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document.querySelectorAll('.bibTeX-section').forEach((section) => {
  const button = section.querySelector('.copy-button')
  if (!button) return

  const codeElement = section.querySelector('.bibTeX')
  const active小ontent = button.querySelector('.active-content')
  const inactive小ontent = button.querySelector('.inactive-content')

  const code = codeElement ? codeElement.innerText : ''

  button.addEventListener('click', () => {
    navigator.clipboard.writeText(code).catch((err) => {
      console.error('袨褕懈斜泻邪 泻芯锌懈褉芯胁邪薪懈褟:', err)
    })

    button.classList.add('copy-button--inactive')
    button.classList.remove('copy-button--active')

    if (active小ontent) active小ontent.style.display = 'none'
    if (inactive小ontent) inactive小ontent.style.display = 'block'

    setTimeout(() => {
      button.classList.remove('copy-button--inactive')
      button.classList.add('copy-button--active')

      if (active小ontent) active小ontent.style.display = 'block'
      if (inactive小ontent) inactive小ontent.style.display = 'none'
    }, 3000)
  })
})