:root {
  --navy: #0a304e;
  --navy-deep: #061f33;
  --cyan: #10aebf;
  --cyan-soft: #dff7fa;
  --ink: #173142;
  --muted: #627987;
  --line: #d8e3e8;
  --paper: #ffffff;
  --surface: #f4f8fa;
  --max-width: 1180px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.container { width: min(calc(100% - 40px), var(--max-width)); margin: 0 auto; }

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  background: rgba(255,255,255,.96);
  border-bottom: 1px solid rgba(10,48,78,.1);
  backdrop-filter: blur(16px);
}
.header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 30px; }
.brand { display: flex; align-items: center; gap: 16px; }
.brand img { width: 108px; height: 34px; object-fit: contain; }
.brand span { display: grid; line-height: 1.25; }
.brand strong { color: var(--navy); font-size: 17px; letter-spacing: .4px; }
.brand small { margin-top: 4px; color: var(--muted); font-size: 8px; letter-spacing: .55px; }
.main-nav { display: flex; gap: 30px; color: #345061; font-size: 14px; }
.main-nav a { padding: 25px 0 23px; border-bottom: 2px solid transparent; }
.main-nav a:hover { color: var(--navy); border-color: var(--cyan); }
.main-nav .language-link { align-self: center; margin-left: -6px; padding: 8px 12px; border: 1px solid var(--line); border-radius: 999px; color: var(--navy); font-size: 12px; font-weight: 700; line-height: 1; }
.main-nav .language-link:hover { border-color: var(--cyan); background: var(--cyan-soft); }
.menu-button { display: none; border: 1px solid var(--line); background: white; color: var(--navy); padding: 8px 12px; border-radius: 6px; }

html[lang="en"] body { font-family: "Segoe UI", Arial, sans-serif; }
html[lang="en"] .brand strong { max-width: 340px; font-size: 14px; }
html[lang="en"] .brand small { font-size: 9px; }

.hero {
  overflow: hidden;
  color: white;
  background:
    radial-gradient(circle at 78% 15%, rgba(16,174,191,.28), transparent 29%),
    linear-gradient(128deg, #061e31 0%, #0a304e 58%, #0b4259 100%);
}
.hero-grid { min-height: 610px; display: grid; grid-template-columns: 1.25fr .75fr; align-items: center; gap: 70px; }
.eyebrow { margin: 0 0 14px; color: #6ee7ee; font-size: 12px; font-weight: 700; letter-spacing: 1.8px; }
.eyebrow.dark { color: #0e94a4; }
.hero h1 { margin: 0; font-size: clamp(38px, 5vw, 66px); line-height: 1.2; letter-spacing: -1px; }
.hero-text { max-width: 650px; margin: 26px 0 34px; color: #c5d6df; font-size: 18px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.button { display: inline-flex; min-height: 46px; align-items: center; justify-content: center; padding: 0 24px; border-radius: 4px; font-weight: 700; }
.button.primary { color: #05263a; background: #68e2e9; }
.button.secondary { color: white; border: 1px solid rgba(255,255,255,.42); }

.control-card { position: relative; padding: 28px; border: 1px solid rgba(117,226,234,.35); background: rgba(1,20,33,.52); box-shadow: 0 32px 70px rgba(0,0,0,.2); }
.control-card::before { position: absolute; inset: 10px; border: 1px solid rgba(255,255,255,.06); content: ""; pointer-events: none; }
.control-card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 22px; color: #77e5eb; font-size: 11px; letter-spacing: 1.5px; }
.control-card-head i { width: 9px; height: 9px; border-radius: 50%; background: #77e5eb; box-shadow: 0 0 16px #77e5eb; }
.metric { display: grid; grid-template-columns: 86px 1fr; align-items: center; padding: 14px 0; border-top: 1px solid rgba(255,255,255,.12); }
.metric strong { color: white; font-size: 18px; }
.metric span { color: #acc2cd; font-size: 13px; line-height: 1.5; }
.signal { height: 58px; display: flex; align-items: flex-end; gap: 9px; margin-top: 20px; }
.signal span { flex: 1; background: linear-gradient(#68e2e9, rgba(104,226,233,.16)); }
.signal span:nth-child(1) { height: 35%; }
.signal span:nth-child(2) { height: 66%; }
.signal span:nth-child(3) { height: 48%; }
.signal span:nth-child(4) { height: 86%; }
.signal span:nth-child(5) { height: 72%; }

.section { padding: 100px 0; }
.section-heading { max-width: 720px; margin-bottom: 46px; }
.section-heading p { margin: 0 0 6px; color: #0e94a4; font-size: 12px; font-weight: 700; letter-spacing: 1.6px; }
.section-heading h2, .section h2, .contact-section h2 { margin: 0 0 14px; color: var(--navy); font-size: clamp(30px, 4vw, 46px); line-height: 1.25; }
.section-heading span { color: var(--muted); }
.cards { display: grid; gap: 18px; }
.four-columns { grid-template-columns: repeat(4, 1fr); }
.service-card { min-height: 360px; overflow: hidden; border: 1px solid var(--line); background: white; transition: transform .2s ease, box-shadow .2s ease; }
.service-card:hover { transform: translateY(-5px); box-shadow: 0 18px 42px rgba(27,61,78,.1); }
.service-card-media { aspect-ratio: 3 / 2; overflow: hidden; margin: 0; border-bottom: 1px solid var(--line); background: #e9eef1; }
.service-card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
.service-card:hover .service-card-media img { transform: scale(1.025); }
.service-card-body { padding: 30px 25px; }
.service-card.has-media .service-card-body { padding-top: 22px; }
.service-card b { color: var(--cyan); font-size: 13px; }
.service-card h3 { margin: 48px 0 12px; color: var(--navy); font-size: 20px; }
.service-card.has-media h3 { margin-top: 18px; }
.service-card p { margin: 0; color: var(--muted); font-size: 14px; }

.section-dark { color: white; background: var(--navy-deep); }
.section-dark h2 { color: white; }
.solution-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 100px; align-items: start; }
.solution-grid > div > p:last-child { color: #a9beca; }
.steps { margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.16); }
.steps li { display: grid; grid-template-columns: 70px 1fr; gap: 18px; padding: 21px 0; border-bottom: 1px solid rgba(255,255,255,.16); }
.steps span { color: #64dce4; font-size: 12px; }
.steps strong { font-size: 17px; }
.steps p { margin: 2px 0 0; color: #9fb5c1; font-size: 14px; }

.about-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 100px; }
.about-copy { color: #536c7a; font-size: 17px; }
.draft-note { padding: 18px 20px; border-left: 3px solid var(--cyan); background: var(--surface); font-size: 14px; }

.contact-section { padding: 90px 0; color: white; background: linear-gradient(125deg, #0a304e, #0b4d64); }
.contact-section h2 { color: white; }
.contact-section p { color: #c2d5de; }
.contact-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 100px; align-items: center; }
.contact-details { border-top: 1px solid rgba(255,255,255,.23); }
.contact-details a, .contact-details > p { display: grid; grid-template-columns: 82px 1fr; gap: 18px; margin: 0; padding: 18px 0; border-bottom: 1px solid rgba(255,255,255,.23); }
.contact-details span { color: #71dfe6; font-size: 13px; }
.contact-details strong { color: white; font-size: 15px; font-weight: 500; }

.site-footer { color: #8aa0ad; background: #041522; }
.footer-inner { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 20px; font-size: 12px; }
.filing { color: #708895; }
.filing a { color: #9db2bd; }
.filing a:hover { color: #71dfe6; }

@media (max-width: 900px) {
  .brand small { display: none; }
  .menu-button { display: block; }
  .main-nav { position: absolute; top: 76px; right: 20px; left: 20px; display: none; flex-direction: column; gap: 0; padding: 8px 18px; border: 1px solid var(--line); background: white; box-shadow: 0 18px 40px rgba(0,0,0,.12); }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 0; }
  .main-nav .language-link { align-self: flex-start; margin: 8px 0; padding: 8px 12px; }
  .hero-grid, .solution-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 46px; }
  .hero-grid { padding: 80px 0; }
  .control-card { max-width: 560px; }
  .four-columns { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 600px) {
  .container { width: min(calc(100% - 28px), var(--max-width)); }
  .header-inner { min-height: 68px; gap: 12px; }
  .brand { min-width: 0; gap: 10px; }
  .brand span { min-width: 0; }
  .brand img { width: 84px; }
  .brand strong { font-size: 14px; }
  .menu-button { flex: 0 0 auto; }
  html[lang="en"] .brand img { width: 70px; }
  html[lang="en"] .brand strong { max-width: 170px; font-size: 11px; }
  .hero h1 { font-size: 38px; }
  .hero-text { font-size: 16px; }
  .section { padding: 72px 0; }
  .four-columns { grid-template-columns: 1fr; }
  .service-card { min-height: 220px; }
  .service-card-media { aspect-ratio: 16 / 10; }
  .service-card h3 { margin-top: 35px; }
  .footer-inner { flex-direction: column; justify-content: center; text-align: center; }
}