.page-home {
  --step-num-w: clamp(52px, 9vw, 96px);
  --card-pad: clamp(16px, 2.2vw, 26px);
  --sec-gap: clamp(36px, 5.5vw, 76px);
  --step-gap: clamp(10px, 1.4vw, 16px);
}

.page-home .breadcrumb {
  margin: clamp(12px, 2vw, 22px) 0 clamp(10px, 1.6vw, 18px);
}

/* ---------- 首屏封面 ---------- */
.page-home .hero {
  position: relative;
  overflow: hidden;
  border: var(--line-thick);
  background: var(--ink-900);
  box-shadow: var(--shadow-hard);
}

.page-home .hero__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.18;
  filter: saturate(0.7) contrast(1.05);
  pointer-events: none;
}

.page-home .hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(6, 15, 24, 0.97) 0%, rgba(6, 15, 24, 0.88) 42%, rgba(11, 27, 43, 0.5) 100%);
  pointer-events: none;
}

.page-home .hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  padding: clamp(20px, 3vw, 40px) clamp(14px, 2.6vw, 34px) clamp(22px, 3vw, 40px);
}

.page-home .hero__title {
  margin: 0 0 clamp(10px, 1.4vw, 16px);
  font-family: var(--font-display);
  font-size: clamp(27px, 5vw, 52px);
  line-height: 1.14;
  letter-spacing: 0.05em;
  color: var(--paper-050);
}

.page-home .hero__lead {
  margin: 0;
  max-width: 48ch;
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.8;
  color: var(--slate-400);
}

/* ---------- 四步主轴 ---------- */
.page-home .steps {
  list-style: none;
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: var(--step-gap);
}

.page-home .step {
  position: relative;
  display: grid;
  grid-template-columns: var(--step-num-w) minmax(0, 1fr);
  gap: clamp(10px, 1.6vw, 18px);
  align-items: start;
  padding: clamp(10px, 1.4vw, 16px) clamp(12px, 1.6vw, 18px);
  background: rgba(16, 38, 58, 0.72);
  border: var(--line);
  border-left: 2px solid rgba(43, 227, 201, 0.4);
  transition: background 0.18s ease, border-color 0.18s ease, transform 0.18s ease;
}

.page-home .step:hover,
.page-home .step:focus-within {
  background: var(--panel-700);
  border-color: var(--line-600);
  border-left-color: var(--cyan-400);
  transform: translateY(-2px);
}

.page-home .step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: calc(clamp(12px, 1.6vw, 18px) + var(--step-num-w) / 2);
  top: 74%;
  bottom: calc(-1 * var(--step-gap) + 2px);
  width: 1px;
  background: linear-gradient(180deg, var(--cyan-400), rgba(43, 227, 201, 0));
  opacity: 0.55;
}

.page-home .step__num {
  font-size: clamp(38px, 7.6vw, 86px);
  line-height: 0.82;
  letter-spacing: -0.03em;
  color: var(--cyan-400);
  display: block;
}

.page-home .step__title {
  margin: 0 0 4px;
  font-family: var(--font-display);
  font-size: clamp(16px, 1.5vw, 20px);
  letter-spacing: 0.04em;
  color: var(--paper-050);
}

.page-home .step__action {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper-050);
}

.page-home .step__note {
  margin: 4px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-400);
}

.page-home .step__extra {
  margin: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--cyan-200);
  transition: max-height 0.18s ease, opacity 0.18s ease, margin 0.18s ease;
}

.page-home .step:hover .step__extra,
.page-home .step:focus-within .step__extra {
  max-height: 120px;
  opacity: 1;
  margin-top: 8px;
  padding-left: 10px;
  border-left: 2px solid var(--cyan-400);
}

/* ---------- 版本卡 ---------- */
.page-home .hero__side {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
  align-content: start;
}

.page-home .vcard {
  position: relative;
  padding: var(--card-pad);
  background: var(--panel-700);
  border: var(--line-thick);
  box-shadow: var(--shadow-hard);
}

.page-home .vcard__top {
  display: grid;
  gap: 10px;
}

.page-home .vcard__label {
  margin: 0;
  color: var(--slate-400);
}

.page-home .vcard__tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.page-home .vcard__note {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-400);
}

.page-home .vcard__stats {
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  border-top: 1px solid var(--line-600);
  padding-top: 14px;
}

.page-home .vcard__stat dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--slate-400);
}

.page-home .vcard__stat dd {
  margin: 6px 0 0;
  font-size: 14px;
  color: var(--amber-400);
}

.page-home .vcard__hist {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-home .vcard__row {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 10px;
  align-items: baseline;
  padding: 8px 0;
  font-size: 12px;
  border-top: 1px solid var(--line-600);
}

.page-home .vcard__ver {
  color: var(--cyan-400);
}

.page-home .vcard__stage {
  color: var(--slate-400);
}

.page-home .vcard__date {
  color: var(--amber-400);
}

.page-home .vcard .btn {
  margin-top: 16px;
}

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

/* ---------- 章节骨架 ---------- */
.page-home .sec {
  padding-block: var(--sec-gap);
  border-top: 1px solid var(--line-600);
  margin-top: var(--sec-gap);
}

.page-home .sec:first-of-type {
  margin-top: clamp(24px, 4vw, 44px);
}

.page-home .sec__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: clamp(12px, 2vw, 24px);
  align-items: start;
  margin-bottom: clamp(18px, 2.6vw, 30px);
}

.page-home .sec__head h2 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(21px, 2.8vw, 32px);
  letter-spacing: 0.05em;
  color: var(--paper-050);
}

.page-home .sec__sub {
  margin: 0;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--slate-400);
}

/* ---------- 横向更新条带 ---------- */
.page-home .strip-wrap {
  position: relative;
}

.page-home .strip-wrap::after {
  content: "";
  display: block;
  height: 8px;
  margin-top: 12px;
  background-image: repeating-linear-gradient(90deg, var(--line-600) 0 1px, transparent 1px 22px);
}

.page-home .strip {
  list-style: none;
  margin: 0;
  padding: 0 0 4px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(210px, 78%);
  gap: clamp(10px, 1.6vw, 16px);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-home .strip__card {
  scroll-snap-align: start;
  display: grid;
  gap: 8px;
  padding: 16px 18px;
  background: var(--panel-700);
  border: var(--line);
  border-top: 2px solid var(--cyan-400);
}

.page-home .strip__name {
  font-family: var(--font-display);
  font-size: 17px;
  letter-spacing: 0.05em;
  color: var(--paper-050);
}

.page-home .strip__date {
  font-size: 12px;
  color: var(--amber-400);
}

.page-home .strip__card .tag {
  justify-self: start;
}

/* ---------- 双端对照 ---------- */
.page-home .cmp {
  display: grid;
  gap: clamp(18px, 2.6vw, 30px);
}

.page-home .cmp__col {
  padding: clamp(16px, 2.2vw, 26px);
  border: var(--line);
  background: rgba(16, 38, 58, 0.5);
}

.page-home .cmp__col--alt {
  background: rgba(15, 61, 62, 0.4);
  border-color: var(--teal-line);
  border-left: 2px solid var(--cyan-400);
}

.page-home .cmp__col h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(17px, 1.7vw, 21px);
  letter-spacing: 0.05em;
  color: var(--paper-050);
}

.page-home .cmp__col p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--slate-400);
}

.page-home .cmp__col .figure {
  margin: 0 0 16px;
}

.page-home .cmp__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-home .cmp__list li {
  position: relative;
  padding-left: 18px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--paper-050);
}

.page-home .cmp__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 2px;
  background: var(--cyan-400);
}

.page-home .mini {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-home .mini__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  padding: 10px 12px;
  background: var(--ink-800);
  border: 1px solid var(--teal-line);
  font-size: 14px;
  color: var(--paper-050);
}

.page-home .mini__num {
  font-size: 13px;
  color: var(--cyan-400);
}

.page-home .cmp__col .btn {
  margin-top: 14px;
}

.page-home .flow {
  margin: clamp(18px, 2.6vw, 28px) 0 0;
}

/* ---------- 资料库入口 ---------- */
.page-home .entries {
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
}

.page-home .entry__facts {
  margin: 16px 0;
  padding: 14px 0 0;
  display: grid;
  gap: 10px;
  border-top: 1px solid rgba(233, 240, 246, 0.18);
}

.page-home .entry__facts > div {
  display: grid;
  grid-template-columns: 86px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
}

.page-home .entry__facts dt {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--cyan-200);
}

.page-home .entry__facts dd {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--paper-050);
}

.page-home .entry__facts dd.mono {
  color: var(--amber-400);
  font-size: 14px;
}

/* ---------- 疑问分流 ---------- */
.page-home .help {
  display: grid;
  gap: clamp(18px, 2.6vw, 30px);
}

.page-home .help__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-home .help__item {
  display: grid;
  gap: 6px;
  padding: 16px 18px;
  background: var(--panel-700);
  border-left: 2px solid var(--line-600);
  transition: border-color 0.18s ease, background 0.18s ease;
}

.page-home .help__item:hover,
.page-home .help__item:focus-within {
  border-left-color: var(--amber-400);
  background: var(--ink-800);
}

.page-home .help__item a {
  font-family: var(--font-display);
  font-size: 16.5px;
  letter-spacing: 0.04em;
  color: var(--paper-050);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-400);
  justify-self: start;
  padding-bottom: 2px;
}

.page-home .help__item a:hover,
.page-home .help__item a:focus-visible {
  color: var(--cyan-200);
}

.page-home .help__item span {
  font-size: 13px;
  line-height: 1.7;
  color: var(--slate-400);
}

.page-home .help__cta {
  padding: clamp(18px, 2.4vw, 28px);
  background: var(--ink-900);
  border: var(--line-thick);
  border-top: 3px solid var(--amber-400);
  box-shadow: var(--shadow-hard);
}

.page-home .help__cta h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(17px, 1.7vw, 21px);
  letter-spacing: 0.05em;
  color: var(--paper-050);
}

.page-home .help__cta p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--slate-400);
}

.page-home .help__cta .btn {
  margin-top: 6px;
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 720px) {
  .page-home .strip {
    grid-auto-columns: minmax(200px, 32%);
  }

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

  .page-home .help {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-home .hero__grid {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-home .cmp {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-home .flow .figure__media {
    max-height: 340px;
  }

  .page-home .flow .figure__img {
    object-fit: cover;
  }
}

@media (min-width: 1180px) {
  .page-home .strip {
    grid-auto-columns: minmax(200px, 1fr);
    grid-auto-flow: column;
  }
}

@media (hover: none) {
  .page-home .step__extra {
    max-height: none;
    opacity: 1;
    margin-top: 8px;
    padding-left: 10px;
    border-left: 2px solid rgba(43, 227, 201, 0.6);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .step,
  .page-home .step__extra,
  .page-home .help__item {
    transition: none;
  }

  .page-home .step:hover,
  .page-home .step:focus-within {
    transform: none;
  }
}
<<<END>>>