@media all and (max-width: 1000px) {
  body {
    font-size: 12px;
    font-family: Verdana, sans-serif;
    color: #333;
    margin: 0;
  }

  header h1 {
    margin-top: 0;
    font-weight: normal;
    font-size: 22px;
    margin-bottom: 8px;
  }

  .section-title {
    text-align: center;
    /* text-decoration : underline; */
    font-weight: bold;
    font-size: 22px;
    margin-bottom: 60px;
    margin-top: 0;
  }

  details {
    background: #fafafa;
    border: 1px solid #eee;
    border-radius: 4px;
    margin-bottom: 15px;
    font-size: 12px;
    display: block;
  }

  .feature h1 {
    font-weight: bold;
    font-size: 22px;
  }

  .page-layout {
    width: 100%;
    padding: 16px 0 0;
  }

  .page-main {
    width: 100%;
  }

  .page-outline {
    position: static;
    width: auto;
    margin: 0 16px 20px;
    padding: 14px 16px;
    border-radius: 14px;
    flex-wrap: wrap;
    gap: 10px;
    max-height: none;
  }

  .page-outline.is-collapsed {
    padding: 12px 14px;
  }

  .page-outline__toggle {
    width: auto;
    padding: 6px 9px;
    font-size: 12px;
  }

  .page-outline__body {
    width: 100%;
    flex-wrap: wrap;
    gap: 10px;
  }

  .page-outline__current {
    font-size: 14px;
  }

  .page-outline__list {
    width: 100%;
    gap: 6px;
  }

  .page-outline__list a {
    padding: 7px 10px;
    font-size: 13px;
  }

  .container {
    width: 100%;
    text-align: center;
  }

  .bar{
    text-align: left;
  }

  .calender{
    width: 80%;
    margin-left: auto;
    margin-right: auto;
  }

  .schedule-note {
    font-size: 16px;
  }

  .archive{
    width: 100%;
  }

  .feature {
    width: 100%;
    text-align: center;
  }

.feature .desc {
  width: 100%;
  padding: 0 16px;
  box-sizing: border-box;
}


  .feature li{
    text-align: left;
  }

  .feature .calender img{
    width: 100%;
  }

  .features .feature h1{
    display: none;
  }

  .feature:nth-of-type(odd) .desc{
    float: none;
    padding-left: 0px;
    width:100%;
  }

  .feature:nth-of-type(even) .desc{
    float: none;
    padding-right: 0px;
    width:100%;
  }

  .voice{
    width: 95%;
    margin-left: auto;
    margin-right: auto;
    text-align: left;
  }

/*
  details {
    font: 16px "Open Sans", "Arial", sans-serif;
    width: 620px;
  }

  details > summary {
    padding: 2px 6px;
    width: 15em;
    background-color: #ddd;
    border: none;
    box-shadow: 3px 3px 4px black;
  }

  details > p {
    border-radius: 0 0 10px 10px;
    background-color: #ddd;
    padding: 2px 6px;
    margin: 0;
    box-shadow: 3px 3px 4px black;
  }
*/

  footer {
    text-align: center;
  }
}

/* responsive.css (または新しいCSSファイル) に追加 */

/* PC表示時は非表示 */
.sp-only {
    display: none;
}

/* スマートフォン表示時（幅が767px以下の場合）は表示 */
@media (max-width: 767px) {
    .sp-only {
        display: inline; /* 改行として機能させる */
    }
}