.about-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-top: 80px;
}

/* ヒーローセクション */
.about-hero {
  position: relative;
  width: 100%;
  overflow: hidden;
}

.about-hero-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.about-hero-title {
  position: absolute;
  top: 50%;
  left: 20%;
  transform: translate(-50%, -50%);
  font-size: 3rem;
  font-weight: 600;
  color: #FFF;
  letter-spacing: 0.1em;
  margin: 0;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.8),
               0 0 40px rgba(0, 0, 0, 1),
               0 0 20px rgba(255, 255, 255, 0.6),
               0 0 30px rgba(255, 255, 255, 0.4);
}

/* hero以下全体のコンテナ */
.about-content-wrapper {
  max-width: var(--container-width-wide);
  margin: 0 auto;
  padding: 0 10rem;
}

/* 2カラムコンテナ（heroの下から開始） */
.about-container-2col {
  display: grid;
  grid-template-columns: 2fr 50px;
  gap: 3rem;
  padding: 4rem 0;
}

/* メインコンテンツエリア */
.about-main-content-wrapper {
  min-width: 0;
}

/* セクション共通スタイル */
.about-section {
  margin-bottom: 6rem;
}

.section-description {
  font-size: 1rem;
  color: #666;
  line-height: 1.8;
}

/* 社長挨拶 */
.ceo-greeting-content {
  background-color: #fff;
}

.greeting-subtitle {
  font-size: 1.5rem;
  font-weight: normal;
  color: #333;
  margin-bottom: 2rem;
}

.greeting-text {
  font-size: 1rem;
  color: #333;
  line-height: 2;
  margin-bottom: 3rem;
}

.greeting-text p {
  margin-bottom: 1rem;
}

.ceo-signature {
  text-align: right;
  margin-top: 3rem;
}

.signature-title {
  font-size: 0.95rem;
  color: #666;
  margin-bottom: 0.5rem;
}

.signature-name {
  font-size: 1.2rem;
  font-weight: bold;
  color: #333;
}

/* 企業情報 */
.company-info-container {
  background-color: #f9f9f9;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  padding: 3rem;
}

.company-info-title {
  font-size: 1.8rem;
  font-weight: bold;
  color: #222;
  text-align: center;
  margin-bottom: 3rem;
}

.info-section {
  display: flex;
  align-items: stretch;
  margin-bottom: 3rem;
}

.info-section:last-child {
  margin-bottom: 0;
}

.info-section-title {
  font-size: 1.2rem;
  font-weight: bold;
  color: #333;
  padding-left: 1rem;
  min-width: 150px;
  flex-shrink: 0;
  display: flex;
  align-items: flex-start;
  padding-top: 0.5rem;
}

.info-section-divider {
  width: 2px;
  background-color: #ccc;
  margin: 0 1.5rem;
  flex-shrink: 0;
  align-self: stretch;
}

.info-section-content {
  flex: 1;
}

.info-item {
  display: flex;
  margin-bottom: 0.5rem;
  line-height: 1.5;
}

.info-item:last-child {
  margin-bottom: 0;
}

.about-intro-text {
  margin-top: 2rem;
  margin-bottom: 2rem;
}

.info-item-label {
  min-width: 150px;
  flex-shrink: 0;
  color: #666;
  font-size: 0.95rem;
}

.info-item-value {
  flex: 1;
  color: #333;
  font-size: 0.95rem;
  line-height: 1.3;
}

/* ネットワーク */
.network-content {
  border: 2px solid #ddd;
  border-radius: 8px;
  padding: 3rem;
  background-color: #f9f9f9;
}

.network-box {
  padding: 2rem 3rem;
  border-radius: 8px;
  margin-bottom: 3rem;
  text-align: center;
}

.network-box-text {
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1.6;
  margin: 0;
}

.network-diagram {
  text-align: center;
}

.network-diagram img {
  width: 90%;
  height: auto;
}

/* 社会貢献・社会的責任 */
.social-content {
  padding: 2rem 0;
}

.social-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin-bottom: 4rem;
  align-items: start;
}

.social-item:last-child {
  margin-bottom: 0;
}

.social-item-reverse {
  grid-template-columns: 1fr 1fr;
}

.social-item-reverse .social-item-image {
  order: 2;
}

.social-item-reverse .social-item-text {
  order: 1;
}

.social-item-image img {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.social-item-title {
  font-size: 1.3rem;
  font-weight: bold;
  color: #333;
  margin-bottom: 1rem;
}

.social-item-description {
  font-size: 1rem;
  color: #666;
  line-height: 1.9;
}

/* スティッキーサイドバー */
.about-sidebar {
  width: 300px;
}

.sidebar-sticky {
  position: sticky;
  top: 100px;
  border-radius: 8px;
  padding: 2rem;
  height: fit-content;
}

.sidebar-title {
  font-size: 1.4rem;
  font-weight: bold;
  color: #333;
  margin-bottom: 0.3rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid #ddd;
}

.sidebar-nav ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sidebar-nav li:last-child {
  margin-bottom: 0;
}

.sidebar-nav a {
  display: block;
  padding: 0.4rem 1rem;
  color: #333;
  text-decoration: none;
  border-radius: 4px;
  transition: all 0.3s;
  font-size: 0.95rem;
}

.sidebar-nav a:hover {
  background-color: #f9f9f9;
  color: #000;
  padding-left: 1.5rem;
}

/* レスポンシブ */
@media (max-width: 768px) {
  .about-page {
    padding-top: 80px;
  }

  .about-hero {
    padding: 2rem 0;
  }

  .about-hero-title {
    font-size: 1.8rem;
  }

  .about-content-wrapper {
    padding: 0 1rem;
  }

  .about-container-2col {
    grid-template-columns: 1fr;
    padding: 2rem 0;
  }

  .about-sidebar {
    display: none;
  }

  .section-main-title {
    font-size: 1.5rem;
  }

  .greeting-subtitle {
    font-size: 1.2rem;
  }

  .greeting-text {
    font-size: 0.95rem;
  }

  .company-info-container {
    padding: 1.5rem;
  }

  .company-info-title {
    font-size: 1.5rem;
    margin-bottom: 2rem;
  }

  .info-section {
    margin-bottom: 2rem;
  }

  .info-section-title {
    display: block;
    margin-bottom: 1rem;
    padding-left: 0;
  }

  .info-section-divider {
    display: none;
  }

  .info-section-content {
    display: block;
    width: 100%;
  }

  .info-item {
    flex-direction: column;
    margin-bottom: 1.5rem;
  }

  .info-item-label {
    min-width: auto;
    margin-bottom: 0.3rem;
    font-weight: bold;
  }

  .info-item-value {
    padding-left: 0;
  }

  .network-content {
    padding: 2rem 1.5rem;
  }

  .network-box {
    padding: 1.5rem;
  }

  .network-box-text {
    font-size: 1rem;
  }

  .social-item,
  .social-item-reverse {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    margin-bottom: 3rem;
  }

  .social-item-reverse .social-item-image {
    order: 1;
  }

  .social-item-reverse .social-item-text {
    order: 2;
  }

  .social-item-title {
    font-size: 1.2rem;
  }

  .social-item-description {
    font-size: 0.95rem;
  }
}