*{
    margin:0;
    padding: 0; 
}
h3,h4{
    color: #3396e8;
}
.file-a {
    color: #888;
    text-decoration: none;
}
.dashed {
    border-bottom: 1px dashed #ddd;
    padding: 2%;
}
.top_dashed {
    border-top: 1px dashed #ddd;
    padding: 2%;
}
.li_height25 {
    line-height: 25px;
}
.list-group-item {
    border: 1px solid #eee;
    padding: 15px 15px;
}
.lgi-unactive {
    color: #2888d7;
    background-color: #f5f5f5;
}
.color_h5 {
    color: #3396e8;
    font-weight: 700;
}
.color_p {
    color: #888888;
}

.cu_title{
    background-color: #f5f5f5;   
}
.cu_title.active{
    background-color: #3396e8;   
}
.cu_title.active a span{
    color: #fff;
}
.list-group-item:first-child {
    border-radius: 0px;
}
.cu_help_a{
    color: #888;
}
/*在添加覆盖样式*/
.list-group-item.active:hover, .list-group-item.active:focus {
    z-index: 2;
    color: #fff;
    background-color: #3396e8;
    border-color: #3396e8;
}
.help_img{
    margin: 20px auto;
    width: 100%;
}
.color_red{
    color: red;
}
.cu_help_list, .cu_help_list2{
    width: 100%;
    padding: 13px 15px;
}
.cu_help_list.active p{
    color: #3396e8;
}
.cu_help_list2.active p{
    color: #3396e8;
}   
.cu_help_list.active, .cu_help_list2.active{
   background-color: #fff;
   border-color: #eee;
}
.cu_help_list.active:hover, .cu_help_list.active:focus{
    background-color: #fff;
   border-color: #eee;
}
.cu_help_list2.active:hover, .cu_help_list2.active:focus{
    background-color: #fff;
   border-color: #eee;
}

.a1, .a2, .a3, .a4, .a5, .a6, .a7, .a8, .a9, .a10{
    display: none;
}
.b1, .b2, .b3, .b4, .b5, .b6, .b7, .b8, .b9, .b10{
    display: none;
}
.a1.active, .a2.active, .a3.active, .a4.active, .a5.active, .a6.active, .a7.active, .a8.active, .a9.active, .a10.active {
    display: block;
}
.b1.active, .b2.active, .b3.active, .b4.active, .b5.active, .b6.active, .b7.active, .b8.active, .b9.active, .b10.active {
    display: block;
}
/*vue动画*/
.fade-enter-active, .fade-leave-active {
  transition: opacity .5s;
}
.fade-enter, .fade-leave-to /* .fade-leave-active below version 2.1.8 */ {
  opacity: 0;
}
.cu_base{
    background-color: #fff;
    width: 80%;
    padding: 20px 26px;
}
.cu_font16{
    font-size: 16px;
}
.cu_help_red{
    color: #fa2f2f;
}
.cu_help_blue{
    color: #3396e8;
}
.cu_help_violet{
    color: #5064f9;
}
.cu_help_green{
    color: #35bd45;
}
.cu_copycode{
    padding: 5px 20px;
    background-color: #9dbbd1;
    border:none;
    color: #fff;
}
.cu_help_grayblue{
    color: #2c6a98;
}
#myBtn {
    display: none; /* 默认隐藏 */
    position: fixed; 
    bottom: 20px; 
    right: 30px; 
    z-index: 99; 
    border: none;
    outline: none; 
    background-color: #3485fd; /* 设置背景颜色，你可以设置自己想要的颜色或图片 */
    color: white; /* 文本颜色 */
    cursor: pointer; 
    padding: 15px; 
    border-radius: 10px; /* 圆角 */
}
 
#myBtn:hover {
    background-color: #555; 
}