.page-about {
  --about-paper-line: rgba(18, 32, 28, 0.14);
  --about-paper-soft: rgba(18, 32, 28, 0.68);
  --about-paper-fill: #EDE6DA;
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumbs {
  padding-top: clamp(18px, 3vw, 32px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-block: clamp(24px, 3.5vw, 44px) clamp(52px, 8vw, 108px);
}

.page-about .about-hero__inner {
  display: grid;
  gap: clamp(32px, 5vw, 56px);
  align-items: center;
}

.page-about .about-hero__title {
  margin: 10px 0 18px;
  max-width: 16ch;
  text-wrap: balance;
}

.page-about .about-hero__lead {
  max-width: 46ch;
  color: var(--mist);
}

.page-about .about-hero__figure {
  position: relative;
  padding: clamp(16px, 3vw, 28px);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 78% 22%, rgba(61, 242, 196, 0.08), transparent 62%),
    var(--ink-2);
}

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

.page-about .about-hero__figure-note {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 14px 0 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

.page-about .about-hero__figure-note .num {
  color: var(--gold);
  font-size: 15px;
}

/* ---------- 首屏数据条 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(28px, 4vw, 40px) 0 0;
  background: var(--line-soft);
  border-block: 1px solid var(--line-dark);
}

.page-about .about-stat {
  padding: 14px 16px;
  background: var(--ink);
}

.page-about .about-stat dt {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-about .about-stat dd {
  margin: 6px 0 0;
  font-family: var(--ff-mono);
  font-size: 17px;
  color: var(--paper);
}

.page-about .about-stat dd .num {
  font-size: 22px;
  font-weight: 700;
  color: var(--cyan);
}

/* ---------- 章节头 ---------- */
.page-about .about-section-head {
  max-width: 62ch;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-section-head .h-section {
  margin: 10px 0 14px;
}

.page-about .about-section-head__note {
  margin: 0;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.85;
}

.page-about .about-section-head--paper .about-section-head__note {
  color: var(--about-paper-soft);
}

/* ---------- 通用横幅 ---------- */
.page-about .about-banner {
  margin: 0 0 clamp(28px, 4vw, 44px);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
}

.page-about .about-banner--paper {
  border-color: var(--about-paper-line);
  background: var(--about-paper-fill);
}

.page-about .about-banner img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 6;
}

.page-about .about-banner--paper img {
  aspect-ratio: 14 / 9;
}

.page-about .about-banner__caption {
  padding: 10px 14px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
  border-top: 1px solid var(--line-dark);
}

.page-about .about-banner--paper .about-banner__caption {
  color: var(--about-paper-soft);
  border-top-color: var(--about-paper-line);
}

/* ---------- 时间线 ---------- */
.page-about .tl-list {
  list-style: none;
  margin: 0;
  padding: 0 0 0 30px;
  position: relative;
}

.page-about .tl-list::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(to bottom, var(--line-cyan), var(--line-dark) 62%, transparent);
}

.page-about .tl-item + .tl-item {
  margin-top: 2px;
}

.page-about .tl__summary {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 12px 0;
  list-style: none;
  cursor: pointer;
}

.page-about .tl__summary::-webkit-details-marker {
  display: none;
}

.page-about .tl__summary::before {
  content: "";
  position: absolute;
  left: -25px;
  top: 0.72em;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--gold);
  transition: background 0.2s var(--ease);
}

.page-about .tl[open] .tl__summary::before {
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-about .tl__summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--ff-mono);
  font-size: 14px;
  color: var(--cyan);
}

.page-about .tl[open] .tl__summary::after {
  content: "－";
}

.page-about .tl__year {
  font-size: 14px;
  color: var(--gold);
  letter-spacing: 0.04em;
}

.page-about .tl__title {
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: clamp(1.05rem, 2vw, 1.35rem);
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .tl__body {
  padding: 2px 0 20px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .tl__body p {
  max-width: 64ch;
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .tl__body a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
}

/* ---------- 团队 ---------- */
.page-about .section--paper {
  background: var(--paper);
  color: var(--paper-ink);
}

.page-about .about-team .eyebrow {
  color: var(--teal);
}

.page-about .team-bands {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--about-paper-line);
  border: 1px solid var(--about-paper-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .team-band {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(16px, 2.2vw, 24px);
  background: var(--paper);
  border-top: 2px solid var(--teal);
  transition: background 0.2s var(--ease), transform 0.2s var(--ease);
}

@media (hover: hover) {
  .page-about .team-band:hover {
    background: var(--about-paper-fill);
    transform: translateY(-2px);
  }
}

.page-about .team-band__role {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--about-paper-soft);
}

.page-about .team-band__num {
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  font-weight: 700;
  line-height: 1;
  color: var(--teal);
}

.page-about .team-band__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--about-paper-soft);
}

/* ---------- 覆盖范围 ---------- */
.page-about .cover-grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: center;
}

.page-about .about-p {
  margin: 0 0 16px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-p .num {
  color: var(--cyan);
  font-weight: 600;
}

.page-about .about-p--paper {
  color: var(--about-paper-soft);
}

.page-about .about-p--paper .num {
  color: var(--teal);
}

.page-about .cover-legend {
  list-style: none;
  margin: 22px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--line-dark);
  display: grid;
  gap: 10px;
}

.page-about .cover-legend li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-about .cover-legend .num {
  color: var(--gold);
}

.page-about .cover-legend__dot {
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(143, 179, 167, 0.42);
  transform: translateY(-1px);
}

.page-about .cover-legend__dot--major {
  background: var(--cyan);
}

.page-about .cover-legend__dot--soft {
  background: transparent;
  border: 1px solid var(--line-dark);
}

.page-about .cover-figure {
  padding: clamp(18px, 3vw, 30px);
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: var(--ink-2);
}

.page-about .cover-dots {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .cover-figure__note {
  margin: 14px 0 0;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* ---------- 发布流程 ---------- */
.page-about .review-split {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: start;
}

.page-about .about-review .eyebrow {
  color: var(--teal);
}

.page-about .review-steps {
  list-style: none;
  margin: clamp(24px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-paper-line);
  border: 1px solid var(--about-paper-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-about .review-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 16px 18px;
  background: var(--paper);
}

.page-about .review-step__idx {
  font-size: 13px;
  font-weight: 700;
  color: var(--teal);
  padding-top: 2px;
}

.page-about .review-step__title {
  margin: 0 0 4px;
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: 1.02rem;
  letter-spacing: -0.01em;
  color: var(--paper-ink);
}

.page-about .review-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--about-paper-soft);
}

.page-about .review-step a {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid rgba(14, 107, 88, 0.42);
}

.page-about .review-figure {
  margin: 0;
  border: 1px solid var(--about-paper-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--about-paper-fill);
}

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

.page-about .review-figure__caption {
  padding: 10px 14px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--about-paper-soft);
  border-top: 1px solid var(--about-paper-line);
}

/* ---------- 原则 ---------- */
.page-about .about-principles {
  padding-bottom: clamp(56px, 8vw, 104px);
}

.page-about .principles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border-block: 1px solid var(--line-dark);
}

.page-about .principle {
  padding: clamp(18px, 2.6vw, 26px) clamp(16px, 2.4vw, 24px);
  background: var(--ink);
  border-top: 2px solid var(--line-cyan);
}

.page-about .principle__idx {
  display: block;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-about .principle__title {
  margin: 10px 0 8px;
  font-family: var(--ff-display);
  font-weight: 700;
  font-size: clamp(1.1rem, 2vw, 1.3rem);
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-about .principle__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 收尾 CTA ---------- */
.page-about .about-cta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
  margin-top: clamp(28px, 4vw, 44px);
  padding-top: clamp(24px, 3vw, 32px);
  border-top: 1px solid var(--line-dark);
}

.page-about .about-cta__text {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-about .about-cta__text a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--line-cyan);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 780px) {
  .page-about .team-bands {
    grid-template-columns: 6fr 4fr 3fr 2.2fr 3.4fr;
  }

  .page-about .about-cta {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

  .page-about .cover-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-about .review-split {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }
}

@media (min-width: 1080px) {
  .page-about .principles {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .team-band,
  .page-about .tl__summary::before {
    transition: none;
  }

  .page-about .team-band:hover {
    transform: none;
  }
}