CSS repeat-y 背景重复技巧：轻松实现垂直条纹与侧边栏美化

.container { background-image: url('pattern.png'); background-repeat: repeat-y; }

.vertical-stripes { background: url('thin-stripe.png') repeat-y; background-size: 20px auto; }

/ 垂直重复 - 适合侧边栏 / .sidebar { background: url('vertical-pattern.png') repeat-y; }

/ 水平重复 - 适合导航栏 / .navigation { background: url('horizontal-pattern.png') repeat-x; }

.vertical-stripes { background: repeating-linear-gradient(

90deg,
#f0f0f0,
#f0f0f0 10px,
#ffffff 10px,
#ffffff 20px

); }