/* body {
    background-color: #F8F6F0;
} */

.header,
.upper,
.lower {
  width: 1012px;
  margin: 0 auto;
}

.header a,
.upper a,
.lower a {
  display: block;
  width: 100%;
  height: 100%;
  /* 防止空隙 */
  margin-bottom: -3px;
}

.header img,
.upper img,
.lower img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.header {
  position: fixed;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
}

@media (max-width: 1012px) {
  .header,
  .upper,
  .lower {
    width: 100%;
  }
}

#loading-screen {
  position: fixed; 
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 1); 
  display: flex;
  flex-direction: column; 
  justify-content: center; 
  align-items: center; 
  z-index: 9999; 
  color: #d1cfcf; 
  font-size: 1.2em;
}

.loader {
  border: 8px solid #d1cfcf; 
  border-top: 8px solid #8000FF; 
  border-radius: 50%; 
  width: 60px;
  height: 60px;
  animation: spin 1s linear infinite; 
  margin-bottom: 20px; 
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}