.page-home {
  --home-line: #1B4566;
  --home-panel: rgba(16, 42, 68, 0.82);
  --home-soft: #A9C0D4;
  --home-paper-ink: #0A1B2E;
  --home-paper-sub: #41627F;
  --home-link-on-paper: #00778A;
  background: var(--navy-950);
  color: var(--paper);
  overflow-x: clip;
}

.page-home a:focus-visible,
.page-home summary:focus-visible {
  outline: 2px solid var(--cyan-500);
  outline-offset: 2px;
}

/* ---------- 首屏 ---------- */
.home-hero {
  position: relative;
  padding: clamp(2rem, 6vw, 4rem) 0 clamp(2.25rem, 5vw, 3.75rem);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(0, 229, 255, 0.14), transparent 62%),
    radial-gradient(90% 70% at 6% 100%, rgba(255, 176, 32, 0.09), transparent 66%),
    var(--navy-950);
  border-bottom: 1px solid var(--home-line);
}

.home-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(121, 242, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(121, 242, 255, 0.055) 1px, transparent 1px);
  background-size: 52px 52px;
  -webkit-mask-image: radial-gradient(72% 72% at 50% 38%, #000 38%, transparent 100%);
  mask-image: radial-gradient(72% 72% at 50% 38%, #000 38%, transparent 100%);
  pointer-events: none;
}

.home-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.75rem, 4vw, 3rem);
  align-items: center;
}

.hero-kicker {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-wrap: wrap;
  margin: 0 0 1.25rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--cyan-300);
}

.hero-live {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 0 4px rgba(46, 230, 168, 0.16);
}

.home-hero h1 {
  margin: 0 0 1.1rem;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(2.25rem, 7.4vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -0.035em;
  color: var(--paper);
}

.home-hero h1 span {
  color: var(--cyan-500);
}

.hero-lead {
  max-width: 46ch;
  margin: 0 0 1.75rem;
  font-size: clamp(1rem, 1.6vw, 1.1rem);
  line-height: 1.85;
  color: var(--home-soft);
}

.hero-actions {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 0.75rem;
}

.hero-actions .cta {
  width: 100%;
  text-align: center;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 1rem 1.25rem;
  margin: 2.25rem 0 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--home-line);
}

.hero-stats dt {
  margin: 0 0 0.35rem;
  font-size: 0.78rem;
  letter-spacing: 0.03em;
  color: var(--home-soft);
}

.hero-stats dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 1.65rem;
  font-weight: 700;
  line-height: 1;
  color: var(--amber-500);
}

.hero-visual {
  position: relative;
}

.hero-frame {
  position: relative;
  padding: 0.5rem;
  border: 1px solid var(--home-line);
  border-radius: var(--radius);
  background: linear-gradient(155deg, rgba(16, 42, 68, 0.95), rgba(5, 13, 26, 0.94));
  box-shadow:
    0 0 0 1px rgba(0, 229, 255, 0.16),
    0 30px 70px -32px rgba(0, 229, 255, 0.55);
}

.hero-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: 2px;
  object-fit: cover;
}

.hero-index {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.5rem;
}

.hero-index li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.55rem 0.8rem;
  border: 1px solid var(--home-line);
  border-left: 3px solid var(--amber-500);
  border-radius: 2px;
  background: rgba(10, 27, 46, 0.94);
  font-size: 0.85rem;
  color: var(--paper);
}

.hero-index .idx {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--amber-500);
}

/* ---------- 页内导航 ---------- */
.home-toc {
  background: var(--navy-900);
  border-bottom: 1px solid var(--home-line);
}

.home-toc-list {
  list-style: none;
  margin: 0;
  padding: 0.6rem 0;
  display: flex;
  gap: 0.25rem;
  overflow-x: auto;
  scrollbar-width: thin;
}

.home-toc-list li {
  flex: 0 0 auto;
}

.home-toc-list a {
  display: block;
  padding: 0.45rem 0.8rem;
  border: 1px solid transparent;
  border-radius: 2px;
  font-size: 0.85rem;
  color: var(--home-soft);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.home-toc-list a:hover,
.home-toc-list a:focus-visible {
  color: var(--cyan-300);
  border-color: var(--home-line);
}

.home-toc-list a[aria-current]:not([aria-current="false"]) {
  color: var(--amber-500);
  border-color: rgba(255, 176, 32, 0.6);
}

/* ---------- 通用区块 ---------- */
.home-section {
  padding: clamp(2.5rem, 6vw, 4.5rem) 0;
}

.home-h2 {
  margin: 0 0 0.85rem;
  font-family: var(--font-heading);
  font-size: clamp(1.6rem, 3.4vw, 2.35rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.025em;
  color: inherit;
}

.sec-head {
  margin-bottom: clamp(1.5rem, 3vw, 2.25rem);
}

.sec-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--amber-500);
}

.sec-eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: currentColor;
}

.sec-lead {
  max-width: 58ch;
  margin: 0;
  font-size: 0.98rem;
  line-height: 1.85;
  color: var(--home-soft);
}

/* ---------- 三步 ---------- */
.steps-figure {
  margin: 0 0 clamp(1.5rem, 3vw, 2.25rem);
  border: 1px solid var(--home-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--navy-900);
}

.steps-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.steps-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.step-card {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding: 1.5rem 1.25rem 1.25rem;
  border: 1px solid var(--home-line);
  border-top: 2px solid var(--amber-500);
  border-radius: var(--radius);
  background: linear-gradient(175deg, var(--home-panel), rgba(10, 27, 46, 0.92));
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.step-card:hover,
.step-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--cyan-500);
  box-shadow: 0 20px 44px -26px rgba(0, 229, 255, 0.75);
}

.step-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(2.1rem, 5vw, 2.9rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--amber-500);
  text-shadow: 0 0 26px rgba(255, 176, 32, 0.35);
}

.step-card h3 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 1.06rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.step-card p {
  margin: 0;
  font-size: 0.91rem;
  line-height: 1.82;
  color: var(--home-soft);
}

.step-card .step-out {
  margin-top: auto;
  padding-top: 0.85rem;
  border-top: 1px dashed var(--home-line);
  font-family: var(--font-mono);
  font-size: 0.79rem;
  color: var(--cyan-300);
}

.step-card .step-hint {
  font-size: 0.78rem;
  color: var(--home-soft);
  opacity: 0.62;
  transition: opacity 0.25s var(--ease), color 0.25s var(--ease);
}

.step-card:hover .step-hint,
.step-card:focus-within .step-hint {
  opacity: 1;
  color: var(--amber-300);
}

/* ---------- 入口地图（纸白层） ---------- */
.home-map {
  background: var(--paper);
  color: var(--home-paper-ink);
  border-top: 1px solid var(--haze);
  border-bottom: 1px solid var(--haze);
}

.home-map .sec-eyebrow {
  color: #9C5D00;
}

.home-map .sec-lead {
  color: var(--home-paper-sub);
}

.map-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.map-card {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1.35rem 1.25rem;
  border: 2px solid var(--haze);
  border-radius: var(--radius);
  background: #FFFFFF;
  box-shadow: 5px 5px 0 rgba(215, 230, 242, 0.85);
  color: inherit;
  text-decoration: none;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}

.map-card:hover,
.map-card:focus-visible {
  transform: translate(-2px, -2px);
  border-color: var(--cyan-500);
  box-shadow: 8px 8px 0 rgba(0, 229, 255, 0.26);
}

.map-tag {
  align-self: flex-start;
  padding: 0.18rem 0.5rem;
  border: 1px solid var(--home-link-on-paper);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.71rem;
  letter-spacing: 0.08em;
  color: var(--home-link-on-paper);
}

.map-title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 1.12rem;
  font-weight: 700;
  letter-spacing: -0.012em;
  color: var(--home-paper-ink);
}

.map-desc {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
  color: var(--home-paper-sub);
}

.map-go {
  margin-top: auto;
  padding-top: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.79rem;
  color: var(--home-link-on-paper);
}

.map-media {
  order: -1;
  overflow: hidden;
  background: var(--navy-900);
}

.map-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 反馈摘要 ---------- */
.fb-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  border: 1px solid var(--home-line);
  border-radius: var(--radius);
  background: var(--home-line);
  overflow: hidden;
}

.fb-item {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.35rem 1.25rem;
  background: var(--navy-900);
}

.fb-key {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  margin: 0;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
}

.fb-mark {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--amber-500);
}

.fb-item p:not(.fb-key) {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--home-soft);
}

.fb-more {
  margin: 1.5rem 0 0;
}

.fb-more a {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  color: var(--cyan-500);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.4);
  padding-bottom: 2px;
}

.fb-more a:hover,
.fb-more a:focus-visible {
  color: var(--cyan-300);
  border-bottom-color: var(--cyan-300);
}

/* ---------- 覆盖场景 ---------- */
.coverage-figure {
  margin: 0 0 clamp(1.5rem, 3vw, 2rem);
  border: 1px solid var(--home-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--navy-900);
}

.coverage-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.cover-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.cover-card {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: 1.35rem 1.25rem;
  border: 1px solid var(--home-line);
  border-left: 3px solid var(--cyan-500);
  border-radius: var(--radius);
  background: rgba(10, 27, 46, 0.78);
}

.cover-card h3 {
  margin: 0;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--paper);
}

.cover-card p {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.82;
  color: var(--home-soft);
}

.cover-card a {
  align-self: flex-start;
  margin-top: 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.79rem;
  color: var(--cyan-500);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.4);
  padding-bottom: 2px;
}

.cover-card a:hover,
.cover-card a:focus-visible {
  color: var(--cyan-300);
  border-bottom-color: var(--cyan-300);
}

/* ---------- 问答 ---------- */
.qa-list {
  display: grid;
  gap: 0.6rem;
  max-width: 84ch;
}

.qa-item {
  border: 1px solid var(--home-line);
  border-radius: var(--radius);
  background: var(--navy-900);
  overflow: hidden;
}

.qa-item summary {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.15rem;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
}

.qa-item summary::-webkit-details-marker {
  display: none;
}

.qa-item summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  line-height: 1;
  color: var(--amber-500);
}

.qa-item[open] summary::after {
  content: "\2212";
}

.qa-item[open] summary {
  border-bottom: 1px solid var(--home-line);
}

.qa-body {
  padding: 0.95rem 1.15rem 1.15rem;
}

.qa-body p {
  margin: 0;
  max-width: 64ch;
  font-size: 0.9rem;
  line-height: 1.85;
  color: var(--home-soft);
}

/* ---------- 收尾行动条 ---------- */
.home-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.25rem 2rem;
  margin-top: clamp(2rem, 5vw, 3rem);
  padding: clamp(1.5rem, 4vw, 2.4rem);
  border: 1px solid var(--home-line);
  border-left: 4px solid var(--amber-500);
  border-radius: var(--radius);
  background: linear-gradient(120deg, var(--home-panel), rgba(5, 13, 26, 0.92));
}

.home-cta-copy {
  flex: 1 1 320px;
  min-width: 0;
}

.home-cta-copy .home-h2 {
  font-size: clamp(1.3rem, 2.6vw, 1.7rem);
  margin-bottom: 0.6rem;
}

.home-cta-copy p {
  margin: 0;
  max-width: 52ch;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--home-soft);
}

.home-cta .cta {
  flex: 0 0 auto;
}

/* ---------- 响应式 ---------- */
@media (min-width: 560px) {
  .hero-actions {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .hero-actions .cta {
    width: auto;
  }
}

@media (min-width: 760px) {
  .steps-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
  }

  .map-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 1.25rem;
  }

  .map-card--lead {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    padding: 0;
    gap: 0;
  }

  .map-card--lead .map-lead-copy {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
    padding: 1.6rem;
  }

  .map-card--lead .map-media {
    order: 0;
    border-left: 2px solid var(--haze);
  }

  .map-card--lead .map-media img {
    height: 100%;
    min-height: 220px;
  }

  .fb-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .cover-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
  }
}

@media (min-width: 960px) {
  .home-hero-inner {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

  .hero-index {
    position: absolute;
    right: 0;
    bottom: 1.25rem;
    width: min(232px, 82%);
    margin: 0;
  }

  .hero-index li {
    background: rgba(10, 27, 46, 0.96);
    -webkit-backdrop-filter: blur(6px);
    backdrop-filter: blur(6px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .step-card,
  .page-home .map-card,
  .page-home .step-hint {
    transition: none;
  }

  .page-home .step-card:hover,
  .page-home .step-card:focus-within,
  .page-home .map-card:hover,
  .page-home .map-card:focus-visible {
    transform: none;
  }
}