:root {
  color-scheme: light;
  --paper: #f7f3ea;
  --card: #fffdf8;
  --ink: #1c2430;
  --soft: #3d4a5c;
  --line: #e4dccb;
  --link: #1a4f86;
  --mark: #f3e3b8;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "PingFang HK", "PingFang TC", "PingFang SC", "Hiragino Sans GB", "Heiti TC", "Songti TC", sans-serif;
  font-size: 1.0625rem;
  line-height: 1.65;
}

a { color: var(--link); }

a:focus-visible, .lang a:focus-visible {
  outline: 3px solid var(--link);
  outline-offset: 2px;
}

.wrap {
  max-width: 42rem;
  margin: 0 auto;
  padding: 1.25rem 1.25rem 3rem;
}

header {
  margin-bottom: 1.5rem;
}

.kicker {
  margin: 0 0 0.35rem;
  color: var(--soft);
  font-size: 0.92rem;
  letter-spacing: 0.02em;
}

h1 {
  margin: 0 0 0.4rem;
  font-size: 2rem;
  line-height: 1.2;
}

h2 {
  margin: 2rem 0 0.6rem;
  font-size: 1.35rem;
  line-height: 1.3;
}

h3 {
  margin: 1.4rem 0 0.4rem;
  font-size: 1.08rem;
}

p, li { color: var(--ink); }

.lede {
  font-size: 1.12rem;
}

nav.lang, nav.site {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 0.75rem;
  margin: 1rem 0 0;
}

nav a {
  display: inline-block;
  padding: 0.35rem 0.7rem;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 999px;
  text-decoration: none;
}

nav a:hover { background: var(--mark); }

article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 0.25rem 1.15rem 1.15rem;
  margin-top: 1.25rem;
}

code {
  font-family: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
  font-size: 0.92em;
}

.placeholder {
  background: var(--mark);
  border-radius: 12px;
  padding: 0.8rem 1rem;
}

footer {
  margin-top: 2rem;
  color: var(--soft);
  font-size: 0.95rem;
}

@media (max-width: 640px) {
  h1 { font-size: 1.7rem; }
  .wrap { padding: 1rem 1rem 2.5rem; }
}