.faq-title{font-size:1.8rem;color:var(--primary-color);margin-bottom:30px;text-align:center}.faq-item.active .faq-answer{padding:20px;max-height:1000px}.faq-toggle{transition:transform .3s ease}.faq-item.active .faq-toggle{transform:rotate(180deg)}.conclusion-title{font-size:1.5rem;color:var(--primary-color);margin-bottom:20px;text-align:center}.back-to-top{position:fixed;bottom:30px;right:30px;width:50px;height:50px;border-radius:50%;background-color:var(--primary-color);color:white;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 2px 10px rgba(0,0,0,.2);transition:background-color .3s ease,transform .3s ease;opacity:0;visibility:hidden}.back-to-top.visible{opacity:1;visibility:visible}.back-to-top:hover{background-color:var(--secondary-color);transform:translateY(-5px)}