.page-about {
  --about-h2: clamp(28px, 4.6vw, 54px);
  --about-body-max: 64ch;
  --about-line: clamp(24px, 4vw, 48px);
  display: block;
  color: var(--fg);
  background:
    radial-gradient(120% 55% at 10% 0%, rgba(47, 191, 168, 0.10), transparent 62%),
    radial-gradient(90% 45% at 100% 6%, rgba(255, 90, 43, 0.09), transparent 60%),
    var(--bg);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-top: calc(var(--header-offset) + clamp(18px, 4vw, 44px));
  padding-bottom: clamp(36px, 6vw, 68px);
}

.page-about .about-hero-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: clamp(20px, 3.5vw, 36px);
}

.page-about .about-seat {
  flex: 0 0 auto;
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--lime);
  padding: 7px 12px;
  background: rgba(6, 16, 31, 0.78);
  box-shadow: inset 0 0 0 1px var(--line-gold);
  clip-path: var(--chamfer-s);
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 52px);
}

.page-about .about-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(42px, 9vw, 104px);
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--milk);
}

.page-about .about-title-sub {
  display: block;
  margin-top: clamp(14px, 2vw, 22px);
  font-size: clamp(15px, 2vw, 22px);
  font-weight: 600;
  line-height: 1.55;
  letter-spacing: 0;
  color: var(--lime);
  max-width: 24ch;
}

.page-about .about-lede {
  max-width: 56ch;
  margin: clamp(18px, 3vw, 28px) 0 0;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.78;
  color: var(--fg-soft);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 34px);
}

.page-about .about-coordinate {
  position: relative;
  padding: clamp(20px, 3vw, 30px);
  background: linear-gradient(155deg, rgba(6, 16, 31, 0.95), rgba(11, 27, 51, 0.68));
  box-shadow: inset 0 0 0 1px var(--line-gold), var(--shadow-panel);
  clip-path: var(--chamfer-l);
}

.page-about .about-coordinate::after {
  content: "";
  position: absolute;
  top: 18px;
  right: 18px;
  width: 42px;
  height: 2px;
  background: linear-gradient(90deg, var(--gold), transparent);
  transform: rotate(-24deg);
}

.page-about .about-coordinate-label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--fg-faint);
}

.page-about .about-coordinate-num {
  margin: 6px 0 0;
  font-size: clamp(56px, 10vw, 92px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--lime);
}

.page-about .about-coordinate-cap {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--fg-soft);
  max-width: 26ch;
}

.page-about .about-coordinate-list {
  list-style: none;
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-coordinate-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px dashed var(--line-soft);
  font-size: 14px;
  color: var(--fg-soft);
}

.page-about .about-coordinate-list li:last-child {
  border-bottom: 0;
}

.page-about .about-coordinate-list strong {
  font-size: 15px;
  color: var(--milk);
}

/* ---------- 吸顶章节导航 ---------- */
.page-about .about-anchors {
  position: sticky;
  top: var(--header-offset);
  z-index: 4;
  padding: 4px 0;
  background: linear-gradient(180deg, rgba(11, 27, 51, 0.97), rgba(11, 27, 51, 0.84));
  border-top: 1px solid var(--line-gold);
  border-bottom: 1px solid var(--line-gold);
}

.page-about .about-anchors-inner {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 5px 0;
}

.page-about .about-anchors-inner::-webkit-scrollbar {
  display: none;
}

.page-about .about-anchors a {
  flex: 0 0 auto;
  padding: 7px 13px;
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--fg-soft);
  text-decoration: none;
  background: rgba(56, 80, 110, 0.3);
  clip-path: var(--chamfer-s);
  white-space: nowrap;
  transition: color 0.2s ease, background 0.2s ease;
}

.page-about .about-anchors a:hover,
.page-about .about-anchors a:focus-visible {
  color: var(--ink);
  background: var(--lime);
}

/* ---------- 通用章节 ---------- */
.page-about .about-section {
  padding: clamp(52px, 8vw, 104px) 0;
  scroll-margin-top: calc(var(--header-offset) + 60px);
}

.page-about .about-h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--about-h2);
  line-height: 1.1;
  letter-spacing: -0.015em;
  color: var(--milk);
}

.page-about .about-body {
  max-width: var(--about-body-max);
  margin: clamp(14px, 2vw, 20px) 0 0;
  font-size: 16px;
  line-height: 1.78;
  color: var(--fg-soft);
}

.page-about .about-body a,
.page-about .lede a {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(199, 242, 60, 0.45);
}

.page-about .about-body a:hover,
.page-about .lede a:hover,
.page-about .about-body a:focus-visible,
.page-about .lede a:focus-visible {
  border-bottom-color: var(--lime);
}

/* ---------- 01 团队分工 ---------- */
.page-about .about-roles-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 52px);
}

.page-about .about-roles-bars {
  display: grid;
  gap: 12px;
  margin-top: clamp(24px, 4vw, 40px);
}

.page-about .about-role {
  padding: 15px 16px 17px;
  background: rgba(6, 16, 31, 0.62);
  box-shadow: inset 0 0 0 1px var(--line-soft);
  clip-path: var(--chamfer-s);
  outline: none;
  transition: background 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-role:hover,
.page-about .about-role:focus-visible {
  background: rgba(11, 27, 51, 0.92);
  box-shadow: inset 0 0 0 1px var(--line-gold);
}

.page-about .about-role-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
}

.page-about .about-role-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--milk);
}

.page-about .about-role-count {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--lime);
}

.page-about .about-role-track {
  margin-top: 10px;
  height: 6px;
  background: rgba(56, 80, 110, 0.55);
  clip-path: polygon(3px 0, 100% 0, 100% 100%, 0 100%, 0 3px);
  overflow: hidden;
}

.page-about .about-role-fill {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--scarf), var(--lime));
}

.page-about .about-role--editor .about-role-fill { width: 47%; }
.page-about .about-role--data .about-role-fill { width: 18%; }
.page-about .about-role--liaison .about-role-fill { width: 24%; }
.page-about .about-role--scout .about-role-fill { width: 12%; }

.page-about .about-role-desc {
  margin: 11px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--fg-soft);
}

.page-about .about-role-extra {
  display: grid;
  grid-template-rows: 0fr;
  opacity: 0;
  transition: grid-template-rows 0.3s ease, opacity 0.3s ease;
}

.page-about .about-role-extra > div {
  overflow: hidden;
  min-height: 0;
}

.page-about .about-role-extra p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--lime);
}

.page-about .about-role:hover .about-role-extra,
.page-about .about-role:focus-visible .about-role-extra,
.page-about .about-role:focus-within .about-role-extra {
  grid-template-rows: 1fr;
  opacity: 1;
}

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

/* ---------- 02 战报链路 ---------- */
.page-about .about-flow-head {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.5vw, 40px);
  align-items: end;
}

.page-about .about-flow-media {
  margin: 0;
}

.page-about .about-flow-head-copy .lede {
  max-width: 48ch;
  margin: 16px 0 0;
  color: var(--fg-soft);
  line-height: 1.78;
}

.page-about .about-flow-list {
  list-style: none;
  position: relative;
  margin: clamp(32px, 5vw, 58px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-flow-step {
  position: relative;
  padding: 18px 18px 20px;
  background: rgba(6, 16, 31, 0.62);
  box-shadow: inset 0 0 0 1px var(--line-soft);
  clip-path: var(--chamfer-s);
}

.page-about .about-flow-num {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-about .about-flow-name {
  margin: 8px 0 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--milk);
}

.page-about .about-flow-step p {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--fg-soft);
}

/* ---------- 03 看台覆盖 ---------- */
.page-about .about-map-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
}

.page-about .about-map-visual {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-about .about-grid {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: clamp(6px, 1.4vw, 10px);
  width: 100%;
  max-width: 400px;
}

.page-about .about-grid-dot {
  display: block;
  aspect-ratio: 1 / 1;
  background: var(--scarf);
  clip-path: polygon(6px 0, 100% 0, 100% calc(100% - 6px), calc(100% - 6px) 100%, 0 100%, 0 6px);
  opacity: 0.2;
  animation: about-dot-in 0.45s ease forwards;
  animation-delay: calc(var(--d, 0s) + var(--r, 0s));
}

.page-about .about-grid-dot:nth-child(7n+1) { --d: 0s; }
.page-about .about-grid-dot:nth-child(7n+2) { --d: 0.04s; }
.page-about .about-grid-dot:nth-child(7n+3) { --d: 0.08s; }
.page-about .about-grid-dot:nth-child(7n+4) { --d: 0.12s; }
.page-about .about-grid-dot:nth-child(7n+5) { --d: 0.16s; }
.page-about .about-grid-dot:nth-child(7n+6) { --d: 0.2s; }
.page-about .about-grid-dot:nth-child(7n+7) { --d: 0.24s; }
.page-about .about-grid-dot:nth-child(-n+7) { --r: 0s; }
.page-about .about-grid-dot:nth-child(n+8):nth-child(-n+14) { --r: 0.1s; }
.page-about .about-grid-dot:nth-child(n+15):nth-child(-n+21) { --r: 0.2s; }
.page-about .about-grid-dot:nth-child(n+22) { --r: 0.3s; }

@keyframes about-dot-in {
  to { opacity: 1; }
}

.page-about .about-grid-caption {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--fg-faint);
}

/* ---------- 04 版本时间轴 ---------- */
.page-about .about-timeline {
  list-style: none;
  position: relative;
  margin: clamp(32px, 5vw, 56px) 0 0;
  padding: 0;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 30px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(180deg, rgba(201, 150, 43, 0.72), rgba(47, 191, 168, 0.6), rgba(201, 150, 43, 0.12));
}

.page-about .about-tl-node {
  position: relative;
  padding: 0 0 clamp(26px, 4vw, 42px) 76px;
}

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

.page-about .about-tl-badge {
  position: absolute;
  left: 0;
  top: 0;
  width: 60px;
  height: 60px;
  display: grid;
  place-items: center;
  font-size: 14px;
  letter-spacing: 0.04em;
  color: var(--lime);
  background: var(--ink);
  box-shadow: inset 0 0 0 1px var(--line-gold);
  clip-path: var(--chamfer-s);
  transition: color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-tl-node:hover .about-tl-badge,
.page-about .about-tl-node:focus-within .about-tl-badge {
  color: var(--ink);
  background: var(--lime);
  box-shadow: inset 0 0 0 1px var(--lime);
}

.page-about .about-tl-node--live .about-tl-badge {
  box-shadow: inset 0 0 0 1px var(--lime);
}

.page-about .about-tl-tag {
  margin: 0;
}

.page-about .about-tl-body h3 {
  margin: 10px 0 0;
  font-size: clamp(17px, 2vw, 21px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--milk);
}

.page-about .about-tl-body p {
  margin: 8px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.76;
  color: var(--fg-soft);
}

/* ---------- 05 合作生态 ---------- */
.page-about .about-partners-media {
  margin: clamp(28px, 5vw, 48px) 0;
}

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

.page-about .about-partner-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: clamp(18px, 3vw, 26px);
  background: linear-gradient(120deg, rgba(6, 16, 31, 0.88), rgba(11, 27, 51, 0.5));
  box-shadow: inset 0 0 0 1px var(--line-soft);
  clip-path: var(--chamfer-m);
}

.page-about .about-partner-idx {
  font-size: clamp(22px, 3vw, 30px);
  line-height: 1;
  color: var(--gold);
}

.page-about .about-partner-body h3 {
  margin: 0;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 700;
  color: var(--milk);
}

.page-about .about-partner-body p {
  margin: 10px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.76;
  color: var(--fg-soft);
}

/* ---------- 06 反馈入口 ---------- */
.page-about .about-contribute-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 40px);
  padding: clamp(26px, 4vw, 52px);
  background: var(--milk);
  color: var(--ink);
  clip-path: var(--chamfer-l);
}

.page-about .about-contribute-panel .eyebrow {
  color: var(--gold);
}

.page-about .about-contribute-panel h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ink);
}

.page-about .about-contribute-panel p {
  margin: 14px 0 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.78;
  color: rgba(6, 16, 31, 0.78);
}

.page-about .about-contribute-panel p a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--flame);
}

.page-about .about-contribute-panel p a:hover,
.page-about .about-contribute-panel p a:focus-visible {
  color: var(--flame);
}

.page-about .about-contribute-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-contribute-panel .btn--ghost {
  color: var(--ink);
  background: transparent;
  box-shadow: inset 0 0 0 1px rgba(11, 27, 51, 0.35);
}

.page-about .about-contribute-panel .btn--ghost:hover,
.page-about .about-contribute-panel .btn--ghost:focus-visible {
  box-shadow: inset 0 0 0 1px rgba(11, 27, 51, 0.75);
}

.page-about .about-contribute-side {
  align-self: start;
  padding: 18px 20px;
  background: rgba(11, 27, 51, 0.06);
  box-shadow: inset 0 0 0 1px rgba(11, 27, 51, 0.14);
  clip-path: var(--chamfer-s);
}

.page-about .about-contribute-side p {
  margin: 4px 0 0;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(6, 16, 31, 0.82);
}

.page-about .about-contribute-side .mono {
  margin-top: 14px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: rgba(6, 16, 31, 0.52);
}

.page-about .about-contribute-side .mono:first-child {
  margin-top: 0;
}

.page-about .about-contribute-note {
  font-size: 13.5px;
  color: rgba(6, 16, 31, 0.6);
}

/* ---------- 响应式 ---------- */
@media (max-width: 420px) {
  .page-about .about-tl-node {
    padding-left: 66px;
  }

  .page-about .about-tl-badge {
    width: 52px;
    height: 52px;
    font-size: 13px;
  }

  .page-about .about-timeline::before {
    left: 26px;
  }

  .page-about .about-seat {
    font-size: 12px;
    letter-spacing: 0.14em;
  }
}

@media (min-width: 760px) {
  .page-about .about-partner-item {
    grid-template-columns: 60px minmax(0, 1fr);
    gap: 20px;
  }

  .page-about .about-partner-item:nth-child(2) {
    margin-left: 5%;
  }

  .page-about .about-partner-item:nth-child(3) {
    margin-left: 10%;
  }

  .page-about .about-map-visual {
    align-items: flex-start;
  }

  .page-about .about-flow-head {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    gap: clamp(26px, 4vw, 48px);
  }
}

@media (min-width: 880px) {
  .page-about .about-flow-list {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-flow-list::before {
    content: "";
    position: absolute;
    left: -3%;
    right: -3%;
    top: -12px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--gold) 12%, var(--scarf) 78%, transparent);
    transform: rotate(6deg);
    transform-origin: left top;
    pointer-events: none;
  }

  .page-about .about-flow-step:nth-child(2n) {
    transform: translateY(24px);
  }
}

@media (min-width: 940px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: end;
  }

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

  .page-about .about-map-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: center;
  }

  .page-about .about-contribute-panel {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 0.7fr);
    align-items: start;
  }

  .page-about .about-tl-node {
    padding-left: 96px;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .about-grid-dot {
    animation: none;
    opacity: 1;
  }

  .page-about .about-role-extra,
  .page-about .about-role,
  .page-about .about-tl-badge,
  .page-about .about-anchors a {
    transition: none;
  }

  .page-about .about-flow-step:nth-child(2n) {
    transform: none;
  }

  .page-about .about-flow-list::before {
    transform: none;
  }
}