:root {
  --navy: #172a46;
  --teal: #1f8a83;
  --teal-dark: #176d68;
  --cream: #f7f5f0;
  --paper: #fffefa;
  --ink: #263238;
  --muted: #5d696e;
  --line: #d7ddd9;
  --max: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--cream);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans CJK SC", "Microsoft YaHei", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; }
a { color: var(--teal-dark); text-underline-offset: 3px; }
a:hover { color: var(--navy); }
a:focus-visible, button:focus-visible { outline: 3px solid #f2b84b; outline-offset: 3px; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 100; background: var(--navy); color: white; padding: .6rem .9rem; }
.skip-link:focus { top: 1rem; }
.wrap { width: min(calc(100% - 2.5rem), var(--max)); margin-inline: auto; }

.site-header { background: rgba(247,245,240,.97); border-bottom: 1px solid var(--line); position: sticky; top: 0; z-index: 20; }
.header-inner { min-height: 84px; display: flex; align-items: center; gap: 2rem; }
.brand { display: inline-flex; align-items: center; flex: 0 0 auto; }
.brand img { width: 210px; display: block; }
.nav-toggle { display: none; margin-left: auto; border: 1px solid var(--line); background: transparent; color: var(--navy); padding: .55rem .75rem; font: inherit; }
.site-nav { display: flex; align-items: center; gap: 1.4rem; margin-left: auto; }
.site-nav a { color: var(--navy); text-decoration: none; font-size: .9rem; font-weight: 650; white-space: nowrap; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--teal-dark); }
.lang-switch { display: flex; border-left: 1px solid var(--line); padding-left: 1rem; gap: .25rem; }
.lang-switch button { border: 0; background: transparent; color: var(--muted); padding: .35rem; font: inherit; font-weight: 700; cursor: pointer; }
.lang-switch button[aria-pressed="true"] { color: var(--teal-dark); text-decoration: underline; text-underline-offset: 5px; }

main { min-height: 64vh; }
.hero { padding: clamp(4rem, 8vw, 7.5rem) 0 5rem; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(300px, .95fr); align-items: center; gap: clamp(2rem, 7vw, 6rem); }
.eyebrow { margin: 0 0 1rem; color: var(--teal-dark); font-weight: 800; letter-spacing: .12em; text-transform: uppercase; font-size: .78rem; }
h1, h2, h3 { color: var(--navy); line-height: 1.2; }
h1 { margin: 0; font-size: clamp(2.4rem, 5.4vw, 4.8rem); letter-spacing: -.035em; }
.hero h1 .secondary-title { display: block; margin-top: 1rem; font-size: clamp(1.45rem, 2.5vw, 2.25rem); letter-spacing: -.02em; }
.lede { max-width: 66ch; margin: 1.75rem 0 0; font-size: 1.08rem; }
.hero-company { margin: 2rem 0 0; padding-top: 1.4rem; border-top: 1px solid var(--line); color: var(--navy); font-weight: 750; }
.hero-art { min-height: 430px; display: grid; place-items: center; position: relative; }
.hero-art::before { content: ""; position: absolute; inset: 8% 4%; border: 1px solid rgba(31,138,131,.36); transform: rotate(-4deg); }
.hero-art::after { content: ""; position: absolute; width: 72%; aspect-ratio: 1; border: 1px solid rgba(23,42,70,.18); border-radius: 50%; }
.hero-art img { width: min(88%, 430px); position: relative; z-index: 1; }

.section { padding: clamp(3.5rem, 7vw, 6rem) 0; border-top: 1px solid var(--line); }
.section-paper { background: var(--paper); }
.section-navy { background: var(--navy); color: #f7f5f0; }
.section-navy h2, .section-navy h3 { color: white; }
.section-navy a { color: #7fe0d8; }
.section-head { display: grid; grid-template-columns: .7fr 1.3fr; gap: 3rem; align-items: start; margin-bottom: 2.5rem; }
.section h2 { margin: 0; font-size: clamp(1.8rem, 3vw, 2.7rem); }
.section-intro { margin: 0; max-width: 68ch; }
.facts { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--line); }
.fact { padding: 1.5rem 1.5rem 0 0; }
.fact + .fact { border-left: 1px solid var(--line); padding-left: 1.5rem; }
.fact strong { display: block; color: var(--navy); font-size: 1.05rem; }
.fact p { margin: .45rem 0 0; color: var(--muted); }
.market-list { display: flex; flex-wrap: wrap; gap: .7rem; margin: 1.5rem 0 0; padding: 0; list-style: none; }
.market-list li { border: 1px solid var(--line); background: var(--paper); color: var(--navy); padding: .5rem .8rem; }

.page-hero { padding: 4.5rem 0 3.5rem; border-bottom: 1px solid var(--line); }
.page-hero h1 { max-width: 17ch; font-size: clamp(2.25rem, 5vw, 4.3rem); }
.page-hero .lede { max-width: 72ch; }
.content-grid { display: grid; grid-template-columns: minmax(220px,.45fr) minmax(0,1.25fr); gap: clamp(2.5rem, 8vw, 7rem); }
.side-note { border-top: 3px solid var(--teal); padding-top: 1rem; color: var(--muted); }
.prose { max-width: 76ch; }
.prose h2 { margin: 2.8rem 0 .9rem; font-size: clamp(1.45rem, 2.3vw, 2rem); }
.prose h2:first-child { margin-top: 0; }
.prose h3 { margin: 2rem 0 .6rem; }
.prose p, .prose ul { margin: .8rem 0; }
.prose li + li { margin-top: .35rem; }
.notice { margin: 2rem 0; padding: 1.4rem 1.5rem; border-left: 4px solid var(--teal); background: #eaf4f1; }
.statement { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid var(--line); font-size: .93rem; color: var(--muted); }
.contact-list { margin: 2rem 0 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
.contact-list li { display: grid; grid-template-columns: 9rem 1fr; gap: 1rem; padding: 1rem 0; border-bottom: 1px solid var(--line); }
.contact-list strong { color: var(--navy); }
.contact-list a[href^="tel:"] { white-space: nowrap; }

.site-footer { background: #102039; color: #dfe6e4; padding: 3rem 0; }
.footer-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 2rem; }
.footer-brand { color: white; font-weight: 750; }
.footer-links { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 1.1rem; }
.footer-links a { color: #dfe6e4; }
.footer-note { grid-column: 1 / -1; margin: .5rem 0 0; padding-top: 1.2rem; border-top: 1px solid rgba(255,255,255,.18); font-size: .88rem; color: #b7c3c1; }

[data-lang="en"] { display: none; }
html.lang-en [data-lang="zh"] { display: none; }
html.lang-en [data-lang="en"] { display: revert; }

@media (max-width: 960px) {
  .header-inner { flex-wrap: wrap; gap: .7rem; padding: .8rem 0; }
  .nav-toggle { display: inline-block; }
  .site-nav { display: none; order: 3; width: 100%; flex-direction: column; align-items: stretch; gap: 0; padding-top: .5rem; }
  .site-nav.is-open { display: flex; }
  .site-nav a { padding: .65rem 0; border-top: 1px solid var(--line); }
  .lang-switch { margin-left: .4rem; }
  .hero-grid, .section-head, .content-grid { grid-template-columns: 1fr; }
  .hero-art { min-height: 320px; }
  .section-head { gap: 1.2rem; }
}

@media (min-width: 961px) {
  .hero h1 { font-size: clamp(3rem, 3.8vw, 3.5rem); }
}

@media (max-width: 640px) {
  .wrap { width: min(calc(100% - 2rem), var(--max)); }
  .brand img { width: 165px; }
  .lang-switch { border: 0; padding: 0; }
  .hero { padding-top: 3rem; }
  .hero-art { min-height: 250px; }
  .facts { grid-template-columns: 1fr; }
  .fact { padding: 1.2rem 0; }
  .fact + .fact { border-left: 0; border-top: 1px solid var(--line); padding-left: 0; }
  .contact-list li { grid-template-columns: 1fr; gap: .2rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-links { justify-content: flex-start; }
}

@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }