/* ================================
   Product Detail – Anchor Navigation
   ================================ */

.product-anchor {
    position: sticky;
    top: 72px; /* 避开 header */
    z-index: 20;
    background: #fff;
    border-bottom: 1px solid #eaeef3;
    margin: 32px 0 40px;
}

.product-anchor ul {
    display: flex;
    align-items: center;
    gap: 40px;              /* 拉开间距 */
    padding: 12px 0;
    margin: 0;
    list-style: none;
    position: relative;
}

.product-anchor li {
    position: relative;
}

.product-anchor a {
    position: relative;
    font-size: 18px;        /* 字体变大 */
    font-weight: 500;
    color: #6b7280;
    text-decoration: none;
    padding: 8px 4px;
    white-space: nowrap;
    transition: color .25s ease;
    display: block;
}

.product-anchor a:hover {
    color: #2563eb;
}

.product-anchor a.active {
    color: #2563eb;
    font-weight: 600;
}

/* 底部高亮指示条 */
.product-anchor .anchor-indicator {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 2px;
    width: 0;
    background: #2563eb;
    transition: transform .3s ease, width .3s ease;
}

.product-section{
    padding:18px 0;
    margin-bottom:28px;
    border-bottom:1px dashed #d6dee6;
    scroll-margin-top:90px;
}
/* 统一标题样式 */
.section-title {
    font-size: 20px;
    font-weight: 600;
    color: #1f2937;
    border-left: 4px solid #2563eb;
    padding-left: 16px;
    margin-bottom: 24px;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

section[id]::before {
    content: '';
    display: block;
    height: 90px;
    margin-top: -90px;
    visibility: hidden;
}
/* =====================================================
   产品详情锚点结构
===================================================== */

.product-anchor-nav{
    background:#f4f8ff;
    border:1px solid #e9ecef;
    border-radius:10px;
    padding:16px 10px;
    margin-bottom:40px;
}

.product-anchor-nav .nav-link{
    color:#1f2d3d;
    font-size:17px;
    font-weight:500;
    padding:10px 22px;
    border-radius:6px;
    transition:.25s ease;
}

.product-anchor-nav .nav-link:hover{
    background:rgba(13,110,253,.1);
    color:#0d6efd;
}

.product-anchor-nav .nav-link.active{
    background:#0d6efd;
    color:#fff;
}

.section-title{
    position:relative;
    padding-left:16px;
    margin-bottom:16px;
    font-size:24px;
}

.section-title::before{
    content:'';
    position:absolute;
    left:0;
    top:4px;
    width:4px;
    height:22px;
    background:#0d6efd;
}

.section-content{
    font-size:18px;
    line-height:1.9;
}

.table-parameters{
    border:1px solid #cfd8e3;
}

.table-parameters th{
    background:#f4f6f9;
    width:220px;
    font-weight:600;
}

.table-parameters th,
.table-parameters td{
    border:1px solid #cfd8e3;
    padding:12px 16px;
}
/* ===============================
   Mobile Fix
================================ */

@media (max-width:768px){

.product-anchor{
    top:90px;
}

.product-section{
    scroll-margin-top:150px;
}

section[id]::before{
    height:150px;
    margin-top:-150px;
}

}