:root {
  --bg: #f6f8fc;
  --text: #1f2937;
  --muted: #5b6472;
  --primary: #2a66ff;
  --primary-dark: #1d4ed8;
  --white: #ffffff;
  --border: #e6ebf2;
  --card-shadow: 0 8px 28px rgba(34, 73, 144, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
}

.container {
  width: min(1120px, 92%);
  margin: 0 auto;
}

.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 66px;
}

.logo {
  font-size: 20px;
  font-weight: 700;
  color: var(--primary);
}

.nav nav a {
  text-decoration: none;
  color: var(--text);
  margin-left: 18px;
  font-size: 14px;
}

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

.hero {
  background: linear-gradient(135deg, #eaf0ff, #f7fbff 55%, #ffffff);
  padding: 88px 0 72px;
}

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

.badge {
  display: inline-block;
  background: #dce7ff;
  color: #2449af;
  border-radius: 999px;
  padding: 5px 12px;
  font-size: 13px;
}

.hero h1 {
  margin: 14px 0 14px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.2;
}

.hero p {
  color: var(--muted);
}

.hero-actions {
  margin-top: 26px;
  display: flex;
  gap: 12px;
}

.btn {
  text-decoration: none;
  border-radius: 8px;
  padding: 10px 18px;
  font-weight: 600;
  font-size: 14px;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
}

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

.btn-secondary {
  background: #edf2ff;
  color: #2647a8;
}

.section {
  padding: 72px 0;
}

.section-alt {
  background: #fbfcff;
}

h2 {
  margin-top: 0;
  margin-bottom: 16px;
  font-size: clamp(24px, 3vw, 34px);
}

.lead {
  max-width: 840px;
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 16px;
}

.stats {
  margin-top: 24px;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
}

.services,
.cases {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  box-shadow: var(--card-shadow);
}

.card strong {
  display: block;
  font-size: 30px;
  color: var(--primary);
}

.stats .card strong {
  font-size: 20px;
  overflow-wrap: anywhere;
}

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

.card h3 {
  margin-top: 0;
  margin-bottom: 8px;
  font-size: 19px;
}

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

.list {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
}

.list li {
  margin: 8px 0;
}

.contact {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 20px;
}

.contact-card {
  background: #f0f5ff;
  border: 1px solid #d9e5ff;
  border-radius: 12px;
  padding: 20px;
}

.footer {
  background: #0f172a;
  color: #c4cfdf;
  text-align: center;
  padding: 24px 0;
}

.footer p {
  margin: 0;
  font-size: 14px;
}

.tips {
  margin-top: 8px;
  color: #8ca1c3;
}

@media (max-width: 860px) {
  .nav {
    flex-direction: column;
    justify-content: center;
    padding: 10px 0;
  }

  .nav nav {
    margin-top: 8px;
  }

  .nav nav a {
    margin: 0 8px;
  }

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

  .section {
    padding: 56px 0;
  }
}