/* ===== 品牌坐标页 · 页面作用域 ===== */
.page-about {
  --ab-hair: rgba(244, 242, 238, 0.13);
  --ab-paper-hair: rgba(14, 14, 16, 0.14);
  --ab-gutter: 24px;
  color: var(--text);
  background: var(--ink);
  padding-bottom: clamp(48px, 7vw, 88px);
}

@media (min-width: 760px) {
  .page-about {
    --ab-gutter: 34px;
  }
}

.page-about .about-wrap {
  padding-top: clamp(14px, 2.4vw, 28px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(22px, 3.6vw, 44px);
  padding-bottom: clamp(28px, 4.4vw, 52px);
  border-bottom: 1px solid var(--ab-hair);
}

.page-about .about-hero__title {
  margin: 14px 0 0;
  font-size: clamp(1.9rem, 6.2vw, 3.5rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--text);
}

.page-about .about-hero__title::before {
  content: "";
  display: block;
  width: 44px;
  height: 5px;
  margin-bottom: 22px;
  background: var(--red);
}

.page-about .about-hero__grid {
  display: grid;
  gap: 20px;
  margin-top: 26px;
}

@media (min-width: 900px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }
}

.page-about .about-hero__lede {
  margin: 0;
  font-size: clamp(1rem, 1.55vw, 1.12rem);
  line-height: 1.85;
  color: var(--text-soft);
}

.page-about .about-hero__note {
  margin: 0;
  padding-left: 16px;
  border-left: 2px solid var(--ochre);
  font-size: 0.88rem;
  line-height: 1.8;
  color: var(--text-muted);
}

/* 首屏数字条 */
.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(26px, 4vw, 40px);
  background: var(--ab-hair);
  border: 1px solid var(--ab-hair);
}

@media (min-width: 760px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-figure {
  background: var(--ink);
  padding: 18px 16px 20px;
}

.page-about .about-figure__num {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(1.9rem, 4.6vw, 2.7rem);
  line-height: 1;
  letter-spacing: -0.01em;
  color: var(--cyan);
}

.page-about .about-figure__label {
  display: block;
  margin-top: 8px;
  font-size: 0.76rem;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--text-muted);
}

/* ---------- 章节时间线骨架 ---------- */
.page-about .about-chapter {
  position: relative;
  padding-left: var(--ab-gutter);
  margin-top: clamp(44px, 6.6vw, 84px);
}

.page-about .about-chapter::before {
  content: "";
  position: absolute;
  top: 6px;
  left: calc(var(--ab-gutter) / 2 - 5.5px);
  width: 11px;
  height: 11px;
  background: var(--red);
}

.page-about .about-chapter::after {
  content: "";
  position: absolute;
  top: 24px;
  bottom: 0;
  left: calc(var(--ab-gutter) / 2 - 0.5px);
  width: 1px;
  background: var(--ab-hair);
}

.page-about .about-chapter__meta {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0;
  font-size: 0.74rem;
  letter-spacing: 0.08em;
  color: var(--text-muted);
}

.page-about .about-chapter__num {
  font-family: var(--font-num);
  font-size: 1rem;
  letter-spacing: 0.04em;
  color: var(--red);
}

.page-about .about-chapter__title {
  margin: 8px 0 0;
  font-size: clamp(1.32rem, 3.5vw, 2rem);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text);
}

/* 浅色分区的章节 */
.page-about .about-chapter--paper {
  --ab-gutter: 28px;
  background: var(--paper);
  padding: clamp(22px, 3.4vw, 40px) clamp(18px, 3vw, 36px) clamp(24px, 3.6vw, 42px) var(--ab-gutter);
}

@media (min-width: 760px) {
  .page-about .about-chapter--paper {
    --ab-gutter: 46px;
  }
}

.page-about .about-chapter--paper::after {
  background: var(--ab-paper-hair);
}

.page-about .about-chapter--paper .about-chapter__meta {
  color: #676b72;
}

.page-about .about-chapter--paper .about-chapter__num {
  color: var(--red-deep);
}

.page-about .about-chapter--paper .about-chapter__title {
  color: #101215;
}

.page-about .about-chapter__body {
  display: grid;
  gap: 26px;
  margin-top: 22px;
}

@media (min-width: 900px) {
  .page-about .about-chapter__body {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 44px;
    align-items: start;
  }
}

/* 正文 */
.page-about .about-prose {
  margin-top: 18px;
}

.page-about .about-chapter__body .about-prose {
  margin-top: 0;
}

.page-about .about-prose p {
  margin: 0 0 1.05em;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--text-soft);
}

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

.page-about .about-chapter--paper .about-prose p {
  color: #3d4147;
}

/* 大号数字引用块 */
.page-about .about-pull {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  margin-top: 30px;
  padding-top: 22px;
  border-top: 1px solid var(--ab-hair);
}

.page-about .about-chapter--paper .about-pull {
  border-top-color: var(--ab-paper-hair);
}

.page-about .about-pull__num {
  font-family: var(--font-num);
  font-size: clamp(2.3rem, 5.8vw, 3.3rem);
  line-height: 0.82;
  letter-spacing: -0.01em;
  color: var(--red);
}

.page-about .about-pull__text {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--text-muted);
}

.page-about .about-chapter--paper .about-pull__text {
  color: #565a61;
}

/* 配图 */
.page-about .about-media {
  margin: 0;
}

.page-about .about-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.72) contrast(1.04);
}

.page-about .about-media--square {
  max-width: 100%;
}

.page-about .about-media__caption {
  margin-top: 10px;
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  color: var(--text-muted);
}

.page-about .about-chapter--paper .about-media__caption {
  color: #6b6f76;
}

/* 四步流程 */
.page-about .about-steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

@media (min-width: 720px) {
  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

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

.page-about .about-step {
  background: #fbfaf7;
  border-top: 2px solid var(--red);
  padding: 18px 16px 22px;
}

.page-about .about-step__idx {
  display: block;
  font-family: var(--font-num);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--red-deep);
}

.page-about .about-step__title {
  margin: 8px 0 0;
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.4;
  color: #101215;
}

.page-about .about-step__text {
  margin: 8px 0 0;
  font-size: 0.86rem;
  line-height: 1.72;
  color: #4a4e55;
}

/* 团队三列 */
.page-about .about-team {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

@media (min-width: 820px) {
  .page-about .about-team {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-team__card {
  position: relative;
  background: var(--carbon);
  border: 1px solid var(--ab-hair);
  padding: 20px 18px 22px 24px;
}

.page-about .about-team__card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--red);
}

.page-about .about-team__card:nth-child(2n)::before {
  background: var(--ochre);
}

.page-about .about-team__count {
  display: block;
  font-family: var(--font-num);
  font-size: 2.1rem;
  line-height: 1;
  color: var(--cyan);
}

.page-about .about-team__count small {
  margin-left: 4px;
  font-family: var(--font-cn);
  font-size: 0.82rem;
  color: var(--text-muted);
}

.page-about .about-team__role {
  margin: 8px 0 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-team__desc {
  margin: 8px 0 0;
  font-size: 0.86rem;
  line-height: 1.72;
  color: var(--text-muted);
}

/* 通栏图 */
.page-about .about-banner {
  margin: clamp(44px, 6.6vw, 84px) 0;
}

.page-about .about-banner img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(0.7) contrast(1.05);
}

.page-about .about-banner__caption {
  margin-top: 10px;
  font-size: 0.74rem;
  letter-spacing: 0.05em;
  color: var(--text-muted);
}

/* 版本阶段条 */
.page-about .about-stages {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: 24px;
  background: var(--ab-hair);
  border: 1px solid var(--ab-hair);
}

@media (min-width: 860px) {
  .page-about .about-stages {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

.page-about .about-stage {
  display: block;
  background: var(--carbon);
  border-top: 2px solid transparent;
  padding: 16px 14px 18px;
  text-decoration: none;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.page-about .about-stage:hover,
.page-about .about-stage:focus-visible {
  border-top-color: var(--cyan);
  background: #22262b;
}

.page-about .about-stage__year {
  display: block;
  font-family: var(--font-num);
  font-size: 1.5rem;
  line-height: 1;
  color: var(--text);
}

.page-about .about-stage__name {
  display: block;
  margin-top: 6px;
  font-size: 0.76rem;
  line-height: 1.5;
  letter-spacing: 0.03em;
  color: var(--text-muted);
}

.page-about .about-stage-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-stage-item {
  background: var(--carbon);
  border-left: 2px solid var(--graphite);
  padding: 14px 16px 16px;
  transition: border-color 0.18s ease;
}

.page-about .about-stage-item:target {
  border-left-color: var(--cyan);
}

.page-about .about-stage-item h3 {
  margin: 0;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--text);
}

.page-about .about-stage-item p {
  margin: 6px 0 0;
  font-size: 0.86rem;
  line-height: 1.72;
  color: var(--text-muted);
}

/* 共建三块 */
.page-about .about-partners {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

@media (min-width: 700px) {
  .page-about .about-partners {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

.page-about .about-partner {
  border-top: 2px solid var(--ochre);
  padding-top: 12px;
}

.page-about .about-partner__num {
  display: block;
  font-family: var(--font-num);
  font-size: 2rem;
  line-height: 1;
  color: #121417;
}

.page-about .about-partner__label {
  display: block;
  margin-top: 6px;
  font-size: 0.82rem;
  line-height: 1.65;
  color: #4a4e55;
}

/* 更新节奏条 */
.page-about .about-cadence {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--ab-hair);
  border-block: 1px solid var(--ab-hair);
}

@media (min-width: 760px) {
  .page-about .about-cadence {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

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

.page-about .about-cadence__item {
  background: var(--ink);
  padding: 20px 18px 22px;
}

.page-about .about-cadence__time {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(1.5rem, 3.2vw, 1.9rem);
  line-height: 1;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-about .about-cadence__label {
  display: block;
  margin-top: 10px;
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--text-muted);
}

/* 结尾导航 */
.page-about .about-next {
  margin-top: clamp(48px, 7vw, 88px);
  padding-top: clamp(24px, 3.6vw, 40px);
  border-top: 1px solid var(--ab-hair);
}

.page-about .about-next__title {
  margin: 0 0 20px;
  font-size: clamp(1.1rem, 2.6vw, 1.45rem);
  font-weight: 900;
  line-height: 1.35;
  color: var(--text);
}

.page-about .about-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

@media (max-width: 520px) {
  .page-about .about-next__actions .btn {
    flex: 1 1 100%;
    text-align: left;
  }
}
<<<END>>>