/* ========================================================
   智能影集与人物画册 - 手机端原生 App 级交互与视觉样式 (v3.0 终极优化版)
   ======================================================== */

/* 默认在桌面端隐藏移动端特有元素 */
.mobile-bottom-nav {
  display: none;
}
.modal-mobile-back-btn {
  display: none;
}
.lightbox-floating-back-btn {
  display: none;
}

@media (max-width: 768px) {
  /* 1. 基础容器与视口调整 */
  body {
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    -webkit-user-select: none;
    background: #f8fafc;
    margin: 0;
    padding: 0;
  }

  .container {
    padding: 0.5rem 0.5rem 5rem 0.5rem !important; /* 预留底部 Tab 空间，两侧贴边规整 */
    width: 100% !important;
    box-sizing: border-box !important;
  }

  /* 2. 顶部 Header 表头精准居中与两侧对齐 */
  .header {
    position: sticky;
    top: 0;
    z-index: 150;
    padding: 0.6rem 0.85rem !important;
    display: flex !important;
    flex-direction: row !important;
    justify-content: space-between !important;
    align-items: center !important;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    background: rgba(255, 255, 255, 0.94) !important;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08) !important;
    box-sizing: border-box !important;
    gap: 0.5rem !important;
    height: 54px !important;
  }

  .header .nav-tabs {
    display: none !important; /* 桌面端 Tab 在手机上由底部 Tab 代替 */
  }

  .brand {
    display: flex !important;
    align-items: center !important;
    gap: 0.5rem !important;
    flex-shrink: 0;
  }
  .brand-icon {
    width: 32px !important;
    height: 32px !important;
    font-size: 1rem !important;
    border-radius: 8px !important;
  }
  .brand-title {
    font-size: 0.96rem !important;
    font-weight: 700 !important;
    letter-spacing: -0.2px;
    line-height: 1.2;
  }
  #topAlbumSub {
    display: none !important; /* 手机端隐藏冗长副标题，保持表头清爽水平对齐 */
  }

  .header-actions {
    display: flex !important;
    align-items: center !important;
    gap: 6px !important;
    flex-wrap: nowrap !important;
    flex-shrink: 0;
  }
  .header-actions .btn {
    padding: 5px 9px !important;
    font-size: 0.75rem !important;
    border-radius: 6px !important;
    margin: 0 !important;
    flex: none !important;
    white-space: nowrap !important;
  }
  #btnTopBatchMode span, 
  #navRemoteBtn span {
    display: none !important;
  }

  /* 3. 手机端各专栏表头（Section Header）完美水平对齐 */
  .album-section-block {
    padding: 1rem 0.5rem !important; /* 彻底去除桌面的 3rem 巨大白边！ */
    border-bottom: 1px solid rgba(0, 0, 0, 0.06) !important;
    box-sizing: border-box !important;
  }

  .album-section-header {
    display: flex !important;
    flex-direction: row !important;
    align-items: center !important;
    justify-content: space-between !important;
    text-align: left !important;
    margin-bottom: 0.75rem !important;
    padding: 0 4px !important;
    gap: 8px !important;
    box-sizing: border-box !important;
  }

  .album-section-title {
    font-size: 1.08rem !important;
    font-weight: 700 !important;
    color: #0f172a !important;
    margin: 0 !important;
    display: flex !important;
    align-items: center !important;
    gap: 6px !important;
    flex: 1 !important;
    white-space: nowrap !important;
  }

  .album-section-desc {
    display: none !important; /* 手机端不占高度，保持两端水平对称 */
  }

  .album-section-meta {
    margin-top: 0 !important;
    display: flex !important;
    align-items: center !important;
    gap: 6px !important;
    flex-shrink: 0 !important;
  }

  .album-section-count {
    font-size: 0.72rem !important;
    padding: 2px 7px !important;
  }

  .album-section-more {
    font-size: 0.75rem !important;
    padding: 3px 8px !important;
  }

  /* 4. “照片图库”顶部分类筛选表头（单行横向丝滑滑块） */
  .filter-bar {
    margin-bottom: 0.6rem !important;
    display: flex !important;
    flex-direction: column !important;
    gap: 0.5rem !important;
    align-items: stretch !important;
  }

  .category-tags {
    display: flex !important;
    flex-wrap: nowrap !important; /* 强制单行，不再上下错位折行！ */
    overflow-x: auto !important;
    -webkit-overflow-scrolling: touch !important;
    padding: 4px 2px !important;
    gap: 6px !important;
    scrollbar-width: none !important;
  }

  .category-tags::-webkit-scrollbar {
    display: none !important;
  }

  .cat-chip {
    flex-shrink: 0 !important; /* 防止胶囊被横向挤扁 */
    white-space: nowrap !important;
    padding: 5px 10px !important;
    font-size: 0.8rem !important;
    border-radius: 16px !important;
  }

  .gallery-sub-banner {
    padding: 0.4rem 0.6rem !important;
    margin-bottom: 0.5rem !important;
  }

  /* 5. 沉浸式灯箱看图【彻底全屏】优化 */
  .lightbox-overlay {
    background: #000000 !important; /* 纯黑背景，剧院级视网膜看图 */
  }

  .lightbox-stage {
    padding: 0 !important;
    width: 100vw !important;
    height: 100dvh !important;
    position: fixed !important;
    inset: 0 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
    overflow: hidden !important;
  }

  .lightbox-img-wrapper {
    width: 100vw !important;
    height: 100dvh !important;
    display: flex !important;
    align-items: center !important;
    justify-content: center !important;
  }

  #lightboxMainImg {
    max-width: 100vw !important;
    max-height: 100dvh !important;
    width: 100% !important;
    height: 100% !important;
    object-fit: contain !important; /* 100% 占满全屏，无边框无白边 */
    border-radius: 0 !important;
    box-shadow: none !important;
    cursor: default !important;
  }

  /* 隐藏遮挡正中央的 52px 左右巨球大箭头（手机端手势滑动切图） */
  .lightbox-nav-btn {
    display: none !important;
  }

  /* 隐藏底部 Filmstrip 缩略图条，释放 100% 视界 */
  .lightbox-filmstrip {
    display: none !important;
  }

  /* 浮动半透明返回按钮 */
  .lightbox-floating-back-btn {
    display: inline-flex !important;
    position: fixed !important;
    top: 12px !important;
    left: 12px !important;
    z-index: 10000 !important;
    background: rgba(0, 0, 0, 0.65) !important;
    border: 1px solid rgba(255, 255, 255, 0.25) !important;
    color: #ffffff !important;
    padding: 6px 14px !important;
    border-radius: 20px !important;
    font-size: 0.85rem !important;
    font-weight: 600 !important;
    align-items: center !important;
    gap: 5px !important;
    backdrop-filter: blur(10px) !important;
    -webkit-backdrop-filter: blur(10px) !important;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.5) !important;
    cursor: pointer !important;
  }

  /* 顶部半透明浮动控制栏（避让左侧返回按钮） */
  .lightbox-topbar {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    padding: 10px 10px 10px 88px !important;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.75) 0%, rgba(0, 0, 0, 0) 100%) !important;
    border-bottom: none !important;
    z-index: 9999 !important;
    display: flex !important;
    justify-content: flex-end !important;
    pointer-events: auto !important;
  }

  .lightbox-title-box {
    display: none !important;
  }

  .lightbox-actions {
    gap: 4px !important;
    flex-wrap: nowrap !important;
  }

  .lightbox-btn {
    padding: 5px 8px !important;
    font-size: 0.72rem !important;
    border-radius: 6px !important;
  }

  /* 6. 模态框全屏原生 App 化 */
  .modal-backdrop {
    padding: 0 !important;
  }

  .modal-content {
    width: 100% !important;
    max-width: 100% !important;
    height: 100% !important;
    max-height: 100% !important;
    border-radius: 0 !important;
    display: flex !important;
    flex-direction: column !important;
    border: none !important;
  }

  .modal-header {
    padding: 0.75rem 1rem !important;
    position: sticky !important;
    top: 0 !important;
    background: #ffffff !important;
    z-index: 50 !important;
    border-bottom: 1px solid #e2e8f0 !important;
    display: flex !important;
    align-items: center !important;
    justify-content: flex-start !important;
    gap: 0.5rem !important;
  }

  .modal-header h3 {
    font-size: 0.98rem !important;
    margin: 0 !important;
    flex: 1 !important;
    text-align: center !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
    padding-right: 2rem !important;
  }

  .modal-mobile-back-btn {
    display: inline-flex !important;
    align-items: center !important;
    gap: 4px !important;
    background: #f1f5f9 !important;
    border: none !important;
    color: #1e293b !important;
    font-size: 0.85rem !important;
    font-weight: 600 !important;
    padding: 6px 12px !important;
    border-radius: 20px !important;
    cursor: pointer !important;
    flex-shrink: 0 !important;
  }

  .modal-close {
    display: none !important;
  }

  .modal-body {
    flex: 1 !important;
    overflow-y: auto !important;
    -webkit-overflow-scrolling: touch !important;
    padding: 0.85rem !important;
  }

  /* 7. 手机端原生底部 Tab 导航栏 */
  .mobile-bottom-nav {
    display: flex !important;
    justify-content: space-around !important;
    align-items: center !important;
    position: fixed !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    height: 54px !important;
    padding-bottom: env(safe-area-inset-bottom, 0px) !important;
    background: rgba(255, 255, 255, 0.96) !important;
    backdrop-filter: blur(16px) !important;
    -webkit-backdrop-filter: blur(16px) !important;
    border-top: 1px solid rgba(0, 0, 0, 0.08) !important;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.05) !important;
    z-index: 1000 !important;
  }

  .mobile-tab-btn {
    flex: 1 !important;
    display: flex !important;
    flex-direction: column !important;
    align-items: center !important;
    justify-content: center !important;
    background: transparent !important;
    border: none !important;
    color: #64748b !important;
    font-size: 0.7rem !important;
    padding: 5px 0 !important;
    gap: 3px !important;
    position: relative !important;
    cursor: pointer !important;
  }

  .mobile-tab-btn i {
    font-size: 1.15rem !important;
  }

  .mobile-tab-btn.active {
    color: #4f46e5 !important;
    font-weight: 700 !important;
  }

  .m-tab-badge {
    position: absolute !important;
    top: 2px !important;
    right: calc(50% - 18px) !important;
    background: #ef4444 !important;
    color: #fff !important;
    font-size: 0.65rem !important;
    padding: 1px 5px !important;
    border-radius: 10px !important;
    font-weight: 700 !important;
    transform: scale(0.85) !important;
  }

  /* 8. 卡片流式 2 列整齐排版 */
  .photos-grid, .photo-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 8px !important;
  }

  .persons-grid {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 10px !important;
  }

  .album-hero-cover {
    height: 320px !important;
    padding: 1.5rem 1rem !important;
  }
  .album-hero-content h1 {
    font-size: 1.45rem !important;
  }
}