:root {
  --blue-900: #0b3a66;
  --blue-700: #08509f;
  --blue-600: #0a6fdc;
  --blue-500: #0a5fc0;
  --text: #24405c;
  --glass: rgba(240, 248, 255, .7);
  --glass-sky: rgba(214, 236, 255, .7);
  --glass-line: rgba(255, 255, 255, .7);
}

* { box-sizing: border-box; }
html {
  background: #cfe8ff;
  scroll-padding-top: 92px;
}
body {
  margin: 0;
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang HK", "PingFang TC", "Microsoft JhengHei", "Noto Sans TC", "Segoe UI", sans-serif;
  font-size: 17px;
  line-height: 1.75;
}
/* 整页照片固定在最底层,内容在上面滚动 */
body::before {
  content: "";
  position: fixed;
  top: 0;
  left: 0;
  z-index: -1;
  width: 100%;
  height: 100vh;
  height: 100lvh;
  background:
    linear-gradient(rgba(226, 243, 255, .24), rgba(196, 230, 255, .3)),
    url("/assets/hero.jpg") center / cover no-repeat;
}
h1, h2, h3, p, dl, dd { margin: 0; }
a { color: inherit; text-decoration: none; }
.wrap { width: min(1160px, 100% - 48px); margin-inline: auto; }

/* 玻璃层:一层半透明底色加背景模糊 */
.site-header, .hero-card, .intro, .box {
  background: var(--glass);
  -webkit-backdrop-filter: blur(18px) saturate(1.5) brightness(1.14);
  backdrop-filter: blur(18px) saturate(1.5) brightness(1.14);
}
.panel {
  background: var(--glass-sky);
  -webkit-backdrop-filter: blur(18px) saturate(1.5) brightness(1.14);
  backdrop-filter: blur(18px) saturate(1.5) brightness(1.14);
}

/* 顶栏 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--glass-line);
}
.header-row { display: flex; align-items: center; gap: 28px; min-height: 76px; }
.brand { display: flex; align-items: center; gap: 12px; margin-right: auto; }
.mark { width: 42px; height: 42px; flex: none; }
.mark rect { fill: var(--blue-600); }
.mark path { fill: none; stroke: #fff; stroke-width: 2.4; stroke-linecap: round; }
.brand-text { display: grid; line-height: 1.2; }
.brand-name { font-size: 20px; font-weight: 700; color: var(--blue-900); letter-spacing: .04em; }
.brand-sub { font-size: 11px; color: var(--text); letter-spacing: .2em; }
.nav { display: flex; align-items: center; gap: 28px; font-size: 16px; font-weight: 500; color: var(--blue-900); }
.nav a:hover { color: var(--blue-700); }
.lang { padding-left: 28px; border-left: 1px solid rgba(11, 58, 102, .22); }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 28px;
  border-radius: 10px;
  font-size: 17px;
  font-weight: 600;
}
.btn-sm { min-height: 42px; padding: 0 20px; font-size: 15px; }
.btn-primary { background: var(--blue-600); color: #fff; }
.btn-primary:hover { background: var(--blue-500); }
.btn-outline { border: 1px solid var(--blue-600); background: rgba(255, 255, 255, .5); color: var(--blue-700); }
.btn-outline:hover { background: rgba(255, 255, 255, .8); }

/* 横幅 */
.hero { display: flex; align-items: center; min-height: 640px; padding-block: 64px; }
.hero .wrap { width: min(1160px, 100% - 48px); }
.hero-card {
  width: min(660px, 100%);
  padding: 44px 48px;
  border: 1px solid var(--glass-line);
  border-radius: 20px;
}
.pill {
  display: inline-block;
  padding: 4px 14px;
  border: 1px solid rgba(10, 111, 220, .5);
  border-radius: 999px;
  background: rgba(255, 255, 255, .5);
  color: var(--blue-700);
  font-size: 14px;
  font-weight: 600;
}
.hero h1 {
  margin-top: 20px;
  color: var(--blue-900);
  font-size: clamp(32px, 4.2vw, 50px);
  line-height: 1.2;
  letter-spacing: .02em;
}
.hero-en { margin-top: 10px; color: var(--blue-900); font-size: clamp(17px, 2vw, 21px); }
.hero-line { margin-top: 16px; }
.actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 28px; }

/* 关于 */
.about { padding-bottom: 28px; }
.about-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.intro, .box, .panel { border: 1px solid var(--glass-line); border-radius: 20px; }
.intro { display: grid; align-content: center; padding: 44px 48px; }
.eyebrow { font-size: 14px; font-weight: 700; letter-spacing: .14em; color: var(--blue-700); }
h2 { margin-top: 6px; font-size: clamp(28px, 3.4vw, 38px); line-height: 1.3; color: var(--blue-900); }
.center { text-align: center; }
.body { margin-top: 16px; }
.panel { display: grid; gap: 16px; padding: 36px 40px; color: var(--blue-900); }
.panel div + div { padding-top: 16px; border-top: 1px solid rgba(11, 58, 102, .16); }
.panel dt { font-size: 14px; color: var(--blue-900); }
.panel dd { font-size: 18px; }

/* 主营业务与联络 */
.business { padding-bottom: 28px; }
.contact { padding-bottom: 72px; }
.box { padding: 48px; }
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; margin-top: 32px; }
.card {
  display: block;
  padding: 28px 26px;
  border: 1px solid rgba(255, 255, 255, .85);
  border-radius: 14px;
  background: rgba(255, 255, 255, .6);
}
a.card:hover { background: rgba(255, 255, 255, .9); }
.card svg {
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: 12px;
  background: rgba(10, 111, 220, .12);
  fill: none;
  stroke: var(--blue-600);
  stroke-width: 1.8;
  stroke-linejoin: round;
  stroke-linecap: round;
}
.card h3 { margin-top: 14px; font-size: 19px; color: var(--blue-900); }
.card p { margin-top: 4px; overflow-wrap: anywhere; }

/* 页脚 */
.site-footer {
  padding-top: 48px;
  background: rgba(10, 84, 160, .84);
  -webkit-backdrop-filter: blur(18px) saturate(1.5) brightness(1.14);
  backdrop-filter: blur(18px) saturate(1.5) brightness(1.14);
  color: #fff;
  font-size: 15px;
}
.footer-row { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; padding-bottom: 36px; }
.footer-row a { display: block; margin-top: 6px; }
.footer-row a:hover { color: #fff; text-decoration: underline; }
.foot-name { font-size: 18px; font-weight: 600; color: #fff; }
.foot-title { font-size: 15px; font-weight: 600; color: #fff; }
.copyright { padding-block: 18px; border-top: 1px solid rgba(255, 255, 255, .24); font-size: 14px; }

@media (prefers-reduced-motion: no-preference) {
  html { scroll-behavior: smooth; }
}

:focus-visible { outline: 2px solid var(--blue-700); outline-offset: 2px; }
.site-footer :focus-visible { outline-color: #fff; }
.error-page h1 { color: var(--blue-900); line-height: 1.2; }
.error-page { min-height: 100vh; display: flex; align-items: center; justify-content: center; padding: 24px; }

@media (max-width: 860px) {
  html { scroll-padding-top: 116px; }
  body::before {
    background:
      linear-gradient(rgba(226, 243, 255, .24), rgba(196, 230, 255, .3)),
      url("/assets/hero.jpg") 88% center / cover no-repeat;
  }
  .header-row { flex-wrap: wrap; gap: 8px 16px; padding-block: 12px; }
  .nav { order: 3; width: 100%; gap: 18px; font-size: 15px; }
  .lang { margin-left: auto; padding-left: 0; border-left: 0; }
  .hero { min-height: 0; padding-block: 40px; }
  .about-row { grid-template-columns: 1fr; gap: 20px; }
  .cards { grid-template-columns: 1fr; gap: 14px; }
  .footer-row { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 480px) {
  .error-page { padding-inline: 16px; }
  .wrap, .hero .wrap { width: calc(100% - 32px); }
  .hero-card, .intro, .panel, .box { padding: 28px 24px; }
  .mark { width: 34px; height: 34px; }
  .brand { gap: 8px; }
  .brand-name { font-size: 17px; }
  .brand-sub { font-size: 10px; letter-spacing: .12em; }
  .btn-sm { min-height: 38px; padding-inline: 12px; font-size: 14px; }
  .nav { font-size: 14px; gap: 14px; white-space: nowrap; }
  .hero h1 { font-size: 7.2vw; }
  .actions .btn { width: 100%; }
}

/* 系统要求减少透明效果时改用实色 */
@media (prefers-reduced-transparency: reduce) {
  .site-header, .hero-card, .intro, .box { background: #fff; }
  .site-header, .hero-card, .intro, .box, .panel, .site-footer {
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }
  .panel { background: #e6f3ff; }
  .site-footer { background: var(--blue-900); }
}