/* ============ 首页专属样式 · page-home ============ */
.page-home{
  --home-sec-pad: clamp(48px, 7vw, 88px);
  background: var(--am-paper);
  color: var(--am-ink);
  font-family: var(--am-font-body);
}

.page-home [id]{ scroll-margin-top: calc(var(--am-header-h) + 20px); }

/* ---------- 首屏框景 ---------- */
.page-home .home-hero{ padding: clamp(26px, 5vw, 54px) 0 0; }

.page-home .home-hero__frame{
  position: relative;
  border: 1px solid var(--am-tile);
  background: var(--am-white);
  padding: clamp(20px, 3.4vw, 46px);
  box-shadow: var(--am-shadow-s);
}
.page-home .home-hero__frame::before{
  content: "";
  position: absolute;
  inset: 9px;
  border: 1px solid rgba(31, 78, 156, 0.16);
  pointer-events: none;
}
.page-home .home-hero__corner{
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid var(--am-gold);
  z-index: 1;
}
.page-home .home-hero__corner--tl{ top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.page-home .home-hero__corner--tr{ top: -1px; right: -1px; border-left: 0; border-bottom: 0; }
.page-home .home-hero__corner--bl{ bottom: -1px; left: -1px; border-right: 0; border-top: 0; }
.page-home .home-hero__corner--br{ bottom: -1px; right: -1px; border-left: 0; border-top: 0; }

.page-home .home-hero__grid{
  display: grid;
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}

.page-home .home-hero__kicker{
  margin: 0;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--am-slate);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}
.page-home .home-hero__kicker .am-mono{
  color: var(--am-tile);
  padding: 3px 8px;
  border: 1px solid rgba(31, 78, 156, 0.28);
  font-size: 11.5px;
}

.page-home .home-hero__title{
  margin: 20px 0 0;
  font-family: var(--am-font-head);
  font-weight: 700;
  font-size: clamp(30px, 5.4vw, 52px);
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--am-ink);
}
.page-home .home-hero__lead{
  margin: 18px 0 0;
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.85;
  color: var(--am-ink-soft);
  max-width: 40em;
}
.page-home .home-hero__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}
.page-home .home-hero__band{
  height: 4px;
  width: min(300px, 62%);
  margin: 26px 0 0;
  background: linear-gradient(90deg,
    var(--am-tile) 0 54%,
    var(--am-gold) 54% 79%,
    var(--am-coral) 79% 100%);
}
.page-home .home-hero__facts{
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 26px;
  font-size: 13px;
  color: var(--am-slate);
}
.page-home .home-hero__facts li{
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
}
.page-home .home-hero__facts .am-mono{
  color: var(--am-ink);
  font-size: 13px;
}

.page-home .home-hero__media{
  margin: 0;
  position: relative;
  border: 1px solid var(--am-line-strong);
  background: var(--am-mist);
}
.page-home .home-hero__media img{
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.page-home .home-hero__media figcaption{
  display: block;
  padding: 10px 14px;
  font-size: 11.5px;
  color: var(--am-slate);
  border-top: 1px solid var(--am-line);
  background: var(--am-white);
}

/* ---------- 章节索引条 ---------- */
.page-home .home-index{
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 16px;
  padding: 8px;
  border: 1px solid var(--am-line);
  background: var(--am-white);
}
.page-home .home-index__item{
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 14px;
  font-size: 13.5px;
  color: var(--am-slate);
  text-decoration: none;
  border: 1px solid transparent;
  transition: background .22s var(--am-ease), color .22s var(--am-ease), border-color .22s var(--am-ease);
}
.page-home .home-index__item .am-mono{
  font-size: 11px;
  color: var(--am-gold);
}
.page-home .home-index__item:hover{
  background: var(--am-mist);
  color: var(--am-ink);
}
.page-home .home-index__item[aria-current="true"]{
  border-color: var(--am-tile);
  background: rgba(31, 78, 156, 0.07);
  color: var(--am-tile);
}

/* ---------- 章节通用 ---------- */
.page-home .home-sec{ padding: var(--home-sec-pad) 0; }

.page-home .home-sec__head{ max-width: 62em; }
.page-home .home-sec__index{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--am-gold);
}
.page-home .home-sec__index::before{
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--am-gold);
}
.page-home .home-sec__title{
  margin: 14px 0 0;
  font-family: var(--am-font-head);
  font-weight: 700;
  font-size: clamp(25px, 3.6vw, 38px);
  line-height: 1.28;
  color: var(--am-ink);
}
.page-home .home-sec__desc{
  margin: 16px 0 0;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--am-ink-soft);
}

.page-home .home-rule{
  height: 2px;
  margin: 0;
  background-image: repeating-linear-gradient(90deg,
    var(--am-tile) 0 3px,
    transparent 3px 12px);
  opacity: 0.45;
}

/* ---------- 目录区 ---------- */
.page-home .home-dirs__figure{
  margin: clamp(26px, 4vw, 40px) 0 0;
  border: 1px solid var(--am-line);
  background: var(--am-white);
}
.page-home .home-dirs__figure img{
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}
.page-home .home-dirs__figure figcaption{
  padding: 10px 14px;
  border-top: 1px solid var(--am-line);
  font-size: 11.5px;
  color: var(--am-slate);
}

.page-home .home-dirs__grid{
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 24px;
}

.page-home .home-card{
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 168px;
  padding: 22px;
  background: var(--am-white);
  border: 1px solid var(--am-line);
  color: inherit;
  text-decoration: none;
  transition: transform .26s var(--am-ease), border-color .26s var(--am-ease), box-shadow .26s var(--am-ease);
}
.page-home .home-card:hover,
.page-home .home-card:focus-visible{
  transform: translateY(-4px);
  border-color: var(--am-tile);
  box-shadow: var(--am-shadow-m);
  outline: none;
}
.page-home .home-card__index{
  font-family: var(--am-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.12em;
  color: var(--am-gold);
}
.page-home .home-card__title{
  margin: 0;
  font-family: var(--am-font-head);
  font-weight: 600;
  font-size: 20px;
  color: var(--am-ink);
}
.page-home .home-card__desc{
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--am-slate);
}
.page-home .home-card__foot{
  margin-top: auto;
  padding-top: 6px;
  font-family: var(--am-font-mono);
  font-size: 12px;
  color: var(--am-tile);
  opacity: 0;
  transform: translateY(4px);
  transition: opacity .26s var(--am-ease), transform .26s var(--am-ease);
}
.page-home .home-card:hover .home-card__foot,
.page-home .home-card:focus-visible .home-card__foot{
  opacity: 1;
  transform: none;
}

.page-home .home-card--lead{
  position: relative;
  overflow: hidden;
  background: var(--am-tile);
  border-color: var(--am-tile);
  min-height: 210px;
  justify-content: flex-end;
}
.page-home .home-card--lead::after{
  content: "";
  position: absolute;
  top: -28px;
  right: -28px;
  width: 168px;
  height: 168px;
  background-image: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.16) 0 3px, transparent 4px);
  background-size: 20px 20px;
  pointer-events: none;
}
.page-home .home-card--lead .home-card__index{ color: var(--am-gold); }
.page-home .home-card--lead .home-card__title{ color: var(--am-white); font-size: 24px; }
.page-home .home-card--lead .home-card__desc{ color: rgba(255, 255, 255, 0.84); font-size: 14.5px; max-width: 34em; }
.page-home .home-card--lead .home-card__foot{ color: var(--am-white); opacity: 1; transform: none; }
.page-home .home-card--lead:hover{ border-color: var(--am-deep); }

/* ---------- 三步找回 ---------- */
.page-home .home-steps{
  display: grid;
  gap: clamp(24px, 4vw, 40px);
  margin-top: clamp(28px, 4vw, 44px);
}
.page-home .home-steps__list{
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-home .home-step{
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 16px;
  padding: 20px 0;
  border-top: 1px solid var(--am-line);
}
.page-home .home-step:last-child{ border-bottom: 1px solid var(--am-line); }
.page-home .home-step__num{
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--am-tile);
  color: var(--am-white);
  font-size: 12px;
}
.page-home .home-step__title{
  margin: 3px 0 6px;
  font-family: var(--am-font-head);
  font-weight: 600;
  font-size: 18px;
  color: var(--am-ink);
}
.page-home .home-step__text{
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--am-ink-soft);
}
.page-home .home-steps__figure{
  margin: 0;
  align-self: start;
  border: 1px solid var(--am-line);
  background: var(--am-white);
}
.page-home .home-steps__figure img{
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-home .home-steps__figure figcaption{
  padding: 10px 14px;
  border-top: 1px solid var(--am-line);
  font-size: 11.5px;
  color: var(--am-slate);
}
.page-home .home-steps__note{
  margin: 26px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--am-ink-soft);
}
.page-home .home-steps__note a{
  color: var(--am-tile);
  text-decoration: none;
  border-bottom: 1px solid rgba(31, 78, 156, 0.4);
  padding-bottom: 1px;
}
.page-home .home-steps__note a:hover{ border-bottom-color: var(--am-tile); }

/* ---------- 更新与反馈 ---------- */
.page-home .home-sec--tile{
  background: var(--am-tile);
  color: var(--am-white);
}
.page-home .home-update{
  display: grid;
  gap: clamp(26px, 4vw, 44px);
  align-items: start;
}
.page-home .home-sec__index--onTile{ color: var(--am-gold); }
.page-home .home-sec__title--onTile{ color: var(--am-white); }
.page-home .home-sec__desc--onTile{ color: rgba(255, 255, 255, 0.84); }

.page-home .home-update__list{
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-home .home-update__list li{
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding-left: 14px;
  border-left: 2px solid rgba(255, 255, 255, 0.34);
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.92);
}
.page-home .home-update__list .am-mono{
  font-size: 12px;
  color: var(--am-gold);
}

.page-home .home-update__actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.page-home .home-btn--onTile{
  color: var(--am-white);
  border-color: rgba(255, 255, 255, 0.55);
  background: transparent;
}
.page-home .home-btn--onTile:hover{
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--am-white);
  color: var(--am-white);
}

.page-home .home-update__contact{
  margin: 22px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.78);
}

.page-home .home-update__figure{
  margin: 0;
  border: 1px solid rgba(255, 255, 255, 0.28);
  background: rgba(15, 43, 92, 0.34);
}
.page-home .home-update__figure img{
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}
.page-home .home-update__figure figcaption{
  padding: 10px 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 11.5px;
  color: rgba(255, 255, 255, 0.72);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px){
  .page-home .home-dirs__grid{ grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 900px){
  .page-home .home-hero__grid{ grid-template-columns: 1.12fr 0.88fr; }
  .page-home .home-steps{ grid-template-columns: 1fr 1fr; }
  .page-home .home-update{ grid-template-columns: 1.15fr 0.85fr; }
}

@media (min-width: 1000px){
  .page-home .home-dirs__grid{ grid-template-columns: repeat(3, 1fr); }
  .page-home .home-card--lead{ grid-column: span 2; }
}

@media (prefers-reduced-motion: reduce){
  .page-home .home-card,
  .page-home .home-card__foot,
  .page-home .home-index__item{
    transition: none;
  }
  .page-home .home-card:hover,
  .page-home .home-card:focus-visible{
    transform: none;
  }
}