:root{--ink:#1d333b;--muted:#78868d;--teal:#087f86;--line:#e6ebee;--bg:#f7f9fa;--nav:#142c34}*{box-sizing:border-box}body{margin:0;color:var(--ink);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:14px;line-height:1.6}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}button:disabled{cursor:wait;opacity:.55}.hidden{display:none!important}.muted{color:var(--muted)}.eyebrow{font-size:10px;font-weight:700;letter-spacing:2px;color:var(--teal)}.brand{display:flex;align-items:center;gap:11px;font-size:21px;font-weight:700;letter-spacing:-.7px}.brand img{width:33px;height:33px}.login-view{min-height:100vh;display:grid;grid-template-columns:1fr 1fr}.login-story{background:var(--nav);color:white;min-height:100vh;padding:48px 10%;display:flex;flex-direction:column;justify-content:space-between;position:relative;overflow:hidden}.login-story:after{content:"";position:absolute;width:430px;height:430px;border:1px solid #8bcccc20;border-radius:50%;right:-280px;bottom:110px;box-shadow:0 0 0 70px #8bcccc06,0 0 0 140px #8bcccc04;pointer-events:none}.login-story .eyebrow{color:#76c6c5}.login-story h1{font-size:clamp(30px,3.1vw,46px);line-height:1.6;font-weight:600;letter-spacing:1px;margin:26px 0}.login-story p{color:#a9bdc3;font-size:15px;line-height:2.1}.story-tags{display:flex;gap:12px;margin-top:35px}.story-tags span{border:1px solid #ffffff26;border-radius:7px;padding:6px 13px;font-size:12px;color:#c0d7db}.login-story small{color:#91aab1;font-size:11px}.login-panel{display:flex;align-items:center;justify-content:center;padding:40px}.login-panel form{width:340px}.login-panel h2{font-size:28px;margin:15px 0 3px}.login-panel form>p{margin:0 0 32px}.login-panel label{display:block;font-size:13px;font-weight:600;margin:20px 0}.login-panel input{margin-top:9px;width:100%;height:46px;border:1px solid #dce3e6;border-radius:8px;padding:10px 13px;outline:none;background:#fff}.login-panel input:focus{border-color:var(--teal);box-shadow:0 0 0 3px #087f8611}.primary{display:flex;align-items:center;justify-content:space-between;background:var(--teal);color:white;border:0;border-radius:8px;width:100%;padding:13px 18px}.login-note{display:block;text-align:center;font-size:11px;margin-top:24px}.mobile-brand{display:none}.error{color:#b44942;font-size:12px!important;min-height:18px;margin:5px 0 15px!important}.captcha-input{display:flex;gap:10px;align-items:center}.captcha-input button{margin-top:9px;border:1px solid var(--line);border-radius:6px;padding:0;height:46px;background:#f4f7f9}.captcha-input img{height:44px;width:124px;object-fit:contain}.app-view{height:100dvh;display:flex;overflow:hidden}.sidebar{width:224px;background:var(--nav);color:#d1dfe2;display:flex;flex-direction:column;padding:28px 16px 0;flex-shrink:0}.sidebar .brand{color:#fff;padding:0 10px 34px;font-size:20px}.nav-label{color:#91a9b1;font-size:10px;letter-spacing:1px;margin:0 15px 10px}.nav-item{border:0;background:transparent;color:#b6cbd0;width:100%;text-align:left;display:flex;align-items:center;gap:12px;padding:12px 16px;border-radius:7px;margin-bottom:5px;font-size:13px}.nav-item:hover{background:#ffffff08}.nav-item.active{background:#ffffff10;color:#fff}.nav-icon{font-size:18px;width:20px;text-align:center;color:#a9c7cb}.history-heading{display:flex;align-items:center;justify-content:space-between;margin-top:33px}.history-heading .nav-label{margin-bottom:0}.icon-button{border:0;background:transparent;color:var(--muted);font-size:21px;padding:2px 6px;line-height:1.3;border-radius:5px}.icon-button:hover{background:#8799a415}.sidebar .icon-button{color:#9db7bf}.history-list{overflow-y:auto;flex:1;margin-top:10px}.history-item{display:block;background:none;border:0;text-align:left;width:100%;color:#a9c0c7;font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;border-radius:5px;padding:9px 14px}.history-item:hover,.history-item.active{background:#ffffff0a;color:#fff}.history-empty{font-size:11px;color:#78949e;padding:10px 15px}.sidebar-bottom{border-top:1px solid #ffffff10;padding:20px 7px;display:flex;align-items:center;gap:10px}.avatar{background:#36545d;border-radius:50%;width:31px;height:31px;text-align:center;line-height:31px;color:#e1efef;font-size:12px}.sidebar-bottom b{display:block;font-size:12px;font-weight:500}.sidebar-bottom small{display:block;color:#7c9aa4;font-size:10px}.sidebar-bottom button{margin-left:auto}.main-area{flex:1;min-width:0;display:flex;flex-direction:column;background:var(--bg)}.topbar{height:66px;flex-shrink:0;display:flex;justify-content:space-between;align-items:center;padding:0 34px;background:#fff;border-bottom:1px solid var(--line);font-size:12px}.topbar #breadcrumb{color:#87949b}.crumb-divider{color:#c1cbd0;margin:0 13px}.topbar strong{font-weight:500}.online-dot{color:#7b8d91;font-size:10px}.online-dot:before{content:"";display:inline-block;width:6px;height:6px;background:#44a18f;border-radius:50%;margin-right:7px}.home-view{padding:45px 4.5% 30px;overflow-y:auto;flex:1}.home-intro{position:relative;padding:18px 0 36px;overflow:hidden}.home-intro h1{font-size:clamp(30px,3.3vw,48px);font-weight:600;letter-spacing:-1px;line-height:1.5;margin:17px 0}.home-intro h1 span{color:var(--teal)}.home-intro p{color:#7d8c92;font-size:13px}.intro-mark{position:absolute;right:5%;top:25px;width:220px;height:220px;border:1px solid #d8e8e9;border-radius:50%;display:grid;place-items:center;transform:rotate(-15deg)}.intro-mark span{font-size:120px;color:#a8d2d2;font-weight:200;line-height:1}.intro-mark i{position:absolute;inset:25px;border:1px solid #e0ebed;border-radius:50%}.intro-mark i:last-child{inset:-25px;border-style:dashed}.section-heading{display:flex;align-items:center;justify-content:space-between;margin:12px 0 20px}.section-heading h2{font-size:16px;font-weight:600}.section-heading>span{font-size:11px;color:#8c9aa1}.product-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.product-card{display:flex;flex-direction:column;text-align:left;background:#fff;border:1px solid #e2e8eb;border-radius:12px;padding:27px 25px;min-height:264px;transition:transform .18s,box-shadow .18s}.product-card:hover{transform:translateY(-3px);box-shadow:0 10px 30px #1a3c4810;border-color:#a9cecf}.product-glyph{width:47px;height:47px;border-radius:12px;display:grid;place-items:center;font-size:25px;color:var(--teal);background:#e9f4f3}.product-card.analysis .product-glyph{color:#6a729c;background:#f0f0f9}.product-card.ppt .product-glyph{color:#af8551;background:#faf3e8}.product-card h3{font-size:18px;margin:21px 0 8px;font-weight:600}.product-card p{font-size:12px;color:#839097;line-height:1.9;margin:0 0 24px}.card-bottom{margin-top:auto;display:flex;justify-content:space-between;align-items:center;font-size:10px;color:#98a3a9}.card-bottom b{font-size:19px;color:var(--teal);font-weight:400}.home-foot{display:flex;align-items:center;gap:15px;margin-top:30px;border-radius:9px;background:#edf3f4;padding:18px 22px}.small-spark{font-size:29px;color:#74a4a9}.home-foot b{font-size:12px;font-weight:500}.home-foot p{font-size:11px;color:#83959c;margin:3px 0 0}.workspace-view{flex:1;min-height:0;display:flex}.preview-pane{flex:1;min-width:0;display:flex;flex-direction:column}.pane-toolbar{padding:22px 28px 18px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);background:#fff;min-height:87px}.pane-toolbar h2{font-size:16px;margin:3px 0 0;font-weight:600}.pane-toolbar .eyebrow{font-size:8px;color:#8d9ba0}.preview-actions{display:flex;gap:10px;align-items:center}.preview-actions select{font-size:11px;padding:6px;border:1px solid var(--line);border-radius:5px;max-width:112px;background:white;color:var(--muted)}.download-button{background:var(--teal);color:white;font-size:11px;padding:8px 12px;border-radius:6px;white-space:nowrap}.preview-content{overflow-y:auto;flex:1;padding:28px}.preview-empty{height:100%;min-height:350px;display:flex;align-items:center;justify-content:center;flex-direction:column;text-align:center;color:#8d9da5}.empty-art{width:130px;height:155px;border:1px solid #d7e3e6;border-radius:10px;background:white;box-shadow:12px 12px 0 #eaf0f1;display:flex;align-items:center;justify-content:center;font-size:53px;color:#9ec8cb;margin-bottom:33px}.preview-empty h3{font-size:16px;color:#617981;font-weight:500;margin:0 0 10px}.preview-empty p{font-size:12px;line-height:2;margin:0;max-width:330px}.preview-badge{margin-top:24px!important;display:flex;gap:7px;font-size:10px!important;align-items:center;color:#9aa9ae}.preview-badge:before{content:"";height:5px;width:5px;border-radius:50%;background:#9abbc0}.report{background:#fff;border:1px solid var(--line);border-radius:9px;padding:32px 36px;line-height:1.95;font-size:13px;overflow-wrap:anywhere}.report h1{font-size:25px;line-height:1.5;margin:0 0 25px}.report h2{font-size:18px;margin-top:30px}.report h3{font-size:15px;margin-top:24px}.report p{margin:12px 0;color:#40555d}.report table{border-collapse:collapse;font-size:11px;display:block;overflow:auto;margin:20px 0;max-width:100%}.report th,.report td{border:1px solid #dfe7ea;padding:9px 12px;min-width:70px}.report th{background:#f0f5f6;text-align:left}.report img{max-width:100%;height:auto;border-radius:5px}.report blockquote{margin:20px 0;padding:14px 20px;background:#f3f7f8;color:#627880;border-radius:6px}.report pre{background:#f3f5f7;padding:15px;overflow:auto;font-size:11px}.report code{font-family:monospace;font-size:12px}.charts-gallery{display:grid;gap:20px;margin-top:20px}.chart-card{margin:0;border:1px solid var(--line);border-radius:9px;overflow:hidden;background:white;padding:14px}.chart-card img{width:100%;height:auto;display:block}.chart-card figcaption{font-size:11px;color:var(--muted);padding:8px 4px 0}.slide-card{margin:0 0 25px}.slide-card img{width:100%;display:block;border:1px solid #e0e6e9;box-shadow:0 5px 16px #1a3b450a;border-radius:3px}.slide-card figcaption{font-size:11px;text-align:center;margin-top:9px;color:#86989f}.chat-pane{width:365px;min-width:330px;max-width:45%;display:flex;flex-direction:column;background:white;border-left:1px solid var(--line)}.chat-header{display:flex;align-items:center;gap:11px;padding:20px;height:87px;border-bottom:1px solid var(--line)}.assistant-avatar{display:grid;place-items:center;width:35px;height:35px;background:#e4f1f1;border-radius:10px;color:var(--teal);font-size:24px}.chat-header b{font-size:13px;font-weight:600;display:block}.chat-header small{font-size:10px;color:#8fa0a6}.chat-header button{margin-left:auto}.chat-messages{overflow-y:auto;padding:22px 20px 10px;flex:1;min-height:90px}.chat-message{margin-bottom:22px}.message-label{font-size:10px;color:#8da0a7;margin-bottom:8px;display:flex;align-items:center;gap:6px}.message-label span{background:#e5f1f0;color:var(--teal);width:17px;height:17px;text-align:center;border-radius:4px}.message-content{font-size:12px;line-height:1.9;color:#4e636c;overflow-wrap:anywhere;white-space:pre-wrap}.chat-message.user .message-content{background:#f0f5f6;border-radius:8px;padding:12px 14px;color:#334d57}.task-status{margin:4px 20px 10px;font-size:11px;color:var(--teal);display:flex;align-items:center;gap:8px;background:#eef7f6;border-radius:6px;padding:9px 12px}.spinner{border:2px solid #bfdcdc;border-top-color:var(--teal);width:12px;height:12px;border-radius:50%;animation:spin 1s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.existing-files{padding:0 20px;max-height:80px;overflow:auto}.file-chip{display:inline-flex;align-items:center;gap:6px;font-size:10px;color:#6b818a;border:1px solid #e2eaed;border-radius:5px;padding:4px 7px;margin:0 4px 5px 0;max-width:100%;overflow-wrap:anywhere}.file-chip button{background:none;border:0;color:#9aa8b0;padding:0 1px}.composer{margin:10px 17px 0;border:1px solid #dce6e8;border-radius:9px;background:#fcfdfd;padding:11px 12px 8px}.composer:focus-within{border-color:#9fc8c8;box-shadow:0 0 0 2px #087f8605}.composer textarea{width:100%;resize:vertical;max-height:200px;min-height:70px;outline:none;border:0;background:transparent;font-size:12px;line-height:1.8;padding:0;color:var(--ink)}.composer textarea::placeholder{color:#a1adb3}.composer-bottom{display:flex;align-items:center;justify-content:space-between}.attach-button{display:flex;align-items:center;gap:5px;font-size:10px;color:#82969e;cursor:pointer}.attach-button>span:first-child{font-size:19px}.attach-button input{display:none}.send-button{width:30px;height:30px;border:0;border-radius:7px;color:#fff;background:var(--teal);font-size:21px;line-height:1}.upload-hint{font-size:9px;color:#a0aeb4;margin:8px 0 0}.chat-footnote{font-size:9px;color:#a6b2b7;text-align:center;padding:10px 5px 13px}.toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);padding:12px 21px;background:#203a44;color:white;border-radius:8px;font-size:12px;box-shadow:0 5px 25px #0002;z-index:20;max-width:85vw}.pending-files{max-height:110px;overflow:auto}.preview-error{background:#fff4f1;border:1px solid #f3d9d1;padding:15px 20px;border-radius:7px;color:#a55a42;font-size:12px;margin-bottom:20px}
@media(min-width:1600px){.chat-pane{width:420px}.home-view{padding-left:7%;padding-right:7%}.product-card{min-height:285px}.report{padding:40px 50px}}@media(max-width:1100px){.sidebar{width:190px;padding-left:10px;padding-right:10px}.sidebar .brand{font-size:18px}.home-view{padding:30px}.intro-mark{right:0;width:160px;height:160px;top:50px}.intro-mark span{font-size:90px}.product-cards{gap:12px}.product-card{padding:20px 16px}.chat-pane{width:330px;min-width:300px}.preview-content{padding:18px}.report{padding:25px 22px}.pane-toolbar{padding:18px}.preview-actions{gap:5px}.preview-actions select{max-width:90px}}@media(max-width:800px){.sidebar{width:65px;padding:22px 6px 0}.sidebar .brand{padding:0 9px 30px}.sidebar .brand span,.sidebar .nav-label,.sidebar .history-heading,.history-list,.sidebar-bottom>div:not(.avatar),.sidebar-bottom button{display:none}.nav-item{font-size:0;padding:12px;gap:0}.nav-icon{font-size:20px}.sidebar-bottom{padding:15px 10px}.topbar{padding:0 20px}.home-view{padding:25px}.product-cards{grid-template-columns:1fr}.product-card{min-height:180px;padding:22px}.product-card h3{margin-top:12px}.product-card p{margin-bottom:12px}.intro-mark{display:none}.section-heading>span{display:none}.workspace-view{overflow-y:auto;display:block}.preview-pane{min-height:45vh}.preview-content{overflow:visible;max-height:none}.preview-empty{min-height:270px}.empty-art{height:90px;width:80px;font-size:35px;margin-bottom:20px}.chat-pane{width:100%;max-width:100%;border-left:0;border-top:1px solid var(--line);min-height:50vh}.chat-messages{max-height:300px;min-height:150px}.composer{margin-bottom:5px}.topbar .online-dot{display:none}.login-view{grid-template-columns:1fr}.login-story{display:none}.login-panel{min-height:100vh;padding:30px}.mobile-brand{display:block;font-size:24px;font-weight:700;margin-bottom:50px;color:var(--teal)}.home-intro h1{font-size:34px}.home-foot{padding:16px}}