:root{--bg: #f4f5f7;--panel: #ffffff;--border: #d1d5db;--text: #1a1a2e;--text-secondary: #6b7280;--accent: #3d66ff;--accent-light: #eef2ff;--danger: #ef4444;--success: #22c55e;--warning: #f59e0b;--radius: 10px;--shadow: 0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text);font-size:14px;line-height:1.5}.app{display:flex;flex-direction:column;min-height:100vh}.topbar{display:flex;align-items:center;gap:16px;padding:0 24px;height:56px;background:var(--panel);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100}.brand{display:flex;align-items:center;gap:8px;font-size:18px;font-weight:700;color:var(--accent);cursor:pointer;background:none;border:none}.topnav{display:flex;gap:4px}.topnav button{padding:6px 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56px)}.content{flex:1;padding:24px;overflow-y:auto}.side-section{margin-bottom:8px}.side-section-head{display:flex;align-items:center;justify-content:space-between;width:100%;padding:8px 12px;border:none;background:none;cursor:pointer;font-size:13px;font-weight:600;color:var(--text-secondary)}.side-title{display:flex;align-items:center;gap:8px}.side-children{padding-left:8px}.side-item{display:block;width:100%;text-align:left;padding:7px 12px;border:none;background:none;cursor:pointer;font-size:13px;color:var(--text);border-radius:6px;transition:all 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var(--border);padding:4px 8px}.chat-bubble-markdown a{color:var(--accent);word-break:break-all}.chat-bubble-markdown hr{border:none;border-top:1px solid var(--border);margin:10px 0}.chat-bubble-markdown code{background:#0000000f;padding:1px 5px;border-radius:4px;font-family:SF Mono,Fira Code,monospace;font-size:12.5px}.chat-bubble-markdown pre.code-block{margin:0 0 8px}.chat-bubble-markdown pre.code-block code{background:none;padding:0;border-radius:0;font-size:12px;color:inherit}.playground-attach-bar{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:8px}.attach-chip{display:inline-flex;align-items:center;gap:6px;padding:3px 8px 3px 3px;border:1px solid var(--border);border-radius:20px;font-size:12px;background:var(--panel);color:var(--text-secondary);max-width:220px}.attach-chip img{width:22px;height:22px;border-radius:4px;object-fit:cover;flex-shrink:0}.attach-chip-name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.attach-chip 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var(--border);border-radius:10px;padding:10px;margin-top:8px}.playground-input{flex:1;border:none;outline:none;resize:none;font-size:14px;font-family:inherit;line-height:1.5;max-height:120px}.playground-send{padding:8px;border-radius:8px;flex-shrink:0}.playground-disclaimer{text-align:center;font-size:11px;color:var(--text-secondary);margin-top:8px}@media(max-width:900px){.playground{flex-direction:column;height:auto}.playground-params{width:100%}.playground-suggestions{grid-template-columns:1fr}}@media(max-width:768px){.sidebar{display:none}.content{padding:16px}.topbar{padding:0 12px}}