:root {
  --leaf-900: #126b1f;
  --leaf-700: #22942d;
  --leaf-500: #61c92d;
  --leaf-300: #b8ef44;
  --sun: #ffd44d;
  --orange: #ff8c1a;
  --sky: #bcefff;
  --sky-soft: #eafcff;
  --cream: #fff9e9;
  --paper: rgba(255, 255, 255, 0.82);
  --ink: #19351b;
  --muted: #5d7659;
  --shadow: 0 24px 70px rgba(44, 120, 33, 0.18);
  --round: 34px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family:
    "Tsukushi A Round Gothic",
    "Hiragino Maru Gothic ProN",
    "PingFang SC",
    "Microsoft YaHei",
    sans-serif;
  background:
    radial-gradient(circle at 8% 12%, rgba(255, 212, 77, 0.34), transparent 24rem),
    radial-gradient(circle at 90% 2%, rgba(97, 201, 45, 0.2), transparent 28rem),
    linear-gradient(180deg, #ddf8ff 0%, #f8ffe7 47%, #fff9e9 100%);
  overflow-x: hidden;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  content: "";
  background-image:
    radial-gradient(circle, rgba(34, 148, 45, 0.16) 0 2px, transparent 2px),
    linear-gradient(120deg, transparent 0 48%, rgba(255, 255, 255, 0.56) 49% 51%, transparent 52%);
  background-size: 42px 42px, 220px 220px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.62), transparent 72%);
}

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

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

a:focus-visible,
button:focus-visible {
  outline: 4px solid rgba(255, 212, 77, 0.8);
  outline-offset: 4px;
}

.site-header {
  position: sticky;
  top: 18px;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1160px, calc(100% - 36px));
  margin: 18px auto 0;
  padding: 12px 14px 12px 22px;
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid rgba(255, 255, 255, 0.88);
  border-radius: 999px;
  box-shadow: 0 16px 45px rgba(32, 118, 32, 0.13);
  backdrop-filter: blur(20px);
}

.brand img {
  width: 156px;
}

.site-nav {
  display: flex;
  gap: 8px;
  align-items: center;
  color: var(--leaf-900);
  font-size: 15px;
  font-weight: 800;
}

.site-nav a {
  padding: 11px 15px;
  border-radius: 999px;
  transition:
    transform 180ms ease,
    background 180ms ease;
}

.site-nav a:hover {
  background: rgba(97, 201, 45, 0.14);
  transform: translateY(-1px);
}

.site-nav a.is-active {
  color: #fff;
  background: linear-gradient(135deg, var(--leaf-700), var(--leaf-500));
  box-shadow: 0 10px 24px rgba(34, 148, 45, 0.26);
}

.site-nav .nav-button {
  color: var(--leaf-900);
  background: rgba(97, 201, 45, 0.1);
  border: 1px solid rgba(34, 148, 45, 0.16);
}

.site-nav .nav-policy {
  color: var(--muted);
  font-size: 14px;
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid rgba(34, 148, 45, 0.1);
}

.section-pad {
  width: min(1160px, calc(100% - 36px));
  margin-inline: auto;
  padding: 94px 0;
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.92fr);
  gap: 54px;
  align-items: center;
  min-height: calc(100vh - 92px);
}

.hero::after {
  position: absolute;
  right: -22vw;
  bottom: -12%;
  z-index: -1;
  width: 78vw;
  height: 34vh;
  content: "";
  background:
    radial-gradient(ellipse at 50% 0%, rgba(97, 201, 45, 0.48), transparent 62%),
    linear-gradient(180deg, rgba(158, 226, 70, 0.7), rgba(33, 149, 45, 0.04));
  border-radius: 52% 48% 0 0;
}

.eyebrow {
  display: inline-flex;
  gap: 8px;
  align-items: center;
  margin: 0 0 18px;
  color: var(--leaf-900);
  font-size: 15px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.eyebrow::before,
.eyebrow::after {
  width: 18px;
  height: 18px;
  content: "";
  background: radial-gradient(circle at 62% 36%, var(--leaf-300), var(--leaf-700));
  border-radius: 70% 30% 70% 30%;
  transform: rotate(-25deg);
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 680px;
  margin-bottom: 24px;
  font-size: clamp(52px, 8vw, 106px);
  line-height: 0.92;
  letter-spacing: -0.065em;
  color: var(--leaf-900);
  text-shadow: 0 5px 0 rgba(255, 255, 255, 0.72);
  text-wrap: balance;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(34px, 4.2vw, 58px);
  line-height: 1.04;
  letter-spacing: -0.04em;
  color: var(--leaf-900);
}

h3 {
  margin-bottom: 10px;
  font-size: 25px;
  color: var(--leaf-900);
}

.hero-text,
.section-heading p,
.journey-copy p,
.download-card p {
  color: var(--muted);
  font-size: 19px;
  line-height: 1.85;
}

.hero-text {
  max-width: 640px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin: 34px 0 28px;
}

.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 0 24px;
  font-weight: 900;
  border-radius: 999px;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease;
}

.primary-button {
  color: #fff;
  background: linear-gradient(135deg, var(--orange), var(--sun));
  box-shadow: 0 16px 34px rgba(255, 140, 26, 0.32);
}

.secondary-button {
  color: var(--leaf-900);
  background: rgba(255, 255, 255, 0.7);
  border: 2px solid rgba(34, 148, 45, 0.2);
}

.primary-button:hover,
.secondary-button:hover {
  transform: translateY(-3px) scale(1.02);
}

.hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  max-width: 660px;
  margin: 0;
}

.hero-metrics div {
  padding: 18px;
  background: rgba(255, 255, 255, 0.68);
  border: 1px solid rgba(255, 255, 255, 0.88);
  border-radius: 24px;
  box-shadow: 0 12px 28px rgba(31, 128, 32, 0.1);
}

.hero-metrics dt {
  margin-bottom: 6px;
  color: var(--leaf-700);
  font-size: 26px;
  font-weight: 950;
}

.hero-metrics dd {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.55;
}

.hero-visual {
  position: relative;
  min-height: 720px;
  overflow: hidden;
}

.sun-orbit {
  position: absolute;
  inset: 8% -3% auto auto;
  width: 410px;
  aspect-ratio: 1;
  background:
    radial-gradient(circle, rgba(255, 242, 145, 0.95), rgba(255, 212, 77, 0.24) 54%, transparent 58%),
    conic-gradient(from 8deg, transparent 0 8%, rgba(255, 212, 77, 0.3) 8% 10%, transparent 10% 18%);
  border-radius: 999px;
  animation: spin 22s linear infinite;
}

.mascot {
  position: absolute;
  bottom: 16px;
  left: -32px;
  z-index: 2;
  width: min(380px, 76%);
  filter: drop-shadow(0 34px 38px rgba(37, 114, 30, 0.18));
  animation: bob 4.8s ease-in-out infinite;
}

.phone-card {
  position: absolute;
  right: 4px;
  top: 2px;
  width: min(396px, 73%);
  padding: 16px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(255, 255, 255, 0.92);
  border-radius: 46px;
  box-shadow: var(--shadow);
  transform: rotate(4deg);
}

.phone-card img {
  border-radius: 32px;
}

.floating-card {
  position: absolute;
  z-index: 3;
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 950;
  border: 6px solid rgba(255, 255, 255, 0.75);
  border-radius: 24px;
  box-shadow: 0 18px 38px rgba(52, 120, 33, 0.2);
  animation: float 5.4s ease-in-out infinite;
}

.card-a {
  bottom: 92px;
  left: 18px;
  width: 110px;
  height: 96px;
  font-size: 30px;
  background: linear-gradient(145deg, #ffb629, #ff7f18);
}

.card-b {
  right: 12px;
  bottom: 150px;
  width: 122px;
  height: 78px;
  color: var(--leaf-900);
  background: linear-gradient(145deg, #fff, #dfffc3);
  animation-delay: 600ms;
}

.card-c {
  top: 118px;
  left: 6px;
  width: 138px;
  height: 78px;
  background: linear-gradient(145deg, #26c2f7, #1681df);
  animation-delay: 1.2s;
}

.section-heading {
  max-width: 760px;
  margin: 0 auto 44px;
  text-align: center;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.feature-card {
  position: relative;
  min-height: 292px;
  padding: 28px;
  overflow: hidden;
  background: var(--paper);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: var(--round);
  box-shadow: var(--shadow);
}

.feature-card::after {
  position: absolute;
  right: -34px;
  bottom: -34px;
  width: 118px;
  height: 118px;
  content: "";
  background: rgba(255, 212, 77, 0.28);
  border-radius: 999px;
}

.feature-card p {
  position: relative;
  z-index: 1;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 68px;
  height: 68px;
  margin-bottom: 24px;
  border-radius: 22px;
  box-shadow: inset 0 -8px 0 rgba(0, 0, 0, 0.08);
}

.feature-icon::before {
  color: #fff;
  font-size: 34px;
  font-weight: 950;
}

.feature-icon.audio {
  background: linear-gradient(145deg, #ffca3a, #ff8c1a);
}

.feature-icon.audio::before {
  content: "♪";
}

.feature-icon.word {
  background: linear-gradient(145deg, #6de447, #209a32);
}

.feature-icon.word::before {
  content: "A";
}

.feature-icon.read {
  background: linear-gradient(145deg, #41d4ff, #178ee4);
}

.feature-icon.read::before {
  content: "📖";
  font-size: 30px;
}

.feature-icon.quiz {
  background: linear-gradient(145deg, #d99bff, #8c63ef);
}

.feature-icon.quiz::before {
  content: "✓";
}

.journey {
  display: grid;
  grid-template-columns: 0.82fr 1fr;
  gap: 44px;
  align-items: center;
}

.journey-copy {
  padding: 42px;
  background: rgba(255, 255, 255, 0.58);
  border: 1px solid rgba(255, 255, 255, 0.85);
  border-radius: var(--round);
  box-shadow: var(--shadow);
}

.check-list {
  display: grid;
  gap: 14px;
  padding: 0;
  margin: 30px 0 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding: 16px 18px 16px 52px;
  color: var(--muted);
  font-weight: 800;
  line-height: 1.65;
  background: rgba(255, 255, 255, 0.72);
  border-radius: 20px;
}

.check-list li::before {
  position: absolute;
  left: 18px;
  color: var(--orange);
  content: "★";
}

.map-panel {
  position: relative;
  padding: 18px;
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.84), rgba(255, 255, 255, 0.58)),
    radial-gradient(circle at 20% 0%, rgba(255, 212, 77, 0.38), transparent 34%);
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 44px;
  box-shadow: var(--shadow);
}

.map-panel::before {
  position: absolute;
  inset: 18px;
  content: "";
  border: 3px dashed rgba(255, 212, 77, 0.7);
  border-radius: 32px;
  pointer-events: none;
}

.map-panel img {
  width: 100%;
  max-height: 640px;
  object-fit: cover;
  object-position: top center;
  border-radius: 32px;
}

.screens {
  width: min(1260px, calc(100% - 36px));
}

.screen-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.screen-card {
  position: relative;
  margin: 0;
  padding: 12px 12px 22px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid rgba(255, 255, 255, 0.92);
  border-radius: 36px;
  box-shadow: var(--shadow);
  transform: rotate(var(--tilt, -1deg));
}

.screen-card:nth-child(2) {
  --tilt: 1.6deg;
}

.screen-card:nth-child(3) {
  --tilt: -1.8deg;
}

.screen-card:nth-child(4) {
  --tilt: 1deg;
}

.screen-card img {
  width: 100%;
  aspect-ratio: 9 / 16;
  object-fit: cover;
  object-position: top center;
  border-radius: 27px;
}

.screen-card figcaption {
  padding-top: 16px;
  color: var(--leaf-900);
  font-size: 20px;
  font-weight: 950;
  text-align: center;
}

.download {
  padding-top: 42px;
}

.download-card {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: center;
  padding: 46px;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(239, 255, 218, 0.86)),
    radial-gradient(circle at 88% 12%, rgba(255, 212, 77, 0.38), transparent 24rem);
  border: 1px solid rgba(255, 255, 255, 0.96);
  border-radius: 44px;
  box-shadow: var(--shadow);
}

.store-actions {
  display: grid;
  grid-template-columns: repeat(2, minmax(150px, 1fr));
  gap: 14px;
}

.contact-line {
  margin: 20px 0 0;
  padding: 14px 18px;
  color: var(--leaf-900);
  font-weight: 900;
  background: rgba(255, 255, 255, 0.66);
  border: 1px solid rgba(34, 148, 45, 0.14);
  border-radius: 20px;
}

.contact-line a,
.site-footer a {
  color: var(--leaf-700);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
}

.store-button {
  display: flex;
  gap: 12px;
  align-items: center;
  min-width: 170px;
  padding: 18px 22px;
  color: #fff;
  background: linear-gradient(145deg, var(--leaf-900), var(--leaf-500));
  border-radius: 24px;
  box-shadow: 0 16px 30px rgba(34, 148, 45, 0.25);
  cursor: pointer;
}

.store-button[aria-disabled="true"] {
  cursor: not-allowed;
  opacity: 0.76;
}

.store-button.is-live {
  background: linear-gradient(145deg, var(--orange), var(--sun));
  box-shadow: 0 16px 30px rgba(255, 140, 26, 0.28);
}

.store-button img {
  width: 42px;
  height: 42px;
  flex: 0 0 auto;
  border-radius: 12px;
  box-shadow: 0 8px 18px rgba(25, 53, 27, 0.18);
}

.store-button span {
  display: grid;
  gap: 2px;
}

.store-button small {
  font-size: 13px;
  font-weight: 900;
  opacity: 0.8;
}

.store-button strong {
  font-size: 20px;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  justify-content: space-between;
  width: min(1160px, calc(100% - 36px));
  padding: 28px 0 44px;
  margin: 0 auto;
  color: var(--muted);
}

.site-footer img {
  width: 140px;
}

.site-footer p {
  margin: 0;
  font-weight: 800;
}

.reveal {
  animation: rise 760ms ease both;
}

.feature-card:nth-child(2),
.screen-card:nth-child(2) {
  animation-delay: 100ms;
}

.feature-card:nth-child(3),
.screen-card:nth-child(3) {
  animation-delay: 200ms;
}

.feature-card:nth-child(4),
.screen-card:nth-child(4) {
  animation-delay: 300ms;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(22px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes bob {
  0%,
  100% {
    transform: translateY(0) rotate(-2deg);
  }

  50% {
    transform: translateY(-14px) rotate(2deg);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0) rotate(-4deg);
  }

  50% {
    transform: translateY(-12px) rotate(5deg);
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 1ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 1ms !important;
  }
}

@media (max-width: 980px) {
  .site-header {
    align-items: flex-start;
    border-radius: 28px;
  }

  .site-nav {
    flex-wrap: wrap;
    justify-content: flex-end;
  }

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

  .hero {
    gap: 24px;
    min-height: auto;
    padding-top: 72px;
  }

  .hero-visual {
    min-height: 670px;
  }

  .feature-grid,
  .screen-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .download-card {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 680px) {
  .site-header {
    position: static;
    display: grid;
    gap: 12px;
    margin-top: 12px;
    padding: 14px;
  }

  .brand img {
    width: 138px;
  }

  .site-nav {
    justify-content: flex-start;
    font-size: 13px;
  }

  .site-nav a {
    padding: 9px 11px;
  }

  .section-pad {
    width: min(100% - 24px, 1160px);
    padding: 64px 0;
  }

  h1 {
    max-width: 8em;
    font-size: clamp(42px, 14vw, 56px);
    line-height: 0.98;
    letter-spacing: -0.055em;
  }

  h2 {
    font-size: 34px;
  }

  .hero-text,
  .section-heading p,
  .journey-copy p,
  .download-card p {
    font-size: 16px;
    line-height: 1.75;
  }

  .hero-metrics,
  .feature-grid,
  .screen-strip,
  .store-actions {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 560px;
  }

  .hero::after {
    right: 0;
    width: 100%;
  }

  .sun-orbit {
    inset: 7% 8px auto auto;
    width: min(74vw, 288px);
  }

  .phone-card {
    right: 0;
    width: 68%;
    border-radius: 32px;
    transform: rotate(2deg);
  }

  .phone-card img {
    border-radius: 22px;
  }

  .mascot {
    left: 0;
    width: 68%;
  }

  .floating-card {
    border-width: 4px;
    border-radius: 18px;
  }

  .card-a {
    width: 86px;
    height: 76px;
    font-size: 24px;
  }

  .card-b,
  .card-c {
    width: 96px;
    height: 62px;
  }

  .journey-copy,
  .download-card {
    padding: 26px;
    border-radius: 30px;
  }

  .map-panel {
    padding: 12px;
    border-radius: 30px;
  }

  .map-panel::before {
    inset: 12px;
    border-radius: 22px;
  }

  .map-panel img {
    border-radius: 22px;
  }

  .site-footer {
    display: grid;
    padding-bottom: 30px;
  }
}