.category-landing{min-height:calc(100vh - 200px);padding-top:calc(72px + 2.5rem);background:var(--color-background)}.category-landing__container{max-width:1200px;margin:0 auto;padding:var(--spacing-xl) var(--spacing-lg)}.category-hero{text-align:center;margin-bottom:var(--spacing-2xl);padding:var(--spacing-xl) 0}.category-hero__title{font-size:clamp(2rem, 5vw, 3rem);font-weight:var(--font-weight-bold);color:var(--color-text-primary);margin-bottom:var(--spacing-md);background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.category-hero__subtitle{font-size:var(--font-size-large);color:var(--color-text-secondary)}.loading-state{text-align:center;padding:var(--spacing-2xl)}.loading-spinner{width:48px;height:48px;border:4px solid var(--color-border);border-top-color:var(--color-primary);border-radius:50%;animation:spin 1s linear infinite;margin:0 auto var(--spacing-md)}@keyframes spin{to{transform:rotate(360deg)}}.error-state{text-align:center;padding:var(--spacing-2xl);color:var(--color-error,#dc2626)}.catalog-section{margin-bottom:var(--spacing-2xl)}.catalog-section__title{font-size:var(--font-size-2xl);font-weight:var(--font-weight-semibold);color:var(--color-text-primary);margin-bottom:var(--spacing-lg);padding-bottom:var(--spacing-sm);border-bottom:2px solid var(--color-border)}.category-tree{background:var(--color-background-alt,#f9fafb);border-radius:var(--radius-lg);padding:var(--spacing-lg)}.category-list{list-style:none;padding:0;margin:0}.category-item{margin-bottom:var(--spacing-xs)}.category-button{width:100%;text-align:left;padding:var(--spacing-md) var(--spacing-lg);background:var(--color-background);border:1px solid var(--color-border);border-radius:var(--radius-md);font-size:var(--font-size-base);font-weight:var(--font-weight-medium);color:var(--color-text-primary);cursor:pointer;transition:all var(--transition-fast);position:relative}.category-button:hover{background:var(--color-primary);color:#fff;border-color:var(--color-primary);transform:translateX(4px)}.category-button--has-children::after{content:'›';position:absolute;right:var(--spacing-md);font-size:1.5rem;font-weight:700}.category-children{margin-left:var(--spacing-lg);margin-top:var(--spacing-sm);padding-left:var(--spacing-md);border-left:2px solid var(--color-border)}.category-children .category-button{font-size:var(--font-size-small);padding:var(--spacing-sm) var(--spacing-md)}.brand-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:var(--spacing-md)}.brand-card{background:var(--color-background);border:2px solid var(--color-border);border-radius:var(--radius-lg);padding:var(--spacing-xl);text-align:center;cursor:pointer;transition:all var(--transition-base);position:relative;overflow:hidden}.brand-card::before{content:'';position:absolute;top:0;left:0;width:100%;height:4px;background:var(--gradient-primary);transform:scaleX(0);transform-origin:left;transition:transform var(--transition-base)}.brand-card:hover{border-color:var(--color-primary);box-shadow:var(--shadow-lg);transform:translateY(-4px)}.brand-card:hover::before{transform:scaleX(1)}.brand-card__name{font-size:var(--font-size-large);font-weight:var(--font-weight-semibold);color:var(--color-text-primary);display:block}.brand-card:hover .brand-card__name{color:var(--color-primary)}.empty-state{text-align:center;padding:var(--spacing-2xl);color:var(--color-text-secondary);font-style:italic}@media (max-width:768px){.category-landing__container{padding:var(--spacing-lg) var(--spacing-md)}.category-hero{margin-bottom:var(--spacing-xl);padding:var(--spacing-lg) 0}.brand-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:var(--spacing-sm)}.category-children{margin-left:var(--spacing-md)}}@media (max-width:480px){.brand-grid{grid-template-columns:1fr 1fr}.brand-card{padding:var(--spacing-lg)}.brand-card__name{font-size:var(--font-size-base)}}