.page-about {
  --about-gap: clamp(28px, 5vw, 56px);
  --about-gap-lg: clamp(48px, 8vw, 92px);
  --about-rail-w: 46px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(20px, 4vw, 40px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-hero__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(2rem, 6.2vw, 4rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 0 0 clamp(16px, 3vw, 26px);
  text-wrap: balance;
}

.page-about .about-hero__lede {
  font-size: clamp(1rem, 1.9vw, 1.125rem);
  line-height: 1.8;
  color: var(--text-soft);
  margin: 0 0 clamp(24px, 4vw, 36px);
  max-width: 62ch;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .about-hero__badge {
  display: grid;
  align-content: center;
  gap: 2px;
  padding: clamp(22px, 4vw, 34px) clamp(20px, 4vw, 32px);
  background: linear-gradient(150deg, var(--graphite) 0%, var(--deep) 62%, var(--midnight) 100%);
  border: 1px solid var(--hair);
  clip-path: var(--cut-panel);
  position: relative;
  overflow: hidden;
  max-width: 360px;
}

.page-about .about-hero__badge::before {
  content: "";
  position: absolute;
  inset: auto -30% -40% auto;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(255, 106, 43, 0.42), transparent 68%);
  pointer-events: none;
}

.page-about .about-hero__badge-top {
  position: relative;
  font-size: 0.78rem;
  letter-spacing: 0.22em;
  color: var(--text-dim);
}

.page-about .about-hero__badge-num {
  position: relative;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(3.4rem, 11vw, 5.2rem);
  line-height: 1;
  font-weight: 700;
  color: var(--lava);
}

.page-about .about-hero__badge-unit {
  position: relative;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--white);
}

.page-about .about-hero__badge-foot {
  position: relative;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--hair);
  font-size: 0.86rem;
  color: var(--text-dim);
  line-height: 1.6;
}

/* ---------- 通栏图 ---------- */
.page-about .about-banner {
  margin: clamp(36px, 6vw, 64px) auto 0;
  max-width: var(--shell);
  padding: 0 var(--gutter);
}

.page-about .about-banner .media-frame__img,
.page-about .about-banner img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  display: block;
}

/* ---------- 我们做什么 ---------- */
.page-about .about-intro__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-intro__body p {
  color: var(--text-soft);
  line-height: 1.85;
  margin: 0 0 1.1em;
  max-width: 68ch;
}

.page-about .about-intro__body a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

.page-about .about-intro__side {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
  clip-path: var(--cut-panel);
}

.page-about .about-intro__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 20px;
  background: var(--graphite);
}

.page-about .about-intro__k {
  font-size: 0.76rem;
  letter-spacing: 0.16em;
  color: var(--text-dim);
}

.page-about .about-intro__v {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
}

/* ---------- 赛季节奏 ---------- */
.page-about .about-rhythm__intro,
.page-about .about-cover__intro,
.page-about .about-versions__intro,
.page-about .about-terms__intro {
  color: var(--text-soft);
  line-height: 1.85;
  max-width: 66ch;
  margin: 0 0 clamp(28px, 5vw, 44px);
}

.page-about .about-rhythm__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
}

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

.page-about .about-rhythm__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(24px, 4vw, 34px);
  counter-reset: rhythm;
}

.page-about .rhythm-item {
  position: relative;
  padding: clamp(20px, 3.4vw, 30px) clamp(20px, 3.4vw, 32px);
  background: var(--graphite);
  border-left: 3px solid var(--steel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-about .rhythm-item--hot {
  border-left-color: var(--lava);
}

.page-about .rhythm-item--cool {
  border-left-color: var(--cyan);
}

.page-about .rhythm-item__idx {
  display: block;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 0.82rem;
  letter-spacing: 0.16em;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.page-about .rhythm-item--hot .rhythm-item__idx {
  color: var(--lava);
}

.page-about .rhythm-item--cool .rhythm-item__idx {
  color: var(--cyan);
}

.page-about .rhythm-item__title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.15rem, 2.4vw, 1.42rem);
  color: var(--white);
  margin: 0 0 10px;
  letter-spacing: -0.01em;
}

.page-about .rhythm-item__text {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.85;
  font-size: 0.97rem;
}

.page-about .about-rhythm__figure {
  margin: clamp(32px, 5vw, 52px) 0 0;
}

.page-about .about-rhythm__figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 3;
  object-fit: cover;
  display: block;
}

/* ---------- 版本演进 ---------- */
.page-about .versions-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .ver-card {
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 18px 100%, 0 calc(100% - 18px));
  background: var(--graphite);
  border: 1px solid var(--hair);
  transition: transform 200ms ease;
}

.page-about .ver-card details > summary {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "tag name"
    "tag hint";
  align-items: center;
  column-gap: 16px;
  row-gap: 4px;
  padding: clamp(18px, 3vw, 24px) clamp(18px, 3.4vw, 30px);
  cursor: pointer;
  list-style: none;
}

.page-about .ver-card details > summary::-webkit-details-marker {
  display: none;
}

.page-about .ver-card__tag {
  grid-area: tag;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--midnight);
  background: var(--cyan);
  padding: 6px 10px;
  clip-path: var(--cut-btn);
}

.page-about .ver-card--v5 .ver-card__tag {
  background: var(--lava);
  color: var(--white);
}

.page-about .ver-card__name {
  grid-area: name;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(1.05rem, 2.2vw, 1.28rem);
  color: var(--white);
}

.page-about .ver-card__hint {
  grid-area: hint;
  font-size: 0.8rem;
  color: var(--text-dim);
}

.page-about .ver-card details[open] .ver-card__hint {
  color: var(--cyan);
}

.page-about .ver-card__body {
  padding: 0 clamp(18px, 3.4vw, 30px) clamp(20px, 3.4vw, 28px);
  animation: about-fade 320ms ease both;
}

.page-about .ver-card__body p {
  margin: 0 0 14px;
  color: var(--text-soft);
  line-height: 1.85;
  font-size: 0.96rem;
}

.page-about .ver-card__points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-about .ver-card__points li {
  position: relative;
  padding-left: 20px;
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.7;
}

.page-about .ver-card__points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 10px;
  height: 1px;
  background: var(--lava);
}

@keyframes about-fade {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- 数字墙 ---------- */
.page-about .about-cover__head {
  margin-bottom: clamp(28px, 5vw, 40px);
}

.page-about .number-wall {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-about .wall-cell {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: clamp(20px, 3.6vw, 32px) clamp(16px, 3vw, 28px);
  background: var(--deep);
  position: relative;
  overflow: hidden;
}

.page-about .wall-cell--lead {
  background: linear-gradient(160deg, var(--graphite), var(--deep));
}

.page-about .wall-cell--hot::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--lava);
}

.page-about .wall-cell__num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(2rem, 7vw, 3.1rem);
  font-weight: 700;
  line-height: 1;
  color: var(--white);
  letter-spacing: -0.01em;
}

.page-about .wall-cell--hot .wall-cell__num {
  color: var(--lava);
}

.page-about .wall-cell--lead .wall-cell__num {
  color: var(--cyan);
}

.page-about .wall-cell__unit {
  font-family: var(--font-head);
  font-size: 0.86rem;
  font-weight: 700;
  color: var(--text-dim);
}

.page-about .wall-cell__label {
  margin-top: 6px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  color: var(--white);
}

.page-about .wall-cell__note {
  font-size: 0.84rem;
  line-height: 1.65;
  color: var(--text-dim);
}

.page-about .about-cover__ways {
  margin-top: clamp(30px, 5vw, 48px);
  padding: clamp(22px, 3.6vw, 34px);
  border: 1px dashed var(--hair);
  background: rgba(20, 38, 60, 0.42);
}

.page-about .about-cover__ways-title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.1rem;
  color: var(--white);
  margin: 0 0 18px;
}

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

.page-about .about-cover__ways-list li {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: 12px;
  align-items: baseline;
  font-size: 0.94rem;
  color: var(--text-soft);
  line-height: 1.7;
}

.page-about .about-cover__ways-list .num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 0.82rem;
  color: var(--cyan);
  letter-spacing: 0.1em;
}

.page-about .about-cover__ways-foot {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--hair);
  font-size: 0.88rem;
  color: var(--text-dim);
  line-height: 1.7;
}

/* ---------- 团队 ---------- */
.page-about .about-team__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-team__body p {
  color: var(--text-soft);
  line-height: 1.85;
  margin: 0 0 1.1em;
  max-width: 66ch;
}

.page-about .team-ring-wrap {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: clamp(24px, 4vw, 40px);
  margin-top: clamp(24px, 4vw, 36px);
}

.page-about .team-ring {
  width: clamp(140px, 34vw, 190px);
  height: clamp(140px, 34vw, 190px);
  border-radius: 50%;
  background: conic-gradient(
    var(--lava) 0 29%,
    var(--cyan) 29% 53%,
    var(--steel) 53% 81%,
    var(--graphite) 81% 100%
  );
  display: grid;
  place-items: center;
  flex: 0 0 auto;
}

.page-about .team-ring__core {
  width: 62%;
  height: 62%;
  border-radius: 50%;
  background: var(--midnight);
  display: grid;
  place-items: center;
  align-content: center;
  gap: 2px;
}

.page-about .team-ring__num {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1;
}

.page-about .team-ring__unit {
  font-size: 0.76rem;
  color: var(--text-dim);
  letter-spacing: 0.16em;
}

.page-about .team-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  flex: 1 1 200px;
}

.page-about .team-legend__item {
  display: grid;
  grid-template-columns: 12px 1fr auto;
  gap: 12px;
  align-items: center;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--hair-soft);
}

.page-about .team-legend__dot {
  width: 12px;
  height: 12px;
  display: block;
}

.page-about .team-legend__dot--a { background: var(--lava); }
.page-about .team-legend__dot--b { background: var(--cyan); }
.page-about .team-legend__dot--c { background: var(--steel); }
.page-about .team-legend__dot--d { background: var(--graphite); border: 1px solid var(--hair); }

.page-about .team-legend__name {
  font-size: 0.92rem;
  color: var(--text-soft);
}

.page-about .team-legend__val {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-team__figure {
  margin: 0;
}

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

/* ---------- 术语 ---------- */
.page-about .about-terms__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-about .term-card {
  background: var(--deep);
  padding: clamp(20px, 3.6vw, 30px);
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-top: 2px solid transparent;
}

.page-about .term-card--hot { border-top-color: var(--lava); }
.page-about .term-card--cool { border-top-color: var(--cyan); }

.page-about .term-card__k {
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  color: var(--text-dim);
}

.page-about .term-card__v {
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.4rem, 3.6vw, 1.9rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.15;
}

.page-about .term-card--hot .term-card__v { color: var(--lava); }
.page-about .term-card--cool .term-card__v { color: var(--cyan); }

.page-about .term-card__d {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--text-dim);
}

/* ---------- 合作 ---------- */
.page-about .about-partners__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
  align-items: start;
}

.page-about .about-partners__body p {
  color: var(--text-soft);
  line-height: 1.85;
  margin: 0 0 1.1em;
  max-width: 64ch;
}

.page-about .about-partners__body a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

.page-about .partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hair);
  border: 1px solid var(--hair);
}

.page-about .partner-item {
  background: var(--graphite);
  padding: clamp(18px, 3.2vw, 26px) clamp(18px, 3.2vw, 28px);
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 16px;
  row-gap: 4px;
  align-items: baseline;
}

.page-about .partner-item--hot {
  background: linear-gradient(150deg, var(--lava-deep), var(--graphite) 78%);
}

.page-about .partner-item__num {
  grid-row: span 2;
  font-family: var(--font-num);
  font-variant-numeric: tabular-nums;
  font-size: clamp(1.8rem, 5vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-about .partner-item--hot .partner-item__num {
  color: var(--white);
}

.page-about .partner-item__label {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  color: var(--white);
}

.page-about .partner-item__note {
  font-size: 0.86rem;
  line-height: 1.65;
  color: var(--text-dim);
}

.page-about .partner-item--hot .partner-item__note {
  color: var(--mist);
}

/* ---------- 服务 ---------- */
.page-about .about-service__panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
  align-items: center;
  padding: clamp(26px, 4.6vw, 48px);
  background: linear-gradient(140deg, var(--graphite) 0%, var(--deep) 58%, var(--midnight) 100%);
  border: 1px solid var(--hair);
}

.page-about .about-service__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.4rem, 3.4vw, 2rem);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 0 0 14px;
}

.page-about .about-service__text {
  margin: 0;
  color: var(--text-soft);
  line-height: 1.85;
  max-width: 62ch;
}

.page-about .about-service__text a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

.page-about .about-service__act {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ---------- 平板 ---------- */
@media (min-width: 700px) {
  .page-about .about-intro__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 5vw, 56px);
  }

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

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

  .page-about .about-service__panel {
    grid-template-columns: minmax(0, 1fr) auto;
  }

  .page-about .about-cover__ways-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 32px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 1000px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: clamp(40px, 6vw, 72px);
    align-items: center;
  }

  .page-about .about-rhythm__grid {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    column-gap: clamp(24px, 4vw, 44px);
  }

  .page-about .about-rhythm__rail {
    display: block;
    position: relative;
    align-self: stretch;
  }

  .page-about .rail-line {
    position: absolute;
    top: 6px;
    bottom: 6px;
    left: 9px;
    width: 1px;
    background: linear-gradient(180deg, var(--lava), var(--cyan) 55%, var(--steel));
    opacity: 0.6;
  }

  .page-about .rail-tick {
    position: absolute;
    left: 0;
    width: 19px;
    height: 1px;
    background: var(--steel);
    opacity: 0.75;
  }

  .page-about .rail-tick::after {
    content: "";
    position: absolute;
    right: -17px;
    top: -3px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--deep);
    border: 1px solid var(--steel);
  }

  .page-about .rail-tick--1 { top: 8%; }
  .page-about .rail-tick--2 { top: 34%; }
  .page-about .rail-tick--3 { top: 60%; }
  .page-about .rail-tick--4 { top: 86%; }

  .page-about .rail-tick--1::after { border-color: var(--lava); }
  .page-about .rail-tick--3::after { border-color: var(--lava); }
  .page-about .rail-tick--2::after,
  .page-about .rail-tick--4::after { border-color: var(--cyan); }

  .page-about .about-rhythm__list {
    gap: clamp(30px, 4vw, 46px);
  }

  .page-about .about-team__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(36px, 6vw, 64px);
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(36px, 6vw, 64px);
  }

  .page-about .number-wall {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .wall-cell--lead {
    grid-column: span 2;
  }

  .page-about .wall-cell--hot {
    grid-column: span 2;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .ver-card__body {
    animation: none;
  }

  .page-about .ver-card {
    transition: none;
  }
}
<<<END>>>