:root {
  color-scheme: light;
  --bg: #f6f8fb;
  --surface: #ffffff;
  --surface-strong: #102033;
  --text: #172033;
  --muted: #5e6a7d;
  --line: #dbe3ee;
  --blue: #1268d6;
  --blue-dark: #0d4f9e;
  --green: #20a875;
  --shadow: 0 18px 50px rgba(30, 54, 83, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial,
    sans-serif;
  line-height: 1.6;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 6vw;
  border-bottom: 1px solid rgba(219, 227, 238, 0.8);
  background: rgba(246, 248, 251, 0.92);
  backdrop-filter: blur(16px);
}

.brand,
.nav,
.hero-actions,
.panel-row,
.contact-card {
  display: flex;
  align-items: center;
}

.brand {
  gap: 12px;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border-radius: 10px;
  background: var(--blue);
  color: #fff;
  font-weight: 900;
}

.brand-text {
  font-size: 18px;
}

.nav {
  gap: 28px;
  color: var(--muted);
  font-size: 14px;
}

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

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.72fr);
  gap: 48px;
  align-items: center;
  min-height: calc(100vh - 72px);
  padding: 72px 6vw 84px;
  background:
    linear-gradient(135deg, rgba(18, 104, 214, 0.09), transparent 42%),
    linear-gradient(180deg, #fff, var(--bg));
}

.hero-copy {
  max-width: 760px;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

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

h1 {
  max-width: 780px;
  margin-bottom: 22px;
  font-size: clamp(40px, 7vw, 76px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 14px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

.lead {
  max-width: 720px;
  color: var(--muted);
  font-size: 18px;
}

.hero-actions {
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 8px;
  font-weight: 700;
}

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

.button.primary:hover {
  background: var(--blue-dark);
}

.button.secondary {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
}

.button.secondary:hover {
  border-color: var(--blue);
  color: var(--blue);
}

.hero-panel {
  overflow: hidden;
  border-radius: 18px;
  background: var(--surface-strong);
  color: #fff;
  box-shadow: var(--shadow);
}

.hero-panel img {
  display: block;
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.panel-list {
  padding: 18px 26px 20px;
  background:
    linear-gradient(135deg, rgba(32, 168, 117, 0.16), transparent 50%),
    var(--surface-strong);
}

.panel-row {
  justify-content: space-between;
  gap: 18px;
  min-height: 64px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.panel-row:last-child {
  border-bottom: 0;
}

.panel-row span {
  color: rgba(255, 255, 255, 0.66);
  font-size: 13px;
}

.panel-row strong {
  font-size: 18px;
  text-align: right;
}

.section {
  padding: 80px 6vw;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 28px;
}

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

.card {
  min-height: 190px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  padding: 26px;
  box-shadow: 0 10px 26px rgba(30, 54, 83, 0.06);
}

.card p,
.split-section p,
.contact-section p {
  color: var(--muted);
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
  gap: 48px;
  background: #fff;
}

.feature-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature-list li {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 18px;
  align-items: start;
  border-bottom: 1px solid var(--line);
  padding: 0 0 18px;
}

.feature-list strong {
  color: var(--blue-dark);
}

.feature-list span {
  color: var(--muted);
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 48px;
  align-items: center;
}

.contact-card {
  flex-direction: column;
  align-items: flex-start;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  padding: 28px;
  box-shadow: var(--shadow);
}

.contact-card p {
  margin-bottom: 8px;
  font-size: 14px;
}

.contact-card a {
  margin-bottom: 18px;
  color: var(--blue);
  font-size: 20px;
  font-weight: 800;
  word-break: break-word;
}

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

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 26px 6vw;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 980px) {
  .hero,
  .split-section,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

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

@media (max-width: 680px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
    padding-top: 16px;
    padding-bottom: 16px;
  }

  .nav {
    flex-wrap: wrap;
    gap: 16px;
  }

  .hero,
  .section {
    padding-right: 22px;
    padding-left: 22px;
  }

  h1 {
    font-size: 40px;
  }

  .card-grid,
  .feature-list li {
    grid-template-columns: 1fr;
  }

  .site-footer {
    flex-direction: column;
    padding-right: 22px;
    padding-left: 22px;
  }
}