:root {
  color-scheme: light;
  --paper: #eef1f0;
  --sheet: #fafbf9;
  --ink: #171b1f;
  --blue: #205b73;
  --muted: #686f70;
  --red: #b7452d;
  --rule: #c8cfce;
  --page: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
}
a { color: inherit; text-underline-offset: 0.25em; }
.skip-link { position: fixed; top: 1rem; left: 1rem; z-index: 10; padding: .5rem .8rem; color: white; background: var(--blue); transform: translateY(-200%); }
.skip-link:focus { transform: translateY(0); }
:focus-visible { outline: 3px solid var(--red); outline-offset: 4px; }
.site-header, main, footer { width: min(calc(100% - 3rem), var(--page)); margin-inline: auto; }
.site-header { min-height: 88px; display: flex; align-items: center; justify-content: space-between; border-bottom: 1px solid var(--rule); }
.identity { display: inline-flex; align-items: center; gap: .8rem; font-weight: 750; text-decoration: none; }
.identity span { display: grid; width: 2.3rem; aspect-ratio: 1; place-items: center; color: var(--sheet); background: var(--blue); font-family: "Songti SC", STSong, serif; font-size: 1.3rem; }
nav { display: flex; gap: 1.8rem; }

.intro-block { min-height: 570px; display: grid; grid-template-columns: 1fr 3fr; align-items: center; gap: 4rem; }
.side-caption { align-self: stretch; display: flex; align-items: center; width: 1.7rem; margin: 0; color: var(--blue); border-left: 3px solid var(--blue); writing-mode: vertical-rl; letter-spacing: .12em; font-size: .8rem; }
.intro-block > div { max-width: 780px; }
.intro-block h1 { max-width: 8em; margin: 0; font-family: "Songti SC", STSong, "Noto Serif SC", serif; font-size: clamp(4rem, 10vw, 8.6rem); font-weight: 800; line-height: 1.02; letter-spacing: -.07em; }
.intro-block > div > p { max-width: 37rem; margin: 2.2rem 0 0; color: var(--muted); font-family: "Songti SC", STSong, serif; font-size: 1.25rem; line-height: 1.9; }

.writing { padding: 5rem 0 6rem; border-top: 1px solid var(--rule); }
.writing > header { display: flex; justify-content: space-between; align-items: baseline; margin-bottom: 2rem; }
.writing > header h2, .about h2 { margin: 0; font-size: 1rem; }
.writing > header p { color: var(--muted); font-size: .85rem; }
.writing-list { border-top: 4px solid var(--ink); }
.writing-entry { display: grid; grid-template-columns: 180px 1fr; gap: 2rem; padding: 2.4rem 0; border-bottom: 1px solid var(--rule); }
.writing-entry time { padding-top: .35rem; color: var(--muted); font-size: .86rem; }
.writing-entry h2 { margin: 0; font-family: "Songti SC", STSong, serif; font-size: clamp(1.65rem, 3vw, 2.45rem); line-height: 1.25; letter-spacing: -.025em; }
.writing-entry h2 a { text-decoration-color: transparent; }
.writing-entry h2 a:hover { color: var(--blue); text-decoration-color: currentColor; }
.writing-entry p { max-width: 44rem; margin: .7rem 0 0; color: var(--muted); font-family: "Songti SC", STSong, serif; font-size: 1.05rem; }

.about { display: grid; grid-template-columns: 1fr 2fr; gap: 4rem; padding: 5rem 0; border-top: 1px solid var(--rule); }
.about div { max-width: 38rem; font-family: "Songti SC", STSong, serif; font-size: 1.12rem; }
.about div p:first-child { margin-top: 0; }
footer { display: flex; justify-content: space-between; padding: 2.4rem 0; border-top: 1px solid var(--rule); color: var(--muted); font-size: .85rem; }

.article-page { display: grid; grid-template-columns: 180px minmax(0, 720px); gap: clamp(2rem, 7vw, 7rem); justify-content: center; padding: 6rem 0 8rem; }
.margin-note { display: flex; flex-direction: column; gap: 1rem; padding-top: .4rem; color: var(--muted); font-size: .83rem; }
.margin-note a { color: var(--blue); }
.prose { min-width: 0; }
.prose > header { padding-bottom: 3rem; border-bottom: 1px solid var(--rule); }
.article-date { margin: 0 0 1.3rem; color: var(--blue); font-size: .84rem; }
.prose h1 { margin: 0; font-family: "Songti SC", STSong, serif; font-size: clamp(2.8rem, 6vw, 5.2rem); line-height: 1.12; letter-spacing: -.05em; }
.article-summary { margin: 1.5rem 0 0; color: var(--muted); font-family: "Songti SC", STSong, serif; font-size: 1.2rem; }
.article-body { padding-top: 2.5rem; font-family: "Songti SC", STSong, "Noto Serif SC", serif; font-size: 1.16rem; line-height: 2; }
.article-body p, .article-body ul, .article-body blockquote { max-width: 42em; }
.article-body h2 { margin: 2.8em 0 .8em; font-size: 1.65rem; line-height: 1.35; }
.article-body h3 { margin: 2.3em 0 .7em; font-size: 1.35rem; }
.article-body blockquote { margin: 2rem 0; padding: .2rem 0 .2rem 1.4rem; color: var(--blue); border-left: 3px solid var(--blue); }
.article-body pre { overflow-x: auto; padding: 1.25rem; color: var(--sheet); background: var(--ink); font-size: .9rem; line-height: 1.65; }
.article-body code { font-family: "SFMono-Regular", Consolas, monospace; font-size: .88em; }

@media (max-width: 700px) {
  .site-header, main, footer { width: min(calc(100% - 2rem), var(--page)); }
  .site-header { min-height: 72px; }
  nav { gap: 1rem; }
  .intro-block { min-height: 500px; grid-template-columns: 36px 1fr; gap: 1.2rem; }
  .intro-block h1 { font-size: clamp(3.5rem, 18vw, 5.5rem); }
  .writing-entry { grid-template-columns: 1fr; gap: .6rem; }
  .about { grid-template-columns: 1fr; gap: 1.5rem; }
  .article-page { display: block; padding: 3rem 0 5rem; }
  .margin-note { flex-direction: row; justify-content: space-between; margin-bottom: 3rem; }
  footer { display: block; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; }
}