.page-home {
  --home-rule: rgba(124, 138, 165, .3);
  display: block;
  overflow-x: clip;
}

/* ---------- 封面 ---------- */
.page-home .cover {
  position: relative;
  overflow: hidden;
  background: var(--indigo-900);
  color: var(--on-dark);
  padding: clamp(44px, 8vw, 104px) 0 clamp(64px, 10vw, 148px);
}

.page-home .cover__art {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  width: 70%;
  max-width: 1000px;
  pointer-events: none;
}

.page-home .cover__art img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center right;
  opacity: .4;
  -webkit-mask-image: linear-gradient(100deg, transparent 0%, rgba(0, 0, 0, .55) 40%, #000 100%);
  mask-image: linear-gradient(100deg, transparent 0%, rgba(0, 0, 0, .55) 40%, #000 100%);
}

.page-home .cover__inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(40px, 6vw, 64px);
  align-items: start;
}

.page-home .cover__eyebrow {
  color: var(--cyan);
  margin: 0;
}

.page-home .cover__title {
  margin: 18px 0 clamp(20px, 3vw, 30px);
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(58px, 14vw, 150px);
  line-height: .9;
  letter-spacing: -.038em;
  color: var(--on-dark);
}

.page-home .cover__title em {
  font-style: normal;
  color: var(--cyan);
}

.page-home .cover__lede {
  max-width: 33em;
  margin: 0 0 clamp(26px, 3.4vw, 40px);
  font-size: clamp(16px, 1.15vw, 18px);
  line-height: 1.85;
  color: var(--on-dark-muted);
}

.page-home .cover__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-home .cover__aside {
  min-width: 0;
}

.page-home .cover__aside-label {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--on-dark-muted);
}

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

.page-home .cover__index-item a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  padding: 18px 2px;
  border-top: 1px solid var(--line-dark);
  color: inherit;
  text-decoration: none;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-home .cover__index-item:last-child a {
  border-bottom: 1px solid var(--line-dark);
}

.page-home .cover__index-num {
  font-size: 12px;
  line-height: 1.9;
  color: var(--cyan);
}

.page-home .cover__index-name {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--on-dark);
  transition: color .2s var(--ease);
}

.page-home .cover__index-note {
  grid-column: 2;
  margin-top: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--on-dark-muted);
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height .26s var(--ease), opacity .26s var(--ease), margin-top .26s var(--ease);
}

.page-home .cover__index-item a:hover,
.page-home .cover__index-item a:focus-visible {
  border-color: var(--line-cyan);
}

.page-home .cover__index-item a:hover .cover__index-name,
.page-home .cover__index-item a:focus-visible .cover__index-name {
  color: var(--cyan);
}

.page-home .cover__index-item a:hover .cover__index-note,
.page-home .cover__index-item a:focus-visible .cover__index-note {
  max-height: 72px;
  opacity: 1;
  margin-top: 6px;
}

@media (hover: none) {
  .page-home .cover__index-note {
    max-height: 72px;
    opacity: 1;
    margin-top: 6px;
  }
}

/* ---------- 章节锚点 ---------- */
.page-home .spy-nav {
  display: none;
}

/* ---------- 通用章节 ---------- */
.page-home .chapter {
  padding: clamp(64px, 9vw, 128px) 0;
}

.page-home .chapter .section-head {
  margin-bottom: clamp(36px, 5vw, 68px);
}

.page-home .chapter__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 4.5vw, 56px);
  align-items: start;
}

.page-home .chapter__body {
  min-width: 0;
}

.page-home .chapter__body.prose p {
  margin-top: 0;
  margin-bottom: 1.15em;
}

.page-home .chapter__figure {
  margin: 0;
}

.page-home .check-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-cyan);
}

.page-home .plate--teal .check-list {
  border-top-color: var(--line-cyan);
}

.page-home .check-list li {
  position: relative;
  padding: 14px 0 14px 26px;
  border-bottom: 1px solid var(--line-cyan);
  font-size: 15.5px;
  line-height: 1.75;
}

.page-home .check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  width: 9px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- 状态面板 ---------- */
.page-home .status-panels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
  border-radius: 3px;
  overflow: hidden;
}

.page-home .status-panel {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(24px, 3vw, 38px) clamp(20px, 2.6vw, 32px);
  background: #fff;
  transition: transform .2s var(--ease), box-shadow .2s var(--ease);
}

.page-home .status-panel:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-1);
}

.page-home .status-panel__head {
  display: flex;
  align-items: center;
  gap: 9px;
}

.page-home .status-panel__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex: none;
}

.page-home .status-panel__dot--cyan {
  background: var(--cyan-ink);
}

.page-home .status-panel__dot--orange {
  background: var(--orange);
}

.page-home .status-panel__dot--wine {
  background: var(--wine);
}

.page-home .status-panel__title {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-home .status-panel__num {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(36px, 5.2vw, 54px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-home .status-panel__num small {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: .02em;
  color: var(--muted);
}

.page-home .status-panel__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink);
}

.page-home .status-panel__link {
  margin-top: auto;
  align-self: flex-start;
  font-size: 14px;
  font-weight: 600;
  color: var(--cyan-ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

.page-home .status-panel__link:hover,
.page-home .status-panel__link:focus-visible {
  color: var(--ink);
  border-bottom-color: var(--ink);
}

/* ---------- 折叠面板 ---------- */
.page-home .fold-stack {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--hair);
}

.page-home .fold {
  border-bottom: 1px solid var(--hair);
}

.page-home .fold__summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 6px 18px;
  padding: 20px 34px 20px 0;
  cursor: pointer;
  list-style: none;
  position: relative;
  transition: color .18s var(--ease);
}

.page-home .fold__summary::-webkit-details-marker {
  display: none;
}

.page-home .fold__summary::after {
  content: "";
  position: absolute;
  right: 6px;
  top: 50%;
  width: 11px;
  height: 11px;
  margin-top: -6px;
  border-right: 1.5px solid var(--muted);
  border-bottom: 1.5px solid var(--muted);
  transform: rotate(45deg);
  transition: transform .22s var(--ease);
}

.page-home .fold[open] .fold__summary::after {
  transform: rotate(-135deg);
}

.page-home .fold__summary:hover .fold__label {
  color: var(--cyan-ink);
}

.page-home .fold__label {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  transition: color .18s var(--ease);
}

.page-home .fold__hint {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-home .fold__body {
  margin: 0;
  padding: 0 40px 22px 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

/* ---------- 数据对照 ---------- */
.page-home .compare-figure {
  margin: 0 0 clamp(34px, 5vw, 56px);
}

.page-home .compare-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: rgba(255, 255, 255, .16);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 3px;
  overflow: hidden;
}

.page-home .compare-cell {
  padding: clamp(22px, 2.8vw, 32px);
  background: rgba(11, 22, 51, .28);
  transition: background .2s var(--ease);
}

.page-home .compare-cell:hover {
  background: rgba(11, 22, 51, .46);
}

.page-home .compare-cell__tag {
  display: inline-block;
  margin: 0 0 12px;
}

.page-home .compare-cell__title {
  margin: 0 0 8px;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--on-dark);
}

.page-home .compare-cell__body {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--on-dark-muted);
}

.page-home .compare-note {
  margin-top: clamp(34px, 5vw, 58px);
  padding: clamp(26px, 3.4vw, 40px);
  border: 1px solid rgba(255, 255, 255, .2);
  border-radius: 3px;
  background: rgba(11, 22, 51, .34);
}

.page-home .compare-note__title {
  margin: 0 0 12px;
  font-size: clamp(20px, 2.2vw, 26px);
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--on-dark);
}

.page-home .compare-note__body {
  margin: 0 0 20px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--on-dark-muted);
}

.page-home .compare-note__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 上手与支持 ---------- */
.page-home .support-figure {
  margin: 0;
}

.page-home .support-figure img {
  max-height: 620px;
  object-fit: cover;
  object-position: center top;
}

.page-home .steps {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--hair);
}

.page-home .step {
  padding: 22px 0;
  border-bottom: 1px solid var(--hair);
}

.page-home .step__num {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--cyan-ink);
}

.page-home .step__title {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--ink);
}

.page-home .step__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-home .support-contact {
  margin-top: clamp(30px, 4vw, 46px);
  padding: clamp(24px, 3vw, 34px);
  background: var(--indigo-900);
  border-radius: 3px;
  color: var(--on-dark);
}

.page-home .support-contact__title {
  margin: 0 0 12px;
  font-size: clamp(19px, 2vw, 23px);
  font-weight: 800;
  letter-spacing: .01em;
  color: var(--on-dark);
}

.page-home .support-contact__body {
  margin: 0 0 20px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--on-dark-muted);
}

.page-home .support-contact__list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  border-top: 1px solid var(--line-dark);
}

.page-home .support-contact__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-dark);
}

.page-home .support-contact__key {
  flex: none;
  width: 5.5em;
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--on-dark-muted);
}

.page-home .support-contact__val {
  font-size: 15px;
  color: var(--on-dark);
  word-break: break-all;
}

.page-home .support-contact .copy-btn {
  margin-left: auto;
}

.page-home .support-contact .btn--primary {
  background: var(--orange);
  border-color: var(--orange);
  color: #1b0d05;
}

.page-home .support-contact .btn--primary:hover,
.page-home .support-contact .btn--primary:focus-visible {
  background: #ff9160;
  border-color: #ff9160;
  color: #1b0d05;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-home .status-panels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 920px) {
  .page-home .cover__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(48px, 5vw, 96px);
  }

  .page-home .cover__aside {
    padding-top: clamp(26px, 4vw, 58px);
  }

  .page-home .chapter__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: clamp(40px, 5vw, 88px);
  }

  .page-home .chapter__grid--narrow {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }

  .page-home .chapter__grid--flip > .chapter__body {
    order: 1;
  }

  .page-home .chapter__grid--flip > .support-figure {
    order: 2;
  }

  .page-home .compare-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 1200px) {
  .page-home .spy-nav {
    display: flex;
    flex-direction: column;
    gap: 11px;
    position: fixed;
    right: 16px;
    top: 46%;
    transform: translateY(-50%);
    z-index: 30;
    max-width: 138px;
  }

  .page-home .spy-link {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 3px 0;
    font-size: 11.5px;
    letter-spacing: .03em;
    line-height: 1.4;
    color: var(--muted);
    text-decoration: none;
    text-align: right;
    justify-content: flex-end;
    transition: color .18s var(--ease);
  }

  .page-home .spy-link:hover,
  .page-home .spy-link:focus-visible {
    color: var(--ink);
  }

  .page-home .spy-link.is-active {
    color: var(--ink);
    font-weight: 700;
  }

  .page-home .spy-link.is-active .spy-link__num {
    color: var(--cyan-ink);
  }

  .page-home .spy-link__num {
    font-size: 10.5px;
    color: var(--muted);
    transition: color .18s var(--ease);
  }
}

@media (max-width: 719px) {
  .page-home .cover__art {
    width: 100%;
    max-width: none;
    opacity: .55;
  }

  .page-home .cover__art img {
    -webkit-mask-image: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, .6) 58%, #000 100%);
    mask-image: linear-gradient(180deg, transparent 0%, rgba(0, 0, 0, .6) 58%, #000 100%);
  }

  .page-home .support-contact__list li {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-home .support-contact .copy-btn {
    margin-left: 0;
  }

  .page-home .fold__summary {
    padding-right: 28px;
  }

  .page-home .fold__body {
    padding-right: 0;
  }
}