/* 手机 / 平板竖屏（宽度 ≤ 900px） */
@media (max-width: 900px) {
  html {
    height: 100%;
    -webkit-text-size-adjust: 100%;
  }

  body {
    zoom: 1;
    width: 100%;
    height: 100%;
    height: 100dvh;
    padding-bottom: 0;
    overflow: hidden;
  }

  /* 解除桌面 z-index:2 层叠，否则侧栏会被 body 级遮罩盖住且无法点击 */
  .app-chrome {
    flex-direction: column;
    z-index: auto;
  }

  .mobile-only {
    display: flex !important;
  }

  .desktop-only {
    display: none !important;
  }

  .mobile-drawer-overlay {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 4500;
    background: rgba(0, 0, 0, 0.52);
    /* 不用 blur，避免侧栏菜单文字发糊、误触 */
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    pointer-events: auto;
    touch-action: manipulation;
  }

  body.mobile-nav-open .mobile-drawer-overlay,
  body.mobile-groups-open .mobile-drawer-overlay {
    display: block;
  }

  .app-nav {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: min(288px, 88vw);
    z-index: 4600;
    transform: translateX(-105%);
    transition: transform 0.28s var(--ease-out);
    padding-top: max(12px, env(safe-area-inset-top));
    padding-bottom: env(safe-area-inset-bottom);
    pointer-events: auto;
    -webkit-overflow-scrolling: touch;
    overflow-y: auto;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.35);
  }

  body.mobile-nav-open .app-nav {
    transform: translateX(0);
  }

  body.app-nav-collapsed .app-nav {
    width: min(288px, 88vw);
  }

  .app-nav-collapse-btn {
    display: none;
  }

  .sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: min(288px, 88vw);
    z-index: 4600;
    transform: translateX(-105%);
    transition: transform 0.28s var(--ease-out);
    padding-top: max(16px, env(safe-area-inset-top));
    padding-bottom: env(safe-area-inset-bottom);
    pointer-events: auto;
    -webkit-overflow-scrolling: touch;
    overflow-y: auto;
    box-shadow: 4px 0 24px rgba(0, 0, 0, 0.35);
  }

  body.mobile-groups-open .sidebar {
    transform: translateX(0);
  }

  .app-main {
    flex: 1;
    min-height: 0;
    width: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }

  .app-page-warehouse.active {
    flex: 1;
    flex-direction: column;
    min-height: 0;
    width: 100%;
  }

  .app-page-warehouse.active .sidebar {
    display: none;
  }

  .app-page-warehouse.active .main-content {
    flex: 1;
    min-width: 0;
    min-height: 0;
    width: 100%;
  }

  .main-header {
    flex-wrap: wrap;
    align-items: flex-start;
    height: auto;
    min-height: var(--toolbar-h);
    padding: 8px 10px;
    gap: 8px;
  }

  .main-header h3 {
    order: 1;
    flex: 1 1 calc(100% - 96px);
    min-width: 0;
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin: 0;
    line-height: 40px;
  }

  .main-header > .mobile-header-btn {
    order: 0;
    flex-shrink: 0;
  }

  .header-actions {
    order: 2;
    flex: 1 1 100%;
    width: 100%;
    min-width: 0;
  }

  .toolbar-cluster.column-toggle,
  .toolbar-cluster .view-toggle,
  #globalViewBtn,
  #ocrBtn {
    display: none !important;
  }

  .toolbar-row {
    flex-wrap: wrap;
    gap: 8px;
    width: 100%;
    justify-content: stretch;
  }

  .toolbar-cluster-grow {
    flex: 1 1 100%;
    order: 1;
    min-width: 0;
  }

  .toolbar-cluster-grow .search-box {
    flex: 1;
    min-width: 0;
  }

  .search-box input {
    min-width: 0;
    width: 100%;
    font-size: 16px;
  }

  .toolbar-row > .toolbar-cluster:last-child {
    flex: 1 1 100%;
    order: 2;
    justify-content: flex-end;
    gap: 8px;
  }

  .toolbar-row > .toolbar-cluster:last-child .btn-primary {
    display: none;
  }

  .toolbar-select {
    font-size: 14px;
    max-width: 42%;
  }

  .cards-container {
    padding: 12px 10px calc(80px + env(safe-area-inset-bottom)) !important;
  }

  :root {
    --card-columns: 2;
    --toolbar-h: 52px;
  }

  .edit-panel {
    position: fixed;
    inset: 0;
    width: 100% !important;
    max-width: 100%;
    min-width: 0;
    z-index: 5000;
    border-left: none;
    padding-top: env(safe-area-inset-top);
    padding-bottom: 0;
    pointer-events: auto;
  }

  .edit-panel.hidden {
    width: 100% !important;
    transform: translateX(100%);
    opacity: 0;
    pointer-events: none;
  }

  .edit-panel:not(.hidden) {
    transform: translateX(0);
    opacity: 1;
  }

  .edit-panel .panel-body {
    padding-bottom: 8px;
  }

  .edit-panel .panel-footer {
    position: sticky;
    bottom: 0;
    z-index: 3;
    padding: 12px 14px calc(12px + env(safe-area-inset-bottom));
    background: var(--bg-elevated);
    box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.2);
  }

  .edit-panel .btn-footer-save {
    min-height: 48px;
  }

  body.panel-open .mobile-bottom-nav,
  body.panel-open .fab-new {
    display: none !important;
  }

  .fab-new {
    bottom: calc(72px + env(safe-area-inset-bottom));
    right: 16px;
    width: 52px;
    height: 52px;
    font-size: 26px;
    z-index: 370;
  }

  .toast {
    bottom: calc(76px + env(safe-area-inset-bottom));
    max-width: calc(100vw - 32px);
    text-align: center;
  }

  .mobile-header-btn {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    align-items: center;
    justify-content: center;
    padding: 0;
  }

  .auth-overlay,
  .settings-overlay,
  .subscribe-overlay,
  .modal-overlay {
    z-index: 5100;
  }

  .mobile-bottom-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 4000;
    display: flex;
    align-items: stretch;
    justify-content: space-around;
    gap: 4px;
    padding: 6px 8px calc(6px + env(safe-area-inset-bottom));
    background: rgba(18, 18, 18, 0.94);
    border-top: 1px solid var(--border);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
  }

  .mobile-tab {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    min-height: 48px;
    padding: 4px 6px;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-muted);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
  }

  .mobile-tab svg {
    width: 22px;
    height: 22px;
  }

  .mobile-tab.active,
  .mobile-tab:active {
    color: var(--text-primary);
    background: var(--accent-bg);
  }

  .auth-box,
  .settings-panel,
  .custom-modal {
    max-height: 85dvh;
    margin: 16px;
  }

  .floating-prompt {
    max-width: calc(100vw - 24px);
    right: 12px !important;
    left: 12px !important;
    width: auto !important;
  }

  .tag-sheet-panel {
    max-height: 70dvh;
  }

  body.panel-open {
    overflow: hidden;
  }

  /* ---------- 功能页（社区 / 创作 / 生图） ---------- */
  .app-page-feature {
    display: none;
    flex: 1;
    flex-direction: column;
    min-height: 0;
    width: 100%;
  }

  .app-page-feature.active {
    display: flex;
  }

  .feature-shell {
    flex: 1;
    min-height: 0;
    overflow: hidden;
  }

  .feature-header {
    padding: 10px 12px;
    padding-top: max(10px, env(safe-area-inset-top));
    gap: 8px;
    flex-wrap: wrap;
  }

  .feature-header-imagegen h2 {
    flex: 1;
    min-width: 0;
    font-size: 16px;
  }

  .imagegen-mobile-segments {
    display: flex;
    width: 100%;
    order: 3;
    gap: 6px;
    padding: 2px 0 0;
  }

  .imagegen-mobile-seg {
    flex: 1;
    min-height: 40px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
  }

  .imagegen-mobile-seg.active {
    color: var(--text-primary);
    border-color: var(--accent);
    background: var(--accent-bg);
  }

  .imagegen-ref-hint-desktop {
    display: none;
  }

  .imagegen-ref-hint-mobile {
    display: block;
  }

  .imagegen-layout {
    display: flex;
    flex-direction: column;
    flex: 1;
    min-height: 0;
    overflow: hidden;
  }

  body.imagegen-mobile-view-form .imagegen-side {
    display: none;
  }

  body.imagegen-mobile-view-feed .imagegen-form {
    display: none;
  }

  body.imagegen-mobile-view-feed .imagegen-side {
    display: flex;
    flex: 1;
    min-height: 0;
    border-left: none;
  }

  .imagegen-form {
    flex: 1;
    min-height: 0;
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    border-right: none;
    padding: 14px 14px calc(88px + env(safe-area-inset-bottom));
  }

  body.imagegen-mobile-view-form .imagegen-form {
    display: block;
  }

  .imagegen-form select,
  .imagegen-form textarea,
  .imagegen-form .settings-input {
    font-size: 16px;
  }

  .imagegen-params-row {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .imagegen-credits-top {
    flex-wrap: wrap;
    gap: 8px;
  }

  .imagegen-credits-label {
    width: 100%;
    font-size: 13px;
  }

  .imagegen-credits-note {
    display: none;
  }

  .imagegen-publish-row .panel-hint {
    display: none;
  }

  .imagegen-form-actions {
    position: sticky;
    bottom: 0;
    margin: 16px -14px 0;
    padding: 12px 14px calc(72px + env(safe-area-inset-bottom));
    background: linear-gradient(
      to top,
      var(--bg-secondary) 70%,
      color-mix(in srgb, var(--bg-secondary) 92%, transparent)
    );
    border-top: 1px solid var(--border);
    z-index: 2;
  }

  body.imagegen-mobile-view-form .imagegen-form {
    padding-bottom: 0;
  }

  .imagegen-generate-btn {
    min-height: 48px;
    font-size: 15px;
    font-weight: 600;
  }

  .imagegen-side {
    border-left: none;
    min-height: 0;
    flex: 1;
  }

  .imagegen-feed.imagegen-feed--tiles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    padding-bottom: calc(16px + env(safe-area-inset-bottom));
  }

  .imagegen-feed-tab {
    min-height: 44px;
    padding: 12px 8px;
  }

  .imagegen-ref-thumb {
    width: 64px;
    height: 64px;
  }

  .imagegen-ref-rm {
    width: 28px;
    height: 28px;
    font-size: 16px;
  }

  .subscribe-overlay.active .subscribe-panel,
  .auth-overlay.active .auth-box {
    width: calc(100vw - 24px);
    max-width: none;
  }

  .community-detail.user-profile-panel {
    width: 100%;
    max-width: 100%;
    height: 100dvh;
    max-height: 100dvh;
    border-radius: 0;
  }
}

@media (min-width: 901px) {
  .mobile-only {
    display: none !important;
  }

  .mobile-drawer-overlay {
    display: none !important;
  }

  .mobile-bottom-nav {
    display: none !important;
  }

  .imagegen-ref-hint-desktop {
    display: block;
  }

  .imagegen-ref-hint-mobile {
    display: none;
  }
}