:root {
  --ink: #17201e;
  --muted: #65716e;
  --paper: #ffffff;
  --soft: #f3f5f2;
  --green: #1d6b57;
  --green-dark: #145142;
  --coral: #d86648;
  --line: #dfe5e1;
  --max-width: 1180px;
  --header-height: 72px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: var(--header-height); }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", sans-serif; line-height: 1.7; }
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font: inherit; }
.skip-link { position: fixed; top: -60px; left: 16px; z-index: 200; padding: 10px 16px; color: #fff; background: var(--green); }
.skip-link:focus { top: 12px; }
.site-header { position: fixed; inset: 0 0 auto; z-index: 100; height: var(--header-height); color: #fff; transition: background .25s ease, color .25s ease, box-shadow .25s ease; }
.site-header.scrolled, .site-header.menu-active { color: var(--ink); background: rgba(255,255,255,.96); box-shadow: 0 1px 0 rgba(20,35,31,.1); backdrop-filter: blur(12px); }
.header-inner { width: min(calc(100% - 48px), var(--max-width)); height: 100%; margin: 0 auto; display: flex; align-items: center; gap: 36px; }
.brand { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; }
.brand-mark { width: 36px; height: 36px; display: grid; place-items: center; color: #fff; background: var(--green); font: 700 18px/1 serif; }
.brand-name { font-size: 18px; font-weight: 700; letter-spacing: 0; }
.desktop-nav { display: flex; align-items: center; gap: 34px; margin-left: auto; font-size: 14px; }
.desktop-nav a { position: relative; padding: 23px 0; }
.desktop-nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 18px; height: 2px; background: currentColor; transition: right .2s ease; }
.desktop-nav a:hover::after, .desktop-nav a:focus-visible::after { right: 0; }
.header-phone { min-height: 40px; display: inline-flex; align-items: center; gap: 8px; padding: 0 15px; border: 1px solid currentColor; font-size: 14px; font-weight: 700; }
.header-phone svg, .menu-toggle svg { width: 17px; height: 17px; }
.menu-toggle { width: 42px; height: 42px; display: none; place-items: center; padding: 0; color: currentColor; background: transparent; border: 0; cursor: pointer; }
.mobile-nav { position: fixed; inset: var(--header-height) 0 0; padding: 38px 24px; color: var(--ink); background: #fff; }
.mobile-nav a { display: block; padding: 16px 0; border-bottom: 1px solid var(--line); font-size: 20px; font-weight: 700; }
.mobile-nav a:last-child { margin-top: 24px; padding: 15px 18px; color: #fff; background: var(--green); border: 0; font-size: 16px; text-align: center; }

.hero { min-height: 660px; height: min(88vh, 880px); position: relative; display: flex; align-items: center; color: #fff; overflow: hidden; }
.hero-image, .hero-overlay { position: absolute; inset: 0; }
.hero-image { background: url("https://images.unsplash.com/photo-1464822759023-fed622ff2c3b?auto=format&fit=crop&w=2200&q=88") center 48%/cover no-repeat; transform: scale(1.02); animation: hero-in 1.2s ease-out both; }
.hero-overlay { background: linear-gradient(90deg, rgba(9,28,24,.78) 0%, rgba(9,28,24,.44) 48%, rgba(9,28,24,.08) 100%), linear-gradient(0deg, rgba(9,28,24,.26), transparent 50%); }
.hero-content { width: min(calc(100% - 48px), var(--max-width)); position: relative; z-index: 2; margin: 40px auto 0; }
.eyebrow, .section-label { margin: 0 0 14px; color: var(--coral); font-size: 12px; font-weight: 800; letter-spacing: 2px; }
.hero .eyebrow { color: #f1b39f; }
.hero h1 { max-width: 700px; margin: 0; font-size: clamp(60px, 8vw, 112px); line-height: 1.05; letter-spacing: 0; font-family: "STSong", "SimSun", serif; font-weight: 700; }
.hero-lead { max-width: 620px; margin: 24px 0 34px; font-size: clamp(19px, 2vw, 27px); line-height: 1.5; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.button { min-height: 50px; display: inline-flex; align-items: center; justify-content: center; gap: 10px; padding: 0 22px; border: 1px solid transparent; font-size: 15px; font-weight: 700; transition: transform .2s ease, background .2s ease; }
.button:hover { transform: translateY(-2px); }
.button svg { width: 18px; }
.button-primary { color: #fff; background: var(--coral); }
.button-primary:hover { background: #bb5137; }
.button-ghost { color: #fff; border-color: rgba(255,255,255,.7); background: rgba(255,255,255,.06); }
.button-ghost:hover { background: rgba(255,255,255,.14); }
.hero-scroll { position: absolute; z-index: 2; bottom: 26px; left: 50%; display: flex; flex-direction: column; align-items: center; gap: 2px; transform: translateX(-50%); font-size: 11px; }
.hero-scroll svg { width: 18px; animation: nudge 1.6s ease-in-out infinite; }

.section { padding: 110px 0; }
.section-inner { width: min(calc(100% - 48px), var(--max-width)); margin: 0 auto; }
.section-heading { max-width: 700px; margin-bottom: 64px; }
.section-heading h2, .about-title h2, .contact-section h2 { margin: 0; font: 700 clamp(34px, 4vw, 54px)/1.25 "STSong", "SimSun", serif; letter-spacing: 0; }
.section-heading > p:last-child { max-width: 600px; margin: 18px 0 0; color: var(--muted); font-size: 17px; }
.business-section { background: var(--paper); }
.business-feature { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(360px, .85fr); align-items: center; gap: clamp(48px, 7vw, 96px); margin-bottom: 120px; }
.business-feature:last-child { margin-bottom: 0; }
.go-feature .feature-media { order: 2; }
.go-feature .feature-copy { order: 1; }
.feature-media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; background: var(--soft); }
.feature-media::after { content: ""; position: absolute; inset: 0; box-shadow: inset 0 0 0 1px rgba(0,0,0,.06); pointer-events: none; }
.feature-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .65s ease; }
.business-feature:hover .feature-media img { transform: scale(1.035); }
.feature-index { position: absolute; right: 18px; bottom: 2px; color: rgba(255,255,255,.8); font: 700 56px/1 serif; }
.feature-icon { width: 46px; height: 46px; display: grid; place-items: center; margin-bottom: 25px; color: #fff; }
.feature-icon svg { width: 23px; }
.travel-icon { background: var(--coral); }
.go-icon { background: var(--green); }
.feature-kicker { margin: 0 0 4px; color: var(--muted); font-size: 13px; font-weight: 700; }
.feature-copy h3 { margin: 0; font: 700 clamp(34px, 4vw, 50px)/1.2 "STSong", "SimSun", serif; }
.feature-summary { margin: 18px 0 12px; color: var(--green); font-size: 19px; font-weight: 700; line-height: 1.6; }
.feature-copy > p:not(.feature-kicker):not(.feature-summary) { margin: 0; color: var(--muted); }
.feature-points { display: grid; gap: 8px; margin: 25px 0; padding: 0; list-style: none; }
.feature-points li { display: flex; align-items: center; gap: 10px; font-size: 14px; }
.feature-points svg { width: 17px; height: 17px; color: var(--coral); stroke-width: 3; }
.text-link { display: inline-flex; align-items: center; gap: 9px; padding-bottom: 3px; color: var(--ink); border-bottom: 1px solid var(--ink); font-size: 14px; font-weight: 700; }
.text-link svg { width: 16px; transition: transform .2s ease; }
.text-link:hover svg { transform: translateX(4px); }

.about-section { background: var(--soft); }
.about-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(60px, 10vw, 150px); }
.about-lead { margin-top: 4px; color: var(--green); font-size: 23px; font-weight: 700; line-height: 1.6; }
.about-copy p:not(.about-lead) { color: var(--muted); font-size: 16px; }
.cooperation-section { padding-bottom: 120px; }
.cooperation-grid { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.cooperation-item { min-height: 280px; position: relative; padding: 38px 30px; border-right: 1px solid var(--line); }
.cooperation-item:last-child { border-right: 0; }
.cooperation-item > svg { width: 31px; height: 31px; color: var(--green); }
.cooperation-item > span { position: absolute; top: 38px; right: 30px; color: #9ca7a3; font: 700 13px/1 monospace; }
.cooperation-item h3 { margin: 55px 0 8px; font-size: 20px; }
.cooperation-item p { margin: 0; color: var(--muted); font-size: 14px; }

.contact-section { padding: 110px 24px; color: #fff; background: var(--green-dark); text-align: center; }
.contact-inner { width: min(100%, 760px); margin: 0 auto; }
.contact-section .section-label { color: #f1b39f; }
.contact-section > div > p:not(.section-label) { margin: 20px auto 34px; color: rgba(255,255,255,.76); }
.contact-phone { width: min(100%, 470px); min-height: 94px; display: flex; align-items: center; gap: 16px; margin: 0 auto; padding: 15px 20px; color: var(--ink); background: #fff; text-align: left; transition: transform .2s ease, box-shadow .2s ease; }
.contact-phone:hover { transform: translateY(-3px); box-shadow: 0 14px 30px rgba(0,0,0,.16); }
.phone-icon { width: 54px; height: 54px; display: grid; place-items: center; flex: 0 0 auto; color: #fff; background: var(--coral); }
.phone-icon svg { width: 23px; }
.contact-phone small { display: block; color: var(--muted); font-size: 12px; }
.contact-phone strong { display: block; font-size: clamp(21px, 5vw, 29px); line-height: 1.25; }
.phone-arrow { width: 22px; margin-left: auto; color: var(--green); }

.site-footer { padding: 46px 0; background: #111816; color: #fff; }
.footer-inner { width: min(calc(100% - 48px), var(--max-width)); margin: 0 auto; display: grid; grid-template-columns: 1fr auto 1fr; align-items: center; gap: 40px; }
.footer-brand { display: flex; align-items: center; gap: 11px; }
.footer-brand strong, .footer-brand small { display: block; }
.footer-brand small { color: #84908c; font-size: 9px; letter-spacing: 1.5px; }
.footer-links { display: flex; gap: 24px; color: #b5bfbb; font-size: 13px; }
.footer-links a:hover { color: #fff; }
.copyright { margin: 0; color: #84908c; font-size: 11px; line-height: 1.8; text-align: right; }
.copyright a:hover { color: #fff; }
.floating-call { display: none; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s ease; }
.reveal.visible { opacity: 1; transform: none; }
@keyframes hero-in { from { opacity: .5; transform: scale(1.08); } to { opacity: 1; transform: scale(1.02); } }
@keyframes nudge { 0%,100% { transform: translateY(0); } 50% { transform: translateY(5px); } }

@media (max-width: 860px) {
  :root { --header-height: 64px; }
  .header-inner { width: calc(100% - 32px); }
  .desktop-nav, .header-phone { display: none; }
  .menu-toggle { display: grid; margin-left: auto; }
  .hero { min-height: 610px; height: 84vh; }
  .hero-content, .section-inner, .footer-inner { width: calc(100% - 40px); }
  .hero-overlay { background: linear-gradient(90deg, rgba(9,28,24,.75), rgba(9,28,24,.25)), linear-gradient(0deg, rgba(9,28,24,.35), transparent 60%); }
  .hero h1 { font-size: clamp(54px, 17vw, 80px); }
  .section { padding: 80px 0; }
  .section-heading { margin-bottom: 42px; }
  .business-feature { grid-template-columns: 1fr; gap: 34px; margin-bottom: 86px; }
  .go-feature .feature-media, .go-feature .feature-copy { order: initial; }
  .feature-copy { max-width: 620px; }
  .about-grid { grid-template-columns: 1fr; gap: 30px; }
  .cooperation-grid { grid-template-columns: 1fr; }
  .cooperation-item { min-height: 220px; border-right: 0; border-bottom: 1px solid var(--line); }
  .cooperation-item:last-child { border-bottom: 0; }
  .footer-inner { grid-template-columns: 1fr; gap: 30px; }
  .copyright { text-align: left; }
}

@media (max-width: 560px) {
  .brand-name { font-size: 17px; }
  .hero { min-height: 600px; }
  .hero-image { background-position: 58% center; }
  .hero-content { margin-top: 20px; }
  .hero-lead { max-width: 330px; margin-top: 18px; font-size: 18px; }
  .hero-actions { align-items: stretch; }
  .button { width: 100%; }
  .section-heading h2, .about-title h2, .contact-section h2 { font-size: 34px; }
  .business-feature { gap: 28px; }
  .feature-media { aspect-ratio: 4 / 3; }
  .feature-icon { margin-bottom: 18px; }
  .feature-copy h3 { font-size: 35px; }
  .contact-section { padding: 80px 20px 110px; }
  .contact-phone { padding: 13px; }
  .phone-icon { width: 46px; height: 46px; }
  .contact-phone strong { font-size: 21px; }
  .footer-links { flex-wrap: wrap; }
  .floating-call { min-height: 48px; display: flex; position: fixed; z-index: 90; right: 14px; bottom: 14px; align-items: center; gap: 8px; padding: 0 17px; color: #fff; background: var(--coral); box-shadow: 0 8px 24px rgba(46,37,29,.25); font-size: 14px; font-weight: 700; }
  .floating-call svg { width: 17px; }
}

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