/* 玻璃拟态背景相关样式 */
body {
    background: linear-gradient(135deg, 
        #667eea 0%, 
        #764ba2 25%, 
        #f093fb 50%, 
        #f5576c 75%, 
        #4facfe 100%
    );
    background-size: 400% 400%;
    animation: gradientShift 20s ease infinite;
    background-attachment: fixed;
    min-height: 100vh;
    position: relative;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    25% { background-position: 100% 50%; }
    50% { background-position: 100% 100%; }
    75% { background-position: 0% 100%; }
    100% { background-position: 0% 50%; }
}

/* 玻璃拟态装饰层 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 40% 60%, rgba(255, 255, 255, 0.06) 0%, transparent 30%),
        radial-gradient(circle at 60% 30%, rgba(255, 255, 255, 0.05) 0%, transparent 35%);
    pointer-events: none;
    z-index: -1;
    animation: glassFloat 25s ease-in-out infinite alternate;
}

/* 毛玻璃气泡效果 */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(255, 255, 255, 0.3) 2px, transparent 2px),
        radial-gradient(circle at 30% 40%, rgba(255, 255, 255, 0.25) 3px, transparent 3px),
        radial-gradient(circle at 50% 60%, rgba(255, 255, 255, 0.2) 1.5px, transparent 1.5px),
        radial-gradient(circle at 70% 80%, rgba(255, 255, 255, 0.3) 2.5px, transparent 2.5px),
        radial-gradient(circle at 90% 10%, rgba(255, 255, 255, 0.25) 2px, transparent 2px),
        radial-gradient(circle at 20% 90%, rgba(255, 255, 255, 0.2) 1px, transparent 1px);
    background-size: 300px 300px, 250px 250px, 400px 400px, 200px 200px, 350px 350px, 150px 150px;
    animation: bubbleFloat 30s linear infinite;
    pointer-events: none;
    z-index: -1;
    opacity: 0.7;
}

@keyframes glassFloat {
    0% {
        transform: translateY(0px) rotate(0deg);
        opacity: 0.7;
    }
    100% {
        transform: translateY(-20px) rotate(2deg);
        opacity: 0.9;
    }
}

@keyframes bubbleFloat {
    0%, 100% {
        transform: translateX(0) translateY(0);
    }
    25% {
        transform: translateX(-15px) translateY(-10px);
    }
    50% {
        transform: translateX(10px) translateY(-20px);
    }
    75% {
        transform: translateX(-5px) translateY(-15px);
    }
}
