/* ===== RESET & BASE STYLES ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* ===== FONT FACES ===== */
@font-face {
    font-family: 'Alibaba PuHuiTi';
    src: url('/fonts/alibaba-puhuiti/AlibabaPuHuiTi-2.0-45-Light.woff2') format('woff2'),
         url('/fonts/alibaba-puhuiti/AlibabaPuHuiTi-2.0-45-Light.woff') format('woff');
    font-weight: 300;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'Alibaba PuHuiTi';
    src: url('/fonts/alibaba-puhuiti/AlibabaPuHuiTi-2.0-55-Regular.woff2') format('woff2'),
         url('/fonts/alibaba-puhuiti/AlibabaPuHuiTi-2.0-55-Regular.woff') format('woff');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'Alibaba PuHuiTi';
    src: url('/fonts/alibaba-puhuiti/AlibabaPuHuiTi-2.0-65-Medium.woff2') format('woff2'),
         url('/fonts/alibaba-puhuiti/AlibabaPuHuiTi-2.0-65-Medium.woff') format('woff');
    font-weight: 500;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'Alibaba PuHuiTi';
    src: url('/fonts/alibaba-puhuiti/AlibabaPuHuiTi-2.0-75-SemiBold.woff2') format('woff2'),
         url('/fonts/alibaba-puhuiti/AlibabaPuHuiTi-2.0-75-SemiBold.woff') format('woff');
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'Alibaba PuHuiTi';
    src: url('/fonts/alibaba-puhuiti/AlibabaPuHuiTi-2.0-85-Bold.woff2') format('woff2'),
         url('/fonts/alibaba-puhuiti/AlibabaPuHuiTi-2.0-85-Bold.woff') format('woff');
    font-weight: 700;
    font-style: normal;
    font-display: swap;
}
@font-face {
    font-family: 'Alibaba PuHuiTi';
    src: url('/fonts/alibaba-puhuiti/AlibabaPuHuiTi-2.0-95-ExtraBold.woff2') format('woff2'),
         url('/fonts/alibaba-puhuiti/AlibabaPuHuiTi-2.0-95-ExtraBold.woff') format('woff');
    font-weight: 800;
    font-style: normal;
    font-display: swap;
}

/* ===== GLOBAL STYLES ===== */
html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Alibaba PuHuiTi', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

/* ===== CONTAINER MAX WIDTH ===== */
.container {
    max-width: 1200px !important;
}

/* ===== RESPONSIVE CONTAINER PADDING ===== */
/* Large screens (≥1200px) */
@media (min-width: 1200px) {
    .container {
        padding-left: 2rem !important;
        padding-right: 2rem !important;
    }
}

/* Medium screens (768px-1199px) */
@media (min-width: 768px) and (max-width: 1199px) {
    .container {
        padding-left: 1.5rem !important;
        padding-right: 1.5rem !important;
    }
}

/* Small screens (576px-767px) */
@media (min-width: 576px) and (max-width: 767px) {
    .container {
        padding-left: 1.25rem !important;
        padding-right: 1.25rem !important;
    }
}

/* Extra small screens (<576px) */
@media (max-width: 575px) {
    .container {
        padding-left: 1rem !important;
        padding-right: 1rem !important;
    }
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1rem;
}

h1 { font-size: 2rem; }
h2 { font-size: 1.8rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: 1rem;
}

/* ===== HEADER STYLES ===== */
.site-header {
    background: #fff;
    border-bottom: 1px solid rgba(21, 26, 39, 0.06);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
}

.navbar-brand {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: #163139 !important;
    text-decoration: none;
}

.brand-text {
    font-family: 'Permanent Marker', 'Alibaba PuHuiTi', cursive, sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    color: #163139;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.1);
}

.brand-text--primary {
    color: #163139;
    letter-spacing: -0.02em;
}

.brand-text--accent {
    color: #34C792;
    font-weight: 700;
    letter-spacing: -0.03em;
}

.navbar-nav .nav-link {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-weight: 500;
    color: #163139 !important;
    margin: 0 0.5rem;
    transition: color 0.2s ease;
}

.navbar-nav .nav-link:hover,
.navbar-nav .nav-link.nav-link--active {
    color: #34C792 !important;
}

.language-switch {
    display: flex;
    background: white;
    border: 1px solid #34C792;
    border-radius: 29px;
    overflow: hidden;
    width: 120px;
    flex-shrink: 0;
}

.lang-btn {
    background: none;
    border: none;
    padding: 6px 0;
    width: 60px;
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-weight: 600;
    font-size: 16px;
    line-height: 1.4;
    letter-spacing: -0.01em;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    color: #163139;
    flex: 1;
}

.lang-btn--active {
    background: #34C792;
    color: white;
}

.navbar-toggler {
    border: none;
    padding: 0.25rem 0.5rem;
}

.navbar-toggler:focus {
    box-shadow: none;
}

/* ===== BANNER SECTION ===== */
.banner {
    background: #34C792;
    color: white;
    position: relative;
    overflow: hidden;
}

.banner .container {
    padding-top: 80px;
}

/* Mobile banner spacing fix */
@media (max-width: 768px) {
    .banner .container {
        padding-top: 60px;
        padding-bottom: 0;
        display: flex;
        flex-direction: column;
        min-height: calc(100vh - 120px);
    }
    
    /* Mobile banner layout - image at bottom */
    .banner .row {
        flex: 1;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
    }
    
    .banner .col-lg-6:first-child {
        flex-shrink: 0;
    }
    
    .banner .col-lg-6:last-child {
        flex: 1;
        display: flex;
        align-items: flex-end;
        justify-content: center;
        margin-top: 2rem;
    }
    
    .banner .col-lg-6:last-child img {
        max-height: 60vh;
        width: auto;
        object-fit: contain;
    }
}

@media (max-width: 576px) {
    .banner .container {
        padding-top: 40px;
        min-height: calc(100vh - 100px);
    }
    
    .banner .col-lg-6:last-child img {
        max-height: 50vh;
    }
}

.banner img {
    max-height: 400px;
    width: auto;
    object-fit: contain;
    object-position: bottom;
}

.banner-title {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: clamp(2.25rem, 4.5vw, 3.75rem);
    font-weight: 900;
    line-height: 1.33;
    margin-bottom: 1.5rem;
}

.banner-description {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 1.125rem;
    font-weight: 400;
    line-height: 1.78;
    margin-bottom: 3.5rem;
}

.download-buttons {
    padding-bottom: 40px;
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    border-radius: 0.75rem;
    background: #1C1D1E;
    color: #fff;
    text-decoration: none;
    width: 11.375rem;
    transition: transform 0.2s ease;
}

.download-btn:hover {
    transform: translateY(-2px);
    color: #fff;
}

.download-btn--disabled {
    opacity: 0.7;
    cursor: not-allowed;
    pointer-events: none;
}

.download-text {
    display: flex;
    flex-direction: column;
}

.download-title {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 1.125rem;
    font-weight: 600;
}

.download-sub {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 0.875rem;
    font-weight: 400;
    opacity: 0.8;
}

/* ===== FEATURES SECTION ===== */
.product-features {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: #163139;
    margin-bottom: 1rem;
}

.section-header p {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 1.125rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* Override for left-aligned section headers */
.section-header.text-start p {
    margin: 0;
    text-align: left;
}

.feature-section {
    margin-bottom: 5rem;
    padding: 2em;
}

.feature-text {
    padding: 2rem 0;
}

.feature-title {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    color: #163139;
    margin-bottom: 1.5rem;
}

.feature-description {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 1.125rem;
    line-height: 1.7;
    color: #666;
    margin-bottom: 2rem;
}

.feature-list {
    list-style: none;
    padding: 0;
}

.feature-list li {
    position: relative;
    padding-left: 2rem;
    margin-bottom: 1rem;
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 1rem;
    line-height: 1.6;
    color: #333;
}

.feature-list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.25rem;
    width: 24px;
    height: 24px;
    background-image: url('/images/icons/icon_checked.svg');
    background-size: 24px;
    background-repeat: no-repeat;
    background-position: center;
}

.feature-image {
    text-align: center;
    padding: 2rem 0;
}

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

/* ===== BLOG SECTION ===== */
.blog-section {
    padding: 5rem 0;
    background: #fff;
}

/* Blog grid is now handled by Bootstrap's row/col system */

.blog-card {
    background: #fff;
    border-radius: 1rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.blog-card-link {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 1;
}

.blog-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.blog-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

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

.blog-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.blog-title {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: #163139;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
}

.blog-excerpt {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 0.875rem;
    line-height: 1.6;
    color: #666;
    margin-bottom: 1.5rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
}

.blog-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 0.875rem;
    color: #A2ADB0;
    margin-top: auto;
}

.blog-author,
.blog-date,
.blog-read-time {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.blog-read-more {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 0.875rem;
    font-weight: 600;
    color: #34C792;
    text-decoration: none;
    margin-top: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: color 0.2s ease;
}

.blog-read-more:hover {
    color: #2ba67a;
}

.read-more-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    background: #34C792;
    color: white;
    text-decoration: none;
    border-radius: 0.75rem;
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-weight: 600;
    transition: background-color 0.2s ease;
}

.read-more-btn:hover {
    background: #2ba67a;
    color: white;
}

/* ===== FOOTER STYLES ===== */
.site-footer {
    background: #fff;
    border-top: 1px solid rgba(21, 26, 39, 0.06);
    padding: 3rem 0 1.5rem;
}

.footer-brand .footer-col-title {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 1.125rem;
    font-weight: 600;
    color: #163139;
    margin-bottom: 1rem;
    display: block;
}

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

.footer-social a {
    display: inline-block;
    transition: transform 0.2s ease;
}

.footer-social a:hover {
    transform: translateY(-2px);
}

.footer-col-links {
    list-style: none;
    padding: 0;
}

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

.footer-col-links a {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 0.875rem;
    color: #666;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-col-links a:hover {
    color: #34C792;
}

.footer-divider {
    border: none;
    border-top: 1px solid rgba(21, 26, 39, 0.06);
    margin: 2rem 0;
}

.footer-icp,
.footer-copyright {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 0.875rem;
    color: #999;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    
    .banner-title {
        font-size: 2rem;
    }
    
    .download-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .download-btn {
        width: 100%;
        justify-content: center;
    }
    
    .feature-section,
    .feature-section--reverse {
        flex-direction: column;
        gap: 2rem;
        text-align: center;
    }
    
    .language-switch {
        margin-top: 1rem;
        width: 100px;
    }
    
    .lang-btn {
        width: 50px;
        font-size: 14px;
    }
    
    /* Blog section mobile optimization */
    .blog-section {
        padding: 3rem 0;
    }
    
    .blog-card {
        margin-bottom: 1.5rem;
    }
    
    .blog-title {
        font-size: 1.125rem;
    }
    
    .blog-excerpt {
        font-size: 0.875rem;
    }
    
    .blog-meta {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    /* Article page mobile optimization */
    .article-header h1 {
        font-size: 1.75rem;
    }
    
    .article-description {
        font-size: 1rem;
    }
    
    .article-meta {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    /* Page header mobile optimization */
    .page-header h1 {
        font-size: 2rem;
    }
    
    .page-description {
        font-size: 1rem;
    }
}

@media (max-width: 576px) {
    .section-header h2 {
        font-size: 1.75rem;
    }
    
    .feature-title {
        font-size: 1.5rem;
    }
    
    .brand-text {
        font-size: 1.25rem;
    }
    
    /* Extra small mobile optimization */
    .banner-title {
        font-size: 1.75rem;
    }
    
    .banner-description {
        font-size: 1rem;
    }
    
    .download-btn {
        padding: 0.875rem 1rem;
    }
    
    .download-title {
        font-size: 1rem;
    }
    
    .download-sub {
        font-size: 0.75rem;
    }
    
    .blog-title {
        font-size: 1rem;
    }
    
    .blog-excerpt {
        font-size: 0.8125rem;
    }
    
    .article-header h1 {
        font-size: 1.5rem;
    }
    
    .page-header h1 {
        font-size: 1.75rem;
    }
    
    /* Card mobile optimization */
    .card-title {
        font-size: 1.125rem;
    }
    
    .card-description {
        font-size: 0.875rem;
    }
    
    /* About and Features pages extra small mobile optimization */
    .section-header.text-start h2 {
        font-size: 1.75rem;
    }
    
    .feature-title {
        font-size: 1.5rem;
    }
    
    .feature-description {
        font-size: 1rem;
    }
    
    .feature-list li {
        font-size: 0.875rem;
    }
    
    /* Footer mobile optimization */
    .footer-social {
        justify-content: center;
    }
    
    .footer-icp,
    .footer-copyright {
        text-align: center;
        font-size: 0.8125rem;
    }
}

/* ===== MOBILE-SPECIFIC STYLES ===== */
@media (max-width: 768px) {
    /* Container padding handled in responsive container section above */
    
    /* Banner mobile layout - removed duplicate, handled in banner section */
    
    .download-buttons {
        padding-bottom: 30px;
    }
    
    /* Features mobile layout */
    .product-features {
        padding: 3rem 0;
    }
    
    .feature-text {
        padding: 1rem 0;
    }
    
    .feature-image {
        padding: 1rem 0;
    }
    
    /* About and Features pages mobile optimization */
    .section-header.text-start h2 {
        font-size: 2rem;
        text-align: left;
    }
    
    .section-header.text-start p {
        text-align: left;
        margin: 0;
    }
    
    .feature-text {
        text-align: left;
    }
    
    .feature-description {
        text-align: left;
    }
    
    .feature-list {
        text-align: left;
    }
    
    .feature-list li {
        text-align: left;
    }
    
    /* Blog mobile layout */
    .blog-section {
        padding: 3rem 0;
    }
    
    /* Article mobile layout */
    .article {
        padding: 2rem 0;
    }
    
    .article-content {
        font-size: 1rem;
        line-height: 1.7;
    }
    
    .article-content h2 {
        font-size: 1.5rem;
        margin-top: 2rem;
        margin-bottom: 1rem;
    }
    
    .article-content h3 {
        font-size: 1.25rem;
        margin-top: 1.5rem;
        margin-bottom: 0.75rem;
    }
    
    .article-content p {
        margin-bottom: 1rem;
    }
    
    .article-content ul,
    .article-content ol {
        margin-bottom: 1rem;
        padding-left: 1.5rem;
    }
    
    .article-content li {
        margin-bottom: 0.5rem;
    }
    
    .article-content blockquote {
        margin: 1.5rem 0;
        padding: 1rem;
        border-left: 4px solid #34C792;
        background: #f8f9fa;
        font-style: italic;
    }
    
    .article-content img {
        max-width: 100%;
        height: auto;
        margin: 1rem 0;
        border-radius: 0.5rem;
    }
    
    .article-content code {
        background: #f8f9fa;
        padding: 0.125rem 0.25rem;
        border-radius: 0.25rem;
        font-size: 0.875rem;
    }
    
    .article-content pre {
        background: #f8f9fa;
        padding: 1rem;
        border-radius: 0.5rem;
        overflow-x: auto;
        margin: 1rem 0;
    }
    
    .article-content pre code {
        background: none;
        padding: 0;
    }
}

/* ===== TABLET OPTIMIZATION ===== */
@media (min-width: 769px) and (max-width: 1024px) {
    .banner-title {
        font-size: 2.5rem;
    }
    
    .feature-title {
        font-size: 1.75rem;
    }
    
    .blog-title {
        font-size: 1.125rem;
    }
    
    .article-header h1 {
        font-size: 2.25rem;
    }
}

/* ===== PAGE STYLES ===== */
.page-header {
    padding: 3rem 0 2rem;
    text-align: center;
}

.page-header h1 {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: #163139;
    margin-bottom: 1rem;
}

.page-description {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 1.125rem;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* ===== CARD STYLES ===== */
.card {
    border: none;
    border-radius: 1rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.card-img-top {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.card-body {
    padding: 1.5rem;
}

.card-title {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    color: #163139;
    margin-bottom: 1rem;
}

.card-title a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
}

.card-title a:hover {
    color: #34C792;
}

.card-description {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 0.875rem;
    color: #666;
    line-height: 1.6;
    margin-bottom: 1rem;
}

.card-meta {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 0.875rem;
    color: #A2ADB0;
}

/* ===== ARTICLE STYLES ===== */
.article {
    padding: 3rem 0;
}

.article-header {
    margin-bottom: 3rem;
}

.article-header h1 {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: #163139;
    margin-bottom: 1rem;
}

.article-description {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 1.125rem;
    color: #666;
    line-height: 1.7;
}

.article-meta {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 0.875rem;
    color: #A2ADB0;
}

.article-content {
    font-family: 'Alibaba PuHuiTi', sans-serif;
    font-size: 1.125rem;
    line-height: 1.8;
    color: #333;
}

.article-content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: #163139;
    margin-top: 2.5rem;
    margin-bottom: 1rem;
}

.article-content h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: #163139;
    margin-top: 2rem;
    margin-bottom: 0.75rem;
}

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

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

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

.article-content blockquote {
    margin: 2rem 0;
    padding: 1.5rem;
    border-left: 4px solid #34C792;
    background: #f8f9fa;
    font-style: italic;
    border-radius: 0.5rem;
}

.article-content img {
    max-width: 100%;
    height: auto;
    margin: 2rem 0;
    border-radius: 0.75rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.article-content code {
    background: #f8f9fa;
    padding: 0.125rem 0.25rem;
    border-radius: 0.25rem;
    font-size: 0.875rem;
    color: #e83e8c;
}

.article-content pre {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 0.75rem;
    overflow-x: auto;
    margin: 2rem 0;
    border: 1px solid #e9ecef;
}

.article-content pre code {
    background: none;
    padding: 0;
    color: #333;
}

/* ===== 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: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }

.p-0 { padding: 0; }
.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 1rem; }
.p-4 { padding: 1.5rem; }
.p-5 { padding: 3rem; }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-grid { display: grid; }

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