/* ================= PRODUCT PAGE ================= */

.productwrap{
max-width:1200px;
margin:40px auto;
padding:0 20px;
}

.breadcrumb{
font-size:14px;
margin-bottom:15px;
color:#666;
}

/* 三欄版型 */
.productgrid{
display:grid;
grid-template-columns:240px 1fr 300px;
gap:40px;
}

/* Sidebar */
.sidebar{
background:#f5f7fa;
padding:20px;
border-radius:10px;
}

.sidebar h3{
margin-top:10px;
margin-bottom:5px;
}

.sidebar a{
display:block;
padding:6px 0;
color:#0b66c3;
text-decoration:none;
}

.sidebar a:hover{
text-decoration:underline;
}

/* Product Images */
.productimg img{
width:100%;
border-radius:10px;
box-shadow:0 6px 18px rgba(0,0,0,.1);
}

/* Download Box */
.downloadbox{
background:white;
padding:20px;
border-radius:10px;
box-shadow:0 6px 18px rgba(0,0,0,.1);
}

/* Buttons */
.btn{
display:block;
margin:10px 0;
padding:12px;
background:#1976d2;
color:white;
text-align:center;
border-radius:6px;
text-decoration:none;
font-weight:bold;
}

.btn:hover{
background:#0f5aa5;
}


/* ================= MOBILE ================= */

@media(max-width:900px){

.productgrid{
grid-template-columns:1fr;
}

/* ⭐ 不再隱藏 */
.sidebar{
display:block;
margin-bottom:20px;
}

}

.downloadbox{
position:sticky;
top:120px;
}