  <style>
    body, html {
      margin: 0;
      padding: 0;
      height: 100%;
      font-family: 'Noto Sans', sans-serif;
    }

#site-header {
  position: fixed;
  top: 0;
  width: 100%;
  background: rgba(255, 255, 255, 0.95);
  z-index: 1000;
  transform: translateY(-100%);
  transition: transform 0.3s ease;
  box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
#site-header.active {
  transform: translateY(0);
}
.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1rem 2rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.nav-logo {
  font-weight: bold;
  font-size: 1.5rem;
  text-decoration: none;
  color: #333;
}
.nav-links {
  display: flex;
  gap: 1.5rem;
}
.nav-links a {
  color: #333;
  text-decoration: none;
  font-weight: 500;
  position: relative;
}
.nav-links a.active::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 100%;
  height: 2px;
  background: #000;
}

/* ハンバーガーメニュー */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}
.hamburger span {
  display: block;
  width: 25px;
  height: 3px;
  background: #333;
  border-radius: 3px;
}

/* モバイル対応 */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    background: #fff;
    position: absolute;
    top: 60px;
    right: 20px;
    padding: 1rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  }
  .nav-links.open {
    display: flex;
  }
  .hamburger {
    display: flex;
  }
}



    
    .hero-section {
      position: relative;
      width: 100%;
      height: 100vh;
      overflow: hidden;
    }

    #heroVideo {
      position: absolute;
      top: 50%;
      left: 50%;
      min-width: 100%;
      min-height: 100%;
      object-fit: cover;
      transform: translate(-50%, -50%);
      z-index: 0;
    }

    .hero-overlay {
      position: absolute;
      width: 100%;
      height: 100%;
      background: rgba(0,0,0,0.3);
      z-index: 1;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      color: white;
      text-align: center;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      height: 100vh;
      padding: 2rem;
      box-sizing: border-box;
    }

    .catchphrase {
      font-size: 2.5rem;
      opacity: 0;
    }

    .hero-logo {
      width: 300px;
      max-width: none;
      opacity: 0;
      margin: 1rem auto;
      display: block;
    }

    .scroll-down {
      margin-top: 1rem;
      display: inline-block;
      font-size: 1.5rem;
      animation: bounce 2s infinite;
      color: white;
    }

    .vision-section {
      background: #fff;
      padding: 4rem 2rem;
      text-align: center;
      opacity: 0;
    }

    .vision-section h2 {
      font-size: 4rem;
      margin-bottom: 1rem;
    }

    .vision-section p {
      font-size: 1rem;
      color: #333;
      max-width: 800px;
      margin: 0 auto;
    }

    .services-section {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 1rem;
      padding: 4rem 2rem;
    }

.service-card {
  flex: 1 1 45%;
  max-width: 45%;
  height: 180px;
  color: white;
  padding: 1.5rem;
  border-radius: 12px;
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(20px);
  transition: filter 0.3s ease;
}

    .service-card::before {
      content: "";
      position: absolute;
      top: 0; left: 0;
      width: 100%; height: 100%;
      background: rgba(0, 0, 0, 0.3);
      transition: background 0.3s ease;
      z-index: 1;
    }

    .service-card:hover::before {
      background: rgba(0, 0, 0, 0.6); /* 暗くする方が視認性高い */
    }

    .service-card > * {
      position: relative;
      z-index: 2;
    }

    .service-card h3 {
      margin-top: 0;
    }

    .service-card:nth-child(1) { background-image: url('image/bg_it.webp'); }
    .service-card:nth-child(2) { background-image: url('image/bg_foreign.webp'); }
    .service-card:nth-child(3) { background-image: url('image/bg_finance.webp'); }
    .service-card:nth-child(4) { background-image: url('image/bg_invest.webp'); }
    .service-card:nth-child(5) { background-image: url('image/bg_estate.webp'); }
    .service-card:nth-child(6) { background-image: url('image/bg_ad.webp'); }
    .service-card:nth-child(7) { background-image: url('image/bg_event.webp'); }


.message-section {
  background: #f5f5f5;
  padding: 4rem 2rem;
  text-align: center;
}

.message-section h2 {
  font-size: 2rem;
  margin-bottom: 2rem;
  color: #222;
}

.message-section p {
  font-size: 1rem;
  line-height: 1.8;
  max-width: 800px;
  margin: 1rem auto;
  color: #333;
}

.message-section .sign {
  margin-top: 2rem;
  font-weight: bold;
  font-size: 1.1rem;
  color: #000;
}

.works-section {
  padding: 4rem 2rem;
  background: #fff;
  text-align: center;
}

.works-section h2 {
  font-size: 2rem;
  margin-bottom: 2rem;
}

.swiper-slide {
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 8px rgba(0,0,0,0.1);
  text-align: left;
}

.swiper-slide img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.slide-caption {
  padding: 1rem;
}

.slide-caption .company {
  font-weight: bold;
  font-size: 1rem;
  margin: 0;
}

.slide-caption .info {
  font-size: 0.9rem;
  color: #666;
}

/* hover時ズーム */
.swiper-slide:hover img {
  transform: scale(1.05);
  transition: transform 0.4s ease;
}

/* グラデーションレイヤー */
.swiper-slide {
  position: relative;
}
.swiper-slide::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.15), rgba(0,0,0,0.4));
  z-index: 1;
  pointer-events: none;
}

.swiper-slide img,
.slide-caption {
  position: relative;
  z-index: 2;
}

.news-section {
  padding: 4rem 2rem;
  background: #f9f9f9;
  text-align: center;
}
.news-section h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}

.slide-caption .excerpt {
  font-size: 0.9rem;
  color: #444;
  margin: 0.5rem 0;
}


    
#news-list {
  list-style: none;
  padding: 0;
  max-width: 800px;
  margin: 0 auto;
}
#news-list li {
  margin-bottom: 1.5rem;
  font-size: 1rem;
}
#news-list a {
  color: #0066cc;
  text-decoration: none;
}
    
.contact-section {
  background: #f2f2f2;
  padding: 4rem 2rem;
  text-align: center;
}
.contact-section h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
}
.contact-section p {
  font-size: 1rem;
  margin-bottom: 1.5rem;
}
.contact-form {
  max-width: 600px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.75rem;
  border: 1px solid #ccc;
  border-radius: 6px;
  font-size: 1rem;
}
.contact-form button {
  padding: 0.75rem;
  font-size: 1rem;
  background-color: #333;
  color: white;
  border: none;
  border-radius: 6px;
  cursor: pointer;
}
.contact-form button:hover {
  background-color: #555;
}
.contact-info {
  margin-top: 2rem;
  font-size: 1rem;
}
.contact-info a {
  color: #0066cc;
  text-decoration: none;
}
.contact-info a:hover {
  text-decoration: underline;
}

.contact-btn {
  display: inline-block;
  margin-top: 1.5rem;
  padding: 0.75rem 2rem;
  background-color: #333;
  color: #fff;
  font-size: 1rem;
  border-radius: 6px;
  text-decoration: none;
  transition: background-color 0.3s ease;
}
.contact-btn:hover {
  background-color: #555;
}

    .swiper-slide img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

    

    
    @keyframes bounce {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(10px); }
    }

@media (max-width: 768px) {
  .service-card {
    flex: 1 1 100%;
    max-width: 100%;
  }
}
    
  </style>