:root{--ink:#16283c;--muted:#7b8593;--blue:#355ee8;--line:#e5e9ee;--canvas:#f3f5f8;--soft:#eef2ff;--radius:14px}*{box-sizing:border-box}body{margin:0;background:#fff;color:var(--ink);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;font-size:14px}button,input,select,textarea{font:inherit}button,a,select{touch-action:manipulation}button{cursor:pointer;border:0;background:transparent;color:inherit}button:disabled{opacity:.4;cursor:not-allowed}a{text-decoration:none;color:inherit}button,input,select,textarea,a{outline-offset:3px}button:focus-visible,a:focus-visible{outline:2px solid var(--blue)}.hidden{display:none!important}.shell{display:grid;grid-template-columns:218px minmax(400px,1fr) 358px;height:100vh;height:100dvh;overflow:hidden}.sidebar{background:#f8f9fb;border-right:1px solid var(--line);padding:26px 18px;display:flex;flex-direction:column}.brand{display:flex;gap:11px;align-items:center;font-size:20px;font-weight:750;letter-spacing:-.5px}.brand-mark{height:36px;width:36px;display:grid;place-items:center;border-radius:11px;background:var(--ink);color:#fff;font-weight:800;font-size:24px;box-shadow:3px 3px 0 #b4c3fa}.brand small{display:block;font-size:10px;font-weight:450;letter-spacing:2px;color:var(--muted);margin-top:4px}.new-button{width:100%;margin:34px 0 28px;background:#fff;border:1px solid var(--line);border-radius:9px;height:42px;font-weight:600;text-align:left;padding-left:18px;box-shadow:0 2px 3px #15283c04}.new-button:hover{border-color:#a8b9ed}.sidebar-label{font-size:11px;letter-spacing:1px;color:var(--muted);display:flex;justify-content:space-between;padding:0 10px;margin-bottom:12px}#projects{overflow:auto;flex:1}.project-item{width:100%;text-align:left;padding:12px 10px;border-radius:9px;margin-bottom:5px;display:flex;gap:10px;align-items:center}.project-item.active{background:#e9edf6}.project-item:hover{background:#edf0f5}.project-icon{font-size:18px;color:#68758d}.project-copy{overflow:hidden}.project-copy strong{display:block;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-weight:550}.project-copy small{display:block;color:var(--muted);font-size:10px;margin-top:6px}.sidebar-bottom{border-top:1px solid var(--line);padding:20px 8px 0;font-size:11px;color:#667383}.sidebar-bottom small{display:block;font-size:10px;margin:8px 0 0 12px}.status-dot{display:inline-block;background:#51ab86;width:6px;height:6px;border-radius:50%;margin-right:7px}.workspace{min-width:0;overflow:auto;background:var(--canvas);padding:0 28px 20px}header{min-height:92px;display:flex;align-items:center;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line)}.eyebrow{font-size:9px;font-weight:700;letter-spacing:2px;color:#7c8999}.title-wrap{min-width:0}h1{font-size:18px;line-height:1.4;font-weight:650;letter-spacing:-.4px;margin:7px 0 0;max-width:450px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}.header-actions{display:flex;gap:9px;align-items:center;flex-shrink:0}.quality-badge{font-size:9px;color:#687597;letter-spacing:1px;margin-right:4px}.primary{background:var(--blue);color:white;font-weight:600;padding:11px 17px;border-radius:8px;box-shadow:0 4px 8px #355ee812;white-space:nowrap}.primary:hover{background:#244ccf}.secondary{background:white;border:1px solid #dce1e9;padding:10px 13px;border-radius:8px;font-size:12px;white-space:nowrap}.secondary:hover{border-color:#aab8d4}.small{padding:7px 11px;font-size:11px}.download-wrap{position:relative}.download-menu{position:absolute;top:44px;right:0;min-width:205px;z-index:5;background:#fff;border:1px solid var(--line);box-shadow:0 8px 30px #16283c15;border-radius:10px;padding:6px}.download-menu a{display:block;padding:12px 10px;font-size:12px;border-radius:6px}.download-menu a:hover{background:var(--soft)}.stage-top{display:flex;justify-content:space-between;align-items:center;padding:22px 0 16px;color:var(--muted);font-size:11px}.version-wrap{display:flex;align-items:center;gap:9px}.version-wrap select{background:transparent;border:0;color:var(--ink);font-size:11px;max-width:160px}.canvas{position:relative;aspect-ratio:16/9;background:#fff;border:1px solid #e0e5ed;box-shadow:0 8px 28px #20304a08;border-radius:10px;display:flex;align-items:center;justify-content:center;overflow:hidden;min-height:260px}#slide-image{display:block;width:100%;height:100%;object-fit:contain}.welcome{text-align:center;padding:25px}.welcome h2{font-size:clamp(24px,2.4vw,36px);line-height:1.35;letter-spacing:-1px;font-weight:650;margin:14px 0}.welcome p{font-size:12px;line-height:1.9;color:var(--muted);margin:0 0 23px}.welcome .primary{font-size:12px;padding:11px 17px}.format-list{font-size:9px;color:#9aa3af;margin-top:14px;letter-spacing:.3px}.welcome-art{height:86px;width:135px;position:relative;margin:0 auto 16px}.paper{position:absolute;border-radius:6px;width:73px;height:54px;top:15px;left:30px;border:1px solid #d6ddec}.paper.back{background:#f7f8fd;transform:rotate(-17deg);left:16px;top:17px}.paper.middle{background:#eaf0fe;transform:rotate(12deg);left:48px;top:11px}.paper.front{background:#fff;box-shadow:0 5px 10px #466fd515;top:26px}.paper.front i,.paper.front b,.paper.front em{display:block;height:4px;border-radius:3px;background:#e3eaf9;margin:9px 10px 0}.paper.front i{width:34px;background:#5277ef}.paper.front b{width:50px;margin-top:6px}.paper.front em{width:39px;margin-top:5px}.spark{color:#3b66e8;position:absolute;right:3px;top:0;font-size:24px}.canvas-loader{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;gap:10px;background:#fff9;color:var(--muted);font-size:12px}.spinner{width:18px;height:18px;border:2px solid #dce5ff;border-top-color:var(--blue);border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.slide-controls{display:flex;align-items:center;justify-content:center;gap:10px;margin:15px 0}.slide-controls #slide-title{font-size:12px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis;flex:1;text-align:center}.icon-button{font-size:17px;border-radius:6px;padding:5px 8px;line-height:1}.icon-button:hover{background:#edf1f8}.thumbnails{display:flex;gap:13px;overflow-x:auto;padding:15px 1px;min-height:90px}.thumbnail{width:128px;flex-shrink:0;text-align:left;padding:0}.thumbnail img{width:100%;aspect-ratio:16/9;object-fit:contain;display:block;border-radius:5px;border:2px solid transparent;background:white;box-shadow:0 2px 5px #16283c08}.thumbnail.active img{border-color:var(--blue)}.thumbnail span{display:block;color:var(--muted);font-size:10px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin:7px 2px}.thumbnail.active span{color:var(--blue)}.notes-panel{background:white;border:1px solid var(--line);border-radius:10px;padding:20px;margin:15px 0}.notes-header{display:flex;justify-content:space-between;align-items:center}.notes-header h3{font-size:13px;margin:0}.notes-header span{color:var(--muted);font-size:11px}.notes-columns{display:grid;grid-template-columns:1fr 1fr;gap:25px}.notes-columns h4{font-size:11px;color:var(--muted);font-weight:500}.notes-columns p{font-size:12px;line-height:1.9;white-space:pre-wrap;color:#4a5668}.conversation{display:flex;flex-direction:column;min-height:0;border-left:1px solid var(--line);background:#fff}.conversation-heading{padding:25px 23px 20px;border-bottom:1px solid var(--line)}.conversation-heading h2{font-size:16px;font-weight:650;margin:0 0 6px}.conversation-heading span{font-size:11px;color:var(--muted)}.sources{padding:10px 18px;border-bottom:1px solid var(--line)}.section-row{display:flex;justify-content:space-between;align-items:center}.plain{font-size:11px;color:#68758a;padding:7px 0}.plain:hover{color:var(--blue)}#file-count{background:#eff2f7;font-size:10px;padding:2px 6px;margin-left:5px;border-radius:4px}.file-list{max-height:150px;overflow:auto}.file-empty{border:1px dashed #dfe4ed;padding:16px 8px;color:#939caa;font-size:11px;text-align:center;border-radius:7px;margin:8px 0}.file-item{display:flex;align-items:center;gap:8px;padding:8px 3px}.file-symbol{width:26px;height:30px;background:#eef2ff;color:#4467c9;display:grid;place-items:center;font-size:8px;font-weight:600;border-radius:4px}.file-copy{flex:1;min-width:0}.file-copy b{display:block;font-size:11px;font-weight:500;white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.file-copy small{display:block;margin-top:4px;color:var(--muted);font-size:9px}.file-copy small.warn{color:#ac752a}.file-remove{color:#8b97a8;font-size:16px}.upload-progress{color:var(--blue);font-size:10px;padding:7px 0}.settings{padding:9px 22px;border-bottom:1px solid var(--line)}#settings-toggle{width:100%;display:flex;justify-content:space-between}.settings-grid{padding:7px 0 10px;display:grid;gap:11px}.settings label{font-size:10px;color:var(--muted);display:block;position:relative}.settings input,.settings select{display:block;width:100%;padding:9px 10px;margin-top:5px;border:1px solid #e4e8ef;border-radius:6px;color:#4b5970;font-size:11px;background:#fff;height:35px}.field-row{display:grid;grid-template-columns:1fr .9fr .9fr;gap:10px}.field-row input{padding-right:25px}.unit{position:absolute;right:9px;bottom:11px;font-size:9px;color:#a0a8b4}.messages{flex:1;overflow-y:auto;min-height:100px;padding:20px 20px 5px;scroll-behavior:smooth}.intro-message{font-size:12px;line-height:1.9;color:#637087}.assistant-avatar{display:grid;place-items:center;border:1px solid #e2e8fb;background:#f5f7ff;color:var(--blue);width:25px;height:25px;border-radius:7px;font-size:14px}.intro-message p{margin:12px 0 18px}.suggestion{display:block;border:1px solid #e7eaf0;border-radius:7px;width:100%;padding:11px 10px;text-align:left;font-size:11px;margin:8px 0;color:#64728b}.suggestion:hover{border-color:#b3c1ee;background:#f8faff}.message{font-size:12px;line-height:1.8;margin-bottom:18px;white-space:pre-wrap;word-break:break-word}.message.user{background:#f0f3fa;margin-left:25px;padding:12px 14px;border-radius:10px 10px 0 10px;color:#304259}.message.assistant{padding-left:0;color:#5a687d}.message.assistant .assistant-avatar{margin-bottom:9px}.message-time{display:block;color:#a6aeba;font-size:9px;margin-top:7px}.composer{border:1px solid #dce2ec;border-radius:12px;margin:12px 17px 0;padding:12px 12px 9px;box-shadow:0 3px 12px #18284105}.composer:focus-within{border-color:#9caeed;box-shadow:0 0 0 3px #355ee808}.composer textarea{width:100%;resize:none;max-height:180px;min-height:65px;border:0;outline:none;font-size:12px;line-height:1.8;color:var(--ink)}.composer textarea::placeholder{color:#9ba4b2}.composer-bottom{display:flex;justify-content:space-between;align-items:center;font-size:9px;color:#a2abba}.send-button{height:30px;width:30px;border-radius:8px;background:var(--blue);color:white;font-size:20px}.composer-footnote{text-align:center;color:#a7afba;font-size:9px;padding:10px 0 17px}.selection-tag{font-size:10px;display:flex;align-items:center;gap:4px;color:#4263b7;background:#eff3ff;padding:6px 8px;border-radius:5px;margin-bottom:9px}.selection-tag button{margin-left:auto;font-size:16px}.job{padding:12px 20px 0}.job-top{display:flex;gap:12px;justify-content:space-between;font-size:10px;color:#5670a5}.progress-track{height:3px;background:#edf0f7;border-radius:3px;margin:9px 0 2px;overflow:hidden}.progress-track div{height:100%;background:var(--blue);transition:width .5s}.job.error .progress-track div{background:#c06c5a}.job.error .job-top{color:#a66051}.drop-overlay{position:fixed;inset:12px;z-index:30;display:grid;place-items:center;background:#edf3fff2;border:3px dashed #6484df;border-radius:16px;pointer-events:none;text-align:center;color:#3f64cb}.drop-overlay div{font-size:55px}.drop-overlay h2{font-size:28px;margin:20px 0 10px}.drop-overlay p{font-size:14px;color:#657aab}.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%);max-width:600px;background:#192c45;color:white;padding:13px 22px;border-radius:9px;box-shadow:0 5px 25px #13294622;z-index:80;font-size:13px}.login{position:fixed;inset:0;background:#f4f6fa;z-index:100;display:grid;place-items:center}.login-card{width:min(420px,90vw);padding:40px;background:white;border:1px solid var(--line);box-shadow:0 20px 60px #1c36540a;border-radius:20px}.login-card h1{margin-top:28px;font-size:24px;max-width:none}.login-card p{font-size:12px;line-height:1.7;color:var(--muted);margin:12px 0 25px}.login-card input{width:100%;padding:13px;border:1px solid #dce3ec;border-radius:8px;margin-bottom:14px}.login-card .primary{width:100%;display:flex;justify-content:space-between}.error{color:#b0594c!important}.presentation{position:fixed;inset:0;background:#0c1420;z-index:70;display:flex;align-items:center;justify-content:center}.presentation img{max-width:100%;max-height:100%;object-fit:contain}.presentation-bar{position:absolute;bottom:18px;display:flex;gap:15px;align-items:center;padding:8px 16px;border-radius:30px;background:#16273bd9;color:white;font-size:12px}.presentation-bar button{color:#fff;padding:5px 10px}@media(min-width:1700px){.shell{grid-template-columns:238px minmax(500px,1fr) 390px}.workspace{padding-left:42px;padding-right:42px}.welcome h2{font-size:40px}}@media(max-width:1250px){.shell{grid-template-columns:175px minmax(360px,1fr) 320px}.sidebar{padding:24px 13px}.brand{font-size:18px}.quality-badge{display:none}.workspace{padding:0 18px 18px}.welcome-art{height:62px;transform:scale(.8);margin-bottom:8px}.welcome h2{font-size:27px}.welcome p{font-size:11px;margin-bottom:15px}.welcome .eyebrow{font-size:8px}}@media(max-width:1000px){.shell{grid-template-columns:minmax(350px,1fr) 315px}.sidebar{display:none}.workspace{padding:0 18px}.welcome-art{display:none}header{min-height:80px}.title-wrap h1{max-width:220px;font-size:15px}.header-actions{gap:6px}.primary,.secondary{font-size:11px;padding:9px 11px}.notes-columns{grid-template-columns:1fr}}@media(max-width:700px){.shell{display:flex;flex-direction:column;overflow:auto;height:auto;min-height:100dvh}.workspace{overflow:visible;padding-bottom:8px}.conversation{border-top:1px solid var(--line);border-left:0;min-height:650px}.conversation-heading{padding:18px 20px}.stage-top{padding-top:14px}.canvas{min-height:220px}.welcome{padding:20px}.welcome h2{font-size:24px;margin:10px 0}.welcome p{font-size:11px;line-height:1.6;margin-bottom:13px}.format-list{margin-top:8px}.welcome .eyebrow{display:none}.title-wrap .eyebrow{font-size:7px;letter-spacing:1px}h1{max-width:180px!important}.header-actions #present{display:none}.thumbnails{min-height:0;padding:8px 0}.thumbnail{width:90px}.messages{max-height:400px;min-height:180px}.notes-panel{padding:14px}.slide-controls{gap:4px}.slide-controls #slide-title{font-size:10px}.settings-grid{grid-template-columns:1fr 1fr}.settings-grid>.field-row{grid-row:2;grid-column:1/-1}.settings-grid>label{align-self:end}.drop-overlay{inset:4px}.toast{width:90vw}.composer{margin-bottom:0}.file-list{max-height:110px}.sidebar{display:none}}