:root {
  color-scheme: light;
  --paper: #f7f9fb;
  --text: #26384b;
  --muted: #526477;
  --link: #22599a;
  --line: #d8e0e8;
}
* { box-sizing: border-box; }
html { scroll-padding-top: 24px; }
body { margin: 0; background: var(--paper); color: var(--text); font-family: "PingFang SC", "Microsoft YaHei", sans-serif; font-size: 16px; line-height: 1.9; }
::selection { background: #dceafa; color: #173c67; }
a { color: var(--link); text-underline-offset: 5px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 2px solid var(--link); outline-offset: 5px; border-radius: 2px; }
.page { width: min(100% - 48px, 760px); margin-inline: auto; }
header { display: flex; justify-content: space-between; align-items: center; gap: 24px; min-height: 100px; }
.site-name { color: var(--text); font-family: Georgia, "Times New Roman", serif; font-size: 26px; text-decoration: none; }
nav { display: flex; gap: 24px; }
nav a { padding-block: 10px; font-size: 14px; }
.intro { padding: 54px 0 42px; }
h1 { margin: 0 0 16px; font-family: "Songti SC", "Noto Serif CJK SC", SimSun, serif; font-weight: 600; font-size: clamp(32px, 6vw, 44px); line-height: 1.4; }
.intro p { margin: 0; color: var(--muted); font-size: 17px; }
article { padding: 34px 0; border-top: 1px solid var(--line); }
h2 { margin: 0 0 18px; font-size: 21px; line-height: 1.6; font-weight: 600; }
p { margin: 0 0 14px; }
p:last-child { margin-bottom: 0; }
.about { margin-top: 20px; padding: 28px 0 38px; }
.about h2 { font-size: 17px; margin-bottom: 10px; }
.about p { color: var(--muted); }
footer { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; padding: 25px 0 32px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
footer a { color: var(--muted); }
.skip-link { position: absolute; left: 16px; top: -100px; padding: 8px 16px; background: white; }
.skip-link:focus { top: 12px; }
@media (max-width: 520px) {
  .page { width: calc(100% - 40px); }
  header { min-height: 80px; gap: 16px; }
  nav { gap: 18px; }
  .site-name { font-size: 23px; }
  .intro { padding: 36px 0; }
  article { padding: 28px 0; }
  h2 { font-size: 20px; }
  footer { flex-direction: column; gap: 6px; }
}