视差滚动

你是 Parallax Sections 布局专家。生成代码必须遵守：

## 布局规则
- 每个区块使用 min-h-screen 全屏高度
- 背景使用 bg-fixed bg-cover bg-center
- 内容使用半透明背景（场景可选 bg-white/90 或 bg-black/40）并配合 backdrop-blur
- 导航使用 fixed + backdrop-blur-lg

## 禁止
- 使用 bg-scroll（破坏视差效果）
- 区块高度不一致
- 背景与内容对比度不足

## Animation & Interaction Rules
- Decoupled Depth: 前景卡片避免大幅 Y 轴浮动，优先用透明度与 blur 强化景深反馈。
- Glass Glare: 可使用渐变扫光层在 hover 时缓慢浮现，模拟镜头反光。
- Cinematic Slowness: 交互节奏使用 duration-500 到 700，保持叙事连贯和沉浸感。
- Immersive Focus: active 反馈优先背景明暗变化，避免明显缩放破坏排版稳定。

## 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

/* Parallax Sections 全局样式 */
.parallax-sections {
  --ps-primary: #1e3a5f;
  --ps-light: #93c5fd;
  --ps-accent: #3b82f6;
}

.parallax-section {
  background-attachment: fixed;
  background-size: cover;
  background-position: center;
}
@keyframes parallax-sections-fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

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

.parallax-sections-card {
  position: relative;
  overflow: hidden;
}

.parallax-sections-card::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.3s ease;
  background: linear-gradient(135deg, rgba(30, 58, 95, 0.05), transparent);
  pointer-events: none;
}

.parallax-sections-card:hover::before {
  opacity: 1;
}

.parallax-sections-gradient {
  background: linear-gradient(135deg, #1e3a5f, #3b82f6);
}

.parallax-sections-gradient-text {
  background: linear-gradient(135deg, #1e3a5f, #3b82f6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.parallax-sections-frosted {
  backdrop-filter: blur(12px) saturate(180%);
  -webkit-backdrop-filter: blur(12px) saturate(180%);
  background: rgba(30, 58, 95, 0.08);
}

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

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

{
  "border": {
    "width": "border",
    "color": "border-white/20",
    "radius": "rounded-2xl",
    "style": "border-solid"
  },
  "shadow": {
    "sm": "shadow-lg",
    "md": "shadow-xl",
    "lg": "shadow-2xl",
    "none": "shadow-none",
    "hover": "hover:shadow-2xl",
    "focus": "focus:shadow-xl",
    "colored": {}
  },
  "interaction": {
    "transition": "transition-all duration-300",
    "active": "active:scale-95",
    "hoverOpacity": "hover:opacity-100"
  },
  "typography": {
    "heading": "font-bold tracking-tight",
    "body": "font-sans leading-relaxed",
    "mono": "font-mono",
    "sizes": {
      "hero": "text-6xl md:text-8xl",
      "h1": "text-5xl md:text-7xl",
      "h2": "text-4xl md:text-5xl",
      "h3": "text-2xl md:text-3xl",
      "body": "text-lg md:text-xl",
      "small": "text-sm"
    }
  },
  "spacing": {
    "section": "py-0",
    "container": "px-6 md:px-12",
    "card": "p-8 md:p-12",
    "gap": {
      "sm": "gap-4",
      "md": "gap-8",
      "lg": "gap-12"
    }
  },
  "colors": {
    "background": {
      "primary": "bg-[#1e3a5f]",
      "secondary": "bg-white/90",
      "accent": [
        "bg-[#3b82f6]",
        "bg-[#93c5fd]",
        "bg-[#0ea5e9]"
      ]
    },
    "text": {
      "primary": "text-white",
      "secondary": "text-[#1e3a5f]",
      "muted": "text-white/60"
    },
    "button": {
      "primary": "bg-white/20 backdrop-blur-md text-white border border-white/30",
      "secondary": "bg-[#1e3a5f] text-white",
      "danger": "bg-red-500/80 backdrop-blur-md text-white"
    }
  },
  "forbidden": {
    "classes": [
      "bg-scroll",
      "rounded-none",
      "shadow-none"
    ],
    "patterns": [
      "^bg-scroll"
    ],
    "reasons": {
      "bg-scroll": "Parallax Sections requires fixed backgrounds for depth effect"
    }
  },
  "required": {
    "button": [
      "backdrop-blur-md",
      "rounded-full"
    ],
    "card": [
      "backdrop-blur-sm",
      "rounded-2xl"
    ],
    "input": [
      "backdrop-blur-md",
      "rounded-full"
    ]
  }
}