:root {
  --brand: #164f9f;
  --ink: #17202a;
  --muted: #667085;
  --line: #dce3ec;
  --soft: #f5f7fa;
  --white: #ffffff;
}

* {
  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: 1.7;
}

img {
  display: block;
  width: 100%;
}

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

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(18px, 4vw, 64px);
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid rgba(220, 227, 236, 0.9);
  backdrop-filter: blur(12px);
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
}

.brand-en {
  color: var(--brand);
  font-size: 32px;
  font-style: italic;
  font-weight: 700;
  line-height: 1;
}

.brand-cn {
  color: #8b929c;
  font-size: 20px;
  font-weight: 600;
}

nav {
  display: flex;
  align-items: center;
  gap: 24px;
  color: #344054;
  font-size: 14px;
}

nav a:hover {
  color: var(--brand);
}

.hero {
  position: relative;
  min-height: min(760px, calc(100vh - 74px));
  overflow: hidden;
  background: #dbe6f0;
}

.hero img {
  height: min(760px, calc(100vh - 74px));
  min-height: 520px;
  object-fit: cover;
  object-position: center bottom;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(10, 22, 36, 0.68), rgba(10, 22, 36, 0.18) 48%, rgba(255, 255, 255, 0.04));
}

.hero-copy {
  position: absolute;
  z-index: 1;
  left: clamp(22px, 7vw, 112px);
  bottom: clamp(54px, 12vh, 140px);
  max-width: 680px;
  color: var(--white);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--brand);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 16px;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: rgba(255, 255, 255, 0.84);
}

h1,
h2,
h3,
p {
  letter-spacing: 0;
}

h1 {
  margin: 0 0 18px;
  font-size: clamp(36px, 5.4vw, 76px);
  line-height: 1.08;
  font-weight: 700;
}

h2 {
  margin: 0;
  font-size: clamp(28px, 3.2vw, 48px);
  line-height: 1.14;
  font-weight: 650;
}

h3 {
  margin: 0 0 10px;
  font-size: 21px;
  line-height: 1.3;
}

.hero-copy p:last-child {
  margin: 0;
  font-size: clamp(18px, 2vw, 26px);
  color: rgba(255, 255, 255, 0.88);
}

.section {
  max-width: 1180px;
  margin: 0 auto;
  padding: clamp(64px, 8vw, 112px) 22px;
}

.profile {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.84fr);
  gap: clamp(34px, 6vw, 72px);
  align-items: center;
}

.section-media img {
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.section-copy p {
  margin: 18px 0 0;
  color: #475467;
  font-size: 16px;
}

.facts {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 30px;
}

.facts div {
  border-top: 2px solid var(--brand);
  padding-top: 12px;
}

.facts strong {
  display: block;
  color: var(--brand);
  font-size: 28px;
  line-height: 1.1;
}

.facts span {
  color: var(--muted);
  font-size: 13px;
}

.section-heading {
  margin-bottom: 30px;
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.advantage-grid article {
  min-height: 250px;
  padding: 24px;
  background: var(--soft);
  border: 1px solid var(--line);
}

.advantage-grid span {
  display: block;
  margin-bottom: 42px;
  color: var(--brand);
  font-family: Georgia, "Times New Roman", serif;
  font-size: 26px;
}

.advantage-grid p,
.contact-box p {
  margin: 0;
  color: #475467;
  font-size: 15px;
}

.scope {
  display: grid;
  grid-template-columns: 0.45fr 1fr;
  gap: 36px;
  align-items: start;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.scope-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.scope-list span {
  display: flex;
  align-items: center;
  min-height: 78px;
  padding: 18px;
  background: var(--soft);
  border-left: 3px solid var(--brand);
  font-size: 18px;
  font-weight: 600;
}

.case-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.case-card {
  position: relative;
  overflow: hidden;
  min-height: 360px;
  background: #111827;
}

.case-card.wide {
  grid-column: span 2;
}

.case-card img {
  height: 100%;
  min-height: 360px;
  object-fit: cover;
  opacity: 0.86;
  transition: transform 0.35s ease, opacity 0.35s ease;
}

.case-card:hover img {
  transform: scale(1.035);
  opacity: 0.95;
}

.case-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.02), rgba(0, 0, 0, 0.68));
}

.case-card div {
  position: absolute;
  z-index: 1;
  left: 20px;
  right: 20px;
  bottom: 20px;
  color: var(--white);
  display: none;
}

.case-card p {
  margin: 0 0 6px;
  color: rgba(255, 255, 255, 0.72);
  font-family: Georgia, "Times New Roman", serif;
  text-transform: uppercase;
}

.contact {
  display: grid;
  grid-template-columns: 0.42fr 1fr;
  gap: 36px;
  background: var(--soft);
  max-width: none;
  padding-left: max(22px, calc((100vw - 1180px) / 2 + 22px));
  padding-right: max(22px, calc((100vw - 1180px) / 2 + 22px));
}

.contact-box {
  padding: 28px;
  background: var(--white);
  border: 1px solid var(--line);
}

.contact-box p + p {
  margin-top: 8px;
}

@media (max-width: 980px) {
  .topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  nav {
    flex-wrap: wrap;
    gap: 12px 18px;
  }

  .profile,
  .scope,
  .contact {
    grid-template-columns: 1fr;
  }

  .advantage-grid,
  .case-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 680px) {
  .brand-en {
    font-size: 27px;
  }

  nav {
    font-size: 13px;
  }

  .hero,
  .hero img {
    min-height: 560px;
  }

  .hero-copy {
    bottom: 42px;
  }

  .facts,
  .scope-list,
  .advantage-grid,
  .case-grid {
    grid-template-columns: 1fr;
  }

  .case-card.wide {
    grid-column: auto;
  }

  .case-card,
  .case-card img {
    min-height: 300px;
  }
}