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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    overflow: hidden;
    height: 100vh;
    position: relative;
}

#starsCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    background: linear-gradient(180deg, #0a0e27 0%, #1a1a2e 50%, #16213e 100%);
}

.container {
    position: relative;
    z-index: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    padding: 20px;
}

.notification-box {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 60px 50px;
    text-align: center;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3),
                inset 0 1px 0 rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.18);
    max-width: 500px;
    width: 100%;
    animation: fadeInUp 1s ease-out;
    transition: transform 0.3s ease;
}

.notification-box:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4),
                inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.icon {
    font-size: 64px;
    margin-bottom: 20px;
    animation: pulse 2s ease-in-out infinite;
}

.title {
    font-size: 36px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 16px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    letter-spacing: 1px;
}

.message {
    font-size: 24px;
    color: #ffd700;
    margin-bottom: 12px;
    font-weight: 600;
    text-shadow: 0 2px 8px rgba(255, 215, 0, 0.3);
}

.sub-message {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    line-height: 1.6;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 16px 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #ffffff;
    text-decoration: none;
    border-radius: 50px;
    font-size: 18px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
    background: linear-gradient(135deg, #764ba2 0%, #667eea 100%);
}

.btn:active {
    transform: translateY(0);
}

.btn span {
    position: relative;
    z-index: 1;
}

.arrow {
    position: relative;
    z-index: 1;
    transition: transform 0.3s ease;
}

.btn:hover .arrow {
    transform: translateX(5px);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.1);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .notification-box {
        padding: 40px 30px;
    }
    
    .icon {
        font-size: 48px;
    }
    
    .title {
        font-size: 28px;
    }
    
    .message {
        font-size: 20px;
    }
    
    .sub-message {
        font-size: 16px;
    }
    
    .btn {
        padding: 14px 32px;
        font-size: 16px;
    }
}