:root {
  color-scheme: light;
  --ink: #14202b;
  --muted: #5e6d7b;
  --line: #dfe6ec;
  --paper: #f7fafc;
  --white: #ffffff;
  --cyan: #0aa6c2;
  --amber: #d88619;
  --navy: #102534;
  --deep: #08131d;
  font-family:
    "Inter", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial,
    sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 76px;
  padding: 0 clamp(20px, 5vw, 72px);
  color: var(--white);
  background: rgba(6, 17, 27, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(18px);
}

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

.brand-logo {
  display: block;
  width: 40px;
  height: 40px;
  object-fit: cover;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
}

.brand strong,
.brand small {
  display: block;
  line-height: 1.2;
}

.brand strong {
  font-size: 16px;
}

.brand small {
  margin-top: 2px;
  color: rgba(255, 255, 255, 0.64);
  font-size: 12px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
}

.site-nav a {
  transition:
    color 0.2s ease,
    transform 0.2s ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--white);
  transform: translateY(-1px);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: transparent;
}

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

.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding: 132px clamp(20px, 5vw, 72px) 88px;
  color: var(--white);
  overflow: hidden;
  background: var(--deep);
}

.hero-media,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-media {
  background-image: url("./assets/hero-tech.png");
  background-position: center;
  background-size: cover;
  transform: scale(1.02);
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(5, 13, 21, 0.94) 0%, rgba(5, 13, 21, 0.78) 36%, rgba(5, 13, 21, 0.16) 76%),
    linear-gradient(0deg, rgba(5, 13, 21, 0.84) 0%, rgba(5, 13, 21, 0) 28%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(720px, 100%);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 24px;
  font-size: clamp(42px, 7vw, 82px);
  line-height: 1.05;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 600px;
  color: rgba(255, 255, 255, 0.78);
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.8;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 700;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    border-color 0.2s ease;
}

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

.button-primary {
  color: var(--white);
  background: linear-gradient(135deg, var(--cyan), #087d93);
  box-shadow: 0 18px 36px rgba(10, 166, 194, 0.26);
}

.button-ghost {
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.34);
  background: rgba(255, 255, 255, 0.06);
}

.section {
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto;
  padding: 92px 0;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 34px;
}

h2 {
  color: var(--navy);
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.18;
  letter-spacing: 0;
}

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

.feature-card {
  min-height: 250px;
  padding: 28px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 16px 46px rgba(26, 46, 64, 0.08);
}

.feature-index {
  color: var(--amber);
  font-weight: 900;
}

.feature-card h3,
.solution-list h3 {
  margin: 28px 0 12px;
  color: var(--navy);
  font-size: 22px;
}

.feature-card p,
.solution-list p,
.about-copy p,
.contact p {
  color: var(--muted);
  line-height: 1.85;
}

.band {
  padding: 92px clamp(20px, 5vw, 72px);
  color: var(--white);
  background:
    linear-gradient(135deg, rgba(16, 37, 52, 0.98), rgba(8, 19, 29, 0.98)),
    radial-gradient(circle at 70% 20%, rgba(10, 166, 194, 0.28), transparent 38%);
}

.band h2,
.band h3 {
  color: var(--white);
}

.band-inner {
  width: min(1160px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 52px;
  align-items: start;
}

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

.solution-list div {
  padding: 24px 0 26px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
}

.solution-list h3 {
  margin-top: 0;
}

.solution-list p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.68);
}

.about-section {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}

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

.stats div {
  padding: 24px;
  background: var(--white);
  border-left: 4px solid var(--cyan);
  border-radius: 8px;
  box-shadow: 0 12px 34px rgba(26, 46, 64, 0.07);
}

.stats dt {
  color: var(--navy);
  font-size: 24px;
  font-weight: 900;
}

.stats dd {
  margin: 8px 0 0;
  color: var(--muted);
}

.contact {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 28px;
  width: min(1160px, calc(100% - 40px));
  margin: 0 auto 78px;
  padding: 42px;
  color: var(--white);
  background: linear-gradient(135deg, var(--navy), #143e4b);
  border-radius: 8px;
}

.contact h2 {
  margin-bottom: 12px;
  color: var(--white);
}

.contact p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.72);
}

.site-footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 28px clamp(20px, 5vw, 72px);
  color: rgba(255, 255, 255, 0.7);
  background: #06111b;
  font-size: 14px;
  text-align: center;
}

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

@media (max-width: 820px) {
  .site-header {
    height: 66px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    top: 66px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 8px 20px 18px;
    background: rgba(6, 17, 27, 0.96);
  }

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

  .site-nav a {
    width: 100%;
    padding: 14px 0;
  }

  .hero {
    min-height: 88vh;
    padding-top: 112px;
  }

  .hero-shade {
    background: linear-gradient(90deg, rgba(5, 13, 21, 0.94), rgba(5, 13, 21, 0.54));
  }

  .feature-grid,
  .band-inner,
  .about-section {
    grid-template-columns: 1fr;
  }

  .contact,
  .site-footer {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 520px) {
  .brand strong {
    font-size: 14px;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

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

  .contact {
    padding: 28px 22px;
  }
}