:root{--premium-navy:#0d2232;--premium-green:#153f34;--premium-gold:#c89b52;--premium-cream:#f5f3ed;--premium-shadow:0 24px 70px rgba(17,38,31,.12)}
body{background:#fff;color:#17211d}.wide-wrap{width:min(1440px,calc(100% - 56px));margin-right:auto;margin-left:auto}
.topbar{background:var(--premium-navy);border:0}.topbar-inner{min-height:42px;font-size:13px;letter-spacing:.02em}.nav-row{min-height:92px;gap:24px}.site-header{box-shadow:0 8px 30px rgba(15,34,48,.07)}.brand-mark{width:46px;height:46px;background:linear-gradient(145deg,#1f5947,#0f2f27);box-shadow:0 8px 22px rgba(21,63,52,.24)}.brand-wordmark strong{font-size:19px;letter-spacing:.18em}.site-nav{gap:0;margin-left:auto;padding:0 10px;border:1px solid #e5eae6;background:#fff}.site-nav a{position:relative;padding:12px 15px;font-weight:650;white-space:nowrap}.site-nav a:after{content:"";position:absolute;left:15px;right:calc(100% - 15px);bottom:4px;height:2px;background:var(--premium-gold);transition:.25s}.site-nav a:hover:after{right:15px}.header-cta{border-radius:3px;background:linear-gradient(135deg,#1b5846,#0e3a31);box-shadow:0 10px 24px rgba(21,63,52,.2)}
.page-hero{position:relative;isolation:isolate;min-height:410px;display:flex;align-items:center;padding:80px 0;color:#fff;background:#102b24 url('/static/images/duosen-premium-banner-v2.png') center 54%/cover no-repeat}.page-hero:before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(7,25,23,.94) 0%,rgba(9,30,27,.82) 42%,rgba(9,30,27,.28) 76%,rgba(9,30,27,.2) 100%)}.page-hero:after{content:"";position:absolute;left:0;bottom:0;width:36%;height:4px;background:var(--premium-gold)}.page-hero .wrap{width:min(1180px,calc(100% - 56px));margin-right:auto;margin-left:auto}.page-hero .breadcrumb,.page-hero .breadcrumb a{color:rgba(255,255,255,.72)}.page-hero h1{max-width:760px;margin:.3em 0 .24em;color:#fff;font-size:clamp(44px,5vw,68px);letter-spacing:-.035em;line-height:1.04}.page-hero p{max-width:680px;margin:0;color:rgba(255,255,255,.82);font-size:18px;line-height:1.8}.page-hero-actions{display:flex;gap:12px;margin-top:26px}.page-hero-actions .btn-primary{background:var(--premium-gold);color:#102b24;box-shadow:none}.page-hero-actions .btn-ghost{border-color:rgba(255,255,255,.42);background:rgba(255,255,255,.08);color:#fff}
.section{padding-top:92px;padding-bottom:92px}.premium-intro{margin-top:-44px;position:relative;z-index:3}.premium-intro-grid{display:grid;grid-template-columns:repeat(3,1fr);background:#fff;box-shadow:var(--premium-shadow);border-bottom:3px solid var(--premium-gold)}.premium-intro-grid article{padding:28px 30px;border-right:1px solid #e6e8e3}.premium-intro-grid article:last-child{border-right:0}.premium-intro-grid span{display:block;margin-bottom:8px;color:var(--premium-gold);font-size:12px;font-weight:800;letter-spacing:.14em}.premium-intro-grid strong{display:block;color:var(--premium-green);font-size:18px}.premium-intro-grid p{margin:.5em 0 0;color:#6a756f;line-height:1.65}
.content-grid{grid-template-columns:minmax(0,1fr) 300px;gap:54px;align-items:start}.content-grid>div:first-child{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.list-card{position:relative;display:flex;min-height:300px;margin:0;padding:34px;background:linear-gradient(145deg,#fff,#f8faf8);border:1px solid #e2e8e3;border-radius:2px;overflow:hidden;transition:.25s}.list-card>a{display:none}.list-card:before{content:"";position:absolute;left:0;top:0;width:4px;height:72px;background:var(--premium-gold)}.list-card:after{content:"DUOSEN";position:absolute;right:-8px;bottom:-10px;color:rgba(20,63,52,.035);font:800 48px/1 Arial,sans-serif;letter-spacing:.08em}.list-card:hover{transform:translateY(-5px);border-color:#bdcfc4;box-shadow:0 22px 50px rgba(15,45,36,.11)}.list-card>div{display:flex;flex-direction:column}.list-card h2{font-size:24px;line-height:1.35}.list-card p{color:#66736c;line-height:1.75}.list-card .text-link{margin-top:auto}.article-meta{color:#9a7a43;font-weight:700;letter-spacing:.08em}.sidebar{position:sticky;top:120px;padding:34px;background:var(--premium-navy);border:0;color:#fff;box-shadow:var(--premium-shadow)}.sidebar h2{color:#fff;font-size:23px}.sidebar p{color:#c8d2d6}.sidebar>a{display:block;padding:12px 0;color:#e8efec;border-bottom:1px solid rgba(255,255,255,.12)}.sidebar .btn{margin-top:14px;color:#fff;border:0;background:var(--premium-gold)}
.article-grid{gap:22px}.product-text-card{position:relative;min-height:280px;padding:34px;border:1px solid #e1e7e2;border-top:0;background:linear-gradient(145deg,#fff,#f6f8f6);box-shadow:0 14px 34px rgba(16,50,39,.06);transition:.25s}.product-text-card:before{content:"";position:absolute;left:0;top:0;width:100%;height:4px;background:linear-gradient(90deg,var(--premium-gold),var(--premium-green))}.product-text-card:hover{transform:translateY(-6px);box-shadow:0 24px 54px rgba(16,50,39,.13)}.product-text-card h2,.product-text-card h3{font-size:24px;line-height:1.35}.product-text-card p{font-size:15px}.detail-content{padding-right:42px;font-size:17px;line-height:1.9}.detail-content>p:first-child{font-size:20px;color:#33483f}.detail-content h2{padding-top:.3em;color:var(--premium-green);font-size:30px}.detail-content h2:after{content:"";display:block;width:42px;height:3px;margin-top:12px;background:var(--premium-gold)}.spec-note{margin-top:34px;padding:24px 26px;background:var(--premium-cream);border-left:4px solid var(--premium-gold)}.premium-cta{padding:68px 0;background:linear-gradient(120deg,#0c2730,#17483a);color:#fff}.premium-cta .wrap{display:flex;align-items:center;justify-content:space-between;gap:35px}.premium-cta h2{margin:.15em 0;color:#fff;font-size:38px}.premium-cta p{margin:0;color:#cbd8d3}.premium-cta .btn{background:var(--premium-gold);border-color:var(--premium-gold);color:#102b24}
@media(max-width:1100px){.site-nav a{padding-right:10px;padding-left:10px;font-size:13px}.header-cta{padding-right:16px;padding-left:16px}}@media(max-width:980px){.wide-wrap{width:min(100% - 36px,1440px)}.site-nav{border:0}.premium-intro-grid{grid-template-columns:1fr}.premium-intro-grid article{border-right:0;border-bottom:1px solid #e6e8e3}.content-grid{grid-template-columns:1fr}.content-grid>div:first-child{grid-template-columns:1fr 1fr}.sidebar{position:static}.page-hero{min-height:360px}.premium-cta .wrap{align-items:flex-start;flex-direction:column}}@media(max-width:700px){.nav-row{min-height:74px}.page-hero{min-height:330px;padding:55px 0}.page-hero h1{font-size:42px}.section{padding-top:64px;padding-bottom:64px}.content-grid>div:first-child{grid-template-columns:1fr}.premium-intro{margin-top:0}.premium-intro-grid{box-shadow:none}.list-card{min-height:260px}.detail-content{padding-right:0}.premium-cta h2{font-size:30px}}

/* V1.8 brand header, banner framing and CTA alignment */
.brand-symbol{width:54px;height:54px;object-fit:contain;filter:drop-shadow(0 7px 12px rgba(14,55,44,.18))}.brand-wordmark{min-width:218px}.brand-wordmark strong{font-size:20px}.brand-wordmark small{margin-top:2px;color:#6a7771;font-size:9px;letter-spacing:.2em}.topbar-contact{display:flex;align-items:center;gap:15px}.topbar-contact a{display:flex;align-items:center;gap:7px;color:#e7efec}.topbar-contact b{color:#cda65f;font-size:10px;letter-spacing:.12em}.topbar-contact i{width:1px;height:14px;background:rgba(255,255,255,.24)}.site-nav{border:0;padding:0;background:transparent}.nav-tools{display:flex;align-items:center;gap:12px;margin-left:3px}.language-switch{display:flex;gap:2px;padding:3px;border:1px solid #dce5df;border-radius:999px;background:#f4f7f5}.language-switch a{display:grid;place-items:center;min-width:34px;height:30px;padding:0 8px;border-radius:999px;color:#456057;font-size:12px;font-weight:800}.language-switch a.active{color:#fff;background:var(--premium-green);box-shadow:0 4px 10px rgba(21,63,52,.2)}.header-cta{min-height:40px;padding:0 17px;white-space:nowrap}.page-hero{min-height:clamp(430px,33.333vw,620px);background-image:url('/static/images/duosen-inner-banner-v3.png');background-position:center center}.page-hero:before{background:linear-gradient(90deg,rgba(6,27,24,.92) 0%,rgba(8,34,29,.75) 38%,rgba(8,34,29,.12) 68%,rgba(8,34,29,.05) 100%)}.duosen-hero .btn-ghost{color:var(--premium-green);border-color:#fff;background:#fff}.duosen-hero .btn-ghost:hover{color:#fff;border-color:var(--premium-gold);background:var(--premium-gold)}.sidebar>a.btn{display:flex;align-items:center;justify-content:center;min-height:46px;padding:0 18px;text-align:center}.page-hero-actions .btn{min-width:168px;text-align:center}.premium-cta .btn{min-width:178px;text-align:center}
@media(max-width:1220px){.brand-wordmark{min-width:190px}.site-nav a{padding-right:8px;padding-left:8px}.topbar-contact b{display:none}}
@media(max-width:980px){.brand-symbol{width:46px;height:46px}.brand-wordmark{min-width:0}.brand-wordmark small{display:none}.nav-tools{margin-left:8px}.language-switch{padding:2px}.language-switch a{min-width:30px;height:28px}.page-hero{min-height:420px;background-position:64% center}.page-hero .wrap{width:min(100% - 36px,1180px)}}
@media(max-width:620px){.brand-wordmark strong{font-size:16px}.page-hero{min-height:380px;background-position:69% center}.page-hero-actions{align-items:stretch;flex-direction:column;max-width:250px}.page-hero-actions .btn{width:100%}}
.brand-symbol{width:64px;height:54px}.brand-wordmark{gap:11px}.brand-wordmark small{font-size:6.5px;letter-spacing:.065em;white-space:nowrap;color:#61716a}
@media(max-width:980px){.brand-symbol{width:55px;height:46px}}

/* V2.1 header proportions, contact visibility and compact inner hero */
.topbar-inner{min-height:48px}.topbar-contact{gap:18px}.topbar-contact a{gap:8px;font-size:14px}.topbar-contact b{font-size:11px}.topbar-contact strong{color:#fff;font-size:14px;font-weight:750;letter-spacing:.015em}.topbar-contact i{height:18px}.brand img.brand-symbol{width:76px;height:58px;max-width:none;max-height:none}.brand-wordmark{min-width:286px;gap:13px}.brand-wordmark strong{font-size:22px;letter-spacing:.2em;line-height:1.05}.brand-wordmark small{margin-top:6px;font-size:7.25px;line-height:1.15;letter-spacing:.09em}.nav-tools{gap:12px}.page-hero{min-height:clamp(340px,22vw,430px);padding:0;background-size:cover;background-position:center 55%}
@media(max-width:1220px){.brand-wordmark{min-width:245px}.brand img.brand-symbol{width:66px;height:52px}.brand-wordmark strong{font-size:20px}.brand-wordmark small{font-size:6.5px}.topbar-contact strong{font-size:13px}}
@media(max-width:980px){.brand img.brand-symbol{width:56px;height:46px}.brand-wordmark{min-width:0}.page-hero{min-height:360px;padding:0;background-position:64% 55%}}
@media(max-width:620px){.topbar-inner{min-height:38px}.topbar-contact a{font-size:12px}.topbar-contact strong{font-size:12px}.page-hero{min-height:330px;padding:0;background-position:67% 55%}}

/* V2.3 image-led product catalogue */
.product-showcase-section{overflow:hidden}.product-showcase-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.product-showcase-card{overflow:hidden;background:#fff;border:1px solid #dde6df;box-shadow:0 16px 42px rgba(15,52,40,.08);transition:transform .25s,box-shadow .25s}.product-showcase-card:hover{transform:translateY(-6px);box-shadow:0 26px 58px rgba(15,52,40,.15)}.product-showcase-card img{display:block;width:100%;height:230px;object-fit:cover;background:#e9eeea}.product-showcase-body{padding:26px}.product-showcase-body>span{color:var(--premium-gold);font-size:11px;font-weight:850;letter-spacing:.13em}.product-showcase-body h3{min-height:2.55em;margin:.65em 0 .5em;color:var(--premium-green);font-size:23px;line-height:1.28}.product-showcase-body p{min-height:6em;margin:0;color:#5e6e66;line-height:1.75}.product-facts{display:flex;flex-wrap:wrap;gap:8px;margin:20px 0 0;padding:0;list-style:none}.product-facts li{padding:7px 10px;background:#f1f5f2;border:1px solid #e0e8e2;color:#385247;font-size:12px}.catalog-note{display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:22px;margin-top:28px;padding:24px 28px;background:linear-gradient(120deg,#0d2930,#17493b);color:#fff}.catalog-note strong{color:#d1aa62;font-size:18px;white-space:nowrap}.catalog-note p{margin:0;color:#d3ded9;line-height:1.7}.catalog-note .btn{white-space:nowrap}.parts-showcase{display:grid;grid-template-columns:minmax(0,1.04fr) minmax(0,.96fr);overflow:hidden;background:#0e2932;box-shadow:var(--premium-shadow)}.parts-showcase-media img{display:block;width:100%;height:100%;min-height:430px;object-fit:cover}.parts-showcase-copy{padding:54px;color:#d3ded9}.parts-showcase-copy h2{margin:.35em 0 .5em;color:#fff;font-size:clamp(30px,3vw,44px)}.parts-showcase-copy p,.parts-showcase-copy li{line-height:1.75}.parts-showcase-copy ul{padding-left:1.2em}.parts-note{padding:14px 16px;background:rgba(255,255,255,.07);border-left:3px solid var(--premium-gold)}.parts-actions{display:flex;align-items:center;gap:22px;margin-top:24px}.parts-actions .text-link{color:#fff}
@media(max-width:980px){.product-showcase-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.catalog-note{grid-template-columns:1fr}.catalog-note strong{white-space:normal}.parts-showcase{grid-template-columns:1fr}.parts-showcase-media img{min-height:340px;max-height:440px}.parts-showcase-copy{padding:40px}}
@media(max-width:620px){.product-showcase-grid{grid-template-columns:1fr}.product-showcase-card img{height:210px}.product-showcase-body h3,.product-showcase-body p{min-height:0}.catalog-note{padding:22px}.parts-showcase-media img{min-height:240px}.parts-showcase-copy{padding:30px 24px}.parts-actions{align-items:flex-start;flex-direction:column}}

/* V2.4 product-centre image catalogue */
.product-catalog-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}.product-catalog-card{overflow:hidden;background:#fff;border:1px solid #dde6df;box-shadow:0 14px 36px rgba(15,52,40,.08);transition:.25s}.product-catalog-card:hover{transform:translateY(-6px);box-shadow:0 24px 54px rgba(15,52,40,.14)}.product-catalog-image{display:block;overflow:hidden;background:#e9eeea}.product-catalog-image img{display:block;width:100%;height:238px;object-fit:cover;transition:transform .35s}.product-catalog-card:hover .product-catalog-image img{transform:scale(1.035)}.product-catalog-copy{padding:26px}.product-catalog-copy>span{color:var(--premium-gold);font-size:11px;font-weight:850;letter-spacing:.12em}.product-catalog-copy h2{min-height:2.65em;margin:.65em 0 .45em;font-size:23px;line-height:1.32}.product-catalog-copy p{min-height:5.5em;color:#607068;line-height:1.72}.product-detail-cover{margin:0 0 48px;background:#f2f5f2;border:1px solid #dfe6e1}.product-detail-cover img{display:block;width:100%;height:min(52vw,620px);min-height:360px;object-fit:cover}.product-detail-cover figcaption{padding:12px 18px;color:#718078;font-size:13px;text-align:center}.product-detail-section .content-grid{margin-top:0}
@media(max-width:980px){.product-catalog-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.product-detail-cover img{height:52vw;min-height:320px}}
@media(max-width:620px){.product-catalog-grid{grid-template-columns:1fr}.product-catalog-image img{height:220px}.product-catalog-copy h2,.product-catalog-copy p{min-height:0}.product-detail-cover{margin-bottom:32px}.product-detail-cover img{height:68vw;min-height:230px}}

/* V2.7 homepage rhythm and brand details */
.site-icp{color:inherit;text-decoration:none}.site-icp:hover{color:#fff;text-decoration:underline}.product-section{padding-top:78px;padding-bottom:54px}.product-section .category-grid{gap:0;border-top:1px solid #dce5df;border-bottom:1px solid #dce5df}.product-section .category-card{position:relative;padding:34px 38px;border:0;border-right:1px solid #dce5df;background:transparent;box-shadow:none}.product-section .category-card:last-child{border-right:0}.product-section .category-card:hover{background:#f4f7f4;transform:none}.product-section .card-no{position:absolute;right:24px;top:20px;color:rgba(15,70,54,.11);font-size:54px;font-weight:900}.product-showcase-section{padding-top:92px;padding-bottom:92px;background:linear-gradient(180deg,#f4f7f4 0,#fff 100%)}.product-showcase-card:nth-child(2),.product-showcase-card:nth-child(5){transform:translateY(18px)}.product-showcase-card:nth-child(2):hover,.product-showcase-card:nth-child(5):hover{transform:translateY(12px)}.section-dark{position:relative;overflow:hidden;padding:100px 0 132px;background:radial-gradient(circle at 82% 20%,rgba(28,112,84,.48),transparent 32%),linear-gradient(120deg,#091e25,#113c32)}.section-dark:after{content:"DS";position:absolute;right:-2vw;bottom:-.28em;color:rgba(255,255,255,.035);font-size:250px;font-weight:950;letter-spacing:-.1em}.section-dark+.section{position:relative;margin-top:-72px;padding-top:0}.section-dark+.section>.wrap{padding:42px;background:#fff;box-shadow:0 28px 70px rgba(7,31,26,.15)}.section-dark+.section .section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:28px}.section-dark+.section .process-grid{gap:0;border-top:1px solid #dce5df}.section-dark+.section .process-grid article{padding:30px 28px;border:0;border-right:1px solid #dce5df}.section-dark+.section .process-grid article:last-child{border-right:0}.guide-card{transition:.25s}.guide-card:hover{transform:translateY(-5px);box-shadow:0 20px 46px rgba(15,52,40,.1)}
@media(max-width:980px){.product-section .category-card{padding:28px 24px}.product-showcase-card:nth-child(2),.product-showcase-card:nth-child(5){transform:none}.section-dark+.section>.wrap{padding:30px}.section-dark+.section .process-grid article{border-right:0;border-bottom:1px solid #dce5df}}
@media(max-width:620px){.product-section{padding-top:56px}.product-section .category-grid{border:0}.product-section .category-card{border-right:0;border-bottom:1px solid #dce5df}.section-dark{padding:74px 0 100px}.section-dark+.section{margin-top:-48px}.section-dark+.section>.wrap{padding:24px}.section-dark+.section .section-head{display:block}}