.khung{
    width: 100%;
    height: 1000px;
    position: relative;
}
.muiten{
    position: absolute;
    text-decoration: none;
    left: 10px;
    font-size: 40px;

}
.logo{
    position: absolute;
    left: 630px;
}
.chu1{
    position: absolute;
    left: 36%;
    top: 140px;
    font-size: 30px;
    color: black;
    font-weight: bold;

}
.box1{
    position: absolute;
    width: 400px;
    height: 80px;
    background-color:lightgray;
    left: 521px;
    top: 200px;
    border-radius: 60px;
    text-align: center;
}
.box1>a{
    text-decoration: none;
    line-height: 80px;
    font-size: 25px;
    color: black;
}
.box1>a:hover{
    text-decoration: underline;
}
.box2{
    position: absolute;
    width: 400px;
    height: 80px;
    background-color:lightgray;
    left: 521px;
    top: 300px;
    border-radius: 60px;
    text-align: center;
}
.box2>a{
    text-decoration: none;
    line-height: 80px;
    font-size: 25px;
    color: black;
}
.box2>a:hover{
    text-decoration: underline;
}
.imgchange{
    position: absolute;
    width: 400px;
    height: 40px;
    left: 521px;
    top: 400px;
}

.inp{
    position: absolute;
    width: 400px;
    height: 60px;
    left: 521px;
    top: 460px;
    background-color: lightgray;
    border-radius: 10px;
}
.inp1{
    position: absolute;
    width: 400px;
    height: 60px;
    left: 521px;
    top: 545px;
    background-color: lightgray;
    border-radius: 10px;
    
}
.box3{
    position: absolute;
    width: 400px;
    height: 80px;
    background-color:lightgray;
    left: 521px;
    top: 650px;
    border-radius: 60px;
    text-align: center;
}
.box3>a{
    text-decoration: none;
    line-height: 80px;
    font-size: 25px;
    color: black;
}
.box3>a:hover{
    text-decoration: underline;
    font-weight: bold;
}
.box4{
    position: absolute;
    width: 400px;
    height: 80px;
    background-color:lightgray;
    left: 521px;
    top: 750px;
    border-radius: 60px;
    text-align: center;
}
.box4>a{
    text-decoration: none;
    line-height: 80px;
    font-size: 25px;
    color: black;
}
.box4>a:hover{
    text-decoration: underline;
    font-weight: bold;
}
.chu2{
    position: absolute;
    left: 530px;
    top: 880px; 
}
.chu2>.qmk{
    text-decoration: none;
    font-size: 20px;
    color: black;
}
.chu2>.dk{
    text-decoration: none;
    font-size: 20px;
    color:blue;
    font-weight: bold;
}