:root{--lb-bg:#f7f7f8;--lb-text:#18181b;--lb-accent:#18181b;--lb-border:#e4e4e7;--lb-input-bg:#ffffff;--lb-msg-bg:#ffffff;--lb-name-color:#18181b;--lb-time-color:#71717a;--lb-font:system-ui, -apple-system, BlinkMacSystemFont, Segoe UI, sans-serif;--lb-font-size:14px;--lb-secondary-font-size:12px;--lb-avatar-size:28px;--lb-icon-size:22px;}