.page-about {
  --about-section-space: clamp(56px, 9vw, 118px);
  color: var(--white);
}

/* ============ HERO ============ */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(28px, 4.5vw, 48px) 0 clamp(48px, 7vw, 84px);
  background:
    radial-gradient(120% 92% at 86% -8%, rgba(34, 224, 214, 0.18), transparent 58%),
    radial-gradient(84% 74% at 2% 110%, rgba(90, 62, 140, 0.42), transparent 62%),
    var(--ink-deep);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -32%;
  right: -12%;
  width: min(58vw, 620px);
  aspect-ratio: 1 / 1;
  background: linear-gradient(148deg, rgba(34, 224, 214, 0.16), rgba(90, 62, 140, 0.1) 56%, transparent 74%);
  clip-path: polygon(22% 0, 100% 0, 100% 100%, 0 42%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), rgba(245, 185, 75, 0.6) 48%, transparent 86%);
  opacity: 0.5;
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 40px);
}

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

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.2vw, 52px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  max-width: 21ch;
}

.page-about .about-hero .lede {
  margin-top: clamp(16px, 2vw, 22px);
  max-width: 40ch;
  color: var(--mist);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
}

/* hero stats */
.page-about .hero-stats {
  list-style: none;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.page-about .hero-stats .stat {
  background: var(--ink-console);
  padding: clamp(16px, 2.4vw, 26px);
  border-left: 2px solid transparent;
  transition: border-color 0.25s ease, background-color 0.25s ease;
}

.page-about .hero-stats .stat:hover {
  border-left-color: var(--cyan);
  background: #131f3d;
}

.page-about .hero-stats .stat__num {
  display: block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1;
  color: var(--gold);
  letter-spacing: -0.01em;
}

.page-about .hero-stats .stat__label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ============ 通用区块 ============ */
.page-about .about-track,
.page-about .about-lines,
.page-about .about-studio,
.page-about .about-partners,
.page-about .about-record,
.page-about .about-next {
  padding-top: var(--about-section-space);
  padding-bottom: var(--about-section-space);
}

.page-about .section-title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 3.4vw, 36px);
  line-height: 1.24;
  letter-spacing: -0.015em;
  max-width: 22ch;
}

.page-about .lede {
  margin-top: clamp(14px, 1.8vw, 20px);
  max-width: 42ch;
  color: var(--mist);
  line-height: 1.8;
}

.page-about .about-studio__copy p,
.page-about .about-record__copy p,
.page-about .about-next__inner p {
  margin-top: 16px;
  line-height: 1.8;
  color: #D6DDF2;
  max-width: 42ch;
}

.page-about a {
  color: var(--cyan-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 224, 214, 0.32);
  transition: color 0.2s ease, border-color 0.2s ease;
}

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

.page-about .btn {
  border-bottom: 0;
}

/* ============ 时间线 ============ */
.page-about .tl {
  list-style: none;
  margin: clamp(36px, 5vw, 60px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  top: 6px;
  bottom: 6px;
  left: 11px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan), rgba(34, 224, 214, 0.18) 72%, transparent);
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 clamp(30px, 4vw, 46px) 44px;
}

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

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 6px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink-deep);
  border: 2px solid var(--cyan);
  box-shadow: var(--glow-cyan);
  transition: background-color 0.3s ease, border-color 0.3s ease;
}

.page-about .tl__item:last-child::before {
  border-color: var(--gold);
  box-shadow: 0 0 14px rgba(245, 185, 75, 0.7);
  background: var(--gold);
}

.page-about .tl__tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .tl__season {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(19px, 2.4vw, 25px);
  line-height: 1.2;
  color: var(--gold);
}

.page-about .tl__body {
  margin-top: 14px;
}

.page-about .tl__title {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(18px, 2.1vw, 22px);
  line-height: 1.35;
  color: var(--white);
}

.page-about .tl__body p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--mist);
  max-width: 40ch;
}

/* 时间线后的宽幅图 */
.page-about .about-shot {
  margin: clamp(40px, 6vw, 72px) 0 0;
}

/* ============ 四条线 ============ */
.page-about .lines {
  margin-top: clamp(32px, 5vw, 56px);
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .line {
  position: relative;
  overflow: hidden;
  background: var(--ink-console);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 2.6vw, 32px);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about .line::after {
  content: "";
  position: absolute;
  right: -34%;
  bottom: -58%;
  width: 210px;
  height: 210px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(34, 224, 214, 0.2), transparent 68%);
  opacity: 0;
  transition: opacity 0.35s ease;
  pointer-events: none;
}

.page-about .line:hover {
  border-color: rgba(34, 224, 214, 0.5);
}

.page-about .line:hover::after {
  opacity: 1;
}

.page-about .line__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.page-about .line__no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--mist);
}

.page-about .line__num {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(40px, 5vw, 54px);
  line-height: 1;
  color: var(--cyan);
}

.page-about .line__name {
  margin: 18px 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(19px, 2.2vw, 23px);
  line-height: 1.3;
  color: var(--white);
}

.page-about .line__desc {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.78;
  color: #CDD5EC;
}

.page-about .line__note {
  margin: 16px 0 0;
  padding: 12px 14px;
  border-left: 2px solid rgba(34, 224, 214, 0.42);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  background: rgba(34, 224, 214, 0.05);
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  transition: color 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
}

.page-about .line:hover .line__note,
.page-about .line:focus-within .line__note {
  color: var(--white);
  background: rgba(34, 224, 214, 0.11);
  border-left-color: var(--cyan);
}

.page-about .about-lines__foot {
  margin-top: clamp(24px, 3vw, 36px);
  font-size: 15px;
  color: var(--mist);
}

/* ============ 教研组 ============ */
.page-about .about-studio__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(28px, 4vw, 52px);
}

.page-about .about-studio__list {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-studio__list li {
  position: relative;
  padding-left: 22px;
  font-size: 15.5px;
  line-height: 1.7;
  color: #CDD5EC;
}

.page-about .about-studio__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 12px;
  height: 2px;
  background: var(--cyan);
  box-shadow: var(--glow-cyan);
}

.page-about .about-studio__list strong {
  font-family: var(--font-mono);
  font-weight: 700;
  color: var(--gold);
}

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

/* ============ 合作伙伴 ============ */
.page-about .partners {
  margin-top: clamp(30px, 4vw, 48px);
}

.page-about .partner {
  background: var(--ink-console);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 2.4vw, 30px);
  border-top: 2px solid rgba(34, 224, 214, 0.5);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.page-about .partner:hover {
  transform: translateY(-3px);
  border-color: rgba(34, 224, 214, 0.6);
}

.page-about .partner__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-about .partner__name {
  margin: 12px 0 10px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.35;
  color: var(--white);
}

.page-about .partner p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

.page-about .about-partners__foot {
  margin-top: clamp(24px, 3vw, 34px);
  font-size: 15px;
  color: var(--mist);
}

/* ============ 记录与徽章 ============ */
.page-about .about-record__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  margin-top: clamp(24px, 3.4vw, 38px);
}

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

.page-about .badge-wall {
  list-style: none;
  margin: clamp(34px, 5vw, 56px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: clamp(8px, 1.2vw, 14px);
}

.page-about .badge-wall__item {
  position: relative;
  display: grid;
  place-items: center;
  aspect-ratio: 1 / 1;
  transition: transform 0.25s ease;
}

.page-about .badge-wall__shape {
  position: absolute;
  inset: 8%;
  clip-path: polygon(50% 0%, 100% 25%, 100% 75%, 50% 100%, 0% 75%, 0% 25%);
  background: linear-gradient(150deg, rgba(34, 224, 214, 0.5), rgba(90, 62, 140, 0.75));
  opacity: 0.55;
  transition: opacity 0.25s ease, background 0.25s ease;
}

.page-about .badge-wall__no {
  position: relative;
  z-index: 1;
  font-family: var(--font-mono);
  font-size: clamp(10px, 1.1vw, 12px);
  letter-spacing: 0.06em;
  color: var(--white);
}

.page-about .badge-wall__item:hover,
.page-about .badge-wall__item:focus-within {
  transform: translateY(-3px);
}

.page-about .badge-wall__item:hover .badge-wall__shape,
.page-about .badge-wall__item:focus-within .badge-wall__shape {
  opacity: 1;
  background: linear-gradient(150deg, var(--gold), rgba(255, 77, 141, 0.72));
}

/* ============ 结尾 ============ */
.page-about .about-next__inner {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(90% 120% at 100% 0%, rgba(34, 224, 214, 0.13), transparent 62%),
    linear-gradient(140deg, var(--ink-console), rgba(16, 26, 51, 0.5));
  padding: clamp(26px, 4vw, 54px);
}

.page-about .about-next__inner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: clamp(90px, 16vw, 190px);
  height: 3px;
  background: linear-gradient(90deg, var(--cyan), var(--gold), var(--rose));
}

.page-about .about-next__actions {
  margin-top: clamp(22px, 3vw, 32px);
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.page-about .about-next__meta {
  margin: clamp(18px, 2.4vw, 26px) 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
  max-width: 52ch;
}

/* ============ 响应式 ============ */
@media (min-width: 560px) {
  .page-about .badge-wall {
    grid-template-columns: repeat(8, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .line:nth-child(1) {
    grid-column: span 4;
  }

  .page-about .line:nth-child(2) {
    grid-column: span 2;
  }

  .page-about .line:nth-child(3) {
    grid-column: span 2;
  }

  .page-about .line:nth-child(4) {
    grid-column: span 4;
  }

  .page-about .badge-wall {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 2fr);
    column-gap: clamp(24px, 4vw, 56px);
    align-items: end;
  }

  .page-about .about-hero__aside {
    display: flex;
    justify-content: flex-end;
    padding-bottom: 10px;
  }

  /* 时间线：轴线居中，赛季在左，内容在右 */
  .page-about .tl::before {
    left: 50%;
    margin-left: -1px;
  }

  .page-about .tl__item {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    column-gap: clamp(44px, 6vw, 84px);
    padding-left: 0;
  }

  .page-about .tl__item::before {
    left: 50%;
    margin-left: -8px;
    top: 8px;
  }

  .page-about .tl__meta {
    grid-column: 1;
    text-align: right;
    padding-right: 6px;
  }

  .page-about .tl__body {
    grid-column: 2;
    margin-top: 0;
  }

  .page-about .about-studio__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-about .about-record__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
  }
}

@media (min-width: 1100px) {
  .page-about .badge-wall {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .line,
  .page-about .line::after,
  .page-about .line__note,
  .page-about .partner,
  .page-about .badge-wall__item,
  .page-about .badge-wall__shape,
  .page-about .hero-stats .stat,
  .page-about a {
    transition: none;
  }

  .page-about .line:hover,
  .page-about .partner:hover,
  .page-about .badge-wall__item:hover {
    transform: none;
  }
}