.kb-section{background:var(--color-bg-primary);min-height:100vh;padding:var(--space-20) 0}.kb-container{max-width:var(--container-max);padding:0 var(--container-padding);margin:0 auto}.kb-header{margin-bottom:var(--space-16);padding-top:var(--space-10);text-align:center}.kb-title{color:var(--color-text-primary);font-family:var(--font-display);letter-spacing:-.02em;margin-bottom:var(--space-4);font-size:clamp(2.5rem,5vw,3.5rem);font-weight:500}.kb-subtitle{color:var(--color-text-secondary);margin:0 auto var(--space-10);max-width:600px;font-size:1.125rem;line-height:1.6}.kb-search-wrapper{max-width:600px;margin:0 auto;position:relative}.kb-search-icon{color:var(--color-text-tertiary);left:var(--space-5);pointer-events:none;position:absolute;top:50%;transform:translateY(-50%)}.kb-search-input{background:var(--color-surface-0);border:1px solid var(--color-border);border-radius:var(--radius-full);box-shadow:var(--shadow-sm);color:var(--color-text-primary);padding:var(--space-5) var(--space-5) var(--space-5) calc(var(--space-5) + 28px);transition:all var(--transition-fast);width:100%;font-size:1rem}.kb-search-input:focus{border-color:var(--color-primary);box-shadow:var(--shadow-md),0 0 0 4px var(--color-primary-alpha);outline:2px solid var(--color-primary);outline-offset:2px}.kb-search-input::placeholder{color:var(--color-text-tertiary)}.kb-search-results{border-radius:var(--radius-full);padding:var(--space-1) var(--space-3);right:calc(var(--space-5) + 32px);font-size:.875rem}.kb-search-clear,.kb-search-results{background:var(--color-surface-100);color:var(--color-text-tertiary);position:absolute;top:50%;transform:translateY(-50%)}.kb-search-clear{border-radius:var(--radius-full);cursor:pointer;height:28px;right:var(--space-4);transition:all var(--transition-fast);border:none;justify-content:center;align-items:center;width:28px;display:flex}.kb-search-clear:hover{background:var(--color-text-tertiary);color:var(--color-surface-0)}.kb-search-results-view{max-width:800px;margin:0 auto}.kb-search-result-info{gap:var(--space-1);flex-direction:column;flex:1;display:flex}.kb-search-result-category{color:var(--color-text-tertiary);align-items:center;gap:var(--space-2);letter-spacing:.05em;text-transform:uppercase;font-size:.75rem;font-weight:500;display:inline-flex}.kb-search-result-question{color:var(--color-text-primary);font-size:1rem;font-weight:500}.kb-no-results{color:var(--color-text-tertiary);padding:var(--space-16) var(--space-8);text-align:center}.kb-no-results svg{margin-bottom:var(--space-4);opacity:.4}.kb-no-results h3{color:var(--color-text-secondary);font-family:var(--font-display);margin-bottom:var(--space-2);font-size:1.5rem}.kb-no-results p{color:var(--color-text-tertiary);font-size:1rem}.kb-categories-grid{gap:var(--space-6);grid-template-columns:repeat(auto-fit,minmax(320px,1fr));display:grid}.kb-category-card{background:var(--color-surface-0);border:1px solid var(--color-border);border-radius:var(--radius-xl);cursor:pointer;align-items:center;gap:var(--space-5);padding:var(--space-6);text-align:left;transition:all var(--transition-normal);width:100%;display:flex}.kb-category-card:hover{border-color:var(--color-border-focus);box-shadow:var(--shadow-md);transform:translateY(-2px)}.kb-category-icon{background:var(--color-surface-100);border-radius:var(--radius-lg);color:var(--color-text-primary);height:56px;transition:all var(--transition-normal);flex-shrink:0;justify-content:center;align-items:center;width:56px;display:flex}.kb-category-card:hover .kb-category-icon{background:var(--color-primary);color:var(--color-surface-0)}.kb-category-info{flex:1}.kb-category-title{color:var(--color-text-primary);font-family:var(--font-display);margin-bottom:var(--space-1);font-size:1.125rem;font-weight:600}.kb-category-desc{color:var(--color-text-secondary);margin-bottom:var(--space-2);font-size:.875rem;line-height:1.5}.kb-category-count{color:var(--color-text-tertiary);letter-spacing:.05em;text-transform:uppercase;font-size:.75rem;font-weight:500}.kb-category-arrow{color:var(--color-text-tertiary);transition:transform var(--transition-normal)}.kb-category-card:hover .kb-category-arrow{color:var(--color-text-primary);transform:translate(4px)}.kb-detail-view{max-width:800px;margin:0 auto}.kb-back-btn{border-radius:var(--radius-full);color:var(--color-text-secondary);cursor:pointer;align-items:center;gap:var(--space-2);margin-bottom:var(--space-6);padding:var(--space-2) var(--space-4);transition:all var(--transition-fast);background:0 0;border:none;font-size:.9rem;font-weight:500;display:inline-flex}.kb-back-btn:hover{background:var(--color-surface-100);color:var(--color-text-primary)}.kb-detail-header{background:var(--color-surface-0);border:1px solid var(--color-border);border-radius:var(--radius-xl);align-items:center;gap:var(--space-5);margin-bottom:var(--space-8);padding:var(--space-8);display:flex}.kb-detail-icon{background:var(--color-primary);border-radius:var(--radius-lg);color:var(--color-surface-0);flex-shrink:0;justify-content:center;align-items:center;width:64px;height:64px;display:flex}.kb-detail-title{color:var(--color-text-primary);font-family:var(--font-display);margin-bottom:var(--space-1);font-size:1.5rem;font-weight:600}.kb-detail-desc{color:var(--color-text-secondary);font-size:1rem}.kb-articles-list{gap:var(--space-3);flex-direction:column;display:flex}.kb-article-item{background:var(--color-surface-0);border:1px solid var(--color-border);border-radius:var(--radius-lg);transition:all var(--transition-normal);overflow:hidden}.kb-article-item:hover{border-color:var(--color-border-focus)}.kb-article-item.expanded{border-color:var(--color-primary);box-shadow:var(--shadow-md)}.kb-article-question{color:var(--color-text-primary);cursor:pointer;padding:var(--space-5) var(--space-6);text-align:left;transition:background var(--transition-fast);background:0 0;border:none;justify-content:space-between;align-items:center;width:100%;font-size:1rem;font-weight:500;display:flex}.kb-article-question:hover{background:var(--color-surface-50)}.kb-article-chevron{color:var(--color-text-tertiary);transition:transform var(--transition-normal);flex-shrink:0}.kb-article-chevron.rotated{color:var(--color-primary);transform:rotate(180deg)}.kb-article-answer{max-height:0;transition:max-height .3s ease-out;overflow:hidden}.kb-article-item.expanded .kb-article-answer{max-height:500px}.kb-article-answer-inner{border-top:1px solid var(--color-border-subtle);color:var(--color-text-secondary);margin-top:var(--space-1);padding:0 var(--space-6) var(--space-6);padding-top:var(--space-5);font-size:.95rem;line-height:1.7}@media (max-width:768px){.kb-header{padding-top:var(--space-6)}.kb-title{font-size:2rem}.kb-subtitle{font-size:1rem}.kb-categories-grid{gap:var(--space-4);grid-template-columns:1fr}.kb-category-card{padding:var(--space-5)}.kb-category-icon{width:48px;height:48px}.kb-detail-header{padding:var(--space-6);text-align:center;flex-direction:column}.kb-detail-icon{width:56px;height:56px}.kb-article-question{padding:var(--space-4) var(--space-5);font-size:.95rem}.kb-article-answer-inner{padding:0 var(--space-5) var(--space-5)}}