/* 轻轻 Feather — 站点样式。单文件、无外部依赖，国内访问无阻塞。 */

:root {
  --bg: #ffffff;
  --fg: #1c1c1e;
  --muted: #6b6b70;
  --accent: #2f7d5d;
  --card: #f5f5f7;
  --border: #e3e3e8;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #111113;
    --fg: #f2f2f5;
    --muted: #9a9aa2;
    --accent: #5fbf95;
    --card: #1c1c20;
    --border: #2c2c32;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font: 16px/1.75 -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
        "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  -webkit-text-size-adjust: 100%;
}

.wrap {
  max-width: 720px;
  margin: 0 auto;
  padding: 48px 20px 72px;
}

.hero { margin-bottom: 40px; }

h1 {
  font-size: 2.2rem;
  margin: 0 0 8px;
  letter-spacing: -0.02em;
}

.tagline {
  color: var(--accent);
  font-size: 1.1rem;
  font-weight: 600;
  margin: 0 0 16px;
}

.lede { color: var(--muted); margin: 0; }

h2 {
  font-size: 1.25rem;
  margin: 40px 0 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}

h3 { font-size: 1.05rem; margin: 28px 0 8px; }

p, li { overflow-wrap: break-word; }

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

.features { padding-left: 1.2em; }
.features li { margin-bottom: 10px; }

section { margin-bottom: 8px; }

.links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 40px 0 32px;
}

.links a {
  flex: 1 1 auto;
  text-align: center;
  padding: 12px 16px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  text-decoration: none;
  font-weight: 600;
}

.back {
  display: inline-block;
  margin-bottom: 24px;
  text-decoration: none;
  color: var(--muted);
  font-size: 0.9rem;
}

.meta {
  color: var(--muted);
  font-size: 0.9rem;
  padding: 12px 16px;
  background: var(--card);
  border-radius: 10px;
  margin-bottom: 28px;
}

.callout {
  padding: 16px;
  background: var(--card);
  border-left: 3px solid var(--accent);
  border-radius: 8px;
  margin: 20px 0;
}

details {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 16px;
  margin-bottom: 10px;
}

details > summary {
  cursor: pointer;
  font-weight: 600;
}

details[open] > summary { margin-bottom: 8px; }

table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 0.95rem;
}

th, td {
  border: 1px solid var(--border);
  padding: 8px 10px;
  text-align: left;
}

th { background: var(--card); }

.table-scroll { overflow-x: auto; }

footer {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
}

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