:root {
  color-scheme: light;
  --ink: #152123;
  --muted: #526265;
  --line: #dbe5e3;
  --surface: #f7faf9;
  --teal: #0f9f94;
  --teal-dark: #08766e;
  --amber: #b9801c;
  --rose: #b45567;
  font-family:
    "Microsoft YaHei",
    "PingFang SC",
    "Noto Sans SC",
    system-ui,
    sans-serif;
}

* {
  box-sizing: border-box;
}

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

a {
  color: inherit;
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  right: 0;
  left: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(18px, 4vw, 56px);
  background: rgba(255, 255, 255, 0.82);
  border-bottom: 1px solid rgba(21, 33, 35, 0.08);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  width: 34px;
  height: 34px;
  place-items: center;
  color: #ffffff;
  background: var(--teal-dark);
  border-radius: 8px;
}

.nav {
  display: flex;
  gap: clamp(12px, 2.4vw, 28px);
  color: var(--muted);
  font-size: 15px;
}

.nav a {
  text-decoration: none;
}

.hero {
  position: relative;
  min-height: 92vh;
  display: grid;
  align-items: center;
  overflow: hidden;
  padding: 96px clamp(20px, 6vw, 76px) 52px;
}

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

.hero-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(255, 255, 255, 0.96) 0%, rgba(255, 255, 255, 0.72) 35%, rgba(255, 255, 255, 0.08) 70%);
}

.hero-content {
  position: relative;
  max-width: 620px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--teal-dark);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0;
}

h1,
h2,
h3,
p {
  letter-spacing: 0;
}

h1 {
  margin: 0;
  font-size: clamp(42px, 6vw, 76px);
  line-height: 1.02;
}

.hero-copy {
  max-width: 560px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(17px, 2vw, 22px);
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.primary-action,
.secondary-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 8px;
  font-weight: 800;
  text-decoration: none;
}

.primary-action {
  color: #ffffff;
  background: var(--teal-dark);
}

.secondary-action {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
}

.section {
  padding: 76px clamp(20px, 6vw, 76px);
}

.section-heading {
  max-width: 760px;
}

.section h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 46px);
  line-height: 1.18;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 30px;
}

.feature-card {
  min-height: 180px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.feature-card:nth-child(2) {
  border-top-color: var(--amber);
}

.feature-card:nth-child(3) {
  border-top-color: var(--rose);
}

.feature-card h3 {
  margin: 0 0 12px;
  font-size: 20px;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.status-band {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(320px, 1fr);
  gap: 36px;
  align-items: start;
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.status-list {
  display: grid;
  gap: 12px;
  margin: 0;
}

.status-list div {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.status-list dt {
  color: var(--muted);
  font-weight: 800;
}

.status-list dd {
  margin: 0;
  overflow-wrap: anywhere;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 28px clamp(20px, 6vw, 76px);
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 900px) {
  .nav {
    display: none;
  }

  .hero {
    min-height: 86vh;
  }

  .hero-shade {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.98) 0%, rgba(255, 255, 255, 0.78) 56%, rgba(255, 255, 255, 0.24) 100%);
  }

  .hero-image {
    object-position: 58% center;
  }

  .feature-grid,
  .status-band {
    grid-template-columns: 1fr;
  }

  .status-list div {
    grid-template-columns: 1fr;
    gap: 6px;
  }

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