:root {
  --ink: #172c28;
  --forest: #173f35;
  --forest-2: #285c4b;
  --paper: #f3ead8;
  --paper-light: #fbf7ed;
  --cinnabar: #a64932;
  --lake: #397a7e;
  --mustard: #c08b38;
  --line: rgba(23, 44, 40, .18);
  --shadow: 0 20px 60px rgba(28, 44, 39, .14);
  --serif: "FZKai-Z03", "STKaiti", "KaiTi", "Noto Serif SC", serif;
  --sans: "LXGW WenKai", "Microsoft YaHei", "PingFang SC", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 8%, rgba(166,73,50,.08), transparent 23rem),
    radial-gradient(circle at 90% 42%, rgba(57,122,126,.08), transparent 28rem),
    var(--paper-light);
  font-family: var(--sans);
  line-height: 1.75;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: .22;
  z-index: 20;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.13'/%3E%3C/svg%3E");
}
img { max-width: 100%; display: block; }
a { color: inherit; }
button, input { font: inherit; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 100; background: white; padding: .8rem 1rem; }
.skip-link:focus { top: 1rem; }
.section-shell { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 74px;
  padding: 0 clamp(18px, 4vw, 64px);
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: white;
  border-bottom: 1px solid rgba(255,255,255,.17);
  transition: background .35s, color .35s, box-shadow .35s;
}
.site-header.scrolled { background: rgba(251,247,237,.93); color: var(--ink); box-shadow: 0 8px 30px rgba(23,44,40,.1); backdrop-filter: blur(16px); }
.brand { display: flex; align-items: center; gap: .75rem; text-decoration: none; line-height: 1.1; }
.brand-mark { width: 42px; height: 42px; border: 1px solid currentColor; border-radius: 50%; display: inline-grid; place-items: center; font-family: var(--serif); font-size: 1.45rem; }
.brand b, .brand small { display: block; }
.brand b { font-family: var(--serif); letter-spacing: .12em; }
.brand small { opacity: .68; margin-top: .25rem; font-size: .68rem; letter-spacing: .2em; }
nav { display: flex; gap: 1.5rem; align-items: center; }
nav a { text-decoration: none; font-size: .88rem; letter-spacing: .12em; position: relative; }
nav a::after { content: ""; position: absolute; left: 0; bottom: -.4rem; width: 100%; height: 1px; background: currentColor; transform: scaleX(0); transform-origin: right; transition: transform .25s; }
nav a:hover::after, nav a.active::after { transform: scaleX(1); transform-origin: left; }
.print-button, .nav-toggle { border: 1px solid currentColor; background: transparent; color: inherit; border-radius: 999px; padding: .55rem 1rem; cursor: pointer; }
.nav-toggle { display: none; }

.hero { min-height: 100svh; position: relative; display: flex; align-items: flex-end; overflow: hidden; color: white; }
.hero-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; animation: hero-in 1.8s cubic-bezier(.2,.7,.1,1) both; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(13,35,30,.86) 0%, rgba(13,35,30,.48) 44%, rgba(13,35,30,.05) 75%), linear-gradient(0deg, rgba(13,35,30,.72), transparent 45%); }
.hero-copy { position: relative; z-index: 2; width: min(720px, calc(100% - 40px)); margin-left: clamp(20px, 7vw, 110px); margin-bottom: 14vh; animation: copy-in 1.1s .3s both; }
.eyebrow, .section-kicker, .panel-label { text-transform: uppercase; letter-spacing: .24em; font-size: .74rem; font-weight: 700; }
.eyebrow { color: #eed0a2; }
h1, h2, h3 { font-family: var(--serif); line-height: 1.2; margin-top: 0; }
h1 { font-size: clamp(3.5rem, 8vw, 8rem); letter-spacing: .04em; margin-bottom: 1.2rem; text-wrap: balance; }
.hero-lede { max-width: 660px; font-size: clamp(1rem, 1.5vw, 1.25rem); color: rgba(255,255,255,.84); }
.hero-actions { display: flex; gap: .75rem; margin-top: 2rem; }
.button { display: inline-flex; padding: .82rem 1.3rem; border-radius: 999px; text-decoration: none; font-weight: 700; transition: transform .2s, background .2s; }
.button:hover { transform: translateY(-2px); }
.button.primary { color: white; background: var(--cinnabar); }
.button.ghost { border: 1px solid rgba(255,255,255,.6); }
.hero-stats { position: absolute; right: 3vw; bottom: 3vw; z-index: 2; margin: 0; display: grid; grid-template-columns: repeat(4, minmax(100px, 1fr)); background: rgba(244,234,216,.91); color: var(--ink); box-shadow: var(--shadow); }
.hero-stats div { padding: 1rem 1.25rem; min-width: 125px; border-right: 1px solid var(--line); }
.hero-stats div:last-child { border: 0; }
.hero-stats dt { font-size: .68rem; letter-spacing: .15em; opacity: .6; }
.hero-stats dd { margin: .2rem 0 0; font-family: var(--serif); font-size: 1.75rem; }
.hero-stats small { display: block; font-family: var(--sans); font-size: .65rem; opacity: .65; }

.intro, .route, .altitude, .packing, .stay-eat, .checklist, .sources { padding-block: clamp(80px, 10vw, 150px); }
.section-heading { max-width: 780px; margin-bottom: 3rem; }
.section-heading h2 { font-size: clamp(2.4rem, 5vw, 5rem); margin-bottom: 1rem; }
.section-heading p:not(.section-kicker) { color: rgba(23,44,40,.68); }
.section-kicker { color: var(--cinnabar); margin-bottom: .8rem; }
.section-heading.light { color: white; }
.section-heading.light p { color: rgba(255,255,255,.68); }
.principles { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.principles article { padding: 2rem; border-right: 1px solid var(--line); }
.principles article:last-child { border: 0; }
.principles span { color: var(--cinnabar); font-family: var(--serif); font-size: 1.4rem; }
.principles h3 { font-size: 1.55rem; margin: 1rem 0 .5rem; }
.principles p { margin: 0; color: rgba(23,44,40,.7); }
.visual-card { margin: 0; background: var(--paper); padding: clamp(10px, 2vw, 24px); box-shadow: var(--shadow); transform: rotate(-.35deg); }
.visual-card img { width: 100%; }
.visual-card figcaption { padding: .8rem .35rem .15rem; font-size: .8rem; color: rgba(23,44,40,.62); letter-spacing: .06em; }

.days, .booking, .safety { background: var(--forest); color: white; padding-block: clamp(80px, 9vw, 130px); }
.day-list { display: grid; gap: 1px; background: rgba(255,255,255,.16); }
.day-card { display: grid; grid-template-columns: 170px 1fr; background: var(--forest); min-height: 500px; }
.day-index { padding: 2.3rem; border-right: 1px solid rgba(255,255,255,.15); display: flex; flex-direction: column; justify-content: space-between; }
.day-index b { font-family: var(--serif); color: #f0cf9d; font-size: 4.6rem; font-weight: 400; }
.day-index span { font-size: .8rem; letter-spacing: .16em; opacity: .65; }
.day-body { padding: clamp(2rem, 5vw, 5rem); display: grid; grid-template-columns: 1.2fr .8fr; gap: 1rem 4rem; }
.day-theme { grid-column: 1 / -1; color: #f0cf9d; letter-spacing: .16em; font-size: .78rem; }
.day-body h3 { grid-column: 1 / -1; font-size: clamp(2rem, 4vw, 4rem); margin-bottom: .4rem; }
.drive-line { grid-column: 1 / -1; color: rgba(255,255,255,.68); border-bottom: 1px solid rgba(255,255,255,.16); padding-bottom: 1.4rem; }
.time-rail { margin: 1rem 0 0; padding: 0; list-style: none; }
.time-rail li { display: grid; grid-template-columns: 115px 1fr; gap: 1rem; padding: .8rem 0; border-bottom: 1px solid rgba(255,255,255,.11); }
.time-rail time { color: #f0cf9d; font-weight: 700; }
.day-note { align-self: end; background: var(--paper); color: var(--ink); padding: 1.4rem; border-left: 5px solid var(--lake); }
.day-note b { font-family: var(--serif); font-size: 1.4rem; }
.day-note p { margin: .5rem 0 0; }
.day-note.danger { border-left-color: var(--cinnabar); }

.altitude .visual-card { transform: rotate(.25deg); }
.booking-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: rgba(255,255,255,.15); }
.booking-card { background: var(--forest); padding: 2rem; min-height: 300px; }
.booking-card h3 { margin-top: 1.2rem; font-size: 1.8rem; }
.booking-card p { color: rgba(255,255,255,.7); }
.booking-card a { display: inline-block; margin-top: 1rem; color: #f0cf9d; }
.status { display: inline-block; border: 1px solid currentColor; border-radius: 999px; padding: .3rem .65rem; font-size: .68rem; letter-spacing: .1em; }
.status.verified { color: #b9dfc6; }
.status.recheck { color: #f2c67f; }
.split-panel { display: grid; grid-template-columns: 1fr 1fr; box-shadow: var(--shadow); }
.split-panel article { padding: clamp(2rem, 5vw, 4rem); background: var(--paper); }
.split-panel article + article { background: var(--paper-light); border-left: 1px solid var(--line); }
.split-panel h3 { font-size: clamp(1.8rem, 3vw, 3rem); }
.split-panel li { margin-block: .7rem; }
.panel-label { color: var(--cinnabar); }

.safety-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: rgba(255,255,255,.15); }
.safety-grid article { background: var(--forest); padding: 2rem; }
.safety-grid b { color: #f0cf9d; font-family: var(--serif); font-size: 2.2rem; }
.safety-grid h3 { margin: 1.2rem 0 .5rem; }
.safety-grid p { color: rgba(255,255,255,.66); }
.checklist-box { background: var(--paper); box-shadow: var(--shadow); padding: clamp(1.5rem, 4vw, 3rem); display: grid; grid-template-columns: 1fr 1fr; gap: 0 2rem; }
.checklist-box label { display: flex; gap: 1rem; align-items: flex-start; padding: 1rem 0; border-bottom: 1px solid var(--line); cursor: pointer; }
.checklist-box input { width: 1.2rem; height: 1.2rem; margin-top: .25rem; accent-color: var(--cinnabar); }
.checklist-box input:checked + span { text-decoration: line-through; opacity: .55; }
.check-progress { grid-column: 1 / -1; display: grid; grid-template-columns: 1fr auto; gap: 1rem; align-items: center; padding-top: 2rem; }
.check-progress::before { content: ""; grid-column: 1; height: 8px; border-radius: 10px; background: rgba(23,44,40,.12); }
.check-progress span { grid-column: 1; grid-row: 1; width: 0; height: 8px; border-radius: 10px; background: var(--cinnabar); transition: width .3s; }
.check-progress b { grid-column: 2; grid-row: 1; }
.source-list { border-top: 1px solid var(--line); }
.source-list a { display: grid; grid-template-columns: 60px 1fr; padding: 1rem 0; text-decoration: none; border-bottom: 1px solid var(--line); transition: color .2s, padding-left .2s; }
.source-list a:hover { color: var(--cinnabar); padding-left: .5rem; }
.source-list span { color: var(--cinnabar); }
.source-note { margin-top: 2rem; font-size: .84rem; color: rgba(23,44,40,.6); }
footer { min-height: 200px; padding: 3rem clamp(20px, 7vw, 110px); background: #102d26; color: white; display: flex; justify-content: space-between; align-items: center; }
footer > div { display: flex; gap: 1rem; align-items: center; }
footer p { margin: 0; }
footer a { color: #f0cf9d; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .75s ease, transform .75s ease; }
.reveal.visible { opacity: 1; transform: none; }
@keyframes hero-in { from { transform: scale(1.08); filter: saturate(.7); } to { transform: scale(1); filter: saturate(1); } }
@keyframes copy-in { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: none; } }

@media (max-width: 980px) {
  .hero-stats { left: 20px; right: 20px; bottom: 20px; grid-template-columns: repeat(4, 1fr); }
  .hero-copy { margin-bottom: 180px; }
  .booking-grid, .safety-grid { grid-template-columns: 1fr 1fr; }
  .day-body { grid-template-columns: 1fr; }
  .time-rail, .day-note { grid-column: 1; }
}
@media (max-width: 760px) {
  .site-header { height: 64px; }
  .nav-toggle { display: block; }
  nav { position: absolute; top: 64px; left: 0; right: 0; display: none; padding: 1.2rem 20px 1.5rem; background: var(--paper-light); color: var(--ink); box-shadow: var(--shadow); flex-direction: column; align-items: stretch; }
  nav.open { display: flex; }
  nav a, nav button { padding: .55rem 0; }
  .brand small { display: none; }
  .hero { min-height: 920px; }
  .hero-image { object-position: 58% center; }
  .hero-shade { background: linear-gradient(0deg, rgba(13,35,30,.91) 0%, rgba(13,35,30,.2) 78%); }
  .hero-copy { margin: 0 20px 260px; width: auto; }
  h1 { font-size: clamp(3.2rem, 16vw, 5rem); }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .hero-stats div:nth-child(2) { border-right: 0; }
  .principles, .split-panel, .checklist-box { grid-template-columns: 1fr; }
  .principles article { border-right: 0; border-bottom: 1px solid var(--line); padding-inline: 0; }
  .split-panel article + article { border-left: 0; border-top: 1px solid var(--line); }
  .day-card { grid-template-columns: 1fr; }
  .day-index { min-height: 130px; padding: 1.5rem; flex-direction: row; align-items: center; border-right: 0; border-bottom: 1px solid rgba(255,255,255,.15); }
  .day-index b { font-size: 3.5rem; }
  .day-body { padding: 1.5rem; }
  .check-progress { grid-column: 1; }
}
@media (max-width: 520px) {
  .section-shell { width: min(100% - 28px, 1180px); }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .hero-stats div { min-width: 0; padding: .8rem; }
  .hero-stats dd { font-size: 1.35rem; }
  .booking-grid, .safety-grid { grid-template-columns: 1fr; }
  .time-rail li { grid-template-columns: 1fr; gap: .15rem; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; scroll-behavior: auto !important; transition-duration: .01ms !important; }
}
@media print {
  .site-header, .hero-actions, .checklist, footer { display: none !important; }
  body { background: white; color: black; }
  body::before { display: none; }
  .hero { min-height: 480px; break-after: page; }
  .hero-stats { position: absolute; }
  .reveal { opacity: 1; transform: none; }
  .days, .booking, .safety { color: black; background: white; }
  .day-card, .booking-card, .safety-grid article { color: black; background: white; border: 1px solid #bbb; break-inside: avoid; }
  .day-note { border: 1px solid #bbb; }
  a { text-decoration: none; }
}