.page-about {
  --about-max: 68ch;
  overflow-x: clip;
  padding-bottom: var(--g5);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: var(--g3);
  padding-bottom: var(--g2);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: var(--g3) 0 var(--g5);
  overflow: clip;
}

.page-about .about-hero__glow {
  position: absolute;
  inset: -18% -12% auto -12%;
  height: 620px;
  pointer-events: none;
  background:
    radial-gradient(58% 68% at 20% 32%, rgba(255, 106, 26, .30), transparent 62%),
    radial-gradient(46% 58% at 80% 16%, rgba(43, 227, 208, .22), transparent 66%);
  filter: blur(8px);
  animation: about-drift 20s var(--ease) infinite alternate;
}

@keyframes about-drift {
  from { transform: translate3d(-2%, 0, 0) scale(1); }
  to   { transform: translate3d(2%, -3%, 0) scale(1.07); }
}

.page-about .about-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--g4);
  align-items: end;
}

.page-about .about-kicker {
  margin: 0 0 var(--g2);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero__title {
  margin: 0 0 var(--g3);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7.4vw, 4.3rem);
  line-height: 1.05;
  letter-spacing: -.02em;
  color: var(--paper);
  text-shadow: 0 0 38px rgba(255, 106, 26, .26);
}

.page-about .about-hero__lead {
  margin: 0;
  max-width: 56ch;
  font-size: clamp(1rem, 1.7vw, 1.1rem);
  line-height: 1.8;
  color: var(--body-soft);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--g2);
  margin-top: var(--g4);
}

.page-about .about-hero__media {
  position: relative;
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  transform: rotate(-1.2deg);
  box-shadow: 0 30px 70px -40px rgba(255, 106, 26, .55);
}

.page-about .about-hero__media::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 42%;
  background: linear-gradient(0deg, rgba(11, 18, 32, .92), rgba(11, 18, 32, 0));
  pointer-events: none;
}

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-hero__media .media__cap {
  position: relative;
  z-index: 1;
  padding: 0 var(--g3) var(--g2);
  margin-top: calc(-1 * var(--g4));
  color: var(--mist);
  font-size: 13px;
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, .94fr);
    gap: var(--g5);
  }
}

/* ---------- 速览带 ---------- */
.page-about .about-facts {
  padding: 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-facts__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
}

.page-about .about-facts__item {
  background: var(--ink);
  padding: var(--g3) var(--g2);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-facts__num {
  font-size: clamp(1.6rem, 5vw, 2.3rem);
  font-weight: 500;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--amber);
}

.page-about .about-facts__num em {
  font-style: normal;
  font-size: .62em;
  color: var(--orange);
  margin-left: 2px;
}

.page-about .about-facts__label {
  font-size: 13px;
  line-height: 1.55;
  color: var(--mist);
}

@media (min-width: 760px) {
  .page-about .about-facts__list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-facts__item {
    padding: var(--g3) var(--g3);
  }
}

/* ---------- 章节通用 ---------- */
.page-about .sec-head {
  margin-bottom: var(--g4);
}

.page-about .sec-head--tight {
  margin-bottom: var(--g3);
}

.page-about .sec-head__lead {
  max-width: 58ch;
}

/* ---------- 01 起因 ---------- */
.page-about .about-origin__body {
  max-width: var(--about-max);
  border-left: 3px solid var(--orange);
  padding-left: var(--g3);
}

.page-about .about-origin__p {
  margin: 0 0 var(--g3);
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--body-soft);
}

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

/* ---------- 02 三条主线 ---------- */
.page-about .about-lines__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-lines__item {
  position: relative;
  background: var(--ink);
  padding: var(--g4) var(--g3) var(--g3);
}

.page-about .about-lines__item::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: var(--accent, var(--orange));
}

.page-about .about-lines__item--eval { --accent: var(--orange); }
.page-about .about-lines__item--calendar { --accent: var(--cyan); }
.page-about .about-lines__item--guide { --accent: var(--amber); }

.page-about .about-lines__title {
  margin: 0 0 var(--g2);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.28rem;
  line-height: 1.3;
  color: var(--paper);
}

.page-about .about-lines__text {
  margin: 0 0 var(--g3);
  font-size: .96rem;
  line-height: 1.8;
  color: var(--body-soft);
}

.page-about .about-lines__meta {
  display: block;
  font-size: 12.5px;
  letter-spacing: .05em;
  color: var(--accent, var(--orange));
}

.page-about .about-lines__foot {
  margin: var(--g4) 0 0;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-lines__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 227, 208, .4);
}

.page-about .about-lines__foot a:hover,
.page-about .about-lines__foot a:focus-visible {
  border-bottom-color: var(--cyan);
  outline: none;
}

@media (min-width: 860px) {
  .page-about .about-lines__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 03 评测流程 ---------- */
.page-about .about-flow__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--g5);
  align-items: start;
}

.page-about .flow {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--g2);
}

.page-about .flow__det {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(20, 31, 51, .62);
  overflow: hidden;
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-about .flow__det:hover,
.page-about .flow__det[open] {
  border-color: rgba(43, 227, 208, .55);
  background: rgba(20, 31, 51, .92);
}

.page-about .flow__sum {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: var(--g2);
  min-height: 48px;
  padding: 12px var(--g3);
  cursor: pointer;
  list-style: none;
}

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

.page-about .flow__sum:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-about .flow__idx {
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--amber);
}

.page-about .flow__name {
  font-size: .98rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

.page-about .flow__hint {
  font-size: 11.5px;
  letter-spacing: .08em;
  color: var(--mist);
  white-space: nowrap;
}

.page-about .flow__det[open] .flow__hint {
  color: var(--cyan);
}

.page-about .flow__text {
  margin: 0;
  padding: 0 var(--g3) var(--g3) calc(var(--g3) + 34px);
  font-size: .93rem;
  line-height: 1.8;
  color: var(--body-soft);
  animation: about-fade .22s var(--ease);
}

@keyframes about-fade {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}

.page-about .about-flow__media {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-flow__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}

@media (min-width: 960px) {
  .page-about .about-flow__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
  .page-about .about-flow__media {
    position: sticky;
    top: var(--g4);
  }
}

/* ---------- 04 团队 ---------- */
.page-about .about-crew__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--g4);
  align-items: start;
}

.page-about .crew {
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--ink);
  overflow: hidden;
}

.page-about .crew + .crew {
  margin-top: var(--g2);
}

.page-about .crew--eval { --band: var(--orange); --band-w: 92%; }
.page-about .crew--guide { --band: var(--cyan); --band-w: 74%; }
.page-about .crew--calendar { --band: var(--mist); --band-w: 58%; }

.page-about .crew__sum {
  display: grid;
  gap: 12px;
  min-height: 56px;
  padding: var(--g3);
  cursor: pointer;
  list-style: none;
}

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

.page-about .crew__sum:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-about .crew__top {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--g2);
  flex-wrap: wrap;
}

.page-about .crew__name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.12rem;
  color: var(--paper);
}

.page-about .crew__tag {
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-about .crew__band {
  display: block;
  height: 6px;
  width: var(--band-w, 60%);
  border-radius: var(--r-pill);
  background: var(--band, var(--orange));
  transition: width .3s var(--ease);
}

.page-about .crew[open] .crew__band {
  width: 100%;
}

.page-about .crew__body {
  padding: 0 var(--g3) var(--g3);
  animation: about-fade .22s var(--ease);
}

.page-about .crew__body p {
  margin: 0;
  font-size: .94rem;
  line-height: 1.8;
  color: var(--body-soft);
}

.page-about .about-crew__media {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-about .about-crew__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-about .about-crew__foot {
  margin: var(--g4) 0 0;
  max-width: 62ch;
  font-size: .95rem;
  line-height: 1.8;
  color: var(--mist);
}

@media (min-width: 960px) {
  .page-about .about-crew__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
}

/* ---------- 05 界面演进 ---------- */
.page-about .about-skins__panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--g4);
}

.page-about .about-skins__stats {
  display: grid;
  gap: var(--g3);
  padding: var(--g4) var(--g3);
  background: var(--ink-2);
  border-radius: var(--r-lg);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 34px) 100%, 0 100%);
}

.page-about .about-skins__stat {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}

.page-about .about-skins__num {
  font-size: clamp(1.9rem, 6vw, 2.6rem);
  font-weight: 500;
  line-height: 1;
  letter-spacing: .02em;
  color: var(--amber);
}

.page-about .about-skins__num em {
  font-style: normal;
  font-size: .55em;
  color: var(--orange);
}

.page-about .about-skins__unit {
  font-size: 13px;
  color: var(--mist);
}

.page-about .about-skins__body p {
  margin: 0 0 var(--g3);
  font-size: .98rem;
  line-height: 1.85;
  color: var(--body-soft);
}

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

@media (min-width: 880px) {
  .page-about .about-skins__panel {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: start;
  }
}

/* ---------- 06 时间线 ---------- */
.page-about .tl {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--g3);
}

.page-about .tl-axis {
  display: flex;
  gap: var(--g2);
  overflow-x: auto;
  padding-bottom: 6px;
  scrollbar-width: thin;
}

.page-about .tl-axis__node {
  flex: 0 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-height: 44px;
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-pill);
  text-decoration: none;
  background: var(--ink-2);
  transition: border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-about .tl-axis__node:hover,
.page-about .tl-axis__node:focus-visible {
  border-color: var(--orange);
  background: rgba(255, 106, 26, .12);
  outline: none;
}

.page-about .tl-axis__year {
  font-size: 13px;
  letter-spacing: .05em;
  color: var(--amber);
}

.page-about .tl-axis__label {
  font-size: 12px;
  color: var(--mist);
}

.page-about .tl-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  position: relative;
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 var(--g4) var(--g4);
  border-left: 1px solid var(--line);
}

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

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 8px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 106, 26, .16);
}

.page-about .tl-item:nth-child(3)::before { background: var(--cyan); box-shadow: 0 0 0 4px rgba(43, 227, 208, .16); }
.page-about .tl-item:nth-child(5)::before { background: var(--amber); box-shadow: 0 0 0 4px rgba(255, 176, 32, .16); }

.page-about .tl-item:target::before {
  box-shadow: 0 0 0 6px rgba(255, 106, 26, .30);
}

.page-about .tl-item__mark {
  margin: 0 0 6px;
  font-size: clamp(1.4rem, 5vw, 1.9rem);
  font-weight: 500;
  line-height: 1;
  letter-spacing: .04em;
  color: var(--amber);
}

.page-about .tl-item__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.05rem;
  line-height: 1.45;
  color: var(--paper);
}

.page-about .tl-item__text {
  margin: 0;
  max-width: 60ch;
  font-size: .94rem;
  line-height: 1.8;
  color: var(--body-soft);
}

@media (min-width: 900px) {
  .page-about .tl {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: var(--g5);
  }
  .page-about .tl-axis {
    position: sticky;
    top: var(--g4);
    align-self: start;
    flex-direction: column;
    overflow: visible;
    padding-bottom: 0;
  }
  .page-about .tl-axis__node {
    border-radius: var(--r-md);
    width: 100%;
  }
}

/* ---------- 07 合作 ---------- */
.page-about .about-partners__body {
  max-width: var(--about-max);
}

.page-about .about-partners__body p {
  margin: 0 0 var(--g3);
  font-size: .99rem;
  line-height: 1.85;
  color: var(--body-soft);
}

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

.page-about .about-partners__actions {
  margin-top: var(--g4);
}

/* ---------- 结尾 ---------- */
.page-about .about-end {
  padding-bottom: var(--g5);
}

.page-about .about-end__inner {
  position: relative;
  padding: var(--g4) var(--g3);
  border-radius: var(--r-lg);
  background:
    linear-gradient(115deg, rgba(255, 106, 26, .18), rgba(43, 227, 208, .12) 62%, transparent),
    var(--ink-2);
  overflow: hidden;
}

.page-about .about-end__inner::after {
  content: "";
  position: absolute;
  inset: auto -12% -60% 52%;
  height: 220px;
  background: radial-gradient(closest-side, rgba(255, 176, 32, .30), transparent 72%);
  pointer-events: none;
}

.page-about .about-end__title {
  position: relative;
  margin: 0 0 var(--g2);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 5vw, 2.3rem);
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-about .about-end__lead {
  position: relative;
  margin: 0 0 var(--g4);
  max-width: 56ch;
  font-size: .98rem;
  line-height: 1.8;
  color: var(--body-soft);
}

.page-about .about-end__actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: var(--g2);
}

/* ---------- 动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__glow {
    animation: none;
  }
  .page-about .flow__text,
  .page-about .crew__body {
    animation: none;
  }
  .page-about .crew__band {
    transition: none;
  }
  .page-about .about-hero__media {
    transform: none;
  }
}