body, html {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow: hidden;
}

#backgroundImage {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    background-size: cover;
    background-position: center;
    transition: background-image 0.5s ease-in-out, opacity 0.5s ease-in-out;
    z-index: 1;
    cursor: pointer; /* 显示可点击的光标 */
    opacity: 1; /* 初始透明度为1 */
}

.content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: #fff;
    z-index: 3;
    pointer-events: auto; /* 确保内容可以点击 */
    background-color: rgba(0, 0, 0, 0.5); /* 半透明底 */
    padding: 10px; /* 调整内边距 */
    border-radius: 10px;
}

p {
    font-size: 2em; /* 增大字体 */
    cursor: pointer; /* 显示可点击的光标 */
    margin: 0; /* 移除段落的默认外边距 */
}

#particleCanvas {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: 2; /* 粒子画布在背景图片之上 */
    pointer-events: none; /* 忽略粒子画布的点击事件 */
}

#photoFrame {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 300px;
    height: 300px;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    z-index: 2; /* 确保照片在背景图片之上 */
    cursor: pointer; /* 显示可点击的光标 */
}

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

/* 响应式设计 */
@media (max-width: 600px) {
    #photoFrame {
        width: 200px;
        height: 200px;
    }

    p {
        font-size: 1.5em; /* 调整小屏幕字体大小 */
    }
}