/* ============================
   Packs Page Layout - 左右分栏
   左侧边栏 : 右侧内容 ≈ 1 : 9
   ============================ */
.packs-layout {
  display: flex;
  max-width: var(--page-max-wide);
  margin: 0 auto;
  min-height: calc(100vh - var(--navbar-height));
}

.packs-sidebar {
  width: 180px;
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  position: sticky;
  top: var(--navbar-height);
  height: calc(100vh - var(--navbar-height));
  overflow-y: auto;
  padding: 20px 0;
}

.packs-sidebar-section {
  padding: 0 12px;
  margin-bottom: 20px;
}

.packs-sidebar-section .sidebar-heading {
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-muted);
  margin-bottom: 8px;
  font-weight: 600;
  padding: 0 8px;
}

/* 侧边栏导航项 */
.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: .88rem;
  cursor: pointer;
  transition: all var(--transition);
  user-select: none;
}

.sidebar-nav-item:hover {
  background: var(--bg-hover);
  color: var(--text);
}

.sidebar-nav-item.active {
  background: var(--bg-elevated);
  color: var(--accent);
  font-weight: 600;
}

.sidebar-nav-item .nav-icon {
  font-size: 1rem;
  width: 18px;
  text-align: center;
}

.sidebar-nav-item .nav-count {
  margin-left: auto;
  font-size: .75rem;
  color: var(--text-muted);
}

/* 侧边栏内的筛选 chips (搜索视图下) */
.sidebar-filters {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.sidebar-filters .filter-block h4 {
  font-size: .72rem;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--text-muted);
  margin-bottom: 6px;
  font-weight: 600;
}

.filter-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.chip {
  padding: 3px 10px;
  border-radius: 20px;
  font-size: .8rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

.chip:hover {
  border-color: var(--accent);
  color: var(--text);
}

.chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.chip .count {
  margin-left: 4px;
  font-size: .75rem;
  opacity: .7;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}

.tag-chip {
  padding: 2px 8px;
  border-radius: 4px;
  font-size: .75rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-muted);
  cursor: pointer;
  transition: all var(--transition);
}

.tag-chip:hover {
  background: var(--bg-hover);
  color: var(--text);
  border-color: var(--text-muted);
}

.tag-chip.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

/* ============================
   右侧主内容区
   ============================ */
.packs-main {
  flex: 1;
  min-width: 0;
  padding: 20px 24px;
}

/* 视图容器 */
.pack-view { display: none; }
.pack-view.active { display: block; }

/* ============================
   搜索视图 - Controls
   ============================ */
.controls {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 16px;
}

.search-box {
  display: flex;
  align-items: center;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0 12px;
  transition: border-color var(--transition);
}

.search-box:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(88,166,255,.15);
}

.search-icon {
  color: var(--text-muted);
  font-size: .9rem;
  margin-right: 8px;
  flex-shrink: 0;
}

.search-box input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text);
  font-size: .9rem;
  padding: 10px 0;
  font-family: var(--font);
}

.search-box input::placeholder {
  color: var(--text-muted);
}

.control-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
}

.sort-group, .filter-group {
  display: flex;
  align-items: center;
  gap: 6px;
}

.sort-group label, .filter-group label {
  font-size: .8rem;
  color: var(--text-secondary);
  white-space: nowrap;
  font-weight: 500;
}

.sort-group select, .filter-group select {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 6px 10px;
  border-radius: var(--radius-xs);
  font-size: .8rem;
  outline: none;
  cursor: pointer;
  font-family: var(--font);
}

.sort-group select:focus, .filter-group select:focus {
  border-color: var(--accent);
}

.range-row {
  display: flex;
  align-items: center;
  gap: 4px;
}

.range-input {
  width: 64px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 5px 8px;
  border-radius: var(--radius-xs);
  font-size: .8rem;
  outline: none;
  font-family: var(--font);
}

.range-input:focus {
  border-color: var(--accent);
}

.range-input::placeholder {
  color: var(--text-muted);
}

/* Active Filters */
.active-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  min-height: 0;
}

.filter-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 2px 10px;
  border-radius: 20px;
  font-size: .78rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  color: var(--text-secondary);
}

.filter-tag .remove {
  cursor: pointer;
  opacity: .6;
  font-size: .85rem;
}

.filter-tag .remove:hover {
  opacity: 1;
  color: var(--accent-red);
}

/* ============================
   Results Bar
   ============================ */
.results-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 4px;
  font-size: .85rem;
  color: var(--text-secondary);
}

.view-toggle {
  cursor: pointer;
  font-size: 1.1rem;
  padding: 4px 8px;
  border-radius: var(--radius-xs);
  transition: background var(--transition);
}

.view-toggle:hover {
  background: var(--bg-hover);
}

/* ============================
   Pack Grid
   ============================ */
.pack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 12px;
  transition: all var(--transition);
}

.pack-grid.list-view {
  grid-template-columns: 1fr;
}

/* Pack Card */
.pack-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  cursor: pointer;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.pack-card:hover {
  border-color: var(--text-muted);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.pack-card .banner-wrap {
  width: 100%;
  height: 80px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-elevated);
  margin-bottom: 12px;
  position: relative;
}

.pack-card .banner-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.pack-card .banner-wrap .banner-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 1.5rem;
  background: linear-gradient(135deg, var(--bg-elevated), var(--bg-hover));
}

.pack-card .card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 8px;
}

.pack-card .pack-name {
  font-weight: 600;
  font-size: .95rem;
  line-height: 1.4;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.pack-card .fav-btn {
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
  color: var(--text-muted);
  padding: 2px;
  transition: color var(--transition);
  flex-shrink: 0;
}

.pack-card .fav-btn.faved {
  color: var(--accent-orange);
}

.pack-card .card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 12px;
  font-size: .8rem;
  color: var(--text-secondary);
  margin-bottom: 8px;
}

.pack-card .card-meta span {
  display: flex;
  align-items: center;
  gap: 3px;
}

.pack-card .card-meta .meta-icon {
  font-size: .75rem;
}

.pack-card .card-eval {
  font-size: .8rem;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 8px;
  line-height: 1.5;
}

.pack-card .card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: auto;
}

.pack-card .card-tag {
  font-size: .7rem;
  padding: 1px 6px;
  border-radius: 3px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-light);
  color: var(--text-muted);
}

.pack-card .card-msd-bar {
  margin-top: 10px;
}

.pack-card .card-msd-bar .msd-labels {
  display: flex;
  gap: 1px;
  margin-bottom: 2px;
}

.pack-card .card-msd-bar .msd-label {
  font-size: 0.55rem;
  color: var(--text-muted);
  text-align: center;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.pack-card .card-msd-bar .msd-label.hidden {
  color: transparent;
}

.pack-card .card-msd-bar .msd-segs {
  display: flex;
  height: 4px;
  border-radius: 2px;
  overflow: hidden;
  gap: 2px;
}

.pack-card .card-msd-bar .seg {
  flex: 1;
  border-radius: 2px;
  opacity: .6;
}

/* List view card */
.pack-grid.list-view .pack-card {
  display: flex;
  gap: 16px;
  padding: 12px 16px;
}

.pack-grid.list-view .pack-card .banner-wrap {
  width: 160px;
  min-width: 160px;
  height: 50px;
  margin-bottom: 0;
}

.pack-grid.list-view .pack-card .card-header {
  margin-bottom: 0;
  min-width: 200px;
  flex: 1;
}

.pack-grid.list-view .pack-card .card-meta {
  margin-bottom: 0;
}

.pack-grid.list-view .pack-card .card-eval {
  display: none;
}

.pack-grid.list-view .pack-card .card-tags {
  display: none;
}

.pack-grid.list-view .pack-card .card-msd-bar {
  display: none;
}

/* ============================
   Pagination
   ============================ */
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 4px;
  padding: 24px 0;
  flex-wrap: wrap;
}

.page-btn {
  min-width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-xs);
  background: var(--bg-surface);
  color: var(--text-secondary);
  font-size: .85rem;
  cursor: pointer;
  transition: all var(--transition);
  padding: 0 8px;
}

.page-btn:hover {
  border-color: var(--accent);
  color: var(--text);
}

.page-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.page-btn.disabled {
  opacity: .4;
  cursor: default;
  pointer-events: none;
}

/* ============================
   分类列表视图 (图3)
   ============================ */
.category-view {
  padding: 20px 0;
}

.category-view .view-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 28px;
}

.category-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-width: 600px;
  margin: 0 auto;
}

.category-list-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  color: var(--text);
  font-size: 1rem;
}

.category-list-item .cat-icon {
  font-size: 1.1rem;
  width: 24px;
  text-align: center;
  flex-shrink: 0;
}

.category-list-item .cat-name {
  flex: 1;
}

.category-list-item .cat-desc {
  color: var(--text-muted);
  font-size: .82rem;
  display: none;
}

.category-list-item:hover {
  background: var(--bg-elevated);
  color: var(--accent);
}

.category-list-item .item-count {
  margin-left: auto;
  font-size: .82rem;
  color: var(--text-muted);
}

.category-list-item .item-arrow {
  color: var(--text-muted);
  font-size: .85rem;
}

/* ============================
   主催视图 (图4)
   ============================ */
.series-view {
  padding: 20px 0;
}

.series-view .view-title {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 28px;
}

.series-tree {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.series-maker {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  overflow: hidden;
}

.series-maker-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 16px;
  cursor: pointer;
  transition: background var(--transition);
  user-select: none;
  border-bottom: 1px solid transparent;
}

.series-maker-header:hover {
  background: var(--bg-elevated);
}

.series-maker-toggle {
  width: 14px;
  font-size: .65rem;
  color: var(--text-muted);
  text-align: center;
  transition: transform var(--transition);
}

.series-maker.open .series-maker-toggle {
  transform: rotate(90deg);
}

.series-maker-name {
  font-size: .95rem;
  font-weight: 700;
  flex: 1;
  color: var(--text);
}

.series-maker-count {
  font-size: .78rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0;
}

.series-maker-count .c-packs,
.series-maker-count .c-songs {
  display: inline-block;
  text-align: right;
  min-width: 3em;
  font-variant-numeric: tabular-nums;
}

.series-maker-count .c-label {
  color: var(--text-muted);
}

.series-maker-body {
  display: none;
  padding: 0 16px 12px;
}

.series-maker.open .series-maker-body {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* 单个谱包卡片 */
.series-pack-card {
  flex: 0 0 calc(33.33% - 6px);
  min-width: 200px;
  height: 100px;
  position: relative;
  border-radius: var(--radius-xs);
  overflow: hidden;
  cursor: pointer;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  border: 1px solid var(--border);
  transition: transform var(--transition), border-color var(--transition);
}

.series-pack-card:hover {
  border-color: var(--accent);
}

.series-pack-card.no-banner {
  background: var(--bg-elevated);
}

.series-pack-card.no-banner .series-pack-overlay {
  background: linear-gradient(to top, rgba(0,0,0,.5) 0%, rgba(0,0,0,.1) 100%);
}

.series-pack-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.7) 0%, rgba(0,0,0,.2) 100%);
  z-index: 0;
}

.series-pack-dl {
  position: absolute;
  bottom: 6px;
  right: 6px;
  z-index: 2;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-xs);
  background: rgba(0,0,0,.45);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: all var(--transition);
  opacity: 0;
}

.series-pack-card:hover .series-pack-dl {
  opacity: 1;
}

.series-pack-dl:hover {
  background: var(--accent);
  color: #fff;
}

.series-pack-info {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding: 8px 10px;
}

.series-pack-name {
  font-size: .82rem;
  font-weight: 600;
  color: #fff;
  text-shadow: 0 1px 4px rgba(0,0,0,.5);
  line-height: 1.3;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.6em;
}

.series-pack-meta {
  font-size: .72rem;
  color: rgba(255,255,255,.7);
  margin-top: auto;
  flex-shrink: 0;
}

/* 主催视图顶部按钮不显眼，暂时隐藏 */
.nav-dan { display: none; }

/* ============================
   段位视图
   ============================ */
.dan-view {
  padding: 20px 0;
}

.dan-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 12px;
}

.dan-download-btn {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--accent);
  background: var(--accent);
  color: #fff;
  font-size: .85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
}

.dan-download-btn:hover {
  background: var(--accent-hover);
}

.dan-download-btn.small {
  padding: 4px 10px;
  font-size: .78rem;
  font-weight: 500;
  background: transparent;
  color: var(--accent);
  border-color: var(--border);
  white-space: nowrap;
}

.dan-download-btn.small:hover {
  background: var(--bg-elevated);
  border-color: var(--accent);
}

.dan-dl-batch {
  display: flex;
  gap: 6px;
  flex-shrink: 0;
  margin-left: 12px;
  width: 230px;
}

.dan-dl-batch .dan-download-btn.small {
  flex: 1;
  min-width: 0;
}

.dan-dl-vertical {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex-shrink: 0;
  margin-left: 12px;
}

.dan-dl-vertical .dan-download-btn.small {
  text-align: left;
  justify-content: flex-start;
}

.dan-dl-collapsible {
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
  margin-left: 12px;
  width: 230px;
}

.dan-dl-collapsible.vertical {
  display: block;
}

.dan-dl-first-row {
  display: flex;
  gap: 6px;
  align-items: center;
  flex: 0 0 auto;
}

.dan-dl-first-row .dan-download-btn.small {
  flex: 1;
  min-width: 0;
}

.dan-dl-first-row .dan-dl-expand {
  flex: 1;
  width: auto;
  min-width: 0;
}

.dan-dl-hidden {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  width: 100%;
  margin-top: 6px;
}

.dan-dl-collapsible.vertical > .dan-dl-hidden {
  flex-direction: column;
}

.dan-dl-expand {
  cursor: pointer;
  flex-shrink: 0;
  padding: 4px 10px;
  font-size: .72rem;
  font-weight: 400;
  background: transparent;
  color: var(--text-muted);
  border: 1px dashed var(--border);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
  font-family: var(--font);
  white-space: nowrap;
  width: 95px;
}

.dan-dl-expand:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.dan-list {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.dan-body {
  display: flex;
  gap: 24px;
  align-items: flex-start;
}

.dan-sidebar {
  width: 220px;
  flex-shrink: 0;
  position: sticky;
  top: 16px;
}

.dan-sidebar .dan-dl-vertical {
  margin-left: 0;
  width: 100%;
}

.dan-sidebar .dan-download-btn.small {
  width: 100%;
}

.dan-dl-hidden-v {
  display: flex;
  flex-direction: column;
  gap: 6px;
  width: 100%;
  margin-top: 6px;
}

.dan-dl-hidden-v .dan-download-btn.small {
  width: 100%;
}

/* 段位体系 */
.dan-system {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-surface);
  overflow: hidden;
  position: relative;
}

.dan-system-bg {
  position: absolute;
  inset: 0;
  background-size: 100% auto;
  background-position: center;
  background-repeat: no-repeat;
  z-index: 0;
  pointer-events: none;
}

.dan-system-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.dan-system.has-bg .dan-system-header {
  position: relative;
  z-index: 1;
}

.dan-system.has-bg .dan-system-header > :not(.dan-system-bg) {
  position: relative;
  z-index: 1;
}

.dan-system-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 14px 16px;
  cursor: pointer;
  transition: background var(--transition);
  user-select: none;
  border-bottom: 1px solid transparent;
}

.dan-system-header:hover {
  background: var(--bg-elevated);
}

.dan-system-header .dan-toggle {
  width: 16px;
  font-size: .7rem;
  color: var(--text-muted);
  text-align: center;
  transition: transform var(--transition);
  align-self: flex-start;
}

.dan-system.open .dan-system-header .dan-toggle {
  transform: rotate(90deg);
}

.dan-system-header .dan-system-name {
  font-size: 1rem;
  font-weight: 800;
  flex: 1;
  text-align: left;
  align-self: flex-start;
}

.dan-system-header .dan-system-count {
  font-size: .78rem;
  color: var(--text-muted);
  flex-shrink: 0;
  align-self: flex-start;
}

.dan-system-body {
  padding: 8px 12px 12px;
  display: none;
  flex-direction: column;
  gap: 6px;
}

.dan-system.open .dan-system-body {
  display: flex;
}

/* 段位版本 */
.dan-version {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  overflow: hidden;
}

.dan-version-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  cursor: pointer;
  transition: background var(--transition);
  user-select: none;
}

.dan-version-header:hover {
  background: var(--bg-elevated);
}

.dan-version-header .dan-toggle {
  width: 16px;
  font-size: .7rem;
  color: var(--text-muted);
  text-align: center;
  transition: transform var(--transition);
  align-self: flex-start;
}

.dan-version.open .dan-version-header .dan-toggle {
  transform: rotate(90deg);
}

.dan-version-header .dan-version-name {
  font-size: .95rem;
  font-weight: 700;
  flex: 1;
  text-align: left;
  align-self: flex-start;
}

.dan-version-header .dan-version-count {
  font-size: .78rem;
  color: var(--text-muted);
  flex-shrink: 0;
  align-self: flex-start;
}

.dan-version-body {
  display: none;
  padding: 0 16px 12px;
}

.dan-version.open .dan-version-body {
  display: block;
}

/* 段位 */
.dan-level {
  margin-top: 4px;
  border-left: 2px solid var(--border);
  padding-left: 12px;
}

.dan-level-header {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  cursor: pointer;
  transition: background var(--transition);
  border-radius: var(--radius-xs);
  user-select: none;
}

.dan-level-header:hover {
  background: var(--bg-elevated);
}

.dan-level-header .dan-toggle {
  width: 14px;
  font-size: .65rem;
  color: var(--text-muted);
  text-align: center;
  transition: transform var(--transition);
  align-self: flex-start;
}

.dan-level.open .dan-level-header .dan-toggle {
  transform: rotate(90deg);
}

.dan-level-header .dan-level-name {
  font-size: .88rem;
  font-weight: 600;
  color: var(--text);
  flex: 1;
  text-align: left;
  align-self: flex-start;
}

.dan-level-body {
  display: none;
  padding: 4px 0 8px 12px;
  position: relative;
  border-radius: var(--radius-xs);
}

.dan-level.open .dan-level-body {
  display: block;
}

.dan-level-body.has-bg {
  background-size: 100% auto;
  background-position: center;
  background-repeat: no-repeat;
}

.dan-level-body.has-bg::before {
  content: '';
  position: absolute;
  inset: -1px;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(3px);
  -webkit-backdrop-filter: blur(3px);
  z-index: 0;
}

.dan-level-body.has-bg > * {
  position: relative;
  z-index: 1;
}

/* 歌曲 */
.dan-song {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: var(--radius-xs);
  transition: background var(--transition);
}

.dan-song:hover {
  background: var(--bg-elevated);
}

.dan-song .song-bullet {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--text-muted);
  flex-shrink: 0;
}

.dan-song .song-name {
  font-size: .85rem;
  color: var(--text);
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dan-song .song-pack {
  font-size: .78rem;
  color: var(--text-muted);
  flex-shrink: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.dan-song .song-pack.linked {
  color: var(--accent);
  cursor: pointer;
}

.dan-song .song-pack.linked:hover {
  text-decoration: underline;
}

.dan-song .song-pack.unlinked {
  font-style: italic;
  opacity: .6;
}

.dan-song .song-pack.empty {
  opacity: .4;
}

/* ============================
   Responsive
   ============================ */
@media (max-width: 1024px) {
  .packs-sidebar {
    display: none;
  }
  .packs-sidebar.mobile-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: var(--navbar-height);
    width: 260px;
    z-index: 90;
    background: var(--bg-surface);
    padding: 20px;
    box-shadow: var(--shadow-lg);
  }
  .packs-main {
    padding: 20px 12px;
  }
}

@media (max-width: 768px) {
  .pack-grid {
    grid-template-columns: 1fr;
  }
  .pack-grid.list-view .pack-card {
    flex-direction: column;
  }
  .pack-grid.list-view .pack-card .banner-wrap {
    width: 100%;
    min-width: unset;
  }
  .control-row {
    flex-direction: column;
    align-items: stretch;
  }
  .sort-group, .filter-group {
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .range-input {
    width: 52px;
  }
}

/* Mobile sidebar toggle */
.mobile-sidebar-toggle {
  display: none;
}

@media (max-width: 1024px) {
  .mobile-sidebar-toggle {
    display: flex;
  }
}

/* ============================
   搜索模式切换 & 曲目搜索
   ============================ */
.search-mode-toggle {
  display: flex;
  gap: 4px;
}

.search-mode-btn {
  padding: 4px 14px;
  font-size: .8rem;
  border: 1px solid var(--border);
  background: var(--bg-surface);
  color: var(--text-secondary);
  border-radius: var(--radius-xs);
  cursor: pointer;
  transition: all var(--transition);
  font-family: var(--font);
}

.search-mode-btn:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.search-mode-btn.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.song-search-results {
  display: flex;
  flex-direction: column;
}

/* 歌曲列表表格（共享 pack.css 中同名类） */
.song-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .82rem;
  table-layout: fixed;
}

.song-table th {
  text-align: left;
  padding: 8px 10px;
  background: var(--bg-elevated);
  color: var(--text-muted);
  font-weight: 600;
  font-size: .75rem;
  text-transform: uppercase;
  letter-spacing: .03em;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

.song-table td {
  padding: 7px 10px;
  border-bottom: 1px solid var(--border-light);
  color: var(--text-secondary);
  vertical-align: top;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.song-table tbody tr:hover td {
  background: var(--bg-elevated);
}

.song-idx {
  color: var(--text-muted);
  text-align: right;
  white-space: nowrap;
}

.song-title-col {
  color: var(--text);
  font-weight: 500;
}

.song-artist,
.song-credit {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.song-search-table {
  font-size: .82rem;
}

.song-search-table th:nth-child(1) { width: 36px; }
.song-search-table th:nth-child(2) { width: auto; }
.song-search-table th:nth-child(3) { width: 130px; }
.song-search-table th:nth-child(4) { width: 100px; }
.song-search-table th:nth-child(5) { width: auto; }

.song-search-row {
  cursor: pointer;
}

.song-search-pack-cell {
  color: var(--text-muted) !important;
  font-size: .78rem;
}

@media (max-width: 700px) {
  .dan-body {
    flex-direction: column;
  }

  .dan-sidebar {
    width: 100%;
    position: static;
  }
}

@media (max-width: 600px) {
  .series-pack-card {
    flex: 0 0 calc(50% - 4px);
    min-width: 140px;
  }
}

@media (max-width: 400px) {
  .series-pack-card {
    flex: 0 0 100%;
    min-width: 0;
  }
}