:root{--ink:#111318;--muted:#676b73;--line:#e6e7ea;--paper:#f7f7f4;--accent:#ff5a36;--blue:#3f66ff;--green:#31a56d;--max:1240px;--radius:22px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;color:var(--ink);background:#fff;line-height:1.55}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}.container{width:min(var(--max),calc(100% - 40px));margin:auto}.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.9);backdrop-filter:blur(16px);border-bottom:1px solid rgba(230,231,234,.8)}.nav-in{display:flex;align-items:center;justify-content:space-between;height:76px;gap:28px}.brand{display:flex;align-items:center;gap:11px;font-weight:850;letter-spacing:-.04em}.brand-mark{width:35px;height:35px;border-radius:11px;background:var(--ink);position:relative;overflow:hidden}.brand-mark:before,.brand-mark:after{content:"";position:absolute;height:5px;border-radius:6px;left:7px;right:7px;transform:rotate(-18deg)}.brand-mark:before{background:#fff;top:10px}.brand-mark:after{background:var(--accent);top:20px}.nav-links{display:flex;align-items:center;gap:24px;font-size:14px;font-weight:650}.nav-links a{color:#383b41}.nav-links a:hover{color:#000}.nav-cta,.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;padding:12px 18px;font-weight:750;border:1px solid var(--ink);cursor:pointer}.nav-cta{background:var(--ink);color:white}.btn.primary{background:var(--ink);color:#fff}.btn.secondary{background:#fff}.btn.ghost{border-color:var(--line);background:#fff}.mobile-toggle{display:none;border:0;background:none;font-size:22px}.eyebrow{text-transform:uppercase;font-size:12px;letter-spacing:.16em;font-weight:850;color:#5b5e65}.hero{padding:72px 0 56px;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;align-items:center;gap:54px}.hero h1{font-size:clamp(48px,6vw,82px);line-height:.97;letter-spacing:-.065em;margin:14px 0 24px;max-width:850px}.hero p{font-size:19px;color:var(--muted);max-width:690px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}.trust-row{display:flex;gap:24px;flex-wrap:wrap;margin-top:34px;font-size:13px;font-weight:700;color:#53565d}.trust-row span:before{content:"✓";margin-right:7px;color:var(--green)}.pen-scene{height:560px;border-radius:36px;background:linear-gradient(145deg,#eceee8,#faf3ea);position:relative;overflow:hidden;border:1px solid #ecebe7}.pen{position:absolute;width:430px;height:46px;border-radius:24px;background:#17191d;box-shadow:0 20px 44px rgba(0,0,0,.12);transform:rotate(-29deg)}.pen:before{content:"";position:absolute;right:-34px;top:8px;border-left:42px solid #17191d;border-top:15px solid transparent;border-bottom:15px solid transparent}.pen:after{content:"";position:absolute;left:42px;top:17px;width:120px;height:10px;border-radius:12px;background:#ff5a36}.pen.p1{top:92px;left:42px}.pen.p2{top:216px;left:126px;background:#4167ff;transform:rotate(-27deg)}.pen.p2:before{border-left-color:#4167ff}.pen.p2:after{background:#fff}.pen.p3{top:344px;left:25px;background:#f2c84b;transform:rotate(-31deg)}.pen.p3:before{border-left-color:#f2c84b}.pen.p3:after{background:#16181d}.float-card{position:absolute;background:white;border:1px solid var(--line);border-radius:18px;padding:14px 16px;box-shadow:0 18px 50px rgba(0,0,0,.08);font-size:13px;font-weight:750}.fc1{right:24px;top:34px}.fc2{left:24px;bottom:32px}.section{padding:86px 0}.section.soft{background:var(--paper)}.section-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:34px}.section-head h2,.page-hero h1{font-size:clamp(36px,4.5vw,60px);line-height:1.03;letter-spacing:-.055em;margin:10px 0}.section-head p,.page-hero p{max-width:670px;color:var(--muted);font-size:17px}.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.feature{padding:28px;border:1px solid var(--line);border-radius:var(--radius);background:#fff}.feature .num{font-size:12px;font-weight:850;color:#8a8d94}.feature h3{font-size:22px;letter-spacing:-.035em;margin:24px 0 9px}.feature p{color:var(--muted);margin:0}.category-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.cat-card{min-height:210px;border-radius:24px;padding:24px;background:#17191d;color:#fff;display:flex;flex-direction:column;justify-content:space-between;transition:.2s}.cat-card:nth-child(2){background:#4268ff}.cat-card:nth-child(3){background:#f1c84b;color:#151515}.cat-card:nth-child(4){background:#f26b4b}.cat-card:hover{transform:translateY(-3px)}.cat-card span{font-size:12px;text-transform:uppercase;letter-spacing:.12em;font-weight:800;opacity:.75}.cat-card strong{font-size:25px;line-height:1.05;letter-spacing:-.04em}.process{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}.step{border-top:2px solid #222;padding:22px 8px 0}.step b{display:block;font-size:12px;margin-bottom:20px;color:#80838a}.step h3{font-size:19px;margin:0 0 7px}.step p{font-size:14px;color:var(--muted)}.tech-note{display:grid;grid-template-columns:.85fr 1.15fr;border-radius:30px;overflow:hidden;background:#111318;color:white}.tech-visual{min-height:420px;background:radial-gradient(circle at 30% 25%,#3f66ff,transparent 40%),radial-gradient(circle at 75% 70%,#ff5a36,transparent 37%),#17191d;display:grid;place-items:center;padding:40px}.ring{width:240px;height:240px;border:28px solid rgba(255,255,255,.85);border-radius:50%;position:relative}.ring:before{content:"TIP FIT";position:absolute;inset:0;display:grid;place-items:center;font-weight:850;letter-spacing:.12em;font-size:12px}.tech-copy{padding:48px}.tech-copy h2{font-size:40px;line-height:1.05;letter-spacing:-.05em}.tech-copy p{color:#c8cad0}.pill-list{display:flex;gap:8px;flex-wrap:wrap}.pill{font-size:12px;font-weight:800;border:1px solid rgba(255,255,255,.2);border-radius:999px;padding:8px 11px}.page-hero{padding:66px 0 34px}.crumb{font-size:13px;color:#777b82}.catalog-layout{display:grid;grid-template-columns:255px 1fr;gap:28px;align-items:start}.filters{position:sticky;top:98px;border:1px solid var(--line);border-radius:20px;padding:20px;background:white}.filter-group{padding:17px 0;border-top:1px solid var(--line)}.filter-group:first-child{border-top:0;padding-top:0}.filter-group label.title{display:block;font-size:12px;text-transform:uppercase;letter-spacing:.1em;font-weight:850;margin-bottom:10px}.filter-group select,.search-input{width:100%;border:1px solid #d8dade;border-radius:12px;padding:11px 12px;background:white}.catalog-top{display:flex;justify-content:space-between;gap:16px;align-items:center;margin-bottom:18px}.catalog-search{display:flex;gap:10px;flex:1}.catalog-search .search-input{max-width:560px}.result-count{font-size:13px;color:var(--muted);white-space:nowrap}.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.product-card{border:1px solid var(--line);border-radius:22px;overflow:hidden;background:white;transition:.2s;display:flex;flex-direction:column}.product-card:hover{transform:translateY(-3px);box-shadow:0 18px 44px rgba(0,0,0,.07)}.product-art{height:220px;background:linear-gradient(140deg,#f0f1ee,#f8efe7);position:relative;display:grid;place-items:center}.product-art:before{content:"";width:72%;height:34px;border-radius:20px;background:#17191d;transform:rotate(-18deg);box-shadow:0 15px 28px rgba(0,0,0,.16)}.product-art:after{content:"";position:absolute;width:25%;height:8px;border-radius:10px;background:#ff5a36;transform:rotate(-18deg)}.product-card:nth-child(3n+2) .product-art:before{background:#4268ff}.product-card:nth-child(3n+3) .product-art:before{background:#f2c84b}.product-body{padding:18px}.badges{display:flex;gap:6px;flex-wrap:wrap}.badge{font-size:10px;text-transform:uppercase;letter-spacing:.07em;font-weight:850;background:#f1f2f4;border-radius:999px;padding:6px 8px}.product-body h3{font-size:19px;line-height:1.14;letter-spacing:-.035em;margin:14px 0 7px}.product-body p{font-size:13px;color:var(--muted);margin:0 0 14px}.spec-mini{font-size:12px;color:#4e5158;border-top:1px solid var(--line);padding-top:12px}.product-link{display:flex;justify-content:space-between;align-items:center;margin-top:14px;font-weight:800;font-size:13px}.product-detail{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}.product-hero-art{height:560px;border-radius:30px;background:linear-gradient(145deg,#edeff1,#faf1e5);display:grid;place-items:center;position:sticky;top:100px}.big-pen{width:75%;height:52px;border-radius:30px;background:#17191d;transform:rotate(-24deg);position:relative;box-shadow:0 30px 65px rgba(0,0,0,.18)}.big-pen:after{content:"";position:absolute;width:34%;height:10px;left:17%;top:21px;background:#ff5a36;border-radius:10px}.detail-meta{font-size:12px;text-transform:uppercase;letter-spacing:.12em;font-weight:850;color:#777}.detail h1{font-size:52px;line-height:1.02;letter-spacing:-.055em}.detail .lead{font-size:18px;color:var(--muted)}.spec-table{margin:30px 0;border-top:1px solid var(--line)}.spec-row{display:grid;grid-template-columns:160px 1fr;gap:20px;padding:15px 0;border-bottom:1px solid var(--line);font-size:14px}.spec-row b{color:#55585f}.notice{border-radius:18px;background:#f5f5f1;padding:18px;font-size:13px;color:#51545a}.oem-hero{display:grid;grid-template-columns:1fr .9fr;gap:50px;align-items:center}.oem-stack{display:grid;gap:12px}.oem-card{border:1px solid var(--line);border-radius:20px;padding:20px;background:white}.oem-card b{font-size:12px;color:#777}.oem-card h3{margin:6px 0;font-size:19px}.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.flow-item{padding:22px;border-radius:20px;background:#fff;border:1px solid var(--line);min-height:180px}.flow-item span{display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:#17191d;color:#fff;font-weight:850;font-size:12px}.flow-item h3{font-size:18px;margin:30px 0 7px}.flow-item p{font-size:13px;color:var(--muted)}.sample-track{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:10px}.sample-track:before{content:"";position:absolute;left:10%;right:10%;top:17px;height:2px;background:#dfe1e5}.sample-node{position:relative;text-align:center;padding-top:0}.dot{width:34px;height:34px;border-radius:50%;background:#17191d;color:white;display:grid;place-items:center;margin:0 auto 14px;font-size:11px;font-weight:850;position:relative;z-index:2}.sample-node h4{margin:0;font-size:14px}.sample-node p{font-size:12px;color:var(--muted)}.blog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.article-card{border:1px solid var(--line);border-radius:22px;overflow:hidden}.article-cover{height:190px;background:linear-gradient(135deg,#17191d,#41454f);padding:22px;color:white;display:flex;align-items:end}.article-cover.alt{background:linear-gradient(135deg,#3f66ff,#7f96ff)}.article-cover.warm{background:linear-gradient(135deg,#f15f41,#f0b15b)}.article-card .copy{padding:19px}.article-card h3{font-size:20px;line-height:1.18;letter-spacing:-.03em;margin:0 0 8px}.article-card p{font-size:13px;color:var(--muted)}.article{max-width:820px;margin:auto}.article h1{font-size:54px;line-height:1.03;letter-spacing:-.055em}.article h2{font-size:30px;letter-spacing:-.04em;margin-top:48px}.article p,.article li{font-size:17px;color:#44474d}.article .callout{border-left:4px solid var(--accent);padding:16px 20px;background:#faf7f4;border-radius:0 14px 14px 0}.contact-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:44px}.contact-panel{background:#17191d;color:white;border-radius:28px;padding:34px}.contact-panel p{color:#c4c7cd}.contact-form{display:grid;grid-template-columns:1fr 1fr;gap:13px}.contact-form .full{grid-column:1/-1}.contact-form input,.contact-form select,.contact-form textarea{width:100%;border:1px solid #d9dbe0;border-radius:13px;padding:13px 14px;background:#fff}.contact-form textarea{min-height:130px}.footer{padding:56px 0 28px;background:#111318;color:white;margin-top:70px}.footer-grid{display:grid;grid-template-columns:1.2fr repeat(3,.6fr);gap:28px}.footer p,.footer a{color:#b8bbc2;font-size:13px}.footer h4{font-size:12px;text-transform:uppercase;letter-spacing:.12em;color:#f6f6f6}.copyright{border-top:1px solid #2a2d33;margin-top:38px;padding-top:22px;font-size:12px;color:#8f939b}.empty{border:1px dashed #cfd2d7;border-radius:18px;padding:50px;text-align:center;color:var(--muted)}
@media(max-width:980px){.nav-links{display:none}.mobile-toggle{display:block}.hero-grid,.tech-note,.oem-hero,.product-detail,.contact-grid{grid-template-columns:1fr}.pen-scene{height:470px}.grid3,.product-grid,.blog-grid{grid-template-columns:repeat(2,1fr)}.category-strip,.process,.flow{grid-template-columns:repeat(2,1fr)}.catalog-layout{grid-template-columns:1fr}.filters{position:static;display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.filter-group{border:0;padding:0}.product-hero-art{position:static;height:430px}.footer-grid{grid-template-columns:1fr 1fr}.sample-track{grid-template-columns:1fr}.sample-track:before{display:none}}
@media(max-width:640px){.container{width:min(100% - 24px,var(--max))}.hero{padding-top:44px}.hero h1{font-size:47px}.pen-scene{height:390px}.pen{width:330px}.grid3,.product-grid,.blog-grid,.category-strip,.process,.flow,.filters,.contact-form{grid-template-columns:1fr}.section{padding:62px 0}.section-head{display:block}.catalog-top{align-items:flex-start;flex-direction:column}.product-detail{gap:26px}.detail h1,.article h1{font-size:40px}.spec-row{grid-template-columns:120px 1fr}.footer-grid{grid-template-columns:1fr}.nav-in{height:66px}}

@media(max-width:980px){body.menu-open .nav-links{display:flex;position:absolute;left:0;right:0;top:76px;background:#fff;flex-direction:column;align-items:flex-start;padding:20px;border-bottom:1px solid var(--line);box-shadow:0 20px 30px rgba(0,0,0,.06)}body.menu-open .nav-cta{display:none}}
@media(max-width:640px){body.menu-open .nav-links{top:66px}}

/* Lecai catalog import */
.product-art{overflow:hidden}.product-art .catalog-ref{position:absolute;left:14px;top:14px;font-size:10px;letter-spacing:.1em;font-weight:850;background:rgba(255,255,255,.86);padding:6px 8px;border-radius:999px;z-index:3}.product-art .art-label{position:absolute;right:14px;bottom:13px;font-size:11px;font-weight:850;color:#45484f;background:rgba(255,255,255,.88);padding:7px 9px;border-radius:10px;z-index:3}.product-art.art-water{background:linear-gradient(140deg,#e7efff,#f7f8fd)}.product-art.art-effect{background:linear-gradient(140deg,#f8e7f4,#fbf5dc)}.product-art.art-highlight{background:linear-gradient(140deg,#fff4bf,#edf7d9)}.product-art.art-writing{background:linear-gradient(140deg,#e8f5ef,#f4f0fa)}.product-art.art-special{background:linear-gradient(140deg,#f4ece6,#edf0f5)}.badge.made{background:#fff0db;color:#8b5515}.catalog-more{text-align:center;padding:28px 0 6px}.detail-art-note{position:absolute;left:24px;bottom:24px;border:1px solid rgba(17,19,24,.1);background:rgba(255,255,255,.86);backdrop-filter:blur(10px);border-radius:999px;padding:9px 12px;font-size:11px;font-weight:850;letter-spacing:.08em;text-transform:uppercase}.product-hero-art.art-water{background:linear-gradient(145deg,#e4eeff,#fafbff)}.product-hero-art.art-effect{background:linear-gradient(145deg,#f6e7f1,#fff5d9)}.product-hero-art.art-highlight{background:linear-gradient(145deg,#fff1af,#eff8db)}.product-hero-art.art-writing{background:linear-gradient(145deg,#e3f4eb,#f3eff9)}.product-hero-art.art-special{background:linear-gradient(145deg,#f4e8e2,#edf1f6)}#reviewNotice{margin:18px 0;background:#fff7e8;border:1px solid #f2d7a7}.filters .filter-group select{font-size:13px}


/* Excel-mounted real product photography */
.real-product-art{background:#fff!important;padding:18px;isolation:isolate}
.real-product-art:before,.real-product-art:after{display:none!important}
.product-thumb{width:100%;height:100%;object-fit:contain;display:block;transition:transform .25s ease}
.product-card:hover .product-thumb{transform:scale(1.025)}
.real-product-art .catalog-ref,.real-product-art .art-label{box-shadow:0 4px 14px rgba(0,0,0,.08)}
.real-detail-art{background:#fff!important;overflow:hidden;border:1px solid var(--line);padding:34px}
.real-detail-art .big-pen{display:none}
.product-detail-image{display:block;max-width:100%;max-height:470px;width:auto;height:auto;object-fit:contain}
.real-detail-art .detail-art-note{background:rgba(255,255,255,.94)}
@media(max-width:640px){.real-product-art{padding:12px}.real-detail-art{padding:18px}.product-detail-image{max-height:360px}}

/* V5 product family UI */
.product-photo-card{position:relative;aspect-ratio:1/1;background:#f7f8fb;display:flex;align-items:center;justify-content:center;overflow:hidden;border-bottom:1px solid #e8eaf0}.product-photo-card img{width:100%;height:100%;object-fit:contain;padding:12px}.variant-count{position:absolute;right:12px;bottom:12px;background:rgba(17,24,39,.86);color:#fff;border-radius:999px;padding:7px 10px;font-size:12px}.family-card .product-body p{display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}.compact-hero{padding-bottom:8px}.product-photo-shell{background:#f6f7fa;border:1px solid #e5e7eb;border-radius:20px;min-height:520px;display:flex;align-items:center;justify-content:center;padding:24px}.detail-product-image{width:100%;max-height:520px;object-fit:contain}.variant-thumbs{display:flex;gap:10px;overflow:auto;padding:12px 0}.thumb{width:72px;height:72px;background:#fff;border:1px solid #dfe3ea;border-radius:10px;padding:4px;cursor:pointer;flex:0 0 auto}.thumb.active{outline:2px solid #111827}.thumb img{width:100%;height:100%;object-fit:contain}.family-summary{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:22px 0}.mini-stat{border:1px solid #e6e8ed;border-radius:14px;padding:14px}.mini-stat b{display:block;font-size:22px}.mini-stat span{font-size:12px;color:#707783}.variant-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.variant-card{display:grid;grid-template-columns:92px 1fr;gap:14px;text-align:left;align-items:center;border:1px solid #e0e3e9;background:#fff;border-radius:16px;padding:10px;cursor:pointer}.variant-card:hover,.variant-card.selected{border-color:#202637;box-shadow:0 8px 26px rgba(17,24,39,.08)}.variant-image{width:92px;height:92px;background:#f8f9fb;border-radius:10px;display:flex;align-items:center;justify-content:center}.variant-image img{width:100%;height:100%;object-fit:contain}.variant-card b,.variant-card span,.variant-card small{display:block}.variant-card span{font-size:13px;color:#606875;margin:4px 0}.variant-card small{color:#969daa}@media(max-width:900px){.variant-grid{grid-template-columns:1fr}.product-photo-shell{min-height:340px}.family-summary{grid-template-columns:1fr 1fr 1fr}}

/* V5.2 multilingual */
.language-switcher{display:flex;align-items:center;gap:6px;margin-left:auto;margin-right:8px;border:1px solid #e4e5e8;border-radius:999px;padding:4px 8px;background:#fff;white-space:nowrap}.language-switcher .globe{font-size:15px;color:#59606b}.language-switcher select{border:0;background:transparent;font:inherit;font-size:13px;font-weight:650;color:#25272b;outline:none;cursor:pointer;max-width:105px}.nav-in>.language-switcher+.nav-cta{margin-left:0}@media(max-width:900px){.language-switcher{margin-left:auto}.language-switcher select{max-width:82px}.nav-cta{display:none}}@media(max-width:560px){.language-switcher .globe{display:none}.language-switcher{padding:4px 6px;margin-right:2px}}