/* 纯白极简风格设计系统 */
        :root {
            --bg-base: #ffffff;
            --bg-surface: #f9f9fb;
            --bg-card: #ffffff;
            --bg-card-hover: #f3f4f6;
            --border: #e4e4e7;
            --border-dark: #d4d4d8;
            --text-primary: #18181b;
            --text-secondary: #52525b;
            --text-muted: #a1a1aa;
            --accent-black: #09090b;
            --accent-white: #ffffff;
            --player-height: 60px;
            --lyrics-box-height: 48px;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }
        body {
            background-color: var(--bg-base);
            color: var(--text-primary);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            height: 100vh;
            height: 100dvh;
            display: flex;
            flex-direction: column;
            overflow: hidden;
            user-select: none;
        }

        /* 顶部纯白极简条 */
        header {
            height: 46px;
            background: var(--bg-base);
            border-bottom: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
            flex-shrink: 0;
            z-index: 20;
        }
        .header-left {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .toggle-sidebar-btn {
            background: #ffffff;
            border: 1px solid var(--border);
            color: var(--text-primary);
            border-radius: 4px;
            width: 30px;
            height: 30px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.15s;
        }
        .toggle-sidebar-btn:hover {
            background: var(--bg-surface);
            border-color: var(--border-dark);
        }
        .brand {
            font-size: 15px;
            font-weight: 700;
            letter-spacing: -0.3px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .brand-badge {
            background: #09090b;
            color: #ffffff;
            padding: 1px 5px;
            border-radius: 3px;
            font-size: 10px;
            font-weight: 800;
        }
        .header-meta {
            position: relative;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        /* 网站说明帮助按钮 */
        .header-help-btn {
            display: inline-flex;
            align-items: center;
            gap: 5px;
            padding: 5px 10px;
            border-radius: 6px;
            background: #ffffff;
            border: 1px solid var(--border);
            color: #64748b;
            font-size: 12px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.15s ease;
        }
        .header-help-btn:hover {
            background: #f8fafc;
            color: #0f172a;
            border-color: #cbd5e1;
        }
        /* 帮助说明模态弹窗 */
        .help-modal-backdrop {
            position: fixed;
            top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(0, 0, 0, 0.45);
            display: none;
            justify-content: center;
            align-items: center;
            z-index: 1000;
            backdrop-filter: blur(2px);
        }
        .help-modal-box {
            background: #ffffff;
            border-radius: 12px;
            width: 90%;
            max-width: 600px;
            max-height: 85vh;
            overflow-y: auto;
            padding: 24px 28px;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.18);
            position: relative;
        }
        .help-modal-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 16px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border);
        }
        .help-modal-title {
            font-size: 17px;
            font-weight: 700;
            color: #0f172a;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .help-close-btn {
            background: transparent;
            border: none;
            font-size: 18px;
            color: #94a3b8;
            cursor: pointer;
            padding: 2px 6px;
            border-radius: 4px;
        }
        .help-close-btn:hover {
            color: #0f172a;
            background: #f1f5f9;
        }
        .help-section {
            margin-bottom: 18px;
        }
        .help-section-title {
            font-size: 14px;
            font-weight: 600;
            color: #0284c7;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .help-section p {
            font-size: 13px;
            color: #334155;
            line-height: 1.65;
            margin-bottom: 6px;
        }
        .help-section ul {
            padding-left: 18px;
            font-size: 12.8px;
            color: #475569;
            line-height: 1.6;
        }
        .help-section li {
            margin-bottom: 4px;
        }
        .help-tip-box {
            background: #f0f9ff;
            border: 1px solid #bae6fd;
            border-radius: 6px;
            padding: 10px 14px;
            font-size: 12px;
            color: #0369a1;
            margin-top: 14px;
            line-height: 1.5;
        }
        /* 右上角“我的列表”入口按钮 */
        .header-my-playlist-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 5px 10px;
            border-radius: 6px;
            background: #ffffff;
            border: 1px solid var(--border);
            color: #0f172a;
            font-size: 12px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.15s ease;
        }
        .header-my-playlist-btn:hover,
        .header-my-playlist-btn.active {
            background: #0f172a;
            color: #ffffff;
            border-color: #0f172a;
        }
        .header-my-count-badge {
            font-size: 10px;
            font-weight: 700;
            padding: 1px 5px;
            border-radius: 10px;
            background: #f1f5f9;
            color: #64748b;
            transition: all 0.15s ease;
        }
        .header-my-playlist-btn:hover .header-my-count-badge,
        .header-my-playlist-btn.active .header-my-count-badge {
            background: #334155;
            color: #f8fafc;
        }

        /* 右上角“我的列表”下拉浮层 */
        .header-my-dropdown {
            position: absolute;
            top: calc(100% + 6px);
            right: 0;
            width: 250px;
            background: #ffffff;
            border: 1px solid var(--border);
            border-radius: 8px;
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
            display: none;
            flex-direction: column;
            z-index: 100;
            overflow: hidden;
            animation: dropdownFadeIn 0.18s ease-out;
        }
        @keyframes dropdownFadeIn {
            from { opacity: 0; transform: translateY(-4px); }
            to { opacity: 1; transform: translateY(0); }
        }
        .header-my-dropdown.show {
            display: flex;
        }
        .header-my-dropdown-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 9px 12px;
            border-bottom: 1px solid #f1f5f9;
            font-size: 12px;
            font-weight: 700;
            color: #0f172a;
            background: #fafafa;
        }
        .header-my-add-btn {
            background: none;
            border: none;
            color: #2563eb;
            font-size: 11px;
            font-weight: 600;
            cursor: pointer;
            padding: 2px 4px;
            border-radius: 3px;
        }
        .header-my-add-btn:hover {
            background: #eff6ff;
        }
        .header-my-dropdown-list {
            max-height: 280px;
            overflow-y: auto;
            padding: 4px;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .header-my-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 7px 10px;
            border-radius: 5px;
            font-size: 12px;
            color: #334155;
            cursor: pointer;
            transition: all 0.15s ease;
        }
        .header-my-item:hover {
            background: #f1f5f9;
            color: #0f172a;
        }
        .header-my-item.active {
            background: #0f172a;
            color: #ffffff;
            font-weight: 600;
        }
        .header-my-item-name {
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
            flex: 1;
        }
        .header-my-item-count {
            font-size: 10.5px;
            color: #94a3b8;
            margin-left: 8px;
            flex-shrink: 0;
        }
        .header-my-item.active .header-my-item-count {
            color: #94a3b8;
        }

        /* 主体内容区 */
        .main-container {
            flex: 1;
            display: flex;
            position: relative;
            min-height: 0;
            overflow: hidden;
            background: var(--bg-surface);
        }

        /* 左侧抽屉：手绘图最新分栏结构（英文 / 中文 / 我的列表） */
        .chart-drawer {
            position: absolute;
            top: 0;
            bottom: 0;
            left: 0;
            width: 320px;
            background: #ffffff;
            border-right: 1px solid var(--border);
            z-index: 60;
            transform: translateX(-100%);
            transition: transform 0.24s cubic-bezier(0.16, 1, 0.3, 1);
            display: flex;
            flex-direction: column;
            box-shadow: 6px 0 28px rgba(0, 0, 0, 0.08);
            height: 100%;
            max-height: 100%;
            overflow: hidden;
            pointer-events: auto;
        }
        .chart-drawer.open {
            transform: translateX(0);
        }
        .drawer-backdrop {
            position: absolute;
            inset: 0;
            background: rgba(0, 0, 0, 0.35);
            z-index: 50;
            display: none;
            opacity: 0;
            transition: opacity 0.2s;
        }
        .drawer-backdrop.show {
            display: block;
            opacity: 1;
        }
        .drawer-header {
            padding: 8px 10px;
            display: flex;
            align-items: center;
            gap: 6px;
            border-bottom: 1px solid var(--border);
            flex-shrink: 0;
            background: #ffffff;
        }
        /* 搜索框与导入歌单按钮并列 */
        .drawer-header-import-btn {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 5.5px 8px;
            border-radius: 5px;
            font-size: 11.5px;
            font-weight: 600;
            color: #0f172a;
            background: #f1f5f9;
            border: 1px solid #cbd5e1;
            cursor: pointer;
            white-space: nowrap;
            flex-shrink: 0;
            transition: all 0.15s ease;
        }
        .drawer-header-import-btn:hover {
            background: #0f172a;
            color: #ffffff;
            border-color: #0f172a;
        }
        /* 自建列表标题行内嵌入导入按钮（保留兼容） */
        .accordion-header-actions {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .header-inline-import-btn {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 2.5px 7px;
            border-radius: 4px;
            font-size: 11px;
            font-weight: 600;
            color: #18181b;
            background: #f4f4f5;
            border: 1px solid #d4d4d8;
            cursor: pointer;
            transition: all 0.15s;
        }
        .header-inline-import-btn:hover {
            background: #18181b;
            color: #ffffff;
            border-color: #18181b;
        }
        .drawer-search-wrap {
            flex: 1;
            display: flex;
            align-items: center;
            background: #f8fafc;
            border: 1px solid var(--border);
            border-radius: 6px;
            padding: 4px 8px;
            gap: 6px;
            color: var(--text-muted);
            transition: border-color 0.15s, box-shadow 0.15s;
        }
        .drawer-search-wrap:focus-within {
            border-color: #18181b;
            box-shadow: 0 0 0 1px #18181b;
            color: var(--text-primary);
        }
        .drawer-search-wrap input {
            flex: 1;
            border: none;
            background: transparent;
            font-size: 12px;
            color: var(--text-primary);
            outline: none;
            padding: 2px 0;
        }
        .drawer-search-wrap input::placeholder {
            color: #a1a1aa;
        }
        .clear-search-btn {
            background: none;
            border: none;
            font-size: 11px;
            color: var(--text-muted);
            cursor: pointer;
            padding: 0 2px;
            line-height: 1;
        }
        .clear-search-btn:hover {
            color: var(--text-primary);
        }
        .close-drawer-btn {
            background: none;
            border: none;
            color: var(--text-muted);
            cursor: pointer;
            padding: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 4px;
        }
        .close-drawer-btn:hover {
            color: var(--text-primary);
            background: rgba(0, 0, 0, 0.05);
        }

        /* 抽屉单列：类似网页文章整体无框平滑滚动清单 */
        .drawer-sections-wrap {
            flex: 1;
            min-height: 0;
            overflow-y: auto;
            overflow-x: hidden;
            display: flex;
            flex-direction: column;
            padding: 12px 14px 40px 14px;
            gap: 16px; /* 分组之间自然段落留白 */
            scrollbar-width: thin;
            scrollbar-color: #e4e4e7 transparent;
            overscroll-behavior: contain;
            -webkit-overflow-scrolling: touch;
            touch-action: pan-y;
            pointer-events: auto;
            background: #ffffff;
        }
        .drawer-sections-wrap::-webkit-scrollbar {
            width: 4px;
        }
        .drawer-sections-wrap::-webkit-scrollbar-thumb {
            background: #e4e4e7;
            border-radius: 4px;
        }
        .drawer-sections-wrap::-webkit-scrollbar-thumb:hover {
            background: #d4d4d8;
        }

        /* 分组容器：彻底去除外框、背景框与阴影，如同文章的一个大段落 */
        .accordion-group {
            display: flex;
            flex-direction: column;
            border: none;
            background: transparent;
            border-radius: 0;
            margin-bottom: 0;
            transition: none;
        }

        /* 分类大标题：纯粹文章式主标题，点击展开/折叠 */
        .accordion-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 6px 4px 8px 4px;
            cursor: pointer;
            background: transparent;
            border-bottom: 1px solid #f1f5f9;
            user-select: none;
            transition: background 0.15s ease, opacity 0.15s ease;
        }
        .accordion-header:hover {
            background: #f8fafc;
            border-radius: 4px;
        }
        .accordion-header.active-group {
            background: transparent;
        }
        .accordion-title-wrap {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13.5px;
            font-weight: 700;
            color: #0f172a;
            letter-spacing: -0.2px;
        }
        .accordion-badge {
            font-size: 10px;
            font-weight: 600;
            color: #64748b;
            background: #f1f5f9;
            padding: 1px 6px;
            border-radius: 8px;
        }
        .accordion-arrow {
            display: flex;
            align-items: center;
            color: #94a3b8;
            transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1);
        }
        .accordion-group.open .accordion-arrow {
            transform: rotate(90deg);
        }

        /* 展开的内容列表：极简轻盈流式排列 */
        .accordion-body {
            display: none;
            flex-direction: column;
            padding: 4px 0 0 6px;
            border: none;
            background: transparent;
            gap: 1px;
            position: relative;
        }
        .accordion-group.open .accordion-body {
            display: flex;
        }

        /* 单个歌单条目：无框轻质流，悬浮微底色，选中高亮黑底白字 */
        .nav-item-btn {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 7px 10px 7px 8px;
            border-radius: 6px;
            cursor: pointer;
            color: #475569;
            font-size: 12.5px;
            transition: all 0.15s ease;
            background: transparent;
            border: none;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            position: relative;
        }
        .nav-item-btn:hover {
            background: #f1f5f9;
            color: #0f172a;
        }
        .nav-item-btn.active {
            background: #0f172a;
            color: #ffffff;
            font-weight: 600;
        }
        .nav-item-idx {
            font-size: 11px;
            font-weight: 600;
            color: #94a3b8;
            width: 18px;
            text-align: right;
            flex-shrink: 0;
        }
        .nav-item-btn.active .nav-item-idx {
            color: #94a3b8;
        }
        .nav-item-name {
            flex: 1;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* 更多/折叠按钮样式 */
        .drawer-more-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            padding: 6px 10px;
            margin-top: 2px;
            border-radius: 4px;
            cursor: pointer;
            background: #f4f4f5;
            border: 1px dashed #d4d4d8;
            color: var(--text-secondary);
            font-size: 11.5px;
            font-weight: 600;
            transition: all 0.15s;
            text-align: center;
        }
        .drawer-more-btn:hover {
            background: #e4e4e7;
            color: var(--text-primary);
            border-color: #a1a1aa;
        }
        .drawer-more-btn svg {
            transition: transform 0.2s ease;
        }
        .drawer-more-btn.expanded svg {
            transform: rotate(180deg);
        }

        .drawer-import-bar {
            padding: 8px 12px;
            background: #fafafa;
            border-bottom: 1px solid var(--border);
        }
        .drawer-import-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            width: 100%;
            padding: 7px 10px;
            border-radius: 5px;
            cursor: pointer;
            background: #ffffff;
            border: 1px solid var(--border);
            color: var(--text-primary);
            font-size: 12px;
            font-weight: 600;
            transition: all 0.15s;
            text-align: center;
        }
        .drawer-import-btn:hover {
            background: #18181b;
            color: #ffffff;
            border-color: #18181b;
        }

        /* 列表区主界面 */
        .content-area {
            flex: 1;
            display: flex;
            flex-direction: column;
            min-width: 0;
            background: var(--bg-surface);
            overflow: hidden;
        }

        /* 列表区标题行 */
        .chart-bar {
            padding: 10px 16px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-bottom: 1px solid var(--border);
            background: var(--bg-base);
            flex-shrink: 0;
        }
        .current-chart-info {
            display: flex;
            align-items: baseline;
            gap: 8px;
        }
        .list-section-title {
            font-size: 11px;
            color: #ffffff;
            font-weight: 800;
            background: #18181b;
            padding: 2px 6px;
            border-radius: 3px;
            letter-spacing: 0.5px;
        }
        .current-chart-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-primary);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        a.current-chart-title:hover {
            color: #0284c7;
            text-decoration: underline;
        }
        .chart-external-icon {
            display: inline-flex;
            opacity: 0.6;
            vertical-align: middle;
            transition: opacity 0.15s;
        }
        a.current-chart-title:hover .chart-external-icon {
            opacity: 1;
        }
        .current-chart-tag {
            font-size: 11px;
            color: var(--text-muted);
        }

        .play-chart-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: #18181b;
            color: #ffffff;
            border: none;
            width: 28px;
            height: 28px;
            border-radius: 4px;
            cursor: pointer;
            transition: all 0.15s;
        }
        .play-chart-btn:hover {
            background: #27272a;
            transform: translateY(-1px);
        }
        .batch-add-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border);
            width: 28px;
            height: 28px;
            border-radius: 4px;
            cursor: pointer;
            transition: all 0.15s;
        }
        .batch-add-btn:hover {
            background: #e4e4e7;
            border-color: #18181b;
            transform: translateY(-1px);
        }
        .batch-down-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--text-primary);
            border: 1px solid var(--border);
            width: 28px;
            height: 28px;
            border-radius: 4px;
            cursor: pointer;
            transition: all 0.15s;
        }
        .batch-down-btn:hover {
            background: #e4e4e7;
            border-color: #18181b;
            transform: translateY(-1px);
        }
        .batch-del-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--text-muted);
            border: 1px solid var(--border);
            width: 28px;
            height: 28px;
            border-radius: 4px;
            cursor: pointer;
            transition: all 0.15s;
        }
        .batch-del-btn:hover {
            color: #ef4444;
            border-color: #ef4444;
            background: #fee2e2;
            transform: translateY(-1px);
        }
        .song-checkbox {
            width: 16px;
            height: 16px;
            margin-left: 8px;
            cursor: pointer;
            accent-color: #18181b;
            flex-shrink: 0;
        }

        .songs-scroll-wrap {
            flex: 1;
            overflow-y: auto;
            padding: 8px 12px 14px;
            -webkit-overflow-scrolling: touch;
        }
        .songs-list {
            display: flex;
            flex-direction: column;
            gap: 4px;
            max-width: 860px;
            margin: 0 auto;
        }

        /* 歌曲行 */
        .song-row {
            display: flex;
            align-items: center;
            padding: 7px 12px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: 6px;
            cursor: default;
            transition: background 0.12s ease;
        }
        .song-row:hover {
            background: var(--bg-card-hover);
            border-color: var(--border-dark);
        }
        .song-row.playing {
            background: #f4f4f5;
            border-color: #18181b;
        }
        .song-rank {
            width: 26px;
            font-size: 12px;
            font-weight: 800;
            color: var(--text-muted);
            text-align: center;
            flex-shrink: 0;
        }
        .song-row.playing .song-rank,
        .song-rank.top3 {
            color: #18181b;
        }
        .song-cover {
            width: 34px;
            height: 34px;
            border-radius: 3px;
            object-fit: cover;
            margin: 0 10px 0 2px;
            background: #e4e4e7;
            border: 1px solid var(--border);
            flex-shrink: 0;
        }
        .song-info {
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .song-title {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            line-height: 1.3;
        }
        .song-artist {
            font-size: 11px;
            color: var(--text-secondary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            line-height: 1.3;
        }

        .song-actions {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-shrink: 0;
            margin-left: 8px;
        }
        .action-add-btn {
            width: 26px;
            height: 26px;
            border-radius: 4px;
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.15s;
        }
        .action-down-btn {
            width: 26px;
            height: 26px;
            border-radius: 4px;
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.15s;
        }
        .action-down-btn:hover {
            border-color: #18181b;
            color: #18181b;
            background: #e4e4e7;
        }
        .action-del-btn {
            width: 26px;
            height: 26px;
            border-radius: 4px;
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text-muted);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.15s;
        }
        .action-del-btn:hover {
            border-color: #ef4444;
            color: #ef4444;
            background: #fee2e2;
        }
        .save-as-playlist-btn {
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 4px;
            color: var(--text-muted);
            padding: 2px 5px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            margin-left: 2px;
        }
        .save-as-playlist-btn:hover {
            color: #18181b;
            border-color: #18181b;
            background: #e4e4e7;
        }
        .subscribe-chart-btn {
            background: #e0f2fe;
            border: 1px solid #7dd3fc;
            border-radius: 4px;
            color: #0284c7;
            padding: 2px 7px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            margin-left: 4px;
            font-size: 11px;
            font-weight: 500;
            transition: all 0.2s ease;
        }
        .subscribe-chart-btn:hover {
            background: #0284c7;
            color: #fff;
            border-color: #0284c7;
        }
        .unsubscribe-chart-btn {
            background: #fee2e2;
            border: 1px solid #fca5a5;
            border-radius: 4px;
            color: #dc2626;
            padding: 2px 7px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            margin-left: 4px;
            font-size: 11px;
            font-weight: 500;
            transition: all 0.2s ease;
        }
        .unsubscribe-chart-btn:hover {
            background: #dc2626;
            color: #fff;
            border-color: #dc2626;
        }
        .nav-item-del-btn {
            opacity: 0.6;
            transition: all 0.15s ease;
        }
        .nav-item-del-btn:hover {
            opacity: 1;
            color: #ef4444 !important;
            background: #fee2e2;
        }
        .edit-chart-name-btn {
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 4px;
            color: var(--text-muted);
            padding: 2px 5px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            margin-left: 2px;
        }
        .delete-chart-btn {
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 4px;
            color: var(--text-muted);
            padding: 2px 5px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            margin-left: 2px;
        }
        .delete-chart-btn:hover {
            color: #ef4444;
            border-color: #ef4444;
            background: #fee2e2;
        }
        .edit-chart-name-btn:hover {
            color: #18181b;
            border-color: #18181b;
        }
        .action-add-btn:hover {
            border-color: #18181b;
            color: #18181b;
            background: #e4e4e7;
        }
        .song-play-icon {
            width: 28px;
            height: 28px;
            border-radius: 4px;
            background: transparent;
            border: 1px solid var(--border);
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.15s;
        }
        .song-play-icon:hover,
        .song-row.playing .song-play-icon {
            background: #18181b;
            border-color: #18181b;
            color: #ffffff;
        }

        /* 加入歌单极简下拉浮层 */
        .playlist-picker-backdrop {
            position: absolute;
            inset: 0;
            background: rgba(0, 0, 0, 0.2);
            z-index: 100;
            display: none;
        }
        .playlist-picker-backdrop.show {
            display: block;
        }
        .playlist-picker-box {
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 280px;
            background: #ffffff;
            border: 1px solid var(--border-dark);
            border-radius: 8px;
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
            z-index: 110;
            display: none;
            flex-direction: column;
            overflow: hidden;
        }
        .playlist-picker-box.show {
            display: flex;
        }
        .picker-header-row {
            padding: 10px 14px;
            border-bottom: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            font-weight: 700;
        }
        .picker-list-wrap {
            max-height: 240px;
            overflow-y: auto;
            padding: 4px 0;
        }
        .picker-row-item {
            padding: 8px 14px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12.5px;
            cursor: pointer;
            color: var(--text-primary);
            transition: background 0.12s;
        }
        .picker-row-item:hover {
            background: #f4f4f5;
        }
        .picker-row-item.new-btn {
            border-top: 1px solid var(--border);
            color: #18181b;
            font-weight: 600;
        }

        /* 播放列表浮层与背景遮罩（贴近播放区，点击任意处收起） */
        .queue-backdrop {
            position: absolute;
            inset: 0;
            background: rgba(0, 0, 0, 0.25);
            z-index: 75;
            display: none;
            opacity: 0;
            transition: opacity 0.2s;
        }
        .queue-backdrop.show {
            display: block;
            opacity: 1;
        }

        .queue-modal {
            position: absolute;
            bottom: 0;
            left: 12px;
            width: 330px;
            max-height: 420px;
            background: #ffffff;
            border: 1px solid var(--border-dark);
            border-bottom: none;
            border-radius: 8px 8px 0 0;
            box-shadow: 0 -8px 24px rgba(0, 0, 0, 0.12);
            z-index: 80;
            display: none;
            flex-direction: column;
            overflow: hidden;
        }
        .queue-modal.open {
            display: flex;
        }
        .queue-header {
            padding: 10px 14px;
            border-bottom: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            font-weight: 700;
            background: #ffffff;
        }
        .queue-header-actions {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .save-queue-btn {
            background: #18181b;
            border: 1px solid #18181b;
            color: #ffffff;
            font-size: 11px;
            font-weight: 600;
            cursor: pointer;
            padding: 2px 7px;
            border-radius: 3px;
            transition: all 0.15s;
        }
        .save-queue-btn:hover {
            background: #27272a;
        }
        .clear-queue-btn {
            background: none;
            border: 1px solid var(--border);
            color: var(--text-muted);
            font-size: 11px;
            cursor: pointer;
            padding: 2px 6px;
            border-radius: 3px;
        }
        .clear-queue-btn:hover {
            color: #ef4444;
            border-color: #ef4444;
        }
        .queue-close-btn {
            background: none;
            border: none;
            color: var(--text-muted);
            cursor: pointer;
            padding: 2px;
        }
        .queue-close-btn:hover {
            color: var(--text-primary);
        }

        .queue-tabs {
            display: flex;
            background: #f4f4f5;
            padding: 4px;
            gap: 4px;
            border-bottom: 1px solid var(--border);
        }
        .queue-tab-btn {
            flex: 1;
            padding: 6px 0;
            font-size: 12px;
            font-weight: 600;
            border: none;
            background: transparent;
            color: var(--text-muted);
            border-radius: 4px;
            cursor: pointer;
            transition: all 0.15s;
        }
        .queue-tab-btn.active {
            background: #ffffff;
            color: #18181b;
            box-shadow: 0 1px 3px rgba(0,0,0,0.06);
        }

        .queue-items-wrap {
            flex: 1;
            overflow-y: auto;
            max-height: 320px;
            padding: 4px 0;
        }
        .queue-row {
            padding: 8px 14px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            cursor: pointer;
            color: var(--text-secondary);
            transition: background 0.12s;
        }
        .queue-row:hover {
            background: var(--bg-surface);
            color: var(--text-primary);
        }
        .queue-row.active {
            color: #18181b;
            font-weight: 700;
            background: #f4f4f5;
        }
        .queue-row-title {
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            margin-right: 6px;
        }

        /* Toast 提示 */
        .toast {
            position: fixed;
            top: 52px;
            left: 50%;
            transform: translateX(-50%) translateY(-20px);
            background: #18181b;
            border: 1px solid #27272a;
            color: #ffffff;
            padding: 6px 14px;
            border-radius: 4px;
            font-size: 11px;
            font-weight: 600;
            z-index: 150;
            pointer-events: none;
            opacity: 0;
            transition: all 0.2s ease;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        }
        .toast.show {
            transform: translateX(-50%) translateY(0);
            opacity: 1;
        }

        /* 底部常驻播放器 */
        .bottom-player-section {
            background: var(--bg-base);
            border-top: 1px solid var(--border);
            flex-shrink: 0;
            z-index: 90;
            display: flex;
            flex-direction: column;
            box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.04);
        }

        .player-ctrl-row {
            height: var(--player-height);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            padding: 0 14px;
        }

        .player-left {
            display: flex;
            align-items: center;
            gap: 10px;
            flex: 1;
            min-width: 0;
        }
        .queue-name-btn {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: var(--bg-surface);
            border: 1px solid var(--border);
            color: var(--text-primary);
            padding: 3px 7px;
            border-radius: 4px;
            font-size: 11px;
            font-weight: 600;
            cursor: pointer;
            white-space: nowrap;
            flex-shrink: 0;
            transition: all 0.15s;
        }
        .queue-name-btn:hover, .queue-name-btn.active {
            background: #18181b;
            color: #ffffff;
            border-color: #18181b;
        }
        .track-meta-wrap {
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
            gap: 2px;
        }
        .track-title-row {
            display: flex;
            align-items: baseline;
            gap: 6px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .track-name {
            font-size: 12.5px;
            font-weight: 700;
            color: var(--text-primary);
        }
        .track-artist {
            font-size: 11px;
            color: var(--text-muted);
        }

        /* 可拖动滑动进度条 */
        .progress-box {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 10px;
            color: var(--text-muted);
        }
        .seek-slider-wrap {
            flex: 1;
            position: relative;
            display: flex;
            align-items: center;
            height: 16px;
            cursor: pointer;
        }
        .seek-slider {
            -webkit-appearance: none;
            appearance: none;
            width: 100%;
            height: 4px;
            border-radius: 2px;
            background: #e4e4e7;
            outline: none;
            cursor: pointer;
            margin: 0;
            transition: background 0.15s;
        }
        .seek-slider::-webkit-slider-thumb {
            -webkit-appearance: none;
            appearance: none;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: #18181b;
            cursor: pointer;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
            transition: transform 0.1s;
        }
        .seek-slider::-webkit-slider-thumb:hover,
        .seek-slider:active::-webkit-slider-thumb {
            transform: scale(1.25);
            background: #000000;
        }
        .seek-slider::-moz-range-thumb {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: #18181b;
            border: none;
            cursor: pointer;
            box-shadow: 0 1px 3px rgba(0, 0, 0, 0.25);
        }

        .player-controls {
            display: flex;
            align-items: center;
            gap: 4px;
            flex-shrink: 0;
        }
        .ctrl-btn {
            background: none;
            border: none;
            color: var(--text-secondary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 6px;
            border-radius: 4px;
            transition: all 0.15s;
        }
        .ctrl-btn:hover {
            color: var(--text-primary);
        }
        .ctrl-btn.play-toggle {
            background: #18181b;
            color: #ffffff;
            width: 34px;
            height: 34px;
            border-radius: 50%;
        }
        .ctrl-btn.play-toggle:hover {
            background: #27272a;
            transform: scale(1.05);
        }

        /* 歌词两行显示：第一行【当前演唱句】，第二行【提前显示下一行】 */
        .bottom-lyrics-dual {
            height: var(--lyrics-box-height);
            background: var(--bg-surface);
            border-top: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            padding: 0 16px;
            text-align: center;
            overflow: hidden;
        }
        .lyric-row {
            width: 100%;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            line-height: 20px;
            font-size: 11px;
            transition: all 0.25s ease-out;
        }
        .lyric-row.current {
            color: #18181b;
            font-weight: 700;
            font-size: 12px;
            transform: scale(1.01);
        }
        .lyric-row.next {
            color: #a1a1aa;
            font-size: 10.5px;
        }

        @media (max-width: 600px) {
            .queue-modal {
                left: 0;
                right: 0;
                width: 100%;
                border-radius: 8px 8px 0 0;
            }
            .progress-box span {
                display: none;
            }
            .queue-name-btn span {
                max-width: 76px;
                overflow: hidden;
                text-overflow: ellipsis;
            }
        }

        /* 抽屉底部微小音源入口 */
        .drawer-footer-status {
            padding: 10px 14px;
            border-top: 1px solid var(--border);
            background: #fafafa;
        }
        .source-status-trigger {
            display: flex;
            align-items: center;
            gap: 7px;
            width: 100%;
            background: none;
            border: 1px solid transparent;
            border-radius: 4px;
            padding: 4px 6px;
            cursor: pointer;
            text-align: left;
            transition: all 0.2s;
        }
        .source-status-trigger:hover {
            background: #f4f4f5;
            border-color: #e4e4e7;
        }
        .source-status-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: #22c55e;
            box-shadow: 0 0 6px rgba(34, 197, 94, 0.6);
            flex-shrink: 0;
        }
        .source-status-dot.warn {
            background: #eab308;
            box-shadow: 0 0 6px rgba(234, 179, 8, 0.6);
        }
        .source-status-text {
            font-size: 11px;
            color: var(--text-muted);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* 音源雷达浮层与状态面板 */
        .source-modal-backdrop {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.45);
            backdrop-filter: blur(2px);
            z-index: 200;
        }
        .source-modal-backdrop.open {
            display: block;
        }
        .source-modal {
            display: none;
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 90%;
            max-width: 540px;
            max-height: 85vh;
            background: #ffffff;
            border: 1px solid var(--border);
            border-radius: 8px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.25);
            z-index: 210;
            flex-direction: column;
            overflow: hidden;
        }
        .source-modal.open {
            display: flex;
        }
        .source-modal-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 16px;
            border-bottom: 1px solid var(--border);
            background: #fafafa;
        }
        .source-modal-title-row {
            display: flex;
            align-items: baseline;
            gap: 8px;
        }
        .source-modal-title {
            font-size: 14px;
            font-weight: 700;
            color: #18181b;
        }
        .source-modal-time {
            font-size: 11px;
            color: var(--text-muted);
        }
        .source-modal-notice {
            padding: 8px 16px;
            background: #f4f4f5;
            font-size: 11.5px;
            color: #52525b;
            border-bottom: 1px solid var(--border);
            line-height: 1.4;
        }
        .source-list-scroll {
            flex: 1;
            overflow-y: auto;
            padding: 12px 16px;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .source-card {
            border: 1px solid #e4e4e7;
            border-radius: 6px;
            padding: 10px 12px;
            background: #ffffff;
            transition: all 0.15s;
        }
        .source-card:hover {
            border-color: #a1a1aa;
            background: #fafafa;
        }
        .source-card.is-primary {
            border-color: #18181b;
            background: #fcfcfc;
            box-shadow: 0 2px 8px rgba(0,0,0,0.04);
        }
        .source-card-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 4px;
        }
        .source-card-name-wrap {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .source-card-name {
            font-size: 13px;
            font-weight: 600;
            color: #18181b;
        }
        .source-card-badge {
            font-size: 10px;
            padding: 1px 5px;
            border-radius: 3px;
            font-weight: 600;
        }
        .source-card-badge.primary {
            background: #18181b;
            color: #ffffff;
        }
        .source-card-badge.third_party {
            background: #e0e7ff;
            color: #3730a3;
        }
        .source-card-badge.official {
            background: #dcfce7;
            color: #166534;
        }
        .source-card-status-badge {
            display: flex;
            align-items: center;
            gap: 4px;
            font-size: 11px;
            font-weight: 600;
        }
        .source-card-status-badge.healthy {
            color: #16a34a;
        }
        .source-card-status-badge.error {
            color: #dc2626;
        }
        .source-card-desc {
            font-size: 11px;
            color: var(--text-muted);
            margin-bottom: 6px;
            line-height: 1.35;
        }
        .source-card-actions {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 6px;
            border-top: 1px dashed #f4f4f5;
        }
        .source-endpoint-hint {
            font-size: 10.5px;
            color: #71717a;
            max-width: 280px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            font-family: monospace;
        }
        .source-copy-btn {
            background: #ffffff;
            border: 1px solid var(--border);
            font-size: 11px;
            padding: 3px 8px;
            border-radius: 4px;
            cursor: pointer;
            color: #27272a;
            transition: all 0.15s;
        }
        .source-copy-btn:hover {
            background: #18181b;
            color: #ffffff;
            border-color: #18181b;
        }
        .source-modal-actions {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 10px 16px;
            border-top: 1px solid var(--border);
            background: #fafafa;
        }
        .source-action-btn {
            flex: 1;
            padding: 8px 0;
            font-size: 12px;
            font-weight: 600;
            border-radius: 5px;
            border: 1px solid var(--border);
            background: #ffffff;
            color: #18181b;
            cursor: pointer;
            transition: all 0.15s;
        }
        .source-action-btn:hover {
            background: #f4f4f5;
        }
        .source-action-btn.primary {
            background: #18181b;
            color: #ffffff;
            border-color: #18181b;
        }
        .source-action-btn.primary:hover {
            background: #27272a;
        }