.m_nav {
    display: none;
    position: fixed;
    width: 100%;
    height: 100%;
    z-index: 100;
    background-color: #f5f5f5;
    overflow-y: scroll!important;
    left: 0
}

.m_nav ul {
    width: 100%;
    height: auto
}

.m_nav ul li {
    width: 100%;
    cursor: pointer;
    font-size: 20px;
    border-bottom: 1px solid #ccc
}

.m_nav ul li>a {
    display: block;
    width: 100%;
    font-size: 20px;
    padding: 15px 3%;
    position: relative;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    color: #000
}

.m_nav ul li>a i {
    width: 18px;
    height: 2px;
    right: 5%;
    -webkit-transform: translateY(-50%);
    -moz-transform: translateY(-50%);
    -ms-transform: translateY(-50%);
    -o-transform: translateY(-50%);
    transform: translateY(-50%)
}

.m_nav ul li>a i,
.m_nav ul li>a i:before {
    display: block;
    background-color: #000;
    position: absolute;
    top: 50%
}

.m_nav ul li>a i:before {
    content: "";
    opacity: 1;
    width: 2px;
    height: 18px;
    left: 50%;
    -webkit-transform: translateX(-50%) translateY(-50%);
    -moz-transform: translateX(-50%) translateY(-50%);
    -ms-transform: translateX(-50%) translateY(-50%);
    -o-transform: translateX(-50%) translateY(-50%);
    transform: translateX(-50%) translateY(-50%)
}

.m_nav ul li>p {
    display: block;
    width: 100%;
    height: 100%;
    font-size: 20px;
    padding: 15px 3%;
    position: relative;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    color: #000;
    /* padding-bottom: 0!important */
}

.m_nav ul li>p i {
    width: 18px;
    height: 2px;
    top: 49%;
    right: 5%;
    -webkit-transform: translateY(-50%);
    -moz-transform: translateY(-50%);
    -ms-transform: translateY(-50%);
    -o-transform: translateY(-50%);
    transform: translateY(-50%)
}

.m_nav ul li>p i,
.m_nav ul li>p i:before {
    display: block;
    background-color: #000;
    position: absolute
}

.m_nav ul li>p i:before {
    content: "";
    opacity: 1;
    width: 2px;
    height: 18px;
    top: 50%;
    left: 50%;
    -webkit-transform: translateX(-50%) translateY(-50%);
    -moz-transform: translateX(-50%) translateY(-50%);
    -ms-transform: translateX(-50%) translateY(-50%);
    -o-transform: translateX(-50%) translateY(-50%);
    transform: translateX(-50%) translateY(-50%)
}

.m_nav ul li.active,
.m_nav ul li.active>a {
    color: #fff
}

.m_nav ul li.active>a i {
    background-color: #fff;
    top: 50%
}

.m_nav ul li.active>a i:before {
    opacity: 0
}

.m_nav ul li.active>p {
    color: #fff;
    background-color: #000;
    padding-bottom: 15px!important
}

.m_nav ul li.active>p i {
    background-color: #fff;
    top: 50%
}

.m_nav ul li.active>p i:before {
    opacity: 0
}

.m_nav ul li dl {
    width: 100%;
    display: none;
    padding: 0 2%;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box
}

.m_nav ul li dl dd {
    position: relative
}

.m_nav ul li dl dd+dd {
    border-top: 1px solid rgba(0, 0, 0, .1)
}

.m_nav ul li dl dd a {
    display: block;
    padding: 0 4%;
    color: #000;
    width: 100%;
    height: 100%;
    line-height: 45px;
    font-size: 20px;
    border: none;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box
}

.m_nav ul li dl dd:before {
    content: "";
    opacity: 1;
    display: block;
    width: 5px;
    height: 5px;
    -webkit-border-radius: 50%;
    -moz-border-radius: 50%;
    border-radius: 50%;
    background-color: #000;
    position: absolute;
    top: 50%;
    left: 1.5%;
    -webkit-transform: translateY(-50%);
    -moz-transform: translateY(-50%);
    -ms-transform: translateY(-50%);
    -o-transform: translateY(-50%);
    transform: translateY(-50%)
}

@media only screen and (max-width:768px) {
    .m_nav ul li>a,
    .m_nav ul li>p {
        font-size: 18px
    }
    .m_nav ul li dl dd a {
        font-size: 17px
    }
}

@media screen and (max-width:520px) {
    .m_nav ul li dl {
        padding: 0 3%
    }
    .m_nav ul li dl dd a {
        padding: 0 6%
    }
    .m_search .title img {
        width: 35px;
        height: 35px
    }
    .m_search .title h3 {
        font-size: 24px;
        margin-top: 10px;
        line-height: 28px
    }
    .m_search .main .m_header_submit {
        font-size: 18px
    }
    .m_search .search_close span {
        width: 40px
    }
    .m_search .search_close h4 {
        font-size: 16px
    }
}

@media screen and (max-width:420px) {
    .index_message .index_message_main .close_index_message {
        width: 30px;
        height: 30px
    }
    .m_search .main select {
        background-position: 100% 33%
    }
    .m_search .main input,
    .m_search .main select {
        font-size: 16px;
        padding-bottom: 10px
    }
    .m_search .main .m_header_submit {
        font-size: 16px;
        padding: 10px 0
    }
    .m_search .search_close {
        margin-top: 15%
    }
    .m_search .search_close span,
    .m_search .search_close span:before {
        height: 3px;
        width: 30px
    }
    .m_search .search_close h4 {
        font-size: 14px
    }
}

@media screen and (max-width:620px) {
    .m_nav ul li>a,
    .m_nav ul li>p {
        font-size: 16px
    }
    .m_nav ul li dl dd a {
        font-size: 15px
    }
    .m_search {
        padding-bottom: 40px
    }
    .m_search .main {
        padding: 8% 4% 0
    }
    .m_search .main select {
        font-size: 18px;
        padding-bottom: 15px
    }
    .m_search .main input {
        font-size: 18px;
        padding-bottom: 20px;
        margin-top: 20px
    }
}

@media screen and (max-width:375px) {
    .m_nav ul li>a,
    .m_nav ul li>p {
        font-size: 14px;
        padding: 15px
    }
    .m_nav ul li dl dd a {
        font-size: 14px
    }
}