/* 壁纸系统样式 */
.wallpaper-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -10;
    overflow: hidden;
}

.wallpaper-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    transition: opacity 0.4s ease, transform 0.6s ease;
}

.bing-layer {
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    opacity: 0;
    transform: scale(1.05);
    z-index: 1;
}

.effect-layer {
    background: linear-gradient(to bottom, 
                rgba(0, 0, 0, 0.2) 0%, 
                rgba(0, 0, 0, 0.1) 40%, 
                rgba(0, 0, 0, 0.1) 60%, 
                rgba(0, 0, 0, 0.4) 100%);
    opacity: 0;
    z-index: 2;
    pointer-events: none;
}

.particles-layer {
    opacity: 0;
    z-index: 0;
    transition: opacity 0.5s ease;
}

/* 壁纸加载动画 */
@keyframes pulse {
    0% { opacity: 0.6; }
    50% { opacity: 0.8; }
    100% { opacity: 0.6; }
}

.wallpaper-loading .bing-layer {
    animation: pulse 1s infinite ease-in-out;
}