:root{
  --bg:#fff; --text:#111; --muted:#6e6e73; --line:#e5e5ea; --card:#f5f5f7;
  --black:#000; --blue:#0071e3; --radius:28px; --max:1180px;
}
*{box-sizing:border-box} html{scroll-behavior:smooth} body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"SF Pro Text","Segoe UI",Roboto,"PingFang SC","Microsoft YaHei",Arial,sans-serif;-webkit-font-smoothing:antialiased} a{color:inherit}.nav{height:56px;display:flex;align-items:center;justify-content:space-between;padding:0 max(22px,calc((100vw - var(--max))/2));position:sticky;top:0;z-index:50;background:rgba(255,255,255,.78);backdrop-filter:blur(22px);border-bottom:1px solid rgba(0,0,0,.06)}.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700}.brand img{width:30px;height:30px;object-fit:contain}.nav nav{display:flex;gap:24px}.nav nav a{text-decoration:none;font-size:14px;color:#333}.nav nav a:hover{color:var(--blue)}.hero{max-width:var(--max);margin:0 auto;padding:96px 22px;text-align:center}.hero.full{min-height:calc(100vh - 56px);display:flex;flex-direction:column;align-items:center;justify-content:center}.eyebrow{font-weight:700;color:#86868b;letter-spacing:.08em;text-transform:uppercase;margin:0 0 12px}.hero h1,.custom-hero h1{font-size:clamp(48px,8vw,106px);line-height:.96;letter-spacing:-.06em;margin:0 0 22px}.hero-copy{font-size:clamp(19px,2.2vw,28px);line-height:1.25;color:var(--muted);max-width:760px;margin:0 auto 28px}.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}.btn{border:0;border-radius:999px;padding:12px 22px;text-decoration:none;font-weight:600;font-size:16px;cursor:pointer;display:inline-flex;justify-content:center;align-items:center}.btn.primary{background:var(--blue);color:#fff}.btn.secondary{background:#f5f5f7;color:#1d1d1f}.btn.wide{width:100%;margin-top:16px}.fold-stage{width:min(900px,96vw);margin:54px auto 24px;perspective:1600px}.phone.unfolded{height:430px;border-radius:38px;background:#161616;padding:14px;display:grid;grid-template-columns:1fr 16px 1fr;box-shadow:0 34px 90px rgba(0,0,0,.22), inset 0 0 0 1px rgba(255,255,255,.12);transform:rotateX(5deg)}.screen{border-radius:28px;background:linear-gradient(145deg,#f8fafc,#e8ecf4);position:relative;overflow:hidden;display:flex;align-items:center;justify-content:center;font-weight:800;color:#111;font-size:34px}.right-screen{background:radial-gradient(circle at 30% 20%,#fff 0,#e9f2ff 34%,#cfd8ea 100%)}.left-screen{background:radial-gradient(circle at 20% 20%,#fff,#f1f1f3)}.hinge{background:linear-gradient(90deg,#2a2a2c,#777,#222);border-radius:99px;margin:4px 0}.camera-bar{position:absolute;top:16px;left:16px;background:#111;border-radius:999px;padding:5px;display:flex;gap:5px}.camera-bar span{width:12px;height:12px;border-radius:50%;background:#555;border:1px solid #999}.os-card{position:absolute;right:28px;bottom:28px;text-align:left;background:rgba(255,255,255,.74);backdrop-filter:blur(12px);padding:18px;border-radius:20px;font-size:22px;box-shadow:0 12px 40px rgba(0,0,0,.1)}.os-card small{font-size:13px;color:var(--muted)}.demo-ui{width:72%;display:grid;gap:12px;text-align:left;background:rgba(255,255,255,.72);backdrop-filter:blur(14px);border-radius:24px;padding:22px;box-shadow:0 16px 40px rgba(0,0,0,.08)}.demo-ui b{font-size:26px;letter-spacing:-.03em}.demo-ui span{font-size:15px;color:#5f6368;background:rgba(255,255,255,.72);border-radius:999px;padding:10px 12px}.wide-ui{width:72%}.price-line{font-size:19px;color:var(--muted)}.section{max-width:var(--max);margin:0 auto;padding:90px 22px;border-top:1px solid rgba(0,0,0,.06)}.section h2{font-size:clamp(38px,5vw,72px);line-height:1;letter-spacing:-.045em;margin:0 0 24px}.section p{font-size:19px;line-height:1.55;color:var(--muted)}.split{display:grid;grid-template-columns:1.1fr .9fr;gap:34px;align-items:center}.split.reverse{grid-template-columns:.9fr 1.1fr}.feature-card,.big-card{background:var(--card);border-radius:var(--radius);padding:34px;box-shadow:inset 0 0 0 1px rgba(0,0,0,.03)}.dark-card{background:#111;color:#fff}.dark-card p{color:#cfcfd4}.feature-card h3,.grid h3{font-size:28px;letter-spacing:-.02em;margin:0 0 12px}.grid{display:grid;gap:20px}.grid.three{grid-template-columns:repeat(3,1fr);margin-top:28px}.grid article{background:#fff;border-radius:22px;padding:24px}.spec-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:32px}.spec-grid div{background:var(--card);border-radius:20px;padding:22px;min-height:120px}.spec-grid strong{display:block;font-size:15px;color:#86868b;margin-bottom:14px}.spec-grid span{font-size:20px;font-weight:700;letter-spacing:-.02em}.cta{text-align:center;background:#f5f5f7;border-radius:34px;margin-top:60px;margin-bottom:60px}.cta p{margin-bottom:24px}.custom-page{max-width:var(--max);margin:0 auto;padding:70px 22px}.custom-hero{display:grid;grid-template-columns:1fr 380px;gap:44px;align-items:start;margin-bottom:54px}.custom-hero h1{text-align:left;font-size:clamp(46px,6vw,82px)}.custom-hero .hero-copy{margin-left:0;max-width:690px}.summary-card{background:#f5f5f7;border-radius:30px;padding:26px;box-shadow:inset 0 0 0 1px rgba(0,0,0,.04)}.sticky{position:sticky;top:78px}.summary-card h2{font-size:46px;letter-spacing:-.04em;margin:18px 0 8px}.summary-card p{color:var(--muted);line-height:1.45}.fineprint{font-size:13px}.mini-fold{height:160px;background:#111;border-radius:28px;padding:8px;display:grid;grid-template-columns:1fr 8px 1fr;gap:5px}.mini-fold div{background:linear-gradient(145deg,#fff,#dce7f7);border-radius:20px}.mini-fold span{background:#555;border-radius:99px}.config-layout{max-width:760px}.config-list{display:grid;gap:22px}.option-group{padding:30px;border:1px solid var(--line);border-radius:28px}.option-group h2{margin:0 0 20px;font-size:28px;letter-spacing:-.03em}.option-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.option-row.vertical{grid-template-columns:1fr}.choice{display:flex;align-items:center;justify-content:space-between;gap:14px;border:2px solid #d2d2d7;border-radius:18px;padding:18px;cursor:pointer;min-height:76px;transition:.2s}.choice:has(input:checked){border-color:#111;box-shadow:0 0 0 1px #111}.choice input{accent-color:#111}.choice span{font-weight:700}.choice small{color:var(--muted)}footer{max-width:var(--max);margin:0 auto;padding:32px 22px 50px;border-top:1px solid rgba(0,0,0,.06);display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;color:#86868b}footer strong{color:#111}@media(max-width:900px){.nav nav{gap:12px}.phone.unfolded{height:300px;border-radius:28px}.screen{font-size:24px}.os-card{font-size:16px;right:16px;bottom:16px}.split,.split.reverse,.custom-hero{grid-template-columns:1fr}.grid.three,.spec-grid,.option-row{grid-template-columns:1fr}.sticky{position:static}.hero{padding:70px 18px}.section{padding:70px 18px}.custom-page{padding:50px 18px}.custom-hero h1{text-align:left}}