* { margin: 0; padding: 0; box-sizing: border-box; }
:root {
  --bg: #F6F0E3;
  --paper: #FDF8EA;
  --ink: #2A2520;
  --ink-2: rgba(42,37,32,0.62);
  --ink-3: rgba(42,37,32,0.42);
  --line: rgba(42,37,32,0.10);
  --seal: #B23A2A;
  --seal-soft: rgba(178,58,42,0.12);
  --gold: #C9874C;
}
html, body {
  background: var(--bg);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
nav {
  position: sticky; top: 0; z-index: 10;
  background: rgba(246,240,227,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 0.5px solid var(--line);
}
.nav-inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 22px;
}
.logo {
  display: inline-flex; align-items: center; gap: 9px;
  color: var(--ink); text-decoration: none;
  font-weight: 700; letter-spacing: 0.04em;
}
.logo-seal {
  width: 26px; height: 26px; border-radius: 4px;
  background: var(--seal);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--paper); font-family: "Songti SC", "STSong", serif;
  font-weight: 700; font-size: 16px;
  box-shadow: 0 2px 5px rgba(178,58,42,0.32);
}
.logo-text {
  display: flex; flex-direction: column; gap: 1px;
}
.logo-zh {
  font-family: "Songti SC", "STSong", serif;
  font-size: 14px; font-weight: 700;
}
.logo-en {
  font-size: 8px; letter-spacing: 0.22em; color: var(--ink-3);
  text-transform: uppercase;
}
.nav-links { display: flex; gap: 20px; }
.nav-links a {
  color: var(--ink-2);
  text-decoration: none;
  font-size: 13px;
  font-weight: 500;
}
.nav-links a:hover { color: var(--seal); }

.page {
  max-width: 720px;
  margin: 40px auto 80px;
  padding: 0 22px;
}
h1 {
  font-family: "Songti SC", "STSong", serif;
  font-size: 36px; font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}
.updated {
  color: var(--ink-3);
  font-size: 12px; letter-spacing: 0.06em;
  margin-bottom: 28px;
}
h2 {
  font-family: "Songti SC", "STSong", serif;
  font-size: 22px; font-weight: 700;
  margin: 32px 0 10px;
  color: var(--ink);
}
h3 {
  font-size: 15px; font-weight: 600;
  margin: 18px 0 6px;
  color: var(--ink);
}
p { margin-bottom: 12px; color: var(--ink-2); }
ul { margin: 8px 0 16px 24px; color: var(--ink-2); }
li { margin-bottom: 4px; }
a { color: var(--seal); }
.callout {
  background: var(--paper);
  border: 0.5px solid var(--line);
  border-left: 3px solid var(--seal);
  padding: 14px 18px;
  border-radius: 6px;
  margin: 16px 0;
}
.callout p:last-child { margin-bottom: 0; }

/* Landing hero */
.hero {
  text-align: center;
  padding: 80px 22px 60px;
}
.hero-seal {
  width: 64px; height: 64px; border-radius: 8px;
  margin: 0 auto 22px;
  background: var(--seal);
  display: inline-flex; align-items: center; justify-content: center;
  color: var(--paper); font-family: "Songti SC", "STSong", serif;
  font-weight: 700; font-size: 40px;
  box-shadow: 0 4px 12px rgba(178,58,42,0.30);
}
.hero h1 {
  font-size: 48px; line-height: 1.1;
  margin-bottom: 12px;
}
.hero .tagline {
  color: var(--ink-2); font-size: 18px;
  margin-bottom: 28px;
}
.btn {
  display: inline-block;
  background: var(--seal); color: var(--paper);
  padding: 12px 24px; border-radius: 10px;
  text-decoration: none; font-weight: 600;
  letter-spacing: 0.02em;
  box-shadow: 0 6px 18px rgba(178,58,42,0.30);
}
.btn:hover { background: #9B2D20; }
.features {
  max-width: 720px; margin: 0 auto;
  padding: 0 22px 80px;
}
.feature {
  margin-bottom: 28px;
  padding: 18px 20px;
  background: var(--paper);
  border-radius: 10px;
  border: 0.5px solid var(--line);
}
.feature h3 {
  font-family: "Songti SC", "STSong", serif;
  font-size: 18px; color: var(--seal);
  margin-bottom: 6px;
}
.feature p { margin-bottom: 0; }

footer {
  border-top: 0.5px solid var(--line);
  padding: 28px 22px;
  text-align: center;
  color: var(--ink-3);
  font-size: 12px;
}
footer a { color: var(--ink-2); margin: 0 8px; text-decoration: none; }
footer a:hover { color: var(--seal); }