<style>
.page-home {
  position: relative;
  font-family: var(--font-body);
  background: var(--cream);
  color: var(--dark);
  line-height: 1.6;
  overflow-x: hidden;
}
.page-home img {
  max-width: 100%;
  height: auto;
}
.page-home h1,
.page-home h2,
.page-home h3 {
  font-family: var(--font-heading);
  line-height: 1.3;
}
.page-home .hero-section {
  position: relative;
  background:
    linear-gradient(rgba(139, 139, 122, 0.13) 1px, transparent 1px),
    linear-gradient(90deg, rgba(139, 139, 122, 0.13) 1px, transparent 1px),
    var(--cream);
  background-size: 32px 32px, 32px 32px, auto;
  padding: 2rem 1.25rem;
}
.page-home .hero-section::after {
  content: "坐标 30.5692° N / 104.0665° E · 图纸编号 SH-2024-01";
  position: absolute;
  right: 1rem;
  bottom: 0.75rem;
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--stone);
}
.page-home .hero-inner {
  max-width: var(--container);
  margin: 0 auto;
}
.page-home .hero-index {
  position: relative;
  background: var(--dark);
  color: var(--cream);
  padding: 2.25rem 1.5rem 2.5rem;
  box-shadow: 8px 8px 30px rgba(0, 0, 0, 0.16);
}
.page-home .hero-index-label {
  display: inline-block;
  background: var(--red);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 0.4em 0.9em;
  border-radius: 2px;
  text-transform: uppercase;
}
.page-home .hero-index h1 {
  font-size: 2.25rem;
  font-weight: 800;
  margin: 1.2rem 0 0.9rem;
  line-height: 1.2;
  color: var(--cream);
  border-bottom: 2px solid rgba(201, 160, 99, 0.55);
  padding-bottom: 0.9rem;
}
.page-home .hero-lead {
  font-size: 1rem;
  color: rgba(245, 241, 232, 0.82);
  margin: 0 0 1.5rem;
}
.page-home .index-list {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
}
.page-home .index-list li {
  border-bottom: 1px solid rgba(245, 241, 232, 0.14);
}
.page-home .index-list a {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.9rem 0;
  color: var(--cream);
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.page-home .index-list a:hover,
.page-home .index-list a:focus-visible {
  color: var(--gold);
  padding-left: 0.5rem;
  outline: none;
}
.page-home .index-no {
  flex: 0 0 auto;
  width: 1.8rem;
  height: 1.8rem;
  display: grid;
  place-items: center;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--gold);
  border: 1px solid rgba(201, 160, 99, 0.6);
  border-radius: 50%;
}
.page-home .hero-compare {
  margin: 1.75rem 0 0;
  padding: 0;
  position: relative;
}
.page-home .compare-frame {
  position: relative;
  background: var(--cream);
  border: 1px solid var(--gold);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.08);
  overflow: hidden;
  outline: none;
}
.page-home .compare-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, rgba(195, 39, 43, 0.18) 0%, transparent 28%, transparent 72%, rgba(195, 39, 43, 0.12) 100%);
  pointer-events: none;
}
.page-home .compare-frame img {
  display: block;
  width: 100%;
  height: auto;
}
.page-home .compare-tag {
  position: absolute;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 2;
  background: var(--red);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.45em 0.9em;
  border-radius: 2px;
  box-shadow: 0 4px 14px rgba(195, 39, 43, 0.4);
  opacity: 1;
  transform: none;
}
.page-home .compare-frame .caption {
  margin: 0;
}
.page-home .help-section,
.page-home .download-section {
  max-width: var(--container);
  margin: 0 auto;
  padding: 2.75rem 1.25rem;
}
.page-home .section-heading {
  margin-bottom: 1.5rem;
}
.page-home .section-desc {
  margin: 0.4rem 0 0;
  color: var(--stone);
  max-width: 42rem;
}
.page-home .help-categories {
  display: grid;
  gap: 0.85rem;
  margin-bottom: 1.5rem;
}
.page-home .help-card {
  --card-accent: var(--gold);
  position: relative;
  display: grid;
  grid-template-columns: 2.6rem 1fr;
  gap: 0.85rem;
  align-items: center;
  padding: 1.15rem 1.25rem;
  background: #fff;
  border: 1px solid rgba(139, 139, 122, 0.28);
  border-left: 4px solid var(--card-accent);
  border-radius: 2px;
  text-decoration: none;
  color: var(--dark);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.page-home .help-card:nth-child(1) { --card-accent: var(--gold); }
.page-home .help-card:nth-child(2) { --card-accent: var(--clay); }
.page-home .help-card:nth-child(3) { --card-accent: var(--moss); }
.page-home .help-card:nth-child(4) { --card-accent: var(--red); }
.page-home .help-card:hover,
.page-home .help-card:focus-visible {
  transform: translateX(4px);
  border-color: var(--card-accent);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.08);
  outline: none;
}
.page-home .help-card-idx {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--card-accent);
}
.page-home .help-card-body {
  display: flex;
  flex-direction: column;
  gap: 0.15rem;
}
.page-home .help-card-body strong {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
}
.page-home .help-card-body em {
  font-style: normal;
  font-size: 0.85rem;
  color: var(--stone);
}
.page-home .help-bottom {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-start;
}
.page-home .help-figure {
  margin: 0;
  width: 100%;
  background: var(--dark);
  border: 1px solid var(--dark);
  padding: 0.5rem;
}
.page-home .help-figure img {
  display: block;
  width: 100%;
  height: auto;
}
.page-home .alpha-note {
  font-size: 0.875rem;
  color: var(--stone);
  margin: 0;
  padding-left: 0.5rem;
  border-left: 3px solid var(--gold);
}
.page-home .download-section {
  position: relative;
}
.page-home .download-section::before {
  content: "每周三更新";
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  background: var(--red);
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.4em 0.8em;
  border-radius: 2px;
  transform: rotate(1deg);
  box-shadow: 0 4px 12px rgba(195, 39, 43, 0.3);
}
.page-home .timeline-wrap {
  margin: 1rem 0 1.5rem;
}
.page-home .timeline-list {
  list-style: none;
  margin: 0 0 1.5rem;
  padding: 0;
}
.page-home .timeline-item {
  position: relative;
  padding: 0 0 1.1rem 1.65rem;
  border-left: 1px solid var(--gold);
}
.page-home .timeline-item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 0.35rem;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--red);
  border: 2px solid var(--gold);
  box-sizing: border-box;
}
.page-home .timeline-item summary {
  display: flex;
  align-items: baseline;
  gap: 0.9rem;
  cursor: pointer;
  list-style: none;
  transition: color 0.2s ease;
}
.page-home .timeline-item summary::-webkit-details-marker {
  display: none;
}
.page-home .timeline-item summary:hover {
  color: var(--red);
}
.page-home .timeline-year {
  font-family: var(--font-heading);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--red);
  min-width: 3.4rem;
}
.page-home .timeline-title {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
}
.page-home .timeline-detail {
  margin-top: 0.6rem;
  font-size: 0.9rem;
  color: var(--stone);
  background: #fff;
  border: 1px solid rgba(139, 139, 122, 0.2);
  padding: 0.75rem 0.9rem;
  border-radius: 2px;
}
.page-home .timeline-detail p {
  margin: 0;
}
.page-home .timeline-figure {
  margin: 0;
  padding: 0;
}
.page-home .timeline-figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--gold);
}
.page-home .cert-list {
  list-style: none;
  margin: 1.25rem 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.page-home .cert-list li {
  font-size: 0.85rem;
  color: var(--dark);
  background: rgba(201, 160, 99, 0.18);
  border: 1px solid rgba(201, 160, 99, 0.4);
  padding: 0.35em 0.8em;
  border-radius: 2px;
  letter-spacing: 0.02em;
}
.page-home .member-fab {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 80;
  display: flex;
  align-items: center;
  gap: 0.6rem;
  background: linear-gradient(135deg, var(--dark), var(--ink));
  color: var(--cream);
  text-decoration: none;
  padding: 0.5rem 1rem 0.5rem 0.5rem;
  border-radius: 999px;
  border: 1px solid var(--gold);
  font-size: 0.875rem;
  font-weight: 600;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.32);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}
.page-home .member-fab:hover,
.page-home .member-fab:focus-visible {
  transform: scale(1.06);
  border-color: var(--red);
  box-shadow: 0 10px 30px rgba(195, 39, 43, 0.4);
  outline: none;
}
.page-home .member-fab-img {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid rgba(201, 160, 99, 0.5);
}
.page-home .member-fab-text {
  white-space: nowrap;
}
@media (max-width: 899px) {
  .page-home .help-section,
  .page-home .download-section {
    padding-left: 1rem;
    padding-right: 1rem;
  }
}
@media (min-width: 900px) {
  .page-home .hero-section {
    padding: 3.5rem 1.5rem 4rem;
  }
  .page-home .hero-inner {
    display: grid;
    grid-template-columns: minmax(340px, 420px) 1fr;
    align-items: stretch;
    gap: 0;
  }
  .page-home .hero-index {
    z-index: 2;
    padding: 4rem 3.5rem 4rem 2.5rem;
    clip-path: polygon(0 0, 100% 0, 88% 100%, 0 100%);
    margin-right: -2rem;
  }
  .page-home .hero-index::after {
    content: "";
    position: absolute;
    right: 0;
    bottom: 0;
    width: 6px;
    height: 62%;
    background: var(--gold);
    transform: rotate(-8deg);
    transform-origin: right bottom;
    opacity: 0.8;
  }
  .page-home .hero-index h1 {
    font-size: 3.5rem;
  }
  .page-home .hero-lead {
    font-size: 1.1rem;
    max-width: 32rem;
  }
  .page-home .hero-compare {
    margin: 2rem 0 0;
  }
  .page-home .compare-frame {
    box-shadow: 0 20px 48px rgba(0, 0, 0, 0.14);
  }
  .page-home .compare-tag {
    top: 1rem;
    left: 1rem;
    opacity: 0;
    transform: translateY(-10px);
    transition: opacity 0.25s ease, transform 0.25s ease;
  }
  .page-home .compare-frame:hover .compare-tag,
  .page-home .compare-frame:focus-visible .compare-tag {
    opacity: 1;
    transform: translateY(0);
  }
  .page-home .help-section,
  .page-home .download-section {
    padding: 4.25rem 1.5rem;
  }
  .page-home .help-categories {
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
  }
  .page-home .help-bottom {
    flex-direction: row;
    align-items: center;
    gap: 2rem;
  }
  .page-home .help-figure {
    flex: 0 0 60%;
    max-width: 66%;
    padding: 0.75rem;
  }
  .page-home .alpha-note {
    max-width: 20rem;
  }
  .page-home .timeline-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.75rem;
    margin-bottom: 2.25rem;
  }
  .page-home .timeline-item {
    border-left: none;
    border-top: 1px solid var(--gold);
    padding: 1.4rem 0.4rem 0;
  }
  .page-home .timeline-item::before {
    left: 0.4rem;
    top: -7px;
  }
  .page-home .timeline-item summary {
    align-items: center;
  }
  .page-home .cert-list {
    gap: 0.8rem;
  }
}
</style>
