.roi-section {
  background: #f8fafc;
  padding: 100px 20px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto;
}

.container {
  max-width: 1100px;
  margin: auto;
}

/* 标题 */
.roi-title {
  text-align: center;
  font-size: 40px;
  font-weight: 800;
  color: #0f172a;
}

.roi-subtitle {
  text-align: center;
  font-size: 18px;
  color: #64748b;
  margin-top: 12px;
  margin-bottom: 50px;
}

/* 表格卡片 */
.roi-table-wrapper {
  background: #fff;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 8px 30px rgba(0,0,0,0.06);
}

/* 表格 */
.roi-table {
  width: 100%;
  border-collapse: collapse;
}

.roi-table th {
  background: #f1f5f9;
  text-align: left;
  padding: 18px 24px;
  font-size: 14px;
  color: #64748b;
  font-weight: 600;
}

.roi-table td {
  padding: 20px 24px;
  border-top: 1px solid #e2e8f0;
  font-size: 16px;
  color: #1e293b;
}

/* 高亮数据 */
.highlight {
  color: #f97316;
  font-weight: 700;
}

/* 引用区 */
.roi-quotes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 50px;
}

/* 引用卡片 */
.quote {
  background: #eef2f7;
  padding: 18px 20px;
  border-radius: 12px;
  font-size: 14px;
  color: #475569;
  position: relative;
}

/* 左侧装饰线 */
.quote::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  bottom: 10px;
  width: 4px;
  background: #56B8B8;
  border-radius: 2px;
}

/* 响应式 */
@media (max-width: 768px) {
  .roi-title {
    font-size: 28px;
  }

  .roi-table th,
  .roi-table td {
    padding: 14px;
    font-size: 14px;
  }

  .roi-quotes {
    grid-template-columns: 1fr;
  }
}