.page-home {
  --page-home-hero-bg: #0B1D3A;
  --page-home-accent: #FF6B35;
  --page-home-accent-light: #FF9A66;
  --page-home-card-bg: #FFFFFF;
  --page-home-text-light: #F0F4F8;
  --page-home-text-dark: #0B1D3A;
  --page-home-text-mid: #4A5568;
  --page-home-neutral: #E2E8F0;
  --page-home-font: Inter, sans-serif;
  --page-home-radius: 4px;
  --page-home-gap: 2rem;
  display: flex;
  flex-direction: column;
  gap: 0;
  background: var(--page-home-neutral);
  color: var(--page-home-text-dark);
  font-family: var(--page-home-font);
  line-height: 1.6;
}

/* 移动端优先：窄屏单列，折叠留白 */
.page-home-hero {
  display: flex;
  flex-direction: column;
  background: var(--page-home-hero-bg);
  color: var(--page-home-text-light);
  padding: 2rem 1rem 1.5rem;
  gap: 1.5rem;
}

.page-home-chapter {
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 2px;
  color: var(--page-home-accent);
  display: block;
  margin-bottom: 0.5rem;
}

.page-home-hero-title {
  font-weight: 700;
  font-size: 2.5rem;
  line-height: 1.1;
  margin: 0 0 0.75rem;
  color: var(--page-home-text-light);
}

.page-home-hero-desc {
  font-size: 1rem;
  color: var(--page-home-neutral);
  margin: 0 0 1.25rem;
}

.page-home-hero-content .btn-cta {
  display: inline-block;
  background: var(--page-home-accent);
  color: #fff;
  padding: 0.75rem 1.5rem;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: var(--page-home-radius);
  transition: background 0.25s ease;
}

.page-home-hero-content .btn-cta:hover,
.page-home-hero-content .btn-cta:focus-visible {
  background: var(--page-home-accent-light);
  outline: 2px solid #fff;
}

.page-home-hero-visual {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.page-home-hero-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--page-home-radius);
}

.page-home-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-home-stat-card {
  flex: 1 1 calc(50% - 0.75rem);
  min-width: 120px;
  background: rgba(255, 255, 255, 0.08);
  padding: 0.75rem;
  border-radius: var(--page-home-radius);
  border-left: 3px solid var(--page-home-accent);
  transition: background 0.25s ease, transform 0.25s ease;
}

.page-home-stat-card:hover {
  background: rgba(255, 255, 255, 0.16);
  transform: translateY(-2px);
}

.page-home-stat-label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: var(--page-home-accent-light);
  margin-bottom: 0.25rem;
}

.page-home-stat-value {
  display: block;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--page-home-text-light);
}

/* 核心升级区 */
.page-home-updates {
  background: var(--page-home-card-bg);
  padding: 2rem 1rem;
}

.page-home-section-header {
  margin-bottom: 1.5rem;
}

.page-home-section-header .section-number {
  font-weight: 600;
  font-size: 0.875rem;
  letter-spacing: 2px;
  color: var(--page-home-accent);
  display: block;
  margin-bottom: 0.25rem;
}

.page-home-section-header .section-title {
  font-weight: 700;
  font-size: 1.75rem;
  margin: 0 0 0.5rem;
  color: var(--page-home-text-dark);
}

.page-home-section-header .section-subtitle {
  font-size: 0.875rem;
  color: var(--page-home-text-mid);
  margin: 0;
}

.page-home-update-list {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.page-home-update-item {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1.25rem;
  background: var(--page-home-neutral);
  border-radius: var(--page-home-radius);
  border-left: 4px solid var(--page-home-hero-bg);
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.page-home-update-item:hover {
  box-shadow: 0 4px 12px rgba(11, 29, 58, 0.12);
  transform: translateX(3px);
}

.page-home-update-item-accent {
  border-left-color: var(--page-home-accent);
  background: #fff;
  box-shadow: 0 2px 8px rgba(255, 107, 53, 0.1);
}

.page-home-update-icon {
  width: 100%;
  max-width: 100px;
  height: auto;
  object-fit: contain;
  border-radius: var(--page-home-radius);
}

.page-home-update-item-accent .page-home-update-icon {
  max-width: 100%;
}

.page-home-update-text {
  flex: 1;
}

.page-home-update-title {
  font-weight: 700;
  font-size: 1.125rem;
  margin: 0 0 0.375rem;
  color: var(--page-home-text-dark);
}

.page-home-update-desc {
  font-size: 0.875rem;
  color: var(--page-home-text-mid);
  margin: 0;
}

/* 排名趋势区 */
.page-home-trends {
  background: var(--page-home-hero-bg);
  padding: 2rem 1rem;
  color: var(--page-home-text-light);
}

.page-home-trends .page-home-section-header .section-title {
  color: var(--page-home-text-light);
}

.page-home-trends .page-home-section-header .section-subtitle {
  color: var(--page-home-accent-light);
}

.page-home-trends-scroll {
  position: relative;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.5rem 0;
}

.page-home-trends-chart {
  width: 100%;
  max-width: 600px;
  height: auto;
  object-fit: contain;
  border-radius: var(--page-home-radius);
  scroll-snap-align: center;
  background: rgba(255, 255, 255, 0.04);
  transition: transform 0.25s ease;
}

.page-home-trends-chart:hover {
  transform: scale(1.02);
}

.page-home-trends-hint {
  font-size: 0.75rem;
  color: var(--page-home-accent-light);
  white-space: nowrap;
  letter-spacing: 1px;
  font-weight: 600;
  padding-right: 0.5rem;
}

/* 即刻开始区 */
.page-home-cta {
  background: var(--page-home-card-bg);
  padding: 2rem 1rem;
  text-align: center;
}

.page-home-cta-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 1.5rem;
}

.page-home-cta-buttons .btn-cta {
  display: inline-block;
  background: var(--page-home-accent);
  color: #fff;
  padding: 0.75rem 2rem;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: var(--page-home-radius);
  transition: background 0.25s ease;
}

.page-home-cta-buttons .btn-cta:hover,
.page-home-cta-buttons .btn-cta:focus-visible {
  background: var(--page-home-accent-light);
  outline: 2px solid var(--page-home-hero-bg);
}

.page-home-cta-secondary {
  display: inline-block;
  background: transparent;
  color: var(--page-home-text-dark);
  padding: 0.75rem 2rem;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.875rem;
  border-radius: var(--page-home-radius);
  border: 2px solid var(--page-home-hero-bg);
  transition: background 0.25s ease, color 0.25s ease;
}

.page-home-cta-secondary:hover,
.page-home-cta-secondary:focus-visible {
  background: var(--page-home-hero-bg);
  color: #fff;
}

.page-home-cta-contact {
  font-size: 0.75rem;
  color: var(--page-home-text-mid);
  max-width: 400px;
  margin: 0 auto;
}

/* 桌面端：宽屏增强 - 媒体查询 */
@media (min-width: 768px) {
  .page-home-hero {
    flex-direction: row;
    align-items: center;
    padding: 3rem 2rem;
    gap: 2.5rem;
  }

  .page-home-hero-content {
    flex: 1 1 45%;
  }

  .page-home-hero-title {
    font-size: 3.5rem;
  }

  .page-home-hero-visual {
    flex: 1 1 55%;
    flex-direction: column;
  }

  .page-home-hero-stats {
    flex-wrap: nowrap;
  }

  .page-home-stat-card {
    flex: 1;
  }

  .page-home-updates {
    padding: 3rem 2rem;
  }

  .page-home-update-list {
    flex-direction: row;
    gap: 1.5rem;
  }

  .page-home-update-item {
    flex: 1;
    flex-direction: column;
    min-height: 220px;
  }

  .page-home-update-item-accent {
    flex: 1.2;
  }

  .page-home-trends {
    padding: 3rem 2rem;
  }

  .page-home-trends-scroll {
    justify-content: center;
  }

  .page-home-cta {
    padding: 3rem 2rem;
  }

  .page-home-cta-buttons {
    flex-direction: row;
    justify-content: center;
  }
}

/* 大屏约束 */
@media (min-width: 1200px) {
  .page-home-hero,
  .page-home-updates,
  .page-home-trends,
  .page-home-cta {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
  }

  .page-home-hero {
    max-width: 100%;
    padding-left: calc((100% - 1200px) / 2 + 2rem);
    padding-right: calc((100% - 1200px) / 2 + 2rem);
  }
}