.page-about {
  --about-hair: rgba(111, 133, 121, 0.26);
  --about-lime-soft: rgba(184, 255, 61, 0.12);
  --about-gap: clamp(16px, 2.6vw, 30px);
  --about-pad: clamp(18px, 3vw, 30px);
  color: var(--zy-paper);
  padding-bottom: clamp(40px, 6vw, 88px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(68px, 9vw, 120px);
  padding-bottom: clamp(26px, 4vw, 48px);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    118deg,
    rgba(31, 90, 69, 0.55) 0 1px,
    transparent 1px 54px
  );
  -webkit-mask-image: radial-gradient(120% 90% at 78% 6%, #000 0%, transparent 68%);
  mask-image: radial-gradient(120% 90% at 78% 6%, #000 0%, transparent 68%);
  pointer-events: none;
}

.page-about .about-hero .zy-container {
  position: relative;
  z-index: 1;
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--about-gap);
  margin-top: clamp(18px, 3vw, 32px);
}

.page-about .about-hero__title {
  margin: 10px 0 0;
  font-size: clamp(2rem, 6.2vw, 4.4rem);
  line-height: 1.02;
  letter-spacing: -0.045em;
  font-weight: 900;
  max-width: 18ch;
}

.page-about .about-hero__lead {
  margin: 0;
  color: var(--zy-paper-72);
  font-size: clamp(0.98rem, 1.4vw, 1.12rem);
  line-height: 1.85;
  max-width: 48ch;
  border-left: 2px solid var(--zy-amber);
  padding-left: clamp(14px, 2vw, 22px);
}

.page-about .about-hero__media {
  margin: clamp(24px, 4vw, 46px) 0 0;
  border-radius: var(--zy-radius-lg);
  overflow: hidden;
  border: 1px solid var(--about-hair);
  background: var(--zy-venue);
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  max-height: 420px;
  object-fit: cover;
}

.page-about .about-hero__caption {
  padding: 14px clamp(16px, 2.4vw, 26px) 18px;
  color: var(--zy-paper-58);
  font-size: 0.86rem;
  line-height: 1.7;
}

.page-about .zy-media__tag {
  display: inline-block;
  margin-right: 10px;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--about-lime-soft);
  color: var(--zy-lime);
  font-family: var(--zy-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
}

/* ---------- 数据条 ---------- */
.page-about .about-stats {
  list-style: none;
  margin: clamp(22px, 3.5vw, 38px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1px;
  background: var(--about-hair);
  border: 1px solid var(--about-hair);
  border-radius: var(--zy-radius);
  overflow: hidden;
}

.page-about .about-stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px clamp(14px, 2vw, 22px);
  background: var(--zy-venue);
}

.page-about .about-stats__num {
  font-size: clamp(1.7rem, 3.2vw, 2.3rem);
  line-height: 1;
  color: var(--zy-amber);
  letter-spacing: -0.02em;
}

.page-about .about-stats__label {
  font-size: 0.82rem;
  line-height: 1.6;
  color: var(--zy-paper-58);
}

/* ---------- 章节索引 ---------- */
.page-about .about-index {
  padding-block: clamp(20px, 3vw, 34px);
}

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

.page-about .about-index a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: 999px;
  border: 1px solid var(--about-hair);
  background: var(--zy-glass);
  color: var(--zy-paper);
  font-size: 0.84rem;
  text-decoration: none;
  transition: border-color 0.22s var(--zy-ease), background-color 0.22s var(--zy-ease),
    color 0.22s var(--zy-ease);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  border-color: var(--zy-lime);
  background: var(--about-lime-soft);
  color: var(--zy-lime);
  outline: none;
}

.page-about .about-index__no {
  font-family: var(--zy-font-mono);
  font-size: 0.74rem;
  color: var(--zy-lime);
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  position: relative;
  padding-block: clamp(38px, 5.5vw, 76px);
}

.page-about .about-chapter--tint {
  background: linear-gradient(180deg, rgba(14, 42, 34, 0.72), rgba(14, 42, 34, 0.24));
  border-top: 1px solid var(--about-hair);
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-chapter__inner {
  display: grid;
  gap: clamp(14px, 2.4vw, 26px);
}

.page-about .about-chapter__aside {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-about .about-chapter__no {
  display: block;
  font-family: var(--zy-font-mono);
  font-size: clamp(2.4rem, 6vw, 4rem);
  line-height: 0.9;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px var(--zy-line);
  letter-spacing: -0.04em;
}

.page-about .about-chapter__aside .zy-eyebrow {
  margin: 0;
  color: var(--zy-mist);
}

.page-about .about-chapter__title {
  margin: 0 0 clamp(12px, 2vw, 20px);
  font-size: clamp(1.45rem, 3.2vw, 2.35rem);
  line-height: 1.14;
  letter-spacing: -0.035em;
  font-weight: 800;
}

.page-about .about-chapter__p {
  margin: 0 0 1em;
  color: var(--zy-paper-72);
  font-size: clamp(0.95rem, 1.3vw, 1.04rem);
  line-height: 1.85;
  max-width: 64ch;
}

.page-about .about-chapter__p a {
  color: var(--zy-lime);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-chapter__figure {
  margin: clamp(22px, 3.5vw, 40px) 0 0;
  border-radius: var(--zy-radius-lg);
  overflow: hidden;
  border: 1px solid var(--about-hair);
  background: var(--zy-ink);
}

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

.page-about .about-chapter__figure .zy-media__caption {
  padding: 14px clamp(16px, 2.4vw, 26px) 18px;
  color: var(--zy-paper-58);
  font-size: 0.86rem;
  line-height: 1.7;
}

/* ---------- 旁注 ---------- */
.page-about .about-note {
  margin-top: clamp(18px, 2.6vw, 28px);
  padding: 16px clamp(16px, 2.4vw, 22px);
  border-radius: var(--zy-radius);
  border: 1px solid var(--about-hair);
  border-left: 3px solid var(--zy-lime);
  background: var(--zy-glass);
  max-width: 62ch;
}

.page-about .about-note p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--zy-paper-72);
}

.page-about .about-note__label {
  font-family: var(--zy-font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--zy-lime);
  margin-bottom: 6px;
}

/* ---------- 四类内容 ---------- */
.page-about .about-pillars {
  display: grid;
  gap: 12px;
  margin-top: clamp(16px, 2.4vw, 26px);
  grid-template-columns: 1fr;
}

.page-about .about-pillar {
  position: relative;
  padding: clamp(18px, 2.6vw, 24px);
  background: rgba(7, 19, 15, 0.72);
  border: 1px solid var(--about-hair);
  border-radius: var(--zy-radius);
  overflow: hidden;
}

.page-about .about-pillar::after {
  content: "";
  position: absolute;
  right: -30px;
  bottom: -40px;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(184, 255, 61, 0.16), transparent 70%);
  pointer-events: none;
}

.page-about .about-pillar__no {
  display: block;
  font-family: var(--zy-font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.1em;
  color: var(--zy-amber);
}

.page-about .about-pillar__title {
  margin: 8px 0 8px;
  font-size: 1.06rem;
  letter-spacing: -0.01em;
  color: var(--zy-paper);
}

.page-about .about-pillar p {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.75;
  color: var(--zy-paper-58);
}

.page-about .about-chain {
  margin-top: clamp(16px, 2.4vw, 24px);
  padding: 14px clamp(14px, 2vw, 20px);
  border-radius: 999px;
  border: 1px dashed rgba(184, 255, 61, 0.4);
  color: var(--zy-paper-72);
  font-size: 0.82rem;
  line-height: 1.7;
  background: rgba(7, 19, 15, 0.5);
}

.page-about .about-chain span {
  color: var(--zy-lime);
  padding: 0 4px;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  list-style: none;
  margin: clamp(18px, 3vw, 30px) 0 0;
  padding: 0 0 8px;
  display: grid;
  gap: 12px;
}

.page-about .about-timeline > li {
  min-width: 0;
}

.page-about .about-timeline details {
  height: 100%;
  padding: 16px 18px;
  border-radius: var(--zy-radius);
  border: 1px solid var(--about-hair);
  background: linear-gradient(180deg, rgba(14, 42, 34, 0.92), rgba(7, 19, 15, 0.92));
  transition: border-color 0.22s var(--zy-ease);
}

.page-about .about-timeline details[open] {
  border-color: rgba(184, 255, 61, 0.5);
}

.page-about .about-timeline summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  gap: 4px;
  position: relative;
  padding-right: 22px;
}

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

.page-about .about-timeline summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 2px;
  font-family: var(--zy-font-mono);
  color: var(--zy-lime);
  font-size: 0.95rem;
  line-height: 1;
}

.page-about .about-timeline details[open] summary::after {
  content: "–";
}

.page-about .about-timeline summary:focus-visible {
  outline: 2px solid var(--zy-lime);
  outline-offset: 4px;
  border-radius: 6px;
}

.page-about .about-timeline__stage {
  font-family: var(--zy-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.09em;
  color: var(--zy-amber);
}

.page-about .about-timeline__name {
  font-size: 0.98rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--zy-paper);
}

.page-about .about-timeline details p {
  margin: 10px 0 0;
  font-size: 0.84rem;
  line-height: 1.75;
  color: var(--zy-paper-58);
}

/* ---------- 服务对象 ---------- */
.page-about .about-audience {
  display: grid;
  gap: 12px;
  margin-top: clamp(16px, 2.4vw, 26px);
  grid-template-columns: 1fr;
}

.page-about .about-audience__item {
  padding: clamp(18px, 2.6vw, 24px);
  border-radius: var(--zy-radius);
  background: var(--zy-paper);
  color: var(--zy-char);
}

.page-about .about-audience__item h3 {
  margin: 0 0 10px;
  font-size: 1.04rem;
  line-height: 1.35;
  letter-spacing: -0.01em;
  color: var(--zy-char);
}

.page-about .about-audience__item p {
  margin: 0 0 14px;
  font-size: 0.86rem;
  line-height: 1.75;
  color: rgba(34, 42, 38, 0.78);
}

.page-about .about-audience__item a {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--zy-char);
  text-decoration: none;
  border-bottom: 2px solid var(--zy-lime);
  padding-bottom: 2px;
}

.page-about .about-audience__item a:hover,
.page-about .about-audience__item a:focus-visible {
  color: #0E2A22;
  border-bottom-color: #0E2A22;
  outline: none;
}

/* ---------- 团队与协作 ---------- */
.page-about .about-team {
  display: grid;
  gap: clamp(16px, 2.6vw, 28px);
  margin-top: clamp(18px, 3vw, 30px);
}

.page-about .about-team__stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 10px;
}

.page-about .about-team__stats li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  border-radius: var(--zy-radius);
  border: 1px solid var(--about-hair);
  background: rgba(7, 19, 15, 0.66);
  font-size: 0.8rem;
  line-height: 1.5;
  color: var(--zy-paper-58);
}

.page-about .about-team__num {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  line-height: 1;
  color: var(--zy-lime);
  letter-spacing: -0.02em;
}

.page-about .about-team__panel {
  display: grid;
  gap: 14px;
}

.page-about .about-team__groups details {
  padding: 14px 18px;
  border-radius: 16px;
  border: 1px solid var(--about-hair);
  background: var(--zy-glass);
  margin-bottom: 8px;
}

.page-about .about-team__groups summary {
  list-style: none;
  cursor: pointer;
  font-size: 0.94rem;
  font-weight: 700;
  color: var(--zy-paper);
  position: relative;
  padding-right: 20px;
}

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

.page-about .about-team__groups summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: -1px;
  font-family: var(--zy-font-mono);
  color: var(--zy-amber);
}

.page-about .about-team__groups details[open] summary::after {
  content: "–";
}

.page-about .about-team__groups summary:focus-visible {
  outline: 2px solid var(--zy-lime);
  outline-offset: 4px;
  border-radius: 6px;
}

.page-about .about-team__groups p {
  margin: 10px 0 0;
  font-size: 0.84rem;
  line-height: 1.75;
  color: var(--zy-paper-58);
}

.page-about .about-team__figure {
  margin: 0;
  border-radius: var(--zy-radius);
  overflow: hidden;
  border: 1px solid var(--about-hair);
  background: var(--zy-ink);
}

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

.page-about .about-team__figure .zy-media__caption {
  padding: 12px 18px 16px;
  color: var(--zy-paper-58);
  font-size: 0.82rem;
  line-height: 1.7;
}

.page-about .about-net {
  display: block;
  width: 100%;
  max-width: 340px;
  height: auto;
  margin-inline: auto;
}

.page-about .about-net__links line {
  stroke: rgba(31, 90, 69, 0.85);
  stroke-width: 1;
}

.page-about .about-net__hub circle {
  fill: var(--about-lime-soft);
  stroke: var(--zy-lime);
  stroke-width: 1.5;
}

.page-about .about-net__nodes circle {
  fill: var(--zy-amber);
}

/* ---------- 运营原则 ---------- */
.page-about .about-principles {
  list-style: none;
  margin: clamp(16px, 2.6vw, 26px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-principles li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding-block: clamp(14px, 2vw, 20px);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-principles li:last-child {
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-principles__no {
  font-family: var(--zy-font-mono);
  font-size: 0.86rem;
  color: var(--zy-amber);
  line-height: 1.6;
}

.page-about .about-principles h3 {
  margin: 0 0 6px;
  font-size: 0.98rem;
  letter-spacing: -0.01em;
  color: var(--zy-paper);
}

.page-about .about-principles p {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.78;
  color: var(--zy-paper-58);
  max-width: 62ch;
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  padding-top: clamp(34px, 5vw, 64px);
}

.page-about .about-cta__panel {
  display: grid;
  gap: clamp(18px, 3vw, 32px);
  padding: clamp(24px, 4vw, 48px);
  border-radius: var(--zy-radius-lg);
  border: 1px solid var(--about-hair);
  background:
    repeating-linear-gradient(
      118deg,
      rgba(184, 255, 61, 0.05) 0 1px,
      transparent 1px 48px
    ),
    linear-gradient(150deg, rgba(14, 42, 34, 0.95), rgba(7, 19, 15, 0.95));
  box-shadow: var(--zy-shadow);
}

.page-about .about-cta__title {
  margin: 8px 0 10px;
  font-size: clamp(1.4rem, 3vw, 2.1rem);
  line-height: 1.15;
  letter-spacing: -0.035em;
  font-weight: 800;
}

.page-about .about-cta__copy p {
  margin: 0;
  color: var(--zy-paper-72);
  font-size: 0.92rem;
  line-height: 1.8;
  max-width: 52ch;
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-content: flex-start;
}

.page-about .about-cta__actions .zy-btn {
  flex: 0 1 auto;
}

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

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

  .page-about .about-team__panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-net {
    grid-column: 1 / -1;
    max-width: 420px;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: clamp(24px, 4vw, 56px);
  }

  .page-about .about-chapter__inner {
    grid-template-columns: minmax(120px, 176px) minmax(0, 1fr);
    gap: clamp(24px, 4vw, 60px);
  }

  .page-about .about-chapter__aside {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    position: sticky;
    top: 118px;
    align-self: start;
  }

  .page-about .about-timeline {
    grid-auto-flow: column;
    grid-auto-columns: minmax(238px, 1fr);
    align-items: start;
    overflow-x: auto;
    scroll-snap-type: x proximity;
    padding-bottom: 16px;
  }

  .page-about .about-timeline > li {
    scroll-snap-align: start;
  }

  .page-about .about-pillars {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .about-cta__panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }

  .page-about .about-cta__actions {
    justify-content: flex-end;
    max-width: 340px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about *,
  .page-about *::before,
  .page-about *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .page-about .about-chapter__aside {
    position: static;
  }
}