.page-about {
  --about-pad: clamp(18px, 4vw, 54px);
  --about-gap: clamp(30px, 4.4vw, 58px);
  background: var(--ink);
  color: var(--ivory);
  font-family: var(--sans);
}
.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

/* 面包屑 */
.page-about .about-crumb-row {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 20px var(--about-pad) 0;
}
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--slate);
}
.page-about .breadcrumb a {
  color: var(--champagne);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* 首屏框景 */
.page-about .about-hero {
  padding: 22px var(--about-pad) clamp(30px, 4.5vw, 56px);
}
.page-about .about-hero__frame {
  position: relative;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(20px, 3.2vw, 44px);
  border: 1px solid var(--line);
  background:
    linear-gradient(155deg, rgba(28, 68, 55, 0.62) 0%, rgba(10, 32, 24, 0.94) 64%),
    var(--ink-deep);
}
.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  inset: 7px;
  border: 1px solid rgba(201, 162, 39, 0.14);
  pointer-events: none;
}
.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: 26px;
}
.page-about .about-eyebrow {
  margin: 0 0 18px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
}
.page-about .about-hero__title {
  margin: 0 0 20px;
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(30px, 6.4vw, 64px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ivory);
}
.page-about .about-hero__lead {
  margin: 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.9;
  color: rgba(245, 240, 230, 0.8);
}

/* 首屏数字刻度 */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(24px, 3vw, 34px);
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.page-about .about-stats__cell {
  background: rgba(10, 32, 24, 0.88);
  padding: 14px 12px;
}
.page-about .about-stats__num {
  display: block;
  font-family: var(--mono);
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1;
  color: var(--gold);
}
.page-about .about-stats__label {
  display: block;
  margin-top: 8px;
  font-size: 11.5px;
  line-height: 1.5;
  letter-spacing: 0.1em;
  color: var(--slate-lift);
}

/* 图像容器 */
.page-about .about-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-deep);
  overflow: hidden;
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-figure__cap {
  padding: 9px 12px;
  border-top: 1px solid var(--line-soft);
  background: rgba(10, 32, 24, 0.72);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--slate-lift);
}
.page-about .about-figure--paper {
  margin-top: 26px;
  border-color: rgba(176, 110, 44, 0.5);
}
.page-about .about-figure--paper .about-figure__cap {
  background: rgba(245, 240, 230, 0.6);
  border-top-color: rgba(19, 36, 30, 0.16);
  color: rgba(19, 36, 30, 0.66);
}

/* 正文骨架 */
.page-about .about-body {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(28px, 4.6vw, 62px) var(--about-pad) 0;
}

/* 章节索引 */
.page-about .about-index {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}
.page-about .about-index__title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--gold);
}
.page-about .about-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 5px 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--slate-lift);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.page-about .about-index__num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--copper-lift);
}
.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--line-strong);
}
.page-about .about-top {
  display: inline-block;
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--champagne);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 3px;
}
.page-about .about-top:hover,
.page-about .about-top:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* 章节通用 */
.page-about .about-sec {
  scroll-margin-top: calc(var(--bar) + 18px);
  padding-bottom: var(--about-gap);
}
.page-about .about-sec:last-child {
  padding-bottom: 0;
}
.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.page-about .about-sec__idx {
  flex: none;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.18em;
  color: var(--gold);
}
.page-about .about-sec h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(21px, 3.2vw, 31px);
  line-height: 1.35;
  letter-spacing: 0.01em;
  color: var(--ivory);
}
.page-about .about-sec p {
  margin: 0 0 14px;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.95;
  color: rgba(245, 240, 230, 0.82);
}
.page-about .about-sec h3 {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 18px;
  line-height: 1.4;
  color: var(--ivory);
}

/* 定位与旁注 */
.page-about .about-split {
  display: grid;
  gap: 20px;
  margin-top: 22px;
}
.page-about .about-note {
  border-left: 2px solid var(--gold);
  background: rgba(28, 68, 55, 0.44);
  padding: 16px 18px;
}
.page-about .about-note__title {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--champagne);
}
.page-about .about-note__list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-note__list li {
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
  line-height: 1.7;
}
.page-about .about-note__list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-about .about-note__list a {
  color: rgba(245, 240, 230, 0.9);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color 0.25s var(--ease);
}
.page-about .about-note__list a:hover,
.page-about .about-note__list a:focus-visible {
  color: var(--gold);
}

/* 三个内容支柱 */
.page-about .about-pillars {
  display: grid;
  gap: 0;
  margin-top: 8px;
}
.page-about .about-pillar {
  padding: 18px 0;
  border-top: 1px solid var(--line);
}
.page-about .about-pillar__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--copper-lift);
}
.page-about .about-pillar:nth-child(2) .about-pillar__num {
  color: var(--slate-lift);
}
.page-about .about-pillar:nth-child(3) .about-pillar__num {
  color: var(--gold);
}
.page-about .about-pillar p {
  margin-bottom: 10px;
  font-size: 14.5px;
  line-height: 1.85;
}
.page-about .about-link {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 3px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--champagne);
  border-bottom-color: var(--champagne);
}

/* 演进时间轴 */
.page-about .about-timeline {
  display: grid;
  gap: 0;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-stage {
  position: relative;
  padding: 0 0 22px 22px;
  border-left: 1px solid var(--line);
}
.page-about .about-stage:last-child {
  padding-bottom: 0;
}
.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border: 1px solid var(--gold);
  border-radius: 50%;
  background: var(--ink);
}
.page-about .about-stage__ver {
  display: block;
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--gold);
}
.page-about .about-stage h3 {
  font-size: 17px;
}
.page-about .about-stage p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
}

/* 团队浅色档案页 */
.page-about .about-sec--band .about-sec__idx {
  color: var(--copper);
}
.page-about .about-band {
  padding: clamp(20px, 3.4vw, 40px);
  border: 1px solid rgba(201, 162, 39, 0.5);
  background: var(--paper);
  color: var(--text-dark);
}
.page-about .about-band .about-sec__head {
  border-top-color: rgba(19, 36, 30, 0.18);
}
.page-about .about-band h2 {
  color: var(--text-dark);
}
.page-about .about-band h3 {
  color: var(--text-dark);
}
.page-about .about-band p {
  color: rgba(19, 36, 30, 0.78);
}
.page-about .about-team {
  display: grid;
  gap: 18px;
  margin-top: 24px;
}
.page-about .about-team__item {
  padding-top: 14px;
  border-top: 2px solid var(--gold);
}
.page-about .about-team__item:nth-child(2) {
  border-top-color: var(--copper);
}
.page-about .about-team__item:nth-child(3) {
  border-top-color: var(--slate);
}
.page-about .about-team__label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--copper);
}
.page-about .about-team__item h3 {
  margin: 0 0 8px;
  font-size: 17px;
}
.page-about .about-team__item p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.8;
}
.page-about .about-team__list {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-team__list li {
  position: relative;
  padding-left: 14px;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(19, 36, 30, 0.7);
}
.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 1px;
  background: var(--copper);
}

/* 复核步骤 */
.page-about .about-steps {
  display: grid;
  gap: 1px;
  margin: 24px 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.page-about .about-step {
  padding: 16px 16px 18px;
  background: var(--ink);
}
.page-about .about-step__num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--gold);
}
.page-about .about-step h3 {
  margin: 0 0 8px;
  font-size: 16px;
}
.page-about .about-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
}

/* 审计与改进 */
.page-about .about-audit {
  margin-top: 22px;
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  background: rgba(28, 68, 55, 0.36);
}
.page-about .about-audit__title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--champagne);
}
.page-about .about-audit__list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-audit__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(245, 240, 230, 0.82);
}
.page-about .about-audit__list li::before {
  content: "→";
  position: absolute;
  left: 0;
  font-family: var(--mono);
  color: var(--gold);
}

/* 收尾入口 */
.page-about .about-cta {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(30px, 4.6vw, 56px) var(--about-pad) clamp(40px, 6vw, 72px);
  border-top: 1px solid var(--line);
}
.page-about .about-cta h2 {
  margin: 0 0 20px;
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.35;
  color: var(--ivory);
}
.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-cta .btn {
  padding: 14px 22px;
  border-radius: 0;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-decoration: none;
}

/* 响应式 */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 780px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .about-pillars {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 30px;
  }
  .page-about .about-pillar {
    padding: 20px 0 0;
  }
}

@media (min-width: 860px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.78fr);
    align-items: start;
    gap: 26px;
  }
  .page-about .about-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 30px;
  }
  .page-about .about-stage {
    padding: 24px 20px 0 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }
  .page-about .about-stage::before {
    left: 0;
    top: -5px;
  }
  .page-about .about-stage:last-child {
    padding-right: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    align-items: end;
    gap: 38px;
  }
}

@media (min-width: 980px) {
  .page-about .about-body {
    grid-template-columns: 210px minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-index {
    position: sticky;
    top: calc(var(--bar) + 24px);
    padding-top: 18px;
  }
  .page-about .about-index__list {
    display: grid;
    gap: 2px;
  }
  .page-about .about-index__link {
    width: 100%;
    padding: 8px 0;
    border-bottom: 1px solid var(--line-soft);
  }
  .page-about .about-index__link:hover {
    border-bottom-color: var(--line-strong);
  }
}



.page-about {
  --about-pad: clamp(18px, 4vw, 54px);
  --about-gap: clamp(30px, 4.4vw, 58px);
  background: var(--ink);
  color: var(--ivory);
  font-family: var(--sans);
}
.page-about *,
.page-about *::before,
.page-about *::after {
  box-sizing: border-box;
}

/* 面包屑 */
.page-about .about-crumb-row {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 20px var(--about-pad) 0;
}
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.16em;
  color: var(--slate);
}
.page-about .breadcrumb a {
  color: var(--champagne);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* 首屏框景 */
.page-about .about-hero {
  padding: 22px var(--about-pad) clamp(30px, 4.5vw, 56px);
}
.page-about .about-hero__frame {
  position: relative;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(20px, 3.2vw, 44px);
  border: 1px solid var(--line);
  background:
    linear-gradient(155deg, rgba(28, 68, 55, 0.62) 0%, rgba(10, 32, 24, 0.94) 64%),
    var(--ink-deep);
}
.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  inset: 7px;
  border: 1px solid rgba(201, 162, 39, 0.14);
  pointer-events: none;
}
.page-about .about-hero__grid {
  position: relative;
  display: grid;
  gap: 26px;
}
.page-about .about-eyebrow {
  margin: 0 0 18px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold);
}
.page-about .about-hero__title {
  margin: 0 0 20px;
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(30px, 6.4vw, 64px);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--ivory);
}
.page-about .about-hero__lead {
  margin: 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.9;
  color: rgba(245, 240, 230, 0.8);
}

/* 首屏数字刻度 */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(24px, 3vw, 34px);
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.page-about .about-stats__cell {
  background: rgba(10, 32, 24, 0.88);
  padding: 14px 12px;
}
.page-about .about-stats__num {
  display: block;
  font-family: var(--mono);
  font-size: clamp(20px, 2.6vw, 28px);
  line-height: 1;
  color: var(--gold);
}
.page-about .about-stats__label {
  display: block;
  margin-top: 8px;
  font-size: 11.5px;
  line-height: 1.5;
  letter-spacing: 0.1em;
  color: var(--slate-lift);
}

/* 图像容器 */
.page-about .about-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--ink-deep);
  overflow: hidden;
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .about-figure__cap {
  padding: 9px 12px;
  border-top: 1px solid var(--line-soft);
  background: rgba(10, 32, 24, 0.72);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--slate-lift);
}
.page-about .about-figure--paper {
  margin-top: 26px;
  border-color: rgba(176, 110, 44, 0.5);
}
.page-about .about-figure--paper .about-figure__cap {
  background: rgba(245, 240, 230, 0.6);
  border-top-color: rgba(19, 36, 30, 0.16);
  color: rgba(19, 36, 30, 0.66);
}

/* 正文骨架 */
.page-about .about-body {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(28px, 4.6vw, 62px) var(--about-pad) 0;
}

/* 章节索引 */
.page-about .about-index {
  border-top: 1px solid var(--line);
  padding-top: 16px;
}
.page-about .about-index__title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--gold);
}
.page-about .about-index__list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 5px 0;
  font-size: 13px;
  line-height: 1.5;
  color: var(--slate-lift);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.page-about .about-index__num {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--copper-lift);
}
.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--line-strong);
}
.page-about .about-top {
  display: inline-block;
  margin-top: 18px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--champagne);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 3px;
}
.page-about .about-top:hover,
.page-about .about-top:focus-visible {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

/* 章节通用 */
.page-about .about-sec {
  scroll-margin-top: calc(var(--bar) + 18px);
  padding-bottom: var(--about-gap);
}
.page-about .about-sec:last-child {
  padding-bottom: 0;
}
.page-about .about-sec__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.page-about .about-sec__idx {
  flex: none;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.18em;
  color: var(--gold);
}
.page-about .about-sec h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(21px, 3.2vw, 31px);
  line-height: 1.35;
  letter-spacing: 0.01em;
  color: var(--ivory);
}
.page-about .about-sec p {
  margin: 0 0 14px;
  max-width: 66ch;
  font-size: 15.5px;
  line-height: 1.95;
  color: rgba(245, 240, 230, 0.82);
}
.page-about .about-sec h3 {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 18px;
  line-height: 1.4;
  color: var(--ivory);
}

/* 定位与旁注 */
.page-about .about-split {
  display: grid;
  gap: 20px;
  margin-top: 22px;
}
.page-about .about-note {
  border-left: 2px solid var(--gold);
  background: rgba(28, 68, 55, 0.44);
  padding: 16px 18px;
}
.page-about .about-note__title {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--champagne);
}
.page-about .about-note__list {
  display: grid;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-note__list li {
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
  line-height: 1.7;
}
.page-about .about-note__list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-about .about-note__list a {
  color: rgba(245, 240, 230, 0.9);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  transition: color 0.25s var(--ease);
}
.page-about .about-note__list a:hover,
.page-about .about-note__list a:focus-visible {
  color: var(--gold);
}

/* 三个内容支柱 */
.page-about .about-pillars {
  display: grid;
  gap: 0;
  margin-top: 8px;
}
.page-about .about-pillar {
  padding: 18px 0;
  border-top: 1px solid var(--line);
}
.page-about .about-pillar__num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--copper-lift);
}
.page-about .about-pillar:nth-child(2) .about-pillar__num {
  color: var(--slate-lift);
}
.page-about .about-pillar:nth-child(3) .about-pillar__num {
  color: var(--gold);
}
.page-about .about-pillar p {
  margin-bottom: 10px;
  font-size: 14.5px;
  line-height: 1.85;
}
.page-about .about-link {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--line-strong);
  padding-bottom: 3px;
  transition: color 0.25s var(--ease), border-color 0.25s var(--ease);
}
.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--champagne);
  border-bottom-color: var(--champagne);
}

/* 演进时间轴 */
.page-about .about-timeline {
  display: grid;
  gap: 0;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .about-stage {
  position: relative;
  padding: 0 0 22px 22px;
  border-left: 1px solid var(--line);
}
.page-about .about-stage:last-child {
  padding-bottom: 0;
}
.page-about .about-stage::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border: 1px solid var(--gold);
  border-radius: 50%;
  background: var(--ink);
}
.page-about .about-stage__ver {
  display: block;
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--gold);
}
.page-about .about-stage h3 {
  font-size: 17px;
}
.page-about .about-stage p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
}

/* 团队浅色档案页 */
.page-about .about-sec--band .about-sec__idx {
  color: var(--copper);
}
.page-about .about-band {
  padding: clamp(20px, 3.4vw, 40px);
  border: 1px solid rgba(201, 162, 39, 0.5);
  background: var(--paper);
  color: var(--text-dark);
}
.page-about .about-band .about-sec__head {
  border-top-color: rgba(19, 36, 30, 0.18);
}
.page-about .about-band h2 {
  color: var(--text-dark);
}
.page-about .about-band h3 {
  color: var(--text-dark);
}
.page-about .about-band p {
  color: rgba(19, 36, 30, 0.78);
}
.page-about .about-team {
  display: grid;
  gap: 18px;
  margin-top: 24px;
}
.page-about .about-team__item {
  padding-top: 14px;
  border-top: 2px solid var(--gold);
}
.page-about .about-team__item:nth-child(2) {
  border-top-color: var(--copper);
}
.page-about .about-team__item:nth-child(3) {
  border-top-color: var(--slate);
}
.page-about .about-team__label {
  display: block;
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.2em;
  color: var(--copper);
}
.page-about .about-team__item h3 {
  margin: 0 0 8px;
  font-size: 17px;
}
.page-about .about-team__item p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.8;
}
.page-about .about-team__list {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-team__list li {
  position: relative;
  padding-left: 14px;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(19, 36, 30, 0.7);
}
.page-about .about-team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 6px;
  height: 1px;
  background: var(--copper);
}

/* 复核步骤 */
.page-about .about-steps {
  display: grid;
  gap: 1px;
  margin: 24px 0;
  padding: 0;
  list-style: none;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.page-about .about-step {
  padding: 16px 16px 18px;
  background: var(--ink);
}
.page-about .about-step__num {
  display: block;
  margin-bottom: 8px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--gold);
}
.page-about .about-step h3 {
  margin: 0 0 8px;
  font-size: 16px;
}
.page-about .about-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
}

/* 审计与改进 */
.page-about .about-audit {
  margin-top: 22px;
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  background: rgba(28, 68, 55, 0.36);
}
.page-about .about-audit__title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--champagne);
}
.page-about .about-audit__list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .about-audit__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(245, 240, 230, 0.82);
}
.page-about .about-audit__list li::before {
  content: "→";
  position: absolute;
  left: 0;
  font-family: var(--mono);
  color: var(--gold);
}

/* 收尾入口 */
.page-about .about-cta {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: clamp(30px, 4.6vw, 56px) var(--about-pad) clamp(40px, 6vw, 72px);
  border-top: 1px solid var(--line);
}
.page-about .about-cta h2 {
  margin: 0 0 20px;
  font-family: var(--serif);
  font-weight: 300;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.35;
  color: var(--ivory);
}
.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.page-about .about-cta .btn {
  padding: 14px 22px;
  border-radius: 0;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  text-decoration: none;
}

/* 响应式 */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (min-width: 780px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-about .about-pillars {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 30px;
  }
  .page-about .about-pillar {
    padding: 20px 0 0;
  }
}

@media (min-width: 860px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.78fr);
    align-items: start;
    gap: 26px;
  }
  .page-about .about-timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    margin-top: 30px;
  }
  .page-about .about-stage {
    padding: 24px 20px 0 0;
    border-left: 0;
    border-top: 1px solid var(--line);
  }
  .page-about .about-stage::before {
    left: 0;
    top: -5px;
  }
  .page-about .about-stage:last-child {
    padding-right: 0;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, 0.82fr);
    align-items: end;
    gap: 38px;
  }
}

@media (min-width: 980px) {
  .page-about .about-body {
    grid-template-columns: 210px minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-index {
    position: sticky;
    top: calc(var(--bar) + 24px);
    padding-top: 18px;
  }
  .page-about .about-index__list {
    display: grid;
    gap: 2px;
  }
  .page-about .about-index__link {
    width: 100%;
    padding: 8px 0;
    border-bottom: 1px solid var(--line-soft);
  }
  .page-about .about-index__link:hover {
    border-bottom-color: var(--line-strong);
  }
}