*{
    margin: 0;
    padding: 0;
}
body{
    background: #fff;
}
a{
    text-decoration: none;
    cursor: pointer;
}
.clearfix {
    *zoom: 1;
}
.clearfix:after {
    display: block;
    visibility: hidden;
    clear: both;
    height: 0;
    content: '';
}
ul>li{
    list-style: none;
}
.m_sb{
    display: none;
}
.sb_wrap{
    display: block;
}
.sb_wrap{
    width: 100%;
    position: relative;
    padding-top: 30px;
    padding-bottom: 30px;
    background: url(../images/bg.png) no-repeat top center;
}
.sb_ncontent{
    width: 1240px;
    margin: 0 auto;
}
.sb_ncontent img{
    width: 100%;
}
@media (max-width: 768px) {
    .m_title img{
        display: block;
        width: 100%;
    }
    .m_sb{
        display: block;
        background: url(../images/mbg2.png) no-repeat top center;
        background-size: 100% 100%;
    }
    .sb_wrap{
        display: none;
    }
    .m_sb_wrap{
        background-color: #fff;
        background-image: url(../images/mbg1.jpg),url(../images/mbg2.png);
        background-position: top center,bottom right;
        background-repeat: no-repeat,no-repeat;
        margin-top: -1px;
        padding-bottom: 90px;
    }
    .inside_content{
        margin: 0 15px;
        background-color: #e0f0ff;
        border-radius: 15px;
        box-shadow: 2px 2px 10px #3a5b7b;
    }
    .msb_ul{
        padding-top: 10px;
    }
    .msb_ul>li{
        list-style: none;
        float: left;
    }
    .msb_ul>li>.mtitle{
        width: 100%;
        position: relative;
    }
    .msb_ul>li>.mtitle img{
        width: calc(100% + 10px);
        transform: translateX(-10px);
    }
    .msb_ul>li>.mtitle::after{
        content: '';
        position: absolute;
        top: 10px;
        right: 25px;
        width: 22px;
        height: 24px;
        background: url(../images/point.png) no-repeat top left;
        background-size: 100% 100%;
    }
    .msb_ul>li>.mcontent{
        width: 100%;
        padding: 0 15px;
        position: relative;
        box-sizing: border-box;
        display: block;
    }
    /* .msb_ul>li:nth-child(6)>.mcontent img.offscreen{
        position: static;
    } */
    /* .msb_ul>li>.mcontent img.offscreen{
        position: absolute;
        left: -9999px;
    }
    .msb_ul>li:nth-child(5)>.mcontent{
        display: block;
    } */
    .msb_ul>li>.mcontent img{
        width: 100%;
    }
    .msbzc_b{
        width: 100%;
        padding: 15px;
        box-sizing: border-box;
    }
    .msbzc_b img{
        width: 100%;
    }
}