:root {
  --brand: #10a58a;
  --text: #1c1c1e;
  --secondary: #6b6b70;
  --background: #f2f2f7;
  --card: #ffffff;
  --border: #e3e3e8;
  color-scheme: light dark;
}

@media (prefers-color-scheme: dark) {
  :root {
    --brand: #3dd9b6;
    --text: #f2f2f7;
    --secondary: #a1a1a6;
    --background: #000000;
    --card: #1c1c1e;
    --border: #38383a;
  }
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--background);
  color: var(--text);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-text-size-adjust: 100%;
}

main {
  max-width: 760px;
  margin: 0 auto;
  padding: 32px 16px 24px;
}

a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 24px;
  color: var(--text);
}
.brand img { width: 56px; height: 56px; border-radius: 13px; }
.brand strong { display: block; font-size: 20px; }
.brand span { color: var(--secondary); font-size: 14px; }

.card {
  background: var(--card);
  border-radius: 20px;
  padding: 24px;
  margin-bottom: 16px;
}

h1 { font-size: 28px; line-height: 1.3; margin: 0 0 8px; }
h2 { font-size: 22px; margin: 32px 0 8px; }
h3 { font-size: 18px; margin: 28px 0 8px; }
p, ul, ol { margin: 8px 0; }
ul, ol { padding-left: 22px; }
li { margin: 4px 0; }
hr { border: 0; border-top: 1px solid var(--border); margin: 40px 0; }
.muted { color: var(--secondary); }

.table { overflow-x: auto; margin: 12px 0; }
table { border-collapse: collapse; width: 100%; font-size: 14px; min-width: 560px; }
th, td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: var(--background); }

.langs { display: flex; gap: 12px; font-size: 14px; margin-bottom: 8px; }

footer {
  max-width: 760px;
  margin: 0 auto;
  padding: 16px 16px 40px;
  color: var(--secondary);
  font-size: 13px;
  text-align: center;
}
footer a { color: var(--secondary); }