.page-about {
  --about-line: 1px solid rgba(201, 162, 39, 0.26);
  background: var(--blanc-chaud);
  color: var(--encre);
  padding-bottom: 72px;
  overflow-x: hidden;
}

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

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

/* 首屏 */
.page-about .about-hero {
  padding: 28px 0 40px;
}

.page-about .eyebrow {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.2em;
  color: var(--or);
  text-transform: uppercase;
  margin: 0 0 18px;
}

.page-about h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2.1rem, 6vw, 4.4rem);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--encre);
  margin: 0 0 22px;
  max-width: 16ch;
}

.page-about .lede {
  font-size: var(--fs-16);
  line-height: 1.9;
  color: var(--gris);
  max-width: 62ch;
  margin: 0;
}

.page-about .hero-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin: 32px 0 0;
  padding: 22px 0 0;
  border-top: var(--about-line);
}

.page-about .hero-stats div {
  min-width: 0;
}

.page-about .hero-stats dt {
  font-size: var(--fs-12);
  letter-spacing: 0.12em;
  color: var(--gris);
  margin-bottom: 8px;
}

.page-about .hero-stats dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-32);
  line-height: 1;
  color: var(--pourpre-deep);
  letter-spacing: 0.02em;
}

/* 章节索引 */
.page-about .chapter-index {
  margin-top: 34px;
  padding-top: 22px;
  border-top: var(--about-line);
}

.page-about .chapter-index ol {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .chapter-index a {
  display: flex;
  gap: 12px;
  align-items: baseline;
  padding: 12px 0;
  font-size: var(--fs-16);
  color: var(--encre);
  text-decoration: none;
  border-bottom: 1px solid rgba(201, 162, 39, 0.16);
  transition: color 0.2s ease, border-color 0.2s ease;
}

.page-about .chapter-index a:hover,
.page-about .chapter-index a:focus-visible {
  color: var(--pourpre);
  border-bottom-color: var(--or);
}

.page-about .idx-num {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--or);
  flex: none;
}

/* 章节骨架 */
.page-about .chapter {
  position: relative;
  padding: 44px 0;
  border-top: var(--about-line);
}

.page-about .chapter-head {
  position: relative;
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 14px;
  align-items: start;
  margin-bottom: 26px;
}

.page-about .chapter-num {
  font-family: var(--font-mono);
  font-size: var(--fs-14);
  line-height: 1.5;
  letter-spacing: 0.08em;
  color: var(--or);
  border: 1px solid rgba(201, 162, 39, 0.58);
  border-radius: var(--radius);
  padding: 6px 0;
  text-align: center;
}

.page-about .chapter-title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.4rem, 4vw, 2.1rem);
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--encre);
  margin: 0;
}

.page-about .chapter-aside {
  display: none;
  position: absolute;
  top: 2px;
  right: 0;
  writing-mode: vertical-rl;
  font-size: var(--fs-12);
  letter-spacing: 0.24em;
  color: var(--or);
}

.page-about .chapter-lede {
  font-size: var(--fs-16);
  line-height: 1.9;
  color: var(--gris);
  max-width: 56ch;
  margin: 0 0 26px;
}

/* 图文错位 */
.page-about .split {
  display: grid;
  gap: 26px;
}

.page-about .split-text p {
  font-size: var(--fs-16);
  line-height: 1.9;
  margin: 0 0 16px;
}

.page-about .split-text p:last-child {
  margin-bottom: 0;
}

.page-about .media-frame {
  margin: 0;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(235, 217, 164, 0.7);
  background: var(--creme);
}

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

/* 沿革节点 */
.page-about .milestone-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  border-top: var(--about-line);
}

.page-about .milestone-list li {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 12px;
  padding: 12px 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--encre);
  border-bottom: var(--about-line);
}

.page-about .ms-year {
  font-family: var(--font-mono);
  font-size: var(--fs-12);
  letter-spacing: 0.04em;
  color: var(--pourpre);
  padding-top: 2px;
}

/* 色带 */
.page-about .swatch-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(88px, 1fr));
  gap: 8px;
  margin-top: 32px;
}

.page-about .swatch {
  margin: 0;
  background: var(--sw);
  border-radius: var(--radius);
  border: 1px solid rgba(22, 18, 19, 0.12);
  padding: 12px 10px 14px;
  min-height: 132px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  gap: 4px;
  transition: transform 0.22s ease, box-shadow 0.22s ease, border-color 0.22s ease;
}

.page-about .swatch:hover,
.page-about .swatch:focus-within {
  transform: translateY(-4px);
  box-shadow: 0 10px 22px rgba(94, 15, 27, 0.16);
  border-color: var(--or);
}

.page-about .swatch--dark {
  color: var(--blanc-chaud);
}

.page-about .swatch--light {
  color: var(--encre);
}

.page-about .swatch-name {
  font-family: var(--font-display);
  font-size: var(--fs-14);
  font-weight: 700;
  line-height: 1.4;
}

.page-about .swatch-hex {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.02em;
  opacity: 0.72;
}

.page-about .swatch:hover .swatch-hex,
.page-about .swatch:focus-within .swatch-hex {
  opacity: 1;
}

.page-about .swatch-use {
  font-size: 11px;
  line-height: 1.5;
  opacity: 0.86;
}

/* 团队 */
.page-about .team-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.page-about .team-card {
  background: var(--creme);
  border: 1px solid rgba(235, 217, 164, 0.9);
  border-radius: var(--radius);
  padding: 18px 16px 20px;
  min-width: 0;
}

.page-about .team-num {
  font-family: var(--font-mono);
  font-size: var(--fs-32);
  line-height: 1;
  color: var(--pourpre-deep);
  margin: 0 0 12px;
  letter-spacing: 0.02em;
}

.page-about .team-name {
  font-family: var(--font-display);
  font-size: var(--fs-18);
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--encre);
}

.page-about .team-desc {
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--gris);
  margin: 0;
}

.page-about .note-band {
  margin-top: 24px;
  padding: 20px 18px;
  border-left: 3px solid var(--or);
  background: var(--verre);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.page-about .note-band p {
  font-size: var(--fs-14);
  line-height: 1.85;
  margin: 0 0 10px;
}

.page-about .note-band p:last-child {
  margin-bottom: 0;
}

/* 服务网络 */
.page-about .network-layout {
  display: grid;
  gap: 24px;
}

.page-about .network-main p {
  font-size: var(--fs-16);
  line-height: 1.9;
  margin: 0 0 16px;
}

.page-about .network-main p:last-child {
  margin-bottom: 0;
}

.page-about .network-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: var(--about-line);
}

.page-about .network-list li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 14px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: var(--about-line);
}

.page-about .nl-key {
  font-family: var(--font-mono);
  font-size: var(--fs-24);
  line-height: 1;
  color: var(--qingdai);
}

.page-about .nl-val {
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--encre);
}

.page-about .network-foot {
  margin: 24px 0 0;
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--gris);
}

/* 荣誉 */
.page-about .honor-grid {
  display: grid;
  gap: 14px;
}

.page-about .honor-card {
  border: 1px solid rgba(201, 162, 39, 0.34);
  border-radius: var(--radius);
  padding: 20px 18px;
  background: var(--creme);
}

.page-about .honor-card--plain {
  background: transparent;
  border-style: dashed;
}

.page-about .honor-year {
  font-family: var(--font-mono);
  font-size: var(--fs-18);
  color: var(--ambre);
  margin: 0 0 10px;
  letter-spacing: 0.02em;
}

.page-about .honor-title {
  font-family: var(--font-display);
  font-size: var(--fs-18);
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--encre);
}

.page-about .honor-desc {
  font-size: var(--fs-14);
  line-height: 1.85;
  color: var(--gris);
  margin: 0;
}

/* 版本时间线 */
.page-about .chapter--versions {
  overflow: hidden;
}

.page-about .timeline-texture {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  opacity: 0.18;
}

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

.page-about .chapter--versions > *:not(.timeline-texture) {
  position: relative;
  z-index: 1;
}

.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .tl-item {
  position: relative;
  padding: 16px 16px 18px 20px;
  border-left: 1px solid rgba(201, 162, 39, 0.5);
  background: var(--verre);
  border-radius: 0 var(--radius) var(--radius) 0;
  transition: background 0.22s ease, border-color 0.22s ease;
}

.page-about .tl-item:hover {
  background: var(--creme);
  border-left-color: var(--pourpre);
}

.page-about .tl-dot {
  position: absolute;
  top: 22px;
  left: -7px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  border: 2px solid var(--or);
  background: var(--blanc-chaud);
  transition: background 0.22s ease;
}

.page-about .tl-item:hover .tl-dot {
  background: var(--or);
}

.page-about .tl-title {
  font-family: var(--font-display);
  font-size: var(--fs-18);
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--encre);
}

.page-about .tl-price {
  font-family: var(--font-mono);
  font-size: var(--fs-24);
  line-height: 1.2;
  margin: 0 0 10px;
  color: var(--pourpre-deep);
  letter-spacing: 0.02em;
}

.page-about .tl-price .num {
  font-size: var(--fs-32);
}

.page-about .tl-price--text {
  font-family: var(--font-body);
  font-size: var(--fs-18);
  color: var(--qingdai);
  letter-spacing: 0.04em;
}

.page-about .tl-desc {
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--encre);
  margin: 0 0 8px;
}

.page-about .tl-note {
  font-size: var(--fs-12);
  line-height: 1.7;
  color: var(--gris);
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.25s ease, opacity 0.25s ease, margin 0.25s ease;
}

.page-about .tl-item:hover .tl-note,
.page-about .tl-item:focus-within .tl-note {
  max-height: 60px;
  opacity: 1;
  margin-top: 6px;
}

.page-about .version-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-about .version-actions .btn {
  font-size: var(--fs-14);
  padding: 12px 22px;
  text-decoration: none;
  border-radius: var(--radius);
  display: inline-flex;
  align-items: center;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

/* 平板及以上 */
@media (min-width: 720px) {
  .page-about .hero-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
  }

  .page-about .chapter-index ol {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 28px;
  }

  .page-about .team-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-about .network-layout {
    grid-template-columns: 1.15fr 1fr;
    gap: 32px;
    align-items: start;
  }

  .page-about .swatch-strip {
    grid-template-columns: repeat(8, minmax(0, 1fr));
  }
}

/* 桌面：图文错位与时间线横排 */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 40px 0 52px;
  }

  .page-about .chapter {
    padding: 60px 0;
  }

  .page-about .chapter-head {
    padding-right: 56px;
    margin-bottom: 34px;
  }

  .page-about .chapter-aside {
    display: block;
  }

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

  .page-about .split {
    grid-template-columns: repeat(12, 1fr);
    column-gap: 32px;
    align-items: start;
  }

  .page-about .split-media {
    grid-column: 1 / span 7;
    grid-row: 1;
  }

  .page-about .split-text {
    grid-column: 8 / span 5;
    grid-row: 1;
  }

  .page-about .split--flip .split-media {
    grid-column: 6 / span 7;
  }

  .page-about .split--flip .split-text {
    grid-column: 1 / span 5;
  }

  .page-about .timeline {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 22px;
    padding-bottom: 8px;
  }

  .page-about .timeline::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 8px;
    height: 1px;
    background: linear-gradient(90deg, rgba(201, 162, 39, 0) 0%, var(--or) 12%, var(--or) 88%, rgba(201, 162, 39, 0) 100%);
  }

  .page-about .chapter--versions .timeline {
    position: relative;
  }

  .page-about .tl-item {
    border-left: none;
    border-top: 1px solid transparent;
    background: transparent;
    border-radius: var(--radius);
    padding: 28px 18px 20px;
  }

  .page-about .tl-item:hover {
    background: var(--verre);
  }

  .page-about .tl-dot {
    top: 2px;
    left: 18px;
  }

  .page-about .tl-item:nth-child(even) {
    margin-top: 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .swatch,
  .page-about .tl-item,
  .page-about .chapter-index a,
  .page-about .version-actions .btn {
    transition: none;
  }

  .page-about .swatch:hover,
  .page-about .swatch:focus-within {
    transform: none;
  }
}
<<<END>>>

.page-about {
  --sw: transparent;
}