:root {
  --ink: #22313d;
  --muted: #64727d;
  --line: rgba(34, 49, 61, .1);
  --orange: #ff7545;
  --yellow: #ffd65c;
  --green: #36b87c;
  --blue: #4f8ff7;
  --paper: #fff9ec;
  --shadow: 0 18px 48px rgba(54, 45, 29, .12);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background: #fff6e6;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  width: min(100% - 32px, 1180px);
  margin: 16px auto 0;
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, .75);
  border-radius: 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: rgba(255, 255, 255, .84);
  box-shadow: 0 14px 36px rgba(54, 45, 29, .1);
  backdrop-filter: blur(14px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--orange), #ff4f63);
  font-size: 23px;
  font-weight: 900;
}

.brand strong,
.brand em {
  display: block;
}

.brand strong {
  font-size: 20px;
}

.brand em {
  margin-top: 3px;
  color: var(--muted);
  font-size: 12px;
  font-style: normal;
  white-space: nowrap;
}

.nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav a {
  padding: 10px 14px;
  border-radius: 999px;
  color: #344653;
  font-weight: 800;
}

.nav a:hover {
  background: #fff3da;
}

main {
  width: min(100%, 1240px);
  margin: 0 auto;
  padding: 34px 24px 60px;
}

.hero {
  min-height: 560px;
  padding: 58px;
  border-radius: 34px;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr);
  align-items: center;
  gap: 40px;
  background:
    radial-gradient(circle at 84% 14%, rgba(255, 214, 92, .5), transparent 26%),
    linear-gradient(135deg, #fff0be, #fffaf0 58%, #eef7ff);
  box-shadow: var(--shadow);
}

.eyebrow,
.section-title p {
  margin: 0 0 8px;
  color: var(--orange);
  font-size: 14px;
  font-weight: 900;
}

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

h1 {
  margin-bottom: 18px;
  max-width: 680px;
  font-size: clamp(42px, 5.4vw, 76px);
  line-height: 1.03;
  font-weight: 900;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.18;
  font-weight: 900;
}

.lead {
  max-width: 650px;
  margin-bottom: 28px;
  color: #42515d;
  font-size: 20px;
  line-height: 1.8;
}

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

.primary-btn,
.ghost-btn,
.course-card a {
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
}

.primary-btn {
  color: #fff;
  background: linear-gradient(135deg, #ff7a2f, #ff4f65);
  box-shadow: 0 12px 22px rgba(255, 93, 62, .22);
}

.ghost-btn,
.course-card a {
  background: #fff;
  border: 1px solid var(--line);
}

.hero-panel {
  display: grid;
  gap: 16px;
}

.metric {
  padding: 24px;
  border-radius: 24px;
  background: rgba(255, 255, 255, .78);
  box-shadow: 0 10px 28px rgba(54, 45, 29, .08);
}

.metric strong,
.metric span {
  display: block;
}

.metric strong {
  margin-bottom: 6px;
  font-size: 34px;
  font-weight: 900;
}

.metric span,
.intro p,
.course-card p,
.footer {
  color: var(--muted);
  line-height: 1.7;
}

.intro {
  margin: 34px 0;
  padding: 30px;
  border-radius: 28px;
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 28px;
  background: #fff;
  box-shadow: var(--shadow);
}

.intro p {
  margin-bottom: 0;
  font-size: 17px;
}

.courses {
  padding: 18px 0;
}

.section-title {
  margin-bottom: 20px;
}

.course-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.course-card {
  padding: 16px;
  border-radius: 26px;
  display: grid;
  grid-template-columns: 116px 1fr;
  gap: 16px;
  align-items: center;
  background: #fff;
  box-shadow: var(--shadow);
}

.course-card img {
  width: 116px;
  height: 104px;
  object-fit: contain;
  border-radius: 20px;
  background: #fff8e6;
}

.course-card h3 {
  margin-bottom: 8px;
  font-size: 21px;
}

.course-card p {
  margin-bottom: 12px;
  font-size: 15px;
}

.course-card a {
  min-height: 38px;
  padding: 0 16px;
  font-size: 14px;
}

.cta {
  margin-top: 34px;
  padding: 34px;
  border-radius: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  color: #fff;
  background: linear-gradient(135deg, #17364a, #23627b);
  box-shadow: var(--shadow);
}

.cta .eyebrow {
  color: rgba(255, 255, 255, .78);
}

.about-hero {
  min-height: 520px;
  padding: 48px;
  border-radius: 34px;
  display: grid;
  grid-template-columns: minmax(0, .95fr) minmax(360px, 1.05fr);
  align-items: center;
  gap: 38px;
  background:
    radial-gradient(circle at 82% 10%, rgba(79, 143, 247, .22), transparent 27%),
    linear-gradient(135deg, #fff0be, #fffaf0 58%, #eef7ff);
  box-shadow: var(--shadow);
}

.about-hero img {
  width: 100%;
  border-radius: 28px;
  box-shadow: var(--shadow);
  background: #fff;
}

.about-panel {
  margin: 34px 0 18px;
  padding: 30px;
  border-radius: 28px;
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 28px;
  background: #fff;
  box-shadow: var(--shadow);
}

.about-panel p,
.about-grid span {
  color: var(--muted);
  line-height: 1.75;
}

.about-panel > p {
  margin-bottom: 0;
  font-size: 17px;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.about-grid article {
  padding: 24px;
  border-radius: 24px;
  background: #fff;
  box-shadow: var(--shadow);
}

.about-grid strong,
.about-grid span {
  display: block;
}

.about-grid strong {
  margin-bottom: 8px;
  font-size: 21px;
}

.product-show {
  margin-top: 34px;
}

.show-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}

.show-grid img {
  width: 100%;
  border-radius: 24px;
  background: #fff;
  box-shadow: var(--shadow);
}

.footer {
  width: min(100% - 32px, 1180px);
  margin: 0 auto 26px;
  padding: 22px;
  border-radius: 22px;
  text-align: center;
  background: #fff;
}

.footer p {
  margin: 0;
}

.footer p + p {
  margin-top: 10px;
}

.footer strong {
  margin: 0 8px;
  color: #50606c;
}

@media (max-width: 980px) {
  .site-header,
  .intro,
  .cta {
    align-items: stretch;
    flex-direction: column;
  }

  .site-header {
    position: static;
  }

  .nav {
    overflow-x: auto;
    padding-bottom: 2px;
  }

  .hero,
  .intro,
  .about-hero,
  .about-panel {
    grid-template-columns: 1fr;
  }

  .hero,
  .about-hero {
    min-height: 0;
    padding: 34px 24px;
  }

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

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

@media (max-width: 620px) {
  .site-header {
    width: calc(100% - 20px);
    margin-top: 10px;
    border-radius: 18px;
  }

  .brand em {
    white-space: normal;
  }

  main {
    padding: 18px 10px 44px;
  }

  .hero {
    padding: 28px 18px;
    border-radius: 24px;
  }

  .about-hero,
  .about-panel {
    padding: 22px;
    border-radius: 24px;
  }

  h1 {
    font-size: 42px;
  }

  .lead {
    font-size: 17px;
  }

  .intro,
  .cta {
    padding: 22px;
    border-radius: 22px;
  }

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

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

  .course-card {
    grid-template-columns: 96px 1fr;
    gap: 12px;
  }

  .course-card img {
    width: 96px;
    height: 92px;
  }
}