.page-home {
  --home-line-soft: rgba(42, 63, 92, 0.75);
  --home-accent-soft: rgba(255, 255, 255, 0.03);
}

/* ---------- 区块节奏 ---------- */
.page-home > section {
  padding-block: clamp(44px, 7vw, 92px);
}

.page-home .chunk {
  max-width: 72ch;
  margin-bottom: clamp(24px, 4vw, 44px);
}

.page-home .chunk__kicker {
  display: block;
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--muted);
  margin-bottom: 14px;
}

.page-home .chunk__title {
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.34;
  font-weight: 900;
  color: var(--white);
  letter-spacing: 0.01em;
}

.page-home .chunk__lead {
  margin-top: 14px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text);
}

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

.page-home .shot img {
  display: block;
  width: 100%;
  height: auto;
  border: var(--hair);
  background: var(--panel);
}

.page-home .shot figcaption {
  margin-top: 12px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* ---------- 首屏 ---------- */
.page-home .hero {
  padding-block: clamp(34px, 6vw, 72px) clamp(46px, 7vw, 88px);
}

.page-home .hero__grid {
  display: grid;
  gap: clamp(34px, 5vw, 58px);
  align-items: center;
}

.page-home .hero__eyebrow {
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--muted);
}

.page-home .hero__title {
  margin-top: 16px;
  font-size: clamp(28px, 5.2vw, 52px);
  line-height: 1.22;
  font-weight: 900;
  color: var(--white);
  letter-spacing: -0.01em;
}

.page-home .hero__lead {
  margin-top: 20px;
  max-width: 48ch;
  font-size: 15px;
  line-height: 1.95;
  color: var(--text);
}

.page-home .hero__points {
  margin-top: 28px;
  display: grid;
  gap: 14px;
}

.page-home .hero__points li {
  display: grid;
  grid-template-columns: 4.4rem minmax(0, 1fr);
  gap: 14px;
  padding-top: 14px;
  border-top: var(--hair);
  font-size: 14px;
  line-height: 1.85;
  color: var(--text);
}

.page-home .hero__point-k {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--orange);
  padding-top: 2px;
}

.page-home .hero__actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 首屏同心轨道视觉 */
.page-home .hero__visual {
  display: grid;
  place-items: center;
}

.page-home .orbit {
  margin: 0;
  width: min(100%, 440px);
}

.page-home .orbit__rings {
  position: relative;
  width: 100%;
  aspect-ratio: 1 / 1;
  display: grid;
  place-items: center;
}

.page-home .orbit__ticks {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: repeating-conic-gradient(from 0deg, var(--line) 0deg 0.7deg, transparent 0.7deg 6deg);
  -webkit-mask: radial-gradient(circle closest-side, transparent 0 93%, #000 93.5% 100%, transparent 100%);
  mask: radial-gradient(circle closest-side, transparent 0 93%, #000 93.5% 100%, transparent 100%);
  animation: home-orbit-spin 140s linear infinite;
}

.page-home .orbit__ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--line);
}

.page-home .orbit__ring--a {
  inset: 6%;
  border-color: var(--home-line-soft);
  border-style: dashed;
}

.page-home .orbit__ring--b {
  inset: 18%;
}

.page-home .orbit__node {
  position: absolute;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 255, 0.16);
}

.page-home .orbit__node--one {
  top: 7%;
  left: 50%;
  transform: translateX(-50%);
}

.page-home .orbit__node--two {
  bottom: 20%;
  left: 11%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.16);
}

.page-home .orbit__node--three {
  top: 31%;
  right: 5%;
  background: var(--blue);
  box-shadow: 0 0 0 4px rgba(79, 168, 255, 0.16);
}

.page-home .orbit__core {
  position: relative;
  width: 58%;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
}

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

.page-home .orbit__cap {
  margin-top: 18px;
  text-align: center;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
}

@keyframes home-orbit-spin {
  to {
    transform: rotate(360deg);
  }
}

/* ---------- 三条入口 ---------- */
.page-home .legend {
  display: grid;
  border-top: var(--hair);
}

.page-home .legend__item {
  border-bottom: var(--hair);
  --accent: var(--orange);
}

.page-home .legend__item--cyan {
  --accent: var(--cyan);
}

.page-home .legend__item--blue {
  --accent: var(--blue);
}

.page-home .legend__link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  grid-template-areas:
    "num name arrow"
    "num desc desc";
  column-gap: 16px;
  row-gap: 8px;
  padding: 22px 0;
  color: inherit;
  text-decoration: none;
}

.page-home .legend__num {
  grid-area: num;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: var(--hair);
  font-size: 13px;
  color: var(--muted);
  transition: background-color 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-home .legend__name {
  grid-area: name;
  font-size: 19px;
  font-weight: 700;
  color: var(--white);
  align-self: center;
}

.page-home .legend__desc {
  grid-area: desc;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text);
}

.page-home .legend__arrow {
  grid-area: arrow;
  align-self: center;
  font-size: 15px;
  color: var(--muted);
  transition: transform 0.25s var(--ease), color 0.25s var(--ease);
}

.page-home .legend__link:hover .legend__num,
.page-home .legend__link:focus-visible .legend__num {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--ink);
}

.page-home .legend__link:hover .legend__arrow,
.page-home .legend__link:focus-visible .legend__arrow {
  color: var(--accent);
  transform: translateX(4px);
}

.page-home .legend__link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

/* ---------- 更新节奏 ---------- */
.page-home .rhythm__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-home .feed {
  margin-top: 26px;
  border-top: var(--hair);
}

.page-home .feed__item {
  padding: 18px 0;
  border-bottom: var(--hair);
}

.page-home .feed__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 10px;
}

.page-home .feed__meta {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-home .feed__item p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--text);
}

/* ---------- 迭代轨迹 ---------- */
.page-home .timeline {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 250px;
  gap: clamp(18px, 3vw, 30px);
  overflow-x: auto;
  padding-bottom: 16px;
  scroll-snap-type: x proximity;
}

.page-home .timeline__item {
  position: relative;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  scroll-snap-align: start;
  transition: border-color 0.25s var(--ease);
}

.page-home .timeline__item::after {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.32s var(--ease);
}

.page-home .timeline__item:hover::after,
.page-home .timeline__item:focus-visible::after {
  transform: scaleX(1);
}

.page-home .timeline__item:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 6px;
}

.page-home .timeline__dot {
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--line);
  transition: background-color 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-home .timeline__item:hover .timeline__dot,
.page-home .timeline__item:focus-visible .timeline__dot {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-home .timeline__item .vcode {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  border: var(--hair);
  padding: 3px 8px;
}

.page-home .timeline__name {
  margin-top: 14px;
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}

.page-home .timeline__note {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
}

.page-home .timeline__more {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
  transition: max-height 0.35s var(--ease), opacity 0.35s var(--ease), margin-top 0.35s var(--ease);
}

.page-home .timeline__item:hover .timeline__more,
.page-home .timeline__item:focus-visible .timeline__more {
  max-height: 9rem;
  opacity: 1;
  margin-top: 10px;
}

/* ---------- 起步路径 ---------- */
.page-home .start__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-home .start__card {
  border-top: 2px solid var(--line);
  padding-top: 22px;
}

.page-home .start__card--a {
  border-top-color: var(--cyan);
}

.page-home .start__card--b {
  border-top-color: var(--orange);
}

.page-home .start__title {
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
}

.page-home .start__steps {
  margin-top: 16px;
  display: grid;
  gap: 12px;
  counter-reset: home-step;
}

.page-home .start__steps li {
  display: grid;
  grid-template-columns: 1.8rem minmax(0, 1fr);
  gap: 10px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text);
}

.page-home .start__steps li::before {
  counter-increment: home-step;
  content: counter(home-step, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  padding-top: 3px;
}

.page-home .start__link {
  display: inline-block;
  margin-top: 20px;
  font-size: 14px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.35);
  padding-bottom: 2px;
  transition: border-color 0.25s var(--ease), color 0.25s var(--ease);
}

.page-home .start__link:hover,
.page-home .start__link:focus-visible {
  color: var(--white);
  border-bottom-color: var(--white);
}

/* ---------- 资料下载 ---------- */
.page-home .archive__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-home .filters {
  margin-top: 24px;
  display: grid;
  gap: 14px;
}

.page-home .filters li {
  display: grid;
  grid-template-columns: 5rem minmax(0, 1fr);
  gap: 12px;
  padding-top: 14px;
  border-top: var(--hair);
  font-size: 14px;
  line-height: 1.82;
  color: var(--text);
}

.page-home .filters__k {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--blue);
  padding-top: 2px;
}

.page-home .archive__cta {
  margin-top: 26px;
}

/* ---------- 服务能力 ---------- */
.page-home .stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: var(--hair);
}

.page-home .stats__item {
  background: var(--ink);
  padding: 22px 18px;
}

.page-home .stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(26px, 3.6vw, 36px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--white);
}

.page-home .stats__num em {
  font-style: normal;
  color: var(--orange);
}

.page-home .stats__label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-home .scale__fig {
  margin-top: clamp(26px, 4vw, 44px);
}

.page-home .folds {
  margin-top: clamp(26px, 4vw, 44px);
  border-top: var(--hair);
}

.page-home .fold {
  border-bottom: var(--hair);
}

.page-home .fold__q {
  position: relative;
  cursor: pointer;
  list-style: none;
  padding: 18px 36px 18px 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
}

.page-home .fold__q::-webkit-details-marker {
  display: none;
}

.page-home .fold__q::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--orange);
}

.page-home .fold[open] .fold__q::after {
  content: "–";
}

.page-home .fold__q:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-home .fold__body {
  padding-bottom: 22px;
  max-width: 68ch;
  font-size: 14px;
  line-height: 1.92;
  color: var(--text);
}

.page-home .fold__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.4);
}

.page-home .fold__body a:hover,
.page-home .fold__body a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--white);
}

/* ---------- 进入视口的渐进增强 ---------- */
.has-js .page-home [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
}

.has-js .page-home [data-reveal].is-revealed {
  opacity: 1;
  transform: none;
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}

/* ---------- 响应式 ---------- */
@media (min-width: 860px) {
  .page-home .hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }

  .page-home .legend {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-top: 0;
    border-left: var(--hair);
  }

  .page-home .legend__item {
    border-bottom: 0;
    border-top: var(--hair);
    border-right: var(--hair);
  }

  .page-home .legend__link {
    padding: 26px 22px 30px;
    grid-template-columns: auto minmax(0, 1fr);
    grid-template-areas:
      "num name"
      "num desc";
  }

  .page-home .legend__arrow {
    display: none;
  }

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

  .page-home .rhythm__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

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

  .page-home .archive__grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  }
}

@media (min-width: 920px) {
  .page-home .timeline {
    grid-auto-columns: minmax(0, 1fr);
    overflow-x: visible;
    padding-bottom: 0;
  }
}

@media (min-width: 760px) {
  .page-home .stats {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (max-width: 520px) {
  .page-home .hero__points li {
    grid-template-columns: 3.6rem minmax(0, 1fr);
    gap: 10px;
  }

  .page-home .filters li,
  .page-home .start__steps li {
    grid-template-columns: 4.2rem minmax(0, 1fr);
  }

  .page-home .orbit {
    width: min(100%, 320px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home *,
  .page-home *::before,
  .page-home *::after {
    animation: none !important;
    transition: none !important;
  }

  .has-js .page-home [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }

  .page-home .timeline__more {
    max-height: none;
    opacity: 1;
    margin-top: 10px;
  }
}