:root {
  --pzt-primary: #1a73e8;
  --pzt-bg: #f8f9fa;
  --pzt-text: #202124;
  --pzt-text-secondary: #5f6368;
  --pzt-border: #dadce0;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--pzt-bg);
  color: var(--pzt-text);
  line-height: 1.6;
}
a { color: var(--pzt-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
.wrap { max-width: 800px; margin: 0 auto; padding: 24px; }
header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 16px 0 24px; border-bottom: 1px solid var(--pzt-border); margin-bottom: 32px;
}
.logo { font-size: 20px; font-weight: 700; color: var(--pzt-text); }
nav a { margin-left: 16px; font-size: 14px; }
h1 { font-size: 28px; margin-bottom: 8px; }
.update-date { color: var(--pzt-text-secondary); font-size: 14px; margin-bottom: 32px; }
section { margin-bottom: 32px; }
h2 { font-size: 18px; margin-bottom: 12px; }
h3 { font-size: 16px; margin: 16px 0 8px; }
p, li { font-size: 15px; line-height: 1.8; color: var(--pzt-text-secondary); }
ul { padding-left: 24px; margin-top: 8px; }
li { margin-bottom: 6px; }
table { width: 100%; border-collapse: collapse; margin: 16px 0; font-size: 14px; }
th, td { border: 1px solid var(--pzt-border); padding: 10px 16px; text-align: left; }
th { background: #fff; }
footer {
  margin-top: 48px; padding-top: 20px; border-top: 1px solid var(--pzt-border);
  font-size: 13px; color: var(--pzt-text-secondary); text-align: center;
}