/* ==========================================================
   page-home — 首页专属样式
   作用域：.page-home
   ========================================================== */

.page-home {
  --home-line: 1px solid var(--hair);
  --home-dark-line: 1px solid rgba(195, 208, 222, .2);
  --home-gap: clamp(18px, 3.2vw, 34px);
  display: block;
  background: var(--paper-000);
  color: var(--graphite);
  overflow-x: clip;
}

.page-home .crumbs {
  padding-block: 14px 4px;
}

/* ---------- 首屏 ---------- */
.page-home .hero {
  position: relative;
  padding: 6px 0 clamp(34px, 5vw, 62px);
  background:
    radial-gradient(115% 88% at 92% 0%, rgba(53, 227, 206, .18), transparent 60%),
    linear-gradient(180deg, var(--mist-200) 0%, var(--paper-000) 82%);
}

.page-home .hero__canvas {
  position: relative;
  display: grid;
  gap: clamp(22px, 3.4vw, 42px);
  padding: clamp(24px, 4.4vw, 58px);
  background: linear-gradient(148deg, var(--ink-900) 0%, var(--ink-800) 58%, var(--ink-700) 100%);
  border: var(--home-dark-line);
  box-shadow: var(--shadow-2);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 46px), calc(100% - 46px) 100%, 0 100%);
  overflow: hidden;
  isolation: isolate;
}

.page-home .hero__bolt {
  position: absolute;
  inset: auto 0 0 0;
  width: 100%;
  height: clamp(58px, 10vw, 118px);
  color: var(--cyan-500);
  opacity: .42;
  pointer-events: none;
  z-index: 0;
}

.page-home .hero__lead,
.page-home .hero__art {
  position: relative;
  z-index: 1;
}

.page-home .hero__sig {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan-100);
}

.page-home .hero__glyph {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  background: var(--cyan-500);
  color: var(--ink-900);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: .04em;
  border-radius: 2px;
}

.page-home .hero h1 {
  margin: 8px 0 18px;
  max-width: 24ch;
  color: var(--paper-000);
  font-size: clamp(29px, 5.2vw, 46px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.012em;
}

.page-home .hero__lede {
  margin: 0 0 26px;
  color: rgba(247, 249, 252, .84);
  font-size: 16px;
  line-height: 1.78;
}

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

.page-home .hero__art {
  margin: 0;
  border: var(--home-dark-line);
  background: rgba(7, 26, 50, .4);
  box-shadow: var(--shadow-1);
}

.page-home .hero__art img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 四条路径卡 ---------- */
.page-home .hero__paths {
  display: grid;
  gap: 14px;
  margin-top: clamp(24px, 3.6vw, 40px);
}

.page-home .path-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 20px 18px 22px;
  background: var(--paper-000);
  border: var(--home-line);
  box-shadow: var(--shadow-1);
  color: var(--graphite);
  text-decoration: none;
  transition: transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}

.page-home .path-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--cyan-500);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform var(--dur) var(--ease);
}

.page-home .path-card:hover,
.page-home .path-card:focus-visible {
  transform: translateY(-4px);
  border-color: var(--ink-700);
  box-shadow: var(--shadow-2);
}

.page-home .path-card:hover::before,
.page-home .path-card:focus-visible::before {
  transform: scaleY(1);
}

.page-home .path-card__no {
  font-size: 12px;
  letter-spacing: .1em;
}

.page-home .path-card__title {
  font-size: 18px;
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.005em;
}

.page-home .path-card__for {
  font-size: 14px;
  line-height: 1.7;
  color: var(--grey-500);
  flex: 1 1 auto;
}

.page-home .path-card__go {
  margin-top: 6px;
  font-size: 13px;
  font-weight: 700;
  color: var(--amber-deep);
  letter-spacing: .02em;
}

/* ---------- 十二类对照标准 ---------- */
.page-home .standards {
  padding: clamp(44px, 6.4vw, 84px) 0;
  background: var(--mist-200);
  border-top: var(--home-line);
  border-bottom: var(--home-line);
}

.page-home .standards__art {
  margin: 26px 0 30px;
  border: var(--home-line);
  background: var(--paper-000);
  box-shadow: var(--shadow-1);
}

.page-home .standards__art img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 6;
  object-fit: cover;
}

.page-home .standards__cap {
  padding: 10px 16px 12px;
  border-top: var(--home-line);
  font-size: 13px;
  line-height: 1.65;
  color: var(--grey-500);
}

.page-home .standards__rail {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(216px, 1fr);
  gap: 0;
  margin: 0;
  padding: 0 0 8px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-home .std {
  position: relative;
  scroll-snap-align: start;
  padding: 18px 18px 20px;
  background: var(--paper-000);
  border: var(--home-line);
  border-left-width: 0;
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-home .std:first-child {
  border-left-width: 1px;
}

.page-home .std::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--cyan-500);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform var(--dur) var(--ease);
}

.page-home .std:hover {
  background: var(--cyan-100);
}

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

.page-home .std__no {
  font-size: 12px;
  letter-spacing: .1em;
}

.page-home .std__name {
  margin: 8px 0 6px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.35;
}

.page-home .std__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--grey-500);
}

/* ---------- 修订轴 ---------- */
.page-home .revisions {
  padding: clamp(44px, 6.4vw, 84px) 0;
  background: var(--paper-000);
}

.page-home .revisions__art {
  margin: 0 0 26px;
  border-block: var(--home-line);
}

.page-home .revisions__art img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 5;
  object-fit: cover;
}

.page-home .revisions__strip {
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(266px, 1fr);
  gap: 0;
  border: var(--home-line);
  background: var(--paper-000);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
}

.page-home .revisions__strip:focus-visible {
  outline: 2px solid var(--cyan-deep);
  outline-offset: 3px;
}

.page-home .rev {
  scroll-snap-align: start;
  padding: 22px 20px 24px;
  border-left: var(--home-line);
  background: linear-gradient(180deg, var(--mist-200) 0%, var(--paper-000) 46%);
}

.page-home .rev:first-child {
  border-left: 0;
}

.page-home .rev__year {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--ink-700);
  letter-spacing: .02em;
}

.page-home .rev__span {
  margin: 6px 0 14px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--cyan-deep);
}

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

.page-home .rev__list li {
  position: relative;
  margin-bottom: 10px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--graphite);
}

.page-home .rev__list li::before {
  content: "";
  position: absolute;
  left: -16px;
  top: .68em;
  width: 8px;
  height: 1px;
  background: var(--hair);
}

/* ---------- 覆盖范围 ---------- */
.page-home .coverage {
  padding: clamp(44px, 6.4vw, 84px) 0;
  background: var(--mist-200);
  border-block: var(--home-line);
}

.page-home .coverage__main h2,
.page-home .standards h2,
.page-home .revisions h2,
.page-home .install h2,
.page-home .quick h2 {
  margin: 8px 0 14px;
  font-size: clamp(24px, 3.2vw, 30px);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.01em;
  max-width: 26ch;
}

.page-home .coverage__main p.measure,
.page-home .quick__intro p.measure {
  color: var(--grey-500);
}

.page-home .coverage__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 28px 0 0;
  background: var(--hair);
  border: var(--home-line);
  overflow: hidden;
}

.page-home .coverage__stats > div {
  padding: 16px 16px 18px;
  background: var(--paper-000);
}

.page-home .coverage__stats dt {
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--grey-500);
  margin-bottom: 8px;
}

.page-home .coverage__stats dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--ink-800);
  letter-spacing: -0.01em;
}

.page-home .coverage__stats dd span {
  margin-left: 4px;
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 500;
  color: var(--grey-500);
}

.page-home .coverage__aside {
  margin-top: 24px;
  padding: 22px;
  background: var(--paper-000);
  border: var(--home-line);
  box-shadow: var(--shadow-1);
}

.page-home .coverage__aside-title {
  margin: 0 0 16px;
  padding-bottom: 12px;
  border-bottom: var(--home-line);
  font-size: 18px;
  font-weight: 700;
}

.page-home .coverage__case + .coverage__case {
  margin-top: 16px;
  padding-top: 16px;
  border-top: var(--home-line);
}

.page-home .coverage__case p {
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--graphite);
}

.page-home .coverage__case .folio {
  margin: 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan-deep);
}

.page-home .coverage__more {
  margin: 18px 0 0;
}

.page-home .coverage__more a {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink-700);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-500);
  padding-bottom: 2px;
}

/* ---------- 安装流程 ---------- */
.page-home .install {
  padding: clamp(44px, 6.4vw, 84px) 0;
  background: var(--paper-000);
}

.page-home .install__flow {
  display: grid;
  gap: 16px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-home .install__node {
  position: relative;
  padding: 22px 20px 22px 24px;
  background: var(--mist-200);
  border: var(--home-line);
  border-left: 3px solid var(--ink-700);
}

.page-home .install__node:nth-child(2) {
  border-left-color: var(--cyan-deep);
}

.page-home .install__node:nth-child(3) {
  border-left-color: var(--amber-500);
}

.page-home .install__node:nth-child(4) {
  border-left-color: var(--ink-700);
}

.page-home .install__no {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--grey-500);
}

.page-home .install__node h3 {
  margin: 8px 0 8px;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: -0.005em;
}

.page-home .install__node p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--graphite);
}

.page-home .install__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: var(--home-line);
}

.page-home .install__metric {
  flex: 1 1 260px;
  margin: 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--grey-500);
}

.page-home .install__metric .folio {
  margin-right: 8px;
  font-size: 20px;
  font-weight: 700;
}

/* ---------- 老用户快捷区 ---------- */
.page-home .quick {
  padding: 0 0 clamp(44px, 6.4vw, 84px);
  background: var(--paper-000);
}

.page-home .quick__panel {
  display: grid;
  gap: 26px;
  padding: clamp(24px, 4vw, 46px);
  background:
    linear-gradient(120deg, var(--mist-200) 0%, var(--paper-000) 62%),
    var(--paper-000);
  border: var(--home-line);
  box-shadow: var(--shadow-1);
}

.page-home .quick__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-home .quick__clues {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--hair);
  border: var(--home-line);
}

.page-home .quick__clues li {
  padding: 18px 18px 20px;
  background: var(--paper-000);
}

.page-home .quick__clue-no {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan-deep);
}

.page-home .quick__clues strong {
  display: block;
  margin: 8px 0 6px;
  font-size: 17px;
  font-weight: 700;
}

.page-home .quick__clues p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--grey-500);
}

/* ---------- 页尾档案面板 ---------- */
.page-home .closing {
  padding: 0 0 clamp(48px, 7vw, 96px);
  background: var(--paper-000);
}

.page-home .closing__panel {
  position: relative;
  display: grid;
  gap: 26px;
  padding: clamp(26px, 4.4vw, 56px);
  background: linear-gradient(160deg, var(--ink-900) 0%, var(--ink-800) 68%, var(--ink-700) 100%);
  border: var(--home-dark-line);
  box-shadow: var(--shadow-2);
  overflow: hidden;
}

.page-home .closing__panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--cyan-500), transparent 82%);
}

.page-home .closing__text {
  position: relative;
  z-index: 1;
}

.page-home .closing__text h2 {
  margin: 8px 0 16px;
  max-width: 22ch;
  color: var(--paper-000);
  font-size: clamp(24px, 3.4vw, 32px);
  font-weight: 800;
  line-height: 1.26;
  letter-spacing: -0.01em;
}

.page-home .closing__text p.measure {
  color: rgba(247, 249, 252, .8);
  font-size: 15.5px;
  line-height: 1.78;
}

.page-home .closing__facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
  background: var(--hair-dark);
  border: var(--home-dark-line);
}

.page-home .closing__facts li {
  padding: 14px 16px 16px;
  background: rgba(7, 26, 50, .52);
  font-size: 13px;
  letter-spacing: .05em;
  color: rgba(247, 249, 252, .72);
}

.page-home .closing__facts .folio {
  display: block;
  margin-bottom: 6px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0;
}

.page-home .closing__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 26px;
}

.page-home .closing__link {
  font-size: 14px;
  font-weight: 600;
  color: var(--cyan-100);
  text-decoration: none;
  border-bottom: 1px solid rgba(168, 245, 234, .5);
  padding-bottom: 2px;
}

.page-home .closing__link:hover {
  color: var(--cyan-500);
}

.page-home .closing__art {
  position: relative;
  z-index: 1;
  margin: 0;
  border: var(--home-dark-line);
  background: rgba(7, 26, 50, .4);
}

.page-home .closing__art img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

/* ==========================================================
   响应式
   ========================================================== */

@media (min-width: 640px) {
  .page-home .standards__rail {
    grid-auto-flow: row;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    overflow-x: visible;
    padding-bottom: 0;
    gap: 0;
  }

  .page-home .std:nth-child(2n + 1) {
    border-left-width: 1px;
  }

  .page-home .std:nth-child(n + 3) {
    border-top-width: 0;
  }

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

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

@media (min-width: 900px) {
  .page-home .hero__canvas {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: center;
  }

  .page-home .hero__paths {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
    margin-top: 34px;
  }

  .page-home .path-card:nth-child(2) {
    transform: translateY(20px);
  }

  .page-home .path-card:nth-child(3) {
    transform: translateY(-12px);
  }

  .page-home .path-card:nth-child(4) {
    transform: translateY(26px);
  }

  .page-home .path-card:nth-child(2):hover,
  .page-home .path-card:nth-child(2):focus-visible {
    transform: translateY(16px);
  }

  .page-home .path-card:nth-child(3):hover,
  .page-home .path-card:nth-child(3):focus-visible {
    transform: translateY(-16px);
  }

  .page-home .path-card:nth-child(4):hover,
  .page-home .path-card:nth-child(4):focus-visible {
    transform: translateY(22px);
  }

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

  .page-home .std:nth-child(n + 5) {
    border-top-width: 0;
  }

  .page-home .std:nth-child(5),
  .page-home .std:nth-child(9) {
    border-left-width: 1px;
  }

  .page-home .install__flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
  }

  .page-home .install__node::after {
    content: "";
    position: absolute;
    left: 100%;
    top: 46px;
    width: 22px;
    border-top: 1px dashed var(--hair);
  }

  .page-home .install__node:last-child::after {
    display: none;
  }

  .page-home .quick__panel {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-home .closing__panel {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    align-items: center;
    gap: 40px;
  }
}

@media (min-width: 1100px) {
  .page-home .revisions__strip {
    grid-auto-columns: minmax(0, 1fr);
    overflow-x: visible;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .path-card,
  .page-home .path-card::before,
  .page-home .std,
  .page-home .std::after {
    transition: none;
  }

  .page-home .path-card:hover,
  .page-home .path-card:focus-visible,
  .page-home .path-card:nth-child(2),
  .page-home .path-card:nth-child(3),
  .page-home .path-card:nth-child(4) {
    transform: none;
  }
}
</main>