:root{--bg:#f3f5f8;--surface:#fff;--surface-soft:#f8fafc;--text:#172033;--muted:#667085;--border:#e2e7ef;--border-strong:#cbd3df;--primary:#2563eb;--primary-hover:#1d4ed8;--primary-soft:#eaf1ff;--danger:#dc2626;--success:#22a06b;--shadow:0 10px 35px #0f172a12;--sans:Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif}*{box-sizing:border-box}html{background:var(--bg);min-width:320px}body{background:var(--bg);min-width:320px;min-height:100vh;color:var(--text);font-family:var(--sans);-webkit-font-smoothing:antialiased;margin:0}button,select,textarea,input{font:inherit}button,select{cursor:pointer}button:focus-visible,select:focus-visible,textarea:focus-visible,input:focus-visible{outline-offset:2px;outline:3px solid #2563eb3d}button:disabled,select:disabled,textarea:disabled,input:disabled{cursor:not-allowed;opacity:.55}.app-shell{min-height:100vh}.app-header{z-index:20;border-bottom:1px solid var(--border);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:#f3f5f8eb;grid-template-columns:1fr auto 1fr;align-items:center;gap:20px;width:min(1600px,100% - 32px);min-height:68px;margin:0 auto;display:grid;position:sticky;top:0}.app-name{min-height:44px;color:var(--text);background:0 0;border:0;justify-self:start;padding:0;font-size:18px;font-weight:750}.main-tabs{border:1px solid var(--border);background:#fffc;border-radius:12px;grid-template-columns:1fr 1fr;gap:4px;padding:4px;display:grid}.main-tabs button{min-width:88px;min-height:36px;color:var(--muted);background:0 0;border:0;border-radius:8px;padding:0 18px;font-size:14px;font-weight:650}.main-tabs button[aria-current=page]{background:var(--text);color:#fff}.connection{min-height:44px;color:var(--muted);background:0 0;border:0;justify-self:end;align-items:center;gap:8px;padding:0 10px;font-size:13px;display:inline-flex}.connection i{background:#aab2c0;border-radius:50%;width:8px;height:8px}.connection i.online{background:var(--success);box-shadow:0 0 0 4px #22a06b1f}.app-workspace{grid-template-columns:minmax(0,1fr) 340px;align-items:start;gap:18px;width:min(1600px,100% - 32px);margin:18px auto 28px;display:grid}.main-panel{min-width:0}.chat-panel,.image-panel,.gallery-panel{border:1px solid var(--border);background:var(--surface);box-shadow:var(--shadow);border-radius:18px;overflow:hidden}.chat-panel{grid-template-rows:auto minmax(0,1fr) auto;min-height:calc(100dvh - 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