main {
    padding: 100px 0 140px;
}

main .one {
    margin-top: 50px;
}

main .one:nth-child(1) {
    margin-top: 0;
}

main .top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 20px;
    border-bottom: 1px solid #000;
    padding-right: 20px;
    cursor: pointer;
}

main .top .f20 {
    
    color: #000000;
    width: 90%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

main .top .iconfont {
    font-size: 18px;
    color: #000;
    font-weight: bold;
}

main .top .icon-guanbi {
    display: none;
}

main .top.active .icon-guanbi {
    display: block;
}

main .top.active .icon-jiahao {
    display: none;
}

main .content {
    padding: 50px 0;
    
    color: #666666;
    line-height: 32px;
    /* display: none; */
}

main .content h2 {
    
    color: #111111;
    line-height: 32px;
}

main .content .tel {
    color: #D80414;
    
}

.pages {
    margin-top: 126px;
}

@media (max-width:1680px) {
    main {
        padding: 100px 0;
    }

    .pages {
        margin-top: 100px;
    }
}

@media (max-width:1440px) {
    main {
        padding: 80px 0;
    }

    .pages {
        margin-top: 80px;
    }
}

@media (max-width:1280px) {
    main {
        padding: 60px 0;
    }

    main .content {
        padding: 40px 0;
    }

    main .one {
        margin-top: 40px;
    }

    .pages {
        margin-top: 60px;
    }
}

@media (max-width:1024px) {
    main {
        padding: 40px 0;
    }

    main .content {
        padding: 30px 0;
    }

    main .one {
        margin-top: 30px;
    }

    .pages {
        margin-top: 40px;
    }
}

@media (max-width:768px) {
    main {
        padding: 30px 0;
    }

    main .content {
        padding: 20px 0;
    }

    .pages {
        margin-top: 30px;
    }
}