:root{
  --background:hsl(222 40% 7%);
  --foreground:hsl(220 14% 90%);
  --card:hsl(222 47% 11%);
  --primary:hsl(217 91% 50%);
  --primary-foreground:#fff;
  --secondary:hsl(217 33% 17%);
  --muted:hsl(217 33% 15%);
  --muted-foreground:hsl(218 11% 65%);
  --accent:hsl(213 94% 67%);
  --border:hsl(215 28% 17%);
  --gradient-primary:linear-gradient(135deg,#1e3a8a 0%,#2563eb 100%);
  --gradient-bright:linear-gradient(135deg,#60a5fa 0%,#38bdf8 100%);
  --radius:.5rem;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,"Microsoft YaHei","Segoe UI",sans-serif;background:var(--background);color:var(--foreground);line-height:1.7}
a{text-decoration:none;color:inherit}
.container{max-width:72rem;margin:0 auto;padding:0 1.5rem}
/* nav */
nav{position:sticky;top:0;z-index:50;border-bottom:1px solid var(--border);background:rgba(10,14,26,.8);backdrop-filter:blur(12px)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:4rem}
.logo{display:flex;align-items:center;gap:.5rem;font-size:1.125rem;font-weight:700}
.logo-badge{display:flex;height:2rem;width:2rem;align-items:center;justify-content:center;border-radius:calc(var(--radius) - 4px);background:var(--gradient-primary);color:#fff}
.logo .accent{background:var(--gradient-bright);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.nav-links{display:flex;gap:.25rem;align-items:center}
.nav-links a{padding:.5rem 1rem;font-size:.875rem;font-weight:500;border-radius:var(--radius);color:var(--foreground)}
.nav-links a:hover,.nav-links a.active{background:var(--secondary);color:var(--accent)}
.nav-cta{background:var(--gradient-primary);color:#fff !important;padding:.5rem 1.25rem;border-radius:var(--radius);font-size:.875rem;font-weight:500}
/* dropdown */
.has-dropdown{position:relative}
.has-dropdown>.dropdown-toggle{display:flex;align-items:center;gap:.25rem;cursor:pointer}
.has-dropdown>.dropdown-toggle::after{content:'▾';font-size:.7em;opacity:.6}
.dropdown-menu{display:none;position:absolute;top:100%;left:50%;transform:translateX(-50%);min-width:14rem;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:.5rem;box-shadow:0 10px 30px rgba(0,0,0,.4);z-index:100}
.has-dropdown:hover .dropdown-menu{display:block;animation:fadeInUp .2s ease}
.dropdown-menu a{display:block;padding:.6rem .8rem;border-radius:.375rem !important;white-space:nowrap}
.dropdown-menu a:hover{background:var(--secondary)}
.dropdown-menu .dd-title{font-weight:600;color:var(--foreground)}
.dropdown-menu .dd-desc{font-size:.75rem;color:var(--muted-foreground);margin-top:.15rem}
/* animations */
@keyframes fadeInUp{from{opacity:0;transform:translate(-50%,8px)}to{opacity:1;transform:translate(-50%,0)}}
@keyframes fadeIn{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-12px)}}
@keyframes pulse{0%,100%{opacity:.4}50%{opacity:.8}}
@keyframes gradientShift{0%{background-position:0% 50%}50%{background-position:100% 50%}100%{background-position:0% 50%}}
.reveal{opacity:0;animation:fadeIn .8s ease forwards}
.reveal:nth-child(2){animation-delay:.1s}
.reveal:nth-child(3){animation-delay:.2s}
.orb{position:absolute;border-radius:50%;filter:blur(60px);opacity:.35;pointer-events:none;animation:pulse 6s ease-in-out infinite}
/* page hero */
.page-hero{padding:4rem 0 2rem;text-align:center}
.page-hero .en{color:var(--accent);font-size:.8rem;letter-spacing:.15em;text-transform:uppercase;font-weight:600}
.page-hero h1{font-size:2.25rem;margin:.5rem 0;font-weight:700}
.page-hero p{color:var(--muted-foreground);max-width:36rem;margin:0 auto}
/* sections */
section{padding:3rem 0}
.sec-head{text-align:center;margin-bottom:2.5rem}
.sec-head .en{color:var(--accent);font-size:.8rem;letter-spacing:.15em;text-transform:uppercase;font-weight:600}
.sec-head h2{font-size:1.875rem;margin:.5rem 0;font-weight:700}
.sec-head p{color:var(--muted-foreground);max-width:36rem;margin:0 auto}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:1.5rem}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:1.25rem}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.75rem;transition:.2s}
.card:hover{border-color:var(--primary);transform:translateY(-3px)}
.card h3{font-size:1.125rem;margin-bottom:.25rem}
.card .tagline{color:var(--accent);font-size:.875rem;margin-bottom:.75rem}
.card p{color:var(--muted-foreground);font-size:.875rem}
.card ul{margin:.75rem 0 0 1.1rem;color:var(--muted-foreground);font-size:.825rem}
.card ul li{margin-bottom:.25rem}
.metrics{display:flex;gap:1.25rem;margin-top:1rem;padding-top:1rem;border-top:1px solid var(--border)}
.metrics div b{color:var(--accent);font-size:1.125rem;display:block}
.metrics div small{color:var(--muted-foreground);font-size:.75rem}
/* solutions */
.solution{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:1.5rem}
.solution .ind{color:var(--accent);font-size:.75rem;margin-bottom:.25rem}
.solution h4{font-size:1rem;margin-bottom:.5rem}
.solution p{color:var(--muted-foreground);font-size:.825rem}
.solution ul{margin-top:.75rem;color:var(--muted-foreground);font-size:.825rem;margin-left:1.1rem}
.solution ul li{margin-bottom:.25rem}
/* news */
.tabs{display:flex;gap:.5rem;justify-content:center;margin-bottom:2rem;flex-wrap:wrap}
.tabs button{background:transparent;border:1px solid var(--border);color:var(--muted-foreground);padding:.5rem 1.25rem;border-radius:var(--radius);cursor:pointer;font-size:.875rem}
.tabs button.active{background:var(--gradient-primary);color:#fff;border-color:transparent}
.news-item{display:flex;gap:1.25rem;padding:1.5rem 0;border-bottom:1px solid var(--border)}
.news-item img{width:9rem;height:6rem;object-fit:cover;border-radius:var(--radius);flex-shrink:0}
.news-item .cat{color:var(--accent);font-size:.75rem}
.news-item h4{font-size:1.05rem;margin:.25rem 0}
.news-item p{color:var(--muted-foreground);font-size:.875rem}
.news-item a.readmore{color:var(--accent);font-size:.825rem;margin-top:.5rem;display:inline-block}
/* news detail */
.article{max-width:48rem;margin:0 auto;padding:2rem 0}
.article .cat{color:var(--accent);font-size:.8rem}
.article h1{font-size:1.75rem;margin:.5rem 0 1rem;line-height:1.4}
.article .meta{color:var(--muted-foreground);font-size:.825rem;margin-bottom:1.5rem;padding-bottom:1rem;border-bottom:1px solid var(--border)}
.article .cover{width:100%;border-radius:var(--radius);margin-bottom:1.5rem}
.article .body{font-size:1rem;line-height:2;color:var(--foreground)}
.article .body p{margin-bottom:1rem}
.article .body h2,.article .body h3{margin:1.5rem 0 .75rem}
.article .body img{max-width:100%;border-radius:8px;margin:1rem 0}
.article .body ul,.article .body ol{margin-left:1.5rem;margin-bottom:1rem}
/* contact */
.contact-wrap{display:grid;grid-template-columns:1fr 1.5fr;gap:2rem;align-items:start}
.contact-info-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:2rem}
.contact-info-card h3{margin-bottom:1.5rem}
.contact-info-item{margin-bottom:1.25rem}
.contact-info-item .label{color:var(--muted-foreground);font-size:.75rem}
.contact-info-item .value{font-size:1rem;margin-top:.15rem}
.contact-form{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:2rem}
.contact-form h3{margin-bottom:1.25rem}
.form-row{margin-bottom:1rem}
.form-row label{display:block;font-size:.825rem;color:var(--muted-foreground);margin-bottom:.35rem}
.form-row input,.form-row textarea{width:100%;padding:.75rem 1rem;border-radius:var(--radius);border:1px solid var(--border);background:var(--background);color:var(--foreground);font-size:.9rem;font-family:inherit}
.form-row button{background:var(--gradient-primary);color:#fff;border:none;padding:.8rem 2rem;border-radius:var(--radius);font-size:1rem;cursor:pointer;font-weight:500;width:100%}
/* cases stats */
.stats-row{display:flex;gap:3rem;justify-content:center;margin:2rem 0;flex-wrap:wrap}
.stat b{font-size:2rem;background:var(--gradient-bright);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;display:block}
.stat small{color:var(--muted-foreground);font-size:.875rem}
/* footer */
footer{border-top:1px solid var(--border);padding:2.5rem 0;margin-top:3rem}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:2rem}
.footer-grid h4{font-size:.95rem;margin-bottom:.75rem}
.footer-grid a,.footer-grid p{display:block;color:var(--muted-foreground);font-size:.825rem;margin-bottom:.35rem}
.footer-bottom{text-align:center;color:var(--muted-foreground);font-size:.75rem;margin-top:2rem;padding-top:1.5rem;border-top:1px solid var(--border)}
/* CTA */
.cta-band{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:3rem;text-align:center;margin:2rem 0}
.cta-band h2{font-size:1.5rem;margin-bottom:.5rem}
.cta-band p{color:var(--muted-foreground);margin-bottom:1.5rem}
.btn-primary{background:var(--gradient-primary);color:#fff;padding:.8rem 2rem;border-radius:var(--radius);font-weight:500;display:inline-block}
.btn-secondary{background:transparent;border:1px solid var(--border);color:var(--foreground);padding:.8rem 2rem;border-radius:var(--radius);font-weight:500;display:inline-block}
/* hamburger */
.menu-toggle{display:none;background:none;border:none;color:var(--foreground);font-size:1.5rem;cursor:pointer;padding:.5rem}

/* ===== 平板 ===== */
@media(max-width:1024px){
  .container{padding:0 1.25rem}
  .grid3{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:2.25rem}
  .page-hero h1{font-size:2rem}
}

/* ===== 手机 ===== */
@media(max-width:768px){
  .menu-toggle{display:block}
  .nav-links{
    display:none;position:absolute;top:4rem;left:0;right:0;
    flex-direction:column;background:var(--card);border-bottom:1px solid var(--border);
    padding:1rem;gap:.5rem;align-items:stretch;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:.75rem 1rem}
  .nav-cta{text-align:center}
  .has-dropdown{position:static}
  .dropdown-menu{
    position:static;transform:none;left:0;display:none;
    box-shadow:none;border:none;background:var(--muted);margin:.25rem 0;
  }
  .has-dropdown.open .dropdown-menu{display:block}

  .grid3{grid-template-columns:1fr}
  .grid2{grid-template-columns:1fr}
  .contact-wrap{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:1.5rem}
  .page-hero{padding:2.5rem 0 1.5rem}
  .page-hero h1{font-size:1.75rem}
  .hero{padding:3rem 0 2.5rem;min-height:auto}
  .hero h1{font-size:1.75rem}
  .hero p{font-size:.95rem}
  section{padding:2rem 0}
  .sec-head h2{font-size:1.5rem}
  .news-item{flex-direction:column;gap:.75rem}
  .news-item img{width:100%;height:12rem}
  .stats-row{gap:1.5rem}
  .stat b{font-size:1.5rem}
  .cta-band{padding:1.5rem}
  .article{padding:1.5rem 0}
  .article h1{font-size:1.4rem}
  .hero-btns{flex-direction:column;align-items:center}
}

@media(max-width:480px){
  .hero h1{font-size:1.5rem}
  .card{padding:1.25rem}
  .container{padding:0 1rem}
}