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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
  background: #f0f2f5;
  color: #333;
  line-height: 1.6;
  min-height: 100vh;
}

/* 导航栏 */
.nav-bar {
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  color: #fff;
  display: flex;
  align-items: center;
  padding: 0 24px;
  height: 56px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 8px rgba(0,0,0,0.15);
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.5px;
}
.nav-logo-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(255,255,255,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

/* 容器 */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

/* 卡片 */
.card {
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  padding: 24px 28px;
  margin-bottom: 20px;
  border: 1px solid #eee;
}

.card-title {
  font-size: 16px;
  font-weight: 600;
  color: #1a1a2e;
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid #f0f0f0;
  display: flex;
  align-items: center;
  gap: 8px;
}
.card-title .icon { font-size: 18px; }

/* 表单 */
.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 24px;
}
.form-grid.col-3 { grid-template-columns: 1fr 1fr 1fr; }
.form-grid.col-1 { grid-template-columns: 1fr; }

.form-group { display: flex; flex-direction: column; }
.form-group label {
  font-size: 13px;
  font-weight: 500;
  color: #555;
  margin-bottom: 4px;
}
.form-group label .unit {
  font-weight: 400;
  color: #999;
  font-size: 12px;
}
.form-group input,
.form-group select,
.form-group textarea {
  height: 38px;
  padding: 0 12px;
  border: 1px solid #d9d9d9;
  border-radius: 6px;
  font-size: 14px;
  color: #333;
  background: #fafafa;
  transition: border-color 0.2s, box-shadow 0.2s;
  font-family: inherit;
}
.form-group textarea {
  height: 70px;
  padding: 10px 12px;
  resize: vertical;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: #4a90d9;
  box-shadow: 0 0 0 2px rgba(74,144,217,0.12);
  background: #fff;
}
.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover {
  border-color: #b3b3b3;
}

/* 上传区域 */
.upload-zone {
  border: 2px dashed #d0d5dd;
  border-radius: 10px;
  padding: 32px;
  text-align: center;
  cursor: pointer;
  transition: all 0.25s;
  background: #fafbfc;
}
.upload-zone:hover {
  border-color: #4a90d9;
  background: #f0f5fb;
}
.upload-zone.has-image {
  border-style: solid;
  border-color: #52c41a;
  background: #f6ffed;
}
.upload-zone .upload-icon { font-size: 40px; margin-bottom: 10px; }
.upload-zone .upload-text { font-size: 14px; color: #666; }
.upload-zone .upload-hint { font-size: 12px; color: #aaa; margin-top: 6px; }
.upload-zone input[type="file"] { display: none; }

.upload-preview { margin-top: 12px; text-align: center; }
.upload-preview img {
  max-width: 100%;
  max-height: 300px;
  border-radius: 8px;
  border: 1px solid #e8e8e8;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.upload-thumbnails {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 12px;
  justify-content: center;
}
.upload-thumbnail {
  position: relative;
  width: 130px;
  height: 100px;
  border-radius: 8px;
  overflow: hidden;
  border: 2px solid #e8e8e8;
  box-shadow: 0 2px 6px rgba(0,0,0,0.06);
  transition: border-color 0.2s;
}
.upload-thumbnail:hover { border-color: #4a90d9; }
.upload-thumbnail img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.upload-thumbnail .thumb-remove {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 22px;
  height: 22px;
  background: rgba(0,0,0,0.55);
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 14px;
  line-height: 22px;
  text-align: center;
  cursor: pointer;
  opacity: 0;
  transition: opacity 0.2s;
}
.upload-thumbnail:hover .thumb-remove { opacity: 1; }
.upload-thumbnail .thumb-index {
  position: absolute;
  bottom: 4px;
  left: 4px;
  background: rgba(74,144,217,0.85);
  color: #fff;
  font-size: 11px;
  padding: 1px 7px;
  border-radius: 10px;
}

.upload-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 12px;
  flex-wrap: wrap;
}

/* 状态栏 */
.status-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  background: #fafafa;
  border-radius: 6px;
  margin-top: 12px;
  font-size: 13px;
  color: #666;
}
.status-bar.success { background: #f6ffed; color: #389e0d; }
.status-bar.error { background: #fff2f0; color: #cf1322; }
.status-bar.loading { background: #e6f7ff; color: #096dd9; }
.status-bar .spinner {
  width: 16px; height: 16px;
  border: 2px solid #d9d9d9;
  border-top-color: #4a90d9;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 20px;
  border: none;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s;
  font-family: inherit;
  white-space: nowrap;
}
.btn-primary { background: #4a90d9; color: #fff; }
.btn-primary:hover { background: #3a7bc8; }
.btn-primary:active { background: #2e6ab5; }

.btn-success { background: #52c41a; color: #fff; }
.btn-success:hover { background: #45b015; }

.btn-outline { background: #fff; color: #4a90d9; border: 1px solid #4a90d9; }
.btn-outline:hover { background: #f0f5fb; }

.btn-danger { background: #ff4d4f; color: #fff; }
.btn-danger:hover { background: #d9363e; }

.btn-ghost { background: transparent; border: none; cursor: pointer; font-family: inherit; }

.btn-sm { padding: 5px 14px; font-size: 12px; }
.btn-lg { padding: 10px 28px; font-size: 15px; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-row { display: flex; gap: 10px; flex-wrap: wrap; }

/* 分隔线 */
.section-divider { border: none; border-top: 1px solid #f0f0f0; margin: 16px 0; }
.sub-section-title { font-size: 14px; font-weight: 600; color: #444; margin: 12px 0 10px; }

/* API 设置 */
.api-settings-toggle {
  font-size: 13px;
  color: #4a90d9;
  cursor: pointer;
  user-select: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-bottom: 8px;
}
.api-settings-toggle:hover { color: #3a7bc8; }

.api-settings {
  display: none;
  background: #fafbfc;
  border: 1px solid #eee;
  border-radius: 8px;
  padding: 16px;
  margin-bottom: 12px;
}
.api-settings.show { display: block; }

/* 复选框 */
.checkbox-group { display: flex; flex-wrap: wrap; gap: 12px 24px; }
.checkbox-item { display: flex; align-items: flex-start; gap: 6px; font-size: 13px; color: #555; }
.checkbox-item input[type="checkbox"] { margin-top: 3px; accent-color: #4a90d9; }
.checkbox-item .case-detail { margin-left: 8px; width: 200px; height: 28px; font-size: 12px; }

/* 预览框 */
.preview-box {
  background: #fafbfc;
  border: 1px solid #e8e8e8;
  border-radius: 8px;
  padding: 20px 24px;
  font-size: 14px;
  line-height: 1.9;
  color: #333;
  white-space: pre-wrap;
  min-height: 200px;
  max-height: 600px;
  overflow-y: auto;
}
.preview-box .highlight { color: #4a90d9; font-weight: 500; }

/* 利润标签 */
.profit-badge {
  display: inline-flex;
  align-items: center;
  height: 38px;
  padding: 0 14px;
  border-radius: 6px;
  font-size: 14px;
  font-weight: 600;
  background: #f0f5fb;
  border: 1px solid #d0dde8;
}
.profit-badge.positive { background: #f6ffed; border-color: #b7eb8f; color: #389e0d; }
.profit-badge.negative { background: #fff2f0; border-color: #ffccc7; color: #cf1322; }
.profit-badge.mixed { background: #fffbe6; border-color: #ffe58f; color: #d48806; }

.clipboard-tip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  color: #999;
  margin-left: 4px;
}

/* Toast */
.toast {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  padding: 10px 24px;
  border-radius: 6px;
  font-size: 14px;
  color: #fff;
  z-index: 9999;
  opacity: 0;
  transition: opacity 0.3s;
  pointer-events: none;
}
.toast.show { opacity: 1; }
.toast.success { background: #52c41a; }
.toast.error { background: #ff4d4f; }
.toast.info { background: #4a90d9; }

/* 历史列表 */
.history-list { list-style: none; }
.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border: 1px solid #eee;
  border-radius: 8px;
  margin-bottom: 8px;
  cursor: pointer;
  transition: all 0.2s;
}
.history-item:hover { border-color: #4a90d9; background: #f0f5fb; }
.history-item .title { font-weight: 500; color: #1a1a2e; }
.history-item .meta { font-size: 12px; color: #999; }
.history-item .actions { display: flex; gap: 6px; }

/* 空状态 */
.empty-state { text-align: center; padding: 40px 20px; color: #999; }

/* 底部 */
.footer-note { text-align: center; font-size: 12px; color: #bbb; margin-top: 12px; }

/* 响应式 */
@media (max-width: 768px) {
  .form-grid { grid-template-columns: 1fr; }
  .form-grid.col-3 { grid-template-columns: 1fr; }
  .container { padding: 16px 12px 40px; }
  .card { padding: 16px 18px; }
}