.nav-childrens {
    display: flex;
    list-style: none;
    padding: 20px 0 35px 0px;
    margin: 0;
}


    .nav-childrens .nav-group {
        min-width: 235px;
        position: relative;
    }

        .nav-childrens .nav-group.nav-group-wrap {
            padding: 36px 0 0 0;
        }

        .nav-childrens .nav-group .first-name {
            font-size: 20px;
            display: block;
            font-family: Microsoft YaHei;
            font-weight: 400;
            color: #333333;
            text-decoration: none;
            padding-left: 40px;
            padding-bottom: 5px;
            line-height: 30px;
        }

        .nav-childrens .nav-group .second-group-name {
            font-size: 16px;
            display: block;
            font-family: Microsoft YaHei;
            font-weight: 400;
            color: #333333;
            text-decoration: none;
            padding-left: 40px;
            padding-bottom: 7px;
            padding-top: 9px;
        }

        .nav-childrens .nav-group .second-list {
            display: flex;
            flex-direction: column;
            list-style: none;
            margin: 0 0 18px;
            padding: 0;
        }

            .nav-childrens .nav-group .second-list:nth-last-of-type(1) {
                margin-bottom: 0px;
            }

        .nav-childrens .nav-group .online-box {
            position: absolute;
            width: 100%;
            bottom: 0px;
            left: 0px;
        }

        /*.nav-childrens .nav-group.height-region .second-list {*/
        /*    height: 175px;*/
        /*}*/

        .nav-childrens .nav-group .second-list.flex-wrap {
            flex-wrap: wrap;
        }

        .nav-childrens .nav-group .second-list {
            padding-left: 40px;
        }

        .nav-childrens .nav-group.nav-border-left {
            border-left: 1px solid #F2F2F2;
        }


        .nav-childrens .nav-group .second-list .second + .second {
            /*margin-top: 5px;*/
        }

        .nav-childrens .nav-group .second-list .second a {
            font-size: 14px;
            /*color: #333333;*/
            display: inline-block;
            font-family: Microsoft YaHei;
            font-weight: 400;
            color: #7C7C7C;
            text-decoration: none;
            line-height: 28px;
        }

            .nav-childrens .nav-group .second-list .second a:hover {
                color: #4C9ED9;
            }

        .nav-childrens .nav-group .ad-list {
            list-style: none;
            margin: 0;
            padding: 20px 0 0 0;
        }

            .nav-childrens .nav-group .ad-list .ad + .ad {
                margin: 15px 0 0 0;
            }

            .nav-childrens .nav-group .ad-list .ad img {
                width: 208px;
                height: 102px;
                background: #919191;
                box-shadow: 0px 0px 18px 0px rgba(95, 95, 95, 0.15);
                border-radius: 8px;
            }

    .nav-childrens .online-box .tip {
        font-size: 14px;
        font-family: Microsoft YaHei;
        font-weight: 400;
        color: #666666;
        text-align: center;
    }

    .nav-childrens .online-box .btn-online {
        width: 103px;
        height: 30px;
        display: flex;
        justify-content: center;
        align-items: center;
        background: #4C9ED9;
        border-radius: 5px;
        font-size: 14px;
        font-family: Microsoft YaHei;
        font-weight: 400;
        color: #FFFFFF;
        display: flex;
        margin: 0 auto;
        border: none;
        outline: none;
        margin-top: 15px;
    }





    .nav-childrens .nav-group .second-list {
        display: block
    }

        .nav-childrens .nav-group .second-list.flex-wrap {
            padding-right: 10px;
        }

            .nav-childrens .nav-group .second-list.flex-wrap .second {
                width: 50%;
                float: left;
                text-align: left;
            }

                .nav-childrens .nav-group .second-list.flex-wrap .second .second-name {
                    overflow: hidden;
                    text-overflow: ellipsis;
                    white-space: nowrap;
                    display: block;
                }

@media (max-width: 1480px) {
    .nav-childrens {
        padding: 15px 0 25px 0px;
    }

        .nav-childrens .nav-group {
            min-width: 16.6%;
        }

            .nav-childrens .nav-group .first-name, .nav-childrens .nav-group .second-list, .nav-childrens .nav-group .second-group-name {
                padding-left: 13%
            }

            .nav-childrens .nav-group .second-list {
                margin: 0 0 13px;
            }

            .nav-childrens .nav-group .ad-list .ad img {
                width: 80%;
                max-height: 90px;
                height: auto
            }

            .nav-childrens .nav-group .ad-list .ad {
                text-align: right
            }
}

@media (max-width: 1250px) {
    .nav-childrens {
        padding: 10px 0 20px 0px;
    }

        .nav-childrens .nav-group .first-name {
            font-size: 18px;
            line-height: 26px;
        }

        .nav-childrens .nav-group .first-name, .nav-childrens .nav-group .second-list, .nav-childrens .nav-group .second-group-name {
            padding-left: 10%
        }

        .nav-childrens .nav-group .second-list {
            margin: 0 0 10px;
        }

            .nav-childrens .nav-group .second-list .second a {
                font-size: 14px;
                line-height: 25px;
                letter-spacing: 0.6px;
                overflow: hidden;
                text-overflow: ellipsis;
                white-space: nowrap;
                display: block;
            }

        .nav-childrens .nav-group .second-group-name {
            font-size: 15px;
            padding-bottom: 5px;
        }
}

@media (max-width: 1100px) {
    .nav-childrens .nav-group .first-name, .nav-childrens .nav-group .second-list, .nav-childrens .nav-group .second-group-name {
        padding-left: 5%
    }

    .nav-childrens .nav-group .first-name {
        font-size: 17px;
        line-height: 25px;
    }

    .nav-childrens .nav-group .second-group-name {
        font-size: 16px;
    }

    .nav-childrens .nav-group .second-list .second a {
        font-size: 14px;
        line-height: 25px;
    }
}