.page-about {
  --about-rule: rgba(216, 228, 232, .18);
  --about-rule-soft: rgba(216, 228, 232, .10);
  --about-ink-rule: rgba(43, 31, 26, .16);
  background: var(--night);
  color: var(--white);
  overflow-x: clip;
}

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

.page-about .about-breadcrumb-wrap {
  padding-block: clamp(18px, 3vw, 28px) 0;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding-block: clamp(26px, 5vw, 54px) clamp(48px, 8vw, 96px);
  background:
    radial-gradient(110% 80% at 88% 0%, rgba(56, 242, 196, .14), rgba(56, 242, 196, 0) 58%),
    radial-gradient(70% 60% at 4% 96%, rgba(255, 138, 61, .10), rgba(255, 138, 61, 0) 62%);
}

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

.page-about .about-h1 {
  margin: 18px 0 20px;
  font-size: clamp(2.4rem, 8vw, 5.2rem);
  line-height: 1.04;
  letter-spacing: .015em;
  font-weight: 800;
  text-wrap: balance;
}

.page-about .about-hero-lead {
  max-width: 48ch;
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  line-height: 1.9;
  color: var(--mist);
}

.page-about .about-hero-aside {
  border-left: 2px solid var(--amber);
  padding-left: clamp(16px, 2.5vw, 24px);
}

.page-about .about-aside-index {
  margin-bottom: 14px;
  font-size: .78rem;
  letter-spacing: .18em;
  color: var(--amber);
}

.page-about .about-aside-text {
  font-size: .93rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-aside-text + .about-aside-text {
  margin-top: .9em;
}

.page-about .about-keywords {
  margin-top: clamp(34px, 6vw, 64px);
  padding-top: clamp(20px, 3vw, 28px);
  border-top: 1px solid var(--about-rule);
}

.page-about .about-seg {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 0;
  background: none;
  border: 0;
}

.page-about .about-seg .segment {
  padding: 10px 18px;
  font-family: var(--font-sans);
  font-size: .93rem;
  line-height: 1.3;
  color: var(--mist);
  background: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-pill);
  cursor: pointer;
  transition: color .18s var(--ease), border-color .18s var(--ease), background .18s var(--ease);
}

.page-about .about-seg .segment:hover {
  color: var(--white);
  border-color: var(--mint);
}

.page-about .about-seg .segment[aria-selected="true"] {
  color: var(--night);
  background: var(--mint);
  border-color: var(--mint);
  font-weight: 700;
}

.page-about .about-kw-panels {
  display: grid;
  gap: 16px;
  margin-top: 22px;
}

.page-about .about-kw-panel {
  padding-left: 16px;
  border-left: 2px solid var(--mint);
  max-width: 62ch;
  font-size: .97rem;
  line-height: 1.9;
  color: var(--mist);
}

.page-about .about-kw-panel:focus-visible,
.page-about .about-role-panel:focus-visible,
.page-about .about-stage-panel:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 4px;
}

/* ---------- 01 起点 ---------- */
.page-about .about-origin {
  padding-block: clamp(48px, 8vw, 100px);
  background: var(--cream);
  color: var(--ink);
}

.page-about .about-origin-grid {
  display: grid;
  gap: clamp(20px, 3vw, 32px);
}

.page-about .about-origin-side {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-about .about-side-tag {
  font-size: .78rem;
  letter-spacing: .2em;
  color: rgba(43, 31, 26, .55);
}

.page-about .about-origin .section-index {
  color: var(--mint-deep);
}

.page-about .about-origin .section-title {
  color: var(--ink);
  margin-bottom: clamp(18px, 3vw, 26px);
}

.page-about .about-origin-body p {
  max-width: 64ch;
  font-size: clamp(.98rem, 1.3vw, 1.05rem);
  line-height: 1.95;
  color: rgba(43, 31, 26, .82);
}

.page-about .about-origin-body p + p {
  margin-top: 1.1em;
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(28px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-ink-rule);
  border-top: 1px solid var(--about-ink-rule);
  border-bottom: 1px solid var(--about-ink-rule);
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 4px 20px 0;
  background: var(--cream);
}

.page-about .about-stat-num {
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  line-height: 1;
  color: var(--ink);
  letter-spacing: -.01em;
}

.page-about .about-stat-label {
  font-size: .86rem;
  line-height: 1.6;
  color: rgba(43, 31, 26, .66);
}

/* ---------- 02 编辑体系 ---------- */
.page-about .about-desk {
  padding-block: clamp(48px, 8vw, 104px);
}

.page-about .about-desk-head {
  max-width: 62ch;
  margin-bottom: clamp(28px, 4vw, 44px);
}

.page-about .about-desk .section-index {
  color: var(--mint);
  margin-bottom: 12px;
}

.page-about .about-desk .section-title {
  color: var(--white);
  margin-bottom: 14px;
}

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

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

.page-about .about-figure .media-frame {
  overflow: hidden;
  border: 1px solid var(--about-rule);
}

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

.page-about .about-figure .media-caption {
  margin-top: 10px;
  font-size: .74rem;
  letter-spacing: .08em;
  color: var(--mist);
  opacity: .8;
}

.page-about .about-figure--tail {
  margin-top: clamp(32px, 5vw, 56px);
}

.page-about .about-roles {
  margin-top: clamp(32px, 5vw, 56px);
}

.page-about .about-role-panels {
  display: grid;
  gap: 16px;
  margin-top: 22px;
}

.page-about .about-role-panel {
  position: relative;
  padding: clamp(18px, 2.6vw, 26px) clamp(18px, 2.6vw, 26px) clamp(18px, 2.6vw, 26px) 26px;
  background: var(--night-2);
  color: var(--mist);
  line-height: 1.9;
  font-size: .96rem;
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-about .about-role-panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--mint);
}

/* ---------- 03 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  padding-block: clamp(48px, 8vw, 104px);
  background: linear-gradient(180deg, var(--night) 0%, var(--night-2) 100%);
  overflow: hidden;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image: repeating-linear-gradient(118deg, rgba(56, 242, 196, .055) 0 1px, transparent 1px 28px);
}

.page-about .about-timeline .shell {
  position: relative;
}

.page-about .about-timeline .section-index {
  color: var(--amber);
  margin-bottom: 12px;
}

.page-about .about-timeline .section-title {
  color: var(--white);
  margin-bottom: 14px;
}

.page-about .about-timeline .lead {
  color: var(--mist);
  margin-bottom: clamp(26px, 4vw, 40px);
}

.page-about .about-track {
  display: flex;
  gap: 12px;
  padding: 0 0 6px;
  background: none;
  border: 0;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
}

.page-about .about-track .about-stage {
  flex: 0 0 auto;
  min-width: 158px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 18px 16px;
  text-align: left;
  background: rgba(14, 42, 74, .9);
  border: 1px solid var(--line);
  border-radius: 0;
  color: var(--mist);
  cursor: pointer;
  scroll-snap-align: start;
  clip-path: polygon(14px 0, 100% 0, 100% 100%, 0 100%, 0 14px);
  transition: background .2s var(--ease), border-color .2s var(--ease), color .2s var(--ease);
}

.page-about .about-track .about-stage:hover {
  border-color: var(--mint);
  color: var(--white);
}

.page-about .about-track .about-stage[aria-selected="true"] {
  background: rgba(56, 242, 196, .12);
  border-color: var(--mint);
  color: var(--white);
  box-shadow: inset 0 -3px 0 var(--mint);
}

.page-about .about-stage:focus-visible {
  outline: 2px solid var(--mint);
  outline-offset: 3px;
}

.page-about .about-stage-no {
  font-size: .72rem;
  letter-spacing: .16em;
  color: var(--mint);
}

.page-about .about-stage-name {
  font-size: .96rem;
  font-weight: 700;
  letter-spacing: .02em;
}

.page-about .about-stage-year {
  font-size: .8rem;
  color: rgba(216, 228, 232, .68);
}

.page-about .about-stage-panels {
  display: grid;
  gap: 20px;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-about .about-stage-big {
  font-size: clamp(2.6rem, 9vw, 5rem);
  line-height: .95;
  letter-spacing: -.02em;
  color: var(--mint);
  opacity: .9;
}

.page-about .about-stage-title {
  margin: 14px 0 12px;
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  line-height: 1.5;
  color: var(--white);
}

.page-about .about-stage-panel p:not(.about-stage-big) {
  max-width: 66ch;
  font-size: .97rem;
  line-height: 1.95;
  color: var(--mist);
}

/* ---------- 04 本地档案 ---------- */
.page-about .about-archive {
  padding-block: clamp(48px, 8vw, 104px);
  background: var(--cream);
  color: var(--ink);
}

.page-about .about-archive-grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-about .about-archive .about-figure .media-frame {
  border-color: var(--about-ink-rule);
}

.page-about .about-archive .media-caption {
  color: rgba(43, 31, 26, .62);
  opacity: 1;
}

.page-about .about-archive .section-index {
  color: var(--mint-deep);
  margin-bottom: 12px;
}

.page-about .about-archive .section-title {
  color: var(--ink);
  margin-bottom: clamp(16px, 3vw, 24px);
}

.page-about .about-archive-body p {
  max-width: 62ch;
  font-size: clamp(.98rem, 1.3vw, 1.05rem);
  line-height: 1.95;
  color: rgba(43, 31, 26, .82);
}

.page-about .about-archive-body p + p {
  margin-top: 1.1em;
}

.page-about .about-dims {
  list-style: none;
  margin: clamp(32px, 5vw, 52px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-dim {
  padding: 18px 18px 20px;
  background: rgba(43, 31, 26, .045);
  border-top: 2px solid var(--ink);
  clip-path: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 0 100%);
}

.page-about .about-dim-no {
  display: block;
  font-size: .72rem;
  letter-spacing: .18em;
  color: var(--mint-deep);
  margin-bottom: 8px;
}

.page-about .about-dim-title {
  font-size: 1.05rem;
  line-height: 1.4;
  margin-bottom: 8px;
  color: var(--ink);
}

.page-about .about-dim p {
  font-size: .88rem;
  line-height: 1.75;
  color: rgba(43, 31, 26, .7);
}

/* ---------- 05 运营支撑 ---------- */
.page-about .about-bench {
  padding-block: clamp(48px, 8vw, 104px);
  background: var(--night);
}

.page-about .about-bench .section-index {
  color: var(--amber);
  margin-bottom: 12px;
}

.page-about .about-bench .section-title {
  color: var(--white);
  margin-bottom: 16px;
}

.page-about .about-bench .lead {
  color: var(--mist);
  max-width: 64ch;
}

.page-about .about-bench-text {
  max-width: 64ch;
  margin-top: 1em;
  font-size: .98rem;
  line-height: 1.9;
  color: var(--mist);
}

.page-about .about-bench-grid {
  list-style: none;
  margin: clamp(30px, 5vw, 48px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-rule);
  border: 1px solid var(--about-rule);
}

.page-about .about-bench-cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(18px, 2.6vw, 26px);
  background: var(--night-2);
}

.page-about .about-bench-num {
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  line-height: 1;
  color: var(--mint);
  letter-spacing: -.01em;
}

.page-about .about-bench-label {
  font-size: .86rem;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 06 联络 ---------- */
.page-about .about-contact {
  padding-block: clamp(36px, 6vw, 72px) clamp(56px, 9vw, 112px);
  background: var(--night);
}

.page-about .about-contact-card {
  --cut: clamp(14px, 3vw, 32px);
  padding: clamp(26px, 4.4vw, 56px);
  background: var(--cream);
  color: var(--ink);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, var(--cut) 100%, 0 calc(100% - var(--cut)));
}

.page-about .about-contact-card .section-index {
  color: var(--mint-deep);
  margin-bottom: 12px;
}

.page-about .about-contact-card .section-title {
  color: var(--ink);
  margin-bottom: 16px;
}

.page-about .about-contact-card p {
  max-width: 64ch;
  font-size: .98rem;
  line-height: 1.9;
  color: rgba(43, 31, 26, .82);
}

.page-about .about-contact-line {
  margin-top: 1.2em;
  font-size: .9rem;
  letter-spacing: .02em;
  color: var(--ink);
  word-break: break-word;
}

.page-about .about-contact-note {
  margin-top: .9em;
  font-size: .9rem;
  color: rgba(43, 31, 26, .68);
}

.page-about .about-contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3.5vw, 32px);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-stat {
    padding-inline: 20px;
  }

  .page-about .about-stat:first-child {
    padding-left: 0;
  }

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

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

@media (min-width: 900px) {
  .page-about .about-hero-top {
    grid-template-columns: minmax(0, 7.4fr) minmax(0, 3.6fr);
    align-items: end;
    gap: clamp(32px, 4vw, 64px);
  }

  .page-about .about-hero-aside {
    padding-bottom: 8px;
  }

  .page-about .about-origin-grid {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    gap: clamp(28px, 4vw, 64px);
  }

  .page-about .about-origin-side {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding-top: 6px;
  }

  .page-about .about-desk-body,
  .page-about .about-archive-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    gap: clamp(32px, 4vw, 56px);
    align-items: center;
  }

  .page-about .about-desk-body {
    display: grid;
  }

  .page-about .about-archive-grid {
    display: grid;
  }

  .page-about .about-stage-panels {
    grid-template-columns: minmax(0, 1fr);
    max-width: 78ch;
  }

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

@media (min-width: 1180px) {
  .page-about .about-dims {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-seg .segment,
  .page-about .about-track .about-stage {
    transition: none;
  }
}