.page-about {
  --about-gold-line: rgba(200, 162, 74, 0.28);
  --about-ink-soft: rgba(36, 42, 49, 0.76);
  --about-paper-soft: rgba(246, 241, 231, 0.78);
  background: var(--paper-100);
  color: var(--graphite);
  overflow-x: clip;
}

.page-about .about-crumb {
  position: relative;
  z-index: 2;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 30px;
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-about .about-crumb a {
  color: var(--gold-300);
  text-decoration: none;
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  text-decoration: underline;
}

.page-about .about-crumb span[aria-current] {
  color: var(--paper-100);
}

/* 首屏 */
.page-about .about-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + 40px) 0 60px;
  background: var(--ink-900);
  color: var(--paper-100);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -22%;
  right: -24%;
  width: clamp(260px, 52%, 720px);
  height: 152%;
  background: linear-gradient(155deg, rgba(20, 50, 79, 0.95), rgba(11, 27, 43, 0) 74%);
  clip-path: polygon(34% 0, 100% 0, 100% 100%, 0 100%);
  z-index: -1;
  pointer-events: none;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-500), var(--cinnabar) 55%, var(--celadon));
}

.page-about .about-hero-grid {
  display: grid;
  gap: 38px;
}

.page-about .about-h1 {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(1.85rem, 4.6vw, 3.35rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  margin: 18px 0 22px;
  color: var(--paper-100);
  text-wrap: balance;
}

.page-about .about-lead {
  max-width: 60ch;
  margin: 0 0 28px;
  font-size: clamp(0.94rem, 1.5vw, 1.04rem);
  line-height: 1.9;
  color: var(--about-paper-soft);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .about-facts {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--about-gold-line);
  border: 1px solid var(--about-gold-line);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 26px), calc(100% - 26px) 100%, 0 100%);
}

.page-about .fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: var(--ink-900);
}

.page-about .fact-num {
  font-size: clamp(1.4rem, 2.6vw, 1.85rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--gold-300);
}

.page-about .fact-label {
  font-size: 0.76rem;
  line-height: 1.55;
  color: var(--mist);
}

/* 区块基础 */
.page-about .about-sec {
  position: relative;
  padding: 58px 0;
}

.page-about .about-sec h2 {
  font-family: var(--font-serif);
  font-weight: 800;
  font-size: clamp(1.45rem, 2.9vw, 2.2rem);
  line-height: 1.3;
  letter-spacing: -0.005em;
  margin: 14px 0 18px;
  color: var(--ink-900);
}

.page-about .about-sec p {
  font-size: 0.94rem;
  line-height: 1.9;
  margin: 0 0 16px;
  max-width: 66ch;
  color: var(--about-ink-soft);
}

.page-about .about-sec--ink {
  background: var(--ink-900);
  color: var(--paper-100);
}

.page-about .about-sec--dark {
  background: var(--ink-700);
  color: var(--paper-100);
}

.page-about .about-sec--ink h2,
.page-about .about-sec--dark h2 {
  color: var(--paper-100);
}

.page-about .about-sec--ink p,
.page-about .about-sec--dark p {
  color: var(--about-paper-soft);
}

.page-about .about-split {
  display: grid;
  gap: 34px;
}

.page-about .about-split-media,
.page-about .about-team-media {
  margin: 0;
}

.page-about .media-caption {
  margin-top: 12px;
  padding-left: 10px;
  border-left: 2px solid var(--gold-500);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--about-ink-soft);
}

.page-about .about-sec--ink .media-caption,
.page-about .about-sec--dark .media-caption {
  color: var(--mist);
}

.page-about .about-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
  margin-top: auto;
  padding-bottom: 3px;
  font-size: 0.83rem;
  font-weight: 600;
  text-decoration: none;
  color: var(--gold-500);
  border-bottom: 1px solid rgba(200, 162, 74, 0.5);
  transition: color 0.3s var(--ease), border-color 0.3s var(--ease);
}

.page-about .about-link::after {
  content: "→";
  font-size: 0.9em;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--gold-300);
  border-color: var(--gold-300);
}

.page-about .about-ticks {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-ticks li {
  position: relative;
  padding-left: 26px;
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--graphite);
}

.page-about .about-ticks li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 0.6em;
  width: 10px;
  height: 10px;
  background: var(--celadon);
  transform: rotate(45deg);
}

/* 品牌服务栏目入口 */
.page-about .about-band {
  position: relative;
  overflow: hidden;
  background: var(--ink-700);
  color: var(--paper-100);
}

.page-about .about-band::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(115deg, rgba(200, 162, 74, 0.07) 0 1px, transparent 1px 92px);
  pointer-events: none;
}

.page-about .about-band > .container {
  position: relative;
}

.page-about .about-band-head h2 {
  color: var(--paper-100);
}

.page-about .about-band-lead {
  color: var(--about-paper-soft);
  max-width: 64ch;
}

.page-about .about-entries {
  list-style: none;
  margin: 38px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-gold-line);
  border: 1px solid var(--about-gold-line);
}

.page-about .about-entries li {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 26px 22px 28px;
  background: var(--ink-900);
}

.page-about .entry-num {
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  color: var(--gold-500);
}

.page-about .about-entries h3 {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1.06rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper-100);
}

.page-about .about-entries p {
  margin: 0 0 6px;
  font-size: 0.87rem;
  line-height: 1.8;
  color: rgba(246, 241, 231, 0.74);
}

/* 时间轴 */
.page-about .about-tl-lead {
  max-width: 60ch;
}

.page-about .tl {
  list-style: none;
  margin: 42px 0 0;
  padding: 0;
}

.page-about .tl-item {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
  padding-bottom: 36px;
}

.page-about .tl-item:last-child {
  padding-bottom: 0;
}

.page-about .tl-year {
  font-size: clamp(1.55rem, 4vw, 2rem);
  line-height: 1;
  letter-spacing: 0.03em;
  color: var(--gold-500);
}

.page-about .tl-dot {
  display: none;
}

.page-about .tl-tag {
  display: inline-block;
  margin: 0 0 10px;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cinnabar);
  border: 1px solid rgba(183, 58, 50, 0.35);
}

.page-about .tl-body h3 {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: clamp(1.02rem, 1.6vw, 1.2rem);
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink-900);
}

.page-about .tl-body p {
  margin: 0;
  max-width: 58ch;
  font-size: 0.89rem;
  line-height: 1.85;
  color: var(--about-ink-soft);
}

/* 团队 */
.page-about .about-team {
  overflow: hidden;
}

.page-about .about-team::before {
  content: "";
  position: absolute;
  right: -12%;
  bottom: -22%;
  width: 46%;
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle, rgba(200, 162, 74, 0.16), transparent 68%);
  pointer-events: none;
}

.page-about .about-team > .container {
  position: relative;
}

.page-about .about-team-grid {
  display: grid;
  gap: 32px;
  margin-top: 38px;
}

.page-about .team-ring {
  max-width: 300px;
  margin: 0 auto;
  width: 100%;
}

.page-about .team-ring svg {
  display: block;
  width: 100%;
  height: auto;
}

.page-about .ring-seg {
  fill: none;
  stroke-width: 22;
}

.page-about .seg-a {
  stroke: var(--gold-500);
}

.page-about .seg-b {
  stroke: var(--celadon);
}

.page-about .seg-c {
  stroke: var(--mist);
}

.page-about .ring-num {
  font-family: var(--font-mono);
  font-size: 40px;
  fill: var(--paper-100);
}

.page-about .ring-cap {
  font-family: var(--font-sans);
  font-size: 12px;
  letter-spacing: 0.14em;
  fill: var(--mist);
}

.page-about .team-legend {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--about-gold-line);
  border-top: 1px solid var(--about-gold-line);
  border-bottom: 1px solid var(--about-gold-line);
}

.page-about .team-legend li {
  padding: 16px 4px;
  background: var(--ink-900);
}

.page-about .legend-top {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-about .legend-dot {
  flex: none;
  width: 10px;
  height: 10px;
  transform: rotate(45deg);
}

.page-about .dot-a {
  background: var(--gold-500);
}

.page-about .dot-b {
  background: var(--celadon);
}

.page-about .dot-c {
  background: var(--mist);
}

.page-about .legend-name {
  font-size: 0.9rem;
  color: var(--paper-100);
}

.page-about .legend-num {
  margin-left: auto;
  font-size: 1.05rem;
  color: var(--gold-300);
}

.page-about .legend-desc {
  margin: 7px 0 0 20px;
  font-size: 0.82rem;
  line-height: 1.65;
  color: var(--mist);
}

.page-about .about-team-media {
  margin-top: 38px;
}

/* 区域网络 */
.page-about .city-list {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 22px 0 26px;
  padding: 0;
}

.page-about .city-list li {
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.04em;
  color: var(--ink-700);
  border: 1px solid var(--paper-gray);
  background: rgba(255, 255, 255, 0.6);
}

.page-about .sla {
  display: grid;
  gap: 1px;
  background: var(--paper-gray);
  border: 1px solid var(--paper-gray);
}

.page-about .sla > div {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 16px;
  background: var(--paper-100);
}

.page-about .sla-num {
  font-size: clamp(1.6rem, 3vw, 2rem);
  line-height: 1;
  color: var(--ink-900);
}

.page-about .sla-label {
  font-size: 0.79rem;
  line-height: 1.55;
  color: var(--about-ink-soft);
}

/* 认证与数据 */
.page-about .seal-grid {
  display: grid;
  gap: 14px;
  margin-top: 34px;
}

.page-about .seal {
  background: var(--ink-900);
  color: var(--paper-100);
  border: 1px solid rgba(200, 162, 74, 0.28);
}

.page-about .seal > summary {
  position: relative;
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  grid-template-rows: auto auto;
  align-items: center;
  gap: 2px 14px;
  padding: 22px 48px 22px 22px;
  cursor: pointer;
  list-style: none;
}

.page-about .seal > summary::-webkit-details-marker {
  display: none;
}

.page-about .seal > summary::after {
  content: "＋";
  position: absolute;
  top: 18px;
  right: 20px;
  font-size: 0.95rem;
  color: var(--gold-500);
}

.page-about .seal[open] > summary::after {
  content: "－";
}

.page-about .seal-mark {
  grid-row: 1 / span 2;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 2px solid var(--celadon);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.06em;
  color: var(--celadon);
}

.page-about .seal-title {
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 0.04em;
  color: var(--paper-100);
}

.page-about .seal-sub {
  font-size: 0.78rem;
  color: var(--mist);
}

.page-about .seal > p {
  margin: 0;
  padding: 0 22px 22px;
  font-size: 0.87rem;
  line-height: 1.85;
  color: var(--about-paper-soft);
}

.page-about .about-metrics {
  display: grid;
  gap: 1px;
  margin-top: 26px;
  background: rgba(246, 241, 231, 0.16);
  border: 1px solid rgba(246, 241, 231, 0.16);
}

.page-about .about-metrics > div {
  padding: 22px 20px;
  background: var(--ink-700);
}

.page-about .metric-num {
  display: block;
  margin-bottom: 8px;
  font-size: clamp(1.55rem, 3vw, 2.15rem);
  line-height: 1;
  color: var(--gold-300);
}

.page-about .metric-label {
  font-size: 0.79rem;
  line-height: 1.55;
  color: rgba(246, 241, 231, 0.74);
}

/* 合作生态 */
.page-about .eco-grid {
  display: grid;
  gap: 16px;
  margin-top: 34px;
}

.page-about .eco-card {
  position: relative;
  padding: 26px 22px 28px;
  background: #ffffff;
  border: 1px solid var(--paper-gray);
  border-top: 3px solid var(--gold-500);
}

.page-about .eco-card--accent {
  border-top-color: var(--cinnabar);
  background: var(--paper-100);
}

.page-about .eco-num {
  display: block;
  font-size: clamp(2rem, 4vw, 2.6rem);
  line-height: 1;
  color: var(--ink-900);
}

.page-about .eco-mark {
  display: block;
  font-size: clamp(1.5rem, 3.4vw, 2rem);
  line-height: 1;
  letter-spacing: 0.1em;
  color: var(--cinnabar);
}

.page-about .eco-card h3 {
  margin: 10px 0 10px;
  font-family: var(--font-serif);
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--ink-900);
}

.page-about .eco-card p {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.8;
  color: var(--about-ink-soft);
}

/* 长期承诺 */
.page-about .promise-list {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(246, 241, 231, 0.16);
  border: 1px solid rgba(246, 241, 231, 0.16);
}

.page-about .promise-list li {
  padding: 22px 20px;
  background: var(--ink-900);
}

.page-about .promise-list h3 {
  margin: 0 0 8px;
  font-family: var(--font-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--gold-300);
}

.page-about .promise-list p {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.82;
  color: var(--about-paper-soft);
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 42px;
  padding-top: 30px;
  border-top: 1px solid rgba(200, 162, 74, 0.3);
}

/* 响应式 */
@media (min-width: 560px) {
  .page-about .sla {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 720px) {
  .page-about .about-metrics {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .page-about .promise-list {
    grid-template-columns: 1fr 1fr;
  }

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

@media (min-width: 780px) {
  .page-about .about-sec {
    padding: 90px 0;
  }

  .page-about .tl-item {
    grid-template-columns: 132px 48px minmax(0, 1fr);
    gap: 0;
    align-items: start;
    padding-bottom: 46px;
  }

  .page-about .tl-year {
    font-size: clamp(1.7rem, 2.6vw, 2.25rem);
    padding-top: 2px;
  }

  .page-about .tl-dot {
    display: block;
    position: relative;
    min-height: 46px;
    height: 100%;
  }

  .page-about .tl-dot::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 8px;
    width: 12px;
    height: 12px;
    margin-left: -6px;
    background: var(--gold-500);
    transform: rotate(45deg);
    box-shadow: 0 0 0 5px var(--paper-100);
    z-index: 1;
  }

  .page-about .tl-item::after {
    content: "";
    position: absolute;
    left: 156px;
    top: 26px;
    bottom: 4px;
    width: 2px;
    background: linear-gradient(180deg, rgba(200, 162, 74, 0.65), rgba(200, 162, 74, 0.08));
    transform: skewX(-7deg);
    transform-origin: top center;
  }

  .page-about .tl-item:last-child::after {
    display: none;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: calc(var(--header-h) + 56px) 0 76px;
  }

  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(280px, 0.72fr);
    gap: 56px;
    align-items: end;
  }

  .page-about .about-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: 62px;
    align-items: center;
  }

  .page-about .about-split--rev .about-split-media {
    order: 1;
  }

  .page-about .about-split--rev .about-split-copy {
    order: 2;
  }

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

  .page-about .about-team-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: center;
    gap: 56px;
  }

  .page-about .team-ring {
    max-width: 340px;
    margin: 0;
  }
}

@media (min-width: 1080px) {
  .page-about .about-sec {
    padding: 104px 0;
  }

  .page-about .about-stance,
  .page-about .about-network {
    padding-bottom: 112px;
  }
}

@media (max-width: 420px) {
  .page-about .about-facts {
    grid-template-columns: 1fr;
  }

  .page-about .about-hero-actions .btn {
    width: 100%;
    justify-content: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-link,
  .page-about .about-stitch {
    transition: none;
  }
}
<<<END>>>