:root{--app-bg:#f5f7fb;--surface:#fff;--surface-muted:#fafafa;--border:#f0f0f0;--border-strong:#e6e6e6;--hover:#f5f7fb;--active:#e6f4ff;--code-bg:#f4f3ec;--quote-border:#d9d9d9;--quote-text:#555}[data-theme=dark]{--app-bg:#16171d;--surface:#1f1f1f;--surface-muted:#141414;--border:#303030;--border-strong:#3a3a3a;--hover:#262626;--active:#111d2c;--code-bg:#2a2a2a;--quote-border:#444;--quote-text:#aaa}*{box-sizing:border-box}html,body,#root{min-height:100vh;margin:0}body{background:var(--app-bg);font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}.app-shell{min-height:100vh}.app-sider{height:100vh;position:sticky;top:0;overflow:auto}.logo-block{border-bottom:1px solid var(--border);padding:16px}.header-bar{background:var(--surface);border-bottom:1px solid var(--border);z-index:10;justify-content:space-between;align-items:center;gap:8px;padding:0 16px;display:flex;position:sticky;top:0}.content-area{padding:24px}@media (width<=768px){.content-area{padding:16px}}@media (width<=480px){.content-area{padding:12px}}.auth-page{place-items:center;min-height:100vh;padding:24px;display:grid}.auth-card{width:100%;max-width:480px}.w-full{width:100%}.space-between{justify-content:space-between}.full-screen-center{place-items:center;min-height:100vh;display:grid}.chat-layout{grid-template-columns:320px 1fr;align-items:start;gap:16px;display:grid}@media (width<=900px){.chat-layout{grid-template-columns:1fr}}.chat-sidebar .dialog-item{cursor:pointer;border-radius:8px;padding:8px;transition:background .15s}.chat-sidebar .dialog-item:hover{background:var(--hover)}.chat-sidebar .dialog-item.active{background:var(--active)}.chat-thread{background:var(--surface-muted);border:1px solid var(--border);border-radius:8px;flex-direction:column;gap:12px;max-height:52vh;padding:8px;display:flex;overflow-y:auto}.chat-bubble{word-break:break-word;border-radius:12px;max-width:80%;padding:10px 12px}.chat-bubble.user{color:#fff;background:#1677ff;align-self:flex-end}.chat-bubble.user .ant-typography{color:#fff}.chat-bubble.bot{background:var(--surface);border:1px solid var(--border-strong);align-self:flex-start}.chat-bot-group{border-left:3px solid var(--border-strong);grid-template-columns:minmax(0,1fr) minmax(250px,340px);align-items:start;gap:12px;width:100%;padding:8px 0 8px 10px;display:grid}.chat-generation-messages{flex-direction:column;gap:8px;min-width:0;display:flex}.chat-generation-side{min-width:0}@media (width<=600px){.chat-bubble,.chat-bot-group{max-width:100%}.chat-bot-group{flex-direction:column;display:flex}.chat-generation-side{width:100%}}.chat-metadata{width:100%}.chat-attachments{flex-wrap:wrap;gap:4px;margin-top:6px;display:flex}.bb-content{line-height:1.5}.bb-content .bb-list{margin:4px 0;padding-left:20px}.bb-content .bb-code{background:var(--code-bg);border-radius:4px;padding:2px 6px;font-family:ui-monospace,Consolas,monospace}.bb-content .bb-quote{border-left:3px solid var(--quote-border);color:var(--quote-text);margin:4px 0;padding:4px 10px}