/* Support CSKH page + chat widget, port từ RE. */
.bb-support-main{padding:80px 16px 16px}
.bb-support-link{display:flex;align-items:center;gap:12px;width:100%;background:#fff;border:1px solid #e5e7eb;border-radius:12px;padding:16px;font-size:14px;text-decoration:none;color:#1e2329;text-align:left;cursor:pointer}
.bb-support-link span:last-child{margin-left:auto;color:#707a8a}
.chat-overlay{display:none;position:fixed;inset:0;background:rgba(15,23,42,.55);z-index:1000;align-items:center;justify-content:center;padding:16px}
.chat-overlay.show{display:flex}
.support-chat{width:min(416px,100%);height:min(496px,72vh);background:#f7f8fc;border-radius:15px;overflow:hidden;display:flex;flex-direction:column;box-shadow:0 16px 46px rgba(0,0,0,.28)}
.support-chat-head{padding:14px;background:linear-gradient(105deg,#1e5fff,#7548c6);color:#fff;font-weight:700;display:flex;justify-content:space-between;align-items:center}
.support-chat-identity{display:flex;flex-direction:column}
.support-chat-identity small{font-weight:400;opacity:.85;font-size:11px}
.support-chat-head button{border:0;background:transparent;color:#fff;font-size:22px;cursor:pointer;line-height:1}
.support-chat-list{flex:1;overflow:auto;padding:14px;background:#f7f8fc;display:flex;flex-direction:column;gap:10px}
.support-greeting small{display:block;font-size:9px;color:#8b93a3;margin-bottom:4px}
.support-message{max-width:72%;padding:9px 11px;border-radius:11px;background:#fff;color:#374151;font-size:13px;box-shadow:0 1px 2px rgba(0,0,0,.04)}
.support-message.user{align-self:flex-end;background:#2467f4;color:#fff}
.support-message small{display:block;font-size:9px;opacity:.7;margin-top:4px}
.support-message img{display:block;max-width:195px;max-height:180px;border-radius:8px;margin-top:7px}
.support-message-bubble{word-break:break-word}
.support-compose{position:relative;display:flex;gap:7px;padding:10px;background:#fff;border-top:1px solid #e4e8f1}
.support-compose textarea{flex:1;resize:none;min-height:52px;max-height:52px;border:1px solid #dbe3ef;border-radius:9px;padding:10px;font:inherit;font-size:13px}
.support-compose input[type=file]{display:none}
.image-picker{min-width:36px;display:flex;align-items:center;justify-content:center;border:1px solid #dbe3ef;border-radius:9px;cursor:pointer;font-size:15px}
.quick-like{border:0;border-radius:9px;background:#f0f2f5;padding:0 10px;font-size:15px;cursor:pointer}
.support-compose button[type=submit]{border:0;border-radius:9px;background:#2467f4;color:#fff;padding:0 14px;font-weight:700;cursor:pointer;font-size:13px}
.image-preview{display:none;position:absolute;bottom:64px;left:10px;background:#fff;padding:5px;border-radius:8px;box-shadow:0 4px 14px rgba(0,0,0,.2)}
.image-preview img{max-width:120px;max-height:120px;border-radius:6px;display:block}
/* Toast thông báo tin nhắn mới của CSKH — góc dưới bên phải, giống bản gốc (RE). */
.chat-toast{position:fixed;bottom:84px;right:16px;background:#1e2329;color:#fff;padding:11px 16px;border-radius:10px;font-size:13px;z-index:2000;opacity:0;transition:opacity .3s;pointer-events:none;box-shadow:0 4px 14px rgba(0,0,0,.2)}
.chat-toast.show{opacity:1}

/* FAQ — port từ RE support.html. */
.faq-section{margin-top:30px;padding:0 16px}
.faq-title{font-size:18px;font-weight:700;color:#1e2329;margin-bottom:16px;text-align:center}
.faq-item{background:#f8f9fa;border-radius:12px;padding:16px;margin-bottom:12px;cursor:pointer;transition:all .2s}
.faq-item:hover{background:#eef0f3}
.faq-question{display:flex;justify-content:space-between;align-items:center;font-size:14px;font-weight:600;color:#1e2329}
.faq-question span{color:#1e5fff;font-size:18px}
.faq-answer{display:none;font-size:13px;color:#707a8a;line-height:1.6;margin-top:10px}
.faq-item.active .faq-answer{display:block}
.faq-item.active .faq-question{color:#1e5fff}
.faq-item.active .faq-question span{transform:rotate(45deg)}