body {
    margin: 0;
    padding: 20px;
    font-family: "微软雅黑", sans-serif;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 100vh;
}

.page {
    display: none;
    max-width: 1200px;
    margin: 0 auto;
    background: rgba(255,255,255,0.9);
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.1);
    text-align: center;
}

.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

h1 {
    color: #2c3e50;
    margin-bottom: 30px;
}

.nfc-prompt {
    font-size: 18px;
    color: #666;
    margin: 40px 0;
}

.btn {
    background: #3498db;
    color: white;
    padding: 12px 30px;
    border: none;
    border-radius: 25px;
    font-size: 16px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin: 5px;
}

.btn:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(52,152,219,0.3);
}

.message-box {
    text-align: left;
    background: #f8f9fa;
    padding: 20px;
    border-radius: 10px;
    margin: 20px 0;
}

.contact-link {
    color: #3498db;
    text-decoration: none;
    display: block;
    margin: 10px 0;
}

.glow-text {
    background: linear-gradient(90deg, #ff6b6b, #4ecdc4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: glow 2s ease-in-out infinite;
}

img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

@keyframes glow {
    0%, 100% { opacity: 0.8; }
    50% { opacity: 1; }
}

.tile-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.tile {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    padding: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    min-height: 200px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
}

.tile:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}

.tile h3 {
    color: white;
    margin: 0 0 10px 0;
    font-size: 20px;
}

.tile p {
    color: rgba(255,255,255,0.9);
    font-size: 14px;
    margin: 0;
}

.tile-video {
    background: linear-gradient(135deg, #4facfea7 0%, #00f1fe94 100%);
}

.tile-image {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.tile iframe {
    width: 100%;
    height: 180px;
    border-radius: 10px;
    margin-top: 10px;
}

.image-tile {
    background-size: cover;
    background-position: center;
    min-height: 250px;
    position: relative;
}

.image-tile::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.1) 100%);
    border-radius: 15px;
}

.image-tile h3 {
    position: relative;
    z-index: 1;
    margin-top: auto;
}

.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    z-index: 9999;
    justify-content: center;
    align-items: center;
    animation: fadeIn 0.3s ease;
}

.lightbox.active {
    display: flex;
}

.lightbox-content {
    position: relative;
    max-width: 90%;
    max-height: 90%;
    animation: zoomIn 0.3s ease;
}

.lightbox-image {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 10px;
    box-shadow: 0 10px 50px rgba(0,0,0,0.5);
}

.lightbox-title {
    position: absolute;
    bottom: -50px;
    left: 50%;
    transform: translateX(-50%);
    color: white;
    font-size: 24px;
    font-weight: bold;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.8);
    white-space: nowrap;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 40px;
    color: white;
    font-size: 40px;
    font-weight: bold;
    cursor: pointer;
    background: rgba(255,255,255,0.2);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 10000;
}

.lightbox-close:hover {
    background: rgba(255,255,255,0.3);
    transform: rotate(90deg);
}

@media (max-width: 768px) {
    .tile-grid {
        grid-template-columns: 1fr;
    }
    
    .page {
        padding: 20px;
    }
}