/* 欢迎页容器 */
.welcome-container {
  width: 100%;
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(180deg, #1a1d3a 0%, #2d1b4e 50%, #3d2456 100%);
  position: relative;
  overflow: hidden;
  padding-bottom: 100rpx;
}

/* 星星装饰 */
.stars {
  position: absolute;
  width: 100%;
  height: 100%;
  top: 0;
  left: 0;
  pointer-events: none;
}

.star {
  position: absolute;
  width: 4rpx;
  height: 4rpx;
  background: #ffffff;
  border-radius: 50%;
  opacity: 0.8;
  animation: twinkle 3s ease-in-out infinite;
}

.star-1 {
  top: 15%;
  left: 20%;
  animation-delay: 0s;
}

.star-2 {
  top: 25%;
  right: 25%;
  width: 6rpx;
  height: 6rpx;
  animation-delay: 0.5s;
}

.star-3 {
  top: 45%;
  left: 15%;
  animation-delay: 1s;
}

.star-4 {
  top: 60%;
  right: 20%;
  width: 5rpx;
  height: 5rpx;
  animation-delay: 1.5s;
}

.star-5 {
  top: 75%;
  left: 30%;
  animation-delay: 2s;
}

.star-6 {
  top: 85%;
  right: 35%;
  width: 6rpx;
  height: 6rpx;
  animation-delay: 2.5s;
}

@keyframes twinkle {
  0%, 100% {
    opacity: 0.3;
    transform: scale(1);
  }
  50% {
    opacity: 1;
    transform: scale(1.2);
  }
}

/* 主内容区域 */
.main-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 1;
  position: absolute;
  top: 35%;
  left: 50%;
  transform: translate(-50%, -50%);
  animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translate(-50%, -50%) translateY(30rpx);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%) translateY(0);
  }
}

/* 书本图标 - 单一整体样式 */
.book-icon-single {
  width: 140rpx;
  height: 110rpx;
  position: relative;
  margin-bottom: 60rpx;
  display: flex;
  justify-content: center;
  align-items: center;
}

.book-page-left,
.book-page-right {
  width: 60rpx;
  height: 90rpx;
  background: #ffffff;
  position: absolute;
  border-radius: 6rpx;
}

.book-page-left {
  left: 8rpx;
  transform: perspective(300rpx) rotateY(20deg);
  box-shadow: 2rpx 2rpx 12rpx rgba(0, 0, 0, 0.25);
  z-index: 2;
}

.book-page-right {
  right: 8rpx;
  transform: perspective(300rpx) rotateY(-20deg);
  box-shadow: -2rpx 2rpx 12rpx rgba(0, 0, 0, 0.25);
  z-index: 2;
}

.book-spine {
  width: 10rpx;
  height: 90rpx;
  background: #e5e5e5;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 2rpx;
  z-index: 1;
  box-shadow: 0 2rpx 8rpx rgba(0, 0, 0, 0.2);
}

/* 应用标题 */
.app-title {
  font-size: 88rpx;
  font-weight: bold;
  color: #ffffff;
  margin-bottom: 24rpx;
  letter-spacing: 8rpx;
  text-shadow: 0 4rpx 20rpx rgba(0, 0, 0, 0.3);
}

/* 应用副标题 */
.app-subtitle {
  font-size: 30rpx;
  color: rgba(255, 255, 255, 0.65);
  letter-spacing: 2rpx;
}

/* 进入按钮 - 左下角定位 */
.enter-button {
  width: 240rpx;
  height: 88rpx;
  background: linear-gradient(135deg, #a855f7 0%, #9333ea 100%);
  border-radius: 44rpx;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8rpx 24rpx rgba(168, 85, 247, 0.4);
  transition: all 0.3s ease;
  position: fixed;
  bottom: 120rpx;
  left: 32rpx;
  z-index: 10;
  overflow: hidden;
}

.enter-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #c084fc 0%, #a855f7 100%);
  opacity: 0;
  transition: opacity 0.3s ease;
  z-index: -1;
}

.enter-button:active {
  transform: scale(0.96);
}

.enter-button:active::before {
  opacity: 1;
}

.button-icon {
  font-size: 32rpx;
  margin-right: 12rpx;
}

.button-text {
  font-size: 30rpx;
  color: #ffffff;
  font-weight: 500;
  letter-spacing: 2rpx;
}