/* V2 站内二级及更深页面 Compact 字号与节奏候选；不作为正式 Token。 */
@media (max-width: 820px) {
  body[data-page-level="secondary"] :is(
    .detail-title,
    .page-heading h1,
    .detail-heading h1,
    .detail-heading__title-row h1,
    .thread-heading h1,
    .negotiation-heading h1,
    .title-row h1
  ) {
    font-size: 24px;
    line-height: 1.32;
    letter-spacing: -.016em;
  }

  body[data-page-level="secondary"] :is(
    .detail-section h2,
    .section-heading h2,
    .section-heading-plain h2
  ) {
    font-size: 17px;
    line-height: 1.4;
  }

  body[data-page-level="secondary"] :is(.back-link, .detail-back) {
    min-height: 44px;
  }

  body[data-page-level="secondary"] :is(input, textarea, select) {
    font-size: 16px;
  }

  body[data-page-level="secondary"] .account-page {
    padding-top: max(16px, env(safe-area-inset-top));
  }

  body[data-page-level="secondary"] .detail-header {
    margin-bottom: 24px;
  }

  body[data-page-level="secondary"] .detail-form {
    gap: 28px;
  }

  body[data-page-level="secondary"] .detail-section__heading {
    margin-bottom: 12px;
  }

  body[data-page-level="secondary"] .preference-page {
    padding-top: max(16px, env(safe-area-inset-top));
  }

  body[data-page-level="secondary"] .preference-page .page-heading {
    margin-top: 14px;
  }

  body[data-page-level="secondary"] .preference-form {
    margin-top: 24px;
    gap: 28px;
  }

  body[data-page-level="secondary"] .detail-page {
    padding-top: max(16px, env(safe-area-inset-top));
  }

  body[data-page-level="secondary"] .detail-page .detail-layout {
    margin-top: 14px;
    gap: 20px;
  }

  body[data-page-level="secondary"] .detail-page .detail-summary {
    margin-top: 18px;
    font-size: 15px;
  }

  body[data-page-level="secondary"] .detail-page .detail-facts {
    margin-top: 22px;
  }

  body[data-page-level="secondary"] .detail-page .detail-section {
    margin-top: 24px;
  }

  body[data-page-level="secondary"] .requirement-detail {
    padding-top: max(12px, env(safe-area-inset-top));
  }

  body[data-page-level="secondary"] .requirement-detail .detail-heading {
    margin-bottom: 18px;
  }

  body[data-page-level="secondary"] .requirement-panel {
    padding: 18px 16px 22px;
  }

  body[data-page-level="secondary"] .requirement-panel__section + .requirement-panel__section {
    margin-top: 30px;
  }

  body[data-page-level="secondary"] .negotiation-page {
    padding-top: max(12px, env(safe-area-inset-top));
  }

  body[data-page-level="secondary"] .negotiation-heading {
    margin-bottom: 16px;
  }

  body[data-page-level="secondary"] .negotiation-heading h1 {
    margin-top: 8px;
  }

  body[data-page-level="secondary"] .negotiation-layout {
    gap: 16px;
  }

  body[data-page-level="secondary"] .thread-heading__main {
    margin-top: 12px;
  }

  body[data-page-level="secondary"] .workspace {
    height: 100dvh;
    padding-top: max(12px, env(safe-area-inset-top));
  }

  body[data-page-level="secondary"] .title-row {
    margin-top: 12px;
  }

  body[data-page-level="secondary"] .conversation-region {
    margin-top: 14px;
  }

  body[data-page-level="secondary"] .text-composer textarea {
    font-size: 16px;
  }

  body[data-page-level="secondary"] .settings-section {
    margin-top: 28px;
  }

  body[data-page-level="secondary"] .settings-section--account {
    margin-top: 32px;
  }

  body[data-page-level="secondary"] .settings-surface {
    margin-top: 12px;
  }

  body[data-page-level="secondary"] .settings-row {
    min-height: 64px;
  }

  body[data-page-level="secondary"] .policy-document {
    padding: 18px 16px;
  }

  body[data-page-level="secondary"] .policy-document h2 {
    margin-top: 20px;
  }

  body[data-page-level="secondary"] .policy-document p {
    font-size: 14px;
    line-height: 1.7;
  }
}

@media (max-width: 520px) {
  body[data-page-level="secondary"] :is(
    .detail-title,
    .page-heading h1,
    .detail-heading h1,
    .detail-heading__title-row h1,
    .thread-heading h1,
    .negotiation-heading h1,
    .title-row h1
  ) {
    font-size: 24px;
  }
}