:root {
  color-scheme: light;
  --ink: #211a18;
  --muted: #756a65;
  --paper: #fffaf6;
  --surface: #fffefd;
  --accent: #e8473c;
  --accent-soft: #fff0ea;
  --line: rgba(70, 48, 41, .13);
}

* {
  box-sizing: border-box;
}

html {
  background: var(--paper);
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 92% 4%, rgba(255, 164, 136, .16), transparent 28rem),
    var(--paper);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--accent);
  text-underline-offset: 3px;
}

.site-header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 250, 246, .9);
  backdrop-filter: blur(18px);
}

.nav {
  width: min(920px, calc(100% - 36px));
  min-height: 70px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.brand img {
  width: 36px;
  height: 36px;
}

.nav-link {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
}

main {
  width: min(840px, calc(100% - 36px));
  margin: 0 auto;
  padding: 58px 0 72px;
}

.eyebrow {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .12em;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 12px;
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", serif;
  font-size: clamp(36px, 7vw, 52px);
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -.035em;
}

h2 {
  margin: 38px 0 12px;
  font-size: 22px;
  line-height: 1.35;
}

h3 {
  margin: 24px 0 8px;
  font-size: 17px;
}

p,
li,
dt,
dd {
  font-size: 15px;
}

ul,
ol {
  padding-left: 1.35rem;
}

li + li {
  margin-top: 7px;
}

.muted {
  color: var(--muted);
}

.summary {
  margin: 30px 0 8px;
  padding: 22px;
  border: 1px solid rgba(232, 71, 60, .16);
  border-radius: 20px;
  background: rgba(255, 254, 253, .9);
  box-shadow: 0 16px 48px rgba(88, 57, 44, .07);
}

.notice {
  margin: 22px 0;
  padding: 16px 18px;
  border-left: 4px solid var(--accent);
  border-radius: 0 14px 14px 0;
  background: var(--accent-soft);
}

.detail-list {
  display: grid;
  grid-template-columns: minmax(120px, .36fr) minmax(0, 1fr);
  gap: 1px;
  overflow: hidden;
  margin: 22px 0;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--line);
}

.detail-list dt,
.detail-list dd {
  margin: 0;
  padding: 13px 15px;
  background: var(--surface);
}

.detail-list dt {
  color: var(--muted);
  font-weight: 700;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  margin-top: 8px;
  padding: 10px 18px;
  border-radius: 14px;
  color: #fff;
  background: var(--accent);
  font-weight: 800;
  text-decoration: none;
}

.page-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 18px;
  margin-top: 48px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
}

.page-footer a {
  color: var(--muted);
  text-decoration: none;
}

@media (max-width: 620px) {
  main {
    padding-top: 40px;
  }

  .detail-list {
    grid-template-columns: 1fr;
  }

  .detail-list dt {
    padding-bottom: 4px;
  }

  .detail-list dd {
    padding-top: 4px;
  }
}