.page-home {
  background: var(--paper-50);
  overflow-x: hidden;
}

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

/* ========== Hero 首屏入口区 ========== */
.page-home .home-hero {
  position: relative;
  padding: var(--sp-4) 0 0;
  background-color: var(--paper-50);
  background-image:
    linear-gradient(rgba(10, 26, 63, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 26, 63, 0.045) 1px, transparent 1px);
  background-size: 28px 28px;
  border-bottom: 3px solid var(--navy-900);
}

.page-home .hero-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-5);
  margin-top: var(--sp-4);
}

.page-home .hero-copy {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.page-home .hero-copy h1 {
  font-size: clamp(2rem, 6vw, 3.25rem);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--ink-900);
  margin: 0;
}

.page-home .hero-lead {
  font-size: 1.0625rem;
  line-height: 1.7;
  color: var(--ink-600);
  max-width: 36em;
  margin: 0;
}

.page-home .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-top: var(--sp-2);
}

.page-home .door-frame {
  position: relative;
  display: flex;
  flex-direction: column;
  background: var(--navy-900);
  border: 3px solid var(--navy-900);
  box-shadow: var(--shadow-hard);
  padding: var(--sp-4);
}

.page-home .door-frame::before {
  content: "";
  position: absolute;
  top: 8px;
  left: 8px;
  width: 26px;
  height: 26px;
  border-top: 3px solid var(--gold-500);
  border-left: 3px solid var(--gold-500);
  z-index: 2;
}

.page-home .door-frame::after {
  content: "";
  position: absolute;
  right: 8px;
  bottom: 8px;
  width: 26px;
  height: 26px;
  border-right: 3px solid var(--gold-500);
  border-bottom: 3px solid var(--gold-500);
  z-index: 2;
}

.page-home .door-frame-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(212, 175, 55, 0.6);
  padding-bottom: var(--sp-3);
  margin-bottom: var(--sp-3);
}

.page-home .door-title {
  color: var(--gold-300);
  font-size: 0.9375rem;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.page-home .door-code {
  color: var(--gold-500);
  font-size: 0.875rem;
}

.page-home .v3-zone {
  background: var(--paper-50);
  border: 2px solid var(--gold-500);
  padding: var(--sp-4);
  margin-bottom: var(--sp-4);
}

.page-home .collect-btn {
  display: block;
  width: 100%;
  box-sizing: border-box;
  background: var(--orange-500);
  color: #fff;
  border: 2px solid var(--navy-900);
  box-shadow: 4px 4px 0 rgba(10, 26, 63, 0.25);
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  text-align: center;
  text-decoration: none;
  padding: var(--sp-3) var(--sp-4);
  margin-top: var(--sp-3);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-home .collect-btn:hover,
.page-home .collect-btn:focus {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(10, 26, 63, 0.3);
}

.page-home .collect-btn:active {
  transform: translate(0, 2px);
  box-shadow: 2px 2px 0 rgba(10, 26, 63, 0.3);
}

.page-home .collect-hint {
  margin: var(--sp-3) 0 0;
  font-size: 0.8125rem;
  color: var(--ink-600);
  letter-spacing: 0.04em;
}

.page-home .topbar-zone {
  display: flex;
  flex-direction: column;
  gap: var(--sp-2);
  border: 1px solid rgba(212, 175, 55, 0.5);
  padding: var(--sp-3);
  margin-bottom: var(--sp-4);
}

.page-home .topbar-link {
  color: var(--paper-50);
  font-size: 1rem;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease);
}

.page-home .topbar-link:hover {
  border-bottom-color: var(--gold-500);
}

.page-home .hero-screenshot {
  display: block;
  width: 100%;
  height: auto;
  border: 2px solid var(--navy-700);
}

.page-home .chapter-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3);
  margin-top: var(--sp-5);
  padding: var(--sp-5) 0 var(--sp-6);
  border-top: 1px solid rgba(10, 26, 63, 0.14);
}

.page-home .chapter-link {
  display: flex;
  flex-direction: column;
  gap: var(--sp-1);
  background: var(--paper-50);
  border: 2px solid var(--navy-900);
  box-shadow: 4px 4px 0 rgba(10, 26, 63, 0.12);
  padding: var(--sp-4);
  text-decoration: none;
  color: var(--ink-900);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-home .chapter-link:hover,
.page-home .chapter-link:focus {
  transform: translate(-2px, -2px);
  box-shadow: 6px 6px 0 rgba(10, 26, 63, 0.18);
}

.page-home .chapter-num {
  font-family: var(--font-mono);
  font-size: 0.9375rem;
  color: var(--gold-500);
}

.page-home .chapter-name {
  font-size: 1.125rem;
  font-weight: 700;
  margin-top: var(--sp-2);
  color: var(--ink-900);
}

.page-home .chapter-desc {
  font-size: 0.875rem;
  color: var(--ink-600);
  line-height: 1.5;
  margin: 0;
}

/* ========== 收藏对照指南 ========== */
.page-home .home-guide {
  padding: var(--sp-6) 0;
  background: var(--paper-50);
}

.page-home .guide-head,
.page-home .index-head {
  max-width: 760px;
  margin-bottom: var(--sp-5);
}

.page-home .guide-head h2,
.page-home .return-copy h2,
.page-home .index-head h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  line-height: 1.3;
  margin: var(--sp-3) 0 0;
  color: var(--ink-900);
}

.page-home .guide-summary,
.page-home .index-desc {
  margin-top: var(--sp-3);
  color: var(--ink-600);
  font-size: 1rem;
  line-height: 1.7;
}

.page-home .guide-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-5);
}

.page-home .guide-map {
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
  border-left: 3px solid var(--gold-500);
  padding-left: var(--sp-4);
}

.page-home .map-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--sp-3);
  padding: var(--sp-3) 0;
  border-bottom: 1px solid rgba(10, 26, 63, 0.08);
}

.page-home .map-letter {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: rgba(212, 175, 55, 0.22);
  border: 2px solid var(--gold-500);
  color: var(--navy-900);
  font-size: 1.125rem;
  font-weight: 700;
}

.page-home .map-copy h3 {
  margin: 0 0 var(--sp-2);
  font-size: 1.0625rem;
  color: var(--ink-900);
}

.page-home .map-copy p {
  margin: 0;
  color: var(--ink-600);
  font-size: 0.9375rem;
  line-height: 1.65;
}

.page-home .guide-visual {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.page-home .guide-visual img {
  display: block;
  width: 100%;
  height: auto;
  border: 3px solid var(--navy-900);
  box-shadow: var(--shadow-hard);
}

/* ========== 回访用户路径 ========== */
.page-home .home-return {
  padding: var(--sp-7) 0;
}

.page-home .return-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-5);
}

.page-home .return-copy p {
  color: var(--ink-600);
  line-height: 1.7;
  margin-top: var(--sp-3);
}

.page-home .return-list {
  list-style: none;
  margin: var(--sp-4) 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.page-home .return-list li {
  display: flex;
  align-items: baseline;
  gap: var(--sp-3);
  border-bottom: 1px dashed rgba(10, 26, 63, 0.15);
  padding-bottom: var(--sp-2);
  color: var(--ink-900);
  font-size: 0.9375rem;
}

.page-home .return-list .mono {
  color: var(--gold-500);
  font-weight: 700;
}

.page-home .return-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-top: var(--sp-4);
}

.page-home .return-visual {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  background: var(--paper-50);
  border: 3px solid var(--navy-900);
  box-shadow: var(--shadow-hard);
  padding: var(--sp-3);
}

.page-home .return-visual img {
  display: block;
  width: 100%;
  height: auto;
}

/* ========== 小屏导出流程 ========== */
.page-home .home-export {
  padding: var(--sp-7) 0;
}

.page-home .home-export .section-kicker {
  color: var(--gold-300);
}

.page-home .export-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-5);
}

.page-home .export-visual {
  display: flex;
  justify-content: center;
}

.page-home .export-phone {
  display: block;
  width: 100%;
  max-width: 320px;
  height: auto;
  border: 3px solid var(--gold-500);
  box-shadow: 10px 10px 0 rgba(0, 0, 0, 0.35);
}

.page-home .export-copy h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.25rem);
  line-height: 1.3;
  margin: var(--sp-3) 0 0;
  color: var(--paper-50);
}

.page-home .export-desc {
  margin-top: var(--sp-3);
  color: rgba(247, 247, 245, 0.85);
  line-height: 1.7;
}

.page-home .export-steps {
  list-style: none;
  margin: var(--sp-4) 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
}

.page-home .export-steps li {
  display: flex;
  align-items: baseline;
  gap: var(--sp-3);
  border-bottom: 1px solid rgba(212, 175, 55, 0.3);
  padding-bottom: var(--sp-2);
  color: var(--paper-50);
  font-size: 0.9375rem;
}

.page-home .export-steps .mono {
  color: var(--gold-300);
  font-weight: 700;
}

.page-home .export-cta {
  display: flex;
  align-items: center;
  gap: var(--sp-4);
  margin-top: var(--sp-5);
}

.page-home .export-timer {
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--gold-300);
}

/* ========== 全站入口导览 ========== */
.page-home .home-index {
  padding: var(--sp-6) 0 60px;
  background: var(--paper-50);
}

.page-home .index-head h2 {
  color: var(--ink-900);
}

.page-home .site-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-3);
  margin: 0 0 var(--sp-5);
  padding: var(--sp-4);
  background: var(--paper-50);
  border: 2px solid var(--navy-900);
  box-shadow: var(--shadow-sm);
}

.page-home .fact-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--sp-1);
  padding: var(--sp-3);
  border-left: 3px solid var(--gold-500);
  background: rgba(10, 26, 63, 0.02);
}

.page-home .fact-num {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--navy-900);
}

.page-home .fact-label {
  font-size: 0.8125rem;
  color: var(--ink-600);
}

.page-home .index-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-4);
}

.page-home .home-door-card {
  display: block;
  position: relative;
  padding: var(--sp-4);
  background: var(--paper-50);
  border: 2px solid var(--navy-900);
  box-shadow: 4px 4px 0 rgba(10, 26, 63, 0.1);
  text-decoration: none;
  color: var(--ink-900);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-home .home-door-card::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  width: 18px;
  height: 18px;
  border-top: 3px solid var(--gold-500);
  border-left: 3px solid var(--gold-500);
}

.page-home .home-door-card:hover,
.page-home .home-door-card:focus {
  transform: translate(-3px, -3px);
  box-shadow: 7px 7px 0 rgba(10, 26, 63, 0.16);
}

.page-home .home-door-card h3 {
  margin: var(--sp-3) 0 var(--sp-2);
  font-size: 1.25rem;
  color: var(--ink-900);
}

.page-home .home-door-card p {
  margin: 0;
  color: var(--ink-600);
  font-size: 0.875rem;
  line-height: 1.6;
}

.page-home .index-foot {
  margin-top: var(--sp-5);
  padding-top: var(--sp-4);
  border-top: 1px solid rgba(10, 26, 63, 0.12);
  color: var(--ink-600);
  font-size: 0.875rem;
}

.page-home .index-foot a {
  color: var(--navy-900);
  text-decoration: underline;
}

/* ========== 响应式 ========== */
@media (min-width: 720px) {
  .page-home .chapter-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-home .guide-layout {
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
  }

  .page-home .return-layout {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }

  .page-home .export-layout {
    grid-template-columns: 320px 1fr;
    align-items: center;
  }

  .page-home .index-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-home .site-facts {
    grid-template-columns: repeat(4, 1fr);
  }
}

@media (min-width: 1024px) {
  .page-home .hero-layout {
    grid-template-columns: 7fr 5fr;
    align-items: stretch;
  }

  .page-home .chapter-strip {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-home .index-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}