ui-enhance-animate（ui 增强动画）

UI Enhancement + Staggered Animation Skill

This skill performs a full design upgrade of an existing website or component. It is NOT just about adding animations — it is a holistic visual refinement pass that touches typography, spacing, layout, depth, micro-interactions, and motion. The existing color palette is preserved; everything else can and should be improved.

Phase 1 — Audit & Understand Before Touching Anything

Before writing a single line of code, do a thorough read of the existing code. Extract and note:

1. Color palette — all hex/hsl/rgb values, CSS variables, Tailwind color classes. These are sacred and must be preserved exactly.
2. Font stack — what fonts are currently in use.
3. Layout structure — is it CSS Grid, Flexbox, plain blocks? What's the overall page structure?
4. Component inventory — list every distinct section/component: hero, navbar, cards, features, testimonials, CTA, footer, etc.
5. Current weaknesses — visually identify what looks amateur or generic: flat cards, no spacing rhythm, weak typography hierarchy, no depth/shadow, boring hover states, no visual flow, walls of text, etc.
6. Tech stack — React (use Framer Motion), plain HTML/CSS (use CSS animations + IntersectionObserver), Vue, etc.

Only after this audit should you begin making changes.

Phase 2 — Full Design Upgrade (Non-Animation)

Apply ALL of the following improvements that are relevant to the site. Be thorough — don't skip sections because they "look okay". Every part of the site should be elevated.

Typography

• Introduce a clear typographic hierarchy: display sizes (clamp-based fluid sizing), section headings, subheadings, body, caption — each with distinct weight and size.
• Replace generic system fonts (Arial, Helvetica, system-ui) with a distinctive pairing from Google Fonts or similar. A strong display/heading font paired with a clean readable body font.
• Use letter-spacing for uppercase labels and overlines.
• Add line-height rhythm: ~1.2 for headings, ~1.6–1.7 for body text.
• Tighten long text blocks with max-width: 65ch for readability.

Spacing & Rhythm

• Introduce a consistent spacing scale (e.g., 4/8/16/24/32/48/64/96px).
• Increase section padding — most amateur sites are too cramped.
• Add generous whitespace between section components.
• Ensure consistent internal card/component padding.

Depth & Surfaces

• Add layered box-shadow to cards, modals, and elevated surfaces. Use multi-layer soft shadows, not harsh single-layer ones.
• Use subtle border with low-opacity color instead of hard outlines.
• Apply backdrop-filter: blur() to glass-morphism elements like navbars or overlapping cards where appropriate.
• Use subtle background differentiation between sections (slightly lighter/darker tint of existing colors).

Layout & Composition

• Break out of purely uniform grid layouts. Use asymmetric or offset compositions where they add interest.
• Add visual anchors: decorative elements, large background text/numbers, gradient blobs, or geometric shapes using the existing color palette (low opacity).
• Ensure the hero is impactful with generous sizing and a strong focal point.
• Use CSS Grid for complex layouts; avoid excessive nested divs.

Cards & Components

• Round all corners consistently (usually 8–16px for cards, 6–8px for buttons/inputs).
• Add hover states to all interactive elements: cards should lift (translateY + shadow), buttons should shift or glow.
• Ensure buttons have visible padding, strong contrast, and consider adding a subtle icon or arrow.
• Add transition: all 0.2s ease baseline to interactive elements.

Visual Polish Details

• Add subtle gradient overlays to hero images or dark sections.
• Use overflow: hidden on cards to clip child images and effects cleanly.
• Ensure images use object-fit: cover and have defined aspect ratios.
• Add divider treatments between sections (subtle border, gradient fade, or decorative wave/angle).
• If there are icons, ensure they are consistently sized and optically aligned with text.

Phase 3 — Staggered Blur + Slide-Up Reveal Animations

Animation Philosophy

• Animations should feel natural and elegant — not flashy or distracting.
• Every major content section should animate in when it enters the viewport.
• Use a staggered pattern: child elements within a section animate in one by one with a delay offset (e.g., 0.1s apart).
• The animation: elements start opacity: 0, filter: blur(8px), translateY(24px) and transition to opacity: 1, filter: blur(0px), translateY(0).
• Duration: 0.6s for most elements. Easing: ease-out or a custom cubic-bezier like cubic-bezier(0.16, 1, 0.3, 1) (snappy spring).
• Respect prefers-reduced-motion — disable animations for users who opt out.

React — Framer Motion Implementation

Install if not present:

npm install framer-motion

Core Animation Variants

// lib/animations.ts
import { Variants } from "framer-motion";

export const fadeUpBlur: Variants = {
  hidden: {
    opacity: 0,
    y: 24,
    filter: "blur(8px)",
  },
  visible: {
    opacity: 1,
    y: 0,
    filter: "blur(0px)",
    transition: {
      duration: 0.6,
      ease: [0.16, 1, 0.3, 1],
    },
  },
};

export const staggerContainer: Variants = {
  hidden: {},
  visible: {
    transition: {
      staggerChildren: 0.1,
      delayChildren: 0.05,
    },
  },
};

// For heavier stagger (e.g., feature grids)
export const staggerContainerSlow: Variants = {
  hidden: {},
  visible: {
    transition: {
      staggerChildren: 0.15,
      delayChildren: 0.1,
    },
  },
};

Reusable AnimateInView Wrapper

// components/AnimateInView.tsx
import { motion, useInView } from "framer-motion";
import { useRef } from "react";
import { staggerContainer, fadeUpBlur } from "@/lib/animations";

interface AnimateInViewProps {
  children: React.ReactNode;
  className?: string;
  delay?: number;
  stagger?: boolean;
}

export function AnimateInView({
  children,
  className,
  delay = 0,
  stagger = false,
}: AnimateInViewProps) {
  const ref = useRef(null);
  const isInView = useInView(ref, { once: true, margin: "-80px" });

  if (stagger) {
    return (
      <motion.div
        ref={ref}
        className={className}
        variants={staggerContainer}
        initial="hidden"
        animate={isInView ? "visible" : "hidden"}
      >
        {children}
      </motion.div>
    );
  }

  return (
    <motion.div
      ref={ref}
      className={className}
      variants={fadeUpBlur}
      initial="hidden"
      animate={isInView ? "visible" : "hidden"}
      transition={{ delay }}
    >
      {children}
    </motion.div>
  );
}

// Individual animated child (use inside AnimateInView with stagger=true)
export function AnimatedItem({
  children,
  className,
}: {
  children: React.ReactNode;
  className?: string;
}) {
  return (
    <motion.div className={className} variants={fadeUpBlur}>
      {children}
    </motion.div>
  );
}

Usage Pattern

// Hero section — single block fade
<AnimateInView>
  <h1>Your Headline</h1>
  <p>Subheadline text here</p>
  <Button>CTA</Button>
</AnimateInView>

// Feature grid — staggered children
<AnimateInView stagger className="grid grid-cols-3 gap-6">
  {features.map((f) => (
    <AnimatedItem key={f.id}>
      <FeatureCard {...f} />
    </AnimatedItem>
  ))}
</AnimateInView>

// Section heading + body — slight delays
<div>
  <AnimateInView delay={0}>
    <h2>Section Title</h2>
  </AnimateInView>
  <AnimateInView delay={0.1}>
    <p>Section description</p>
  </AnimateInView>
</div>

Reduced Motion

// Wrap your app or layout:
import { LazyMotion, domAnimation, MotionConfig } from "framer-motion";

export function Providers({ children }: { children: React.ReactNode }) {
  return (
    <MotionConfig reducedMotion="user">
      <LazyMotion features={domAnimation}>
        {children}
      </LazyMotion>
    </MotionConfig>
  );
}

Plain HTML/CSS/JS — CSS + IntersectionObserver Implementation

CSS Animation Classes

/* Add to your global stylesheet */

@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(24px);
    filter: blur(8px);
    transition:
      opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
      transform 0.6s cubic-bezier(0.16, 1, 0.3, 1),
      filter 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  }

  .reveal.in-view {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0px);
  }

  /* Stagger delays for children */
  .stagger-children .reveal:nth-child(1) { transition-delay: 0.0s; }
  .stagger-children .reveal:nth-child(2) { transition-delay: 0.1s; }
  .stagger-children .reveal:nth-child(3) { transition-delay: 0.2s; }
  .stagger-children .reveal:nth-child(4) { transition-delay: 0.3s; }
  .stagger-children .reveal:nth-child(5) { transition-delay: 0.4s; }
  .stagger-children .reveal:nth-child(6) { transition-delay: 0.5s; }
  /* Add more as needed */
}

IntersectionObserver Script

// Add before closing </body>
const observer = new IntersectionObserver(
  (entries) => {
    entries.forEach((entry) => {
      if (entry.isIntersecting) {
        entry.target.classList.add("in-view");
        observer.unobserve(entry.target); // animate once
      }
    });
  },
  { rootMargin: "-80px 0px", threshold: 0.1 }
);

document.querySelectorAll(".reveal").forEach((el) => observer.observe(el));

Usage Pattern

<!-- Single block -->
<section>
  <div class="reveal">
    <h2>Section Title</h2>
    <p>Description text</p>
  </div>
</section>

<!-- Staggered grid -->
<div class="stagger-children grid">
  <div class="reveal card">Feature 1</div>
  <div class="reveal card">Feature 2</div>
  <div class="reveal card">Feature 3</div>
</div>

Phase 4 — Section-by-Section Application Guide

Apply improvements and animations to each section type as follows:

Phase 5 — Quality Checklist

Before delivering the result, verify:

• All original colors are preserved (no new palette colors introduced)
• Every section has at least one .reveal / AnimateInView wrapper
• Stagger is applied to all grid/list/card groups of 2+ items
• prefers-reduced-motion is respected
• Hover states exist on all interactive elements
• Typography has clear hierarchy (not all same size/weight)
• Cards/surfaces have depth (shadow, border, or background distinction)
• Spacing feels generous and rhythmic — not cramped
• No generic placeholder improvements — every change is intentional and visible
• The site feels noticeably more polished than before

Notes & Edge Cases

• If the site uses Tailwind: Use motion.div from Framer Motion with Tailwind classes. Add arbitrary values for blur: [filter:blur(8px)] or inline styles for the animation initial state.
• If colors are defined as Tailwind config values: Reference them in the animation components but don't change them.
• If there are images: Ensure they have defined height/aspect-ratio + object-fit: cover. Consider adding subtle scale-on-hover.
• For dark sites: Glassmorphism works especially well. Use bg-white/5 or similar low-opacity whites for card surfaces.
• For light sites: Use soft, layered shadows (shadow-sm + shadow-md combo). Use slight background tints to distinguish sections.
• Performance: blur() filter animations can be GPU-intensive on low-end devices. If performance is a concern, drop the blur and use only opacity + translateY.