.page-about {
  --about-gap: clamp(28px, 5vw, 64px);
  --about-panel-line: rgba(31, 224, 200, .16);
  padding-bottom: clamp(40px, 7vw, 96px);
  background:
    radial-gradient(1200px 520px at 82% -8%, rgba(31, 224, 200, .10), transparent 62%),
    radial-gradient(900px 460px at -6% 28%, rgba(43, 111, 122, .22), transparent 60%);
}

.page-about .about-crumb {
  padding-top: clamp(20px, 4vw, 34px);
  padding-bottom: 6px;
}

.page-about .breadcrumbs__item + .breadcrumbs__item::before {
  content: "/";
  margin-right: .55em;
  color: var(--grid);
}

/* ---------- 首屏拼贴 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  padding-top: clamp(18px, 3vw, 30px);
  align-items: start;
}

.page-about .about-h1 {
  font-size: clamp(34px, 8.2vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 800;
  margin: 10px 0 18px;
  color: var(--paper);
}

.page-about .hero-copy .lede {
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
  max-width: 38em;
  margin: 0 0 24px;
}

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

.page-about .hero-collage {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .hero-figure {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--about-panel-line);
  box-shadow: var(--shadow-panel);
  position: relative;
  background: var(--deep-2);
}

.page-about .hero-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(43, 111, 122, .35) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(43, 111, 122, .35) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: .35;
  pointer-events: none;
}

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

.page-about .hero-stat {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 18px 22px;
  border: 1px solid var(--about-panel-line);
  background: linear-gradient(150deg, rgba(14, 42, 71, .92), rgba(7, 26, 47, .92));
}

.page-about .stat-num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 5.4vw, 40px);
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.02em;
  line-height: 1;
}

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

.page-about .hero-note {
  padding: 18px 22px 18px 16px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: center;
  border: 1px solid var(--about-panel-line);
  background: rgba(14, 42, 71, .68);
}

.page-about .note-rotated {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  transform: rotate(180deg);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--cyan-soft);
}

.page-about .hero-note p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 通用章节头 ---------- */
.page-about .about-band,
.page-about .about-team {
  margin-top: var(--about-gap);
}

.page-about .band-head {
  max-width: 44em;
  margin-bottom: 22px;
}

.page-about .band-title {
  font-size: clamp(24px, 4.6vw, 40px);
  line-height: 1.18;
  letter-spacing: -0.015em;
  font-weight: 800;
  color: var(--paper);
  margin: 8px 0 12px;
}

.page-about .band-lede {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
  max-width: 40em;
}

/* ---------- 年份跳转 ---------- */
.page-about .year-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 26px;
}

.page-about .year-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 7px;
  padding: 9px 16px;
  border-radius: var(--r-pill);
  border: 1px solid var(--about-panel-line);
  background: rgba(14, 42, 71, .7);
  color: var(--mist);
  text-decoration: none;
  font-size: 12.5px;
  letter-spacing: .04em;
  transition: border-color .25s ease, color .25s ease, background-color .25s ease;
}

.page-about .year-chip .num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--cyan);
}

.page-about .year-chip:hover,
.page-about .year-chip:focus-visible {
  border-color: var(--cyan);
  color: var(--paper);
  background: rgba(31, 224, 200, .12);
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  position: relative;
  display: grid;
  gap: 18px;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(to bottom, var(--cyan) 0%, rgba(43, 111, 122, .6) 55%, rgba(31, 224, 200, .05) 100%);
}

.page-about .tl-item {
  display: grid;
  grid-template-columns: 24px 1fr;
  gap: 14px;
  align-items: start;
  scroll-margin-top: 110px;
}

.page-about .tl-rail {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding-top: 22px;
  gap: 8px;
}

.page-about .tl-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--deep);
  border: 2px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(31, 224, 200, .14);
}

.page-about .tl-year {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cyan);
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}

.page-about .tl-panel {
  padding: var(--pad-panel);
  border: 1px solid var(--about-panel-line);
  background: linear-gradient(160deg, rgba(14, 42, 71, .86), rgba(7, 26, 47, .92));
  box-shadow: var(--shadow-panel);
}

.page-about .tl-panel h3 {
  margin: 0 0 10px;
  font-size: clamp(17px, 3vw, 22px);
  line-height: 1.35;
  color: var(--paper);
  font-weight: 700;
}

.page-about .tl-panel p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .tl-tagline {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 !important;
}

.page-about .tl-panel--warm {
  border-color: rgba(245, 197, 66, .34);
  background: linear-gradient(160deg, rgba(245, 197, 66, .10), rgba(7, 26, 47, .94) 62%);
}

.page-about .tl-panel--key {
  border-color: rgba(31, 224, 200, .42);
  background: linear-gradient(160deg, rgba(31, 224, 200, .13), rgba(7, 26, 47, .94) 66%);
}

/* ---------- 服务理念 ---------- */
.page-about .about-idea {
  margin-top: var(--about-gap);
  display: grid;
  gap: 18px;
}

.page-about .idea-aside {
  display: flex;
  align-items: center;
  gap: 14px;
}

.page-about .aside-rotated {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .22em;
  color: var(--grid);
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}

.page-about .about-idea .eyebrow {
  margin: 0;
}

.page-about .idea-body .lede {
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
  margin: 0 0 22px;
  max-width: 40em;
}

.page-about .idea-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-about .idea-card {
  padding: 22px;
  border: 1px solid var(--about-panel-line);
  background: rgba(14, 42, 71, .6);
  position: relative;
  transition: transform .3s ease, border-color .3s ease;
}

.page-about .idea-card:hover {
  transform: translateY(-3px);
  border-color: rgba(31, 224, 200, .38);
}

.page-about .idea-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--coral);
  margin-bottom: 10px;
}

.page-about .idea-card h3 {
  margin: 0 0 8px;
  font-size: 16px;
  line-height: 1.4;
  color: var(--paper);
  font-weight: 700;
}

.page-about .idea-card p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 团队 ---------- */
.page-about .team-layout {
  display: grid;
  gap: 20px;
}

.page-about .team-figure {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--about-panel-line);
  background: var(--deep-2);
  position: relative;
}

.page-about .team-figure figcaption {
  position: absolute;
  left: 16px;
  bottom: 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--cyan-soft);
  background: rgba(3, 16, 28, .72);
  padding: 6px 12px;
  border-radius: var(--r-pill);
  border: 1px solid rgba(31, 224, 200, .25);
}

.page-about .team-facts {
  display: grid;
  gap: 12px;
}

.page-about .fact-row {
  display: grid;
  grid-template-columns: 78px 1fr;
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  border-radius: var(--r-md);
  border: 1px solid var(--about-panel-line);
  background: rgba(14, 42, 71, .55);
}

.page-about .fact-num {
  font-family: var(--font-mono);
  font-size: clamp(22px, 4.4vw, 30px);
  font-weight: 700;
  color: var(--cyan);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.page-about .fact-row h3 {
  margin: 0 0 6px;
  font-size: 15px;
  line-height: 1.4;
  color: var(--paper);
  font-weight: 700;
}

.page-about .fact-row p {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 版本演进 ---------- */
.page-about .about-version {
  margin-top: var(--about-gap);
}

.page-about .version-stack {
  display: grid;
  gap: 14px;
}

.page-about .version-lead {
  padding: var(--pad-panel);
  border: 1px solid rgba(31, 224, 200, .3);
  background:
    radial-gradient(520px 260px at 100% 0%, rgba(31, 224, 200, .18), transparent 70%),
    linear-gradient(155deg, rgba(14, 42, 71, .95), rgba(7, 26, 47, .96));
  box-shadow: var(--shadow-panel);
}

.page-about .version-lead p {
  margin: 0 0 18px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
  max-width: 34em;
}

.page-about .version-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .version-card {
  padding: 20px;
  border: 1px solid var(--about-panel-line);
  background: rgba(14, 42, 71, .58);
}

.page-about .version-card h3 {
  margin: 0 0 8px;
  font-size: 15.5px;
  line-height: 1.42;
  color: var(--paper);
  font-weight: 700;
}

.page-about .version-card p {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .version-card--warm {
  border-color: rgba(255, 107, 74, .34);
  background: linear-gradient(158deg, rgba(255, 107, 74, .10), rgba(14, 42, 71, .7) 70%);
}

/* ---------- 海南 ---------- */
.page-about .about-hainan {
  margin-top: var(--about-gap);
}

.page-about .hainan-layout {
  display: grid;
  gap: 20px;
  align-items: center;
  padding: clamp(18px, 3vw, 28px);
  border-radius: var(--r-lg);
  border: 1px solid var(--about-panel-line);
  background: linear-gradient(150deg, rgba(14, 42, 71, .82), rgba(7, 26, 47, .94));
}

.page-about .hainan-figure {
  margin: 0;
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--about-panel-line);
}

.page-about .hainan-copy p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .hainan-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

/* ---------- 收尾 ---------- */
.page-about .about-close {
  margin-top: var(--about-gap);
}

.page-about .close-panel {
  padding: var(--pad-panel);
  border: 1px solid rgba(31, 224, 200, .3);
  background:
    radial-gradient(600px 300px at 0% 100%, rgba(255, 107, 74, .14), transparent 70%),
    linear-gradient(160deg, rgba(14, 42, 71, .92), rgba(7, 26, 47, .96));
  box-shadow: var(--shadow-panel);
  display: grid;
  gap: 20px;
}

.page-about .close-copy p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist);
  max-width: 38em;
}

.page-about .close-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

.page-about .about-close .band-title {
  margin-bottom: 12px;
}

/* ---------- 平板 ---------- */
@media (min-width: 640px) {
  .page-about .idea-grid,
  .page-about .version-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-about .hero-collage {
    grid-template-columns: 1.25fr 1fr;
    align-items: stretch;
  }

  .page-about .hero-figure {
    grid-column: 1 / -1;
  }

  .page-about .tl-item {
    grid-template-columns: 64px 1fr;
    gap: 18px;
  }

  .page-about .timeline::before {
    left: 31px;
  }

  .page-about .tl-year {
    writing-mode: horizontal-tb;
    transform: none;
    font-size: 14px;
  }

  .page-about .tl-rail {
    padding-top: 24px;
  }

  .page-about .fact-row {
    grid-template-columns: 92px 1fr;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-about .about-hero {
    grid-template-columns: 1.05fr .95fr;
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .hero-collage {
    grid-template-columns: 1fr;
  }

  .page-about .hero-figure {
    grid-column: auto;
  }

  .page-about .about-hero {
    align-items: center;
  }

  .page-about .about-idea {
    grid-template-columns: 100px minmax(0, 1fr);
    gap: 28px;
  }

  .page-about .idea-aside {
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    padding-top: 8px;
  }

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

  .page-about .timeline {
    gap: 22px;
  }

  .page-about .tl-item {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 26px;
  }

  .page-about .timeline::before {
    left: 59px;
  }

  .page-about .tl-rail {
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    gap: 12px;
    padding-top: 26px;
  }

  .page-about .tl-year {
    font-size: 18px;
    font-weight: 700;
    color: var(--cyan-soft);
  }

  .page-about .tl-panel {
    max-width: 46em;
  }

  .page-about .tl-item:nth-child(even) .tl-panel {
    margin-left: clamp(0px, 3vw, 44px);
  }

  .page-about .team-layout {
    grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
    gap: 28px;
    align-items: start;
  }

  .page-about .team-figure {
    position: sticky;
    top: 110px;
  }

  .page-about .version-stack {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    gap: 18px;
    align-items: stretch;
  }

  .page-about .version-lead {
    display: flex;
    flex-direction: column;
    justify-content: center;
  }

  .page-about .hainan-layout {
    grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
    gap: 28px;
  }

  .page-about .close-panel {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, .6fr);
    align-items: center;
    gap: 28px;
  }

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

@media (min-width: 1200px) {
  .page-about .idea-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .idea-card,
  .page-about .year-chip {
    transition: none;
  }

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