利用CSS3，设计实现多张图片的轮播。

好的，以下是一个利用CSS3实现的多张图片轮播的示例代码：

HTML代码：

<div class="slider">
  <div class="slider-inner">
    <img src="image1.jpg" alt="Image 1">
    <img src="image2.jpg" alt="Image 2">
    <img src="image3.jpg" alt="Image 3">
  </div>
  <div class="slider-nav">
    <span class="slider-nav-item"></span>
    <span class="slider-nav-item"></span>
    <span class="slider-nav-item"></span>
  </div>
</div>

CSS代码：

.slider {
  position: relative;
  width: 100%;
  height: 400px;
  overflow: hidden;
}
.slider-inner {
  position: absolute;
  top: 0;
  left: 0;
  width: 300%;
  height: 100%;
  display: flex;
  transition: transform 0.5s ease-in-out;
}
.slider-inner img {
  width: 33.333%;
  height: 100%;
  object-fit: cover;
}
.slider-nav {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
}
.slider-nav-item {
  width: 10px;
  height: 10px;
  margin-right: 10px;
  border-radius: 50%;
  background-color: #ccc;
  cursor: pointer;
}
.slider-nav-item.active {
  background-color: #333;
}

JavaScript代码：

const slider = document.querySelector('.slider');
const sliderInner = document.querySelector('.slider-inner');
const sliderNav = document.querySelector('.slider-nav');
const sliderNavItems = document.querySelectorAll('.slider-nav-item');
let currentSlide = 0;

function slideTo(slide) {
  sliderInner.style.transform = `translateX(-${slide * 100}%)`;
  sliderNavItems[currentSlide].classList.remove('active');
  sliderNavItems[slide].classList.add('active');
  currentSlide = slide;
}

sliderNav.addEventListener('click', e => {
  const navItem = e.target.closest('.slider-nav-item');
  if (!navItem) return;
  const index = [...sliderNavItems].indexOf(navItem);
  slideTo(index);
});

setInterval(() => {
  const nextSlide = (currentSlide + 1) % sliderNavItems.length;
  slideTo(nextSlide);
}, 5000);

这个轮播使用了CSS3的`transform`属性来实现滑动效果，使用了JavaScript来处理轮播的交互和自动轮播。另外，还添加了导航点来方便用户切换轮播图片。