:root{--color-ink:#16212b;--color-body:#3a4753;--color-muted:#6b7885;--color-line:#e2e6ea;--color-line-soft:#edf0f2;--color-surface:#fff;--color-surface-alt:#f6f8f9;--color-primary:#1f5c8b;--color-primary-dark:#163f5f;--color-accent:#d9761c;--color-accent-soft:#fdf1e4;--color-warn-bg:#fff6e0;--color-warn-border:#e8b33d;--radius:8px;--shadow-card:0 1px 2px rgba(22,33,43,.06),0 1px 12px rgba(22,33,43,.05);--max-width:1419px}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{font-family:-apple-system,Segoe UI,system-ui,PingFang SC,Microsoft YaHei,sans-serif;margin:0;color:var(--color-body);line-height:1.65;background:var(--color-surface);font-size:16px;-webkit-font-smoothing:antialiased}a{color:var(--color-primary)}a:hover{color:var(--color-primary-dark)}h1,h2,h3{color:var(--color-ink);font-weight:800;line-height:1.25;letter-spacing:-.015em}h1{font-size:2.6rem;margin:0 0 1rem}h2{font-size:1.4rem;margin:3rem 0 1.1rem;padding-bottom:.6rem;border-bottom:2px solid var(--color-line);position:relative}h2:before{content:"";position:absolute;left:0;bottom:-2px;width:42px;height:2px;background:var(--color-accent)}h3{font-size:1.05rem;margin:1.5rem 0 .4rem;font-weight:700}.site-header{display:flex;justify-content:space-between;align-items:center;padding:1.1rem 2rem;position:fixed;top:0;left:0;right:0;background:linear-gradient(180deg,rgba(10,16,22,.6),rgba(10,16,22,.25) 70%,rgba(10,16,22,0));z-index:50;transition:background .25s ease,box-shadow .25s ease}.site-header.is-scrolled{background:hsla(0,0%,100%,.96);-webkit-backdrop-filter:saturate(180%) blur(6px);backdrop-filter:saturate(180%) blur(6px);box-shadow:0 1px 2px rgba(22,33,43,.08)}.site-header.is-scrolled .brand{color:var(--color-ink)}.site-header.is-scrolled nav a{color:var(--color-body)}.site-header.is-scrolled nav a:hover{background:var(--color-surface-alt);color:var(--color-ink)}.site-header.is-scrolled nav a.nav-cta{color:var(--color-primary)}.site-header.is-scrolled nav a.nav-cta:hover{background:var(--color-surface-alt);color:var(--color-primary-dark)}.site-header.is-scrolled nav a.is-active{color:var(--color-primary);box-shadow:inset 0 -2px 0 var(--color-primary)}.brand{font-weight:800;text-decoration:none;color:#fff;font-size:1.25rem;letter-spacing:-.01em;transition:color .25s ease}.site-header nav{display:flex;align-items:center;gap:.5rem}.site-header nav a{margin-left:.5rem;text-decoration:none;color:hsla(0,0%,100%,.92);font-size:.95rem;padding:.5rem .75rem;border-radius:6px;transition:color .25s ease}.site-header nav a:hover{background:hsla(0,0%,100%,.14);color:#fff}.site-header nav a.nav-cta{color:var(--color-accent);font-weight:700}.site-header nav a.nav-cta:hover{background:hsla(0,0%,100%,.14);color:var(--color-accent)}.site-header nav a.is-active{color:#fff;font-weight:700;box-shadow:inset 0 -2px 0 var(--color-accent)}main{max-width:var(--max-width);margin:0 auto;padding:5.5rem 2rem 4rem;min-height:60vh}.hero-carousel{position:relative;left:50%;right:50%;width:100vw;margin:-5.5rem -50vw 3rem;height:100vh;height:100dvh;min-height:480px;overflow:hidden;background:var(--color-primary-dark)}.hero-track{display:flex;width:100%;height:100%;transition:transform .6s ease-in-out}.hero-slide{position:relative;flex:0 0 100%;width:100%;height:100%;background-size:cover;background-position:50%}.hero-slide-overlay{position:absolute;inset:0;background:linear-gradient(0deg,rgba(16,24,31,.78),rgba(16,24,31,.25) 55%,rgba(16,24,31,.15))}.hero-slide-content{position:relative;z-index:1;max-width:var(--max-width);margin:0 auto;height:100%;padding:0 2rem 4.5rem;display:flex;flex-direction:column;justify-content:flex-end;color:#fff}.hero-slide-content h1{color:#fff;font-size:2.6rem;max-width:720px;margin:0 0 .75rem}.hero-slide-content p{max-width:620px;font-size:1.05rem;color:hsla(0,0%,100%,.9);margin:0 0 1.5rem}.hero-slide-buttons{display:flex;flex-wrap:wrap;gap:.9rem}.hero-btn{display:inline-block;padding:.7rem 1.4rem;border:1.5px solid #fff;border-radius:999px;color:#fff;font-weight:700;font-size:.92rem;text-decoration:none;transition:background-color .15s ease,color .15s ease}.hero-btn:hover{background:#fff;color:var(--color-ink)}.hero-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:2;width:44px;height:44px;border-radius:999px;border:none;background:rgba(16,24,31,.35);color:#fff;font-size:1.6rem;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background-color .15s ease}.hero-arrow:hover{background:rgba(16,24,31,.6)}.hero-arrow-prev{left:1.25rem}.hero-arrow-next{right:1.25rem}.hero-dots{position:absolute;z-index:2;bottom:1.5rem;left:50%;transform:translateX(-50%);display:flex;gap:.5rem}.hero-dot{width:9px;height:9px;border-radius:999px;border:1.5px solid #fff;background:transparent;padding:0;cursor:pointer}.hero-dot.is-active{background:#fff}.home-section{scroll-margin-top:90px;padding-top:1rem;border-top:1px solid var(--color-line)}.home-section:first-of-type{border-top:none}@media (min-width:900px){.categories-section,.home-section{margin-left:calc(var(--max-width) * -.025);margin-right:calc(var(--max-width) * -.025)}}.section-banner{position:relative;left:50%;right:50%;width:100vw;margin:-5.5rem -50vw 3rem;height:320px;background-size:cover;background-position:50%;overflow:hidden;background-color:var(--color-primary-dark)}.section-banner.compact{height:200px;margin-bottom:2rem}.section-banner-overlay{position:absolute;inset:0;background:linear-gradient(0deg,rgba(16,24,31,.78),rgba(16,24,31,.3) 55%,rgba(16,24,31,.12))}.section-banner-content{position:relative;z-index:1;max-width:var(--max-width);margin:0 auto;height:100%;padding:0 2rem 2.25rem;display:flex;flex-direction:column;justify-content:flex-end;color:#fff}.section-banner-content h1{color:#fff;margin:0 0 .6rem}.section-banner-content p{max-width:620px;font-size:1.05rem;color:hsla(0,0%,100%,.9);margin:0 0 1.25rem}.section-banner-buttons{display:flex;flex-wrap:wrap;gap:.9rem}ul.card-grid{list-style:none;padding:0;margin:1.25rem 0 2rem;display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));grid-gap:1rem;gap:1rem}ul.card-grid li{margin:0;list-style:none;transition:transform .15s ease}ul.card-grid li:hover{transform:translateY(-2px)}ul.card-grid li a{font-weight:700;font-size:1.05rem;text-decoration:none;color:var(--color-ink);display:block}ul.card-grid li a:hover{color:var(--color-primary)}ul.card-grid li .card-desc{color:var(--color-muted);font-size:.92rem;margin-top:.35rem}ul.card-grid li .card-thumb{position:relative;display:block;width:100%;aspect-ratio:1/1;margin:0 0 .75rem;border-radius:var(--radius);background-size:cover;background-position:50%;background-color:var(--color-line)}.card-badge-new{position:absolute;top:.6rem;left:.6rem;background:var(--color-accent,#4caf50);color:#fff;font-size:.7rem;font-weight:700;letter-spacing:.03em;padding:.2rem .55rem;border-radius:4px;text-transform:uppercase;box-shadow:0 1px 3px rgba(22,33,43,.25)}.scenario-pill-row{display:flex;flex-wrap:wrap;gap:.5rem;margin-top:1.25rem}.scenario-pill{display:inline-block;padding:.5rem 1rem;border:1px solid var(--color-line);border-radius:999px;background:var(--color-surface);color:var(--color-ink);font-size:.85rem;font-weight:600;cursor:pointer}.scenario-pill:hover{border-color:var(--color-primary);color:var(--color-primary)}.scenario-pill.is-active{background:var(--color-primary);border-color:var(--color-primary);color:#fff}.product-grid-wrap{margin-top:.5rem}.product-grid-toolbar{display:flex;align-items:center;justify-content:space-between;margin:1.5rem 0 .5rem}.product-count{color:var(--color-muted);font-size:.92rem}.filter-toggle-btn{display:inline-flex;align-items:center;gap:.4rem;padding:.55rem 1.1rem;border:1px solid var(--color-line);border-radius:6px;background:var(--color-surface);color:var(--color-ink);font-size:.92rem;font-weight:600;cursor:pointer}.filter-toggle-btn:hover{border-color:var(--color-primary);color:var(--color-primary)}.pagination{display:flex;flex-wrap:wrap;gap:.4rem;margin:2rem 0}.pagination-btn{min-width:2.25rem;padding:.45rem .6rem;border:1px solid var(--color-line);border-radius:6px;background:var(--color-surface);color:var(--color-body);font-size:.9rem;cursor:pointer}.pagination-btn:hover{border-color:var(--color-primary);color:var(--color-primary)}.pagination-btn.is-active{background:var(--color-primary);border-color:var(--color-primary);color:#fff;font-weight:700}.filter-overlay{position:fixed;inset:0;background:rgba(16,24,31,.45);z-index:100;display:flex}.filter-panel{width:min(340px,85vw);height:100%;background:var(--color-surface);padding:1.5rem;overflow-y:auto;box-shadow:2px 0 24px rgba(16,24,31,.2)}.filter-panel-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:1rem}.filter-panel-header h3{margin:0}.filter-close-btn{background:none;border:none;font-size:1.5rem;line-height:1;cursor:pointer;color:var(--color-muted);padding:.25rem .5rem}.filter-close-btn:hover{color:var(--color-ink)}.filter-list{list-style:none;padding:0;margin:0}.filter-list li{margin:0 0 .85rem}.filter-list label{display:flex;align-items:center;gap:.6rem;cursor:pointer;font-size:.95rem;color:var(--color-body)}.filter-list input[type=checkbox]{width:16px;height:16px}.filter-clear-btn{margin-top:.5rem;background:none;border:none;color:var(--color-primary);font-size:.9rem;font-weight:600;cursor:pointer;padding:0}.filter-clear-btn:hover{color:var(--color-primary-dark)}table.specs-table{width:100%;border-collapse:collapse;margin:1rem 0 1.5rem;background:var(--color-surface);border:1px solid var(--color-line);border-radius:var(--radius);overflow:hidden}.specs-table td,.specs-table th{text-align:left;padding:.65rem .9rem;border-bottom:1px solid var(--color-line-soft);vertical-align:top}.specs-table tr:last-child td,.specs-table tr:last-child th{border-bottom:none}.specs-table th{width:34%;font-weight:600;color:var(--color-ink);background:var(--color-surface-alt)}.faq-list{margin:1rem 0 1.5rem}.faq-item{margin-bottom:.9rem;padding-bottom:.9rem;border-bottom:1px solid var(--color-line-soft)}.faq-item:last-child{border-bottom:none}.faq-item summary{cursor:pointer;font-weight:700;color:var(--color-ink)}.faq-item p{margin:.5rem 0 0;color:var(--color-body)}.cert-badges{display:flex;flex-wrap:wrap;gap:.5rem;margin:.75rem 0 1.25rem}.cert-badge{letter-spacing:.02em;background:var(--color-surface);border:1px solid var(--color-primary);padding:.25rem .7rem;border-radius:999px}.cert-badge,.sku-tag{display:inline-block;font-size:.78rem;font-weight:700;color:var(--color-primary)}.sku-tag{letter-spacing:.04em;text-transform:uppercase;background:var(--color-accent-soft);border:1px solid var(--color-warn-border);padding:.2rem .6rem;border-radius:999px;margin-bottom:.75rem}.breadcrumb{font-size:.85rem;color:var(--color-muted);margin-bottom:.75rem}.breadcrumb a{color:var(--color-muted);text-decoration:none}.breadcrumb a:hover{color:var(--color-primary);text-decoration:underline}.breadcrumb .sep{margin:0 .4rem}.site-footer{position:relative;border-top:none;background:var(--color-primary-dark);background-size:cover;background-position:50%;overflow:hidden;max-height:34vh}.site-footer.has-cover .site-footer-overlay{position:absolute;inset:0;background:linear-gradient(0deg,rgba(16,24,31,.88),rgba(16,24,31,.6))}.footer-inner{position:relative;z-index:1;max-width:var(--max-width);margin:0 auto;padding:3rem 2rem;font-size:.9rem;color:hsla(0,0%,100%,.85)}.footer-brand{font-weight:800;color:var(--color-ink);margin:0 0 .5rem}.notion-body{margin-top:2.5rem;padding-top:1.5rem;border-top:1px solid var(--color-line);font-size:1.2rem}.notion-body .notion{font-family:inherit}.notion-body .notion-page{max-width:100%!important;width:100%!important;margin:0!important;padding:0!important}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.notion-code-fallback{background:var(--color-surface-alt);border:1px solid var(--color-line);border-radius:var(--radius);padding:1rem 1.25rem;overflow-x:auto;font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:.85rem;color:var(--color-body);white-space:pre-wrap;word-break:break-word}.acoustic-freq-wrap{overflow-x:auto;margin:1rem 0 1.5rem}table.acoustic-freq-table{width:100%;min-width:420px;border-collapse:collapse;background:var(--color-surface);border:1px solid var(--color-line);border-radius:var(--radius);overflow:hidden;font-size:.72rem}.acoustic-freq-table td,.acoustic-freq-table th{text-align:center;padding:.35rem .4rem;border-bottom:1px solid var(--color-line-soft);border-right:1px solid var(--color-line-soft);white-space:nowrap}.acoustic-freq-table tr:last-child td,.acoustic-freq-table tr:last-child th{border-bottom:none}.acoustic-freq-table td:last-child,.acoustic-freq-table th:last-child{border-right:none}.acoustic-freq-table th{text-align:left;font-weight:600;color:var(--color-ink);background:var(--color-surface-alt);white-space:normal}.acoustic-freq-table tr:first-child td{font-weight:700;color:var(--color-ink)}.acoustic-rating-grid{display:flex;flex-direction:column;gap:.5rem;margin:0 0 1.5rem}.acoustic-rating-row{display:grid;grid-template-columns:repeat(auto-fit,minmax(88px,1fr));grid-gap:.4rem;gap:.4rem}.acoustic-rating-cell{display:flex;justify-content:space-between;align-items:baseline;padding:.4rem .6rem;background:var(--color-surface-alt);border:1px solid var(--color-line);border-radius:6px}.acoustic-rating-label{font-size:.7rem;color:var(--color-muted);font-weight:600}.acoustic-rating-value{font-size:.78rem;color:var(--color-ink);font-weight:500}.notion-body .notion-row>.notion-column.notion-column:first-child:nth-last-child(3){width:60%!important}.notion-body .notion-row>.notion-column.notion-column:last-child:nth-child(3){width:40%!important}.notion-body .notion-row:has(>.notion-column:nth-child(5)){gap:8px}.notion-body .notion-row:has(>.notion-column:nth-child(5))>.notion-column{width:auto!important;flex:1 1!important}.notion-body .notion-row:has(>.notion-column:nth-child(5))>.notion-spacer{display:none}.notion-body .notion-row:has(>.notion-column:nth-child(5)) .notion-asset-wrapper{aspect-ratio:1/1;border-radius:var(--radius);overflow:hidden}.notion-body .notion-row:has(>.notion-column:nth-child(5)) .notion-asset-wrapper img{width:100%;height:100%;object-fit:cover}.acoustic-standards-grid{display:grid;grid-template-columns:repeat(3,1fr);grid-gap:.75rem;gap:.75rem;margin:0 0 1.5rem}.acoustic-standard-card{background:var(--color-surface-alt);border:1px solid var(--color-line);border-radius:var(--radius);padding:.6rem .9rem}.acoustic-standard-name{font-size:.7rem;color:var(--color-muted);font-weight:600;margin-bottom:.35rem}.acoustic-standard-metric{display:flex;justify-content:space-between;align-items:baseline;gap:.75rem;padding:.15rem 0}.acoustic-standard-metric-label{font-size:.8rem;color:var(--color-body);font-weight:600}.acoustic-standard-metric-value{font-size:1.05rem;color:var(--color-ink);font-weight:800}.acoustic-section-title{font-size:.95rem;font-weight:800;letter-spacing:.02em;text-transform:uppercase;color:var(--color-ink);margin:1.5rem 0 .75rem}.cert-standards-row{font-size:1.1rem;font-weight:700;color:var(--color-ink);letter-spacing:.02em;margin:0 0 1.5rem}.sku-tag-inline{margin-bottom:0;margin-left:.4rem;font-size:.72rem;padding:.15rem .5rem;vertical-align:middle}