* {
  margin: 0;
  padding: 0;
}

a {
  text-decoration: none;
  color: #333;
}

ul {
  list-style: none;
}

.main {
  width: 100%;
  height: 490px;
}

.main .nav {
  display: flex;
  width: 100%;
  height: 100px;
  line-height: 100px;
  justify-content: center;
}

.main .nav .logo div {
  margin-right: 68px;
  width: 132px;
  height: 100px;
  font-size: 32px;
}

.main .nav a:nth-child(n+2) {
  display: block;
  margin-right: 8px;
  width: 104px;
  height: 100px;
  font-size: 18px;
  color: #333;
  text-align: center;
}

.main .nav .active div {
  background-color: #118aed;
  color: #fff;
}

.main .background {
  width: 100%;
  height: 390px;
  background: url(./background.png) center center no-repeat;
  background-size: cover;
}

.main .bottom {
  padding-top: 40px;
  padding-left: 444px;
  box-sizing: border-box;
  background-color: #3a3d41;
  width: 100%;
  height: 170px;
  font-style: 16px;
  color: #999;
  font-size: 14px;
}

.main .bottom a {
  color: #999;
}