.page-about {
  --about-rail: 26px;
  --about-rail-line: 5px;
  --about-rail-offset: 8px;
  --about-dot: -24px;
  background: var(--paper);
}

.page-about [hidden] {
  display: none !important;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + 24px) 0 0;
  background: linear-gradient(158deg, var(--paper) 0 55%, rgba(215, 25, 45, .08) 55% 100%);
}

.page-about .about-hero__grid {
  position: relative;
  z-index: 2;
  display: grid;
  gap: 28px;
}

.page-about .about-hero__grid > * {
  min-width: 0;
}

.page-about .about-breadcrumb {
  margin-bottom: 16px;
}

.page-about .about-hero h1 {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(30px, 7.2vw, 60px);
  line-height: 1.06;
  letter-spacing: .01em;
  color: var(--navy);
}

.page-about .about-hero__mark {
  color: var(--red);
  white-space: nowrap;
}

.page-about .about-hero__lead {
  margin: 20px 0 0;
  max-width: 48ch;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--navy);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

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

.page-about .about-hero__media {
  border-radius: 2px 26px 2px 26px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transform: rotate(-1.2deg);
}

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

.page-about .about-hero__rail {
  position: relative;
  z-index: 2;
  margin-top: 40px;
  background: var(--navy);
  border-radius: 2px 22px 0 0;
}

.page-about .about-rail {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  padding: 22px 0 26px;
}

.page-about .about-rail__item {
  min-width: 0;
  padding-left: 12px;
  border-left: 3px solid var(--red);
}

.page-about .about-rail__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(20px, 5.2vw, 34px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .about-rail__label {
  display: block;
  margin-top: 7px;
  font-size: 12px;
  line-height: 1.5;
  color: rgba(255, 255, 255, .68);
}

/* ---------- 时间线骨架 ---------- */
.page-about .about-timeline {
  padding: 30px 0 24px;
  background: var(--paper);
}

.page-about .about-timeline__inner {
  position: relative;
  padding-left: var(--about-rail);
}

.page-about .about-timeline__inner::before {
  content: "";
  position: absolute;
  left: var(--about-rail-offset);
  top: 18px;
  bottom: 18px;
  width: var(--about-rail-line);
  border-radius: 4px;
  background: repeating-linear-gradient(
    180deg,
    var(--red) 0 14px,
    rgba(215, 25, 45, .18) 14px 28px
  );
}

.page-about .about-chapter {
  position: relative;
  padding: 34px 0;
}

.page-about .about-chapter::before {
  content: "";
  position: absolute;
  left: var(--about-dot);
  top: 40px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--green);
  border: 3px solid var(--paper);
  box-sizing: content-box;
}

.page-about .about-chapter__head {
  max-width: 62ch;
  margin-bottom: 22px;
}

.page-about .about-chapter h2 {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 5.4vw, 36px);
  line-height: 1.14;
  letter-spacing: .01em;
  color: var(--navy);
}

.page-about .about-chapter p {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--navy);
}

.page-about .about-chapter__head > p {
  margin: 12px 0 0;
  opacity: .82;
}

/* ---------- 01 缘起 ---------- */
.page-about .about-origin {
  display: grid;
  gap: 24px;
}

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

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

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

.page-about .about-note {
  background: var(--white);
  border-left: 5px solid var(--red);
  border-radius: var(--cut);
  padding: 16px 18px;
  box-shadow: 0 8px 20px rgba(6, 16, 31, .07);
}

.page-about .about-note__k {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: .2em;
  color: var(--red);
}

.page-about .about-note p {
  margin: 6px 0 0;
  font-size: 14.5px;
  line-height: 1.7;
  opacity: .84;
}

/* ---------- 02 内容线 ---------- */
.page-about .about-lines {
  display: grid;
  gap: 24px;
}

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

.page-about .about-lines__media {
  border-radius: 2px 22px 2px 22px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

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

.page-about .about-lines__cards {
  display: grid;
  gap: 14px;
}

.page-about .about-line {
  background: var(--white);
  border-top: 4px solid var(--red);
  border-radius: 2px 16px 2px 16px;
  padding: 18px 18px 20px;
  box-shadow: 0 10px 24px rgba(6, 16, 31, .08);
}

.page-about .about-line h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: .02em;
  color: var(--navy);
}

.page-about .about-line p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  opacity: .8;
}

/* ---------- 03 数据方法 ---------- */
.page-about .about-data {
  background: var(--navy);
  border-radius: 2px 22px 2px 22px;
  padding: 26px 20px;
  box-shadow: var(--shadow-card);
}

.page-about .about-data__stats {
  display: grid;
  gap: 12px;
  margin-bottom: 22px;
}

.page-about .about-stat {
  display: flex;
  align-items: baseline;
  gap: 12px;
  background: var(--ink);
  border-left: 4px solid var(--green);
  border-radius: 2px 12px 2px 12px;
  padding: 14px 16px;
}

.page-about .about-stat__num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 7vw, 38px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -.03em;
  color: var(--white);
}

.page-about .about-stat__label {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(255, 255, 255, .74);
}

.page-about .about-data__text p {
  margin: 0;
  color: rgba(255, 255, 255, .84);
  font-size: 15.5px;
  line-height: 1.85;
}

.page-about .about-data__text p + p {
  margin-top: 14px;
}

.page-about .about-data__text .btn {
  margin-top: 22px;
}

.page-about .about-data__figure {
  margin: 24px 0 0;
}

.page-about .about-data__media {
  border-radius: 2px 22px 2px 22px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

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

/* ---------- 04 赛季节奏 ---------- */
.page-about .about-season {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  counter-reset: season;
}

.page-about .about-season__item {
  background: var(--white);
  border-top: 3px solid var(--red);
  border-radius: 2px 14px 2px 14px;
  padding: 20px 18px;
  box-shadow: 0 8px 20px rgba(6, 16, 31, .07);
}

.page-about .about-season__stage {
  margin: 0;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 16px;
  letter-spacing: .14em;
  color: var(--red);
}

.page-about .about-season__item p {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  opacity: .82;
}

/* ---------- 05 团队 ---------- */
.page-about .about-team {
  display: grid;
  gap: 24px;
}

.page-about .about-team__badge {
  background: var(--navy);
  border-radius: 2px 22px 2px 22px;
  padding: 24px;
  box-shadow: var(--shadow-card);
}

.page-about .about-team__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(54px, 15vw, 84px);
  font-weight: 600;
  line-height: .9;
  letter-spacing: -.04em;
  color: var(--white);
}

.page-about .about-team__unit {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  letter-spacing: .22em;
  color: var(--green);
}

.page-about .about-team__desc {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 255, 255, .76);
}

.page-about .about-team__roles {
  display: grid;
  gap: 14px;
}

.page-about .about-role {
  background: var(--white);
  border-left: 4px solid var(--red);
  border-radius: 2px 14px 2px 14px;
  padding: 18px;
  box-shadow: 0 8px 20px rgba(6, 16, 31, .07);
}

.page-about .about-role h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  letter-spacing: .02em;
  color: var(--navy);
}

.page-about .about-role p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  opacity: .8;
}

/* ---------- 06 场景 ---------- */
.page-about .about-filters {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 22px;
}

.page-about .about-scenes {
  display: grid;
  gap: 16px;
}

.page-about .about-scene {
  background: var(--white);
  border-top: 4px solid var(--navy);
  border-radius: 2px 16px 2px 16px;
  padding: 20px;
  box-shadow: 0 10px 24px rgba(6, 16, 31, .08);
}

.page-about .about-scene h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17.5px;
  line-height: 1.35;
  color: var(--navy);
}

.page-about .about-scene p {
  margin: 9px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  opacity: .8;
}

/* ---------- 07 联系 ---------- */
.page-about .about-contact {
  display: grid;
  gap: 22px;
}

.page-about .about-contact__copy p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.85;
  opacity: .84;
}

.page-about .about-contact__copy p + p {
  margin-top: 14px;
}

.page-about .about-contact__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-about .about-contact__panel {
  background: var(--white);
  border-top: 5px solid var(--red);
  border-radius: 2px 22px 2px 22px;
  padding: 24px 22px;
  box-shadow: var(--shadow-card);
}

.page-about .about-contact__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-contact__key {
  display: block;
  font-family: var(--font-serif);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--gray);
}

.page-about .about-contact__val {
  display: block;
  margin-top: 5px;
  font-size: 15.5px;
  line-height: 1.6;
  color: var(--navy);
  overflow-wrap: anywhere;
}

/* ---------- 桌面扩展 ---------- */
@media (min-width: 620px) {
  .page-about .about-lines__cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-about {
    --about-rail: 64px;
    --about-dot: -47px;
  }

  .page-about .about-timeline__inner::before {
    left: 22px;
    width: 8px;
  }

  .page-about .about-hero {
    padding-top: calc(var(--header-h) + 44px);
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: center;
    gap: 48px;
  }

  .page-about .about-rail {
    gap: 24px;
    padding: 26px 0 30px;
  }

  .page-about .about-chapter {
    padding: 46px 0;
  }

  .page-about .about-chapter::before {
    top: 54px;
  }

  .page-about .about-origin {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .about-lines {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 32px;
    align-items: start;
  }

  .page-about .about-data {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 32px;
    align-items: center;
    padding: 36px 32px;
  }

  .page-about .about-data__stats {
    margin-bottom: 0;
  }

  .page-about .about-data__text .btn {
    margin-top: 26px;
  }

  .page-about .about-team {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 36px;
    align-items: start;
  }

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

  .page-about .about-contact {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: 36px;
    align-items: start;
  }
}

@media (min-width: 1060px) {
  .page-about .about-season {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
  }

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