:root {
  --ink: #102c49;
  --ink-muted: #536c82;
  --navy: #102e4b;
  --accent: #2e9dca;
  --line: #d8e6ee;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-family: "Segoe UI", "Helvetica Neue", Arial, "Noto Sans SC", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3 { overflow-wrap: anywhere; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
::selection { color: #0d2c47; background: #a9e1f4; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 5px; }

.shell { width: min(calc(100% - 112px), 1280px); margin-inline: auto; }
.skip-link {
  position: absolute;
  top: -80px;
  left: 20px;
  z-index: 100;
  padding: 10px 14px;
  color: #fff;
  background: var(--navy);
  border-radius: 4px;
}
.skip-link:focus { top: 16px; }

.site-header {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  z-index: 10;
  background: transparent;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 100px;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  white-space: nowrap;
  font-size: 1.29rem;
  font-weight: 750;
  letter-spacing: 0.015em;
}
.brand-wordmark {
  display: flex;
  flex-direction: column;
  gap: 4px;
  line-height: 1;
}
.brand-wordmark small {
  color: #477891;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.brand-icon {
  position: relative;
  display: block;
  flex: 0 0 42px;
  width: 42px;
  height: 42px;
  overflow: hidden;
}
.brand-icon img {
  position: absolute;
  top: -6px;
  left: -6px;
  width: 54px;
  height: 54px;
  max-width: none;
}
.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  white-space: nowrap;
  color: #7690a4;
  font-size: 0.87rem;
  font-weight: 650;
  letter-spacing: 0.02em;
}
.language-switch a {
  padding: 7px 0 5px;
  border-bottom: 2px solid transparent;
  color: #5b7187;
  transition: color 160ms ease, border-color 160ms ease;
}
.language-switch a:hover { color: var(--navy); }
.language-switch a[aria-current="page"] {
  border-color: var(--accent);
  color: var(--navy);
}

.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  min-height: clamp(660px, 79vh, 820px);
  background: linear-gradient(110deg, #fff 0%, #f5fbff 46%, #e8f5fc 100%);
}
.hero-art {
  position: absolute;
  z-index: -1;
  top: 0;
  right: 0;
  width: 61%;
  height: 100%;
  object-fit: cover;
  object-position: 32% center;
  -webkit-mask-image: linear-gradient(to right, transparent 0%, #000 19%);
  mask-image: linear-gradient(to right, transparent 0%, #000 19%);
}
.hero-inner {
  display: flex;
  align-items: center;
  min-height: clamp(660px, 79vh, 820px);
  padding-block: 130px 80px;
}
.hero-copy { position: relative; width: min(56%, 650px); }
.eyebrow {
  display: flex;
  align-items: center;
  gap: 15px;
  margin: 0 0 31px;
  color: #257da5;
  font-size: 0.83rem;
  font-weight: 750;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}
.eyebrow::before {
  display: block;
  flex: 0 0 34px;
  width: 34px;
  height: 2px;
  background: var(--accent);
  content: "";
}
.hero h1 {
  max-width: 660px;
  margin: 0;
  font-size: clamp(3.5rem, 5.05vw, 5.35rem);
  font-weight: 720;
  letter-spacing: -0.06em;
  line-height: 1.095;
  text-wrap: balance;
}
html[lang="zh-CN"] .hero h1 {
  font-size: clamp(3.45rem, 4.8vw, 4.9rem);
  letter-spacing: -0.075em;
  line-height: 1.23;
}
.hero-lead {
  max-width: 550px;
  margin: 29px 0 0;
  color: #4e687e;
  font-size: clamp(1.05rem, 1.35vw, 1.18rem);
  line-height: 1.85;
}
.hero-accent {
  display: block;
  width: 75px;
  height: 4px;
  margin-top: 43px;
  background: linear-gradient(90deg, var(--accent), #a5e3f5);
}

.capabilities {
  padding-block: 106px 126px;
  background: #fff;
}
.section-intro {
  display: grid;
  grid-template-columns: 1fr minmax(260px, 390px);
  align-items: end;
  gap: 55px;
}
.section-index {
  margin: 0 0 17px;
  color: #2f89ae;
  font-size: 0.82rem;
  font-weight: 750;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}
.section-intro h2 {
  margin: 0;
  font-size: clamp(2.8rem, 4.1vw, 4.2rem);
  font-weight: 690;
  letter-spacing: -0.055em;
  line-height: 1.12;
}
.title-dot { color: var(--accent); }
.section-intro > p {
  max-width: 390px;
  margin: 0 0 5px;
  color: var(--ink-muted);
  font-size: 1.01rem;
  line-height: 1.8;
}
.capability-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 42px;
  margin-top: 66px;
}
.capability {
  min-width: 0;
  min-height: 260px;
  padding-top: 22px;
  border-top: 1px solid #adc9d9;
}
.capability-number {
  display: block;
  color: #448db0;
  font-size: 0.84rem;
  font-weight: 750;
  letter-spacing: 0.08em;
}
.capability h3 {
  max-width: 340px;
  margin: 52px 0 14px;
  font-size: clamp(1.3rem, 1.7vw, 1.58rem);
  font-weight: 690;
  letter-spacing: -0.028em;
  line-height: 1.35;
}
.capability p {
  max-width: 320px;
  margin: 0;
  color: var(--ink-muted);
  font-size: 0.99rem;
  line-height: 1.8;
}

.site-footer {
  color: #dce9f1;
  background: #102b46;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.1fr 1.5fr auto;
  align-items: center;
  gap: 42px;
  min-height: 136px;
}
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  color: #fff;
  font-size: 1.1rem;
  font-weight: 750;
}
.footer-brand span {
  color: #aec4d3;
  font-size: 0.79rem;
  font-weight: 400;
  letter-spacing: 0.01em;
}
.footer-inner p {
  max-width: 440px;
  margin: 0;
  color: #c6d9e5;
  font-size: 0.88rem;
  line-height: 1.65;
}
.footer-inner small {
  color: #9bb8ca;
  font-size: 0.79rem;
  white-space: nowrap;
}

@media (max-width: 1050px) {
  .shell { width: min(calc(100% - 76px), 1280px); }
  .hero-copy { width: min(61%, 650px); }
  .hero-art { width: 65%; object-position: 29% center; }
  .capability-grid { gap: 26px; }
}

@media (max-width: 720px) {
  .shell { width: min(calc(100% - 40px), 1280px); }
  .header-inner { flex-wrap: wrap; min-height: 79px; row-gap: 10px; padding-block: 14px; }
  .brand { gap: 8px; font-size: 1.1rem; }
  .brand-icon { flex-basis: 34px; width: 34px; height: 34px; }
  .brand-icon img { top: -5px; left: -5px; width: 44px; height: 44px; }
  .language-switch { gap: 9px; font-size: 0.8rem; }
  .hero { min-height: 790px; }
  .hero-inner {
    display: block;
    min-height: 790px;
    padding-block: max(155px, 9.7rem) 350px;
  }
  .hero-copy { width: 100%; }
  .eyebrow { gap: 11px; margin-bottom: 22px; font-size: 0.72rem; letter-spacing: 0.12em; }
  .eyebrow::before { flex-basis: 25px; width: 25px; }
  .hero h1 { max-width: 11ch; font-size: clamp(2.75rem, 10vw, 4.2rem); line-height: 1.11; }
  html[lang="zh-CN"] .hero h1 { max-width: none; font-size: clamp(2.6rem, 9.7vw, 3.6rem); line-height: 1.26; }
  .hero-lead { max-width: 560px; margin-top: 21px; font-size: 1rem; line-height: 1.75; }
  .hero-accent { width: 55px; height: 3px; margin-top: 27px; }
  .hero-art {
    top: auto;
    right: 0;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 345px;
    object-position: 29% 50%;
    -webkit-mask-image: linear-gradient(to bottom, transparent 0%, #000 23%);
    mask-image: linear-gradient(to bottom, transparent 0%, #000 23%);
  }
  .capabilities { padding-block: 77px 85px; }
  .section-intro { display: block; }
  .section-index { margin-bottom: 12px; font-size: 0.72rem; }
  .section-intro h2 { font-size: clamp(2.6rem, 10vw, 3.7rem); }
  .section-intro > p { max-width: 520px; margin-top: 21px; font-size: 0.96rem; }
  .capability-grid { display: block; margin-top: 46px; }
  .capability { min-height: 0; padding: 22px 0 37px; }
  .capability + .capability { margin-top: 5px; }
  .capability h3 { max-width: none; margin: 27px 0 9px; font-size: 1.35rem; }
  .capability p { max-width: 550px; font-size: 0.95rem; }
  .footer-inner {
    display: block;
    min-height: 0;
    padding-block: 37px 35px;
  }
  .footer-inner p { max-width: 500px; margin-top: 21px; }
  .footer-inner small { display: block; margin-top: 25px; }
}

@media (max-width: 375px) {
  .hero { min-height: 820px; }
  .hero-inner { min-height: 820px; padding-top: 145px; }
  .hero h1 { font-size: 2.7rem; }
  html[lang="zh-CN"] .hero h1 { font-size: 2.52rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}