[data-webp="0"] #header {
  background-image: url("../../assets/img/bg/bg_1_1920_x_1080.png");
}

[data-webp="1"] #header {
  background-image: url("../../assets/img/bg/bg_1_1920_x_1080.webp");
}

[data-webp="0"] #update {
  background-image: url("../../assets/img/bg/bg_2_1920_x_1080.jpg");
}

[data-webp="1"] #update {
  background-image: url("../../assets/img/bg/bg_2_1920_x_1080.webp");
}

[data-webp="0"] #textbook {
  background-image: url("../../assets/img/bg/bg_3_1920_x_1080.jpg");
}

[data-webp="1"] #textbook {
  background-image: url("../../assets/img/bg/bg_3_1920_x_1080.webp");
}

[data-webp="0"] #practice {
  background-image: url("../../assets/img/bg/bg_4_1920_x_1080.png");
}

[data-webp="1"] #practice {
  background-image: url("../../assets/img/bg/bg_4_1920_x_1080.webp");
}

[data-webp="0"] #teach {
  background-image: url("../../assets/img/bg/bg_5_1920_x_1080.png");
}

[data-webp="1"] #teach {
  background-image: url("../../assets/img/bg/bg_5_1920_x_1080.webp");
}

[data-webp="0"] #others {
  background-image: url("../../assets/img/bg/bg_6_1920_x_1920.png");
}

[data-webp="1"] #others {
  background-image: url("../../assets/img/bg/bg_6_1920_x_1920.webp");
}