:root {
  --paper: #f3f0e8;
  --paper-deep: #e9e5da;
  --panel: #fffdf8;
  --ink: #1e241f;
  --muted: #6b736b;
  --line: #d7d5cb;
  --green: #315f4f;
  --green-dark: #23483c;
  --green-soft: #dfeae3;
  --serif: Georgia, "Songti SC", "STSong", serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--sans); line-height: 1.72; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.site-wrap { width: min(100% - 40px, 1120px); margin-inline: auto; }
.eyebrow { display: block; color: var(--green); font-size: 12px; font-weight: 700; letter-spacing: .16em; text-transform: uppercase; }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; border-radius: 999px; padding: 0 18px; font-size: 14px; font-weight: 650; }
.button.primary { background: var(--green); color: white; }
.button.primary:hover { background: var(--green-dark); }
.button.text { color: var(--green); }

.site-header { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid rgba(215,213,203,.85); background: rgba(243,240,232,.9); backdrop-filter: blur(16px); }
.nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 11px; }
.brand-mark { width: 38px; height: 38px; display: grid; place-items: center; border-radius: 50%; background: var(--green); color: white; font: 700 20px/1 var(--serif); }
.brand > span:last-child { display: grid; }
.brand strong { font: 700 18px/1.2 var(--serif); }
.brand small { margin-top: 3px; color: var(--muted); font-size: 11px; }
.site-nav { display: flex; gap: 24px; color: var(--muted); font-size: 14px; }
.site-nav a:hover { color: var(--green); }

.hero { min-height: 520px; display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(280px, .7fr); gap: 76px; align-items: center; padding: 88px 0 72px; border-bottom: 1px solid var(--line); }
.hero h1 { max-width: 760px; margin: 15px 0 22px; font: 700 clamp(42px, 6.5vw, 78px)/1.08 var(--serif); letter-spacing: -.045em; }
.hero-copy > p { max-width: 660px; margin: 0; color: var(--muted); font-size: 18px; }
.hero-actions { display: flex; gap: 10px; margin-top: 30px; }
.hero-aside { align-self: end; padding: 28px; border-top: 3px solid var(--green); background: rgba(255,253,248,.55); }
.hero-aside blockquote { margin: 0 0 26px; font: 22px/1.55 var(--serif); }
.hero-aside dl { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 0; }
.hero-aside dl div { display: grid; }
.hero-aside dt { font: 700 28px/1 var(--serif); }
.hero-aside dd { margin: 7px 0 0; color: var(--muted); font-size: 12px; }

.site-search { position: relative; z-index: 5; width: min(880px, 92%); margin: -30px auto 72px; padding: 16px 20px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); box-shadow: 0 18px 50px rgba(35,45,38,.08); }
.site-search label { display: grid; grid-template-columns: auto minmax(0, 1fr); align-items: center; gap: 18px; }
.site-search label span { color: var(--green); font-size: 12px; font-weight: 700; letter-spacing: .08em; }
.site-search input { width: 100%; border: 0; outline: 0; background: transparent; color: var(--ink); font: 17px var(--sans); }
.search-results { position: absolute; top: calc(100% + 8px); left: 0; right: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 10px; background: var(--panel); box-shadow: 0 20px 50px rgba(35,45,38,.14); }
.search-results a { display: grid; grid-template-columns: 88px minmax(0, 1fr); gap: 2px 14px; padding: 13px 18px; border-bottom: 1px solid var(--line); }
.search-results a:hover { background: var(--green-soft); }
.search-results span, .search-results small { color: var(--muted); font-size: 12px; }
.search-results small { grid-column: 2; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.search-results p { margin: 0; padding: 18px; color: var(--muted); }

.home-section { padding: 28px 0 82px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 26px; }
.section-heading h2 { margin: 5px 0 0; font: 700 clamp(30px, 4vw, 44px)/1.1 var(--serif); letter-spacing: -.025em; }
.section-heading > a { color: var(--green); font-size: 14px; }
.featured-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.story-card { overflow: hidden; border: 1px solid var(--line); border-radius: 11px; background: var(--panel); transition: transform .25s ease, box-shadow .25s ease; }
.story-card:hover { transform: translateY(-4px); box-shadow: 0 18px 44px rgba(38,45,39,.09); }
.story-cover { display: block; height: 230px; overflow: hidden; background: var(--green-soft); }
.story-cover img { width: 100%; height: 100%; display: block; object-fit: cover; transition: transform .5s ease; }
.story-card:hover .story-cover img { transform: scale(1.025); }
.story-cover.is-placeholder { display: grid; place-items: center; background: linear-gradient(135deg, var(--green), #789183); color: white; }
.story-cover.is-placeholder span { font: 700 28px var(--serif); letter-spacing: .12em; }
.story-body { padding: 20px; }
.story-kicker { display: flex; flex-wrap: wrap; gap: 5px 10px; color: var(--muted); font-size: 11px; }
.story-kicker span + span::before { content: "·"; margin-right: 10px; }
.story-card h3 { margin: 11px 0 10px; font: 700 24px/1.3 var(--serif); }
.story-card h3 a:hover { color: var(--green); }
.story-card p { display: -webkit-box; overflow: hidden; margin: 0; color: var(--muted); font-size: 14px; -webkit-line-clamp: 3; -webkit-box-orient: vertical; }
.tag-row { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 16px; }
.tag-row a { border-radius: 999px; padding: 4px 9px; background: var(--green-soft); color: var(--green); font-size: 11px; }

.topic-section { border-block: 1px solid var(--line); }
.topic-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.topic-grid a { position: relative; min-height: 180px; display: grid; align-content: start; padding: 22px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.topic-grid a:hover { background: var(--panel); }
.topic-grid span { color: var(--green); font: italic 14px var(--serif); }
.topic-grid strong { margin-top: 23px; font: 700 24px var(--serif); }
.topic-grid small { margin-top: 5px; color: var(--muted); }
.topic-grid em { position: absolute; right: 18px; top: 18px; color: var(--muted); font-style: normal; font-size: 11px; }

.project-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.project-grid > a { min-height: 260px; padding: 30px; border-radius: 10px; background: var(--green); color: white; }
.project-grid > a:nth-child(even) { background: #28322c; }
.project-grid span { font-size: 11px; letter-spacing: .1em; text-transform: uppercase; opacity: .72; }
.project-grid h3 { max-width: 480px; margin: 38px 0 10px; font: 700 32px/1.2 var(--serif); }
.project-grid p { max-width: 520px; margin: 0 0 26px; opacity: .76; }
.project-grid strong { font-size: 13px; }

.latest-list, .listing-grid { display: grid; gap: 16px; }
.story-card.is-compact { display: grid; grid-template-columns: 260px minmax(0, 1fr); }
.story-card.is-compact .story-cover { height: 100%; min-height: 190px; }
.story-card.is-compact .story-body { padding: 24px 26px; }
.story-card.is-compact h3 { font-size: 27px; }
.story-card.is-compact p { -webkit-line-clamp: 2; }
.about-cta { margin: 20px 0 100px; padding: 68px; text-align: center; border: 1px solid var(--line); background: var(--panel); }
.about-cta h2 { margin: 12px 0; font: 700 clamp(30px, 5vw, 52px) var(--serif); }
.about-cta p { max-width: 660px; margin: 0 auto 26px; color: var(--muted); }

.listing-hero { padding: 82px 0 48px; border-bottom: 1px solid var(--line); }
.listing-hero h1 { margin: 10px 0; font: 700 clamp(42px, 7vw, 72px)/1.08 var(--serif); }
.listing-hero p { max-width: 660px; margin: 0; color: var(--muted); font-size: 17px; }
.timeline { padding: 45px 0 100px; }
.timeline-year { display: grid; grid-template-columns: 150px minmax(0, 1fr); border-top: 1px solid var(--line); }
.timeline-year h2 { margin: 18px 0; color: var(--green); font: 700 34px var(--serif); }
.timeline-year > div a { display: grid; grid-template-columns: 80px minmax(0, 1fr) auto; gap: 18px; align-items: baseline; padding: 19px 0; border-bottom: 1px solid var(--line); }
.timeline-year time, .timeline-year span { color: var(--muted); font-size: 12px; }
.timeline-year strong { font: 600 18px var(--serif); }
.timeline-year a:hover strong { color: var(--green); }
.listing-grid { padding: 45px 0 100px; }
.all-topics { display: grid; grid-template-columns: repeat(2, 1fr); padding: 45px 0 100px; }
.all-topics a { position: relative; min-height: 180px; padding: 24px; border-bottom: 1px solid var(--line); }
.all-topics a:nth-child(odd) { border-right: 1px solid var(--line); }
.all-topics a:hover { background: var(--panel); }
.all-topics span { color: var(--green); font: italic 13px var(--serif); }
.all-topics strong { display: block; margin-top: 18px; font: 700 26px var(--serif); }
.all-topics p { margin: 5px 60px 0 0; color: var(--muted); }
.all-topics em { position: absolute; right: 22px; top: 22px; color: var(--muted); font-style: normal; font-size: 11px; }

.reading-progress { position: fixed; inset: 0 0 auto; z-index: 50; height: 3px; background: transparent; }
.reading-progress span { display: block; width: 100%; height: 100%; transform: scaleX(0); transform-origin: left; background: var(--green); }
.article { padding: 66px 0 100px; }
.article-header { max-width: 900px; margin: 0 auto 48px; }
.article-meta { display: flex; flex-wrap: wrap; gap: 7px 18px; color: var(--muted); font-size: 12px; }
.article-header h1 { max-width: 850px; margin: 16px 0; font: 700 clamp(38px, 6vw, 66px)/1.12 var(--serif); letter-spacing: -.035em; }
.article-description { max-width: 760px; margin: 0; color: var(--muted); font-size: 18px; }
.article-cover { width: 100%; max-height: 520px; display: block; margin-top: 32px; border-radius: 10px; object-fit: cover; }
.article-layout { display: grid; grid-template-columns: minmax(0, 760px) 230px; gap: 64px; justify-content: center; align-items: start; }
.article-content { min-width: 0; font-family: var(--serif); font-size: 17px; }
.article-content h1, .article-content h2, .article-content h3 { scroll-margin-top: 100px; line-height: 1.35; }
.article-content h1 { margin: 42px 0 14px; padding-bottom: 9px; border-bottom: 1px solid var(--line); font-size: 1.75em; }
.article-content h2 { margin: 36px 0 12px; font-size: 1.4em; }
.article-content h3 { margin: 28px 0 10px; font-size: 1.15em; }
.article-content p, .article-content ul, .article-content ol, .article-content blockquote, .article-content table { margin: 18px 0; }
.article-content a { color: var(--green); text-decoration: underline; text-underline-offset: 3px; }
.article-content img { height: auto; border-radius: 8px; }
.article-content blockquote { margin-left: 0; border-left: 3px solid var(--green); padding: 5px 0 5px 20px; color: var(--muted); }
.article-content code { border-radius: 4px; padding: 2px 5px; background: var(--green-soft); font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .9em; }
.article-content pre { overflow: auto; border-radius: 8px; padding: 20px; background: #202721; color: #f1f4f0; }
.article-content pre code { padding: 0; background: transparent; }
.article-content table { width: 100%; display: block; overflow-x: auto; border-collapse: collapse; font-family: var(--sans); font-size: 14px; }
.article-content th, .article-content td { min-width: 110px; border: 1px solid var(--line); padding: 9px 11px; }
.article-content th { background: var(--green-soft); }
.article-toc { position: sticky; top: 104px; max-height: calc(100vh - 130px); overflow: auto; padding-left: 18px; border-left: 1px solid var(--line); color: var(--muted); font-size: 12px; }
.article-toc > span { display: block; margin-bottom: 12px; color: var(--green); font-weight: 700; letter-spacing: .12em; }
.article-toc ul { margin: 0; padding: 0; list-style: none; }
.article-toc ul ul { padding-left: 12px; }
.article-toc li { margin: 6px 0; }
.article-toc a:hover { color: var(--green); }
.post-navigation { max-width: 1050px; display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin: 72px auto 0; padding-top: 26px; border-top: 1px solid var(--line); }
.post-navigation a { display: grid; }
.post-navigation .next { text-align: right; }
.post-navigation span { color: var(--muted); font-size: 11px; }
.post-navigation strong { margin-top: 4px; font: 600 17px var(--serif); }
.related-posts { margin-top: 80px; }
.page-article > .article-content { max-width: 760px; margin: auto; }

.site-footer { border-top: 1px solid var(--line); background: var(--paper-deep); }
.site-footer .site-wrap { min-height: 180px; display: grid; grid-template-columns: 1fr auto; gap: 28px 60px; align-items: center; padding-block: 36px; }
.site-footer strong { font: 700 24px var(--serif); }
.site-footer p, .site-footer > .site-wrap > span { margin: 4px 0 0; color: var(--muted); font-size: 12px; }
.footer-links { display: flex; gap: 20px; color: var(--muted); font-size: 13px; }
.site-footer > .site-wrap > span { grid-column: 1 / -1; }

[data-reveal] { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
[data-reveal].is-visible { opacity: 1; transform: none; }

@media (max-width: 900px) {
  .hero { grid-template-columns: 1fr; gap: 36px; min-height: auto; }
  .hero-aside { align-self: auto; }
  .featured-grid { grid-template-columns: 1fr; }
  .featured-grid .story-card { display: grid; grid-template-columns: 42% 1fr; }
  .featured-grid .story-cover { height: 100%; min-height: 230px; }
  .topic-grid { grid-template-columns: repeat(2, 1fr); }
  .article-layout { grid-template-columns: minmax(0, 760px); }
  .article-toc { display: none; }
}

@media (max-width: 640px) {
  .site-wrap { width: min(100% - 28px, 1120px); }
  .nav-wrap { min-height: 68px; }
  .brand small { display: none; }
  .site-nav { gap: 13px; font-size: 13px; }
  .hero { padding: 58px 0 64px; }
  .hero h1 { font-size: 43px; }
  .hero-copy > p { font-size: 16px; }
  .hero-aside { padding: 22px; }
  .hero-aside blockquote { font-size: 19px; }
  .site-search { width: 100%; margin-bottom: 56px; }
  .site-search label { grid-template-columns: 1fr; gap: 4px; }
  .search-results a { grid-template-columns: 1fr; }
  .search-results small { grid-column: 1; }
  .home-section { padding-bottom: 60px; }
  .section-heading { align-items: start; }
  .section-heading h2 { font-size: 34px; }
  .featured-grid .story-card, .story-card.is-compact { grid-template-columns: 1fr; }
  .story-cover, .story-card.is-compact .story-cover { height: 210px; min-height: 0; }
  .story-card.is-compact .story-body { padding: 20px; }
  .story-card.is-compact h3 { font-size: 24px; }
  .topic-grid, .project-grid, .all-topics { grid-template-columns: 1fr; }
  .topic-grid a { min-height: 150px; }
  .all-topics a:nth-child(odd) { border-right: 0; }
  .project-grid > a { min-height: 240px; padding: 24px; }
  .about-cta { padding: 44px 22px; margin-bottom: 72px; }
  .listing-hero { padding-top: 58px; }
  .timeline-year { grid-template-columns: 1fr; }
  .timeline-year h2 { margin-bottom: 4px; }
  .timeline-year > div a { grid-template-columns: 58px minmax(0, 1fr); gap: 10px; }
  .timeline-year > div span { display: none; }
  .article { padding-top: 48px; }
  .article-header h1 { font-size: 39px; }
  .article-description { font-size: 16px; }
  .article-content { font-size: 16px; }
  .post-navigation { grid-template-columns: 1fr; }
  .post-navigation .next { text-align: left; }
  .site-footer .site-wrap { grid-template-columns: 1fr; }
  .site-footer > .site-wrap > span { grid-column: 1; }
  .footer-links { flex-wrap: wrap; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
}