header{
    background-color: #fff;
    display: block;
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    z-index: 500;
}
.header_top {
    height: 8rem ;
    display: flex;
    align-items: center;
    justify-content: center;
}
.header_top  img {
    width: 100%;
}
.header_top a{
    width: 40%;
    padding: 1rem;
}
.header_bottom {
    background-color: #323351;
    padding: .5rem 0;
}
.header_bottom a {
    color:  #fff;
    font-size: 1.6rem;
}
nav {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    position: relative; 
}
nav a {
    position: relative; 
    padding: 10px;
    text-decoration: none; 
}

nav a:not(:last-child)::after {
    content: ''; 
    position: absolute;
    top: 37%;
    right: -9px;
    height: 30%;
    border-right: 1px solid #ccc; 
    margin-left: 10px; 
}
main{
    padding-top: 13rem;
    /* padding-bottom: 10rem; */
}
/* index */
.index_first_banner {
    padding-top: 4rem;
}
.index_first_banner img {
    width: 80%;
}
.index_text_box {
    padding: 4rem 2rem 6rem;
}
.index_text_box h1 {
    font-size: 1.8rem;
    font-weight: 800;
    color: #202141;
    text-align: center;
    margin-bottom: 2rem;
}

.index_text_box span {
    display: block;
    font-size: 1.6rem;
    color: #6F6F6F;
    text-align: center;
    font-weight: 600;
    line-height: 1.4;
}

.index_btn {
    padding: 0 2rem;
    width: 100%;
}
.index_btn a {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.9rem;
    background-color: #F6F9FF;
    font-weight: 700;
    padding: 2.5rem 0;
    border-radius: 1rem;
    background-image: url(../img/banner-icon.png);
    background-position: 88% 100%;
    background-repeat: no-repeat;
    background-size: 5rem;
}
.index_second_banner {
    margin-top: 7rem;
    display: flex;
    align-items: center;
    flex-flow: column nowrap;
    margin-bottom: 7rem;
}
.index_second_banner img {
    width: 65%;
}
.index_text_box em{
    font-weight: 800;
    font-size: 1.9rem;
}
.index_bottom_contents{
    background-color: #F4F4F4;
    padding: 1rem 0 4rem;
}
.bottom_text{
    display: flex;
    flex-flow: column nowrap;
    align-items: center;
    justify-content: center;
    padding: 3rem 0;
}
.bottom_text span {
    display: block;
    font-size: 1.6rem;
    color: #6F6F6F;
    text-align: center;
    margin-bottom: .5rem;
}
.bottom_text p {
    font-weight: 600;
    font-size: 2rem;
}
.index_category {
    display: flex;
    flex-flow: row wrap;
    justify-content: space-between;
    padding: 0rem 2rem;
}
.index_category a {
    width: 48.5%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-flow: column nowrap;
    box-shadow: 0.2rem .2em 0.3rem #a3a3a8;
    border-top-left-radius: 1rem;
    border-bottom-right-radius: 1rem;
    background-color: #fff;
    margin-bottom: 1rem;
    border: 1px solid #EBEBEB;
    height: 14rem;
    gap: 1.5rem;
}
.index_category span {
    font-size: 1.6rem ;
    font-weight: 600;
}
.index_category img {
    height: 4.5rem;
}
/* sub1 */
.sub_wrap {
    /* padding: 0 2rem */
}
.sub_wrap .sub1_titles {
    padding: 3rem 2rem ;
    font-size: 1.8rem;
    font-weight: 800;
    color: #202141;
}

.sub_wrap pre {
    font-size: 1.6rem;
    color: #6F6F6F;
    line-height: 1.4;
    background-color: #fff;
}
.sub1_a_group {
    background-color: #F4F4F4;
    padding:  2rem 0;
    margin-top: 4rem;
    margin-bottom: 4rem;
}
.point3{
    font-size: 1.8rem;
    font-weight: 600;
    color: #313250;
}
.sub1_a{
    padding: 0 2rem;
    
}
.sub1_a_group pre{
    padding: 1.5rem;
    margin-bottom: 2rem;
    border-top-left-radius: 1rem;
    border-bottom-right-radius: 1rem;
    box-shadow: 0.4rem .4rem 0.6rem #bebec0;
}
.sub_titles{
    font-size: 1.8rem;
    font-weight: 600;
    color: #313250;
    margin-bottom: 1.2rem;
}
.sub2_bottom {
    background-color:#F4F4F4;
    padding: 0 2rem 4rem;
}
.titles_box {
    padding: 2.2rem;
    background-color: #fff;
    margin-bottom: 2rem;
    border-top-left-radius: 1rem;
    border-bottom-right-radius: 1rem;
    box-shadow: 0.4rem .4rem 0.6rem #bebec0;
}
.sub2_a_text {
    padding: 0 2rem;
}

.impacet_2 ,.impacet_16 {
    padding: 4rem 0  2rem;
    font-size: 1.8rem;
    font-weight: 800;
    color: #202141;
}
.sub2_a_text{
    padding-bottom: 4rem;
}
.impacet_22 ,.impacet_23 {
    padding: 3rem 2rem;
    font-size: 1.8rem;
    font-weight: 800;
    color: #202141;
}
.sub2_b_text {
    padding: 0 2rem 4rem;
}
.btn_wrap{
    padding: 0 2rem;
}
.sub_btn{
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.9rem;
    background-color: #323351;
    font-weight: 600;
    padding: 2.5rem 0;
    border-radius: 1rem;
    background-image: url(../img/banner-icon.png);
    background-position: 85% 100%;
    background-repeat: no-repeat;
    background-size: 5rem;
    color: #fff;
    margin-top: 5rem;
    margin-bottom: 5rem;
}
/* cate */
.main_titles{
    padding: 3rem 2rem;
    font-size: 1.8rem;
    font-weight: 800;
    color: #202141;
}
.cate_wrap{

}
.sub3_bottom {
    background-color: #F4F4F4;
    padding: 4rem 2rem 4rem;
} 

.additional_text {
    padding: 2rem;
}
.sub_wrap3{
    /* padding: 2rem 0 0; */
}
.sub2_b_text3{
    padding: 0 2rem 2rem;
}
.extra_button{
    padding: 0 2rem;
    margin-bottom: 1rem;
    margin-top: 4rem;
}
.sub1_btn_2{
    margin-top: 0;
    margin-bottom: 2rem;
}
.btn_wrap2{
    margin-bottom: 4rem;
}
/* footer */
footer{
    height: 8rem;
    text-align: center;
    display: flex;
    align-items: center;
    flex-flow: column nowrap;
    gap: .5rem;
    padding: 1rem 0;
    border-top: 2px solid #F4F4F4;
}
footer p {
    color: #6F6F6F;
    font-size: 1.6rem;
    font-weight: 600;
}