.page-about {
  --about-card: rgba(11, 59, 74, 0.66);
  --about-hair: rgba(201, 244, 242, 0.18);
  --about-soft: rgba(11, 59, 74, 0.38);
  background: var(--abyss-navy);
  color: var(--text-on-dark);
  font-family: var(--font-display);
  overflow-x: clip;
}

.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

.page-about .panel-label {
  margin: 0;
}

.page-about .about-crumb {
  padding-top: clamp(14px, 2.4vw, 24px);
  padding-bottom: clamp(4px, 1.2vw, 10px);
}

.page-about a:focus-visible,
.page-about button:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(8px, 1.6vw, 18px) 0 clamp(34px, 5vw, 66px);
  background:
    radial-gradient(115% 85% at 90% 0%, rgba(90, 31, 53, 0.55) 0%, rgba(6, 26, 43, 0) 58%),
    radial-gradient(85% 70% at 0% 100%, rgba(27, 27, 75, 0.8) 0%, rgba(6, 26, 43, 0) 62%);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  align-items: end;
}

.page-about .about-hero h1 {
  margin: clamp(10px, 1.6vw, 16px) 0 clamp(14px, 2.2vw, 20px);
  font-family: var(--font-display);
  font-size: clamp(30px, 6.4vw, 54px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--scoreboard-ivory);
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin: 0 0 clamp(20px, 3vw, 30px);
  font-size: clamp(15px, 1.8vw, 17px);
  line-height: 1.85;
  color: var(--mist-cyan);
  max-width: 44em;
}

.page-about .about-hero__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 12px;
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 10px;
  border-top: 2px solid var(--neon-cyan);
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(21px, 3vw, 28px);
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--electric-aqua);
}

.page-about .about-stat__label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist-cyan);
}

.page-about .media {
  position: relative;
  display: block;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius-panel);
  background: var(--deep-teal);
}

.page-about .media--4x3 { aspect-ratio: 4 / 3; }
.page-about .media--16x9 { aspect-ratio: 16 / 9; }
.page-about .media--1x1 { aspect-ratio: 1 / 1; }

.page-about .media__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.page-about .media__overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(180deg, rgba(6, 26, 43, 0) 42%, rgba(6, 26, 43, 0.82) 100%);
}

.page-about .media__caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 2;
  margin: 0;
  padding: 14px 16px;
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--scoreboard-ivory);
}

.page-about .about-hero__media {
  box-shadow: var(--shadow-panel);
}

/* ---------- 通用区块标题 ---------- */
.page-about .about-head {
  max-width: 760px;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-about .about-head h2 {
  margin: 10px 0 0;
  font-size: clamp(24px, 3.6vw, 38px);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: var(--scoreboard-ivory);
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline {
  position: relative;
  padding: clamp(56px, 8vw, 100px) 0 clamp(52px, 7vw, 92px);
  background: linear-gradient(158deg, var(--deep-teal) 0%, var(--abyss-navy) 82%);
  clip-path: polygon(0 0, 100% 2.2vw, 100% 100%, 0 calc(100% - 1.8vw));
}

.page-about .about-years {
  margin: 0 0 clamp(20px, 3vw, 30px);
}

.page-about .about-years__list {
  list-style: none;
  margin: 0;
  padding: 2px 2px 12px;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-years__item {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

.page-about .about-years__link {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-height: 44px;
  padding: 9px 16px;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-sm);
  background: rgba(11, 59, 74, 0.55);
  text-decoration: none;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-years__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--electric-aqua);
}

.page-about .about-years__text {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--mist-cyan);
  white-space: nowrap;
}

.page-about .about-years__link:hover {
  border-color: var(--neon-cyan);
  background: rgba(11, 59, 74, 0.9);
  transform: translateY(-3px);
}

.page-about .about-timeline__list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 16px;
  bottom: 16px;
  width: 2px;
  border-radius: 2px;
  transform: skewX(-7deg);
  transform-origin: 50% 0;
  background: linear-gradient(180deg, var(--neon-cyan) 0%, rgba(57, 230, 242, 0.4) 48%, rgba(57, 230, 242, 0.05) 100%);
}

.page-about .about-timeline__item {
  position: relative;
  padding-left: 30px;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  scroll-margin-top: 96px;
}

.page-about .about-timeline__item::after {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--abyss-navy);
  border: 2px solid var(--neon-cyan);
  transition: background 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.page-about .about-timeline__item:hover::after {
  background: var(--neon-cyan);
  box-shadow: 0 0 0 6px rgba(57, 230, 242, 0.14);
}

.page-about .about-timeline__year {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}

.page-about .about-timeline__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(24px, 3.4vw, 32px);
  line-height: 1.1;
  letter-spacing: 0.02em;
  color: var(--neon-cyan);
}

.page-about .about-timeline__tag {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--mist-cyan);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-pill);
  padding: 3px 10px;
  white-space: nowrap;
}

.page-about .about-timeline__body {
  background: var(--about-card);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-panel);
  padding: clamp(15px, 2.4vw, 24px);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.page-about .about-timeline__item:hover .about-timeline__body {
  transform: translateY(-4px);
  border-color: var(--neon-cyan);
  box-shadow: var(--shadow-lift);
}

.page-about .about-timeline__body h3 {
  margin: 0 0 8px;
  font-size: clamp(16px, 1.9vw, 19px);
  font-weight: 700;
  line-height: 1.45;
  color: var(--scoreboard-ivory);
}

.page-about .about-timeline__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist-cyan);
}

.page-about .about-timeline__figure {
  padding-left: 30px;
}

/* ---------- 内容运营 ---------- */
.page-about .about-ops {
  padding: clamp(44px, 6.5vw, 84px) 0;
  background: var(--abyss-navy);
}

.page-about .about-ops__head {
  display: grid;
  gap: clamp(14px, 2vw, 22px);
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-about .about-ops__head h2 {
  margin: 10px 0 0;
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: var(--scoreboard-ivory);
}

.page-about .about-ops__lede {
  margin: 0;
  padding-left: 16px;
  border-left: 2px solid var(--neon-cyan);
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist-cyan);
}

.page-about .about-ops__grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-ops__card {
  display: flex;
  flex-direction: column;
  padding: clamp(14px, 2vw, 20px);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-panel);
  background: linear-gradient(165deg, var(--deep-teal) 0%, rgba(6, 26, 43, 0.92) 100%);
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease);
}

.page-about .about-ops__card:hover {
  transform: translateY(-4px);
  border-color: var(--neon-cyan);
}

.page-about .about-ops__figure {
  margin: 0 0 6px;
  display: flex;
  align-items: baseline;
  gap: 4px;
}

.page-about .about-ops__num {
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(28px, 4.4vw, 42px);
  line-height: 1.05;
  color: var(--electric-aqua);
}

.page-about .about-ops__unit {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--mist-cyan);
}

.page-about .about-ops__title {
  margin: 0 0 8px;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--scoreboard-ivory);
}

.page-about .about-ops__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--mist-cyan);
}

/* ---------- 会员服务 ---------- */
.page-about .about-member {
  background: var(--scoreboard-ivory);
  color: var(--text-on-light);
  padding: clamp(46px, 6.5vw, 88px) 0;
}

.page-about .about-member .panel-label {
  color: var(--deep-teal);
}

.page-about .about-member__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: start;
}

.page-about .about-member h2 {
  margin: 10px 0 clamp(14px, 2vw, 20px);
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: var(--ink-navy);
}

.page-about .about-member__copy p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-navy);
}

.page-about .about-member__chips {
  list-style: none;
  margin: 4px 0 clamp(20px, 3vw, 26px);
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .about-member__chips li {
  font-size: 13px;
  padding: 6px 13px;
  border-radius: var(--radius-pill);
  background: rgba(11, 59, 74, 0.08);
  border: 1px solid rgba(11, 59, 74, 0.28);
  color: var(--deep-teal);
}

.page-about .about-member__cta {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  text-decoration: none;
}

.page-about .about-member a:focus-visible {
  outline-color: var(--deep-teal);
}

.page-about .about-member__aside {
  padding: clamp(18px, 2.6vw, 28px);
  border: 1px solid rgba(57, 230, 242, 0.28);
  border-radius: var(--radius-panel);
  background: linear-gradient(160deg, var(--midnight-indigo) 0%, var(--abyss-navy) 100%);
  color: var(--scoreboard-ivory);
  box-shadow: var(--shadow-panel);
}

.page-about .about-member__aside-label {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--neon-cyan);
}

.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-steps li {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist-cyan);
}

.page-about .about-steps__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 28px;
  border: 1px solid rgba(57, 230, 242, 0.4);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--electric-aqua);
}

/* ---------- 协作与专题 ---------- */
.page-about .about-eco {
  padding: clamp(56px, 8vw, 100px) 0 clamp(52px, 7vw, 92px);
  background: linear-gradient(150deg, var(--midnight-indigo) 0%, var(--wine-red) 54%, var(--abyss-navy) 100%);
  clip-path: polygon(0 2vw, 100% 0, 100% calc(100% - 1.6vw), 0 100%);
}

.page-about .about-eco__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  align-items: center;
}

.page-about .about-eco h2 {
  margin: 10px 0 clamp(12px, 2vw, 18px);
  font-size: clamp(24px, 3.4vw, 36px);
  font-weight: 900;
  line-height: 1.22;
  letter-spacing: -0.015em;
  color: var(--scoreboard-ivory);
}

.page-about .about-eco__copy > p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mist-cyan);
}

.page-about .about-eco__list {
  list-style: none;
  margin: clamp(14px, 2.4vw, 22px) 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-eco__item {
  padding: 10px 14px;
  border-left: 2px solid rgba(57, 230, 242, 0.55);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(6, 26, 43, 0.36);
  transition: background 0.22s var(--ease), border-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.page-about .about-eco__item:hover {
  background: rgba(6, 26, 43, 0.62);
  border-left-color: var(--coral-orange);
  transform: translateX(4px);
}

.page-about .about-eco__name {
  display: block;
  font-size: 15px;
  font-weight: 700;
  color: var(--scoreboard-ivory);
}

.page-about .about-eco__desc {
  display: block;
  margin-top: 2px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist-cyan);
}

.page-about .about-eco__note {
  margin: 0 0 clamp(18px, 2.6vw, 24px);
  padding-top: 14px;
  border-top: 1px solid rgba(201, 244, 242, 0.22);
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist-cyan);
}

.page-about .about-eco__cta {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  text-decoration: none;
}

.page-about .about-eco__media {
  box-shadow: var(--shadow-lift);
}

/* ---------- 覆盖与团队 ---------- */
.page-about .about-reach {
  padding: clamp(44px, 6.5vw, 84px) 0;
  background: var(--abyss-navy);
}

.page-about .about-reach__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .about-reach__card {
  padding: clamp(16px, 2.4vw, 24px);
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-panel);
  background: var(--about-soft);
}

.page-about .about-reach__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(30px, 4.6vw, 44px);
  line-height: 1.08;
  color: var(--electric-aqua);
}

.page-about .about-reach__label {
  display: block;
  margin: 4px 0 10px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--neon-cyan);
}

.page-about .about-reach__label--plain {
  margin-top: 0;
}

.page-about .about-reach__card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.82;
  color: var(--mist-cyan);
}

/* ---------- 下一步入口 ---------- */
.page-about .about-next {
  padding: clamp(36px, 5.5vw, 68px) 0 clamp(56px, 8vw, 96px);
  background: linear-gradient(180deg, rgba(11, 59, 74, 0.5) 0%, rgba(6, 26, 43, 0) 70%);
}

.page-about .about-next h2 {
  margin: 0;
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 900;
  line-height: 1.24;
  letter-spacing: -0.015em;
  color: var(--scoreboard-ivory);
}

.page-about .about-next__list {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-next__link {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-rows: auto auto;
  align-items: center;
  gap: 4px 16px;
  min-height: 44px;
  padding: 15px 16px;
  border: 1px solid var(--about-hair);
  border-radius: var(--radius-panel);
  background: rgba(11, 59, 74, 0.34);
  text-decoration: none;
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-next__link:hover {
  border-color: var(--neon-cyan);
  background: rgba(11, 59, 74, 0.72);
  transform: translateY(-3px);
}

.page-about .about-next__name {
  grid-column: 1 / 2;
  grid-row: 1 / 2;
  font-size: 16px;
  font-weight: 700;
  color: var(--scoreboard-ivory);
}

.page-about .about-next__desc {
  grid-column: 1 / 2;
  grid-row: 2 / 3;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--mist-cyan);
}

.page-about .about-next__arrow {
  grid-column: 2 / 3;
  grid-row: 1 / span 2;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--coral-orange);
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .page-about .about-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 760px) {
  .page-about .about-reach__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-reach__card--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
  }

  .page-about .about-ops__head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: end;
    gap: clamp(24px, 4vw, 56px);
  }

  .page-about .about-timeline__item {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: clamp(20px, 3vw, 40px);
    padding-left: 40px;
    align-items: start;
  }

  .page-about .about-timeline__year {
    display: block;
  }

  .page-about .about-timeline__num {
    display: block;
    font-size: 34px;
  }

  .page-about .about-timeline__tag {
    display: inline-block;
    margin-top: 8px;
  }

  .page-about .about-timeline__figure {
    padding-left: 40px;
  }

  .page-about .about-member__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }
}

@media (min-width: 940px) {
  .page-about .about-ops__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (min-width: 1024px) {
  .page-about .about-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-years__link,
  .page-about .about-timeline__body,
  .page-about .about-ops__card,
  .page-about .about-eco__item,
  .page-about .about-next__link {
    transition: none;
  }

  .page-about .about-years__link:hover,
  .page-about .about-timeline__item:hover .about-timeline__body,
  .page-about .about-ops__card:hover,
  .page-about .about-eco__item:hover,
  .page-about .about-next__link:hover {
    transform: none;
  }
}