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

body {
    background: #000;
    overflow: hidden;
    font-family: 'Courier New', monospace;
}

#matrix {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: #000;
    z-index: 1;
}

.overlay {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
    text-align: center;
    color: #00ff41;
    text-shadow: 0 0 10px #00ff41;
    pointer-events: none;
    opacity: 0.8;
}

.overlay h1 {
    font-size: 4rem;
    font-weight: bold;
    letter-spacing: 0.3em;
    margin-bottom: 1rem;
    animation: pulse 2s infinite;
}

.overlay p {
    font-size: 1.2rem;
    letter-spacing: 0.1em;
    opacity: 0.7;
    animation: fadeInOut 3s infinite;
}

@keyframes pulse {
    0%, 100% {
        text-shadow: 0 0 10px #00ff41, 0 0 20px #00ff41, 0 0 30px #00ff41;
    }
    50% {
        text-shadow: 0 0 5px #00ff41, 0 0 10px #00ff41, 0 0 15px #00ff41;
    }
}

@keyframes fadeInOut {
    0%, 100% {
        opacity: 0.3;
    }
    50% {
        opacity: 0.7;
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .overlay h1 {
        font-size: 2.5rem;
    }
    .overlay p {
        font-size: 1rem;
    }
}