.content{
    width: 100%;
}
.content_banner{
    width: 100%;
    height: 5.56rem;
}

.content_banner img{
    width: 100%;
    min-width: 783px;
    max-height: 100%;
    min-height: 305px;
}
.content_one{
    width: 100%;
    height: 4.42rem;
    margin-top: 1.67rem;
    background: url("../images/class_title_back.png") no-repeat;
    background-size: 100%;
    background-position: 100% 0%

}
.content_one > div{
    position: relative;
    width: 14.5rem;
    height: 4.22rem;
    margin: 0 auto;
    padding-top: 0.93rem;
}
.c_one_left{
    width: 8rem;
    height: 0.9rem;
    font-size: 0.32rem;
    line-height: 0.53rem;
}
.c_one_left span{
    display: block;
    margin-left: 0.75rem;
}
.c_one_right{
    position: absolute;
    width: 5rem;
    height: 5.1rem;
    right: 0;
    top: -1rem;
    background: url("../images/scheme_one_right.png") no-repeat;
    background-size: 100%;
    background-position: 100% 100%;
}
.content_two{
    height: 1.5rem;
    margin-top: 0.57rem;
}
.content_two >div{
    position: relative;
    width: 14.5rem;
    text-align: center;
    height: 100%;
    margin: 0 auto;
    font-size: 0.32rem;
    line-height: 0.52rem;
    letter-spacing: 3px;
    font-weight: bold;
}

.c_two_span{
    display: block;
    height: 1rem;
    background: url("../images/scheme_two_back.png") no-repeat;
    background-position: center;
}
.content_three{
    width: 100%;
    height: 7.75rem;
    background: url("../images/scheme_three_back.png") no-repeat;
    background-size: 100% 100%;
}
.content_three >div{
    width: 14.5rem;
    height: 7.75rem;
    margin: 0 auto;
}
.c_three_top{
    position: relative;
    float: right;
    width: 9.5rem;
    font-size: 0.32rem;
    line-height: 0.52rem;
    letter-spacing: 3px;
}
.c_three_top span{
    margin-top: 0.5rem;
    display: block;
}
.c_three_top div{
    position: absolute;
    background: url("../images/scheme_three_top.png") no-repeat;
    background-size: 100%;
    background-position: 100% 100%;
    width: 4.54rem;
    height: 3.87rem;
    left: -5rem;
}
.c_three_top span::before{
    content: "";
    float: left;
    margin-right: 0.25rem;
    width: 0.5rem;
    height: 0.5rem;
}
.three_span_one::before{
    background: url("../images/scheme_span_one.png") no-repeat;
    background-size: 100%;
}
.three_span_two::before{
    background: url("../images/scheme_span_two.png") no-repeat;
    background-size: 100%;
}
.three_span_three::before{
    background: url("../images/scheme_span_three.png") no-repeat;
    background-size: 100%;
}
.c_three_bot{
    position: relative;
    float: left;
    width: 9.5rem;
    font-size: 0.32rem;
    line-height: 0.52rem;
    letter-spacing: 3px;
    margin-top: 1rem;
}
.c_three_bot span{
    margin-top: 0.5rem;
    display: block;
}
.c_three_bot span::before{
    content: "";
    float: left;
    margin-right: 0.25rem;
    width: 0.5rem;
    height: 0.5rem;
}
.three_span_four::before{
    background: url("../images/scheme_span_four.png") no-repeat;
    background-size: 100%;
}
.three_span_five::before{
    background: url("../images/scheme_span_five.png") no-repeat;
    background-size: 100%;
}
.three_span_six::before{
    background: url("../images/scheme_span_six.png") no-repeat;
    background-size: 100%;
}
.c_three_bot div{
    position: absolute;
    background: url("../images/scheme_three_bot.png") no-repeat;
    background-size: 100%;
    background-position: 100%;
    width: 4.54rem;
    height: 3.87rem;
    top: -0.5rem;
    right: -4.5rem;
}
.content_four{
    width: 100%;
    background: url("../images/scheme_four_back.png") no-repeat;
    background-size: 100%;
    height: 2rem;
    margin-bottom: 0.3rem;
    overflow: hidden;
}
.content_four >div{
    width: 14.5rem;
    margin: 0.5rem auto 0;
}
.content_four span{
    display: block;
    font-size: 0.32rem;
    line-height: 0.38rem;
    text-align: center;
}