:root {
  --bg-color: #ffffff;
  --fg-color: #111111;
  --primary-color: #c30d23;
  --muted-color: #555555;
  --border-color: #ddd;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-color);
  color: var(--fg-color);
  overflow: hidden; /* 子页不出现滚动条，由父页 iframe 控制 */
  font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
}

/* ============= 产品展示 ============= */
.product-hero{
  max-width: 1200px;
  margin: 0 auto;
  padding: 28px 16px 12px;
  display: grid;
  grid-template-columns: 5fr 7fr;    /* 左图右文：5:7 */
  gap: 24px;
  align-items: center;
}

.product-hero__image{ width: 100%; }
.product-hero__image img{
  display: block;
  width: 100%;
  max-width: 580px;
  height: auto;
  margin: 0 auto;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0,0,0,.1);
  object-fit: contain;
}

.product-hero__details{ min-width: 0; }
.product-hero__details h1{
  margin: 0 0 10px;
  font-weight: 700;
  font-size: clamp(22px, 3.6vw, 36px);
  line-height: 1.15;
}
.product-hero__details .product-description{
  margin: 10px 0 0;
  color: var(--muted-color);
  font-size: clamp(14px, 1.7vw, 18px);
  line-height: 1.7;
}
.product-hero__details .product-description p{ margin: 0 0 10px; }

/* 小屏：单列，上图下文 */
@media (max-width: 960px){
  .product-hero{
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 20px 12px 8px;
  }
  .product-hero__image img{ max-width: 92vw; }
}

/* ============= 参数表 ============= */
.product-specifications{
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px;
}
.product-specifications h2{
  margin: 8px 0 12px;
  font-size: clamp(18px, 2.4vw, 28px);
}

.table-wrap{
  width: 100%;
  overflow-x: auto;            /* 窄屏横向滚动，避免挤压 */
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--border-color);
  border-radius: 10px;
  background: #fff;
}
table{
  width: 100%;
  min-width: 960px;            /* 80xx 列较多，给更大的最小宽 */
  border-collapse: collapse;
}
th, td{
  padding: 12px 10px;
  border-bottom: 1px solid var(--border-color);
  text-align: center;
  white-space: nowrap;
}
thead th{
  position: sticky;
  top: 0;
  background: var(--primary-color);
  color: #fff;
  z-index: 1;
}
tbody tr:nth-child(even){ background: #f9f9f9; }

/* 链接 */
a{ color: var(--primary-color); text-decoration: none; }
a:hover{ text-decoration: underline; }