.page-about {
  --about-gap: 18px;
  --about-radius: 4px;
  background: var(--ink);
  color: var(--cream);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding: 14px 0 10px;
  font-size: 13px;
  color: var(--steel);
}

.page-about .breadcrumbs a {
  color: var(--steel);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--amber-lite);
  border-bottom-color: var(--amber);
}

.page-about .breadcrumbs span[aria-hidden] {
  margin: 0 8px;
  color: var(--pitch);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 34px 0 40px;
  border-bottom: 3px solid var(--brown);
  background:
    radial-gradient(115% 85% at 88% 0%, rgba(47, 158, 106, .34), transparent 62%),
    linear-gradient(158deg, var(--ink) 0%, var(--pitch-deep) 68%, var(--panel-2) 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -70px;
  width: 78%;
  height: 200px;
  background: repeating-linear-gradient(90deg, rgba(143, 163, 168, .16) 0 1px, transparent 1px 26px);
  transform: rotate(-3deg);
  pointer-events: none;
}

.page-about .about-hero__inner {
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: relative;
  z-index: 1;
}

.page-about .about-hero__eyebrow {
  margin: 0;
  padding-left: 11px;
  border-left: 3px solid var(--amber);
  font-size: 12px;
  letter-spacing: .1em;
  line-height: 1.7;
  color: var(--amber-lite);
}

.page-about .about-hero__title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(36px, 9.4vw, 88px);
  line-height: 1.03;
  letter-spacing: -.025em;
  color: var(--cream);
}

.page-about .about-hero__lede {
  margin: 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(244, 239, 227, .82);
}

.page-about .about-hero__meta {
  list-style: none;
  margin: 4px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .about-hero__meta li {
  padding: 10px 12px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--steel);
  background: rgba(18, 51, 38, .62);
  border: 1px solid var(--line-dark);
  border-left: 3px solid var(--pitch);
}

.page-about .about-hero__meta .num {
  display: block;
  font-family: var(--font-num);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: .02em;
  color: var(--amber);
}

/* ---------- 快速跳转 ---------- */
.page-about .about-index {
  background: var(--panel-2);
  border-bottom: 1px solid var(--line-dark);
}

.page-about .about-index__inner {
  display: flex;
  align-items: center;
  gap: 9px;
  padding-top: 12px;
  padding-bottom: 12px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-index__label {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--steel);
}

.page-about .about-index a {
  flex: 0 0 auto;
  padding: 6px 13px;
  font-size: 13px;
  color: var(--cream);
  text-decoration: none;
  white-space: nowrap;
  border: 1px solid var(--line-dark);
  border-radius: 999px;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  color: var(--ink);
  background: var(--amber-lite);
  border-color: var(--amber);
}

/* ---------- 章节外壳 ---------- */
.page-about .section {
  padding: 40px 0;
  border-bottom: 1px solid var(--line-dark);
}

.page-about .section__title {
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(24px, 5.4vw, 40px);
  line-height: 1.18;
  letter-spacing: -.015em;
  margin: 0;
}

.page-about .index-line {
  margin: 8px 0 0;
  font-size: 12px;
  letter-spacing: .05em;
  line-height: 1.7;
  color: var(--steel);
}

.page-about .section__head {
  margin-bottom: 22px;
}

/* ---------- 品牌起点 ---------- */
.page-about .about-brand__grid {
  display: grid;
  gap: 18px;
}

.page-about .about-brand__grid .prose {
  padding: 20px 18px;
  border: 3px solid var(--brown);
  box-shadow: var(--shadow-hard);
  border-radius: var(--about-radius);
}

.page-about .about-brand__grid .prose p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--brown);
}

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

.page-about .about-brand__aside {
  padding: 18px;
}

.page-about .about-brand__aside .panel__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
}

.page-about .about-audience {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-audience li {
  padding-top: 12px;
  border-top: 1px dashed var(--line-dark);
}

.page-about .about-audience li:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-audience p {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--steel);
}

/* ---------- 版本演进时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
}

.page-about .about-timeline__list {
  list-style: none;
  margin: 0;
  padding: 0 0 14px;
  display: grid;
  grid-auto-flow: column;
  grid-auto-columns: 82%;
  gap: 14px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  scrollbar-width: thin;
  scrollbar-color: var(--pitch) transparent;
}

.page-about .about-timeline__list::-webkit-scrollbar {
  height: 6px;
}

.page-about .about-timeline__list::-webkit-scrollbar-thumb {
  background: var(--pitch);
  border-radius: 999px;
}

.page-about .about-stage {
  position: relative;
  scroll-snap-align: start;
  padding: 30px 18px 18px;
  background: var(--panel);
  border: 3px solid var(--brown);
  border-top: 3px solid var(--pitch);
  border-radius: var(--about-radius);
  box-shadow: var(--shadow-dark);
}

.page-about .about-stage:nth-child(2) {
  border-top-color: var(--amber);
}

.page-about .about-stage:nth-child(3) {
  border-top-color: var(--amber-lite);
}

.page-about .about-stage::after {
  content: "";
  position: absolute;
  top: 12px;
  left: 18px;
  right: 18px;
  height: 6px;
  background-image: repeating-linear-gradient(90deg, rgba(143, 163, 168, .38) 0 1px, transparent 1px 11px);
}

.page-about .about-stage__tick {
  position: absolute;
  top: 8px;
  left: 50%;
  width: 14px;
  height: 14px;
  margin-left: -7px;
  border-radius: 50%;
  background: var(--pitch);
  border: 2px solid var(--ink);
  box-shadow: 0 0 0 3px rgba(47, 158, 106, .22);
}

.page-about .about-stage:nth-child(2) .about-stage__tick {
  background: var(--amber);
  box-shadow: 0 0 0 3px rgba(242, 169, 59, .22);
}

.page-about .about-stage:nth-child(3) .about-stage__tick {
  background: var(--amber-lite);
  box-shadow: 0 0 0 3px rgba(255, 215, 154, .22);
}

.page-about .about-stage__kicker {
  margin: 0;
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--steel);
}

.page-about .about-stage__title {
  margin: 6px 0 10px;
  font-size: 20px;
  font-weight: 900;
  color: var(--cream);
}

.page-about .about-stage p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.76;
  color: var(--steel);
}

.page-about .about-stage__note {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--line-dark);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--amber-lite) !important;
}

/* ---------- 四条主线 ---------- */
.page-about .about-pillars__grid {
  display: grid;
  gap: 14px;
}

.page-about .about-pillar {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 18px;
  background: var(--panel-2);
  border: 3px solid var(--brown);
  border-radius: var(--about-radius);
  box-shadow: var(--shadow-dark);
  transition: transform .25s var(--ease);
}

.page-about .about-pillar:hover {
  transform: translateY(-3px);
}

.page-about .about-pillar__no {
  font-family: var(--font-num);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--amber);
}

.page-about .about-pillar h3 {
  margin: 0;
  font-size: 19px;
  font-weight: 900;
  color: var(--cream);
}

.page-about .about-pillar p {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--steel);
}

.page-about .about-pillar__link {
  margin-top: auto;
  padding-top: 10px;
  font-size: 13px;
  text-decoration: none;
  color: var(--amber-lite);
  border-top: 1px dashed var(--line-dark);
}

.page-about .about-pillar__link:hover,
.page-about .about-pillar__link:focus-visible {
  color: var(--amber);
}

/* ---------- 团队与分工 ---------- */
.page-about .about-team__grid {
  display: grid;
  gap: 18px;
}

.page-about .about-team__figure {
  border: 3px solid var(--brown);
  box-shadow: var(--shadow-dark);
}

.page-about .about-team__roles {
  display: grid;
  gap: 12px;
}

.page-about .about-role {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px;
  background: var(--panel);
  border: 1px solid var(--line-dark);
  border-left: 3px solid var(--pitch);
  border-radius: var(--about-radius);
  transition: border-left-color .25s var(--ease), background-color .25s var(--ease);
}

.page-about .about-role:hover,
.page-about .about-role:focus-within {
  background: rgba(47, 158, 106, .12);
  border-left-color: var(--amber);
}

.page-about .about-role__count {
  font-family: var(--font-num);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--amber);
  letter-spacing: .02em;
}

.page-about .about-role h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 900;
  color: var(--cream);
}

.page-about .about-role p {
  margin: 0;
  font-size: 13px;
  line-height: 1.76;
  color: var(--steel);
}

.page-about .about-role__rhythm {
  margin: 0;
  padding: 14px 16px;
  font-size: 13px;
  line-height: 1.76;
  color: var(--amber-lite);
  background: rgba(242, 169, 59, .08);
  border: 1px dashed var(--line-amber);
  border-radius: var(--about-radius);
}

/* ---------- 覆盖与更新 ---------- */
.page-about .about-coverage__grid {
  display: grid;
  gap: 18px;
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-figure {
  padding: 16px 14px;
  background: var(--panel-2);
  border: 1px solid var(--line-dark);
  border-top: 3px solid var(--amber);
  border-radius: var(--about-radius);
  background-image: repeating-linear-gradient(180deg, rgba(143, 163, 168, .1) 0 1px, transparent 1px 9px);
  background-repeat: no-repeat;
  background-size: 100% 100%;
}

.page-about .about-figure__num {
  margin: 0;
  font-family: var(--font-num);
  font-size: 34px;
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: .01em;
  color: var(--amber);
}

.page-about .about-figure__label {
  margin: 6px 0 0;
  font-size: 13px;
  font-weight: 700;
  color: var(--cream);
}

.page-about .about-figure__desc {
  margin: 6px 0 0;
  font-size: 12px;
  line-height: 1.7;
  color: var(--steel);
}

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

.page-about .about-coverage__side .media-frame {
  border: 3px solid var(--brown);
  box-shadow: var(--shadow-dark);
}

.page-about .about-coverage__note {
  margin: 0;
  padding: 14px 16px;
  font-size: 13px;
  line-height: 1.76;
  color: var(--brown);
  background: var(--cream);
  border: 3px solid var(--brown);
  border-radius: var(--about-radius);
  box-shadow: var(--shadow-hard);
}

/* ---------- 本地共创 ---------- */
.page-about .about-local__grid {
  display: grid;
  gap: 18px;
}

.page-about .about-local__text {
  padding: 20px 18px;
  border: 3px solid var(--brown);
  border-radius: var(--about-radius);
  box-shadow: var(--shadow-hard);
}

.page-about .about-local__text p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.82;
  color: var(--brown);
}

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

.page-about .about-local__text a {
  color: var(--pitch-deep);
  font-weight: 700;
  text-decoration: none;
  border-bottom: 2px solid var(--amber);
}

.page-about .about-local__text a:hover,
.page-about .about-local__text a:focus-visible {
  color: var(--alert);
}

.page-about .about-local__figure {
  border: 3px solid var(--brown);
  box-shadow: var(--shadow-dark);
}

/* ---------- 出口块 ---------- */
.page-about .about-out {
  padding: 44px 0 56px;
  background:
    radial-gradient(90% 70% at 10% 0%, rgba(47, 158, 106, .2), transparent 65%),
    var(--ink);
}

.page-about .about-out__box {
  padding: 22px 18px;
  border: 3px solid var(--amber);
  border-radius: var(--about-radius);
  background: linear-gradient(150deg, rgba(242, 169, 59, .12), rgba(47, 158, 106, .1));
  box-shadow: var(--shadow-dark);
}

.page-about .about-out__head h2 {
  margin: 0;
  font-size: clamp(22px, 5vw, 32px);
  font-weight: 900;
  line-height: 1.2;
  color: var(--cream);
}

.page-about .about-out__head .index-line {
  color: var(--amber-lite);
}

.page-about .about-out__body {
  margin-top: 18px;
}

.page-about .about-contact {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-contact > div {
  display: grid;
  gap: 3px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--line-dark);
}

.page-about .about-contact dt {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--steel);
}

.page-about .about-contact dd {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--cream);
  word-break: break-word;
}

.page-about .about-out__tip {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.76;
  color: var(--steel);
}

.page-about .about-out__tip a {
  color: var(--amber-lite);
  text-decoration: none;
  border-bottom: 1px solid var(--line-amber);
}

.page-about .about-out__tip a:hover,
.page-about .about-out__tip a:focus-visible {
  color: var(--amber);
}

.page-about .about-out__actions {
  margin-top: 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-out__actions .btn {
  text-decoration: none;
}

/* ---------- 图片通例 ---------- */
.page-about img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-timeline__list {
    grid-auto-columns: 58%;
  }

  .page-about .about-contact > div {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 12px;
    align-items: baseline;
  }
}

@media (min-width: 860px) {
  .page-about .section {
    padding: 56px 0;
  }

  .page-about .about-hero {
    padding: 48px 0 56px;
  }

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

  .page-about .about-brand__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-timeline__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    grid-auto-flow: row;
    grid-auto-columns: auto;
    overflow: visible;
    padding-bottom: 0;
  }

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

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
    align-items: start;
  }

  .page-about .about-coverage__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-about .about-local__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-about .about-out__box {
    padding: 30px 28px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-pillars__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-hero__lede {
    font-size: 17px;
  }
}