.page-home {
  display: block;
  background: var(--ink);
}

/* ---------- 首屏 ---------- */
.page-home .hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + 48px) 0 68px;
  background: var(--ink);
}

.page-home .hero__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
}

.page-home .hero__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
}

.page-home .hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(115% 78% at 84% 8%, rgba(108, 59, 244, 0.3), transparent 60%),
    radial-gradient(75% 60% at 8% 100%, rgba(46, 124, 246, 0.16), transparent 62%),
    linear-gradient(180deg, rgba(6, 7, 13, 0.6) 0%, rgba(6, 7, 13, 0.88) 64%, var(--ink) 100%);
}

.page-home .hero__trace {
  position: absolute;
  top: 6%;
  right: -8%;
  z-index: -1;
  width: 155%;
  height: 1px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    rgba(108, 59, 244, 0.55) 30%,
    rgba(53, 240, 208, 0.8) 62%,
    transparent 100%
  );
  transform: rotate(12deg);
  transform-origin: right center;
  pointer-events: none;
  opacity: 0.8;
}

.page-home .hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 44px;
}

.page-home .hero__kicker {
  margin: 0 0 18px;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-home .hero__title {
  margin: 0 0 22px;
  font-size: clamp(34px, 7.4vw, 84px);
  font-weight: 300;
  line-height: 1.07;
  letter-spacing: -0.03em;
  color: var(--paper);
  text-wrap: balance;
}

.page-home .hero__lead {
  margin: 0 0 30px;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mute);
}

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

/* 首屏索引条 */
.page-home .hero__index {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(21, 14, 43, 0.74);
  padding: 16px 14px 12px;
  box-shadow: 0 6px 12px rgba(6, 7, 13, 0.55);
}

.page-home .hero__index-head {
  margin: 0 0 8px;
  padding: 0 12px;
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--mute);
}

.page-home .hero__index-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-home .hero-index-item + .hero-index-item {
  border-top: 1px solid var(--line-soft);
}

.page-home .hero-index-item a {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr) 16px;
  grid-template-areas:
    "num name arrow"
    "num desc arrow";
  column-gap: 14px;
  align-items: center;
  padding: 12px;
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--paper);
  box-shadow: inset 0 0 0 1px transparent;
  transition: box-shadow 0.22s ease, background-color 0.22s ease;
}

.page-home .hero-index-item a:hover,
.page-home .hero-index-item a:focus-visible {
  background-color: rgba(53, 240, 208, 0.06);
  box-shadow: inset 0 0 0 1px var(--line-cyan);
}

.page-home .hero-index-num {
  grid-area: num;
  align-self: center;
  font-size: 15px;
  letter-spacing: 0.08em;
  color: var(--blue);
}

.page-home .hero-index-name {
  grid-area: name;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.4;
}

.page-home .hero-index-desc {
  grid-area: desc;
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--mute);
}

.page-home .hero-index-item a::after {
  content: "";
  grid-area: arrow;
  justify-self: end;
  width: 7px;
  height: 7px;
  border-top: 1px solid var(--mute);
  border-right: 1px solid var(--mute);
  transform: rotate(45deg);
  transition: border-color 0.22s ease, transform 0.22s ease;
}

.page-home .hero-index-item a:hover::after,
.page-home .hero-index-item a:focus-visible::after {
  border-color: var(--cyan);
  transform: rotate(45deg) translate(2px, -2px);
}

.page-home .hero-index-item--pinned a {
  background-color: rgba(53, 240, 208, 0.05);
  box-shadow: inset 0 0 0 1px rgba(53, 240, 208, 0.3);
}

.page-home .hero-index-item--pinned .hero-index-name {
  font-size: 21px;
  color: var(--cyan);
  letter-spacing: -0.01em;
}

/* ---------- 通用章节 ---------- */
.page-home .section {
  position: relative;
  padding: 64px 0;
  border-top: 1px solid var(--line-soft);
}

.page-home .section-head {
  margin-bottom: 38px;
  max-width: 46ch;
}

.page-home .section-kicker {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--violet);
}

.page-home .section-title {
  margin: 0;
  font-size: clamp(23px, 3.2vw, 31px);
  font-weight: 600;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--paper);
}

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

.page-home .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius);
}

/* ---------- 首页栏目置顶索引区 ---------- */
.page-home .pinned__grid {
  display: grid;
  gap: 32px;
}

.page-home .pinned__main p {
  margin: 0 0 18px;
  max-width: 44ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mute);
}

.page-home .pinned__facts {
  list-style: none;
  margin: 0 0 28px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 14px 28px;
}

.page-home .pinned__facts li {
  border-left: 2px solid var(--violet);
  padding-left: 12px;
}

.page-home .pinned__facts strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--paper);
  line-height: 1.2;
}

.page-home .pinned__facts span {
  display: block;
  margin-top: 4px;
  font-size: 12.5px;
  color: var(--mute);
}

/* ---------- 三步走法 ---------- */
.page-home .steps__grid {
  display: grid;
  gap: 34px;
}

.page-home .steps__timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-home .timeline-item {
  position: relative;
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  column-gap: 22px;
  padding: 26px 0;
  border-top: 1px solid var(--line-soft);
}

.page-home .timeline-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-home .timeline-index {
  font-size: 22px;
  line-height: 1;
  letter-spacing: 0.08em;
  padding-top: 3px;
  color: var(--mute);
  transition: color 0.24s ease;
}

.page-home .timeline-item.is-visible .timeline-index {
  color: var(--cyan);
}

.page-home .timeline-body h3 {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 600;
  color: var(--paper);
}

.page-home .timeline-body p {
  margin: 0;
  max-width: 42ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mute);
}

.page-home .steps__hint {
  margin-top: 8px;
  padding-left: 14px;
  border-left: 1px solid var(--line-cyan);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.02em;
  transition: transform 0.24s ease, border-color 0.24s ease;
}

.page-home .timeline-item:hover .steps__hint {
  transform: translateX(4px);
  border-color: var(--cyan);
}

/* ---------- 回访导出 ---------- */
.page-home .export {
  background:
    radial-gradient(90% 70% at 88% 4%, rgba(255, 138, 61, 0.14), transparent 62%),
    var(--ink-2);
  border-top-color: transparent;
}

.page-home .export__panel {
  display: grid;
  gap: 28px;
}

.page-home .export__intro p {
  margin: 0 0 20px;
  max-width: 42ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mute);
}

.page-home .export__meta {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-home .export__meta li {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--amber);
  border: 1px solid rgba(255, 138, 61, 0.3);
  border-radius: var(--radius);
  padding: 5px 10px;
}

.page-home .export__steps {
  margin-top: 34px;
  display: grid;
  gap: 10px;
}

.page-home .export__steps details {
  border: 1px solid rgba(255, 138, 61, 0.26);
  border-radius: var(--radius);
  background: rgba(255, 138, 61, 0.05);
  padding: 0 16px;
}

.page-home .export__steps summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 0;
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--paper);
  cursor: pointer;
  list-style: none;
  transition: color 0.2s ease;
}

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

.page-home .export__steps summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--amber);
  transition: transform 0.22s ease;
}

.page-home .export__steps details[open] summary::after {
  content: "–";
}

.page-home .export__steps summary:hover {
  color: var(--amber);
}

.page-home .export__steps summary .mono {
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--amber);
}

.page-home .export__steps p {
  margin: 0 0 16px;
  padding-left: 30px;
  max-width: 52ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mute);
}

/* ---------- 版本与更新 ---------- */
.page-home .version__panel {
  display: grid;
  gap: 24px;
  padding: 26px;
}

.page-home .version__num {
  display: block;
  font-size: clamp(28px, 5vw, 42px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--paper-ink);
}

.page-home .version__label {
  display: block;
  margin-top: 8px;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: rgba(22, 18, 31, 0.62);
}

.page-home .version__body > p {
  margin: 0 0 20px;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper-ink);
}

.page-home .version__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-home .version__list li {
  display: grid;
  grid-template-columns: 68px minmax(0, 1fr);
  gap: 16px;
  align-items: baseline;
  padding-top: 14px;
  border-top: 1px solid rgba(22, 18, 31, 0.16);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--paper-ink);
}

.page-home .version__list li + li {
  margin-top: 14px;
}

.page-home .version__list .mono {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: #4a3f6b;
}

.page-home .version__link {
  margin: 22px 0 0;
  font-size: 14.5px;
}

.page-home .version__link a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
  padding-bottom: 2px;
}

.page-home .version__link a:hover {
  border-bottom-color: var(--cyan);
}

/* ---------- 支持与联系 ---------- */
.page-home .support {
  padding-bottom: 88px;
}

.page-home .support__grid {
  display: grid;
  gap: 30px;
}

.page-home .support__intro .section-title {
  margin-bottom: 16px;
}

.page-home .support__intro > p {
  margin: 0 0 26px;
  max-width: 44ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mute);
}

.page-home .support__channels {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(21, 14, 43, 0.6);
}

.page-home .support__channels li {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 15px 18px;
}

.page-home .support__channels li + li {
  border-top: 1px solid var(--line-soft);
}

.page-home .support__label {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-home .support__value {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--paper);
  word-break: break-word;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-home .export__steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }
}

@media (min-width: 860px) {
  .page-home .support__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    column-gap: 8%;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-home .hero {
    padding: calc(var(--header-h) + 64px) 0 96px;
  }

  .page-home .hero__inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6.4fr);
    column-gap: 7%;
    align-items: start;
  }

  .page-home .hero__index {
    padding: 18px 16px 14px;
  }

  .page-home .section {
    padding: 96px 0;
  }

  .page-home .section-head {
    margin-bottom: 48px;
  }

  .page-home .pinned__grid {
    grid-template-columns: minmax(0, 5.4fr) minmax(0, 6.6fr);
    column-gap: 7%;
    align-items: center;
  }

  .page-home .steps__grid {
    grid-template-columns: minmax(0, 6.4fr) minmax(0, 3.4fr);
    column-gap: 8%;
    align-items: start;
  }

  .page-home .timeline-item {
    grid-template-columns: 52px minmax(0, 1fr);
    column-gap: 64px;
  }

  .page-home .export__panel {
    grid-template-columns: minmax(0, 6.4fr) minmax(0, 4.6fr);
    column-gap: 7%;
    align-items: center;
  }

  .page-home .export__steps {
    margin-top: 44px;
  }

  .page-home .version__panel {
    grid-template-columns: 210px minmax(0, 1fr);
    column-gap: 44px;
    padding: 40px;
    align-items: start;
  }

  .page-home .support {
    padding-bottom: 112px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .hero-index-item a,
  .page-home .hero-index-item a::after,
  .page-home .timeline-index,
  .page-home .steps__hint,
  .page-home .export__steps summary::after {
    transition: none;
  }

  .page-home .timeline-item:hover .steps__hint {
    transform: none;
  }
}