/**
 * Reference Manager - Detail Page Styles
 *
 * 职责：参考文献详情页样式
 * 作用域：悬浮面板、引用链接、详情卡片
 * 依赖：variables.css
 *
 * 提取自：reference-manager-detail.css
 *
 * 包含：
 * - 文献区域和悬浮面板
 * - 引用链接和悬浮卡片
 * - 详情模态框
 * - Dock和TOC集成
 */

/* ==================== 1. 文档末尾的参考文献区域 ==================== */

.reference-section {
    margin-top: 60px;
    margin-left: auto;
    margin-right: auto;
    max-width: 900px;
    padding: 30px;
    background: linear-gradient(to bottom, #f8fafc, #ffffff);
    border-top: 3px solid var(--color-primary);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.reference-section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--color-border);
}

.reference-section-header h2 {
    margin: 0;
    color: var(--color-text-primary);
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-semibold);
}

.reference-section-actions {
    display: flex;
    gap: 10px;
}

.ref-manage-btn,
.ref-extract-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border-light);
    background-color: var(--color-bg-primary);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 6px;
}

.ref-manage-btn {
    background-color: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}

.ref-manage-btn:hover {
    background-color: #2563eb;
}

.ref-extract-btn:hover {
    background-color: var(--color-bg-secondary);
}

/* ==================== 2. 参考文献列表 ==================== */

.reference-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.reference-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--color-bg-primary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.reference-item:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.reference-number {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
    min-width: 40px;
}

.reference-content {
    flex: 1;
}

.reference-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.ref-authors {
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

.ref-year {
    color: var(--color-text-secondary);
}

.reference-title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-medium);
    color: #1976d2;
    margin-bottom: 6px;
    line-height: var(--leading-normal);
}

.reference-journal {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: 4px;
}

.reference-details {
    color: var(--color-text-tertiary);
    font-size: 13px;
    margin-bottom: 4px;
}

.reference-doi {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-top: 6px;
}

.reference-doi a {
    color: #2196F3;
    text-decoration: none;
}

.reference-doi a:hover {
    text-decoration: underline;
}

.reference-tags {
    display: flex;
    gap: 6px;
    margin-top: var(--spacing-sm);
}

.ref-tag-small {
    display: inline-block;
    padding: 2px var(--spacing-sm);
    background-color: #e3f2fd;
    color: #1976d2;
    border-radius: 10px;
    font-size: 11px;
}

.reference-actions {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.ref-action-icon {
    background: none;
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-sm);
    padding: 6px 10px;
    cursor: pointer;
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.ref-action-icon:hover {
    background-color: var(--color-bg-secondary);
    color: var(--color-text-primary);
}

/* ==================== 3. TOC中的参考文献链接 ==================== */

.toc-reference-link {
    border-top: 1px solid var(--color-border);
    padding-top: 10px;
    margin-top: 10px;
}

.toc-ref-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-primary) !important;
    font-weight: var(--font-weight-medium);
    transition: background-color var(--transition-fast);
}

.toc-ref-link:hover {
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius-sm);
}

/* ==================== 4. 悬浮面板（类似chatbot） ==================== */

.reference-floating-panel {
    position: fixed;
    right: 30px;
    bottom: 80px;
    width: 450px;
    height: 600px;
    max-height: 600px;
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl), 0 0 1px rgba(0, 0, 0, 0.08);
    display: flex;
    flex-direction: column;
    z-index: var(--z-popover);
    animation: slideInRight var(--transition-base) cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(8px);
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateX(0) scale(1);
    }
}

.reference-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 18px 22px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-hover));
    color: white;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    cursor: grab;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.2);
}

.reference-panel-header h3 {
    margin: 0;
    font-size: 17px;
    font-weight: var(--font-weight-semibold);
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: -0.01em;
}

.reference-panel-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.ref-panel-minimize,
.ref-panel-close {
    background: rgba(255, 255, 255, 0.15);
    border: none;
    color: white;
    font-size: 15px;
    cursor: pointer;
    padding: 6px 10px;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    backdrop-filter: blur(10px);
}

.ref-panel-minimize:hover,
.ref-panel-close:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: scale(1.05);
}

.reference-panel-toolbar {
    display: flex;
    gap: var(--spacing-sm);
    padding: 14px var(--spacing-md);
    background: linear-gradient(90deg, var(--color-bg-primary), var(--color-bg-secondary));
    border-bottom: 1px solid var(--color-border);
}

.ref-toolbar-btn {
    flex: 1;
    padding: var(--spacing-sm) 14px;
    border: 1px solid var(--color-border);
    background: var(--color-bg-primary);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 13px;
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    color: var(--color-text-primary);
}

.ref-toolbar-btn:hover {
    background: linear-gradient(135deg, var(--color-primary), #2563eb);
    color: white;
    border-color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.25);
    transform: translateY(-1px);
}

.reference-panel-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
    background: var(--color-bg-secondary);
}

/* 美化滚动条 */
.reference-panel-content::-webkit-scrollbar {
    width: 6px;
}

.reference-panel-content::-webkit-scrollbar-track {
    background: transparent;
}

.reference-panel-content::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 3px;
}

.reference-panel-content::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

.ref-panel-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px var(--spacing-lg);
    text-align: center;
    color: var(--color-text-tertiary);
}

.ref-panel-placeholder i {
    margin-bottom: var(--spacing-md);
    color: var(--color-border-light);
}

.ref-panel-placeholder p {
    margin: var(--spacing-md) 0;
    font-size: var(--font-size-sm);
}

.ref-panel-placeholder button {
    padding: var(--spacing-sm) var(--spacing-lg);
    background-color: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-sm);
    transition: background-color var(--transition-fast);
}

.ref-panel-placeholder button:hover {
    background-color: var(--color-primary-hover);
}

.ref-panel-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding: 4px;
}

.ref-panel-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    padding: 14px;
    background: linear-gradient(135deg, var(--color-bg-primary), var(--color-bg-secondary));
    border: 1px solid var(--color-border);
    border-radius: 10px;
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.ref-panel-item:hover {
    background: linear-gradient(135deg, var(--color-primary-light), #dbeafe);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.ref-panel-header {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.ref-panel-number {
    font-size: 15px;
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    min-width: 35px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #dbeafe, #eff6ff);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.ref-panel-title {
    flex: 1;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: #1e293b;
    line-height: var(--leading-relaxed);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.ref-panel-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    align-items: center;
    font-size: var(--font-size-xs);
    color: #64748b;
    margin-left: 45px;
}

.ref-panel-authors {
    font-weight: var(--font-weight-medium);
    color: #475569;
}

.ref-panel-year,
.ref-panel-journal {
    padding: 2px var(--spacing-sm);
    background-color: #f1f5f9;
    border-radius: var(--radius-sm);
    color: #64748b;
}

.ref-panel-citations {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    color: #10b981;
    background-color: #d1fae5;
    padding: 4px 10px;
    border-radius: var(--radius-full);
    width: fit-content;
    margin-left: 45px;
    font-weight: var(--font-weight-medium);
}

.ref-panel-citations i {
    font-size: 10px;
}

.ref-panel-actions {
    display: flex;
    gap: 6px;
    margin-left: 45px;
    margin-top: 4px;
}

.ref-panel-action-btn {
    flex: 1;
    padding: 6px var(--spacing-md);
    border: 1px solid #d1d5db;
    background: white;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    color: #374151;
    text-decoration: none;
}

.ref-panel-action-btn:hover {
    background: linear-gradient(135deg, var(--color-primary), #2563eb);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(59, 130, 246, 0.25);
}

.ref-panel-action-btn i {
    font-size: 11px;
}

/* ==================== 5. Dock中的文献统计样式 ==================== */

.dock-stat-item-wrapper-reference {
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.dock-stat-item-wrapper-reference:hover {
    background-color: rgba(76, 175, 80, 0.1);
}

/* ==================== 6. 参考文献条目高亮动画 ==================== */

.reference-item-highlight {
    background-color: #fff3cd !important;
    border-color: #ffc107 !important;
    animation: referenceFlash 0.5s ease 3;
}

@keyframes referenceFlash {
    0%, 100% {
        background-color: #fff3cd;
        transform: scale(1);
    }
    50% {
        background-color: #ffeb3b;
        transform: scale(1.02);
    }
}

/* ==================== 7. 原文中的引用链接 ==================== */

.reference-citation {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: var(--font-weight-medium);
    cursor: pointer;
    padding: 0 2px;
    border-radius: 3px;
    transition: all var(--transition-fast) ease;
    position: relative;
}

.reference-citation:hover {
    color: #2563eb;
    background: rgba(59, 130, 246, 0.1);
    text-decoration: none;
}

/* ==================== 8. 引用悬浮卡片 ==================== */

.reference-citation-tooltip {
    position: absolute;
    z-index: var(--z-tooltip);
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-xl);
    max-width: 400px;
    min-width: 300px;
    pointer-events: none;
    opacity: 0;
    transform: translateY(-5px);
    transition: opacity var(--transition-fast) ease, transform var(--transition-fast) ease;
    visibility: hidden;
}

.reference-citation-tooltip.show {
    opacity: 1;
    transform: translateY(0);
    visibility: visible;
}

/* ==================== 9. 详细悬浮卡片（改进版） ==================== */

.reference-detail-tooltip {
    position: absolute;
    z-index: var(--z-tooltip);
    background: white;
    border: 1px solid #e5e7eb;
    border-radius: var(--radius-lg);
    width: 420px;
    max-height: 600px;
    overflow-y: auto;
    box-shadow: var(--shadow-2xl);
    pointer-events: auto;
    opacity: 0;
    transform: scale(0.95);
    transition: opacity var(--transition-fast) ease, transform var(--transition-fast) ease;
    visibility: hidden;
}

.reference-detail-tooltip.show {
    opacity: 1;
    transform: scale(1);
    visibility: visible;
}

.tooltip-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 18px;
    background: linear-gradient(135deg, var(--color-primary), #2563eb);
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.tooltip-detail-number {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: white;
}

.tooltip-detail-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    font-size: var(--font-size-base);
    width: 28px;
    height: 28px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.tooltip-detail-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

.tooltip-detail-content {
    padding: 18px;
}

.tooltip-detail-title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: #1e293b;
    margin: 0 0 14px 0;
    line-height: var(--leading-normal);
}

.tooltip-detail-authors {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    font-size: 13px;
    color: #475569;
    margin-bottom: var(--spacing-md);
    line-height: var(--leading-relaxed);
}

.tooltip-detail-authors i {
    color: #94a3b8;
    margin-top: 2px;
    flex-shrink: 0;
}

.tooltip-detail-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-bottom: 14px;
}

.tooltip-detail-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: #f1f5f9;
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    color: #64748b;
}

.tooltip-detail-meta i {
    color: #94a3b8;
    font-size: 11px;
}

.tooltip-detail-abstract {
    margin-bottom: 14px;
    padding: var(--spacing-md);
    background: #f8f9fa;
    border-radius: var(--radius-md);
}

.tooltip-detail-abstract strong {
    font-size: var(--font-size-xs);
    color: #334155;
    display: block;
    margin-bottom: 6px;
}

.tooltip-detail-abstract p {
    font-size: 13px;
    line-height: var(--leading-relaxed);
    color: #475569;
    margin: 0;
    max-height: 150px;
    overflow-y: auto;
}

.tooltip-detail-doi {
    padding: 10px var(--spacing-md);
    background: #eff6ff;
    border-left: 3px solid var(--color-primary);
    border-radius: var(--radius-sm);
    margin-bottom: 14px;
    font-size: var(--font-size-xs);
}

.tooltip-detail-doi strong {
    color: #1e40af;
    margin-right: 6px;
}

.tooltip-detail-doi a {
    color: var(--color-primary);
    text-decoration: none;
}

.tooltip-detail-doi a:hover {
    text-decoration: underline;
}

.tooltip-detail-citations {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: var(--spacing-sm) var(--spacing-md);
    background: #d1fae5;
    border-left: 3px solid #10b981;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    color: #047857;
    margin-bottom: 14px;
}

.tooltip-detail-citations strong {
    color: #065f46;
}

.tooltip-detail-actions {
    display: flex;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) 18px;
    border-top: 1px solid #e5e7eb;
    background: #f9fafb;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

.tooltip-action-btn {
    flex: 1;
    padding: var(--spacing-sm) 14px;
    border: 1px solid #d1d5db;
    background: white;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    color: #374151;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.tooltip-action-btn:hover {
    background: linear-gradient(135deg, var(--color-primary), #2563eb);
    color: white;
    border-color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: 0 2px 6px rgba(59, 130, 246, 0.3);
}

.tooltip-action-btn i {
    font-size: 11px;
}

/* ==================== 10. 多文献列表样式 ==================== */

.tooltip-multiple-refs {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-height: 450px;
    overflow-y: auto;
}

.tooltip-ref-item {
    display: flex;
    flex-direction: column;
    background: white;
    border-radius: var(--radius-md);
    border: 1px solid #e2e8f0;
    transition: all 0.15s;
    overflow: hidden;
}

.tooltip-ref-item.expanded {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.tooltip-ref-header {
    display: flex;
    gap: 10px;
    padding: 10px;
    cursor: pointer;
    transition: all 0.15s;
}

.tooltip-ref-header:hover {
    background: #eff6ff;
}

.tooltip-ref-item.expanded .tooltip-ref-header {
    background: #eff6ff;
    border-bottom: 1px solid #e2e8f0;
}

.tooltip-ref-toggle {
    flex-shrink: 0;
    margin-left: auto;
    color: #94a3b8;
    font-size: var(--font-size-xs);
    transition: transform var(--transition-fast);
}

.tooltip-ref-toggle.expanded {
    transform: rotate(180deg);
}

.tooltip-ref-detail {
    padding: var(--spacing-md);
    background: #f8fafc;
    border-top: 1px solid #e2e8f0;
    animation: slideDown var(--transition-fast) ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.tooltip-ref-detail-section {
    margin-bottom: 10px;
    font-size: var(--font-size-xs);
    line-height: var(--leading-relaxed);
}

.tooltip-ref-detail-section:last-of-type {
    margin-bottom: 0;
}

.tooltip-ref-detail-section strong {
    color: #475569;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-bottom: 2px;
}

.tooltip-ref-detail-section i {
    font-size: 11px;
    color: #94a3b8;
}

.tooltip-ref-detail-actions {
    display: flex;
    gap: 6px;
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid #e2e8f0;
}

.tooltip-ref-action-btn {
    flex: 1;
    padding: 6px 10px;
    border: 1px solid #d1d5db;
    background: white;
    color: #475569;
    font-size: 11px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.15s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
}

.tooltip-ref-action-btn:hover {
    background: linear-gradient(135deg, var(--color-primary), #2563eb);
    color: white;
    border-color: var(--color-primary);
}

.tooltip-ref-number {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary), #2563eb);
    color: white;
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-xs);
    border-radius: var(--radius-md);
}

.tooltip-ref-info {
    flex: 1;
    min-width: 0;
}

.tooltip-ref-title {
    font-size: 13px;
    font-weight: var(--font-weight-medium);
    color: #1e293b;
    margin-bottom: 3px;
    line-height: 1.3;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.tooltip-ref-authors {
    font-size: 11px;
    color: #64748b;
    line-height: 1.3;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* 美化滚动条 */
.reference-detail-tooltip::-webkit-scrollbar {
    width: 6px;
}

.reference-detail-tooltip::-webkit-scrollbar-track {
    background: #f1f5f9;
}

.reference-detail-tooltip::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 3px;
}

.reference-detail-tooltip::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

.tooltip-detail-abstract::-webkit-scrollbar {
    width: 4px;
}

.tooltip-detail-abstract::-webkit-scrollbar-track {
    background: transparent;
}

.tooltip-detail-abstract::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 2px;
}

.tooltip-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    padding-bottom: 10px;
    border-bottom: 1px solid var(--color-border);
}

.tooltip-number {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-primary);
}

.tooltip-title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    line-height: var(--leading-normal);
}

.tooltip-authors {
    font-size: 13px;
    color: var(--color-text-secondary);
    margin-bottom: 6px;
}

.tooltip-meta {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
    margin-bottom: var(--spacing-sm);
}

.tooltip-abstract {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    line-height: var(--leading-relaxed);
    margin-top: var(--spacing-sm);
    max-height: 100px;
    overflow-y: auto;
    padding: var(--spacing-sm);
    background-color: #f8f9fa;
    border-radius: var(--radius-sm);
}

.tooltip-doi {
    font-size: 11px;
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border-light);
}

.tooltip-doi a {
    color: #2196F3;
    text-decoration: none;
}

.tooltip-doi a:hover {
    text-decoration: underline;
}

/* ==================== 11. 返回原文按钮 ==================== */

.ref-back-to-text {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    font-size: var(--font-size-xs);
    color: var(--color-primary);
    background-color: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.ref-back-to-text:hover {
    background-color: #dbeafe;
    border-color: #93c5fd;
    transform: translateX(-2px);
}

.ref-back-to-text i {
    font-size: 10px;
}

/* ==================== 12. 文献详细卡片模态框 ==================== */

.reference-detail-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: calc(var(--z-modal) + 1);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-base), visibility var(--transition-base);
}

.reference-detail-modal.show {
    opacity: 1;
    visibility: visible;
}

.reference-detail-card {
    background: white;
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 700px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: var(--shadow-2xl);
    transform: scale(0.95);
    transition: transform var(--transition-base) cubic-bezier(0.4, 0, 0.2, 1);
}

.reference-detail-modal.show .reference-detail-card {
    transform: scale(1);
}

.reference-detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 28px;
    background: linear-gradient(135deg, var(--color-primary), #2563eb);
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
}

.reference-detail-number {
    font-size: 24px;
    font-weight: var(--font-weight-bold);
    color: white;
}

.reference-detail-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    font-size: var(--font-size-xl);
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.reference-detail-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

.reference-detail-content {
    padding: 28px;
}

.reference-detail-title {
    font-size: 22px;
    font-weight: var(--font-weight-semibold);
    color: #1e293b;
    margin: 0 0 var(--spacing-lg) 0;
    line-height: var(--leading-normal);
}

.reference-detail-meta {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: #f8f9fa;
    border-radius: var(--radius-md);
}

.reference-detail-authors,
.reference-detail-year,
.reference-detail-journal {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: #475569;
}

.reference-detail-authors {
    font-weight: var(--font-weight-medium);
}

.reference-detail-authors i,
.reference-detail-year i,
.reference-detail-journal i {
    color: #94a3b8;
    width: 16px;
}

.reference-detail-publication {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-sm);
    color: #64748b;
}

.reference-detail-publication span {
    padding: 4px var(--spacing-md);
    background: #e2e8f0;
    border-radius: var(--radius-md);
}

.reference-detail-abstract {
    margin-bottom: var(--spacing-lg);
}

.reference-detail-abstract h4 {
    font-size: 15px;
    font-weight: var(--font-weight-semibold);
    color: #334155;
    margin: 0 0 var(--spacing-md) 0;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.reference-detail-abstract h4 i {
    color: #94a3b8;
}

.reference-detail-abstract p {
    font-size: var(--font-size-sm);
    line-height: var(--leading-loose);
    color: #475569;
    margin: 0;
}

.reference-detail-doi {
    padding: var(--spacing-md) var(--spacing-md);
    background: #eff6ff;
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.reference-detail-doi strong {
    color: #1e40af;
    margin-right: var(--spacing-sm);
}

.reference-detail-doi a {
    color: var(--color-primary);
    text-decoration: none;
}

.reference-detail-doi a:hover {
    text-decoration: underline;
}

.reference-detail-citations {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-md);
    background: #d1fae5;
    border-left: 4px solid #10b981;
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
    color: #047857;
    margin-bottom: var(--spacing-lg);
}

.reference-detail-citations strong {
    color: #065f46;
}

.reference-detail-actions {
    display: flex;
    gap: 10px;
    padding: var(--spacing-lg) 28px;
    border-top: 1px solid #e5e7eb;
    background: #f9fafb;
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
}

.ref-detail-btn {
    flex: 1;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 1px solid #d1d5db;
    background: white;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: #374151;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    text-decoration: none;
}

.ref-detail-btn:hover {
    background: linear-gradient(135deg, #f3f4f6, #e5e7eb);
    border-color: #9ca3af;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.ref-detail-btn-primary {
    background: linear-gradient(135deg, var(--color-primary), #2563eb);
    color: white;
    border-color: var(--color-primary);
}

.ref-detail-btn-primary:hover {
    background: linear-gradient(135deg, #2563eb, #1d4ed8);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

/* 美化滚动条 */
.reference-detail-card::-webkit-scrollbar {
    width: 8px;
}

.reference-detail-card::-webkit-scrollbar-track {
    background: #f1f5f9;
}

.reference-detail-card::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: var(--radius-sm);
}

.reference-detail-card::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* ==================== 13. 响应式设计 ==================== */

@media (max-width: 768px) {
    .reference-floating-panel {
        right: 10px;
        bottom: 70px;
        width: calc(100% - 20px);
        max-width: 400px;
    }

    .reference-section {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .reference-item {
        flex-direction: column;
    }

    .reference-actions {
        flex-direction: row;
    }
}