:root{--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--font-mono: ui-monospace, "SF Mono", SFMono-Regular, Menlo, Consolas, monospace;--radius-sm: 6px;--radius-md: 10px;--radius-lg: 14px;--topbar-h: 56px}:root[data-theme=light]{color-scheme:light;--bg: #f6f7f9;--bg-subtle: #eef0f4;--surface: #ffffff;--surface-2: #f3f4f6;--panel: #ffffff;--border: #e5e7eb;--border-strong: #d1d5db;--text: #111827;--text-2: #374151;--muted: #6b7280;--faint: #9ca3af;--accent: #4f46e5;--accent-hover: #4338ca;--accent-soft: rgba(79, 70, 229, .08);--danger: #dc2626;--danger-soft: rgba(220, 38, 38, .07);--warn: #b45309;--warn-soft: rgba(180, 83, 9, .08);--ok: #059669;--input-bg: #ffffff;--code-bg: #f8fafc;--shadow-sm: 0 1px 2px rgba(16, 24, 40, .06);--shadow-md: 0 4px 16px -4px rgba(16, 24, 40, .1);--shadow-lg: 0 12px 40px -12px rgba(16, 24, 40, .18);--topbar-bg: rgba(255, 255, 255, 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var(--border)}.feature-grid{grid-template-columns:1fr}.container h1{font-size:27px}.topbar{padding:0 12px}}