.yichun-intro-main {
  background: #f6f9fc;
  padding-bottom: 58px;
}

.yichun-intro-main section {
  scroll-margin-top: 20px;
}

.yichun-intro-hero {
  position: relative;
  min-height: 250px;
  color: #fff;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(2, 24, 47, 0.92) 0%, rgba(2, 24, 47, 0.74) 44%, rgba(2, 24, 47, 0.36) 100%),
    url("../images/yichun-classroom.webp") center / cover no-repeat;
}

.yichun-intro-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(0, 95, 168, 0.18);
}

.yichun-intro-hero .wrap {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 250px;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 48px;
  align-items: center;
}

.yichun-intro-eyebrow {
  color: #70c7ff;
  font-family: Arial, sans-serif;
  font-size: 14px;
  font-weight: 800;
}

.yichun-intro-hero h1 {
  margin: 14px 0 0;
  color: #fff;
  font-size: 40px;
  line-height: 1.25;
  font-weight: 800;
}

.yichun-intro-hero h1::after {
  content: "";
  display: block;
  width: 64px;
  height: 4px;
  margin: 18px 0 16px;
  background: var(--blue);
}

.yichun-intro-hero p {
  max-width: 760px;
  margin: 0;
  color: rgba(255, 255, 255, 0.94);
  font-size: 18px;
  line-height: 1.8;
}

.yichun-hero-side {
  padding: 28px 30px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.93);
}

.yichun-hero-side strong {
  display: block;
  color: var(--blue-deep);
  font-size: 26px;
  line-height: 1.35;
}

.yichun-hero-side span {
  display: block;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid #c7d8e8;
  color: #4d535c;
  font-size: 17px;
  font-weight: 700;
}

.yichun-intro-start {
  padding-top: 36px;
}

.yichun-intro-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 46px;
  padding: 42px 48px 46px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: #fff;
  box-shadow: 0 10px 26px rgba(17, 24, 39, 0.05);
}

.yichun-section-heading {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 18px;
}

.yichun-section-heading::before {
  content: "";
  width: 16px;
  height: 16px;
  border-radius: 4px;
  background: var(--blue);
  flex: 0 0 auto;
}

.yichun-section-heading h2 {
  margin: 0;
  color: var(--blue-deep);
  font-size: 24px;
  line-height: 1.2;
  font-weight: 800;
  white-space: nowrap;
}

.yichun-section-heading::after {
  content: "";
  height: 2px;
  flex: 1;
  background: #c7d8e8;
}

.yichun-lead-text {
  margin: 0;
  color: var(--text);
  font-size: 15px;
  line-height: 2;
  text-align: justify;
}

.yichun-side-stack {
  display: grid;
  gap: 22px;
}

.yichun-side-card,
.yichun-promise-card,
.yichun-course-card,
.yichun-campus-card {
  border: 1px solid #cfe3f4;
  border-radius: 6px;
  background: #f8fbfe;
}

.yichun-side-card {
  padding: 24px 24px 26px;
}

.yichun-side-card h3,
.yichun-promise-card h3,
.yichun-course-card h3 {
  margin: 0;
  color: var(--blue-deep);
  font-size: 19px;
  line-height: 1.35;
  font-weight: 800;
}

.yichun-side-card p,
.yichun-promise-card p,
.yichun-course-card p {
  margin: 14px 0 0;
  color: #4b5563;
  font-size: 15px;
  line-height: 1.85;
}

.yichun-content-section {
  padding-top: 42px;
}

.yichun-promise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.yichun-promise-card {
  min-height: 196px;
  padding: 26px 26px 30px;
  background: #fff;
  box-shadow: 0 10px 26px rgba(17, 24, 39, 0.05);
}

.yichun-card-heading {
  display: flex;
  align-items: center;
  gap: 14px;
}

.yichun-card-heading::before {
  content: "";
  width: 18px;
  height: 18px;
  border-radius: 4px;
  background: var(--blue);
  flex: 0 0 auto;
}

.yichun-course-tools {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 22px;
}

.yichun-course-tools span {
  display: inline-flex;
  min-height: 50px;
  align-items: center;
  justify-content: center;
  padding: 0 28px;
  border: 1px solid #c7e2f4;
  border-radius: 4px;
  color: var(--blue-deep);
  font-size: 16px;
  font-weight: 800;
  background: var(--blue-soft);
}

.yichun-course-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.yichun-course-card {
  padding: 24px 26px;
  background: #fff;
  box-shadow: 0 10px 26px rgba(17, 24, 39, 0.05);
}

.yichun-quote-line {
  margin: 28px 0 0;
  color: var(--blue-deep);
  font-size: 20px;
  line-height: 1.5;
  font-weight: 800;
}

.yichun-campus-intro {
  margin: -8px 0 26px;
}

.yichun-campus-intro h3 {
  margin: 0;
  color: var(--ink);
  font-size: 20px;
  line-height: 1.5;
  font-weight: 800;
}

.yichun-campus-intro p {
  margin: 12px 0 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}

.yichun-campus-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.yichun-campus-card {
  display: flex;
  min-height: 128px;
  align-items: center;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 10px 26px rgba(17, 24, 39, 0.05);
}

.yichun-campus-caption {
  display: flex;
  min-height: 78px;
  align-items: center;
  gap: 16px;
  padding: 0 24px;
}

.yichun-campus-caption strong {
  display: inline-grid;
  width: 34px;
  height: 34px;
  place-items: center;
  border-radius: 5px;
  color: #fff;
  font-size: 20px;
  background: var(--blue);
  flex: 0 0 auto;
}

.yichun-campus-caption span {
  color: #4b5563;
  font-size: 15px;
  line-height: 1.5;
}

.yichun-footer-band {
  flex: 0 0 auto;
  padding: 44px 0 46px;
  color: #fff;
  background: linear-gradient(90deg, var(--blue-deep), #0094d8, var(--blue-deep));
}

.yichun-footer-band .wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 520px);
  gap: 56px;
  align-items: start;
}

.yichun-footer-band strong {
  display: block;
  font-size: 20px;
  line-height: 1.4;
}

.yichun-footer-band span {
  display: block;
  margin-top: 10px;
  color: rgba(255, 255, 255, 0.88);
  font-size: 16px;
  line-height: 1.8;
}

.yichun-footer-contact {
  display: grid;
  grid-template-columns: 116px minmax(0, 1fr);
  gap: 22px;
  align-items: start;
  justify-self: end;
  width: min(100%, 520px);
}

.yichun-footer-contact img {
  display: block;
  width: 116px;
  height: 116px;
  padding: 8px;
  border-radius: 4px;
  background: #fff;
}

.yichun-footer-contact p {
  margin: 0;
  color: rgba(255, 255, 255, 0.92);
  font-size: 14px;
  line-height: 1.85;
  font-weight: 700;
}

.yichun-footer-contact a {
  color: inherit;
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

.yichun-footer-contact .address {
  margin-top: 10px;
  font-weight: 700;
}

@media (max-width: 980px) {
  .yichun-intro-hero,
  .yichun-intro-hero .wrap {
    min-height: 360px;
  }

  .yichun-intro-hero .wrap {
    grid-template-columns: 1fr;
    gap: 24px;
    align-content: center;
    padding: 36px 0;
  }

  .yichun-hero-side {
    width: min(100%, 340px);
    padding: 22px 24px;
  }

  .yichun-intro-start {
    padding-top: 32px;
  }

  .yichun-intro-panel,
  .yichun-promise-grid,
  .yichun-course-grid,
  .yichun-campus-grid {
    grid-template-columns: 1fr;
  }

  .yichun-intro-panel {
    padding: 28px 22px 32px;
    gap: 28px;
  }

  .yichun-content-section {
    padding-top: 32px;
  }

  .yichun-lead-text {
    font-size: 15px;
    line-height: 1.9;
  }

  .yichun-campus-caption {
    padding: 0 18px;
  }

  .yichun-footer-band .wrap {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .yichun-footer-contact {
    justify-self: stretch;
    grid-template-columns: 96px minmax(0, 1fr);
  }

  .yichun-footer-contact img {
    width: 96px;
    height: 96px;
  }
}

@media (max-width: 700px) {
  .yichun-intro-main {
    padding-bottom: 42px;
  }

  .yichun-intro-hero,
  .yichun-intro-hero .wrap {
    min-height: 240px;
  }

  .yichun-intro-hero .wrap {
    padding: 30px 0;
  }

  .yichun-hero-side {
    display: none;
  }

  .yichun-intro-hero h1 {
    margin-top: 10px;
    font-size: 32px;
  }

  .yichun-intro-hero h1::after {
    margin: 14px 0 12px;
  }

  .yichun-intro-hero p {
    font-size: 16px;
    line-height: 1.75;
  }

  .yichun-intro-start {
    padding-top: 24px;
  }

  .yichun-intro-panel {
    padding: 24px 18px 26px;
    gap: 22px;
  }

  .yichun-section-heading {
    gap: 10px;
    margin-bottom: 16px;
  }

  .yichun-section-heading::before {
    width: 14px;
    height: 14px;
  }

  .yichun-section-heading h2 {
    font-size: 24px;
    white-space: normal;
  }

  .yichun-content-section {
    padding-top: 28px;
  }

  .yichun-promise-grid,
  .yichun-course-grid,
  .yichun-campus-grid {
    gap: 16px;
  }

  .yichun-promise-card {
    min-height: auto;
    padding: 22px 20px 24px;
  }

  .yichun-course-tools {
    gap: 10px;
    margin-bottom: 16px;
  }

  .yichun-course-tools span {
    min-height: 42px;
    padding: 0 20px;
    font-size: 14px;
  }

  .yichun-course-card {
    padding: 22px 20px;
  }

  .yichun-campus-intro h3 {
    font-size: 18px;
  }

  .yichun-footer-band {
    padding: 32px 0 34px;
  }

  .yichun-footer-band strong {
    font-size: 18px;
  }

  .yichun-footer-band span {
    font-size: 14px;
  }

  .yichun-footer-contact {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 14px;
  }

  .yichun-footer-contact img {
    width: 84px;
    height: 84px;
    padding: 6px;
  }

  .yichun-footer-contact p {
    font-size: 13px;
    line-height: 1.75;
  }
}

@media (max-width: 360px) {
  .yichun-footer-contact {
    grid-template-columns: 1fr;
  }
}