*{
    padding: 0;
    margin: 0;
}
body{
    background-color: #F8F5ED;
}
header{
    background-color: #CB997E;
    height: 120px;
    margin: 30px;
    border-radius: 20px;
}
@media screen and (max-width:768px) {
    header{ 
        height: 100px;    
    }
    
}
h1{
    color: white; 
    line-height: 120px;
    text-align: center;
    font-size: 55px;
    letter-spacing: 15px;
}
@media screen and (max-width:768px) {
    h1{ 
        line-height: 100px;
        font-size: 45px;
        letter-spacing: 0px; 
    }
    
}
h2{
    border-radius:25px;
    background-color:#A5A58D ;
    color:white ;
    line-height: 60px;
    text-align: center;
    font-size: 30px;
    letter-spacing: 15px;
    margin: 30px;
}
.introduce{
    background-color: #DDBEA9 ;
    width: 60%;
    margin: 5%;
    margin-left: 20%;
    border-radius:20px;
    text-align: center;
    font-size: 120%;
}

h3{
    line-height: 60px;
    margin: 30px;
    color: white;
    font-size: 30px;
    margin-left: 10%;
    width: 8%;
    background-color:#A5A58D ;
    text-align: center;
    border-radius: 25px;
}
h4{
    line-height: 60px;
    margin: 30px;
    color: white;
    font-size: 30px;
    margin-left: 10%;
    width: 8%;
    background-color:#A5A58D ;
    text-align: center;
    border-radius: 25px;
}
input{
    color: white;
    background-color:#DDBEA9 ;
    font-size: 30px;
    border: 0px;
    margin-left: 30px;
    border-radius:15px;
}
p{
    font-size: medium;
    text-align: center;
    width: 70%;
    margin-left: 15%;
    margin: 3%;
}
.mars{
    border-radius: 25px;
    font-size: large;
    text-align: center;
    width: 70%;
    margin-left: 15%;
    color: white;
    background-color:#B7B7A4 ;
    width: 70%;
    line-height: 60px;
}
.sta{
    color: black;
    font-size: 150%;
    text-align: center;
    width: 70%;
    margin-left: 15%;
}
.ins{
    color: black;
    font-size: 125%;
    text-align: center;
    width: 70%;
    margin-left: 15%;
}
footer{
    background-color: #CB997E;
    height: 120px;
    margin: 30px;
    border-radius: 20px;
    text-align: center;
    line-height: 120px;
    font-size: 120%;
}
.return{
    background-color: #DDBEA9;
    height: 50px;
    width: 100px;
    margin: 2%;
    margin-top: -1%;
    border-radius: 30px;
    position: fixed;
    text-align: center;
}
@media screen and (max-width:768px) {
    .return{
        height: 30px;
        width: 15%;
        margin-top: -5%;

    }
}
.return a{
    color:white;
    text-decoration: none;
    line-height: 50px;
    font-size: 150%;
}
@media screen and (max-width:768px) {
    .return a{
        line-height: 30px;
        font-size: 60%;
    }
}
.return:hover{
    text-decoration: underline;
}
.top{
    background-color: #DDBEA9;
    height: 60px;
    width: 60px;
    margin-left: 93%;
    margin-top: 3%;
    border-radius: 10px;
    text-align: center;
}
@media screen and (max-width:768px) {
    .top{
        margin-left: 90%;
        margin-top: -60%;
        height: 30px;
        width: 30px;
    }
}

.top a{
    color:white;
    text-decoration: none;
    line-height: 60px;
    font-size: 300%;
}
@media screen and (max-width:768px) {
    .top a{
        line-height: 30px;
        font-size: 120%;
    }
}

.top:hover{
    text-decoration: underline;
}