*{
    margin: 0;
}
body{
    overflow-x: hidden;
}

.header {
  background:#f9f9f9;
  height:75px;
  box-sizing: border-box;
  width: 100vw;
  padding: 0 20vw;
  display: flex;
  justify-content: space-between;
}
.header img {
  margin-top:auto;
  width:167px;
  height:45px;
  margin-top:12px;
}
.header_r{
    /* width:500px; */
    display: flex;

}
.a_top{
    min-width:77px;
    height:75px;
    /* background:#007EFF; */
    color:#666666;
    display: flex;
    align-items: center;
    justify-content: center;
}
.a_top a{
    padding: 20px 20px;
    color: #666666;
    text-shadow: none;
    text-decoration: none;
}

.header_a{
    width:100vw;
    height:600px;
    margin:0 auto;
}
.header_b{
    width:100vw;
    height:600px;
    margin:0 auto;
}
.header_c{
    width:100vw;
    height:600px;
    margin:0 auto;
}
.header_d{
    width:100vw;
    height:600px;
    margin:0 auto;
}
.header_e{
    width:100vw;
    height:600px;
    margin:0 auto;
}
.header_f{
    width:100vw;
    height:600px;
    margin:0 auto;
}
.footer{
    background:black;
    color:white;
    display: flex;;
    align-items: center;
    justify-content: center;
    height:50px;
    width:100vw;
    font-size: 24px;
    letter-spacing: 5px;
}