:root {
  --background: var(--color-background);
  --foreground: var(--color-text-primary);
  --muted: var(--color-text-muted);
  --muted-foreground: var(--color-text-secondary);
  --card: var(--color-surface);
  --card-foreground: var(--color-text-primary);
  --primary: var(--color-primary);
  --primary-foreground: var(--color-text-on-accent);
  --primary-soft: var(--color-primary-soft);
  --primary-strong: var(--color-primary-hover);
  --secondary: var(--color-surface-subtle);
  --secondary-foreground: var(--color-text-secondary);
  --accent-green: var(--color-secondary);
  --accent-green-soft: var(--color-secondary-soft);
  --accent-amber: var(--color-accent);
  --accent-amber-soft: var(--color-accent-soft);
  --border: var(--color-border);
  --ring: var(--color-focus);
  --shadow: var(--shadow-lg);
  --shadow-soft: var(--shadow-sm);
  --radius: var(--radius-sm);
  --container: 1180px;
  --landing-header-height: 76px;
  --landing-mobile-nav-height: 0px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  min-width: 320px;
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--foreground);
  background: var(--background);
  letter-spacing: 0;
  overflow-x: hidden;
}

body.menu-open {
  overflow: hidden;
}

body.modal-open {
  overflow: hidden;
}

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

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

button,
input {
  font: inherit;
}

button {
  border: 0;
}

.section-shell,
.header-shell,
.footer-shell {
  width: min(var(--container), calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-surface) 92%, transparent);
  border-bottom: 1px solid color-mix(in srgb, var(--color-border) 90%, transparent);
  backdrop-filter: blur(18px);
  transition: background 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.site-header.is-scrolled {
  background: color-mix(in srgb, var(--color-surface) 97%, transparent);
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header-shell {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  transition: min-height 0.2s ease;
}

.site-header.is-scrolled .header-shell {
  min-height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: max-content;
}

.brand-mark {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--primary);
  box-shadow: 0 10px 28px color-mix(in srgb, var(--color-primary) 22%, transparent);
}

.brand-mark img {
  width: 34px;
  height: auto;
}

.brand-text {
  display: grid;
  gap: 1px;
}

.brand-text strong {
  font-size: 1rem;
  line-height: 1.1;
}

.brand-text span {
  color: var(--muted);
  font-size: 0.78rem;
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 6px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--color-surface-subtle) 82%, transparent);
}

.main-nav a {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border-radius: 6px;
  color: var(--secondary-foreground);
  font-size: 0.92rem;
  font-weight: 600;
  white-space: nowrap;
}

.main-nav a:hover {
  background: var(--primary-soft);
  color: var(--primary-strong);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.site-language-switcher {
  display: inline-grid;
  grid-template-columns: repeat(2, 46px);
  gap: 4px;
  padding: 4px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--color-surface-subtle) 86%, transparent);
}

.site-language-switcher button {
  min-height: 44px;
  border-radius: 6px;
  color: var(--muted-foreground);
  background: transparent;
  cursor: pointer;
  font-size: 0.84rem;
  font-weight: 800;
  transition: background 0.18s ease, color 0.18s ease, box-shadow 0.18s ease;
}

.site-language-switcher button.active {
  color: var(--color-text-on-accent);
  background: linear-gradient(135deg, var(--primary), var(--accent-green));
  box-shadow: 0 8px 18px color-mix(in srgb, var(--color-primary) 18%, transparent);
}

.btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 16px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 0.95rem;
  line-height: 1;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

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

.btn:focus-visible,
.icon-button:focus-visible,
.switch-form button:focus-visible,
.input-group input:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 2px;
}

.btn-primary {
  color: var(--primary-foreground);
  background: var(--primary);
  box-shadow: 0 12px 28px color-mix(in srgb, var(--color-primary) 24%, transparent);
}

.btn-primary:hover {
  background: var(--primary-strong);
}

.btn-secondary {
  color: var(--primary-strong);
  background: var(--primary-soft);
  border-color: color-mix(in srgb, var(--color-primary) 20%, transparent);
}

.btn-secondary:hover {
  background: var(--color-primary-soft);
}

.btn-ghost {
  color: var(--secondary-foreground);
  background: var(--color-surface);
  border-color: var(--border);
}

.btn-ghost:hover {
  color: var(--primary-strong);
  border-color: color-mix(in srgb, var(--color-primary) 28%, transparent);
}

.icon-button {
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
  display: inline-grid;
  place-items: center;
  border-radius: var(--radius);
  color: var(--primary-strong);
  background: var(--primary-soft);
  cursor: pointer;
}

.menu-toggle {
  display: none;
}

.daily-phrase-box {
  min-height: 40px;
  display: grid;
  place-items: center;
  padding: 8px 20px;
  overflow: hidden;
  color: var(--primary-strong);
  background: var(--color-surface-subtle);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.45;
  text-align: center;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.hero-carousel {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: 0;
  background:
    radial-gradient(circle at 84% 12%, color-mix(in srgb, var(--color-secondary) 15%, transparent), transparent 30%),
    radial-gradient(circle at 14% 82%, color-mix(in srgb, var(--color-primary) 11%, transparent), transparent 36%),
    linear-gradient(135deg, var(--color-surface) 0%, var(--color-surface-subtle) 52%, var(--color-background-elevated) 100%);
}

.grid-surface::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(color-mix(in srgb, var(--color-primary) 8%, transparent) 1px, transparent 1px),
    linear-gradient(90deg, color-mix(in srgb, var(--color-primary) 8%, transparent) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: linear-gradient(to bottom, var(--color-mask-strong), transparent 86%);
}

.hero-carousel-viewport {
  position: relative;
  z-index: 1;
  overflow: hidden;
  outline: 0;
  touch-action: pan-y;
}

.hero-carousel-viewport:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: -3px;
}

.hero-carousel-track {
  display: flex;
  align-items: stretch;
  width: 100%;
  transform: translate3d(0, 0, 0);
  transition: transform 0.62s var(--ease-standard);
  will-change: transform;
}

.hero-carousel[data-active-slide="1"] .hero-carousel-track {
  transform: translate3d(-100%, 0, 0);
}

.hero-carousel[data-active-slide="2"] .hero-carousel-track {
  transform: translate3d(-200%, 0, 0);
}

.hero-slide {
  position: relative;
  flex: 0 0 100%;
  min-width: 0;
  min-height: 650px;
  display: flex;
  align-items: stretch;
  padding: clamp(62px, 6vw, 78px) 0 clamp(36px, 4vw, 52px);
  overflow: hidden;
}

.hero-slide::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-slide-theme-platform::before {
  background: radial-gradient(circle at 76% 20%, color-mix(in srgb, var(--color-primary) 13%, transparent), transparent 34%);
}

.hero-slide-theme-ai::before {
  background: radial-gradient(circle at 80% 18%, color-mix(in srgb, var(--color-secondary) 18%, transparent), transparent 34%);
}

.hero-slide-theme-materials::before {
  background: radial-gradient(circle at 78% 22%, color-mix(in srgb, var(--color-accent) 17%, transparent), transparent 35%);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.16fr) minmax(390px, 0.84fr);
  align-items: center;
  gap: clamp(48px, 5vw, 72px);
}

.hero-copy {
  max-width: 700px;
}

.eyebrow,
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  min-height: 30px;
  padding: 0 10px;
  border: 1px solid color-mix(in srgb, var(--color-primary) 18%, transparent);
  border-radius: 999px;
  color: var(--primary-strong);
  background: color-mix(in srgb, var(--color-surface) 78%, transparent);
  font-size: 0.82rem;
  font-weight: 800;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--color-secondary) 14%, transparent);
}

.hero-slide-title {
  margin: 18px 0 18px;
  max-width: 700px;
  color: var(--color-primary-hover);
  font-size: clamp(3rem, 5vw, 4.4rem);
  line-height: 1.06;
  letter-spacing: -0.025em;
  text-wrap: balance;
}

.hero-slide-lead {
  max-width: 650px;
  margin: 0;
  color: var(--muted-foreground);
  font-size: clamp(1.05rem, 1.5vw, 1.18rem);
  line-height: 1.64;
}

.hero-slide-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.hero-slide-note {
  max-width: 610px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.52;
}

.hero-trust-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.hero-trust-item {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid color-mix(in srgb, var(--color-border) 92%, transparent);
  border-radius: var(--radius-pill);
  color: var(--secondary-foreground);
  background: color-mix(in srgb, var(--color-surface) 82%, transparent);
  box-shadow: var(--shadow-xs);
  font-size: 0.86rem;
  font-weight: 800;
  line-height: 1.25;
}

.hero-trust-item i {
  color: var(--color-primary-hover);
  font-size: 0.82rem;
}

.hero-slide [data-hero-animate] {
  opacity: 0.12;
  transform: translateY(18px);
  transition: opacity 0.56s var(--ease-standard), transform 0.56s var(--ease-standard);
}

.hero-slide.is-active [data-hero-animate] {
  opacity: 1;
  transform: translateY(0);
}

.hero-slide.is-active [data-hero-animate]:nth-child(2) {
  transition-delay: 0.06s;
}

.hero-slide.is-active [data-hero-animate]:nth-child(3) {
  transition-delay: 0.12s;
}

.hero-slide.is-active [data-hero-animate]:nth-child(4) {
  transition-delay: 0.18s;
}

.hero-slide.is-active [data-hero-animate]:nth-child(5) {
  transition-delay: 0.24s;
}

.hero-slide.is-active [data-hero-animate]:nth-child(6) {
  transition-delay: 0.3s;
}

.hero-visual {
  position: relative;
  width: 100%;
  max-width: 520px;
  justify-self: end;
  opacity: 0.15;
  transform: translateX(22px) scale(1.025);
  transition: opacity 0.64s var(--ease-standard), transform 0.64s var(--ease-standard);
}

.hero-slide.is-active .hero-visual {
  opacity: 1;
  transform: translateX(0) scale(1);
  transition-delay: 0.12s;
}

.hero-media-frame {
  position: relative;
  width: min(100%, 490px);
  aspect-ratio: 5 / 6;
  margin-inline: auto;
  overflow: hidden;
  border: 1px solid color-mix(in srgb, var(--color-border) 94%, transparent);
  border-radius: var(--radius-xl);
  background: var(--color-surface);
  box-shadow: var(--shadow-lg);
}

.hero-media-frame::before {
  content: "";
  position: absolute;
  inset: 12px;
  z-index: 1;
  border: 1px solid color-mix(in srgb, var(--color-text-inverse) 34%, transparent);
  border-radius: var(--radius-lg);
  pointer-events: none;
}

.hero-media-frame picture,
.hero-media-frame img {
  width: 100%;
  height: 100%;
}

.hero-media-frame picture {
  display: block;
}

.hero-media-frame img {
  object-fit: cover;
  object-position: 50% 42%;
}

.hero-slide-theme-ai .hero-media-frame img {
  object-position: 52% 40%;
}

.hero-slide-theme-materials .hero-media-frame img {
  object-position: 48% 43%;
}

.hero-media-card {
  position: absolute;
  right: auto;
  bottom: 22px;
  left: 22px;
  z-index: 2;
  width: min(340px, calc(100% - 44px));
  display: grid;
  gap: 10px;
  padding: 16px;
  border: 1px solid color-mix(in srgb, var(--color-border-strong) 74%, transparent);
  border-radius: var(--radius-lg);
  color: var(--foreground);
  background: var(--color-surface-glass);
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(16px);
  opacity: 0.2;
  transform: translateY(16px);
  transition: opacity 0.54s var(--ease-standard), transform 0.54s var(--ease-standard);
}

.hero-slide.is-active .hero-media-card {
  opacity: 1;
  transform: translateY(0);
  transition-delay: 0.3s;
}

.hero-media-card-label {
  width: fit-content;
  padding: 5px 9px;
  border-radius: var(--radius-pill);
  color: var(--primary-strong);
  background: var(--primary-soft);
  font-size: 0.74rem;
  font-weight: 900;
  letter-spacing: 0.025em;
}

.hero-media-card-body {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
}

.hero-media-card-body > i {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-md);
  color: var(--color-text-on-accent);
  background: var(--gradient-brand);
}

.hero-media-card strong,
.hero-media-card span {
  display: block;
}

.hero-media-card strong {
  color: var(--foreground);
  font-size: 1rem;
  line-height: 1.34;
}

.hero-media-card-body span,
.hero-media-demo > span:not(.hero-media-card-label):not(.hero-media-card-meta) {
  margin-top: 3px;
  color: var(--muted-foreground);
  font-size: 0.82rem;
  font-weight: 700;
  line-height: 1.42;
}

.hero-media-card-meta {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  width: fit-content;
  color: var(--primary-strong);
  font-size: 0.78rem;
  font-weight: 900;
}

.hero-media-demo {
  gap: 7px;
}

.hero-media-demo .hero-media-card-meta {
  display: inline-flex;
  margin-top: 5px;
}

.hero-carousel-navigation {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  align-items: center;
  gap: 18px;
  padding-bottom: 38px;
}

.hero-carousel-arrows {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  justify-self: start;
}

.hero-carousel-navigation .icon-button {
  border: 1px solid color-mix(in srgb, var(--color-border) 94%, transparent);
  color: var(--primary-strong);
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
  box-shadow: var(--shadow-xs);
  transition: transform 0.18s ease, color 0.18s ease, background 0.18s ease, border-color 0.18s ease;
}

.hero-carousel-navigation .icon-button:hover {
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--color-primary) 32%, transparent);
  background: var(--primary-soft);
}

.hero-carousel-counter {
  min-width: 76px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  text-align: center;
}

.hero-carousel-counter strong {
  color: var(--foreground);
  font-size: 1rem;
}

.hero-carousel-dots {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 2px;
}

.hero-carousel-dot {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: var(--radius-pill);
  background: transparent;
  cursor: pointer;
}

.hero-carousel-dot span {
  width: 25px;
  height: 6px;
  border-radius: var(--radius-pill);
  background: var(--color-border-strong);
  transition: width 0.2s ease, background 0.2s ease;
}

.hero-carousel-dot.is-active span {
  width: 36px;
  background: var(--gradient-brand);
}

.hero-carousel-toggle {
  justify-self: end;
}

:root[data-theme="dark"] .hero-media-card {
  background: color-mix(in srgb, var(--color-surface-elevated) 90%, transparent);
}

:root[data-theme="dark"] .hero-carousel {
  background:
    radial-gradient(circle at 84% 12%, color-mix(in srgb, var(--color-secondary) 13%, transparent), transparent 30%),
    radial-gradient(circle at 14% 82%, color-mix(in srgb, var(--color-primary) 9%, transparent), transparent 36%),
    linear-gradient(135deg, var(--color-background) 0%, var(--color-surface) 54%, var(--color-background-elevated) 100%);
}

.section {
  position: relative;
  overflow-x: clip;
  padding: clamp(72px, 7vw, 92px) 0;
}

.section-heading {
  max-width: 760px;
  margin: 0 auto 38px;
  text-align: center;
}

.section-heading h2,
.platform-content h2,
.image-content h2,
.cta-section h2 {
  margin: 14px 0 12px;
  color: var(--color-primary-hover);
  font-size: clamp(2.15rem, 4vw, 2.8rem);
  line-height: 1.08;
  letter-spacing: 0;
}

.section-heading p,
.platform-content p,
.image-content p,
.cta-section p {
  margin: 0;
  color: var(--muted-foreground);
  font-size: 1.04rem;
  line-height: 1.7;
}

.subjects-grid,
.steps-grid {
  display: grid;
  gap: 18px;
}

.subject-card,
.step-card {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--card);
  box-shadow: var(--shadow-soft);
}

.subject-card h3,
.step-card h3,
.feature-row h3 {
  margin: 0 0 10px;
  color: var(--card-foreground);
  font-size: 1.15rem;
}

.subject-card p,
.step-card p,
.feature-row p {
  margin: 0;
  color: var(--muted-foreground);
  line-height: 1.62;
}

.platform-section {
  overflow: hidden;
  background:
    linear-gradient(180deg, var(--color-surface-subtle) 0%, var(--color-surface) 100%);
}

.hex-surface::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.45;
  background:
    linear-gradient(30deg, color-mix(in srgb, var(--color-primary) 12%, transparent) 12%, transparent 12.5%, transparent 87%, color-mix(in srgb, var(--color-primary) 12%, transparent) 87.5%, color-mix(in srgb, var(--color-primary) 12%, transparent)),
    linear-gradient(150deg, color-mix(in srgb, var(--color-primary) 12%, transparent) 12%, transparent 12.5%, transparent 87%, color-mix(in srgb, var(--color-primary) 12%, transparent) 87.5%, color-mix(in srgb, var(--color-primary) 12%, transparent)),
    linear-gradient(30deg, color-mix(in srgb, var(--color-primary) 12%, transparent) 12%, transparent 12.5%, transparent 87%, color-mix(in srgb, var(--color-primary) 12%, transparent) 87.5%, color-mix(in srgb, var(--color-primary) 12%, transparent)),
    linear-gradient(150deg, color-mix(in srgb, var(--color-primary) 12%, transparent) 12%, transparent 12.5%, transparent 87%, color-mix(in srgb, var(--color-primary) 12%, transparent) 87.5%, color-mix(in srgb, var(--color-primary) 12%, transparent)),
    linear-gradient(60deg, color-mix(in srgb, var(--color-secondary) 8%, transparent) 25%, transparent 25.5%, transparent 75%, color-mix(in srgb, var(--color-secondary) 8%, transparent) 75%, color-mix(in srgb, var(--color-secondary) 8%, transparent)),
    linear-gradient(60deg, color-mix(in srgb, var(--color-secondary) 8%, transparent) 25%, transparent 25.5%, transparent 75%, color-mix(in srgb, var(--color-secondary) 8%, transparent) 75%, color-mix(in srgb, var(--color-secondary) 8%, transparent));
  background-color: transparent;
  background-position: 0 0, 0 0, 40px 70px, 40px 70px, 0 0, 40px 70px;
  background-size: 80px 140px;
  mask-image: linear-gradient(90deg, transparent, var(--color-mask-opaque) 22%, var(--color-mask-opaque) 78%, transparent);
}

.platform-grid,
.image-grid,
.cta-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1fr);
  align-items: center;
  gap: 54px;
}

.platform-media {
  width: 100%;
  max-height: 480px;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--color-surface);
  box-shadow: var(--shadow);
}

.platform-media picture,
.platform-media img,
.image-frame picture,
.image-frame img,
.program-media picture,
.program-media img {
  width: 100%;
  height: 100%;
}

.platform-media picture,
.image-frame picture,
.program-media picture {
  display: block;
}

.platform-media img {
  object-fit: cover;
  object-position: center;
}

.platform-content {
  max-width: 600px;
}

.feature-list {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.feature-row {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 14px;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--color-surface) 86%, transparent);
}

.feature-row i {
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  color: var(--primary);
  background: var(--primary-soft);
}

.steps-section {
  background: var(--color-surface);
}

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

.step-card {
  position: relative;
  min-height: 210px;
  padding: 24px;
  overflow: hidden;
}

.step-card::after {
  content: "";
  position: absolute;
  right: -34px;
  bottom: -34px;
  width: 130px;
  height: 130px;
  border: 1px solid color-mix(in srgb, var(--color-primary) 14%, transparent);
  border-radius: 50%;
}

.step-card span {
  display: inline-grid;
  place-items: center;
  width: 44px;
  height: 32px;
  margin-bottom: 34px;
  border-radius: var(--radius);
  color: var(--primary-strong);
  background: var(--primary-soft);
  font-weight: 900;
}

.subjects-section {
  background: var(--secondary);
}

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

.subject-card {
  min-height: 220px;
  padding: 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.subject-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--color-primary) 28%, transparent);
  box-shadow: var(--shadow);
}

.subject-card i {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  margin-bottom: 30px;
  border-radius: var(--radius);
  color: var(--color-text-on-accent);
  background: linear-gradient(135deg, var(--primary), var(--accent-green));
}

.image-section {
  background: var(--color-surface);
}

.image-grid {
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
}

.image-content {
  max-width: 570px;
}

.image-content .btn {
  margin-top: 26px;
}

.image-frame {
  width: 100%;
  max-height: 500px;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--color-surface);
  box-shadow: var(--shadow);
}

.image-frame img {
  object-fit: cover;
  object-position: center;
}

.cta-section {
  overflow: hidden;
  background:
    radial-gradient(circle at 78% 26%, color-mix(in srgb, var(--color-accent) 16%, transparent), transparent 26%),
    linear-gradient(135deg, var(--color-primary-soft) 0%, var(--color-surface) 64%);
}

.cta-grid {
  grid-template-columns: minmax(0, 1fr) auto;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px;
}

.footer {
  color: var(--color-primary-soft);
  background: var(--color-sidebar);
}

.footer-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(2, minmax(220px, 0.7fr));
  gap: 36px;
  padding: 54px 0 34px;
}

.footer .brand-text strong,
.footer-column h3 {
  color: var(--color-text-inverse);
}

.footer .brand-text span,
.footer-brand p,
.footer-column p {
  color: var(--color-sidebar-text);
}

.footer-brand p {
  max-width: 360px;
  margin: 18px 0 0;
  line-height: 1.6;
}

.footer-column h3 {
  margin: 0 0 16px;
  font-size: 1rem;
}

.footer-column p {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 9px 0;
  line-height: 1.5;
}

.footer-column i {
  color: var(--color-primary);
}

.social-icons {
  display: flex;
  gap: 10px;
}

.social-icons a {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid var(--color-inverse-border);
  border-radius: var(--radius);
  color: var(--color-text-inverse);
  background: var(--color-inverse-highlight);
}

.social-icons a:hover {
  background: var(--color-inverse-border);
}

.footer-bottom {
  width: min(var(--container), calc(100% - 40px));
  min-height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  margin: 0 auto;
  border-top: 1px solid var(--color-inverse-border);
  color: var(--color-sidebar-muted);
  font-size: 0.9rem;
}

.modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: var(--color-backdrop);
  backdrop-filter: blur(8px);
}

.modal.active {
  display: flex;
}

.modal-content {
  position: relative;
  width: min(440px, 100%);
  padding: 28px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--color-surface-elevated);
  box-shadow: var(--shadow-xl);
  animation: modal-in 0.2s ease;
}

.modal-content:focus {
  outline: 0;
}

@keyframes modal-in {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  width: 34px;
  height: 34px;
  border-radius: var(--radius);
  color: var(--muted);
  background: var(--secondary);
  cursor: pointer;
  font-size: 1.35rem;
  line-height: 1;
}

.modal-close:hover {
  color: var(--foreground);
}

.modal-content h2 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 42px 24px 0;
  color: var(--primary-strong);
  font-size: 1.45rem;
}

.modal-content form {
  display: grid;
  gap: 15px;
}

.modal-content form[aria-busy="true"] .input-group {
  opacity: 0.72;
}

.input-group {
  display: grid;
  gap: 7px;
  color: var(--secondary-foreground);
  font-size: 0.88rem;
  font-weight: 700;
}

.input-group span {
  display: block;
}

.input-group {
  position: relative;
}

.input-group i {
  position: absolute;
  left: 13px;
  bottom: 14px;
  color: var(--muted);
  font-size: 0.9rem;
}

.input-group input {
  width: 100%;
  height: 46px;
  padding: 0 14px 0 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--foreground);
  background: var(--color-surface);
}

.input-group input:focus {
  border-color: var(--primary);
}

.form-submit {
  width: 100%;
  margin-top: 4px;
}

.form-submit.is-loading::after {
  width: 16px;
  height: 16px;
  border: 2px solid color-mix(in srgb, currentColor 34%, transparent);
  border-top-color: currentColor;
  border-radius: var(--radius-pill);
  content: "";
  animation: form-spinner 0.7s linear infinite;
}

@keyframes form-spinner {
  to { transform: rotate(360deg); }
}

.form-status {
  min-height: 1.25em;
  margin: -3px 0 0;
  color: var(--color-text-muted);
  font-size: 0.84rem;
  font-weight: 650;
  line-height: 1.35;
}

.form-status[data-kind="success"] { color: var(--color-success); }
.form-status[data-kind="warning"] { color: var(--color-warning); }
.form-status[data-kind="error"] { color: var(--color-danger); }

.switch-form {
  margin: 4px 0 0;
  color: var(--muted);
  text-align: center;
  font-size: 0.92rem;
}

.switch-form button {
  padding: 0;
  border: 0;
  color: var(--primary-strong);
  background: transparent;
  cursor: pointer;
  font: inherit;
  font-weight: 800;
}

.switch-form button:hover {
  text-decoration: underline;
}

.scroll-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 120;
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  box-shadow: var(--shadow-soft);
}

.scroll-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.site-toast {
  position: fixed;
  right: 24px;
  bottom: 82px;
  z-index: 400;
  max-width: min(390px, calc(100% - 32px));
  padding: 13px 15px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  background: var(--color-surface-elevated);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity var(--duration-normal) var(--ease-standard), transform var(--duration-normal) var(--ease-standard);
}

.site-toast.visible {
  opacity: 1;
  transform: translateY(0);
}

.site-toast[data-kind="success"] { border-color: var(--color-success); }
.site-toast[data-kind="warning"] { border-color: var(--color-warning); }
.site-toast[data-kind="error"] { border-color: var(--color-danger); }

.js.landing-ready .reveal,
.js.landing-ready .slide-left,
.js.landing-ready .slide-right {
  opacity: 0;
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.js.landing-ready .reveal {
  transform: translateY(22px);
}

.js.landing-ready .slide-left {
  transform: translateX(-28px);
}

.js.landing-ready .slide-right {
  transform: translateX(28px);
}

.js.landing-ready .reveal.visible,
.js.landing-ready .slide-left.visible,
.js.landing-ready .slide-right.visible {
  opacity: 1;
  transform: translate(0, 0);
}

.seo-hub {
  position: relative;
  z-index: 2;
  margin-top: -28px;
  padding-bottom: 18px;
}

.seo-hub-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.seo-hub-grid a {
  min-height: 118px;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr);
  gap: 10px 12px;
  align-content: center;
  padding: 16px;
  border: 1px solid color-mix(in srgb, var(--color-border) 96%, transparent);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--color-surface) 94%, transparent);
  box-shadow: var(--shadow-soft);
  transition: transform 0.22s ease, border-color 0.22s ease, box-shadow 0.22s ease;
}

.seo-hub-grid a:hover {
  transform: translateY(-3px);
  border-color: color-mix(in srgb, var(--color-primary) 30%, transparent);
  box-shadow: var(--shadow);
}

.seo-hub-grid i {
  grid-row: span 2;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: var(--radius);
  color: var(--color-text-on-accent);
  background: linear-gradient(135deg, var(--primary), var(--accent-green));
}

.seo-hub-grid span {
  min-width: 0;
  color: var(--foreground);
  font-weight: 900;
}

.seo-hub-grid small {
  min-width: 0;
  color: var(--muted);
  line-height: 1.45;
}

.programs-section {
  overflow: hidden;
  background:
    linear-gradient(90deg, color-mix(in srgb, var(--color-primary) 5.5%, transparent) 1px, transparent 1px),
    linear-gradient(0deg, color-mix(in srgb, var(--color-secondary) 5%, transparent) 1px, transparent 1px),
    linear-gradient(180deg, var(--color-surface) 0%, var(--color-surface-subtle) 100%);
  background-size: 32px 32px, 32px 32px, auto;
}

.landing-slider {
  --slider-accent: var(--primary);
  position: relative;
  contain: layout paint;
  overflow: hidden;
  max-width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: color-mix(in srgb, var(--color-surface) 94%, transparent);
  box-shadow: var(--shadow);
}

.slider-topbar {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 18px;
  border-bottom: 1px solid var(--border);
  background: linear-gradient(135deg, color-mix(in srgb, var(--color-primary-soft) 80%, transparent), color-mix(in srgb, var(--color-surface) 96%, transparent));
}

.slider-topbar span {
  display: block;
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.slider-topbar strong {
  display: block;
  margin-top: 3px;
  color: var(--color-primary-hover);
  font-size: 1.2rem;
}

.slider-controls {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.slider-viewport {
  overflow: hidden;
  max-width: 100%;
}

.slider-track {
  width: 100%;
  max-width: 100%;
  position: relative;
  display: block;
  overflow: hidden;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
  scrollbar-width: none;
}

.slider-track::-webkit-scrollbar {
  display: none;
}

.slider-track > article {
  width: 100%;
  min-width: 100%;
  scroll-snap-align: start;
}

.landing-slider.is-ready .slider-track > article {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
}

.landing-slider.is-ready .slider-track > article.active {
  position: relative;
  opacity: 1;
  pointer-events: auto;
  visibility: visible;
}

.program-slide {
  display: grid;
  grid-template-columns: minmax(300px, 0.9fr) minmax(0, 1fr);
  align-items: stretch;
  min-height: 430px;
}

.program-media {
  position: relative;
  height: 430px;
  max-height: 450px;
  overflow: hidden;
  background: var(--color-primary-soft);
  transform: scaleX(-1);
}

.program-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent 0%, color-mix(in srgb, var(--color-sidebar) 22%, transparent) 100%);
}

.program-media img {
  object-fit: cover;
  object-position: center;
}

.program-copy {
  display: grid;
  align-content: center;
  gap: 14px;
  padding: clamp(24px, 4vw, 46px);
}

.program-copy > span {
  width: fit-content;
  padding: 7px 10px;
  border-radius: 999px;
  color: var(--primary-strong);
  background: var(--primary-soft);
  font-size: 0.8rem;
  font-weight: 900;
}

.program-copy h3,
.faq-intro h2 {
  margin: 0;
  color: var(--color-primary-hover);
  font-size: clamp(2rem, 4vw, 2.7rem);
  line-height: 1.08;
}

.program-copy p,
.faq-intro p {
  margin: 0;
  color: var(--muted-foreground);
  font-size: 1.04rem;
  line-height: 1.72;
}

.program-copy ul {
  display: grid;
  gap: 10px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.program-copy li {
  display: flex;
  gap: 10px;
  color: var(--secondary-foreground);
  line-height: 1.45;
  font-weight: 700;
}

.program-copy li::before {
  content: "";
  width: 9px;
  height: 9px;
  flex: 0 0 auto;
  margin-top: 8px;
  border-radius: 50%;
  background: var(--accent-green);
  box-shadow: 0 0 0 5px color-mix(in srgb, var(--color-secondary) 12%, transparent);
}

.slider-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  padding: 14px 18px 18px;
}

.slider-dots button {
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border-radius: 999px;
  background: transparent;
  cursor: pointer;
  transition: width 0.2s ease, background 0.2s ease;
}

.slider-dots button::before {
  content: "";
  width: 34px;
  height: 8px;
  border-radius: 999px;
  background: var(--color-border);
  transition: width 0.2s ease, background 0.2s ease;
}

.slider-dots button.active {
  width: 56px;
}

.slider-dots button.active::before {
  width: 56px;
  background: linear-gradient(90deg, var(--primary), var(--accent-green));
}

.faq-section {
  background: var(--color-surface);
}

.faq-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(420px, 1fr);
  gap: 44px;
  align-items: start;
}

.faq-intro {
  position: sticky;
  top: 110px;
  display: grid;
  gap: 14px;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-list details {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
}

.faq-list summary {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 18px;
  color: var(--foreground);
  cursor: pointer;
  font-weight: 900;
}

.faq-list summary::after {
  content: "+";
  width: 30px;
  height: 30px;
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--primary-strong);
  background: var(--primary-soft);
}

.faq-list details[open] summary::after {
  content: "-";
}

.faq-list p {
  margin: 0;
  padding: 0 18px 18px;
  color: var(--muted-foreground);
  line-height: 1.66;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

@media (max-width: 1320px) and (min-width: 1121px) {
  .header-shell {
    gap: 12px;
  }

  .brand-text span {
    display: none;
  }

  .main-nav a {
    padding: 0 9px;
    font-size: 0.88rem;
  }

  .header-actions {
    gap: 8px;
  }

  .header-actions .btn {
    padding: 0 14px;
  }
}

@media (max-width: 1120px) {
  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: inline-grid;
  }

  .main-nav.show,
  .header-actions.show {
    position: fixed;
    left: 20px;
    right: 20px;
    z-index: 180;
    display: grid;
    border-radius: var(--radius);
    background: var(--color-surface);
    box-shadow: var(--shadow);
  }

  .main-nav.show {
    top: calc(var(--landing-header-height) + 8px);
    gap: 4px;
    max-height: calc(100dvh - var(--landing-header-height) - 170px);
    overflow-y: auto;
    padding: 10px;
  }

  .main-nav.show a {
    justify-content: flex-start;
    min-height: 46px;
  }

  .header-actions {
    display: none;
  }

  .header-actions.show {
    top: calc(var(--landing-header-height) + var(--landing-mobile-nav-height) + 16px);
    grid-template-columns: 1fr 1fr;
    padding: 10px;
  }

  .site-language-switcher {
    margin-left: auto;
  }

  .hero-grid,
  .platform-grid,
  .image-grid,
  .cta-grid,
  .program-slide,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    gap: 40px;
  }

  .hero-slide {
    min-height: 0;
    padding: 56px 0 38px;
  }

  .hero-copy,
  .platform-content,
  .image-content {
    max-width: none;
  }

  .platform-media {
    order: 2;
  }

  .platform-content {
    order: 1;
  }

  .hero-visual {
    max-width: 520px;
    justify-self: center;
  }

  .cta-actions {
    justify-content: flex-start;
  }

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

  .program-media {
    height: 360px;
  }

  .faq-intro {
    position: static;
  }
}

@media (max-width: 900px) {
  .section {
    padding: 72px 0;
  }

  .hero-slide {
    padding-top: 50px;
  }

  .steps-grid,
  .subjects-grid,
  .seo-hub-grid,
  .footer-shell {
    grid-template-columns: 1fr;
  }

  .footer-bottom {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    padding: 18px 0;
  }

  .hero-slide-title {
    font-size: clamp(2.55rem, 7vw, 3.2rem);
  }

  .section-heading h2,
  .platform-content h2,
  .image-content h2,
  .cta-section h2,
  .program-copy h3,
  .faq-intro h2 {
    font-size: 2.35rem;
  }

}

@media (max-width: 680px) {
  .section-shell,
  .header-shell,
  .footer-shell,
  .footer-bottom {
    width: min(100% - 28px, var(--container));
  }

  .header-shell {
    min-height: 68px;
    gap: 8px;
  }

  .site-header.is-scrolled .header-shell {
    min-height: 64px;
  }

  .site-toast {
    right: 14px;
    bottom: 76px;
    max-width: calc(100% - 28px);
  }

  .brand-text span {
    display: none;
  }

  .site-language-switcher {
    grid-template-columns: repeat(2, 44px);
  }

  .daily-phrase-box {
    max-height: calc(4.35em + 20px);
    padding: 9px 14px;
    font-size: 0.88rem;
    white-space: normal;
  }

  .hero-slide {
    padding: 42px 0 30px;
  }

  .hero-grid {
    gap: 30px;
  }

  .hero-slide-title {
    margin: 15px 0 15px;
    font-size: clamp(2.05rem, 10vw, 2.75rem);
    line-height: 1.08;
  }

  .section-heading h2,
  .platform-content h2,
  .image-content h2,
  .cta-section h2,
  .program-copy h3,
  .faq-intro h2 {
    font-size: 2.05rem;
  }

  .hero-slide-lead,
  .section-heading p,
  .platform-content p,
  .image-content p,
  .cta-section p,
  .program-copy p,
  .faq-intro p {
    font-size: 1rem;
  }

  .hero-slide-lead {
    line-height: 1.62;
  }

  .hero-slide-actions,
  .cta-actions {
    display: grid;
  }

  .hero-slide-actions .btn,
  .cta-actions .btn {
    width: 100%;
  }

  .hero-trust-list {
    gap: 8px;
    margin-top: 18px;
  }

  .hero-trust-item {
    min-height: 40px;
    padding: 7px 10px;
    font-size: 0.8rem;
  }

  .hero-media-frame {
    width: 100%;
    height: clamp(280px, 74vw, 360px);
    aspect-ratio: auto;
    border-radius: var(--radius-lg);
  }

  .hero-media-frame::before {
    inset: 9px;
    border-radius: var(--radius-md);
  }

  .hero-media-frame img,
  .hero-slide-theme-ai .hero-media-frame img,
  .hero-slide-theme-materials .hero-media-frame img {
    object-position: 50% 38%;
  }

  .hero-media-card {
    bottom: 14px;
    left: 14px;
    width: min(320px, calc(100% - 28px));
    padding: 13px;
    border-radius: var(--radius-md);
  }

  .hero-carousel-navigation {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 10px;
    padding-bottom: 28px;
  }

  .hero-carousel-dots {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .hero-carousel-toggle {
    grid-column: 2;
    grid-row: 1;
  }

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

  .seo-hub {
    margin-top: 0;
    padding-top: 16px;
  }

  .seo-hub-grid a {
    grid-template-columns: 38px minmax(0, 1fr);
    min-height: 106px;
    padding: 14px;
  }

  .program-slide {
    min-height: auto;
  }

  .program-media {
    height: 280px;
  }

  .slider-topbar {
    align-items: flex-start;
    flex-direction: column;
  }

  .slider-controls {
    width: 100%;
    justify-content: space-between;
  }

  .modal {
    align-items: flex-start;
    overflow: auto;
  }

  .modal-content {
    margin-top: 18px;
    padding: 22px;
  }

  .header-actions.show {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 390px) {
  .hero-slide {
    padding: 36px 0 26px;
  }

  .hero-slide-title {
    font-size: clamp(2.05rem, 10vw, 2.4rem);
    line-height: 1.06;
  }

  .hero-grid {
    gap: 28px;
  }

  .hero-media-frame {
    height: 280px;
  }

  .brand-text {
    display: none;
  }

  .site-language-switcher {
    grid-template-columns: repeat(2, 44px);
  }

  .site-language-switcher button {
    min-height: 44px;
  }

  .site-theme-toggle,
  .menu-toggle {
    width: 44px;
    height: 44px;
  }
}