.page-home {
  --home-pad-top: 5.5rem;
  --home-section-pad: 4.5rem;
  display: block;
  background: var(--paper);
  color: var(--ink-900);
}

/* ---------- 共享语汇的页面级微调 ---------- */
.page-home .block-head {
  max-width: 46rem;
  margin-bottom: 2rem;
}

.page-home .block-kicker {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: .1em;
  color: var(--signal);
  margin: 0 0 .7rem;
}

.page-home .block-head h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-h2);
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 0 0 .9rem;
}

.page-home .block-lede {
  margin: 0;
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--gray-500);
}

/* ---------- 首屏 ---------- */
.page-home .hero {
  padding: var(--home-pad-top) 0 0;
  overflow-x: clip;
}

.page-home .hero__grid {
  display: grid;
  gap: 2.5rem;
}

.page-home .hero__eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: .08em;
  color: var(--gray-500);
  margin: 0 0 1.1rem;
}

.page-home .hero h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-hero);
  line-height: 1.05;
  letter-spacing: -0.015em;
  margin: 0 0 1.25rem;
  text-wrap: balance;
}

.page-home .hero h1 em {
  display: block;
  font-style: normal;
  background-image: linear-gradient(transparent 64%, rgba(255, 90, 31, .3) 64%);
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

.page-home .hero__intro {
  max-width: 36rem;
  margin: 0 0 2rem;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--gray-500);
}

.page-home .hero__paths {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--gray-300);
}

.page-home .hero__paths li {
  border-bottom: 1px solid var(--gray-300);
}

.page-home .hero__paths a {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas:
    "num text"
    ". note";
  gap: .2rem .8rem;
  align-items: baseline;
  padding: .9rem .2rem;
  text-decoration: none;
  color: var(--ink-900);
  transition: color var(--t-fast) var(--ease), padding-left var(--t-fast) var(--ease);
}

.page-home .hero__paths a:hover,
.page-home .hero__paths a:focus-visible {
  color: var(--signal);
  padding-left: .7rem;
}

.page-home .path-num {
  grid-area: num;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  color: var(--gray-500);
}

.page-home .path-text {
  grid-area: text;
  font-weight: 600;
  font-size: 1rem;
}

.page-home .path-note {
  grid-area: note;
  font-size: var(--fs-small);
  color: var(--gray-500);
}

.page-home .hero__cut {
  position: relative;
  padding-left: 14px;
  margin: 0;
}

.page-home .hero__cut .media-frame {
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--gray-100);
}

.page-home .hero__cut::before,
.page-home .hero__cut::after {
  content: "";
  position: absolute;
  left: 0;
  width: 4px;
  border-radius: 2px;
}

.page-home .hero__cut::before {
  top: 0;
  height: 50%;
  background: var(--volt);
}

.page-home .hero__cut::after {
  top: 54%;
  height: 46%;
  background: var(--legacy);
}

/* ---------- 章节刻度带 ---------- */
.page-home .section-scale {
  margin-top: 3.5rem;
  border-top: 1px solid var(--gray-300);
}

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

.page-home .section-scale__item {
  display: flex;
  align-items: baseline;
  gap: .55rem;
  padding: .9rem .4rem .9rem 0;
  border-bottom: 1px solid var(--gray-300);
  text-decoration: none;
  color: var(--gray-500);
  font-size: var(--fs-small);
  transition: color var(--t-fast) var(--ease);
}

.page-home .section-scale__item:hover,
.page-home .section-scale__item:focus-visible {
  color: var(--signal);
}

.page-home .section-scale__num {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: .06em;
  color: var(--ink-900);
}

.page-home .section-scale__item:hover .section-scale__num,
.page-home .section-scale__item:focus-visible .section-scale__num {
  color: var(--signal);
}

/* ---------- 第二栏：两条入口 ---------- */
.page-home .entry {
  padding: var(--home-section-pad) 0;
}

.page-home .entry__strip {
  margin: 0 0 1.75rem;
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--gray-100);
  border: 1px solid var(--gray-300);
}

.page-home .entry__cards {
  gap: 1.25rem;
}

.page-home .entry-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .85rem;
  padding: 1.9rem 1.5rem 1.5rem;
  background: var(--paper);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-m);
  overflow: hidden;
  transition: border-color var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

.page-home .entry-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
}

.page-home .entry-card--volt::before {
  background: var(--volt);
}

.page-home .entry-card--legacy::before {
  background: var(--legacy);
}

.page-home .entry-card:hover {
  border-color: var(--signal);
  transform: translateY(-2px);
}

.page-home .entry-card:focus-within {
  border-color: var(--signal);
}

.page-home .entry-card__title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: var(--fs-h3);
  margin: 0;
}

.page-home .entry-card__desc {
  margin: 0;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--gray-500);
}

.page-home .entry-card__meta {
  list-style: none;
  margin: 0;
  padding: .85rem 0 0;
  border-top: 1px dashed var(--gray-300);
  display: grid;
  gap: .45rem;
}

.page-home .entry-card__meta li {
  display: flex;
  gap: .6rem;
  font-size: var(--fs-small);
  color: var(--gray-500);
  line-height: 1.6;
}

.page-home .entry-card__meta span {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: .04em;
  color: var(--ink-900);
}

.page-home .entry-card__foot {
  margin-top: auto;
  padding-top: 1rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .85rem;
}

.page-home .entry-card__cue {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: .04em;
  color: var(--gray-500);
  transition: opacity var(--t-fast) var(--ease), transform var(--t-fast) var(--ease);
}

/* ---------- 双版本对照 ---------- */
.page-home .compare {
  background: var(--ink-900);
  color: var(--paper);
  padding: var(--home-section-pad) 0;
}

.page-home .compare .block-kicker {
  color: var(--signal);
}

.page-home .compare h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-h2);
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 0 0 1rem;
  color: var(--paper);
}

.page-home .compare__grid {
  display: grid;
  gap: 2.5rem;
}

.page-home .compare__lede {
  margin: 0 0 1.75rem;
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--gray-300);
}

.page-home .compare__points {
  list-style: none;
  margin: 0 0 2rem;
  padding: 0;
  border-top: 1px solid rgba(255, 255, 255, .16);
}

.page-home .compare__points li {
  padding: .9rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, .16);
  font-size: var(--fs-small);
  line-height: 1.7;
  color: var(--gray-300);
}

.page-home .compare__key {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: .06em;
  color: var(--paper);
  margin-bottom: .25rem;
}

.page-home .compare__panes {
  display: grid;
  gap: 1rem;
}

.page-home .pane {
  padding: 1.4rem 1.35rem;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: var(--radius-m);
  background: rgba(255, 255, 255, .04);
}

.page-home .pane--volt {
  border-top: 3px solid var(--volt);
}

.page-home .pane--legacy {
  border-top: 3px solid var(--legacy);
}

.page-home .pane__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: .08em;
  color: var(--paper);
  border-bottom: 1px solid var(--gray-500);
  padding-bottom: .2rem;
  margin-bottom: 1rem;
}

.page-home .pane__bars {
  display: grid;
  gap: .5rem;
  margin-bottom: 1rem;
}

.page-home .pane__bar {
  display: block;
  height: 8px;
  border-radius: 4px;
  background: rgba(255, 255, 255, .16);
}

.page-home .pane__bar--wide {
  width: 100%;
}

.page-home .pane__bar--short {
  width: 46%;
}

.page-home .pane--volt .pane__bar:first-child {
  background: rgba(45, 107, 255, .85);
}

.page-home .pane--legacy .pane__bar:nth-child(2) {
  background: rgba(15, 118, 110, .9);
}

.page-home .pane__caption {
  margin: 0;
  font-size: var(--fs-small);
  line-height: 1.7;
  color: var(--gray-300);
}

.page-home .compare .btn-outline {
  border-color: var(--gray-300);
  color: var(--paper);
}

.page-home .compare .btn-outline:hover,
.page-home .compare .btn-outline:focus-visible {
  border-color: var(--signal);
  color: var(--signal);
}

/* ---------- 老用户入口 ---------- */
.page-home .legacy {
  background: var(--gray-100);
  padding: var(--home-section-pad) 0;
}

.page-home .legacy__grid {
  display: grid;
  gap: 2.25rem;
}

.page-home .legacy__text h2 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--fs-h2);
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 0 0 1rem;
}

.page-home .legacy__text p {
  margin: 0 0 1rem;
  font-size: var(--fs-body);
  line-height: 1.8;
  color: var(--gray-500);
  max-width: 34rem;
}

.page-home .legacy__mono {
  display: inline-block;
  margin: .5rem 0 1.75rem;
  padding: .6rem .9rem;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: .06em;
  color: var(--legacy);
  background: var(--paper);
  border: 1px dashed var(--legacy);
  border-radius: var(--radius-s);
}

.page-home .legacy__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
}

.page-home .legacy__actions .btn-outline {
  border-color: var(--ink-900);
  color: var(--ink-900);
}

.page-home .legacy__actions .btn-outline:hover,
.page-home .legacy__actions .btn-outline:focus-visible {
  border-color: var(--signal);
  color: var(--signal);
}

.page-home .legacy__figure {
  margin: 0;
  border-radius: var(--radius-m);
  overflow: hidden;
  border: 1px solid var(--gray-300);
  background: var(--paper);
}

/* ---------- 四条能力线 ---------- */
.page-home .capability {
  padding: var(--home-section-pad) 0;
}

.page-home .bento {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
}

.page-home .bento__cell {
  display: flex;
  flex-direction: column;
  gap: .8rem;
  padding: 1.75rem 1.5rem;
  background: var(--paper);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-m);
}

.page-home .bento__cell h3 {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: var(--fs-h3);
  line-height: 1.35;
  margin: 0;
}

.page-home .bento__cell p {
  margin: 0;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--gray-500);
}

.page-home .bento__cell .tag {
  align-self: flex-start;
}

.page-home .bento__cell--dark {
  background: var(--ink-700);
  border-color: var(--ink-700);
  color: var(--paper);
}

.page-home .bento__cell--dark p {
  color: var(--gray-300);
}

.page-home .bento__facts {
  list-style: none;
  margin: auto 0 0;
  padding: 1rem 0 0;
  border-top: 1px dashed var(--gray-300);
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.page-home .bento__facts li {
  font-size: var(--fs-small);
  color: var(--gray-500);
}

.page-home .bento__facts strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--ink-900);
  line-height: 1.2;
}

.page-home .capability__strip {
  margin: 1.5rem 0 0;
  display: grid;
  gap: 1rem;
  align-items: center;
}

.page-home .capability__strip .media-frame {
  border-radius: var(--radius-m);
  overflow: hidden;
  border: 1px solid var(--gray-300);
  background: var(--gray-100);
}

.page-home .capability__strip figcaption {
  font-size: var(--fs-small);
  line-height: 1.75;
  color: var(--gray-500);
}

/* ---------- 近期更新 ---------- */
.page-home .updates {
  padding: var(--home-section-pad) 0;
  background: var(--gray-100);
}

.page-home .updates__grid {
  display: grid;
  gap: 2rem;
}

.page-home .updates__col-title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: .02em;
  margin: 0 0 .75rem;
  padding-left: .8rem;
  border-left: 3px solid var(--signal);
}

.page-home .update-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--gray-300);
}

.page-home .update-list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .2rem;
  padding: .9rem 0;
  border-bottom: 1px solid var(--gray-300);
  font-size: var(--fs-small);
  line-height: 1.7;
  color: var(--ink-900);
}

.page-home .update-list__time {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: .04em;
  color: var(--signal);
}

.page-home .updates__more {
  margin: 2rem 0 0;
}

.page-home .updates__more .btn-outline {
  border-color: var(--ink-900);
  color: var(--ink-900);
}

.page-home .updates__more .btn-outline:hover,
.page-home .updates__more .btn-outline:focus-visible {
  border-color: var(--signal);
  color: var(--signal);
}

/* ---------- 高频问题 ---------- */
.page-home .faq {
  padding: var(--home-section-pad) 0 calc(var(--home-section-pad) + 1.5rem);
  background: var(--paper);
}

.page-home .faq__list {
  display: grid;
  gap: .75rem;
  max-width: 54rem;
}

.page-home .faq-item {
  background: var(--paper);
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-m);
  overflow: hidden;
  transition: border-color var(--t-fast) var(--ease);
}

.page-home .faq-item[open] {
  border-color: var(--signal);
}

.page-home .faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.15rem 1.35rem;
  cursor: pointer;
  list-style: none;
  font-weight: 600;
  font-size: 1rem;
  line-height: 1.55;
}

.page-home .faq-item summary::-webkit-details-marker {
  display: none;
}

.page-home .faq-item summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 1.35rem;
  line-height: 1;
  color: var(--signal);
}

.page-home .faq-item[open] summary::after {
  content: "−";
}

.page-home .faq-item p {
  margin: 0;
  padding: 0 1.35rem 1.35rem;
  font-size: var(--fs-small);
  line-height: 1.85;
  color: var(--gray-500);
}

.page-home .faq__more {
  max-width: 54rem;
  margin: 1.75rem 0 0;
  font-size: var(--fs-small);
  line-height: 1.85;
  color: var(--gray-500);
}

.page-home .faq__more a {
  color: var(--volt);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-home .faq__more a:hover,
.page-home .faq__more a:focus-visible {
  color: var(--signal);
}

/* ---------- 平板 ---------- */
@media (min-width: 720px) {
  .page-home .section-scale__track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-home .bento__cell--a,
  .page-home .bento__cell--d {
    grid-column: span 2;
  }

  .page-home .updates__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2.5rem;
  }

  .page-home .capability__strip {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
    gap: 2rem;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-home .hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 3.5rem;
    align-items: start;
  }

  .page-home .hero__paths a {
    grid-template-columns: auto minmax(0, 1fr) auto;
    grid-template-areas: "num text note";
    align-items: baseline;
    padding-right: .25rem;
  }

  .page-home .path-note {
    text-align: right;
  }

  .page-home .compare__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 4rem;
    align-items: start;
  }

  .page-home .compare__panes {
    grid-template-columns: minmax(0, 1fr);
    gap: 1.25rem;
  }

  .page-home .legacy__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    gap: 3.5rem;
    align-items: center;
  }

  .page-home .entry-card__cue {
    opacity: 0;
    transform: translateX(-6px);
  }

  .page-home .entry-card:hover .entry-card__cue,
  .page-home .entry-card:focus-within .entry-card__cue {
    opacity: 1;
    transform: translateX(0);
  }
}

@media (min-width: 1040px) {
  .page-home .section-scale__track {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-home .section-scale__item {
    padding-right: 1rem;
  }

  .page-home .bento {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-home .bento__cell--a {
    grid-column: span 4;
  }

  .page-home .bento__cell--b {
    grid-column: span 2;
  }

  .page-home .bento__cell--c {
    grid-column: span 2;
  }

  .page-home .bento__cell--d {
    grid-column: span 4;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-home .entry-card,
  .page-home .hero__paths a,
  .page-home .section-scale__item,
  .page-home .entry-card__cue,
  .page-home .faq-item {
    transition: none;
  }

  .page-home .entry-card:hover {
    transform: none;
  }
}