:root {
    --primary: #e8b423;
    --secondary: #3a4256;
    --dark: #1e2130;
    --light: #f5f5f5;
    --accent: #ff5722;
    --text-dark: #222;
    --text-light: #f5f5f5;
    --border-radius: 8px;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
  }

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

  .container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
  }

  section {
    padding: 80px 0;
    position: relative;
  }

  h1, h2, h3, h4, h5, h6 {
    margin-bottom: 20px;
    color: var(--text-dark);
    font-weight: 700;
    line-height: 1.2;
  }

  h1 {
    font-size: 3rem;
    margin-bottom: 30px;
  }

  h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 50px;
  }

  h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
  }

  p {
    margin-bottom: 20px;
    line-height: 1.6;
  }

  a {
    text-decoration: none;
    color: var(--primary);
    transition: var(--transition);
  }

  a:hover {
    color: var(--accent);
  }

  ul {
    list-style: none;
  }

  .bg-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
    opacity: 0.2;
  }

  .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
  }

  /* Hero Section */
  .premium-hero {
    padding: 150px 0;
    text-align: center;
    background-color: var(--dark);
    color: var(--text-light);
  }

  .premium-hero h1 {
    color: var(--text-light);
    font-size: 3.5rem;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    margin-bottom: 20px;
  }

  .hero-subtitle {
    font-size: 1.5rem;
    max-width: 800px;
    margin: 0 auto 30px;
    color: var(--text-light);
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
  }

  /* Benefits Section */
  .premium-benefits {
    background-color: var(--light);
  }

  .benefits-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 30px;
  }

  @media (min-width: 768px) {
    .benefits-grid {
      grid-template-columns: repeat(2, 1fr);
    }
  }

  @media (min-width: 1024px) {
    .benefits-grid {
      grid-template-columns: repeat(4, 1fr);
    }
  }

  .benefit-card {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 30px;
    text-align: center;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
  }

  .benefit-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
  }

  .benefit-card i {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 20px;
  }

  /* Premium Plans Section */
  .premium-plans {
    background-color: var(--dark);
    color: var(--text-light);
  }

  .premium-plans h2 {
    color: var(--text-light);
  }

  .plans-container {
    display: flex;
    flex-direction: column;
    gap: 30px;
    justify-content: center;
    align-items: center;
  }

  @media (min-width: 1024px) {
    .plans-container {
      flex-direction: row;
      align-items: stretch;
    }
  }

  .plan-card {
    background-color: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    width: 100%;
    max-width: 350px;
    box-shadow: var(--box-shadow);
    display: flex;
    flex-direction: column;
    color: var(--text-dark);
    transition: var(--transition);
  }

  .plan-card:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.3);
  }

  .plan-card.featured {
    transform: scale(1.05);
    border: 3px solid var(--primary);
    position: relative;
  }

  .plan-card.featured:hover {
    transform: scale(1.1);
  }

  .best-value {
    position: absolute;
    top: 0;
    right: 0;
    background-color: var(--primary);
    color: var(--dark);
    padding: 5px 15px;
    font-weight: bold;
    font-size: 0.8rem;
    border-bottom-left-radius: var(--border-radius);
  }

  .plan-header {
    background-color: var(--secondary);
    color: white;
    padding: 30px 20px;
    text-align: center;
    position: relative;
  }

  .plan-header h3 {
    color: white;
    margin-bottom: 5px;
  }

  .plan-duration {
    font-size: 1.2rem;
    opacity: 0.8;
  }

  .plan-features {
    padding: 30px;
    flex-grow: 1;
  }

  .plan-features li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
  }

  .plan-features li i {
    color: var(--primary);
    margin-right: 10px;
  }

  .btn-premium {
    display: block;
    background-color: var(--primary);
    color: var(--dark);
    text-align: center;
    padding: 15px 20px;
    margin: 0 30px 30px;
    border-radius: var(--border-radius);
    font-weight: bold;
    transition: var(--transition);
  }

  .btn-premium:hover {
    background-color: var(--accent);
    color: white;
  }

  /* Premium Tanks Section */
  .premium-tanks {
    background-color: var(--light);
  }

  .section-intro {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 50px;
    font-size: 1.1rem;
  }

  .tanks-showcase {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
  }

  @media (min-width: 768px) {
    .tanks-showcase {
      grid-template-columns: repeat(2, 1fr);
    }
  }

  @media (min-width: 1024px) {
    .tanks-showcase {
      grid-template-columns: repeat(3, 1fr);
    }
  }

  .tank-card {
    background-color: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
  }

  .tank-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
  }

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

  .tank-card h3, .tank-card p {
    padding: 0 20px;
  }

  .tank-card h3 {
    margin-top: 20px;
  }

  .tank-card p {
    padding-bottom: 20px;
  }

  .tank-info {
    margin-top: 50px;
    text-align: center;
    padding: 20px;
    background-color: rgba(0, 0, 0, 0.05);
    border-radius: var(--border-radius);
  }

  /* Testimonials Section */
  .premium-testimonials {
    background-color: var(--secondary);
    color: var(--text-light);
  }

  .premium-testimonials h2 {
    color: var(--text-light);
  }

  .testimonials-slider {
    position: relative;
    overflow: hidden;
  }

  .testimonial {
    padding: 20px;
  }

  .testimonial-content {
    background-color: white;
    border-radius: var(--border-radius);
    padding: 30px;
    color: var(--text-dark);
    box-shadow: var(--box-shadow);
  }

  .testimonial-author {
    display: flex;
    align-items: center;
    margin-top: 20px;
  }

  .testimonial-author img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 15px;
  }

  .author-info h4 {
    margin-bottom: 5px;
  }

  .author-info p {
    opacity: 0.7;
    margin-bottom: 0;
    font-size: 0.9rem;
  }

  .testimonial-controls {
    display: flex;
    justify-content: center;
    margin-top: 30px;
    gap: 20px;
  }

  .testimonial-controls button {
    background-color: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: var(--transition);
  }

  .testimonial-controls button:hover {
    background-color: var(--primary);
    color: var(--dark);
  }

  /* FAQ Section */
  .premium-faq {
    background-color: var(--light);
  }

  .faq-container {
    max-width: 800px;
    margin: 0 auto;
  }

  .faq-item {
    margin-bottom: 15px;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--box-shadow);
  }

  .faq-question {
    width: 100%;
    background-color: white;
    border: none;
    padding: 20px;
    text-align: left;
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    transition: var(--transition);
  }

  .faq-question:hover {
    background-color: var(--primary);
    color: var(--dark);
  }

  .faq-question i {
    transition: var(--transition);
  }

  .faq-question.active i {
    transform: rotate(45deg);
  }

  .faq-answer {
    background-color: white;
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .faq-answer.active {
    padding: 20px;
    max-height: 500px;
  }

  /* CTA Section */
  .premium-cta {
    text-align: center;
    padding: 100px 0;
    background-color: var(--dark);
    color: var(--text-light);
  }

  .premium-cta h2 {
    color: var(--text-light);
    margin-bottom: 20px;
  }

  .premium-cta p {
    max-width: 800px;
    margin: 0 auto 40px;
    font-size: 1.2rem;
  }

  .btn-premium-large {
    display: inline-block;
    background-color: var(--primary);
    color: var(--dark);
    font-size: 1.2rem;
    font-weight: bold;
    padding: 15px 40px;
    border-radius: var(--border-radius);
    transition: var(--transition);
  }

  .btn-premium-large:hover {
    background-color: var(--accent);
    color: white;
    transform: scale(1.05);
  }

  @media (max-width: 768px) {
    h1 {
      font-size: 2.5rem;
    }

    h2 {
      font-size: 2rem;
    }

    .premium-hero {
      padding: 100px 0;
    }

    .hero-subtitle {
      font-size: 1.2rem;
    }

    section {
      padding: 60px 0;
    }
  }