:root {
  --paper: #f3efe7;
  --paper-deep: #e7e0d3;
  --ink: #191816;
  --ink-soft: #625f59;
  --rule: #c9c0b1;
  --accent: #a83225;
  --accent-soft: #d9a49a;
  --serif: Georgia, "KingHwaOldSong", "京華老宋体", "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", STSong, SimSun, serif;
  --sans: "Avenir Next", Avenir, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  --wrap: min(1180px, calc(100vw - 64px));
  color-scheme: light;
}

:root[data-theme="dark"] {
  --paper: #181714;
  --paper-deep: #24211d;
  --ink: #eee8dc;
  --ink-soft: #aaa397;
  --rule: #454039;
  --accent: #d76756;
  --accent-soft: #6f3b33;
  color-scheme: dark;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--paper); }
body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(90deg, transparent 0, transparent calc(50% - .5px), color-mix(in srgb, var(--rule) 18%, transparent) 50%, transparent calc(50% + .5px)),
    var(--paper);
  font-family: var(--serif);
  font-size: 19px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: auto;
}

::selection { color: var(--paper); background: var(--accent); }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: .2em; }
img { display: block; max-width: 100%; height: auto; }
button, input, textarea, select { font: inherit; }
.wrap { width: var(--wrap); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; z-index: 100; left: 1rem; top: -6rem; padding: .7rem 1rem; color: var(--paper); background: var(--ink); }
.skip-link:focus { top: 1rem; }

.site-header { position: relative; z-index: 20; border-bottom: 1px solid var(--rule); background: color-mix(in srgb, var(--paper) 92%, transparent); backdrop-filter: blur(12px); }
.site-header__inner { min-height: 92px; display: grid; grid-template-columns: 230px 1fr auto; align-items: center; gap: 2rem; }
.wordmark { width: max-content; display: flex; align-items: center; gap: .7rem; text-decoration: none; }
.wordmark__avatar { width: 40px; height: 40px; display: block; flex: 0 0 40px; border: 1px solid var(--rule); border-radius: 50%; object-fit: cover; object-position: center; }
.wordmark__name { font-family: Georgia, serif; font-size: .76rem; font-weight: 700; line-height: 1.05; letter-spacing: .13em; text-transform: uppercase; }
.site-nav { justify-self: center; display: flex; align-items: center; gap: clamp(1.5rem, 4vw, 3.5rem); font-family: var(--sans); font-size: .78rem; font-weight: 600; letter-spacing: .13em; text-transform: uppercase; }
.site-nav a { position: relative; text-decoration: none; }
.site-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: -.6rem; height: 1px; background: var(--accent); transition: right .25s ease; }
.site-nav a:hover::after, .site-nav a[aria-current="page"]::after { right: 0; }
.header-actions { justify-self: end; display: flex; align-items: center; gap: 1rem; font-family: var(--sans); font-size: .73rem; letter-spacing: .08em; }
.language-switch { display: flex; gap: .3rem; align-items: center; }
.language-switch a { color: var(--ink-soft); text-decoration: none; }
.language-switch a:hover { color: var(--accent); }
.theme-toggle { width: 34px; height: 34px; border: 1px solid var(--rule); border-radius: 50%; color: var(--ink); background: transparent; cursor: pointer; transition: transform .25s ease, border-color .25s ease; }
.theme-toggle:hover { transform: rotate(180deg); border-color: var(--accent); }
.nav-toggle { display: none; }

.kicker, .hero__eyebrow { margin: 0 0 1rem; color: var(--accent); font-family: var(--sans); font-size: .73rem; font-weight: 650; line-height: 1.4; letter-spacing: .19em; text-transform: uppercase; }
.hero { padding-block: clamp(5rem, 10vw, 10rem) clamp(5rem, 9vw, 8rem); }
.hero__eyebrow { padding-left: calc(25% + 1.2rem); }
.hero__grid { display: grid; grid-template-columns: minmax(0, 3fr) minmax(250px, 1fr); gap: clamp(3rem, 8vw, 8rem); align-items: end; }
.hero__title { max-width: 900px; margin: 0; font-size: clamp(3.4rem, 7.6vw, 7.8rem); font-weight: 400; line-height: .98; letter-spacing: -.055em; }
.hero__title em { color: var(--accent); font-weight: 400; }
.hero__lead { max-width: 690px; margin: 2.7rem 0 0 17%; color: var(--ink-soft); font-size: clamp(1.05rem, 1.65vw, 1.38rem); line-height: 1.8; }
.hero__actions { margin: 2.4rem 0 0 17%; display: flex; align-items: center; gap: 2rem; }
.button { display: inline-flex; align-items: center; gap: 1.3rem; padding: .78rem 1.2rem; font-family: var(--sans); font-size: .7rem; font-weight: 650; letter-spacing: .12em; text-decoration: none; text-transform: uppercase; transition: transform .2s ease, background .2s ease; }
.button--ink { color: var(--paper); background: var(--ink); }
.button:hover { transform: translateY(-2px); }
.text-link { font-family: var(--sans); font-size: .78rem; font-weight: 650; letter-spacing: .1em; text-decoration-color: var(--accent); text-transform: uppercase; }
.hero__note { position: relative; padding: 2rem 0 0 2rem; border-left: 1px solid var(--rule); }
.hero__note-no { position: absolute; top: -1.1rem; left: -1px; padding-right: .7rem; color: var(--ink-soft); background: var(--paper); font-family: var(--sans); font-size: .64rem; }
.hero__note ul { margin: 1.8rem 0; padding: 0; list-style: none; }
.hero__note li { padding-block: .55rem; border-bottom: 1px solid var(--rule); font-size: 1rem; }
.hero__note > a { color: var(--ink-soft); font-family: var(--sans); font-size: .68rem; letter-spacing: .08em; }
.rule { height: 32px; position: relative; border-top: 1px solid var(--ink); }
.rule span { position: absolute; top: -.7rem; right: 0; padding-left: .8rem; color: var(--ink-soft); background: var(--paper); font-family: var(--sans); font-size: .6rem; letter-spacing: .15em; }

.home-section { padding-block: clamp(5rem, 9vw, 9rem); display: grid; grid-template-columns: 80px minmax(220px, 1fr) minmax(340px, 1.25fr); gap: clamp(2rem, 6vw, 6rem); border-bottom: 1px solid var(--rule); }
.section-index { font-size: 1rem; color: var(--accent); }
.section-heading h2 { margin: 0; font-size: clamp(2.3rem, 4.2vw, 4.5rem); font-weight: 400; line-height: 1.08; letter-spacing: -.035em; }
.section-copy { padding-top: 2rem; color: var(--ink-soft); font-size: 1.16rem; }
.section-copy p:first-child::first-letter { float: left; margin: .04em .12em 0 0; color: var(--accent); font-size: 4.2em; line-height: .78; }
.section-copy .text-link { display: inline-block; margin-top: 1rem; color: var(--ink); }
.home-section--tools { grid-template-columns: 80px minmax(220px, .72fr) minmax(450px, 1.5fr); }
.tool-preview-grid { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--ink); }
.tool-card { min-height: 275px; position: relative; padding: 1.5rem; border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); text-decoration: none; transition: color .25s ease, background .25s ease; }
.tool-card:nth-child(even) { border-right: 0; }
.tool-card:hover { color: var(--paper); background: var(--accent); }
.tool-card__no, .tool-card__kind { font-family: var(--sans); font-size: .58rem; letter-spacing: .14em; }
.tool-card__no { margin-right: 1rem; }
.tool-card__kind { color: var(--ink-soft); }
.tool-card:hover .tool-card__kind { color: color-mix(in srgb, var(--paper) 78%, transparent); }
.tool-card h3 { margin: 3.7rem 0 1rem; font-size: 1.55rem; font-weight: 400; line-height: 1.1; }
.tool-card p { margin: 0; color: var(--ink-soft); font-size: .9rem; line-height: 1.65; }
.tool-card:hover p { color: color-mix(in srgb, var(--paper) 82%, transparent); }
.tool-card__arrow { position: absolute; right: 1.4rem; top: 1.3rem; font-size: 1.2rem; }
.all-tools-link { grid-column: 1 / -1; padding: 1.2rem 0; font-family: var(--sans); font-size: .7rem; letter-spacing: .12em; text-transform: uppercase; text-decoration: none; }
.all-tools-link span { float: right; }
.home-section--writing { border-bottom: 0; }
.writing-list { border-top: 1px solid var(--ink); }
.writing-row { display: grid; grid-template-columns: 100px 1fr 30px; gap: 1rem; align-items: baseline; padding: 1.4rem 0; border-bottom: 1px solid var(--rule); }
.writing-row time { font-family: var(--sans); font-size: .62rem; letter-spacing: .08em; }
.writing-row h3 { margin: 0; font-size: 1.35rem; font-weight: 400; }
.writing-row h3 a, .writing-row__arrow { text-decoration: none; }
.writing-row p { margin: .25rem 0 0; color: var(--ink-soft); font-size: .86rem; line-height: 1.55; }
.writing-row__arrow { justify-self: end; color: var(--accent); }
.writing-list__more { display: inline-block; margin-top: 1.6rem; }
.closing-note { padding: clamp(5rem, 12vw, 10rem) 0; text-align: center; }
.closing-note p { margin: 0; color: var(--accent); font-size: clamp(2.2rem, 4.4vw, 4.5rem); font-style: italic; line-height: 1.15; }
.closing-note span { display: block; margin-top: 1.2rem; color: var(--ink-soft); font-family: var(--sans); font-size: .62rem; letter-spacing: .15em; text-transform: uppercase; }

.page-hero, .post-hero { padding-block: clamp(5rem, 10vw, 9rem) clamp(3.5rem, 7vw, 6rem); border-bottom: 1px solid var(--ink); }
.page-hero h1, .post-hero h1 { max-width: 1000px; margin: .8rem 0 0; font-size: clamp(3.6rem, 7.3vw, 7rem); font-weight: 400; line-height: 1; letter-spacing: -.05em; }
.page-hero__description, .post-hero__dek { max-width: 720px; margin: 2rem 0 0 17%; color: var(--ink-soft); font-size: clamp(1.05rem, 1.6vw, 1.35rem); }
.post-meta { margin: 2rem 0 0 17%; display: flex; gap: .75rem; color: var(--ink-soft); font-family: var(--sans); font-size: .65rem; letter-spacing: .12em; text-transform: uppercase; }
.article-shell { display: grid; grid-template-columns: 215px minmax(0, 760px); justify-content: center; gap: clamp(3rem, 7vw, 7rem); padding-block: clamp(4rem, 8vw, 8rem); }
.article-shell--wide { grid-template-columns: minmax(0, 1050px); }
.article-shell--no-toc { grid-template-columns: minmax(0, 760px); }
.toc-panel { align-self: start; position: sticky; top: 2rem; padding-top: .3rem; }
.toc-panel__title { margin: 0 0 1rem; padding-bottom: .8rem; border-bottom: 1px solid var(--ink); font-family: var(--sans); font-size: .64rem; font-weight: 650; letter-spacing: .15em; text-transform: uppercase; }
.toc { display: grid; gap: .55rem; }
.toc a { color: var(--ink-soft); font-family: var(--sans); font-size: .78rem; line-height: 1.5; text-decoration: none; transition: color .2s ease, transform .2s ease; }
.toc a[data-level="3"] { padding-left: .8rem; font-size: .67rem; }
.toc a:hover, .toc a.is-active { color: var(--accent); transform: translateX(3px); }
.toc:empty::after { content: "—"; color: var(--ink-soft); }

.prose { min-width: 0; font-size: 1.12rem; line-height: 1.95; }
.prose > *:first-child { margin-top: 0; }
.prose h2, .prose h3, .prose h4 { position: relative; scroll-margin-top: 2rem; font-weight: 400; line-height: 1.25; letter-spacing: -.02em; }
.prose h2 { margin: 4.8rem 0 1.5rem; padding-top: 1rem; border-top: 1px solid var(--ink); font-size: 2.35rem; }
.prose h3 { margin: 3.2rem 0 1rem; font-size: 1.65rem; }
.prose h4 { margin: 2.5rem 0 .8rem; font-size: 1.25rem; font-style: italic; }
.prose p { margin: 1.3rem 0; }
.prose > p:first-child { min-height: 3.35em; font-size: 1.22rem; }
.prose > p:first-child::first-letter { float: left; margin: .06em .1em 0 0; color: var(--accent); font-size: 4.2em; line-height: .72; }
.prose a { color: var(--accent); text-decoration-color: var(--accent-soft); }
.prose strong { font-weight: 700; }
.prose blockquote { margin: 2.5rem 0; padding: .2rem 0 .2rem 2rem; border-left: 3px solid var(--accent); color: var(--ink-soft); font-size: 1.3rem; font-style: italic; line-height: 1.75; }
.prose blockquote p { margin: .6rem 0; }
.prose ul, .prose ol { padding-left: 1.4rem; }
.prose li { margin: .45rem 0; padding-left: .35rem; }
.prose li::marker { color: var(--accent); }
.prose .task-list { padding-left: 0; list-style: none; }
.prose input[type="checkbox"] { width: 1em; height: 1em; margin-right: .55em; accent-color: var(--accent); }
.prose table { width: 100%; margin: 2.3rem 0; border-collapse: collapse; font-size: .92rem; line-height: 1.55; }
.prose th { border-top: 1px solid var(--ink); border-bottom: 1px solid var(--ink); font-family: var(--sans); font-size: .7rem; letter-spacing: .08em; text-align: left; text-transform: uppercase; }
.prose th, .prose td { padding: .8rem .65rem; }
.prose td { border-bottom: 1px solid var(--rule); }
.prose code { padding: .12em .35em; color: var(--accent); background: var(--paper-deep); font-family: var(--mono); font-size: .86em; }
.prose pre { max-width: 100%; margin: 2.2rem 0; padding: 1.4rem; overflow-x: auto; border: 1px solid var(--rule); background: #22201d; color: #eee8dc; line-height: 1.65; }
.prose pre code { padding: 0; color: inherit; background: none; }
.prose hr { width: 30%; margin: 4rem auto; border: 0; border-top: 1px solid var(--accent); }
.prose figure { margin: 2.5rem 0; }
.prose figcaption { margin-top: .6rem; color: var(--ink-soft); font-family: var(--sans); font-size: .7rem; line-height: 1.5; }
.prose .verse { margin: 2.8rem 0; font-size: 1.2rem; line-height: 2.15; letter-spacing: .06em; text-align: center; }
.prose .verse p { margin: 0; font: inherit; letter-spacing: inherit; }
.prose .verse--flush, .prose .verse--flush p { letter-spacing: .02em; text-align: left; }
.prose .postscript { margin: 2.8rem 0; padding-left: 1.4rem; border-left: 1px solid var(--rule); color: var(--ink-soft); font-size: .96rem; line-height: 1.95; }
.prose .postscript p { margin: .55rem 0; }
.prose details { margin: 2rem 0; padding: 1rem 1.2rem; border: 1px solid var(--rule); background: color-mix(in srgb, var(--paper-deep) 45%, transparent); }
.prose summary { cursor: pointer; font-weight: 700; }
.prose mark { padding: .04em .18em; color: inherit; background: color-mix(in srgb, var(--accent) 24%, transparent); }
.prose kbd { padding: .14em .38em; border: 1px solid var(--rule); border-bottom-width: 2px; border-radius: 3px; font-family: var(--mono); font-size: .78em; }
.prose .footnotes { margin-top: 5rem; padding-top: 1.5rem; border-top: 1px solid var(--ink); color: var(--ink-soft); font-size: .85rem; }
.prose .cv-date { float: right; margin: .45em 0 0 1rem; color: var(--ink-soft); font-family: var(--sans); font-size: .42em; font-weight: 600; letter-spacing: .08em; white-space: nowrap; }
.prose--wide { width: 100%; }
.page-intro { max-width: 760px; margin: 0 0 4rem; color: var(--ink-soft); font-size: 1.25rem; }

.tools-catalog { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--ink); }
.catalog-card { min-height: 330px; padding: 1.7rem; border-right: 1px solid var(--rule); border-bottom: 1px solid var(--rule); }
.catalog-card:nth-child(even) { border-right: 0; }
.catalog-card__meta, .catalog-card__footer { display: flex; justify-content: space-between; gap: 1rem; font-family: var(--sans); font-size: .6rem; letter-spacing: .11em; text-transform: uppercase; }
.catalog-card__meta { color: var(--ink-soft); }
.catalog-card h2 { margin: 4rem 0 1rem; padding: 0; border: 0; font-size: 1.8rem; }
.catalog-card h2 a { color: var(--ink); text-decoration: none; }
.catalog-card p { min-height: 5rem; color: var(--ink-soft); font-size: .92rem; line-height: 1.65; }
.catalog-card__footer { margin-top: 2rem; padding-top: 1rem; border-top: 1px solid var(--rule); }
.catalog-card__footer a { color: var(--accent); }

.archive { max-width: 980px; padding-block: 4rem 8rem; }
.archive__year { margin: 4rem 0 0; color: var(--accent); font-size: 4.5rem; font-weight: 400; line-height: 1; }
.archive__year:first-child { margin-top: 0; }
.archive-row { display: grid; grid-template-columns: 70px 1fr 30px; gap: 1.5rem; align-items: baseline; padding: 1.5rem 0; border-bottom: 1px solid var(--rule); }
.archive-row time { font-family: var(--sans); font-size: .65rem; }
.archive-row h3 { margin: 0; font-size: 1.45rem; font-weight: 400; }
.archive-row h3 a, .archive-row > a { text-decoration: none; }
.archive-row p { margin: .25rem 0 0; color: var(--ink-soft); font-size: .86rem; }
.archive-row > a { color: var(--accent); }
.post-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; padding: 2.5rem 0 6rem; border-top: 1px solid var(--ink); }
.post-nav a { display: grid; text-decoration: none; }
.post-nav small { color: var(--accent); font-family: var(--sans); font-size: .6rem; letter-spacing: .12em; text-transform: uppercase; }
.post-nav__next { text-align: right; }
.post-nav--back { grid-template-columns: 1fr; }

.site-footer { border-top: 1px solid var(--ink); background: var(--paper-deep); }
.site-footer__grid { min-height: 250px; padding-block: 3.5rem; display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 3rem; align-items: start; }
.site-footer p { margin: 0; color: var(--ink-soft); font-size: .8rem; }
.site-footer__name { color: var(--ink) !important; font-size: 1.6rem !important; }
.site-footer__links { display: grid; gap: .45rem; font-family: var(--sans); font-size: .7rem; letter-spacing: .08em; text-transform: uppercase; }
.site-footer__copy { text-align: right; font-family: var(--sans); font-size: .62rem !important; letter-spacing: .05em; }

.highlight .c, .highlight .cm, .highlight .c1 { color: #91887b; }
.highlight .k, .highlight .kd, .highlight .kn { color: #e28d7f; }
.highlight .s, .highlight .s1, .highlight .s2 { color: #c7d59f; }
.highlight .nf, .highlight .nb { color: #d6b978; }

.reveal { animation: enter .8s both cubic-bezier(.2,.7,.2,1); }
.reveal--1 { animation-delay: .08s; }
.reveal--2 { animation-delay: .16s; }
.reveal--3 { animation-delay: .24s; }
@keyframes enter { from { opacity: 0; transform: translateY(24px); } to { opacity: 1; transform: none; } }

@media (max-width: 900px) {
  :root { --wrap: min(100% - 36px, 720px); }
  .site-header__inner { min-height: 76px; grid-template-columns: 1fr auto auto; }
  .nav-toggle { width: 38px; height: 38px; display: grid; align-content: center; gap: 5px; border: 0; background: transparent; cursor: pointer; }
  .nav-toggle span:not(.sr-only) { display: block; width: 22px; height: 1px; background: var(--ink); }
  .site-nav { display: none; position: absolute; top: 76px; left: 0; right: 0; padding: 1.5rem 18px 2rem; border-bottom: 1px solid var(--ink); background: var(--paper); flex-direction: column; align-items: flex-start; gap: 1.2rem; }
  .site-nav.is-open { display: flex; }
  .hero__eyebrow { padding-left: 0; }
  .hero__grid { grid-template-columns: 1fr; }
  .hero__lead, .hero__actions, .page-hero__description, .post-hero__dek, .post-meta { margin-left: 0; }
  .hero__note { max-width: 420px; }
  .home-section, .home-section--tools { grid-template-columns: 45px 1fr; gap: 2rem; }
  .home-section > :last-child { grid-column: 2; }
  .article-shell { grid-template-columns: 1fr; }
  .toc-panel { position: static; }
  .toc { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 620px) {
  body { font-size: 18px; background: var(--paper); }
  .wordmark__name { display: none; }
  .site-header__inner { gap: .8rem; }
  .header-actions { gap: .5rem; }
  .hero { padding-top: 4rem; }
  .hero__title { font-size: clamp(2.85rem, 14vw, 4.5rem); }
  .hero__lead { margin-top: 2rem; }
  .hero__actions { align-items: flex-start; flex-direction: column; gap: 1.2rem; }
  .home-section, .home-section--tools { grid-template-columns: 1fr; gap: 1.3rem; }
  .home-section > :last-child { grid-column: 1; }
  .section-index { padding-bottom: 1rem; border-bottom: 1px solid var(--rule); }
  .tool-preview-grid, .tools-catalog { grid-template-columns: 1fr; }
  .tool-card, .tool-card:nth-child(even), .catalog-card, .catalog-card:nth-child(even) { border-right: 0; }
  .writing-row, .archive-row { grid-template-columns: 68px 1fr 20px; gap: .6rem; }
  .writing-row p, .archive-row p { display: none; }
  .page-hero h1, .post-hero h1 { font-size: clamp(3rem, 16vw, 5rem); }
  .toc { grid-template-columns: 1fr; }
  .prose { font-size: 1.05rem; }
  .prose .cv-date { float: none; display: block; margin: .45rem 0 0; font-size: .48em; }
  .prose h2 { font-size: 2rem; }
  .prose blockquote { margin-left: 0; padding-left: 1.2rem; font-size: 1.15rem; }
  .prose table { display: block; overflow-x: auto; }
  .post-nav { grid-template-columns: 1fr; }
  .post-nav__next { text-align: left; }
  .site-footer__grid { grid-template-columns: 1fr; min-height: 0; }
  .site-footer__copy { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}