:root {
  --ink: #18202a;
  --muted: #52606d;
  --paper: #fbfaf7;
  --card: #ffffff;
  --line: #e6e2da;
  --accent: #365f98;
  --accent-dark: #284c7d;
  --soft: #eef3f8;
  --soft-blue: #e7eef6;
  --max: 1180px;
  --radius: 18px;
  --shadow: 0 14px 40px rgba(24, 32, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Arial Narrow", "Aptos Narrow", Arial, sans-serif;
  font-size: 17px;
  line-height: 1.65;
}

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

a {
  color: inherit;
}

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

button,
.btn {
  cursor: pointer;
}

:focus-visible {
  outline: 3px solid rgba(75, 120, 184, 0.45);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1001;
  padding: 10px 14px;
  color: #fff;
  background: var(--ink);
  border-radius: 8px;
  transform: translateY(-150%);
}

.skip-link:focus {
  transform: translateY(0);
}

.wrap {
  width: min(100% - 48px, var(--max));
  margin-inline: auto;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(251, 250, 247, 0.86);
  border-bottom: 1px solid rgba(230, 226, 218, 0.72);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  transition: background 0.25s ease, box-shadow 0.25s ease;
}

.nav.is-scrolled {
  background: rgba(251, 250, 247, 0.76);
  box-shadow: 0 8px 24px rgba(24, 32, 42, 0.06);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 88px;
  padding-block: 8px;
  transition: min-height 0.25s ease, padding 0.25s ease;
}

.nav.is-scrolled .nav-inner {
  min-height: 66px;
  padding-block: 5px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  text-decoration: none;
}

.brand-logo img {
  width: 72px;
  height: 72px;
  object-fit: contain;
  border-radius: 50%;
  transition: width 0.25s ease, height 0.25s ease;
}

.nav.is-scrolled .brand-logo img {
  width: 48px;
  height: 48px;
}

.brand-logo span {
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 17px;
  font-size: 0.95rem;
}

.nav-links a {
  color: #38434f;
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--accent);
}

.nav-links .nav-cta {
  padding: 10px 15px;
  color: #fff;
  background: var(--ink);
  border-radius: 999px;
  font-weight: 700;
}

.menu-toggle {
  display: none;
  min-height: 40px;
  padding: 0 14px;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--ink);
  border-radius: 999px;
  font-weight: 700;
}

main > section {
  border-top: 1px solid var(--line);
}

main > section:first-child {
  border-top: 0;
}

section {
  padding: 76px 0;
  scroll-margin-top: 86px;
}

.hero {
  padding: 92px 0 82px;
}

.hero-grid,
.about-grid,
.content-split {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(260px, 0.65fr);
  align-items: center;
  gap: 54px;
}

.eyebrow,
.section-kicker,
.card-kicker,
.breadcrumb {
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.11em;
  line-height: 1.35;
  text-transform: uppercase;
}

.eyebrow,
.section-kicker {
  margin-bottom: 12px;
}

h1,
h2,
h3 {
  font-family: "Arial Narrow", "Aptos Narrow", Arial, sans-serif;
}

h1 {
  max-width: 980px;
  margin: 0 0 22px;
  font-size: clamp(2.7rem, 6.4vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.045em;
}

h2 {
  margin: 0 0 14px;
  font-size: clamp(2.15rem, 4vw, 3.35rem);
  line-height: 1.05;
  letter-spacing: -0.03em;
}

h3 {
  margin: 0 0 10px;
  font-size: 1.55rem;
  line-height: 1.15;
}

p {
  margin-top: 0;
}

.hero-brandline {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 0.98rem;
}

.lead,
.hero-copy {
  max-width: 880px;
  color: #45515e;
  font-size: 1.18rem;
  line-height: 1.65;
}

.credential-row {
  display: flex;
  flex-wrap: wrap;
  gap: 9px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.credential-row li {
  padding: 8px 12px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 999px;
  color: #45515e;
  font-size: 0.9rem;
  font-weight: 700;
}

.hero-actions,
.card-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 18px;
  border: 1px solid var(--ink);
  border-radius: 999px;
  font-weight: 700;
  text-decoration: none;
}

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

.btn-secondary {
  color: var(--ink);
  background: transparent;
}

.about-photo {
  display: flex;
  justify-content: center;
}

.about-photo img {
  width: 250px;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: 28px;
  box-shadow: 0 16px 42px rgba(24, 32, 42, 0.12);
}

.section-head {
  max-width: 860px;
  margin-bottom: 34px;
}

.section-head p {
  color: var(--muted);
  font-size: 1.06rem;
}

.service-grid,
.rate-grid,
.review-grid,
.related-grid {
  display: grid;
  gap: 20px;
}

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

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

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

.service-card,
.rate-card,
.review-card,
.related-card,
.content-card,
.faq details {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.service-card,
.rate-card,
.related-card,
.content-card {
  padding: 28px;
}

.service-card.primary {
  background: var(--soft-blue);
  border-color: rgba(75, 120, 184, 0.32);
}

.service-card p,
.rate-card p,
.related-card p,
.content-card p {
  color: var(--muted);
}

.service-card ul,
.content-card ul {
  margin-bottom: 0;
  padding-left: 19px;
}

.service-card li,
.content-card li {
  margin: 6px 0;
}

.audience-group {
  margin-top: 24px;
}

.audience-group + .audience-group {
  padding-top: 24px;
  border-top: 1px solid rgba(75, 120, 184, 0.28);
}

.audience-group h4 {
  margin: 0 0 10px;
  color: var(--ink);
  font-size: 1.08rem;
  line-height: 1.3;
}

.audience-group p {
  margin-bottom: 12px;
}

.audience-group .audience-list {
  margin: 14px 0 18px;
  padding-left: 20px;
}

.audience-list li {
  margin: 7px 0;
}

.audience-group .text-link {
  display: inline-block;
}

.text-link {
  color: var(--accent-dark);
  font-weight: 800;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.additional-tuition {
  margin-top: 24px;
  padding: 30px;
  background: rgba(255, 255, 255, 0.6);
  border: 1px solid var(--line);
  border-radius: 22px;
}

.additional-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.additional-grid article {
  padding-top: 16px;
  border-top: 2px solid var(--line);
}

.additional-grid p {
  margin-bottom: 0;
  color: var(--muted);
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.method-card {
  padding-top: 17px;
  border-top: 2px solid var(--ink);
}

.method-card strong {
  display: block;
  margin-bottom: 10px;
  font-size: 1.08rem;
}

.method-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.rate-price {
  display: flex;
  align-items: baseline;
  gap: 7px;
  margin: 14px 0 12px;
  color: var(--accent);
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
}

.rate-price span {
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 700;
}

.price-cta {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 18px;
  margin-top: 20px;
  padding: 22px 24px;
  background: var(--soft);
  border-radius: 16px;
}

.price-cta span {
  color: var(--muted);
}

.reviews-section {
  background: #f2f6fa;
}

.review-summary {
  display: grid;
  grid-template-columns: minmax(280px, 0.75fr) minmax(0, 1.25fr);
  gap: 20px;
  margin-bottom: 20px;
}

.rating-panel {
  padding: 26px;
  color: #fff;
  background: var(--ink);
  border-radius: var(--radius);
}

.review-total {
  display: flex;
  align-items: baseline;
  gap: 9px;
  margin: 12px 0 18px;
}

.review-total strong {
  font-size: 2.7rem;
  line-height: 1;
}

.review-total span,
.rating-panel p {
  color: #d8e1ea;
}

.rating-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.rating-card {
  padding: 15px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 12px;
}

.rating-card strong {
  display: block;
  margin-bottom: 7px;
  font-size: 1.9rem;
  line-height: 1;
}

.rating-card span {
  color: #d8e1ea;
  font-size: 0.86rem;
}

.rating-panel {
  color: var(--ink);
  background: var(--soft-blue);
  border: 1px solid rgba(75, 120, 184, 0.32);
}

.rating-panel .section-kicker {
  color: var(--accent-dark);
}

.review-total strong {
  color: var(--accent-dark);
}

.review-total span,
.rating-panel p {
  color: #45515e;
}

.rating-card {
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid rgba(75, 120, 184, 0.25);
}

.rating-card strong {
  color: var(--accent-dark);
}

.rating-card span {
  color: var(--muted);
}

.review-context {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 28px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.review-context p:last-child {
  margin-bottom: 0;
  color: var(--muted);
}

.review-card {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  min-height: 0;
  padding: 22px;
  box-shadow: 0 8px 24px rgba(24, 32, 42, 0.04);
}

.review-card p {
  margin-bottom: 22px;
  font-size: 1.08rem;
  line-height: 1.55;
}

.review-card footer {
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 700;
}
.review-card {
  justify-content: flex-start;
}

.review-card h3 {
  margin: 0 0 12px;
  color: var(--accent-dark);
  font-size: 1.25rem;
}

.review-card p {
  flex-grow: 0;
  margin-bottom: 14px;
}

.review-card footer {
  margin-top: 0;
  padding-top: 0;
}

.review-card-feature {
  grid-column: auto;
  min-height: 0;
}

.review-card-feature .text-link {
  align-self: flex-start;
  margin-top: 18px;
}

.review-disclosure {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 0.86rem;
}

.contact-section {
  background: var(--paper);
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 48px;
  align-items: start;
}

.contact-copy {
  position: sticky;
  top: 100px;
}

.contact-copy p {
  color: var(--muted);
}

.contact-form {
  padding: 30px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 22px;
  box-shadow: var(--shadow);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.form-field {
  display: grid;
  gap: 7px;
}

.form-field.full {
  grid-column: 1 / -1;
}

.form-field label,
.form-legend {
  font-size: 0.9rem;
  font-weight: 800;
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  padding: 12px 13px;
  color: var(--ink);
  background: #fff;
  border: 1px solid #cfd5dc;
  border-radius: 10px;
}

.form-field textarea {
  min-height: 132px;
  resize: vertical;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--accent);
  outline: 3px solid rgba(75, 120, 184, 0.16);
}

.form-note,
.privacy-note {
  color: var(--muted);
  font-size: 0.84rem;
}

.privacy-note {
  margin: 18px 0;
}

.privacy-note a {
  color: var(--accent-dark);
  font-weight: 700;
}

.hidden-field {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.page-hero {
  padding: 72px 0 62px;
  background: linear-gradient(180deg, rgba(231, 238, 246, 0.78), rgba(251, 250, 247, 0));
}

.page-hero h1 {
  max-width: 900px;
  font-size: clamp(2.8rem, 6vw, 4.8rem);
}

.breadcrumb {
  margin-bottom: 18px;
}

.breadcrumb a {
  color: var(--accent-dark);
  text-decoration: none;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.check-list {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 28px;
}

.check-list li::before {
  position: absolute;
  left: 0;
  color: var(--accent);
  content: "✓";
  font-weight: 900;
}

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

.faq details {
  padding: 19px 20px;
}

.faq summary {
  cursor: pointer;
  font-weight: 800;
}

.faq details p {
  margin: 12px 0 0;
  color: var(--muted);
}

.cta-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 28px;
  padding: 38px;
  background: var(--soft-blue);
  border-radius: 24px;
}

.cta-panel p {
  margin-bottom: 0;
  color: var(--muted);
}

.legal-page {
  max-width: 820px;
}

.legal-page h2 {
  margin-top: 38px;
  font-size: 1.8rem;
}

.legal-page h3 {
  margin-top: 24px;
  font-size: 1.2rem;
}

.legal-page p,
.legal-page li {
  color: #45515e;
}

.site-footer {
  padding: 34px 0 44px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 0.88rem;
}

.foot-inner {
  display: flex;
  justify-content: space-between;
  gap: 22px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.footer-links a {
  color: var(--accent-dark);
  text-decoration: none;
}

.footer-profile-link {
  gap: 6px;
}

.footer-profile-icon {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
}

/* Language Insights index and article pages. */
.articles-hero .lead {
  max-width: 820px;
}

.articles-list-section {
  background: #f2f6fa;
}

.articles-list-wrap {
  max-width: 1080px;
}

.article-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.article-preview-card {
  padding: clamp(26px, 5vw, 48px);
  background: var(--card);
  border: 1px solid rgba(75, 120, 184, 0.32);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

.article-preview-meta,
.article-byline {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 700;
}

.article-preview-meta span + span::before,
.article-preview-meta time + span::before,
.article-byline > * + *::before {
  margin-right: 18px;
  color: var(--accent);
  content: "·";
}

.article-preview-card h3 {
  max-width: 780px;
  margin: 18px 0 16px;
  font-size: clamp(1.55rem, 3vw, 2.05rem);
  letter-spacing: -0.03em;
}

.article-preview-featured {
  grid-column: 1 / -1;
}

.article-preview-featured h3 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
}

.article-preview-card h3 a {
  text-decoration: none;
}

.article-preview-card h3 a:hover {
  color: var(--accent-dark);
}

.article-preview-card p {
  max-width: 800px;
  color: #45515e;
  font-size: 1.06rem;
}

.article-read-link {
  display: inline-block;
  min-height: 44px;
  padding-top: 8px;
}

.article-heading-wrap {
  max-width: 1020px;
}

.article-header h1 {
  max-width: 980px;
}

.article-header .lead {
  max-width: 880px;
}

.article-byline {
  margin-top: 26px;
}

.article-byline a {
  color: var(--accent-dark);
  text-underline-offset: 3px;
}

.article-body-section {
  padding-top: 64px;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(180px, 230px) minmax(0, 760px);
  justify-content: center;
  align-items: start;
  gap: clamp(38px, 6vw, 76px);
}

.article-layout-single {
  grid-template-columns: minmax(0, 760px);
}

.article-aside {
  position: sticky;
  top: 104px;
}

.article-aside-card {
  padding: 22px;
  background: var(--soft-blue);
  border: 1px solid rgba(75, 120, 184, 0.3);
  border-radius: 16px;
}

.article-aside-card strong {
  display: block;
  margin-bottom: 12px;
  font-size: 1rem;
}

.article-aside-card nav {
  display: grid;
  gap: 10px;
}

.article-aside-card a {
  color: var(--accent-dark);
  font-size: 0.9rem;
  line-height: 1.45;
  text-decoration: none;
}

.article-aside-card a:hover {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.article-prose {
  min-width: 0;
}

.article-prose p,
.article-prose li {
  color: #394653;
}

.article-prose p {
  margin-bottom: 1.35em;
}

.article-prose .article-opening {
  color: var(--ink);
  font-size: 1.25rem;
  line-height: 1.72;
}

.article-prose h2 {
  margin: 2.1em 0 0.65em;
  font-size: clamp(1.9rem, 4vw, 2.55rem);
  scroll-margin-top: 112px;
}

.article-prose h3 {
  margin: 1.8em 0 0.65em;
  font-size: 1.45rem;
}

.article-prose ul {
  margin: 0 0 1.7em;
  padding-left: 1.35em;
}

.article-prose li {
  margin: 0.65em 0;
}

.article-note {
  margin: 34px 0;
  padding: 24px 26px;
  background: var(--soft-blue);
  border-left: 4px solid var(--accent);
  border-radius: 0 14px 14px 0;
}

.article-note strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.06rem;
}

.article-note p {
  margin-bottom: 0;
}

.article-sources {
  margin-top: 54px;
  padding-top: 34px;
  border-top: 1px solid var(--line);
}

.article-sources h2 {
  margin-top: 0;
  font-size: 1.65rem;
}

.article-sources a {
  color: var(--accent-dark);
  overflow-wrap: anywhere;
  text-underline-offset: 3px;
}

.article-author-card {
  margin-top: 52px;
  padding: 30px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  box-shadow: 0 12px 32px rgba(24, 32, 42, 0.06);
}

.article-author-card h2 {
  margin: 0 0 12px;
  font-size: 1.9rem;
}

.article-author-card p {
  margin-bottom: 0;
}

.article-series-nav {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 42px;
}

.article-series-nav a {
  min-width: 0;
  padding: 18px 20px;
  color: var(--ink);
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: 14px;
  font-weight: 700;
  line-height: 1.45;
  text-decoration: none;
}

.article-series-nav a:hover {
  border-color: rgba(75, 120, 184, 0.55);
}

.article-series-nav span {
  display: block;
  margin-bottom: 5px;
  color: var(--accent-dark);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.back-to-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 19;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 9px 13px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: 0 8px 24px rgba(24, 32, 42, 0.1);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  opacity: 0;
  pointer-events: none;
  text-decoration: none;
  transform: translateY(8px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}

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

@media (max-width: 960px) {
  .hero-grid,
  .about-grid,
  .content-split,
  .review-summary,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .about-photo {
    order: -1;
  }

  .contact-copy {
    position: static;
  }

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

  .rate-grid,
  .related-grid {
    grid-template-columns: 1fr;
  }

  .article-layout {
    grid-template-columns: minmax(0, 760px);
  }

  .article-aside {
    position: static;
  }

  .article-aside-card nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  body {
    font-size: 16px;
  }

  .wrap {
    width: min(100% - 36px, var(--max));
  }

  .nav-inner,
  .nav.is-scrolled .nav-inner {
    min-height: 68px;
    padding-block: 7px;
  }

  .brand-logo img,
  .nav.is-scrolled .brand-logo img {
    width: 52px;
    height: 52px;
  }

  .brand-logo span {
    display: none;
  }

  .menu-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    display: none;
    padding: 14px 18px 20px;
    background: rgba(251, 250, 247, 0.98);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 12px 24px rgba(24, 32, 42, 0.08);
  }

  .nav-links.is-open {
    display: grid;
    gap: 3px;
  }

  .nav-links a {
    padding: 9px 0;
  }

  .nav-links .nav-cta {
    margin-top: 6px;
    text-align: center;
  }

  section,
  .hero,
  .page-hero {
    padding: 52px 0;
  }

  h1,
  .page-hero h1 {
    font-size: clamp(2.45rem, 12vw, 3.4rem);
    line-height: 1.02;
  }

  h2 {
    font-size: clamp(2rem, 9vw, 2.7rem);
  }

  .hero-actions {
    display: grid;
  }

  .service-grid,
  .additional-grid,
  .review-grid,
  .content-grid,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .method-grid {
    grid-template-columns: 1fr;
  }

  .form-field.full {
    grid-column: auto;
  }

  .price-cta,
  .cta-panel {
    grid-template-columns: 1fr;
  }

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

  .contact-form,
  .additional-tuition,
  .cta-panel {
    padding: 22px;
  }

  .foot-inner {
    display: grid;
  }

  .article-preview-meta,
  .article-byline {
    display: grid;
    gap: 5px;
  }

  .article-preview-meta span + span::before,
  .article-preview-meta time + span::before,
  .article-byline > * + *::before {
    content: none;
  }

  .article-aside-card nav {
    grid-template-columns: 1fr;
  }

  .article-card-grid,
  .article-series-nav {
    grid-template-columns: 1fr;
  }

  .article-preview-featured {
    grid-column: auto;
  }

  .article-prose .article-opening {
    font-size: 1.12rem;
  }

  .article-note,
  .article-author-card {
    padding: 22px;
  }
}

@media (max-width: 430px) {
  .rating-row {
  grid-template-columns: 1fr;
}

  .review-card {
    min-height: 0;
  }

  .back-to-top span:last-child {
    display: none;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto;
    transition-duration: 0.01ms;
  }
}.wechat-id {
  margin-bottom: 12px;
}

.wechat-qr {
  width: 160px;
  height: 160px;
  margin-top: 4px;
  border-radius: 12px;
}
.review-card-long {
  grid-column: 1 / -1;
  min-height: 0;
}

.review-card-long blockquote {
  margin: 0;
  color: var(--ink);
  font-size: 1.06rem;
  line-height: 1.65;
}

.review-card-long details {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.review-card-long summary {
  cursor: pointer;
  color: var(--accent-dark);
  font-weight: 800;
}

.review-card-long details blockquote {
  margin-top: 14px;
  color: #45515e;
}

.review-card-long footer {
  margin-top: 22px;
}
/* Expandable academic background */
.academic-details {
  margin-top: 20px;
}

.academic-details summary {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-dark);
  font-weight: 800;
  cursor: pointer;
  list-style: none;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 4px;
}

.academic-details summary::-webkit-details-marker {
  display: none;
}

.academic-details summary span {
  display: inline-block;
  transition: transform 0.2s ease;
}

.academic-details[open] summary span {
  transform: rotate(90deg);
}

.academic-details-content {
  margin-top: 22px;
  padding: 24px;
  background: var(--soft);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.academic-details-content h3 {
  margin-bottom: 8px;
}

.academic-details-content .academic-intro {
  margin-bottom: 20px;
  color: var(--muted);
}

.academic-details-content p:last-child {
  margin-bottom: 0;
}

@media (max-width: 600px) {
  .academic-details-content {
    padding: 20px;
  }
}