.side-nav{position:fixed;left:0;top:0;bottom:0;width:220px;background:#1A1A1A;z-index:1000;display:flex;flex-direction:column;justify-content:center;padding:40px 0}
.side-nav>a{display:block;padding:16px 40px;color:rgba(255,255,255,.6);font-size:15px;font-weight:500;transition:all .2s;border-left:3px solid transparent}
.side-nav>a:hover,.side-nav>a.active{color:#fff;border-left-color:#C41E3A;background:rgba(196,30,58,.15)}
.side-brand{padding:16px 40px;font-size:20px;font-weight:800;color:#C41E3A;margin-bottom:20px}
.nav-item-has-dropdown{position:relative}
.nav-item-has-dropdown>a{display:block;padding:16px 40px;color:rgba(255,255,255,.6);font-size:15px;font-weight:500;transition:all .2s;border-left:3px solid transparent}
.nav-item-has-dropdown:hover>a,.nav-item-has-dropdown>a.active{color:#fff;border-left-color:#C41E3A;background:rgba(196,30,58,.15)}
.dropdown-menu{position:absolute;left:100%;top:0;min-width:160px;background:#2A2A2A;border-radius:0 12px 12px 0;box-shadow:4px 4px 20px rgba(0,0,0,.3);opacity:0;visibility:hidden;transform:translateX(-10px);transition:all .3s;padding:12px 0;list-style:none;z-index:1001}
.nav-item-has-dropdown:hover .dropdown-menu{opacity:1;visibility:visible;transform:translateX(0)}
.dropdown-menu li a{display:block;padding:10px 20px;color:rgba(255,255,255,.6);font-size:14px;transition:all .2s}
.dropdown-menu li a:hover{color:#fff;background:rgba(196,30,58,.2)}
.main{margin-left:220px;background:#fff}
.product-hero{min-height:560px;display:grid;grid-template-columns:1.05fr .95fr;background:linear-gradient(135deg,#F8F8F8 0%,#fff 48%,#FFF0F2 100%);border-bottom:1px solid #EEE}
.visual{position:relative;padding:92px 70px 70px;display:flex;align-items:center;justify-content:center;overflow:hidden}
.visual:before{content:"";position:absolute;width:520px;height:520px;border-radius:50%;background:#C41E3A;opacity:.12;left:50%;top:50%;transform:translate(-50%,-50%)}
.visual img{position:relative;z-index:1;width:min(620px,100%);max-height:460px;object-fit:cover;border-radius:28px;box-shadow:0 24px 70px rgba(0,0,0,.14)}
.visual .placeholder{position:relative;z-index:1;width:min(520px,100%);height:360px;border-radius:28px;background:linear-gradient(135deg,#1A1A1A,#C41E3A);display:flex;align-items:center;justify-content:center;color:#fff;font-size:52px;font-weight:900}
.info{padding:120px 80px 80px;display:flex;flex-direction:column;justify-content:center}
.eyebrow{font-size:12px;font-weight:800;letter-spacing:3px;text-transform:uppercase;color:#C41E3A;margin-bottom:16px}
.product-title{font-size:clamp(36px,5vw,68px);line-height:1.08;font-weight:900;color:#1A1A1A;margin:0 0 22px}
.desc{font-size:16px;line-height:1.9;color:#666;max-width:640px;margin-bottom:28px}
.meta-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:0 0 34px;max-width:560px}
.meta-card{background:#fff;border:1px solid #EEE;border-radius:16px;padding:18px 20px;box-shadow:0 8px 24px rgba(0,0,0,.04)}
.meta-label{display:block;font-size:12px;color:#999;margin-bottom:6px}
.meta-value{font-size:18px;font-weight:800;color:#1A1A1A}
.actions{display:flex;gap:14px;flex-wrap:wrap}
.btn-primary,.btn-ghost{display:inline-flex;align-items:center;justify-content:center;padding:14px 28px;border-radius:999px;font-weight:800;font-size:14px;transition:all .25s}
.btn-primary{background:#C41E3A;color:#fff}
.btn-primary:hover{background:#1A1A1A;color:#fff;transform:translateY(-2px)}
.btn-ghost{border:1px solid #DDD;color:#1A1A1A;background:#fff}
.btn-ghost:hover{border-color:#C41E3A;color:#C41E3A}
.content-wrap{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:46px;padding:72px 80px;max-width:1460px;margin:0 auto}
.section-title{font-size:30px;font-weight:900;color:#1A1A1A;margin:0 0 24px}
.content{font-size:16px;line-height:2;color:#333}
.content img{max-width:100%;height:auto;border-radius:16px}
.content p{margin:0 0 18px}
.sidebar{position:sticky;top:32px;height:max-content}
.panel{background:#FAFAFA;border:1px solid #EEE;border-radius:22px;padding:24px;margin-bottom:22px}
.panel h3{font-size:18px;font-weight:900;margin:0 0 18px;color:#1A1A1A}
.related-list{list-style:none;margin:0;padding:0}
.related-list li{display:grid;grid-template-columns:74px 1fr;gap:12px;padding:14px 0;border-top:1px solid #EAEAEA}
.related-list li:first-child{border-top:0;padding-top:0}
.related-list img{width:74px;height:58px;border-radius:10px;object-fit:cover;background:#EEE}
.related-list a{font-size:14px;font-weight:800;color:#333;line-height:1.4}
.related-list a:hover{color:#C41E3A}
.related-list span{display:block;font-size:12px;color:#999;margin-top:5px}
.contact-card{background:#1A1A1A;color:#fff;border-radius:22px;padding:28px}
.contact-card h3{font-size:22px;color:#fff;margin:0 0 12px}
.contact-card p{font-size:14px;line-height:1.7;color:rgba(255,255,255,.68);margin-bottom:18px}
.contact-card a{display:inline-block;background:#C41E3A;color:#fff;border-radius:999px;padding:12px 22px;font-weight:800}
footer{margin-left:220px}
@media(max-width:1100px){
    .product-hero,.content-wrap{grid-template-columns:1fr}
    .visual{padding:90px 28px 30px}
    .info{padding:36px 28px 58px}
}
@media(max-width:1024px){
    .side-nav{display:none}
    .main,footer{margin-left:0}
    .content-wrap{padding:48px 24px}
    .sidebar{position:static}
}
@media(max-width:640px){
    .visual img,.visual .placeholder{height:280px}
    .info{padding:28px 18px 44px}
    .content-wrap{padding:36px 16px}
    .meta-grid{grid-template-columns:1fr}
    .product-title{font-size:32px}
}