:root{
  --red:#d71920;
  --red-dark:#a80f15;
  --black:#0e1013;
  --ink:#191b20;
  --muted:#686d76;
  --line:#e6e8eb;
  --soft:#f4f5f7;
  --white:#fff;
  --radius:28px;
  --max:1200px;
  --shadow:0 24px 70px rgba(14,16,19,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.65}
a{color:inherit}
img{max-width:100%;display:block}
.container{width:min(calc(100% - 40px),var(--max));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.92);backdrop-filter:blur(18px);border-bottom:1px solid rgba(14,16,19,.08)}
.nav{height:78px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-weight:900;letter-spacing:-.03em}
.brand-mark{width:42px;height:42px;border-radius:13px;background:linear-gradient(145deg,var(--red),#7b090d);position:relative;box-shadow:0 10px 26px rgba(215,25,32,.26)}
.brand-mark:before{content:"";position:absolute;inset:10px;border:4px solid #fff;border-bottom-width:7px}
.brand-sub{display:block;color:var(--muted);font-size:.72rem;letter-spacing:.02em;font-weight:700}
.nav-links{display:flex;align-items:center;gap:24px}
.nav-links a{text-decoration:none;font-size:.94rem;font-weight:750}
.nav-cta{padding:11px 17px;border-radius:999px;background:var(--red);color:#fff!important}
.nav-toggle{display:none;border:0;background:none;font-size:1.55rem}
.hero{padding:92px 0 54px;background:
radial-gradient(circle at 82% 16%,rgba(215,25,32,.16),transparent 31%),
linear-gradient(180deg,#fff 0%,#f5f6f7 100%)}
.hero-grid{display:grid;grid-template-columns:1.02fr .98fr;gap:60px;align-items:center}
.kicker{display:inline-flex;align-items:center;gap:9px;color:var(--red);font-weight:900;text-transform:uppercase;letter-spacing:.1em;font-size:.76rem}
.kicker:before{content:"";width:26px;height:3px;border-radius:3px;background:var(--red)}
h1,h2,h3{line-height:1.08;letter-spacing:-.045em}
h1{font-size:clamp(3rem,7vw,6rem);margin:.2em 0 .28em}
h2{font-size:clamp(2rem,4vw,3.7rem);margin:0 0 .45em}
h3{font-size:1.3rem;margin:.2em 0 .55em}
.lead{font-size:clamp(1.08rem,2vw,1.3rem);color:var(--muted);max-width:760px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.button{display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:0 22px;border-radius:999px;text-decoration:none;font-weight:900;border:1px solid transparent;transition:.2s}
.button:hover{transform:translateY(-2px)}
.button-primary{background:var(--red);color:#fff;box-shadow:0 14px 30px rgba(215,25,32,.22)}
.button-secondary{background:#fff;border-color:#d8dade}
.hero-card{background:var(--black);color:#fff;border-radius:34px;padding:30px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.hero-card:before{content:"";position:absolute;width:300px;height:300px;border-radius:50%;background:var(--red);right:-140px;top:-145px;opacity:.35}
.window-scene{aspect-ratio:4/3;border-radius:24px;background:linear-gradient(145deg,#fefefe,#dfe2e6);padding:18px;position:relative;z-index:1}
.window-frame{height:100%;border:16px solid #eceef1;background:linear-gradient(135deg,#c8d8e4,#edf4f8);position:relative}
.window-frame:before{content:"";position:absolute;left:50%;top:0;bottom:0;width:12px;background:#eef0f2;transform:translateX(-50%)}
.window-frame:after{content:"";position:absolute;left:0;right:0;top:54%;height:10px;background:#eef0f2}
.handle{position:absolute;right:42%;top:42%;width:8px;height:42px;border-radius:5px;background:#6e747d;z-index:3}
.hero-card-copy{position:relative;z-index:1;margin-top:22px}
.hero-card-copy p{color:#c7c9ce}
.section{padding:94px 0}
.section.soft{background:var(--soft)}
.section.dark{background:var(--black);color:#fff}
.section-heading{max-width:820px;margin-bottom:36px}
.section-heading p{color:var(--muted);font-size:1.08rem}
.dark .section-heading p{color:#b8bbc2}
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:0 9px 32px rgba(14,16,19,.045)}
.card p{color:var(--muted)}
.card-link{font-weight:900;color:var(--red);text-decoration:none}
.icon{width:56px;height:56px;border-radius:18px;background:#ffe8e9;display:grid;place-items:center;font-size:1.55rem;margin-bottom:20px}
.steps{counter-reset:step}
.step{position:relative;padding:30px 25px 30px 82px;background:#fff;border:1px solid var(--line);border-radius:24px}
.step:before{counter-increment:step;content:counter(step);position:absolute;left:24px;top:26px;width:42px;height:42px;border-radius:13px;background:var(--red);color:#fff;display:grid;place-items:center;font-weight:900}
.video-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px;align-items:center}
.video{aspect-ratio:16/9;width:100%;overflow:hidden;border-radius:26px;background:#000;box-shadow:var(--shadow)}
.video iframe{width:100%;height:100%;border:0;display:block}
.feature-panel{background:#fff;border:1px solid var(--line);border-radius:30px;padding:34px}
.feature-panel.dark{background:var(--black);color:#fff;border-color:#272a30}
.feature-panel.dark p{color:#c7cad0}
.checklist{padding:0;margin:20px 0 0;list-style:none}
.checklist li{padding:10px 0 10px 32px;position:relative;border-bottom:1px solid rgba(120,120,120,.16)}
.checklist li:before{content:"✓";position:absolute;left:0;color:var(--red);font-weight:900}
.timeline{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.timeline-item{background:#fff;border:1px solid var(--line);border-radius:22px;padding:22px;min-height:170px}
.timeline-number{width:38px;height:38px;border-radius:12px;background:var(--red);color:#fff;display:grid;place-items:center;font-weight:900;margin-bottom:18px}
.screen-placeholder{aspect-ratio:16/10;border-radius:22px;background:linear-gradient(145deg,#f7f8fa,#dfe3e8);border:1px solid #d8dbe0;display:grid;place-items:center;color:#6f747c;font-weight:850;text-align:center;padding:25px}
.screen-placeholder:before{content:"";display:block;width:70%;height:55%;border-radius:14px;border:8px solid #fff;background:linear-gradient(135deg,#fff,#eceff3);box-shadow:0 14px 30px rgba(14,16,19,.1);margin-bottom:15px}
.logo-panel{display:inline-flex;align-items:center;gap:14px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:14px 18px}
.oh-logo{font-size:1.3rem;font-weight:950;letter-spacing:-.06em}
.oh-logo .red{color:var(--red)}
.notice{border-left:5px solid var(--red);background:#fff3f3;padding:20px 22px;border-radius:0 18px 18px 0}
.faq details{background:#fff;border:1px solid var(--line);border-radius:18px;padding:20px 22px;margin-bottom:12px}
.faq summary{font-weight:900;cursor:pointer}
.faq details p{color:var(--muted)}
.cta{padding:48px;background:linear-gradient(135deg,var(--black),#2b2d33);border-radius:34px;color:#fff;position:relative;overflow:hidden}
.cta:after{content:"";position:absolute;width:320px;height:320px;border-radius:50%;background:var(--red);right:-160px;top:-160px;opacity:.4}
.cta>*{position:relative;z-index:1}
.cta p{color:#c7cad0;max-width:720px}
.page-hero{padding:74px 0 54px;background:linear-gradient(180deg,#fff,#f5f6f7)}
.breadcrumbs{font-size:.88rem;color:var(--muted);display:flex;gap:8px;flex-wrap:wrap}
.content-layout{display:grid;grid-template-columns:260px 1fr;gap:50px;padding-top:66px;padding-bottom:94px}
.toc{position:sticky;top:105px;align-self:start;border:1px solid var(--line);border-radius:22px;padding:22px;background:#fff}
.toc a{display:block;text-decoration:none;padding:8px 0;color:var(--muted)}
.article{max-width:840px}
.article h2{font-size:2.2rem;margin-top:1.55em}
.article h3{font-size:1.35rem;margin-top:1.3em}
.article p,.article li{font-size:1.04rem;color:#4e535c}
.article .grid{margin:26px 0}
.site-footer{background:#0c0d10;color:#fff;padding:44px 0}
.footer-grid{display:grid;grid-template-columns:1.3fr .8fr .8fr;gap:40px}
.site-footer a{color:#c8cbd1;text-decoration:none}
.site-footer p{color:#aeb2ba}
.footer-links a{display:block;padding:5px 0}
@media(max-width:1000px){
  .hero-grid,.video-grid,.content-layout,.footer-grid{grid-template-columns:1fr}
  .grid-4,.timeline{grid-template-columns:repeat(2,minmax(0,1fr))}
  .toc{position:static}
}
@media(max-width:900px){
  .nav-toggle{display:block}
  .nav-links{display:none;position:absolute;top:78px;left:0;right:0;background:#fff;padding:18px 20px;border-bottom:1px solid var(--line);flex-direction:column;align-items:flex-start}
  .nav-links.open{display:flex}
}
@media(max-width:700px){
  .container{width:min(calc(100% - 24px),var(--max))}
  .grid-2,.grid-3,.grid-4,.timeline{grid-template-columns:1fr}
  .section{padding:68px 0}
  .hero{padding-top:58px}
  h1{font-size:3.2rem}
}

.section.dark .feature-panel:not(.dark){
  background:#fff;
  color:var(--ink);
}
.section.dark .feature-panel:not(.dark) h2,
.section.dark .feature-panel:not(.dark) h3{
  color:var(--ink);
}
.section.dark .feature-panel:not(.dark) p,
.section.dark .feature-panel:not(.dark) li{
  color:var(--muted);
}
.price-panel{
  background:linear-gradient(135deg,#fff,#f3f4f6);
  border:1px solid var(--line);
  border-radius:32px;
  padding:36px;
  box-shadow:var(--shadow);
}
.price-number{
  font-size:clamp(3rem,7vw,5.8rem);
  line-height:1;
  font-weight:950;
  letter-spacing:-.06em;
  color:var(--red);
  margin:.15em 0;
}