:root {
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: 1px solid rgba(255, 255, 255, 0.15);
    --text-main: #ffffff;
    --text-muted: rgba(255, 255, 255, 0.6);
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, "SF Pro Display", BlinkMacSystemFont, sans-serif;
    background-color: #050505;
    color: var(--text-main);
    min-height: 100vh;
    overflow-x: hidden;
}

/* 极光背景动画 */
.aurora-bg {
    position: fixed;
    top: -50%; left: -50%; width: 200%; height: 200%;
    background: radial-gradient(circle at 50% 50%, #1e1b4b 0%, #000000 60%),
                radial-gradient(circle at 80% 20%, #312e81 0%, transparent 40%),
                radial-gradient(circle at 20% 80%, #064e3b 0%, transparent 40%);
    filter: blur(100px);
    z-index: -1;
    animation: rotate 30s linear infinite;
    opacity: 0.8;
}

@keyframes rotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 60px 20px;
}

.header {
    text-align: center;
    margin-bottom: 80px;
}

.title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 10px;
    letter-spacing: -1px;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

/* 游戏/作品卡片 */
.project-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: var(--glass-border);
    border-radius: 24px;
    padding: 40px 30px;
    text-decoration: none;
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: all 0.4s cubic-bezier(0.25, 1, 0.5, 1);
    position: relative;
    overflow: hidden;
}

.project-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.12);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
    border-color: rgba(255, 255, 255, 0.3);
}

.project-card:active {
    transform: scale(0.96);
}

.card-icon {
    font-size: 54px;
    margin-bottom: 20px;
    filter: drop-shadow(0 4px 10px rgba(0,0,0,0.3));
}

.card-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.card-action {
    margin-top: 20px;
    font-size: 0.9rem;
    color: #4ade80; /* 柔和的霓虹绿，提示可运行 */
    font-weight: 500;
    opacity: 0.8;
}