body {
    margin: 0;
    padding: 0;
    font-family: Arial, sans-serif;
    background-color: #f0f0f0;
}

#app {
    position: relative;
    width: 100vw;
    height: 100vh;
    overflow: hidden;
}

.image-container {
    width: 100%;
    height: 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: #000;
}

.image-container img {
    max-width: 100%;
    max-height: 100%;
    width: auto;
    height: auto;
    object-fit: contain;
}

/* 响应式图片容器 */
@media (max-width: 768px) {
    .image-container img {
        max-width: 100vw;
        max-height: calc(100vh - 100px);
        object-fit: contain;
    }
}

.button-container {
    position: absolute;
    left: 20px;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 15px;
    z-index: 100;
}

.category-button {
    padding: 12px 20px;
    background-color: rgba(255, 255, 255, 0.8);
    border: 2px solid #333;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    font-weight: bold;
    transition: all 0.3s ease;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
}

.category-button:before {
    content: "🦖";
    position: absolute;
    left: 5px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 18px;
}

.category-button span {
    margin-left: 20px;
}

.category-button:hover {
    background-color: rgba(255, 255, 255, 1);
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
}

.back-button {
    position: absolute;
    top: 20px;
    left: 20px;
    padding: 10px 15px;
    background-color: rgba(255, 255, 255, 0.8);
    border: 2px solid #333;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: bold;
    z-index: 100;
    transition: all 0.3s ease;
}

.back-button:hover {
    background-color: rgba(255, 255, 255, 1);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
}

/* 恐龙装饰元素 */
.dinosaur-decoration {
    position: absolute;
    font-size: 36px;
    z-index: 50;
    opacity: 0.7;
}

.dinosaur-decoration-top {
    top: 20px;
    right: 30px;
}

.dinosaur-decoration-bottom {
    bottom: 20px;
    left: 30px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .button-container {
        left: 10px;
    }
    
    .category-button {
        padding: 10px 15px;
        font-size: 14px;
    }
    
    .back-button {
        top: 10px;
        left: 10px;
        padding: 8px 12px;
        font-size: 12px;
    }
    
    .dinosaur-decoration {
        font-size: 24px;
    }
    
    .dinosaur-decoration-top {
        top: 10px;
        right: 15px;
    }
    
    .dinosaur-decoration-bottom {
        bottom: 10px;
        left: 15px;
    }
}