:root,
[data-theme="light"] {
  --paper: #fafaf7;
  --ink: #20211f;
  --soft: #6d706b;
  --line: #d9dbd5;
  --accent: #2e5848;
  --code: #f0f1ec;
  --danger: #9b3e35;
  color-scheme: light;
}

[data-theme="dark"] {
  --paper: #171816;
  --ink: #eeefe9;
  --soft: #9a9d96;
  --line: #353732;
  --accent: #8ab5a1;
  --code: #20221f;
  --danger: #d58176;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Noto Sans SC", sans-serif;
  font-feature-settings: "ss01", "cv11", "tnum";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
button,input { color: inherit; font: inherit; }
p { line-height: 1.72; }
img { max-width: 100%; }
[hidden] { display: none !important; }
[lang="zh"] { display: none !important; }
html[data-lang="zh"] [lang="en"] { display: none !important; }
html[data-lang="zh"] [lang="zh"] { display: inline !important; }
::selection { color: var(--paper); background: var(--accent); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; }

.skip-link { position: fixed; z-index: 100; top: 8px; left: 8px; padding: 9px 13px; color: var(--paper); background: var(--ink); transform: translateY(-160%); }
.skip-link:focus { transform: none; }
.meta,.eyebrow { color: var(--soft); font: 10px/1.5 ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; letter-spacing: .08em; text-transform: uppercase; }
.text-link { display: inline-block; margin-top: 11px; color: var(--accent); font-size: 13px; }
.text-link:hover { text-decoration: underline; text-underline-offset: 4px; }

.site-rail { position: fixed; z-index: 20; inset: 0 auto 0 0; display: flex; width: 270px; flex-direction: column; padding: 42px 38px; border-right: 1px solid var(--line); background: var(--paper); }
.site-name { display: inline-block; font-size: 25px; line-height: 1; letter-spacing: -.04em; font-weight: 650; }
.site-identity p { margin: 18px 0 0; color: var(--soft); font-size: 12px; line-height: 1.5; }
.site-nav { display: flex; flex-direction: column; gap: 13px; margin-top: 100px; font-size: 13px; }
.site-nav a { width: max-content; color: var(--soft); }
.site-nav a:hover,.site-nav a[aria-current="page"] { color: var(--ink); }
.site-nav a[aria-current="page"]::after { content: ""; display: inline-block; width: 18px; height: 1px; margin: 0 0 4px 10px; background: currentColor; }
.site-controls { display: flex; align-items: center; gap: 14px; margin-top: 35px; }
.site-controls button,.site-controls a { border: 0; padding: 2px 0; color: var(--soft); background: transparent; cursor: pointer; font-size: 12px; }
.site-controls button:hover,.site-controls a:hover { color: var(--ink); }
.site-place { margin: auto 0 40px; color: var(--soft); font: 10px/1.5 ui-monospace, SFMono-Regular, Menlo, monospace; }

.site-main { min-height: 100vh; margin-left: 270px; }
.page { width: min(960px,calc(100% - 100px)); margin: 0 auto; padding-bottom: 110px; }
.page-wide { width: min(1080px,calc(100% - 70px)); }
.page-head { min-height: 390px; padding: 105px 0 75px; }
.page-title { margin: 38px 0 24px; font-size: clamp(50px,6.6vw,84px); line-height: 1.02; letter-spacing: -.055em; font-weight: 480; }
.page-lead { max-width: 650px; color: var(--soft); font-size: 17px; }

.home-head { display: flex; min-height: 680px; flex-direction: column; justify-content: center; padding: 90px 0; }
.home-head h1 { max-width: 900px; margin: 48px 0 34px; font-size: clamp(50px,6.1vw,84px); line-height: 1.035; letter-spacing: -.057em; font-weight: 480; }
.home-head > p:last-child { max-width: 590px; color: var(--soft); font-size: 17px; }
.content-section { display: grid; grid-template-columns: 170px 1fr; column-gap: 50px; padding: 72px 0; border-top: 1px solid var(--line); }
.section-head { display: flex; gap: 22px; align-items: baseline; }
.section-head > span { color: var(--soft); font-size: 10px; }
.section-head h2 { margin: 0; font-size: 14px; font-weight: 600; }
.section-body { grid-column: 2; }
.project-row { display: grid; grid-template-columns: 1fr 30px; padding: 0 0 38px; margin-bottom: 38px; border-bottom: 1px solid var(--line); }
.project-row:last-child { margin-bottom: 0; }
.project-row .meta,.project-row strong,.project-row p { grid-column: 1; }
.project-row strong { margin-top: 13px; font-size: 26px; letter-spacing: -.025em; font-weight: 520; }
.project-row p { margin: 8px 0 0; color: var(--soft); font-size: 13px; }
.project-row i { grid-column: 2; grid-row: 1/4; align-self: center; font-style: normal; }
.project-row:hover strong,.archive-row:hover h2 { color: var(--accent); }
.home-running strong { display: block; margin-bottom: 18px; font-size: clamp(50px,7vw,76px); letter-spacing: -.055em; font-weight: 480; }
.home-running p { max-width: 500px; color: var(--soft); }
.home-about { max-width: 640px; margin: 0; font-size: 19px; }

.projects-index { border-top: 1px solid var(--line); }
.project-case { padding: 70px 0; border-bottom: 1px solid var(--line); }
.project-case-head { display: grid; grid-template-columns: 75px minmax(0,1fr) 210px; gap: 35px; align-items: start; }
.project-case-number { color: var(--soft); font: 10px ui-monospace,monospace; }
.project-case h2 { margin: 0 0 14px; font-size: clamp(35px,4.2vw,55px); line-height: 1.05; letter-spacing: -.045em; font-weight: 490; }
.project-case-deck { max-width: 650px; margin: 0; color: var(--soft); font-size: 15px; }
.project-facts { margin: 0; padding: 0; list-style: none; }
.project-facts li { padding: 9px 0; border-top: 1px solid var(--line); color: var(--soft); font-size: 10px; }
.project-facts li:last-child { border-bottom: 1px solid var(--line); }
.project-facts b { display: block; margin-bottom: 2px; color: var(--ink); font-weight: 550; }
.project-detail { display: grid; grid-template-columns: 75px 1fr; gap: 35px; margin-top: 50px; }
.project-detail > p:first-child { margin: 0; color: var(--soft); font: 10px ui-monospace,monospace; text-transform: uppercase; }
.project-detail > div { max-width: 720px; }
.project-detail > div p { color: var(--soft); font-size: 15px; }
.project-detail ul { margin: 24px 0 0; padding-left: 18px; color: var(--soft); font-size: 13px; line-height: 1.8; }
.project-detail .text-link { margin-top: 22px; }

.filter-row { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 35px; }
.filter-row button { border: 1px solid var(--line); border-radius: 99px; padding: 7px 12px; color: var(--soft); background: transparent; cursor: pointer; font-size: 11px; }
.filter-row button.active { color: var(--paper); border-color: var(--ink); background: var(--ink); }
.archive-list { border-top: 1px solid var(--line); }
.archive-year { display: grid; grid-template-columns: 100px 1fr; gap: 25px; border-bottom: 1px solid var(--line); }
.archive-year > h2 { margin: 29px 0; color: var(--soft); font: 11px ui-monospace,monospace; }
.archive-year-entries .archive-row:last-child { border-bottom: 0; }
.archive-row { display: grid; grid-template-columns: minmax(0,1fr) 120px 35px; gap: 25px; align-items: center; padding: 27px 0; border-bottom: 1px solid var(--line); }
.archive-row h3 { margin: 0 0 6px; font-size: 22px; letter-spacing: -.02em; font-weight: 520; }
.archive-row p { margin: 0; color: var(--soft); font-size: 12px; }
.archive-row > span { color: var(--soft); font: 10px ui-monospace,monospace; }
.archive-row i { font-style: normal; }
.empty-state { max-width: 550px; padding: 72px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.empty-state h2 { margin: 0 0 14px; font-size: 27px; font-weight: 520; }
.empty-state p { margin: 0; color: var(--soft); }
.empty-compact { padding: 10px 0 0; color: var(--soft); font-size: 14px; }

.now-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 70px; padding: 70px 0; border-top: 1px solid var(--line); }
.now-block h2 { margin: 14px 0 20px; font-size: 32px; letter-spacing: -.03em; font-weight: 510; }
.now-block > p { color: var(--soft); }
.now-facts { margin-top: 35px; border-top: 1px solid var(--line); }
.now-facts div { display: flex; justify-content: space-between; gap: 20px; padding: 13px 0; border-bottom: 1px solid var(--line); font-size: 11px; }
.now-facts span:first-child { color: var(--soft); }

.about-grid { display: grid; grid-template-columns: minmax(0,1fr) 320px; gap: 90px; padding-top: 110px; }
.about-grid h1 { margin: 35px 0; font-size: clamp(50px,6vw,80px); line-height: 1; letter-spacing: -.055em; font-weight: 480; }
.about-copy p { max-width: 680px; color: var(--soft); font-size: 17px; }
.about-copy p:first-of-type { color: var(--ink); font-size: 20px; }
.about-copy blockquote { margin: 45px 0 0; padding-left: 20px; border-left: 2px solid var(--accent); color: var(--soft); }
.about-copy blockquote p { font-family: Georgia,"Times New Roman","Songti SC",serif; font-style: italic; }
.about-details { margin-top: 110px; }
.about-details div { display: flex; justify-content: space-between; gap: 20px; padding: 13px 0; border-top: 1px solid var(--line); font-size: 11px; text-align: right; }
.about-details div:last-child { border-bottom: 1px solid var(--line); }
.about-details span:first-child { color: var(--soft); text-align: left; }
.about-details b { max-width: 210px; overflow-wrap: anywhere; font-weight: 550; }

.page-footer { display: flex; gap: 30px; padding: 30px 0; border-top: 1px solid var(--line); color: var(--soft); font-size: 11px; }
.page-footer a:first-of-type { margin-left: auto; }
.page-footer a:hover { color: var(--ink); }

.search-dialog { width: min(720px,calc(100% - 32px)); max-height: min(680px,calc(100vh - 60px)); padding: 0; border: 1px solid var(--line); color: var(--ink); background: var(--paper); box-shadow: 0 22px 70px rgba(0,0,0,.22); }
.search-dialog::backdrop { background: rgba(20,21,19,.45); backdrop-filter: blur(2px); }
.search-head { display: grid; grid-template-columns: 1fr auto; align-items: center; padding: 20px 22px; border-bottom: 1px solid var(--line); }
.search-head input { width: 100%; border: 0; outline: 0; background: transparent; font-size: 18px; }
.search-head button { border: 0; padding: 4px; color: var(--soft); background: transparent; cursor: pointer; }
.search-results { max-height: 520px; overflow-y: auto; padding: 8px 22px 22px; }
.search-result { display: grid; grid-template-columns: 1fr auto; gap: 20px; padding: 17px 0; border-bottom: 1px solid var(--line); }
.search-result strong { font-size: 16px; font-weight: 520; }
.search-result span { color: var(--soft); font: 10px ui-monospace,monospace; }
.search-empty { padding: 35px 0; color: var(--soft); }

@media (max-width: 760px) {
  .site-rail { position: static; display: grid; grid-template-columns: 1fr auto; width: 100%; padding: 23px 20px; border-right: 0; border-bottom: 1px solid var(--line); }
  .site-name { font-size: 20px; }
  .site-identity p,.site-place { display: none; }
  .site-nav { grid-column: 1/-1; grid-row: 2; flex-direction: row; gap: 22px; margin-top: 22px; padding-top: 16px; border-top: 1px solid var(--line); overflow-x: auto; }
  .site-nav a { flex: 0 0 auto; }
  .site-nav a[aria-current="page"]::after { display: none; }
  .site-controls { grid-column: 2; grid-row: 1; align-self: start; margin: 0; }
  .site-main { margin: 0; }
  .page,.page-wide { width: calc(100% - 40px); padding-bottom: 95px; }
  .home-head { min-height: 560px; padding: 80px 0; }
  .home-head h1 { margin-top: 35px; font-size: 45px; }
  .page-head { min-height: 330px; padding: 75px 0 55px; }
  .page-title { font-size: 48px; }
  .content-section { display: block; padding: 55px 0; }
  .section-head { margin-bottom: 43px; }
  .section-body { grid-column: auto; }
  .project-case { padding: 55px 0; }
  .project-case-head { grid-template-columns: 45px minmax(0,1fr); gap: 15px; }
  .project-case-head .project-facts { grid-column: 2; margin-top: 35px; }
  .project-case h2 { font-size: 38px; }
  .project-detail { display: block; margin-top: 40px; }
  .project-detail > p:first-child { margin-bottom: 18px; }
  .archive-year { grid-template-columns: 65px minmax(0,1fr); gap: 12px; }
  .archive-row { grid-template-columns: minmax(0,1fr) 22px; gap: 12px; }
  .archive-row > span { display: none; }
  .now-grid { grid-template-columns: 1fr; gap: 55px; }
  .about-grid { display: block; padding-top: 75px; }
  .about-details { margin-top: 70px; }
  .page-footer { flex-wrap: wrap; padding-bottom: 55px; }
  .page-footer a:first-of-type { margin-left: 0; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
@media print { .site-rail,.search-dialog { display: none; }.site-main { margin: 0; }.page,.page-wide { width: 100%; } }