.page-about {
  --about-rail-w: 216px;
  --about-space: clamp(40px, 6vw, 78px);
  --about-gap: clamp(32px, 5vw, 64px);
  --tl-pad: clamp(28px, 4vw, 40px);
  background: var(--cream);
  color: var(--ink);
}

/* ---------- 封面 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--header-h) + clamp(40px, 7vw, 88px)) 0 clamp(72px, 9vw, 120px);
  background:
    radial-gradient(90% 70% at 84% 4%, rgba(217, 163, 60, .22), transparent 62%),
    radial-gradient(70% 60% at 4% 96%, rgba(106, 92, 255, .18), transparent 60%),
    linear-gradient(150deg, var(--crimson-deep) 0%, var(--crimson) 52%, #5F0E1C 100%);
  color: var(--cream);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(240, 208, 138, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(240, 208, 138, .07) 1px, transparent 1px);
  background-size: 56px 56px;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 78%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 78%);
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 56px;
  background: var(--cream);
  clip-path: polygon(0 100%, 100% 0, 100% 100%);
  pointer-events: none;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(30px, 4.5vw, 52px);
  align-items: center;
}

.page-about .about-crumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  font-size: 13px;
  letter-spacing: .04em;
  color: rgba(247, 240, 228, .62);
}

.page-about .about-crumbs a {
  color: var(--gold-light);
  text-decoration: none;
  border-bottom: 1px solid rgba(240, 208, 138, .32);
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-crumbs a:hover,
.page-about .about-crumbs a:focus-visible {
  border-bottom-color: var(--gold-light);
}

.page-about .about-crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(247, 240, 228, .38);
}

.page-about .about-hero h1 {
  margin: 0 0 clamp(18px, 2.4vw, 26px);
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -.02em;
  font-size: clamp(31px, 5.4vw, 60px);
  line-height: 1.12;
  color: #FFF8EA;
  text-shadow: 0 2px 0 rgba(74, 10, 22, .35);
}

.page-about .about-hero h1::after {
  content: "";
  display: block;
  width: 88px;
  height: 4px;
  margin-top: clamp(18px, 2.4vw, 26px);
  background: linear-gradient(90deg, var(--gold), rgba(240, 208, 138, 0));
}

.page-about .about-hero .lead {
  max-width: 48ch;
  margin: 0 0 clamp(26px, 3.4vw, 38px);
  font-family: var(--font-editorial);
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.78;
  color: rgba(247, 240, 228, .87);
}

.page-about .about-hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(20px, 3.2vw, 40px);
  padding-top: clamp(18px, 2.2vw, 26px);
  border-top: 1px solid var(--line-gold-soft);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 92px;
}

.page-about .about-stat .data-value {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1;
}

.page-about .about-stat-label {
  font-size: 12.5px;
  letter-spacing: .05em;
  color: rgba(247, 240, 228, .66);
}

.page-about .about-hero-figure {
  margin: 0;
  padding: 10px;
  border: 1px solid var(--line-gold);
  background: var(--glass);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  box-shadow: var(--shadow-2);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 24px), calc(100% - 24px) 100%, 0 100%);
}

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1200 / 800;
  object-fit: cover;
  filter: saturate(1.05) contrast(1.04);
}

/* ---------- 主体双栏 ---------- */
.page-about .about-body {
  display: grid;
  gap: var(--about-gap);
  padding-top: var(--about-space);
  padding-bottom: var(--about-space);
}

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

.page-about .about-rail-inner {
  border-top: 2px solid var(--ink);
  padding-top: 14px;
}

.page-about .about-rail-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--warm-gray);
}

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

.page-about .about-rail-link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 9px 0;
  font-size: 14px;
  color: var(--warm-gray);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-rail-link:hover,
.page-about .about-rail-link:focus-visible {
  color: var(--crimson);
  border-bottom-color: var(--line-gold);
}

.page-about .about-rail-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gold);
  letter-spacing: .05em;
}

.page-about .about-stream {
  display: grid;
  gap: clamp(44px, 6.5vw, 82px);
  min-width: 0;
}

/* ---------- 通用区块 ---------- */
.page-about .about-section {
  min-width: 0;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .about-sec-head {
  margin-bottom: clamp(20px, 2.6vw, 32px);
}

.page-about .about-sec-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -.018em;
  font-size: clamp(24px, 3.4vw, 38px);
  line-height: 1.2;
  color: var(--ink);
}

.page-about .about-stream p {
  margin: 0 0 1.15em;
  max-width: 68ch;
  font-size: 16.5px;
  line-height: 1.78;
  color: #2B221C;
}

.page-about .about-stream p:last-child {
  margin-bottom: 0;
}

.page-about .about-stream a {
  color: var(--crimson);
  text-decoration: none;
  border-bottom: 1px solid var(--line-gold);
}

.page-about .about-stream a:hover,
.page-about .about-stream a:focus-visible {
  border-bottom-color: var(--crimson);
}

/* ---------- 时间轴 ---------- */
.page-about .about-timeline {
  position: relative;
  padding: clamp(30px, 4.6vw, 54px) clamp(22px, 3.6vw, 46px);
  background:
    radial-gradient(80% 70% at 92% 6%, rgba(217, 163, 60, .2), transparent 60%),
    linear-gradient(142deg, var(--crimson-deep) 0%, var(--crimson) 58%, #5A0D1A 100%);
  color: var(--cream);
  clip-path: polygon(0 30px, 30px 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
}

.page-about .about-timeline .about-sec-title {
  color: #FFF8EA;
}

.page-about .about-tl-intro {
  margin: 0 0 clamp(24px, 3vw, 36px) !important;
  max-width: 60ch;
  font-family: var(--font-editorial);
  font-size: clamp(15px, 1.5vw, 17.5px);
  line-height: 1.78;
  color: rgba(247, 240, 228, .82);
}

.page-about .about-tl-list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 var(--tl-pad);
}

.page-about .about-tl-list::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  background: linear-gradient(to bottom, var(--gold), rgba(217, 163, 60, .16));
}

.page-about .about-tl-item {
  position: relative;
  padding-bottom: clamp(24px, 3.2vw, 36px);
}

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

.page-about .about-tl-item::before {
  content: "";
  position: absolute;
  left: calc(-1 * var(--tl-pad));
  top: 6px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--crimson-deep);
  border: 2px solid var(--gold);
  box-shadow: 0 0 0 4px rgba(217, 163, 60, .14);
}

.page-about .about-tl-version {
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 28px);
  letter-spacing: -.01em;
  line-height: 1.15;
  color: var(--gold-light);
}

.page-about .about-tl-stage {
  display: inline-block;
  margin-left: 12px;
  padding: 2px 9px;
  font-size: 12px;
  letter-spacing: .12em;
  color: rgba(240, 208, 138, .78);
  border: 1px solid var(--line-gold-soft);
  vertical-align: middle;
}

.page-about .about-tl-text {
  margin: 8px 0 0 !important;
  max-width: 60ch;
  font-size: 15.5px;
  line-height: 1.74;
  color: rgba(247, 240, 228, .84);
}

/* ---------- 档案字段 ---------- */
.page-about .about-field-grid {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-about .about-field {
  padding: clamp(16px, 2vw, 22px) 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-field-name {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 9px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--ink);
}

.page-about .about-field-name::after {
  content: "";
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, var(--line-gold), rgba(217, 163, 60, 0));
}

.page-about .about-field-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--gold);
}

.page-about .about-field-desc {
  margin: 0 !important;
  font-size: 15px;
  line-height: 1.72;
  color: var(--warm-gray);
}

/* ---------- 数据采集 ---------- */
.page-about .about-figure {
  margin: 0 0 clamp(22px, 3vw, 32px);
  padding: 8px;
  border: 1px solid var(--line);
  background: var(--paper);
  box-shadow: var(--shadow-1);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 20px), calc(100% - 20px) 100%, 0 100%);
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-flow {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(14px, 2vw, 22px);
}

.page-about .about-flow-step {
  display: flex;
  gap: 14px;
  padding: 18px 16px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-left: 3px solid var(--crimson);
  box-shadow: var(--shadow-1);
}

.page-about .about-flow-num {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--violet);
}

.page-about .about-flow-title {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-flow-step p {
  margin: 0 !important;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--warm-gray);
}

/* ---------- 赛区覆盖 ---------- */
.page-about .about-zones-map {
  margin: 0 0 clamp(22px, 3vw, 32px);
  padding: clamp(14px, 2.2vw, 24px);
  border: 1px solid var(--line);
  background: linear-gradient(150deg, rgba(122, 17, 34, .06), rgba(63, 200, 228, .09));
}

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

.page-about .zone-dot {
  fill: var(--crimson);
  transition: fill var(--dur) var(--ease);
}

.page-about .zone-dot--alt {
  fill: var(--violet);
}

.page-about .zone-dot:hover {
  fill: var(--cyan);
}

.page-about .about-figcap {
  margin-top: 12px;
  font-family: var(--font-editorial);
  font-size: 13.5px;
  letter-spacing: .02em;
  color: var(--warm-gray);
}

/* ---------- 荣誉 ---------- */
.page-about .about-awards {
  display: grid;
  gap: clamp(14px, 2vw, 20px);
  margin-bottom: clamp(22px, 3vw, 32px);
}

.page-about .about-award {
  padding: clamp(20px, 2.6vw, 28px);
  background: linear-gradient(160deg, var(--paper), #FBF3E3);
  border: 1px solid var(--line-gold);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-about .about-award-year {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--crimson);
}

.page-about .about-award-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-award-desc {
  margin: 0 !important;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--warm-gray);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding: clamp(30px, 4.6vw, 52px) clamp(22px, 3.6vw, 46px);
  background:
    radial-gradient(70% 90% at 88% 10%, rgba(106, 92, 255, .22), transparent 62%),
    linear-gradient(155deg, #241A15 0%, var(--ink) 60%, #1F1512 100%);
  color: var(--cream);
  clip-path: polygon(0 26px, 26px 0, 100% 0, 100% 100%, 0 100%);
}

.page-about .about-next-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 900;
  letter-spacing: -.018em;
  font-size: clamp(24px, 3.2vw, 36px);
  line-height: 1.2;
  color: #FFF8EA;
}

.page-about .about-next-text {
  margin: 0 0 clamp(22px, 3vw, 30px) !important;
  max-width: 62ch;
  font-family: var(--font-editorial);
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.78;
  color: rgba(247, 240, 228, .85);
}

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

.page-about .about-next .btn-outline {
  color: var(--cream);
  border-color: var(--line-gold);
}

.page-about .about-next .btn-outline:hover,
.page-about .about-next .btn-outline:focus-visible {
  color: var(--ink);
  background: var(--gold-light);
  border-color: var(--gold-light);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-about .about-field-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(20px, 3vw, 44px);
  }

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

@media (min-width: 760px) {
  .page-about .about-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 900px) {
  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
  }

  .page-about .about-hero-figure {
    justify-self: end;
    width: 100%;
  }
}

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    align-items: start;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-rail-link,
  .page-about .zone-dot,
  .page-about .about-crumbs a {
    transition: none;
  }
}