/* Homepage responsive reading and section rhythm. */
.quote-card__attribution { display: flex; align-items: center; gap: 14px; }
.quote-card__portrait { width: 64px; height: 64px; flex: 0 0 64px; border-radius: 50%; object-fit: cover; }
.quote-card__attribution > div { min-width: 0; }
:root { --nav-offset: 100px; }
.site-nav { position: sticky; top: 0; z-index: 30; background: rgba(246,244,239,.97); backdrop-filter: blur(12px); }
.page main > section[id], .offer-card[id] { scroll-margin-top: var(--nav-offset); }
.page main > :is(#who,#facing,#difference,#offers,#about,#insights,.testimonials) { padding-block: clamp(36px,5vw,64px); margin-bottom: 0; }
.page main > :is(#facing,#offers,.testimonials) { background: #eaf0ec; box-shadow: 0 0 0 100vmax #eaf0ec; clip-path: inset(0 -100vmax); }
.page main > :is(#difference,#about,#insights) { border-top: 1px solid var(--line); }
.page main > .difference__media { margin-block: 24px; }
.offer-jump { display: flex; flex-wrap: wrap; gap: 10px; margin: 24px 0; }
.offer-jump a { padding: 10px 16px; min-height: 44px; border: 1px solid var(--teal); border-radius: 24px; color: var(--teal); font-size: 14px; }
.offer-details { min-width: 0; }
.offer-details summary { cursor: pointer; padding: 12px 0; font-weight: 600; min-height: 44px; }
.offer-details p + p { margin-top: 16px; }
.offer-card:not(.offer-card--featured) { background: var(--paper); }
@media (min-width: 960px) {
  .offer-details summary { display: none; }
  .site-nav__inner { padding-block: 18px; }
}
@media (max-width: 959px) {
  .page { --mobile-page-gutter: clamp(20px, 4vw, 56px); }
  .site-nav {
    width: calc(100% + 2 * var(--mobile-page-gutter));
    margin-inline: calc(-1 * var(--mobile-page-gutter));
    padding-inline: var(--mobile-page-gutter);
    background: var(--bg);
    backdrop-filter: none;
  }
  .page main > section[id], .offer-card[id], .page main [id] { scroll-margin-top: calc(var(--nav-offset) - 16px); }
  .site-nav__inner { padding-block: 12px; gap: 10px; }
  html[lang] .site-nav__brand { flex-direction: column; align-items: flex-start; gap: 2px; max-width: calc(100% - 60px); }
  .site-nav__menu { position: absolute; top: 100%; left: 0; right: 0; background: var(--bg); padding: 16px 20px 24px; border-bottom: 1px solid var(--line); box-shadow: 0 12px 20px #0001; max-height: calc(100dvh - 85px); overflow-y: auto; }
  .site-nav__list { width: 100%; gap: 2px; }
  .site-nav__list a { display: block; padding: 12px 0; font-size: 16px; }
  .lang-switch__opt { min-height: 44px; }
  .offers__grid { grid-template-columns: 1fr; align-items: start; }
  .offer-card { height: auto; }
  .offer-card__media { aspect-ratio: 2.4 / 1; }
}
@media (max-width: 639px) {
  .page { padding-inline: 20px; }
  .hero { padding-block: 28px 32px; }
  .hero__grid { gap: 24px; }
  html[lang="en"] .hero h1 { font-size: clamp(30px,8.5vw,42px); line-height: 1.14; }
  html[lang="zh-Hans"] .hero h1 { font-size: clamp(28px,7.5vw,36px); line-height: 1.4; }
  html[lang="zh-Hans"] .hero__title-line { white-space: normal; display: inline; }
  .hero .kicker { margin-bottom: 16px; letter-spacing: .06em; }
  .hero__lede { margin-top: 16px; }
  .hero__ctas { margin-top: 20px; gap: 10px; }
  .hero__ctas .btn { width: 100%; min-height: 48px; white-space: normal; }
  .hero__portrait { max-width: 160px; }
  .stats { margin-bottom: 24px; }
  .stats__row { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 0 20px; padding-block: 12px 24px; }
  .stats__cell { border-bottom: 1px solid var(--line); }
  .stats__cell:last-child { grid-column: 1 / -1; }
  html[lang] .stats__label { font-size: 14px; }
  .criteria { grid-template-columns: 1fr; gap: 0; }
  .pressure { gap: 12px; }
  .pressure__num { font-size: 26px; }
  .pressure__body { padding-block: 20px; }
  html[lang] #difference .section-head__lede.difference__slogan { font-size: 23px; padding-left: 14px; }
  .difference__pillars { align-items: stretch; gap: 8px; }
  .difference__pillars span { margin-right: 32px; text-align: center; }
  html[lang] .difference__feature { font-size: 24px; line-height: 1.65; padding: 20px; text-wrap: pretty; }
  html[lang] #difference .promise--integrated { padding: 22px 18px; }
  html[lang] #difference .promise--integrated .promise__line { font-size: 18px; }
  .book { padding: 24px 20px; margin: 24px 0; display: flex; flex-direction: column; gap: 24px; }
  .book__grid { order: -1; gap: 28px; }
  .book__media { margin: 0; aspect-ratio: 16 / 9; }
  .book__details a { overflow-wrap: anywhere; }
  .contact-form input,.contact-form textarea { font-size: 16px; }
  .about__meta { grid-template-columns: 1fr; }
  html[lang] .about__body > .lede { font-size: 20px; line-height: 1.65; }
  .testimonials__grid { gap: 16px; align-items: start; }
  .testimonials__grid .quote-card { flex-basis: 100%; padding: 22px; min-width: 0; }
  html[lang] .testimonials .quote-card blockquote p { font-size: 17px; line-height: 1.65; }
  .testimonials__toolbar { flex-wrap: wrap; gap: 12px; }
  .section-cta { margin-top: 28px; text-align: center; }
  .section-cta .btn { min-height: 48px; }
  .insight-card__hero { aspect-ratio: 2 / 1; }
  .site-footer__inner { align-items: flex-start; gap: 10px; }
}

/* Compact iPhone reading: only phone widths; never constrain content height. */
@media (max-width: 639px) {
  .page { --mobile-page-gutter: 18px; padding-inline: var(--mobile-page-gutter); }
  .site-nav__inner { padding-block: 8px; }
  .page main > :is(#who,#facing,#difference,#offers,#about,#insights,.testimonials) { padding-block: 24px; }
  html[lang] h2 { font-size: 25px; line-height: 1.2; }
  .hero { padding-block: 18px 22px; }
  .hero__grid { gap: 14px; }
  html[lang] .hero h1 { font-size: clamp(26px,7.2vw,30px); line-height: 1.25; }
  .hero .kicker { margin-bottom: 12px; }
  html[lang] .hero__subtagline { font-size: 18px; line-height: 1.4; }
  .hero__lede { margin-top: 12px; font-size: 15px; line-height: 1.55; }
  .hero__ctas { margin-top: 14px; gap: 8px; }
  .hero__ctas .btn { min-height: 44px; padding: 12px; }
  .hero__media { order: -1; justify-content: center; }
  .hero__portrait { width: clamp(180px, 52vw, 220px); max-width: 100%; margin-inline: auto; }
  .stats__row { padding-block: 8px 16px; }
  .stats__cell { padding-block: 12px; }
  .clients__list--logos { grid-template-columns: repeat(3,minmax(0,1fr)); gap: 8px 12px; }
  .clients__list--logos li { height: 42px; }
  .clients__list--logos img, .clients__list--logos img.client-logo--block { max-height: 42px; width: 88px; }
  .audience__grid,.facing__grid,.about__grid { gap: 14px; }
  html[lang] :is(.audience__lede,.facing__lede,.criteria__item,.pressure__body p) { font-size: 15px; line-height: 1.55; }
  .audience__lede,.facing__lede { margin-top: 12px; }
  .criteria__item { padding-block: 10px; }
  .page main > .difference__media { width: calc(100% + 36px); max-height: none; margin: 16px -18px; aspect-ratio: auto; overflow: hidden; }
  .page main > .difference__media img { display: block; width: 100%; height: auto; object-fit: cover; }
  .facing__callout { margin-top: 14px; }
  .phone-details summary { cursor: pointer; min-height: 44px; padding-block: 10px; font-size: 15px; font-weight: 600; }
  .phone-details summary h3 { display: inline; }
  .phone-details[open] > summary { margin-bottom: 8px; }
  .pressure__body { padding-block: 4px; }
  .pressure__num { padding-top: 14px; font-size: 22px; }
  html[lang] .pressure h3, html[lang] .facing__callout h3 { font-size: 18px; line-height: 1.35; }
  html[lang] #difference .section-head { gap: 12px; }
  html[lang] #difference .section-head__lede.difference__slogan { font-size: 20px; }
  .difference__body { margin-top: 14px; gap: 12px; }
  .difference__body > p { font-size: 15px; line-height: 1.55; }
  .difference__pillars { flex-direction: row; flex-wrap: nowrap; gap: 5px; }
  html[lang] .difference__pillars span { flex: 1; margin: 0; padding: 8px 4px; font-size: 12px; letter-spacing: 0; }
  .difference__pillars span::after { position: static; display: block; transform: none; font-size: 20px; margin-top: 4px; }
  html[lang] .difference__feature { font-size: 20px; line-height: 1.5; padding: 14px; }
  html[lang] #difference .promise--integrated { margin-top: 4px; padding: 16px; }
  html[lang] #difference .promise--integrated h3 { font-size: 20px; margin-bottom: 8px; }
  html[lang] #difference .promise--integrated .promise__lede { font-size: 15px; margin-bottom: 10px; }
  html[lang] #difference .promise--integrated .promise__line { font-size: 16px; line-height: 1.45; margin: 6px 0; }
  .offer-jump { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); margin-block: 14px; gap: 6px; }
  .offer-jump a { display: flex; align-items: center; justify-content: center; text-align: center; padding: 8px 5px; font-size: 12px; line-height: 1.35; }
  .offer-card { padding: 14px; gap: 8px; position: relative; }
  .offer-card__media { position: absolute; right: 14px; top: 14px; width: 70px; height: 62px; margin: 0; }
  .offer-card > .offer-card__eyebrow, .offer-card > h3 { padding-right: 82px; }
  html[lang] .offer-card h3 { font-size: 19px; line-height: 1.3; }
  .offer-details summary { padding-block: 8px; }
  .book { padding: 20px 16px; gap: 16px; }
  .book__grid { gap: 16px; }
  .book__copy p { margin-top: 12px; }
  .book__details { gap: 12px; }
  .book__media { max-height: 120px; }
  .book .phone-details summary { border: 1px solid currentColor; padding: 10px 12px; }
  .about__body { gap: 12px; }
  html[lang] .about__body > .lede { font-size: 18px; line-height: 1.55; }
  .about__body > p:not(.lede) { font-size: 15px; line-height: 1.55; }
  .testimonials__toolbar { margin-block: 12px; }
  .testimonials__grid .quote-card { padding: 18px; gap: 16px; }
  html[lang] .testimonials .quote-card blockquote p { font-size: 16px; line-height: 1.55; }
  .insights__header { padding-bottom: 14px; }
  .insights__grid { display: flex; gap: 12px; overflow-x: auto; scroll-snap-type: x mandatory; padding-bottom: 12px; }
  .insight-card { flex: 0 0 90%; min-width: 0; scroll-snap-align: start; }
  .insight-card__hero { aspect-ratio: 2.6 / 1; }
  .insight-card__body { padding: 14px; gap: 8px; }
  .section-cta { margin-top: 18px; }
}