.page-about {
  --about-line: var(--ice-14);
  --about-line-soft: var(--ice-08);
  --about-line-ink: rgba(10, 16, 24, 0.14);
  --about-gap: clamp(18px, 3vw, 34px);
  background: var(--sea);
  color: var(--ice);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}

.page-about img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-about :focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.25;
  margin: 0;
  letter-spacing: 0.01em;
}

.page-about a {
  color: inherit;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  padding-block: clamp(26px, 4vw, 46px) clamp(46px, 7vw, 92px);
  border-bottom: 1px solid var(--about-line);
  background:
    radial-gradient(120% 80% at 88% -12%, rgba(54, 214, 195, 0.16), transparent 62%),
    radial-gradient(90% 70% at 6% 112%, rgba(255, 107, 74, 0.15), transparent 66%),
    var(--sea);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image: repeating-linear-gradient(115deg, rgba(220, 230, 239, 0.05) 0 1px, transparent 1px 10px);
  opacity: 0.6;
}

.page-about .about-crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--ice-64);
}

.page-about .about-crumbs a {
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  color: var(--coral-soft);
  border-bottom-color: var(--coral-soft);
}

.page-about .about-crumbs__sep {
  color: var(--sand);
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--about-gap);
  align-items: start;
  margin-top: clamp(28px, 5vw, 54px);
}

.page-about .about-kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.22em;
  color: var(--sand);
  text-transform: uppercase;
}

.page-about .about-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.3rem, 7.2vw, 5rem);
  line-height: 1.04;
  letter-spacing: 0.01em;
  margin: 18px 0 0;
}

.page-about .about-hero__title span {
  color: var(--coral);
  display: inline-block;
  padding-bottom: 6px;
  border-bottom: 6px solid rgba(255, 107, 74, 0.24);
}

.page-about .about-hero__lead {
  max-width: 34em;
  margin: 22px 0 0;
  color: var(--ice-64);
  font-size: clamp(1rem, 1.15vw, 1.09rem);
}

.page-about .about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(20px, 4vw, 54px);
  list-style: none;
  margin: 32px 0 0;
  padding: 20px 0 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-hero__facts strong {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  line-height: 1;
  color: var(--sand);
}

.page-about .about-hero__facts span {
  display: block;
  margin-top: 8px;
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--ice-64);
}

.page-about .about-hero__aside {
  background: var(--sea-2);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  padding: 22px 20px 20px;
  box-shadow: var(--shadow-panel);
}

.page-about .about-index__title {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  color: var(--sand);
  text-transform: uppercase;
}

.page-about .about-index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-index a {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 9px 10px;
  font-size: 0.93rem;
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-index a span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--coral);
}

.page-about .about-index a:hover,
.page-about .about-index a:focus-visible {
  background: rgba(255, 107, 74, 0.1);
  border-left-color: var(--coral);
  color: #fff;
}

.page-about .about-index__cta {
  margin-top: 16px;
  width: 100%;
}

/* ---------- 按钮 ---------- */
.page-about .about-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 22px;
  font-family: var(--font-head);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-decoration: none;
  border-radius: var(--radius-s);
  border: 1px solid transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-btn--coral {
  background: var(--coral);
  color: var(--sea-deep);
}

.page-about .about-btn--coral:hover,
.page-about .about-btn--coral:focus-visible {
  background: var(--coral-soft);
  transform: translateY(-2px);
}

.page-about .about-btn--ghost {
  border-color: var(--ice-24);
  color: var(--ice);
}

.page-about .about-btn--ghost:hover,
.page-about .about-btn--ghost:focus-visible {
  border-color: var(--teal);
  color: var(--teal);
  transform: translateY(-2px);
}

/* ---------- 章节框架 ---------- */
.page-about .about-chapter {
  padding-block: clamp(46px, 7vw, 90px);
  border-top: 1px solid var(--about-line-soft);
}

.page-about .about-chapter__grid {
  display: grid;
  gap: clamp(14px, 2.2vw, 24px);
  grid-template-areas:
    "num"
    "head"
    "body"
    "note";
}

.page-about .about-chapter__num {
  grid-area: num;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 6.4vw, 4.2rem);
  line-height: 0.9;
  color: var(--sand);
}

.page-about .about-chapter__head {
  grid-area: head;
}

.page-about .about-chapter__head h2 {
  font-size: clamp(1.55rem, 3.1vw, 2.45rem);
}

.page-about .about-chapter__sub {
  margin: 12px 0 0;
  max-width: 28em;
  color: var(--ice-64);
  font-size: 0.98rem;
}

.page-about .about-chapter__body {
  grid-area: body;
  min-width: 0;
  margin-top: 8px;
}

.page-about .about-chapter__body p {
  max-width: 36em;
  margin: 0 0 1.05em;
  color: var(--ice-64);
}

.page-about .about-chapter__body .about-lead {
  color: var(--ice);
  font-size: 1.05rem;
}

.page-about .about-chapter__note {
  grid-area: note;
  margin-top: 10px;
  padding-top: 14px;
  border-top: 1px solid var(--about-line);
  font-size: 0.88rem;
  color: var(--ice-64);
}

.page-about .about-chapter__note p {
  margin: 0 0 0.7em;
}

.page-about .about-note__label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--sand);
  text-transform: uppercase;
}

.page-about .about-note__link a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(54, 214, 195, 0.35);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-note__link a:hover,
.page-about .about-note__link a:focus-visible {
  color: var(--coral-soft);
  border-bottom-color: var(--coral-soft);
}

/* 纸白章节 */
.page-about .about-chapter--paper {
  background: var(--paper);
  color: var(--ink-soft);
  border-top-color: transparent;
}

.page-about .about-chapter--paper .about-chapter__num {
  color: var(--coral);
}

.page-about .about-chapter--paper .about-chapter__head h2 {
  color: var(--ink);
}

.page-about .about-chapter--paper .about-chapter__sub,
.page-about .about-chapter--paper .about-chapter__body p,
.page-about .about-chapter--paper .about-chapter__note {
  color: var(--ink-64);
}

.page-about .about-chapter--paper .about-chapter__body .about-lead {
  color: var(--ink);
}

.page-about .about-chapter--paper .about-chapter__note {
  border-top-color: var(--about-line-ink);
}

.page-about .about-chapter--paper .about-note__label {
  color: #9a7a3f;
}

.page-about .about-chapter--deep {
  background: var(--sea-deep);
}

.page-about .about-chapter--contact {
  background:
    radial-gradient(100% 90% at 100% 0%, rgba(255, 107, 74, 0.12), transparent 60%),
    var(--sea-2);
}

/* ---------- 要点列表 ---------- */
.page-about .about-points {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--about-line);
}

.page-about .about-points li {
  background: var(--sea-2);
  padding: 16px 18px;
}

.page-about .about-points strong {
  display: block;
  font-family: var(--font-head);
  font-size: 1.02rem;
  letter-spacing: 0.04em;
  color: var(--coral-soft);
}

.page-about .about-points p {
  margin: 6px 0 0;
  font-size: 0.93rem;
}

/* ---------- 图片 ---------- */
.page-about .about-figure {
  margin: 0 0 clamp(22px, 3vw, 32px);
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--sea-3);
  box-shadow: var(--shadow-panel);
}

.page-about .about-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-about .about-figure--wide img {
  aspect-ratio: 3 / 2;
}

.page-about .about-figure__cap {
  padding: 10px 14px;
  border-top: 1px solid var(--about-line);
  background: rgba(4, 18, 31, 0.55);
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--ice-64);
}

.page-about .about-chapter--paper .about-figure {
  border-color: var(--about-line-ink);
  background: #fff;
  box-shadow: 0 14px 34px -26px rgba(7, 28, 51, 0.9);
}

.page-about .about-chapter--paper .about-figure__cap {
  border-top-color: var(--about-line-ink);
  background: #eef2f6;
  color: var(--slate);
}

/* ---------- 联赛列表 ---------- */
.page-about .about-leagues {
  margin-top: 26px;
}

.page-about .about-leagues__title {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  color: #9a7a3f;
  text-transform: uppercase;
}

.page-about .about-leagues__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  border: 1px solid var(--about-line-ink);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--about-line-ink);
}

.page-about .about-leagues__list li {
  display: flex;
  gap: 14px;
  align-items: baseline;
  padding: 12px 16px;
  background: #fff;
  font-size: 0.95rem;
  color: var(--ink-soft);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-leagues__list li:hover {
  background: #f0f5f9;
  color: var(--ink);
}

.page-about .about-leagues__list span {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--teal);
}

/* ---------- 团队角色切换 ---------- */
.page-about .about-tabs {
  position: relative;
  margin: 26px 0 clamp(24px, 3.4vw, 34px);
}

.page-about .about-tabs__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  clip-path: inset(50%);
  pointer-events: none;
}

.page-about .about-tabs__labels {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.page-about .about-tabs__labels label {
  padding: 8px 16px;
  border: 1px solid var(--ice-24);
  border-radius: 999px;
  font-family: var(--font-head);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  color: var(--ice-64);
  cursor: pointer;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-about .about-tabs__labels label:hover {
  border-color: var(--coral);
  color: var(--ice);
}

.page-about .about-tabs__input:focus-visible ~ .about-tabs__labels {
  outline: 2px solid var(--teal);
  outline-offset: 4px;
  border-radius: var(--radius-m);
}

.page-about .about-tabs__input:nth-of-type(1):checked ~ .about-tabs__labels label:nth-child(1),
.page-about .about-tabs__input:nth-of-type(2):checked ~ .about-tabs__labels label:nth-child(2),
.page-about .about-tabs__input:nth-of-type(3):checked ~ .about-tabs__labels label:nth-child(3) {
  background: var(--coral);
  border-color: var(--coral);
  color: var(--sea-deep);
}

.page-about .about-tabs__panel {
  display: none;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  background: var(--sea-2);
  padding: 20px 20px 16px;
  box-shadow: var(--shadow-panel);
}

.page-about .about-tabs__input:nth-of-type(1):checked ~ .about-tabs__panels .about-tabs__panel:nth-child(1),
.page-about .about-tabs__input:nth-of-type(2):checked ~ .about-tabs__panels .about-tabs__panel:nth-child(2),
.page-about .about-tabs__input:nth-of-type(3):checked ~ .about-tabs__panels .about-tabs__panel:nth-child(3) {
  display: block;
}

.page-about .about-tabs__panel h3 {
  font-size: 1.15rem;
  color: var(--coral-soft);
  margin-bottom: 10px;
}

.page-about .about-tabs__panel p {
  margin: 0 0 0.8em;
  font-size: 0.95rem;
}

.page-about .about-tabs__meta {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--about-line);
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.06em;
  color: var(--teal);
}

/* ---------- 三审步骤 ---------- */
.page-about .about-steps {
  list-style: none;
  margin: 22px 0 clamp(24px, 3.4vw, 34px);
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  background: var(--sea-2);
  box-shadow: var(--shadow-float);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-steps li:hover {
  border-color: var(--coral);
  transform: translateY(-2px);
}

.page-about .about-steps__n {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--sand);
  padding-top: 4px;
}

.page-about .about-steps strong {
  display: block;
  font-family: var(--font-head);
  font-size: 1.02rem;
  letter-spacing: 0.04em;
  color: var(--ice);
}

.page-about .about-steps p {
  margin: 6px 0 0;
  font-size: 0.93rem;
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  display: grid;
  gap: 10px;
  margin: 6px 0 0 6px;
  padding-left: clamp(14px, 3vw, 26px);
  border-left: 1px solid var(--ice-24);
}

.page-about .about-stage {
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  background: var(--sea-2);
  box-shadow: var(--shadow-panel);
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-stage:hover {
  border-color: var(--ice-24);
}

.page-about .about-stage__summary {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: baseline;
  padding: 15px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-about .about-stage__num {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.05rem;
  letter-spacing: 0.1em;
  color: var(--sand);
}

.page-about .about-stage__label {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.08rem;
  letter-spacing: 0.03em;
  color: var(--ice);
}

.page-about .about-stage__hint {
  margin-left: auto;
  padding: 2px 10px;
  border: 1px solid var(--ice-24);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--teal);
}

.page-about .about-stage__body p {
  margin: 0;
  padding: 0 18px 16px;
  max-width: 36em;
  font-size: 0.93rem;
  color: var(--ice-64);
}

.page-about .about-stage[open] .about-stage__summary {
  border-bottom: 1px solid var(--about-line);
  margin-bottom: 14px;
}

/* ---------- 合作与荣誉 ---------- */
.page-about .about-stats {
  list-style: none;
  margin: 24px 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-stats li {
  padding: 16px 18px;
  border: 1px solid var(--about-line-ink);
  border-radius: var(--radius-m);
  background: #fff;
  box-shadow: 0 14px 30px -26px rgba(7, 28, 51, 0.85);
}

.page-about .about-stats strong {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3vw, 2rem);
  line-height: 1.1;
  color: var(--coral);
}

.page-about .about-stats span {
  display: block;
  margin-top: 6px;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--slate);
}

.page-about .about-honors__title {
  margin: 30px 0 14px;
  font-family: var(--font-head);
  font-size: 0.76rem;
  letter-spacing: 0.2em;
  color: #9a7a3f;
  text-transform: uppercase;
}

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

.page-about .about-honors li {
  padding: 16px 18px;
  border: 1px solid var(--about-line-ink);
  border-radius: var(--radius-m);
  background: #fff;
  box-shadow: 0 14px 30px -26px rgba(7, 28, 51, 0.85);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-honors li:hover {
  border-color: var(--coral);
  transform: translateY(-2px);
}

.page-about .about-honors__badge {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  color: #9a7a3f;
}

.page-about .about-honors strong {
  display: block;
  font-family: var(--font-head);
  font-size: 1.02rem;
  letter-spacing: 0.03em;
  color: var(--ink);
}

.page-about .about-honors p {
  margin: 6px 0 0;
  font-size: 0.9rem;
  color: var(--ink-64);
}

/* ---------- 联络 ---------- */
.page-about .about-contact {
  display: grid;
  gap: 10px;
  margin: 22px 0 24px;
}

.page-about .about-contact__row {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  border: 1px solid var(--about-line);
  border-radius: var(--radius-m);
  background: rgba(4, 18, 31, 0.38);
}

.page-about .about-contact__label {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--sand);
}

.page-about .about-contact__value {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--ice);
  overflow-wrap: anywhere;
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-legal {
  margin: 22px 0 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  color: var(--sand);
}

/* ---------- 桌面栅格 ---------- */
@media (min-width: 640px) {
  .page-about .about-points {
    grid-template-columns: 1fr;
  }

  .page-about .about-leagues__list {
    grid-template-columns: 1fr 1fr;
  }

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1fr) 292px;
    gap: clamp(32px, 5vw, 64px);
  }
}

@media (min-width: 980px) {
  .page-about .about-chapter__grid {
    grid-template-columns: 92px minmax(0, 1fr) 250px;
    grid-template-areas:
      "num head note"
      "num .page-about note";
    column-gap: clamp(24px, 3.4vw, 48px);
    row-gap: clamp(10px, 1.6vw, 18px);
    align-items: start;
  }

  .page-about .about-chapter__num {
    font-size: clamp(3rem, 4.6vw, 4.4rem);
  }

  .page-about .about-chapter__note {
    margin-top: 0;
    padding-top: 0;
    border-top: 0;
    padding-left: 20px;
    border-left: 1px solid var(--about-line);
  }

  .page-about .about-chapter--paper .about-chapter__note {
    border-left-color: var(--about-line-ink);
  }

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

  .page-about .about-figure {
    margin-top: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-btn,
  .page-about .about-steps li,
  .page-about .about-honors li,
  .page-about .about-index a {
    transition: none;
  }

  .page-about .about-btn:hover,
  .page-about .about-steps li:hover,
  .page-about .about-honors li:hover {
    transform: none;
  }
}
<<<END>>>