/* v1.2-font: 全局字体调整为思源黑体 Source Han Sans SC；不内置字体文件，优先使用系统已安装字体，未安装时自动回退到 Noto Sans CJK SC / 微软雅黑。 */

:root{--font-sans:"Source Han Sans SC","Source Han Sans CN","Noto Sans CJK SC","思源黑体","Microsoft YaHei",Arial,sans-serif;--bg:#f6f8fb;--panel:#fff;--text:#101828;--muted:#667085;--line:#e6ebf2;--green:#15965a;--green2:rgba(21,150,90,.12);--shadow:0 18px 45px rgba(16,24,40,.08);--radius:18px;--rail:86px;--kbw:315px;--filew:370px;--top:72px}*{box-sizing:border-box}html,body{height:100%;margin:0;font-family:var(--font-sans);color:var(--text);background:var(--bg)}html[data-theme=dark]{--bg:#0e1117;--panel:#171b22;--text:#f2f4f7;--muted:#98a2b3;--line:#29313d;--shadow:0 18px 45px rgba(0,0,0,.35)}@media(prefers-color-scheme:dark){html[data-theme=system]{--bg:#0e1117;--panel:#171b22;--text:#f2f4f7;--muted:#98a2b3;--line:#29313d;--shadow:0 18px 45px rgba(0,0,0,.35)}}button,input,textarea,select{font:inherit}button{cursor:pointer}.app{height:100vh;display:flex;overflow:hidden}.rail{width:var(--rail);background:var(--panel);border-right:1px solid var(--line);display:flex;flex-direction:column;align-items:center;padding:16px 10px;gap:10px;z-index:8}.brand-mini{height:42px;display:flex;align-items:center}.logo-dot{display:inline-flex;width:34px;height:34px;border-radius:11px;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--green),#ffd65a);color:white;font-weight:900;overflow:hidden}.logo-dot img{width:100%;height:100%;object-fit:cover}.rail-item{width:66px;min-height:62px;border:0;background:transparent;color:var(--text);border-radius:15px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;transition:.18s}.rail-item span{font-size:20px}.rail-item b{font-size:12px;font-weight:700;line-height:1.05}.rail-item:hover,.rail-item.active{background:var(--green2);color:var(--green)}.rail-spacer{flex:1}.layout{flex:1;min-width:0;display:grid;grid-template-columns:var(--kbw) var(--filew) minmax(0,1fr);position:relative;transition:.2s;overflow:hidden}.layout.kb-collapsed{grid-template-columns:42px var(--filew) minmax(0,1fr)}.layout.file-collapsed{grid-template-columns:var(--kbw) 42px minmax(0,1fr)}.layout.kb-collapsed.file-collapsed{grid-template-columns:42px 42px minmax(0,1fr)}.panel{background:var(--panel);border-right:1px solid var(--line);position:relative;min-width:0;overflow:auto;transition:.2s}.kb-panel.collapsed,.file-panel.collapsed{display:none}.panel-toggle{position:absolute;right:12px;top:18px;z-index:4;width:38px;height:38px;border:1px solid var(--line);background:var(--panel);border-radius:14px;color:var(--muted);box-shadow:0 8px 18px rgba(16,24,40,.08);font-size:20px}.collapsed-tab{position:relative;z-index:4;width:42px;min-width:42px;height:100%;background:var(--panel);border:0;border-right:1px solid var(--line);color:var(--muted);display:flex;flex-direction:column;align-items:center;justify-content:flex-start;gap:8px;padding-top:18px;font-weight:800}.collapsed-tab span:not(.tab-icon){writing-mode:vertical-rl;font-size:13px;letter-spacing:2px}.collapsed-tab .tab-icon{font-size:20px;writing-mode:horizontal-tb}.collapsed-tab:hover{color:var(--green);background:var(--green2)}.hidden{display:none!important}.panel-title{padding:26px 28px 14px}.panel-title h2{margin:0 44px 4px 0;font-size:28px;line-height:1.15;word-break:break-word}.file-title h2{font-size:26px}.panel-title small{color:var(--muted);line-height:1.45}.primary{border:0;background:var(--green);color:white;border-radius:16px;padding:13px 20px;font-weight:850;box-shadow:0 12px 20px rgba(21,150,90,.2);letter-spacing:.02em}.primary:hover{filter:brightness(.98);transform:translateY(-1px)}.ghost{border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:14px;padding:11px 16px}.wide{width:calc(100% - 56px);margin:0 28px}.create-main-btn{white-space:normal;line-height:1.18;min-height:58px;font-size:18px}.create-box{margin:14px 28px;padding:18px;border:1px solid var(--line);border-radius:22px;background:linear-gradient(180deg,var(--green2),transparent)}input,textarea,select{border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:14px;padding:13px 16px;outline:none;min-width:0}input:focus,textarea:focus,select:focus{border-color:var(--green);box-shadow:0 0 0 4px color-mix(in srgb,var(--green) 14%,transparent)}textarea{resize:vertical}.create-box input,.create-box textarea{width:100%;margin-bottom:12px}.row{display:flex;gap:10px;align-items:center}.row.end{justify-content:flex-end}.compact button{flex:1}.kb-list{padding:18px 22px;display:flex;flex-direction:column;gap:14px}.kb-card{display:flex;gap:14px;padding:16px;border:1px solid var(--line);border-radius:20px;background:var(--panel);box-shadow:0 8px 24px rgba(16,24,40,.04);position:relative;cursor:pointer;transition:.18s}.kb-card:hover{transform:translateY(-1px);border-color:color-mix(in srgb,var(--green) 40%,var(--line))}.kb-card.selected{background:var(--green2);border-color:color-mix(in srgb,var(--green) 35%,var(--line))}.doc-icon{width:46px;height:46px;border-radius:14px;background:var(--green2);display:flex;align-items:center;justify-content:center}.kb-card b{display:block;margin-bottom:4px}.kb-card small,.kb-card span{display:block;color:var(--muted);font-size:12px;margin:2px 0}.kb-card em{position:absolute;right:12px;top:12px;font-style:normal;background:var(--panel);color:var(--green);border-radius:9px;padding:4px 8px;font-size:12px;font-weight:800}.search-row{display:flex;gap:10px;padding:0 22px}.search-row input{flex:1}.icon-btn{border:1px solid var(--line);background:var(--panel);border-radius:12px;padding:8px 11px;color:var(--muted)}.upload-card{margin:18px 22px;padding:16px;border:1px dashed color-mix(in srgb,var(--green) 30%,#cbd5e1);border-radius:22px;background:color-mix(in srgb,var(--panel) 84%,var(--green2));display:flex;flex-direction:column;gap:12px}.drop-zone{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;min-height:166px;gap:8px;color:var(--muted);cursor:pointer}.drop-zone input{display:none}.drop-zone .cloud{font-size:32px}.drop-zone b{color:var(--text)}.drop-zone em{font-style:normal;background:var(--green);color:white;border-radius:13px;padding:10px 18px;font-weight:800}.drop-zone small{font-size:12px}.toast{padding:12px;border-radius:12px;background:var(--green2);color:var(--green);font-weight:700}.file-head{padding:0 24px 10px;display:flex;justify-content:space-between;color:var(--muted)}.file-list{padding:0 22px 24px;display:flex;flex-direction:column;gap:11px}.file-card{display:flex;align-items:center;gap:12px;padding:13px;border:1px solid var(--line);border-radius:16px;background:var(--panel);transition:.18s}.file-card:hover{border-color:color-mix(in srgb,var(--green) 35%,var(--line));box-shadow:0 8px 20px rgba(16,24,40,.06)}.file-card div{min-width:0;flex:1}.file-card b{display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;font-size:14px}.file-card small{display:block;color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.file-icon{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;color:white;font-size:11px;font-weight:800;background:#98a2b3;flex:0 0 auto}.file-icon.pdf{background:#ef4444}.file-icon.word{background:#3578e5}.file-icon.excel{background:#15965a}.file-icon.txt{background:#64748b}.more,.mini{border:1px solid var(--line);border-radius:10px;background:var(--panel);padding:6px 10px;color:var(--muted)}.workspace{min-width:0;display:flex;flex-direction:column;overflow:hidden}.topbar{height:var(--top);display:flex;justify-content:space-between;align-items:center;padding:0 32px;border-bottom:1px solid var(--line);background:color-mix(in srgb,var(--panel) 96%,var(--green2));flex:0 0 var(--top)}.brand{display:flex;align-items:center;gap:12px;font-size:18px;min-width:0}.brand b{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.top-actions{display:flex;gap:12px;align-items:center}.top-actions select{min-width:220px}.page{display:none;overflow:auto;padding:28px 34px;flex:1}.page.active{display:block}.hero-card{background:var(--panel);border:1px solid var(--line);border-radius:26px;padding:36px 42px;box-shadow:var(--shadow)}.hero-card h1{font-size:38px;margin:0 0 20px}.hero-card p{font-size:18px;color:var(--muted)}.hero-create{display:grid;grid-template-columns:minmax(260px,1fr) 146px;gap:18px;align-items:stretch;margin-top:22px}.hero-create input{font-size:18px}.hero-create button{font-size:22px;line-height:1.15}.kb-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:22px;margin-top:28px}.kb-tile{background:var(--panel);border:1px solid var(--line);border-radius:24px;padding:28px;box-shadow:var(--shadow);cursor:pointer;transition:.18s}.kb-tile:hover{transform:translateY(-2px);border-color:color-mix(in srgb,var(--green) 40%,var(--line))}.kb-tile h2{margin:0 0 24px}.kb-tile p{color:var(--muted)}.kb-tile span{display:inline-block;background:var(--bg);border-radius:16px;padding:7px 13px;margin-right:8px;color:var(--muted)}.section-head h1,.ask-head h1{margin:0 0 8px;font-size:28px}.section-head p,.ask-head p{color:var(--muted);margin:0 0 22px}.ask-page{height:calc(100vh - 128px);display:flex;flex-direction:column;gap:18px}.ask-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}.recommend-bar{display:flex;gap:10px;flex-wrap:wrap}.recommend-bar.few{display:grid;grid-template-columns:1fr;max-width:760px}.recommend-bar.many{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}.recommend-bar button{text-align:left;border:1px solid var(--line);background:var(--panel);border-radius:16px;padding:12px 16px;color:var(--muted);line-height:1.45}.recommend-bar button:hover{color:var(--green);border-color:var(--green);background:var(--green2)}.conversation{flex:1;overflow:auto;padding:8px 0 20px;scrollbar-gutter:stable}.empty-state{display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:var(--muted)}.bot-empty{font-size:64px;background:var(--green2);width:126px;height:126px;border-radius:32px;display:flex;align-items:center;justify-content:center;margin-bottom:26px}.empty-state h2{font-size:34px;color:var(--muted)}.question-bubble{margin-left:auto;max-width:640px;background:var(--green2);padding:18px 22px;border-radius:20px 20px 4px 20px;display:flex;gap:16px;align-items:flex-end}.question-bubble small{color:var(--muted)}.answer-card{margin-top:18px;background:var(--panel);border:1px solid var(--line);border-radius:24px;padding:24px 28px;box-shadow:var(--shadow);max-width:1120px}.answer-head{display:flex;align-items:center;gap:10px;margin-bottom:16px}.bot{font-size:24px}.answer-content{line-height:1.78;font-size:16px}.cite-title{margin-top:24px;padding-top:18px;border-top:1px solid var(--line);font-weight:800}.cite-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin-top:12px}.cite-card{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:15px;padding:12px;background:color-mix(in srgb,var(--panel) 94%,var(--green2))}.cite-card b{display:block;font-size:13px}.cite-card small{color:var(--muted)}.ai-note{margin-top:18px;color:var(--muted);font-size:13px}.ask-box{background:var(--panel);border:1px solid var(--line);border-radius:26px;padding:16px 18px;box-shadow:var(--shadow)}.ask-box textarea{width:100%;min-height:68px;border:0;box-shadow:none;padding:8px;font-size:16px;background:transparent}.ask-tools{display:flex;gap:10px;align-items:center}.ask-tools select,.ask-tools input{height:42px;padding:8px 12px}.ask-tools input{width:70px}.grow{flex:1}.send{width:50px;height:50px;border:0;border-radius:50%;background:var(--green);color:white;font-size:20px;box-shadow:0 10px 18px color-mix(in srgb,var(--green) 25%,transparent)}.ask-box small{color:var(--muted)}.history-drawer{position:fixed;left:var(--rail);bottom:22px;width:330px;max-height:470px;background:var(--panel);border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);z-index:20;padding:18px;transform:translateX(-380px);opacity:0;pointer-events:none;transition:.2s}.show-history .history-drawer{transform:translateX(0);opacity:1;pointer-events:auto}.drawer-head{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:10px}.drawer-head h3{margin:0}.history-search{display:flex;gap:8px;margin:12px 0}.history-search input{flex:1}.history-search button{border:1px solid var(--line);background:var(--panel);border-radius:12px}.history-list{display:flex;flex-direction:column;gap:8px;overflow:auto;max-height:330px}.history-item{padding:12px;border-radius:12px;cursor:pointer}.history-item:hover{background:var(--green2)}.history-item b{font-size:13px;display:block;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.history-item small{color:var(--muted)}.form-card,.edit-card,.table-card{background:var(--panel);border:1px solid var(--line);border-radius:24px;padding:22px;margin-bottom:22px;box-shadow:var(--shadow)}.model-form{display:grid;grid-template-columns:1fr 1fr;gap:14px;align-items:center}.checkline{height:54px;border:1px solid var(--line);border-radius:14px;padding:0 18px;display:grid;grid-template-columns:1fr auto;align-items:center;gap:12px}.checkline span{display:flex;align-items:center;height:100%;line-height:1}.checkline input{width:20px;height:20px;box-shadow:none;margin:0}.provider-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}.provider-card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:16px}.provider-card b,.provider-card small{display:block}.provider-card small{color:var(--muted);margin:8px 0 14px}.result-pre,pre{white-space:pre-wrap;background:#0f172a;color:#e2e8f0;border-radius:18px;padding:18px;overflow:auto}.edit-grid{display:grid;grid-template-columns:repeat(2,minmax(220px,1fr));gap:12px;margin-bottom:16px}.chunkbox{border-top:1px solid var(--line);padding:14px 0}.chunkbox textarea{width:100%;min-height:180px;margin:10px 0}.api-create{display:flex;gap:12px;margin-bottom:16px}.api-create input{min-width:320px}.created-key{background:var(--green2);border:1px solid color-mix(in srgb,var(--green) 28%,var(--line));padding:16px;border-radius:16px;margin-bottom:16px}.created-key code{display:block;margin:10px 0;padding:12px;background:var(--panel);border-radius:12px;word-break:break-all}table{width:100%;border-collapse:collapse}th,td{text-align:left;padding:14px 12px;border-bottom:1px solid var(--line)}th{color:var(--muted);font-weight:800}code{font-family:ui-monospace,SFMono-Regular,Menlo,monospace}.brand-form{display:grid;grid-template-columns:1fr 140px 180px;gap:16px;align-items:end}.brand-form label{display:flex;flex-direction:column;gap:8px;color:var(--muted);font-weight:700}.brand-form label input,.brand-form label select{width:100%;font-weight:400}.logo-upload{grid-column:1 / span 2}.logo-upload small{font-weight:400;color:var(--muted)}.brand-preview{display:flex;align-items:center;gap:12px;border:1px solid var(--line);border-radius:18px;padding:16px;background:var(--bg);grid-column:1 / -1}.theme-card{display:flex;gap:12px}.theme-card button{border:1px solid var(--line);background:var(--panel);border-radius:14px;padding:16px 24px}.modal{position:fixed;inset:0;background:rgba(2,6,23,.38);z-index:50;display:flex;align-items:center;justify-content:center}.modal-box{width:min(720px,92vw);background:var(--panel);border-radius:24px;padding:24px;box-shadow:var(--shadow)}.questions-text{width:100%;min-height:220px;margin:14px 0}.empty-small{color:var(--muted);text-align:center;padding:26px}.muted{color:var(--muted)}
@media(max-width:1180px){.layout{grid-template-columns:280px minmax(0,1fr)}.layout.kb-collapsed{grid-template-columns:42px minmax(0,1fr)}.layout.file-collapsed{grid-template-columns:280px 42px minmax(0,1fr)}.file-panel{display:none}.file-tab{display:flex}.hero-create{grid-template-columns:1fr}.model-form,.brand-form{grid-template-columns:1fr}.logo-upload{grid-column:auto}.ask-page{height:auto;min-height:calc(100vh - 128px)}}@media(max-width:760px){:root{--rail:64px}.rail{width:64px;padding:10px 6px}.rail-item{width:52px;min-height:54px}.rail-item b{display:none}.layout,.layout.kb-collapsed,.layout.file-collapsed,.layout.kb-collapsed.file-collapsed{grid-template-columns:minmax(0,1fr)}.kb-panel{position:fixed;left:64px;top:0;bottom:0;width:82vw;z-index:15;box-shadow:var(--shadow)}.kb-panel.collapsed{display:none}.file-panel{position:fixed;left:64px;top:0;bottom:0;width:86vw;z-index:16;box-shadow:var(--shadow);display:block}.file-panel.collapsed{display:none}.collapsed-tab{position:fixed;left:64px;top:0;bottom:auto;height:54px;width:54px;border:1px solid var(--line);border-radius:0 0 14px 0;padding-top:0;justify-content:center}.file-tab{left:118px}.collapsed-tab span:not(.tab-icon){display:none}.topbar{padding:0 14px}.brand b{display:none}.top-actions{gap:6px}.top-actions select{min-width:145px;max-width:48vw}.page{padding:18px 14px}.hero-card{padding:24px 18px}.hero-card h1{font-size:28px}.question-bubble{max-width:94%;}.ask-head{flex-direction:column}.ask-tools{flex-wrap:wrap}.ask-tools select{flex:1 1 160px}.api-create{flex-direction:column}.api-create input{min-width:0}.table-card{overflow:auto}.history-drawer{left:70px;width:calc(100vw - 90px)}.recommend-bar.few,.recommend-bar.many{grid-template-columns:1fr}.edit-grid{grid-template-columns:1fr}}

/* v1.0 UI polish: 更清晰的字号、柔和色彩、团队共享 */
:root{--bg:#f7f9fc;--panel:#ffffff;--text:#0f172a;--muted:#64748b;--line:#e5eaf1;--shadow:0 16px 42px rgba(15,23,42,.07);--radius:20px}
html,body{font-size:15px;line-height:1.55;-webkit-font-smoothing:antialiased}.panel-title h2,.section-head h1,.ask-head h1{letter-spacing:-.03em;color:var(--text)}.panel-title h2{font-size:25px}.file-title h2{font-size:24px}.section-head h1,.ask-head h1{font-size:30px}.section-head p,.ask-head p,.panel-title small{font-size:14px;color:#66758a}.rail{background:color-mix(in srgb,var(--panel) 96%,var(--green2));}.rail-item{color:#334155}.rail-item b{font-size:12px}.rail-item.active{box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--green) 18%,transparent)}.topbar{position:sticky;top:0;z-index:6;background:color-mix(in srgb,var(--panel) 92%,transparent);backdrop-filter:blur(14px)}.top-actions select{min-width:180px;max-width:280px}.top-actions .context-btn{background:var(--green2);border-color:color-mix(in srgb,var(--green) 22%,var(--line));color:var(--green);font-weight:800}.kb-card,.file-card,.answer-card,.form-card,.table-card,.hero-card,.kb-tile{border-color:color-mix(in srgb,var(--line) 82%,#fff);}.primary{background:linear-gradient(135deg,var(--green),color-mix(in srgb,var(--green) 82%,#10b981));}.ghost:hover,.icon-btn:hover,.mini:hover{border-color:color-mix(in srgb,var(--green) 38%,var(--line));background:var(--green2);color:var(--green)}.panel-toggle{top:14px;right:14px}.collapsed-tab{padding-top:14px}.share-grid{display:grid;grid-template-columns:minmax(280px,1.2fr) minmax(260px,.8fr);gap:22px}.share-options{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin:18px 0}.share-options label{border:1px solid var(--line);border-radius:14px;padding:12px;background:color-mix(in srgb,var(--panel) 94%,var(--green2));}.share-options input{margin-right:6px}.form-card input,.form-card select{margin:7px 0}.wide-full{width:100%;margin:16px 0 0}.join-body{min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at 20% 0%,var(--green2),transparent 32%),var(--bg)}.join-card{width:min(520px,92vw);background:var(--panel);border:1px solid var(--line);border-radius:28px;padding:34px;box-shadow:var(--shadow)}.join-card h1{margin:0 0 12px;font-size:34px}.join-card input{display:block;width:100%;margin:12px 0}.table-card{overflow:auto}.created-key code{font-size:13px}.ask-box{position:sticky;bottom:0}.conversation.empty-state{min-height:360px}.api-create input{flex:1}@media(max-width:980px){.share-grid{grid-template-columns:1fr}.top-actions select{min-width:130px}.top-actions .ghost{padding:9px 10px}.section-head h1,.ask-head h1{font-size:25px}.panel-title h2{font-size:22px}}@media(max-width:760px){html,body{font-size:14px}.top-actions .context-btn{display:none}.top-actions select{max-width:58vw}.page{padding-bottom:118px}.share-grid{gap:14px}.join-card{padding:24px}.rail-item span{font-size:22px}.panel-title{padding:22px 22px 12px}.wide{width:calc(100% - 44px);margin:0 22px}.create-main-btn{font-size:16px}}

/* v1.1 登录注册与多用户视觉优化 */
.auth-body{min-height:100vh;display:grid;place-items:center;background:radial-gradient(circle at 20% 10%,rgba(21,150,90,.12),transparent 28%),linear-gradient(135deg,#f7fbff,#f3fff8);font-family:var(--font-sans);color:#0f172a}
.auth-card{width:min(440px,92vw);background:rgba(255,255,255,.92);border:1px solid rgba(226,232,240,.9);border-radius:28px;padding:34px;box-shadow:0 24px 80px rgba(15,23,42,.12)}
.auth-logo{width:54px;height:54px;border-radius:16px;background:var(--green,#15965a);color:white;display:grid;place-items:center;font-size:28px;font-weight:800;margin-bottom:18px;box-shadow:0 12px 30px rgba(21,150,90,.25)}
.auth-card h1{font-size:28px;line-height:1.2;margin:0 0 10px;color:#0f172a}.auth-card p{color:#64748b;line-height:1.7;margin:0 0 18px}.auth-tabs{display:grid;grid-template-columns:1fr 1fr;background:#f1f5f9;border-radius:14px;padding:4px;margin:18px 0}.auth-tabs button{border:0;background:transparent;border-radius:12px;padding:11px 0;font-size:16px;cursor:pointer;color:#64748b}.auth-tabs button.active{background:#fff;color:#0f172a;font-weight:800;box-shadow:0 5px 16px rgba(15,23,42,.08)}.auth-card input{width:100%;box-sizing:border-box;height:50px;border-radius:15px;border:1px solid #dbe4ef;background:#fff;padding:0 15px;margin:9px 0;font-size:16px}.auth-card input:focus{outline:2px solid rgba(21,150,90,.18);border-color:var(--green,#15965a)}.auth-tip{font-size:13px;color:#94a3b8;background:#f8fafc;padding:10px 12px;border-radius:12px;margin-top:14px}.auth-msg{color:#dc2626;font-weight:700;min-height:22px;margin-top:8px}.user-pill{display:inline-flex;align-items:center;gap:6px;background:rgba(15,23,42,.04);border:1px solid rgba(148,163,184,.22);border-radius:999px;padding:8px 12px;color:#475569;font-size:14px;white-space:nowrap}.top-actions{flex-wrap:wrap}.wide-full{width:100%}
@media (max-width:720px){.auth-card{padding:24px;border-radius:22px}.auth-card h1{font-size:24px}.user-pill{display:none}}


/* v1.3 界面细节优化：按钮字号、上传预览、历史右上角、统一设置入口 */
.create-main-btn{font-size:15px!important;line-height:1.22!important;min-height:54px!important;letter-spacing:.01em}
.kb-panel .create-main-btn{font-size:17px!important;padding:12px 18px!important}
.hero-create button.create-main-btn{font-size:18px!important}
.upload-card{gap:10px!important;padding:14px!important}
.drop-zone{min-height:136px!important;gap:7px!important}
.drop-zone .cloud{font-size:26px!important}
.drop-zone b{font-size:15px!important}
.drop-zone em{font-size:14px!important;padding:8px 16px!important}
.drop-zone small{font-size:11px!important;line-height:1.6}
.upload-card input[name="title"]{font-size:14px!important;height:44px!important;padding:10px 13px!important}
.selected-files-preview{display:flex;flex-direction:column;gap:7px;background:color-mix(in srgb,var(--panel) 82%,var(--green2));border:1px solid color-mix(in srgb,var(--green) 26%,var(--line));border-radius:16px;padding:10px 12px;color:var(--text);font-size:13px}
.selected-files-preview.hidden{display:none!important}
.selected-files-preview b{font-size:13px;color:var(--green)}
.selected-files-preview span{display:flex;justify-content:space-between;gap:10px;border-top:1px dashed var(--line);padding-top:6px;word-break:break-all}
.selected-files-preview em{font-style:normal;color:var(--muted);white-space:nowrap}
.ask-actions{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.history-drawer{left:auto!important;right:34px!important;top:86px!important;bottom:auto!important;transform:translateX(380px)!important}
.show-history .history-drawer{transform:translateX(0)!important}
.rail-settings-wrap{position:relative}
.settings-popover{position:absolute;left:78px;bottom:0;width:178px;background:var(--panel);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:8px;z-index:50;display:flex;flex-direction:column;gap:6px}
.settings-popover.hidden{display:none!important}
.settings-popover button{border:0;background:transparent;color:var(--text);text-align:left;border-radius:12px;padding:10px 12px;font-size:14px;cursor:pointer}
.settings-popover button:hover{background:var(--green2);color:var(--green)}
.top-actions .ghost.context-btn{font-weight:800}
.conversation{min-height:0}
.recommend-bar.hidden{display:none!important}
@media (max-width:1080px){
  :root{--rail:72px;--kbw:260px;--filew:300px}
  .rail-item{width:54px;min-height:56px}.rail-item b{font-size:12px}.rail-item span{font-size:19px}
  .topbar{padding:0 18px}.page{padding:22px 20px}
  .history-drawer{right:16px!important;width:min(330px,calc(100vw - 96px))}
}
@media (max-width:760px){
  .app.shell{height:auto;min-height:100vh;overflow:auto}
  .layout{grid-template-columns:1fr!important;display:block;overflow:visible}
  .rail{position:fixed;left:0;top:0;bottom:0;width:66px;z-index:100}
  .layout,.workspace{margin-left:66px}
  .kb-panel,.file-panel{display:block!important;position:relative;width:auto;max-height:none;border-right:0;border-bottom:1px solid var(--line)}
  .kb-panel.collapsed,.file-panel.collapsed{display:none!important}
  .workspace{min-height:100vh;overflow:visible}
  .topbar{position:sticky;top:0;z-index:20}
  .ask-page{height:auto;min-height:calc(100vh - 120px)}
  .ask-box{position:sticky;bottom:12px}
  .hero-create{grid-template-columns:1fr}.hero-card h1{font-size:30px}
}

/* v1.4.4 focused UI fixes: file fullscreen, minimal settings, IMA-like chat actions */
body.file-focus .layout{grid-template-columns:minmax(340px,520px) minmax(0,1fr)!important;}
body.file-focus .kb-panel,
body.file-focus .kb-tab{display:none!important;}
body.file-focus .file-panel{display:block!important;grid-column:1;background:var(--panel);box-shadow:none;}
body.file-focus .workspace{grid-column:2;}
body.file-focus #page-files{background:var(--bg);}
body.file-focus #page-files .section-head{max-width:860px;margin:0 auto;padding-top:14px;}
body.file-focus #docEditor,
body.file-focus #chunkEditor{max-width:980px;margin:0 auto;}
body.file-focus .upload-card{margin-top:16px;border-style:solid;box-shadow:0 18px 44px rgba(16,24,40,.07);}
body.file-focus .drop-zone{min-height:190px;}
.top-actions .context-btn.top-upload{background:var(--green2);border-color:color-mix(in srgb,var(--green) 34%,var(--line));color:var(--green);font-weight:900;}
.top-actions .context-btn.top-upload::before{content:'↥';margin-right:6px;font-weight:900;}

/* 设置菜单：只保留主题与品牌、退出登录，保持简单不混乱 */
.settings-popover.simple-settings{width:230px;padding:10px;border-radius:20px;gap:8px;}
.settings-popover.simple-settings button{display:flex;align-items:center;gap:12px;padding:12px;border-radius:14px;line-height:1.25;}
.settings-popover.simple-settings button span{width:34px;height:34px;display:grid;place-items:center;border-radius:12px;background:var(--green2);font-size:18px;flex:0 0 auto;}
.settings-popover.simple-settings button b{display:block;font-size:14px;color:var(--text);margin-bottom:3px;}
.settings-popover.simple-settings button small{display:block;font-size:12px;color:var(--muted);}
.settings-popover.simple-settings button.danger span{background:rgba(239,68,68,.1);color:#ef4444;}
.settings-popover.simple-settings button.danger:hover{background:rgba(239,68,68,.08);color:#ef4444;}

/* IMA 风格会话入口：右上角图标 */
.ask-actions.ima-actions{gap:8px;justify-content:flex-end;}
.ima-icon-btn{width:42px;height:42px;border:0;background:transparent;color:#667085;border-radius:14px;display:inline-grid;place-items:center;position:relative;font-size:24px;line-height:1;}
.ima-icon-btn:hover{background:var(--green2);color:var(--green);}
.ima-icon-btn span{position:absolute;right:5px;top:5px;font-size:13px;background:var(--panel);border-radius:999px;line-height:1;color:var(--green);font-weight:900;}
.ima-icon-btn.sun{font-size:25px;color:#ff9f0a;}
.ima-icon-btn.sun:hover{background:rgba(255,159,10,.11);color:#ff9f0a;}
.history-drawer{border:1px solid var(--line);border-radius:22px;background:var(--panel);box-shadow:var(--shadow);max-height:calc(100vh - 128px);overflow:hidden;}
.history-list{max-height:calc(100vh - 250px);overflow:auto;}
.show-history .history-drawer{transform:translateX(0)!important;}

/* 会话开始后让问答区更大、更清爽 */
body.chat-started #recommendBar{display:none!important;}
body.chat-started .ask-head p{display:none;}
body.chat-started .conversation{padding-top:4px;}
body.chat-started .ask-page{gap:10px;}
body.chat-started .ask-head h1{font-size:26px;}
body.chat-started .answer-card{max-width:980px;margin-left:auto;margin-right:auto;}
body.chat-started .question-bubble{max-width:860px;margin-left:auto;margin-right:36px;}

/* 文件列表更明显 */
.file-card{border-radius:18px;}
.file-head{font-weight:800;color:var(--text);}
.file-head span{color:var(--green);}

@media(max-width:1180px){
  body.file-focus .layout{grid-template-columns:minmax(300px,430px) minmax(0,1fr)!important;}
}
@media(max-width:760px){
  body.file-focus .layout{display:block!important;margin-left:66px;}
  body.file-focus .file-panel{position:relative!important;left:auto!important;top:auto!important;bottom:auto!important;width:auto!important;display:block!important;}
  body.file-focus .workspace{margin-left:0!important;}
  .settings-popover.simple-settings{left:62px;bottom:8px;width:220px;}
  .history-drawer{right:10px!important;top:76px!important;width:calc(100vw - 88px)!important;}
  .ima-icon-btn{width:38px;height:38px;}
}

/* v1.4.5 设置中心化：取消左下角弹层，改为中间区域分页签 */
.rail-settings-wrap,.settings-popover{display:none!important;}
.settings-center{max-width:1040px;margin:0 auto;padding:8px 0 40px;}
.settings-main-head{margin-bottom:18px!important;}
.settings-tabs{display:flex;gap:12px;flex-wrap:wrap;background:var(--panel);border:1px solid var(--line);border-radius:22px;padding:10px;margin-bottom:18px;box-shadow:0 14px 40px rgba(16,24,40,.05);}
.settings-tab{border:0;background:transparent;color:var(--muted);border-radius:16px;padding:13px 18px;font-weight:850;display:flex;align-items:center;gap:8px;transition:.18s;}
.settings-tab span{font-size:18px;}
.settings-tab:hover{background:var(--green2);color:var(--green);}
.settings-tab.active{background:var(--green);color:#fff;box-shadow:0 12px 26px rgba(21,150,90,.22);}
.settings-tab.danger-tab.active{background:#ef4444;box-shadow:0 12px 26px rgba(239,68,68,.20);}
.settings-pane{display:none;}
.settings-pane.active{display:block;animation:settingsFade .16s ease-out;}
@keyframes settingsFade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
.settings-card-title{margin-bottom:18px;}
.settings-card-title h2{margin:0 0 6px;font-size:24px;letter-spacing:-.02em;}
.settings-card-title p{margin:0;color:var(--muted);line-height:1.7;}
.questions-settings-card,.logout-card,.brand-form{max-width:780px;margin:0 auto;}
.active-kb-tip{display:inline-flex;align-items:center;gap:6px;margin-bottom:12px;padding:9px 13px;border:1px solid var(--line);border-radius:999px;background:var(--green2);color:var(--muted);}
.active-kb-tip b{color:var(--green);}
.questions-settings-card .questions-text{min-height:260px;width:100%;border:1px solid var(--line);border-radius:18px;background:var(--panel);color:var(--text);padding:16px;line-height:1.7;resize:vertical;}
.logout-user{display:flex;align-items:center;gap:12px;padding:16px;border:1px solid var(--line);border-radius:18px;background:var(--bg);margin:16px 0;}
.logout-user b{display:block;font-size:18px;}
.logout-user small{color:var(--muted);}
.danger-primary{border:0;border-radius:16px;background:#ef4444;color:#fff;font-weight:900;padding:14px 18px;width:100%;box-shadow:0 14px 28px rgba(239,68,68,.18);}
.danger-primary:hover{filter:brightness(.96);}
.recommend-setup-btn{white-space:nowrap;padding:10px 14px!important;border-radius:14px!important;font-weight:800!important;}
body.chat-started .recommend-setup-btn{display:none!important;}
@media(max-width:760px){.settings-center{padding:2px 0 120px}.settings-tabs{gap:8px}.settings-tab{flex:1;justify-content:center;padding:12px 10px;font-size:13px}.settings-card-title h2{font-size:21px}.questions-settings-card,.logout-card,.brand-form{max-width:none}}
/* v1.4.6 account password settings */
.account-form{max-width:780px;margin:0 auto;display:flex;flex-direction:column;gap:14px;}
.account-form label{display:flex;flex-direction:column;gap:8px;color:var(--muted);font-weight:800;}
.account-form input{width:100%;}
.account-readonly{display:grid;grid-template-columns:110px minmax(0,1fr);gap:12px;align-items:center;border:1px solid var(--line);border-radius:16px;padding:14px 16px;background:color-mix(in srgb,var(--panel) 94%,var(--green2));}
.account-readonly span{color:var(--muted);font-weight:800;}
.account-readonly b{font-weight:800;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;}
.account-tip{border:1px solid color-mix(in srgb,var(--green) 26%,var(--line));background:var(--green2);color:var(--green);border-radius:16px;padding:12px 14px;font-weight:700;line-height:1.6;}
@media(max-width:760px){.account-readonly{grid-template-columns:1fr;gap:4px}.account-form{max-width:none}}

/* v1.4.7 上传区推荐问题与复制按钮优化 */
.upload-quick-actions{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:-2px}
.quick-upload-btn,.quick-question-btn{border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:14px;padding:11px 12px;font-weight:850;display:flex;align-items:center;justify-content:center;gap:7px;transition:.18s}
.quick-upload-btn span{width:22px;height:22px;border-radius:999px;display:inline-grid;place-items:center;background:var(--green);color:#fff;font-weight:900;line-height:1}
.quick-upload-btn:hover,.quick-question-btn:hover{border-color:color-mix(in srgb,var(--green) 42%,var(--line));background:var(--green2);color:var(--green);transform:translateY(-1px)}
.copy-toast{position:fixed;left:50%;bottom:38px;transform:translateX(-50%);z-index:9999;background:rgba(16,24,40,.92);color:white;border-radius:999px;padding:10px 16px;font-weight:800;box-shadow:0 16px 36px rgba(16,24,40,.22);animation:copyToast .18s ease-out}
@keyframes copyToast{from{opacity:0;transform:translate(-50%,8px)}to{opacity:1;transform:translate(-50%,0)}}
.created-key{line-height:1.7}
.created-key code{display:inline-block;max-width:100%;word-break:break-all;background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:6px 8px;margin:4px 8px 4px 0}
.created-key button{border:1px solid color-mix(in srgb,var(--green) 42%,var(--line));background:var(--green2);color:var(--green);border-radius:10px;padding:7px 12px;font-weight:850}
@media(max-width:760px){.upload-quick-actions{grid-template-columns:1fr}.copy-toast{bottom:18px}}

/* v1.4.8 用户注册与用户管理优化 */
.auth-card-v148{max-width:460px;width:min(92vw,460px)}
.auth-card-v148 input{width:100%;box-sizing:border-box;margin:10px 0;padding:13px 14px;border:1px solid var(--border,#dfe7ef);border-radius:14px;font-size:15px;background:var(--card,#fff);color:var(--text,#0f172a)}
.auth-card-v148 .auth-msg{min-height:22px;color:#d14343;margin-top:10px;font-size:14px}
.user-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:12px 0}
.user-form-grid input,.user-form-grid select{width:100%;box-sizing:border-box;padding:11px 12px;border:1px solid var(--border,#dfe7ef);border-radius:12px;background:var(--card,#fff);color:var(--text,#0f172a)}
.status-pill{display:inline-flex;align-items:center;padding:3px 9px;border-radius:999px;font-size:12px;font-weight:700}
.status-pill.ok{background:rgba(21,150,90,.12);color:#138451}.status-pill.off{background:rgba(100,116,139,.14);color:#64748b}
.table-card table td .mini{margin-right:6px}
@media(max-width:760px){.user-form-grid{grid-template-columns:1fr}.table-card{overflow:auto}.table-card table{min-width:760px}}