body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  max-width: 800px;
  margin: 0 auto;
  padding: 0;
  background-color: #f5f5f5;
  height: 100vh;
  display: flex;
  flex-direction: column;
}

#chatBox {
  flex: 1;
  background: #ededed;
  padding: 20px;
  overflow-y: auto;
  margin: 50px;
  border-radius: 18px;
  position: relative;
  display: flex;
  flex-direction: column;
  padding-bottom: 80px;
  scrollbar-width: none;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  /* Firefox */
  -ms-overflow-style: none;
  /* IE and Edge */
}

#chatBox::-webkit-scrollbar {
  display: none;
  /* Chrome, Safari, Opera */
}

.messages-container {
  flex: 1;
  overflow-y: auto;
  padding: 20px;
  scrollbar-width: none;
  /* Firefox */
  -ms-overflow-style: none;
  /* IE and Edge */
}

.messages-container::-webkit-scrollbar {
  display: none;
  /* Chrome, Safari, Opera */
}

.message {
  margin: 10px 0;
  padding: 10px 15px;
  border-radius: 4px;
  max-width: 70%;
  word-wrap: break-word;
  position: relative;
  line-height: 1.5;
  font-size: 15px;
  width: max-content;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  flex-shrink: 0;
}

.message-content {
  padding: 10px 15px;
  border-radius: 15px;
}

.user-message {
  width: max-content;
  margin-left: auto;
  flex-direction: row-reverse;
}

.user-message .message-content {
  background: #95ec69;
  border-radius: 15px 0 15px 15px;
}

.bot-message {
  background: white;
  margin-right: auto;
  border-radius: 0 15px 15px 15px;
}

#inputArea {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  padding: 15px;
  background: white;
  border-radius: 20px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  width: calc(100% - 100px);
  max-width: 600px;
  box-sizing: border-box;
}

#userInput {
  flex-grow: 1;
  padding: 8px 12px;
  border: 1px solid #ddd;
  border: none;
  border-radius: 4px;
  font-size: 15px;
  background: white;
  outline: none;
}

#userInput:focus {
  border-color: #07c160;
}

button {
  display: flex;
  justify-content: center;
  align-items: center;
  background: #07c160;
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s;
  font-size: 15px;
  border-radius: 50%;
  width: 40px;
  height: 40px;
  position: absolute;
  right: 18px;
}

button:hover {
  background: #06ae56;
}

button:disabled {
  background: #9fd7b5;
  cursor: not-allowed;
}

/* Markdown 样式优化 */
.message pre {
  background: #f8f9fa;
  padding: 12px;
  border-radius: 4px;
  overflow-x: auto;
  margin: 8px 0;
  font-size: 14px;
}

.message code {
  font-family: Menlo, Monaco, Consolas, "Courier New", monospace;
  background: rgba(0, 0, 0, 0.05);
  padding: 2px 4px;
  border-radius: 3px;
  font-size: 14px;
}

.message p {
  margin: 0;
}

.message p+p {
  margin-top: 8px;
}

/* 滚动条样式 */
#chatBox::-webkit-scrollbar {
  width: 6px;
}

#chatBox::-webkit-scrollbar-track {
  background: #f1f1f1;
}

#chatBox::-webkit-scrollbar-thumb {
  background: #c1c1c1;
  border-radius: 3px;
}

#chatBox::-webkit-scrollbar-thumb:hover {
  background: #a8a8a8;
}

/* 适配移动端 */
@media (max-width: 768px) {
  body {
    max-width: 100%;
    height: 100vh;
    padding: 0;
  }

  .message {
    max-width: 85%;
  }

  #inputArea {
    padding: 10px;
  }
}

.upload-button-container {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 1000;
}

.upload-btn {
  background-color: #000;
  color: white;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 16px;
  transition: background-color 0.3s;
  bottom: 50px;
}

.upload-btn:hover {
  background-color: #1a1a1a;
}

.upload-dialog {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1001;
}

.upload-dialog-content {
  position: relative;
  background-color: #fefefe;
  margin: 15% auto;
  padding: 20px;
  border-radius: 5px;
  width: 60%;
  max-width: 500px;
}

.close-btn {
  position: absolute;
  right: 10px;
  top: 5px;
  font-size: 24px;
  cursor: pointer;
  color: #888;
}

.close-btn:hover {
  color: #555;
}

.upload-area {
  border: 2px dashed #ccc;
  border-radius: 5px;
  padding: 20px;
  text-align: center;
  margin: 20px 0;
  cursor: pointer;
  transition: border-color 0.3s;
}

.upload-area:hover {
  border-color: #4caf50;
}

.upload-placeholder {
  color: #666;
}

.upload-placeholder i {
  font-size: 48px;
  color: #4caf50;
  margin-bottom: 10px;
}

.supported-formats {
  font-size: 12px;
  color: #888;
  margin-top: 5px;
}

.upload-progress {
  margin: 15px 0;
}

.progress-bar {
  width: 100%;
  height: 20px;
  background-color: #f0f0f0;
  border-radius: 10px;
  overflow: hidden;
}

.progress-fill {
  width: 0%;
  height: 100%;
  background-color: #4caf50;
  transition: width 0.3s;
}

.progress-text {
  display: block;
  text-align: center;
  margin-top: 5px;
  color: #666;
}

.upload-status {
  margin-top: 10px;
  text-align: center;
  color: #666;
}

.upload-status.success {
  color: #4caf50;
}

.upload-status.error {
  color: #f44336;
}