*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Inter',Arial,'Microsoft YaHei',sans-serif;color:#4a4240;line-height:1.7;background:#fff}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
.container{max-width:1120px;margin:0 auto;padding:0 24px}
.hl{color:#f57c00}
.tc{text-align:center}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 32px;border-radius:8px;font-weight:600;font-size:0.85rem;cursor:pointer;border:none;transition:all 0.3s;font-family:inherit;letter-spacing:0.3px}
.btn-p{background:#f57c00;color:#fff}
.btn-p:hover{background:#e06f00;box-shadow:0 6px 24px rgba(245,124,0,0.25);transform:translateY(-2px)}
.btn-b{background:#2c2018;color:#fff}
.btn-b:hover{background:#1a1410;box-shadow:0 6px 24px rgba(44,32,24,0.2);transform:translateY(-2px)}
.btn-ol{background:transparent;color:#2c2018;border:1.5px solid rgba(44,32,24,0.3)}
.btn-ol:hover{background:rgba(44,32,24,0.04);border-color:#2c2018}

/* Section */
.s{padding:80px 0}
.st{font-size:1.75rem;font-weight:700;text-align:center;margin-bottom:8px;color:#1a1410;letter-spacing:-0.2px}
.sd{font-size:0.9rem;text-align:center;color:#7a7270;max-width:540px;margin:0 auto 48px;line-height:1.7}
.sb{display:inline-block;padding:4px 18px 5px;font-size:0.7rem;font-weight:600;color:#f57c00;background:#fff3e6;border-radius:20px;margin-bottom:12px;letter-spacing:0.8px;text-transform:uppercase}

/* Top bar */
.top{background:#2c2018;color:rgba(255,255,255,0.5);font-size:0.75rem;padding:6px 0}
.top .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:4px}
.top a{color:rgba(255,255,255,0.45);transition:color 0.2s}
.top a:hover{color:#f57c00}
.top .tel{font-weight:600;color:#f57c00!important}

/* Header */
.header{background:#fff;position:sticky;top:0;z-index:100;border-bottom:1px solid #ede8e2}
.header-in{display:flex;align-items:center;justify-content:space-between;height:76px}
.logo{display:flex;align-items:center;gap:12px;font-weight:800;font-size:1.25rem;color:#1a1410;flex-shrink:0;letter-spacing:-0.2px}
.logo-b{width:40px;height:40px;background:#2c2018;border-radius:10px;display:flex;align-items:center;justify-content:center;color:#f57c00;font-weight:900;font-size:0.8rem}
.nav{display:flex;align-items:center;gap:2px;list-style:none}
.nav a{padding:10px 22px;font-size:0.82rem;font-weight:500;color:#6a6260;border-radius:8px;transition:all 0.2s;letter-spacing:0.4px}
.nav a:hover{color:#1a1410;background:#f5f0eb}
.nav a.act{color:#f57c00;background:#fff3e6;font-weight:600}
.mt{display:none;flex-direction:column;gap:5px;cursor:pointer;background:none;border:none;padding:4px}
.mt span{width:24px;height:2.5px;background:#1a1410;border-radius:2px}

/* Hero */
.hero{position:relative;overflow:hidden;min-height:80vh;display:flex;align-items:center;background:#f5f0eb}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:0.5}
.hero-ov{position:absolute;inset:0;z-index:1;background:linear-gradient(135deg,rgba(245,240,235,0.92),rgba(245,240,235,0.7),rgba(245,240,235,0.3))}
.hero .container{position:relative;z-index:2;padding:60px 24px;max-width:620px}
.hero-bd{display:inline-flex;align-items:center;gap:8px;padding:6px 20px;border-radius:20px;font-size:0.75rem;border:1px solid rgba(245,124,0,0.2);background:rgba(245,124,0,0.06);color:#f57c00;margin-bottom:24px}
.hero-bd-d{width:6px;height:6px;border-radius:50%;background:#22c55e;display:inline-block;animation:pl 2s infinite}
@keyframes pl{0%,100%{opacity:1}50%{opacity:0.3}}
.hero h1{font-size:2.8rem;font-weight:700;line-height:1.1;color:#1a1410;margin-bottom:16px;letter-spacing:-0.4px}
.hero p{font-size:0.95rem;color:#6a6260;margin-bottom:28px;max-width:480px;line-height:1.7}
.hero-act{display:flex;gap:12px;flex-wrap:wrap}
.hero-note{margin-top:18px;font-size:0.74rem;color:#6a6260;letter-spacing:0.2px}

/* Product matching entry */
.finder{background:#fff;border-top:1px solid #ede8e2;border-bottom:1px solid #ede8e2;padding:34px 0}
.finder-in{display:flex;align-items:center;justify-content:space-between;gap:35px}
.finder h2{font-size:1.25rem;line-height:1.3;color:#1a1410;margin-bottom:5px}
.finder p{font-size:0.82rem;color:#6a6260;max-width:620px;line-height:1.6}
.finder .sb{margin-bottom:8px}
.finder-act{display:flex;gap:10px;flex-shrink:0;flex-wrap:wrap;justify-content:flex-end}

/* Stats strip */
.stats{margin-top:-40px;position:relative;z-index:3;padding-bottom:0}
.stats .container{background:#fff;border-radius:12px;box-shadow:0 4px 35px rgba(44,32,24,0.06);padding:28px 20px;display:grid;grid-template-columns:repeat(4,1fr);gap:8px}
.si{text-align:center;padding:8px}
.sv{font-size:1.8rem;font-weight:700;color:#2c2018}
.sv .hl{color:#f57c00}
.sl{font-size:0.78rem;color:#7a7270;margin-top:2px}

/* Factory video */
.factory-video{background:#fff;padding:68px 0;border-bottom:1px solid #ede8e2}
.factory-video-in{display:grid;grid-template-columns:minmax(250px,0.78fr) minmax(0,1.22fr);align-items:center;gap:54px}
.factory-video-copy{max-width:390px}
.factory-video-copy h2{font-size:1.55rem;line-height:1.25;color:#1a1410;margin:10px 0 12px}
.factory-video-copy p{font-size:0.86rem;color:#6a6260;line-height:1.7;margin-bottom:22px}
.factory-video-player{overflow:hidden;border-radius:10px;background:#1a1410;box-shadow:0 12px 32px rgba(44,32,24,0.12)}
.factory-video-player video{display:block;width:100%;aspect-ratio:16/9;background:#1a1410;object-fit:cover}

/* Features */
.f{background:#faf7f2}
.fg{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.fc{background:#fff;border-radius:12px;padding:32px 28px;border:1px solid #ede8e2;transition:all 0.3s}
.fc:hover{box-shadow:0 12px 40px rgba(44,32,24,0.05);border-color:#d5cec8;transform:translateY(-4px)}
.fi{width:44px;height:44px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:1.1rem;margin-bottom:16px}
.fc h3{font-size:0.95rem;font-weight:700;color:#1a1410;margin-bottom:6px}
.fc p{font-size:0.82rem;color:#6a6260;line-height:1.6}

/* CTA */
.cta{background:#faf7f2;padding:60px 0;text-align:center;border-top:1px solid #ede8e2}
.cta h2{font-size:1.5rem;font-weight:700;color:#1a1410;margin-bottom:8px}
.cta p{font-size:0.88rem;color:#6a6260;margin-bottom:24px;max-width:480px;margin-left:auto;margin-right:auto}

/* Footer */
.footer{background:#2c2018;color:rgba(255,255,255,0.4);font-size:0.82rem}
.fm{padding:48px 0 32px}
.fg2{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:35px}
.fb .logo{color:#fff;margin-bottom:8px}
.fb p{color:rgba(255,255,255,0.3);line-height:1.7;max-width:300px}
.footer h4{color:rgba(255,255,255,0.6);font-size:0.82rem;font-weight:600;margin-bottom:14px;letter-spacing:0.5px;text-transform:uppercase}
.footer ul{list-style:none}
.footer ul li{margin-bottom:7px}
.footer ul a{color:rgba(255,255,255,0.35);transition:color 0.2s}
.footer ul a:hover{color:#f57c00}
.fb2{background:#1a1410;padding:14px 0;font-size:0.72rem;color:rgba(255,255,255,0.2)}
.fb2 .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:6px}

/* Side */
.side{position:fixed;right:0;top:50%;transform:translateY(-50%);z-index:99}
.side a{display:flex;align-items:center;justify-content:center;width:44px;height:44px;background:#2c2018;color:#fff;font-size:0.9rem;transition:all 0.2s;border-bottom:1px solid rgba(255,255,255,0.06)}
.side a:first-child{border-radius:8px 0 0 0}
.side a:last-child{border-radius:0 0 0 8px;background:#f57c00}
.side a:hover{background:#f57c00;width:50px}

/* Page header */
.ph{background:#faf7f2;padding:44px 0;text-align:center;border-bottom:1px solid #ede8e2}
.ph h1{font-size:1.6rem;font-weight:700;color:#1a1410;margin-bottom:4px}
.ph p{font-size:0.85rem;color:#7a7270;max-width:480px;margin:0 auto}
.product-ph{position:relative;isolation:isolate;overflow:hidden;padding:64px 0 68px;background:#faf7f2}
.product-ph:before{content:"";position:absolute;z-index:-1;top:0;left:0;right:0;height:100%;background:linear-gradient(180deg,rgba(250,247,242,0.76) 0%,rgba(250,247,242,0.6) 42%,rgba(250,247,242,0.96) 100%),url('../images/clutch-range-showcase.png') center 44%/cover no-repeat;opacity:0.88}
.product-ph h1,.product-ph p{position:relative}
.about-ph{position:relative;isolation:isolate;overflow:hidden;padding:64px 0 68px;background:#faf7f2}
.about-ph:before{content:"";position:absolute;z-index:-1;inset:0;background:linear-gradient(180deg,rgba(250,247,242,0.82) 0%,rgba(250,247,242,0.7) 46%,rgba(250,247,242,0.96) 100%),url('../images/factory-aerial-2.jpg') center 48%/cover no-repeat;opacity:0.86}
.about-ph h1,.about-ph p{position:relative}
.contact-ph{position:relative;isolation:isolate;overflow:hidden;padding:64px 0 68px;background:#faf7f2}
.contact-ph:before{content:"";position:absolute;z-index:-1;inset:0;background:linear-gradient(180deg,rgba(250,247,242,0.84) 0%,rgba(250,247,242,0.72) 46%,rgba(250,247,242,0.97) 100%),url('../images/factory-aerial-2.jpg') center 48%/cover no-repeat;opacity:0.84}
.contact-ph h1,.contact-ph p{position:relative}

/* Products */
.pp{background:#faf7f2;padding:60px 0;min-height:400px}
.pf{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:32px}
.pf button{padding:8px 26px;border-radius:20px;font-size:0.8rem;font-weight:500;cursor:pointer;border:1.5px solid #ede8e2;background:#fff;color:#6a6260;transition:all 0.2s;font-family:inherit}
.pf button:hover,.pf button.act{color:#f57c00;border-color:#f57c00;background:#fff3e6}
.pf-tools{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin:-8px auto 24px}
.pf-tools label{display:flex;align-items:center;gap:8px;font-size:0.72rem;color:#7a7270}
.pf-tools label>span{white-space:nowrap}
.pf-search input,.pf-range select{height:38px;border:1.5px solid #ede8e2;border-radius:8px;background:#fff;color:#1a1410;font:inherit;padding:0 12px;min-width:230px}
.pf-range select{min-width:170px}
.pf-search input:focus,.pf-range select:focus{outline:none;border-color:#f57c00;box-shadow:0 0 0 3px rgba(245,124,0,0.06)}
.catalog-help{display:flex;align-items:center;justify-content:space-between;gap:20px;background:#fff;border:1px solid #ede8e2;border-radius:10px;padding:16px 18px;margin-bottom:18px}
.catalog-help div{display:flex;flex-direction:column;gap:2px}
.catalog-help strong{font-size:0.82rem;color:#1a1410}
.catalog-help span{font-size:0.76rem;color:#6a6260}
.catalog-help .btn{font-size:0.74rem;padding:9px 16px;white-space:nowrap}
.catalog-count{font-size:0.74rem;color:#8a817d;margin-bottom:12px}
.pg{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px}
.pc{border:1px solid #ede8e2;border-radius:12px;overflow:hidden;background:#fff;transition:all 0.3s}
.pc:hover{box-shadow:0 12px 40px rgba(44,32,24,0.05);border-color:#d5cec8;transform:translateY(-4px)}
.pc-img{width:100%;aspect-ratio:1/1;overflow:hidden;background:#f5f0eb}
.pc-img img{width:100%;height:100%;object-fit:cover;object-position:center;mix-blend-mode:multiply;transition:transform 0.5s}
.pc-img img[src*="product-hh150-assembly"]{object-fit:contain;padding:34px;transform:none}
.pc-img img[src*="product-hh140b-assembly"]{object-fit:cover;padding:0;transform:scale(1.08)}
.pc-img-compact img{object-fit:contain;padding:20px;transform:none!important}
.pc:hover .pc-img img{transform:scale(1.05)}
.pc:hover .pc-img img[src*="product-hh150-assembly"]{transform:scale(1.03)}
.pc:hover .pc-img img[src*="product-hh140b-assembly"]{transform:scale(1.12)}
.pc:hover .pc-img-compact img{transform:none!important}
.pc-bd{padding:20px 22px}
.pc-cat{font-size:0.68rem;font-weight:600;text-transform:uppercase;color:#f57c00;margin-bottom:4px;letter-spacing:0.6px}
.pc-tt{font-size:0.9rem;font-weight:700;color:#1a1410;margin-bottom:4px}
.pc-desc{font-size:0.78rem;color:#6a6260;line-height:1.5;margin-bottom:14px}
.pc-ts{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:14px}
.pc-t{padding:3px 10px;border-radius:4px;font-size:0.7rem;color:#6a6260;border:1px solid #ede8e2}
.pc .btn{width:100%;justify-content:center;padding:10px}
.product-empty{grid-column:1/-1;display:flex;flex-direction:column;align-items:center;gap:8px;text-align:center;padding:48px 20px;background:#fff;border:1px dashed #d5cec8;border-radius:10px}
.product-empty strong{font-size:0.95rem;color:#1a1410}
.product-empty span{font-size:0.8rem;color:#6a6260}
.product-empty .btn{margin-top:10px}

/* About */
.am{background:#fff;padding:70px 0}
.ag{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.av{position:relative}
.ap{width:100%;border-radius:12px;overflow:hidden;box-shadow:0 4px 24px rgba(44,32,24,0.04)}
.ap img{width:100%;height:auto;display:block}
.av-single .ap{max-width:520px;margin:0 auto}
.at h2{font-size:1.4rem;font-weight:700;color:#1a1410;margin-bottom:12px;line-height:1.3}
.at p{font-size:0.85rem;color:#6a6260;margin-bottom:10px;line-height:1.7}

/* Timeline section on about page */
.ts{background:#faf7f2;padding:65px 0}
.tl{max-width:640px;margin:0 auto}
.tli{display:grid;grid-template-columns:80px 1fr;gap:18px;padding:22px 0;border-bottom:1px solid #ede8e2}
.tli:last-child{border-bottom:none}
.tly{font-size:0.9rem;font-weight:700;color:#f57c00}
.tlt h4{font-size:0.88rem;font-weight:600;color:#1a1410;margin-bottom:3px}
.tlt p{font-size:0.78rem;color:#6a6260;line-height:1.6}

/* Contact */
.cp{background:#faf7f2;padding:60px 0}
.cg{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.ci{background:#fff;border-radius:12px;padding:32px;border:1px solid #ede8e2}
.ci h3{font-size:1rem;font-weight:700;color:#1a1410;margin-bottom:4px}
.ci>p{font-size:0.82rem;color:#6a6260;margin-bottom:20px}
.cm{display:flex;gap:12px;margin-bottom:16px;align-items:flex-start}
.cic{width:38px;height:38px;border-radius:10px;background:#f5f0eb;display:flex;align-items:center;justify-content:center;font-size:0.85rem;flex-shrink:0}
.cm h4{font-weight:600;font-size:0.8rem;color:#1a1410;margin-bottom:1px}
.cm p{font-size:0.78rem;color:#6a6260}
.cf{background:#fff;border-radius:12px;padding:32px;border:1px solid #ede8e2}
.cf h3{font-size:0.95rem;font-weight:700;color:#1a1410;margin-bottom:18px}
.fr{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:12px}
.fgg{margin-bottom:14px}
.fgg label{display:block;font-size:0.78rem;font-weight:600;color:#4a4240;margin-bottom:5px}
.fgg input,.fgg select,.fgg textarea{width:100%;padding:10px 14px;border:1.5px solid #ede8e2;border-radius:8px;font-size:0.85rem;font-family:inherit;background:#fff;color:#1a1410;transition:border-color 0.2s}
.fgg input:focus,.fgg select:focus,.fgg textarea:focus{outline:none;border-color:#f57c00;box-shadow:0 0 0 3px rgba(245,124,0,0.06)}
.fgg textarea{resize:vertical;min-height:100px}
.fs{width:100%;padding:12px;font-size:0.85rem;justify-content:center}
.fsu{display:none;text-align:center;padding:30px}
.fsu.show{display:block}
.fsu .ic{width:48px;height:48px;border-radius:50%;background:#d1fae5;display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-size:1.2rem;color:#065f46}
.fsu h4{font-size:1rem;font-weight:700;color:#1a1410;margin-bottom:4px}
.fsu p{font-size:0.82rem;color:#6a6260}
.toast{position:fixed;bottom:24px;right:24px;z-index:2000;padding:12px 22px;border-radius:8px;font-size:0.82rem;font-weight:500;box-shadow:0 6px 20px rgba(0,0,0,0.1);transform:translateY(80px);opacity:0;transition:all 0.35s;pointer-events:none}
.toast.show{transform:translateY(0);opacity:1;pointer-events:auto}
.toast-s{background:#065f46;color:#fff}
.toast-e{background:#991b1b;color:#fff}

/* R */
@media(max-width:1024px){
  .hero h1{font-size:2.2rem}
  .ag,.cg{grid-template-columns:1fr;gap:35px}
  .av-single .ap{max-width:560px}
  .stats .container{grid-template-columns:repeat(2,1fr)}
  .fg2{grid-template-columns:1fr 1fr}
  .fg{grid-template-columns:repeat(2,minmax(0,1fr))}
  .finder-in{align-items:flex-start;flex-direction:column}
  .finder-act{justify-content:flex-start}
  .factory-video-in{grid-template-columns:1fr;gap:28px}
  .factory-video-copy{max-width:560px}
}
@media(max-width:768px){
  .s{padding:55px 0}
  .st{font-size:1.35rem}
  .hero h1{font-size:1.6rem}
  .hero p{font-size:0.85rem}
  .hero{min-height:65vh}
  .ph h1{font-size:1.3rem}
  .nav{display:none}
  .mt{display:flex}
  .nav.open{display:flex;flex-direction:column;position:absolute;top:76px;left:0;right:0;background:#fff;padding:16px 24px 20px;border-bottom:1px solid #ede8e2;box-shadow:0 6px 24px rgba(44,32,24,0.04)}
  .nav.open a{padding:12px 16px}
  .stats .container{grid-template-columns:repeat(2,1fr);padding:20px}
  .fg,.pg{grid-template-columns:1fr}
  .fg2{grid-template-columns:1fr}
  .fr{grid-template-columns:1fr}
  .tli{grid-template-columns:1fr;gap:4px}
  .pf-tools{align-items:stretch;flex-direction:column}
  .pf-tools label{justify-content:space-between}
  .pf-search input,.pf-range select{flex:1;min-width:0}
  .catalog-help{align-items:flex-start;flex-direction:column}
}
@media(max-width:480px){
  .hero h1{font-size:1.3rem}
  .hero{min-height:60vh}
  .container{padding:0 16px}
  .stats{margin-top:-25px}
  .stats .container{grid-template-columns:1fr;padding:16px}
  .top .container{flex-direction:column;gap:2px;font-size:0.72rem}
  .logo{font-size:1.1rem}
  .logo-b{width:36px;height:36px}
}