:root{--brand-navy:#163a5f;--brand-navy-dark:#0f2740;--brand-accent:#1f7a8c;--brand-black:#111111;--brand-dark:#1a1a1a;--text:#222222;--muted:#666666;--border:#e5e5e5;--bg:#ffffff;--bg-soft:#f4f7fa;--accent-green:#1f7a8c;--header-h:56px;--bottom-nav-h:56px;--font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif}*{box-sizing:border-box}body,html{margin:0;padding:0;font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.6}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button,input{font:inherit}.container{width:min(1200px,calc(100% - 32px));margin:0 auto}.topbar{background:#f3f3f3;font-size:13px;color:var(--muted);padding:6px 0}.topbar .container{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}.topbar a{color:var(--brand-dark);font-weight:600}.main-nav{background:var(--brand-navy);border-bottom:1px solid var(--brand-navy-dark);position:-webkit-sticky;position:sticky;top:0;z-index:40}.main-nav .container{display:flex;align-items:center;justify-content:space-between;min-height:var(--header-h);gap:16px}.logo{font-size:20px;font-weight:800;letter-spacing:.02em;color:#fff;white-space:nowrap}.logo span{font-weight:500;font-size:13px;margin-left:8px;opacity:.85}.nav-links{display:flex;gap:4px;flex-wrap:wrap;list-style:none;margin:0;padding:0}.nav-links a{display:block;padding:10px 14px;font-weight:600;color:#fff;border-radius:2px}.nav-links a.active,.nav-links a:hover{background:rgba(255,255,255,.12)}.hero{position:relative;background:linear-gradient(135deg,#0f2740,#163a5f 55%,#1f7a8c 140%);color:#fff;min-height:280px;display:flex;align-items:center;overflow:hidden}.hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 30%,rgba(31,122,140,.35),transparent 42%),radial-gradient(circle at 80% 70%,rgba(255,255,255,.08),transparent 35%)}.hero .container{position:relative;padding:48px 16px}.hero h1{margin:0 0 12px;font-size:clamp(28px,5vw,42px);line-height:1.2}.hero p{margin:0 0 20px;max-width:560px;opacity:.9;font-size:16px}.hero-cta{display:inline-block;background:#fff;color:var(--brand-navy);font-weight:700;padding:10px 20px}.section{padding:48px 0}.section-head{text-align:center;margin-bottom:28px}.section-head h2{margin:0;font-size:28px;font-weight:800}.section-head p{margin:8px 0 0;color:var(--muted)}.section-head .divider{width:48px;height:3px;background:var(--brand-accent);margin:12px auto 0}.bg-soft{background:var(--bg-soft)}.product-grid{display:grid;grid-template-columns:repeat(4,1fr);grid-gap:16px;gap:16px}.product-card{background:#fff;border:1px solid var(--border);transition:box-shadow .2s,transform .2s;overflow:hidden}.product-card:hover{box-shadow:0 8px 24px rgba(0,0,0,.08);transform:translateY(-2px)}.product-card .thumb{aspect-ratio:1;background:#fafafa;display:flex;align-items:center;justify-content:center;padding:12px}.product-card .thumb img{max-height:100%;object-fit:contain}.product-card .thumb.placeholder{color:var(--muted);font-size:14px;text-align:center;padding:20px}.product-card .meta{padding:12px;border-top:1px solid var(--border)}.product-card .meta h3{margin:0;font-size:15px;font-weight:600}.product-card .meta p{margin:6px 0 0;font-size:13px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.about-teaser{display:grid;grid-template-columns:1.2fr 1fr;grid-gap:32px;gap:32px;align-items:center}.about-teaser h2{margin:0 0 12px;font-size:28px}.about-teaser p{margin:0 0 16px;color:var(--muted)}.btn{display:inline-block;background:var(--brand-black);color:#fff;padding:10px 18px;font-weight:600}.about-panel,.btn.yellow{background:var(--brand-navy);color:#fff}.about-panel{padding:28px;min-height:180px}.about-panel h3{margin:0 0 8px}.about-panel ul{margin:0;padding-left:18px}.site-footer{background:#1a1a1a;color:#ddd;padding:40px 0 24px;font-size:14px}.site-footer h4{margin:0 0 12px;color:#8ec8d4}.footer-grid{display:grid;grid-template-columns:1.4fr 1fr;grid-gap:24px;gap:24px;margin-bottom:24px}.site-footer a:hover{color:#8ec8d4}.footer-bottom{border-top:1px solid #333;padding-top:16px;color:#888;font-size:12px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}.category-layout{display:grid;grid-template-columns:220px minmax(0,1fr);grid-gap:0;gap:0;min-height:480px;border:1px solid var(--border);background:#fff;width:100%;overflow:hidden}.cat-sidebar{background:var(--bg-soft);border-right:1px solid var(--border);min-width:0}.cat-sidebar a{display:block;padding:14px 16px;border-left:3px solid transparent;font-size:14px;color:var(--text)}.cat-sidebar a.active{background:#fff;border-left-color:var(--accent-green);font-weight:700;color:var(--accent-green)}.cat-main{padding:16px;min-width:0;overflow:hidden}.search-bar{display:flex;gap:8px;margin-bottom:16px}.search-bar input{flex:1 1;min-width:0;border:1px solid var(--border);border-radius:20px;padding:10px 16px;background:var(--bg-soft)}.subcat-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:12px;gap:12px}.subcat-item{text-align:center;padding:12px 8px;border:1px solid transparent;min-width:0}.subcat-item:hover{border-color:var(--border)}.subcat-item .icon{width:min(96px,100%);aspect-ratio:1;height:auto;margin:0 auto 8px;background:#fafafa;display:flex;align-items:center;justify-content:center;border:1px solid var(--border);overflow:hidden}.subcat-item .icon img{width:80%;height:80%;object-fit:contain}.subcat-item .label{font-size:13px;line-height:1.3;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.page-banner{background:var(--bg-soft);border-bottom:1px solid var(--border);padding:20px 0}.page-banner h1{margin:0;font-size:24px}.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:8px}.breadcrumb a:hover{color:var(--accent-green)}.detail-layout{display:grid;grid-template-columns:1fr 1.2fr;grid-gap:32px;gap:32px;margin-bottom:32px}.detail-gallery{border:1px solid var(--border);background:#fafafa;aspect-ratio:1;display:flex;align-items:center;justify-content:center;padding:20px}.detail-gallery img{max-height:100%;object-fit:contain}.product-specs{margin:12px 0 16px;padding:14px 16px;background:var(--bg-soft);border:1px solid var(--border);border-left:3px solid var(--brand-accent);font-family:ui-monospace,SF Mono,Menlo,Consolas,monospace;font-size:13px;line-height:1.55;white-space:pre-wrap;color:#333;overflow-x:auto}.download-list{display:flex;flex-wrap:wrap;gap:10px;margin:8px 0 4px}.btn.download-btn{background:#fff;color:var(--brand-navy);border:1px solid var(--brand-navy);font-weight:600;padding:8px 14px;font-size:14px}.btn.download-btn:hover{background:var(--brand-navy);color:#fff}.feature-list{margin:0;padding-left:1.2em;color:#444;line-height:1.7}.feature-list li{margin-bottom:8px}.spec-table{width:100%;border-collapse:collapse;font-size:14px;margin:16px 0}.spec-table td,.spec-table th{border:1px solid var(--border);padding:10px 12px;text-align:left;vertical-align:top}.spec-table th{background:var(--bg-soft);width:140px}.note-box{background:#eef6f8;border:1px solid #c5dce2;padding:12px 16px;font-size:14px;margin-top:12px}.content-block{margin-top:24px}.content-block h2{font-size:20px;border-left:4px solid var(--brand-accent);padding-left:10px;margin:0 0 12px}.bottom-nav{display:none;position:fixed;left:0;right:0;bottom:0;height:var(--bottom-nav-h);background:#fff;border-top:1px solid var(--border);z-index:50;grid-template-columns:repeat(4,1fr)}.bottom-nav a{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;font-size:11px;color:#666}.bottom-nav a.active{color:var(--accent-green);font-weight:700}.bottom-nav svg{width:22px;height:22px}.mobile-only{display:none}.desktop-only{display:block}@media (max-width:960px){.product-grid{grid-template-columns:repeat(2,1fr)}.about-teaser,.detail-layout,.footer-grid{grid-template-columns:1fr}.logo span,.nav-links{display:none}.bottom-nav{display:grid}.mobile-only{display:block}.desktop-only{display:none}body{padding-bottom:calc(var(--bottom-nav-h) + 8px)}.category-layout{grid-template-columns:88px minmax(0,1fr)}.cat-main{padding:10px 8px}.subcat-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.subcat-item{padding:8px 4px}.subcat-item .icon{max-width:72px}.subcat-item .label{font-size:12px}.cat-sidebar a{padding:12px 6px;font-size:12px;line-height:1.35;word-break:break-all}.page-banner h1{font-size:18px}.product-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.container{width:min(1200px,calc(100% - 20px))}}@media (max-width:560px){.product-grid{grid-template-columns:1fr 1fr;gap:8px}.section{padding:32px 0}}