@media screen and (min-width: 769px) {
  main .page_headline {
    background: linear-gradient(180deg, rgba(0, 140, 214, 0.9), rgba(29, 76, 145, 0.9)), url(../img/interactive_training/mv.png) center center/cover no-repeat;
  }
  main .about_us {
    position: relative;
    width: 100%;
    padding: 70px 0 125px;
    background-color: #f5f5f5;
    height: 607px;
    box-sizing: border-box;
  }
  main .about_us .bg_white {
    position: absolute;
    left: 0;
    top: 100px;
    width: calc(50vw + 100px);
    min-width: 1016px;
    height: 520px;
    background-color: #ffffff;
  }
  main .about_us .bg_bluegrey {
    position: absolute;
    right: 0;
    bottom: -70px;
    width: calc(50vw + 50px);
    min-width: 968px;
    height: 350px;
    background-color: #dde4ef;
  }
  main .about_us .content {
    position: relative;
    width: 490px;
    margin-top: 40px;
  }
  main .about_us .content p {
    font-size: 1.8rem;
    color: #777777;
    line-height: 1.5;
  }
  main .about_us .content p+p {
    margin-top: 1.8em;
  }
  main .about_us .container {
    position: relative;
    padding: 0 160px;
    box-sizing: border-box;
  }
  main .about_us .container .mock {
    position: absolute;
    left: 650px;
    top: -40px;
    width: 549px;
    height: 418px;
  }
  main .about_us .container .mock .tablet {
    position: absolute;
    left: 60px;
    top: 0;
  }
  main .about_us .container .mock .smartphone {
    position: absolute;
    right: -150px;
    bottom: -140px;
  }

  main .course {
    text-align: center;
    background-color: #f5f5f5;
    padding-top: 200px;
    padding-bottom: 114px;
  }
  main .course .content {
    padding-top: 50px;
  }
  main .course .content p {
    font-size: 1.8rem;
    color: #000;
    line-height: 2.5;
  }
  main .course .course_list {
    padding-top: 80px;
  }
  main .course .course_list table {
    margin: 0 auto;
  }
  main .course .course_list table th,
  main .course .course_list table td {
    border:1px solid #000066;
  }
  main .course .course_list table thead th {
    text-align: center;
    height: 67px;
    color: #ffffff;
    background: #1E4D91;
  }
  main .course .course_list table thead th.head_title {
    width: 372px;
  }
  main .course .course_list table thead th.head_summary {
    width: 828px;
  }
  main .course .course_list table tbody th {
    font-weight: bold;
    background: #ffffff;
    text-align: center;
    line-height: calc(30 / 18);
  }
  main .course .course_list table tbody td.body_summary {
    background: #ffffff;
    padding: 22px 15px;
    line-height: calc(30 / 16);
  }
  main .course .course_list table tbody td.body_day {
    background: #ffffff;
    padding: 22px 15px;
    line-height: calc(30 / 16);
  }
  main .course .course_list table tbody td.body_teacher {
    background: #ffffff;
    padding: 22px 15px;
    line-height: calc(30 / 16);
  }
  main .course .course_list table tbody td.body_summary > div {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  main .course .course_list table tbody td .course_link {
    margin-left: 15px;
  }
  main .course .course_list table tbody td .course_link a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 210px;
    font-size: 18px;
    color: #ffffff;
    background: #E37C23;
    text-decoration: none;
  }
  main .notes {
    text-align: left;
    font-size: 1.3rem;
    width: 1105px;
    margin: auto;
    margin-top: 10px;
  }
}

@media screen and (max-width: 768px) {
  main .page_headline {
    background: linear-gradient(180deg, rgba(0, 140, 214, 0.9), rgba(29, 76, 145, 0.9)), url(../img/interactive_training/mv_sp.png) center center/cover no-repeat;
  }
  main .about_us {
    position: relative;
    width: 100%;
    padding: 13.33333vw 30px 40px;
    background-color: #f5f5f5;
    height: 510px;
    box-sizing: border-box;
  }
  main .about_us .bg_white {
    position: absolute;
    left: 0;
    top: 25px;
    width: 100%;
    height: 610px;
    background-color: #ffffff;
  }
  main .about_us .bg_bluegrey {
    position: absolute;
    right: 0;
    bottom: -200px;
    width: 305px;
    height: 345px;
    background-color: #dde4ef;
  }
  main .about_us .content {
    position: relative;
    margin-top: 20px;
  }
  main .about_us .content p {
    font-size: 1.5rem;
    color: #777777;
    line-height: 1.5;
  }
  main .about_us .content p+p {
    margin-top: 1.8em;
  }
  main .about_us .container {
    position: relative;
  }
  main .about_us .container .mock {
    position: relative;
    width: 100%;
    height: 220px;
    margin-top: 20px;
  }
  main .about_us .container .mock .tablet {
    position: absolute;
    width: 100%;
    left: 0;
    top: 0;
  }
  main .about_us .container .mock .smartphone {
    position: absolute;
    width: 120px;
    right: -10px;
    bottom: -40px;
  }
  main .course {
    text-align: center;
    background-color: #f5f5f5;
    padding-top: 280px;
    padding-bottom: 58px;
  }
  main .course .content {
    padding-top: 20px;
  }
  main .course .content p {
    font-size: 1.5rem;
    color: #000;
    line-height: 2;
  }
  main .course .course_list {
    padding: 20px 3% 0;
  }
  main .course .course_list table {
    margin: 0 auto;
    width: 100%;
  }
  main .course .course_list table th,
  main .course .course_list table td {
    border:1px solid #000066;
  }
  main .course .course_list table thead th {
    text-align: center;
    height: 40px;
    color: #ffffff;
    background: #1E4D91;
    font-size: 1.3rem;
  }
  main .course .course_list table thead th.head_title {
    width: 30%;
  }
  main .course .course_list table thead th.head_summary {
    width: 70%;
  }
  main .course .course_list table tbody th {
    font-weight: bold;
    background: #ffffff;
    text-align: center;
    font-size: 1.2rem;
    line-height: 1.5;
  }
  main .course .course_list table tbody td {
    font-size: 1.3rem;
    line-height: 1.5;
  }
  main .course .course_list table tbody td.body_summary {
    background: #ffffff;
    padding: 12px 16px;
    line-height: calc(30 / 16);
  }
  main .course .course_list table tbody td.body_summary p {
    font-size: 1.3rem;
  }
  main .course .course_list table tbody td.body_day {
    background: #ffffff;
    padding: 12px 16px;
    line-height: calc(30 / 16);
  }
  main .course .course_list table tbody td.body_day p {
    font-size: 1.3rem;
  }
  main .course .course_list table tbody td.body_teacher {
    background: #ffffff;
    padding: 12px 16px;
    line-height: calc(30 / 16);
  }
  main .course .course_list table tbody td.body_teacher p {
    font-size: 1.3rem;
  }
  main .course .course_list table tbody td .course_link {
    margin-top: 15px;
  }
  main .course .course_list table tbody td .course_link a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 42px;
    font-size: 1.3rem;
    color: #ffffff;
    background: #E37C23;
    text-decoration: none;
  }
  main .notes {
    text-align: left;
    font-size: 1.3rem;
    width: 100%;
    margin: auto;
    margin-top: 10px;
  }
}

@-webkit-keyframes scroll_line {
  0% {
    transform-origin: top;
    transform: scale(1, 0);
  }
  10% {
    transform-origin: top;
    transform: scale(1, 0);
    -webkit-animation-timing-function: ease-in;
    animation-timing-function: ease-in;
  }
  45% {
    transform-origin: top;
    transform: scale(1, 1);
  }
  55% {
    transform-origin: bottom;
    transform: scale(1, 1);
    -webkit-animation-timing-function: ease-in;
    animation-timing-function: ease-in;
  }
  90% {
    transform-origin: bottom;
    transform: scale(1, 0);
  }
  100% {
    transform-origin: bottom;
    transform: scale(1, 0);
  }
}

@keyframes scroll_line {
  0% {
    transform-origin: top;
    transform: scale(1, 0);
  }
  10% {
    transform-origin: top;
    transform: scale(1, 0);
    -webkit-animation-timing-function: ease-in;
    animation-timing-function: ease-in;
  }
  45% {
    transform-origin: top;
    transform: scale(1, 1);
  }
  55% {
    transform-origin: bottom;
    transform: scale(1, 1);
    -webkit-animation-timing-function: ease-in;
    animation-timing-function: ease-in;
  }
  90% {
    transform-origin: bottom;
    transform: scale(1, 0);
  }
  100% {
    transform-origin: bottom;
    transform: scale(1, 0);
  }
}

@-webkit-keyframes accordion_open {
  0% {
    display: none;
    transform: scaleY(0);
  }
  1% {
    display: flex;
    transform: scaleY(0);
  }
  100% {
    display: flex;
    transform: scaleY(1);
  }
}

@keyframes accordion_open {
  0% {
    display: none;
    transform: scaleY(0);
  }
  1% {
    display: flex;
    transform: scaleY(0);
  }
  100% {
    display: flex;
    transform: scaleY(1);
  }
}