.page-download {
  --primary-color: #FF8C1A;
  --secondary-color: #FFA53A;
  --card-bg: #17191F;
  --main-bg: #0D0E12;
  --text-main: #FFF3E6;
  --border-color: #A84F0C;
  --glow-color: #FFB04D;
  --deep-orange: #D96800;

  font-family: Arial, sans-serif;
  color: var(--text-main);
  background-color: var(--main-bg);
  line-height: 1.6;
}

.page-download__container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  box-sizing: border-box;
}

.page-download__section-title {
  font-size: 2.5em;
  color: var(--secondary-color);
  text-align: center;
  margin-bottom: 40px;
  font-weight: bold;
  line-height: 1.2;
}

.page-download__text-block {
  font-size: 1.1em;
  margin-bottom: 20px;
  text-align: center;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.page-download__cta-button {
  display: inline-block;
  padding: 15px 30px;
  background: linear-gradient(180deg, var(--secondary-color) 0%, var(--deep-orange) 100%);
  color: var(--text-main);
  text-decoration: none;
  border-radius: 8px;
  font-weight: bold;
  font-size: 1.1em;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  border: none;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(255, 165, 58, 0.4);
  text-align: center;
}

.page-download__cta-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(255, 165, 58, 0.6);
}

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

.page-download__cta-button--large {
  font-size: 1.3em;
  padding: 18px 35px;
}

/* Hero Section */
.page-download__hero-section {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  padding-top: 10px; /* body已承担 --header-offset */
  text-align: center;
  overflow: hidden;
}

.page-download__hero-image-wrapper {
  width: 100%;
  max-width: 100%;
  margin-bottom: 30px;
}

.page-download__hero-image {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 10px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
}

.page-download__hero-content {
  max-width: 900px;
  margin-top: 20px;
}

.page-download__hero-title {
  font-size: clamp(2em, 4vw, 3.2em); /* Use clamp for H1 */
  color: var(--primary-color);
  margin-bottom: 20px;
  font-weight: 800;
  line-height: 1.2;
}

.page-download__hero-description {
  font-size: 1.2em;
  color: var(--text-main);
  margin-bottom: 30px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* Intro Section */
.page-download__intro-section {
  padding: 80px 0;
  background-color: var(--main-bg);
}

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

.page-download__feature-item {
  background-color: var(--card-bg);
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
}

.page-download__feature-title {
  font-size: 1.6em;
  color: var(--primary-color);
  margin-bottom: 15px;
  text-align: center;
}

.page-download__feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.page-download__feature-list li {
  margin-bottom: 10px;
  padding-left: 25px;
  position: relative;
  color: var(--text-main);
}

.page-download__feature-list li::before {
  content: '✓';
  color: var(--secondary-color);
  position: absolute;
  left: 0;
  font-weight: bold;
}

/* Guide Section */
.page-download__guide-section {
  padding: 80px 0;
  background-color: var(--main-bg);
}

.page-download__platform-guide {
  background-color: var(--card-bg);
  padding: 40px;
  border-radius: 10px;
  margin-bottom: 40px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
  text-align: center;
}

.page-download__platform-title {
  font-size: 2em;
  color: var(--secondary-color);
  margin-bottom: 30px;
}

.page-download__platform-content {
  display: flex;
  align-items: center;
  gap: 40px;
  margin-bottom: 30px;
}

.page-download__platform-content--reverse {
  flex-direction: row-reverse;
}

.page-download__platform-image {
  width: 50%;
  height: auto;
  display: block;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  min-width: 200px;
}

.page-download__steps {
  width: 50%;
  text-align: left;
}

.page-download__steps h4 {
  font-size: 1.4em;
  color: var(--primary-color);
  margin-bottom: 15px;
}

.page-download__steps ol {
  list-style-type: decimal;
  padding-left: 25px;
  margin-bottom: 15px;
  color: var(--text-main);
}

.page-download__steps ol li {
  margin-bottom: 8px;
}

.page-download__steps p {
  font-size: 1em;
  color: var(--text-main);
}

.page-download__qr-section {
  background-color: var(--card-bg);
  padding: 40px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
  text-align: center;
}

.page-download__qr-title {
  font-size: 2em;
  color: var(--secondary-color);
  margin-bottom: 20px;
}

.page-download__qr-code-wrapper {
  margin: 30px auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-download__qr-code-image {
  width: 400px;
  height: 300px;
  object-fit: contain;
  display: block;
  border-radius: 8px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  min-width: 200px;
  min-height: 200px;
}

.page-download__qr-instruction {
  margin-top: 20px;
  font-size: 1.1em;
  color: var(--text-main);
}

/* Why Choose Section */
.page-download__why-choose-section {
  padding: 80px 0;
  background-color: var(--main-bg);
}

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

.page-download__benefit-card {
  background-color: var(--card-bg);
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  border: 1px solid var(--border-color);
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.page-download__benefit-icon {
  width: 300px;
  height: 225px;
  object-fit: contain;
  margin-bottom: 20px;
  min-width: 200px;
  min-height: 200px;
}

.page-download__benefit-title {
  font-size: 1.6em;
  color: var(--primary-color);
  margin-bottom: 15px;
}

.page-download__benefit-description {
  font-size: 1em;
  color: var(--text-main);
}

/* FAQ Section */
.page-download__faq-section {
  padding: 80px 0;
  background-color: var(--main-bg);
}

.page-download__faq-list {
  margin-top: 40px;
  max-width: 900px;
  margin-left: auto;
  margin-right: auto;
}

.page-download__faq-item {
  background-color: var(--card-bg);
  margin-bottom: 15px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  overflow: hidden;
}

.page-download__faq-item summary {
  list-style: none;
  padding: 20px 25px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.2em;
  font-weight: bold;
  color: var(--primary-color);
  background-color: var(--card-bg);
  border-bottom: 1px solid transparent; /* default */
  transition: background-color 0.3s ease;
}

.page-download__faq-item summary::-webkit-details-marker {
  display: none;
}

.page-download__faq-item summary:hover {
  background-color: rgba(255, 140, 26, 0.1);
}

.page-download__faq-item[open] summary {
  border-bottom-color: var(--border-color);
  background-color: rgba(255, 140, 26, 0.15);
}

.page-download__faq-qtext {
  flex-grow: 1;
}

.page-download__faq-toggle {
  font-size: 1.5em;
  line-height: 1;
  margin-left: 15px;
  color: var(--secondary-color);
}

.page-download__faq-answer {
  padding: 15px 25px 20px;
  font-size: 1em;
  color: var(--text-main);
  background-color: var(--card-bg);
}

/* Conclusion Section */
.page-download__conclusion-section {
  padding: 80px 0;
  background-color: var(--main-bg);
  text-align: center;
}

.page-download__conclusion-section .page-download__cta-button {
  margin-top: 40px;
}

/* Responsive Styles */
@media (max-width: 1024px) {
  .page-download__hero-title {
    font-size: clamp(2em, 5vw, 2.8em);
  }

  .page-download__platform-content {
    flex-direction: column;
    text-align: center;
  }

  .page-download__platform-content--reverse {
    flex-direction: column;
  }

  .page-download__platform-image,
  .page-download__steps {
    width: 100%;
  }

  .page-download__platform-image {
    margin-bottom: 20px;
  }

  .page-download__steps {
    text-align: center;
  }

  .page-download__steps ol {
    padding-left: 0;
    text-align: left;
    display: inline-block; /* Center list items */
  }
}

@media (max-width: 768px) {
  .page-download {
    font-size: 16px;
    line-height: 1.6;
  }

  .page-download__container {
    padding-left: 15px !important;
    padding-right: 15px !important;
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-download__hero-section,
  .page-download__intro-section,
  .page-download__guide-section,
  .page-download__why-choose-section,
  .page-download__faq-section,
  .page-download__conclusion-section {
    padding: 40px 0;
  }
  
  .page-download__hero-section {
    padding-top: 10px !important; /* body 已承担 --header-offset */
  }

  .page-download__section-title {
    font-size: 2em;
    margin-bottom: 30px;
  }

  .page-download__hero-title {
    font-size: clamp(1.8em, 7vw, 2.5em);
  }

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

  .page-download__cta-button {
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
    padding-left: 15px;
    padding-right: 15px;
    margin-bottom: 15px;
  }

  .page-download__hero-image,
  .page-download__platform-image,
  .page-download__qr-code-image,
  .page-download__benefit-icon {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    display: block !important;
    min-width: 200px !important;
    min-height: 200px !important;
  }
  
  .page-download__hero-image-wrapper,
  .page-download__platform-content,
  .page-download__qr-code-wrapper,
  .page-download__benefits-grid,
  .page-download__features-grid,
  .page-download__faq-list {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    overflow: hidden !important;
    padding-left: 15px;
    padding-right: 15px;
  }

  .page-download__qr-code-image {
    width: 250px !important; /* Specific size for QR code */
    height: 250px !important;
    margin: 0 auto 20px auto;
  }

  .page-download__feature-item,
  .page-download__benefit-card,
  .page-download__platform-guide,
  .page-download__qr-section,
  .page-download__faq-item {
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    width: 100% !important;
    max-width: 100% !important;
    box-sizing: border-box !important;
  }

  .page-download__faq-item summary {
    font-size: 1.1em;
    padding: 15px 20px;
  }

  .page-download__faq-answer {
    padding: 10px 20px 15px;
  }

  .page-download__cta-button--large {
    font-size: 1.1em;
    padding: 15px 25px;
  }
}