@charset "utf-8";

/* -----------------------------------------------------------

全体

----------------------------------------------------------- */
html {
    scroll-behavior: smooth;
}

.content {
    width: 94%;
    overflow: hidden;
}

.content_inner {
    width: 90%;
    max-width: 1000px;
    margin: 0 auto;
    padding: 120px 0 200px;
}

#sub_page .content_inner {
    padding: 80px 0 120px;
}


/*フォントサイズ*/
.fs_80 {
    font-size: 80%;
}

.fs_90 {
    font-size: 90%;
}

.fs_110 {
    font-size: 110%;
}

.fs_120 {
    font-size: 120%;
}

.fs_130 {
    font-size: 130%;
}

.fs_150 {
    font-size: 150%;
}

.fs_180 {
    font-size: 180%;
}


/*改行調整*/
.br_tab {
    display: none;
}

.br_sp {
    display: none;
}

/*===========
テーブル(表)
===========*/
/*01*/
.table_simple {
    border-collapse: collapse;
    width: 100%;
}

.table_simple th,
.table_simple td {
    border-bottom: 1px solid #ddd;
    padding: 1em 1em 1em 0.5em;
}

.table_simple th {
    font-weight: bold;
    text-align: center;
    width: 30%;
    min-width: 5.5em;
}

/*02*/
.table_default {
    border-collapse: collapse;
    width: 100%;
    margin: 1.5em auto 1.5em auto;
    border: solid 1px #aaa;
}

.table_default tr {
    border-bottom: solid 1px #aaa;
}

.table_default th {
    position: relative;
    text-align: left;
    width: 26%;
    background-color: #ffb132;
    color: #444;
    text-align: center;
    padding: 16px 2%;
}

.table_default thead th {
    padding: 0.3rem 2%;
    background-color: #666;
    color: #fff;
    border-right: solid 1px #fff;
}

.table_default tbody th {
    background-color: #f3f3f3;
}

.table_default tbody td {
    background-color: #fff;
}

.table_default td {
    text-align: left;
    width: 66%;
    background-color: #f3f3f3;
    padding: 16px 2%;
}

/*リスト*/
.ul_disc li {
    list-style-type: disc;
    margin-left: 1.2em;
}

.ul_decimal li {
    list-style-type: decimal;
    margin-left: 1.2em;
}

.ol_lower_alpha {
    margin: 1.5em auto 1.5em 1.7em;
}

.ol_lower_alpha li.lower_alphaIn {
    list-style-type: none;
    counter-increment: cnt;
    position: relative;
    margin-bottom: 0.8rem;
}

.ol_lower_alpha li.lower_alphaIn::before {
    content: "("counter(cnt, lower-alpha)") ";
    text-align: right;
    position: absolute;
    top: 0;
    left: -1.7rem;
}

/*===========
タイトル
===========*/
h2 {
    font-size: 32px;
    margin-bottom: 1.5em;
    font-weight: 900;
    line-height: 1.3em;
}

h3 {
    font-size: 28px;
    font-weight: 800;
    margin-bottom: 1.5em;
    line-height: 1.3em;
}

/*01*/
.title_01 {
    padding: 0 1em 0.8em 0;
    border-bottom: 1px solid #ddd;
}

.title_01 span {
    font-size: 16px;
    display: block;
    margin-bottom: 8px;
}

/*02*/
.title_02 {
    padding: 0 1em 0.8em 0;
    border-bottom: 1px solid #ddd;
    text-align: center;
}

/*03*/
.title_03 {
    background-color: #f3f3f3;
    padding: 0.8em 0.8em;
}

/*===========
ボタン
===========*/
/*全共通*/
.btArea a {
    text-decoration: none;
    border-radius: 4px;
    padding: 0.7em 1em;
    width: 90%;
    display: block;
    text-align: center;
    max-width: 300px;
    margin: 1em auto;
}


/*ボタン01共通*/
.btArea .btn01 {
    background-color: #444;
    border: solid 1px #FFCB24;
    color: #FFCB24;
}

.btArea .btn01:hover {
    background-color: #FFCB24;
    color: #444;
}

/*ボタン02共通*/
.btArea .btn02 {
    border: solid 1px #444;
    color: #444;
}

.btArea .btn02:hover {
    background-color: #444;
    color: #fff;
}

/* ----------------------------------------------- */
/* 1000px以下 */
/* ----------------------------------------------- */
@media screen and (max-width: 1000px) {
    .content {
        width: 100%;
    }

    .content_inner {
        padding: 80px 0 160px;
    }

}

/* ----------------------------------------------- */
/* 768px以下 */
/* ----------------------------------------------- */
@media screen and (max-width: 768px) {
    .content_inner {
        padding: 80px 0 100px;
    }

    #sub_page .content_inner {
        padding: 80px 0 64px;
    }

    /*改行調整*/
    .br_tab {
        display: block;
    }

    /*===========
    テーブル(表)
    ===========*/
    /*01*/
    .table_simple tr {
        border-bottom: 1px dashed #444;
    }

    .table_simple th,
    .table_simple td {
        display: block;
        width: 100%;
        border-bottom: 0;
    }

    .table_simple th {
        text-align: left;
        padding: 1em 1em 0.2em 0.5em;
    }

    .table_simple td {
        padding: 0.2em 1em 1em 0.5em;
    }

    /*===========
    タイトル
    ===========*/
    h2 {
        font-size: 24px;
        margin-bottom: 1em;
    }

    h3 {
        font-size: 22px;
        margin-bottom: 1em;
    }

    /*===========
    ボタン
    ===========*/
    /*ボタン01 02共通*/
    .btArea .btn01::after,
    .btArea .btn02::after {
        width: 40px;
        height: 40px;
    }

}

/* ----------------------------------------------- */
/* 480px以下 */
/* ----------------------------------------------- */
@media screen and (max-width: 480px) {

    /*改行調整*/
    .br_sp {
        display: block;
    }

}

/* -----------------------------------------------------------

フェードインなどのアニメーション

----------------------------------------------------------- */
/*===========
フェードイン
===========*/

.fadeIn {
    animation: fadeIn 3s ease 0s 1 normal;
}

/* fadeIn */
@keyframes fadeIn {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }

    100% {
        opacity: 1;
    }
}

/*===========
フェードイン(スクロールで出現)
===========*/
/*----------------------------
scroll_up ｜下から上へ出現
----------------------------*/
.scroll_up {
    transition: 1s ease-in-out;
    transform: translateY(30px);
    opacity: 0;
}

.scroll_up.on {
    transform: translateY(0);
    opacity: 1.0;
}

/*----------------------------
scroll_left ｜左から出現
----------------------------*/
.scroll_left {
    -webkit-transition: 0.8s ease-in-out;
    -moz-transition: 0.8s ease-in-out;
    -o-transition: 0.8s ease-in-out;
    transition: 0.8s ease-in-out;
    transform: translateX(-30px);
    opacity: 0;
    filter: alpha(opacity=0);
    -moz-opacity: 0;
}

.scroll_left.on {
    opacity: 1.0;
    filter: alpha(opacity=100);
    -moz-opacity: 1.0;
    transform: translateX(0);
}

/*----------------------------
scroll_right ｜右から出現
----------------------------*/
.scroll_right {
    -webkit-transition: 0.8s ease-in-out;
    -moz-transition: 0.8s ease-in-out;
    -o-transition: 0.8s ease-in-out;
    transition: 0.8s ease-in-out;
    transform: translateX(30px);
    opacity: 0;
    filter: alpha(opacity=0);
    -moz-opacity: 0;
}

.scroll_right.on {
    opacity: 1.0;
    filter: alpha(opacity=100);
    -moz-opacity: 1.0;
    transform: translateX(0);
}

/*----------------------------
scroll_marker ｜マーカーを引く
----------------------------*/
.scroll_marker {
    background: linear-gradient(transparent 0%, rgb(255, 203, 36) 0%);
    display: inline;
    background-repeat: no-repeat;
    /* マーカーの横方向を0にして縮める */
    background-size: 0% 100%;
    transition: background-size 1.5s;
}

/* マーカーが引かれる際に付与するクラス */
.scroll_marker.on {
    /* 横方向を100%にして、マーカーを引く */
    background-size: 100% 100%;
}

/* -----------------------------------------------------------

斜め背景

----------------------------------------------------------- */
.bg_diagonal01 {
    -webkit-transform: rotate(12deg) translate3d(0, 0, 0);
    background: #F3F3F3;
    margin-left: -5%;
    transform: rotate(12deg) translate3d(0, 0, 0);
    width: 90%;
    height: 53vw;
    max-height: 640px;
    position: absolute;
    z-index: -1;
}


.bg_diagonal02 {
    -webkit-transform: rotate(-12deg) translate3d(0, 0, 0);
    background: #F3F3F3;
    margin-left: 17%;
    position: relative;
    transform: rotate(-12deg) translate3d(0, 0, 0);
    width: 90%;
    height: 50vw;
    max-height: 800px;
    position: absolute;
    z-index: -1;
    top: 20%;
}

/* -----------------------------------------------------------

ヘッダー

----------------------------------------------------------- */
#home .header {
    margin-bottom: 2em;
}

.header_content {
    width: 94%;
}

.header .header__inner {
    display: flex;
    justify-content: space-between;
    width: 94%;
    margin: 0 auto;
    padding: 0.5em 1% 0.5em 5%;
}

.header .logo {
    width: 120px;
}

.header .logo a:hover {
    opacity: 0.5;
}

.header .header_catch {
    text-align: right;
    line-height: 1.5em;
}

/* ----------------------------------------------- */
/* header 1000px以下 */
/* ----------------------------------------------- */
@media screen and (max-width: 1000px) {
    .header .header__inner {
        width: 90%;
        margin: 0 auto 0 0;
    }
}

/* ----------------------------------------------- */
/* header 768px以下 */
/* ----------------------------------------------- */
@media screen and (max-width: 768px) {

    .header .header__inner {
        display: block;
    }

    .header .header_catch {
        text-align: left;
        line-height: 1.2em;
    }

    /* ロゴ */
    .header .logo {
        width: 80px;
        margin-bottom: 1em;
    }
}

/* ----------------------------------------------- */

/* メニューウィンドウ */

/* ----------------------------------------------- */
.menu {
    position: relative;
}

.menu__inner {
    position: fixed;
    width: 6%;
    height: 100vh;
    top: 0;
    right: 0;
    z-index: 9999;
    border-left: solid 1px #444;
}



/* ハンバーガーボタンのデザイン */
.menu__button {
    position: relative;
}

.drawer__button {
    position: absolute;
    width: 3.5rem;
    height: 3.5rem;
    border: none;
    cursor: pointer;
    z-index: 999;
    left: 50%;
    transform: translateX(-50%);
    -webkit-transform: translateX(-50%);
    -ms-transform: translateX(-50%);
    top: 1rem;
}

/* ハンバーガーボタン内の線 */
.drawer__button > span {
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    width: 2.5rem;
    height: 3px;
    background-color: #605f5a;
    transform: translateX(-50%);
}

.drawer__button > span:first-child {
    transform: translate(-50%, calc(-50% - 0.8rem));
    transition: transform 0.3s ease;
}

.drawer__button > span:nth-child(2) {
    transform: translate(-50%, -50%);
    transition: opacity 0.3s ease;
}

.drawer__button > span:last-child {
    transform: translate(-50%, calc(-50% + 0.8rem));
    transition: transform 0.3s ease;
}

/* 展開時のデザイン */
.drawer__button.active > span:first-child {
    transform: translate(-50%, -50%) rotate(-45deg);

}

.drawer__button.active > span:nth-child(2) {
    opacity: 0;
}

.drawer__button.active > span:last-child {
    transform: translate(-50%, -50%) rotate(45deg);

}

/* メニューのデザイン */
.drawer__nav {
    position: fixed;
    /* 追従ヘッダーなどでも表示できるよう設定しておく */
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.3);
    transition: opacity 0.3s ease;
    opacity: 0;
    visibility: hidden;
}

.drawer__nav.active {
    opacity: 1;
    visibility: visible;
}

.drawer__nav__inner {
    position: relative;
    width: 600px;
    height: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    padding: 6rem 1.5rem 1rem;
    margin: 0 0 0 auto;
    overflow: scroll;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    border-left: solid 1px #444;
}

.drawer__nav.active .drawer__nav__inner {
    transform: translateX(0);
}

.drawer__nav__menu {
    list-style: none;
    padding-left: 0;
}

.drawer__nav__link {
    display: block;
    color: #444;
    text-decoration: none;
    padding: 1.2rem 1rem 1.2rem 1rem;
    border-bottom: dashed 1px #999;
    position: relative;
    line-height: 1.9em;
    font-weight: 800;
}


.drawer__nav__link:hover {
    background-color: #f4f4f4;
}

/* メニューアイコン */
.drawer__nav__link .fa-angles-right {
    margin-right: 10px;

}


/* ハンバーガーメニュー展開時、背景を固定 */
body.active {
    height: 100%;
    overflow: hidden;
}


/* ----------------------------------------------- */
/* menu 1000px以下 */
/* ----------------------------------------------- */
@media screen and (max-width: 1000px) {
    .menu__inner {
        border-left: 0;
        height: auto;
    }

    .drawer__button {
        top: 10px;
        right: 10px;
        left: auto;
        transform: translateX(0);
        -webkit-transform: translateX(0);
        -ms-transform: translateX(0);
        background-color: #fff;
        border: solid 1px #444;
    }
}

/* ----------------------------------------------- */
/* menu 768px以下 */
/* ----------------------------------------------- */
@media screen and (max-width: 768px) {

    /* メニューのデザイン */
    .drawer__nav__inner {
        width: 80%;
    }

    .drawer__button {
        right: 1rem;
        top: 1rem;
    }

}

/* ----------------------------------------------- */
/* header 480px以下 */
/* ----------------------------------------------- */
@media screen and (max-width: 480px) {

    /* ----------------------------------------------- */
    /* メニューウィンドウ */
    /* ----------------------------------------------- */
    .drawer__nav__inner {
        padding: 4.5rem 1.5rem 1rem;
    }

    .drawer__button {
        width: 3rem;
        height: 3rem;
    }

    .drawer__button > span {
        width: 2rem;
    }
}

/* -----------------------------------------------------------

フッター

----------------------------------------------------------- */
footer {
    background-color: #444;
    color: #fff;
}

footer .footerIN {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 0 24px 0;
}

/*フッター上部*/
footer .footer_info {
    margin: 0 auto 32px auto;
}


footer .footer_info .footer_logo a {
    width: 60%;
    transition: all 0.5s;
    max-width: 200px;
    display: block;
    margin: auto;
}

footer .footer_info .footer_logo a:hover {
    opacity: 0.5;
    transition: all 0.5s;
}

footer .footer_info .footer_address {
    text-align: center;
    margin: 1.5em auto;
}

/*フッターメニュー*/
.footer_menu .footer__menu_list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    border-top: 1px solid #777;
    padding: 0.5em 0;
    font-size: 15px;
    border-bottom: 1px solid #777;
}

.footer_menu .footer__menu_list li {
    margin: 8px 20px;
}

.footer_menu .footer__menu_list a {
    color: #fff;
    text-decoration: none;
    position: relative;
}

.footer_menu .footer__menu_list a:hover {
    color: #FFCB24;
}

/*コピーライト*/
#copyright {
    font-size: 14px;
    text-align: center;
    margin-top: 24px;
}

/* ----------------------------------------------- */
/* footer 768px以下 */
/* ----------------------------------------------- */
@media screen and (max-width: 768px) {

    /*フッター上部*/
    footer .footer_info {}



    /*フッターメニュー*/
    .footer_menu .footer__menu_list {
        display: block;
        padding: 0;
    }

    .footer_menu .footer__menu_list li {
        margin: auto;
        text-align: center;
        padding: 1.2em;
        border-bottom: 1px solid #777;
    }

    .footer_menu .footer__menu_list a {
        display: block;
    }

}

/* -----------------------------------------------------------

MV

----------------------------------------------------------- */
#home .mv {
    margin-bottom: 5em;
}

#home .mv img {
    width: 99%;
    max-width: 1600px;
    margin: auto;
    display: block;
}

/* ----------------------------------------------- */
/* 目標 768px以下 */
/* ----------------------------------------------- */
@media screen and (max-width: 768px) {
    #home .mv {
        margin-bottom: 2em;
    }
}

/* -----------------------------------------------------------

目標

----------------------------------------------------------- */

/*ロゴ*/
#home .goal .logo {
    text-align: center;
    margin-bottom: 3.5em;
}

#home .goal .logo img {
    max-width: 300px;
}

/*テキスト*/
#home .goal .txtArea {
    text-align: center;
}

#home .goal .txtArea h2 {
    margin-bottom: 1.5em;
}

#home .goal .txtArea p {
    font-size: 20px;
    line-height: 2em;
}

/* ----------------------------------------------- */
/* 目標 768px以下 */
/* ----------------------------------------------- */
@media screen and (max-width: 768px) {

    /*ロゴ*/
    #home .goal .logo img {
        max-width: 240px;
        width: 50%;
    }

    /*テキスト*/
    #home .goal .txtArea p {
        font-size: 16px;
        line-height: 2em;
    }
}

/* -----------------------------------------------------------

about us 会社概要

----------------------------------------------------------- */
#home .aboutus {
    position: relative;
}

/*タイトル*/
#home .aboutus .ttl_img {
    max-width: 1820px;
    margin: auto;
}

#home .aboutus .ttl_img img {
    position: absolute;
    left: 0;
    width: 7.5vw;
    top: 0;
    max-width: 100px;
}

#home .aboutus table {
    margin: auto;
}

/* ----------------------------------------------- */
/* about us 会社概要 1300px以下 */
/* ----------------------------------------------- */
@media screen and (max-width: 1300px) {

    /*タイトルに被らないように調整*/
    #home .aboutus table {
        width: 92%;
    }
}

/* ----------------------------------------------- */
/* about us 会社概要 1000px以下 */
/* ----------------------------------------------- */
@media screen and (max-width: 1000px) {

    /*タイトル*/
    #home .aboutus .ttl_img img {
        max-width: 340px;
        width: 60%;
    }

    #home .aboutus table {
        width: 100%;
    }
}

/* -----------------------------------------------------------

message メッセージ

----------------------------------------------------------- */
#home .message {
    position: relative;
}

/*タイトル*/
#home .message .ttl_img {
    max-width: 1820px;
    margin: auto;
}

#home .message .ttl_img img {
    position: absolute;
    right: 0;
    width: 9.5vw;
    top: -10%;
    max-width: 110px;
}

/*挨拶*/
#home .message .ceo {
    display: flex;
    flex-wrap: wrap;
    margin-bottom: 4em;
}

#home .message .ceo .txtArea {
    width: 60%;
    margin-right: 5%;
}

#home .message .ceo .imgArea {
    width: 35%;
}

/*メッセージ文*/
#home .message .main_message .main_messageIn01 {
    margin-bottom: 2em;
}

#home .message .main_message .main_messageIn02 {
    margin-top: 2em;
}

/* ----------------------------------------------- */
/* message メッセージ 1300px以下 */
/* ----------------------------------------------- */
@media screen and (max-width: 1300px) {

    /*タイトルに被らないように調整*/
    #home .message .ceo {
        width: 92%;
    }
}

/* ----------------------------------------------- */
/* message メッセージ 1000px以下 */
/* ----------------------------------------------- */
@media screen and (max-width: 1000px) {
    #home .message .ceo {
        width: 100%;
    }

    #home .message .ttl_img img {
        max-width: 340px;
        width: 60%;
    }
}

/* ----------------------------------------------- */
/* message メッセージ 768px以下 */
/* ----------------------------------------------- */
@media screen and (max-width: 768px) {

    /*挨拶*/
    #home .message .ceo .txtArea {
        width: 100%;
        margin-right: 0;
        margin-bottom: 1.5em;
    }

    #home .message .ceo .imgArea {
        width: 50%;
        max-width: 300px;
        margin: 0 0 0 auto;
    }
}

/* -----------------------------------------------------------

Service サービス

----------------------------------------------------------- */
.service .content_inner {
    padding: 64px 0 200px;
}

/*タイトル*/
.service .ttl_img {
    max-width: 1600px;
    margin: auto;
}

.service .ttl_img img {
    width: 31vw;
    max-width: 420px;
}

/*アコーディオン*/
.service .service_item {
    margin: 0 auto;
    border-bottom: 1px solid #ddd;
    border-top: 1px solid #ddd;
    overflow: hidden;
}

.service .service_list_trigger {
    font-family: "Zen Old Mincho", serif;
    font-size: 24px;
    font-weight: 800;
    color: #555;
    width: 100%;
    padding: 1.5em 1em;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: inherit;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s;
}

.service .service_list_trigger:hover {}


.service .accordion_content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.2s ease-in-out;
}

.service .accordion_content.open {
    max-height: 200px;
}

.service .accordion_contentIn {
    padding: 1em 1em 2em 1em;
}

/*アコーディオン アイコン*/
.service .accordion-icon {
    transition: transform 0.2s;
    background-color: #ffcb24;
    border-radius: 50px;
    width: 40px;
    height: 40px;
}

.service .service_list_trigger[aria-expanded="true"] .accordion-icon {
    transform: rotate(180deg);
}

/* ----------------------------------------------- */
/* Service サービス 1000px以下 */
/* ----------------------------------------------- */
@media screen and (max-width: 1000px) {

    /*タイトル*/
    .service .ttl_img img {
        max-width: 290px;
        width: 50%;
    }
}

/* ----------------------------------------------- */
/* Service サービス 768px以下 */
/* ----------------------------------------------- */
@media screen and (max-width: 768px) {
    .service .content_inner {
        padding: 40px 0 100px;
    }

    .service .service_list_trigger {
        font-size: 18px;
        padding: 1em 0.5em;
    }

    /*アコーディオン アイコン*/
    .service .accordion-icon {
        width: 30px;
        height: 30px;
    }

}

/* -----------------------------------------------------------

子ページ タイトル

----------------------------------------------------------- */
#sub_mv {
    position: relative;

}

#sub_mv .circles_bg_anime {
    height: 260px;
}

#sub_mv h2 {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    -webkit-transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
    color: #555;
    font-size: 140%;
    letter-spacing: 3px;
    width: 90%;
    text-align: center;
}

/* ----------------------------------------------- */
/* 子ページ タイトル 768px以下 */
/* ----------------------------------------------- */
@media screen and (max-width: 768px) {
    #sub_mv .circles_bg_anime {
        height: 200px;
    }

    #sub_mv h2 {
        font-size: 18px;
    }
}

/* -----------------------------------------------------------

パンくず

----------------------------------------------------------- */
.breadcrumb .breadcrumb_inner {
    margin: 0 auto;
    padding: 1em 1% 1em 5%;
}

.breadcrumb ol {
    display: flex;
    flex-wrap: wrap;
    list-style: none;
    font-size: 0.8em;
}

.breadcrumb li:not(:last-of-type)::after {
    content: "|";
    margin: 0 .6em;
    /* 記号の左右の余白 */
    color: #777;
    /* 記号の色 */
}

/* -----------------------------------------------------------

404 Not Found

----------------------------------------------------------- */
.not-found-page .content_inner {
    min-height: 500px;
}

.not-found-page .content_inner p {
    margin-bottom: 3em;
}

/* -----------------------------------------------------------

ページTOPボタン

----------------------------------------------------------- */
.pagetopBtn {
    position: absolute;
    bottom: 0;
    width: 100%;
    border-top: solid 1px #444;
    cursor: pointer;
    text-align: center;
}

.pagetopBtn a {
    display: block;
    height: 64px;
    line-height: 64px;

}

.pagetopBtn a:hover {
    background-color: #444;
    color: #fff;
}

/* ----------------------------------------------- */
/* ページTOPボタン 1000px以下 */
/* ----------------------------------------------- */
@media screen and (max-width: 1000px) {
    .pagetopBtn {
        display: none;
    }
}

/* -----------------------------------------------------------

背景パーティクルの調整

----------------------------------------------------------- */
.particles-wrap {
    width: 100%;
    position: relative;
    /*基準要素、子の基準となる*/
}

/*アニメーション描画用*/
canvas {
    position: fixed;
    /*位置指定*/
    top: 0;
    right: 0;
    z-index: -1;
    /*重ね順を-1に　※1以上だとほかのコンテンツの上に被さってしまいます*/
}