*{
    margin: 0;
    padding: 0;
}
.c-main{
    width: 870px;
    margin: 0 auto;
    font-family: "微软雅黑";
}
.c-top{
    color: #4873b5;
    line-height: 17px;
    font-size: 18px;
    padding: 50px 0 45px 0;
}
.c-top img{
    float: left;
    margin-right: 10px;
}
.c-box{
    margin-bottom: 30px;
}
.c-head{
    background: #f1f1f1;
    padding: 0 35px;
    height: 69px;
    line-height: 69px;
    font-size: 16px;
    cursor: pointer;
    position: relative;
}
.c-head span{
    position: absolute;
    width: 22px;
    height: 12px;
    top: 28px;
    right: 35px;
    background: url("../images/arrow.png");
}
.c-text{
    display: none;
    font-size: 12px;
    line-height: 40px;
    background: #f8f8f8;
    padding:20px 35px;
}
.active .c-text{
    display: block;
}
.active .c-head{
    background: #8898de;
    color: #fff;
}
.active .c-head span{
    background: url("../images/arrow-a.png");
}