.page-index {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: #FFF5E1; /* Text Main */
  background-color: #B71C1C; /* Background */
}

.page-index__section {
  padding: 40px 0;
  text-align: center;
  position: relative;
}

.page-index__section-content {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
  box-sizing: border-box;
}

.page-index__section-title {
  font-size: 2.5em;
  font-weight: bold;
  margin-bottom: 30px;
  color: #FFF5E1; /* Text Main */
  text-transform: uppercase;
}

/* Tieudevip style */
.page-index__section-title.tieudevip {
  display: inline-block;
  padding: 10px 30px;
  margin-bottom: 40px;
  border: 2px solid #F2B544; /* Border */
  border-radius: 5px;
  color: #F4D34D; /* Gold */
  box-shadow: 0 0 15px rgba(244, 211, 77, 0.6);
  background: linear-gradient(180deg, #7A0E0E 0%, #C91F17 100%); /* Deep Red to Main Color */
  text-shadow: 0 0 8px rgba(255, 255, 255, 0.5);
  font-size: 2.2em;
  line-height: 1.2;
}

.page-index__btn-primary,
.page-index__btn-secondary {
  display: inline-block;
  padding: 12px 25px;
  margin: 10px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  transition: all 0.3s ease;
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-index__btn-primary {
  background: linear-gradient(180deg, #FFD86A 0%, #E6B800 100%); /* Button */
  color: #7A0E0E; /* Deep Red for contrast */
  border: none;
}

.page-index__btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(255, 216, 106, 0.4);
}

.page-index__btn-secondary {
  background: #7A0E0E; /* Deep Red */
  color: #FFF5E1; /* Text Main */
  border: 2px solid #F4D34D; /* Gold */
}

.page-index__btn-secondary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(244, 211, 77, 0.4);
}

/* Module 0: Hero Carousel */
.page-index__hero-carousel-section {
  padding-top: 10px; /* Small top spacing as per rule */
  padding-bottom: 0;
  background-color: transparent;
}

.page-index__hero-slider {
  position: relative;
  max-width: 1020px;
  margin: 0 auto;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.page-index__hero-slide {
  display: none;
  width: 100%;
}

.page-index__hero-slide.is-active {
  display: block;
}

.page-index__hero-slide img {
  width: 100%;
  height: auto;
  display: block;
}

.page-index__hero-slider-prev,
.page-index__hero-slider-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.5);
  color: white;
  border: none;
  padding: 10px 15px;
  cursor: pointer;
  font-size: 1.5em;
  border-radius: 5px;
  z-index: 10;
}

.page-index__hero-slider-prev {
  left: 10px;
}

.page-index__hero-slider-next {
  right: 10px;
}

.page-index__hero-slider-dots {
  position: absolute;
  bottom: 10px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
}

.page-index__hero-slider-dots button {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  border: none;
  cursor: pointer;
  padding: 0;
}

.page-index__hero-slider-dots button.is-active {
  background: #FFD86A; /* Button color for active dot */
}

/* Module 1: Guide Section */
.page-index__guide-section {
  padding-top: 60px;
  padding-bottom: 60px;
}

.page-index__guide-box {
  max-width: 100%;
  margin: 0 auto;
  padding: 16px 20px 24px;
  background: #D32F2F; /* Card BG */
  border-radius: 4px;
  box-sizing: border-box;
  border: 2px solid #F2B544; /* Border */
  box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
}

.page-index__guide-grid {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: center;
  gap: 8px;
  margin-top: 30px;
}

.page-index__guide-card {
  display: block;
  flex: 0 0 calc(20% - 8px);
  max-width: calc(20% - 8px);
  text-decoration: none;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border-radius: 8px;
  overflow: hidden;
}

.page-index__guide-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.4);
}

.page-index__guide-card img {
  width: 100%;
  height: auto;
  aspect-ratio: 250 / 350;
  object-fit: contain;
  display: block;
  border-radius: 8px;
}

/* PC 错落：中间高、两边平行 */
.page-index__guide-card--pos-1,
.page-index__guide-card--pos-5 { padding-top: 50px; }
.page-index__guide-card--pos-2,
.page-index__guide-card--pos-4 { padding-top: 25px; }
.page-index__guide-card--pos-3 { padding-top: 0; }

/* Module 2: Home Content Section */
.page-index__home-content-section {
  padding-top: 60px;
  padding-bottom: 60px;
}

.page-index__home-content-row {
  display: flex;
  justify-content: center;
}

.page-index__home-content-box {
  max-width: 91%;
  width: 100%;
  margin: 0 auto;
  padding: 10px 16px;
  border: 5px solid #F2B544; /* Border */
  border-radius: 15px;
  box-shadow: 0 0 20px #FFCC66; /* Glow */
  height: 700px; /* Fixed height for desktop */
  text-align: left;
  box-sizing: border-box;
  background-color: #D32F2F; /* Card BG */
  color: #FFF5E1; /* Text Main */
}

.page-index__home-content-inner {
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  padding-right: 8px; /* For scrollbar */
}

.page-index__home-content-inner::-webkit-scrollbar {
  width: 8px;
}

.page-index__home-content-inner::-webkit-scrollbar-track {
  background: #7A0E0E; /* Deep Red */
  border-radius: 10px;
}

.page-index__home-content-inner::-webkit-scrollbar-thumb {
  background: #F4D34D; /* Gold */
  border-radius: 10px;
}

.page-index__home-content-title {
  font-size: 2.2em;
  color: #FFD86A; /* Button color for title */
  margin-bottom: 20px;
  text-align: center;
}

.page-index__home-content-box h2 {
  font-size: 1.8em;
  color: #FFD86A; /* Button color */
  margin-top: 30px;
  margin-bottom: 15px;
}

.page-index__home-content-box h3 {
  font-size: 1.4em;
  color: #F4D34D; /* Gold */
  margin-top: 25px;
  margin-bottom: 10px;
}

.page-index__home-content-box p,
.page-index__home-content-box ul,
.page-index__home-content-box ol {
  margin-bottom: 15px;
  font-size: 1.1em;
  line-height: 1.7;
}

.page-index__home-content-box ul,
.page-index__home-content-box ol {
  padding-left: 25px;
}

.page-index__home-content-box li {
  margin-bottom: 8px;
}

.page-index__home-content-box figure {
  margin: 20px auto;
  text-align: center;
}

.page-index__home-content-box img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.page-index__home-content-box figcaption {
  font-size: 0.9em;
  color: #F4D34D; /* Gold */
  margin-top: 10px;
}

.page-index__cta-buttons {
  margin-top: 30px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 15px;
}

/* Module 3: Blog Section */
.page-index__blog-section {
  padding-top: 60px;
  padding-bottom: 60px;
  background-color: #7A0E0E; /* Deep Red */
}

.page-index__blog-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr); /* Changed to 3 for better layout on desktop */
  gap: 30px;
  margin-top: 40px;
}

.page-index__blog-card {
  background-color: #D32F2F; /* Card BG */
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  text-align: left;
}

.page-index__blog-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.page-index__blog-card-link {
  text-decoration: none;
  color: inherit;
  display: block;
}

.page-index__blog-media {
  position: relative;
  height: 200px; /* Fixed height for consistent card images */
  overflow: hidden;
}

.page-index__blog-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-top-left-radius: 10px;
  border-top-right-radius: 10px;
}

.page-index__blog-date {
  position: absolute;
  top: 15px;
  right: 15px;
  background: #FFD86A; /* Button */
  color: #7A0E0E; /* Deep Red */
  padding: 8px 12px;
  border-radius: 5px;
  font-weight: bold;
  text-align: center;
  line-height: 1.2;
  box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.page-index__blog-date span:first-child {
  display: block;
  font-size: 1.2em;
}

.page-index__blog-date span:last-child {
  display: block;
  font-size: 0.8em;
  text-transform: uppercase;
}

.page-index__blog-title {
  font-size: 1.3em;
  color: #FFD86A; /* Button */
  padding: 15px;
  margin: 0;
  min-height: 60px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.page-index__blog-excerpt {
  font-size: 0.95em;
  color: #FFF5E1; /* Text Main */
  padding: 0 15px 20px;
  margin: 0;
  min-height: 40px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.page-index__view-all-posts {
  margin-top: 50px;
  text-align: center;
}

/* Module 4: App Download Section */
.page-index__app-download-section {
  padding-top: 60px;
  padding-bottom: 80px;
  background-color: #C91F17; /* Main Color */
}

.page-index__app-description {
  font-size: 1.3em;
  margin-bottom: 40px;
  color: #FFF5E1; /* Text Main */
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.page-index__app-cta {
  margin-bottom: 40px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 20px;
}

.page-index__app-image {
  max-width: 600px;
  width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
  border-radius: 15px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
}

/* Responsive styles */
@media (max-width: 1024px) {
  .page-index__section-title.tieudevip {
    font-size: 1.8em;
    padding: 8px 25px;
  }
  .page-index__home-content-box {
    max-width: 95%;
  }
  .page-index__blog-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .page-index__guide-card {
    flex: 0 0 calc(33.333% - 8px);
    max-width: calc(33.333% - 8px);
  }
}

@media (max-width: 768px) {
  .page-index {
    font-size: 16px;
    line-height: 1.6;
  }
  .page-index__section {
    padding: 30px 0;
  }
  .page-index__section-title {
    font-size: 2em;
    margin-bottom: 20px;
  }
  .page-index__section-title.tieudevip {
    font-size: 1.5em;
    padding: 6px 20px;
    margin-bottom: 30px;
  }

  /* Hero Carousel */
  .page-index__hero-carousel-section {
    padding-top: 10px !important;
  }
  .page-index__hero-slider-prev,
  .page-index__hero-slider-next {
    padding: 8px 12px;
    font-size: 1.2em;
  }

  /* Guide Section */
  .page-index__guide-section {
    padding-top: 40px;
    padding-bottom: 40px;
  }
  .page-index__guide-box {
    padding: 15px;
  }
  .page-index__guide-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 10px;
    margin-top: 20px;
  }
  .page-index__guide-card {
    flex: none;
    max-width: none;
    padding-top: 0 !important; /* Reset PC staggered padding */
  }
  /* Mobile: Top 2, Bottom 3 */
  .page-index__guide-card--pos-1,
  .page-index__guide-card--pos-2 { grid-column: span 3; }
  .page-index__guide-card--pos-3,
  .page-index__guide-card--pos-4,
  .page-index__guide-card--pos-5 { grid-column: span 2; }

  /* Home Content Section */
  .page-index__home-content-section {
    padding-top: 40px;
    padding-bottom: 40px;
  }
  .page-index__home-content-box {
    max-width: 100%;
    height: auto; /* Auto height for mobile */
    padding: 20px 15px;
    border-width: 3px;
  }
  .page-index__home-content-inner {
    height: auto; /* Auto height for mobile */
    overflow: visible; /* No scrollbar for mobile */
    padding-right: 0;
  }
  .page-index__home-content-title {
    font-size: 1.8em;
  }
  .page-index__home-content-box h2 {
    font-size: 1.5em;
  }
  .page-index__home-content-box h3 {
    font-size: 1.2em;
  }
  .page-index__home-content-box p,
  .page-index__home-content-box ul,
  .page-index__home-content-box ol {
    font-size: 1em;
  }

  /* Blog Section */
  .page-index__blog-section {
    padding-top: 40px;
    padding-bottom: 40px;
  }
  .page-index__blog-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .page-index__blog-media {
    height: 180px;
  }
  .page-index__blog-title {
    font-size: 1.2em;
  }
  .page-index__blog-excerpt {
    font-size: 0.9em;
  }

  /* App Download Section */
  .page-index__app-download-section {
    padding-top: 40px;
    padding-bottom: 50px;
  }
  .page-index__app-description {
    font-size: 1.1em;
    margin-bottom: 30px;
  }
  .page-index__app-cta {
    flex-direction: column;
    gap: 15px;
  }
  .page-index__btn-primary,
  .page-index__btn-secondary {
    width: 100% !important;
    max-width: 100% !important;
    padding-left: 15px;
    padding-right: 15px;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
  }

  /* General image and container responsive rules */
  .page-index img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
  }
  .page-index__section-content,
  .page-index__guide-box,
  .page-index__home-content-box,
  .page-index__blog-card,
  .page-index__app-download-section {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 15px;
    padding-right: 15px;
  }
  .page-index__section-content {
    padding-left: 0;
    padding-right: 0;
  }
}