.page-index-gioi-thieu-nen-tang {
  background-color: var(--background-color, #0A0A0A);
  color: var(--text-main-color, #FFF6D6);
  font-family: Arial, sans-serif;
  line-height: 1.6;
}

.page-index-gioi-thieu-nen-tang__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  box-sizing: border-box;
}

.page-index-gioi-thieu-nen-tang__top-section {
  padding-top: 10px; /* Assuming shared.css handles body padding-top */
  padding-bottom: 40px;
  text-align: center;
  background-color: var(--background-color, #0A0A0A);
}

.page-index-gioi-thieu-nen-tang__main-title {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  color: var(--text-main-color, #FFF6D6);
  margin-bottom: 15px;
  font-weight: bold;
  line-height: 1.2;
}

.page-index-gioi-thieu-nen-tang__description {
  font-size: 1.1rem;
  color: var(--text-main-color, #FFF6D6);
  max-width: 800px;
  margin: 0 auto 30px auto;
}

.page-index-gioi-thieu-nen-tang__cta-buttons {
  display: flex;
  justify-content: center;
  gap: 15px;
  flex-wrap: wrap;
}

.page-index-gioi-thieu-nen-tang__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 25px;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: bold;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-index-gioi-thieu-nen-tang__btn--primary {
  background: linear-gradient(180deg, #FFD86A 0%, #DDA11D 100%);
  color: var(--text-main-color, #FFF6D6);
  border: none;
  box-shadow: 0 4px 15px rgba(242, 193, 78, 0.4);
}

.page-index-gioi-thieu-nen-tang__btn--primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.page-index-gioi-thieu-nen-tang__btn--secondary {
  background: transparent;
  color: var(--text-main-color, #FFF6D6);
  border: 2px solid var(--border-color, #3A2A12);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-index-gioi-thieu-nen-tang__btn--secondary:hover {
  background-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-2px);
}

.page-index-gioi-thieu-nen-tang__article-section {
  padding: 60px 0;
  background-color: var(--background-color, #0A0A0A);
}

.page-index-gioi-thieu-nen-tang__article-wrap {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 20px;
}

.page-index-gioi-thieu-nen-tang__article-content h2 {
  font-size: 2.2rem;
  color: var(--text-main-color, #FFF6D6);
  margin-top: 40px;
  margin-bottom: 25px;
  font-weight: bold;
  border-left: 5px solid var(--primary-color, #F2C14E);
  padding-left: 15px;
}

.page-index-gioi-thieu-nen-tang__article-content h3 {
  font-size: 1.8rem;
  color: var(--text-main-color, #FFF6D6);
  margin-top: 35px;
  margin-bottom: 20px;
  font-weight: bold;
}

.page-index-gioi-thieu-nen-tang__article-content p {
  font-size: 1.05rem;
  color: var(--text-main-color, #FFF6D6);
  margin-bottom: 20px;
}

.page-index-gioi-thieu-nen-tang__article-content p strong {
  color: var(--primary-color, #F2C14E);
}

.page-index-gioi-thieu-nen-tang__figure {
  margin: 40px 0;
  text-align: center;
}

.page-index-gioi-thieu-nen-tang__figure img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
  border-radius: 8px;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
  min-width: 200px; /* Enforce minimum size */
  min-height: 200px; /* Enforce minimum size */
}

.page-index-gioi-thieu-nen-tang__figcaption {
  font-size: 0.95rem;
  color: rgba(255, 246, 214, 0.7);
  margin-top: 15px;
}

.page-index-gioi-thieu-nen-tang__promo-section {
  background-color: var(--card-bg-color, #111111);
  padding: 60px 20px;
  text-align: center;
  border-radius: 10px;
  margin: 40px auto;
  max-width: 900px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
}

.page-index-gioi-thieu-nen-tang__promo-heading {
  font-size: 2.5rem;
  color: var(--glow-color, #FFD36B);
  margin-bottom: 20px;
  font-weight: bold;
}

.page-index-gioi-thieu-nen-tang__promo-text {
  font-size: 1.15rem;
  color: var(--text-main-color, #FFF6D6);
  margin-bottom: 30px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* --- Responsive Styles --- */

@media (max-width: 1024px) {
  .page-index-gioi-thieu-nen-tang__main-title {
    font-size: clamp(2rem, 4.5vw, 3rem);
  }

  .page-index-gioi-thieu-nen-tang__description {
    font-size: 1rem;
  }

  .page-index-gioi-thieu-nen-tang__article-content h2 {
    font-size: 2rem;
  }

  .page-index-gioi-thieu-nen-tang__article-content h3 {
    font-size: 1.6rem;
  }

  .page-index-gioi-thieu-nen-tang__promo-heading {
    font-size: 2rem;
  }
}

@media (max-width: 768px) {
  /* 1. 顶区标题 + 双 CTA */
  .page-index-gioi-thieu-nen-tang__top-section {
    padding-top: 10px !important; /* Enforce 10px top padding */
    padding-bottom: 30px;
  }

  .page-index-gioi-thieu-nen-tang__main-title {
    font-size: clamp(1.8rem, 7vw, 2.5rem);
    padding: 0 15px;
  }

  .page-index-gioi-thieu-nen-tang__description {
    font-size: 0.95rem;
    padding: 0 15px;
  }

  .page-index-gioi-thieu-nen-tang__cta-buttons {
    flex-direction: column;
    gap: 10px;
    padding: 0 15px;
  }

  .page-index-gioi-thieu-nen-tang__btn {
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px !important;
    padding-right: 15px !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  /* 2. 单栏长文容器 */
  .page-index-gioi-thieu-nen-tang__article-section {
    padding: 40px 0;
  }

  .page-index-gioi-thieu-nen-tang__article-wrap {
    padding: 0 15px;
  }

  .page-index-gioi-thieu-nen-tang__article-content h2 {
    font-size: 1.8rem;
    padding-left: 10px;
  }

  .page-index-gioi-thieu-nen-tang__article-content h3 {
    font-size: 1.4rem;
  }

  .page-index-gioi-thieu-nen-tang__article-content p {
    font-size: 1rem;
  }

  .page-index-gioi-thieu-nen-tang__promo-section {
    padding: 40px 15px;
    margin: 30px 15px;
    max-width: calc(100% - 30px);
  }

  .page-index-gioi-thieu-nen-tang__promo-heading {
    font-size: 1.8rem;
  }

  .page-index-gioi-thieu-nen-tang__promo-text {
    font-size: 1rem;
  }

  /* 3. 通用图片与 figure */
  .page-index-gioi-thieu-nen-tang img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    box-sizing: border-box !important;
  }

  .page-index-gioi-thieu-nen-tang__figure {
    margin: 30px 0;
  }

  .page-index-gioi-thieu-nen-tang__figcaption {
    font-size: 0.9rem;
  }

  /* 4. 按钮与按钮容器 - Handled by .page-index-gioi-thieu-nen-tang__btn and __cta-buttons above */
  .page-index-gioi-thieu-nen-tang__promo-section .page-index-gioi-thieu-nen-tang__btn {
    width: auto !important; /* Allow button to size to content if not full width */
    padding: 10px 20px !important;
  }

  /* 5. 注册教程与 FAQ 区块 - Not explicitly in this page's outline, but general content blocks need this */
  .page-index-gioi-thieu-nen-tang__article-content {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-index-gioi-thieu-nen-tang__container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }
}