/* 清除内外边距 */
body, h1, h2, h3, h4, h5, h6, p, ul, ol, li, img, a {
    margin: 0;
    padding: 0;
    }
    
    /* 设置默认字体 */
    body, button, input, select, textarea {
    font-family: 'Tahoma', 'Arial', sans-serif;
    font-size: 14px;
    line-height: 1.5;
    }
    
    /* 重置列表元素 */
    ul, ol {
    list-style: none;
    }
    
    /* 重置文本格式元素 */
    a {
    text-decoration: none;
    }
    a:hover {
    text-decoration: underline;
    }

    .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
    }

    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    select:focus-visible,
    textarea:focus-visible,
    [tabindex]:focus-visible {
    outline: 3px solid rgba(238, 130, 238, 0.65);
    outline-offset: 3px;
    }
    
    /* 重置表单元素 */
    input, button, select, textarea {
    border: none;
    outline: none;
    }
    
    /* 重置图片和对象元素 */
    img, object {
    border: none;
    vertical-align: top;
    }
    
    /* 重置强调元素 */
    em, strong {
    font-style: normal;
    font-weight: normal;
    }
    
    /* 重置按钮样式 */
    button {
    background: none;
    /* -webkit-appearance: none; */
    }
    
    /* 重置选择框样式 */
    select {
    background: url("arrow.png") no-repeat right center;
    /* -webkit-appearance: none; */
    }
    
    /* 重置输入框占位符样式 */
    input::placeholder {
    color: #888;
    }