:root{
  --bg:#ffffff;
  --text:#111;
  --muted:#555;
  --brand:#c30d23;
  --brand-soft:#fff5f6;
  --radius:16px;
}

*{box-sizing:border-box;}

html, body{
  margin:0;
  padding:0;
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;

  /* 与原 ZLIP 子页保持一致：由父页面控制整体滚动 */
  overflow-y:hidden;
  overflow-x:hidden;
}

/* 卡片容器 */
.product-hero,
.product-card{
  max-width:1200px;
  margin:20px auto;
  padding:20px;
  border-radius:var(--radius);
  background:#fff;
  border:1px solid rgba(0,0,0,.08);
  box-shadow:0 10px 25px rgba(0,0,0,.06);
}

/* Hero */
.product-hero{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
  align-items:center;
}

.product-hero__image{
  min-height:320px;
  border-radius:12px;
  overflow:hidden;
  border:1px solid rgba(0,0,0,.06);
  background:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
}

.product-hero__image img{
  width:100%;
  max-height:520px;
  display:block;
  object-fit:contain;
}

.product-eyebrow{
  display:inline-block;
  margin-bottom:8px;
  color:var(--brand);
  font-size:13px;
  font-weight:700;
  letter-spacing:.08em;
}

.product-hero__details h1{
  margin:0 0 12px;
  font-size:clamp(24px, 2.6vw, 36px);
  line-height:1.2;
}

.product-description{
  color:var(--muted);
  line-height:1.8;
}

.product-description p{margin:0 0 10px;}

.hero-highlights{
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:10px;
  margin-top:18px;
}

.hero-highlight{
  padding:12px 14px;
  border:1px solid rgba(195,13,35,.14);
  border-radius:12px;
  background:var(--brand-soft);
}

.hero-highlight strong{
  display:block;
  color:var(--brand);
  font-size:19px;
  line-height:1.2;
}

.hero-highlight span{
  display:block;
  margin-top:5px;
  color:var(--muted);
  font-size:12px;
}

/* 标题 */
.product-card h2{
  margin:0 0 14px;
  font-size:20px;
}

.product-card h3{
  margin:0;
}

.note{
  margin:10px 0 0;
  color:var(--muted);
  font-size:13px;
}

/* 列表 */
.bullets{
  list-style:none;
  padding:0;
  margin:0;
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:10px 14px;
}

.bullets li{
  background:#fafafa;
  padding:10px 12px 10px 36px;
  border-radius:12px;
  position:relative;
  border:1px solid rgba(0,0,0,.06);
  line-height:1.6;
  transition:transform .12s ease, box-shadow .12s ease, border-color .12s ease;
}

.bullets li:hover{
  transform:translateY(-1px);
  box-shadow:0 8px 20px rgba(0,0,0,.06);
  border-color:rgba(0,0,0,.10);
}

.bullets--check li::before{
  content:"✓";
  position:absolute;
  left:12px;
  top:10px;
  color:var(--brand);
  font-weight:800;
}

.bullets--dot li::before{
  content:"";
  position:absolute;
  left:14px;
  top:19px;
  width:6px;
  height:6px;
  background:var(--brand);
  border-radius:50%;
}

/* 型号卡片 */
.model-grid{
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:12px;
}

.model-card{
  padding:16px;
  border:1px solid rgba(0,0,0,.08);
  border-radius:12px;
  background:#fafafa;
}

.model-card h3{
  color:var(--brand);
  font-size:17px;
}

.model-card p{
  margin:8px 0 5px;
  font-size:16px;
  font-weight:700;
}

.model-card span{
  color:var(--muted);
  font-size:13px;
}

.model-card--featured{
  background:var(--brand-soft);
  border-color:rgba(195,13,35,.25);
}

/* 表格容器 */
.table-wrap{
  overflow-x:auto;
  border:1px solid rgba(0,0,0,.08);
  border-radius:12px;
  background:#fff;
}

/* 通用表格 */
.spec-table{
  width:100%;
  min-width:760px;
  border-collapse:collapse;
}

.spec-table th,
.spec-table td{
  padding:12px;
  border-bottom:1px solid rgba(0,0,0,.08);
  text-align:center;
  vertical-align:middle;
  line-height:1.55;
}

.spec-table thead th{
  background:var(--brand);
  color:#fff;
  position:sticky;
  top:0;
  z-index:1;
}

.spec-table thead th small{
  display:inline-block;
  margin-top:3px;
  font-size:11px;
  font-weight:500;
  opacity:.9;
}

.spec-table tbody tr:nth-child(even){
  background:rgba(0,0,0,.02);
}

.spec-table tbody td:first-child{
  font-weight:600;
  white-space:nowrap;
}

.spec-table--models{
  min-width:1180px;
}

.spec-table--models th,
.spec-table--models td{
  padding:10px 9px;
  font-size:13px;
}

.spec-table--narrow{
  min-width:500px;
}

/* 功能卡片 */
.feature-grid{
  display:grid;
  grid-template-columns:repeat(3, minmax(0, 1fr));
  gap:12px;
}

.feature-item{
  padding:16px;
  border:1px solid rgba(0,0,0,.07);
  border-radius:12px;
  background:#fafafa;
}

.feature-item h3{
  margin-bottom:7px;
  color:var(--brand);
  font-size:16px;
}

.feature-item p{
  margin:0;
  color:var(--muted);
  font-size:14px;
  line-height:1.7;
}

/* 双表格 */
.dual-table-grid{
  display:grid;
  grid-template-columns:repeat(2, minmax(0, 1fr));
  gap:14px;
}

/* 使用提示 */
.product-card--notice{
  border-color:rgba(195,13,35,.16);
  background:linear-gradient(180deg, #fff 0%, #fffafb 100%);
}

.tips-list{
  margin:0;
  padding-left:22px;
  color:var(--muted);
  line-height:1.8;
}

.tips-list li + li{margin-top:5px;}

/* 下载区域 */
.download-desc{
  color:var(--muted);
  font-size:14px;
  margin:0 0 14px;
}

.btn-download{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:10px 18px;
  border-radius:10px;
  background:var(--brand);
  color:#fff;
  text-decoration:none;
  font-size:14px;
  font-weight:600;
  transition:.15s ease;
}

.btn-download:hover{opacity:.92;}

/* 响应式 */
@media(max-width:900px){
  .product-hero{grid-template-columns:1fr;}
  .bullets{grid-template-columns:1fr;}
  .model-grid{grid-template-columns:repeat(2, minmax(0, 1fr));}
  .feature-grid{grid-template-columns:repeat(2, minmax(0, 1fr));}
  .dual-table-grid{grid-template-columns:1fr;}
}

@media(max-width:560px){
  .product-hero,
  .product-card{
    margin:12px auto;
    padding:14px;
    border-radius:12px;
  }

  .product-hero__image{min-height:220px;}
  .hero-highlights{grid-template-columns:1fr 1fr;}
  .model-grid{grid-template-columns:1fr;}
  .feature-grid{grid-template-columns:1fr;}
}