/* ================= 文章底部容器 ================= */
.custom-article-footer {
  margin: 60px 0 40px;
  padding: 40px 0;
  border-top: 1px solid #e5e7eb;
  border-bottom: 1px solid #e5e7eb;
}

/* ================= 版权信息区块 ================= */
.copyright-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.copyright-text {
  position: relative;
  padding-left: 30px;
  margin-bottom: 50px;
}

/* 左侧渐变装饰线 */
.copyright-text::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  bottom: 5px;
  width: 4px;
  background: linear-gradient(180deg, #3B82F6 0%, #10B981 100%);
  border-radius: 2px;
}

.copyright-info {
  color: #4b5563;
  line-height: 1.8;
  font-size: 15px;
}

.copyright-symbol {
  font-size: 1.2em;
  margin-right: 5px;
}

.author-highlight {
  color: #2563eb;
  font-weight: 600;
}

.email-link {
  color: #10B981;
  text-decoration: none;
  border-bottom: 1px dashed rgba(16, 185, 129, 0.3);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.email-link:hover {
  color: #059669;
  border-bottom-style: solid;
}

.donate-hint {
  color: #6b7280;
  margin-top: 25px;
  font-size: 15px;
}

/* ================= 双码布局 ================= */
.donate-wrapper {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 60px;
  max-width: 800px;
  margin: 0 auto;
}

.donate-column {
  text-align: center;
  padding: 25px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 16px;
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.donate-column:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

.qr-image {
  width: 100%;
  max-width: 240px;
  height: auto;
  border-radius: 12px;
  border: 1px solid #e5e7eb;
  padding: 5px;
  background: white;
}

.qr-description {
  color: #374151;
  margin-top: 20px;
  font-size: 15px;
  font-weight: 500;
}

/* ================= 移动端适配 ================= */
@media (max-width: 1024px) {
  .donate-wrapper {
    gap: 40px;
  }
}

@media (max-width: 768px) {
  .custom-article-footer {
    margin: 40px 0;
    padding: 30px 0;
  }

  .donate-wrapper {
    grid-template-columns: 1fr;
    gap: 40px;
    max-width: 100%;
  }

  .copyright-text {
    padding-left: 20px;
    margin-bottom: 40px;
  }

  .copyright-text::before {
    width: 3px;
  }
}

@media (max-width: 480px) {
  .qr-image {
    max-width: 200px;
  }
  
  .donate-column {
    padding: 20px;
  }
}