.page-about {
  --ab-cut: 16px;
  --ab-shell-pad: 20px;
  background: var(--sf-ink);
  color: var(--sf-text);
  font-family: var(--sf-font-body);
  overflow-x: hidden;
}

/* ============ 首屏 ============ */

.page-about .ab-hero {
  position: relative;
  padding: calc(var(--sf-header-h) + 40px) 0 48px;
  overflow: hidden;
  background:
    radial-gradient(110% 80% at 8% 0%, rgba(198, 255, 61, 0.10), transparent 58%),
    radial-gradient(85% 75% at 96% 6%, rgba(111, 216, 255, 0.10), transparent 62%),
    var(--sf-ink);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(38, 49, 60, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(38, 49, 60, 0.32) 1px, transparent 1px);
  background-size: 100% 68px, 68px 100%;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 82%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 82%);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  right: -60px;
  bottom: -110px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 122, 47, 0.14), transparent 68%);
  pointer-events: none;
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  align-items: end;
}

.page-about .ab-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--sf-mist);
  margin-bottom: 22px;
}

.page-about .ab-crumbs a {
  color: var(--sf-ice);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--sf-ease);
}

.page-about .ab-crumbs a:hover {
  border-bottom-color: var(--sf-ice);
}

.page-about .ab-hero__eyebrow {
  margin: 0 0 16px;
}

.page-about .ab-hero__title {
  margin: 0 0 22px;
  font-family: var(--sf-font-display);
  font-weight: 900;
  font-size: clamp(34px, 8vw, 66px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--sf-white);
}

.page-about .ab-hero__lead {
  max-width: 62ch;
  margin: 0 0 30px;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--sf-text);
}

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

.page-about .ab-hero__panel {
  position: relative;
  padding: 22px 20px 20px;
  background: rgba(20, 26, 34, 0.86);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
}

.page-about .ab-hero__panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 46px;
  background: var(--sf-neon);
}

.page-about .ab-badges {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
  margin: 16px 0 16px;
}

.page-about .ab-badge {
  padding: 12px 12px 11px;
  background: var(--sf-ink);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
}

.page-about .ab-badge--wide {
  grid-column: 1 / -1;
}

.page-about .ab-badge__num {
  display: block;
  font-family: var(--sf-font-mono);
  font-size: 26px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--sf-neon);
}

.page-about .ab-badge--wide .ab-badge__num {
  color: var(--sf-orange);
}

.page-about .ab-badge__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--sf-mist);
}

.page-about .ab-hero__side-note {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--sf-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--sf-mist);
}

/* ============ 通用区块头 ============ */

.page-about .ab-head {
  margin-bottom: 30px;
}

.page-about .ab-head__title {
  margin: 10px 0 12px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: clamp(25px, 5vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--sf-white);
}

.page-about .ab-head__note {
  max-width: 60ch;
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--sf-mist);
}

/* ============ 时间轴 ============ */

.page-about .ab-axis {
  padding-top: 44px;
  padding-bottom: 56px;
}

.page-about .ab-axis__track {
  position: relative;
  display: grid;
  gap: 16px;
  padding-left: 34px;
}

.page-about .ab-axis__track::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--sf-neon), var(--sf-ice) 58%, rgba(111, 216, 255, 0));
}

.page-about .ab-node {
  position: relative;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
  transition: border-color 0.2s var(--sf-ease);
}

.page-about .ab-node:hover {
  border-color: rgba(198, 255, 61, 0.5);
}

.page-about .ab-node__dot {
  position: absolute;
  left: -34px;
  top: 20px;
  width: 16px;
  height: 16px;
  background: var(--sf-neon);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  transition: background 0.25s var(--sf-ease);
}

.page-about .ab-node[open] .ab-node__dot {
  background: var(--sf-orange);
}

.page-about .ab-node__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-node__head::-webkit-details-marker {
  display: none;
}

.page-about .ab-node__head::after {
  content: "";
  margin-left: auto;
  align-self: center;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--sf-mist);
  border-bottom: 2px solid var(--sf-mist);
  transform: rotate(45deg);
  transition: transform 0.25s var(--sf-ease);
}

.page-about .ab-node[open] .ab-node__head::after {
  transform: rotate(-135deg);
}

.page-about .ab-node__no {
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--sf-ice);
}

.page-about .ab-node__year {
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sf-ink);
  background: var(--sf-neon);
  padding: 2px 8px;
  clip-path: polygon(0 0, calc(100% - 7px) 0, 100% 7px, 100% 100%, 0 100%);
}

.page-about .ab-node__title {
  flex: 1 1 100%;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: clamp(18px, 3.6vw, 22px);
  line-height: 1.35;
  color: var(--sf-white);
}

.page-about .ab-node__body {
  padding: 0 20px 20px;
}

.page-about .ab-node__body p {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--sf-text);
}

.page-about .ab-node__meta {
  margin: 0 !important;
  padding-top: 10px;
  border-top: 1px dashed var(--sf-line);
  font-family: var(--sf-font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--sf-mist);
}

/* ============ 斜线分隔带 ============ */

.page-about .ab-rule {
  height: 68px;
  border-top: 1px solid var(--sf-line);
  border-bottom: 1px solid var(--sf-line);
  background-color: var(--sf-moss);
  background-image: repeating-linear-gradient(
    -45deg,
    rgba(198, 255, 61, 0.14) 0 6px,
    transparent 6px 20px
  );
  position: relative;
}

.page-about .ab-rule::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 5px;
  transform: translateY(-50%) skewY(-0.8deg);
  background: linear-gradient(90deg, var(--sf-ice), var(--sf-neon) 46%, var(--sf-orange));
  opacity: 0.85;
}

/* ============ 下半部分双栏 ============ */

.page-about .ab-lower {
  padding-top: 48px;
  padding-bottom: 64px;
}

.page-about .ab-lower__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about .ab-col {
  min-width: 0;
}

.page-about .ab-block {
  padding-bottom: 44px;
  margin-bottom: 44px;
  border-bottom: 1px solid var(--sf-line);
}

.page-about .ab-block:last-of-type {
  border-bottom: 0;
  margin-bottom: 28px;
  padding-bottom: 8px;
}

/* ============ 图片 ============ */

.page-about .ab-figure {
  position: relative;
  margin: 0 0 26px;
  overflow: hidden;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.04);
}

.page-about .ab-figure::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 46%;
  background: linear-gradient(180deg, transparent, rgba(10, 13, 18, 0.82));
  pointer-events: none;
}

.page-about .ab-figure__tag {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 1;
  font-family: var(--sf-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--sf-ice);
  background: rgba(18, 50, 64, 0.9);
  padding: 4px 10px;
  border: 1px solid rgba(111, 216, 255, 0.4);
}

/* ============ 团队 ============ */

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

.page-about .ab-role {
  background: var(--sf-ink);
  border: 1px solid var(--sf-line);
  border-left: 3px solid var(--sf-line);
  transition: border-left-color 0.2s var(--sf-ease), background 0.2s var(--sf-ease);
}

.page-about .ab-role[open] {
  border-left-color: var(--sf-neon);
  background: var(--sf-panel);
}

.page-about .ab-role__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-role__head::-webkit-details-marker {
  display: none;
}

.page-about .ab-role__num {
  font-family: var(--sf-font-mono);
  font-size: 24px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--sf-orange);
  min-width: 44px;
}

.page-about .ab-role__name {
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--sf-white);
}

.page-about .ab-role__body {
  padding: 0 18px 16px 58px;
}

.page-about .ab-role__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sf-text);
}

/* ============ 流程 ============ */

.page-about .ab-process {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .ab-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
  counter-reset: none;
}

.page-about .ab-flow__step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 18px 18px 16px;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
}

.page-about .ab-flow__n {
  font-family: var(--sf-font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--sf-neon);
  padding-top: 3px;
}

.page-about .ab-flow__title {
  margin: 0 0 8px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.4;
  color: var(--sf-white);
}

.page-about .ab-flow__step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sf-text);
}

.page-about .ab-process__side {
  min-width: 0;
}

.page-about .ab-note {
  padding: 16px 18px;
  background: var(--sf-ice-deep);
  border: 1px solid rgba(111, 216, 255, 0.28);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
}

.page-about .ab-note__label {
  display: block;
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--sf-ice);
  margin-bottom: 10px;
}

.page-about .ab-note__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .ab-note__list li {
  font-size: 13.5px;
  color: var(--sf-white);
  padding: 4px 12px;
  border: 1px solid rgba(111, 216, 255, 0.4);
  background: rgba(111, 216, 255, 0.08);
}

/* ============ 服务范围 ============ */

.page-about .ab-region {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .ab-region__text > p {
  margin: 0 0 20px;
  font-size: 15.5px;
  line-height: 1.84;
  color: var(--sf-text);
}

.page-about .ab-facts {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--sf-line);
  border: 1px solid var(--sf-line);
}

.page-about .ab-facts li {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 14px;
  padding: 12px 15px;
  background: var(--sf-panel);
}

.page-about .ab-facts__k {
  font-size: 14px;
  color: var(--sf-mist);
}

.page-about .ab-facts__v {
  font-family: var(--sf-font-mono);
  font-size: 14.5px;
  letter-spacing: 0.02em;
  color: var(--sf-neon);
}

.page-about .ab-region__extra {
  margin: 0 0 22px !important;
  color: var(--sf-mist) !important;
  font-size: 14.5px !important;
}

.page-about .ab-region .ab-figure {
  margin-bottom: 0;
}

/* ============ 合作生态 ============ */

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

.page-about .ab-tag {
  position: relative;
  padding: 18px 20px;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
  transition: border-color 0.2s var(--sf-ease), transform 0.2s var(--sf-ease);
}

.page-about .ab-tag:hover {
  border-color: var(--sf-neon);
  transform: translateY(-3px);
}

.page-about .ab-tag__n {
  font-family: var(--sf-font-mono);
  font-size: 28px;
  line-height: 1;
  color: var(--sf-orange);
  display: inline-block;
  margin-right: 12px;
}

.page-about .ab-tag__name {
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--sf-white);
}

.page-about .ab-tag__role {
  display: block;
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--sf-mist);
  transition: color 0.2s var(--sf-ease);
}

.page-about .ab-tag:hover .ab-tag__role {
  color: var(--sf-text);
}

/* ============ 里程碑 ============ */

.page-about .ab-miles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .ab-mile {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  padding: 20px 0;
  border-top: 1px solid var(--sf-line);
}

.page-about .ab-mile:last-child {
  border-bottom: 1px solid var(--sf-line);
}

.page-about .ab-mile__n {
  font-family: var(--sf-font-mono);
  font-size: 38px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--sf-ice);
  min-width: 66px;
}

.page-about .ab-mile__title {
  margin: 0 0 8px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.42;
  color: var(--sf-white);
}

.page-about .ab-mile__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sf-text);
}

/* ============ 结尾入口 ============ */

.page-about .ab-cta {
  padding: 30px 22px;
  background: var(--sf-amber);
  border: 1px solid rgba(255, 122, 47, 0.3);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-about .ab-cta__title {
  margin: 0 0 20px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: clamp(20px, 4vw, 26px);
  line-height: 1.3;
  color: var(--sf-white);
}

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

.page-about .ab-cta__link {
  display: block;
  padding: 14px 16px;
  background: rgba(10, 13, 18, 0.6);
  border: 1px solid rgba(255, 122, 47, 0.35);
  text-decoration: none;
  transition: border-color 0.2s var(--sf-ease), background 0.2s var(--sf-ease);
}

.page-about .ab-cta__link:hover {
  border-color: var(--sf-neon);
  background: rgba(10, 13, 18, 0.85);
}

.page-about .ab-cta__link-k {
  display: block;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 15.5px;
  color: var(--sf-white);
  margin-bottom: 6px;
}

.page-about .ab-cta__link-v {
  display: block;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--sf-mist);
}

/* ============ 右侧导览栏 ============ */

.page-about .ab-aside {
  min-width: 0;
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-about .ab-toc {
  display: grid;
  gap: 2px;
  padding: 18px 18px 16px;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  border-top: 3px solid var(--sf-ice);
}

.page-about .ab-toc__title {
  margin: 0 0 12px;
  font-family: var(--sf-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--sf-ice);
}

.page-about .ab-toc .sf-toc__link {
  display: block;
  padding: 8px 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--sf-mist);
  text-decoration: none;
  border-bottom: 1px solid rgba(38, 49, 60, 0.7);
  transition: color 0.2s var(--sf-ease), padding-left 0.2s var(--sf-ease);
}

.page-about .ab-toc .sf-toc__link:last-child {
  border-bottom: 0;
}

.page-about .ab-toc .sf-toc__link:hover {
  color: var(--sf-white);
  padding-left: 6px;
}

.page-about .ab-toc .sf-toc__link.is-active {
  color: var(--sf-neon);
  padding-left: 6px;
}

.page-about .ab-aside__card {
  padding: 18px;
  background: var(--sf-ink);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-about .ab-aside__card-title {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--sf-mist);
}

.page-about .ab-aside__stats {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-aside__stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--sf-line);
}

.page-about .ab-aside__stat:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-about .ab-aside__stat dt {
  font-size: 13.5px;
  color: var(--sf-mist);
}

.page-about .ab-aside__stat dd {
  margin: 0;
  font-family: var(--sf-font-mono);
  font-size: 20px;
  letter-spacing: 0.02em;
  color: var(--sf-neon);
}

/* ============ 响应式 ============ */

@media (min-width: 700px) {
  .page-about .ab-shell-pad {
    padding-left: 24px;
    padding-right: 24px;
  }

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

  .page-about .ab-cta__links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-cta {
    padding: 34px 28px;
  }
}

@media (min-width: 940px) {
  .page-about .ab-hero {
    padding: calc(var(--sf-header-h) + 76px) 0 72px;
  }

  .page-about .ab-hero__inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(290px, 0.85fr);
    gap: 54px;
  }

  .page-about .ab-axis {
    padding-top: 62px;
    padding-bottom: 72px;
  }

  .page-about .ab-head {
    margin-bottom: 38px;
  }

  .page-about .ab-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .ab-role__head {
    flex-direction: column;
    gap: 8px;
  }

  .page-about .ab-role__body {
    padding-left: 18px;
  }

  .page-about .ab-process {
    grid-template-columns: minmax(0, 1.25fr) minmax(260px, 0.75fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .ab-region {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .ab-lower {
    padding-top: 64px;
    padding-bottom: 84px;
  }

  .page-about .ab-lower__grid {
    grid-template-columns: minmax(0, 1.95fr) minmax(250px, 0.85fr);
    gap: 52px;
  }

  .page-about .ab-aside {
    position: sticky;
    top: calc(var(--sf-header-h) + 26px);
  }
}

@media (min-width: 1160px) {
  .page-about .ab-tags {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-tag__role {
    color: rgba(159, 173, 186, 0.55);
  }

  .page-about .ab-tag:hover .ab-tag__role {
    color: var(--sf-text);
  }

  .page-about .ab-figure--team {
    max-width: 880px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-tag,
  .page-about .ab-cta__link,
  .page-about .ab-toc .sf-toc__link,
  .page-about .ab-node,
  .page-about .ab-role {
    transition: none;
  }

  .page-about .ab-tag:hover {
    transform: none;
  }
}
</main>>>

.page-about {
  --ab-cut: 16px;
  background: var(--sf-ink);
  color: var(--sf-text);
  font-family: var(--sf-font-body);
  overflow-x: hidden;
}

/* ============ 首屏 ============ */

.page-about .ab-hero {
  position: relative;
  padding: calc(var(--sf-header-h) + 40px) 0 48px;
  overflow: hidden;
  background:
    radial-gradient(110% 80% at 8% 0%, rgba(198, 255, 61, 0.10), transparent 58%),
    radial-gradient(85% 75% at 96% 6%, rgba(111, 216, 255, 0.10), transparent 62%),
    var(--sf-ink);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(38, 49, 60, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(38, 49, 60, 0.32) 1px, transparent 1px);
  background-size: 100% 68px, 68px 100%;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 82%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 82%);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -120px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 122, 47, 0.14), transparent 68%);
  pointer-events: none;
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  align-items: end;
}

.page-about .ab-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--sf-mist);
}

.page-about .ab-crumbs a {
  color: var(--sf-ice);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--sf-ease);
}

.page-about .ab-crumbs a:hover {
  border-bottom-color: var(--sf-ice);
}

.page-about .ab-hero__eyebrow {
  margin: 0 0 16px;
}

.page-about .ab-hero__title {
  margin: 0 0 22px;
  font-family: var(--sf-font-display);
  font-weight: 900;
  font-size: clamp(34px, 8vw, 66px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--sf-white);
}

.page-about .ab-hero__lead {
  max-width: 62ch;
  margin: 0 0 30px;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--sf-text);
}

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

.page-about .ab-hero__panel {
  position: relative;
  padding: 22px 20px 20px;
  background: rgba(20, 26, 34, 0.86);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
}

.page-about .ab-hero__panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 46px;
  background: var(--sf-neon);
}

.page-about .ab-badges {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 16px 0;
}

.page-about .ab-badge {
  padding: 12px;
  background: var(--sf-ink);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
}

.page-about .ab-badge--wide {
  grid-column: 1 / -1;
}

.page-about .ab-badge__num {
  display: block;
  font-family: var(--sf-font-mono);
  font-size: 26px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--sf-neon);
}

.page-about .ab-badge--wide .ab-badge__num {
  color: var(--sf-orange);
}

.page-about .ab-badge__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--sf-mist);
}

.page-about .ab-hero__side-note {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--sf-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--sf-mist);
}

/* ============ 区块头 ============ */

.page-about .ab-head {
  margin-bottom: 30px;
}

.page-about .ab-head__title {
  margin: 10px 0 12px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: clamp(25px, 5vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--sf-white);
}

.page-about .ab-head__note {
  max-width: 60ch;
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--sf-mist);
}

/* ============ 时间轴 ============ */

.page-about .ab-axis {
  padding-top: 44px;
  padding-bottom: 56px;
}

.page-about .ab-axis__track {
  position: relative;
  display: grid;
  gap: 16px;
  padding-left: 34px;
}

.page-about .ab-axis__track::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--sf-neon), var(--sf-ice) 58%, rgba(111, 216, 255, 0));
}

.page-about .ab-node {
  position: relative;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
  transition: border-color 0.2s var(--sf-ease);
}

.page-about .ab-node:hover {
  border-color: rgba(198, 255, 61, 0.5);
}

.page-about .ab-node__dot {
  position: absolute;
  left: -33px;
  top: 22px;
  width: 16px;
  height: 16px;
  background: var(--sf-neon);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  transition: background 0.25s var(--sf-ease);
}

.page-about .ab-node[open] .ab-node__dot {
  background: var(--sf-orange);
}

.page-about .ab-node__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-node__head::-webkit-details-marker {
  display: none;
}

.page-about .ab-node__head::after {
  content: "";
  margin-left: auto;
  align-self: center;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--sf-mist);
  border-bottom: 2px solid var(--sf-mist);
  transform: rotate(45deg);
  transition: transform 0.25s var(--sf-ease);
}

.page-about .ab-node[open] .ab-node__head::after {
  transform: rotate(-135deg);
  border-color: var(--sf-neon);
}

.page-about .ab-node__no {
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--sf-ice);
}

.page-about .ab-node__year {
  padding: 2px 9px;
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sf-ink);
  background: var(--sf-neon);
  clip-path: polygon(0 0, calc(100% - 7px) 0, 100% 7px, 100% 100%, 0 100%);
}

.page-about .ab-node__title {
  flex: 1 1 100%;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: clamp(18px, 3.6vw, 22px);
  line-height: 1.35;
  color: var(--sf-white);
}

.page-about .ab-node__body {
  padding: 0 20px 20px;
}

.page-about .ab-node__body p {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--sf-text);
}

.page-about .ab-node__meta {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--sf-line);
  font-family: var(--sf-font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--sf-mist);
}

/* ============ 斜线分隔带 ============ */

.page-about .ab-rule {
  position: relative;
  height: 68px;
  border-top: 1px solid var(--sf-line);
  border-bottom: 1px solid var(--sf-line);
  background-color: var(--sf-moss);
  background-image: repeating-linear-gradient(
    -45deg,
    rgba(198, 255, 61, 0.14) 0 6px,
    transparent 6px 20px
  );
}

.page-about .ab-rule::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 5px;
  transform: translateY(-50%) skewY(-0.8deg);
  background: linear-gradient(90deg, var(--sf-ice), var(--sf-neon) 46%, var(--sf-orange));
  opacity: 0.85;
}

/* ============ 双栏主体 ============ */

.page-about .ab-lower {
  padding-top: 48px;
  padding-bottom: 64px;
}

.page-about .ab-lower__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about .ab-col {
  min-width: 0;
}

.page-about .ab-block {
  padding-bottom: 44px;
  margin-bottom: 44px;
  border-bottom: 1px solid var(--sf-line);
}

.page-about .ab-block:last-of-type {
  padding-bottom: 8px;
  margin-bottom: 28px;
  border-bottom: 0;
}

/* ============ 图片 ============ */

.page-about .ab-figure {
  position: relative;
  margin: 0 0 26px;
  overflow: hidden;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.04);
}

.page-about .ab-figure::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 46%;
  background: linear-gradient(180deg, transparent, rgba(10, 13, 18, 0.82));
  pointer-events: none;
}

.page-about .ab-figure__tag {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 1;
  padding: 4px 10px;
  font-family: var(--sf-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--sf-ice);
  background: rgba(18, 50, 64, 0.9);
  border: 1px solid rgba(111, 216, 255, 0.4);
}

/* ============ 团队 ============ */

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

.page-about .ab-role {
  background: var(--sf-ink);
  border: 1px solid var(--sf-line);
  border-left: 3px solid var(--sf-line);
  transition: border-left-color 0.2s var(--sf-ease), background 0.2s var(--sf-ease);
}

.page-about .ab-role[open] {
  border-left-color: var(--sf-neon);
  background: var(--sf-panel);
}

.page-about .ab-role__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-role__head::-webkit-details-marker {
  display: none;
}

.page-about .ab-role__num {
  min-width: 42px;
  font-family: var(--sf-font-mono);
  font-size: 24px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--sf-orange);
}

.page-about .ab-role__name {
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--sf-white);
}

.page-about .ab-role__body {
  padding: 0 18px 16px 58px;
}

.page-about .ab-role__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sf-text);
}

/* ============ 流程 ============ */

.page-about .ab-process {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .ab-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .ab-flow__step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 18px 18px 16px;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
}

.page-about .ab-flow__n {
  padding-top: 3px;
  font-family: var(--sf-font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--sf-neon);
}

.page-about .ab-flow__title {
  margin: 0 0 8px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.4;
  color: var(--sf-white);
}

.page-about .ab-flow__step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sf-text);
}

.page-about .ab-process__side {
  min-width: 0;
}

.page-about .ab-note {
  padding: 16px 18px;
  background: var(--sf-ice-deep);
  border: 1px solid rgba(111, 216, 255, 0.28);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
}

.page-about .ab-note__label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--sf-ice);
}

.page-about .ab-note__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .ab-note__list li {
  padding: 4px 12px;
  font-size: 13.5px;
  color: var(--sf-white);
  border: 1px solid rgba(111, 216, 255, 0.4);
  background: rgba(111, 216, 255, 0.08);
}

/* ============ 服务范围 ============ */

.page-about .ab-region {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .ab-region__text > p {
  margin: 0 0 20px;
  font-size: 15.5px;
  line-height: 1.84;
  color: var(--sf-text);
}

.page-about .ab-facts {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--sf-line);
  border: 1px solid var(--sf-line);
}

.page-about .ab-facts li {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 14px;
  padding: 12px 15px;
  background: var(--sf-panel);
}

.page-about .ab-facts__k {
  font-size: 14px;
  color: var(--sf-mist);
}

.page-about .ab-facts__v {
  font-family: var(--sf-font-mono);
  font-size: 14.5px;
  letter-spacing: 0.02em;
  color: var(--sf-neon);
}

.page-about .ab-region__extra {
  margin: 0 0 22px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--sf-mist);
}

.page-about .ab-region .ab-figure {
  margin-bottom: 0;
}

/* ============ 合作生态 ============ */

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

.page-about .ab-tag {
  position: relative;
  padding: 18px 20px;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
  transition: border-color 0.2s var(--sf-ease), transform 0.2s var(--sf-ease);
}

.page-about .ab-tag:hover {
  border-color: var(--sf-neon);
  transform: translateY(-3px);
}

.page-about .ab-tag__n {
  display: inline-block;
  margin-right: 12px;
  font-family: var(--sf-font-mono);
  font-size: 28px;
  line-height: 1;
  color: var(--sf-orange);
}

.page-about .ab-tag__name {
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--sf-white);
}

.page-about .ab-tag__role {
  display: block;
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(159, 173, 186, 0.6);
  transition: color 0.2s var(--sf-ease);
}

.page-about .ab-tag:hover .ab-tag__role {
  color: var(--sf-text);
}

/* ============ 里程碑 ============ */

.page-about .ab-miles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .ab-mile {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  padding: 20px 0;
  border-top: 1px solid var(--sf-line);
}

.page-about .ab-mile:last-child {
  border-bottom: 1px solid var(--sf-line);
}

.page-about .ab-mile__n {
  min-width: 62px;
  font-family: var(--sf-font-mono);
  font-size: 36px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--sf-ice);
}

.page-about .ab-mile__title {
  margin: 0 0 8px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.42;
  color: var(--sf-white);
}

.page-about .ab-mile__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sf-text);
}

/* ============ 结尾入口 ============ */

.page-about .ab-cta {
  padding: 30px 22px;
  background: var(--sf-amber);
  border: 1px solid rgba(255, 122, 47, 0.3);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-about .ab-cta__title {
  margin: 0 0 20px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: clamp(20px, 4vw, 26px);
  line-height: 1.3;
  color: var(--sf-white);
}

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

.page-about .ab-cta__link {
  display: block;
  padding: 14px 16px;
  background: rgba(10, 13, 18, 0.6);
  border: 1px solid rgba(255, 122, 47, 0.35);
  text-decoration: none;
  transition: border-color 0.2s var(--sf-ease), background 0.2s var(--sf-ease);
}

.page-about .ab-cta__link:hover {
  border-color: var(--sf-neon);
  background: rgba(10, 13, 18, 0.85);
}

.page-about .ab-cta__link-k {
  display: block;
  margin-bottom: 6px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 15.5px;
  color: var(--sf-white);
}

.page-about .ab-cta__link-v {
  display: block;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--sf-mist);
}

/* ============ 右侧导览栏 ============ */

.page-about .ab-aside {
  min-width: 0;
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-about .ab-toc {
  display: grid;
  gap: 2px;
  padding: 18px 18px 16px;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  border-top: 3px solid var(--sf-ice);
}

.page-about .ab-toc__title {
  margin: 0 0 12px;
  font-family: var(--sf-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--sf-ice);
}

.page-about .ab-toc .sf-toc__link {
  display: block;
  padding: 8px 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--sf-mist);
  text-decoration: none;
  border-bottom: 1px solid rgba(38, 49, 60, 0.7);
  transition: color 0.2s var(--sf-ease), padding-left 0.2s var(--sf-ease);
}

.page-about .ab-toc .sf-toc__link:last-child {
  border-bottom: 0;
}

.page-about .ab-toc .sf-toc__link:hover,
.page-about .ab-toc .sf-toc__link.is-active {
  color: var(--sf-neon);
  padding-left: 6px;
}

.page-about .ab-aside__card {
  padding: 18px;
  background: var(--sf-ink);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-about .ab-aside__card-title {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--sf-mist);
}

.page-about .ab-aside__stats {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-aside__stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--sf-line);
}

.page-about .ab-aside__stat:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .ab-aside__stat dt {
  font-size: 13.5px;
  color: var(--sf-mist);
}

.page-about .ab-aside__stat dd {
  margin: 0;
  font-family: var(--sf-font-mono);
  font-size: 20px;
  letter-spacing: 0.02em;
  color: var(--sf-neon);
}

/* ============ 响应式 ============ */

@media (min-width: 700px) {
  .page-about .ab-cta {
    padding: 34px 28px;
  }

  .page-about .ab-cta__links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 940px) {
  .page-about .ab-hero {
    padding: calc(var(--sf-header-h) + 76px) 0 72px;
  }

  .page-about .ab-hero__inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(290px, 0.85fr);
    gap: 54px;
  }

  .page-about .ab-axis {
    padding-top: 62px;
    padding-bottom: 72px;
  }

  .page-about .ab-head {
    margin-bottom: 38px;
  }

  .page-about .ab-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .ab-role__head {
    flex-direction: column;
    gap: 8px;
  }

  .page-about .ab-role__body {
    padding-left: 18px;
  }

  .page-about .ab-process {
    grid-template-columns: minmax(0, 1.25fr) minmax(260px, 0.75fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .ab-region {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .ab-lower {
    padding-top: 64px;
    padding-bottom: 84px;
  }

  .page-about .ab-lower__grid {
    grid-template-columns: minmax(0, 1.95fr) minmax(250px, 0.85fr);
    gap: 52px;
  }

  .page-about .ab-aside {
    position: sticky;
    top: calc(var(--sf-header-h) + 26px);
  }
}

@media (min-width: 1160px) {
  .page-about .ab-tags {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-figure--team {
    max-width: 880px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-tag,
  .page-about .ab-cta__link,
  .page-about .ab-toc .sf-toc__link,
  .page-about .ab-node,
  .page-about .ab-role {
    transition: none;
  }

  .page-about .ab-tag:hover {
    transform: none;
  }
}

.page-about {
  --ab-cut: 16px;
  background: var(--sf-ink);
  color: var(--sf-text);
  font-family: var(--sf-font-body);
  overflow-x: hidden;
}

/* ============ 首屏 ============ */

.page-about .ab-hero {
  position: relative;
  padding: calc(var(--sf-header-h) + 40px) 0 48px;
  overflow: hidden;
  background:
    radial-gradient(110% 80% at 8% 0%, rgba(198, 255, 61, 0.10), transparent 58%),
    radial-gradient(85% 75% at 96% 6%, rgba(111, 216, 255, 0.10), transparent 62%),
    var(--sf-ink);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(38, 49, 60, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(38, 49, 60, 0.32) 1px, transparent 1px);
  background-size: 100% 68px, 68px 100%;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 82%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 82%);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -120px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 122, 47, 0.14), transparent 68%);
  pointer-events: none;
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  align-items: end;
}

.page-about .ab-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--sf-mist);
}

.page-about .ab-crumbs a {
  color: var(--sf-ice);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--sf-ease);
}

.page-about .ab-crumbs a:hover {
  border-bottom-color: var(--sf-ice);
}

.page-about .ab-hero__eyebrow {
  margin: 0 0 16px;
}

.page-about .ab-hero__title {
  margin: 0 0 22px;
  font-family: var(--sf-font-display);
  font-weight: 900;
  font-size: clamp(34px, 8vw, 66px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--sf-white);
}

.page-about .ab-hero__lead {
  max-width: 62ch;
  margin: 0 0 30px;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--sf-text);
}

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

.page-about .ab-hero__panel {
  position: relative;
  padding: 22px 20px 20px;
  background: rgba(20, 26, 34, 0.86);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
}

.page-about .ab-hero__panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 46px;
  background: var(--sf-neon);
}

.page-about .ab-badges {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 16px 0;
}

.page-about .ab-badge {
  padding: 12px;
  background: var(--sf-ink);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
}

.page-about .ab-badge--wide {
  grid-column: 1 / -1;
}

.page-about .ab-badge__num {
  display: block;
  font-family: var(--sf-font-mono);
  font-size: 26px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--sf-neon);
}

.page-about .ab-badge--wide .ab-badge__num {
  color: var(--sf-orange);
}

.page-about .ab-badge__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--sf-mist);
}

.page-about .ab-hero__side-note {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--sf-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--sf-mist);
}

/* ============ 区块头 ============ */

.page-about .ab-head {
  margin-bottom: 30px;
}

.page-about .ab-head__title {
  margin: 10px 0 12px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: clamp(25px, 5vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--sf-white);
}

.page-about .ab-head__note {
  max-width: 60ch;
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--sf-mist);
}

/* ============ 时间轴 ============ */

.page-about .ab-axis {
  padding-top: 44px;
  padding-bottom: 56px;
}

.page-about .ab-axis__track {
  position: relative;
  display: grid;
  gap: 16px;
  padding-left: 34px;
}

.page-about .ab-axis__track::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--sf-neon), var(--sf-ice) 58%, rgba(111, 216, 255, 0));
}

.page-about .ab-node {
  position: relative;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
  transition: border-color 0.2s var(--sf-ease);
}

.page-about .ab-node:hover {
  border-color: rgba(198, 255, 61, 0.5);
}

.page-about .ab-node__dot {
  position: absolute;
  left: -33px;
  top: 22px;
  width: 16px;
  height: 16px;
  background: var(--sf-neon);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  transition: background 0.25s var(--sf-ease);
}

.page-about .ab-node[open] .ab-node__dot {
  background: var(--sf-orange);
}

.page-about .ab-node__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-node__head::-webkit-details-marker {
  display: none;
}

.page-about .ab-node__head::after {
  content: "";
  margin-left: auto;
  align-self: center;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--sf-mist);
  border-bottom: 2px solid var(--sf-mist);
  transform: rotate(45deg);
  transition: transform 0.25s var(--sf-ease);
}

.page-about .ab-node[open] .ab-node__head::after {
  transform: rotate(-135deg);
  border-color: var(--sf-neon);
}

.page-about .ab-node__no {
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--sf-ice);
}

.page-about .ab-node__year {
  padding: 2px 9px;
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sf-ink);
  background: var(--sf-neon);
  clip-path: polygon(0 0, calc(100% - 7px) 0, 100% 7px, 100% 100%, 0 100%);
}

.page-about .ab-node__title {
  flex: 1 1 100%;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: clamp(18px, 3.6vw, 22px);
  line-height: 1.35;
  color: var(--sf-white);
}

.page-about .ab-node__body {
  padding: 0 20px 20px;
}

.page-about .ab-node__body p {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--sf-text);
}

.page-about .ab-node__meta {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--sf-line);
  font-family: var(--sf-font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--sf-mist);
}

/* ============ 斜线分隔带 ============ */

.page-about .ab-rule {
  position: relative;
  height: 68px;
  border-top: 1px solid var(--sf-line);
  border-bottom: 1px solid var(--sf-line);
  background-color: var(--sf-moss);
  background-image: repeating-linear-gradient(
    -45deg,
    rgba(198, 255, 61, 0.14) 0 6px,
    transparent 6px 20px
  );
}

.page-about .ab-rule::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 5px;
  transform: translateY(-50%) skewY(-0.8deg);
  background: linear-gradient(90deg, var(--sf-ice), var(--sf-neon) 46%, var(--sf-orange));
  opacity: 0.85;
}

/* ============ 双栏主体 ============ */

.page-about .ab-lower {
  padding-top: 48px;
  padding-bottom: 64px;
}

.page-about .ab-lower__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about .ab-col {
  min-width: 0;
}

.page-about .ab-block {
  padding-bottom: 44px;
  margin-bottom: 44px;
  border-bottom: 1px solid var(--sf-line);
}

.page-about .ab-block:last-of-type {
  padding-bottom: 8px;
  margin-bottom: 28px;
  border-bottom: 0;
}

/* ============ 图片 ============ */

.page-about .ab-figure {
  position: relative;
  margin: 0 0 26px;
  overflow: hidden;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.04);
}

.page-about .ab-figure::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 46%;
  background: linear-gradient(180deg, transparent, rgba(10, 13, 18, 0.82));
  pointer-events: none;
}

.page-about .ab-figure__tag {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 1;
  padding: 4px 10px;
  font-family: var(--sf-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--sf-ice);
  background: rgba(18, 50, 64, 0.9);
  border: 1px solid rgba(111, 216, 255, 0.4);
}

/* ============ 团队 ============ */

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

.page-about .ab-role {
  background: var(--sf-ink);
  border: 1px solid var(--sf-line);
  border-left: 3px solid var(--sf-line);
  transition: border-left-color 0.2s var(--sf-ease), background 0.2s var(--sf-ease);
}

.page-about .ab-role[open] {
  border-left-color: var(--sf-neon);
  background: var(--sf-panel);
}

.page-about .ab-role__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-role__head::-webkit-details-marker {
  display: none;
}

.page-about .ab-role__num {
  min-width: 42px;
  font-family: var(--sf-font-mono);
  font-size: 24px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--sf-orange);
}

.page-about .ab-role__name {
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--sf-white);
}

.page-about .ab-role__body {
  padding: 0 18px 16px 58px;
}

.page-about .ab-role__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sf-text);
}

/* ============ 流程 ============ */

.page-about .ab-process {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .ab-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .ab-flow__step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 18px 18px 16px;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
}

.page-about .ab-flow__n {
  padding-top: 3px;
  font-family: var(--sf-font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--sf-neon);
}

.page-about .ab-flow__title {
  margin: 0 0 8px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.4;
  color: var(--sf-white);
}

.page-about .ab-flow__step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sf-text);
}

.page-about .ab-process__side {
  min-width: 0;
}

.page-about .ab-note {
  padding: 16px 18px;
  background: var(--sf-ice-deep);
  border: 1px solid rgba(111, 216, 255, 0.28);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
}

.page-about .ab-note__label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--sf-ice);
}

.page-about .ab-note__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .ab-note__list li {
  padding: 4px 12px;
  font-size: 13.5px;
  color: var(--sf-white);
  border: 1px solid rgba(111, 216, 255, 0.4);
  background: rgba(111, 216, 255, 0.08);
}

/* ============ 服务范围 ============ */

.page-about .ab-region {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .ab-region__text > p {
  margin: 0 0 20px;
  font-size: 15.5px;
  line-height: 1.84;
  color: var(--sf-text);
}

.page-about .ab-facts {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--sf-line);
  border: 1px solid var(--sf-line);
}

.page-about .ab-facts li {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 14px;
  padding: 12px 15px;
  background: var(--sf-panel);
}

.page-about .ab-facts__k {
  font-size: 14px;
  color: var(--sf-mist);
}

.page-about .ab-facts__v {
  font-family: var(--sf-font-mono);
  font-size: 14.5px;
  letter-spacing: 0.02em;
  color: var(--sf-neon);
}

.page-about .ab-region__extra {
  margin: 0 0 22px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--sf-mist);
}

.page-about .ab-region .ab-figure {
  margin-bottom: 0;
}

/* ============ 合作生态 ============ */

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

.page-about .ab-tag {
  position: relative;
  padding: 18px 20px;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
  transition: border-color 0.2s var(--sf-ease), transform 0.2s var(--sf-ease);
}

.page-about .ab-tag:hover {
  border-color: var(--sf-neon);
  transform: translateY(-3px);
}

.page-about .ab-tag__n {
  display: inline-block;
  margin-right: 12px;
  font-family: var(--sf-font-mono);
  font-size: 28px;
  line-height: 1;
  color: var(--sf-orange);
}

.page-about .ab-tag__name {
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--sf-white);
}

.page-about .ab-tag__role {
  display: block;
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(159, 173, 186, 0.6);
  transition: color 0.2s var(--sf-ease);
}

.page-about .ab-tag:hover .ab-tag__role {
  color: var(--sf-text);
}

/* ============ 里程碑 ============ */

.page-about .ab-miles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .ab-mile {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  padding: 20px 0;
  border-top: 1px solid var(--sf-line);
}

.page-about .ab-mile:last-child {
  border-bottom: 1px solid var(--sf-line);
}

.page-about .ab-mile__n {
  min-width: 62px;
  font-family: var(--sf-font-mono);
  font-size: 36px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--sf-ice);
}

.page-about .ab-mile__title {
  margin: 0 0 8px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.42;
  color: var(--sf-white);
}

.page-about .ab-mile__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sf-text);
}

/* ============ 结尾入口 ============ */

.page-about .ab-cta {
  padding: 30px 22px;
  background: var(--sf-amber);
  border: 1px solid rgba(255, 122, 47, 0.3);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-about .ab-cta__title {
  margin: 0 0 20px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: clamp(20px, 4vw, 26px);
  line-height: 1.3;
  color: var(--sf-white);
}

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

.page-about .ab-cta__link {
  display: block;
  padding: 14px 16px;
  background: rgba(10, 13, 18, 0.6);
  border: 1px solid rgba(255, 122, 47, 0.35);
  text-decoration: none;
  transition: border-color 0.2s var(--sf-ease), background 0.2s var(--sf-ease);
}

.page-about .ab-cta__link:hover {
  border-color: var(--sf-neon);
  background: rgba(10, 13, 18, 0.85);
}

.page-about .ab-cta__link-k {
  display: block;
  margin-bottom: 6px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 15.5px;
  color: var(--sf-white);
}

.page-about .ab-cta__link-v {
  display: block;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--sf-mist);
}

/* ============ 右侧导览栏 ============ */

.page-about .ab-aside {
  min-width: 0;
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-about .ab-toc {
  display: grid;
  gap: 2px;
  padding: 18px 18px 16px;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  border-top: 3px solid var(--sf-ice);
}

.page-about .ab-toc__title {
  margin: 0 0 12px;
  font-family: var(--sf-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--sf-ice);
}

.page-about .ab-toc .sf-toc__link {
  display: block;
  padding: 8px 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--sf-mist);
  text-decoration: none;
  border-bottom: 1px solid rgba(38, 49, 60, 0.7);
  transition: color 0.2s var(--sf-ease), padding-left 0.2s var(--sf-ease);
}

.page-about .ab-toc .sf-toc__link:last-child {
  border-bottom: 0;
}

.page-about .ab-toc .sf-toc__link:hover,
.page-about .ab-toc .sf-toc__link.is-active {
  color: var(--sf-neon);
  padding-left: 6px;
}

.page-about .ab-aside__card {
  padding: 18px;
  background: var(--sf-ink);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-about .ab-aside__card-title {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--sf-mist);
}

.page-about .ab-aside__stats {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-aside__stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--sf-line);
}

.page-about .ab-aside__stat:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .ab-aside__stat dt {
  font-size: 13.5px;
  color: var(--sf-mist);
}

.page-about .ab-aside__stat dd {
  margin: 0;
  font-family: var(--sf-font-mono);
  font-size: 20px;
  letter-spacing: 0.02em;
  color: var(--sf-neon);
}

/* ============ 响应式 ============ */

@media (min-width: 700px) {
  .page-about .ab-cta {
    padding: 34px 28px;
  }

  .page-about .ab-cta__links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 940px) {
  .page-about .ab-hero {
    padding: calc(var(--sf-header-h) + 76px) 0 72px;
  }

  .page-about .ab-hero__inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(290px, 0.85fr);
    gap: 54px;
  }

  .page-about .ab-axis {
    padding-top: 62px;
    padding-bottom: 72px;
  }

  .page-about .ab-head {
    margin-bottom: 38px;
  }

  .page-about .ab-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .ab-role__head {
    flex-direction: column;
    gap: 8px;
  }

  .page-about .ab-role__body {
    padding-left: 18px;
  }

  .page-about .ab-process {
    grid-template-columns: minmax(0, 1.25fr) minmax(260px, 0.75fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .ab-region {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .ab-lower {
    padding-top: 64px;
    padding-bottom: 84px;
  }

  .page-about .ab-lower__grid {
    grid-template-columns: minmax(0, 1.95fr) minmax(250px, 0.85fr);
    gap: 52px;
  }

  .page-about .ab-aside {
    position: sticky;
    top: calc(var(--sf-header-h) + 26px);
  }
}

@media (min-width: 1160px) {
  .page-about .ab-tags {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-figure--team {
    max-width: 880px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-tag,
  .page-about .ab-cta__link,
  .page-about .ab-toc .sf-toc__link,
  .page-about .ab-node,
  .page-about .ab-role {
    transition: none;
  }

  .page-about .ab-tag:hover {
    transform: none;
  }
}

.page-about {
  --ab-cut: 16px;
  background: var(--sf-ink);
  color: var(--sf-text);
  font-family: var(--sf-font-body);
  overflow-x: hidden;
}

.page-about .ab-hero {
  position: relative;
  padding: calc(var(--sf-header-h) + 40px) 0 48px;
  overflow: hidden;
  background:
    radial-gradient(110% 80% at 8% 0%, rgba(198, 255, 61, 0.1), transparent 58%),
    radial-gradient(85% 75% at 96% 6%, rgba(111, 216, 255, 0.1), transparent 62%),
    var(--sf-ink);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(38, 49, 60, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(38, 49, 60, 0.32) 1px, transparent 1px);
  background-size: 100% 68px, 68px 100%;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 82%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 82%);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -120px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 122, 47, 0.14), transparent 68%);
  pointer-events: none;
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  align-items: end;
}

.page-about .ab-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--sf-mist);
}

.page-about .ab-crumbs a {
  color: var(--sf-ice);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--sf-ease);
}

.page-about .ab-crumbs a:hover {
  border-bottom-color: var(--sf-ice);
}

.page-about .ab-hero__eyebrow {
  margin: 0 0 16px;
}

.page-about .ab-hero__title {
  margin: 0 0 22px;
  font-family: var(--sf-font-display);
  font-weight: 900;
  font-size: clamp(34px, 8vw, 66px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--sf-white);
}

.page-about .ab-hero__lead {
  max-width: 62ch;
  margin: 0 0 30px;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--sf-text);
}

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

.page-about .ab-hero__panel {
  position: relative;
  padding: 22px 20px 20px;
  background: rgba(20, 26, 34, 0.86);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
}

.page-about .ab-hero__panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 46px;
  background: var(--sf-neon);
}

.page-about .ab-badges {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 16px 0;
}

.page-about .ab-badge {
  padding: 12px;
  background: var(--sf-ink);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
}

.page-about .ab-badge--wide {
  grid-column: 1 / -1;
}

.page-about .ab-badge__num {
  display: block;
  font-family: var(--sf-font-mono);
  font-size: 26px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--sf-neon);
}

.page-about .ab-badge--wide .ab-badge__num {
  color: var(--sf-orange);
}

.page-about .ab-badge__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--sf-mist);
}

.page-about .ab-hero__side-note {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--sf-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--sf-mist);
}

.page-about .ab-head {
  margin-bottom: 30px;
}

.page-about .ab-head__title {
  margin: 10px 0 12px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: clamp(25px, 5vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--sf-white);
}

.page-about .ab-head__note {
  max-width: 60ch;
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--sf-mist);
}

.page-about .ab-axis {
  padding-top: 44px;
  padding-bottom: 56px;
}

.page-about .ab-axis__track {
  position: relative;
  display: grid;
  gap: 16px;
  padding-left: 34px;
}

.page-about .ab-axis__track::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--sf-neon), var(--sf-ice) 58%, rgba(111, 216, 255, 0));
}

.page-about .ab-node {
  position: relative;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
  transition: border-color 0.2s var(--sf-ease);
}

.page-about .ab-node:hover {
  border-color: rgba(198, 255, 61, 0.5);
}

.page-about .ab-node__dot {
  position: absolute;
  left: -33px;
  top: 22px;
  width: 16px;
  height: 16px;
  background: var(--sf-neon);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  transition: background 0.25s var(--sf-ease);
}

.page-about .ab-node[open] .ab-node__dot {
  background: var(--sf-orange);
}

.page-about .ab-node__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-node__head::-webkit-details-marker {
  display: none;
}

.page-about .ab-node__head::after {
  content: "";
  margin-left: auto;
  align-self: center;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--sf-mist);
  border-bottom: 2px solid var(--sf-mist);
  transform: rotate(45deg);
  transition: transform 0.25s var(--sf-ease);
}

.page-about .ab-node[open] .ab-node__head::after {
  transform: rotate(-135deg);
  border-color: var(--sf-neon);
}

.page-about .ab-node__no {
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--sf-ice);
}

.page-about .ab-node__year {
  padding: 2px 9px;
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sf-ink);
  background: var(--sf-neon);
  clip-path: polygon(0 0, calc(100% - 7px) 0, 100% 7px, 100% 100%, 0 100%);
}

.page-about .ab-node__title {
  flex: 1 1 100%;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: clamp(18px, 3.6vw, 22px);
  line-height: 1.35;
  color: var(--sf-white);
}

.page-about .ab-node__body {
  padding: 0 20px 20px;
}

.page-about .ab-node__body p {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--sf-text);
}

.page-about .ab-node__meta {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--sf-line);
  font-family: var(--sf-font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--sf-mist);
}

.page-about .ab-rule {
  position: relative;
  height: 68px;
  border-top: 1px solid var(--sf-line);
  border-bottom: 1px solid var(--sf-line);
  background-color: var(--sf-moss);
  background-image: repeating-linear-gradient(
    -45deg,
    rgba(198, 255, 61, 0.14) 0 6px,
    transparent 6px 20px
  );
}

.page-about .ab-rule::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 5px;
  transform: translateY(-50%) skewY(-0.8deg);
  background: linear-gradient(90deg, var(--sf-ice), var(--sf-neon) 46%, var(--sf-orange));
  opacity: 0.85;
}

.page-about .ab-lower {
  padding-top: 48px;
  padding-bottom: 64px;
}

.page-about .ab-lower__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about .ab-col {
  min-width: 0;
}

.page-about .ab-block {
  padding-bottom: 44px;
  margin-bottom: 44px;
  border-bottom: 1px solid var(--sf-line);
}

.page-about .ab-block:last-of-type {
  padding-bottom: 8px;
  margin-bottom: 28px;
  border-bottom: 0;
}

.page-about .ab-figure {
  position: relative;
  margin: 0 0 26px;
  overflow: hidden;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.04);
}

.page-about .ab-figure::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 46%;
  background: linear-gradient(180deg, transparent, rgba(10, 13, 18, 0.82));
  pointer-events: none;
}

.page-about .ab-figure__tag {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 1;
  padding: 4px 10px;
  font-family: var(--sf-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--sf-ice);
  background: rgba(18, 50, 64, 0.9);
  border: 1px solid rgba(111, 216, 255, 0.4);
}

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

.page-about .ab-role {
  background: var(--sf-ink);
  border: 1px solid var(--sf-line);
  border-left: 3px solid var(--sf-line);
  transition: border-left-color 0.2s var(--sf-ease), background 0.2s var(--sf-ease);
}

.page-about .ab-role[open] {
  border-left-color: var(--sf-neon);
  background: var(--sf-panel);
}

.page-about .ab-role__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-role__head::-webkit-details-marker {
  display: none;
}

.page-about .ab-role__num {
  min-width: 42px;
  font-family: var(--sf-font-mono);
  font-size: 24px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--sf-orange);
}

.page-about .ab-role__name {
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--sf-white);
}

.page-about .ab-role__body {
  padding: 0 18px 16px 58px;
}

.page-about .ab-role__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sf-text);
}

.page-about .ab-process {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .ab-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .ab-flow__step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 18px 18px 16px;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
}

.page-about .ab-flow__n {
  padding-top: 3px;
  font-family: var(--sf-font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--sf-neon);
}

.page-about .ab-flow__title {
  margin: 0 0 8px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.4;
  color: var(--sf-white);
}

.page-about .ab-flow__step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sf-text);
}

.page-about .ab-process__side {
  min-width: 0;
}

.page-about .ab-note {
  padding: 16px 18px;
  background: var(--sf-ice-deep);
  border: 1px solid rgba(111, 216, 255, 0.28);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
}

.page-about .ab-note__label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--sf-ice);
}

.page-about .ab-note__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .ab-note__list li {
  padding: 4px 12px;
  font-size: 13.5px;
  color: var(--sf-white);
  border: 1px solid rgba(111, 216, 255, 0.4);
  background: rgba(111, 216, 255, 0.08);
}

.page-about .ab-region {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .ab-region__text > p {
  margin: 0 0 20px;
  font-size: 15.5px;
  line-height: 1.84;
  color: var(--sf-text);
}

.page-about .ab-facts {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--sf-line);
  border: 1px solid var(--sf-line);
}

.page-about .ab-facts li {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 14px;
  padding: 12px 15px;
  background: var(--sf-panel);
}

.page-about .ab-facts__k {
  font-size: 14px;
  color: var(--sf-mist);
}

.page-about .ab-facts__v {
  font-family: var(--sf-font-mono);
  font-size: 14.5px;
  letter-spacing: 0.02em;
  color: var(--sf-neon);
}

.page-about .ab-region__extra {
  margin: 0 0 22px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--sf-mist);
}

.page-about .ab-region .ab-figure {
  margin-bottom: 0;
}

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

.page-about .ab-tag {
  position: relative;
  padding: 18px 20px;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
  transition: border-color 0.2s var(--sf-ease), transform 0.2s var(--sf-ease);
}

.page-about .ab-tag:hover {
  border-color: var(--sf-neon);
  transform: translateY(-3px);
}

.page-about .ab-tag__n {
  display: inline-block;
  margin-right: 12px;
  font-family: var(--sf-font-mono);
  font-size: 28px;
  line-height: 1;
  color: var(--sf-orange);
}

.page-about .ab-tag__name {
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--sf-white);
}

.page-about .ab-tag__role {
  display: block;
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(159, 173, 186, 0.6);
  transition: color 0.2s var(--sf-ease);
}

.page-about .ab-tag:hover .ab-tag__role {
  color: var(--sf-text);
}

.page-about .ab-miles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .ab-mile {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  padding: 20px 0;
  border-top: 1px solid var(--sf-line);
}

.page-about .ab-mile:last-child {
  border-bottom: 1px solid var(--sf-line);
}

.page-about .ab-mile__n {
  min-width: 62px;
  font-family: var(--sf-font-mono);
  font-size: 36px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--sf-ice);
}

.page-about .ab-mile__title {
  margin: 0 0 8px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.42;
  color: var(--sf-white);
}

.page-about .ab-mile__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sf-text);
}

.page-about .ab-cta {
  padding: 30px 22px;
  background: var(--sf-amber);
  border: 1px solid rgba(255, 122, 47, 0.3);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-about .ab-cta__title {
  margin: 0 0 20px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: clamp(20px, 4vw, 26px);
  line-height: 1.3;
  color: var(--sf-white);
}

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

.page-about .ab-cta__link {
  display: block;
  padding: 14px 16px;
  background: rgba(10, 13, 18, 0.6);
  border: 1px solid rgba(255, 122, 47, 0.35);
  text-decoration: none;
  transition: border-color 0.2s var(--sf-ease), background 0.2s var(--sf-ease);
}

.page-about .ab-cta__link:hover {
  border-color: var(--sf-neon);
  background: rgba(10, 13, 18, 0.85);
}

.page-about .ab-cta__link-k {
  display: block;
  margin-bottom: 6px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 15.5px;
  color: var(--sf-white);
}

.page-about .ab-cta__link-v {
  display: block;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--sf-mist);
}

.page-about .ab-aside {
  min-width: 0;
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-about .ab-toc {
  display: grid;
  gap: 2px;
  padding: 18px 18px 16px;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  border-top: 3px solid var(--sf-ice);
}

.page-about .ab-toc__title {
  margin: 0 0 12px;
  font-family: var(--sf-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--sf-ice);
}

.page-about .ab-toc .sf-toc__link {
  display: block;
  padding: 8px 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--sf-mist);
  text-decoration: none;
  border-bottom: 1px solid rgba(38, 49, 60, 0.7);
  transition: color 0.2s var(--sf-ease), padding-left 0.2s var(--sf-ease);
}

.page-about .ab-toc .sf-toc__link:last-child {
  border-bottom: 0;
}

.page-about .ab-toc .sf-toc__link:hover,
.page-about .ab-toc .sf-toc__link.is-active {
  color: var(--sf-neon);
  padding-left: 6px;
}

.page-about .ab-aside__card {
  padding: 18px;
  background: var(--sf-ink);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-about .ab-aside__card-title {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--sf-mist);
}

.page-about .ab-aside__stats {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-aside__stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--sf-line);
}

.page-about .ab-aside__stat:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .ab-aside__stat dt {
  font-size: 13.5px;
  color: var(--sf-mist);
}

.page-about .ab-aside__stat dd {
  margin: 0;
  font-family: var(--sf-font-mono);
  font-size: 20px;
  letter-spacing: 0.02em;
  color: var(--sf-neon);
}

@media (min-width: 700px) {
  .page-about .ab-cta {
    padding: 34px 28px;
  }

  .page-about .ab-cta__links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 940px) {
  .page-about .ab-hero {
    padding: calc(var(--sf-header-h) + 76px) 0 72px;
  }

  .page-about .ab-hero__inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(290px, 0.85fr);
    gap: 54px;
  }

  .page-about .ab-axis {
    padding-top: 62px;
    padding-bottom: 72px;
  }

  .page-about .ab-head {
    margin-bottom: 38px;
  }

  .page-about .ab-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .ab-role__head {
    flex-direction: column;
    gap: 8px;
  }

  .page-about .ab-role__body {
    padding-left: 18px;
  }

  .page-about .ab-process {
    grid-template-columns: minmax(0, 1.25fr) minmax(260px, 0.75fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .ab-region {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .ab-lower {
    padding-top: 64px;
    padding-bottom: 84px;
  }

  .page-about .ab-lower__grid {
    grid-template-columns: minmax(0, 1.95fr) minmax(250px, 0.85fr);
    gap: 52px;
  }

  .page-about .ab-aside {
    position: sticky;
    top: calc(var(--sf-header-h) + 26px);
  }
}

@media (min-width: 1160px) {
  .page-about .ab-tags {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-figure--team {
    max-width: 880px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-tag,
  .page-about .ab-cta__link,
  .page-about .ab-toc .sf-toc__link,
  .page-about .ab-node,
  .page-about .ab-role {
    transition: none;
  }

  .page-about .ab-tag:hover {
    transform: none;
  }
}

.page-about {
  --ab-cut: 16px;
  background: var(--sf-ink);
  color: var(--sf-text);
  font-family: var(--sf-font-body);
  overflow-x: hidden;
}

.page-about .ab-hero {
  position: relative;
  padding: calc(var(--sf-header-h) + 40px) 0 48px;
  overflow: hidden;
  background:
    radial-gradient(110% 80% at 8% 0%, rgba(198, 255, 61, 0.1), transparent 58%),
    radial-gradient(85% 75% at 96% 6%, rgba(111, 216, 255, 0.1), transparent 62%),
    var(--sf-ink);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(38, 49, 60, 0.55) 1px, transparent 1px),
    linear-gradient(90deg, rgba(38, 49, 60, 0.32) 1px, transparent 1px);
  background-size: 100% 68px, 68px 100%;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 82%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.85), transparent 82%);
}

.page-about .ab-hero::after {
  content: "";
  position: absolute;
  right: -70px;
  bottom: -120px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 122, 47, 0.14), transparent 68%);
  pointer-events: none;
}

.page-about .ab-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 34px;
  align-items: end;
}

.page-about .ab-crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--sf-mist);
}

.page-about .ab-crumbs a {
  color: var(--sf-ice);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--sf-ease);
}

.page-about .ab-crumbs a:hover {
  border-bottom-color: var(--sf-ice);
}

.page-about .ab-hero__eyebrow {
  margin: 0 0 16px;
}

.page-about .ab-hero__title {
  margin: 0 0 22px;
  font-family: var(--sf-font-display);
  font-weight: 900;
  font-size: clamp(34px, 8vw, 66px);
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--sf-white);
}

.page-about .ab-hero__lead {
  max-width: 62ch;
  margin: 0 0 30px;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--sf-text);
}

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

.page-about .ab-hero__panel {
  position: relative;
  padding: 22px 20px 20px;
  background: rgba(20, 26, 34, 0.86);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
}

.page-about .ab-hero__panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 46px;
  background: var(--sf-neon);
}

.page-about .ab-badges {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 16px 0;
}

.page-about .ab-badge {
  padding: 12px;
  background: var(--sf-ink);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%);
}

.page-about .ab-badge--wide {
  grid-column: 1 / -1;
}

.page-about .ab-badge__num {
  display: block;
  font-family: var(--sf-font-mono);
  font-size: 26px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--sf-neon);
}

.page-about .ab-badge--wide .ab-badge__num {
  color: var(--sf-orange);
}

.page-about .ab-badge__label {
  display: block;
  margin-top: 6px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--sf-mist);
}

.page-about .ab-hero__side-note {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--sf-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--sf-mist);
}

.page-about .ab-head {
  margin-bottom: 30px;
}

.page-about .ab-head__title {
  margin: 10px 0 12px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: clamp(25px, 5vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--sf-white);
}

.page-about .ab-head__note {
  max-width: 60ch;
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--sf-mist);
}

.page-about .ab-axis {
  padding-top: 44px;
  padding-bottom: 56px;
}

.page-about .ab-axis__track {
  position: relative;
  display: grid;
  gap: 16px;
  padding-left: 34px;
}

.page-about .ab-axis__track::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, var(--sf-neon), var(--sf-ice) 58%, rgba(111, 216, 255, 0));
}

.page-about .ab-node {
  position: relative;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
  transition: border-color 0.2s var(--sf-ease);
}

.page-about .ab-node:hover {
  border-color: rgba(198, 255, 61, 0.5);
}

.page-about .ab-node__dot {
  position: absolute;
  left: -33px;
  top: 22px;
  width: 16px;
  height: 16px;
  background: var(--sf-neon);
  clip-path: polygon(50% 0, 100% 50%, 50% 100%, 0 50%);
  transition: background 0.25s var(--sf-ease);
}

.page-about .ab-node[open] .ab-node__dot {
  background: var(--sf-orange);
}

.page-about .ab-node__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-node__head::-webkit-details-marker {
  display: none;
}

.page-about .ab-node__head::after {
  content: "";
  margin-left: auto;
  align-self: center;
  width: 9px;
  height: 9px;
  border-right: 2px solid var(--sf-mist);
  border-bottom: 2px solid var(--sf-mist);
  transform: rotate(45deg);
  transition: transform 0.25s var(--sf-ease);
}

.page-about .ab-node[open] .ab-node__head::after {
  transform: rotate(-135deg);
  border-color: var(--sf-neon);
}

.page-about .ab-node__no {
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--sf-ice);
}

.page-about .ab-node__year {
  padding: 2px 9px;
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--sf-ink);
  background: var(--sf-neon);
  clip-path: polygon(0 0, calc(100% - 7px) 0, 100% 7px, 100% 100%, 0 100%);
}

.page-about .ab-node__title {
  flex: 1 1 100%;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: clamp(18px, 3.6vw, 22px);
  line-height: 1.35;
  color: var(--sf-white);
}

.page-about .ab-node__body {
  padding: 0 20px 20px;
}

.page-about .ab-node__body p {
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.82;
  color: var(--sf-text);
}

.page-about .ab-node__meta {
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--sf-line);
  font-family: var(--sf-font-mono);
  font-size: 12.5px;
  letter-spacing: 0.03em;
  color: var(--sf-mist);
}

.page-about .ab-rule {
  position: relative;
  height: 68px;
  border-top: 1px solid var(--sf-line);
  border-bottom: 1px solid var(--sf-line);
  background-color: var(--sf-moss);
  background-image: repeating-linear-gradient(
    -45deg,
    rgba(198, 255, 61, 0.14) 0 6px,
    transparent 6px 20px
  );
}

.page-about .ab-rule::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 50%;
  height: 5px;
  transform: translateY(-50%) skewY(-0.8deg);
  background: linear-gradient(90deg, var(--sf-ice), var(--sf-neon) 46%, var(--sf-orange));
  opacity: 0.85;
}

.page-about .ab-lower {
  padding-top: 48px;
  padding-bottom: 64px;
}

.page-about .ab-lower__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.page-about .ab-col {
  min-width: 0;
}

.page-about .ab-block {
  padding-bottom: 44px;
  margin-bottom: 44px;
  border-bottom: 1px solid var(--sf-line);
}

.page-about .ab-block:last-of-type {
  padding-bottom: 8px;
  margin-bottom: 28px;
  border-bottom: 0;
}

.page-about .ab-figure {
  position: relative;
  margin: 0 0 26px;
  overflow: hidden;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 0 100%);
}

.page-about .ab-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.04);
}

.page-about .ab-figure::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 46%;
  background: linear-gradient(180deg, transparent, rgba(10, 13, 18, 0.82));
  pointer-events: none;
}

.page-about .ab-figure__tag {
  position: absolute;
  left: 14px;
  bottom: 12px;
  z-index: 1;
  padding: 4px 10px;
  font-family: var(--sf-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--sf-ice);
  background: rgba(18, 50, 64, 0.9);
  border: 1px solid rgba(111, 216, 255, 0.4);
}

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

.page-about .ab-role {
  background: var(--sf-ink);
  border: 1px solid var(--sf-line);
  border-left: 3px solid var(--sf-line);
  transition: border-left-color 0.2s var(--sf-ease), background 0.2s var(--sf-ease);
}

.page-about .ab-role[open] {
  border-left-color: var(--sf-neon);
  background: var(--sf-panel);
}

.page-about .ab-role__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
}

.page-about .ab-role__head::-webkit-details-marker {
  display: none;
}

.page-about .ab-role__num {
  min-width: 42px;
  font-family: var(--sf-font-mono);
  font-size: 24px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--sf-orange);
}

.page-about .ab-role__name {
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--sf-white);
}

.page-about .ab-role__body {
  padding: 0 18px 16px 58px;
}

.page-about .ab-role__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sf-text);
}

.page-about .ab-process {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

.page-about .ab-flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 20px;
}

.page-about .ab-flow__step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 18px 18px 16px;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
}

.page-about .ab-flow__n {
  padding-top: 3px;
  font-family: var(--sf-font-mono);
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--sf-neon);
}

.page-about .ab-flow__title {
  margin: 0 0 8px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.4;
  color: var(--sf-white);
}

.page-about .ab-flow__step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sf-text);
}

.page-about .ab-process__side {
  min-width: 0;
}

.page-about .ab-note {
  padding: 16px 18px;
  background: var(--sf-ice-deep);
  border: 1px solid rgba(111, 216, 255, 0.28);
  clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 0 100%);
}

.page-about .ab-note__label {
  display: block;
  margin-bottom: 10px;
  font-family: var(--sf-font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--sf-ice);
}

.page-about .ab-note__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-about .ab-note__list li {
  padding: 4px 12px;
  font-size: 13.5px;
  color: var(--sf-white);
  border: 1px solid rgba(111, 216, 255, 0.4);
  background: rgba(111, 216, 255, 0.08);
}

.page-about .ab-region {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
}

.page-about .ab-region__text > p {
  margin: 0 0 20px;
  font-size: 15.5px;
  line-height: 1.84;
  color: var(--sf-text);
}

.page-about .ab-facts {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--sf-line);
  border: 1px solid var(--sf-line);
}

.page-about .ab-facts li {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 6px 14px;
  padding: 12px 15px;
  background: var(--sf-panel);
}

.page-about .ab-facts__k {
  font-size: 14px;
  color: var(--sf-mist);
}

.page-about .ab-facts__v {
  font-family: var(--sf-font-mono);
  font-size: 14.5px;
  letter-spacing: 0.02em;
  color: var(--sf-neon);
}

.page-about .ab-region__extra {
  margin: 0 0 22px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--sf-mist);
}

.page-about .ab-region .ab-figure {
  margin-bottom: 0;
}

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

.page-about .ab-tag {
  position: relative;
  padding: 18px 20px;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - var(--ab-cut)) 0, 100% var(--ab-cut), 100% 100%, 0 100%);
  transition: border-color 0.2s var(--sf-ease), transform 0.2s var(--sf-ease);
}

.page-about .ab-tag:hover {
  border-color: var(--sf-neon);
  transform: translateY(-3px);
}

.page-about .ab-tag__n {
  display: inline-block;
  margin-right: 12px;
  font-family: var(--sf-font-mono);
  font-size: 28px;
  line-height: 1;
  color: var(--sf-orange);
}

.page-about .ab-tag__name {
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 17px;
  color: var(--sf-white);
}

.page-about .ab-tag__role {
  display: block;
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(159, 173, 186, 0.6);
  transition: color 0.2s var(--sf-ease);
}

.page-about .ab-tag:hover .ab-tag__role {
  color: var(--sf-text);
}

.page-about .ab-miles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .ab-mile {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 18px;
  padding: 20px 0;
  border-top: 1px solid var(--sf-line);
}

.page-about .ab-mile:last-child {
  border-bottom: 1px solid var(--sf-line);
}

.page-about .ab-mile__n {
  min-width: 62px;
  font-family: var(--sf-font-mono);
  font-size: 36px;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--sf-ice);
}

.page-about .ab-mile__title {
  margin: 0 0 8px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.42;
  color: var(--sf-white);
}

.page-about .ab-mile__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sf-text);
}

.page-about .ab-cta {
  padding: 30px 22px;
  background: var(--sf-amber);
  border: 1px solid rgba(255, 122, 47, 0.3);
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 0 100%);
}

.page-about .ab-cta__title {
  margin: 0 0 20px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: clamp(20px, 4vw, 26px);
  line-height: 1.3;
  color: var(--sf-white);
}

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

.page-about .ab-cta__link {
  display: block;
  padding: 14px 16px;
  background: rgba(10, 13, 18, 0.6);
  border: 1px solid rgba(255, 122, 47, 0.35);
  text-decoration: none;
  transition: border-color 0.2s var(--sf-ease), background 0.2s var(--sf-ease);
}

.page-about .ab-cta__link:hover {
  border-color: var(--sf-neon);
  background: rgba(10, 13, 18, 0.85);
}

.page-about .ab-cta__link-k {
  display: block;
  margin-bottom: 6px;
  font-family: var(--sf-font-display);
  font-weight: 800;
  font-size: 15.5px;
  color: var(--sf-white);
}

.page-about .ab-cta__link-v {
  display: block;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--sf-mist);
}

.page-about .ab-aside {
  min-width: 0;
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-about .ab-toc {
  display: grid;
  gap: 2px;
  padding: 18px 18px 16px;
  background: var(--sf-panel);
  border: 1px solid var(--sf-line);
  border-top: 3px solid var(--sf-ice);
}

.page-about .ab-toc__title {
  margin: 0 0 12px;
  font-family: var(--sf-font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--sf-ice);
}

.page-about .ab-toc .sf-toc__link {
  display: block;
  padding: 8px 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--sf-mist);
  text-decoration: none;
  border-bottom: 1px solid rgba(38, 49, 60, 0.7);
  transition: color 0.2s var(--sf-ease), padding-left 0.2s var(--sf-ease);
}

.page-about .ab-toc .sf-toc__link:last-child {
  border-bottom: 0;
}

.page-about .ab-toc .sf-toc__link:hover,
.page-about .ab-toc .sf-toc__link.is-active {
  color: var(--sf-neon);
  padding-left: 6px;
}

.page-about .ab-aside__card {
  padding: 18px;
  background: var(--sf-ink);
  border: 1px solid var(--sf-line);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-about .ab-aside__card-title {
  margin: 0 0 14px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--sf-mist);
}

.page-about .ab-aside__stats {
  margin: 0;
  display: grid;
  gap: 12px;
}

.page-about .ab-aside__stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 10px;
  border-bottom: 1px dashed var(--sf-line);
}

.page-about .ab-aside__stat:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-about .ab-aside__stat dt {
  font-size: 13.5px;
  color: var(--sf-mist);
}

.page-about .ab-aside__stat dd {
  margin: 0;
  font-family: var(--sf-font-mono);
  font-size: 20px;
  letter-spacing: 0.02em;
  color: var(--sf-neon);
}

@media (min-width: 700px) {
  .page-about .ab-cta {
    padding: 34px 28px;
  }

  .page-about .ab-cta__links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 940px) {
  .page-about .ab-hero {
    padding: calc(var(--sf-header-h) + 76px) 0 72px;
  }

  .page-about .ab-hero__inner {
    grid-template-columns: minmax(0, 1.55fr) minmax(290px, 0.85fr);
    gap: 54px;
  }

  .page-about .ab-axis {
    padding-top: 62px;
    padding-bottom: 72px;
  }

  .page-about .ab-head {
    margin-bottom: 38px;
  }

  .page-about .ab-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-about .ab-role__head {
    flex-direction: column;
    gap: 8px;
  }

  .page-about .ab-role__body {
    padding-left: 18px;
  }

  .page-about .ab-process {
    grid-template-columns: minmax(0, 1.25fr) minmax(260px, 0.75fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .ab-region {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .ab-lower {
    padding-top: 64px;
    padding-bottom: 84px;
  }

  .page-about .ab-lower__grid {
    grid-template-columns: minmax(0, 1.95fr) minmax(250px, 0.85fr);
    gap: 52px;
  }

  .page-about .ab-aside {
    position: sticky;
    top: calc(var(--sf-header-h) + 26px);
  }
}

@media (min-width: 1160px) {
  .page-about .ab-tags {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .ab-figure--team {
    max-width: 880px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .ab-tag,
  .page-about .ab-cta__link,
  .page-about .ab-toc .sf-toc__link,
  .page-about .ab-node,
  .page-about .ab-role {
    transition: none;
  }

  .page-about .ab-tag:hover {
    transform: none;
  }
}