@media (max-width: 900px) {
  .case-overview,
  .case-responsive-layout,
  .case-progress-layout {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .scope-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-guide {
    grid-template-columns: 54px 220px 1fr;
    gap: 20px;
  }
}

@media (max-width: 640px) {
  .case-hero {
    padding: 28px 0 68px;
  }

  .breadcrumb {
    margin-bottom: 44px;
    font-size: 11px;
  }

  .case-hero h1 {
    margin-top: 8px;
    font-size: 31px;
    line-height: 1.5;
  }

  .case-status {
    align-items: flex-start;
    border-radius: 12px;
    font-size: 13px;
    line-height: 1.7;
  }

  .case-status span {
    flex: 0 0 auto;
    margin-top: 0.65em;
  }

  .case-lead {
    font-size: 16px;
    line-height: 1.9;
  }

  .case-hero-copy {
    margin-bottom: 34px;
  }

  .browser-bar {
    height: 36px;
    padding: 0 12px;
  }

  .browser-bar > div {
    width: 64%;
    margin-left: 5px;
    font-size: 8px;
  }

  .screen-note {
    text-align: left;
    line-height: 1.8;
  }

  .case-section {
    padding: 72px 0;
  }

  .case-heading h2,
  .responsive-copy h2,
  .case-contact h2 {
    font-size: 28px;
  }

  .case-heading > p:not(.section-label),
  .point-card p,
  .page-guide > p,
  .responsive-copy > p:not(.section-label),
  .case-contact p:not(.section-label) {
    font-size: 15px;
  }

  .case-heading-center {
    margin-bottom: 38px;
    text-align: left;
  }

  .overview-list > div {
    grid-template-columns: 1fr;
    gap: 6px;
  }

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

  .point-card {
    min-height: 0;
    padding: 26px 24px;
  }

  .page-guide-list {
    margin-top: 38px;
  }

  .page-guide {
    grid-template-columns: 42px 1fr;
    gap: 14px;
    padding: 26px 2px;
  }

  .page-guide > p {
    grid-column: 2;
  }

  .case-responsive-layout,
  .case-progress-layout {
    gap: 38px;
  }

  .scope-list {
    gap: 9px;
  }

  .scope-list li {
    min-height: 76px;
    padding: 11px;
    font-size: 12px;
  }

  .case-contact {
    padding: 76px 0;
  }

  .case-contact .btn {
    width: 100%;
  }

  .pc-only {
    display: none;
  }
}