/* 动态粒子背景 
background: linear-gradient(135deg, #9389e830 0%, #0a7bbb2b 50%, #fa24242b 100%);
*/
.particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(138, 43, 226, 0.6);
    border-radius: 50%;
    animation: float 20s infinite linear;
    opacity: 0;
}

.particle:nth-child(3n) {
    background: rgba(65, 105, 225, 0.6);
    animation-duration: 25s;
}

.particle:nth-child(5n) {
    background: rgba(147, 51, 234, 0.4);
    animation-duration: 30s;
}

@keyframes float {
    from {
        transform: translateY(100vh) translateX(0);
        opacity: 0;
    }
    10% {
        opacity: .6;
    }
    90% {
        opacity: .6;
    }
    to {
        transform: translateY(-10vh) translateX(50px);
        opacity: 0;
    }
}