.page-about {
  --about-hair: rgba(58, 71, 87, .55);
  --about-hair-soft: rgba(58, 71, 87, .32);
  --about-rail-line: rgba(43, 227, 214, .38);
  background: var(--night);
  color: var(--ivory);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 5vw, 48px) 0 clamp(56px, 9vw, 112px);
  background:
    radial-gradient(120% 90% at 88% -12%, rgba(255, 106, 26, .24), transparent 62%),
    radial-gradient(90% 78% at -6% 108%, rgba(43, 227, 214, .16), transparent 66%),
    var(--night);
}

.page-about .about-hero__glow {
  position: absolute;
  top: 10%;
  right: -14%;
  width: 54%;
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--orange) 42%, var(--cyan));
  transform: rotate(-24deg);
  opacity: .85;
  pointer-events: none;
}

.page-about .about-hero__glow::after {
  content: "";
  position: absolute;
  inset: 26px 0 auto 22%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(199, 208, 218, .5));
}

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

.page-about .about-crumb__now {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--silver);
}

.page-about .about-kicker {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  margin: var(--space-4) 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--dim);
}

.page-about .about-kicker__dot {
  width: 7px;
  height: 7px;
  border-radius: var(--r-pill);
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 106, 26, .18);
}

.page-about .about-hero__title {
  margin: var(--space-2) 0 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(38px, 9vw, 108px);
  line-height: .96;
  letter-spacing: -.025em;
  transform: skewX(-6deg);
  transform-origin: left bottom;
  max-width: 18em;
}

.page-about .about-hero__title em {
  display: block;
  margin-top: .1em;
  font-style: normal;
  background: linear-gradient(96deg, var(--orange) 8%, var(--orange-2) 46%, var(--cyan) 94%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-hero__lead {
  max-width: 34em;
  margin: var(--space-3) 0 0;
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-3) var(--space-2);
  margin: var(--space-4) 0 0;
  padding-top: var(--space-3);
  border-top: 1px solid var(--about-hair);
}

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

.page-about .about-figures dt {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--dim);
}

.page-about .about-figures dd {
  margin: var(--space-1) 0 0;
  font-family: var(--font-mono);
  font-size: clamp(24px, 4.6vw, 40px);
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-figures__item:first-child dd {
  color: var(--orange);
}

/* ---------- 品牌开篇 ---------- */
.page-about .about-stance {
  padding: clamp(56px, 10vw, 128px) 0 clamp(48px, 8vw, 96px);
  border-top: 1px solid var(--about-hair-soft);
}

.page-about .about-stance__inner {
  display: grid;
  gap: var(--space-3);
}

.page-about .about-stance__title {
  margin: 0;
  max-width: 20em;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(26px, 4.4vw, 52px);
  line-height: 1.28;
  letter-spacing: -.015em;
  color: var(--ivory);
}

.page-about .about-stance__body {
  display: grid;
  gap: var(--space-2);
  max-width: 40em;
  color: var(--silver);
  line-height: 1.9;
  font-size: clamp(15px, 1.6vw, 17px);
}

.page-about .about-stance__body p {
  margin: 0;
}

.page-about .about-stance__quote {
  position: relative;
  margin: var(--space-4) 0 0;
  padding: var(--space-3) 0 0 var(--space-3);
  border-top: 1px solid var(--about-hair);
  border-left: 2px solid var(--orange);
}

.page-about .about-stance__quote p {
  margin: 0;
  max-width: 22em;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(22px, 3.6vw, 42px);
  line-height: 1.38;
  letter-spacing: -.01em;
  color: var(--ivory);
}

/* ---------- 四个小组 ---------- */
.page-about .about-crews {
  padding: clamp(48px, 9vw, 112px) 0;
  background: linear-gradient(180deg, var(--night) 0%, var(--field) 26%, var(--field) 78%, var(--night) 100%);
}

.page-about .about-crews__head {
  display: grid;
  gap: var(--space-2);
  max-width: 44em;
  margin-bottom: var(--space-4);
}

.page-about .about-section-title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(24px, 3.8vw, 44px);
  line-height: 1.24;
  letter-spacing: -.015em;
  color: var(--ivory);
}

.page-about .about-section-lead {
  margin: 0;
  max-width: 38em;
  color: var(--silver);
  line-height: 1.85;
  font-size: clamp(14px, 1.5vw, 16px);
}

.page-about .about-figure {
  position: relative;
  margin: 0 0 var(--space-4);
  overflow: hidden;
  border-radius: var(--r-lg);
  background: var(--night);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(.92) contrast(1.06);
}

.page-about .about-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(-24deg, rgba(7, 20, 39, .0) 0 4px, rgba(7, 20, 39, .22) 4px 5px),
    linear-gradient(200deg, rgba(7, 20, 39, .05) 40%, rgba(7, 20, 39, .72) 100%);
  pointer-events: none;
}

.page-about .about-figure figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  padding: var(--space-2) var(--space-2) var(--space-2);
  font-size: 13px;
  line-height: 1.6;
  color: var(--silver);
}

.page-about .about-crews__grid {
  display: grid;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-crew {
  position: relative;
  min-width: 0;
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--about-hair-soft);
  transition: transform 160ms var(--ease), background-color 160ms var(--ease);
}

.page-about .about-crew__idx {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--orange);
}

.page-about .about-crew__name {
  margin: var(--space-1) 0 var(--space-1);
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1.35;
  color: var(--ivory);
}

.page-about .about-crew__desc {
  margin: 0 0 var(--space-2);
  max-width: 34em;
  color: var(--silver);
  line-height: 1.8;
  font-size: 15px;
}

.page-about .about-crew__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: var(--space-1);
}

.page-about .about-crew__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--dim);
}

.page-about .about-crew__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

.page-about .about-crew:hover,
.page-about .about-crew:focus-within {
  background: rgba(7, 20, 39, .5);
  transform: translateX(-6px);
}

/* ---------- 赛季历程 ---------- */
.page-about .about-timeline {
  position: relative;
  overflow: hidden;
  padding: clamp(56px, 10vw, 128px) 0;
  background: linear-gradient(180deg, var(--night) 0%, #0a1a30 55%, var(--night) 100%);
}

.page-about .about-timeline__backdrop {
  position: absolute;
  inset: 0;
  z-index: 0;
  opacity: .2;
  pointer-events: none;
}

.page-about .about-timeline__backdrop img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  object-position: center;
}

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

.page-about .about-timeline__head {
  display: grid;
  gap: var(--space-2);
  max-width: 42em;
  margin-bottom: var(--space-4);
}

.page-about .about-timeline__body {
  position: relative;
}

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

.page-about .about-timeline__list {
  position: relative;
  margin: 0;
  padding: 0 0 0 var(--space-3);
  list-style: none;
  display: grid;
  gap: var(--space-2);
}

.page-about .about-timeline__list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 6px;
  bottom: 6px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), var(--orange));
  opacity: .55;
}

.page-about .about-timeline__item {
  position: relative;
  min-width: 0;
  padding: var(--space-2);
  border-radius: var(--r-md);
  background: rgba(7, 20, 39, .55);
  transition: background-color 160ms var(--ease), transform 160ms var(--ease);
}

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--space-3) + 1px);
  top: 22px;
  width: 9px;
  height: 9px;
  border-radius: var(--r-pill);
  background: var(--night);
  border: 1px solid var(--cyan);
  transition: background-color 160ms var(--ease), box-shadow 160ms var(--ease);
}

.page-about .about-timeline__item:hover,
.page-about .about-timeline__item:focus,
.page-about .about-timeline__item:focus-within {
  background: rgba(14, 31, 58, .92);
  transform: translateX(4px);
}

.page-about .about-timeline__item:hover::before,
.page-about .about-timeline__item:focus::before {
  background: var(--orange);
  box-shadow: 0 0 0 5px rgba(255, 106, 26, .18);
}

.page-about .about-node__season {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .about-node__name {
  display: block;
  margin-top: var(--space-1);
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(16px, 2vw, 20px);
  line-height: 1.4;
  color: var(--ivory);
}

.page-about .about-node__note {
  display: block;
  max-height: 0;
  margin-top: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--silver);
  transition: max-height 300ms var(--ease), opacity 200ms var(--ease), margin-top 300ms var(--ease);
}

.page-about .about-timeline__item:hover .about-node__note,
.page-about .about-timeline__item:focus .about-node__note,
.page-about .about-timeline__item:focus-within .about-node__note {
  max-height: 10em;
  margin-top: var(--space-1);
  opacity: 1;
}

/* ---------- 复盘流程 ---------- */
.page-about .about-flow {
  padding: clamp(48px, 9vw, 112px) 0;
  background: var(--night);
}

.page-about .about-flow__inner {
  display: grid;
  gap: var(--space-4);
}

.page-about .about-flow__col {
  display: grid;
  gap: var(--space-2);
  min-width: 0;
}

.page-about .about-flow__steps {
  margin: var(--space-2) 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-hair);
}

.page-about .about-step {
  border-bottom: 1px solid var(--about-hair-soft);
}

.page-about .about-step__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: var(--space-1) var(--space-2);
  padding: var(--space-2) 0;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-step__head::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
  transition: color 160ms var(--ease), transform 160ms var(--ease);
}

.page-about .about-step[open] .about-step__head::after {
  content: "−";
  color: var(--orange);
}

.page-about .about-step__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--orange);
}

.page-about .about-step__name {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(16px, 2vw, 20px);
  color: var(--ivory);
  transition: color 160ms var(--ease);
}

.page-about .about-step__time {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--cyan);
}

.page-about .about-step__head:hover .about-step__name,
.page-about .about-step[open] .about-step__name {
  color: var(--orange);
}

.page-about .about-step__body {
  padding: 0 0 var(--space-2);
}

.page-about .about-step__body p {
  margin: 0;
  max-width: 36em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-flow__figure {
  position: relative;
  margin: 0;
  overflow: hidden;
  border-radius: var(--r-lg);
  background: var(--field);
}

.page-about .about-flow__figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  filter: brightness(.86) saturate(.95);
}

.page-about .about-flow__figure::before {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 55%;
  background: linear-gradient(180deg, transparent, rgba(7, 20, 39, .88));
  pointer-events: none;
}

.page-about .about-flow__figure figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  padding: var(--space-2);
  font-size: 13px;
  line-height: 1.6;
  color: var(--silver);
}

/* ---------- 规模与协作 ---------- */
.page-about .about-scale {
  padding: clamp(48px, 9vw, 112px) 0;
  background: linear-gradient(180deg, var(--night) 0%, var(--field) 34%, var(--night) 100%);
}

.page-about .about-scale__head {
  display: grid;
  gap: var(--space-2);
  max-width: 42em;
  margin-bottom: var(--space-4);
}

.page-about .about-scale__grid {
  display: grid;
  gap: var(--space-2);
}

.page-about .about-scale__panel {
  min-width: 0;
  padding: var(--space-3) var(--space-2);
  border-radius: var(--r-lg);
  background: rgba(7, 20, 39, .72);
  border: 1px solid var(--about-hair-soft);
  transition: transform 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .about-scale__panel:hover {
  transform: translateY(-4px);
  border-color: rgba(43, 227, 214, .45);
}

.page-about .about-scale__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(32px, 5.4vw, 52px);
  line-height: 1;
  color: var(--orange);
}

.page-about .about-scale__label {
  display: block;
  margin-top: var(--space-1);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-scale__text {
  margin: var(--space-2) 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--silver);
}

.page-about .about-scale__note {
  margin: var(--space-4) 0 0;
  max-width: 44em;
  font-size: 14px;
  line-height: 1.9;
  color: var(--dim);
}

.page-about .about-scale__note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 227, 214, .4);
  transition: color 160ms var(--ease), border-color 160ms var(--ease);
}

.page-about .about-scale__note a:hover,
.page-about .about-scale__note a:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 收束 ---------- */
.page-about .about-close {
  position: relative;
  padding: clamp(48px, 9vw, 112px) 0 clamp(56px, 10vw, 120px);
  border-top: 1px solid var(--about-hair);
  background:
    radial-gradient(80% 90% at 100% 0%, rgba(255, 106, 26, .16), transparent 60%),
    var(--night);
}

.page-about .about-close__grid {
  display: grid;
  gap: var(--space-3);
  margin-top: var(--space-4);
}

.page-about .about-close__item {
  min-width: 0;
  padding-top: var(--space-2);
  border-top: 1px solid var(--about-hair-soft);
}

.page-about .about-close__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--clay);
}

.page-about .about-close__item h3 {
  margin: var(--space-1) 0 var(--space-1);
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.4;
  color: var(--ivory);
}

.page-about .about-close__item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-close__cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--about-hair);
}

.page-about .about-close__cta p {
  flex: 1 1 260px;
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver);
}

/* ---------- 平板起 ---------- */
@media (min-width: 720px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-crew {
    padding: var(--space-3) var(--space-2);
  }

  .page-about .about-crews__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 var(--space-3);
    border-top: 1px solid var(--about-hair);
  }

  .page-about .about-crew:nth-child(odd) {
    border-right: 1px solid var(--about-hair-soft);
  }

  .page-about .about-crew:hover,
  .page-about .about-crew:focus-within {
    transform: translate(-6px, -4px);
  }

  .page-about .about-crew:nth-child(even):hover,
  .page-about .about-crew:nth-child(even):focus-within {
    transform: translate(6px, -4px);
  }

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

  .page-about .about-close__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--space-2) var(--space-3);
  }
}

/* ---------- 桌面起 ---------- */
@media (min-width: 960px) {
  .page-about .about-timeline__rail {
    display: block;
    position: absolute;
    inset: -8% -4% -8% -4%;
    width: 108%;
    height: 116%;
    pointer-events: none;
  }

  .page-about .about-timeline__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--space-4) var(--space-3);
    padding-left: 0;
  }

  .page-about .about-timeline__list::before {
    display: none;
  }

  .page-about .about-timeline__item {
    background: rgba(7, 20, 39, .7);
  }

  .page-about .about-timeline__item::before {
    left: -14px;
    top: 26px;
  }

  .page-about .about-timeline__item:nth-child(even) {
    transform: translateY(var(--space-4));
  }

  .page-about .about-timeline__item:nth-child(even):hover,
  .page-about .about-timeline__item:nth-child(even):focus {
    transform: translateY(var(--space-4)) translateX(4px);
  }

  .page-about .about-flow__inner {
    grid-template-columns: 1.2fr .85fr;
    gap: var(--space-4);
    align-items: start;
  }

  .page-about .about-flow__figure {
    margin-right: calc(-1 * var(--gutter));
    border-radius: var(--r-lg) 0 0 var(--r-lg);
  }

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

  .page-about .about-stance__inner {
    grid-template-columns: minmax(0, 1fr);
    padding-left: clamp(0px, 6vw, 96px);
  }

  .page-about .about-stance__quote {
    margin-left: calc(-1 * clamp(0px, 6vw, 96px));
    padding-left: var(--space-4);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-crew,
  .page-about .about-timeline__item,
  .page-about .about-scale__panel,
  .page-about .about-node__note,
  .page-about .about-hero__title {
    transition: none !important;
    transform: none !important;
  }
}