.big-div{
    text-align: center;
    padding: 55px
}
#cards-div{
    background-color: #F9F9F9;
}
.card-head{
    text-align: center;
    margin: 0 auto
}
.red-circle{
    padding: 35px;
    text-align: center;
    margin-top: 20px;
    width: 120px;
    height: 120px;
    background-color: #d3433e;
    border-radius: 60px;
    -moz-border-radius: 60px;
    -webkit-border-radius: 60px
}
.red-circle-word{
    margin: 0 auto;
    color: white
}
#introduction-div{
    background-color: black;
}
.introduction-font{
    color: white;
}
.step-div{
    height: 80px;
}
.step-number{
    float: left;
    text-align: center;
    padding: 10px;
    margin-right: 5px;
    width: 60px;
    height: 60px;
    background-color: #d3433e;
}
.title-in{
    font-size: 20px;
    margin: 0 auto;
}
.context-in{
    font-size: 15px;
    margin: 0 auto;
}
#link-us{
    padding: 25px;
    text-align: center;
}
.link-item {
    padding-top: 20px;
    background-color: rgba(128,128,128,0.5);
}
#fixed-div{
    position: fixed;
    right: -146px;
    z-index: 9999999;
    height: 224px;
    width: 200px;
    top: 25%;
    overflow: hidden;
}
.link{
    display: block;
    width: 200px;
    height: 57px;
    text-indent: 54px;
    margin-top: 1px;
    line-height: 50px;
    font-size: 18px;
    color: white;
}