html, body {
    width: 100%;
    height: 100%;
    background: #F5F5F5;
}

.pageCenter {
    margin: 0 auto;
    width: 1100px;
    box-sizing: border-box;
}

.imgBlock {
    display: block;
    width: 100%;
}

.img {
    width: 100%;
    height: 100%;
}

.title {
    margin: 0 auto;
    width: 1000px;
    height: 98px;
}
.title img {
    margin: 0 auto;
    display: block;
    width: auto;
    height: 100%;
}

.common_btn {
    position: relative;
    margin: 0 auto;
    width: 445px;
    height: 68px;
    line-height: 68px;
    background-image: linear-gradient(270deg, #56B9F9 0%, #6B65FA 100%);
    border-radius: 40px;
    font-size: 28px;
    color: #FFFFFF;
    text-align: center;
    cursor: pointer;
}
.common_btn img {
    position: absolute;
    top: 27px;
    right: 64px;
    display: block;
    width: 10px;
    height: auto;
}

/*以上是公共样式*/

/*banner样式*/

.banner {
    position: relative;
}
.banner-box {
    position: relative;
}
.banner-btn {
    position: absolute;
    top: 8px;
    left: 0;
    right: 0;
    cursor: pointer;
    margin: 0 auto;
    display: block;
    width: 365px;
    height: 66px;
    font-size: 30px;
    font-weight: bold;
    color: #FFFEFD;
    text-align: center;
    line-height: 66px;
    background-image: linear-gradient(270deg, #56B9F9 0%, #6B65FA 100%);
    border-radius: 40px;
}
.banner-btn img {
    position: absolute;
    top: 27px;
    right: 64px;
    display: block;
    width: 10px;
    height: auto;
}

/* 要求 */
.yaoqiu {
    margin-top: 60px;
}
.yaoqiu-chart {
    width: 1100px;
    height: 470px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
}
.yaoqiu-chart-box {
    position: relative;
}
.yaoqiu-chart-box-bg {
    position: absolute;
    bottom: 40px;
    left: 0;
    right: 0;
    width: 165px;
    height: 50px;
    background: url(../images/yshj2.png) center no-repeat;
    margin: 0 auto;
}
.yaoqiu-chart-box1 {
    width: 214px;
    height: 60px;
    margin-bottom: 10px;
}
.yaoqiu-chart-box1 span {
    text-align: center;
    display: block;
    font-size: 20px;
    color: #333333;
    line-height: 30px;
}
.yaoqiu-chart-box1-span {
    padding-top: 30px;
    box-sizing: border-box;
}
.yaoqiu-chart-box2 {
    width: 214px;
    height: 348px;
    background-image: linear-gradient(224deg, #3BA8FC 0%, #0A80DC 100%);
    border-radius: 0 40px 0 0;
}
.yaoqiu-chart-box2 span:nth-child(1) {
    padding-top: 20px;
    box-sizing: border-box;
}
.yaoqiu-chart-box2 span {
    text-align: center;
    display: block;
    font-size: 22px;
    color: #FFFFFF;
    text-align: center;
    line-height: 45px;
}
.yaoqiu-chart-box3 {
    margin-top: 10px;
    width: 214px;
    text-align: center;
    font-size: 22px;
    color: #1286E1;
}
.yaoqiu-chart-box:nth-child(2) .yaoqiu-chart-box2 {
    height: 298px;
    background-image: linear-gradient(224deg, #FF8540 0%, #FA4302 100%);
    border-radius: 0 40px 0 0;
}
.yaoqiu-chart-box:nth-child(2) .yaoqiu-chart-box3 {
    color: #FB500E;
}
.yaoqiu-chart-box:nth-child(3) .yaoqiu-chart-box2 {
    height: 248px;
    background-image: linear-gradient(224deg, #10C6DE 0%, #05A2B5 100%);
    border-radius: 0 40px 0 0;
}
.yaoqiu-chart-box:nth-child(3) .yaoqiu-chart-box3 {
    color: #07AABE;
}
.yaoqiu-chart-box:nth-child(4) .yaoqiu-chart-box2 {
    height: 198px;
    background-image: linear-gradient(224deg, #7CA0FF 0%, #657DFB 100%);
    border-radius: 0 40px 0 0;
}
.yaoqiu-chart-box:nth-child(4) .yaoqiu-chart-box3 {
    color: #657DFB;
}
.yaoqiu-chart-box:nth-child(5) .yaoqiu-chart-box2 {
    height: 148px;
    background-image: linear-gradient(224deg, #FD4D4F 0%, #F21E20 100%);
    border-radius: 0 40px 0 0;
}
.yaoqiu-chart-box:nth-child(5) .yaoqiu-chart-box3 {
    color: #F52C2E;
}
.yaoqiu_btn {
    margin-top: 45px;
}

/*课程样式*/
.course {
    min-width: 1200px;
    width: 100%;
    height: auto;
    padding-top: 76px;
    padding-bottom: 60px;
    background: url(../images/yshj_bg1.jpg) center no-repeat;
    background-size: 100%;
    box-sizing: border-box;
}
.course .pageCenter {
    position: relative;
    width: 1120px;
    height: 640px;
}
.course_tab_line {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    margin: auto;
    width: 1098px;
    height: 60px;
    box-sizing: border-box;
    border-radius: 6px;
    border: 1px solid #F21E20;
}
.course_tab {
    margin: 50px auto 30px;
    width: 1098px;
    height: 60px;
    box-sizing: border-box;
    background: #FFFFFF;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.course_tab .course_li {
    width: 366px;
    height: 60px;
    line-height: 60px;
    text-align: center;
    font-size: 26px;
    color: #F32123;
    cursor: pointer;
    z-index: 2;
}
.course_tab .active {
    width: 366px;
    height: 80px;
    line-height: 80px;
    text-align: center;
    font-size: 26px;
    color: #F32123;
    background-image: linear-gradient(269deg, #FD5B5C 0%, #F21E20 100%);
    border-radius: 6px;
    color: #FFFFFF;
}
.course_box {
    width: 100%;
    margin-top: 22px;
    height: auto;
}
.course_box .course_ul {
    display: none;
}
.course_box_cont {
    width: 1100px;
    margin: 10px auto;
    position: relative;
}
.course_box_cont .course_box_table1 {
    width: 100%;
    text-align: center;
    background: #FFFFFF;
    box-shadow: 0 0 10px 0 rgba(247,130,131,0.41);
    border-radius: 8px;
    overflow: hidden;
    font-size: 20px;
    color: #333333;
    text-align: center;
}
.course_box_cont .course_box_table1 tr {
    height: 108px;
    border-bottom: 1px solid #FFC6C6;
}
.course_box_cont .course_box_table1 tr:last-child {
    border-bottom: 0;
}
.course_box_cont .course_box_table1 tr:first-child {
    font-size: 24px;
    color: #333333;
    text-align: center;
    font-weight: 500;
    height: 78px;
}
.course_box_cont .course_box_table1 tr td:first-child {
    width: 232px;
    font-size: 24px;
    color: #F82F2F;
    font-weight: 500;
    text-align: center;
    background: #FDE9E9;
    border-right: 0;
}
.course_box_cont .course_box_table1 tr td {
    border-right: 1px solid #FFC6C6;
}
.course_box_cont .course_box_table1 tr td:last-child {
    border-right: 0;
}
.course_box_cont .course_box_table1 tr td:nth-child(3) {
    width: 406px;
}
.course_box_kkzx {
    display: inline-block;
    width: 130px;
    height: 46px;
    line-height: 46px;
    background-image: linear-gradient(270deg, #57B8F9 0%, #6A66FA 100%);
    border-radius: 23px;
    font-size: 20px;
    color: #FFFFFF;
    text-align: center;
    cursor: pointer;
}
.course_box_jgxw {
    display: inline-block;
    width: 130px;
    height: 46px;
    line-height: 46px;
    border-radius: 23px;
    background-image: linear-gradient(270deg, #FD595B 0%, #F42A2B 100%);
    font-size: 20px;
    color: #FFFFFF;
    text-align: center;
    cursor: pointer;
}
/* 费用评估 */
.assess {
    min-width: 1200px;
    width: 100%;
    height: 552px;
    padding-top: 40px;
    background: url(../images/yshj_bg2.jpg) center no-repeat;
    background-size: 100%;
    box-sizing: border-box;
}

.assess_box {
    margin: 40px auto 0;
    width: 100%;
    height: auto;
    box-sizing: border-box;
    display: flex;
}

.assess_box .assess_container {
    width: 750px;
    height: 311px;
    background: #FFFFFF;
    box-sizing: border-box;
    padding: 20px;
}

.assess_container .assess_slide {
    width: 100%;
    height: auto;
    margin-top: 18px;
    display: flex;
}

.assess_container .assess_slide:first-child {
    margin-top: 0;
}

.assess_container .assess_slide .slide_first {
    position: relative;
    width: 139px;
    height: 54px;
    margin-right: 5px;
    background: url(../images/juxing_btn.png);
}
.assess_container .assess_slide .slide_first_span {
    display: inline-block;
    text-align: center;
    display: inline-block;
    width: 130px;
    height: 54px;
    font-size: 20px;
    color: #FFFFFF;
    line-height: 54px;
}

.assess_container .assess_slide .slide_ol {
    display: inline-block;
    height: auto;
    vertical-align: middle;
}

.assess_container .assess_slide .slide_ol .slide_li {
    float: left;
    width: 130px;
    height: 54px;
    font-size: 20px;
    color: #333333;
    text-align: center;
    line-height: 54px;
    margin-right: 15px;
    background: #FFFFFF;
    border: 1px solid #C5C3C3;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    cursor: pointer;
}

.assess_container .assess_slide .slide_ol .slide_li:last-child {
    margin-right: 0px;
}

.assess_container .assess_slide .slide_ol .slide_li:hover {
    border: 1px solid #F21F21;
}

.assess_container .assess_slide .slide_ol .slide_li.on {
    color: #fff;
    background: #F21F21;
    border: 1px solid #F21F21;
}

.assess_box .assess_slide_right {
    width: 350px;
    height: 311px;
    padding-top: 40px;
    text-align: center;
    font-size: 0;
    box-sizing: border-box;
    background: url(../images/yshj_bd.jpg) center no-repeat;
}

.assess_slide_right .assess_tel {
    display: inline-block;
    width: 285px;
    height: 55px;
    border-radius: 6px;
    padding: 18px 10px;
    box-sizing: border-box;
    border: 0;
    outline: none;
    font-size: 18px;
    line-height: 55px;
    background: #FFFFFF;
    box-sizing: border-box;
    vertical-align: middle;
}

.assess_slide_right input[type="text"]::placeholder {
    color: #BBBABA;
}

.assess_slide_right .right_second {
    display: inline-block;
    width: 285px;
    height: auto;
    margin-top: 18px;
}

.assess_slide_right .right_second .assess_code {
    display: inline-block;
    width: 164px;
    height: 55px;
    border: 0;
    outline: none;
    font-size: 18px;
    line-height: 55px;
    border-radius: 6px;
    background: #FFFFFF;
    box-sizing: border-box;
    padding: 10px 18px;
    vertical-align: middle;
}

.assess_slide_right .right_second .assess_code_img {
    display: inline-block;
    width: 107px;
    height: 55px;
    line-height: 55px;
    margin-left: 14px;
    background: #FFFFFF;
    border-radius: 6px;
    overflow: hidden;
    vertical-align: middle;
    cursor: pointer;
}

.assess_slide_right .assess_submit {
    margin-top: 17px;
    display: inline-block;
    width: 289px;
    height: 60px;
    line-height: 60px;
    background-image: linear-gradient(270deg, #58B6FA 2%, #6A68FA 100%);
    border-radius: 39px;
    font-size: 28px;
    color: #78220B;
    text-align: center;
    line-height: 60px;
    color: #FFFFFF;
}

.assess_slide_right .assess_submit_select {
    background: #d8d8d8;
    color: #807c7b;
}

.assess_box .assess_right_p {
    padding-top: 18px;
    font-size: 16px;
    color: #FFFFFF;
    letter-spacing: 0;
    text-align: center;
}

/* 寒假备考 */
.exam {
    min-width: 1200px;
    width: 100%;
    height: 531px;
    box-sizing: border-box;
    margin-top: 80px;
}
.exam_box ul {
    margin-top: 40px;
    width: 1100px;
    display: flex;
}
.exam_box ul li {
    width: 148px;
    height: 348px;
    margin-right: 20px;
    border-radius: 10px;
    cursor: pointer;
    overflow: hidden;
}

.exam_box ul li:nth-child(1) {
    width: 594px;
    background: url(../images/yshj_bg3.png) 100% center no-repeat;
}
.exam_box ul li:nth-child(2) {
    background: url(../images/yshj_bg4.png) 100% center no-repeat;
}
.exam_box ul li:nth-child(3) {
    background: url(../images/yshj_bg5.png) 100% center no-repeat;
}
.exam_box ul li:nth-child(4) {
    margin-right: 0;
    background: url(../images/yshj_bg6.png) 100% center no-repeat;
}
.exam_box_open {
    width: 594px;
    margin-top: 128px;
    height: 220px;
    display: flex;
    color: #FFFFFF;
    font-size: 17px;
}
.exam_box_open_box1 {
    padding-left: 36px;
    width: 406px;
    box-sizing: border-box;
}
.exam_box_open_box1 p {
    position: relative;
    margin-top: 6px;
}
.exam_box_open_box1 p:nth-child(1) {
    font-size: 26px;
    margin-left: 30px;
}
.exam_box_open_box1 p:nth-child(2), .exam_box_open_box1 p:nth-child(4) {
    margin-top: 14px;
    font-size: 20px;
    font-weight: 500;
}
.exam_box_open_box1 p:nth-child(1)::before {
    position: absolute;
    top: -4px;
    left: -46px;
    content:'';
    display: block;
    width: 37px;
    height: 37px;
}
.exam_box_open_p1::before {
    background: url(../images/yshj3.png) center no-repeat;
    background-size: 100%;
}

.exam_box_open_p2::before {
    background: url(../images/yshj4.png) center no-repeat;
    background-size: 100%;
}
.exam_box_open_p3::before {
    background: url(../images/yshj5.png) center no-repeat;
    background-size: 100%;
}
.exam_box_open_p4::before {
    background: url(../images/yshj6.png) center no-repeat;
    background-size: 100%;
}
.exam_box_open_box1 p:nth-child(2)::before, .exam_box_open_box1 p:nth-child(4)::before {
    position: absolute;
    top: 11px;
    left: -14px;
    content:'';
    display: block;
    width: 7px;
    height: 7px;
    background: #FFFFFF;
    border-radius: 50%;
}
.exam_box_open_box2 {
    width: 188px;
}
.exam_box_open_box2 span {
    margin: 150px auto 0;
    display: block;
    width: 150px;
    height: 46px;
    line-height: 46px;
    text-align: center;
    background-image: linear-gradient(270deg, #57B8F9 0%, #6A66FA 100%);
    border-radius: 23px;
    font-size: 20px;
}
.exam_box_close {
    margin-top: 226px;
    text-align: center;
    font-size: 26px;
    color: #FFFFFF;
}

/* 考情速递 */
.kaoqing {
    min-width: 1200px;
    width: 100%;
    height: 700px;
    box-sizing: border-box;
    margin-top: 10px;
    background: url(../images/yshj_bg4.jpg) 100% center no-repeat;
}
.kaoqing .pageCenter {
    margin-top: 50px;
}
.kaoqing_box ul {
    width: 1100px;
    height: 382px;
    background: #FFFFFF;
    box-shadow: 0 0 10px 0 rgba(248,47,47,0.31);
    border-radius: 6px;
    display: flex;
    flex-wrap: wrap;
}
.kaoqing_box ul li {
    width: 219px;
    height: 190px;
    text-align: center;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-flow: column;
    border-right: 1px solid #D6DADE;
    border-bottom: 1px solid #D6DADE;
    cursor: pointer;
    font-size: 28px;
    color: #333333;
}
.kaoqing_box ul li:nth-child(5n) {
    border-right: 0;
}
.kaoqing_box ul li:nth-child(n+6) {
    border-bottom: 0;
}
.kaoqing_box ul li img {
    display: block;
}
.kaoqing_box ul .active {
    background: #FFFFFF;
    box-shadow: 0 0 10px 0 rgba(250,174,174,0.66);
    border-radius: 6px 0 0 0;
}

/* 合作伙伴样式 */
.partner {
    padding-top: 30px;
    min-width: 1200px;
    width: 100%;
    height: 678px;
    box-sizing: border-box;
    background: url(../images/yshj_bg5.jpg) center no-repeat;
    background-size: 100%;
}
.partner .title {
    width: 866px;
}
.partner .swiper-container {
    width: 1100px;
    height: 315px;
}
.partner .swiper-slide {
    text-align: center;
    display: flex;
    align-items: center;
    transition: 300ms;
    transform: scale(0.8);
}
.partner .swiper-slide img {
    width: 100%;
}
.partner .swiper-slide-active, .partner .swiper-slide-duplicate-active{
    transform: scale(1);
}

/* 旋转木马轮播样式 */
.poster_box {
    overflow: hidden;
    margin: 46px 20px 0;
}
.poster_box h2 {
    font-size: 30px;
    color: #015293;
    font-weight: bold;
    text-align: center;
}
.poster_box h3 {
    font-size: 16px;
    color: #015293;
    margin: 10px 0 35px;
    text-align: center;
}
.poster-main {
    position: relative;
    width: 100%;
    height: 340px!important;
    margin-left: auto;
    margin-right: auto;
}
.poster-main img {
    display: block;
}

.poster-main a, .poster-main img {
    display: block;
    width: 100%;
    height: 100%;
}
.poster-main .poster-list {
    width: 1000px;
    height: 500px;
}
.poster-main .poster-list .poster-item {
    width: 200px;
    height: 500px;
    position: absolute;
    left: 0;
    top: 0;
}
.poster-main .poster-list .poster-item .item {
    position: relative;
    width: 100%;
    height: 100%
}
.poster-main .poster-btn {
    position: absolute;
    top: 0;
    cursor: pointer;
    filter: opacity(.5) brightness(1);
    width: 34px;
    height: 34px;
}
/* .poster-main .poster-btn:hover {
    filter: opacity(1) brightness(2);
} */
.poster-main .poster-prev-btn {
    left: -57px;
    top: 137px;
    background: url(../images/left.png) no-repeat center center;
}
.poster-main .poster-next-btn {
    right: -57px;
    top: 137px;
    background: url(../images/right.png) no-repeat center center;
}
.poster-item-title {
    background:rgba(42, 42, 42, 0.8) none repeat scroll 0 0 !important;/*实现FF背景透明，文字不透明*/
    filter:Alpha(opacity=80); background:#2a2a2a;
    color: #FFF;
    width: 100%;
    height: 52px;
    line-height: 52px;
    position: absolute;
    bottom: 0;
    text-indent: 29px
}
.lunbo_btn {
    height: 15px;
    width: 100%;
    margin: 0px auto;
    position: absolute;
    z-index: 3;
    text-align: center; 
    bottom: 2px;
}
.lunbo_btn li {
    width: 14px;
    height: 14px;
    display: inline-block;
    background-color: #b4b5b7;
    border-radius: 50%;
    margin: 0px 2px;
    cursor: pointer;
}
.lunbo_btn li.poster-btn-active {
    background-color: #0b518a;
}

.partner_a {
    margin: 0 auto;
    width: 372px;
    height: 79px;
    background: url(../images/an2.png) center no-repeat;
    font-family: SourceHanSansCN-Bold;
    font-size: 30px;
    line-height: 68px;
    color: #FFFFFF;
    letter-spacing: 0.88px;
    text-align: center;
}

/*图书样式*/
.book {
    min-width: 1200px;
    width: 100%;
    height: auto;
    padding: 40px 0px 88px;
    box-sizing: border-box;
}
.book-box {
    width: 1098px;
    margin: 0 auto;
    background: #FFFFFF;
    box-shadow: 0 0 10px 0 rgba(253,33,33,0.18);
    border-radius: 10px 10px 0 0;
}
.book-box .title {
    padding-top: 30px;
}
.book-box .pageCenter {
    width: 1098px;
}
.book_img {
    display: block;
    margin: 44px auto 0px;
    width: 1098px;
}

.book_a {
    margin: 34px auto 0px;
    width: 372px;
    height: 79px;
    background: url(../images/an2.png) center no-repeat;
    font-family: SourceHanSansCN-Bold;
    font-size: 30px;
    line-height: 68px;
    color: #FFFFFF;
    letter-spacing: 0.88px;
    text-align: center;
}

/*校区环境样式*/
.campus {
    min-width: 1200px;
    width: 100%;
    height: 825px;
    padding-top: 65px;
    background: url('../images/bg3.png') center center no-repeat;
    box-sizing: border-box;
}
.campus .title {
    width: 866px;
}
.campus_box {
    margin: 48px auto 0;
    width: 1000px;
    height: 554px;
}

/* 悬浮栏 */
.left-menu {
    position: fixed;
    top: 50%;
    left: 0;
    margin-top: -255px;
    width: 130px;
    height: 504px;
    z-index: 999;
    background: #FFFFFF;
}
.left-menu ul li {
    margin: 0 auto;
    padding-top: 10px;
    box-sizing: border-box;
    width: 123px;
    height: 84px;
    text-align: center;
    border-bottom: 1px solid #ECE9E9;
    position: relative;
}
.left-menu ul li::after{
    position: absolute;
    content: "";
    width: 30px;
    height: 60px;
    top: 24px;
    right: -16px;
}
.left-menu ul li:last-child {
    border-bottom: 0;
}
.left-menu ul li img {
    margin: 0 auto;
    display: block;
    width: 40px;
    height: 40px;
}
.frame-box {
    position: absolute;
    top: 20px;
    left: 130px;
    width: 256px;
    height: 214px;
    box-sizing: border-box;
    padding-left: 20px;
}
.frame-box-container {
    background: #FFFFFF;
    box-shadow: 0 0 7px 0 rgba(0,0,0,0.14);
    border-radius: 8px;
    box-sizing: border-box;
    padding-bottom: 16px;
}
.frame-box-title {
    width: 100%;
    height: 46px;
    line-height: 46px;
    background: #F93938;
    border-radius: 8px 8px 0 0;
    font-size: 18px;
    color: #FFFFFF;
    text-align: center;
    position: relative;
}
.frame-box-title:before {
    position: absolute;
    content: "";
    width: 0;
    height: 0;
    top: 12px;
    left: -10px;
    border-top: solid 10px transparent;
    border-right: solid 10px #F93938;
    border-bottom: solid 10px transparent;

}
.frame-box-cont input {
    margin-top: 14px;
    width: 206px;
    height: 35px;
    border: 1px solid #B4B2B2;
    border-radius: 5px;
    padding: 10px;
    box-sizing: border-box;
}
.frame-box-cont-yzm {
    margin-top: 14px;
    justify-content: center;
    display: flex;
}
.frame-box-cont .frame-box-cont-yzm input {
    margin: 0;
    width: 116px;
}
.frame-box-cont .frame-box-cont-yzm .yzm-div {
    width: 80px;
    margin-left: 10px;
    border-radius: 5px;
}
.frame-box-cont .frame-box-cont-yzm .yzm-div img {
    display: block;
    width: 100%;
    height: 100%;
    border-radius: 5px;
}
.frame-box-cont input::placeholder {
    font-size: 14px;
    color: #B1AEAE;
}
.frame-box-cont-btn {
    margin: 14px auto 0;
    width: 206px;
    height: 40px;
    line-height: 40px;
    background-image: linear-gradient(-89deg, #FF5655 0%, #F93938 100%);
    border-radius: 5px;
    font-size: 16px;
    color: #FFFFFF;
    text-align: center;
    cursor: pointer;
}
.frame-box-hide {
    display: none;
}
.left-menu ul li p {
    font-size: 16px;
    color: #333333;
}
.left-menu ul li:last-child p {
    font-weight: 500;
    color: #F93F3D;
}
.left-menu ul li .ztlx-img {
    margin-top: 8px;
    margin-bottom: 8px;
    display: block;
    width: 176px;
    height: 176px;
}
.left-menu ul li .ztlx-word {
    font-size: 18px;
    color: #333333;
    text-align: center;
}
.left-menu ul li .frame-box-wxkf {
    width: 175px;
    height: 155px;
}
.left-menu ul li .frame-box-container-wxkf {
    width: 155px;
    height: 155px;
    background: #FFFFFF;
    position: relative;
}
.left-menu ul li .frame-box-container-wxkf:before {
    position: absolute;
    content: "";
    width: 0;
    height: 0;
    top: 12px;
    left: -10px;
    border-top: solid 10px transparent;
    border-right: solid 10px #FFFFFF;
    border-bottom: solid 10px transparent;
}
.left-menu ul li .wxkf-img {
    width: 155px;
    height: 155px;
    box-sizing: border-box;
    padding: 12px;
}
.left-menu ul li:hover .frame-box-hide {
    display: block;
}