:root {
  --bg: #ffffff;
  --bg-soft: #f5f7f5;
  --text: #16251f;
  --muted: #60706a;
  --line: #dce5df;
  --green: #123c32;
  --green-2: #1f5f4c;
  --orange: #e9772c;
  --orange-soft: #fff1e8;
  --card: #ffffff;
  --shadow: 0 18px 50px rgba(18, 60, 50, 0.12);
  --radius: 8px;
  --max: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", "Hiragino Sans", "Yu Gothic", sans-serif;
  line-height: 1.75;
  letter-spacing: 0;
  overflow-x: hidden;
}

img {
  display: block;
  max-width: 100%;
}

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

.container {
  width: calc(100% - 40px);
  max-width: var(--max);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px max(20px, calc((100vw - var(--max)) / 2));
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(220, 229, 223, 0.8);
  backdrop-filter: blur(16px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: max-content;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--green), var(--orange));
  border-radius: 8px;
  font-weight: 900;
}

.brand-name,
.brand-sub {
  display: block;
  line-height: 1.2;
}

.brand-name {
  font-size: 15px;
}

.brand-sub {
  color: var(--muted);
  font-size: 11px;
  font-weight: 700;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.site-nav a {
  transition: color 0.2s ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--green);
}

.nav-cta {
  padding: 9px 14px;
  color: #fff !important;
  background: var(--green);
  border-radius: 999px;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--green);
}

.section-band {
  background:
    radial-gradient(circle at 12% 18%, rgba(233, 119, 44, 0.1), transparent 28%),
    linear-gradient(180deg, #fbfdfb 0%, #eef5f1 100%);
}

.hero {
  padding: 68px 0 38px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.86fr);
  gap: 42px;
  align-items: center;
}

.hero-copy,
.hero-visual {
  min-width: 0;
}

.eyebrow,
.section-kicker {
  margin: 0 0 12px;
  color: var(--orange);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
  word-break: normal;
}

h1 {
  max-width: 760px;
  margin: 0;
  color: var(--green);
  font-size: clamp(34px, 5.3vw, 64px);
  line-height: 1.18;
  letter-spacing: 0;
}

h2 {
  margin: 0;
  color: var(--green);
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.25;
  letter-spacing: 0;
}

h3 {
  margin: 0;
  color: var(--green);
  font-size: 20px;
  line-height: 1.4;
}

.lead {
  max-width: 720px;
  margin: 24px 0 0;
  color: #32443d;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 12px 18px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-weight: 800;
  line-height: 1.3;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.button:hover {
  transform: translateY(-1px);
}

.button.primary {
  color: #fff;
  background: var(--green);
  box-shadow: 0 10px 24px rgba(18, 60, 50, 0.22);
}

.button.secondary {
  color: var(--green);
  background: #fff;
  border-color: var(--line);
}

.hero-visual {
  overflow: hidden;
  border: 1px solid rgba(220, 229, 223, 0.9);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.hero-visual img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.stat-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  margin-top: 42px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 28px rgba(18, 60, 50, 0.08);
}

.stat-strip div {
  padding: 18px 16px;
  background: rgba(255, 255, 255, 0.86);
}

.stat-strip strong,
.stat-strip span {
  display: block;
}

.stat-strip strong {
  color: var(--green);
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1.2;
}

.stat-strip span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.section {
  padding: 84px 0;
}

.section-muted {
  background: var(--bg-soft);
}

.two-column {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  gap: 48px;
}

.prose p {
  margin: 0;
  color: #334841;
  font-size: 16px;
}

.prose p + p {
  margin-top: 18px;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading.compact {
  max-width: 680px;
}

.section-heading p:not(.section-kicker) {
  margin: 14px 0 0;
  color: var(--muted);
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.topic-card,
.number-card,
.article-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
}

.topic-card {
  min-height: 270px;
  padding: 22px;
}

.card-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 30px;
  margin-bottom: 20px;
  color: var(--orange);
  background: var(--orange-soft);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 900;
}

.topic-card p,
.number-card p,
.article-card p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 14px;
}

.number-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.number-card {
  padding: 22px;
}

.number-card span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.number-card strong {
  display: block;
  margin-top: 8px;
  color: var(--green);
  font-size: clamp(26px, 3.5vw, 38px);
  line-height: 1.15;
}

.roadmap-list {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 10px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: step;
}

.roadmap-list li {
  position: relative;
  min-height: 150px;
  padding: 18px 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  counter-increment: step;
}

.roadmap-list li::before {
  content: counter(step, decimal-leading-zero);
  display: block;
  margin-bottom: 14px;
  color: var(--orange);
  font-size: 13px;
  font-weight: 900;
}

.roadmap-list span {
  display: block;
  color: var(--green);
  font-size: 14px;
  font-weight: 800;
  line-height: 1.5;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 16px;
}

.article-card {
  grid-column: span 2;
  min-height: 210px;
  padding: 22px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.article-card.featured {
  grid-column: span 4;
  background: linear-gradient(135deg, #123c32, #1f5f4c);
}

.article-card:hover {
  transform: translateY(-2px);
  border-color: rgba(233, 119, 44, 0.55);
  box-shadow: 0 14px 28px rgba(18, 60, 50, 0.1);
}

.article-card span {
  display: inline-block;
  margin-bottom: 16px;
  color: var(--orange);
  font-size: 13px;
  font-weight: 900;
}

.article-card.featured span,
.article-card.featured h3,
.article-card.featured p {
  color: #fff;
}

.article-card.featured p {
  opacity: 0.82;
}

.ai-section {
  padding-top: 0;
}

.ai-panel {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 42px;
  padding: 38px;
  color: #fff;
  background: linear-gradient(135deg, var(--green), #0f2d27);
  border-radius: var(--radius);
}

.ai-panel h2,
.ai-panel .section-kicker,
.ai-panel .prose p {
  color: #fff;
}

.ai-panel .section-kicker {
  color: #f4a66f;
}

.ai-panel .prose p {
  opacity: 0.86;
}

.final-cta {
  padding: 76px 0;
}

.final-cta-inner {
  max-width: 760px;
  text-align: center;
}

.final-cta h2 {
  margin: 0 auto;
}

.final-cta p:not(.section-kicker) {
  margin: 18px auto 26px;
  color: var(--muted);
}

.site-footer {
  padding: 26px 0;
  color: var(--muted);
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  font-size: 13px;
}

.footer-inner p {
  margin: 0;
}

@media (max-width: 980px) {
  .hero-grid,
  .two-column,
  .ai-panel {
    grid-template-columns: 1fr;
  }

  .topic-grid,
  .number-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .roadmap-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .article-card,
  .article-card.featured {
    grid-column: span 3;
  }
}

@media (max-width: 760px) {
  .container {
    width: calc(100% - 28px);
    max-width: var(--max);
  }

  .site-header {
    padding: 12px 14px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 1px);
    right: 14px;
    left: 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 10px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }

  .site-nav a {
    padding: 12px;
  }

  .nav-cta {
    text-align: center;
  }

  .hero {
    padding-top: 42px;
  }

  .hero .container,
  .hero-copy,
  .hero-visual,
  .stat-strip {
    width: 86vw;
    max-width: 300px;
  }

  h1 {
    font-size: 29px;
    word-break: break-all;
  }

  .lead {
    font-size: 16px;
    word-break: break-all;
  }

  .button {
    width: 100%;
  }

  .hero-visual img {
    aspect-ratio: 16 / 11;
  }

  .stat-strip,
  .topic-grid,
  .number-grid,
  .article-grid {
    grid-template-columns: 1fr;
  }

  .article-card,
  .article-card.featured {
    grid-column: auto;
  }

  .section {
    padding: 62px 0;
  }

  .roadmap-list {
    grid-template-columns: 1fr;
  }

  .roadmap-list li {
    min-height: auto;
  }

  .ai-panel {
    padding: 28px 22px;
  }

  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}