body {
  font-family: Arial, sans-serif;
  margin: 0;
  background: #f0f8ff;
  color: #333;
}

header {
  background: #3399ff;
  color: white;
  padding: 20px;
  text-align: center;
}

header h1 {
  margin: 0;
}

main {
  padding: 20px;
}

.upload-section, .preview-section, .case-studies, .reviews, .faq {
  width: 80%;
  margin: 20px auto;
  padding: 20px;
  background: white;
  border-radius: 10px;
  box-shadow: 0 2px 6px rgba(0,0,0,0.1);
}

/* 上传区域 */
.drop-zone {
  border: 2px dashed #3399ff;
  border-radius: 10px;
  padding: 30px;
  text-align: center;
  cursor: pointer;
  background: #f9fcff;
  display: flex;
  justify-content: center; /* 水平居中 */
  align-items: center; 
  flex-direction: column;
  height: 265px;
}
.drop-zone.highlight {
  background: #e0f2ff;
  border-color: #007acc;
}
.note {
  font-size: 12px;
  color: #666;
  margin-top: 10px;
}

/* 转换结果 */
.result-list {
  list-style: none;
  padding: 0;
  margin: 20px 0;
}
.result-item {
  display: flex;
  align-items: center;
  margin-bottom: 12px;
  padding: 8px;
  border: 1px solid #ddd;
  border-radius: 6px;
  background: #f9fcff;
}
.result-item img.thumb {
  width: 80px;
  height: auto;
  margin-right: 12px;
  border: 1px solid #ccc;
  border-radius: 4px;
}
.result-item span {
  flex: 1;
  font-size: 14px;
  margin-right: 10px;
}
.result-item .download-btn {
  padding: 6px 10px;
  font-size: 13px;
  background: #3399ff;
  color: #fff;
  text-decoration: none;
  border-radius: 4px;
}
.result-item .download-btn:hover {
  background: #007acc;
}
.download-all {
  margin-top: 10px;
  padding: 10px 15px;
  background: #3399ff;
  color: #fff;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}
.download-all:disabled {
  background: #ccc;
}

/* 案例展示 */
.case-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
}
.case-item {
  display: flex;
  gap: 15px;
  align-items: flex-start;
}
.case-item img {
  width: 150px;
  height: auto;
  border-radius: 6px;
}
.case-item h3 {
  margin: 0;
  font-size: 16px;
  color: #007acc;
}
.case-item p {
  margin: 5px 0 0;
  font-size: 14px;
  color: #555;
}

/* 用户评价 */
.review-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
}
.review-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.review-item img {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  border: 1px solid #ccc;
}
.review-item h3 {
  margin: 0;
  font-size: 15px;
  color: #007acc;
}
.review-item h3 span {
  font-size: 13px;
  color: #666;
}
.review-item p {
  margin: 5px 0 0;
  font-size: 14px;
  color: #444;
}

/* FAQ */
.qa h3 {
  margin-bottom: 5px;
  color: #007acc;
}

/* Footer */
footer {
  text-align: center;
  padding: 15px;
  background: #3399ff;
  color: white;
  margin-top: 30px;
}