.page-home {
  --home-glow: 0 22px 60px rgba(0, 0, 0, .62);
  --home-offset: clamp(0px, 3vw, 30px);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-home .hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-top: clamp(20px, 4vw, 44px);
}

.page-home .hero::before {
  content: "";
  position: absolute;
  inset: -14% -22% 34% 18%;
  background: linear-gradient(135deg, rgba(138, 92, 255, .30), rgba(41, 242, 224, .11) 46%, transparent 72%);
  clip-path: polygon(30% 0, 100% 0, 100% 60%, 48% 100%, 0 76%, 8% 20%);
  z-index: -1;
  pointer-events: none;
}

.page-home .hero__context {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(26px, 4vw, 44px);
  font-size: var(--fs-label);
  letter-spacing: .2em;
  color: var(--gray);
  text-transform: uppercase;
}

.page-home .hero__sep {
  color: var(--line);
}

.page-home .hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(34px, 6vw, 60px);
}

.page-home .hero__title {
  margin: 0 0 24px;
  font-family: var(--font-display);
  font-size: clamp(36px, 7.6vw, 82px);
  font-weight: 900;
  line-height: .98;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-home .hero__accent {
  color: var(--cyan);
}

.page-home .hero__intro {
  margin: 0 0 32px;
  max-width: 46ch;
  font-size: var(--fs-body);
  line-height: 1.78;
  color: var(--muted);
}

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

.page-home .hero__stage {
  position: relative;
  padding-bottom: 8px;
}

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

.page-home .hero__board {
  margin: -34px 0 0 clamp(0px, 5vw, 46px);
  padding: 22px 24px 18px;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(14, 18, 32, .97), rgba(6, 7, 12, .94));
  box-shadow: var(--home-glow);
  transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}

.page-home .hero__board:hover,
.page-home .hero__board:focus-within {
  transform: translateY(-4px);
  border-color: rgba(41, 242, 224, .55);
  box-shadow: 0 26px 70px rgba(41, 242, 224, .14);
}

.page-home .hero__board-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-home .hero__board-code {
  font-size: var(--fs-label);
  letter-spacing: .18em;
  color: var(--gray);
}

.page-home .board-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(35, 42, 61, .8);
}

.page-home .board-row:last-child {
  border-bottom: 0;
  padding-bottom: 4px;
}

.page-home .board-row__label {
  font-size: var(--fs-note);
  color: var(--gray);
}

.page-home .board-row__value {
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-home .board-row__value--orange {
  color: var(--orange);
}

/* ---------- 章节目录 ---------- */
.page-home .home-toc {
  margin-top: clamp(52px, 7vw, 92px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-home .home-toc__inner {
  display: flex;
  gap: 8px;
  padding: 14px 0;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-home .home-toc__inner::-webkit-scrollbar {
  display: none;
}

.page-home .home-toc__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 10px 18px;
  border-radius: var(--r-pill);
  border: 1px solid var(--line);
  font-size: var(--fs-note);
  color: var(--muted);
  white-space: nowrap;
  text-decoration: none;
  transition: border-color .18s ease, color .18s ease, background-color .18s ease;
}

.page-home .home-toc__link .mono {
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-home .home-toc__link:hover,
.page-home .home-toc__link:focus-visible {
  border-color: var(--cyan);
  color: var(--white);
  background: rgba(41, 242, 224, .08);
}

/* ---------- 标题行修正 ---------- */
.page-home .section__title {
  display: block;
  margin: 0 0 12px;
}

.page-home .sec-index {
  display: block;
  margin-bottom: 14px;
}

.page-home .section__note {
  max-width: 56ch;
  margin: 0;
}

/* ---------- V4 改动 ---------- */
.page-home .v4-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  align-items: start;
}

.page-home .v4-figure {
  margin: 0;
}

.page-home .v4-cards {
  display: grid;
  gap: 18px;
}

.page-home .v4-card {
  position: relative;
  padding: 26px 26px 30px;
  border-radius: var(--r-card);
  border: 1px solid var(--line);
  background: var(--panel);
  transition: border-color .2s ease, transform .2s ease;
}

.page-home .v4-card:hover,
.page-home .v4-card:focus-visible,
.page-home .v4-card:focus-within {
  border-color: rgba(41, 242, 224, .5);
  transform: translateY(-3px);
}

.page-home .v4-card__num {
  display: block;
  margin-bottom: 14px;
  font-size: var(--fs-label);
  letter-spacing: .22em;
  color: var(--violet);
}

.page-home .v4-card__title {
  margin: 0 0 12px;
  font-size: var(--fs-card);
  font-weight: 800;
  line-height: 1.25;
  color: var(--white);
}

.page-home .v4-card__text {
  margin: 0;
  font-size: var(--fs-note);
  line-height: 1.78;
  color: var(--gray);
}

.page-home .v4-foot {
  margin: 34px 0 0;
  padding-left: 18px;
  border-left: 2px solid var(--violet);
  font-size: var(--fs-note);
  line-height: 1.8;
  color: var(--muted);
  max-width: 62ch;
}

/* ---------- 动线 ---------- */
.page-home .flow-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-home .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 24px;
}

.page-home .flow__step {
  position: relative;
  padding-left: 24px;
  border-left: 1px solid var(--line);
}

.page-home .flow__step::before {
  content: "";
  position: absolute;
  left: -4px;
  top: 7px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(41, 242, 224, .14);
}

.page-home .flow__num {
  display: block;
  margin-bottom: 8px;
  font-size: var(--fs-label);
  letter-spacing: .22em;
  color: var(--gray);
}

.page-home .flow__title {
  margin: 0 0 10px;
  font-size: clamp(18px, 1.6vw, 22px);
  font-weight: 700;
  color: var(--white);
}

.page-home .flow__text {
  margin: 0;
  font-size: var(--fs-note);
  line-height: 1.8;
  color: var(--gray);
  max-width: 52ch;
}

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

/* ---------- 栏目总览 ---------- */
.page-home .dir {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-home .dir__link {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 8px 16px;
  align-items: baseline;
  padding: 24px 6px;
  border-top: 1px solid var(--line);
  text-decoration: none;
  color: inherit;
  transition: background-color .18s ease, padding-left .18s ease;
}

.page-home .dir__row:last-child .dir__link {
  border-bottom: 1px solid var(--line);
}

.page-home .dir__link:hover,
.page-home .dir__link:focus-visible {
  background: rgba(41, 242, 224, .05);
  padding-left: 14px;
}

.page-home .dir__id {
  font-size: var(--fs-label);
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-home .dir__body {
  display: block;
}

.page-home .dir__name {
  display: block;
  margin-bottom: 8px;
  font-size: clamp(20px, 2vw, 26px);
  font-weight: 800;
  color: var(--white);
  transition: color .18s ease;
}

.page-home .dir__link:hover .dir__name,
.page-home .dir__link:focus-visible .dir__name {
  color: var(--cyan);
}

.page-home .dir__desc {
  display: block;
  font-size: var(--fs-note);
  line-height: 1.78;
  color: var(--gray);
  max-width: 58ch;
}

.page-home .dir__meta {
  grid-column: 2;
  font-size: var(--fs-label);
  letter-spacing: .1em;
  color: var(--violet);
}

/* ---------- 更新节奏 ---------- */
.page-home .rhythm {
  position: relative;
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--ink);
}

.page-home .rhythm__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .3;
}

.page-home .rhythm__panel {
  position: relative;
  padding: clamp(26px, 4.6vw, 56px);
  background: linear-gradient(120deg, rgba(6, 7, 12, .94), rgba(6, 7, 12, .7));
}

.page-home .rhythm__stats {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 18px;
}

.page-home .stat {
  display: grid;
  gap: 8px;
}

.page-home .stat__num {
  font-size: clamp(30px, 4.4vw, 52px);
  font-weight: 700;
  line-height: 1;
  color: var(--white);
}

.page-home .stat:nth-child(1) .stat__num { color: var(--cyan); }
.page-home .stat:nth-child(2) .stat__num { color: var(--violet); }
.page-home .stat:nth-child(3) .stat__num { color: var(--lime); }

.page-home .stat__num--orange {
  color: var(--orange);
}

.page-home .stat__label {
  font-size: var(--fs-label);
  letter-spacing: .1em;
  color: var(--gray);
}

.page-home .rhythm__text {
  margin: 0;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  max-width: 66ch;
  font-size: var(--fs-note);
  line-height: 1.85;
  color: var(--muted);
}

/* ---------- 第一次来 ---------- */
.page-home .start-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-home .start-card {
  display: flex;
  flex-direction: column;
  padding: 28px 26px 26px;
  border-radius: var(--r-card);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(14, 18, 32, .96), rgba(6, 7, 12, .9));
  transition: border-color .2s ease, transform .2s ease;
}

.page-home .start-card:hover,
.page-home .start-card:focus-within {
  border-color: rgba(138, 92, 255, .55);
  transform: translateY(-3px);
}

.page-home .start-card__num {
  display: block;
  margin-bottom: 16px;
  font-size: var(--fs-label);
  letter-spacing: .24em;
  color: var(--violet);
}

.page-home .start-card__title {
  margin: 0 0 12px;
  font-size: var(--fs-card);
  font-weight: 800;
  color: var(--white);
}

.page-home .start-card__text {
  margin: 0 0 22px;
  font-size: var(--fs-note);
  line-height: 1.8;
  color: var(--gray);
}

.page-home .start-card__link {
  margin-top: auto;
  align-self: flex-start;
  font-size: var(--fs-note);
  font-weight: 700;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(41, 242, 224, .45);
  padding-bottom: 3px;
  transition: color .18s ease, border-color .18s ease;
}

.page-home .start-card__link:hover,
.page-home .start-card__link:focus-visible {
  color: var(--orange);
  border-color: var(--orange);
}

.page-home .start-foot {
  margin: 34px 0 20px;
  max-width: 60ch;
  font-size: var(--fs-note);
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-home .rhythm__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-home .start-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-home .hero__grid {
    grid-template-columns: 7fr 5fr;
    align-items: center;
  }

  .page-home .hero__stage {
    margin-left: var(--home-offset);
  }

  .page-home .hero__board {
    margin-left: clamp(20px, 3vw, 44px);
  }

  .page-home .v4-layout {
    grid-template-columns: 5fr 7fr;
    gap: 48px;
  }

  .page-home .v4-card:nth-child(2) {
    margin-left: 30px;
  }

  .page-home .v4-card:nth-child(3) {
    margin-left: 60px;
  }

  .page-home .flow-layout {
    grid-template-columns: 7fr 5fr;
    gap: 48px;
    align-items: start;
  }

  .page-home .flow__figure {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-home .dir__link {
    grid-template-columns: 56px minmax(0, 1fr) 190px;
    align-items: center;
    gap: 8px 24px;
    padding: 28px 8px;
  }

  .page-home .dir__meta {
    grid-column: auto;
    text-align: right;
  }
}

@media (min-width: 1180px) {
  .page-home .hero__title {
    max-width: 14ch;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .hero__board,
  .page-home .v4-card,
  .page-home .start-card,
  .page-home .dir__link,
  .page-home .home-toc__link {
    transition: none;
  }
}