:root {
  --bg: #f4f7fb;
  --surface: #ffffff;
  --surface-alt: #eef3f9;
  --text: #1a2433;
  --muted: #5d6a7d;
  --primary: #0c3c78;
  --primary-soft: #dce9fb;
  --accent: #b88746;
  --border: rgba(12, 60, 120, 0.12);
  --shadow: 0 18px 50px rgba(16, 38, 66, 0.08);
  --radius: 22px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(184, 135, 70, 0.16), transparent 24%),
    linear-gradient(180deg, #f8fbff 0%, #f4f7fb 34%, #edf2f8 100%);
  line-height: 1.7;
}

img {
  display: block;
  width: 100%;
  border: 0;
}

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

.container {
  width: min(calc(100% - 48px), var(--container));
  margin: 0 auto;
}

.site-header {
  background:
    linear-gradient(135deg, rgba(8, 28, 58, 0.92), rgba(12, 60, 120, 0.9)),
    url("https://picsum.photos/seed/zhg-header-bg/1600/900") center/cover no-repeat,
    #0d2d58;
  color: #fff;
  padding-bottom: 48px;
}

.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 26px 0;
}

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

.brand-name {
  margin: 0;
  font-size: 1.5rem;
  font-weight: 700;
  line-height: 1.2;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 0.96rem;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: #fff;
}

.hero {
  padding: 28px 0 12px;
}

.hero-grid,
.feature-grid,
.case-grid,
.intro-grid,
.footer-grid {
  display: grid;
  gap: 34px;
}

.hero-grid {
  grid-template-columns: 1.2fr 0.95fr;
  align-items: center;
}

.section-tag {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.hero .section-tag {
  color: #d7b27a;
}

.hero-content h1,
.section h2,
.site-footer h2 {
  margin: 0;
  line-height: 1.22;
}

.hero-content h1 {
  font-size: clamp(2.5rem, 5vw, 4.4rem);
  max-width: 8em;
}

.hero-lead,
.section-text {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 1rem;
}

.hero-lead {
  color: rgba(255, 255, 255, 0.84);
  max-width: 38rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 138px;
  padding: 12px 20px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 600;
  transition: 0.2s ease;
}

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

.button-primary:hover,
.button-primary:focus-visible {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(255, 255, 255, 0.14);
}

.button-secondary {
  border-color: rgba(255, 255, 255, 0.26);
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  background: rgba(255, 255, 255, 0.12);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
}

.hero-metrics li {
  padding: 18px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-metrics strong,
.hero-metrics span {
  display: block;
}

.hero-metrics strong {
  font-size: 1.2rem;
  margin-bottom: 6px;
}

.hero-metrics span {
  color: rgba(255, 255, 255, 0.74);
  font-size: 0.92rem;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-visual {
  position: relative;
  padding: 16px;
  background: linear-gradient(180deg, #ffffff, #edf4fd);
}

.hero-visual img,
.feature-visual img,
.case-card img {
  border-radius: 18px;
  object-fit: cover;
}

.visual-badge {
  position: absolute;
  left: 36px;
  bottom: 36px;
  padding: 18px 22px;
  border-radius: 18px;
  background: rgba(11, 35, 69, 0.88);
  color: #fff;
  backdrop-filter: blur(14px);
}

.visual-badge span,
.visual-badge strong {
  display: block;
}

.visual-badge span {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.86rem;
}

.visual-badge strong {
  margin-top: 5px;
  font-size: 1.02rem;
}

.section {
  padding: 88px 0;
}

.section-heading {
  max-width: 700px;
  margin-bottom: 32px;
}

.intro-section {
  padding-top: 78px;
}

.intro-grid,
.footer-grid {
  grid-template-columns: 1.1fr 0.9fr;
  align-items: start;
}

.info-panel {
  display: grid;
  gap: 18px;
}

.info-item {
  padding: 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.info-item h3,
.service-card h3,
.advantage-item h3,
.timeline-item h3,
.case-content h3 {
  margin: 0 0 10px;
  font-size: 1.18rem;
}

.info-item p,
.service-card p,
.advantage-item p,
.timeline-item p,
.contact-card p,
.case-content p {
  margin: 0;
  color: var(--muted);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.service-card {
  padding: 28px;
  min-height: 208px;
  background: linear-gradient(180deg, #ffffff, #f8fbff);
}

.feature-section {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0), rgba(12, 60, 120, 0.03));
}

.feature-grid,
.case-grid {
  grid-template-columns: 0.95fr 1.05fr;
  align-items: center;
}

.feature-visual {
  padding: 16px;
}

.advantage-list {
  display: grid;
  gap: 18px;
  margin-top: 28px;
}

.advantage-item {
  padding: 24px 26px;
  border-left: 4px solid var(--accent);
  background: rgba(255, 255, 255, 0.8);
  border-radius: 0 18px 18px 0;
}

.timeline {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.timeline-item {
  padding: 26px;
}

.timeline-index {
  display: inline-block;
  margin-bottom: 18px;
  color: var(--primary);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.08em;
}

.case-card {
  display: grid;
  gap: 0;
}

.case-content {
  padding: 26px;
}

.site-footer {
  padding: 82px 0 96px;
  background: #0d223f;
  color: #fff;
}

.site-footer .section-text {
  color: rgba(255, 255, 255, 0.78);
}

.contact-card {
  padding: 28px;
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.12);
  box-shadow: none;
}

.contact-card p {
  color: rgba(255, 255, 255, 0.88);
}

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

.footer-record {
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-record p {
  margin: 0;
  text-align: center;
  color: rgba(255, 255, 255, 0.68);
  font-size: 0.92rem;
}

@media (max-width: 1024px) {
  .hero-grid,
  .intro-grid,
  .feature-grid,
  .case-grid,
  .footer-grid,
  .services-grid,
  .timeline {
    grid-template-columns: 1fr 1fr;
  }

  .hero-grid,
  .feature-grid,
  .case-grid {
    align-items: stretch;
  }

  .hero-content h1 {
    max-width: none;
  }
}

@media (max-width: 780px) {
  .container {
    width: min(calc(100% - 32px), var(--container));
  }

  .nav-bar,
  .main-nav,
  .hero-actions,
  .hero-metrics,
  .hero-grid,
  .intro-grid,
  .feature-grid,
  .case-grid,
  .footer-grid,
  .services-grid,
  .timeline {
    grid-template-columns: 1fr;
  }

  .nav-bar,
  .main-nav {
    display: grid;
  }

  .main-nav {
    gap: 12px;
    width: 100%;
  }

  .hero {
    padding-top: 16px;
  }

  .section {
    padding: 68px 0;
  }

  .hero-content h1 {
    font-size: clamp(2.2rem, 10vw, 3.2rem);
  }

  .visual-badge {
    position: static;
    margin: 16px;
  }
}