@import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:ital,wght@0,400;0,500;0,600;0,700;0,800;1,400;1,600&display=swap');
:root{--n:#071e3b;--n2:#06172c;--g:#f4b91f;--i:#101b2b;--m:#637789;--l:#d5dfe5;--p:#f5f4ef;--soft:#eaf0f3;--blue:#0a416f}
html body,html body *{font-family:"Be Vietnam Pro",Tahoma,Arial,sans-serif}body{background:var(--p);color:var(--i);font-size:16px;line-height:1.5}.hero,.dhero{background:linear-gradient(125deg,#061f39 0%,#0c3c66 100%)}.hero,.dhero{position:relative;overflow:hidden}.hero:before,.dhero:before{content:"";position:absolute;inset:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:58px 58px;mask-image:linear-gradient(90deg,#000,transparent 76%)}.hero>* ,.dhero>*{position:relative}.hero h1,.dhero h1{font-size:clamp(42px,5vw,67px);line-height:1.03;font-weight:700;letter-spacing:-.045em}.lead{font-size:19px;line-height:1.7}.ey,.sh small,.path small,.tag{color:#a17408}.btn{border-radius:0;font-size:14px;font-weight:800}.btn.primary{background:var(--g);border-color:var(--g);color:var(--n)}.btn:not(.primary){border-color:#6b8499}.art,.dart{background:#eaf0f3;border:1px solid rgba(255,255,255,.35);box-shadow:0 24px 50px rgba(0,27,45,.32)}.art small,.dart small{background:var(--g);color:var(--n)}.sec{padding:78px 0}.soft{background:var(--soft)}.sh h2{color:var(--n);font-size:clamp(38px,4vw,53px);font-weight:700;line-height:1.05;letter-spacing:-.045em}.sh p{font-size:14px;line-height:1.75}.paths .path,.card,.two>div,.scenario,.table,.faq details{border-color:var(--l);box-shadow:none}.path{border-top:4px solid var(--n);border-radius:0}.path strong{color:var(--n)}.path:hover{border-color:var(--n);box-shadow:0 18px 38px rgba(8,42,73,.11)}.card{border-top:4px solid var(--n);border-radius:0}.card .pic{background:#eaf0f3}.card .body{padding:20px}.card h3{color:var(--n);font-weight:800}.meta span{background:#eef3f6}.go{color:#8d670c}.band{background:var(--n)}.band h2{font-size:clamp(30px,3vw,42px);font-weight:700}.two>div{border-radius:0}.check span:before{color:#a17408}.warn{border-left-color:var(--g);background:#fff5d6}.table .row b{background:#f1f4f5;color:var(--n)}.aside{background:var(--n)}.anchors{background:#fff}.anchors a{color:#173f61}.form input,.form select,.form textarea{border-color:var(--l)}
@media(max-width:560px){body{font-size:15px}.hero h1,.dhero h1{font-size:42px}.lead{font-size:15px}.sec{padding:55px 0}.sh h2{font-size:37px}}

/* Parent category: same visual grammar as Motor giảm tốc, but fan-specific content. */
.fan-parent-motor{background:var(--p)}.fan-system-hero{position:relative;overflow:hidden;background:linear-gradient(125deg,#061f39 0%,#0c3c66 100%);color:#fff}.fan-system-hero:before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.055) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.055) 1px,transparent 1px);background-size:58px 58px;mask-image:linear-gradient(90deg,#000,transparent 74%)}.fan-system-hero:after{content:"";position:absolute;width:640px;height:640px;right:-290px;top:-190px;border:1px solid rgba(244,185,31,.2);border-radius:50%;box-shadow:0 0 0 54px rgba(255,255,255,.025),0 0 0 108px rgba(255,255,255,.015)}.fan-system-hero .c{position:relative;z-index:1}.fan-system-crumb{padding-top:28px;color:#bbcad6;font-size:12px}.fan-system-crumb a{color:#fff;text-decoration:none}.fan-system-grid{display:grid;grid-template-columns:1.03fr .97fr;gap:58px;align-items:center;padding:42px 0 70px}.fan-system-eyebrow{display:flex;align-items:center;gap:12px;margin:0 0 17px;color:var(--g);font-size:12px;font-weight:800;letter-spacing:.16em}.fan-system-eyebrow:before{content:"";display:block;width:34px;height:2px;background:var(--g)}.fan-system-copy h1{max-width:690px;margin:0;font-size:clamp(46px,5.2vw,67px);font-weight:700;line-height:1.03;letter-spacing:-.052em}.fan-system-copy .lead{max-width:690px;margin:24px 0 0;color:#c8d6e1;font-size:18px;line-height:1.72}.fan-system-proof{display:flex;flex-wrap:wrap;gap:8px;margin:27px 0}.fan-system-proof span{border:1px solid rgba(255,255,255,.23);padding:9px 11px;color:#e2ebf1;font-size:10px;font-weight:700}.fan-system-actions{display:flex;flex-wrap:wrap;gap:12px}.fan-system-actions a{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:15px 20px;text-decoration:none;font-size:14px;font-weight:800}.fan-system-actions .primary{background:var(--g);color:var(--n)}.fan-system-actions .ghost{border:1px solid #6b8499;color:#fff}.fan-system-visual{position:relative;min-height:440px}.fan-system-stage{position:absolute;inset:20px 0 0 20px;overflow:hidden;border:1px solid rgba(255,255,255,.35);background:linear-gradient(145deg,#f8fbfc 0%,#e5eef2 100%);box-shadow:0 28px 60px rgba(0,15,29,.34)}.fan-system-stage:before{content:"";position:absolute;inset:0;opacity:.45;background-image:linear-gradient(rgba(10,49,82,.075) 1px,transparent 1px),linear-gradient(90deg,rgba(10,49,82,.075) 1px,transparent 1px);background-size:38px 38px;mask-image:linear-gradient(145deg,#000,transparent 80%)}.fan-stage-main,.fan-stage-small{position:absolute;z-index:1;display:grid;place-items:center;background:rgba(255,255,255,.76);border:1px solid rgba(10,49,82,.1);box-shadow:0 15px 32px rgba(10,49,82,.14)}.fan-stage-main{inset:46px 100px 48px 40px}.fan-stage-small{right:18px;bottom:28px;width:180px;height:152px}.fan-stage-small.top{top:22px;bottom:auto;width:165px;height:132px}.fan-stage-main img,.fan-stage-small img{width:100%;height:100%;object-fit:contain;padding:18px}.fan-stage-caption{position:absolute;z-index:2;bottom:0;left:0;padding:11px 14px;background:var(--g);color:var(--n);font-size:10px;font-weight:900;letter-spacing:.08em}.fan-catalogue{padding:76px 0}.fan-catalogue-intro{display:grid;grid-template-columns:1fr 430px;gap:42px;align-items:end;margin-bottom:36px}.fan-catalogue-intro small,.fan-shelf-head small{color:#a17408;font-size:11px;font-weight:900;letter-spacing:.12em}.fan-catalogue-intro h2{max-width:700px;margin:9px 0 0;color:var(--n);font-size:53px;font-weight:700;line-height:1.05;letter-spacing:-.045em}.fan-catalogue-intro p{margin:0;color:var(--m);font-size:14px;line-height:1.75}.fan-shelf{margin-top:58px}.fan-shelf:first-of-type{margin-top:0}.fan-shelf-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:18px;padding-bottom:16px;border-bottom:1px solid var(--l)}.fan-shelf-head h2{margin:8px 0 0;color:var(--n);font-size:30px;font-weight:800;line-height:1.16;letter-spacing:-.025em}.fan-shelf-head p{max-width:620px;margin:7px 0 0;color:var(--m);font-size:13px;line-height:1.55}.fan-shelf-head a{flex:0 0 auto;color:var(--n);font-size:13px;font-weight:800;text-decoration:none}.fan-shelf-head a:hover{color:#a17408}.fan-product-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px}.fan-model-card{display:flex;min-width:0;flex-direction:column;border-top:4px solid var(--n);background:#fff;box-shadow:0 8px 22px rgba(8,42,73,.05);transition:transform .22s,box-shadow .22s}.fan-model-card:hover{transform:translateY(-3px);box-shadow:0 18px 38px rgba(8,42,73,.12)}.fan-model-image{position:relative;height:190px;overflow:hidden;background:#eaf0f3}.fan-model-image img{display:block;width:100%;height:100%;object-fit:contain;padding:13px}.fan-model-copy{display:flex;flex:1;flex-direction:column;padding:17px}.fan-model-tag{margin:0 0 8px;color:#9b7008;font-size:10px;font-weight:900;letter-spacing:.1em}.fan-model-card h3{display:-webkit-box;min-height:52px;margin:0;color:#092b4d;font-size:16px;font-weight:800;line-height:1.35;overflow:hidden;-webkit-line-clamp:2;-webkit-box-orient:vertical}.fan-model-specs{display:grid;grid-template-columns:1fr 1fr;margin:14px 0;border:1px solid var(--l)}.fan-model-specs span{min-width:0;padding:8px;border-right:1px solid var(--l)}.fan-model-specs span:last-child{border-right:0}.fan-model-specs small,.fan-model-specs b{display:block}.fan-model-specs small{color:#7b8e9d;font-size:7px;font-weight:800;letter-spacing:.07em}.fan-model-specs b{margin-top:3px;color:#173f61;font-size:10px;line-height:1.35;overflow-wrap:anywhere}.fan-model-card .fan-detail-link{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding:12px 13px;background:var(--g);color:var(--n);font-size:12px;font-weight:800;text-decoration:none}.fan-model-card .fan-detail-link:hover{background:#ffca34}.fan-parent-insight{background:var(--soft);padding:78px 0}.fan-insight-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.fan-insight{padding:24px;border:1px solid var(--l);border-top:4px solid var(--n);background:#fff}.fan-insight b{display:block;color:#a17408;font-size:10px;letter-spacing:.1em}.fan-insight h3{margin:9px 0;color:var(--n);font-size:20px;line-height:1.2}.fan-insight p{margin:0;color:var(--m);font-size:13px;line-height:1.65}.fan-notfit{margin-top:20px;padding:25px;border-left:5px solid var(--g);background:#fff5d6}.fan-notfit strong{display:block;margin-bottom:7px;color:var(--n);font-size:18px}.fan-notfit p{max-width:900px;margin:0;color:#607585;font-size:13px;line-height:1.65}.fan-consult{padding:70px 0;background:var(--n);color:#fff}.fan-consult-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:42px;align-items:center}.fan-consult .fan-system-eyebrow{margin-bottom:14px}.fan-consult h2{margin:0;color:#fff;font-size:48px;line-height:1.08;letter-spacing:-.045em}.fan-consult p{margin:18px 0 0;color:#c4d2dd;font-size:15px;line-height:1.75}.fan-consult-card{padding:28px;background:#fff;color:var(--i)}.fan-consult-card h3{margin:0;color:var(--n);font-size:22px}.fan-consult-card p{margin:9px 0 18px;color:var(--m);font-size:13px}.fan-consult-card .fan-check{display:grid;gap:10px;margin:0 0 18px}.fan-consult-card .fan-check span{padding-top:10px;border-top:1px solid var(--l);color:#476174;font-size:13px}.fan-consult-card .fan-check span:before{content:"✓";margin-right:8px;color:#a17408;font-weight:900}.fan-consult-card a{display:flex;justify-content:space-between;align-items:center;padding:15px 18px;background:var(--g);color:var(--n);font-size:14px;font-weight:800;text-decoration:none}
@media(max-width:900px){.fan-system-grid,.fan-catalogue-intro,.fan-consult-grid{grid-template-columns:1fr}.fan-system-visual{max-width:600px;width:100%;margin:auto}.fan-catalogue-intro{gap:18px}.fan-product-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.fan-insight-grid{grid-template-columns:repeat(2,1fr)}.fan-shelf-head{align-items:start;flex-direction:column}.fan-shelf-head a{padding-top:4px}}@media(max-width:560px){.fan-system-crumb{padding-top:22px}.fan-system-grid{gap:28px;padding:32px 0 48px}.fan-system-copy h1{font-size:42px}.fan-system-copy .lead{font-size:15px}.fan-system-visual{min-height:330px}.fan-system-stage{inset:8px 0 0 8px}.fan-stage-main{inset:34px 66px 34px 22px}.fan-stage-small{right:9px;bottom:17px;width:118px;height:105px}.fan-stage-small.top{top:13px;width:110px;height:92px}.fan-stage-main img,.fan-stage-small img{padding:10px}.fan-catalogue,.fan-parent-insight{padding:55px 0}.fan-catalogue-intro h2{font-size:37px}.fan-shelf{margin-top:44px}.fan-shelf-head h2{font-size:25px}.fan-product-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.fan-model-image{height:155px}.fan-model-copy{padding:14px}.fan-model-card h3{min-height:58px;font-size:15px}.fan-model-specs{grid-template-columns:1fr}.fan-model-specs span{border-right:0;border-bottom:1px solid var(--l)}.fan-model-specs span:last-child{border-bottom:0}.fan-insight-grid{grid-template-columns:1fr}.fan-consult{padding:55px 0}.fan-consult h2{font-size:37px}}

/* WS-400 demo: square visual treatment for a square industrial exhaust fan. */
.ws400-page .dhero .dgrid{grid-template-columns:minmax(0,1fr) minmax(410px,520px);gap:58px}.ws400-page .dhero .dart{isolation:isolate;justify-self:end;width:100%;max-width:520px;min-height:0;aspect-ratio:1/1;overflow:hidden;border:1px solid rgba(197,220,231,.58);background:radial-gradient(circle at 50% 45%,#dbeef4 0%,#a5bfcb 37%,#3b6983 70%,#0b314d 100%);box-shadow:0 30px 70px rgba(0,13,30,.48)}.ws400-page .dhero .dart:before{content:"";position:absolute;z-index:0;inset:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.12) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.12) 1px,transparent 1px);background-size:40px 40px;mask-image:linear-gradient(135deg,#000,transparent 78%)}.ws400-page .dhero .dart:after{content:"";position:absolute;z-index:1;inset:22px;border:1px solid rgba(255,255,255,.38);pointer-events:none}.ws400-page .dhero .dart img{z-index:0;inset:0;width:100%;height:100%;padding:0;object-fit:cover;object-position:center;mix-blend-mode:multiply;filter:contrast(1.08) saturate(.82);transform:scale(1.055)}.ws400-page .dhero .dart small{z-index:2;bottom:18px;left:18px;padding:9px 12px}.ws400-media{padding:78px 0;background:#f5f4ef}.ws400-media-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:24px;align-items:stretch}.ws400-image-card{position:relative;isolation:isolate;overflow:hidden;min-height:0;aspect-ratio:1/1;border:1px solid #cbd9e0;background:radial-gradient(circle at 50% 46%,#e1f0f4 0%,#a9c2cc 40%,#3e6b84 72%,#0a304c 100%);box-shadow:0 18px 42px rgba(8,42,73,.14)}.ws400-image-card:before{content:"";position:absolute;z-index:0;inset:0;pointer-events:none;background-image:linear-gradient(rgba(255,255,255,.12) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.12) 1px,transparent 1px);background-size:42px 42px;mask-image:linear-gradient(135deg,#000,transparent 80%)}.ws400-image-card:after{content:"";position:absolute;z-index:1;inset:22px;border:1px solid rgba(255,255,255,.34);pointer-events:none}.ws400-image-card img{position:absolute;z-index:0;inset:0;display:block;width:100%;height:100%;object-fit:cover;object-position:center;mix-blend-mode:multiply;filter:contrast(1.08) saturate(.82)}.ws400-image-card.overall img{transform:scale(1.055)}.ws400-image-card.closeup img{transform:scale(1.68);object-position:center 48%}.ws400-image-label{position:absolute;z-index:2;bottom:18px;left:18px;margin:0;padding:9px 12px;background:#f4b91f;color:#071e3b;font-size:10px;font-weight:900;letter-spacing:.08em}.ws400-image-note{margin:12px 0 0;color:#637789;font-size:13px;line-height:1.6}.ws400-image-note strong{display:block;margin-bottom:3px;color:#071e3b;font-size:15px}@media(max-width:900px){.ws400-page .dhero .dgrid,.ws400-media-grid{grid-template-columns:1fr}.ws400-page .dhero .dart{justify-self:start;max-width:600px}.ws400-media-grid{gap:20px}}@media(max-width:560px){.ws400-page .dhero .dart{max-width:none}.ws400-page .dhero .dart:after,.ws400-image-card:after{inset:14px}.ws400-media{padding:55px 0}.ws400-image-label{bottom:14px;left:14px}.ws400-image-note{font-size:12px}}

/* WS-400 poster art direction: dark industrial catalogue visual inspired by the approved reference. */
.ws400-page .dhero .dart{border-color:#1e4969;background:linear-gradient(145deg,#071a2e 0%,#123653 53%,#06172c 100%);box-shadow:0 32px 76px rgba(0,8,22,.62)}.ws400-page .dhero .dart:before{z-index:1;opacity:.8;background-image:repeating-radial-gradient(circle at 48% 48%,transparent 0,transparent 52px,rgba(183,207,220,.16) 53px,transparent 54px,transparent 81px),linear-gradient(90deg,transparent 49.8%,rgba(229,239,243,.2) 50%,transparent 50.2%),linear-gradient(transparent 49.8%,rgba(229,239,243,.18) 50%,transparent 50.2%);background-size:auto,100% 100%,100% 100%;mask-image:none}.ws400-page .dhero .dart:after{z-index:2;inset:0;border:0;background:linear-gradient(90deg,rgba(2,16,33,.48),transparent 28%,transparent 70%,rgba(2,16,33,.28)),linear-gradient(0deg,rgba(2,16,33,.5),transparent 35%);pointer-events:none}.ws400-page .dhero .dart img{z-index:0;mix-blend-mode:screen;opacity:.72;filter:brightness(.78) contrast(1.28) saturate(.55);transform:scale(1.055)}.ws400-page .dhero .dart small{z-index:4;bottom:28px;left:30px;padding:0;background:transparent;color:#a9c1d7;font-size:10px;font-weight:500;letter-spacing:.15em}.ws400-hero-brand{position:absolute;z-index:4;bottom:120px;left:34px;display:flex;align-items:center;gap:15px}.ws400-hero-brand strong{color:#f4b91f;font-size:78px;font-weight:400;line-height:.8;letter-spacing:-.1em}.ws400-hero-brand span{padding-left:16px;border-left:1px solid rgba(226,238,244,.55);color:#fff;font-size:14px;font-weight:600;line-height:1.38;letter-spacing:.13em}.ws400-image-card{background:linear-gradient(145deg,#071a2e 0%,#123653 53%,#06172c 100%);border-color:#1e4969}.ws400-image-card:before{z-index:1;opacity:.75;background-image:repeating-radial-gradient(circle at 48% 48%,transparent 0,transparent 52px,rgba(183,207,220,.16) 53px,transparent 54px,transparent 81px),linear-gradient(90deg,transparent 49.8%,rgba(229,239,243,.2) 50%,transparent 50.2%),linear-gradient(transparent 49.8%,rgba(229,239,243,.18) 50%,transparent 50.2%);background-size:auto,100% 100%,100% 100%;mask-image:none}.ws400-image-card:after{z-index:2;inset:0;border:0;background:linear-gradient(90deg,rgba(2,16,33,.48),transparent 28%,transparent 70%,rgba(2,16,33,.28)),linear-gradient(0deg,rgba(2,16,33,.5),transparent 35%)}.ws400-image-card img{z-index:0;mix-blend-mode:screen;opacity:.72;filter:brightness(.78) contrast(1.28) saturate(.55)}.ws400-image-label{z-index:3;bottom:24px;left:24px;background:transparent;color:#a9c1d7;font-size:10px;font-weight:500;letter-spacing:.15em}@media(max-width:560px){.ws400-page .dhero .dart small{bottom:18px;left:20px;font-size:8px}.ws400-hero-brand{bottom:90px;left:22px;gap:10px}.ws400-hero-brand strong{font-size:56px}.ws400-hero-brand span{padding-left:11px;font-size:10px}.ws400-image-label{bottom:17px;left:17px;font-size:8px}}

/* WS-400 conversion structure: fast qualification, verified specs and replacement check. */
.ws400-page .dhero h1 span{display:block;color:#f4b91f}.ws400-keyline{margin:18px 0 0;padding-left:14px;border-left:3px solid #f4b91f;color:#edf4f7;font-size:14px;font-weight:700;line-height:1.55}.ws400-page .dhero .lead{margin-top:18px}.ws400-page .dhero .chips{grid-template-columns:repeat(4,1fr);margin:22px 0}.ws400-page .anchors .c{gap:28px}.ws400-spec-overview{display:grid;grid-template-columns:repeat(4,1fr);margin:0 0 20px;border:1px solid #d5dfe5;background:#fff}.ws400-spec-overview>div{min-width:0;padding:14px 16px;border-right:1px solid #d5dfe5}.ws400-spec-overview>div:last-child{border-right:0}.ws400-spec-overview small,.ws400-spec-overview b{display:block}.ws400-spec-overview small{color:#7b8e9d;font-size:8px;font-weight:800;letter-spacing:.09em}.ws400-spec-overview b{margin-top:5px;color:#173f61;font-size:13px;line-height:1.4;overflow-wrap:anywhere}.ws400-page .layout{align-items:stretch}.ws400-page .layout .aside{display:flex;flex-direction:column}.ws400-replacement h3{margin-bottom:12px}.ws400-replacement>p:not(.ey){margin-bottom:18px}.ws400-quote-check{display:grid;gap:0;margin-top:4px}.ws400-quote-check>div{display:grid;grid-template-columns:32px 1fr;gap:9px;padding:12px 0;border-top:1px solid rgba(255,255,255,.18)}.ws400-quote-check b{color:#f4b91f;font-size:11px}.ws400-quote-check span{color:#e3edf2;font-size:13px;line-height:1.5}.ws400-replacement .btn{margin-top:auto}.ws400-fit-scan{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:0 0 18px}.ws400-fit-scan article{padding:24px;border:1px solid #d5dfe5;background:#fff}.ws400-fit-scan .fit-good{border-top:4px solid #071e3b}.ws400-fit-scan .fit-avoid{border-top:4px solid #f4b91f;background:#fffaf0}.ws400-fit-scan small{color:#9b7008;font-size:10px;font-weight:900;letter-spacing:.1em}.ws400-fit-scan h3{margin:9px 0 13px;color:#071e3b;font-size:21px;line-height:1.2}.ws400-fit-scan ul{display:grid;gap:9px;margin:0;padding:0;list-style:none}.ws400-fit-scan li{position:relative;padding-left:18px;color:#607585;font-size:13px;line-height:1.55}.ws400-fit-scan .fit-good li:before{content:"✓";position:absolute;left:0;color:#a17408;font-weight:900}.ws400-fit-scan .fit-avoid li:before{content:"–";position:absolute;left:2px;color:#a17408;font-weight:900}.ws400-page .warn{margin-top:20px}@media(max-width:900px){.ws400-page .dhero .chips{grid-template-columns:repeat(2,1fr)}.ws400-spec-overview{grid-template-columns:repeat(2,1fr)}.ws400-spec-overview>div:nth-child(2){border-right:0}.ws400-spec-overview>div:nth-child(-n+2){border-bottom:1px solid #d5dfe5}}@media(max-width:560px){.ws400-keyline{font-size:12px}.ws400-page .anchors .c{gap:20px}.ws400-spec-overview{grid-template-columns:1fr}.ws400-spec-overview>div,.ws400-spec-overview>div:nth-child(2){border-right:0;border-bottom:1px solid #d5dfe5}.ws400-spec-overview>div:last-child{border-bottom:0}.ws400-fit-scan{grid-template-columns:1fr}.ws400-fit-scan article{padding:20px}.ws400-fit-scan h3{font-size:19px}.ws400-quote-check span{font-size:12px}}

/* WS-400 visual verification: one truthful product view + a decision-support checklist. */
.ws400-visual-check{padding:74px 0 78px;background:#f5f4ef}.ws400-visual-head{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(300px,.72fr);gap:52px;align-items:end;margin-bottom:28px}.ws400-visual-head small{display:block;margin-bottom:9px;color:#a17408;font-size:11px;font-weight:900;letter-spacing:.13em}.ws400-visual-head h2{max-width:720px;margin:0;color:#071e3b;font-size:clamp(34px,3.4vw,46px);font-weight:700;line-height:1.08;letter-spacing:-.045em}.ws400-visual-head p{max-width:470px;margin:0 0 3px;color:#637789;font-size:14px;line-height:1.72}.ws400-visual-layout{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(360px,.92fr);gap:24px;align-items:stretch}.ws400-feature-photo{position:relative;isolation:isolate;display:flex;min-height:510px;margin:0;overflow:hidden;align-items:center;justify-content:center;border:1px solid #1e4969;background:linear-gradient(145deg,#071a2e 0%,#123653 53%,#06172c 100%);box-shadow:0 18px 42px rgba(8,42,73,.14)}.ws400-feature-photo:before{position:absolute;z-index:1;inset:0;content:"";pointer-events:none;opacity:.78;background-image:repeating-radial-gradient(circle at 48% 48%,transparent 0,transparent 52px,rgba(183,207,220,.16) 53px,transparent 54px,transparent 81px),linear-gradient(90deg,transparent 49.8%,rgba(229,239,243,.2) 50%,transparent 50.2%),linear-gradient(transparent 49.8%,rgba(229,239,243,.18) 50%,transparent 50.2%);background-size:auto,100% 100%,100% 100%}.ws400-feature-photo:after{position:absolute;z-index:2;inset:0;content:"";pointer-events:none;background:linear-gradient(90deg,rgba(2,16,33,.48),transparent 28%,transparent 70%,rgba(2,16,33,.28)),linear-gradient(0deg,rgba(2,16,33,.52),transparent 36%)}.ws400-feature-photo img{position:absolute;z-index:0;inset:0;display:block;width:100%;height:100%;object-fit:cover;object-position:center;mix-blend-mode:screen;opacity:.72;filter:brightness(.78) contrast(1.28) saturate(.55);transform:scale(1.055)}.ws400-feature-photo figcaption{position:absolute;z-index:3;bottom:27px;left:28px;right:24px;color:#a9c1d7;font-size:10px;font-weight:500;letter-spacing:.15em;line-height:1.45}.ws400-visual-guide{display:flex;min-height:510px;flex-direction:column;justify-content:space-between;padding:31px 32px 28px;background:#071e3b;color:#fff;box-shadow:0 18px 42px rgba(8,42,73,.14)}.ws400-visual-guide .ey{margin:0 0 11px;color:#f4b91f;font-size:10px;font-weight:900;letter-spacing:.13em}.ws400-visual-guide h3{max-width:390px;margin:0;color:#fff;font-size:29px;font-weight:700;line-height:1.14;letter-spacing:-.035em}.ws400-visual-guide>div>p:not(.ey){max-width:390px;margin:13px 0 22px;color:#bbcad6;font-size:13px;line-height:1.6}.ws400-visual-guide ol{display:grid;margin:0;padding:0;list-style:none}.ws400-visual-guide li{display:grid;grid-template-columns:31px 1fr;gap:10px;padding:15px 0;border-top:1px solid rgba(255,255,255,.18)}.ws400-visual-guide li b{color:#f4b91f;font-size:11px;line-height:1.5}.ws400-visual-guide li span{display:grid;gap:3px;color:#dce7ee;font-size:13px;line-height:1.5}.ws400-visual-guide li strong{color:#fff;font-size:14px}.ws400-visual-guide>a{display:flex;align-items:center;justify-content:space-between;min-height:53px;margin-top:25px;padding:14px 17px;background:#f4b91f;color:#071e3b;font-size:14px;font-weight:800;text-decoration:none;transition:background .2s,transform .2s}.ws400-visual-guide>a:hover{background:#ffca34;transform:translateY(-2px)}.ws400-visual-guide>a b{font-size:19px;line-height:1}
@media(max-width:900px){.ws400-visual-check{padding:60px 0}.ws400-visual-head,.ws400-visual-layout{grid-template-columns:1fr;gap:17px}.ws400-visual-head{margin-bottom:24px}.ws400-visual-head p{max-width:650px}.ws400-feature-photo,.ws400-visual-guide{min-height:0}.ws400-feature-photo{aspect-ratio:1.08/1}.ws400-visual-guide{padding:29px 28px}}
@media(max-width:560px){.ws400-visual-check{padding:52px 0}.ws400-visual-head{gap:12px;margin-bottom:20px}.ws400-visual-head h2{font-size:31px;line-height:1.12}.ws400-visual-head p{font-size:13px;line-height:1.65}.ws400-visual-layout{gap:16px}.ws400-feature-photo{aspect-ratio:1/1}.ws400-feature-photo figcaption{bottom:18px;left:19px;right:16px;font-size:8px;letter-spacing:.12em}.ws400-visual-guide{padding:24px 20px 20px}.ws400-visual-guide h3{font-size:25px}.ws400-visual-guide>div>p:not(.ey){margin:11px 0 17px}.ws400-visual-guide li{grid-template-columns:28px 1fr;padding:13px 0}.ws400-visual-guide li span{font-size:12px}.ws400-visual-guide li strong{font-size:13px}.ws400-visual-guide>a{min-height:50px;margin-top:21px;font-size:13px}}

/* WS-400 sizing consultation and FAQ: remove uncertainty before the quote request. */
.ws400-sizing{padding:76px 0;background:#fff}.ws400-sizing-grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(420px,1.1fr);gap:66px;align-items:center}.ws400-sizing-intro>small,.ws400-faq-head small{display:block;margin-bottom:10px;color:#a17408;font-size:11px;font-weight:900;letter-spacing:.13em}.ws400-sizing-intro h2,.ws400-faq-head h2{max-width:590px;margin:0;color:#071e3b;font-size:clamp(35px,3.6vw,49px);font-weight:700;line-height:1.08;letter-spacing:-.045em}.ws400-sizing-intro>p{max-width:535px;margin:20px 0 26px;color:#637789;font-size:15px;line-height:1.75}.ws400-sizing-link{display:inline-flex;align-items:center;gap:16px;min-height:51px;padding:15px 19px;background:#f4b91f;color:#071e3b;font-size:14px;font-weight:800;text-decoration:none;transition:background .2s,transform .2s}.ws400-sizing-link:hover{background:#ffca34;transform:translateY(-2px)}.ws400-sizing-link b{font-size:19px;line-height:1}.ws400-sizing-card{padding:29px 32px 25px;border-top:4px solid #f4b91f;background:#071e3b;box-shadow:0 18px 42px rgba(8,42,73,.14)}.ws400-sizing-card .ey{margin:0 0 13px;color:#f4b91f;font-size:10px;font-weight:900;letter-spacing:.12em}.ws400-sizing-card ol{display:grid;margin:0;padding:0;list-style:none}.ws400-sizing-card li{display:grid;grid-template-columns:31px 1fr;gap:10px;padding:12px 0;border-top:1px solid rgba(255,255,255,.18)}.ws400-sizing-card li b{color:#f4b91f;font-size:11px;line-height:1.55}.ws400-sizing-card li span{display:grid;gap:2px;color:#dce7ee;font-size:13px;line-height:1.48}.ws400-sizing-card li strong{color:#fff;font-size:14px}.ws400-sizing-note{margin:17px 0 0;padding-top:15px;border-top:1px solid rgba(255,255,255,.18);color:#a9c1d7;font-size:12px;font-style:italic;line-height:1.6}.ws400-faq{padding:76px 0}.ws400-faq-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(300px,.62fr);gap:48px;align-items:end;margin-bottom:27px}.ws400-faq-head p{max-width:450px;margin:0 0 3px;color:#637789;font-size:14px;line-height:1.7}.ws400-faq-list{border-top:1px solid #d5dfe5}.ws400-faq-list details{border:0;border-bottom:1px solid #d5dfe5;background:#fff}.ws400-faq-list summary{display:grid;grid-template-columns:38px 1fr 20px;gap:13px;align-items:center;padding:19px 21px;cursor:pointer;list-style:none;color:#071e3b;font-size:16px;font-weight:800;line-height:1.45}.ws400-faq-list summary::-webkit-details-marker{display:none}.ws400-faq-list summary span{color:#a17408;font-size:10px;font-weight:900;letter-spacing:.08em}.ws400-faq-list summary b{justify-self:end;color:#a17408;font-size:24px;font-weight:400;line-height:1;transition:transform .18s}.ws400-faq-list details[open] summary{background:#f8fafb}.ws400-faq-list details[open] summary b{transform:rotate(45deg)}.ws400-faq-list details>div{padding:0 59px 21px}.ws400-faq-list details p{max-width:860px;margin:0;color:#637789;font-size:14px;line-height:1.75}.ws400-page .band .form input[name="space"]{grid-column:span 1}
@media(max-width:900px){.ws400-sizing{padding:60px 0}.ws400-sizing-grid,.ws400-faq-head{grid-template-columns:1fr;gap:22px}.ws400-sizing-card{max-width:680px}.ws400-faq-head{margin-bottom:23px}.ws400-faq-head p{max-width:640px}}
@media(max-width:560px){.ws400-sizing,.ws400-faq{padding:52px 0}.ws400-sizing-grid{gap:25px}.ws400-sizing-intro h2,.ws400-faq-head h2{font-size:31px;line-height:1.12}.ws400-sizing-intro>p{margin:15px 0 21px;font-size:13px;line-height:1.68}.ws400-sizing-link{display:flex;justify-content:space-between;font-size:13px}.ws400-sizing-card{padding:24px 20px 20px}.ws400-sizing-card li{grid-template-columns:27px 1fr;padding:11px 0}.ws400-sizing-card li span{font-size:12px}.ws400-sizing-card li strong{font-size:13px}.ws400-sizing-note{font-size:11px}.ws400-faq-head{gap:12px;margin-bottom:20px}.ws400-faq-head p{font-size:13px;line-height:1.65}.ws400-faq-list summary{grid-template-columns:28px 1fr 17px;gap:9px;padding:16px 15px;font-size:14px}.ws400-faq-list summary b{font-size:21px}.ws400-faq-list details>div{padding:0 15px 17px 52px}.ws400-faq-list details p{font-size:13px;line-height:1.68}}

/* WS-400 journey order: qualify the buyer before technical detail. */
.ws400-intent{padding:48px 0 52px;background:#fff}.ws400-intent-head{display:flex;align-items:end;justify-content:space-between;gap:36px;margin-bottom:20px}.ws400-intent-head small{display:block;margin-bottom:8px;color:#a17408;font-size:10px;font-weight:900;letter-spacing:.13em}.ws400-intent-head h2{margin:0;color:#071e3b;font-size:clamp(30px,3vw,40px);font-weight:700;line-height:1.1;letter-spacing:-.04em}.ws400-intent-head p{max-width:460px;margin:0 0 2px;color:#637789;font-size:13px;line-height:1.65}.ws400-intent .scenarios{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.ws400-intent .scenario{display:flex;min-height:226px;flex-direction:column;padding:22px 22px 18px;border:1px solid #d5dfe5;border-top:4px solid #071e3b;background:#fff;box-shadow:0 8px 20px rgba(8,42,73,.045)}.ws400-intent .scenario:hover{border-color:#a9bbc6;box-shadow:0 14px 28px rgba(8,42,73,.1)}.ws400-intent .scenario small{color:#9b7008;font-size:10px;font-weight:900;letter-spacing:.1em}.ws400-intent .scenario h3{margin:10px 0 8px;color:#071e3b;font-size:20px;font-weight:800;line-height:1.2}.ws400-intent .scenario p{margin:0;color:#637789;font-size:13px;line-height:1.6}.ws400-intent .scenario a{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:15px;color:#173f61;font-size:13px;font-weight:800;text-decoration:none}.ws400-intent .scenario a:hover{color:#a17408}.ws400-intent .scenario a b{font-size:18px;line-height:1}
@media(max-width:900px){.ws400-intent{padding:42px 0 46px}.ws400-intent-head{align-items:start;flex-direction:column;gap:11px}.ws400-intent-head p{max-width:620px}.ws400-intent .scenarios{grid-template-columns:1fr}.ws400-intent .scenario{min-height:0}}
@media(max-width:560px){.ws400-intent{padding:36px 0 40px}.ws400-intent-head h2{font-size:28px}.ws400-intent-head p{font-size:12px}.ws400-intent .scenarios{gap:12px}.ws400-intent .scenario{padding:19px 18px 16px}.ws400-intent .scenario h3{margin:8px 0 7px;font-size:18px}.ws400-intent .scenario p{font-size:12px}.ws400-intent .scenario a{padding-top:13px;font-size:12px}}

/* Keep in-page anchor targets clear of the sticky site header. */
.ws400-page #tong-quan,.ws400-page #chon-nhu-cau,.ws400-page #hinh-anh,.ws400-page #thong-so,.ws400-page #phu-hop,.ws400-page #so-luong,.ws400-page #bao-gia,.ws400-page #faq,.ws400-page #kiem-tra-thay-the{scroll-margin-top:92px}
@media(max-width:560px){.ws400-page #tong-quan,.ws400-page #chon-nhu-cau,.ws400-page #hinh-anh,.ws400-page #thong-so,.ws400-page #phu-hop,.ws400-page #so-luong,.ws400-page #bao-gia,.ws400-page #faq,.ws400-page #kiem-tra-thay-the{scroll-margin-top:76px}}

/* WS-400 professional conversion polish: hierarchy, decision routes and consultation form. */
.ws400-page .dhero h1{font-size:clamp(48px,4.4vw,60px);line-height:1.04}.ws400-page .dhero .lead{max-width:600px;margin-top:18px;font-size:16px;line-height:1.67}.ws400-page .dhero .acts{margin-top:25px}.ws400-page .dhero .acts .btn{min-height:50px}.ws400-page .sec{padding:70px 0}.ws400-page .sh{margin-bottom:26px}.ws400-page .sh h2{font-size:clamp(34px,3.35vw,42px);line-height:1.11}.ws400-page .sh p{max-width:710px;font-size:15px;line-height:1.7}.ws400-page .table .row b{font-size:12px}.ws400-page .table .row span{font-size:14px;line-height:1.55}.ws400-page .aside h3{font-size:23px}.ws400-page .aside p{font-size:14px;line-height:1.65}.ws400-page .ws400-visual-check{padding:70px 0}.ws400-page .ws400-visual-head h2,.ws400-page .ws400-sizing-intro h2,.ws400-page .ws400-faq-head h2{font-size:clamp(34px,3.35vw,42px);line-height:1.11}.ws400-page .ws400-visual-head p,.ws400-page .ws400-faq-head p{font-size:15px;line-height:1.68}.ws400-page .ws400-sizing{padding:70px 0}.ws400-page .ws400-sizing-intro>p{font-size:15px;line-height:1.7}.ws400-page .ws400-faq{padding:70px 0}.ws400-page .ws400-faq-list summary{font-size:15px}.ws400-page .ws400-faq-list details p{font-size:14px;line-height:1.7}

/* The entire route card is a visible, accessible tap/click target. */
.ws400-intent{padding:50px 0;background:#fff}.ws400-intent-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(320px,.58fr);gap:42px;align-items:end;margin-bottom:22px}.ws400-intent-head small{display:block;margin-bottom:9px;color:#a17408;font-size:11px;font-weight:900;letter-spacing:.13em}.ws400-intent-head h2{margin:0;color:#071e3b;font-size:clamp(34px,3.15vw,42px);font-weight:700;line-height:1.1;letter-spacing:-.04em}.ws400-intent-head p{max-width:465px;margin:0 0 2px;color:#637789;font-size:14px;line-height:1.67}.ws400-route-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.ws400-route-card{display:flex;min-height:242px;flex-direction:column;padding:23px 22px 19px;border:1px solid #d5dfe5;border-top:4px solid #071e3b;background:#fff;color:#101b2b;text-decoration:none;box-shadow:0 8px 20px rgba(8,42,73,.045);transition:transform .2s,box-shadow .2s,border-color .2s}.ws400-route-card:hover{border-color:#a17408;transform:translateY(-3px);box-shadow:0 16px 30px rgba(8,42,73,.12)}.ws400-route-card:focus-visible{outline:3px solid rgba(244,185,31,.55);outline-offset:3px}.ws400-route-label{display:block;color:#9b7008;font-size:10px;font-weight:900;letter-spacing:.1em}.ws400-route-card h3{margin:10px 0 8px;color:#071e3b;font-size:20px;font-weight:800;line-height:1.2}.ws400-route-card p{margin:0;color:#637789;font-size:14px;line-height:1.6}.ws400-route-action{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:16px;color:#173f61;font-size:13px;font-weight:800}.ws400-route-card:hover .ws400-route-action{color:#a17408}.ws400-route-action b{font-size:18px;line-height:1}

/* Grouped fields make the quote form readable before a visitor starts typing. */
.ws400-page .band{padding:52px 0 55px}.ws400-page .band h2{max-width:700px;font-size:clamp(30px,3vw,40px);line-height:1.12}.ws400-page .band p{font-size:15px;line-height:1.68}.ws400-quote-form{display:grid;grid-template-columns:1fr;gap:19px;margin-top:28px}.ws400-form-section{display:grid;gap:9px}.ws400-form-group-title{margin:0;color:#f4b91f;font-size:10px;font-weight:900;letter-spacing:.12em}.ws400-form-group-title span{color:#a9c1d7}.ws400-form-fields{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.ws400-field{display:grid;gap:7px;min-width:0;color:#e7f0f5;font-size:12px;font-weight:700;line-height:1.35}.ws400-field span{display:flex;align-items:center;justify-content:space-between;gap:10px}.ws400-field em{color:#f4b91f;font-size:10px;font-style:normal;font-weight:800;letter-spacing:.04em}.ws400-field-wide{grid-column:1/-1}.ws400-quote-form input,.ws400-quote-form select,.ws400-quote-form textarea{min-height:48px;border:1px solid #cfdde5;border-radius:0;color:#101b2b;font-size:14px;line-height:1.45}.ws400-quote-form input::placeholder,.ws400-quote-form textarea::placeholder{color:#738795}.ws400-quote-form textarea{min-height:102px;resize:vertical}.ws400-quote-form input:focus,.ws400-quote-form select:focus,.ws400-quote-form textarea:focus{outline:3px solid rgba(244,185,31,.28);border-color:#f4b91f}.ws400-form-helper{margin:0;color:#c4d2dd!important;font-size:13px!important;line-height:1.65!important}.ws400-quote-form>.btn{min-height:54px;font-size:14px}
@media(max-width:900px){.ws400-intent-head{grid-template-columns:1fr;gap:12px}.ws400-intent-head p{max-width:650px}.ws400-route-grid{grid-template-columns:1fr}.ws400-route-card{min-height:0}.ws400-page .dhero h1{font-size:clamp(46px,7.5vw,56px)}}
@media(max-width:560px){.ws400-page .dhero h1{font-size:41px}.ws400-page .dhero .lead{font-size:15px;line-height:1.62}.ws400-page .dhero .acts{margin-top:21px}.ws400-page .dhero .acts .btn{width:100%;min-height:50px}.ws400-page .sec,.ws400-page .ws400-visual-check,.ws400-page .ws400-sizing,.ws400-page .ws400-faq{padding:50px 0}.ws400-page .sh h2,.ws400-page .ws400-visual-head h2,.ws400-page .ws400-sizing-intro h2,.ws400-page .ws400-faq-head h2,.ws400-intent-head h2{font-size:30px;line-height:1.13}.ws400-page .sh p,.ws400-page .ws400-visual-head p,.ws400-page .ws400-faq-head p,.ws400-page .ws400-sizing-intro>p{font-size:14px;line-height:1.65}.ws400-intent{padding:42px 0}.ws400-intent-head{gap:11px;margin-bottom:18px}.ws400-intent-head p{font-size:13px;line-height:1.62}.ws400-route-grid{gap:12px}.ws400-route-card{padding:19px 18px 16px}.ws400-route-card h3{margin:8px 0 7px;font-size:18px}.ws400-route-card p{font-size:13px}.ws400-route-action{padding-top:14px;font-size:12px}.ws400-page .band{padding:47px 0 50px}.ws400-page .band h2{font-size:29px}.ws400-page .band p{font-size:14px}.ws400-quote-form{gap:17px;margin-top:24px}.ws400-form-fields{grid-template-columns:1fr;gap:12px}.ws400-field-wide{grid-column:auto}.ws400-field{font-size:12px}.ws400-quote-form input,.ws400-quote-form select,.ws400-quote-form textarea{font-size:14px}.ws400-form-helper{font-size:12px!important}.ws400-quote-form>.btn{font-size:13px}}

/* Approved WS-400 multi-view hero artwork: present the image cleanly, without a second visual overlay. */
.ws400-page .dhero .dart.ws400-hero-multiview{border-color:#1974be;background:#031a31;box-shadow:0 32px 76px rgba(0,8,22,.56)}.ws400-page .dhero .dart.ws400-hero-multiview:before,.ws400-page .dhero .dart.ws400-hero-multiview:after{display:none}.ws400-page .dhero .dart.ws400-hero-multiview img{position:absolute;inset:0;display:block;width:100%;height:100%;padding:0;object-fit:cover;object-position:center;mix-blend-mode:normal;opacity:1;filter:none;transform:none}

/* Bright three-view catalogue reference in the product-recognition block. */
.ws400-feature-photo.ws400-feature-multiview{min-height:0;aspect-ratio:1/1;border-color:rgba(10,49,82,.12);background:#edf2f6;box-shadow:0 18px 42px rgba(8,42,73,.1)}.ws400-feature-photo.ws400-feature-multiview:before,.ws400-feature-photo.ws400-feature-multiview:after{display:none}.ws400-feature-photo.ws400-feature-multiview img{position:absolute;inset:0;display:block;width:100%;height:100%;padding:0;object-fit:contain;object-position:center;mix-blend-mode:normal;opacity:1;filter:none;transform:none}.ws400-feature-photo.ws400-feature-multiview figcaption{display:none}
@media(max-width:560px){.ws400-feature-photo.ws400-feature-multiview{aspect-ratio:1/1}}

/* Product imagery stays unobstructed: do not overlay the legacy QM mark on hero visuals. */
.ws400-hero-brand{display:none!important}

/* Compact square-fan thumbnails: cropped asset, edge-to-edge framing and no spare color band. */
.fan-model-image.fan-small-square-thumb,.card .pic.fan-small-square-thumb{height:auto;aspect-ratio:1/1;background:#eef1f3}.fan-model-image.fan-small-square-thumb img,.card .pic.fan-small-square-thumb img{width:100%;height:100%;padding:0;object-fit:cover;object-position:center}
@media(max-width:560px){.fan-model-image.fan-small-square-thumb,.card .pic.fan-small-square-thumb{aspect-ratio:1/1}}

/* Square-fan category landing page: decision-first CRO, consistent catalogue cards and mobile-safe conversion surfaces. */
.ws-cat-page{background:#fff}.ws-cat-page .hero{padding-bottom:66px}.ws-cat-page .hero .lead{max-width:620px}.ws-cat-hero-points{display:grid;grid-template-columns:1fr 1fr;gap:10px 22px;margin:23px 0 0}.ws-cat-hero-points span{position:relative;display:block;min-height:54px;padding:0 0 0 14px;border-left:3px solid #f4b91f;color:#d7e2eb;font-size:12px;line-height:1.5}.ws-cat-hero-points b{display:block;margin-bottom:2px;color:#fff;font-size:12px}.ws-cat-hero-points span:last-child{grid-column:1/-1;max-width:610px}.ws-cat-section-head{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(300px,.68fr);gap:54px;align-items:end;margin-bottom:28px}.ws-cat-section-head small{display:block;margin-bottom:9px;color:#a17408;font-size:11px;font-weight:900;letter-spacing:.13em}.ws-cat-section-head h2{max-width:710px;margin:0;color:#071e3b;font-size:clamp(34px,3.45vw,46px);font-weight:700;line-height:1.1;letter-spacing:-.045em}.ws-cat-section-head>p{max-width:470px;margin:0 0 3px;color:#637789;font-size:14px;line-height:1.72}.ws-cat-decision{padding:66px 0 70px;background:#fff}.ws-cat-decision-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.ws-cat-decision-card{display:flex;min-height:246px;flex-direction:column;padding:24px 23px 20px;border:1px solid #d5dfe5;border-top:4px solid #071e3b;background:#fff;color:#071e3b;text-decoration:none;box-shadow:0 8px 20px rgba(8,42,73,.045);transition:transform .2s,box-shadow .2s,border-color .2s}.ws-cat-decision-card:hover{border-color:#a17408;transform:translateY(-3px);box-shadow:0 18px 34px rgba(8,42,73,.12)}.ws-cat-decision-card:focus-visible{outline:3px solid rgba(244,185,31,.55);outline-offset:3px}.ws-cat-decision-card>span{color:#9b7008;font-size:10px;font-weight:900;letter-spacing:.11em}.ws-cat-decision-card h3{margin:11px 0 8px;font-size:21px;font-weight:800;line-height:1.18}.ws-cat-decision-card p{margin:0;color:#637789;font-size:13px;line-height:1.62}.ws-cat-decision-card>b{display:flex;align-items:center;justify-content:space-between;margin-top:auto;padding-top:16px;color:#173f61;font-size:13px}.ws-cat-decision-card i{font-size:19px;font-style:normal}.ws-cat-model-section{padding-top:71px!important}.ws-cat-model-head{margin-bottom:23px}.ws-cat-finder{margin:0 0 27px;padding:20px 22px;border:1px solid #d5dfe5;border-top:4px solid #071e3b;background:#f8fafb}.ws-cat-finder-intro{display:flex;align-items:baseline;gap:13px;margin-bottom:13px}.ws-cat-finder-intro b{color:#9b7008;font-size:10px;letter-spacing:.12em}.ws-cat-finder-intro span{color:#637789;font-size:13px;line-height:1.5}.ws-cat-filter-row{display:flex;flex-wrap:wrap;gap:8px}.ws-cat-filter-row button{min-height:37px;padding:8px 13px;border:1px solid #cfdde5;background:#fff;color:#173f61;cursor:pointer;font:inherit;font-size:12px;font-weight:800;line-height:1.2;transition:border-color .18s,background .18s,color .18s}.ws-cat-filter-row button:hover,.ws-cat-filter-row button.is-active{border-color:#071e3b;background:#071e3b;color:#fff}.ws-cat-filter-row button small{margin-left:5px;color:inherit;font-size:10px}.ws-cat-voltage-row{align-items:center;margin-top:10px}.ws-cat-voltage-row>span{margin-right:2px;color:#637789;font-size:12px;font-weight:700}.ws-cat-filter-result{margin:14px 0 0;color:#637789;font-size:13px;line-height:1.55}.ws-cat-filter-result b{color:#071e3b}.ws-cat-filter-result a{color:#173f61;font-weight:800;text-decoration:none}.ws-cat-filter-result a:hover{color:#a17408}.ws-cat-model-grid{align-items:stretch}.ws-cat-model-card{position:relative;min-width:0;border-top:4px solid #071e3b}.ws-cat-model-card[hidden]{display:none}.ws-cat-model-card .pic{background:#eef1f3}.ws-cat-model-card .body{gap:9px;padding:18px}.ws-cat-model-card h3{min-height:48px;font-size:18px;line-height:1.24}.ws-cat-model-card .tag{display:block;color:#9b7008;font-size:10px;font-weight:900;letter-spacing:.095em}.ws-cat-card-size{min-height:20px!important;margin:0!important;color:#637789!important;font-size:12px!important;line-height:1.5!important}.ws-cat-card-size b{color:#173f61;font-weight:800}.ws-cat-model-card .meta{margin:3px 0 0}.ws-cat-model-card .meta span{padding:9px;background:#eef3f6}.ws-cat-model-card .meta small{display:block;color:#7b8e9d;font-size:8px;font-weight:900;letter-spacing:.07em}.ws-cat-model-card .meta b{margin-top:3px;color:#173f61;font-size:12px;line-height:1.3}.ws-cat-card-voltage{display:inline-flex;align-self:flex-start;margin-top:3px;padding:4px 7px;background:#f7ead0;color:#805c09;font-size:10px;font-weight:900;letter-spacing:.04em}.ws-cat-model-card .go{display:flex;align-items:center;justify-content:space-between;margin-top:4px;font-size:12px}.ws-cat-model-card .go b{font-size:18px;line-height:1}.ws-cat-fit{padding:74px 0;background:#f5f4ef}.ws-cat-fit-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.ws-cat-fit-card{padding:29px 31px;border:1px solid #d5dfe5;background:#fff}.ws-cat-fit-card small{display:block;margin-bottom:10px;color:#9b7008;font-size:10px;font-weight:900;letter-spacing:.12em}.ws-cat-fit-card h3{margin:0;color:#071e3b;font-size:25px;line-height:1.2}.ws-cat-fit-card ul{display:grid;gap:11px;margin:19px 0 0;padding:0;list-style:none;color:#637789;font-size:14px;line-height:1.58}.ws-cat-fit-card li{position:relative;padding-left:20px}.ws-cat-fit-card.is-good li:before{position:absolute;left:0;content:'✓';color:#a17408;font-weight:900}.ws-cat-fit-card.is-check{border-top:4px solid #f4b91f}.ws-cat-fit-card.is-check li:before{position:absolute;left:0;content:'–';color:#a17408;font-weight:900}.ws-cat-sizing{padding:76px 0;background:#fff}.ws-cat-sizing-grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(420px,1.1fr);gap:66px;align-items:center}.ws-cat-sizing small{display:block;margin-bottom:10px;color:#a17408;font-size:11px;font-weight:900;letter-spacing:.13em}.ws-cat-sizing h2{max-width:600px;margin:0;color:#071e3b;font-size:clamp(35px,3.6vw,49px);font-weight:700;line-height:1.08;letter-spacing:-.045em}.ws-cat-sizing>div>div>p{max-width:545px;margin:20px 0 26px;color:#637789;font-size:15px;line-height:1.74}.ws-cat-inline-cta{display:inline-flex;align-items:center;justify-content:space-between;gap:17px;min-height:51px;padding:15px 19px;background:#f4b91f;color:#071e3b;font-size:14px;font-weight:800;text-decoration:none}.ws-cat-inline-cta:hover{background:#ffca34}.ws-cat-inline-cta b{font-size:19px}.ws-cat-sizing-card{padding:29px 32px 25px;border-top:4px solid #f4b91f;background:#071e3b;box-shadow:0 18px 42px rgba(8,42,73,.14)}.ws-cat-sizing-card>p{margin:0 0 13px!important;color:#f4b91f!important;font-size:10px!important;font-weight:900!important;letter-spacing:.12em}.ws-cat-sizing-card ol{display:grid;margin:0;padding:0;list-style:none}.ws-cat-sizing-card li{display:grid;grid-template-columns:31px 1fr;gap:10px;padding:12px 0;border-top:1px solid rgba(255,255,255,.18)}.ws-cat-sizing-card li>b{color:#f4b91f;font-size:11px;line-height:1.55}.ws-cat-sizing-card li span{display:grid;gap:2px;color:#dce7ee;font-size:13px;line-height:1.48}.ws-cat-sizing-card li strong{color:#fff;font-size:14px}.ws-cat-sizing-card em{display:block;margin-top:17px;padding-top:15px;border-top:1px solid rgba(255,255,255,.18);color:#a9c1d7;font-size:12px;font-style:italic;line-height:1.6}.ws-cat-quote{padding:55px 0 58px}.ws-cat-quote-form{display:grid;gap:19px;margin-top:29px}.ws-cat-form-section{display:grid;gap:9px}.ws-cat-form-section>p{margin:0;color:#f4b91f;font-size:10px;font-weight:900;letter-spacing:.12em}.ws-cat-form-section>p span{color:#a9c1d7}.ws-cat-form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.ws-cat-form-grid label{display:grid;gap:7px;min-width:0;color:#e7f0f5;font-size:12px;font-weight:700;line-height:1.35}.ws-cat-form-grid label.wide{grid-column:1/-1}.ws-cat-form-grid label em{color:#f4b91f;font-size:10px;font-style:normal;letter-spacing:.04em}.ws-cat-form-grid input,.ws-cat-form-grid select,.ws-cat-form-grid textarea{min-height:48px;border:1px solid #cfdde5;border-radius:0;color:#101b2b;font:inherit;font-size:14px;line-height:1.45}.ws-cat-form-grid textarea{min-height:102px;resize:vertical}.ws-cat-form-grid input:focus,.ws-cat-form-grid select:focus,.ws-cat-form-grid textarea:focus{outline:3px solid rgba(244,185,31,.28);border-color:#f4b91f}.ws-cat-form-note{margin:0!important;color:#c4d2dd!important;font-size:13px!important;line-height:1.65!important}.ws-cat-quote-form>.btn{justify-self:start;min-height:54px;font-size:14px}.ws-cat-faq{padding-top:75px!important;padding-bottom:76px!important}.ws-cat-faq-list{border-top:1px solid #d5dfe5}.ws-cat-faq-list details{border:0;border-bottom:1px solid #d5dfe5;background:#fff}.ws-cat-faq-list summary{display:grid;grid-template-columns:38px 1fr 20px;gap:13px;align-items:center;padding:19px 21px;cursor:pointer;list-style:none;color:#071e3b;font-size:16px;font-weight:800;line-height:1.45}.ws-cat-faq-list summary::-webkit-details-marker{display:none}.ws-cat-faq-list summary span{color:#a17408;font-size:10px;font-weight:900;letter-spacing:.08em}.ws-cat-faq-list summary>b{justify-self:end;color:#a17408;font-size:24px;font-weight:400;line-height:1;transition:transform .18s}.ws-cat-faq-list details[open] summary{background:#f8fafb}.ws-cat-faq-list details[open] summary>b{transform:rotate(45deg)}.ws-cat-faq-list details>div{padding:0 59px 21px}.ws-cat-faq-list details p{max-width:860px;margin:0;color:#637789;font-size:14px;line-height:1.75}.ws-cat-page #tong-quan,.ws-cat-page #chon-nhu-cau,.ws-cat-page #model,.ws-cat-page #phu-hop,.ws-cat-page #so-luong,.ws-cat-page #bao-gia,.ws-cat-page #faq{scroll-margin-top:92px}
@media(max-width:900px){.ws-cat-page .hero{padding-bottom:57px}.ws-cat-section-head,.ws-cat-sizing-grid{grid-template-columns:1fr;gap:20px}.ws-cat-section-head>p{max-width:650px}.ws-cat-decision{padding:54px 0 58px}.ws-cat-decision-grid{grid-template-columns:1fr}.ws-cat-decision-card{min-height:0}.ws-cat-fit{padding:60px 0}.ws-cat-sizing{padding:61px 0}.ws-cat-sizing-card{max-width:680px}.ws-cat-quote-form{max-width:760px}.ws-cat-faq{padding-top:60px!important;padding-bottom:61px!important}}
@media(max-width:680px){.ws-cat-hero-points{grid-template-columns:1fr;gap:12px}.ws-cat-hero-points span:last-child{grid-column:auto}.ws-cat-model-section{padding-top:53px!important}.ws-cat-finder{padding:18px}.ws-cat-finder-intro{display:grid;gap:4px}.ws-cat-filter-row{gap:7px}.ws-cat-filter-row button{padding:8px 10px;font-size:11px}.ws-cat-fit-grid{grid-template-columns:1fr}.ws-cat-fit-card{padding:24px 20px}.ws-cat-form-grid{grid-template-columns:1fr;gap:12px}.ws-cat-form-grid label.wide{grid-column:auto}.ws-cat-quote-form>.btn{width:100%;justify-content:center}.ws-cat-faq-list summary{grid-template-columns:28px 1fr 17px;gap:9px;padding:16px 15px;font-size:14px}.ws-cat-faq-list details>div{padding:0 15px 17px 52px}.ws-cat-faq-list details p{font-size:13px;line-height:1.68}}
@media(max-width:560px){.ws-cat-page .hero .lead{font-size:15px;line-height:1.62}.ws-cat-hero-points{margin-top:19px}.ws-cat-hero-points span{font-size:11px}.ws-cat-section-head{gap:12px;margin-bottom:21px}.ws-cat-section-head h2,.ws-cat-sizing h2{font-size:30px;line-height:1.13}.ws-cat-section-head>p{font-size:13px;line-height:1.65}.ws-cat-decision{padding:43px 0 46px}.ws-cat-decision-card{padding:20px 18px 17px}.ws-cat-decision-card h3{margin:8px 0 7px;font-size:19px}.ws-cat-decision-card p{font-size:12px}.ws-cat-fit{padding:52px 0}.ws-cat-fit-card h3{font-size:22px}.ws-cat-fit-card ul{font-size:13px}.ws-cat-sizing{padding:53px 0}.ws-cat-sizing>div>div>p{margin:15px 0 21px;font-size:13px;line-height:1.68}.ws-cat-sizing-card{padding:24px 20px 20px}.ws-cat-sizing-card li{grid-template-columns:27px 1fr;padding:11px 0}.ws-cat-sizing-card li span{font-size:12px}.ws-cat-sizing-card li strong{font-size:13px}.ws-cat-quote{padding:48px 0 51px}.ws-cat-faq{padding-top:52px!important;padding-bottom:53px!important}.ws-cat-page #tong-quan,.ws-cat-page #chon-nhu-cau,.ws-cat-page #model,.ws-cat-page #phu-hop,.ws-cat-page #so-luong,.ws-cat-page #bao-gia,.ws-cat-page #faq{scroll-margin-top:76px}}

/* Category page: keep quick-contact actions available without covering decision cards. */
@media(min-width:681px){.ws-cat-page~.qmfc-floating{right:12px;gap:8px}.ws-cat-page~.qmfc-floating>a{width:56px;min-height:56px;justify-content:center;padding:8px;border-radius:50%}.ws-cat-page~.qmfc-floating>a>span:last-child{display:none}.ws-cat-page~.qmfc-floating:hover>a{width:170px;justify-content:flex-start;border-radius:12px;padding:9px 13px}.ws-cat-page~.qmfc-floating:hover>a>span:last-child{display:block}}

/* Refined model finder: two-step input hierarchy and compact result surface. */
.ws-cat-model-head h2{max-width:680px;font-size:clamp(32px,3vw,42px);line-height:1.12}.ws-cat-model-head>p{max-width:480px;padding-left:16px;border-left:2px solid #f4b91f}.ws-cat-finder{margin:0 0 30px;padding:0;border:1px solid #d5dfe5;border-top:4px solid #071e3b;background:#fff;box-shadow:0 12px 28px rgba(8,42,73,.055)}.ws-cat-finder-head{display:grid;grid-template-columns:minmax(0,.95fr) minmax(330px,1.05fr);gap:28px;align-items:end;padding:23px 25px 20px;border-bottom:1px solid #d5dfe5;background:linear-gradient(110deg,#fff 0%,#f8fafb 100%)}.ws-cat-finder-head span{display:block;margin-bottom:7px;color:#9b7008;font-size:10px;font-weight:900;letter-spacing:.13em}.ws-cat-finder-head h3{margin:0;color:#071e3b;font-size:24px;font-weight:800;line-height:1.18;letter-spacing:-.025em}.ws-cat-finder-head p{max-width:560px;margin:0;color:#637789;font-size:13px;line-height:1.65}.ws-cat-finder-steps{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(300px,.65fr);gap:0}.ws-cat-finder-step{min-width:0;padding:20px 25px 22px}.ws-cat-finder-step+.ws-cat-finder-step{border-left:1px solid #d5dfe5}.ws-cat-finder-step-label{display:grid;grid-template-columns:28px minmax(0,1fr);gap:10px;align-items:start;margin-bottom:14px}.ws-cat-finder-step-label>b{display:grid;width:28px;height:28px;place-items:center;background:#f4b91f;color:#071e3b;font-size:10px;font-weight:900}.ws-cat-finder-step-label strong,.ws-cat-finder-step-label span{display:block}.ws-cat-finder-step-label strong{margin:1px 0 3px;color:#071e3b;font-size:14px;font-weight:800;line-height:1.35}.ws-cat-finder-step-label span{color:#637789;font-size:11px;line-height:1.52}.ws-cat-filter-row{gap:7px}.ws-cat-filter-row button{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:9px 12px;border:1px solid #cfdde5;background:#fff;color:#173f61;font-size:12px;font-weight:800;line-height:1.2;box-shadow:0 1px 0 rgba(8,42,73,.025)}.ws-cat-filter-row button:hover{border-color:#54718a;background:#f1f6f8;color:#071e3b}.ws-cat-filter-row button.is-active{border-color:#071e3b;background:#071e3b;color:#fff;box-shadow:none}.ws-cat-filter-row button:focus-visible{outline:3px solid rgba(244,185,31,.52);outline-offset:2px}.ws-cat-filter-row button small{margin-left:5px;font-size:9px;font-weight:800;opacity:.83}.ws-cat-finder-step-voltage .ws-cat-filter-row{display:grid;grid-template-columns:repeat(3,minmax(0,1fr))}.ws-cat-finder-step-voltage .ws-cat-filter-row button{width:100%;padding-inline:8px}.ws-cat-filter-result{display:flex;align-items:center;justify-content:space-between;gap:18px;margin:0;padding:13px 25px;border-top:1px solid #d5dfe5;background:#f5f8fb;color:#637789;font-size:12px;line-height:1.5}.ws-cat-filter-result>div{display:flex;align-items:baseline;gap:5px}.ws-cat-filter-result b[data-model-count]{color:#071e3b;font-size:18px;font-weight:900;line-height:1}.ws-cat-filter-result a{display:inline-flex;align-items:center;gap:8px;color:#173f61;font-size:12px;font-weight:800;text-decoration:none}.ws-cat-filter-result a:hover{color:#9b7008}.ws-cat-filter-result a b{font-size:17px;line-height:1}@media(max-width:900px){.ws-cat-model-head h2{max-width:700px}.ws-cat-finder-head{grid-template-columns:1fr;gap:10px}.ws-cat-finder-head p{max-width:720px}.ws-cat-finder-steps{grid-template-columns:1fr}.ws-cat-finder-step+.ws-cat-finder-step{border-top:1px solid #d5dfe5;border-left:0}.ws-cat-finder-step-voltage .ws-cat-filter-row{display:flex}.ws-cat-finder-step-voltage .ws-cat-filter-row button{width:auto;padding-inline:12px}}@media(max-width:680px){.ws-cat-model-head>p{padding-left:12px}.ws-cat-finder{margin-bottom:24px}.ws-cat-finder-head{padding:20px 18px 17px}.ws-cat-finder-head h3{font-size:21px}.ws-cat-finder-head p{font-size:12px;line-height:1.62}.ws-cat-finder-step{padding:17px 18px 18px}.ws-cat-finder-step-label{margin-bottom:12px}.ws-cat-filter-row{gap:7px}.ws-cat-filter-row button{min-height:40px;padding:9px 10px;font-size:11px}.ws-cat-filter-result{align-items:flex-start;flex-direction:column;gap:8px;padding:13px 18px;font-size:12px}.ws-cat-filter-result a{min-height:35px;align-items:center}.ws-cat-filter-result>div{flex-wrap:wrap;row-gap:2px}}@media(max-width:420px){.ws-cat-finder-step-voltage .ws-cat-filter-row{display:grid;grid-template-columns:1fr 1fr}.ws-cat-finder-step-voltage .ws-cat-filter-row button:first-child{grid-column:1/-1;width:100%}}

/* Square-fan category hero: keyword clarity, two clear entry paths and low-friction conversion cues. */
.ws-cat-page .hero.ws-cat-hero{padding:42px 0 50px}.ws-cat-hero .crumb{margin-bottom:27px}.ws-cat-hero .hgrid{grid-template-columns:minmax(0,1.02fr) minmax(440px,.98fr);gap:54px}.ws-cat-hero h1{max-width:730px;margin-bottom:17px;font-size:clamp(47px,4.5vw,61px);line-height:1.06;letter-spacing:-.052em}.ws-cat-hero .lead{max-width:665px;color:#dce8ef;font-size:17px;line-height:1.66}.ws-cat-hero-paths{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:23px 0 14px}.ws-cat-hero-paths a{display:grid;min-height:82px;align-content:center;gap:5px;padding:13px 15px;border:1px solid rgba(255,255,255,.29);border-left:4px solid #f4b91f;background:rgba(4,27,50,.32);color:#fff;text-decoration:none;transition:transform .18s,background .18s,border-color .18s}.ws-cat-hero-paths a:first-child{border-color:#f4b91f;background:#f4b91f;color:#071e3b}.ws-cat-hero-paths a:hover{transform:translateY(-2px);border-color:#ffd55a;background:#123e61}.ws-cat-hero-paths a:first-child:hover{background:#ffca34}.ws-cat-hero-paths span{font-size:9px;font-weight:900;letter-spacing:.105em}.ws-cat-hero-paths strong{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px;font-weight:800;line-height:1.35}.ws-cat-hero-paths strong b{font-size:18px;line-height:1}.ws-cat-hero-safety{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 12px}.ws-cat-hero-safety span{padding:5px 8px;border:1px solid rgba(255,255,255,.19);color:#d7e4eb;font-size:10px;font-weight:700;line-height:1.35}.ws-cat-hero-safety span:before{content:'✓';margin-right:5px;color:#f4b91f;font-weight:900}.ws-cat-hero-note{max-width:670px;margin:0 0 19px;padding-left:11px;border-left:2px solid #f4b91f;color:#cbd9e3;font-size:12px;line-height:1.58}.ws-cat-hero-note b{color:#fff}.ws-cat-hero .acts{gap:10px}.ws-cat-hero .acts .btn{min-height:49px;padding:12px 16px}.ws-cat-hero .art{min-height:0;aspect-ratio:1/1;border-color:rgba(255,255,255,.38);background:linear-gradient(145deg,#fbfdfe 0%,#e8f1f5 100%);box-shadow:0 28px 58px rgba(0,14,31,.34)}.ws-cat-hero .art img{padding:8px;object-fit:contain}.ws-cat-hero .art small{display:none}@media(max-width:900px){.ws-cat-page .hero.ws-cat-hero{padding-bottom:49px}.ws-cat-hero .hgrid{grid-template-columns:1fr;gap:31px}.ws-cat-hero .art{max-width:620px;width:100%;justify-self:start}.ws-cat-hero h1{max-width:760px}}@media(max-width:560px){.ws-cat-page .hero.ws-cat-hero{padding:29px 0 41px}.ws-cat-hero .crumb{margin-bottom:19px}.ws-cat-hero h1{margin-bottom:13px;font-size:39px;line-height:1.09;letter-spacing:-.045em}.ws-cat-hero .lead{font-size:15px;line-height:1.62}.ws-cat-hero-paths{grid-template-columns:1fr;gap:8px;margin:20px 0 12px}.ws-cat-hero-paths a{min-height:68px;padding:11px 13px}.ws-cat-hero-paths strong{font-size:12px}.ws-cat-hero-safety{gap:5px}.ws-cat-hero-safety span{font-size:9px}.ws-cat-hero-note{margin-bottom:17px;font-size:11px}.ws-cat-hero .acts .btn{width:100%;min-height:49px}.ws-cat-hero .art{max-width:none}.ws-cat-hero .art img{padding:5px}}

/* Category refinement: preserve one primary hero action, speed up model scanning and support technical comparison. */
.ws-cat-hero .ws-cat-hero-safety{margin:22px 0 12px}.ws-cat-hero .ws-cat-hero-note{margin-bottom:20px}.ws-cat-hero .acts{margin-top:0}.ws-cat-size-jumps{display:flex;flex-wrap:wrap;align-items:center;gap:7px;margin:-4px 0 22px}.ws-cat-size-jumps>span{margin-right:3px;color:#637789;font-size:11px;font-weight:800}.ws-cat-size-jumps a{display:inline-flex;align-items:center;justify-content:center;min-width:42px;min-height:34px;padding:6px 9px;border:1px solid #cfdde5;background:#fff;color:#173f61;font-size:11px;font-weight:900;text-decoration:none}.ws-cat-size-jumps a:hover,.ws-cat-size-jumps a:focus-visible{border-color:#071e3b;background:#071e3b;color:#fff}.ws-cat-size-jumps a:focus-visible{outline:3px solid rgba(244,185,31,.45);outline-offset:2px}.ws-cat-model-card .body{gap:8px}.ws-cat-model-card .tag{min-height:22px;color:#071e3b;font-size:13px;font-weight:900;letter-spacing:.015em;line-height:1.35}.ws-cat-model-card h3{min-height:39px;color:#274a66;font-size:15px;font-weight:700;line-height:1.3}.ws-cat-model-card .ws-cat-card-size{min-height:19px!important;color:#637789!important;font-size:12px!important}.ws-cat-model-card .ws-cat-card-size b{color:#071e3b;font-weight:900}.ws-cat-compare{margin:52px 0 3px;padding:29px 30px 31px;border-top:4px solid #071e3b;background:#f8fafb}.ws-cat-compare-head{display:grid;grid-template-columns:minmax(0,1fr) minmax(290px,.72fr);gap:34px;align-items:end;margin-bottom:20px}.ws-cat-compare small{display:block;margin-bottom:7px;color:#9b7008;font-size:10px;font-weight:900;letter-spacing:.12em}.ws-cat-compare h3{margin:0;color:#071e3b;font-size:25px;font-weight:800;line-height:1.2;letter-spacing:-.025em}.ws-cat-compare p{max-width:480px;margin:0;color:#637789;font-size:13px;line-height:1.65}.ws-cat-compare-scroll{overflow:auto;border:1px solid #d5dfe5;background:#fff}.ws-cat-compare table{width:100%;min-width:760px;border-collapse:collapse;text-align:left}.ws-cat-compare th,.ws-cat-compare td{padding:13px 15px;border-bottom:1px solid #d5dfe5;font-size:12px;line-height:1.4;white-space:nowrap}.ws-cat-compare thead th{background:#071e3b;color:#fff;font-size:10px;font-weight:900;letter-spacing:.07em}.ws-cat-compare tbody th{color:#071e3b;font-size:12px;font-weight:900}.ws-cat-compare tbody td{color:#526b7c}.ws-cat-compare tbody tr:last-child th,.ws-cat-compare tbody tr:last-child td{border-bottom:0}.ws-cat-compare tbody tr:hover{background:#f5f8fb}.ws-cat-compare-scroll:focus-visible{outline:3px solid rgba(244,185,31,.5);outline-offset:3px}@media(max-width:900px){.ws-cat-compare-head{grid-template-columns:1fr;gap:11px}.ws-cat-compare p{max-width:690px}}@media(max-width:680px){.ws-cat-size-jumps{gap:6px;margin:0 0 19px}.ws-cat-size-jumps>span{width:100%;margin:0 0 1px}.ws-cat-size-jumps a{min-width:39px;min-height:34px;padding:6px 8px;font-size:10px}.ws-cat-model-card .tag{font-size:12px}.ws-cat-model-card h3{min-height:0;font-size:14px}.ws-cat-compare{margin-top:39px;padding:24px 18px 23px}.ws-cat-compare h3{font-size:21px}.ws-cat-compare p{font-size:12px}.ws-cat-compare th,.ws-cat-compare td{padding:12px;font-size:11px}}

/* Match the parent-category action treatment: a clear full-width gold configuration CTA at the foot of every model card. */
.ws-cat-model-card .go{width:calc(100% + 36px);min-height:48px;margin:9px -18px -18px!important;padding:12px 14px!important;background:#f4b91f;color:#071e3b!important;font-size:12px!important;font-weight:900!important;transition:background .18s,color .18s}.ws-cat-model-card:hover .go{background:#ffca34;color:#071e3b}.ws-cat-model-card .go b{color:inherit;font-size:19px!important;line-height:1}.ws-cat-model-card:focus-visible .go{background:#ffca34}@media(max-width:560px){.ws-cat-model-card .go{width:calc(100% + 28px);margin:9px -14px -14px!important;min-height:46px;padding:11px 12px!important;font-size:11px!important}}

/* Multi-view hero product board: edge-to-edge square artwork with the same navy technical language as the landing page. */
.ws-cat-hero .art.ws-cat-hero-multiview{border-color:rgba(37,137,233,.72);background:#05264a;box-shadow:0 30px 64px rgba(0,10,27,.42)}.ws-cat-hero .art.ws-cat-hero-multiview img{padding:0;object-fit:cover;object-position:center}

/* Quote form refinement: one clear submit action, Zalo as a secondary fast path, and optional technical detail fields. */
.ws-cat-quote{padding:52px 0 58px}.ws-cat-quote .bandgrid{align-items:center}.ws-cat-quote .bandgrid>div:first-child{max-width:790px}.ws-cat-quote .bandgrid h2{max-width:760px;margin:7px 0 10px;font-size:clamp(38px,3.55vw,46px);font-weight:700;line-height:1.12;letter-spacing:-.042em}.ws-cat-quote .bandgrid>div:first-child>p:last-child{max-width:735px;font-size:15px;line-height:1.65}.ws-cat-zalo-link{display:inline-flex;min-height:50px;align-items:center;justify-content:center;gap:9px;padding:13px 16px;border:1px solid rgba(244,185,31,.8);color:#f7c642;font-size:13px;font-weight:800;line-height:1.25;text-decoration:none;white-space:nowrap;transition:background .18s,color .18s,border-color .18s}.ws-cat-zalo-link>span{display:none}.ws-cat-zalo-link b{font-size:17px;line-height:1}.ws-cat-zalo-link:hover{border-color:#f4b91f;background:#f4b91f;color:#071e3b}.ws-cat-quote-form{max-width:1040px;gap:20px;margin-top:31px}.ws-cat-form-required{margin:0!important;color:#b9cad6!important;font-size:11px!important;font-weight:600;line-height:1.4!important}.ws-cat-form-required b{margin-right:4px;color:#f4b91f;font-size:14px}.ws-cat-form-section{gap:10px}.ws-cat-form-section>p,.ws-cat-site-details-body>p{margin:0;color:#f4b91f;font-size:10px;font-weight:900;letter-spacing:.12em}.ws-cat-form-section>p span,.ws-cat-site-details-body>p span{color:#a9c1d7}.ws-cat-form-grid{gap:16px}.ws-cat-form-grid label{gap:7px;color:#e7f0f5;font-size:12px;font-weight:700}.ws-cat-form-grid label>span{display:block;min-height:17px}.ws-cat-form-grid label em{margin-left:3px;color:#f4b91f;font-size:13px;font-style:normal;font-weight:900}.ws-cat-form-grid input,.ws-cat-form-grid select,.ws-cat-form-grid textarea{min-height:52px;padding:13px 14px;border-color:#cfdde5;font-size:14px}.ws-cat-form-grid textarea{min-height:106px}.ws-cat-site-details{border-top:1px solid rgba(255,255,255,.22);border-bottom:1px solid rgba(255,255,255,.22)}.ws-cat-site-details summary{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:center;min-height:58px;color:#fff;cursor:pointer;font-size:14px;font-weight:800;list-style:none}.ws-cat-site-details summary::-webkit-details-marker{display:none}.ws-cat-site-details summary span{color:#a9c1d7;font-size:12px;font-weight:600}.ws-cat-site-details summary>b{display:grid;width:27px;height:27px;place-items:center;border:1px solid rgba(244,185,31,.75);color:#f4b91f;font-size:19px;font-weight:400;line-height:1;transition:transform .18s}.ws-cat-site-details[open] summary>b{transform:rotate(45deg)}.ws-cat-site-details-body{padding:1px 0 21px}.ws-cat-site-details-body>p{margin-bottom:12px}.ws-cat-form-note{max-width:800px;margin:0!important;color:#c4d2dd!important;font-size:13px!important;line-height:1.65!important}.ws-cat-form-note strong{color:#fff}.ws-cat-quote-form>.btn{display:inline-flex;align-items:center;gap:13px;min-height:54px;padding:14px 19px}.ws-cat-quote-form>.btn b{font-size:19px;line-height:1}@media(max-width:900px){.ws-cat-quote .bandgrid{grid-template-columns:1fr;gap:17px}.ws-cat-zalo-link{justify-self:start}.ws-cat-quote-form{max-width:760px}}@media(max-width:560px){.ws-cat-quote{padding:46px 0 50px}.ws-cat-quote .bandgrid h2{font-size:30px;line-height:1.14}.ws-cat-quote .bandgrid>div:first-child>p:last-child{font-size:14px}.ws-cat-zalo-link{width:100%;min-height:48px}.ws-cat-zalo-link>span{display:inline;color:#a9c1d7;font-size:9px;font-weight:900;letter-spacing:.08em}.ws-cat-quote-form{gap:18px;margin-top:25px}.ws-cat-form-grid{gap:13px}.ws-cat-form-grid input,.ws-cat-form-grid select,.ws-cat-form-grid textarea{min-height:50px;font-size:14px}.ws-cat-form-grid textarea{min-height:100px}.ws-cat-site-details summary{min-height:55px;font-size:13px}.ws-cat-site-details summary span{font-size:11px}.ws-cat-site-details-body{padding-bottom:18px}.ws-cat-form-note{font-size:12px!important}.ws-cat-quote-form>.btn{width:100%;justify-content:center}}
.ws-cat-site-details summary>.ws-cat-site-details-title{color:#fff;font-size:14px;font-weight:800}.ws-cat-site-details summary>.ws-cat-site-details-title em{margin-left:5px;color:#a9c1d7;font-size:12px;font-style:normal;font-weight:600}@media(max-width:560px){.ws-cat-site-details summary>.ws-cat-site-details-title{font-size:13px}.ws-cat-site-details summary>.ws-cat-site-details-title em{font-size:11px}}

/* Final category refinements: semantic model shortcuts, progressive technical comparison and quieter floating contacts. */
.ws-cat-size-jumps{row-gap:8px}.ws-cat-size-jumps>span{flex-basis:100%;margin:0 0 1px}.ws-cat-size-jumps a{min-width:auto;padding:7px 10px;font-size:10px;letter-spacing:-.01em}.ws-cat-compare{margin:48px 0 3px;padding:0;border-top:4px solid #071e3b;background:#f8fafb}.ws-cat-compare-details{margin:0}.ws-cat-compare-details summary{display:grid;grid-template-columns:minmax(0,1fr) auto;column-gap:22px;align-items:center;min-height:92px;padding:20px 28px;cursor:pointer;list-style:none}.ws-cat-compare-details summary::-webkit-details-marker{display:none}.ws-cat-compare-details summary>span{display:grid;gap:5px;grid-column:1}.ws-cat-compare-details summary small{display:block;margin:0;color:#9b7008;font-size:10px;font-weight:900;letter-spacing:.12em}.ws-cat-compare-details summary strong{color:#071e3b;font-size:23px;font-weight:800;line-height:1.2;letter-spacing:-.025em}.ws-cat-compare-details summary>em{grid-column:1;margin-top:4px;color:#637789;font-size:12px;font-style:normal;line-height:1.5}.ws-cat-compare-details summary>b{display:grid;grid-column:2;grid-row:1/3;width:30px;height:30px;place-items:center;border:1px solid #a17408;color:#9b7008;font-size:21px;font-weight:400;line-height:1;transition:transform .18s}.ws-cat-compare-details[open] summary{border-bottom:1px solid #d5dfe5;background:#fff}.ws-cat-compare-details[open] summary>b{transform:rotate(45deg)}.ws-cat-compare-details-body{padding:22px 28px 29px}.ws-cat-compare-details-body>p{max-width:720px;margin:0 0 17px;color:#637789;font-size:13px;line-height:1.65}.ws-cat-compare-scroll{margin:0}.ws-cat-compare-details summary:focus-visible{outline:3px solid rgba(244,185,31,.5);outline-offset:-3px}@media(min-width:681px){.ws-cat-page~.qmfc-floating{right:8px;gap:7px}.ws-cat-page~.qmfc-floating>a{width:52px;min-height:52px}.ws-cat-page~.qmfc-floating:hover>a{width:162px;padding:8px 12px}}@media(max-width:680px){.ws-cat-size-jumps{gap:6px;margin:0 0 19px}.ws-cat-size-jumps a{min-height:36px;padding:7px 8px;font-size:9px}.ws-cat-compare{margin-top:38px}.ws-cat-compare-details summary{min-height:0;padding:19px 18px;column-gap:12px}.ws-cat-compare-details summary strong{font-size:19px}.ws-cat-compare-details summary>em{font-size:11px}.ws-cat-compare-details-body{padding:18px}.ws-cat-compare-details-body>p{font-size:12px}.ws-cat-compare-details summary>b{width:27px;height:27px;font-size:19px}}

/* Native details must remove hidden technical-table width from the page's mobile layout. */
.ws-cat-compare-details:not([open])>.ws-cat-compare-details-body,.ws-cat-site-details:not([open])>.ws-cat-site-details-body{display:none}@media(max-width:680px){.ws-cat-size-jumps a{min-height:40px}}

/* Mobile QA fixes: form controls must not widen their grid cell; the shared footer must stack without horizontal overflow. */
.ws-cat-form-grid input,.ws-cat-form-grid select,.ws-cat-form-grid textarea{box-sizing:border-box}@media(max-width:680px){.qmfc-footer .qmfc-container,.qmfc-footer .qmfc-business{grid-template-columns:1fr!important}.qmfc-footer .qmfc-container>*,.qmfc-footer .qmfc-business>*{min-width:0;width:100%;overflow-wrap:anywhere}.qmfc-footer h3,.qmfc-footer p,.qmfc-footer a{overflow-wrap:anywhere}}
@media(max-width:680px){.ws-cat-form-grid label,.ws-cat-form-grid label>span,.ws-cat-form-grid select{min-width:0;max-width:100%}.ws-cat-form-grid select{width:100%!important}}

/* Model-card information hierarchy: distinguish identity, dimensional fit and operating specifications at a glance. */
.ws-cat-model-card .body{gap:10px}.ws-cat-model-card .tag{min-height:auto;margin:0;color:#9b7008;font-size:10px;font-weight:900;letter-spacing:.1em;line-height:1.35}.ws-cat-model-card h3{min-height:40px;margin:0;color:#173f61;font-size:18px;font-weight:800;line-height:1.23;letter-spacing:-.02em}.ws-cat-model-card .ws-cat-card-size{display:grid;gap:3px;min-height:0!important;margin:1px 0 0!important;padding:10px 11px;border-left:3px solid #f4b91f;background:#f7fafb;color:#637789!important}.ws-cat-model-card .ws-cat-card-size small{color:#7b8e9d;font-size:8px;font-weight:900;letter-spacing:.08em}.ws-cat-model-card .ws-cat-card-size b{margin:0;color:#071e3b;font-size:12px;line-height:1.38}.ws-cat-model-card .meta{gap:7px;margin:0}.ws-cat-model-card .meta span{padding:9px 10px;background:#edf3f6}.ws-cat-model-card .meta small{font-size:8px}.ws-cat-model-card .meta b{margin-top:3px;color:#173f61;font-size:12px;font-weight:900}.ws-cat-model-card .ws-cat-card-voltage{display:flex;align-items:baseline;gap:7px;min-height:0;margin:0;padding:2px 0;background:transparent;color:#805c09}.ws-cat-model-card .ws-cat-card-voltage small{color:#7b8e9d;font-size:8px;font-weight:900;letter-spacing:.08em}.ws-cat-model-card .ws-cat-card-voltage b{color:#805c09;font-size:11px;font-weight:900;letter-spacing:.02em}@media(max-width:680px){.ws-cat-model-card h3{min-height:0;font-size:17px}.ws-cat-model-card .ws-cat-card-size{padding:9px 10px}.ws-cat-model-card .ws-cat-card-size b{font-size:12px}.ws-cat-model-card .meta span{padding:9px}.ws-cat-model-card .ws-cat-card-voltage{gap:6px}}

/* Compact fit check: body dimensions and voltage are paired in one scan line before performance data. */
.ws-cat-model-card .ws-cat-fit-specs{display:grid;grid-template-columns:minmax(0,1fr) minmax(112px,.46fr);gap:7px;align-items:stretch}.ws-cat-model-card .ws-cat-fit-specs .ws-cat-card-size{height:100%;margin:0!important}.ws-cat-model-card .ws-cat-fit-specs .ws-cat-card-voltage{display:grid;align-content:center;gap:3px;height:100%;margin:0;padding:10px;background:#fbf5e8;border-left:3px solid rgba(244,185,31,.62)}.ws-cat-model-card .ws-cat-fit-specs .ws-cat-card-voltage small{margin:0}.ws-cat-model-card .ws-cat-fit-specs .ws-cat-card-voltage b{font-size:11px;line-height:1.38}@media(max-width:390px){.ws-cat-model-card .ws-cat-fit-specs{grid-template-columns:minmax(0,1fr) minmax(99px,.43fr);gap:6px}.ws-cat-model-card .ws-cat-fit-specs .ws-cat-card-voltage{padding:9px 8px}.ws-cat-model-card .ws-cat-fit-specs .ws-cat-card-voltage b{font-size:10px}}

/* Tighten the title-to-spec rhythm without compressing the technical data panels. */
.ws-cat-model-card .body{gap:8px}.ws-cat-model-card h3{min-height:32px;margin-bottom:0}.ws-cat-model-card .ws-cat-fit-specs{margin-top:1px}

/* Use a consistent 2 × 2 technical-spec grid: every specification occupies one equal-width cell. */
.ws-cat-model-card .ws-cat-fit-specs{grid-template-columns:repeat(2,minmax(0,1fr))}@media(max-width:390px){.ws-cat-model-card .ws-cat-fit-specs{grid-template-columns:repeat(2,minmax(0,1fr))}.ws-cat-model-card .ws-cat-fit-specs .ws-cat-card-size b{font-size:11px}}

/* Keep the technical comparison visible: it is a core B2B decision tool. */
.ws-cat-compare {
  margin: 48px 0 3px;
  padding: 29px 30px 31px;
  border-top: 4px solid #071e3b;
  background: #f8fafb;
}

.ws-cat-compare-head {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(290px, 0.72fr);
  gap: 34px;
  align-items: end;
  margin-bottom: 20px;
}

.ws-cat-compare-head small {
  display: block;
  margin-bottom: 7px;
  color: #9b7008;
  font-size: 10px;
  font-weight: 900;
  letter-spacing: .12em;
}

.ws-cat-compare-head h3 {
  margin: 0;
  color: #071e3b;
  font-size: 25px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.025em;
}

.ws-cat-compare-head p {
  max-width: 480px;
  margin: 0;
  color: #637789;
  font-size: 13px;
  line-height: 1.65;
}

.ws-cat-compare-scroll {
  margin: 0;
}

@media (max-width: 900px) {
  .ws-cat-compare-head {
    grid-template-columns: 1fr;
    gap: 11px;
  }

  .ws-cat-compare-head p {
    max-width: 690px;
  }
}

@media (max-width: 680px) {
  .ws-cat-compare {
    margin-top: 38px;
    padding: 24px 18px 23px;
  }

  .ws-cat-compare-head {
    margin-bottom: 16px;
  }

  .ws-cat-compare-head h3 {
    font-size: 21px;
  }

  .ws-cat-compare-head p {
    font-size: 12px;
  }
}

/* Parent fan catalogue: mobile cards prioritize full product names and a clear next step. */
.fan-model-card .fan-detail-link {
  min-height: 50px;
}

@media (max-width: 560px) {
  .fan-parent-motor .fan-product-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .fan-parent-motor .fan-model-card {
    border-top-width: 4px;
  }

  .fan-parent-motor .fan-model-image.fan-small-square-thumb {
    aspect-ratio: 1 / 1;
    height: auto;
  }

  .fan-parent-motor .fan-model-copy {
    padding: 18px 18px 0;
  }

  .fan-parent-motor .fan-model-tag {
    margin-bottom: 9px;
    font-size: 11px;
    line-height: 1.35;
  }

  .fan-parent-motor .fan-model-card h3 {
    display: block;
    min-height: 0;
    margin: 0;
    overflow: visible;
    color: #071e3b;
    font-size: 22px;
    font-weight: 800;
    line-height: 1.22;
    letter-spacing: -.025em;
    -webkit-line-clamp: unset;
  }

  .fan-parent-motor .fan-model-specs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin: 17px 0 18px;
  }

  .fan-parent-motor .fan-model-specs span {
    min-height: 62px;
    padding: 11px 12px;
    border-right: 1px solid var(--l);
    border-bottom: 0;
  }

  .fan-parent-motor .fan-model-specs span:last-child {
    border-right: 0;
  }

  .fan-parent-motor .fan-model-specs small {
    font-size: 8px;
  }

  .fan-parent-motor .fan-model-specs b {
    margin-top: 5px;
    font-size: 13px;
    line-height: 1.35;
  }

  .fan-parent-motor .fan-model-card .fan-detail-link {
    min-height: 56px;
    margin: 0 -18px;
    padding: 15px 18px;
    font-size: 14px;
  }

  .fan-parent-motor .fan-model-card .fan-detail-link b {
    font-size: 21px;
  }
}