:root {
  color-scheme: light;
  --navy: #0f172a;
  --slate: #1f2933;
  --muted: #64748b;
  --accent: #1d4ed8;
  --surface: #f8fafc;
  --border: #e2e8f0;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--slate);
  line-height: 1.6;
  background-color: #ffffff;
}

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

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 2rem;
}

header {
  background: var(--navy);
  color: #ffffff;
  padding: 24px 0 72px;
}

.top-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.brand::before {
  content: "V";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  font-weight: 800;
  font-size: 1rem;
  letter-spacing: 0;
  box-shadow: 0 10px 20px rgba(29, 78, 216, 0.35);
}

nav ul {
  list-style: none;
  display: flex;
  gap: 24px;
  margin: 0;
  padding: 0;
  font-size: 0.95rem;
}

nav a {
  color: #ffffff;
  opacity: 0.9;
}

nav a:hover,
nav a:focus {
  opacity: 1;
}


.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

nav ul li a {
  display: inline-block;
}

.hero {
  margin-top: 48px;
  max-width: 700px;
}

.hero h1 {
  font-size: 3rem;
  margin: 0 0 16px;
}

.hero p {
  font-size: 1.1rem;
  color: #e2e8f0;
  margin: 0 0 28px;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 20px;
  border-radius: 6px;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.95rem;
}

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

.button.ghost {
  border-color: #94a3b8;
  color: #e2e8f0;
}

main section {
  padding: 2.25rem 0;
}

.section-header {
  margin-bottom: 32px;
  max-width: 640px;
}

.section-header h2 {
  margin-top: 0;
}

.section-header p {
  margin: 0;
  color: var(--muted);
}

.services {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.card {
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  background: #ffffff;
  box-shadow: 0 14px 30px rgba(15, 23, 42, 0.06);
}

.service-image {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: 8px;
  margin-bottom: 16px;
}

.card h3 {
  margin-top: 0;
  margin-bottom: 12px;
  color: var(--navy);
}

.card ul {
  padding-left: 20px;
  margin: 0;
}

.highlight {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 32px;
  border-radius: 12px;
  display: grid;
  gap: 24px;
  grid-template-columns: minmax(220px, 1fr) 1.2fr;
  align-items: center;
}

.highlight-media img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 10px;
}

.metrics {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
  margin-top: 32px;
}

.metric {
  padding: 20px;
  border-radius: 10px;
  background: #ffffff;
  border: 1px solid var(--border);
}

.metric strong {
  display: block;
  font-size: 1.5rem;
  color: var(--navy);
}

.split {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
  align-items: center;
}

.about-split {
  align-items: start;
}

.about-image {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: 10px;
  margin-bottom: 16px;
}

.about-card {
  align-self: start;
  background: var(--surface);
  border-left: 4px solid var(--accent);
  /* 下移以与左侧 about 图片顶部对齐（约等于 section-header 高度 + 一行） */
  margin-top: 7rem;
}

.contact-card {
  background: var(--navy);
  color: #ffffff;
  border-radius: 12px;
  padding: 24px;
}

.contact-card a {
  color: #ffffff;
  font-weight: 600;
}

.values-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.values-list li {
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--navy);
}

.values-grid {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.values-grid li {
  background: #f8fafc;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  padding: 1.25rem;
}

.values-grid strong {
  display: block;
  font-size: 1rem;
  color: var(--navy);
  margin-bottom: 0.25rem;
}

.values-grid span {
  font-size: 0.95rem;
  color: #475569;
}
footer {
  background: #0b1120;
  color: #94a3b8;
  padding: 32px 0;
  font-size: 0.9rem;
}

footer .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
}

@media (max-width: 720px) {
  .top-bar {
    flex-direction: column;
    align-items: flex-start;
  }

  nav ul {
    flex-wrap: wrap;
  }

  .hero h1 {
    font-size: 2.4rem;
  }

  .highlight {
    grid-template-columns: 1fr;
  }

  .about-card {
    margin-top: 24px;
  }
}