.page-home {
  --home-rule: rgba(198,210,222,.16);
  --home-cell: rgba(11,30,51,.45);
  background:
    radial-gradient(1100px 620px at 80% -12%, rgba(79,209,232,.10), transparent 60%),
    radial-gradient(820px 520px at 4% 6%, rgba(232,84,43,.10), transparent 64%),
    var(--ink-800);
  color: var(--paper);
  overflow-x: clip;
}

/* ===== 页面上下文 ===== */
.page-home > .breadcrumb {
  max-width: var(--max-w);
  margin-inline: auto;
  padding: 20px var(--gutter) 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
}
.page-home .breadcrumb a {
  color: var(--electric);
  text-decoration: none;
}
.page-home .breadcrumb a:hover {
  color: var(--gold-2);
}

/* ===== 首屏 ===== */
.page-home .hero {
  padding: clamp(22px, 3.4vw, 44px) 0 clamp(56px, 9vw, 104px);
}
.page-home .hero .split {
  display: grid;
  gap: clamp(30px, 5vw, 60px);
  align-items: start;
}
.page-home .hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(36px, 6.4vw, 66px);
  line-height: 1.06;
  letter-spacing: -.015em;
}
.page-home .hero__lead {
  margin: 18px 0 0;
  max-width: 32ch;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.78;
  color: var(--paper-dim);
}
.page-home .hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.page-home .hero__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px 18px;
  margin: 34px 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--home-rule);
}
.page-home .hero__facts div {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.page-home .hero__facts dt {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--slate);
}
.page-home .hero__facts dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--paper);
}
.page-home .hero__facts dd em {
  margin-left: 3px;
  font-style: normal;
  font-size: 12px;
  color: var(--slate);
}

/* 版本铭牌 */
.page-home .hero__visual {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
}
.page-home .plate-frame {
  justify-self: start;
  padding: 1px;
  background: conic-gradient(from 150deg, var(--gold-1), var(--gold-2) 26%, var(--cinnabar) 58%, var(--gold-1) 100%);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
  box-shadow: 0 16px 44px rgba(6,17,29,.5);
}
.page-home .plate-inner {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px clamp(20px, 3vw, 30px) 18px;
  background: var(--panel-grad);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}
.page-home .plate-label {
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--celadon);
}
.page-home .plate-ver {
  font-family: var(--font-mono);
  font-size: clamp(38px, 5vw, 54px);
  line-height: 1;
  color: var(--gold-2);
  text-shadow: 0 0 24px rgba(240,180,41,.26);
}
.page-home .plate-note {
  max-width: 32ch;
  font-size: 12.5px;
  line-height: 1.65;
  color: var(--paper-dim);
}

/* 栏目编号刻度 */
.page-home .ticks {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--home-rule);
  border: 1px solid var(--home-rule);
}
.page-home .ticks li {
  padding: 9px 2px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--paper-dim);
  background: rgba(6,17,29,.74);
}

.page-home .hero__media {
  margin: 0;
  aspect-ratio: 5 / 4;
  overflow: hidden;
  border: 1px solid var(--home-rule);
  clip-path: polygon(0 0, calc(100% - 26px) 0, 100% 26px, 100% 100%, 0 100%);
}
.page-home .hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ===== 通用区块 ===== */
.page-home .section {
  padding-block: clamp(56px, 8vw, 108px);
}
.page-home .band {
  background: linear-gradient(180deg, rgba(6,17,29,.86), rgba(11,30,51,.48) 46%, rgba(11,30,51,0));
}
.page-home .section-head {
  max-width: 62ch;
}
.page-home .section-head__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 3.6vw, 42px);
  line-height: 1.18;
  letter-spacing: -.01em;
}
.page-home .section-head__lead {
  margin: 16px 0 0;
  max-width: 48ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--paper-dim);
}

/* ===== 栏目索引 ===== */
.page-home .columns__figure {
  margin: clamp(28px, 4vw, 44px) 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border: 1px solid var(--home-rule);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}
.page-home .columns__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-home .index-grid {
  display: grid;
  grid-template-columns: 1fr;
  border-top: 1px solid var(--home-rule);
  border-left: 1px solid var(--home-rule);
}
.page-home .index-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 24px 22px 26px;
  border-right: 1px solid var(--home-rule);
  border-bottom: 1px solid var(--home-rule);
  background: var(--home-cell);
  color: inherit;
  text-decoration: none;
  transition: background .18s ease;
}
.page-home .index-card::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 2px;
  height: 0;
  background: var(--gold-grad);
  transition: height .2s ease;
}
.page-home .index-card:hover,
.page-home .index-card:focus-visible {
  background: var(--ink-700);
  outline: none;
}
.page-home .index-card:hover::after,
.page-home .index-card:focus-visible::after {
  height: 100%;
}
.page-home .index-card__no {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cinnabar);
}
.page-home .index-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.35;
}
.page-home .index-card__desc {
  font-size: 14px;
  line-height: 1.72;
  color: var(--paper-dim);
}
.page-home .index-card__sub {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed var(--home-rule);
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--slate);
}
.page-home .index-card:hover .index-card__sub,
.page-home .index-card:focus-visible .index-card__sub {
  color: var(--celadon);
}

/* ===== 版本时间线 ===== */
.page-home .version {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  margin-top: clamp(30px, 4vw, 50px);
}
.page-home .version__figure {
  margin: 0;
  aspect-ratio: 8 / 3;
  overflow: hidden;
  border: 1px solid var(--home-rule);
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%);
}
.page-home .version__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-home .timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 32px;
  list-style: none;
}
.page-home .timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold-2), rgba(201,138,22,.06));
}
.page-home .timeline__item {
  position: relative;
  padding-bottom: 30px;
}
.page-home .timeline__item:last-child {
  padding-bottom: 0;
}
.page-home .timeline__mark {
  position: absolute;
  left: -32px;
  top: 6px;
  width: 13px;
  height: 13px;
  background: var(--ink-700);
  border: 1px solid var(--gold-2);
  transform: rotate(45deg);
  transition: transform .18s ease, background .18s ease;
}
.page-home .timeline__item:hover .timeline__mark,
.page-home .timeline__item:focus-within .timeline__mark {
  background: var(--gold-2);
  transform: rotate(45deg) scale(1.18);
}
.page-home .timeline__ver {
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--gold-2);
}
.page-home .timeline__title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 700;
  line-height: 1.4;
}
.page-home .timeline__text {
  margin: 10px 0 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--paper-dim);
}
.page-home .timeline__more {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 12px 0 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate);
  transition: max-height .22s ease, opacity .22s ease;
}
.page-home .timeline__item:hover .timeline__more,
.page-home .timeline__item:focus-within .timeline__more {
  max-height: 90px;
  opacity: 1;
}
.page-home .version__cta {
  margin: clamp(26px, 3vw, 36px) 0 0;
}

/* ===== 升级前后对比 ===== */
.page-home .section--paper {
  background: var(--paper);
  color: var(--ink-800);
}
.page-home .section--paper .kicker {
  color: var(--cinnabar);
}
.page-home .section--paper .section-head__lead {
  color: var(--ink-500);
}
.page-home .compare {
  margin-top: clamp(28px, 4vw, 46px);
  border-top: 1px solid rgba(11,30,51,.16);
}
.page-home .compare__row {
  display: grid;
  gap: 14px;
  padding: 24px 0;
  border-bottom: 1px solid rgba(11,30,51,.16);
}
.page-home .compare__label {
  margin: 0;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink-800);
}
.page-home .compare__cell {
  padding-left: 14px;
  border-left: 2px solid rgba(11,30,51,.18);
}
.page-home .compare__cell--new {
  border-left-color: var(--cinnabar);
}
.page-home .compare__badge {
  display: block;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--slate-deep);
}
.page-home .compare__cell--new .compare__badge {
  color: var(--cinnabar);
}
.page-home .compare__cell p {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-500);
}
.page-home .compare__figure {
  margin: clamp(30px, 4vw, 48px) 0 0;
  aspect-ratio: 14 / 9;
  overflow: hidden;
  border: 1px solid rgba(11,30,51,.16);
}
.page-home .compare__figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ===== 分流与联系 ===== */
.page-home .section--deep {
  background: var(--ink-900);
}
.page-home .paths {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: clamp(28px, 4vw, 44px);
  background: var(--home-rule);
  border: 1px solid var(--home-rule);
}
.page-home .path {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 22px 28px;
  background: rgba(6,17,29,.74);
  color: inherit;
  text-decoration: none;
  transition: background .18s ease;
}
.page-home .path:hover,
.page-home .path:focus-visible {
  background: var(--ink-700);
  outline: none;
}
.page-home .path__no {
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--celadon);
}
.page-home .path__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
}
.page-home .path__desc {
  font-size: 14px;
  line-height: 1.72;
  color: var(--paper-dim);
}
.page-home .path__go {
  margin-top: auto;
  padding-top: 12px;
  font-size: 13px;
  color: var(--gold-2);
}
.page-home .contact-line {
  margin: clamp(26px, 3vw, 38px) 0 0;
  font-size: 14px;
  line-height: 1.95;
  color: var(--paper-dim);
}
.page-home .contact-line .mono {
  color: var(--paper);
}
.page-home .contact-actions {
  margin: 18px 0 0;
}

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

@media (min-width: 800px) {
  .page-home .paths {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-home .hero .split {
    grid-template-columns: 5fr 7fr;
  }
  .page-home .compare__row {
    grid-template-columns: 190px minmax(0, 1fr) minmax(0, 1fr);
    gap: 30px;
    align-items: start;
  }
}

@media (min-width: 980px) {
  .page-home .version {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }
  .page-home .version__figure {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

@media (min-width: 1080px) {
  .page-home .index-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 979px) {
  .page-home .timeline__more {
    max-height: none;
    opacity: 1;
  }
}

@media (max-width: 560px) {
  .page-home .hero__facts dd {
    font-size: 19px;
  }
  .page-home .ticks li {
    font-size: 10px;
    padding: 8px 1px;
  }
  .page-home .contact-line {
    font-size: 13px;
  }
}