.page-about {
  --about-rail: 150px;
  --about-dot: 12px;
  background: var(--cream);
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: calc(var(--header-h) + 46px) 0 78px;
  background:
    radial-gradient(120% 90% at 84% 6%, rgba(226, 49, 74, 0.38), transparent 58%),
    radial-gradient(90% 80% at 4% 92%, rgba(31, 138, 87, 0.26), transparent 62%),
    var(--night);
  color: var(--cream);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(245, 241, 232, 0.18) 1px, transparent 1px);
  background-size: 22px 22px;
  opacity: 0.45;
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, #000, transparent 76%);
  mask-image: linear-gradient(180deg, #000, transparent 76%);
}

.page-about .about-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-about .hero-grid {
  display: grid;
  gap: 34px;
}

.page-about .crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--fog);
}

.page-about .crumb li + li::before {
  content: "/";
  margin-right: 6px;
  color: rgba(201, 210, 218, 0.5);
}

.page-about .crumb a {
  color: var(--fog);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 210, 218, 0.4);
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .crumb a:hover {
  color: var(--cream);
  border-color: var(--stand);
}

.page-about .hero-title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(38px, 8.6vw, 82px);
  line-height: 0.97;
  letter-spacing: -0.02em;
  color: var(--cream);
}

.page-about .hero-title__mark {
  color: var(--stand);
}

.page-about .hero-lead {
  max-width: 34em;
  color: rgba(245, 241, 232, 0.86);
  font-size: 16px;
  line-height: 1.78;
  margin: 0 0 26px;
}

.page-about .hero-stat {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 16px 20px;
  border: 1px solid rgba(198, 255, 61, 0.35);
  border-radius: var(--radius);
  background: rgba(11, 27, 43, 0.55);
  width: fit-content;
  max-width: 100%;
}

.page-about .hero-stat .score {
  font-family: var(--font-num);
  font-size: clamp(42px, 11vw, 68px);
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .hero-stat .score__unit {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--fog);
}

.page-about .hero-side__title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--fog);
}

.page-about .hero-index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .hero-index a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  padding: 12px 18px;
  border-radius: var(--pill);
  border: 1px solid rgba(245, 241, 232, 0.18);
  background: rgba(11, 27, 43, 0.4);
  color: var(--cream);
  text-decoration: none;
  font-size: 14px;
  transition: border-color 0.24s var(--ease), background 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-about .hero-index a span {
  font-family: var(--font-num);
  font-size: 12px;
  color: var(--stand);
  white-space: nowrap;
}

.page-about .hero-index a:hover {
  border-color: var(--stand);
  background: rgba(255, 122, 47, 0.16);
  transform: translateX(3px);
}

.page-about .hero-wave {
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  width: 100%;
  height: 54px;
  opacity: 0.4;
  pointer-events: none;
}

.page-about .hero-wave .wave__line {
  fill: none;
  stroke: var(--heart);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
  vector-effect: non-scaling-stroke;
}

/* ---------- 通用章节标题 ---------- */
.page-about .sec-title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(26px, 4.8vw, 44px);
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--ink);
}

.page-about .sec-title--light {
  color: var(--cream);
}

.page-about .lead {
  max-width: 40em;
  margin: 0 0 26px;
  font-size: 16px;
  line-height: 1.78;
  color: #3d454e;
}

.page-about .lead--light {
  color: rgba(245, 241, 232, 0.84);
}

.page-about .eyebrow--light {
  color: var(--stand);
}

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

/* ---------- 缘起 ---------- */
.page-about .origin {
  padding: clamp(54px, 9vw, 104px) 0;
  background: var(--cream);
}

.page-about .origin-grid {
  display: grid;
  gap: 32px;
}

.page-about .body-text {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.82;
  color: #29313a;
  max-width: 40em;
}

.page-about .origin-facts {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .origin-facts li {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: rgba(11, 27, 43, 0.05);
  border-left: 3px solid var(--heart);
}

.page-about .fact-num {
  font-family: var(--font-num);
  font-size: 20px;
  font-weight: 700;
  color: var(--heart);
  min-width: 2.4em;
  font-variant-numeric: tabular-nums;
}

.page-about .fact-txt {
  font-size: 14px;
  line-height: 1.6;
  color: #3d454e;
}

.page-about .origin-figure {
  margin: 0;
}

.page-about .origin-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
}

.page-about .origin-figure .media,
.page-about .team-figure .media,
.page-about .cities-figure {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
}

.page-about .origin-figure img,
.page-about .team-figure img,
.page-about .cities-figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ---------- 时间线 ---------- */
.page-about .line-sec {
  position: relative;
  padding: clamp(60px, 9vw, 110px) 0;
  background:
    radial-gradient(90% 70% at 92% 4%, rgba(58, 43, 107, 0.9), transparent 60%),
    var(--night-deep);
  color: var(--cream);
  overflow: hidden;
}

.page-about .line-sec::before {
  content: "";
  position: absolute;
  top: 0;
  left: -4%;
  right: -4%;
  height: 30px;
  background: var(--stand);
  transform: skewY(-1.8deg);
  transform-origin: left top;
  opacity: 0.9;
}

.page-about .tl {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 10px;
  bottom: 24px;
  width: 2px;
  background: linear-gradient(180deg, var(--heart), var(--stand) 52%, var(--lime));
  opacity: 0.85;
}

.page-about .tl__item {
  position: relative;
  padding-left: 42px;
  margin-bottom: 24px;
}

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

.page-about .tl__mark {
  position: relative;
  margin-bottom: 10px;
}

.page-about .tl__mark::before {
  content: "";
  position: absolute;
  left: -36px;
  top: 4px;
  width: var(--about-dot);
  height: var(--about-dot);
  border-radius: 50%;
  background: var(--heart);
  box-shadow: 0 0 0 4px rgba(226, 49, 74, 0.22);
}

.page-about .tl__item:nth-child(2) .tl__mark::before {
  background: var(--stand);
  box-shadow: 0 0 0 4px rgba(255, 122, 47, 0.22);
}

.page-about .tl__item:nth-child(3) .tl__mark::before {
  background: var(--grass);
  box-shadow: 0 0 0 4px rgba(31, 138, 87, 0.26);
}

.page-about .tl__item:nth-child(4) .tl__mark::before {
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(198, 255, 61, 0.22);
}

.page-about .tl__year {
  font-family: var(--font-num);
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .tl__card {
  padding: 22px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(245, 241, 232, 0.16);
  background: rgba(11, 27, 43, 0.62);
  max-width: 100%;
  transition: border-color 0.24s var(--ease), transform 0.32s var(--ease);
}

.page-about .tl__card:hover {
  border-color: rgba(255, 122, 47, 0.6);
}

.page-about .tl__stage {
  margin: 0 0 8px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--stand);
}

.page-about .tl__card .t-card {
  margin: 0 0 10px;
  font-size: 19px;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .tl__card p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.76;
  color: rgba(245, 241, 232, 0.82);
}

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

.page-about .tl__facts li {
  padding: 6px 12px;
  border-radius: var(--pill);
  border: 1px solid rgba(201, 210, 218, 0.28);
  font-size: 12px;
  color: var(--fog);
}

/* ---------- 团队 ---------- */
.page-about .team {
  padding: clamp(54px, 9vw, 100px) 0;
  background: var(--cream);
}

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

.page-about .team__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-about .team__pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-about .team__pill {
  display: inline-flex;
  align-items: center;
  padding: 9px 18px;
  border-radius: var(--pill);
  border: 1px solid rgba(11, 27, 43, 0.2);
  background: rgba(11, 27, 43, 0.04);
  color: #29313a;
  font-size: 14px;
  cursor: pointer;
  transition: background 0.24s var(--ease), color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-about .team__pill:hover {
  border-color: var(--heart);
  color: var(--heart);
}

.page-about .team__panels {
  border-radius: var(--radius-lg);
  background: rgba(11, 27, 43, 0.05);
  padding: 22px;
  border: 1px solid rgba(11, 27, 43, 0.08);
}

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

.page-about #team-edit:checked ~ .team__panels .team__panel--edit,
.page-about #team-data:checked ~ .team__panels .team__panel--data,
.page-about #team-video:checked ~ .team__panels .team__panel--video,
.page-about #team-support:checked ~ .team__panels .team__panel--support {
  display: block;
}

.page-about #team-edit:checked ~ .team__pills .team__pill[for="team-edit"],
.page-about #team-data:checked ~ .team__pills .team__pill[for="team-data"],
.page-about #team-video:checked ~ .team__pills .team__pill[for="team-video"],
.page-about #team-support:checked ~ .team__pills .team__pill[for="team-support"] {
  background: var(--heart);
  border-color: var(--heart);
  color: var(--cream);
}

.page-about .team__radio:focus-visible + .team__radio + .team__radio + .team__radio + .team__pills .team__pill {
  outline: none;
}

.page-about .team__panel .t-card {
  margin: 0 0 10px;
  font-size: 18px;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .team__panel p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.78;
  color: #3d454e;
}

.page-about .team__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .team__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: #29313a;
}

.page-about .team__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--heart);
}

.page-about .team-figure {
  margin: 0;
}

.page-about .team-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
}

/* ---------- 城市看台 ---------- */
.page-about .cities {
  padding: clamp(56px, 9vw, 104px) 0;
  background:
    radial-gradient(80% 60% at 8% 0%, rgba(31, 138, 87, 0.32), transparent 58%),
    var(--night-soft);
  color: var(--cream);
}

.page-about .cities-figure {
  margin: 0 0 24px;
  border: 1px solid rgba(245, 241, 232, 0.14);
  max-height: 380px;
}

.page-about .cities-figure img {
  max-height: 380px;
}

.page-about .city-grid {
  display: grid;
  gap: 14px;
}

.page-about .city-card {
  padding: 22px;
  border-radius: var(--radius-lg);
  background: rgba(11, 27, 43, 0.55);
  border: 1px solid rgba(245, 241, 232, 0.16);
}

.page-about .city-card--warm {
  background: linear-gradient(155deg, rgba(255, 122, 47, 0.24), rgba(122, 31, 53, 0.55));
  border-color: rgba(255, 122, 47, 0.5);
}

.page-about .city-card .t-card {
  margin: 0 0 10px;
  font-size: 18px;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .city-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(245, 241, 232, 0.82);
}

/* ---------- 12 分钟 ---------- */
.page-about .twelve {
  padding: clamp(56px, 9vw, 104px) 0;
  background:
    radial-gradient(90% 70% at 90% 0%, rgba(226, 49, 74, 0.32), transparent 60%),
    var(--wine);
  color: var(--cream);
}

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

.page-about .step {
  padding: 18px 20px;
  border-radius: var(--radius);
  background: rgba(11, 27, 43, 0.42);
  border-left: 3px solid var(--stand);
}

.page-about .step time {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-num);
  font-size: 24px;
  letter-spacing: -0.02em;
  color: var(--lime);
  font-variant-numeric: tabular-nums;
}

.page-about .step .t-card {
  margin: 0 0 8px;
  font-size: 17px;
  line-height: 1.4;
  color: var(--cream);
}

.page-about .step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(245, 241, 232, 0.82);
}

.page-about .twelve-extra {
  margin-top: 22px;
  display: grid;
  gap: 10px;
}

.page-about .acc {
  border: 1px solid rgba(245, 241, 232, 0.22);
  border-radius: var(--radius);
  background: rgba(11, 27, 43, 0.35);
  padding: 14px 18px;
}

.page-about .acc summary {
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 700;
  color: var(--cream);
}

.page-about .acc summary::-webkit-details-marker {
  display: none;
}

.page-about .acc summary::after {
  content: "＋";
  float: right;
  margin-left: 12px;
  color: var(--lime);
}

.page-about .acc[open] summary::after {
  content: "－";
}

.page-about .acc p {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(245, 241, 232, 0.82);
}

/* ---------- 认可 ---------- */
.page-about .trust {
  padding: clamp(54px, 9vw, 100px) 0;
  background: var(--cream);
}

.page-about .trust-grid {
  display: grid;
  gap: 14px;
}

.page-about .trust-card {
  padding: 22px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(11, 27, 43, 0.12);
  background: #fffdf8;
  border-top: 3px solid var(--stand);
}

.page-about .trust-num {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-num);
  font-size: 38px;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--heart);
  font-variant-numeric: tabular-nums;
}

.page-about .trust-card .t-card {
  margin: 0 0 8px;
  font-size: 16px;
  line-height: 1.4;
  color: var(--ink);
}

.page-about .trust-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: #3d454e;
}

/* ---------- 结尾引导 ---------- */
.page-about .about-cta {
  padding: clamp(48px, 8vw, 90px) 0;
  background: var(--night);
}

.page-about .cta-panel {
  display: grid;
  gap: 22px;
  padding: clamp(24px, 4vw, 40px);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(226, 49, 74, 0.35);
  background:
    radial-gradient(120% 100% at 100% 0%, rgba(226, 49, 74, 0.28), transparent 62%),
    var(--night-deep);
}

.page-about .cta-panel .lead {
  margin-bottom: 0;
}

.page-about .cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .origin-grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 48px;
    align-items: start;
  }

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

  .page-about .twelve-extra {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

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

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

  .page-about .cta-panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 52px;
    align-items: end;
  }

  .page-about .team-wrap {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 40px;
    align-items: start;
  }

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

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

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

  .page-about .tl::before {
    left: calc(var(--about-rail) - 2px);
    top: 16px;
    bottom: 40px;
  }

  .page-about .tl__item {
    display: grid;
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
    gap: 0;
    padding-left: 0;
    margin-bottom: 30px;
    align-items: start;
  }

  .page-about .tl__mark {
    position: sticky;
    top: calc(var(--header-h) + 22px);
    align-self: start;
    margin: 0;
    padding-right: 28px;
    text-align: right;
  }

  .page-about .tl__mark::before {
    left: auto;
    right: -6px;
    top: 6px;
  }

  .page-about .tl__year {
    display: inline-block;
    font-size: 16px;
    writing-mode: horizontal-tb;
  }

  .page-about .tl__card {
    margin-left: 34px;
    width: var(--cardw, 100%);
  }

  .page-about .tl__item:nth-child(1) {
    --cardw: min(100%, 560px);
  }

  .page-about .tl__item:nth-child(2) {
    --cardw: min(100%, 640px);
  }

  .page-about .tl__item:nth-child(3) {
    --cardw: min(100%, 730px);
  }

  .page-about .tl__item:nth-child(4) {
    --cardw: 100%;
  }

  .page-about .cities-figure,
  .page-about .cities-figure img {
    max-height: 440px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .hero-index a,
  .page-about .tl__card,
  .page-about .team__pill {
    transition: none;
  }

  .page-about .hero-index a:hover {
    transform: none;
  }
}
<<<END>>>