:root {
  --bg: #fbfaf8;
  --fg: #1c1a17;
  --muted: #6b6660;
  --rule: #e3ded6;
  --accent: #b4531f;
  --code-bg: #f0ece5;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #171614;
    --fg: #e8e4dd;
    --muted: #98918a;
    --rule: #322f2b;
    --accent: #e08a4f;
    --code-bg: #232120;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

.prose {
  max-width: 42rem;
  margin: 0 auto;
  padding: 4rem 1.5rem 6rem;
}

h1 { font-size: 1.9rem; line-height: 1.25; letter-spacing: -0.02em; margin: 0 0 .4rem; }
h2 { font-size: 1.1rem; margin: 2.4rem 0 .6rem; letter-spacing: -0.01em; }

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

.meta { color: var(--muted); font-size: .875rem; margin: 0 0 2rem; }

.lede {
  font-size: 1.075rem;
  border-left: 2px solid var(--accent);
  padding-left: 1rem;
  margin: 0 0 2.5rem;
}

ul { padding-left: 1.2rem; }
li { margin-bottom: .5rem; }

code {
  background: var(--code-bg);
  padding: .12em .38em;
  border-radius: 4px;
  font-size: .875em;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  word-break: break-all;
}

a { color: var(--accent); text-underline-offset: 2px; }

hr { border: 0; border-top: 1px solid var(--rule); margin: 4.5rem 0 3rem; }

.back { font-size: .875rem; margin: 0 0 2.5rem; }
.back a { text-decoration: none; color: var(--muted); }
.back a:hover { color: var(--accent); }

/* ── 首页 ── */
.hero { padding: 7rem 1.5rem 3rem; text-align: center; }
.hero h1 { font-size: 2.6rem; margin-bottom: .75rem; }
.hero p { color: var(--muted); font-size: 1.1rem; max-width: 34rem; margin: 0 auto; }

.features {
  max-width: 42rem;
  margin: 4rem auto 0;
  padding: 0 1.5rem;
  display: grid;
  gap: 2rem;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
}
.features h3 { font-size: .95rem; margin: 0 0 .35rem; }
.features p { color: var(--muted); font-size: .925rem; margin: 0; }

footer {
  margin-top: 7rem;
  padding: 2rem 1.5rem 4rem;
  border-top: 1px solid var(--rule);
  text-align: center;
  color: var(--muted);
  font-size: .875rem;
}
footer a { color: var(--muted); }