:root{
  --bg:#f5f5f7;
  --surface:#ffffff;
  --surface-2:#fbfbfc;
  --line:#d9d9e3;
  --ink:#111318;
  --muted:#5f6470;
  --accent:#0a84ff;
  --accent-2:#0f766e;
  --shadow:0 18px 50px rgba(17,19,24,.08);
  --radius:18px;
  --radius-sm:12px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
  text-rendering:optimizeLegibility;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
main{display:block}

.site-header{
  position:sticky;
  top:0;
  z-index:20;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:14px clamp(16px,3vw,40px);
  background:rgba(245,245,247,.82);
  backdrop-filter:saturate(180%) blur(18px);
  border-bottom:1px solid rgba(217,217,227,.9);
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  min-width:max-content;
  font-weight:700;
  letter-spacing:0;
}
.logo-mark{
  width:36px;
  height:36px;
  border-radius:11px;
  background:linear-gradient(135deg,var(--accent),#66b3ff);
  color:#fff;
  display:grid;
  place-items:center;
  font-size:14px;
  box-shadow:0 8px 24px rgba(10,132,255,.18);
}
.site-header nav{
  display:flex;
  gap:10px;
  flex-wrap:wrap;
  justify-content:center;
  font-size:14px;
  color:#272a33;
}
.site-header nav a{
  padding:7px 12px;
  border-radius:999px;
}
.site-header nav a:hover,
.site-header nav a:focus-visible{
  background:rgba(10,132,255,.08);
  color:var(--accent);
  outline:none;
}
.header-actions{display:flex;align-items:center}
.header-phone{
  display:flex;
  flex-direction:column;
  gap:2px;
  padding:10px 14px;
  border:1px solid var(--line);
  border-radius:14px;
  background:rgba(255,255,255,.7);
  white-space:nowrap;
}
.header-phone span{font-size:12px;color:var(--muted)}
.header-phone strong{font-size:14px;line-height:1.2}

main > section,
.section,
.hero,
.application-section,
.product-page,
.article-page{
  width:min(1180px,calc(100% - 32px));
  margin:0 auto;
}
.hero,
.section,
.application-section,
.product-page,
.article-page{
  padding:34px 0;
}

.hero{
  display:grid;
  grid-template-columns:1.05fr .95fr;
  gap:28px;
  align-items:center;
  padding-top:26px;
}
.hero-copy h1,
h1{
  margin:0 0 14px;
  font-size:clamp(34px,4.8vw,62px);
  line-height:1.05;
  letter-spacing:-.02em;
}
h2{
  margin:0 0 12px;
  font-size:clamp(24px,2.5vw,38px);
  line-height:1.12;
  letter-spacing:-.02em;
}
h3{margin:0 0 10px;line-height:1.2}
p{margin:0}
.kicker{
  margin:0 0 12px;
  color:var(--accent);
  font-size:12px;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
}
.lead,.section-intro,.about-profile-copy p,.article-cta p,.news-item p,.process-step p,.topic-card p,.application-copy p,.product-hero-copy .lead{
  color:var(--muted);
  font-size:16px;
}
.hero-actions,
.section-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  margin-top:22px;
}
.button,.text-link{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
}
.button{
  padding:0 18px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--surface);
  box-shadow:0 1px 0 rgba(17,19,24,.02);
}
.button.primary{
  background:var(--accent);
  border-color:var(--accent);
  color:#fff;
}
.button.secondary{background:rgba(255,255,255,.9)}
.text-link{color:var(--accent);font-weight:600}
.text-link:hover{text-decoration:underline}

.visual-mosaic,
.product-grid,
.gallery-grid,
.home-highlights,
.application-cards,
.topic-grid,
.news-list,
.spec-card-grid,
.service-process,
.contact-phone-grid,
.contact-address-grid{
  display:grid;
  gap:14px;
}
.visual-mosaic{
  grid-template-columns:1.2fr .8fr;
  grid-template-rows:220px 220px;
}
.mosaic-img,
.product-image,
.application-image,
.gallery-card img,
.product-hero-image img,
.about-visual img{
  width:100%;
  height:100%;
  object-fit:cover;
  border-radius:var(--radius);
  background:var(--surface);
}
.mosaic-1{grid-row:1 / span 2}
.mosaic-2{grid-column:2}
.mosaic-3{grid-column:2}

.home-highlights{
  grid-template-columns:repeat(4,minmax(0,1fr));
  padding-bottom:18px;
}
.home-highlights article,
.topic-card,
.process-step,
.news-item,
.application-cards article,
.contact-card,
.spec-card-grid article,
.gallery-card,
.product-tile,
.info-panel,
.feature-panel{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.home-highlights article,
.topic-card,
.process-step,
.news-item,
.contact-card,
.spec-card-grid article{
  padding:16px;
}
.home-highlights span,
.topic-card span,
.process-step span,
.news-item span,
.spec-card-grid span{
  display:inline-flex;
  margin-bottom:10px;
  color:var(--accent);
  font-weight:700;
}

.section-heading{
  margin-bottom:18px;
}

.about-profile,
.product-hero-detail,
.application-section{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px;
  align-items:center;
}
.about-profile-copy{
  padding:2px 0;
}
.about-proof,
.feature-chips,
.about-bullets{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:14px;
}
.about-proof span,
.feature-chips em,
.about-bullets span{
  font-style:normal;
  font-size:12px;
  padding:7px 10px;
  border-radius:999px;
  border:1px solid var(--line);
  background:var(--surface-2);
}
.feature-chips em{color:#2f3748}

.product-grid{
  grid-template-columns:repeat(2,minmax(0,1fr));
}
.product-tile{
  display:grid;
  grid-template-columns:170px 1fr;
  gap:14px;
  padding:14px;
}
.product-copy span{color:var(--accent);font-weight:700}
.product-detail-link{grid-column:1 / -1}

.model-table-wrap{
  overflow:auto;
  border:1px solid var(--line);
  border-radius:var(--radius);
  background:var(--surface);
  box-shadow:var(--shadow);
}
.model-table{
  width:100%;
  border-collapse:collapse;
  min-width:820px;
}
.model-table th,
.model-table td{
  padding:14px 16px;
  border-bottom:1px solid #ececf2;
  text-align:left;
  vertical-align:top;
}
.model-table th{
  position:sticky;
  top:0;
  background:#f7f8fa;
  font-size:14px;
}
.model-table tr:last-child td{border-bottom:none}

.gallery-grid{
  grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
}
.gallery-card{
  overflow:hidden;
  margin:0;
}
.gallery-card img{
  aspect-ratio:4/3;
  object-fit:contain;
  padding:10px;
  background:#fff;
  border-radius:0;
}
.gallery-card figcaption{
  padding:10px 12px 12px;
  font-size:14px;
  font-weight:600;
  color:#2b2f38;
}

.article-cta{
  margin-top:24px;
  padding:22px;
  border-radius:var(--radius);
  background:linear-gradient(180deg,#ffffff,#f8f9fb);
  border:1px solid var(--line);
  box-shadow:var(--shadow);
}

.article-detail{max-width:960px;margin:0 auto}
.article-cover img{aspect-ratio:16/9;object-fit:cover}
.article-page h1{font-size:clamp(30px,4vw,52px)}

.news-item time{
  display:block;
  margin-bottom:10px;
  color:var(--accent-2);
  font-size:12px;
  font-weight:700;
}
.news-item ul{
  margin:12px 0 0;
  padding-left:18px;
  color:var(--muted);
}

.breadcrumb,
.article-meta{
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  align-items:center;
  color:var(--muted);
  font-size:13px;
  margin-bottom:14px;
}
.breadcrumb span{color:#9aa0aa}
.article-meta{margin:12px 0 22px}
.article-detail section{
  margin-top:22px;
}
.article-detail section h2{
  font-size:24px;
  margin-bottom:10px;
}
.article-detail section p{
  color:var(--muted);
}

.contact-band{
  padding-bottom:52px;
}
.contact-panel{
  display:grid;
  gap:14px;
}
.contact-phone-grid,
.contact-address-grid{
  grid-template-columns:repeat(2,minmax(0,1fr));
}
.contact-card{
  padding:18px;
}
.contact-card span{
  display:block;
  margin-bottom:8px;
  color:var(--muted);
  font-size:12px;
  letter-spacing:.08em;
  text-transform:uppercase;
}
.contact-card strong{font-size:18px;line-height:1.35}

footer{
  width:min(1180px,calc(100% - 32px));
  margin:0 auto;
  padding:0 0 36px;
  color:var(--muted);
  font-size:13px;
}

@media (max-width: 980px){
  .site-header{
    align-items:flex-start;
    flex-direction:column;
  }
  .header-actions{width:100%}
  .header-phone{width:100%}
  .hero,
  .about-profile,
  .product-hero-detail,
  .application-section,
  .product-grid,
  .home-highlights,
  .contact-phone-grid,
  .contact-address-grid{
    grid-template-columns:1fr;
  }
  .visual-mosaic{
    grid-template-columns:1fr 1fr;
    grid-template-rows:180px 180px;
  }
}

@media (max-width: 720px){
  main > section,
  .section,
  .hero,
  .application-section,
  .product-page,
  .article-page,
  footer{
    width:min(100% - 20px,1180px);
  }
  .hero,
  .section,
  .application-section,
  .product-page,
  .article-page{
    padding:22px 0;
  }
  .site-header{
    padding:12px 10px;
  }
  .site-header nav{
    justify-content:flex-start;
    overflow:auto;
    width:100%;
    padding-bottom:2px;
    scrollbar-width:none;
  }
  .site-header nav::-webkit-scrollbar{display:none}
  .visual-mosaic{
    grid-template-columns:1fr;
    grid-template-rows:auto;
  }
  .mosaic-1,
  .mosaic-2,
  .mosaic-3{
    grid-column:auto;
    grid-row:auto;
    aspect-ratio:4/3;
  }
  .product-tile{
    grid-template-columns:1fr;
  }
  .product-tile .product-image{
    aspect-ratio:16/10;
  }
  .contact-card strong{
    font-size:16px;
  }
}