body {
        font-family: "Helvetica Neue", sans-serif;
        margin: 0;
        background: #f0f8ff;
        color: #2c3e50;
        font-size: 1.1rem;
      }

      /* 共通：ヘッダー */
header {
  background: #00008b;
  color: white;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: nowrap;
  position: sticky;
  top: 0;
  z-index: 1000;
}

/* ロゴ */
.logo {
  flex-shrink: 0;
}
.logo img {
  height: 40px;
  display: block;
}

/* メニューアイコン（三本線） */
.menu-toggle {
  display: none;
  flex-direction: column;
  cursor: pointer;
  flex-shrink: 0;
}
.menu-toggle .bar {
  height: 3px;
  width: 25px;
  background-color: white;
  margin: 4px 0;
}

/* ナビゲーション（PC） */
nav {
  display: flex;
  flex-wrap: wrap;
}
nav a {
  color: white;
  margin-left: 1.5rem;
  text-decoration: none;
}

/* スマホ時 */
@media (max-width: 768px) {
  header {
    flex-direction: row;             /* ← 横並びのままにする */
    justify-content: space-between;
    align-items: center;
  }

  .logo {
    order: 1;
  }

  .logo img {
    height: 28px;
  }

  .menu-toggle {
    display: flex;
    order: 2;
  }

  nav {
    display: none;
    flex-direction: column;
    align-items: center;
    text-align: center;
    width: 100%;
    background-color: #00008b;
    position: absolute;
    top: 60px; /* ← headerの下に展開されるように */
    left: 0;
    z-index: 999;
    padding: 1rem 0;
  }

  nav.active {
    display: flex;
  }

  nav a {
    margin: 0.5rem 0; /* ← メニュー間隔を詰める */
    font-size: 1rem;
  }
}
      .hero {
        background: url("images/old_mainimg2.jpg") center/cover no-repeat;
        height: 60vh;
        display: flex;
        align-items: center;
        justify-content: flex-start;
        color: white;
        text-align: left;
        padding: 0 5%;
        position: relative;
      }

      .hero-text {
        max-width: 800px;
        padding: 2rem;
        border-radius: 8px;
        /* background: rgba(0, 0, 0, 0.5); ← 削除 or コメントアウト */
      }

      .hero h1 {
        font-size: 2.8rem; /* 元は 2.2rem → 大きく */
        margin-bottom: 1rem;
        text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
      }

      .hero-subtitle {
        font-size: 1.2rem; /* 元は 1.2rem → 一回り大きく */
        text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
      }
      .section {
        padding: 3rem 2rem;
        background: #ffffff;
        margin: 1rem 10px;
      }
      .section h2 {
        text-align: center;
        margin-bottom: 2rem;
        color: #00008b;
        font-size: 2rem;
      }
      .section p {
        max-width: 800px;
        margin: 0 auto 2rem;
        line-height: 1.8;
      }
      .cards {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-around;
        gap: 2rem;
        max-width: 1200px;
        margin: 0 auto;
      }
      .card {
        background: #fffacd;
        padding: 1.5rem;
        border-radius: 8px;
        flex: 1;
        min-width: 250px;
        max-width: 300px;
      }
      .card2 {
        background: #e6e6fa;
        padding: 1.5rem;
        border-radius: 8px;
        flex: 1;
        min-width: 250px;
        max-width: 300px;
      }
      .card3 {
        background: #00008b;
        padding: 1.5rem;
        border-radius: 8px;
        color: white;
        flex: 1;
        min-width: 250px;
        max-width: 300px;
      }
      .card-img {
        width: 100%;
        height: auto;
        border-radius: 6px;
        margin-bottom: 1rem;
      }
      .prefecture-search {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
        gap: 0.5rem;
        max-width: 800px;
        margin: 0 auto;
      }
      .prefecture-search a {
        background: #afdcff;
        padding: 0.5rem;
        text-align: center;
        display: block;
        text-decoration: none;
        color: #4169e1;
        border-radius: 4px;
      }
      .prefecture-search a:hover {
        background: #4169e1;
        color: white;
        transform: scale(1.05);
        transition: all 0.2s ease-in-out;
      }
      .news {
        max-width: 800px;
        margin: 0 auto;
      }
      .news-item {
        border-bottom: 1px solid #ccc;
        padding: 0.8rem 0;
      }
      .news-item time {
        color: #666;
        font-size: 0.9rem;
        display: block;
      }
      .cta {
        background: #00008b;
        color: white;
        padding: 2rem;
        text-align: center;
        margin: 1rem 10px;
      }
      .cta a {
        background: #ff8c00;
        color: #ffffff;
        padding: 1rem 2rem;
        text-decoration: none;
        font-weight: bold;
        border-radius: 5px;
      }
      footer {
        background: #00008b;
        color: white;
        padding: 1rem 2rem;
        text-align: center;
        margin: 0 10px;
      }
      #back-to-top {
        position: fixed;
        bottom: 20px;
        right: 20px;
        background: #4169e1;
        color: white;
        padding: 0.8rem 1rem;
        border-radius: 50%;
        font-size: 1.2rem;
        text-align: center;
        cursor: pointer;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        display: none;
        z-index: 1000;
      }
      .banner-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 1.5rem;
        max-width: 1000px;
        margin: 0 auto;
        padding: 1rem;
      }
      .banner-grid img {
        width: 100%;
        height: auto;
        object-fit: contain;
        border: 1px solid #ccc;
        border-radius: 8px;
        background: white;
        padding: 0.5rem;
      }
      .slider {
        overflow: hidden;
        background: #ffffff;
        padding: 1rem 0;
      }

      .slider-track {
        display: flex;
        animation: scroll 50s linear infinite;
        width: calc(250px * 16); /* 画像8枚×2周分 */
      }

      .slider img {
        width: 250px;
        height: auto;
        margin-right: 1rem;
        border-radius: 8px;
        border: 1px solid #ccc;
      }

      @keyframes scroll {
        0% {
          transform: translateX(0);
        }
        100% {
          transform: translateX(-50%);
        }
      }
      .banner-single {
        max-width: 1000px; /* 他のセクションの幅に合わせて調整 */
        margin: 2rem auto; /* 上下余白と中央寄せ */
        padding: 0 1rem; /* スマホ対策の横パディング */
        text-align: center;
      }

      .banner-img {
        max-width: 100%;
        height: auto;
        border-radius: 8px;
        box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
      }
      .column-list {
        display: flex;
        flex-wrap: wrap;
        gap: 2rem;
        justify-content: center;
        max-width: 1200px;
        margin: 2rem auto;
      }

      .column-item {
        background: #f8faff;
        padding: 1rem;
        border-radius: 8px;
        width: 100%;
        max-width: 500px;
        box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
        text-align: left;
      }

      .column-item img {
        width: 100%;
        height: auto;
        border-radius: 6px;
        margin-bottom: 0.8rem;
      }

      .column-item h3 {
        font-size: 1.2rem;
        margin-bottom: 0.5rem;
        color: #00008b;
      }

      .column-item p {
        font-size: 0.95rem;
        line-height: 1.6;
        color: #333;
        margin-bottom: 0.5rem;
      }

      .column-item a {
        color: #4169e1;
        text-decoration: underline;
        font-weight: bold;
        font-size: 0.95rem;
      }
      .column-button {
        max-width: 1200px;
        margin: 1rem auto 0;
        text-align: right;
        padding-right: 1rem;
      }

      .column-button a {
        display: inline-block;
        background-color: #00008b;
        color: white;
        padding: 0.6rem 1.2rem;
        border-radius: 4px;
        text-decoration: none;
        font-weight: bold;
        font-size: 0.95rem;
        transition: background 0.3s;
      }

      .column-button a:hover {
        background-color: #4169e1;
      }
      @media (max-width: 768px) {
        .hero h1 {
          font-size: 1.6rem; /* 修正前と同程度 */
        }

        .hero-subtitle {
          font-size: 1.1rem; /* 修正前と同程度 */
        }
      }
      .responsive-mainimg {
        width: 100%;
        height: auto;
        display: block;
      }

      @media (max-width: 768px) {
        .hero {
          height: 35vh; /* ← 例：スマホ時は高さを35%に */
        }
      }
      #contact-button {
        position: fixed;
        bottom: 20px;
        left: 20px; /* ← 左下に変更 */
        background: #ff8c00;
        color: white;
        padding: 0.8rem 1.2rem;
        border-radius: 5px;
        font-size: 1rem;
        font-weight: bold;
        text-decoration: none;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
        opacity: 0;
        visibility: hidden;
        transition:
          opacity 0.5s ease,
          visibility 0.5s ease;
        z-index: 1000;
      }

      #contact-button.show {
        opacity: 1;
        visibility: visible;
      }
      @media (min-width: 769px) {
        #benefits li h3 {
          font-size: 1.8rem; /* お好みで 1.6rem や 1.8rem に調整可 */
        }
      }
      @media (min-width: 769px) {
        nav a {
          font-size: 1rem;
        }
      }

      @media (max-width: 768px) {
        nav a {
          font-size: 1.2rem; /* モバイルでは読みやすさ重視でやや大きめに */
        }
      }
      @media (max-width: 768px) {
        nav a {
          font-size: 1.1rem;
          text-align: center;
          width: 100%;
        }
      }

      .company-profile {
        max-width: 1000px;
        margin: 2rem auto;
        padding: 0 1rem;
      }

      .company-profile h2 {
        text-align: center;
        color: #00008b;
        font-size: 2rem;
        margin-bottom: 1.5rem;
      }

      .company-info {
        background: #f8faff;
        padding: 2rem;
        border-radius: 8px;
        box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
      }

      .company-info table {
        width: 100%;
        border-collapse: collapse;
      }

      .company-info th,
      .company-info td {
        text-align: left;
        padding: 0.6rem 0.8rem;
        border-bottom: 1px solid #ccc;
        vertical-align: top;
      }

      .company-intro {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  margin-top: 2rem;
  align-items: center; /* ← `flex-start` → `center` に変更 */
}
@media (max-width: 768px) {
  .company-intro {
    flex-direction: column;
    align-items: center;
    text-align: center; /* ← テキストも中央に寄せるとバランス良し */
  }

  .company-text {
    padding: 0 1rem;
  }
}
      .company-intro img {
  max-width: 350px; /* ← 300px → 350px */
  width: 100%;
}

      .company-text {
        flex: 1;
      }

      @media (max-width: 768px) {
        .company-intro {
          flex-direction: column;
          align-items: center;
        }

        .company-text {
          text-align: left;
        }
      }
      .works-list {
        display: flex;
        gap: 1.5rem;
        flex-wrap: wrap;
        justify-content: center;
        max-width: 1200px;
        margin: 0 auto;
      }

      .works-item {
        flex: 1;
        min-width: 250px;
        max-width: 350px;
        text-align: center;
        background: #f8faff;
        padding: 1rem;
        border-radius: 8px;
        box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
      }

      .works-item img {
        width: 100%;
        height: auto;
        border-radius: 6px;
        margin-bottom: 0.8rem;
      }

      .works-item p {
  font-size: 0.95rem;
  color: #333;
  text-align: left; /* ← これを追加 */
}
@media (max-width: 768px) {
  .company-info table {
    display: block;
    width: 100%;
  }

  .company-info tr {
    display: flex;
    flex-wrap: nowrap;
    border-bottom: 1px solid #ccc; /* ← 行ごとに1本の区切り線 */
    padding: 0.5rem 0;
  }

  .company-info th, .company-info td {
    border-bottom: none; /* ← 各セルの区切り線を削除 */
    padding: 0.5rem;
    vertical-align: middle;
  }

  .company-info th {
    width: 35%;
    font-weight: bold;
  }

  .company-info td {
    width: 65%;
  }
}