.container {
  width:100%;
  max-width:1000px;
  margin:0 auto;
}

img {
  width:100%;
  height:auto;
}

section {
  position: relative;
}

#section1, #section1a {
  margin:0;
  background:#fff;
  height:100vh;
  overflow: hidden;
}

#section1_layer1, #section1a_layer1 {
  position: absolute;
  width: 100%;
  bottom: 60px;
  max-width: 1000px;
  z-index:1;
}

#section1_layer2, #section1a_layer2 {
  position: absolute;
  z-index: 2;
  bottom: 95px;
  width: auto;
  left: 45%;
  height: 440px;
}

#section1_layer3, #section1a_layer3 {
  position: absolute;
  z-index:3;
  bottom:20px;
  width: auto;
  /*width: 37vw;*/
  left: -3000px;
}

#section1_layer4, #section1a_layer4 {
  position: absolute;
  z-index:4;
  bottom:0;
  width: auto;
  right:-300px;
  height:130px;
}

#section2, #section2a {
  margin:100px;
  text-align:center;
  height:4000px;
  background:rgba(255,0,255,0.1);
}

#section1a_layer1, #section1a_layer2, #section1a_layer3, #section1a_layer4 {
  position:fixed;
}
#section2a {
  background:#fff;
}