:root{
  --brand:#c8102e;
  --brand-dark:#8f0b20;
  --brand-light:#f5d0d6;
  --accent:#1a1a2e;
  --accent-2:#16213e;
  --text:#22252b;
  --text-soft:#5a616e;
  --bg:#ffffff;
  --bg-soft:#f7f8fa;
  --bg-card:#ffffff;
  --border:#e6e8ec;
  --shadow:0 4px 20px rgba(20,24,40,.08);
  --shadow-lg:0 12px 40px rgba(20,24,40,.14);
  --radius:14px;
  --max:1200px;
}
html[data-theme="dark"]{
  --brand:#ff3b5c;
  --brand-dark:#c8102e;
  --brand-light:#3a1a22;
  --accent:#e8ecf5;
  --accent-2:#c9d0e0;
  --text:#e6e8ee;
  --text-soft:#a3aab8;
  --bg:#101218;
  --bg-soft:#181b23;
  --bg-card:#1c2029;
  --border:#2a2f3a;
  --shadow:0 4px 20px rgba(0,0,0,.4);
  --shadow-lg:0 12px 40px rgba(0,0,0,.55);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  transition:background .3s,color .3s;
}
img,svg{max-width:100%;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s}
a:hover{color:var(--brand-dark)}
ul,ol{list-style:none}
.container{width:100%;max-width:var(--max);margin:0 auto;padding:0 20px}
.section{padding:72px 0}
.section--soft{background:var(--bg-soft)}
.section-head{text-align:center;max-width:820px;margin:0 auto 44px}
.section-head .eyebrow{display:inline-block;font-size:13px;letter-spacing:.14em;color:var(--brand);font-weight:700;text-transform:uppercase;margin-bottom:12px}
.section-head h2{font-size:clamp(24px,3.4vw,34px);line-height:1.3;color:var(--accent);margin-bottom:14px;font-weight:800}
.section-head p{color:var(--text-soft);font-size:16px}
h3{font-size:20px;color:var(--accent);margin-bottom:10px;font-weight:700}
h4{font-size:16px;color:var(--accent);margin-bottom:8px;font-weight:700}
p{color:var(--text-soft);margin-bottom:14px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:12px 26px;border-radius:999px;font-weight:700;font-size:15px;border:2px solid transparent;cursor:pointer;transition:.25s;background:var(--brand);color:#fff}
.btn:hover{background:var(--brand-dark);color:#fff;transform:translateY(-2px);box-shadow:var(--shadow-lg)}
.btn--ghost{background:transparent;color:var(--brand);border-color:var(--brand)}
.btn--ghost:hover{background:var(--brand);color:#fff}

/* Header */
.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);transition:.3s}
html[data-theme="dark"] .site-header{background:rgba(16,18,24,.92)}
.site-header.scrolled{box-shadow:var(--shadow)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:20px}
.logo{display:flex;align-items:center;gap:10px;font-weight:900;font-size:20px;color:var(--accent);flex-shrink:0}
.logo .logo-mark{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--brand),var(--brand-dark));display:flex;align-items:center;justify-content:center;color:#fff;font-size:16px;font-weight:900;letter-spacing:-.5px}
.logo small{display:block;font-size:11px;color:var(--text-soft);font-weight:500;letter-spacing:.02em}
.main-nav{display:flex;gap:4px;align-items:center}
.main-nav a{padding:8px 14px;border-radius:8px;font-size:15px;font-weight:600;color:var(--text);white-space:nowrap}
.main-nav a:hover{background:var(--bg-soft);color:var(--brand)}
.header-tools{display:flex;align-items:center;gap:10px}
.search-box{display:flex;align-items:center;background:var(--bg-soft);border:1px solid var(--border);border-radius:999px;padding:6px 6px 6px 16px;transition:.25s}
.search-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(200,16,46,.12)}
.search-box input{border:none;background:transparent;outline:none;font-size:14px;color:var(--text);width:130px}
.search-box button{border:none;background:var(--brand);color:#fff;width:32px;height:32px;border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.2s}
.search-box button:hover{background:var(--brand-dark)}
.icon-btn{width:40px;height:40px;border-radius:50%;border:1px solid var(--border);background:var(--bg-card);color:var(--text);cursor:pointer;display:flex;align-items:center;justify-content:center;transition:.2s}
.icon-btn:hover{border-color:var(--brand);color:var(--brand)}
.menu-toggle{display:none}
.mobile-nav{display:none;position:fixed;inset:68px 0 0 0;background:var(--bg);z-index:999;padding:24px 20px;overflow-y:auto}
.mobile-nav.open{display:block}
.mobile-nav a{display:block;padding:14px 0;border-bottom:1px solid var(--border);font-size:16px;font-weight:600;color:var(--text)}
.mobile-nav a:hover{color:var(--brand)}

/* Breadcrumb */
.breadcrumb{background:var(--bg-soft);border-bottom:1px solid var(--border);padding:12px 0;font-size:13px}
.breadcrumb ol{display:flex;flex-wrap:wrap;gap:6px;align-items:center;list-style:none}
.breadcrumb li{color:var(--text-soft)}
.breadcrumb li+li::before{content:"/";margin-right:6px;color:var(--border)}
.breadcrumb a{color:var(--text-soft)}
.breadcrumb a:hover{color:var(--brand)}

/* Hero */
.hero{position:relative;padding:56px 0 64px;background:linear-gradient(160deg,var(--bg-soft) 0%,var(--bg) 100%);overflow:hidden}
.hero::before{content:"";position:absolute;top:-120px;right:-120px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(200,16,46,.12),transparent 70%);pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(28px,4.4vw,46px);line-height:1.22;color:var(--accent);font-weight:900;margin-bottom:18px;letter-spacing:-.01em}
.hero h1 .hl{color:var(--brand);position:relative}
.hero-lead{font-size:17px;color:var(--text-soft);margin-bottom:22px;max-width:560px}
.hero-answer{background:var(--bg-card);border:1px solid var(--border);border-left:4px solid var(--brand);border-radius:12px;padding:18px 20px;margin-bottom:26px;box-shadow:var(--shadow)}
.hero-answer strong{color:var(--accent)}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:28px}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;max-width:520px}
.stat{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;padding:16px;text-align:center;box-shadow:var(--shadow)}
.stat .num{font-size:26px;font-weight:900;color:var(--brand);line-height:1.2}
.stat .label{font-size:12px;color:var(--text-soft);margin-top:4px}
.hero-visual{position:relative}
.hero-carousel{background:var(--bg-card);border:1px solid var(--border);border-radius:20px;overflow:hidden;box-shadow:var(--shadow-lg);position:relative}
.carousel-track{position:relative;aspect-ratio:4/3}
.carousel-slide{position:absolute;inset:0;opacity:0;transition:opacity .6s;display:flex;flex-direction:column;justify-content:flex-end;padding:24px}
.carousel-slide.active{opacity:1}
.carousel-slide h3{color:#fff;font-size:20px;margin-bottom:6px;text-shadow:0 2px 10px rgba(0,0,0,.4)}
.carousel-slide p{color:rgba(255,255,255,.9);font-size:13px;margin:0;text-shadow:0 1px 6px rgba(0,0,0,.4)}
.slide-1{background:linear-gradient(135deg,#1a1a2e,#c8102e)}
.slide-2{background:linear-gradient(135deg,#16213e,#0f3460)}
.slide-3{background:linear-gradient(135deg,#2d1b3d,#8f0b20)}
.carousel-dots{position:absolute;bottom:14px;left:0;right:0;display:flex;justify-content:center;gap:8px;z-index:2}
.carousel-dots button{width:9px;height:9px;border-radius:50%;border:none;background:rgba(255,255,255,.4);cursor:pointer;transition:.2s;padding:0}
.carousel-dots button.active{background:#fff;width:22px;border-radius:5px}

/* Cards */
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);transition:.3s;height:100%}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--brand)}
.card .icon{width:48px;height:48px;border-radius:12px;background:var(--brand-light);color:var(--brand);display:flex;align-items:center;justify-content:center;margin-bottom:16px;font-size:22px;font-weight:900}
.card h3{margin-bottom:8px}
.card p{margin-bottom:0;font-size:14.5px}

/* About */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.about-text p{font-size:15.5px}
.about-facts{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:24px}
.fact{background:var(--bg-soft);border-radius:12px;padding:16px;border:1px solid var(--border)}
.fact .num{font-size:22px;font-weight:900;color:var(--brand)}
.fact .label{font-size:13px;color:var(--text-soft)}
.timeline{position:relative;padding-left:26px}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:var(--border)}
.timeline-item{position:relative;padding-bottom:24px}
.timeline-item::before{content:"";position:absolute;left:-26px;top:5px;width:16px;height:16px;border-radius:50%;background:var(--brand);border:3px solid var(--bg-card);box-shadow:0 0 0 2px var(--brand)}
.timeline-item .year{font-weight:900;color:var(--brand);font-size:15px}
.timeline-item h4{margin:2px 0 4px}
.timeline-item p{font-size:14px;margin:0}

/* Products */
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.product-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.3s;display:flex;flex-direction:column}
.product-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.product-thumb{aspect-ratio:16/10;position:relative;overflow:hidden}
.product-thumb svg{width:100%;height:100%}
.product-body{padding:20px;flex:1;display:flex;flex-direction:column}
.product-body .tag{display:inline-block;font-size:11px;font-weight:700;color:var(--brand);background:var(--brand-light);padding:3px 10px;border-radius:999px;margin-bottom:10px;align-self:flex-start}
.product-body h3{font-size:17px;margin-bottom:8px}
.product-body p{font-size:14px;flex:1;margin-bottom:14px}
.product-body .more{font-weight:700;font-size:14px}

/* Solutions */
.solution-list{display:grid;gap:20px}
.solution-item{display:grid;grid-template-columns:auto 1fr;gap:20px;background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.solution-item .idx{width:52px;height:52px;border-radius:14px;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px;font-weight:900;flex-shrink:0}
.solution-item h3{margin-bottom:6px}
.solution-item p{margin-bottom:10px}
.solution-item ul{display:flex;flex-wrap:wrap;gap:8px}
.solution-item ul li{font-size:13px;background:var(--bg-soft);border:1px solid var(--border);padding:4px 12px;border-radius:999px;color:var(--text-soft)}

/* Cases */
.case-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);display:flex;flex-direction:column}
.case-card .case-tag{font-size:12px;color:var(--brand);font-weight:700;margin-bottom:8px}
.case-card h3{font-size:17px;margin-bottom:10px}
.case-card p{font-size:14px;flex:1;margin-bottom:16px}
.case-meta{display:flex;justify-content:space-between;font-size:13px;color:var(--text-soft);border-top:1px solid var(--border);padding-top:14px}
.case-meta strong{color:var(--brand)}

/* Testimonials */
.testimonial{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);position:relative}
.testimonial::before{content:"\201C";position:absolute;top:6px;right:22px;font-size:64px;color:var(--brand-light);font-family:Georgia,serif;line-height:1}
.testimonial p{font-size:15px;color:var(--text);margin-bottom:18px;position:relative;z-index:1}
.testimonial .who{display:flex;align-items:center;gap:12px}
.testimonial .avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand-dark));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:16px}
.testimonial .who .name{font-weight:700;color:var(--accent);font-size:14px}
.testimonial .who .role{font-size:12px;color:var(--text-soft)}

/* News */
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.news-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);transition:.3s;display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--brand)}
.news-card .meta{display:flex;gap:14px;font-size:12.5px;color:var(--text-soft);margin-bottom:10px;flex-wrap:wrap}
.news-card .meta .cat{color:var(--brand);font-weight:700}
.news-card h3{font-size:17px;margin-bottom:8px}
.news-card p{font-size:14px;flex:1;margin-bottom:14px}
.news-card .read{font-weight:700;font-size:14px}

/* FAQ */
.faq-list{max-width:900px;margin:0 auto}
.faq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:12px;margin-bottom:12px;overflow:hidden;box-shadow:var(--shadow)}
.faq-q{width:100%;text-align:left;background:transparent;border:none;padding:18px 22px;font-size:16px;font-weight:700;color:var(--accent);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:16px;font-family:inherit}
.faq-q .plus{width:24px;height:24px;border-radius:50%;background:var(--brand-light);color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:16px;flex-shrink:0;transition:.3s}
.faq-item.open .faq-q .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 22px}
.faq-item.open .faq-a{max-height:600px;padding:0 22px 20px}
.faq-a p{font-size:14.5px;margin:0}

/* HowTo */
.howto-steps{display:grid;gap:16px;max-width:900px;margin:0 auto}
.step{display:grid;grid-template-columns:auto 1fr;gap:18px;background:var(--bg-card);border:1px solid var(--border);border-radius:12px;padding:22px;box-shadow:var(--shadow)}
.step .snum{width:44px;height:44px;border-radius:50%;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:900;font-size:18px;flex-shrink:0}
.step h4{margin-bottom:4px}
.step p{font-size:14.5px;margin:0}

/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.contact-info{display:grid;gap:16px}
.contact-item{display:flex;gap:16px;background:var(--bg-card);border:1px solid var(--border);border-radius:12px;padding:20px;box-shadow:var(--shadow)}
.contact-item .ci-icon{width:44px;height:44px;border-radius:12px;background:var(--brand-light);color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:20px;flex-shrink:0}
.contact-item h4{margin-bottom:2px}
.contact-item p{font-size:14px;margin:0}
.contact-form{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:14px}
.form-field{display:flex;flex-direction:column;gap:6px}
.form-field label{font-size:13px;font-weight:600;color:var(--accent)}
.form-field input,.form-field textarea,.form-field select{padding:11px 14px;border:1px solid var(--border);border-radius:10px;background:var(--bg-soft);color:var(--text);font-family:inherit;font-size:14px;outline:none;transition:.2s}
.form-field input:focus,.form-field textarea:focus,.form-field select:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(200,16,46,.1)}
.form-field textarea{resize:vertical;min-height:110px}

/* Footer */
.site-footer{background:var(--accent);color:#c9d0e0;padding:56px 0 0;margin-top:0}
html[data-theme="dark"] .site-footer{background:#0a0c10}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;padding-bottom:40px}
.footer-brand .logo{color:#fff;margin-bottom:14px}
.footer-brand .logo small{color:#9aa3b5}
.footer-brand p{color:#9aa3b5;font-size:14px;margin-bottom:16px}
.footer-social{display:flex;gap:10px}
.footer-social a{width:38px;height:38px;border-radius:50%;background:rgba(255,255,255,.08);display:flex;align-items:center;justify-content:center;color:#c9d0e0;font-size:13px;font-weight:700;transition:.2s}
.footer-social a:hover{background:var(--brand);color:#fff}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col ul li a{color:#9aa3b5;font-size:14px}
.footer-col ul li a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:22px 0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px;color:#8a93a6}
.footer-bottom .links{display:flex;gap:18px;flex-wrap:wrap}
.footer-bottom .links a{color:#8a93a6}
.footer-bottom .links a:hover{color:#fff}

/* Back to top */
.back-top{position:fixed;right:24px;bottom:28px;width:48px;height:48px;border-radius:50%;background:var(--brand);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-lg);opacity:0;visibility:hidden;transform:translateY(16px);transition:.3s;z-index:900;font-size:20px}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{background:var(--brand-dark)}

/* Reveal animation */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.reveal.visible{opacity:1;transform:none}

/* Skip link */
.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:10px 18px;z-index:2000;border-radius:0 0 8px 0}
.skip-link:focus{left:0}

/* Responsive */
@media (max-width:1024px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .about-grid{grid-template-columns:1fr;gap:32px}
  .grid-3,.product-grid{grid-template-columns:repeat(2,1fr)}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr}
}
@media (max-width:768px){
  .main-nav,.search-box{display:none}
  .menu-toggle{display:flex}
  .section{padding:52px 0}
  .grid-3,.grid-2,.product-grid,.news-grid,.grid-4{grid-template-columns:1fr}
  .hero-stats{grid-template-columns:1fr 1fr}
  .form-row{grid-template-columns:1fr}
  .about-facts{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr}
  .solution-item{grid-template-columns:1fr}
  .header-inner{height:60px}
  .mobile-nav{inset:60px 0 0 0}
}
@media (max-width:480px){
  .hero-stats{grid-template-columns:1fr}
  .about-facts{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}