/* ===== 中文专区简介 · 页面专属样式 ===== */
.page-about {
  --about-block-pad: clamp(52px, 7.5vw, 104px);
  --about-gap: clamp(28px, 4vw, 64px);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin-bottom: clamp(24px, 4vw, 48px);
}
.page-about .about-crumb a {
  color: var(--blue-soft);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--t-fast) var(--ease), color var(--t-fast) var(--ease);
}
.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(28px, 4vw, 56px) 0 clamp(48px, 7vw, 96px);
  border-bottom: 2px solid var(--rail-line);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(47, 107, 255, .16), transparent 58%),
    linear-gradient(180deg, var(--ink-2) 0%, var(--ink) 78%);
}
.page-about .about-hero__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}
.page-about .about-hero__title {
  font-family: var(--narrow);
  font-weight: 900;
  font-size: clamp(34px, 6.2vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  margin: 14px 0 20px;
  color: var(--text);
  text-wrap: balance;
}
.page-about .about-hero__lead {
  max-width: 60ch;
  margin: 0 0 28px;
}
.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
.page-about .about-hero__note {
  margin: 16px 0 0;
}

.page-about .about-hero__side {
  position: relative;
  padding-left: 34px;
}
.page-about .about-hero__years {
  position: absolute;
  left: 0;
  top: 2px;
  color: var(--cyan);
  font-family: var(--mono);
}

/* 数据小格 */
.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  margin: 0;
  padding: 2px;
  background: var(--rail-line);
  border: 2px solid var(--rail-line);
}
.page-about .about-facts__item {
  background: var(--ink-2);
  padding: 16px 14px;
  transition: background var(--t-mid) var(--ease);
}
.page-about .about-facts__item:hover {
  background: var(--indigo);
}
.page-about .about-facts__num {
  display: block;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
  margin-bottom: 6px;
}
.page-about .about-facts__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 通用区块 ---------- */
.page-about .about-block {
  padding: var(--about-block-pad) 0;
  border-bottom: 2px solid var(--rail-line);
}
.page-about .about-block h2,
.page-about .about-groups h2,
.page-about .about-terms h2,
.page-about .about-collect h2 {
  font-family: var(--narrow);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 10px 0 18px;
  color: var(--text);
  text-wrap: balance;
}

/* ---------- 缘起与定位 ---------- */
.page-about .about-origin__note {
  position: relative;
  min-height: 120px;
}
.page-about .about-origin__tag {
  color: var(--muted);
  font-family: var(--mono);
  writing-mode: vertical-rl;
  position: absolute;
  left: 0;
  top: 0;
}
.page-about .about-origin__body {
  border-left: 2px solid var(--rail-line);
  padding-left: clamp(18px, 3vw, 40px);
}
.page-about .about-origin__body .prose p:first-child {
  font-size: 1.06em;
  color: var(--text);
}

/* ---------- 索引体系演进 ---------- */
.page-about .about-evolution__head {
  max-width: 68ch;
  margin-bottom: clamp(24px, 4vw, 44px);
}
.page-about .about-evolution__intro {
  color: var(--muted);
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
}
.page-about .about-evolution__media {
  margin-bottom: clamp(32px, 5vw, 64px);
}

/* 时间线 */
.page-about .about-tl {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}
.page-about .about-tl__node {
  position: relative;
  padding: 0 0 34px 30px;
  border-left: 2px solid var(--rail-line);
  transition: border-color var(--t-mid) var(--ease);
}
.page-about .about-tl__node::before {
  content: "";
  position: absolute;
  left: -8px;
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 3px var(--ink);
  transition: background var(--t-mid) var(--ease), box-shadow var(--t-mid) var(--ease);
}
.page-about .about-tl__node:last-child {
  padding-bottom: 0;
}
.page-about .about-tl__node:hover {
  border-left-color: var(--cyan);
}
.page-about .about-tl__node:hover::before {
  background: var(--cyan);
  box-shadow: 0 0 0 3px var(--ink), 0 0 0 7px rgba(41, 242, 220, .18);
}
.page-about .about-tl__ver {
  display: inline-block;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cyan);
  border: 1px solid var(--rail-line-2);
  padding: 3px 9px;
  margin-bottom: 12px;
}
.page-about .about-tl__title {
  font-family: var(--narrow);
  font-weight: 800;
  font-size: clamp(19px, 2.2vw, 25px);
  line-height: 1.25;
  margin: 0 0 10px;
  color: var(--text);
}
.page-about .about-tl__text {
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
}
.page-about .about-tl__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 7px;
}
.page-about .about-tl__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--blue-soft);
}
.page-about .about-tl__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 2px;
  background: var(--cyan);
}

/* ---------- 团队 ---------- */
.page-about .about-team__layout {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
  margin-bottom: clamp(32px, 5vw, 64px);
}
.page-about .about-roles {
  display: grid;
  gap: 14px;
}

.page-about .about-role {
  border: 2px solid var(--rail-line);
  background: linear-gradient(180deg, var(--ink-2), rgba(6, 10, 22, .9));
  box-shadow: 6px 6px 0 rgba(0, 0, 0, .45);
  transition: transform var(--t-mid) var(--ease), border-color var(--t-mid) var(--ease);
}
.page-about .about-role[open] {
  border-color: var(--rail-line-2);
}
.page-about .about-role:hover {
  border-color: var(--cyan);
  transform: translate(-2px, -2px);
}
.page-about .about-role__head {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}
.page-about .about-role__head::-webkit-details-marker {
  display: none;
}
.page-about .about-role__head:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}
.page-about .about-role__num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}
.page-about .about-role__name {
  flex: 1;
  font-family: var(--narrow);
  font-weight: 800;
  font-size: 18px;
  color: var(--text);
}
.page-about .about-role__mark {
  font-family: var(--mono);
  font-size: 18px;
  color: var(--blue-soft);
  transition: transform var(--t-mid) var(--ease), color var(--t-mid) var(--ease);
}
.page-about .about-role[open] .about-role__mark {
  transform: rotate(45deg);
  color: var(--orange);
}
.page-about .about-role__body {
  padding: 0 18px 18px 18px;
  border-top: 1px dashed var(--rail-line);
  margin-top: 0;
  padding-top: 14px;
}
.page-about .about-role__body p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}
.page-about .about-role__meta {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--orange-soft);
  margin: 0;
}

/* ---------- 七组索引 ---------- */
.page-about .about-groups {
  padding: var(--about-block-pad) 0;
  border-bottom: 2px solid var(--rail-line);
}
.page-about .about-groups__layout {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}
.page-about .about-groups__link {
  display: inline-block;
  margin-top: 20px;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--blue-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--rail-line-2);
  padding-bottom: 4px;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.page-about .about-groups__link:hover,
.page-about .about-groups__link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .about-group__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .about-group__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 16px 18px;
  border: 2px solid var(--rail-line);
  background: linear-gradient(180deg, rgba(6, 10, 22, .55), rgba(6, 10, 22, .85));
  box-shadow: 5px 5px 0 rgba(0, 0, 0, .4);
  transition: transform var(--t-mid) var(--ease), border-color var(--t-mid) var(--ease), box-shadow var(--t-mid) var(--ease);
}
.page-about .about-group__item:hover {
  transform: translate(-2px, -2px);
  border-color: var(--cyan);
  box-shadow: 7px 7px 0 rgba(41, 242, 220, .16);
}
.page-about .about-group__num {
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
  padding-top: 4px;
}
.page-about .about-group__item:hover .about-group__num {
  color: var(--orange);
}
.page-about .about-group__name {
  font-family: var(--narrow);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.3;
  margin: 0 0 5px;
  color: var(--text);
}
.page-about .about-group__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 收藏与回访 ---------- */
.page-about .about-collect__panel {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
  border: 2px solid var(--orange);
  background:
    linear-gradient(180deg, rgba(255, 139, 61, .07), transparent 62%),
    linear-gradient(180deg, var(--ink-2), var(--ink));
  box-shadow: 8px 8px 0 rgba(255, 139, 61, .14);
  padding: clamp(24px, 3.6vw, 48px);
}
.page-about .about-collect__eyebrow {
  color: var(--orange) !important;
}
.page-about .about-collect__btn {
  margin-top: 22px;
}
.page-about .about-collect__note {
  margin: 14px 0 0;
}

.page-about .about-return {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .about-return__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  padding: 14px 16px;
  border: 2px solid var(--rail-line);
  background: rgba(6, 10, 22, .6);
  transition: border-color var(--t-mid) var(--ease), transform var(--t-mid) var(--ease);
}
.page-about .about-return__item:hover {
  border-color: var(--orange);
  transform: translateX(4px);
}
.page-about .about-return__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border: 2px solid var(--orange);
  color: var(--orange-soft);
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1;
}
.page-about .about-return__name {
  font-family: var(--narrow);
  font-weight: 800;
  font-size: 16px;
  margin: 0 0 4px;
  color: var(--text);
}
.page-about .about-return__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 术语与校对 ---------- */
.page-about .about-terms {
  padding: var(--about-block-pad) 0;
  border-bottom: 2px solid var(--rail-line);
}
.page-about .about-terms__layout {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
}
.page-about .about-terms__stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 2px;
  margin: 26px 0 0;
  padding: 2px;
  background: var(--rail-line);
  border: 2px solid var(--rail-line);
}
.page-about .about-terms__stat {
  background: var(--ink-2);
  padding: 14px 12px;
  margin: 0;
}
.page-about .about-terms__stat-num {
  display: block;
  font-family: var(--mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(18px, 2.2vw, 24px);
  color: var(--cyan);
  margin-bottom: 5px;
}
.page-about .about-terms__stat-label {
  margin: 0;
  font-size: 12px;
  line-height: 1.5;
  color: var(--muted);
}

/* ---------- 服务范围 ---------- */
.page-about .about-scope__head {
  max-width: 62ch;
  margin-bottom: clamp(24px, 4vw, 44px);
}
.page-about .about-scope__intro {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
}
.page-about .about-scope__grid {
  display: grid;
  gap: 16px;
  margin-bottom: clamp(28px, 4vw, 48px);
}
.page-about .about-scope__card {
  padding: 22px 22px 24px;
  border: 2px solid var(--rail-line);
  background: linear-gradient(180deg, var(--ink-2), rgba(6, 10, 22, .9));
  box-shadow: 6px 6px 0 rgba(0, 0, 0, .42);
  transition: transform var(--t-mid) var(--ease), border-color var(--t-mid) var(--ease);
}
.page-about .about-scope__card:hover {
  border-color: var(--blue);
  transform: translate(-2px, -2px);
}
.page-about .about-scope__card h3 {
  font-family: var(--narrow);
  font-weight: 800;
  font-size: 18px;
  margin: 0 0 10px;
  color: var(--text);
}
.page-about .about-scope__card h3::before {
  content: "";
  display: block;
  width: 28px;
  height: 3px;
  background: var(--blue);
  margin-bottom: 12px;
}
.page-about .about-scope__card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-about .about-scope__env {
  border-top: 2px solid var(--rail-line);
  padding-top: 24px;
}
.page-about .about-scope__env-title {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
  margin: 0 0 14px;
}
.page-about .about-scope__env-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-about .about-scope__env-list li {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--rail-line);
}
.page-about .about-scope__env-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}
.page-about .about-scope__env-list .mono {
  min-width: 68px;
  color: var(--blue-soft);
  font-size: 12px;
  letter-spacing: 0.1em;
  padding-top: 2px;
}

/* ---------- 收束 ---------- */
.page-about .about-outro {
  padding: clamp(48px, 7vw, 96px) 0 clamp(56px, 8vw, 112px);
  background: radial-gradient(90% 120% at 12% 0%, rgba(41, 242, 220, .08), transparent 62%);
}
.page-about .about-outro__line {
  max-width: 46ch;
  margin: 0 auto;
  text-align: center;
  font-family: var(--narrow);
  font-weight: 800;
  font-size: clamp(18px, 2.4vw, 26px);
  line-height: 1.6;
  letter-spacing: -0.005em;
  color: var(--text);
}
.page-about .about-outro__links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px 28px;
  margin-top: 30px;
}
.page-about .about-outro__links a {
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--blue-soft);
  text-decoration: none;
  border-bottom: 1px solid var(--rail-line-2);
  padding-bottom: 4px;
  transition: color var(--t-fast) var(--ease), border-color var(--t-fast) var(--ease);
}
.page-about .about-outro__links a:hover,
.page-about .about-outro__links a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

/* ---------- 响应式 ---------- */
@media (max-width: 599px) {
  .page-about .about-hero__side {
    padding-left: 0;
    padding-top: 30px;
  }
  .page-about .about-hero__years {
    position: static;
    writing-mode: horizontal-tb;
    display: block;
    margin-bottom: 14px;
  }
  .page-about .about-origin__body {
    border-left: 0;
    padding-left: 0;
    border-top: 2px solid var(--rail-line);
    padding-top: 20px;
  }
  .page-about .about-origin__note {
    min-height: 0;
  }
  .page-about .about-origin__tag {
    position: static;
    writing-mode: horizontal-tb;
  }
  .page-about .about-terms__stats {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 600px) {
  .page-about .about-scope__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-about .about-tl {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .about-tl__node,
  .page-about .about-tl__node:last-child {
    border-left: 0;
    border-top: 2px solid var(--rail-line);
    padding: 32px 28px 0 0;
  }
  .page-about .about-tl__node::before {
    left: 0;
    top: -8px;
  }
  .page-about .about-tl__node + .about-tl__node {
    border-left: 2px solid var(--rail-line);
    padding-left: 28px;
  }
  .page-about .about-tl__node + .about-tl__node::before {
    left: 28px;
  }
  .page-about .about-tl__node:hover {
    border-left-color: var(--rail-line);
  }
  .page-about .about-tl__node + .about-tl__node:hover {
    border-left-color: var(--cyan);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(32px, 5vw, 72px);
  }
  .page-about .about-team__layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
  .page-about .about-groups__layout {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  }
  .page-about .about-terms__layout {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }
  .page-about .about-collect__panel {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
  .page-about .about-group__item:nth-child(even) {
    margin-left: 34px;
  }
}

@media (min-width: 1080px) {
  .page-about .about-roles {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }
  .page-about .about-role {
    grid-column: span 6;
  }
  .page-about .about-role--wide {
    grid-column: span 7;
  }
  .page-about .about-role--narrow {
    grid-column: span 5;
  }
  .page-about .about-scope__card--offset {
    transform: translateY(22px);
  }
  .page-about .about-scope__card--offset:hover {
    transform: translate(-2px, 20px);
  }
}
<<<END>>>