/* 公共样式表css */

button {
    outline: 0;
}


button,input,optgroup,select,textarea {
    margin: 0;
    font: inherit;
    color: inherit;
    outline: none;
}

li {
    list-style: none;
}

a {
    color: #666;
}

a:hover {
    color: #eee;
}

.clearfix::after {
    clear: both;
    content: ".";
    display: block;
    height: 0;
    visibility: hidden;
}

.clearfix {
}

/* 必要布局样式css */
.trade-content {
    padding: 30px 0;
}

.trade-title {
    font-size: 24px;
    color: #333;
    text-align: center;
    margin: 50px 0;
    position: relative;
}

.trade-title:before {
    content: "";
    position: absolute;
    width: 0;
    height: 0;
    bottom: -19px;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid;
    border-color: #0a57a0 transparent transparent;
}

.trade-title:after {
    content: "";
    position: absolute;
    width: 52px;
    height: 3px;
    background-color: #0a57a0;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
}

.trade-black {
    
}

.trade-box {
    width: 90% !important;
    margin: 0 auto;
    position: relative;
    transition: all .3s ease;
}

.trade-box-list {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
}
@media screen and (max-width: 1440px) {
.trade-box-item {
    flex: 1;
    text-align: center;
    position: relative;
    height: 400px;
    background: no-repeat center;
    background-size: 100% auto;
}}
@media screen and (min-width: 1440px) and (max-width: 1620px) {
.trade-box-item {
    flex: 1;
    text-align: center;
    position: relative;
    height: 500px;
    background: no-repeat center;
    background-size: 100% auto;
}}
@media screen and (min-width: 1620px) and (max-width: 3920px) {
.trade-box-item {
    flex: 1;
    text-align: center;
    position: relative;
    height: 600px;
    background: no-repeat center;
    background-size: 100% auto;
}}

.trade-content .trade-box-item:before {
    content: "";
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    background-color: rgba(0,0,0,.6);
    transition: all .4s cubic-bezier(.4, 0, .2, 1);
}

.trade-box-item a {
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
}

a, button, input, textarea {
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
    -moz-transition: all .3s ease;
    -webkit-transition: all .3s ease;
    transition: all .3s ease;
}

.item-logo {
    margin: 0 auto;
    display: block;
}

.trade-content .trade-box-item .item-logo {
    position: relative;
    margin-top:50%;
    transition: all .4s cubic-bezier(.4, 0, .2, 1);
}

.item-logo img {
    display: block;
    margin: 0 auto;
    max-width: 100%;
}

.item-title {
    font-size: 20px;
    font-weight: bold;
    color: #fff;
    padding: 20px 0;
    position: relative;
}

.trade-content .item-title:before {
    content: "";
    position: relative;
    display: block;
    width: 20px;
    border-bottom: 2px solid #fff;
    margin: 0 auto 20px;
    transition: all .4s cubic-bezier(.4, 0, .2, 1);
}

.item-text {
    position: relative; line-height:40px; font-size:16px;
    transition: all .4s cubic-bezier(.4, 0, .2, 1);
    opacity: 0;
    margin-top: 10px;
}

.item-text p { padding:0px 40px;
    color: #fff;
    font-size: 16px;
    margin-bottom: 5px;
}

.trade-content .item01 { margin:0px 10px;
    background-image: url(../images/icon-at01.jpg);
}

.trade-content .item02 {margin:0px 10px;
    background-image: url(../images/icon-at02.jpg);
}

.trade-content .item03 {margin:0px 10px;
    background-image: url(../images/icon-at03.jpg);
}

.trade-content .item04 {margin:0px 10px;
    background-image: url(../images/icon-at04.jpg);
}

.trade-content .item05 {
    background-image: url(../images/icon-at05.jpg);
}

.trade-content .trade-box-item:hover .item-text {
    display: block;
    opacity: 1;
    margin-top: 0;
}

.trade-content .trade-box-item:hover:before {
    background-color: rgba(255, 0, 0, .7);
}

.trade-content .trade-box-item:hover .item-logo {
    margin-top: 80px;
}

.trade-content .trade-box-item:hover .item-title:before {
    opacity: 0;
    margin-bottom: 0;
}