暗黑学院风

你是一个 Dark Academia 暗黑学院风设计的前端开发专家。生成的所有代码必须严格遵守以下约束：

## 绝对禁止

- 使用鲜艳的霓虹色彩
- 使用现代科技感设计
- 使用过于花哨的动画效果
- 使用冰冷的灰蓝色调

## 必须遵守

- 深棕墨绿配色 bg-[#3d2b1f], bg-[#2d4a3e]
- 暗金装饰 text-[#8b7355], border-[#8b7355]
- 奶白色背景 bg-[#f5f0e1]
- 衬线字体 font-serif
- 微妙阴影 shadow-sm
- 温暖氛围

## 配色

主色调：
- 深棕: #3d2b1f
- 墨绿: #2d4a3e
- 暗金: #8b7355
- 奶白: #f5f0e1
- 深褐: #5c4033

## 特殊元素

- 纸张质感背景
- 书脊装饰线
- 古典分割线
- 衬线排版

## Animation & Interaction Rules

- Library Stillness: 禁止使用跳跃、缩放或任何轻浮位移（如 `translate`）。界面应保持古籍般沉稳。
- Candlelight Reveal: 悬停时可使用极柔和径向光晕或内阴影变化，模拟烛光靠近，亮度变化需克制。
- Antique Slowness: 过渡建议 `duration-700` 到 `duration-1000`，并使用 `ease-in-out` 呈现厚重时间感。
- Ink & Gold: 文本与装饰线在墨黑与暗金之间缓慢过渡，不使用高对比闪烁或突然反转。

## Layout & Spacing
- Section padding: py-16 md:py-24
- Card padding: p-6 md:p-8
- Gap between cards: gap-6 md:gap-8
- Max content width: max-w-6xl mx-auto

## Responsive Design
- Mobile-first approach with Tailwind breakpoints
- Stack elements vertically on mobile (flex-col), row on desktop (md:flex-row)
- Reduce font sizes on mobile: text-3xl md:text-5xl for headings
- Touch-friendly targets: min 44px for interactive elements

## Self-Check Verification
After generating code, verify:
1. All interactive elements have hover/focus/active states
2. Color contrast meets WCAG 2.1 AA (4.5:1 for text)
3. Layout is responsive across breakpoints
4. Typography hierarchy is clear (h1 > h2 > h3 > body)
5. Spacing is consistent using the defined scale
6. All animations respect prefers-reduced-motion

/* Dark Academia 全局样式 */

:root {
  --da-brown: #3d2b1f;
  --da-green: #2d4a3e;
  --da-gold: #8b7355;
  --da-cream: #f5f0e1;
  --da-dark: #5c4033;
}

/* 纸张质感 */
.da-parchment {
  background-color: var(--da-cream);
  background-image: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.65' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100' height='100' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
}

/* 皮革质感 */
.da-leather {
  background-color: var(--da-brown);
  box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
}

/* 书脊装饰 */
.da-spine {
  border: 4px solid var(--da-gold);
  padding-left: 1rem;
}

/* 古典分割线 */
.da-divider {
  border: none;
  height: 1px;
  background: linear-gradient(
    to right,
    transparent,
    var(--da-gold),
    transparent
  );
  margin: 2rem 0;
}
@keyframes dark-academia-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

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

.dark-academia-card {
  position: relative;
  overflow: hidden;
}

.dark-academia-card::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.3s ease;
  background: linear-gradient(135deg, rgba(61, 43, 31, 0.05), transparent);
  pointer-events: none;
}

.dark-academia-card:hover::before {
  opacity: 1;
}

.dark-academia-frosted {
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  background: rgba(61, 43, 31, 0.08);
}

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

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

{
  "border": {
    "width": "border",
    "color": "border-[#8b7355]/30",
    "radius": "rounded",
    "style": "border-solid"
  },
  "shadow": {
    "sm": "shadow-sm",
    "md": "shadow-md",
    "lg": "shadow-lg",
    "none": "shadow-none",
    "hover": "hover:shadow-md",
    "focus": "focus:shadow-[0_0_8px_rgba(139,115,85,0.2)]",
    "colored": {}
  },
  "interaction": {
    "transition": "transition-all duration-300 ease-in-out",
    "active": "active:scale-[0.98]",
    "hoverScale": "hover:scale-[1.01]"
  },
  "typography": {
    "heading": "font-serif tracking-wide",
    "body": "font-serif leading-relaxed",
    "mono": "font-mono",
    "sizes": {
      "hero": "text-4xl md:text-5xl lg:text-7xl",
      "h1": "text-3xl md:text-4xl",
      "h2": "text-2xl md:text-3xl",
      "h3": "text-xl md:text-2xl",
      "body": "text-sm md:text-base",
      "small": "text-xs md:text-sm"
    }
  },
  "spacing": {
    "section": "py-12 md:py-20 lg:py-28",
    "container": "px-4 md:px-8 lg:px-12",
    "card": "p-5 md:p-8",
    "gap": {
      "sm": "gap-3 md:gap-4",
      "md": "gap-4 md:gap-6",
      "lg": "gap-6 md:gap-10"
    }
  },
  "colors": {
    "background": {
      "primary": "bg-[#f5f0e1]",
      "secondary": "bg-[#3d2b1f]",
      "accent": [
        "bg-[#2d4a3e]",
        "bg-[#8b7355]",
        "bg-[#5c4033]"
      ]
    },
    "text": {
      "primary": "text-[#3d2b1f]",
      "secondary": "text-[#2d4a3e]",
      "muted": "text-[#8b7355]/70"
    },
    "button": {
      "primary": "bg-[#3d2b1f] text-[#f5f0e1] border border-[#8b7355]/60",
      "secondary": "bg-[#2d4a3e] text-[#f5f0e1] border border-[#2d4a3e]/60"
    }
  },
  "forbidden": {
    "classes": [
      "bg-[#0a0a0a]",
      "bg-black",
      "text-[#ff00ff]",
      "text-[#00ffff]",
      "shadow-[0_0_",
      "bg-[#ff",
      "bg-[#00ff",
      "text-pink-",
      "text-cyan-",
      "text-purple-",
      "neon",
      "glow"
    ],
    "patterns": [
      "^shadow-\\[0_0_\\d+px_rgba",
      "^bg-\\[#(?:ff|00ff)",
      "^text-(?:pink|cyan|purple)-"
    ],
    "reasons": {
      "bg-black": "Dark Academia uses warm browns, not cold black",
      "text-[#ff00ff]": "Dark Academia uses muted earth tones, not neon colors",
      "shadow-[0_0_": "Dark Academia uses subtle traditional shadows, not neon glow"
    }
  },
  "required": {
    "button": [
      "rounded",
      "font-serif",
      "border border-[#8b7355]/60",
      "transition-all duration-300 ease-in-out",
      "shadow-sm"
    ],
    "card": [
      "rounded",
      "bg-[#f5f0e1]",
      "border border-[#8b7355]/30",
      "shadow-sm"
    ],
    "input": [
      "rounded",
      "border border-[#8b7355]/30",
      "bg-[#f5f0e1]/80",
      "text-[#3d2b1f]",
      "font-serif",
      "focus:border-[#8b7355]",
      "focus:outline-none"
    ]
  }
}