.page-about {
  --about-shadow: 6px 6px 0 rgba(6, 27, 46, .55);
  --about-line: rgba(143, 166, 184, .26);
  --about-text-soft: rgba(245, 238, 220, .76);
  background:
    radial-gradient(130% 55% at 50% 0%, rgba(11, 44, 74, .92) 0%, rgba(6, 27, 46, 0) 72%),
    var(--deep-sea);
  color: var(--paper);
  font-family: var(--font-body);
  padding-bottom: clamp(42px, 6vw, 76px);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding-top: clamp(16px, 3vw, 26px);
  font-size: 13px;
  color: var(--mist);
}
.page-about .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .breadcrumbs li + li::before {
  content: "/";
  margin: 0 8px;
  color: rgba(143, 166, 184, .6);
}
.page-about .breadcrumbs a {
  color: var(--cyan);
  text-decoration: none;
}
.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  text-decoration: underline;
}

/* ---------- 首屏框景 ---------- */
.page-about .about-hero {
  padding: clamp(18px, 3vw, 32px) 0 clamp(26px, 4vw, 44px);
}
.page-about .about-hero__frame {
  position: relative;
  padding: clamp(24px, 4.6vw, 54px);
  border: 1px solid var(--line-gold);
  border-radius: var(--radius);
  background:
    linear-gradient(155deg, rgba(11, 44, 74, .96) 0%, rgba(6, 27, 46, .68) 100%);
  box-shadow: 0 24px 52px rgba(0, 0, 0, .38), inset 0 0 0 1px rgba(53, 208, 222, .07);
  overflow: hidden;
}
.page-about .about-hero__frame::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: clamp(54px, 9vw, 96px);
  height: clamp(54px, 9vw, 96px);
  border-top: 2px solid rgba(242, 193, 78, .6);
  border-left: 2px solid rgba(242, 193, 78, .6);
  pointer-events: none;
}
.page-about .about-hero__frame::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: clamp(54px, 9vw, 96px);
  height: clamp(54px, 9vw, 96px);
  border-right: 2px solid rgba(255, 107, 74, .55);
  border-bottom: 2px solid rgba(255, 107, 74, .55);
  pointer-events: none;
}
.page-about .about-hero .eyebrow {
  color: var(--gold-bright);
}
.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 5vw, 54px);
  line-height: 1.2;
  letter-spacing: .005em;
  color: var(--paper);
  text-shadow: 0 0 1px rgba(242, 193, 78, .9), 0 0 22px rgba(242, 193, 78, .16);
}
.page-about .about-hero h1 em {
  font-style: normal;
  color: var(--gold-bright);
  padding-bottom: 2px;
  border-bottom: 3px solid rgba(255, 107, 74, .8);
}
.page-about .about-hero .lede {
  margin: 18px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1vw + 12px, 17.5px);
  line-height: 1.82;
  color: rgba(245, 238, 220, .84);
}

.page-about .hero-metrics {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
}
.page-about .hero-metrics__item {
  padding: 12px 14px;
  border: 1px solid var(--about-line);
  border-left: 3px solid var(--jade);
  border-radius: 2px;
  background: rgba(6, 27, 46, .55);
}
.page-about .hero-metrics dt {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mist);
}
.page-about .hero-metrics dd {
  margin: 6px 0 0;
  font-size: 15px;
  color: var(--paper);
}
.page-about .hero-metrics__num {
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--gold-bright);
  margin-right: 3px;
}

/* ---------- 双栏刊页布局 ---------- */
.page-about .about-layout {
  display: grid;
  gap: clamp(20px, 3vw, 42px);
  padding-top: clamp(6px, 2vw, 18px);
}

/* 章节索引 */
.page-about .about-rail .section-index {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: none;
}
.page-about .about-rail .section-index::-webkit-scrollbar {
  display: none;
}
.page-about .about-rail .section-index a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 8px 12px;
  font-size: 13px;
  color: var(--mist);
  text-decoration: none;
  white-space: nowrap;
  border-bottom: 2px solid rgba(143, 166, 184, .22);
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}
.page-about .about-rail .section-index a:hover,
.page-about .about-rail .section-index a:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--cyan);
}
.page-about .about-rail .section-index a[aria-current="true"] {
  color: var(--gold-bright);
  border-bottom-color: var(--gold);
}
.page-about .section-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--cyan);
}

/* ---------- 章节通用 ---------- */
.page-about .about-body .section {
  scroll-margin-top: 20px;
}
.page-about .about-body .section + .section {
  margin-top: clamp(30px, 4vw, 54px);
  padding-top: clamp(26px, 3.4vw, 44px);
  border-top: 1px dashed rgba(143, 166, 184, .22);
}
.page-about .about-body .section-title {
  margin: 10px 0 0;
}
.page-about .about-body .lede {
  max-width: 66ch;
  margin-top: 14px;
  color: var(--about-text-soft);
  line-height: 1.8;
}
.page-about .about-body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 208, 222, .4);
}
.page-about .about-body a:hover,
.page-about .about-body a:focus-visible {
  color: var(--gold-bright);
  border-bottom-color: var(--gold);
}

/* ---------- 插画容器 ---------- */
.page-about .about-figure {
  position: relative;
  margin: clamp(18px, 2.4vw, 28px) 0;
  overflow: hidden;
  border: 1px solid rgba(242, 193, 78, .42);
  border-radius: var(--radius);
  background: var(--ocean);
  box-shadow: 0 16px 34px rgba(0, 0, 0, .32);
}
.page-about .about-figure--flush {
  margin: 0;
}
.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 年份刻度 ---------- */
.page-about .year-scale {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 clamp(16px, 2vw, 22px);
}
.page-about .year-scale a {
  padding: 5px 11px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan);
  text-decoration: none;
  border: 1px solid rgba(53, 208, 222, .36);
  border-bottom: 1px solid rgba(53, 208, 222, .36);
  border-radius: 2px;
  background: rgba(53, 208, 222, .07);
  transition: background-color .2s ease, color .2s ease, border-color .2s ease;
}
.page-about .year-scale a:hover,
.page-about .year-scale a:focus-visible {
  color: var(--deep-sea);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  position: relative;
  margin: 0;
  padding: 0 0 0 26px;
  list-style: none;
}
.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 4px;
  bottom: 4px;
  width: 2px;
  background: repeating-linear-gradient(
    to bottom,
    rgba(242, 193, 78, .72) 0 9px,
    rgba(242, 193, 78, 0) 9px 18px
  );
}
.page-about .timeline__item {
  position: relative;
  margin-bottom: 16px;
  scroll-margin-top: 96px;
}
.page-about .timeline__item:last-child {
  margin-bottom: 0;
}
.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 17px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--deep-sea);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(242, 193, 78, .1);
}
.page-about .timeline__card {
  padding: 14px 16px 16px;
  border: 1px solid var(--about-line);
  border-left: 3px solid rgba(242, 193, 78, .6);
  border-radius: var(--radius);
  background: linear-gradient(155deg, rgba(11, 44, 74, .86), rgba(6, 27, 46, .55));
  transition: transform .25s ease, border-color .25s ease;
}
.page-about .timeline__year {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold-bright);
}
.page-about .timeline__card h3 {
  margin: 0 0 7px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 1.4vw, 19px);
  line-height: 1.45;
  color: var(--paper);
}
.page-about .timeline__card p:last-child {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--about-text-soft);
}

/* ---------- 角色卡 ---------- */
.page-about .role-grid {
  display: grid;
  gap: 20px;
  margin-top: clamp(18px, 2.4vw, 26px);
}
.page-about .role-card {
  position: relative;
  padding: 22px 18px 18px;
  border: 1px solid rgba(18, 50, 77, .22);
  border-radius: var(--radius);
  background: var(--paper);
  color: var(--ink);
  box-shadow: var(--about-shadow), 0 12px 24px rgba(0, 0, 0, .22);
  transition: transform .25s ease, box-shadow .25s ease;
}
.page-about .role-card__num {
  position: absolute;
  top: -11px;
  left: 16px;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--gold-bright);
  background: var(--ocean);
  border: 1px solid rgba(242, 193, 78, .5);
  border-radius: 2px;
}
.page-about .role-card h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
}
.page-about .role-card__count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1;
  color: var(--coral-ink);
}
.page-about .role-card__count span {
  margin-left: 3px;
  font-family: var(--font-body);
  font-size: 13px;
  font-weight: 400;
  color: var(--paper-ink);
}
.page-about .role-card > p:not(.role-card__count) {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--paper-ink);
}
.page-about .role-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}
.page-about .role-card__tags li {
  padding: 3px 8px;
  font-size: 12px;
  color: var(--ink);
  background: rgba(18, 50, 77, .07);
  border: 1px solid rgba(18, 50, 77, .14);
  border-radius: 2px;
}

/* ---------- 构成比例 ---------- */
.page-about .ratio-block {
  margin-top: clamp(24px, 3vw, 34px);
}
.page-about .ratio-block__cap {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mist);
}
.page-about .ratio-bar {
  display: flex;
  height: 22px;
  overflow: hidden;
  border: 1px solid var(--about-line);
  border-radius: 2px;
}
.page-about .ratio-bar__seg--content {
  flex: 12;
  background: var(--cyan);
}
.page-about .ratio-bar__seg--tech {
  flex: 14;
  background: var(--gold);
}
.page-about .ratio-bar__seg--service {
  flex: 10;
  background: var(--jade);
}
.page-about .ratio-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--mist);
}
.page-about .ratio-legend li {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.page-about .legend-swatch {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 2px;
}
.page-about .legend-swatch--content {
  background: var(--cyan);
}
.page-about .legend-swatch--tech {
  background: var(--gold);
}
.page-about .legend-swatch--service {
  background: var(--jade);
}

/* ---------- 服务标准 ---------- */
.page-about .std-list {
  display: grid;
  gap: 12px;
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  padding: 0;
  list-style: none;
}
.page-about .std-list li {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius);
  background: rgba(11, 44, 74, .5);
}
.page-about .std-list__num {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--deep-sea);
  background: var(--gold);
  border-radius: 2px;
}
.page-about .std-list h3 {
  margin: 0 0 5px;
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
}
.page-about .std-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.74;
  color: var(--about-text-soft);
}

/* ---------- 更新节奏 ---------- */
.page-about .cadence-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(18px, 2.4vw, 26px);
}
.page-about .cadence-card {
  padding: 18px 16px;
  border: 1px solid var(--about-line);
  border-top-width: 3px;
  border-radius: 0 0 var(--radius) var(--radius);
  background: linear-gradient(180deg, rgba(11, 44, 74, .72), rgba(6, 27, 46, .28));
}
.page-about .cadence-card--a {
  border-top-color: var(--cyan);
}
.page-about .cadence-card--b {
  border-top-color: var(--gold);
}
.page-about .cadence-card--c {
  border-top-color: var(--jade);
}
.page-about .cadence-card__big {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.1;
  color: var(--gold-bright);
}
.page-about .cadence-card h3 {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-size: 15px;
  color: var(--paper);
}
.page-about .cadence-card p:last-child {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-text-soft);
}
.page-about .cadence-note {
  margin: clamp(18px, 2.4vw, 24px) 0 0;
  padding: 14px 16px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--about-text-soft);
  border-left: 3px solid var(--violet);
  background: rgba(91, 75, 196, .12);
  border-radius: 0 2px 2px 0;
}

/* ---------- 地域支持 ---------- */
.page-about .region-grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
  margin-top: clamp(18px, 2.4vw, 26px);
}
.page-about .region-stats {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .region-stats li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  font-size: 14px;
  color: var(--about-text-soft);
  border-left: 3px solid var(--coral);
  background: rgba(255, 107, 74, .08);
  border-radius: 0 2px 2px 0;
}
.page-about .region-stats b {
  font-family: var(--font-mono);
  font-size: 21px;
  color: var(--gold-bright);
  white-space: nowrap;
}
.page-about .region-note {
  margin: 16px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--about-text-soft);
}

/* ---------- 资质荣誉 ---------- */
.page-about .honor-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(18px, 2.4vw, 26px);
}
.page-about .honor-card {
  position: relative;
  padding: 20px 18px 18px;
  border: 1px solid rgba(242, 193, 78, .4);
  border-radius: var(--radius);
  background:
    repeating-linear-gradient(135deg, rgba(242, 193, 78, .05) 0 10px, rgba(242, 193, 78, 0) 10px 20px),
    rgba(11, 44, 74, .62);
}
.page-about .honor-card__seal {
  position: absolute;
  top: 12px;
  right: 12px;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 2px solid rgba(255, 107, 74, .72);
  border-radius: 50%;
  color: var(--coral);
  font-family: var(--font-display);
  font-size: 11px;
  line-height: 1;
  transform: rotate(-8deg);
  opacity: .92;
}
.page-about .honor-card h3 {
  margin: 0 44px 8px 0;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper);
}
.page-about .honor-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--about-text-soft);
}

/* ---------- 收束行动区 ---------- */
.page-about .about-cta {
  display: grid;
  gap: 16px;
  margin-top: clamp(28px, 4vw, 46px);
  padding: clamp(20px, 3vw, 32px);
  border: 1px solid rgba(242, 193, 78, .38);
  border-radius: var(--radius);
  background: linear-gradient(140deg, rgba(255, 107, 74, .14), rgba(11, 44, 74, .74));
}
.page-about .about-cta__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 800;
  color: var(--paper);
  text-shadow: 0 0 1px rgba(242, 193, 78, .7);
}
.page-about .about-cta__text {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--about-text-soft);
}
.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 悬停增强（仅指针设备） ---------- */
@media (hover: hover) and (pointer: fine) {
  .page-about .timeline__card:hover {
    transform: translateX(3px);
    border-left-color: var(--gold-bright);
  }
  .page-about .role-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--about-shadow), 0 18px 30px rgba(0, 0, 0, .3);
  }
}

/* ---------- 窄屏收边 ---------- */
@media (max-width: 479px) {
  .page-about .about-hero__frame {
    padding: 22px 18px 24px;
  }
  .page-about .timeline {
    padding-left: 22px;
  }
  .page-about .timeline__item::before {
    left: -20px;
  }
  .page-about .about-cta__actions .btn {
    width: 100%;
    text-align: center;
  }
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 620px) {
  .page-about .hero-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }
}

@media (min-width: 760px) {
  .page-about .std-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .cadence-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-about .honor-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 820px) {
  .page-about .region-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 780px) {
  .page-about .role-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

@media (min-width: 960px) {
  .page-about .about-layout {
    grid-template-columns: 196px minmax(0, 1fr);
    align-items: start;
  }
  .page-about .about-rail {
    position: sticky;
    top: 28px;
  }
  .page-about .about-rail .section-index {
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-about .about-rail .section-index a {
    width: 100%;
    white-space: normal;
    border-bottom: 0;
    border-left: 2px solid rgba(143, 166, 184, .22);
    border-radius: 0 2px 2px 0;
  }
  .page-about .about-rail .section-index a[aria-current="true"] {
    border-left-color: var(--gold);
    background: rgba(242, 193, 78, .08);
  }
  .page-about .about-body .section {
    scroll-margin-top: 32px;
  }
}

@media (min-width: 1080px) {
  .page-about .hero-metrics dd {
    font-size: 16px;
  }
  .page-about .hero-metrics__num {
    font-size: 34px;
  }
}

/* ---------- 减少动态偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .timeline__card,
  .page-about .role-card,
  .page-about .year-scale a,
  .page-about .about-rail .section-index a {
    transition: none;
  }
  .page-about .timeline__card:hover,
  .page-about .role-card:hover {
    transform: none;
  }
}