:root {
  --navy: #061c45;
  --navy-2: #0a2e66;
  --blue: #0777df;
  --blue-bright: #21a0ff;
  --ink: #0b1a32;
  --muted: #5f6f86;
  --line: #dce5f0;
  --wash: #f3f7fc;
  --white: #ffffff;
  --max: 1200px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  font-family: Inter, "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

button { font: inherit; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  min-height: 82px;
  display: grid;
  grid-template-columns: 280px 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 10px max(28px, calc((100vw - var(--max)) / 2));
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(220, 229, 240, 0.8);
  backdrop-filter: blur(16px);
}

.brand { display: inline-flex; align-items: center; width: fit-content; }

.brand-frame {
  width: 250px;
  height: 62px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-frame img {
  display: block;
  width: 250px;
  height: auto;
}

.main-nav {
  display: flex;
  justify-content: center;
  gap: clamp(20px, 3vw, 40px);
}

.main-nav a {
  position: relative;
  color: #32435c;
  font-size: 0.9rem;
  font-weight: 600;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: -9px;
  height: 2px;
  background: var(--blue);
  transition: right 180ms ease;
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after { right: 0; }

.language-switch {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 6px 10px;
  color: #93a0b1;
  border: 1px solid var(--line);
  border-radius: 999px;
}

.lang-button {
  min-width: 30px;
  padding: 2px 3px;
  color: #7b899c;
  background: transparent;
  border: 0;
  border-radius: 12px;
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 700;
}

.lang-button.active { color: var(--navy); }
.lang-button:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; }

.hero {
  min-height: 680px;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(420px, 0.95fr);
  align-items: center;
  gap: clamp(40px, 7vw, 110px);
  max-width: var(--max);
  margin: 0 auto;
  padding: 72px 28px 84px;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--blue);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.17em;
}

h1, h2, h3, p { margin-top: 0; }

h1 {
  max-width: 720px;
  margin-bottom: 28px;
  color: var(--navy);
  font-size: clamp(2.6rem, 5.6vw, 5.2rem);
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.hero-copy {
  max-width: 610px;
  margin-bottom: 34px;
  color: var(--muted);
  font-size: clamp(1.05rem, 1.7vw, 1.28rem);
}

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

.button {
  min-height: 50px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: 4px;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover { transform: translateY(-2px); }
.button:focus-visible { outline: 3px solid rgba(33, 160, 255, 0.35); outline-offset: 3px; }

.button-primary {
  color: var(--white);
  background: linear-gradient(135deg, var(--navy-2), var(--blue));
  box-shadow: 0 14px 32px rgba(5, 66, 135, 0.2);
}

.button-secondary {
  color: var(--navy);
  background: var(--white);
  border: 1px solid var(--line);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 54px;
  color: #7a899d;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.hero-meta span:not(:last-child)::after {
  content: "";
  display: inline-block;
  width: 3px;
  height: 3px;
  margin-left: 24px;
  vertical-align: middle;
  background: var(--blue);
  border-radius: 50%;
}

.hero-visual {
  position: relative;
  height: 500px;
  overflow: hidden;
  background: linear-gradient(145deg, #061b40, #0a3472 65%, #086ec5);
  border-radius: 6px 56px 6px 6px;
  box-shadow: 0 34px 70px rgba(6, 28, 69, 0.26);
}

.visual-grid {
  position: absolute;
  inset: 0;
  opacity: 0.22;
  background-image: linear-gradient(rgba(255,255,255,.15) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.15) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(to bottom right, black, transparent 78%);
}

.orbit {
  position: absolute;
  border: 1px solid rgba(80, 190, 255, 0.48);
  border-radius: 50%;
}

.orbit-one { width: 370px; height: 370px; top: 58px; left: 76px; }
.orbit-two { width: 245px; height: 245px; top: 120px; left: 138px; border-style: dashed; }

.signal-line {
  position: absolute;
  height: 2px;
  transform-origin: left center;
  background: linear-gradient(90deg, transparent, #36b7ff, transparent);
}

.signal-one { width: 470px; top: 122px; left: 22px; transform: rotate(31deg); }
.signal-two { width: 420px; bottom: 116px; left: 58px; transform: rotate(-24deg); }

.visual-core {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 170px;
  height: 170px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transform: translate(-50%, -50%);
  color: var(--white);
  background: radial-gradient(circle at 34% 30%, #24aaff, #0866bc 48%, #072451 76%);
  border: 1px solid rgba(255,255,255,.4);
  border-radius: 50%;
  box-shadow: 0 0 0 18px rgba(35, 157, 244, 0.07), 0 0 70px rgba(21, 154, 242, 0.45);
}

.visual-core span { font-size: 1.65rem; font-weight: 800; letter-spacing: 0.12em; }
.visual-core small { margin-top: 2px; color: #9ed9ff; font-size: 0.64rem; letter-spacing: 0.3em; }

.visual-label {
  position: absolute;
  padding: 6px 9px;
  color: rgba(255,255,255,.8);
  background: rgba(5, 29, 68, 0.7);
  border-left: 2px solid #27a8ff;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.09em;
}

.label-a { top: 72px; right: 22px; }
.label-b { left: 28px; bottom: 82px; }
.label-c { right: 36px; bottom: 54px; }

.section { max-width: var(--max); margin: 0 auto; padding: 96px 28px; }

.section-heading { display: grid; grid-template-columns: minmax(210px, .65fr) 1.3fr; gap: 0 60px; align-items: start; }
.section-heading .eyebrow { grid-row: 1 / span 2; }

h2 {
  margin-bottom: 18px;
  color: var(--navy);
  font-size: clamp(2rem, 3.8vw, 3.25rem);
  line-height: 1.15;
  letter-spacing: -0.035em;
}

.section-heading > p:last-child { max-width: 680px; color: var(--muted); font-size: 1.05rem; }

.service-grid { display: grid; grid-template-columns: repeat(2, 1fr); margin-top: 52px; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }

.service-card {
  min-height: 260px;
  padding: 32px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  transition: background 180ms ease, transform 180ms ease;
}

.service-card:hover { background: var(--wash); transform: translateY(-2px); }
.card-number { color: var(--blue); font-size: .75rem; font-weight: 800; letter-spacing: .15em; }
.service-card h3 { margin: 50px 0 12px; color: var(--navy); font-size: 1.35rem; }
.service-card p { max-width: 490px; margin-bottom: 0; color: var(--muted); }

.approach { max-width: none; padding: 24px 28px; background: var(--wash); }

.approach-panel {
  max-width: var(--max);
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 70px;
  margin: 0 auto;
  padding: 82px 72px;
  color: var(--white);
  background: linear-gradient(145deg, var(--navy), #092e68);
  border-radius: 6px;
}

.section-heading-light { display: block; }
.section-heading-light h2 { color: var(--white); }
.section-heading-light > p:last-child { color: #bbcae0; }

.process-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid rgba(255,255,255,.18); }

.process-list li {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 18px;
  padding: 26px 0;
  border-bottom: 1px solid rgba(255,255,255,.18);
}

.process-list > li > span { color: #56b9ff; font-size: .75rem; font-weight: 800; }
.process-list h3 { margin-bottom: 5px; font-size: 1.16rem; }
.process-list p { margin: 0; color: #b9c9df; }

.about { display: grid; grid-template-columns: .68fr 1.32fr; gap: 80px; align-items: center; }

.about-mark {
  height: 410px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  color: transparent;
  background: linear-gradient(145deg, #edf5ff, #d7ebff);
  border-radius: 60px 6px 6px 6px;
  -webkit-text-stroke: 2px rgba(7, 119, 223, 0.22);
  font-size: 22rem;
  font-weight: 900;
  line-height: 1;
}

.about-copy > p:not(.eyebrow) { color: var(--muted); font-size: 1.04rem; }

.values { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 32px; }
.values span { padding: 8px 13px; color: var(--navy); background: var(--wash); border: 1px solid var(--line); border-radius: 3px; font-size: .78rem; font-weight: 700; }

.contact {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 80px;
  margin-bottom: 56px;
  color: var(--white);
  background: linear-gradient(120deg, #071d44, #0b438a);
  border-radius: 6px;
}

.contact h2 { color: var(--white); }
.contact-intro > p:last-child { color: #c1cfe2; }
.contact-details { display: grid; }

.contact-details a,
.contact-details > div {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(255,255,255,.2);
}

.contact-details span { color: #a9bdd6; font-size: .86rem; }
.contact-details strong { text-align: right; font-size: 1.02rem; }
.contact-details a:hover strong { color: #73caff; }

.site-footer {
  max-width: var(--max);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 30px;
  margin: 0 auto;
  padding: 32px 28px 42px;
  color: #78879b;
  border-top: 1px solid var(--line);
  font-size: .82rem;
}

.site-footer div { display: flex; flex-direction: column; }
.site-footer strong { color: var(--navy); font-size: .9rem; }
.site-footer p { margin: 0; }

@media (max-width: 940px) {
  .site-header { grid-template-columns: 1fr auto; }
  .main-nav { display: none; }
  .hero { grid-template-columns: 1fr; min-height: 0; padding-top: 52px; }
  .hero-visual { height: 410px; }
  .section-heading { grid-template-columns: 1fr; }
  .section-heading .eyebrow { grid-row: auto; }
  .approach-panel, .about, .contact { grid-template-columns: 1fr; }
  .approach-panel { padding: 64px 42px; }
  .about-mark { height: 300px; }
}

@media (max-width: 620px) {
  .site-header { min-height: 70px; padding: 8px 18px; gap: 8px; }
  .brand-frame { width: 180px; height: 48px; }
  .brand-frame img { width: 180px; }
  .language-switch { padding: 4px 6px; }
  .hero { padding: 44px 20px 66px; }
  h1 { font-size: clamp(2.35rem, 13vw, 3.6rem); }
  .hero-meta span:not(:last-child)::after { display: none; }
  .hero-visual { height: 340px; border-radius: 5px 34px 5px 5px; }
  .orbit-one { width: 270px; height: 270px; top: 34px; left: calc(50% - 135px); }
  .orbit-two { width: 184px; height: 184px; top: 77px; left: calc(50% - 92px); }
  .visual-core { width: 132px; height: 132px; }
  .visual-core span { font-size: 1.25rem; }
  .visual-label { font-size: .53rem; }
  .section { padding: 74px 20px; }
  .service-grid { grid-template-columns: 1fr; }
  .service-card { min-height: 225px; padding: 26px; }
  .service-card h3 { margin-top: 34px; }
  .approach { padding: 14px; }
  .approach-panel { gap: 38px; padding: 48px 24px; }
  .about { gap: 42px; }
  .about-mark { height: 230px; font-size: 15rem; }
  .contact { gap: 34px; margin: 0 14px 40px; padding: 54px 24px; }
  .contact-details a, .contact-details > div { align-items: flex-start; flex-direction: column; gap: 3px; }
  .contact-details strong { text-align: left; }
  .site-footer { align-items: flex-start; flex-direction: column; padding: 28px 20px 36px; }
}

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