.new_top {
    width: 100vw;
    height: auto;
}


/* 搜索 */

.roof_box {
    width: 100vw;
    height: 132rem;
    z-index: 100;
    background: #ffffff;
    border: 1rem solid #ffffff;
}

.roof {
    width: 1700rem;
    height: 75rem;
    margin: 25rem auto 0;
    display: flex;
    justify-content: space-between;
}

.roof .roof_left {
    display: flex;
}

.roof .ishide {
    display: none;
}

.roof .roof_logo {
    width: 254rem;
    height: 75rem;
}

.roof .roof_logo img {
    width: 254rem;
    height: 75rem;
}

.roof .sponsor {
    width: auto;
    height: 75rem;
    margin-left: 40rem;
    display: flex;
    justify-content: space-between;
}

.roof .sponsor :first-child {
    width: 80rem;
    height: 24rem;
    background: #005ebc;
    border-radius: 4rem;
    font-size: 18rem;
    color: #ffffff;
    line-height: 24rem;
    text-align: center;
    margin-top: 28rem;
    margin-right: 10rem;
}

.roof .sponsor :last-child {
    width: auto;
    height: 40rem;
    margin-top: 28rem;
    font-size: 16rem;
    color: #000000;
    line-height: 24rem;
}

.roof .roof_right {
    display: flex;
}

.roof .roof_right .search {
    width: 448rem;
    height: 75rem;
}


/* 搜索框 */

.roof .roof_right .search .search_box {
    width: 448rem;
    height: 51rem;
    border: 1rem solid #005ebc;
    border-radius: 24.5rem;
    margin-top: 12rem;
    display: flex;
}

.roof .roof_right .search .search_box input {
    width: 300rem;
    height: 36rem;
    margin: 8rem 10rem 0 24rem;
    font-size: 18rem;
    color: #666;
    line-height: 36rem;
    background-color: rgba(255, 255, 255, 0.5);
    padding-left: 10rem;
}


/* 占位符颜色 */

input:-moz-placeholder,
textarea:-moz-placeholder {
    color: #666;
}

input:-ms-input-placeholder,
textarea:-ms-input-placeholder {
    color: #666;
}

input::-webkit-input-placeholder,
textarea::-webkit-input-placeholder {
    color: #666;
}

.roof .roof_right .search .search_box .search_img {
    width: 60.9rem;
    height: 36rem;
    background: #005ebc;
    border: 1rem solid #005ebc;
    border-radius: 17.16rem;
    margin-top: 8rem;
    text-align: center;
    line-height: 36rem;
    cursor: pointer;
    transition: all 0.2s;
}

.roof .roof_right .search .search_box .search_img:hover {
    transform: scale(1.04);
}

.roof .roof_right .search img {
    display: inline-block;
    width: 22rem;
    height: 23rem;
}

.roof .roof_right .language {
    display: block;
    width: 70rem;
    height: 19rem;
    margin: 28rem 26rem 0 42rem;
    font-size: 20rem;
    color: #005ebc;
    line-height: 19rem;
    transition: all 0.2s;
}

.roof .roof_right .language:hover {
    transform: scale(1.05);
}

.roof .roof_right .language :first-child {
    font-size: 16rem;
    color: #000000;
}


/* 参会 */

.joinbox {
    width: 100vw;
    height: 60rem;
    overflow: hidden;
}

.join {
    width: auto;
    height: 60rem;
    background: #005ebc;
    padding-left: 117rem;
}

.join ul {
    display: flex;
}

.join ul li {
    background: #005ebc;
    min-width: 98rem;
    height: 60rem;
    padding: 0 46rem;
}

.join ul li:last-child {
    width: 309rem;
    background-color: #1fa871;
}


/* .join ul li:last-child:hover {
  background-color: #6ec09f;
} */


/* .join ul li:hover {
  background-color: #2a85e0;
} */

.join ul li a {
    display: block;
    width: 100%;
    height: 60rem;
    font-size: 20rem;
    font-weight: 700;
    color: #ffffff;
    line-height: 60rem;
    position: relative;
    text-align: center;
}

ul li a:before,
ul li a:after {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 5px;
    background-color: #fff;
    -webkit-transform: scale3d(1, 1, 1);
    transform: scale3d(1, 1, 1);
}

ul li a:before {
    top: 0;
}

ul li a:after {
    bottom: 0;
}

ul li a:before,
ul li a:after {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 5px;
    background-color: #fff;
    -webkit-transform: scale3d(0, 1, 1);
    transform: scale3d(0, 1, 1);
    -webkit-transition: -webkit-transform 0.2s;
    transition: transform 0.2s;
}

ul li a:before {
    top: 0;
}

ul li a:after {
    bottom: 0;
}

ul li a:hover:before,
ul li a:hover:after {
    -webkit-transform: scale3d(1, 1, 1);
    transform: scale3d(1, 1, 1);
    -webkit-transition-timing-function: cubic-bezier(0, 1.54, .34, 1);
    transition-timing-function: cubic-bezier(0, 1.54, .34, 1);
    -webkit-transition-duration: 0.8s;
    transition-duration: 0.8s;
}


/* 导航栏图标 */


/* .join ul li .icon1:hover {
  line-height: 140rem;
  color: #fff;
  background: url(../img/navigation_icon1.png) no-repeat center 10rem;
  background-size: 33rem 33rem;
  text-decoration: none;
}
.join ul li .icon2:hover {
  line-height: 140rem;
  color: #fff;
  background: url(../img/navigation_icon2.png) no-repeat center 10rem;
  background-size: 33rem 34rem;
  text-decoration: none;
}
.join ul li .icon3:hover {
  line-height: 140rem;
  color: #fff;
  background: url(../img/navigation_icon3.png) no-repeat center 10rem;
  background-size: 26rem 35rem;
  text-decoration: none;
}
.join ul li .icon4:hover {
  line-height: 140rem;
  color: #fff;
  background: url(../img/navigation_icon4.png) no-repeat center 10rem;
  background-size: 25rem 37rem;
  text-decoration: none;
}
.join ul li .icon5:hover {
  line-height: 140rem;
  color: #fff;
  background: url(../img/navigation_icon5.png) no-repeat center 10rem;
  background-size: 31rem 37rem;
  text-decoration: none;
}
.join ul li .icon6:hover {
  line-height: 140rem;
  color: #fff;
  background: url(../img/navigation_icon6.png) no-repeat center 10rem;
  background-size: 30rem 30rem;
  text-decoration: none;
}
.join ul li .icon7:hover {
  line-height: 140rem;
  color: #fff;
  background: url(../img/navigation_icon7.png) no-repeat center 10rem;
  background-size: 33rem 33rem;
  text-decoration: none;
} */

#present a:before,
#present a:after {
    content: '';
    position: absolute;
    left: 0;
    width: 100%;
    height: 5px;
    background-color: #fff;
    -webkit-transform: scale3d(1, 1, 1);
    transform: scale3d(1, 1, 1);
}

.new_banner {
    width: 100vw;
    height: 300rem;
    background: url(../img/news_bg.png) no-repeat center;
    background-size: 100vw 300rem;
    overflow: hidden;
}

.new_banner .banner_box {
    height: 100rem;
    width: 400rem;
    margin: 113rem 0 0 110rem;
    padding-left: 13rem;
    border-left: 4rem solid #fff;
}

.new_banner .banner_box .updates {
    width: auto;
    height: 100rem;
    font-size: 44rem;
    font-weight: 800;
    color: #ffffff;
    line-height: 100rem;
    margin-left: 40rem;
    white-space: nowrap;
}

.new_banner .banner_box .four {
    height: 18rem;
    font-size: 20rem;
    font-weight: bold;
    color: #ffffff;
    line-height: 18rem;
    display: flex;
    justify-content: space-between;
}