:root {
  --green-900: #052e1a;
  --green-800: #064e2b;
  --green-700: #047a3d;
  --green-600: #0f9d4f;
  --green-500: #22c55e;
  --green-50: #f0fdf4;
  --yellow-500: #facc15;
  --yellow-400: #fde047;
  --yellow-600: #eab308;
  --ink: #0f1f17;
  --muted: #4b5f55;
  --line: #dcefe3;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(5, 46, 26, 0.08);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Inter", "Noto Sans JP", system-ui, sans-serif;
  color: var(--ink);
  background: #fff;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
html[lang="ja"] body { font-family: "Noto Sans JP", "Inter", system-ui, sans-serif; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1180px, 92%); margin: 0 auto; }

/* Header */
.header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 24px; }
.brand { display: flex; align-items: center; gap: 6px; }
.brand-logo { height: 40px; width: auto; }
.brand-name { font-weight: 800; font-size: 1.25rem; color: var(--green-800); letter-spacing: -0.02em; }
.accent { color: var(--yellow-600); }
.nav-links { display: flex; gap: 28px; font-weight: 500; font-size: 0.95rem; }
.nav-links a { color: var(--muted); transition: color .2s; }
.nav-links a:hover { color: var(--green-700); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.lang-switch { display: flex; border: 1px solid var(--line); border-radius: 999px; padding: 3px; background: var(--green-50); }
.lang-switch button {
  border: 0; background: transparent; cursor: pointer;
  padding: 6px 14px; border-radius: 999px; font-weight: 600; font-size: 0.85rem; color: var(--muted);
  font-family: inherit;
}
.lang-switch button.active { background: var(--green-700); color: #fff; }
.menu-toggle { display: none; border: 0; background: none; font-size: 1.5rem; cursor: pointer; color: var(--green-800); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 14px 28px; border-radius: 999px; font-weight: 700; font-size: 1rem;
  border: 2px solid transparent; cursor: pointer; transition: transform .2s, box-shadow .2s, background .2s;
  font-family: inherit;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--yellow-500); color: var(--green-900); box-shadow: 0 8px 24px rgba(250, 204, 21, 0.35); }
.btn-primary:hover { background: var(--yellow-400); }
.btn-ghost { border-color: rgba(255,255,255,.5); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,.1); }

/* Hero */
.hero {
  position: relative; overflow: hidden; color: #fff;
  background: radial-gradient(circle at 80% 20%, rgba(250,204,21,.25), transparent 40%),
              linear-gradient(135deg, var(--green-900) 0%, var(--green-800) 55%, var(--green-700) 100%);
  padding: 110px 0 120px;
}
.grid-bg {
  position: absolute; inset: 0; opacity: .12;
  background-image: linear-gradient(rgba(255,255,255,.4) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(255,255,255,.4) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(circle at 50% 40%, #000 30%, transparent 75%);
}
.hero-inner { position: relative; display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 48px; align-items: center; }
.badge {
  display: inline-block; padding: 6px 16px; border-radius: 999px;
  background: rgba(250,204,21,.15); color: var(--yellow-400); border: 1px solid rgba(250,204,21,.4);
  font-size: 0.85rem; font-weight: 600; margin-bottom: 24px;
}
.hero h1 { font-size: clamp(2.2rem, 4.6vw, 3.6rem); line-height: 1.2; font-weight: 800; letter-spacing: -0.02em; margin-bottom: 24px; }
html[lang="ja"] .hero h1 { line-height: 1.35; letter-spacing: 0; }
.hl { color: var(--yellow-500); }
.lead { font-size: 1.15rem; color: rgba(255,255,255,.85); max-width: 600px; margin-bottom: 36px; }
.hero-cta { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 36px; }
.hero-tags { display: flex; gap: 10px; flex-wrap: wrap; list-style: none; }
.hero-tags li { padding: 4px 12px; border-radius: 8px; background: rgba(255,255,255,.08); font-size: .85rem; color: rgba(255,255,255,.8); }

.hero-visual { display: flex; justify-content: center; }
.orbit {
  position: relative; width: 360px; height: 360px; border-radius: 50%;
  border: 1px dashed rgba(250,204,21,.45);
  animation: spin 40s linear infinite;
}
.orbit::before {
  content: ""; position: absolute; inset: 60px; border-radius: 50%;
  border: 1px solid rgba(255,255,255,.18);
}
.core {
  position: absolute; inset: 120px; border-radius: 50%;
  display: grid; place-items: center; font-weight: 900; font-size: 2.2rem; color: var(--green-900);
  background: radial-gradient(circle, var(--yellow-400), var(--yellow-600));
  box-shadow: 0 0 60px rgba(250,204,21,.6);
  animation: spin 40s linear infinite reverse;
}
.node {
  position: absolute; width: 76px; height: 76px; border-radius: 50%;
  display: grid; place-items: center; font-size: .8rem; font-weight: 700;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.3); backdrop-filter: blur(6px);
  animation: spin 40s linear infinite reverse;
}
.n1 { top: -38px; left: calc(50% - 38px); }
.n2 { bottom: -38px; left: calc(50% - 38px); }
.n3 { left: -38px; top: calc(50% - 38px); }
.n4 { right: -38px; top: calc(50% - 38px); }
@keyframes spin { to { transform: rotate(360deg); } }

/* Strip */
.strip { background: var(--yellow-500); color: var(--green-900); }
.strip-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; padding: 28px 0; }
.strip-grid div { display: flex; flex-direction: column; }
.strip-grid strong { font-size: 1.15rem; font-weight: 800; }
.strip-grid span { font-size: .9rem; opacity: .85; }

/* Sections */
.section { padding: 100px 0; }
.section.alt { background: var(--green-50); }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 56px; }
.eyebrow {
  display: inline-block; font-size: .8rem; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--green-700); margin-bottom: 12px;
}
.eyebrow::before { content: ""; display: inline-block; width: 24px; height: 3px; background: var(--yellow-500); vertical-align: middle; margin-right: 10px; border-radius: 2px; }
.eyebrow.light { color: var(--yellow-400); }
h2 { font-size: clamp(1.8rem, 3.2vw, 2.6rem); line-height: 1.3; font-weight: 800; color: var(--green-900); margin-bottom: 18px; letter-spacing: -0.01em; }
.section-head p, .two-col p { color: var(--muted); font-size: 1.05rem; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.two-col p + p { margin-top: 16px; }

.founded {
  display: inline-flex; align-items: center; gap: 12px; margin-top: 24px;
  padding: 8px 18px 8px 8px; border-radius: 999px; background: var(--green-50); border: 1px solid var(--line);
}
.founded-label { padding: 4px 12px; border-radius: 999px; background: var(--yellow-500); color: var(--green-900); font-weight: 700; font-size: .85rem; }
.founded-date { font-weight: 700; color: var(--green-800); }
.values { display: flex; flex-direction: column; gap: 20px; }
.value { display: flex; gap: 18px; padding: 24px; border-radius: var(--radius); border: 1px solid var(--line); background: #fff; box-shadow: var(--shadow); }
.value .icon { color: var(--yellow-600); font-size: 1.4rem; }
.value h4 { color: var(--green-800); font-size: 1.1rem; margin-bottom: 4px; }
.value p { font-size: .95rem; }

/* Cards */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.card {
  background: #fff; border-radius: var(--radius); padding: 28px; border: 1px solid var(--line);
  transition: transform .25s, box-shadow .25s, border-color .25s; position: relative; overflow: hidden;
}
.card::after { content: ""; position: absolute; left: 0; top: 0; height: 4px; width: 0; background: linear-gradient(90deg, var(--green-600), var(--yellow-500)); transition: width .3s; }
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.card:hover::after { width: 100%; }
.card-icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; font-size: 1.5rem;
  background: linear-gradient(135deg, var(--green-50), #fef9c3); margin-bottom: 18px;
}
.card h3 { font-size: 1.1rem; color: var(--green-900); margin-bottom: 10px; }
.card p { font-size: .92rem; color: var(--muted); }

/* Solutions */
.sol-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.sol {
  padding: 28px; border-radius: var(--radius);
  background: linear-gradient(160deg, var(--green-800), var(--green-700)); color: #fff;
  border-bottom: 4px solid var(--yellow-500);
}
.sol h4 { font-size: 1.15rem; margin-bottom: 8px; color: var(--yellow-400); }
.sol p { color: rgba(255,255,255,.85); font-size: .95rem; }

/* Steps */
.steps { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: s; }
.steps li { background: #fff; border-radius: var(--radius); padding: 28px; border: 1px solid var(--line); position: relative; }
.steps span { font-size: 2.4rem; font-weight: 900; color: var(--yellow-500); line-height: 1; display: block; margin-bottom: 12px; }
.steps h4 { color: var(--green-900); font-size: 1.15rem; margin-bottom: 6px; }
.steps p { color: var(--muted); font-size: .92rem; }

/* Team */
.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.member { text-align: center; padding: 32px 24px; border-radius: var(--radius); border: 1px solid var(--line); box-shadow: var(--shadow); }
.avatar {
  width: 84px; height: 84px; margin: 0 auto 18px; border-radius: 50%;
  display: grid; place-items: center; font-weight: 800; color: var(--green-900);
  background: conic-gradient(var(--yellow-500), var(--green-500), var(--yellow-500));
  border: 4px solid #fff; box-shadow: 0 0 0 2px var(--green-600);
}
.member h4 { color: var(--green-800); margin-bottom: 8px; }
.member p { color: var(--muted); font-size: .92rem; }

/* Claude */
.claude { background: linear-gradient(135deg, var(--green-900), var(--green-800)); color: #fff; }
.claude h2 { color: #fff; }
.claude .two-col p { color: rgba(255,255,255,.85); }
.checks { list-style: none; display: flex; flex-direction: column; gap: 14px; }
.checks li { padding: 16px 20px 16px 52px; border-radius: 12px; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.12); position: relative; }
.checks li::before {
  content: "✓"; position: absolute; left: 18px; top: 50%; transform: translateY(-50%);
  width: 22px; height: 22px; border-radius: 50%; background: var(--yellow-500); color: var(--green-900);
  display: grid; place-items: center; font-size: .75rem; font-weight: 900;
}

/* Contact */
.contact { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: start; }
.contact > div > p { color: var(--muted); font-size: 1.05rem; }
.contact-info { list-style: none; margin-top: 28px; display: flex; flex-direction: column; gap: 12px; }
.contact-info strong { display: inline-block; min-width: 96px; color: var(--green-800); }
.contact-info a { color: var(--green-700); font-weight: 600; }
.form { display: flex; flex-direction: column; gap: 16px; padding: 36px; border-radius: var(--radius); background: var(--green-50); border: 1px solid var(--line); }
.form label { display: flex; flex-direction: column; gap: 6px; font-weight: 600; font-size: .9rem; color: var(--green-900); }
.form input, .form textarea {
  font: inherit; padding: 12px 14px; border-radius: 10px; border: 1px solid var(--line); background: #fff; font-weight: 400;
}
.form input:focus, .form textarea:focus { outline: 2px solid var(--green-600); border-color: transparent; }
.form .btn { align-self: flex-start; }

/* Footer */
.footer { background: var(--green-900); color: rgba(255,255,255,.75); padding: 40px 0; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }
.footer .brand-name { color: #fff; }
.footer .brand-logo { background: #fff; border-radius: 8px; padding: 4px; }
.copy { font-size: .85rem; }

/* Reveal */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s, transform .7s; }
.reveal.visible { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 1024px) {
  .cards, .team-grid, .steps { grid-template-columns: repeat(2, 1fr); }
  .sol-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-inner, .two-col, .contact { grid-template-columns: 1fr; }
  .hero-visual { display: none; }
}
@media (max-width: 760px) {
  .nav-links {
    display: none; position: absolute; top: 72px; left: 0; right: 0; flex-direction: column; gap: 0;
    background: #fff; border-bottom: 1px solid var(--line);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 14px 4%; border-top: 1px solid var(--line); }
  .menu-toggle { display: block; }
  .brand-name { display: none; }
  .footer .brand-name { display: inline; }
  .strip-grid, .cards, .team-grid, .steps, .sol-grid { grid-template-columns: 1fr; }
  .section { padding: 72px 0; }
  .hero { padding: 80px 0; }
}
@media (prefers-reduced-motion: reduce) {
  .orbit, .core, .node { animation: none; }
  .reveal { opacity: 1; transform: none; transition: none; }
}