.page-about {
  --about-soft-ink: rgba(7, 11, 18, 0.66);
  --about-soft-bone: rgba(245, 241, 232, 0.74);
  --about-line-dark: rgba(7, 11, 18, 0.14);
  --about-line-light: rgba(201, 216, 232, 0.22);
  background: var(--bone);
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
}

.page-about .page-shell {
  padding-inline: clamp(18px, 4vw, 48px);
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  letter-spacing: -0.02em;
}

.page-about h2 {
  margin: 0 0 14px;
  font-weight: 900;
  font-size: clamp(26px, 4.2vw, 46px);
  line-height: 1.14;
}

.page-about h3 {
  margin: 0 0 8px;
  font-weight: 700;
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.32;
}

.page-about p {
  margin: 0 0 14px;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: var(--about-soft-ink);
}

.page-about .num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--steel);
  position: relative;
  z-index: 2;
}

.page-about .about-crumb {
  color: var(--frost);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-about .about-crumb:hover,
.page-about .about-crumb:focus-visible {
  color: var(--mint);
}

.page-about .about-crumb--current {
  color: var(--gold);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 4vw, 40px) 0 clamp(36px, 6vw, 76px);
  color: var(--bone);
  background:
    radial-gradient(115% 85% at 86% 4%, rgba(215, 38, 61, 0.34) 0%, rgba(215, 38, 61, 0) 56%),
    radial-gradient(90% 80% at 4% 102%, rgba(49, 242, 195, 0.16) 0%, rgba(49, 242, 195, 0) 62%),
    linear-gradient(168deg, var(--rain) 0%, var(--night) 44%, var(--ink) 100%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(112deg, rgba(201, 216, 232, 0.07) 0 1px, transparent 1px 76px);
  opacity: 0.55;
}

.page-about .hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 48px);
  align-items: end;
  margin-top: clamp(22px, 4vw, 40px);
}

.page-about .hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--frost);
}

.page-about .hero-kicker-dot {
  width: 8px;
  height: 8px;
  background: var(--red);
  transform: rotate(45deg);
  box-shadow: 0 0 0 4px rgba(215, 38, 61, 0.2);
}

.page-about .hero-copy h1 {
  margin: 0 0 20px;
  font-weight: 900;
  font-size: clamp(32px, 6.2vw, 74px);
  line-height: 1.04;
  color: var(--bone);
  text-wrap: balance;
}

.page-about .hero-lead {
  max-width: 56ch;
  margin: 0 0 26px;
  font-size: clamp(15px, 1.7vw, 18px);
  line-height: 1.76;
  color: var(--about-soft-bone);
}

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

.page-about .hero-media {
  position: relative;
  margin: 0;
  border: 1px solid var(--about-line-light);
  background: var(--rain);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
  overflow: hidden;
}

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

.page-about .hero-media-cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 16px;
  background: var(--red);
  color: var(--bone);
  font-size: 11px;
  letter-spacing: 0.12em;
  clip-path: polygon(0 0, 100% 0, 100% 100%, 0 100%, 10px 50%);
}

.page-about .hero-strip {
  position: relative;
  z-index: 2;
  list-style: none;
  margin: clamp(28px, 4vw, 52px) 0 0;
  padding: clamp(16px, 2.4vw, 26px) 0 0;
  border-top: 1px solid var(--about-line-light);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: clamp(14px, 2.4vw, 30px);
}

.page-about .strip-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding-left: 14px;
  border-left: 2px solid rgba(201, 216, 232, 0.28);
}

.page-about .strip-item:first-child {
  border-left-color: var(--mint);
}

.page-about .strip-num {
  font-size: clamp(26px, 3.6vw, 40px);
  font-weight: 600;
  line-height: 1;
  color: var(--mint);
}

.page-about .strip-label {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--frost);
}

/* ---------- 区块通用 ---------- */
.page-about .about-section {
  position: relative;
  padding: clamp(52px, 8vw, 104px) 0;
}

.page-about .section-head {
  max-width: 780px;
  margin-bottom: clamp(28px, 4vw, 48px);
}

.page-about .section-head--tight {
  margin-bottom: clamp(22px, 3vw, 32px);
}

.page-about .section-head--invert h2 {
  color: var(--bone);
}

.page-about .section-head--invert p {
  color: var(--about-soft-bone);
}

.page-about .section-index {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--red);
}

.page-about .section-index::after {
  content: "";
  flex: 0 1 110px;
  height: 1px;
  background: currentColor;
  opacity: 0.4;
}

.page-about .section-head--invert .section-index {
  color: var(--gold);
}

.page-about .section-lead {
  margin: 0;
  max-width: 64ch;
}

/* ---------- 01 赛前 ---------- */
.page-about .sec-system {
  background: var(--bone);
}

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

.page-about .sys-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 4px 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--about-line-dark);
  transition: padding-left var(--dur) var(--ease);
}

.page-about .sys-idx {
  grid-row: span 2;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--red);
  padding-top: 4px;
}

.page-about .sys-name {
  margin: 0;
}

.page-about .sys-desc {
  margin: 0;
  max-width: 68ch;
}

.page-about .sys-row:hover {
  padding-left: 8px;
}

@media (min-width: 860px) {
  .page-about .sys-row {
    grid-template-columns: 88px minmax(0, 0.75fr) minmax(0, 1.5fr);
    gap: 20px;
    align-items: baseline;
    padding: 26px 0;
  }

  .page-about .sys-idx {
    grid-row: auto;
    font-size: 15px;
  }

  .page-about .sys-name {
    margin: 0;
  }

  .page-about .sys-desc {
    margin: 0;
  }
}

/* ---------- 02 场景与人群 ---------- */
.page-about .sec-scene {
  background: var(--rain);
  color: var(--bone);
}

.page-about .scene-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-about .scene-card {
  position: relative;
  padding: clamp(22px, 3vw, 32px);
  background: rgba(245, 241, 232, 0.055);
  border: 1px solid var(--about-line-light);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
  transition: background var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .scene-card:hover {
  background: rgba(245, 241, 232, 0.09);
  transform: translateY(-3px);
}

.page-about .scene-card h3 {
  color: var(--bone);
}

.page-about .scene-card p {
  margin: 0;
  color: var(--about-soft-bone);
}

.page-about .scene-tag {
  display: inline-block;
  margin: 0 0 12px;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  border: 1px solid currentColor;
}

.page-about .scene-tag.tag--accent {
  color: var(--mint);
}

.page-about .scene-tag.tag--gold {
  color: var(--gold);
}

.page-about .scene-tag.tag--ghost {
  color: var(--frost);
}

.page-about .crowd-panel {
  margin-top: clamp(24px, 4vw, 40px);
  padding: clamp(22px, 3vw, 34px);
  border-left: 3px solid var(--red);
  background: linear-gradient(100deg, rgba(215, 38, 61, 0.14) 0%, rgba(215, 38, 61, 0) 62%);
}

.page-about .crowd-title {
  margin: 0 0 18px;
  color: var(--bone);
}

.page-about .crowd-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-about .crowd-item {
  display: grid;
  gap: 4px;
  padding-top: 12px;
  border-top: 1px solid rgba(201, 216, 232, 0.16);
}

.page-about .crowd-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  color: var(--mint);
}

.page-about .crowd-desc {
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--about-soft-bone);
}

/* ---------- 03 内容链 ---------- */
.page-about .sec-chain {
  background:
    radial-gradient(80% 70% at 92% 0%, rgba(215, 38, 61, 0.22) 0%, rgba(215, 38, 61, 0) 58%),
    var(--ink);
  color: var(--bone);
}

.page-about .chain {
  position: relative;
}

.page-about .chain-tabbar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-about .chain-tab {
  position: relative;
  flex: 1 1 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 18px;
  border: 1px solid var(--about-line-light);
  background: rgba(201, 216, 232, 0.05);
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%);
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .chain-input {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  margin: 0;
  opacity: 0;
  cursor: pointer;
}

.page-about .chain-tab-text {
  position: relative;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--frost);
  transition: color var(--dur) var(--ease);
}

.page-about .chain-tab:hover {
  border-color: var(--red-soft);
}

.page-about .chain-tab:has(.chain-input:checked) {
  background: var(--red);
  border-color: var(--red);
}

.page-about .chain-tab:has(.chain-input:checked) .chain-tab-text {
  color: var(--bone);
}

.page-about .chain-tab:has(.chain-input:focus-visible) {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}

.page-about .chain-panel {
  display: none;
  padding: clamp(22px, 3.4vw, 38px);
  border: 1px solid var(--about-line-light);
  border-top: 3px solid var(--mint);
  background: rgba(20, 44, 77, 0.55);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .chain-panel h3 {
  color: var(--bone);
  font-size: clamp(19px, 2.6vw, 27px);
  margin-bottom: 12px;
}

.page-about .chain-panel p {
  margin: 0;
  max-width: 70ch;
  color: var(--about-soft-bone);
}

.page-about .chain-kicker {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

@supports selector(:has(*)) {
  .page-about .chain:has(#chain-pre:checked) #chain-panel-pre,
  .page-about .chain:has(#chain-live:checked) #chain-panel-live,
  .page-about .chain:has(#chain-post:checked) #chain-panel-post {
    display: block;
  }
}

@supports not selector(:has(*)) {
  .page-about .chain-panel {
    display: block;
    margin-bottom: 16px;
  }
}

/* ---------- 04 球队档案 ---------- */
.page-about .sec-archive {
  background: var(--frost);
}

.page-about .archive-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-about .archive-media {
  margin: 0;
  border: 1px solid rgba(7, 11, 18, 0.18);
  background: var(--night);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 34px), calc(100% - 34px) 100%, 0 100%);
  overflow: hidden;
}

.page-about .archive-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .archive-ways {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-about .way-item {
  padding: 16px 0 16px 18px;
  border-left: 2px solid var(--red);
  background: linear-gradient(90deg, rgba(245, 241, 232, 0.85) 0%, rgba(245, 241, 232, 0) 92%);
}

.page-about .way-item h3 {
  margin: 0 0 6px;
  font-size: clamp(16px, 1.9vw, 19px);
}

.page-about .way-item p {
  margin: 0;
  font-size: 15px;
}

.page-about .archive-note {
  margin: 0;
  padding: 16px 18px;
  border-top: 1px solid rgba(7, 11, 18, 0.2);
  border-bottom: 1px solid rgba(7, 11, 18, 0.2);
  font-size: 15px;
}

/* ---------- 05 时间线 ---------- */
.page-about .sec-timeline {
  background: var(--bone);
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0 0 0 22px;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, var(--red) 0%, rgba(215, 38, 61, 0.15) 100%);
}

.page-about .tl-item {
  position: relative;
  padding: 0 0 clamp(24px, 3.6vw, 40px) 0;
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 12px;
  width: 9px;
  height: 9px;
  background: var(--bone);
  border: 2px solid var(--red);
  transform: rotate(45deg);
}

.page-about .tl-item--gold::before {
  background: var(--gold);
  border-color: var(--gold);
  box-shadow: 0 0 0 5px rgba(242, 180, 65, 0.22);
}

.page-about .tl-year {
  display: block;
  font-size: clamp(28px, 4.4vw, 46px);
  font-weight: 600;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--red);
  margin-bottom: 8px;
}

.page-about .tl-item--gold .tl-year {
  color: var(--gold);
}

.page-about .tl-body h3 {
  margin: 0 0 6px;
}

.page-about .tl-body p {
  margin: 0;
  max-width: 62ch;
}

@media (min-width: 860px) {
  .page-about .timeline {
    padding-left: 0;
  }

  .page-about .timeline::before {
    left: 148px;
  }

  .page-about .tl-item {
    display: grid;
    grid-template-columns: 130px minmax(0, 1fr);
    gap: 0 52px;
    padding-bottom: clamp(30px, 4vw, 52px);
  }

  .page-about .tl-item::before {
    left: 143px;
    top: 14px;
  }

  .page-about .tl-year {
    font-size: clamp(38px, 4vw, 54px);
    margin-bottom: 0;
    text-align: right;
  }

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

/* ---------- 06 更新节奏 ---------- */
.page-about .sec-cadence {
  background: var(--bone);
  border-top: 1px solid var(--about-line-dark);
}

.page-about .cadence-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 52px);
  align-items: start;
}

.page-about .cadence-stats {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-line-dark);
  border: 1px solid var(--about-line-dark);
}

.page-about .cadence-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(16px, 2.4vw, 22px);
  background: var(--bone);
}

.page-about .cadence-num {
  font-size: clamp(30px, 4.6vw, 46px);
  font-weight: 600;
  line-height: 1;
  color: var(--red);
}

.page-about .cadence-stat:nth-child(2) .cadence-num {
  color: var(--gold);
}

.page-about .cadence-stat:nth-child(3) .cadence-num {
  color: var(--night);
}

.page-about .cadence-label {
  font-size: 13px;
  line-height: 1.55;
  color: var(--about-soft-ink);
}

.page-about .cadence-media {
  margin: 0;
  border: 1px solid rgba(7, 11, 18, 0.16);
  background: var(--night);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 30px), calc(100% - 30px) 100%, 0 100%);
  overflow: hidden;
}

.page-about .cadence-media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 7 / 4;
  object-fit: cover;
}

.page-about .cadence-media figcaption {
  padding: 12px 18px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--frost);
  background: rgba(7, 11, 18, 0.72);
}

/* ---------- 07 选择理由 ---------- */
.page-about .sec-why {
  background:
    radial-gradient(70% 90% at 0% 0%, rgba(49, 242, 195, 0.1) 0%, rgba(49, 242, 195, 0) 60%),
    linear-gradient(155deg, var(--night) 0%, var(--ink) 100%);
  color: var(--bone);
}

.page-about .why-list {
  list-style: none;
  margin: 0 0 clamp(28px, 4vw, 44px);
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-line-light);
  border: 1px solid var(--about-line-light);
}

.page-about .why-item {
  padding: clamp(20px, 3vw, 30px);
  background: rgba(7, 11, 18, 0.55);
  transition: background var(--dur) var(--ease);
}

.page-about .why-item:hover {
  background: rgba(20, 44, 77, 0.85);
}

.page-about .why-idx {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .why-item h3 {
  color: var(--bone);
}

.page-about .why-item p {
  margin: 0;
  color: var(--about-soft-bone);
  font-size: 15px;
}

.page-about .why-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.page-about .why-contact {
  flex: 1 1 260px;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--steel);
}

/* ---------- 响应式栅格 ---------- */
@media (min-width: 720px) {
  .page-about .scene-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .crowd-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 28px;
  }

  .page-about .archive-ways {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }

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

  .page-about .strip-item {
    padding-left: 18px;
  }
}

@media (min-width: 900px) {
  .page-about .hero-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
  }

  .page-about .hero-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .archive-grid {
    grid-template-columns: minmax(0, 0.82fr) minmax(0, 1.18fr);
    align-items: center;
  }

  .page-about .cadence-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
  }
}

@media (min-width: 1100px) {
  .page-about .why-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (max-width: 480px) {
  .page-about .cadence-stats {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-about .hero-actions .btn {
    flex: 1 1 100%;
    text-align: center;
  }

  .page-about .chain-tab {
    flex: 1 1 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .scene-card,
  .page-about .sys-row,
  .page-about .why-item,
  .page-about .chain-tab,
  .page-about .chain-tab-text {
    transition: none;
  }

  .page-about .scene-card:hover {
    transform: none;
  }

  .page-about .sys-row:hover {
    padding-left: 0;
  }
}
<<<END>>>