.guide a.active {
  color: #644fff;
  font-weight: 600;
}

.about-main {
  padding-top: 100px;
}

.about-hero {
  padding: 88px 5% 72px;
  background: linear-gradient(to bottom, #fff, #f0f2ff);
}

.about-hero h1 {
  font-size: 64px;
  font-weight: 600;
  color: #1e0e62;
  text-align: center;
  margin-bottom: 24px;
}

.about-hero p {
  max-width: 920px;
  margin: 0 auto;
  text-align: center;
  font-size: 24px;
  font-weight: 500;
  line-height: 1.7;
  color: rgba(21, 20, 57, 0.55);
}

.about-section {
  padding: 92px 5%;
  background: #fff;
}

.about-section-gray {
  background: #f7f8f9;
}

.about-card {
  background: #fff;
  border: 2px solid #ebeaed;
  border-radius: 12px;
  padding: 32px;
  box-shadow: 0 10px 24px rgba(17, 17, 17, 0.05);
}

.about-card h3 {
  font-size: 28px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 14px;
  color: #1e0e62;
}

.about-card p {
  font-size: 22px;
  font-weight: 500;
  line-height: 1.8;
  color: rgba(21, 20, 57, 0.7);
}

.about-card p + p {
  margin-top: 18px;
}

.feature-grid,
.advantage-list-about {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.timeline {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.timeline-item {
  border-left: 4px solid #644fff;
  background: #fff;
  border-radius: 0 10px 10px 0;
  padding: 24px 24px 24px 20px;
  box-shadow: 0 10px 20px rgba(17, 17, 17, 0.04);
}

.timeline-item h3 {
  font-size: 28px;
  font-weight: 600;
  color: #1e0e62;
  margin-bottom: 10px;
}

.timeline-item p {
  font-size: 20px;
  color: rgba(21, 20, 57, 0.7);
  line-height: 1.7;
}

.vision-card {
  border-color: #cfc8ff;
  background: linear-gradient(160deg, #ffffff 0%, #f5f1ff 100%);
}

@media (max-width: 1200px) {
  .about-hero h1 {
    font-size: 52px;
  }

  .about-hero p {
    font-size: 20px;
  }

  .about-card p {
    font-size: 20px;
  }

  .timeline-item p {
    font-size: 18px;
  }
}

@media (max-width: 768px) {
  .about-main {
    padding-top: 80px;
  }

  .about-hero {
    padding: 64px 5% 56px;
  }

  .about-hero h1 {
    font-size: 42px;
  }

  .about-hero p {
    font-size: 18px;
    line-height: 1.6;
  }

  .about-section {
    padding: 64px 5%;
  }

  .about-card {
    padding: 24px 20px;
  }

  .about-card h3 {
    font-size: 24px;
  }

  .about-card p,
  .timeline-item p {
    font-size: 17px;
  }

  .feature-grid,
  .advantage-list-about {
    grid-template-columns: 1fr;
  }

  .timeline-item h3 {
    font-size: 24px;
  }
}