/* ベース・共通設定 */
:root  {
  --color-bg-white: #ffffff;
  --color-bg-light: #f8f9fa;
  --color-text-main: #333333;
  --color-text-sub: #666666;
  --color-primary: #005bac;
  --color-primary-light: #eef5fc;
  --color-primary-dark: #003666;
  --color-accent-gold: #c5a059;
  --font-family: 'Noto Sans JP', sans-serif;
}

*  {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body  {
  font-family: var(--font-family);
  color: var(--color-text-main);
  background-color: var(--color-bg-white);
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a  {
  text-decoration: none;
  color: inherit;
  transition: all 0.3s ease;
}

img  {
  max-width: 100%;
  height: auto;
  vertical-align: middle;
}

.container  {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 4% ;
  position: relative;
  z-index: 2;
}

/* セクション共通 */
section  {
  padding: 100px 0;
  position: relative;
}

.section-bg-light  {
  background-color: var(--color-bg-light);
}

/* 見出し共通 */
.section-title-area  {
  text-align: center;
  margin-bottom: 60px;
}

.section-eng-title  {
  font-size: 2.35rem;
  font-weight: bold;
  line-height: 1.4;
  letter-spacing: 0.15em;
  color: var(--color-primary);
  text-transform: uppercase;
  display: block;
}

.section-jp-title  {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-sub);
  letter-spacing: 0.05em;
  position: relative;
  display: block;
  padding-bottom: 15px;
}

.section-jp-title::after  {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 30px;
  height: 2px;
  background-color: var(--color-accent-gold);
}

/* 背景装飾（サークルモチーフ） */
.decoration-circle  {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
}

.circle-1  {
  width: 400px;
  height: 400px;
  border: 1px solid rgba(0, 91, 172, 0.08);
  top: -100px;
  right: -100px;
}

/* ヘッダー（固定・追従型） */
header  {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 48px);
  max-width: 1400px;
  background: linear-gradient( 180deg, rgba(255, 255, 255, 0.45) 0%, rgba(255, 255, 255, 0.18) 100% );
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 9999px;
  box-shadow: 0 12px 32px rgba(31, 38, 60, 0.10), 0 2px 6px rgba(31, 38, 60, 0.05), inset 0 1px 0 rgba(255, 255, 255, 0.80), inset 0 -1px 0 rgba(255, 255, 255, 0.12);
  z-index: 1000;
  transition: all 0.3s ease;
}

.header-container  {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 68px;
  padding: 0 28px 0 32px;
}

.logo  {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  letter-spacing: 0.05em;
  transition: color 0.35s ease, text-shadow 0.35s ease;
}

.logo span  {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-left: 10px;
  letter-spacing: 0.05em;
  transition: color 0.35s ease, text-shadow 0.35s ease;
}

header.on-hero .logo, header.on-hero .logo span  {
  color: #ffffff;
  text-shadow: 0 1px 4px rgba(0,0,0,0.25);
}

.nav-list  {
  display: flex;
  list-style: none;
  align-items: center;
}

.nav-item  {
  margin-left: 35px;
}

.nav-link  {
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--color-primary-dark);
  position: relative;
  padding: 5px 0;
  transition: color 0.35s ease, text-shadow 0.35s ease;
}

header.on-hero .nav-link  {
  color: #ffffff;
  text-shadow: 0 1px 4px rgba(0,0,0,0.25);
}

header.on-hero .nav-link::after  {
  background-color: #ffffff;
}

.nav-link::after  {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width 0.3s ease;
}

.nav-link:hover::after  {
  width: 100%;
}

.btn-header-contact  {
  background-color: var(--color-primary);
  color: #ffffff;
  padding: 12px 26px;
  border-radius: 9999px;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  margin-left: 35px;
  box-shadow: 0 4px 12px rgba(0, 91, 172, 0.3);
}

.btn-header-contact:hover  {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
}

/* ハンバーガーボタン */
.menu-toggle  {
  display: none;
  width: 40px;
  height: 40px;
  background: transparent;
  border: none;
  cursor: pointer;
  position: relative;
  padding: 0;
}

.menu-toggle span  {
  display: block;
  position: absolute;
  left: 9px;
  right: 9px;
  height: 2px;
  background-color: var(--color-primary-dark);
  border-radius: 2px;
  transition: transform 0.35s ease, top 0.35s ease, opacity 0.25s ease, background-color 0.35s ease;
}

.menu-toggle span:nth-child(1)  {
  top: 12px;
}

.menu-toggle span:nth-child(2)  {
  top: 19px;
}

.menu-toggle span:nth-child(3)  {
  top: 26px;
}

header.on-hero .menu-toggle span  {
  background-color: #ffffff;
}

body.nav-open .menu-toggle span:nth-child(1)  {
  top: 19px;
  transform: rotate(45deg);
}

body.nav-open .menu-toggle span:nth-child(2)  {
  opacity: 0;
}

body.nav-open .menu-toggle span:nth-child(3)  {
  top: 19px;
  transform: rotate(-45deg);
}

body.nav-open .menu-toggle span  {
  background-color: var(--color-primary-dark);
}

/* SPメニュー（Figma SP_menu デザイン準拠） */
.sp-menu  {
  display: none;
}

.sp-menu-list  {
  list-style: none;
}

.sp-menu-item  {
  border-bottom: 1px solid #e2e8f0;
}

.sp-menu-link  {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 8px;
}

.sp-menu-eng  {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.13em;
  line-height: 1.2;
  text-transform: uppercase;
}

.sp-menu-jp  {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--color-text-sub);
  letter-spacing: 0.02em;
}

.sp-menu-link:hover .sp-menu-eng  {
  color: var(--color-primary-dark);
}

.sp-menu-contact  {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 60px;
  margin-top: 30px;
  background-color: var(--color-primary);
  color: #ffffff;
  border-radius: 9999px;
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  box-shadow: 0 4px 12px rgba(0,91,172,0.3);
}

.sp-menu-contact:hover  {
  background-color: var(--color-primary-dark);
}

/* ファーストビュー（ヒーローエリア） */
.hero  {
  height: 92vh;
  min-height: 620px;
  display: flex;
  align-items: center;
  position: relative;
  background-color: #003666;
  background-image: url('../img/group_thumb.jpg');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: scroll;
  padding-top: 0;
}

.hero-bg-circles  {
  display: none;
}

.hero-circle  {
  position: absolute;
  border-radius: 50%;
}

.hc-1  {
  width: 500px;
  height: 500px;
  background: linear-gradient(135deg, rgba(0,91,172,0.05) 0%, rgba(0,136,255,0.05) 100%);
  top: 10%;
  right: -100px;
}

.hc-2  {
  width: 350px;
  height: 350px;
  border: 2px solid rgba(0, 91, 172, 0.04);
  bottom: 15%;
  left: 5%;
}

.hc-3  {
  width: 150px;
  height: 150px;
  background-color: rgba(197, 160, 89, 0.04);
  top: 25%;
  left: 45%;
}

.hero-content  {
  width: 100%;
  position: relative;
  z-index: 3;
}

.hero-eng-title  {
  font-size: 5.5rem;
  font-weight: 300;
  color: #ffffff;
  line-height: 1.1;
  letter-spacing: 0.08em;
  margin-bottom: 25px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.35);
}

.hero-eng-title span  {
  font-weight: 700;
  display: block;
  color: #ffffff;
}

.hero-jp-title  {
  font-size: 1.4rem;
  font-weight: 400;
  color: #ffffff;
  letter-spacing: 0.1em;
  margin-bottom: 40px;
  border-left: 4px solid var(--color-accent-gold);
  padding-left: 20px;
  text-shadow: 0 1px 6px rgba(0,0,0,0.35);
}

/* スクロールインジケーター */
.scroll-indicator  {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: #ffffff;
  text-decoration: none;
  z-index: 3;
  opacity: 0.9;
  transition: opacity 0.3s ease, transform 0.3s ease;
}

.scroll-indicator:hover  {
  opacity: 1;
  transform: translateX(-50%) translateY(4px);
}

.scroll-indicator-label  {
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  text-shadow: 0 1px 4px rgba(0,0,0,0.35);
  padding-left: 0.3em;
}

.scroll-indicator-arrow  {
  width: 1px;
  height: 50px;
  background: linear-gradient(to bottom, rgba(255,255,255,0) 0%, rgba(255,255,255,0.6) 100%);
  position: relative;
  overflow: hidden;
}

.scroll-indicator-arrow::after  {
  content: '';
  position: absolute;
  top: -50%;
  left: 0;
  width: 100%;
  height: 50%;
  background-color: #ffffff;
  animation: scrollLineMove 1.8s cubic-bezier(0.65, 0, 0.35, 1) infinite;
}

@keyframes scrollLineMove  {
  0%  {
    top: -50%;
  }

  100%  {
    top: 100%;
  }

}

.scroll-indicator-chevron  {
  width: 10px;
  height: 10px;
  border-right: 2px solid #ffffff;
  border-bottom: 2px solid #ffffff;
  transform: rotate(45deg);
  margin-top: -4px;
  animation: scrollChevronBounce 1.8s ease-in-out infinite;
  filter: drop-shadow(0 1px 3px rgba(0,0,0,0.3));
}

@keyframes scrollChevronBounce  {
  0%, 100%  {
    transform: rotate(45deg) translate(0, 0);
  }

  50%  {
    transform: rotate(45deg) translate(3px, 3px);
  }

}

/* 動画エリア */
.movie-section  {
  padding: 80px 0 20px 0;
  background-color: var(--color-bg-white);
  position: relative;
  z-index: 5;
}

.movie-container  {
  max-width: 1000px;
  margin: 0 auto;
}

.movie-wrapper  {
  position: relative;
  width: 100%;
  padding-top: 56.25%;
  background-color: #000;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 15px 40px rgba(0,0,0,0.08);
}

.movie-placeholder  {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #1a1a1a 0%, #333333 100%);
  color: #ffffff;
  cursor: pointer;
}

.movie-placeholder iframe, .movie-placeholder video, .movie-wrapper > iframe  {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.play-button  {
  width: 80px;
  height: 80px;
  background-color: rgba(255, 255, 255, 0.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  transition: all 0.3s ease;
  backdrop-filter: blur(5px);
  border: 1px solid rgba(255,255,255,0.2);
}

.movie-placeholder:hover .play-button  {
  background-color: var(--color-primary);
  border-color: var(--color-primary);
  transform: scale(1.1);
}

.play-icon  {
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 12px 0 12px 20px;
  border-color: transparent transparent transparent #ffffff;
  margin-left: 5px;
}

.movie-text  {
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.8);
}

/* グループパーパス */
.purpose-bg-text  {
  position: absolute;
  font-size: clamp(4rem, 10vw, 10rem);
  font-weight: 800;
  color: rgba(0, 91, 172, 0.02);
  letter-spacing: 0.1em;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  white-space: nowrap;
  z-index: 1;
  user-select: none;
}

.purpose-card  {
  background-color: #ffffff;
  padding: 50px;
  border-radius: 8px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.03);
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
  border-top: 4px solid var(--color-primary);
}

.purpose-label  {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.2em;
  margin-bottom: 20px;
  text-transform: uppercase;
}

.purpose-lead  {
  font-size: 1.6rem;
  font-weight: 500;
  color: var(--color-text-main);
  margin-bottom: 20px;
  line-height: 1.5;
}

.purpose-text  {
  font-size: 1rem;
  color: var(--color-text-sub);
  text-align: justify;
  max-width: 700px;
  margin: 0 auto;
}

/* トップメッセージ */
.message-title-area  {
  text-align: center;
  margin-bottom: 50px;
}

.message-subtitle  {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-accent-gold);
  margin-bottom: 12px;
  display: block;
}

.message-heading  {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.5;
}

.message-wrapper  {
  display: flex;
  align-items: center;
  gap: 60px;
}

.message-image-area  {
  flex: 1;
  position: relative;
}

.message-image-placeholder  {
  display: block;
  width: 100%;
  border-radius: 8px;
  position: relative;
  overflow: hidden;
  object-fit: contain;
  box-shadow: 0 15px 40px rgba(0,0,0,0.08);
}

.message-image-placeholder::before  {
  display: none;
}

.message-text-area  {
  flex: 1.2;
}

.message-paragraph  {
  font-size: 1rem;
  color: var(--color-text-main);
  margin-bottom: 20px;
  text-align: justify;
}

.message-signature  {
  text-align: right;
  margin-top: 40px;
  font-size: 1.1rem;
  font-weight: 500;
}

.message-signature span  {
  font-size: 0.85rem;
  color: var(--color-text-sub);
  display: block;
}

/* グループ会社一覧 */
.company-grid  {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.company-card  {
  background-color: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  padding: 35px 20px;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 380px;
}

.company-card:hover  {
  border-color: var(--color-primary);
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
  transform: translateY(-3px);
}

.company-logo-space  {
  height: 60px;
  background-color: var(--color-bg-light);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  color: var(--color-primary);
  font-size: 1.1rem;
  margin-bottom: 20px;
  letter-spacing: 0.05em;
}

.company-name-area  {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 10px;
}

.company-name  {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--color-text-main);
  line-height: 1.4;
}

.tag-badge  {
  display: inline-block;
  background-color: var(--color-accent-gold);
  color: #ffffff;
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 3px;
  font-weight: 500;
}

.company-desc  {
  font-size: 0.9rem;
  color: var(--color-text-sub);
  margin-bottom: 15px;
}

.company-business-domains  {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  margin-bottom: 25px;
  list-style: none;
}

.company-business-tag  {
  font-size: 0.75rem;
  background-color: var(--color-primary-light);
  color: var(--color-primary);
  padding: 2px 8px;
  border-radius: 4px;
  border: 1px solid rgba(0, 91, 172, 0.1);
}

.company-link  {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: auto;
}

.company-link::after  {
  content: '→';
  transition: transform 0.3s ease;
}

.company-card:hover .company-link::after  {
  transform: translateX(5px);
}

/* サステナビリティ特設エリア */
.company-sustainability-area  {
  text-align: center;
  width: 100%;
}

.btn-sustainability  {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  max-width: 900px;
  min-height: 180px;
  margin: 0 auto;
  background-image: url('../img/sustainability_thumb.jpg');
  background-size: cover;
  background-position: center;
  color: #ffffff;
  border: none;
  border-radius: 8px;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  transition: all 0.3s ease;
  box-shadow: 0 12px 35px rgba(0, 91, 172, 0.2);
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn-sustainability::before  {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.45);
  z-index: 1;
  transition: background-color 0.3s ease;
}

.btn-sustainability span  {
  position: relative;
  z-index: 2;
  border-bottom: 2px solid transparent;
  padding-bottom: 4px;
  transition: border-color 0.3s ease;
}

.btn-sustainability:hover  {
  transform: translateY(-4px);
  box-shadow: 0 18px 45px rgba(0, 91, 172, 0.3);
}

.btn-sustainability:hover::before  {
  background-color: rgba(0, 0, 0, 0.35);
}

.btn-sustainability:hover span  {
  border-color: #ffffff;
}

/* フッター */
footer  {
  background-color: #111111;
  color: #ffffff;
  padding: 60px 0 30px 0;
}

.footer-content  {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 40px;
}

.footer-info .logo  {
  color: #ffffff;
  margin-bottom: 15px;
  display: inline-block;
}

.footer-info .logo span  {
  color: #ffffff;
}

.footer-info p  {
  font-size: 0.85rem;
  color: #999999;
}

.footer-links  {
  display: flex;
  gap: 50px;
}

.footer-link-group-title  {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 15px;
  color: var(--color-accent-gold);
}

.footer-link-list  {
  list-style: none;
}

.footer-link-list li  {
  margin-bottom: 10px;
}

.footer-link-list a  {
  font-size: 0.85rem;
  color: #cccccc;
}

.footer-link-list a:hover  {
  color: #ffffff;
  padding-left: 5px;
}

.footer-bottom  {
  border-top: 1px solid #222222;
  padding-top: 30px;
  text-align: center;
}

.copyright  {
  font-size: 0.8rem;
  color: #666666;
}

/* レスポンシブ対応 */
@media (max-width: 968px)  {
  .message-wrapper  {
    flex-direction: column;
  }

  .company-grid  {
    grid-template-columns: repeat(2, 1fr);
  }

  .hero-eng-title  {
    font-size: 3.5rem;
  }

  .message-heading  {
    font-size: 1.6rem;
  }

}

/* ヘッダー関連（1100pxで管理） */
@media (max-width: 1100px)  {
  .nav-list  {
    display: none;
  }

  .menu-toggle  {
    display: block;
  }

  body.nav-open  {
    overflow: hidden;
  }

  /* メニュー展開中はヘッダーのピルを消して、白い全画面にＸとロゴのみ残す */
  body.nav-open header  {
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-color: transparent;
    box-shadow: none;
  }

  body.nav-open .logo, body.nav-open .logo span  {
    color: var(--color-primary-dark);
    text-shadow: none;
  }

  .sp-menu  {
    position: fixed;
    inset: 0;
    background: #ffffff;
    z-index: 999;
    flex-direction: column;
    padding: 100px 25px 40px;
    overflow-y: auto;
  }

  body.nav-open .sp-menu  {
    display: flex;
  }

}

@media (max-width: 768px)  {
  .company-grid  {
    grid-template-columns: 1fr;
  }

  section  {
    padding: 70px 0;
  }

  .purpose-card  {
    padding: 30px 20px;
  }

  .footer-content  {
    flex-direction: column;
    gap: 40px;
  }

  .btn-sustainability  {
    min-height: 130px;
    font-size: 1.2rem;
    letter-spacing: 0.05em;
  }

}