/* 亚博汇 asiabohui.com - exhibition catalogue design system
   Palette: ink navy #0f2233, paper #f6f4ee, amber accent #c47a30, slate #4d5a66
   Shape: sharp corners only (radius 0). Type: system sans + serif display. */

:root {
  --ink: #0f2233;
  --ink-soft: #24394c;
  --paper: #f6f4ee;
  --paper-alt: #ece8de;
  --line: #d5cdbd;
  --accent: #b76b22;
  --accent-soft: #f0e2d0;
  --slate: #4d5a66;
  --max: 1240px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }

a { color: var(--ink); text-decoration: none; }
a:hover { color: var(--accent); }

h1, h2, h3 {
  font-family: "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  line-height: 1.28;
  margin: 0 0 .6em;
  font-weight: 700;
  letter-spacing: .01em;
}

p { margin: 0 0 1.1em; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* ---------- top bar ---------- */
.topbar {
  background: var(--ink);
  color: #cfd8de;
  font-size: 13px;
  letter-spacing: .04em;
}
.topbar .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 40px;
  gap: 16px;
}
.topbar a { color: #cfd8de; }
.topbar a:hover { color: #f0c893; }
.topbar .dot { color: #6d7f8d; margin: 0 8px; }

/* ---------- header ---------- */
.site-head {
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 30;
}
.site-head .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 70px;
  gap: 24px;
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand img { width: 42px; height: 42px; object-fit: cover; }
.brand .brand-name {
  font-family: "Noto Serif SC", "Songti SC", Georgia, serif;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: .08em;
  line-height: 1.1;
}
.brand .brand-sub {
  display: block;
  font-family: system-ui, sans-serif;
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--slate);
  font-weight: 400;
}

.main-nav { display: flex; align-items: center; gap: 26px; }
.main-nav a {
  font-size: 15px;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
}
.main-nav a:hover { border-bottom-color: var(--accent); }
.main-nav a.is-active { border-bottom-color: var(--accent); color: var(--accent); }

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line);
  padding: 8px 12px;
  font-size: 14px;
  color: var(--ink);
  cursor: pointer;
}

/* ---------- shared blocks ---------- */
.section { padding: 72px 0; }
.section-alt { background: var(--paper-alt); }
.section-head { max-width: 720px; margin-bottom: 34px; }
.section-head h2 { font-size: 30px; margin-bottom: .35em; }
.section-head p { color: var(--slate); margin: 0; }

.btn {
  display: inline-block;
  background: var(--ink);
  color: #f6f4ee;
  padding: 14px 26px;
  font-size: 15px;
  letter-spacing: .04em;
  border: 1px solid var(--ink);
}
.btn:hover { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-ghost {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--ink);
}
.btn-ghost:hover { background: var(--ink); color: var(--paper); }

.meta-line { font-size: 13px; color: var(--slate); letter-spacing: .04em; }

/* ---------- hero: split with catalogue index column ---------- */
.hero { border-bottom: 1px solid var(--line); }
.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 0;
  align-items: stretch;
}
.hero-copy { padding: 64px 48px 64px 0; }
.hero-copy h1 { font-size: 46px; margin-bottom: .4em; }
.hero-lead { font-size: 18px; color: var(--ink-soft); max-width: 34em; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 28px; }
.hero-figure { margin: 0; position: relative; min-height: 420px; }
.hero-figure img { width: 100%; height: 100%; object-fit: cover; }

.index-band {
  background: var(--ink);
  color: #dfe6ea;
  padding: 46px 0;
}
.index-band .wrap { display: grid; grid-template-columns: repeat(4, 1fr); gap: 28px; }
.index-item { border-left: 2px solid #3c5468; padding-left: 16px; }
.index-item strong { display: block; font-size: 26px; color: #fff; font-family: Georgia, serif; }
.index-item span { font-size: 13px; letter-spacing: .06em; color: #a9b8c2; }

/* ---------- editorial two column feature ---------- */
.feature-split { display: grid; grid-template-columns: .85fr 1.15fr; gap: 48px; align-items: start; }
.feature-split figure { margin: 0; }
.feature-split figure img { width: 100%; height: 340px; object-fit: cover; }
.feature-split figcaption { font-size: 13px; color: var(--slate); padding-top: 10px; }

/* ---------- thematic list (no cards) ---------- */
.theme-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.theme-list li {
  display: grid;
  grid-template-columns: 56px 1.4fr 1fr;
  gap: 20px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}
.theme-list .num { font-family: Georgia, serif; color: var(--accent); font-size: 15px; }
.theme-list h3 { margin: 0; font-size: 19px; }
.theme-list p { margin: 0; color: var(--slate); font-size: 14.5px; }

/* ---------- gallery strip ---------- */
.gallery-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.gallery-strip figure { margin: 0; }
.gallery-strip img { height: 220px; width: 100%; object-fit: cover; }
.gallery-strip figcaption { font-size: 13px; color: var(--slate); padding-top: 8px; }

/* ---------- article listing ---------- */
.post-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.post-card { background: #fffefb; border: 1px solid var(--line); display: flex; flex-direction: column; }
.post-card img { height: 190px; width: 100%; object-fit: cover; }
.post-card .body { padding: 20px 22px 24px; }
.post-card h3 { font-size: 19px; margin-bottom: .5em; }
.post-card p { color: var(--slate); font-size: 14.5px; margin-bottom: 14px; }
.post-card .meta-line { margin-top: auto; }

/* ---------- article page ---------- */
.breadcrumb { font-size: 13px; color: var(--slate); padding: 18px 0; letter-spacing: .03em; }
.breadcrumb a { color: var(--slate); }
.breadcrumb a:hover { color: var(--accent); }

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 56px;
  padding-bottom: 72px;
  align-items: start;
}
.article-main h1 { font-size: 38px; margin-bottom: .3em; }
.article-meta { font-size: 13px; color: var(--slate); border-bottom: 1px solid var(--line); padding-bottom: 16px; margin-bottom: 28px; }
.article-lead { font-size: 18px; color: var(--ink-soft); border-left: 3px solid var(--accent); padding-left: 18px; margin-bottom: 32px; }
.article-main h2 { font-size: 25px; margin-top: 42px; }
.article-main h3 { font-size: 19px; margin-top: 30px; }
.article-main ul, .article-main ol { padding-left: 22px; margin: 0 0 1.2em; }
.article-main li { margin-bottom: .5em; }
.article-main figure { margin: 32px 0; }
.article-main figure img { width: 100%; height: 300px; object-fit: cover; }
.article-main figcaption { font-size: 13px; color: var(--slate); padding-top: 8px; }
.article-main table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 15px; }
.article-main th, .article-main td { text-align: left; padding: 12px 14px; border-bottom: 1px solid var(--line); }
.article-main th { background: var(--paper-alt); font-weight: 600; }

.article-aside { position: sticky; top: 96px; }
.aside-block { border-top: 3px solid var(--ink); padding-top: 16px; margin-bottom: 34px; }
.aside-block h3 { font-size: 16px; margin-bottom: .9em; letter-spacing: .04em; }
.related-list { list-style: none; margin: 0; padding: 0; }
.related-list li { padding: 14px 0; border-bottom: 1px solid var(--line); }
.related-list li:last-child { border-bottom: none; }
.related-list a { font-size: 15px; font-weight: 600; line-height: 1.5; display: block; margin-bottom: 4px; }
.related-list .meta-line { font-size: 12px; }
.aside-note { font-size: 14px; color: var(--slate); }

/* ---------- category page ---------- */
.cat-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: stretch;
  border-bottom: 1px solid var(--line);
}
.cat-hero .cat-copy { padding: 56px 48px 56px 0; }
.cat-hero img { width: 100%; height: 100%; min-height: 320px; object-fit: cover; }

/* ---------- footer ---------- */
.site-foot { background: var(--ink); color: #b9c6cf; padding: 56px 0 28px; }
.foot-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 36px; }
.site-foot h3 { color: #fff; font-size: 16px; margin-bottom: .9em; letter-spacing: .05em; }
.site-foot a { color: #b9c6cf; font-size: 14px; }
.site-foot a:hover { color: #f0c893; }
.site-foot ul { list-style: none; margin: 0; padding: 0; }
.site-foot li { margin-bottom: 8px; }
.site-foot p { font-size: 14px; }
.foot-bottom { border-top: 1px solid #2b4052; margin-top: 40px; padding-top: 20px; font-size: 13px; color: #8fa0ad; display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

/* ---------- responsive ---------- */
@media (max-width: 980px) {
  .hero-grid, .feature-split, .cat-hero { grid-template-columns: 1fr; }
  .hero-copy { padding: 40px 0 32px; }
  .hero-copy h1 { font-size: 34px; }
  .hero-figure { min-height: 260px; }
  .index-band .wrap { grid-template-columns: repeat(2, 1fr); }
  .post-grid { grid-template-columns: 1fr 1fr; }
  .article-layout { grid-template-columns: 1fr; gap: 36px; }
  .article-aside { position: static; }
  .foot-grid { grid-template-columns: 1fr 1fr; }
  .gallery-strip { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-toggle { display: inline-block; }
  .main-nav {
    display: none;
    position: absolute;
    left: 0; right: 0; top: 100%;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 24px 16px;
  }
  .main-nav.is-open { display: flex; }
  .main-nav a { width: 100%; padding: 12px 0; border-bottom: 1px solid var(--line); }
  .site-head .wrap { position: relative; }
  .section { padding: 48px 0; }
  .post-grid { grid-template-columns: 1fr; }
  .theme-list li { grid-template-columns: 36px 1fr; }
  .theme-list li p { grid-column: 2; }
  .article-main h1 { font-size: 28px; }
  .foot-grid { grid-template-columns: 1fr; }
  .hero-copy h1 { font-size: 29px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
}