:root{
  --bg:#03040a;
  --ink:#f7f8ff;
  --muted:#9aa6ce;
  --soft:#687399;
  --blue:#4f7dff;
  --cyan:#58d7ff;
  --orange:#ff8a3d;
  --panel:rgba(255,255,255,.055);
  --line:rgba(255,255,255,.14);
}
*{box-sizing:border-box}
html,body,#root{width:100%;height:100%;margin:0;overflow:hidden;background:var(--bg);color:var(--ink)}
body{
  font-family:"PingFang SC","Microsoft YaHei","HarmonyOS Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
button{font:inherit}
#three-stage{
  position:fixed;
  inset:0;
  width:100%;
  height:100%;
  z-index:0;
  background:
    radial-gradient(900px 680px at 18% 12%,rgba(51,99,255,.34),transparent 62%),
    radial-gradient(760px 620px at 92% 70%,rgba(255,120,48,.23),transparent 64%),
    linear-gradient(120deg,#02030a,#071127 46%,#05050b);
}
.app-shell{
  --slide-pad-x:clamp(36px,5.7vw,92px);
  --slide-pad-y:clamp(34px,5.2vw,88px);
  --slide-gap:clamp(28px,5vw,86px);
  --title-size:clamp(58px,7.7vw,138px);
  --video-title-size:clamp(52px,6.15vw,112px);
  --lead-size:clamp(17px,1.2vw,23px);
  --lead-lines:30em;
  --copy-width:720px;
  --media-min:70vh;
  position:relative;
  z-index:1;
  width:100%;
  height:100%;
  overflow:hidden;
}
.app-shell.short{
  --slide-pad-x:clamp(28px,4.5vw,72px);
  --slide-pad-y:clamp(26px,4.2vw,60px);
  --slide-gap:clamp(22px,3.8vw,56px);
  --title-size:clamp(44px,6.4vw,100px);
  --video-title-size:clamp(42px,5.2vw,80px);
  --lead-size:clamp(15px,1.05vw,20px);
  --media-min:64vh;
}
.app-shell.tablet{
  --slide-pad-x:clamp(28px,5vw,52px);
  --slide-pad-y:clamp(28px,5vw,64px);
  --slide-gap:clamp(20px,3vw,44px);
  --title-size:clamp(46px,7.8vw,86px);
  --video-title-size:clamp(42px,6.4vw,72px);
  --lead-size:clamp(15px,1.7vw,20px);
  --media-min:58vh;
}
.app-shell.phone{
  --slide-pad-x:18px;
  --slide-pad-y:66px;
  --slide-gap:18px;
  --title-size:clamp(40px,13vw,68px);
  --video-title-size:clamp(36px,11vw,58px);
  --lead-size:15px;
  --media-min:42vh;
}
.deck{
  height:100%;
  display:flex;
  transform:translate3d(calc(var(--index,0) * -100vw),0,0);
  transition:transform .86s cubic-bezier(.18,.88,.18,1);
}
.slide{
  flex:0 0 100vw;
  width:100vw;
  height:100dvh;
  padding:var(--slide-pad-y) var(--slide-pad-x);
  display:grid;
  grid-template-columns:minmax(320px,.88fr) minmax(460px,1.12fr);
  align-items:center;
  gap:var(--slide-gap);
  position:relative;
  overflow:hidden;
}
.slide.video-hero{
  grid-template-columns:minmax(260px,.58fr) minmax(420px,1fr);
  gap:clamp(26px,5vw,90px);
}
.slide.cta-slide{
  grid-template-columns:minmax(300px,.72fr) minmax(640px,1.28fr);
}
.slide::before{
  content:"";
  position:absolute;
  inset:8vh 52vw auto 5vw;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--line),transparent);
}
.cover-slide{
  display:grid;
  grid-template-columns:1fr;
  place-items:center;
  background:#000;
  color:#fff;
}
.cover-slide::before{display:none}
.cover-center{
  display:grid;
  gap:18px;
  place-items:center;
  transform:translateY(-1vh);
}
.cover-title{
  margin:0;
  max-width:92vw;
  color:#f7f7f2;
  font-size:clamp(74px,10vw,154px);
  line-height:1;
  font-weight:860;
  letter-spacing:.08em;
  text-align:center;
  white-space:nowrap;
}
.cover-byline{
  margin:0;
  color:rgba(255,255,255,.62);
  font-size:clamp(14px,1.3vw,22px);
  letter-spacing:.16em;
}
.cover-school{
  position:absolute;
  left:50%;
  bottom:clamp(38px,6vh,70px);
  transform:translateX(-50%);
  margin:0;
  width:min(88vw,900px);
  color:rgba(255,255,255,.66);
  text-align:center;
  font-size:clamp(15px,1.25vw,22px);
  letter-spacing:.08em;
}
.copy{
  position:relative;
  z-index:2;
  max-width:var(--copy-width);
  transform:translateY(0);
  animation:copy-in .9s cubic-bezier(.2,.8,.2,1) both;
}
.video-hero .copy{max-width:520px}
.cta-slide .copy{max-width:540px}
@keyframes copy-in{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.eyebrow{
  font-size:12px;
  line-height:1;
  letter-spacing:.18em;
  text-transform:none;
  color:var(--cyan);
  font-weight:700;
  margin-bottom:clamp(18px,2vw,28px);
}
.title{
  margin:0;
  max-width:8.8em;
  font-weight:900;
  letter-spacing:0;
  line-height:1.01;
  font-size:var(--title-size);
  background:none;
  color:#edf1ff;
  text-shadow:0 0 58px rgba(65,108,255,.18);
  text-wrap:balance;
  word-break:keep-all;
  overflow-wrap:normal;
}
.title-line{display:block;white-space:nowrap}
.video-hero .title{font-size:var(--video-title-size);max-width:6.4em}
.lead{
  margin:clamp(18px,2.4vw,30px) 0 0;
  max-width:var(--lead-lines);
  font-size:var(--lead-size);
  line-height:1.68;
  color:#c4cbe2;
  text-wrap:pretty;
}
.lead b{color:#fff;font-weight:700}
.tags{display:flex;flex-wrap:wrap;gap:12px;margin-top:clamp(20px,2.6vw,32px)}
.tag{
  border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.045);
  color:#dbe3ff;
  border-radius:999px;
  padding:9px 14px;
  font-size:14px;
  font-weight:600;
}
.tag.hot{border-color:rgba(255,138,61,.42);color:#ffd4bb;background:rgba(255,138,61,.09)}
.media-zone{
  position:relative;
  z-index:2;
  min-height:var(--media-min);
  display:flex;
  align-items:center;
  justify-content:center;
}
.video-hero .media-zone{justify-content:flex-start}
.device{
  --w:min(36vw,440px);
  width:var(--w);
  aspect-ratio:682/1478;
  position:relative;
  border-radius:42px;
  padding:12px;
  background:linear-gradient(155deg,#5d668a,#12182f 42%,#050711);
  box-shadow:
    0 56px 110px rgba(0,0,0,.62),
    0 0 0 1px rgba(255,255,255,.16) inset,
    0 0 92px rgba(79,125,255,.27);
  animation:float 7s ease-in-out infinite alternate;
}
.device::after{
  content:"";
  position:absolute;
  top:20px;
  left:50%;
  transform:translateX(-50%);
  width:96px;
  height:24px;
  border-radius:999px;
  background:#000;
  z-index:3;
}
.device.warm{box-shadow:0 56px 110px rgba(0,0,0,.62),0 0 0 1px rgba(255,255,255,.16) inset,0 0 102px rgba(255,138,61,.3)}
.device.large{--w:min(38vw,470px)}
.device.medium{--w:min(28vw,340px)}
.device.small{--w:min(20vw,230px);border-radius:30px;padding:8px}
.screen{
  width:100%;
  height:100%;
  overflow:hidden;
  border-radius:30px;
  background:#fff;
  position:relative;
  box-shadow:0 0 0 1px rgba(255,255,255,.06) inset;
}
.device.small .screen{border-radius:22px}
.screen img,.screen video{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.video-frame{
  width:min(54vw,740px);
  aspect-ratio:16/9;
  border-radius:30px;
  overflow:hidden;
  position:relative;
  background:#090b14;
  border:1px solid rgba(255,255,255,.13);
  box-shadow:0 48px 120px rgba(0,0,0,.54),0 0 110px rgba(79,125,255,.22);
}
.video-hero .video-frame{
  height:min(80vh,780px);
  width:auto;
  aspect-ratio:var(--video-aspect);
  border-radius:40px;
}
.video-frame video{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.side-stack{
  position:absolute;
  right:1vw;
  bottom:6vh;
  display:flex;
  gap:18px;
  align-items:flex-end;
}
.side-stack .device:nth-child(1){transform:rotate(-7deg) translateY(18px);opacity:.86}
.side-stack .device:nth-child(2){transform:rotate(7deg);opacity:.9}
.cta-zone{
  min-height:78vh;
  display:grid;
  grid-template-columns:minmax(260px,.9fr) minmax(220px,.62fr);
  gap:clamp(20px,3vw,42px);
  align-items:center;
  justify-content:center;
}
.poster-card{
  width:min(30vw,390px);
  aspect-ratio:1086/1448;
  overflow:hidden;
  border-radius:28px;
  background:#fff;
  border:1px solid rgba(255,255,255,.18);
  box-shadow:0 44px 100px rgba(0,0,0,.56),0 0 94px rgba(255,138,61,.2);
  transform:rotate(-2deg);
}
.poster-card img{
  width:100%;
  height:100%;
  display:block;
  object-fit:cover;
}
.qr-grid{
  width:min(19vw,270px);
  display:grid;
  gap:16px;
  min-width:0;
}
.qr-card{
  display:grid;
  gap:10px;
  padding:14px;
  border-radius:24px;
  background:#f8f8f4;
  color:#11131a;
  border:1px solid rgba(255,255,255,.35);
  box-shadow:0 28px 70px rgba(0,0,0,.42);
  min-width:0;
  overflow:hidden;
}
.qr-card.primary{transform:translateX(-22px)}
.qr-card img{
  width:100%;
  max-height:min(27vh,230px);
  display:block;
  object-fit:contain;
  min-width:0;
}
.qr-card span{
  font-size:15px;
  font-weight:800;
  text-align:center;
  letter-spacing:.1em;
}
.slide-badge{
  position:absolute;
  left:clamp(24px,4vw,60px);
  top:clamp(22px,4vh,48px);
  z-index:10;
  color:var(--soft);
  letter-spacing:.24em;
  font-weight:700;
  font-size:12px;
}
.chrome{
  position:fixed;
  inset:auto clamp(24px,4vw,58px) 28px clamp(24px,4vw,58px);
  z-index:10;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  pointer-events:none;
}
.dots{display:flex;gap:12px;align-items:center;pointer-events:auto}
.dot{
  width:8px;
  height:8px;
  border-radius:999px;
  border:0;
  padding:0;
  background:rgba(255,255,255,.22);
  cursor:pointer;
}
.dot.active{width:34px;background:linear-gradient(90deg,var(--blue),var(--orange));box-shadow:0 0 16px rgba(79,125,255,.45)}
.controls{display:flex;gap:10px;pointer-events:auto}
.control{
  border:1px solid rgba(255,255,255,.16);
  color:#dbe3ff;
  background:rgba(255,255,255,.055);
  border-radius:999px;
  padding:10px 14px;
  cursor:pointer;
  backdrop-filter:blur(16px);
}
@keyframes float{from{transform:translateY(10px) rotate(-1deg)}to{transform:translateY(-12px) rotate(1deg)}}
@media (max-height:790px) and (min-width:981px){
  .video-hero .video-frame{height:min(72vh,640px)}
  .tags{gap:8px}
  .tag{padding:7px 11px;font-size:13px}
  .eyebrow{margin-bottom:16px}
  .lead{line-height:1.52}
  .poster-card{width:min(26vw,320px)}
  .qr-grid{width:min(17vw,230px)}
}
@media (max-width:980px){
  .slide,.slide.video-hero,.slide.cta-slide{
    grid-template-columns:1fr;
    padding:76px 24px 96px;
    gap:24px;
    align-content:center;
  }
  .title{font-size:var(--title-size)}
  .video-hero .title{font-size:var(--video-title-size)}
  .copy,.video-hero .copy,.cta-slide .copy{max-width:760px}
  .lead{max-width:36em;line-height:1.54}
  .media-zone{min-height:44vh}
  .video-hero .media-zone{justify-content:center}
  .device,.device.large{--w:min(74vw,360px)}
  .video-frame,.video-hero .video-frame{width:auto;height:min(52vh,560px);border-radius:28px}
  .side-stack{display:none}
  .cta-zone{grid-template-columns:1fr;min-height:45vh}
  .poster-card{display:none}
  .qr-grid{width:min(86vw,520px);grid-template-columns:1fr 1fr}
  .qr-card.primary{transform:none}
  .qr-card img{max-height:22vh}
}
@media (max-width:740px){
  .slide,.slide.video-hero,.slide.cta-slide{padding:66px 18px 84px;gap:16px}
  .eyebrow{font-size:10px;letter-spacing:.28em;margin-bottom:12px}
  .lead{margin-top:12px;line-height:1.45;max-width:24em}
  .tags{display:none}
  .media-zone{min-height:40vh}
  .device,.device.large{--w:min(72vw,290px);border-radius:32px;padding:9px}
  .device::after{width:72px;height:18px;top:17px}
  .screen{border-radius:24px}
  .video-frame,.video-hero .video-frame{width:min(calc(100vw - 36px),420px);height:auto;max-height:46vh;border-radius:20px}
  .cta-zone{min-height:38vh}
  .qr-grid{width:calc(100vw - 36px);gap:10px}
  .qr-card{border-radius:18px;padding:10px}
  .qr-card img{max-height:22vh}
  .qr-card span{font-size:12px;letter-spacing:.08em}
  .controls{display:none}
  .chrome{justify-content:center;bottom:22px}
  .dots{gap:9px}
  .slide-badge{font-size:10px;letter-spacing:.16em;top:22px}
  .cover-title{font-size:clamp(46px,15.5vw,62px);letter-spacing:.02em}
  .cover-byline{font-size:12px;letter-spacing:.1em}
  .cover-school{font-size:13px;letter-spacing:.02em;bottom:52px}
}
@media (prefers-reduced-motion:reduce){
  .deck,.device,.copy{animation:none;transition:none}
}