:root {
  color-scheme: light;
  --paper: #faf9f6;
  --ink: #34352f;
  --muted: #706f65;
  --accent: #a09478;
  --line: #e4e1d8;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--paper);
  color: var(--ink);
}

* { box-sizing: border-box; }
body { margin: 0; }
.site {
  width: min(100% - 112px, 1200px);
  min-height: 100vh;
  min-height: 100svh;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
}
.header {
  padding-block: 38px;
  border-bottom: 1px solid var(--line);
}
.domain {
  font-size: 15px;
  letter-spacing: .035em;
}
.main {
  flex: 1;
  display: flex;
  align-items: center;
  padding-block: 80px 112px;
}
.introduction { width: 100%; }
.accent {
  width: 42px;
  height: 3px;
  margin-bottom: 30px;
  background: var(--accent);
}
h1 {
  margin: 0;
  font-family: "Songti SC", "STSong", "SimSun", serif;
  font-size: clamp(30px, 4.2vw, 56px);
  font-weight: 500;
  line-height: 1.55;
  letter-spacing: .035em;
}
h1 span { display: inline-block; }
.introduction p {
  margin: 20px 0 0;
  color: var(--muted);
  font-size: 15px;
  letter-spacing: .15em;
}
.introduction .contact { letter-spacing: normal; }
.footer {
  border-top: 1px solid var(--line);
  padding-block: 24px 30px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 24px;
  color: var(--muted);
  line-height: 1.8;
}
.footer small, .registrations { font-size: 12px; }
.registrations {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}
[hidden] { display: none !important; }
a { color: inherit; text-underline-offset: 4px; }
a:hover { color: var(--ink); }
a:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }

@media (max-width: 640px) {
  .site { width: calc(100% - 48px); }
  .header { padding-block: 26px; }
  .domain { font-size: 14px; }
  .main { padding-block: 64px 88px; }
  .accent { margin-bottom: 24px; }
  h1 { font-size: clamp(25px, 6.9vw, 40px); letter-spacing: .02em; }
  h1 span { display: block; }
  .introduction p { margin-top: 18px; font-size: 14px; }
  .footer { padding-block: 20px 24px; flex-direction: column; gap: 10px; }
}

@media (max-height: 500px) and (min-width: 641px) {
  .main { padding-block: 40px; }
}