/* ============================================================
   本地相册 /tools/photo-album —— class 前缀 pa-
   复刻 immich（自托管照片视频管理）的界面语言：
   毛玻璃顶栏 + 居中胶囊搜索、正方形小圆角瀑布流网格、
   左侧日期分组条 + 年份快速轨道、悬浮 FAB、底部批量操作条、
   全黑沉浸式查看器、Material 风格主色（站点 --accent）。
   全部数据存浏览器 IndexedDB，不上传服务器。
   ============================================================ */
.pa {
    --pa-radius: 6px;
    --pa-radius-lg: 14px;
    --pa-cell-sm: 108px;
    --pa-shadow: 0 6px 24px rgba(0, 0, 0, .14);
    --pa-shadow-lg: 0 10px 36px rgba(0, 0, 0, .18);
    --pa-glass: color-mix(in srgb, var(--bg-primary) 82%, transparent);
    width: 100%;
    box-sizing: border-box;
    display: flex;
    flex-direction: column;
    gap: 0;
    min-height: calc(100vh - 0px);
    color: var(--text-primary);
    background: var(--bg-secondary);
}

/* ===== 顶栏 ===== */
.pa-top {
    position: sticky; top: 0; z-index: 60;
    display: flex; align-items: center; gap: 12px;
    padding: 10px 18px; background: var(--pa-glass);
    backdrop-filter: saturate(1.6) blur(14px); -webkit-backdrop-filter: saturate(1.6) blur(14px);
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}
.pa-brand { display: flex; align-items: center; gap: 9px; font-weight: 800; font-size: 16px; }
.pa-brand-ico {
    width: 32px; height: 32px; border-radius: 10px; display: flex; align-items: center; justify-content: center;
    font-size: 17px; background: var(--accent); color: #fff;
}
.pa-brand-name { white-space: nowrap; }
.pa-brand-meta { font-size: 11.5px; font-weight: 500; color: var(--text-secondary); white-space: nowrap; }

/* 搜索（居中胶囊） */
.pa-search-wrap { position: relative; flex: 1 1 320px; max-width: 560px; display: flex; align-items: center; }
.pa-search {
    width: 100%; padding: 9px 40px 9px 36px; font-size: 14px; font-family: inherit;
    border-radius: 999px; border: 1px solid var(--border-color);
    background: var(--bg-secondary); color: var(--text-primary); box-sizing: border-box;
}
.pa-search:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 18%, transparent); }
.pa-search-ico { position: absolute; left: 12px; font-size: 14px; color: var(--text-secondary); pointer-events: none; }
.pa-search-clear {
    position: absolute; right: 8px; border: 0; background: transparent; color: var(--text-secondary);
    cursor: pointer; font-size: 15px; line-height: 1; padding: 4px 6px; border-radius: 999px; font-family: inherit;
}
.pa-search-clear:hover { color: var(--text-primary); background: color-mix(in srgb, var(--text-primary) 8%, transparent); }

.pa-filter-sel {
    padding: 8px 9px; font-size: 13px; font-family: inherit; border-radius: 10px;
    border: 1px solid var(--border-color); background: var(--bg-primary); color: var(--text-primary);
}
.pa-filter-sel:focus { outline: none; border-color: var(--accent); }

/* 视图切换（Material segmented） */
.pa-seg { display: flex; gap: 2px; padding: 3px; border-radius: 999px; background: color-mix(in srgb, var(--text-primary) 7%, transparent); }
.pa-seg-btn {
    border: 0; background: transparent; color: var(--text-secondary); cursor: pointer;
    font-size: 13px; font-weight: 600; font-family: inherit; padding: 6px 12px; border-radius: 999px;
    display: flex; align-items: center; gap: 5px; white-space: nowrap; transition: all .15s;
}
.pa-seg-btn:hover { color: var(--text-primary); }
.pa-seg-btn.is-on { background: var(--bg-primary); color: var(--accent); box-shadow: 0 1px 3px rgba(0, 0, 0, .12); }
.pa-top-actions { display: flex; align-items: center; gap: 8px; margin-left: auto; }

/* 筛选组合（类型 / 设备 / 标签）：桌面内联，手机端整行横向滚动 */
.pa-filters { display: flex; align-items: center; gap: 8px; flex: 0 0 auto; }

/* ===== 通用按钮 ===== */
.pa-btn {
    padding: 8px 14px; font-size: 13.5px; font-weight: 600; font-family: inherit; border-radius: 10px;
    border: 1px solid var(--border-color); background: var(--bg-primary); color: var(--text-primary);
    cursor: pointer; transition: all .15s; white-space: nowrap;
}
.pa-btn:hover:not(:disabled) { border-color: var(--accent); color: var(--accent); }
.pa-btn:disabled { opacity: .45; cursor: not-allowed; }
.pa-btn-sm { padding: 6px 11px; font-size: 12.5px; border-radius: 999px; }
.pa-btn-go { background: var(--accent); border-color: var(--accent); color: #fff; }
.pa-btn-go:hover:not(:disabled) { color: #fff; filter: brightness(1.08); }
.pa-btn.is-on { background: color-mix(in srgb, var(--accent) 14%, transparent); border-color: var(--accent); color: var(--accent); }
.pa-btn-danger { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 45%, transparent); }
.pa-btn-danger:hover:not(:disabled) { border-color: var(--danger); color: var(--danger); }

/* FAB（悬浮添加按钮） */
.pa-fab {
    position: fixed; right: 22px; bottom: 24px; z-index: 70; width: 56px; height: 56px; border-radius: 50%;
    border: 0; background: var(--accent); color: #fff; font-size: 26px; line-height: 1; cursor: pointer;
    display: flex; align-items: center; justify-content: center; box-shadow: 0 6px 18px color-mix(in srgb, var(--accent) 40%, transparent);
}
.pa-fab:hover { filter: brightness(1.1); }
.pa-fab:active { transform: scale(.96); }

/* ===== 主体 ===== */
.pa-body { flex: 1 1 auto; display: flex; align-items: flex-start; gap: 0; min-height: 0; }

/* 左侧快速轨道（immich scrubber / 年份跳转） */
.pa-rail {
    position: sticky; top: 62px; flex: 0 0 74px; align-self: flex-start;
    padding: 14px 8px 90px; display: flex; flex-direction: column; gap: 3px;
    max-height: calc(100vh - 62px); overflow: auto; z-index: 30;
}
.pa-rail-item {
    border: 0; background: transparent; cursor: pointer; font-family: inherit;
    font-size: 11.5px; font-weight: 700; color: var(--text-secondary); text-align: left;
    padding: 4px 8px; border-radius: 8px; letter-spacing: .2px; position: relative;
}
.pa-rail-item:hover { color: var(--text-primary); background: color-mix(in srgb, var(--text-primary) 7%, transparent); }
.pa-rail-item.is-on { color: var(--accent); }
.pa-rail-item.is-on::before {
    content: ''; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
    width: 3px; height: 16px; border-radius: 2px; background: var(--accent);
}

/* 内容区 */
.pa-main { flex: 1 1 auto; min-width: 0; padding: 12px 16px 120px; }

/* ===== 时间轴分组 ===== */
.pa-group { margin-bottom: 26px; }
.pa-group-head {
    display: flex; align-items: baseline; gap: 10px; margin: 6px 0 10px; padding-left: 2px;
    position: sticky; top: 54px; z-index: 20;
    background: linear-gradient(var(--bg-secondary) 72%, transparent);
    padding-top: 6px; padding-bottom: 4px;
}
.pa-group-title { font-size: 14.5px; font-weight: 800; }
.pa-group-sub { font-size: 12px; color: var(--text-secondary); }

/* 网格：正方形小圆角密排（immich 风格） */
.pa-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(var(--pa-cell, 132px), 1fr)); gap: 5px; }
.pa-cell { position: relative; padding: 0; border: 0; background: color-mix(in srgb, var(--text-primary) 8%, transparent); cursor: pointer; line-height: 0; -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
.pa-cell-inner { display: block; position: relative; width: 100%; padding-top: 100%; overflow: hidden; border-radius: var(--pa-radius); background: color-mix(in srgb, var(--text-primary) 8%, transparent); }
.pa-cell img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity .2s; }
.pa-cell img.is-on { opacity: 1; }
/* 无预览占位图（RAW/不支持解码的格式）：完整显示而非裁切 */
.pa-cell img.is-nopreview { object-fit: contain; }
.pa-cell .pa-cell-inner { transition: transform .18s ease; }
@media (hover: hover) and (pointer: fine) {
    .pa-cell:hover .pa-cell-inner { transform: scale(1.025); z-index: 2; }
    .pa-cell:hover .pa-cell-inner img { filter: brightness(1.07); }
}
/* 横排（胶片条）布局：网格转为单行横向滚动，彻底摆脱“只能竖着单列” */
.pa-main.is-row .pa-grid { display: flex; flex-wrap: nowrap; overflow-x: auto; overflow-y: hidden; gap: 8px; padding-bottom: 10px; scroll-snap-type: x proximity; -webkit-overflow-scrolling: touch; }
.pa-main.is-row .pa-cell { flex: 0 0 auto; width: 220px; height: 152px; scroll-snap-align: start; }
.pa-main.is-row .pa-cell-inner { padding-top: 0; height: 100%; }
.pa-main.is-row .pa-cell img { object-fit: cover; }
/* 设置面板（极简） */
.pa-set-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 11px 2px; border-bottom: 1px solid var(--border-color); }
.pa-set-row:last-of-type { border-bottom: 0; }
.pa-set-k { font-size: 13.5px; font-weight: 700; color: var(--text-primary); flex: 0 0 auto; }
.pa-set-opts { display: flex; gap: 6px; }
.pa-set-opt { border: 1px solid var(--border-color); background: var(--bg-primary); color: var(--text-secondary); border-radius: 999px; padding: 5px 14px; font-size: 12.5px; cursor: pointer; font-family: inherit; line-height: 1.4; }
.pa-set-opt:hover { color: var(--text-primary); }
.pa-set-opt.is-on { background: var(--accent); color: #fff; border-color: var(--accent); }
.pa-set-hint { font-size: 12px; color: var(--text-secondary); margin: 14px 0 0; line-height: 1.6; }
/* 缩略图密度（默认设置） */
.pa-density-sm .pa-grid { grid-template-columns: repeat(auto-fill, minmax(92px, 1fr)); gap: 4px; }
.pa-density-lg .pa-grid { grid-template-columns: repeat(auto-fill, minmax(184px, 1fr)); gap: 6px; }
/* 顶栏齿轮按钮（极简） */
.pa-icon-btn { width: 34px; padding-left: 0; padding-right: 0; text-align: center; font-size: 16px; line-height: 1; }
.pa-cell.is-sel .pa-cell-inner { outline: 3px solid var(--accent); outline-offset: -3px; }
.pa-cell-check {
    position: absolute; left: 6px; top: 6px; z-index: 3; width: 20px; height: 20px; border-radius: 50%;
    background: color-mix(in srgb, #000 42%, transparent); color: #fff; display: flex; align-items: center; justify-content: center;
    font-size: 12px; opacity: 0; transition: opacity .15s; pointer-events: none;
}
.pa-grid.is-sel-mode .pa-cell-check, .pa-cell:hover .pa-cell-check, .pa-cell.is-sel .pa-cell-check { opacity: 1; }
.pa-cell.is-sel .pa-cell-check { background: var(--accent); }
.pa-cell-badges { position: absolute; right: 5px; top: 5px; z-index: 3; display: flex; gap: 3px; }
.pa-badge {
    font-size: 10px; line-height: 1; padding: 3px 5px; border-radius: 5px; font-weight: 700;
    background: color-mix(in srgb, #000 52%, transparent); color: #fff; font-family: inherit;
}
.pa-badge-fav { background: #f5b301; }
.pa-badge-arch { background: #6b7280; }
.pa-badge-vid { background: #7c4dff; }
.pa-badge-raw { background: #00897b; }
.pa-badge-lock { background: #ef6c00; }
.pa-cell-foot {
    position: absolute; left: 0; right: 0; bottom: 0; z-index: 2; padding: 14px 7px 5px;
    background: linear-gradient(transparent, rgba(0, 0, 0, .68)); color: #fff; font-size: 10.5px;
    display: flex; justify-content: space-between; gap: 6px; opacity: 0; transition: opacity .15s; line-height: 1.3;
}
.pa-cell:hover .pa-cell-foot { opacity: 1; }
.pa-cell-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pa-cell-dur { flex: 0 0 auto; font-variant-numeric: tabular-nums; }
.pa-stack-flag {
    position: absolute; right: 5px; bottom: 5px; z-index: 3; font-size: 10px; font-weight: 700;
    background: var(--accent); color: #fff; padding: 2px 6px; border-radius: 999px; cursor: pointer;
}
.pa-stack-flag:hover { filter: brightness(1.18); }
/* 堆叠：隐藏整个单元格（原先只隐藏 inner，网格里会残留空框架） */
.pa-cell.is-stacked { display: none; }
.pa-stack-more { position: absolute; inset: 0; z-index: 2; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 12px; font-weight: 700; }
/* 卡片标题行：标题与右侧按钮/副标题横排（相册/回忆/地图页共用，此前缺失导致按钮换行） */
.pa-card-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; }

/* ===== 空态 / 提示 ===== */
.pa-empty { padding: 60px 20px; text-align: center; color: var(--text-secondary); }
.pa-empty-ico { font-size: 52px; opacity: .5; }
.pa-empty-tx { font-size: 15px; font-weight: 700; margin: 12px 0 6px; color: var(--text-primary); }
.pa-empty-sub { font-size: 13px; line-height: 1.7; }
.pa-note {
    margin: 10px 16px 0; padding: 9px 13px; border-radius: 10px; font-size: 13px; line-height: 1.6;
    border: 1px solid var(--border-color); background: var(--bg-primary); color: var(--text-secondary);
}
.pa-note[hidden] { display: none !important; }
.pa-note.is-err { color: var(--danger); border-color: color-mix(in srgb, var(--danger) 45%, transparent); }
.pa-note.is-ok { color: #15803d; border-color: #86efac; }

/* ===== 相册视图 ===== */
.pa-albums { display: grid; grid-template-columns: repeat(auto-fill, minmax(210px, 1fr)); gap: 14px; }
.pa-album {
    border: 1px solid var(--border-color); background: var(--bg-primary); border-radius: var(--pa-radius-lg);
    overflow: hidden; cursor: pointer; text-align: left; padding: 0; font-family: inherit; color: inherit;
    display: flex; flex-direction: column;
}
.pa-album:hover { border-color: var(--accent); }
.pa-album-cover { display: block; position: relative; width: 100%; padding-top: 62%; background: color-mix(in srgb, var(--text-primary) 9%, transparent); }
.pa-album-cover img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: 0; transition: opacity .2s; }
.pa-album-cover img.is-on { opacity: 1; }
.pa-album-lock { position: absolute; right: 7px; top: 7px; z-index: 2; font-size: 11px; }
.pa-album-info { padding: 9px 11px 11px; display: flex; flex-direction: column; gap: 3px; }
.pa-album-name { font-size: 13.5px; font-weight: 700; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pa-album-meta { font-size: 11.5px; color: var(--text-secondary); }
/* 相册视图同样支持横排（胶片条）：覆盖上面的网格为单行横向滚动 */
.pa-main.is-row .pa-albums { display: flex; flex-wrap: nowrap; overflow-x: auto; overflow-y: hidden; gap: 12px; padding-bottom: 10px; scroll-snap-type: x proximity; -webkit-overflow-scrolling: touch; }
.pa-main.is-row .pa-album { flex: 0 0 auto; width: 220px; }
.pa-main.is-row .pa-album-cover { padding-top: 0; height: 150px; }

/* ===== 统计视图 ===== */
.pa-kpis { display: grid; grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); gap: 10px; margin-bottom: 16px; }
.pa-kpi { background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: var(--pa-radius-lg); padding: 13px 15px; }
.pa-kpi-v { font-size: 21px; font-weight: 800; line-height: 1.2; }
.pa-kpi-k { font-size: 12px; color: var(--text-secondary); margin-top: 3px; }
.pa-panels { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 14px; }
.pa-panel { background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: var(--pa-radius-lg); padding: 14px 16px; }
.pa-panel h3 { margin: 0 0 10px; font-size: 14px; font-weight: 800; }
.pa-bar-row { display: flex; align-items: center; gap: 9px; margin-bottom: 7px; font-size: 12px; }
.pa-bar-label { flex: 0 0 96px; color: var(--text-secondary); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pa-bar-track { flex: 1 1 auto; height: 8px; border-radius: 4px; background: color-mix(in srgb, var(--text-primary) 10%, transparent); overflow: hidden; }
.pa-bar-fill { height: 100%; background: var(--accent); border-radius: 4px; }
.pa-bar-val { flex: 0 0 auto; font-variant-numeric: tabular-nums; color: var(--text-primary); font-weight: 600; min-width: 42px; text-align: right; }
.pa-months { display: flex; align-items: flex-end; gap: 4px; height: 130px; }
.pa-month { flex: 1 1 0; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; gap: 4px; }
.pa-month-bar { width: 100%; max-width: 26px; background: var(--accent); border-radius: 4px 4px 0 0; min-height: 2px; }
.pa-month-lab { font-size: 10px; color: var(--text-secondary); writing-mode: vertical-rl; }

/* ===== 地图视图（自绘网格，无外部底图依赖） ===== */
.pa-map-wrap { background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: var(--pa-radius-lg); padding: 12px; }
.pa-map { width: 100%; height: min(62vh, 520px); display: block; border-radius: var(--pa-radius); background: color-mix(in srgb, var(--text-primary) 5%, transparent); cursor: crosshair; }
.pa-map-hint { font-size: 12px; color: var(--text-secondary); margin-top: 8px; line-height: 1.7; }
.pa-places { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 8px; margin-top: 12px; }
.pa-place { border: 1px solid var(--border-color); border-radius: 10px; padding: 8px 10px; font-size: 12px; background: var(--bg-primary); }
.pa-place b { display: block; font-size: 12.5px; margin-bottom: 2px; }
.pa-place span { color: var(--text-secondary); font-variant-numeric: tabular-nums; }

/* ===== 回忆 / 幻灯片 ===== */
.pa-mem-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 8px; }
.pa-mem-card { position: relative; padding: 0; border: 0; background: transparent; cursor: pointer; line-height: 0; border-radius: var(--pa-radius); overflow: hidden; }
.pa-mem-card img { width: 100%; aspect-ratio: 1; object-fit: cover; opacity: 0; transition: opacity .2s; }
.pa-mem-card img.is-on { opacity: 1; }
.pa-mem-when {
    position: absolute; left: 0; right: 0; bottom: 0; z-index: 2; padding: 16px 8px 6px;
    background: linear-gradient(transparent, rgba(0, 0, 0, .7)); color: #fff; font-size: 11px; font-weight: 600;
    display: flex; justify-content: space-between; gap: 6px;
}

/* ===== 查看器（全黑沉浸式） ===== */
.pa-viewer {
    position: fixed; inset: 0; z-index: 200000; background: #000;
    display: flex; flex-direction: column; animation: pa-fade .18s ease;
}
.pa-viewer[hidden] { display: none !important; }
@keyframes pa-fade { from { opacity: 0; } to { opacity: 1; } }
.pa-v-top {
    position: absolute; top: 0; left: 0; right: 0; z-index: 3; display: flex; align-items: center; gap: 8px;
    padding: 10px 12px; background: linear-gradient(rgba(0, 0, 0, .62), transparent); color: #fff;
}
.pa-v-title { font-size: 13.5px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; flex: 1 1 auto; }
.pa-v-pos { font-size: 12px; font-variant-numeric: tabular-nums; opacity: .8; flex: 0 0 auto; }
.pa-v-btn {
    width: 36px; height: 36px; border-radius: 50%; border: 0; background: rgba(255, 255, 255, .14); color: #fff;
    cursor: pointer; font-size: 15px; display: flex; align-items: center; justify-content: center; flex: 0 0 auto;
    font-family: inherit; line-height: 1;
}
.pa-v-btn:hover { background: rgba(255, 255, 255, .26); }
.pa-v-btn.is-on { background: var(--accent); }
.pa-v-stage { flex: 1 1 auto; position: relative; overflow: hidden; display: flex; align-items: center; justify-content: center; }
.pa-v-img {
    max-width: 100%; max-height: 100%; display: block; user-select: none; -webkit-user-drag: none;
    transition: transform .18s ease; transform-origin: center center; cursor: grab;
}
.pa-v-img.is-drag { cursor: grabbing; }
.pa-v-img.is-pano { max-width: none; max-height: 100%; height: 100%; width: auto; object-fit: cover; }
.pa-v-nav {
    position: absolute; top: 50%; transform: translateY(-50%); z-index: 3; width: 44px; height: 44px;
    border-radius: 50%; border: 0; background: rgba(255, 255, 255, .13); color: #fff; font-size: 19px; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
}
.pa-v-nav:hover { background: rgba(255, 255, 255, .25); }
.pa-v-prev { left: 14px; }
.pa-v-next { right: 14px; }
.pa-v-bottom {
    position: absolute; left: 0; right: 0; bottom: 0; z-index: 3; padding: 16px 14px 12px;
    background: linear-gradient(transparent, rgba(0, 0, 0, .74)); color: #fff; display: flex; flex-direction: column; gap: 8px;
}
.pa-v-prog { display: flex; align-items: center; gap: 9px; font-size: 11.5px; font-variant-numeric: tabular-nums; }
.pa-v-prog-track { flex: 1 1 auto; height: 4px; border-radius: 2px; background: rgba(255, 255, 255, .26); overflow: hidden; }
.pa-v-prog-fill { height: 100%; width: 0; background: var(--accent); }
.pa-v-meta { display: flex; flex-wrap: wrap; gap: 6px 14px; font-size: 12px; color: rgba(255, 255, 255, .9); }
.pa-v-meta span b { font-weight: 700; }
.pa-v-info {
    position: absolute; right: 14px; bottom: 74px; z-index: 4; width: min(300px, 78vw); max-height: 46vh; overflow: auto;
    background: rgba(18, 18, 20, .94); color: #eee; border-radius: 12px; padding: 12px 14px; font-size: 12px; line-height: 1.7;
}
.pa-v-info[hidden] { display: none !important; }
.pa-v-info h4 { margin: 0 0 7px; font-size: 12.5px; }
.pa-v-info table { width: 100%; border-collapse: collapse; }
.pa-v-info td { padding: 2px 0; vertical-align: top; }
.pa-v-info td:first-child { color: rgba(255, 255, 255, .62); width: 40%; padding-right: 8px; }
.pa-v-selbar { display: flex; gap: 8px; align-items: center; }

/* 底部批量操作条 */
.pa-selbar {
    position: fixed; left: 50%; bottom: 22px; transform: translateX(-50%); z-index: 80;
    display: flex; align-items: center; gap: 6px; padding: 8px 10px; border-radius: 999px;
    background: var(--pa-glass); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
    border: 1px solid var(--border-color); box-shadow: var(--pa-shadow); max-width: calc(100vw - 24px);
    flex-wrap: wrap; justify-content: center;
}
.pa-selbar[hidden] { display: none !important; }
.pa-selbar-count { font-size: 13px; font-weight: 700; padding: 0 8px; white-space: nowrap; }
.pa-selbar .pa-btn { border-color: transparent; background: transparent; }
.pa-selbar .pa-btn:hover:not(:disabled) { background: color-mix(in srgb, var(--accent) 12%, transparent); }
.pa-selbar .pa-btn-danger { color: var(--danger); }
.pa-selbar .pa-btn-danger:hover:not(:disabled) { background: color-mix(in srgb, var(--danger) 12%, transparent); }

/* ===== 弹窗 ===== */
.pa-mask {
    position: fixed; inset: 0; z-index: 150000; background: rgba(0, 0, 0, .5);
    display: flex; align-items: center; justify-content: center; padding: 18px;
}
.pa-mask[hidden] { display: none !important; }
.pa-modal {
    background: var(--bg-primary); border-radius: var(--pa-radius-lg); border: 1px solid var(--border-color);
    width: min(460px, 100%); max-height: 86vh; overflow: auto; padding: 18px 20px; box-shadow: var(--pa-shadow);
    display: flex; flex-direction: column; gap: 12px;
}
.pa-modal h3 { margin: 0; font-size: 16px; font-weight: 800; }
.pa-field { display: flex; flex-direction: column; gap: 5px; }
.pa-field label { font-size: 12.5px; font-weight: 600; color: var(--text-secondary); }
.pa-field input[type="text"], .pa-field select {
    padding: 9px 11px; font-size: 14px; font-family: inherit; border-radius: 10px;
    border: 1px solid var(--border-color); background: var(--bg-secondary); color: var(--text-primary); box-sizing: border-box;
}
.pa-field input[type="text"]:focus, .pa-field select:focus { outline: none; border-color: var(--accent); }
.pa-modal-foot { display: flex; gap: 8px; justify-content: flex-end; flex-wrap: wrap; }
.pa-pick-list { display: flex; flex-direction: column; gap: 5px; max-height: 46vh; overflow: auto; }
.pa-pick {
    display: flex; align-items: center; gap: 9px; padding: 8px 10px; border-radius: 10px; cursor: pointer;
    border: 1px solid var(--border-color); background: var(--bg-secondary); font-size: 13px;
}
.pa-pick.is-on { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 12%, transparent); }
.pa-pick img { width: 34px; height: 34px; border-radius: 6px; object-fit: cover; flex: 0 0 auto; background: color-mix(in srgb, var(--text-primary) 10%, transparent); }
.pa-pick-main { flex: 1 1 auto; min-width: 0; }
.pa-pick-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-weight: 600; }
.pa-pick-meta { font-size: 11px; color: var(--text-secondary); }
.pa-chip-row { display: flex; flex-wrap: wrap; gap: 6px; }
.pa-chip {
    display: inline-flex; align-items: center; gap: 5px; padding: 4px 9px; border-radius: 999px; font-size: 12px;
    background: color-mix(in srgb, var(--text-primary) 8%, transparent); color: var(--text-primary);
}
.pa-chip.is-on { background: var(--accent); color: #fff; }
.pa-chip-x { border: 0; background: transparent; color: inherit; cursor: pointer; font-size: 12px; padding: 0; line-height: 1; }

/* 提示气泡 */
.pa-toast {
    position: fixed; left: 50%; bottom: 96px; transform: translateX(-50%); z-index: 300000;
    background: rgba(20, 20, 22, .93); color: #fff; padding: 10px 16px; border-radius: 999px; font-size: 13px;
    box-shadow: var(--pa-shadow); max-width: 86vw; text-align: center;
}
.pa-toast[hidden] { display: none !important; }

/* 导入进度 */
.pa-prog {
    position: fixed; left: 50%; top: 76px; transform: translateX(-50%); z-index: 120000;
    background: var(--pa-glass); backdrop-filter: blur(12px); border: 1px solid var(--border-color);
    border-radius: 999px; padding: 8px 16px; font-size: 13px; box-shadow: var(--pa-shadow); display: flex; align-items: center; gap: 10px;
}
.pa-prog[hidden] { display: none !important; }
.pa-prog-track { width: 130px; height: 6px; border-radius: 3px; background: color-mix(in srgb, var(--text-primary) 12%, transparent); overflow: hidden; }
.pa-prog-fill { height: 100%; width: 0; background: var(--accent); }

/* [hidden] 兜底 */
.pa [hidden] { display: none !important; }

/* ===== 幻灯片（Ken Burns 回忆重现） ===== */
.pa-slide {
    position: fixed; inset: 0; z-index: 220000; background: #000;
    display: flex; align-items: center; justify-content: center;
}
.pa-slide[hidden] { display: none !important; }
.pa-slide img {
    max-width: 100%; max-height: 100%; object-fit: contain; user-select: none; -webkit-user-drag: none;
}
@keyframes pa-kenburns {
    from { transform: scale(1) translate(0, 0); }
    to { transform: scale(1.09) translate(-1.2%, -1%); }
}
.pa-slide-bar {
    position: absolute; left: 0; right: 0; bottom: 0; z-index: 2; padding: 16px 18px 14px;
    background: linear-gradient(transparent, rgba(0, 0, 0, .78)); color: #fff;
    display: flex; align-items: center; gap: 12px; font-size: 13px;
}
.pa-slide-tx { flex: 1 1 auto; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pa-slide-idx { font-variant-numeric: tabular-nums; opacity: .85; }
.pa-slide-close {
    width: 34px; height: 34px; border-radius: 50%; border: 0; background: rgba(255, 255, 255, .16);
    color: #fff; font-size: 16px; cursor: pointer; display: flex; align-items: center; justify-content: center;
    font-family: inherit; flex: 0 0 auto;
}
.pa-slide-close:hover { background: rgba(255, 255, 255, .28); }

/* ===== 拖拽导入提示层 ===== */
.pa-drop {
    position: fixed; inset: 0; z-index: 190000; background: color-mix(in srgb, var(--accent) 16%, transparent);
    display: flex; align-items: center; justify-content: center; pointer-events: none;
}
.pa-drop[hidden] { display: none !important; }
.pa-drop-in {
    background: var(--bg-primary); border: 2px dashed var(--accent); border-radius: 18px;
    padding: 26px 34px; text-align: center; font-size: 16px; font-weight: 800; color: var(--accent);
    box-shadow: var(--pa-shadow);
}
.pa-drop-sub { display: block; font-size: 12.5px; font-weight: 500; color: var(--text-secondary); margin-top: 6px; }
.pa-hint { font-size: 12.5px; color: var(--text-secondary); line-height: 1.7; margin: 0; }

/* 说明区 */
.pa-doc { background: var(--bg-primary); border: 1px solid var(--border-color); border-radius: var(--pa-radius-lg); margin-top: 8px; overflow: hidden; }
/* 极简折叠按钮：summary 充当标题+折叠开关，箭头随展开旋转 */
.pa-doc-sum { list-style: none; cursor: pointer; display: flex; align-items: center; gap: 8px; padding: 14px 18px; font-size: 15px; font-weight: 800; color: var(--text-primary); user-select: none; -webkit-tap-highlight-color: transparent; }
.pa-doc-sum::-webkit-details-marker { display: none; }
.pa-doc-sum:hover { background: var(--bg-secondary); }
.pa-doc-chev { display: inline-flex; font-size: 12px; line-height: 1; color: var(--text-secondary); transition: transform .2s ease; }
.pa-doc[open] .pa-doc-chev { transform: rotate(90deg); }
.pa-doc-body { padding: 0 18px 16px; }
.pa-doc h3 { margin: 14px 0 7px; font-size: 13.5px; font-weight: 800; }
.pa-doc p { margin: 0 0 10px; font-size: 13.5px; line-height: 1.8; color: var(--text-secondary); }
.pa-doc ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 6px; }
.pa-doc li { font-size: 13px; line-height: 1.7; color: var(--text-secondary); }
.pa-doc table { width: 100%; border-collapse: collapse; font-size: 12.5px; }
.pa-doc th, .pa-doc td { text-align: left; padding: 6px 8px; border-bottom: 1px solid var(--border-color); color: var(--text-secondary); }
.pa-doc th { color: var(--text-primary); font-weight: 700; }

/* 超宽屏（≥1600px，如 4K 显示器）：限制主体最大宽度并居中，
   避免照片网格无限铺宽、缩略图过大且页脚信息淹没阅读区 */
@media (min-width: 1600px) {
    .pa-body { max-width: 1680px; margin: 0 auto; }
    .pa-main { padding-left: 24px; padding-right: 24px; }
}

/* ===== 响应式：平板 / 手机 排版与配色微调 ===== */
/* 平板：隐藏左侧年份轨道，网格自适应铺满 */
@media (max-width: 1099px) {
    .pa-rail { display: none; }
    .pa-main { padding: 10px 14px 130px; }
}

/* 手机：顶栏分区、筛选与视图横向滚动、查看器操作换行、批量条横向滚动 */
@media (max-width: 767px) {
    /* 顶栏改为纵向分区：品牌+导入 | 搜索 | 筛选 | 视图 */
    .pa-top { padding: 8px 10px; gap: 8px 10px; align-items: center; row-gap: 8px; }
    .pa-brand { order: 0; flex: 0 0 auto; }
    .pa-brand-name { font-size: 15px; }
    .pa-brand-meta { display: none; }
    .pa-top-actions { order: 1; margin-left: auto; }
    .pa-search-wrap { order: 2; flex: 1 1 100%; max-width: none; }
    .pa-filters { order: 3; flex: 1 1 100%; overflow-x: auto; gap: 7px; scrollbar-width: none; }
    .pa-filters::-webkit-scrollbar { display: none; }
    .pa-filter-sel { flex: 0 0 auto; font-size: 16px; }   /* 16px 防 iOS 聚焦缩放 */
    .pa-seg {
        order: 4; flex: 1 1 100%; width: auto; overflow-x: auto; flex-wrap: nowrap;
        justify-content: flex-start; scrollbar-width: none; -webkit-overflow-scrolling: touch;
    }
    .pa-seg::-webkit-scrollbar { display: none; }
    .pa-seg-btn { flex: 0 0 auto; padding: 7px 12px; font-size: 12.5px; }
    .pa-search, .pa-field input[type="text"], .pa-field select { font-size: 16px; }

    /* 网格更密、缩略图更大更清晰 */
    .pa-grid { grid-template-columns: repeat(auto-fill, minmax(var(--pa-cell-sm), 1fr)); gap: 3px; }
    .pa-cell-foot { display: none; }
    .pa-albums { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 10px; }
    .pa-mem-grid { grid-template-columns: repeat(auto-fill, minmax(var(--pa-cell-sm), 1fr)); gap: 6px; }
    .pa-kpis { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .pa-panels { grid-template-columns: minmax(0, 1fr); }
    .pa-map { height: min(48vh, 420px); }

    /* 查看器：标题独占一行，操作按钮自动换行，信息面板贴底全宽 */
    .pa-v-top { flex-wrap: wrap; gap: 6px; padding: 8px 10px; row-gap: 8px; }
    .pa-v-title { flex: 1 1 100%; order: 0; }
    .pa-v-pos { order: 1; flex: 0 0 auto; }
    .pa-v-btn { width: 34px; height: 34px; font-size: 14px; }
    .pa-v-info {
        right: 8px; left: 8px; width: auto; max-height: 42vh;
        bottom: calc(94px + env(safe-area-inset-bottom));
    }
    .pa-v-bottom { padding: 14px 12px calc(12px + env(safe-area-inset-bottom)); }

    /* 批量操作条：横向滚动，避免换行占两行挡住内容 */
    .pa-selbar {
        bottom: calc(12px + env(safe-area-inset-bottom)); left: 50%;
        gap: 4px; padding: 7px 8px; width: calc(100vw - 20px);
        flex-wrap: nowrap; overflow-x: auto; justify-content: flex-start; scrollbar-width: none;
    }
    .pa-selbar::-webkit-scrollbar { display: none; }
    .pa-selbar .pa-btn { flex: 0 0 auto; padding: 7px 10px; font-size: 12.5px; }
    .pa-selbar-count { flex: 0 0 auto; }

    /* 悬浮按钮与浮层避开底部安全区 */
    .pa-fab { right: 14px; bottom: calc(86px + env(safe-area-inset-bottom)); width: 52px; height: 52px; }
    .pa-prog { top: auto; bottom: calc(76px + env(safe-area-inset-bottom)); }
    .pa-toast { bottom: calc(150px + env(safe-area-inset-bottom)); }
    .pa-modal { border-radius: 16px; max-height: 90vh; }
    .pa-note#paAlbumBar { flex-wrap: wrap; }
}

/* 小屏手机：网格固定 3 列，更紧凑 */
@media (max-width: 480px) {
    .pa-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .pa-mem-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .pa-kpis { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .pa-bar-label { flex-basis: 64px; }
}

@media print { .pa-top, .pa-rail, .pa-fab, .pa-selbar { display: none; } }