header {
    position: relative;
    /* height: 749px; */

}
.header {
    position: absolute;
    width: 100%;
    height: 80px;
    background: rgba(0, 0, 0, .3);
    display: flex;
    justify-content: center;
    z-index: 6666;
    transition: top 0.2s;
}
.head_white {
    background: #fff;
}
.navbar-brand img {
    height: 36px;
}
.navbar-collapse {
    justify-content: flex-end;
}
.nav-link {
    font-size: 16px;
    color: #fff;
    font-weight: lighter;
}
.nav-link:hover {
    color: #00a4e0;
}
.navbar-light .navbar-nav .nav-link {
    color: #FFFFFF;
    position: relative;
    height: 50px;
    padding: 0;
    max-width: 78px;
    line-height: 20px;
    margin-top: 20px;
    text-align: center;
}
.navbar-light .navbar-nav .nav-item {
    margin-left: 35px;
    position: relative;
    cursor: pointer;
}
.submenu_show .navbar-light .navbar-nav .nav-link {
    color: #333;
}
.head_white .navbar-light .navbar-nav .nav-link {
    color: #333;
}
.header .container {
    position: absolute;
    z-index: 99;
    height: 80px;
}
nav.navbar {
    padding: 0;
    height: 100%;
}
#navbarNav {
    height: 80px;
}
.navbar-nav {
    height: 100%;
}
/* .navbar-light .navbar-nav .nav-link:focus {
    color: #ffffff
} */
.submenu_show .bg_hover {
    display: block !important;
    width: 100%;
    height: 80px;
    transition: height 0.1s;
    background: rgba(255,255,255,1);
    z-index: 1;
    position: absolute;
    top: 0px;
    left: 0px;
    -webkit-animation: a_bg_hover_show 0.2s ease-out both;
    -webkit-transform-origin: 50% 0%;
}

.submenu_show .navbar-nav .nav-item.sublist_show .sub_menu_list,.head_white .navbar-nav .nav-item.sublist_show .sub_menu_list{ -webkit-animation:a_nav_item_show 0.2s ease-out both;}
.submenu_show .navbar-nav .nav-item.sublist_hide .sub_menu_list,.head_white .navbar-nav .nav-item.sublist_hide .sub_menu_list{ -webkit-animation:a_nav_item_hide 0.15s ease-out both;}

.submenu_hide,.sublist_hide { 
    pointer-events:none;
} /*避免鼠标快速移动触发鼠标对菜单收回动画延迟 一进多出显示bug*/
.submenu_hide .bg_hover { 
    -webkit-animation:a_bg_hover_hide 0.15s ease-out both; 
    -webkit-transform-origin:50% 0%;
}

@keyframes a_bg_hover_show {
	0%{ -webkit-transform:scale(1,0.5); opacity: 0;}
	100%{  -webkit-transform:scale(1,1); opacity: 1;}
}


@keyframes a_bg_hover_hide {
	0%{ -webkit-transform:scale(1,1); opacity: 1;}
	100%{  -webkit-transform:scale(1,0.5); opacity: 0;}
}

@keyframes a_nav_item_show {
	0%{ -webkit-transform:translate(0px,-30px); opacity: 0;}
	100%{  -webkit-transform:translate(0px,0px); opacity: 1;}
}

@keyframes a_nav_item_hide {
	0%{  -webkit-transform:translate(0px,0px); opacity: 1; }
	100%{ -webkit-transform:translate(0px,-30px); opacity: 0; }
}

.navbar-nav .nav-item:hover .nav-link:after {
    transform: scale(1,1);
    opacity: 1;
}

.navbar-nav .nav-item .nav-link:after {
    display: block;
    content: "";
    height: 4px;
    width: 100%;
    position: absolute;
    bottom: 19px;
    left: 0px;
    background: #00a4e0;
    opacity: 0;
    -webkit-transition: transform 0.2s ease-out,opacity 0.2s ease-out;
    transform-origin: 50% 0%;
    transform: scale(0.01,1);
    margin-bottom: -20px;
}
.navActive{
    display: block;
    content: "";
    height: 4px;
    width: 50%;
    position: absolute;
    bottom: 19px;
    left: 50%;
    background: #00a4e0;
    -webkit-transition: transform 0.2s ease-out,opacity 0.2s ease-out;
    transform-origin: 50% 0%;
    transform: scale(1,1) translateX(-50%);
    opacity: 1;
    margin-bottom: -20px;
}
@media (max-width:992px){
    .navActive{
        display: none;
        opacity: 0;
    }
}

/* 子菜单 */
.sub_menu_list {
    display: none;
    position: absolute;
    /* min-width: 300px; */
    left: 0;
    text-align: center;
    z-index: 2;
    width: 400px;
}
.sub_menu_list li {
    width: 50%;
    display: inline-block;
    float: left;
    padding-right: 10px;
    box-sizing: border-box;
}

.sub_menu_list li a {
    display: block;
    font-size: 16px;
    color: #2b2e2e;
    opacity: 0.7;
    padding: 10px 0;
    text-align: left;
}

.sub_menu_list_right {
    left: auto;
    right: 0;
}
.sub_menu_list_right li{
    padding-right: 0;
}
.sub_menu_list_right li a {
    text-align: right;
}
.sub_menu_list li a:hover {
    color: #00a4e0;
    text-decoration: none;
}

.navbar-light .navbar-toggler {
    border: none;
}
.navbar-toggler-icon.open {
    background-image: url("data:image/svg+xml;base64,PHN2ZyBjbGFzcz0iaWNvbiIgdmlld0JveD0iMCAwIDEwMjQgMTAyNCIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIiB3aWR0aD0iMzIiIGhlaWdodD0iMzIiPjxwYXRoIGQ9Ik01NzkuNjY0IDUxOS41OTJMOTM3LjU3NiAxNjUuNjhhNDIuNjk2IDQyLjY5NiAwIDAgMCAuMTYtNjAuNjggNDMuMjY0IDQzLjI2NCAwIDAgMC02MS4wMzItLjE2OGwtMzU4IDM1My45NTItMzU0Ljg3Mi0zNTMuODE2YTQzLjQgNDMuNCAwIDAgMC02MS4wNTYtLjA4OCA0Mi43NjggNDIuNzY4IDAgMCAwLS4wOCA2MC43MmwzNTQuNzkyIDM1My43MjhMOTkuNzYgODczLjAzMmE0Mi42OCA0Mi42OCAwIDAgMC0uMTY4IDYwLjY4IDQzLjE4NCA0My4xODQgMCAwIDAgMzAuNjA4IDEyLjY1NiA0My4xMDQgNDMuMTA0IDAgMCAwIDMwLjQ0LTEyLjQ5NmwzNTcuODI0LTM1My43NzYgMzU4LjEyOCAzNTcuMDRhNDMuMDcyIDQzLjA3MiAwIDAgMCAzMC41NiAxMi42MjQgNDMuMiA0My4yIDAgMCAwIDMwLjQ4LTEyLjU0NCA0Mi43MTIgNDIuNzEyIDAgMCAwIC4wOC02MC42NjRsLTM1OC4wNDgtMzU2Ljk2eiIvPjwvc3ZnPg==")
}
/* logo */
.wrap_head .logo-b {
    display: block;
}
.wrap_head .logo-g {
    display: none;
}
.submenu_show .logo-b, .head_white .logo-b {
    display: none;
}
.submenu_show .logo-g, .head_white .logo-g {
    display: block;
}

/* 切换菜单栏 */
.menu-nav {
    height: 52px;
    background: #FAF7FA;
    color: #333333;
    font-size: 16px;
    border-bottom: 1px solid #f4f4f4;
}
.menu-nav.fixed {
    position: fixed;
    z-index: 88;
    width: 100%;
}
.menu-nav .container {
    display: flex;
}
.menu-nav .container .menu-nav-item {
    height: 52px;
    line-height: 52px;
    padding: 0 18px;
    cursor: pointer;
    position: relative;
}
.menu-nav .container .menu-nav-item::after {
    content: '';
    position: absolute;
    width: 100%;
    left: 0;
    bottom: 0;
    height: 2px;
    background: #00a4e0;
    opacity: 0;
    -webkit-transition: transform 0.2s ease-out,opacity 0.2s ease-out;
    transform-origin: 50% 0%;
    transform: scale(0.01,1);
}
.menu-nav .container .menu-nav-item.active::after {
    transform: scale(1,1);
    opacity: 1;
}
/* 灰色背景 */
.bg-gray {
    background: #f8f8f8;
}
/* 返回顶部按钮 */
.back-top {
    position: fixed;
    border-radius: 50%;
    width: 70px;
    height: 70px;
    box-shadow: 0px 0px 16px 0px rgba(4,0,0,0.1);
    right: 12.7%;
    bottom: 10%;
    z-index: 999999;
    cursor: pointer;
    display: none;
    padding: 18px;
    background: #ffffff;
}
.back-top img {
    width: 100%;
    height: 100%;
}
.back-top:first-child {
    position: absolute;
    left: 0;
    top: 0;
}
/* 窄屏 */
@media (max-width: 992px){
    .header .container {
        max-width: 100%!important;
    }
    .navbar-collapse {
        position: absolute;
        top: 100%;
        width: 100%;
        left: 0;
    }
    #navbarNav {
        height: auto;
    }
    .navbar-light .navbar-nav .nav-link {
        text-align: center;
    }
    .navbar-light .navbar-nav .nav-item {
        margin-left: 0;
        position: relative;
    }
    .navbar-light .navbar-nav .nav-link {
        height: 60px;
        line-height: 60px;
    }

    /* 手机下子菜单 */
    .sub_menu_list {
        background: #ffffff;
        box-shadow:0px 0px 8px 0px rgba(4,0,0,0.15);
        border-radius: 5px;
        position: absolute;
        top: 100%;
        transition: 0;
        width: 300px;
        left: calc(50% - 150px);
    }

    .last-nav-menu {
        top: auto;
        bottom: 100%;
        transition: 0;
    }
    .sub_menu_list li {
        width: 100%;
        padding-left: 0;
        float: none;
        text-align: center;
    }
    .sub_menu_list li a {
        text-align: center;
    }
    .sub_menu_list:after {
        content: '';
        display:block;
        width:0;
        height:0;
        overflow:hidden;
        font-size: 0;
        line-height: 0;
        border:9px;
        border-style:dashed dashed solid dashed;
        border-color:transparent transparent #fff transparent;
        position:absolute;
        left: 50%;
        top: -18px;
        margin-left: -9px;
    }
    .last-nav-menu:after {
        border-style:solid dashed dashed dashed;
        border-color:#fff transparent transparent transparent;
        top: 100%;
    }
    .sub_menu_list:before {
        content: '';
        display:block;
        position:absolute;
        top:-20px;
        left:50%;
        margin-left: -10px;
        width:0;
        height:0;
        overflow:hidden;
        font-size: 0;
        line-height: 0;
        border:10px;
        border-style:dashed dashed solid dashed;
        border-color:transparent transparent rgba(4,0,0,0.02) transparent;
    }
    .last-nav-menu:before {
        border-style:solid dashed dashed dashed;
        border-color:rgba(4,0,0,0.02) transparent transparent transparent;
        top: 100%;
    }
    .navbar-nav .nav-item:hover .nav-link:after {
        transform: scale(0.01,1);
        opacity: 0;
    }
    .menu-nav .container{
        display: inline-block;
        overflow-x: auto;
        white-space: nowrap
    }
    .menu-nav .container .menu-nav-item {
        display: inline-block;
    }
    /* .menu-nav .container .menu-nav-item {
        padding: 0;
    }
    .menu-nav .container {
        justify-content: space-between;
        flex-wrap: wrap;
    } */
    .submenu_show .bg_hover {
        height: 515px;
    }
    .back-top {
        width: 60px;
        height: 60px;
        right: 6%;
    }
}
footer {
    padding-bottom: 120px;
}
#footer-box {
    padding-bottom: 70px;
}