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

body {
  background-color: #f9f9f9;
  color: #333;
  line-height: 1.6;
}

/* 顶部导航 */
.navbar {
  background: #0b74de;
  color: white;
  padding: 15px 0;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 85%;
  margin: auto;
}
.navbar ul {
  list-style: none;
  display: flex;
}
.navbar li {
  margin-left: 20px;
}
.navbar a {
  color: white;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
}
.navbar a:hover {
  color: #ffeb3b;
}

/* 横幅 */
.hero {
  background: linear-gradient(to right, #0b74de, #2a9df4);
  color: white;
  height: 80vh;
  display: flex;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 0 15px;
}
.hero h2 {
  font-size: 2.5em;
  margin-bottom: 15px;
}
.hero p {
  font-size: 1.1em;
  margin-bottom: 25px;
}
.btn {
  display: inline-block;
  padding: 10px 25px;
  background: white;
  color: #0b74de;
  border-radius: 25px;
  font-weight: bold;
  transition: background 0.3s;
}
.btn:hover {
  background: #ffeb3b;
}

/* 通用区块 */
.section {
  padding: 80px 0;
}
.section h2 {
  text-align: center;
  margin-bottom: 30px;
  font-size: 2em;
}
.container {
  width: 85%;
  margin: auto;
}
.bg-light {
  background: #f4f6f8;
}

/* 服务卡片 */
.services {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
}
.card {
  background: white;
  padding: 25px;
  margin: 10px;
  width: 300px;
  border-radius: 10px;
  box-shadow: 0 3px 8px rgba(0,0,0,0.1);
  transition: transform 0.3s;
}
.card:hover {
  transform: translateY(-5px);
}

/* 联系方式 */
.contact-info {
  list-style: none;
  text-align: center;
  margin-top: 20px;
}
.contact-info li {
  margin-bottom: 10px;
  font-size: 1.1em;
}

/* 页脚 */
footer {
  background: #0b74de;
  color: white;
  text-align: center;
  padding: 15px 0;
  font-size: 0.9em;
}
footer a {
  color: white;
  text-decoration: none;
}
footer a:hover {
  color: #ffeb3b;
}