/* ===== 品牌脉络页 page-about ===== */
.page-about {
  --ab-rule: rgba(242, 239, 230, 0.13);
  --ab-rule-soft: rgba(242, 239, 230, 0.07);
  --ab-muted: rgba(242, 239, 230, 0.74);
  padding-bottom: clamp(48px, 8vw, 96px);
  overflow-x: clip;
}

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

.page-about .breadcrumb {
  margin-top: clamp(14px, 2.4vw, 26px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(22px, 4vw, 44px) 0 clamp(34px, 5vw, 64px);
  border-bottom: 1px solid var(--ab-rule);
  background-image: linear-gradient(to right, rgba(242, 239, 230, 0.045) 1px, transparent 1px);
  background-size: clamp(58px, 8vw, 96px) 100%;
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: end;
}

.page-about .about-hero__kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 clamp(14px, 2vw, 20px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-about .about-hero__kicker::before {
  content: "";
  width: 26px;
  height: 1px;
  background: var(--cyan);
}

.page-about .about-hero h1 {
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  font-family: var(--font-display);
  font-size: clamp(29px, 5.6vw, 58px);
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero__intro {
  margin: 0;
  max-width: 36em;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.9;
  color: var(--ab-muted);
}

.page-about .about-hero__quote {
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--clay);
  font-family: var(--font-display);
  font-size: clamp(15px, 1.8vw, 19px);
  letter-spacing: 0.04em;
  color: var(--paper);
}

.page-about .about-hero__facts {
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--ab-rule);
  border-left: 3px solid var(--clay);
  background: linear-gradient(165deg, rgba(17, 28, 46, 0.92), rgba(11, 18, 32, 0.55));
}

.page-about .about-hero__facts-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--stone);
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(14px, 2vw, 20px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-fact {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-top: 10px;
  border-top: 1px solid var(--ab-rule-soft);
}

.page-about .about-fact__n {
  font-family: var(--font-mono);
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-fact__u {
  font-size: 0.56em;
  margin-left: 2px;
  color: var(--paper);
}

.page-about .about-fact__t {
  font-size: 13px;
  color: var(--stone);
  letter-spacing: 0.02em;
}

/* ---------- 正文骨架 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  padding-top: clamp(28px, 4vw, 56px);
}

.page-about .about-rail__inner {
  position: static;
}

.page-about .about-toc {
  display: flex;
  flex-direction: row;
  gap: 18px;
  overflow-x: auto;
  padding: 10px 0 0;
  border-top: 1px solid var(--ab-rule);
  scrollbar-width: thin;
}

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

.page-about .about-toc a {
  flex: none;
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 4px 0;
  border-bottom: 2px solid transparent;
  font-size: 14px;
  white-space: nowrap;
  color: var(--stone);
  text-decoration: none;
  transition: color 0.16s ease, border-color 0.16s ease;
}

.page-about .about-toc a span {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--slate);
}

.page-about .about-toc a:hover,
.page-about .about-toc a:focus-visible {
  color: var(--paper);
}

.page-about .about-toc a.is-active,
.page-about .about-toc a[aria-current] {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-about .about-toc a.is-active span,
.page-about .about-toc a[aria-current] span {
  color: var(--cyan);
}

/* ---------- 章节 ---------- */
.page-about .about-sec {
  padding: clamp(30px, 4.4vw, 54px) 0;
  border-top: 1px solid var(--ab-rule);
  scroll-margin-top: calc(var(--header-h) + 20px);
}

.page-about .about-flow > .about-sec:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-sec__head {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: clamp(14px, 2vw, 20px);
}

.page-about .about-sec__no {
  flex: none;
  margin-top: 4px;
  padding: 2px 7px;
  border: 1px solid rgba(44, 229, 208, 0.38);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

.page-about .about-sec h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(23px, 3.6vw, 40px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.012em;
  color: var(--paper);
}

.page-about .about-p {
  max-width: 36em;
  margin: 0 0 clamp(12px, 1.6vw, 18px);
  font-size: clamp(15px, 1.5vw, 16.5px);
  line-height: 1.9;
  color: var(--ab-muted);
}

.page-about .about-p--note {
  margin-top: clamp(16px, 2.4vw, 24px);
  padding-left: 14px;
  border-left: 2px solid var(--moss);
}

.page-about .about-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(44, 229, 208, 0.45);
  transition: border-color 0.16s ease, color 0.16s ease;
}

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

/* 图片容器 */
.page-about .about-figure {
  margin: clamp(20px, 3vw, 30px) 0 clamp(18px, 2.6vw, 26px);
}

.page-about .about-figure .media-frame__img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-about .about-figure .media-frame__cap {
  font-size: 13px;
  letter-spacing: 0.02em;
}

/* 三层结构 */
.page-about .about-layers {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--ab-rule);
}

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

.page-about .about-layer__k {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--clay);
}

.page-about .about-layer p {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ab-muted);
}

/* ---------- 联赛坐标图 ---------- */
.page-about .about-map {
  margin: clamp(18px, 3vw, 28px) 0;
  padding: clamp(12px, 2vw, 20px) clamp(10px, 2vw, 18px) clamp(6px, 1.4vw, 10px);
  border: 1px solid var(--ab-rule);
  background: linear-gradient(160deg, rgba(17, 28, 46, 0.9), rgba(11, 18, 32, 0.4));
  overflow-x: auto;
  scrollbar-width: thin;
}

.page-about .about-map svg {
  display: block;
  width: 100%;
  min-width: 620px;
  height: auto;
}

.page-about .about-map__axis {
  stroke: var(--paper);
  stroke-opacity: 0.34;
  stroke-width: 1;
}

.page-about .about-map__tick {
  stroke: var(--stone);
  stroke-width: 1;
}

.page-about .about-map__node line {
  stroke: var(--cyan);
  stroke-opacity: 0.5;
  stroke-width: 1;
  stroke-dasharray: 2 4;
}

.page-about .about-map__node circle {
  fill: var(--cyan);
}

.page-about .about-map__node text {
  fill: var(--paper);
  font-family: var(--font-body);
  font-size: 15px;
  letter-spacing: 0.02em;
}

/* ---------- 五个栏目 ---------- */
.page-about .about-columns {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(14px, 2vw, 20px);
}

.page-about .about-col {
  padding-top: 12px;
  border-top: 1px solid var(--ab-rule-soft);
}

.page-about .about-col h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
  letter-spacing: 0.01em;
}

.page-about .about-col h3::before {
  content: "— ";
  color: var(--cyan);
}

.page-about .about-col p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ab-muted);
}

/* ---------- 时间线 ---------- */
.page-about .about-yearnav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: clamp(16px, 2.4vw, 24px) 0 clamp(10px, 1.6vw, 16px);
}

.page-about .about-yearnav a {
  padding: 5px 11px;
  border: 1px solid var(--ab-rule);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--stone);
  text-decoration: none;
  transition: color 0.16s ease, border-color 0.16s ease, background 0.16s ease;
}

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

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

.page-about .about-tl {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: clamp(16px, 2.4vw, 22px) 0;
  border-top: 1px dashed var(--ab-rule);
  scroll-margin-top: calc(var(--header-h) + 22px);
}

.page-about .about-tl__year {
  align-self: start;
  padding-left: 10px;
  border-left: 2px solid var(--clay);
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.4vw, 24px);
  line-height: 1.2;
  letter-spacing: 0.04em;
  color: var(--clay);
}

.page-about .about-tl__body h3 {
  margin: 0 0 6px;
  font-size: clamp(16px, 2vw, 19px);
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-tl__body p {
  max-width: 44em;
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ab-muted);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-team__row {
  display: grid;
  grid-template-columns: 4.6em minmax(0, 1fr) 2.2em;
  align-items: center;
  gap: 10px;
}

.page-about .about-team__name {
  font-size: 14px;
  color: var(--ab-muted);
  white-space: nowrap;
}

.page-about .about-team__track {
  height: 9px;
  border-left: 1px solid var(--line-strong);
  background: rgba(242, 239, 230, 0.06);
}

.page-about .about-team__fill {
  display: block;
  width: var(--w, 100%);
  height: 100%;
  background: linear-gradient(90deg, rgba(44, 229, 208, 0.85), rgba(44, 229, 208, 0.28));
}

.page-about .about-team__row:nth-child(2) .about-team__fill {
  background: linear-gradient(90deg, rgba(255, 122, 61, 0.85), rgba(255, 122, 61, 0.26));
}

.page-about .about-team__row:nth-child(3) .about-team__fill {
  background: linear-gradient(90deg, rgba(217, 164, 65, 0.85), rgba(217, 164, 65, 0.26));
}

.page-about .about-team__row:nth-child(4) .about-team__fill {
  background: linear-gradient(90deg, rgba(111, 127, 94, 0.95), rgba(111, 127, 94, 0.3));
}

.page-about .about-team__row:nth-child(5) .about-team__fill {
  background: linear-gradient(90deg, rgba(184, 107, 75, 0.95), rgba(184, 107, 75, 0.3));
}

.page-about .about-team__n {
  font-family: var(--font-mono);
  font-size: 16px;
  text-align: right;
  color: var(--paper);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
  gap: clamp(10px, 1.6vw, 14px);
  margin: clamp(18px, 2.6vw, 26px) 0 clamp(20px, 3vw, 30px);
  padding: 0;
  list-style: none;
  align-items: start;
}

.page-about .about-eco__chip {
  display: block;
  padding: 13px 14px;
  border: 1px solid var(--ab-rule);
  border-top: 2px solid var(--clay);
  background: rgba(17, 28, 46, 0.55);
  font-size: 15px;
  letter-spacing: 0.02em;
  color: var(--paper);
  cursor: default;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.page-about .about-eco__chip:hover,
.page-about .about-eco__chip:focus,
.page-about .about-eco__chip:focus-visible {
  border-color: rgba(44, 229, 208, 0.42);
  background: rgba(17, 28, 46, 0.85);
  outline: none;
}

.page-about .about-eco__note {
  display: block;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  margin-top: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ab-muted);
  transition: max-height 0.2s ease, opacity 0.2s ease, margin-top 0.2s ease;
}

.page-about .about-eco__chip:hover .about-eco__note,
.page-about .about-eco__chip:focus .about-eco__note,
.page-about .about-eco__chip:focus-visible .about-eco__note {
  max-height: 8em;
  opacity: 1;
  margin-top: 8px;
}

.page-about .about-honor {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: clamp(16px, 2.2vw, 22px);
  border: 1px solid rgba(184, 107, 75, 0.5);
  background: linear-gradient(150deg, rgba(184, 107, 75, 0.16), rgba(11, 18, 32, 0.4));
}

.page-about .about-honor__year {
  flex: none;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.06em;
  color: var(--amber);
}

.page-about .about-honor__title {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}

.page-about .about-honor__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ab-muted);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  margin-top: clamp(30px, 4.4vw, 54px);
  padding: clamp(24px, 3.6vw, 44px);
  border: 1px solid var(--ab-rule);
  border-left: 3px solid var(--orange);
  background: linear-gradient(150deg, rgba(255, 122, 61, 0.1), rgba(11, 18, 32, 0.35));
}

.page-about .about-cta__kicker {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--orange);
}

.page-about .about-cta h2 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(21px, 3vw, 32px);
  font-weight: 800;
  line-height: 1.25;
  color: var(--paper);
}

.page-about .about-cta p {
  max-width: 34em;
  margin: 0 0 clamp(16px, 2.4vw, 24px);
  font-size: 15px;
  line-height: 1.85;
  color: var(--ab-muted);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-layers {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: clamp(16px, 2.4vw, 26px) clamp(18px, 3vw, 34px);
  }
}

@media (min-width: 720px) {
  .page-about .about-tl {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: clamp(14px, 2.6vw, 30px);
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: clamp(30px, 5vw, 68px);
  }

  .page-about .about-map svg {
    min-width: 0;
  }

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

@media (min-width: 1000px) {
  .page-about .about-body {
    grid-template-columns: 208px minmax(0, 1fr);
    gap: clamp(40px, 6vw, 84px);
  }

  .page-about .about-rail__inner {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-about .about-toc {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    padding: 0;
    border-top: 0;
    border-left: 1px solid var(--ab-rule);
  }

  .page-about .about-toc__label {
    display: block;
    margin: 0 0 10px;
    padding-left: 14px;
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.18em;
    color: var(--stone);
  }

  .page-about .about-toc a {
    margin-left: -1px;
    padding: 8px 0 8px 14px;
    border-bottom: 0;
    border-left: 2px solid transparent;
    white-space: normal;
  }

  .page-about .about-toc a.is-active,
  .page-about .about-toc a[aria-current] {
    border-bottom-color: transparent;
    border-left-color: var(--cyan);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-toc a,
  .page-about .about-yearnav a,
  .page-about .about-eco__chip,
  .page-about .about-eco__note,
  .page-about .about-link {
    transition: none;
  }
}

.page-about {
  --w: 1rem;
}