/* ============ 报名页面样式 ============ */
* {
  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-bottom: 40px;
}

/* 顶部横幅 */
.header {
  background: linear-gradient(135deg, #1a237e 0%, #283593 50%, #3949ab 100%);
  color: #fff;
  padding: 30px 20px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.header::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: rgba(255,255,255,0.05);
  border-radius: 50%;
}

.header::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 200px;
  height: 200px;
  background: rgba(255,255,255,0.05);
  border-radius: 50%;
}

.header .logo {
  width: 64px;
  height: 64px;
  background: rgba(255,255,255,0.15);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 32px;
  margin-bottom: 12px;
  backdrop-filter: blur(10px);
  border: 2px solid rgba(255,255,255,0.2);
}

.header h1 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 1px;
  margin-bottom: 6px;
  position: relative;
  z-index: 1;
}

.header p {
  font-size: 13px;
  opacity: 0.85;
  position: relative;
  z-index: 1;
}

/* 表单容器 */
.form-container {
  max-width: 600px;
  margin: -20px auto 0;
  padding: 0 16px;
  position: relative;
  z-index: 2;
}

.form-card {
  background: #fff;
  border-radius: 16px;
  padding: 24px 20px;
  box-shadow: 0 8px 32px rgba(0,0,0,0.12);
  margin-bottom: 16px;
}

.form-card .card-title {
  font-size: 16px;
  font-weight: 700;
  color: #1a237e;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.form-card .card-title .icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: linear-gradient(135deg, #667eea, #764ba2);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 14px;
}

/* 步骤指示器 */
.steps {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.step-dot {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #e0e0e0;
  color: #999;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  transition: all 0.3s;
}

.step-dot.active {
  background: linear-gradient(135deg, #667eea, #764ba2);
  color: #fff;
  transform: scale(1.1);
}

.step-line {
  width: 40px;
  height: 2px;
  background: #e0e0e0;
  margin-top: 17px;
  transition: all 0.3s;
}

.step-line.active {
  background: linear-gradient(90deg, #667eea, #764ba2);
}

/* 表单元素 */
.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: #333;
  margin-bottom: 6px;
}

.form-group label .required {
  color: #e53935;
  margin-left: 2px;
}

.form-control {
  width: 100%;
  padding: 11px 14px;
  border: 2px solid #e0e0e0;
  border-radius: 10px;
  font-size: 15px;
  color: #333;
  transition: all 0.2s;
  background: #fafafa;
  outline: none;
  -webkit-appearance: none;
}

.form-control:focus {
  border-color: #667eea;
  background: #fff;
  box-shadow: 0 0 0 3px rgba(102,126,234,0.1);
}

.form-control:disabled {
  background: #f0f0f0;
  color: #666;
}

select.form-control {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='%23999'%3E%3Cpath d='M7 10l5 5 5-5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 10px center;
  background-size: 20px;
  padding-right: 36px;
}

textarea.form-control {
  resize: vertical;
  min-height: 70px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

/* 文件上传区域 */
.upload-group {
  margin-bottom: 18px;
}

.upload-group .upload-label {
  font-size: 14px;
  font-weight: 600;
  color: #333;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.upload-group .upload-label .required {
  color: #e53935;
}

.upload-area {
  border: 2px dashed #ccc;
  border-radius: 12px;
  padding: 20px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s;
  background: #fafafa;
  position: relative;
  overflow: hidden;
}

.upload-area:hover {
  border-color: #667eea;
  background: #f5f7ff;
}

.upload-area.has-file {
  border-style: solid;
  border-color: #4caf50;
  background: #f1f8e9;
}

.upload-area .upload-icon {
  font-size: 32px;
  color: #999;
  margin-bottom: 6px;
}

.upload-area .upload-text {
  font-size: 13px;
  color: #666;
}

.upload-area .upload-hint {
  font-size: 11px;
  color: #aaa;
  margin-top: 4px;
}

.upload-preview {
  width: 100%;
  max-height: 200px;
  object-fit: contain;
  border-radius: 8px;
  margin-top: 8px;
  display: none;
}

.upload-preview.show {
  display: block;
}

.upload-area .file-name {
  font-size: 12px;
  color: #4caf50;
  margin-top: 4px;
  word-break: break-all;
}

/* 按钮 */
.btn {
  display: block;
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s;
  letter-spacing: 2px;
}

.btn-primary {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  box-shadow: 0 4px 15px rgba(102,126,234,0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102,126,234,0.4);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-primary:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: #f5f5f5;
  color: #666;
  border: 2px solid #e0e0e0;
}

.btn-secondary:hover {
  background: #eee;
}

/* 提示信息 */
.alert {
  padding: 12px 16px;
  border-radius: 10px;
  font-size: 14px;
  margin-bottom: 16px;
  display: none;
}

.alert.show {
  display: block;
}

.alert-error {
  background: #ffebee;
  color: #c62828;
  border: 1px solid #ef9a9a;
}

.alert-success {
  background: #e8f5e9;
  color: #2e7d32;
  border: 1px solid #a5d6a7;
}

/* 底部信息 */
.footer-info {
  text-align: center;
  color: rgba(255,255,255,0.7);
  font-size: 12px;
  padding: 20px;
  line-height: 1.8;
}

/* Loading 遮罩 */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}

.loading-overlay.show {
  display: flex;
}

.loading-box {
  background: #fff;
  border-radius: 16px;
  padding: 30px 40px;
  text-align: center;
}

.loading-spinner {
  width: 48px;
  height: 48px;
  border: 4px solid #e0e0e0;
  border-top-color: #667eea;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin: 0 auto 12px;
}

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

.loading-text {
  font-size: 14px;
  color: #666;
}

/* 响应式 */
@media (max-width: 480px) {
  .form-row {
    grid-template-columns: 1fr;
  }

  .header h1 {
    font-size: 18px;
  }

  .form-card {
    padding: 20px 16px;
  }
}