.yw_head{position: fixed;top: 0;left: 0;right: 0;z-index: 10;height: 140px;transition: .3s;}
.yw_head_c{display: flex;justify-content: space-between;align-items: center;height: 100%;}
.yw_head_l>a:first-child{display: inline-block;}
.yw_head_l>a:last-child{display: none;}
.yw_head_l>a>img{height: 60px;}
.yw_head_r{display: flex;align-items: center;flex-wrap: wrap;}
.yw_head_ri{text-align: center;position: relative;height: 100%;display: flex;align-items: center;margin-left: 30px;}
.yw_head_ri>a{color: #eee;font-size: 16px;line-height: 60px;display: inline-block;height: 60px;width: 100%;padding: 0 10px;cursor: pointer;}
.yw_head_ri:last-child>a{border-right: 0;}
.yw_head_ri>span{position: absolute;bottom: 0 ;left: 50%;transform: translateX(-50%);height: 2px;background-color: var(--base);transition: .3s;opacity: 0;width: 70px;}
.yw_head_ri:hover>a{color: #fff;}
.yw_head_a a{color: #fff;border-bottom: 2px solid #fff;font-weight: bold;}

.yw_head_white{background-color: #fff;height: 100px;}
.yw_head_white .yw_head_l>a:first-child{display: none;}
.yw_head_white .yw_head_l>a:last-child{display: inline-block;}
.yw_head_white .yw_head_ri a{color: #aaa;}
.yw_head_white .yw_head_a a{color: var(--base);border-color: var(--base);}

.yw_head_exc{position: absolute;top: 100%;left: -30px;right: -30px;z-index: 2;background-color: #fff;display: none;overflow: hidden;box-shadow: 0 1px 12px 1px #eee;}
.yw_head_exc>a{color: #666;font-size: 13px;display: block;text-align: center;height: 50px;line-height: 50px;transition: .3s;}
.yw_head_exc>a:hover{background-color: var(--base);color: #fff;}

.yw_head_la{height: 40px;width: 84px;border-radius: 10px;display: flex;align-items: center;justify-content: center;cursor: pointer;margin-left: 50px;}
.yw_head_la>img{width: 22px;}
.yw_head_la>span{margin-left: 5px;color: #bbb;}

.yw_head_lb{height: 40px;width: 44px;border-radius: 10px;display: flex;align-items: center;justify-content: center;cursor: pointer;margin-left: 10px;}
.yw_head_lb>img{width: 22px;}
.yw_head_lb>span{margin-left: 5px;color: #bbb;}

.yw_foot{background-color: #ededed;}
.yw_foot_tc{padding: 50px 0;display: flex;justify-content: space-between;}
.yw_foot_i>h1{font-size: 18px;color: #333;margin-bottom: 32px;}
.yw_foot_i>p{font-size: 14px;color: #7f7f7f;margin-top: 16px;max-width: 400px;line-height: 2;}
.yw_foot_i>a{font-size: 14px;color: #7f7f7f;margin-top: 16px;display: block;line-height: 2;}
.yw_foot_i>a:hover{color: var(--base);}
.yw_foot_i>p>img{margin-right: 10px;vertical-align: middle;}
.yw_foot_i>img{margin-right: 20px;}
.yw_foot_b{background-color: #b9b9b9;}
.yw_foot_bc{display: flex;justify-content: space-between;height: 50px;line-height: 50px;color: #fff;justify-content: center;align-items: center;}

.yw_aside{position: fixed;right: 20px;top: 40vh;}
.yw_aside_i{position: relative;cursor: pointer;transition: .3s;margin-bottom: 18px;}
.yw_aside_i>img:first-child{}
.yw_aside_i>img:last-of-type{display: none;}
.yw_aside_i:hover >img:first-child{display: none;}
.yw_aside_i:hover >img:last-of-type{display: inline;}
.yw_aside_r{position: absolute;right: calc(100% + 20px);top: 0;display: none;width: 156px;padding: 12px;background-color: #fff;box-shadow: 0 0 10px -3px var(--base);text-align: center;font-size: 15px;color: #6a6a6a;font-weight: bold;border-radius: 10px;}
.yw_aside_r>img{width: 100%;}
.yw_aside_i:hover >.yw_aside_r{display: block;}

.yw_title{text-align: center;}
.yw_title>h1{font-size: 36px;color: #333;}
.yw_title>p{font-size: 18px;color: #707070;margin-top: 24px;}
.yw_title>span{width: 50px;height: 5px;background-color: var(--base);display: inline-block;margin-top: 26px;}

.yw_cate{background-color: #fafafa;height: 100px;box-shadow: 1px 3px 8px 0px rgba(0, 0, 0, 0.21);}
.yw_cate_c{display: flex;justify-content: center;width: var(--lg);margin: 0 auto;}
.yw_cate_c>a{color: #444;font-size: 20px;line-height: 100px;height: 100px;cursor: pointer;white-space: nowrap;transition: .3s;margin: 0 40px;flex: 1;text-align: center;}
.yw_cate_c> .yw_cate_a{border-bottom: 3px solid var(--base);color: var(--base);}

.yw_nav{border-bottom: 1px solid #ddd;}
.yw_nav_c{height: 70px;display: flex;align-items: center;width: var(--lg);margin: 0 auto;}
.yw_nav_c>a{}
.yw_nav_c>span{margin: 0 10px;}
.yw_nav_c>a>img{vertical-align: middle;margin-right: 5px;}




@media screen and (max-width: 992px){
    .yw_head{height: 6rem;}
    .yw_head_c{width: 100%;height: 6rem;padding: 0 20px;}
    .yw_head_l>a>img{height: 3rem;}

    .yw_head_menu{width: 3rem;}
    .yw_head_menu>img{width: 100%;}

    .yw_head_r{position: fixed;top: 0;bottom: 0;left: 0;right: 0;background-color: #fff;flex-direction: column;padding: 50px 0;z-index: 10000;transform: translateZ(100px);display: none;margin-right: 0;}
    .yw_head_r>i{position: absolute;top: 20px;right: 20px;font-size: 30px;font-weight: bold;font-style: normal;line-height: 1;color: #666;}
    .yw_head_ri{margin: 0;padding: 0;}
    .yw_head_ri>a{width: 100%;text-align: center;color: #999;height: 5rem;line-height: 5rem;margin: 0;font-size: 1.6rem;}
    .yw_head_a>a{color: var(--base);border: 0;}
    .yw_head_ri{height: 6rem;}
    .yw_head_exc{display: none;}
    
    .yw_foot_tc{flex-direction: column;padding: 4rem 0;}
    .yw_foot_i{margin-top: 2rem;}
    .yw_foot_i>img{margin-right: 0;width: 50vw;}
    .yw_foot_i>p{margin-top: 1rem;line-height: 2;font-size: 1.4rem;}
    .yw_foot_bc{flex-direction: column;height: unset;line-height: 2;align-items: center;padding: 1rem 0;}
    .yw_foot_bc>p{text-align: center;}

    .yw_title>h1{font-size: 2.6rem;}
    .yw_title>p{font-size: 1.6rem;margin-top: 2rem;}
    .yw_title>span{margin-top: 2rem;}

    .yi_tact>img{height: 11rem;object-fit: cover;}

    .yw_cate{height:  7rem;overflow: auto;}
    .yw_cate_c{width: 100%;justify-content: flex-start;}
    .yw_cate_c>a{height: 7rem;line-height: 7rem;font-size: 1.1rem;margin: 0 1.5rem;}

    .yw_nav{padding: 0 1.5rem;overflow: auto;}
    .yw_nav_c{height: 7rem;width: 120vw;}
    .yw_nav_c>a{font-size: 1.6rem;white-space: nowrap;}
    .yw_nav_c>a>img{height: 3rem;}

}