/* 统一内链管理系统样式 */

/* 基础布局 */
.internal-links-section {
    padding: var(--spacing-2xl, 2rem) 0;
    background: var(--background-secondary, #f8f9fa);
    margin: var(--spacing-xl, 1.5rem) 0;
}

.section-container {
    max-width: var(--container-max-width, 1200px);
    margin: 0 auto;
    padding: 0 var(--spacing-lg, 1rem);
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary, #1a1a1a);
    margin: 0 0 var(--spacing-lg, 1rem) 0;
    text-align: center;
}

/* 网格布局 */
.internal-links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg, 1rem);
    margin-top: var(--spacing-xl, 1.5rem);
}

/* 加载状态 */
.internal-links-loading {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-xl, 1.5rem);
    color: var(--text-secondary, #666);
    font-size: 0.9rem;
}

.loading-text {
    display: inline-block;
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 1; }
}

/* 链接卡片 */
.internal-link-card {
    display: flex;
    align-items: center;
    padding: var(--spacing-lg, 1rem);
    background: var(--background-card, #ffffff);
    border: 1px solid var(--border-color, #e1e5e9);
    border-radius: var(--radius-md, 8px);
    text-decoration: none;
    transition: all var(--transition-fast, 0.2s) ease;
    position: relative;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.internal-link-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium, 0 4px 12px rgba(0, 0, 0, 0.15));
    border-color: var(--primary-color, #007bff);
}

.internal-link-card:focus {
    outline: 2px solid var(--primary-color, #007bff);
    outline-offset: 2px;
}

.internal-link-card:hover .link-arrow {
    transform: translateX(4px);
    opacity: 1;
}

/* 图标样式 */
.link-icon {
    font-size: 2rem;
    margin-right: var(--spacing-md, 0.75rem);
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    background: var(--background-secondary, #f8f9fa);
    border-radius: var(--radius-sm, 6px);
    transition: all var(--transition-fast, 0.2s) ease;
}

/* 内容区域 */
.link-content {
    flex: 1;
    min-width: 0;
}

.link-title {
    display: block;
    font-weight: 600;
    color: var(--text-primary, #1a1a1a);
    margin-bottom: var(--spacing-xs, 0.25rem);
    font-size: 1rem;
    line-height: 1.3;
}

.link-description {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary, #666);
    line-height: 1.4;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

/* 箭头指示器 */
.link-arrow {
    font-size: 1.2rem;
    color: var(--primary-color, #007bff);
    margin-left: var(--spacing-sm, 0.5rem);
    opacity: 0.6;
    transition: all var(--transition-fast, 0.2s) ease;
    flex-shrink: 0;
}

/* 分类特定样式 */
.internal-link-card[data-category="calculator"] .link-icon {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.internal-link-card[data-category="device-info"] .link-icon {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.internal-link-card[data-category="tools"] .link-icon {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

.internal-link-card[data-category="reference"] .link-icon {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
    color: white;
}

.internal-link-card[data-category="content"] .link-icon {
    background: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    color: white;
}

/* 错误状态 */
.internal-links-error {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-xl, 1.5rem);
    color: var(--text-secondary, #666);
    background: var(--background-card, #ffffff);
    border: 1px solid var(--border-color, #e1e5e9);
    border-radius: var(--radius-md, 8px);
}

.internal-links-error .error-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm, 0.5rem);
    display: block;
}

.internal-links-error .error-message {
    font-weight: 500;
    margin-bottom: var(--spacing-xs, 0.25rem);
    color: var(--text-primary, #1a1a1a);
}

.internal-links-error .error-description {
    font-size: 0.875rem;
    opacity: 0.8;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .internal-links-section {
        padding: var(--spacing-xl, 1.5rem) 0;
    }
    
    .internal-links-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md, 0.75rem);
        margin-top: var(--spacing-lg, 1rem);
    }
    
    .internal-link-card {
        padding: var(--spacing-md, 0.75rem);
    }
    
    .link-icon {
        font-size: 1.5rem;
        width: 2.5rem;
        height: 2.5rem;
        margin-right: var(--spacing-sm, 0.5rem);
    }
    
    .link-title {
        font-size: 0.9rem;
    }
    
    .link-description {
        font-size: 0.8rem;
        -webkit-line-clamp: 1;
    }
    
    .section-title {
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .internal-links-section {
        padding: var(--spacing-lg, 1rem) 0;
    }
    
    .section-container {
        padding: 0 var(--spacing-md, 0.75rem);
    }
    
    .internal-links-grid {
        margin-top: var(--spacing-md, 0.75rem);
    }
    
    .internal-link-card {
        padding: var(--spacing-sm, 0.5rem) var(--spacing-md, 0.75rem);
    }
    
    .link-icon {
        width: 2rem;
        height: 2rem;
        font-size: 1.25rem;
    }
    
    .section-title {
        font-size: 1.125rem;
        margin-bottom: var(--spacing-md, 0.75rem);
    }
}

/* 大屏幕优化 */
@media (min-width: 1200px) {
    .internal-links-grid {
        grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    }
}

/* 暗色主题支持 */
[data-theme="dark"] .internal-links-section {
    background: var(--background-secondary-dark, #1a1a1a);
}

[data-theme="dark"] .internal-link-card {
    background: var(--background-card-dark, #2d2d2d);
    border-color: var(--border-color-dark, #404040);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
}

[data-theme="dark"] .internal-link-card:hover {
    border-color: var(--primary-color, #007bff);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .link-icon {
    background: var(--background-secondary-dark, #1a1a1a);
}

[data-theme="dark"] .link-title {
    color: var(--text-primary-dark, #ffffff);
}

[data-theme="dark"] .link-description {
    color: var(--text-secondary-dark, #b3b3b3);
}

[data-theme="dark"] .section-title {
    color: var(--text-primary-dark, #ffffff);
}

[data-theme="dark"] .internal-links-loading {
    color: var(--text-secondary-dark, #b3b3b3);
}

[data-theme="dark"] .internal-links-error {
    background: var(--background-card-dark, #2d2d2d);
    border-color: var(--border-color-dark, #404040);
    color: var(--text-secondary-dark, #b3b3b3);
}

[data-theme="dark"] .internal-links-error .error-message {
    color: var(--text-primary-dark, #ffffff);
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
    .internal-link-card {
        border-width: 2px;
    }
    
    .internal-link-card:focus {
        outline-width: 3px;
    }
    
    .link-title {
        font-weight: 700;
    }
}

/* 减少动画模式支持 */
@media (prefers-reduced-motion: reduce) {
    .internal-link-card,
    .link-arrow,
    .link-icon,
    .loading-text {
        transition: none;
        animation: none;
    }
    
    .internal-link-card:hover {
        transform: none;
    }
    
    .internal-link-card:hover .link-arrow {
        transform: none;
    }
}

/* 打印样式 */
@media print {
    .internal-links-section {
        background: white;
        padding: 1rem 0;
    }
    
    .internal-link-card {
        background: white;
        border: 1px solid #ccc;
        box-shadow: none;
        break-inside: avoid;
        margin-bottom: 0.5rem;
    }
    
    .internal-link-card:hover {
        transform: none;
        box-shadow: none;
    }
    
    .link-arrow {
        display: none;
    }
    
    .link-icon {
        background: #f5f5f5;
    }
    
    /* 显示链接URL */
    .internal-link-card::after {
        content: " (" attr(href) ")";
        font-size: 0.8rem;
        color: #666;
        display: block;
        margin-top: 0.25rem;
    }
}

/* 无障碍增强 */
.internal-link-card:focus-visible {
    outline: 2px solid var(--primary-color, #007bff);
    outline-offset: 2px;
}

/* 为屏幕阅读器隐藏装饰性元素 */
.link-arrow[aria-hidden="true"],
.link-icon[aria-hidden="true"] {
    speak: none;
}

/* 确保足够的颜色对比度 */
.link-description {
    color: var(--text-secondary, #4a4a4a);
}

[data-theme="dark"] .link-description {
    color: var(--text-secondary-dark, #cccccc);
}