.tong {
    max-width: 76rem;
    margin-left: auto;
    margin-right: auto;
    /* padding: 0 15px; */
}

html {
    /* font-size: 100px; */
    overflow-x: hidden;
}
@media screen and (max-width: 1440px) {
    .tong {
        padding: 0 15px;
    }
}
/* 
@media screen and (max-width: 1440px) {
    html {
        font-size: 80px;
    }
}

@media screen and (max-width: 800px) {
    html {
        font-size: 70px;
    }
}

@media screen and (max-width: 600px) {
    html {
        font-size: 50px;
    }
} */

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

p {
    margin: 0;
}

.fen img {
    transition-duration: .5s;
}

/* 顶部 */

.tou {
    height: 5rem;
    position: relative;
    z-index: 111;
    top: 0;
    left: 0;
    width: 100%;
    /*border-bottom: 1px solid #d3d2d2;*/
    /*background: linear-gradient(to bottom,rgba(0, 0, 0, 0.7) 10%, rgba(255, 255, 255, 0.1) 90%);*/
    background: #000000;
}

.is_sticky {
    position: fixed;
    background: #000;
    border-bottom: 1px solid transparent;
}

.tou .con {
    align-items: center;
    height: 100%;
}

.tou .con .logo {
    line-height: 5rem;
}

.tou .con .zi {
    display: flex;
    width: 57.5rem;
    height: 100%;
    line-height: 5rem;
    justify-content: space-between;
}

.tou .con .zi .ss {
    display: flex;
    position: relative;
    margin-left: 3vw;
}
.tou .con .zi .ss span{
    padding: 0 1rem ;
    color: white;
    font-size: 0.9rem;
}
.tou .con .zi .ss .zh_en{
    padding: 0 0.5rem 0 1rem;
    color: white;
    font-size: 0.9rem;
}

.tou .con .zi .ss .sea_line{
    display: flex;
    align-items: center;
    border-right:1px solid #e5e4e4 ;
    margin: 1.5rem 0;
    margin-bottom: 1.5rem !important;
}
.tou .con .zi .ss p {
    display: flex;
    align-items: center;
    line-height: 5rem;
}

.tou .con .zi .ss #formsearch {
    width: 250px;
    position: absolute;
    right: 90px;
    top: 100px;
    background: #fff;
    z-index: 111;
    display: none;
}

.tou .con .zi .ss #formsearch input {
    height: 34px;
    line-height: 34px;
    border: none;
    background: #fff;
    font-size: 14px;
    color: #333;
}

.tou .con .zi .ss #formsearch input#keyword {
    width: 200px;
    float: left;
    text-indent: 14px;
}

.tou .con .zi .ss #formsearch input#keyword::-webkit-input-placeholder {
    color: #333;
}

.tou .con .zi .ss #formsearch input#s_btn {
    width: 50px;
    float: right;
    text-align: center;
}

.tix {
    display: flex;
    justify-content: space-between;
    border-bottom: 2px solid #d3d2d2;
    padding-bottom: 2.76vw;
}

@media (max-width: 480px) {
    .tix {
        padding-bottom: 20px;
    }
}

.tix h2.bt {
    font-size: .42rem;
    color: #000000;
}

@media (max-width: 780px) {
    .tix h2.bt {
        font-size: 24px;
    }
}

.tix a.ck1 {
    width: 1.32rem;
    display: flex;
    justify-content: space-between;
    border-bottom: 3px solid #000000;
    color: #000000;
    padding-bottom: .2rem;
    align-items: center;
    position: relative;
}

.tix a.ck1:after {
    content: '';
    display: block;
    width: 56px;
    height: 3px;
    position: absolute;
    bottom: -3px;
    left: 0;
    z-index: 11;
    background: #cf000d;
}

@media (max-width: 780px) {
    .tix a.ck1 {
        width: 92px;
    }
}



/* 行业资讯 */

.c4 {
    text-align: center;
    background-image: url(../aptitude/bj.png); 
    background-size: cover;
    margin-top: 5.7vw;
}

.ap_box {
    padding: 4vw 0 3vw 0;
}

.ap_box .ap_title {
    text-align: center;
}
.ap_box .ap_title  h2{
    font-size: 48px;
    color: #000;
    font-weight: 700;
}
.ap_box .ap_title  p{
    padding-top: 20px;
    font-size: 18px;
    color: #000;
    font-weight: 600;
}
.ap_box .ap_list {
    margin-top: 3vw;
}

.ap_box .ap_list img {
   width: 100%;
}
.ap_box .ap_list li:hover img {
    transform: scale(1.05);
}
@media (max-width: 1400px) {
    .ap_box .ap_list {
     padding: 0 8.3333%;
    }

}
@media (max-width: 768px) {
    .ap_box .ap_list {
     padding: 0 ;
    }
    .ap_box .ap_list ul li{
        padding: 0 5px ;
       }
    .ap_box {
        padding: 5vw 0 5vw 0;
    }
    .c4 {
        margin-top: 7vw;
    }
}