.page-about {
  --ab-maxw: 100%;
  --ab-gap: clamp(24px, 5vw, 72px);
  --ab-soft-edge: 1px solid rgba(34, 64, 95, 0.5);
  position: relative;
  overflow-x: clip;
  background: var(--void-black);
  color: var(--chalk-white);
  font-family: var(--font-sans);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

.page-about .ab-path {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: clamp(28px, 4vw, 48px);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--mist-grey);
}

.page-about .ab-path a {
  color: var(--mist-grey);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .ab-path a:hover {
  color: var(--chalk-white);
  border-bottom-color: var(--signal-orange);
}

.page-about .ab-path-now {
  color: var(--chalk-white);
}

.page-about .ab-path-sep {
  color: var(--line-blue);
}

.page-about a:focus-visible,
.page-about .ab-year:focus-visible {
  outline: 2px solid var(--signal-orange);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ---------- 栅格骨架 ---------- */
.page-about .ab-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3.5vw, 34px);
}

.page-about .ab-rail {
  position: relative;
  padding: 2px 0 2px 18px;
  border-left: 2px solid rgba(23, 208, 138, 0.85);
}

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

@media (min-width: 900px) {
  .page-about .ab-grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 8fr);
    column-gap: clamp(32px, 5vw, var(--ab-gap));
  }
}

/* ---------- 章节标题体系 ---------- */
.page-about .ab-h2 {
  margin: 0 0 clamp(18px, 2.4vw, 26px);
  font-size: clamp(22px, 3vw, 36px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--chalk-white);
}

.page-about .ab-h2::after {
  content: "";
  display: block;
  width: 56px;
  height: 2px;
  margin-top: 16px;
  background: linear-gradient(90deg, var(--track-green), var(--signal-orange));
}

.page-about .ab-stamp {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist-grey);
  max-width: 22ch;
}

.page-about .ab-rail-note {
  margin-top: 20px;
}

.page-about .ab-rail-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--signal-orange);
  line-height: 1;
}

.page-about .ab-rail-cap {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist-grey);
  max-width: 22ch;
}

.page-about .prose {
  max-width: 42ch;
}

.page-about .prose p {
  margin: 0 0 1.1em;
  font-size: 16px;
  color: rgba(242, 246, 255, 0.86);
}

.page-about .prose p:last-child {
  margin-bottom: 0;
}

.page-about .ab-body {
  margin: 1.1em 0 0;
  font-size: 16px;
  color: rgba(242, 246, 255, 0.8);
  max-width: 42ch;
}

/* ---------- 01 首屏 ---------- */
.page-about .ab-hero {
  position: relative;
  padding: calc(var(--header-h) + 40px) 0 clamp(48px, 7vw, 96px);
  background:
    radial-gradient(110% 82% at 84% -12%, rgba(11, 59, 46, 0.92) 0%, rgba(11, 59, 46, 0) 62%),
    radial-gradient(78% 60% at 0% 112%, rgba(255, 90, 31, 0.14) 0%, rgba(255, 90, 31, 0) 66%),
    linear-gradient(180deg, var(--void-black) 0%, var(--deep-space) 74%, var(--deep-space) 100%);
  border-bottom: var(--edge);
}

.page-about .ab-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    100deg,
    rgba(242, 246, 255, 0.05) 0 1px,
    transparent 1px 28px
  );
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 76%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.9), transparent 76%);
}

.page-about .ab-hero > .shell {
  position: relative;
  z-index: 1;
}

.page-about .ab-hero h1 {
  margin: 0 0 clamp(18px, 2.4vw, 26px);
  font-size: clamp(30px, 5.4vw, 66px);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.025em;
  color: var(--chalk-white);
  max-width: 20ch;
}

.page-about .ab-hero .lede {
  margin: 0;
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.75;
  color: rgba(242, 246, 255, 0.88);
  max-width: 40ch;
}

.page-about .ab-hero-figure {
  margin: clamp(38px, 6vw, 76px) 0 0;
}

.page-about .ab-hero-figure .figure-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: var(--edge);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(90% 90% at 22% 20%, rgba(23, 208, 138, 0.24), transparent 62%),
    linear-gradient(140deg, rgba(18, 34, 56, 0.9), rgba(5, 8, 15, 0.95) 58%, rgba(255, 90, 31, 0.18));
}

.page-about .ab-hero-figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

@media (min-width: 900px) {
  .page-about .ab-hero-figure {
    width: min(100%, 940px);
    margin-left: auto;
  }
}

/* ---------- 章节通用 ---------- */
.page-about .ab-section {
  position: relative;
  padding: clamp(56px, 8vw, 108px) 0;
}

.page-about .ab-cut {
  height: 2px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--track-green) 16%,
    var(--signal-orange) 62%,
    transparent 100%
  );
  opacity: 0.5;
  transform: rotate(-0.6deg);
  transform-origin: left center;
}

.page-about .ab-cut--flip {
  transform: rotate(0.6deg);
  transform-origin: right center;
}

/* ---------- 02 数据能力 ---------- */
.page-about .ab-data {
  background:
    radial-gradient(130% 96% at 10% -6%, rgba(11, 59, 46, 0.95) 0%, rgba(11, 59, 46, 0) 72%),
    var(--deep-space);
  border-bottom: var(--edge);
}

.page-about .ab-src-list {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--soft-edge);
  border: var(--edge);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .ab-src-item {
  display: grid;
  grid-template-columns: 74px minmax(0, 1fr);
  align-items: baseline;
  gap: clamp(14px, 2vw, 24px);
  padding: clamp(16px, 2.2vw, 22px) clamp(16px, 2.4vw, 26px);
  background: rgba(5, 8, 15, 0.62);
  transition: background 0.25s ease;
}

.page-about .ab-src-item:hover {
  background: rgba(11, 59, 46, 0.42);
}

.page-about .ab-src-k {
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 700;
  line-height: 1;
  color: var(--track-green);
  letter-spacing: -0.02em;
}

.page-about .ab-src-t {
  font-size: 15px;
  line-height: 1.7;
  color: rgba(242, 246, 255, 0.82);
}

.page-about .ab-data-figure {
  margin: clamp(36px, 5vw, 68px) 0 0;
}

.page-about .ab-data-figure .figure-frame {
  overflow: hidden;
  aspect-ratio: 4 / 3;
  border: var(--edge);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(70% 70% at 50% 50%, rgba(23, 208, 138, 0.2), transparent 70%),
    linear-gradient(160deg, rgba(18, 34, 56, 0.92), rgba(5, 8, 15, 0.96));
}

.page-about .ab-data-figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

@media (min-width: 900px) {
  .page-about .ab-data-figure {
    margin-left: 27.3%;
    max-width: 72.7%;
  }
}

/* ---------- 03 团队构成 ---------- */
.page-about .ab-team {
  background: linear-gradient(180deg, var(--deep-space) 0%, #0C1A30 52%, var(--deep-space) 100%);
}

.page-about .ab-stack {
  display: flex;
  width: 100%;
  height: 10px;
  margin: clamp(28px, 4vw, 42px) 0 clamp(20px, 3vw, 30px);
  border-radius: 999px;
  overflow: hidden;
  background: rgba(34, 64, 95, 0.35);
}

.page-about .ab-seg {
  display: block;
  height: 100%;
  transition: opacity 0.25s ease;
}

.page-about .ab-seg-a {
  width: 38.2%;
  background: linear-gradient(90deg, var(--track-green), #10A56E);
}

.page-about .ab-seg-b {
  width: 26.5%;
  background: linear-gradient(90deg, var(--live-cyan), #1E9FB5);
}

.page-about .ab-seg-c {
  width: 35.3%;
  background: linear-gradient(90deg, var(--signal-orange), var(--orange-glow));
}

.page-about .ab-team-rows {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--soft-edge);
  border: var(--edge);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .ab-team-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas:
    "key num"
    "desc desc";
  align-items: baseline;
  gap: 6px 16px;
  padding: clamp(15px, 2vw, 21px) clamp(16px, 2.4vw, 26px);
  background: rgba(5, 8, 15, 0.55);
  transition: background 0.25s ease;
}

.page-about .ab-team-row:hover,
.page-about .ab-team-row:focus-within {
  background: rgba(18, 34, 56, 0.85);
}

.page-about .ab-team-key {
  grid-area: key;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 600;
  color: var(--chalk-white);
}

.page-about .ab-team-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex: none;
}

.page-about .ab-dot-a { background: var(--track-green); }
.page-about .ab-dot-b { background: var(--live-cyan); }
.page-about .ab-dot-c { background: var(--signal-orange); }

.page-about .ab-team-num {
  grid-area: num;
  font-family: var(--font-mono);
  font-size: clamp(20px, 2.6vw, 26px);
  font-weight: 700;
  line-height: 1;
  color: var(--signal-orange);
}

.page-about .ab-team-desc {
  grid-area: desc;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist-grey);
}

@media (min-width: 700px) {
  .page-about .ab-team-row {
    grid-template-columns: minmax(0, 1fr) minmax(0, 2.4fr) auto;
    grid-template-areas: "key desc num";
    align-items: center;
    gap: clamp(16px, 2.4vw, 32px);
  }
}

/* ---------- 04 发展历程 ---------- */
.page-about .ab-timeline {
  background:
    radial-gradient(100% 60% at 88% 4%, rgba(23, 208, 138, 0.12) 0%, rgba(23, 208, 138, 0) 68%),
    var(--void-black);
}

@media (min-width: 900px) {
  .page-about .ab-sticky {
    position: sticky;
    top: calc(var(--header-h) + 28px);
    align-self: start;
  }
}

.page-about .ab-years {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
}

@media (min-width: 900px) {
  .page-about .ab-years {
    flex-direction: column;
    gap: 6px;
  }
}

.page-about .ab-year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--mist-grey);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.page-about .ab-year:hover {
  color: var(--track-green);
  border-bottom-color: rgba(23, 208, 138, 0.6);
  transform: translateX(3px);
}

.page-about .ab-tl {
  list-style: none;
  margin: 0;
  padding: 0 0 0 clamp(20px, 3vw, 32px);
  position: relative;
}

.page-about .ab-tl::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--track-green), rgba(34, 64, 95, 0.5) 70%, transparent);
}

.page-about .ab-tl-item {
  position: relative;
  padding: 0 0 clamp(38px, 5vw, 62px);
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .ab-tl-item:last-child {
  padding-bottom: 0;
}

.page-about .ab-tl-item::before {
  content: "";
  position: absolute;
  left: calc(-1 * clamp(20px, 3vw, 32px) - 2px);
  top: 9px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--void-black);
  border: 2px solid var(--track-green);
  box-shadow: 0 0 0 4px rgba(23, 208, 138, 0.12);
}

.page-about .ab-tl-item:target::before {
  background: var(--signal-orange);
  border-color: var(--signal-orange);
  box-shadow: 0 0 0 6px rgba(255, 90, 31, 0.18);
}

.page-about .ab-tl-year {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 3vw, 32px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--signal-orange);
  margin-bottom: 10px;
}

.page-about .ab-tl-title {
  margin: 0 0 10px;
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--chalk-white);
}

.page-about .ab-tl-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(242, 246, 255, 0.78);
  max-width: 46ch;
}

.page-about .ab-tl-figure {
  margin: clamp(36px, 5vw, 64px) 0 0;
}

.page-about .ab-frame-wide {
  overflow: hidden;
  aspect-ratio: 2 / 1;
  border: var(--edge);
  border-radius: var(--radius-lg);
  background:
    linear-gradient(120deg, rgba(11, 59, 46, 0.55), rgba(5, 8, 15, 0.92) 55%, rgba(255, 90, 31, 0.14));
}

.page-about .ab-frame-wide img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 05 服务范围 ---------- */
.page-about .ab-proof {
  background:
    radial-gradient(90% 70% at 8% 0%, rgba(255, 90, 31, 0.1) 0%, rgba(255, 90, 31, 0) 70%),
    var(--deep-space);
  border-top: var(--edge);
  border-bottom: var(--edge);
}

.page-about .ab-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(30px, 4vw, 46px) 0 0;
  background: var(--soft-edge);
  border: var(--edge);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .ab-stat {
  padding: clamp(18px, 2.4vw, 26px) clamp(16px, 2.2vw, 24px);
  background: rgba(5, 8, 15, 0.6);
}

.page-about .ab-stat-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--signal-orange);
}

.page-about .ab-stat-num small {
  font-size: 0.44em;
  font-weight: 700;
  letter-spacing: 0;
  color: var(--orange-glow);
}

.page-about .ab-stat-label {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist-grey);
}

@media (min-width: 760px) {
  .page-about .ab-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .ab-prose-tight {
  margin-top: clamp(26px, 3.6vw, 38px);
}

.page-about .ab-inline-link {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
  margin: clamp(28px, 4vw, 42px) 0 0;
}

.page-about .ab-text-link {
  font-size: 14px;
  color: var(--mist-grey);
  text-decoration: none;
  border-bottom: 1px solid rgba(147, 164, 191, 0.45);
  padding-bottom: 2px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .ab-text-link:hover {
  color: var(--chalk-white);
  border-bottom-color: var(--signal-orange);
}

/* ---------- 06 合作与沟通 ---------- */
.page-about .ab-partner {
  background:
    radial-gradient(120% 88% at 92% 100%, rgba(11, 59, 46, 0.85) 0%, rgba(11, 59, 46, 0) 66%),
    var(--void-black);
  padding-bottom: clamp(72px, 10vw, 132px);
}

.page-about .ab-channels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: clamp(28px, 4vw, 42px) 0 0;
  background: var(--soft-edge);
  border: var(--edge);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .ab-channel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: clamp(15px, 2vw, 20px) clamp(16px, 2.4vw, 26px);
  background: rgba(5, 8, 15, 0.6);
  transition: background 0.25s ease;
}

.page-about .ab-channel:hover {
  background: rgba(18, 34, 56, 0.88);
}

.page-about .ab-channel dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--mist-grey);
}

.page-about .ab-channel dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--chalk-white);
  word-break: break-word;
}

.page-about .ab-channel dd a {
  color: var(--chalk-white);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 90, 31, 0.55);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .ab-channel dd a:hover {
  color: var(--orange-glow);
  border-bottom-color: var(--orange-glow);
}

@media (min-width: 720px) {
  .page-about .ab-channels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}
<<<END>>>

.page-about {
  --soft-edge: transparent;
}