:root {
  --green: #2e7d52;
  --green-2: #66bb6a;
  --deep: #174c32;
  --leaf: #eaf6e7;
  --cream: #f7f6f1;
  --yellow: #ffd166;
  --orange: #ff8a65;
  --blue: #4a90e2;
  --ink: #2b2b2b;
  --muted: #6d756f;
  --line: #dfe7dc;
  --white: #fff;
  --shadow: 0 18px 45px rgba(46, 125, 82, 0.14);
  font-family: "Nunito", "Noto Sans JP", "Yu Gothic", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--white);
  line-height: 1.75;
  letter-spacing: 0;
  overflow-x: hidden;
}

img,
svg {
  display: block;
}

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

button,
input,
select,
textarea {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 82px;
  padding: 14px clamp(20px, 5vw, 72px);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(223, 231, 220, 0.7);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  min-width: 232px;
}

.brand-logo {
  display: block;
  width: 232px;
  height: auto;
  object-fit: contain;
}

.site-footer .brand {
  min-width: 250px;
}

.site-footer .brand-logo {
  width: 250px;
  padding: 8px 10px;
  background: #fff;
  border-radius: 10px;
}

.brand-mark {
  width: 42px;
  height: 50px;
  flex: 0 0 auto;
}

.brand-mark.large {
  width: 96px;
  height: 116px;
  opacity: 0.95;
}

.brand-mark svg {
  width: 100%;
  height: 100%;
}

.brand-mark .leaf,
.brand-mark .stem,
.brand-mark .shine {
  fill: none;
  stroke: var(--green-2);
  stroke-width: 4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.brand-mark .cap {
  fill: var(--green-2);
}

.brand-mark .nut {
  fill: var(--green);
}

.brand-mark .shine {
  stroke: #fff;
  stroke-width: 3;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2vw, 34px);
  color: #25352c;
  font-size: 14px;
  font-weight: 800;
}

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

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

.site-nav a.is-current:not(.nav-cta) {
  color: var(--green);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 22px;
  color: #fff !important;
  background: var(--green);
  border-radius: 14px;
  box-shadow: 0 10px 24px rgba(46, 125, 82, 0.22);
}

.nav-cta svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.menu-button {
  display: none;
  width: 46px;
  height: 46px;
  place-items: center;
  padding: 10px;
  background: var(--green);
  border: 0;
  border-radius: 12px;
}

.menu-button span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 4px auto;
  background: #fff;
  border-radius: 2px;
}

.section-pad {
  padding: clamp(64px, 8vw, 112px) clamp(20px, 5vw, 72px);
}

.page-hero {
  min-height: 300px;
  display: grid;
  align-content: center;
  background:
    radial-gradient(circle at 88% 26%, rgba(255, 209, 102, 0.16), transparent 20%),
    linear-gradient(110deg, #fff 0%, #fff 54%, #fbfaf4 54%, #fff 100%);
}

.page-hero h1 {
  max-width: 900px;
  margin: 0;
  color: var(--green);
  font-size: clamp(40px, 5vw, 72px);
  line-height: 1.22;
  font-weight: 900;
  line-break: strict;
  overflow-wrap: anywhere;
}

.page-hero p:not(.section-en) {
  max-width: 760px;
  margin: 22px 0 0;
  color: #38463d;
  font-size: clamp(16px, 1.4vw, 18px);
  font-weight: 700;
  overflow-wrap: anywhere;
}

.page-section {
  margin-top: 0;
}

.page-block {
  margin-bottom: clamp(64px, 8vw, 112px);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 1.08fr);
  align-items: center;
  gap: clamp(36px, 5vw, 76px);
  min-height: 760px;
  background:
    radial-gradient(circle at 72% 22%, rgba(255, 209, 102, 0.18), transparent 24%),
    linear-gradient(110deg, #fff 0%, #fff 54%, #fbfaf4 54%, #fff 100%);
  overflow: hidden;
}

.hero h1 {
  margin: 0;
  color: var(--green);
  font-size: clamp(44px, 6vw, 82px);
  line-height: 1.26;
  font-weight: 900;
  line-break: strict;
  overflow-wrap: anywhere;
}

.hero p {
  max-width: 570px;
  margin: 30px 0 0;
  color: #38463d;
  font-size: clamp(16px, 1.55vw, 19px);
  font-weight: 600;
  overflow-wrap: anywhere;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 40px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  min-width: 156px;
  padding: 0 28px;
  border-radius: 14px;
  font-size: 15px;
  font-weight: 900;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  color: #fff;
  background: linear-gradient(135deg, var(--green), #16814d);
  box-shadow: 0 14px 26px rgba(46, 125, 82, 0.24);
}

.button.secondary {
  color: var(--green);
  background: #fff;
  border: 2px solid var(--green);
}

.button.compact {
  min-width: 150px;
  min-height: 46px;
  margin-top: 20px;
}

.hero-visual {
  position: relative;
  min-height: 520px;
}

.hero-visual::before {
  position: absolute;
  inset: 48px 0 30px 72px;
  content: "";
  background: radial-gradient(circle at 50% 50%, #fff 0%, #fff 62%, rgba(234, 246, 231, 0.9) 100%);
  border-radius: 48% 52% 46% 54%;
}

.leaf-orbit::before,
.leaf-orbit::after {
  position: absolute;
  content: "";
  width: 18px;
  height: 34px;
  background: var(--green-2);
  border-radius: 90% 0 90% 0;
  opacity: 0.7;
  transform: rotate(32deg);
}

.leaf-orbit::before {
  right: 58px;
  bottom: 90px;
}

.leaf-orbit::after {
  left: 82px;
  top: 70px;
}

.hero-box {
  position: absolute;
  right: 48px;
  top: 54px;
  width: min(64%, 510px);
  aspect-ratio: 1 / 1;
  object-fit: contain;
  filter: drop-shadow(0 26px 34px rgba(34, 70, 42, 0.18));
}

.hero-piece {
  position: absolute;
  object-fit: contain;
  border-radius: 18px;
  filter: drop-shadow(0 20px 26px rgba(34, 70, 42, 0.14));
}

.hero-piece-a {
  left: 60px;
  bottom: 46px;
  width: 42%;
}

.hero-piece-b {
  right: 0;
  bottom: 42px;
  width: 34%;
}

.section-en {
  margin: 0 0 8px;
  color: var(--green);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

h2 {
  margin: 0;
  color: #17241c;
  font-size: clamp(28px, 3.2vw, 42px);
  line-height: 1.35;
  font-weight: 900;
  line-break: strict;
  overflow-wrap: anywhere;
  word-break: break-all;
}

.play-learn {
  margin: 0 clamp(16px, 4vw, 56px);
  padding: clamp(44px, 5vw, 66px) clamp(22px, 5vw, 76px);
  text-align: center;
  background: linear-gradient(105deg, #fbfaf5, var(--cream));
  border-radius: 20px;
  box-shadow: inset 0 0 0 1px rgba(223, 231, 220, 0.8);
}

.feature-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 34px;
  margin-top: 46px;
  text-align: left;
}

.feature-item,
.stem-list article {
  display: flex;
  align-items: flex-start;
  gap: 20px;
}

.icon-circle {
  display: grid;
  place-items: center;
  width: 74px;
  height: 74px;
  flex: 0 0 auto;
  color: var(--green);
  background: rgba(234, 246, 231, 0.94);
  border: 8px solid #fff;
  border-radius: 50%;
  box-shadow: 0 10px 24px rgba(46, 125, 82, 0.1);
}

.icon-circle.small {
  width: 66px;
  height: 66px;
}

.icon-circle svg {
  width: 32px;
  height: 32px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-item h3,
.stem-list h3,
.product-card h3 {
  margin: 0 0 6px;
  color: var(--green);
  font-size: 18px;
  line-height: 1.45;
  font-weight: 900;
}

.product-title-ja,
.product-title-en {
  display: block;
}

.product-title-en {
  margin-top: 4px;
  color: #5d685f;
  font-size: 0.78em;
  font-weight: 750;
  line-height: 1.35;
}

.feature-item p,
.stem-list p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

.products {
  text-align: center;
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  max-width: 1180px;
  margin: 42px auto 22px;
}

.product-card {
  overflow: hidden;
  text-align: left;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 16px 38px rgba(46, 125, 82, 0.08);
}

.product-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: contain;
  padding: 18px;
  background: #fff;
}

.product-body {
  padding: 22px 24px 26px;
  border-top: 1px solid var(--line);
}

.product-body p {
  margin: 0 0 14px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  overflow-wrap: anywhere;
}

.product-body .meta {
  color: #5d685f;
  font-size: 13px;
}

.product-body a,
.text-link {
  display: inline-flex;
  align-items: center;
  color: var(--green);
  font-size: 14px;
  font-weight: 900;
  border-bottom: 2px solid rgba(46, 125, 82, 0.25);
}

.brand-strip {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  padding: 18px clamp(16px, 4vw, 56px);
  background: #fff;
  border-block: 1px solid var(--line);
}

.brand-strip span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 6px 14px;
  color: var(--green);
  background: #f5faf2;
  border: 1px solid rgba(46, 125, 82, 0.15);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 900;
}

.catalog-head {
  max-width: 1180px;
  margin: 0 auto;
  text-align: left;
}

.catalog-head > p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.catalog-grid {
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  align-items: stretch;
}

.catalog-card {
  display: flex;
  flex-direction: column;
}

.product-image-link {
  display: block;
}

.product-brand {
  margin-bottom: 8px !important;
  color: var(--accent) !important;
  font-size: 12px !important;
  font-weight: 900 !important;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-section + .brand-section {
  padding-top: 18px;
}

.related-grid {
  margin-top: 24px;
}

.note {
  margin: 0 auto;
  color: var(--muted);
  font-size: 13px;
}

.stem {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(36px, 6vw, 78px);
  margin: 0 clamp(16px, 4vw, 56px);
  background: linear-gradient(100deg, #fffdf8, var(--cream));
  border-radius: 20px;
  box-shadow: inset 0 0 0 1px rgba(223, 231, 220, 0.75);
}

.stem-explain,
.stem-why,
.stem-variation {
  display: grid;
  gap: clamp(32px, 5vw, 70px);
  align-items: center;
}

.stem-explain {
  grid-template-columns: minmax(0, 0.9fr) minmax(340px, 1.1fr);
}

.stem-explain-copy p:not(.section-en),
.stem-why-copy p,
.stem-variation-copy p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 15px;
  font-weight: 650;
  line-height: 1.9;
}

.stem-image-stack {
  display: grid;
  grid-template-columns: 1fr 0.82fr;
  gap: 16px;
  align-items: end;
}

.stem-image-stack img,
.stem-why-media img,
.stem-variation-products img {
  width: 100%;
  object-fit: contain;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: 0 16px 42px rgba(46, 125, 82, 0.08);
}

.stem-image-stack img {
  aspect-ratio: 1 / 1;
  padding: 18px;
}

.stem-image-stack img:nth-child(2) {
  transform: translateY(28px);
}

.stem-domains {
  text-align: left;
}

.stem-domain-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  max-width: 1180px;
  margin: 34px auto 0;
}

.stem-domain-grid article {
  min-height: 230px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 14px 34px rgba(46, 125, 82, 0.07);
}

.stem-domain-grid span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 16px;
  color: #fff;
  background: var(--green);
  border-radius: 50%;
  font-size: 20px;
  font-weight: 900;
}

.stem-domain-grid h3 {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 18px;
  line-height: 1.35;
}

.stem-domain-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
  line-height: 1.75;
}

.stem-why {
  grid-template-columns: minmax(320px, 0.9fr) minmax(0, 1.1fr);
}

.stem-why-media img {
  aspect-ratio: 4 / 3;
  padding: clamp(16px, 3vw, 30px);
}

.stem-variation {
  grid-template-columns: minmax(0, 0.85fr) minmax(340px, 1.15fr);
  text-align: left;
}

.stem-variation-products {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.stem-variation-products img {
  aspect-ratio: 1 / 1;
  padding: 16px;
}

.stem-copy p:not(.section-en) {
  max-width: 520px;
  margin: 22px 0 20px;
  color: #4a574f;
  font-weight: 600;
}

.stem-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 34px 28px;
  padding-left: clamp(20px, 5vw, 70px);
  border-left: 1px dashed #cfdccd;
}

.news-about {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.9fr);
  gap: clamp(34px, 5vw, 70px);
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
}

.news-list {
  display: grid;
  gap: 0;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.news-list li {
  display: grid;
  grid-template-columns: 112px 92px 1fr;
  align-items: center;
  gap: 16px;
  padding: 17px 0;
  border-bottom: 1px solid var(--line);
}

.news-list time {
  color: #536056;
  font-size: 13px;
  font-weight: 800;
}

.news-list span {
  display: inline-flex;
  justify-content: center;
  padding: 3px 10px;
  color: var(--green);
  background: var(--leaf);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 900;
}

.news-list a {
  color: #26352b;
  font-size: 14px;
  font-weight: 700;
}

.news-list-page {
  max-width: 1080px;
  margin: 0 auto;
}

.news-list-page li {
  grid-template-columns: 130px 110px 1fr;
  padding: 24px 0;
}

.news-list-page a {
  font-size: 16px;
}

.about-panel {
  position: relative;
  padding-left: clamp(10px, 3vw, 46px);
  border-left: 1px solid var(--line);
}

.about-panel p:not(.section-en) {
  color: var(--muted);
  font-weight: 600;
}

.about-copy p:not(.section-en) {
  color: var(--muted);
  font-weight: 600;
}

.company-table {
  margin: 24px 0 0;
  border-top: 1px solid var(--line);
}

.company-table div {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.company-table dt {
  color: var(--green);
  font-size: 13px;
  font-weight: 900;
}

.company-table dd {
  margin: 0;
  color: #334237;
  font-size: 14px;
  font-weight: 700;
}

.about-hero {
  min-height: 330px;
}

.about-message {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(34px, 6vw, 88px);
  align-items: start;
}

.about-message-copy h2,
.about-vision-card h2,
.about-concept-card h2 {
  margin: 0;
}

.about-message-body {
  display: grid;
  gap: 18px;
  padding-left: clamp(0px, 3vw, 38px);
  border-left: 1px solid var(--line);
}

.about-message-body p,
.about-vision-card p,
.about-concept-card li,
.about-statement p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  font-weight: 650;
  line-height: 1.9;
}

.about-focus {
  text-align: left;
}

.about-value-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  max-width: 1180px;
  margin: 34px auto 0;
}

.about-value-grid article {
  min-height: 220px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 14px 34px rgba(46, 125, 82, 0.07);
}

.about-value-grid span {
  display: inline-flex;
  margin-bottom: 14px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.about-value-grid h3 {
  margin: 0 0 10px;
  color: var(--green);
  font-size: 19px;
  line-height: 1.45;
}

.about-value-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
  line-height: 1.75;
}

.about-vision {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(320px, 0.92fr);
  gap: clamp(24px, 4vw, 42px);
  align-items: stretch;
}

.about-vision-card,
.about-concept-card {
  padding: clamp(28px, 4vw, 48px);
  border: 1px solid var(--line);
  border-radius: 18px;
}

.about-vision-card {
  background: linear-gradient(120deg, #fff 0%, #fffdf8 100%);
  box-shadow: 0 18px 48px rgba(46, 125, 82, 0.08);
}

.about-concept-card {
  background: #f4f9f0;
}

.about-vision-card p {
  margin-top: 18px;
}

.about-concept-card ul {
  display: grid;
  gap: 14px;
  margin: 20px 0 0;
  padding-left: 20px;
}

.about-company {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
  gap: clamp(34px, 6vw, 82px);
  align-items: start;
}

.contact {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  margin: 0 clamp(16px, 4vw, 56px) 28px;
  background: linear-gradient(100deg, #f2f8ee, var(--cream));
  border-radius: 20px;
  box-shadow: inset 0 0 0 1px rgba(223, 231, 220, 0.8);
}

.contact-hero {
  min-height: 280px;
}

.contact-page {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(380px, 1.05fr);
  gap: clamp(30px, 5vw, 72px);
  align-items: start;
  padding-top: 42px;
}

.contact-panel {
  display: grid;
  gap: 28px;
  min-width: 0;
}

.contact-page .contact-intro {
  align-items: flex-start;
  flex-direction: column;
}

.contact-intro {
  display: flex;
  align-items: center;
  gap: 28px;
}

.contact-logo {
  width: 260px;
  max-width: 100%;
  height: auto;
  flex: 0 0 auto;
  padding: 8px 10px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 12px 28px rgba(46, 125, 82, 0.08);
}

.contact.page-section .contact-intro {
  align-items: flex-start;
  flex-direction: column;
}

.contact.page-section h2 {
  font-size: clamp(28px, 3vw, 36px);
  word-break: keep-all;
}

.contact-intro h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(28px, 2.8vw, 38px);
  line-height: 1.28;
  overflow-wrap: anywhere;
}

.contact-intro p:not(.section-en) {
  margin: 14px 0 0;
  color: var(--muted);
  font-weight: 600;
  overflow-wrap: anywhere;
}

.contact-cards {
  display: grid;
  gap: 14px;
}

.contact-cards article {
  padding: 22px 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  box-shadow: 0 14px 34px rgba(46, 125, 82, 0.07);
}

.contact-cards span {
  display: inline-flex;
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.contact-cards h3 {
  margin: 0 0 8px;
  color: var(--green);
  font-size: 18px;
}

.contact-cards p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
  line-height: 1.7;
}

.contact-form {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.contact-form-card {
  min-width: 0;
  padding: clamp(24px, 4vw, 38px);
  background: linear-gradient(180deg, #fff 0%, #fffdf8 100%);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 18px 48px rgba(46, 125, 82, 0.09);
}

.contact-form label {
  display: block;
}

.contact-form span {
  display: block;
  margin-bottom: 7px;
  color: #4f5c54;
  font-size: 12px;
  font-weight: 900;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  width: 100%;
  min-height: 48px;
  padding: 13px 16px;
  color: var(--ink);
  background: #fff;
  border: 1px solid #cfdccd;
  border-radius: 9px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.contact-form .form-honey {
  display: none;
}

.contact-form textarea {
  resize: vertical;
  min-height: 120px;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 4px rgba(46, 125, 82, 0.12);
}

.wide {
  grid-column: 1 / -1;
}

.form-submit {
  grid-column: 1 / 2;
  width: 100%;
  border: 0;
  cursor: pointer;
}

.form-message {
  grid-column: 1 / -1;
  min-height: 24px;
  margin: 0;
  color: var(--green);
  text-align: center;
  font-size: 13px;
  font-weight: 900;
}

.contact-form-card .form-message {
  align-self: center;
  text-align: left;
}

.site-footer {
  position: relative;
  display: grid;
  grid-template-columns: minmax(260px, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(42px, 7vw, 96px);
  padding: 56px clamp(20px, 5vw, 72px);
  overflow: hidden;
  color: rgba(255, 255, 255, 0.86);
  background:
    radial-gradient(circle at 95% 85%, rgba(102, 187, 106, 0.34), transparent 20%),
    linear-gradient(140deg, #136139, var(--deep));
}

.site-footer::after {
  position: absolute;
  right: -26px;
  bottom: -72px;
  content: "";
  width: 220px;
  height: 220px;
  border: 26px solid rgba(255, 255, 255, 0.08);
  border-radius: 50% 50% 48% 52%;
}

.footer-brand p {
  margin: 34px 0 0;
  font-size: 12px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 34px;
}

.footer-links h3 {
  margin: 0 0 14px;
  color: #fff;
  font-size: 14px;
}

.footer-links a {
  display: block;
  margin: 8px 0;
  font-size: 13px;
  font-weight: 600;
}

.product-detail {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(340px, 0.82fr);
  gap: clamp(34px, 5vw, 70px);
  align-items: start;
}

.product-detail-media,
.product-detail-copy {
  min-width: 0;
}

.product-main-image {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  padding: clamp(18px, 3vw, 36px);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 18px 48px rgba(46, 125, 82, 0.08);
}

.product-gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 14px;
}

.product-gallery img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  padding: 8px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 10px;
  cursor: pointer;
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease,
    transform 0.2s ease;
}

.product-gallery img:hover,
.product-gallery img:focus-visible,
.product-gallery img.is-active {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(46, 125, 82, 0.14);
}

.product-gallery img:hover {
  transform: translateY(-2px);
}

.product-detail-copy {
  position: sticky;
  top: 118px;
}

.product-detail-copy h1 {
  margin: 0 0 18px;
  color: var(--ink);
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.16;
}

.product-detail-copy .product-title-en {
  margin-top: 12px;
  font-size: clamp(18px, 2vw, 26px);
  line-height: 1.34;
}

.product-lead {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 16px;
  font-weight: 650;
  line-height: 1.9;
}

.product-spec {
  display: grid;
  gap: 10px;
  margin: 0 0 28px;
}

.product-spec div,
.company-table div {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 18px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.product-spec dt,
.company-table dt {
  color: var(--green);
  font-size: 13px;
  font-weight: 900;
}

.product-spec dd,
.company-table dd {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
  line-height: 1.75;
}

.about-page {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: clamp(36px, 6vw, 82px);
  align-items: start;
}

.about-statement h2 {
  margin-top: 0;
}

@media (max-width: 1060px) {
  .hero,
  .stem,
  .stem-explain,
  .stem-why,
  .stem-variation,
  .news-about,
  .contact,
  .contact-page,
  .about-message,
  .about-vision,
  .about-company,
  .product-detail,
  .about-page,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .hero-visual {
    min-height: 470px;
  }

  .feature-row,
  .product-grid {
    grid-template-columns: 1fr;
  }

  .catalog-grid {
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  }

  .about-value-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stem-domain-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about-message-body {
    padding-left: 0;
    border-left: 0;
  }

  .product-detail-copy {
    position: static;
  }

  .stem-list,
  .about-panel {
    padding-left: 0;
    border-left: 0;
  }

  .contact-form {
    grid-template-columns: 1fr 1fr;
  }

  .form-submit {
    grid-column: 1 / -1;
  }
}

@media (max-width: 820px) {
  .site-header {
    min-height: 72px;
  }

  .brand {
    min-width: 0;
  }

  .brand-logo {
    width: 186px;
  }

  .menu-button {
    display: block;
  }

  .site-nav {
    position: fixed;
    inset: 72px 16px auto 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 14px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
  }

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

  .site-nav a {
    padding: 13px 10px;
  }

  .nav-cta {
    justify-content: center;
    margin-top: 8px;
  }

  .section-pad {
    padding: 56px 20px;
  }

  .page-hero {
    min-height: 260px;
  }

  .page-hero h1 {
    max-width: calc(100vw - 40px);
    font-size: 34px;
  }

  .page-hero p:not(.section-en),
  .about-message-body p,
  .about-vision-card p,
  .about-concept-card li {
    max-width: calc(100vw - 40px);
  }

  .catalog-head {
    display: grid;
    align-items: start;
    gap: 8px;
  }

  .catalog-head > p {
    justify-self: start;
  }

  .hero-copy,
  .hero p,
  .play-learn h2,
  .stem-copy,
  .contact-intro,
  .about-panel,
  .news-panel {
    max-width: calc(100vw - 40px);
  }

  .play-learn h2 {
    margin-left: auto;
    margin-right: auto;
  }

  .hero {
    background: linear-gradient(180deg, #fff 0%, #fffdf8 100%);
  }

  .hero h1 {
    font-size: 38px;
  }

  h2 {
    font-size: 25px;
  }

  .hero-visual {
    min-height: 330px;
    overflow: hidden;
  }

  .hero-visual::before {
    inset: 20px 0 20px 0;
  }

  .hero-box {
    right: 0;
    top: 34px;
    width: 76%;
  }

  .hero-piece-a {
    left: 0;
    width: 48%;
  }

  .hero-piece-b {
    right: 0;
    width: 36%;
  }

  .play-learn,
  .stem,
  .contact {
    margin-left: 12px;
    margin-right: 12px;
  }

  .feature-item,
  .stem-list article,
  .contact-intro {
    flex-direction: column;
  }

  .contact-logo {
    width: 220px;
  }

  .contact-intro h2,
  .contact-intro p:not(.section-en),
  .contact-hero p:not(.section-en) {
    max-width: calc(100vw - 40px);
  }

  .contact-intro h2 {
    font-size: 28px;
  }

  .stem-list,
  .contact-form,
  .footer-links {
    grid-template-columns: 1fr;
  }

  .about-value-grid {
    grid-template-columns: 1fr;
  }

  .stem-domain-grid,
  .stem-image-stack,
  .stem-variation-products {
    grid-template-columns: 1fr;
  }

  .stem-image-stack img:nth-child(2) {
    transform: none;
  }

  .stem-explain-copy p:not(.section-en),
  .stem-why-copy p,
  .stem-variation-copy p {
    max-width: calc(100vw - 40px);
  }

  .stem-explain-copy h2,
  .stem-why-copy h2,
  .stem-variation-copy h2 {
    max-width: calc(100vw - 40px);
    font-size: 25px;
  }

  .about-message-copy h2,
  .about-vision-card h2,
  .about-concept-card h2,
  .about-statement h2 {
    max-width: calc(100vw - 40px);
    font-size: 25px;
  }

  .news-list li {
    grid-template-columns: 1fr;
    gap: 7px;
  }

  .news-list span {
    justify-self: start;
  }

  .company-table div {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .product-spec div {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .product-gallery {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition: none !important;
  }
}