/* 4つの操作ボタンで8枚の液晶画面をセット切り替え */
.operation-feature { background: #fff; color: #404040; }
.operation-inner { width: 100%; max-width: 1440px; margin-inline: auto; padding: 56px 24px 64px; }
.operation-title { margin: 0; text-align: center; font-size: clamp(28px, 3.61vw, 52px); font-weight: 700; line-height: 1.5; }
.operation-lead { margin: 40px auto 0; text-align: center; font-size: 22px; line-height: 1.82; }
.operation-device { max-width: 1100px; margin: 32px auto 0; }
.operation-tabs { position: relative; height: 44px; }
.operation-tab { position: absolute; top: 0; transform: translateX(-50%); min-height: 44px; padding: 0 8px; border: none; background: transparent; color: #180e08; font: inherit; font-size: 12px; white-space: nowrap; cursor: pointer; isolation: isolate; }
.operation-tab::before { content: ''; position: absolute; inset: 10px 0; border: 1px solid #827a74; border-radius: 999px; background: #fff; z-index: -1; }
.operation-tab[aria-selected="true"] { color: #fff; }
.operation-tab[aria-selected="true"]::before { background: #180e08; border-color: #180e08; }
.operation-tab:nth-child(1) { left: 21.181818%; }
.operation-tab:nth-child(2) { left: 33.181818%; }
.operation-tab:nth-child(3) { left: 46.909091%; }
.operation-tab:nth-child(4) { left: 61.545455%; }
.operation-tab:focus-visible, .operation-panel:focus-visible { outline: 2px solid #003b85; outline-offset: 3px; }
.operation-photo { position: relative; aspect-ratio: 1100 / 450; overflow: hidden; }
.operation-photo img { display:block; width:100%; height:auto; }
.operation-panel { max-width: 1100px; margin: 96px auto 0; }
.operation-panel[hidden] { display: none; }
.operation-screens { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 38px 58px; margin: 0; padding: 0; list-style: none; }
.operation-screens li { min-width: 0; }
.operation-screen { width: 100%; }
.operation-screen img { display: block; width: 100%; height: auto; }
@media (max-width: 1000px) {
  .operation-tabs { display: grid; grid-template-columns: repeat(4,minmax(0,1fr)); gap: 8px; height: auto; }
  .operation-tab { position: relative; left: auto !important; top: auto; transform: none; white-space: normal; }
  .operation-screens { gap: 24px; }
}
@media (max-width: 767px) {
  .operation-inner { padding: 48px 20px; }
  .operation-title { font-size: 28px; }
  .operation-lead { margin-top: 24px; text-align: left; font-size: 16px; line-height: 1.9; }
  .operation-pc-break { display: none; }
  .operation-tabs { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 8px 12px; margin-bottom: 16px; }
  .operation-tab { font-size: 12px; }
  .operation-tab::before { inset-block: 0; }
  .operation-panel { margin-top: 32px; }
  .operation-screens { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 20px 16px; }
}