body, html {
  margin: 0;
  padding: 0;
  height: 100%;
  
}

.container {
  display: flex;
  height: 100vh;
}

.left-space {
  width: 50%;
}

.right-wrapper {
  width: 50%;
  overflow: hidden;
  position: relative;
}

.right-content {
  width: 100%;
  height: 100%;
  position: absolute; /* 关键！脱离文档流 */
  top: 0;
  left: 0;
  transform: translateX(100%);
  animation: slideIn 0.5s cubic-bezier(0.25, 0.1, 0.25, 1) forwards; /* 快速开始，后面慢下来 */
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
  }
  to {
    transform: translateX(0);
  }
}