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bk-pulse{0%{opacity:.88;transform:scale(1)}to{opacity:1;transform:scale(1.035)}}.bk-grain{opacity:.025;pointer-events:none;z-index:2;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");position:absolute;inset:0}.bk-content{z-index:10;min-height:0;padding:calc(18px + var(--safe-area-top,env(safe-area-inset-top,0px))) 20px calc(14px + var(--safe-area-bottom,env(safe-area-inset-bottom,0px)));flex-direction:column;flex:1;display:flex;position:relative}@media(min-width:1024px){.bk-content{padding:18px 20px 16px}}.bk-top{justify-content:space-between;align-items:center;gap:8px;display:flex}.bk-round{color:#374151;cursor:pointer;background:#fff;border:0;border-radius:50%;flex:none;justify-content:center;align-items:center;width:44px;height:44px;display:flex;box-shadow:0 2px 10px #0000001a}.bk-chip{-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);color:#333;background:#ffffff80;border:1px solid #0000000d;border-radius:20px;align-items:center;gap:8px;padding:6px 16px 6px 6px;font-size:13px;font-weight:500;display:inline-flex}.bk-chip img{object-fit:cover;border-radius:50%;width:26px;height:26px}.bk-header-text{color:#1a1a1a;letter-spacing:-.5px;margin:34px 4px 0;font-size:34px;font-weight:600;line-height:1.1}.bk-tag-cloud{flex-wrap:wrap;flex-grow:1;align-content:flex-end;gap:12px;margin-bottom:22px;display:flex}.bk-tag{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);color:#333;cursor:pointer;text-align:left;background:#ffffffd9;border:1px solid #fff6;border-radius:24px;align-items:center;gap:8px;padding:10px 18px;font-family:inherit;font-size:14px;transition:all .2s;display:flex;box-shadow:0 4px 12px #0000000d}.bk-tag:hover{background:#fff;transform:translateY(-2px)}.bk-tag svg{flex:none;width:18px;height:18px}.bk-input-bar{background:#ffffffe6;border-radius:30px;flex:none;align-items:center;gap:8px;height:60px;padding:0 8px 0 20px;display:flex;box-shadow:0 10px 25px #00000014}.bk-input-bar input{color:#1a1a1a;background:0 0;border:0;outline:none;flex:1;min-width:0;font-family:inherit;font-size:16px}.bk-input-bar input::placeholder{color:#9ca3af}.bk-mic{color:#fff;cursor:pointer;background:#1d4ed8;border:0;border-radius:50%;flex:none;justify-content:center;align-items:center;width:44px;height:44px;transition:transform .16s,background .16s;display:flex}.bk-mic:active{transform:scale(.94)}.bk-mic:disabled{opacity:.5}.bk-mic.listening{background:#ef4444;animation:1.2s ease-in-out infinite bk-listen}@keyframes bk-listen{50%{box-shadow:0 0 0 8px #ef444433}}.bk-thread{scrollbar-width:none;flex-direction:column;flex:1;gap:10px;min-height:0;margin:14px -20px 12px;padding:6px 20px 8px;display:flex;overflow-y:auto}.bk-thread::-webkit-scrollbar{display:none}.bk-row{flex-direction:column;gap:8px;display:flex}.bk-row.user{align-items:flex-end}.bk-row.assistant{align-items:flex-start}.bk-bubble{word-wrap:break-word;max-width:86%;font-size:15px;line-height:1.5}.bk-row.user .bk-bubble{color:#fff;background:#1d4ed8;border-radius:22px 22px 6px;padding:10px 16px;box-shadow:0 6px 16px #1d4ed833}.bk-row.assistant .bk-bubble{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);background:#ffffffd1;border:1px solid #fff9;border-radius:22px 22px 22px 6px;padding:10px 16px;box-shadow:0 4px 12px #0000000d}.bk-bubble p{margin:0 0 6px}.bk-bubble p:last-child{margin:0}.bk-bubble ul,.bk-bubble ol{margin:4px 0;padding-left:18px}.bk-voice{background:#ffffffe6;border-radius:26px 26px 26px 8px;align-items:center;gap:10px;min-width:230px;padding:8px 14px 8px 8px;display:flex;box-shadow:0 4px 12px #0000000f}.bk-voice-play{cursor:pointer;color:#fff;background:#1d4ed8;border:0;border-radius:50%;flex:none;place-items:center;width:38px;height:38px;display:grid}.bk-wave{flex:1;align-items:center;gap:2px;height:26px;display:flex}.bk-wave i{background:#c7d2fe;border-radius:3px;width:3px;transition:background .12s;display:block}.bk-wave i.on{background:#1d4ed8}.bk-voice time{color:#6b7280;font-variant-numeric:tabular-nums;font-size:12px}.bk-voice-avatar{object-fit:cover;border-radius:50%;flex:none;width:30px;height:30px}.bk-link{cursor:pointer;color:#fff;background:#1a1a1a;border:0;border-radius:22px;align-items:center;gap:8px;padding:10px 16px;font-family:inherit;font-size:14px;font-weight:600;display:inline-flex;box-shadow:0 6px 16px #00000026}.bk-typing{gap:4px;padding:14px 16px;display:inline-flex}.bk-typing i{background:#8da9ec;border-radius:50%;width:7px;height:7px;animation:1.2s ease-in-out infinite bk-dot}.bk-typing i:nth-child(2){animation-delay:.15s}.bk-typing i:nth-child(3){animation-delay:.3s}@keyframes bk-dot{0%,80%,to{opacity:.5;transform:translateY(0)}40%{opacity:1;transform:translateY(-5px)}}.bk-suggest{scrollbar-width:none;flex:none;gap:8px;margin:0 -20px 10px;padding:2px 20px;display:flex;overflow-x:auto}.bk-suggest::-webkit-scrollbar{display:none}.bk-suggest .bk-tag{white-space:nowrap;padding:8px 14px;font-size:13px}.bk-error{color:#b91c1c;background:#ffffffe6;border-radius:14px;padding:8px 12px;font-size:13px}