/* Reset */
* { margin: 0; padding: 0; box-sizing: border-box; }

body { text-align: center; font-family: Arial, sans-serif; }

.main-container {
  position: relative;
  max-width: 720px;
  margin: 0 auto;
}
.bg-img { width: 100%; }

.header {
  position: absolute;
  width: 100%;
  text-align: center;
  top: 13%;
}
.middle-content {
    position: absolute;
    width: 90%;
    text-align: center;
    top: 32%;
    left: 5%;
}
.wenan1 {
  position: absolute;
  width: 100%;
  text-align: center;
  top: 28%;
}
.anniu-section1 {
  position: absolute;
  width: 100%;
  text-align: center;
  top: 47%;
}
.wenan2 {
  position: absolute;
  width: 100%;
  text-align: center;
  top: 53%;
}
.wenan3 {
  position: absolute;
  width: 100%;
  text-align: center;
  top: 73%;
}

.pulse-btn {
  width: 90%;
  cursor: pointer;
  animation: pulseAnim 1s linear infinite;
}
@keyframes pulseAnim {
  0% { transform: scale(0.9); }
  50% { transform: scale(1); }
  100% { transform: scale(0.9); }
}