.page-about {
  --about-gap: 26px;
  --about-radius: 4px;
  --about-panel-bg: linear-gradient(180deg, rgba(21, 23, 27, 0.96), rgba(11, 12, 14, 0.96));
  --about-soft: rgba(243, 235, 221, 0.68);
  position: relative;
  overflow-x: clip;
  background:
    radial-gradient(900px 460px at 82% -10%, rgba(201, 164, 92, 0.16), transparent 68%),
    var(--ink);
  color: var(--cream);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: 22px 0 44px;
  border-bottom: 1px solid var(--rule);
}
.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold), transparent);
  opacity: 0.5;
}
.page-about .breadcrumb {
  margin-bottom: 26px;
  font-size: 13px;
  color: var(--about-soft);
}
.page-about .breadcrumb a {
  color: var(--about-soft);
  text-decoration: none;
}
.page-about .breadcrumb a:hover {
  color: var(--gold-lt);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-hero__lead .eyebrow {
  margin: 0 0 14px;
}

.page-about h1 {
  margin: 0 0 18px;
  font-size: clamp(32px, 7.4vw, 62px);
  line-height: 1.08;
  font-weight: 900;
  letter-spacing: 0.03em;
  color: var(--cream);
}

.page-about .about-hero__intro {
  margin: 0 0 26px;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--about-soft);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.page-about .about-hero__stats li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 16px 12px 14px;
  background: var(--ink-2);
}
.page-about .about-num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 7vw, 44px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--gold);
}
.page-about .about-stat__unit {
  font-size: 12px;
  color: var(--gold-lt);
  letter-spacing: 0.16em;
}
.page-about .about-stat__label {
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.5;
  color: var(--about-soft);
}

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

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--rule-strong);
  overflow: hidden;
  background: var(--ink-2);
}
.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 260px;
  max-height: 460px;
  object-fit: cover;
}
.page-about .about-hero__media figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: 14px 16px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--cream);
  background: linear-gradient(180deg, transparent, rgba(11, 12, 14, 0.92) 42%);
}

/* ---------- 主体：索引 + 面板 ---------- */
.page-about .about-body {
  padding-top: 34px;
  padding-bottom: 60px;
}
.page-about .about-body__grid {
  display: grid;
  gap: var(--about-gap);
}

.page-about .about-rail {
  position: sticky;
  top: calc(var(--header-h) + 6px);
  z-index: 3;
  padding: 8px 0 10px;
  background: linear-gradient(180deg, var(--ink) 78%, rgba(11, 12, 14, 0));
}
.page-about .about-rail__title {
  display: none;
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--gold);
  text-transform: uppercase;
}
.page-about .about-rail__list {
  display: flex;
  gap: 8px;
  margin: 0;
  padding: 0 0 4px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}
.page-about .about-rail__list::-webkit-scrollbar {
  display: none;
}
.page-about .about-rail__link {
  display: block;
  padding: 8px 14px;
  white-space: nowrap;
  font-size: 13px;
  color: var(--about-soft);
  text-decoration: none;
  border: 1px solid var(--rule);
  background: rgba(21, 23, 27, 0.8);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.page-about .about-rail__link:hover {
  color: var(--cream);
  border-color: var(--rule-strong);
}
.page-about .about-rail__link[aria-current="true"] {
  color: var(--ink);
  background: var(--gold);
  border-color: var(--gold);
}

.page-about .about-panels {
  display: grid;
  gap: var(--about-gap);
  min-width: 0;
}

.page-about .about-panel {
  position: relative;
  padding: clamp(20px, 3.4vw, 36px);
  background: var(--about-panel-bg);
  border: 1px solid var(--rule);
  scroll-margin-top: calc(var(--header-h) + 78px);
}
.page-about .about-panel::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 46px;
  height: 3px;
  background: var(--gold);
}
.page-about .about-panel h2 {
  margin: 0 0 14px;
  font-size: clamp(23px, 4.4vw, 34px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--cream);
}
.page-about .about-panel .eyebrow {
  margin: 0 0 12px;
}
.page-about .about-lead {
  margin: 0 0 26px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--about-soft);
}

/* ---------- 图片块 ---------- */
.page-about .about-banner,
.page-about .about-square {
  margin: 0 0 26px;
  border: 1px solid var(--rule);
  overflow: hidden;
  background: var(--ink-2);
}
.page-about .about-banner img,
.page-about .about-square img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}
.page-about .about-banner img {
  aspect-ratio: 3 / 2;
}
.page-about .about-square img {
  aspect-ratio: 1 / 1;
}
.page-about .about-banner:hover img,
.page-about .about-square:hover img {
  transform: scale(1.02);
}
.page-about .about-banner figcaption,
.page-about .about-square figcaption {
  padding: 12px 14px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--about-soft);
  border-top: 1px solid var(--rule);
}

/* ---------- 角色卡 ---------- */
.page-about .about-roles .accordion__item {
  border: 1px solid var(--rule);
  background: rgba(36, 40, 48, 0.5);
  margin-bottom: 10px;
}
.page-about .about-roles .accordion__item:last-child {
  margin-bottom: 0;
}
.page-about .about-role__trigger {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  width: 100%;
  text-align: left;
}
.page-about .about-role__trigger .accordion__index {
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
}
.page-about .about-role__name {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--cream);
}
.page-about .about-role__hint {
  flex: 1 1 160px;
  font-size: 12px;
  color: var(--about-soft);
}
.page-about .about-role__handoff {
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px dashed var(--rule);
  font-size: 14px;
  color: var(--gold-lt);
}
.page-about .about-roles .accordion__item[data-open="true"] {
  border-color: rgba(201, 164, 92, 0.55);
  background: rgba(36, 40, 48, 0.86);
}
.page-about .about-roles .accordion__panel-inner {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--about-soft);
}
.page-about .about-roles .accordion__panel-inner p {
  margin: 0 0 12px;
}

/* ---------- 覆盖地图 ---------- */
.page-about .about-map {
  display: grid;
  gap: 22px;
}
.page-about .about-map__canvas {
  position: relative;
  padding: 10px;
  border: 1px solid var(--rule);
  background: radial-gradient(120% 100% at 30% 10%, rgba(127, 167, 154, 0.14), transparent 70%),
    var(--ink-2);
}
.page-about .about-map__canvas svg {
  display: block;
  width: 100%;
  height: auto;
}
.page-about .about-map__shape {
  fill: rgba(201, 164, 92, 0.09);
  stroke: rgba(201, 164, 92, 0.5);
  stroke-width: 1.4;
  stroke-linejoin: round;
}
.page-about .about-map__dot {
  fill: var(--celadon);
  transition: fill 0.2s var(--ease), r 0.2s var(--ease);
  cursor: help;
}
.page-about .about-map__dot:hover {
  fill: var(--gold-lt);
}
.page-about .about-map__dot--hub {
  fill: var(--cinnabar);
}
.page-about .about-map__dot--hub:hover {
  fill: var(--gold);
}

.page-about .about-map__legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 10px;
  padding: 12px 14px;
  font-size: 12px;
  color: var(--cream);
  border: 1px solid rgba(201, 164, 92, 0.28);
  background: rgba(201, 164, 92, 0.14);
  backdrop-filter: blur(6px);
}
.page-about .about-map__legend-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.page-about .about-map__swatch {
  width: 10px;
  height: 10px;
  display: inline-block;
}
.page-about .about-map__swatch--hub {
  background: var(--cinnabar);
}
.page-about .about-map__swatch--city {
  background: var(--celadon);
  border-radius: 50%;
}
.page-about .about-map__swatch--line {
  background: rgba(201, 164, 92, 0.5);
  height: 2px;
  width: 16px;
}

.page-about .about-map__list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.page-about .about-map__list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 10px 12px;
  background: var(--ink-2);
}
.page-about .about-map__city {
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--cream);
}
.page-about .about-map__list .tag {
  font-size: 11px;
  white-space: nowrap;
}

/* ---------- 四道关 ---------- */
.page-about .about-gates {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.page-about .about-gate {
  position: relative;
  padding: 20px 18px 22px;
  background: var(--ink-2);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%);
}
.page-about .about-gate__no {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1;
  color: rgba(201, 164, 92, 0.55);
}
.page-about .about-gate h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--cream);
}
.page-about .about-gate p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--about-soft);
}

/* ---------- 时间线 ---------- */
.page-about .about-panel--time {
  background:
    linear-gradient(180deg, rgba(21, 23, 27, 0.98), rgba(11, 12, 14, 0.98)),
    var(--ink);
}
.page-about .about-tl {
  position: relative;
  padding-left: 18px;
}
.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--gold), rgba(201, 164, 92, 0.12));
}
.page-about .about-tl__item {
  position: relative;
  margin-bottom: 10px;
  border: 1px solid var(--rule);
  background: rgba(36, 40, 48, 0.42);
}
.page-about .about-tl__item::before {
  content: "";
  position: absolute;
  left: -17px;
  top: 22px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 3px rgba(201, 164, 92, 0.18);
}
.page-about .about-tl__item[data-open="true"] {
  border-color: rgba(201, 164, 92, 0.55);
  background: rgba(36, 40, 48, 0.8);
}
.page-about .about-tl__trigger {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  width: 100%;
  text-align: left;
}
.page-about .about-tl__year {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold);
}
.page-about .about-tl__name {
  flex: 1 1 150px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--cream);
}
.page-about .about-tl .accordion__panel-inner {
  font-size: 14px;
  line-height: 1.85;
  color: var(--about-soft);
}
.page-about .about-tl .accordion__panel-inner p {
  margin: 0;
}

/* ---------- 服务标准 ---------- */
.page-about .about-standards {
  display: grid;
  gap: 24px;
}
.page-about .about-std-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--rule);
}
.page-about .about-std-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 4px 14px 0;
  background: var(--ink-2);
}
.page-about .about-std-list__k {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--celadon);
  padding-top: 3px;
}
.page-about .about-std-list h3 {
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--cream);
}
.page-about .about-std-list p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--about-soft);
}
.page-about .about-square {
  margin: 0;
}

/* ---------- 社区协作 ---------- */
.page-about .about-coop {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-coop li {
  padding: 18px 18px 20px;
  border-left: 2px solid var(--celadon);
  background: linear-gradient(90deg, rgba(127, 167, 154, 0.1), transparent 70%);
}
.page-about .about-coop h3 {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--cream);
}
.page-about .about-coop p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--about-soft);
}

/* ---------- 账号中枢 ---------- */
.page-about .about-panel--account {
  background:
    radial-gradient(120% 120% at 100% 0%, rgba(201, 164, 92, 0.16), transparent 62%),
    var(--about-panel-bg);
}
.page-about .about-account {
  display: grid;
  gap: 12px;
  margin-bottom: 24px;
}
.page-about .about-account__card {
  padding: 18px;
  border: 1px solid var(--rule);
  background: rgba(11, 12, 14, 0.6);
}
.page-about .about-account__no {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--ink);
  background: var(--gold);
  padding: 2px 8px;
}
.page-about .about-account__card h3 {
  margin: 0 0 8px;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--cream);
}
.page-about .about-account__card p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--about-soft);
}

.page-about .about-account__links {
  display: grid;
  gap: 1px;
  background: var(--rule);
  border: 1px solid var(--rule);
}
.page-about .about-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 16px;
  background: var(--ink-2);
  font-size: 14px;
  color: var(--cream);
  text-decoration: none;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}
.page-about .about-link span {
  color: var(--gold);
}
.page-about .about-link:hover {
  background: rgba(36, 40, 48, 0.95);
  color: var(--gold-lt);
}

/* ---------- 结尾行动 ---------- */
.page-about .about-cta {
  display: grid;
  gap: 18px;
  padding: clamp(22px, 3.4vw, 34px);
  border: 1px solid rgba(201, 164, 92, 0.42);
  background:
    linear-gradient(120deg, rgba(201, 164, 92, 0.16), rgba(185, 58, 50, 0.08) 65%, transparent),
    var(--ink-2);
}
.page-about .about-cta h2 {
  margin: 0 0 10px;
  font-size: clamp(21px, 4vw, 28px);
  font-weight: 800;
  letter-spacing: 0.04em;
  color: var(--cream);
}
.page-about .about-cta p {
  margin: 0;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-soft);
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-about .about-map__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-gates {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-account {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-coop {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding-top: 30px;
  }
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.32fr) minmax(0, 0.68fr);
    gap: 40px;
    align-items: stretch;
  }
  .page-about .about-hero__media img {
    min-height: 100%;
    max-height: none;
  }
  .page-about .about-body__grid {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 34px;
    align-items: start;
  }
  .page-about .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 22px);
    padding: 0;
    background: none;
  }
  .page-about .about-rail__title {
    display: block;
  }
  .page-about .about-rail__list {
    display: grid;
    gap: 0;
    overflow: visible;
    padding: 0;
    border-top: 1px solid var(--rule);
  }
  .page-about .about-rail__link {
    padding: 11px 12px 11px 14px;
    border: 0;
    border-left: 2px solid transparent;
    border-bottom: 1px solid var(--rule);
    background: none;
    white-space: normal;
    font-size: 13.5px;
  }
  .page-about .about-rail__link:hover {
    border-color: transparent;
    border-left-color: var(--rule-strong);
  }
  .page-about .about-rail__link[aria-current="true"] {
    color: var(--cream);
    background: rgba(201, 164, 92, 0.12);
    border-left-color: var(--gold);
  }
  .page-about .about-standards {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    align-items: start;
    gap: 26px;
  }
  .page-about .about-map {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 24px;
  }
  .page-about .about-map__list {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 1100px) {
  .page-about .about-gates {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-map__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-banner img,
  .page-about .about-square img,
  .page-about .about-rail__link,
  .page-about .about-link {
    transition: none;
  }
  .page-about .about-banner:hover img,
  .page-about .about-square:hover img {
    transform: none;
  }
}