:root {
  color-scheme: light;
  --ink: #16202a;
  --muted: #5e6874;
  --line: #d9e2e8;
  --paper: #ffffff;
  --soft: #eef4f1;
  --soft-2: #f7f9fb;
  --blue: #1d5f8f;
  --green: #24725d;
  --gold: #b9832f;
  --shadow: 0 18px 42px rgba(24, 38, 52, 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;
}

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 clamp(20px, 5vw, 64px);
  color: #fff;
  transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.site-header.is-solid {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 1px 18px rgba(19, 30, 43, 0.1);
  backdrop-filter: blur(14px);
}

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

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid currentColor;
  border-radius: 8px;
  font-size: 20px;
  font-weight: 700;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 18px;
  letter-spacing: 0;
}

.brand small {
  margin-top: 1px;
  font-size: 12px;
  opacity: 0.78;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  font-size: 15px;
  font-weight: 600;
}

.site-nav a {
  opacity: 0.9;
}

.site-nav a:hover {
  opacity: 1;
}

.nav-toggle {
  display: none;
}

.hero {
  position: relative;
  min-height: min(760px, 92vh);
  overflow: hidden;
  color: #fff;
}

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

.hero-shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(9, 25, 38, 0.86), rgba(9, 25, 38, 0.46) 48%, rgba(9, 25, 38, 0.1)),
    linear-gradient(180deg, rgba(9, 25, 38, 0.34), rgba(9, 25, 38, 0.06) 62%, rgba(9, 25, 38, 0.4));
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: clamp(140px, 20vh, 190px) 0 96px;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: #f0c46d;
}

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

h1 {
  margin: 0;
  font-size: clamp(46px, 8vw, 82px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.22;
  letter-spacing: 0;
}

h3 {
  margin: 0 0 8px;
  font-size: 20px;
  line-height: 1.35;
}

.hero-copy {
  width: min(650px, 100%);
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: clamp(17px, 2vw, 21px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1px solid rgba(255, 255, 255, 0.74);
  border-radius: 8px;
  font-weight: 700;
}

.button.primary {
  border-color: #fff;
  color: var(--ink);
  background: #fff;
}

.button.secondary {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.section,
.contact-section {
  padding: clamp(64px, 10vw, 112px) 0;
}

.muted {
  background: var(--soft-2);
}

.section-inner {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.intro {
  background: var(--soft);
}

.intro-grid,
.split,
.about-grid,
.contact-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(30px, 6vw, 76px);
  align-items: start;
}

.intro-grid p:last-child,
.section-heading p,
.about-copy p,
.contact-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 17px;
}

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

.service-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.service-card {
  min-height: 238px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 1px 0 rgba(21, 38, 53, 0.04);
}

.card-icon {
  display: inline-flex;
  margin-bottom: 44px;
  color: var(--green);
  font-weight: 800;
}

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

.solution-list {
  display: grid;
  gap: 18px;
}

.solution-item {
  padding: 0 0 22px 26px;
  border-left: 3px solid var(--green);
}

.facts {
  display: grid;
  gap: 14px;
  margin: 30px 0 0;
}

.facts div {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 18px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.facts dt {
  color: var(--blue);
  font-weight: 800;
}

.facts dd {
  margin: 0;
  color: var(--muted);
}

.contact-section {
  color: #fff;
  background: #173042;
}

.contact-section .section-kicker {
  color: #f0c46d;
}

.contact-grid h2 {
  color: #fff;
}

.contact-grid p {
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.76);
}

.contact-panel {
  display: grid;
  gap: 12px;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.contact-panel a {
  color: #fff;
  font-size: clamp(22px, 4vw, 34px);
  font-weight: 800;
  line-height: 1.2;
}

.contact-panel span {
  color: rgba(255, 255, 255, 0.74);
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px clamp(20px, 5vw, 64px);
  color: var(--muted);
  background: #fff;
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.site-footer div {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.site-footer strong {
  color: var(--ink);
}

.site-footer a:hover {
  color: var(--blue);
}

@media (max-width: 900px) {
  .nav-toggle {
    position: relative;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: 1px solid currentColor;
    border-radius: 8px;
    color: inherit;
    background: transparent;
  }

  .nav-toggle span {
    width: 20px;
    height: 2px;
    margin: 2px 0;
    background: currentColor;
  }

  .nav-toggle b {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
  }

  .site-nav {
    position: fixed;
    top: 72px;
    left: 20px;
    right: 20px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    color: var(--ink);
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: var(--shadow);
  }

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

  .site-nav a {
    padding: 12px 14px;
  }

  .hero {
    min-height: 720px;
  }

  .hero-shade {
    background:
      linear-gradient(180deg, rgba(9, 25, 38, 0.82), rgba(9, 25, 38, 0.66) 44%, rgba(9, 25, 38, 0.28)),
      linear-gradient(90deg, rgba(9, 25, 38, 0.4), rgba(9, 25, 38, 0.16));
  }

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

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

@media (max-width: 620px) {
  .site-header {
    min-height: 66px;
    padding: 0 16px;
  }

  .brand small {
    display: none;
  }

  .hero {
    min-height: 690px;
  }

  .hero-content,
  .section-inner {
    width: min(100% - 32px, 1120px);
  }

  .hero-content {
    padding-top: 118px;
  }

  .hero-actions {
    display: grid;
  }

  .button {
    width: 100%;
  }

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

  .service-card {
    min-height: auto;
  }

  .card-icon {
    margin-bottom: 26px;
  }

  .facts div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}