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

:root {

    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #7c3aed;
    --accent-color: #06b6d4;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --bg-light: #f9fafb;
    --bg-white: #ffffff;
    --border-color: #e5e7eb;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

.line-clamp-1 {
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 1;
}

.line-clamp-2 {
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 2;
}

.line-clamp-3 {
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 3;
}

.line-clamp-4 {
    overflow: hidden;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    -webkit-line-clamp: 4;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul,
ol {
    list-style: none;
}

.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    text-align: center;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}


.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.site-header.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-md);
    padding: 0.75rem 0;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}

.logo h1 {
    font-size: 1.75rem;
    font-weight: 800;
    color: var(--text-primary);
}

.logo-accent {
    color: var(--primary-color);
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    display: block;
    margin-top: -0.25rem;
}

.main-nav .nav-list {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.search-btn {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.search-btn:hover {
    color: var(--primary-color);
    background-color: var(--bg-light);
}

.hamburger-menu {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger-menu span {
    width: 24px;
    height: 2px;
    background-color: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition);
}


.main-content {
    margin-top: 5rem;
    padding: 2rem 0 4rem;
}

.section-header {
    margin-bottom: 2.5rem;
    text-align: center;
}

.section-title {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.125rem;
}


.featured-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 4rem;
}

.featured-card-large {
    grid-column: span 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.featured-card-large:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.featured-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.featured-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.card-image {
    position: relative;
    overflow: hidden;
    aspect-ratio: 4/3;
}

.card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.featured-card:hover .card-image img {
    transform: scale(1.05);
}

.card-category {
    position: absolute;
    top: 1rem;
    left: 1rem;
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-content {
    padding: 1.5rem;
}

.card-meta {
    display: flex;
    gap: 1rem;
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    color: var(--text-light);
}

.card-title {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-title a:hover {
    color: var(--primary-color);
}

.card-excerpt {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
}

.author {
    color: var(--text-secondary);
    font-weight: 500;
}

.read-more {
    color: var(--primary-color);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.read-more:hover {
    gap: 0.5rem;
}


.categories-section {
    background-color: var(--bg-light);
    padding: 4rem 0;
    margin: 4rem 0;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.category-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.category-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.category-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1rem;
    background-color: var(--bg-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
}

.category-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.category-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1rem;
    line-height: 1.5;
}

.category-link {
    display: inline-block;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    background-color: var(--bg-light);
}

.category-link:hover {
    background-color: var(--primary-color);
    color: white;
}


.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.article-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.article-card .card-content {
    padding: 1.5rem;
}

.article-card .card-title {
    font-size: 1.125rem;
}

.card-stats {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-light);
    font-size: 0.875rem;
}

.view-all-container {
    text-align: center;
    margin-top: 2rem;
}


.trending-section {
    background-color: var(--bg-light);
    padding: 4rem 0;
    margin: 4rem 0;
}

.trending-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.trending-card {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--bg-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.trending-card:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.trending-rank {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-light);
    min-width: 2rem;
}

.trending-content {
    flex: 1;
}

.trending-card .card-title {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
}


.in-depth-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.in-depth-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.in-depth-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.in-depth-card .card-content {
    padding: 2rem;
}

.in-depth-card .card-title {
    font-size: 1.375rem;
    margin-bottom: 1rem;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tag {
    background-color: var(--bg-light);
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
}


.list-page .main-content {
    margin-top: 5rem;
    padding-top: 1rem;
}


.breadcrumb-section {
    background-color: var(--bg-light);
    padding: 2rem 0;
    margin-bottom: 2rem;
}

.breadcrumb-nav {
    margin-bottom: 1.5rem;
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.breadcrumb-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.breadcrumb-link {
    color: var(--text-secondary);
    font-size: 0.875rem;
    transition: var(--transition);
}

.breadcrumb-link:hover {
    color: var(--primary-color);
}

.breadcrumb-current {
    color: var(--text-primary);
    font-weight: 500;
    font-size: 0.875rem;
}

.breadcrumb-separator {
    width: 16px;
    height: 16px;
    color: var(--text-light);
}

.page-header {
    text-align: center;
    margin-bottom: 1rem;
}

.page-title {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    line-height: 1.2;
}

.page-subtitle {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: 1rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.page-meta {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    font-size: 0.875rem;
    color: var(--text-light);
}


.filter-section {
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.filter-container {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    align-items: center;
    justify-content: space-between;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.filter-label {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.custom-select {
    position: relative;
    min-width: 160px;
}

.filter-select {
    appearance: none;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 0.5rem 2rem 0.5rem 0.75rem;
    font-size: 0.875rem;
    color: var(--text-primary);
    width: 100%;
    cursor: pointer;
    transition: var(--transition);
}

.filter-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.select-arrow {
    position: absolute;
    right: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: var(--text-light);
}

.filter-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    flex: 1;
    justify-content: flex-end;
}

.filter-tag {
    padding: 0.375rem 0.75rem;
    background-color: var(--bg-light);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
}

.filter-tag:hover,
.filter-tag.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}


.content-grid {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 3rem;
    margin-bottom: 4rem;
}


.main-content-area {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}


.articles-container {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.list-article-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: 250px 1fr;
}

.list-article-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.list-article-card.horizontal-card {
    grid-template-columns: 1fr;
    padding: 1.5rem;
}

.article-image {
    overflow: hidden;
    aspect-ratio: 16/17;
}

.article-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.list-article-card:hover .article-image img {
    transform: scale(1.05);
}

.article-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
}

.article-content img {
    margin: 0 auto;
}

.horizontal-card .article-content {
    padding: 0;
}

.article-card-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
    margin: 0.75rem 0;
    font-size: 0.875rem;
}

.article-category {
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.article-date {
    color: var(--text-light);
}

.article-readtime {
    color: var(--text-light);
}

.article-title {
    font-size: 1.25rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-title a:hover {
    color: var(--primary-color);
}

.article-excerpt {
    color: var(--text-secondary);


}

.article-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.article-author {
    color: var(--text-secondary);
    font-weight: 500;
}

.article-stats {
    display: flex;
    gap: 1rem;
    color: var(--text-light);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}


.pagination {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
}

.pagination-list {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pagination-item {
    display: inline-block;
}

.pagination-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 0.75rem;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid transparent;
}

.pagination-link:hover {
    background-color: var(--bg-light);
    color: var(--primary-color);
}

.pagination-link.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.pagination-prev,
.pagination-next {
    gap: 0.5rem;
}

.pagination-ellipsis {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    color: var(--text-light);
}

.pagination-info {
    font-size: 0.875rem;
    color: var(--text-secondary);
}


.sidebar {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.sidebar-widget {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.widget-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-color);
}

.widget-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: 1rem;
}


.recommended-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.recommended-item {
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.recommended-item:last-child {
    padding-bottom: 0;
    border-bottom: none;
}

.recommended-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.recommended-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
}

.recommended-category {
    color: var(--primary-color);
    font-weight: 600;
}

.recommended-date {
    color: var(--text-light);
}

.recommended-title {
    font-size: 0.875rem;
    font-weight: 600;
    line-height: 1.4;
}

.recommended-title a:hover {
    color: var(--primary-color);
}


.tags-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag-link {
    padding: 0.375rem 0.75rem;
    background-color: var(--bg-light);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 500;
    transition: var(--transition);
    border: 1px solid transparent;
}

.tag-link:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.tag-link-large {
    font-size: 0.875rem;
    padding: 0.5rem 1rem;
}


.sidebar-subscribe-form .form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.sidebar-subscribe-form input {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    color: var(--text-primary);
    transition: var(--transition);
}

.sidebar-subscribe-form input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.sidebar-subscribe-form .btn {
    width: 100%;
}


.resource-links {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.resource-link {
    color: var(--text-secondary);
    font-size: 0.875rem;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.resource-link:hover {
    color: var(--primary-color);
    padding-left: 0.5rem;
}

.resource-link:last-child {
    border-bottom: none;
}


.detail-page .main-content {
    margin-top: 5rem;
    padding-top: 1rem;
}


.article-detail {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    margin-bottom: 3rem;
}

.article-header {
    padding: 2.5rem 2.5rem 0;
}

.article-categories {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.article-category {
    background-color: var(--primary-color);
    color: white;
    padding: 0.375rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    transition: var(--transition);
}

.article-category:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}

.article-title {
    font-size: 2.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.article-subtitle {
    font-size: 1.25rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-weight: 400;
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.article-author {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex: 1;
}

.author-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--border-color);
}

.author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.author-info {
    display: flex;
    flex-direction: column;
}

.author-name {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 1.125rem;
}

.author-title {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.article-meta-info {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    align-items: center;
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

.meta-item svg {
    color: var(--text-light);
}

.featured-image {
    margin: 2rem 0;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.featured-image img {
    width: 100%;
    height: auto;
    display: block;
}

.image-caption {
    padding: 0.75rem 1rem;
    background-color: var(--bg-light);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-style: italic;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.article-content {
    padding: 0 2.5rem 2.5rem;
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-primary);
}

.content-intro {
    margin-bottom: 3rem;
}

.lead-paragraph {
    font-size: 1.375rem;
    line-height: 1.7;
    color: var(--text-primary);
    margin-bottom: 2rem;
    font-weight: 400;
}

.key-takeaways {
    background-color: var(--bg-light);
    border-left: 4px solid var(--primary-color);
    padding: 1.5rem 2rem;
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin: 2rem 0;
}

.key-takeaways h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.key-takeaways ul {
    list-style: none;
    padding: 0;
}

.key-takeaways li {
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
}

.key-takeaways li:before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.75rem;
    width: 8px;
    height: 8px;
    background-color: var(--primary-color);
    border-radius: 50%;
}

.article-content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 2.5rem 0 1rem;
    color: var(--text-primary);
    line-height: 1.3;
}

.article-content h3 {
    font-size: 1.375rem;
    font-weight: 600;
    margin: 0 0 1rem;
    color: var(--text-primary);
}

.article-content p {
    margin-bottom: 1.5rem;
}

.article-content ol,
.article-content ul {
    margin: 1.5rem 0;
    padding-left: 2rem;
}

.article-content li {
    margin-bottom: 0.75rem;
}

.content-blockquote {
    margin: 2.5rem 0;
    padding: 2rem;
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-color);
}

.content-blockquote blockquote {
    margin: 0;
    padding: 0;
    font-style: italic;
    font-size: 1.25rem;
    line-height: 1.6;
    color: var(--text-primary);
}

.content-blockquote cite {
    display: block;
    margin-top: 1rem;
    font-style: normal;
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.content-image {
    margin: 2.5rem 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.content-image img {
    width: 100%;
    height: auto;
    display: block;
}

.content-table {
    margin: 2.5rem 0;
    overflow-x: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.content-table table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

.content-table th {
    background-color: var(--bg-light);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--border-color);
}

.content-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.content-table tr:hover {
    background-color: var(--bg-light);
}

.content-table tr:last-child td {
    border-bottom: none;
}

.content-note {
    display: flex;
    gap: 1rem;
    margin: 2.5rem 0;
    padding: 1.5rem;
    background-color: rgba(6, 182, 212, 0.1);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--accent-color);
}

.note-icon {
    flex-shrink: 0;
    color: var(--accent-color);
}

.note-content h4 {
    font-size: 1.125rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.note-content p {
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--text-secondary);
}

.content-conclusion {
    margin: 2.5rem 0;
    padding: 2rem;
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
}

.content-conclusion h3 {
    font-size: 1.5rem;
    margin-top: 0;
    color: var(--primary-color);
}

.content-resources {
    margin: 2.5rem 0;
    padding: 1.5rem;
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
}

.content-resources h3 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.content-resources ul {
    list-style: none;
    padding: 0;
}

.content-resources li {
    margin-bottom: 0.75rem;
    padding-left: 1.5rem;
    position: relative;
}

.content-resources li:before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

.content-resources a {
    color: var(--primary-color);
    font-weight: 500;
}

.content-resources a:hover {
    text-decoration: underline;
}

.article-footer {
    padding: 2.5rem;
    border-top: 1px solid var(--border-color);
    margin-top: 2rem;
}

.article-tags {
    margin-bottom: 2rem;
}

.article-tags h4 {
    font-size: 1rem;
    margin-bottom: 1rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tags-list .tag {
    padding: 0.5rem 1rem;
    background-color: var(--bg-light);
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

.tags-list .tag:hover {
    background-color: var(--primary-color);
    color: white;
}

.article-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.share-section h4 {
    font-size: 1rem;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
    font-weight: 600;
}

.share-buttons {
    display: flex;
    gap: 0.75rem;
}

.share-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.share-btn[data-platform="twitter"]:hover {
    background-color: #1DA1F2;
    color: white;
    border-color: #1DA1F2;
}

.share-btn[data-platform="linkedin"]:hover {
    background-color: #0077B5;
    color: white;
    border-color: #0077B5;
}

.share-btn[data-platform="facebook"]:hover {
    background-color: #4267B2;
    color: white;
    border-color: #4267B2;
}

.share-btn[data-platform="copy"]:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.article-meta-footer {
    display: flex;
    gap: 1.5rem;
}

.article-meta-footer .meta-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}


.comments-section {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    margin-bottom: 3rem;
}

.comments-header {
    margin-bottom: 2rem;
    text-align: center;
}

.comments-header .section-title {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.comments-count {
    color: var(--primary-color);
    font-weight: 700;
}

.comments-header .section-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

.comments-container {
    max-width: 800px;
    margin: 0 auto;
}

.comment-form {
    background-color: var(--bg-light);
    padding: 2rem;
    border-radius: var(--radius-lg);
    margin-bottom: 2.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-textarea,
.form-input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    color: var(--text-primary);
    transition: var(--transition);
    background-color: var(--bg-white);
}

.form-textarea:focus,
.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin: 1rem 0;
}

.form-actions {
    margin-top: 1.5rem;
}

.comments-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-bottom: 2.5rem;
}

.comment {
    padding: 1.5rem;
    background-color: var(--bg-light);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
}

.comment-header {
    margin-bottom: 1rem;
}

.comment-author {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.author-avatar.small {
    width: 40px;
    height: 40px;
}

.author-avatar.small img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.comment .author-info {
    display: flex;
    flex-direction: column;
}

.comment .author-name {
    font-weight: 700;
    color: var(--text-primary);
    font-size: 1rem;
}

.comment-date {
    color: var(--text-light);
    font-size: 0.75rem;
}

.comment-content {
    margin-bottom: 1rem;
    line-height: 1.6;
    color: var(--text-primary);
}

.comment-actions {
    display: flex;
    gap: 1rem;
}

.comment-action {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
    cursor: pointer;
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.comment-action:hover {
    background-color: rgba(0, 0, 0, 0.05);
    color: var(--primary-color);
}

.comment-action svg {
    width: 16px;
    height: 16px;
}

.view-comments {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}


.related-articles {
    margin-bottom: 3rem;
}

.related-header {
    text-align: center;
    margin-bottom: 2rem;
}

.related-header .section-title {
    font-size: 1.75rem;
    margin-bottom: 0.5rem;
}

.related-header .section-subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.related-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.related-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.related-image {
    height: 200px;
    overflow: hidden;
}

.related-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.related-card:hover .related-image img {
    transform: scale(1.05);
}

.related-content {
    padding: 1.5rem;
}

.related-meta {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.75rem;
    font-size: 0.75rem;
}

.related-category {
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    text-transform: uppercase;
}

.related-date {
    color: var(--text-light);
}

.related-title {
    font-size: 1.125rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 0.75rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related-title a:hover {
    color: var(--primary-color);
}

.related-excerpt {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}


.author-widget .widget-author {
    text-align: center;
    padding: 1.5rem;
    background-color: var(--bg-light);
    border-radius: var(--radius-lg);
}

.author-avatar.large {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 1rem;
    border: 3px solid var(--primary-color);
}

.author-avatar.large img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.author-details {
    margin-bottom: 1.5rem;
}

.author-details .author-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
}

.author-details .author-title {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 0.75rem;
}

.author-details .author-bio {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
}

.author-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

.author-link {
    padding: 0.5rem 1rem;
    background-color: var(--primary-color);
    color: white;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

.author-link:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
}


.toc-nav {
    padding: 1rem 0;
}

.toc-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-list li {
    margin-bottom: 0.5rem;
}

.toc-link {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.toc-link:hover {
    background-color: var(--bg-light);
    color: var(--primary-color);
    border-left-color: var(--primary-color);
    padding-left: 1.25rem;
}


.site-footer {
    background-color: var(--text-primary);
    color: white;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-col h4 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: white;
}

.footer-logo h3 {
    font-size: 1.75rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.footer-description {
    color: #d1d5db;
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    transition: var(--transition);
}

.social-link:hover {
    background-color: var(--primary-color);
    transform: translateY(-2px);
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: #d1d5db;
    font-size: 0.875rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
    padding-left: 0.25rem;
}

.footer-text {
    color: #d1d5db;
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.subscribe-form .form-group {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.subscribe-form input {
    flex: 1;
    padding: 0.75rem 1rem;
    border: none;
    border-radius: var(--radius-md);
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 0.875rem;
}

.subscribe-form input::placeholder {
    color: #9ca3af;
}

.subscribe-form input:focus {
    outline: none;
    background-color: rgba(255, 255, 255, 0.15);
}

.form-note {
    font-size: 0.75rem;
    color: #9ca3af;
    line-height: 1.5;
}

.footer-bottom {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px 0;
    font-size: 0.875rem;
    color: #9ca3af;
}

.footer-bottom-links {
    display: flex;
    gap: 1.5rem;
}

.footer-bottom-links a {
    color: #9ca3af;
    transition: var(--transition);
}

.footer-bottom-links a:hover {
    color: white;
}


.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 999;
    box-shadow: var(--shadow-md);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}


@media (max-width: 1024px) {
    .featured-grid {
        grid-template-columns: 1fr;
    }

    .featured-card-large {
        grid-column: span 1;
        grid-template-columns: 1fr;
    }

    .content-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .list-article-card {
        grid-template-columns: 200px 1fr;
    }

    .page-title {
        font-size: 2rem;
    }

    .article-title {
        font-size: 2rem;
    }

    .article-subtitle {
        font-size: 1.125rem;
    }

    .article-header,
    .article-content,
    .article-footer {
        padding: 1.5rem;
    }

    .article-meta {
        flex-direction: column;
        align-items: flex-start;
    }

    .article-meta-info {
        width: 100%;
        justify-content: flex-start;
    }
}

@media (max-width: 768px) {
    .site-header {
        position: absolute;
        padding: .5rem 0;
    }

    .logo h1 {
        font-size: 1.5rem;
    }

    .main-content {
        margin-top: 3.5rem;
        padding-top: 10px;
    }

    .header-content {
        flex-wrap: wrap;
    }

    .main-nav {
        order: 3;
        width: 100%;
        display: none;
    }

    .main-nav.active {
        display: block;
    }

    .nav-list {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem 0;
    }

    .hamburger-menu {
        display: flex;
    }

    .hamburger-menu.active span:nth-child(1) {
        transform: rotate(45deg) translate(6px, 6px);
    }

    .hamburger-menu.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger-menu.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }

    .section-title {
        font-size: 1.75rem;
    }

    .filter-container {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .filter-tags {
        justify-content: flex-start;
        width: 100%;
    }

    .list-article-card {
        grid-template-columns: 1fr;
    }

    .article-image {
        aspect-ratio: 16/9;
    }

    .page-title {
        font-size: 1.75rem;
    }

    .page-subtitle {
        font-size: 1rem;
    }

    .pagination-list {
        flex-wrap: wrap;
        justify-content: center;
    }

    .content-grid {
        display: block;
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .article-detail {
        border: none;
    }

    .article-title {
        font-size: 1.45rem;
    }

    .lead-paragraph {
        font-size: 1.125rem;
    }

    .article-content {
        font-size: 1rem;
    }

    .content-blockquote blockquote {
        font-size: 1.125rem;
    }

    .article-actions {
        flex-direction: column;
        align-items: flex-start;
    }

    .share-section {
        width: 100%;
    }
    
    .breadcrumb-section{
        padding: 10px;
        margin-bottom: 10px;
    }

    .article-meta{
        padding-bottom: 10px;
        margin-bottom: 0;
    }

    .article-meta-footer {
        width: 100%;
        justify-content: space-between;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .related-grid {
        grid-template-columns: 1fr;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }

    .footer-bottom-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 1rem;
    }

    .articles-grid,
    .categories-grid,
    .in-depth-grid {
        grid-template-columns: 1fr;
    }

    .header-actions {
        margin-left: auto;
    }

    .subscribe-form .form-group {
        flex-direction: column;
    }

    .article-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.75rem;
    }

    .article-stats {
        width: 100%;
        justify-content: space-between;
    }

    .filter-group {
        width: 100%;
        justify-content: space-between;
    }

    .custom-select {
        flex: 1;
        min-width: auto;
    }

    .article-header,
    .article-content,
    .article-footer,
    .comments-section {
        padding: 1rem;
    }

    .article-title {
        font-size: 1.5rem;
    }

    .article-subtitle {
        font-size: 1rem;
    }

    .article-author {
        flex-direction: column;
        align-items: flex-start;
    }

    .author-info {
        margin-left: 0;
    }

    .key-takeaways {
        padding: 1rem;
    }

    .content-blockquote {
        padding: 1rem;
    }

    .content-note {
        flex-direction: column;
        align-items: flex-start;
    }
}


@media print {

    .site-header,
    .site-footer,
    .back-to-top {
        display: none;
    }

    .main-content {
        margin-top: 0;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
    }

    a {
        color: #000;
        text-decoration: underline;
    }
}