*{
    font-family:"Yu Gothic Medium", "游ゴシック Medium", YuGothic, "游ゴシック体", sans-serif;
    margin: 0;
    letter-spacing: 0.05em;
}
html {
    scroll-behavior: smooth;
}
a {
    text-decoration: none;
}
ul {
    padding-left: 0;
}
li {
    list-style: none;
}
.PC {
    display: block;
}
.SP {
    display: none;
}

.wrap {
    overflow: hidden;
}
/*firstview*/
.firstview {
    width: 100%;
    height: 100vh;
    min-height: 700px;
    background: url("images/firstview-background.jpg");
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    background-attachment: fixed;
}
.firstview-background-filter {
    width: 100%;
    height: 100%;
    background: rgba(1, 31, 53, 0.3);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}
/*header*/
header {
    width: 100%;
    padding: 30px 0px;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 999;
}
.header-background {
    background: rgba(4, 73, 125, 0.5);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    transition: 1s;
}
.header-logo {
    width: 60px;
    float: left;
    padding-left: 50px;
}
.header-logo img {
    width: 100%;
}
.header-menu {
    width: 80%;
    text-align: center;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.header-menu a {
    display: inline-block;
    color: white;
    font-size: 18px;
    font-family: din-2014, sans-serif;
    font-weight: 600;
    font-style: normal;
    border-bottom: 2px solid white;
    padding: 5px 0px;
    margin: 0 20px;
    transition: 0.5s;
}
.header-menu a:hover {
    opacity: 0.3;
}
.header-sns {
    float: right;
    position: absolute;
    right: 50px;
    top: 50%;
    transform: translateY(-50%);
}
.header-sns a {
    transition: 0.5s;
}
.header-sns a:hover {
    opacity: 0.3;
}
.header-sns a i {
    color: white;
    padding-left: 30px;
}
.firstview-catchcopy {
    width: 400px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}
.firstview-catchcopy img {
    width: 100%;
}

/*hamburger menu*/
.hamburger-menu{
    display: none;
}
.hamburger-header-wrap {
    width: 100%;
    height: 90px;
    position: fixed;
    top: 0;
    left: 0;
    z-index: 99;
}
.nav-position{
    position: fixed;
    top: 0;
    right: 0;
    z-index: 999;
    padding: 33px;
}
.nav-toggle{
    display: block;
    position: relative;
    width: 1.75rem;
    height: 1.5rem;
}
.nav-toggle i{
    display: block;
    width: 100%;
    height: 2px;
    background-color: white;
    position: absolute;
    transition: transform .5s, opacity .5s;
}
.nav-toggle i:nth-child(1){
    top: 0;
}
.nav-toggle i:nth-child(2){
    top: 0;
    bottom: 0;
    margin: auto;
}
.nav-toggle i:nth-child(3){
    bottom: 0;
}
.nav{
    width: 80vw;
    height: 100%;
    background: -moz-linear-gradient(top left, #2FB7FF, #2470C9); 
    background: -webkit-linear-gradient(top left, #2FB7FF, #2470C9); 
    background: linear-gradient(to bottom right, #2FB7FF, #2470C9);
    z-index: 990;
    position: fixed;
    top: 0;
    right: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity .5s, visibility .5s;
}
.nav ul{
    padding: 80px 0 0 40px;
}
.nav ul li a{
    width: 80%;
    height: 25px;
    color: white;
    font-size: 18px;
    font-family: din-2014, sans-serif;
    font-weight: 600;
    font-style: normal;
    padding: 20px 0px 10px 0px;
    margin-top: 20px;
    display: inline-block;
    border-bottom: 1px solid white;
}
.nav ul li a span{
    font-size: 14px;
    font-family:"Yu Gothic Medium", "游ゴシック Medium", YuGothic, "游ゴシック体", sans-serif;
    font-weight: lighter;
    padding-left: 10px;
}
.hamburger-sns {
    padding: 50px 0 0 40px;
    margin: 0 auto;
}
.hamburger-sns a {
    color: white;
    margin-right: 40px;
}

/*hamburger menu_click*/
.nav.show {
    opacity: 1;
    visibility: visible;
}
.nav-toggle.show i:nth-child(1) {
    transform: translateY(10px) rotate(-45deg);
}
.nav-toggle.show i:nth-child(2) {
    opacity: 0;
}
.nav-toggle.show i:nth-child(3) {
    transform: translateY(-12px) rotate(45deg);
}

/*scroll down*/
.firstview-scroll a {
    color: white;
    font-size: 12px;
    padding-top: 60px;
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
}
.firstview-scroll a span {
    position: absolute;
    top: 0;
    left: 50%;
    width: 40px;
    height: 40px;
    margin-left: -20px;
    border: 1px solid #fff;
    border-radius: 100%;
    box-sizing: border-box;
    transition: 0.5s;
}
.firstview-scroll a span:hover {
    opacity: 0.5;
}
.firstview-scroll a span::after {
    position: absolute;
    top: 50%;
    left: 50%;
    content: '';
    width: 10px;
    height: 10px;
    margin: -7px 0 0 -5px;
    border-left: 1px solid #fff;
    border-bottom: 1px solid #fff;
    -webkit-transform: rotate(-45deg);
    transform: rotate(-45deg);
    box-sizing: border-box;
}
.firstview-scroll a span::before {
    position: absolute;
    top: 0;
    left: 0;
    z-index: -1;
    content: '';
    width: 38px;
    height: 38px;
    box-shadow: 0 0 0 0 rgba(255,255,255,.1);
    border-radius: 100%;
    opacity: 0;
    -webkit-animation: sdb 3s infinite;
    animation: sdb 3s infinite;
    box-sizing: border-box;
}
@-webkit-keyframes sdb {
    0% {
      opacity: 0;
    }
    30% {
      opacity: 1;
    }
    60% {
      box-shadow: 0 0 0 60px rgba(255,255,255,.1);
      opacity: 0;
    }
    100% {
      opacity: 0;
    }
}
@keyframes sdb {
    0% {
      opacity: 0;
    }
    30% {
      opacity: 1;
    }
    60% {
      box-shadow: 0 0 0 60px rgba(255,255,255,.1);
      opacity: 0;
    }
    100% {
      opacity: 0;
    }
}



/* news */
.news {
    width: 90%;
    max-width: 1100px;
    margin: 100px auto 30px;
    display: flex;
    justify-content: space-between;
}
.news__index {
    width: 170px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.news__index__ttl h2 {
    color: #25A7E1;
    font-size: 50px;
    font-family: din-2014, sans-serif;
    font-weight: 600;
    font-style: normal;
    letter-spacing: 0.1em;
}
.news__index__ttl span {
    color: #25A7E1;
    font-size: 16px;
    letter-spacing: 0.05em;
}
.news__index__btn.pc {
    display: block;
}
.news__index__btn.sp {
    display: none;
}
.news__index__btn {
    width: 180px;
    color: #25A7E1;
    font-size: 14px;
    font-family: din-2014, sans-serif;
    font-weight: 600;
    font-style: normal;
    letter-spacing: 0.1em;
    border-radius: 50px;
    padding: 13px 30px;
    border: 1px solid #25A7E1;
    box-sizing: border-box;
    position: relative;
    transition: all .3s ease;
}
.news__index__btn:hover {
    color: #FFF;
    background: #25A7E1;
    border: 1px solid transparent;
}
.news__index__btn span {
    display: inline-block;
    width: 8px;
    height: 8px;
    position: absolute;
    top: 50%;
    right: 18px;
    transform: translateY(-50%);
}
.news__index__btn span.default {
    z-index: 2;
    transition: opacity .3s ease;
}
.news__index__btn:hover span.default {
    opacity: 0;
}
.news__index__btn span.hover {
    z-index: 1;
}
.news__index__btn span::before,
.news__index__btn span::after {
    content: "";
    position: absolute;
    top: calc(50% - 0.5px);
    right: 0;
    width: 8.5px;
    height: 1px;
    border-radius: 9999px;
    transform-origin: calc(100% - 0.5px) 50%;
    transition: all .3s ease;
}
.news__index__btn span.default::before,
.news__index__btn span.default::after {
    background-color: #25a7e1;
}
.news__index__btn span.hover::before,
.news__index__btn span.hover::after {
    background-color: #FFF;
}
.news__index__btn span::before {
    transform: rotate(26.55deg);
}  
.news__index__btn span::after {
    transform: rotate(-26.55deg);
}
.news__cnt {
    width: calc(100% - 260px);
}
.news__cnt__list {
    width: 100%;
    border-bottom: 1px solid #C6C6C6;
    padding: 30px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-sizing: border-box;
}
.news__cnt__list__date {
    font-size: 18px;
    font-family: din-2014, sans-serif;
    font-weight: 600;
    font-style: normal;
    letter-spacing: 0.05em;
}
.news__cnt__list__category {
    width: 80px;
    color: #FFF;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-align: center;
    background: linear-gradient(to right bottom, #25A7E1, #2679D0);
    padding: 4px 10px;
    box-sizing: border-box;
}
.news__cnt__list p {
    width: calc(100% - 250px);
    font-size: 16px;
    letter-spacing: 0.05em;
}



/* about */
.about {
    width: 100%;
    padding: 100px 0;
}
.about-content1 {
    width: 100%;
    position: relative;
}
.about-img1 {
    width: 75%;
    height: 450px;
    background: url("images/about-img1.jpg");
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    -webkit-clip-path: polygon(15% 0%, 100% 0%, 100% 100%, 0% 100%);
    clip-path: polygon(15% 0%, 100% 0%, 100% 100%, 0% 100%);
    position: absolute;
    top: -60px;
    right: 0;
}
.about-message1 {
    width: 70%;
    padding: 60px 10% 60px 5%;
    box-sizing: border-box;
    line-height: 2;
    background-color: white;
    -webkit-clip-path: polygon(0% 0%, 100% 0%, 85% 100%, 0% 100%);
    clip-path: polygon(0% 0%, 100% 0%, 85% 100%, 0% 100%);
    margin: 60px 0 0 0;
}
.about-message1 h2 {
    font-size: 22px;
    padding-bottom: 30px;
}
.about-message1 h2 span {
    color: #26A7E1;
}
.about-message1 p {
    font-size: 16px;
}
.about-content2 {
    width: 100%;
    height: 600px;
    position: relative;
}
.about-img2 {
    width: 75%;
    height: 450px;
    background: url("images/about-img2.jpg");
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
    -webkit-clip-path: polygon(0% 0%, 100% 0%, 85% 100%, 0% 100%);
    clip-path: polygon(0% 0%, 100% 0%, 85% 100%, 0% 100%);
    position: absolute;
    top: 100px;
    left: 0;
}
.about-message2 {
    width: 70%;
    float: right;
    padding: 60px 0 60px 13%;
    box-sizing: border-box;
    line-height: 2;
    background-color: white;
    -webkit-clip-path: polygon(15% 0%, 100% 0%, 100% 100%, 0% 100%);
    clip-path: polygon(15% 0%, 100% 0%, 100% 100%, 0% 100%);
    margin: 230px 50px 0 0;
}
.about-message2 h2 {
    font-size: 22px;
    padding-bottom: 30px;
}
.about-message2 h2 span {
    color: #26A7E1;
}
.about-message2 p {
    font-size: 16px;
}
/*service*/
.service {
    width: 100%;
    padding: 50px 0 100px 0;
    background: #FAFAFA;
}
.service h2 {
    color: #26A7E1;
    font-size: 50px;
    letter-spacing: 0.1em;
    font-family: din-2014, sans-serif;
    font-weight: 600;
    font-style: normal;
    text-align: center;
}
.sub-title {
    color: #26A7E1;
    font-size: 16px;
    text-align: center;
}
.service-contents {
    width: 90%;
    max-width: 1200px;
    padding-top: 50px;
    margin: 0 auto;
    display: flex;
}
.service-content {
    width: 25%;
    position: relative;
    display: flex;
    flex-direction: column;
}
/* .service-content:nth-child(1), .service-content:nth-child(2) {
    margin-top: 0;
} */
.service-content h3 {
    width: 100%;
    text-align: center;
    padding-bottom: 10px;
    margin-left: 20px;
}
.service-img01, .service-img02, .service-img03, .service-img04 {
    width: 100%;
    height: 260px;
    -webkit-clip-path: polygon(15% 0%, 100% 0%, 85% 100%, 0% 100%);
    clip-path: polygon(15% 0%, 100% 0%, 85% 100%, 0% 100%);
}
.service-img01 {
    background: url("images/service-img01.jpg");
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
}
.service-img02 {
    background: url("images/service-img02.jpg");
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
}
.service-img03 {
    background: url("images/service-img03.jpg");
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
}
.service-img04 {
    background: url("images/service-img04.jpg");
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
}
.service-content p {
    width: 85%;
    font-size: 16px;
    text-align: center;
    padding: 30px 0 20px;
}
.service-content-btn {
    width: 85%;
    text-align: center;
}
.service-content a {
    display: inline-block;
    color: #26A7E1;
    font-size: 14px;
    border: 1px solid #26A7E1;
    border-radius: 99px;
    padding: 13px 15px 15px 55px;
    transition: 0.5s;
}
.service-content a:hover {
    color: white;
    background: #26A7E1;
}
.service-content a span {
    padding-left: 30px;
}

/*works*/
.works {
    width: 100%;
    padding: 50px 0 100px 0;
}
.works h2 {
    color: #26A7E1;
    font-size: 50px;
    letter-spacing: 0.1em;
    font-family: din-2014, sans-serif;
    font-weight: 600;
    font-style: normal;
    text-align: center;
}
.works-contents {
    width: 90%;
    max-width: 1100px;
    margin: 0 auto;
}
.works-heading {
    font-size: 24px;
    font-weight: bold;
    text-align: center;
    margin-top: 30px;
}
.big {
    font-size: 40px;
    padding: 0 5px;
}
.small {
    font-size: 16px;
}
.works-content {
    width: 100%;
    box-shadow: 0 0 6px rgba(0, 0, 0, 0.16);
    margin-top: 50px;
    display: flex;
}
iframe {
    width: 40%;
}
.works-exp {
    width: 60%;
    padding: 40px 20px 20px 50px;
}
.works-exp h2 {
    font-size: 18px;
    font-weight: bold;
    padding-bottom: 20px;
}
.works-kinds {
    display: inline-block;
    color: #7E7E7E;
    font-size: 14px;
    border: 1px solid #7E7E7E;
    padding: 10px 25px;
}
.works-exp a {
    color: #26A7E1;
    font-size: 14px;
    border: 1px solid #26A7E1;
    border-radius: 99px;
    padding: 10px 15px 10px 45px;
    float: right;
    transition: 0.5s;
}
.works-exp a:hover {
    color: white;
    background: #26A7E1;
}
.works-exp a span {
    padding-left: 25px;
}
.works-btn-wrap {
    width: 292px;
    margin: 0 auto;
}
.works-btn {
    display: inline-block;
    color: #26A7E1;
    font-size: 18px;
    border: 1px solid #26A7E1;
    border-radius: 99px;
    padding: 13px 15px 15px 110px;
    margin-top: 50px;
    transition: 0.5s;
}
.works-btn:hover {
    color: white;
    background: #26A7E1;
}
.works-btn span {
    padding-left: 80px;
}
/*footer*/
.footer {
    width: 100%;
    height: 400px;
    background: #003A64;
    position: relative;
}
.footer-content {
    width: 600px;
    padding-top: 100px;
    margin: 0 auto;
}
.footer-logo {
    width: 100px;
    float: left;
    padding-top: 25px;
}
.footer-logo img {
    width: 100%;
}
.footer-menu {
    float: right;
}
.footer-menu ul {
    float: left;
}
.footer-menu ul li {
    margin-bottom: 35px;
}
.ul-left {
    margin-right: 60px;
}
.footer-menu ul li a {
    color: white;
    font-family: din-2014, sans-serif;
    font-weight: lighter;
}
.footer-copyright {
    color: white;
    font-size: 10px;
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
}


@media screen and (max-width: 1200px) {
    .service-contents {
        flex-wrap: wrap;
    }
    .service-content {
        width: 50%;
        margin-top: 0;
        padding-bottom: 50px;
    }
}

@media screen and (max-width: 1000px) {
    html {
        height: -webkit-fill-available;
    }
    .PC {
        display: none;
    }
    .SP {
        display: block;
    }

    /*firstview*/
    .firstview {
        width: 100%;
        height: 100vh;
        min-height: 700px;
        background: url("./images/firstview-background.jpg");
        background-position: center center;
        background-repeat: no-repeat;
        background-size: cover;
        background-attachment: none;
    }
    .firstview-background-filter {
        width: 100%;
        height: 100%;
        background: rgba(1, 31, 53, 0.3);
        -webkit-backdrop-filter: blur(10px);
        backdrop-filter: blur(10px);
    }

    /*header*/
    header {
        display: none;
    }
    .hamburger-header-logo {
        width: 50px;
        position: fixed;
        top: 0;
        left: 0;
        z-index: 99;
        padding: 20px;
    }
    .hamburger-header-logo img {
        width: 100%;
    }
    .firstview-catchcopy {
        width: 250px;
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
    }

    /* hamburger menu */
    .hamburger-menu{
        display: block;
    }

    /* news */
    .news {
        margin: 70px auto 30px;
        display: block;
    }
    .news__index {
        width: 100%;
        display: block;
    }
    .news__index__ttl h2 {
        font-size: 40px;
    }
    .news__index__ttl span {
        font-size: 14px;
    }
    .news__index__btn.pc {
        display: none;
    }
    .news__index__btn.sp {
        display: block;
    }
    .news__index__btn {
        margin: 30px auto 0;
    }
    .news__index__btn:hover {
        color: #25A7E1;
        background: transparent;
        border: 1px solid #25A7E1;
    }
    .news__index__btn:hover span.default {
        opacity: 1;
    }
    .news__cnt {
        width: 100%;
        margin-top: 15px;
    }
    .news__cnt__list {
        padding: 25px 0;
        justify-content: flex-start;
        align-items: baseline;
        flex-wrap: wrap;
    }
    .news__cnt__list__date {
        font-size: 16px;
    }
    .news__cnt__list__category {
        margin-left: 10px;
    }
    .news__cnt__list p {
        width: 100%;
        font-size: 14px;
        margin-top: 15px;
    }

    /*about*/
    .about {
        padding: 70px 0 0 0;
    }
    .about-content1 {
        width: 100%;
        position: relative;
    }
    .about-img1 {
        width: 90%;
        height: 300px;
        top: -150px;
    }
    .about-message1 {
        width: 95%;
        padding: 40px 15% 50px 30px;
        margin: 120px 0 0 0;
    }
    .about-message1 h2 {
        font-size: 16px;
        padding-bottom: 20px;
    }
    .about-message1 p {
        font-size: 14px;
    }
    .about-content2 {
        width: 100%;
        height: 530px;
        position: relative;
    }
    .about-img2 {
        width: 80%;
        height: 450px;
        position: absolute;
        top: 0px;
        left: 0;
    }
    .about-message2 {
        width: 95%;
        padding: 40px 20px 50px 20%;
        margin: 25vw 0 0 0;
    }
    .about-message2 h2 {
        font-size: 16px;
        padding-bottom: 20px;
    }
    .about-message2 p {
        font-size: 14px;
    }
    /*service*/
    .service {
        padding: 50px 0 30px 0;
    }
    .service h2 {
        font-size: 40px;
    }
    .sub-title {
        font-size: 14px;
    }
    .service-contents {
        width: 90%;
        padding-top: 30px;
    }
    .service-content h3 {
        width: 100%;
        font-size: 16px;
        text-align: center;
        padding-bottom: 10px;
        margin: 0;
    }
    .service-img1, .service-img2, .service-img3 {
        width: 100%;
        height: 200px;
        -webkit-clip-path: polygon(5% 0%, 100% 0%, 95% 100%, 0% 100%);
        clip-path: polygon(5% 0%, 100% 0%, 95% 100%, 0% 100%);
    }
    .service-content p {
        height: auto;
        font-size: 14px;
        padding: 20px 0;
    }
    .service-content-btn {
        width: 226px;
        margin: 0 auto;
    }
    .service-content a {
        color: #26A7E1;
        font-size: 14px;
        border: 1px solid #26A7E1;
        border-radius: 99px;
        padding: 13px 15px 15px 75px;
        margin-left: 0;
    }
    .service-content a span {
        padding-left: 50px;
    }

    /*works*/
    .works {
        width: 100%;
        padding: 50px 0;
    }
    .works h2 {
        font-size: 40px;
    }
    .works-heading {
        font-size: 18px;
        margin-top: 30px;
    }
    .big {
        font-size: 30px;
    }
    .small {
        font-size: 14px;
    }
    .works-content {
        margin-top: 20px;
        display: block;
    }
    iframe {
        width: 100%;
        height: 200px;
    }
    .works-exp {
        width: 90%;
        padding: 20px 0 70px 0;
        margin: 0 auto;
    }
    .works-exp h2 {
        font-size: 16px;
        padding-bottom: 10px;
    }
    .works-kinds {
        padding: 5px 25px;
        font-size: 12px;
    }
    .works-exp-btn-wrap {
        width: 226px;
        padding-top: 30px;
        margin: 0 auto;
    }
    .works-exp a {
        padding: 10px 15px 12px 75px;
        margin-top: 0;
        display: block;
    }
    .works-exp a span {
        padding-left: 50px;
    }
    .works-btn-wrap {
        width: 278px;
    }
    .works-btn {
        font-size: 16px;
        padding: 15px 10px 15px 110px;
        margin-top: 50px;
    }
    .works-btn span {
        padding-left: 80px;
    }
    /*footer*/
    .footer {
        height: 55px;
    }
    .footer-content {
        display: none;
    }
    .footer-copyright {
        width: 90%;
        color: white;
        text-align: center;
        font-size: 12px;
        margin: 0 auto;
    }
}
@media screen and (max-width: 600px) {
    .service-content {
        width: 100%;
    }
    .service-content p {
        width: 100%;
    }
}