:root {
      --primary-color: #f7b32b; /* Màu vàng cam */
      --secondary-color: #007bff; /* Màu xanh dương */
      --text-color: #ffffff; /* Màu chữ trắng */
      --bg-color: #1a1a1a; /* Nền tối */
      --card-bg: #2a2a2a; /* Nền thẻ tối hơn */
      --border-color: #444;
      --button-hover-bg: #e0a800;
    }

    .page-rut-tien-hd88 {
      font-family: 'Arial', sans-serif;
      color: var(--text-color);
      background-color: var(--bg-color);
      line-height: 1.6;
      padding-bottom: 80px; /* Space for floating buttons */
    }

    .page-rut-tien-hd88__section-title {
      text-align: center;
      color: var(--primary-color);
      font-size: 2.2em;
      margin-bottom: 40px;
      padding-top: 20px;
      position: relative;
    }

    .page-rut-tien-hd88__section-title::after {
      content: '';
      display: block;
      width: 80px;
      height: 4px;
      background-color: var(--primary-color);
      margin: 10px auto 0 auto;
      border-radius: 2px;
    }

    .page-rut-tien-hd88__section-description {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 50px auto;
      font-size: 1.1em;
      color: #ccc;
    }

    /* Hero Section */
    .page-rut-tien-hd88__hero-section {
      position: relative;
      height: 70vh;
      min-height: 400px;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      overflow: hidden;
      padding-top: 10px; /* Small decorative padding, body handles header-offset */
    }

    .page-rut-tien-hd88__hero-image {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
      z-index: 1;
    }

    .page-rut-tien-hd88__hero-overlay {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.7);
      z-index: 2;
    }

    .page-rut-tien-hd88__hero-content {
      position: relative;
      z-index: 3;
      max-width: 900px;
      padding: 20px;
    }

    .page-rut-tien-hd88__main-title {
      font-size: 3.5em;
      color: var(--primary-color);
      margin-bottom: 15px;
      line-height: 1.2;
      text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    }

    .page-rut-tien-hd88__subtitle {
      font-size: 1.4em;
      color: #f0f0f0;
      margin-bottom: 30px;
      max-width: 700px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-rut-tien-hd88__hero-buttons {
      display: flex;
      justify-content: center;
      gap: 20px;
    }

    .page-rut-tien-hd88__btn {
      display: inline-block;
      padding: 15px 30px;
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      transition: background-color 0.3s ease, transform 0.3s ease;
    }

    .page-rut-tien-hd88__btn--primary {
      background-color: var(--primary-color);
      color: var(--bg-color);
      border: 2px solid var(--primary-color);
    }

    .page-rut-tien-hd88__btn--primary:hover {
      background-color: var(--button-hover-bg);
      transform: translateY(-3px);
    }

    .page-rut-tien-hd88__btn--secondary {
      background-color: transparent;
      color: var(--primary-color);
      border: 2px solid var(--primary-color);
    }

    .page-rut-tien-hd88__btn--secondary:hover {
      background-color: var(--primary-color);
      color: var(--bg-color);
      transform: translateY(-3px);
    }

    /* Info Section */
    .page-rut-tien-hd88__info-section {
      padding: 60px 20px;
      max-width: 1200px;
      margin: 0 auto;
    }

    .page-rut-tien-hd88__features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 30px;
      margin-top: 40px;
    }

    .page-rut-tien-hd88__feature-item {
      background-color: var(--card-bg);
      padding: 30px;
      border-radius: 12px;
      text-align: center;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      box-sizing: border-box;
    }

    .page-rut-tien-hd88__feature-item:hover {
      transform: translateY(-10px);
      box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
    }

    .page-rut-tien-hd88__feature-icon {
      width: 100px;
      height: auto;
      margin-bottom: 20px;
      max-width: 100%;
      border-radius: 8px;
    }

    .page-rut-tien-hd88__feature-title {
      color: var(--primary-color);
      font-size: 1.5em;
      margin-bottom: 10px;
    }

    .page-rut-tien-hd88__feature-description {
      color: #ccc;
      font-size: 1em;
    }

    /* Steps Section */
    .page-rut-tien-hd88__steps-section {
      padding: 60px 20px;
      max-width: 1200px;
      margin: 0 auto;
    }

    .page-rut-tien-hd88__steps-container {
      display: flex;
      flex-direction: column;
      gap: 40px;
      margin-top: 40px;
    }

    .page-rut-tien-hd88__step-item {
      display: flex;
      align-items: center;
      background-color: var(--card-bg);
      border-radius: 12px;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
      overflow: hidden;
      box-sizing: border-box;
    }

    .page-rut-tien-hd88__step-item:nth-child(even) {
      flex-direction: row-reverse;
    }

    .page-rut-tien-hd88__step-image {
      width: 40%;
      height: 100%;
      object-fit: cover;
      max-width: 100%;
    }

    .page-rut-tien-hd88__step-content {
      padding: 30px;
      width: 60%;
      box-sizing: border-box;
    }

    .page-rut-tien-hd88__step-number {
      display: inline-block;
      background-color: var(--primary-color);
      color: var(--bg-color);
      width: 40px;
      height: 40px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5em;
      font-weight: bold;
      margin-bottom: 15px;
    }

    .page-rut-tien-hd88__step-title {
      color: var(--primary-color);
      font-size: 1.8em;
      margin-bottom: 10px;
    }

    .page-rut-tien-hd88__step-description {
      color: #ccc;
      font-size: 1.1em;
    }

    /* Payment Methods Section */
    .page-rut-tien-hd88__payment-methods {
      padding: 60px 20px;
      max-width: 1200px;
      margin: 0 auto;
    }

    .page-rut-tien-hd88__methods-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
      gap: 25px;
      margin-top: 40px;
    }

    .page-rut-tien-hd88__method-item {
      background-color: var(--card-bg);
      padding: 20px;
      border-radius: 12px;
      text-align: center;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
      transition: transform 0.3s ease;
      box-sizing: border-box;
    }

    .page-rut-tien-hd88__method-item:hover {
      transform: translateY(-5px);
    }

    .page-rut-tien-hd88__method-logo {
      width: 120px;
      height: auto;
      max-width: 100%;
      margin-bottom: 15px;
      border-radius: 4px;
    }

    .page-rut-tien-hd88__method-name {
      font-size: 1.1em;
      font-weight: bold;
      color: var(--primary-color);
    }

    /* FAQ Section */
    .page-rut-tien-hd88__faq-section {
      padding: 60px 20px;
      max-width: 900px;
      margin: 0 auto;
    }

    .page-rut-tien-hd88__faq-container {
      margin-top: 40px;
    }

    .page-rut-tien-hd88__faq-item {
      margin-bottom: 15px;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      overflow: hidden;
      box-sizing: border-box;
    }

    .page-rut-tien-hd88__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
      background-color: var(--card-bg);
      padding: 18px 25px;
      border-radius: 10px;
      transition: background-color 0.3s ease;
    }

    .page-rut-tien-hd88__faq-question:hover {
      background-color: #3a3a3a;
    }

    .page-rut-tien-hd88__faq-title {
      margin: 0;
      color: var(--primary-color);
      font-size: 1.25em;
      pointer-events: none; /* Prevent title from blocking click event */
    }

    .page-rut-tien-hd88__faq-toggle {
      font-size: 1.8em;
      font-weight: bold;
      color: var(--primary-color);
      pointer-events: none; /* Prevent toggle from blocking click event */
      transition: transform 0.3s ease;
      line-height: 1;
    }

    .page-rut-tien-hd88__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 25px;
      opacity: 0;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      color: #ccc;
      background-color: var(--card-bg);
    }

    .page-rut-tien-hd88__faq-item.active .page-rut-tien-hd88__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to contain content */
      padding: 20px 25px !important;
      opacity: 1;
    }

    /* CTA Section */
    .page-rut-tien-hd88__cta-section {
      padding: 80px 20px;
      text-align: center;
      background-color: #222;
      margin-top: 60px;
    }

    .page-rut-tien-hd88__cta-section .page-rut-tien-hd88__section-title {
      margin-bottom: 20px;
    }

    .page-rut-tien-hd88__cta-section .page-rut-tien-hd88__section-title::after {
      background-color: var(--primary-color);
    }

    .page-rut-tien-hd88__cta-description {
      font-size: 1.3em;
      max-width: 800px;
      margin: 0 auto 40px auto;
      color: #ddd;
    }

    .page-rut-tien-hd88__cta-buttons {
      display: flex;
      justify-content: center;
      gap: 20px;
      flex-wrap: wrap;
    }

    /* Floating Buttons */
    .page-rut-tien-hd88__floating-buttons {
      position: fixed;
      bottom: 20px;
      right: 20px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 1000;
    }

    .page-rut-tien-hd88__floating-btn {
      display: flex;
      align-items: center;
      justify-content: center;
      width: 120px;
      height: 50px;
      background-color: var(--primary-color);
      color: var(--bg-color);
      border-radius: 50px;
      text-decoration: none;
      font-weight: bold;
      font-size: 1.1em;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
      transition: background-color 0.3s ease, transform 0.3s ease;
    }

    .page-rut-tien-hd88__floating-btn--register {
      background-color: var(--primary-color);
    }

    .page-rut-tien-hd88__floating-btn--login {
      background-color: #555;
      color: #fff;
    }

    .page-rut-tien-hd88__floating-btn:hover {
      background-color: var(--button-hover-bg);
      transform: translateY(-5px);
    }

    .page-rut-tien-hd88__floating-btn--login:hover {
      background-color: #777;
    }

    /* Responsive Adjustments */
    @media (max-width: 1024px) {
      .page-rut-tien-hd88__main-title {
        font-size: 2.8em;
      }
      .page-rut-tien-hd88__subtitle {
        font-size: 1.2em;
      }
      .page-rut-tien-hd88__step-item {
        flex-direction: column;
      }
      .page-rut-tien-hd88__step-item:nth-child(even) {
        flex-direction: column;
      }
      .page-rut-tien-hd88__step-image,
      .page-rut-tien-hd88__step-content {
        width: 100%;
      }
      .page-rut-tien-hd88__step-image {
        height: 250px;
      }
    }

    @media (max-width: 768px) {
      .page-rut-tien-hd88__hero-section {
        height: 60vh;
      }
      .page-rut-tien-hd88__main-title {
        font-size: 2.2em;
      }
      .page-rut-tien-hd88__subtitle {
        font-size: 1em;
      }
      .page-rut-tien-hd88__btn {
        padding: 12px 25px;
        font-size: 1em;
      }
      .page-rut-tien-hd88__section-title {
        font-size: 1.8em;
      }
      .page-rut-tien-hd88__section-description {
        font-size: 0.95em;
      }

      /* List item responsive */
      .page-rut-tien-hd88__features-grid,
      .page-rut-tien-hd88__methods-grid {
        grid-template-columns: 1fr;
      }

      .page-rut-tien-hd88__feature-item,
      .page-rut-tien-hd88__method-item {
        width: 100% !important;
        max-width: 100% !important;
        box-sizing: border-box !important;
        margin-left: 0 !important;
        margin-right: 0 !important;
        padding: 25px !important; /* Adjusted padding */
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
      }
      .page-rut-tien-hd88__feature-description, .page-rut-tien-hd88__step-description, .page-rut-tien-hd88__method-name, .page-rut-tien-hd88__faq-answer p, .page-rut-tien-hd88__cta-description {
        word-wrap: break-word !important;
        overflow-wrap: break-word !important;
        word-break: break-word !important;
      }

      .page-rut-tien-hd88__faq-question {
        padding: 15px 20px;
      }
      .page-rut-tien-hd88__faq-title {
        font-size: 1.1em;
      }
      .page-rut-tien-hd88__faq-toggle {
        font-size: 1.5em;
      }
      .page-rut-tien-hd88__faq-answer {
        padding: 0 20px;
      }
      .page-rut-tien-hd88__faq-item.active .page-rut-tien-hd88__faq-answer {
        padding: 15px 20px !important;
      }

      .page-rut-tien-hd88__floating-buttons {
        flex-direction: row;
        width: calc(100% - 40px);
        left: 20px;
        right: 20px;
        bottom: 15px;
        justify-content: space-around;
      }
      .page-rut-tien-hd88__floating-btn {
        flex: 1;
        width: auto;
        max-width: 48%;
        font-size: 1em;
      }
    }

    @media (max-width: 480px) {
      .page-rut-tien-hd88__main-title {
        font-size: 1.8em;
      }
      .page-rut-tien-hd88__subtitle {
        font-size: 0.9em;
      }
      .page-rut-tien-hd88__hero-buttons {
        flex-direction: column;
        gap: 15px;
      }
      .page-rut-tien-hd88__btn {
        width: 100%;
        max-width: 250px;
      }
      .page-rut-tien-hd88__section-title {
        font-size: 1.5em;
      }
      .page-rut-tien-hd88__step-title {
        font-size: 1.4em;
      }
      .page-rut-tien-hd88__step-description {
        font-size: 0.95em;
      }
    }