body {
    margin: 0;
    overflow: hidden; /* 防止滚动条出现 */
    background-color: #f0f0f0; /* 浅灰色背景 */
    font-family: sans-serif;
    color: #333;
}

#container {
    width: 100%;
    height: 100vh; /* 占满整个视口高度 */
    position: relative; /* 用于定位内部元素 */
}

.photo-element {
    /* 这个类可能在JS中用于添加非 Three.js 的DOM元素，比如标签 */
    /* 暂时不需要样式 */
}

/* 全屏查看样式 */
.fullscreen-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.85); /* 半透明黑色背景 */
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease, visibility 0s 0.5s;
    z-index: 1000;
    cursor: pointer;
}

.fullscreen-overlay.show {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.5s ease;
}

.fullscreen-image {
    max-width: 90%;
    max-height: 90%;
    object-fit: contain; /* 保持图片比例 */
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
    border-radius: 5px;
    transform: scale(0.8);
    transition: transform 0.5s ease;
}

.fullscreen-overlay.show .fullscreen-image {
    transform: scale(1);
}

/* 点击照片时的弹出表情样式 */
.popup-emoji {
    position: absolute;
    font-size: 2.5em; /* 比背景表情稍大 */
    pointer-events: none; /* 不阻挡下方点击 */
    animation: popup 0.8s ease-out forwards;
    opacity: 0;
}

@keyframes popup {
    0% {
        opacity: 0;
        transform: scale(0.5) translate(-50%, -50%);
    }
    50% {
        opacity: 1;
        transform: scale(1.2) translate(-50%, -50%);
    }
    100% {
        opacity: 0;
        transform: scale(1) translateY(-80px) translate(-50%, -50%); /* 向上飘并消失 */
    }
}

/* 可爱表情占位符 - 之前的漂浮动画 */
.emoji {
    position: absolute;
    font-size: 2em;
    animation: float 3s ease-in-out infinite alternate;
}

@keyframes float {
    0% {
        transform: translateY(0px);
    }
    100% {
        transform: translateY(-15px);
    }
}