.page-about {
  background: var(--yl-deep);
  color: var(--yl-paper);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding-top: clamp(20px, 3vw, 40px);
  padding-bottom: clamp(44px, 6vw, 88px);
}

.page-about .about-hero__eyebrow {
  margin: 0 0 18px;
  color: var(--yl-gold-soft);
}

.page-about .about-hero__title {
  margin: 0 0 22px;
  max-width: 17ch;
}

.page-about .about-hero__lede {
  margin: 0 0 clamp(28px, 4vw, 52px);
  max-width: 36em;
  color: var(--yl-text-soft);
}

.page-about .about-hero__figure {
  margin: 0;
}

/* ---------- 章节骨架 ---------- */
.page-about .about-chapter {
  position: relative;
  padding-top: clamp(48px, 7vw, 100px);
  padding-bottom: clamp(48px, 7vw, 100px);
}

.page-about .about-deep { background: var(--yl-deep); }
.page-about .about-deep2 { background: var(--yl-deep-2); }

.page-about .about-paper {
  background: var(--yl-paper);
  color: var(--yl-ink);
}

.page-about .about-chapter__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(14px, 3vw, 24px);
}

@media (min-width: 900px) {
  .page-about .about-chapter__grid {
    grid-template-columns: 128px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 76px);
    align-items: start;
  }
  .page-about .about-num {
    position: sticky;
    top: 108px;
  }
}

.page-about .about-chapter__body {
  min-width: 0;
}

/* ---------- 编号与标题 ---------- */
.page-about .about-num {
  margin: 0;
  font-family: var(--yl-font-mono);
  font-size: clamp(30px, 6vw, 54px);
  line-height: 1;
  letter-spacing: 0.06em;
  color: var(--yl-gold);
  opacity: 0.9;
}

.page-about .about-paper .about-num {
  color: var(--yl-tide);
  opacity: 1;
}

.page-about .about-h2 {
  margin: 0 0 18px;
  font-size: clamp(23px, 3.2vw, 38px);
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.27;
  max-width: 20ch;
}

.page-about .about-h3 {
  margin: 0 0 6px;
  font-size: clamp(16px, 1.5vw, 19px);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.4;
}

.page-about .about-p {
  margin: 0 0 15px;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.9;
  color: var(--yl-text-soft);
}

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

.page-about .about-paper .about-p {
  color: var(--yl-rock);
}

/* ---------- 时间线 ---------- */
.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: clamp(26px, 4vw, 42px) 0 0;
  padding: 0 0 0 32px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: rgba(30, 90, 138, 0.28);
}

.page-about .about-timeline__item {
  position: relative;
  margin-bottom: 28px;
}

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

.page-about .about-timeline__item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  background: var(--yl-gold);
  box-shadow: 0 0 0 4px rgba(226, 179, 60, 0.18);
}

.page-about .about-timeline__item .about-p {
  margin-bottom: 0;
}

/* ---------- 人员结构条 ---------- */
.page-about .about-bars {
  list-style: none;
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-about .about-bars__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 6px 12px;
  align-items: baseline;
}

.page-about .about-bars__label {
  font-size: 15px;
  color: var(--yl-text-soft);
}

.page-about .about-bars__value {
  font-size: 14px;
  color: var(--yl-gold-soft);
}

.page-about .about-bars__track {
  grid-column: 1 / -1;
  display: block;
  height: 8px;
  border-radius: 999px;
  background: rgba(246, 241, 231, 0.12);
  overflow: hidden;
}

.page-about .about-bars__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
}

.page-about .about-bars__fill--gold {
  width: 37.5%;
  background: var(--yl-gold);
}

.page-about .about-bars__fill--celadon {
  width: 31.7%;
  background: var(--yl-celadon);
}

.page-about .about-bars__fill--tide {
  width: 30.8%;
  background: var(--yl-tide);
}

/* ---------- 图组 ---------- */
.page-about .about-team__figure,
.page-about .about-trust__figure {
  margin: clamp(30px, 5vw, 52px) 0 0;
}

/* ---------- 数据格 ---------- */
.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin-top: clamp(26px, 4vw, 40px);
  border-top: 1px solid rgba(30, 90, 138, 0.24);
  border-left: 1px solid rgba(30, 90, 138, 0.24);
}

.page-about .about-figure {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 22px 18px;
  border-right: 1px solid rgba(30, 90, 138, 0.24);
  border-bottom: 1px solid rgba(30, 90, 138, 0.24);
}

.page-about .about-figure__num {
  font-size: clamp(20px, 2.6vw, 28px);
  font-weight: 700;
  color: var(--yl-tide);
  letter-spacing: 0.01em;
}

.page-about .about-figure__label {
  font-size: 14px;
  line-height: 1.7;
  color: var(--yl-rock);
}

/* ---------- 服务承诺 ---------- */
.page-about .about-pledge {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--yl-line);
  border-top: 1px solid var(--yl-line);
  border-bottom: 1px solid var(--yl-line);
}

.page-about .about-pledge__item {
  background: var(--yl-deep-2);
  padding: 24px 20px;
  border-left: 2px solid transparent;
  transition: border-color 0.32s var(--yl-ease), background 0.32s var(--yl-ease);
}

.page-about .about-pledge__item .about-p {
  margin-bottom: 0;
}

.page-about .about-pledge__item:hover {
  border-left-color: var(--yl-gold);
  background: rgba(11, 30, 51, 0.72);
}

/* ---------- 收尾按钮 ---------- */
.page-about .about-cta {
  margin-top: clamp(30px, 4vw, 46px);
  flex-wrap: wrap;
}

/* ---------- 桌面栅格扩展 ---------- */
@media (min-width: 760px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
  .page-about .about-pledge {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-about .about-figure {
    padding: 26px 22px;
  }
}

@media (min-width: 1100px) {
  .page-about .about-hero__title {
    max-width: 15ch;
  }
  .page-about .about-pledge {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

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