*,ul{
    padding: 0;
    margin: 0;
    box-sizing: border-box;
    font-size: 1rem;
}
a{
    text-decoration:none
}
ul li{
    list-style: none;
}
p {
    display: block;
    margin-block-start: 0em;
    margin-block-end: 0em;
    margin-inline-start: 0px;
    margin-inline-end: 0px;
}
body{
    padding: 0;
    margin: 0;
    background-image: url("../images/bg.jpg");
    background-repeat: no-repeat;
    background-size: cover;
     background-position: center 0; 
     background-repeat: no-repeat;  
     background-attachment: fixed; 
      -webkit-background-size: cover;  
      -o-background-size: cover;  
      -moz-background-size: cover;  
      -ms-background-size: cover;
      position: relative;
}
/* pc端中间部分 */
.pc-main{
    width: 100vw;
    height:100vh;
    /* box-shadow: 0px 0px 20px rgb(255, 255, 255); */
    overflow: auto;
    box-sizing: border-box;
    position: relative;
    /* margin: 0 auto; */
    display: flex;
    /* border-radius: 15px; */
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.pc-main .pc-left{
    width: 24%;
    height: 100%;
    box-sizing: border-box;
    height: 100%;
    border: 1px solid rgb(255, 255, 255);
    background-color: rgb(0, 0, 0);
    opacity:0.7;
    margin: 0 auto;
}
.pc-main .pc-middle{
    width: 24%;
    height: 100%;
    box-sizing: border-box;
    height: 100%;
    border: 1px solid rgb(255, 255, 255);
    background-color: rgb(0, 0, 0);
    opacity:0.7;
    margin: 0 auto;
}
.pc-main .pc-middle2{
    width: 24%;
    height: 100%;
    box-sizing: border-box;
    height: 100%;
    border: 1px solid rgb(255, 255, 255);
    background-color: rgb(0, 0, 0);
    opacity:0.7;
    margin: 0 auto;
}
.pc-main .pc-right{
    box-sizing: border-box;
    width: 24%;
    height: 100%;
    border: 1px solid rgb(255, 255, 255);
    background-color: rgb(0, 0, 0);
    opacity:0.7;
    margin: 0 auto;
}