* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: #172033;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  background: #f5f7fb;
}

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

.site-header {
  position: fixed;
  z-index: 10;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 clamp(18px, 5vw, 72px);
  color: #ffffff;
  background: rgba(5, 18, 32, 0.72);
  backdrop-filter: blur(16px);
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
}

.site-brand span {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  color: #07364d;
  background: #ffffff;
}

.site-nav {
  display: inline-flex;
  align-items: center;
  gap: 22px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 14px;
  font-weight: 800;
}

.site-nav a:hover {
  color: #ffffff;
}

.hero-section {
  position: relative;
  min-height: 82vh;
  display: grid;
  align-items: center;
  overflow: hidden;
  color: #ffffff;
}

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

.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(4, 16, 28, 0.58);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(820px, calc(100vw - 40px));
  display: grid;
  gap: 18px;
  padding: 118px clamp(20px, 6vw, 82px) 72px;
}

.hero-content p {
  margin: 0;
  color: #8ee3c2;
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.hero-content h1 {
  margin: 0;
  font-size: clamp(44px, 7vw, 86px);
  line-height: 1.02;
  letter-spacing: 0;
}

.hero-content span {
  max-width: 640px;
  color: rgba(255, 255, 255, 0.84);
  font-size: 19px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 8px;
}

.primary-link,
.secondary-link {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 900;
}

.primary-link {
  color: #ffffff;
  background: #ff7a45;
}

.secondary-link {
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.36);
  background: rgba(255, 255, 255, 0.1);
}

.section-wrap {
  display: grid;
  gap: 26px;
  padding: 56px clamp(18px, 5vw, 72px);
  background: #ffffff;
}

.section-head {
  display: grid;
  gap: 8px;
}

.section-head span,
.scene-band span {
  color: #0d9488;
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.section-head h2,
.scene-band h2 {
  margin: 0;
  color: #101828;
  font-size: clamp(26px, 3vw, 36px);
  line-height: 1.25;
  letter-spacing: 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.feature-grid article {
  min-height: 190px;
  display: grid;
  align-content: start;
  gap: 12px;
  padding: 22px;
  border: 1px solid #e6edf5;
  border-radius: 8px;
  background: #fbfcfe;
}

.feature-grid b {
  color: #ff7a45;
  font-size: 13px;
}

.feature-grid h3 {
  margin: 0;
  color: #172033;
  font-size: 20px;
}

.feature-grid p {
  margin: 0;
  color: #667085;
  font-size: 14px;
  line-height: 1.7;
}

.scene-band {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 28px;
  align-items: center;
  padding: 50px clamp(18px, 5vw, 72px);
  border-top: 1px solid #e6edf5;
  background: #eef7f5;
}

.scene-band > div {
  display: grid;
  gap: 8px;
}

.scene-band ul {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.scene-band li {
  min-height: 48px;
  display: flex;
  align-items: center;
  padding: 0 16px;
  border: 1px solid #d7ece6;
  border-radius: 6px;
  color: #17534b;
  background: #ffffff;
  font-weight: 900;
}

.site-footer {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px 18px;
  padding: 18px;
  color: #667085;
  background: #ffffff;
  border-top: 1px solid #e6edf5;
  font-size: 13px;
}

.site-footer a {
  color: #475467;
}

.site-footer a:hover {
  color: #1267f1;
}

@media (max-width: 980px) {
  .feature-grid,
  .scene-band {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 720px) {
  .site-header {
    position: absolute;
    height: auto;
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
    padding-top: 16px;
    padding-bottom: 16px;
  }

  .site-nav {
    width: 100%;
    justify-content: space-between;
    gap: 10px;
    font-size: 13px;
  }

  .hero-section {
    min-height: 86vh;
  }

  .hero-content {
    padding-top: 144px;
  }

  .hero-content span {
    font-size: 16px;
  }

  .feature-grid,
  .scene-band,
  .scene-band ul {
    grid-template-columns: minmax(0, 1fr);
  }
}