/* style/download.css */

/* Variables */
:root {
  --primary-color: #26A9E0;
  --secondary-color: #FFFFFF;
  --text-dark: #333333;
  --text-light: #ffffff;
  --background-dark: #0a0a0a; /* From body background */
  --login-color: #EA7C07;
}

/* Base styles for the page content */
.page-download {
  font-family: Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-light); /* Default text color for dark body background */
  background-color: var(--background-dark);
}

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

.page-download__section-title {
  font-size: 2.5em;
  font-weight: bold;
  text-align: center;
  margin-bottom: 20px;
  color: var(--secondary-color);
  line-height: 1.2;
}

.page-download__section-intro {
  font-size: 1.1em;
  text-align: center;
  margin-bottom: 40px;
  color: rgba(255, 255, 255, 0.8);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* Hero Section */
.page-download__hero-section {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 500px;
  overflow: hidden;
  padding: 10px 0 60px 0; /* Small padding-top, body handles header offset */
}

.page-download__hero-image {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
  filter: brightness(0.5); /* Darken image for text readability */
}

.page-download__hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 20px;
  max-width: 900px;
}

.page-download__main-title {
  font-size: clamp(2.2em, 4vw, 3.5em); /* Responsive font size */
  font-weight: 700;
  color: var(--secondary-color);
  margin-bottom: 15px;
  line-height: 1.2;
}

.page-download__description {
  font-size: 1.2em;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 30px;
}

.page-download__cta-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.page-download__btn-primary,
.page-download__btn-secondary {
  display: inline-block;
  padding: 15px 30px;
  border-radius: 8px;
  text-decoration: none;
  font-weight: bold;
  font-size: 1.1em;
  transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
  box-sizing: border-box;
  max-width: 100%;
  white-space: normal;
  word-wrap: break-word;
  text-align: center;
}

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

.page-download__btn-primary:hover {
  background-color: darken(var(--primary-color), 10%);
  border-color: darken(var(--primary-color), 10%);
}

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

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

/* Benefits Section */
.page-download__benefits-section {
  padding: 80px 0;
  background-color: var(--background-dark);
  color: var(--text-light);
}

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

.page-download__benefit-card {
  background-color: rgba(255, 255, 255, 0.05);
  padding: 30px;
  border-radius: 10px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

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

.page-download__card-title {
  font-size: 1.4em;
  font-weight: bold;
  margin-bottom: 10px;
  color: var(--secondary-color);
}

.page-download__card-text {
  font-size: 1em;
  color: rgba(255, 255, 255, 0.7);
}

/* How to Download Section */
.page-download__how-to-download {
  padding: 80px 0;
  background-color: var(--secondary-color);
  color: var(--text-dark);
}

.page-download__how-to-download .page-download__section-title,
.page-download__how-to-download .page-download__section-intro {
  color: var(--text-dark);
}

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

.page-download__download-steps .page-download__step-card {
  background-color: #f9f9f9;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.page-download__download-steps .page-download__card-title {
  color: var(--primary-color);
  margin-bottom: 15px;
}

.page-download__download-steps .page-download__card-text {
  color: var(--text-dark);
  margin-bottom: 20px;
}

.page-download__qr-code,
.page-download__step-image {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin-top: 15px;
  display: block;
}

/* App Features Section */
.page-download__app-features {
  padding: 80px 0;
  background-color: var(--background-dark);
  color: var(--text-light);
}

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

.page-download__feature-item {
  background-color: rgba(255, 255, 255, 0.05);
  padding: 25px;
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.page-download__feature-title {
  font-size: 1.3em;
  font-weight: bold;
  color: var(--primary-color);
  margin-bottom: 10px;
}

.page-download__feature-text {
  font-size: 1em;
  color: rgba(255, 255, 255, 0.7);
}

/* System Requirements Section */
.page-download__system-requirements {
  padding: 80px 0;
  background-color: var(--secondary-color);
  color: var(--text-dark);
}

.page-download__system-requirements .page-download__section-title,
.page-download__system-requirements .page-download__section-intro {
  color: var(--text-dark);
}

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

.page-download__requirement-card {
  background-color: #f9f9f9;
  padding: 30px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.page-download__requirement-card .page-download__card-title {
  color: var(--primary-color);
  margin-bottom: 15px;
}

.page-download__requirement-card ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.page-download__requirement-card li {
  margin-bottom: 10px;
  padding-left: 25px;
  position: relative;
  color: var(--text-dark);
}

.page-download__requirement-card li::before {
  content: '✔';
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: bold;
}

.page-download__additional-info {
  font-size: 0.95em;
  text-align: center;
  margin-top: 40px;
  color: var(--text-dark);
}

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

.page-download__faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.page-download__faq-item {
  background-color: rgba(255, 255, 255, 0.05);
  margin-bottom: 15px;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.page-download__faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 25px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: bold;
  font-size: 1.1em;
  color: var(--secondary-color);
  background-color: rgba(255, 255, 255, 0.1);
  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, 255, 255, 0.15);
}

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

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

.page-download__faq-answer {
  padding: 20px 25px;
  background-color: rgba(255, 255, 255, 0.03);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  color: rgba(255, 255, 255, 0.7);
  font-size: 1em;
}

/* Final CTA Section */
.page-download__cta-final {
  padding: 80px 0;
  text-align: center;
  background-color: var(--primary-color);
  color: var(--secondary-color);
}

.page-download__cta-final .page-download__section-title,
.page-download__cta-final .page-download__section-intro {
  color: var(--secondary-color);
}

.page-download__btn-large {
  padding: 18px 40px;
  font-size: 1.2em;
  background-color: var(--login-color); /* Use login color for high contrast CTA */
  border-color: var(--login-color);
  color: var(--secondary-color);
}

.page-download__btn-large:hover {
  background-color: darken(var(--login-color), 10%);
  border-color: darken(var(--login-color), 10%);
}

/* Responsive Design */
@media (max-width: 1024px) {
  .page-download__section-title {
    font-size: 2em;
  }

  .page-download__main-title {
    font-size: clamp(2em, 5vw, 3em);
  }
}

@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 {
    min-height: 400px;
    padding: 10px 0 40px 0; /* Small padding-top, body handles header offset */
  }

  .page-download__main-title {
    font-size: clamp(1.8em, 6vw, 2.5em);
  }

  .page-download__description {
    font-size: 1em;
  }

  .page-download__cta-buttons {
    flex-direction: column;
    gap: 15px;
  }

  .page-download__btn-primary,
  .page-download__btn-secondary,
  .page-download a[class*="button"],
  .page-download a[class*="btn"] {
    max-width: 100% !important;
    width: 100% !important;
    box-sizing: border-box !important;
    white-space: normal !important;
    word-wrap: break-word !important;
    padding-left: 15px;
    padding-right: 15px;
  }

  .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: 15px;
    padding-right: 15px;
    flex-wrap: wrap !important;
    gap: 10px;
  }

  .page-download img {
    max-width: 100% !important;
    height: auto !important;
    display: block !important;
  }

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

  .page-download__video-section {
    padding-top: 10px !important; /* body 已承担 --header-offset，此处禁止 var(--header-offset) */
  }

  .page-download__benefits-grid,
  .page-download__download-steps,
  .page-download__features-grid,
  .page-download__requirements-grid {
    grid-template-columns: 1fr;
  }

  .page-download__benefit-card,
  .page-download__step-card,
  .page-download__feature-item,
  .page-download__requirement-card,
  .page-download__faq-item {
    padding: 20px;
  }

  .page-download__faq-item summary {
    font-size: 1em;
    padding: 15px 20px;
  }

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

/* Utility for darken function in CSS (pseudo-code, real implementation would use SCSS or JS) */
/* This is a placeholder for the darken() function. In a real project, this would be preprocessed or handled differently. */
/* For direct CSS, colors would be manually adjusted or CSS variables used with calc() */
/* Example of manual adjustment if darken() is not available in direct CSS: */
/* background-color: #1a8ccb; (darkened from #26A9E0) */
/* background-color: #c06300; (darkened from #EA7C07) */