:root{--ailc-bg:#fff;--ailc-border:#e5e7eb;--ailc-muted:#6b7280;--ailc-primary:#111827;--ailc-user:#e6f0ff;--ailc-ai:#eef7ea;--ailc-pill:#111827;--ailc-pill-text:#fff;--ailc-shadow:0 8px 24px rgba(0,0,0,.06)}.ailc-wrap{background:var(--ailc-bg);border:1px solid var(--ailc-border);border-radius:16px;box-shadow:var(--ailc-shadow);max-width:940px;margin:20px auto;position:relative}.ailc-header{display:flex;justify-content:space-between;padding:16px 18px;border-bottom:1px solid var(--ailc-border)}.ailc-title{margin:0 0 4px;font-size:20px;color:var(--ailc-primary)}.ailc-subtitle{margin:0;color:var(--ailc-muted);font-size:14px}.ailc-header-actions button{border:1px solid var(--ailc-border);background:transparent;color:var(--ailc-muted);padding:8px 12px;border-radius:10px;cursor:pointer}.ailc-chat{max-height:60vh;min-height:320px;overflow-y:auto;padding:18px;scroll-behavior:smooth}.ailc-msg{display:flex;gap:10px;margin:12px 0}.ailc-avatar{width:28px;height:28px;border-radius:50%;background:var(--ailc-border);display:flex;align-items:center;justify-content:center;font-size:12px;color:var(--ailc-muted);flex:0 0 28px}.ailc-bubble{max-width:75%;padding:12px 14px;border-radius:14px;background:var(--ailc-ai);color:var(--ailc-primary);line-height:1.55;border:1px solid var(--ailc-border);white-space:pre-wrap}.ailc-bubble .ailc-meta{font-size:11px;color:var(--ailc-muted);margin-top:6px}.ailc-bubble .ailc-actions{display:flex;gap:8px;margin-top:6px}.ailc-bubble .ailc-actions button{font-size:11px;border:1px solid var(--ailc-border);background:transparent;color:var(--ailc-muted);border-radius:8px;padding:4px 6px;cursor:pointer}.ailc-msg.user .ailc-bubble{background:var(--ailc-user);margin-left:auto}.ailc-msg.user{justify-content:flex-end}.ailc-msg.user .ailc-avatar{order:2}.ailc-thinking{font-style:italic;color:var(--ailc-muted)}.ailc-composer{border-top:1px solid var(--ailc-border);display:flex;gap:10px;padding:14px 16px;position:sticky;bottom:0;background:var(--ailc-bg)}.ailc-input{flex:1;resize:none;border:1px solid var(--ailc-border);border-radius:12px;padding:12px 14px;line-height:1.5;background:transparent;color:var(--ailc-primary)}.ailc-send{border:1px solid var(--ailc-border);background:var(--ailc-pill);color:var(--ailc-pill-text);border-radius:12px;padding:12px 16px;cursor:pointer;font-weight:600}.ailc-send[disabled]{opacity:.6;cursor:not-allowed}.ailc-toast{position:absolute;left:50%;transform:translateX(-50%);bottom:110px;background:var(--ailc-pill);color:var(--ailc-pill-text);padding:8px 12px;border-radius:10px;box-shadow:var(--ailc-shadow);z-index:20;max-width:80%;text-align:center}.ailc-scroll-bottom{position:absolute;right:12px;bottom:120px;width:36px;height:36px;border-radius:50%;border:1px solid var(--ailc-border);background:var(--ailc-bg);cursor:pointer;display:none;align-items:center;justify-content:center}.ailc-cite-drawer{border-top:1px dashed var(--ailc-border);padding:10px 14px;max-height:200px;overflow:auto}.ailc-cite-head{display:flex;justify-content:space-between;margin-bottom:6px}.ailc-cite-close{border:1px solid var(--ailc-border);background:transparent;color:var(--ailc-muted);border-radius:8px;padding:4px 8px;cursor:pointer}@media(max-width:640px){.ailc-bubble{max-width:85%}.ailc-composer{flex-direction:column}.ailc-send{width:100%}}.ailc-error{padding:10px;border:1px solid #fca5a5;background:#fef2f2;color:#991b1b;border-radius:6px}