.page-about {
  --ab-rule: 1px solid var(--c-line);
  --ab-top: calc(var(--header-h) + 28px);
  padding-bottom: 72px;
}

/* ---------- 面包屑 ---------- */
.page-about .ab-crumb-wrap {
  padding-top: 22px;
}
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: var(--fs-1);
  color: var(--c-muted);
}
.page-about .breadcrumb a {
  color: var(--c-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}
.page-about .breadcrumb a:hover {
  color: var(--c-lime);
  border-bottom-color: var(--c-lime);
}
.page-about .breadcrumb span[aria-current] {
  color: var(--c-text);
}

/* ---------- 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: 28px 0 52px;
  border-bottom: var(--ab-rule);
  background:
    radial-gradient(120% 100% at 84% 0%, rgba(var(--rgb-lime), 0.1), transparent 58%),
    radial-gradient(90% 90% at 0% 100%, rgba(var(--rgb-blue), 0.1), transparent 60%);
}
.page-about .ab-hero-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: start;
}
.page-about .ab-hero h1 {
  margin: 12px 0 16px;
  font-family: var(--f-head);
  font-weight: 900;
  font-size: clamp(30px, 6vw, 50px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  color: var(--c-text);
}
.page-about .ab-lede {
  max-width: 62ch;
  margin: 0 0 26px;
  font-size: var(--fs-2);
  line-height: 1.8;
  color: var(--c-muted);
}
.page-about .ab-hero-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
  background: var(--c-line);
  border: var(--ab-rule);
}
.page-about .ab-hero-facts li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  background: rgba(20, 20, 51, 0.78);
}
.page-about .ab-fact-num {
  font-family: var(--f-mono);
  font-size: var(--fs-4);
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-lime);
}
.page-about .ab-fact-label {
  font-size: var(--fs-1);
  color: var(--c-muted);
}
.page-about .ab-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .ab-hero-visual {
  position: relative;
  min-height: 240px;
  padding: 22px;
  border: var(--ab-rule);
  background-image:
    repeating-linear-gradient(90deg, transparent 0 27px, rgba(42, 42, 77, 0.55) 27px 28px),
    repeating-linear-gradient(0deg, transparent 0 27px, rgba(42, 42, 77, 0.55) 27px 28px),
    linear-gradient(160deg, #141433 0%, #0e2a33 100%);
  display: flex;
  align-items: center;
  overflow: hidden;
}
.page-about .ab-visual-card {
  width: 100%;
  padding: 20px;
  background: rgba(11, 10, 31, 0.84);
  border: 1px solid var(--c-line);
  box-shadow: var(--ink-shadow);
}
.page-about .ab-visual-kicker {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-lime);
}
.page-about .ab-sync {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-sync li {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--c-line);
}
.page-about .ab-sync li:last-child {
  border-bottom: 0;
}
.page-about .ab-sync-t {
  font-size: var(--fs-1);
  color: var(--c-text);
}
.page-about .ab-sync-bar {
  display: block;
  height: 6px;
  border-radius: 1px;
  background: var(--c-lime);
}
.page-about .ab-sync-bar--1 {
  width: 78%;
}
.page-about .ab-sync-bar--2 {
  width: 56%;
  background: var(--c-blue);
}
.page-about .ab-sync-bar--3 {
  width: 92%;
  background: var(--c-gold);
}
.page-about .ab-visual-foot {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-muted);
}

/* ---------- 三级布局 ---------- */
.page-about .ab-layout {
  display: grid;
  grid-template-columns: 1fr;
  grid-template-areas:
    "toc"
    "body"
    "aside";
  gap: 34px;
  padding-top: 40px;
}
.page-about .ab-toc {
  grid-area: toc;
  min-width: 0;
}
.page-about .ab-body {
  grid-area: body;
  min-width: 0;
}
.page-about .ab-aside {
  grid-area: aside;
  display: grid;
  gap: 16px;
  min-width: 0;
}

/* 章节目录 */
.page-about .ab-toc-title {
  margin: 0 0 10px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-muted);
}
.page-about .ab-toc-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 16px;
  padding: 0;
  list-style: none;
}
.page-about .ab-toc-link {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 7px 10px;
  font-size: var(--fs-1);
  color: var(--c-muted);
  text-decoration: none;
  border: 1px solid var(--c-line);
  transition: color 0.16s var(--ease), background-color 0.16s var(--ease), border-color 0.16s var(--ease);
}
.page-about .ab-toc-link:hover {
  color: var(--c-lime);
  border-color: rgba(var(--rgb-lime), 0.45);
  background: rgba(var(--rgb-lime), 0.06);
}
.page-about .ab-toc-num {
  font-family: var(--f-mono);
  font-size: 11px;
  color: var(--c-line);
}
.page-about .ab-toc-link:hover .ab-toc-num {
  color: var(--c-lime);
}
.page-about .ab-toc-note {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--c-line);
  font-size: 12px;
  line-height: 1.7;
  color: var(--c-muted);
}

/* 正文章节 */
.page-about .ab-chapter {
  padding-bottom: 42px;
  margin-bottom: 42px;
  border-bottom: var(--ab-rule);
  scroll-margin-top: var(--ab-top);
}
.page-about .ab-chapter:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}
.page-about .ab-chapter-head {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  margin-bottom: 18px;
}
.page-about .chapter-no {
  padding-top: 7px;
  font-family: var(--f-mono);
  font-size: 15px;
  line-height: 1.2;
  letter-spacing: 0.04em;
  color: var(--c-lime);
}
.page-about .ab-chapter-head h2 {
  margin: 0;
  font-family: var(--f-head);
  font-weight: 900;
  font-size: clamp(22px, 3.4vw, 30px);
  line-height: 1.26;
  color: var(--c-text);
}

.page-about .prose {
  max-width: 68ch;
  font-size: var(--fs-2);
  line-height: 1.78;
  color: var(--c-text);
}
.page-about .prose p {
  margin: 0 0 16px;
}
.page-about .prose p:last-child {
  margin-bottom: 0;
}
.page-about .ab-body .prose a {
  color: var(--c-lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(var(--rgb-lime), 0.4);
  transition: border-color 0.16s var(--ease);
}
.page-about .ab-body .prose a:hover {
  border-bottom-color: var(--c-lime);
}

/* 旁注卡 */
.page-about .ab-note {
  position: relative;
  margin: 20px 0 0;
  padding: 16px 16px 16px 18px;
  border: var(--ab-rule);
  background: rgba(20, 20, 51, 0.7);
}
.page-about .ab-note::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--c-blue);
}
.page-about .ab-note--data::before {
  background: var(--c-lime);
}
.page-about .ab-note--jump::before {
  background: var(--c-gold);
}
.page-about .ab-note-tag {
  display: inline-block;
  margin-bottom: 8px;
  padding: 2px 7px;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--c-blue);
  border: 1px solid currentColor;
}
.page-about .ab-note--data .ab-note-tag {
  color: var(--c-lime);
}
.page-about .ab-note--jump .ab-note-tag {
  color: var(--c-gold);
}
.page-about .ab-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--c-muted);
}
.page-about .ab-note a {
  color: var(--c-text);
  text-decoration: none;
  border-bottom: 1px solid var(--c-line);
}
.page-about .ab-note a:hover {
  color: var(--c-lime);
  border-bottom-color: var(--c-lime);
}

/* 图表与图 */
.page-about .figure {
  margin: 24px 0;
}
.page-about .figure-media {
  display: block;
  overflow: hidden;
  border: var(--ab-rule);
  background: var(--c-panel);
}
.page-about .figure-media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-about .figure--angle {
  transform: rotate(-1.1deg);
  margin: 28px 0 32px;
}
.page-about .figure-caption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.68;
  color: var(--c-muted);
}
.page-about .ab-caliber-figure {
  margin-top: 4px;
}

/* SVG 判定流程图 */
.page-about .ab-flow-wrap {
  margin: 24px 0;
  padding: 16px;
  border: var(--ab-rule);
  background: rgba(20, 20, 51, 0.5);
}
.page-about .ab-flow {
  display: block;
  width: 100%;
  height: auto;
}
.page-about .ab-fbox {
  fill: #141433;
  stroke: #2a2a4d;
  stroke-width: 1;
}
.page-about .ab-fbox--out {
  fill: rgba(198, 255, 61, 0.07);
  stroke: rgba(198, 255, 61, 0.4);
}
.page-about .ab-fline {
  fill: none;
  stroke: #2a2a4d;
  stroke-width: 1.5;
}
.page-about .ab-fline--dash {
  stroke-dasharray: 5 5;
}
.page-about .ab-fk {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
}
.page-about .ab-fk--gpu {
  fill: #ff9f1c;
}
.page-about .ab-fk--ram {
  fill: #3da9fc;
}
.page-about .ab-fk--ssd {
  fill: #ff3d8b;
}
.page-about .ab-fv {
  font-family: var(--f-head);
  font-size: 15px;
  fill: #e8e9f3;
}
.page-about .ab-fv--out {
  font-size: 14px;
}
.page-about .ab-fv--wine {
  font-size: 14px;
}

/* 折叠面板 */
.page-about .ab-cal-disclosure {
  margin-top: 10px;
}
.page-about .ab-cal-disclosure .disclosure-btn {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  width: 100%;
  padding: 12px 14px;
  text-align: left;
  font-family: var(--f-mono);
  font-size: 14px;
  color: var(--c-text);
  background: rgba(20, 20, 51, 0.62);
  border: var(--ab-rule);
  cursor: pointer;
  transition: border-color 0.16s var(--ease), color 0.16s var(--ease);
}
.page-about .ab-cal-disclosure .disclosure-btn:hover {
  border-color: rgba(var(--rgb-lime), 0.45);
  color: var(--c-lime);
}
.page-about .ab-cal-disclosure .disclosure-panel {
  padding: 14px 16px;
  font-size: 14px;
  line-height: 1.74;
  color: var(--c-muted);
  border: var(--ab-rule);
  border-top: 0;
  background: rgba(11, 10, 31, 0.5);
}
.page-about .ab-cal-disclosure .disclosure-panel p {
  margin: 0;
}
.page-about .ab-cal-disclosure .disclosure-panel a {
  color: var(--c-lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(var(--rgb-lime), 0.4);
}

/* 数据表 */
.page-about .ab-table-wrap {
  margin: 22px 0;
  overflow-x: auto;
}
.page-about .ab-table-caption {
  caption-side: top;
  text-align: left;
  padding-bottom: 10px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-muted);
}
.page-about .data-table {
  width: 100%;
  min-width: 480px;
  border-collapse: collapse;
  font-size: 14px;
}
.page-about .data-table th,
.page-about .data-table td {
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--c-line);
}
.page-about .data-table thead th {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--c-muted);
  border-bottom-color: var(--c-muted);
}
.page-about .data-table tbody th {
  font-weight: 600;
  color: var(--c-text);
  white-space: nowrap;
}
.page-about .data-table tbody td {
  color: var(--c-muted);
}
.page-about .data-table .num {
  font-family: var(--f-mono);
  color: var(--c-text);
}

/* 团队 */
.page-about .ab-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 22px;
}
.page-about .ab-roles {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-about .ab-role {
  position: relative;
  padding: 14px 16px 14px 18px;
  border: var(--ab-rule);
  background: rgba(20, 20, 51, 0.58);
}
.page-about .ab-role::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--c-amber);
}
.page-about .ab-role--ram::before {
  background: var(--c-blue);
}
.page-about .ab-role--gift::before {
  background: var(--c-gold);
}
.page-about .ab-role--play::before {
  background: var(--c-lime);
}
.page-about .ab-role h3 {
  margin: 0 0 6px;
  font-size: var(--fs-2);
  font-weight: 700;
  color: var(--c-text);
}
.page-about .ab-role p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-muted);
}
.page-about .ab-team-figure {
  margin: 0;
}

/* 时间线 */
.page-about .ab-timeline {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  border-left: 2px solid var(--c-line);
  margin-left: 6px;
}
.page-about .ab-timeline > li {
  position: relative;
  padding: 0 0 18px 22px;
}
.page-about .ab-timeline > li:last-child {
  padding-bottom: 0;
}
.page-about .ab-timeline > li::before {
  content: "";
  position: absolute;
  top: 12px;
  left: -7px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--c-night);
  border: 2px solid var(--c-lime);
}
.page-about .ab-stage-btn {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr) 18px;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 8px 0;
  text-align: left;
  font-family: var(--f-head);
  color: var(--c-text);
  background: none;
  border: 0;
  cursor: pointer;
}
.page-about .ab-stage-year {
  font-size: 14px;
  color: var(--c-lime);
}
.page-about .ab-stage-name {
  font-size: var(--fs-2);
  font-weight: 700;
  line-height: 1.45;
}
.page-about .ab-stage-btn:hover .ab-stage-name {
  color: var(--c-lime);
}
.page-about .ab-timeline .disclosure-panel {
  padding: 0 0 6px;
  font-size: 14px;
  line-height: 1.74;
  color: var(--c-muted);
}
.page-about .ab-timeline .disclosure-panel p {
  margin: 0;
  max-width: 62ch;
}

/* 联系方式 */
.page-about .ab-contact-list {
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--c-line);
  border: var(--ab-rule);
}
.page-about .ab-contact-item {
  display: grid;
  grid-template-columns: 82px minmax(0, 1fr) auto;
  align-items: center;
  gap: 10px;
  padding: 12px 14px;
  background: rgba(20, 20, 51, 0.7);
}
.page-about .ab-contact-key {
  font-size: 13px;
  color: var(--c-muted);
}
.page-about .ab-contact-value {
  font-size: 14px;
  color: var(--c-text);
  word-break: break-all;
}
.page-about .ab-copy {
  align-self: center;
}

/* 侧栏卡 */
.page-about .ab-side-card {
  padding: 16px 18px;
  border: var(--ab-rule);
  background: rgba(20, 20, 51, 0.62);
}
.page-about .ab-side-title {
  margin: 0 0 10px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-muted);
}
.page-about .ab-side-card ul {
  margin: 0;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--c-muted);
}
.page-about .ab-side-card li {
  margin-bottom: 6px;
}
.page-about .ab-side-card li:last-child {
  margin-bottom: 0;
}
.page-about .ab-side-card a {
  color: var(--c-text);
  text-decoration: none;
  border-bottom: 1px solid var(--c-line);
}
.page-about .ab-side-card a:hover {
  color: var(--c-lime);
  border-bottom-color: var(--c-lime);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .ab-hero-facts {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .ab-chapter-head {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 18px;
  }
}

@media (min-width: 760px) {
  .page-about .ab-team {
    grid-template-columns: minmax(0, 1.65fr) minmax(0, 1fr);
    align-items: start;
  }
  .page-about .ab-contact-item {
    grid-template-columns: 96px minmax(0, 1fr) auto;
  }
}

@media (min-width: 960px) {
  .page-about .ab-hero {
    padding: 36px 0 64px;
  }
  .page-about .ab-hero-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
  }
  .page-about .ab-hero-visual {
    min-height: 320px;
  }
}

@media (min-width: 1040px) {
  .page-about .ab-layout {
    grid-template-columns: 208px minmax(0, 1fr) 240px;
    grid-template-areas: "toc .page-about aside";
    gap: 46px;
    align-items: start;
  }
  .page-about .ab-toc,
  .page-about .ab-aside {
    position: sticky;
    top: var(--ab-top);
    align-self: start;
  }
  .page-about .ab-toc-list {
    display: block;
    margin-bottom: 14px;
  }
  .page-about .ab-toc-list li {
    border-bottom: 1px solid var(--c-line);
  }
  .page-about .ab-toc-list li:first-child {
    border-top: 1px solid var(--c-line);
  }
  .page-about .ab-toc-link {
    padding: 9px 2px;
    border: 0;
    background: none;
  }
  .page-about .ab-toc-link:hover {
    background: none;
  }
  .page-about .ab-aside {
    gap: 18px;
  }
}
<<<END>>>