.page-home {
  --home-cut: 20px;
  background:
    radial-gradient(120% 70% at 85% -5%, rgba(46, 211, 198, .12), transparent 62%),
    radial-gradient(90% 60% at -10% 18%, rgba(255, 107, 74, .10), transparent 58%),
    var(--sea-900);
  color: var(--fog);
  overflow-x: clip;
}

/* 上下文条 */
.home-context {
  padding: clamp(1rem, 2.5vw, 1.4rem) 0 .9rem;
  border-bottom: 1px solid var(--line-soft);
}
.home-context-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: .06em;
  color: var(--mist);
}
.home-context-line .mono {
  color: var(--sand);
}
.home-sep {
  opacity: .45;
}

/* 首屏 */
.home-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(1.6rem, 4vw, 2.6rem) 0 clamp(2.6rem, 6vw, 4.2rem);
}
.home-hero-art {
  position: absolute;
  inset: -8% -6% auto;
  height: 82%;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}
.home-hero-img {
  width: 100%;
  height: 100%;
  max-width: none;
  object-fit: cover;
  opacity: .32;
  -webkit-mask-image: radial-gradient(65% 70% at 72% 32%, #000 0%, rgba(0, 0, 0, .35) 46%, transparent 82%);
  mask-image: radial-gradient(65% 70% at 72% 32%, #000 0%, rgba(0, 0, 0, .35) 46%, transparent 82%);
}
.home-hero-grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
}
.home-hero-kicker {
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: .22em;
  color: var(--teal);
}
.home-hero-title {
  margin: .8rem 0 0;
  font-family: var(--ff-head);
  font-weight: 900;
  font-size: clamp(2.4rem, 7.2vw, 4.4rem);
  line-height: 1.05;
  letter-spacing: -.035em;
  color: var(--fog);
}
.home-hl {
  color: var(--coral);
}
.home-hero-lede {
  margin: 1.2rem 0 0;
  max-width: 35ch;
  font-size: var(--fs-16);
  line-height: 1.85;
  color: var(--mist);
}
.home-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.6rem;
}
.home-hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(7.5rem, 1fr));
  gap: 1rem;
  margin: 2rem 0 0;
  padding-top: 1.2rem;
  border-top: 1px solid var(--line-soft);
}
.home-hero-stats dt {
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--mist);
}
.home-hero-stats dd {
  margin: .4rem 0 0;
  font-size: var(--fs-14);
  color: var(--sand);
}

/* 三栏目切角索引卡 */
.home-index {
  display: grid;
  gap: 1rem;
  margin-top: .5rem;
}
.home-index-card {
  position: relative;
  display: block;
  padding: clamp(1.1rem, 2.6vw, 1.55rem);
  background: linear-gradient(152deg, rgba(22, 62, 87, .95), rgba(12, 42, 64, .98));
  text-decoration: none;
  color: var(--fog);
  clip-path: polygon(0 0, calc(100% - var(--home-cut)) 0, 100% var(--home-cut), 100% 100%, var(--home-cut) 100%, 0 calc(100% - var(--home-cut)));
  transition: background .28s var(--ease), transform .28s var(--ease);
}
.home-index-card:hover {
  background: linear-gradient(152deg, rgba(22, 62, 87, 1), rgba(22, 62, 87, .88));
  transform: translateY(-3px);
}
.home-index-card:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--teal);
}
.home-index-num {
  display: block;
  font-size: var(--fs-12);
  letter-spacing: .16em;
  color: var(--teal);
}
.home-index-title {
  margin: .5rem 0 0;
  font-size: var(--fs-20);
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--fog);
}
.home-index-desc {
  margin: .55rem 0 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--mist);
}
.home-index-foot {
  display: block;
  margin-top: .9rem;
  font-size: var(--fs-12);
  letter-spacing: .06em;
  color: var(--sand);
}

/* 章节骨架 */
.home-section {
  padding: clamp(2.5rem, 6vw, 4.4rem) 0;
}
.home-section--situations {
  border-top: 1px solid var(--line-soft);
}
.home-section--ledger {
  background: linear-gradient(180deg, rgba(12, 42, 64, .92), rgba(12, 42, 64, .28));
}
.home-section--notes {
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}
.home-section--first {
  background: linear-gradient(158deg, rgba(255, 107, 74, .10), transparent 58%);
}
.home-section--local {
  background: linear-gradient(200deg, rgba(46, 211, 198, .09), transparent 55%);
}
.home-section-head {
  display: grid;
  gap: .6rem;
  margin-bottom: clamp(1.5rem, 3.5vw, 2.5rem);
}
.home-section-index {
  margin: 0;
  font-size: var(--fs-14);
  letter-spacing: .18em;
  color: var(--coral);
}
.home-section-title {
  margin: 0;
  font-family: var(--ff-head);
  font-size: var(--fs-36);
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -.02em;
  color: var(--fog);
}
.home-section-lede {
  margin: 0;
  font-size: var(--fs-16);
  line-height: 1.8;
  color: var(--mist);
}

/* 通用图像框 */
.home-figure {
  margin: 0;
  position: relative;
}
.home-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  clip-path: polygon(0 0, calc(100% - var(--home-cut)) 0, 100% var(--home-cut), 100% 100%, 0 100%);
}
.home-figure--tall img {
  aspect-ratio: 4 / 3;
}
.home-figure--device img {
  aspect-ratio: 3 / 2;
}
.home-figure-cap {
  margin-top: .7rem;
  font-size: var(--fs-12);
  letter-spacing: .08em;
  color: var(--mist);
}

/* 01 三步 */
.home-route-grid,
.home-ledger-grid,
.home-first-grid,
.home-local-grid {
  display: grid;
  gap: clamp(1.5rem, 3.5vw, 2.5rem);
}
.home-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}
.home-step {
  position: relative;
  padding: 0 0 1.4rem 1.6rem;
  border-left: 1px solid var(--line);
}
.home-step:last-child {
  padding-bottom: 0;
}
.home-step::before {
  content: "";
  position: absolute;
  left: -4px;
  top: .55rem;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 0 3px rgba(46, 211, 198, .16);
}
.home-step-num {
  display: block;
  font-size: var(--fs-12);
  letter-spacing: .16em;
  color: var(--sand);
}
.home-step-title {
  margin: .4rem 0 0;
  font-size: var(--fs-20);
  font-weight: 800;
  color: var(--fog);
}
.home-step-text {
  margin: .5rem 0 0;
  max-width: 46ch;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--mist);
}

/* 02 处境条目 */
.home-situations {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}
.home-situation {
  display: grid;
  gap: .55rem 1.5rem;
  padding: clamp(1.1rem, 2.6vw, 1.6rem) 0;
  border-top: 1px solid var(--line-soft);
}
.home-situation:last-child {
  border-bottom: 1px solid var(--line-soft);
}
.home-situation-num {
  font-size: var(--fs-28);
  font-weight: 700;
  letter-spacing: .06em;
  color: transparent;
  -webkit-text-stroke: 1px var(--line-strong);
  line-height: 1;
}
.home-situation-title {
  margin: 0;
  font-size: var(--fs-20);
  font-weight: 800;
  line-height: 1.4;
  color: var(--fog);
}
.home-situation-text {
  margin: .45rem 0 0;
  max-width: 50ch;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--mist);
}
.home-situation-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: .55rem;
}
.home-link {
  display: inline-flex;
  align-items: center;
  gap: .35rem;
  padding-bottom: .1rem;
  font-size: var(--fs-14);
  color: var(--coral);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 107, 74, .45);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.home-link:hover,
.home-link:focus-visible {
  color: var(--fog);
  border-color: var(--fog);
}

/* 03 节点手风琴 */
.home-nodes {
  display: grid;
  gap: .85rem;
}
.home-node {
  background: rgba(7, 28, 44, .72);
  border-left: 2px solid var(--teal);
  transition: background .25s var(--ease);
}
.home-node[open] {
  background: rgba(22, 62, 87, .82);
}
.home-node-summary {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: 1rem 1rem .95rem;
  cursor: pointer;
  list-style: none;
}
.home-node-summary::-webkit-details-marker {
  display: none;
}
.home-node-summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--ff-mono);
  font-size: 1.05rem;
  color: var(--teal);
}
.home-node[open] .home-node-summary::after {
  content: "−";
}
.home-node-num {
  font-size: var(--fs-12);
  letter-spacing: .14em;
  color: var(--teal);
}
.home-node-title {
  font-size: var(--fs-16);
  font-weight: 800;
  color: var(--fog);
}
.home-node-text {
  margin: 0;
  padding: 0 1rem 1.1rem;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--mist);
}
.home-ledger-foot {
  margin: clamp(1.4rem, 3vw, 2rem) 0 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--mist);
}

/* 04 更新公告 */
.home-news {
  display: grid;
}
.home-news-item {
  border-top: 1px solid var(--line-soft);
}
.home-news-item:last-of-type {
  border-bottom: 1px solid var(--line-soft);
}
.home-news-item summary {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 0;
  cursor: pointer;
  list-style: none;
}
.home-news-item summary::-webkit-details-marker {
  display: none;
}
.home-news-title {
  flex: 1 1 auto;
  margin: 0;
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--fog);
}
.home-news-tag {
  flex: 0 0 auto;
  font-size: var(--fs-12);
  letter-spacing: .06em;
  color: var(--sand);
}
.home-news-item summary::after {
  content: "+";
  flex: 0 0 auto;
  width: 1.4rem;
  text-align: center;
  font-family: var(--ff-mono);
  font-size: 1.1rem;
  color: var(--teal);
}
.home-news-item[open] summary::after {
  content: "−";
}
.home-news-text {
  margin: 0 0 1.1rem;
  max-width: 62ch;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--mist);
}
.home-news-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.6rem;
}

/* 05 首次访问 */
.home-first-steps .home-step-num {
  color: var(--coral);
}
.home-copy {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  margin-top: 1.5rem;
  padding: .6rem 1.15rem;
  font-family: var(--ff-body);
  font-size: var(--fs-14);
  color: var(--fog);
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--pill);
  cursor: pointer;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.home-copy:hover,
.home-copy:focus-visible,
.home-copy.is-done {
  color: var(--teal);
  border-color: var(--teal);
}

/* 06 联系 */
.home-contact-list {
  margin: 0;
  display: grid;
  gap: 1rem;
}
.home-contact-list > div {
  padding-bottom: .9rem;
  border-bottom: 1px solid var(--line-soft);
}
.home-contact-list dt {
  font-size: var(--fs-12);
  letter-spacing: .1em;
  color: var(--mist);
}
.home-contact-list dd {
  margin: .35rem 0 0;
  font-size: var(--fs-16);
  line-height: 1.6;
  color: var(--fog);
  word-break: break-word;
}
.home-contact-list dd.mono {
  color: var(--sand);
}
.home-team-text {
  margin: 0 0 1rem;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--mist);
}
.home-local-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.4rem;
}

/* 窄屏优先的中断点 */
@media (max-width: 520px) {
  .home-hero-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .home-situation {
    grid-template-columns: auto minmax(0, 1fr);
  }
  .home-situation-meta {
    grid-column: 1 / -1;
    flex-direction: row;
    align-items: center;
    flex-wrap: wrap;
  }
}

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

@media (min-width: 820px) {
  .home-section-head {
    grid-template-columns: 3.5rem minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
    gap: 0 1.5rem;
  }
  .home-situation {
    grid-template-columns: 4rem minmax(0, 1fr) 14rem;
    align-items: start;
  }
}

@media (min-width: 900px) {
  .home-hero-grid {
    grid-template-columns: 7fr 5fr;
    align-items: start;
  }
  .home-index {
    margin-top: 0;
  }
  .home-index-card--b {
    margin-top: 2rem;
  }
  .home-index-card--c {
    margin-top: 4rem;
  }
  .home-route-grid {
    grid-template-columns: 5fr 7fr;
    align-items: center;
  }
  .home-ledger-grid {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }
  .home-first-grid {
    grid-template-columns: 7fr 5fr;
    align-items: center;
  }
  .home-local-grid {
    grid-template-columns: 5fr 7fr;
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .home-nodes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .home-index-card,
  .home-node,
  .home-link,
  .home-copy {
    transition: none;
  }
  .home-index-card:hover {
    transform: none;
  }
}