/* ===== Base ===== */
:root{
  --ink:#0b0b0d;
  --paper:#f4f4f4;
  --line:rgba(255,255,255,.18);
  --line-dark:rgba(0,0,0,.14);
  --accent:#3ea6ff;
  --accent2:#00e0b8;
  --nav-h:60px;
  --ease:cubic-bezier(.22,.61,.36,1);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--ink);
  color:#fff;
  font-family:"PingFang SC","Helvetica Neue",Helvetica,"Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
canvas.bg-canvas{position:absolute;inset:0;width:100%;height:100%;display:block;z-index:0}

/* ===== Scroll snap panels (Tesla-like) ===== */
main{scroll-snap-type:y proximity}
.panel{
  position:relative;
  min-height:100svh;
  scroll-snap-align:start;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:space-between;
  padding:calc(var(--nav-h) + 6vh) 24px 6vh;
  overflow:hidden;
  isolation:isolate;
}
.panel.light{background:var(--paper);color:#111}
.panel > *{position:relative;z-index:2}

.panel-content{max-width:1180px;width:100%;text-align:center}
.panel-content.top{margin-top:2vh}
.panel-content.wide{text-align:left;margin-top:1vh}

.eyebrow{
  font-size:12px;letter-spacing:.34em;text-transform:uppercase;
  opacity:.6;margin-bottom:18px;font-weight:500;
}
.display{
  font-size:clamp(34px,5.4vw,76px);
  font-weight:600;letter-spacing:-.02em;line-height:1.08;
}
.title{font-size:clamp(28px,3.6vw,50px);font-weight:600;letter-spacing:-.01em;line-height:1.15;margin-bottom:22px}
.lede{margin-top:18px;font-size:clamp(15px,1.35vw,19px);line-height:1.7;opacity:.78;max-width:760px;margin-left:auto;margin-right:auto}
.panel-content.wide .lede{margin-left:0}
.para{font-size:17px;line-height:1.9;opacity:.75;max-width:900px}

/* ===== Buttons ===== */
.panel-actions{display:flex;gap:16px;flex-wrap:wrap;justify-content:center;padding-bottom:26px}
.btn{
  min-width:236px;padding:13px 26px;border-radius:4px;text-align:center;
  font-size:14px;letter-spacing:.16em;font-weight:600;
  transition:transform .35s var(--ease),background .3s,color .3s,box-shadow .35s;
  will-change:transform;
}
.btn-solid{background:#fff;color:#111}
.btn-ghost{background:rgba(255,255,255,.12);color:#fff;backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.25)}
.btn-solid.dark{background:#111;color:#fff}
.btn-ghost.dark{background:rgba(0,0,0,.07);color:#111;border-color:rgba(0,0,0,.2)}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 34px rgba(0,0,0,.35)}
.btn-solid:hover{background:#e9e9e9}

/* ===== Nav ===== */
.nav{
  position:fixed;top:0;left:0;right:0;height:var(--nav-h);z-index:60;
  display:flex;align-items:center;justify-content:space-between;
  padding:0 26px;transition:background .4s var(--ease),backdrop-filter .4s,box-shadow .4s,color .3s;
}
.nav.scrolled{background:rgba(12,12,14,.72);backdrop-filter:saturate(160%) blur(14px);box-shadow:0 1px 0 rgba(255,255,255,.08)}
.nav.on-light{color:#111}
.nav.on-light.scrolled{background:rgba(244,244,244,.8);box-shadow:0 1px 0 rgba(0,0,0,.08)}
.brand{display:flex;align-items:center;gap:10px}
.brand-logo{position:relative;width:26px;height:32px;flex:none;display:block}
.brand-logo img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:contain;
  transition:opacity .35s var(--ease),transform .5s var(--ease);
}
.logo-on-light{opacity:0}
.nav.on-light .logo-on-dark{opacity:0}
.nav.on-light .logo-on-light{opacity:1}
.brand:hover .brand-logo img{transform:translateY(-2px) rotate(-8deg)}
.brand-mark{font-size:21px;font-weight:700;letter-spacing:.16em;white-space:nowrap}
.brand-sub{font-size:10px;letter-spacing:.3em;opacity:.55}
.nav-links{display:flex;gap:6px}
.nav-links a{
  padding:8px 14px;border-radius:4px;font-size:13.5px;font-weight:500;
  white-space:nowrap;
  transition:background .25s,opacity .25s;opacity:.9;
}
.nav-links a:hover{background:rgba(128,128,128,.18);opacity:1}
.nav-right{display:flex;align-items:center;gap:10px}
.nav-cta{padding:7px 16px;border-radius:4px;font-size:13px;white-space:nowrap;background:rgba(128,128,128,.2);backdrop-filter:blur(8px)}
.nav-cta:hover{background:rgba(128,128,128,.34)}
.menu-btn{display:none;background:none;border:0;cursor:pointer;width:30px;height:24px;flex-direction:column;justify-content:center;gap:6px}
.menu-btn span{display:block;height:1.6px;background:currentColor;border-radius:2px;transition:transform .3s var(--ease),opacity .3s}
.menu-btn.open span:nth-child(1){transform:translateY(3.8px) rotate(45deg)}
.menu-btn.open span:nth-child(2){transform:translateY(-3.8px) rotate(-45deg)}

.drawer{
  position:fixed;inset:var(--nav-h) 0 auto 0;z-index:55;
  background:rgba(12,12,14,.96);backdrop-filter:blur(18px);
  display:flex;flex-direction:column;padding:10px 26px 26px;
  transform:translateY(-120%);transition:transform .5s var(--ease);
}
.drawer.open{transform:translateY(0)}
.drawer a{padding:16px 0;border-bottom:1px solid rgba(255,255,255,.09);font-size:16px;color:#fff}

/* ===== Scroll progress + cursor ===== */
.scroll-progress{position:fixed;top:0;left:0;right:0;height:2px;z-index:70;background:transparent}
.scroll-progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--accent),var(--accent2))}
.cursor-glow{
  position:fixed;top:0;left:0;width:420px;height:420px;margin:-210px 0 0 -210px;
  border-radius:50%;pointer-events:none;z-index:1;opacity:0;
  background:radial-gradient(circle,rgba(62,166,255,.16),transparent 62%);
  transition:opacity .5s;mix-blend-mode:screen;
}

/* ===== Hero ===== */
.hero{background:radial-gradient(120% 90% at 50% 0%,#16233a 0%,#0b0b0d 62%)}
.hero-vignette{position:absolute;inset:0;z-index:1;background:radial-gradient(ellipse at 50% 55%,transparent 40%,rgba(0,0,0,.6) 100%)}
.scroll-hint{position:absolute;bottom:22px;left:50%;transform:translateX(-50%);z-index:3;width:22px;height:36px;border:1.5px solid rgba(255,255,255,.45);border-radius:12px}
.scroll-hint span{position:absolute;left:50%;top:7px;width:3px;height:7px;margin-left:-1.5px;border-radius:2px;background:#fff;animation:wheel 1.8s infinite}
@keyframes wheel{0%{opacity:0;transform:translateY(0)}30%{opacity:1}100%{opacity:0;transform:translateY(13px)}}

/* ===== Feature cards ===== */
.feature-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;max-width:1180px;width:100%;margin:0 auto}
.feature-card{
  padding:24px 22px;border-radius:10px;text-align:left;
  background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.1);
  backdrop-filter:blur(10px);
  transition:transform .45s var(--ease),background .35s,border-color .35s,box-shadow .45s;
}
.light .feature-card{background:rgba(0,0,0,.045);border-color:rgba(0,0,0,.09)}
.feature-card:hover{transform:translateY(-6px);background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.24);box-shadow:0 20px 50px rgba(0,0,0,.35)}
.light .feature-card:hover{background:#fff;border-color:rgba(0,0,0,.14);box-shadow:0 18px 44px rgba(0,0,0,.12)}
.fc-icon{font-size:20px;color:var(--accent);margin-bottom:12px}
.feature-card h3{font-size:17px;font-weight:600;margin-bottom:8px}
.feature-card p{font-size:13.5px;line-height:1.72;opacity:.72}
.feature-row.compact .feature-card{padding:18px 20px}
.grid-overlay{
  position:absolute;inset:0;z-index:1;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:72px 72px;
  mask-image:radial-gradient(ellipse at 50% 40%,#000 20%,transparent 78%);
  -webkit-mask-image:radial-gradient(ellipse at 50% 40%,#000 20%,transparent 78%);
}
.traffic{background:linear-gradient(180deg,#0b0b0d 0%,#0d1420 55%,#0b0b0d 100%)}

/* ===== Video wall ===== */
.video-panel{background:#f4f4f4}
.video-panel::after{
  content:"";position:absolute;inset:0;z-index:1;pointer-events:none;
  background:radial-gradient(ellipse at 50% 42%,rgba(244,244,244,.94) 0%,rgba(244,244,244,.72) 45%,rgba(244,244,244,.1) 78%);
}
.videowall{
  position:absolute;inset:0;z-index:0;display:grid;
  grid-template-columns:repeat(8,1fr);grid-auto-rows:1fr;gap:3px;padding:3px;
  opacity:.42;
  mask-image:linear-gradient(180deg,#000 0%,rgba(0,0,0,.25) 46%,#000 100%);
  -webkit-mask-image:linear-gradient(180deg,#000 0%,rgba(0,0,0,.25) 46%,#000 100%);
}
.videowall i{
  display:block;background:#dcdcdc;border-radius:2px;position:relative;overflow:hidden;
  animation:tileFade 6s ease-in-out infinite;
}
.videowall i::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(115deg,transparent 30%,rgba(255,255,255,.85) 50%,transparent 70%);
  transform:translateX(-120%);animation:sweep 4.5s linear infinite;
}
.videowall i.on{background:#111}
.videowall i.hot{background:linear-gradient(135deg,#1b6fb8,#0b0b0d)}
@keyframes tileFade{0%,100%{opacity:.55}50%{opacity:1}}
@keyframes sweep{0%{transform:translateX(-120%)}60%,100%{transform:translateX(220%)}}

.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;max-width:1180px;width:100%;margin:0 auto}
.stat{text-align:center;padding:14px 8px}
.stat b{display:block;font-size:clamp(28px,3.4vw,46px);font-weight:600;letter-spacing:-.02em;font-variant-numeric:tabular-nums}
.stat span{display:block;margin-top:6px;font-size:13px;opacity:.62;letter-spacing:.06em}
.stat-strip.big{margin:38px 0 26px}

/* ===== Open API ===== */
.openapi{background:radial-gradient(110% 80% at 20% 10%,#101b2b 0%,#0b0b0d 60%)}
.api-showcase{display:grid;grid-template-columns:1.15fr .85fr;gap:26px;max-width:1180px;width:100%;margin:0 auto;align-items:start}
.code-card{
  border-radius:12px;overflow:hidden;text-align:left;
  background:rgba(10,12,16,.82);border:1px solid rgba(255,255,255,.13);
  box-shadow:0 30px 80px rgba(0,0,0,.55);backdrop-filter:blur(8px);
}
.code-head{display:flex;align-items:center;gap:7px;padding:11px 14px;background:rgba(255,255,255,.06);border-bottom:1px solid rgba(255,255,255,.09)}
.code-head i{width:10px;height:10px;border-radius:50%;background:#4a4a52}
.code-head span{margin-left:10px;font-size:12px;opacity:.6;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}
.code-card pre{padding:18px;overflow:auto;font-size:12.6px;line-height:1.75}
.code-card code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;color:#d6dae2;white-space:pre}
.c-k{color:#7ee787}.c-s{color:#a5d6ff}.c-p{color:#79c0ff}.c-n{color:#ffa657}
.api-list{list-style:none;text-align:left}
.api-list li{padding:15px 4px;border-bottom:1px solid rgba(255,255,255,.11);display:flex;flex-direction:column;gap:4px;transition:padding-left .3s var(--ease),border-color .3s}
.api-list li:hover{padding-left:12px;border-color:var(--accent)}
.api-list b{font-size:15.5px;font-weight:600}
.api-list span{font-size:13px;opacity:.63}

/* ===== About / pills ===== */
.about{justify-content:center}
.pill-row{display:flex;gap:10px;flex-wrap:wrap}
.pill-row span{padding:8px 16px;border-radius:999px;border:1px solid rgba(0,0,0,.16);font-size:13px}

/* ===== Business ===== */
.business{background:#0b0b0d;justify-content:center}
.biz-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:34px}
.biz{
  padding:28px 26px;border-radius:12px;position:relative;overflow:hidden;
  background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,.02));
  border:1px solid rgba(255,255,255,.1);
  transition:transform .5s var(--ease),border-color .4s;
}
.biz::before{
  content:"";position:absolute;inset:-1px;border-radius:12px;padding:1px;opacity:0;
  background:linear-gradient(120deg,var(--accent),var(--accent2));
  -webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;transition:opacity .4s;
}
.biz:hover{transform:translateY(-8px)}
.biz:hover::before{opacity:1}
.biz h3{font-size:19px;margin-bottom:12px;font-weight:600}
.biz p{font-size:14px;line-height:1.8;opacity:.7}

/* ===== Cases ===== */
.cases{justify-content:center}
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:32px}
.case{background:#fff;border-radius:12px;padding:30px 26px;box-shadow:0 2px 0 rgba(0,0,0,.05);transition:transform .5s var(--ease),box-shadow .5s}
.case:hover{transform:translateY(-8px);box-shadow:0 26px 60px rgba(0,0,0,.14)}
.case-no{font-size:13px;letter-spacing:.2em;opacity:.4}
.case h3{font-size:20px;margin:12px 0 12px;font-weight:600}
.case p{font-size:14px;line-height:1.85;opacity:.7}
.case-more{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.case-more span{padding:9px 15px;background:rgba(0,0,0,.055);border-radius:6px;font-size:13px;transition:background .3s,transform .3s}
.case-more span:hover{background:rgba(0,0,0,.1);transform:translateY(-2px)}

/* ===== Future ===== */
.future{background:#0b0b0d;justify-content:center}
.future-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;margin-top:34px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.1);border-radius:12px;overflow:hidden}
.fut{background:#0b0b0d;padding:30px 26px;transition:background .4s}
.fut:hover{background:#14161b}
.fut h3{font-size:18px;margin-bottom:10px;font-weight:600}
.fut p{font-size:13.6px;line-height:1.8;opacity:.68}

/* ===== Contact / footer ===== */
.contact{background:radial-gradient(120% 90% at 50% 100%,#16233a 0%,#0b0b0d 60%);justify-content:center;gap:36px}
.contact-grid{
  display:grid;grid-template-columns:1.2fr .8fr;gap:34px;align-items:center;
  max-width:900px;width:100%;
}
.contact-list{list-style:none;text-align:left}
.contact-list li{
  display:flex;align-items:baseline;gap:18px;padding:15px 6px;
  border-bottom:1px solid rgba(255,255,255,.12);
  transition:padding-left .3s var(--ease),border-color .3s;
}
.contact-list li:hover{padding-left:10px;border-color:var(--accent)}
.cl-label{font-size:12px;letter-spacing:.22em;opacity:.45;min-width:52px}
.contact-list b{font-size:18px;font-weight:600;letter-spacing:.01em}
.contact-list a{transition:color .25s}
.contact-list a:hover{color:var(--accent)}

.qr-card{display:flex;flex-direction:column;align-items:center;gap:12px}
.qr-frame{
  width:190px;height:190px;padding:12px;border-radius:14px;background:#fff;
  box-shadow:0 20px 50px rgba(0,0,0,.45);
  display:flex;align-items:center;justify-content:center;
  transition:transform .45s var(--ease),box-shadow .45s;
}
.qr-frame:hover{transform:translateY(-6px) scale(1.03);box-shadow:0 28px 66px rgba(0,0,0,.6)}
.qr-frame img{width:100%;height:100%;object-fit:contain;display:block}
.qr-fallback{display:none;font-size:11.5px;line-height:1.8;color:#666;text-align:center;padding:8px}
.qr-fallback code{font-family:ui-monospace,Menlo,monospace;font-size:11px;color:#111}
.qr-frame.missing{background:rgba(255,255,255,.07);border:1px dashed rgba(255,255,255,.3);box-shadow:none}
.qr-frame.missing .qr-fallback{display:block;color:rgba(255,255,255,.6)}
.qr-frame.missing .qr-fallback code{color:var(--accent)}
.qr-card figcaption{font-size:12.5px;letter-spacing:.14em;opacity:.55}
.footer{width:100%;max-width:1180px;margin-top:auto;padding-top:36px;border-top:1px solid rgba(255,255,255,.12)}
.footer-brand{display:flex;align-items:center;gap:12px;margin-bottom:28px}
.footer-brand img{width:26px;height:32px;object-fit:contain}
.footer-brand span{font-size:14px;letter-spacing:.06em;opacity:.8}
.footer-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;text-align:left}
.footer-cols div{display:flex;flex-direction:column;gap:9px}
.footer-cols b{font-size:13px;letter-spacing:.18em;opacity:.5;text-transform:uppercase;margin-bottom:4px}
.footer-cols a{font-size:13.5px;opacity:.72;transition:opacity .25s}
.footer-cols a:hover{opacity:1}
.copy{margin-top:26px;font-size:12.5px;opacity:.42;text-align:center;line-height:1.9}
.copy .sep{margin:0 10px;opacity:.5}
.copy .icp{transition:opacity .25s,color .25s}
.copy .icp:hover{color:var(--accent);opacity:1}
@media (max-width:760px){.copy .sep{display:none}.copy .icp{display:block;margin-top:6px}}

/* ===== Reveal animation ===== */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .9s var(--ease),transform .9s var(--ease)}
.reveal.in{opacity:1;transform:none}
.d1{transition-delay:.1s}.d2{transition-delay:.22s}.d3{transition-delay:.34s}
.biz.reveal,.case.reveal,.fut.reveal{transition-delay:calc(var(--i,0) * .07s)}

/* ===== Responsive ===== */
@media (max-width:1180px){
  .brand-sub{display:none}
  .nav-links a{padding:8px 10px;font-size:13px}
  .nav{padding:0 18px}
}
@media (max-width:1024px){
  .feature-row,.stat-strip{grid-template-columns:repeat(2,1fr)}
  .biz-grid,.case-grid,.future-grid{grid-template-columns:repeat(2,1fr)}
  .api-showcase{grid-template-columns:1fr}
}
@media (max-width:760px){
  .nav-links,.nav-cta{display:none}
  .menu-btn{display:flex}
  .panel{padding:calc(var(--nav-h) + 5vh) 18px 5vh;gap:30px;justify-content:flex-start}
  .feature-row,.biz-grid,.case-grid,.future-grid,.footer-cols{grid-template-columns:1fr}
  .stat-strip{grid-template-columns:repeat(2,1fr);gap:4px}
  .stat b{font-size:26px}
  .contact-grid{grid-template-columns:1fr;gap:26px;justify-items:center}
  .contact-list{width:100%}
  .btn{min-width:100%}
  .panel-actions{width:100%}
  .cursor-glow{display:none}
  .videowall{grid-template-columns:repeat(4,1fr)}
}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .videowall i,.videowall i::after,.scroll-hint span{animation:none}
  html{scroll-behavior:auto}
}