.sub .c_box {    display: inline-block;    vertical-align: top;
    width: 47%; margin-right:5%;}
.sub .c_box:last-child {margin-right:0;}
.sub .c_box h3 {    font-size: 28px;
    font-weight: 500;
    margin-bottom: 20px;
    letter-spacing: -1px; color:#2e3192;}
.sub .c_box h3:before {content:''; display:inline-block; width:20px; height:3px; background:#2e3192; margin-bottom:10px; margin-right:5px;}
.sub .c_box > ul  {    padding: 30px;
    border: 2px dashed #ccc;
    border-radius: 30px;
    min-height: 510px;}
.sub .c_box > ul > li {
    font-size: 18px;
    font-weight: 300;
    background: url(/app/dubu_sourcecode/docs/imgs/1593089877_ch.png) no-repeat 0 5.5px;
    padding-left: 20px;
        letter-spacing: -1px;
    margin-bottom:10px;
 
}

.sub .c_box > ul > li > ul{margin:5px;}
.sub .c_box > ul > li > ul > li:before {content:''; display:inline-block; width:2px; height:2px; background:#333; margin-bottom:5px; margin-right:5px;}
/* tablet */
@media screen and (min-width:768px) and (max-width:991px){
}

/* mobile */
@media screen and (max-width:767px){
    .sub .c_box  {width:100%; margin-right:0; margin-bottom:50px;}
    .sub .c_box > ul  {min-height: inherit}
}