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

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    overflow: hidden;
}

body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.container {
    position: relative;
    width: 100%;
    height: 100vh;
}

.header {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px;
    z-index: 10;
}

.description {
    color: white;
    font-size: 14px;
    opacity: 0.8;
}

.main-image-section {
    position: absolute;
    top: 0;
    right: 0;
    width: 60%;
    height: 100%;
    overflow: hidden;
}

.scrolling-images {
    display: flex;
    width: 200%;
    height: 100%;
    animation: scroll 20s linear infinite;
}

.scrolling-image {
    width: 50%;
    height: 100%;
    background-image: url('images/changtu.jpg');
    background-size: cover;
    background-position: center;
}

@keyframes scroll {
    0% { transform: translateX(0); }
    100% { transform: translateX(-50%); }
}

.left-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 40%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 40px;
    z-index: 10;
}

.title-text {
    font-size: 48px;
    font-weight: bold;
    color: white;
    margin-bottom: 30px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
}

.left-image-text-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.left-image {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    overflow: hidden;
    border: 4px solid white;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}

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

.text-label {
    color: white;
    font-size: 13px;
    text-align: center;
    line-height: 1.6;
    opacity: 0.9;
    max-width: 300px;
}

.thumbnails {
    position: absolute;
    bottom: 20px;
    right: 0;
    width: 60%;
    padding: 0 40px;
    z-index: 10;
}

.thumbnails-container {
    display: flex;
    justify-content: center;
    gap: 10px;
    overflow-x: auto;
}

.thumbnail {
    width: 60px;
    height: 60px;
    border-radius: 8px;
    object-fit: cover;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.3s, transform 0.3s;
    border: 2px solid rgba(255,255,255,0.3);
}

.thumbnail:hover {
    opacity: 1;
    transform: scale(1.1);
    border-color: white;
}

.download-button {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
    color: white;
    padding: 15px 40px;
    border-radius: 30px;
    font-size: 18px;
    font-weight: bold;
    text-decoration: none;
    box-shadow: 0 10px 30px rgba(255,107,107,0.4);
    transition: transform 0.3s, box-shadow 0.3s;
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 10px;
}

.download-button:hover {
    transform: translateX(-50%) scale(1.05);
    box-shadow: 0 15px 40px rgba(255,107,107,0.5);
}

.download-button span {
    background: rgba(255,255,255,0.2);
    padding: 5px 15px;
    border-radius: 20px;
}

.light {
    display: none;
}

@media (max-width: 768px) {
    .main-image-section {
        width: 100%;
        height: 50%;
    }
    
    .left-container {
        width: 100%;
        height: 50%;
        top: 50%;
        padding: 20px;
    }
    
    .title-text {
        font-size: 32px;
    }
    
    .left-image {
        width: 120px;
        height: 120px;
    }
    
    .thumbnails {
        width: 100%;
        bottom: 80px;
    }
    
    .thumbnail {
        width: 50px;
        height: 50px;
    }
}