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

.page-home h1,
.page-home h2,
.page-home h3 {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.12;
}

.page-home p {
  margin: 0;
}

.page-home .num {
  font-family: var(--font-mono);
  font-weight: 500;
  letter-spacing: 0.08em;
}

/* ---------- 首屏框景 ---------- */
.page-home .hero {
  padding: 20px 0 clamp(34px, 5vw, 56px);
}

.page-home .hero-frame {
  position: relative;
  width: calc(100% - var(--gutter) * 2);
  max-width: 1336px;
  margin: 0 auto;
  padding: clamp(20px, 3vw, 40px);
  border: 1px solid var(--steel);
  background:
    radial-gradient(120% 90% at 82% 0%, rgba(31, 224, 208, 0.12), transparent 62%),
    linear-gradient(180deg, #07182b 0%, #05121f 72%);
  box-shadow: var(--shadow-deep);
}

.page-home .hero-frame::before,
.page-home .hero-frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 7px;
  background-image: repeating-linear-gradient(90deg, var(--steel) 0 1px, transparent 1px 15px);
  pointer-events: none;
  opacity: 0.9;
}

.page-home .hero-frame::before { top: -8px; }
.page-home .hero-frame::after { bottom: -8px; }

.page-home .hero-corner {
  position: absolute;
  width: 14px;
  height: 14px;
  border: 2px solid var(--amber);
  pointer-events: none;
  z-index: 2;
}

.page-home .hero-corner--tl { top: -2px; left: -2px; border-right: 0; border-bottom: 0; }
.page-home .hero-corner--tr { top: -2px; right: -2px; border-left: 0; border-bottom: 0; }
.page-home .hero-corner--bl { bottom: -2px; left: -2px; border-right: 0; border-top: 0; }
.page-home .hero-corner--br { bottom: -2px; right: -2px; border-left: 0; border-top: 0; }

.page-home .hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
}

.page-home .hero-context {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
  padding: 6px 12px;
  border: 1px solid var(--steel);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-home .hero-context .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(31, 224, 208, 0.16);
  animation: home-breathe 3s ease-in-out infinite;
}

@keyframes home-breathe {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.page-home .hero h1 {
  margin: 10px 0 18px;
  font-size: clamp(40px, 8.4vw, 82px);
  color: var(--paper);
}

.page-home .hero h1 .hl {
  color: var(--cyan);
}

.page-home .hero-lead {
  max-width: 24em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.9;
  color: var(--mist);
}

.page-home .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-home .hero-visual {
  position: relative;
  display: flex;
  flex-direction: column;
}

.page-home .hero-visual-bg {
  display: block;
  width: 100%;
  height: clamp(200px, 46vw, 300px);
  object-fit: cover;
  opacity: 0.62;
  filter: saturate(0.9) contrast(1.05);
}

.page-home .hero-panel {
  position: relative;
  z-index: 1;
  margin: -72px 12px 0;
  padding: 18px 18px 16px;
  background: rgba(6, 21, 39, 0.74);
  border: 1px solid var(--steel);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-deep);
}

.page-home .panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(16, 62, 92, 0.9);
}

.page-home .panel-status {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan-soft);
}

.page-home .panel-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  animation: home-breathe 3s ease-in-out infinite;
}

.page-home .panel-ver {
  font-size: 12px;
  color: var(--amber);
}

.page-home .panel-label {
  margin: 14px 0 4px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-home .panel-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-home .panel-list a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid rgba(16, 62, 92, 0.75);
  color: var(--paper);
  font-size: 15px;
  text-decoration: none;
  transition: color 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.page-home .panel-list a:hover {
  color: var(--cyan);
  padding-left: 4px;
}

.page-home .panel-list .num {
  font-size: 12px;
  color: var(--amber);
}

.page-home .panel-foot {
  margin-top: 12px;
  font-size: 12.5px;
  color: var(--mist);
}

.page-home .panel-foot .num {
  color: var(--cyan);
}

.page-home .hero-status {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 0;
  margin-top: clamp(22px, 3vw, 34px);
  padding-top: 14px;
  border-top: 1px solid var(--steel);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-home .hero-status-item {
  padding-right: 14px;
  margin-right: 14px;
  position: relative;
}

.page-home .hero-status-item::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  width: 4px;
  height: 4px;
  transform: translateY(-50%) rotate(45deg);
  background: var(--amber);
}

.page-home .hero-status-item:last-child::after { display: none; }

/* ---------- 章节索引 ---------- */
.page-home .toc {
  position: sticky;
  top: var(--header-h);
  z-index: 6;
  width: calc(100% - var(--gutter) * 2);
  max-width: 1336px;
  margin: 0 auto clamp(26px, 4vw, 44px);
  padding: 0 4px;
  background: rgba(6, 21, 39, 0.92);
  border: 1px solid var(--steel);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-home .toc ol {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-home .toc a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 13px;
  border-bottom: 2px solid transparent;
  font-size: 13px;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-home .toc a .num {
  font-size: 11px;
  color: var(--amber);
}

.page-home .toc a:hover,
.page-home .toc a[aria-current="location"] {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 通用区块 ---------- */
.page-home .band {
  position: relative;
  padding: clamp(50px, 8vw, 96px) 0;
}

.page-home .band--paper {
  background: var(--paper);
  color: var(--black);
}

.page-home .band--paper h2 { color: var(--black); }

.page-home .band--paper .eyebrow { color: #8a5a10; }

.page-home .band--paper a:not(.btn) {
  color: #0a4f63;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-home .band-head {
  max-width: 760px;
  margin-bottom: clamp(24px, 4vw, 42px);
}

.page-home .band-head h2 {
  margin: 10px 0 14px;
  font-size: clamp(27px, 4.4vw, 44px);
}

.page-home .band-lead {
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
}

.page-home .band--paper .band-lead {
  color: rgba(18, 16, 14, 0.74);
}

/* ---------- 四条通道 ---------- */
.page-home .mission-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-home .mission {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 24px 22px 22px;
  background: linear-gradient(165deg, #0b2942 0%, #082035 100%);
  box-shadow: inset 3px 0 0 var(--cyan);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
  transition: transform 0.25s var(--ease), background 0.25s var(--ease);
}

.page-home .mission:hover {
  transform: translateY(-4px);
  background: linear-gradient(165deg, #0e3552 0%, #0a2740 100%);
}

.page-home .mission-no {
  position: absolute;
  top: 18px;
  right: 18px;
  font-size: 12px;
  color: rgba(246, 239, 227, 0.28);
}

.page-home .mission h3 {
  margin: 14px 0 10px;
  font-size: 20px;
  color: var(--paper);
}

.page-home .mission p {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-home .mission-where {
  margin-top: auto;
  padding-top: 16px;
  font-family: var(--font-mono);
  font-size: 12px !important;
  letter-spacing: 0.04em;
  color: var(--cyan-soft) !important;
  border-top: 1px dashed rgba(16, 62, 92, 0.95);
}

.page-home .mission-go {
  margin-top: 10px;
  font-size: 14px;
  font-weight: 700;
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  align-self: flex-start;
  transition: border-color 0.2s var(--ease);
}

.page-home .mission-go:hover {
  border-bottom-color: var(--amber);
}

.page-home .stream {
  display: block;
  width: 100%;
  height: clamp(38px, 5vw, 60px);
  margin-top: clamp(26px, 4vw, 44px);
  opacity: 0.9;
}

/* ---------- 版本变化 ---------- */
.page-home .version-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
}

.page-home .version-copy > p {
  max-width: 34em;
  margin-bottom: 22px;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(18, 16, 14, 0.76);
}

.page-home .ledger-wrap {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.page-home .ledger {
  width: 100%;
  border-collapse: collapse;
  font-size: 14.5px;
}

.page-home .ledger caption {
  padding-bottom: 12px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: #8a5a10;
}

.page-home .ledger th,
.page-home .ledger td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  line-height: 1.7;
}

.page-home .ledger--paper thead th {
  background: rgba(18, 16, 14, 0.07);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--black);
  border-bottom: 1px solid rgba(18, 16, 14, 0.2);
}

.page-home .ledger--paper tbody th {
  font-weight: 700;
  color: var(--black);
  white-space: nowrap;
}

.page-home .ledger--paper tbody td {
  color: rgba(18, 16, 14, 0.76);
  border-bottom: 1px solid rgba(18, 16, 14, 0.13);
}

.page-home .media-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--steel);
  background: #0a2033;
}

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

.page-home .version-media .media-frame img {
  aspect-ratio: 4 / 3;
}

.page-home .media-cap {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: #6d5f4a;
}

/* ---------- 换机接续 ---------- */
.page-home .switch-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
}

.page-home .switch h2 {
  margin: 10px 0 14px;
  font-size: clamp(27px, 4.4vw, 44px);
}

.page-home .steps {
  display: grid;
  gap: 12px;
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
}

.page-home .step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 18px 20px;
  border: 1px solid var(--steel);
  background: rgba(11, 41, 66, 0.6);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease);
}

.page-home .step:hover {
  border-color: var(--cyan);
  background: rgba(14, 53, 82, 0.7);
}

.page-home .step-no {
  font-size: 22px;
  line-height: 1;
  color: var(--amber);
}

.page-home .step h3 {
  margin-bottom: 6px;
  font-size: 17px;
  color: var(--paper);
}

.page-home .step p {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-home .switch-help {
  margin-top: 22px;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--mist);
}

.page-home .switch-help a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-home .switch-media .media-frame img {
  aspect-ratio: 1 / 1;
}

.page-home .switch-media .media-cap {
  color: var(--mist);
}

/* ---------- 规则更新 ---------- */
.page-home .rules-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
}

.page-home .timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  display: grid;
  gap: 22px;
  border-left: 1px solid rgba(18, 16, 14, 0.22);
}

.page-home .timeline li {
  position: relative;
}

.page-home .timeline li::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 3px rgba(242, 179, 75, 0.24);
}

.page-home .timeline .num {
  display: block;
  margin-bottom: 6px;
  font-size: 11.5px;
  color: #8a5a10;
}

.page-home .timeline h3 {
  margin-bottom: 6px;
  font-size: 17px;
  color: var(--black);
}

.page-home .timeline p {
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(18, 16, 14, 0.74);
}

.page-home .rules-more {
  margin-top: clamp(24px, 3vw, 36px);
  font-size: 15px;
  line-height: 1.9;
  color: rgba(18, 16, 14, 0.78);
}

/* ---------- 服务覆盖 ---------- */
.page-home .coverage {
  padding-top: clamp(46px, 7vw, 80px);
}

.page-home .coverage-band {
  position: relative;
  margin: clamp(22px, 4vw, 40px) 0 0;
}

.page-home .coverage-band img {
  display: block;
  width: 100%;
  height: clamp(170px, 26vw, 320px);
  object-fit: cover;
  opacity: 0.6;
}

.page-home .coverage-band::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 21, 39, 0.88), rgba(6, 21, 39, 0.18) 46%, rgba(6, 21, 39, 0.96));
  pointer-events: none;
}

.page-home .coverage-band .media-cap {
  position: absolute;
  right: var(--gutter);
  bottom: 12px;
  z-index: 1;
  margin: 0;
  color: var(--mist);
}

.page-home .coverage-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: clamp(24px, 3vw, 36px);
}

.page-home .stat {
  padding: 16px 18px;
  border: 1px solid var(--steel);
  background: rgba(11, 41, 66, 0.55);
}

.page-home .stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(23px, 3.4vw, 34px);
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--cyan);
  line-height: 1.1;
}

.page-home .stat-num small {
  font-size: 0.5em;
  color: var(--cyan-soft);
}

.page-home .stat-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-home .coverage-note {
  max-width: 40em;
  margin-top: 22px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--mist);
}

.page-home .coverage-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 常见疑问 ---------- */
.page-home .faq-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-home .qa {
  padding: 22px;
  border: 1px solid var(--steel);
  background: rgba(11, 41, 66, 0.45);
  border-left: 3px solid var(--amber);
}

.page-home .qa h3 {
  margin-bottom: 10px;
  font-size: 17px;
  color: var(--cyan-soft);
}

.page-home .qa p {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
}

.page-home .faq-more {
  margin-top: 22px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--mist);
}

.page-home .faq-more a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 收口 ---------- */
.page-home .closing {
  padding: clamp(46px, 7vw, 86px) 0;
  background: linear-gradient(180deg, #082035 0%, var(--ink) 100%);
  border-top: 1px solid var(--steel);
}

.page-home .closing-inner {
  display: grid;
  gap: 18px;
  justify-items: start;
}

.page-home .closing-label {
  padding: 5px 12px;
  border: 1px solid var(--amber);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--amber);
}

.page-home .closing-text {
  max-width: 26em;
  font-size: clamp(19px, 2.6vw, 27px);
  font-weight: 700;
  line-height: 1.55;
  color: var(--paper);
}

.page-home .closing-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-home .mission-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-home .coverage-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-home .hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: start;
  }

  .page-home .hero-visual-bg {
    height: clamp(260px, 28vw, 380px);
  }

  .page-home .hero-panel {
    margin: -88px 0 0 20px;
  }

  .page-home .switch-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
  }
}

@media (min-width: 920px) {
  .page-home .version-grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 0.72fr);
    align-items: start;
  }

  .page-home .rules-grid {
    grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
    align-items: start;
  }
}

@media (min-width: 1024px) {
  .page-home .mission-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

  .page-home .mission:nth-child(even) {
    margin-top: 28px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .hero-context .dot,
  .page-home .panel-dot {
    animation: none;
  }

  .page-home .mission,
  .page-home .step,
  .page-home .panel-list a {
    transition: none;
  }

  .page-home .mission:hover {
    transform: none;
  }
}

以上为页面专属 CSS，与前文 HTML 同步完成，所有页面选择器限定在 .page-home 作用域内，可直接接入共享外壳。