:root {
  --ink: #15171a;
  --muted: #5f6873;
  --line: #dbe1e8;
  --paper: #f7f9fb;
  --white: #ffffff;
  --teal: #0f8b8d;
  --green: #2d6a4f;
  --gold: #b2772b;
  --blue: #22577a;
  --shadow: 0 16px 36px rgba(18, 28, 42, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family:
    "Microsoft YaHei",
    "PingFang SC",
    "Noto Sans CJK SC",
    Arial,
    sans-serif;
  line-height: 1.65;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 72px;
  padding: 14px clamp(18px, 4vw, 56px);
  color: var(--white);
  background: rgba(14, 21, 28, 0.78);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  font-weight: 700;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  color: var(--white);
  background: linear-gradient(135deg, var(--teal), var(--gold));
  border-radius: 8px;
  font-size: 14px;
  letter-spacing: 0;
}

.brand-text {
  font-size: 19px;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 3vw, 34px);
  font-size: 15px;
}

.site-nav a {
  color: rgba(255, 255, 255, 0.86);
}

.site-nav a:hover,
.site-nav a:focus {
  color: var(--white);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 8px;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--white);
}

.hero {
  position: relative;
  display: grid;
  align-content: end;
  min-height: 92vh;
  padding: 128px clamp(20px, 5vw, 72px) 34px;
  overflow: hidden;
  color: var(--white);
  isolation: isolate;
}

.hero-image,
.hero-overlay {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-image {
  z-index: -3;
  object-fit: cover;
}

.hero-overlay {
  z-index: -2;
  background:
    linear-gradient(90deg, rgba(10, 18, 27, 0.92) 0%, rgba(10, 18, 27, 0.72) 48%, rgba(10, 18, 27, 0.38) 100%),
    linear-gradient(180deg, rgba(10, 18, 27, 0.12), rgba(10, 18, 27, 0.9));
}

.hero-content {
  width: min(760px, 100%);
  padding-bottom: clamp(28px, 7vh, 76px);
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

h1 {
  margin: 0;
  font-size: clamp(52px, 9vw, 112px);
  line-height: 0.96;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 690px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(17px, 2.1vw, 22px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 8px;
  font-weight: 700;
}

.button.primary {
  color: var(--white);
  background: var(--teal);
}

.button.secondary {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.38);
  background: rgba(255, 255, 255, 0.08);
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0;
  max-width: 1060px;
  margin: 0;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px);
}

.hero-facts div {
  min-width: 0;
  padding: 20px clamp(16px, 3vw, 28px);
  border-right: 1px solid rgba(255, 255, 255, 0.18);
}

.hero-facts div:last-child {
  border-right: 0;
}

.hero-facts dt {
  color: rgba(255, 255, 255, 0.62);
  font-size: 13px;
}

.hero-facts dd {
  margin: 6px 0 0;
  font-size: clamp(18px, 2.6vw, 27px);
  font-weight: 700;
  line-height: 1.25;
}

.section {
  padding: clamp(64px, 9vw, 116px) clamp(20px, 5vw, 72px);
}

.section-heading {
  width: min(720px, 100%);
  margin-bottom: 30px;
}

.section-heading h2,
.contact h2 {
  margin: 0;
  font-size: clamp(30px, 5vw, 54px);
  line-height: 1.14;
  letter-spacing: 0;
}

.intro {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 1fr);
  gap: clamp(24px, 6vw, 80px);
  align-items: end;
  background: var(--white);
}

.intro p:not(.eyebrow) {
  margin: 0;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 20px);
}

.services {
  background: var(--paper);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.service-card {
  min-height: 252px;
  padding: 26px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 8px 24px rgba(18, 28, 42, 0.05);
}

.service-index {
  color: var(--teal);
  font-weight: 800;
  font-size: 14px;
}

.service-card h3,
.solution-panel h3 {
  margin: 24px 0 10px;
  font-size: 22px;
  line-height: 1.25;
}

.service-card p,
.solution-panel p {
  margin: 0;
  color: var(--muted);
}

.solutions {
  color: var(--white);
  background: linear-gradient(135deg, #15312f 0%, #1b3f4d 54%, #315b51 100%);
}

.solutions .eyebrow {
  color: #d9a95b;
}

.solution-layout {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  background: rgba(255, 255, 255, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.solution-panel {
  min-height: 260px;
  padding: clamp(24px, 4vw, 38px);
  background: rgba(9, 18, 24, 0.28);
}

.solution-panel p {
  color: rgba(255, 255, 255, 0.76);
}

.profile {
  background: var(--white);
}

.profile-table {
  display: grid;
  width: min(1060px, 100%);
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.profile-table div {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  min-height: 66px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.profile-table span,
.profile-table strong {
  display: flex;
  align-items: center;
  padding: 16px 18px;
}

.profile-table span {
  color: var(--muted);
  background: #f1f5f8;
  border-right: 1px solid var(--line);
  font-weight: 600;
}

.profile-table strong {
  font-size: 17px;
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 460px);
  gap: 30px;
  align-items: end;
  color: var(--white);
  background: var(--ink);
}

.contact-copy p:not(.eyebrow) {
  max-width: 660px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 18px;
}

address {
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 8px;
  font-style: normal;
  background: rgba(255, 255, 255, 0.06);
}

address span {
  display: block;
  margin-bottom: 10px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 14px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 24px clamp(20px, 5vw, 72px);
  color: rgba(255, 255, 255, 0.7);
  background: #0d1116;
}

@media (max-width: 900px) {
  .site-nav {
    position: fixed;
    top: 72px;
    right: 16px;
    display: none;
    width: min(280px, calc(100vw - 32px));
    padding: 14px;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(14, 21, 28, 0.96);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 8px;
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 12px;
  }

  .nav-toggle {
    display: block;
  }

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

  .service-grid,
  .solution-layout {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .site-header {
    min-height: 66px;
    padding: 12px 16px;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
  }

  .brand-text {
    font-size: 17px;
  }

  .site-nav {
    top: 66px;
  }

  .hero {
    min-height: 94vh;
    padding: 110px 18px 22px;
  }

  .hero-facts {
    grid-template-columns: 1fr;
  }

  .hero-facts div {
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.18);
  }

  .hero-facts div:last-child {
    border-bottom: 0;
  }

  .service-grid,
  .solution-layout {
    grid-template-columns: 1fr;
  }

  .profile-table div {
    grid-template-columns: 1fr;
  }

  .profile-table span {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .site-footer {
    flex-direction: column;
  }
}