.page-home {
  --home-gutter: clamp(1rem, 2vw, 1.5rem);
  --home-title-size: clamp(2.2rem, 5.2vw, 4.4rem);
  --home-radius: 0;
  background: var(--color-ink);
  color: var(--color-paper);
}

.page-home a:focus-visible {
  outline: 2px solid var(--color-yellow);
  outline-offset: 3px;
}

/* ===== 首屏：目录地图 ===== */
.page-home .home-map {
  position: relative;
  overflow: hidden;
  background: linear-gradient(120deg, var(--color-ink) 0%, #0E2438 58%, var(--color-crimson) 175%);
  color: var(--color-paper);
}

.page-home .home-map__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.34;
  pointer-events: none;
}

.page-home .home-map__frame {
  position: relative;
  z-index: 2;
  padding-top: 1.25rem;
  padding-bottom: 3.5rem;
}

.page-home .home-map .breadcrumb {
  color: var(--color-silver);
}

.page-home .home-map .breadcrumb a {
  color: var(--color-silver);
}

.page-home .home-map__top {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: start;
  margin-top: 2.5rem;
}

.page-home .home-map__intro {
  order: 0;
}

.page-home .home-map__circuit {
  order: 1;
  border: 1px solid var(--color-line);
  background: rgba(11, 27, 43, 0.45);
  padding: 0.875rem;
}

.page-home .home-map__circuit svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-home .home-map__eyebrow {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-yellow);
}

.page-home .home-map__title {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-style: italic;
  font-size: var(--home-title-size);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--color-paper);
}

.page-home .home-map__lead {
  margin: 0;
  max-width: 46rem;
  color: #D7DDE4;
  font-size: 1rem;
  line-height: 1.9;
}

.page-home .home-map__status {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-line);
}

.page-home .home-map__status-text {
  color: var(--color-silver);
  font-size: 0.875rem;
}

/* ===== 首屏：四列章节预览 ===== */
.page-home .chapter-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: 1.5rem;
}

@media (min-width: 640px) {
  .page-home .chapter-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1080px) {
  .page-home .chapter-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.page-home .chapter-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  min-height: 12rem;
  padding: 1.25rem 1.25rem 1.375rem;
  overflow: hidden;
  background: var(--color-paper);
  color: var(--color-ink);
  border: 1px solid var(--color-line);
  text-decoration: none;
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-home .chapter-card:hover {
  border-color: var(--color-yellow);
  transform: translateY(-4px);
}

.page-home .chapter-card__tag {
  font-family: var(--font-display);
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  color: var(--color-mist);
}

.page-home .chapter-card__title {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.4rem;
  line-height: 1.2;
}

.page-home .chapter-card__desc {
  margin: 0;
  color: var(--color-mist);
  font-size: 0.875rem;
  line-height: 1.6;
}

.page-home .chapter-card__arrow {
  margin-top: auto;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-yellow);
}

.page-home .chapter-card__scan {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.page-home .chapter-card__scan::before {
  content: "";
  position: absolute;
  top: -10%;
  left: -30%;
  width: 28%;
  height: 120%;
  background: linear-gradient(100deg, rgba(215, 255, 62, 0) 0%, rgba(215, 255, 62, 0.55) 45%, rgba(215, 255, 62, 0) 100%);
  transform: skewX(-18deg) translateX(-120%);
  transition: transform 0.7s ease;
}

.page-home .chapter-card:hover .chapter-card__scan::before {
  transform: skewX(-18deg) translateX(380%);
}

@media (prefers-reduced-motion: reduce) {
  .page-home .chapter-card__scan::before {
    display: none;
  }
}

/* ===== 大字号锚点索引 ===== */
.page-home .home-index {
  padding: 2.5rem 0 3rem;
  background: rgba(11, 27, 43, 0.72);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}

.page-home .home-index__eyebrow {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-yellow);
}

.page-home .quick-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.25rem 3rem;
}

@media (min-width: 860px) {
  .page-home .quick-list {
    grid-template-columns: 1fr 1fr;
  }

  .page-home .quick-link:nth-child(2) {
    transform: translateX(2.5rem);
  }

  .page-home .quick-link:nth-child(3) {
    transform: translateX(1.5rem);
  }

  .page-home .quick-link:nth-child(4) {
    transform: translateX(3.5rem);
  }
}

.page-home .quick-link {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  padding: 0.875rem 0;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-paper);
  text-decoration: none;
  transition: color 0.25s ease, border-color 0.25s ease, padding-left 0.25s ease;
}

.page-home .quick-link:hover {
  color: var(--color-yellow);
  border-bottom-color: var(--color-yellow);
  padding-left: 0.75rem;
}

.page-home .quick-link__num {
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--color-yellow);
}

.page-home .quick-link__text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 4.5vw, 4rem);
  line-height: 1;
  letter-spacing: 0.02em;
}

.page-home .quick-link__go {
  margin-left: auto;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--color-silver);
}

/* ===== 章节通用 ===== */
.page-home .home-section {
  padding: 4rem 0;
  scroll-margin-top: 4.5rem;
}

.page-home .home-section__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
}

@media (min-width: 960px) {
  .page-home .home-section__grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 3.5rem;
  }

  .page-home .home-section__grid--reverse > .home-section__content {
    order: 2;
  }

  .page-home .home-section__grid--reverse > .home-section__media,
  .page-home .home-section__grid--reverse > .home-section__panel {
    order: 1;
  }
}

.page-home .home-section__kicker {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  letter-spacing: 0.18em;
  color: var(--color-yellow);
}

.page-home .home-section h2 {
  margin: 0 0 1.25rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-style: italic;
  font-size: clamp(1.9rem, 4.5vw, 3.4rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.page-home .home-section__lead {
  margin: 0 0 1.5rem;
  max-width: 42rem;
  line-height: 1.85;
}

.page-home .home-section__list {
  display: grid;
  gap: 0.75rem;
  margin: 0 0 1.75rem;
  padding: 0;
  list-style: none;
}

.page-home .home-section__list li {
  position: relative;
  padding-left: 1.5rem;
  font-size: 0.9375rem;
  line-height: 1.6;
}

.page-home .home-section__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5rem;
  width: 0.75rem;
  height: 0.75rem;
  background: var(--color-yellow);
  clip-path: polygon(0 0, 100% 0, 100% 100%);
}

.page-home .home-section__media {
  margin: 0;
  border: 1px solid var(--color-line);
  background: var(--color-mist);
}

.page-home .home-section__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-home .home-section__media figcaption {
  padding: 0.75rem 1rem;
  border-top: 1px solid var(--color-line);
  font-size: 0.8125rem;
  color: var(--color-silver);
}

/* ===== 深色章节 ===== */
.page-home .home-section--dark {
  background: var(--color-ink);
  color: var(--color-paper);
}

.page-home .home-section--dark .home-section__lead {
  color: #D7DDE4;
}

.page-home .home-section--dark .home-section__list {
  color: #D7DDE4;
}

.page-home .home-section--dark .home-section__list li::before {
  background: var(--color-yellow);
}

.page-home .home-section--dark .home-section__panel {
  background: rgba(58, 65, 74, 0.28);
}

.page-home .home-section--dark .home-section__column-list li {
  color: #D7DDE4;
}

/* ===== 暖纸色章节 ===== */
.page-home .home-section--paper {
  background: var(--color-paper);
  color: var(--color-ink);
}

.page-home .home-section--paper .home-section__kicker {
  color: var(--color-red);
}

.page-home .home-section--paper .home-section__lead {
  color: var(--color-mist);
}

.page-home .home-section--paper .home-section__list {
  color: var(--color-mist);
}

.page-home .home-section--paper .home-section__list li::before {
  background: var(--color-ink);
}

.page-home .home-section--paper .home-section__media {
  background: var(--color-ink);
}

.page-home .home-section--paper .home-section__panel {
  background: rgba(11, 27, 43, 0.04);
}

/* ===== 帮助中心栏目面板 ===== */
.page-home .home-section__panel {
  border: 1px solid var(--color-line);
  padding: 1.5rem;
}

.page-home .home-section__panel-label {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  color: var(--color-yellow);
}

.page-home .home-section__column-list {
  display: grid;
  gap: 0.5rem;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: help-col;
}

.page-home .home-section__column-list li {
  counter-increment: help-col;
  display: flex;
  gap: 0.75rem;
  font-size: 0.9375rem;
  line-height: 1.5;
}

.page-home .home-section__column-list li::before {
  content: counter(help-col, decimal-leading-zero);
  font-family: var(--font-display);
  color: var(--color-yellow);
}

.page-home .home-section--paper .home-section__column-list {
  color: var(--color-mist);
}

/* ===== 首页收尾路径 ===== */
.page-home .home-tail {
  padding: 4rem 0 3rem;
  background: var(--color-ink);
  color: var(--color-paper);
}

.page-home .home-tail__eyebrow {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-yellow);
}

.page-home .home-tail__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-style: italic;
  font-size: clamp(1.8rem, 4vw, 3rem);
  line-height: 1.2;
}

.page-home .home-tail__grid {
  display: grid;
  gap: 1rem;
  margin-top: 1.5rem;
}

@media (min-width: 720px) {
  .page-home .home-tail__grid {
    grid-template-columns: 1fr 1fr;
  }
}

.page-home .home-tail__card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: rgba(244, 241, 232, 0.06);
  border: 1px solid var(--color-line);
  color: var(--color-paper);
  text-decoration: none;
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.page-home .home-tail__card:hover {
  background: var(--color-paper);
  color: var(--color-ink);
  border-color: var(--color-yellow);
  transform: translateX(4px);
}

.page-home .home-tail__num {
  font-family: var(--font-display);
  font-size: 1.125rem;
  color: var(--color-yellow);
}

.page-home .home-tail__card:hover .home-tail__num {
  color: var(--color-red);
}

.page-home .home-tail__text {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.125rem;
  line-height: 1.3;
}

.page-home .home-tail__note {
  margin: 2rem 0 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--color-line);
  color: var(--color-silver);
  font-size: 0.875rem;
}