.page-about {
  --ab-pad: clamp(58px, 9vw, 124px);
  --ab-gap: clamp(28px, 4vw, 56px);
  position: relative;
  background: var(--ink);
  color: var(--fog);
  font-family: var(--font-sans);
  overflow-x: clip;
}

.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(84px, 12vw, 148px) 0 clamp(48px, 7vw, 86px);
  background:
    radial-gradient(760px 460px at 86% 6%, rgba(242, 184, 75, 0.16), transparent 64%),
    radial-gradient(620px 480px at 2% 94%, rgba(53, 214, 255, 0.1), transparent 68%),
    var(--ink);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(242, 184, 75, 0.5), transparent);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 60px);
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(18px, 2.6vw, 28px);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  color: var(--graphite);
}

.page-about .breadcrumb a {
  color: rgba(244, 246, 250, 0.66);
  text-decoration: none;
  transition: color 0.3s var(--ease-out);
}

.page-about .breadcrumb a:hover {
  color: var(--gold);
}

.page-about .breadcrumb__sep {
  color: rgba(242, 184, 75, 0.55);
}

.page-about .about-hero h1 {
  margin: 10px 0 0;
  font-size: clamp(1.95rem, 5vw, 3.85rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.012em;
  text-wrap: balance;
  background: linear-gradient(102deg, var(--fog) 46%, var(--gold-light) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-hero__lede {
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  max-width: 42em;
  font-size: clamp(0.98rem, 1.25vw, 1.1rem);
  line-height: 1.9;
  color: rgba(244, 246, 250, 0.8);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: clamp(24px, 3.2vw, 38px);
}

.page-about .about-hero__art {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 240px;
  padding-bottom: 42px;
}

.page-about .about-hero__art svg {
  width: 100%;
  max-width: 400px;
  height: auto;
  filter: drop-shadow(0 24px 52px rgba(242, 184, 75, 0.18));
}

.page-about .about-hero__badge {
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  padding: 8px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(13, 17, 28, 0.85);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--gold-light);
  white-space: nowrap;
}

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

/* ---------- 章节骨架 ---------- */

.page-about .about-sec {
  position: relative;
  padding: var(--ab-pad) 0;
}

.page-about .about-sec--ink {
  background: var(--ink);
}

.page-about .about-sec--ink2 {
  background: var(--ink-2);
}

.page-about .about-sec--paper {
  background: var(--paper);
  color: var(--ink);
}

.page-about .about-sec--paper::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold) 0%, rgba(107, 74, 24, 0.35) 46%, transparent 82%);
}

.page-about .about-chapter-head {
  max-width: 940px;
  padding-top: clamp(16px, 2vw, 26px);
  margin-bottom: clamp(26px, 4vw, 46px);
  border-top: 2px solid rgba(242, 184, 75, 0.5);
}

.page-about .about-sec--paper .about-chapter-head {
  border-top-color: rgba(107, 74, 24, 0.42);
}

.page-about .about-num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: clamp(2.4rem, 6.5vw, 4.6rem);
  font-weight: 700;
  line-height: 0.9;
  letter-spacing: -0.02em;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(242, 184, 75, 0.72);
}

.page-about .about-sec--paper .about-num {
  -webkit-text-stroke: 1.5px rgba(107, 74, 24, 0.55);
}

.page-about .about-kicker {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 0.76rem;
  letter-spacing: 0.3em;
  color: var(--graphite);
}

.page-about .about-sec--paper .about-kicker {
  color: rgba(107, 74, 24, 0.85);
}

.page-about .about-h2 {
  margin: 12px 0 0;
  font-size: clamp(1.45rem, 3.1vw, 2.45rem);
  font-weight: 800;
  line-height: 1.28;
  letter-spacing: -0.01em;
  text-wrap: balance;
  color: var(--fog);
}

.page-about .about-sec--paper .about-h2 {
  color: var(--ink);
}

.page-about .about-lead {
  margin: 0;
  max-width: 60em;
  font-size: clamp(0.98rem, 1.1vw, 1.06rem);
  line-height: 1.9;
  color: rgba(244, 246, 250, 0.78);
}

.page-about .about-sec--paper .about-lead {
  color: rgba(7, 8, 12, 0.72);
}

/* ---------- 分栏与正文 ---------- */

.page-about .about-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--ab-gap);
}

.page-about .about-copy p {
  margin: 0 0 1.1em;
  font-size: clamp(0.96rem, 1.05vw, 1.05rem);
  line-height: 1.9;
  color: rgba(244, 246, 250, 0.8);
}

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

.page-about .about-sec--paper .about-copy p {
  color: rgba(7, 8, 12, 0.76);
}

.page-about .about-copy--below {
  margin-top: clamp(26px, 3.6vw, 40px);
  max-width: 66em;
}

.page-about .about-points {
  list-style: none;
  margin: 1.5em 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-points li {
  position: relative;
  padding-left: 24px;
  font-size: 0.96rem;
  line-height: 1.82;
  color: rgba(7, 8, 12, 0.76);
}

.page-about .about-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 11px;
  height: 2px;
  background: var(--gold);
}

.page-about .about-points strong {
  color: var(--ink);
  font-weight: 700;
}

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

.page-about .about-figure .media-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.page-about .about-figure figcaption {
  margin-top: 12px;
  font-family: var(--font-serif);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  line-height: 1.7;
  color: var(--graphite);
}

.page-about .about-sec--paper .about-figure figcaption {
  color: rgba(7, 8, 12, 0.55);
}

/* ---------- 团队筛选 ---------- */

.page-about .about-filter {
  display: flex;
  gap: 10px;
  margin: clamp(30px, 4vw, 50px) 0 clamp(18px, 2.6vw, 26px);
  padding: 4px 2px 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-filter::-webkit-scrollbar {
  display: none;
}

.page-about .about-filter .chip {
  flex: 0 0 auto;
  white-space: nowrap;
}

.page-about .about-filter .chip[aria-pressed="true"] {
  background: var(--gold);
  border-color: var(--gold);
  color: #0B0D13;
}

.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2vw, 20px);
}

.page-about .about-team__card {
  position: relative;
  padding: clamp(20px, 2.4vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(168deg, rgba(20, 26, 41, 0.92), rgba(13, 17, 28, 0.74));
  box-shadow: var(--shadow-float);
  transition: transform 0.35s var(--ease-out), border-color 0.35s var(--ease-out);
}

.page-about .about-team__card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 217, 138, 0.6);
}

.page-about .about-team__card h3 {
  margin: 12px 0 8px;
  font-size: 1.04rem;
  font-weight: 700;
  line-height: 1.42;
  color: var(--fog);
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: rgba(244, 246, 250, 0.72);
}

.page-about .about-team__card p.about-team__out {
  margin-top: 16px;
  padding-top: 13px;
  border-top: 1px dashed var(--line-soft);
  font-family: var(--font-mono);
  font-size: 0.73rem;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-about .filter-empty {
  margin: 20px 0 0;
  padding: 18px 20px;
  border: 1px dashed var(--line);
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--graphite);
}

/* ---------- 流程 ---------- */

.page-about .about-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--ab-gap);
}

.page-about .about-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 3px;
  counter-reset: aboutstep;
}

.page-about .about-steps li {
  position: relative;
  padding: 18px 20px 18px 64px;
  border-left: 2px solid rgba(242, 184, 75, 0.4);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: linear-gradient(90deg, rgba(242, 184, 75, 0.09), rgba(242, 184, 75, 0) 82%);
}

.page-about .about-steps li::before {
  counter-increment: aboutstep;
  content: counter(aboutstep, decimal-leading-zero);
  position: absolute;
  left: 18px;
  top: 18px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--gold);
}

.page-about .about-steps strong {
  display: block;
  margin-bottom: 6px;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--fog);
}

.page-about .about-steps p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.8;
  color: rgba(244, 246, 250, 0.74);
}

.page-about .about-meter {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: var(--ab-gap);
}

.page-about .about-meter__item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(7, 8, 12, 0.42);
  font-size: 0.9rem;
  line-height: 1.6;
  color: rgba(244, 246, 250, 0.74);
}

.page-about .about-meter__n {
  font-family: var(--font-mono);
  font-size: 1.32rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--neon);
  white-space: nowrap;
}

/* ---------- 覆盖数据 ---------- */

.page-about .about-stats {
  list-style: none;
  margin: clamp(26px, 3.6vw, 42px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(16px, 2.4vw, 26px);
}

.page-about .about-stats li {
  padding-top: 18px;
  border-top: 1px solid rgba(107, 74, 24, 0.24);
}

.page-about .about-stats__n {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.85rem, 3.6vw, 2.7rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-about .about-stats li:nth-child(3n + 2) .about-stats__n {
  color: var(--gold-deep);
}

.page-about .about-stats__l {
  display: block;
  margin-top: 9px;
  font-size: 0.88rem;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: rgba(7, 8, 12, 0.62);
}

/* ---------- 合作 ---------- */

.page-about .about-partner-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-partner-list li {
  padding: 14px 16px;
  border-left: 2px solid var(--gold);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: rgba(242, 184, 75, 0.07);
  font-size: 0.9rem;
  line-height: 1.75;
  color: rgba(244, 246, 250, 0.76);
}

.page-about .about-partner-list strong {
  display: block;
  margin-bottom: 3px;
  font-size: 0.96rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold-light);
}

/* ---------- 版本时间轴 ---------- */

.page-about .about-timeline {
  position: relative;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0 0 0 26px;
  border-left: 1px solid rgba(242, 184, 75, 0.3);
  display: grid;
  gap: clamp(18px, 2.6vw, 28px);
}

.page-about .about-timeline__item {
  position: relative;
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 9px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink-2);
  border: 2px solid var(--gold);
}

.page-about .about-timeline__item > summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  list-style: none;
  cursor: pointer;
}

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

.page-about .about-timeline__item > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1rem;
  color: var(--gold);
  transition: transform 0.3s var(--ease-out);
}

.page-about .about-timeline__item[open] > summary::after {
  content: "−";
}

.page-about .about-timeline__ver {
  display: inline-block;
  padding: 3px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-about .about-timeline__item h3 {
  margin: 0;
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--fog);
}

.page-about .about-timeline__item p {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-soft);
  font-size: 0.92rem;
  line-height: 1.85;
  color: rgba(244, 246, 250, 0.74);
}

/* ---------- 收尾行动 ---------- */

.page-about .about-cta {
  position: relative;
  padding: var(--ab-pad) 0;
  background:
    radial-gradient(680px 380px at 88% 0%, rgba(242, 184, 75, 0.14), transparent 66%),
    var(--ink);
}

.page-about .about-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.6vw, 44px);
}

.page-about .about-cta__copy h2 {
  margin: 12px 0 14px;
  font-size: clamp(1.4rem, 3vw, 2.2rem);
  font-weight: 800;
  line-height: 1.3;
  color: var(--fog);
}

.page-about .about-cta__copy p:last-child {
  margin: 0;
  max-width: 46em;
  font-size: 0.96rem;
  line-height: 1.9;
  color: rgba(244, 246, 250, 0.76);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-content: start;
}

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-partner-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: 1.32fr 0.88fr;
    align-items: center;
  }

  .page-about .about-split {
    grid-template-columns: 1.18fr 0.82fr;
    align-items: start;
  }

  .page-about .about-split--media {
    grid-template-columns: 1.05fr 0.95fr;
  }

  .page-about .about-flow {
    grid-template-columns: 0.92fr 1.08fr;
    align-items: start;
  }

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

  .page-about .about-cta__inner {
    grid-template-columns: 1.3fr 0.7fr;
    align-items: end;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
  }

  .page-about .about-hero__vnote {
    display: block;
    position: absolute;
    right: clamp(8px, 1.6vw, 22px);
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.72rem;
    letter-spacing: 0.4em;
    color: rgba(138, 144, 162, 0.8);
  }
}

@media (min-width: 1024px) {
  .page-about .about-team__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__card,
  .page-about .breadcrumb a {
    transition: none;
  }

  .page-about .about-team__card:hover {
    transform: none;
  }
}