:root {
  --paper: #f3f0e8;
  --paper-soft: #e8e3d8;
  --ink: #18201d;
  --forest: #173e32;
  --forest-deep: #102d25;
  --acid: #d9f36a;
  --orange: #e66a3d;
  --line: rgba(24, 32, 29, 0.18);
  --serif: "Songti SC", "STSong", "Noto Serif SC", Georgia, serif;
  --sans: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: clip; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  -webkit-font-smoothing: antialiased;
  overflow-x: clip;
}

a { color: inherit; text-decoration: none; }
button { font: inherit; }
.page-noise {
  position: fixed;
  inset: 0;
  pointer-events: none;
  opacity: 0.035;
  z-index: 20;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.6'/%3E%3C/svg%3E");
}

.section-shell,
.site-header,
.site-footer {
  width: min(1320px, calc(100% - 80px));
  margin-inline: auto;
}

.site-header {
  height: 92px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
  position: relative;
  z-index: 10;
}
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--paper);
  background: var(--ink);
  font: 600 22px/1 Georgia, serif;
}
.brand-copy { font-size: 10px; line-height: 1.2; letter-spacing: 0.15em; }
.desktop-nav { display: flex; gap: 34px; font-size: 13px; }
.desktop-nav a { position: relative; padding-block: 10px; }
.desktop-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 4px;
  height: 1px;
  background: currentColor;
  transition: right 300ms ease;
}
.desktop-nav a:hover::after { right: 0; }
.header-cta {
  padding: 11px 18px;
  border: 1px solid var(--ink);
  border-radius: 100px;
  font-size: 12px;
  transition: 250ms ease;
}
.header-cta:hover { color: var(--paper); background: var(--ink); }

.hero {
  min-height: calc(100svh - 92px);
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  align-items: center;
  gap: 5vw;
  padding-block: 80px;
}
.eyebrow { margin: 0 0 26px; font-size: 11px; font-weight: 600; letter-spacing: 0.24em; }
.hero-title,
.section-title {
  margin: 0;
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -0.055em;
}
.hero-title { font-size: clamp(58px, 7.2vw, 116px); line-height: 0.98; }
.hero-title > span { display: block; white-space: nowrap; }
.ink-circle { position: relative; z-index: 0; }
.ink-circle::after {
  content: "";
  position: absolute;
  inset: -3% -10% -4% -8%;
  border: 2px solid var(--orange);
  border-radius: 51% 49% 46% 54% / 56% 42% 58% 44%;
  transform: rotate(-5deg);
  z-index: -1;
}
.hero-lead {
  max-width: 620px;
  margin: 38px 0 0;
  color: rgba(24, 32, 29, 0.72);
  font-size: 17px;
  line-height: 1.9;
}
.hero-actions { margin-top: 38px; display: flex; align-items: center; gap: 30px; }
.button {
  min-height: 52px;
  padding: 0 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 100px;
  cursor: pointer;
  transition: transform 220ms ease, box-shadow 220ms ease, background 220ms ease;
}
.button:hover { transform: translateY(-2px); }
.button-dark { color: var(--paper); background: var(--ink); box-shadow: 0 12px 28px rgba(24, 32, 29, 0.18); }
.button-dark:hover { background: var(--forest); box-shadow: 0 16px 34px rgba(24, 32, 29, 0.24); }
.text-link { font-size: 13px; border-bottom: 1px solid var(--ink); padding-bottom: 5px; }
.text-link span { margin-left: 8px; }

.hero-visual { position: relative; min-height: 590px; display: grid; place-items: center; }
.score-card {
  width: min(390px, 80%);
  aspect-ratio: 0.77;
  border-radius: 48% 48% 12px 12px;
  background: var(--forest);
  color: var(--paper);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  box-shadow: 0 30px 70px rgba(20, 43, 36, 0.22);
  transform: rotate(2deg);
  position: relative;
  z-index: 2;
}
.score-label { font-size: 10px; letter-spacing: 0.26em; }
.score-number { font: 500 clamp(110px, 13vw, 190px)/0.94 Georgia, serif; letter-spacing: -0.08em; margin: 20px 0; }
.score-note { text-align: center; font: italic 14px/1.5 Georgia, serif; opacity: 0.68; }
.score-orbit { position: absolute; border: 1px solid rgba(24, 32, 29, 0.25); border-radius: 50%; }
.orbit-one { width: 110%; aspect-ratio: 1; transform: rotate(16deg) scaleY(0.63); }
.orbit-two { width: 90%; aspect-ratio: 1; transform: rotate(-25deg) scaleY(0.74); border-color: var(--orange); opacity: 0.55; }
.visual-note { position: absolute; z-index: 3; font-size: 10px; line-height: 1.6; letter-spacing: 0.13em; }
.note-top { top: 8%; right: 0; }
.note-bottom { bottom: 7%; left: 1%; }

.principle-strip {
  min-height: 86px;
  padding: 20px 4vw;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 28px;
  background: var(--acid);
  overflow: hidden;
}
.principle-strip p { margin: 0; font-size: 14px; white-space: nowrap; }
.principle-strip span { width: 5px; height: 5px; border-radius: 50%; background: var(--ink); opacity: 0.45; }

.section-space { padding-block: clamp(100px, 12vw, 180px); }
.section-index { padding-bottom: 22px; border-bottom: 1px solid var(--line); font-size: 10px; letter-spacing: 0.2em; }
.section-index.light { color: rgba(243, 240, 232, 0.55); border-color: rgba(243, 240, 232, 0.2); }
.section-title { font-size: clamp(46px, 5.8vw, 88px); line-height: 1.08; }
.about-grid { display: grid; grid-template-columns: 1.05fr 0.85fr; gap: 10vw; padding-top: 70px; }
.about-body { max-width: 600px; padding-top: 10px; }
.about-body p { color: rgba(24, 32, 29, 0.69); font-size: 15px; line-height: 2; }
.about-body .body-large { margin-top: 0; color: var(--ink); font-family: var(--serif); font-size: clamp(21px, 2vw, 29px); line-height: 1.72; }
.signature-line { display: flex; align-items: center; gap: 16px; margin-top: 44px; font-size: 11px; letter-spacing: 0.15em; }
.signature-line i { width: 48px; height: 1px; background: var(--line); }

.method { color: var(--paper); background: var(--forest-deep); }
.method-head { display: grid; grid-template-columns: 1.25fr 0.55fr; gap: 8vw; align-items: end; padding: 70px 0 80px; }
.method-intro { color: rgba(243, 240, 232, 0.62); font-size: 15px; line-height: 1.9; }
.method-list { border-top: 1px solid rgba(243, 240, 232, 0.22); }
.method-item {
  display: grid;
  grid-template-columns: 70px 1fr auto;
  gap: 30px;
  align-items: center;
  padding: 34px 0;
  border-bottom: 1px solid rgba(243, 240, 232, 0.22);
  transition: padding 280ms ease, color 280ms ease;
}
.method-item:hover { padding-left: 14px; color: var(--acid); }
.method-number { font: italic 16px Georgia, serif; opacity: 0.55; }
.method-item h3 { margin: 0 0 8px; font: 500 29px/1.2 var(--serif); }
.method-item p { max-width: 650px; margin: 0; color: rgba(243, 240, 232, 0.55); font-size: 13px; line-height: 1.75; }
.method-en { font-size: 9px; letter-spacing: 0.22em; opacity: 0.5; }

.courses-head { padding: 70px 0 70px; display: grid; grid-template-columns: 1.2fr 0.5fr; gap: 8vw; align-items: end; }
.courses-head > p { margin: 0; color: rgba(24, 32, 29, 0.62); line-height: 1.8; }
.course-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
.course-card { min-height: 390px; padding: 28px; display: flex; flex-direction: column; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); transition: background 300ms ease, color 300ms ease, transform 300ms ease; }
.course-card:hover { color: var(--paper); background: var(--forest); transform: translateY(-8px); }
.course-card > span { font-size: 10px; opacity: 0.5; }
.course-card h3 { margin: 64px 0 20px; font: 500 clamp(25px, 2.3vw, 36px)/1 Georgia, serif; }
.course-card p { margin: 0; font-size: 13px; line-height: 1.8; opacity: 0.65; }
.course-card b { margin-top: auto; font: 500 22px var(--serif); }

.fit { padding-top: 0; }
.fit-panel { padding: clamp(45px, 6vw, 82px); display: grid; grid-template-columns: 1fr 1fr; gap: 9vw; color: var(--paper); background: var(--orange); border-radius: 4px; }
.fit-panel h2 { margin: 0; font: 500 clamp(36px, 4vw, 60px)/1.18 var(--serif); letter-spacing: -0.04em; }
.fit-panel ul { list-style: none; margin: 0; padding: 0; border-top: 1px solid rgba(243, 240, 232, 0.35); }
.fit-panel li { padding: 19px 0; display: grid; grid-template-columns: 42px 1fr; border-bottom: 1px solid rgba(243, 240, 232, 0.35); font-size: 13px; line-height: 1.6; }
.fit-panel li span { opacity: 0.6; font-family: Georgia, serif; }

.contact { color: var(--paper); background: var(--ink); text-align: center; }
.contact-inner { display: flex; flex-direction: column; align-items: center; }
.contact h2 { margin: 0; font: 500 clamp(52px, 7vw, 108px)/1.05 var(--serif); letter-spacing: -0.055em; }
.contact-copy { max-width: 560px; margin: 32px auto; color: rgba(243, 240, 232, 0.55); font-size: 14px; line-height: 1.8; }
.button-light { color: var(--ink); background: var(--acid); }
.button-light:disabled { cursor: default; opacity: 0.9; }
.button-light:disabled:hover { transform: none; }

.site-footer { min-height: 120px; display: flex; justify-content: space-between; align-items: center; gap: 30px; font-size: 11px; }
.site-footer > div { display: flex; gap: 22px; align-items: center; }
.footer-brand { font-weight: 700; letter-spacing: 0.12em; }
.footer-legal { color: rgba(24, 32, 29, 0.6); }
.footer-legal a { border-bottom: 1px solid currentColor; }

.reveal { opacity: 0; transform: translateY(24px); transition: opacity 750ms cubic-bezier(.2,.7,.2,1), transform 750ms cubic-bezier(.2,.7,.2,1); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
.method-item.reveal:nth-child(2), .course-card.reveal:nth-child(2) { transition-delay: 70ms; }
.method-item.reveal:nth-child(3), .course-card.reveal:nth-child(3) { transition-delay: 140ms; }
.method-item.reveal:nth-child(4), .course-card.reveal:nth-child(4) { transition-delay: 210ms; }

@media (max-width: 980px) {
  .section-shell, .site-header, .site-footer { width: min(100% - 40px, 760px); }
  .desktop-nav { display: none; }
  .hero { grid-template-columns: 1fr; padding-top: 70px; }
  .hero-visual { min-height: 520px; }
  .about-grid, .method-head, .courses-head, .fit-panel { grid-template-columns: 1fr; gap: 55px; }
  .course-grid { grid-template-columns: repeat(2, 1fr); }
  .course-card { min-height: 330px; }
}

@media (max-width: 620px) {
  .section-shell, .site-header, .site-footer { width: calc(100% - 32px); }
  .site-header { height: 76px; }
  .header-cta { display: none; }
  .hero { min-height: auto; padding-block: 70px 40px; }
  .hero-title { font-size: clamp(49px, 15vw, 72px); }
  .hero-title > span { white-space: normal; }
  .hero-lead { font-size: 15px; }
  .hero-actions { align-items: flex-start; flex-direction: column; gap: 22px; }
  .hero-visual { min-height: 450px; }
  .score-card { width: min(300px, 76vw); }
  .score-number { font-size: 110px; }
  .note-top { right: 2%; }
  .principle-strip { justify-content: flex-start; overflow-x: auto; }
  .section-space { padding-block: 92px; }
  .section-title { font-size: 45px; }
  .method-item { grid-template-columns: 42px 1fr; gap: 14px; }
  .method-en { display: none; }
  .course-grid { grid-template-columns: 1fr; }
  .course-card { min-height: 290px; }
  .fit-panel { padding: 36px 24px; }
  .site-footer { padding: 30px 0; align-items: flex-start; flex-direction: column; }
  .site-footer > div { align-items: flex-start; flex-direction: column; gap: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .reveal { opacity: 1; transform: none; }
}