淡入下滑

{
  "slug": "fade-in-down",
  "name": "淡入下滑",
  "nameEn": "Fade In Down",
  "description": "元素从上方淡入并向下滑动，常用于导航栏、下拉菜单入场。",
  "descriptionEn": "Element fades in while sliding downward. Commonly used for navbars and dropdown menus.",
  "category": "entrance",
  "tags": [
    "fade",
    "slide",
    "entrance",
    "dropdown"
  ],
  "trigger": "on-mount",
  "difficulty": "beginner",
  "duration": "600ms",
  "easing": "cubic-bezier(0.16, 1, 0.3, 1)",
  "cssProperties": [
    "opacity",
    "transform"
  ],
  "isGPUAccelerated": true,
  "previewBg": "light",
  "keywords": [
    "fade in",
    "slide down",
    "entrance",
    "dropdown",
    "navbar"
  ],
  "useCases": [
    "Dropdown menu appearance",
    "Notification banner slide-in",
    "Top navigation reveal",
    "Toast notification from top"
  ],
  "relatedAnimations": [
    "fade-in-up",
    "scale-in"
  ],
  "recommendedStyles": [
    "glassmorphism",
    "corporate-clean",
    "notion-style"
  ],
  "codeSnippets": [
    {
      "label": "CSS Keyframes",
      "language": "css",
      "code": "@keyframes fade-in-down {\n  from {\n    opacity: 0;\n    transform: translateY(-20px);\n  }\n  to {\n    opacity: 1;\n    transform: translateY(0);\n  }\n}\n\n.fade-in-down {\n  --sk-duration: 600ms;\n  --sk-delay: 0ms;\n  --sk-ease: cubic-bezier(0.16, 1, 0.3, 1);\n  will-change: transform, opacity;\n  animation: fade-in-down var(--sk-duration) var(--sk-ease) var(--sk-delay) both;\n}\n\n@media (prefers-reduced-motion: reduce) {\n  .fade-in-down {\n    animation: none;\n    opacity: 1;\n    transform: none;\n  }\n}"
    },
    {
      "label": "Tailwind CSS",
      "language": "css",
      "code": "@keyframes fade-in-down {\n  from {\n    opacity: 0;\n    transform: translateY(-20px);\n  }\n  to {\n    opacity: 1;\n    transform: translateY(0);\n  }\n}\n\n@utility animate-fade-in-down {\n  --sk-duration: 600ms;\n  --sk-delay: 0ms;\n  --sk-ease: cubic-bezier(0.16, 1, 0.3, 1);\n  will-change: transform, opacity;\n  animation: fade-in-down var(--sk-duration) var(--sk-ease) var(--sk-delay) both;\n}\n\n@media (prefers-reduced-motion: reduce) {\n  .fade-in-down {\n    animation: none;\n    opacity: 1;\n    transform: none;\n  }\n}"
    },
    {
      "label": "Framer Motion",
      "language": "tsx",
      "code": "import { motion } from \"framer-motion\";\n\n// Tip: respect user's motion preferences\n// import { useReducedMotion } from \"framer-motion\";\n// const reduced = useReducedMotion();\n// Use reduced ? { opacity: 0 } : { opacity: 0, y: -20 } for initial\n\n<motion.div\n  initial={{ opacity: 0, y: -20 }}\n  animate={{ opacity: 1, y: 0 }}\n  transition={{ duration: 0.6, ease: [0.16, 1, 0.3, 1] }}\n>\n  Content\n</motion.div>"
    }
  ]
}