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

body {
    font-family: "Microsoft Yahei", sans-serif;
    padding: 20px;
    background-color: #f5f5f5;
}

/* 顶部提示文字样式 */
.top-tip {
    text-align: center;
    font-size: 18px;
    color: #333;
    margin-bottom: 30px;
    padding: 15px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

/* 图片容器：3列布局，自动适配 */
.image-container {
    max-width: 900px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

/* 图片样式：保持比例，自适应容器 */
.buyer-img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 2px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.buyer-img:hover {
    transform: scale(1.02);
}

/* 按钮样式 */
.refresh-btn {
    display: block;
    width: 180px;
    height: 45px;
    line-height: 45px;
    text-align: center;
    background-color: #ff4400;
    color: #fff;
    font-size: 16px;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    margin: 0 auto;
    transition: background-color 0.3s ease;
}

.refresh-btn:hover {
    background-color: #e63e00;
}

/* 加载/空白提示样式 */
.tip-text {
    grid-column: 1 / -1; /* 跨3列居中显示 */
    text-align: center;
    color: #666;
    font-size: 16px;
    padding: 50px 0;
}