:root{
    --detail-ink:#17232c;
    --detail-muted:#60727d;
    --detail-blue:#2d81bd;
    --detail-teal:#2f7f95;
    --detail-pink:#d86f93;
    --detail-soft:#f5f9fb;
    --detail-line:#dfeaf0;
    --detail-white:#fff;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{margin:0;background:var(--detail-white);color:var(--detail-ink);font-family:"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.75;}
a{color:inherit;text-decoration:none;}
img{max-width:100%;}

.site-header{
    position:fixed;
    inset:0 0 auto;
    z-index:100;
    height:80px;
    padding:0 5%;
    display:flex;
    align-items:center;
    justify-content:space-between;
    background:#fff;
    box-shadow:0 2px 12px rgba(31,67,92,.08);
}
.brand img{display:block;width:auto;height:54px;}
.site-nav{display:flex;align-items:center;gap:34px;height:100%;}
.nav-item{position:relative;display:flex;align-items:center;height:100%;}
.nav-item>a{display:flex;align-items:center;height:100%;font-size:15px;white-space:nowrap;color:#263943;}
.nav-item.active>a,.nav-item>a:hover{color:var(--detail-blue);font-weight:600;}
.submenu{
    position:absolute;
    top:76px;
    left:50%;
    min-width:156px;
    padding:8px;
    display:flex;
    flex-direction:column;
    gap:4px;
    background:#fff;
    border:1px solid var(--detail-line);
    border-radius:6px;
    box-shadow:0 16px 36px rgba(31,67,92,.12);
    opacity:0;
    visibility:hidden;
    pointer-events:none;
    transform:translate(-50%,8px);
    transition:.2s ease;
}
.submenu a{padding:9px 14px;border-radius:4px;font-size:14px;text-align:center;white-space:nowrap;color:#526772;}
.submenu a:hover{color:#fff;background:var(--detail-blue);}
.nav-item:hover .submenu,.nav-item:focus-within .submenu{opacity:1;visibility:visible;pointer-events:auto;transform:translate(-50%,0);}
.mobile-menu-toggle{display:none;width:42px;height:42px;border:1px solid var(--detail-line);border-radius:6px;background:#fff;align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer;}
.mobile-menu-toggle span{width:20px;height:2px;background:var(--detail-blue);transition:.2s ease;}

.detail-main{padding-top:80px;}
.breadcrumb{max-width:1200px;margin:0 auto;padding:22px 5% 0;color:#71838d;font-size:14px;}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;list-style:none;}
.breadcrumb li+li::before{content:"/";margin-right:8px;color:#9aabb3;}
.breadcrumb a:hover{color:var(--detail-blue);}

.detail-image-page{background:#f5f8fa;}
.detail-image-heading{max-width:790px;margin:0 auto;padding:28px 18px 24px;display:flex;align-items:end;justify-content:space-between;gap:24px;}
.detail-image-heading h1{margin:0;font-size:30px;line-height:1.35;font-weight:600;letter-spacing:0;}
.detail-back-link{flex:0 0 auto;color:var(--detail-blue);font-size:15px;font-weight:600;}
.detail-back-link:hover{text-decoration:underline;}
.product-long-image{width:min(790px,100%);margin:0 auto;padding:0;overflow:visible;background:#fff;line-height:0;}
.product-long-image img{display:block;width:100%;height:auto!important;max-height:none!important;margin:0;padding:0;border:0;object-fit:contain!important;}
.product-shop-cta{max-width:790px;margin:30px auto 64px;padding:26px 28px;display:flex;align-items:center;justify-content:space-between;gap:24px;background:#fff;border:1px solid var(--detail-line);border-radius:8px;box-shadow:0 12px 30px rgba(31,67,92,.08);}
.product-shop-cta p{margin:0;color:var(--detail-muted);font-size:15px;}
.shop-1688-button{min-height:46px;padding:10px 22px;display:inline-flex;align-items:center;justify-content:center;flex:0 0 auto;border:1px solid #ff6000;border-radius:6px;background:#ff6000;color:#fff;font-size:15px;font-weight:600;transition:.2s ease;}
.shop-1688-button:hover{background:#e95600;border-color:#e95600;box-shadow:0 8px 18px rgba(255,96,0,.2);}

.product-hero{max-width:1200px;margin:0 auto;padding:34px 5% 64px;display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:64px;align-items:center;}
.product-media{position:relative;min-width:0;aspect-ratio:1/1;display:grid;place-items:center;overflow:hidden;background:var(--detail-soft);border:1px solid var(--detail-line);border-radius:8px;}
.product-media img{width:100%;height:100%;object-fit:contain;padding:7%;}
.product-media-badge{position:absolute;top:18px;left:18px;padding:7px 12px;border-radius:999px;background:#fff;border:1px solid var(--detail-line);color:var(--detail-teal);font-size:13px;font-weight:600;}
.product-kicker{margin:0 0 10px;color:var(--detail-blue);font-size:13px;font-weight:700;letter-spacing:0;text-transform:uppercase;}
.product-copy h1{margin:0;color:var(--detail-ink);font-size:clamp(32px,4vw,50px);line-height:1.2;font-weight:600;letter-spacing:0;}
.product-lead{margin:22px 0 0;color:var(--detail-muted);font-size:17px;line-height:1.9;}
.product-tags{display:flex;flex-wrap:wrap;gap:10px;margin:26px 0 0;padding:0;list-style:none;}
.product-tags li{padding:7px 13px;border:1px solid var(--detail-line);border-radius:999px;background:#fff;color:#526b78;font-size:14px;}
.product-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px;}
.detail-button{min-height:46px;padding:10px 20px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--detail-blue);border-radius:6px;background:var(--detail-blue);color:#fff;font-size:15px;font-weight:600;transition:.2s ease;}
.detail-button:hover{background:#236e9f;border-color:#236e9f;}
.detail-button.secondary{background:#fff;color:var(--detail-blue);}
.detail-button.secondary:hover{background:#eef6fa;}
.detail-button[aria-disabled="true"]{color:#81909a;background:#eef2f4;border-color:#d9e2e7;cursor:not-allowed;}

.detail-band{background:var(--detail-soft);border-top:1px solid var(--detail-line);border-bottom:1px solid var(--detail-line);}
.detail-section{max-width:1200px;margin:0 auto;padding:64px 5%;}
.section-head{display:grid;grid-template-columns:minmax(0,.7fr) minmax(300px,.8fr);gap:40px;align-items:end;margin-bottom:30px;}
.section-eyebrow{margin:0 0 8px;color:var(--detail-blue);font-size:13px;font-weight:700;}
.section-head h2{margin:0;font-size:clamp(27px,3vw,38px);line-height:1.3;font-weight:600;letter-spacing:0;}
.section-head>p{margin:0;color:var(--detail-muted);font-size:15px;}
.feature-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;}
.feature-item{min-height:170px;padding:24px;background:#fff;border:1px solid var(--detail-line);border-radius:8px;}
.feature-index{display:block;margin-bottom:22px;color:var(--detail-pink);font-size:13px;font-weight:700;}
.feature-item h3{margin:0 0 8px;font-size:19px;font-weight:600;}
.feature-item p{margin:0;color:var(--detail-muted);font-size:14px;line-height:1.75;}

.spec-layout{display:grid;grid-template-columns:minmax(0,.86fr) minmax(0,1.14fr);gap:38px;align-items:start;}
.spec-intro h2{margin:0 0 14px;font-size:clamp(27px,3vw,38px);line-height:1.3;font-weight:600;}
.spec-intro p{margin:0;color:var(--detail-muted);}
.spec-list{margin:0;border-top:1px solid var(--detail-line);}
.spec-row{display:grid;grid-template-columns:140px 1fr;gap:24px;padding:17px 0;border-bottom:1px solid var(--detail-line);}
.spec-row dt{font-weight:600;color:#304550;}
.spec-row dd{margin:0;color:var(--detail-muted);}

.scenario-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;}
.scenario-item{padding:26px;background:#fff;border:1px solid var(--detail-line);border-radius:8px;}
.scenario-item h3{margin:0 0 8px;font-size:19px;font-weight:600;}
.scenario-item p{margin:0;color:var(--detail-muted);font-size:14px;}

.notice{display:grid;grid-template-columns:minmax(0,.78fr) minmax(300px,1.22fr);gap:44px;align-items:start;}
.notice h2{margin:0;font-size:clamp(27px,3vw,38px);line-height:1.3;font-weight:600;}
.notice-list{margin:0;padding-left:22px;color:var(--detail-muted);}
.notice-list li+li{margin-top:12px;}

.detail-cta{max-width:1080px;margin:0 auto 72px;padding:34px 38px;display:flex;align-items:center;justify-content:space-between;gap:28px;background:#f7fbfd;border:1px solid var(--detail-line);border-radius:8px;}
.detail-cta h2{margin:0 0 6px;font-size:24px;font-weight:600;}
.detail-cta p{margin:0;color:var(--detail-muted);}

.footer-nav-wrap{background:#222;padding:56px 5% 0;color:#aaa;}
.footer-nav-container{max-width:1200px;margin:0 auto 36px;display:grid;grid-template-columns:1.35fr repeat(4,1fr);gap:30px;}
.footer-brand img{display:block;width:180px;height:auto;margin-bottom:16px;}
.footer-brand p{margin:0;max-width:280px;font-size:14px;line-height:1.8;}
.footer-nav-column h3{margin:0 0 18px;color:#fff;font-size:17px;font-weight:500;}
.footer-nav-column ul{margin:0;padding:0;list-style:none;}
.footer-nav-column li+li{margin-top:10px;}
.footer-nav-column a{font-size:14px;transition:.2s ease;}
.footer-nav-column a:hover{color:#7fc0e5;}
.site-footer{padding:22px 0 40px;text-align:center;border-top:1px solid #333;font-size:13px;}

@media(max-width:980px){
    .site-nav{gap:18px;}
    .product-hero{gap:38px;}
    .feature-grid{grid-template-columns:repeat(2,minmax(0,1fr));}
    .footer-nav-container{grid-template-columns:repeat(2,1fr);}
    .footer-brand{grid-column:1/-1;}
}

@media(max-width:768px){
    body{padding-top:64px;}
    .site-header{height:64px;padding:0 16px;}
    .brand img{height:42px;}
    .mobile-menu-toggle{display:flex;}
    body.nav-open .mobile-menu-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg);}
    body.nav-open .mobile-menu-toggle span:nth-child(2){opacity:0;}
    body.nav-open .mobile-menu-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
    .site-nav{position:absolute;top:64px;left:0;right:0;height:auto;padding:8px 16px 16px;display:none;align-items:stretch;flex-direction:column;gap:0;background:#fff;border-top:1px solid var(--detail-line);box-shadow:0 14px 28px rgba(31,67,92,.12);}
    body.nav-open .site-nav{display:flex;}
    .nav-item{height:auto;display:block;}
    .nav-item>a{height:auto;padding:12px 4px;border-bottom:1px solid #edf3f6;}
    .submenu{position:static;min-width:0;padding:4px 0 8px 14px;display:none;border:0;box-shadow:none;opacity:1;visibility:visible;pointer-events:auto;transform:none;}
    .nav-item.submenu-open .submenu{display:flex;}
    .submenu a{text-align:left;padding:8px 4px;}
    .detail-main{padding-top:0;}
    .breadcrumb{padding:16px 18px 0;}
    .detail-image-heading{padding:20px 18px;display:block;}
    .detail-image-heading h1{font-size:24px;}
    .detail-back-link{display:inline-block;margin-top:12px;}
    .product-shop-cta{margin:22px 18px 48px;padding:22px;display:block;text-align:center;}
    .shop-1688-button{width:100%;margin-top:16px;}
    .product-hero{padding:22px 18px 46px;grid-template-columns:1fr;gap:28px;}
    .product-media{max-height:430px;}
    .product-copy h1{font-size:32px;}
    .product-lead{font-size:16px;}
    .product-actions{display:grid;grid-template-columns:1fr 1fr;}
    .detail-button{padding-left:12px;padding-right:12px;text-align:center;}
    .detail-section{padding:46px 18px;}
    .section-head,.spec-layout,.notice{grid-template-columns:1fr;gap:18px;}
    .feature-grid,.scenario-grid{grid-template-columns:1fr;}
    .feature-item{min-height:0;}
    .spec-row{grid-template-columns:110px 1fr;gap:14px;}
    .detail-cta{margin:0 18px 52px;padding:26px;display:block;}
    .detail-cta .detail-button{margin-top:18px;width:100%;}
    .footer-nav-wrap{padding:44px 18px 0;}
    .footer-nav-container{grid-template-columns:1fr;text-align:center;}
    .footer-brand{display:flex;flex-direction:column;align-items:center;}
}

@media(max-width:420px){
    .product-actions{grid-template-columns:1fr;}
    .spec-row{grid-template-columns:1fr;gap:4px;}
}