/* ============ 品牌故事 /story/ ============ */
.page-about {
  --about-line: rgba(139, 92, 255, 0.24);
  --about-panel: rgba(43, 30, 92, 0.5);
  background: var(--c-night);
  color: var(--c-text);
  overflow-x: clip;
}

/* ---- 右侧章节轨道 ---- */
.page-about .read-rail {
  display: none;
}

@media (min-width: 1180px) {
  .page-about .read-rail {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
    position: fixed;
    right: 1.15rem;
    top: 50%;
    transform: translateY(-50%);
    z-index: 30;
  }
  .page-about .read-rail__link {
    display: block;
    padding: 0.15rem 0.6rem;
    font-family: var(--font-label);
    font-size: 11px;
    letter-spacing: 0.06em;
    text-align: right;
    text-decoration: none;
    color: var(--c-muted);
    border-right: 1px solid var(--about-line);
    transition: color 0.22s ease, border-color 0.22s ease;
  }
  .page-about .read-rail__link:hover,
  .page-about .read-rail__link.is-active {
    color: var(--c-cyan);
    border-right-color: var(--c-cyan);
  }
}

/* ---- 首屏 ---- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + 3rem) 0 var(--space-4);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -12%;
  right: -14%;
  width: min(780px, 92vw);
  height: min(780px, 92vw);
  background: radial-gradient(circle at 58% 42%, rgba(139, 92, 255, 0.34), rgba(255, 61, 139, 0.13) 46%, transparent 72%);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--about-line) 30%, var(--about-line) 70%, transparent);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-4);
}

.page-about .about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 6.2vw, 4.2rem);
  line-height: 1.02;
  letter-spacing: -0.02em;
  margin: 0.28em 0 0.42em;
}

.page-about .about-hero .lede {
  font-size: clamp(1rem, 1.5vw, 1.125rem);
  line-height: 1.8;
  max-width: 44ch;
  color: var(--c-text);
}

.page-about .about-hero__facts {
  list-style: none;
  margin: var(--space-3) 0 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-about .about-hero__facts li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem;
  font-size: var(--step-16);
  line-height: 1.65;
}

.page-about .about-hero__figure {
  margin: 0;
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-line);
  box-shadow: var(--shadow-card);
}

.page-about .about-hero__figure figcaption {
  margin-top: 0.75rem;
  font-size: var(--step-13);
  line-height: 1.65;
  color: var(--c-muted);
}

@media (min-width: 940px) {
  .page-about .about-hero {
    padding: calc(var(--header-h) + 4.5rem) 0 var(--space-5);
  }
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
    gap: var(--space-5);
  }
  .page-about .about-hero__figure {
    margin-right: -6vw;
  }
}

/* ---- 章节骨架 ---- */
.page-about .about-chapters {
  display: grid;
  gap: var(--space-6);
  padding: var(--space-5) 0 var(--space-6);
}

.page-about .about-chapter {
  display: grid;
  gap: var(--space-2);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .about-chapter__rail {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.page-about .about-chapter__line {
  display: none;
}

.page-about .about-chapter__no {
  font-family: var(--font-label);
  font-size: var(--step-24);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.04em;
  color: var(--c-violet);
}

.page-about .about-chapter__tag {
  font-family: var(--font-label);
  font-size: var(--step-12);
  letter-spacing: 0.1em;
  color: var(--c-muted);
}

.page-about .about-chapter__body > h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.5rem, 3.4vw, 2.4rem);
  line-height: 1.14;
  letter-spacing: -0.015em;
  margin: 0 0 var(--space-2);
}

.page-about .about-chapter__body > p {
  max-width: 66ch;
  line-height: 1.8;
  margin: 0 0 1.05em;
}

.page-about .about-chapter__body > p:last-child {
  margin-bottom: 0;
}

.page-about .about-note {
  font-size: var(--step-13);
  line-height: 1.75;
  color: var(--c-muted);
  border-left: 2px solid var(--c-gold);
  padding-left: 0.9rem;
  max-width: 60ch;
}

@media (min-width: 860px) {
  .page-about .about-chapter {
    grid-template-columns: 132px minmax(0, 1fr);
    column-gap: var(--space-4);
  }
  .page-about .about-chapter__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.7rem;
    padding-top: 0.4rem;
  }
  .page-about .about-chapter__line {
    display: block;
    width: 1px;
    flex: 1 0 auto;
    min-height: 90px;
    background: linear-gradient(180deg, var(--c-violet), rgba(139, 92, 255, 0));
  }
  .page-about .about-chapter__tag {
    writing-mode: horizontal-tb;
  }
}

/* ---- 空间卡片 ---- */
.page-about .about-space-grid {
  display: grid;
  gap: var(--space-2);
  margin: var(--space-3) 0;
}

.page-about .space-card {
  padding: var(--space-3);
  border-radius: var(--radius);
  border: 1px solid var(--glass-line);
  background: var(--about-panel);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about .space-card:hover {
  border-color: rgba(51, 240, 210, 0.4);
  transform: translateY(-2px);
}

.page-about .space-card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.6rem;
  margin-bottom: 0.8rem;
}

.page-about .space-card__title {
  margin: 0;
  font-size: var(--step-18);
  font-weight: 700;
  letter-spacing: 0.01em;
}

.page-about .space-card p {
  margin: 0;
  font-size: var(--step-16);
  line-height: 1.78;
  color: var(--c-text);
  max-width: none;
}

@media (min-width: 700px) {
  .page-about .about-space-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---- 楼层平面示意 ---- */
.page-about .about-floor {
  margin: var(--space-3) 0;
  padding: var(--space-3);
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-line);
  background: linear-gradient(160deg, rgba(43, 30, 92, 0.7), rgba(26, 17, 64, 0.9));
}

.page-about .about-floor svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .floor__zone {
  outline: none;
  cursor: default;
}

.page-about .floor__zone rect {
  fill: rgba(139, 92, 255, 0.16);
  stroke: rgba(139, 92, 255, 0.45);
  stroke-width: 1.5;
  transition: fill 0.25s ease, stroke 0.25s ease;
}

.page-about .floor__zone:focus rect {
  outline: none;
}

.page-about .floor__zone:hover rect,
.page-about .floor__zone:focus-visible rect {
  fill: rgba(51, 240, 210, 0.2);
  stroke: var(--c-cyan);
}

.page-about .floor__name {
  fill: #EDE9FB;
  font-family: var(--font-label);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.page-about .floor__cap {
  fill: #FFC46B;
  font-family: var(--font-label);
  font-size: 11px;
  letter-spacing: 0.04em;
  opacity: 0;
  transition: opacity 0.25s ease;
}

.page-about .floor__zone:hover .floor__cap,
.page-about .floor__zone:focus-visible .floor__cap {
  opacity: 1;
}

.page-about .about-floor__note {
  margin: var(--space-2) 0 0;
  font-size: var(--step-13);
  line-height: 1.7;
  color: var(--c-muted);
}

/* ---- 舞台照片 ---- */
.page-about .about-space-photo {
  margin: var(--space-3) 0 0;
}

.page-about .about-space-photo img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-line);
}

.page-about .about-space-photo figcaption {
  margin-top: 0.7rem;
  font-size: var(--step-13);
  line-height: 1.7;
  color: var(--c-muted);
}

/* ---- 排期流程 ---- */
.page-about .about-flow {
  list-style: none;
  margin: var(--space-3) 0 0;
  padding: 0;
  display: grid;
  gap: var(--space-2);
}

.page-about .about-flow li {
  position: relative;
  padding: var(--space-3) var(--space-3) var(--space-3) calc(var(--space-3) + 42px);
  border-radius: var(--radius);
  border: 1px solid var(--hairline);
  background: rgba(43, 30, 92, 0.45);
}

.page-about .about-flow__no {
  position: absolute;
  left: var(--space-3);
  top: var(--space-3);
  font-family: var(--font-label);
  font-size: var(--step-24);
  font-weight: 700;
  line-height: 1;
  color: var(--c-cyan);
}

.page-about .about-flow h3 {
  margin: 0 0 0.5rem;
  font-size: var(--step-18);
  font-weight: 700;
}

.page-about .about-flow p {
  margin: 0;
  font-size: var(--step-16);
  line-height: 1.78;
  color: var(--c-text);
  max-width: none;
}

@media (min-width: 780px) {
  .page-about .about-flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-3);
  }
}

/* ---- 团队 ---- */
.page-about .about-team {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.page-about .about-team__figure {
  margin: 0;
}

.page-about .about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--glass-line);
}

.page-about .about-team__figure figcaption {
  margin-top: 0.7rem;
  font-size: var(--step-13);
  line-height: 1.7;
  color: var(--c-muted);
}

.page-about .about-team__copy p {
  margin: 0 0 1.05em;
  line-height: 1.8;
  max-width: 66ch;
}

.page-about .about-team__copy p:last-child {
  margin-bottom: 0;
}

@media (min-width: 880px) {
  .page-about .about-team {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    align-items: start;
    gap: var(--space-4);
  }
}

/* ---- 合作生态 ---- */
.page-about .about-collab {
  display: grid;
  gap: var(--space-2);
  margin: var(--space-3) 0;
}

.page-about .about-collab__group {
  padding: var(--space-3);
  border-radius: var(--radius);
  border: 1px solid var(--glass-line);
  background: rgba(14, 8, 36, 0.62);
}

.page-about .about-collab__group h3 {
  margin: 0 0 0.9rem;
  font-size: var(--step-16);
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--c-gold);
}

.page-about .about-collab__group .tag-row {
  margin-bottom: 1rem;
}

.page-about .about-collab__group p {
  margin: 0;
  font-size: var(--step-16);
  line-height: 1.78;
  color: var(--c-text);
  max-width: none;
}

@media (min-width: 780px) {
  .page-about .about-collab {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---- 覆盖范围 ---- */
.page-about .about-reach {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-3);
}

.page-about .about-reach__num {
  display: block;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.6rem, 8vw, 4.2rem);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-cyan);
}

.page-about .about-reach__cap {
  display: block;
  margin-top: 0.6rem;
  font-size: var(--step-13);
  line-height: 1.7;
  color: var(--c-muted);
}

.page-about .about-reach__list p {
  margin: 0 0 1em;
  line-height: 1.8;
  max-width: 62ch;
}

.page-about .about-reach__list .tag-row {
  margin-bottom: 1em;
}

.page-about .about-reach__list .about-note {
  margin-bottom: 0;
}

@media (min-width: 780px) {
  .page-about .about-reach {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: center;
    gap: var(--space-4);
  }
  .page-about .about-reach__stat {
    padding-right: var(--space-3);
    border-right: 1px solid var(--about-line);
  }
}

/* ---- 发展节点 ---- */
.page-about .about-nodes {
  display: grid;
  gap: 0.75rem;
  margin-top: var(--space-3);
}

.page-about .about-node {
  padding: 0 var(--space-3);
  border-radius: var(--radius);
  border: 1px solid var(--glass-line);
  background: rgba(43, 30, 92, 0.42);
  transition: border-color 0.25s ease, background 0.25s ease;
}

.page-about .about-node[open] {
  border-color: rgba(51, 240, 210, 0.45);
  background: rgba(43, 30, 92, 0.7);
}

.page-about .about-node__sum {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  padding: var(--space-2) 0;
  cursor: pointer;
  list-style: none;
  font-size: var(--step-16);
  font-weight: 700;
  line-height: 1.5;
}

.page-about .about-node__sum::-webkit-details-marker {
  display: none;
}

.page-about .about-node__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-label);
  font-size: var(--step-18);
  color: var(--c-cyan);
}

.page-about .about-node[open] .about-node__sum::after {
  content: "–";
}

.page-about .about-node__stage {
  font-family: var(--font-label);
  font-size: var(--step-12);
  letter-spacing: 0.1em;
  color: var(--c-violet);
  white-space: nowrap;
}

.page-about .about-node__body {
  padding: 0 0 var(--space-3);
  font-size: var(--step-16);
  line-height: 1.8;
  color: var(--c-text);
}

/* ---- 下一步入口 ---- */
.page-about .about-next {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--about-line);
}

.page-about .about-next h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 3vw, 1.95rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 0 0 var(--space-3);
}

.page-about .about-next__grid {
  display: grid;
  gap: var(--space-2);
}

.page-about .about-next__link {
  display: grid;
  gap: 0.6rem;
  padding: var(--space-3);
  border-radius: var(--radius);
  border: 1px solid var(--glass-line);
  background: rgba(43, 30, 92, 0.4);
  text-decoration: none;
  color: inherit;
  transition: border-color 0.25s ease, background 0.25s ease, transform 0.25s ease;
}

.page-about .about-next__link:hover,
.page-about .about-next__link:focus-visible {
  border-color: rgba(51, 240, 210, 0.5);
  background: rgba(43, 30, 92, 0.72);
  transform: translateY(-2px);
}

.page-about .about-next__link .label {
  justify-self: start;
}

.page-about .about-next__title {
  font-size: var(--step-18);
  font-weight: 700;
  line-height: 1.4;
}

.page-about .about-next__desc {
  font-size: var(--step-13);
  line-height: 1.72;
  color: var(--c-muted);
}

@media (min-width: 700px) {
  .page-about .about-next__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .about-next__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .space-card,
  .page-about .about-next__link {
    transition: none;
  }
  .page-about .space-card:hover,
  .page-about .about-next__link:hover {
    transform: none;
  }
}