html, body {
  margin: 0;
  padding: 0;
  background-color: #ccc;
  font-size: 1.1em;
  line-height: 1.7em;
  font-family: 'Noto Sans TC', sans-serif;
}
main {
  max-width: 1260px;
  padding: 30px;
  background-color: #fff;
  margin: 30px auto;
}
main > img {
  margin: 0 auto;
  display: block;
  height: 200px;
  width: auto;
}
main > h1 {
  font-size: 3.66em;
}
#screenshots {
  display: flex;
}
#screenshots > a {
  text-decoration: none;
}
#screenshots > a > img {
  width: 100%;
}
a.btn {
  text-decoration: none;
  padding: 30px 45px;
  font-size: 1.3em;
  background-color: #ccc;
  color: #000;
  display: inline-block;
}
a.btn:hover {
  background-color: #000;
  color: #fff;
}