/* Download Page — Glassmorphism + Apple Whitespace */

/* ==================== 基础 ==================== */
*,
::after,
::before {
  box-sizing: border-box;
}

body.md3-body {
  margin: 0;
  padding: 0;
  background: var(--bg-primary);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
}

/* ==================== 导航 ==================== */
/* Download 页自有导航已移至 header.html 公共组件 */

.md3-main {
  margin-top: 48px;
}

/* ==================== Hero 区域 ==================== */
.md3-hero-section {
  padding: 80px 0 60px;
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}

.md3-hero-container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

.md3-hero-content {
  display: flex;
  align-items: center;
  gap: 64px;
}

.md3-hero-text {
  flex: 1;
  min-width: 0;
}

.md3-hero-title {
  font-size: 48px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.15;
  margin: 0 0 16px 0;
  letter-spacing: -1px;
}

.md3-brand-highlight {
  color: var(--md-primary);
}

.md3-hero-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0 0 32px 0;
}

/* ==================== 下载按钮 ==================== */
.md3-download-section {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.md3-download-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.md3-download-btn {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 28px;
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: var(--transition);
  font-size: 15px;
}

.md3-download-primary {
  background: var(--md-primary);
  color: var(--md-on-primary);
}

.md3-download-primary:hover {
  opacity: 0.88;
}

.md3-download-primary .material-icons {
  font-size: 22px;
}

.md3-download-secondary {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  color: var(--text-primary);
  border: 1px solid var(--border-color);
}

.md3-download-secondary:hover {
  border-color: var(--md-outline);
  box-shadow: var(--shadow-sm);
}

.md3-download-secondary .material-icons-outlined {
  font-size: 22px;
  color: var(--text-secondary);
}

.md3-btn-text {
  display: flex;
  flex-direction: column;
}

.md3-btn-title {
  font-weight: 600;
  line-height: 1.3;
}

.md3-btn-version {
  font-size: 12px;
  opacity: 0.7;
  line-height: 1.3;
}

.md3-changelog-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--md-primary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}

.md3-changelog-link:hover {
  opacity: 0.75;
}

/* ==================== Hero 图片 ==================== */
.md3-hero-image {
  flex-shrink: 0;
  width: 280px;
}

.md3-hero-image-container {
  position: relative;
}

.md3-hero-app-image {
  width: 100%;
  height: auto;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

/* 装饰元素 — 极简柔和 */
.md3-hero-image-decoration,
.md3-hero-decoration-2,
.md3-hero-decoration-3 {
  position: absolute;
  border-radius: 50%;
  opacity: 0.15;
}

.md3-hero-image-decoration {
  width: 120px;
  height: 120px;
  background: var(--md-primary);
  top: -40px;
  right: -30px;
}

.md3-hero-decoration-2 {
  width: 80px;
  height: 80px;
  background: var(--text-tertiary);
  bottom: -20px;
  left: -20px;
}

.md3-hero-decoration-3 {
  width: 50px;
  height: 50px;
  background: var(--md-primary);
  bottom: 40%;
  right: -25px;
  opacity: 0.1;
}

/* ==================== Section 公共 ==================== */
.md3-section {
  padding: 80px 0;
}

.md3-section-container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

.md3-section-header {
  text-align: center;
  margin-bottom: 48px;
}

.md3-section-title {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0 0 12px 0;
  letter-spacing: -0.5px;
}

.md3-section-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.5;
}

.md3-section-footer {
  text-align: center;
  margin-top: 40px;
}

.md3-contact-info {
  font-size: 14px;
  color: var(--text-secondary);
}

.md3-contact-link {
  color: var(--md-primary);
  text-decoration: none;
  font-weight: 500;
}

.md3-contact-link:hover {
  text-decoration: underline;
}

/* ==================== 截图轮播 ==================== */
.md3-screenshot-section {
  background: var(--bg-secondary);
}

.md3-screenshot-carousel {
  position: relative;
}

.md3-screenshot-swiper {
  padding: 8px 0 48px;
}

.md3-screenshot-swiper .swiper-slide {
  transition: all 0.4s ease;
  opacity: 0.55;
  transform: scale(0.9);
}

.md3-screenshot-swiper .swiper-slide-active {
  opacity: 1;
  transform: scale(1);
}

.md3-screenshot-card {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--bg-primary);
  border: 1px solid var(--border-color);
}

.md3-screenshot-image {
  width: 100%;
  height: auto;
  display: block;
}

.md3-screenshot-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.2);
  opacity: 0;
  transition: opacity 0.3s ease;
  cursor: pointer;
}

.md3-screenshot-overlay:hover {
  opacity: 1;
}

.md3-screenshot-overlay .material-icons {
  font-size: 36px;
  color: white;
}

/* 轮播导航按钮 */
.md3-carousel-button {
  width: 40px !important;
  height: 40px !important;
  background: var(--glass-bg-heavy) !important;
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border-radius: 50% !important;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  color: var(--text-primary) !important;
}

.md3-carousel-button::after {
  display: none;
}

.md3-carousel-button .material-icons {
  font-size: 20px;
}

.md3-carousel-button:hover {
  border-color: var(--md-primary);
  color: var(--md-primary) !important;
}

/* 分页器 */
.md3-carousel-pagination {
  bottom: 0 !important;
}

.md3-carousel-pagination .swiper-pagination-bullet {
  width: 8px;
  height: 8px;
  background: var(--md-outline);
  opacity: 0.4;
  transition: all 0.3s ease;
}

.md3-carousel-pagination .swiper-pagination-bullet-active {
  background: var(--md-primary);
  opacity: 1;
  width: 24px;
  border-radius: var(--radius-full);
}

/* ==================== 用户评价 ==================== */
.md3-testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.md3-testimonial-card {
  background: var(--glass-bg);
  backdrop-filter: blur(var(--glass-blur));
  -webkit-backdrop-filter: blur(var(--glass-blur));
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
}

.md3-testimonial-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  border-color: var(--md-outline);
}

.md3-testimonial-quote {
  margin-bottom: 12px;
}

.md3-testimonial-quote .material-icons {
  font-size: 28px;
  color: var(--text-tertiary);
}

.md3-testimonial-stars {
  display: flex;
  gap: 2px;
  margin-bottom: 16px;
}

.md3-testimonial-stars .material-icons {
  font-size: 16px;
  color: #fbbf24;
}

.md3-testimonial-text {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-primary);
  margin: 0 0 20px 0;
}

.md3-testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.md3-avatar-image {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
}

.md3-testimonial-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
}

.md3-testimonial-source {
  font-size: 12px;
  color: var(--text-secondary);
  margin: 2px 0 0 0;
}

/* ==================== FAQ ==================== */
.md3-faq-list {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.md3-faq-item {
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition);
}

.md3-faq-item:hover {
  border-color: var(--md-outline);
}

.md3-faq-item.active {
  border-color: var(--md-primary);
}

.md3-faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: none;
  border: none;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  cursor: pointer;
  text-align: left;
  transition: background 0.2s ease;
}

.md3-faq-question:hover {
  background: var(--bg-secondary);
}

.md3-faq-icon {
  font-size: 22px;
  color: var(--text-tertiary);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}

.md3-faq-item.active .md3-faq-icon {
  transform: rotate(180deg);
  color: var(--md-primary);
}

.md3-faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 20px;
}

.md3-faq-item.active .md3-faq-answer {
  max-height: 300px;
  padding: 0 20px 16px;
}

.md3-faq-answer p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin: 0 0 8px 0;
}

.md3-faq-answer p:last-child {
  margin-bottom: 0;
}

/* ==================== 滚动入场动画 ==================== */
.md3-animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.md3-animate-on-scroll.md3-visible {
  opacity: 1;
  transform: translateY(0);
}

.md3-animate-delay-1 {
  transition-delay: 0.1s;
}

.md3-animate-delay-2 {
  transition-delay: 0.2s;
}

.md3-animate-delay-3 {
  transition-delay: 0.3s;
}

/* ==================== 响应式 ==================== */
@media (max-width: 768px) {
  .md3-hero-section {
    padding: 48px 0 40px;
  }

  .md3-hero-content {
    flex-direction: column;
    gap: 32px;
    text-align: center;
  }

  .md3-hero-title {
    font-size: 32px;
  }

  .md3-hero-subtitle {
    font-size: 15px;
    margin-bottom: 24px;
  }

  .md3-download-buttons {
    flex-direction: column;
    align-items: center;
  }

  .md3-download-btn {
    width: 100%;
    max-width: 320px;
    justify-content: center;
  }

  .md3-changelog-link {
    justify-content: center;
  }

  .md3-hero-image {
    width: 200px;
    margin: 0 auto;
  }

  .md3-section {
    padding: 48px 0;
  }

  .md3-section-title {
    font-size: 28px;
  }

  .md3-section-header {
    margin-bottom: 32px;
  }

  .md3-testimonial-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .md3-testimonial-card {
    padding: 20px;
  }

  .md3-carousel-button {
    display: none !important;
  }
}

@media (max-width: 480px) {
  .md3-hero-title {
    font-size: 28px;
  }

  .md3-section-title {
    font-size: 24px;
  }
}

/* ==================== 暗色模式微调 ==================== */
@media (prefers-color-scheme: dark) {
  .md3-hero-section {
    background: var(--bg-secondary);
  }

  .md3-screenshot-section {
    background: var(--bg-secondary);
  }

  .md3-screenshot-card {
    background: var(--bg-tertiary);
    border-color: var(--border-color);
  }

  .md3-download-secondary {
    background: var(--glass-bg);
    border-color: var(--border-color);
  }
}