.page-about {
  --about-panel-pad: 18px;
  background: var(--deep-green);
  overflow-x: hidden;
}

/* ===== Hero ===== */
.page-about .about-hero {
  position: relative;
  padding: 28px 0 48px;
  background: var(--deep-green);
  background-image:
    linear-gradient(rgba(46, 75, 65, 0.32) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 75, 65, 0.32) 1px, transparent 1px);
  background-size: 32px 32px;
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 58%;
  height: 100%;
  background: linear-gradient(105deg, transparent 28%, rgba(213, 166, 79, 0.14) 28%, rgba(213, 166, 79, 0.24) 46%, transparent 46%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--gold), var(--soft-gold), transparent);
}

.page-about .about-hero .breadcrumb {
  position: relative;
  z-index: 1;
  color: rgba(242, 241, 232, 0.6);
  font-size: 13px;
}

.page-about .about-hero .breadcrumb a {
  color: var(--soft-gold);
  text-decoration: none;
}

.page-about .about-hero .breadcrumb a:hover {
  color: var(--neon-green);
}

.page-about .about-hero .breadcrumb__sep {
  margin: 0 6px;
  color: rgba(213, 166, 79, 0.7);
}

.page-about .about-hero .breadcrumb__current {
  color: var(--gold);
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 26px;
  margin-top: 28px;
}

.page-about .about-hero__content {
  color: var(--off-white);
}

.page-about .about-hero__content .tag {
  background: transparent;
  border-color: var(--gold);
  color: var(--gold);
}

.page-about .about-hero h1 {
  margin: 12px 0 14px;
  font-family: var(--font-heading);
  font-size: clamp(30px, 6vw, 52px);
  line-height: 1.12;
  letter-spacing: 0.02em;
  color: var(--off-white);
}

.page-about .about-hero__lead {
  max-width: 640px;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(242, 241, 232, 0.8);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-hero .btn--outline {
  border-color: rgba(242, 241, 232, 0.55);
  color: var(--off-white);
}

.page-about .about-hero__panel {
  position: relative;
  padding: var(--about-panel-pad);
  background: linear-gradient(145deg, rgba(46, 75, 65, 0.92), rgba(11, 36, 30, 0.96));
  border: 1px solid rgba(213, 166, 79, 0.42);
  box-shadow: 8px 8px 0 rgba(213, 166, 79, 0.08);
}

.page-about .about-hero__panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: var(--gold);
}

.page-about .about-hero__panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 12px;
  margin-bottom: 16px;
  border-bottom: 1px solid rgba(213, 166, 79, 0.3);
}

.page-about .about-hero__panel-title {
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--soft-gold);
  text-transform: uppercase;
}

.page-about .about-hero__panel-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px 14px;
}

.page-about .about-hero__stat {
  padding-top: 10px;
  border-top: 1px solid rgba(213, 166, 79, 0.25);
}

.page-about .about-hero__stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--gold);
  letter-spacing: 0.02em;
}

.page-about .about-hero__stat-label {
  display: block;
  margin-top: 5px;
  font-size: 12px;
  color: rgba(242, 241, 232, 0.62);
}

@media (min-width: 720px) {
  .page-about .about-hero {
    padding: 36px 0 64px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: 7fr 5fr;
    gap: 36px;
    align-items: center;
  }

  .page-about .about-hero__panel {
    padding: 22px;
  }

  .page-about .about-hero__stat-num {
    font-size: 30px;
  }
}

/* ===== 时间轴 ===== */
.page-about .about-timeline {
  background: #071c17;
  padding: 44px 0 52px;
  overflow: hidden;
}

.page-about .about-timeline__heading {
  color: var(--off-white);
}

.page-about .about-timeline__heading .section-heading__note,
.page-about .about-catalog__heading .section-heading__note,
.page-about .about-ecosystem__heading .section-heading__note {
  color: var(--gold);
}

.page-about .about-timeline__heading .section-heading__text,
.page-about .about-catalog__heading .section-heading__text,
.page-about .about-ecosystem__heading .section-heading__text {
  color: var(--off-white);
}

.page-about .about-timeline__intro {
  max-width: 640px;
  margin: 14px 0 30px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(242, 241, 232, 0.68);
}

.page-about .about-timeline__list {
  position: relative;
  display: grid;
  max-width: 860px;
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  top: 10px;
  bottom: 10px;
  left: 67px;
  width: 2px;
  background: linear-gradient(180deg, var(--gold), rgba(213, 166, 79, 0.15));
}

.page-about .about-timeline__item {
  position: relative;
  display: grid;
  grid-template-columns: 68px 1fr;
  gap: 14px;
  padding-bottom: 20px;
}

.page-about .about-timeline__year {
  padding-top: 11px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.4;
  text-align: right;
  color: var(--gold);
  letter-spacing: 0.04em;
}

.page-about .about-timeline__toggle {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 8px 0;
  background: none;
  border: 0;
  text-align: left;
  cursor: pointer;
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--off-white);
}

.page-about .about-timeline__dot {
  position: absolute;
  left: -19px;
  top: 15px;
  width: 10px;
  height: 10px;
  transform: rotate(45deg);
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(213, 166, 79, 0.2);
}

.page-about .about-timeline__content .expando__content-inner {
  max-width: 660px;
  padding: 4px 0 6px 20px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(242, 241, 232, 0.66);
}

.page-about .about-timeline__content .tag {
  margin-top: 10px;
}

@media (min-width: 720px) {
  .page-about .about-timeline__list::before {
    left: 107px;
  }

  .page-about .about-timeline__item {
    grid-template-columns: 108px 1fr;
  }

  .page-about .about-timeline__year {
    font-size: 14px;
  }

  .page-about .about-timeline__toggle {
    font-size: 19px;
  }
}

/* ===== 数据体系 ===== */
.page-about .about-data {
  background: var(--off-white);
  padding: 44px 0 56px;
}

.page-about .about-data__heading .section-heading__note,
.page-about .about-team__heading .section-heading__note {
  color: var(--gold);
}

.page-about .about-data__heading .section-heading__text,
.page-about .about-team__heading .section-heading__text {
  color: var(--deep-green);
}

.page-about .about-data__layout {
  display: grid;
  gap: 20px;
  margin-top: 24px;
}

.page-about .about-data__main {
  position: relative;
  padding: 20px;
  background-color: var(--deep-green);
  background-image:
    linear-gradient(rgba(46, 75, 65, 0.42) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 75, 65, 0.42) 1px, transparent 1px);
  background-size: 22px 22px;
  color: var(--off-white);
  overflow: hidden;
}

.page-about .about-data__topline {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 18px;
}

.page-about .about-data__update {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(242, 241, 232, 0.7);
}

.page-about .about-data__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin: 20px 0 24px;
  padding: 16px 0;
  border-top: 1px solid rgba(213, 166, 79, 0.2);
  border-bottom: 1px solid rgba(213, 166, 79, 0.2);
}

.page-about .about-data__stat {
  border-left: 2px solid var(--gold);
  padding-left: 10px;
}

.page-about .about-data__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--gold);
}

.page-about .about-data__label {
  display: block;
  margin-top: 5px;
  font-size: 12px;
  color: rgba(242, 241, 232, 0.7);
}

.page-about .about-data__figure {
  margin: 0;
  padding: 12px;
  background: rgba(11, 36, 30, 0.45);
  border: 1px solid rgba(213, 166, 79, 0.25);
}

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

.page-about .about-data__figure figcaption {
  margin-top: 8px;
  font-size: 12px;
  color: rgba(242, 241, 232, 0.55);
}

.page-about .about-data__aside {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-about .about-data__card {
  padding: 18px;
  background: #fff;
  border: 1px solid #dbd8ca;
}

.page-about .about-data__card h3 {
  margin: 0 0 8px;
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--deep-green);
}

.page-about .about-data__card p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mid-gray);
}

.page-about .about-data__dl {
  margin: 12px 0 0;
}

.page-about .about-data__dl div {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid #efebde;
}

.page-about .about-data__dl dt {
  font-size: 13px;
  color: var(--mid-gray);
}

.page-about .about-data__dl dd {
  margin: 0;
  font-weight: 700;
  color: var(--deep-green);
}

.page-about .about-data__card .btn--outline {
  color: var(--deep-green);
  border-color: var(--deep-green);
}

@media (min-width: 640px) {
  .page-about .about-data__num {
    font-size: 32px;
  }
}

@media (min-width: 960px) {
  .page-about .about-data__layout {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 24px;
    align-items: start;
  }

  .page-about .about-data__main {
    padding: 28px;
  }
}

/* ===== 内容目录 ===== */
.page-about .about-catalog {
  padding: 44px 0 56px;
  background: var(--deep-green);
  color: var(--off-white);
  overflow: hidden;
}

.page-about .about-catalog__layout {
  display: grid;
  gap: 0;
}

.page-about .about-catalog__intro {
  max-width: 560px;
  margin-bottom: 22px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(242, 241, 232, 0.72);
}

.page-about .about-catalog__count {
  margin-top: 18px;
  padding-left: 14px;
  border-left: 4px solid var(--gold);
}

.page-about .about-catalog__count-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 42px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-catalog__count-label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: rgba(242, 241, 232, 0.6);
}

.page-about .about-catalog__zones {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 20px;
}

.page-about .about-catalog__zone {
  position: relative;
  padding: 16px;
  background: rgba(46, 75, 65, 0.32);
  border: 1px solid rgba(213, 166, 79, 0.24);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.page-about .about-catalog__zone:hover {
  background: rgba(46, 75, 65, 0.55);
  border-color: var(--neon-green);
}

.page-about .about-catalog__zone-num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-about .about-catalog__zone h3 {
  margin: 0 0 4px;
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  color: var(--off-white);
}

.page-about .about-catalog__zone p {
  margin: 0 0 10px;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(242, 241, 232, 0.62);
}

.page-about .about-catalog__zone-tag {
  background: transparent;
  border-color: rgba(184, 247, 42, 0.4);
  color: var(--neon-green);
}

.page-about .about-catalog__figure {
  margin: 24px 0 0;
  background: rgba(11, 36, 30, 0.5);
  border: 1px solid rgba(213, 166, 79, 0.3);
}

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

.page-about .about-catalog__figure figcaption {
  padding: 8px 12px;
  font-size: 12px;
  color: rgba(242, 241, 232, 0.6);
  border-top: 1px solid rgba(213, 166, 79, 0.2);
}

@media (min-width: 540px) {
  .page-about .about-catalog__zones {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 860px) {
  .page-about .about-catalog__zones {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about .about-catalog__zone:last-child {
    grid-column: span 2;
  }
}

@media (min-width: 960px) {
  .page-about .about-catalog__layout {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 28px;
    align-items: start;
  }

  .page-about .about-catalog__intro {
    margin-bottom: 0;
  }

  .page-about .about-catalog__zones {
    grid-column: 2;
    grid-row: 1;
    margin-top: 0;
  }

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

/* ===== 内容团队 ===== */
.page-about .about-team {
  position: relative;
  padding: 44px 0 56px;
  background: var(--off-white);
  overflow: hidden;
}

.page-about .about-team::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 160px;
  height: 6px;
  background: linear-gradient(90deg, var(--gold), rgba(213, 166, 79, 0.2));
}

.page-about .about-team__layout {
  display: grid;
  gap: 24px;
  margin-top: 24px;
}

.page-about .about-team__text p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mid-gray);
}

.page-about .about-team__list {
  margin: 18px 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-about .about-team__list li {
  padding-left: 12px;
  border-left: 3px solid var(--gold);
  font-size: 14px;
  line-height: 1.7;
  color: var(--dark-gray);
}

.page-about .about-team__list strong {
  color: var(--deep-green);
}

.page-about .about-team__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.page-about .about-team__meta span {
  padding: 6px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.02em;
  background: var(--deep-green);
  color: var(--soft-gold);
}

.page-about .about-team__figure {
  margin: 0;
  padding: 10px;
  background: #fff;
  border: 1px solid #dbd8ca;
  box-shadow: 6px 6px 0 rgba(11, 36, 30, 0.06);
}

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

@media (min-width: 860px) {
  .page-about .about-team__layout {
    grid-template-columns: 5fr 6fr;
    gap: 32px;
    align-items: center;
  }
}

/* ===== 生态合作 ===== */
.page-about .about-ecosystem {
  padding: 44px 0 52px;
  background: #071c17;
  color: var(--off-white);
}

.page-about .about-ecosystem__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-ecosystem__card {
  position: relative;
  padding: 18px;
  background: linear-gradient(145deg, var(--dark-green), rgba(46, 75, 65, 0.35));
  border: 1px solid rgba(213, 166, 79, 0.3);
}

.page-about .about-ecosystem__card::after {
  content: "";
  position: absolute;
  top: 10px;
  right: 10px;
  width: 16px;
  height: 16px;
  border-top: 2px solid var(--gold);
  border-right: 2px solid var(--gold);
  opacity: 0.4;
}

.page-about .about-ecosystem__label {
  display: block;
  margin-bottom: 10px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--soft-gold);
}

.page-about .about-ecosystem__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 38px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-ecosystem__card p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(242, 241, 232, 0.68);
}

.page-about .about-ecosystem__network {
  margin-top: 22px;
  background: rgba(11, 36, 30, 0.5);
  border: 1px solid rgba(213, 166, 79, 0.25);
  overflow: hidden;
}

.page-about .about-ecosystem__svg {
  display: block;
  width: 100%;
  height: auto;
  min-height: 220px;
  font-family: var(--font-body);
}

.page-about .about-ecosystem__edge {
  fill: none;
  stroke: rgba(213, 166, 79, 0.55);
  stroke-width: 1.5;
  stroke-dasharray: 5 5;
}

.page-about .about-ecosystem__node--center {
  fill: var(--deep-green);
  stroke: var(--gold);
  stroke-width: 2;
}

.page-about .about-ecosystem__ring {
  fill: var(--dark-green);
  stroke: rgba(242, 241, 232, 0.7);
  stroke-width: 1.5;
  transition: fill 0.2s ease, stroke 0.2s ease, transform 0.2s ease;
}

.page-about .about-ecosystem__satellite {
  cursor: default;
}

.page-about .about-ecosystem__satellite:hover .about-ecosystem__ring {
  fill: var(--gold);
  stroke: var(--off-white);
}

.page-about .about-ecosystem__text {
  font-family: var(--font-body);
  font-size: 12px;
  fill: var(--off-white);
}

.page-about .about-ecosystem__text--small {
  font-size: 10px;
  fill: var(--soft-gold);
}

.page-about .about-ecosystem__text--strong {
  font-size: 14px;
  font-weight: 700;
}

.page-about .about-ecosystem__text--sat {
  font-size: 11px;
}

.page-about .about-ecosystem__text--sat-num {
  font-family: var(--font-mono);
  font-size: 10px;
  fill: var(--neon-green);
}

.page-about .about-ecosystem__satellite:hover .about-ecosystem__text--sat,
.page-about .about-ecosystem__satellite:hover .about-ecosystem__text--sat-num {
  fill: var(--deep-green);
}

.page-about .about-ecosystem__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.page-about .about-ecosystem .btn--outline {
  color: var(--off-white);
  border-color: rgba(242, 241, 232, 0.6);
}

@media (min-width: 640px) {
  .page-about .about-ecosystem__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}