.page-about {
  --about-pad: clamp(56px, 8vw, 104px);
  --about-face: #CBD8E3;
  background: var(--paper);
  color: var(--brown);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background:
    repeating-linear-gradient(135deg, rgba(31, 74, 107, 0.55) 0 1px, transparent 1px 15px),
    var(--ink);
  color: var(--cream);
  padding: calc(var(--header-space) + 34px) 0 clamp(96px, 12vw, 148px);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: min(48%, 520px);
  height: clamp(52px, 8vw, 120px);
  background: var(--paper);
  clip-path: polygon(100% 0, 100% 100%, 0 100%);
  pointer-events: none;
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(28px, 5vw, 48px);
}

.page-about .about-hero .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  font-size: 13px;
  letter-spacing: 0.04em;
}

.page-about .about-hero .breadcrumb-list li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: var(--ink-line);
}

.page-about .about-hero .breadcrumb-link {
  color: var(--lime);
  text-decoration: none;
}

.page-about .about-hero .breadcrumb-list li span {
  color: var(--mist);
}

.page-about .about-kicker {
  margin: 0 0 16px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-about .about-hero-title {
  margin: 0 0 22px;
  max-width: 15em;
  font-size: clamp(34px, 6.6vw, 76px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-hero-lead {
  margin: 0 0 30px;
  max-width: 33em;
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.85;
  color: var(--mist);
}

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

.page-about .about-facts {
  border: 3px solid var(--ink-line);
  border-radius: var(--radius-card);
  background: var(--ink-2);
  padding: clamp(20px, 3vw, 28px);
}

.page-about .about-facts-title {
  margin: 0 0 18px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--lime);
}

.page-about .about-fact-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-fact {
  border-top: 1px solid var(--ink-line);
  padding-top: 12px;
}

.page-about .about-fact-num {
  display: block;
  font-size: clamp(26px, 3.4vw, 36px);
  font-weight: 900;
  line-height: 1;
  color: var(--paper);
}

.page-about .about-fact-num small,
.page-about .about-team-count small,
.page-about .about-stat-num small {
  font-size: 0.42em;
  font-weight: 700;
  margin-left: 2px;
  letter-spacing: 0;
}

.page-about .about-fact-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--mist);
}

/* ---------- 章节通用 ---------- */
.page-about .about-chapter {
  padding: var(--about-pad) 0;
}

.page-about .about-chapter--paper {
  background: var(--paper);
}

.page-about .about-chapter--cream {
  background: var(--cream);
}

.page-about .about-chapter--dark {
  background: var(--ink);
  color: var(--cream);
}

.page-about .about-chapter-grid {
  display: grid;
  gap: clamp(20px, 4vw, 34px);
}

.page-about .about-chapter-aside {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-about .about-num {
  font-size: clamp(56px, 9vw, 120px);
  font-weight: 900;
  line-height: 0.82;
  letter-spacing: -0.04em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.page-about .about-chapter--dark .about-num {
  color: var(--lime);
}

.page-about .about-chapter-kicker {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--ink-2);
}

.page-about .about-chapter--dark .about-chapter-kicker {
  color: var(--mist);
}

.page-about .about-chapter-title {
  margin: 0 0 18px;
  font-size: clamp(26px, 3.7vw, 46px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--brown);
}

.page-about .about-chapter--dark .about-chapter-title {
  color: var(--paper);
}

.page-about .about-chapter-lead {
  margin: 0 0 24px;
  max-width: 34em;
  font-size: clamp(17px, 1.8vw, 20px);
  line-height: 1.75;
  color: var(--brown);
}

.page-about .about-chapter--dark .about-chapter-lead {
  color: var(--mist);
}

.page-about .about-prose p {
  margin: 0 0 18px;
  max-width: 36em;
  font-size: 16.5px;
  line-height: 1.95;
}

.page-about .about-chapter--dark .about-prose p {
  color: var(--about-face);
}

.page-about .about-quote {
  margin: 28px 0 0;
  max-width: 22em;
  padding: 6px 0 6px 22px;
  border-left: 6px solid var(--lime);
  font-size: clamp(19px, 2.3vw, 27px);
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

.page-about .about-figure {
  margin: 0;
  border: 3px solid var(--ink-line);
  border-radius: var(--radius-card);
  background: var(--ink-2);
  overflow: hidden;
}

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

/* ---------- 年表 ---------- */
.page-about .about-band-figure {
  margin: 0 0 clamp(30px, 4vw, 46px);
  border: 3px solid var(--ink-line);
  border-radius: var(--radius-card);
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .about-band-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-about .about-timeline {
  position: relative;
  display: grid;
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-tl {
  position: relative;
  border-left: 3px solid var(--ink-line);
  padding: 2px 0 2px 18px;
  transition: border-color var(--dur) var(--ease);
}

.page-about .about-tl:hover {
  border-left-color: var(--lime);
}

.page-about .about-tl-year {
  display: block;
  font-size: 24px;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-about .about-tl .tag {
  display: inline-block;
  margin: 8px 0 10px;
}

.page-about .about-tl-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .about-team-layout {
  display: grid;
  gap: 28px;
}

.page-about .about-team-cols {
  display: grid;
  gap: 20px;
}

.page-about .about-team-col {
  border-top: 6px solid var(--ink);
  padding: 18px 0 6px;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-about .about-team-col:hover {
  transform: translateY(-4px);
  border-top-color: var(--orange);
}

.page-about .about-team-count {
  display: block;
  font-size: clamp(32px, 4.2vw, 48px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.page-about .about-team-name {
  margin: 10px 0 8px;
  font-size: 18px;
  font-weight: 900;
  color: var(--brown);
}

.page-about .about-team-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--brown);
}

.page-about .about-team-figure {
  max-width: 420px;
}

/* ---------- 更新节奏 ---------- */
.page-about .about-cadence {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 3px solid var(--ink-line);
}

.page-about .about-cadence li {
  display: grid;
  gap: 8px;
  padding: 22px 0;
  border-bottom: 1px solid var(--ink-line);
}

.page-about .about-cadence-term {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--ink-2);
}

.page-about .about-cadence-desc {
  margin: 0;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--brown);
}

.page-about .about-inline-link {
  margin: 26px 0 0;
  font-size: 15px;
  line-height: 1.8;
}

.page-about .about-inline-link a {
  color: var(--ink);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--lime);
  text-decoration-thickness: 3px;
  text-underline-offset: 4px;
}

/* ---------- 覆盖 ---------- */
.page-about .about-coverage-layout {
  display: grid;
  gap: 26px;
}

.page-about .about-coverage-body p {
  margin: 0 0 18px;
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--brown);
}

.page-about .about-dots {
  position: relative;
  height: 116px;
  margin: 22px 0 26px;
  border: 3px solid var(--ink-line);
  border-radius: var(--radius-card);
  background-color: var(--paper);
  background-image: radial-gradient(circle, var(--ink-line) 1.4px, transparent 1.6px);
  background-size: 17px 17px;
  background-position: 9px 9px;
}

.page-about .about-dots::before,
.page-about .about-dots::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.page-about .about-dots::before {
  left: 16%;
  top: 30%;
  background: var(--orange);
  box-shadow: 0 0 0 7px rgba(255, 122, 46, 0.18);
}

.page-about .about-dots::after {
  left: 63%;
  top: 58%;
  background: var(--lime);
  box-shadow: 0 0 0 7px rgba(200, 247, 81, 0.4);
}

.page-about .about-addr {
  margin: 0;
  display: grid;
  gap: 10px;
  font-size: 15px;
  line-height: 1.7;
}

.page-about .about-addr dt {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--ink-2);
}

.page-about .about-addr dd {
  margin: 0 0 6px;
  color: var(--brown);
  word-break: break-word;
}

/* ---------- 技术保障 ---------- */
.page-about .about-stats {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

.page-about .about-stat {
  border: 3px solid var(--ink-line);
  border-radius: var(--radius-card);
  background: var(--ink-2);
  padding: 20px;
}

.page-about .about-stat-num {
  display: block;
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 900;
  line-height: 1;
  color: var(--lime);
}

.page-about .about-stat-label {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 下一步 ---------- */
.page-about .about-next {
  padding: var(--about-pad) 0;
  background: var(--paper);
}

.page-about .about-next-inner {
  display: grid;
  gap: 22px;
  border: 3px solid var(--ink);
  border-radius: var(--radius-card);
  background: var(--cream);
  box-shadow: var(--shadow-hard);
  padding: clamp(26px, 4vw, 48px);
}

.page-about .about-next-title {
  margin: 0 0 10px;
  font-size: clamp(24px, 3.2vw, 36px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--brown);
}

.page-about .about-next-desc {
  margin: 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--brown);
}

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

/* ---------- 媒体查询 ---------- */
@media (min-width: 560px) {
  .page-about .about-addr {
    grid-template-columns: 5.5em minmax(0, 1fr);
    column-gap: 18px;
    align-items: baseline;
  }

  .page-about .about-addr dd {
    margin-bottom: 0;
  }
}

@media (min-width: 720px) {
  .page-about .about-team-cols {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

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

@media (min-width: 760px) {
  .page-about .about-cadence li {
    grid-template-columns: 16em minmax(0, 1fr);
    column-gap: 28px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-about .about-chapter-grid {
    grid-template-columns: 168px minmax(0, 1fr);
    column-gap: clamp(32px, 6vw, 88px);
    align-items: start;
  }

  .page-about .about-coverage-layout {
    grid-template-columns: minmax(0, 400px) minmax(0, 1fr);
    column-gap: clamp(32px, 5vw, 64px);
    align-items: start;
  }

  .page-about .about-timeline {
    grid-auto-flow: column;
    grid-auto-columns: minmax(0, 1fr);
    gap: clamp(14px, 2vw, 26px);
  }

  .page-about .about-timeline::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 8px;
    height: 3px;
    background: repeating-linear-gradient(to right, var(--ink-line) 0 10px, transparent 10px 20px);
  }

  .page-about .about-tl {
    border-left: 0;
    padding: 34px 0 0;
  }

  .page-about .about-tl::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--lime);
    transition: transform var(--dur) var(--ease);
  }

  .page-about .about-tl--version::before {
    background: var(--orange);
  }

  .page-about .about-tl:hover::before {
    transform: scale(1.35);
  }
}

@media (min-width: 960px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    column-gap: clamp(32px, 5vw, 72px);
    align-items: end;
  }

  .page-about .about-next-inner {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    column-gap: 40px;
  }

  .page-about .about-next-actions {
    justify-content: flex-end;
  }
}

@media (min-width: 1080px) {
  .page-about .about-team-layout {
    grid-template-columns: minmax(0, 1fr) 300px;
    column-gap: 44px;
    align-items: start;
  }

  .page-about .about-team-figure {
    max-width: none;
  }
}