* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #1b2430;
  background: #f4f7fb;
  line-height: 1.65;
}

a {
  color: #0b5cff;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

.topbar {
  background: #0c1f3f;
  color: #fff;
  padding: 0.55rem 0;
  font-size: 0.92rem;
}

.topbar .container {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

header {
  background: #fff;
  border-bottom: 1px solid #d9e2ef;
  position: sticky;
  top: 0;
  z-index: 10;
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 1rem;
}

.brand {
  font-weight: 700;
  font-size: 1.25rem;
  color: #0c1f3f;
}

.nav-links {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.nav-links a {
  font-weight: 500;
  color: #243b63;
}

.hero {
  background: linear-gradient(120deg, #0e2a56, #0b5cff);
  color: #fff;
  padding: 5rem 0 4.2rem;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 1rem;
}

.hero p {
  max-width: 760px;
  opacity: 0.95;
}

.btn {
  display: inline-block;
  margin-top: 1.4rem;
  background: #fff;
  color: #0b5cff;
  font-weight: 700;
  padding: 0.75rem 1.3rem;
  border-radius: 999px;
}

section {
  padding: 3rem 0;
}

.section-title {
  font-size: 1.75rem;
  margin-bottom: 1rem;
  color: #12294e;
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.2rem;
  margin-top: 1.1rem;
}

.card {
  background: #fff;
  border: 1px solid #dfe7f4;
  border-radius: 12px;
  padding: 1.2rem;
  box-shadow: 0 6px 22px rgba(15, 33, 67, 0.05);
}

.card h3 {
  margin-bottom: 0.6rem;
  color: #0e2a56;
}

.page-hero {
  background: #102954;
  color: #fff;
  padding: 3.2rem 0;
}

.content {
  background: #fff;
  border-radius: 14px;
  border: 1px solid #dfe7f4;
  padding: 1.5rem;
}

.content ul {
  margin: 0.8rem 0 0 1.2rem;
}

.content li + li {
  margin-top: 0.5rem;
}

.service-layout {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr);
  gap: 1.2rem;
  align-items: start;
}

.service-main {
  background: #fff;
  border-radius: 14px;
  border: 1px solid #dfe7f4;
  padding: 1.5rem;
}

.service-main h3 {
  margin-top: 1.3rem;
  margin-bottom: 0.6rem;
  color: #102954;
}

.service-main p + p {
  margin-top: 0.6rem;
}

.service-main ul {
  margin: 0.65rem 0 0 1.2rem;
}

.service-main li + li {
  margin-top: 0.4rem;
}

.service-side {
  display: grid;
  gap: 0.9rem;
}

.side-card {
  background: #fff;
  border: 1px solid #dfe7f4;
  border-radius: 12px;
  padding: 1rem;
  box-shadow: 0 6px 18px rgba(15, 33, 67, 0.04);
}

.side-card h4 {
  color: #102954;
  margin-bottom: 0.45rem;
}

.side-card ul {
  margin: 0 0 0 1.1rem;
}

.side-card li + li {
  margin-top: 0.35rem;
}

.side-cta {
  display: inline-block;
  margin-top: 0.7rem;
  padding: 0.55rem 0.95rem;
  border-radius: 999px;
  background: #0b5cff;
  color: #fff;
  font-weight: 600;
}

.side-cta:hover {
  text-decoration: none;
  filter: brightness(0.94);
}

footer {
  margin-top: 2rem;
  background: #0c1f3f;
  color: #f5f7ff;
  padding: 1.4rem 0;
  font-size: 0.92rem;
}

footer p + p {
  margin-top: 0.45rem;
}

@media (max-width: 700px) {
  .navbar {
    align-items: flex-start;
    flex-direction: column;
    padding: 0.8rem 0;
  }

  .hero,
  .page-hero {
    padding: 2.5rem 0;
  }

  .service-layout {
    grid-template-columns: 1fr;
  }
}