@charset "UTF-8";

/* 基本 */

body {
    font-family: 'Noto Sans JP', sans-serif;
}

.container {
    width: 84%;
    margin: 0 auto;
}

@media (min-width: 900px) {
    .container {
        width: 91%;
        max-width: 1240px;
    }
}


/* リセット/ ノーマライズ/ サニタイズ */

body,
h1,
h2,
h3,
h4,
h5,
h6,
p,
ul,
figure {
    margin: 0;
    padding: 0;
}

a {
    color: inherit;
    text-decoration: none;
}

a:hover {
    opacity: 0.8;
}

.sr-only {
    border: 0;
    clip: rect(0 0 0 0);
    height: 1px;
    margin: -1px;
    overflow: hidden;
    padding: 0;
    position: absolute;
    width: 1px;
}


/* ヘッダー */

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 74px;
}

@media (min-width: 900px) {
    .header .container {
        height: 100px;
    }
}


/* ヘッダー：サイト名 */

.site {
    display: flex;
    align-items: center;
}

.site img {
    width: 42px;
    margin-right: 10px;
}

.site .corp {
    color: #333333;
    font-size: 12px;
    font-weight: 900;
    line-height: 1.4;
}

.site .desc {
    color: #707f89;
    font-size: 10px;
    line-height: 1.4;
}

@media(min-width: 900px) {
    .site img {
        width: 59px;
        margin-right: 18px;
    }
    .site .corp {
        font-size: 20px;
    }
    .site .desc {
        font-size: 12px;
    }
}


/* ナビゲーションボタン */

.nav-button {
    box-sizing: content-box;
    padding: 0;
    outline: none;
    border: none;
    background: none;
    width: 20px;
    height: 14px;
    cursor: pointer;
    color: #2E5180;
}

.nav-button::before,
.nav-button::after {
    content: '';
    display: block;
    height: 2px;
    background-color: currentColor;
    transform: translateY(5px);
    transition: 0.3s ease-in-out;
}

.nav-button::before {
    transform: translateY(-5px);
    box-shadow: 0 6px currentColor;
}


/* ナビゲーションボタン（閉じるボタン） */

.open .nav-button {
    z-index: 1000;
    color: #ffffff;
}

.open .nav-button::before {
    transform: translateY(1px) rotate(45deg);
    box-shadow: none;
}

.open .nav-button::after {
    transform: translateY(-1px) rotate(-45deg);
}


/* ナビゲーションメニュー: モバイル */

@media (max-width: 899px) {
    html.open,
    .open body {
        height: 100%;
        overflow: hidden;
    }
    .open .form {
        display: none;
    }
    .open nav {
        left: 0;
    }
    html,
    body {
        overflow-x: hidden;
    }
    .header {
        position: relative;
    }
    .nav {
        position: absolute;
        top: 0;
        left: 100%;
        width: 100%;
        height: 100vh;
        background: rgba(0, 0, 0, 0.8);
        color: #ffffff;
        display: flex;
        justify-content: center;
        align-items: center;
        transition: left 0.5s;
    }
    .nav ul {
        list-style: none;
        font-weight: bold;
        text-align: center;
    }
    .nav li:not(:last-child) {
        margin-bottom: 40px;
    }
    .nav .btn {
        color: inherit;
    }
}


/* ナビゲーションメニュー： PC */

@media (min-width: 900px) {
    .nav-button {
        display: none;
    }
    .nav ul {
        display: flex;
        align-items: center;
        list-style: none;
        color: #333333;
    }
    .nav li:not(:last-child) {
        margin-right: 23px;
    }
    .nav .btn {
        width: 148px;
        border-color: #CDD6DD;
    }
}


/* ヒーロー */

.hero {
    height: 400px;
    background-image: url(img/ai01.jpg);
    background-position: center;
    background-size: cover;
    display: flex;
}

.hero .catch {
    flex: auto;
    align-self: flex-end;
    padding: 30px 0;
    background-color: rgba(255, 255, 255, 0.76);
}

.hero .container {
    align-items: center;
    line-height: 1.3;
}

.hero img {
    max-width: 100%;
    height: auto;
    vertical-align: bottom;
}

@media (min-width: 900px) {
    .hero {
        height: 700px;
    }
    .hero .catch {
        padding: 47px 0 44px;
    }
    .hero p {
        font-size: 16px;
        margin-bottom: 22px;
    }
}


/* メッセージ */

.message {
    padding: 67px 0;
    background-color: #0C57B6;
    color: #ffffff;
}

.message h2 {
    margin-bottom: 38px;
    font-size: 24px;
    line-height: 1.67;
    text-align: center;
}

.message p {
    max-width: 640px;
    margin: auto;
    font-size: 14px;
    line-height: 1.86;
}

@media (min-width: 900px) {
    .message {
        padding: 81px 0;
    }
    .message h2 {
        font-size: 36px;
        line-height: 1.33;
    }
}

@media (max-width: 374px) {
    .message h2 {
        font-size: 20px;
    }
}


/* サービス */

.service {
    padding: 67px 0;
    text-align: center;
}

.service h2 {
    display: inline-block;
    margin-bottom: 16px;
    padding-bottom: 9px;
    border-bottom: dotted 2px currentColor;
    font-size: 24px;
    color: #0C57B6;
}

@media (min-width: 900px) {
    .service {
        padding: 95px 0 87px;
    }
    .service h2 {
        font-size: 36px;
    }
}


/* サービス：サービスの詳細 */

.details {
    margin-top: 53px;
    color: #333333;
}

.detail:not(:last-child) {
    margin-bottom: 67px;
}

.detail h3 {
    margin-bottom: 17px;
    font-size: 20px;
    line-height: 1.75;
}

.detail p {
    max-width: 264px;
    margin: 0 auto 25px;
    font-size: 12px;
    line-height: 2;
}

.detail figure {
    height: 246px;
    margin-bottom: 22px;
    background-position: center;
    background-size: cover;
}

.detail.office figure {
    background-image: url(img/html.jpg);
}

.detail.manage figure {
    background-image: url(img/php.jpg);
}

.detail.research figure {
    background-image: url(img/sql.jpg);
}

@media (min-width: 900px) {
    .details {
        display: flex;
        margin-top: 75px;
    }
    .detail {
        flex: 1;
        margin-right: 3.22%;
    }
    .detail:first-child {
        margin-left: 3.22%;
    }
    .detail:not(:last-child) {
        margin-bottom: 0;
    }
    .detail h3 {
        margin-bottom: 26px;
        font-size: 30px;
        line-height: 1.4;
    }
    .detail p {
        width: 78%;
        max-width: none;
    }
    .detail figure {
        height: 360px;
        margin-bottom: 33px;
    }
    /* ボタンの位置を揃える */
    .detail {
        display: flex;
        flex-direction: column;
    }
    .detail .btn {
        margin-top: auto;
    }
}


/* ボタン */

.btn {
    display: block;
    width: 208px;
    margin: 0 auto;
    padding: 11px 11px 13px;
    box-sizing: border-box;
    border: solid 2px currentColor;
    border-radius: 24px;
    color: #0C57B6;
    font-size: 16px;
    font-weight: bold;
    text-align: center;
}


/* お問い合わせ */

.contact {
    padding: 62px 0;
    background-color: #eef4f8;
    color: #333333;
}

.contact h2 {
    margin-bottom: 42px;
    font-size: 24px;
}

.contact h2+p {
    font-size: 12px;
    line-height: 2.17;
}

@media (min-width: 900px) {
    .contact {
        padding: 0;
        background: none;
    }
    .contact .container {
        display: flex;
        justify-content: space-between;
        padding: 96px 9% 62px;
        box-sizing: border-box;
        background-color: #eef4f8;
    }
    .contact .text {
        flex: 0 0 auto;
    }
    .contact .form {
        flex: 1 1 auto;
        max-width: 457px;
        margin-left: 1em;
        margin-top: 0;
    }
    .contact h2 {
        font-size: 36px;
    }
    .contact h2+p {
        font-size: 14px;
        line-height: 1.86;
    }
}


/* お問い合わせ：フォーム */

.form {
    margin-top: 46px;
}

.form input[type="text"],
.form input[type="email"],
.form textarea {
    width: 100%;
    margin-bottom: 17px;
    padding: 12px 20px 14px;
    border: solid 1px #cdd6dd;
    box-sizing: border-box;
    border-radius: 0;
    -webkit-appearance: none;
    color: #333333;
    font-family: 'Noto Sans JP', sans-serif;
    font-size: 16px;
}

.form ::placeholder {
    color: #cdd6dd;
    opacity: 1;
}

.form textarea {
    height: 150px;
}

.form .btn {
    width: 100%;
    margin: 0;
    border: none;
    background-color: #0C57B6;
    color: #ffffff;
    cursor: pointer;
}

@media (min-width: 900px) {
    .form .btn {
        width: 272px;
    }
}


/* フッター */

.footer {
    padding: 38px 0 56px;
    background-color: #0C57B6;
}

.footer .site img {
    width: 47px;
    margin-right: 14px;
}

.footer .site .corp {
    color: #ffffff;
    font-size: 14px;
}

.footer .add {
    margin: 20px 0 36px 61px;
    color: #ffffff;
    font-size: 12px;
    line-height: 2;
}

.footer .sns {
    display: flex;
    margin-left: 61px;
    list-style: none;
}

.footer .sns li:not(:first-child) {
    margin-left: 25px;
}

.footer .sns img {
    width: 35px;
}

@media (min-width: 900px) {
    .footer {
        margin-top: -48px;
        padding: 105px 0 88px;
        position: relative;
        z-index: -1;
    }
    .footer .container {
        display: flex;
        justify-content: space-between;
    }
    .footer .site img {
        width: 59px;
        margin-right: 18px;
    }
    .footer .add {
        margin: 22px 0 0 77px;
    }
    .footer .sns {
        height: 59px;
        align-items: center;
    }
}


/* フェードイン */

body {
    animation: fade 5s;
}

@keyframes fade {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}