li { margin: 9px 0; }
.danger-card { background: var(--accent-soft); border-color: #f2cccc; }
.questions { border-left: 3px solid var(--accent); padding: 4px 0 4px 18px; margin: 18px 0; }
.questions p { margin: 9px 0; }
.compact-actions { margin-top: 14px; }
.faq details { border-top: 1px solid var(--line); padding: 16px 0; }
.faq details:first-child { border-top: 0; }
.faq summary { cursor: pointer; font-weight: 700; }
.faq details p { color: #53606c; padding-top: 10px; }
footer { color: var(--muted); font-size: 13px; padding: 12px 4px; }
.text-button { border: 0; background: none; color: var(--muted); text-decoration: underline; cursor: pointer; font: inherit; margin-left: 10px; }
#versionInfo { margin-top: 8px; overflow-wrap: anywhere; }
@media (max-width: 720px) {
  main { width: min(100% - 20px, 920px); margin-top: 14px; }
  .panel, .hero { padding: 22px 20px; border-radius: 15px; }
  .grid.two { grid-template-columns: 1fr; }
  .actions .button { width: 100%; }
  h1 { font-size: 33px; }
}