.page-about {
  --about-section-pad: clamp(56px, 7vw, 104px);
  background: var(--ink);
  color: var(--frost);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about h2 {
  font-family: var(--font-display);
  font-weight: 800;
  letter-spacing: -.02em;
  font-size: clamp(27px, 4.3vw, 45px);
  line-height: 1.14;
  margin: 0 0 clamp(14px, 1.8vw, 20px);
  color: var(--frost);
}

.page-about h3 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(16px, 1.8vw, 20px);
  line-height: 1.36;
  margin: 0 0 10px;
  color: var(--frost);
}

.page-about p {
  margin: 0 0 1em;
  line-height: 1.78;
}

.page-about .eyebrow {
  display: block;
  color: var(--gold);
  margin-bottom: 14px;
}

/* ---------- 首屏 ---------- */
.about-hero {
  position: relative;
  padding-top: clamp(20px, 3vw, 36px);
  background:
    radial-gradient(120% 100% at 88% 0%, rgba(42, 36, 80, .92) 0%, rgba(42, 36, 80, 0) 62%),
    radial-gradient(90% 70% at 0% 110%, rgba(18, 70, 60, .55) 0%, rgba(18, 70, 60, 0) 62%),
    var(--ink);
  border-bottom: 1px solid var(--gold-line);
}

.about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 44px);
  padding-bottom: clamp(30px, 4vw, 54px);
}

.about-hero__lead {
  min-width: 0;
}

.about-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -.025em;
  font-size: clamp(33px, 7.2vw, 76px);
  line-height: 1.05;
  margin: 0 0 clamp(16px, 2vw, 26px);
  color: var(--frost);
}

.about-hero h1 em {
  font-style: normal;
  display: inline-block;
  border-bottom: 5px solid var(--gold);
  padding-bottom: 2px;
}

.about-hero__intro {
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.85;
  color: rgba(234, 242, 250, .82);
  max-width: 35em;
}

.about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.about-hero__index {
  padding: clamp(20px, 2.8vw, 30px);
  border: 1px solid var(--gold-line);
  border-radius: 2px;
  background: linear-gradient(160deg, rgba(234, 242, 250, .10), rgba(234, 242, 250, .03));
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.about-hero__index-title {
  font-size: 11px;
  letter-spacing: .22em;
  color: var(--gold);
  margin: 0 0 18px;
}

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

.about-hero__facts li {
  display: grid;
  grid-template-columns: 5.4em minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--hairline);
  font-size: 14px;
  line-height: 1.6;
  color: rgba(234, 242, 250, .82);
}

.about-hero__facts li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.about-hero__facts .mono {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--gold);
}

.about-hero__figure {
  margin: 0;
  border-top: 1px solid var(--gold-line);
}

.about-hero__figure img {
  display: block;
  width: 100%;
  height: clamp(180px, 26vw, 320px);
  object-fit: cover;
}

/* ---------- 01 出发点 ---------- */
.about-why {
  padding-block: var(--about-section-pad);
  background: var(--ink);
}

.about-why__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 54px);
  align-items: start;
}

.about-why__head {
  min-width: 0;
}

.about-why__lede {
  font-size: clamp(14.5px, 1.5vw, 17px);
  line-height: 1.85;
  color: rgba(234, 242, 250, .78);
  max-width: 36em;
}

.about-why__cards {
  display: grid;
  gap: clamp(12px, 1.6vw, 18px);
  min-width: 0;
}

.about-why__card {
  position: relative;
  padding: clamp(20px, 2.4vw, 26px) clamp(18px, 2.4vw, 26px) clamp(18px, 2.4vw, 26px) clamp(56px, 6vw, 74px);
  background: linear-gradient(150deg, rgba(30, 107, 88, .38), rgba(18, 70, 60, .62));
  border: 1px solid rgba(217, 169, 76, .22);
  border-radius: 2px;
}

.about-why__no {
  position: absolute;
  left: clamp(16px, 2vw, 22px);
  top: clamp(21px, 2.4vw, 27px);
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--gold);
}

.about-why__card h3 {
  font-size: clamp(16px, 1.7vw, 18px);
  margin-bottom: 8px;
}

.about-why__card p {
  font-size: 14.2px;
  line-height: 1.75;
  color: rgba(234, 242, 250, .78);
  margin: 0;
}

/* ---------- 02 发展历程 ---------- */
.about-time {
  padding-block: var(--about-section-pad);
  background: linear-gradient(180deg, var(--ink) 0%, var(--indigo) 14%, var(--indigo) 86%, var(--ink) 100%);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.about-time__head {
  max-width: 46em;
  margin-bottom: clamp(22px, 3vw, 36px);
}

.about-time__head p {
  color: rgba(234, 242, 250, .78);
  font-size: 15px;
}

.about-time__figure {
  margin: 0 0 clamp(26px, 3.6vw, 42px);
  border: 1px solid var(--gold-line);
  overflow: hidden;
}

.about-time__figure img {
  display: block;
  width: 100%;
  height: clamp(160px, 24vw, 300px);
  object-fit: cover;
}

.about-time__list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 clamp(24px, 4vw, 52px);
  border-left: 1px solid var(--gold-line);
}

.about-time__item {
  position: relative;
  padding-bottom: clamp(8px, 1.4vw, 14px);
}

.about-time__item::before {
  content: "";
  position: absolute;
  top: 27px;
  left: calc(-1 * clamp(24px, 4vw, 52px) - 6px);
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--indigo);
  border: 1px solid var(--gold);
  box-sizing: content-box;
}

.about-time__node summary {
  list-style: none;
  cursor: pointer;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 14px;
  align-items: center;
  padding: clamp(12px, 1.6vw, 16px) clamp(13px, 1.8vw, 18px);
  border: 1px solid transparent;
  border-radius: 2px;
  transition: background-color .18s ease, border-color .18s ease;
}

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

.about-time__node summary:hover {
  background: rgba(234, 242, 250, .06);
  border-color: rgba(217, 169, 76, .28);
}

.about-time__node summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

.about-time__line {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  min-width: 0;
}

.about-time__year {
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--gold);
  font-weight: 700;
}

.about-time__stage {
  font-size: 11.5px;
  letter-spacing: .18em;
  color: rgba(234, 242, 250, .5);
  padding: 2px 8px;
  border: 1px solid var(--hairline);
}

.about-time__headline {
  flex: 1 1 14em;
  min-width: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.45;
  color: var(--frost);
}

.about-time__arrow {
  width: 9px;
  height: 9px;
  border-right: 1.5px solid var(--gold);
  border-bottom: 1.5px solid var(--gold);
  transform: rotate(45deg) translate(-2px, -2px);
  transition: transform .2s ease;
  flex: none;
}

.about-time__node[open] .about-time__arrow {
  transform: rotate(-135deg) translate(-2px, -2px);
}

.about-time__body {
  padding: 2px clamp(13px, 1.8vw, 18px) clamp(10px, 1.4vw, 16px);
}

.about-time__body p {
  font-size: 14.2px;
  line-height: 1.8;
  color: rgba(234, 242, 250, .76);
  margin: 0;
}

/* ---------- 03 团队 ---------- */
.about-team {
  padding-block: var(--about-section-pad);
  background: var(--ink);
}

.about-team__head {
  max-width: 48em;
  margin-bottom: clamp(24px, 3.2vw, 40px);
}

.about-team__head p {
  color: rgba(234, 242, 250, .78);
  font-size: 15px;
}

.about-team__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 40px);
  align-items: start;
}

.about-team__cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(12px, 1.6vw, 18px);
  min-width: 0;
}

.about-team__card {
  position: relative;
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--felt);
  border: 1px solid rgba(217, 169, 76, .2);
  border-top: 2px solid var(--gold);
  border-radius: 0 0 2px 2px;
  transition: transform .18s ease, background-color .18s ease, border-color .18s ease;
}

.about-team__card:hover,
.about-team__card:focus-within {
  background: #16574a;
  border-color: rgba(217, 169, 76, .5);
  transform: translateY(-3px);
}

.about-team__tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--gold);
  padding-bottom: 9px;
  margin-bottom: 12px;
  border-bottom: 1px solid rgba(217, 169, 76, .3);
}

.about-team__card h3 {
  font-size: clamp(16px, 1.6vw, 18px);
  margin-bottom: 8px;
}

.about-team__card p {
  font-size: 13.8px;
  line-height: 1.74;
  color: rgba(234, 242, 250, .76);
  margin: 0;
}

.about-team__figure {
  margin: 0;
  min-width: 0;
}

.about-team__figure img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--gold-line);
}

.about-team__figure figcaption {
  margin-top: 12px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--graphite);
}

/* ---------- 04 上线流程 ---------- */
.about-flow {
  padding-block: var(--about-section-pad);
  background: var(--paper);
}

.page-about .about-flow h2 {
  color: #0B1A2B;
}

.page-about .about-flow h3 {
  color: #0B1A2B;
}

.page-about .about-flow .eyebrow {
  color: #8A6118;
}

.about-flow__head {
  max-width: 48em;
  margin-bottom: clamp(24px, 3.2vw, 40px);
}

.about-flow__head p {
  color: #46586b;
  font-size: 15px;
}

.about-flow__steps {
  list-style: none;
  margin: 0 0 clamp(20px, 3vw, 32px);
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(12px, 1.6vw, 16px);
  align-items: start;
}

.about-flow__step {
  position: relative;
  padding: clamp(16px, 2.2vw, 24px);
  background: #FFFFFF;
  border: 1px solid rgba(11, 26, 43, .12);
  border-top: 3px solid var(--felt-2);
  border-radius: 0 0 3px 3px;
}

.about-flow__num {
  display: block;
  font-size: 12.5px;
  letter-spacing: .14em;
  color: #1E6B58;
  margin-bottom: 10px;
}

.about-flow__step h3 {
  font-size: clamp(15.5px, 1.6vw, 18px);
  margin-bottom: 8px;
}

.about-flow__step p {
  font-size: 13.6px;
  line-height: 1.74;
  color: #46586b;
  margin: 0;
}

.about-flow__note {
  display: block;
  padding: 14px 18px;
  margin: 0;
  background: rgba(30, 107, 88, .1);
  border-left: 3px solid var(--felt-2);
  font-size: 14px;
  line-height: 1.78;
  color: #1a3a32;
}

/* ---------- 05 赛季节奏 ---------- */
.about-season {
  padding-block: var(--about-section-pad);
  background:
    radial-gradient(90% 70% at 100% 0%, rgba(226, 74, 124, .13), transparent 62%),
    var(--ink);
  border-top: 1px solid var(--hairline);
}

.about-season__inner {
  min-width: 0;
}

.about-season__head {
  max-width: 48em;
}

.about-season__head p {
  color: rgba(234, 242, 250, .78);
  font-size: 15px;
}

.about-season__track {
  display: grid;
  grid-template-columns: repeat(8, minmax(0, 1fr));
  gap: 4px;
  margin: clamp(20px, 3vw, 32px) 0 clamp(24px, 3.4vw, 38px);
}

.about-season__tick {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  font-size: 10.5px;
  letter-spacing: .08em;
  color: rgba(234, 242, 250, .55);
  background: rgba(234, 242, 250, .05);
  border: 1px solid var(--hairline);
}

.about-season__tick:first-child {
  border-color: rgba(226, 74, 124, .55);
  color: var(--rose);
}

.about-season__tick:last-child {
  border-color: rgba(217, 169, 76, .55);
  color: var(--gold);
}

.about-season__facts {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.2vw, 26px);
}

.about-season__facts li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding-top: 16px;
  border-top: 1px solid var(--hairline);
}

.about-season__num {
  font-size: clamp(32px, 4.4vw, 50px);
  line-height: 1;
  font-weight: 700;
  color: var(--gold);
}

.about-season__facts h3 {
  font-size: 15px;
  margin-bottom: 6px;
}

.about-season__facts p {
  font-size: 13.4px;
  line-height: 1.72;
  color: rgba(234, 242, 250, .72);
  margin: 0;
}

.about-season__note {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: clamp(15px, 2vw, 22px);
  border: 1px solid var(--gold-line);
  background: var(--glass);
  font-size: 14px;
  line-height: 1.78;
  color: rgba(234, 242, 250, .8);
}

/* ---------- 06 内容合作 ---------- */
.about-coop {
  padding-block: var(--about-section-pad);
  background: linear-gradient(180deg, var(--ink), #0d2233 55%, var(--ink));
}

.about-coop__layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 3.4vw, 44px);
  align-items: start;
}

.about-coop__main {
  min-width: 0;
}

.about-coop__main p {
  font-size: 15px;
  line-height: 1.82;
  color: rgba(234, 242, 250, .8);
  max-width: 42em;
}

.page-about .about-coop__main a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid var(--gold-line);
}

.page-about .about-coop__main a:hover {
  border-bottom-color: var(--gold);
}

.about-coop__aside {
  padding: clamp(20px, 2.6vw, 28px);
  background: var(--felt);
  border: 1px solid rgba(217, 169, 76, .24);
  border-radius: 2px;
}

.about-coop__aside-title {
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--gold);
  margin: 0 0 16px;
}

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

.about-coop__aside li {
  display: grid;
  grid-template-columns: 2.2em minmax(0, 1fr);
  gap: 10px;
  font-size: 13.6px;
  line-height: 1.6;
  color: rgba(234, 242, 250, .84);
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(234, 242, 250, .1);
}

.about-coop__aside li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.about-coop__aside li .mono {
  color: var(--gold);
  font-size: 12px;
}

/* ---------- 收尾 ---------- */
.about-next {
  padding-block: clamp(40px, 6vw, 76px);
  background: var(--ink);
  border-top: 1px solid var(--gold-line);
}

.about-next h2 {
  font-size: clamp(24px, 3.4vw, 36px);
  margin-bottom: 0;
}

.about-next__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  margin-top: clamp(18px, 2.4vw, 28px);
}

.about-next__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 15px 18px;
  border: 1px solid var(--hairline);
  background: var(--glass);
  color: var(--frost);
  text-decoration: none;
  font-size: 15px;
  transition: border-color .18s ease, background-color .18s ease;
}

.about-next__link::after {
  content: "\2192";
  color: var(--gold);
  font-size: 16px;
  line-height: 1;
  flex: none;
}

.about-next__link:hover,
.about-next__link:focus-visible {
  border-color: var(--gold-line);
  background: var(--glass-strong);
}

/* ---------- 响应式 ---------- */
@media (min-width: 600px) {
  .about-team__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 760px) {
  .about-season__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .about-flow__steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .about-flow__step:nth-child(2) {
    margin-top: 24px;
  }

  .about-flow__step:nth-child(3) {
    margin-top: 48px;
  }

  .about-flow__step:nth-child(4) {
    margin-top: 72px;
  }
}

@media (min-width: 900px) {
  .about-why__layout {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }

  .about-why__card:nth-child(2) {
    transform: translateX(8px);
  }

  .about-why__card:nth-child(3) {
    transform: translateX(16px);
  }

  .about-coop__layout {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, .65fr);
  }
}

@media (min-width: 940px) {
  .about-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    align-items: end;
  }
}

@media (min-width: 960px) {
  .about-team__layout {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .85fr);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .about-team__card,
  .about-time__arrow,
  .about-time__node summary,
  .about-next__link {
    transition: none;
  }

  .about-team__card:hover,
  .about-team__card:focus-within {
    transform: none;
  }
}