* {
  margin: 0;
  padding: 0;
}

body {
  width: 100vw;
  height: 100vh;
  overflow-x: hidden;
}

/* 顶部导航 */
header {
  width: 80vw;
  margin: 0 auto;

  nav {
    width: 1500px;
    height: 50px;
    text-align: center;
    margin: 10px auto;
    display: flex;
    justify-content: space-around;

    a {
      text-decoration: none;
      color: #4e4e4e;
      font-size: 16px;
      font-weight: 600;
    }
  }
}

nav a:nth-child(1) {
  margin-top: 5px;
}

nav a:nth-child(2),
a:nth-child(3) {
  margin-top: 15px;
}

.Bpu,
#puC {
  margin: 0 auto;
}

/* 产品图片 */
#puci {
  width: 1500px;
  height: 600px;
  margin: 0 auto;
}

#puci img {
  display: block;
  margin: 0 auto;
  height: 600px;
}

/* 产品介绍 */
#chanpj {
  width: 1100px;
  height: 4rem;
  margin: 0 auto;
}

#chanpj p {
  text-align: center;
}

#chanpj p:first-child {
  font-size: 36px;
  color: #4292f9;
  font-weight: 500;
}

#chanpj p:nth-child(2) {
  text-align: center;
  color: #4c389c;
  font-weight: 600;
  font-size: 20px;
  margin: 10px 0px;
}

#chanpj p:nth-child(2) span {
  color: #ff9d2f;
  font-weight: 600;
  font-size: 30px;
}

#chanpj p:nth-child(3) {
  text-align: left;
  margin-top: 5px;
  line-height: 25px;
  color: #4e4e4e;
}

/* 部分页面展示 */
#Bcms {
  width: 1100px;
  height: 20px;
  margin: 250px auto 0;
  font-size: 28px;
  color: #4292f9;
  font-weight: 500;
}

#Bcmsimg {
  margin: 50px auto 0;
  width: 1100px;
}

#Bcmsimg img {
  width: 800px;
  margin-left: 150px;
}

/* 六大功能模块 */
#siXG {
  width: 1100px;
  height: 20px;
  margin: 0 auto 40px;
  font-size: 28px;
  color: #4292f9;
  font-weight: 500;
}

#sixtext {
  width: 1100px;
  margin: 0 auto;
  list-style: none;
}

#sixtext li {
  margin: 10px 0px;
}

#sixtext li:nth-of-type(odd) {
  margin-top: 30px;
  color: #4c389c;
  font-weight: 900;
}

#sixtext li:nth-of-type(even) {
  color: #4e4e4e;
}

/* 结尾部分 */
#dib {
  margin-top: 40px;
}