@import url("assets/fonts/lxgw-wenkai-lite/lxgwwenkailite-regular.css");

:root {
  --ink: #182522;
  --muted: #596661;
  --paper: #f6f1e7;
  --paper-deep: #e8dfcf;
  --white: #fffdf8;
  --jade: #123d38;
  --accent: #ad4a32;
  --accent-soft: #dfbd7d;
  --line: rgba(24, 37, 34, .14);
  --shell: min(1240px, calc(100% - 88px));
  --font-xingkai: "Kaiti SC", "STKaiti", "KaiTi", "LXGW WenKai Lite", serif;
  --font-song: "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", Georgia, serif;
  --font-modern: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
  --serif: var(--font-xingkai);
  --sans: var(--font-xingkai);
}

html[data-font="song"] { --serif: var(--font-song); --sans: var(--font-song); }
html[data-font="modern"] { --serif: var(--font-modern); --sans: var(--font-modern); }

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); line-height: 1.75; -webkit-font-smoothing: antialiased; }
body.large-text { font-size: 19px; }
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
button { color: inherit; font: inherit; }
img { display: block; width: 100%; }
svg { display: block; }
.shell { width: var(--shell); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; }
.skip-link { position: fixed; z-index: 100; left: 14px; top: -60px; padding: 10px 16px; color: #fff; background: var(--accent); }
.skip-link:focus { top: 14px; }

.sub-header { position: absolute; z-index: 20; top: 0; left: 0; right: 0; height: 86px; color: #fff; border-bottom: 1px solid rgba(255,255,255,.15); transition: color .25s, background .25s, height .25s, box-shadow .25s; }
.sub-header.fixed { position: fixed; height: 70px; color: var(--ink); background: rgba(249,246,238,.95); box-shadow: 0 8px 28px rgba(18,38,34,.1); backdrop-filter: blur(18px); }
.header-inner { display: flex; height: 100%; align-items: center; justify-content: space-between; }
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-mark { display: inline-flex; width: 44px; height: 44px; align-items: center; justify-content: center; color: #f8edd9; border-radius: 2px; background: var(--accent); font-family: var(--serif); font-size: 25px; }
.brand-copy { display: flex; flex-direction: column; line-height: 1.1; }
.brand-copy strong { font-family: var(--serif); font-size: 20px; letter-spacing: .15em; }
.brand-copy small { margin-top: 6px; font-size: 8px; letter-spacing: .22em; opacity: .62; }
.sub-nav { display: flex; height: 100%; align-items: center; gap: clamp(18px, 2.6vw, 38px); }
.sub-nav a { position: relative; display: inline-flex; height: 100%; align-items: center; font-size: 13px; letter-spacing: .1em; }
.sub-nav a::after { content: ""; position: absolute; left: 50%; bottom: 17px; width: 0; height: 2px; background: var(--accent-soft); transform: translateX(-50%); transition: width .2s; }
.sub-nav a:hover::after, .sub-nav a.active::after { width: 22px; }
.sub-header.fixed .sub-nav a::after { bottom: 11px; background: var(--accent); }
.header-tools { display: flex; gap: 10px; align-items: center; }
.home-link, .font-toggle, .language-toggle, .font-picker { display: inline-flex; min-height: 34px; padding: 0 13px; align-items: center; justify-content: center; border: 1px solid rgba(255,255,255,.32); background: transparent; font-size: 11px; letter-spacing: .08em; cursor: pointer; }
.sub-header.fixed .home-link, .sub-header.fixed .font-toggle, .sub-header.fixed .language-toggle, .sub-header.fixed .font-picker { border-color: var(--line); }
.home-link:hover, .font-toggle:hover, .language-toggle:hover, .font-picker:hover { color: #fff; border-color: var(--accent); background: var(--accent); }
.font-picker { position: relative; padding-inline: 10px; }
.font-picker::after { content: ""; position: absolute; right: 8px; width: 0; height: 0; border: 3px solid transparent; border-top-color: currentColor; transform: translateY(2px); pointer-events: none; }
.font-style-select { width: 56px; border: 0; padding: 0 12px 0 0; color: inherit; background: transparent; font: inherit; letter-spacing: .05em; appearance: none; cursor: pointer; }
.font-style-select:focus-visible { outline: 1px solid var(--accent-soft); outline-offset: 4px; }
.font-style-select option { color: var(--ink); background: var(--white); }
.language-toggle { gap: 5px; padding-inline: 10px; }
.language-toggle i { font-style: normal; opacity: .3; }
.language-toggle span { opacity: .4; }
.language-toggle span.active { color: var(--accent-soft); font-weight: 700; opacity: 1; }
.sub-header.fixed .language-toggle span.active { color: var(--accent); }
.language-toggle:hover span.active { color: #fff; }
.menu-toggle { display: none; width: 42px; height: 42px; padding: 10px; border: 0; background: transparent; cursor: pointer; }
.menu-toggle span { display: block; height: 1px; margin: 6px 0; background: currentColor; transition: transform .2s, opacity .2s; }

html[lang="en"] .brand-copy strong { font-family: var(--serif); font-size: 16px; letter-spacing: .03em; }
html[lang="en"] .sub-nav a { font-size: 12px; letter-spacing: .035em; }
html[lang="en"] .sub-hero h1 { max-width: 1080px; font-family: var(--serif); font-size: clamp(48px, 6.5vw, 88px); letter-spacing: .02em; }
html[lang="en"] .intro-title, html[lang="en"] .section-heading h2, html[lang="en"] .feature-copy h2 { font-family: var(--serif); letter-spacing: .025em; }
html[lang="en"] .intro-title { font-size: clamp(36px, 4.4vw, 58px); }
html[lang="en"] .highlight-card h3, html[lang="en"] .stop h3, html[lang="en"] .related-card strong { font-family: var(--serif); letter-spacing: .02em; }

.sub-hero { position: relative; display: flex; min-height: 620px; overflow: hidden; align-items: flex-end; color: #fff; background: var(--jade); }
.sub-hero-media, .sub-hero-overlay, .sub-hero-pattern { position: absolute; inset: 0; }
.sub-hero-media img { height: 100%; object-fit: cover; object-position: center; }
.sub-hero-overlay { background: linear-gradient(90deg, rgba(6,28,24,.9), rgba(8,29,26,.48) 52%, rgba(5,19,17,.16)), linear-gradient(0deg, rgba(5,21,18,.76), transparent 58%); }
.sub-hero-pattern { opacity: .18; background-image: linear-gradient(90deg, transparent 49.8%, rgba(255,255,255,.16) 50%, transparent 50.2%); background-size: 92px 100%; mask-image: linear-gradient(90deg, #000, transparent 62%); }
.sub-hero-inner { position: relative; z-index: 2; padding: 160px 0 72px; }
.breadcrumb { display: flex; margin-bottom: 34px; align-items: center; gap: 10px; color: rgba(255,255,255,.58); font-size: 11px; letter-spacing: .1em; }
.breadcrumb a:hover { color: var(--accent-soft); }
.breadcrumb i { width: 18px; height: 1px; background: rgba(255,255,255,.35); }
.sub-kicker { display: block; margin-bottom: 16px; color: var(--accent-soft); font-size: 11px; font-weight: 700; letter-spacing: .32em; }
.sub-hero h1 { max-width: 900px; margin: 0; font-family: var(--serif); font-size: clamp(58px, 7.4vw, 104px); font-weight: 500; line-height: 1.08; letter-spacing: .08em; }
.sub-hero h1 em { color: #f1d9a8; font-style: normal; }
.sub-hero-lede { max-width: 760px; margin: 28px 0 0; padding-left: 20px; color: rgba(255,255,255,.72); border-left: 1px solid var(--accent-soft); font-family: var(--serif); font-size: 18px; letter-spacing: .07em; }
.hero-number { position: absolute; z-index: 2; right: 4%; bottom: 35px; color: rgba(255,255,255,.16); font-family: var(--serif); font-size: 130px; line-height: 1; }

.quick-facts { position: relative; z-index: 4; margin-top: -1px; color: #fff; background: var(--jade); }
.fact-list { display: grid; grid-template-columns: repeat(3, 1fr); }
.fact-item { min-height: 104px; padding: 24px 30px; border-right: 1px solid rgba(255,255,255,.12); }
.fact-item:last-child { border-right: 0; }
.fact-item small { display: block; color: var(--accent-soft); font-size: 9px; letter-spacing: .2em; }
.fact-item strong { display: block; margin-top: 7px; font-family: var(--serif); font-size: 20px; font-weight: 500; letter-spacing: .08em; }

.detail-section { padding: 112px 0; }
.detail-section.alt { background: #ebe2d3; }
.detail-section.dark { color: #fff; background: #102c28; }
.intro-grid { display: grid; grid-template-columns: .86fr 1.14fr; gap: 10vw; align-items: start; }
.section-label { display: flex; align-items: center; gap: 12px; color: var(--accent); font-size: 10px; font-weight: 700; letter-spacing: .25em; }
.section-label::before { content: ""; width: 34px; height: 1px; background: currentColor; }
.intro-title { margin: 25px 0 0; font-family: var(--serif); font-size: clamp(40px, 4.8vw, 66px); font-weight: 500; line-height: 1.3; letter-spacing: .07em; }
.intro-title em { color: var(--accent); font-style: normal; }
.prose { color: var(--muted); font-size: 17px; line-height: 2.05; }
.prose p { margin: 0 0 22px; }
.prose p:first-child::first-letter { float: left; margin: 10px 12px 0 0; color: var(--accent); font-family: var(--serif); font-size: 58px; line-height: .8; }
.pull-quote { margin-top: 34px; padding: 24px 28px; color: var(--jade); border-left: 3px solid var(--accent); background: rgba(255,255,255,.55); font-family: var(--serif); font-size: 20px; letter-spacing: .06em; }

.section-heading { display: flex; margin-bottom: 58px; align-items: flex-end; justify-content: space-between; gap: 50px; }
.section-heading h2 { margin: 0; font-family: var(--serif); font-size: clamp(38px, 4.5vw, 60px); font-weight: 500; letter-spacing: .08em; }
.section-heading p { max-width: 530px; margin: 0; color: var(--muted); font-size: 14px; line-height: 1.9; }
.dark .section-heading p { color: rgba(255,255,255,.55); }
.dark .section-label { color: var(--accent-soft); }
.highlight-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.highlight-card { position: relative; min-height: 300px; overflow: hidden; padding: 36px 30px 32px; background: rgba(255,255,255,.58); border-top: 3px solid var(--accent); transition: transform .25s, box-shadow .25s, background .25s; }
.highlight-card:hover { transform: translateY(-6px); box-shadow: 0 22px 55px rgba(28,46,40,.12); background: #fff; }
.highlight-card > span { color: var(--accent); font-family: var(--serif); font-size: 12px; }
.highlight-card h3 { margin: 45px 0 14px; font-family: var(--serif); font-size: 25px; font-weight: 600; letter-spacing: .07em; }
.highlight-card p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.9; }
.highlight-card i { position: absolute; right: -24px; bottom: -42px; color: rgba(173,74,50,.06); font-family: var(--serif); font-size: 150px; font-style: normal; }

.feature-band { display: grid; grid-template-columns: 1fr 1fr; min-height: 520px; }
.feature-image { position: relative; min-height: 480px; overflow: hidden; }
.feature-image img { height: 100%; object-fit: cover; }
.feature-image::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(7,29,25,.35), transparent 50%); }
.feature-copy { display: flex; padding: 70px; flex-direction: column; justify-content: center; color: #fff; background: var(--accent); }
.feature-copy small { color: rgba(255,255,255,.58); font-size: 10px; letter-spacing: .24em; }
.feature-copy h2 { margin: 20px 0; font-family: var(--serif); font-size: clamp(34px, 4vw, 54px); font-weight: 500; line-height: 1.35; letter-spacing: .08em; }
.feature-copy p { margin: 0; color: rgba(255,255,255,.72); line-height: 2; }

.itinerary { position: relative; }
.itinerary::before { content: ""; position: absolute; left: 73px; top: 25px; bottom: 25px; width: 1px; background: rgba(255,255,255,.18); }
.stop { position: relative; display: grid; grid-template-columns: 104px 1fr auto; gap: 30px; min-height: 130px; padding: 24px 0; align-items: center; border-bottom: 1px solid rgba(255,255,255,.1); }
.stop-time { color: var(--accent-soft); font-family: var(--serif); font-size: 14px; }
.stop-dot { position: absolute; left: 68px; top: 58px; width: 11px; height: 11px; border: 3px solid #102c28; border-radius: 50%; background: var(--accent-soft); box-shadow: 0 0 0 1px var(--accent-soft); }
.stop h3 { margin: 0 0 7px; font-family: var(--serif); font-size: 22px; font-weight: 500; letter-spacing: .08em; }
.stop p { margin: 0; color: rgba(255,255,255,.5); font-size: 13px; }
.stop-tag { padding: 5px 10px; color: var(--accent-soft); border: 1px solid rgba(223,189,125,.3); font-size: 9px; letter-spacing: .12em; }

.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.related-card { position: relative; display: flex; min-height: 210px; overflow: hidden; padding: 28px; flex-direction: column; justify-content: flex-end; color: #fff; background: var(--jade); }
.related-card img { position: absolute; inset: 0; height: 100%; object-fit: cover; transition: transform .5s; }
.related-card::after { content: ""; position: absolute; inset: 0; background: linear-gradient(0deg, rgba(5,23,20,.88), rgba(5,23,20,.08)); }
.related-card:hover img { transform: scale(1.05); }
.related-card small, .related-card strong, .related-card span { position: relative; z-index: 1; }
.related-card small { color: var(--accent-soft); font-size: 9px; letter-spacing: .18em; }
.related-card strong { margin-top: 6px; font-family: var(--serif); font-size: 23px; font-weight: 500; letter-spacing: .08em; }
.related-card span { position: absolute; right: 24px; bottom: 27px; font-size: 20px; }

.source-list { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.source-group { padding: 30px; background: rgba(255,255,255,.62); }
.source-group h3 { margin: 0 0 20px; padding-bottom: 14px; border-bottom: 1px solid var(--line); font-family: var(--serif); font-size: 22px; }
.source-group a { display: block; padding: 8px 0; color: var(--muted); font-size: 13px; }
.source-group a:hover { color: var(--accent); }
.notice { margin-top: 24px; padding: 20px 24px; color: #704237; border: 1px solid rgba(173,74,50,.18); background: rgba(173,74,50,.06); font-size: 13px; }

.sub-footer { color: rgba(255,255,255,.58); background: #0a211e; }
.footer-main { display: flex; min-height: 150px; align-items: center; justify-content: space-between; gap: 40px; }
.footer-copy strong { display: block; color: #fff; font-family: var(--serif); font-size: 23px; letter-spacing: .12em; }
.footer-copy span { display: block; margin-top: 7px; font-size: 9px; letter-spacing: .16em; }
.footer-nav { display: flex; flex-wrap: wrap; gap: 24px; font-size: 12px; }
.footer-nav a:hover { color: var(--accent-soft); }
.footer-bottom { padding: 17px 0; border-top: 1px solid rgba(255,255,255,.08); font-size: 10px; }

.back-top { position: fixed; z-index: 18; right: 25px; bottom: 25px; display: flex; width: 44px; height: 44px; align-items: center; justify-content: center; color: #fff; border: 0; background: var(--jade); cursor: pointer; opacity: 0; pointer-events: none; transform: translateY(10px); transition: .2s; }
.back-top.visible { opacity: 1; pointer-events: auto; transform: none; }
.back-top:hover { background: var(--accent); }

.reveal { opacity: 1; transform: none; }
.js .reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s, transform .7s; }
.js .reveal.visible { opacity: 1; transform: none; }

@media (max-width: 980px) {
  :root { --shell: min(100% - 44px, 860px); }
  .sub-nav { gap: 18px; }
  .header-tools .font-toggle { display: none; }
  .intro-grid { gap: 6vw; }
  .highlight-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-copy { padding: 50px; }
}

@media (max-width: 760px) {
  :root { --shell: calc(100% - 32px); }
  .sub-header, .sub-header.fixed { height: 68px; }
  .menu-toggle { position: relative; z-index: 3; display: block; }
  .menu-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-toggle.active span:nth-child(2) { opacity: 0; }
  .menu-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .sub-nav { position: fixed; inset: 0; padding: 95px 12vw 45px; flex-direction: column; align-items: stretch; color: #fff; background: rgba(8,32,28,.98); opacity: 0; pointer-events: none; transform: translateY(-14px); transition: .25s; }
  .sub-nav.open { opacity: 1; pointer-events: auto; transform: none; }
  .sub-nav a { height: auto; padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,.12); font-family: var(--serif); font-size: 21px; }
  .sub-nav a::after { display: none; }
  .header-tools .home-link { display: none; }
  .sub-header.fixed .menu-toggle.active { color: #fff; }
  .sub-hero { min-height: 590px; }
  .sub-hero-inner { padding: 130px 0 60px; }
  .sub-hero h1 { font-size: clamp(48px, 14vw, 76px); }
  .sub-hero-lede { font-size: 15px; }
  .hero-number { font-size: 90px; }
  .fact-list { grid-template-columns: 1fr; }
  .fact-item { min-height: auto; padding: 17px 0; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.12); }
  .fact-item:last-child { border-bottom: 0; }
  .detail-section { padding: 78px 0; }
  .intro-grid { grid-template-columns: 1fr; gap: 35px; }
  .prose { font-size: 15px; }
  .section-heading { align-items: flex-start; flex-direction: column; gap: 18px; margin-bottom: 42px; }
  .highlight-grid { grid-template-columns: 1fr; }
  .highlight-card { min-height: 250px; }
  .feature-band { grid-template-columns: 1fr; }
  .feature-image { min-height: 340px; }
  .feature-copy { padding: 42px 28px; }
  .stop { grid-template-columns: 80px 1fr; gap: 18px; }
  .stop-tag { display: none; }
  .itinerary::before { left: 55px; }
  .stop-dot { left: 50px; }
  .related-grid { grid-template-columns: 1fr; }
  .related-card { min-height: 250px; }
  .source-list { grid-template-columns: 1fr; }
  .footer-main { padding: 50px 0; align-items: flex-start; flex-direction: column; }
}

@media (max-width: 480px) {
  .brand-copy { display: none; }
  .brand-copy small { display: none; }
  .sub-hero h1 { font-size: 46px; }
  .breadcrumb { margin-bottom: 25px; }
  .intro-title { font-size: 37px; }
  .feature-image { min-height: 290px; }
  .stop { grid-template-columns: 64px 1fr; }
  .itinerary::before { left: 43px; }
  .stop-dot { left: 38px; }
}

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