/* 内页正面容器 - 右侧显示文字 */
.page-front {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    backface-visibility: hidden;
    z-index: 2;
    background-color: white;
    /* background-image: linear-gradient(to bottom, #3381ff, hsl(217, 100%, 71%), #64c1ff); */
    border-top-right-radius: 50px;
    border-bottom-right-radius: 50px;
    /* border: .5px solid black; */
    transform-style: preserve-3d;
    display: flex;
    justify-content: center;
    align-items: center;
    
}



/* 内页背面容器 - 左侧显示图片 */
.page-back {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    backface-visibility: hidden;
    z-index: 1;
    background-color: white;
    background-image: linear-gradient(to bottom, #3381ff, hsl(217, 100%, 71%), #64c1ff); 
    border-top-left-radius: 50px;
    border-bottom-left-radius: 50px;
    /* border: .5px solid black; */
    transform: rotateY(180deg);
    overflow: hidden; /* 确保图片不溢出边界 */
}



/* 页面内容包装器 */
.page-content-wrapper {
    display: flex;
    width: 100%;
    height: 100%;
    position: relative;
   
}

/* 左页样式 */
.page-left {
    width: 50%;
    height: 100%;
    position: relative;
    overflow: hidden;
    border-top-left-radius: 50px;
    border-bottom-left-radius: 50px;
   
}

/* 右页样式 */
.page-right {
    width: 50%;
    height: 100%;
    position: relative;
    overflow: hidden;
}

/* 图片样式 */
.page-image {
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    border-top-left-radius: 50px;
    border-bottom-left-radius: 50px;
    
    
}


/* 诗集标题容器样式 */
.poems-of-the-container {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: left;
    height: 100%;
    width: 100%;
    padding-left: 50px; /* 控制与左边缘的距离 */
    padding-top: 0px; /* 控制与上边缘的距离 */
}
/* 标题文本样式 */
/* .poems-of-the { */
    /* font-family: 'Playfair Display', serif; 优雅的衬线字体 */
    /* color: white; */
    /* margin: 5px 0; */
    /* letter-spacing: 2px; 字母间距 */
    /* text-transform: uppercase; 全大写 */
    /* font-size: 30px; 基本字体大小 */
    /* font-weight: 700; 添加这一行来使字体变粗 */
/* } */

/* 标题文本样式 */
.poems-of-the {
  font-family: 'Playfair Display', serif; 
  color: white;
  margin: 5px 0;
  letter-spacing: 2px; 
  text-transform: uppercase;
  font-size: 35px; 
  font-weight: 500; 
  position: relative;
  filter: url('#gooey'); /* apply SVG filter */
  display: flex;
  justify-content: flex-start;
  overflow: visible;
}

.poems-of-the span {
  display: inline-block;
  animation: GooeyEffect 8s infinite ease-in-out;
  transform-origin: center;
  will-change: filter, transform;
  animation-delay: calc(var(--i) * 0.15s);
  position: relative;
}

@keyframes GooeyEffect {
  0%, 100% {
      filter: blur(0px);
      transform: translateY(0) scale(1);
      opacity: 1;
  }
  25% {
      filter: blur(2px);
      transform: translateY(-1px) scale(1.05);
      opacity: 0.9;
  }
  40% {
      filter: blur(3px);
      transform: translateY(1px) scale(1.1);
      opacity: 0.85;
  }
  65% {
      filter: blur(2px);
      transform: translateY(-1px) scale(0.95);
      opacity: 0.9;
  }
  80% {
      filter: blur(1px);
      transform: translateY(0) scale(1);
      opacity: 0.95;
  }
}







/* 文本内容 */
.page-content {
  padding: 100px 100px 100px 100px; /* 上 右 下 左 */
    height: 100%;
    max-width: 800px;
    text-align: center;
    box-sizing: border-box;

}

.page-content h2 {
  font-family: 'Playfair Display', serif; /* 与封面标题保持一致 */
  margin-bottom: 10px;
  /* margin-top: 0px; 负值会使标题向上移动 */
  color: #333;
}

        
    
/* 封面正面样式 */
.cover-front {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    backface-visibility: hidden; /* 关键：隐藏背面 */
    z-index: 2;
    background-image: linear-gradient(to bottom, #3381ff, hsl(217, 100%, 71%), #64c1ff);
    border-top-right-radius: 50px;
    border-bottom-right-radius: 50px;
    /* border: .5px solid black; */
    transform-style: preserve-3d;
    
}
/* 封面背面样式 - 也需要显示图片 */
.cover-back {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    backface-visibility: hidden;
    z-index: 1;
    background-color: white;
    border-top-left-radius: 50px;
    border-bottom-left-radius: 50px;
    /* border: .5px solid black; */
    transform: rotateY(180deg);
    overflow: hidden; /* 确保图片不溢出边界 */
}



/* 封底正面样式 */
.back-cover-front {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    backface-visibility: hidden;
    z-index: 2;
    background-color: #2c5fb8;
    border-top-right-radius: 50px;
    border-bottom-right-radius: 50px;
    /* border: .5px solid black; */
}

/* 封底背面样式 */
.back-cover-back {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    backface-visibility: hidden;
    z-index: 1;
    background-image: linear-gradient(to bottom, #3381ff, hsl(217, 100%, 71%), #64c1ff);
    border-top-left-radius: 50px;
    border-bottom-left-radius: 50px;
    /* border: .5px solid black; */
    transform: rotateY(180deg);
}

/* 封底内容 */
.back-cover-content {
    position: absolute;
    bottom: 30px;
    width: 100%;
    text-align: center;
    color: rgba(255, 255, 255, 0.7);
}



        
:root{
    --w: 240px;
    --h: 240px;
}


body{
    margin: 0;
    padding: 0;
    display: flex;
    
    justify-content: center;
    align-items: center;
    height: 100vh;
    background-image: linear-gradient(to bottom, #3381ff, hsl(217, 100%, 74%), #3dd6f5);
    /* background-color: #172994; */
    transition: background-image 1.5s ease-in-out;

    background-size: cover;
    background-position: center;
    background-blend-mode: overlay;
}

   
/* 添加背景容器相关样式 */
#background-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

#bg-layer1, #bg-layer2 {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    transition: opacity 1.5s ease-in-out;
}

#bg-layer2 {
    opacity: 0; /* 初始时第二层是透明的 */
}





#book{
    height: var(--h);
    margin-top: -30px; /* 设置书本离顶部的距离 */
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: 1s;
    perspective: 1600px;
    transform-style: preserve-3d;
    transform-origin: center; /* 确保变换以中心为原点 */
    z-index: 10;
    
    
   
}

.book-cover{
    height: calc(var(--h) + 300px);
    width: calc(var(--w) + 300px);
    position: absolute;
    background-image: linear-gradient(to bottom, #3381ff, hsl(217, 100%, 71%), #64c1ff);
    border-top-right-radius: 50px;
    border-bottom-right-radius: 50px;
    transition: 1s;
    transform-origin: left;
    backface-visibility: visible;
    /* border: .5px solid black; */
    /*正面的位置*/
    left: -200px;
    top: -200px;
    transform-style: preserve-3d; /* 使子元素保持3D效果 */
      /* 添加书页阴影 */
    box-shadow: 0 3px 15px rgba(0, 15, 109, 0.05);
   
   
}


    

.book-page {
    height: var(--h);
    width: var(--w);
    position: absolute;
    z-index: 100;
    transition: 1s;
    transform-origin: -25px;
    background-size: cover;
    backface-visibility: visible;
}



#control {
  z-index: 15; /* 比云和书本都高 */
  pointer-events: auto;
    margin-top: 650px;
    user-select: none;
}


/* 基础按钮样式 */
#control button {
   display: inline-block;
   width: 80px;
   height: 80px;
   border: 0;
   margin: 0px 30px;
   color: white;
   font-size: 30px;
   font-weight: bold;
   border-radius: 50%;
   background-color: rgba(255,255,255, 0.3); /* 降低默认不透明度 */
   outline: none;
   cursor: pointer;
   transition: all 0.3s ease;
}

/* 启用状态的按钮 */
#control button.enabled-button {
    background-color: rgba(255, 255, 255, 0.4);
    color: white;
}

/* 悬停效果 - 增加优先级 */
#control button:hover:not(.disabled-button) {
   background-color: rgba(255, 255, 255, 0.7) !important; /* 提高对比度 */
   color: rgb(132, 200, 255);
   transform: scale(1.05);
}

/* 点击效果 */
#control button:active:not(.disabled-button) {
   transform: scale(0.95);
}

/* 禁用状态的按钮 */
#control button.disabled-button {
    background-color: rgba(255, 255, 255, 0.5);
    color: darkgray;
    cursor: default; /* 改变鼠标样式 */
}

/* 隐藏按钮 */
#control button.hidden-button {
    display: none;
}


/* 音频控制按钮样式 */
#sound-control {
  position: fixed;
  bottom: 20px;
  right: 30px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  border: none;
  cursor: pointer;
  z-index: 1000;
  transition: all 0.3s ease;
  display: flex;
  justify-content: center;
  align-items: center;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  padding: 8px; /* 为图标提供一些内边距 */
}

#sound-control:hover {
  background: rgba(255, 255, 255, 0.5);
  transform: scale(1.05);
}

#sound-control:active {
  transform: scale(0.95);
}

/* 声音图标样式 */
.sound-icon {
  width: 110%;
  height: 110%;
  object-fit: contain; /* 确保图像保持比例 */
}

/* 音量滑块容器 - 可选 */
#volume-control {
    position: fixed;
    bottom: 70px;
    right: 30px;
    width: 40px;
    height: 100px;
    background: rgba(255, 255, 255, 0.4);
    border-radius: 20px;
    display: flex; /* 默认隐藏 */
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 10px 0;
    z-index: 999;
}

/* 音量滑块样式 - 可选 */
#volume-slider {
    -webkit-appearance: none;
    width: 80px;
    height: 4px;
    background: rgba(255, 255, 255, 0.5);
    border-radius: 2px;
    transform: rotate(-90deg);
    margin: 0;
}

#volume-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: white;
    cursor: pointer;
    transition: width 0.3s ease, height 0.3s ease, background 0.3s ease, transform 0.3s ease;
}

#volume-slider::-moz-range-thumb {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: white;
    cursor: pointer;
    border: none;
    transition: width 0.3s ease, height 0.3s ease, background 0.3s ease, transform 0.3s ease;
}


/* WebKit 浏览器的滑块按钮悬停效果 - 增加放大效果 */
#volume-slider::-webkit-slider-thumb:hover {
  width: 16px;
  height: 16px;
  background: #78c9ff; /* 蓝色 */
  transform: scale(1.1); /* 额外的放大效果 */
  /* box-shadow: 0 0 5px rgba(100, 193, 255, 0.6); 添加发光效果 */
}

/* Firefox 浏览器的滑块按钮悬停效果 - 增加放大效果 */
#volume-slider::-moz-range-thumb:hover {
  width: 16px;
  height: 16px;
  background: #78c9ff; /* 蓝色 */
  transform: scale(1.1); /* 额外的放大效果 */
  /* box-shadow: 0 0 5px rgba(100, 193, 255, 0.6); 添加发光效果 */
}

/* WebKit 浏览器的滑块按钮激活效果 - 点击状态 */
#volume-slider::-webkit-slider-thumb:active {
  width: 18px;
  height: 18px;
  background: rgb(132, 200, 255); /* 更深的蓝色 */
  transform: scale(1.1); /* 更大的放大效果 */
  /* box-shadow: 0 0 8px rgba(51, 129, 255, 0.8); 更强的发光效果 */
}

/* Firefox 浏览器的滑块按钮激活效果 - 点击状态 */
#volume-slider::-moz-range-thumb:active {
  width: 18px;
  height: 18px;
  background: rgb(132, 200, 255); /* 更深的蓝色 */
  transform: scale(1.1); /* 更大的放大效果 */
  /* box-shadow: 0 0 8px rgba(51, 129, 255, 0.8); 更强的发光效果 */
}




/* 在 style.css 中添加/修改按钮样式 */
#restart-button {
    position: fixed;
    bottom: 55%;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 40px;
    border: 0;
    border-radius: 20px;
    background-color: rgba(255, 255, 255, 0.3);
    color: white;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    /* 添加过渡效果 */
    transition: all 0.5s ease;
    opacity: 0; /* 默认透明 */
    display: block; /* 使用透明度而不是 display:none 隐藏 */
    pointer-events: none; /* 透明时不响应点击事件 */
    z-index: 1001;
}

#restart-button:hover {
    background-color: rgba(255, 255, 255, 0.6);
    transform: translateX(-50%) scale(1.05);
}

#restart-button:active {
    transform: translateX(-50%) scale(0.95);
}

/* 按钮显示状态类 */
#restart-button.visible {
    opacity: 1;
    pointer-events: auto; /* 可以点击 */
}



/* Author attribution animation */
.poem-attribution {
  font-family: 'Playfair Display', serif;
    font-size: 0.8em;
    color: #666;
    font-style: italic;
    display: block;
    margin-top: 20px;
    opacity: 0;
    animation: fadeIn 1.5s ease-in forwards;
    animation-delay: 2s; /* Starts after most letters have settled */
  }
  
  /* Fade-in animation for author attribution */
  @keyframes fadeIn {
    0% {
      opacity: 0;
    }
    100% {
      opacity: 1;
    }
  }




  .rain-text, .sunny-text, .wind-text, .snow-text, .fog-text, .cloud-text {
    font-family: 'Merriweather', serif;
}




/* Rain letter animation container */
.rain-text {
    display: inline-block;
    position: relative;
    width: 100%;
    text-align: center;
  }
  
  /* Individual letter styling */
  .rain-letter {
    display: inline-block;
    opacity: 0;
    transform: translateY(-200px);
    animation: rainDrop 2s forwards;
  }
  
  /* Keep spaces visible */
  .rain-space {
    display: inline-block;
    width: 0.25em;
  }
  
  /* The rain drop animation */
  @keyframes rainDrop {
    0% {
      opacity: 0;
      transform: translateY(-200px);
    }
    60% {
      opacity: 0.7;
      transform: translateY(5px);
    }
    80% {
      transform: translateY(-2px);
    }
    100% {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  /* Space preservation for poetry */
  .rain-text br {
    display: block;
    content: "";
    margin-top: 0.1em;
  }






  
  /* Wind letter animation container */
.wind-text {
    display: inline-block;
    position: relative;
    width: 100%;
    text-align: center;
  }
  
  /* Individual letter styling for wind animation */
  .wind-letter {
    display: inline-block;
    opacity: 0;
    transform: translate(200px, -150px) rotate(45deg); /* Diagonal starting position from top-right */
    
    animation: windBlow 2s cubic-bezier(0.37, 0, 0.63, 1) forwards; /* More natural curve */
    /* animation: windBlow 2s forwards; */
  }
  
  /* Keep spaces visible */
  .wind-space {
    display: inline-block;
    width: 0.25em;
  }
  
  /* The wind blow animation with diagonal path */
  @keyframes windBlow {
    0% {
      opacity: 0;
      transform: translate(200px, -150px) rotate(45deg); /* Start from top-right */
    }
   
    /* 70% {
      opacity: 0.9;
      transform: translate(20px, -15px) rotate(-45deg); /* Approach final position */
    
  
    100% {
      opacity: 1;
      transform: translate(0, 0) rotate(0deg); /* Final resting position */
    }
  }
  
  /* Space preservation for poetry */
  .wind-text br {
    display: block;
    content: "";
    margin-top: 0.1em;
  }


/* Snow letter animation container */
.snow-text {
  display: inline-block;
  position: relative;
  width: 100%;
  text-align: center;
}

/* Individual letter styling for snow animation */
.snow-letter {
  display: inline-block;
  opacity: 0;
  transform-style: preserve-3d;
  transform: translateY(-200px) rotateX(0deg) rotateY(0deg) rotateZ(45deg);

  animation: snowFall 3s ease-in-out forwards;
  will-change: transform, opacity;
  /* backface-visibility: hidden;
  -webkit-font-smoothing: subpixel-antialiased; */
}

/* Keep spaces visible */
.snow-space {
  display: inline-block;
  width: 0.25em;
}

/* The improved snow fall animation - smoother with 3D rotation */
@keyframes snowFall {
  0% {
    opacity: 0;
    transform: translateY(-200px) rotateX(60deg) rotateY(45deg) rotateZ(120deg);
  }

  
  100% {
    opacity: 1;
    transform: translateY(0) rotateX(0deg) rotateY(0deg) rotateZ(0deg);
  }
}

/* Space preservation for poetry */
.snow-text br {
  display: block;
  content: "";
  margin-top: 0.1em;
}



/* Fog letter animation container */
.fog-text {
  display: inline-block;
  position: relative;
  width: 100%;
  text-align: center;
}

/* Individual letter styling for fog animation */
.fog-letter {
  display: inline-block;
  opacity: 0;
  filter: blur(12px);
  color: rgba(255, 255, 255, 0.1);
  animation: fogReveal 3.5s ease-in-out forwards;
  will-change: opacity, filter;
}

/* Keep spaces visible */
.fog-space {
  display: inline-block;
  width: 0.25em;
}

/* The fog reveal animation */
@keyframes fogReveal {
  0% {
    opacity: 0;
    filter: blur(12px);
    color: rgba(255, 255, 255, 0.1);
  }
  30% {
    opacity: 0.4;
    filter: blur(8px);
    color: rgba(50, 50, 50, 0.3);
  }
  60% {
    opacity: 0.7;
    filter: blur(5px);
    color: rgba(50, 50, 50, 0.6);
  }
  80% {
    opacity: 0.9;
    filter: blur(2px);
    color: rgba(50, 50, 50, 0.9);
  }
  100% {
    opacity: 1;
    filter: blur(0);
    color: inherit;
  }
}

/* Space preservation for poetry */
.fog-text br {
  display: block;
  content: "";
  margin-top: 0.1em;
}


/* Cloud letter animation container */
.cloud-text {
  display: inline-block;
  position: relative;
  width: 100%;
  text-align: center;
}

/* Individual letter styling for cloud animation */
.cloud-letter {
  display: inline-block;
  opacity: 0;
  filter: blur(8px);
  transform-origin: center;
  position: relative;
  animation: cloudReveal 4s ease-in-out forwards;
  will-change: transform, opacity, filter;
}

/* Keep spaces visible */
.cloud-space {
  display: inline-block;
  width: 0.25em;
}

/* The cloud reveal animation */
@keyframes cloudReveal {
  0% {
    opacity: 0.2;
    filter: blur(50px);
    transform: translate(var(--rand-x), var(--rand-y)) rotate(var(--rand-rotate)) scale(var(--rand-scale));
  }


  100% {
    opacity: 1;
    filter: blur(0);
    transform: translate(0, 0) rotate(0deg) scale(1);
  }
}

/* Space preservation for poetry */
.cloud-text br {
  display: block;
  content: "";
  margin-top: 0.1em;
}




/* 修改 CSS 变量 */
:root {
  --sunny-glow-color: #FFEC8B; /* 更柔和的黄色，避免橙色过渡 */
  --sunny-glow-color-light: white;
}

/* 在文本容器级别处理整体显示 */
.sunny-text {
  opacity: 0;
  filter: blur(10px);
  animation: showSunny 0.3s forwards;
  animation-delay: 0.05s;
}
@keyframes showSunny {
  to { opacity: 1;
    filter: blur(0px); }
}


/* 简化字母样式 */
.sunny-letter {
  display: inline-block;
  position: relative;
  color: white; /* 直接使用白色而不是透明 */
  animation: sunnyNeon 3s ease-out forwards; /* 添加 ease-out 缓动 */
  will-change: text-shadow, color;
}

@keyframes sunnyNeon {
  0% {
    color: white;
    text-shadow: 
 
      0 0 25px var(--sunny-glow-color-light),
      0 0 35px var(--sunny-glow-color),
      0 0 50px var(--sunny-glow-color);
  }

  50% {
    color: rgb(255, 255, 255);
    text-shadow: 
     
      0 0 25px var(--sunny-glow-color-light),
      0 0 40px var(--sunny-glow-color),
      0 0 100px var(--sunny-glow-color);
  }



  
  100% {
    color: #222;
    text-shadow: 
    0 0 0px white,
   
    0 0 0px var(--sunny-glow-color-light),
    0 0 0px var(--sunny-glow-color),
    0 0 200px var(--sunny-glow-color);
  }
}


/* Keep spaces visible */
.sunny-space {
  display: inline-block;
  width: 0.25em;
}

/* Space preservation for poetry */
.sunny-text br {
  display: block;
  content: "";
  margin-top: 0.1em;
}




/* Special button styles for snowy weather */
body.snowy-weather #control button {
  background-color: rgba(0, 0, 0, 0.4); /* Light blue-gray with higher opacity */
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3); /* Stronger shadow for contrast */
}

body.snowy-weather #control button:hover:not(.disabled-button) {
  background-color: rgba(0, 0, 0, 0.5) !important; /* Darker when hovering */
  color: rgb(63, 168, 255);
}

body.snowy-weather #sound-control {
  background-color:  rgba(0, 0, 0, 0.4); /* Match the navigation buttons */
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

body.snowy-weather #sound-control:hover {
  background-color: rgba(0, 0, 0, 0.5) /* Darker when hovering */
}

body.snowy-weather #volume-control {
  background-color:  rgba(0, 0, 0, 0.4);  /* Subtle background for volume control */
}

/* Style for the volume slider in snowy weather */
body.snowy-weather #volume-slider {
  background-color: rgba(255, 255, 255, 0.7);
}

/* slider圆圈 */
body.snowy-weather #volume-slider::-webkit-slider-thumb {
  background-color: rgba(255, 255, 255, 0.9); /* Darker thumb for contrast */
}

/* Add hover effect for WebKit browsers */
body.snowy-weather #volume-slider::-webkit-slider-thumb:hover {
  background-color: rgb(63, 168, 255); /* Blue color to match button hover */
  width: 16px;
  height: 16px;
  transform: scale(1.1);
}

/* Add active effect for WebKit browsers */
body.snowy-weather #volume-slider::-webkit-slider-thumb:active {
  background-color: rgb(100, 190, 255);
  width: 18px;
  height: 18px;
}

/* Add Firefox support as well */
body.snowy-weather #volume-slider::-moz-range-thumb {
  background-color: rgba(255, 255, 255, 0.9); /* Darker thumb for contrast */
}

body.snowy-weather #volume-slider::-moz-range-thumb:hover {
  background-color: rgb(63, 168, 255);
  width: 16px;
  height: 16px;
  transform: scale(1.1);
}

body.snowy-weather #volume-slider::-moz-range-thumb:active {
  background-color: rgb(100, 190, 255);
  width: 18px;
  height: 18px;
}




  /* 云效果的样式 */
  #cloud-viewport {
    position: fixed; /* 固定定位，覆盖整个视口 */
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: transparent;
    perspective: 1200px;
    z-index: 5; /* 确保在背景上但在书本下 */
    pointer-events: auto; /* 不拦截鼠标事件 */
}

#cloud-world {
    position: absolute;
    left: 50%;
    top: 50%;
    margin-left: -400px; 
    margin-top: -400px; 
    height: 800px;  
    width: 800px;  
    transform-style: preserve-3d;
}

.cloudBase {
    position: absolute;
    left: 400px;  
    top: 400px;    
    width: 20px;
    height: 20px;
    margin-left: -10px;
    margin-top: -10px;
    transform-style: preserve-3d;
}

.cloudLayer {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 400px;   
    height: 400px; 
    margin-left: -200px;
    margin-top: -200px;
    transition: opacity .5s ease-out;
}

.cloud-controls {
    position: absolute;
    top: 20px;
    right: 20px;
    z-index: 50;
}

.cloud-controls button {
    background: rgba(255, 255, 255, 0.7);
    border: none;
    padding: 8px 12px;
    margin: 0 5px;
    border-radius: 4px;
    cursor: pointer;

    color: #333;                 /* 文字颜色 - 深灰色 */
    font-family: Arial, sans-serif;  /* 字体 */
    font-size: 14px;             /* 字体大小 */
    font-weight: bold;           /* 粗体 */
}

.cloud-controls button:hover {
    background: rgba(255, 255, 255, 0.9);
}

.button-group {
    display: flex;
    margin-bottom: 10px;
    justify-content: flex-end;
}

.slider-control {
    margin-top: 10px;
    background: rgba(0,0,0,0.3);
    padding: 10px;
    border-radius: 5px;
    color: white;
    font-family: Arial, sans-serif;  /* 字体 */
    font-size: 14px;             /* 字体大小 */
   font-weight: bold;           /* 粗体 */
}

.slider-control label {
    display: block;
    margin-bottom: 5px;
}




/* 云聚集滑块样式，基于音量滑块样式改编为水平方向 */
#cluster-slider {
-webkit-appearance: none;
width: 100%; /* 水平方向，占满容器 */
height: 8px;
background: rgba(255, 255, 255, 0.5);
border-radius: 5px;
margin: 10px 0; /* 上下边距 */
}

#cluster-slider::-webkit-slider-thumb {
-webkit-appearance: none;
width: 12px;
height: 12px;
border-radius: 50%;
background: white;
cursor: pointer;
transition: width 0.3s ease, height 0.3s ease, background 0.3s ease, transform 0.3s ease;
}

#cluster-slider::-moz-range-thumb {
width: 12px;
height: 12px;
border-radius: 50%;
background: white;
cursor: pointer;
border: none;
transition: width 0.3s ease, height 0.3s ease, background 0.3s ease, transform 0.3s ease;
}

/* WebKit 浏览器的滑块按钮悬停效果 - 增加放大效果 */
#cluster-slider::-webkit-slider-thumb:hover {
width: 16px;
height: 16px;
background: #78c9ff; /* 蓝色 */
transform: scale(1.1); /* 额外的放大效果 */
}

/* Firefox 浏览器的滑块按钮悬停效果 - 增加放大效果 */
#cluster-slider::-moz-range-thumb:hover {
width: 16px;
height: 16px;
background: #78c9ff; /* 蓝色 */
transform: scale(1.1); /* 额外的放大效果 */
}

/* WebKit 浏览器的滑块按钮激活效果 - 点击状态 */
#cluster-slider::-webkit-slider-thumb:active {
width: 18px;
height: 18px;
background: rgb(132, 200, 255); /* 更深的蓝色 */
transform: scale(1.1); /* 更大的放大效果 */
}

/* Firefox 浏览器的滑块按钮激活效果 - 点击状态 */
#cluster-slider::-moz-range-thumb:active {
width: 18px;
height: 18px;
background: rgb(132, 200, 255); /* 更深的蓝色 */
transform: scale(1.1); /* 更大的放大效果 */
}