/**
 * 内容 SEO 链接样式
 * 用于文章和解决方案页面的相关产品、相关内容和外部链接
 * 
 * @package Corporate_Theme
 * @since 1.0.0
 */

/* ============================================
   CSS 变量
   ============================================ */
:root {
    --primary-blue: #1976d2;
    --primary-dark: #1565c0;
    --primary-light: #42a5f5;
    --success-green: #4caf50;
    --text-primary: #1a1a1a;
    --text-secondary: #666;
    --text-light: #999;
    --bg-white: #ffffff;
    --bg-light: #fafbfc;
    --bg-gray: #f5f7fa;
    --border-light: #e8eaed;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);
    --shadow-xl: 0 12px 40px rgba(0,0,0,0.15);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   内容 SEO 链接容器
   ============================================ */
.content-seo-links-section {
    margin-top: 60px;
    padding-top: 60px;
    border-top: 2px solid var(--border-light);
}

/* ============================================
   相关产品样式
   ============================================ */
.content-seo-links-section .related-products {
    background: var(--bg-white);
    padding: 72px 56px;
    margin: 48px 0;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
}

.content-seo-links-section .related-products h2 {
    font-size: 40px;
    color: var(--text-primary);
    margin: 0 0 56px 0;
    text-align: center;
    font-weight: 800;
    letter-spacing: -0.5px;
    position: relative;
    padding-bottom: 24px;
}

.content-seo-links-section .related-products h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 5px;
    background: linear-gradient(90deg, #1976d2 0%, #42a5f5 100%);
    border-radius: 3px;
    box-shadow: 0 2px 8px rgba(25, 118, 210, 0.3);
}

.content-seo-links-section .related-products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 36px;
}

.content-seo-links-section .related-product-card {
    background: var(--bg-white);
    border: 2px solid var(--border-light);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    text-decoration: none;
    display: block;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.06);
    position: relative;
    background: linear-gradient(135deg, #ffffff 0%, #fafbfc 100%);
}

.content-seo-links-section .related-product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #1976d2 0%, #42a5f5 50%, #1976d2 100%);
    transform: scaleX(0);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 2;
}

.content-seo-links-section .related-product-card:hover::before {
    transform: scaleX(1);
}

.content-seo-links-section .related-product-card:hover {
    border-color: #1976d2;
    transform: translateY(-12px);
    box-shadow: 0 20px 40px rgba(25, 118, 210, 0.15);
}

.content-seo-links-section .related-product-image {
    width: 100%;
    height: 220px;
    overflow: hidden;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.content-seo-links-section .related-product-image::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(25, 118, 210, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(25, 118, 210, 0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.content-seo-links-section .related-product-image::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(25, 118, 210, 0.05) 0%, rgba(66, 165, 245, 0.05) 100%);
    opacity: 0;
    transition: var(--transition);
    z-index: 1;
}

.content-seo-links-section .related-product-card:hover .related-product-image::after {
    opacity: 1;
}

.content-seo-links-section .related-product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    z-index: 1;
    image-rendering: -webkit-optimize-contrast;
    image-rendering: crisp-edges;
    transform: translateZ(0);
    -webkit-backface-visibility: hidden;
    backface-visibility: hidden;
}

.content-seo-links-section .related-product-card:hover .related-product-image img {
    transform: scale(1.05);
}

.content-seo-links-section .related-product-info {
    padding: 40px 32px;
    background: #ffffff;
    position: relative;
}

.content-seo-links-section .related-product-info::before {
    content: '';
    position: absolute;
    top: 0;
    left: 32px;
    right: 32px;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, #e8eaed 50%, transparent 100%);
}

.content-seo-links-section .related-product-info h3 {
    font-size: 20px;
    color: var(--text-primary);
    margin: 0 0 12px 0;
    font-weight: 700;
    line-height: 1.4;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.content-seo-links-section .related-product-info h3::before {
    content: '▸';
    color: #1976d2;
    font-size: 16px;
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.3s ease;
}

.content-seo-links-section .related-product-card:hover .related-product-info h3 {
    color: #1976d2;
    transform: translateX(0);
}

.content-seo-links-section .related-product-card:hover .related-product-info h3::before {
    opacity: 1;
    transform: translateX(0);
}

.content-seo-links-section .related-product-info p {
    font-size: 15px;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.7;
    font-weight: 500;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ============================================
   相关阅读样式（简约卡片）
   ============================================ */
.content-seo-links-section .related-content-simple {
    background: var(--bg-white);
    padding: 72px 56px;
    margin: 48px 0;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
}

.content-seo-links-section .related-content-simple h2 {
    font-size: 40px;
    color: var(--text-primary);
    margin: 0 0 56px 0;
    text-align: center;
    font-weight: 800;
    letter-spacing: -0.5px;
    position: relative;
    padding-bottom: 24px;
}

.content-seo-links-section .related-content-simple h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 5px;
    background: linear-gradient(90deg, #1976d2 0%, #42a5f5 100%);
    border-radius: 3px;
    box-shadow: 0 2px 8px rgba(25, 118, 210, 0.3);
}

.content-seo-links-section .related-content-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.content-seo-links-section .content-simple-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    padding: 36px 32px;
    border-radius: var(--radius-md);
    border: 2px solid var(--border-light);
    text-decoration: none;
    display: block;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.content-seo-links-section .content-simple-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: linear-gradient(180deg, #1976d2 0%, #42a5f5 100%);
    transform: scaleY(0);
    transition: var(--transition);
}

.content-seo-links-section .content-simple-card:hover::before {
    transform: scaleY(1);
}

.content-seo-links-section .content-simple-card:hover {
    background: var(--bg-white);
    border-color: #1976d2;
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.content-seo-links-section .content-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-light);
}

.content-seo-links-section .content-type-tag {
    background: linear-gradient(135deg, #1976d2 0%, #1565c0 100%);
    color: #fff;
    padding: 4px 12px;
    border-radius: 16px;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.content-seo-links-section .content-type-tag.solution {
    background: linear-gradient(135deg, #4caf50 0%, #388e3c 100%);
}

.content-seo-links-section .content-date {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-light);
}

.content-seo-links-section .content-date .dashicons {
    font-size: 16px;
    width: 16px;
    height: 16px;
}

.content-seo-links-section .content-card-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 12px 0;
    line-height: 1.4;
    transition: var(--transition);
}

.content-seo-links-section .content-simple-card:hover .content-card-title {
    color: #1976d2;
}

.content-seo-links-section .content-card-excerpt {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin: 0 0 16px 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.content-seo-links-section .content-read-more {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: #1976d2;
    transition: var(--transition);
}

.content-seo-links-section .content-read-more .dashicons {
    font-size: 18px;
    width: 18px;
    height: 18px;
    transition: var(--transition);
}

.content-seo-links-section .content-simple-card:hover .content-read-more {
    gap: 10px;
}

.content-seo-links-section .content-simple-card:hover .content-read-more .dashicons {
    transform: translateX(4px);
}

/* ============================================
   外部链接样式
   ============================================ */
.content-seo-links-section .external-links-section {
    background: var(--bg-white);
    padding: 72px 56px;
    margin: 48px 0;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
}

.content-seo-links-section .external-links-section h2 {
    font-size: 40px;
    color: var(--text-primary);
    margin: 0 0 56px 0;
    text-align: center;
    font-weight: 800;
    letter-spacing: -0.5px;
    position: relative;
    padding-bottom: 24px;
}

.content-seo-links-section .external-links-section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 5px;
    background: linear-gradient(90deg, #1976d2 0%, #42a5f5 100%);
    border-radius: 3px;
    box-shadow: 0 2px 8px rgba(25, 118, 210, 0.3);
}

.content-seo-links-section .external-links-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
}

.content-seo-links-section .external-link-card {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    padding: 32px;
    border-radius: var(--radius-md);
    border: 2px solid var(--border-light);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 20px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.content-seo-links-section .external-link-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 5px;
    height: 100%;
    background: linear-gradient(180deg, #1976d2 0%, #42a5f5 100%);
    transform: scaleY(0);
    transition: var(--transition);
}

.content-seo-links-section .external-link-card:hover::before {
    transform: scaleY(1);
}

.content-seo-links-section .external-link-card:hover {
    background: var(--bg-white);
    border-color: #1976d2;
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
}

.content-seo-links-section .link-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #1976d2 0%, #1565c0 100%);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 28px;
    transition: var(--transition);
}

.content-seo-links-section .external-link-card:hover .link-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: 0 8px 20px rgba(25, 118, 210, 0.4);
}

.content-seo-links-section .link-icon .dashicons {
    font-size: 28px;
    width: 28px;
    height: 28px;
}

.content-seo-links-section .link-content {
    flex: 1;
}

.content-seo-links-section .link-content h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0 0 8px 0;
    line-height: 1.4;
    transition: var(--transition);
}

.content-seo-links-section .external-link-card:hover .link-content h3 {
    color: #1976d2;
}

.content-seo-links-section .link-content p {
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.6;
}

.content-seo-links-section .link-arrow {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    background: rgba(25, 118, 210, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #1976d2;
    transition: var(--transition);
}

.content-seo-links-section .external-link-card:hover .link-arrow {
    background: #1976d2;
    color: #fff;
    transform: translateX(4px);
}

.content-seo-links-section .link-arrow .dashicons {
    font-size: 20px;
    width: 20px;
    height: 20px;
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
    .content-seo-links-section .related-products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .content-seo-links-section .related-products,
    .content-seo-links-section .related-content-simple,
    .content-seo-links-section .external-links-section {
        padding: 48px 32px;
    }
    
    .content-seo-links-section .related-products-grid,
    .content-seo-links-section .related-content-grid,
    .content-seo-links-section .external-links-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .content-seo-links-section .related-products h2,
    .content-seo-links-section .related-content-simple h2,
    .content-seo-links-section .external-links-section h2 {
        font-size: 32px;
        margin-bottom: 40px;
    }
}