* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "Microsoft YaHei", sans-serif;
}

body {
  background: #f7f8fa;
  color: #333;
  line-height: 1.6;
}

/* 头部 */
header {
  background: #1e40af;
  color: #fff;
  text-align: center;
  padding: 24px 16px;
}

.logo {
  font-size: 26px;
  font-weight: bold;
  margin-bottom: 6px;
}

.domain {
  font-size: 14px;
  opacity: 0.9;
}

/* 导航 */
nav {
  background: #3b82f6;
}

.nav {
  list-style: none;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

.nav li {
  padding: 14px 20px;
}

.nav a {
  color: #fff;
  text-decoration: none;
  font-size: 16px;
}

.nav a:hover {
  text-decoration: underline;
}

/* 主体容器 */
.container {
  max-width: 1000px;
  margin: 0 auto;
  padding: 20px 16px;
}

/* 横幅 */
.banner {
  height: 180px;
  background: #dbeafe;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: #1e40af;
  margin-bottom: 24px;
}

/* 卡片 */
.card {
  background: #fff;
  border-radius: 10px;
  padding: 24px;
  margin-bottom: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.card h2 {
  color: #1e40af;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid #3b82f6;
}

.card p {
  margin-bottom: 12px;
  font-size: 15px;
}

.major-list {
  list-style: none;
}

.major-list li {
  padding: 6px 0;
  font-size: 15px;
}

/* 底部 */
footer {
  background: #1f2937;
  color: #fff;
  text-align: center;
  padding: 28px 16px;
  margin-top: 20px;
}

footer p {
  margin-bottom: 8px;
  font-size: 14px;
}