* { box-sizing: border-box; margin: 0; padding: 0; }

  body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    transition: background var(--transition), color var(--transition);
  }

  /* ── Header ── */
  .header {
    background: var(--header-bg);
    border-top: 3px solid var(--header-accent);
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
    position: sticky;
    top: 0;
    z-index: 200;
    box-shadow: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  }
  .header-brand {
    display: flex;
    align-items: baseline;
    gap: 14px;
  }
  .header-brand h1 {
    font-family: var(--font-display) !important;
    font-size: 1.15rem;
    font-weight: 600;
    color: #fff;
    letter-spacing: 0.02em;
  }
  .header-date {
    font-size: 0.76rem;
    color: rgba(255,255,255,0.78);
    font-family: var(--font-mono);
  }
  .header-actions {
    display: flex;
    align-items: center;
    gap: 6px;
    min-width: 0;
    flex: 1;
    justify-content: flex-end;
    overflow: visible;
  }
  .header-more-wrap {
    position: relative;
    display: flex;
    align-items: center;
    gap: 6px;
  }
  /* 高于 .btn 的 display:inline-flex，避免桌面端误显示「更多」 */
  .header-more-btn.btn {
    display: none;
  }
  .header-secondary {
    display: flex;
    align-items: center;
    gap: 6px;
  }
  .status-wrap #statusText {
    max-width: 12em;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  /* ── Buttons ── */
  .btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 12px;
    border: 1px solid rgba(255,255,255,0.18);
    border-radius: 6px;
    background: rgba(255,255,255,0.06);
    color: rgba(255,255,255,0.85);
    cursor: pointer;
    font-size: 0.76rem;
    font-family: var(--font-body);
    font-weight: 500;
    transition: all var(--transition);
    white-space: nowrap;
    text-decoration: none;
  }
  .btn:hover {
    background: rgba(255,255,255,0.14);
    border-color: rgba(255,255,255,0.3);
    color: #fff;
  }
  .btn-theme {
    font-size: 0.95rem;
    padding: 5px 8px;
    border: none;
    background: transparent;
    cursor: pointer;
    transition: transform var(--transition);
    line-height: 1;
  }
  .btn-theme:hover { transform: scale(1.15); }

  .status-wrap {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.72rem;
    /* 深色顶栏上的状态字：提高不透明度以满足可读性 */
    color: rgba(255,255,255,0.82);
    margin-right: 4px;
  }
  .status-wrap.is-hidden { display: none; }
  .status-dot {
    width: 7px; height: 7px;
    border-radius: 50%;
    flex-shrink: 0;
    transition: background var(--transition);
  }
  .status-dot.loading { background: #facc15; animation: pulse 1.2s infinite; }
  .status-dot.done    { background: #34d399; }
  .status-dot.error   { background: #f87171; }
  @keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.3} }

  /* ── Push menu ── */
  .push-wrap {
    position: relative;
    display: inline-block;
  }
  .push-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 240px;
    background: var(--panel-bg);
    color: var(--text);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    z-index: 300;
    overflow: hidden;
    border: 1px solid var(--border);
  }
  .push-menu-header {
    padding: 8px 14px;
    font-size: 0.72rem;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border);
  }
  .push-menu-item {
    display: block;
    width: 100%;
    text-align: left;
    padding: 9px 14px;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 0.82rem;
    color: var(--text);
    font-family: var(--font-body);
    transition: background var(--transition);
  }
  .push-menu-item:hover { background: var(--primary-light); color: var(--primary); }
  .push-menu-all { color: var(--accent-pa); font-weight: 600; border-top: 1px solid var(--border); }

  /* ── 大众版订阅入口 ── */
  .public-feature-wrap {
    position: relative;
    display: inline-block;
  }
  .public-feature-menu {
    right: 0;
    min-width: 190px;
  }
  .public-feature-menu-item {
    text-decoration: none;
    white-space: nowrap;
  }

  .ai-issue { margin-bottom: 26px; }
  .ai-issue-head {
    background: transparent;
    border: none;
    border-top: 2px solid var(--text);
    border-bottom: 1px solid var(--border);
    border-radius: 0;
    padding: 12px 0;
    margin-bottom: 14px;
    box-shadow: none;
  }
  .ai-issue-title {
    font-family: var(--font-display) !important;
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.45;
  }
  .ai-source-line {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 12px;
    color: var(--text-secondary);
    font-size: 0.78rem;
    margin-top: 6px;
  }
  .ai-source-line a { color: var(--primary); text-decoration: none; }
  .ai-category {
    background: transparent;
    border: none;
    border-radius: 0;
    margin-bottom: 24px;
    overflow: hidden;
    box-shadow: none;
  }
  .ai-category-head {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 4px 0 8px;
    border-bottom: 2px solid var(--primary);
    background: transparent;
    margin-bottom: 12px;
  }
  .ai-category-name { font-size: 1.15rem; font-family: var(--font-display) !important; font-weight: 700; color: var(--text); }
  .ai-category-count { margin-left: auto; color: var(--text-muted); font-size: 0.74rem; }
  .ai-category-body { display: grid; }
  .ai-item {
    display: block;
    border-bottom: 1px solid var(--border);
    padding: 0;
  }
  .ai-item:last-child { border-bottom: 0; }
  .ai-item summary {
    cursor: pointer;
    list-style: none;
    padding: 12px 14px 12px 16px;
  }
  .ai-item summary::-webkit-details-marker { display: none; }
  .ai-item-top {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    gap: 9px;
    align-items: baseline;
  }
  .ai-num {
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.72rem;
  }
  .ai-detail-title { font-weight: 650; color: var(--text); text-decoration: none; line-height: 1.55; }
  .ai-detail-title:hover { color: var(--primary); }
  .ai-detail-summary { color: var(--text-secondary); font-size: 0.81rem; line-height: 1.65; margin: 5px 0 0 34px; }
  .ai-item[open] summary { background: var(--bg); }
  .ai-body {
    color: var(--text-secondary);
    font-size: 0.82rem;
    line-height: 1.7;
    margin: 0 14px 12px 50px;
    padding-top: 10px;
    border-top: 1px solid var(--border);
  }
  .ai-analysis-text {
    font-family: var(--font-display) !important;
    font-size: 0.9rem;
    line-height: 1.85;
    color: var(--text);
  }
  .ai-card-title {
    display: grid;
    grid-template-columns: auto minmax(0, 1fr);
    align-items: baseline;
    column-gap: 10px;
  }
  .ai-item-index {
    color: var(--text-muted);
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 500;
    font-variant-numeric: tabular-nums;
    letter-spacing: 0.06em;
  }
  .ai-summary-block,
  .abstract-zh.ai-analysis-block {
    margin-left: 2.2rem;
  }
  .ai-summary-block {
    color: var(--text-secondary);
    margin-bottom: 10px;
  }
  .ai-content-label {
    color: var(--text-muted);
    font-family: var(--font-body);
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: 4px;
  }
  .ai-summary-block .ai-analysis-text {
    color: var(--text-secondary);
    font-size: 0.84rem;
  }
  .abstract-zh.ai-analysis-block {
    background: var(--primary-light);
    border-left: 3px solid var(--primary);
    margin-top: 12px;
    padding: 10px 12px;
  }
  .ai-analysis-label {
    color: var(--primary);
  }
  .lego .ai-summary-block,
  .lego .abstract-zh.ai-analysis-block {
    margin-left: 0;
  }
  .ai-links { display: flex; flex-wrap: wrap; gap: 6px; margin: 0 14px 14px 50px; }
  .ai-links a {
    color: var(--primary);
    background: var(--primary-light);
    border-radius: 3px;
    padding: 2px 7px;
    font-size: 0.72rem;
    text-decoration: none;
  }
  .ai-disclaimer { color: var(--text-muted); font-size: 0.76rem; margin: 10px 0 18px; }
  .ai-item-empty {
    color: var(--text-muted);
    font-size: 0.8rem;
    padding: 14px;
  }
  /* ── Tabs ── */
  .tabs {
    display: flex;
    background: var(--bg);
    border-bottom: 2px solid var(--border);
    padding: 0 20px;
    position: sticky;
    top: 56px;
    z-index: 100;
    overflow-x: auto;
    overflow-y: hidden;
    scrollbar-width: none;
    -ms-overflow-style: none;
    gap: 16px;
    box-shadow: none;
  }
  .tabs::-webkit-scrollbar { display: none; width: 0; height: 0; }
  .tab {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 14px 4px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 0.95rem;
    font-family: var(--font-display) !important;
    font-weight: 700;
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: all var(--transition);
    white-space: nowrap;
    font-weight: 500;
    letter-spacing: 0.01em;
  }
  .tab:hover { color: var(--text); }
  .tab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }

  /* ── Container ── */
  .container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 24px 20px 60px;
  }
  .section { display: none; }
  .section.active { display: block; }
  /* 保证 aria/hidden 与显示状态一致，不被 .active 盖掉 */
  .section[hidden] { display: none !important; }

  /* ── Cards ── */
  .card {
    background: var(--card-bg);
    padding: 24px 0;
    border: none;
    border-bottom: 1px solid var(--border);
    transition: all var(--transition);
    animation: fadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
  }
  .card:nth-child(1) { animation-delay: 0.05s; }
  .card:nth-child(2) { animation-delay: 0.1s; }
  .card:nth-child(3) { animation-delay: 0.15s; }
  .card:nth-child(4) { animation-delay: 0.2s; }
  .card:last-child { border-bottom: none; }
  .card:hover { background: rgba(0,0,0,0.015); padding-left: 8px; padding-right: 8px; }
  .dark .card:hover { background: rgba(255,255,255,0.02); padding-left: 8px; padding-right: 8px; }

  .card + .card { margin-top: 0; }

  .card-title {
    font-family: var(--font-display) !important;
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.4;
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 10px;
  }
  .card-title a {
    color: var(--text);
    text-decoration: none;
    transition: color var(--transition);
  }
  .card-title a:hover { color: var(--primary); }
  .journal-paper-card.has-translated-title .paper-title-translated {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin: 0 0 4px;
    color: var(--text);
    font-family: var(--font-zh-serif) !important;
    font-size: 1.3rem;
    font-weight: 700;
    line-height: 1.5;
  }
  .journal-paper-card.has-translated-title .paper-title-translated a {
    flex: 1 1 auto;
    min-width: 0;
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
  }
  .journal-paper-card.has-translated-title .paper-title-translated a:hover {
    color: var(--primary);
  }
  .journal-paper-card.has-translated-title .paper-title-original {
    margin-bottom: 10px;
    color: var(--text-secondary);
    font-size: 0.88rem;
    font-style: italic;
    font-weight: 500;
    line-height: 1.45;
  }
  .nerv .journal-paper-card.has-translated-title .paper-title-translated {
    color: #FF9900 !important;
    font-family: var(--font-display) !important;
  }
  .nerv .journal-paper-card.has-translated-title .paper-title-original {
    margin-bottom: 10px !important;
    padding-bottom: 0 !important;
    border-bottom: none !important;
    color: #cc7a00 !important;
    font-size: 0.84rem !important;
    font-weight: 500 !important;
  }
  .lego .journal-paper-card.has-translated-title .paper-title-translated {
    color: #111111 !important;
    font-family: var(--font-display) !important;
    font-weight: 900 !important;
  }
  .lego .journal-paper-card.has-translated-title .paper-title-original {
    margin-bottom: 10px !important;
    color: #555555 !important;
    font-size: 0.84rem !important;
    font-style: italic !important;
    font-weight: 600 !important;
  }
  .journal-new-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    margin-left: auto;
    padding: 1px 7px;
    border: 1px solid transparent;
    border-radius: 3px;
    background: var(--primary-light);
    color: var(--primary);
    font-family: var(--font-body) !important;
    font-size: 0.66rem;
    font-weight: 700;
    line-height: 1.45;
    letter-spacing: 0.06em;
    white-space: nowrap;
  }
  .dark .journal-new-badge {
    border-color: var(--primary);
    background: transparent;
    color: var(--primary);
  }
  .card-title-badges {
    display: inline-flex;
    align-items: center;
    flex: 0 0 auto;
    gap: 4px;
    margin-left: auto;
  }
  .card-title-badges .journal-new-badge,
  .card-title-badges .rel-badge {
    margin-left: 0;
  }
  .card-meta {
    font-size: 0.73rem;
    color: var(--text-muted);
    margin-top: 4px;
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
  }
  .card-meta .tag {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    padding: 1px 7px;
    border-radius: 3px;
    font-size: 0.68rem;
    font-weight: 500;
  }

  /* ── Source groups ── */
  .source-group { margin-bottom: 14px; }
  .source-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 16px;
    background: transparent;
    border: none;
    border-bottom: 2px solid var(--primary);
    font-weight: 700;
    font-size: 1.05rem;
    font-family: var(--font-display) !important;
    cursor: pointer;
    user-select: none;
    transition: background var(--transition);
    margin-top: 16px;
  }
  .source-header:hover { background: var(--primary-light); }
  .dark .source-header:hover { background: rgba(59,108,180,0.08); }
  .source-header .arrow {
    transition: transform var(--transition);
    font-size: 0.65rem;
    color: var(--text-muted);
  }
  .source-header.collapsed .arrow { transform: rotate(-90deg); }
  .source-header .count {
    margin-left: auto;
    color: var(--text-muted);
    font-weight: 400;
    font-size: 0.75rem;
  }
  .source-body {
    border: none;
    border-radius: 0;
    overflow: hidden;
    padding: 0 16px;
    display: block;
  }
  .source-body.collapsed { display: none; }

  .source-body .card {
    border-radius: 0;
    border: none;
    border-bottom: 1px solid var(--border);
    box-shadow: none;
  }
  .source-body .card:last-child { border-bottom: none; border-radius: 0; }

  /* ── Journal sections ── */
  .journal-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-bottom: 16px;
    padding: 4px 0;
  }
  .journal-nav-btn {
    padding: 5px 2px;
    margin-right: 12px;
    border: none;
    border-bottom: 2px solid transparent;
    border-radius: 0;
    background: transparent;
    cursor: pointer;
    font-size: 0.85rem;
    font-family: var(--font-display) !important;
    font-weight: 700;
    color: var(--text-secondary);
    transition: all var(--transition);
  }
  .journal-nav-btn:hover { border-bottom-color: var(--primary); color: var(--text); }
  .journal-nav-btn.active { background: transparent; color: var(--primary); border-bottom-color: var(--primary); }

  .journal-section { margin-bottom: 22px; }
  .journal-section .journal-title {
    font-size: 1.15rem;
    font-weight: 700;
    padding: 12px 16px;
    background: transparent;
    border: none;
    border-bottom: 2px solid var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display) !important;
    margin-bottom: 8px;
  }
  .journal-section .journal-title .dot {
    width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0;
  }
  .journal-issue { margin: 0 0 18px; }
  .journal-issue-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin: 0 16px;
    padding: 10px 0 8px;
    border-bottom: 1px solid var(--border);
    color: var(--text-secondary);
    font-family: var(--font-display) !important;
    font-size: 0.92rem;
    font-weight: 700;
  }
  .journal-issue-count {
    color: var(--text-muted);
    font-family: var(--font-body);
    font-size: 0.76rem;
    font-weight: 400;
  }
  .cards-wrapper {
    border: none;
    border-radius: 0;
    overflow: hidden;
    padding: 0 16px;
  }
  .cards-wrapper .card {
    border-radius: 0;
    border: none;
    border-bottom: 1px solid var(--border);
    box-shadow: none;
  }
  .cards-wrapper .card:last-child { border-bottom: none; }

  /* ── Translation & Abstract ── */
  .translation {
    margin-top: 12px;
    padding: 0 0 0 16px;
    background: transparent;
    border-left: 2px solid var(--border);
    border-radius: 0;
    font-size: 0.95rem;
    color: var(--text);
    line-height: 1.8;
    font-family: var(--font-display) !important;
  }
  .dark .translation { background: transparent; }
  .translation .tl { color: var(--primary); font-weight: 700; font-size: 0.75rem; margin-right: 8px; font-family: var(--font-body); letter-spacing: 0.05em; }
  .abstract-zh {
    margin-top: 12px;
    padding: 0;
    background: transparent;
    border-radius: 0;
    font-size: 0.95rem;
    color: var(--text);
    line-height: 1.8;
    font-family: var(--font-display) !important;
  }
  /* 中文正文须由同一中文字体覆盖汉字与标点，避免西文字体逐字形回退。 */
  body:not(.nerv):not(.lego) .zh-prose {
    font-family: var(--font-zh-serif) !important;
  }
  /* 仅替换正文数字字形；其余字符继续继承原有主题字体。 */
  body:not(.nerv):not(.lego) .reading-numeral {
    font-family: "Times New Roman", Times, serif;
    font-size: 1.08em;
    font-weight: 500;
    line-height: 1;
    -webkit-text-stroke: 0.12px currentColor;
  }
  .dark .abstract-zh { background: transparent; }
  .dark .abstract-zh.ai-analysis-block { background: var(--primary-light); }
  .authors {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 3px;
    font-style: italic;
  }

  /* ── Sentiment ── */
  .sent-dot {
    display: inline-block;
    width: 8px; height: 8px;
    border-radius: 50%;
    margin-right: 5px;
    vertical-align: middle;
    flex-shrink: 0;
  }
  .sent-vneg { background: var(--sent-vneg); }
  .sent-neg  { background: var(--sent-neg); }
  .sent-neu  { background: var(--sent-neu); }
  .sent-pos  { background: var(--sent-pos); }
  .sent-vpos { background: var(--sent-vpos); }

  .topic-badge {
    background: #f0f2f5;
    color: #636e72;
    padding: 1px 7px;
    border-radius: 3px;
    font-size: 0.66rem;
    font-weight: 500;
    margin-left: 4px;
    white-space: nowrap;
  }
  .dark .topic-badge { background: #2a2a38; color: #999; }

  mark.kw-hit {
    background: #fff3a3;
    color: #2d3436;
    padding: 0 3px;
    border-radius: 2px;
    font-weight: 600;
  }
  .dark mark.kw-hit { background: #5a4a10; color: #f0e070; }

  /* ── Research fields ── */
  .field-intro {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 14px;
    padding: 10px 14px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
  }
  .field-filter-bar {
    display: flex;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: 10px;
    margin: -4px 0 14px;
    padding: 10px 12px;
    background: var(--panel-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
  }
  .field-filter-control {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 150px;
    color: var(--text-secondary);
    font-size: 0.72rem;
    font-weight: 600;
  }
  .field-filter-search {
    flex: 1 1 220px;
  }
  .field-filter-control select,
  .field-filter-control input {
    width: 100%;
    min-height: 34px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--bg);
    color: var(--text);
    padding: 6px 9px;
    font-family: var(--font-body);
    font-size: 0.82rem;
    outline: none;
  }
  .field-filter-control select:focus,
  .field-filter-control input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-light);
  }
  .field-filter-search-btn,
  .field-filter-clear {
    min-height: 34px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: transparent;
    color: var(--text-secondary);
    padding: 6px 12px;
    cursor: pointer;
    font-family: var(--font-display) !important;
    font-size: 0.8rem;
    font-weight: 700;
    transition: all var(--transition);
  }
  .field-filter-search-btn:hover,
  .field-filter-clear:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: var(--primary-light);
  }
  .field-filter-count {
    min-height: 34px;
    display: inline-flex;
    align-items: center;
    margin-left: auto;
    color: var(--text-muted);
    font-size: 0.76rem;
    white-space: nowrap;
  }
  .rel-badge {
    display: inline-block;
    padding: 1px 7px;
    border-radius: 3px;
    font-size: 0.66rem;
    font-weight: 600;
    white-space: nowrap;
    margin-left: 4px;
  }
  .rel-high   { background: #e6f7ee; color: #0d8a4f; }
  .rel-medium { background: #e8eff8; color: #3b6cb4; }
  .rel-watch  { background: #f0f2f5; color: #6e6e7a; }
  .dark .rel-high   { background: #14331f; color: #4ade80; }
  .dark .rel-medium { background: #16233b; color: #7aa7e0; }
  .dark .rel-watch  { background: #26262f; color: #9a9aac; }
  .field-badge {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    padding: 1px 7px;
    border-radius: 3px;
    font-size: 0.66rem;
    font-weight: 500;
  }
  .grade-badge {
    display: inline-block;
    padding: 1px 6px;
    border-radius: 3px;
    font-size: 0.64rem;
    font-weight: 700;
    background: var(--primary-light);
    color: var(--primary);
  }
  .grade-badge.grade-top {
    background: rgba(201,169,110,0.18);
    color: #9a7b3f;
  }
  .dark .grade-badge.grade-top { background: rgba(201,169,110,0.22); color: #d4b483; }
  .rel-reason {
    margin-top: 5px;
    font-size: 0.76rem;
    color: var(--text-secondary);
    line-height: 1.55;
  }
  /* 研究领域: 左侧目录 + 右侧分区 */
  .field-layout {
    display: grid;
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 18px;
    align-items: start;
  }
  .field-layout.toc-collapsed {
    grid-template-columns: 34px minmax(0, 1fr);
  }
  .field-layout.toc-collapsed .field-toc { display: none; }
  .field-layout.toc-collapsed .field-sections { grid-column: 2; }
  .field-toc {
    position: sticky;
    top: 108px;
    display: flex;
    flex-direction: column;
    gap: 2px;
    max-height: calc(100vh - 130px);
    overflow-y: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
  }
  .field-toc::-webkit-scrollbar { display: none; width: 0; height: 0; }
  .field-toc-label {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    font-size: 0.96rem;
    color: var(--text);
    padding: 2px 8px 8px 10px;
    font-weight: 700;
    font-family: var(--font-display) !important;
    letter-spacing: 0.02em;
  }
  .toc-collapse-btn, .toc-restore {
    border: 1px solid var(--border);
    background: var(--panel-bg);
    color: var(--text-muted);
    cursor: pointer;
    font-family: var(--font-display) !important;
    transition: all var(--transition);
  }
  .toc-collapse-btn {
    width: 22px;
    height: 22px;
    line-height: 18px;
    font-size: 1rem;
  }
  .toc-restore {
    display: none;
    position: sticky;
    top: 108px;
    width: 30px;
    min-height: 96px;
    align-items: center;
    justify-content: center;
    writing-mode: vertical-rl;
    letter-spacing: 0.14em;
    font-size: 0.78rem;
    font-weight: 700;
  }
  .field-layout.toc-collapsed .toc-restore { display: flex; }
  .toc-collapse-btn:hover, .toc-restore:hover {
    color: var(--primary);
    border-color: var(--primary);
  }
  .field-toc-item {
    text-align: left;
    background: none;
    border: none;
    border-left: 2px solid transparent;
    cursor: pointer;
    padding: 7px 10px;
    border-radius: 0 6px 6px 0;
    font-size: 0.84rem;
    line-height: 1.38;
    color: var(--text-secondary);
    font-family: var(--font-display) !important;
    font-weight: 700;
    transition: all var(--transition);
  }
  .field-toc-item:hover { background: var(--primary-light); color: var(--primary); }
  .field-toc-item.active {
    color: var(--primary);
    border-left-color: var(--primary);
    background: var(--primary-light);
    font-weight: 600;
  }
  .field-anchor { scroll-margin-top: 110px; }
  /* 嵌套目录: 领域 -> 学科 + 期刊 */
  .toc-field-head { display: flex; align-items: center; gap: 4px; width: 100%; }
  .toc-field-name { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; cursor: pointer; font-family: var(--font-display) !important; font-weight: 700; }
  .toc-caret {
    font-size: 0.6rem; color: var(--text-muted); flex-shrink: 0; cursor: pointer;
    padding: 3px 4px; margin: -3px 0; border-radius: 4px;
    transition: transform var(--transition), color var(--transition), background var(--transition);
  }
  .toc-caret:hover { color: var(--primary); background: var(--primary-light); }
  .toc-field.expanded .toc-caret { transform: rotate(90deg); }
  .toc-children { display: none; flex-direction: column; gap: 1px; margin: 1px 0 4px; }
  .toc-children.open { display: flex; }
  .toc-disc-item, .toc-jrnl-item {
    text-align: left; background: none; border: none; cursor: pointer;
    font-family: var(--font-display) !important; border-radius: 0 6px 6px 0;
    overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
    transition: all var(--transition);
  }
  .toc-disc-item { padding: 4px 8px 4px 22px; font-size: 0.8rem; font-weight: 600; color: var(--text-secondary); font-family: var(--font-display) !important; }
  .toc-jrnl-item { padding: 3px 8px 3px 32px; font-size: 0.75rem; color: var(--text-muted); font-family: var(--font-display) !important; }
  .toc-disc-item:hover, .toc-jrnl-item:hover { background: var(--primary-light); color: var(--primary); }
  .toc-disc-item.active, .toc-jrnl-item.active, .field-toc-item.active { color: var(--primary); font-weight: 600; }
  /* 领域内: 学科分组 + 期刊分块 */
  .disc-group { margin: 10px 0 4px; scroll-margin-top: 110px; }
  .disc-label {
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--text);
    padding: 5px 4px 5px 10px;
    margin-bottom: 6px;
    border-left: 3px solid var(--primary);
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .disc-label .disc-count { color: var(--text-muted); font-weight: 400; font-size: 0.74rem; }
  .field-jrnl {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 12px;
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-secondary);
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    scroll-margin-top: 110px;
  }
  .field-jrnl .jrnl-count { margin-left: auto; color: var(--text-muted); font-weight: 400; font-size: 0.72rem; }
  /* 各板块跳转锚点的吸顶偏移 */
  .journal-section, .source-group, .news-anchor { scroll-margin-top: 110px; }
  .lecture-content h2, .lecture-content h3 { scroll-margin-top: 110px; }

  /* ── Sentiment bar ── */
  .sent-bar {
    display: flex;
    height: 36px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 4px rgba(0,0,0,0.08);
    margin: 12px 0 8px;
  }
  .sent-bar > div {
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 0.76rem;
    font-weight: 600;
    min-width: 0;
    transition: flex-grow 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  }
  .sent-legend {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
  }
  .sent-legend span { display: inline-flex; align-items: center; gap: 5px; }

  /* ── Clusters ── */
  .cluster-card {
    background: transparent;
    border: 0;
    border-top: 1px solid var(--border);
    border-left: 3px solid rgba(176, 42, 42, 0.35);
    border-radius: 0;
    padding: 13px 0 13px 16px;
    margin-bottom: 2px;
    box-shadow: none;
    transition: all var(--transition);
  }
  .cluster-card:hover {
    background: rgba(176, 42, 42, 0.025);
    border-left-color: var(--primary);
    padding-left: 20px;
  }
  .cluster-title {
    font-family: var(--font-display) !important;
    font-size: 1rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 7px;
    line-height: 1.45;
  }
  .cluster-meta {
    color: var(--text-muted);
    font-family: var(--font-body);
    font-size: 0.72rem;
    font-weight: 400;
    white-space: nowrap;
  }
  .cluster-summary {
    font-family: var(--font-display) !important;
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin-bottom: 9px;
    line-height: 1.72;
  }
  .cluster-platforms {
    display: flex;
    flex-wrap: wrap;
    gap: 5px 0;
    margin-bottom: 8px;
  }
  .platform-tag {
    display: inline-block;
    background: transparent;
    color: var(--text-secondary);
    border-bottom: 1px solid rgba(176, 42, 42, 0.28);
    padding: 0 1px 1px;
    border-radius: 0;
    font-size: 0.68rem;
    font-weight: 500;
    margin-right: 8px;
  }
  .cluster-titles {
    margin-top: 7px;
    padding-left: 16px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.62;
  }
  .cluster-titles li { margin: 2px 0; }
  /* ── Sub tabs (monitor) ── */
  .subtabs {
    display: flex;
    gap: 4px;
    margin-bottom: 18px;
    border-bottom: 1px solid var(--border);
  }
  .subtab {
    padding: 8px 16px;
    border: none;
    background: none;
    cursor: pointer;
    font-size: 0.82rem;
    font-family: var(--font-body);
    color: var(--text-secondary);
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    font-weight: 500;
    transition: all var(--transition);
  }
  .subtab:hover { color: var(--text); }
  .subtab.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }
  .subview { display: none; }
  .subview.active { display: block; }

  /* ── News hub ── */
  .news-modebar {
    display: flex;
    gap: 6px;
    margin-bottom: 18px;
    padding: 4px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    overflow-x: auto;
  }
  .news-mode-btn {
    flex: 0 0 auto;
    border: 0;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.82rem;
    font-weight: 600;
    padding: 8px 13px;
    border-radius: 4px;
    transition: all var(--transition);
    white-space: nowrap;
  }
  .news-mode-btn:hover { color: var(--text); background: var(--bg); }
  .news-mode-btn.active { color: var(--primary); background: var(--primary-light); }
  .news-overview-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    margin-bottom: 18px;
  }
  .news-summary-card {
    text-align: left;
    background: transparent;
    border: 0;
    border-top: 2px solid var(--news-card-accent, var(--primary));
    border-left: 1px solid var(--border);
    border-radius: 0;
    box-shadow: none;
    cursor: pointer;
    padding: 16px 18px;
    color: var(--text);
    font-family: var(--font-body);
    transition: all var(--transition);
    min-width: 0;
    min-height: 188px;
  }
  .news-summary-card:hover {
    background: rgba(0,0,0,0.018);
    border-left-color: var(--news-card-accent, var(--primary));
    transform: translateY(-1px);
  }
  .dark .news-summary-card:hover { background: rgba(255,255,255,0.025); }
  .news-card-hot { --news-card-accent: var(--accent-hot); }
  .news-card-political { --news-card-accent: var(--accent-news); }
  .news-card-ai { --news-card-accent: var(--accent-pa); }
  .news-summary-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 10px;
  }
  .news-summary-title {
    font-family: var(--font-display) !important;
    font-size: 1.08rem;
    font-weight: 700;
    line-height: 1.35;
  }
  .news-summary-kicker {
    color: var(--text-muted);
    font-size: 0.72rem;
    white-space: nowrap;
    border-bottom: 1px solid var(--news-card-accent, var(--border));
    padding-bottom: 1px;
  }
  .news-metrics { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }
  .news-metric {
    display: inline-flex;
    align-items: baseline;
    gap: 3px;
    background: transparent;
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 3px 7px;
    color: var(--text-secondary);
    font-size: 0.72rem;
  }
  .news-metric strong { color: var(--text); font-size: 0.86rem; }
  .news-preview-list {
    margin: 0;
    padding-left: 17px;
    color: var(--text-secondary);
    font-family: var(--font-display) !important;
    font-size: 0.86rem;
    line-height: 1.72;
  }
  .news-preview-list li {
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    margin: 2px 0;
  }
  .news-panel-title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin: 2px 0 12px;
    color: var(--text);
    font-family: var(--font-display) !important;
    font-size: 1.05rem;
    font-weight: 700;
  }
  .news-panel-note { color: var(--text-muted); font-family: var(--font-body); font-size: 0.76rem; font-weight: 400; }
  .news-detail-stack { display: grid; gap: 22px; }
  .news-detail-block { min-width: 0; }
  .news-cluster-section { margin-bottom: 18px; }
  .news-cluster-heading {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin: 0 0 12px 2px;
    border-bottom: 2px solid var(--primary);
    padding-bottom: 8px;
    font-family: var(--font-display) !important;
    font-size: 1.08rem;
    font-weight: 700;
  }
  .news-cluster-count {
    color: var(--text-muted);
    font-family: var(--font-body);
    font-size: 0.74rem;
    font-weight: 400;
  }
  .news-cluster-pending {
    margin: 0 0 14px 2px;
    color: var(--text-muted);
    font-family: var(--font-display) !important;
    font-size: 0.86rem;
  }
  .news-block-title {
    font-size: 1.15rem;
    font-family: var(--font-display) !important;
    font-weight: 700;
    margin: 0 0 10px 2px;
    color: var(--text);
    border-bottom: 2px solid var(--primary);
    padding-bottom: 8px;
  }
  @media (max-width: 768px) {
    .news-overview-grid { grid-template-columns: 1fr; }
    .news-summary-card { min-height: auto; padding: 14px 12px 14px 14px; }
    .news-modebar { margin-bottom: 14px; }
    .news-mode-btn { padding: 7px 11px; font-size: 0.76rem; }
    .skeleton-grid { grid-template-columns: 1fr; }
    .skeleton-card { min-height: 118px; }
  }
  /* ── Keyword groups ── */
  .kw-group { margin-bottom: 20px; }
  .kw-group-title {
    font-size: 0.9rem;
    font-weight: 700;
    padding: 6px 12px;
    background: #fff3a3;
    border-radius: 4px;
    display: inline-block;
    margin-bottom: 8px;
  }
  .dark .kw-group-title { background: #5a4a10; color: #f0e070; }
  .kw-group-count {
    font-size: 0.75rem;
    color: var(--text-secondary);
    font-weight: 500;
    margin-left: 6px;
  }

  /* ── Lectures ── */
  .lectures-layout {
    display: grid;
    grid-template-columns: minmax(240px, 280px) minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }
  .lectures-layout.list-collapsed {
    grid-template-columns: 34px minmax(0, 1fr);
  }
  .lectures-layout.list-collapsed .lecture-list { display: none; }
  .lectures-layout.list-collapsed .lecture-reader { grid-column: 2; }
  .lecture-list-restore {
    display: none;
    position: sticky;
    top: 108px;
    width: 30px;
    min-height: 96px;
    align-items: center;
    justify-content: center;
    writing-mode: vertical-rl;
    letter-spacing: 0.14em;
    border: 1px solid var(--border);
    background: var(--panel-bg);
    color: var(--text-muted);
    cursor: pointer;
    font-family: var(--font-display) !important;
    font-size: 0.78rem;
    font-weight: 700;
    transition: all var(--transition);
  }
  .lectures-layout.list-collapsed .lecture-list-restore { display: flex; }
  .lecture-list-restore:hover { color: var(--primary); border-color: var(--primary); }
  .lecture-list {
    display: grid;
    gap: 8px;
    position: sticky;
    top: 108px;
    /* align-self:start 使 sticky 区间 = 父容器高度（即右侧正文高度），
       列表始终贴顶，随页面下滚持续跟随，不会提前脱离 */
    align-self: start;
    max-height: calc(100vh - 130px);
    overflow-y: auto;
    overflow-x: hidden;
    align-content: start;
  }
  .lecture-list-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 2px 0 9px;
    border-bottom: 2px solid var(--primary);
    font-family: var(--font-display) !important;
    font-size: 0.98rem;
    font-weight: 700;
  }
  .lecture-list-collapse {
    width: 22px;
    height: 22px;
    border: 1px solid var(--border);
    background: var(--panel-bg);
    color: var(--text-muted);
    cursor: pointer;
    font-family: var(--font-display) !important;
    line-height: 18px;
    transition: all var(--transition);
  }
  .lecture-list-collapse:hover { color: var(--primary); border-color: var(--primary); }

  /* 讲座阅读器布局 */
  .lecture-reader {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.02);
    display: flex;
    align-items: flex-start;
    gap: 30px;
    position: relative;
  }
  .lecture-main-col {
    flex: 1;
    min-width: 0;
  }
  .lecture-reader-outline {
    position: sticky;
    top: 108px;
    width: 200px;
    flex-shrink: 0;
    align-self: flex-start;
  }
  .lecture-reader.outline-collapsed { gap: 14px; }
  .lecture-reader.outline-collapsed .lecture-reader-outline { display: none; }
  .lec-outline-restore {
    display: none;
    position: sticky;
    top: 108px;
    align-self: flex-start;
    min-height: 96px;
    padding: 10px 6px;
    border: 1px solid var(--border);
    background: var(--panel-bg);
    color: var(--text-muted);
    cursor: pointer;
    writing-mode: vertical-rl;
    letter-spacing: 0.12em;
    font-family: var(--font-display) !important;
    font-weight: 700;
    transition: all var(--transition);
  }
  .lecture-reader.outline-collapsed .lec-outline-restore { display: flex; }
  .lec-outline-restore:hover { color: var(--primary); border-color: var(--primary); }
  .lec-outline-panel {
    display: flex;
    flex-direction: column;
    max-height: calc(100vh - 160px);
    min-height: 0;
  }
  .lec-outline-header {
    font-size: 0.96rem;
    font-weight: 700;
    font-family: var(--font-display) !important;
    color: var(--text);
    margin-bottom: 12px;
    padding-left: 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  .lec-outline-close, .lec-outline-collapse {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.1rem;
    color: var(--text-muted);
  }
  .lec-outline-close { display: none; }
  .lec-outline-collapse { display: inline-flex; font-size: 1rem; }
  .lec-outline-close:hover, .lec-outline-collapse:hover { color: var(--primary); }
  .lec-outline {
    border-left: 2px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 6px;
    overflow-y: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding-right: 4px;
    min-height: 0;
  }
  .lec-outline::-webkit-scrollbar { display: none; }
  .lec-outline-item {
    text-align: left;
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--font-display) !important;
    font-size: 0.82rem;
    color: var(--text-muted);
    padding: 4px 10px 4px 14px;
    margin-left: -2px; /* overlap the border */
    border-left: 2px solid transparent;
    transition: all var(--transition);
    line-height: 1.4;
  }
  .lec-outline-item:hover, .lec-outline-item.active {
    color: var(--primary);
    border-left-color: var(--primary);
  }
  .lec-outline-item.lec-h3 {
    padding-left: 24px;
    font-size: 0.77rem;
  }
  .lec-outline-fab {
    display: none;
  }

  .lecture-card {
    width: 100%;
    min-width: 0;
    overflow: hidden;
    text-align: left;
    background: transparent;
    border: none;
    border-bottom: 1px solid var(--border);
    border-radius: 0;
    padding: 14px 0;
    cursor: pointer;
    color: var(--text);
    font-family: var(--font-body);
    transition: all var(--transition);
  }
  .lecture-card-date {
    color: var(--text-muted);
    font-size: 0.68rem;
    line-height: 1.2;
    margin-bottom: 6px;
  }
  .lecture-card:hover {
    border-bottom-color: var(--primary);
    background: rgba(0,0,0,0.02);
    padding-left: 8px;
    padding-right: 8px;
  }
  .lecture-card.active {
    border-bottom-color: var(--primary);
    background: transparent;
    padding-left: 8px;
  }
  .lecture-card-title {
    font-size: 0.88rem;
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 0;
  }
  .lecture-card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    color: var(--text-muted);
    font-size: 0.7rem;
    margin-bottom: 7px;
  }
  .lecture-card-meta span,
  .lecture-reader-meta span {
    display: inline-block;
    max-width: 100%;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 3px;
    padding: 1px 6px;
    line-height: 1.45;
  }
  .lecture-card-meta span {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .lecture-reader-meta span {
    white-space: normal;
    overflow-wrap: anywhere;
  }
  .lecture-card-summary {
    margin-top: 8px;
    color: var(--text-secondary);
    font-size: 0.76rem;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }
  .lecture-reader {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 22px 26px;
    box-shadow: var(--shadow-sm);
  }
  .lecture-reader h1 {
    font-family: var(--font-display) !important;
    font-size: 1.32rem;
    line-height: 1.45;
    margin-bottom: 10px;
  }
  .lecture-reader-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.76rem;
    padding-bottom: 14px;
    margin-bottom: 18px;
    border-bottom: 1px solid var(--border);
  }
  .lecture-content {
    font-family: var(--font-display) !important;
    line-height: 1.88;
    font-size: 0.98rem;
    color: var(--text);
  }
  .lecture-content h1,
  .lecture-content h2,
  .lecture-content h3 {
    font-family: var(--font-display) !important;
    line-height: 1.45;
  }
  .lecture-content h1 { display: none; }
  .lecture-content h2 {
    font-size: 1.12rem;
    margin: 28px 0 12px;
    padding: 12px 0 7px;
    border-top: 1px solid var(--border);
    border-bottom: 2px solid var(--primary);
    color: var(--primary);
  }
  .lecture-content h2:first-child { margin-top: 0; padding-top: 0; border-top: 0; }
  .lecture-content h3 {
    font-size: 1rem;
    margin: 20px 0 8px;
    color: var(--text);
  }
  .lecture-content p { margin: 0 0 13px; }
  .lecture-content strong { color: var(--text); font-weight: 700; }
  .lecture-content em {
    color: var(--text-secondary);
    font-style: italic;
    text-decoration: underline;
    text-decoration-color: rgba(59,108,180,0.24);
    text-underline-offset: 3px;
  }
  .lecture-meta-lines {
    color: var(--text-secondary);
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 12px;
  }
  .lecture-content hr {
    border: 0;
    border-top: 1px solid var(--border);
    margin: 18px 0 20px;
  }
  .lecture-content blockquote {
    margin: 14px 0;
    padding: 10px 14px;
    border-left: 3px solid var(--header-accent);
    background: rgba(201,169,110,0.10);
    color: var(--text-secondary);
  }
  .lecture-content ul,
  .lecture-content ol {
    margin: 8px 0 14px 22px;
    padding-left: 10px;
  }
  .lecture-content li { margin: 4px 0; }
  .lecture-table-wrap {
    overflow-x: auto;
    margin: 12px 0 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
  }
  .lecture-table-wrap table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.84rem;
  }
  .lecture-table-wrap th,
  .lecture-table-wrap td {
    padding: 8px 10px;
    border-bottom: 1px solid var(--border);
    text-align: left;
    vertical-align: top;
  }
  .lecture-table-wrap th {
    background: var(--bg);
    color: var(--text);
    font-weight: 700;
  }
  .lecture-table-wrap tr:last-child td { border-bottom: 0; }
  .lecture-content a {
    color: var(--primary);
    text-decoration: none;
    border-bottom: 1px solid rgba(59,108,180,0.3);
  }

  /* ── States ── */
  .loading-box { padding: 42px 0 56px; color: var(--text-muted); }
  .spinner {
    width: 32px; height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    margin: 0 auto 14px;
  }
  @keyframes spin { to { transform: rotate(360deg); } }
  @keyframes shimmer {
    from { transform: translateX(-100%); }
    to { transform: translateX(100%); }
  }
  .skeleton-wrap {
    display: grid;
    gap: 16px;
    max-width: 980px;
    margin: 0 auto;
  }
  .skeleton-note {
    color: var(--text-muted);
    font-size: 0.8rem;
    text-align: left;
    font-family: var(--font-body);
  }
  .skeleton-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
  .skeleton-card {
    border-top: 2px solid rgba(176, 42, 42, 0.28);
    border-left: 1px solid var(--border);
    padding: 16px 18px;
    min-height: 150px;
  }
  .skeleton-box {
    position: relative;
    overflow: hidden;
    background: rgba(0,0,0,0.06);
  }
  .dark .skeleton-box { background: rgba(255,255,255,0.07); }
  .skeleton-box::after {
    content: "";
    position: absolute;
    inset: 0;
    transform: translateX(-100%);
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.32), transparent);
    animation: shimmer 1.4s ease-in-out infinite;
  }
  .skeleton-title { height: 18px; width: 58%; margin-bottom: 18px; }
  .skeleton-meta { height: 22px; width: 34%; margin-bottom: 14px; }
  .skeleton-line { height: 10px; margin-bottom: 9px; }
  .skeleton-line.wide { width: 92%; }
  .skeleton-line.mid { width: 76%; }
  .skeleton-line.short { width: 48%; }
  .empty-state {
    text-align: center;
    padding: 50px 20px;
    color: var(--text-muted);
    font-size: 0.9rem;
  }
  .empty-state .btn { color: var(--primary); border-color: var(--primary); }

  /* ── Jump top ── */
  .jump-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 38px;
    height: 38px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 50%;
    cursor: pointer;
    font-size: 0.9rem;
    box-shadow: var(--shadow);
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition);
    color: var(--text-secondary);
  }
  .jump-top:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); color: var(--text); }

  /* ── Footer ── */
  .footer {
    text-align: center;
    padding: 30px 20px;
    font-size: 0.72rem;
    color: var(--text-muted);
    border-top: 1px solid var(--border);
    margin-top: 40px;
    line-height: 1.9;
  }
  .footer a { color: var(--primary); text-decoration: none; }
  .footer a:hover { text-decoration: underline; }