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var(--color-primary);font-weight:700;position:relative}.sidebar-title:after{content:"";background:var(--color-secondary);width:40px;height:2px;position:absolute;bottom:-2px;left:0}.advertisement-section{background:var(--color-white);border-radius:var(--radius-xl);padding:var(--spacing-xl);box-shadow:var(--shadow-lg);position:relative;overflow:hidden}.advertisement-container{border-radius:var(--radius-lg);margin-bottom:var(--spacing-lg);position:relative;overflow:hidden}.ad-item{border-radius:var(--radius-lg);background:var(--color-gray-100);min-height:320px;transition:var(--transition-base);cursor:pointer;display:none;position:relative;overflow:hidden}.ad-item.active{display:block}.ad-image-container{z-index:1;position:absolute;inset:0}.ad-image{object-fit:cover;width:100%;height:100%;transition:var(--transition-slow)}.ad-item:hover 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var(--color-gray-300);border-radius:var(--radius-md);font-size:var(--fs-sm);color:var(--color-gray-700);background:var(--color-white);cursor:pointer;transition:var(--transition-base)}.filter-select:focus{outline:2px solid var(--color-primary);outline-offset:1px;border-color:var(--color-primary);box-shadow:0 0 0 3px #bf17251a}@media (width<=1024px){.sidebar{margin:var(--spacing-lg) 0;order:-1}.advertisement-section,.blog-filters{padding:var(--spacing-lg)}}@media (width<=768px){.layout-grid{padding:0 var(--spacing-md)}.blog-main{padding:var(--spacing-lg);margin:var(--spacing-lg) 0}.blog-item{padding:var(--spacing-lg);margin-bottom:var(--spacing-lg)}.blog-meta{align-items:flex-start;gap:var(--spacing-sm);flex-direction:column}.ad-item{min-height:280px}.ad-content{padding:var(--spacing-lg)}.ad-title{font-size:var(--fs-base)}.ad-description{font-size:var(--fs-xs)}}@media (width<=576px){.layout-grid{padding:0 var(--spacing-sm)}.blog-main{padding:var(--spacing-md);margin:var(--spacing-md) 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