.second_headerarea{
    margin-bottom: 0;
}

.second_content{
    padding-top: 80px !important;
}

.second_content .index {
    display: flex;
    width: 100%;
    height: 72px;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 40px;
}

.second_content .index a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    height: 100%;
    background: #E8EFF7;
    border-radius: 4px;
    text-decoration: none;
    padding: 16px;
    display: inline-flex;
    align-items: center;
    /* overflow: hidden; */
    position: relative;
    z-index: 1;
}

.second_content .index a .number {
    font-family: 'Roboto';
    font-style: normal;
    font-weight: 700;
    font-size: 40px;
    line-height: 100%;
    text-align: center;
    letter-spacing: -0.02em;
    color: #285FBB;
    width: 12.6%;
    padding-right: 16px;
    border-right: 1px solid #285FBB;
}

.second_content .index a .title {
    width: 87.4%;
    font-weight: 700;
    font-size: 16px;
    line-height: 150%;
    color: #000000;
    padding-left: 16px;
}

.second_content .index a::after {
    display: inline-block;
    content: '';
    width: 36px;
    min-width: 36px;
    height: 36px;
    border-radius: 50%;
    background: url("../../images/arrow_down_white.svg") no-repeat center/13px, #285FBB;
    border: 1px solid #285FBB;
    box-sizing: border-box;
    z-index: 1;
}

.second_content .index a::before {
    background: #285FBB;
    position: absolute;
    top: 0;
    bottom: 0;
    right: 16px;
    margin: auto;
    content: '';
    width: 36px;
    height: 36px;
    border-radius: 50%;
    transform: scale(0, 0);
    transform-origin: center center;
    transition: transform .2s cubic-bezier(0.45, 0, 0.55, 1);
    z-index: 2;
    border: 1px solid #285FBB;
    background: url("../../images/arrow_down_blue.svg") no-repeat center/13px, #ffffff;
}

.second_content .index a:hover::before {
    transform: scale(1, 1);
}

@media screen and (max-width: 767.5px) {
    .second_content .index{
        flex-direction: column;
        height: 55px;
        gap: 5px;
    }
    .second_content .index a {
        padding: 16px 10px 16px 16px;
    }
    .second_content .index a .number{
        font-size: 26px;
    }
    .second_content .index a .title{
        font-size: 14px;
        padding-left: 10px;
    }
    .second_content .index a::before{
        display: none;
    }
    .second_content .index a::after {
        width: 30px;
        min-width: 30px;
        height: 30px;
    }
}




.second_content {
    counter-reset: article;
    background: url("../../images/gasturbin/bg.svg") center 100px / 100% auto repeat-y;
    padding: 0;
    max-width: none;
}


.second_contentWidth{
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 40px;
}
@media screen and (max-width: 767.5px) {
    .second_contentWidth{
        padding: 0 15px;
    }
}

.second_content article {
    counter-reset: section;
    padding: 60px 0 100px;
}

.second_content article:nth-child(odd) {
    background: url("../../images/gasturbin/bg.svg") center top / 100% auto repeat-y, #F5F9FF;
}

@media screen and (max-width: 767.5px) {
    .second_content article{
        padding: 0;
    }
    .second_content article:last-child{
        padding-bottom: 40px;
    }
}

.second_content article .h1 {
    counter-increment: article;
    font-weight: 700;
    font-size: 40px;
    line-height: 150%;
    color: #000000;
    display: flex;
    align-items: center;
    padding-left: 47px;
    height: 160px;
    background: url("../../images/gasturbin/h_bg.svg") no-repeat left center/contain;
    margin-bottom: 12px;
    margin-left: -47px;
}


.second_content article .h1::before {
    content: "0" counter(article);
    font-family: 'Roboto';
    font-style: normal;
    font-weight: 700;
    font-size: 64px;
    line-height: 100%;
    letter-spacing: -0.03em;
    color: #285FBB;
    margin-right: 8px;
}

.second_content article .h2 {
    counter-increment: section;
    font-weight: 700;
    font-size: 32px;
    line-height: 130%;
    color: #285FBB;
    padding-bottom: 16px;
    border-bottom: 1px solid #285FBB;
    margin-bottom: 16px;
}

.second_content article .h3 {
    counter-increment: section2;
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 20px;
    line-height: 150%;
    color: #000000;

    padding: 16px;
    background: #D9F0FF;
    border-radius: 8px;
    margin-bottom: 32px;

}

.second_content article .h3::before {
    content: counter(section2);
    font-family: 'Roboto';
    font-style: normal;
    font-weight: 700;
    font-size: 26px;
    line-height: 100%;
    text-align: center;
    letter-spacing: -0.04em;
    color: #FFFFFF;
    width: 40px;
    height: 40px;
    background: #285FBB;
    border-radius: 4px;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-right: 16px;
}


.second_content article .h2::before {
    content: counter(article) "-" counter(section) ".";
}


.second_content article .h4::before {
    content: '■';
    color: #285FBB;
    margin-right: 8px;
}

.second_content article .h4 {
    font-weight: 700;
    font-size: 26px;
    line-height: 150%;
    color: #222222;
    margin-bottom: 32px;
    display: flex;
    justify-content: start;
    align-items: center;
}

.second_content article .h4>div {
    white-space: nowrap;
}

.second_content article .h4::after {
    content: '';
    width: 100%;
    height: 1px;
    background: #285FBB;
    margin-left: 10px;
}

@media screen and (max-width: 767.5px) {
    .second_content article .h1{
        font-size: 24px;
        background-size: 140px auto;
        height: 140px;
        line-height: 1.3;
    }
    .second_content article .h1::before {
        font-size: 44px;
    }
    .second_content article .h2{
        font-size: 22px;
    }

    .second_content article .h3{
        font-size: 18px;
        padding: 10px;
        margin-bottom: 20px;
        line-height: 1.3;
    }
    .second_content article .h3::before {
        font-size: 22px;
        width: 34px;
        height: 34px;
    }
    .second_content article .h4{
        font-size: 20px;
        margin: 30px 0 15px;
    }
}



.second_content article>*>.section {
    margin-bottom: 60px;
    counter-reset: section2;
}

.second_content article>*>.section>.section {
    margin-bottom: 36px;
}

.second_content article>*>.section>.section>.section {
    margin-bottom: 52px;
}

.second_content article .section .image-r {
    float: right;
    margin-left: 40px;
    margin-bottom: 40px;
    text-align: center;
    font-size: 14px;
    line-height: 175%;
    text-align: center;
    color: #000000;
    width: 40%;
}

.second_content article .section .image-r img {
    margin-bottom: 16px;
}

.second_content article .section .text {
    font-size: 16px;
    line-height: 175%;
    color: #000000;
    margin-bottom: 36px;
    text-align: left;
}


.second_content article .section .text p {
    margin-bottom: 16px;
}

.second_content article .section .column {
    text-align: center;
    max-width: 840px;
    margin: 0 auto 24px;
}

.second_content article .section .column .title {
    font-weight: 600;
    font-size: 24px;
    color: #222222;
    margin-bottom: 20px;
}

.second_content article .section .column .title>div {
    font-size: 16px;
    line-height: 19px;
    text-align: center;
    color: #222222;
}

.second_content article .section .image {
    margin: 0 auto 24px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.second_content article .section .note {
    text-align: right;
}

.second_content article .section .clear {
    clear: both;
}

.center {
    text-align: center;
}

em {
    font-style: normal;
    font-weight: bold;
    color: #285FBB
}

.next {
    padding: 20px 30px;
    background: #fff;
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    margin: 50px 0 0;
}

.next>.bg {
    /* position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;

    background: linear-gradient(90.62deg, #B6D1FE 0%, #285FBB 100%);
    opacity: .87;
    display: flex;
    justify-content: start;
    align-items: center;
    z-index: 1; */
}


.next>.text {
    position: relative;
    font-weight: 700;
    font-size: 20px;
    line-height: 175%;
    text-align: center;
    /* color: #FFFFFF; */
    z-index: 2;
}

@media screen and (max-width: 767.5px) {

    .second_content{
        padding-top: 40px !important;
    }

    .second_content article>*>.section>.section{
        margin-top: 30px;
    }
    .second_content article .section .image-r{
        float: none;
        width: auto;
        margin: 0 auto 20px;
        max-width: 400px;
    }
    .second_content article .section .image-r img {
        margin-bottom: 5px;
    }
    .second_content article .section .text{
        font-size: 14px;
        margin-bottom: 15px;
    }

    .second_content article .section .column .title {
        font-size: 20px;
        margin-bottom: 10px;
    }
    .second_content article .section .column .title>div{
        font-size: 14px;
    }
    .second_content article>*>.section {
        margin-bottom: 35px;
    }

    .second_content article .section .image {
        margin-bottom: 15px;
    }
    .second_content article .section .note{
        text-align: center;
    }

    .second_content article>*>.section>.section>.section {
        margin-bottom: 30px;
    }

    .next{
        margin-top: 0;
    }
    .next>.text {
        font-size: 16px;
    }


}