@media (max-width: 768px) {
  :root {
    --header-height: var(--header-height-sp);
  }

  /* ---- base ----- */
  .br-sp {
    display: initial;
  }

  .br-pc {
    display: none;
  }

  .list-style-sp {
    display: initial;
  }

  .section-header {
    margin-bottom: 40px;
  }

  /* ----- header ----- */
  .site-header {
    z-index: 1000;
  }

  .site-header-wrapper {
    position: relative;
    padding: 10px 14px;
    z-index: 30;
  }

  .site-logo {
    max-width: 112px;
    flex-shrink: 0;
    position: relative;
    z-index: 40;
  }

  .site-header-left {
    position: relative;
    z-index: 40;
    width: auto;
  }

  .site-header-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 10px;
    width: auto;
  }

  .site-header-actions {
    gap: 8px;
    position: relative;
    z-index: 40;
  }

  .cta-btn--header {
    padding: 6px 10px;
    border-width: 2px;
    font-size: 12px;
    gap: 6px;
    line-height: 1;
  }

  .cta-btn--header .cta-btn__icon {
    width: 12px;
  }

  /* ハンバーガー */
  .menu-toggle {
    display: block;
    width: 29px;
    height: 29px;
    padding: 0;
    border: 0;
    background: transparent;
    position: relative;
    cursor: pointer;
  }

  .menu-toggle span {
    width: 18px;
    height: 2px;
    position: absolute;
    left: 5px;
    background: var(--color-white);
    transition:
      top 0.28s ease,
      transform 0.28s ease,
      opacity 0.2s ease;
  }

  .line-top {
    top: 5px;
  }

  .line-middle {
    top: 10px;
  }

  .line-bottom {
    top: 15px;
  }

  .menu-toggle.active .line-top {
    top: 12px;
    transform: rotate(45deg);
  }

  .menu-toggle.active .line-middle {
    opacity: 0;
  }

  .menu-toggle.active .line-bottom {
    top: 12px;
    transform: rotate(-45deg);
  }

  /* 右から出るメニュー本体 */
  .site-nav {
    display: block;
    position: fixed;
    top: 0;
    right: 0;
    width: 100vw;
    height: 100vh;
    padding: 72px 18px 24px;
    background: var(--color-navy);
    transform: translateX(100%);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transition:
      transform 0.32s ease,
      opacity 0.28s ease,
      visibility 0.28s ease;
    z-index: 35;
    overflow-y: auto;
  }

  .site-nav.is-animating {
    transition:
      transform 0.32s ease,
      opacity 0.28s ease,
      visibility 0s linear 0.32s;
  }

  .site-nav.active {
    transform: translateX(0);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
  }

  .site-nav-list {
    display: block;
    border-top: 1px solid rgba(255, 255, 255, 0.28);
  }

  .site-nav-list li {
    border-bottom: 1px solid rgba(255, 255, 255, 0.28);
  }

  .site-nav-link {
    display: block;
    padding: 16px 0;
    color: var(--color-white);
    font-size: 14px;
    line-height: 1.4;
    white-space: normal;
  }

  .site-nav-link-top {
    margin-right: 5px;
  }

  .site-nav-supply {
    text-align: left;
  }

  body.menu-open {
    overflow: hidden;
  }

  /*----- hero ----- */
  .hero-title {
    font-size: clamp(18px, 5vw, 30px);
    line-height: 1.1;
  }

  .hero-brand {
    font-size: clamp(30px, 4vw, 70px);
  }

  .hero-content {
    top: 2%;
    left: 2%;
  }

  /* ----- section common ----- */
  .capabilities,
  .categories,
  .supply,
  .contact {
    padding: var(--section-padding-y-sp) 0;
  }

  .capabilities-grid {
    margin: 0;
  }

  .capabilities-content {
    margin: 0 20px;
  }

  /* ----- capabilities ----- */
  .capabilities {
    max-width: 540px;
    margin: 0 auto;
  }

  .capabilities-grid {
    display: block;
  }

  .capabilities-grid .feature-card {
    margin-bottom: 30px;
  }

  .capabilities .feature-card p {
    font-size: 16px;
  }

  /* ----- categories ----- */
  .categories-content {
    max-width: 500px;
    margin: 0 auto;
  }

  .categories-content,
  .categories-top,
  .categories-bottom {
    display: block;
  }

  .process-grid {
    grid-template-columns: 1fr;
  }

  .category-card,
  .process-card {
    margin-bottom: 30px;
  }

  .process-card {
    max-width: 315px;
    margin: 0 auto;
    border: 2px solid #0548AC;
  }

  .process-card img {
    max-height: 300px;
    aspect-ratio: 4 / 3;
  }

  .category-card-body {
    grid-template-columns: 1fr;
    padding: 14px 14px 16px;
    gap: 12px;
  }

  .category-card-body p {
    order: 2;
    line-height: 2;
  }

  .category-card-body img {
    order: 1;
    max-height: 350px;
    object-fit: cover;
  }

  /* ----- panel title ----- */
  .panel-title {
    padding: var(--card-title-padding-sp);
  }

  /* ----- supply ----- */
  .supply-content {
    gap: 16px;
    max-width: 540px;
  }

  .supply-panel-body {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 14px;
  }

  .supply-panel-text {
    font-size: 13px;
    line-height: 1.8;
  }

  .supply-panel-body--intro {
    min-height: 400px;
    padding: 18px 14px;
    display: flex;
    align-items: flex-end;
    background-size: cover;
    background-position: right;
    position: relative;
  }

  .supply-panel-body--intro::before {
    content: '';
    display: block;
    background: var(--color-navy);
    opacity: .6;
    position: absolute;
    top: 0;
    left: 0;
    z-index: 0;
    width: 100%;
    height: 100%;
  }

  .supply-panel-body--intro p {
    max-width: 100%;
    font-size: 18px;
    z-index: 1;
  }

  /* ----- cooperation ----- */
  .cooperation-grid {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }

  .cooperation .feature-card:not(.feature-card-wide) {
    min-height: initial;
  }

  .cooperation-platforms {
    margin: 16px 0 12px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: center;
    gap: 12px 10px;
  }

  .cooperation-platform-logo {
    height: 24px;
  }

  /* ----- banner ----- */
  .banner {
    padding: 20px 40px;
    margin-top: 40px;
  }

  .banner-logo {
    width: var(--banner-logo-width-sp);
  }

  .banner-top {
    display: block;
  }

  /* ----- contact ----- */
  .contact {
    padding-bottom: 90px;
  }

  .contact-content {
    grid-template-columns: 1fr;
    max-width: 500px;
    margin: 0 auto;
  }

  /* ----- cta ----- */
  .cta-btn--contact {
    padding: 10px 0px;
  }

  .cta-btn--contact .cta-btn__icon {
    width: 20px;
  }

  .cta-btn--contact .cta-btn__text {
    font-size: 20px;
  }
}