/* ==========================================
     ETERNATUM BRAND STORY STYLES (LARGER 3-ELEMENTS)
     ========================================== */
  .eternatum-story {
    background-color: #0f0f0f;
    color: #e5e5e5;
    font-family: "Zen Mincho", "Hiragino Mincho ProN", "Yu Mincho", serif;
    line-height: 2.25;
    letter-spacing: 0.16em;
    font-size: 26px;
    overflow: hidden;
    margin: 0;
    padding: 0;
  }

  .eternatum-story *,
  .eternatum-story *::before,
  .eternatum-story *::after {
    border-radius: 0 !important;
    box-sizing: border-box;
  }

  .eternatum-story .sec-inner {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 5vw;
  }

  /* Section Header Universal */
  .eternatum-story .sec-header {
    text-align: center;
    margin-bottom: 6rem;
  }
  .eternatum-story .sec-header h2 {
    font-size: clamp(2.2rem, 4.2vw, 3.4rem);
    color: #fff;
    font-weight: 400;
    letter-spacing: 0.22em;
  }

  /* Hero Section */
  .eternatum-story .hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-bottom: 1px solid #333;
  }

  .eternatum-story .hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('/Theme/Common/assets/img/page/developmentstory/evidence01.png') center/cover no-repeat;
    filter: grayscale(100%) contrast(125%) brightness(0.5);
    transform: scale(1.05);
  }

  .eternatum-story .hero-bg2 {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('/Theme/Common/assets/img/page/developmentstory/evidence01.png') center/cover no-repeat;
    filter: grayscale(100%) contrast(125%) brightness(0.5);
    transform: scale(1.05);
  }

  .eternatum-story .hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 6rem 5rem;
    background: rgba(15, 15, 15, 0.88);
    border: 1px solid rgba(192, 192, 192, 0.45);
    backdrop-filter: blur(8px);
    max-width: 1020px;
    width: 92%;
  }

  .eternatum-story .hero-lead {
    font-size: clamp(2.5rem, 5.2vw, 4.2rem);
    font-weight: 400;
    line-height: 1.85;
    color: #fff;
  }

  .eternatum-story .hero-lead span {
    display: block;
    color: #c0c0c0;
    margin-top: 2rem;
    font-size: clamp(1.6rem, 3.2vw, 2.4rem);
    letter-spacing: 0.32em;
  }

  /* Split Visual Block */
  .eternatum-story .split-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 95vh;
    border-bottom: 1px solid #333;
  }

  .eternatum-story .split-section.reverse .split-visual {
    order: 2;
  }
  .eternatum-story .split-section.reverse .split-text {
    order: 1;
  }

  .eternatum-story .split-visual {
    position: relative;
    min-height: 55vh;
    overflow: hidden;
  }

  .eternatum-story .split-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
  }

  .eternatum-story .mono img {
    filter: grayscale(100%) contrast(135%) brightness(0.65);
  }

  .eternatum-story .split-text {
    display: flex;
    align-items: center;
    padding: 9vw 6vw;
    background: #0f0f0f;
  }

  .eternatum-story .text-block p {
    margin: 0 0 3.5rem 0;
    color: #e0e0e0;
    font-size: clamp(1.5rem, 2.5vw, 2.0rem);
    line-height: 2.2;
  }
  .eternatum-story .text-block p:last-child {
    margin-bottom: 0;
  }

  .eternatum-story .sub-caption {
    font-size: 1.15rem;
    color: #a0a0a0;
    letter-spacing: 0.32em;
    margin-bottom: 2.5rem;
    display: block;
    text-transform: uppercase;
  }

  /* Standard Chapter Section (Added for volume narrative) */
  .eternatum-story .chapter-section {
    padding: 12vw 0;
    border-bottom: 1px solid #333;
    background: #0f0f0f;
  }
  .eternatum-story .chapter-section.alt {
    background: #131313;
  }

  .eternatum-story .narrative-block {
    max-width: 900px;
    margin: 0 auto;
  }
  .eternatum-story .narrative-block p {
    margin: 0 0 3.5rem 0;
    color: #dfdfdf;
    font-size: clamp(1.5rem, 2.5vw, 2.0rem);
    line-height: 2.25;
  }

  /* List & Highlight Additions */
  .eternatum-story .feature-list {
    margin: 4rem 0;
    padding: 3.5rem 4.5rem;
    border-left: 3px solid #c0c0c0;
    background: rgba(255, 255, 255, 0.02);
  }
  .eternatum-story .feature-list li {
    list-style: none;
    font-size: clamp(1.45rem, 2.4vw, 1.85rem);
    color: #fff;
    margin-bottom: 2rem;
    letter-spacing: 0.16em;
    position: relative;
    padding-left: 2rem;
  }
  .eternatum-story .feature-list li::before {
    content: "—";
    position: absolute;
    left: 0;
    color: #c0c0c0;
  }
  .eternatum-story .feature-list li:last-child {
    margin-bottom: 0;
  }

  .eternatum-story .inline-strong {
    color: #fff;
    font-weight: 500;
    background: rgba(192, 192, 192, 0.12);
    padding: 0.2em 0.5em;
    border: 1px solid rgba(192, 192, 192, 0.3);
  }

  /* Dual Comparison / Stats Box */
  .eternatum-story .stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3vw;
    margin: 5rem 0;
  }
  .eternatum-story .stats-card {
    border: 1px solid #333;
    padding: 4.5rem 3.5rem;
    text-align: center;
    background: #111;
  }
  .eternatum-story .stats-card.highlight {
    border-color: #c0c0c0;
    background: #181818;
  }
  .stats-card .stats-label {
    font-size: 1.1rem;
    color: #999;
    letter-spacing: 0.28em;
    margin-bottom: 1.5rem;
    display: block;
  }
  .stats-card .stats-value {
    font-size: clamp(3rem, 6.2vw, 4.8rem);
    color: #fff;
    letter-spacing: 0.1em;
  }
  .stats-card .stats-note {
    font-size: 1.2rem;
    color: #bbb;
    margin-top: 1.5rem;
  }

  /* Full Overlay Quote / Focus */
  .eternatum-story .overlap-section {
    position: relative;
    padding: 16vw 0;
    text-align: center;
    overflow: hidden;
    border-bottom: 1px solid #333;
  }

  .eternatum-story .overlap-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('/Theme/Common/assets/img/page/developmentstory/developmentstory02.png') center/cover no-repeat;
    filter: grayscale(80%) brightness(0.22) contrast(140%);
  }

  .eternatum-story .overlap-card {
    position: relative;
    z-index: 2;
    background: rgba(15, 15, 15, 0.92);
    border: 1px solid rgba(192, 192, 192, 0.4);
    max-width: 1060px;
    margin: 0 auto;
    padding: 8vw 6.5vw;
  }

  .eternatum-story .highlight-text {
    font-size: clamp(2rem, 4vw, 3.3rem);
    color: #fff;
    line-height: 2.1;
    letter-spacing: 0.2em;
  }

  /* Climax / Ending (大型カラーミクロビジュアル構成) */
  .eternatum-story .climax-section {
    position: relative;
    padding: 16vw 0 12vw 0;
    text-align: center;
    background: linear-gradient(180deg, #0f0f0f 0%, #1a1a1a 100%);
    border-top: 1px solid #333;
    border-bottom: 1px solid #333;
  }

  .eternatum-story .climax-micro-visual {
    width: 100%;
    max-width: 1020px;
    aspect-ratio: 16 / 10;
    margin: 0 auto 6rem auto;
    position: relative;
    border: 1px solid rgba(192, 192, 192, 0.55);
    padding: 16px;
    background: #0f0f0f;
    box-shadow: 0 0 60px rgba(0, 0, 0, 0.9);
  }

  .eternatum-story .climax-micro-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: saturate(190%) contrast(125%) brightness(0.95);
  }

  .eternatum-story .brand-signature {
    font-size: clamp(2.8rem, 6.5vw, 5.2rem);
    letter-spacing: 0.35em;
    color: #fff;
    margin-bottom: 3.2rem;
  }

  .eternatum-story .final-statement {
    font-size: clamp(2.1rem, 5vw, 3.9rem);
    color: #e5e5e5;
    letter-spacing: 0.25em;
    font-weight: 400;
    line-height: 2.1;
  }

  /* 3-Column Navigation Grid (「開発ストーリー」「研究成果」「グループ会社」特大化エリア) */
  .eternatum-story .archive-section {
    padding: 10vw 0;
    background: #0b0b0b;
    border-bottom: 1px solid #2a2a2a;
  }

  .eternatum-story .archive-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 3vw;
  }

  .eternatum-story .archive-card {
    display: block;
    text-decoration: none;
    background: #141414;
    border: 1px solid #2a2a2a;
    transition: border-color 0.4s, background-color 0.4s;
    overflow: hidden;
  }

  .eternatum-story .archive-card:hover {
    border-color: #c0c0c0;
    background: #191919;
  }

  .eternatum-story .archive-thumb {
    width: 100%;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    border-bottom: 1px solid #2a2a2a;
  }

  .eternatum-story .archive-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(30%) contrast(110%);
    transition: transform 0.6s ease;
  }

  .eternatum-story .archive-card:hover .archive-thumb img {
    transform: scale(1.05);
  }

  .eternatum-story .archive-body {
    padding: 3.6rem 3.2rem; /* 余白も広めに調整 */
  }

  .eternatum-story .archive-category {
    font-size: clamp(1.25rem, 1.8vw, 1.55rem); /* 極大化 */
    color: #aaa;
    letter-spacing: 0.28em;
    margin-bottom: 1.4rem;
    display: block;
  }

  .eternatum-story .archive-title {
    font-size: clamp(1.9rem, 2.8vw, 2.5rem); /* 極大見出し */
    color: #fff;
    letter-spacing: 0.15em;
    margin-bottom: 1.6rem;
    font-weight: 400;
  }

  .eternatum-story .archive-desc {
    font-size: clamp(1.5rem, 2.1vw, 1.8rem); /* 極大本文 */
    color: #ccc;
    line-height: 2.1;
  }

  /* All Products Final Link Area */
  .eternatum-story .all-product-section {
    position: relative;
    padding: 14vw 0;
    text-align: center;
    overflow: hidden;
  }

  .eternatum-story .all-product-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('/Theme/Common/assets/img/page/about/brandstory05.png') center/cover no-repeat;
    filter: grayscale(100%) contrast(140%) brightness(0.22);
    z-index: 1;
  }

  .eternatum-story .all-product-section .sec-inner {
    position: relative;
    z-index: 2;
  }

  .eternatum-story .all-product-box {
    max-width: 900px;
    margin: 0 auto;
    padding: 7vw 5vw;
    border: 1px solid rgba(192, 192, 192, 0.45);
    background: rgba(12, 12, 12, 0.88);
    backdrop-filter: blur(6px);
  }

  .eternatum-story .all-product-title {
    font-size: clamp(2.1rem, 4vw, 3.2rem);
    letter-spacing: 0.25em;
    color: #fff;
    margin-bottom: 2rem;
  }

  .eternatum-story .all-product-desc {
    font-size: 1.35rem;
    color: #bbb;
    line-height: 2.1;
    margin-bottom: 4.2rem;
  }

  .eternatum-story .all-product-btn {
    display: inline-block;
    padding: 1.6rem 5rem;
    border: 1px solid #c0c0c0;
    color: #fff;
    text-decoration: none;
    font-size: 1.3rem;
    letter-spacing: 0.25em;
    background: transparent;
    transition: background 0.4s, color 0.4s;
  }

  .eternatum-story .all-product-btn:hover {
    background: #c0c0c0;
    color: #0f0f0f;
  }

  /* Responsive Adjustments */
  @media (max-width: 900px) {
    .eternatum-story .archive-grid,
    .eternatum-story .stats-grid {
      grid-template-columns: 1fr;
      gap: 3vw;
    }
  }

  @media (max-width: 768px) {
    .eternatum-story {
      font-size: 20px;
      line-height: 2.05;
      letter-spacing: 0.11em;
    }
    .eternatum-story .hero-content {
      padding: 4rem 2.5rem;
    }
    .eternatum-story .hero-lead {
      font-size: 1.9rem;
      line-height: 1.8;
    }
    .eternatum-story .hero-lead span {
      font-size: 1.3rem;
      letter-spacing: 0.2em;
      margin-top: 1.5rem;
    }
    .eternatum-story .split-section {
      grid-template-columns: 1fr;
    }
    .eternatum-story .split-section.reverse .split-visual {
      order: 1;
    }
    .eternatum-story .split-section.reverse .split-text {
      order: 2;
    }
    .eternatum-story .split-visual {
      min-height: 40vh;
    }
    .eternatum-story .split-text {
      padding: 12vw 6vw;
    }
    .eternatum-story .text-block p {
      font-size: 1.45rem;
      margin-bottom: 2.5rem;
      line-height: 2.1;
    }
    .eternatum-story .sub-caption {
      font-size: 1.05rem;
      letter-spacing: 0.2em;
      margin-bottom: 2rem;
    }
    .eternatum-story .feature-list {
      padding: 2.6rem 2.2rem;
      margin: 3rem 0;
    }
    .eternatum-story .feature-list li {
      font-size: 1.4rem;
    }
    .eternatum-story .stats-card {
      padding: 3.5rem 2rem;
    }
    .eternatum-story .overlap-card {
      padding: 9vw 6vw;
    }
    .eternatum-story .highlight-text {
      font-size: 1.75rem;
      line-height: 2.05;
    }
    .eternatum-story .climax-section {
      padding: 18vw 0 14vw 0;
    }
    .eternatum-story .climax-micro-visual {
      aspect-ratio: 4 / 3;
      padding: 12px;
      margin-bottom: 4rem;
    }
    .eternatum-story .brand-signature {
      font-size: 2.3rem;
      letter-spacing: 0.25em;
      margin-bottom: 2.2rem;
    }
    .eternatum-story .final-statement {
      font-size: 1.9rem;
      letter-spacing: 0.18em;
      line-height: 2.05;
    }
    /* スマホ時の3要素エリアも大幅に文字サイズを大きく調整 */
    .eternatum-story .archive-body {
      padding: 2.6rem 2.2rem;
    }
    .eternatum-story .archive-category {
      font-size: 1.25rem;
    }
    .eternatum-story .archive-title {
      font-size: 1.85rem;
    }
    .eternatum-story .archive-desc {
      font-size: 1.5rem;
    }
    .eternatum-story .all-product-box {
      padding: 9vw 5vw;
    }
    .eternatum-story .all-product-title {
      font-size: 2.0rem;
      letter-spacing: 0.18em;
    }
    .eternatum-story .all-product-desc {
      font-size: 1.3rem;
      margin-bottom: 3rem;
      line-height: 2;
    }
    .eternatum-story .all-product-btn {
      padding: 1.4rem 3.8rem;
      font-size: 1.2rem;
      letter-spacing: 0.2em;
    }
  }