单色极简

You are designing in Monochrome style.
- Use ONLY grayscale colors: #111111, #333333, #666666, #999999, #cccccc, #e5e5e5, #f5f5f5, #fafafa, #ffffff
- NEVER use any color with hue (no blue, red, green, pink, orange, etc.)
- Build hierarchy with font-weight contrast: font-light for body, font-bold for headings
- Use generous negative space (py-24, px-8) for breathing room
- Borders must be subtle: grayscale borders in the #e5e5e5 to #cccccc range
- No rounded-full, no heavy shadows, no gradients
- Keep corners sharp: rounded-sm or rounded-none
- Uppercase tracking-wider for labels and small text
- Grid-based alignment for all layouts

## Animation & Interaction Rules

- Deliberate Slowness: 交互应使用 duration-500 到 700 的缓慢节奏，避免快速跳变。
- Grayscale Breathing: 仅允许相邻灰阶过渡（如 #111111 到 #2a2a2a），保持克制。
- Line Growth: 优先使用细线延展作为交互提示，减少大面积反差切换。
- Static Elevation: 避免 translate 和重阴影，维持安静二维平面感。

/* Monochrome */
:root {
  --monochrome-bg: #fafafa;
  --monochrome-text: #111111;
  --monochrome-muted: #666666;
  --monochrome-subtle: #999999;
  --monochrome-border: #e5e5e5;
  --monochrome-surface: #f5f5f5;
}
@keyframes monochrome-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes monochrome-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

.monochrome-card {
  position: relative;
  overflow: hidden;
}

.monochrome-card::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.3s ease;
  background: linear-gradient(135deg, rgba(17, 17, 17, 0.05), transparent);
  pointer-events: none;
}

.monochrome-card:hover::before {
  opacity: 1;
}

.monochrome-gradient {
  background: linear-gradient(135deg, #111111, #666666);
}

.monochrome-gradient-text {
  background: linear-gradient(135deg, #111111, #666666);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.monochrome-frosted {
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  background: rgba(17, 17, 17, 0.08);
}

.monochrome-accent-corner {
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 2rem), calc(100% - 2rem) 100%, 0 100%);
}

.monochrome-animate-in {
  animation: monochrome-fade-in 0.5s ease-out both;
}

{
  "border": {
    "width": "border",
    "color": "border-[#e5e5e5]",
    "radius": "rounded-sm",
    "style": "border-solid"
  },
  "shadow": {
    "sm": "shadow-sm",
    "md": "shadow-sm",
    "lg": "shadow-md",
    "none": "shadow-none",
    "hover": "shadow-sm",
    "focus": "ring-1 ring-[#cccccc]",
    "colored": {}
  },
  "interaction": {
    "transition": "transition-colors duration-200",
    "active": "active:opacity-70",
    "hoverOpacity": "hover:opacity-80"
  },
  "typography": {
    "heading": "font-bold tracking-tight",
    "body": "font-light",
    "mono": "font-mono",
    "sizes": {
      "hero": "text-4xl md:text-6xl lg:text-8xl",
      "h1": "text-3xl md:text-5xl",
      "h2": "text-2xl md:text-4xl",
      "h3": "text-lg md:text-xl",
      "body": "text-sm md:text-base",
      "small": "text-xs"
    }
  },
  "spacing": {
    "section": "py-16 md:py-24",
    "container": "px-6 md:px-8",
    "card": "p-6",
    "gap": {
      "sm": "gap-4",
      "md": "gap-6",
      "lg": "gap-8"
    }
  },
  "colors": {
    "background": {
      "primary": "bg-[#fafafa]",
      "secondary": "bg-[#f5f5f5]",
      "accent": [
        "bg-[#e5e5e5]",
        "bg-[#cccccc]",
        "bg-[#111111]"
      ]
    },
    "text": {
      "primary": "text-[#111111]",
      "secondary": "text-[#666666]",
      "muted": "text-[#999999]"
    },
    "button": {
      "primary": "bg-[#111111] text-[#fafafa]",
      "secondary": "bg-[#f5f5f5] border border-[#e5e5e5] text-[#111111]"
    }
  },
  "forbidden": {
    "classes": [
      "bg-blue-500",
      "bg-red-500",
      "bg-green-500",
      "bg-pink-500",
      "bg-purple-500",
      "bg-yellow-500",
      "bg-orange-500",
      "bg-cyan-500",
      "bg-indigo-500",
      "bg-teal-500",
      "bg-emerald-500",
      "bg-rose-500",
      "text-blue-500",
      "text-red-500",
      "text-green-500",
      "text-pink-500",
      "rounded-full",
      "shadow-lg",
      "shadow-xl",
      "shadow-2xl",
      "bg-gradient-to-r",
      "bg-gradient-to-l",
      "bg-gradient-to-t",
      "bg-gradient-to-b"
    ],
    "patterns": [
      "^bg-(?:blue|red|green|pink|purple|yellow|orange|cyan|indigo|teal|emerald|rose|violet|amber|lime|sky|fuchsia)-",
      "^text-(?:blue|red|green|pink|purple|yellow|orange|cyan|indigo|teal|emerald|rose|violet|amber|lime|sky|fuchsia)-",
      "^border-(?:blue|red|green|pink|purple|yellow|orange|cyan|indigo|teal|emerald|rose|violet|amber|lime|sky|fuchsia)-",
      "^rounded-full$",
      "^shadow-(?:xl|2xl)$",
      "^bg-gradient-"
    ],
    "reasons": {
      "bg-blue-500": "Monochrome style forbids any color with hue; use grayscale only",
      "text-red-500": "Monochrome style forbids any color with hue; use grayscale only",
      "rounded-full": "Monochrome style uses sharp corners only (rounded-sm or rounded-none)",
      "shadow-xl": "Monochrome style uses minimal shadows only (shadow-sm max)",
      "bg-gradient-to-r": "Monochrome style forbids gradients entirely"
    }
  },
  "required": {
    "button": [
      "rounded-sm",
      "transition-colors",
      "font-medium"
    ],
    "card": [
      "rounded-sm",
      "border"
    ],
    "input": [
      "border",
      "focus:outline-none",
      "bg-transparent"
    ]
  }
}