@media(max-width:640px) {
    .head-section {
        padding: 50px 20px;
    }

    .tittle-text h1 {
        font-size: 30px;
    }

    .tittle-text p {
        font-size: 15px;
        padding: 10px 40px;
    }

    .steel-building-section-category {
        margin-top: 35px;
        padding: 2px 34px;
        line-height: 21px;
    }

    .steel-building-section-category .blog-section a {
        font-size: 18px;
    }

    .steel-building-section-category .blog-section p {
        font-size: 16px;
    }

    .blog-detail-section {
        padding: 25px;
    }

    .tittle-text h1 {
        font-size: 21px;
    }

    .blog-detail-section .tittle-text p {
        font-size: 13px;
        padding-top: 20px;
    }

    .blog-detail-section .tittle-text p span {
        padding-left: 0;
    }

    .blog-detail-section .tittle-text p i {
        padding: 4px;
    }

    .content-text {
        margin-top: 19px;
    }

    .content-text .second-div {
        margin-top: 19px;
    }

    .content-text .second-div p {
        font-size: 14px;
    }

    .content-text .third-div h5 {
        font-size: 20px;
    }

    .content-text .third-div p {
        font-size: 14px;
    }

    .content-text .four-div h5 {
        font-size: 20px;
    }

    .content-text .four-div ul li {
        font-size: 14px;
    }

    .content-text .five-div h5 {
        font-size: 20px;
    }

    .content-text .five-div ul li {
        font-size: 14px;
    }

    .content-text .six-div h5 {
        font-size: 20px;
    }

    .content-text .six-div p {
        font-size: 14px;
    }

    .content-text .content-text-space {
        padding: 10px 20px;
    }

    .head-section {
        padding: 17px;
    }

    .tittle-text h1 {
        font-size: 39px;
    }

    .tittle-text p {
        font-size: 20px;
    }

    .steel-building-section {
        padding: 44px 10px 17px;
    }

    .steel-building-section h5 {
        font-size: 26px;
    }

    .steel-building-section p {
        font-size: 15px;
    }

    .steel-building-section .blog-section {
        font-size: 14px;
        padding: 0;
    }

    .steel-building-section .blog-section p {
        font-size: 14px;
    }

    .steel-building-section a .button3 {
        padding: 6px 8px;
    }

    .steel-building-section a .button {
        font-size: 12px;
    }
}

@media(max-width:992px) {
    .steel-building-section .blog-section .row .col-lg-3.col-sm-6.col-xs-12 {
        border-right: none;
    }
}