:root {
  --bg: #f4f6f2;
  --surface: #ffffff;
  --surface-alt: #e8eee7;
  --text: #173126;
  --muted: #56685f;
  --line: rgba(23, 49, 38, 0.12);
  --primary: #1f5a3e;
  --primary-dark: #163f2c;
  --accent: #98b6a0;
  --shadow: 0 20px 60px rgba(12, 34, 25, 0.09);
  --radius-lg: 28px;
  --radius-md: 20px;
  --radius-sm: 14px;
  --container: 1180px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans JP", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(152, 182, 160, 0.18), transparent 32%),
    linear-gradient(180deg, #f9fbf8 0%, var(--bg) 100%);
  line-height: 1.7;
}

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

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

button,
input,
textarea {
  font: inherit;
}

.skip-link,
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link:focus {
  width: auto;
  height: auto;
  margin: 1rem;
  padding: 0.75rem 1rem;
  clip: auto;
  background: var(--primary-dark);
  color: #fff;
  z-index: 1000;
}

.container {
  width: min(calc(100% - 3rem), var(--container));
  margin: 0 auto;
}

.section {
  padding: 6.5rem 0;
}

.muted-section {
  background: rgba(255, 255, 255, 0.55);
}

.accent-section {
  padding: 4rem 0;
}

.eyebrow {
  margin: 0 0 1rem;
  color: var(--primary);
  font-family: "Montserrat", sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 3rem;
}

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

.section-heading h2,
.hero h1 {
  margin: 0 0 1.25rem;
  font-size: clamp(2rem, 4vw, 3.8rem);
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.section-heading p,
.hero-lead,
.hero-points,
.contact-copy p,
.site-footer p {
  color: var(--muted);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(18px);
  background: rgba(249, 251, 248, 0.84);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.site-header.is-scrolled {
  border-color: var(--line);
  box-shadow: 0 14px 40px rgba(18, 33, 25, 0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 1rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), #7aa689);
  color: #fff;
  font-family: "Montserrat", sans-serif;
  font-weight: 700;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.brand-text strong {
  font-size: 1rem;
  letter-spacing: 0.02em;
}

.brand-text small {
  color: var(--muted);
  font-size: 0.72rem;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 1.4rem;
}

.site-nav a {
  font-size: 0.95rem;
  color: var(--muted);
}

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

.nav-cta {
  padding: 0.8rem 1rem;
  border-radius: 999px;
  background: var(--primary-dark);
  color: #fff !important;
}

.menu-toggle {
  display: none;
  padding: 0;
  border: 0;
  background: transparent;
}

.menu-toggle span {
  display: block;
  width: 1.5rem;
  height: 2px;
  margin: 0.3rem 0;
  background: var(--text);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.hero {
  position: relative;
  padding-top: 5rem;
  color: var(--text);
  background:
    linear-gradient(90deg, rgba(255, 252, 245, 0.96) 0%, rgba(255, 252, 245, 0.9) 32%, rgba(255, 252, 245, 0.54) 50%, rgba(255, 252, 245, 0.08) 70%),
    linear-gradient(180deg, rgba(244, 255, 239, 0.24), rgba(241, 249, 236, 0.12)),
    url("images/top_forest.png") center center / cover no-repeat,
    linear-gradient(135deg, #f6f4eb 0%, #eef6df 48%, #e0f0d3 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at left 18%, top 12%, rgba(255, 255, 255, 0.95), transparent 24%),
    radial-gradient(circle at left 24%, top 54%, rgba(233, 246, 214, 0.68), transparent 22%),
    radial-gradient(circle at right 14%, bottom 18%, rgba(234, 248, 221, 0.28), transparent 18%);
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 1;
}

.hero .eyebrow {
  color: #355f30;
}

.hero h1,
.hero-lead,
.hero-points,
.hero-points li {
  color: #1d261f;
}

.hero .button-secondary {
  background: rgba(255, 255, 255, 0.88);
  border-color: rgba(53, 95, 48, 0.24);
  color: var(--primary);
}

.hero .button-secondary:hover {
  background: #fff;
}

.hero-copy .hero-lead,
.hero-copy .hero-points {
  color: rgba(29, 38, 31, 0.92);
}

.hero-grid,
.split-grid,
.field-layout,
.contact-panel,
.callout {
  display: grid;
  gap: 2rem;
}

.hero-grid {
  min-height: 640px;
  align-items: center;
}

.hero-copy {
  max-width: 760px;
  padding: clamp(1.75rem, 3vw, 3rem);
  border: 1px solid rgba(122, 170, 103, 0.16);
  border-radius: 32px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.9), rgba(255, 252, 247, 0.78));
  box-shadow: 0 24px 70px rgba(102, 127, 86, 0.14);
  backdrop-filter: blur(14px);
}

.hero h1 {
  font-size: clamp(2.35rem, 4.5vw, 3.55rem);
}

.hero-accent {
  color: #3e9937;
  white-space: nowrap;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin: 2rem 0;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3.3rem;
  padding: 0.85rem 1.4rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

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

.button-primary {
  background: linear-gradient(135deg, #4fab45, #2f8f32);
  color: #fff;
  box-shadow: 0 14px 30px rgba(79, 171, 69, 0.22);
}

.button-secondary {
  background: rgba(255, 255, 255, 0.75);
  border-color: var(--line);
}

.hero-points {
  display: grid;
  gap: 0.75rem;
  margin: 1.5rem 0 0;
  padding: 0;
  list-style: none;
}

.hero-points li {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.hero-points li::before {
  content: "";
  width: 0.7rem;
  height: 0.7rem;
  border-radius: 50%;
  background: linear-gradient(135deg, #6eb560, #b6db8b);
  flex: 0 0 auto;
}

.media-placeholder {
  display: grid;
  place-items: center;
  text-align: center;
  border: 1px dashed rgba(255, 255, 255, 0.45);
  color: rgba(255, 255, 255, 0.9);
}

.issue-grid,
.service-grid,
.feature-list,
.academia-grid,
.flow-grid {
  display: grid;
  gap: 1.4rem;
}

.issue-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.service-grid,
.academia-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.issue-card,
.service-card,
.academia-card,
.flow-step,
.feature-item,
.future-card,
.contact-card,
.callout,
.media-placeholder {
  background: var(--surface);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.issue-card,
.service-card,
.academia-card,
.feature-item,
.future-card,
.flow-step {
  padding: 1.7rem;
  border-radius: var(--radius-md);
}

.issue-card h3 {
  line-height: 1.45;
  text-wrap: balance;
}

.issue-card p {
  margin: 0;
  line-height: 1.9;
  text-wrap: pretty;
}

.recommended-section {
  position: relative;
}

.recommended-section .section-heading {
  margin-bottom: 1.5rem;
}

.recommended-text {
  max-width: 860px;
  margin: 0;
  color: var(--text);
  font-size: clamp(1.12rem, 2vw, 1.35rem);
  font-weight: 700;
  line-height: 2.1;
  text-wrap: pretty;
}

.service-card {
  min-height: 100%;
  display: grid;
  align-content: start;
}

.service-card p {
  margin-bottom: 1rem;
}

.service-detail-list {
  display: grid;
  gap: 0.55rem;
  margin: 0;
  padding: 0;
  list-style: none;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.65;
}

.service-detail-list li {
  position: relative;
  padding-left: 1.15rem;
}

.service-detail-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background: #6eb560;
}

.service-figure {
  display: grid;
  place-items: center;
  min-height: 150px;
  margin-bottom: 1.2rem;
  border-radius: 18px;
  border: 1px dashed rgba(53, 95, 48, 0.28);
  background:
    radial-gradient(circle at top left, rgba(212, 233, 188, 0.8), transparent 38%),
    linear-gradient(180deg, rgba(248, 251, 243, 0.98), rgba(237, 245, 228, 0.92));
  color: rgba(53, 95, 48, 0.72);
  font-family: "Montserrat", sans-serif;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.service-figure-learning {
  background:
    radial-gradient(circle at top left, rgba(214, 236, 196, 0.82), transparent 38%),
    linear-gradient(180deg, rgba(249, 251, 244, 0.98), rgba(238, 246, 229, 0.94));
}

.service-figure-field {
  background:
    radial-gradient(circle at top left, rgba(201, 231, 210, 0.84), transparent 38%),
    linear-gradient(180deg, rgba(247, 251, 246, 0.98), rgba(230, 242, 233, 0.94));
}

.service-figure-report {
  background:
    radial-gradient(circle at top left, rgba(219, 233, 198, 0.82), transparent 38%),
    linear-gradient(180deg, rgba(250, 251, 245, 0.98), rgba(238, 244, 227, 0.94));
}

.service-figure img {
  width: 100%;
  height: 100%;
  min-height: 150px;
  border-radius: 18px;
  object-fit: cover;
  display: block;
}

.service-note {
  max-width: 880px;
  margin: 1.5rem auto 0;
  color: var(--muted);
  line-height: 1.85;
  text-align: center;
}

.service-number,
.flow-step span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  margin-bottom: 1.1rem;
  background: var(--surface-alt);
  color: var(--primary);
  font-family: "Montserrat", sans-serif;
  font-weight: 700;
}

.split-grid {
  grid-template-columns: minmax(0, 0.7fr) minmax(0, 1fr);
  align-items: start;
}

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

.distinctive-section {
  overflow: hidden;
  background: #fff;
}

.distinctive-layout {
  display: grid;
  grid-template-columns: minmax(500px, 0.95fr) minmax(480px, 1.05fr);
  gap: clamp(2rem, 3vw, 3rem);
  align-items: center;
}

.distinctive-copy h2 {
  margin: 0 0 clamp(3rem, 6vw, 5rem);
  color: #000;
  font-size: clamp(2rem, 4vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.03em;
}

.distinctive-copy h2 span {
  white-space: nowrap;
}

.distinctive-points {
  display: grid;
  gap: 1.45rem;
  color: #000;
}

.distinctive-points article {
  display: grid;
  gap: 0.12rem;
}

.distinctive-points h3 {
  position: relative;
  margin: 0;
  padding-left: 1rem;
  color: #00b050;
  font-size: clamp(1rem, 1.28vw, 1.2rem);
  font-weight: 700;
  line-height: 1.45;
}

.distinctive-points h3::before {
  content: "・";
  position: absolute;
  left: 0;
  color: #000;
}

.distinctive-points p {
  margin: 0;
  color: #000;
  font-size: clamp(0.95rem, 1.1vw, 1.05rem);
  line-height: 1.7;
}

.distinctive-collage {
  position: relative;
  min-height: 640px;
}

.collage-image {
  position: absolute;
  display: block;
  object-fit: cover;
  box-shadow: none;
}

.collage-field {
  top: 0;
  left: 2rem;
  width: min(72%, 520px);
  height: 310px;
}

.collage-lunch {
  top: 164px;
  right: 0;
  width: min(46%, 340px);
  height: 190px;
  object-position: center;
}

.collage-report {
  left: 0;
  bottom: 0;
  width: min(41%, 288px);
  height: 330px;
  object-fit: contain;
  background: #fff;
}

.collage-learning {
  right: 0;
  bottom: 16px;
  width: min(62%, 430px);
  height: 280px;
  object-fit: contain;
  background: #fff;
}

.callout {
  grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.8fr);
  align-items: center;
  padding: 2rem;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(135deg, rgba(22, 63, 44, 0.96), rgba(44, 97, 70, 0.92)),
    var(--surface);
  color: #fff;
}

.callout p,
.callout-note {
  color: rgba(255, 255, 255, 0.84);
}

.callout-actions {
  display: grid;
  gap: 1rem;
  justify-items: start;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 0.95rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
  font-weight: 700;
}

.field-layout {
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  align-items: start;
}

.media-placeholder {
  min-height: 430px;
  padding: 2rem;
  border-radius: var(--radius-lg);
  background:
    linear-gradient(180deg, rgba(39, 85, 61, 0.78), rgba(39, 85, 61, 0.55)),
    linear-gradient(135deg, #b7c7b4, #6f8a74);
}

.media-placeholder strong,
.media-placeholder span {
  color: #fff;
}

.field-photo {
  width: 100%;
  min-height: 430px;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
}

.check-list {
  display: grid;
  gap: 1rem;
  margin-bottom: 1.4rem;
}

.check-list p {
  position: relative;
  margin: 0;
  padding-left: 1.7rem;
}

.check-list p::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7rem;
  width: 0.75rem;
  height: 0.75rem;
  border-radius: 50%;
  background: var(--primary);
}

.academia-card h3,
.issue-card h3,
.service-card h3,
.feature-item h3,
.flow-step h3,
.future-card h3 {
  margin-top: 0;
  margin-bottom: 0.75rem;
}

.flow-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.flow-grid-three {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.flow-step p {
  margin: 0;
  color: var(--muted);
  line-height: 1.85;
}

.flow-cta {
  display: flex;
  justify-content: center;
  margin-top: 2rem;
}

.contact-panel {
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.95fr);
  padding: 2.2rem;
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at top left, rgba(228, 242, 212, 0.65), transparent 30%),
    linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(251, 252, 245, 0.98));
  border: 1px solid rgba(97, 135, 82, 0.12);
  box-shadow: var(--shadow);
}

.contact-card {
  display: grid;
  gap: 1rem;
  align-content: start;
  padding: 1.8rem;
  border-radius: var(--radius-md);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.96), rgba(247, 250, 242, 0.96));
}

.contact-card-title {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 700;
}

.contact-card-note {
  margin: 0;
  color: var(--muted);
}

.contact-button {
  justify-self: start;
}

.form-note {
  margin: 0;
  color: var(--muted);
  font-size: 0.9rem;
}

.site-footer {
  padding: 2rem 0 3rem;
}

.footer-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.3rem;
  color: var(--muted);
}

@media (max-width: 1080px) {
  .issue-grid,
  .service-grid,
  .academia-grid,
  .flow-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-grid,
  .split-grid,
  .distinctive-layout,
  .field-layout,
  .contact-panel,
  .callout {
    grid-template-columns: 1fr;
  }

  .distinctive-copy h2 {
    margin-bottom: 3rem;
  }

  .distinctive-collage {
    min-height: 600px;
  }

  .collage-field {
    left: 0;
    width: 66%;
  }

  .collage-report {
    width: 38%;
  }

  .collage-learning {
    width: 58%;
  }
}

@media (max-width: 820px) {
  .container {
    width: min(calc(100% - 2rem), var(--container));
  }

  .section {
    padding: 5rem 0;
  }

  .menu-toggle {
    display: inline-block;
    z-index: 120;
  }

  .menu-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .menu-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .site-nav {
    position: fixed;
    inset: 5.2rem 1rem auto 1rem;
    display: grid;
    gap: 0.4rem;
    padding: 1rem;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-10px);
    transition: opacity 0.2s ease, transform 0.2s ease;
  }

  .site-nav.is-open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .site-nav a {
    padding: 0.85rem 0.8rem;
    border-radius: 14px;
  }

  .site-nav a:hover,
  .site-nav a.is-active {
    background: var(--surface-alt);
  }

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

  .feature-list,
  .issue-grid,
  .service-grid,
  .academia-grid,
  .flow-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    min-height: 520px;
  }

  .distinctive-collage {
    min-height: 760px;
  }

  .collage-image {
    position: relative;
    inset: auto;
    width: 100%;
  }

  .collage-field {
    height: 260px;
  }

  .collage-lunch {
    height: 190px;
    margin-top: -2rem;
    margin-left: auto;
    width: 74%;
  }

  .collage-report,
  .collage-learning {
    margin-top: 1.2rem;
    min-height: 280px;
  }
}

@media (max-width: 560px) {
  .header-inner {
    padding: 0.8rem 0;
  }

  .brand-text small {
    display: none;
  }

  .hero {
    padding-top: 3rem;
  }

  .hero-copy {
    padding: 1.4rem;
    border-radius: 24px;
  }

  .hero-actions,
  .callout-actions {
    grid-template-columns: 1fr;
  }

  .button {
    width: 100%;
  }

  .contact-panel,
  .contact-card,
  .callout {
    padding: 1.3rem;
  }

  .distinctive-copy h2 {
    font-size: clamp(2rem, 4vw, 3.8rem);
  }

  .distinctive-collage {
    min-height: 0;
  }

  .collage-lunch {
    width: 86%;
  }

}