* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  min-height: 100vh;
  padding: 20px;
}

.container {
  max-width: 500px;
  margin: 0 auto;
}

.form-wrapper, .success-wrapper {
  background: white;
  border-radius: 16px;
  padding: 30px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.title {
  text-align: center;
  color: #333;
  margin-bottom: 30px;
  font-size: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  color: #555;
  font-weight: 500;
}

.form-group label .required {
  color: #f56c6c;
  margin-left: 4px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid #dcdfe6;
  border-radius: 8px;
  font-size: 14px;
  transition: all 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #667eea;
  box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.amount-display {
  text-align: center;
  font-size: 20px;
  color: #667eea;
  font-weight: bold;
  margin: 30px 0;
  padding: 15px;
  background: #f5f7fa;
  border-radius: 8px;
}

.submit-btn, .pay-btn {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  border-radius: 8px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: transform 0.2s;
}

.submit-btn:hover, .pay-btn:hover {
  transform: translateY(-2px);
}

.submit-btn:active, .pay-btn:active {
  transform: translateY(0);
}

.success-wrapper {
  text-align: center;
}

.success-icon {
  width: 80px;
  height: 80px;
  background: #67c23a;
  color: white;
  font-size: 50px;
  line-height: 80px;
  border-radius: 50%;
  margin: 0 auto 20px;
}

.success-wrapper h2 {
  color: #333;
  margin-bottom: 20px;
}

.success-wrapper p {
  color: #666;
  margin-bottom: 10px;
  font-size: 14px;
}

.pay-btn {
  margin-top: 30px;
}

.loading {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.loading p {
  color: white;
  margin-top: 20px;
  font-size: 16px;
}

.error-message {
  color: #f56c6c;
  font-size: 12px;
  margin-top: 5px;
}