.page-home [id] {
  scroll-margin-top: calc(var(--header-h) + 16px);
}

.page-home .page-context {
  margin: 0 0 clamp(20px, 3vw, 32px);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

/* ---------- 封面首屏 ---------- */

.page-home .home-hero {
  position: relative;
  padding-block: clamp(32px, 5vw, 64px) clamp(48px, 8vw, 104px);
  background-image:
    linear-gradient(rgba(41, 52, 74, 0.28) 1px, transparent 1px),
    linear-gradient(90deg, rgba(41, 52, 74, 0.28) 1px, transparent 1px);
  background-size: 320px 320px;
  background-position: center top;
}

.page-home .home-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(720px 420px at 80% 14%, rgba(53, 225, 228, 0.09), transparent 70%),
    radial-gradient(640px 460px at 10% 84%, rgba(29, 107, 255, 0.13), transparent 72%);
}

.page-home .hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

@media (min-width: 900px) {
  .page-home .hero-grid {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 60px);
    align-items: start;
  }
}

.page-home .hero-rail {
  display: grid;
  gap: 14px;
  padding-left: 16px;
  border-left: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-home .rail-status {
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 0 0 2px;
  color: var(--moss);
}

.page-home .rail-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--moss);
  box-shadow: 0 0 8px rgba(111, 155, 126, 0.6);
}

.page-home .rail-item {
  display: grid;
  gap: 3px;
  text-decoration: none;
  color: var(--mist);
  transition: color 0.14s var(--ease);
}

.page-home .rail-item:hover,
.page-home .rail-item:focus-visible {
  color: var(--paper);
}

.page-home .rail-num {
  color: var(--blue);
  font-weight: 600;
}

.page-home .rail-item:hover .rail-num {
  color: var(--cyan);
}

.page-home .hero-stage {
  position: relative;
  isolation: isolate;
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  min-height: clamp(400px, 58vh, 620px);
  padding: clamp(24px, 4vw, 56px);
  border: 1px solid var(--line);
  background: var(--glass);
}

.page-home .hero-visual {
  position: absolute;
  inset: 0;
  margin: 0;
  z-index: -1;
  opacity: 0.34;
}

.page-home .hero-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-home .hero-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(6, 9, 16, 0.95) 0%, rgba(6, 9, 16, 0.74) 48%, rgba(6, 9, 16, 0.32) 100%);
}

.page-home .hero-copy {
  max-width: 46rem;
}

.page-home .hero-signature {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-home .hero-title {
  margin: 16px 0 18px;
  font-size: clamp(32px, 6vw, 72px);
  font-weight: 250;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-home .hero-lead {
  margin: 0;
  max-width: 40ch;
  font-size: 16px;
  line-height: 1.72;
  color: var(--mist);
}

.page-home .hero-index {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: 32px 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 720px) {
  .page-home .hero-index {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-home .hero-index li {
  display: grid;
  gap: 7px;
  align-content: start;
  padding: 16px 18px;
  background: var(--panel);
  border-left: 2px solid transparent;
  transition: background 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-home .hero-index li:hover {
  background: var(--focus);
  border-left-color: var(--cyan);
}

.page-home .idx-num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--blue);
}

.page-home .idx-title {
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-home .idx-desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

.page-home .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ---------- 第 2 栏：备份 ---------- */

.page-home .backup-block {
  background: linear-gradient(180deg, rgba(21, 28, 41, 0) 0%, rgba(21, 28, 41, 0.55) 100%);
}

.page-home .backup-grid {
  display: grid;
  gap: 28px;
}

@media (min-width: 900px) {
  .page-home .backup-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }
}

.page-home .backup-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
}

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

.page-home .backup-steps {
  display: grid;
  gap: 12px;
}

.page-home .backup-steps .disclosure {
  border: 1px solid var(--line);
  border-left: 2px solid var(--clay);
  background: var(--panel);
  transition: border-color 0.16s var(--ease);
}

.page-home .backup-steps .disclosure:hover {
  border-color: var(--blue);
  border-left-color: var(--clay);
}

/* ---------- 多链路径带 ---------- */

.page-home .band-inner {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
}

.page-home .band-figure {
  position: absolute;
  inset: 0;
  margin: 0;
  z-index: -1;
  opacity: 0.24;
}

.page-home .band-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-home .band-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(6, 9, 16, 0.96) 0%, rgba(6, 9, 16, 0.58) 100%);
}

.page-home .band-content {
  padding: clamp(24px, 4vw, 52px);
}

.page-home .band-groups {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: 30px 0 0;
  padding: 0;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

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

.page-home .band-groups li {
  padding: 18px 16px;
  background: var(--panel);
  transition: background 0.16s var(--ease);
}

.page-home .band-groups li:hover {
  background: var(--focus);
}

.page-home .band-group-name {
  margin: 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--paper);
}

.page-home .band-group-desc {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.62;
  color: var(--mist);
}

.page-home .band-link {
  margin: 26px 0 0;
}

/* ---------- 私钥自持边界板 ---------- */

.page-home .custody-grid {
  display: grid;
  gap: 30px;
}

@media (min-width: 880px) {
  .page-home .custody-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: center;
  }
}

.page-home .custody-matrix {
  display: grid;
  gap: 1px;
  margin: 26px 0;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 640px) {
  .page-home .custody-matrix {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-home .custody-cell {
  padding: 18px 18px 20px;
  background: var(--panel);
}

.page-home .custody-cell h3 {
  margin: 0 0 12px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.page-home .custody-cell--you h3 {
  color: var(--cyan);
}

.page-home .custody-cell--site h3 {
  color: var(--mist);
}

.page-home .custody-cell ul {
  margin: 0;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper);
}

.page-home .custody-cell--site ul {
  color: var(--mist);
}

.page-home .custody-links {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
  margin: 24px 0 0;
}

.page-home .custody-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--focus);
}

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

/* ---------- 费用口径 ---------- */

.page-home .fees {
  background: linear-gradient(180deg, rgba(11, 27, 54, 0.55) 0%, rgba(6, 9, 16, 0) 100%);
}

.page-home .fee-grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 760px) {
  .page-home .fee-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-home .fee-item {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 24px 20px;
  background: var(--panel);
  transition: background 0.16s var(--ease);
}

.page-home .fee-item:hover {
  background: var(--focus);
}

.page-home .fee-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--blue);
}

.page-home .fee-title {
  margin: 0;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-home .fee-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

.page-home .fees-link {
  margin: 26px 0 0;
}

/* ---------- 文档索引 ---------- */

.page-home .doc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-home .doc-item {
  display: grid;
  gap: 8px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

@media (min-width: 760px) {
  .page-home .doc-item {
    grid-template-columns: 64px minmax(0, 1.5fr) minmax(0, 0.9fr) minmax(0, 1fr);
    align-items: baseline;
    gap: 20px;
  }
}

.page-home .doc-code {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--blue);
}

.page-home .doc-cat {
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-home .doc-meta {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--mist);
}

/* ---------- 版本与更新 ---------- */

.page-home .update-strip {
  display: grid;
  gap: 16px;
  align-content: start;
  padding: clamp(24px, 3.5vw, 40px);
  border: 1px solid var(--line);
  border-left: 2px solid var(--clay);
  background: var(--panel);
}

.page-home .update-strip .section-lead {
  max-width: 62ch;
}

.page-home .update-strip p:last-child {
  margin: 6px 0 0;
}

/* ---------- 联系与备案 ---------- */

.page-home .contact-grid {
  display: grid;
  gap: 30px;
}

@media (min-width: 880px) {
  .page-home .contact-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }
}

.page-home .contact-list {
  margin: 0;
  border-top: 1px solid var(--line);
}

.page-home .contact-links {
  margin: 22px 0 0;
}

.page-home .contact-note {
  margin: 28px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 70ch;
}