.billboard {
    /*background-image: url("../images/collaborate/billboard.jpg");*/
}

.billboard [class^=heading] {
    position: relative;
}

.billboard [class^=heading] ._icon {
    width: 125px;
    display: block;
    position: absolute;
    top: calc(50% - 62.5px);
    left: calc(50% - 62.5px);
}

@media screen and (max-width: 639px) {
    .billboard [class^=heading] ._icon {
        width: 78px;
        top: calc(50% - 39px);
        left: calc(50% - 39px);
    }
}
.billboard [class^=heading] ._icon path {
    fill: #bbb;
}

.list-collaborate {
    margin-top: 60px;
}

.list-collaborate > ._item.-reverse a ._title {
    -webkit-box-ordinal-group: 3;
    -webkit-order: 2;
    -ms-flex-order: 2;
    order: 2;
}

.list-collaborate > ._item.-reverse a ._title:after {
    top: calc(50% - 15px);
    left: -40px;
    border-right: 20px solid #49bed0;
    border-left: 20px solid transparent;
    border-bottom: 15px solid transparent;
    border-top: 15px solid transparent;
}

@media screen and (max-width: 639px) {
    .list-collaborate > ._item.-reverse a ._title:after {
        top: auto;
        bottom: -40px;
        right: auto;
        left: calc(50% - 15px);
        border-top: 20px solid #49bed0;
        border-right: 15px solid transparent;
        border-bottom: 20px solid transparent;
        border-left: 15px solid transparent;
    }
}
.list-collaborate > ._item.-reverse ._img {
    -webkit-box-ordinal-group: 2;
    -webkit-order: 1;
    -ms-flex-order: 1;
    order: 1;
}

.list-collaborate > ._item a {
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    -webkit-transition: 0.3s;
    transition: 0.3s;
}

@media screen and (max-width: 639px) {
    .list-collaborate > ._item a {
        display: block;
    }
}
.list-collaborate > ._item a:hover {
    opacity: 0.75;
}

.list-collaborate > ._item a ._title {
    width: 240px;
    background-color: #49bed0;
    text-align: center;
    display: -webkit-box;
    display: -webkit-flex;
    display: -ms-flexbox;
    display: flex;
    -webkit-box-align: center;
    -webkit-align-items: center;
    -ms-flex-align: center;
    align-items: center;
    -webkit-box-pack: center;
    -webkit-justify-content: center;
    -ms-flex-pack: center;
    justify-content: center;
    position: relative;
}

@media screen and (max-width: 639px) {
    .list-collaborate > ._item a ._title {
        width: 100%;
        padding: 10px 20px;
        -webkit-box-sizing: border-box;
        box-sizing: border-box;
    }
}
.list-collaborate > ._item a ._title:after {
    content: "";
    position: absolute;
    display: block;
    width: 0;
    height: 0;
    top: calc(50% - 15px);
    right: -40px;
    border-left: 20px solid #49bed0;
    border-right: 20px solid transparent;
    border-bottom: 15px solid transparent;
    border-top: 15px solid transparent;
}

@media screen and (max-width: 639px) {
    .list-collaborate > ._item a ._title:after {
        top: auto;
        bottom: -40px;
        right: auto;
        left: calc(50% - 15px);
        border-top: 20px solid #49bed0;
        border-right: 15px solid transparent;
        border-bottom: 20px solid transparent;
        border-left: 15px solid transparent;
    }
}
.list-collaborate > ._item a ._title ._heading {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
}

@media screen and (max-width: 767px) {
    .list-collaborate > ._item a ._title ._heading {
        font-size: 16px;
    }
}
.list-collaborate > ._item a ._img {
    width: 760px;
}

@media screen and (max-width: 639px) {
    .list-collaborate > ._item a ._img {
        width: 100%;
    }
}