.help_box{display: flex;justify-content: space-between;}

.help_menu{width: 20%;height: 100%;overflow-y: auto;padding: 40px 30px;box-sizing: border-box; }
.help_menu li, .help_menu li a{color: #333;}
.help_menu1 span{font-size: 16px;display: inline-block;}
.help_docs{list-style: inside;}
.help_docs:hover a{color: #b40026;}
.help_level_menu2{padding: 7px 0;}
.help_level_menu2 a, .help_level_menu2 span{font-size: 14px;}
.help_menu2{margin-left: 10px;display: none;}
.help_menu3{margin-left: 10px;display: none;}
.help_menu3 li{list-style: inside;margin: 5px 0 0 5px;}

.help_menu3 .help_level_menu3 a{vertical-align: top;}
.help_menu3 .help_level_menu3 a:hover{color: #b40026;}

.help_menu1 .select_box{background-color: #fff;padding: 10px;box-sizing: border-box;border-radius: 10px;border: 1px solid #e5e5e5;display: flex;justify-content: space-between;margin-bottom: 12px;}
.help_menu1 .select_box input{border: 0;outline: none;}
.help_menu1 .select_box .support_input{width: calc(100% - 30px);display: inline-block;}
.help_menu1 .select_box .support_search{width: 20px;height: 20px;background: url('/images/search.png');background-size: cover;cursor: pointer;}

.arr_right{width: 10px;height: 10px;background: url("/index/images/i_r.png") no-repeat;background-size: contain;display: inline-block;transition: transform 0.3s ease;cursor: pointer;}

.help_show{display: block;}
.help_box .mod_btn{display: none;}

.title_box{padding: 5px 10px;border-radius: 5px;}
.title_box:hover{background: #f1f1f1;}
.title_bg{background: #f1f1f1;}

.title_box .video_title{font-size: 16px;}

.rotate-90 {transform: rotate(90deg);vertical-align: middle;}

@media screen and (max-width: 768px){
    .help_box{display: block;}
    .help_menu{display: none;width: 100%;background-color: #fff;position: fixed;z-index: 9;padding: 20px 30px 150px;top: 70px;left: 0;height: 100%;}
    .help_box .mod_btn{display: block;width: 50px;height: 50px;border-radius: 100%;border: 1px solid #ddd;position: fixed;bottom: 60px;right: 20px;z-index: 10;background-color: #fff;}
    .help_box .mod_help_del{display: none;font-size: 16px;text-align: center;line-height: 50px;}
    .help_box .mod_help_btn{background: #fff url('/support/images/mod_menu.png') no-repeat;background-size: 30px 30px;background-position: center;}
}