:root {
  --green: #007a53;
  --green-dark: #073a31;
  --green-soft: #edf7f3;
  --orange: #f36c21;
  --ink: #10201c;
  --muted: #65736f;
  --line: #dfe8e4;
  --paper: #ffffff;
  --wash: #f6f8f6;
  --wide: 1120px;
  --radius: 8px;
  --shadow: 0 18px 42px rgba(10, 45, 38, 0.1);
  --font-body: "Inter", "HarmonyOS Sans SC", "MiSans", "PingFang SC", "Noto Sans SC", "Microsoft YaHei UI", "Microsoft YaHei", Arial, sans-serif;
  --font-number: "DIN Alternate", "DIN Condensed", "Inter", "Segoe UI", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.72;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

main > section {
  scroll-margin-top: 82px;
}

h1,
h2,
h3,
p {
  margin-top: 0;
  overflow-wrap: break-word;
}

h1,
h2,
h3 {
  font-weight: 760;
  letter-spacing: 0;
  overflow-wrap: break-word;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  padding: 0 max(20px, calc((100vw - var(--wide)) / 2));
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
}

.brand {
  display: grid;
  place-items: center;
  width: 168px;
  height: 44px;
  padding: 7px 12px;
  border-radius: 6px;
  background: #fff;
}

.brand img {
  max-height: 32px;
  object-fit: contain;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
  color: var(--green-dark);
  font-size: 14px;
  font-weight: 760;
}

.nav a {
  position: relative;
  padding: 8px 0;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 2px;
  width: 100%;
  height: 2px;
  transform: scaleX(0);
  transform-origin: right;
  background: var(--orange);
  transition: transform 0.2s ease;
}

.nav a:hover::after {
  transform: scaleX(1);
  transform-origin: left;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  color: var(--green-dark);
  padding: 10px;
}

.menu-toggle span {
  display: block;
  height: 2px;
  margin: 7px 0;
  background: currentColor;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(390px, 0.72fr);
  gap: 72px;
  align-items: center;
  width: min(var(--wide), calc(100% - 40px));
  margin: 0 auto;
  padding: 86px 0 74px;
}

.hero-copy,
.hero-card,
.section-title,
.path-copy,
.path-steps,
.method-flow,
.curriculum,
.contact-section > div {
  min-width: 0;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--green);
  font-size: 13px;
  font-weight: 820;
  line-height: 1.5;
}

h1 {
  max-width: 760px;
  margin-bottom: 22px;
  font-size: 54px;
  line-height: 1.12;
}

.hero-lead {
  max-width: 720px;
  margin-bottom: 30px;
  color: #33423e;
  font-size: 20px;
  line-height: 1.72;
  font-weight: 620;
}

.hero-actions,
.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  min-width: 136px;
  border-radius: 6px;
  padding: 12px 20px;
  font-size: 15px;
  font-weight: 780;
  line-height: 1.2;
  transition: transform 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  color: #fff;
  background: var(--green);
}

.button.secondary {
  color: var(--green-dark);
  border: 1px solid var(--line);
  background: #fff;
}

.button.primary.light {
  color: var(--green-dark);
  background: #fff;
}

.button.secondary.light {
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.72);
  background: transparent;
}

.hero-card {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
}

.hero-card img {
  width: 100%;
  aspect-ratio: 1.42;
  object-fit: cover;
}

.hero-card-body {
  padding: 24px;
}

.hero-card-body span,
.curriculum small {
  display: inline-flex;
  margin-bottom: 10px;
  color: var(--green);
  font-size: 13px;
  font-weight: 820;
}

.hero-card h2 {
  margin-bottom: 10px;
  font-size: 24px;
  line-height: 1.34;
}

.hero-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 15px;
}

.proof-bar {
  display: grid;
  grid-template-columns: 1.25fr repeat(4, 1fr);
  max-width: var(--wide);
  margin: 0 auto 4px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.proof-bar > div {
  min-height: 94px;
  display: grid;
  align-content: center;
  gap: 6px;
  padding: 18px 22px;
  border-right: 1px solid var(--line);
}

.proof-bar > div:last-child {
  border-right: 0;
}

.proof-logo {
  place-items: center;
}

.proof-logo img {
  width: min(230px, 88%);
}

.proof-bar strong {
  color: var(--green-dark);
  font-family: var(--font-number);
  font-size: 31px;
  line-height: 1;
  font-weight: 820;
}

.proof-bar span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 720;
}

.section {
  padding: 78px max(20px, calc((100vw - var(--wide)) / 2));
}

.muted {
  background: var(--wash);
}

.section-title {
  max-width: 760px;
  margin-bottom: 38px;
}

.section-title.compact {
  margin-right: auto;
  margin-left: auto;
  text-align: center;
}

.section-title h2,
.path-copy h2,
.method-flow .section-title h2,
.contact-section h2 {
  margin-bottom: 14px;
  font-size: 34px;
  line-height: 1.3;
}

.section-title p,
.path-copy p,
.method-flow .section-title p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.82;
}

.audience-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.audience-list article {
  min-height: 220px;
  padding: 28px 26px 28px 0;
  border-right: 1px solid var(--line);
}

.audience-list article:not(:first-child) {
  padding-left: 26px;
}

.audience-list article:last-child {
  border-right: 0;
  padding-right: 0;
}

.audience-list span {
  display: inline-block;
  margin-bottom: 20px;
  color: var(--orange);
  font-family: var(--font-number);
  font-size: 15px;
  font-weight: 820;
}

.audience-list h3,
.curriculum h3,
.path-steps h3,
.method-steps h3,
.teacher-list h3 {
  margin-bottom: 8px;
  font-size: 21px;
  line-height: 1.35;
}

.audience-list p,
.curriculum p,
.path-steps p,
.method-steps p,
.teacher-list p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.76;
}

.curriculum {
  max-width: var(--wide);
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
}

.curriculum-head,
.curriculum-row {
  display: grid;
  grid-template-columns: 1.05fr 1.28fr 1.68fr 1.28fr;
}

.curriculum-head {
  color: #fff;
  background: var(--green-dark);
  font-size: 13px;
  font-weight: 820;
}

.curriculum-head span,
.curriculum-row > * {
  padding: 22px;
  border-right: 1px solid var(--line);
}

.curriculum-head span {
  border-color: rgba(255, 255, 255, 0.14);
}

.curriculum-head span:last-child,
.curriculum-row > *:last-child {
  border-right: 0;
}

.curriculum-row {
  border-bottom: 1px solid var(--line);
}

.curriculum-row:last-child {
  border-bottom: 0;
}

.curriculum-row.featured {
  background: var(--green-soft);
}

.curriculum small {
  margin-bottom: 8px;
}

.curriculum h3 {
  margin-bottom: 0;
}

.path-section {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(480px, 1fr);
  gap: 72px;
  align-items: start;
}

.path-copy img {
  width: 100%;
  margin-top: 28px;
  aspect-ratio: 1.52;
  border-radius: var(--radius);
  object-fit: cover;
}

.path-steps {
  display: grid;
  border-top: 1px solid var(--line);
}

.path-steps article {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 22px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.path-steps span {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 50%;
  color: #fff;
  background: var(--green);
  font-family: var(--font-number);
  font-size: 18px;
  font-weight: 820;
}

.method-flow {
  max-width: var(--wide);
  margin: 0 auto;
}

.method-panel {
  display: grid;
  grid-template-columns: minmax(380px, 0.9fr) minmax(0, 1fr);
  gap: 56px;
  align-items: center;
}

.method-photo {
  margin: 0;
}

.method-photo img {
  width: 100%;
  aspect-ratio: 1.24;
  border-radius: var(--radius);
  object-fit: cover;
}

.method-steps {
  border-top: 1px solid var(--line);
}

.method-steps article {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.method-steps span {
  flex: 0 0 44px;
  color: var(--orange);
  font-family: var(--font-number);
  font-size: 15px;
  font-weight: 820;
  line-height: 1.35;
}

.method-steps div {
  min-width: 0;
}

.output-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
  max-width: var(--wide);
  margin: 0 auto;
}

.output-list span {
  display: grid;
  min-height: 64px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--green-dark);
  background: #fff;
  font-size: 15px;
  font-weight: 780;
  text-align: center;
}

.teacher-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  max-width: var(--wide);
  margin: 0 auto;
}

.teacher-list article {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.teacher-list img {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  object-fit: cover;
  object-position: center top;
  background: #111;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 28px;
  align-items: center;
  padding: 70px max(20px, calc((100vw - var(--wide)) / 2));
  color: #fff;
  background: var(--green);
}

.contact-section .eyebrow {
  color: #d8f3e9;
}

.contact-section h2 {
  max-width: 760px;
}

.contact-section p {
  max-width: 720px;
  margin-bottom: 0;
  color: #d8f3e9;
  font-size: 16px;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 24px max(20px, calc((100vw - var(--wide)) / 2));
  color: #6b7774;
  background: #fff;
  font-size: 13px;
  line-height: 1.7;
}

@media (max-width: 1040px) {
  .hero,
  .path-section,
  .method-panel {
    grid-template-columns: 1fr;
    gap: 42px;
  }

  .proof-bar,
  .audience-list,
  .output-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .proof-logo {
    grid-column: 1 / -1;
  }

  .proof-bar > div {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .proof-bar > div:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .audience-list article,
  .audience-list article:not(:first-child),
  .audience-list article:last-child {
    min-height: auto;
    padding: 24px;
    border-bottom: 1px solid var(--line);
  }

  .audience-list article:nth-child(2n) {
    border-right: 0;
  }

  .audience-list article:nth-last-child(-n + 2) {
    border-bottom: 0;
  }

  .curriculum-head {
    display: none;
  }

  .curriculum-row {
    grid-template-columns: 1fr;
  }

  .curriculum-row > * {
    border-right: 0;
    border-bottom: 1px solid var(--line);
    padding: 18px 22px;
  }

  .curriculum-row > *:last-child {
    border-bottom: 0;
  }

  .contact-section {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 760px) {
  html,
  body {
    width: 100%;
    max-width: 100%;
  }

  body {
    font-size: 15px;
  }

  .site-header {
    height: 64px;
    padding: 0 16px;
  }

  .brand {
    width: 146px;
    height: 42px;
  }

  .menu-toggle {
    display: block;
  }

  .nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    display: none;
    grid-template-columns: 1fr;
    gap: 0;
    padding: 8px 16px 16px;
    color: var(--ink);
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 18px 32px rgba(12, 34, 29, 0.12);
  }

  .site-header.open .nav {
    display: grid;
  }

  .nav a {
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
    font-size: 15px;
  }

  .hero {
    width: calc(100vw - 40px);
    max-width: calc(100vw - 40px);
    padding: 48px 0 54px;
  }

  h1 {
    max-width: 100%;
    font-size: 31px;
    line-height: 1.22;
    overflow-wrap: anywhere;
    word-break: break-all;
    line-break: anywhere;
  }

  .hero-lead {
    max-width: 100%;
    font-size: 17px;
    line-height: 1.72;
    overflow-wrap: anywhere;
    word-break: break-all;
  }

  .hero-card img {
    aspect-ratio: 1.32;
  }

  .button {
    width: 100%;
  }

  .proof-bar {
    width: calc(100vw - 32px);
    margin-top: 0;
  }

  .section {
    width: 100vw;
    max-width: 100vw;
    padding: 56px 20px;
  }

  .section-title,
  .section-title.compact {
    margin-bottom: 28px;
    text-align: left;
  }

  .section-title h2,
  .path-copy h2,
  .method-flow .section-title h2,
  .contact-section h2 {
    font-size: 26px;
    line-height: 1.34;
  }

  .section-title p,
  .path-copy p,
  .method-flow .section-title p,
  .contact-section p {
    font-size: 15px;
  }

  .proof-bar,
  .audience-list,
  .output-list,
  .teacher-list {
    grid-template-columns: 1fr;
  }

  .proof-bar > div,
  .proof-bar > div:nth-last-child(-n + 2),
  .audience-list article,
  .audience-list article:nth-last-child(-n + 2) {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .proof-bar > div:last-child,
  .audience-list article:last-child {
    border-bottom: 0;
  }

  .audience-list article,
  .audience-list article:not(:first-child),
  .audience-list article:last-child {
    padding: 22px 0;
  }

  .path-steps article,
  .method-steps article {
    gap: 16px;
  }

  .method-photo img {
    aspect-ratio: 1.32;
  }

  .teacher-list article {
    grid-template-columns: 82px minmax(0, 1fr);
    padding: 14px;
  }

  .teacher-list img {
    width: 82px;
    height: 82px;
  }

  .contact-section {
    width: 100vw;
    max-width: 100vw;
    padding: 56px 20px;
  }

  .contact-actions {
    width: 100%;
  }

  .site-footer {
    display: grid;
  }
}