/* style/download.css */

:root {
  --page-download-primary-color: #113B7A;
  --page-download-secondary-color: #1D5FD1;
  --page-download-text-main: #F3F8FF;
  --page-download-text-secondary: #AFC4E8;
  --page-download-card-bg: #10233F;
  --page-download-border-color: #244D84;
  --page-download-btn-gradient: linear-gradient(180deg, #2B73F6 0%, #1144A6 100%);
  --page-download-glow-color: #4FA8FF;
  --page-download-gold-color: #F2C14E;
  --page-download-divider-color: #1B3357;
  --page-download-deep-navy: #08162B;
}

.page-download {
  color: var(--page-download-text-main); /* Default text color for the page, contrasting with body bg */
  background-color: transparent; /* Body background is handled by shared.css */
  font-family: Arial, sans-serif;
  line-height: 1.6;
}

.page-download__container {
  max-width: 1150px;
  margin: 0 auto;
  padding: 0 20px;
  box-sizing: border-box;
}

.page-download__hero-section {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding-bottom: 40px; /* Space between image and content */
  padding-top: 10px; /* Small top padding, body handles header offset */
  background-color: var(--page-download-deep-navy);
}

.page-download__hero-image {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  max-height: 675px;
  margin-bottom: 20px;
}

.page-download__hero-content {
  max-width: 800px;
  padding: 0 20px;
  z-index: 1;
}

.page-download__main-title {
  font-size: 2.8em;
  font-weight: bold;
  color: var(--page-download-gold-color);
  margin-bottom: 15px;
  line-height: 1.2;
  text-shadow: 0 0 10px rgba(0, 0, 0, 0.5);
}

.page-download__description {
  font-size: 1.1em;
  color: var(--page-download-text-secondary);
  margin-bottom: 30px;
}

.page-download__cta-buttons {
  display: flex;
  gap: 15px;
  justify-content: center;
  flex-wrap: wrap;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  overflow: hidden;
}

.page-download__btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 30px;
  border-radius: 8px;
  font-size: 1.1em;
  font-weight: bold;
  text-decoration: none;
  color: var(--page-download-text-main);
  background: var(--page-download-btn-gradient);
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  max-width: 100%;
  box-sizing: border-box;
  white-space: normal;
  word-wrap: break-word;
}

.page-download__btn:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.page-download__btn--ios, .page-download__btn--android {
  background: var(--page-download-btn-gradient);
}

.page-download__btn--primary {
  background: var(--page-download-btn-gradient);
  color: var(--page-download-text-main);
}

.page-download__btn--secondary {
  background: transparent;
  border: 2px solid var(--page-download-primary-color);
  color: var(--page-download-primary-color);
}

.page-download__btn--secondary:hover {
  background: var(--page-download-primary-color);
  color: var(--page-download-text-main);
}

.page-download__btn--large {
  padding: 18px 40px;
  font-size: 1.2em;
}

.page-download__section {
  padding: 60px 0;
  background-color: var(--page-download-deep-navy);
  border-top: 1px solid var(--page-download-divider-color);
}

.page-download__section-title {
  font-size: 2.2em;
  color: var(--page-download-gold-color);
  text-align: center;
  margin-bottom: 20px;
  font-weight: bold;
  text-shadow: 0 0 8px rgba(0, 0, 0, 0.4);
}

.page-download__section-intro {
  font-size: 1.1em;
  color: var(--page-download-text-secondary);
  text-align: center;
  max-width: 800px;
  margin: 0 auto 40px auto;
}

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

.page-download__benefit-card {
  background-color: var(--page-download-card-bg);
  border-radius: 12px;
  padding: 30px;
  text-align: center;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
  border: 1px solid var(--page-download-border-color);
  transition: transform 0.3s ease;
}

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

.page-download__benefit-icon {
  width: 100%;
  max-width: 200px;
  height: auto;
  margin-bottom: 20px;
  display: block;
  margin-left: auto;
  margin-right: auto;
  border-radius: 8px;
  object-fit: cover;
}

.page-download__card-title {
  font-size: 1.5em;
  color: var(--page-download-gold-color);
  margin-bottom: 10px;
}

.page-download__card-text {
  color: var(--page-download-text-secondary);
  font-size: 0.95em;
}

.page-download__download-guide .page-download__section-title {
  margin-bottom: 60px;
}

.page-download__guide-steps {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.page-download__step-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background-color: var(--page-download-card-bg);
  border-radius: 12px;
  padding: 40px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
  border: 1px solid var(--page-download-border-color);
}

.page-download__step-item:nth-child(even) {
  flex-direction: column-reverse;
}

.page-download__step-title {
  font-size: 1.8em;
  color: var(--page-download-gold-color);
  margin-bottom: 15px;
  font-weight: bold;
}

.page-download__step-text {
  color: var(--page-download-text-secondary);
  font-size: 1.05em;
  margin-bottom: 25px;
  max-width: 700px;
}

.page-download__step-image {
  width: 100%;
  max-width: 680px;
  height: auto;
  border-radius: 10px;
  object-fit: cover;
  margin-top: 25px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.page-download__qr-codes {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 30px;
  margin-top: 30px;
}

.page-download__qr-figure {
  background-color: #ffffff;
  padding: 15px;
  border-radius: 10px;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
  text-align: center;
  max-width: 330px;
  width: 100%;
}

.page-download__qr-image {
  width: 100%;
  height: auto;
  max-width: 300px;
  display: block;
  margin: 0 auto 10px auto;
}

.page-download__qr-caption {
  color: var(--page-download-primary-color);
  font-weight: bold;
  font-size: 1em;
}

.page-download__cta-box {
  background: linear-gradient(90deg, var(--page-download-primary-color), var(--page-download-secondary-color));
  border-radius: 12px;
  padding: 40px;
  text-align: center;
  margin-top: 60px;
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.5);
  border: 1px solid var(--page-download-glow-color);
}

.page-download__cta-text {
  font-size: 1.6em;
  color: var(--page-download-text-main);
  margin-bottom: 25px;
  font-weight: bold;
}

.page-download__system-requirements {
  background-color: var(--page-download-deep-navy);
}

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

.page-download__requirement-item {
  background-color: var(--page-download-card-bg);
  border-radius: 12px;
  padding: 30px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.4);
  border: 1px solid var(--page-download-border-color);
}

.page-download__item-title {
  font-size: 1.6em;
  color: var(--page-download-gold-color);
  margin-bottom: 15px;
  font-weight: bold;
}

.page-download__item-list {
  list-style: none;
  padding: 0;
  margin: 0;
  color: var(--page-download-text-secondary);
}

.page-download__item-list li {
  margin-bottom: 8px;
  position: relative;
  padding-left: 25px;
}

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

.page-download__note {
  text-align: center;
  font-size: 0.9em;
  color: var(--page-download-text-secondary);
  margin-top: 30px;
}

.page-download__faq-section {
  background-color: var(--page-download-primary-color); /* Darker section for contrast */
  color: var(--page-download-text-main);
  padding: 80px 0;
}

.page-download__faq-section .page-download__section-title {
  color: var(--page-download-gold-color);
}

.page-download__faq-list {
  max-width: 900px;
  margin: 40px auto 0 auto;
}

.page-download__faq-item {
  background-color: var(--page-download-card-bg);
  border-radius: 10px;
  margin-bottom: 15px;
  border: 1px solid var(--page-download-border-color);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
  overflow: hidden;
}

.page-download__faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 25px;
  font-size: 1.2em;
  font-weight: bold;
  color: var(--page-download-text-main);
  cursor: pointer;
  background-color: var(--page-download-card-bg);
  list-style: none; /* For details/summary */
}

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

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

.page-download__faq-toggle {
  font-size: 1.5em;
  font-weight: bold;
  margin-left: 15px;
  color: var(--page-download-gold-color);
}

.page-download__faq-item[open] .page-download__faq-toggle::before {
  content: '-';
}

.page-download__faq-item:not([open]) .page-download__faq-toggle::before {
  content: '+';
}

.page-download__faq-answer {
  padding: 0 25px 20px 25px;
  font-size: 1em;
  color: var(--page-download-text-secondary);
  background-color: var(--page-download-card-bg);
  border-top: 1px solid var(--page-download-divider-color);
}

.page-download__faq-answer p {
  margin: 0;
}

.page-download__final-cta {
  background-color: var(--page-download-light-bg);
  padding: 80px 0;
  text-align: center;
}

.page-download__light-bg {
  background-color: #ffffff; /* Explicitly light background */
  color: #333333; /* Dark text for light background */
}

.page-download__text-contrast-fix {
  color: #333333 !important; /* Ensure dark text on light background */
}

.page-download__final-cta .page-download__section-title {
  color: var(--page-download-primary-color); /* Primary color for title on light bg */
}

.page-download__final-cta .page-download__section-intro {
  color: #555555; /* Darker secondary text for light bg */
  margin-bottom: 40px;
}

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

@media (max-width: 1024px) {
  .page-download__main-title {
    font-size: 2.5em;
  }
  .page-download__section-title {
    font-size: 2em;
  }
  .page-download__step-title {
    font-size: 1.6em;
  }
  .page-download__cta-text {
    font-size: 1.4em;
  }
  .page-download__btn {
    padding: 12px 25px;
    font-size: 1em;
  }
  .page-download__btn--large {
    padding: 16px 35px;
    font-size: 1.1em;
  }
  .page-download__benefits-grid, .page-download__requirements-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  }
  .page-download__faq-question {
    font-size: 1.1em;
  }
}

@media (max-width: 768px) {
  /* 1. 顶区标题 + 双 CTA */
  .page-download__hero-section {
    padding-top: 10px !important; /* Small top padding, body handles header offset */
    padding-bottom: 30px;
  }
  .page-download__main-title {
    font-size: 2em !important;
    margin-bottom: 10px;
  }
  .page-download__description {
    font-size: 1em;
    margin-bottom: 20px;
  }
  .page-download__cta-buttons {
    flex-direction: column;
    gap: 10px;
    width: 100%;
    max-width: 100%;
    padding: 0 15px;
    box-sizing: border-box;
  }
  .page-download__btn {
    width: 100% !important;
    max-width: 100% !important;
    padding: 12px 15px !important;
    font-size: 1em !important;
    white-space: normal !important;
    word-wrap: break-word !important;
    box-sizing: border-box !important;
  }
  .page-download__btn--large {
    font-size: 1.1em !important;
    padding: 15px 20px !important;
  }

  /* 2. 单栏长文容器 */
  .page-download__container {
    padding-left: 15px;
    padding-right: 15px;
  }
  .page-download__section {
    padding: 40px 0;
  }
  .page-download__section-title {
    font-size: 1.8em;
    margin-bottom: 15px;
  }
  .page-download__section-intro {
    font-size: 1em;
    margin-bottom: 30px;
  }
  .page-download__card-title {
    font-size: 1.3em;
  }
  .page-download__card-text {
    font-size: 0.9em;
  }
  .page-download__step-item {
    padding: 30px 20px;
  }
  .page-download__step-title {
    font-size: 1.5em;
  }
  .page-download__step-text {
    font-size: 0.95em;
  }
  .page-download__cta-box {
    padding: 30px 20px;
  }
  .page-download__cta-text {
    font-size: 1.3em;
  }

  /* 3. 通用图片与 figure */
  .page-download img {
    max-width: 100% !important;
    width: 100% !important;
    height: auto !important;
    box-sizing: border-box !important;
  }
  .page-download__hero-image {
    max-height: 400px;
  }
  .page-download__benefit-icon {
    max-width: 150px;
  }
  .page-download__step-image {
    max-width: 100%;
  }
  .page-download__qr-codes {
    flex-direction: column;
    gap: 20px;
  }
  .page-download__qr-figure {
    max-width: 100%;
    width: 100%;
  }
  .page-download__qr-image {
    max-width: 250px;
  }
  
  /* 4. 按钮与按钮容器 */
  .page-download__cta-buttons,
  .page-download__button-group,
  .page-download__btn-container {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    padding-left: 0;
    padding-right: 0;
    flex-wrap: wrap !important; /* Ensure wrapping for multiple buttons */
    gap: 10px;
  }
  .page-download__cta-box .page-download__btn {
    width: calc(100% - 30px) !important; /* Adjust for padding in cta-box */
    margin: 0 auto;
  }

  /* 5. FAQ 区块 */
  .page-download__benefits-grid, .page-download__requirements-grid {
    grid-template-columns: 1fr;
  }
  .page-download__benefit-card, .page-download__requirement-item {
    padding: 25px;
  }
  .page-download__faq-section {
    padding: 50px 0;
  }
  .page-download__faq-question {
    font-size: 1em;
    padding: 18px 20px;
  }
  .page-download__faq-answer {
    padding: 0 20px 18px 20px;
    font-size: 0.95em;
  }
  .page-download__final-cta .page-download__section-title {
    font-size: 1.6em;
  }
  .page-download__final-cta .page-download__section-intro {
    font-size: 0.95em;
  }
}