*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}

:root{
  --ink:#122033;
  --muted:#66758a;
  --blue:#155f9f;
  --blue-dark:#0b3157;
  --line:#dce4ec;
  --bg:#f6f9fc;
  --white:#fff;
  --accent:#d7a84f;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
}

html{scroll-behavior:smooth}
body{min-width:320px}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}

.site-header{
  position:sticky;
  top:0;
  z-index:20;
  min-height:72px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  padding:14px clamp(18px,5vw,72px);
  background:rgba(255,255,255,.94);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(14px);
}

.brand{
  display:flex;
  flex-direction:column;
  line-height:1.05;
  letter-spacing:.02em;
  font-weight:900;
  color:var(--blue-dark);
}

.brand span{font-size:1.06rem}
.brand small{
  margin-top:3px;
  color:var(--muted);
  font-size:.68rem;
  font-weight:800;
  letter-spacing:.12em;
  text-transform:uppercase;
}

.nav{
  display:flex;
  align-items:center;
  gap:24px;
  color:#304158;
  font-size:.86rem;
  font-weight:750;
}

.nav a:hover{color:var(--blue)}

.language-control{
  display:flex;
  align-items:center;
  gap:8px;
  margin-left:auto;
}

.language-control label{
  color:var(--muted);
  font-size:.72rem;
  font-weight:850;
  letter-spacing:.08em;
  text-transform:uppercase;
}

.language-control select{
  min-height:34px;
  padding:5px 28px 5px 10px;
  border:1px solid var(--line);
  border-radius:3px;
  background:#fff;
  color:var(--ink);
  font:inherit;
  font-size:.82rem;
  font-weight:750;
}

.hero{
  position:relative;
  min-height:calc(100vh - 72px);
  display:flex;
  align-items:flex-end;
  overflow:hidden;
}

.hero>img{
  position:absolute;
  inset:0;
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center;
}

.hero-shade{
  position:absolute;
  inset:0;
  background:
    linear-gradient(90deg,rgba(8,25,45,.84),rgba(8,25,45,.58) 42%,rgba(8,25,45,.14)),
    linear-gradient(0deg,rgba(8,25,45,.76),rgba(8,25,45,0) 55%);
}

.hero-copy{
  position:relative;
  z-index:1;
  width:min(760px,100%);
  padding:clamp(72px,12vw,128px) clamp(20px,6vw,84px);
  color:var(--white);
}

.eyebrow{
  margin-bottom:14px;
  color:var(--accent);
  font-size:.72rem;
  font-weight:900;
  letter-spacing:.16em;
  text-transform:uppercase;
}

.hero h1{
  max-width:720px;
  font-size:clamp(2.5rem,6vw,5.6rem);
  line-height:.96;
  font-weight:900;
  letter-spacing:0;
}

:lang(zh-CN) .hero h1{
  max-width:1120px;
  font-size:clamp(2.1rem,4.2vw,4.25rem);
  line-height:1.08;
}

:lang(zh-CN) .hero-copy{
  width:min(1180px,100%);
}

.hero p:not(.eyebrow){
  max-width:600px;
  margin-top:24px;
  color:rgba(255,255,255,.84);
  font-size:1.05rem;
}

.hero-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:32px;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:0 22px;
  border:1px solid rgba(255,255,255,.42);
  font-size:.86rem;
  font-weight:850;
  letter-spacing:.04em;
}

.btn.primary{
  background:var(--accent);
  border-color:var(--accent);
  color:#17202b;
}

.btn.secondary{color:#fff}

.section{
  padding:clamp(64px,9vw,118px) clamp(20px,6vw,84px);
}

.intro{
  display:grid;
  grid-template-columns:minmax(260px,.7fr) minmax(300px,1fr);
  gap:clamp(28px,6vw,84px);
  background:#fff;
}

.section h2,
.experience h2{
  max-width:720px;
  font-size:clamp(1.9rem,4vw,3.7rem);
  line-height:1.02;
  font-weight:900;
  letter-spacing:0;
  color:var(--blue-dark);
}

:lang(zh-CN) .section h2,
:lang(zh-CN) .experience h2{
  font-size:clamp(1.7rem,3.25vw,3rem);
  line-height:1.1;
}

.intro-copy{
  display:grid;
  gap:18px;
  color:#34465d;
  font-size:1.02rem;
}

.section-head{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap:32px;
  margin-bottom:34px;
}

.network-band{
  color:#fff;
  background:var(--blue-dark);
}

.network-band h2{color:#fff}

.network-grid,
.service-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:1px;
  background:rgba(255,255,255,.18);
  border:1px solid rgba(255,255,255,.18);
}

.network-grid article{
  min-height:230px;
  padding:30px;
  background:#123e68;
}

.network-grid strong,
.service-grid h3{
  display:block;
  margin-bottom:14px;
  font-size:1.06rem;
  font-weight:900;
}

.network-grid p{color:rgba(255,255,255,.78)}

.services{background:#f6f9fc}

.service-grid{
  grid-template-columns:repeat(3,1fr);
  background:var(--line);
  border:1px solid var(--line);
}

.service-grid article{
  min-height:230px;
  padding:30px;
  background:#fff;
}

.service-grid p{color:var(--muted)}

.experience{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  min-height:620px;
  background:#fff;
}

.experience>img{
  width:100%;
  height:100%;
  object-fit:cover;
  object-position:center;
}

.experience-copy{
  display:flex;
  flex-direction:column;
  justify-content:center;
  padding:clamp(56px,8vw,100px) clamp(22px,6vw,76px);
}

.experience-copy p:not(.eyebrow){
  margin-top:22px;
  color:#34465d;
}

.experience-copy ul{
  margin-top:24px;
  padding-left:18px;
  color:#34465d;
}

.experience-copy li{margin-bottom:8px}

.contact{
  display:grid;
  grid-template-columns:minmax(280px,1fr) minmax(280px,420px);
  gap:40px;
  align-items:center;
  background:#eef4f9;
}

.contact p:not(.eyebrow){
  max-width:620px;
  margin-top:18px;
  color:var(--muted);
}

.contact-panel{
  display:grid;
  gap:12px;
  padding:30px;
  background:#fff;
  border:1px solid var(--line);
}

.contact-panel strong{
  font-size:1.05rem;
  color:var(--blue-dark);
}

.contact-panel a{
  width:fit-content;
  color:var(--blue);
  font-weight:850;
  border-bottom:1px solid currentColor;
}

.contact-panel span{color:var(--muted)}

.site-footer{
  display:flex;
  justify-content:space-between;
  gap:20px;
  padding:24px clamp(20px,6vw,84px);
  background:#071c31;
  color:rgba(255,255,255,.72);
  font-size:.82rem;
}

@media(max-width:860px){
  .site-header{
    align-items:flex-start;
    flex-direction:column;
    gap:12px;
  }
  .nav{
    width:100%;
    overflow-x:auto;
    gap:18px;
    padding-bottom:3px;
  }
  .nav a{flex:0 0 auto}
  .language-control{
    width:100%;
    margin-left:0;
  }
  .hero{min-height:calc(100vh - 118px)}
  .intro,
  .experience,
  .contact{
    grid-template-columns:1fr;
  }
  .experience>img{
    height:340px;
  }
  .network-grid,
  .service-grid{
    grid-template-columns:1fr;
  }
  .network-grid article,
  .service-grid article{
    min-height:auto;
  }
  .section-head{
    display:block;
  }
  .site-footer{
    flex-direction:column;
  }
}

@media(max-width:560px){
  .hero-copy{
    padding-bottom:64px;
  }
  .hero h1{
    font-size:2.45rem;
  }
  .btn{
    width:100%;
  }
}