with open('/www/wwwroot/gaokao/index.html', 'r') as f:
    c = f.read()

old_footer_right = '      <div class="footer-right">\n        <p class="footer-contact-title">遇到问题？</p>\n        <p style="color:#555;font-size:0.8rem">联系邮箱：shangdiyefeng@vip.qq.com</p>\n      </div>'

new_footer_right = '      <div class="footer-right">\n        <div class="footer-contact-col">\n          <p class="footer-contact-title">遇到问题？</p>\n          <p style="color:#555;font-size:0.8rem">联系邮箱：shangdiyefeng@vip.qq.com</p>\n        </div>\n        <div class="footer-contact-col" style="text-align:right">\n          <p class="footer-contact-title">赞赏支持</p>\n          <a href="/support.html" class="footer-donate-btn">☕ 支持运营</a>\n        </div>\n      </div>'

if old_footer_right in c:
    c = c.replace(old_footer_right, new_footer_right)
    
    # Update grid columns
    c = c.replace('.footer-inner { display: grid; grid-template-columns: 1fr auto; gap: 40px;',
                  '.footer-inner { display: grid; grid-template-columns: 1fr auto auto; gap: 40px;')
    
    # Add donate button CSS
    donate_css = '.footer-donate-btn{display:inline-block;margin-top:6px;color:#667eea;text-decoration:none;font-size:0.85rem;padding:5px 14px;border-radius:20px;border:1px solid rgba(102,126,234,0.3);transition:all 0.3s}.footer-donate-btn:hover{background:rgba(102,126,234,0.1);border-color:#667eea}'
    
    # Update contact-title alignment (remove text-align:right default)
    c = c.replace('.footer-contact-title { color: #888; font-size: 0.82rem; margin-bottom: 10px; text-align: right; }',
                  '.footer-contact-title { color: #888; font-size: 0.82rem; margin-bottom: 10px; }')
    
    # Insert donate CSS before .footer-qr  
    c = c.replace('.footer-qr {',
                  donate_css + ' .footer-qr {')
    
    with open('/www/wwwroot/gaokao/index.html', 'w') as f:
        f.write(c)
    print('Done! Footer updated with donate button')
else:
    print('Pattern not found')
    # Debug: find footer-right
    idx = c.find('footer-right')
    if idx >= 0:
        print('Context:', repr(c[idx-50:idx+150]))