.page-home {
  --ph-tick: repeating-linear-gradient(
    to bottom,
    var(--stone) 0 1px,
    transparent 1px 15px
  );
  position: relative;
  color: var(--bone);
  font-family: var(--font-body);
}

.page-home .micro {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--haze);
}

/* ---------- 面包屑条 ---------- */
.home-crumb {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-block: 18px 10px;
  border-bottom: var(--line);
}

.home-crumb__stamp {
  color: var(--haze);
  white-space: nowrap;
}

/* ---------- 侧边索引 ---------- */
.page-index {
  display: none;
}

/* ---------- 首屏 ---------- */
.hero {
  position: relative;
  padding-block: 38px 68px;
}

.hero__shell {
  display: grid;
  gap: 38px;
  align-items: start;
}

.hero__eyebrow {
  color: var(--cyan);
  margin-bottom: 14px;
}

.hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(40px, 9.5vw, 92px);
  line-height: 0.96;
  letter-spacing: -0.035em;
  margin: 0 0 26px;
  color: var(--bone);
}

.hero__title-line {
  display: block;
}

.hero__title-line--em {
  font-size: 0.46em;
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1.15;
  color: var(--cyan);
  margin-top: 18px;
}

.hero__lede {
  font-size: 16px;
  line-height: 1.85;
  color: var(--bone);
  opacity: 0.9;
  max-width: 47ch;
  margin: 0 0 28px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  margin-bottom: 36px;
}

.page-home .btn--primary {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: none;
}

.hero__link {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--haze);
  text-decoration: none;
  border-bottom: 1px solid var(--stone);
  padding-bottom: 3px;
  transition: color 180ms ease, border-color 180ms ease;
}

.hero__link:hover,
.hero__link:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
}

.hero__reads {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--stone);
  border: var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  max-width: 540px;
}

.hero__read {
  background: var(--ink-800);
  padding: 14px 16px;
}

.hero__read-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--bone);
  margin-top: 8px;
}

.hero__read-value--ok {
  color: var(--moss);
}

.hero__read-value--note {
  font-size: 13.5px;
  color: var(--bone);
  opacity: 0.88;
}

.dot {
  display: inline-block;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--moss);
  margin-right: 7px;
  vertical-align: middle;
  box-shadow: 0 0 0 3px rgba(126, 156, 122, 0.2);
}

.hero__frame {
  position: relative;
  margin: 0;
  border: var(--line);
  border-radius: var(--radius);
  background: linear-gradient(165deg, var(--ink-700) 0%, var(--ink-900) 72%);
  padding: 18px 18px 16px 34px;
  transition: border-color 220ms ease;
}

.hero__frame:hover {
  border-color: var(--cyan);
}

.hero__frame::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 18px;
  bottom: 16px;
  width: 6px;
  background-image: var(--ph-tick);
  opacity: 0.85;
}

.hero__frame-media {
  overflow: hidden;
  border: 1px solid var(--stone);
  border-radius: var(--radius);
}

.hero__frame-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.hero__frame-caption {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--haze);
}

.hero__frame-caption .micro {
  flex: 0 0 auto;
  color: var(--cyan);
}

/* ---------- 主题带 ---------- */
.topics {
  padding-block: 64px 72px;
}

.topics__head {
  max-width: 660px;
  margin-bottom: 32px;
}

.topics__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.6vw, 44px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  margin: 12px 0 16px;
  color: var(--bone);
}

.topics__lede {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--haze);
  margin: 0;
  max-width: 52ch;
}

.topics__banner {
  border-top: var(--line);
  border-bottom: var(--line);
  overflow: hidden;
  margin-bottom: 40px;
}

.topics__banner img {
  display: block;
  width: 100%;
  height: clamp(120px, 24vw, 240px);
  object-fit: cover;
  opacity: 0.72;
}

.topics__grid {
  display: grid;
  gap: 26px;
}

.topic {
  position: relative;
  padding: 30px 22px 26px;
  background: var(--ink-700);
  border: var(--line);
  border-radius: var(--radius);
  transition: border-color 220ms ease;
}

.topic:hover {
  border-color: var(--cyan);
}

.topic__rail {
  position: absolute;
  top: -1px;
  left: -1px;
  right: -1px;
  height: 3px;
  border-radius: var(--radius) var(--radius) 0 0;
}

.topic--a .topic__rail { background: var(--moss); }
.topic--b .topic__rail { background: var(--clay); }
.topic--c .topic__rail { background: var(--haze); }

.topic__no {
  margin: 0 0 14px;
  color: var(--haze);
}

.topic--a .topic__no { color: var(--moss); }
.topic--b .topic__no { color: var(--clay); }
.topic--c .topic__no { color: var(--haze); }

.topic__name {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 21px;
  line-height: 1.32;
  letter-spacing: -0.01em;
  margin: 0 0 14px;
  color: var(--bone);
}

.topic__text {
  font-size: 15px;
  line-height: 1.85;
  color: var(--bone);
  opacity: 0.8;
  margin: 0 0 22px;
}

.topic__link {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.05em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 3px;
  transition: border-color 180ms ease;
}

.topic__link:hover,
.topic__link:focus-visible {
  border-color: var(--cyan);
}

.topics__foot {
  margin: 36px 0 0;
  padding-top: 20px;
  border-top: var(--line);
  font-size: 14px;
  line-height: 1.85;
  color: var(--haze);
}

/* ---------- 首次访问 ---------- */
.first {
  padding-block: 48px 72px;
}

.first__shell {
  display: grid;
  gap: 36px;
  align-items: start;
}

.first__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.6vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 12px 0 32px;
  color: var(--bone);
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--stone);
}

.step {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding-block: 22px;
  border-bottom: 1px solid var(--stone);
}

.step__no {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--cyan);
  padding-top: 3px;
}

.step__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.4;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
  color: var(--bone);
}

.step__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--haze);
}

.first__figure {
  margin: 0;
}

/* ---------- 更新动态 ---------- */
.news {
  padding-block: 56px 72px;
}

.news__head {
  max-width: 660px;
}

.news__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.6vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 12px 0 0;
  color: var(--bone);
}

.news__timeline {
  margin: 32px 0 30px;
  border: var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.news__timeline img {
  display: block;
  width: 100%;
  height: clamp(100px, 20vw, 190px);
  object-fit: cover;
  opacity: 0.76;
}

.news__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--stone);
}

.news__item {
  display: grid;
  gap: 10px;
  padding: 22px 0;
  border-bottom: 1px solid var(--stone);
}

.news__item-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.4;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--bone);
}

.news__item-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--haze);
}

.news__item-time {
  color: var(--haze);
}

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

.news__more {
  display: inline-block;
  margin-top: 28px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
  padding-bottom: 3px;
  transition: color 180ms ease, border-color 180ms ease;
}

.news__more:hover,
.news__more:focus-visible {
  color: var(--amber);
  border-color: var(--amber);
}

/* ---------- 稳定与支持 ---------- */
.steady {
  padding-block: 56px 84px;
  background: linear-gradient(180deg, transparent 0%, rgba(5, 11, 20, 0.7) 46%);
}

.steady__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 4.6vw, 40px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 12px 0 36px;
  color: var(--bone);
}

.steady__grid {
  display: grid;
  gap: 1px;
  background: var(--stone);
  border: 1px solid var(--stone);
  border-radius: var(--radius);
  overflow: hidden;
}

.steady__cell {
  background: var(--ink-800);
  padding: 28px 22px 26px;
}

.steady__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(40px, 8vw, 66px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--bone);
}

.steady__unit {
  display: block;
  margin-top: 12px;
  font-size: 14px;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.steady__text {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--haze);
}

.steady__nav {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 26px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: var(--line);
}

.steady__nav a {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--bone);
  text-decoration: none;
  border-bottom: 1px solid var(--stone);
  padding-bottom: 3px;
  transition: color 180ms ease, border-color 180ms ease;
}

.steady__nav a:hover,
.steady__nav a:focus-visible {
  color: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 520px) {
  .hero__reads {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 720px) {
  .page-home .breadcrumb {
    font-size: 11px;
  }

  .news__item {
    grid-template-columns: 96px minmax(0, 1fr) auto;
    grid-template-areas:
      "tag title time"
      "tag text  text";
    column-gap: 24px;
    align-items: start;
    padding: 26px 0;
  }

  .news__item .tag { grid-area: tag; }
  .news__item-title { grid-area: title; }
  .news__item-text { grid-area: text; }
  .news__item-time { grid-area: time; padding-top: 4px; }

  .steady__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .hero {
    padding-block: 56px 108px;
  }

  .hero__shell {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 0;
  }

  .hero__main {
    grid-column: 1 / span 7;
    padding-right: 56px;
  }

  .hero__frame {
    grid-column: 9 / span 4;
    margin-top: 68px;
  }

  .topics {
    padding-block: 84px 96px;
  }

  .topics__head {
    margin-bottom: 40px;
  }

  .topics__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0;
    align-items: start;
  }

  .topic {
    border-radius: 0;
    border-right: none;
    padding: 32px 26px 28px;
  }

  .topic:last-child {
    border-right: var(--line);
  }

  .topic__rail {
    border-radius: 0;
  }

  .topic:nth-child(1) { margin-top: 0; }
  .topic:nth-child(2) { margin-top: 44px; }
  .topic:nth-child(3) { margin-top: 88px; }

  .first {
    padding-block: 72px 96px;
  }

  .first__shell {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
  }

  .first__media {
    margin-top: 92px;
  }

  .steps-title {
    margin-bottom: 36px;
  }

  .news {
    padding-block: 84px 96px;
  }

  .steady {
    padding-block: 84px 110px;
  }
}

@media (min-width: 1400px) {
  .page-index {
    display: flex;
    flex-direction: column;
    gap: 8px;
    position: fixed;
    right: 22px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 6;
    padding: 14px 12px;
    border: var(--line);
    border-radius: var(--radius);
    background: rgba(10, 22, 38, 0.88);
  }

  .page-index__link {
    font-family: var(--font-mono);
    font-size: 10.5px;
    letter-spacing: 0.12em;
    color: var(--haze);
    text-decoration: none;
    padding: 3px 7px;
    border-radius: var(--radius);
    transition: color 200ms ease, background-color 200ms ease;
  }

  .page-index__link:hover,
  .page-index__link:focus-visible {
    color: var(--bone);
  }

  .page-index__link[data-active] {
    color: var(--ink-900);
    background: var(--cyan);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .page-index {
    transform: none;
    top: 120px;
  }
}
<<<END>>>