body,html{
}
header{
    height: 50px;
    box-shadow: 0 0 5px #b7b7b7;
}
header a{
    width: 50px;
    height: 50px;
    line-height: 50px;
    text-align: center;
    display: inline-block;
    color: #000;
}
header img{
    cursor: pointer;
}
header a:hover{
    text-decoration: underline;
}

header .top_tt {
    width: 1000px;
    text-align: right;
    margin: 0 auto;
    padding:0 20px;
}

header .top_tt img {
    float: left;
    margin-top: 5px;
}

.content{
    width: 1000px;
    margin: 0 auto;
    height: 100%;
}

.title{
    margin-top: 40px;
    font-weight: bold;
    font-size: 16px;
}

.image{
    margin-top: 30px;
    width: 100%;
}

.line{
    height:1px;
    border:none;
    border-top:1px;
    margin-bottom: 20px;
}



.num{
    font-size: 28px;
    color: #8f8f8f;
    float: left;
    margin-right: 20px;
}
.question{
    font-size: 16px;
}

.answer{
    padding-left: 42px;
    margin-top: 10px;
    line-height: 34px;
    font-size: 16px;
    color: #8f8f8f;
}

footer {
    margin-top: 120px;
    position: absolute;
    margin-bottom: 30px;
    width: 100%;
    z-index: 0;
    overflow: hidden;
    min-width:1000px;
}