/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: 
        var(--bg-body),
        radial-gradient(circle at 80% 20%, #303f9f20 0%, transparent 50%),
        radial-gradient(circle at 20% 80%, #3f51b520 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, #ffffff03 0%, transparent 50%);
    background-attachment: fixed;
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, #ffffff60, transparent),
        radial-gradient(2px 2px at 40px 70px, #ffffff40, transparent),
        radial-gradient(1px 1px at 90px 40px, #ffffff80, transparent),
        radial-gradient(1px 1px at 130px 80px, #ffffff60, transparent),
        radial-gradient(2px 2px at 160px 30px, #ffffff40, transparent);
    background-repeat: repeat;
    background-size: 200px 100px;
    animation: twinkle 4s infinite;
    pointer-events: none;
    z-index: -1;
}

@keyframes twinkle {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 1; }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    width: 100%;
    box-sizing: border-box;
    overflow-x: hidden;
}

.hidden {
    display: none;
}

.loading {
    text-align: center;
    padding: 50px;
    color: var(--text-secondary);
}

.error {
    background: #da3633;
    color: white;
    padding: 15px;
    border-radius: 6px;
    margin: 20px;
}