.box { padding: 40px 15px; background-color: #ffebcd;} .box3 { padding: 0.5em 1em; margin: 2em 0; color: #2c2c2f; background: #d8e0f1;/*背景色*/ } .box3 p { margin: 0; padding: 0; } body { padding-top:40px; background-color: #ffebcd; background-size: cover; background-attachment: fixed; background-position: center center; background-image: url("元画像.jpg");}