/* ============================================================
   NEXORA AI — Corporate Site
   Dark-tech enterprise theme derived from brand navy/blue
   ============================================================ */
:root{
  --bg:#050B14;
  --bg-alt:#081120;
  --bg-elev:#0C1A2E;
  --panel:rgba(255,255,255,.035);
  --panel-hover:rgba(255,255,255,.06);
  --line:rgba(139,178,220,.14);
  --line-strong:rgba(139,178,220,.28);
  --text:#E9F0F9;
  --muted:#93A6C0;
  --muted-2:#6B7F9C;
  --accent:#6FA8DC;
  --accent-2:#9CC6EE;
  --accent-deep:#2E5F94;
  --grad:linear-gradient(120deg,#9CC6EE 0%,#6FA8DC 45%,#3E7CB1 100%);
  --radius:16px;
  --max:1200px;
  --shadow:0 20px 60px -20px rgba(0,0,0,.6);
  --accent-ink:#04101F;
  --ease:cubic-bezier(.22,.61,.36,1);
  color-scheme:dark;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--text);
  line-height:1.75;font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
/* English: put the Latin faces first so glyphs are not drawn from the
   Chinese family's Latin set (PingFang / YaHei ship wide Latin glyphs). */
html.en body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,"Helvetica Neue",Helvetica,Arial,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  line-height:1.65;
  letter-spacing:0;
}
html.en h1,html.en h2,html.en h3{letter-spacing:-.01em}
::selection{background:rgba(111,168,220,.35);color:#fff}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.mono{font-family:"SF Mono",ui-monospace,"JetBrains Mono",Menlo,Consolas,monospace;letter-spacing:.14em;text-transform:uppercase}

.container{max-width:var(--max);margin:0 auto;padding:0 32px}

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar{width:10px}
::-webkit-scrollbar-track{background:var(--bg)}
::-webkit-scrollbar-thumb{background:#1B2C44;border-radius:8px;border:2px solid var(--bg)}
::-webkit-scrollbar-thumb:hover{background:#2A4468}

/* ============================================================
   NAV
   ============================================================ */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:background .35s var(--ease),border-color .35s var(--ease),backdrop-filter .35s;
  border-bottom:1px solid transparent;
}
.site-header.scrolled{
  background:rgba(5,11,20,.78);
  backdrop-filter:blur(18px) saturate(150%);
  -webkit-backdrop-filter:blur(18px) saturate(150%);
  border-bottom-color:var(--line);
}
.nav-inner{display:flex;align-items:center;gap:28px;height:72px}
.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand-mark{height:34px;width:auto}
.brand-word{font-size:19px;font-weight:700;letter-spacing:.18em;color:#fff}
.brand-ai{color:var(--accent);font-weight:500;margin-left:.35em}
.nav-links{display:flex;gap:4px;margin-left:auto}
.nav-links a{
  font-size:14px;color:var(--muted);padding:8px 12px;border-radius:8px;
  transition:color .25s,background .25s;white-space:nowrap;
}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(255,255,255,.05)}
.nav-actions{display:flex;align-items:center;gap:12px;margin-left:8px}

.lang-toggle{
  display:flex;align-items:center;border:1px solid var(--line-strong);border-radius:999px;
  background:transparent;cursor:pointer;padding:3px;gap:2px;transition:border-color .25s;
}
.lang-toggle:hover{border-color:var(--accent)}
.lang-toggle span{
  font-size:12px;font-weight:600;padding:4px 10px;border-radius:999px;
  color:var(--muted);transition:all .3s var(--ease);
}
html.en .lang-en-btn,html:not(.en) .lang-zh-btn{background:var(--accent);color:var(--accent-ink)}

/* theme toggle */
.theme-toggle{
  width:36px;height:36px;flex-shrink:0;display:flex;align-items:center;justify-content:center;
  border:1px solid var(--line-strong);border-radius:50%;background:transparent;cursor:pointer;
  color:var(--muted);transition:border-color .25s,color .25s,background .25s,transform .3s var(--ease);
}
.theme-toggle:hover{border-color:var(--accent);color:var(--accent);background:rgba(111,168,220,.08);transform:rotate(-15deg)}
.theme-toggle svg{width:18px;height:18px;position:absolute}
.theme-toggle{position:relative}
html:not(.light) .theme-toggle .ic-sun{display:none}
html.light .theme-toggle .ic-moon{display:none}

/* logo theme swap */
.logo-swap{display:inline-flex;align-items:center}
.logo-swap .on-light{display:none}
html.light .logo-swap .on-dark{display:none}
html.light .logo-swap .on-light{display:block}

.menu-btn{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.menu-btn span{width:22px;height:2px;background:var(--text);border-radius:2px;transition:transform .3s,opacity .3s}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-size:15px;font-weight:600;
  transition:transform .25s var(--ease),box-shadow .25s,background .25s,border-color .25s,color .25s;
  white-space:nowrap;
}
.btn-sm{padding:9px 20px;font-size:13.5px}
.btn-lg{padding:15px 32px;font-size:16px}
.btn-primary{
  background:var(--grad);color:var(--accent-ink);
  box-shadow:0 10px 30px -10px rgba(111,168,220,.55);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 40px -10px rgba(111,168,220,.7)}
.btn-ghost{border:1px solid var(--line-strong);color:var(--text);background:rgba(255,255,255,.02)}
.btn-ghost:hover{border-color:var(--accent);color:#fff;background:rgba(111,168,220,.08);transform:translateY(-2px)}

/* ============================================================
   HERO
   ============================================================ */
.hero{
  position:relative;min-height:100svh;display:flex;align-items:center;
  padding:130px 0 90px;overflow:hidden;
}
#heroCanvas{position:absolute;inset:0;width:100%;height:100%;opacity:.55}
.hero-glow{position:absolute;border-radius:50%;filter:blur(90px);pointer-events:none}
.hero-glow-1{width:640px;height:640px;background:radial-gradient(circle,rgba(62,124,177,.34),transparent 65%);top:-220px;right:-140px}
.hero-glow-2{width:520px;height:520px;background:radial-gradient(circle,rgba(46,95,148,.26),transparent 65%);bottom:-200px;left:-120px}
.hero-grid{
  position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(139,178,220,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(139,178,220,.05) 1px,transparent 1px);
  background-size:64px 64px;
  mask-image:radial-gradient(ellipse 75% 60% at 50% 40%,#000 25%,transparent 75%);
  -webkit-mask-image:radial-gradient(ellipse 75% 60% at 50% 40%,#000 25%,transparent 75%);
}
.hero-inner{position:relative;z-index:2;text-align:center;max-width:940px;margin:0 auto;padding:0 32px}
.hero-badge{
  display:inline-flex;align-items:center;gap:10px;
  border:1px solid var(--line-strong);border-radius:999px;padding:7px 18px 7px 10px;
  background:rgba(12,26,46,.6);backdrop-filter:blur(8px);
  font-size:13px;color:var(--accent-2);letter-spacing:.05em;margin-bottom:34px;
}
.badge-mark{height:22px;width:auto}
.hero-title{font-size:clamp(42px,7.2vw,84px);line-height:1.14;font-weight:700;letter-spacing:.01em}
.hero-line{display:block}
.grad-text{
  background:var(--grad);-webkit-background-clip:text;background-clip:text;
  -webkit-text-fill-color:transparent;color:transparent;
}
.hero-tag{margin:26px 0 22px;font-size:15px;color:var(--accent);font-weight:600}
.hero-desc{max-width:760px;margin:0 auto 40px;color:var(--muted);font-size:17px}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-spirit{
  margin-top:64px;display:flex;align-items:stretch;justify-content:center;gap:40px;flex-wrap:wrap;
  border-top:1px solid var(--line);padding-top:30px;
}
.spirit-item{display:flex;flex-direction:column;gap:6px;text-align:left}
.spirit-label{font-size:12px;letter-spacing:.16em;color:var(--muted-2);text-transform:uppercase}
.spirit-value{font-size:15.5px;color:var(--text);font-weight:500}
.spirit-divider{width:1px;background:linear-gradient(180deg,transparent,var(--line-strong),transparent)}

.scroll-hint{
  position:absolute;left:50%;bottom:26px;transform:translateX(-50%);
  width:24px;height:40px;border:1.5px solid var(--line-strong);border-radius:14px;z-index:2;
}
.scroll-hint span{
  position:absolute;left:50%;top:7px;width:3px;height:8px;margin-left:-1.5px;
  background:var(--accent);border-radius:3px;animation:scrollDot 2s infinite var(--ease);
}
@keyframes scrollDot{0%{transform:translateY(0);opacity:1}70%{transform:translateY(14px);opacity:0}100%{opacity:0}}

/* ============================================================
   SECTIONS
   ============================================================ */
.section{padding:110px 0;position:relative}
.section-alt{background:var(--bg-alt)}
.section-alt::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(ellipse 60% 40% at 80% 0%,rgba(46,95,148,.12),transparent 70%);
}
.section-head{max-width:820px;margin:0 auto 60px;text-align:center;position:relative;z-index:1}
.section-head.left{margin:0 0 34px;text-align:left}
.eyebrow{
  display:inline-block;font-size:12.5px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--accent);font-weight:600;margin-bottom:18px;
  padding:5px 14px;border:1px solid rgba(111,168,220,.25);border-radius:999px;
  background:rgba(111,168,220,.06);
}
h2{font-size:clamp(28px,3.6vw,42px);line-height:1.3;font-weight:700;letter-spacing:.01em}
.section-lead{margin-top:20px;color:var(--muted);font-size:17px}

/* ---------- Grid & Cards ---------- */
.grid{display:grid;gap:22px;position:relative;z-index:1}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

.card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 28px;position:relative;overflow:hidden;
  transition:transform .35s var(--ease),border-color .35s,background .35s,box-shadow .35s;
}
.card::after{
  content:"";position:absolute;inset:0;border-radius:var(--radius);pointer-events:none;
  background:radial-gradient(400px circle at var(--mx,50%) var(--my,0%),rgba(111,168,220,.10),transparent 60%);
  opacity:0;transition:opacity .4s;
}
.card:hover{
  transform:translateY(-5px);border-color:var(--line-strong);
  background:var(--panel-hover);box-shadow:var(--shadow);
}
.card:hover::after{opacity:1}
.card h3{font-size:19px;font-weight:600;margin-bottom:12px;letter-spacing:.01em}
.card p{color:var(--muted);font-size:14.5px;line-height:1.8}
.card-num{
  font-size:13px;color:var(--accent);opacity:.75;font-weight:600;
  display:inline-block;margin-bottom:16px;letter-spacing:.14em;
}

/* pain */
.pain-card{border-left:2px solid rgba(111,168,220,.4)}
/* value band */
.value-band{
  margin-top:44px;text-align:center;padding:34px 40px;border-radius:var(--radius);
  border:1px solid var(--line-strong);
  background:linear-gradient(120deg,rgba(46,95,148,.16),rgba(111,168,220,.07));
  position:relative;z-index:1;
}
.value-band p{font-size:18.5px;font-weight:600;color:var(--text);line-height:1.8}

/* ---------- About ---------- */
.about-inner{display:grid;grid-template-columns:.85fr 1.15fr;gap:70px;align-items:center}
.about-visual{position:relative;display:flex;align-items:center;justify-content:center;min-height:380px}
.about-visual img{width:min(280px,60%);position:relative;z-index:2;filter:drop-shadow(0 20px 50px rgba(46,95,148,.45))}
.about-ring{position:absolute;border-radius:50%;border:1px solid var(--line-strong);aspect-ratio:1;height:auto}
.about-ring-1{width:min(340px,80vw);animation:spin 26s linear infinite;border-style:dashed}
.about-ring-2{width:min(460px,82vw);border-color:rgba(139,178,220,.10);animation:spin 44s linear infinite reverse}
.about-ring::before{
  content:"";position:absolute;top:-5px;left:50%;width:9px;height:9px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 16px 3px rgba(111,168,220,.6);
}
@keyframes spin{to{transform:rotate(360deg)}}
.about-copy p{color:var(--muted);margin-bottom:20px;font-size:15.5px}
.about-copy p.reveal{margin-bottom:20px}
.about-quote{
  margin-top:30px;padding:24px 28px;border-left:2px solid var(--accent);
  background:linear-gradient(90deg,rgba(111,168,220,.09),transparent 85%);
  border-radius:0 12px 12px 0;font-size:16.5px;color:var(--text);font-weight:500;line-height:1.85;
}

/* ---------- Framework ---------- */
.framework{position:relative}
.framework-line{
  position:absolute;top:26px;left:8%;right:8%;height:1px;z-index:0;
  background:linear-gradient(90deg,transparent,var(--line-strong) 12%,var(--line-strong) 88%,transparent);
}
.step{position:relative;z-index:1;display:flex;flex-direction:column;align-items:center}
.step-dot{
  width:52px;height:52px;border-radius:50%;display:flex;align-items:center;justify-content:center;
  background:var(--bg);border:1px solid var(--line-strong);margin-bottom:26px;
  font-size:13px;color:var(--accent);font-weight:700;
  box-shadow:0 0 0 6px var(--bg),0 0 30px rgba(111,168,220,.25);
  transition:border-color .3s,box-shadow .3s,transform .3s;
}
.step:hover .step-dot{border-color:var(--accent);transform:scale(1.08);box-shadow:0 0 0 6px var(--bg),0 0 40px rgba(111,168,220,.5)}
.step-card{width:100%;height:calc(100% - 78px)}
.step-card h3{display:flex;flex-direction:column;gap:3px;margin-bottom:14px}
.en-key{font-size:20px;font-weight:700;letter-spacing:.06em;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.zh-key{font-size:13.5px;color:var(--muted-2);font-weight:500;letter-spacing:.08em}

/* ---------- Services ---------- */
.svc-head{display:flex;align-items:flex-start;justify-content:space-between;margin-bottom:14px}
.svc-head .card-num{margin-bottom:0}
.ic{width:26px;height:26px;color:var(--accent);flex-shrink:0;opacity:.9}
.svc-cta{
  display:flex;flex-direction:column;justify-content:center;align-items:flex-start;gap:14px;
  background:linear-gradient(135deg,rgba(46,95,148,.22),rgba(111,168,220,.07));
  border-color:var(--line-strong);
}
.svc-cta p{color:var(--muted)}
.svc-cta .btn{margin-top:4px}

/* ---------- Use cases ---------- */
.use-tag{
  display:inline-block;font-size:13px;font-weight:600;color:var(--accent-2);
  border:1px solid rgba(111,168,220,.3);border-radius:999px;padding:6px 15px;margin-bottom:16px;
  background:rgba(111,168,220,.07);
}

/* ---------- Industries ---------- */
.industry-cloud{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;max-width:900px;margin:0 auto}
.pill{
  padding:13px 26px;border-radius:999px;border:1px solid var(--line);
  background:var(--panel);font-size:15px;color:var(--text);
  transition:border-color .3s,background .3s,transform .3s var(--ease),box-shadow .3s;
}
.pill:hover{
  border-color:var(--accent);background:rgba(111,168,220,.1);
  transform:translateY(-3px);box-shadow:0 12px 30px -12px rgba(111,168,220,.4);
}

/* ---------- Strategic ---------- */
.strategic{
  background:linear-gradient(180deg,var(--bg) 0%,var(--bg-alt) 45%,var(--bg) 100%);
  padding:120px 0;
}
.strategic-inner{max-width:900px;text-align:center}
.strategic-text{
  font-size:clamp(19px,2.4vw,26px);line-height:1.9;font-weight:500;color:var(--text);
}
.strategic-text::first-letter{color:var(--accent)}

/* ---------- Contact ---------- */
.contact{position:relative;overflow:hidden;padding:130px 0}
.contact-glow{
  position:absolute;width:800px;height:800px;border-radius:50%;
  background:radial-gradient(circle,rgba(62,124,177,.22),transparent 62%);
  top:50%;left:50%;transform:translate(-50%,-50%);pointer-events:none;
}
.contact-inner{position:relative;z-index:1}
.contact-cta{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;margin-top:56px}

/* ---------- Footer ---------- */
.site-footer{border-top:1px solid var(--line);background:var(--bg-alt);padding:56px 0 40px}
.footer-inner{display:flex;flex-direction:column;align-items:center;gap:26px;text-align:center}
.footer-brand{display:flex;align-items:center;gap:16px}
.footer-brand .brand-mark{height:46px}
.footer-brand .brand-word{font-size:22px}
.footer-slogan{font-size:11.5px;color:var(--muted-2);margin-top:4px}
.footer-nav{display:flex;gap:6px;flex-wrap:wrap;justify-content:center}
.footer-nav a{font-size:13.5px;color:var(--muted);padding:7px 14px;border-radius:8px;transition:color .25s}
.footer-nav a:hover{color:var(--accent-2)}
.copyright{font-size:12.5px;color:var(--muted-2)}

/* ---------- Footer contact ---------- */
.footer-contact{
  display:flex;flex-wrap:wrap;justify-content:center;gap:20px 44px;
  width:100%;max-width:880px;margin-top:2px;padding-top:32px;
  border-top:1px solid var(--line);text-align:left;
}
.footer-contact-item{display:flex;align-items:flex-start;gap:13px;flex:1 1 340px;min-width:0}
.fc-icon{
  flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;
  width:36px;height:36px;border-radius:10px;border:1px solid var(--line-strong);
  background:var(--panel);color:var(--accent);transition:color .25s,border-color .25s;
}
.fc-icon svg{width:17px;height:17px}
.footer-contact-item:hover .fc-icon{color:var(--accent-2);border-color:rgba(111,168,220,.45)}
.fc-body{display:flex;flex-direction:column;gap:4px;min-width:0}
.fc-label{
  font-size:10.5px;font-weight:600;letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted-2);line-height:1;
}
.fc-value{font-size:13.5px;line-height:1.6;color:var(--text);margin:0;font-style:normal}
.fc-link{color:var(--accent-2);text-decoration:none;transition:color .25s;word-break:break-all}
.fc-link:hover{color:var(--accent);text-decoration:underline;text-underline-offset:3px}
html.light .fc-icon{background:#fff;box-shadow:0 3px 14px -8px rgba(23,53,90,.18)}
html.light .fc-icon{color:var(--accent)}
html.light .fc-link{color:var(--accent)}
html.light .fc-link:hover{color:var(--accent-deep)}
html.light .fc-label{color:var(--muted)}

/* ============================================================
   REVEAL ANIMATIONS
   ============================================================ */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .8s var(--ease),transform .8s var(--ease)}
.reveal.in-view{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .about-ring{animation:none}
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width:1080px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .about-inner{grid-template-columns:1fr;gap:50px}
  .about-visual{min-height:320px;order:-1}
  .nav-links{display:none}
  .nav-inner{gap:12px}
  .nav-actions{margin-left:auto;gap:8px}
  .menu-btn{display:flex}
  .framework-line{display:none}
  .step-dot{margin-bottom:18px}
}
@media (max-width:720px){
  .container{padding:0 22px}
  .brand-word{font-size:16px;letter-spacing:.12em}
  .brand-mark{height:30px}
  .hero-tag{font-size:10.5px;letter-spacing:.06em}
  .hero-badge{font-size:12px;padding:6px 14px 6px 8px}
  .hero-cta .btn{width:100%}
  .section{padding:80px 0}
  .grid-4,.grid-3{grid-template-columns:1fr}
  .hero-title{font-size:clamp(34px,9vw,52px)}
  .hero-desc{font-size:15.5px}
  .hero-spirit{gap:22px;flex-direction:column;align-items:center;text-align:center}
  .spirit-item{align-items:center;text-align:center}
  .spirit-divider{display:none}
  .nav-cta{display:none}
  .contact-cta .btn{width:100%}
  .value-band{padding:26px 22px}
  .value-band p{font-size:16px}
  .footer-contact{gap:22px;padding-top:26px;max-width:100%}
  .footer-contact-item{flex:1 1 100%}
  .fc-value{font-size:13px}
}

/* mobile nav drawer */
@media (max-width:1080px){
  .nav-links.open{
    display:flex;position:fixed;top:72px;left:0;right:0;flex-direction:column;
    background:rgba(5,11,20,.97);backdrop-filter:blur(20px);
    border-bottom:1px solid var(--line);padding:18px 22px 24px;gap:2px;
  }
  .nav-links.open a{padding:13px 12px;font-size:15px}
  .menu-btn.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .menu-btn.open span:nth-child(2){opacity:0}
  .menu-btn.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
}

/* ============================================================
   LIGHT THEME
   ============================================================ */
html.light{
  color-scheme:light;
  --bg:#F5F8FC;
  --bg-alt:#EAF0F8;
  --bg-elev:#FFFFFF;
  --panel:rgba(255,255,255,.82);
  --panel-hover:#FFFFFF;
  --line:rgba(28,60,100,.10);
  --line-strong:rgba(28,60,100,.20);
  --text:#0D1F35;
  --muted:#51698A;
  --muted-2:#7A8FA9;
  --accent:#2E6FA8;
  --accent-2:#3E7CB1;
  --accent-deep:#1E4C7A;
  --grad:linear-gradient(120deg,#4E8AC8 0%,#3E7CB1 45%,#2E5F94 100%);
  --shadow:0 22px 50px -22px rgba(23,53,90,.28);
  --accent-ink:#FFFFFF;
}
body{transition:background-color .45s var(--ease),color .45s var(--ease)}

/* header & brand */
html.light .site-header.scrolled{background:rgba(245,248,252,.85);border-bottom-color:var(--line)}
html.light .brand-word{color:var(--text)}
html.light .brand-ai{color:var(--accent)}
html.light .nav-links a:hover,html.light .nav-links a.active{background:rgba(28,60,100,.06);color:var(--text)}
html.light .theme-toggle:hover{background:rgba(46,111,168,.10)}
html.light .btn-ghost{background:#FFFFFF}
html.light .btn-ghost:hover{color:var(--accent-deep);background:rgba(46,111,168,.08)}
html.light .btn-primary{box-shadow:0 10px 26px -12px rgba(30,76,122,.55)}
html.light .btn-primary:hover{box-shadow:0 16px 34px -12px rgba(30,76,122,.6)}

/* scrollbar */
html.light::-webkit-scrollbar-track,
html.light ::-webkit-scrollbar-track{background:var(--bg)}
html.light ::-webkit-scrollbar-thumb{background:#C3D2E4;border-color:var(--bg)}
html.light ::-webkit-scrollbar-thumb:hover{background:#A6BAD2}

/* hero */
html.light #heroCanvas{opacity:.4}
html.light .hero-glow-1{background:radial-gradient(circle,rgba(94,152,208,.24),transparent 65%)}
html.light .hero-glow-2{background:radial-gradient(circle,rgba(120,170,215,.20),transparent 65%)}
html.light .hero-grid{
  background-image:linear-gradient(rgba(28,60,100,.055) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(28,60,100,.055) 1px,transparent 1px);
}
html.light .hero-badge{
  background:rgba(255,255,255,.75);border-color:var(--line-strong);color:var(--accent-deep);
  box-shadow:0 6px 20px -12px rgba(23,53,90,.3);
}
html.light .hero-tag{color:var(--accent)}
html.light .spirit-label{color:var(--muted-2)}

/* sections */
html.light .section-alt::before{background:radial-gradient(ellipse 60% 40% at 80% 0%,rgba(94,152,208,.14),transparent 70%)}
html.light .eyebrow{
  color:var(--accent-deep);border-color:rgba(46,111,168,.24);background:rgba(46,111,168,.07);
}
html.light .card{
  box-shadow:0 3px 14px -8px rgba(23,53,90,.16);
}
html.light .card:hover{box-shadow:var(--shadow);background:#fff}
html.light .card::after{background:radial-gradient(400px circle at var(--mx,50%) var(--my,0%),rgba(94,152,208,.16),transparent 60%)}
html.light .pain-card{border-left-color:rgba(46,111,168,.45)}
html.light .value-band{
  background:linear-gradient(120deg,rgba(94,152,208,.16),rgba(255,255,255,.7));
  border-color:var(--line-strong);
}
html.light .about-visual img{filter:drop-shadow(0 18px 40px rgba(46,111,168,.22))}
html.light .about-quote{background:linear-gradient(90deg,rgba(46,111,168,.10),transparent 85%)}
html.light .step-dot{
  border-color:var(--line-strong);
  box-shadow:0 0 0 6px var(--bg),0 0 24px rgba(46,111,168,.18);
}
html.light .step:hover .step-dot{box-shadow:0 0 0 6px var(--bg),0 0 30px rgba(46,111,168,.35)}
html.light .zh-key{color:var(--muted-2)}
html.light .svc-cta{background:linear-gradient(135deg,rgba(94,152,208,.22),rgba(255,255,255,.7))}
html.light .use-tag{
  color:var(--accent-deep);border-color:rgba(46,111,168,.28);background:rgba(46,111,168,.07);
}
html.light .pill{background:#fff;box-shadow:0 3px 14px -8px rgba(23,53,90,.18)}
html.light .pill:hover{background:#fff;border-color:var(--accent);box-shadow:0 14px 28px -14px rgba(46,111,168,.45)}
html.light .contact-glow{background:radial-gradient(circle,rgba(94,152,208,.20),transparent 62%)}
html.light .scroll-hint{border-color:var(--line-strong)}
html.light .copyright,html.light .footer-slogan{color:var(--muted-2)}
html.light .footer-nav a:hover{color:var(--accent)}
html.light ::selection{background:rgba(46,111,168,.22);color:#0D1F35}