/* 欢迎信息 */
#welcome-info {
  background: linear-gradient(45deg, #b9f4f3, #e3fbf9);
  border-radius: 18px;
  padding: 8px;
}
[data-theme="dark"] #welcome-info {
  background: #212121;
}
/* 背景变暗效果 */
.darkened-background {
    position: relative;
}

.darkened-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.4);
    z-index: 1;
}

.darkened-background > * {
    position: relative;
    z-index: 2;
}

/* 针对首页英雄区域 */
.hero-section::before {
    background: rgba(0, 0, 0, 0.5);
}

/* 针对文章卡片背景 */
.post-bg::before {
    background: rgba(0, 0, 0, 0.3);
}

/* 首页头图加载   12.6日 */
.pl-container {
    width: 100%;
    height: 100%;
    z-index: -2;
    position: fixed;
    overflow: hidden;
    will-change: transform; /* 添加性能优化 */
    animation: blur-to-clear 2s cubic-bezier(.62,.21,.25,1) 0s 1 normal backwards running, scale 1.5s cubic-bezier(.62,.21,.25,1) 0s 1 both;
  }
  .pl-img {
    width: 100%;
    height: 100%;
    position: absolute;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
    opacity: 0;
    transition: opacity 1s;
  }
  
  @keyframes blur-to-clear {
    0% {
      filter: blur(50px);
      opacity: 1;
    }
    100% {
      filter: blur(0);
      opacity: 1;
    }
  }
  
  @keyframes scale {
    0% {
      transform: scale(1.5) translateZ(0);
      opacity: 0;
    }
    to {
      transform: scale(1) translateZ(0);
      opacity: 1;
    }
  }
  
  .pl-visible {
    opacity: 1;
  }
  
  .pl-blur {
   /* 小图锯齿多，增加高斯模糊 */
    filter: blur(50px);
  }

/* 页脚透明 */
#footer {
    background: transparent !important;
  }
  
/* 头图透明 */
#page-header {
    background: transparent !important;
  }
/* 底部透明 */
#footer-bar{
    background: transparent !important;
}

/* 更多透明 */
#category-bar{
    background: transparent !important;
}