:root {
  --ah-paper: #ffffff;
  --ah-soft: #f7f7f7;
  --ah-earth: #d9bd90;
  --ah-earth-deep: #aa7f40;
  --ah-ink: #322d29;
  --ah-ink-soft: #44393c;
  --ah-muted: #6c757d;
  --font-serif: Georgia, "Times New Roman", Times, serif;
  --font-sans: "Lucida Grande", Verdana, sans-serif;
  --max-shell: 1420px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--ah-paper);
  color: var(--ah-ink);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.72;
}

a { color: inherit; text-decoration: none; }

.site-header {
  width: 100%;
  padding: 26px 34px 18px;
}

.brand-strip {
  display: block;
  min-height: 150px;
  padding: 26px 30px;
  background:
    linear-gradient(90deg, rgba(217,189,144,.88), rgba(255,255,255,.38)),
    repeating-linear-gradient(135deg, rgba(50,45,41,.11) 0 1px, transparent 1px 18px);
  border: 1px solid rgba(50,45,41,.16);
}

.brand-mark {
  display: block;
  font-family: "Noto Serif SC", "Songti SC", SimSun, var(--font-serif);
  font-size: clamp(32px, 5vw, 74px);
  line-height: 1;
}

.brand-note {
  display: block;
  margin-top: 14px;
  color: var(--ah-ink-soft);
  font-family: "Noto Serif SC", "Songti SC", SimSun, var(--font-serif);
  font-size: 18px;
  letter-spacing: 0;
  line-height: 1.4;
}

.layout-shell {
  display: grid;
  grid-template-columns: minmax(190px, 18vw) minmax(0, 1fr) minmax(180px, 22vw);
  gap: 34px;
  max-width: var(--max-shell);
  margin: 0 auto;
  padding: 18px 34px 70px;
}

.side-nav {
  position: sticky;
  top: 18px;
  align-self: start;
  display: block;
  color: var(--ah-ink-soft);
  font-family: "Noto Serif SC", "Songti SC", SimSun, var(--font-serif);
}

.nav-mark {
  display: inline-block;
  margin-bottom: 26px;
  color: var(--ah-muted);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1;
}

.nav-section {
  margin-top: 28px;
}

.nav-section:first-of-type {
  margin-top: 0;
}

.nav-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 2px;
  padding: 2px 0;
  font-size: 20px;
  line-height: 1.35;
  cursor: pointer;
  list-style: none;
  transition: color .16s ease;
}

.nav-title::-webkit-details-marker {
  display: none;
}

.nav-section > .nav-title::before {
  content: "›";
  display: inline-block;
  width: 15px;
  flex: 0 0 15px;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1;
  transform: translateY(-1px);
  transition: transform .16s ease, color .16s ease;
}

.nav-section[open] > .nav-title::before {
  transform: translateY(-1px) rotate(90deg);
}

.nav-title:hover,
.nav-section[open] > .nav-title,
.nav-single.current {
  color: var(--ah-earth-deep);
}

.nav-single {
  margin-top: 28px;
  margin-bottom: 0;
}

.nav-single::before {
  content: "";
  width: 15px;
  flex: 0 0 15px;
}

.nav-children {
  display: grid;
  gap: 5px;
  margin-top: 5px;
}

.nav-child-group {
  display: grid;
  gap: 4px;
}

.nav-child {
  display: block;
  padding-left: 31px;
  min-height: 25px;
  color: var(--ah-ink-soft);
  font-size: 19px;
  line-height: 1.38;
  white-space: nowrap;
}

.nav-article-list {
  display: grid;
  gap: 3px;
  padding: 1px 0 5px 49px;
}

.nav-article {
  display: block;
  max-width: 180px;
  color: var(--ah-muted);
  font-size: 14px;
  line-height: 1.45;
}

.side-nav a {
  color: var(--ah-ink-soft);
}

.side-nav a.current,
.side-nav a:hover {
  color: var(--ah-earth-deep);
}

.nav-article.current,
.nav-article:hover {
  color: var(--ah-earth-deep);
}

.content-column {
  max-width: 920px;
}

.quote-column {
  padding-top: 18px;
  color: var(--ah-ink-soft);
}

.quote {
  font-family: var(--font-serif);
  font-size: 24px;
  line-height: 1.28;
}

.aside-note,
.research-note,
small {
  color: var(--ah-muted);
  font-size: 12px;
}

.hero-media,
.slider-placeholder,
.thumb,
.book-cover {
  display: block;
  background:
    linear-gradient(135deg, rgba(217,189,144,.92), rgba(68,57,60,.18)),
    repeating-linear-gradient(0deg, rgba(255,255,255,.35) 0 2px, transparent 2px 20px);
  border: 1px solid rgba(50,45,41,.12);
}

.hero-media.wide { aspect-ratio: 1200 / 595; }
.hero-media.portrait { aspect-ratio: 5 / 3; max-width: 760px; }
.slider-placeholder { aspect-ratio: 1200 / 595; margin: 12px 0 18px; }

.essay-block,
.news-block,
.index-intro,
.project-detail,
.contact-block {
  margin-top: 26px;
  max-width: 760px;
}

h1,
h2 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.18;
  margin: 0 0 14px;
}

h1 { font-size: clamp(30px, 4vw, 54px); }
h2 { font-size: 24px; }

.lead {
  font-family: var(--font-serif);
  font-size: clamp(20px, 2.4vw, 32px);
  line-height: 1.34;
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 22px;
}

.project-card {
  display: grid;
  gap: 10px;
}

.thumb {
  aspect-ratio: 4 / 3;
}

.facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 22px;
  margin: 24px 0;
}

.facts div {
  border-top: 1px solid rgba(50,45,41,.18);
  padding-top: 8px;
}

dt {
  color: var(--ah-muted);
  font-size: 12px;
  text-transform: uppercase;
}

dd {
  margin: 0;
}

.publication-list,
.contact-grid {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}

.publication-list article,
.contact-grid section {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 18px;
  align-items: start;
  padding-top: 18px;
  border-top: 1px solid rgba(50,45,41,.16);
}

.contact-grid section {
  grid-template-columns: 1fr;
}

.book-cover {
  width: 110px;
  aspect-ratio: 3 / 4;
}

@media (max-width: 860px) {
  .site-header { padding: 16px; }
  .brand-strip { min-height: 112px; padding: 20px; }
  .layout-shell {
    grid-template-columns: 1fr;
    gap: 22px;
    padding: 0 16px 50px;
  }
  .side-nav {
    position: static;
    padding: 10px 0 18px;
    border-bottom: 1px solid rgba(50,45,41,.14);
  }
  .nav-mark {
    margin-bottom: 18px;
  }
  .nav-section {
    margin-top: 22px;
  }
  .nav-title {
    font-size: 18px;
  }
  .nav-child {
    font-size: 17px;
    padding-left: 28px;
    white-space: normal;
  }
  .nav-article-list {
    padding-left: 43px;
  }
  .nav-article {
    max-width: none;
  }
  .quote-column {
    order: -1;
    padding-top: 0;
  }
  .project-grid,
  .facts,
  .publication-list article {
    grid-template-columns: 1fr;
  }
}

.project-archive-study {
  display: grid;
  grid-template-columns: minmax(160px, 220px) minmax(0, 1fr);
  gap: 28px;
  margin-top: 24px;
}

.project-list-study {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--ah-earth-deep);
}

.project-detail.compact {
  margin-top: 0;
}

.project-index-view {
  max-width: 820px;
}

.project-index-header {
  margin-bottom: 26px;
}

.article-card-list {
  display: grid;
  gap: 22px;
}

.article-card {
  display: grid;
  grid-template-columns: minmax(220px, 42%) minmax(0, 1fr);
  gap: 22px;
  align-items: stretch;
  padding-top: 22px;
  border-top: 1px solid rgba(50,45,41,.16);
}

.article-card-media {
  display: block;
  min-height: 180px;
  overflow: hidden;
  background: var(--ah-soft);
}

.article-card-media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border: 1px solid rgba(50,45,41,.12);
  transition: transform .2s ease;
}

.article-card:hover .article-card-media img {
  transform: scale(1.02);
}

.article-card-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 9px;
}

.article-card-meta {
  color: var(--ah-muted);
  font-size: 12px;
}

.article-card-title {
  color: var(--ah-ink);
  font-family: "Noto Serif SC", "Songti SC", SimSun, var(--font-serif);
  font-size: 28px;
  line-height: 1.25;
}

.article-card-summary {
  color: var(--ah-ink-soft);
  font-size: 14px;
  line-height: 1.75;
}

.article-card:hover .article-card-title {
  color: var(--ah-earth-deep);
}

.project-article {
  max-width: 820px;
}

.project-article-header {
  margin-bottom: 24px;
}

.article-back-link {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--ah-muted);
  font-size: 13px;
}

.article-back-link:hover {
  color: var(--ah-earth-deep);
}

.article-kicker {
  margin: 0 0 10px;
  color: var(--ah-earth-deep);
  font-size: 13px;
}

.project-summary {
  max-width: 720px;
  margin: 0;
  color: var(--ah-ink-soft);
  font-family: var(--font-serif);
  font-size: 23px;
  line-height: 1.42;
}

.article-body {
  display: grid;
  gap: 20px;
  margin-top: 28px;
}

.article-body p {
  max-width: 720px;
  margin: 0;
  color: var(--ah-ink-soft);
  font-size: 15px;
  line-height: 1.9;
}

.article-figure {
  margin: 0;
}

.article-caption {
  margin-top: 6px;
  color: var(--ah-muted);
  font-size: 12px;
  line-height: 1.5;
}

.article-figure.hero {
  margin-top: 16px;
}

.article-figure img,
.article-gallery img {
  display: block;
  width: 100%;
  height: auto;
  background: var(--ah-soft);
  border: 1px solid rgba(50,45,41,.12);
}

.article-image-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.article-image-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  align-items: start;
}

.article-image-strip.qr-pair {
  width: 100%;
  max-width: 360px;
  margin: 8px auto 0;
}

.article-image-strip.qr-pair img {
  border: 0;
}

.article-section-title {
  margin: 18px 0 0;
  padding-top: 18px;
  border-top: 1px solid rgba(50,45,41,.16);
  font-size: 28px;
}

.article-gallery {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 34px;
}

.project-info-card {
  margin-top: 34px;
  padding-top: 22px;
  border-top: 1px solid rgba(50,45,41,.18);
}

.project-info-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 24px;
  margin: 18px 0 0;
}

.project-info-list div {
  display: grid;
  gap: 4px;
  padding-top: 10px;
  border-top: 1px solid rgba(50,45,41,.12);
}

.article-footer-link {
  margin-top: 38px;
  padding-top: 20px;
  border-top: 1px solid rgba(50,45,41,.16);
}

.article-footer-link a {
  display: inline-block;
  color: var(--ah-earth-deep);
  font-family: "Noto Serif SC", "Songti SC", SimSun, var(--font-serif);
  font-size: 18px;
  line-height: 1.4;
}

.article-footer-link a:hover {
  color: var(--ah-ink);
}

@media (max-width: 860px) {
  .project-archive-study {
    grid-template-columns: 1fr;
  }
  .article-image-pair,
  .article-image-strip,
  .article-gallery,
  .article-card,
  .project-info-list {
    grid-template-columns: 1fr;
  }
  .article-image-strip.qr-pair {
    max-width: 220px;
  }
  .project-summary {
    font-size: 20px;
  }
}