:root{
  --navy:#0c1c2c;
  --navy-2:#12263a;
  --blue:#1d4e89;
  --blue-2:#2f6fb2;
  --orange:#f5a623;
  --orange-dark:#d98a12;
  --steel:#f4f7fa;
  --line:#dbe3ec;
  --text:#1f2937;
  --muted:#5f6f82;
  --white:#ffffff;
  --radius:14px;
  --shadow:0 14px 40px rgba(12,28,44,.10);
  --shadow-sm:0 6px 18px rgba(12,28,44,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Segoe UI","Microsoft YaHei",Arial,sans-serif;color:var(--text);background:var(--white);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{color:var(--orange-dark)}
.container{width:min(1600px,100%);padding:0 15px;margin:0 auto}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--orange);color:#000;padding:.6rem 1rem;z-index:2000;border-radius:0 0 8px 0}
.skip-link:focus{left:0}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.site-header{position:sticky;top:0;z-index:1000;background:rgba(12,28,44,.97);color:#fff;backdrop-filter:blur(8px);border-bottom:1px solid rgba(255,255,255,.08)}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:100px;gap:24px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;letter-spacing:.02em}
.brand img{height:50px;width:auto}
.brand-text{display:none;line-height:1.1}
.brand-text small{display:block;font-size:.66rem;font-weight:600;color:#c8d4e0;letter-spacing:.06em}
.main-nav{display:flex;align-items:center;gap:8px}
.main-nav a{color:#e5edf5;padding:.68rem .95rem;border-radius:9px;font-size:1.04rem;font-weight:600}
.main-nav a:hover,.main-nav a.active{background:rgba(255,255,255,.10);color:#fff}
.lang-switch{position:relative;margin-left:10px}
.lang-btn{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.10);color:#fff;border:1px solid rgba(255,255,255,.18);padding:.62rem .9rem;border-radius:9px;font-size:1rem;font-weight:700;cursor:pointer}
.lang-btn::after{content:"";border:4px solid transparent;border-top-color:currentColor;margin-top:4px}
.lang-menu{position:absolute;right:0;top:calc(100% + 8px);min-width:120px;background:#fff;color:var(--text);border-radius:10px;box-shadow:var(--shadow);padding:6px;display:none;z-index:20}
.lang-menu.open{display:block}
.lang-menu a{display:block;padding:.5rem .7rem;border-radius:7px;color:var(--text);font-weight:600}
.lang-menu a:hover{background:var(--steel);color:var(--navy)}
.menu-btn{display:none;background:none;border:0;width:42px;height:42px;border-radius:9px;color:#fff;font-size:1.5rem;line-height:1;cursor:pointer}
@media(max-width:960px){
  .header-inner{min-height:68px}
  .brand img{height:38px}
  .menu-btn{display:block}
  .main-nav{position:absolute;top:68px;left:0;right:0;background:var(--navy);flex-direction:column;align-items:stretch;padding:10px 18px 18px;display:none;box-shadow:var(--shadow)}
  .main-nav.open{display:flex}
  .lang-switch{margin:10px 0 0}
  .lang-menu{left:0;right:auto}
}
/* Second-level product navigation */
.nav-item{position:relative}
.has-dropdown > a::after{content:"▾";margin-left:6px;font-size:.72em;opacity:.85}
.dropdown{position:absolute;left:0;top:calc(100% + 8px);min-width:240px;background:#fff;border-radius:10px;box-shadow:var(--shadow);padding:6px;display:none;z-index:40}
.has-dropdown:hover .dropdown,.has-dropdown:focus-within .dropdown{display:block}
.dropdown a{display:block;color:var(--text);padding:.6rem .8rem;border-radius:7px;font-size:.95rem;font-weight:600;white-space:nowrap}
.dropdown a:hover{background:var(--steel);color:var(--navy)}
@media(max-width:960px){
  .main-nav .nav-item{width:100%}
  .main-nav .nav-item > a{display:block;width:100%}
  .dropdown{position:static;display:block;background:transparent;box-shadow:none;padding:2px 0 2px 14px;min-width:0}
  .dropdown a{color:#d7e3ef;white-space:normal}
}
/* Product subcategory grouping */
.subcat-nav{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0 22px}
.subcat-chip{display:inline-flex;align-items:center;padding:.55rem .9rem;border:1px solid var(--line);border-radius:999px;background:#fff;color:var(--navy);font-weight:700}
.subcat-chip:hover,.subcat-chip.active{background:var(--orange);color:#1a1207;border-color:var(--orange)}
.subcat-section{margin:0 0 34px;padding:18px;border:1px solid var(--line);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow-sm)}
.subcat-head{display:flex;align-items:center;justify-content:space-between;gap:12px;border-bottom:1px solid var(--line);padding-bottom:10px;margin-bottom:14px}
.subcat-head h3{margin:0;font-size:1.2rem;color:var(--navy)}
.subcat-head h3 a{color:inherit}
.subcat-head span{background:var(--steel);border-radius:999px;padding:.2rem .6rem;font-size:.8rem;font-weight:800;color:var(--muted)}
/* Live-site hero slides */
.hero-slides{position:absolute;inset:0}
.hero-slide{position:absolute;inset:0;background-size:cover;background-position:center;opacity:0;animation:heroFade 24s infinite}
.hero-slide:nth-child(1){animation-delay:0s}
.hero-slide:nth-child(2){animation-delay:6s}
.hero-slide:nth-child(3){animation-delay:12s}
.hero-slide:nth-child(4){animation-delay:18s}
@keyframes heroFade{0%{opacity:0}4%{opacity:.38}25%{opacity:.38}30%{opacity:0}100%{opacity:0}}

.hero{position:relative;color:#fff;background:var(--navy);overflow:hidden;min-height:800px;height:100vh;display:flex;align-items:center}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;opacity:.36}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(120deg,rgba(12,28,44,.10),rgba(18,38,58,.10))}
.hero-inner{position:relative;width:100%;padding:110px clamp(24px,5vw,90px) 120px clamp(28px,7vw,130px);text-shadow:0 2px 14px rgba(0,0,0,.55)}
.hero-kicker{display:inline-block;background:rgba(245,166,35,.16);border:1px solid rgba(245,166,35,.55);color:#ffd78a;padding:.4rem .8rem;border-radius:999px;font-size:.8rem;font-weight:700;letter-spacing:.04em;text-transform:uppercase}
.hero h1{font-size:clamp(2.1rem,5vw,4rem);line-height:1.06;margin:18px 0 14px;max-width:1000px}
.hero-subtitle{font-size:clamp(1rem,2.2vw,1.35rem);color:#d7e3ef;margin:0 0 22px;font-weight:600}
.hero-direct{max-width:900px;background:rgba(255,255,255,.08);border-left:4px solid var(--orange);padding:20px 24px;border-radius:0 12px 12px 0;color:#eef3f8;font-size:1.05rem}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:.85rem 1.35rem;border-radius:999px;font-weight:800;border:1px solid transparent;cursor:pointer;transition:.18s ease}
.btn-primary{background:var(--orange);color:#1a1207}
.btn-primary:hover{background:#ffb63d;color:#000;transform:translateY(-1px)}
.btn-ghost{background:transparent;border-color:rgba(255,255,255,.55);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.14);color:#fff}
.section{padding:96px 0}
.section-alt{background:var(--steel)}
.section-tight{padding:40px 0}
.eyebrow{color:var(--orange-dark);text-transform:uppercase;letter-spacing:.1em;font-size:.78rem;font-weight:800;margin:0 0 10px}
.section-title{font-size:clamp(1.6rem,3.2vw,2.4rem);line-height:1.18;margin:0 0 14px;color:var(--navy)}
.section-lead{max-width:860px;color:var(--muted);font-size:1.08rem;margin:0 0 42px}
.direct-box{background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;padding:24px 26px;border-radius:var(--radius);margin-bottom:30px}
.direct-box p{margin:0;max-width:900px;color:#edf3f9}
.direct-box strong{color:#ffd78a}
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden;display:flex;flex-direction:column;transition:.18s ease}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#c7d3e1}
.card-image{aspect-ratio:16/9;background:var(--steel);display:flex;align-items:center;justify-content:center;overflow:hidden}
.card-image img{width:100%;height:100%;object-fit:cover}
.card-body{padding:22px 24px 24px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-body h3{margin:0;font-size:1.25rem;color:var(--navy)}
.card-body p{margin:0;color:var(--muted);font-size:1rem}
.card-link{margin-top:auto;font-weight:800;font-size:.92rem}
.about-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:34px;align-items:center}
@media(max-width:800px){.about-grid{grid-template-columns:1fr}}
.about-media{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.about-media img{border-radius:var(--radius);width:100%;height:100%;object-fit:cover;box-shadow:var(--shadow-sm)}
.chip-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}
.chip{background:var(--steel);border:1px solid var(--line);padding:.5rem .8rem;border-radius:999px;font-size:.85rem;font-weight:700;color:var(--navy)}
.strength{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow-sm)}
.strength .num{display:inline-flex;width:34px;height:34px;align-items:center;justify-content:center;background:var(--navy);color:#fff;border-radius:9px;font-weight:800;margin-bottom:12px}
.strength h3{margin:0 0 8px;color:var(--navy)}
.strength p{margin:0;color:var(--muted)}
.steps{counter-reset:step;display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
@media(max-width:1000px){.steps{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.steps{grid-template-columns:1fr}}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;position:relative;box-shadow:var(--shadow-sm)}
.step::before{counter-increment:step;content:counter(step,decimal-leading-zero);font-size:1.8rem;font-weight:800;color:var(--orange)}
.step h3{margin:8px 0 6px;color:var(--navy);font-size:1rem}
.step p{margin:0;color:var(--muted);font-size:.9rem}
.faq-list{max-width:940px}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:10px;overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;padding:16px 20px;font-weight:800;color:var(--navy);display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:1.5rem;font-weight:400;color:var(--orange-dark);transition:.2s}
.faq-item[open] summary::after{content:"\2212"}
.faq-item .faq-a{padding:0 20px 18px;color:var(--muted)}
.product-tools{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-bottom:22px}
.search-box{flex:1;min-width:260px;position:relative}
.search-box input{width:100%;padding:.8rem 1rem .8rem 2.6rem;border:1px solid var(--line);border-radius:999px;font-size:.98rem;background:#fff}
.search-box input:focus{outline:2px solid var(--orange);border-color:transparent}
.search-box::before{content:"🔍";position:absolute;left:14px;top:50%;transform:translateY(-50%)}
.product-list{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media(max-width:1100px){.product-list{grid-template-columns:repeat(3,1fr)}}
@media(max-width:900px){.product-list{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.product-list{grid-template-columns:1fr}}
.product-card{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:var(--shadow-sm);display:flex;flex-direction:column;text-decoration:none;color:inherit;transition:.18s ease}
.product-link:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#c7d3e1}
.product-link:focus-visible{outline:2px solid var(--orange);outline-offset:2px}
.product-card .pc-image{aspect-ratio:16/10;background:var(--steel);overflow:hidden}
.product-card .pc-image img{width:100%;height:100%;object-fit:contain;background:#fff}
.product-card .pc-body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:8px;flex:1}
.product-card h3{margin:0;font-size:1rem;color:var(--navy)}
.product-card .card-link{margin-top:auto;font-weight:800;font-size:.92rem;color:var(--blue)}
.product-meta{display:flex;flex-wrap:wrap;gap:6px}
.product-meta span{background:var(--steel);border:1px solid var(--line);padding:.25rem .5rem;border-radius:6px;font-size:.72rem;font-weight:700;color:var(--muted)}
.table-wrap{overflow-x:auto;background:#fff;border-radius:12px;border:1px solid var(--line);box-shadow:var(--shadow-sm);margin-top:12px}
.table-wrap table{width:100%;border-collapse:collapse;font-size:.85rem;min-width:600px}
.table-wrap th,.table-wrap td{padding:9px 11px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.table-wrap th{background:var(--navy);color:#fff;font-weight:700;white-space:nowrap}
.table-wrap tr:nth-child(even) td{background:#f8fafc}

.product-detail{display:grid;grid-template-columns:minmax(300px,.9fr) minmax(0,1.1fr);gap:34px;align-items:start}
.product-detail-media{position:sticky;top:88px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow-sm)}
.product-detail-media img{width:100%;aspect-ratio:4/3;object-fit:contain;background:#fff}
.product-detail-info{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow-sm)}
.product-detail-info h2{margin:0 0 8px;color:var(--navy);font-size:1.35rem}
.product-detail-info h3{margin:20px 0 8px;color:var(--navy);font-size:1.05rem}
.product-desc{color:var(--muted);margin:0 0 12px}
.spec-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px 18px;margin:12px 0 20px}
.spec-item{display:flex;flex-direction:column;gap:2px;background:var(--steel);border:1px solid var(--line);border-radius:10px;padding:10px 12px}
.spec-item span{font-size:.72rem;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:.04em}
.spec-item strong{color:var(--navy);font-size:.92rem;line-height:1.35}
.detail-actions{display:flex;flex-wrap:wrap;gap:12px;margin:4px 0 18px}
.btn-outline{background:#fff;border:1px solid var(--navy);color:var(--navy)}
.btn-outline:hover{background:var(--navy);color:#fff}
.detail-tables{margin-top:20px}
@media(max-width:860px){.product-detail{grid-template-columns:1fr}.product-detail-media{position:static}}
@media(max-width:600px){.spec-list{grid-template-columns:1fr}}
.note{background:#fff8ea;border:1px solid #f1d89a;color:#6d5420;padding:14px 16px;border-radius:10px;margin:20px 0;font-size:.9rem}
.breadcrumb{margin:0 0 6px;font-size:.86rem;color:var(--muted)}
.breadcrumb a{color:var(--muted)}
.breadcrumb span{color:var(--navy);font-weight:700}
.page-hero .breadcrumb a{color:#d7e3ef}
.page-hero .breadcrumb span{color:#ffd78a}
.page-hero{background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;padding:52px 0 54px}
.page-hero h1{margin:0 0 12px;font-size:clamp(1.9rem,4vw,3rem);line-height:1.12}
.page-hero .lead{max-width:780px;color:#d7e3ef;font-size:1.05rem;margin:0}
/* About and evidence sections */
.capability-grid{display:grid;grid-template-columns:1fr;gap:30px;align-items:start}
.check-list{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.check-list li{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;color:var(--text)}
.check-list li::before{content:"✓";color:var(--orange-dark);font-weight:800;margin-right:8px}
.note-list{list-style:none;margin:0 0 20px;padding:0;color:var(--muted)}
.note-list li{padding-left:20px;position:relative;margin-bottom:8px}
.note-list li::before{content:"—";position:absolute;left:0;color:var(--orange-dark);font-weight:800}
@media(max-width:800px){.capability-grid{grid-template-columns:1fr}}

.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:30px}
@media(max-width:800px){.contact-grid{grid-template-columns:1fr}}
.contact-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm)}
.contact-card h2{margin:0 0 16px;color:var(--navy)}
.contact-line{display:flex;gap:12px;align-items:flex-start;padding:10px 0;border-bottom:1px solid var(--line)}
.contact-line:last-child{border-bottom:0}
.contact-label{min-width:130px;font-weight:800;color:var(--muted);font-size:.85rem}
.contact-value{color:var(--text)}
.qr-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:18px}
.qr-item{text-align:center;background:var(--steel);border:1px solid var(--line);border-radius:12px;padding:14px}
.qr-item img{height:150px;width:150px;margin:0 auto 8px;object-fit:contain;background:#fff;border-radius:8px}
.qr-item span{font-weight:800;color:var(--navy)}
.footer{background:var(--navy);color:#c8d4e0;padding:44px 0 24px;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px;align-items:start}
@media(max-width:800px){.footer-grid{grid-template-columns:1fr}}
.footer h4{color:#fff;margin:0 0 12px;font-size:1rem}
.footer a{color:#c8d4e0}
.footer a:hover{color:var(--orange)}
.footer-links{display:flex;flex-direction:column;gap:8px}
.footer-copy{border-top:1px solid rgba(255,255,255,.12);margin-top:28px;padding-top:18px;font-size:.86rem;color:#93a5b8;display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px}
.footer-logo{height:42px;margin-bottom:14px}
.footer-logo img{height:42px;width:auto}
@media(max-width:600px){
  .section{padding:64px 0}
  .hero{height:auto;min-height:0}
  .hero-inner{padding:64px 0 72px}
}