.page-about {
  --about-paper-ink: #201d19;
  background: var(--color-bg);
  color: var(--color-text);
  overflow: clip;
}

.page-about .about-wrap {
  width: min(100% - 2rem, 1240px);
  margin-inline: auto;
}

.page-about section {
  padding: 72px 0;
  position: relative;
}

.page-about .section-head {
  margin-bottom: 32px;
}

.page-about .section-label {
  display: block;
  margin-bottom: 8px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-display);
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.01em;
}

.page-about p {
  line-height: 1.75;
}

/* 品牌叙事 */
.page-about .about-hero {
  padding-top: 2rem;
  background:
    radial-gradient(ellipse at 82% 12%, rgba(0, 180, 216, 0.18), transparent 46%),
    linear-gradient(162deg, #0a0d11 0%, #0e1116 62%, #12161d 100%);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: 26%;
  right: -8%;
  width: 190px;
  height: 420px;
  background: linear-gradient(135deg, var(--color-red), transparent 76%);
  opacity: 0.08;
  transform: rotate(14deg);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--color-red) 0%, var(--color-blue) 55%, transparent 100%);
}

.page-about .about-hero-inner {
  display: grid;
  gap: 40px;
  align-items: center;
}

.page-about .about-hero-copy {
  max-width: 560px;
}

.page-about .about-hero-copy .breadcrumb {
  margin-bottom: 20px;
}

.page-about .about-hero h1 {
  margin: 8px 0 18px;
  font-size: clamp(2rem, 5.2vw, 3.6rem);
  line-height: 1.05;
}

.page-about .about-lead {
  font-size: 1.05rem;
  color: var(--color-text-muted);
  margin-bottom: 24px;
  max-width: 52ch;
}

.page-about .about-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
}

.page-about a.tag {
  text-decoration: none;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.page-about a.tag:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.35);
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.page-about .about-stat {
  border-left: 2px solid var(--color-blue);
  padding-left: 12px;
}

.page-about .about-stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--color-text);
  line-height: 1.1;
}

.page-about .about-stat-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

/* 档案夹组件 */
.page-about .about-hero-visual {
  position: relative;
}

.page-about .about-folder {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.42), transparent 34%),
    var(--color-bg-paper);
  border-radius: 18px 18px 18px 5px;
  box-shadow:
    0 24px 50px var(--color-shadow),
    inset 0 -18px 30px rgba(0, 0, 0, 0.09);
  padding: 16px;
  display: block;
  position: relative;
  margin-left: 12px;
}

.page-about .about-folder::before {
  content: "";
  position: absolute;
  top: 16px;
  right: -14px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(230, 57, 70, 0.14);
  filter: blur(2px);
}

.page-about .about-folder-side {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.page-about .about-folder-tab {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(14, 17, 22, 0.08);
  border-radius: 8px;
  padding: 8px 10px;
  color: var(--about-paper-ink);
  text-decoration: none;
  transition: background 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-folder-tab:hover,
.page-about .about-folder-tab:focus-visible {
  background: rgba(230, 57, 70, 0.16);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.12);
}

.page-about .about-folder-code {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.page-about .about-folder-desc {
  display: block;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.28s ease, opacity 0.28s ease, margin-left 0.28s ease;
  font-size: 0.72rem;
  color: rgba(32, 29, 25, 0.72);
  white-space: nowrap;
}

.page-about .about-folder-tab:hover .about-folder-desc,
.page-about .about-folder-tab:focus-visible .about-folder-desc {
  max-height: 48px;
  margin-left: 4px;
  opacity: 1;
}

.page-about .about-folder-body {
  background: rgba(32, 29, 25, 0.07);
  border-radius: 12px;
  padding: 12px;
}

.page-about .about-folder-media img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 10px;
  border: 1px solid rgba(32, 29, 25, 0.16);
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.2);
}

.page-about .about-folder-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
  padding-top: 12px;
  color: var(--about-paper-ink);
}

.page-about .about-folder-meta .about-folder-code {
  font-size: 0.8rem;
  color: var(--color-red);
}

.page-about .about-folder-note {
  font-size: 0.7rem;
  color: rgba(32, 29, 25, 0.62);
  text-align: right;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 运营与资质 */
.page-about .about-ops {
  background:
    linear-gradient(180deg, #0a0d11, #0e1116),
    var(--color-bg);
}

.page-about .about-ops::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, transparent, var(--color-blue), transparent);
  opacity: 0.55;
}

.page-about .about-ops-grid {
  display: grid;
  gap: 32px;
  align-items: start;
}

.page-about .about-ops-main {
  display: grid;
  gap: 20px;
}

.page-about .about-license-card,
.page-about .about-claim-card {
  background: #11151b;
  border: 1px solid var(--color-line);
  border-left: 3px solid currentColor;
  border-radius: 14px 14px 14px 4px;
  padding: 18px 20px;
}

.page-about .about-license-card {
  border-left-color: var(--color-green);
}

.page-about .about-claim-card {
  border-left-color: var(--color-amber);
}

.page-about .about-license-card p,
.page-about .about-claim-card p {
  margin: 12px 0 0;
  color: var(--color-text-muted);
}

.page-about .about-license-card strong,
.page-about .about-claim-card strong {
  color: var(--color-text);
  font-weight: 600;
}

.page-about .about-ops-text {
  color: var(--color-text-muted);
  max-width: 60ch;
}

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

.page-about .about-ops-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 18px;
  border: 1px solid var(--color-line);
  box-shadow: 0 18px 40px var(--color-shadow);
}

/* 内容规整机制 */
.page-about .about-mech {
  background: linear-gradient(180deg, #0e1116 0%, #111821 100%);
}

.page-about .about-mech::before {
  content: "";
  position: absolute;
  top: -12px;
  left: 50%;
  width: 118%;
  height: 96px;
  background: var(--color-bg-paper);
  opacity: 0.045;
  transform: translateX(-50%) rotate(-1.8deg);
  transform-origin: center top;
  pointer-events: none;
}

.page-about .about-mech-grid {
  display: grid;
  gap: 28px;
  align-items: stretch;
}

.page-about .about-batch-block {
  background: var(--color-bg-paper);
  color: var(--about-paper-ink);
  border-radius: 18px 18px 18px 5px;
  padding: 24px;
  box-shadow: 0 22px 44px var(--color-shadow);
  position: relative;
  overflow: hidden;
}

.page-about .about-batch-block::after {
  content: "593";
  position: absolute;
  right: -8px;
  bottom: -30px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 7rem;
  color: rgba(32, 29, 25, 0.07);
  line-height: 1;
}

.page-about .about-batch-lead {
  font-size: 1.05rem;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.page-about .about-batch-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
  position: relative;
  z-index: 1;
}

.page-about .about-batch-list li {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: baseline;
  font-size: 0.94rem;
}

.page-about .about-batch-key {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: rgba(230, 57, 70, 0.12);
  border-radius: 18px;
  padding: 3px 10px;
  color: var(--color-red);
}

.page-about .about-batch-note {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid rgba(32, 29, 25, 0.14);
  font-size: 0.85rem;
  position: relative;
  z-index: 1;
}

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

.page-about .about-mech-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 16px;
  border: 1px solid var(--color-line);
  box-shadow: 0 18px 36px var(--color-shadow);
}

.page-about .about-rhythm {
  margin-top: 48px;
  background: rgba(13, 16, 20, 0.7);
  border: 1px solid var(--color-line);
  border-radius: 18px;
  padding: 22px;
}

.page-about .about-rhythm-head .section-label {
  color: var(--color-blue);
  margin-bottom: 4px;
}

.page-about .about-rhythm-head p {
  color: var(--color-text-muted);
  max-width: 60ch;
  margin: 4px 0 18px;
}

.page-about .about-yearbar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.page-about .about-yearbar a {
  display: inline-block;
  border: 1px solid var(--color-line);
  border-radius: 30px;
  padding: 6px 14px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--color-text-muted);
  text-decoration: none;
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.page-about .about-yearbar a:hover,
.page-about .about-yearbar a:focus-visible {
  border-color: var(--color-blue);
  color: var(--color-text);
  transform: translateY(-2px);
}

.page-about .about-year-rows {
  display: grid;
  gap: 8px;
}

.page-about .about-year-row {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: baseline;
  padding: 10px 4px;
  border-bottom: 1px dashed var(--color-line);
}

.page-about .about-year-row:last-child {
  border-bottom: none;
}

.page-about .about-year {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
  color: var(--color-text);
}

.page-about .about-year-detail {
  color: var(--color-text-muted);
  font-size: 0.9rem;
}

/* 团队与生态 */
.page-about .about-team {
  background: #0a0d11;
}

.page-about .about-team::before {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 160px;
  height: 160px;
  background: radial-gradient(circle, rgba(230, 57, 70, 0.14), transparent 70%);
}

.page-about .about-team-grid {
  display: grid;
  gap: 16px;
}

.page-about .about-role {
  position: relative;
  background: #11151b;
  border: 1px solid var(--color-line);
  border-top: 2px solid var(--color-blue);
  border-radius: 16px 16px 16px 4px;
  padding: 24px;
  transition: border-color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
}

.page-about .about-role:hover {
  transform: translateY(-4px);
  border-color: var(--color-blue);
  box-shadow: 0 14px 30px var(--color-shadow);
}

.page-about .about-role-index {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-red);
  letter-spacing: 0.1em;
}

.page-about .about-role h3 {
  margin: 10px 0 8px;
  font-size: 1.2rem;
  color: var(--color-text);
}

.page-about .about-role p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

.page-about .about-eco {
  margin-top: 32px;
  padding: 24px;
  border-left: 3px solid var(--color-amber);
  border-radius: 12px;
  background: rgba(244, 162, 97, 0.06);
}

.page-about .about-eco p {
  max-width: 68ch;
  color: var(--color-text-muted);
}

.page-about .about-eco a {
  color: var(--color-blue);
}

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

/* 桌面端 */
@media (min-width: 960px) {
  .page-about section {
    padding: 96px 0;
  }

  .page-about .about-wrap {
    width: min(100% - 3rem, 1280px);
  }

  .page-about .about-hero-inner {
    grid-template-columns: 1fr 400px;
    gap: 56px;
  }

  .page-about .about-folder {
    display: grid;
    grid-template-columns: 76px 1fr;
    gap: 16px;
    padding: 20px;
    margin-left: 0;
  }

  .page-about .about-folder-side {
    flex-direction: column;
    gap: 10px;
    margin-bottom: 0;
  }

  .page-about .about-folder-tab {
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 10px;
  }

  .page-about .about-folder-tab .about-folder-code {
    font-size: 0.9rem;
  }

  .page-about .about-folder-tab:hover .about-folder-desc,
  .page-about .about-folder-tab:focus-visible .about-folder-desc {
    margin-left: 0;
  }

  .page-about .about-ops-grid {
    grid-template-columns: 1.2fr 0.8fr;
  }

  .page-about .about-mech-grid {
    grid-template-columns: 1fr 1.1fr;
  }

  .page-about .about-rhythm {
    padding: 32px;
  }

  .page-about .about-team-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }
}