:root {
  --ink: #111827;
  --muted: #64748b;
  --line: rgba(15, 23, 42, 0.11);
  --paper: #ffffff;
  --soft: #f6f8fb;
  --blue: #2563eb;
  --teal: #0f9f8f;
  --gold: #d69e2e;
  --green: #16a34a;
  --shadow: 0 24px 70px rgba(15, 23, 42, 0.12);
  --radius: 8px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body { margin: 0; font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; color: var(--ink); background: var(--paper); line-height: 1.6; overflow-x: hidden; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
.container { width: min(1500px, calc(100% - 40px)); margin: 0 auto; }
.topbar { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.92); border-bottom: 1px solid var(--line); backdrop-filter: blur(18px); }
.nav { height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
.brand { display: inline-flex; align-items: center; gap: 12px; font-weight: 850; letter-spacing: -.03em; }
.brand img { width: 42px; height: 42px; object-fit: contain; }
.nav-links { display: flex; align-items: center; gap: 22px; color: #475569; font-size: .92rem; font-weight: 750; }
.nav-links a:hover { color: var(--blue); }
.btn { display: inline-flex; align-items: center; justify-content: center; min-height: 44px; padding: 0 18px; border-radius: var(--radius); border: 1px solid transparent; font-weight: 800; font-size: .92rem; cursor: pointer; transition: .2s ease; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: #fff; background: var(--ink); box-shadow: 0 14px 28px rgba(17,24,39,.16); }
.btn-blue { color: #fff; background: var(--blue); box-shadow: 0 14px 28px rgba(37,99,235,.24); }
.btn-ghost { border-color: var(--line); background: #fff; color: var(--ink); }
.mobile-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: #fff; border-radius: var(--radius); }
.mobile-toggle span { display: block; width: 18px; height: 2px; background: var(--ink); margin: 4px auto; }
.hero { padding: 62px 0 44px; background: linear-gradient(145deg, #fff 0%, #f5f7fb 100%); }
.hero-grid { display: grid; grid-template-columns: 1fr .92fr; gap: 48px; align-items: center; }
.kicker { margin: 0 0 12px; color: var(--blue); font-weight: 850; text-transform: uppercase; letter-spacing: .12em; font-size: .74rem; }
h1,h2,h3,p { margin-top: 0; }
h1 { margin-bottom: 18px; font-size: clamp(2.45rem, 5vw, 5.1rem); line-height: .98; letter-spacing: -.065em; }
h2 { margin-bottom: 12px; font-size: clamp(1.9rem, 3.2vw, 3.05rem); line-height: 1.04; letter-spacing: -.055em; }
h3 { letter-spacing: -.035em; }
.hero-copy, .section-lead { color: var(--muted); font-size: 1.04rem; max-width: 680px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.logo-board { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.logo-tile { min-height: 145px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; display: grid; place-items: center; padding: 22px; box-shadow: 0 16px 42px rgba(15,23,42,.08); }
.logo-tile img { max-height: 95px; object-fit: contain; }
.section { padding: 68px 0; }
.section-soft { background: var(--soft); }
.product-shell { display: grid; grid-template-columns: 310px 1fr; gap: 18px; align-items: stretch; }
.product-menu { position: sticky; top: 92px; align-self: start; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: 0 16px 42px rgba(15,23,42,.07); overflow: hidden; }
.menu-head { padding: 18px; border-bottom: 1px solid var(--line); }
.menu-head strong { display: block; font-size: 1.04rem; letter-spacing: -.03em; }
.menu-head span { color: var(--muted); font-size: .88rem; }
.product-link { width: 100%; border: 0; background: #fff; border-bottom: 1px solid var(--line); padding: 16px 18px; text-align: left; cursor: pointer; display: grid; grid-template-columns: 44px 1fr; gap: 12px; align-items: center; }
.product-link:last-child { border-bottom: 0; }
.product-link:hover, .product-link.active { background: #f8fafc; }
.product-link.active { box-shadow: inset 4px 0 0 var(--blue); }
.product-link img { width: 44px; height: 44px; object-fit: contain; border-radius: var(--radius); }
.product-link strong { display: block; letter-spacing: -.025em; }
.product-link span { display: block; color: var(--muted); font-size: .82rem; }
.frame-card { border: 1px solid var(--line); border-radius: var(--radius); background: #fff; overflow: hidden; box-shadow: var(--shadow); min-height: 1180px; }
.product-frame { width: 100%; min-height: 1180px; border: 0; display: block; background: #fff; }
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.card { border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; background: #fff; }
.card p { color: var(--muted); margin-bottom: 0; font-size: .95rem; }
.cta { padding: 72px 0; background: #111827; color: #fff; }
.cta-grid { display: grid; grid-template-columns: 1fr auto; gap: 32px; align-items: center; }
.cta p { color: rgba(255,255,255,.72); max-width: 680px; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-end; }
.footer { padding: 30px 0; border-top: 1px solid var(--line); background: #fff; color: #64748b; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
.footer-links { display: flex; gap: 16px; flex-wrap: wrap; }
.simple-footer { padding: 22px 16px; border-top: 1px solid var(--line); background: #fff; color: #64748b; text-align: center; font-size: .92rem; font-weight: 750; }
.simple-footer span { display: inline-flex; align-items: center; gap: 10px; justify-content: center; flex-wrap: wrap; }

.child-body { background: #fff; }
.child-wrap { padding: 30px; }
.child-hero { display: grid; grid-template-columns: 1fr; gap: 28px; align-items: stretch; }
.child-logo { width: 72px; height: 72px; object-fit: contain; margin-bottom: 14px; }
.child-hero h1 { max-width: 980px; font-size: clamp(2.1rem, 4.8vw, 4.1rem); }
.child-tabs { display: flex; flex-wrap: wrap; gap: 8px; margin: 22px 0 0; }
.child-tabs a { min-height: 36px; display: inline-flex; align-items: center; border: 1px solid var(--line); border-radius: 999px; padding: 0 13px; font-weight: 800; font-size: .84rem; background: #fff; }
.child-tabs a:hover { border-color: var(--blue); color: var(--blue); }
.slider { position: relative; width: 100%; border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: #f8fafc; box-shadow: 0 18px 48px rgba(15,23,42,.1); }
.zoom-controls { position: absolute; top: 12px; right: 12px; z-index: 4; display: flex; gap: 6px; padding: 6px; border: 1px solid rgba(15,23,42,.08); border-radius: 999px; background: rgba(255,255,255,.86); backdrop-filter: blur(12px); box-shadow: 0 10px 26px rgba(15,23,42,.12); }
.zoom-btn { width: 34px; height: 34px; border: 0; border-radius: 999px; background: #111827; color: #fff; font-size: 1rem; font-weight: 900; cursor: pointer; }
.zoom-btn.reset { background: #fff; color: #111827; border: 1px solid var(--line); font-size: .78rem; }
.slide-stage { height: clamp(540px, 72vh, 760px); position: relative; overflow: hidden; }
.slide { position: absolute; inset: 0; opacity: 0; transform: scale(1.015); transition: opacity .55s ease, transform .55s ease; display: grid; place-items: center; background: #f8fafc; padding: 16px; }
.slide.active { opacity: 1; transform: scale(1); }
.slide img { width: 100%; height: 100%; object-fit: contain; object-position: center; }
.slide img.zoomed { cursor: zoom-out; }
.slide img.panning { cursor: grabbing; }
.slide.portrait img { width: auto; max-width: 100%; object-fit: contain; padding: 0; }
.slider-btn { position: absolute; top: 50%; translate: 0 -50%; width: 42px; height: 42px; border: 1px solid rgba(255,255,255,.7); border-radius: 99px; background: rgba(17,24,39,.72); color: #fff; cursor: pointer; font-size: 1.5rem; line-height: 1; }
.slider-btn.prev { left: 12px; }
.slider-btn.next { right: 12px; }
.slider-meta { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 14px; border-top: 1px solid var(--line); background: #fff; }
.slider-title { font-weight: 850; letter-spacing: -.02em; }
.dots { display: flex; gap: 6px; }
.dot { width: 8px; height: 8px; border: 0; border-radius: 99px; background: #cbd5e1; cursor: pointer; padding: 0; }
.dot.active { width: 22px; background: var(--blue); }
.child-section { padding: 42px 0 0; }
.info-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.platform-list { list-style: none; padding: 0; margin: 14px 0 0; display: grid; gap: 10px; color: #475569; }
.platform-list li { display: flex; gap: 10px; }
.platform-list li:before { content: ""; width: 9px; height: 9px; border-radius: 99px; background: var(--blue); flex: 0 0 auto; margin-top: 9px; }

@media (max-width: 980px) {
  .nav-links { position: fixed; top: 74px; left: 20px; right: 20px; display: none; flex-direction: column; align-items: stretch; gap: 0; padding: 10px; border: 1px solid var(--line); border-radius: var(--radius); background: #fff; box-shadow: var(--shadow); }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 13px 12px; border-radius: var(--radius); }
  .mobile-toggle { display: block; }
  .nav .btn-blue { display: none; }
  .hero-grid, .child-hero, .cta-grid, .product-shell { grid-template-columns: 1fr; }
  .product-menu { position: static; }
  .feature-grid, .info-grid { grid-template-columns: 1fr 1fr; }
  .cta-actions { justify-content: flex-start; }
}
@media (max-width: 640px) {
  body { background: #eef2f7; }
  .container { width: min(100% - 28px, 1500px); }
  .topbar { background: rgba(255,255,255,.96); }
  .nav { height: 64px; }
  .brand img { width: 36px; height: 36px; }
  .brand span { font-size: .98rem; }
  .hero { padding: 36px 0 28px; background: #eef2f7; }
  .section { padding: 34px 0; }
  h1 { font-size: 2.35rem; letter-spacing: -.05em; }
  h2 { font-size: 1.78rem; letter-spacing: -.04em; }
  .hero-copy, .section-lead { font-size: .96rem; }
  .hero-actions .btn { flex: 1 1 150px; }
  .feature-grid, .info-grid { grid-template-columns: 1fr; }
  .logo-board { display: flex; gap: 10px; overflow-x: auto; padding: 4px 2px 10px; scroll-snap-type: x proximity; scrollbar-width: none; }
  .logo-board::-webkit-scrollbar { display: none; }
  .logo-tile { flex: 0 0 86px; width: 86px; min-height: 74px; padding: 10px; scroll-snap-align: start; border-radius: 16px; }
  .logo-tile img { max-height: 50px; max-width: 66px; }
  .product-shell { gap: 12px; }
  .product-menu { display: flex; gap: 10px; overflow-x: auto; padding: 8px 2px 12px; border: 0; border-radius: 0; background: transparent; box-shadow: none; scrollbar-width: none; }
  .product-menu::-webkit-scrollbar { display: none; }
  .menu-head { display: none; }
  .product-link { flex: 0 0 70px; width: 70px; min-height: 68px; padding: 8px; border: 1px solid rgba(15,23,42,.08); border-radius: 18px; background: #fff; grid-template-columns: 1fr; place-items: center; text-align: center; box-shadow: 0 10px 24px rgba(15,23,42,.08); }
  .product-link img { width: 50px; height: 50px; border-radius: 14px; }
  .product-link span { display: none; }
  .product-link.active { background: #eff6ff; box-shadow: inset 0 0 0 2px var(--blue), 0 12px 26px rgba(37,99,235,.14); }
  .frame-card { min-height: 1380px; border-radius: 20px; border-color: rgba(15,23,42,.08); box-shadow: 0 18px 48px rgba(15,23,42,.12); }
  .product-frame { min-height: 1380px; }
  .child-body { background: #eef2f7; }
  .child-wrap { padding: 14px; }
  .child-logo { width: 64px; height: 64px; margin-bottom: 12px; }
  .child-hero { gap: 18px; }
  .child-hero h1 { font-size: 2rem; line-height: 1.04; }
  .child-tabs { position: sticky; top: 0; z-index: 5; margin: 18px 0 0; padding: 8px 0; flex-wrap: nowrap; overflow-x: auto; background: rgba(238,242,247,.92); backdrop-filter: blur(12px); scrollbar-width: none; }
  .child-tabs::-webkit-scrollbar { display: none; }
  .child-tabs a { flex: 0 0 auto; min-height: 38px; background: #fff; box-shadow: 0 8px 18px rgba(15,23,42,.06); }
  .slider { border-radius: 20px; box-shadow: 0 18px 48px rgba(15,23,42,.14); }
  .zoom-controls { top: 10px; left: 50%; right: auto; transform: translateX(-50%); padding: 4px; }
  .zoom-btn { width: 34px; height: 34px; }
  .slide-stage { height: auto; aspect-ratio: 2.05 / 1; min-height: 0; overflow: hidden; touch-action: none; overscroll-behavior: contain; background: #f8fafc; }
  .slide { padding: 0; overflow: hidden; touch-action: none; }
  .slide img { width: 100%; height: 100%; max-width: none; object-fit: contain; transform-origin: center center; touch-action: none; user-select: none; -webkit-user-drag: none; }
  .slide.portrait img { width: auto; height: 100%; max-width: none; }
  .slider-btn { width: 40px; height: 40px; font-size: 1.45rem; background: rgba(17,24,39,.72); border: 1px solid rgba(255,255,255,.55); }
  .slider-btn.prev { left: 8px; }
  .slider-btn.next { right: 8px; }
  .slider-meta { min-height: 62px; align-items: flex-start; flex-direction: column; }
  .dots { max-width: 100%; flex-wrap: wrap; }
  .card { border-radius: 16px; padding: 18px; box-shadow: 0 10px 24px rgba(15,23,42,.06); }
  .cta { padding: 38px 0; }
  .cta-actions .btn { width: 100%; }
  .footer { padding: 18px 0; }
  .footer-inner { flex-direction: column; align-items: center; text-align: center; }
  .footer .brand, .footer-links { display: none; }
  .simple-footer { margin-top: 28px; padding: 18px 12px calc(18px + env(safe-area-inset-bottom)); border-radius: 18px 18px 0 0; font-size: .86rem; }
}