function replaceMarks(md) {
    // 匹配代码块
    let codeBlockRegex = /```[\s\S]*?```/g;

    // 将代码块替换为占位符，避免在后续处理中受到影响
    let placeholders = [];
    md = md.replace(codeBlockRegex, function(match) {
        let placeholder = `CODE_BLOCK_${placeholders.length}`;
        placeholders.push(match);
        return placeholder;
    });

    // 匹配行内代码块
    let inlineCodeRegex = /`[^`]*`/g;
    let inlineCodePlaceholders = [];
    md = md.replace(inlineCodeRegex, function(match) {
        let placeholder = `INLINE_CODE_${inlineCodePlaceholders.length}`;
        inlineCodePlaceholders.push(match);
        return placeholder;
    });

    // 正则表达式，匹配严格符合 == 开始和结束的部分，但不在代码块和行内代码块内
    let regex = /(?<!`|```)==([^=]+)==(?!.*(?:`|```))(?!.*INLINE_CODE_\d+)/g;

    // 替换非代码块和行内代码块内的 == 部分
    md = md.replace(regex, '<span style="font-weight: bold;" class="mark">$1</span>');

    // 将代码块恢复回去
    for (let i = 0; i < placeholders.length; i++) {
        md = md.replace(`CODE_BLOCK_${i}`, placeholders[i]);
    }

    // 将行内代码块恢复回去
    for (let i = 0; i < inlineCodePlaceholders.length; i++) {
        md = md.replace(`INLINE_CODE_${i}`, inlineCodePlaceholders[i]);
    }

    return md;
}

// 测试函数
let md = `
==This should be bold==

\`\`\`javascript
// This is a code block
let x = 10;
console.log(x);
\`\`\`

This is an `inline code block`.

==This should also be bold==
`;

let processedMd = replaceMarks(md);
console.log(processedMd);