:root {
    --pink-primary: #ff7eb3;
    --pink-secondary: #ff758c;
    --pink-deep: #ff4d94;
    --card-bg: rgba(20, 20, 20, 0.75);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
    background-color: transparent;
}

.bg-layer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -100;
    overflow: hidden;
}

.bg-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 2s ease-in-out;
    background-size: cover;
    background-position: center;
}

.bg-item.active {
    opacity: 1;
}

.bg-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -99;
    background: radial-gradient(ellipse at center, rgba(0,0,0,0.3) 0%, rgba(0,0,0,0.6) 100%);
    pointer-events: none;
}