:root {
  color-scheme: light;
  --primary: #0071e3;
  --secondary: #7457ef;
  --tint: #eaf3ff;
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --line: rgba(29, 29, 31, .1);
  --surface: rgba(255, 255, 255, .82);
  --max: 1120px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 76% 3%, color-mix(in srgb, var(--secondary) 16%, transparent), transparent 30rem),
    radial-gradient(circle at 15% 15%, color-mix(in srgb, var(--primary) 14%, transparent), transparent 32rem),
    #f5f5f7;
  color: var(--ink);
  font: 400 1rem/1.65 -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
body.costbasis { --primary: #1478e8; --secondary: #675cf0; --tint: #e9f3ff; }
body.youyu { --primary: #c47a10; --secondary: #4f9b69; --tint: #fff4dd; }
body.gomoku { --primary: #8a5427; --secondary: #2b2b2d; --tint: #f5eadf; }
body.tractor { --primary: #68218f; --secondary: #d09918; --tint: #f4e9fb; }
body.jotly {
  --primary: #3512cf;
  --secondary: #ff5427;
  --tint: #f0edff;
  background:
    radial-gradient(circle at 78% 5%, rgba(255, 84, 39, .14), transparent 28rem),
    radial-gradient(circle at 14% 13%, rgba(53, 18, 207, .18), transparent 34rem),
    #f7f6fa;
}
body.jotly .button.primary {
  background: linear-gradient(135deg, #3512cf, #4b1cff);
  box-shadow: 0 12px 30px rgba(53, 18, 207, .26);
}
body.jotly .button.primary:hover { background: linear-gradient(135deg, #2b0da9, #4015df); }
body.jotly .product-stage::before {
  background: radial-gradient(circle at 44% 42%, rgba(86, 39, 255, .31), rgba(53, 18, 207, .14) 46%, rgba(255, 84, 39, .13) 64%, transparent 72%);
}
body.jotly .stage-panel {
  border-color: rgba(255, 255, 255, .94);
  box-shadow: 0 32px 80px rgba(28, 5, 112, .18);
}
body.jotly .feature-card:nth-child(2) {
  background: linear-gradient(145deg, #ece7ff, #fffaf2 72%, #fff);
}
body.jotly .privacy-card {
  background:
    radial-gradient(circle at 88% 15%, rgba(255, 84, 39, .34), transparent 17rem),
    linear-gradient(135deg, #0b0346, #24108f 62%, #3512cf);
  box-shadow: 0 26px 68px rgba(25, 6, 104, .28);
}
body.jotly .privacy-card .eyebrow { color: #ffc0a7; }
body.jotly .cta-card {
  border-color: rgba(53, 18, 207, .1);
  background:
    radial-gradient(circle at 85% 14%, rgba(255, 84, 39, .11), transparent 18rem),
    linear-gradient(145deg, #ebe6ff, #fff8ea 66%, #fff);
  box-shadow: 0 20px 58px rgba(38, 13, 132, .12);
}
a { color: inherit; }
img { max-width: 100%; }
.wrap { width: min(calc(100% - 2rem), var(--max)); margin-inline: auto; }
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(0,0,0,.06);
  background: rgba(251,251,253,.76);
  box-shadow: 0 1px 0 rgba(255,255,255,.76) inset;
  backdrop-filter: blur(22px) saturate(160%);
}
.nav { min-height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.brand { display: inline-flex; align-items: center; gap: .7rem; text-decoration: none; font-weight: 750; letter-spacing: -.02em; }
.brand-mark { display: grid; place-items: center; width: 2rem; aspect-ratio: 1; border-radius: .62rem; background: linear-gradient(145deg, #1d1d1f, #4a4a4f); color: #fff; font-size: .75rem; box-shadow: 0 6px 18px rgba(0,0,0,.16); }
.nav-actions { display: flex; align-items: center; gap: 1rem; }
.nav-link { color: #515154; text-decoration: none; font-size: .86rem; font-weight: 620; }
.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: .65rem 1.15rem;
  border: 0;
  border-radius: 999px;
  background: rgba(0,0,0,.06);
  color: var(--ink);
  text-decoration: none;
  font-weight: 720;
  transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}
.button:hover { transform: translateY(-1px); background: rgba(0,0,0,.1); }
.button.primary { background: var(--primary); color: #fff; box-shadow: 0 12px 28px color-mix(in srgb, var(--primary) 24%, transparent); }
.button.primary:hover { background: color-mix(in srgb, var(--primary) 90%, #000); }
.nav-cta { min-height: 38px; padding: .4rem .9rem; font-size: .82rem; }
.hero { min-height: calc(100svh - 64px); display: grid; align-items: center; padding: clamp(4.5rem, 9vw, 8rem) 0; overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.08fr) minmax(19rem, .92fr); gap: clamp(3rem, 8vw, 7rem); align-items: center; }
.app-identity { display: flex; align-items: center; gap: 1rem; margin-bottom: 1.6rem; }
.app-icon { display: block; flex: 0 0 auto; width: 5rem; height: 5rem; object-fit: cover; border-radius: 1.25rem; box-shadow: 0 18px 38px rgba(37,39,52,.2); }
.app-identity strong { display: block; font-size: 1.08rem; letter-spacing: -.02em; }
.app-identity span { color: var(--muted); font-size: .88rem; }
.eyebrow { margin: 0 0 .65rem; color: var(--primary); font-size: .76rem; font-weight: 760; letter-spacing: .12em; text-transform: uppercase; }
h1 { max-width: 10.5ch; margin: 0; font-size: clamp(3.6rem, 8vw, 7.4rem); line-height: .92; letter-spacing: -.07em; }
.hero-copy { max-width: 39rem; margin: 1.5rem 0 0; color: #515154; font-size: clamp(1.08rem, 2vw, 1.3rem); line-height: 1.6; letter-spacing: -.014em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .75rem; margin-top: 2rem; }
.hero-feature-tags { display: flex; flex-wrap: wrap; gap: .5rem; margin: 1.35rem 0 0; padding: 0; list-style: none; }
.hero-feature-tags li { padding: .42rem .7rem; border: 1px solid color-mix(in srgb, var(--primary) 18%, transparent); border-radius: 999px; background: color-mix(in srgb, var(--tint) 70%, #fff); color: #515154; font-size: .78rem; font-weight: 680; line-height: 1.2; }
.fine-print { margin: .85rem 0 0; color: #86868b; font-size: .8rem; }
.product-stage {
  position: relative;
  min-height: 30rem;
  display: grid;
  place-items: center;
  isolation: isolate;
}
.product-stage::before { content: ""; position: absolute; width: min(31rem, 100%); aspect-ratio: 1; border-radius: 50%; background: radial-gradient(circle, color-mix(in srgb, var(--primary) 26%, #fff), color-mix(in srgb, var(--secondary) 12%, transparent) 58%, transparent 70%); filter: blur(4px); z-index: -2; }
.stage-panel { width: min(100%, 26rem); padding: 1.35rem; border: 1px solid rgba(255,255,255,.92); border-radius: 2rem; background: rgba(255,255,255,.76); box-shadow: 0 32px 80px rgba(54,58,79,.16); backdrop-filter: blur(24px) saturate(140%); transform: rotate(-2deg); }
.stage-top { display: flex; align-items: center; gap: .9rem; padding-bottom: 1.1rem; border-bottom: 1px solid var(--line); }
.stage-top img { display: block; flex: 0 0 auto; width: 4rem; height: 4rem; object-fit: cover; border-radius: 1rem; box-shadow: 0 10px 25px rgba(0,0,0,.15); }
.stage-top strong { display: block; font-size: 1.08rem; }
.stage-top span { color: var(--muted); font-size: .82rem; }
.glance { display: grid; gap: .65rem; margin-top: 1rem; }
.glance-row { display: flex; justify-content: space-between; gap: 1rem; padding: .9rem 1rem; border-radius: 1rem; background: color-mix(in srgb, var(--tint) 74%, #fff); }
.glance-row span { color: #515154; font-size: .88rem; }
.glance-row strong { color: var(--primary); font-size: .88rem; text-align: right; }
.float-card { position: absolute; right: -.5rem; bottom: 1.5rem; max-width: 12rem; padding: 1rem 1.1rem; border: 1px solid rgba(255,255,255,.9); border-radius: 1.25rem; background: rgba(255,255,255,.9); box-shadow: 0 20px 45px rgba(54,58,79,.15); font-size: .86rem; font-weight: 700; transform: rotate(3deg); }
.float-card::before { content: "✓"; display: inline-grid; place-items: center; width: 1.5rem; aspect-ratio: 1; margin-right: .45rem; border-radius: 50%; background: var(--primary); color: #fff; }
section { padding: clamp(5.5rem, 10vw, 9rem) 0; }
.section-head { display: grid; grid-template-columns: .72fr 1fr; gap: clamp(2rem, 7vw, 6rem); align-items: end; margin-bottom: 3rem; }
h2 { max-width: 12ch; margin: 0; font-size: clamp(2.6rem, 5vw, 4.8rem); line-height: .98; letter-spacing: -.06em; }
.section-intro { max-width: 43rem; margin: 0; color: var(--muted); font-size: 1.08rem; }
.features { border-block: 1px solid rgba(0,0,0,.055); background: rgba(251,251,253,.72); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.feature-card { min-height: 21rem; display: flex; flex-direction: column; justify-content: space-between; padding: clamp(1.5rem, 3vw, 2.2rem); border: 1px solid rgba(0,0,0,.055); border-radius: 1.8rem; background: #fff; box-shadow: 0 16px 45px rgba(54,58,79,.07); }
.feature-card:nth-child(2) { background: linear-gradient(145deg, var(--tint), #fff); }
.feature-index { display: grid; place-items: center; width: 2.4rem; aspect-ratio: 1; border-radius: .8rem; background: var(--primary); color: #fff; font-size: .78rem; font-weight: 780; }
.feature-card h3 { margin: 1.5rem 0 .7rem; font-size: clamp(1.45rem, 2.5vw, 2.1rem); line-height: 1.08; letter-spacing: -.04em; }
.feature-card p { margin: 0; color: var(--muted); }
.feature-detail { margin-top: 1.4rem; color: var(--primary); font-size: .83rem; font-weight: 730; }
.detail-section { padding-top: 0; }
.detail-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; }
.detail-item { padding: clamp(1.4rem, 3vw, 2rem); border: 1px solid rgba(0,0,0,.06); border-radius: 1.5rem; background: rgba(255,255,255,.8); box-shadow: 0 12px 35px rgba(54,58,79,.055); }
.detail-item h3 { margin: 0 0 .55rem; font-size: 1.2rem; letter-spacing: -.025em; }
.detail-item p { margin: 0; color: var(--muted); }
.detail-item strong { color: var(--ink); }
.workflow-grid { display: grid; grid-template-columns: .72fr 1fr; gap: clamp(2rem, 7vw, 6rem); align-items: start; }
.workflow-intro { position: sticky; top: 104px; }
.workflow-intro p { max-width: 27rem; color: var(--muted); font-size: 1.05rem; }
.steps { border-top: 1px solid var(--line); }
.step { display: grid; grid-template-columns: 3rem 1fr; gap: 1rem; padding: 1.6rem 0; border-bottom: 1px solid var(--line); }
.step-number { color: var(--primary); font-size: .78rem; font-weight: 780; letter-spacing: .08em; }
.step h3 { margin: 0 0 .35rem; font-size: 1.3rem; letter-spacing: -.025em; }
.step p { margin: 0; color: var(--muted); }
.privacy-band { padding-top: 0; }
.privacy-card { display: grid; grid-template-columns: 1fr auto; gap: 2rem; align-items: center; padding: clamp(2rem, 6vw, 4.5rem); border-radius: 2rem; background: linear-gradient(135deg, #1d1d1f, #343439); color: #fff; box-shadow: 0 26px 65px rgba(29,29,31,.2); }
.privacy-card .eyebrow { color: color-mix(in srgb, var(--primary) 65%, #fff); }
.privacy-card h2 { max-width: 14ch; color: #fff; }
.privacy-card p { max-width: 40rem; margin: 1rem 0 0; color: #c7c7cc; }
.privacy-card .button { background: #fff; color: #1d1d1f; white-space: nowrap; }
.final-cta { padding-top: 0; }
.cta-card { text-align: center; padding: clamp(3.5rem, 9vw, 7rem) 1.5rem; border: 1px solid rgba(0,0,0,.055); border-radius: 2rem; background: linear-gradient(145deg, color-mix(in srgb, var(--tint) 80%, #fff), #fff); box-shadow: 0 20px 55px rgba(54,58,79,.08); }
.cta-card h2 { max-width: 15ch; margin-inline: auto; }
.cta-card p { max-width: 35rem; margin: 1.2rem auto 1.8rem; color: var(--muted); font-size: 1.08rem; }
.cta-actions { display: flex; justify-content: center; flex-wrap: wrap; gap: .75rem; }
footer { padding: 0 0 3rem; color: #86868b; font-size: .85rem; }
.footer-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-top: 1.5rem; border-top: 1px solid var(--line); }
.footer-links { display: flex; flex-wrap: wrap; gap: 1rem; }
.footer-links a { color: #515154; font-weight: 620; text-decoration: none; }
.footer-links a:hover, .nav-link:hover { color: var(--primary); }
:focus-visible { outline: 3px solid var(--primary); outline-offset: 4px; }
@media (max-width: 820px) {
  .hero { min-height: auto; }
  .hero-grid, .section-head, .workflow-grid { grid-template-columns: 1fr; }
  .product-stage { min-height: 26rem; }
  .feature-grid { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: 1fr; }
  .feature-card { min-height: 15rem; }
  .workflow-intro { position: static; }
  .privacy-card { grid-template-columns: 1fr; }
  .privacy-card .button { justify-self: start; }
}
@media (max-width: 560px) {
  .wrap { width: min(calc(100% - 1.25rem), var(--max)); }
  .brand > span:last-child, .nav-link { display: none; }
  .nav-actions { gap: .4rem; }
  .hero { padding: 4.25rem 0 5rem; }
  .hero-grid { gap: 2.5rem; }
  .app-identity { margin-bottom: 1.35rem; }
  .app-icon { width: 4.35rem; height: 4.35rem; border-radius: 1.05rem; }
  h1 { font-size: clamp(3.15rem, 15.5vw, 4.35rem); }
  .hero-copy { font-size: 1.05rem; }
  .hero-actions .button { width: 100%; }
  .product-stage { min-height: 23rem; }
  .stage-panel { width: calc(100% - 1rem); padding: 1.1rem; border-radius: 1.5rem; transform: none; }
  .float-card { right: 0; bottom: 0; }
  section { padding: 5rem 0; }
  .section-head { gap: 1.25rem; margin-bottom: 2rem; }
  h2 { font-size: clamp(2.5rem, 12vw, 3.4rem); }
  .feature-card { min-height: 14rem; padding: 1.4rem; border-radius: 1.4rem; }
  .step { grid-template-columns: 2.2rem 1fr; }
  .privacy-card, .cta-card { border-radius: 1.5rem; }
  .footer-row { align-items: flex-start; flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}