.page-about {
  --about-body: rgba(243, 241, 231, .80);
  --about-line: rgba(185, 196, 198, .22);
  background: var(--bg);
  color: var(--fg);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-about .about-top {
  padding-top: clamp(84px, 14vw, 124px);
}

.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: .06em;
  color: var(--muted);
}

.page-about .breadcrumb a {
  color: var(--muted);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus-visible {
  color: var(--lime);
}

.page-about .breadcrumb [aria-current="page"] {
  color: var(--bone);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(22px, 4vw, 40px) clamp(32px, 6vw, 68px);
}

.page-about h1 {
  margin: 14px 0 0;
  font-size: var(--step-5);
  font-weight: 900;
  line-height: 1.06;
  letter-spacing: -.02em;
  max-width: 14em;
}

.page-about .about-lede {
  margin: clamp(18px, 3vw, 28px) 0 0;
  max-width: 32em;
  font-size: var(--step-1);
  line-height: 1.75;
  color: var(--about-body);
}

.page-about .about-meta {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px clamp(16px, 3vw, 32px);
  margin: clamp(28px, 5vw, 48px) 0 0;
  padding-top: clamp(18px, 3vw, 26px);
  border-top: 1px solid var(--line);
}

.page-about .about-meta-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}

.page-about .about-meta-label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--silver);
  opacity: .7;
}

.page-about .about-meta-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--step-2);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--lime);
  line-height: 1.1;
}

.page-about .about-meta-text {
  margin: 0;
  font-size: var(--step--1);
  color: var(--muted);
}

/* ---------- 纵向轴线 ---------- */
.page-about .about-thread {
  position: relative;
}

.page-about .about-thread::before {
  content: "";
  position: absolute;
  left: 13px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg,
      rgba(185, 196, 198, 0) 0%,
      var(--line-strong) 6%,
      var(--line-strong) 94%,
      rgba(185, 196, 198, 0) 100%);
}

.page-about .about-block {
  position: relative;
  padding-left: 40px;
  padding-block: clamp(30px, 5vw, 58px);
}

.page-about .about-node {
  position: absolute;
  left: 13px;
  top: clamp(34px, 5vw, 62px);
  width: 11px;
  height: 11px;
  background: var(--lime);
  border-radius: 2px;
  transform: translateX(-50%);
}

.page-about .about-copy {
  min-width: 0;
}

.page-about .about-copy h2 {
  margin: 10px 0 clamp(14px, 2vw, 20px);
  font-size: var(--step-3);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -.01em;
  max-width: 15em;
}

.page-about .about-copy p {
  margin: 0 0 1.1em;
  max-width: 33em;
  font-size: var(--step-0);
  line-height: 1.85;
  color: var(--about-body);
}

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

.page-about .about-visual {
  min-width: 0;
  margin-top: clamp(20px, 4vw, 0px);
}

.page-about .about-shot {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--ink-800);
}

.page-about .about-shot img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 权益索引卡 ---------- */
.page-about .about-panel-list {
  list-style: none;
  margin: 0;
  padding: clamp(18px, 3vw, 28px);
  display: grid;
  gap: 0;
  background: var(--glass);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(10px);
}

.page-about .about-panel-list li {
  display: grid;
  gap: 6px;
  padding-block: 14px;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-panel-list li:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-panel-list li:last-child {
  padding-bottom: 0;
}

.page-about .about-panel-key {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: .1em;
  color: var(--lime);
}

.page-about .about-panel-val {
  font-size: var(--step-0);
  line-height: 1.7;
  color: var(--about-body);
}

/* ---------- 团队标签 ---------- */
.page-about .about-tags {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: clamp(16px, 3vw, 24px) 0 0;
  padding: 0;
}

.page-about .about-tags li {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: .06em;
  padding: 8px 14px;
  color: var(--silver);
  background: rgba(14, 43, 36, .55);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  transition: color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.page-about .about-tags li:hover {
  color: var(--lime-soft);
  border-color: var(--lime);
  background: rgba(198, 242, 74, .12);
}

/* ---------- 年份带 ---------- */
.page-about .about-band {
  margin-block: clamp(32px, 6vw, 72px);
  padding-block: clamp(58px, 9vw, 110px);
  background-color: var(--ink-800);
  background-image:
    repeating-linear-gradient(90deg, rgba(185, 196, 198, .06) 0 1px, transparent 1px 92px),
    repeating-linear-gradient(0deg, rgba(185, 196, 198, .04) 0 1px, transparent 1px 92px);
  clip-path: polygon(0 2.2rem, 100% 0, 100% calc(100% - 2.2rem), 0 100%);
}

.page-about .about-band .lede {
  max-width: 34em;
  color: var(--muted);
}

.page-about .about-years {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
}

.page-about .about-year {
  display: grid;
  grid-template-columns: 4.8rem minmax(0, 1fr);
  gap: clamp(12px, 3vw, 30px);
  padding-block: clamp(18px, 3vw, 26px);
  border-top: 1px solid var(--line);
}

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

.page-about .about-year-num {
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 3.6vw, 1.55rem);
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--lime);
  line-height: 1.2;
}

.page-about .about-year-body {
  min-width: 0;
}

.page-about .about-year-body h3 {
  margin: 0 0 8px;
  font-size: var(--step-1);
  font-weight: 700;
  line-height: 1.4;
  color: var(--bone);
}

.page-about .about-year-body p {
  margin: 0;
  max-width: 42em;
  font-size: var(--step-0);
  line-height: 1.8;
  color: var(--about-body);
}

/* ---------- 覆盖范围 ---------- */
.page-about .about-coverage {
  max-width: none;
}

.page-about .about-coverage .about-shot {
  margin-top: clamp(20px, 4vw, 32px);
}

.page-about .about-coverage-grid {
  display: grid;
  gap: clamp(20px, 4vw, 36px);
  margin-top: clamp(22px, 4vw, 36px);
}

.page-about .about-dots {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 8px;
  max-width: 300px;
}

.page-about .about-dot {
  display: block;
  width: 100%;
  aspect-ratio: 1 / 1;
  border-radius: 3px;
  background: rgba(198, 242, 74, .13);
  border: 1px solid rgba(198, 242, 74, .38);
  transition: background var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.page-about .about-dot:nth-child(4n+1) {
  background: rgba(198, 242, 74, .24);
}

.page-about .about-dot:hover {
  background: var(--lime);
  transform: translateY(-2px);
}

.page-about .about-cover-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px 18px;
  margin: 0;
}

.page-about .about-cover-stat {
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(14, 43, 36, .5);
}

.page-about .about-cover-stat dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--silver);
  opacity: .78;
}

.page-about .about-cover-stat dd {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: var(--step-1);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--orange);
}

/* ---------- 合作与资质 ---------- */
.page-about .about-creds {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-creds li {
  display: grid;
  grid-template-columns: 3.4rem minmax(0, 1fr);
  align-items: center;
  gap: 14px;
  padding: 16px 18px;
  background: rgba(14, 43, 36, .55);
  border: 1px solid var(--line);
  border-left: 3px solid var(--clay);
  border-radius: var(--radius-md);
  transition: border-color var(--dur) var(--ease),
    transform var(--dur) var(--ease);
}

.page-about .about-creds li:hover {
  transform: translateY(-2px);
  border-left-color: var(--lime);
}

.page-about .about-cred-num {
  font-family: var(--font-mono);
  font-size: var(--step-1);
  font-weight: 700;
  letter-spacing: .03em;
  color: var(--lime);
}

.page-about .about-cred-text {
  font-size: var(--step-0);
  line-height: 1.6;
  color: var(--about-body);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  margin-top: clamp(40px, 7vw, 76px);
  padding-left: 40px;
}

.page-about .about-next h2 {
  margin: 0 0 clamp(14px, 3vw, 22px);
  font-size: var(--step-2);
  font-weight: 900;
  letter-spacing: -.01em;
}

.page-about .about-next-list {
  display: grid;
  gap: 0;
}

.page-about .about-next-link {
  display: grid;
  grid-template-columns: 2.4rem minmax(0, 1fr) auto;
  align-items: center;
  gap: 12px;
  padding: 17px 2px;
  border-top: 1px solid var(--line);
  color: var(--bone);
  text-decoration: none;
  transition: color var(--dur) var(--ease),
    border-color var(--dur) var(--ease),
    padding-left var(--dur) var(--ease);
}

.page-about .about-next-link:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-next-link:hover,
.page-about .about-next-link:focus-visible {
  color: var(--lime);
  border-color: rgba(198, 242, 74, .45);
  padding-left: 10px;
}

.page-about .about-next-num {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: .1em;
  color: var(--muted);
}

.page-about .about-next-label {
  font-size: var(--step-0);
  line-height: 1.6;
}

.page-about .about-next-arrow {
  font-family: var(--font-mono);
  font-size: var(--step-1);
  color: var(--orange);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-meta {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-coverage-grid {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    align-items: start;
  }

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

@media (min-width: 900px) {
  .page-about .about-thread::before {
    left: 50%;
  }

  .page-about .about-block {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: clamp(48px, 7vw, 112px);
    padding-left: 0;
    padding-block: clamp(44px, 5vw, 76px);
  }

  .page-about .about-node {
    left: 50%;
    top: clamp(46px, 5vw, 80px);
  }

  .page-about .about-block > .about-copy {
    grid-column: 1;
    grid-row: 1;
    align-self: center;
  }

  .page-about .about-block > .about-visual {
    grid-column: 2;
    grid-row: 1;
    align-self: center;
    margin-top: 0;
  }

  .page-about .about-block--flip > .about-copy {
    grid-column: 2;
  }

  .page-about .about-block--flip > .about-visual {
    grid-column: 1;
  }

  .page-about .about-block--single {
    display: block;
    max-width: 62rem;
    margin-inline: auto;
  }

  .page-about .about-block--single .about-copy {
    max-width: none;
  }

  .page-about .about-copy p {
    max-width: 30em;
  }

  .page-about .about-block--single .about-copy p {
    max-width: 38em;
  }

  .page-about .about-year {
    grid-template-columns: 7rem minmax(0, 1fr);
    align-items: baseline;
  }

  .page-about .about-next {
    padding-left: 0;
    max-width: 52rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-dot,
  .page-about .about-creds li,
  .page-about .about-next-link,
  .page-about .about-tags li {
    transition: none;
  }

  .page-about .about-dot:hover,
  .page-about .about-creds li:hover {
    transform: none;
  }
}
<<<END>>>