:root{color-scheme:dark;--bg:#0b1020;--panel:#121a2e;--panel2:#17223a;--line:#283550;--text:#f4f7ff;--muted:#a5b1c9;--accent:#8da8ff;--accent2:#6e86f7;--green:#72d6ad;--danger:#ff8795;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:radial-gradient(ellipse at 50% -15%,#253458 0%,var(--bg) 52%);color:var(--text)}body{min-height:100dvh}button,input,textarea,select{font:inherit}button{cursor:pointer}.shell{width:min(100%,980px);min-height:100dvh;margin:0 auto;padding:0 22px;display:flex;flex-direction:column}.topbar{height:76px;display:flex;align-items:center;gap:18px;border-bottom:1px solid rgba(158,178,220,.14)}.brand{display:flex;align-items:center;gap:11px;color:inherit;text-decoration:none}.brand-mark{width:40px;height:40px;border-radius:14px;background:linear-gradient(145deg,#a7baff,#6e83ed);display:grid;place-items:center;color:#0d1530;font-weight:900;font-size:21px;box-shadow:0 7px 24px #7087ef44}.brand strong,.brand small{display:block}.brand strong{font-size:15px;letter-spacing:.12em}.brand small{color:var(--muted);font-size:12px;margin-top:2px}.secure-label{margin-left:auto;color:#b5c1d9;font-size:12px;display:flex;align-items:center;gap:8px}.secure-dot{display:inline-block;width:8px;height:8px;background:var(--green);border-radius:50%;box-shadow:0 0 12px #72d6ad80}.ghost-button{border:1px solid var(--line);color:#dce4f7;background:#17223a;border-radius:11px;padding:9px 14px}.login-wrap{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:52px 0}.login-card{width:min(100%,480px);padding:34px;border:1px solid #31405d;border-radius:24px;background:linear-gradient(150deg,#18233b,#11192b);box-shadow:0 28px 90px #0005}.eyebrow{color:var(--accent);font-size:12px;font-weight:700;letter-spacing:.12em;text-transform:uppercase}.login-card h1{margin:12px 0 9px;font-size:30px;letter-spacing:-.04em}.intro{margin:0 0 26px;color:var(--muted);font-size:14px;line-height:1.7}.login-form label,.model-wrap label{display:block;margin-bottom:8px;font-size:13px;color:#cbd5e8}.login-form input{width:100%;height:52px;padding:0 15px;color:var(--text);background:#0b1222;border:1px solid #34425e;border-radius:13px;outline:none}.login-form input:focus,textarea:focus,select:focus{border-color:var(--accent);box-shadow:0 0 0 3px #8299ff22}.login-form input::placeholder,textarea::placeholder{color:#73809b}.primary-button{width:100%;height:50px;margin-top:14px;border:0;border-radius:13px;color:#11182c;font-weight:750;background:linear-gradient(100deg,#a7bbff,#8198ff);box-shadow:0 8px 22px #7189f43d}.primary-button span{float:right;font-size:20px;margin-top:-3px}.error-message{min-height:20px;margin:12px 0 0;color:var(--danger);font-size:13px}.privacy-note{display:flex;gap:10px;margin-top:16px;padding:13px;border-radius:12px;background:#0d1628;color:#aab7d0;font-size:12px;line-height:1.65}.footnote,.site-footer{color:#71809d;font-size:12px;text-align:center}.footnote{margin:18px 0 0}.chat-panel{flex:1;min-height:0;display:flex;flex-direction:column;padding-top:18px;padding-bottom:14px}.chat-toolbar{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:12px 15px;border:1px solid var(--line);border-radius:16px;background:#121a2ee8}.model-wrap{min-width:0}.model-wrap label{font-size:11px;margin-bottom:5px}.model-wrap select{max-width:min(68vw,460px);height:38px;padding:0 34px 0 11px;border:1px solid #354360;border-radius:10px;background:#0c1425;color:var(--text)}.connection-status{display:flex;align-items:center;gap:8px;color:#b9c7df;font-size:12px;white-space:nowrap}.messages{flex:1;min-height:260px;overflow:auto;padding:22px 4px;scroll-behavior:smooth}.welcome-card{min-height:260px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:var(--muted)}.welcome-icon{width:52px;height:52px;display:grid;place-items:center;border-radius:18px;background:#8198ff22;color:#a5b8ff;font-size:27px}.welcome-card h2{margin:16px 0 5px;color:#e6ecfb;font-size:20px}.welcome-card p{margin:0;font-size:13px}.message{max-width:min(82%,720px);margin:0 0 17px;padding:13px 16px;border-radius:17px;white-space:pre-wrap;overflow-wrap:anywhere;line-height:1.7;font-size:14px}.message.user{margin-left:auto;background:linear-gradient(130deg,#748af0,#6478dc);color:white;border-bottom-right-radius:5px}.message.assistant{margin-right:auto;background:#17233b;border:1px solid #2b3955;color:#edf2ff;border-bottom-left-radius:5px}.message.error{color:#ffc2c8;border-color:#6b3545}.message-label{margin-bottom:5px;color:#b8c6e5;font-size:10px;letter-spacing:.08em;text-transform:uppercase}.composer{position:relative;display:flex;align-items:flex-end;gap:10px;padding:13px 13px 28px;border:1px solid #33415e;border-radius:20px;background:#141d31;box-shadow:0 12px 40px #0003}.composer textarea{width:100%;min-height:42px;max-height:160px;resize:none;border:0;outline:none;background:transparent;color:var(--text);padding:10px 4px;line-height:1.5}.composer textarea:focus{box-shadow:none}.send-button{flex:0 0 42px;width:42px;height:42px;border:0;border-radius:14px;background:linear-gradient(140deg,#a6baff,#7c91fa);color:#121a31;font-size:23px;font-weight:800}.send-button:disabled,.primary-button:disabled{opacity:.55;cursor:wait}.composer-hint{position:absolute;left:17px;bottom:8px;color:#72809c;font-size:10px}.site-footer{padding:10px 0 15px}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}[hidden]{display:none!important}
@media(max-width:600px){.shell{padding-left:14px;padding-right:14px}.topbar{height:64px}.brand-mark{width:36px;height:36px;border-radius:12px}.secure-label{font-size:11px}.login-wrap{padding:30px 0}.login-card{padding:25px 20px;border-radius:20px}.login-card h1{font-size:27px}.chat-panel{padding-top:12px}.messages{padding:16px 1px}.message{max-width:92%;font-size:14px}.composer{border-radius:17px;padding:9px 10px 28px}.site-footer{padding-bottom:max(12px,env(safe-area-inset-bottom))}}