.page-about {
  --about-rule: rgba(19, 74, 123, .55);
  --about-text: rgba(243, 233, 210, .86);
  --about-text-soft: rgba(243, 233, 210, .74);
}

.page-about .breadcrumbs {
  padding-top: 20px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  border-bottom: 2px solid var(--line);
  background:
    radial-gradient(120% 140% at 88% 0%, rgba(0, 229, 208, .11), transparent 55%),
    radial-gradient(80% 120% at 0% 100%, rgba(255, 90, 54, .08), transparent 60%),
    linear-gradient(180deg, var(--panel-2), var(--sea));
  padding: clamp(26px, 5vw, 60px) 0 clamp(24px, 4vw, 48px);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-size: clamp(32px, 6vw, 72px);
  font-weight: 300;
  line-height: 1.06;
  letter-spacing: -.01em;
  color: var(--white);
}

.page-about .about-hero__text {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.8;
  color: var(--about-text);
}

.page-about .about-hero__clock {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 20px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--mist);
}

.page-about .about-hero__clock .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 208, .16);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--line);
  border: 2px solid var(--line);
  box-shadow: var(--shadow);
}

.page-about .about-stat {
  background: var(--panel);
  padding: clamp(14px, 2vw, 20px);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.1;
  color: var(--cyan);
}

.page-about .about-stat:nth-child(2) .about-stat__num { color: var(--orange); }
.page-about .about-stat:nth-child(3) .about-stat__num { color: var(--white); }
.page-about .about-stat:nth-child(4) .about-stat__num { color: var(--amber); }

.page-about .about-stat__label {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--mist);
}

/* ---------- 阅读主体骨架 ---------- */
.page-about .about-layout {
  padding: clamp(30px, 4.5vw, 56px) 0 clamp(40px, 6vw, 80px);
}

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

.page-about .about-flow {
  position: relative;
  min-width: 0;
}

/* ---------- 章节 ---------- */
.page-about .about-chapter {
  padding: clamp(24px, 3.6vw, 42px) 0;
  border-bottom: 1px solid var(--about-rule);
}

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

.page-about .chapter-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
}

.page-about .chapter-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .32em;
  color: var(--cyan);
}

.page-about .about-chapter h2 {
  margin: 0;
  font-size: clamp(24px, 3.4vw, 42px);
  font-weight: 300;
  line-height: 1.15;
  color: var(--white);
}

.page-about .about-chapter p {
  margin: 14px 0 0;
  max-width: 66ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--about-text);
}

.page-about .about-chapter a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-chapter a:hover {
  color: var(--amber);
}

/* ---------- 图文双列 ---------- */
.page-about .about-split {
  display: grid;
  gap: var(--gap);
  margin-top: 6px;
}

.page-about .about-split--reverse {
  margin-top: 0;
}

.page-about .figure {
  margin: 18px 0 0;
}

.page-about .figure__media {
  border: 2px solid var(--line);
  box-shadow: var(--shadow-soft);
  background: linear-gradient(135deg, var(--panel), var(--sea));
  overflow: hidden;
}

.page-about .figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about .about-media--origin { aspect-ratio: 3 / 2; }
.page-about .about-media--wide { aspect-ratio: 2 / 1; }
.page-about .about-media--square { aspect-ratio: 1 / 1; }

.page-about .figure__caption {
  margin-top: 10px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--mist);
}

/* ---------- 团队分工 ---------- */
.page-about .crew-grid {
  display: grid;
  gap: var(--gap);
  margin-top: 26px;
}

.page-about .crew-card {
  border: 2px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow-soft);
  padding: clamp(18px, 2.4vw, 24px);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

.page-about .crew-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--cyan);
}

.page-about .crew-card__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(30px, 3.6vw, 44px);
  line-height: 1;
  color: var(--orange);
}

.page-about .crew-card__role {
  margin: 10px 0 0;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: .06em;
  color: var(--white);
}

.page-about .crew-card__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-about .crew-card__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-text-soft);
}

.page-about .crew-card__list li + li {
  margin-top: 4px;
}

.page-about .crew-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 7px;
  height: 2px;
  background: var(--cyan);
}

/* ---------- 奶油信息岛 ---------- */
.page-about .about-cream {
  margin-top: 26px;
  padding: clamp(18px, 3vw, 26px);
  background: var(--cream);
  color: var(--ink);
  border: 2px solid var(--ink);
  box-shadow: var(--shadow);
}

.page-about .about-cream p {
  margin: 0;
  max-width: 74ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-cream strong {
  color: var(--panel);
}

/* ---------- 赛后节奏 ---------- */
.page-about .cadence {
  display: grid;
  gap: 2px;
  margin-top: 26px;
}

.page-about .cadence-step {
  border-left: 3px solid var(--cyan);
  background: var(--panel-2);
  padding: 16px 18px;
}

.page-about .cadence-step:nth-child(2) { border-left-color: var(--amber); }
.page-about .cadence-step:nth-child(3) { border-left-color: var(--orange); }

.page-about .cadence-step__time {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .cadence-step:nth-child(2) .cadence-step__time { color: var(--amber); }
.page-about .cadence-step:nth-child(3) .cadence-step__time { color: var(--orange); }

.page-about .cadence-step h3 {
  margin: 8px 0 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--white);
}

.page-about .cadence-step p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-text-soft);
}

/* ---------- 时间线 ---------- */
.page-about .tl {
  list-style: none;
  margin: 28px 0 0;
  padding: 0 0 0 2px;
}

.page-about .tl__item {
  position: relative;
  padding: 0 0 26px 26px;
  border-left: 2px solid var(--line);
}

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

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: -7px;
  top: 5px;
  width: 12px;
  height: 12px;
  background: var(--panel);
  border: 2px solid var(--cyan);
}

.page-about .tl__item--now::before {
  background: var(--orange);
  border-color: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 90, 54, .18);
}

.page-about .tl__year {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--amber);
}

.page-about .tl__item h3 {
  margin: 6px 0 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--white);
}

.page-about .tl__item p {
  margin: 8px 0 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--about-text-soft);
}

/* ---------- 底部行动 ---------- */
.page-about .about-cta {
  margin-top: clamp(32px, 5vw, 56px);
  display: grid;
  gap: 20px;
  padding: clamp(22px, 3.5vw, 40px);
  border: 2px solid var(--cyan);
  background: linear-gradient(135deg, var(--panel), var(--panel-2));
  box-shadow: var(--shadow);
}

.page-about .about-cta h2 {
  margin: 0;
  font-size: clamp(22px, 2.8vw, 34px);
  font-weight: 300;
  line-height: 1.2;
  color: var(--white);
}

.page-about .about-cta p {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--about-text-soft);
}

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

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

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

@media (min-width: 880px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .9fr);
    align-items: center;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: center;
    gap: clamp(24px, 3.5vw, 44px);
  }

  .page-about .about-split--reverse {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
  }

  .page-about .about-split .figure {
    margin-top: 0;
  }

  .page-about .about-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: clamp(20px, 3vw, 40px);
  }
}

@media (min-width: 1040px) {
  .page-about .about-layout {
    display: grid;
    grid-template-columns: 190px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
  }

  .page-about .about-toc {
    display: block;
    position: sticky;
    top: 104px;
    align-self: start;
  }

  .page-about .about-toc__title {
    margin: 0 0 14px;
    font-size: 12px;
    letter-spacing: .3em;
    color: var(--mist);
  }

  .page-about .toc {
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .page-about .toc__link {
    display: flex;
    align-items: baseline;
    gap: 10px;
    padding: 9px 0 9px 12px;
    border-left: 2px solid var(--line);
    font-size: 14px;
    color: var(--mist);
    text-decoration: none;
    transition: color .25s ease, border-color .25s ease;
  }

  .page-about .toc__link:hover,
  .page-about .toc__link.is-active {
    color: var(--cyan);
    border-left-color: var(--cyan);
  }

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

  .page-about .toc__link:hover .toc__no,
  .page-about .toc__link.is-active .toc__no {
    color: var(--amber);
  }

  .page-about .about-flow::before {
    content: "";
    position: absolute;
    left: -28px;
    top: 10px;
    bottom: 10px;
    width: 1px;
    background: linear-gradient(180deg, var(--cyan), var(--line) 45%, transparent);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .crew-card,
  .page-about .toc__link {
    transition: none;
  }

  .page-about .crew-card:hover {
    transform: none;
  }
}