/* 全局设计令牌 */
:root {
  --primary: #4F46E5;
  --primary-hover: #4338CA;
  --primary-light: #EEF2FF;
  --secondary: #7C3AED;
  --accent: #10B981;
  --accent-hover: #059669;
  --bg: #F8FAFC;
  --surface: #FFFFFF;
  --text: #0F172A;
  --text-secondary: #64748B;
  --border: #E2E8F0;
  --border-hover: #CBD5E1;
  --danger: #EF4444;
  --danger-bg: #FEF2F2;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
  --shadow-primary: 0 4px 14px rgba(79,70,229,0.25);
  --radius: 8px;
  --radius-lg: 12px;
  --font: 'Plus Jakarta Sans', -apple-system, "Microsoft YaHei", "Segoe UI", sans-serif;
}

/* 全局基础 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 14px; scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

/* 顶部导航栏 */
.navbar {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  padding: 0 2rem;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 100;
}
.navbar h1 {
  font-size: 1.25rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.navbar .nav-badge {
  background: rgba(255,255,255,0.2);
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 500;
}

/* 主容器 */
.main-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem 1rem;
}

/* 卡片组件 */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease;
}
.card:hover { box-shadow: var(--shadow-md); }
.card-header {
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.card-header h2 {
  font-size: 1rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.card-body { padding: 1.25rem; }

/* 项目信息区 */
.project-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.75rem;
}
.form-group label {
  display: block;
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 4px;
}
.form-group input,
.form-group select {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  transition: border-color 0.15s, box-shadow 0.15s;
  background: var(--surface);
  color: var(--text);
}
.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
}

/* 检测对象组 */
.object-groups { display: flex; flex-direction: column; gap: 1rem; }
.object-group {
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color 0.2s;
}
.object-group:hover { border-color: var(--border-hover); }
.group-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  background: var(--primary-light);
  border-bottom: 1px solid var(--border);
  gap: 0.75rem;
}
.group-header input.group-name-input {
  flex: 1;
  border: 1px dashed transparent;
  background: transparent;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 4px 8px;
  border-radius: 4px;
  color: var(--primary);
}
.group-header input.group-name-input:hover {
  border-color: var(--primary);
}
.group-header input.group-name-input:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--surface);
  box-shadow: 0 0 0 2px rgba(79,70,229,0.1);
}
.group-body { padding: 1rem; }

/* 对象类型 & 指标选择器行 */
.selector-row {
  display: grid;
  grid-template-columns: 1fr 1fr auto;
  gap: 0.75rem;
  align-items: end;
  margin-bottom: 0.75rem;
}
.selector-row select {
  width: 100%;
  padding: 8px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.875rem;
}
.selector-row select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,0.1);
}

/* 指标表格 */
.indicator-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.8rem;
}
.indicator-table thead th {
  background: #F1F5F9;
  padding: 8px 12px;
  text-align: left;
  font-weight: 600;
  color: var(--text-secondary);
  border-bottom: 2px solid var(--border);
  white-space: nowrap;
}
.indicator-table tbody td {
  padding: 8px 12px;
  border-bottom: 1px solid var(--border);
  vertical-align: middle;
}
.indicator-table tbody tr:hover { background: #F8FAFC; }
.indicator-table .col-name { min-width: 140px; }
.indicator-table .col-price { width: 90px; text-align: right; }
.indicator-table .col-volume { width: 160px; }
.indicator-table .col-subtotal { width: 90px; text-align: right; font-weight: 600; color: var(--primary); }
.indicator-table .col-cma { width: 60px; text-align: center; }
.indicator-table .col-action { width: 40px; text-align: center; }

/* 业务量输入组 */
.volume-group {
  display: flex;
  align-items: center;
  gap: 2px;
}
.volume-group input {
  width: 40px;
  padding: 4px;
  text-align: center;
  border: 1px solid var(--border);
  border-radius: 4px;
  font-size: 0.8rem;
}
.volume-group input:focus {
  outline: none;
  border-color: var(--primary);
}
.volume-group span {
  color: var(--text-secondary);
  font-size: 0.75rem;
}

/* CMA 徽章 */
.cma-badge {
  display: inline-flex;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.7rem;
  font-weight: 600;
}
.cma-badge.cma-yes { background: #DCFCE7; color: #166534; }
.cma-badge.cma-no { background: #FEF3C7; color: #92400E; }

/* 辅助费用区 */
.extra-fees {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 0.75rem;
}
.fee-item {
  display: flex;
  align-items: center;
  gap: 8px;
}
.fee-item label {
  font-size: 0.8rem;
  color: var(--text-secondary);
  white-space: nowrap;
}
.fee-item input {
  width: 100px;
  padding: 6px 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.85rem;
  text-align: right;
}
.fee-item input:focus {
  outline: none;
  border-color: var(--primary);
}

/* 费用汇总 */
.cost-summary {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
  padding: 1rem;
  background: linear-gradient(135deg, var(--primary-light), #F5F3FF);
  border-radius: var(--radius);
}
.summary-item {
  text-align: center;
}
.summary-item .label {
  font-size: 0.75rem;
  color: var(--text-secondary);
  margin-bottom: 4px;
}
.summary-item .value {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}
.summary-item .value.total {
  font-size: 2rem;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 8px 16px;
  border: none;
  border-radius: var(--radius);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}
.btn:active { transform: scale(0.98); }
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-primary);
}
.btn-primary:hover { background: var(--primary-hover); }
.btn-accent {
  background: var(--accent);
  color: #fff;
}
.btn-accent:hover { background: var(--accent-hover); }
.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-secondary);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}
.btn-danger {
  background: transparent;
  color: var(--danger);
  border: none;
  padding: 4px 8px;
}
.btn-danger:hover { background: var(--danger-bg); }
.btn-sm { padding: 4px 10px; font-size: 0.8rem; }
.btn-lg { padding: 12px 24px; font-size: 1rem; }

/* 操作栏 */
.action-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
  flex-wrap: wrap;
}

/* AI 建议书预览 */
.proposal-container {
  min-height: 200px;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  background: #FAFAFA;
}
.proposal-container.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 1rem;
  color: var(--text-secondary);
}
.proposal-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 200px;
  color: var(--text-secondary);
  gap: 0.5rem;
}
.proposal-placeholder svg { opacity: 0.3; }

/* 加载动画 */
.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--border);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Toast 通知 */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.toast {
  padding: 12px 20px;
  border-radius: var(--radius);
  color: #fff;
  font-size: 0.85rem;
  box-shadow: var(--shadow-lg);
  animation: slideIn 0.3s ease;
  max-width: 360px;
}
.toast.success { background: var(--accent); }
.toast.error { background: var(--danger); }
.toast.info { background: var(--primary); }
@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

/* 区块间距 */
.section-gap { margin-bottom: 1.5rem; }

/* 自适应 */
@media (max-width: 768px) {
  .main-container { padding: 1rem 0.5rem; }
  .selector-row { grid-template-columns: 1fr; }
  .project-info { grid-template-columns: 1fr; }
  .action-bar { flex-direction: column; }
  .cost-summary { grid-template-columns: 1fr 1fr; }
}