:root{--nav:#163647;--bg:#f6f8fa;--paper:#fff;--ink:#203c4a;--muted:#697e89;--accent:#177f80;--line:#dfe7eb;--sans:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;--display:"Songti SC","STSong","SimSun",serif}
.interaction{background:white;border:1px solid var(--line);border-radius:10px;padding:18px;margin-top:18px}.interaction h3{font-size:15px;margin:0 0 10px}.interaction p{color:var(--muted);font-size:12px;line-height:1.7}.interaction label{display:block;font-size:12px;margin:12px 0}.interaction input{display:block;width:100%;margin-top:6px;padding:9px;border:1px solid var(--line);border-radius:5px;font:inherit}.interaction input[type=checkbox]{width:auto}.interaction button{padding:9px 14px;margin:10px 8px 0 0;border-radius:6px;color:var(--accent);border:1px solid var(--line)}
*{box-sizing:border-box}body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--bg);display:flex;height:100dvh;overflow:hidden}button,textarea{font:inherit}button{cursor:pointer}button:disabled{opacity:.48;cursor:wait}button,a,textarea{touch-action:manipulation}button:focus-visible,a:focus-visible,textarea:focus-visible{outline:3px solid #53acab;outline-offset:3px}[hidden]{display:none!important}button{border:0;background:none;color:inherit}
aside{width:264px;flex:none;background:var(--nav);color:#e5eff1;padding:34px 20px 16px;display:flex;flex-direction:column;height:100%;z-index:20}.brand{display:flex;gap:12px;align-items:center;text-decoration:none;color:#fff;font-size:25px;letter-spacing:2px;font-weight:650;padding:0 6px 34px}.brand-symbol{width:42px;height:48px;border:1px solid #8dafb7;border-radius:8px 8px 18px 18px;display:grid;place-items:center;font-family:var(--display);font-size:24px;letter-spacing:0}.brand small{display:block;font-weight:400;font-size:10px;letter-spacing:1px;color:#adc7ce;margin-top:5px}.new-session{display:flex;gap:10px;align-items:center;justify-content:center;background:#e2eeed;color:#163c43;padding:12px;border-radius:9px;font-weight:600}.new-session span{font-size:24px;line-height:1}nav{margin:26px 0 28px;display:grid;gap:5px}nav button{padding:13px 14px;text-align:left;color:#b9cdd3;border-radius:8px;font-size:14px;display:flex;gap:13px}nav button span{width:18px;font-size:19px;line-height:20px}nav button.selected,nav button:hover{background:#294a5b;color:white}.history-heading{font-size:11px;color:#92aeb7;display:flex;justify-content:space-between;padding:0 12px 12px}.history-heading button{font-size:17px;line-height:14px}.history-list{overflow-y:auto;min-height:0;flex:1}.history-list button{display:block;width:100%;padding:11px 12px;text-align:left;font-size:12px;white-space:nowrap;text-overflow:ellipsis;overflow:hidden;color:#b8ced5;border-radius:7px}.history-list button.active{background:#294a5b;color:#fff}.history-list button:hover{color:white}.history-list .empty{font-size:12px;color:#97b2bc;padding:16px 10px;line-height:1.7}.sidebar-footer{margin-top:auto;padding-top:22px}.access-note{font-size:11px;color:#bdcfd5;padding:12px;display:flex;align-items:center;gap:8px}.access-note i{width:6px;height:6px;background:#79b9ac;border-radius:100%}.account-button{width:100%;display:flex;align-items:center;gap:10px;padding:13px 10px;border-top:1px solid #3a5563;font-size:13px}.account-button>span:last-child{margin-left:auto}.user-monogram{display:grid;place-items:center;background:#3a5b68;border-radius:100%;width:28px;height:28px;font-size:11px}
main{min-width:0;flex:1;display:flex;flex-direction:column;overflow:hidden}.workspace-header{height:78px;flex:none;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);padding:0 44px;font-size:13px;background:var(--paper)}.header-divider{color:#a0b1b8;padding:0 14px}#session-title{color:var(--muted);max-width:40vw;display:inline-block;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;vertical-align:bottom}.free-badge{border:1px solid #cfe3dd;color:#427765;background:#f3faf7;border-radius:5px;font-size:11px;padding:5px 10px}.icon-button{display:none}.page{flex:1;min-height:0}.chat-page{display:flex;flex-direction:column}.chat-scroll{flex:1;overflow-y:auto;scroll-behavior:smooth;padding:0 max(32px,calc((100% - 820px)/2))}.welcome{padding:clamp(36px,7vh,90px) 0 32px;max-width:760px;margin:auto}.welcome-sign{display:inline-block;color:var(--accent);font-size:12px;padding-bottom:17px;border-bottom:2px solid #8bbab5;margin-bottom:24px}.welcome h1{font-family:var(--display);font-size:clamp(28px,3.4vw,44px);line-height:1.5;font-weight:600;letter-spacing:1px;margin:0 0 20px}.welcome p{font-size:14px;color:var(--muted);line-height:1.9;margin:0}.starter-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 28px;margin:32px 0 22px}.starter{border-top:1px solid var(--line);padding:17px 0;display:flex;text-align:left;gap:12px;align-items:center}.starter:hover strong{color:var(--accent)}.starter>span:first-child{width:36px;height:36px;display:grid;place-items:center;border-radius:8px;background:#e8eef1;color:#567b8b;font-size:17px}.starter strong{font-weight:600;font-size:13px}.starter small{display:block;color:var(--muted);font-size:11px;margin-top:5px;line-height:1.5}.starter b{margin-left:auto;font-weight:400;color:#9aaeb5}.welcome .welcome-footnote{font-size:11px;color:#889aa3}
.composer{margin:10px max(32px,calc((100% - 820px)/2)) 0;background:var(--paper);border:1px solid #c8d8df;border-radius:13px;box-shadow:0 6px 22px #16364708;flex:none;padding:16px 18px 10px}.composer:focus-within{border-color:#67a3a4;box-shadow:0 0 0 3px #177f800b}.composer textarea{display:block;width:100%;border:0;outline:none;background:none;resize:none;min-height:48px;max-height:140px;color:var(--ink);font-size:14px;line-height:1.7}.composer textarea:focus-visible{outline:none}.composer textarea::placeholder{color:#8a9ba4}.composer-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-top:8px}.composer-bottom>span{font-size:10px;color:#95a4ac}.composer-bottom button{color:white;background:var(--accent);border-radius:7px;padding:9px 15px;font-size:12px;white-space:nowrap}.composer-bottom button span{margin-left:10px}.composer-note{color:#98a7ae;font-size:10px;text-align:center;margin:12px 16px 18px}
.message{padding:25px 0;border-bottom:1px solid #e8eef1}.message-name{display:flex;align-items:center;gap:9px;font-size:11px;color:var(--muted);margin-bottom:12px}.message-name .mark{display:grid;place-items:center;width:24px;height:24px;border-radius:7px;background:var(--nav);color:white;font-size:10px}.message.user .mark{background:#e0eaee;color:var(--ink)}.message-body{font-size:14px;line-height:1.95;overflow-wrap:anywhere}.message.user .message-body{white-space:pre-wrap;color:#42616e}.message.assistant .message-body{color:#253f4b}.message .delivery{display:block;text-align:left;margin-top:12px;padding:14px 18px;border:1px solid var(--line);border-radius:8px;background:white;width:100%;color:var(--accent);font-size:13px}.message .delivery small{display:block;color:var(--muted);margin-top:6px}.markdown h1,.markdown h2,.markdown h3{line-height:1.55;font-size:1.15em;margin:1.2em 0 .5em}.markdown p{margin:.5em 0}.markdown table{border-collapse:collapse;display:block;overflow:auto;max-width:100%;font-size:12px}.markdown th,.markdown td{border:1px solid var(--line);padding:8px 12px}.markdown blockquote{border-left:3px solid #85b2ae;margin:15px 0;padding-left:15px;color:var(--muted)}.markdown pre{overflow:auto;background:#edf2f5;border-radius:7px;padding:14px}.markdown a{color:var(--accent)}.progress{padding:24px 0;display:flex;align-items:center;gap:10px;color:var(--muted);font-size:12px}.progress button{color:var(--accent);text-decoration:underline}.pulse{width:7px;height:7px;border-radius:50%;background:var(--accent);animation:breathe 1.5s infinite}.subtle{font-size:12px;color:var(--accent);padding:12px}.older{display:block;margin:auto}
.content-page{overflow:auto;padding:50px clamp(22px,5vw,80px)}.page-intro{max-width:700px;margin-bottom:36px}.section-mark{color:var(--accent);font-size:12px}.page-intro h1{font-family:var(--display);font-size:32px;line-height:1.5;font-weight:600;margin:17px 0}.page-intro p{font-size:13px;line-height:1.9;color:var(--muted)}.discovery-list{display:grid;grid-template-columns:1fr 1fr;gap:22px;max-width:1000px}.discovery{padding:26px;background:white;border:1px solid var(--line);border-radius:10px}.discovery .category{font-size:11px;color:var(--accent)}.discovery h2{font-size:19px;line-height:1.6;margin:12px 0}.discovery p{color:var(--muted);font-size:13px;line-height:1.8}.discovery button{color:var(--accent);font-size:12px;padding:10px 0}.works-list{max-width:1000px}.work{background:white;border:1px solid var(--line);border-radius:9px;margin-bottom:14px;padding:23px;display:flex;align-items:center;gap:18px}.work-icon{font-size:24px;color:#67959c}.work h2{font-size:16px;margin:0 0 8px}.work p{font-size:12px;color:var(--muted);margin:0}.work button{color:var(--accent);margin-left:auto;border:1px solid var(--line);padding:8px 14px;border-radius:6px;font-size:12px}.empty-state{padding:48px 24px;border:1px dashed #c5d5dc;border-radius:10px;text-align:center;color:var(--muted);font-size:14px;line-height:1.9}.empty-state button{display:block;margin:16px auto 0;color:var(--accent)}.profile-panel{background:white;border:1px solid var(--line);border-radius:12px;max-width:800px;padding:30px}.profile-panel h2{font-size:20px;margin:0 0 13px}.profile-panel p{font-size:13px;color:var(--muted);line-height:1.8}.profile-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:28px}.profile-facts span{display:block;font-size:11px;color:var(--muted);margin-bottom:9px}.profile-facts strong{font-size:13px;font-weight:500}.profile-actions{max-width:800px;margin:28px 0;display:grid}.profile-actions button{display:flex;justify-content:space-between;border-bottom:1px solid var(--line);padding:18px 4px;font-size:13px}.privacy-note{font-size:12px;color:var(--muted);line-height:1.9;max-width:650px}
dialog{border:1px solid var(--line);border-radius:14px;width:min(860px,calc(100% - 28px));max-height:88dvh;padding:0;color:var(--ink);background:var(--paper)}dialog::backdrop{background:#102c3b88}.dialog-header{display:flex;align-items:center;justify-content:space-between;padding:18px 24px;border-bottom:1px solid var(--line);position:sticky;top:0;background:white}.dialog-header h2{font-size:17px;margin:0}.dialog-header button{font-size:24px;padding:2px 8px}#document-body{padding:20px 28px;font-size:14px;line-height:1.9}.dialog-footer{position:sticky;bottom:0;background:white;padding:14px 24px;border-top:1px solid var(--line);text-align:right}.dialog-footer button{background:var(--accent);color:white;border-radius:6px;padding:10px 18px;font-size:12px}#toast{position:fixed;bottom:32px;left:50%;transform:translateX(-50%);background:var(--nav);color:white;border-radius:8px;padding:13px 20px;font-size:13px;z-index:40;max-width:90vw}.sr-only{position:absolute;width:1px;height:1px;padding:0;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@keyframes breathe{50%{opacity:.25}}@media(prefers-reduced-motion:reduce){*{animation:none!important;scroll-behavior:auto!important}}
@media(max-width:800px){aside{position:fixed;left:0;top:0;width:280px;transform:translateX(-100%);transition:transform .2s ease}body.drawer-open aside{transform:none}.drawer-shade{position:fixed;inset:0;background:#102c3b80;z-index:19}.icon-button{display:block;padding:10px 12px 10px 0}.workspace-header{height:62px;padding:0 20px;justify-content:flex-start;gap:7px;font-size:12px}.free-badge{margin-left:auto;font-size:10px;padding:4px 7px}.header-divider{padding:0 9px}#session-title{max-width:32vw}.chat-scroll{padding:0 23px}.welcome{padding-top:42px}.welcome h1{font-size:30px}.welcome p{font-size:13px}.starter-grid{gap:0 16px;margin-top:28px}.starter{gap:8px}.starter strong{font-size:12px}.starter small{font-size:10px}.starter>span:first-child{width:29px;height:32px;flex:none}.starter b{display:none}.welcome .welcome-footnote{font-size:10px}.composer{margin:8px 14px 0;padding:13px 13px 10px}.composer-bottom>span{font-size:9px}.composer-note{margin:10px 14px calc(10px + env(safe-area-inset-bottom));font-size:9px}.composer textarea{font-size:16px}.desktop-break{display:none}.content-page{padding:30px 22px}.page-intro h1{font-size:28px}.discovery-list{grid-template-columns:1fr}.discovery{padding:23px}.work{padding:20px 16px;gap:12px}.work h2{font-size:14px}.profile-panel{padding:24px 20px}.profile-facts{gap:8px}.profile-facts strong{font-size:12px}.message-body{font-size:14px}#document-body{padding:18px}.welcome-sign{margin-bottom:20px}.welcome-footnote{max-width:270px}}