:root {
  --navy: #10233b;
  --gold: #0084cc;
  --gold-light: #78cef7;
  --ivory: #eef8fd;
  --paper: #fbfdff;
  --ink: #182434;
  --muted: #6e747b;
  --line: rgba(16,35,59,.14);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.site-header { position: absolute; z-index: 10; top: 0; left: 0; right: 0; color: #fff; border-bottom: 1px solid rgba(255,255,255,.22); }
.nav-shell { width: min(1240px, calc(100% - 64px)); height: 90px; margin: auto; display: flex; align-items: center; justify-content: space-between; }
.brand, .footer-brand { display: inline-flex; align-items: center; }
.brand img, .footer-brand img { height: auto; object-fit: contain; border-radius: 14px; box-shadow: 0 8px 24px rgba(4, 70, 108, .18); }
.brand img { width: 104px; }
.footer-brand img { width: 132px; }
nav { display: flex; align-items: center; gap: 34px; font-size: 14px; }
nav > a { opacity: .88; transition: opacity .2s ease; }
nav > a:hover { opacity: 1; }
.nav-cta { padding: 11px 20px; border: 1px solid rgba(255,255,255,.55); border-radius: 999px; }

.hero { position: relative; min-height: 820px; display: flex; align-items: center; color: #fff; overflow: hidden; background: #102d42; }
.hero-image { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero-shade { position: absolute; inset: 0; background: linear-gradient(90deg, rgba(7,29,50,.90) 0%, rgba(0,76,119,.58) 45%, rgba(0,132,204,.12) 78%), linear-gradient(0deg, rgba(8,27,44,.48), transparent 48%); }
.hero-copy { position: relative; z-index: 2; width: min(1240px, calc(100% - 64px)); margin: 68px auto 0; }
.eyebrow { margin: 0 0 18px; font: 700 11px/1.2 Arial, sans-serif; letter-spacing: .32em; }
.eyebrow.gold { color: var(--gold); }
.hero h1 { max-width: 760px; margin: 0; font-family: "Songti SC", "STSong", serif; font-size: clamp(74px, 9vw, 128px); font-weight: 500; line-height: .92; letter-spacing: -.055em; }
.hero h1 em { color: var(--gold-light); font-style: normal; }
.hero-lead { max-width: 520px; margin: 28px 0 0; font-family: "Songti SC", "STSong", serif; font-size: 19px; line-height: 1.8; letter-spacing: .08em; }
.hero-actions { display: flex; gap: 14px; margin-top: 38px; }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 18px; min-height: 52px; padding: 0 25px; border-radius: 2px; font-size: 14px; font-weight: 700; letter-spacing: .05em; }
.button.primary { color: #fff; background: var(--gold); box-shadow: 0 12px 32px rgba(0,132,204,.28); }
.button.ghost { border: 1px solid rgba(255,255,255,.6); background: rgba(255,255,255,.06); backdrop-filter: blur(6px); }
.hero-note { position: absolute; z-index: 2; right: 0; bottom: 0; min-width: 430px; display: flex; align-items: center; gap: 20px; padding: 27px 62px 27px 35px; color: var(--navy); background: var(--ivory); }
.hero-note > span { color: var(--gold); font: 300 36px/1 Georgia, serif; }
.hero-note div { display: flex; flex-direction: column; gap: 5px; }
.hero-note b { font-family: "Songti SC", "STSong", serif; font-size: 18px; }
.hero-note small { color: var(--muted); }
.scroll-hint { position: absolute; z-index: 2; bottom: 36px; left: 32px; display: flex; align-items: center; gap: 10px; font-size: 10px; letter-spacing: .16em; writing-mode: vertical-rl; opacity: .8; }
.scroll-hint span { width: 1px; height: 34px; background: #fff; }

.section-shell { width: min(1180px, calc(100% - 64px)); margin: 0 auto; }
.intro { padding: 132px 0 124px; }
.section-heading { display: grid; grid-template-columns: 1.2fr .8fr; align-items: end; gap: 80px; margin-bottom: 55px; }
.section-heading h2, .season-head h2, .why-copy h2, .contact h2 { margin: 0; font-family: "Songti SC", "STSong", serif; font-size: clamp(40px, 5vw, 68px); font-weight: 500; line-height: 1.1; letter-spacing: -.045em; }
.section-heading > p { margin: 0 0 6px; color: var(--muted); font-size: 15px; line-height: 1.95; }
.collection-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); align-items: stretch; gap: 22px; }
.collection-card { position: relative; min-height: 0; display: flex; flex-direction: column; overflow: hidden; color: var(--ink); border: 1px solid #dbe8ef; border-radius: 22px; background: #fff; box-shadow: 0 14px 38px rgba(20,54,75,.1); transition: transform .25s ease, box-shadow .25s ease; }
.collection-card:hover { transform: translateY(-5px); box-shadow: 0 21px 46px rgba(20,54,75,.16); }
.collection-card img { position: static; width: 100%; height: 240px; object-fit: cover; object-position: center; background: #102d42; }
.collection-card:hover img { transform: none; }
.collection-card::after { display: none; }
.collection-card.featured { min-height: 0; margin-top: 0; }
.collection-tag { position: absolute; z-index: 2; top: 26px; left: 26px; padding: 8px 12px; color: #fff; background: var(--gold); box-shadow: 0 8px 22px rgba(0,132,204,.24); font: 700 9px/1 Arial, sans-serif; letter-spacing: .14em; }
.collection-copy { position: static; z-index: 2; height: 100%; display: flex; flex-direction: column; padding: 28px; }
.collection-copy small { color: var(--gold); opacity: 1; letter-spacing: .08em; }
.collection-copy h3 { margin: 10px 0 9px; font-family: "Songti SC", "STSong", serif; font-size: 36px; font-weight: 500; }
.collection-copy p { margin: 0 0 24px; color: var(--muted); font-size: 14px; line-height: 1.75; opacity: 1; }
.text-link { display: flex; justify-content: space-between; margin-top: auto; padding-top: 16px; color: var(--gold); border-top: 1px solid var(--line); font-size: 13px; }
.text-link b { font-size: 18px; }

.season-section { padding: 115px 0 120px; color: #fff; background: var(--navy); }
.season-head { display: flex; justify-content: space-between; align-items: end; margin-bottom: 48px; }
.season-head h2 { max-width: 620px; }
.season-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid rgba(255,255,255,.2); border-left: 1px solid rgba(255,255,255,.2); }
.season-card { position: relative; min-height: 340px; display: flex; flex-direction: column; justify-content: space-between; padding: 24px; overflow: hidden; border-right: 1px solid rgba(255,255,255,.2); border-bottom: 1px solid rgba(255,255,255,.2); background-color: #102d42; background-position: center; background-size: cover; background-repeat: no-repeat; isolation: isolate; transition: transform .25s ease; }
.season-card:hover { transform: translateY(-6px); }
.season-card::before { content: ""; position: absolute; inset: 0; z-index: -1; background: linear-gradient(180deg, rgba(7,22,38,.2), rgba(7,20,35,.82)); }
.season-card.autumn { background-image: url('assets/generated/autumn-khingan-v2.jpg'); }
.season-card.beijing { background-image: url('beijing-2026/assets/forbidden-city.jpg'); }
.season-card.summer { background-image: url('assets/generated/arctic-mohe-v2.jpg'); }
.season-card.spring { background-image: url('assets/generated/tumen-river-v2.jpg'); }
.season-card > span { font: 400 12px/1 Arial, sans-serif; opacity: .75; }
.season-card small { color: var(--gold-light); font: 700 9px/1 Arial, sans-serif; letter-spacing: .25em; }
.season-card h3 { margin: 10px 0; font-family: "Songti SC", "STSong", serif; font-size: 30px; font-weight: 500; }
.season-card p { margin: 0; font-size: 12px; line-height: 1.7; opacity: .75; }
.season-card > b { align-self: flex-end; font-size: 22px; }

.why { display: grid; grid-template-columns: .9fr 1.1fr; gap: 95px; align-items: center; padding-top: 130px; padding-bottom: 130px; }
.why-photo { position: relative; min-height: 670px; }
.why-photo img { width: 100%; height: 670px; object-fit: cover; object-position: center; background: #eef8fd; }
.why-photo > span { position: absolute; left: -22px; bottom: 25px; color: #fff; font: 700 58px/.86 Arial, sans-serif; letter-spacing: -.04em; }
.why-copy h2 { margin-bottom: 30px; }
.why-intro { margin: 0 0 42px; color: var(--muted); font-size: 15px; line-height: 2; }
.values { display: grid; grid-template-columns: 1fr 1fr; gap: 32px 38px; }
.values div { padding-top: 18px; border-top: 1px solid var(--line); }
.values span { color: var(--gold); font: 600 10px/1 Arial, sans-serif; }
.values h3 { margin: 9px 0 8px; font-family: "Songti SC", "STSong", serif; font-size: 21px; font-weight: 600; }
.values p { margin: 0; color: var(--muted); font-size: 12px; line-height: 1.7; }

.gallery { display: grid; grid-template-columns: 1.2fr .8fr 1.1fr .8fr 1.2fr; height: 330px; overflow: hidden; }
.gallery > img { width: 100%; height: 100%; object-fit: cover; object-position: center; background: #102d42; }
.gallery-quote { display: flex; align-items: center; justify-content: center; flex-direction: column; padding: 30px; color: #fff; text-align: center; background: linear-gradient(145deg, #0084cc, #006da9); }
.gallery-quote img { width: 126px; height: auto; margin-bottom: 16px; border-radius: 14px; object-fit: contain; box-shadow: 0 10px 28px rgba(0, 57, 91, .24); }
.gallery-quote p { margin: 0; font-family: "Songti SC", "STSong", serif; font-size: 19px; line-height: 1.75; }
.gallery-quote em { font-style: normal; }

.contact { position: relative; min-height: 610px; display: flex; align-items: center; justify-content: center; color: #fff; text-align: center; overflow: hidden; }
.contact > img, .contact-shade { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; background: #102d42; }
.contact-shade { background: linear-gradient(rgba(10,29,47,.65), rgba(10,29,47,.78)); }
.contact-copy { position: relative; z-index: 2; width: min(720px, calc(100% - 48px)); }
.contact h2 { font-size: clamp(52px, 7vw, 88px); }
.contact-copy > p:not(.eyebrow) { margin: 24px auto 32px; max-width: 540px; font-size: 15px; line-height: 1.8; opacity: .82; }
.contact .button { margin: auto; }

.site-footer { min-height: 215px; display: grid; grid-template-columns: 1fr auto; align-content: center; gap: 32px; padding: 50px max(32px, calc((100% - 1180px) / 2)); color: #fff; background: #091a2d; }
.footer-links { display: flex; align-items: center; gap: 30px; font-size: 13px; opacity: .75; }
.site-footer > p { grid-column: 1 / -1; margin: 0; padding-top: 23px; border-top: 1px solid rgba(255,255,255,.14); font-size: 11px; opacity: .5; }

@media (max-width: 900px) {
  .nav-shell { width: min(100% - 34px, 760px); height: 76px; }
  nav > a:not(.nav-cta) { display: none; }
  .hero { min-height: 720px; }
  .hero-copy, .section-shell { width: min(100% - 40px, 760px); }
  .hero-note { min-width: 0; right: 20px; bottom: 20px; padding: 18px 22px; }
  .scroll-hint { display: none; }
  .section-heading { grid-template-columns: 1fr; gap: 22px; }
  .collection-grid { grid-template-columns: 1fr 1fr; }
  .collection-card.featured { grid-column: 1 / -1; min-height: 0; margin-top: 0; }
  .collection-card:not(.featured) { min-height: 0; }
  .collection-card img { height: 280px; }
  .season-grid { grid-template-columns: 1fr 1fr; }
  .why { grid-template-columns: 1fr; gap: 55px; }
  .why-photo, .why-photo img { min-height: 540px; height: 540px; }
  .gallery { grid-template-columns: 1fr 1fr 1fr; height: 280px; }
  .gallery > img:nth-of-type(3), .gallery > img:nth-of-type(4) { display: none; }
}

@media (max-width: 600px) {
  .nav-shell { width: calc(100% - 28px); }
  .brand img { width: 82px; height: auto; border-radius: 11px; }
  .footer-brand img { width: 118px; height: auto; }
  .nav-cta { padding: 9px 13px; font-size: 12px; }
  .hero { min-height: 700px; align-items: flex-start; }
  .hero-image { object-position: center; }
  .hero-copy { width: calc(100% - 40px); margin-top: 170px; }
  .hero h1 { font-size: clamp(62px, 20vw, 86px); line-height: .96; }
  .hero-lead { max-width: 310px; font-size: 15px; line-height: 1.75; }
  .hero-actions { align-items: stretch; flex-direction: column; max-width: 250px; }
  .hero-note { left: 20px; right: 20px; bottom: 20px; }
  .intro { padding: 88px 0 80px; }
  .section-shell { width: calc(100% - 32px); }
  .section-heading h2, .season-head h2, .why-copy h2 { font-size: 40px; }
  .section-heading { margin-bottom: 34px; }
  .collection-grid { grid-template-columns: 1fr; }
  .collection-card.featured { grid-column: auto; min-height: 0; }
  .collection-card:not(.featured) { min-height: 0; }
  .collection-card img { height: 230px; }
  .collection-copy h3 { font-size: 32px; }
  .season-section { padding: 80px 0; }
  .season-head { display: block; }
  .season-grid { grid-template-columns: 1fr; }
  .season-card { min-height: 280px; }
  .why { padding-top: 80px; padding-bottom: 80px; }
  .why-photo, .why-photo img { min-height: 440px; height: 440px; }
  .why-photo > span { left: 13px; font-size: 43px; }
  .values { grid-template-columns: 1fr; gap: 24px; }
  .gallery { grid-template-columns: 1fr 1fr; height: auto; }
  .gallery > img { height: 190px; }
  .gallery-quote { grid-column: 1 / -1; grid-row: 2; min-height: 250px; }
  .contact { min-height: 560px; }
  .contact h2 { font-size: 54px; }
  .site-footer { grid-template-columns: 1fr; padding: 50px 24px; }
  .footer-links { flex-wrap: wrap; }
}