:root {
  --blue: #0b4c77;
  --blue-2: #1d6fa5;
  --blue-soft: #eaf3f9;
  --ink: #101820;
  --muted: #667085;
  --line: #dce6ee;
  --bg: #f7fafc;
  --white: #fff;
  --radius: 14px;
  --shadow: 0 20px 50px rgba(16, 24, 32, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4, p { margin: 0; }
button, input, textarea { font: inherit; }
.shell { width: min(1480px, calc(100% - clamp(32px, 5vw, 128px))); margin: 0 auto; }
.muted { color: var(--muted); }
.eyebrow {
  display: block;
  color: var(--blue-2);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .2em;
  text-transform: uppercase;
}
.eyebrow--title { text-transform: none; letter-spacing: .14em; }
.section { padding: 72px 0; }
.section-soft { background: linear-gradient(180deg, #f5f9fc 0%, #edf4f9 100%); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .75s ease, transform .75s cubic-bezier(.2, .7, .2, 1); }
.reveal.is-revealed { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}
.section-title { margin-top: 8px; font-size: clamp(28px, 3.2vw, 40px); line-height: 1.15; letter-spacing: -.03em; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 28px; }
.section-head p { margin-top: 8px; color: var(--muted); font-size: 14px; }
.text-link { color: var(--blue); font-size: 14px; font-weight: 600; }
.text-link:hover { color: var(--blue-2); }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  background: rgba(255, 255, 255, .96);
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  backdrop-filter: blur(14px);
  transition: background .25s ease, color .25s ease, border-color .25s ease;
}
.site-header--overlay { background: transparent; border-color: transparent; color: var(--white); }
.site-header--overlay.is-solid { background: rgba(255,255,255,.96); border-color: var(--line); color: var(--ink); }
.header-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; height: 68px; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark { display: grid; place-items: center; width: 38px; height: 38px; border-radius: 8px; background: var(--blue); color: var(--white); font-weight: 800; font-size: 14px; }
.site-header--overlay .brand-mark { background: var(--white); color: var(--blue); }
.brand-copy strong { display: block; font-size: 15px; line-height: 1.2; }
.brand-copy small { display: block; margin-top: 2px; font-size: 9px; letter-spacing: .2em; opacity: .6; }
.main-nav { display: flex; align-items: center; gap: 18px; font-size: 14px; font-weight: 500; }
.main-nav > a, .nav-mega > a { display: inline-flex; align-items: center; gap: 5px; padding: 8px 4px; opacity: .86; }
.main-nav > a:hover, .nav-mega > a:hover { opacity: 1; }
.chev { font-size: 14px; opacity: .6; }
.nav-mega { position: relative; }
.mega-panel {
  display: none;
  position: absolute;
  left: -90px;
  top: 38px;
  width: 540px;
  padding: 24px;
  border-radius: 0 0 12px 12px;
  background: var(--blue);
  color: var(--white);
  box-shadow: var(--shadow);
}
.nav-mega:hover .mega-panel, .nav-mega:focus-within .mega-panel { display: block; }
.mega-head { padding-bottom: 16px; border-bottom: 1px solid rgba(255,255,255,.14); }
.mega-head .eyebrow { color: rgba(255,255,255,.55); }
.mega-head strong { display: block; margin-top: 5px; font-size: 18px; }
.mega-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; padding-top: 14px; }
.mega-item { padding: 12px; border: 1px solid rgba(255,255,255,.12); border-radius: 8px; transition: background .2s; }
.mega-item:hover { background: rgba(255,255,255,.1); }
.mega-item span { display: block; font-size: 14px; }
.mega-item small { display: block; margin-top: 3px; color: rgba(255,255,255,.55); font-size: 11px; }
.header-actions { display: flex; align-items: center; gap: 14px; }
.phone { font-size: 13px; opacity: .78; }
.menu-toggle { display: none; border: 0; background: transparent; color: inherit; font-size: 22px; cursor: pointer; }
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  min-height: 42px; padding: 0 18px; border-radius: 8px; border: 1px solid transparent;
  background: var(--blue); color: var(--white); font-size: 14px; font-weight: 600; cursor: pointer;
}
.button:hover { background: var(--blue-2); }
.button-light { background: var(--white); color: var(--blue); }
.button-light:hover { background: var(--blue-soft); }
.button-ghost { background: transparent; border-color: rgba(255,255,255,.28); color: inherit; }
.button-ghost:hover { background: rgba(255,255,255,.1); }
.button-outline { background: transparent; border-color: var(--line); color: var(--ink); }
.button-outline:hover { background: var(--bg); }
.button-full { width: 100%; margin-top: 16px; }

.site-main { padding-top: 68px; }
.home .site-main { padding-top: 0; }
.hero { position: relative; overflow: hidden; min-height: 100vh; min-height: 100svh; background: #04121e; color: var(--white); }
.hero-slides { display: grid; }
.hero-slide { grid-area: 1 / 1; position: relative; display: flex; flex-direction: column; min-height: 100vh; min-height: 100svh; opacity: 0; visibility: hidden; transition: opacity .9s ease, visibility .9s ease; }
.hero-slide.is-active { opacity: 1; visibility: visible; }
.hero-bg { position: absolute; inset: 0; overflow: hidden; background: #0b2b3f; }
.hero-bg img, .hero-bg video { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; object-position: center; }
.hero-slide.is-active .hero-bg img { animation: hero-kenburns 9s ease-out both; }
.hero-bg-placeholder { position: absolute; inset: 0; background: radial-gradient(circle at 70% 40%, #1d6fa5, #0b4c77 45%, #04121e); }
.hero-scrim {
  position: absolute; inset: 0;
  background:
    linear-gradient(90deg, rgba(4,18,30,.92) 0%, rgba(4,18,30,.66) 38%, rgba(4,18,30,.18) 72%, rgba(4,18,30,.05) 100%),
    linear-gradient(180deg, rgba(4,18,30,.55) 0%, transparent 26%, transparent 70%, rgba(4,18,30,.78) 100%);
}
.hero-shell { position: relative; z-index: 1; display: flex; flex-direction: column; justify-content: center; width: min(1200px, calc(100% - 48px)); min-height: 100vh; min-height: 100svh; margin: 0 auto; padding-top: 138px; padding-bottom: 150px; }
.hero-copy { max-width: 760px; }
.kicker { display: inline-flex; border: 1px solid rgba(255,255,255,.25); border-radius: 999px; padding: 5px 12px; color: rgba(255,255,255,.8); font-size: 12px; }
.hero-copy h1 { margin: 24px 0 18px; font-size: clamp(42px, 5.2vw, 66px); font-weight: 700; line-height: 1.08; letter-spacing: -.045em; }
.hero-copy p { max-width: 580px; color: rgba(255,255,255,.72); font-size: 16px; }
.tag-row { display: flex; flex-wrap: wrap; gap: 8px; }
.hero-copy .tag-row { margin-top: 18px; }
.tag { display: inline-flex; align-items: center; padding: 4px 9px; border: 1px solid var(--line); border-radius: 5px; color: var(--muted); font-size: 11px; line-height: 1.4; }
.hero-copy .tag { border-color: rgba(255,255,255,.22); color: rgba(255,255,255,.76); }
.tag-dark { border-color: rgba(255,255,255,.24); background: rgba(0,0,0,.28); color: var(--white); }
.tag-outline { border-color: var(--line); color: var(--muted); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero-metrics { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; max-width: 720px; margin-top: 34px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.24); }
.hero-metrics small { display: block; color: rgba(255,255,255,.55); font-size: 10px; letter-spacing: .14em; text-transform: uppercase; }
.hero-metrics strong { display: block; margin-top: 5px; color: var(--white); font-size: 14px; font-weight: 600; }
.hero-controls { position: absolute; left: 50%; bottom: 26px; z-index: 3; display: flex; align-items: center; justify-content: space-between; width: min(1200px, calc(100% - 48px)); transform: translateX(-50%); }
.hero-counter { color: rgba(255,255,255,.5); font-size: 11px; letter-spacing: .2em; }
.hero-dots { display: flex; gap: 6px; }
.hero-dot { width: 20px; height: 5px; padding: 0; border: 0; border-radius: 99px; background: rgba(255,255,255,.28); cursor: pointer; }
.hero-dot.is-active { width: 40px; background: var(--white); }
.hero-arrows { display: flex; gap: 8px; }
.hero-arrows button { width: 34px; height: 30px; border: 1px solid rgba(255,255,255,.28); border-radius: 6px; background: transparent; color: var(--white); cursor: pointer; font-size: 19px; }
@keyframes hero-kenburns {
  from { transform: scale(1.02); }
  to { transform: scale(1.12) translate3d(-1.2%, -1%, 0); }
}
@keyframes hero-copy-in {
  from { opacity: 0; transform: translateY(18px); }
  to { opacity: 1; transform: none; }
}
.hero-slide.is-active .hero-copy,
.hero-slide.is-active .hero-metrics { animation: hero-copy-in .85s ease both; }
.hero-slide.is-active .hero-metrics { animation-delay: .12s; }
@media (prefers-reduced-motion: reduce) {
  .hero-slide { transition: none; }
  .hero-slide.is-active .hero-bg img,
  .hero-slide.is-active .hero-copy,
  .hero-slide.is-active .hero-metrics { animation: none; }
}

.about-grid { display: grid; grid-template-columns: .95fr 1.05fr; gap: 56px; align-items: center; }
.about-grid h2 { color: var(--blue); }
.about-grid .rich-text { margin-top: 18px; color: var(--muted); font-size: 14px; }
.about-visual { position: relative; }
.about-media { height: 420px; overflow: hidden; border-radius: 12px; background: var(--blue-soft, #eaf3f9); }
.about-media > img, .about-media .image-placeholder.tall { width: 100%; height: 100%; object-fit: cover; border-radius: 0; transform: scale(1.06); will-change: transform; }
.about-visual > img, .about-img { width: 100%; height: 420px; object-fit: cover; border-radius: 12px; }
.stats-card { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; margin: -40px 18px 0; padding: 18px; border: 1px solid var(--line); border-radius: 12px; background: var(--white); box-shadow: var(--shadow); }
.stat-item { padding-left: 12px; border-left: 1px solid var(--line); }
.stat-item:first-child { padding-left: 0; border-left: 0; }
.stat-value { display: flex; align-items: baseline; gap: 3px; color: var(--blue); font-size: 27px; font-weight: 700; letter-spacing: -.04em; }
.stat-value small { font-size: 11px; font-weight: 500; }
.stat-item strong { display: block; margin-top: 2px; font-size: 12px; }
.stat-item > small { display: block; margin-top: 3px; color: var(--muted); font-size: 10px; }

.site-footer { background: linear-gradient(180deg, #0b4c77 0%, #083b5e 100%); color: var(--white); border-top: 1px solid rgba(255,255,255,.12); }
.footer-grid { display: grid; grid-template-columns: 1.45fr .7fr 1.15fr 1fr; gap: 40px 48px; padding-top: 54px; padding-bottom: 42px; align-items: start; }
.footer-block h4 { margin: 0 0 18px; color: var(--white); font-size: 15px; font-weight: 600; letter-spacing: 0; }
.footer-product-links { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 11px 26px; }
.footer-product-links a, .footer-links a { display: block; color: rgba(255,255,255,.78); font-size: 13px; line-height: 1.6; transition: color .18s ease; }
.footer-product-links a:hover, .footer-links a:hover { color: var(--white); }
.footer-links a + a { margin-top: 9px; }
.footer-kicker { margin: 0; color: rgba(255,255,255,.78); font-size: 14px; font-weight: 500; }
.footer-callback h4 { margin: 2px 0 0; color: var(--white); font-size: 21px; line-height: 1.35; letter-spacing: -.02em; }
.footer-callback-note { margin: 9px 0 14px; color: rgba(255,255,255,.76); font-size: 12px; line-height: 1.6; }
.footer-callback-form { display: flex; align-items: stretch; width: 100%; max-width: 430px; }
.footer-callback-form input { flex: 1 1 auto; min-width: 0; height: 44px; padding: 0 14px; border: 1px solid rgba(255,255,255,.22); border-radius: 0; background: rgba(255,255,255,.1); color: var(--white); font-size: 13px; outline: none; }
.footer-callback-form input::placeholder { color: rgba(255,255,255,.68); }
.footer-callback-form input:focus { border-color: rgba(255,255,255,.65); background: rgba(255,255,255,.16); box-shadow: 0 0 0 3px rgba(255,255,255,.12); }
.footer-callback-form button { flex: 0 0 auto; height: 44px; padding: 0 18px; border: 0; border-radius: 0; background: var(--white); color: var(--blue); font-size: 13px; font-weight: 600; cursor: pointer; }
.footer-callback-form button:hover { background: var(--blue-soft); }
.footer-hotline span { display: block; color: rgba(255,255,255,.76); font-size: 13px; }
.footer-hotline a { display: block; margin-top: 6px; color: var(--white); font-size: clamp(28px, 2.7vw, 38px); font-weight: 700; line-height: 1.1; letter-spacing: -.035em; white-space: nowrap; }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 16px; padding-bottom: 18px; border-top: 1px solid rgba(255,255,255,.16); color: rgba(255,255,255,.78); font-size: 11px; }
.back-to-top {
  position: fixed; right: 30px; bottom: 30px; z-index: 40;
  display: grid; place-items: center; width: 46px; height: 46px;
  border: 1px solid var(--line); border-radius: 50%;
  background: rgba(255,255,255,.96); color: var(--muted);
  box-shadow: 0 10px 24px rgba(16,24,32,.12);
  cursor: pointer; opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: opacity .2s ease, visibility .2s ease, transform .2s ease, color .2s ease, border-color .2s ease;
}
.back-to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.back-to-top:hover { color: var(--blue); border-color: #b9d3e3; }
.back-to-top:focus-visible { outline: 2px solid var(--blue-2); outline-offset: 2px; }
.empty-state { padding: 42px; border: 1px dashed var(--line); border-radius: 12px; color: var(--muted); text-align: center; font-size: 14px; }