.page-about {
  color: var(--warm);
  padding-bottom: clamp(40px, 8vw, 96px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(14px, 3vw, 28px) 0 clamp(38px, 7vw, 88px);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -20% -8% auto;
  height: 78%;
  background:
    radial-gradient(58% 62% at 76% 0%, rgba(111, 247, 226, .16), transparent 68%),
    radial-gradient(42% 52% at 6% 14%, rgba(255, 122, 47, .10), transparent 70%);
  pointer-events: none;
}

.page-about .about-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 4vw, 40px);
}

.page-about .about-hero__index,
.page-about .about-section__num {
  font-family: var(--ff-display);
  font-weight: 200;
  line-height: .8;
  letter-spacing: -.02em;
  color: transparent;
  -webkit-text-stroke: 1.4px rgba(111, 247, 226, .46);
}

.page-about .about-hero__index {
  font-size: clamp(76px, 17vw, 148px);
}

.page-about .about-hero__title {
  margin: 12px 0 0;
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: clamp(34px, 8vw, 72px);
  line-height: 1.02;
  letter-spacing: -.012em;
  color: var(--warm);
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin: 20px 0 0;
  max-width: 34em;
  font-size: clamp(16px, 2.1vw, 18px);
  line-height: 1.8;
  color: var(--ash);
}

.page-about .about-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin-top: 26px;
}

.page-about .about-hero__meta span {
  font-family: var(--ff-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--cyan);
  border: 1px solid var(--line-cyan);
  border-radius: 999px;
  padding: 5px 12px;
}

.page-about .about-hero__media {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel-deep);
}

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

/* ---------- 章节骨架 ---------- */
.page-about .about-section {
  padding: clamp(30px, 5.5vw, 68px) 0;
  border-top: 1px solid var(--line);
}

.page-about .about-section__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 34px);
}

.page-about .about-section__num {
  display: block;
  font-size: clamp(48px, 10vw, 72px);
}

.page-about .about-section__title {
  margin: 10px 0 0;
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: clamp(26px, 4vw, 40px);
  line-height: 1.08;
  color: var(--warm);
  text-wrap: balance;
}

.page-about .about-section__body {
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--ash);
}

.page-about .about-section__body > p {
  margin: 0;
  max-width: 42em;
}

.page-about .about-section__body > p + p {
  margin-top: 16px;
}

.page-about .about-quote {
  margin: 26px 0 0;
  padding: 18px 20px;
  border-radius: var(--r-md);
  border: 1px solid var(--line-cyan);
  background: var(--glass);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
  color: var(--warm);
  font-size: 15.5px;
  line-height: 1.8;
}

.page-about .about-quote .mono {
  font-family: var(--ff-mono);
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--cyan);
}

/* ---------- 三条内容线 ---------- */
.page-about .about-lines {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 26px;
}

.page-about .about-line {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px 20px 24px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  border-top: 3px solid var(--line-strong);
  background: var(--panel);
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-line--nav { border-top-color: var(--cyan); }
.page-about .about-line--squad { border-top-color: var(--orange); }
.page-about .about-line--log { border-top-color: var(--clay); }

.page-about .about-line:hover {
  border-color: var(--line-cyan);
}

.page-about .about-line__tag {
  font-family: var(--ff-mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--mist);
}

.page-about .about-line__title {
  margin: 0;
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: clamp(22px, 3vw, 28px);
  line-height: 1.12;
  color: var(--warm);
}

.page-about .about-line__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ash);
}

.page-about .about-line__list {
  margin: auto 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
  font-family: var(--ff-mono);
  font-size: 12.5px;
  color: var(--mist);
}

.page-about .about-line__list li {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  padding-top: 8px;
  border-top: 1px dashed var(--line);
}

.page-about .about-line__list b {
  font-weight: 500;
  color: var(--warm);
}

/* ---------- 赛季节奏（密集索引层） ---------- */
.page-about .about-rhythm {
  margin-top: 26px;
  padding: clamp(20px, 3.4vw, 34px);
  border-radius: var(--r-lg);
  background: var(--ash);
  color: var(--ink);
}

.page-about .about-rhythm__list {
  margin: 0;
  padding: 0;
  display: grid;
}

.page-about .about-rhythm__item {
  display: grid;
  gap: 4px;
  padding: 16px 0;
  border-bottom: 1px solid rgba(7, 26, 21, .14);
}

.page-about .about-rhythm__item:first-child { padding-top: 0; }
.page-about .about-rhythm__item:last-child { border-bottom: 0; padding-bottom: 0; }

.page-about .about-rhythm__term {
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.2;
  color: var(--ink);
}

.page-about .about-rhythm__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(7, 26, 21, .78);
}

.page-about .about-rhythm__note {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(7, 26, 21, .14);
  font-family: var(--ff-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: rgba(7, 26, 21, .66);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(18px, 3vw, 30px);
  margin-top: 26px;
}

.page-about .about-team__list {
  display: grid;
  border-top: 1px solid var(--line-strong);
}

.page-about .about-team__item {
  border-bottom: 1px solid var(--line-strong);
}

.page-about .about-team__summary {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 16px 2px;
  cursor: pointer;
  list-style: none;
  color: var(--warm);
}

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

.page-about .about-team__summary h3 {
  margin: 0;
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.15;
  color: var(--warm);
}

.page-about .about-team__count {
  font-family: var(--ff-mono);
  font-size: 11.5px;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-about .about-team__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--ff-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--orange);
  transition: transform var(--dur) var(--ease);
}

.page-about .about-team__item[open] .about-team__summary::after {
  content: "−";
}

.page-about .about-team__summary:hover { color: var(--cyan); }
.page-about .about-team__summary:hover h3 { color: var(--cyan); }

.page-about .about-team__body {
  padding: 0 2px 20px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ash);
}

.page-about .about-team__body p { margin: 0; }

.page-about .about-team__body ul {
  margin: 12px 0 0;
  padding-left: 18px;
  display: grid;
  gap: 6px;
  color: var(--mist);
  font-size: 14.5px;
  line-height: 1.7;
}

.page-about .about-team__media {
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel-deep);
}

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

/* ---------- 里程碑 ---------- */
.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 26px;
  padding: 0;
  list-style: none;
}

.page-about .about-jump a {
  display: inline-block;
  padding: 6px 13px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  font-family: var(--ff-mono);
  font-size: 12.5px;
  letter-spacing: .08em;
  color: var(--mist);
  text-decoration: none;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

.page-about .about-mile {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3.4vw, 34px);
  align-items: start;
}

.page-about .about-timeline {
  margin: 0;
  padding: 0 0 0 22px;
  list-style: none;
  border-left: 1px solid var(--line-strong);
}

.page-about .about-timeline__item {
  position: relative;
  padding-bottom: 26px;
  scroll-margin-top: 96px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -27px;
  top: 7px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(111, 247, 226, .12);
}

.page-about .about-timeline__item:last-child::before {
  background: var(--orange);
  box-shadow: 0 0 0 4px rgba(255, 122, 47, .16);
}

.page-about .about-timeline__year {
  font-family: var(--ff-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-about .about-timeline__item h3 {
  margin: 6px 0 6px;
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.15;
  color: var(--warm);
}

.page-about .about-timeline__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ash);
}

.page-about .about-mile__media {
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--panel-deep);
}

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

/* ---------- 协作生态 ---------- */
.page-about .about-eco {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-eco__stat {
  padding: 18px 16px;
  border-radius: var(--r-md);
  border: 1px solid var(--line);
  background: var(--panel);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-about .about-eco__stat:hover {
  border-color: var(--line-cyan);
  background: var(--panel-deep);
}

.page-about .about-eco__num {
  display: block;
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: clamp(34px, 6vw, 48px);
  line-height: 1;
  color: var(--orange);
}

.page-about .about-eco__label {
  display: block;
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .about-section__body > p + .about-eco + p {
  margin-top: 22px;
}

/* ---------- 收束 ---------- */
.page-about .about-cta {
  margin-top: clamp(30px, 6vw, 60px);
  padding: clamp(24px, 4vw, 44px);
  border-radius: var(--r-lg);
  border: 1px solid var(--line-cyan);
  background: var(--glass);
  -webkit-backdrop-filter: var(--glass-blur);
  backdrop-filter: var(--glass-blur);
}

.page-about .about-cta h2 {
  margin: 0;
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: clamp(26px, 4.4vw, 40px);
  line-height: 1.1;
  color: var(--warm);
}

.page-about .about-cta p {
  margin: 14px 0 0;
  max-width: 46em;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ash);
}

.page-about .about-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

/* ---------- 中等屏 ---------- */
@media (min-width: 720px) {
  .page-about .about-rhythm__item {
    grid-template-columns: 190px minmax(0, 1fr);
    align-items: baseline;
    gap: 18px;
  }

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

/* ---------- 桌面 ---------- */
@media (min-width: 940px) {
  .page-about .about-hero__grid {
    grid-template-columns: 132px minmax(0, 1fr) minmax(0, 340px);
    align-items: start;
    gap: clamp(24px, 3vw, 44px);
  }

  .page-about .about-section__grid {
    grid-template-columns: 220px minmax(0, 1fr);
    gap: clamp(24px, 3.4vw, 48px);
  }

  .page-about .about-section__head {
    position: sticky;
    top: 24px;
    align-self: start;
  }

  .page-about .about-lines {
    grid-template-columns: 1.28fr 1fr 1fr;
    align-items: stretch;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 1fr) minmax(0, 380px);
    align-items: start;
  }

  .page-about .about-mile {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  }

  .page-about .about-mile__media {
    position: sticky;
    top: 24px;
  }
}

@media (min-width: 1240px) {
  .page-about .about-hero__index {
    font-size: 168px;
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-about .about-line,
  .page-about .about-eco__stat,
  .page-about .about-jump a,
  .page-about .about-team__summary::after {
    transition: none;
  }
}