:root {
  --paper: #F3F0E8;
  --paper-deep: #E7E1D6;
  --ink: #20201F;
  --muted: #625F59;
  --line: rgba(32, 32, 31, .18);
  --burgundy: #6B2431;
  --burgundy-soft: #E9DADC;
  --mist-blue: #DCE7F0;
  --navy: #243550;
  --white: #FFFDF8;
  --content: 1280px;
  --font-display-en: "Cormorant Garamond", Georgia, serif;
  --font-display-zh: "Noto Serif SC", "Songti SC", serif;
  --font-body: "Noto Sans SC", Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  --font-mono: Consolas, "SFMono-Regular", monospace;
  --radius-large: 8px;
  --radius-button: 0;
  --title-path: clamp(2.15rem, 3.15vw, 3.55rem);
  --title-method: clamp(2.5rem, 4.2vw, 4.8rem);
  --title-course: clamp(1.85rem, 2.65vw, 3rem);
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-body);
  font-synthesis: none;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; background: var(--paper); color: var(--ink); }
a { color: inherit; }
button, input { font: inherit; }
::selection { background: var(--burgundy); color: var(--white); }

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 10px 14px;
  background: var(--ink);
  color: var(--white);
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }

.shell {
  width: min(calc(100% - 48px), var(--content));
  margin-inline: auto;
}

.site-nav {
  min-height: 74px;
  padding: 0 max(24px, calc((100vw - var(--content)) / 2));
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 20px;
  background: rgba(243, 240, 232, .96);
  position: sticky;
  top: 0;
  z-index: 30;
  backdrop-filter: blur(10px);
}
.brand {
  justify-self: start;
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}
.brand-name {
  color: var(--navy);
  font: 500 1.42rem/1 var(--font-display-en);
  letter-spacing: .005em;
}
.nav-context,
.nav-action,
.eyebrow,
.model-label,
.path-number,
.section-index,
.course-index,
.course-status {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: .1em;
}
.nav-context {
  justify-self: center;
  color: var(--muted);
  font-size: .76rem;
}
.nav-action {
  justify-self: end;
  text-decoration: none;
  border: 1px solid var(--ink);
  border-radius: var(--radius-button);
  padding: 11px 17px;
  font-size: .74rem;
}
.nav-action:hover { background: var(--navy); color: var(--paper); border-color: var(--navy); }

.home-hero {
  min-height: calc(100vh - 74px);
  padding-block: clamp(74px, 8vw, 112px);
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(420px, .92fr);
  gap: clamp(64px, 7vw, 108px);
  align-items: center;
}
.identity { min-width: 0; max-width: 720px; }
.eyebrow {
  margin: 0 0 34px;
  color: var(--burgundy);
  font-size: .78rem;
}
.eyebrow.navy { color: var(--navy); }
.brand-title {
  margin: 0;
  font-family: var(--font-display-en);
  font-weight: 400;
  letter-spacing: -.04em;
  line-height: .9;
}
.brand-title .title-frame {
  display: block;
  color: var(--ink);
  font-size: clamp(2rem, 3.1vw, 3.45rem);
  font-weight: 400;
}
.brand-title .title-the {
  margin-left: .04em;
  color: rgba(32, 32, 31, .82);
}
.brand-title strong {
  display: block;
  margin-block: .08em .04em;
  color: var(--burgundy);
  font-size: clamp(4.45rem, 6.55vw, 7.05rem);
  font-weight: 500;
  white-space: nowrap;
}
.brand-title .title-sentences {
  margin-left: 1.55em;
  color: rgba(32, 32, 31, .88);
  font-size: clamp(2.2rem, 3.7vw, 4rem);
}
.identity-copy {
  max-width: 620px;
  margin-top: clamp(50px, 5vw, 66px);
  padding-top: 25px;
  border-top: 1px solid var(--line);
}
.identity-copy h2 {
  margin: 0 0 12px;
  color: var(--burgundy);
  font: 500 clamp(1.35rem, 1.8vw, 1.95rem)/1.5 var(--font-display-zh);
}
.identity-copy p {
  margin: 0;
  color: var(--muted);
  font-size: clamp(.98rem, 1.12vw, 1.08rem);
  line-height: 1.85;
}
.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}
.button-link {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0 18px;
  border: 1px solid var(--ink);
  border-radius: var(--radius-button);
  text-decoration: none;
  font-weight: 600;
}
.button-link.primary {
  background: transparent;
  color: var(--ink);
  border-color: var(--ink);
  border-left: 4px solid var(--burgundy);
  padding-left: 15px;
}
.button-link:hover { transform: translateY(-1px); }

.path-card {
  align-self: stretch;
  padding: clamp(38px, 4.2vw, 54px);
  border: 1px solid var(--line);
  border-radius: var(--radius-large);
  background: var(--paper-deep);
  position: relative;
  overflow: hidden;
}
/* No circle or arc decoration: the card stays visually quiet. */
.path-card::before,
.path-card::after { content: none !important; display: none !important; }
.path-card-head {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  align-items: baseline;
}
.model-label,
.path-number {
  margin: 0;
  color: var(--navy);
  font-size: .72rem;
}
.path-card h2 {
  margin: clamp(42px, 5vw, 62px) 0 clamp(42px, 5vw, 58px);
  max-width: 12ch;
  font: 400 var(--title-path)/1.25 var(--font-display-zh);
  letter-spacing: -.035em;
}
.path-card h2 em,
.path-card h2 span {
  display: block;
  font-style: normal;
}
.path-card h2 em { color: var(--burgundy); }
.path-card h2 span { margin-top: .28em; color: var(--ink); }
.path-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.path-list li {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 16px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}
.path-list li > span {
  color: var(--burgundy);
  font: 600 .76rem/1.6 var(--font-mono);
}
.path-list h3 {
  margin: 0 0 5px;
  color: var(--navy);
  font: 600 1.42rem/1 var(--font-display-en);
}
.path-list p {
  margin: 0;
  color: var(--muted);
  font-size: .94rem;
  line-height: 1.55;
}

.manifesto {
  padding-block: clamp(64px, 8vw, 104px);
  background: var(--navy);
  color: var(--paper);
}
.manifesto-grid {
  display: grid;
  grid-template-columns: .38fr 1.2fr .8fr;
  gap: clamp(32px, 6vw, 84px);
  align-items: start;
}
.section-index {
  margin: 8px 0 0;
  color: #E0A39A;
  font-size: .72rem;
}
.manifesto h2 {
  margin: 0;
  font: 500 var(--title-method)/1.1 var(--font-display-zh);
  letter-spacing: -.035em;
}
.manifesto h2 em { color: #E0A39A; font-style: normal; }
.manifesto p:last-child {
  margin: 8px 0 0;
  color: rgba(247, 243, 234, .72);
  line-height: 1.85;
}

.learning-section { padding-block: clamp(84px, 10vw, 132px); }
.section-grid {
  display: grid;
  grid-template-columns: .52fr 1.48fr;
  gap: clamp(48px, 8vw, 110px);
}
.section-heading h2 {
  margin: 10px 0 16px;
  font: 500 clamp(2.8rem, 5vw, 5.2rem)/1.05 var(--font-display-zh);
  letter-spacing: -.04em;
}
.section-heading > p:last-child { color: var(--muted); line-height: 1.7; }
.course-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.course-card {
  min-height: 250px;
  padding: 28px;
  border: 1px solid var(--line);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  background: rgba(255, 253, 248, .36);
}
.course-card:hover {
  border-color: var(--burgundy);
  transform: translateY(-2px);
}
.course-card .course-index {
  color: var(--burgundy);
  font-size: .72rem;
}
.course-card h3 {
  margin: 34px 0 12px;
  color: var(--navy);
  font: 600 var(--title-course)/1 var(--font-display-en);
}
.course-card p { margin: 0; color: var(--muted); line-height: 1.7; }
.course-status {
  margin-top: auto;
  padding-top: 26px;
  color: var(--navy);
  font-size: .7rem;
}
.course-card.comparison {
  grid-column: 1 / -1;
  min-height: 210px;
  background: var(--mist-blue);
}
.course-card.comparison h3 {
  font-family: var(--font-display-zh);
  font-size: clamp(2rem, 3.3vw, 3.9rem);
}

.site-footer {
  padding-block: 44px;
  background: var(--ink);
  color: var(--paper);
}
.site-footer .shell {
  display: flex;
  justify-content: space-between;
  gap: 30px;
  align-items: flex-end;
}
.site-footer p { margin: 0; color: rgba(255,255,255,.65); line-height: 1.6; white-space: nowrap; }
.site-footer b { color: var(--paper); font: 600 1.3rem/1 var(--font-display-en); }
.site-footer .footer-brand { font-family: var(--font-display-en); font-weight: 500; }

@media (max-width: 1080px) {
  .home-hero {
    grid-template-columns: 1fr;
    min-height: auto;
    gap: 72px;
  }
  .identity { max-width: 760px; }
  .path-card { min-height: auto; }
  .path-card h2 { max-width: 16ch; }
}

@media (max-width: 980px) {
  .site-nav { grid-template-columns: 1fr auto; }
  .nav-context { display: none; }
  .manifesto-grid, .section-grid { grid-template-columns: 1fr; }
  .manifesto-grid { gap: 28px; }
}

@media (max-width: 660px) {
  :root {
    --title-path: clamp(2rem, 8.8vw, 2.25rem);
    --title-method: clamp(2rem, 8.8vw, 2.25rem);
    --title-course: clamp(1.7rem, 7vw, 1.82rem);
  }
  .shell { width: min(calc(100% - 32px), var(--content)); }
  .site-nav { min-height: 66px; padding-inline: 16px; }
  .brand-name { font-size: 1.16rem; }
  .nav-action { padding: 10px 13px; }
  .home-hero { padding-block: 58px 82px; gap: 46px; }
  .brand-title strong {
    white-space: normal;
    font-size: clamp(4rem, 19vw, 5.4rem);
    line-height: .9;
  }
  .brand-title .title-frame { font-size: clamp(1.9rem, 10vw, 2.8rem); }
  .brand-title .title-sentences { margin-left: .65em; margin-top: .16em; line-height: 1.08; }
  .manifesto h2 { line-height: 1.18; }
  .identity-copy { margin-top: 44px; }
  .path-card { padding: 30px 24px; }
  .path-card h2 {
    margin-block: 34px 38px;
    max-width: none;
    font-family: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", serif;
    line-height: 1.22;
  }
  .course-grid { grid-template-columns: 1fr; }
  .course-card.comparison { grid-column: auto; }
  .site-footer .shell { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}