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

body {
  font-family: "PingFang SC", "Microsoft YaHei", -apple-system, sans-serif;
  color: #2c3e50;
  line-height: 1.7;
  background: #f5f7fa;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  background: #1e3a5f;
  color: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, .15);
}

.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand { font-size: 20px; font-weight: 700; letter-spacing: 1px; }

nav a {
  color: #cdd9e5;
  text-decoration: none;
  margin-left: 28px;
  font-size: 15px;
  padding-bottom: 4px;
  border-bottom: 2px solid transparent;
  transition: color .2s, border-color .2s;
}

nav a:hover { color: #fff; }
nav a.active { color: #fff; border-bottom-color: #4aa3df; }

.hero {
  background: linear-gradient(135deg, #1e3a5f 0%, #2d5f8b 100%);
  color: #fff;
  padding: 72px 24px;
  text-align: center;
}

.hero h1 { font-size: 38px; margin-bottom: 14px; }
.hero p { font-size: 17px; color: #cdd9e5; }

main {
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 48px 24px;
  flex: 1;
}

section { margin-bottom: 40px; }

h2 {
  font-size: 24px;
  margin-bottom: 18px;
  padding-left: 12px;
  border-left: 4px solid #4aa3df;
}

p { margin-bottom: 14px; color: #3d4f63; }

.cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 24px;
}

.card {
  background: #fff;
  border-radius: 8px;
  padding: 26px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, .08);
  transition: transform .2s, box-shadow .2s;
}

.card:hover { transform: translateY(-4px); box-shadow: 0 6px 18px rgba(0, 0, 0, .12); }
.card h3 { font-size: 18px; margin-bottom: 10px; color: #1e3a5f; }
.card .price { font-size: 22px; color: #e67e22; font-weight: 700; margin-top: 12px; }

.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 20px;
}

.stat {
  background: #fff;
  border-radius: 8px;
  padding: 24px;
  text-align: center;
  box-shadow: 0 1px 4px rgba(0, 0, 0, .08);
}

.stat .num { font-size: 32px; font-weight: 700; color: #2d5f8b; }
.stat .label { color: #66788a; font-size: 14px; margin-top: 4px; }

table {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 1px 4px rgba(0, 0, 0, .08);
}

th, td { padding: 13px 16px; text-align: left; font-size: 15px; }
thead { background: #1e3a5f; color: #fff; }
tbody tr:nth-child(even) { background: #f9fbfd; }
tbody tr:hover { background: #eef4fa; }

.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 12px;
  background: #e3f0fb;
  color: #2d5f8b;
}

footer {
  background: #162a44;
  color: #8fa3b8;
  text-align: center;
  padding: 22px 24px;
  font-size: 14px;
}

@media (max-width: 600px) {
  .nav-inner { height: auto; padding: 14px 16px; flex-direction: column; gap: 10px; }
  nav a { margin: 0 10px; }
  .hero h1 { font-size: 28px; }
}