:root{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:#253c36;background:#faf9f5;font-size:18px;line-height:1.65;--green:#176457;--border:#e5e8e0;--muted:#6d7b73;--cream:#f2f1e9}*{box-sizing:border-box}body{margin:0}button,input,textarea,select{font:inherit}button{cursor:pointer}button:disabled,select:disabled{cursor:wait;opacity:.55}button,input,select,textarea{touch-action:manipulation}button{border:0}button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:3px solid #dfaa65;outline-offset:3px}a{color:var(--green)}[hidden]{display:none!important}.primary{background:var(--green);color:white;border-radius:14px;padding:13px 22px;font-weight:600;min-height:50px}.primary:hover{background:#104c41}.secondary{background:var(--cream);border:1px solid var(--border);border-radius:12px;padding:12px;color:#344c42;min-height:48px}.text-button,.icon-button{background:transparent;color:#52695f;min-height:44px;padding:8px 12px;border-radius:10px}.text-button:hover,.icon-button:hover{background:#e9ede4}.icon-button{min-width:44px;font-size:21px}.wide{width:100%}.muted{color:var(--muted)}.small{font-size:14px}.error{color:#a03f2e;min-height:1em;font-size:16px}.eyebrow{font-size:12px;font-weight:600;letter-spacing:2px;color:var(--green)}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.loading{display:grid;place-content:center;height:100dvh;color:var(--green)}.login-view{min-height:100dvh;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px 22px;background:radial-gradient(ellipse at 80% 10%,#e6eddc 0,transparent 50%),#f7f6ee}.login-card{width:min(440px,100%);background:#fffefb;padding:38px;border:1px solid #e4e7dc;border-radius:28px;box-shadow:0 16px 70px #304e3610}.login-card .eyebrow{margin-top:12px}.login-card h1{font-size:32px;line-height:1.35;margin:10px 0}.intro{color:var(--muted);margin:14px 0 28px;font-size:18px}label{display:block;font-size:16px;font-weight:600;margin:16px 0 8px}input{width:100%;border:1px solid #cbd5cb;background:white;border-radius:12px;padding:12px;min-height:50px;color:#253c36}.password-row{position:relative}.password-row input{padding-right:70px}.password-row button{position:absolute;right:3px;top:3px}.login-card .small{margin:24px 0 0;text-align:center}.login-footer{color:#7f897b;font-size:14px;margin-top:30px}.app{display:flex;height:100dvh;overflow:hidden}.sidebar{width:270px;flex-shrink:0;display:flex;flex-direction:column;background:#f0f2e9;border-right:1px solid var(--border);padding:30px 18px 14px}.brand{display:flex;gap:10px;align-items:center;padding:0 6px 30px}.brand strong{display:block;font-size:21px;letter-spacing:1px}.brand span{display:block;font-size:10px;letter-spacing:2px;color:#778577}.new-chat{text-align:left;padding:13px 18px}.history-label{font-size:12px;color:#7c877b;margin:30px 12px 12px}.chat-list{overflow:auto;flex:1;scrollbar-width:thin}.chat-item{width:100%;text-align:left;background:transparent;padding:13px 12px;border-radius:12px;margin:2px 0;color:#4c6157;line-height:1.5}.chat-item span{display:block;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;font-size:15px}.chat-item small{color:#879184;font-size:11px}.chat-item:hover{background:#e6ebdf}.chat-item.active{background:#dfe8d8;color:#204d3e}.empty-history{font-size:14px;color:#7b887a;text-align:center;padding:25px 0}.sidebar-bottom{display:flex;align-items:center;gap:8px;border-top:1px solid #dce2d5;margin-top:20px;padding-top:12px;color:#74816e;font-size:12px}.sidebar-bottom button{margin-left:auto;font-size:14px}.privacy-dot{width:6px;height:6px;border-radius:50%;background:#659171}.main{flex:1;min-width:0;display:flex;flex-direction:column;background:#faf9f5}.topbar{display:flex;align-items:center;justify-content:space-between;min-height:79px;padding:15px 36px;border-bottom:1px solid var(--border)}.topbar-title{display:flex;align-items:center;gap:8px;min-width:0;font-size:16px}.topbar-title>span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.delete-button{font-size:14px;flex-shrink:0}.modelbar{display:flex;align-items:center;gap:12px;padding:12px 36px;font-size:13px;min-height:60px}.modelbar label{margin:0;font-size:13px;font-weight:400;color:#718174;white-space:nowrap}.modelbar select{max-width:min(380px,60%);font-size:14px;border:1px solid #dce2d5;border-radius:20px;padding:8px 30px 8px 14px;color:var(--green);background:#f0f4e9;min-height:42px}.modelbar>span{font-size:11px;color:#82917e}.conversation{flex:1;overflow-y:auto;overscroll-behavior:contain;scrollbar-width:thin;padding:0 28px;scroll-behavior:smooth}.welcome{max-width:740px;margin:28px auto 50px;padding:15px 28px}.welcome-icon{display:inline-flex;align-items:center;justify-content:center;width:56px;height:56px;background:#f2ead5;color:#b08e45;border-radius:18px;font-size:30px}.welcome .eyebrow{margin:24px 0 12px;letter-spacing:1px}.welcome h1{font-family:"Songti SC","Noto Serif CJK SC",serif;font-size:55px;font-weight:500;line-height:1.3;letter-spacing:3px;margin:12px 0 22px}.welcome>p:not(.eyebrow){font-size:17px;color:#7e8679;line-height:1.9}.suggestions{display:flex;gap:10px;flex-wrap:wrap;margin-top:30px}.suggestions button{background:#fffefb;border:1px solid #e1e4d9;color:#61705f;border-radius:12px;font-size:14px;padding:13px 15px;min-height:48px}.suggestions button:hover{border-color:#92af92;background:#f2f5ec}.messages{max-width:780px;margin:0 auto;padding:20px 5px 35px}.message{margin-bottom:30px;max-width:100%}.message-meta{font-size:12px;color:#7e8a7a;margin-bottom:8px;display:flex;gap:10px;align-items:center}.message-body{white-space:pre-wrap;overflow-wrap:anywhere;font-size:18px;line-height:1.95}.message.user{margin-left:auto;width:fit-content;max-width:88%}.message.user .message-body{background:#e9efdf;padding:13px 20px;border-radius:18px 18px 4px 18px;color:#2c4f3f;line-height:1.7}.message.user .message-meta{justify-content:flex-end}.message.assistant{padding:4px 5px}.message.assistant .message-meta:before{content:"家";background:#dde7d6;border-radius:7px;color:#42664b;width:23px;height:23px;text-align:center;font-size:12px;line-height:23px}.message-error{font-size:15px;color:#a65940;background:#faf0e5;padding:10px 14px;border-radius:10px;margin-top:12px}.copy-button{font-size:12px;color:#7b887a;background:transparent;padding:6px 10px;margin:8px 0 0 -10px;min-height:40px;border-radius:8px}.copy-button:hover{background:var(--cream)}.thinking{color:#7c8a76;font-size:17px}.composer-wrap{padding:0 32px max(16px,env(safe-area-inset-bottom));width:100%;max-width:900px;margin:0 auto}.status{color:#8c5a3d;font-size:14px;min-height:22px;margin:4px 0 8px;line-height:1.5}.composer{display:flex;align-items:flex-end;gap:12px;border:1px solid #d5ddcd;border-radius:20px;background:#fffefa;padding:12px;box-shadow:0 4px 18px #2f4f3210}.composer:focus-within{border-color:#7a9d79}.composer textarea{resize:none;flex:1;min-width:0;max-height:150px;min-height:58px;border:0;outline:0;padding:8px 6px;background:transparent;color:#2d483b;line-height:1.6;font-size:18px}.composer textarea:focus-visible{outline:0}.composer textarea::placeholder{color:#929b8a}.send{padding:10px 19px;min-height:48px;border-radius:12px;white-space:nowrap;font-size:16px}.send span{margin-left:9px}.composer-note{display:flex;justify-content:space-between;gap:8px;padding:10px 3px 0;color:#92998a;font-size:11px}.mobile-only{display:none}.drawer-overlay{display:none}dialog{width:min(440px,calc(100% - 32px));max-height:85dvh;overflow:auto;border:1px solid var(--border);border-radius:22px;padding:25px;background:#fffefb;color:#2e473b;box-shadow:0 25px 100px #213e362e}dialog::backdrop{background:#1e332c66}.dialog-heading{display:flex;align-items:center;justify-content:space-between}.dialog-heading h2{margin:0;font-size:23px}details{border-top:1px solid var(--border);padding:20px 0;margin-top:20px}summary{cursor:pointer;font-size:16px}#logout-button{margin-top:12px}
@media(min-width:1300px){.sidebar{width:290px;padding:35px 24px}.topbar{padding-left:48px}.modelbar{padding-left:48px}.welcome{margin-top:55px}}
@media(max-width:760px){.mobile-only{display:inline-flex;align-items:center;justify-content:center}.app{height:100dvh}.sidebar{position:fixed;inset:0 auto 0 0;z-index:20;width:min(310px,85vw);transform:translateX(-100%);transition:transform .2s;padding-top:max(24px,env(safe-area-inset-top))}.brand{padding-bottom:25px}.brand .icon-button{margin-left:auto}.history-open .sidebar{transform:translateX(0)}.history-open .drawer-overlay{display:block;position:fixed;inset:0;background:#263f3659;z-index:19;width:100%;height:100%;border-radius:0}.topbar{min-height:65px;padding:8px 12px;padding-top:max(8px,env(safe-area-inset-top))}.topbar-title{font-size:16px;gap:4px}.delete-button{font-size:12px;padding:8px}.modelbar{gap:9px;padding:8px 18px;min-height:58px}.modelbar>span{display:none}.modelbar select{font-size:13px;max-width:75%;padding-top:7px;padding-bottom:7px}.conversation{padding:0 15px}.welcome{padding:12px 12px;margin-top:14px;margin-bottom:25px}.welcome-icon{width:47px;height:47px;font-size:26px;border-radius:15px}.welcome .eyebrow{margin-top:20px;font-size:12px}.welcome h1{font-size:45px;margin:8px 0 18px}.welcome>p:not(.eyebrow){font-size:16px}.suggestions{display:grid;grid-template-columns:1fr;gap:8px;margin-top:24px;max-width:310px}.suggestions button{text-align:left;font-size:15px;padding:12px 16px}.messages{padding:18px 3px 12px}.message-body{font-size:18px}.message.user{max-width:92%}.message.user .message-body{padding:12px 16px}.composer-wrap{padding-left:12px;padding-right:12px;padding-bottom:max(10px,env(safe-area-inset-bottom))}.composer{border-radius:17px;padding:9px;gap:4px}.composer textarea{font-size:17px;min-height:54px;padding:7px 5px}.send{padding:9px 14px;font-size:16px}.send span{display:none}.composer-note{font-size:10px;padding-top:8px;gap:5px}.status{font-size:13px;margin:2px 2px 6px;min-height:18px}.login-card{padding:30px 25px}.login-card h1{font-size:29px}.login-footer{margin-top:20px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.modelbar{flex-wrap:wrap;gap:10px 18px}.model-field{display:flex;align-items:center;gap:9px;min-width:0}.model-field select{max-width:300px}.modelbar>span{font-size:11px}.context-note{font-size:12px;color:#7b8876;margin:4px 2px;line-height:1.6}.context-note.near-limit{color:#99562f;font-weight:500}@media(max-width:760px){.modelbar{gap:7px;padding-top:8px;padding-bottom:8px}.model-field{width:100%;font-size:13px}.model-field label{min-width:56px}.model-field select{max-width:calc(100% - 70px);padding-top:5px;padding-bottom:5px;min-height:36px}.context-note{font-size:11px}}