.page-home {
  --page-grid-color: rgba(43, 26, 18, 0.08);
  --page-shadow-card: 4px 4px 0 rgba(43, 26, 18, 0.08);
  position: relative;
  background: var(--bg-paper);
  overflow: hidden;
}

.page-home__inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.page-home .breadcrumb-nav {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue);
  padding: 2rem 0 1rem;
  margin-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.page-home__index {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding: 1rem;
  margin-bottom: 2rem;
  background: var(--bg-cream);
  border: 1px solid var(--border);
  font-family: var(--mono);
  font-size: 0.8rem;
}

.page-home__index-label {
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.page-home__index .nav-link {
  color: var(--ink);
  text-decoration: none;
  padding: 0.25rem 0.5rem;
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-home__index .nav-link:hover,
.page-home__index .nav-link:focus-visible,
.page-home__index .nav-link.is-active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* Hero 区域 */
.page-home__hero {
  display: grid;
  gap: 2rem;
  padding: 3rem 0 4rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid var(--ink);
  background-image:
    linear-gradient(var(--page-grid-color) 1px, transparent 1px),
    linear-gradient(90deg, var(--page-grid-color) 1px, transparent 1px);
  background-size: 24px 24px;
}

.page-home .page-eyebrow {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.page-home .page-eyebrow::before {
  content: "";
  display: inline-block;
  width: 2rem;
  height: 1px;
  background: var(--accent);
}

.page-home .page-title {
  font-size: clamp(2.2rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  color: var(--ink);
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

.page-home .page-intro {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink);
  opacity: 0.85;
  max-width: 42ch;
}

.page-home__hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 2rem;
}

.page-home .btn {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 0.9rem;
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--ink);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.page-home .btn-primary {
  background: var(--accent);
  color: var(--bg-paper);
  box-shadow: 3px 3px 0 var(--ink);
}

.page-home .btn-outline {
  background: transparent;
  color: var(--ink);
  box-shadow: 3px 3px 0 var(--ink);
}

.page-home .btn:hover,
.page-home .btn:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--ink);
}

.page-home .btn-sm {
  padding: 0.4rem 0.9rem;
  font-size: 0.8rem;
  box-shadow: 2px 2px 0 var(--ink);
}

.page-home__hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 0;
  margin: 2rem 0 0;
}

.page-home .tag-label {
  background: var(--yellow);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.3rem 0.6rem;
  text-transform: uppercase;
  border: 1px solid var(--ink);
}

.page-home__hero-visual {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.page-home .image-frame {
  position: relative;
  display: block;
  background: var(--bg-cream);
  border: 1px solid var(--ink);
  box-shadow: var(--page-shadow-card);
  padding: 0.5rem;
}

.page-home .image-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--border);
}

.page-home .image-frame::after {
  content: "档案夹";
  position: absolute;
  top: 0;
  right: 0;
  background: var(--yellow);
  color: var(--ink);
  font-family: var(--mono);
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 0.25rem 0.75rem;
  border-bottom: 1px solid var(--ink);
  border-left: 1px solid var(--ink);
}

/* 坐标卡片 */
.page-home__coords {
  position: relative;
  border: 1px solid var(--border);
  background: var(--bg-cream);
  padding: 1rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--blue);
}

.page-home__chart {
  width: 100%;
  height: auto;
  color: var(--accent);
}

.page-home__coord-label {
  position: absolute;
  bottom: 0.5rem;
  right: 0.75rem;
  background: var(--ink);
  color: var(--bg-paper);
  padding: 0.2rem 0.5rem;
  font-size: 0.65rem;
  letter-spacing: 0.05em;
}

/* 数据流优势 */
.page-home__stats {
  padding: 2rem 0;
  margin-bottom: 2rem;
}

.page-home .section-marker {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--mono);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--blue);
  margin-bottom: 2rem;
}

.page-home .marker-index {
  background: var(--ink);
  color: var(--bg-paper);
  padding: 0.25rem 0.6rem;
  font-size: 0.75rem;
}

.page-home__stat-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 2rem;
}

.page-home .metric {
  background: var(--bg-cream);
  border: 1px solid var(--border);
  border-top: 4px solid var(--accent);
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  box-shadow: var(--page-shadow-card);
}

.page-home .metric-value {
  font-family: var(--mono);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1;
  color: var(--ink);
}

.page-home .metric-value + .metric-unit {
  font-family: var(--mono);
  font-size: 0.9rem;
  color: var(--blue);
  font-weight: 700;
}

.page-home .metric-label {
  font-size: 0.8rem;
  color: var(--ink);
  opacity: 0.7;
  margin-top: auto;
}

.page-home__stat-note {
  margin: 0;
  padding: 1.5rem 2rem;
  background: var(--blue);
  color: var(--bg-paper);
  font-size: 1.1rem;
  font-weight: 700;
  border-left: 6px solid var(--yellow);
  line-height: 1.6;
}

/* 收藏区域 */
.page-home__favorites {
  padding: 2rem 0;
  margin-bottom: 2rem;
  border-top: 1px solid var(--border);
}

.page-home__favorites-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-home__subtitle {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 900;
  color: var(--ink);
  line-height: 1.2;
  margin-bottom: 1.5rem;
}

.page-home__steps {
  list-style: none;
  padding: 0;
  margin: 0 0 2rem;
  display: grid;
  gap: 1rem;
}

.page-home__step {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  padding: 1rem;
  background: var(--bg-cream);
  border: 1px solid var(--border);
  transition: box-shadow 0.2s ease;
}

.page-home__step:hover {
  box-shadow: var(--page-shadow-card);
}

.page-home__step-num {
  flex: 0 0 2rem;
  width: 2rem;
  height: 2rem;
  background: var(--green);
  color: var(--bg-paper);
  font-family: var(--mono);
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.page-home__step strong {
  display: block;
  font-size: 1rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 0.25rem;
}

.page-home__step p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.5;
  color: var(--ink);
  opacity: 0.8;
}

/* V3 帮助中心 */
.page-home__v3 {
  padding: 2rem 0;
  margin-bottom: 2rem;
  border-top: 1px solid var(--border);
}

.page-home__v3-grid {
  display: grid;
  gap: 2rem;
  align-items: center;
}

.page-home__v3-copy p {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink);
  opacity: 0.85;
  margin-bottom: 1.5rem;
}

.page-home__v3-copy .btn {
  margin-right: 0.5rem;
}

/* 覆盖区域 */
.page-home__coverage {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
}

.page-home__coverage-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.page-home__coverage-card {
  background: var(--bg-cream);
  border: 1px solid var(--ink);
  padding: 1.5rem 1rem;
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.page-home__coverage-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--page-shadow-card);
}

.page-home__coverage-card .metric-value {
  font-family: var(--mono);
  font-size: 2rem;
  font-weight: 800;
  color: var(--blue);
}

.page-home__coverage-card .metric-label {
  font-size: 0.85rem;
  color: var(--ink);
  opacity: 0.7;
}

.page-home__coverage-note {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--ink);
  opacity: 0.8;
  padding-top: 1rem;
  border-top: 1px dashed var(--gray);
}

/* 背景纹理 */
.page-home__bg-texture {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 40%;
  max-width: 480px;
  opacity: 0.25;
  pointer-events: none;
  z-index: 1;
  border-left: 1px solid var(--border);
  border-top: 1px solid var(--border);
}

.page-home__bg-texture img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* 网格增强 */
.page-home__favorites,
.page-home__v3,
.page-home__coverage {
  position: relative;
  z-index: 2;
}

.page-home__stats {
  position: relative;
  z-index: 2;
}

/* 平板与桌面布局 */
@media (min-width: 768px) {
  .page-home__inner {
    padding: 0 2rem;
  }

  .page-home__hero {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    padding: 4rem 0 5rem;
  }

  .page-home__stat-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
  }

  .page-home__favorites-grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }

  .page-home__v3-grid {
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
  }

  .page-home__coverage-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
  }
}

@media (min-width: 1024px) {
  .page-home__hero-copy {
    padding-right: 2rem;
  }

  .page-home__hero-visual {
    padding-left: 1rem;
  }

  .page-home__favorites-grid {
    grid-template-columns: 3fr 2fr;
  }

  .page-home__v3-grid {
    grid-template-columns: 2fr 3fr;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home * {
    transition: none !important;
    scroll-behavior: auto !important;
  }
}