:root{color:#111;background:#fff;font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,SF Pro Display,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}*{box-sizing:border-box}html,body,#root{min-width:320px;min-height:100%;margin:0;background:#fff}button,input,textarea{font:inherit}button,a,label{-webkit-tap-highlight-color:transparent}button{border:0}.chat-shell,.login-shell{min-height:100vh;min-height:100svh}.chat-shell{display:grid;grid-template-rows:auto minmax(0,1fr) auto;background:#fff}.chat-header{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;min-height:calc(env(safe-area-inset-top,0px) + 52px);padding:calc(env(safe-area-inset-top,0px) + 8px) 14px 8px;background:#ffffffe6;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.logo-button{display:grid;width:36px;height:36px;place-items:center;padding:0;border-radius:12px;background:transparent;cursor:pointer}.logo-mark{display:grid;width:32px;height:32px;place-items:center;color:#fff;border-radius:10px;background:#111;box-shadow:0 8px 22px #0000001f}.chat-scroll{overflow-y:auto;padding:18px 14px}.empty-chat{display:grid;min-height:54svh;place-items:center;align-content:center;gap:14px;color:#6f6f6f;text-align:center}.empty-chat p{width:min(260px,82vw);margin:0;font-size:15px;line-height:1.65}.message-list{display:grid;width:min(100%,760px);margin:0 auto;gap:18px}.message-row{display:flex}.message-row.user{justify-content:flex-end}.message-row.assistant{justify-content:flex-start}.message-bubble{display:grid;max-width:min(86%,520px);gap:10px;font-size:15px;line-height:1.62}.message-bubble p{margin:0;white-space:pre-wrap}.message-row.user .message-bubble{padding:10px 13px;border-radius:18px 18px 4px;background:#f0f0f0;color:#111}.message-row.assistant .message-bubble{color:#111}.message-bubble.error{padding:10px 12px;border-radius:14px;background:#fff2f0;color:#b3261e}.message-bubble.loading{grid-auto-flow:column;width:fit-content;align-items:center;padding:10px 12px;border-radius:16px;background:#f7f7f7;color:#6b6b6b}.message-image{display:block;width:min(100%,360px);max-height:58svh;border-radius:18px;background:#f6f6f6;object-fit:contain;box-shadow:0 10px 32px #00000014}.file-chip{display:inline-flex;width:fit-content;max-width:240px;align-items:center;gap:6px;overflow:hidden;padding:5px 8px;border-radius:999px;background:#ffffffb3;color:#595959;font-size:12px;text-overflow:ellipsis;white-space:nowrap}.download-inline{display:inline-flex;width:fit-content;align-items:center;gap:6px;padding:7px 11px;color:#111;border:1px solid #e5e5e5;border-radius:999px;background:#fff;font-size:13px;font-weight:650;cursor:pointer}.composer-bar{position:sticky;bottom:0;z-index:10;display:grid;gap:8px;padding:8px 12px calc(env(safe-area-inset-bottom,0px) + 10px);background:linear-gradient(to top,#fff 82%,#fff0)}.pending-upload{display:flex;width:min(100%,760px);margin:0 auto;align-items:center;gap:8px;padding:7px 8px;border:1px solid #e9e9e9;border-radius:16px;background:#fff;box-shadow:0 8px 24px #00000012}.pending-upload img{width:34px;height:34px;border-radius:10px;object-fit:cover}.pending-upload span{min-width:0;flex:1;overflow:hidden;color:#4f4f4f;font-size:13px;text-overflow:ellipsis;white-space:nowrap}.pending-upload button{display:grid;width:26px;height:26px;place-items:center;color:#4f4f4f;border-radius:999px;background:#f3f3f3;cursor:pointer}.thinking-line{width:min(100%,760px);margin:0 auto;color:#7a7a7a;font-size:12px;text-align:center}.chat-composer{display:grid;grid-template-columns:auto minmax(0,1fr) auto;width:min(100%,760px);min-height:50px;margin:0 auto;align-items:end;gap:8px;padding:7px;border:1px solid #e4e4e4;border-radius:26px;background:#fff;box-shadow:0 10px 30px #00000014;transition:border-radius .16s ease,box-shadow .16s ease}.chat-composer input[type=file]{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}.icon-action,.send-button{display:grid;width:36px;height:36px;place-items:center;padding:0;border-radius:999px;cursor:pointer}.icon-action{color:#4a4a4a;background:#f4f4f4}.send-button{color:#fff;background:#111}.send-button:disabled{color:#9c9c9c;background:#eee;cursor:not-allowed}.chat-composer textarea{width:100%;height:34px;max-height:168px;min-height:34px;padding:7px 2px;color:#111;border:0;outline:0;background:transparent;line-height:1.45;overflow-y:hidden;resize:none;scrollbar-width:thin}.chat-composer textarea::placeholder{color:#8d8d8d}.login-shell{display:grid;place-items:center;padding:calc(env(safe-area-inset-top,0px) + 22px) 22px calc(env(safe-area-inset-bottom,0px) + 22px);background:#fff}.login-panel{display:grid;width:min(100%,390px);gap:24px;padding:26px;border:1px solid #e8e8e8;border-radius:24px;background:#fff;box-shadow:0 18px 60px #00000014}.login-form{display:grid;gap:14px}.login-form label{color:#555;font-size:14px;font-weight:700}.password-row{display:flex;align-items:center;gap:10px;height:52px;padding:0 14px;border:1px solid #e6e6e6;border-radius:16px;background:#fafafa}.password-row svg{color:#6d6d6d;flex:0 0 auto}.password-row input{width:100%;color:#111;border:0;outline:0;background:transparent}.send-login{display:inline-flex;height:46px;align-items:center;justify-content:center;gap:8px;color:#fff;border-radius:16px;background:#111;font-weight:700;cursor:pointer}.send-login:disabled{color:#9c9c9c;background:#eee;cursor:not-allowed}.error-text{margin:0;color:#b3261e;font-size:13px;line-height:1.5}.spin{animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}@media(min-width:760px){.chat-header,.chat-scroll,.composer-bar{padding-inline:24px}}