:root{--bg:#0f1115;--bg-elevated:#1a1d24;--bg-elevated-2:#23262e;--border:#2a2d36;--border-strong:#3a3d46;--text:#e8e8ec;--text-dim:#9a9ea8;--accent:#2b5cff;--accent-soft:#2b5cff33;--danger:#ff6b6b;--safe-top:env(safe-area-inset-top,0px);--safe-bottom:env(safe-area-inset-bottom,0px);--safe-left:env(safe-area-inset-left,0px);--safe-right:env(safe-area-inset-right,0px);color-scheme:dark}@media (prefers-color-scheme:light){:root{--bg:#f5f6f8;--bg-elevated:#fff;--bg-elevated-2:#eef0f4;--border:#dde1e8;--border-strong:#c7cdd6;--text:#1a1d24;--text-dim:#6b7280;--accent:#2b5cff;--accent-soft:#2b5cff22;--danger:#e0324d;color-scheme:light}}*{box-sizing:border-box;-webkit-tap-highlight-color:transparent;tap-highlight-color:transparent}body,html{margin:0;padding:0;height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;background:var(--bg);color:var(--text);overscroll-behavior-y:none}button{font-family:inherit;cursor:pointer;-webkit-user-select:none;-moz-user-select:none;user-select:none;touch-action:manipulation;-webkit-appearance:none;-moz-appearance:none;appearance:none;outline:none;position:relative;overflow:hidden;isolation:isolate;transition:transform .14s ease,filter .18s ease,border-color .18s ease}button:hover:not(:disabled){filter:brightness(1.1)}button:active:not(:disabled){transform:scale(.965)}[data-ripple]{position:relative;overflow:hidden;isolation:isolate}.ripple-wave{position:absolute;z-index:0;border-radius:50%;pointer-events:none;background:radial-gradient(circle,hsla(0,0%,100%,.38) 0,hsla(0,0%,100%,.16) 40%,transparent 72%);transform:scale(0);opacity:1;animation:ripple-expand .56s cubic-bezier(.16,1,.3,1) forwards}@keyframes ripple-expand{70%{opacity:.68}to{transform:scale(1);opacity:0}}button:focus-visible{outline:2px solid var(--accent);outline-offset:2px}input,textarea{font-family:inherit;touch-action:manipulation;font-size:16px}a{-webkit-tap-highlight-color:transparent}.app-shell{display:flex;height:100dvh}.sidebar{width:220px;flex-shrink:0;border-right:1px solid var(--border);padding:12px;padding-top:calc(12px + var(--safe-top));padding-left:calc(12px + var(--safe-left));overflow-y:auto;-webkit-overflow-scrolling:touch}.agent-item{padding:10px 12px;border-radius:8px;cursor:pointer;margin-bottom:6px;color:var(--text);touch-action:manipulation;transition:background-color .22s ease,color .22s ease,transform .16s ease}.agent-item:hover{background:color-mix(in srgb,var(--accent-soft) 58%,transparent);transform:translateX(2px)}.agent-item:active{transform:scale(.98)}.agent-item.selected{background:var(--accent-soft)}.chat-main{flex:1 1;min-width:0}.chat-window{max-width:720px;margin:0 auto;padding:16px;padding-top:calc(16px + var(--safe-top));padding-bottom:calc(16px + var(--safe-bottom));display:flex;flex-direction:column;height:100dvh}.agent-header-wrap{flex-shrink:0;max-height:160px;opacity:1;overflow:hidden;transition:max-height .25s ease,opacity .2s ease,margin .25s ease}.agent-header-wrap.collapsed{max-height:0;opacity:0;margin-bottom:-16px;pointer-events:none}.agent-header{position:relative;height:160px;background-color:var(--bg-elevated);background-size:cover;background-position:50%;border-radius:12px;overflow:hidden;display:flex;align-items:flex-end;padding:16px;flex-shrink:0}.agent-header-overlay{position:absolute;inset:0;background:linear-gradient(0deg,rgba(0,0,0,.7),rgba(0,0,0,.1))}.agent-header-content{position:relative;display:flex;align-items:center;gap:12px}.agent-avatar{width:56px;height:56px;border-radius:50%;object-fit:cover;border:2px solid #fff;flex-shrink:0}.agent-avatar-fallback{width:56px;height:56px;border-radius:50%;background:#444;display:flex;align-items:center;justify-content:center;color:#fff;flex-shrink:0}.agent-name{color:#fff;margin:0;font-size:1.3rem;word-break:break-word}.messages{flex:1 1;overflow-y:auto;-webkit-overflow-scrolling:touch;padding:16px 4px}.msg-row{display:flex;margin-bottom:12px;animation:message-arrive .24s cubic-bezier(.22,1,.36,1) both}@keyframes message-arrive{0%{opacity:0;transform:translateY(7px) scale(.985)}to{opacity:1;transform:translateY(0) scale(1)}}.msg-row.user{justify-content:flex-end}.msg-row.assistant{justify-content:flex-start}.msg-bubble{max-width:85%;color:#fff;padding:10px 14px;border-radius:14px;white-space:pre-wrap;word-break:break-word}.msg-bubble.user{background:var(--accent)}.msg-bubble.assistant{background:var(--bg-elevated-2);color:var(--text)}.error-text{color:var(--danger);font-size:14px}.usage-indicator{color:var(--text-dim);font-size:12px;padding:2px 0}.suggested-replies{display:flex;flex-wrap:wrap;gap:8px;padding:8px 0;-webkit-overflow-scrolling:touch}.suggested-btn{background:var(--bg-elevated-2);color:var(--text);border:1px solid var(--border-strong);border-radius:16px;padding:6px 14px;font-size:13px}.suggested-btn:disabled{opacity:.5}.composer{display:flex;gap:8px;padding-top:8px}.composer-input{flex:1 1;min-width:0;padding:10px 14px;border-radius:20px;border:1px solid var(--border-strong);background:var(--bg-elevated);color:var(--text)}.composer-send{padding:10px 20px;border-radius:20px;border:none;background:var(--accent);color:#fff;flex-shrink:0}.composer-send:disabled{opacity:.6}.centered-screen{height:100dvh;display:flex;align-items:center;justify-content:center;padding:16px;text-align:center}.announcement-screen{min-height:100dvh;position:relative;overflow:hidden;display:grid;place-items:center;padding:24px;background:linear-gradient(115deg,rgba(43,92,255,.12),transparent 46%),repeating-linear-gradient(90deg,transparent 0 79px,hsla(0,0%,100%,.025) 80px),var(--bg)}.announcement-glow{position:absolute;width:min(70vw,760px);aspect-ratio:1;border-radius:50%;background:var(--accent);filter:blur(150px);opacity:.13;animation:ambient-drift 7s ease-in-out infinite alternate}.announcement-card{width:min(620px,100%);position:relative;padding:clamp(28px,6vw,58px);border:1px solid color-mix(in srgb,var(--border-strong) 82%,#fff 18%);border-radius:3px 28px 3px 28px;background:color-mix(in srgb,var(--bg-elevated) 88%,transparent);box-shadow:0 36px 100px rgba(0,0,0,.34);-webkit-backdrop-filter:blur(22px);backdrop-filter:blur(22px);animation:notice-enter .62s cubic-bezier(.16,1,.3,1) both}.announcement-kicker{display:flex;align-items:center;gap:10px;color:var(--text-dim);font-size:11px;letter-spacing:.19em}.announcement-kicker span{width:7px;height:7px;border-radius:50%;background:var(--accent);box-shadow:0 0 16px var(--accent)}.announcement-card h1{margin:22px 0 18px;font-family:STSong,Songti SC,Georgia,serif;font-size:clamp(30px,6vw,48px);font-weight:500;letter-spacing:-.035em}.announcement-rule{width:44px;height:2px;background:var(--accent);margin-bottom:24px}.announcement-copy{color:var(--text-dim);font-size:16px;line-height:1.9;white-space:pre-wrap;word-break:break-word}.announcement-enter{margin-top:34px;padding:11px 18px;border:1px solid var(--border-strong);border-radius:999px;background:transparent;color:var(--text)}.announcement-enter span{margin-left:24px;color:var(--accent)}.verification-overlay{position:fixed;z-index:1000;inset:0;display:grid;place-items:center;background:rgba(7,9,13,.58);-webkit-backdrop-filter:blur(8px) saturate(.82);backdrop-filter:blur(8px) saturate(.82);animation:overlay-in .16s ease-out both}.turnstile-slot{display:grid;place-items:center;line-height:0;animation:verification-enter .22s cubic-bezier(.16,1,.3,1) both}.admin-setting-field{display:grid;grid-gap:6px;gap:6px;color:var(--text-dim);font-size:13px}.admin-setting-field input,.admin-setting-field textarea{width:100%;padding:9px 11px;border-radius:8px;border:1px solid var(--border-strong);background:var(--bg);color:var(--text);resize:vertical}.admin-setting-toggle{display:flex;align-items:center;gap:8px;color:var(--text);font-size:14px}@keyframes notice-enter{0%{opacity:0;transform:translateY(18px) scale(.98)}to{opacity:1;transform:none}}@keyframes overlay-in{0%{opacity:0}to{opacity:1}}@keyframes verification-enter{0%{opacity:0;transform:translateY(14px) scale(.96)}to{opacity:1;transform:none}}@keyframes ambient-drift{to{transform:translate3d(8%,-5%,0) scale(1.08)}}@media (max-width:768px){.app-shell{flex-direction:column}.sidebar{width:100%;height:auto;max-height:96px;display:flex;flex-direction:row;gap:8px;overflow-x:auto;overflow-y:hidden;border-right:none;border-bottom:1px solid var(--border);padding:calc(8px + var(--safe-top)) calc(12px + var(--safe-right)) 8px calc(12px + var(--safe-left))}.agent-item{margin-bottom:0;white-space:nowrap;flex-shrink:0}.chat-window{padding:12px;padding-bottom:calc(12px + var(--safe-bottom));height:calc(100dvh - 96px - 8px)}.agent-header-wrap{max-height:120px}.agent-header{height:120px}.msg-bubble{max-width:92%}}@media (prefers-reduced-motion:reduce){*,:after,:before{animation-duration:.01ms!important;animation-iteration-count:1!important;scroll-behavior:auto!important;transition-duration:.01ms!important}}