:root{--blue:#1160ad;--blue2:#0b78c8;--green:#54b848;--ink:#26364a;--muted:#65758b;--bg:#f4f8fc;--card:#fff;--line:#dce7f3;--shadow:0 16px 40px rgba(12,62,120,.12)}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:#fff}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{width:min(1180px,92vw);margin:0 auto}
.topbar{height:78px;background:rgba(255,255,255,.96);box-shadow:0 2px 18px rgba(0,0,0,.06);position:sticky;top:0;z-index:50}
.nav{height:78px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;gap:12px;align-items:center;font-weight:800;color:var(--blue)}
.brand img{height:38px;object-fit:contain}.brand span{white-space:nowrap}
.menu{display:flex;gap:42px;align-items:center}
.menu a{font-size:16px;color:#26364a;position:relative;padding:28px 0}
.menu a.active,.menu a:hover{color:var(--blue)}
.menu a.active:after,.menu a:hover:after{content:"";position:absolute;left:0;right:0;bottom:18px;height:3px;background:linear-gradient(90deg,var(--blue),var(--green));border-radius:2px}
.mobile-btn{display:none;border:1px solid var(--line);background:#fff;border-radius:8px;padding:8px 12px;color:var(--blue)}

.hero{position:relative;overflow:hidden;background:#eef5fb}
.slider{position:relative;height:620px}
.slide{position:absolute;inset:0;opacity:0;transition:opacity .7s ease;background:#fff;display:flex;align-items:center;justify-content:center;overflow:hidden}
.slide.active{opacity:1;z-index:1}.slide img{width:100%;height:100%;object-fit:cover}
.slide:after{content:"";position:absolute;left:0;right:0;bottom:0;height:100px;background:linear-gradient(180deg,rgba(255,255,255,0),rgba(255,255,255,.95))}
.slide-caption{position:absolute;left:7%;bottom:70px;z-index:4;background:rgba(255,255,255,.88);border:1px solid rgba(17,96,173,.18);box-shadow:0 16px 40px rgba(12,62,120,.12);border-radius:18px;padding:18px 24px;display:flex;flex-direction:column;gap:6px}
.slide-caption strong{font-size:30px;color:var(--blue)}.slide-caption span{font-size:15px;color:var(--muted)}
.slider-dots{position:absolute;left:50%;bottom:28px;transform:translateX(-50%);display:flex;gap:10px;z-index:5}
.slider-dots button{width:11px;height:11px;border-radius:50%;border:0;background:rgba(17,96,173,.35);cursor:pointer}.slider-dots button.active{width:34px;border-radius:99px;background:linear-gradient(90deg,var(--blue),var(--green))}

.section{padding:86px 0}.section.soft{background:linear-gradient(180deg,#f7fbff 0,#fff 100%)}
.section-title{text-align:center;margin-bottom:42px}.section-title h2{font-size:38px;letter-spacing:3px;color:var(--blue);margin:0 0 10px}.section-title p{text-transform:uppercase;letter-spacing:2px;color:var(--muted);margin:0}
.page-hero{padding:78px 0;background:radial-gradient(circle at 10% 20%,rgba(28,128,203,.16),transparent 36%),linear-gradient(135deg,#f6fbff,#fff);border-bottom:1px solid var(--line)}
.page-hero h1{font-size:42px;color:var(--blue);margin:0 0 10px}.page-hero p{margin:0;color:var(--muted);font-size:17px}
.ppt-card{background:#fff;border-radius:28px;box-shadow:var(--shadow);border:1px solid var(--line);overflow:hidden;position:relative}
.ppt-card:before{content:"";position:absolute;left:-5%;bottom:-20px;width:110%;height:90px;background:linear-gradient(8deg,transparent 35%,rgba(28,133,207,.2) 35% 50%,rgba(80,184,72,.22) 50% 60%,transparent 60%);pointer-events:none}
.brand-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;padding:38px}
.brand-block.single{padding:38px;margin-bottom:34px}.brand-block h3{height:32px;margin:0 0 28px;color:#fff;font-size:17px;padding:6px 20px;background:linear-gradient(90deg,var(--blue),rgba(17,96,173,.08));border-radius:0 18px 18px 0}
.logos{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.logos.big{grid-template-columns:repeat(5,1fr)}
.logo-card{min-height:78px;border:1px solid #e3edf7;border-radius:14px;padding:16px 12px;background:linear-gradient(180deg,#fff,#f8fbff);display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;transition:.2s}
.logo-card:hover{transform:translateY(-4px);box-shadow:0 12px 26px rgba(17,96,173,.12);border-color:rgba(17,96,173,.35)}
.logo-card b{font-size:16px;color:var(--blue);line-height:1.2}.logo-card span{font-size:12px;color:var(--muted);margin-top:8px}

.about-section .container{display:grid;grid-template-columns:1fr 1fr;gap:42px;align-items:start}
.about-image img{border-radius:28px;box-shadow:var(--shadow);border:1px solid var(--line)}
.about-text{padding:42px}.about-text .label{color:var(--blue);font-weight:800;letter-spacing:2px}.about-text h2{font-size:32px;margin:10px 0 18px;color:var(--blue)}.about-text p{line-height:1.9;color:#4a5d73}
.about-points{display:grid;gap:14px;margin-top:24px}.about-points div{background:#f5faff;border-left:4px solid var(--blue);padding:16px;border-radius:12px}.about-points b{display:block;margin-bottom:6px}.about-points span{color:var(--muted)}

.product-tabs{display:flex;gap:14px;justify-content:center;margin-bottom:34px;flex-wrap:wrap}
.tab-btn{border:1px solid var(--line);padding:12px 26px;border-radius:999px;background:#fff;color:var(--blue);font-weight:700;cursor:pointer}.tab-btn.active,.tab-btn:hover{background:linear-gradient(90deg,var(--blue),var(--blue2));color:#fff}
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.product{background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:0 10px 26px rgba(12,62,120,.08);overflow:hidden;transition:.2s}.product:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.product img{width:100%;height:230px;object-fit:cover;background:#f5faff}.product-body{padding:22px}.product-body h3{margin:0 0 8px;font-size:23px;color:var(--blue)}.country{font-size:13px;color:var(--muted);margin-bottom:12px}.product-body p{color:#4e6175;line-height:1.65;min-height:52px}.more{color:var(--blue);font-weight:700}

.product-detail-hero{padding:70px 0;background:linear-gradient(135deg,#f6fbff,#fff);border-bottom:1px solid var(--line)}
.detail-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:center}.detail-grid h1{font-size:54px;color:var(--blue);margin:16px 0 12px}.detail-grid p{font-size:20px;color:var(--muted)}.detail-grid img{border-radius:30px;box-shadow:var(--shadow);border:1px solid var(--line)}
.crumb{color:var(--muted)}.crumb a{color:var(--blue)}.detail-actions{display:flex;gap:14px;margin-top:28px}
.btn{display:inline-flex;align-items:center;justify-content:center;border:none;border-radius:999px;background:linear-gradient(90deg,var(--blue),var(--blue2));color:#fff;padding:13px 24px;font-weight:700;cursor:pointer}.btn.ghost{background:#fff;color:var(--blue);border:1px solid var(--line)}
.detail-content{display:grid;grid-template-columns:1fr;gap:44px}.detail-card{padding:40px}.detail-card h2{color:var(--blue)}.detail-card p,.detail-card li{line-height:1.9;color:#4a5d73}
.related h2{color:var(--blue)}.related-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.related-card{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:0 8px 20px rgba(12,62,120,.08)}.related-card img{height:130px;width:100%;object-fit:cover}.related-card span{display:block;padding:14px;color:var(--blue);font-weight:700}

.contact-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}.contact-card{background:#fff;border:1px solid var(--line);border-radius:26px;padding:34px;box-shadow:var(--shadow)}.contact-card h3{color:var(--blue);margin-top:0}.contact-card h2{font-size:32px;color:var(--blue)}.hint{color:var(--muted);font-size:13px}
.copy-phone{border:0;background:transparent;color:inherit;font:inherit;cursor:pointer;padding:0}.copy-phone.big{color:var(--blue);font-weight:800}.copy-phone:hover{text-decoration:underline}
.toast{position:fixed;left:50%;bottom:38px;transform:translateX(-50%);background:rgba(16,32,48,.92);color:#fff;padding:12px 20px;border-radius:999px;display:none;z-index:1000}

.footer{background:#123a66;color:#dcecff;padding:54px 0}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:32px}.footer h3{color:#fff}.footer a{color:#dcecff}.small{font-size:13px;color:#a9bfd5}.backtop{display:none;position:fixed;right:24px;bottom:24px;width:46px;height:46px;border:0;border-radius:50%;background:var(--blue);color:#fff;font-size:22px;box-shadow:var(--shadow);cursor:pointer}

@media(max-width:900px){.mobile-btn{display:block}.menu{display:none;position:absolute;left:0;right:0;top:78px;background:#fff;box-shadow:var(--shadow);padding:20px;flex-direction:column;gap:0}.menu.open{display:flex}.menu a{padding:14px}.hero .slider{height:420px}.brand-grid,.about-section .container,.detail-grid,.contact-cards{grid-template-columns:1fr}.logos,.logos.big{grid-template-columns:repeat(2,1fr)}.product-grid{grid-template-columns:1fr}.related-grid{grid-template-columns:repeat(2,1fr)}.slide-caption{left:5%;right:5%;bottom:56px}.slide-caption strong{font-size:22px}.footer-grid{grid-template-columns:1fr}.detail-grid h1{font-size:38px}}


/* v3 adjustments */
.solution-section{background:#fff;padding-top:70px}
.solution-text{max-width:840px}
.solution-text h1{font-size:42px;line-height:1.22;color:var(--blue);margin:0 0 24px}
.solution-text p{font-size:18px;line-height:1.9;color:#4a5d73;margin:0 0 26px}
.feature-list{display:flex;gap:20px;flex-wrap:wrap}
.feature{background:#fff;border-left:5px solid var(--blue);box-shadow:0 12px 32px rgba(12,62,120,.09);padding:18px 28px;border-radius:16px;font-weight:700;color:#31445c}
.about-onecol{display:block!important}
.about-onecol .top-image{margin-bottom:42px}
.about-onecol .top-image img{width:100%;max-height:560px;object-fit:cover;object-position:center;border-radius:30px}
.about-onecol .about-text{max-width:1120px;margin:0 auto;padding:48px 58px}
.about-onecol .about-text p{text-align:left;font-size:17px;line-height:2.05;margin:0 0 20px;color:#4f6072}
.brand-page .logo-card span{font-size:14px}
.detail-card ul{margin-bottom:34px}
.detail-card p{font-size:17px}
@media(max-width:900px){
  .solution-text h1{font-size:32px}
  .feature-list{display:grid;grid-template-columns:1fr}
  .about-onecol .about-text{padding:30px 24px}
}


/* v4 fine tuning */
.page-hero.compact{padding:42px 0 34px}
.brand-page{margin-top:-16px}
.brand-block.single{padding:34px;margin-bottom:28px}
.brand-block.single:last-child{margin-bottom:0}
.brand-page .ppt-card{border-radius:24px}
.brand-page .logos.big{gap:18px 22px}
.brand-page .logo-card{min-height:74px}

/* About page: image on top, no forced crop blank, intro + indented paragraphs */
.about-onecol .top-image{margin-bottom:32px;background:transparent;box-shadow:none;border:0}
.about-onecol .top-image img{width:100%;height:auto;max-height:none;object-fit:contain;object-position:center;border-radius:24px;box-shadow:var(--shadow);border:1px solid var(--line);background:#fff}
.about-intro{max-width:1120px;margin:0 auto 24px;background:#fff;border:1px solid var(--line);border-radius:22px;padding:28px 36px;box-shadow:0 10px 28px rgba(12,62,120,.08)}
.about-intro h2{margin:0 0 12px;color:var(--blue);font-size:28px}
.about-intro p{margin:0;color:#4f6072;line-height:1.9;text-indent:2em}
.about-onecol .about-text{padding:42px 50px}
.about-onecol .about-text h2,.about-onecol .about-text .label{display:none}
.about-onecol .about-text p{text-indent:2em;font-size:17px;line-height:2.08;margin:0 0 18px}

/* Contact */
.contact-card .hint{display:none}

/* Product detail compact + carousel ready */
.product-detail-hero{padding:44px 0}
.detail-grid{gap:34px}
.detail-grid h1{font-size:48px}
.detail-grid img{border-radius:24px}
.section:has(.detail-content){padding-top:48px}
.detail-card{padding:34px 38px}
.detail-card ul{margin-bottom:24px}
.product-gallery{position:relative;border-radius:26px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);background:#fff}
.product-gallery .gallery-track{display:flex;transition:transform .35s ease}
.product-gallery img{min-width:100%;width:100%;height:360px;object-fit:contain;background:#fff;border-radius:0;box-shadow:none;border:0}
.gallery-arrow{position:absolute;top:50%;transform:translateY(-50%);width:38px;height:38px;border:0;border-radius:50%;background:rgba(17,96,173,.86);color:#fff;font-size:28px;line-height:1;cursor:pointer;display:none}
.product-gallery.has-multiple .gallery-arrow{display:block}
.gallery-arrow.prev{left:14px}.gallery-arrow.next{right:14px}
.related{margin-top:4px}
.related-grid{gap:18px}
.related-card img{height:112px;object-fit:cover}

@media(max-width:900px){
  .page-hero.compact{padding:32px 0 26px}
  .about-intro{padding:24px}
  .about-onecol .about-text{padding:28px 24px}
  .product-gallery img{height:260px}
}


/* v5 alignment fixes */
.about-section{padding-top:42px}
.about-onecol{max-width:980px}
.about-onecol .top-image{margin:0 auto 18px}
.about-onecol .top-image img{width:100%;height:auto;max-height:none;object-fit:contain;border-radius:20px}
.about-intro{display:none}
.about-onecol .about-text{width:100%;max-width:none;margin:0 auto;padding:38px 46px;border-radius:20px}
.about-onecol .about-text p{font-size:16px;line-height:2.05;text-indent:2em}
.brand-home{padding-top:70px}
.brand-home .section-title{margin-bottom:30px}
.brand-home .brand-block.single{margin-bottom:34px}
.brand-home .brand-block.single:last-child{margin-bottom:0}
.brand-home .logos.big{grid-template-columns:repeat(5,1fr)}
@media(max-width:900px){
  .about-onecol{max-width:92vw}
  .about-section{padding-top:28px}
  .about-onecol .about-text{padding:28px 22px}
  .brand-home .logos.big{grid-template-columns:repeat(2,1fr)}
}


/* v6 product center spacing */
.product-list-section{
  padding-top:34px;
}
.product-list-section .product-tabs{
  margin-bottom:34px;
}
@media(max-width:900px){
  .product-list-section{
    padding-top:28px;
  }
}

/* v8 logo and product description */
.brand img{
  width:220px;
  height:54px;
  object-fit:contain;
}
.nav .brand{
  min-width:230px;
}
.detail-card p{
  line-height:2.05;
}


/* v9 logo enlarge + unit directory */
.topbar{height:92px}
.nav{height:92px}
.brand img{
  width:300px;
  height:72px;
  object-fit:contain;
}
.nav .brand{
  min-width:320px;
}
.menu a{padding:35px 0}
.menu a.active:after,.menu a:hover:after{bottom:25px}
.unit-list-block{margin-top:34px}
.unit-logos .unit-card{
  min-height:68px;
  padding:14px 10px;
}
.unit-logos .unit-card b{
  font-size:15px;
  line-height:1.35;
}
@media(max-width:900px){
  .topbar,.nav{height:78px}
  .brand img{width:210px;height:54px}
  .nav .brand{min-width:auto}
  .menu{top:78px}
  .menu a{padding:14px}
}

/* v10 units as standalone nav page */
.menu{gap:32px}
.units-page .unit-list-block{margin-top:0}
.units-page .unit-logos{grid-template-columns:repeat(5,1fr)}
.units-page .unit-card{cursor:default}
.units-page .unit-card:hover{transform:none}
@media(max-width:1100px){.menu{gap:24px}.menu a{font-size:15px}}
@media(max-width:900px){.units-page .unit-logos{grid-template-columns:repeat(2,1fr)}}


/* v11 unified top spacing */
.page-hero{
  padding:56px 0 44px;
}
.page-hero.compact{
  padding:56px 0 44px;
}
.section.soft{
  padding-top:42px;
}
.units-page{
  margin-top:0;
}
.units-page .unit-list-block{
  margin-top:0;
}
.brand-page{
  margin-top:0;
}
.product-list-section{
  padding-top:42px;
}
.about-section{
  padding-top:42px;
}
@media(max-width:900px){
  .page-hero,
  .page-hero.compact{
    padding:38px 0 30px;
  }
  .section.soft,
  .product-list-section,
  .about-section{
    padding-top:30px;
  }
}

/* v12 text and banner adjustments */
.page-hero p{
  max-width:900px;
}
.hero .slide img{
  object-fit:cover;
}

/* v13 icp link and refreshed banners */
.footer a[target="_blank"]{
  text-decoration: underline;
}


/* v16 fix: keep original product-center images, only refresh homepage banners */
.slide-caption{
  display:none;
}
.footer{
  padding:54px 0 28px;
}
.footer-bottom{
  width:min(1180px,92vw);
  margin:34px auto 0;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.18);
  color:#b9cce1;
  font-size:14px;
  text-align:center;
}
.footer-bottom a{
  color:#dcecff;
  text-decoration:underline;
}


/* v17 final banner fix */
.slide-caption{
  display:none !important;
}
.hero .slide img{
  object-fit:cover;
}
.footer{
  padding:54px 0 28px;
}
.footer-bottom{
  width:min(1180px,92vw);
  margin:34px auto 0;
  padding-top:20px;
  border-top:1px solid rgba(255,255,255,.18);
  color:#b9cce1;
  font-size:14px;
  text-align:center;
}
.footer-bottom a{
  color:#dcecff;
  text-decoration:underline;
}


/* v18 product center toolbar + search */
.product-toolbar{
  width:min(1180px,92vw);
  margin:42px auto 34px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}

.product-toolbar .product-tabs,
.product-toolbar .product-filter,
.product-toolbar .tabs{
  margin:0;
  justify-content:flex-start;
}

.product-search{
  margin-left:auto;
}

.product-search input{
  width:280px;
  height:46px;
  border:1px solid #d8e5f2;
  border-radius:999px;
  padding:0 20px;
  font-size:15px;
  color:#1f3550;
  background:#fff;
  outline:none;
  transition:all .2s ease;
  box-shadow:0 8px 24px rgba(20,96,160,.06);
}

.product-search input::placeholder{
  color:#8a9aab;
}

.product-search input:focus{
  border-color:#1267b1;
  box-shadow:0 0 0 4px rgba(18,103,177,.12);
}

@media(max-width:900px){
  .product-toolbar{
    flex-direction:column;
    align-items:stretch;
    margin:30px auto 24px;
  }
  .product-search input{
    width:100%;
  }
}


/* v19 unified product center spacing - keep same as other pages */
.product-toolbar{
  width:min(1180px,92vw);
  margin:34px auto 28px !important;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}

.product-toolbar .product-tabs,
.product-toolbar .product-filter,
.product-toolbar .tabs{
  margin:0 !important;
  justify-content:flex-start;
}

.product-list-section,
.section.product-list-section{
  padding-top:0 !important;
}

.products,
.product-grid{
  margin-top:0 !important;
}

.page-hero + .product-toolbar,
.page-hero + .section,
.page-hero + .product-list-section{
  margin-top:0 !important;
}

@media(max-width:900px){
  .product-toolbar{
    margin:26px auto 22px !important;
    gap:16px;
  }
}

/* v21 homepage hero banner: light technology corporate style */
.hero{background:#eef9fc;}
.slider{width:100%;max-width:none;border-radius:0;}
.hero .slide img,.slider .slide img{
  width:100%;
  height:auto;
  aspect-ratio:1920/760;
  object-fit:cover;
  display:block;
}
.slider-dots{bottom:22px;}

/* v22 20260524 homepage scene hero banner */
.hero{background:#eef9fc;}
.slider{width:100%;max-width:none;border-radius:0;}
.hero .slide img,.slider .slide img{
  width:100%;
  height:auto;
  aspect-ratio:1920/760;
  object-fit:cover;
  display:block;
}
.slider-dots{bottom:22px;}

/* v23 20260527: homepage + product images with light tech scene */
.hero{background:#eef9fc;}
.slider{width:100%;max-width:none;border-radius:0;}
.hero .slide img,.slider .slide img{width:100%;height:auto;aspect-ratio:1920/760;object-fit:cover;display:block;}
.slider-dots{bottom:22px;}

/* v24 20260606: 6 home banners + product images */
.hero{background:#eef9fc;}
.slider{width:100%;max-width:none;border-radius:0;}
.hero .slide img,.slider .slide img{width:100%;height:auto;aspect-ratio:1920/760;object-fit:cover;display:block;}
.slider-dots{bottom:22px;}


/* v26 20260608: 首页轮播使用用户定稿原图；只替换链接，不重新生成图片 */
.hero{background:#eef9fc;}
.hero .slider{width:100%;height:auto;aspect-ratio:1920/760;max-height:none;border-radius:0;}
.hero .slide{background:#eef9fc;}
.hero .slide img{width:100%;height:100%;object-fit:contain;display:block;background:#eef9fc;}
@media(max-width:900px){.hero .slider{height:auto;aspect-ratio:1920/760;}}