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

:root {

    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #7c3aed;
    --accent-color: #0ea5e9;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --text-lighter: #9ca3af;
    --bg-color: #ffffff;
    --bg-light: #f9fafb;
    --bg-lighter: #f3f4f6;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --shadow-color: rgba(0, 0, 0, 0.05);


    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;


    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;


    --shadow-sm: 0 1px 2px 0 var(--shadow-color);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);


    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;


    --header-height: 64px;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
    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 var(--space-md);
}


h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-sm);
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

h5 {
    font-size: 1.125rem;
}

h6 {
    font-size: 1rem;
}

p {
    margin-bottom: var(--space-sm);
    line-height: 1.7;
}

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

a:hover {
    color: var(--primary-dark);
}

ul,
ol {
    padding-left: var(--space-lg);
    margin-bottom: var(--space-md);
    list-style: none;
}

li {
    margin-bottom: var(--space-xs);
    list-style: none;
}

blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: var(--space-md);
    margin: var(--space-lg) 0;
    font-style: italic;
    color: var(--text-light);
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.25rem;
    font-weight: 600;
    font-size: 0.875rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-base);
    text-align: center;
    line-height: 1;
    white-space: nowrap;
    user-select: none;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    color: white;
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    border-color: var(--border-color);
    color: var(--text-color);
}

.btn-outline:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.05);
}

.btn-full-width {
    width: 100%;
}

.btn-small {
    padding: 0.375rem 0.75rem;
    font-size: 0.75rem;
}


.form-group {
    margin-bottom: var(--space-md);
}

.form-label {
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-color);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-family: var(--font-sans);
    transition: all var(--transition-base);
    background-color: var(--bg-color);
}

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

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

.form-row {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.form-row .form-group {
    flex: 1;
    margin-bottom: 0;
}

.checkbox-label,
.radio-label {
    display: flex;
    align-items: flex-start;
    gap: var(--space-xs);
    font-size: 0.875rem;
    color: var(--text-light);
    cursor: pointer;
}

.checkbox-label input,
.radio-label input {
    margin-top: 0.25rem;
    flex-shrink: 0;
}


.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all var(--transition-base);
    height: var(--header-height);
    display: flex;
    align-items: center;
}

.site-header.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-sm);
}

.site-header.transparent {
    background-color: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

.site-header.transparent.scrolled {
    background-color: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
}

.main-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 0.5rem 0;
}

.logo {
    display: flex;
    flex-direction: column;
    font-weight: 800;
    color: var(--text-color);
    transition: color var(--transition-fast);
}

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

.logo-text {
    font-size: 1.75rem;
    line-height: 1;
}

.logo-subtitle {
    font-size: 0.75rem;
    color: var(--text-light);
    font-weight: 400;
    letter-spacing: 0.5px;
}

.nav-menu {
    display: flex;
    align-items: center;
}

.nav-list {
    display: flex;
    list-style: none;
    margin-right: var(--space-lg);
}

.nav-item {
    position: relative;
    margin-left: var(--space-lg);
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

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

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


.has-dropdown {
    display: flex;
    align-items: center;
}

.has-dropdown::after {
    content: '▼';
    font-size: 0.6rem;
    margin-left: 0.25rem;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    width: 220px;
    background-color: var(--bg-color);
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-base);
    z-index: 100;
    border: 1px solid var(--border-color);
}

.nav-item:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-content {
    padding: var(--space-sm) 0;
}

.dropdown-item {
    display: block;
    padding: 0.625rem var(--space-md);
    color: var(--text-color);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
}

.dropdown-item:hover {
    background-color: var(--bg-light);
    color: var(--primary-color);
    padding-left: calc(var(--space-md) + 4px);
}

.dropdown-item.active {
    background-color: rgba(37, 99, 235, 0.05);
    color: var(--primary-color);
    font-weight: 500;
}


.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.hamburger-line {
    width: 100%;
    height: 2px;
    background-color: var(--text-color);
    transition: all var(--transition-base);
    transform-origin: left center;
}

.hamburger.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(2px, -1px);
}

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

.hamburger.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(2px, 1px);
}


.breadcrumb-section {
    padding: var(--space-sm) 0;
}



.breadcrumb-list {
    display: flex;
    flex-wrap: wrap;
    list-style: none;
    align-items: center;
    font-size: 0.875rem;
    padding-left: 0;
}

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

.breadcrumb-item::after {
    content: '/';
    margin: 0 var(--space-xs);
    color: var(--text-lighter);
}

.breadcrumb-item:last-child::after {
    content: '';
}

.breadcrumb-link {
    color: var(--text-light);
    transition: color var(--transition-fast);
}

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

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


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

.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;
}

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

.card-content {
    padding: var(--space-md);
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
    line-height: 1.3;
}

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

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

.card-excerpt {
    color: var(--text-light);
    margin-bottom: var(--space-sm);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.card-meta {
    display: flex;
    gap: var(--space-md);
    color: var(--text-lighter);
    font-size: 0.875rem;
    flex-wrap: wrap;
}

.card-category {
    position: absolute;
    top: var(--space-sm);
    left: var(--space-sm);
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    z-index: 1;
}


.tag {
    display: inline-block;
    padding: 0.375rem 0.75rem;
    background-color: var(--bg-light);
    color: var(--text-color);
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.tag:hover {
    background-color: var(--border-color);
    color: var(--text-color);
}

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

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

.tag-secondary {
    background-color: var(--secondary-color);
    color: white;
}

.tag-success {
    background-color: var(--success-color);
    color: white;
}

.tag-warning {
    background-color: var(--warning-color);
    color: white;
}

.tag-danger {
    background-color: var(--danger-color);
    color: white;
}


.custom-select {
    position: relative;
    display: inline-block;
}

.filter-select {
    appearance: none;
    padding: 0.5rem 2rem 0.5rem 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--bg-color);
    font-size: 0.875rem;
    cursor: pointer;
    min-width: 150px;
    transition: all var(--transition-fast);
}

.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;
    top: 50%;
    right: 0.75rem;
    transform: translateY(-50%);
    width: 0;
    height: 0;
    border-left: 5px solid transparent;
    border-right: 5px solid transparent;
    border-top: 5px solid var(--text-light);
    pointer-events: none;
}


.pagination {
    display: flex;
    justify-content: center;
    margin: var(--space-xl) 0;
}

.pagination-list {
    margin: 30px 0;
    display: flex;
    list-style: none;
    gap: var(--space-xs);
    align-items: center;
}

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

.pagination-link:hover:not(.active) {
    background-color: var(--bg-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

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

.pagination-link.prev,
.pagination-link.next {
    gap: var(--space-xs);
}

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


.back-to-top {
    position: fixed;
    bottom: var(--space-lg);
    right: var(--space-lg);
    width: 48px;
    height: 48px;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    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);
}

.back-to-top svg {
    fill: white;
    width: 24px;
    height: 24px;
}


.site-footer {
    background-color: #111827;
    color: #d1d5db;
}

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

.footer-logo {
    font-size: 1.75rem;
    font-weight: 800;
    color: white;
    margin-bottom: var(--space-sm);
    display: inline-block;
}

.footer-description {
    margin-bottom: var(--space-md);
    font-size: 0.875rem;
    line-height: 1.6;
}

.social-links {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.social-link {
    color: #9ca3af;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.social-link:hover {
    color: white;
}

.footer-title {
    color: white;
    font-size: 1.125rem;
    margin-bottom: var(--space-md);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: #9ca3af;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

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

.footer-text {
    margin-bottom: var(--space-md);
    font-size: 0.875rem;
    line-height: 1.6;
}

.subscribe-form .form-group {
    margin-bottom: var(--space-sm);
}

.subscribe-form .form-input {
    background-color: #1f2937;
    border-color: #374151;
    color: white;
}

.subscribe-form .form-input:focus {
    border-color: var(--primary-color);
}

.footer-bottom {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px 0;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.copyright a{
    font-size: 0.875rem;
    color: #9ca3af;
}

.footer-legal {
    display: flex;
    gap: var(--space-md);
}

.footer-legal a {
    color: #9ca3af;
    font-size: 0.875rem;
    transition: color var(--transition-fast);
}

.footer-legal a:hover {
    color: white;
}


.top-announcement {
    background-color: var(--primary-color);
    color: white;
    padding: 0.75rem 0;
    margin-top: var(--header-height);
}

.announcement-banner {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.announcement-tag {
    background-color: rgba(255, 255, 255, 0.2);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-weight: 600;
    font-size: 0.75rem;
}

.announcement-text {
    margin: 0;
    font-size: 0.875rem;
}

.announcement-link {
    color: white;
    font-weight: 600;
    text-decoration: underline;
    margin-left: var(--space-xs);
}

.announcement-link:hover {
    color: rgba(255, 255, 255, 0.9);
}


.section-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.section-title {
    font-size: 1.75rem;
    margin-bottom: 0;
}

.section-subtitle {
    color: var(--text-light);
    margin-bottom: 0;
    width: 100%;
    font-size: 1rem;
}

.section-link {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 0.875rem;
}


.featured-news {
    padding: var(--space-xl) 0;
    margin-top: 50px;
}

.featured-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

.main-featured {
    grid-row: span 2;
}

.secondary-featured {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

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

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


.categories-section {
    padding: var(--space-xl) 0;
    background-color: var(--bg-light);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-md);
}

.category-card {
    background-color: var(--bg-color);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
    display: block;
    text-align: center;
}

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

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

.category-icon svg {
    fill: var(--primary-color);
    width: 32px;
    height: 32px;
}

.category-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
}

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

.category-count {
    display: inline-block;
    background-color: var(--bg-lighter);
    color: var(--text-light);
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.75rem;
    font-weight: 600;
}


.latest-news {
    padding: var(--space-xl) 0;
}

.section-filters {
    display: flex;
    align-items: center;
    justify-content: flex-end;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

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

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.view-all-container {
    text-align: center;
    margin-top: var(--space-lg);
}


.special-features {
    padding: var(--space-xl) 0;
    background-color: var(--bg-light);
}

.features-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-lg);
}

.large-feature {
    grid-row: span 3;
}

.small-features {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.feature-card {
    background-color: var(--bg-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

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

.large-feature .card-image {
    aspect-ratio: 4/3;
}

.card-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent 0%, rgba(0, 0, 0, 0.5) 100%);
    display: flex;
    align-items: flex-end;
    padding: var(--space-md);
}

.card-tag {
    background-color: var(--warning-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.small-card {
    padding: var(--space-md);
}

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


.trending-topics {
    padding: var(--space-xl) 0;
}

.tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}

.trending-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}

.trending-card {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md);
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.trending-card:hover {
    background-color: var(--bg-lighter);
}

.trending-rank {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    font-weight: 700;
    font-size: 0.875rem;
    flex-shrink: 0;
}

.trending-content {
    flex: 1;
}

.trending-title {
    font-size: 1rem;
    margin-bottom: var(--space-xs);
    line-height: 1.4;
}

.trending-title a {
    color: var(--text-color);
}

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

.trending-meta {
    display: flex;
    gap: var(--space-md);
    font-size: 0.875rem;
    color: var(--text-light);
}


.tech-briefs {
    padding: var(--space-xl) 0;
    background-color: var(--bg-light);
}

.briefs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--space-md);
}

.brief-card {
    background-color: var(--bg-color);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    display: flex;
    gap: var(--space-md);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

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

.brief-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-lighter);
    border-radius: 50%;
}

.brief-content {
    flex: 1;
}

.brief-title {
    font-size: 1rem;
    margin-bottom: var(--space-xs);
    line-height: 1.3;
}

.brief-text {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: var(--space-xs);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.5;
}

.brief-time {
    color: var(--text-lighter);
    font-size: 0.75rem;
}


.category-page {
    padding-top: calc(var(--header-height) + 1rem);
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-lg);
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: var(--space-lg);
}

.page-header-content {
    flex: 1;
    min-width: 300px;
}

.page-title {
    font-size: 2.5rem;
    margin-bottom: var(--space-sm);
    color: var(--text-color);
}

.page-description {
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: var(--space-md);
    max-width: 800px;
    line-height: 1.6;
}

.page-stats {
    display: flex;
    gap: var(--space-lg);
    margin-top: var(--space-md);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.stat-number {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: 0.25rem;
}

.page-header-image {
    width: 300px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.page-header-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    aspect-ratio: 4/3;
}

.filters-section {
    background-color: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    margin-bottom: var(--space-lg);
}

.filters-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    align-items: center;
}

.filter-tags {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex-wrap: wrap;
}

.filter-tags .tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}


.content-layout {
    display: grid;
    grid-template-columns: 66% 30%;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.articles-list {
    width: 100%;
}

.articles-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}


.article-card {
    background-color: var(--bg-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

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

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

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

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

.article-badge {
    position: absolute;
    top: var(--space-sm);
    right: var(--space-sm);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    z-index: 2;
}

.article-badge.featured {
    background-color: var(--warning-color);
    color: white;
}

.article-badge.new {
    background-color: var(--success-color);
    color: white;
}

.article-badge.trending {
    background-color: var(--danger-color);
    color: white;
}

.article-content {
    padding: var(--space-md);
}

.article-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-sm);
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.article-category {
    background-color: var(--bg-lighter);
    color: var(--primary-color);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.article-date {
    color: var(--text-lighter);
    font-size: 0.875rem;
}
.article-title {
    font-size: 1.8rem;
    margin-bottom: var(--space-sm);
    line-height: 1.3;
}
.article-card-title {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
    line-height: 1.3;
}

.article-card-title a {
    color: var(--text-color);
}

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

.article-excerpt {
    color: var(--text-light);
    margin-bottom: var(--space-md);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.5;
}

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

.article-author {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.article-author img {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

.article-author span {
    font-size: 0.875rem;
    font-weight: 500;
}

.article-stats {
    display: flex;
    gap: var(--space-md);
    color: var(--text-lighter);
    font-size: 0.875rem;
}


.article-card.horizontal-card {
    display: grid;
    grid-template-columns: 260px 1fr;
}

.article-card.horizontal-card .article-image {
    aspect-ratio: 4/3;
    height: 100%;
    width: 100%;
}


.article-card.compact-card {
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
}

.article-card.compact-card:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}


.sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

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

.widget-title {
    font-size: 1.125rem;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--bg-lighter);
}

.widget-description {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: var(--space-md);
    line-height: 1.5;
}


.recommended-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

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

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

.recommended-title {
    font-size: 0.95rem;
    margin-bottom: var(--space-xs);
    line-height: 1.4;
}

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

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

.recommended-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-light);
}


.tags-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
}

.tag.large {
    padding: 0.5rem 0.75rem;
    font-size: 0.875rem;
}

.latest-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.latest-item {
    display: flex;
    gap: var(--space-sm);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--border-color);
}

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

.latest-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--bg-lighter);
    border-radius: 50%;
}

.latest-content {
    flex: 1;
}

.latest-title {
    font-size: 0.875rem;
    margin-bottom: 0.25rem;
    line-height: 1.3;
}

.latest-title a {
    color: var(--text-color);
}

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

.latest-time {
    color: var(--text-lighter);
    font-size: 0.75rem;
}

.categories-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.category-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.category-link:hover {
    background-color: var(--bg-lighter);
    color: var(--text-color);
    transform: translateX(4px);
}

.category-name {
    font-weight: 500;
    font-size: 0.875rem;
}

.category-count {
    color: var(--text-light);
    font-size: 0.75rem;
    background-color: var(--bg-lighter);
    padding: 0.25rem 0.5rem;
    border-radius: 1rem;
}


.pagination-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
    padding-top: var(--space-md);
    border-top: 1px solid var(--border-color);
}

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

.pagination-jump {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

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

.custom-select.small {
    min-width: 80px;
}

.custom-select.small .filter-select {
    padding: 0.375rem 1.5rem 0.375rem 0.5rem;
    font-size: 0.875rem;
}


.article-detail-page {
    padding-top: calc(var(--header-height) + 1rem);
}


.article-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.article-meta-main {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.article-category-tag {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.article-date-read {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    color: var(--text-light);
    font-size: 0.875rem;
}

.article-subtitle {
    font-size: 1.25rem;
    color: var(--text-light);
    margin-bottom: var(--space-lg);
    line-height: 1.5;
}

.article-author-info {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
    padding: var(--space-md);
    background-color: var(--bg-light);
    border-radius: var(--radius-lg);
}

.author-avatar img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
}

.author-details {
    flex: 1;
}

.author-name {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.author-verification {
    color: var(--primary-color);
    font-size: 1rem;
}

.author-bio {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: var(--space-xs);
    line-height: 1.5;
}

.author-social {
    display: flex;
    gap: var(--space-md);
}

.author-social-link {
    font-size: 0.75rem;
    color: var(--text-light);
    transition: color var(--transition-fast);
}

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

.article-featured-image {
    margin: 0 0 var(--space-lg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.article-featured-image img {
    width: 100%;
    height: auto;
    aspect-ratio: 3/2;
    object-fit: cover;
}


.article-body {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--text-color);
}

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

.article-lead {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text-color);
    line-height: 1.6;
    margin-bottom: var(--space-lg);
}

.article-summary {
    background-color: var(--bg-light);
    border-left: 4px solid var(--primary-color);
    padding: var(--space-md);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin-bottom: var(--space-lg);
}

.summary-title {
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--primary-color);
}

.summary-list {
    padding-left: var(--space-md);
}

.summary-list li {
    margin-bottom: var(--space-xs);
    color: var(--text-color);
}


.article-quote {
    margin: var(--space-lg) 0;
    padding: var(--space-lg);
    background-color: var(--bg-light);
    border-radius: var(--radius-lg);
    border-left: 4px solid var(--primary-color);
}

.article-quote blockquote {
    margin: 0;
    font-size: 1.25rem;
    line-height: 1.5;
    color: var(--text-color);
    font-style: italic;
}

.article-quote cite {
    display: block;
    margin-top: var(--space-sm);
    font-style: normal;
    color: var(--text-light);
    font-size: 0.875rem;
}


.article-image-inline {
    margin: var(--space-lg) 0;
}

.article-image-inline img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}


.article-info-box {
    background-color: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-md);
    margin: var(--space-lg) 0;
}

.info-box-title {
    font-weight: 600;
    margin-bottom: var(--space-sm);
    color: var(--primary-color);
    font-size: 1.125rem;
}

.info-box-content {
    font-size: 1rem;
}


.article-timeline {
    margin: var(--space-lg) 0;
}

.timeline-item {
    display: flex;
    margin-bottom: var(--space-lg);
    position: relative;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-year {
    width: 100px;
    flex-shrink: 0;
    font-weight: 600;
    color: var(--primary-color);
    font-size: 1.125rem;
}

.timeline-content {
    flex: 1;
    padding-left: var(--space-md);
    position: relative;
}

.timeline-content::before {
    content: '';
    position: absolute;
    left: -6px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--border-color);
}

.timeline-item:last-child .timeline-content::before {
    bottom: auto;
    height: 1.5rem;
}

.timeline-content::after {
    content: '';
    position: absolute;
    left: -10px;
    top: 0.5rem;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--primary-color);
    border: 2px solid white;
    box-shadow: 0 0 0 2px var(--primary-color);
}

.timeline-content h4 {
    margin-bottom: var(--space-xs);
    font-size: 1.125rem;
}


.article-comparison {
    margin: var(--space-lg) 0;
}

.comparison-title {
    font-weight: 600;
    margin-bottom: var(--space-md);
    font-size: 1.25rem;
    color: var(--text-color);
}

.comparison-table {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.comparison-header {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    background-color: var(--bg-light);
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
}

.comparison-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    border-bottom: 1px solid var(--border-color);
}

.comparison-row:last-child {
    border-bottom: none;
}

.comparison-row.highlight {
    background-color: rgba(37, 99, 235, 0.05);
}

.comparison-cell {
    padding: var(--space-sm);
    border-right: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    font-size: 0.875rem;
}

.comparison-cell:last-child {
    border-right: none;
}

.comparison-header .comparison-cell {
    padding: var(--space-sm);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.article-conclusion {
    background-color: var(--bg-light);
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    margin: var(--space-lg) 0;
    border-left: 4px solid var(--success-color);
}

.article-conclusion h3 {
    color: var(--success-color);
    margin-top: 0;
}


.article-footer {
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-color);
    margin-top: var(--space-lg);
}

.article-tags {
    margin-bottom: var(--space-lg);
}

.tags-label {
    font-weight: 500;
    margin-right: var(--space-sm);
    color: var(--text-color);
}

.article-meta-secondary {
    background-color: var(--bg-light);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.meta-item {
    display: flex;
    margin-bottom: var(--space-xs);
    font-size: 0.875rem;
    line-height: 1.5;
}

.meta-item:last-child {
    margin-bottom: 0;
}

.meta-label {
    font-weight: 500;
    min-width: 80px;
    color: var(--text-color);
}

.meta-value {
    color: var(--text-light);
    flex: 1;
}


.article-share {
    background-color: var(--bg-lighter);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
}

.share-title {
    font-weight: 500;
    margin-bottom: var(--space-sm);
    color: var(--text-color);
}

.share-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.share-btn {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 0.5rem 1rem;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-color);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.share-icon {
    font-size: 1rem;
}


.author-card-large {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background-color: var(--bg-light);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    margin-bottom: var(--space-lg);
}

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

.author-content {
    flex: 1;
}

.author-header {
    margin-bottom: var(--space-sm);
}

.author-name {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
}

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

.author-bio-full {
    margin-bottom: var(--space-md);
    color: var(--text-color);
    line-height: 1.6;
}

.author-links {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.author-link {
    font-size: 0.875rem;
    color: var(--primary-color);
    font-weight: 500;
    transition: color var(--transition-fast);
}

.author-link:hover {
    text-decoration: underline;
}


.related-articles {
    margin-top: var(--space-xl);
}

.related-title {
    font-size: 1.75rem;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-sm);
    border-bottom: 2px solid var(--bg-lighter);
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--space-lg);
}

.related-card {
    background-color: var(--bg-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-base);
}

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

.related-image {
    aspect-ratio: 4/3;
    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: var(--space-md);
}

.related-card-title {
    font-size: 1.125rem;
    margin-bottom: var(--space-sm);
    line-height: 1.3;
}

.related-card-title a {
    color: var(--text-color);
}

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

.related-card-excerpt {
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: var(--space-sm);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.5;
}

.related-card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-light);
}


.comments-section {
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border-color);
}

.comments-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.comments-title {
    font-size: 1.75rem;
    margin-bottom: 0;
}

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

.form-title {
    font-size: 1.5rem;
    margin-bottom: var(--space-xs);
}

.form-subtitle {
    color: var(--text-light);
    margin-bottom: var(--space-lg);
    font-size: 0.875rem;
}

.comment-form-fields .form-row {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.comment-form-fields .form-group {
    margin-bottom: var(--space-md);
}

.comment-form-fields .half {
    flex: 1;
}

.form-actions {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
}


.comments-list {
    margin-bottom: var(--space-lg);
}

.comment {
    padding: var(--space-lg);
    border-bottom: 1px solid var(--border-color);
}

.comment:last-child {
    border-bottom: none;
}

.comment-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--space-md);
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.comment-author {
    display: flex;
    gap: var(--space-sm);
    align-items: center;
}

.comment-avatar img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
}

.comment-author-details {
    flex: 1;
}

.comment-author-name {
    font-weight: 600;
    font-size: 0.875rem;
}

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

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

.comment-body {
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

.comment-body p {
    margin-bottom: var(--space-sm);
}

.comment-body p:last-child {
    margin-bottom: 0;
}

.comment-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.comment-actions {
    display: flex;
    gap: var(--space-md);
}

.comment-action {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    background: none;
    border: none;
    color: var(--text-light);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
}

.comment-action:hover {
    background-color: var(--bg-light);
    color: var(--text-color);
}

.action-icon {
    font-size: 1rem;
}


.comment-replies {
    margin-left: var(--space-xl);
    margin-top: var(--space-lg);
    padding-left: var(--space-lg);
    border-left: 2px solid var(--bg-lighter);
}

.reply-comment {
    padding: var(--space-md);
    background-color: var(--bg-light);
    border-radius: var(--radius-md);
    border: none;
}


.table-of-contents {
    border-left: 4px solid var(--primary-color);
    padding-left: var(--space-md);
}

.toc-nav {
    margin-top: var(--space-sm);
}

.toc-list {
    list-style: none;
}

.toc-item {
    margin-bottom: var(--space-sm);
}

.toc-link {
    color: var(--text-color);
    font-size: 0.875rem;
    transition: all var(--transition-fast);
    display: block;
    padding: 0.25rem 0;
}

.toc-link:hover {
    color: var(--primary-color);
    padding-left: var(--space-xs);
}


@media (max-width: 1200px) {
    .container {
        max-width: 100%;
        padding: 0 var(--space-lg);
    }
}

@media (max-width: 1024px) {

    .featured-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }

    .main-featured,
    .large-feature {
        grid-row: auto;
    }

    .content-layout {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }


    .article-card.horizontal-card {
        grid-template-columns: 150px 1fr;
    }

    .page-header {
        flex-direction: column;
    }

    .page-header-image {
        width: 100%;
        max-width: 400px;
    }
}

@media (max-width: 768px) {
    .site-header {
        position: relative;
    }

    .featured-news {
        margin-top: 0;
        padding-top: 0;
    }

    .content-layout {
        grid-template-columns: 100%;
    }

    .category-page {
        padding-top: 0;
    }

    .breadcrumb-list {
        padding-left: 0;
        margin: 0;
    }

    .page-header {
        padding-bottom: 10px;
        margin: 0;
    }

    .article-detail-page {
        padding-top: 0;
    }

    .pagination-list {
        flex-wrap: wrap;
        padding-left: 0;
    }

    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.75rem;
    }

    h3 {
        font-size: 1.25rem;
    }

    h4 {
        font-size: 1.125rem;
    }

    .container {
        padding: 0 var(--space-md);
    }


    .nav-menu {
        position: fixed;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background-color: var(--bg-color);
        flex-direction: column;
        align-items: stretch;
        padding: var(--space-md);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
        z-index: 999;
        max-height: calc(100vh - var(--header-height));
        overflow-y: auto;
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-list {
        flex-direction: column;
        margin-right: 0;
        margin-bottom: var(--space-md);
        width: 100%;
    }

    .nav-item {
        margin-left: 0;
        margin-bottom: var(--space-sm);
    }

    .nav-link::after {
        display: none;
    }

    .dropdown-menu {
        position: static;
        width: 100%;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        display: none;
        border: none;
        background-color: var(--bg-light);
    }

    .nav-item:hover .dropdown-menu {
        display: block;
    }

    .hamburger {
        display: flex;
    }


    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-sm);
    }

    .section-filters {
        width: 100%;
        justify-content: flex-start;
    }

    .filter-group {
        width: 100%;
    }

    .filter-select {
        flex: 1;
    }


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

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

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


    .filters-container {
        flex-direction: column;
        align-items: flex-start;
    }

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

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

    .pagination-info {
        flex-direction: column;
        align-items: flex-start;
    }


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

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

    .article-author-info {
        flex-direction: column;
        text-align: center;
    }

    .author-avatar {
        align-self: center;
    }

    .author-social {
        justify-content: center;
    }

    .author-card-large {
        flex-direction: column;
        text-align: center;
    }

    .author-avatar-large {
        align-self: center;
    }

    .author-links {
        justify-content: center;
    }

    .comment-form-fields .form-row {
        flex-direction: column;
        gap: var(--space-sm);
    }

    .comments-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .comments-sort {
        width: 100%;
    }

    .comparison-header,
    .comparison-row {
        grid-template-columns: 1fr;
    }

    .comparison-cell {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .comparison-cell:last-child {
        border-bottom: none;
    }

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

    .timeline-year {
        width: auto;
        margin-bottom: var(--space-xs);
    }

    .timeline-content {
        padding-left: 0;
    }

    .timeline-content::before,
    .timeline-content::after {
        display: none;
    }

    .comment-replies {
        margin-left: var(--space-md);
        padding-left: var(--space-md);
    }


    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-legal {
        margin-top: var(--space-sm);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-sm);
    }

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

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

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

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

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

    .form-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

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

    .back-to-top {
        bottom: var(--space-md);
        right: var(--space-md);
        width: 40px;
        height: 40px;
    }

    .back-to-top svg {
        width: 20px;
        height: 20px;
    }
}


@media print {

    .site-header,
    .site-footer,
    .sidebar,
    .back-to-top,
    .comments-section,
    .article-share,
    .related-articles {
        display: none;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
        color: #000;
        background: #fff;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }

    .article-body {
        font-size: 12pt;
    }

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

    .article-featured-image img {
        max-width: 100%;
        height: auto;
    }
}