* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  background-color: #ffffff;
  font-family: 'Segoe UI', 'Roboto', system-ui, -apple-system, 'Helvetica Neue', sans-serif;
  line-height: 1.2;
}
.full-image {
  position: relative;
  width: 100%;
  background-color: #f0f0f0;  
}
.full-image img {
  display: block;          
  width: 100%;
  height: 100%;
  object-fit: cover;        
  user-select: none;        
}
.banner {
  aspect-ratio: 16 / 5;    
}
.app-intro {
  aspect-ratio: 16 / 7;     
}
.footer-image {
  aspect-ratio: 16 / 4;    
}
::-webkit-scrollbar {
  width: 8px;
  background: #eee;
}
::-webkit-scrollbar-thumb {
  background: #aaa;
  border-radius: 4px;
}