/* ==========================================================
   首页 · 星图索引与板块流
   作用域：.page-home
   ========================================================== */

.page-home {
  --home-cut: 16px;
}

.page-home .shell {
  width: 100%;
}

/* ---------- 首屏：星云铺底 + 主题声明 + 引力点 ---------- */

.page-home .home-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(3rem, 8vw, 6rem) 0 clamp(4rem, 9vw, 7rem);
  background:
    radial-gradient(115% 85% at 8% -10%, rgba(107, 75, 214, 0.48), transparent 60%),
    radial-gradient(95% 75% at 94% 4%, rgba(63, 201, 232, 0.30), transparent 58%),
    var(--ink);
}

.page-home .home-hero__nebula {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.48;
  pointer-events: none;
}

.page-home .home-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(58% 52% at 46% 38%, rgba(6, 7, 13, 0.74), transparent 72%),
    linear-gradient(180deg, rgba(6, 7, 13, 0.30) 0%, rgba(6, 7, 13, 0.04) 38%, rgba(6, 7, 13, 0.94) 94%);
}

.page-home .home-hero__shell {
  position: relative;
  z-index: 2;
}

.page-home .home-hero__inner {
  max-width: 52rem;
}

.page-home .home-hero__eyebrow {
  color: var(--mist);
}

.page-home .home-hero__title {
  max-width: 19ch;
  margin: 0.65rem 0 0;
}

.page-home .home-hero__lede {
  max-width: 36rem;
  margin-top: 1.25rem;
  color: rgba(243, 238, 228, 0.82);
}

.page-home .home-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin: 1.75rem 0 0;
  padding: 0;
  list-style: none;
}

.page-home .home-hero__chip {
  padding: 0.35rem 0.8rem;
  border: 1px solid var(--line-strong);
  background: var(--veil);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--mist);
  clip-path: polygon(7px 0, 100% 0, 100% calc(100% - 7px), calc(100% - 7px) 100%, 0 100%, 0 7px);
}

.page-home .home-hero__chip--gold {
  border-color: rgba(233, 183, 93, 0.55);
  color: var(--gold);
  background: rgba(233, 183, 93, 0.08);
}

/* 引力点入口 */

.page-home .home-hero__gravity {
  display: grid;
  gap: 0.85rem;
  margin: clamp(2.25rem, 5vw, 3.75rem) 0 0;
  padding: 0;
  list-style: none;
}

.page-home .gravity {
  display: block;
  padding: 1rem 1.05rem 1.1rem;
  border: 1px solid var(--line);
  background: linear-gradient(158deg, rgba(35, 38, 47, 0.92), rgba(6, 7, 13, 0.68));
  clip-path: polygon(var(--home-cut) 0, 100% 0, 100% calc(100% - var(--home-cut)), calc(100% - var(--home-cut)) 100%, 0 100%, 0 var(--home-cut));
  text-decoration: none;
  transition: transform 0.28s var(--ease), border-color 0.28s var(--ease), background 0.28s var(--ease);
}

.page-home .gravity:hover,
.page-home .gravity:focus-visible {
  transform: scale(1.045);
  border-color: var(--cyan);
  background: linear-gradient(158deg, rgba(43, 47, 58, 0.95), rgba(6, 7, 13, 0.72));
}

.page-home .gravity__num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--nebula);
}

.page-home .gravity__label {
  display: block;
  margin-top: 0.55rem;
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--cream);
}

.page-home .gravity__note {
  display: block;
  margin-top: 0.4rem;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: rgba(243, 238, 228, 0.62);
}

/* ---------- 正文骨架：左侧星轨索引 + 右侧章节流 ---------- */

.page-home .home-body {
  display: grid;
  gap: clamp(2rem, 4vw, 3rem);
  padding-block: clamp(3rem, 7vw, 5.5rem) clamp(4.5rem, 9vw, 7rem);
}

.page-home .home-rail__label {
  margin: 0 0 0.75rem;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--graphite);
  text-transform: uppercase;
}

.page-home .home-rail .rail__list {
  display: flex;
  gap: 0.3rem;
  margin: 0;
  padding: 0;
  list-style: none;
  overflow-x: auto;
}

.page-home .home-rail .rail__link {
  display: block;
  padding: 0.45rem 0.65rem;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: rgba(243, 238, 228, 0.58);
  text-decoration: none;
  border-left: 1px solid var(--line);
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-home .home-rail .rail__link:hover,
.page-home .home-rail .rail__link:focus-visible {
  color: var(--cream);
}

.page-home .home-rail .rail__link.is-active {
  color: var(--gold);
  border-left-color: var(--gold);
}

/* ---------- 章节 ---------- */

.page-home .home-sec {
  position: relative;
  padding-top: clamp(2.25rem, 5vw, 3.5rem);
}

.page-home .home-sec + .home-sec {
  margin-top: clamp(2.5rem, 6vw, 4.5rem);
}

.page-home .home-sec::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 58px;
  height: 3px;
  background: linear-gradient(90deg, var(--nebula), var(--cyan));
  transform: skewX(-36deg);
}

.page-home .home-sec::after {
  content: "";
  position: absolute;
  top: 0;
  left: 82px;
  right: 0;
  height: 1px;
  background: var(--line);
  transform: skewY(-0.55deg);
}

.page-home .home-sec__head {
  max-width: 44rem;
}

.page-home .home-sec__title {
  margin: 0.5rem 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(1.55rem, 3.4vw, 2.4rem);
  line-height: 1.28;
  letter-spacing: 0.025em;
  color: var(--cream);
}

.page-home .home-sec__text {
  margin: 0.9rem 0 0;
  max-width: 36rem;
  font-size: 1rem;
  line-height: 1.8;
  color: rgba(243, 238, 228, 0.72);
}

.page-home .sec-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.6rem;
}

.page-home .sec-foot {
  margin: 1.5rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgba(243, 238, 228, 0.66);
}

.page-home .sec-foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 201, 232, 0.4);
}

.page-home .sec-foot a:hover,
.page-home .sec-foot a:focus-visible {
  color: var(--cream);
  border-bottom-color: var(--cream);
}

/* ---------- 通用切角图片 ---------- */

.page-home .cut-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  clip-path: polygon(var(--home-cut) 0, 100% 0, 100% calc(100% - var(--home-cut)), calc(100% - var(--home-cut)) 100%, 0 100%, 0 var(--home-cut));
}

/* ---------- 01 会员 ---------- */

.page-home .member-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  margin-top: 1.85rem;
}

.page-home .steps {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-home .step {
  position: relative;
  padding: 1.1rem 1.25rem 1.2rem 4.4rem;
  border: 1px solid var(--line);
  background: linear-gradient(120deg, rgba(35, 38, 47, 0.86), rgba(6, 7, 13, 0.55));
  clip-path: polygon(var(--home-cut) 0, 100% 0, 100% calc(100% - var(--home-cut)), calc(100% - var(--home-cut)) 100%, 0 100%, 0 var(--home-cut));
}

.page-home .step__num {
  position: absolute;
  left: 1.25rem;
  top: 1.05rem;
  font-size: 1.5rem;
  letter-spacing: 0;
  color: var(--cyan);
}

.page-home .step__title {
  margin: 0;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--cream);
}

.page-home .step__text {
  margin: 0.5rem 0 0;
  font-size: 0.9375rem;
  line-height: 1.78;
  color: rgba(243, 238, 228, 0.68);
}

.page-home .member-figure {
  margin: 0;
}

.page-home .member-figure .media__caption {
  margin-top: 0.7rem;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: rgba(243, 238, 228, 0.5);
}

.page-home .entry-tabs {
  margin-top: 2.25rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.page-home .entry-tabs .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.1rem;
}

.page-home .entry-tabs .tabs__tab {
  appearance: none;
  padding: 0.5rem 1.05rem;
  border: 1px solid var(--line-strong);
  background: transparent;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 0.875rem;
  letter-spacing: 0.04em;
  cursor: pointer;
  clip-path: polygon(8px 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%, 0 8px);
  transition: color 0.2s var(--ease), background 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-home .entry-tabs .tabs__tab:hover,
.page-home .entry-tabs .tabs__tab:focus-visible {
  color: var(--cream);
  border-color: var(--cyan);
}

.page-home .entry-tabs .tabs__tab[aria-selected="true"] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-home .entry-tabs .tabs__panel {
  max-width: 36rem;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgba(243, 238, 228, 0.72);
}

.page-home .entry-tabs .tabs__panel + .tabs__panel {
  margin-top: 0.9rem;
  padding-top: 0.9rem;
  border-top: 1px dashed var(--line);
}

/* ---------- 02 版本轨道 ---------- */

.page-home .track-figure {
  margin: 1.85rem 0 0;
  border: 1px solid var(--line);
  background: var(--rock);
  padding: 0.65rem;
  clip-path: polygon(var(--home-cut) 0, 100% 0, 100% calc(100% - var(--home-cut)), calc(100% - var(--home-cut)) 100%, 0 100%, 0 var(--home-cut));
}

.page-home .track {
  position: relative;
  display: grid;
  gap: 1.35rem;
  margin: 2rem 0 0;
  padding: 0;
  list-style: none;
}

.page-home .track__node {
  position: relative;
  padding-top: 1.9rem;
}

.page-home .track__dot {
  position: absolute;
  top: 0;
  left: 0;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--cyan);
}

.page-home .track__node--now .track__dot {
  border-color: var(--gold);
  box-shadow: 0 0 0 6px rgba(233, 183, 93, 0.14);
}

.page-home .track__label {
  display: block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--graphite);
}

.page-home .track__node--now .track__label {
  color: var(--gold);
}

.page-home .track__name {
  display: block;
  margin-top: 0.4rem;
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--cream);
}

.page-home .track__text {
  margin: 0.45rem 0 0;
  max-width: 26rem;
  font-size: 0.9rem;
  line-height: 1.78;
  color: rgba(243, 238, 228, 0.66);
}

/* ---------- 03 旧版对照折叠面板 ---------- */

.page-home .guide-acc {
  margin-top: 1.85rem;
  border-top: 1px solid var(--line);
}

.page-home .guide-acc .accordion__item {
  border-bottom: 1px solid var(--line);
}

.page-home .guide-acc .accordion__trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: 1.05rem 0.25rem;
  border: 0;
  background: transparent;
  text-align: left;
  font-family: var(--font-body);
  font-size: 0.98rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--cream);
  cursor: pointer;
}

.page-home .guide-acc .accordion__trigger:hover,
.page-home .guide-acc .accordion__trigger:focus-visible {
  color: var(--cyan);
}

.page-home .guide-acc .accordion__icon {
  position: relative;
  flex: none;
  width: 12px;
  height: 12px;
}

.page-home .guide-acc .accordion__icon::before,
.page-home .guide-acc .accordion__icon::after {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 12px;
  height: 1.5px;
  background: var(--mist);
}

.page-home .guide-acc .accordion__icon::after {
  transform: rotate(90deg);
  transition: transform 0.22s var(--ease), opacity 0.22s var(--ease);
}

.page-home .guide-acc .accordion__trigger[aria-expanded="true"] .accordion__icon::after {
  transform: rotate(0deg);
  opacity: 0;
}

.page-home .guide-acc .accordion__panel {
  padding: 0 0.25rem 1.2rem;
}

.page-home .guide-acc .accordion__panel p {
  margin: 0;
  max-width: 38rem;
  font-size: 0.9375rem;
  line-height: 1.82;
  color: rgba(243, 238, 228, 0.7);
  border-left: 2px solid var(--clay);
  padding-left: 1rem;
}

/* ---------- 04 资料库 ---------- */

.page-home .library-grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  margin-top: 1.85rem;
}

.page-home .library-figure {
  margin: 0;
  border-left: 2px solid var(--moss);
  padding-left: 0.85rem;
}

.page-home .volumes {
  display: grid;
  gap: 0.85rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-home .volume {
  padding: 0.95rem 1.1rem 1rem;
  border: 1px solid var(--line);
  background: rgba(35, 38, 47, 0.6);
  border-left-width: 3px;
}

.page-home .volume--jade {
  border-left-color: var(--moss);
}

.page-home .volume--clay {
  border-left-color: var(--clay);
}

.page-home .volume--cyan {
  border-left-color: var(--cyan);
}

.page-home .volume__tag {
  display: block;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cream);
}

.page-home .volume--jade .volume__tag {
  color: var(--moss);
}

.page-home .volume--clay .volume__tag {
  color: var(--clay);
}

.page-home .volume--cyan .volume__tag {
  color: var(--cyan);
}

.page-home .volume__text {
  margin: 0.5rem 0 0;
  font-size: 0.9125rem;
  line-height: 1.78;
  color: rgba(243, 238, 228, 0.68);
}

.page-home .library-note {
  margin: 1.35rem 0 0;
  max-width: 38rem;
  font-size: 0.9375rem;
  line-height: 1.82;
  color: rgba(243, 238, 228, 0.7);
}

/* ---------- 05 更新节奏 ---------- */

.page-home .cadence {
  margin-top: 1.85rem;
  padding: clamp(1.25rem, 3vw, 2rem);
  border: 1px solid var(--line);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(107, 75, 214, 0.22), transparent 62%),
    rgba(35, 38, 47, 0.55);
  clip-path: polygon(var(--home-cut) 0, 100% 0, 100% calc(100% - var(--home-cut)), calc(100% - var(--home-cut)) 100%, 0 100%, 0 var(--home-cut));
}

.page-home .cadence__list {
  display: grid;
  gap: 1.15rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-home .cadence__item {
  display: grid;
  gap: 0.4rem;
}

.page-home .cadence__when {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-home .cadence__what {
  margin: 0;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: rgba(243, 238, 228, 0.72);
}

.page-home .cadence__note {
  margin: 1.5rem 0 0;
  max-width: 38rem;
  font-size: 0.9375rem;
  line-height: 1.82;
  color: rgba(243, 238, 228, 0.62);
}

.page-home .cadence .btn {
  margin-top: 1.35rem;
}

/* ---------- 06 联系通道 ---------- */

.page-home .support {
  margin-top: 1.85rem;
}

.page-home .support__list {
  display: grid;
  gap: 0.75rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-home .support__item {
  display: grid;
  gap: 0.3rem;
  padding: 0.9rem 1.05rem;
  border: 1px solid var(--line);
  background: rgba(35, 38, 47, 0.55);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}

.page-home .support__key {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-home .support__value {
  font-size: 0.9688rem;
  line-height: 1.6;
  color: var(--cream);
  word-break: break-word;
}

.page-home .support__note {
  margin: 1.35rem 0 0;
  max-width: 38rem;
  font-size: 0.9375rem;
  line-height: 1.82;
  color: rgba(243, 238, 228, 0.66);
}

/* ---------- 渐进披露 ---------- */

.page-home [data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.42s var(--ease), transform 0.42s var(--ease);
}

.page-home .js-ready [data-reveal].is-visible,
.page-home [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

/* 无脚本时保持可见 */
.page-home:not(.js-ready) [data-reveal] {
  opacity: 1;
  transform: none;
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-home .cadence__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.5rem;
  }

  .page-home .support__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-home .track {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.75rem;
  }

  .page-home .track::before {
    content: "";
    position: absolute;
    top: 6px;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, var(--nebula), var(--cyan), var(--gold));
    opacity: 0.5;
  }
}

@media (min-width: 860px) {
  .page-home .home-hero__gravity {
    grid-template-columns: 1.15fr 0.9fr 1.05fr 0.95fr;
    align-items: start;
    gap: 1rem;
  }

  .page-home .home-hero__gravity > li:nth-child(2) {
    transform: translateY(28px);
  }

  .page-home .home-hero__gravity > li:nth-child(3) {
    transform: translateY(-12px);
  }

  .page-home .home-hero__gravity > li:nth-child(4) {
    transform: translateY(42px);
  }
}

@media (min-width: 900px) {
  .page-home .member-grid {
    grid-template-columns: minmax(0, 1fr) 320px;
    align-items: start;
  }

  .page-home .library-grid {
    grid-template-columns: 300px minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1000px) {
  .page-home .home-body {
    grid-template-columns: 186px minmax(0, 1fr);
    column-gap: clamp(2rem, 5vw, 4rem);
    align-items: start;
  }

  .page-home .home-rail {
    position: sticky;
    top: 6.5rem;
    align-self: start;
  }

  .page-home .home-rail .rail__list {
    flex-direction: column;
    gap: 0.1rem;
    overflow: visible;
  }
}

@media (max-width: 999px) {
  .page-home .home-rail {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 40;
    padding: 0.45rem var(--gutter) calc(0.45rem + env(safe-area-inset-bottom, 0px));
    background: rgba(6, 7, 13, 0.94);
    border-top: 1px solid var(--line-strong);
    backdrop-filter: blur(12px);
  }

  .page-home .home-rail__label {
    display: none;
  }

  .page-home .home-rail .rail__list {
    gap: 0.2rem;
  }

  .page-home .home-rail .rail__link {
    padding: 0.5rem 0.55rem;
    font-size: 12px;
    border-left: 0;
    border-bottom: 2px solid transparent;
  }

  .page-home .home-rail .rail__link.is-active {
    border-left-color: transparent;
    border-bottom-color: var(--gold);
  }

  .page-home .home-body {
    padding-bottom: 6rem;
  }
}

@media (max-width: 560px) {
  .page-home .step {
    padding: 1rem 1rem 1.1rem 3.6rem;
  }

  .page-home .step__num {
    left: 1rem;
    font-size: 1.25rem;
  }

  .page-home .volume {
    padding: 0.85rem 0.9rem 0.9rem;
  }

  .page-home .track-figure {
    padding: 0.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-home .gravity,
  .page-home [data-reveal],
  .page-home .guide-acc .accordion__icon::after {
    transition: opacity 0.2s linear;
    transform: none !important;
  }

  .page-home [data-reveal] {
    opacity: 1;
    transform: none;
  }
}