:root{
  --bg:#F5F7FA;
  --bg-card:#FFFFFF;
  --bg-soft:#EEF2F7;
  --bg-dark:#0F172A;
  --bg-dark-soft:#1E293B;
  --text-main:#17202A;
  --text-sub:#3D4A5C;
  --text-muted:#5A6B80;
  --text-invert:#F8FAFC;
  --text-invert-sub:#CBD5E1;
  --brand:#1E3A8A;
  --brand-deep:#152C6B;
  --brand-light:#3B5BDB;
  --accent:#C2410C;
  --border:#D5DEE8;
  --border-dark:#334155;
  --shadow:0 2px 12px rgba(23,32,42,0.08);
  --shadow-lg:0 8px 30px rgba(23,32,42,0.12);
  --glass-bg:rgba(255,255,255,0.72);
  --glass-border:rgba(255,255,255,0.55);
  --glass-blur:blur(14px) saturate(160%);
  --radius-sm:10px;
  --radius-md:16px;
  --radius-lg:22px;
  --grad-brand:linear-gradient(135deg,#152C6B 0%,#1E3A8A 45%,#3B5BDB 100%);
  --grad-accent:linear-gradient(135deg,#C2410C 0%,#F97316 60%,#FFD166 100%);
  --grad-soft:linear-gradient(135deg,rgba(59,91,219,0.10),rgba(194,65,12,0.08));
}
html[data-theme="dark"]{
  --bg:#0B1220;
  --bg-card:#141F33;
  --bg-soft:#1A2740;
  --bg-dark:#060B14;
  --bg-dark-soft:#0F1A2E;
  --text-main:#E5E7EB;
  --text-sub:#CBD5E1;
  --text-muted:#94A3B8;
  --text-invert:#F8FAFC;
  --text-invert-sub:#CBD5E1;
  --brand:#7C9CF5;
  --brand-deep:#A5B8FA;
  --brand-light:#93B0F7;
  --accent:#FB923C;
  --border:#2A3A55;
  --border-dark:#334155;
  --shadow:0 2px 12px rgba(0,0,0,0.4);
  --shadow-lg:0 8px 30px rgba(0,0,0,0.5);
  --glass-bg:rgba(20,31,51,0.72);
  --glass-border:rgba(148,163,184,0.22);
  --grad-brand:linear-gradient(135deg,#0A1330 0%,#152C6B 50%,#1E3A8A 100%);
  --grad-accent:linear-gradient(135deg,#7C2D12 0%,#C2410C 60%,#FB923C 100%);
  --grad-soft:linear-gradient(135deg,rgba(124,156,245,0.12),rgba(251,146,60,0.10));
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC",sans-serif;
  background:var(--bg);
  color:var(--text-main);
  line-height:1.8;
  font-size:16px;
  transition:background-color .3s ease,color .3s ease;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
a{color:var(--brand);text-decoration:none;transition:color .2s ease}
a:hover{color:var(--accent)}
img,svg{max-width:100%;display:block}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--brand);color:#fff;padding:8px 16px;z-index:9999;border-radius:0 0 8px 0}
.skip-link:focus{left:8px;top:8px}
::selection{background:var(--brand);color:#fff}
::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-track{background:var(--bg-soft)}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:10px;border:2px solid var(--bg-soft)}
::-webkit-scrollbar-thumb:hover{background:var(--brand)}
/* Header */
.site-header{
  position:sticky;top:0;z-index:1000;
  background:var(--glass-bg);
  -webkit-backdrop-filter:var(--glass-blur);
  backdrop-filter:var(--glass-blur);
  border-bottom:1px solid var(--glass-border);
  box-shadow:var(--shadow);
  transition:background-color .3s ease,border-color .3s ease;
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;color:var(--text-main)}
.logo .logo-mark{width:38px;height:38px;flex:0 0 38px;transition:transform .4s cubic-bezier(.34,1.56,.64,1)}
.logo:hover .logo-mark{transform:rotate(-8deg) scale(1.08)}
.logo-text{display:flex;flex-direction:column;line-height:1.2}
.logo-text .cn{font-size:19px;color:var(--text-main);font-weight:800}
.logo-text .en{font-size:11px;color:var(--text-muted);letter-spacing:1px;font-weight:500}
.main-nav ul{display:flex;list-style:none;gap:4px;flex-wrap:wrap}
.main-nav a{
  display:block;padding:8px 14px;border-radius:var(--radius-sm);
  color:var(--text-sub);font-size:15px;font-weight:600;position:relative;
  transition:background-color .25s ease,color .25s ease,transform .25s ease;
}
.main-nav a::after{
  content:"";position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--brand);border-radius:2px;transform:scaleX(0);transform-origin:center;
  transition:transform .3s ease;
}
.main-nav a:hover,.main-nav a:focus{background:var(--bg-soft);color:var(--brand);outline:none;transform:translateY(-1px)}
.main-nav a:hover::after,.main-nav a:focus::after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:8px}
.icon-btn{
  width:40px;height:40px;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--border);border-radius:12px;background:var(--bg-card);
  cursor:pointer;color:var(--text-sub);
  transition:all .25s ease;
}
.icon-btn:hover{border-color:var(--brand);color:var(--brand);background:var(--bg-soft);transform:translateY(-2px);box-shadow:var(--shadow)}
.icon-btn:active{transform:translateY(0) scale(.96)}
.icon-btn svg{width:20px;height:20px;transition:transform .4s ease}
#themeToggle:hover svg{transform:rotate(28deg)}
.menu-toggle{display:none}
/* Search */
.search-bar{
  display:none;background:var(--glass-bg);
  -webkit-backdrop-filter:var(--glass-blur);
  backdrop-filter:var(--glass-blur);
  border-bottom:1px solid var(--border);
  padding:14px 0;
  animation:slideDown .3s ease;
}
@keyframes slideDown{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:translateY(0)}}
.search-bar.open{display:block}
.search-form{display:flex;gap:10px;max-width:640px;margin:0 auto}
.search-form input{
  flex:1;padding:11px 16px;border:1px solid var(--border);border-radius:var(--radius-sm);
  font-size:15px;background:var(--bg-card);color:var(--text-main);outline:none;
  transition:border-color .25s ease,box-shadow .25s ease;
}
.search-form input::placeholder{color:var(--text-muted)}
.search-form input:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(30,58,138,.15)}
.search-form button{
  padding:11px 24px;border:none;border-radius:var(--radius-sm);background:var(--brand);
  color:#fff;font-size:15px;font-weight:700;cursor:pointer;
  transition:background-color .25s ease,transform .2s ease,box-shadow .25s ease;
}
.search-form button:hover{background:var(--brand-deep);transform:translateY(-2px);box-shadow:var(--shadow)}
.search-form button:active{transform:translateY(0)}
/* Breadcrumb */
.breadcrumb{background:var(--bg-soft);border-bottom:1px solid var(--border);padding:12px 0;font-size:14px}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.breadcrumb li{color:var(--text-muted)}
.breadcrumb a{color:var(--brand);font-weight:600}
.breadcrumb .sep{color:var(--text-muted)}
/* Hero */
.hero{
  position:relative;background:var(--grad-brand);
  color:#fff;overflow:hidden;
  background-size:200% 200%;
  animation:gradShift 14s ease infinite;
}
@keyframes gradShift{0%{background-position:0% 50%}50%{background-position:100% 50%}100%{background-position:0% 50%}}
.hero::after{
  content:"";position:absolute;inset:0;
  background:radial-gradient(circle at 80% 20%,rgba(255,255,255,.16),transparent 55%),
             radial-gradient(circle at 10% 90%,rgba(255,209,102,.18),transparent 50%);
  pointer-events:none;
}
.hero::before{
  content:"";position:absolute;top:-40%;right:-10%;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.10),transparent 70%);
  animation:floatBlob 12s ease-in-out infinite;pointer-events:none;
}
@keyframes floatBlob{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(-30px,30px) scale(1.08)}}
.hero-inner{position:relative;z-index:2;padding:56px 0 48px;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.hero-badge{
  display:inline-block;background:rgba(255,255,255,.18);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  border:1px solid rgba(255,255,255,.35);
  color:#FFFFFF;font-size:13px;font-weight:700;padding:5px 14px;border-radius:999px;margin-bottom:16px;
  animation:fadeUp .7s ease both;
}
.hero h1{font-size:38px;line-height:1.3;color:#FFFFFF;font-weight:900;margin-bottom:16px;letter-spacing:.5px;animation:fadeUp .7s .08s ease both}
.hero h1 .hl{
  color:#FFD166;
  background:linear-gradient(90deg,#FFD166,#FFA94D);
  -webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;
}
.hero p.lead{font-size:17px;color:#EAF0FF;max-width:620px;margin-bottom:24px;line-height:1.9;animation:fadeUp .7s .16s ease both}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;animation:fadeUp .7s .24s ease both}
.btn{
  display:inline-block;padding:13px 28px;border-radius:14px;font-size:16px;font-weight:700;
  cursor:pointer;border:2px solid transparent;transition:all .28s cubic-bezier(.34,1.56,.64,1);text-align:center;
  position:relative;overflow:hidden;
}
.btn::after{
  content:"";position:absolute;top:0;left:-120%;width:60%;height:100%;
  background:linear-gradient(100deg,transparent,rgba(255,255,255,.45),transparent);
  transform:skewX(-20deg);transition:left .6s ease;
}
.btn:hover::after{left:140%}
.btn-primary{background:#FFD166;color:#152C6B;border-color:#FFD166;box-shadow:0 6px 20px rgba(255,209,102,.35)}
.btn-primary:hover{background:#FFC42E;color:#0F172A;transform:translateY(-3px);box-shadow:0 10px 28px rgba(255,209,102,.5)}
.btn-ghost{
  background:rgba(255,255,255,.10);color:#FFFFFF;border-color:rgba(255,255,255,.7);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
}
.btn-ghost:hover{background:rgba(255,255,255,.2);color:#FFFFFF;transform:translateY(-3px);border-color:#fff}
.hero-stats{display:flex;gap:28px;margin-top:28px;flex-wrap:wrap;animation:fadeUp .7s .32s ease both}
.hero-stats .stat-num{font-size:26px;font-weight:900;color:#FFD166;display:block;font-variant-numeric:tabular-nums}
.hero-stats .stat-label{font-size:13px;color:#D6E0FF}
.hero-visual{display:flex;justify-content:center;animation:fadeUp .8s .2s ease both}
.hero-visual svg{filter:drop-shadow(0 20px 40px rgba(0,0,0,.28));animation:floatY 6s ease-in-out infinite}
@keyframes floatY{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
@keyframes fadeUp{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:translateY(0)}}
/* Sections */
section{padding:56px 0}
.section-head{text-align:center;max-width:820px;margin:0 auto 36px}
.section-head h2{font-size:30px;color:var(--text-main);font-weight:900;margin-bottom:12px;letter-spacing:.3px}
.section-head h2::after{
  content:"";display:block;width:56px;height:4px;border-radius:4px;margin:14px auto 0;
  background:var(--grad-accent);
}
.section-head p{color:var(--text-sub);font-size:16px}
.section-head .eyebrow{
  display:inline-block;color:var(--brand);font-size:13px;font-weight:800;letter-spacing:2px;
  text-transform:uppercase;margin-bottom:10px;
  padding:4px 14px;border-radius:999px;background:var(--grad-soft);border:1px solid var(--border);
}
.bg-soft{background:var(--bg-soft)}
.bg-card{background:var(--bg-card)}
/* 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-md);
  padding:26px;box-shadow:var(--shadow);
  transition:transform .3s cubic-bezier(.34,1.56,.64,1),box-shadow .3s ease,border-color .3s ease;
  position:relative;overflow:hidden;
}
.card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:var(--grad-accent);transform:scaleX(0);transform-origin:left;
  transition:transform .4s ease;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:var(--brand)}
.card:hover::before{transform:scaleX(1)}
.card h3{font-size:19px;color:var(--text-main);font-weight:800;margin-bottom:10px}
.card h4{font-size:16px;color:var(--text-main);font-weight:700;margin:14px 0 8px}
.card p{color:var(--text-sub);font-size:15px}
.card .card-icon{width:46px;height:46px;margin-bottom:14px;transition:transform .4s cubic-bezier(.34,1.56,.64,1)}
.card:hover .card-icon{transform:scale(1.1) rotate(-5deg)}
/* Feature list */
.feature-list{list-style:none;display:grid;gap:10px;margin-top:12px}
.feature-list li{position:relative;padding-left:26px;color:var(--text-sub);font-size:15px;transition:color .25s ease,transform .25s ease}
.feature-list li::before{
  content:"";position:absolute;left:0;top:9px;width:14px;height:14px;border-radius:50%;
  background:var(--grad-accent);opacity:.9;transition:transform .3s ease;
}
.card:hover .feature-list li{transform:translateX(3px)}
.card:hover .feature-list li::before{transform:scale(1.15)}
/* Prose */
.prose{max-width:920px;margin:0 auto}
.prose h2{
  font-size:26px;color:var(--text-main);font-weight:900;margin:34px 0 14px;
  padding-left:14px;border-left:5px solid transparent;
  border-image:var(--grad-accent) 1;
}
.prose h3{font-size:20px;color:var(--text-main);font-weight:800;margin:24px 0 10px}
.prose h4{font-size:17px;color:var(--text-sub);font-weight:700;margin:18px 0 8px}
.prose p{color:var(--text-sub);margin-bottom:14px;font-size:16px}
.prose ul,.prose ol{margin:0 0 16px 22px;color:var(--text-sub)}
.prose li{margin-bottom:8px}
.prose strong{color:var(--text-main);font-weight:700}
/* Articles */
.article-card{display:flex;flex-direction:column}
.article-meta{font-size:13px;color:var(--text-muted);margin-bottom:10px;display:flex;gap:14px;flex-wrap:wrap}
.article-meta time{position:relative;padding-left:16px}
.article-meta time::before{
  content:"";position:absolute;left:0;top:50%;width:8px;height:8px;border-radius:50%;
  transform:translateY(-50%);background:var(--brand);
}
.article-card h3{font-size:18px;color:var(--text-main);font-weight:800;margin-bottom:10px;line-height:1.5;transition:color .25s ease}
.article-card:hover h3{color:var(--brand)}
.article-card p{color:var(--text-sub);font-size:14.5px;flex:1}
.read-more{display:inline-block;margin-top:14px;color:var(--brand);font-weight:700;font-size:14px;transition:color .25s ease,gap .25s ease}
.read-more:hover{color:var(--accent)}
/* FAQ */
.faq-list{max-width:900px;margin:0 auto}
.faq-item{
  background:var(--bg-card);border:1px solid var(--border);border-radius:14px;
  margin-bottom:12px;overflow:hidden;box-shadow:var(--shadow);
  transition:border-color .3s ease,box-shadow .3s ease;
}
.faq-item:hover{border-color:var(--brand);box-shadow:var(--shadow-lg)}
.faq-q{
  width:100%;text-align:left;background:transparent;border:none;cursor:pointer;
  padding:18px 22px;font-size:16.5px;font-weight:800;color:var(--text-main);
  display:flex;justify-content:space-between;align-items:center;gap:14px;font-family:inherit;
  transition:color .25s ease;
}
.faq-q:hover{color:var(--brand)}
.faq-q .chev{flex:0 0 22px;width:22px;height:22px;transition:transform .35s cubic-bezier(.34,1.56,.64,1);color:var(--brand)}
.faq-item.open .chev{transform:rotate(180deg)}
.faq-item.open{border-color:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s ease}
.faq-a-inner{padding:0 22px 20px;color:var(--text-sub);font-size:15.5px;border-top:1px solid var(--border);padding-top:16px;margin-top:0}
/* Steps */
.steps{counter-reset:step;display:grid;gap:18px;max-width:900px;margin:0 auto}
.step{
  position:relative;background:var(--bg-card);border:1px solid var(--border);border-radius:14px;
  padding:22px 24px 22px 76px;box-shadow:var(--shadow);
  transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease;
}
.step:hover{transform:translateX(6px);box-shadow:var(--shadow-lg);border-color:var(--brand)}
.step::before{
  counter-increment:step;content:counter(step);
  position:absolute;left:20px;top:22px;width:38px;height:38px;border-radius:50%;
  background:var(--brand);color:#fff;font-weight:900;font-size:18px;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 12px rgba(30,58,138,.35);
  transition:transform .35s cubic-bezier(.34,1.56,.64,1),background-color .3s ease;
}
.step:hover::before{transform:scale(1.12);background:var(--accent)}
.step h3{font-size:17px;color:var(--text-main);font-weight:800;margin-bottom:8px}
.step p{color:var(--text-sub);font-size:15px}
/* Cases */
.case-card{border-left:5px solid var(--brand);border-radius:var(--radius-md)}
.case-card:hover{border-left-color:var(--accent)}
.case-card .case-tag{
  display:inline-block;background:var(--grad-soft);color:var(--brand);font-size:12px;font-weight:800;
  padding:3px 12px;border-radius:999px;margin-bottom:10px;border:1px solid var(--border);
}
/* Testimonials */
.testimonial{
  background:var(--glass-bg);
  -webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);
  border:1px solid var(--glass-border);border-radius:var(--radius-md);padding:24px;box-shadow:var(--shadow);
  transition:transform .3s cubic-bezier(.34,1.56,.64,1),box-shadow .3s ease;
}
.testimonial:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.testimonial .quote{color:var(--text-sub);font-size:15px;font-style:normal;margin-bottom:16px;position:relative;padding-left:22px}
.testimonial .quote::before{
  content:"“";position:absolute;left:0;top:-8px;font-size:38px;line-height:1;
  color:var(--brand);opacity:.4;font-family:Georgia,serif;
}
.testimonial .who{display:flex;align-items:center;gap:12px}
.testimonial .who .avatar{width:44px;height:44px;border-radius:50%;flex:0 0 44px;transition:transform .35s ease}
.testimonial:hover .who .avatar{transform:scale(1.08) rotate(4deg)}
.testimonial .who .name{font-weight:800;color:var(--text-main);font-size:15px}
.testimonial .who .role{font-size:13px;color:var(--text-muted)}
/* Contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.contact-info{
  background:var(--glass-bg);
  -webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);
  border:1px solid var(--glass-border);border-radius:var(--radius-md);padding:28px;box-shadow:var(--shadow);
}
.contact-info dl{display:grid;gap:14px}
.contact-info dt{font-size:13px;color:var(--text-muted);font-weight:700;margin-bottom:2px}
.contact-info dd{font-size:15.5px;color:var(--text-main);font-weight:600}
.contact-form{
  background:var(--glass-bg);
  -webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);
  border:1px solid var(--glass-border);border-radius:var(--radius-md);padding:28px;box-shadow:var(--shadow);
}
.form-row{margin-bottom:16px}
.form-row label{display:block;font-size:14px;font-weight:700;color:var(--text-main);margin-bottom:6px}
.form-row input,.form-row textarea{
  width:100%;padding:11px 14px;border:1px solid var(--border);border-radius:var(--radius-sm);
  font-size:15px;background:var(--bg-soft);color:var(--text-main);outline:none;font-family:inherit;
  transition:border-color .25s ease,box-shadow .25s ease,background-color .25s ease;
}
.form-row input::placeholder,.form-row textarea::placeholder{color:var(--text-muted)}
.form-row input:focus,.form-row textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(30,58,138,.15);background:var(--bg-card)}
.form-row textarea{resize:vertical;min-height:120px}
/* Sitemap */
.sitemap-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.sitemap-col h3{font-size:16px;color:var(--text-main);font-weight:800;margin-bottom:12px}
.sitemap-col ul{list-style:none}
.sitemap-col li{margin-bottom:8px}
.sitemap-col a{color:var(--text-sub);font-size:14.5px;position:relative;transition:color .25s ease,padding-left .25s ease}
.sitemap-col a::before{
  content:"";position:absolute;left:0;top:50%;width:0;height:2px;background:var(--accent);
  transform:translateY(-50%);transition:width .25s ease;
}
.sitemap-col a:hover{color:var(--brand);padding-left:12px}
.sitemap-col a:hover::before{width:8px}
/* Footer */
.site-footer{background:var(--bg-dark);color:var(--text-invert-sub);padding:48px 0 24px;margin-top:20px;position:relative;overflow:hidden}
.site-footer::before{
  content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:var(--grad-accent);
}
html[data-theme="dark"] .site-footer{background:var(--bg-dark-soft)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px;margin-bottom:32px}
.footer-col h3{color:var(--text-invert);font-size:16px;font-weight:800;margin-bottom:14px}
.footer-col p{font-size:14px;color:var(--text-invert-sub);margin-bottom:10px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:8px}
.footer-col a{color:var(--text-invert-sub);font-size:14px;transition:color .25s ease,padding-left .25s ease}
.footer-col a:hover{color:#FFD166;padding-left:4px}
.footer-bottom{border-top:1px solid var(--border-dark);padding-top:20px;text-align:center;font-size:13.5px;color:var(--text-invert-sub)}
.footer-bottom p{margin-bottom:6px}
.footer-bottom a{color:#FFD166}
.footer-bottom a:hover{color:#FFC42E}
/* Back to top */
.back-top{
  position:fixed;right:22px;bottom:22px;width:48px;height:48px;border-radius:50%;
  background:var(--brand);color:#fff;border:none;cursor:pointer;display:none;
  align-items:center;justify-content:center;box-shadow:var(--shadow-lg);z-index:900;
  transition:background-color .25s ease,transform .3s cubic-bezier(.34,1.56,.64,1),opacity .3s ease;
}
.back-top.show{display:flex;animation:popIn .35s cubic-bezier(.34,1.56,.64,1)}
@keyframes popIn{from{opacity:0;transform:scale(.6)}to{opacity:1;transform:scale(1)}}
.back-top:hover{background:var(--brand-deep);transform:translateY(-4px) scale(1.06)}
.back-top:active{transform:translateY(0) scale(.95)}
.back-top svg{width:22px;height:22px}
/* Reveal */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s cubic-bezier(.22,1,.36,1),transform .7s cubic-bezier(.22,1,.36,1)}
.reveal.visible{opacity:1;transform:none}
/* Banner carousel */
.carousel{
  position:relative;overflow:hidden;border-radius:var(--radius-md);
  background:var(--glass-bg);
  -webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);
  border:1px solid var(--glass-border);box-shadow:var(--shadow);
}
.carousel-track{display:flex;transition:transform .55s cubic-bezier(.22,1,.36,1)}
.carousel-slide{min-width:100%;padding:34px 30px;position:relative}
.carousel-slide h3{font-size:21px;color:var(--text-main);font-weight:900;margin-bottom:10px}
.carousel-slide p{color:var(--text-sub);font-size:15px}
.carousel-dots{display:flex;justify-content:center;gap:8px;padding:14px}
.carousel-dots button{
  width:10px;height:10px;border-radius:50%;border:none;background:var(--border);cursor:pointer;padding:0;
  transition:background-color .3s ease,width .3s ease,transform .3s ease;
}
.carousel-dots button:hover{transform:scale(1.3)}
.carousel-dots button.active{background:var(--brand);width:26px;border-radius:5px}
/* Table */
.data-table{
  width:100%;border-collapse:collapse;background:var(--bg-card);border:1px solid var(--border);
  border-radius:12px;overflow:hidden;font-size:14.5px;box-shadow:var(--shadow);
  display:table;
}
.data-table th{background:var(--bg-soft);color:var(--text-main);font-weight:800;text-align:left;padding:13px 16px;border-bottom:1px solid var(--border)}
.data-table td{padding:13px 16px;color:var(--text-sub);border-bottom:1px solid var(--border);transition:background-color .25s ease}
.data-table tr:last-child td{border-bottom:none}
.data-table tbody tr:hover td{background:var(--bg-soft)}
/* Focus visible */
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--brand);outline-offset:2px;border-radius:6px;
}
/* Reduced motion */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}
/* Mobile */
@media(max-width:980px){
  .hero-inner{grid-template-columns:1fr;gap:30px}
  .hero h1{font-size:30px}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .sitemap-grid{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .hero-visual{order:-1;max-width:420px;margin:0 auto}
}
@media(max-width:720px){
  body{font-size:15.5px}
  .main-nav{
    display:none;position:absolute;top:68px;left:0;right:0;
    background:var(--glass-bg);
    -webkit-backdrop-filter:var(--glass-blur);backdrop-filter:var(--glass-blur);
    border-bottom:1px solid var(--border);box-shadow:var(--shadow-lg);padding:12px;
    animation:slideDown .3s ease;
  }
  .main-nav.open{display:block}
  .main-nav ul{flex-direction:column;gap:2px}
  .main-nav a{padding:12px 16px}
  .main-nav a::after{display:none}
  .menu-toggle{display:flex}
  .grid-3,.grid-4,.grid-2{grid-template-columns:1fr}
  .hero-inner{padding:40px 0 36px}
  .hero h1{font-size:26px}
  .hero p.lead{font-size:15.5px}
  .hero-stats{gap:18px}
  .hero-stats .stat-num{font-size:22px}
  .footer-grid{grid-template-columns:1fr}
  .sitemap-grid{grid-template-columns:1fr}
  .section-head h2{font-size:24px}
  .prose h2{font-size:22px}
  .prose h3{font-size:18px}
  .card{padding:22px}
  .step{padding:20px 18px 20px 68px}
  .step::before{left:16px;top:20px;width:34px;height:34px;font-size:16px}
  .btn{padding:12px 22px;font-size:15px}
  .hero-cta .btn{flex:1 1 auto}
  .data-table{font-size:13.5px}
  .data-table th,.data-table td{padding:10px 12px}
  .back-top{right:16px;bottom:16px;width:44px;height:44px}
  .carousel-slide{padding:26px 20px}
  .carousel-slide h3{font-size:18px}
  .contact-info,.contact-form{padding:22px}
}
@media(max-width:420px){
  .container{padding:0 16px}
  .hero h1{font-size:23px}
  .logo-text .cn{font-size:17px}
  .logo .logo-mark{width:34px;height:34px;flex:0 0 34px}
  .section-head h2{font-size:21px}
  .hero-stats{flex-direction:column;gap:12px}
  .header-actions{gap:6px}
  .icon-btn{width:36px;height:36px}
}
/* Print */
@media print{
  .site-header,.back-top,.search-bar,.main-nav,.hero-cta,.carousel-dots{display:none !important}
  body{background:#fff;color:#000}
  .card,.step,.faq-item{box-shadow:none;border:1px solid #ccc}
  .reveal{opacity:1;transform:none}
  a{color:#000;text-decoration:underline}
}