/* 全局部署 */
html {
    line-height: 1.5; /* 行高 */
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    user-select: none;
}
body {
    max-width: 800px;
    margin: 0 auto;
    padding: 0;
    color: #4c4c4c;
    font: 17px/1.5 "Microsoft YaHei", sans-serif; /* 字体大小+行高+微软字体 */
    font-weight: bold;  /* 标准加粗 */
    text-align: center; /* 所有文本居中 */
}

 .header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            margin: 0 auto;
            max-width: 800px;
            height: 44px;
            padding: 0 10px;
            font-size: 14px;
            box-sizing: border-box;
            background: #007fff;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 9;
        }
.header h3 {
            font-size: 19px;
            font-weight: normal;
            color: #ffffff;
            margin: 0;
        }
.header a {
            padding: 2px 8px;
            color: #ffffff;
            border: 1px solid #ccc;
            border-radius: 3px;
            transition: background-color 0.3s ease;
        }
.header a:hover {
            background-color: rgba(255, 255, 255, 0.1);
        }