:root{
  --primary:#0d4d8c;
  --primary-dark:#0a2c4e;
  --primary-light:#1268b3;
  --accent:#f2a33c;
  --accent-dark:#d9861b;
  --text:#2c3a4a;
  --text-light:#66788c;
  --bg:#ffffff;
  --bg-soft:#f3f6fa;
  --border:#dde5ee;
  --radius:10px;
  --shadow:0 6px 24px rgba(13,52,89,.08);
  --header-h:118px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Segoe UI","Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.65;font-size:16px}
img,svg{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ---------- Top bar ---------- */
.topbar{background:var(--primary-dark);color:#cfe0f2;font-size:13px}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:38px}
.topbar-left{display:flex;gap:22px;align-items:center}
.topbar i{font-style:normal}
.topbar a:hover{color:#fff}

/* ---------- Header / Nav ---------- */
.header{background:#fff;box-shadow:0 2px 12px rgba(13,52,89,.07);position:sticky;top:0;z-index:100}
.header .container{display:flex;align-items:center;justify-content:space-between;height:80px}
.logo{display:flex;align-items:center;gap:12px}
.logo-icon{width:46px;height:46px;flex:none}
.logo-text .zh{font-size:21px;font-weight:800;color:var(--primary-dark);letter-spacing:1px;line-height:1.15}
.logo-text .en{font-size:11.5px;color:var(--text-light);letter-spacing:.6px}
.nav{display:flex;align-items:center;gap:4px}
.nav>li{position:relative}
.nav>li>a{display:block;padding:28px 18px;font-size:15.5px;font-weight:600;color:var(--text);transition:.2s}
.nav>li>a:hover,.nav>li.active>a{color:var(--primary);box-shadow:inset 0 -3px 0 var(--accent)}
.mega{position:absolute;top:100%;left:50%;transform:translateX(-50%) translateY(8px);background:#fff;box-shadow:var(--shadow);border:1px solid var(--border);border-radius:var(--radius);padding:18px;width:660px;display:grid;grid-template-columns:repeat(4,1fr);gap:8px;opacity:0;visibility:hidden;transition:.25s;z-index:99}
.nav>li:hover .mega{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
.mega a{display:flex;align-items:center;gap:8px;padding:10px;border-radius:8px;font-size:14px;color:var(--text)}
.mega a:hover{background:var(--bg-soft);color:var(--primary)}
.mega .dot{width:8px;height:8px;border-radius:50%;background:var(--accent);flex:none}
.btn{display:inline-block;background:var(--accent);color:#1d1305;font-weight:700;padding:12px 28px;border-radius:6px;border:0;cursor:pointer;font-size:15px;font-family:inherit;transition:.2s}
.btn:hover{background:var(--accent-dark);transform:translateY(-1px)}
.btn-outline{background:transparent;border:2px solid #fff;color:#fff}
.btn-outline:hover{background:rgba(255,255,255,.15)}
.btn-primary{background:var(--primary)}
.btn-primary:hover{background:var(--primary-light)}
.nav-cta>a.btn{padding:11px 24px;box-shadow:none;background:var(--accent);color:#1d1305;font-weight:700}
.nav-cta>a.btn:hover{box-shadow:none;background:var(--accent-dark);color:#1d1305;transform:translateY(-1px)}
@media(max-width:820px){.nav-cta>a.btn{margin-top:14px;display:inline-block;padding:11px 24px}}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;flex-direction:column;gap:5px;padding:8px}
.nav-toggle span{width:26px;height:3px;background:var(--primary-dark);border-radius:2px}

/* ---------- Hero slider ---------- */
.hero{position:relative;height:560px;overflow:hidden;background:var(--primary-dark)}
.hero-slide{position:absolute;inset:0;opacity:0;transition:opacity .8s;display:flex;align-items:center;background:linear-gradient(100deg,rgba(8,36,64,.94) 0%,rgba(11,58,101,.82) 45%,rgba(15,80,140,.35) 100%),url("../images/bearing-ball.svg") right center/480px no-repeat}
.hero-slide.s2{background:linear-gradient(100deg,rgba(8,36,64,.94) 0%,rgba(11,58,101,.82) 45%,rgba(15,80,140,.35) 100%),url("../images/bearing-roller.svg") right center/480px no-repeat}
.hero-slide.s3{background:linear-gradient(100deg,rgba(8,36,64,.94) 0%,rgba(11,58,101,.82) 45%,rgba(15,80,140,.35) 100%),url("../images/bearing-spherical.svg") right center/480px no-repeat}
.hero-slide.active{opacity:1;z-index:2}
.hero-content{max-width:640px;color:#fff}
.hero-kicker{display:inline-block;background:rgba(242,163,60,.15);border:1px solid var(--accent);color:var(--accent);font-size:13.5px;font-weight:600;padding:5px 16px;border-radius:999px;margin-bottom:18px;letter-spacing:1px}
.hero-content h1{font-size:44px;line-height:1.25;margin-bottom:16px;font-weight:800}
.hero-content h1 em{font-style:normal;color:var(--accent)}
.hero-content p{font-size:17px;color:#c9d9ea;margin-bottom:30px;max-width:520px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.hero-dots{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:5}
.hero-dots button{width:34px;height:5px;border:0;border-radius:3px;background:rgba(255,255,255,.35);cursor:pointer}
.hero-dots button.active{background:var(--accent)}
.hero-arrow{position:absolute;top:50%;transform:translateY(-50%);z-index:5;width:46px;height:46px;border-radius:50%;border:0;background:rgba(255,255,255,.12);color:#fff;font-size:22px;cursor:pointer;transition:.2s}
.hero-arrow:hover{background:var(--accent);color:#1d1305}
.hero-arrow.prev{left:22px}
.hero-arrow.next{right:22px}

/* ---------- Sections ---------- */
.section{padding:80px 0}
.section.soft{background:var(--bg-soft)}
.section-head{text-align:center;max-width:720px;margin:0 auto 48px}
.section-head .kicker{color:var(--accent-dark);font-weight:700;font-size:14px;letter-spacing:2px;text-transform:uppercase}
.section-head h2{font-size:32px;color:var(--primary-dark);margin:8px 0 12px;font-weight:800}
.section-head p{color:var(--text-light);font-size:15.5px}

/* ---------- Product cards ---------- */
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:26px}
.product-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:.25s;display:flex;flex-direction:column}
.product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--primary-light)}
.product-thumb{background:linear-gradient(145deg,#eef3f9,#d9e4f0);padding:26px;display:flex;justify-content:center}
.product-thumb img{width:120px;height:120px;transition:.3s}
.product-card:hover .product-thumb img{transform:rotate(28deg) scale(1.06)}
.product-body{padding:20px 22px 24px;flex:1;display:flex;flex-direction:column}
.product-body h3{font-size:17.5px;color:var(--primary-dark);margin-bottom:8px}
.product-body p{font-size:13.5px;color:var(--text-light);flex:1;margin-bottom:14px}
.product-link{font-size:13.5px;font-weight:700;color:var(--primary)}
.product-link::after{content:" →"}
.hue2{filter:hue-rotate(-14deg) saturate(1.15)}
.hue3{filter:hue-rotate(16deg)}

/* ---------- About split ---------- */
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
.split-img{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);position:relative}
.split-img::after{content:"";position:absolute;inset:0;border:6px solid rgba(255,255,255,.6);border-radius:inherit;pointer-events:none;transform:translate(12px,12px);z-index:-1}
.split-text .kicker{color:var(--accent-dark);font-weight:700;font-size:14px;letter-spacing:2px;text-transform:uppercase}
.split-text h2{font-size:30px;color:var(--primary-dark);margin:8px 0 18px}
.split-text p{color:var(--text-light);margin-bottom:14px;font-size:15.5px}
.check-list{margin:18px 0 26px}
.check-list li{padding:6px 0 6px 30px;position:relative;font-weight:600;color:var(--text)}
.check-list li::before{content:"✓";position:absolute;left:0;top:6px;width:20px;height:20px;border-radius:50%;background:var(--primary);color:#fff;font-size:12px;display:flex;align-items:center;justify-content:center}

/* ---------- Stats band ---------- */

/* ---------- Why cards ---------- */
.why-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:30px 26px;transition:.25s}
.why-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.why-icon{width:52px;height:52px;border-radius:12px;background:linear-gradient(145deg,var(--primary),var(--primary-light));color:#fff;font-size:24px;display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.why-card h3{font-size:17px;color:var(--primary-dark);margin-bottom:8px}
.why-card p{font-size:14px;color:var(--text-light)}

/* ---------- Industries ---------- */
.industry-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.industry-item{background:#fff;border:1px solid var(--border);border-radius:8px;padding:20px 10px;text-align:center;font-size:14px;font-weight:600;color:var(--text);transition:.2s;cursor:default}
.industry-item:hover{border-color:var(--accent);color:var(--primary);transform:translateY(-3px);box-shadow:var(--shadow)}
.industry-item .ic{font-size:24px;display:block;margin-bottom:8px}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--border);border-radius:8px;margin-bottom:12px;overflow:hidden}
.faq-q{width:100%;text-align:left;background:none;border:0;padding:18px 52px 18px 22px;font-size:16px;font-weight:700;color:var(--primary-dark);cursor:pointer;position:relative;font-family:inherit}
.faq-q::after{content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);font-size:22px;color:var(--accent-dark);transition:.25s}
.faq-item.open .faq-q::after{transform:translateY(-50%) rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s;color:var(--text-light);font-size:15px}
.faq-a-inner{padding:0 22px 18px}

/* ---------- CTA banner ---------- */
.cta{background:linear-gradient(110deg,var(--primary-dark) 30%,var(--primary-light) 100%);color:#fff;text-align:center;padding:64px 20px}
.cta h2{font-size:30px;margin-bottom:12px}
.cta p{color:#c9d9ea;max-width:640px;margin:0 auto 28px}

/* ---------- Footer ---------- */
.footer{background:#0b2439;color:#93a9c0;font-size:14px}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr 1.2fr;gap:40px;padding:60px 0 46px}
.footer h4{color:#fff;font-size:16px;margin-bottom:18px;font-weight:700}
.footer .logo-text .zh{color:#fff}
.footer .logo-text .en{color:#93a9c0}
.footer li{margin-bottom:10px}
.footer a:hover{color:var(--accent)}
.f-contact li{padding-left:22px;position:relative}
.f-contact li::before{content:"›";position:absolute;left:4px;color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;text-align:center;font-size:13px;color:#6f88a2}

/* ---------- Floating ---------- */
.floats{position:fixed;right:18px;bottom:24px;display:flex;flex-direction:column;gap:10px;z-index:200}
.float-btn{width:48px;height:48px;border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-size:20px;box-shadow:var(--shadow);cursor:pointer;border:0;transition:.2s;text-decoration:none}
.float-btn:hover{transform:scale(1.08)}
.float-wa{background:#25d366}
.float-mail{background:var(--primary)}
.float-top{background:var(--primary-dark);opacity:0;pointer-events:none}
.float-top.show{opacity:1;pointer-events:auto}

/* ---------- Subpage banner ---------- */
.page-banner{background:linear-gradient(100deg,var(--primary-dark),var(--primary) 70%,rgba(18,104,179,.6)),url("../images/bearing-spherical.svg") right center/340px no-repeat;color:#fff;padding:64px 0}
.page-banner h1{font-size:34px;margin-bottom:8px}
.breadcrumb{font-size:13.5px;color:#bcd0e4}
.breadcrumb a:hover{color:var(--accent)}
.breadcrumb .sep{margin:0 8px;color:var(--accent)}

/* ---------- Products page ---------- */
.brand-strip{display:flex;justify-content:center;gap:26px;flex-wrap:wrap}
.brand-chip{background:#fff;border:1px solid var(--border);border-radius:8px;padding:16px 34px;font-size:20px;font-weight:800;color:var(--primary-dark);letter-spacing:2px;box-shadow:var(--shadow)}
.brand-chip span{color:var(--accent-dark);font-size:12px;display:block;letter-spacing:1px;font-weight:600;text-align:center}
.cat-block{display:grid;grid-template-columns:300px 1fr;gap:34px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:30px;margin-bottom:26px;align-items:center;scroll-margin-top:140px}
.cat-block:hover{box-shadow:var(--shadow)}
.cat-img{background:linear-gradient(145deg,#eef3f9,#d9e4f0);border-radius:8px;padding:34px;display:flex;justify-content:center}
.cat-img img{width:180px;height:180px}
.cat-info h3{font-size:22px;color:var(--primary-dark);margin-bottom:10px}
.cat-info h3 small{font-size:13px;color:var(--text-light);font-weight:500;margin-left:10px}
.cat-info p{color:var(--text-light);font-size:14.5px;margin-bottom:14px}
.series-tags{display:flex;flex-wrap:wrap;gap:8px}
.series-tags span{background:var(--bg-soft);border:1px solid var(--border);color:var(--primary);border-radius:999px;padding:4px 13px;font-size:12.5px;font-weight:600;font-family:Consolas,monospace}

/* ---------- About page ---------- */
.timeline{position:relative;max-width:860px;margin:0 auto;padding-left:0}
.timeline::before{content:"";position:absolute;left:50%;top:0;bottom:0;width:3px;background:linear-gradient(var(--accent),var(--primary));transform:translateX(-50%)}
.tl-item{width:50%;padding:0 38px 44px;position:relative}
.tl-item:nth-child(even){margin-left:50%}
.tl-item::before{content:"";position:absolute;top:6px;width:15px;height:15px;border-radius:50%;background:#fff;border:4px solid var(--accent);z-index:1}
.tl-item:nth-child(odd)::before{right:-8px}
.tl-item:nth-child(even)::before{left:-8px}
.tl-year{font-size:24px;font-weight:800;color:var(--primary)}
.tl-item h4{color:var(--primary-dark);margin:6px 0 6px}
.tl-item p{color:var(--text-light);font-size:14px}
.facility-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.facility-card .fimg{padding:26px;background:linear-gradient(145deg,#eef3f9,#d9e4f0);display:flex;justify-content:center}
.facility-card .fimg img{width:150px;height:150px}
.facility-card .fbody{padding:22px 24px 26px}
.facility-card h3{color:var(--primary-dark);font-size:17px;margin-bottom:8px}
.facility-card p{color:var(--text-light);font-size:14px}

/* ---------- Contact page ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:40px;align-items:stretch}
.info-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:22px 24px;display:flex;gap:16px;margin-bottom:16px;align-items:flex-start}
.info-card:hover{box-shadow:var(--shadow)}
.info-ic{width:44px;height:44px;border-radius:10px;flex:none;background:linear-gradient(145deg,var(--primary),var(--primary-light));color:#fff;font-size:19px;display:flex;align-items:center;justify-content:center}
.info-card h4{color:var(--primary-dark);font-size:15px;margin-bottom:3px}
.info-card p{color:var(--text-light);font-size:14px}
.map-side{border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);min-height:460px;background:#e8eef6}
.map-side iframe{width:100%;height:100%;border:0;min-height:460px;display:block}

/* ---------- Toast ---------- */

/* ---------- Reveal animation ---------- */

/* ---------- Responsive ---------- */
@media(max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .industry-grid{grid-template-columns:repeat(4,1fr)}
  .footer-top{grid-template-columns:1fr 1fr}
  .hero-content h1{font-size:36px}
  .mega{width:520px;grid-template-columns:repeat(2,1fr)}
}
@media(max-width:820px){
  .split{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .cat-block{grid-template-columns:1fr}
  .grid-3{grid-template-columns:1fr 1fr}
  .nav-toggle{display:flex}
  .nav{position:fixed;top:0;right:-280px;width:270px;height:100vh;background:#fff;flex-direction:column;align-items:stretch;padding:80px 18px 30px;box-shadow:-6px 0 24px rgba(0,0,0,.15);transition:right .3s;gap:0;overflow-y:auto}
  .nav.open{right:0}
  .nav>li>a{padding:14px 10px;border-bottom:1px solid var(--border)}
  .mega{position:static;transform:none;opacity:1;visibility:visible;box-shadow:none;border:0;width:auto;display:none;padding:4px 0 10px 14px}
  .nav>li.open .mega{display:grid}
  .hero{height:480px}
  .topbar-left span.hide-sm{display:none}
  .timeline::before{left:12px}
  .tl-item{width:100%;padding-left:42px;padding-right:0}
  .tl-item:nth-child(even){margin-left:0}
  .tl-item::before{left:4px !important;right:auto !important}
}
@media(max-width:560px){
  .grid-4,.grid-3,.form-row{grid-template-columns:1fr}
  .industry-grid{grid-template-columns:repeat(3,1fr)}
  .footer-top{grid-template-columns:1fr}
  .hero-content h1{font-size:29px}
  .section{padding:56px 0}
}