.container.article-main{padding-top:110px;padding-bottom:var(--spacing-5xl)}.breadcrumbs{color:var(--color-steel-blue);margin-bottom:var(--spacing-lg);flex-wrap:wrap;gap:6px;font-size:13px;list-style:none;display:flex}.breadcrumbs li a{color:var(--color-steel-blue);text-decoration:none}.breadcrumbs li a:hover{color:var(--color-brand-blue)}.breadcrumbs li:not(:last-child):after{content:"/";margin-left:6px}.breadcrumbs li:last-child{color:var(--color-charcoal-text);font-weight:600}.article-header-section{max-width:820px;margin:0 auto var(--spacing-xl);text-align:center}.category-date-row{margin-bottom:var(--spacing-md);justify-content:center;align-items:center;gap:10px;font-size:13px;display:flex}.category-chip{background:var(--color-primary-light);color:var(--color-brand-blue);border-radius:var(--radius-pill);padding:4px 12px;font-weight:700}.article-date{color:var(--color-steel-blue)}.article-title{font-family:var(--font-sans);color:var(--color-deep-charcoal);margin-bottom:var(--spacing-lg);font-size:clamp(24px,4.5vw,40px);font-weight:800;line-height:1.25}.author-row{justify-content:center;align-items:center;gap:var(--spacing-md);color:var(--color-steel-blue);font-size:13px;display:flex}.author-avatar{background:var(--color-primary-light);width:36px;height:36px;color:var(--color-brand-blue);border-radius:50%;justify-content:center;align-items:center;font-size:13px;font-weight:700;display:flex}.author-name{color:var(--color-charcoal-text);font-weight:600}.read-time{align-items:center;gap:4px;display:inline-flex}.hero-image-wrapper{max-width:960px;margin:0 auto var(--spacing-2xl);border-radius:var(--radius-lg);aspect-ratio:16/9;background:#efefef;overflow:hidden}.hero-image{object-fit:cover;width:100%;height:100%}.article-layout{gap:var(--spacing-2xl);grid-template-columns:1fr;max-width:1080px;margin:0 auto;display:grid}@media (width>=1024px){.article-layout{grid-template-columns:1fr 260px}}.article-body-wrapper.rich-text h2{font-family:var(--font-sans);margin:var(--spacing-2xl) 0 var(--spacing-md);color:var(--color-deep-charcoal);scroll-margin-top:100px;font-size:24px;font-weight:800}.article-body-wrapper.rich-text h3{margin:var(--spacing-lg) 0 var(--spacing-sm);font-size:18px;font-weight:700}.article-body-wrapper.rich-text p{margin-bottom:var(--spacing-md);color:var(--color-charcoal-text);font-size:15px}.article-body-wrapper.rich-text ul,.article-body-wrapper.rich-text ol{margin:0 0 var(--spacing-md) var(--spacing-lg)}.article-body-wrapper.rich-text img{border-radius:var(--radius-md);margin:var(--spacing-md) 0}.callout-box{background:var(--color-primary-light);border-radius:var(--radius-md);padding:var(--spacing-md);margin:var(--spacing-lg) 0;gap:12px;display:flex}.article-tags{margin-top:var(--spacing-xl);flex-wrap:wrap;gap:8px;display:flex}.tag-link{color:var(--color-charcoal-text);border-radius:var(--radius-pill);background:#f0f0f0;padding:6px 14px;font-size:12px;text-decoration:none}.share-row{margin-top:var(--spacing-xl);padding-top:var(--spacing-lg);border-top:1px solid #efefef;align-items:center;gap:10px;display:flex}.share-btn{width:40px;height:40px;color:var(--color-charcoal-text);background:#f0f0f0;border-radius:50%;justify-content:center;align-items:center;text-decoration:none;display:flex}.share-btn--facebook:hover,.share-btn--zalo:hover{background:var(--color-brand-blue);color:#fff}.sidebar-col{gap:var(--spacing-lg);flex-direction:column;display:flex}.sidebar-widget{border-radius:var(--radius-lg);padding:var(--spacing-lg);box-shadow:var(--shadow-md);background:#fff;position:sticky;top:100px}.sidebar-widget h3{margin-bottom:var(--spacing-md);text-transform:uppercase;letter-spacing:.03em;color:var(--color-steel-blue);font-size:14px;font-weight:700}.toc-list{border-left:2px solid #f0f0f0;flex-direction:column;gap:8px;list-style:none;display:flex}.toc-link{color:var(--color-steel-blue);border-left:2px solid #0000;margin-left:-2px;padding:4px 0 4px 14px;font-size:13px;text-decoration:none;display:block}.toc-link.active{border-left-color:var(--color-brand-blue);color:var(--color-brand-blue);font-weight:600}@media (width<=1023px){.sidebar-widget.toc-widget{display:none}}.related-section{max-width:1280px;margin:var(--spacing-5xl) auto 0;padding:0 24px}.related-section h2{font-family:var(--font-sans);margin-bottom:var(--spacing-lg);font-size:24px;font-weight:800}.related-grid{gap:var(--spacing-lg);grid-template-columns:1fr;display:grid}@media (width>=768px){.related-grid{grid-template-columns:repeat(3,1fr)}}.article-card{border-radius:var(--radius-lg);box-shadow:var(--shadow-md);color:inherit;background:#fff;text-decoration:none;display:block;overflow:hidden}.card-image-wrapper{aspect-ratio:16/10;background:#efefef;overflow:hidden}.card-image{object-fit:cover;width:100%;height:100%}.card-content{padding:var(--spacing-md)}.card-meta{color:var(--color-steel-blue);gap:6px;margin-bottom:6px;font-size:11px;display:flex}.card-category{color:var(--color-brand-blue);font-weight:700}.card-title{margin-bottom:6px;font-size:15px;font-weight:700;line-height:1.35}.card-excerpt{color:var(--color-steel-blue);margin-bottom:8px;font-size:13px}.card-footer{color:var(--color-brand-blue);align-items:center;gap:4px;font-size:13px;font-weight:600;display:flex}.quick-chip:focus-visible,#chat-send:focus-visible,.nar-chat-trigger:focus-visible{outline:2px solid var(--chat-primary);outline-offset:2px}@media (width<=768px){.nar-chat-window{border:none!important;border-radius:0!important;width:100%!important;height:100%!important;bottom:0!important;right:0!important}.nar-chat-trigger{width:50px;height:50px;bottom:16px;right:16px}.nar-chat-trigger .chat-icon{width:22px;height:22px}.nar-chat-trigger .close-icon{width:18px;height:18px}}