:root {
  --ink: #111827;
  --muted: #5c6675;
  --paper: #f6f8f7;
  --white: #ffffff;
  --line: rgba(17, 24, 39, 0.12);
  --deep: #0b1728;
  --teal: #0f8b8d;
  --green: #5a8f55;
  --gold: #c78a32;
  --coral: #d15f4b;
  --shadow: 0 24px 60px rgba(20, 35, 51, 0.16);
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 20;
  width: 100%;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(20px, 5vw, 72px);
  color: var(--white);
  transition: background 0.2s ease, box-shadow 0.2s ease, color 0.2s ease;
}

.site-header.is-scrolled,
.site-header.is-open {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 10px 30px rgba(17, 24, 39, 0.08);
  backdrop-filter: blur(18px);
}

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

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  border: 1px solid currentColor;
  border-radius: 8px;
  font-size: 15px;
  letter-spacing: 0;
}

.brand-text {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 15px;
}

.site-nav a {
  position: relative;
  padding: 8px 0;
  color: currentColor;
}

.site-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 2px;
  width: 100%;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.2s ease;
}

.site-nav a:hover::after,
.site-nav a.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid currentColor;
  border-radius: 8px;
  color: currentColor;
  background: transparent;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
}

.hero {
  position: relative;
  min-height: 82svh;
  display: flex;
  align-items: center;
  padding: 116px clamp(20px, 7vw, 96px) 88px;
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(6, 17, 32, 0.9), rgba(6, 17, 32, 0.68) 48%, rgba(6, 17, 32, 0.18)),
    url("assets/hero-data-center.jpg") center / cover;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto clamp(20px, 7vw, 96px) 34px;
  height: 1px;
  background: rgba(255, 255, 255, 0.3);
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 780px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 760px;
  margin-bottom: 24px;
  font-size: clamp(44px, 7vw, 84px);
  line-height: 1.04;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.12;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 14px;
  font-size: 22px;
  line-height: 1.28;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 680px;
  margin-bottom: 34px;
  color: rgba(255, 255, 255, 0.84);
  font-size: clamp(17px, 2vw, 21px);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 8px;
  font-weight: 700;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  color: var(--deep);
  background: var(--white);
}

.btn-secondary {
  border: 1px solid rgba(255, 255, 255, 0.62);
  color: var(--white);
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin: -26px clamp(20px, 7vw, 96px) 0;
  position: relative;
  z-index: 2;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: var(--shadow);
  background: var(--line);
}

.trust-strip div {
  min-height: 118px;
  padding: 24px;
  background: var(--white);
}

.trust-strip strong {
  display: block;
  margin-bottom: 6px;
  color: var(--teal);
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1;
}

.trust-strip span {
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: clamp(72px, 10vw, 124px) clamp(20px, 7vw, 96px);
}

.intro-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: end;
}

.section-heading {
  max-width: 700px;
}

.section-lead {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 20px;
}

.services-section {
  background: var(--white);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin-top: 44px;
}

.service-card {
  min-height: 306px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fbfcfb;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.service-card:hover {
  transform: translateY(-4px);
  border-color: rgba(15, 139, 141, 0.34);
  box-shadow: 0 18px 40px rgba(17, 24, 39, 0.1);
}

.service-card.featured {
  color: var(--white);
  background:
    linear-gradient(145deg, rgba(11, 23, 40, 0.92), rgba(11, 23, 40, 0.62)),
    url("assets/service-dashboard.jpg") center / cover;
}

.service-card.featured p,
.service-card.featured .service-index {
  color: rgba(255, 255, 255, 0.82);
}

.service-index {
  display: inline-block;
  margin-bottom: 38px;
  color: var(--coral);
  font-size: 14px;
  font-weight: 800;
}

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

.solutions-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(28px, 5vw, 78px);
  align-items: center;
  background: #edf3f1;
}

.visual-panel {
  min-height: 560px;
  border-radius: 8px;
  background:
    linear-gradient(180deg, rgba(8, 19, 31, 0.08), rgba(8, 19, 31, 0.22)),
    url("assets/team-workspace.jpg") center / cover;
  box-shadow: var(--shadow);
}

.solutions-content {
  max-width: 720px;
}

.capability-list {
  display: grid;
  gap: 16px;
  margin-top: 34px;
}

.capability-list div {
  padding: 22px 0;
  border-top: 1px solid rgba(17, 24, 39, 0.16);
}

.capability-list span {
  display: block;
  margin-bottom: 8px;
  color: var(--green);
  font-size: 19px;
  font-weight: 800;
}

.capability-list p {
  max-width: 620px;
  margin-bottom: 0;
  color: var(--muted);
}

.about-section {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(280px, 0.65fr);
  gap: clamp(32px, 6vw, 92px);
  align-items: start;
  background: var(--deep);
  color: var(--white);
}

.about-copy p {
  max-width: 880px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 18px;
}

.about-copy p:last-child {
  margin-bottom: 0;
}

.about-card {
  position: sticky;
  top: 96px;
  display: grid;
  gap: 12px;
  padding: 28px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
}

.about-card strong {
  margin-bottom: 10px;
  font-size: 24px;
  line-height: 1.2;
}

.about-card span {
  padding: 12px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  color: rgba(255, 255, 255, 0.78);
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
  gap: clamp(28px, 5vw, 80px);
  align-items: center;
  padding: clamp(72px, 10vw, 120px) clamp(20px, 7vw, 96px);
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(11, 23, 40, 0.94), rgba(11, 23, 40, 0.76)),
    url("assets/contact-office.jpg") center / cover;
}

.contact-section p {
  max-width: 690px;
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 18px;
}

address {
  display: grid;
  gap: 16px;
  padding: 28px;
  border-left: 4px solid var(--gold);
  font-style: normal;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 0 8px 8px 0;
}

address span {
  font-weight: 800;
}

address a {
  color: rgba(255, 255, 255, 0.78);
  text-decoration: underline;
  text-decoration-color: rgba(255, 255, 255, 0.36);
  text-underline-offset: 5px;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 26px clamp(20px, 7vw, 96px);
  color: rgba(255, 255, 255, 0.74);
  background: #07101d;
  font-size: 14px;
}

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

@media (max-width: 980px) {
  .site-header {
    height: 66px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 66px;
    left: 20px;
    right: 20px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    color: var(--ink);
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow);
  }

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

  .site-nav a {
    padding: 12px 10px;
  }

  .trust-strip,
  .service-grid,
  .intro-section,
  .solutions-section,
  .about-section,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .trust-strip {
    margin-top: 0;
  }

  .visual-panel {
    min-height: 420px;
  }

  .about-card {
    position: static;
  }
}

@media (max-width: 640px) {
  .brand-text {
    max-width: 190px;
    font-size: 14px;
  }

  .hero {
    min-height: 78svh;
    padding-top: 100px;
    padding-bottom: 68px;
    background-position: 62% center;
  }

  h1 {
    font-size: 42px;
  }

  .hero-copy,
  .section-lead {
    font-size: 17px;
  }

  .trust-strip {
    border-radius: 0;
    margin-left: 0;
    margin-right: 0;
  }

  .trust-strip div {
    min-height: 104px;
    padding: 20px;
  }

  .service-card {
    min-height: auto;
    padding: 24px;
  }

  .service-index {
    margin-bottom: 24px;
  }

  .visual-panel {
    min-height: 320px;
  }

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