.page-home {
  --home-gap: clamp(2.75rem, 7vw, 6rem);
  --home-card-pad: clamp(1.25rem, 2.4vw, 1.85rem);
  --home-line: 1px solid var(--line);
  background: var(--ink-900);
  color: var(--paper);
  overflow-x: clip;
}

.page-home .breadcrumb {
  padding: clamp(1rem, 2.6vw, 1.75rem) 0 0;
}

.page-home .eyebrow {
  color: var(--muted);
  font-size: 0.75rem;
  letter-spacing: 0.22em;
}

.page-home .lede {
  max-width: var(--measure);
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: 1.85;
  color: rgba(245, 241, 232, 0.82);
}

.page-home .section {
  padding: var(--home-gap) 0;
  border-bottom: var(--home-line);
}

.page-home .home-sec--last {
  border-bottom: 0;
}

.page-home .section__head {
  max-width: 54rem;
  margin-bottom: clamp(1.75rem, 4vw, 3rem);
}

.page-home .row-mark {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  margin: 0 0 0.9rem;
}

.page-home .row-mark::before {
  content: "";
  width: 2.25rem;
  height: 1px;
  flex: none;
  background: var(--amber);
}

.page-home .row-mark .section__num {
  font-size: 1.5rem;
  line-height: 1;
  color: var(--amber);
  letter-spacing: 0.06em;
}

.page-home .section__title {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  line-height: 1.15;
  letter-spacing: -0.01em;
}

.page-home .home-note {
  margin: clamp(1.5rem, 3vw, 2.25rem) 0 0;
  padding-top: 1rem;
  border-top: 1px solid var(--line-soft);
  max-width: 52rem;
  font-size: 0.875rem;
  line-height: 1.85;
  color: var(--muted);
}

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

.page-home .figure__img,
.page-home .figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  object-fit: cover;
  background: var(--ink-800);
}

.page-home .figure__cap {
  margin-top: 0.65rem;
  font-size: 0.75rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ===== 首屏 ===== */
.page-home .hero {
  position: relative;
  padding: clamp(1.5rem, 3.5vw, 2.5rem) 0 clamp(2.5rem, 6vw, 4.5rem);
  border-bottom: var(--home-line);
  background:
    radial-gradient(120% 90% at 92% -10%, rgba(200, 150, 62, 0.15), rgba(200, 150, 62, 0) 58%),
    linear-gradient(180deg, rgba(23, 50, 74, 0.55), rgba(14, 34, 51, 0) 42%),
    var(--ink-900);
}

.page-home .hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2rem, 4vw, 3.25rem);
}

.page-home .hero__left,
.page-home .hero__right {
  min-width: 0;
}

.page-home .hero__head {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  margin: 0.75rem 0 0;
}

.page-home .hero__title {
  flex: 1 1 auto;
  min-width: 0;
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 7.4vw, 5rem);
  line-height: 1.02;
  letter-spacing: -0.025em;
}

.page-home .hero__note {
  display: none;
  align-self: stretch;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  color: var(--amber);
  border-left: 1px solid var(--line-amber);
  padding-left: 0.55rem;
  white-space: nowrap;
}

.page-home .hero__lede {
  margin: 1.25rem 0 0;
}

.page-home .hero__figure {
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
}

.page-home .hero__figure--tall {
  margin-top: 1rem;
}

/* 帮助索引 */
.page-home .help-index {
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
  padding: var(--home-card-pad);
  border: 1px solid var(--line-amber);
  border-radius: var(--radius);
  background: rgba(23, 50, 74, 0.74);
  backdrop-filter: blur(10px);
  box-shadow: 0 32px 60px -44px rgba(0, 0, 0, 0.95);
  transition: transform 240ms ease, box-shadow 240ms ease;
}

.page-home .help-index:hover {
  transform: translateY(-4px);
  box-shadow: 0 40px 70px -46px rgba(0, 0, 0, 1);
}

.page-home .help-index__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.5rem 1rem;
}

.page-home .help-index__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-home .help-index__hint {
  margin: 0;
  font-size: 0.8125rem;
  line-height: 1.6;
  color: var(--muted);
}

.page-home .help-index__field {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-top: 1rem;
  padding-bottom: 0.65rem;
  border-bottom: 1px solid var(--line);
}

.page-home .help-index__input {
  flex: 1 1 auto;
  min-width: 0;
  padding: 0.55rem 0;
  background: transparent;
  border: 0;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.5;
}

.page-home .help-index__input::placeholder {
  color: var(--muted);
}

.page-home .help-index__input:focus {
  outline: 1px solid var(--line-amber);
  outline-offset: 4px;
}

.page-home .help-index__count {
  flex: none;
  font-size: 0.75rem;
  color: var(--muted);
  letter-spacing: 0.04em;
}

.page-home .help-index__list {
  list-style: none;
  display: grid;
  gap: 1px;
  margin: 1rem 0 0;
  padding: 0;
  background: var(--line-soft);
}

.page-home .help-index__item {
  background: rgba(14, 34, 51, 0.86);
}

.page-home .help-index__item[hidden] {
  display: none;
}

.page-home .help-index__link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 0.85rem;
  padding: 0.85rem 0.6rem;
  color: var(--paper);
  text-decoration: none;
}

.page-home .help-index__link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 1px;
  background: var(--amber);
  transition: width 240ms ease;
}

.page-home .help-index__link:hover::after,
.page-home .help-index__link:focus-visible::after {
  width: 100%;
}

.page-home .help-index__num {
  flex: none;
  font-size: 0.75rem;
  color: var(--amber);
  letter-spacing: 0.08em;
}

.page-home .help-index__text {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 0.9375rem;
  line-height: 1.6;
  transition: color 200ms ease;
}

.page-home .help-index__link:hover .help-index__text,
.page-home .help-index__link:focus-visible .help-index__text {
  color: var(--amber-bright);
}

.page-home .help-index__tag {
  flex: none;
}

.page-home .help-index__empty {
  margin: 1rem 0 0;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--muted);
}

/* 首屏右栏 */
.page-home .hero__right {
  display: flex;
  flex-direction: column;
  gap: 1.15rem;
}

.page-home .hero__pulse {
  list-style: none;
  display: grid;
  gap: 0.9rem;
  margin: 0;
  padding: 0;
}

.page-home .hero__pulse li {
  position: relative;
  padding-left: 1.35rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgba(245, 241, 232, 0.86);
}

.page-home .hero__pulse li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--celadon);
  box-shadow: 0 0 0 4px rgba(79, 169, 140, 0.16);
}

.page-home .hero__cta {
  align-self: flex-start;
  margin-top: 0.25rem;
}

/* ===== 章节目录 ===== */
.page-home .chapter-toc {
  border-bottom: var(--home-line);
  background: rgba(23, 50, 74, 0.35);
}

.page-home .chapter-toc__inner {
  display: flex;
  gap: 0.25rem;
  overflow-x: auto;
  padding: 0.7rem 0;
  scrollbar-width: thin;
}

.page-home .chapter-toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.5rem;
  flex: none;
  padding: 0.5rem 0.75rem;
  font-size: 0.8125rem;
  line-height: 1.5;
  color: var(--muted);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 1px solid transparent;
  transition: color 200ms ease, border-color 200ms ease;
}

.page-home .chapter-toc__link .text-mono {
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--line);
}

.page-home .chapter-toc__link:hover,
.page-home .chapter-toc__link:focus-visible,
.page-home .chapter-toc__link[data-current] {
  color: var(--amber-bright);
  border-bottom-color: var(--amber);
}

.page-home .chapter-toc__link[data-current] .text-mono {
  color: var(--amber);
}

/* ===== 01 四类归档 ===== */
.page-home .cat-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  border: 1px solid var(--line-soft);
  background: var(--line-soft);
}

.page-home .cat-card {
  display: flex;
  flex-direction: column;
  gap: 0.7rem;
  padding: var(--home-card-pad);
  background: var(--ink-800);
}

.page-home .cat-card__num {
  margin: 0;
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--amber);
}

.page-home .cat-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.page-home .cat-card__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: rgba(245, 241, 232, 0.74);
}

.page-home .cat-card__link {
  align-self: flex-start;
  margin-top: auto;
  padding-bottom: 2px;
  font-size: 0.8125rem;
  color: var(--amber-bright);
  text-decoration: none;
  border-bottom: 1px solid var(--line-amber);
  transition: color 200ms ease, border-color 200ms ease;
}

.page-home .cat-card__link:hover,
.page-home .cat-card__link:focus-visible {
  color: var(--paper);
  border-color: var(--amber-bright);
}

/* ===== 02 时间轴 ===== */
.page-home .timeline-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin: 0 0 1.5rem;
  padding: 0;
  list-style: none;
  font-size: 0.8125rem;
  color: var(--muted);
}

.page-home .timeline-legend .legend__item {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}

.page-home .timeline-legend .legend__key {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex: none;
}

.page-home .timeline-legend .legend__key--open {
  background: var(--celadon);
}

.page-home .timeline-legend .legend__key--amber {
  background: var(--amber);
}

.page-home .timeline {
  position: relative;
  display: grid;
  gap: 0.9rem;
  margin-top: 0.5rem;
  padding-left: 1.75rem;
}

.page-home .timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 0.75rem;
  bottom: 0.75rem;
  width: 1px;
  background: linear-gradient(180deg, var(--amber) 0%, rgba(200, 150, 62, 0.12) 100%);
}

.page-home .timeline__item {
  position: relative;
  margin: 0;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--ink-800);
}

.page-home .timeline__item::before {
  content: "";
  position: absolute;
  left: -1.75rem;
  top: 1.3rem;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--celadon);
  box-shadow: 0 0 0 4px rgba(79, 169, 140, 0.14);
}

.page-home .timeline__head {
  margin: 0;
  font-size: 1rem;
}

.page-home .timeline__btn {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  width: 100%;
  padding: 1.05rem 1.15rem;
  background: transparent;
  border: 0;
  color: var(--paper);
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background 220ms ease;
}

.page-home .timeline__btn:hover,
.page-home .timeline__btn:focus-visible {
  background: rgba(200, 150, 62, 0.08);
}

.page-home .timeline__when {
  flex: none;
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-home .timeline__what {
  flex: 1 1 auto;
  min-width: 0;
  font-weight: 700;
  font-size: 0.9375rem;
  line-height: 1.6;
}

.page-home .timeline__icon {
  flex: none;
  position: relative;
  width: 14px;
  height: 14px;
}

.page-home .timeline__icon::before,
.page-home .timeline__icon::after {
  content: "";
  position: absolute;
  background: var(--amber);
}

.page-home .timeline__icon::before {
  left: 0;
  top: 6px;
  width: 14px;
  height: 1px;
}

.page-home .timeline__icon::after {
  left: 6px;
  top: 0;
  width: 1px;
  height: 14px;
  transition: transform 220ms ease, opacity 220ms ease;
}

.page-home .timeline__btn[aria-expanded="true"] .timeline__icon::after {
  transform: scaleY(0);
  opacity: 0;
}

.page-home .timeline__panel {
  padding: 0 1.15rem 1.15rem;
}

.page-home .timeline__panel[hidden] {
  display: none;
}

.page-home .timeline__body {
  margin: 0;
  padding-top: 0.9rem;
  border-top: 1px solid var(--line-soft);
  font-size: 0.9375rem;
  line-height: 1.9;
  color: rgba(245, 241, 232, 0.78);
}

/* ===== 03 三步开通 ===== */
.page-home .open-figure {
  margin-bottom: clamp(1.75rem, 3.5vw, 2.75rem);
}

.page-home .steps {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin: 0;
  padding: 0;
  counter-reset: step;
}

.page-home .step {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  padding: var(--home-card-pad);
  background: var(--ink-800);
  border: 1px solid var(--line-soft);
  border-top: 2px solid var(--amber);
  border-radius: var(--radius);
}

.page-home .step__num {
  margin: 0;
  font-size: 1.875rem;
  line-height: 1;
  color: var(--amber);
  letter-spacing: 0.06em;
}

.page-home .step__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.5;
}

.page-home .step__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: rgba(245, 241, 232, 0.76);
}

.page-home .materials {
  margin-top: clamp(1.5rem, 3vw, 2.25rem);
  padding: var(--home-card-pad);
  border-left: 3px solid var(--celadon);
  background: rgba(23, 50, 74, 0.55);
  border-radius: var(--radius);
}

.page-home .materials__title {
  margin: 0 0 0.75rem;
  font-size: 0.875rem;
  letter-spacing: 0.1em;
  color: var(--celadon);
}

.page-home .materials__list {
  list-style: none;
  display: grid;
  gap: 0.7rem;
  margin: 0;
  padding: 0;
}

.page-home .materials__list li {
  position: relative;
  padding-left: 1.1rem;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: rgba(245, 241, 232, 0.8);
}

.page-home .materials__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 6px;
  height: 1px;
  background: var(--amber);
}

/* ===== 04 两端一致 ===== */
.page-home .pair {
  align-items: start;
}

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

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

.page-home .pair__item {
  padding: 1.05rem 1.15rem;
  background: var(--ink-900);
}

.page-home .pair__key {
  margin: 0 0 0.4rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--amber);
}

.page-home .pair__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.9;
  color: rgba(245, 241, 232, 0.78);
}

/* ===== 05 接下来 ===== */
.page-home .next-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  border: 1px solid var(--line-soft);
  background: var(--line-soft);
}

.page-home .next-card {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  padding: var(--home-card-pad);
  background: var(--paper);
  color: var(--text-ink);
}

.page-home .next-card__kicker {
  margin: 0;
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: var(--amber-ink);
}

.page-home .next-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.125rem;
  font-weight: 700;
}

.page-home .next-card__text {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.85;
  color: rgba(27, 36, 48, 0.78);
}

.page-home .next-card__link {
  align-self: flex-start;
  margin-top: auto;
  padding-bottom: 2px;
  font-size: 0.8125rem;
  color: var(--amber-ink);
  text-decoration: none;
  border-bottom: 1px solid rgba(138, 95, 20, 0.4);
  transition: color 200ms ease, border-color 200ms ease;
}

.page-home .next-card__link:hover,
.page-home .next-card__link:focus-visible {
  color: var(--text-ink);
  border-color: var(--text-ink);
}

/* ===== 返回顶部 ===== */
.page-home .to-top {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  z-index: 40;
  padding: 0.65rem 1rem;
  background: rgba(23, 50, 74, 0.92);
  border: 1px solid var(--line-amber);
  border-radius: var(--radius);
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 0.8125rem;
  line-height: 1;
  cursor: pointer;
  backdrop-filter: blur(8px);
  transition: color 200ms ease, border-color 200ms ease;
}

.page-home .to-top:hover,
.page-home .to-top:focus-visible {
  color: var(--amber-bright);
  border-color: var(--amber-bright);
}

/* ===== 断点 ===== */
@media (min-width: 640px) {
  .page-home .cat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 768px) {
  .page-home .hero__note {
    display: block;
  }

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

  .page-home .pair {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  }
}

@media (min-width: 960px) {
  .page-home .hero__grid {
    grid-template-columns: 58fr 42fr;
    align-items: start;
  }

  .page-home .hero__right {
    padding-left: clamp(1.5rem, 2.2vw, 2.5rem);
    border-left: 1px solid var(--line-amber);
  }

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

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

  .page-home .to-top {
    right: 2rem;
    bottom: 2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .help-index,
  .page-home .help-index__link::after,
  .page-home .timeline__icon::after,
  .page-home .timeline__btn {
    transition: none;
  }

  .page-home .help-index:hover {
    transform: none;
  }
}