.a_layout .a_item h2 {
    color: #000;
    font-size: 50px;
    font-weight: 500;
    letter-spacing: 0;
    line-height: 1;
    margin: 0;
}
@media screen and (max-width: 1000px) {
    .a_layout .a_item h2 {
        color: #000;
        font-size: 30px;
    }
    .a_layout .a_item .title {
        margin: 0 0 10px;
    }
}