.page-home {
  --home-rail: 196px;
  --home-gap: 3rem;
  --home-tint: rgba(47, 230, 214, .10);
}

/* ---------- 面包屑 ---------- */
.page-home .breadcrumbs {
  margin-top: 1.25rem;
  font-size: .82rem;
}

/* ---------- 首屏：对角切割 ---------- */
.page-home .home-hero {
  position: relative;
  overflow: hidden;
  background: var(--ink);
  border-bottom: 1px solid var(--line);
  isolation: isolate;
}

.page-home .home-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--ink-deep);
  clip-path: polygon(56% 0, 100% 0, 100% 100%, 30% 100%);
  z-index: -2;
}

.page-home .home-hero__wedge {
  position: absolute;
  inset: -12% -10% -12% 30%;
  background: linear-gradient(158deg, rgba(47, 230, 214, .20) 0%, rgba(47, 230, 214, 0) 58%);
  clip-path: polygon(32% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
  z-index: -1;
}

.page-home .home-hero__mesh {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(143, 163, 196, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(143, 163, 196, .07) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .9), transparent 82%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .9), transparent 82%);
  pointer-events: none;
  z-index: -1;
}

.page-home .home-hero__inner {
  position: relative;
  display: grid;
  gap: 2.25rem;
  padding: 2.5rem 0 3.25rem;
}

.page-home .home-hero__title {
  margin: .6rem 0 0;
  font-family: var(--font-head);
  font-size: clamp(2.35rem, 8.4vw, 4.25rem);
  line-height: .96;
  letter-spacing: -.01em;
  text-transform: uppercase;
  color: var(--paper);
}

.page-home .home-hero__hl {
  display: inline-block;
  margin-top: .35rem;
  font-size: .58em;
  letter-spacing: .01em;
  color: var(--cyan);
  text-transform: none;
}

.page-home .home-hero__lead {
  margin: 1.15rem 0 0;
  max-width: 46ch;
  color: var(--mist);
  font-size: 1rem;
  line-height: 1.8;
}

.page-home .home-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin: 1.6rem 0 0;
}

.page-home .hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 2rem 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-home .hero-facts__item {
  background: rgba(11, 18, 48, .72);
  padding: .85rem .9rem 1rem;
}

.page-home .hero-facts__item dt {
  font-size: .7rem;
  letter-spacing: .08em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-home .hero-facts__item dd {
  margin: .4rem 0 0;
  font-size: 1.05rem;
  color: var(--amber);
}

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

.page-home .home-hero__media .media-frame {
  border-color: var(--line-cyan);
  box-shadow: var(--shadow);
}

/* ---------- 主体骨架 ---------- */
.page-home .home-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--home-gap);
  padding-top: 3rem;
  padding-bottom: 3.5rem;
}

.page-home .home-body {
  min-width: 0;
}

/* ---------- 侧边编号轨道 ---------- */
.page-home .rail {
  display: none;
}

.page-home .rail__title {
  margin: 0 0 .9rem;
  font-family: var(--font-head);
  font-size: .72rem;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-home .rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-left: 1px solid var(--line);
}

.page-home .rail__link {
  display: flex;
  align-items: baseline;
  gap: .5rem;
  padding: .55rem 0 .55rem .9rem;
  margin-left: -1px;
  border-left: 2px solid transparent;
  font-size: .86rem;
  color: var(--mist);
  text-decoration: none;
  transition: color .2s, border-color .2s, background .2s;
}

.page-home .rail__link .num {
  font-size: .7rem;
  color: var(--graphite);
  transition: color .2s;
}

.page-home .rail__link:hover,
.page-home .rail__link[aria-current="true"] {
  color: var(--paper);
  border-left-color: var(--cyan);
  background: rgba(47, 230, 214, .05);
}

.page-home .rail__link:hover .num,
.page-home .rail__link[aria-current="true"] .num {
  color: var(--cyan);
}

/* ---------- 章节通用 ---------- */
.page-home .home-sec {
  padding-bottom: 4rem;
  scroll-margin-top: 8.5rem;
}

.page-home .home-sec:last-of-type {
  padding-bottom: 2.5rem;
}

.page-home .section__index {
  font-family: var(--font-head);
  font-size: clamp(2.6rem, 7vw, 4.25rem);
  line-height: .82;
  color: transparent;
  -webkit-text-stroke: 1px rgba(143, 163, 196, .55);
  letter-spacing: .02em;
}

.page-home .section__title {
  font-size: clamp(1.35rem, 3.6vw, 2rem);
  line-height: 1.2;
}

.page-home .section__sub {
  margin-top: .85rem;
  max-width: 62ch;
  color: var(--mist);
  font-size: .96rem;
  line-height: 1.85;
}

.page-home .after-note {
  margin: 1.5rem 0 0;
  padding-left: .9rem;
  border-left: 2px solid var(--graphite);
  color: var(--mist);
  font-size: .9rem;
  line-height: 1.8;
}

.page-home .text-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
  padding-bottom: 1px;
}

.page-home .text-link:hover {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

/* ---------- 01 四档区间 ---------- */
.page-home .tier-list {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 2rem 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-home .tier {
  position: relative;
  background: rgba(11, 18, 48, .92);
  padding: 1.4rem 1.15rem 1.5rem;
  transition: background .25s ease, transform .25s ease;
}

.page-home .tier::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .3s ease;
}

.page-home .tier:hover,
.page-home .tier:focus-within {
  background: var(--panel);
  transform: translateY(-2px);
}

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

.page-home .tier--a::after {
  background: var(--amber);
  transform: scaleX(1);
}

.page-home .tier__code {
  margin: 0;
  font-size: .7rem;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--graphite);
}

.page-home .tier--a .tier__code {
  color: var(--amber);
}

.page-home .tier__name {
  margin: .55rem 0 0;
  font-family: var(--font-head);
  font-size: 1.3rem;
  letter-spacing: .04em;
  color: var(--paper);
}

.page-home .tier__desc {
  margin: .7rem 0 0;
  color: var(--mist);
  font-size: .88rem;
  line-height: 1.75;
}

.page-home .tier__note {
  margin: 1rem 0 0;
  padding: .42rem .6rem;
  border: 1px solid var(--line);
  font-size: .76rem;
  letter-spacing: .04em;
  color: var(--graphite);
  background: rgba(5, 7, 15, .5);
  transition: color .25s, border-color .25s;
}

.page-home .tier:hover .tier__note,
.page-home .tier:focus-within .tier__note {
  color: var(--cyan);
  border-color: var(--line-cyan);
}

/* ---------- 02 桌台图谱 ---------- */
.page-home .table-map {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1rem;
  margin-top: 2rem;
}

.page-home .tmap__group {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(22, 34, 61, .9), rgba(11, 18, 48, .6));
  padding: 1.2rem 1.1rem 1.35rem;
}

.page-home .tmap__group--video {
  border-color: var(--line-cyan);
  background: linear-gradient(180deg, rgba(47, 230, 214, .08), rgba(11, 18, 48, .7));
}

.page-home .tmap__head {
  border-bottom: 1px solid var(--line-soft);
  padding-bottom: .9rem;
}

.page-home .tmap__count {
  display: block;
  font-size: 2.4rem;
  line-height: 1;
  color: var(--cyan);
}

.page-home .tmap__group--video .tmap__count {
  color: var(--amber);
}

.page-home .tmap__title {
  margin: .45rem 0 0;
  font-family: var(--font-head);
  font-size: 1.1rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--paper);
}

.page-home .tmap__lede {
  margin: .5rem 0 0;
  font-size: .82rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-home .tmap__chips {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 1rem 0 0;
  padding: 0;
}

.page-home .tmap__chip {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .38rem .68rem;
  border: 1px solid var(--line);
  background: rgba(5, 7, 15, .55);
  font-size: .82rem;
  color: var(--paper);
}

.page-home .tmap__chip::before {
  content: "";
  width: 5px;
  height: 5px;
  background: var(--cyan);
  flex: none;
}

.page-home .tmap__group:last-child .tmap__chip::before {
  background: var(--amber);
}

/* ---------- 03 延迟时间轴 ---------- */
.page-home .latency-line {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.5rem;
  margin: 2rem 0 0;
  padding: 0 0 0 1.35rem;
  border-left: 1px solid var(--line-cyan);
}

.page-home .latency-line__step {
  position: relative;
}

.page-home .latency-line__dot {
  position: absolute;
  left: -1.6rem;
  top: .45rem;
  width: 9px;
  height: 9px;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(47, 230, 214, .16);
}

.page-home .latency-line__step:nth-child(3) .latency-line__dot {
  background: var(--amber);
  box-shadow: 0 0 0 3px rgba(242, 179, 74, .18);
}

.page-home .latency-line__name {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.06rem;
  letter-spacing: .09em;
  text-transform: uppercase;
  color: var(--paper);
}

.page-home .latency-line__text {
  margin: .5rem 0 0;
  font-size: .88rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-home .latency-band {
  margin: 2rem 0 0;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--ink-deep), rgba(11, 18, 48, .7));
  padding: .75rem;
}

.page-home .lfield-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: 1.5rem;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-home .lfield-grid .disclosure {
  background: rgba(11, 18, 48, .9);
}

/* ---------- 04 频次明细 ---------- */
.page-home .freq-list {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.page-home .freq-row {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line);
  transition: background .25s;
}

.page-home .freq-row:hover {
  background: rgba(22, 34, 61, .45);
}

.page-home .freq-row__key {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.6rem;
  height: 2.6rem;
  border: 1px solid var(--line-cyan);
  color: var(--cyan);
  font-size: .95rem;
}

.page-home .freq-row__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: 1.06rem;
  letter-spacing: .06em;
  color: var(--paper);
}

.page-home .freq-row__text {
  margin: .45rem 0 0;
  font-size: .88rem;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 05 青海本地服务 ---------- */
.page-home .qinghai-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.75rem;
  margin-top: 2rem;
  align-items: start;
}

.page-home .qinghai-copy__title {
  margin: 0;
  font-size: 1.15rem;
  line-height: 1.5;
  color: var(--paper);
}

.page-home .qinghai-copy p {
  margin: .9rem 0 0;
  font-size: .92rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-home .qinghai-actions {
  margin-top: 1.35rem !important;
}

.page-home .qinghai-media {
  margin: 0;
}

.page-home .qinghai-media .media-frame {
  border-color: rgba(143, 163, 196, .22);
}

/* ---------- 06 数据一览 ---------- */
.page-home .metrics-band {
  margin: 2rem 0 0;
  border: 1px solid var(--line);
  background: var(--ink-deep);
  padding: .75rem;
}

.page-home .metric-grid {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 1.5rem 0 0;
  padding: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-home .metric {
  background: rgba(11, 18, 48, .92);
  padding: 1.15rem .95rem 1.25rem;
}

.page-home .metric__num {
  font-size: 1.9rem;
  line-height: 1;
  color: var(--cyan);
}

.page-home .metric:nth-child(3n) .metric__num {
  color: var(--amber);
}

.page-home .metric__unit {
  margin-left: .3rem;
  font-size: .82rem;
  color: var(--mist);
}

.page-home .metric__label {
  margin: .6rem 0 0;
  font-size: .8rem;
  line-height: 1.65;
  color: var(--mist);
}

/* ---------- 尾部行动区 ---------- */
.page-home .home-cta {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line-cyan);
  background: linear-gradient(140deg, rgba(22, 34, 61, .95), rgba(5, 7, 15, .95));
  padding: 2rem 1.35rem 2.25rem;
}

.page-home .home-cta::after {
  content: "";
  position: absolute;
  right: -18%;
  top: -60%;
  width: 52%;
  height: 200%;
  background: linear-gradient(170deg, rgba(47, 230, 214, .14), rgba(47, 230, 214, 0) 62%);
  clip-path: polygon(40% 0, 100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-home .home-cta__title {
  position: relative;
  margin: 0;
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 5vw, 2.25rem);
  line-height: 1.1;
  letter-spacing: .02em;
  text-transform: uppercase;
  color: var(--paper);
}

.page-home .home-cta__text {
  position: relative;
  margin: .95rem 0 0;
  max-width: 54ch;
  font-size: .94rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-home .home-cta__actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin: 1.5rem 0 0;
}

/* ---------- 断点：窄屏保底 ---------- */
@media (max-width: 479px) {
  .page-home .hero-facts {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .page-home .home-cta {
    padding: 1.6rem 1rem 1.85rem;
  }
}

@media (min-width: 640px) {
  .page-home .tier-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-home .tmap__group--video {
    grid-column: span 2;
  }

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

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

@media (min-width: 900px) {
  .page-home .home-hero__inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, .72fr);
    align-items: center;
    gap: 3.5rem;
    padding: 3.5rem 0 4.25rem;
  }

  .page-home .latency-line {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.75rem;
    padding: 1.6rem 0 0;
    border-left: 0;
    border-top: 1px solid var(--line-cyan);
  }

  .page-home .latency-line__dot {
    left: 0;
    top: -1.6rem;
  }

  .page-home .qinghai-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 2.5rem;
  }

  .page-home .home-cta {
    padding: 2.75rem 2.5rem 3rem;
  }
}

@media (min-width: 1024px) {
  .page-home .home-shell {
    grid-template-columns: var(--home-rail) minmax(0, 1fr);
    gap: 3.75rem;
    padding-top: 3.75rem;
    padding-bottom: 4.5rem;
  }

  .page-home .rail {
    display: block;
    position: sticky;
    top: 9rem;
    align-self: start;
  }

  .page-home .tier-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-home .table-map {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr) minmax(0, 1fr);
  }

  .page-home .tmap__group--video {
    grid-column: auto;
  }
}

@media (min-width: 1200px) {
  .page-home .metric-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .tier,
  .page-home .tier::after,
  .page-home .freq-row,
  .page-home .rail__link {
    transition: none;
  }

  .page-home .tier:hover,
  .page-home .tier:focus-within {
    transform: none;
  }
}