:root {
  --bg: #f4f7fc;
  --surface: rgba(255, 255, 255, 0.92);
  --text: #162746;
  --muted: #5d6f8d;
  --line: rgba(111, 140, 189, 0.2);
  --primary: #2d6bff;
  --shadow: 0 16px 36px rgba(32, 63, 119, 0.1);
  --radius-lg: 24px;
  --radius-md: 18px;
  --container: min(1120px, calc(100% - 40px));
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(108, 152, 255, 0.14), transparent 28%),
    linear-gradient(180deg, #f8fbff 0%, #edf3fb 100%);
}

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

img {
  display: block;
  max-width: 100%;
}

.container {
  width: var(--container);
  margin: 0 auto;
}

.site-shell {
  min-height: 100vh;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(14px);
  background: rgba(248, 251, 255, 0.9);
  border-bottom: 1px solid rgba(138, 161, 196, 0.14);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 78px;
}

.brand {
  display: inline-flex;
  align-items: center;
}

.brand-plain {
  max-width: 360px;
}

.brand-text {
  font-size: 1.05rem;
  font-weight: 700;
  line-height: 1.5;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 24px;
  font-size: 0.96rem;
}

.site-nav a {
  color: var(--muted);
  transition: color 0.2s ease;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: var(--primary);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0;
  border: 0;
  background: transparent;
}

.nav-toggle span {
  width: 26px;
  height: 2px;
  border-radius: 999px;
  background: var(--text);
}

.hero,
.sub-hero {
  padding: 56px 0 26px;
}

.hero-grid,
.sub-hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: center;
}

.hero-simple .hero-copy,
.sub-hero-simple .section-heading-left,
.sub-hero-grid > div:first-child {
  max-width: 620px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  color: var(--primary);
  font-size: 0.92rem;
  font-weight: 600;
}

.eyebrow::before {
  content: "";
  width: 22px;
  height: 2px;
  border-radius: 999px;
  background: currentColor;
}

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

h1 {
  font-size: clamp(2.2rem, 4.2vw, 4rem);
  line-height: 1.12;
  letter-spacing: -0.04em;
}

h2 {
  font-size: clamp(1.7rem, 3vw, 2.4rem);
  line-height: 1.2;
  letter-spacing: -0.03em;
}

h3 {
  font-size: 1.08rem;
  line-height: 1.4;
}

p {
  color: var(--muted);
  line-height: 1.8;
}

.hero-copy p,
.section-heading p,
.section-heading-left p {
  margin-top: 16px;
  font-size: 1rem;
}

.section {
  padding: 26px 0 76px;
}

.section-compact {
  padding-top: 8px;
}

.section-heading {
  max-width: 760px;
  margin: 0 auto 30px;
  text-align: center;
}

.section-heading-left {
  margin: 0;
  text-align: left;
}

.hero-image-card,
.image-panel {
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.hero-image-card {
  display: grid;
  place-items: center;
  min-height: 420px;
  padding: 32px;
  background:
    radial-gradient(circle at top, rgba(113, 164, 255, 0.12), transparent 45%),
    linear-gradient(180deg, #ffffff 0%, #f3f7fd 100%);
}

.hero-image-card img {
  width: min(420px, 100%);
  height: auto;
}

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

.image-panel-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.card-grid {
  display: grid;
  gap: 22px;
}

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

.card-grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.info-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: var(--surface);
  box-shadow: 0 10px 24px rgba(35, 64, 121, 0.08);
}

.info-card p {
  margin-top: 12px;
}

.site-footer {
  padding: 30px 0 40px;
  background: #101827;
  color: rgba(236, 242, 252, 0.88);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr 1fr;
  gap: 24px;
}

.footer-title,
.site-footer h3 {
  color: #fff;
  font-weight: 700;
}

.footer-copy,
.site-footer p,
.site-footer a {
  color: rgba(219, 228, 244, 0.8);
  line-height: 1.75;
}

.site-footer a {
  display: block;
  margin-top: 8px;
}

.beian-slot {
  display: inline-block;
  width: 112px;
  max-width: 100%;
  height: 1em;
  vertical-align: middle;
  border-bottom: 1px solid rgba(219, 228, 244, 0.45);
}

@media (max-width: 920px) {
  .hero-grid,
  .sub-hero-grid,
  .footer-grid,
  .card-grid-2,
  .card-grid-3 {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  .container {
    width: min(100% - 28px, 1120px);
  }

  .brand-plain {
    max-width: 220px;
  }

  .brand-text {
    font-size: 0.96rem;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 10px);
    right: 14px;
    left: 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
    padding: 18px;
    border-radius: 18px;
    border: 1px solid rgba(138, 161, 196, 0.18);
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 12px 28px rgba(35, 64, 121, 0.08);
  }

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

  .hero,
  .sub-hero {
    padding-top: 30px;
  }

  .hero-image-card,
  .image-panel {
    min-height: 280px;
  }
}