:root{
  --ink:#0c1722;--muted:#63707c;--line:#d9e0e6;--surface:#f5f7f8;--white:#fff;
  --accent:#b85c2b;--accent-dark:#8c431f;--steel:#2e4356;--max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:var(--white);line-height:1.6;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit}
.container{width:min(var(--max),calc(100% - 40px));margin:0 auto}
.eyebrow{font-size:.76rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--accent)}
.topline{background:var(--ink);color:#cdd6df;font-size:.82rem}
.topline .container{display:flex;justify-content:space-between;gap:20px;padding:8px 0}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-bottom:1px solid rgba(217,224,230,.8)}
.nav{height:76px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.brand{display:flex;align-items:center;gap:12px;font-weight:900;letter-spacing:.08em}
.brand-mark{width:34px;height:34px;display:grid;place-items:center;background:var(--ink);color:#fff;font-size:.82rem;letter-spacing:0}
.nav-links{display:flex;align-items:center;gap:30px;font-size:.92rem;font-weight:650}
.nav-links a{position:relative}
.nav-links a.active:after,.nav-links a:hover:after{content:"";position:absolute;left:0;right:0;bottom:-9px;height:2px;background:var(--accent)}
.nav-actions{display:flex;align-items:center;gap:12px}
.lang{font-size:.84rem;color:var(--muted);min-height:44px;display:inline-flex;align-items:center}
.nav-toggle{display:none;border:0;background:transparent;font-size:1.4rem;min-width:44px;min-height:44px;align-items:center;justify-content:center;cursor:pointer}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 20px;border:1px solid var(--ink);font-weight:750;font-size:.92rem;transition:.2s ease;cursor:pointer}
.btn-primary{background:var(--ink);color:#fff}
.btn-primary:hover{background:var(--steel);border-color:var(--steel)}
.btn-accent{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn-accent:hover{background:var(--accent-dark);border-color:var(--accent-dark)}
.btn-light{background:#fff}
.hero{padding:84px 0 58px;background:linear-gradient(120deg,#f8fafb 0%,#eef2f4 100%);overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.03fr .97fr;align-items:center;gap:62px}
.hero h1,.page-hero h1{font-size:clamp(2.5rem,5.1vw,5rem);line-height:1.02;letter-spacing:-.045em;margin:14px 0 24px;max-width:780px}
.hero p{font-size:1.08rem;color:var(--muted);max-width:640px;margin:0 0 30px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap}
.hero-visual{position:relative}
.hero-visual img{width:100%;border:1px solid var(--line);box-shadow:0 26px 70px rgba(12,23,34,.12)}
.hero-label{position:absolute;left:-22px;bottom:24px;background:#fff;padding:16px 18px;border-left:3px solid var(--accent);box-shadow:0 14px 30px rgba(12,23,34,.12);font-weight:750}
.trust-strip{border-bottom:1px solid var(--line);background:#fff}
.trust-grid{display:grid;grid-template-columns:repeat(3,1fr)}
.trust-item{padding:22px 26px;border-right:1px solid var(--line)}
.trust-item:last-child{border-right:0}
.trust-item strong{display:block;font-size:.98rem;margin-bottom:2px}
.trust-item span{color:var(--muted);font-size:.86rem}
.section{padding:84px 0}
.section-soft{background:var(--surface)}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:34px}
.section-head h2,.split-copy h2,.cta h2{font-size:clamp(1.9rem,3.3vw,3.2rem);line-height:1.08;letter-spacing:-.035em;margin:8px 0}
.section-head p{max-width:560px;color:var(--muted);margin:0}
.text-link{font-weight:800;color:var(--accent);white-space:nowrap}
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.product-card{border:1px solid var(--line);background:#fff;transition:.2s ease}
.product-card:hover{transform:translateY(-3px);box-shadow:0 18px 40px rgba(12,23,34,.08)}
.product-card img{aspect-ratio:16/10;object-fit:cover;background:#e8edf0}
.product-body{padding:22px}
.product-body h3{font-size:1.25rem;margin:0 0 8px}
.product-body p{color:var(--muted);margin:0 0 14px;font-size:.92rem}
.tags{display:flex;gap:7px;flex-wrap:wrap}
.tag{font-size:.73rem;padding:5px 8px;background:var(--surface);border:1px solid var(--line);color:var(--steel)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:58px;align-items:center}
.split img{border:1px solid var(--line);width:100%}
.split-copy p{color:var(--muted)}
.check-list{display:grid;gap:14px;margin-top:26px}
.check{display:flex;gap:12px;align-items:flex-start}
.check-num{flex:0 0 32px;height:32px;display:grid;place-items:center;background:var(--ink);color:#fff;font-size:.78rem;font-weight:800}
.process-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.process{background:#fff;padding:28px}
.process .num{font-size:.78rem;font-weight:850;color:var(--accent);letter-spacing:.12em}
.process h3{margin:12px 0 7px}
.process p{margin:0;color:var(--muted);font-size:.91rem}
.cta{background:var(--ink);color:#fff;padding:56px}
.cta p{color:#bdc8d1;max-width:640px}
.cta-row{display:flex;justify-content:space-between;align-items:center;gap:32px}
.page-hero{padding:74px 0 58px;background:var(--surface);border-bottom:1px solid var(--line)}
.page-hero p{max-width:700px;color:var(--muted);font-size:1.03rem}
.breadcrumb{font-size:.82rem;color:var(--muted);margin-bottom:18px}
.story-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.story-card{border-top:3px solid var(--ink);padding:26px;background:#fff;border-left:1px solid var(--line);border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
.story-card h3{margin:0 0 10px}
.story-card p{margin:0;color:var(--muted)}
.product-detail{display:grid;grid-template-columns:380px 1fr;border:1px solid var(--line);background:#fff;margin-bottom:28px}
.product-detail .media{background:#edf1f3;border-right:1px solid var(--line)}
.product-detail .media img{width:100%;height:100%;min-height:310px;object-fit:cover}
.product-detail .content{padding:30px}
.product-detail h2{margin:3px 0 8px;font-size:1.7rem}
.product-detail .intro{color:var(--muted);margin:0 0 22px}
.spec-table{width:100%;border-collapse:collapse;font-size:.9rem}
.spec-table th,.spec-table td{padding:11px 12px;border-top:1px solid var(--line);text-align:left;vertical-align:top}
.spec-table th{width:31%;color:var(--muted);font-weight:650;background:#fafbfb}
.notice{padding:14px 16px;background:#fff7ef;border:1px solid #eed8c7;color:#70452c;font-size:.86rem;margin-bottom:28px}
.contact-grid{display:grid;grid-template-columns:.72fr 1.28fr;gap:42px;align-items:start}
.contact-panel{background:var(--ink);color:#fff;padding:34px}
.contact-panel p{color:#bdc8d1}
.contact-panel .line{padding:16px 0;border-top:1px solid rgba(255,255,255,.14)}
.contact-panel .line strong{display:block;margin-bottom:3px}
.form-card{border:1px solid var(--line);padding:32px;background:#fff}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:grid;gap:7px}
.field.full{grid-column:1/-1}
.field label{font-size:.84rem;font-weight:750}
.field input,.field select,.field textarea{width:100%;border:1px solid #cfd7de;background:#fff;padding:12px 13px;outline:none}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--steel);box-shadow:0 0 0 3px rgba(46,67,86,.08)}
.field textarea{min-height:140px;resize:vertical}
.form-note{font-size:.78rem;color:var(--muted);margin-top:12px}
.form-status{display:none;margin-top:16px;padding:12px 14px;background:#eef4f7;border-left:3px solid var(--steel);font-size:.88rem}
.footer{background:#09121b;color:#fff;margin-top:84px}
.footer-grid{display:grid;grid-template-columns:1.3fr .7fr .7fr;gap:54px;padding:58px 0}
.footer p,.footer a{color:#9eacb8;font-size:.9rem}
.footer-links{display:grid;gap:8px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;color:#7e8d99;font-size:.78rem;display:flex;justify-content:space-between;gap:20px}
@media(max-width:900px){
 .hero-grid,.split,.contact-grid,.product-detail{grid-template-columns:1fr}
 .product-grid,.story-grid{grid-template-columns:1fr 1fr}
 .hero{padding-top:58px}
 .hero-label{left:12px}
 .product-detail .media{border-right:0;border-bottom:1px solid var(--line)}
 .product-detail .media img{min-height:240px;max-height:360px}
 .nav-links{display:none;position:absolute;left:0;right:0;top:76px;background:#fff;border-bottom:1px solid var(--line);padding:22px 20px;flex-direction:column;align-items:flex-start}
 .nav-links.open{display:flex}
 .nav-toggle{display:block}
 .nav-actions .btn{display:none}
 .trust-grid{grid-template-columns:1fr}
 .trust-item{border-right:0;border-bottom:1px solid var(--line)}
 .trust-item:last-child{border-bottom:0}
 .process-grid{grid-template-columns:1fr}
 .cta-row{align-items:flex-start;flex-direction:column}
}
@media(max-width:620px){
 .container{width:min(var(--max),calc(100% - 28px))}
 .topline{font-size:.76rem}
 .topline .container{justify-content:center;padding:6px 0}.topline span:last-child{display:none}
 .nav{height:64px;gap:10px}
 .brand{gap:9px;font-size:.9rem;letter-spacing:.055em}
 .brand-mark{width:32px;height:32px;font-size:.75rem}
 .nav-links{top:64px;padding:10px 14px 18px;gap:0;box-shadow:0 16px 30px rgba(12,23,34,.08)}
 .nav-links a{width:100%;min-height:48px;display:flex;align-items:center;padding:0 8px;border-bottom:1px solid var(--line)}
 .nav-links a:last-child{border-bottom:0}
 .nav-links a.active:after,.nav-links a:hover:after{display:none}
 .nav-actions{gap:4px}
 .lang{padding:0 8px}
 .nav-toggle{display:inline-flex}
 .product-grid,.story-grid,.form-grid{grid-template-columns:1fr}
 .hero{padding:44px 0 38px}
 .hero-grid{gap:32px}
 .hero h1,.page-hero h1{font-size:clamp(2.15rem,11vw,2.7rem);line-height:1.04;margin:10px 0 18px}
 .hero p,.page-hero p{font-size:1rem}
 .hero-actions{display:grid;grid-template-columns:1fr;gap:10px}
 .hero-actions .btn{width:100%;min-height:50px}
 .hero-label{position:static;margin-top:0;box-shadow:none;border:1px solid var(--line);border-top:0;padding:12px 14px;font-size:.88rem}
 .page-hero{padding:46px 0 38px}
 .breadcrumb{margin-bottom:12px}
 .section{padding:54px 0}
 .section-head{align-items:flex-start;flex-direction:column;gap:14px;margin-bottom:26px}
 .section-head h2,.split-copy h2,.cta h2{font-size:2rem}
 .text-link{white-space:normal}
 .product-body{padding:18px}
 .product-detail{margin-bottom:20px}
 .product-detail .media img{min-height:190px;max-height:260px}
 .product-detail .content{padding:20px}
 .product-detail h2{font-size:1.45rem}
 .spec-table,.spec-table tbody,.spec-table tr,.spec-table th,.spec-table td{display:block;width:100%}
 .spec-table tr{border-top:1px solid var(--line);padding:9px 0}
 .spec-table tr:first-child{border-top:0}
 .spec-table th,.spec-table td{border-top:0;padding:2px 10px}
 .spec-table th{background:transparent;font-size:.78rem;text-transform:uppercase;letter-spacing:.04em}
 .spec-table td{font-size:.92rem}
 .notice{font-size:.82rem;margin-bottom:20px}
 .contact-grid{gap:22px}
 .contact-panel{padding:24px}
 .form-card{padding:20px}
 .field input,.field select,.field textarea{font-size:16px;min-height:48px}
 .field textarea{min-height:130px}
 .field.full .btn{width:100%;min-height:50px}
 .cta{padding:30px 22px}
 .cta-row{gap:20px}
 .cta-row .btn{width:100%;min-height:50px}
 .footer{margin-top:58px}
 .footer-grid{grid-template-columns:1fr;gap:26px;padding:44px 0}
 .footer-links a{min-height:40px;display:flex;align-items:center}
 .footer-bottom{flex-direction:column;gap:6px;padding:16px 0}
}