.accordion{width:100%;max-width:700px;margin:20px auto;border-radius:5px;overflow:hidden}.accordion-item{border-bottom:1px solid #ddd}.accordion-header{background:#0073aa;color:#fff;padding:15px;cursor:pointer;font-weight:700;transition:background .3s ease}.accordion-header:hover{background:#005f8d}.accordion-content{padding:15px;background:#f9f9f9;overflow:hidden;max-height:0;transition:max-height .3s ease-out}.accordion-item.active .accordion-content{max-height:500px}