/* 全局样式 */
* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, "Noto Sans SC", sans-serif; background: #f7faf9; color: #263238; }

/* 头部 */
.header { background: #e6f3f2; padding: 16px 0; text-align: center; }
.header h1 { margin: 0; font-size: 22px; font-weight: 700; }
.subtitle { margin: 6px 0 0; color: #5c6b70; font-size: 13px; }
#last-update { margin-top: 6px; color: #819097; font-size: 12px; }

/* 主体布局 */
.main-grid {
  max-width: 1200px;
  margin: 18px auto;
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 20px;
  padding: 0 12px;
}

/* 卡片和面板 */
.card {
  background: #fff;
  border-radius: 14px;
  padding: 18px 20px;
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.06);
}
.panel h2 {
  margin: 0 0 12px;
  font-size: 18px;
  border-left: 4px solid #1aa6a0;
  padding-left: 8px;
}

/* 字段区域 */
.field {
  margin-bottom: 14px;
}
.field label {
  display: block;
  margin-bottom: 6px;
  color: #314247;
  font-weight: 600;
}

/* 输入布局 */
.input-row {
  display: flex;
  gap: 10px;
  align-items: center;
}
.input-row input[type=range] {
  flex: 1;
}
.input-row input[type=number] {
  width: 90px;
  padding: 6px 8px;
  border: 1px solid #d9e1e0;
  border-radius: 8px;
}

/* 下拉框 */
select {
  width: 100%;
  padding: 8px;
  border: 1px solid #d9e1e0;
  border-radius: 8px;
  background: #fff;
}

/* KPI网格 */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 12px;
}
.kpi {
  background: #eef9f8;
  border-radius: 10px;
  padding: 12px;
  text-align: center;
}
.kpi-title {
  font-size: 12px;
  color: #5c6b70;
  margin-bottom: 4px;
}
.kpi-value {
  font-size: 20px;
  color: #0f7469;
  font-weight: 700;
}

/* 建议提示 */
.suggestion {
  margin: 10px 0 4px;
  background: #dff4eb;
  border: 1px solid #b6e3d0;
  color: #0e7b63;
  border-radius: 10px;
  padding: 10px 12px;
  font-weight: 700;
  text-align: center;
}

/* 成本明细 */
.cost-details-card {
  background: #f9fefc;
  border-radius: 12px;
  padding: 14px;
  margin-top: 10px;
  border: 1px solid #e8f2ef;
}
.cost-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 6px;
  border-bottom: 1px solid #eef2f0;
}
.cost-row:last-child {
  border-bottom: none;
}

/* 章节标题 */
.section-title {
  margin: 22px 0 8px;
  font-size: 16px;
  color: #1b5250;
}

.cif-summary {
  background: #ecfbf0;
  border-radius: 8px;
}
.final-cost {
  background: #4e879c;
  color: #fff;
  border-radius: 10px;
  margin-top: 10px;
  font-size: 18px;
  font-weight: 800;
}

/* 响应式 */
@media (max-width: 1024px) {
  .main-grid {
    grid-template-columns: 1fr;
  }
}