body { background-color: #363636; margin: 0; padding: 0; }

.container {
    color: #333;
}


h4 {
    color: white;                  /* 文字颜色设为白色 */
    background-color: #333;        /* 添加深色背景确保文字可见 */
    padding: 5px;                 /* 内边距增加可读性 */
    text-align: center;            /* 文字居中对齐 */
    margin: 0 -20px 20px -20px;    /* 边缘对齐容器 */
}.container {
    color: #333;                   /* 容器内默认文本颜色为深灰色 */
}

.image-container {
    width: 100%;
    height: 60vh;
    overflow: hidden;
    position: relative;
    border: 1px solid #ccc;
    margin-bottom: 20px;
    background-color: #000000;
}

.image-container img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: none;
}

.image-container img.active {
    display: block;
}

.loading {
    color: #333;
    text-align: center;
    line-height: 60vh;
    font-size: 18px;
}

.controls {
    text-align: center;
}

.btn {
    padding: 10px 20px;
    font-size: 16px;
    background-color: #4CAF50;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    margin-bottom: 10px;
}

.btn:hover {
    background-color: #45a049;
}

.info {
    color: #666;
    font-size: 14px;
}