/* ===== 我们是谁 · 页面专属样式（作用域 .page-about） ===== */
.page-about {
  --about-cut: 18px;
  --about-rule: rgba(169, 188, 179, .18);
  --about-rule-strong: rgba(47, 243, 208, .30);
  --about-glow: rgba(47, 243, 208, .10);
  display: block;
  overflow-x: hidden;
}

.page-about .breadcrumb {
  padding: 20px var(--gutter) 0;
  max-width: var(--shell);
  margin: 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .02em;
}

/* ---------- 刊头式开场 ---------- */
.page-about .about-mast {
  position: relative;
  padding: clamp(26px, 5vw, 54px) 0 clamp(38px, 6vw, 76px);
  background:
    radial-gradient(130% 100% at 8% 0%, var(--about-glow), transparent 58%),
    linear-gradient(158deg, var(--turf-deep) 0%, var(--turf) 58%, #0d4b37 100%);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-mast::after {
  content: "";
  position: absolute;
  inset: auto 0 0 auto;
  width: min(46%, 520px);
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--cyan));
  opacity: .8;
}

.page-about .about-mast__grid {
  display: grid;
  gap: 34px;
}

.page-about .about-mast__title {
  font-family: var(--font-display);
  font-size: clamp(42px, 11vw, 74px);
  line-height: 1;
  letter-spacing: -.015em;
  margin: 10px 0 20px;
  color: var(--ivory);
}

.page-about .about-mast__intro {
  max-width: 60ch;
  font-size: clamp(16px, 2.2vw, 18px);
  line-height: 1.8;
  color: rgba(244, 247, 245, .84);
  margin: 0 0 28px;
}

.page-about .about-mast__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .year-index {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--about-rule);
}

.page-about .year-index__item {
  border-bottom: 1px solid var(--about-rule);
}

.page-about .year-index__link {
  display: grid;
  grid-template-columns: 84px 1fr;
  align-items: baseline;
  gap: 16px;
  padding: 12px 6px;
  text-decoration: none;
  color: var(--ivory);
  transition: background var(--ease), padding-left var(--ease);
}

.page-about .year-index__link:hover,
.page-about .year-index__link:focus-visible {
  background: rgba(47, 243, 208, .09);
  padding-left: 16px;
  outline: none;
}

.page-about .year-index__year {
  font-family: var(--font-num);
  font-size: 30px;
  line-height: 1;
  color: var(--cyan);
}

.page-about .year-index__label {
  font-size: 14px;
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 章节索引条 ---------- */
.page-about .about-index {
  background: linear-gradient(180deg, rgba(27, 42, 58, .72), rgba(11, 61, 46, .34));
  border-bottom: 1px solid var(--about-rule);
  padding: 14px 0;
}

.page-about .about-index .toc__title {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--mist);
  margin: 0 0 8px;
  text-transform: uppercase;
}

.page-about .about-index .toc__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-index .toc__link {
  display: inline-block;
  padding: 6px 14px;
  font-size: 14px;
  text-decoration: none;
  color: var(--ivory);
  border: 1px solid var(--about-rule);
  background: rgba(6, 42, 32, .5);
  clip-path: polygon(8px 0, 100% 0, 100% 100%, 0 100%, 0 8px);
  transition: color var(--ease), border-color var(--ease), background var(--ease);
}

.page-about .about-index .toc__link:hover,
.page-about .about-index .toc__link[aria-current="true"] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 通用章节微调 ---------- */
.page-about .about-section {
  position: relative;
}

.page-about .about-section--panel {
  background:
    linear-gradient(180deg, rgba(27, 42, 58, .55), rgba(6, 42, 32, .78)),
    repeating-linear-gradient(115deg, transparent 0 34px, rgba(47, 243, 208, .035) 34px 36px);
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-section--mid {
  background: linear-gradient(140deg, var(--turf) 0%, #10563d 100%);
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-link,
.page-about .about-beijing__more a,
.page-about .about-reach__intro a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--about-rule-strong);
  transition: color var(--ease), border-color var(--ease);
}

.page-about .about-beijing__more a:hover,
.page-about .about-reach__intro a:hover {
  color: var(--orange);
  border-color: var(--orange);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 30px 0 0;
  padding: 0 0 0 30px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 8px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), var(--cyan-deep) 55%, rgba(255, 107, 53, .75));
}

.page-about .about-timeline .timeline__item {
  position: relative;
  padding-bottom: 28px;
}

.page-about .about-timeline .timeline__marker {
  position: absolute;
  left: -30px;
  top: 6px;
  width: 12px;
  height: 12px;
  background: var(--cyan);
  transform: rotate(45deg);
  box-shadow: 0 0 0 4px rgba(47, 243, 208, .14);
}

.page-about .about-timeline .timeline__time {
  font-family: var(--font-num);
  font-size: 26px;
  line-height: 1;
  color: var(--cyan);
  margin: 0 0 6px;
  letter-spacing: .04em;
}

.page-about .about-timeline .timeline__title {
  font-family: var(--font-display);
  font-size: 20px;
  margin: 0 0 8px;
  color: var(--ivory);
}

.page-about .about-timeline .timeline__body p {
  margin: 0;
  color: var(--mist);
  line-height: 1.75;
  font-size: 15.5px;
}

/* ---------- 数字锚点 ---------- */
.page-about .about-anchor {
  margin-top: 8px;
  padding: 22px 20px;
  background: var(--panel);
  border: 1px solid var(--about-rule-strong);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
}

.page-about .about-anchor .stat-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-about .about-anchor .stat__value {
  font-family: var(--font-num);
  font-size: clamp(36px, 8vw, 52px);
  line-height: 1;
  color: var(--cyan);
  margin: 0 0 6px;
}

.page-about .about-anchor .stat__label {
  margin: 0;
  font-size: 14px;
  color: var(--mist);
  letter-spacing: .02em;
}

/* ---------- 运转方式 ---------- */
.page-about .about-desk {
  display: grid;
  gap: 30px;
  margin-top: 30px;
}

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

.page-about .about-figure .media-frame {
  display: block;
  width: 100%;
  border: 1px solid var(--about-rule);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, var(--about-cut) 100%, 0 calc(100% - var(--about-cut)));
  background: linear-gradient(150deg, rgba(27, 42, 58, .8), rgba(6, 42, 32, .9));
  overflow: hidden;
}

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

.page-about .about-figure .figure__caption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

.page-about .segment__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 6px;
  background: rgba(6, 42, 32, .72);
  border: 1px solid var(--about-rule);
}

.page-about .segment__btn {
  flex: 1 1 130px;
  min-width: 118px;
  padding: 12px 16px;
  border: 0;
  background: transparent;
  color: var(--mist);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: background var(--ease), color var(--ease);
  clip-path: polygon(8px 0, 100% 0, 100% 100%, 0 100%, 0 8px);
}

.page-about .segment__btn:hover {
  background: rgba(47, 243, 208, .12);
  color: var(--ivory);
}

.page-about .segment__btn[aria-selected="true"] {
  background: var(--cyan);
  color: var(--ink);
}

.page-about .segment__btn:focus-visible {
  outline: 2px solid var(--orange);
  outline-offset: 2px;
}

.page-about .segment__panel {
  padding: 22px 0 0;
}

.page-about .about-desk__lead {
  margin: 0 0 14px;
  font-size: 16.5px;
  line-height: 1.7;
  color: var(--ivory);
}

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

.page-about .about-list li {
  position: relative;
  padding-left: 22px;
  font-size: 15.5px;
  line-height: 1.75;
  color: rgba(244, 247, 245, .82);
}

.page-about .about-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 8px;
  height: 8px;
  background: var(--orange);
  transform: rotate(45deg);
}

.page-about .about-list--roomy {
  gap: 16px;
  margin-top: 6px;
}

.page-about .about-list--roomy strong {
  color: var(--cyan);
  font-weight: 600;
}

/* ---------- 上海与广东 ---------- */
.page-about .about-regions {
  gap: 32px;
  align-items: start;
}

.page-about .about-regions__cards {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.page-about .about-region-card {
  background: rgba(6, 42, 32, .58);
  border: 1px solid var(--about-rule);
  padding: 20px;
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, 0 100%);
}

.page-about .about-region-card .card__title {
  font-family: var(--font-display);
  font-size: 22px;
  margin: 0;
  color: var(--ivory);
}

.page-about .about-region-card .card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}

.page-about .about-region-card .card__body {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-about .about-figure--map .media-frame {
  max-width: 560px;
  margin-left: auto;
}

/* ---------- 北京看台 ---------- */
.page-about .about-beijing {
  gap: 32px;
  align-items: start;
}

.page-about .about-beijing__more {
  margin: 22px 0 0;
  font-size: 15.5px;
  color: var(--mist);
}

/* ---------- 团队与资质 ---------- */
.page-about .about-team {
  margin-top: 30px;
}

.page-about .about-team__card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px;
  background: linear-gradient(160deg, rgba(20, 107, 74, .55), rgba(6, 42, 32, .82));
  border: 1px solid var(--about-rule);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, var(--about-cut) 100%, 0 calc(100% - var(--about-cut)));
}

.page-about .about-team__card .card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.page-about .about-team__card .card__title {
  font-family: var(--font-display);
  font-size: 21px;
  margin: 0;
  color: var(--ivory);
}

.page-about .about-team__card .card__body {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(244, 247, 245, .82);
}

.page-about .about-team__card .card__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--cyan-deep);
  letter-spacing: .03em;
}

.page-about .about-credential {
  margin-top: 26px;
  border-top: 1px solid var(--about-rule-strong);
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-credential__row {
  display: grid;
  gap: 6px;
  padding: 16px 4px;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-credential__row:last-child {
  border-bottom: 0;
}

.page-about .about-credential__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mist);
  text-transform: uppercase;
}

.page-about .about-credential__value {
  font-size: 16px;
  line-height: 1.6;
  color: var(--ivory);
}

.page-about .about-credential__value.num {
  font-family: var(--font-num);
  font-size: 22px;
  letter-spacing: .04em;
  color: var(--cyan);
}

/* ---------- 合作生态 ---------- */
.page-about .about-partners {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-partners__item {
  position: relative;
  padding: 22px 20px 22px 26px;
  background: rgba(27, 42, 58, .62);
  border: 1px solid var(--about-rule);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
  transition: transform var(--ease), border-color var(--ease), background var(--ease);
}

.page-about .about-partners__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  bottom: 22px;
  width: 3px;
  background: var(--orange);
}

.page-about .about-partners__item:hover {
  transform: translateY(-3px);
  border-color: var(--about-rule-strong);
  background: rgba(27, 42, 58, .86);
}

.page-about .about-partners__count {
  font-family: var(--font-num);
  font-size: clamp(40px, 9vw, 58px);
  line-height: 1;
  color: var(--cyan);
  margin: 0 0 6px;
}

.page-about .about-partners__name {
  font-family: var(--font-display);
  font-size: 19px;
  margin: 0 0 10px;
  color: var(--ivory);
}

.page-about .about-partners__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-honor {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  align-items: start;
  margin-top: 28px;
  padding: 22px 20px;
  background: linear-gradient(120deg, rgba(255, 107, 53, .16), rgba(11, 61, 46, .5));
  border: 1px solid rgba(255, 107, 53, .38);
  clip-path: polygon(var(--about-cut) 0, 100% 0, 100% 100%, 0 100%, 0 var(--about-cut));
}

.page-about .about-honor__badge {
  font-family: var(--font-num);
  font-size: 34px;
  line-height: 1;
  color: var(--orange);
  margin: 0;
}

.page-about .about-honor__title {
  font-family: var(--font-display);
  font-size: 20px;
  margin: 0 0 8px;
  color: var(--ivory);
}

.page-about .about-honor__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(244, 247, 245, .82);
}

/* ---------- 沟通方式 ---------- */
.page-about .about-reach__grid {
  display: grid;
  gap: 30px;
}

.page-about .about-reach__hint {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
  color: var(--cyan-deep);
}

.page-about .about-reach__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--about-rule-strong);
}

.page-about .about-reach__item {
  display: grid;
  gap: 6px;
  padding: 18px 4px;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .about-reach__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-about .about-reach__value {
  font-size: 18px;
  line-height: 1.5;
  color: var(--ivory);
  text-decoration: none;
  word-break: break-word;
}

.page-about a.about-reach__value {
  color: var(--cyan);
  transition: color var(--ease);
}

.page-about a.about-reach__value:hover {
  color: var(--orange);
}

.page-about .about-reach__value.num {
  font-family: var(--font-num);
  font-size: 26px;
  letter-spacing: .05em;
}

.page-about .about-reach__note {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 滚动显现 ---------- */
.page-about [data-reveal] {
  transition: opacity .45s ease, transform .45s ease;
}

.page-about [data-reveal].is-in {
  opacity: 1;
  transform: none;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-about .about-anchor .stat-row {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

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

  .page-about .about-credential__row {
    grid-template-columns: 180px 1fr;
    align-items: baseline;
    gap: 20px;
  }

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

  .page-about .about-honor {
    grid-template-columns: 120px 1fr;
    padding: 26px 24px;
  }

  .page-about .about-honor__badge {
    font-size: 46px;
  }
}

/* ---------- 桌面端 ---------- */
@media (min-width: 960px) {
  .page-about .about-mast__grid {
    grid-template-columns: 1.15fr .85fr;
    align-items: start;
    gap: 56px;
  }

  .page-about .about-desk {
    grid-template-columns: 1.05fr .95fr;
    gap: 40px;
    align-items: start;
  }

  .page-about .about-regions,
  .page-about .about-beijing {
    grid-template-columns: 1.15fr .85fr;
    gap: 48px;
  }

  .page-about .about-beijing {
    grid-template-columns: .9fr 1.1fr;
  }

  .page-about .about-reach__grid {
    grid-template-columns: 1.1fr .9fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-mast {
    padding-top: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about [data-reveal],
  .page-about .about-partners__item,
  .page-about .year-index__link {
    transition: none;
  }

  .page-about [data-reveal] {
    opacity: 1;
    transform: none;
  }
}