.page-home {
  position: relative;
  background-color: var(--ink-950);
  color: var(--text-hi);
  font-family: var(--f-sans);
  font-size: 17px;
  line-height: 1.8;
  overflow-x: hidden;
  background-image:
    linear-gradient(to right, var(--hairline-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--hairline-soft) 1px, transparent 1px);
  background-size: var(--cell) var(--cell);
}

.page-home h2 {
  margin: 0;
  font-size: clamp(22px, 3vw, 32px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--text-hi);
}

.page-home .section-code {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan-400);
}

.page-home .section-lede {
  margin: 14px 0 0;
  font-size: 17px;
  line-height: 1.8;
  font-weight: 450;
  color: var(--text-md);
  max-width: 62ch;
}

.page-home .section-gap {
  padding-top: clamp(40px, 6vw, 76px);
}

/* ---------- 首屏分屏 ---------- */
.page-home .hero {
  padding: 16px 0 clamp(36px, 5vw, 56px);
}

.page-home .hero__inner {
  display: grid;
  gap: 32px;
}

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

.page-home .hero__narrative h1 {
  margin: 0;
  font-size: clamp(32px, 8vw, 64px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--text-hi);
}

.page-home .hero__lede {
  margin: 18px 0 0;
  font-size: 17px;
  line-height: 1.8;
  font-weight: 450;
  color: var(--text-md);
  max-width: 62ch;
}

.page-home .hero__lede--tight {
  margin-top: 12px;
  color: var(--text-lo);
}

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

.page-home .hero__actions .btn {
  font-size: 15px;
}

.page-home .hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  margin: 30px 0 0;
  background: var(--hairline);
  border: 1px solid var(--hairline);
}

.page-home .fact {
  flex: 1 1 120px;
  min-width: 0;
  background: var(--ink-800);
  padding: 14px 16px;
}

.page-home .fact dt {
  font-size: 13px;
  color: var(--text-lo);
  letter-spacing: 0.02em;
}

.page-home .fact dd {
  margin: 4px 0 0;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

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

/* ---------- 纯 CSS / SVG 索引面板 ---------- */
.page-home .panel {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 340px;
  border: 1px solid var(--hairline);
  background: var(--ink-800);
  overflow: hidden;
}

.page-home .panel__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.42;
}

.page-home .panel__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(20, 210, 200, 0.12) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(20, 210, 200, 0.12) 1px, transparent 1px);
  background-size: 8px 8px;
  pointer-events: none;
}

.page-home .panel__paths {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

.page-home .panel__paths path {
  fill: none;
  stroke: var(--cyan-400);
  stroke-width: 1;
  stroke-dasharray: 6 5;
  opacity: 0.6;
  vector-effect: non-scaling-stroke;
}

.page-home .panel__rows {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 10px;
  padding: clamp(18px, 3vw, 30px);
}

.page-home .prow {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 12px;
  align-items: center;
  border: 1px solid var(--hairline);
  background: rgba(7, 22, 38, 0.74);
  padding: 10px 12px;
}

.page-home .pno {
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--lemon-300);
}

.page-home .pbar {
  display: block;
  height: 6px;
  background: linear-gradient(90deg, var(--orange-500), var(--cyan-400));
}

.page-home .prow:nth-child(1) .pbar { width: 62%; }
.page-home .prow:nth-child(2) .pbar { width: 84%; }
.page-home .prow:nth-child(3) .pbar { width: 46%; }
.page-home .prow:nth-child(4) .pbar { width: 72%; }
.page-home .prow:nth-child(5) .pbar { width: 38%; }

.page-home .panel__caption {
  position: relative;
  z-index: 2;
  margin: 0;
  padding: 10px clamp(18px, 3vw, 30px) 14px;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--cyan-400);
  border-top: 1px solid var(--hairline);
}

/* ---------- 分类标签带 ---------- */
.page-home .tagband {
  padding: clamp(36px, 5vw, 64px) 0 clamp(32px, 4vw, 52px);
  background: var(--ink-800);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.page-home .bandstrip {
  margin: 0 0 24px;
  border: 1px solid var(--hairline);
  overflow: hidden;
}

.page-home .bandstrip img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 180px;
  object-fit: cover;
}

.page-home .tagband__head::after {
  content: "";
  display: block;
  width: 72px;
  height: 2px;
  margin-top: 18px;
  background: linear-gradient(90deg, var(--orange-500), var(--cyan-400));
}

.page-home .taglist {
  display: flex;
  gap: 10px;
  margin: 22px 0 0;
  padding: 0 0 12px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--orange-500) transparent;
}

.page-home .taglist::-webkit-scrollbar {
  height: 4px;
}

.page-home .taglist::-webkit-scrollbar-thumb {
  background: var(--orange-500);
}

.page-home .taglist > li {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

.page-home .tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 11px 16px;
  border: 1px solid var(--line-200);
  background: transparent;
  color: var(--text-hi);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: -0.01em;
  text-decoration: none;
  white-space: nowrap;
  transition: background var(--ease), color var(--ease), border-color var(--ease);
}

.page-home .tag__no {
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--lemon-300);
  transition: color var(--ease);
}

.page-home .taglist li:nth-child(odd) .tag { border-color: rgba(255, 106, 26, 0.55); }
.page-home .taglist li:nth-child(even) .tag { border-color: rgba(20, 210, 200, 0.55); }

.page-home .tag:hover,
.page-home .tag:focus-visible {
  background: var(--orange-500);
  border-color: var(--orange-500);
  color: var(--ink-950);
}

.page-home .tag:hover .tag__no,
.page-home .tag:focus-visible .tag__no {
  color: var(--ink-950);
}

.page-home .taglist:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 4px;
}

/* ---------- 索引摘要 ---------- */
.page-home .idx__list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  border-top: 1px solid var(--hairline);
}

.page-home .idx__link {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 12px;
  border-bottom: 1px solid var(--hairline);
  border-left: 2px solid transparent;
  text-decoration: none;
  color: var(--text-hi);
  transition: border-color var(--ease), background var(--ease);
}

.page-home .idx__no {
  display: inline-block;
  align-self: start;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--lemon-300);
  border: 1px solid transparent;
  padding: 1px 6px;
  transition: background var(--ease), color var(--ease), border-color var(--ease);
}

.page-home .idx__name {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -0.01em;
  transition: color var(--ease);
}

.page-home .idx__desc {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-md);
}

.page-home .idx__link:hover,
.page-home .idx__link:focus-visible {
  border-left-color: var(--orange-500);
  background: rgba(20, 210, 200, 0.05);
}

.page-home .idx__link:hover .idx__name,
.page-home .idx__link:focus-visible .idx__name {
  color: var(--cyan-400);
}

.page-home .idx__link:hover .idx__no,
.page-home .idx__link:focus-visible .idx__no {
  background: var(--orange-500);
  border-color: var(--orange-500);
  color: var(--ink-950);
}

.page-home .idx__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 24px;
}

.page-home .idx__hint {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--text-lo);
}

/* ---------- 旁注 ---------- */
.page-home .aside-box {
  border: 1px solid var(--hairline);
  background: var(--ink-800);
  padding: 20px;
}

.page-home .aside-box + .aside-box {
  margin-top: 16px;
}

.page-home .aside-box--quiet {
  background: transparent;
  border-color: var(--hairline-soft);
}

.page-home .aside-box__title {
  margin: 0 0 12px;
  font-size: 15px;
  letter-spacing: 0;
  font-weight: 700;
  color: var(--cyan-400);
}

.page-home .aside-box__list {
  margin: 0;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-md);
}

.page-home .aside-box__list--plain {
  list-style: none;
  padding-left: 0;
}

.page-home .aside-box__list--plain li {
  position: relative;
  padding-left: 14px;
  margin-bottom: 8px;
}

.page-home .aside-box__list--plain li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 1px;
  background: var(--mint-400);
}

.page-home .aside-box__list li + li {
  margin-top: 8px;
}

.page-home .aside-box__link {
  display: inline-block;
  margin-top: 14px;
  font-size: 15px;
  color: var(--cyan-400);
  text-decoration: underline;
  text-underline-offset: 4px;
  transition: color var(--ease);
}

.page-home .aside-box__link:hover,
.page-home .aside-box__link:focus-visible {
  color: var(--orange-500);
}

.page-home .aside-box__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-md);
}

.page-home .aside-box__links {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
}

.page-home .aside-box__links li + li {
  margin-top: 6px;
}

.page-home .aside-box__links a {
  font-size: 15px;
  color: var(--text-hi);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-400);
  transition: color var(--ease), border-color var(--ease);
}

.page-home .aside-box__links a:hover,
.page-home .aside-box__links a:focus-visible {
  color: var(--cyan-400);
  border-color: var(--orange-500);
}

.page-home .aside-box__meta {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--hairline);
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--mint-400);
}

/* ---------- 连续性 ---------- */
.page-home .flow {
  padding: clamp(44px, 6vw, 80px) 0;
  background: var(--ink-800);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.page-home .flow__head {
  max-width: 62ch;
}

.page-home .flow__grid {
  margin-top: 32px;
}

.page-home .flow__figure {
  margin: 0 0 26px;
  border: 1px solid var(--hairline);
  background: var(--ink-950);
  overflow: hidden;
}

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

.page-home .flow__caption {
  margin: 0;
  padding: 10px 14px;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--text-lo);
  border-top: 1px solid var(--hairline);
}

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

.page-home .step {
  background: var(--ink-950);
  padding: 22px 20px;
}

.page-home .step__no {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--ink-950);
  background: var(--lemon-300);
  padding: 2px 7px;
}

.page-home .step__title {
  margin: 12px 0 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-hi);
}

.page-home .step__text {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-md);
}

/* 设备切换 */
.page-home .devices {
  position: relative;
  margin-top: 26px;
  border: 1px solid var(--hairline);
  background: var(--ink-950);
  padding: 18px;
}

.page-home .devices__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-home .devices__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.page-home .devices__tab {
  display: inline-block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-md);
  border: 1px solid var(--line-200);
  cursor: pointer;
  transition: background var(--ease), color var(--ease), border-color var(--ease);
}

.page-home #dev-phone:checked ~ .devices__tabs label[for="dev-phone"],
.page-home #dev-tablet:checked ~ .devices__tabs label[for="dev-tablet"] {
  background: var(--orange-500);
  border-color: var(--orange-500);
  color: var(--ink-950);
}

.page-home #dev-phone:focus-visible ~ .devices__tabs label[for="dev-phone"],
.page-home #dev-tablet:focus-visible ~ .devices__tabs label[for="dev-tablet"] {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
}

.page-home .device-panel {
  display: none;
  border-left: 2px solid var(--cyan-400);
  padding-left: 16px;
}

.page-home #dev-phone:checked ~ .devices__panels .device-panel--phone,
.page-home #dev-tablet:checked ~ .devices__panels .device-panel--tablet {
  display: block;
}

.page-home .device-panel__code {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--cyan-400);
}

.page-home .device-panel__text {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-md);
  max-width: 62ch;
}

.page-home .flow__path {
  margin: 32px 0 0;
  border: 1px solid var(--hairline);
  background: var(--ink-950);
  overflow: hidden;
}

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

/* ---------- 最近更新 ---------- */
.page-home .updates {
  padding: clamp(44px, 6vw, 80px) 0 clamp(56px, 7vw, 96px);
}

.page-home .updates__list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  border-top: 1px solid var(--hairline);
}

.page-home .updates__item {
  border-bottom: 1px solid var(--hairline);
}

.page-home .updates__link {
  display: grid;
  gap: 6px;
  padding: 18px 12px;
  text-decoration: none;
  color: var(--text-hi);
  border-left: 2px solid transparent;
  transition: border-color var(--ease), background var(--ease);
}

.page-home .updates__when {
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--violet-600);
}

.page-home .updates__text {
  font-size: 17px;
  font-weight: 500;
  line-height: 1.75;
  max-width: 62ch;
  transition: color var(--ease);
}

.page-home .updates__more {
  margin: 0;
  padding: 0 12px;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-md);
  transition: max-height var(--ease), opacity var(--ease), padding var(--ease);
}

.page-home .updates__item:hover .updates__link,
.page-home .updates__item:focus-within .updates__link {
  border-left-color: var(--orange-500);
  background: rgba(255, 106, 26, 0.05);
}

.page-home .updates__item:hover .updates__text,
.page-home .updates__item:focus-within .updates__text {
  color: var(--cyan-400);
}

.page-home .updates__item:hover .updates__more,
.page-home .updates__item:focus-within .updates__more {
  max-height: 80px;
  opacity: 1;
  padding-bottom: 16px;
}

.page-home .updates .btn {
  margin-top: 28px;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-home .flow__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-home .idx__link {
    grid-template-columns: 112px minmax(0, 1fr);
    gap: 4px 18px;
    align-items: start;
    padding: 16px 14px;
  }

  .page-home .idx__no {
    grid-column: 1;
    grid-row: 1 / span 2;
  }

  .page-home .idx__name {
    grid-column: 2;
    grid-row: 1;
  }

  .page-home .idx__desc {
    grid-column: 2;
    grid-row: 2;
  }

  .page-home .devices {
    padding: 22px 24px;
  }
}

@media (min-width: 1024px) {
  .page-home .hero__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 0;
    align-items: start;
  }

  .page-home .hero__narrative {
    padding-right: clamp(24px, 3vw, 48px);
  }

  .page-home .hero__visual {
    border-left: 1px solid var(--cyan-400);
    padding-left: clamp(24px, 3vw, 48px);
  }

  .page-home .panel {
    min-height: 460px;
  }

  .page-home .bandstrip img {
    max-height: 200px;
  }
}

@media (min-width: 1200px) {
  .page-home .hero__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }

  .page-home .panel {
    min-height: 520px;
  }
}

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