/* CSS Variables */
:root {
    --primary-color: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary-color: #64748b;
    --accent-color: #f59e0b;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-light: #94a3b8;
    
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-secondary: 'Georgia', serif;
    
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    
    --container-max-width: 1200px;
    --header-height: 80px;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
}

.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 1rem;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    margin-bottom: 0.5rem;
}

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: 1rem;
}

a {
    color: var(--primary-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    white-space: nowrap;
}

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

.btn-secondary:hover {
    background-color: #475569;
    color: white;
}

.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;
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1rem;
}

.btn-xl {
    padding: 1.25rem 2.5rem;
    font-size: 1.125rem;
}

/* Header */
.header {
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.navbar {
    height: var(--header-height);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-logo i {
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 2rem;
}

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

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

.nav-link.btn-cta {
    background-color: var(--primary-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
}

.dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    list-style: none;
    padding: 0.5rem 0;
}

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

.dropdown-menu li {
    margin: 0;
}

.dropdown-menu a {
    display: block;
    padding: 0.5rem 1rem;
    color: var(--text-primary);
    transition: background-color 0.2s ease;
}

.dropdown-menu a:hover {
    background-color: var(--bg-secondary);
    color: var(--primary-color);
}

/* Mobile Navigation */
.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

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

.hamburger.active .bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.hamburger.active .bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    transition: 0.3s;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, white 100%);
    padding: 4rem 0;
    min-height: 80vh;
    display: flex;
    align-items: center;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    line-height: 1.1;
}

.highlight {
    color: var(--primary-color);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.hero-features {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

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

.feature-item i {
    color: var(--success-color);
}

.hero-cta {
    display: flex;
    gap: 1rem;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

.hero-icon {
    font-size: 8rem;
    color: var(--primary-color);
    opacity: 0.1;
}

.floating-icons {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.floating-icons i {
    position: absolute;
    font-size: 2rem;
    color: var(--primary-color);
    opacity: 0.3;
    animation: float 3s ease-in-out infinite;
}

.floating-icons i:nth-child(1) { top: 20%; left: 20%; animation-delay: 0s; }
.floating-icons i:nth-child(2) { top: 30%; right: 20%; animation-delay: 1s; }
.floating-icons i:nth-child(3) { bottom: 30%; left: 30%; animation-delay: 2s; }
.floating-icons i:nth-child(4) { bottom: 20%; right: 30%; animation-delay: 1.5s; }

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

/* Sections */
.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Products Section */
.products {
    padding: 4rem 0;
    background-color: var(--bg-secondary);
}

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

.product-card {
    background-color: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    position: relative;
    border: 1px solid var(--border-light);
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.product-card.featured {
    border: 2px solid var(--primary-color);
}

.product-badge {
    position: absolute;
    top: -10px;
    right: 20px;
    background-color: var(--primary-color);
    color: white;
    padding: 0.25rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
}

.product-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    text-align: center;
}

.product-title {
    text-align: center;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.product-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    text-align: center;
}

.product-features {
    list-style: none;
    margin-bottom: 2rem;
}

.product-features li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.product-features i {
    color: var(--success-color);
}

.product-card .btn {
    width: 100%;
    justify-content: center;
}

/* Trust Section */
.trust {
    padding: 4rem 0;
    background-color: var(--bg-primary);
}

.trust-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
    text-align: center;
}

.stat-item {
    padding: 1.5rem;
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

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

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

.trust-feature {
    display: flex;
    gap: 1rem;
    padding: 1.5rem;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-lg);
}

.trust-feature i {
    font-size: 2rem;
    color: var(--primary-color);
    flex-shrink: 0;
    margin-top: 0.25rem;
}

/* Blog Section */
.blog-preview {
    padding: 4rem 0;
    background-color: var(--bg-secondary);
}

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

.blog-cta {
    text-align: center;
}

/* CTA Section */
.cta-section {
    padding: 4rem 0;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
}

.cta-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 3rem;
    align-items: center;
}

.cta-title {
    color: white;
    margin-bottom: 1rem;
}

.cta-subtitle {
    font-size: 1.125rem;
    margin-bottom: 1.5rem;
    opacity: 0.9;
}

.cta-features {
    display: flex;
    gap: 2rem;
}

.cta-feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    opacity: 0.9;
}

.cta-actions {
    text-align: center;
}

.cta-contact {
    margin-top: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
    opacity: 0.9;
}

/* Article Styles */
.article-content {
    max-width: 800px;
}

.content-wrapper {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 3rem;
    padding: 2rem 0;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

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

.article-title {
    margin-bottom: 1rem;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

.article-featured-icon {
    text-align: center;
    margin-bottom: 2rem;
}

.article-featured-icon i {
    font-size: 4rem;
    color: var(--primary-color);
    opacity: 0.7;
}

.article-body {
    line-height: 1.8;
}

.article-body h2,
.article-body h3,
.article-body h4 {
    margin: 2rem 0 1rem 0;
    color: var(--text-primary);
}

.article-body ul,
.article-body ol {
    margin: 1rem 0;
    padding-left: 2rem;
}

.article-body blockquote {
    border-left: 4px solid var(--primary-color);
    padding-left: 1rem;
    margin: 1.5rem 0;
    font-style: italic;
    color: var(--text-secondary);
}

.article-footer {
    border-top: 1px solid var(--border-color);
    padding-top: 2rem;
    margin-top: 3rem;
}

.article-tags {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

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

.share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: white;
    transition: transform 0.2s ease;
}

.share-btn:hover {
    transform: scale(1.1);
}

.share-btn.facebook { background-color: #1877f2; }
.share-btn.twitter { background-color: #1da1f2; }
.share-btn.linkedin { background-color: #0077b5; }

/* Sidebar */
.sidebar {
    max-width: 300px;
}

.sidebar-widget {
    background-color: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    margin-bottom: 2rem;
}

.widget-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    font-size: 1.125rem;
    color: var(--text-primary);
}

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

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

.categories-list a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    transition: background-color 0.2s ease;
}

.categories-list a:hover {
    background-color: var(--bg-tertiary);
}

.cta-widget {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
}

.cta-widget .widget-title {
    color: white;
}

.cta-widget p {
    opacity: 0.9;
}

.newsletter-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

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

/* Category Page */
.category-header {
    padding: 2rem 0;
    background-color: var(--bg-secondary);
}

.category-title-section {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.category-icon {
    font-size: 4rem;
    color: var(--primary-color);
}

.category-stats {
    display: flex;
    gap: 1.5rem;
    margin-top: 1rem;
}

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

.articles-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
}

/* Footer */
.footer {
    background-color: var(--text-primary);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h4 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
    color: white;
}

.footer-section ul {
    list-style: none;
}

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

.footer-section a {
    color: #cbd5e1;
    transition: color 0.2s ease;
}

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

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

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    border-radius: 50%;
    color: white;
    transition: background-color 0.2s ease;
}

.social-links a:hover {
    background-color: var(--primary-dark);
}

.contact-info .contact-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    margin-bottom: 1rem;
    color: #cbd5e1;
}

.contact-item i {
    color: var(--primary-color);
    margin-top: 0.25rem;
    flex-shrink: 0;
}


/* Responsive Design */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .cta-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .cta-features {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: var(--header-height);
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: var(--shadow-lg);
        padding: 2rem 0;
        z-index: 999;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        margin: 1rem 0;
    }
    
    .dropdown-menu {
        position: static;
        box-shadow: none;
        border: none;
        background: var(--bg-secondary);
        opacity: 1;
        visibility: visible;
        transform: none;
        margin-top: 1rem;
    }
    
    .hamburger {
        display: flex;
    }
    
    .content-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-features {
        flex-direction: column;
        gap: 1rem;
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .trust-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .category-title-section {
        flex-direction: column;
        text-align: center;
    }
    
}

@media (max-width: 480px) {
    .container {
        padding: 0 0.75rem;
    }
    
    .hero {
        padding: 2rem 0;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .trust-stats {
        grid-template-columns: 1fr;
    }
    
    .products-grid,
    .blog-grid {
        grid-template-columns: 1fr;
    }
    
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
}

/* Form Styles */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.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-select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='m6 8 4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    padding-right: 2.5rem;
}

/* Article Cards */
.article-card {
    background-color: white;
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid var(--border-light);
    margin-bottom: 2rem;
}

.article-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.article-card .article-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.article-card .article-title {
    margin-bottom: 1rem;
}

.article-card .article-title a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.article-card .article-excerpt {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.article-card .article-meta {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

.article-card .read-more {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
}

.article-card .read-more:hover {
    color: var(--primary-dark);
    gap: 0.75rem;
}

/* Popular Articles Sidebar */
.popular-article {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-light);
}

.popular-article:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.popular-article-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.popular-article-content h4 {
    margin-bottom: 0.5rem;
    font-size: 0.95rem;
    line-height: 1.4;
}

.popular-article-content h4 a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.popular-article-content h4 a:hover {
    color: var(--primary-color);
}

.popular-article-meta {
    font-size: 0.75rem;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* Pagination */
.pagination-container {
    display: flex;
    justify-content: center;
    margin: 3rem 0;
}

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

.pagination-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.3s ease;
}

.pagination-item:hover,
.pagination-item.current {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.pagination-item.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}


/* Blog Cards */
.blog-card {
    background-color: white;
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid var(--border-light);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.blog-card-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    text-align: center;
}

.blog-card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    font-size: 0.875rem;
}

.blog-category {
    color: var(--primary-color);
    font-weight: 500;
    background-color: var(--bg-tertiary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
}

.blog-date {
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.blog-card-title {
    margin-bottom: 1rem;
    flex-grow: 1;
}

.blog-card-title a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.blog-card-excerpt {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    flex-grow: 1;
}

.blog-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1rem;
    border-top: 1px solid var(--border-light);
    margin-top: auto;
}

.blog-author {
    color: var(--text-secondary);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.blog-read-more {
    color: var(--primary-color);
    font-weight: 500;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.3s ease;
}

.blog-read-more:hover {
    color: var(--primary-dark);
    gap: 0.75rem;
}

@media (max-width: 768px) {
    .blog-card-meta {
        flex-direction: column;
        gap: 0.5rem;
        align-items: flex-start;
    }
    
    .blog-card-footer {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.hidden { display: none; }
.block { display: block; }
.flex { display: flex; }
.grid { display: grid; }

.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.gap-3 { gap: 1.5rem; }
.gap-4 { gap: 2rem; }

.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.rounded { border-radius: var(--radius-md); }
.rounded-lg { border-radius: var(--radius-lg); }

.shadow { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }

/* Contact Page Styles */
.contact-hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 3rem 0;
}

.contact-hero-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 3rem;
    align-items: center;
}

.contact-hero-title {
    color: white;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.contact-hero-subtitle {
    font-size: 1.125rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.contact-hero-features {
    display: flex;
    gap: 2rem;
}

.contact-hero-visual .contact-icon {
    font-size: 6rem;
    opacity: 0.3;
}

.contact-form-section {
    padding: 4rem 0;
    background-color: var(--bg-secondary);
}

.contact-content-wrapper {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 3rem;
}

.contact-form-container {
    background-color: white;
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.form-header {
    margin-bottom: 3rem;
    text-align: center;
}

.form-header h2 {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.form-section {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--border-light);
}

.form-section:last-child {
    border-bottom: none;
    margin-bottom: 0;
    padding-bottom: 0;
}

.form-section-title {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    color: var(--primary-color);
    font-size: 1.25rem;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.form-help {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.form-checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-checkbox {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    cursor: pointer;
    position: relative;
}

.form-checkbox input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    cursor: pointer;
}

.checkmark {
    display: inline-block;
    width: 20px;
    height: 20px;
    background-color: white;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    position: relative;
    flex-shrink: 0;
    margin-top: 2px;
    transition: all 0.3s ease;
}

.form-checkbox input[type="checkbox"]:checked + .checkmark {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.form-checkbox input[type="checkbox"]:checked + .checkmark::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 2px;
    width: 6px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

.form-checkbox small {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.75rem;
    color: var(--text-light);
}

.form-submit {
    text-align: center;
    margin-top: 3rem;
}

.form-submit-info {
    margin-top: 1rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

/* Contact Sidebar */
.contact-sidebar {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-info-card {
    background-color: white;
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.contact-info-card h3 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.contact-methods {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.contact-method {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.contact-method i {
    color: var(--primary-color);
    font-size: 1.25rem;
    margin-top: 0.25rem;
    flex-shrink: 0;
}

.contact-method div {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.contact-method strong {
    color: var(--text-primary);
}

.contact-method span {
    color: var(--text-secondary);
}

.contact-method small {
    color: var(--text-light);
    font-size: 0.75rem;
}

.guarantees-list {
    list-style: none;
    margin-top: 1rem;
}

.guarantees-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

.guarantees-list i {
    color: var(--success-color);
    flex-shrink: 0;
}

.delivery-times {
    margin-top: 1rem;
}

.delivery-time {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin-bottom: 1rem;
    padding: 1rem;
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.delivery-time strong {
    color: var(--primary-color);
}

.delivery-time span {
    color: var(--text-primary);
    font-weight: 500;
}

.delivery-time small {
    color: var(--text-light);
    font-size: 0.75rem;
}

/* Responsive Contact Page */
@media (max-width: 1024px) {
    .contact-content-wrapper {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .contact-hero-features {
        justify-content: center;
    }
    
    .contact-sidebar {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        display: grid;
    }
}

@media (max-width: 768px) {
    .contact-form-container {
        padding: 2rem;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .contact-hero-features {
        flex-direction: column;
        gap: 1rem;
    }
    
    .contact-sidebar {
        grid-template-columns: 1fr;
    }
}

/* Enhanced Category Page Styles */
.category-hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    padding: 4rem 0;
    position: relative;
    overflow: hidden;
}

.category-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
}

.category-hero-content {
    position: relative;
    z-index: 2;
}

.category-hero-main {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 4rem;
    align-items: center;
    margin-top: 2rem;
}

.category-hero-title {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.category-hero-subtitle {
    font-size: 1.25rem;
    opacity: 0.9;
    margin-bottom: 2rem;
    line-height: 1.6;
}

.category-hero-stats {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    justify-content: flex-start;
    align-items: center;
}

.stat-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.15);
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 0.875rem;
    font-weight: 500;
}

.hero-icons-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 1.5rem;
    padding: 2rem;
    max-width: 320px;
    margin: 0 auto;
    align-items: center;
    justify-items: center;
    opacity: 0.9;
}

.hero-icon-item {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
    animation: float 3s ease-in-out infinite;
}

.hero-icon-item:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.hero-icon-item i {
    font-size: 1.8rem;
    color: white;
}

.hero-icon-item:nth-child(1) { animation-delay: 0s; }
.hero-icon-item:nth-child(2) { animation-delay: 0.5s; }
.hero-icon-item:nth-child(3) { animation-delay: 1s; }
.hero-icon-item:nth-child(4) { animation-delay: 1.5s; }
.hero-icon-item:nth-child(5) { animation-delay: 2s; }
.hero-icon-item:nth-child(6) { animation-delay: 2.5s; }

.themed-content {
    padding: 4rem 0;
    background-color: var(--bg-secondary);
}

.content-section {
    margin-bottom: 4rem;
}

.content-section:last-child {
    margin-bottom: 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

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

.articles-grid-enhanced {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    align-items: stretch;
}

.article-card-enhanced {
    background: white;
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.4s ease;
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.article-card-enhanced::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    transform: scaleX(0);
    transition: transform 0.4s ease;
}

.article-card-enhanced:hover::before {
    transform: scaleX(1);
}

.article-card-enhanced:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.article-card-enhanced.featured {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
}

.article-card-enhanced.featured .article-title-enhanced a,
.article-card-enhanced.featured .article-excerpt-enhanced,
.article-card-enhanced.featured .article-meta-enhanced {
    color: white;
}

.article-card-enhanced.urgent {
    border: 2px solid var(--danger-color);
    background: linear-gradient(135deg, var(--danger-color) 0%, #dc2626 100%);
    color: white;
}

.article-card-enhanced.urgent .article-title-enhanced a,
.article-card-enhanced.urgent .article-excerpt-enhanced,
.article-card-enhanced.urgent .article-meta-enhanced {
    color: white;
}

.article-badge {
    position: absolute;
    top: -8px;
    right: 20px;
    background: var(--success-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-md);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.urgent-badge {
    background: var(--warning-color);
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.article-icon-enhanced {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    text-align: center;
}

.article-card-enhanced.featured .article-icon-enhanced,
.article-card-enhanced.urgent .article-icon-enhanced {
    color: white;
}

.article-title-enhanced {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.article-title-enhanced a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.article-excerpt-enhanced {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
    flex-grow: 1;
}

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

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

.article-card-enhanced.featured .tag {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.article-content-enhanced {
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.article-footer-enhanced {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-top: auto;
    padding-top: 1.5rem;
}

.article-meta-enhanced {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.article-meta-enhanced span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.btn-read-more {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary-color);
    color: white;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-md);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.875rem;
    transition: all 0.3s ease;
    border: none;
}

.btn-read-more:hover {
    background: var(--primary-dark);
    color: white;
    transform: translateX(3px);
    gap: 0.75rem;
}

.btn-read-more.urgent {
    background: var(--warning-color);
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from { box-shadow: 0 0 5px var(--warning-color); }
    to { box-shadow: 0 0 20px var(--warning-color), 0 0 30px var(--warning-color); }
}

.article-card-enhanced.featured .btn-read-more {
    background: white;
    color: var(--primary-color);
}

.article-card-enhanced.featured .btn-read-more:hover {
    background: var(--bg-secondary);
    color: var(--primary-dark);
}

.expertise-section {
    background: linear-gradient(135deg, var(--bg-tertiary) 0%, white 100%);
    padding: 4rem 2rem;
    border-radius: var(--radius-xl);
    margin: 4rem 0;
    border: 1px solid var(--border-light);
}

.expertise-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 3rem;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
}

.expertise-text h2 {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    font-size: 2rem;
}

.expertise-text p {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.expertise-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

.expertise-stat {
    text-align: center;
}

.expertise-stat strong {
    display: block;
    font-size: 2rem;
    color: var(--primary-color);
    font-weight: 700;
}

.expertise-stat span {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.expert-avatar {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: white;
    box-shadow: var(--shadow-lg);
}

/* Responsive Enhanced Design */
@media (max-width: 1024px) {
    .category-hero-main {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .expertise-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .expertise-stats {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .category-hero-title {
        font-size: 2rem;
    }
    
    .category-hero-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .stat-badge {
        justify-content: center;
    }
    
    .articles-grid-enhanced {
        grid-template-columns: 1fr;
    }
    
    .article-card-enhanced {
        padding: 2rem;
    }
    
    .article-footer-enhanced {
        flex-direction: column;
        gap: 1rem;
        align-items: stretch;
    }
    
    .expertise-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .hero-icons-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .category-hero {
        padding: 2rem 0;
    }
    
    .category-hero-title {
        font-size: 1.75rem;
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .themed-content {
        padding: 2rem 0;
    }
    
    .content-section {
        margin-bottom: 3rem;
    }
}

/* Enhanced Article Styles */
.article-intro {
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
    background: linear-gradient(45deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    padding: 3rem 2rem;
    box-shadow: 0 20px 40px rgba(102, 126, 234, 0.15);
}

.article-intro::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 200%;
    height: 200%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="2" fill="rgba(255,255,255,0.1)"/><circle cx="80" cy="20" r="1" fill="rgba(255,255,255,0.15)"/><circle cx="40" cy="60" r="1.5" fill="rgba(255,255,255,0.1)"/><circle cx="90" cy="70" r="1" fill="rgba(255,255,255,0.2)"/><circle cx="10" cy="80" r="1" fill="rgba(255,255,255,0.15)"/></svg>') repeat;
    animation: float-particles 20s linear infinite;
    pointer-events: none;
}

@keyframes float-particles {
    0% { transform: translateX(-100px) translateY(-100px); }
    100% { transform: translateX(100px) translateY(100px); }
}

.article-lead {
    font-size: 1.125rem;
    line-height: 1.7;
    color: white;
    margin: 0;
    position: relative;
    z-index: 1;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.article-toc {
    background: white;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-sm);
}

.article-toc h3 {
    margin-bottom: 1rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

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

.article-toc a {
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem;
    display: block;
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
}

.article-toc a:hover {
    background-color: var(--bg-secondary);
    color: var(--primary-color);
    padding-left: 1rem;
}

.article-body h2 {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-top: 3rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--border-light);
    color: var(--primary-color);
}

.article-body h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.article-highlight {
    position: relative;
    background: linear-gradient(135deg, #ff6b6b 0%, #ff8e8e 100%);
    border-radius: 15px;
    padding: 2rem;
    margin: 3rem 0;
    color: white;
    overflow: hidden;
    box-shadow: 0 15px 35px rgba(255, 107, 107, 0.2);
    transform: perspective(1000px) rotateX(2deg);
    transition: all 0.3s ease;
}

.article-highlight:hover {
    transform: perspective(1000px) rotateX(0deg) scale(1.02);
    box-shadow: 0 20px 40px rgba(255, 107, 107, 0.3);
}

.article-highlight::before {
    content: '⚠️';
    position: absolute;
    top: -10px;
    right: -10px;
    font-size: 4rem;
    opacity: 0.1;
    transform: rotate(15deg);
}

.article-highlight::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 20 20"><polygon points="10,0 12,8 20,8 14,12 16,20 10,16 4,20 6,12 0,8 8,8" fill="rgba(255,255,255,0.05)"/></svg>') repeat;
    background-size: 30px 30px;
    animation: sparkle 15s linear infinite;
    pointer-events: none;
}

@keyframes sparkle {
    0% { background-position: 0 0; }
    100% { background-position: 30px 30px; }
}

.article-highlight h4 {
    color: white;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    position: relative;
    z-index: 1;
}

.article-highlight p {
    position: relative;
    z-index: 1;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.article-tips {
    position: relative;
    background: linear-gradient(145deg, #00d2ff 0%, #3a7bd5 100%);
    border-radius: 25px;
    padding: 2.5rem;
    margin: 3rem 0;
    color: white;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 210, 255, 0.3);
    border: 3px solid rgba(255, 255, 255, 0.2);
}

.article-tips::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(from 0deg, transparent, rgba(255,255,255,0.1), transparent);
    animation: rotate-light 8s linear infinite;
    pointer-events: none;
}

@keyframes rotate-light {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.article-tips::after {
    content: '💡';
    position: absolute;
    bottom: 10px;
    right: 15px;
    font-size: 3rem;
    opacity: 0.15;
    animation: pulse-glow 2s ease-in-out infinite alternate;
}

@keyframes pulse-glow {
    0% { 
        opacity: 0.1;
        transform: scale(0.95);
    }
    100% { 
        opacity: 0.25;
        transform: scale(1.05);
    }
}

.article-tips h4 {
    color: white;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    position: relative;
    z-index: 1;
}

.article-tips h4 i {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.5rem;
    border-radius: 50%;
    font-size: 1rem;
}

.article-tips ul {
    margin: 0;
    padding: 0;
    list-style: none;
    position: relative;
    z-index: 1;
}

.article-tips li {
    margin-bottom: 1rem;
    line-height: 1.6;
    padding-left: 2rem;
    position: relative;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

.article-tips li::before {
    content: '✓';
    position: absolute;
    left: 0;
    top: 0;
    width: 1.5rem;
    height: 1.5rem;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 0.875rem;
    backdrop-filter: blur(10px);
}

/* Recommended Articles Section */
.recommended-articles {
    margin-top: 3rem;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border-top: 4px solid var(--primary-color);
}

.recommended-articles h3 {
    color: var(--primary-color);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
}

.recommended-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.recommended-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid var(--border-light);
    display: flex;
    gap: 1rem;
}

.recommended-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.recommended-icon {
    font-size: 2rem;
    color: var(--primary-color);
    display: flex;
    align-items: flex-start;
    padding-top: 0.25rem;
    flex-shrink: 0;
}

.recommended-content h4 {
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.recommended-content h4 a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.recommended-content h4 a:hover {
    color: var(--primary-color);
}

.recommended-content p {
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    font-size: 0.875rem;
    line-height: 1.5;
}

.recommended-category {
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Enhanced Sidebar */
.popular-article {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.popular-article:hover {
    background-color: var(--bg-secondary);
    border-color: var(--border-light);
}

.popular-article:not(:last-child) {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-light);
}

.popular-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
    display: flex;
    align-items: flex-start;
    padding-top: 0.25rem;
    flex-shrink: 0;
}

.popular-content h4 {
    margin-bottom: 0.5rem;
    font-size: 0.875rem;
    line-height: 1.4;
}

.popular-content h4 a {
    color: var(--text-primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.popular-content h4 a:hover {
    color: var(--primary-color);
}

.popular-meta {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.popular-meta span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

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

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

.categories-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.categories-list a:hover {
    background-color: var(--bg-secondary);
    color: var(--primary-color);
    border-color: var(--border-light);
}

.categories-list .count {
    font-size: 0.75rem;
    background: var(--bg-tertiary);
    color: var(--text-secondary);
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
}

.highlight-widget {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: white;
    border: none;
}

.highlight-widget .widget-title {
    color: white;
}

.expert-tip {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.expert-avatar {
    font-size: 2rem;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.expert-content p {
    margin-bottom: 0.75rem;
    line-height: 1.6;
}

.expert-content cite {
    font-style: italic;
    font-size: 0.875rem;
    opacity: 0.9;
}

/* Responsive Design for Article */
@media (max-width: 768px) {
    .recommended-grid {
        grid-template-columns: 1fr;
    }
    
    .recommended-card {
        flex-direction: column;
        text-align: center;
    }
    
    .popular-article {
        flex-direction: column;
        text-align: center;
    }
    
    .expert-tip {
        flex-direction: column;
        text-align: center;
    }
    
    .article-intro {
        padding: 1.5rem;
    }
    
    .article-toc {
        padding: 1.5rem;
    }
    
    .article-body h2 {
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
}