:root{--lsrag-blue:#315bea;--lsrag-ink:#182641;--lsrag-line:#e3e8f1;--lsrag-muted:#65748d}
.lsrag-personal-save{position:fixed;right:16px;bottom:16px;z-index:19000;max-width:calc(100vw - 32px);padding:10px 14px;display:flex;gap:12px;flex-wrap:wrap;background:#fff8ea;border:1px solid #ead5ad;border-radius:12px;box-shadow:0 3px 14px #18264112}.lsrag-personal-save a{color:#245f9b;text-decoration:underline}
.lsrag-app{font:14px/1.6 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--lsrag-ink);box-sizing:border-box}
.lsrag-app *{box-sizing:border-box}.lsrag-app button,.lsrag-app input,.lsrag-app textarea{font:inherit}.lsrag-app button{cursor:pointer}.lsrag-app button:disabled{cursor:not-allowed;opacity:.55}.lsrag-app button:focus-visible,.lsrag-app input:focus-visible,.lsrag-app textarea:focus-visible{outline:3px solid #c2d1ff;outline-offset:2px}
.lsrag-app button{border:1px solid var(--lsrag-line);background:#fff;color:var(--lsrag-ink);border-radius:9px;padding:7px 12px}.lsrag-app .lsrag-primary{background:var(--lsrag-blue);border-color:var(--lsrag-blue);color:#fff}.lsrag-app .lsrag-danger{color:#ac2540}.lsrag-app p{margin:0 0 10px}.lsrag-app label{display:grid;gap:5px;font-weight:500}.lsrag-app input,.lsrag-app textarea{width:100%;min-width:0;border:1px solid #d9e1ef;border-radius:10px;background:#fff;color:var(--lsrag-ink);padding:10px 12px}.lsrag-app textarea{resize:vertical}.lsrag-app small,.lsrag-muted{color:var(--lsrag-muted);font-size:12px}.lsrag-error{color:#b02b40!important;white-space:pre-wrap}.lsrag-notice{border-radius:9px;padding:10px 12px;background:#f0f4ff;color:#3d5b92;font-size:12px}.lsrag-row{display:flex;gap:8px;align-items:center;flex-wrap:wrap}.lsrag-stack{display:grid;gap:14px}.lsrag-spread{justify-content:space-between}.lsrag-hidden{display:none!important}
#lsrag-toolbar{position:fixed;z-index:18000;left:0;right:0;top:0;width:100%;max-width:none;min-height:52px;padding:8px 20px;border:0;border-bottom:1px solid #dce4f6;border-radius:0;background:#fff;box-shadow:0 2px 8px #1c365b08;display:flex;justify-content:flex-end;align-items:center;gap:8px;flex-wrap:wrap;font-size:12px}#lsrag-toolbar button{padding:4px 8px;font-size:12px}#lsrag-toolbar strong{max-width:190px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.lsrag-badge{display:inline-block;border-radius:20px;background:#e9f0ff;color:#315bea;font-size:11px;padding:2px 7px;white-space:nowrap}
/* The original workspace is exactly 100dvh. Reserve the measured header space
   and subtract it from that shell, preserving all original toolbars and tabs. */
html.lsrag-has-toolbar body{padding-top:var(--lsrag-header-height,52px)}
html.lsrag-has-toolbar #root [data-workspace-shell]{height:calc(100dvh - var(--lsrag-header-height,52px));min-height:0}
html.lsrag-has-toolbar #root [data-workspace-shell][data-scroll-mode=page] ._rail_cqtel_11{height:calc(100dvh - var(--lsrag-header-height,52px))}
html.lsrag-has-toolbar #root [data-workspace-shell][data-scroll-mode=page] ._surface_cqtel_69{min-height:calc(100dvh - var(--lsrag-header-height,52px))}
html.lsrag-has-toolbar #root [data-workspace-shell][data-scroll-mode=page] [data-workspace-notices]{top:calc(var(--lsrag-header-height,52px) + 18px)}
html.lsrag-has-toolbar #linkstar-static-page,html.lsrag-has-toolbar #linkstar-home-view{top:var(--lsrag-header-height,52px);height:calc(100dvh - var(--lsrag-header-height,52px))}
#lsrag-login{position:fixed;inset:0;width:min(430px,calc(100% - 32px));max-height:calc(100dvh - 32px);margin:auto;padding:0;overflow:auto;border:1px solid #e4eaf4;border-radius:20px;background:#fff;box-shadow:0 18px 70px #26395933}#lsrag-login::backdrop{background:#18264166}#lsrag-login .lsrag-login-card{padding:28px}#lsrag-login h2{font-size:22px;line-height:1.4;margin:18px 0 10px}#lsrag-login form{display:grid;gap:14px;margin-top:22px}#lsrag-login button,#lsrag-login input{min-height:44px}#lsrag-login .lsrag-brand{color:#1e548a;font-weight:700;font-size:20px}#lsrag-login .lsrag-muted{font-size:13px}#lsrag-toolbar .lsrag-visitor-note{color:#58697c}#lsrag-toolbar .lsrag-primary{min-height:36px;padding:6px 18px}
html.lsrag-auth-locked body{visibility:hidden!important}
.lsrag-session-ended{visibility:visible!important;position:fixed;inset:0;z-index:2147483647;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px;padding:24px;background:#f5f7fb;color:#20324a;font:14px/1.6 system-ui,sans-serif;text-align:center}.lsrag-session-ended h1{margin:0;font-size:24px}.lsrag-session-ended p{margin:0;color:#65758b}.lsrag-session-ended button{border:0;border-radius:8px;padding:10px 24px;background:#1b5392;color:white;font:inherit;cursor:pointer}.lsrag-session-ended a{color:#1b5392}
[data-linkstar-rag-chat]{height:100%;min-height:300px;min-width:0;width:100%;display:flex;flex-direction:column;overflow:hidden}.lsrag-chat{flex:1;min-height:0;display:flex;flex-direction:column;width:100%;background:#fff}.lsrag-chat-head{padding:18px 18px 12px;border-bottom:1px solid var(--lsrag-line)}.lsrag-chat-title{font-size:18px;font-weight:650}.lsrag-context{margin-top:8px;display:flex;gap:6px;align-items:center}.lsrag-context button{font-size:12px;padding:4px 9px}.lsrag-context button[aria-pressed=true]{background:#eaf0ff;border-color:#c8d6ff;color:#315bea}.lsrag-chat-status{font-size:11px;color:var(--lsrag-muted);margin-top:6px}.lsrag-messages{overflow-y:auto;flex:1;min-height:160px;padding:18px;display:flex;flex-direction:column;gap:15px;scroll-behavior:smooth}.lsrag-message{padding:12px 14px;border-radius:13px;background:#f4f7fc;border:1px solid #ecf0f7;max-width:100%;overflow-wrap:anywhere}.lsrag-message[data-role=user]{background:#edf2ff;border-color:#dce5ff;margin-left:20px}.lsrag-message small{display:block;margin-bottom:5px}.lsrag-message-content{white-space:pre-wrap;line-height:1.8}.lsrag-sources{border-top:1px solid #dce4f2;margin-top:12px;padding-top:9px}.lsrag-source{border-bottom:1px solid #e2e8f2;padding:7px 0;font-size:12px}.lsrag-source summary{cursor:pointer;color:#315bea}.lsrag-source p{white-space:pre-wrap;max-height:260px;overflow:auto;margin:8px 0 0;padding:9px;background:#fff;border-radius:6px}.lsrag-empty{padding:12px 0;color:var(--lsrag-muted)}.lsrag-empty strong{display:block;color:#273955;margin-bottom:8px;font-size:16px}.lsrag-chat-foot{border-top:1px solid var(--lsrag-line);padding:12px 16px 16px;display:grid;gap:8px}.lsrag-chat-foot textarea{min-height:78px;max-height:200px;font-size:13px}.lsrag-chat-foot .lsrag-row button{font-size:12px}.lsrag-busy{padding:8px 12px;color:#315bea;font-size:12px}.lsrag-error-box{padding:8px 12px;background:#fff3f4;border-radius:8px;font-size:12px}.lsrag-error-box button{margin-top:6px}.lsrag-chat-foot .lsrag-row .lsrag-send{margin-left:auto;padding:7px 18px}
/* Teaching replies share the configured expert portrait used by expert cards. */
[data-chat-variant="teaching"] .lsrag-messages { background: #f7f8fa; gap: 20px; }
[data-chat-variant="teaching"] .lsrag-message { display: flex; align-items: flex-start; gap: 12px; align-self: flex-start; width: fit-content; max-width: min(90%, 56rem); min-width: 0; padding: 0; border: 0; border-radius: 0; background: transparent; }
[data-chat-variant="teaching"] .lsrag-message[data-role="user"] { align-self: flex-end; max-width: min(80%, 46rem); margin-left: 0; }
.lsrag-expert-avatar { display: inline-flex; align-items: center; justify-content: center; flex: 0 0 36px; width: 36px; height: 36px; overflow: hidden; border: 1px solid var(--lsrag-line); border-radius: 50%; color: #426ab2; background: #e9edf3; }
.lsrag-expert-avatar img { display: block; width: 100%; height: 100%; object-fit: cover; }
[data-chat-variant="teaching"] .lsrag-message-bubble { position: relative; min-width: 0; padding: 10px 14px; border: 1px solid var(--lsrag-line); border-radius: 10px; background: #fff; }
[data-chat-variant="teaching"] .lsrag-message[data-role="user"] .lsrag-message-bubble { background: #e9f0ff; border-color: #d7e3fb; }
[data-chat-variant="teaching"] .lsrag-message-bubble::before { content: ""; position: absolute; top: 13px; left: -5px; width: 8px; height: 8px; border-left: 1px solid var(--lsrag-line); border-bottom: 1px solid var(--lsrag-line); background: #fff; transform: rotate(45deg); }
[data-chat-variant="teaching"] .lsrag-message[data-role="user"] .lsrag-message-bubble::before { right: -5px; left: auto; border: 0; border-top: 1px solid #d7e3fb; border-right: 1px solid #d7e3fb; background: #e9f0ff; }
[data-chat-variant="teaching"] .lsrag-message-content { line-height: 1.7; }
[data-chat-variant="teaching"] .lsrag-thinking { align-self: flex-start; margin-left: 62px; padding: 10px 0; color: #9b9fa4; font-size: 14px; line-height: 1.7; animation: lsrag-thinking-pulse 2.4s ease-in-out infinite; }
@keyframes lsrag-thinking-pulse { 0%, 100% { opacity: 0.7; } 50% { opacity: 1; } }
[data-chat-variant="teaching"] .lsrag-messages:has([data-streaming="true"]) { scroll-behavior: auto; }
[data-chat-variant="teaching"] .lsrag-message[data-streaming="true"] .lsrag-message-content::after { content: ""; display: inline-block; width: 2px; height: 1em; margin-left: 3px; vertical-align: -0.1em; background: currentColor; opacity: 0.6; }
[data-chat-variant="teaching"] .lsrag-message-bubble > ol { padding-left: 20px; }
@media (max-width: 600px) {
  [data-chat-variant="teaching"] .lsrag-message { max-width: 100%; gap: 10px; }
  [data-chat-variant="teaching"] .lsrag-message[data-role="user"] { max-width: 86%; }
  [data-chat-variant="teaching"] .lsrag-message-bubble { padding: 9px 12px; }
  [data-chat-variant="teaching"] .lsrag-thinking { margin-left: 58px; padding-top: 9px; padding-bottom: 9px; }
}
.lsrag-modal-backdrop{position:fixed;inset:0;z-index:190000;background:#15243e73;display:grid;place-items:center;padding:24px}.lsrag-modal{width:min(760px,100%);max-height:90vh;overflow:auto;border:1px solid #e0e7f2;background:#fff;border-radius:18px;box-shadow:0 20px 80px #12223e33;padding:24px}.lsrag-modal h2{font-size:20px;margin:0}.lsrag-modal h3{font-size:15px;margin:12px 0}.lsrag-modal-header{margin-bottom:16px}.lsrag-doc-list{display:grid;gap:9px;margin-top:14px}.lsrag-doc{border:1px solid var(--lsrag-line);padding:12px;border-radius:10px}.lsrag-doc strong{overflow-wrap:anywhere}.lsrag-doc button{font-size:12px;padding:4px 9px}.lsrag-doc-status{font-size:12px;margin-top:4px;color:var(--lsrag-muted)}.lsrag-file-input{font-size:12px!important;padding:8px!important}.lsrag-model-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.lsrag-model-section{border:1px solid var(--lsrag-line);padding:14px;border-radius:12px;display:grid;gap:10px}.lsrag-model-section h3{margin:0}.lsrag-modal-footer{margin-top:18px}.lsrag-confirm{padding:10px;background:#fff4f3;border-radius:8px;margin-top:8px}.lsrag-auth-locked #root,.lsrag-auth-locked #linkstar-static-page,.lsrag-auth-locked #offline-info-button{visibility:hidden!important}
/* A short/zoomed viewport must retain reachable controls without forcing the
   conversation's 160px minimum below the pane. Each region scrolls locally. */
.lsrag-chat{overflow:hidden}
.lsrag-chat-head{flex:none;min-height:0;max-height:40%;overflow:auto}
.lsrag-messages{min-height:0;overscroll-behavior:contain}
.lsrag-chat-foot{flex:0 1 auto;min-height:0;max-height:65%;overflow:auto;overscroll-behavior:contain}
.lsrag-test-badge{background:#fff0d2;color:#835000}.lsrag-test-notice{background:#fff7e7;color:#835000;margin-top:9px}
.lsrag-mode-control{display:grid;gap:6px}.lsrag-chat .lsrag-depth-switch{display:inline-flex;align-items:center;gap:9px;width:max-content;min-height:40px;padding:6px 11px;font-size:13px;font-weight:600;background:#fff;border-color:#c7d2e4}.lsrag-switch-track{display:inline-block;position:relative;width:30px;height:18px;border-radius:12px;background:#8a97aa;flex:none;transition:background-color 160ms ease}.lsrag-switch-thumb{position:absolute;top:3px;left:3px;width:12px;height:12px;border-radius:50%;background:#fff;transition:transform 160ms ease}.lsrag-chat .lsrag-depth-switch[aria-checked=true]{background:#edf2ff;border-color:#93aaf4;color:var(--lsrag-blue)}.lsrag-depth-switch[aria-checked=true] .lsrag-switch-track{background:var(--lsrag-blue)}.lsrag-depth-switch[aria-checked=true] .lsrag-switch-thumb{transform:translateX(12px)}.lsrag-chat .lsrag-mode-help{font-size:12px;line-height:1.6;color:var(--lsrag-muted);margin:0}.lsrag-mode-notice{padding:7px 10px;background:#f0f4ff;border-radius:7px;color:#315bea;font-size:12px}.lsrag-empty .lsrag-notice button{margin:5px 6px 0 0;font-size:12px}.lsrag-chat .lsrag-depth-switch:focus-visible{outline:3px solid #315bea;outline-offset:3px}
@media(prefers-reduced-motion:reduce){.lsrag-app *{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
@media(max-width:900px){#lsrag-toolbar{padding:7px 10px;gap:5px;justify-content:center}#lsrag-toolbar .lsrag-toolbar-note{display:none}#lsrag-toolbar strong{max-width:120px}html.lsrag-has-toolbar #root [data-workspace-shell][data-scroll-mode=page] ._rail_cqtel_11{height:54px}html.lsrag-has-toolbar #root [data-workspace-shell][data-scroll-mode=page] ._surface_cqtel_69{min-height:calc(100dvh - var(--lsrag-header-height,52px) - 54px)}.lsrag-chat-head{padding:14px}.lsrag-messages{padding:12px}.lsrag-modal-backdrop{padding:12px}.lsrag-modal{padding:18px}.lsrag-model-grid{grid-template-columns:1fr}}