.about {
  background: var(--base-white);
  color: #1a1a1a;
  padding: 80px 20px 120px;
}

.about-inner {
  width: clamp(320px, 90vw, 1200px);
  margin: 0 auto;
}

.about-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 40px;
  letter-spacing: 0.05em;
  color: var(--text-main);
}

.about-text {
  font-size: 16px;
  line-height: 2;
  margin-bottom: 28px;
  color: var(--text-sub);
}

/* 主催者プロフィール */
.about-profile {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid rgba(0,0,0,0.08);
  padding-top: 24px;
}

.about-profile .conference {
  font-size: 14px;
  color: #555;
  margin-bottom: 24px;
  line-height: 1.8;
}

.about-profile .chair {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.about-profile .chair .role {
  margin-right: 12px;
　color: var(--accent-olive);
}

.about-profile .chair .name-en {
  font-size: 14px;
  font-weight: 400;
  margin-left: 8px;
 color: var(--text-main);
}

.about-profile .affiliation {
  font-size: 14px;
  color: #444;
  line-height: 1.8;
}


/* スマホ対応 */
@media (max-width: 768px) {
  .about-profile {
    flex-direction: column;
  }

  .profile-image {
    width: 140px;
    margin-bottom: 20px;
  }
}