:root {
  --ink: #10231d;
  --forest: #173f35;
  --green: #28705c;
  --paper: #fbfdfc;
  --soft: #edf5f1;
  --white: #ffffff;
  --lime: #dfff76;
  --line: rgba(16, 35, 29, 0.16);
  --muted: rgba(16, 35, 29, 0.7);
  --font: Inter, "Avenir Next", Avenir, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --zh: KaiTi, STKaiti, "Kaiti SC", serif;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--paper); color: var(--ink); font-family: var(--font); line-height: 1.6; }
img { max-width: 100%; }
a { color: inherit; text-decoration: none; }
p, h1, h2, h3, figure, dl, dd { margin-top: 0; }
.section-shell { width: min(1180px, calc(100% - 48px)); margin-inline: auto; }
.site-header { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid var(--line); background: rgba(251, 253, 252, 0.92); backdrop-filter: blur(16px); }
.nav { display: flex; align-items: center; justify-content: space-between; gap: 28px; width: min(1180px, calc(100% - 48px)); min-height: 74px; margin-inline: auto; }
.brand, .footer-brand { display: inline-flex; align-items: center; gap: 11px; font-size: 21px; font-weight: 750; }
.brand img, .footer-brand img { width: 34px; height: 34px; }
.nav-links { display: flex; align-items: center; gap: 28px; color: var(--muted); font-size: 15px; font-weight: 600; }
.nav-links a:hover { color: var(--ink); }
.button { display: inline-flex; align-items: center; justify-content: center; min-height: 48px; border: 1px solid var(--forest); border-radius: 6px; background: var(--forest); color: var(--white); padding: 0 22px; font-weight: 700; transition: transform 160ms ease, background 160ms ease; }
.button:hover { transform: translateY(-2px); background: var(--green); }
.button-small { min-height: 40px; padding-inline: 17px; font-size: 14px; }
.button-light { border-color: var(--white); background: var(--white); color: var(--ink); }
.button-light:hover { background: var(--soft); }
.button-accent { border-color: var(--lime); background: var(--lime); color: var(--ink); }
.button-accent:hover { background: #d3f461; }
.text-link { display: inline-flex; align-items: center; gap: 7px; border-bottom: 1px solid currentColor; padding-bottom: 3px; font-weight: 700; }
.hero { display: grid; grid-template-columns: minmax(0, 1fr) clamp(220px, 22vw, 276px); align-items: start; gap: clamp(22px, 2.6vw, 36px); min-height: calc(88vh - 74px); max-height: 860px; padding-block: 52px; }
.hero-content { min-width: 0; }
.kicker { margin-bottom: 17px; color: var(--green); font-size: 14px; font-weight: 800; text-transform: uppercase; }
.kicker.zh { font-family: var(--zh); font-size: 24px; font-weight: 600; text-transform: none; }
h1, h2, h3 { line-height: 1.08; letter-spacing: 0; }
h1 { max-width: 920px; margin-bottom: 26px; font-size: clamp(64px, 8.6vw, 118px); font-weight: 650; }
h2 { margin-bottom: 24px; font-size: clamp(40px, 5vw, 68px); font-weight: 620; }
h3 { margin-bottom: 12px; font-size: 27px; font-weight: 680; }
.hero-copy { max-width: 860px; margin-bottom: 32px; color: var(--muted); font-size: clamp(19px, 1.75vw, 21px); line-height: 1.55; }
.hero-growth { max-width: 680px; margin: -16px 0 30px; color: var(--green); font-size: 16px; font-weight: 700; }
.actions { display: flex; flex-wrap: wrap; align-items: center; gap: 25px; }
.hero-facts { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 22px; max-width: 760px; margin: 48px 0 0; padding-top: 20px; border-top: 1px solid var(--line); }
.hero-facts div { min-width: 0; }
.hero-facts dt { margin-bottom: 3px; font-size: 17px; font-weight: 750; white-space: nowrap; }
.hero-facts dd { color: var(--muted); font-size: 12px; line-height: 1.35; }
.hero-image { position: relative; align-self: start; justify-self: end; width: 100%; margin: clamp(88px, 10vw, 132px) 0 0; text-align: center; }
.hero-image img { position: relative; z-index: 1; display: block; width: 100%; aspect-ratio: 1; border-radius: 50%; object-fit: cover; object-position: center 30%; box-shadow: 11px 13px 0 var(--lime), 0 22px 44px rgba(16, 35, 29, 0.16); }
.hero-image figcaption { position: relative; z-index: 2; display: grid; gap: 1px; justify-items: center; margin-top: 22px; }
.hero-image figcaption strong { font-size: 18px; }
.hero-image figcaption a { color: var(--muted); font-size: 12px; font-weight: 700; }
.section-band { padding-block: 112px; }
.section-band-soft { border-block: 1px solid var(--line); background: var(--white); }
.method-layout, .about-layout, .contact-layout { display: grid; grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr); gap: clamp(60px, 9vw, 150px); }
.section-heading > p:last-child, .about-copy, .contact-action { color: var(--muted); font-size: 18px; }
.principles { border-top: 1px solid var(--line); }
.principle { padding-block: 0; border-bottom: 1px solid var(--line); }
.principle summary { display: grid; grid-template-columns: 54px 1fr auto; align-items: center; gap: 22px; padding-block: 30px; cursor: pointer; list-style: none; }
.principle summary::-webkit-details-marker { display: none; }
.principle summary::after { color: var(--green); font-size: 27px; font-weight: 400; line-height: 1; content: "+"; }
.principle[open] summary::after { content: "−"; }
.principle summary h3 { margin-bottom: 0; }
.principle-number { color: var(--green); font-size: 13px; font-weight: 800; }
.principle p { margin: -8px 46px 30px 76px; color: var(--muted); }
.offers-band { border-bottom: 1px solid var(--line); background: var(--soft); }
.offers-intro { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, 0.58fr); align-items: end; gap: 60px; margin-bottom: 58px; }
.offers-intro > p { color: var(--muted); font-size: 18px; }
.offer-list { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-block: 1px solid var(--line); }
.offer-item { padding: 34px 32px 38px; }
.offer-item + .offer-item { border-left: 1px solid var(--line); }
.offer-item > span { display: block; margin-bottom: 34px; color: var(--green); font-size: 13px; font-weight: 800; }
.offer-item p { margin-bottom: 0; color: var(--muted); }
.about-copy p { margin-bottom: 24px; }
.about-copy .text-link { margin-top: 12px; color: var(--ink); }
.section-band-dark { background: var(--forest); color: var(--white); }
.section-band-dark .kicker { color: var(--lime); }
.lesson-intro { display: grid; grid-template-columns: 1fr minmax(280px, 0.55fr); align-items: end; gap: 60px; margin-bottom: 58px; }
.lesson-intro > p { color: rgba(255,255,255,0.7); font-size: 18px; }
.lesson-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
.lesson-card { display: flex; min-height: 510px; flex-direction: column; justify-content: space-between; border: 1px solid rgba(255,255,255,0.24); border-radius: 8px; padding: 30px; }
.lesson-card.featured { border-color: var(--lime); }
.lesson-label { color: var(--lime); font-size: 13px; font-weight: 800; text-transform: uppercase; }
.lesson-description { color: rgba(255,255,255,0.72); }
.lesson-points { display: grid; gap: 10px; margin: 24px 0 0; padding: 20px 0 0; border-top: 1px solid rgba(255,255,255,0.18); list-style: none; color: rgba(255,255,255,0.86); font-size: 14px; }
.lesson-points li { position: relative; padding-left: 17px; }
.lesson-points li::before { position: absolute; left: 0; color: var(--lime); content: "•"; }
.lesson-bottom { margin-top: 40px; }
.price { display: flex; align-items: baseline; justify-content: space-between; gap: 15px; margin-bottom: 19px; }
.price strong { font-size: 42px; }
.price span { color: rgba(255,255,255,0.62); font-size: 13px; }
.lesson-card .button { width: 100%; }
.booking-note { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; margin-top: 34px; padding-top: 27px; border-top: 1px solid rgba(255,255,255,0.2); color: rgba(255,255,255,0.68); font-size: 14px; }
.booking-note p { margin-bottom: 0; }
.booking-note strong { color: var(--white); }
.contact-band { background: var(--lime); }
.contact-band .kicker { color: var(--ink); }
.contact-layout { align-items: end; }
.contact-action p { color: rgba(16,35,29,0.76); }
.site-footer { border-top: 1px solid var(--line); padding-block: 30px; }
.footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 25px; }
.footer-inner p { margin: 0; color: var(--muted); font-size: 14px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 20px; color: var(--muted); font-size: 13px; }
@media (max-width: 900px) {
  .nav-links { display: none; }
  .hero { grid-template-columns: 1fr; min-height: auto; max-height: none; }
  .hero-content { padding-top: 24px; }
  .hero-image { justify-self: start; width: 200px; margin-top: 2px; }
  .method-layout, .about-layout, .contact-layout, .lesson-intro, .offers-intro { grid-template-columns: 1fr; gap: 44px; }
  .offer-list { grid-template-columns: 1fr; }
  .offer-item + .offer-item { border-top: 1px solid var(--line); border-left: 0; }
  .lesson-grid { grid-template-columns: 1fr; }
  .lesson-card { min-height: 0; }
  .hero-facts { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 620px) {
  .section-shell, .nav { width: min(100% - 30px, 1180px); }
  .nav { min-height: 66px; }
  .nav .button { display: none; }
  h1 { max-width: 245px; font-size: 58px; }
  h2 { font-size: 39px; }
  .hero { position: relative; display: block; padding-block: 48px; }
  .hero-image { position: absolute; top: 82px; right: 0; width: 104px; margin: 0; }
  .hero-image figcaption { display: none; }
  .principle summary { grid-template-columns: 36px 1fr auto; gap: 12px; }
  .principle p { margin-right: 28px; margin-left: 48px; }
  .section-band { padding-block: 76px; }
  .booking-note { grid-template-columns: 1fr; }
  .footer-inner { align-items: flex-start; flex-direction: column; }
}