:root {
  --oat: #f4f1ea;
  --oat-deep: #f3d8d2;
  --skin: #f3d8d2;
  --peach: #d96b62;
  --peach-dark: #d96b62;
  --ink: #4a4a4a;
  --muted: rgba(74, 74, 74, .72);
  --white: #f4f1ea;
  --line: rgba(74, 74, 74, .22);
  --shadow: 0 18px 42px rgba(74, 74, 74, .10);
  --serif: "Noto Serif SC", "Songti SC", Georgia, serif;
  --sans: "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--oat); color: var(--ink); font-family: var(--sans); line-height: 1.8; letter-spacing: 0; }
img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--peach-dark); }
.site-header { position: sticky; top: 0; z-index: 20; background: rgba(244,241,234,.96); backdrop-filter: blur(12px); border-bottom: 1px solid var(--line); }
.nav-wrap { width: min(1240px, calc(100% - 56px)); margin: auto; min-height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: flex; align-items: center; gap: 12px; font-family: var(--serif); letter-spacing: .04em; }
.brand-mark { width: 34px; height: 34px; border: 1px solid var(--peach); border-radius: 50%; display: grid; place-items: center; color: var(--peach); font-size: 14px; background: var(--skin); }
.brand strong { font-size: 15px; font-weight: 500; }
.site-nav { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 22px; font-size: 12px; color: var(--muted); }
.site-nav a { padding: 8px 0; border-bottom: 1px solid transparent; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--peach-dark); border-color: var(--peach); }
.nav-toggle { display: none; border: 1px solid var(--line); background: transparent; color: var(--ink); padding: 8px 11px; }
.hero { width: min(1180px, calc(100% - 56px)); margin: 54px auto 126px; display: grid; grid-template-columns: minmax(500px, 1.12fr) minmax(360px, .88fr); gap: clamp(42px, 6vw, 86px); align-items: center; }
.hero-media { border: 1px solid var(--ink); padding: 10px; box-shadow: 12px 12px 0 var(--skin); background: var(--oat); }
.hero-media img { width: 100%; height: auto; filter: none; }
.eyebrow { color: var(--peach); letter-spacing: .14em; font-size: 11px; text-transform: uppercase; }
h1, h2, h3 { font-family: var(--serif); font-weight: 500; line-height: 1.3; }
h1 { font-size: clamp(44px, 5.6vw, 78px); margin: 14px 0 24px; letter-spacing: .04em; }
h2 { font-size: clamp(28px, 4vw, 42px); margin: 0 0 18px; }
h3 { font-size: 22px; margin: 0 0 10px; }
.hero-copy { max-width: 500px; padding: 12px 0; }
.hero-copy .lead { font-family: var(--serif); font-size: clamp(22px, 2.2vw, 30px); color: var(--ink); margin-bottom: 26px; line-height: 1.65; }
.hero-copy p { color: var(--muted); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; margin-top: 32px; }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 10px 20px; border: 1px solid var(--peach); background: var(--peach); color: var(--oat); cursor: pointer; font: inherit; letter-spacing: .06em; transition: transform .2s ease, background .2s ease, color .2s ease; }
.btn:hover { transform: translateY(-2px); background: var(--ink); border-color: var(--ink); color: var(--oat); }
.btn.ghost, .btn.enter { background: transparent; color: var(--ink); border-color: var(--ink); }
.btn.ghost:hover, .btn.enter:hover { background: var(--skin); color: var(--ink); border-color: var(--peach); }
.btn.enter { min-width: 196px; font-family: var(--serif); }
.section { width: min(1120px, calc(100% - 56px)); margin: 0 auto 132px; }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 24px; border-bottom: 1px solid var(--ink); padding-bottom: 16px; margin-bottom: 34px; }
.section-head p { max-width: 520px; color: var(--muted); margin: 0; }
.intro-grid { display: grid; grid-template-columns: 1.14fr .86fr; gap: 54px; align-items: stretch; }
.paper { background: transparent; border: 1px solid var(--ink); padding: clamp(22px, 4vw, 38px); box-shadow: 8px 8px 0 var(--skin); }
.paper p:last-child { margin-bottom: 0; }
.facts { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0; background: transparent; border: 1px solid var(--ink); }
.fact { background: var(--oat); padding: 20px; border-right: 1px solid var(--ink); border-bottom: 1px solid var(--ink); }
.fact:nth-child(2n) { border-right: 0; }.fact:nth-last-child(-n+2) { border-bottom: 0; }
.fact small { display: block; color: var(--muted); margin-bottom: 4px; }
.fact strong { font-family: var(--serif); font-size: 18px; font-weight: 500; }
.gallery-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 24px; align-items: start; }
.gallery-card { margin: 0; background: var(--oat); border: 1px solid var(--ink); padding: 10px; box-shadow: 8px 8px 0 var(--skin); transition: transform .2s ease, box-shadow .2s ease; }
.gallery-card:nth-child(2), .gallery-card:nth-child(3) { margin-top: 0; }
.gallery-card:hover { transform: translateY(-4px); box-shadow: 11px 11px 0 var(--skin); }
.gallery-card img { width: 100%; height: auto; filter: none; }
.gallery-card figcaption { min-height: 82px; padding: 16px 8px 6px; font-family: var(--serif); color: var(--ink); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature { padding: 24px; background: transparent; border-top: 1px solid var(--ink); min-height: 190px; }
.feature p { color: var(--muted); margin: 0; }
.route-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.route { position: relative; padding: 22px 18px 18px; background: transparent; border-top: 1px solid var(--ink); min-height: 190px; }
.route b { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--skin); color: var(--ink); font-family: var(--serif); margin-bottom: 14px; }
.route p { color: var(--muted); font-size: 14px; }
.index-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border: 1px solid var(--ink); }
.index-card { padding: 22px 18px; background: transparent; border-right: 1px solid var(--ink); border-bottom: 1px solid var(--ink); transition: background .2s ease, color .2s ease; }
.index-card:nth-child(4n) { border-right: 0; }.index-card:nth-last-child(-n+3) { border-bottom: 0; }
.index-card:hover { background: var(--skin); color: var(--ink); }
.index-card span { display: block; color: var(--peach-dark); font-size: 12px; letter-spacing: .08em; margin-bottom: 8px; }
.index-card strong { font-family: var(--serif); font-weight: 500; }
.chapter-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.chapter-card { background: transparent; border-top: 1px solid var(--ink); padding: 22px 0; min-height: 190px; }
.chapter-card .chapter-no { display: block; color: var(--peach-dark); font-size: 12px; letter-spacing: .12em; margin-bottom: 9px; }
.chapter-card p { font-size: 14px; color: var(--muted); margin: 0; }
.analysis-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.analysis-card { background: transparent; padding: 28px; border: 1px solid var(--ink); box-shadow: 6px 6px 0 var(--skin); }
.analysis-card p { color: var(--muted); }
.timeline { position: relative; display: grid; gap: 0; margin: 24px 0; }
.timeline-item { display: grid; grid-template-columns: 105px 1fr; gap: 22px; padding: 16px 0 16px 18px; border-left: 1px solid var(--peach); }
.timeline-item strong { color: var(--peach-dark); font-family: var(--serif); }
.timeline-item p { margin: 0; color: var(--muted); }
.quote { border-left: 1px solid var(--peach); padding: 12px 0 12px 20px; font-family: var(--serif); font-size: 22px; color: var(--ink); }
.page-hero { width: min(1120px, calc(100% - 56px)); margin: 76px auto 86px; display: grid; grid-template-columns: 1.1fr .9fr; gap: 62px; align-items: center; }
.page-hero .summary { color: var(--muted); max-width: 620px; }
.page-hero-media { border: 1px solid var(--ink); padding: 8px; background: var(--oat); box-shadow: 10px 10px 0 var(--skin); }
.page-hero-media img { width: 100%; height: auto; }
.article { width: min(880px, calc(100% - 56px)); margin: 0 auto 110px; }
.article h2 { margin-top: 54px; font-size: 30px; }
.article h3 { margin-top: 28px; }
.article p, .article li { color: var(--ink); }
.article ul, .article ol { padding-left: 1.4em; }
.article .note { padding: 16px 18px; background: var(--skin); border-left: 1px solid var(--peach); color: var(--ink); }
.table { width: 100%; border-collapse: collapse; margin: 24px 0; background: transparent; }
.table th, .table td { text-align: left; padding: 12px 14px; border: 1px solid var(--ink); vertical-align: top; }
.table th { font-family: var(--serif); font-weight: 500; background: var(--skin); }
.faq-list { display: grid; gap: 12px; }
details { background: transparent; border: 1px solid var(--ink); padding: 16px 18px; }
summary { cursor: pointer; font-family: var(--serif); font-size: 18px; }
details p { color: var(--muted); margin: 12px 0 0; }
.site-footer { border-top: 1px solid var(--ink); padding: 48px 0; margin-top: 70px; background: var(--skin); }
.footer-grid { width: min(1120px, calc(100% - 56px)); margin: auto; display: grid; grid-template-columns: 1.1fr .9fr .9fr; gap: 30px; }
.footer-grid h3 { font-size: 18px; margin-bottom: 10px; }
.footer-grid p, .footer-grid li { color: var(--muted); font-size: 13px; }
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin: 6px 0; }
.footer-bottom { width: min(1120px, calc(100% - 56px)); margin: 30px auto 0; padding-top: 18px; border-top: 1px solid var(--line); font-size: 12px; color: var(--muted); display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.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; }
@media (max-width: 900px) {
  .hero, .page-hero, .intro-grid { grid-template-columns: 1fr; }
  .hero { margin-top: 32px; gap: 36px; }
  .hero-media { width: 100%; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .chapter-list { grid-template-columns: repeat(2, 1fr); }
  .route-grid { grid-template-columns: repeat(2, 1fr); }
  .index-grid { grid-template-columns: repeat(3, 1fr); }
  .index-card:nth-child(4n) { border-right: 1px solid var(--ink); }.index-card:nth-child(3n) { border-right: 0; }.index-card:nth-last-child(-n+3) { border-bottom: 0; }
}
@media (max-width: 680px) {
  .nav-wrap { width: min(100% - 28px, 1180px); min-height: 64px; }
  .nav-toggle { display: block; }
  .site-nav { display: none; position: absolute; top: 64px; left: 0; right: 0; background: var(--oat); padding: 14px 20px 18px; border-bottom: 1px solid var(--line); flex-direction: column; gap: 4px; }
  .site-nav.is-open { display: flex; }
  .section, .page-hero, .article { width: min(100% - 28px, 1180px); }
  .hero { width: min(100% - 28px, 1180px); margin: 26px auto 82px; }
  h1 { font-size: 42px; }
  .gallery-grid { grid-template-columns: 1fr; }
  .gallery-card:nth-child(2), .gallery-card:nth-child(3) { margin-top: 0; }
  .feature-grid, .route-grid, .index-grid, .chapter-list, .analysis-grid { grid-template-columns: 1fr; }
  .index-card, .index-card:nth-child(4n), .index-card:nth-child(3n) { border-right: 0; border-bottom: 1px solid var(--ink); }.index-card:last-child { border-bottom: 0; }
  .section { margin-bottom: 66px; }
  .section-head { display: block; }
  .section-head p { margin-top: 10px; }
  .footer-grid { width: min(100% - 28px, 1180px); grid-template-columns: 1fr; gap: 18px; }
  .footer-bottom { width: min(100% - 28px, 1180px); }
}