:root{
  --red:#d72323; --red-dark:#b51c1c; --dark:#232323; --text:#333;
  --muted:#666; --faint:#999; --line:#e6e6e6; --light:#f6f6f6;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:"Helvetica Neue",Arial,"Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);background:#fff;font-size:15px;line-height:1.7}
a{color:inherit;text-decoration:none}
img{max-width:100%}
h1,h2,h3,h4{margin:0;color:var(--dark);font-weight:700;line-height:1.3}
.section{max-width:1360px;margin:0 auto;padding:0 4%}
.btn{display:inline-block;padding:13px 26px;background:var(--red);color:#fff;border:1px solid var(--red);font-size:15px;line-height:1.2;transition:all .2s ease;cursor:pointer}
.btn:hover{background:var(--red-dark);border-color:var(--red-dark)}
.btn.ghost{background:transparent;border-color:#5a5a5a;color:#fff}
.btn.ghost:hover{border-color:var(--red);color:#fff;background:var(--red)}
.btn.small{padding:9px 16px;font-size:13px}
.kicker{color:var(--red);font-size:12px;font-weight:700;letter-spacing:3px;text-transform:uppercase;margin-bottom:14px}

/* header */
.en-head{background:#fff;border-bottom:1px solid var(--line);position:relative;z-index:20}
.en-head-inner{max-width:1360px;margin:0 auto;padding:0 4%;height:82px;display:flex;align-items:center;gap:28px}
.en-logo img{height:34px;display:block}
.en-nav{display:flex;gap:26px;margin-left:auto;flex-wrap:wrap}
.en-nav a{font-size:14px;color:var(--text);white-space:nowrap;padding:6px 0;border-bottom:2px solid transparent}
.en-nav a:hover,.en-nav a.active{color:var(--red);border-bottom-color:var(--red)}
.en-lang{margin-left:10px}
.lang-select{appearance:none;-webkit-appearance:none;border:1px solid var(--line);background:#fff url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M0 0l5 6 5-6z' fill='%23666'/%3E%3C/svg%3E") no-repeat right 10px center;padding:7px 28px 7px 10px;font-size:13px;color:var(--text);cursor:pointer}

/* hero */
.hero{position:relative;background:#171717;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.35}
.hero:after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,10,10,.92) 0%,rgba(10,10,10,.7) 55%,rgba(10,10,10,.25) 100%)}
.hero-inner{position:relative;z-index:2;max-width:1360px;margin:0 auto;padding:76px 4% 70px;display:flex;align-items:center;gap:40px}
.hero-copy{flex:1.05;min-width:0}
.hero-copy h1{color:#fff;font-size:54px;font-weight:700;line-height:1.18;margin-bottom:20px;letter-spacing:-.5px}
.hero-copy p{color:#c9c9c9;font-size:17px;line-height:1.8;max-width:560px;margin:0 0 30px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-art{flex:.95;display:flex;justify-content:flex-end;align-items:center}
.hero-art img{max-height:460px;width:auto;filter:drop-shadow(0 20px 40px rgba(0,0,0,.5))}

/* generic page hero */
.page-hero{background:linear-gradient(120deg,#8e0f16,#d72323);padding:80px 4%;text-align:center}
.page-hero h1{color:#fff;font-size:44px;font-weight:700;letter-spacing:1px}

/* product grid */
.p-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding:38px 0 60px}
.p-card{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);padding:24px 22px 0;transition:box-shadow .25s ease}
.p-card:hover{box-shadow:0 14px 34px rgba(0,0,0,.08)}
.p-card-title{text-align:center;font-size:18px;font-weight:700;color:var(--dark);min-height:50px;display:flex;align-items:center;justify-content:center}
.p-card-sub{text-align:center;color:var(--faint);font-size:13px;min-height:38px;line-height:1.5;margin-top:4px}
.p-card-img{height:190px;display:flex;align-items:center;justify-content:center;margin:14px 0}
.p-card-img img{max-width:100%;max-height:190px;display:block}
.p-card-feats{color:var(--muted);font-size:12px;line-height:1.7;min-height:42px}
.p-card-model{margin-top:8px;color:var(--faint);font-size:12px;min-height:20px}
.p-card-btn{margin:auto -22px 0;height:42px;line-height:42px;text-align:center;background:var(--red);color:#fff;font-size:14px;transition:background .2s}
.p-card:hover .p-card-btn{background:var(--red-dark)}
.p-card[style*="display: none"] + .p-card{border-top:0}

/* products layout */
.products-wrap{display:flex;gap:34px;padding-top:30px;padding-bottom:80px;align-items:flex-start}
.cat-side{width:230px;flex:none;border:1px solid var(--line)}
.cat-title{background:var(--red);color:#fff;font-weight:700;font-size:16px;padding:16px 18px}
.cat,.subcat{display:block;padding:13px 18px;border-bottom:1px solid var(--line);font-size:14px;background:#f8f8f8;border-left:2px solid transparent}
.cat:hover,.cat.active{background:#fff;color:var(--red);border-left-color:var(--red);font-weight:700}
.subs{background:#f8f8f8;border-bottom:1px solid var(--line)}
.subcat{padding:9px 18px 9px 30px;font-size:13px;color:var(--muted);background:none;border-bottom:0}
.subcat:hover,.subcat.active{color:var(--red)}
.products-main{flex:1;min-width:0}
.products-main .p-grid{padding-top:0}
.empty{text-align:center;color:var(--faint);padding:50px 0}

/* product detail */
.crumb{max-width:1360px;margin:0 auto;padding:22px 4% 0;color:var(--faint);font-size:13px}
.crumb a:hover{color:var(--red)}
.product-detail{display:flex;gap:56px;padding-top:28px;padding-bottom:90px}
.pd-img{width:46%;flex:none;background:var(--light);padding:24px;display:flex;align-items:center;justify-content:center}
.pd-img img{max-height:460px}
.pd-copy{flex:1;min-width:0}
.pd-copy h1{font-size:34px;margin-bottom:14px}
.pd-sub{color:var(--muted);font-size:16px;margin:0 0 22px}
.pd-feats{list-style:none;padding:0;margin:0 0 22px}
.pd-feats li{position:relative;padding-left:18px;margin-bottom:9px;color:var(--muted);font-size:14px}
.pd-feats li:before{content:"\25B6";position:absolute;left:0;top:1px;color:var(--red);font-size:10px}
.pd-model{border-top:1px solid var(--line);padding-top:18px;color:var(--muted);font-size:14px}
.pd-model b{color:var(--dark)}
.pd-actions{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap}
.pd-actions .ghost{color:var(--text);border-color:#ccc}
.pd-actions .ghost:hover{color:#fff}

/* about */
.center-title{text-align:center;font-size:26px;margin:50px 0 0}
.center-title:after{content:"";display:block;height:1px;background:var(--line);margin-top:24px}
.about-grid{display:flex;gap:56px;align-items:flex-start;padding:44px 0 90px}
.about-img{width:44%;flex:none;background:var(--light);padding:22px}
.about-img img{display:block;margin:0 auto}
.about-copy{flex:1}
.about-copy h3{font-size:25px;margin-bottom:20px}
.about-copy p{color:var(--muted);font-size:15px;line-height:1.95;margin:0 0 14px}
.about-copy .tagline{color:var(--dark);font-weight:700;font-size:16px;margin-top:22px}

/* text pages */
.narrow{max-width:900px;padding-top:52px;padding-bottom:90px}
.lead-text{color:var(--muted);font-size:16px;line-height:2;margin:0 0 30px}

/* downloads */
.downloads-wrap{padding-top:34px;padding-bottom:90px}
.downloads-lead{color:var(--muted);max-width:820px}
.dl-tabs{display:flex;flex-wrap:wrap;gap:8px;margin:24px 0 26px}
.dl-tab{border:1px solid var(--line);background:#fff;padding:9px 16px;font-size:13px;color:var(--text);cursor:pointer}
.dl-tab.active{background:var(--red);border-color:var(--red);color:#fff}
.dl-panel{display:none}
.dl-panel.active{display:block}
.dl-row{display:flex;align-items:center;gap:18px;padding:16px 4px;border-bottom:1px solid var(--line)}
.dl-ext{width:48px;height:48px;flex:none;background:var(--light);color:var(--red);font-size:11px;font-weight:700;display:flex;align-items:center;justify-content:center}
.dl-info{flex:1;min-width:0}
.dl-name{color:var(--dark);font-size:15px;word-break:break-all}
.dl-size{color:var(--faint);font-size:12px;margin-top:3px}

/* contact */
.contact-wrap{padding-top:44px;padding-bottom:90px}
.contact-card{max-width:820px;border:1px solid var(--line);padding:36px 40px;background:#fff}
.contact-card h2{font-size:26px;margin-bottom:18px}
.contact-card p{color:var(--muted);margin:8px 0}
.contact-card a{color:var(--red)}
.contact-note{margin-top:20px;padding-top:18px;border-top:1px solid var(--line)}
.contact-card .btn{margin-top:18px}

/* footer */
.en-foot{background:var(--dark);color:#a9a9a9;padding:50px 4% 26px;font-size:13px}
.en-foot-inner{max-width:1360px;margin:0 auto;display:grid;grid-template-columns:1.4fr 1fr 1fr 1.3fr;gap:40px}
.foot-brand img{height:30px;display:block;margin-bottom:14px;filter:brightness(0) invert(1) sepia(1) saturate(3) hue-rotate(330deg)}
.foot-brand p{line-height:1.9;margin:0}
.foot-col h4{color:#fff;font-size:14px;margin-bottom:12px}
.foot-col a,.foot-col p{display:block;color:#a9a9a9;margin:0 0 8px;line-height:1.7}
.foot-col a:hover{color:#fff}
.en-copy{max-width:1360px;margin:38px auto 0;padding-top:18px;border-top:1px solid rgba(255,255,255,.1);color:#777;font-size:12px}

@media (max-width:1100px){
  .en-head-inner{height:auto;padding-top:14px;padding-bottom:14px;flex-wrap:wrap}
  .en-nav{order:3;width:100%;margin-left:0;gap:18px}
  .en-lang{margin-left:auto}
  .hero-copy h1{font-size:42px}
  .hero-art img{max-height:360px}
  .p-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:780px){
  .en-head-inner{gap:12px}
  .en-logo img{height:28px}
  .en-nav{overflow-x:auto;flex-wrap:nowrap;padding-bottom:4px}
  .en-nav a{font-size:13px}
  .hero-inner{flex-direction:column;padding:46px 5% 40px;gap:24px}
  .hero-copy h1{font-size:32px}
  .hero-copy p{font-size:15px}
  .hero-art{width:100%;justify-content:center}
  .hero-art img{max-height:260px}
  .page-hero{padding:50px 5%}
  .page-hero h1{font-size:30px}
  .section{padding-left:5%;padding-right:5%}
  .p-grid{grid-template-columns:1fr 1fr;gap:12px;padding:24px 0 40px}
  .p-card{padding:14px 12px 0}
  .p-card-title{font-size:14px;min-height:40px}
  .p-card-sub{font-size:12px;min-height:34px}
  .p-card-img{height:120px;margin:8px 0}
  .p-card-img img{max-height:120px}
  .p-card-feats{display:none}
  .p-card-model{font-size:11px}
  .p-card-btn{margin:10px -12px 0;height:34px;line-height:34px;font-size:12px}
  .products-wrap{flex-direction:column;gap:18px;padding-top:18px}
  .cat-side{width:100%;border:0;display:flex;flex-wrap:wrap;gap:6px}
  .cat-title{display:none}
  .cat,.subcat{width:auto;padding:8px 12px;border:1px solid var(--line);font-size:12px;background:#fff}
  .cat.active{background:var(--red);color:#fff;border-color:var(--red)}
  .subs{display:contents}
  .product-detail{flex-direction:column;gap:22px;padding-top:16px;padding-bottom:50px}
  .pd-img{width:100%}
  .pd-copy h1{font-size:25px}
  .about-grid{flex-direction:column;gap:22px;padding-bottom:50px}
  .about-img{width:100%}
  .center-title{margin-top:28px}
  .narrow{padding-top:30px;padding-bottom:50px}
  .contact-card{padding:24px 20px}
  .dl-row{gap:12px}
  .dl-ext{width:40px;height:40px;font-size:10px}
  .dl-name{font-size:13px}
  .en-foot-inner{grid-template-columns:1fr 1fr;gap:26px}
  .foot-brand{grid-column:1/-1}
}
@media (max-width:480px){
  .p-grid{grid-template-columns:1fr}
  .p-card-img{height:170px}
  .p-card-img img{max-height:170px}
  .en-foot-inner{grid-template-columns:1fr}
}


/* home extra sections */
.home-section{ padding-top:56px; }
.about-strip{ background:var(--light); padding:64px 0; }
.strip-grid{ display:flex; gap:56px; align-items:center; }
.strip-art{ width:42%; flex:none; background:var(--light); }
.strip-art img{ display:block; margin:0 auto; max-height:360px; }
.strip-copy{ flex:1; min-width:0; }
.strip-copy h2{ font-size:28px; margin:0 0 16px; }
.strip-copy p{ color:var(--muted); margin:0 0 24px; }
.contact-cta{ background:var(--red); padding:60px 0; text-align:center; }
.contact-cta h2{ color:#fff; font-size:30px; margin-bottom:12px; }
.contact-cta p{ color:#ffd9d9; margin:0 0 26px; }
.contact-cta .btn{ background:#fff; border-color:#fff; color:var(--red); }
.contact-cta .btn:hover{ background:var(--dark); border-color:var(--dark); color:#fff; }
@media (max-width:780px){
  .home-section{ padding-top:34px; }
  .about-strip{ padding:38px 0; }
  .strip-grid{ flex-direction:column; gap:24px; }
  .strip-art{ width:100%; }
  .contact-cta{ padding:40px 0; }
  .contact-cta h2{ font-size:22px; }
}

/* articles */
.article-wrap{padding-top:34px;padding-bottom:80px}
.article-list{margin-top:26px}
.article-row{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:20px 4px;border-bottom:1px solid var(--line)}
.article-row h3{font-size:18px;margin:0}
.article-row:hover h3{color:var(--red)}
.article-note{display:block;color:var(--faint);font-size:12px;margin-top:4px}
.article-more{color:var(--red);font-size:13px;white-space:nowrap}
.article-detail{padding-top:30px;padding-bottom:80px}
.article-detail h1{font-size:32px;margin-bottom:22px}
.article-body{color:var(--muted);font-size:15px;line-height:2}
.btn.dark{background:transparent;border-color:#ccc;color:var(--text)}
.btn.dark:hover{background:var(--dark);border-color:var(--dark);color:#fff}
@media(max-width:780px){.article-row{flex-direction:column;align-items:flex-start;gap:8px}.article-detail h1{font-size:24px}}

/* bilingual download buttons */
.dl-actions{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.btn.alt{background:#fff;color:var(--red);border-color:var(--red)}
.btn.alt:hover{background:var(--red);color:#fff}
@media(max-width:780px){.dl-actions{justify-content:flex-start}}

/* link-based language dropdown */
.lang-dd{position:relative;display:inline-block;font-size:13px}
.lang-dd summary{cursor:pointer;list-style:none;color:#666;padding:7px 10px;border:1px solid var(--line);background:#fff;user-select:none;white-space:nowrap}
.lang-dd summary::-webkit-details-marker{display:none}
.lang-dd summary:after{content:"\25BE";margin-left:5px;font-size:10px}
.lang-dd[open] summary{color:var(--red);border-color:var(--red)}
.lang-menu{position:absolute;right:0;top:calc(100% + 4px);background:#fff;border:1px solid #ddd;box-shadow:0 8px 20px rgba(0,0,0,.12);min-width:170px;z-index:99999;padding:6px 0}
.lang-menu a,.lang-menu span{display:block;padding:7px 14px;font-size:13px;color:#333;white-space:nowrap}
.lang-menu a:hover{background:#f7f7f7;color:var(--red)}
.lang-menu span{color:#bbb;cursor:default}

/* stats login entry + mail button */
.login-entry{display:inline-block;margin-left:12px;color:#666;font-size:13px;vertical-align:middle}
.login-entry:hover{color:var(--red)}
.mail-btn{display:inline-flex;align-items:center;gap:6px}
@media(max-width:780px){.login-entry{margin-left:8px;font-size:12px}}