body {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      font-family: 'Hiragino Sans', 'Hiragino Kaku Gothic ProN', 'Noto Sans JP', sans-serif;
      color: #1a1a1a;
      background: #e8f0f7;
      min-height: 100%;
    }
    
    * {
      box-sizing: border-box;
    }
    
    /* Header */
    .header {
      background: #ffffff;
      padding: 20px 5%;
      box-shadow: 0 2px 8px rgba(0,0,0,0.05);
      position: fixed;
      top: -100px;
      left: 0;
      right: 0;
      z-index: 100;
      transition: top 0.3s ease-in-out;
    }
    
    .header.visible {
      top: 0;
    }
    
    .header-content {
      max-width: 1200px;
      margin: 0 auto;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    
    .logo {
      font-size: 14px;
      font-weight: 600;
      color: #0052cc;
      line-height: 0.6;
      max-width: 280px;
      white-space: pre-line;
    }
    
    .logo a {
      color: #0052cc;
      text-decoration: none;
    }
    
    
    .nav {
      display: flex;
      gap: 32px;
    }
    .nav a {
      color: #333;
      text-decoration: none;
      font-weight: 500;
      transition: color 0.3s;
    }
    
    .nav a:hover {
      color: #FF6B35;
    }
    
    /* Hero Section */
    .hero {
      background: linear-gradient(135deg, #0052cc 0%, #003d99 100%);
      color: white;
      padding: 80px 5% 80px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    
    .hero::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: url('/cnp/gas-lp/img/mainvisual.jpg') center/cover no-repeat;
      opacity: 1;
      z-index: 0;
    }
    
    .hero::after {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(0, 120, 255, 0.5);
      z-index: 1;
    }
    
    @keyframes pulse-slow {
      0%, 100% {
        transform: scale(1);
        opacity: 1;
      }
      50% {
        transform: scale(1.05);
        opacity: 0.8;
      }
    }
    
    .hero-content {
      max-width: 900px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }
    
    .hero-title {
      font-size: 52px;
      font-weight: 700;
      margin-bottom: 32px;
      line-height: 1.5;
      text-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    }
    
    
    .hero-description {
      font-size: 20px;
      line-height: 1.9;
      margin-bottom: 40px;
      opacity: 0.95;
      text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    }
    
    /* Hero Keywords - decorative badges */
    .hero-keywords {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-bottom: 24px;
      padding: 0 20px;
    }
    
    .keyword-badge {
      background: rgba(255, 255, 255, 0.25);
      backdrop-filter: blur(10px);
      color: #ffffff;
      padding: 12px 24px;
      border-radius: 30px;
      font-size: 18px;
      font-weight: 700;
      border: 2px solid rgba(255, 255, 255, 0.6);
      display: inline-flex;
      align-items: center;
      gap: 8px;
      pointer-events: none;
      box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
      letter-spacing: 0.5px;
      white-space: nowrap;
    }
    
    .keyword-badge::before {
      content: "●";
      font-size: 12px;
      opacity: 1;
    }
    
    .hero-cta-button {
      background: #FF6B35;
      color: #ffffff;
      padding: 24px 100px;
      font-size: 22px;
      font-weight: 700;
      border: none;
      border-radius: 50px;
      cursor: pointer;
      transition: all 0.3s;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
      position: relative;
      min-width: 380px;
    }
    
    .hero-cta-button:hover {
      background: #FF8C42;
      transform: translateY(-4px) scale(1.05);
      box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
    }
    
    /* Problems Section */
    .problems {
      padding: 80px 5%;
      background: #e8f0f7;
    }
    
    .problems-content {
      max-width: 1000px;
      margin: 0 auto;
    }
    
    .section-title {
      font-size: 42px;
      font-weight: 700;
      text-align: center;
      margin-bottom: 48px;
      color: #1a1a1a;
    }
    
    .problems-list {
      background: white;
      padding: 40px;
      border-radius: 16px;
      box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    }
    
    .problem-item {
      padding: 20px 0;
      border-bottom: 1px solid #e0e0e0;
      line-height: 1.8;
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 18px;
    }
    
    .problem-item:last-child {
      border-bottom: none;
    }
    
    .problem-item::before {
      content: "";
      width: 32px;
      height: 32px;
      min-width: 32px;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 64 64' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M 32 10 C 28 18 24 24 24 32 C 24 42 27 50 32 50 C 37 50 40 42 40 32 C 40 24 36 18 32 10 Z' stroke='%23FF6B35' stroke-width='2.5' fill='none' stroke-linejoin='round'/%3E%3Cpath d='M 32 20 C 30 24 28 28 28 32 C 28 38 29.5 42 32 42 C 34.5 42 36 38 36 32 C 36 28 34 24 32 20 Z' fill='%23FF6B35'/%3E%3Ccircle cx='32' cy='36' r='2' fill='%23FF6B35'/%3E%3C/svg%3E");
      background-size: contain;
      background-repeat: no-repeat;
      background-position: center;
      margin-top: 2px;
    }
    
    .problems-footer {
      text-align: center;
      margin-top: 40px;
      font-size: 18px;
      font-weight: 600;
      color: #333;
    }
    
    /* CTA Banner */
    .cta-banner {
      background: linear-gradient(135deg, #0052cc 0%, #003d99 100%);
      color: white;
      padding: 48px 5%;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    
    .cta-banner::before {
      content: "💡";
      position: absolute;
      font-size: 120px;
      opacity: 0.1;
      top: 50%;
      left: 10%;
      transform: translateY(-50%);
    }
    
    .cta-banner::after {
      content: "✓";
      position: absolute;
      font-size: 120px;
      opacity: 0.1;
      top: 50%;
      right: 10%;
      transform: translateY(-50%);
    }
    
    .cta-banner-text {
      font-size: 30px;
      font-weight: 700;
      line-height: 1.6;
      max-width: 900px;
      margin: 0 auto;
      position: relative;
      z-index: 1;
    }
    
    /* Case Studies */
    .cases {
      padding: 80px 5%;
      background: white;
    }
    
    .cases-content {
      max-width: 1200px;
      margin: 0 auto;
    }
    
    .case-card {
      background: #f5f9fc;
      border-radius: 16px;
      padding: 0;
      margin-bottom: 40px;
      border-left: 6px solid #FF6B35;
      transition: transform 0.3s, box-shadow 0.3s;
      overflow: hidden;
      display: grid;
      grid-template-columns: 320px 1fr;
      gap: 0;
    }
    
    .case-card:hover {
      transform: translateX(8px);
      box-shadow: -4px 4px 16px rgba(255, 107, 53, 0.15);
    }
    
    .case-card:nth-child(even) {
      grid-template-columns: 1fr 320px;
      border-left: none;
      border-right: 6px solid #FF6B35;
    }
    
    .case-card:nth-child(even):hover {
      transform: translateX(-8px);
      box-shadow: 4px 4px 16px rgba(255, 107, 53, 0.15);
    }
    
    .case-card:nth-child(even) .case-image {
      order: 2;
    }
    
    .case-card:nth-child(even) .case-content {
      order: 1;
    }
    
    .case-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      min-height: 280px;
    }
    
    .case-content {
      padding: 48px;
    }
    
    .case-title {
      font-size: 32px;
      font-weight: 700;
      color: #FF6B35;
      margin-bottom: 24px;
    }
    
    .case-section {
      margin-bottom: 24px;
    }
    
    .case-label {
      font-size: 18px;
      font-weight: 700;
      color: #666;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
    }
    
    .case-label::before {
      content: "■";
      color: #FF6B35;
      margin-right: 8px;
    }
    
    .case-text {
      font-size: 18px;
      line-height: 1.8;
      color: #333;
    }
    
    .case-arrow {
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 24px 0;
      position: relative;
    }
    
    .case-arrow::before {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      height: 2px;
      background: linear-gradient(to right, transparent, #FF6B35, transparent);
      opacity: 0.3;
    }
    
    .case-arrow-icon {
      background: #FF6B35;
      color: white;
      width: 48px;
      height: 48px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      z-index: 1;
      box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
      animation: bounce 2s infinite;
    }
    
    @keyframes bounce {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(8px); }
    }
    
    /* Scroll indicator */
    .scroll-indicator {
      position: absolute;
      bottom: -50px;
      left: 50%;
      transform: translateX(-50%);
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 12px;
      animation: float 2.5s ease-in-out infinite;
      cursor: pointer;
      z-index: 10;
    }
    
    .scroll-line {
      width: 2px;
      height: 40px;
      background: linear-gradient(to bottom, rgba(255, 255, 255, 0), rgba(255, 255, 255, 0.8));
      position: relative;
    }
    
    .scroll-line::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 50%;
      transform: translateX(-50%);
      width: 0;
      height: 0;
      border-left: 6px solid transparent;
      border-right: 6px solid transparent;
      border-top: 8px solid rgba(255, 255, 255, 0.8);
    }
    
    @keyframes float {
      0%, 100% {
        transform: translateX(-50%) translateY(0);
      }
      50% {
        transform: translateX(-50%) translateY(8px);
      }
    }
    
    /* Solutions Section */
    .solutions {
      padding: 80px 5%;
      background: #e8f0f7;
    }
    
    .solutions-content {
      max-width: 1200px;
      margin: 0 auto;
    }
    
    .solutions-intro {
      text-align: center;
      margin-bottom: 60px;
      padding: 0;
    }
    
    .solutions-tagline {
      font-size: 24px;
      font-weight: 500;
      color: #666;
      margin-bottom: 32px;
      letter-spacing: 2px;
    }
    
    .solutions-description {
      font-size: 22px;
      line-height: 2;
      color: #333;
      font-weight: 400;
      max-width: 900px;
      margin: 0 auto;
    }
    
    .solutions-description strong {
      color: #0052cc;
      font-size: 48px;
      display: block;
      font-weight: 900;
      margin-bottom: 24px;
      letter-spacing: 6px;
      line-height: 1.4;
    }
    
    .solutions-description strong span {
      color: #FF6B35;
      font-size: 52px;
      line-height: 1;
    }
    
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 32px;
      margin-top: 48px;
    }
    
    .solution-card {
      background: white;
      padding: 40px 32px;
      border-radius: 16px;
      box-shadow: 0 2px 12px rgba(0,0,0,0.08);
      transition: all 0.3s;
      border-top: 4px solid #FF6B35;
    }
    
    .solution-card:hover {
      transform: translateY(-8px);
      box-shadow: 0 12px 24px rgba(255, 107, 53, 0.2);
    }
    
    .solution-icon {
      width: 80px;
      height: 80px;
      margin: 0 auto 24px;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    
    .solution-icon svg {
      width: 100%;
      height: 100%;
    }
    
    .solution-title {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 16px;
      color: #0052cc;
    }
    
    .solution-description {
      font-size: 17px;
      line-height: 1.8;
      color: #555;
    }
    
    /* Clients Section */
    .clients {
      padding: 80px 5%;
      background: white;
    }
    
    .clients-content {
      max-width: 1000px;
      margin: 0 auto;
    }
    
    .clients-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      margin-top: 48px;
    }
    
    .client-logo-box {
      background: #f5f9fc;
      border-radius: 12px;
      padding: 32px;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 2px solid #e0e0e0;
      min-height: 140px;
    }
    
    .client-logo-placeholder {
      color: #999;
      font-size: 14px;
      text-align: center;
      font-weight: 500;
    }
    
    /* CTA Section */
    .cta-section {
      background: linear-gradient(135deg, #003d99 0%, #0052cc 100%);
      color: white;
      padding: 80px 5%;
      text-align: center;
    }
    
    .cta-section-content {
      max-width: 800px;
      margin: 0 auto;
    }
    
    .cta-section-title {
      font-size: 32px;
      font-weight: 700;
      margin-bottom: 40px;
    }
    
    .cta-buttons {
      display: flex;
      gap: 24px;
      justify-content: center;
      flex-wrap: wrap;
    }
    
    .cta-button {
      background: #FF6B35;
      color: #ffffff;
      padding: 18px 48px;
      font-size: 18px;
      font-weight: 600;
      border: none;
      border-radius: 50px;
      cursor: pointer;
      transition: all 0.3s;
      box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
    }
    
    .cta-button:hover {
      background: #FF8C42;
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
    }
    
    /* FAQ Section */
    .faq {
      padding: 80px 5%;
      background: white;
    }
    
    .faq-content {
      max-width: 900px;
      margin: 0 auto;
    }
    
    .faq-item {
      background: #f5f9fc;
      padding: 32px;
      border-radius: 12px;
      margin-bottom: 24px;
      border-left: 4px solid #0052cc;
      transition: border-color 0.3s;
    }
    
    .faq-item:hover {
      border-left-color: #FF6B35;
    }
    
    .faq-question {
      font-size: 20px;
      font-weight: 700;
      color: #0052cc;
      margin-bottom: 16px;
    }
    
    .faq-answer {
      font-size: 18px;
      line-height: 1.8;
      color: #333;
    }
    
    /* Contact Form Section */
    .contact-form-section {
      padding: 80px 5%;
      background: linear-gradient(135deg, #e8f0f7 0%, #d0e4f5 100%);
      position: relative;
      overflow: hidden;
    }
    
    .contact-form-content {
      max-width: 900px;
      margin: 0 auto;
      position: relative;
      z-index: 1;
    }
    
    .form-container {
      background: white;
      padding: 40px;
      border-radius: 16px;
      box-shadow: 0 8px 32px rgba(0, 82, 204, 0.15);
      margin-top: 40px;
      position: relative;
      border: 1px solid rgba(0, 82, 204, 0.1);
    }

    
    /* Material Form Section */
    .form-section {
      background: white;
      border-radius: 16px;
      padding: 48px;
      box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    }
    
    .form-title {
      font-size: 28px;
      font-weight: 700;
      color: #0052cc;
      margin-bottom: 32px;
      text-align: center;
    }
    
    .resource-name {
      font-size: 22px;
      font-weight: 700;
      color: #FF6B35;
      margin-bottom: 24px;
      text-align: center;
    }
    
    .resource-info {
      display: flex;
      gap: 24px;
      align-items: center;
      margin-bottom: 40px;
      padding: 24px;
      background: #f8fbfd;
      border-radius: 12px;
      border: 1px solid #e0eef7;
    }
    
    .resource-thumbnail {
      flex-shrink: 0;
      width: 200px;
      height: 140px;
    }
    
    .resource-description {
      flex: 1;
    }
    
    .resource-description p {
      font-size: 15px;
      line-height: 1.8;
      color: #555;
      margin: 0;
    }
    
    .form-subtitle {
      font-size: 16px;
      color: #666;
      text-align: center;
      margin-bottom: 40px;
    }
    
    .satori-form-container {
      margin: 0 auto;
    }
    
    @media (max-width: 768px) {
      .resource-info {
        flex-direction: column;
        text-align: center;
      }
      
      .resource-thumbnail {
        width: 180px;
        height: 126px;
      }
    }
    
    
    /* Footer */
    .footer {
      background: #f0f4f8;
      color: #333333;
      padding: 60px 5% 40px;
    }
    
    .footer-content {
      max-width: 1200px;
      margin: 0 auto;
    }
    
    .footer-company-info {
      margin-bottom: 48px;
      text-align: left;
    }
    
    .footer-heading {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 32px;
      color: #0052cc;
      border-bottom: 2px solid #0052cc;
      padding-bottom: 12px;
    }
    
    .company-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
    }
    
    .company-details {
      line-height: 2;
    }
    
    .company-details p {
      margin-bottom: 24px;
    }
    
    .company-details strong {
      color: #0052cc;
      font-weight: 600;
    }
    
    .office-info {
      line-height: 2;
    }
    
    .office-info p {
      margin-bottom: 24px;
    }
    
    .office-info strong {
      color: #0052cc;
      font-weight: 600;
    }
    
    .certifications {
      margin-top: 32px;
      padding-top: 24px;
      border-top: 1px solid #d0d0d0;
    }
    
    .certification-logos {
      display: flex;
      gap: 16px;
      margin-top: 16px;
    }
    
    .certification-logo-box {
      background: #ffffff;
      border: none;
      padding: 16px;
      flex: 1;
      display: flex;
      align-items: center;
      justify-content: center;
      min-height: 100px;
    }
    
    .certification-logo-placeholder {
      color: #999;
      font-size: 13px;
      font-weight: 500;
      text-align: center;
    }
    
    .footer-links {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      margin-top: 32px;
      padding-top: 32px;
      border-top: 1px solid #d0d0d0;
    }
    
    .footer-link {
      color: #0052cc;
      text-decoration: none;
      font-size: 14px;
      transition: color 0.3s;
    }
    
    .footer-link:hover {
      color: #FF6B35;
    }
    
    .footer-divider {
      color: #999999;
      font-size: 14px;
    }
    
    .footer-text {
      font-size: 14px;
      color: #666666;
      text-align: center;
      margin-top: 24px;
    }
    
    /* Fixed Side Banner */
    .fixed-side-banner {
      position: fixed;
      right: 0;
      top: 50%;
      transform: translateY(-50%) translateX(100%);
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 12px;
      transition: transform 0.6s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    }
    
    .fixed-side-banner.visible {
      transform: translateY(-50%) translateX(0);
    }
    
    .fixed-side-banner.hidden {
      transform: translateY(-50%) translateX(100%);
    }
    
    .side-banner-button {
      background: #FF6B35;
      color: #ffffff;
      border: none;
      border-radius: 8px;
      padding: 20px 12px 50px 12px;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
      transition: all 0.3s;
      writing-mode: vertical-rl;
      text-orientation: upright;
      font-size: 14px;
      font-weight: 700;
      letter-spacing: 2px;
      min-height: 180px;
      width: 48px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-decoration: none;
      line-height: 1;
      position: relative;
    }
    
    .side-banner-button::after {
      content: "▶";
      writing-mode: horizontal-tb;
      text-orientation: mixed;
      font-size: 10px;
      position: absolute;
      bottom: 24px;
      left: 50%;
      transform: translateX(-50%);
    }
    
    .side-banner-button:hover {
      background: #FF8C42;
      transform: translateX(-4px);
      box-shadow: 0 6px 16px rgba(255, 107, 53, 0.4);
    }
    
    .side-banner-button.secondary {
      background: #0052cc;
    }
    
    .side-banner-button.secondary:hover {
      background: #0066ff;
    }

    .back-button-space {
      text-align: center;
      margin-top:30px;
    }

    .back-button {
      display: inline-block;
      background: #0052cc;
      color: white;
      padding: 16px 48px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: 600;
      font-size: 16px;
      transition: background 0.3s;
      border: none;
      cursor: pointer;
    }
    
    .back-button:hover {
      background: #003d99;
    }
    
    /* Responsive */
    @media (max-width: 768px) {
      .solutions-description strong {
        font-size: 20px;
        letter-spacing: 1px;
        white-space: nowrap;
      }
      
      .solutions-description strong span {
        font-size: 22px;
      }
      
      .fixed-side-banner {
        right: 0;
        gap: 8px;
      }
      
      .side-banner-button {
        width: 42px;
        min-height: 150px;
        font-size: 13px;
        padding: 16px 10px 44px 10px;
      }
      
      .side-banner-button::after {
        bottom: 18px;
        font-size: 9px;
      }
      
      .hero-title {
        font-size: 28px !important;
        line-height: 1.6;
      }
      
      .hero-description {
        font-size: 15px;
      }
      
      .keyword-badge {
        font-size: 13px;
        padding: 8px 16px;
      }
      
      .section-title {
        font-size: 28px;
      }
      
      .nav {
        display: none;
      }
      
      .company-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      
      .case-card {
        grid-template-columns: 1fr;
      }
      
      .case-card:nth-child(even) {
        grid-template-columns: 1fr;
        border-left: 6px solid #FF6B35;
        border-right: none;
      }
      
      .case-card:nth-child(even):hover {
        transform: translateX(8px);
      }
      
      .case-card:nth-child(even) .case-image {
        order: 0;
      }
      
      .case-card:nth-child(even) .case-content {
        order: 0;
      }
      
      .case-image {
        min-height: 200px;
      }
      
      .case-content {
        padding: 32px 24px;
      }
      
      .case-title {
        font-size: 22px;
      }
      
      .solutions-grid {
        grid-template-columns: 1fr;
      }
      
      .clients-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
      }
      
      .client-logo-box {
        min-height: 120px;
        padding: 24px;
      }
      
      .cta-buttons {
        flex-direction: column;
      }
      
      .hero-keywords {
        gap: 12px;
      }
      
      .hero::before {
        opacity: 0.75;
      }
      
      .hero::after {
        opacity: 0.3;
      }
      
      .cta-banner::before,
      .cta-banner::after {
        font-size: 60px;
      }
      
      .form-container {
        padding: 24px;
      }
      
      .certification-logos {
        flex-direction: column;
      }
      
      .certification-logo-box {
        min-height: 80px;
      }
    }