.page-about {
  --about-rail: 108px;
  --about-body-ink: #4A3E34;
  --about-hair: rgba(27, 21, 18, .14);
  position: relative;
  background: var(--c-deep);
}

/* ---------- 首屏 ---------- */

.page-about .about-masthead {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 40px) 0 48px;
  background:
    radial-gradient(120% 100% at 8% -12%, rgba(42, 27, 74, .92), transparent 60%),
    radial-gradient(80% 70% at 96% 4%, rgba(61, 255, 158, .14), transparent 62%),
    var(--c-deep);
}

.page-about .about-masthead::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--c-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-grid) 1px, transparent 1px);
  background-size: 120px 120px;
  opacity: .4;
  pointer-events: none;
}

.page-about .about-masthead::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(0deg, rgba(255, 255, 255, .022) 0 1px, transparent 1px 3px);
  pointer-events: none;
}

.page-about .about-masthead .shell {
  position: relative;
  z-index: 1;
}

.page-about .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--c-mist);
}

.page-about .breadcrumbs a {
  color: var(--c-mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}

.page-about .breadcrumbs a:hover,
.page-about .breadcrumbs a:focus-visible {
  color: var(--c-neon);
  border-bottom-color: var(--c-neon);
}

.page-about .breadcrumbs [aria-current="page"] {
  color: var(--c-cream);
}

.page-about .about-crumb-sep {
  color: var(--c-grid);
}

.page-about .about-masthead__grid {
  display: grid;
  gap: 36px;
  margin-top: 30px;
}

.page-about .about-masthead .kicker {
  display: inline-block;
  margin: 0;
  padding: 5px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--c-orange);
  border: 1px solid rgba(255, 90, 43, .45);
  background: rgba(255, 90, 43, .08);
  clip-path: var(--clip-cut-sm);
}

.page-about .about-masthead h1 {
  margin: 18px 0 18px;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(32px, 7.2vw, 66px);
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--c-cream);
}

.page-about .about-masthead .lede {
  margin: 0;
  max-width: 34em;
  font-size: clamp(15px, 2.2vw, 17px);
  line-height: 1.78;
  color: var(--c-mist);
}

.page-about .about-masthead__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-about .about-masthead__panel {
  position: relative;
  width: 100%;
  max-width: 400px;
  aspect-ratio: 1 / 1;
  margin-inline: auto;
  display: grid;
  place-items: center;
  overflow: hidden;
  background: linear-gradient(150deg, rgba(18, 48, 85, .72), rgba(42, 27, 74, .5));
  border: 1px solid var(--c-grid);
  clip-path: var(--clip-cut);
}

.page-about .about-orbit {
  position: relative;
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
}

.page-about .about-orbit__ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid var(--c-grid);
}

.page-about .about-orbit__ring--1 {
  width: 80%;
  aspect-ratio: 1 / 1;
  border-color: rgba(61, 255, 158, .32);
}

.page-about .about-orbit__ring--2 {
  width: 58%;
  aspect-ratio: 1 / 1;
  border-color: rgba(255, 90, 43, .34);
}

.page-about .about-orbit__ring--3 {
  width: 36%;
  aspect-ratio: 1 / 1;
  border-color: rgba(127, 184, 201, .4);
}

.page-about .about-orbit::before {
  content: "";
  position: absolute;
  width: 80%;
  aspect-ratio: 1 / 1;
  border-radius: 50%;
  background: conic-gradient(from 0deg, transparent 0 68%, rgba(61, 255, 158, .6) 86%, transparent 100%);
  -webkit-mask: radial-gradient(circle, transparent 0 49%, #000 50%);
  mask: radial-gradient(circle, transparent 0 49%, #000 50%);
  animation: aboutOrbitSpin 11s linear infinite;
}

.page-about .about-orbit__core {
  position: relative;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: clamp(30px, 7vw, 46px);
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--c-neon);
  text-shadow: 0 0 24px rgba(61, 255, 158, .45);
}

.page-about .about-orbit__tag {
  position: absolute;
  right: 14px;
  bottom: 14px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: .22em;
  color: var(--c-mist);
  writing-mode: vertical-rl;
  z-index: 2;
}

@keyframes aboutOrbitSpin {
  to { transform: rotate(360deg); }
}

/* ---------- 正文骨架 ---------- */

.page-about .about-body {
  position: relative;
  padding: 48px 0 72px;
  background:
    radial-gradient(90% 60% at 100% 0%, rgba(42, 27, 74, .55), transparent 62%),
    var(--c-deep);
}

.page-about .about-layout {
  display: grid;
  gap: 28px;
}

.page-about .about-stream {
  display: grid;
  gap: 22px;
  min-width: 0;
}

/* ---------- 左侧索引栏 ---------- */

.page-about .about-rail {
  display: none;
}

.page-about .about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  border-left: 1px solid var(--c-grid);
}

.page-about .about-rail__link {
  display: grid;
  gap: 3px;
  padding: 9px 4px 9px 13px;
  margin-left: -1px;
  border-left: 2px solid transparent;
  text-decoration: none;
  color: var(--c-mist);
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  color: var(--c-neon);
  border-left-color: var(--c-neon);
  background: rgba(61, 255, 158, .05);
}

.page-about .about-rail__num {
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--c-orange);
}

.page-about .about-rail__label {
  font-size: 12px;
  letter-spacing: .06em;
  color: inherit;
}

/* ---------- 奶油纸面文字区 ---------- */

.page-about .about-block {
  position: relative;
  padding: clamp(26px, 5vw, 46px);
  background: var(--c-cream);
  color: var(--c-ink);
  clip-path: var(--clip-cut);
  scroll-margin-top: calc(var(--header-h) + 28px);
}

.page-about .about-block__tag {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  padding: 0;
}

.page-about .about-block__num {
  display: inline-block;
  padding: 5px 8px 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: .06em;
  color: #fff;
  background: var(--c-orange);
  clip-path: polygon(0 0, 100% 0, 100% 68%, 86% 100%, 0 100%);
}

.page-about .about-block__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: rgba(27, 21, 18, .55);
}

.page-about .about-block__title {
  margin: 0 0 18px;
  font-size: clamp(21px, 3.6vw, 33px);
  font-weight: 800;
  line-height: 1.26;
  letter-spacing: -.012em;
  color: var(--c-ink);
}

.page-about .about-block .prose p {
  margin: 0 0 14px;
  max-width: 38em;
  font-size: clamp(15px, 2.1vw, 16.5px);
  line-height: 1.82;
  color: var(--about-body-ink);
}

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

.page-about .about-block .prose strong {
  color: var(--c-ink);
  font-weight: 700;
}

.page-about .about-block .prose a {
  color: #A5310D;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 90, 43, .55);
  transition: color .2s ease, border-color .2s ease;
}

.page-about .about-block .prose a:hover,
.page-about .about-block .prose a:focus-visible {
  color: var(--c-ink);
  border-bottom-color: var(--c-ink);
}

/* ---------- 图片 ---------- */

.page-about .about-figure {
  margin: 20px 0 26px;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  clip-path: var(--clip-cut-sm);
  filter: saturate(.94) contrast(1.03);
}

.page-about .about-figure figcaption {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.65;
  letter-spacing: .03em;
  color: rgba(27, 21, 18, .58);
}

/* ---------- 四步流程 ---------- */

.page-about .about-steps {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-step {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: 1px solid var(--about-hair);
}

.page-about .about-step:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .about-step__k {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .2em;
  color: var(--c-orange);
}

.page-about .about-step__d {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: var(--about-body-ink);
}

/* ---------- 数据带 ---------- */

.page-about .about-strip {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--c-grid);
  border: 1px solid var(--c-grid);
  clip-path: var(--clip-cut-sm);
  overflow: hidden;
}

.page-about .about-strip__item {
  display: grid;
  gap: 8px;
  padding: 20px 18px;
  background: linear-gradient(160deg, rgba(18, 48, 85, .78), rgba(7, 19, 39, .96));
}

.page-about .about-strip__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 4.6vw, 42px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.015em;
  color: var(--c-neon);
}

.page-about .about-strip__u {
  margin-left: 5px;
  font-size: .44em;
  color: var(--c-cream);
  opacity: .78;
}

.page-about .about-strip__label {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--c-mist);
}

/* ---------- 团队分工 ---------- */

.page-about .about-roster {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-roster__item {
  position: relative;
  padding: 16px 18px 16px 22px;
  background: rgba(27, 21, 18, .045);
  clip-path: var(--clip-cut-sm);
}

.page-about .about-roster__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--c-orange), var(--c-amber));
}

.page-about .about-roster__role {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin: 0 0 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-ink);
}

.page-about .about-roster__count {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--c-orange);
  white-space: nowrap;
}

.page-about .about-roster__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--about-body-ink);
}

.page-about .about-roster__note {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px dashed var(--about-hair);
}

/* ---------- 赛季刻度与列表 ---------- */

.page-about .about-scale {
  display: block;
  width: 100%;
  height: auto;
  margin: 6px 0 26px;
  overflow: visible;
}

.page-about .about-scale__axis {
  stroke: rgba(27, 21, 18, .3);
  stroke-width: 1;
}

.page-about .about-scale__tick line {
  stroke: rgba(27, 21, 18, .34);
  stroke-width: 1.5;
}

.page-about .about-scale__tick circle {
  fill: var(--c-orange);
}

.page-about .about-scale__tick--now circle {
  fill: var(--c-ink);
  r: 5;
}

.page-about .about-scale__tick text {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  fill: rgba(27, 21, 18, .55);
  text-anchor: middle;
}

.page-about .about-seasons {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-seasons li {
  display: grid;
  gap: 6px;
  padding: 15px 0;
  border-top: 1px solid var(--about-hair);
  font-size: 14.5px;
  line-height: 1.76;
  color: var(--about-body-ink);
}

.page-about .about-seasons__k {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--c-orange);
}

.page-about .about-split__foot {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--about-body-ink);
}

.page-about .about-split__foot a {
  color: #A5310D;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 90, 43, .5);
}

.page-about .about-split__foot a:hover,
.page-about .about-split__foot a:focus-visible {
  color: var(--c-ink);
  border-bottom-color: var(--c-ink);
}

.page-about .about-split__side {
  margin-top: 24px;
}

.page-about .about-split__side img {
  aspect-ratio: 12 / 7;
}

/* ---------- 天津通栏 ---------- */

.page-about .about-block--feature {
  padding: 0;
  background: var(--c-deep);
  color: var(--c-cream);
  overflow: hidden;
}

.page-about .about-block__bg {
  position: relative;
  height: clamp(180px, 40vw, 330px);
  overflow: hidden;
}

.page-about .about-block__bg img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(.92) brightness(.7);
}

.page-about .about-block__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 19, 39, .25), rgba(7, 19, 39, .96));
}

.page-about .about-block__inner {
  position: relative;
  z-index: 1;
  margin-top: -56px;
  padding: 0 clamp(26px, 5vw, 46px) clamp(28px, 5vw, 46px);
}

.page-about .about-block--feature .about-block__label {
  color: var(--c-mist);
}

.page-about .about-block--feature .about-block__title {
  color: var(--c-cream);
}

.page-about .about-block--feature .prose p {
  color: var(--c-mist);
}

/* ---------- 合作与联系 ---------- */

.page-about .about-connect {
  display: grid;
  gap: 24px;
  margin-top: 22px;
}

.page-about .about-partners {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
}

.page-about .about-partners li {
  display: grid;
  gap: 5px;
  padding: 13px 0;
  border-bottom: 1px dashed var(--about-hair);
  font-size: 14px;
  line-height: 1.72;
  color: var(--about-body-ink);
}

.page-about .about-partners li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.page-about .about-partners__k {
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--c-orange);
}

.page-about .about-connect__card {
  padding: 26px 22px 24px;
  background: linear-gradient(160deg, var(--c-deep), var(--c-violet));
  border: 1px solid var(--c-grid);
  clip-path: var(--clip-cut-sm);
  color: var(--c-cream);
}

.page-about .about-connect__label {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--c-amber);
}

.page-about .about-connect__mail {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: clamp(14px, 2.6vw, 17px);
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--c-neon);
  word-break: break-all;
}

.page-about .about-connect__phone {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .04em;
  color: var(--c-cream);
}

.page-about .about-connect__note {
  margin: 0 0 20px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-about .about-connect__card .btn {
  display: inline-block;
}

.page-about .about-connect__icp {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--c-grid);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--c-mist);
}

/* ---------- 平板 ---------- */

@media (min-width: 640px) {
  .page-about .about-step {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-about .about-seasons li {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: 18px;
  }

  .page-about .about-partners li {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 16px;
  }

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

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

/* ---------- 桌面 ---------- */

@media (min-width: 900px) {
  .page-about .about-masthead {
    padding: calc(var(--header-h) + 56px) 0 64px;
  }

  .page-about .about-masthead__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: center;
    margin-top: 38px;
  }

  .page-about .about-masthead__panel {
    max-width: 420px;
    justify-self: end;
  }

  .page-about .about-connect {
    grid-template-columns: minmax(0, 1fr) minmax(0, .82fr);
    gap: 34px;
    align-items: start;
  }

  .page-about .about-split {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 36px;
    align-items: start;
  }

  .page-about .about-split__side {
    margin-top: 0;
  }
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 52px;
    align-items: start;
  }

  .page-about .about-rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 26px);
    padding-top: 6px;
  }

  .page-about .about-stream {
    gap: 24px;
  }

  .page-about .about-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-strip__item {
    padding: 24px 20px;
  }
}

@media (min-width: 1280px) {
  .page-about .about-block {
    padding: 50px 54px;
  }

  .page-about .about-masthead h1 {
    max-width: 14em;
  }
}

/* ---------- 无障碍与动效偏好 ---------- */

.page-about a:focus-visible,
.page-about .about-rail__link:focus-visible {
  outline: 2px solid var(--c-neon);
  outline-offset: 3px;
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-orbit::before {
    animation: none;
  }

  .page-about .about-rail__link,
  .page-about .breadcrumbs a,
  .page-about .about-block .prose a,
  .page-about .about-split__foot a {
    transition: none;
  }
}
<<<END>>>