:root {
  --navy-950: #071a2c;
  --navy-900: #0b243c;
  --navy-800: #103657;
  --blue-600: #1769e0;
  --blue-500: #2a7cf0;
  --cyan-400: #45d5e9;
  --orange-500: #f78132;
  --ink: #102235;
  --muted: #5f6f80;
  --line: #dbe5ed;
  --soft: #f3f7fa;
  --paper: #ffffff;
  --shadow: 0 22px 70px rgba(7, 26, 44, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
button, input, textarea { font: inherit; }

.site-header {
  position: fixed;
  z-index: 50;
  inset: 0 0 auto;
  display: grid;
  grid-template-columns: auto 1fr auto auto auto;
  align-items: center;
  gap: 24px;
  min-height: 76px;
  padding: 12px clamp(18px, 4vw, 64px);
  color: #fff;
  border-bottom: 1px solid rgba(255,255,255,.13);
  transition: background .2s ease, box-shadow .2s ease, color .2s ease;
}
.site-header.is-scrolled,
.site-header.solid {
  color: var(--ink);
  background: rgba(255,255,255,.96);
  box-shadow: 0 8px 30px rgba(7,26,44,.08);
  backdrop-filter: blur(16px);
}
.brand { display: flex; align-items: center; gap: 10px; min-width: 230px; }
.brand-mark {
  display: grid; place-items: center; width: 42px; height: 42px;
  border-radius: 13px; color: white; background: linear-gradient(145deg, var(--blue-500), var(--cyan-400));
  box-shadow: 0 8px 18px rgba(23,105,224,.28); font-size: 21px; font-weight: 900;
}
.brand strong, .brand small { display: block; line-height: 1.25; }
.brand strong { font-size: 16px; letter-spacing: .02em; }
.brand small { opacity: .72; font-size: 11px; }
.main-nav { display: flex; justify-content: center; gap: clamp(14px, 2vw, 30px); }
.main-nav a { padding: 9px 0; font-size: 14px; font-weight: 650; white-space: nowrap; }
.main-nav a:hover { color: var(--cyan-400); }
.site-header.is-scrolled .main-nav a:hover, .site-header.solid .main-nav a:hover { color: var(--blue-600); }
.phone-link { font-weight: 800; white-space: nowrap; }
.language-switcher {
  display: inline-flex; align-items: center; gap: 3px; padding: 3px;
  border: 1px solid rgba(255,255,255,.26); border-radius: 11px; background: rgba(255,255,255,.08);
}
.language-switcher a {
  display: grid; place-items: center; min-width: 30px; height: 30px; padding: 0 6px;
  border-radius: 8px; font-size: 11px; font-weight: 900; line-height: 1;
}
.language-switcher a:hover { color: var(--cyan-400); }
.language-switcher a[aria-current="page"] { color: var(--navy-900); background: #fff; }
.site-header.is-scrolled .language-switcher,
.site-header.solid .language-switcher { border-color: var(--line); background: var(--soft); }
.site-header.is-scrolled .language-switcher a:hover,
.site-header.solid .language-switcher a:hover { color: var(--blue-600); }
.header-cta, .button {
  display: inline-flex; align-items: center; justify-content: center; min-height: 46px;
  padding: 11px 20px; border-radius: 13px; font-weight: 800; white-space: nowrap; transition: transform .18s ease, box-shadow .18s ease;
}
.header-cta, .button.primary { color: #fff; background: var(--orange-500); box-shadow: 0 10px 24px rgba(247,129,50,.26); }
.button.secondary { color: #fff; border: 1px solid rgba(255,255,255,.46); background: rgba(255,255,255,.08); }
.button.light { color: var(--blue-600); background: #fff; }
.button:hover, .header-cta:hover { transform: translateY(-2px); }
.menu-button { display: none; width: 42px; height: 42px; border: 1px solid currentColor; border-radius: 12px; color: inherit; background: transparent; }

.hero {
  position: relative; display: grid; grid-template-columns: minmax(0,1.08fr) minmax(380px,.92fr); align-items: center;
  min-height: 780px; padding: 140px clamp(22px, 6vw, 92px) 86px; overflow: hidden; color: #fff;
  background: radial-gradient(circle at 75% 28%, rgba(69,213,233,.2), transparent 28%), linear-gradient(120deg, var(--navy-950), var(--navy-800));
}
.hero::before {
  content: ""; position: absolute; inset: 0; opacity: .26;
  background-image: linear-gradient(rgba(255,255,255,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.045) 1px, transparent 1px);
  background-size: 46px 46px; mask-image: linear-gradient(90deg, transparent, black 55%, black);
}
.hero-copy { position: relative; z-index: 2; max-width: 760px; }
.eyebrow { margin: 0 0 14px; color: var(--cyan-400); font-size: 13px; font-weight: 900; letter-spacing: .13em; text-transform: uppercase; }
h1,h2,h3,p { margin-top: 0; }
h1 { margin-bottom: 20px; font-size: clamp(46px, 6.8vw, 88px); line-height: 1.02; letter-spacing: -.045em; }
h2 { margin-bottom: 16px; font-size: clamp(30px, 4.4vw, 54px); line-height: 1.12; letter-spacing: -.03em; }
h3 { margin-bottom: 10px; font-size: 21px; line-height: 1.3; }
.hero-lead { max-width: 690px; color: rgba(255,255,255,.79); font-size: clamp(18px,2vw,23px); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 32px 0 38px; }
.proof-row { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; max-width: 720px; }
.proof-row div { padding: 16px 17px; border: 1px solid rgba(255,255,255,.14); border-radius: 16px; background: rgba(255,255,255,.06); }
.proof-row strong, .proof-row span { display: block; }
.proof-row strong { margin-bottom: 4px; color: #fff; font-size: 18px; }
.proof-row span { color: rgba(255,255,255,.62); font-size: 13px; }

.route-visual { position: relative; z-index: 2; min-height: 510px; margin-left: clamp(0px,3vw,40px); }
.route-globe {
  position: absolute; top: 55px; right: 4%; width: min(430px, 84%); aspect-ratio: 1;
  border: 1px solid rgba(69,213,233,.35); border-radius: 50%; box-shadow: inset 0 0 80px rgba(69,213,233,.08), 0 0 120px rgba(42,124,240,.12);
}
.route-globe::before, .route-globe::after { content: ""; position: absolute; inset: 15%; border: 1px solid rgba(255,255,255,.12); border-radius: 50%; }
.route-globe::after { inset: 8% 38%; }
.route-line { position: absolute; left: 11%; right: 6%; top: 48%; height: 2px; transform: rotate(-13deg); background: linear-gradient(90deg,var(--orange-500),var(--cyan-400)); box-shadow: 0 0 18px var(--cyan-400); }
.plane { position: absolute; top: 34%; left: 48%; font-size: 42px; transform: rotate(32deg); filter: drop-shadow(0 7px 12px rgba(0,0,0,.25)); }
.city-card { position: absolute; min-width: 142px; padding: 15px 18px; border: 1px solid rgba(255,255,255,.18); border-radius: 16px; background: rgba(7,26,44,.72); backdrop-filter: blur(14px); box-shadow: var(--shadow); }
.city-card strong,.city-card span { display: block; }
.city-card span { color: rgba(255,255,255,.6); font-size: 12px; }
.city-card.guangzhou { left: 2%; bottom: 16%; }
.city-card.london { right: 0; top: 11%; }
.city-card.europe { right: 8%; bottom: 4%; }
.cargo-stack { position: absolute; left: 26%; bottom: 0; display: flex; align-items: end; gap: 8px; }
.cargo-stack span { display: block; width: 62px; height: 74px; border: 1px solid rgba(255,255,255,.2); border-radius: 8px; background: linear-gradient(145deg,rgba(247,129,50,.8),rgba(176,74,19,.8)); box-shadow: 0 14px 30px rgba(0,0,0,.18); }
.cargo-stack span:nth-child(2) { height: 52px; background: linear-gradient(145deg,rgba(42,124,240,.9),rgba(19,67,128,.9)); }

.section { padding: clamp(68px, 8vw, 112px) clamp(22px, 5vw, 72px); }
.section.soft { background: var(--soft); }
.section.dark { color: #fff; background: var(--navy-950); }
.section-inner { width: min(1180px,100%); margin: 0 auto; }
.section-head { max-width: 760px; margin-bottom: 34px; }
.section-head > p:not(.eyebrow), .muted { color: var(--muted); }
.dark .section-head > p:not(.eyebrow) { color: rgba(255,255,255,.65); }
.service-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; }
.service-card { position: relative; padding: 28px; border: 1px solid var(--line); border-radius: 22px; background: #fff; box-shadow: 0 12px 40px rgba(7,26,44,.05); overflow: hidden; }
.service-card::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 4px; background: linear-gradient(var(--blue-500),var(--cyan-400)); }
.service-code { display: inline-flex; margin-bottom: 26px; padding: 6px 10px; border-radius: 9px; color: var(--blue-600); background: #eaf3ff; font-size: 12px; font-weight: 900; }
.service-card p, .service-card li { color: var(--muted); font-size: 14px; }
.service-card ul { padding-left: 18px; margin-bottom: 0; }
.text-link { display: inline-block; margin-top: 16px; color: var(--blue-600); font-weight: 800; }
.text-link::after { content: " →"; }

.route-table { width: 100%; border-collapse: collapse; overflow: hidden; border-radius: 20px; background: #fff; box-shadow: var(--shadow); }
.route-table th, .route-table td { padding: 18px 20px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.route-table th { color: #fff; background: var(--navy-800); font-size: 13px; }
.route-table td { font-size: 14px; }
.route-table tr:last-child td { border-bottom: 0; }
.tag { display: inline-block; margin: 3px 4px 3px 0; padding: 4px 8px; border-radius: 999px; color: var(--navy-800); background: #e9f4f7; font-size: 12px; }

.split { display: grid; grid-template-columns: .9fr 1.1fr; gap: clamp(32px,7vw,96px); align-items: start; }
.process { counter-reset: step; display: grid; gap: 14px; }
.process article { position: relative; padding: 22px 22px 22px 72px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
.process article::before { counter-increment: step; content: "0" counter(step); position: absolute; left: 20px; top: 22px; color: var(--blue-600); font-weight: 900; }
.process p { margin-bottom: 0; color: var(--muted); }

.article-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.article-card { display: flex; flex-direction: column; min-height: 290px; padding: 26px; border: 1px solid var(--line); border-radius: 22px; background: #fff; box-shadow: 0 12px 40px rgba(7,26,44,.05); }
.article-card .meta { display: flex; gap: 10px; color: var(--blue-600); font-size: 12px; font-weight: 800; }
.article-card h3 { margin-top: 28px; }
.article-card p { color: var(--muted); }
.article-card .text-link { margin-top: auto; }
.answer-box { margin: 28px 0; padding: 24px; border-left: 4px solid var(--cyan-400); border-radius: 0 16px 16px 0; background: #eef9fb; }
.related-links { display: grid; gap: 8px; margin-top: 48px; padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: var(--soft); }
.related-links strong { margin-bottom: 4px; }
.related-links a { color: var(--blue-600); font-size: 15px; font-weight: 750; }
.related-links a::after { content: " →"; }

.cta-band { display: grid; grid-template-columns: 1fr auto; gap: 30px; align-items: center; padding: 40px; border-radius: 28px; color: #fff; background: linear-gradient(120deg,var(--blue-600),#174f9c); box-shadow: var(--shadow); }
.cta-band h2 { margin-bottom: 6px; font-size: clamp(28px,4vw,44px); }
.cta-band p { margin-bottom: 0; color: rgba(255,255,255,.75); }

.page-hero { padding: 150px clamp(22px,5vw,72px) 78px; color: #fff; background: radial-gradient(circle at 80% 20%,rgba(69,213,233,.17),transparent 30%),var(--navy-950); }
.page-hero .section-inner { max-width: 900px; margin-left: auto; margin-right: auto; }
.page-hero h1 { max-width: 930px; font-size: clamp(42px,6vw,72px); }
.page-hero p:not(.eyebrow) { max-width: 780px; color: rgba(255,255,255,.68); font-size: 18px; }
.breadcrumbs { margin-bottom: 18px; color: rgba(255,255,255,.55); font-size: 13px; }
.content-shell { display: grid; grid-template-columns: minmax(0,760px) 280px; gap: 60px; align-items: start; width: min(1100px,100%); margin: 0 auto; }
.prose { font-size: 17px; }
.prose h2 { margin-top: 48px; font-size: 32px; }
.prose p, .prose li { color: #33485c; }
.prose li { margin-bottom: 8px; }
.toc { position: sticky; top: 108px; padding: 22px; border: 1px solid var(--line); border-radius: 18px; background: var(--soft); }
.toc strong { display: block; margin-bottom: 12px; }
.toc a { display: block; padding: 7px 0; color: var(--muted); font-size: 13px; }
.faq-list { display: grid; gap: 12px; }
details { border: 1px solid var(--line); border-radius: 16px; background: #fff; }
summary { padding: 18px 20px; cursor: pointer; font-weight: 800; }
details p { padding: 0 20px 20px; margin: 0; color: var(--muted); }
.contact-panel { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.contact-card { padding: 34px; border-radius: 24px; color: #fff; background: var(--navy-900); }
.contact-card .big-phone { display: block; margin: 20px 0; color: var(--cyan-400); font-size: clamp(28px,4vw,46px); font-weight: 900; letter-spacing: -.03em; }
.contact-card dl { margin: 0; }
.contact-card dt { color: rgba(255,255,255,.5); font-size: 12px; }
.contact-card dd { margin: 4px 0 18px; font-weight: 750; }

.site-footer { padding: 46px clamp(22px,5vw,72px); color: rgba(255,255,255,.62); background: #041320; }
.footer-inner { display: grid; grid-template-columns: 1fr auto; gap: 24px; width: min(1180px,100%); margin: 0 auto; }
.footer-brand { color: #fff; font-weight: 900; }
.footer-links { display: flex; flex-wrap: wrap; gap: 18px; font-size: 13px; }
.footer-note { grid-column: 1/-1; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.1); font-size: 12px; }
.floating-contact { position: fixed; z-index: 45; right: 18px; bottom: 18px; display: flex; align-items: center; gap: 8px; padding: 12px 16px; border-radius: 999px; color: #fff; background: var(--orange-500); box-shadow: 0 14px 34px rgba(247,129,50,.38); font-weight: 900; }

@media (max-width: 1320px) {
  .site-header { grid-template-columns: auto 1fr auto auto; }
  .phone-link { display: none; }
}

@media (max-width: 1000px) {
  .site-header { grid-template-columns: auto 1fr auto auto; }
  .phone-link { display: none; }
  .main-nav { position: absolute; top: 76px; left: 16px; right: 16px; display: none; padding: 16px; border-radius: 16px; color: var(--ink); background: #fff; box-shadow: var(--shadow); }
  .main-nav.is-open { display: grid; }
  .menu-button { display: block; justify-self: end; }
  .hero { grid-template-columns: 1fr; min-height: auto; padding-top: 130px; }
  .route-visual { min-height: 420px; margin: 30px auto 0; width: min(620px,100%); }
  .service-grid { grid-template-columns: repeat(2,1fr); }
  .article-grid { grid-template-columns: repeat(2,1fr); }
  .content-shell { grid-template-columns: 1fr; }
  .toc { position: static; order: -1; }
}
@media (max-width: 680px) {
  .site-header { grid-template-columns: auto 1fr auto; min-height: 68px; padding: 10px 16px; gap: 9px; }
  .brand { min-width: auto; }
  .brand-mark { width: 38px; height: 38px; }
  .brand strong { font-size: 13px; }
  .brand small { display: none; }
  .header-cta { display: none; }
  .language-switcher { justify-self: end; }
  .language-switcher a { min-width: 27px; height: 28px; padding: 0 4px; font-size: 10px; }
  .main-nav { top: 68px; }
  .hero { padding: 118px 20px 66px; }
  h1 { font-size: 46px; }
  .proof-row { grid-template-columns: 1fr; }
  .route-visual { min-height: 340px; }
  .route-globe { top: 25px; width: 82%; }
  .plane { top: 31%; }
  .city-card { min-width: 120px; padding: 11px 13px; }
  .cargo-stack { display: none; }
  .service-grid, .article-grid, .split, .contact-panel { grid-template-columns: 1fr; }
  .route-table { display: block; overflow-x: auto; white-space: nowrap; }
  .cta-band, .footer-inner { grid-template-columns: 1fr; }
  .footer-note { grid-column: auto; }
  .floating-contact { right: 12px; bottom: 12px; font-size: 13px; }
}