:root{color-scheme:light;--ink:#203a39;--muted:#72817b;--paper:#f6f5ef;--panel:#eeeee6;--line:#ddded3;--accent:#173d3c;--lime:#d6e898;--orange:#ae642f;--red:#a4443f;--shadow:0 16px 48px #203a3910;font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",sans-serif}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-size:15px}button,input,textarea,select{font:inherit}button{cursor:pointer;-webkit-tap-highlight-color:transparent}button:disabled{cursor:wait;opacity:.5}button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:2px solid var(--orange);outline-offset:3px}button{color:inherit}button,select{touch-action:manipulation}.hidden{display:none!important}.eyebrow{font:11px Georgia,serif;letter-spacing:2.5px;color:var(--muted)}.small{font-size:12px;color:var(--muted)}.primary{background:var(--accent);color:white;border:0;border-radius:14px;min-height:50px;padding:12px 22px;display:flex;justify-content:space-between;align-items:center;gap:20px;width:100%}.text-button{border:0;background:none;color:var(--muted);padding:10px;font-size:12px;min-height:42px}.icon-button{border:0;background:transparent;border-radius:10px;min-width:42px;min-height:42px;font-size:23px}.login-screen{min-height:100dvh;display:grid;place-items:center;background:radial-gradient(ellipse at 15% 5%,#d6e89855,transparent 52%),radial-gradient(ellipse at 90% 100%,#d4ddd155,transparent 60%),var(--paper);padding:30px 24px}.login-card{max-width:350px;width:100%;animation:reveal .4s ease-out}.login-card>img{display:block;margin-bottom:32px;border-radius:20px;box-shadow:var(--shadow)}.login-card h1{font-size:42px;font-weight:500;letter-spacing:-2px;margin:15px 0}.login-card>p{color:var(--muted);margin-bottom:38px}.login-card label{display:block;font-size:13px;margin-bottom:10px}.password-row{border:1px solid var(--line);display:flex;border-radius:14px;background:#ffffffaa;margin-bottom:14px;overflow:hidden}.password-row input{width:100%;min-width:0;border:0;background:none;padding:16px;font-size:16px}.password-row button{border:0;background:none;font-size:12px;color:var(--muted);min-width:54px}.login-card .small{text-align:center}.error{color:var(--red);font-size:13px;min-height:20px}.install-tip{font-size:12px;line-height:1.8;color:var(--muted);border-top:1px solid var(--line);padding-top:20px;margin-top:28px}.app{display:flex;height:100dvh;overflow:hidden}.sidebar{width:280px;flex-shrink:0;background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;padding:24px 16px 12px}.brand{display:flex;align-items:center;gap:10px;margin-bottom:28px;font-size:17px}.brand em{font:22px Georgia,serif}.brand img{border-radius:10px}.new-task{background:var(--accent);color:white;border:0;border-radius:12px;min-height:46px;text-align:left;padding:12px 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var(--line);font-size:10px;color:var(--muted);gap:4px;padding-top:10px}.sidebar-footer>span{max-width:140px;overflow:hidden;text-overflow:ellipsis}.main{display:flex;flex-direction:column;min-width:0;flex:1;position:relative;background:radial-gradient(ellipse at 100% 0,#e4e9d933,transparent 50%),var(--paper)}.topbar{min-height:78px;padding:17px 32px;display:flex;align-items:center;border-bottom:1px solid var(--line);gap:12px}.heading{min-width:0;flex:1}.heading strong{display:block;font-size:15px;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:65vw}.connection{display:block;color:var(--muted);font-size:10px;margin-top:5px}.connection.online:before{content:"● ";color:#55816b}.connection.offline{color:var(--red)}.projectbar{display:flex;gap:12px;align-items:center;padding:12px 32px;font-size:11px;color:var(--muted);border-bottom:1px solid #ddded377}.projectbar .label{flex-shrink:0}.projectbar select{border:0;background:transparent;color:var(--ink);font-size:12px;max-width:48%;min-width:80px;outline-offset:0}.model{margin-left:auto;white-space:nowrap}.notice{padding:10px 32px;background:#e9e8da;color:#746240;line-height:1.6;font-size:12px}.conversation{flex:1;min-height:0;overflow:auto;overscroll-behavior:contain;padding:28px max(28px,calc((100% - 820px)/2));scroll-behavior:smooth}.welcome{padding:clamp(30px,7vh,100px) 0 60px;animation:reveal .4s ease-out}.welcome h2{font-weight:400;font-size:clamp(40px,5vw,64px);line-height:1.3;letter-spacing:-2px;margin:22px 0}.welcome p{color:var(--muted);font-size:13px;line-height:1.8}.suggestions{display:flex;gap:10px;flex-wrap:wrap;margin-top:28px}.suggestions button{background:#ffffff88;border:1px solid var(--line);border-radius:30px;padding:12px 16px;font-size:12px}.message{margin:0 0 25px;animation:reveal .2s 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#ccc3b0;border-radius:8px;font-size:16px}.scrim{position:fixed;inset:0;background:#172c3b55;z-index:20;border:0}dialog{border:1px solid var(--line);border-radius:24px;padding:32px;max-width:360px;width:calc(100% - 40px);color:var(--ink);background:var(--paper);box-shadow:var(--shadow)}dialog::backdrop{background:#172c3b66}dialog h2{font-size:22px;font-weight:500}dialog p{font-size:14px;line-height:1.9;color:#68766e}dialog strong{font-weight:500;color:var(--ink)}.dialog-close{position:absolute;right:12px;top:12px}.toast{position:fixed;bottom:110px;left:50%;transform:translateX(-50%);background:#203a39;color:white;padding:12px 18px;border-radius:14px;font-size:13px;max-width:90vw;width:max-content;box-shadow:var(--shadow);z-index:80;line-height:1.6}.mobile-only{display:none}@keyframes reveal{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}@keyframes pulse{50%{opacity:.25}}@media(max-width:760px){.mobile-only{display:block}.sidebar{position:fixed;inset:0 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