@counter-style circled-alpha {
    /*system: fixed;*/
    symbols: ❶ ❷ ❸ ❹ ❺ ❻ ❼ ❽ ❾ ❿ ⓫ ⓬ ⓭ ⓮ ⓯ ⓰ ⓱ ⓲ ⓳ ⓴;
    /*suffix: " ";*/
}

body {
    margin-right: 0;
    margin-left: 0;
    overflow-x: hidden;
}

.nav {
    width: 100vw;
    height: 4.69vw;
    background: rgba(37, 56, 35, 0.5);
    /*background: #253820;*/
    display: flex;
    align-items: center;
}

.nav-logo {
    /*opacity: 1.0;*/
    width: 1.03vw;
    height: 3.8vw;
    /*background: url(../imgs/顶部logo.png) no-repeat;*/
    background-size: contain;
    /*background-color: #0D47A1;*/
    margin-left: 2.04vw;
}

.nav-title {
    margin-left: 0.52vw;
    opacity: 1.0;
    width: 8.85vw;
    height: 0.52vw;
    font-size: 0.73vw;
    font-family: Arial, Arial-Regular;
    font-weight: 400;
    text-align: left;
    color: #ffffff;
    line-height: 1.15vw;
}

.nav-items {
    /*width: 2.92vw;*/
    display: flex;
    align-items: center;
    margin-left: 60.06vw;
    max-width: 50vw;
    height: 4.69vw;
    font-size: 0.75vw;
    font-family: Arial, Arial-Regular;
    font-weight: 400;
    text-align: left;
    color: #ffffff;
    line-height: 1.3vw;
    justify-content: center;

}

.nav-item {

    height: 4.69vw;
    line-height: 4.69vw;
    margin-right: 3.18vw;
    text-transform: Uppercase
}

.nav-item:hover {
    color: #ffffff;
    opacity: 0.5;
}

.nav-item:last-child(1) {
    margin-right: 0;
}

.nav-item-select {
    height: 4.69vw;
    line-height: 4.69vw;
    margin-right: 3.18vw;
    text-transform: Uppercase;;
    align-items: center;
    justify-content: center;
}


.nav-item-select .line {
    position: absolute;
    margin-top: -0.99vw;
    margin-left: 0.99vw;
    display: flex;
    float: left;
    width: 1.25vw;
    height: 0.16vw;
    background: #ffffff;
    border-radius: 0.1vw;
}

.nav-item .line {
    position: absolute;
    margin-top: -0.99vw;
    display: flex;
    float: left;
    width: 1.25vw;
    height: 0.16vw;
    background: #ffffff;
    border-radius: 0.1vw;
}

.dropdown-content {
    font-size: 0.53vw;
    display: none;
    position: absolute;
    width: auto;
    background-color: #fff;
    z-index: 9999;
    padding: 0.05vw 1vw;
    box-shadow: 0vw .8vw 1.6vw 0vw rgba(0, 0, 0, 0.2);
    margin-left: -1vw;
}

.nav-item-select:hover .dropdown-content {
    display: block;
}

.nav-item-select:hover:after {
    transform: rotate(0deg);
}

.nav-item-select .nav-item {
    color: black;
    height: 2.69vw;
    line-height: 2.69vw;
    padding-left: 0.5vw;
    padding-right: 0.5vw;
    white-space: nowrap;
    margin-right: 0;
    /*text-align: center;*/
}

.nav-item-select .nav-item:hover {
    background: rgba(0, 0, 0, 0.3);
}

.nav-item-select:after {
    transform: rotate(-90deg);
    display: inline-block;
    margin-left: .255em;
    vertical-align: .255em;
    content: "";
    border-top: .3em solid;
    border-right: .3em solid transparent;
    border-bottom: 0;
    border-left: .3em solid transparent;
}

.a_up {
    /*vertical-align: super;*/
    margin-left: 0.2vw;
    font-size: 0.5vw;
}