/* 币润 BiRun - 问 AI（v14.140） */
.ask-main{max-width:860px;margin:0 auto;padding:0 16px}
.ask-page{position:relative;display:flex;flex-direction:column;min-height:calc(100vh - var(--header-h) - 40px)}
.ask-bar{display:flex;align-items:center;justify-content:space-between;padding:14px 0 10px;border-bottom:1px solid var(--line);position:sticky;top:var(--header-h);z-index:20;background:var(--bg)}
.ask-bar-title{font-size:17px;font-weight:700;display:flex;align-items:center;gap:8px;color:var(--text-1)}
.ask-bar-title i{color:var(--brand)}
.ask-bar-actions{display:flex;gap:6px}
.ask-icon-btn{width:36px;height:36px;border-radius:10px;border:1px solid var(--line);background:var(--bg-panel);color:var(--text-2);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;font-size:15px;transition:background .15s,color .15s}
.ask-icon-btn:hover{color:var(--brand);border-color:var(--brand)}
.ask-link-btn{border:0;background:none;color:var(--text-3);cursor:pointer;font-size:13px}
.ask-link-btn:hover{color:var(--down)}
.ask-history{position:absolute;right:0;top:60px;z-index:30;width:min(340px,100%);max-height:60vh;overflow:auto;background:var(--bg-elev);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-lg);padding:10px}
.ask-history-head{display:flex;justify-content:space-between;align-items:center;padding:4px 6px 8px;font-size:14px}
.ask-history ul{list-style:none}
.ask-history li{display:flex;align-items:center;gap:6px}
.ask-history li button.ask-h-open{flex:1;text-align:left;border:0;background:none;color:var(--text-1);padding:8px 6px;border-radius:8px;cursor:pointer;font-size:14px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}
.ask-history li button.ask-h-open:hover{background:var(--bg-soft)}
.ask-history li button.ask-h-del{border:0;background:none;color:var(--text-3);cursor:pointer;padding:6px}
.ask-history .ask-h-empty{color:var(--text-3);font-size:13px;padding:8px 6px}

.ask-thread{flex:1;padding:8px 0 24px}
.ask-welcome{padding:9vh 0 20px;text-align:center}
.ask-page[data-state="chat"] .ask-welcome{display:none}
.ask-welcome-title{font-size:34px;font-weight:700;letter-spacing:.5px;background:var(--brand-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.ask-welcome-sub{margin:10px auto 36px;color:var(--text-3);font-size:14px;max-width:460px}
.ask-topics-head{display:flex;justify-content:space-between;align-items:center;max-width:640px;margin:0 auto 10px;font-size:13px;color:var(--text-2);font-weight:600}
.ask-topics-head i{color:var(--hot)}
.ask-topics-time{color:var(--text-3);font-weight:400}
.ask-topics{list-style:none;max-width:640px;margin:0 auto;display:grid;gap:10px;text-align:left}
.ask-topic{display:flex;align-items:center;gap:10px;padding:13px 16px;border-radius:12px;background:var(--bg-panel);border:1px solid var(--line);color:var(--text-1);font-size:15px;cursor:pointer;transition:border-color .15s,transform .15s,background .15s}
.ask-topic:hover{border-color:var(--brand);transform:translateY(-1px)}
.ask-topic i{color:var(--brand);flex:none}
.ask-topic .ask-topic-q{flex:1;min-width:0}
.ask-topic .ask-topic-tag{flex:none;font-size:11px;padding:2px 8px;border-radius:999px;background:var(--brand-grad-soft);color:var(--brand)}
.ask-topic.is-loading{cursor:default;color:var(--text-3);min-height:48px;background:linear-gradient(90deg,var(--bg-panel),var(--bg-soft),var(--bg-panel));background-size:200% 100%;animation:ask-shimmer 1.4s infinite}
@keyframes ask-shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}

.ask-messages{display:flex;flex-direction:column;gap:18px}
.ask-msg{display:flex;flex-direction:column;max-width:100%}
.ask-msg-user{align-items:flex-end}
.ask-msg-user .ask-bubble{background:var(--brand);color:#fff;border-radius:16px 16px 4px 16px;padding:10px 14px;max-width:82%;white-space:pre-wrap;word-break:break-word;font-size:15px}
.ask-msg-ai .ask-bubble{background:var(--bg-panel);border:1px solid var(--line);border-radius:4px 16px 16px 16px;padding:14px 16px;font-size:15px;line-height:1.75;color:var(--text-1);word-break:break-word}
.ask-status{display:flex;align-items:center;gap:8px;color:var(--text-3);font-size:13px;margin-bottom:8px}
.ask-dots{display:inline-flex;gap:3px}
.ask-dots i{width:5px;height:5px;border-radius:50%;background:var(--brand);animation:ask-dot 1s infinite ease-in-out}
.ask-dots i:nth-child(2){animation-delay:.15s}.ask-dots i:nth-child(3){animation-delay:.3s}
@keyframes ask-dot{0%,80%,100%{opacity:.25;transform:scale(.8)}40%{opacity:1;transform:scale(1)}}
.ask-answer p{margin:0 0 .7em}
.ask-answer p:last-child{margin-bottom:0}
.ask-answer h3,.ask-answer h4{font-size:15px;margin:.9em 0 .4em;color:var(--text-1)}
.ask-answer ul,.ask-answer ol{margin:.2em 0 .8em 1.3em}
.ask-answer li{margin:.2em 0}
.ask-answer strong{color:var(--text-1);font-weight:700}
.ask-answer code{background:var(--bg-soft);padding:1px 5px;border-radius:5px;font-size:.92em}
.ask-answer .ask-cite{display:inline-flex;align-items:center;justify-content:center;min-width:18px;height:18px;padding:0 4px;margin:0 1px;border-radius:5px;background:var(--brand-grad-soft);color:var(--brand);font-size:11px;font-weight:700;text-decoration:none;vertical-align:2px;line-height:1}
.ask-answer .ask-cite:hover{background:var(--brand);color:#fff}
.ask-caret{display:inline-block;width:7px;height:15px;background:var(--brand);vertical-align:-2px;margin-left:2px;animation:ask-blink 1s steps(2) infinite}
@keyframes ask-blink{50%{opacity:0}}
.ask-error{color:var(--down);font-size:14px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.ask-error button{border:1px solid var(--line);background:var(--bg-elev);color:var(--text-1);border-radius:8px;padding:4px 10px;cursor:pointer;font-size:13px}

.ask-sources{margin-top:12px;border-top:1px dashed var(--line);padding-top:10px}
.ask-sources summary{cursor:pointer;color:var(--text-2);font-size:13px;list-style:none;display:flex;align-items:center;gap:6px}
.ask-sources summary::-webkit-details-marker{display:none}
.ask-sources summary i.fa-chevron-right{transition:transform .15s;font-size:11px}
.ask-sources[open] summary i.fa-chevron-right{transform:rotate(90deg)}
.ask-src-list{list-style:none;display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:8px;margin-top:10px}
.ask-src{display:flex;gap:8px;align-items:flex-start;padding:8px 10px;border-radius:10px;background:var(--bg);border:1px solid var(--line);text-decoration:none;color:var(--text-1);font-size:13px;line-height:1.45}
.ask-src:hover{border-color:var(--brand)}
.ask-src b{flex:none;min-width:20px;height:20px;border-radius:6px;background:var(--brand-grad-soft);color:var(--brand);font-size:11px;display:inline-flex;align-items:center;justify-content:center}
.ask-src span{flex:1;min-width:0;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.ask-src em{display:block;font-style:normal;color:var(--text-3);font-size:11px;margin-top:2px}
.ask-src.is-hl{border-color:var(--brand);box-shadow:0 0 0 2px var(--brand-glow)}
.ask-msg-tools{display:flex;gap:12px;margin-top:8px;font-size:12px;color:var(--text-3);align-items:center;flex-wrap:wrap}
.ask-msg-tools button{border:0;background:none;color:var(--text-3);cursor:pointer;font-size:12px;display:inline-flex;align-items:center;gap:4px;padding:2px 0}
.ask-msg-tools button:hover{color:var(--brand)}
.ask-follow{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.ask-follow button{border:1px solid var(--line);background:var(--bg-elev);color:var(--text-2);border-radius:999px;padding:5px 12px;font-size:13px;cursor:pointer}
.ask-follow button:hover{border-color:var(--brand);color:var(--brand)}

.ask-form{position:sticky;bottom:0;z-index:25;padding:10px 0 12px;background:linear-gradient(180deg,transparent,var(--bg) 26%)}
.ask-input-wrap{display:flex;align-items:flex-end;gap:8px;background:var(--bg-panel);border:1px solid var(--line-strong);border-radius:22px;padding:8px 8px 8px 16px;box-shadow:var(--shadow)}
.ask-input-wrap:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-glow)}
.ask-input{flex:1;resize:none;border:0;outline:0;background:transparent;color:var(--text-1);font:inherit;font-size:15px;line-height:1.5;max-height:140px;padding:6px 0}
.ask-input::placeholder{color:var(--text-3)}
.ask-send{flex:none;width:38px;height:38px;border-radius:50%;border:0;background:var(--brand);color:#fff;cursor:pointer;font-size:16px;display:inline-flex;align-items:center;justify-content:center;transition:opacity .15s,transform .15s}
.ask-send:disabled{opacity:.4;cursor:not-allowed}
.ask-send.is-stop{background:var(--text-1);color:var(--bg)}
.ask-send:not(:disabled):hover{transform:scale(1.05)}
.ask-disclaimer{text-align:center;color:var(--text-3);font-size:11.5px;margin-top:6px}

/* 顶部导航入口 */
.main-nav .nav-ask i{color:var(--brand);font-size:.9em}
@media (max-width:768px){
  .ask-main{padding:0 12px}
  .ask-page{min-height:calc(100vh - var(--header-h) - 70px)}
  .ask-bar{padding:10px 0 8px}
  .ask-welcome{padding:6vh 0 12px}
  .ask-welcome-title{font-size:28px}
  .ask-welcome-sub{margin-bottom:24px;font-size:13px}
  .ask-topic{font-size:14px;padding:12px 14px}
  .ask-form{bottom:calc(58px + env(safe-area-inset-bottom,0px));padding-bottom:8px}
  .ask-msg-user .ask-bubble{max-width:88%}
  .ask-msg-ai .ask-bubble{padding:12px 13px}
  .ask-src-list{grid-template-columns:1fr}
  .ask-main ~ footer, body:has(.ask-main) .site-footer{display:none}
}