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

    :root {
        --blue: #007bff;
        --indigo: #6610f2;
        --purple: #6f42c1;
        --pink: #e83e8c;
        --red: #dc3545;
        --orange: #fd7e14;
        --yellow: #ffc107;
        --green: #28a745;
        --teal: #20c997;
        --cyan: #17a2b8;
        --white: #fff;
        --gray: #6c757d;
        --gray-dark: #343a40;
        --primary: #007bff;
        --secondary: #6c757d;
        --success: #28a745;
        --info: #17a2b8;
        --warning: #ffc107;
        --danger: #dc3545;
        --light: #f8f9fa;
        --dark: #343a40;
        --breakpoint-xs: 0;
        --breakpoint-sm: 576px;
        --breakpoint-md: 768px;
        --breakpoint-lg: 992px;
        --breakpoint-xl: 1200px;
        --font-family-sans-serif: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Liberation Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
        --font-family-monospace: SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    }
}

body {
    font-family: "微软雅黑", "Microsoft YaHei", "黑体", "Heiti SC", "PingFang SC", Arial, sans-serif;
    font-size: 1.5rem;
    font-weight: 400;
    line-height: 1.5;
    color: #212529;
    text-align: left;
    background-color: #fff;
    /* 移动端兼容性优化 */
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

.topBG {
    background-color: #0066cc;
}