.page-x-s {
  font-family: 'Arial', sans-serif;
  color: #E5E5E5; /* Light grey for text on dark background */
  background-color: #1A1A1A; /* Dark background */
  line-height: 1.6;
}

.page-x-s__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.page-x-s__section-title {
  font-size: 2.5em;
  color: #FFD700; /* Gold for titles */
  text-align: center;
  margin-bottom: 40px;
  padding-top: 60px;
  font-weight: bold;
}

.page-x-s__hero {
  background: linear-gradient(135deg, #1A1A1A 0%, #333333 50%, #1A1A1A 100%);
  padding: 100px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-x-s__hero-title {
  font-size: 3.8em;
  color: #FFD700;
  margin-bottom: 20px;
  font-weight: 900;
  line-height: 1.2;
}

.page-x-s__hero-description {
  font-size: 1.3em;
  color: #E5E5E5;
  max-width: 800px;
  margin: 0 auto 40px auto;
}

.page-x-s__hero-actions {
  display: flex;
  justify-content: center;
  gap: 20px;
}

.page-x-s__btn {
  display: inline-block;
  padding: 15px 30px;
  border-radius: 8px;
  font-size: 1.1em;
  font-weight: bold;
  text-decoration: none;
  transition: all 0.3s ease;
  text-align: center;
  cursor: pointer;
  border: none;
}

.page-x-s__btn--primary {
  background-color: #FFD700; /* Gold */
  color: #1A1A1A;
}

.page-x-s__btn--primary:hover {
  background-color: #e6c200;
  transform: translateY(-2px);
}

.page-x-s__btn--secondary {
  background-color: transparent;
  color: #FFD700;
  border: 2px solid #FFD700;
}

.page-x-s__btn--secondary:hover {
  background-color: #FFD700;
  color: #1A1A1A;
  transform: translateY(-2px);
}

.page-x-s__btn--large {
  padding: 18px 40px;
  font-size: 1.3em;
}

.page-x-s__btn--small {
    padding: 10px 20px;
    font-size: 0.9em;
}

.page-x-s__hero-image {
  position: absolute;
  bottom: 0;
  right: 0;
  opacity: 0.2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: -1;
}

.page-x-s__intro, .page-x-s__features, .page-x-s__types, .page-x-s__guide, .page-x-s__tips, .page-x-s__mobile-app, .page-x-s__faq, .page-x-s__cta {
  padding: 80px 0;
}

.page-x-s__intro p, .page-x-s__guide p, .page-x-s__tips p, .page-x-s__mobile-app p, .page-x-s__faq p {
  font-size: 1.1em;
  text-align: center;
  max-width: 900px;
  margin: 0 auto 20px auto;
  color: #B0B0B0;
}

.page-x-s__image-full {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: 12px;
    margin-top: 40px;
}

.page-x-s__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.page-x-s__grid--2-cols {
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
}

.page-x-s__feature-item {
  background-color: #2A2A2A;
  padding: 30px;
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  transition: transform 0.3s ease;
}

.page-x-s__feature-item:hover {
  transform: translateY(-5px);
}

.page-x-s__feature-icon {
  width: 70px;
  height: 70px;
  margin-bottom: 20px;
  object-fit: contain;
}

.page-x-s__feature-title {
  font-size: 1.6em;
  color: #FFD700;
  margin-bottom: 15px;
}

.page-x-s__feature-item p {
  font-size: 1em;
  color: #B0B0B0;
  text-align: center;
}

.page-x-s__type-card {
  background-color: #2A2A2A;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  text-align: center;
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.page-x-s__type-card:hover {
  transform: translateY(-5px);
}

.page-x-s__type-image {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.page-x-s__type-card .page-x-s__type-title {
  font-size: 1.8em;
  color: #FFD700;
  margin: 20px 0 10px 0;
  padding: 0 20px;
}

.page-x-s__type-card p {
  font-size: 1em;
  color: #B0B0B0;
  padding: 0 20px 20px 20px;
  flex-grow: 1;
}

.page-x-s__type-card .page-x-s__btn {
    margin-bottom: 20px;
}

.page-x-s__steps {
  list-style: none;
  padding: 0;
  margin: 40px auto;
  max-width: 900px;
}

.page-x-s__steps li {
  background-color: #2A2A2A;
  margin-bottom: 20px;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  position: relative;
  text-align: left;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.page-x-s__steps li::before {
  content: 'Bước ' counter(step);
  counter-increment: step;
  background-color: #FFD700;
  color: #1A1A1A;
  font-weight: bold;
  padding: 8px 15px;
  border-radius: 5px;
  position: absolute;
  top: 20px;
  left: 20px;
  font-size: 0.9em;
}

.page-x-s__step-title {
  font-size: 1.5em;
  color: #FFD700;
  margin-top: 40px;
  margin-bottom: 15px;
  padding-left: 20px;
}

.page-x-s__steps li p {
  text-align: left;
  margin: 0 0 15px 0;
  padding-left: 20px;
  color: #B0B0B0;
}

.page-x-s__steps li .page-x-s__btn {
    margin-left: 20px;
}

.page-x-s__list {
  list-style: none;
  padding: 0;
  margin: 40px auto;
  max-width: 900px;
}

.page-x-s__list li {
  background-color: #2A2A2A;
  margin-bottom: 20px;
  padding: 30px;
  border-radius: 12px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  text-align: left;
}

.page-x-s__list li h3 {
  font-size: 1.5em;
  color: #FFD700;
  margin-bottom: 10px;
}

.page-x-s__list li p {
  text-align: left;
  margin: 0;
  color: #B0B0B0;
}

.page-x-s__mobile-app .page-x-s__container {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.page-x-s__app-download {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 40px;
  margin-top: 40px;
  background-color: #2A2A2A;
  padding: 40px;
  border-radius: 12px;
  max-width: 900px;
  width: 100%;
}

.page-x-s__app-image {
  width: 250px;
  height: auto;
  border-radius: 10px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
}

.page-x-s__app-info {
  text-align: left;
  flex: 1;
  min-width: 300px;
}

.page-x-s__app-info h3 {
  font-size: 2em;
  color: #FFD700;
  margin-bottom: 15px;
}

.page-x-s__app-info p {
  text-align: left;
  margin-bottom: 25px;
  color: #B0B0B0;
}

.page-x-s__accordion {
  max-width: 900px;
  margin: 40px auto;
}

.page-x-s__accordion-item {
  background-color: #2A2A2A;
  margin-bottom: 15px;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.page-x-s__accordion-header {
  font-size: 1.4em;
  color: #FFD700;
  padding: 20px 30px;
  cursor: pointer;
  position: relative;
  margin: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.page-x-s__accordion-header::after {
  content: '+';
  font-size: 1.5em;
  color: #FFD700;
  transition: transform 0.3s ease;
}

.page-x-s__accordion-header.active::after {
  content: '-';
  transform: rotate(180deg);
}

.page-x-s__accordion-content {
  padding: 0 30px 20px 30px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.5s ease-out;
}

.page-x-s__accordion-content p {
    text-align: left;
    margin-bottom: 15px;
    color: #B0B0B0;
}

.page-x-s__link {
    color: #FFD700;
    text-decoration: none;
    font-weight: bold;
    transition: color 0.3s ease;
}

.page-x-s__link:hover {
    color: #e6c200;
    text-decoration: underline;
}

.page-x-s__cta {
  background-color: #2A2A2A;
  padding: 80px 0;
  text-align: center;
  border-top: 5px solid #FFD700;
}

.page-x-s__cta p {
  font-size: 1.2em;
  margin-bottom: 40px;
  color: #B0B0B0;
}

/* Responsive Design */
@media (max-width: 1024px) {
  .page-x-s__hero-title {
    font-size: 3em;
  }
  .page-x-s__section-title {
    font-size: 2em;
  }
  .page-x-s__grid--2-cols {
    grid-template-columns: 1fr;
  }
  .page-x-s__app-download {
    flex-direction: column;
    text-align: center;
  }
  .page-x-s__app-info {
    text-align: center;
  }
  .page-x-s__app-info p {
      text-align: center;
  }
}

@media (max-width: 768px) {
  .page-x-s__hero {
    padding: 80px 0 60px 0;
  }
  .page-x-s__hero-title {
    font-size: 2.5em;
  }
  .page-x-s__hero-description {
    font-size: 1em;
  }
  .page-x-s__hero-actions {
    flex-direction: column;
    gap: 15px;
  }
  .page-x-s__btn {
    width: 80%;
  }
  .page-x-s__section-title {
    font-size: 1.8em;
  }
  .page-x-s__intro, .page-x-s__features, .page-x-s__types, .page-x-s__guide, .page-x-s__tips, .page-x-s__mobile-app, .page-x-s__faq, .page-x-s__cta {
    padding: 60px 0;
  }
  .page-x-s__image-full {
      height: 300px;
  }
  .page-x-s__type-card .page-x-s__type-title {
    font-size: 1.5em;
  }
  .page-x-s__feature-title {
    font-size: 1.4em;
  }
  .page-x-s__steps li::before {
      top: 15px;
      left: 15px;
  }
  .page-x-s__step-title {
      margin-top: 30px;
      font-size: 1.3em;
  }
  .page-x-s__accordion-header {
      font-size: 1.2em;
      padding: 15px 20px;
  }
}

@media (max-width: 480px) {
  .page-x-s__hero-title {
    font-size: 2em;
  }
  .page-x-s__hero-description {
    font-size: 0.9em;
  }
  .page-x-s__btn {
    width: 90%;
    padding: 12px 25px;
    font-size: 1em;
  }
  .page-x-s__section-title {
    font-size: 1.5em;
    padding-top: 40px;
  }
  .page-x-s__intro, .page-x-s__features, .page-x-s__types, .page-x-s__guide, .page-x-s__tips, .page-x-s__mobile-app, .page-x-s__faq, .page-x-s__cta {
    padding: 40px 0;
  }
  .page-x-s__image-full {
      height: 200px;
  }
  .page-x-s__feature-item, .page-x-s__type-card {
    padding: 20px;
  }
  .page-x-s__type-image {
      height: 180px;
  }
  .page-x-s__app-image {
      width: 200px;
  }
  .page-x-s__app-info h3 {
      font-size: 1.6em;
  }
  .page-x-s__app-download {
      padding: 20px;
  }
  .page-x-s__accordion-header {
      font-size: 1.1em;
      padding: 12px 15px;
  }
  .page-x-s__accordion-content {
      padding: 0 15px 15px 15px;
  }
}