:root {
  color-scheme: light dark;
  --bg: #f4f4f0;
  --surface: #ebebe5;
  --surface-strong: #dfdfd7;
  --text: #202321;
  --muted: #60645f;
  --line: #cacbc3;
  --accent: #9d3f30;
  --accent-strong: #7f3025;
  --accent-soft: #ead8d2;
  --on-accent: #fffaf6;
  --focus: #345d9d;
  --radius: 14px;
  --shadow: 0 24px 70px rgba(72, 58, 49, 0.14);
  --shell: min(1180px, calc(100vw - 48px));
  --header-h: 72px;
  font-family: "Noto Sans SC", "Microsoft YaHei UI", "PingFang SC", "Helvetica Neue", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #151817;
    --surface: #1d211f;
    --surface-strong: #282d2a;
    --text: #f1f1eb;
    --muted: #b1b6b0;
    --line: #3a403c;
    --accent: #c86a58;
    --accent-strong: #df7a66;
    --accent-soft: #3c2824;
    --on-accent: #171615;
    --focus: #8eafe5;
    --shadow: 0 24px 70px rgba(4, 6, 5, 0.32);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: 10;
  pointer-events: none;
  content: "";
  opacity: 0.035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 160 160' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.5'/%3E%3C/svg%3E");
}

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

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
select {
  font: inherit;
}

button,
a,
summary,
input,
select {
  -webkit-tap-highlight-color: transparent;
}

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  transform: translateY(-160%);
  border-radius: var(--radius);
  background: var(--text);
  color: var(--bg);
  padding: 10px 16px;
}

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

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.section-pad {
  padding-block: clamp(88px, 10vw, 144px);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  height: var(--header-h);
  border-bottom: 1px solid color-mix(in srgb, var(--line), transparent 30%);
  background: color-mix(in srgb, var(--bg), transparent 10%);
  backdrop-filter: blur(18px) saturate(130%);
}

.nav-wrap {
  display: flex;
  height: 100%;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: var(--radius);
  background: var(--accent);
  color: var(--on-accent);
  font-size: 20px;
  font-weight: 800;
}

.brand-copy {
  display: grid;
  line-height: 1.15;
}

.brand-copy strong {
  font-size: 17px;
  letter-spacing: 0.04em;
}

.brand-copy small {
  margin-top: 5px;
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.06em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: clamp(18px, 2.4vw, 34px);
  font-size: 14px;
}

.main-nav a {
  transition: color 220ms ease;
}

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

.nav-cta {
  border: 1px solid var(--text);
  border-radius: var(--radius);
  padding: 8px 15px;
  font-weight: 700;
}

.menu-button {
  display: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  padding: 8px 14px;
}

.hero {
  min-height: calc(100dvh - var(--header-h));
  display: grid;
  align-items: center;
  padding-block: clamp(38px, 6vw, 72px);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(380px, 0.82fr);
  align-items: center;
  gap: clamp(48px, 7vw, 108px);
}

.eyebrow {
  margin: 0 0 22px;
  color: var(--accent-strong);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  text-wrap: balance;
}

h1 {
  max-width: 700px;
  margin-bottom: 28px;
  font-size: clamp(46px, 5.2vw, 70px);
  font-weight: 760;
  letter-spacing: -0.055em;
  line-height: 1.04;
}

@media (min-width: 901px) and (max-width: 1120px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(330px, 0.72fr);
    gap: 42px;
  }

  h1 {
    font-size: 53px;
  }
}

h2 {
  margin-bottom: 20px;
  font-size: clamp(36px, 4.5vw, 60px);
  letter-spacing: -0.045em;
  line-height: 1.12;
}

h3 {
  margin-bottom: 10px;
  font-size: clamp(20px, 2vw, 27px);
  letter-spacing: -0.025em;
  line-height: 1.3;
}

.hero-lead {
  max-width: 21em;
  margin-bottom: 34px;
  color: var(--muted);
  font-size: clamp(17px, 1.5vw, 20px);
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 24px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: var(--radius);
  padding: 12px 22px;
  font-weight: 750;
  white-space: nowrap;
  cursor: pointer;
  transition: transform 180ms ease, background 180ms ease;
}

.button:active {
  transform: translateY(1px) scale(0.985);
}

.button-primary {
  background: var(--accent);
  color: var(--on-accent);
}

.button-primary:hover {
  background: var(--accent-strong);
}

.text-link {
  display: inline-block;
  border-bottom: 1px solid currentColor;
  padding-block: 5px;
  font-weight: 700;
}

.hero-media {
  position: relative;
  width: min(100%, 490px);
  height: min(68vh, 680px);
  justify-self: end;
  margin: 0;
}

.hero-media::before {
  position: absolute;
  top: -22px;
  right: -24px;
  width: 42%;
  height: 22%;
  border-radius: var(--radius);
  background: var(--accent-soft);
  content: "";
}

.hero-media img {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: var(--radius);
  object-fit: cover;
  box-shadow: var(--shadow);
}

.proof {
  border-block: 1px solid var(--line);
  background: var(--surface);
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.proof-grid > div {
  min-height: 144px;
  display: grid;
  align-content: center;
  gap: 3px;
  padding: 28px clamp(22px, 3vw, 42px);
}

.proof-grid > div + div {
  border-left: 1px solid var(--line);
}

.proof-grid strong {
  font-size: clamp(25px, 2.7vw, 38px);
  letter-spacing: -0.04em;
}

.proof-grid span {
  color: var(--muted);
  font-size: 14px;
}

.diagnosis-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(50px, 9vw, 150px);
}

.diagnosis-heading {
  position: sticky;
  top: 130px;
  align-self: start;
}

.diagnosis-list {
  display: grid;
}

.diagnosis-list article {
  border-bottom: 1px solid var(--line);
  padding: 28px 0 34px;
}

.diagnosis-list article:first-child {
  padding-top: 8px;
}

.diagnosis-list span {
  display: block;
  margin-bottom: 9px;
  font-size: 21px;
  font-weight: 750;
}

.diagnosis-list p {
  max-width: 34em;
  margin-bottom: 0;
  color: var(--muted);
}

.approach {
  background: var(--surface);
}

.section-heading {
  max-width: 720px;
  margin-bottom: 55px;
}

.section-heading p,
.faq-heading p,
.process-copy > p,
.teacher-copy > p,
.consult-copy > p {
  max-width: 42em;
  color: var(--muted);
  font-size: 17px;
}

.approach-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  grid-template-rows: auto auto auto;
  gap: 18px;
}

.approach-item {
  border-radius: var(--radius);
  background: var(--bg);
  padding: clamp(24px, 3vw, 38px);
  overflow: hidden;
}

.approach-item p {
  margin-bottom: 0;
  color: var(--muted);
}

.approach-feature {
  grid-row: span 2;
  padding: 0;
}

.approach-feature img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.approach-feature div {
  padding: clamp(24px, 3vw, 38px);
}

.tinted {
  background: var(--accent-soft);
}

.large-word {
  display: block;
  margin-bottom: 32px;
  color: var(--accent-strong);
  font-size: clamp(56px, 7vw, 92px);
  font-weight: 850;
  letter-spacing: -0.08em;
  line-height: 0.95;
}

.photo-cell {
  padding: 0;
}

.photo-cell img {
  width: 100%;
  height: 100%;
  min-height: 280px;
  object-fit: cover;
}

.approach-wide {
  grid-column: span 2;
  display: grid;
  grid-template-columns: 0.7fr 1fr;
  align-items: end;
  gap: 30px;
  border: 1px solid var(--line);
}

.courses-intro {
  max-width: 750px;
  margin-bottom: 64px;
}

.course-track {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 20px;
}

.course-block {
  grid-column: span 5;
  min-height: 260px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  border-top: 3px solid var(--accent);
  border-radius: 0 0 var(--radius) var(--radius);
  background: var(--surface);
  padding: clamp(24px, 3vw, 40px);
}

.course-block:nth-child(2),
.course-block:nth-child(3) {
  grid-column: span 7;
}

.course-block > span {
  margin-bottom: auto;
  color: var(--accent-strong);
  font-size: 13px;
  font-weight: 750;
}

.course-block p {
  margin-bottom: 0;
  color: var(--muted);
}

.process {
  background: var(--surface);
}

.process-layout {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: clamp(50px, 9vw, 140px);
  align-items: start;
}

.process-copy {
  position: sticky;
  top: 132px;
}

.process-list {
  list-style: none;
  padding: 0;
  margin: 0;
  counter-reset: process;
}

.process-list li {
  position: relative;
  display: grid;
  grid-template-columns: 0.6fr 1fr;
  gap: 30px;
  border-bottom: 1px solid var(--line);
  padding: 34px 0;
  counter-increment: process;
}

.process-list li::before {
  position: absolute;
  top: 37px;
  right: 0;
  color: var(--accent-strong);
  content: counter(process, decimal-leading-zero);
  font-size: 12px;
  font-weight: 800;
}

.process-list strong {
  font-size: 22px;
}

.process-list span {
  padding-right: 40px;
  color: var(--muted);
}

.teachers-grid {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  align-items: center;
  gap: clamp(48px, 9vw, 140px);
}

.teacher-visual {
  height: min(70vh, 680px);
  border-radius: var(--radius);
  overflow: hidden;
}

.teacher-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 73%;
}

.teacher-copy dl {
  display: grid;
  gap: 0;
  margin: 48px 0 0;
}

.teacher-copy dl > div {
  display: grid;
  grid-template-columns: 100px 1fr;
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}

.teacher-copy dt {
  color: var(--accent-strong);
  font-weight: 800;
}

.teacher-copy dd {
  margin: 0;
  color: var(--muted);
}

.faq {
  background: var(--surface);
}

.faq-layout {
  display: grid;
  grid-template-columns: 0.75fr 1.25fr;
  gap: clamp(50px, 9vw, 140px);
}

.faq-list details {
  border-bottom: 1px solid var(--line);
  padding: 23px 0;
}

.faq-list summary {
  position: relative;
  padding-right: 40px;
  font-size: 19px;
  font-weight: 750;
  cursor: pointer;
  list-style: none;
}

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

.faq-list summary::after {
  position: absolute;
  top: 0;
  right: 5px;
  content: "+";
  color: var(--accent-strong);
  font-size: 24px;
  line-height: 1;
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list details p {
  max-width: 44em;
  margin: 16px 40px 0 0;
  color: var(--muted);
}

.consult {
  overflow: hidden;
}

.consult-grid {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: clamp(50px, 8vw, 120px);
  align-items: start;
}

.consult-form {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 22px;
  border-radius: var(--radius);
  background: var(--surface);
  padding: clamp(24px, 4vw, 48px);
}

.field {
  display: grid;
  gap: 8px;
}

.field-wide {
  grid-column: span 2;
}

.field label {
  font-size: 14px;
  font-weight: 750;
}

.field input,
.field select {
  width: 100%;
  min-height: 50px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg);
  color: var(--text);
  padding: 11px 14px;
}

.field input::placeholder {
  color: color-mix(in srgb, var(--muted), transparent 8%);
  opacity: 1;
}

.field input[aria-invalid="true"],
.field select[aria-invalid="true"] {
  border-color: var(--accent-strong);
}

.field-error {
  min-height: 18px;
  color: var(--accent-strong);
  font-size: 12px;
}

.form-status {
  min-height: 24px;
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.form-status.success {
  color: var(--accent-strong);
  font-weight: 700;
}

.site-footer {
  border-top: 1px solid var(--line);
  padding-block: 54px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 30px;
  align-items: start;
}

.footer-brand {
  margin-bottom: 18px;
}

.footer-grid > div > p,
.copyright {
  color: var(--muted);
  font-size: 13px;
}

.footer-links {
  display: flex;
  gap: 24px;
  font-size: 14px;
}

.copyright {
  grid-column: 1 / -1;
  margin: 28px 0 0;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 680ms cubic-bezier(0.16, 1, 0.3, 1), transform 680ms cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 900px) {
  :root {
    --shell: min(100% - 32px, 720px);
  }

  .menu-button {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: calc(100% + 1px);
    left: 0;
    width: 100%;
    display: none;
    align-items: stretch;
    gap: 0;
    border-bottom: 1px solid var(--line);
    background: var(--bg);
    padding: 14px 16px 20px;
  }

  .main-nav.is-open {
    display: grid;
  }

  .main-nav a {
    padding: 12px 8px;
  }

  .nav-cta {
    margin-top: 8px;
    text-align: center;
  }

  .hero {
    min-height: auto;
    padding-block: 42px 64px;
  }

  .hero-grid,
  .diagnosis-grid,
  .process-layout,
  .teachers-grid,
  .faq-layout,
  .consult-grid {
    grid-template-columns: 1fr;
  }

  .hero-grid {
    gap: 42px;
  }

  .hero-media {
    width: 100%;
    height: min(70vh, 620px);
  }

  .diagnosis-heading,
  .process-copy {
    position: static;
  }

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

  .approach-feature,
  .approach-wide {
    grid-column: span 2;
  }

  .course-block,
  .course-block:nth-child(2),
  .course-block:nth-child(3) {
    grid-column: span 6;
  }

  .teachers-grid {
    gap: 48px;
  }

  .teacher-visual {
    height: min(70vh, 620px);
  }
}

@media (max-width: 640px) {
  :root {
    --shell: calc(100% - 32px);
    --header-h: 66px;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
  }

  .brand-copy small {
    display: none;
  }

  .section-pad {
    padding-block: 76px;
  }

  h1 {
    font-size: clamp(40px, 11.2vw, 46px);
  }

  h2 {
    font-size: clamp(34px, 10vw, 46px);
  }

  .hero-actions {
    align-items: flex-start;
    flex-direction: column;
    gap: 14px;
  }

  .hero-media {
    height: 62vh;
  }

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

  .proof-grid > div {
    min-height: 112px;
    padding-inline: 4px;
  }

  .proof-grid > div + div {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

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

  .approach-feature,
  .approach-wide {
    grid-column: auto;
  }

  .approach-feature {
    grid-row: auto;
  }

  .approach-wide {
    grid-template-columns: 1fr;
  }

  .course-track {
    grid-template-columns: 1fr;
  }

  .course-block,
  .course-block:nth-child(2),
  .course-block:nth-child(3) {
    grid-column: auto;
    min-height: 235px;
  }

  .process-list li {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .process-list span {
    padding-right: 32px;
  }

  .teacher-visual {
    height: 560px;
  }

  .consult-form {
    grid-template-columns: 1fr;
  }

  .field-wide {
    grid-column: auto;
  }

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

  .footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .copyright {
    grid-column: auto;
    margin-top: 8px;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .site-header {
    background: var(--bg);
    backdrop-filter: none;
  }
}