.page-home {
  --home-gap: clamp(22px, 3.4vw, 40px);
  display: block;
  background: var(--c-gravel);
  color: var(--c-deep);
  overflow-x: hidden;
}

.page-home .section {
  padding-block: clamp(46px, 7vw, 86px);
}

.page-home .section--tight {
  padding-block: clamp(30px, 4.4vw, 56px);
}

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

/* ---------- 首屏 ---------- */

.page-home .home-hero {
  position: relative;
  color: var(--c-fog);
  background-color: var(--c-blue);
  background-image: linear-gradient(158deg, #0E3A5C 0%, #0A2C46 60%, #072033 100%);
  padding-top: calc(var(--header-h) + 38px);
  padding-bottom: clamp(40px, 6vw, 76px);
  overflow: hidden;
}

.page-home .home-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(115deg, rgba(31, 199, 182, 0.14) 0 2px, transparent 2px 92px);
  pointer-events: none;
}

.page-home .home-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--home-gap);
}

.page-home .home-hero h1 {
  margin: 16px 0 0;
  font-size: var(--fs-4);
  font-weight: 800;
  line-height: 1.12;
  letter-spacing: -0.02em;
}

.page-home .home-lede {
  margin: 18px 0 0;
  max-width: 37ch;
  font-size: var(--fs-1);
  line-height: 1.75;
  color: var(--c-line);
}

.page-home .home-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-home .home-hero__viz {
  position: relative;
  border: var(--edge);
  box-shadow: var(--hard);
  background: var(--c-ink);
  overflow: hidden;
}

.page-home .home-hero__viz img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 8 / 5;
  object-fit: cover;
  filter: saturate(0.78) contrast(1.08) brightness(0.86);
}

.page-home .home-hero__ruler {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: 46px;
  display: block;
}

.page-home .home-hero__ruler .ruler-fill {
  fill: url(#homeRulerTicks);
}

.page-home .home-hero__ruler .ruler-base {
  stroke: var(--c-volt);
  stroke-width: 2;
}

.page-home .home-hero__ruler .tick--minor {
  stroke: var(--c-line);
  stroke-width: 1;
  opacity: 0.7;
}

.page-home .home-hero__ruler .tick--major {
  stroke: var(--c-volt);
  stroke-width: 2;
}

@media (min-width: 900px) {
  .page-home .home-hero__grid {
    grid-template-columns: 5fr 7fr;
    align-items: center;
    gap: clamp(32px, 5vw, 64px);
  }

  .page-home .home-hero h1 {
    font-size: var(--fs-5);
  }
}

/* ---------- 三层预览 ---------- */

.page-home .home-preview {
  background: var(--c-gravel);
}

.page-home .home-preview .section-head {
  margin-bottom: 24px;
}

.page-home .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.page-home .tabs__btn {
  appearance: none;
  border: 2px solid var(--c-deep);
  background: var(--c-fog);
  color: var(--c-deep);
  font: inherit;
  font-weight: 700;
  font-size: var(--fs-1);
  padding: 10px 18px;
  cursor: pointer;
  box-shadow: var(--hard-sm);
  transition: transform 140ms ease, background-color 140ms ease;
}

.page-home .tabs__btn:hover {
  transform: translate(-1px, -1px);
}

.page-home .tabs__btn[aria-selected="true"] {
  background: var(--c-volt);
}

.page-home .tabs__btn:focus-visible {
  outline: 3px solid var(--c-blue);
  outline-offset: 2px;
}

.page-home .tabs__panel {
  background: var(--c-fog);
  border: var(--edge);
  box-shadow: var(--hard-sm);
  padding: 6px 0;
}

.page-home .tabs__panel .ledger__row {
  border-bottom: 1px solid var(--c-line);
}

.page-home .tabs__panel .ledger__row:last-child {
  border-bottom: 0;
}

.page-home .ledger__title {
  font-size: var(--fs-2);
  font-weight: 800;
  letter-spacing: -0.01em;
  margin: 0;
}

.page-home .ledger__meta {
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-steel);
}

.page-home .ledger__num {
  font-size: var(--fs-2);
  font-weight: 700;
  color: var(--c-blue);
}

.page-home .home-preview__more {
  margin: 24px 0 0;
}

/* ---------- 四条赛道 ---------- */

.page-home .home-lanes {
  background: var(--c-fog);
  border-top: 2px solid var(--c-deep);
  border-bottom: 2px solid var(--c-deep);
}

.page-home .home-lanes__grid {
  display: grid;
  gap: 28px;
  margin-top: 24px;
}

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

.page-home .lane {
  position: relative;
  background: var(--c-gravel);
  border: var(--edge);
  border-left: 8px solid var(--c-blue);
  padding: 16px 18px 18px;
  box-shadow: var(--hard-sm);
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.page-home .lane::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 4px;
  background: var(--c-volt);
  transition: width 220ms ease;
}

.page-home .lane:hover,
.page-home .lane:focus-within {
  transform: translate(-2px, -2px);
  box-shadow: 5px 5px 0 var(--c-deep);
}

.page-home .lane:hover::after,
.page-home .lane:focus-within::after {
  width: 100%;
}

.page-home .lane__num {
  display: inline-block;
  background: var(--c-blue);
  color: var(--c-fog);
  font-size: 13px;
  letter-spacing: 0.08em;
  padding: 3px 9px;
}

.page-home .lane__title {
  margin: 12px 0 0;
  font-size: var(--fs-2);
  font-weight: 800;
  letter-spacing: -0.01em;
}

.page-home .lane__text {
  margin: 8px 0 0;
  max-width: 40ch;
  font-size: var(--fs-1);
  line-height: 1.7;
  color: var(--c-steel);
}

.page-home .lane__link {
  display: inline-block;
  margin-top: 12px;
  font-weight: 700;
  color: var(--c-deep);
  text-decoration: none;
  border-bottom: 2px solid var(--c-volt);
  padding-bottom: 2px;
}

.page-home .lane__link:hover {
  color: var(--c-blue);
}

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

.page-home .figure__media {
  border: var(--edge);
  box-shadow: var(--hard-sm);
  overflow: hidden;
}

.page-home .figure__media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-home .figure__cap {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--c-steel);
}

@media (min-width: 760px) {
  .page-home .lane:nth-child(2) {
    margin-left: 26px;
  }

  .page-home .lane:nth-child(3) {
    margin-left: 52px;
  }

  .page-home .lane:nth-child(4) {
    margin-left: 78px;
  }
}

@media (min-width: 900px) {
  .page-home .home-lanes__grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
    gap: 44px;
  }

  .page-home .home-lanes__figure {
    margin-top: 18px;
  }
}

/* ---------- 移动端视图 ---------- */

.page-home .home-mobile {
  background: var(--c-gravel);
}

.page-home .home-mobile__grid {
  display: grid;
  gap: 28px;
}

.page-home .home-mobile__body h2 {
  margin: 12px 0 0;
  font-size: var(--fs-3);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.page-home .home-mobile__body p {
  margin: 14px 0 0;
  max-width: 38ch;
  font-size: var(--fs-1);
  line-height: 1.75;
}

.page-home .home-mobile__points {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  border-top: 2px solid var(--c-line);
}

.page-home .home-mobile__points li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px solid var(--c-line);
  font-size: var(--fs-1);
  line-height: 1.6;
}

.page-home .home-mobile__points .mono {
  flex: 0 0 auto;
  min-width: 68px;
  font-weight: 700;
  color: var(--c-blue);
}

.page-home .home-mobile__body .btn {
  margin-top: 22px;
}

@media (min-width: 900px) {
  .page-home .home-mobile__grid {
    grid-template-columns: 5fr 6fr;
    align-items: center;
    gap: clamp(34px, 5vw, 62px);
  }
}

/* ---------- 排查阶梯 ---------- */

.page-home .home-help {
  background: var(--c-fog);
  border-top: 2px solid var(--c-deep);
}

.page-home .home-help__lede {
  margin: 22px 0 0;
  max-width: 56ch;
  font-size: var(--fs-1);
  line-height: 1.78;
}

.page-home .home-steps {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
}

.page-home .home-step {
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 16px;
  padding: 20px 0;
  border-top: 2px solid var(--c-deep);
}

.page-home .home-step:last-child {
  border-bottom: 2px solid var(--c-deep);
}

.page-home .home-step__num {
  font-size: var(--fs-3);
  font-weight: 700;
  line-height: 1;
  color: var(--c-blue);
}

.page-home .home-step__title {
  margin: 0;
  font-size: var(--fs-2);
  font-weight: 800;
}

.page-home .home-step__body p {
  margin: 8px 0 0;
  max-width: 52ch;
  font-size: var(--fs-1);
  line-height: 1.75;
  color: var(--c-steel);
}

.page-home .home-help__more {
  margin: 26px 0 0;
}

@media (min-width: 760px) {
  .page-home .home-step:nth-child(2) {
    padding-left: 44px;
  }

  .page-home .home-step:nth-child(3) {
    padding-left: 88px;
  }
}

/* ---------- 更新节拍 ---------- */

.page-home .home-cadence {
  position: relative;
  background: var(--c-ink);
  color: var(--c-fog);
  padding-block: clamp(48px, 7vw, 88px);
  overflow: hidden;
}

.page-home .home-cadence__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
  filter: grayscale(1) contrast(1.1);
  z-index: 0;
}

.page-home .home-cadence::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(115deg, rgba(7, 32, 51, 0.95) 0%, rgba(7, 32, 51, 0.74) 58%, rgba(7, 32, 51, 0.42) 100%);
}

.page-home .home-cadence__inner {
  position: relative;
  z-index: 2;
}

.page-home .home-cadence .eyebrow {
  color: var(--c-volt);
}

.page-home .home-cadence h2 {
  margin: 14px 0 0;
  font-size: var(--fs-3);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.22;
}

.page-home .home-cadence__lede {
  margin: 16px 0 0;
  max-width: 52ch;
  font-size: var(--fs-1);
  line-height: 1.78;
  color: var(--c-line);
}

.page-home .home-cadence__stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.page-home .home-cstat {
  border-top: 4px solid var(--c-volt);
  padding-top: 14px;
}

.page-home .home-cstat__num {
  display: block;
  font-size: var(--fs-4);
  font-weight: 700;
  line-height: 1;
  color: var(--c-fog);
}

.page-home .home-cstat__label {
  display: block;
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.6;
  color: var(--c-line);
}

.page-home .home-cadence__note {
  margin: 28px 0 0;
  max-width: 62ch;
  font-size: var(--fs-1);
  line-height: 1.78;
  color: var(--c-line);
  border-left: 4px solid var(--c-volt);
  padding-left: 16px;
}

/* ---------- 订阅与反馈 ---------- */

.page-home .home-sub {
  background: var(--c-gravel);
}

.page-home .home-sub__grid {
  display: grid;
  gap: 20px;
}

.page-home .home-sub__col {
  background: var(--c-fog);
  border: var(--edge);
  box-shadow: var(--hard-sm);
  padding: 24px 22px 26px;
}

.page-home .home-sub__col h2 {
  margin: 12px 0 0;
  font-size: var(--fs-2);
  font-weight: 800;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.page-home .home-sub__col p {
  margin: 12px 0 0;
  max-width: 40ch;
  font-size: var(--fs-1);
  line-height: 1.75;
  color: var(--c-steel);
}

.page-home .home-sub__col .btn {
  margin-top: 20px;
}

.page-home .home-sub__col--alt {
  background: var(--c-blue);
  color: var(--c-fog);
}

.page-home .home-sub__col--alt .eyebrow {
  color: var(--c-volt);
}

.page-home .home-sub__col--alt p {
  color: var(--c-line);
}

@media (min-width: 820px) {
  .page-home .home-sub__grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-home .lane,
  .page-home .lane::after,
  .page-home .tabs__btn {
    transition: none;
  }

  .page-home .lane:hover,
  .page-home .lane:focus-within,
  .page-home .tabs__btn:hover {
    transform: none;
  }
}
</final>