/* 統域小助手 — 網站內建對話選單樣式 */
.bdh-chat{position:fixed;right:24px;bottom:24px;z-index:300;font-family:"Noto Sans TC","Helvetica Neue",Arial,sans-serif;}
.bdh-chat-toggle{width:58px;height:58px;border-radius:50%;background:var(--indigo,#00438D);color:#fff;border:0;
  display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:0 12px 32px -8px rgba(0,67,141,.5);
  transition:background .3s,transform .3s;}
.bdh-chat-toggle:hover{background:var(--indigo-deep,#022C5C);transform:translateY(-2px);}
.bdh-chat-toggle .ic-close{display:none;}
.bdh-chat.open .bdh-chat-toggle .ic-chat{display:none;}
.bdh-chat.open .bdh-chat-toggle .ic-close{display:block;}

.bdh-chat-panel{position:absolute;right:0;bottom:74px;width:min(360px,calc(100vw - 40px));height:min(520px,70vh);
  background:#FAF8F3;border:1px solid rgba(26,37,51,.12);border-radius:10px;box-shadow:0 28px 70px -20px rgba(2,28,60,.35);
  display:flex;flex-direction:column;overflow:hidden;opacity:0;transform:translateY(16px) scale(.98);
  pointer-events:none;transition:opacity .3s ease,transform .3s ease;}
.bdh-chat-panel.open{opacity:1;transform:none;pointer-events:auto;}

.bdh-chat-head{display:flex;align-items:center;gap:12px;padding:16px 18px;background:var(--indigo,#00438D);color:#fff;flex:none;}
.bdh-chat-mark{height:34px;width:auto;flex:none;}
.bdh-chat-title{display:block;font-weight:600;font-size:15.5px;}
.bdh-chat-sub{display:block;font-size:12px;color:rgba(255,255,255,.75);margin-top:2px;}

.bdh-chat-body{flex:1;overflow-y:auto;padding:18px;display:flex;flex-direction:column;gap:10px;}
.bdh-msg{display:flex;}
.bdh-msg.bot{justify-content:flex-start;}
.bdh-msg.user{justify-content:flex-end;}
.bdh-bubble{max-width:82%;padding:11px 15px;border-radius:14px;font-size:14.5px;line-height:1.6;}
.bdh-msg.bot .bdh-bubble{background:#fff;border:1px solid rgba(26,37,51,.1);color:#1A2533;border-bottom-left-radius:4px;}
.bdh-msg.user .bdh-bubble{background:var(--indigo,#00438D);color:#fff;border-bottom-right-radius:4px;}

.bdh-opts{display:flex;flex-direction:column;gap:8px;margin-top:2px;}
.bdh-opt-btn{text-align:left;background:#fff;border:1px solid rgba(0,67,141,.28);color:var(--indigo,#00438D);
  font-size:14px;font-weight:500;padding:10px 14px;border-radius:8px;cursor:pointer;transition:background .2s,border-color .2s;}
.bdh-opt-btn:hover{background:rgba(0,67,141,.06);border-color:var(--indigo,#00438D);}

@media (max-width:480px){
  .bdh-chat{right:16px;bottom:16px;}
  .bdh-chat-panel{width:calc(100vw - 32px);height:min(66vh,520px);bottom:70px;}
}