.page-about {
  --about-gap: 28px;
  --about-num-size: clamp(52px, 9vw, 112px);
  --about-glass: rgba(10, 18, 38, 0.62);
  --about-card: rgba(18, 32, 60, 0.72);
  --about-cyan-soft: rgba(47, 227, 208, 0.16);
  --about-orange-soft: rgba(255, 106, 43, 0.14);
}

/* ---------- 面包屑与首屏 ---------- */

.page-about .breadcrumbs {
  padding-top: 24px;
}

.page-about .about-hero {
  padding-top: 20px;
  padding-bottom: 8px;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 200;
  font-size: clamp(40px, 10vw, 86px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  color: var(--paper-50);
  max-width: 14ch;
}

.page-about .about-hero__lead {
  margin: 22px 0 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(243, 237, 226, 0.76);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .about-hero__side {
  display: grid;
  gap: 12px;
  align-content: start;
}

.page-about .about-badge {
  padding: 18px 20px;
  border-radius: 4px;
  border: 1px solid var(--line-soft);
  background: var(--about-glass);
  position: relative;
  overflow: hidden;
}

.page-about .about-badge::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan-400), rgba(47, 227, 208, 0));
}

.page-about .about-badge__k {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--slate-400);
}

.page-about .about-badge__v {
  margin: 6px 0 0;
  font-size: clamp(26px, 5vw, 34px);
  font-weight: 600;
  line-height: 1.1;
  color: var(--cyan-400);
}

.page-about .about-badge__t {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(243, 237, 226, 0.66);
}

/* ---------- 章节快速索引 ---------- */

.page-about .about-quick {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 18px;
  padding: 20px 0 4px;
}

.page-about .about-quick__label {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--slate-400);
}

.page-about .about-quick__link {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  font-size: 13px;
  color: rgba(243, 237, 226, 0.72);
  text-decoration: none;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color 220ms var(--ease), border-color 220ms var(--ease);
}

.page-about .about-quick__link .mono {
  font-size: 11px;
  color: var(--slate-400);
}

.page-about .about-quick__link:hover,
.page-about .about-quick__link:focus-visible {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-400);
}

/* ---------- 通用章节结构 ---------- */

.page-about .about-sec {
  padding-top: 64px;
  padding-bottom: 8px;
}

.page-about .about-sec__head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  margin-bottom: 32px;
}

.page-about .about-sec__num {
  margin: 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: var(--about-num-size);
  line-height: 0.82;
  letter-spacing: -0.05em;
  color: rgba(243, 237, 226, 0.13);
  user-select: none;
}

.page-about .about-sec__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(27px, 5.2vw, 48px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--paper-50);
  max-width: 20ch;
}

.page-about .about-sec__lead {
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: 15px;
  line-height: 1.85;
  color: rgba(243, 237, 226, 0.72);
}

/* ---------- 01 平台定位 ---------- */

.page-about .about-figure {
  margin: 0 0 40px;
}

.page-about .about-figure .image-frame__caption {
  color: var(--slate-400);
}

.page-about .about-what__grid {
  align-items: start;
}

.page-about .about-what__body p {
  margin-top: 0;
}

.page-about .about-what__body p + p {
  margin-top: 18px;
}

.page-about .about-what__aside {
  display: grid;
  gap: 12px;
}

.page-about .about-way {
  padding: 20px;
  border-radius: 4px;
  background: var(--about-card);
  border: 1px solid var(--line-soft);
  position: relative;
  transition: border-color 240ms var(--ease), transform 240ms var(--ease);
}

.page-about .about-way::after {
  content: "";
  position: absolute;
  right: 20px;
  top: 20px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--violet-500);
  opacity: 0.7;
}

.page-about .about-way:hover {
  border-color: rgba(47, 227, 208, 0.45);
  transform: translateY(-2px);
}

.page-about .about-way .card__head {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan-400);
}

.page-about .about-way .card__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 0.01em;
  color: var(--paper-50);
}

.page-about .about-way .card__body {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(243, 237, 226, 0.68);
}

/* ---------- 02 赛季刻度带 ---------- */

.page-about .about-sec--timeline .about-sec__lead {
  max-width: 52ch;
}

.page-about .about-rail {
  margin: 0 -20px;
  padding: 0 20px;
}

.page-about .about-rail__hint {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--slate-400);
}

.page-about .about-rail__viewport {
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 14px;
  scrollbar-color: rgba(243, 237, 226, 0.22) transparent;
}

.page-about .about-rail__viewport:focus-visible {
  outline: 1px solid var(--cyan-400);
  outline-offset: 4px;
}

.page-about .about-rail__track {
  display: flex;
  gap: 16px;
  margin: 0;
  padding: 2px 2px 6px;
  list-style: none;
  width: max-content;
}

.page-about .about-node {
  flex: 0 0 76vw;
  max-width: 340px;
  scroll-snap-align: start;
  padding: 4px 20px 22px;
  border-radius: 4px;
  background: linear-gradient(180deg, rgba(18, 32, 60, 0.86), rgba(5, 10, 22, 0.4));
  border: 1px solid var(--line-soft);
  transition: border-color 260ms var(--ease);
}

.page-about .about-node:hover {
  border-color: rgba(47, 227, 208, 0.4);
}

.page-about .about-node__axis {
  display: block;
  width: 100%;
  height: 20px;
  margin: 8px 0 14px;
}

.page-about .about-node__era {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--orange-500);
}

.page-about .about-node__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  line-height: 1.25;
  color: var(--paper-50);
}

.page-about .about-node__text {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(243, 237, 226, 0.68);
}

/* ---------- 03 团队分工 ---------- */

.page-about .about-team__grid {
  align-items: start;
}

.page-about .about-quads {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  overflow: hidden;
}

.page-about .about-quad {
  background: var(--ink-850);
  padding: 24px 22px;
  position: relative;
  transition: background 240ms var(--ease);
}

.page-about .about-quad::before {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 2px;
  background: var(--cyan-400);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 320ms var(--ease);
}

.page-about .about-quad:hover {
  background: var(--ink-700);
}

.page-about .about-quad:hover::before {
  transform: scaleX(1);
}

.page-about .about-quad__icon {
  margin: 0;
  color: var(--cyan-400);
  line-height: 0;
}

.page-about .about-quad__n {
  margin: 14px 0 0;
  font-size: clamp(30px, 6vw, 40px);
  font-weight: 600;
  line-height: 1;
  color: var(--paper-50);
}

.page-about .about-quad__title {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 18px;
  letter-spacing: 0.02em;
  color: var(--orange-500);
}

.page-about .about-quad__text {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: rgba(243, 237, 226, 0.68);
}

.page-about .about-team__side {
  display: grid;
  gap: 16px;
  margin-top: 20px;
}

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

.page-about .about-team__note {
  padding: 20px;
  border-radius: 4px;
  border: 1px solid var(--line-soft);
  background: var(--about-glass);
}

.page-about .about-team__note .panel__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--slate-400);
}

.page-about .about-team__noteText {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(243, 237, 226, 0.72);
}

/* ---------- 04 条目上线 ---------- */

.page-about .about-flow__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-flow__list .list-index__item {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .about-flow__list .list-index__num {
  font-size: 18px;
  font-weight: 600;
  color: var(--cyan-400);
  line-height: 1.6;
}

.page-about .about-flow__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 0.01em;
  color: var(--paper-50);
}

.page-about .list-index__text p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.82;
  color: rgba(243, 237, 226, 0.7);
}

.page-about .about-flow__aside {
  margin-top: 24px;
}

.page-about .about-flow__panel {
  padding: 24px 22px;
  border-radius: 4px;
}

.page-about .about-flow__panel .panel__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(5, 10, 22, 0.5);
}

.page-about .about-flow__panel .panel__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 22px;
  color: var(--ink-950);
}

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

.page-about .about-flow__row {
  padding: 14px 0;
  border-top: 1px solid rgba(5, 10, 22, 0.14);
}

.page-about .about-flow__row dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--orange-500);
}

.page-about .about-flow__row dd {
  margin: 6px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(5, 10, 22, 0.75);
}

.page-about .about-flow__link {
  margin-top: 18px;
}

/* ---------- 05 覆盖规模 ---------- */

.page-about .about-scale__grid {
  align-items: start;
}

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

.page-about .about-scale__body {
  margin-top: 24px;
}

.page-about .about-scale__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .about-figure-stat {
  padding: 18px 16px;
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  background: rgba(18, 32, 60, 0.5);
  position: relative;
}

.page-about .about-figure-stat::before,
.page-about .about-figure-stat::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  border-color: var(--cyan-400);
  border-style: solid;
  opacity: 0.55;
}

.page-about .about-figure-stat::before {
  top: -1px;
  left: -1px;
  border-width: 1px 0 0 1px;
}

.page-about .about-figure-stat::after {
  bottom: -1px;
  right: -1px;
  border-width: 0 1px 1px 0;
}

.page-about .about-figure-stat__n {
  margin: 0;
  font-size: clamp(24px, 5vw, 32px);
  font-weight: 600;
  line-height: 1.05;
  color: var(--orange-500);
}

.page-about .about-figure-stat__l {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(243, 237, 226, 0.66);
}

.page-about .about-scale__lists {
  margin-top: 26px;
  display: grid;
  gap: 20px;
}

.page-about .about-scale__h {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: 0.04em;
  color: var(--paper-50);
}

.page-about .about-scale__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
}

/* ---------- 06 联系通道 ---------- */

.page-about .about-contact__grid {
  align-items: stretch;
}

.page-about .about-channel {
  height: 100%;
  padding: 24px 22px;
  border-radius: 4px;
}

.page-about .about-channel .panel__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(5, 10, 22, 0.48);
}

.page-about .about-channel .panel__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  color: var(--ink-950);
}

.page-about .about-channel__text {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(5, 10, 22, 0.76);
}

.page-about .about-channel__text a {
  color: #0d5a52;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-contact__bar {
  margin-top: 32px;
  padding: 26px 22px;
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  background: linear-gradient(135deg, rgba(18, 32, 60, 0.7), rgba(5, 10, 22, 0.9));
}

.page-about .about-contact__note {
  margin: 0;
  max-width: 62ch;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(243, 237, 226, 0.72);
}

.page-about .about-contact__list {
  display: grid;
  gap: 14px;
  margin: 22px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-contact__item {
  display: grid;
  gap: 4px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
}

.page-about .about-contact__k {
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--slate-400);
}

.page-about .about-contact__v {
  font-size: 15px;
  line-height: 1.6;
  color: var(--paper-50);
  word-break: break-word;
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .about-quads {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .about-scale__body {
    margin-top: 0;
  }

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

  .page-about .about-rail {
    margin: 0 -32px;
    padding: 0 32px;
  }
}

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: 7fr 5fr;
    gap: 48px;
    align-items: start;
  }

  .page-about .about-sec {
    padding-top: 92px;
  }

  .page-about .about-sec__head {
    grid-template-columns: 150px 1fr;
    gap: 32px;
    align-items: start;
    margin-bottom: 44px;
  }

  .page-about .about-sec__num {
    padding-top: 4px;
  }

  .page-about .about-team__side {
    margin-top: 0;
  }

  .page-about .about-flow__aside {
    margin-top: 0;
  }

  .page-about .about-contact__bar {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px 40px;
    align-items: start;
    padding: 32px 28px;
  }

  .page-about .about-contact__note {
    grid-column: 1 / -1;
  }

  .page-about .about-contact__list {
    margin-top: 0;
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .page-about .about-contact__actions {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1080px) {
  .page-about .about-scale__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-rail__viewport {
    padding-bottom: 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-way,
  .page-about .about-quad,
  .page-about .about-quad::before,
  .page-about .about-quick__link {
    transition: none;
  }

  .page-about .about-way:hover {
    transform: none;
  }
}