/* ===== 首页专属样式 (限定 .page-home) ===== */
.page-home {
  --hero-bg-overlay: rgba(10,37,64,0.45);
  --step-bg: var(--color-warm-white);
  --step-number-bg: var(--color-accent);
  --guide-border: var(--color-silver);
}

/* 框景首屏 */
.page-home .section-hero {
  padding-top: calc(var(--header-height) + 2rem);
  padding-bottom: 3rem;
}

.page-home .frame-hero {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-card);
  background: var(--color-primary);
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  /* 四角刻度装饰通过corner-mark实现，这里用clip-path制造框景效果 */
  clip-path: polygon(0% 0%, 100% 0%, 100% 100%, 0% 100%);
}

.page-home .hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-home .hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-home .hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: 3rem 2rem;
  color: var(--color-warm-white);
  max-width: 700px;
}

.page-home .hero-title {
  font-size: 2.5rem;
  font-weight: var(--heading-weight);
  letter-spacing: var(--letter-spacing-headings);
  margin-bottom: 0.5rem;
  line-height: 1.2;
}

.page-home .hero-subtitle {
  font-size: 1.125rem;
  margin-bottom: 2rem;
  color: var(--color-silver);
  line-height: var(--line-height-body);
}

.page-home .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
  align-items: center;
}

.page-home .version-selector {
  display: inline-flex;
  background: rgba(255,255,255,0.15);
  border-radius: var(--radius-pill);
  overflow: hidden;
}

.page-home .version-btn {
  padding: 0.6rem 1.5rem;
  border: none;
  background: transparent;
  color: var(--color-warm-white);
  font-family: var(--font-family);
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  transition: background var(--transition-base);
}

.page-home .version-btn.is-active {
  background: var(--color-accent);
  color: var(--color-warm-white);
}

.page-home .compare-link {
  color: var(--color-warm-white);
  border-color: var(--color-accent);
}

/* 四角刻度 */
.page-home .corner-mark {
  position: absolute;
  width: 40px;
  height: 40px;
  border: 3px solid var(--color-accent);
  z-index: 2;
  pointer-events: none;
}

.page-home .corner-mark--tl {
  top: 12px;
  left: 12px;
  border-right: none;
  border-bottom: none;
}

.page-home .corner-mark--tr {
  top: 12px;
  right: 12px;
  border-left: none;
  border-bottom: none;
}

.page-home .corner-mark--bl {
  bottom: 12px;
  left: 12px;
  border-right: none;
  border-top: none;
}

.page-home .corner-mark--br {
  bottom: 12px;
  right: 12px;
  border-left: none;
  border-top: none;
}

/* 最新更新公告 */
.page-home .section-updates {
  padding: 3rem 0;
  background: var(--color-warm-white);
}

.page-home .updates-list {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  margin-top: 2rem;
}

.page-home .update-card {
  overflow: hidden;
}

.page-home .update-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem;
  cursor: pointer;
  user-select: none;
}

.page-home .update-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-card);
  object-fit: cover;
  flex-shrink: 0;
}

.page-home .update-title {
  flex: 1;
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0;
  color: var(--color-text);
}

.page-home .update-toggle {
  width: 2rem;
  height: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-light);
  border-radius: 50%;
  color: var(--color-text);
  font-weight: 700;
  font-size: 1.25rem;
  transition: transform var(--transition-base);
}

.page-home [data-collapse].is-open .update-toggle {
  transform: rotate(45deg);
}

.page-home .update-body {
  padding: 0 1.25rem 1.25rem;
  display: none;
  color: var(--color-text-medium);
  line-height: var(--line-height-body);
}

.page-home [data-collapse].is-open .update-body {
  display: block;
}

/* 版本说明引导 */
.page-home .section-version-guide {
  padding: 3rem 0;
  background: var(--color-card-bg);
}

.page-home .guide-layout {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: center;
}

.page-home .guide-text {
  flex: 1 1 400px;
}

.page-home .guide-steps {
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
  counter-reset: step;
}

.page-home .guide-step {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0;
  border-bottom: 1px solid var(--guide-border);
  counter-increment: step;
}

.page-home .guide-step:last-child {
  border-bottom: none;
}

.page-home .step-number {
  width: 2.5rem;
  height: 2.5rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--step-number-bg);
  color: var(--color-warm-white);
  font-weight: 700;
  font-size: 1.125rem;
  border-radius: 50%;
  flex-shrink: 0;
}

.page-home .step-text {
  font-size: 1rem;
  color: var(--color-text);
}

.page-home .guide-image {
  flex: 1 1 400px;
}

.page-home .guide-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
}

/* 品牌价值简述 */
.page-home .section-brand-value {
  padding: 3rem 0;
  background: var(--color-primary);
  color: var(--color-warm-white);
}

.page-home .value-layout {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: center;
}

.page-home .value-image {
  flex: 1 1 300px;
  text-align: center;
}

.page-home .value-img {
  width: 100%;
  max-width: 300px;
  height: auto;
  border-radius: var(--radius-card);
}

.page-home .value-text {
  flex: 1 1 400px;
}

.page-home .value-desc {
  font-size: 1.125rem;
  line-height: var(--line-height-body);
  margin: 1.5rem 0;
  color: var(--color-silver);
}

.page-home .value-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.page-home .value-actions .btn-primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-warm-white);
}

.page-home .value-actions .btn-outline {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* 响应式 */
@media (max-width: 767px) {
  .page-home .hero-title {
    font-size: 1.75rem;
  }

  .page-home .hero-subtitle {
    font-size: 1rem;
  }

  .page-home .hero-actions {
    flex-direction: column;
  }

  .page-home .version-selector {
    width: 100%;
    justify-content: center;
  }

  .page-home .guide-layout,
  .page-home .value-layout {
    flex-direction: column;
  }

  .page-home .guide-image {
    order: -1;
  }

  .page-home .value-image {
    order: -1;
  }

  .page-home .update-icon {
    width: 48px;
    height: 48px;
  }

  .page-home .update-title {
    font-size: 1rem;
  }

  .page-home .frame-hero {
    min-height: 300px;
  }
}

@media (min-width: 768px) {
  .page-home .hero-title {
    font-size: 3.5rem;
  }
}