.page-about {
  --about-cut: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
  background: var(--paper);
  color: var(--text);
  overflow-x: hidden;
}

.page-about .container {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 20px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  background: var(--ink-900);
  color: var(--paper);
  padding: 24px 0 40px;
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: -12%;
  right: -12%;
  bottom: -70px;
  height: 150px;
  background: linear-gradient(90deg, rgba(255, 106, 43, 0.22), rgba(255, 106, 43, 0) 62%);
  transform: rotate(-6deg);
  pointer-events: none;
}

.page-about .breadcrumb {
  position: relative;
  z-index: 1;
  margin-bottom: 28px;
  font-size: 13px;
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  color: var(--paper-dim);
}

.page-about .breadcrumb-list li + li::before {
  content: "/";
  margin-right: 8px;
  color: rgba(246, 243, 234, 0.4);
}

.page-about .breadcrumb-list a {
  color: var(--paper-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}

.page-about .breadcrumb-list a:hover,
.page-about .breadcrumb-list a:focus-visible {
  color: var(--paper);
  border-color: var(--orange);
}

.page-about .eyebrow {
  margin: 0 0 16px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--orange-soft);
}

.page-about .hero-title {
  position: relative;
  z-index: 1;
  margin: 0;
  max-width: 22ch;
  font-size: clamp(2rem, 8.4vw, 4.4rem);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -0.02em;
}

.page-about .hero-title::after {
  content: "";
  display: block;
  width: 76px;
  height: 6px;
  margin-top: 20px;
  background: var(--orange);
  transform: skewX(-24deg);
}

.page-about .hero-lede {
  position: relative;
  z-index: 1;
  margin: 22px 0 0;
  max-width: 56ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--paper-dim);
}

.page-about .hero-stats,
.page-about .user-stats {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.page-about .hero-stats .stat {
  border-top: 1px solid var(--line-light);
  padding-top: 12px;
}

.page-about .stat-num {
  display: block;
  font-family: var(--mono);
  font-size: clamp(1.6rem, 6.2vw, 2.5rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--green);
}

.page-about .stat-label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--paper-dim);
}

.page-about .about-jump {
  position: relative;
  z-index: 1;
  display: flex;
  gap: 8px;
  margin-top: 32px;
  padding-bottom: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .about-jump::-webkit-scrollbar {
  display: none;
}

.page-about .about-jump a {
  flex: 0 0 auto;
  padding: 8px 14px;
  border: 1px solid var(--line-light);
  border-radius: var(--pill);
  font-size: 13px;
  color: var(--paper-dim);
  text-decoration: none;
  white-space: nowrap;
  transition: border-color 160ms var(--ease), color 160ms var(--ease);
}

.page-about .about-jump a:hover,
.page-about .about-jump a:focus-visible {
  border-color: var(--orange);
  color: var(--paper);
}

/* ---------- 区块基础 ---------- */
.page-about .sec {
  padding: 56px 0;
}

.page-about .sec--sand {
  background: var(--sand);
}

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

.page-about .sec-tag {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--orange);
}

.page-about .sec-title {
  margin: 0;
  max-width: 24ch;
  font-size: clamp(1.5rem, 5.4vw, 2.4rem);
  font-weight: 800;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}

.page-about .sec-lede {
  margin: 16px 0 0;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--rock);
}

.page-about .body-text p {
  max-width: 62ch;
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
}

/* ---------- 为什么 ---------- */
.page-about .why-grid {
  display: grid;
  gap: 24px;
}

.page-about .why-note {
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--orange);
  background: rgba(255, 255, 255, 0.6);
  padding: 20px;
  clip-path: var(--about-cut);
}

.page-about .why-note-title {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--blue-600);
}

.page-about .why-note ul {
  margin: 0;
  padding-left: 18px;
  display: grid;
  gap: 10px;
}

.page-about .why-note li {
  font-size: 15px;
  line-height: 1.7;
  color: var(--rock);
}

/* ---------- 团队 ---------- */
.page-about .team-shot {
  margin: 0 0 24px;
  border: 1px solid var(--line);
  clip-path: var(--about-cut);
  background: var(--ink-800);
}

.page-about .team-shot img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 10;
}

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

.page-about .flow-card {
  border: 1px solid var(--line);
  border-top: 3px solid var(--ink-800);
  background: rgba(255, 255, 255, 0.55);
  padding: 20px;
  clip-path: var(--about-cut);
  transition: transform 180ms var(--ease), border-color 180ms var(--ease);
}

.page-about .flow-card:hover {
  transform: translateY(-4px);
  border-top-color: var(--orange);
}

.page-about .flow-num {
  margin: 0 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-about .flow-card h3 {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--ink-900);
}

.page-about .flow-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--rock);
}

/* ---------- 时间轴 ---------- */
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 32px;
}

.page-about .tl-item {
  position: relative;
  display: grid;
  gap: 10px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.page-about .tl-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: -1px;
  width: 120px;
  height: 1px;
  background: var(--orange);
  transform: rotate(-6deg);
  transform-origin: left center;
}

.page-about .tl-year {
  font-family: var(--mono);
  font-size: clamp(1.9rem, 7.6vw, 2.8rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--ink-800);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
}

.page-about .tl-ver {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--orange);
}

.page-about .tl-body h3 {
  margin: 0 0 10px;
  font-size: clamp(1.05rem, 3.4vw, 1.3rem);
  font-weight: 700;
  color: var(--ink-900);
}

.page-about .tl-body p {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--rock);
}

.page-about .tl-more {
  margin-top: 32px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.6);
  padding: 16px 20px;
  clip-path: var(--about-cut);
}

.page-about .tl-more summary {
  cursor: pointer;
  font-family: var(--mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--blue-600);
  list-style: none;
}

.page-about .tl-more summary::-webkit-details-marker {
  display: none;
}

.page-about .tl-more summary::before {
  content: "＋";
  margin-right: 8px;
  color: var(--orange);
}

.page-about .tl-more[open] summary::before {
  content: "－";
}

.page-about .tl-more-body {
  padding-top: 14px;
}

.page-about .tl-more-body p {
  margin: 0 0 12px;
  max-width: 66ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--rock);
}

.page-about .tl-more-body p:last-child {
  margin-bottom: 0;
}

/* ---------- 对照记录 ---------- */
.page-about .compare-grid {
  display: grid;
  gap: 28px;
}

.page-about .about-table-scroll {
  overflow-x: auto;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.7);
}

.page-about .about-table {
  width: 100%;
  min-width: 560px;
  border-collapse: collapse;
  font-size: 14px;
}

.page-about .about-table caption {
  caption-side: top;
  padding: 12px 14px;
  text-align: left;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--blue-600);
  border-bottom: 1px solid var(--line);
}

.page-about .about-table th,
.page-about .about-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
  line-height: 1.7;
  color: var(--text);
}

.page-about .about-table thead th {
  font-family: var(--mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--ink-800);
  background: var(--sand);
  white-space: nowrap;
}

.page-about .about-table tbody tr:nth-child(even) td {
  background: rgba(234, 228, 214, 0.55);
}

.page-about .about-table tbody th[scope="row"] {
  position: sticky;
  left: 0;
  z-index: 1;
  background: var(--paper);
  font-weight: 700;
  color: var(--ink-900);
  white-space: nowrap;
}

.page-about .about-table tbody tr:nth-child(even) th[scope="row"] {
  background: var(--sand);
}

.page-about .about-table tbody tr:hover td {
  background: rgba(255, 106, 43, 0.1);
}

.page-about .compare-hint {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--rock);
}

.page-about .compare-figure {
  margin: 0;
  border: 1px solid var(--line-strong);
  background: var(--ink-900);
  clip-path: var(--about-cut);
  padding: 0 0 16px;
}

.page-about .compare-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 3 / 2;
}

.page-about .compare-figure figcaption {
  padding: 14px 18px 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--paper-dim);
}

.page-about .compare-steps {
  display: grid;
  gap: 16px;
  margin-top: 28px;
}

.page-about .compare-steps article {
  border-left: 3px solid var(--moss);
  padding: 4px 0 4px 16px;
}

.page-about .compare-steps h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink-900);
}

.page-about .compare-steps p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--rock);
}

/* ---------- 数据来源 ---------- */
.page-about .source-grid {
  display: grid;
  gap: 16px;
}

.page-about .source-card {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.6);
  padding: 20px;
  clip-path: var(--about-cut);
}

.page-about .source-card h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink-800);
}

.page-about .source-card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--rock);
}

.page-about .league-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 24px;
}

.page-about .league-chip {
  padding: 7px 14px;
  border: 1px solid var(--line-strong);
  border-radius: var(--pill);
  font-size: 13px;
  color: var(--ink-800);
  background: rgba(255, 255, 255, 0.5);
}

.page-about .league-chip--more {
  border-color: transparent;
  background: var(--ink-800);
  color: var(--paper);
}

/* ---------- 服务规模 ---------- */
.page-about .user-stats {
  margin-top: 0;
}

.page-about .user-stats li {
  border-top: 2px solid var(--ink-800);
  padding-top: 12px;
}

.page-about .stat-num--ink {
  color: var(--ink-800);
}

.page-about .user-stats .stat-label {
  color: var(--rock);
}

.page-about .users-body {
  margin-top: 28px;
}

.page-about .users-body p {
  max-width: 62ch;
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
}

.page-about .users-links {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
}

.page-about .link-inline {
  color: var(--blue-600);
  text-decoration: none;
  border-bottom: 1px solid var(--orange);
  padding-bottom: 2px;
  font-size: 15px;
  transition: color 160ms var(--ease);
}

.page-about .link-inline:hover,
.page-about .link-inline:focus-visible {
  color: var(--orange);
}

/* ---------- 资质 ---------- */
.page-about .trust-grid {
  display: grid;
  gap: 24px;
}

.page-about .trust-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--sand);
  clip-path: var(--about-cut);
}

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

.page-about .trust-list {
  display: grid;
  gap: 14px;
}

.page-about .trust-list article {
  border: 1px solid var(--line);
  padding: 16px 18px;
  clip-path: var(--about-cut);
  background: rgba(255, 255, 255, 0.55);
}

.page-about .trust-list h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink-900);
}

.page-about .trust-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--rock);
}

.page-about .trust-note {
  margin: 28px 0 0;
  max-width: 62ch;
  padding-left: 16px;
  border-left: 3px solid var(--clay);
  font-size: 15px;
  line-height: 1.8;
  color: var(--rock);
}

/* ---------- 收束 ---------- */
.page-about .about-close {
  background: var(--ink-900);
  color: var(--paper);
  padding: 56px 0 64px;
  position: relative;
  overflow: hidden;
}

.page-about .about-close::before {
  content: "";
  position: absolute;
  top: 0;
  left: -10%;
  right: -10%;
  height: 6px;
  background: linear-gradient(90deg, var(--moss), var(--orange));
  transform: rotate(-2deg);
  transform-origin: left center;
}

.page-about .close-line {
  margin: 0;
  max-width: 30ch;
  font-size: clamp(1.25rem, 4.4vw, 1.9rem);
  font-weight: 800;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

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

.page-about .close-actions .btn {
  text-decoration: none;
  border-radius: var(--pill);
  padding: 12px 22px;
  font-size: 15px;
  font-weight: 600;
  transition: transform 160ms var(--ease), background-color 160ms var(--ease);
}

.page-about .close-actions .btn:hover,
.page-about .close-actions .btn:focus-visible {
  transform: translateY(-2px);
}

.page-about .close-actions .btn-primary {
  background: var(--orange);
  color: #FFFFFF;
  border: 1px solid var(--orange);
}

.page-about .close-actions .btn-light {
  background: transparent;
  color: var(--paper);
  border: 1px solid var(--line-light);
}

.page-about .close-actions .btn-light:hover,
.page-about .close-actions .btn-light:focus-visible {
  border-color: var(--orange-soft);
}

/* ---------- 平板起 ---------- */
@media (min-width: 640px) {
  .page-about .container {
    padding: 0 32px;
  }

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

  .page-about .team-flow,
  .page-about .source-grid,
  .page-about .compare-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 32px 0 56px;
  }

  .page-about .sec {
    padding: 96px 0;
  }

  .page-about .sec-head {
    margin-bottom: 48px;
    padding-left: 6%;
  }

  .page-about .hero-lede {
    font-size: 17px;
  }

  .page-about .why-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 48px;
    align-items: start;
  }

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

  .page-about .timeline {
    gap: 0;
  }

  .page-about .tl-item {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 40px;
    padding: 32px 0 40px;
  }

  .page-about .tl-year {
    position: sticky;
    top: calc(var(--header-h) + 24px);
    align-self: start;
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .page-about .tl-item::before {
    width: 180px;
  }

  .page-about .compare-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 40px;
    align-items: start;
  }

  .page-about .trust-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 48px;
    align-items: start;
  }

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

@media (prefers-reduced-motion: reduce) {
  .page-about .flow-card,
  .page-about .close-actions .btn,
  .page-about .link-inline {
    transition: none;
  }

  .page-about .flow-card:hover,
  .page-about .close-actions .btn:hover {
    transform: none;
  }
}
<<<END>>>