:root {
      --page-winvn__primary-color: #f0b90b; /* Vàng */
      --page-winvn__secondary-color: #e65100; /* Cam đậm */
      --page-winvn__dark-bg: #1a1a2e; /* Nền tối */
      --page-winvn__light-text: #ffffff;
      --page-winvn__gray-text: #cccccc;
      --page-winvn__accent-color: #00bcd4; /* Xanh ngọc */
      --page-winvn__border-color: #33334d;
    }

    .page-winvn {
      font-family: 'Arial', sans-serif;
      background-color: var(--page-winvn__dark-bg);
      color: var(--page-winvn__light-text);
      line-height: 1.6;
      padding-bottom: 80px; /* Space for footer */
    }

    .page-winvn__section {
      padding: 40px 20px;
      max-width: 1200px;
      margin: 0 auto;
      text-align: center;
    }

    .page-winvn__section-title {
      font-size: 2.5em;
      color: var(--page-winvn__primary-color);
      margin-bottom: 30px;
      font-weight: bold;
      text-transform: uppercase;
    }

    .page-winvn__section-subtitle {
      font-size: 1.2em;
      color: var(--page-winvn__gray-text);
      margin-bottom: 40px;
    }

    /* Hero Section */
    .page-winvn__hero-section {
      padding-top: 120px; /* To clear fixed header on desktop */
      background-color: #111122;
      position: relative;
      overflow: hidden;
    }

    .page-winvn__hero-banner {
      width: 100%;
      max-width: 100%;
      height: auto;
      display: block;
      margin: 0 auto;
      border-radius: 10px;
      box-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
    }

    .page-winvn__hero-content {
      padding: 30px 20px;
      text-align: center;
    }

    .page-winvn__hero-title {
      font-size: 3em;
      color: var(--page-winvn__primary-color);
      margin-bottom: 15px;
      line-height: 1.2;
      text-shadow: 2px 2px 4px rgba(0,0,0,0.7);
    }

    .page-winvn__hero-description {
      font-size: 1.3em;
      color: var(--page-winvn__light-text);
      margin-bottom: 30px;
      max-width: 800px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-winvn__hero-button {
      display: inline-block;
      background-color: var(--page-winvn__secondary-color);
      color: var(--page-winvn__light-text);
      padding: 15px 30px;
      border-radius: 50px;
      text-decoration: none;
      font-size: 1.2em;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.2s ease;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
      border: none;
      cursor: pointer;
    }

    .page-winvn__hero-button:hover {
      background-color: #ff7043;
      transform: translateY(-3px);
    }

    /* Floating Login Button */
    .page-winvn__floating-button {
      position: fixed;
      bottom: 20px;
      right: 20px;
      background-color: var(--page-winvn__primary-color);
      color: var(--page-winvn__dark-bg);
      padding: 15px 25px;
      border-radius: 50px;
      text-decoration: none;
      font-size: 1.1em;
      font-weight: bold;
      box-shadow: 0 5px 15px rgba(0, 0, 0, 0.4);
      z-index: 1000;
      animation: page-winvn__pulse 1.5s infinite;
      transition: background-color 0.3s ease, transform 0.2s ease;
      display: none; /* Hidden by default, shown on mobile */
    }

    .page-winvn__floating-button:hover {
      background-color: #ffdf60;
      transform: scale(1.05);
    }

    @keyframes page-winvn__pulse {
      0% { transform: scale(1); }
      50% { transform: scale(1.05); }
      100% { transform: scale(1); }
    }

    /* Game Categories */
    .page-winvn__game-categories {
      background-color: #111122;
    }

    .page-winvn__category-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 25px;
      margin-top: 40px;
    }

    .page-winvn__category-item {
      background-color: var(--page-winvn__dark-bg);
      border-radius: 12px;
      overflow: hidden;
      box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      text-align: center;
      border: 1px solid var(--page-winvn__border-color);
    }

    .page-winvn__category-item:hover {
      transform: translateY(-8px);
      box-shadow: 0 12px 24px rgba(0, 0, 0, 0.5);
    }

    .page-winvn__category-link {
      display: block;
      text-decoration: none;
      color: var(--page-winvn__light-text);
      padding: 20px;
    }

    .page-winvn__category-image-wrapper {
      width: 100%;
      height: 200px; /* Fixed height for consistency */
      overflow: hidden;
      display: flex;
      justify-content: center;
      align-items: center;
      background-color: #000;
    }

    .page-winvn__category-image {
      width: 100%;
      height: auto;
      object-fit: cover;
      transition: transform 0.3s ease;
    }

    .page-winvn__category-item:hover .page-winvn__category-image {
      transform: scale(1.05);
    }

    .page-winvn__category-title {
      font-size: 1.5em;
      margin-top: 15px;
      color: var(--page-winvn__primary-color);
      font-weight: bold;
    }

    .page-winvn__category-description {
      font-size: 0.9em;
      color: var(--page-winvn__gray-text);
      padding: 0 15px 15px;
    }

    /* Game Providers */
    .page-winvn__providers-section {
      background-color: var(--page-winvn__dark-bg);
    }

    .page-winvn__provider-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 20px;
      margin-top: 40px;
    }

    .page-winvn__provider-item {
      background-color: #22223a;
      border-radius: 10px;
      padding: 15px;
      display: flex;
      justify-content: center;
      align-items: center;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
      border: 1px solid var(--page-winvn__border-color);
      height: 100px; /* Ensure consistent height for logos */
      overflow: hidden;
    }

    .page-winvn__provider-item:hover {
      transform: translateY(-5px);
      box-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
    }

    .page-winvn__provider-logo {
      width: 100%;
      max-width: 120px; /* Max width for logos */
      height: auto;
      object-fit: contain;
    }

    /* Promotions */
    .page-winvn__promotions-section {
      background-color: #111122;
    }

    .page-winvn__promotion-card {
      background-color: var(--page-winvn__dark-bg);
      border-radius: 12px;
      padding: 30px;
      margin-bottom: 25px;
      box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
      text-align: left;
      border: 1px solid var(--page-winvn__border-color);
    }

    .page-winvn__promotion-card-title {
      font-size: 2em;
      color: var(--page-winvn__primary-color);
      margin-bottom: 15px;
      font-weight: bold;
    }

    .page-winvn__promotion-card-description {
      color: var(--page-winvn__gray-text);
      margin-bottom: 20px;
    }

    .page-winvn__promotion-card-button {
      display: inline-block;
      background-color: var(--page-winvn__accent-color);
      color: var(--page-winvn__dark-bg);
      padding: 12px 25px;
      border-radius: 30px;
      text-decoration: none;
      font-weight: bold;
      transition: background-color 0.3s ease;
    }

    .page-winvn__promotion-card-button:hover {
      background-color: #4dd0e1;
    }

    /* Why Choose Us */
    .page-winvn__advantages-section {
      background-color: var(--page-winvn__dark-bg);
    }

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

    .page-winvn__advantage-item {
      background-color: #22223a;
      border-radius: 12px;
      padding: 25px;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
      border: 1px solid var(--page-winvn__border-color);
      text-align: left;
    }

    .page-winvn__advantage-icon {
      width: 60px;
      height: 60px;
      margin-bottom: 15px;
      color: var(--page-winvn__primary-color);
      font-size: 3em;
      display: block; /* Ensure it's not an inline element that gets tiny */
      margin-left: auto;
      margin-right: auto;
    }

    .page-winvn__advantage-title {
      font-size: 1.6em;
      color: var(--page-winvn__primary-color);
      margin-bottom: 10px;
      font-weight: bold;
    }

    .page-winvn__advantage-description {
      color: var(--page-winvn__gray-text);
      font-size: 0.95em;
    }

    /* FAQ Section */
    .page-winvn__faq-section {
      background-color: #111122;
    }

    .page-winvn__faq-list {
      margin-top: 30px;
      text-align: left;
    }

    .page-winvn__faq-item {
      background-color: var(--page-winvn__dark-bg);
      border: 1px solid var(--page-winvn__border-color);
      border-radius: 8px;
      margin-bottom: 15px;
      overflow: hidden;
      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    }

    .page-winvn__faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px;
      cursor: pointer;
      user-select: none;
      background-color: #22223a;
      transition: background-color 0.3s ease;
    }

    .page-winvn__faq-question:hover {
      background-color: #2a2a47;
    }

    .page-winvn__faq-question h3 {
      margin: 0;
      font-size: 1.3em;
      color: var(--page-winvn__primary-color);
      pointer-events: none; /* Prevent h3 from blocking click event */
    }

    .page-winvn__faq-toggle {
      font-size: 1.8em;
      font-weight: bold;
      color: var(--page-winvn__accent-color);
      transition: transform 0.3s ease;
      pointer-events: none; /* Prevent toggle icon from blocking click event */
    }

    .page-winvn__faq-item.active .page-winvn__faq-toggle {
      transform: rotate(45deg);
    }

    .page-winvn__faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 20px;
      opacity: 0;
      transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1), padding 0.4s ease, opacity 0.4s ease;
      color: var(--page-winvn__gray-text);
      font-size: 1em;
    }

    .page-winvn__faq-item.active .page-winvn__faq-answer {
      max-height: 2000px !important; /* Sufficiently large to show content */
      padding: 20px 20px !important;
      opacity: 1;
    }

    /* Call to Action */
    .page-winvn__cta-section {
      background-color: var(--page-winvn__dark-bg);
      padding: 50px 20px;
      border-top: 1px solid var(--page-winvn__border-color);
    }

    .page-winvn__cta-title {
      font-size: 2.8em;
      color: var(--page-winvn__primary-color);
      margin-bottom: 20px;
      text-shadow: 1px 1px 3px rgba(0,0,0,0.5);
    }

    .page-winvn__cta-description {
      font-size: 1.2em;
      color: var(--page-winvn__light-text);
      margin-bottom: 30px;
      max-width: 700px;
      margin-left: auto;
      margin-right: auto;
    }

    .page-winvn__cta-button {
      background-color: var(--page-winvn__secondary-color);
      color: var(--page-winvn__light-text);
      padding: 18px 40px;
      border-radius: 50px;
      text-decoration: none;
      font-size: 1.4em;
      font-weight: bold;
      transition: background-color 0.3s ease, transform 0.2s ease;
      box-shadow: 0 6px 12px rgba(0, 0, 0, 0.3);
      border: none;
      cursor: pointer;
    }

    .page-winvn__cta-button:hover {
      background-color: #ff7043;
      transform: translateY(-3px);
    }

    /* General image responsiveness */
    .page-winvn img {
      max-width: 100%;
      height: auto;
      display: block; /* Prevents extra space below images */
    }

    .page-winvn__image-container {
      width: 100%;
      max-width: 100%;
      overflow: hidden;
      box-sizing: border-box;
    }

    /* Responsive adjustments */
    @media (max-width: 768px) {
      .page-winvn__hero-section {
        padding-top: 100px; /* To clear fixed header on mobile */
      }

      .page-winvn__hero-title {
        font-size: 2.2em;
      }

      .page-winvn__hero-description {
        font-size: 1em;
      }

      .page-winvn__hero-button {
        padding: 12px 25px;
        font-size: 1em;
      }

      .page-winvn__section-title {
        font-size: 2em;
      }

      .page-winvn__category-grid {
        grid-template-columns: 1fr;
      }

      .page-winvn__provider-grid {
        grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
      }

      .page-winvn__promotion-card-title {
        font-size: 1.5em;
      }

      .page-winvn__advantage-grid {
        grid-template-columns: 1fr;
      }

      .page-winvn__advantage-title {
        font-size: 1.4em;
      }

      .page-winvn__faq-question h3 {
        font-size: 1.1em;
      }

      .page-winvn__faq-answer {
        padding: 0 15px;
      }

      .page-winvn__faq-item.active .page-winvn__faq-answer {
        padding: 15px 15px !important;
      }

      .page-winvn__cta-title {
        font-size: 2em;
      }

      .page-winvn__cta-button {
        padding: 15px 30px;
        font-size: 1.2em;
      }

      .page-winvn__floating-button {
        display: block; /* Show floating button on mobile */
        font-size: 0.9em;
        padding: 12px 20px;
        bottom: 70px; /* Adjust position to not overlap with potential mobile footer elements */
        right: 15px;
      }

      /* Force responsive image styles with !important */
      .page-winvn img {
        max-width: 100% !important;
        height: auto !important;
      }
      .page-winvn__image-container {
        width: 100% !important;
        max-width: 100% !important;
        overflow: hidden !important;
        box-sizing: border-box !important;
      }
    }