<main>
  <h1>W3cplus!</h1>
  <p>您阅读过 <a href="https://www.w3cplus.com/">我的博客</a>？我将在这里和大家探讨CSS。</p>
</main>

@import url("https://fonts.googleapis.com/css2?family=Exo:wght@600&display=swap");

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  width: 100vw;
  min-height: 100vh;
  font-family: "Exo", Arial, sans-serif;
  background-color: #222;
  color: #f36;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.5rem;
  gap: 10px;
  padding: 10px;
}

main {
  padding: 20px;
}

h1 {
  margin: 0;
  line-height: inherit;
  font-size: 3.5rem;
  color: #e5ddcb;
}

h1::after {
  font-size: 1.2rem;
  color: #a6e5c6;
}

p {
  margin: 20px 0 0;
}

a {
  color: #ff8c94;
}

a::after {
  font-size: 12px;
  color: #09f;
}

:root {
  --open: "(";
  --close: ")";
  --heading-hint: " " var(--open) "记述前端那些事,引领Web前沿,打造精品教程"
    var(--close);
  --link-hint: " " var(--open) attr(href) var(--close);
}

h1::after {
  content: var(--heading-hint);
}

a::after {
  content: var(--link-hint);
}