@media screen and (max-width:979px) {
  body {
    font-size: 15px;
    padding: 74px 0 0;
  }

  .icon-gray {
    color: #1d1d1d
  }

  /* ------------------------------------------------------------
    ヘッダー部分
------------------------------------------------------------ */
  header {
    background: #080808;
    width: 100%;
    min-height: 70px;
    padding: 10px;
    position: fixed;
    top: 0;
    left: 0;
    box-sizing: border-box;
    z-index: 11;
    padding: 10px 70px 10px 10px;
  }

  header h1 {
    width: 129px;
    height: 20px;
    margin-top: 15px;
    margin-left: 10px;
  }

  header h1 img {
    width: 100%;
    height: 100%;
  }

  header .btn_area {
    width: 50px;
    position: absolute;
    top: 10px;
    right: 10px;
  }

  header .btn_area li {
    width: 50px;
    height: 50px;
    display: inline-block;
  }

  header .btn_area li.menu a {
    display: inline-block;
    ;
    position: relative;
    width: 50px;
    height: 50px;
  }

  header .btn_area li.menu a span {
    display: inline-block;
    transition: all .4s;
    /*アニメーションの設定*/
    position: absolute;
    left: 14px;
    height: 2px;
    border-radius: 5px;
    background: #fff;
    width: 45%;
  }

  header .btn_area li.menu a span:nth-of-type(1) {
    top: 13px;
  }

  header .btn_area li.menu a span:nth-of-type(2) {
    top: 19px;
  }

  header .btn_area li.menu a span:nth-of-type(3) {
    top: 25px;
  }

  header .btn_area li.menu a span:nth-of-type(3)::after {
    content: "Menu";
    width: 50px;
    position: absolute;
    top: 10px;
    left: -14px;
    color: #fff;
    font-size: 10px;
    text-align: center;
    text-transform: uppercase;
  }

  header .btn_area li.menu a.active span:nth-of-type(1) {
    top: 14px;
    left: 18px;
    transform: translateY(6px) rotate(-45deg);
    width: 30%;
  }

  header .btn_area li.menu a.active span:nth-of-type(2) {
    opacity: 0;
  }

  header .btn_area li.menu a.active span:nth-of-type(3) {
    top: 26px;
    left: 18px;
    transform: translateY(-6px) rotate(45deg);
    width: 30%;
  }

  header .btn_area li.menu a.active span:nth-of-type(3)::after {
    content: "Close";
    /*3つ目の要素のafterにClose表示を指定*/
    left: -4px;
    transform: translateY(0) rotate(-45deg);
  }

  header nav {
    display: none;
    background: #393939;
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
  }

  header nav ul {
    border-top: #ccc solid 1px;
  }

  header nav ul li {
    border-bottom: #ccc solid 1px;
    font-size: 16px;
  }

  header nav ul li a {
    font-family: 'Open Sans', sans-serif;
    width: auto;
    height: 50px;
    line-height: 50px;
    display: block;
    color: #fff;
    font-weight: bold;
    letter-spacing: 2px;
    text-decoration: none;
    text-indent: 20px;
  }

  /*header nav ul li a:before{
        content:">";
        display:inline-block;
        vertical-align:middle;
        margin:0 15px 0 0;
    }*/
  header nav ul li a:before {
    font-family: "Font Awesome 5 Free";
    display: inline-block;
    vertical-align: middle;
    content: "\f105";
    margin: 0 15px 0 0;
    color: #fff;
  }

  header nav ul li a small {
    font-size: 10px;
    display: inline-block;
    margin: 0 0 0 10px;
  }

  /* ------------------------------------------------------------
    共通部分
------------------------------------------------------------ */

  article section h2 {
    font-family: 'Open Sans', sans-serif;
    font-size: 32px;
    line-height: 1.4;
    letter-spacing: 2px;
    margin: 0 0 30px;
    padding: 0 20px;
    font-weight: bold;
    text-align: center;
    color: #fff;
  }

  /* ------------------------------------------------------------
    メインイメージ部分
------------------------------------------------------------ */
  .topimage {
    width: 100%;
    display: table;
    position: relative;
    overflow: hidden;
    background: url(../images/mainimage02.jpg);
    background-size: cover;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    background-repeat: no-repeat;
    background-position: 50% 50%;
  }

  .topimage:after {
    content: "";
    background: rgba(0, 0, 0, 0.3);
    width: 100%;
    display: block;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    z-index: 8;
  }

  .topimage .textblock {
    display: table-cell;
    vertical-align: middle;
    z-index: 9;
    position: relative;
    top: 30px;
    text-align: center;
  }

  .topimage .textblock .toplogo {
    margin: 0 auto 15px;
    width: 290px;
    height: 45px;
  }

  .topimage .textblock .toplogo img {
    width: 100%;
    height: 100%;
  }

  .topimage .textblock p {
    margin: 0 20px 10px;
    font-size: 20px;
    color: #fff;
    font-weight: bold;
    line-height: 1.5;
    letter-spacing: 0.05em;
    text-align: center;
  }

  .topimage .btn_service a {
    width: 50px;
    height: 50px;
    border-radius: 27px;
    display: block;
    margin: 0 auto;
    text-decoration: none;
    text-align: center;
    position: absolute;
    bottom: 40px;
    left: 0;
    right: 0;
  }

  .topimage__btn {
    width: 80px;
    position: absolute;
    bottom: 15px;
    right: 10px;
    z-index: 10;
    /*background: rgba(255,255,255, 0.8);
        border-radius: 5px;
        overflow: hidden;*/
  }

  .topimage__btn a {
    -webkit-transition: all 1s;
    -moz-transition: all 1s;
    -ms-transition: all 1s;
    -o-transition: all 1s;
    transition: all 1s;
  }

  .topimage__btn img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  /* ------------------------------------------------------------
    what is部分
------------------------------------------------------------ */
  article .about {
    padding: 60px 30px;
    position: relative;
  }

  article .about p {
    color: #fff;
    text-align: center;
  }

  /* ------------------------------------------------------------
    特徴部分
------------------------------------------------------------ */
  article .features {
    background: #1e1e1e;
    padding: 60px 30px;
    position: relative;
    z-index: 0;
  }

  .features__list {
    margin-top: 10px;
    padding: 30px 0 0;
  }

  .features__list li:nth-of-type(n+2) {
    margin-top: 30px;
    padding: 30px 0 0;
    border-top: #333 dashed 1px;
  }

  .features__list li .features__list__image {
    overflow: hidden;
  }

  .features__list li img {
    width: 100%;
  }

  .features__list__heading {
    margin: 20px 0 0;
    font-size: 18px;
    font-weight: bold;
    text-align: center;
    color: #fff;
    position: relative;
  }

  .features__list p {
    margin: 20px 0;
    color: #fff;
  }

  /* ------------------------------------------------------------
    動画部分
------------------------------------------------------------ */

  article .videoTop {
    background: #393939;
    padding: 60px 30px;
    position: relative;
    z-index: 0;
  }

  article .videoTop .productvideo {
    margin: 0 auto;
  }

  article .videoTop .productvideo iframe {
    aspect-ratio: 16 / 9;
    width: 100%;
    height: 100%;
    border: none;
  }

  /* ------------------------------------------------------------
    HIGHLIGHT部分
------------------------------------------------------------ */
  article .highlight {
    padding: 60px 30px 30px;
  }

  article .highlight .highlight__type:nth-of-type(1) figure {
    background: url(../images/img_display.jpg) center;
    background-size: cover;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    height: 240px;
    margin-left: -30px;
  }

  article .highlight__type:nth-of-type(2) figure {
    background: url(../images/img_camera.jpg) center;
    background-size: cover;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    height: 240px;
    margin-right: -30px;
  }

  article .highlight__type:nth-of-type(3) figure {
    background: url(../images/img_speakers.jpg) center;
    background-size: cover;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    height: 240px;
    margin-left: -30px;
  }

  article .highlight__type:nth-of-type(4) figure {
    background: url(../images/img_microphone.jpg) center;
    background-size: cover;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    height: 240px;
    margin-right: -30px;
  }

  article .highlight__type:nth-of-type(5) figure {
    background: url(../images/img_mirroring.jpg) center;
    background-size: cover;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    height: 240px;
    margin-left: -30px;
  }

  article .highlight__type:nth-of-type(6) figure {
    background: url(../images/img_windows.jpg) center;
    background-size: cover;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    height: 240px;
    margin-right: -30px;
  }

  article .highlight .highlight__inner {
    margin: 20px 0 40px;
    color: #fff;
  }

  article .highlight h3 {
    margin: 0 0 15px;
    font-size: 20px;
    font-weight: bold;
  }

  article .highlight p+p {
    margin-top: 10px;
  }


  /* ------------------------------------------------------------
    よくあるご質問部分
------------------------------------------------------------ */
  article .faqTop {
    background: #1e1e1e;
    padding: 60px 30px;
    position: relative;
    z-index: 0;
  }

  .accordion {
    margin: 3em 0;
    width: 100%;
  }

  .toggle {
    display: none;
  }

  .option {
    position: relative;
    margin-bottom: 1em;
  }

  .title,
  .content {
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
    transform: translateZ(0);
    transition: all 0.3s;
  }

  .title {
    border: solid 1px #ccc;
    padding: 1em 2em 1em 1em;
    display: block;
    background: #fff;
    color: #1a1a1a;
    font-weight: bold;
    cursor: pointer;
  }

  .title::after,
  .title::before {
    content: "";
    position: absolute;
    right: 1.25em;
    top: 1.5em;
    width: 2px;
    height: 0.75em;
    background-color: #999;
    transition: all 0.3s;
  }

  .title::after {
    transform: rotate(90deg);
  }

  .content {
    max-height: 0;
    overflow: hidden;
  }

  .content p {
    border-bottom: solid 1px #ccc;
    background: #f5f5f5;
    margin: 0;
    padding: 1em 2em 1em 1em;
    font-size: 1em;
    line-height: 1.8;
  }

  .toggle:checked+.title+.content {
    max-height: 500px;
    transition: all 1.5s;
  }

  .toggle:checked+.title::before {
    transform: rotate(90deg) !important;
  }

  /* ------------------------------------------------------------
    フッター部分
------------------------------------------------------------ */
  footer {
    background: #080808;
  }

  footer .special__heading {
    margin: 80px auto;
    background: #080808;
    width: 250px;
    height: 39px;
  }

  footer .special__heading img {
    width: 100%;
    height: 100%;
  }

  footer .contact {
    background: #0085C7;
    background: url(../images/img_contact.jpg) center;
    background-size: cover;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    padding: 30px;
    position: relative;
    z-index: 1;
  }

  footer .contact:after {
    content: "";
    position: absolute;
    top: 10px;
    bottom: 10px;
    left: 10px;
    right: 10px;
    border: #fff solid 4px;
    z-index: -1;
  }

  footer .contact:before {
    content: "";
    background: rgba(0, 0, 0, 0.44);
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: -1;
  }

  footer .contact h2 {
    font-size: 24px;
    letter-spacing: 2px;
    margin: 0 0 15px;
    color: #fff;
    text-align: center;
  }

  footer .contact .read {
    color: #fff;
    font-weight: bold;
    text-align: center;
  }

  footer .contact .btn__form {
    width: 60vw;
    margin: 20px auto 30px;

  }

  footer .contact .btn__form a {
    width: auto;
    display: block;
    padding: 15px 0;
    color: #fff;
    text-decoration: none;
    background: #0085c6;
    border-radius: 30px;
    font-size: 1rem;
    font-weight: bold;
    text-align: center;
    line-height: 1.0;
    border: #fff solid 2px;
  }

  footer .contact .tellist {
    margin-top: 10px;
    font-size: 0;
    text-align: center;
    color: #fff;
  }

  footer .contact .tellist li {
    font-size: 25px;
    line-height: 1.0;
    font-family: Arial, Helvetica, sans-serif;
    font-weight: bold;
    letter-spacing: 2px;
    display: inline-block;
    margin: 0 30px;
  }

  footer .contact .tellist li a {
    color: #fff;
    text-decoration: none;
  }

  footer .contact .tellist li:before {
    content: "";
    width: 25px;
    height: 25px;
    display: inline-block;
    vertical-align: middle;
    margin: 0 10px 5px 0;
  }

  footer .tellist li:nth-of-type(1):before {
    background: url(../images/icon_tel.png) no-repeat;
    background-size: cover;
    -webkit-background-size: cover;
    -moz-background-size: cover;
  }

  footer .contact dl {
    margin: 30px 0 0;
    padding: 15px;
    background: rgba(255, 255, 255, 0.8);
    font-size: 0;
  }

  footer .contact dl dt {
    width: 25%;
    font-weight: bold;
    display: inline-block;
    vertical-align: top;
    font-size: 14px;
  }

  footer .contact dl dd {
    width: 75%;
    display: inline-block;
    vertical-align: top;
    font-size: 14px;
  }

  footer .contact dl dd:not(:last-of-type) {}

  footer .inner {
    padding: 60px 30px;
  }

  footer .inner address {
    font-style: normal;
    color: #fff;
  }

  footer .inner address h2 {
    font-size: 20px;
    font-weight: bold;
    margin: 0 0 10px;
  }

  footer .inner address dl {
    margin: 0 0 30px;
    display: -webkit-flex;
    display: flex;
    -webkit-flex-wrap: wrap;
    flex-wrap: wrap;
  }

  footer .inner address dl dt {
    font-weight: bold;
    width: 20%;
    padding: 5px 0;
    box-sizing: border-box;
  }

  footer .inner address dl dd {
    width: 80%;
    padding: 5px 0;
  }

  footer .inner address dl dd a {
    color: #fff;
    text-decoration: none;
  }

  footer .inner address dl dd a:hover {
    color: #0085C7;
  }

  footer .inner .sns {
    text-align: center;
    margin-top: 15px;
  }

  footer .inner .sns ul {
    font-size: 0;
  }

  footer .inner .sns ul li {
    background: #0085C7;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    font-size: 14px;
    overflow: hidden;
    display: inline-block;
  }

  footer .inner .sns ul li:not(:last-of-type) {
    margin-right: 15px;
  }

  footer small {
    text-align: right;
    display: block;
    padding: 0 30px 30px 0;
    color: #999;
  }

  footer small a {
    color: #999;
    text-decoration: none;
  }

  footer small a:hover {
    color: #0085C7;
  }

}