:root {
  --ink: #101713;
  --ink-soft: #5c665f;
  --paper: #f5f6f2;
  --white: #ffffff;
  --green: #087044;
  --green-dark: #064d32;
  --mint: #94e5b3;
  --line: rgba(16, 23, 19, 0.14);
  --shadow: 0 24px 64px rgba(14, 35, 25, 0.12);
  --radius: 24px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }

button, a { -webkit-tap-highlight-color: transparent; }

.shell { width: min(1180px, calc(100% - 48px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(16, 23, 19, 0.08);
  background: rgba(245, 246, 242, 0.9);
  backdrop-filter: blur(18px);
}

.header-inner {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand { display: flex; align-items: center; gap: 13px; font-weight: 760; letter-spacing: -0.02em; }
.brand-mark { font-size: 30px; color: var(--green); letter-spacing: -0.08em; line-height: 1; }
.brand-company { font-size: 14px; color: var(--ink-soft); font-weight: 600; }

.nav { display: flex; align-items: center; gap: 30px; font-size: 15px; font-weight: 650; }
.nav a { position: relative; padding: 8px 0; }
.nav a::after { content: ""; position: absolute; left: 0; right: 100%; bottom: 3px; height: 2px; background: var(--green); transition: right .2s ease; }
.nav a:hover::after, .nav a:focus-visible::after, .nav a.active::after { right: 0; }
.nav-cta { border: 1px solid var(--ink); border-radius: 999px; padding: 8px 16px !important; }
.nav-cta::after { display: none; }

.hero { padding: 42px 0 24px; }
.hero-grid {
  min-height: 620px;
  display: grid;
  grid-template-columns: 1.12fr .88fr;
  overflow: hidden;
  border-radius: 34px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.hero-copy { padding: clamp(48px, 7vw, 92px); display: flex; flex-direction: column; justify-content: space-between; }
.eyebrow { margin: 0 0 22px; color: var(--green); font-size: 13px; font-weight: 760; letter-spacing: .16em; text-transform: uppercase; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 28px; max-width: 760px; font-size: clamp(46px, 6.3vw, 82px); line-height: 1.03; letter-spacing: -0.065em; font-weight: 800; }
.hero-lead { max-width: 610px; color: var(--ink-soft); font-size: clamp(18px, 2vw, 22px); line-height: 1.7; }
.hero-meta { margin-top: 54px; display: flex; gap: 34px; flex-wrap: wrap; color: var(--ink-soft); font-size: 14px; }
.hero-meta strong { display: block; color: var(--ink); font-size: 20px; }

.hero-panel {
  position: relative;
  min-height: 620px;
  padding: 52px;
  color: var(--white);
  background:
    radial-gradient(circle at 82% 18%, rgba(148, 229, 179, .32), transparent 28%),
    linear-gradient(145deg, #0c1713 0%, #07100d 78%);
  isolation: isolate;
}

.hero-panel::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: .3;
  background-image: linear-gradient(rgba(255,255,255,.12) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.12) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to bottom left, #000, transparent 76%);
}

.product-seal {
  width: 132px;
  height: 132px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255,255,255,.28);
  border-radius: 50%;
  color: var(--mint);
  font-size: 46px;
  font-weight: 800;
  letter-spacing: -0.08em;
}

.panel-content { position: absolute; left: 52px; right: 52px; bottom: 54px; }
.panel-kicker { color: var(--mint); font-size: 13px; letter-spacing: .15em; }
.panel-title { margin: 14px 0 18px; max-width: 390px; font-size: clamp(34px, 4vw, 56px); line-height: 1.14; letter-spacing: -0.05em; }
.panel-copy { max-width: 430px; color: rgba(255,255,255,.68); }
.panel-link { margin-top: 28px; display: inline-flex; align-items: center; gap: 12px; color: var(--mint); font-weight: 700; }

.statement { padding: 120px 0; display: grid; grid-template-columns: .75fr 1.25fr; gap: 90px; align-items: start; }
.section-index { color: var(--green); font-size: 13px; font-weight: 800; letter-spacing: .16em; }
.statement h2 { margin-bottom: 24px; font-size: clamp(34px, 4vw, 58px); line-height: 1.16; letter-spacing: -0.045em; }
.statement p { max-width: 750px; color: var(--ink-soft); font-size: 19px; }

.product-section { padding: 0 0 120px; }
.section-heading { margin-bottom: 34px; display: flex; align-items: end; justify-content: space-between; gap: 30px; }
.section-heading h2 { margin: 8px 0 0; font-size: clamp(38px, 4.6vw, 64px); line-height: 1.05; letter-spacing: -0.055em; }
.section-heading p { max-width: 440px; margin: 0; color: var(--ink-soft); }

.product-card { display: grid; grid-template-columns: .9fr 1.1fr; overflow: hidden; border-radius: 30px; background: var(--white); box-shadow: var(--shadow); }
.product-visual { min-height: 470px; padding: 48px; color: var(--white); background: linear-gradient(155deg, #07623c, #0a3324); }
.product-word { font-size: clamp(92px, 13vw, 168px); font-weight: 820; letter-spacing: -0.1em; line-height: .85; }
.product-visual blockquote { margin: 170px 0 0; max-width: 360px; font-size: 24px; line-height: 1.45; }
.product-details { padding: clamp(42px, 6vw, 72px); }
.product-details h3 { margin-bottom: 18px; font-size: 34px; letter-spacing: -0.03em; }
.product-details > p { color: var(--ink-soft); font-size: 18px; }
.feature-list { margin-top: 44px; border-top: 1px solid var(--line); }
.feature { padding: 22px 0; display: grid; grid-template-columns: 42px 1fr; gap: 14px; border-bottom: 1px solid var(--line); }
.feature-num { color: var(--green); font-weight: 800; }
.feature strong { display: block; margin-bottom: 4px; }
.feature span { color: var(--ink-soft); font-size: 15px; }

.company { padding: 110px 0; color: var(--white); background: var(--ink); }
.company-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 90px; }
.company h2 { margin: 8px 0 22px; font-size: clamp(38px, 5vw, 66px); letter-spacing: -0.05em; }
.company-intro { max-width: 450px; color: rgba(255,255,255,.66); font-size: 18px; }
.facts { border-top: 1px solid rgba(255,255,255,.18); }
.fact { padding: 22px 0; display: grid; grid-template-columns: 160px 1fr; gap: 24px; border-bottom: 1px solid rgba(255,255,255,.18); }
.fact dt { color: rgba(255,255,255,.5); }
.fact dd { margin: 0; font-weight: 620; }

.contact-band { padding: 98px 0; background: var(--mint); }
.contact-grid { display: grid; grid-template-columns: 1fr auto; gap: 40px; align-items: center; }
.contact-grid h2 { margin-bottom: 12px; font-size: clamp(38px, 5vw, 64px); line-height: 1.1; letter-spacing: -0.05em; }
.contact-grid p { margin: 0; color: rgba(16,23,19,.68); }
.button { display: inline-flex; align-items: center; justify-content: center; gap: 12px; min-height: 52px; padding: 0 24px; border-radius: 999px; background: var(--ink); color: var(--white); font-weight: 720; }
.button:hover { background: var(--green-dark); }

.site-footer { padding: 42px 0; background: var(--white); }
.footer-grid { display: grid; grid-template-columns: 1fr auto; gap: 34px; align-items: end; }
.footer-name { font-weight: 760; }
.footer-en { color: var(--ink-soft); font-size: 13px; }
.footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 24px; font-size: 14px; }
.copyright { margin-top: 28px; padding-top: 20px; border-top: 1px solid var(--line); color: var(--ink-soft); font-size: 13px; }

.page-hero { padding: 96px 0 68px; border-bottom: 1px solid var(--line); }
.page-hero h1 { max-width: 900px; margin-bottom: 20px; }
.page-hero p { max-width: 760px; color: var(--ink-soft); font-size: 18px; }
.document { padding: 72px 0 110px; }
.document-grid { display: grid; grid-template-columns: 260px minmax(0, 760px); gap: 72px; align-items: start; }
.document-aside { position: sticky; top: 108px; color: var(--ink-soft); font-size: 14px; }
.document-aside strong { display: block; margin-bottom: 12px; color: var(--ink); }
.legal h2 { margin: 52px 0 14px; font-size: 27px; letter-spacing: -0.025em; }
.legal h2:first-child { margin-top: 0; }
.legal h3 { margin: 30px 0 10px; font-size: 19px; }
.legal p, .legal li { color: #414a44; }
.legal ul { padding-left: 1.25em; }
.legal-note { padding: 18px 20px; border-left: 3px solid var(--green); background: rgba(8,112,68,.07); }

.contact-page { padding: 72px 0 110px; }
.contact-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.contact-card { min-height: 230px; padding: 34px; border-radius: var(--radius); background: var(--white); box-shadow: 0 14px 40px rgba(14,35,25,.07); }
.contact-card small { color: var(--green); font-weight: 760; letter-spacing: .12em; }
.contact-card h2 { margin: 26px 0 12px; font-size: 27px; }
.contact-card p { color: var(--ink-soft); }
.contact-card a { color: var(--green); font-weight: 700; }

@media (max-width: 860px) {
  .shell { width: min(100% - 28px, 720px); }
  .brand-company { display: none; }
  .nav { gap: 18px; }
  .nav a:not(.nav-cta) { display: none; }
  .hero { padding-top: 20px; }
  .hero-grid, .product-card, .company-grid { grid-template-columns: 1fr; }
  .hero-copy { min-height: 520px; }
  .hero-panel { min-height: 500px; }
  .statement { padding: 84px 0; grid-template-columns: 1fr; gap: 24px; }
  .section-heading { display: block; }
  .section-heading p { margin-top: 20px; }
  .product-visual { min-height: 400px; }
  .product-visual blockquote { margin-top: 120px; }
  .company-grid { gap: 48px; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-links { justify-content: flex-start; }
  .document-grid { grid-template-columns: 1fr; gap: 32px; }
  .document-aside { position: static; }
  .contact-cards { grid-template-columns: 1fr; }
}

@media (max-width: 520px) {
  .header-inner { min-height: 68px; }
  .brand-mark { font-size: 26px; }
  .nav-cta { padding: 7px 13px !important; font-size: 14px; }
  .hero-grid { border-radius: 24px; }
  .hero-copy { min-height: 470px; padding: 38px 28px; }
  h1 { font-size: 43px; }
  .hero-meta { gap: 20px; margin-top: 32px; }
  .hero-panel { min-height: 460px; padding: 32px 28px; }
  .panel-content { left: 28px; right: 28px; bottom: 34px; }
  .product-visual, .product-details { padding: 34px 28px; }
  .product-word { font-size: 92px; }
  .product-visual blockquote { margin-top: 110px; }
  .fact { grid-template-columns: 1fr; gap: 4px; }
  .page-hero { padding: 64px 0 46px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; }
}