.page-about {
  --about-block-pad: clamp(38px, 5.4vw, 76px);
  --about-gap: clamp(18px, 2.4vw, 34px);
  background:
    radial-gradient(115% 55% at 88% -4%, rgba(40, 224, 200, 0.08), transparent 60%),
    radial-gradient(80% 40% at 4% 32%, rgba(138, 123, 255, 0.05), transparent 68%),
    var(--ink);
  color: var(--cream);
  padding-bottom: clamp(46px, 6vw, 92px);
}

.page-about .breadcrumb {
  margin: clamp(16px, 2vw, 26px) 0 clamp(6px, 1vw, 14px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--about-gap);
  padding-block: clamp(14px, 2.2vw, 30px) clamp(34px, 4.6vw, 62px);
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-hero__title {
  font-size: clamp(1.85rem, 4.3vw, 3.3rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -0.012em;
  margin: 14px 0 0;
  max-width: 20ch;
}

.page-about .about-hero__lede {
  margin: 18px 0 0;
  font-size: clamp(1rem, 1.5vw, 1.18rem);
  line-height: 1.75;
  color: var(--cyan-soft);
  max-width: 46ch;
}

.page-about .about-hero__body {
  margin: 14px 0 0;
  font-size: var(--fs-base);
  line-height: 1.8;
  color: rgba(253, 251, 247, 0.78);
  max-width: 46ch;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--line-dark-soft);
}

.page-about .about-stats__item {
  background: var(--ink-2);
  padding: 14px 12px 15px;
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 2.6vw, 1.9rem);
  line-height: 1.05;
  color: var(--amber);
  letter-spacing: 0.02em;
}

.page-about .about-stats__label {
  display: block;
  margin-top: 7px;
  font-size: var(--fs-xs);
  letter-spacing: 0.05em;
  color: var(--slate);
}

.page-about .about-hero__figure {
  margin: 0;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink-2);
  box-shadow: var(--shadow-soft);
}

.page-about .about-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1280 / 860;
  object-fit: cover;
}

.page-about .about-hero__figure .media-caption {
  padding: 12px 16px 14px;
  border-top: 1px solid var(--line-dark);
  font-size: var(--fs-xs);
  color: var(--slate);
  line-height: 1.6;
}

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6.4fr);
    align-items: end;
    gap: clamp(30px, 4vw, 64px);
  }
}

/* ---------- 区块骨架 ---------- */
.page-about .about-block {
  padding-block: var(--about-block-pad);
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-block--last {
  border-bottom: none;
}

.page-about .about-block__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: clamp(10px, 1.4vw, 18px);
  margin-bottom: clamp(18px, 2.4vw, 30px);
}

.page-about .about-block__num {
  flex: none;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding: 4px 9px;
  border: 1px solid rgba(40, 224, 200, 0.34);
  border-radius: var(--radius);
  background: rgba(40, 224, 200, 0.06);
}

.page-about .about-block__title {
  margin: 0;
  font-size: clamp(1.3rem, 2.4vw, 2rem);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: -0.01em;
  max-width: 26ch;
}

.page-about .about-block__lede {
  margin: 0 0 clamp(20px, 2.6vw, 32px);
  font-size: var(--fs-base);
  line-height: 1.8;
  color: rgba(253, 251, 247, 0.74);
  max-width: 60ch;
}

.page-about .about-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(40, 224, 200, 0.42);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-about .about-link:hover {
  color: var(--cyan-soft);
  border-color: var(--cyan-soft);
}

/* ---------- 三件事 ---------- */
.page-about .about-pillars {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-dark);
}

.page-about .pillar {
  padding: clamp(20px, 2.4vw, 28px) 0;
  border-bottom: 1px solid var(--line-dark);
}

.page-about .pillar__key {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.16em;
  color: var(--ink);
  background: var(--cyan);
  border-radius: var(--radius);
  padding: 3px 9px;
}

.page-about .pillar__title {
  margin: 14px 0 0;
  font-size: clamp(1.08rem, 1.7vw, 1.35rem);
  font-weight: 900;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .pillar__text {
  margin: 10px 0 0;
  font-size: var(--fs-base);
  line-height: 1.8;
  color: rgba(253, 251, 247, 0.76);
  max-width: 62ch;
}

@media (min-width: 860px) {
  .page-about .about-pillars {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 1px;
    background: var(--line-dark);
  }

  .page-about .pillar {
    background: var(--ink);
    padding: clamp(22px, 2.4vw, 30px) clamp(18px, 2vw, 26px);
    border-bottom: none;
  }

  .page-about .pillar:first-child {
    padding-left: 0;
  }

  .page-about .pillar:last-child {
    padding-right: 0;
  }
}

/* ---------- 时间轴 ---------- */
.page-about .about-track-figure {
  margin: 0 0 clamp(24px, 3.2vw, 42px);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .about-track-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1400 / 700;
  object-fit: cover;
}

.page-about .about-timeline {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-about .tl-item {
  position: relative;
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: clamp(12px, 2vw, 26px);
  padding: 22px 0 24px;
  border-top: 1px solid var(--line-dark);
}

.page-about .tl-item:last-child {
  border-bottom: 1px solid var(--line-dark);
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, transparent, var(--line-dark) 14%, var(--line-dark) 86%, transparent);
}

.page-about .tl-item__num {
  position: relative;
  align-self: start;
  font-family: var(--font-mono);
  font-size: var(--fs-md);
  line-height: 1;
  color: var(--cyan);
  letter-spacing: 0.06em;
  padding: 4px 0 0;
  background: var(--ink);
  z-index: 1;
}

.page-about .tl-item__num::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 9px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(40, 224, 200, 0.14);
}

.page-about .tl-item__season {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-about .tl-item__title {
  margin: 9px 0 0;
  font-size: clamp(1.08rem, 1.7vw, 1.3rem);
  font-weight: 900;
  line-height: 1.38;
}

.page-about .tl-item__text {
  margin: 9px 0 0;
  font-size: var(--fs-base);
  line-height: 1.8;
  color: rgba(253, 251, 247, 0.74);
  max-width: 66ch;
}

@media (min-width: 760px) {
  .page-about .tl-item {
    grid-template-columns: clamp(76px, 8vw, 118px) minmax(0, 1fr);
  }

  .page-about .tl-item::before {
    left: clamp(34px, 3.6vw, 52px);
  }
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(min(100%, 208px), 1fr));
  gap: clamp(12px, 1.4vw, 16px);
}

.page-about .team-card {
  background: var(--paper);
  color: var(--ink-text);
  border: 1px solid rgba(20, 32, 46, 0.1);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.page-about .team-card > summary {
  list-style: none;
  cursor: pointer;
  padding: 16px 16px 14px;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
}

.page-about .team-card > summary::-webkit-details-marker {
  display: none;
}

.page-about .team-card__num {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  color: var(--cyan);
  background: var(--ink);
  border-radius: var(--radius);
  padding: 3px 7px;
  line-height: 1.3;
}

.page-about .team-card__role {
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: 0.01em;
  color: var(--ink-text);
}

.page-about .team-card__flag {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  line-height: 1;
  color: rgba(20, 32, 46, 0.45);
  transition: transform 0.22s var(--ease), color 0.22s var(--ease);
}

.page-about .team-card[open] .team-card__flag {
  color: var(--ink-text);
  transform: rotate(90deg);
}

.page-about .team-card__desc {
  margin: 0;
  padding: 0 16px 12px;
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: rgba(20, 32, 46, 0.74);
  border-top: 1px solid var(--paper-2);
  padding-top: 12px;
}

.page-about .team-card__list {
  margin: 0;
  padding: 0 16px 18px 16px;
  list-style: none;
}

.page-about .team-card__list li {
  position: relative;
  padding-left: 16px;
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: rgba(20, 32, 46, 0.8);
}

.page-about .team-card__list li + li {
  margin-top: 7px;
}

.page-about .team-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
}

/* ---------- 路径与类别 ---------- */
.page-about .about-paths {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(10px, 1.2vw, 14px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .path-card {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-rows: auto auto;
  gap: 4px 14px;
  text-decoration: none;
  padding: 18px 18px 20px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg);
  background: linear-gradient(150deg, rgba(40, 224, 200, 0.07), rgba(19, 41, 63, 0.6) 58%);
  color: var(--cream);
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .path-card__num {
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: var(--fs-md);
  line-height: 1.2;
  color: var(--cyan);
  letter-spacing: 0.04em;
}

.page-about .path-card__name {
  font-size: 1.05rem;
  font-weight: 900;
  line-height: 1.4;
}

.page-about .path-card__desc {
  font-size: var(--fs-sm);
  line-height: 1.72;
  color: rgba(253, 251, 247, 0.72);
}

.page-about .about-cats-wrap {
  margin-top: clamp(24px, 3vw, 40px);
  padding-top: clamp(18px, 2.2vw, 26px);
  border-top: 1px solid var(--line-dark);
}

.page-about .about-cats__label {
  margin: 0 0 14px;
  font-size: var(--fs-xs);
  letter-spacing: 0.12em;
  font-family: var(--font-mono);
  color: var(--slate);
}

.page-about .about-cats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .cat-chip {
  font-size: var(--fs-sm);
  letter-spacing: 0.02em;
  padding: 6px 13px;
  border-radius: 999px;
  border: 1px solid var(--line-dark);
  background: rgba(19, 41, 63, 0.72);
  color: rgba(253, 251, 247, 0.86);
}

.page-about .cat-chip:nth-child(3n + 1) {
  border-color: rgba(40, 224, 200, 0.34);
}

.page-about .cat-chip:nth-child(3n + 2) {
  border-color: rgba(242, 180, 65, 0.32);
}

.page-about .cat-chip:nth-child(3n + 3) {
  border-color: rgba(138, 123, 255, 0.34);
}

@media (min-width: 820px) {
  .page-about .about-paths {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (hover: hover) {
  .page-about .path-card:hover {
    border-color: rgba(40, 224, 200, 0.5);
    background: linear-gradient(150deg, rgba(40, 224, 200, 0.13), rgba(19, 41, 63, 0.72) 58%);
    transform: translateY(-2px);
  }
}

/* ---------- 流程 ---------- */
.page-about .about-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}

.page-about .flow-step {
  position: relative;
  padding: 16px 16px 20px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg);
  background: linear-gradient(165deg, rgba(40, 224, 200, 0.07), rgba(11, 29, 51, 0.2) 62%);
  transition: border-color 0.22s var(--ease), background 0.22s var(--ease);
}

.page-about .flow-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  color: var(--amber);
}

.page-about .flow-step__name {
  display: block;
  margin-top: 8px;
  font-size: 1.02rem;
  font-weight: 900;
  letter-spacing: 0.01em;
}

.page-about .flow-step__out {
  margin: 8px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.7;
  color: rgba(253, 251, 247, 0.68);
}

.page-about .about-flow-figure {
  margin: clamp(24px, 3vw, 40px) 0 0;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .about-flow-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1000 / 700;
  object-fit: cover;
}

.page-about .about-flow-figure .media-caption {
  padding: 12px 16px 14px;
  border-top: 1px solid var(--line-dark);
  font-size: var(--fs-xs);
  color: var(--slate);
  line-height: 1.6;
}

@media (min-width: 560px) {
  .page-about .about-flow {
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 190px), 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-flow {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .flow-step::after {
    content: "→";
    position: absolute;
    right: -18px;
    top: 50%;
    transform: translateY(-50%);
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: rgba(140, 244, 231, 0.4);
    pointer-events: none;
  }

  .page-about .flow-step:last-child::after {
    content: none;
  }

  .page-about .about-flow-figure {
    max-width: 860px;
    margin-left: auto;
  }
}

@media (hover: hover) {
  .page-about .flow-step:hover {
    border-color: rgba(40, 224, 200, 0.48);
    background: linear-gradient(165deg, rgba(40, 224, 200, 0.13), rgba(11, 29, 51, 0.3) 62%);
  }

  .page-about .flow-step:hover .flow-step__out {
    color: rgba(253, 251, 247, 0.86);
  }
}

/* ---------- 重庆与联系 ---------- */
.page-about .about-local {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 44px);
}

.page-about .about-local__text p {
  margin: 0 0 16px;
  font-size: var(--fs-base);
  line-height: 1.82;
  color: rgba(253, 251, 247, 0.78);
  max-width: 56ch;
}

.page-about .about-local__panel {
  padding: 20px 20px 22px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius-lg);
  background: var(--ink-2);
  box-shadow: var(--shadow-soft);
}

.page-about .about-local__label {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  color: var(--cyan);
}

.page-about .about-local__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 3px;
  margin: 0 0 13px;
  padding-bottom: 13px;
  border-bottom: 1px solid var(--line-dark-soft);
}

.page-about .about-local__row:last-of-type {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .about-local__key {
  font-size: var(--fs-xs);
  letter-spacing: 0.1em;
  color: var(--slate);
}

.page-about .about-local__val {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  line-height: 1.6;
  color: var(--cream);
  word-break: break-word;
}

.page-about .about-local__note {
  margin: 16px 0 0;
  font-size: var(--fs-sm);
  line-height: 1.72;
  color: rgba(253, 251, 247, 0.66);
}

.page-about .about-local__icp {
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-dark-soft);
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.06em;
  color: var(--slate);
}

@media (min-width: 900px) {
  .page-about .about-local {
    grid-template-columns: minmax(0, 6fr) minmax(0, 4.4fr);
    align-items: start;
  }
}

/* ---------- 尾部路径 ---------- */
.page-about .about-returns {
  margin-top: clamp(30px, 4vw, 56px);
  padding-top: clamp(22px, 3vw, 38px);
  border-top: 1px solid var(--line-dark);
}

.page-about .about-returns__title {
  margin: 0 0 clamp(16px, 2vw, 24px);
  font-size: clamp(1.1rem, 1.9vw, 1.45rem);
  font-weight: 900;
  line-height: 1.34;
  letter-spacing: -0.008em;
  max-width: 30ch;
}

.page-about .about-returns__list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .return-link {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 14px;
  padding: 15px 16px;
  text-decoration: none;
  color: var(--cream);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: rgba(19, 41, 63, 0.56);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .return-link__num {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .return-link__name {
  font-size: 1rem;
  font-weight: 900;
  letter-spacing: 0.01em;
}

.page-about .return-link__arrow {
  font-family: var(--font-mono);
  font-size: var(--fs-md);
  line-height: 1;
  color: rgba(140, 244, 231, 0.5);
  transition: transform 0.2s var(--ease), color 0.2s var(--ease);
}

@media (min-width: 720px) {
  .page-about .about-returns__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1120px) {
  .page-about .about-returns__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .return-link {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-rows: auto auto;
    gap: 8px 12px;
    padding: 18px 18px 20px;
  }

  .page-about .return-link__num {
    grid-column: 1;
    grid-row: 1;
  }

  .page-about .return-link__name {
    grid-column: 1 / -1;
    grid-row: 2;
  }

  .page-about .return-link__arrow {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
  }
}

@media (hover: hover) {
  .page-about .return-link:hover {
    border-color: rgba(40, 224, 200, 0.46);
    background: rgba(40, 224, 200, 0.1);
  }

  .page-about .return-link:hover .return-link__arrow {
    color: var(--cyan);
    transform: translateX(3px);
  }
}

/* ---------- 动效 ---------- */
.page-about .reveal {
  opacity: 0;
  transform: translateY(12px);
}

.page-about .reveal.is-visible {
  opacity: 1;
  transform: none;
  transition: opacity 0.55s var(--ease), transform 0.55s var(--ease);
}

@media (prefers-reduced-motion: reduce) {
  .page-about .reveal,
  .page-about .reveal.is-visible {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .page-about .path-card,
  .page-about .return-link,
  .page-about .return-link__arrow,
  .page-about .team-card__flag {
    transition: none;
  }
}
</main>