:root {
  color-scheme: light dark;
  --bg: #ffffff;
  --bg-soft: #f5f5f7;
  --bg-deep: #fbfbfd;
  --ink: #1d1d1f;
  --muted: #6e6e73;
  --line: rgba(0, 0, 0, 0.08);
  --link: #0066cc;
  --link-hover: #0077ed;
  --teal: #0f766e;
  --teal-deep: #0b5a54;
  --btn: #0f766e;
  --btn-hover: #0b5a54;
  --btn-active: #084843;
  --nav-bg: rgba(255, 255, 255, 0.72);
  --nav-bg-scrolled: rgba(255, 255, 255, 0.82);
  --card: #ffffff;
  --radius: 28px;
  --font-sf: "SF Pro Display", "SF Pro Text", "SF Pro", -apple-system, BlinkMacSystemFont;
  --font-cjk: "PingFang SC", "PingFang HK";
  --font-display: var(--font-sf), var(--font-cjk), sans-serif;
  --font-sans: var(--font-sf), var(--font-cjk), sans-serif;
  --max: 1120px;
  --pad: clamp(1.25rem, 4vw, 2.5rem);
  --page-pad-inline-start: max(var(--pad), env(safe-area-inset-left, 0px));
  --page-pad-inline-end: max(var(--pad), env(safe-area-inset-right, 0px));
  --focus: #005eb8;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --bg-soft: #161617;
    --bg-deep: #0b0b0c;
    --ink: #f5f5f7;
    --muted: #a1a1a6;
    --line: rgba(255, 255, 255, 0.12);
    --link: #2997ff;
    --link-hover: #6cb6ff;
    --teal: #2dd4bf;
    --teal-deep: #5eead4;
    --btn: #0f766e;
    --btn-hover: #14b8a6;
    --btn-active: #0d9488;
    --nav-bg: rgba(22, 22, 23, 0.72);
    --nav-bg-scrolled: rgba(22, 22, 23, 0.88);
    --card: #1c1c1e;
    --focus: #7cc4ff;
  }

  .site-nav a:hover,
  .menu-toggle:hover {
    background: rgba(255, 255, 255, 0.08);
  }

  .btn.ghost {
    border-color: rgba(255, 255, 255, 0.18);
  }

  .btn.ghost:hover {
    background: rgba(45, 212, 191, 0.12);
  }

  .path-card:hover,
  .day-card:hover,
  .lesson-card:hover {
    background: #222224;
  }

  img {
    opacity: 0.96;
  }
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.5;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body.is-nav-open {
  overflow: hidden;
}

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

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

.copy-unit {
  word-break: normal;
  line-break: strict;
  overflow-wrap: break-word;
}

.hero h1 .copy-unit {
  display: inline;
  white-space: nowrap;
}

html[data-locale="en"] .hero h1 .copy-unit {
  white-space: normal;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 1000;
  padding: 0.75rem 1rem;
  background: var(--ink);
  color: var(--bg);
  border-radius: 0 0 8px 0;
}

.skip-link:focus {
  left: 0;
}

.page-shell {
  width: min(100%, var(--max));
  margin-inline: auto;
  padding-inline: var(--page-pad-inline-start) var(--page-pad-inline-end);
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  min-height: 3.25rem;
  padding: 0.55rem var(--page-pad-inline-end) 0.55rem var(--page-pad-inline-start);
  background: var(--nav-bg);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.site-nav.is-scrolled {
  background: var(--nav-bg-scrolled);
  border-bottom-color: var(--line);
}

.brand-lockup {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  min-width: 0;
  border-radius: 999px;
  padding: 0.2rem 0.45rem 0.2rem 0.2rem;
}

.brand-lockup:hover {
  background: rgba(0, 0, 0, 0.04);
}

.brand-lockup img {
  flex: 0 0 auto;
  width: 30px;
  height: 29px;
}

.brand-company {
  font-size: 0.92rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.brand-separator {
  color: var(--muted);
  opacity: 0.55;
}

.brand-product {
  font-size: 0.82rem;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.brand-product span {
  color: var(--ink);
  font-weight: 600;
}

.menu-toggle {
  display: none;
  padding: 0.45rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--line);
}

.product-nav {
  display: flex;
  align-items: center;
  gap: 0.35rem 1.1rem;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.product-nav a {
  font-size: 0.9rem;
  color: var(--muted);
  border-radius: 999px;
  padding: 0.3rem 0.45rem;
}

.product-nav a:hover {
  color: var(--ink);
  background: rgba(0, 0, 0, 0.04);
}

.product-nav .nav-cta {
  color: #fff;
  background: var(--btn);
  padding: 0.4rem 0.9rem;
  font-weight: 600;
}

.product-nav .nav-cta:hover {
  background: var(--btn-hover);
  color: #fff;
}

.lang-switch {
  display: inline-flex;
  align-items: stretch;
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
  background: color-mix(in srgb, var(--bg) 80%, transparent);
}

.lang-opt {
  appearance: none;
  border: 0;
  margin: 0;
  padding: 0.45rem 0.65rem;
  min-width: 2.4rem;
  min-height: 2.4rem;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  line-height: 1.2;
  transition: background 0.2s ease, color 0.2s ease;
}

.lang-opt + .lang-opt {
  border-left: 1px solid var(--line);
}

.lang-opt:hover {
  color: var(--ink);
  background: color-mix(in srgb, var(--ink) 5%, transparent);
}

.lang-opt.is-active {
  color: #fff;
  background: var(--btn);
}

html[data-locale="zh-Hant"] {
  --font-cjk: "PingFang HK", "PingFang SC";
  --font-display: var(--font-sf), var(--font-cjk), sans-serif;
  --font-sans: var(--font-sf), var(--font-cjk), sans-serif;
}

.hero {
  position: relative;
  min-height: calc(100svh - 3.25rem);
  display: grid;
  align-content: end;
  justify-items: stretch;
  padding: clamp(3rem, 8vw, 5.5rem) var(--page-pad-inline-end) clamp(2.5rem, 6vw, 4rem) var(--page-pad-inline-start);
  overflow: hidden;
  isolation: isolate;
  text-align: left;
}

.hero-background {
  position: absolute;
  inset: 0;
  z-index: -2;
}

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

.hero-background img {
  object-fit: cover;
  object-position: center 45%;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.18) 0%, rgba(255, 255, 255, 0.72) 48%, var(--bg) 92%),
    linear-gradient(90deg, rgba(255, 255, 255, 0.55) 0%, rgba(255, 255, 255, 0.08) 55%, transparent 100%);
  pointer-events: none;
}

@media (prefers-color-scheme: dark) {
  .hero::before {
    background:
      linear-gradient(180deg, rgba(0, 0, 0, 0.35) 0%, rgba(0, 0, 0, 0.72) 52%, var(--bg) 94%),
      linear-gradient(90deg, rgba(0, 0, 0, 0.55) 0%, rgba(0, 0, 0, 0.12) 55%, transparent 100%);
  }
}

.hero > .page-shell {
  width: min(100%, var(--max));
  margin-inline: auto;
  padding-inline: 0;
}

.hero-copy {
  width: min(100%, 40rem);
  max-width: 40rem;
  margin: 0;
  text-align: left;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-copy > * {
  width: 100%;
  max-width: 40rem;
  text-align: left;
}

.eyebrow {
  margin: 0 0 0.85rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal);
  text-align: left;
}

.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2.35rem, 6.2vw, 4.2rem);
  line-height: 1.12;
  letter-spacing: -0.035em;
  font-weight: 700;
  text-align: left;
  text-wrap: balance;
}

.hero h1 em {
  font-style: normal;
  color: var(--teal);
}

.hero-lede {
  margin: 1.15rem 0 0;
  max-width: 36rem;
  font-size: clamp(1.02rem, 2.1vw, 1.22rem);
  line-height: 1.6;
  color: var(--muted);
  text-align: left;
  text-wrap: pretty;
}

.hero-lede .copy-unit {
  display: inline;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1.75rem;
  width: 100%;
}

.hero .stat-row {
  width: 100%;
  max-width: 36rem;
  margin-top: 2rem;
  text-align: left;
  justify-items: start;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  min-height: 2.85rem;
  padding: 0.7rem 1.25rem;
  border-radius: 980px;
  font-size: 1rem;
  font-weight: 600;
  transition: background 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn.primary {
  background: var(--btn);
  color: #fff;
}

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

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

.btn.ghost {
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
}

.btn.ghost:hover {
  background: rgba(15, 118, 110, 0.08);
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.75rem;
  margin-top: 2rem;
  max-width: 36rem;
}

.stat-row div {
  padding: 0.85rem 0.2rem 0;
  border-top: 1px solid var(--line);
}

.stat-row dt {
  margin: 0;
  font-size: 0.75rem;
  color: var(--muted);
}

.stat-row dd {
  margin: 0.2rem 0 0;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.stat-row dd span {
  margin-left: 0.15rem;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--muted);
}

.section {
  padding: clamp(3.5rem, 8vw, 6rem) 0;
}

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

.section-head {
  max-width: 40rem;
  margin-bottom: clamp(2rem, 5vw, 3rem);
}

.section-kicker {
  margin: 0 0 0.65rem;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--teal);
}

.section-head h2,
.section h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(1.85rem, 4.2vw, 2.75rem);
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.section-head > p:last-child,
.section-support {
  margin: 0.9rem 0 0;
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 36rem;
}

.path-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.25rem;
}

.path-card {
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  min-height: 100%;
  padding: clamp(1.4rem, 3vw, 2rem);
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.path-card:hover {
  border-color: rgba(15, 118, 110, 0.35);
  transform: translateY(-2px);
}

.path-card .path-kicker {
  margin: 0;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--teal);
}

.path-card h3 {
  margin: 0;
  font-size: clamp(1.35rem, 2.5vw, 1.7rem);
  letter-spacing: -0.025em;
  line-height: 1.2;
}

.path-card p {
  margin: 0;
  color: var(--muted);
  flex: 1;
}

.path-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 0.9rem;
  color: var(--ink);
}

.path-meta li::before {
  content: "";
  display: inline-block;
  width: 0.35rem;
  height: 0.35rem;
  margin-right: 0.45rem;
  border-radius: 50%;
  background: var(--teal);
  vertical-align: 0.15em;
}

.path-card .text-link {
  margin-top: 0.35rem;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--link);
  font-weight: 600;
}

.text-link:hover {
  color: var(--link-hover);
}

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

.principle-grid article,
.principle-grid > p {
  margin: 0;
  padding: 1.35rem 1.2rem;
  border-radius: 22px;
  background: var(--card);
  border: 1px solid var(--line);
}

.principle-grid span {
  display: block;
  margin-bottom: 0.55rem;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--teal);
}

.principle-grid strong {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 1.1rem;
  letter-spacing: -0.02em;
}

.principle-grid small {
  display: block;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.45;
}

.stage-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

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

.stage-card {
  padding: 1.5rem 1.25rem;
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
}

.stage-card > span {
  display: block;
  margin-bottom: 0.7rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--teal);
}

.stage-card strong {
  display: block;
  margin-bottom: 0.55rem;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.stage-card p {
  margin: 0 0 0.85rem;
  color: var(--muted);
}

.stage-card em {
  font-style: normal;
  font-size: 0.9rem;
  color: var(--ink);
}

.media-panel {
  margin: 0 0 clamp(2rem, 5vw, 3rem);
  border-radius: calc(var(--radius) + 4px);
  overflow: hidden;
  background: var(--bg-soft);
}

.media-panel img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.lesson-stage {
  margin-bottom: 2.5rem;
}

.lesson-stage:last-child {
  margin-bottom: 0;
}

.lesson-stage-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  margin-bottom: 1rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--line);
}

.lesson-stage-head h3 {
  margin: 0;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
}

.lesson-stage-head span {
  color: var(--muted);
  font-size: 0.92rem;
}

.lesson-list {
  display: grid;
  gap: 0.85rem;
}

.lesson-card {
  display: grid;
  grid-template-columns: 3.5rem minmax(0, 1fr);
  gap: 0.85rem 1rem;
  padding: 1.15rem 1.2rem;
  border-radius: 20px;
  background: var(--card);
  border: 1px solid var(--line);
}

.lesson-num {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--teal);
}

.lesson-card h4 {
  margin: 0 0 0.55rem;
  font-size: 1.05rem;
  letter-spacing: -0.015em;
  line-height: 1.3;
}

.lesson-card ul {
  margin: 0 0 0.65rem;
  padding-left: 1.1rem;
  color: var(--muted);
}

.lesson-card li + li {
  margin-top: 0.25rem;
}

.lesson-output {
  margin: 0;
  font-size: 0.92rem;
  color: var(--ink);
}

.lesson-output span {
  color: var(--muted);
}

.lesson-duration {
  margin: 0.55rem 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.day-grid {
  display: grid;
  gap: 1.15rem;
}

.day-card {
  padding: clamp(1.4rem, 3vw, 2rem);
  border-radius: var(--radius);
  background: var(--card);
  border: 1px solid var(--line);
}

.day-header {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 0.9rem;
}

.day-header > p {
  margin: 0;
  min-width: 4.25rem;
  text-align: center;
}

.day-header > p span {
  display: block;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.day-header > p strong {
  display: block;
  font-size: 2rem;
  letter-spacing: -0.04em;
  line-height: 1;
  color: var(--teal);
}

.day-header small {
  display: block;
  margin-bottom: 0.25rem;
  color: var(--muted);
  font-size: 0.85rem;
}

.day-header h3 {
  margin: 0;
  font-size: clamp(1.25rem, 2.4vw, 1.55rem);
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.day-purpose {
  margin: 0 0 1rem;
  color: var(--muted);
}

.outline-block h4 {
  margin: 0 0 0.55rem;
  font-size: 0.9rem;
  letter-spacing: 0.02em;
}

.outline-block ul {
  margin: 0;
  padding-left: 1.15rem;
  color: var(--muted);
}

.outline-block li + li {
  margin-top: 0.35rem;
}

.day-outcome {
  margin-top: 1.15rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.day-outcome span {
  display: block;
  margin-bottom: 0.35rem;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--teal);
}

.day-outcome p {
  margin: 0;
  font-size: 1rem;
}

.contact-plane {
  text-align: center;
  padding: clamp(2.5rem, 6vw, 4rem) 1rem;
  border-radius: calc(var(--radius) + 8px);
  background:
    radial-gradient(circle at 50% 0%, rgba(15, 118, 110, 0.12), transparent 55%),
    var(--bg-soft);
}

.contact-plane h2 {
  margin: 0;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  letter-spacing: -0.03em;
}

.contact-plane p {
  margin: 0.85rem auto 0;
  max-width: 28rem;
  color: var(--muted);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem 1.5rem;
  margin-top: 1.5rem;
}

.footer {
  padding: 0;
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
  color: #6e6e73;
  font-size: 0.75rem;
  line-height: 1.33337;
}

.footer-inner {
  max-width: 980px;
  margin: 0 auto;
  padding:
    1.25rem
    var(--page-pad-inline-end)
    max(1.75rem, calc(1rem + env(safe-area-inset-bottom, 0px)))
    var(--page-pad-inline-start);
}

.footer-dir {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.25rem 2rem;
  padding: 0.35rem 0 1.25rem;
  border-bottom: 1px solid var(--line);
}

.footer-col {
  display: grid;
  gap: 0.15rem;
  align-content: start;
}

.footer-col-title {
  margin: 0 0 0.2rem;
}

.footer-col h3 {
  margin: 0 0 0.2rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
}

.footer-col-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  margin: 0;
  padding: 0;
  border: 0;
  background: none;
  font: inherit;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--ink);
  letter-spacing: -0.01em;
  line-height: 1.33337;
  text-align: left;
  cursor: default;
  -webkit-tap-highlight-color: transparent;
}

.footer-col-toggle::after {
  content: none;
}

.footer-col-panel {
  display: grid;
  gap: 0.15rem;
}

.footer-col a {
  color: #6e6e73;
  font-size: 0.75rem;
  font-weight: 400;
  width: fit-content;
  min-height: 0;
  padding: 0.2rem 0;
  line-height: 1.35;
  display: inline-flex;
  align-items: center;
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
  text-decoration: none;
}

.footer-col a:hover {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.footer-legal {
  padding-top: 0.85rem;
  display: grid;
  gap: 0.18rem;
}

.footer-lang {
  margin-bottom: 0.4rem;
}

.footer-lang .lang-opt {
  min-width: 2.25rem;
  min-height: 2rem;
  padding: 0.32rem 0.55rem;
}

.footer-legal p {
  margin: 0;
  color: #6e6e73;
  font-size: 0.75rem;
  max-width: 52rem;
  line-height: 1.35;
}

.footer-beian {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

.footer-beian:hover {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 2px;
}

@media (prefers-color-scheme: dark) {
  .footer {
    color: #a1a1a6;
  }

  .footer-col a {
    color: #a1a1a6;
  }

  .footer-col a:hover,
  .footer-col h3,
  .footer-col-toggle {
    color: var(--ink);
  }

  .footer-col-toggle::after {
    color: #a1a1a6;
  }

  .footer-legal p {
    color: #86868b;
  }
}

.reveal {
  opacity: 1;
  transform: none;
}

.js .reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.js .reveal.is-in {
  opacity: 1;
  transform: none;
}

.js .reveal.delay-1 {
  transition-delay: 0.08s;
}

.js .reveal.delay-2 {
  transition-delay: 0.16s;
}

.js .reveal.delay-3 {
  transition-delay: 0.24s;
}

@media (prefers-reduced-motion: reduce) {
  .js .reveal,
  .path-card {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
}

@media (max-width: 920px) {
  .path-grid,
  .principle-grid,
  .stage-grid {
    grid-template-columns: 1fr;
  }

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

  .footer-dir {
    grid-template-columns: 1fr;
    gap: 0;
    padding: 0;
  }

  .footer-col {
    gap: 0;
    border-bottom: 1px solid var(--line);
  }

  .footer-col:last-child {
    grid-column: auto;
  }

  .footer-col-title {
    margin: 0;
  }

  .footer-col-toggle {
    min-height: 2.75rem;
    padding: 0.65rem 0;
    font-size: 0.75rem;
    cursor: pointer;
  }

  .footer-col-toggle::after {
    content: "+";
    flex: 0 0 auto;
    margin-inline-start: 0.75rem;
    font-size: 1.35rem;
    font-weight: 300;
    line-height: 1;
    color: #6e6e73;
  }

  .footer-col.is-open .footer-col-toggle::after {
    content: "−";
  }

  .footer-col-panel {
    display: none;
    gap: 0;
    padding: 0 0 0.75rem;
  }

  .footer-col.is-open .footer-col-panel {
    display: grid;
  }

  .footer-col a {
    font-size: 0.8125rem;
    padding: 0.18rem 0;
    min-height: 1.75rem;
    line-height: 1.25;
  }

  .footer-inner {
    padding-top: 0.85rem;
  }

  .footer-legal {
    padding-top: 0.55rem;
    gap: 0.08rem;
  }

  .footer-lang {
    margin-bottom: 0.28rem;
  }

  .footer-lang .lang-opt {
    min-width: 2.5rem;
    min-height: 2.25rem;
  }

  .footer-legal p {
    font-size: 0.75rem;
    line-height: 1.3;
  }
}

@media (max-width: 720px) {
  .menu-toggle {
    display: inline-flex;
  }

  .product-nav {
    display: none;
    position: absolute;
    top: calc(100% + 1px);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0.25rem;
    padding: 0.85rem var(--pad) 1.1rem;
    background: var(--nav-bg-scrolled);
    border-bottom: 1px solid var(--line);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
  }

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

  .brand-product {
    display: none;
  }

  .brand-separator {
    display: none;
  }

  .hero {
    min-height: calc(100svh - 3.25rem);
    padding-top: 2.75rem;
    padding-bottom: 2.25rem;
    align-content: end;
  }

  .hero h1 {
    font-size: clamp(2.05rem, 9.2vw, 2.75rem);
    line-height: 1.15;
  }

  .hero-lede {
    font-size: 1.02rem;
    line-height: 1.58;
    max-width: 28rem;
  }

  .hero-actions {
    width: 100%;
  }

  .hero-actions .btn {
    min-height: 2.85rem;
  }

  .lesson-card {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }
}

@media (max-width: 420px) {
  .stat-row {
    grid-template-columns: 1fr 1fr;
    gap: 0.65rem;
  }

  .stat-row dd {
    font-size: 1.2rem;
  }

  .hero h1 {
    font-size: clamp(1.95rem, 9.5vw, 2.35rem);
  }

  .hero h1 .copy-unit {
    white-space: normal;
  }

  html[data-locale="zh-Hans"] .hero h1 .copy-unit,
  html[data-locale="zh-Hant"] .hero h1 .copy-unit {
    white-space: nowrap;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 340px) {
  html[data-locale="zh-Hans"] .hero h1 .copy-unit,
  html[data-locale="zh-Hant"] .hero h1 .copy-unit {
    white-space: normal;
  }
}

@media (horizontal-viewport-segments: 2), (spanning: single-fold-vertical) {
  .hero-copy {
    max-width: min(40rem, 46vw);
  }

  .hero > .page-shell {
    width: min(100%, var(--max));
  }
}