.page-about {
  --about-gap: clamp(20px, 3vw, 34px);
  --about-line: rgba(11, 31, 51, 0.16);
  --about-line-light: rgba(247, 243, 232, 0.22);
  background: var(--moon);
  color: var(--ink);
}

.page-about .about-breadcrumb {
  padding-top: 20px;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  padding: clamp(20px, 4vw, 36px) 0 clamp(32px, 5vw, 64px);
}

.page-about .about-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-hero__rail {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  padding-left: 12px;
  border-left: 2px solid var(--copper);
}

.page-about .about-hero__code {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--copper-deep);
}

.page-about .about-hero__rail-note {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--teal);
}

.page-about .about-hero__title {
  margin: 10px 0 0;
  font-size: clamp(34px, 6.2vw, 72px);
  font-weight: 900;
  line-height: 1.04;
  letter-spacing: -0.04em;
  color: var(--navy);
  max-width: 15em;
}

.page-about .about-hero__lede {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  max-width: 36em;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.8;
  color: var(--ink);
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--sand);
  border-top: 1px solid var(--sand);
  border-bottom: 1px solid var(--sand);
}

.page-about .about-stat {
  background: var(--warm);
  padding: 16px 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.page-about .about-stat__num {
  font-size: clamp(26px, 3.4vw, 38px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--navy);
}

.page-about .about-stat__unit {
  font-size: 0.5em;
  font-weight: 500;
  margin-left: 2px;
  color: var(--copper-deep);
}

.page-about .about-stat__label {
  font-size: 13px;
  line-height: 1.5;
  color: rgba(28, 28, 28, 0.72);
}

.page-about .about-hero__media {
  margin: clamp(28px, 4vw, 44px) 0 0;
}

/* ---------- 目录 ---------- */
.page-about .about-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0 0 clamp(34px, 5vw, 60px);
}

.page-about .about-jump__item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 14px;
  border: 1px solid var(--about-line);
  background: var(--warm);
  color: var(--navy);
  font-size: 14px;
  text-decoration: none;
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-jump__num {
  font-size: 11px;
  color: var(--teal);
}

.page-about .about-jump__item:hover,
.page-about .about-jump__item:focus-visible {
  background: var(--navy);
  border-color: var(--navy);
  color: var(--moon);
}

.page-about .about-jump__item:hover .about-jump__num,
.page-about .about-jump__item:focus-visible .about-jump__num {
  color: var(--cyan);
}

/* ---------- 发展历程 ---------- */
.page-about .about-timeline {
  padding: clamp(40px, 6vw, 82px) 0;
  border-top: 1px solid var(--about-line);
  background: linear-gradient(180deg, rgba(218, 210, 195, 0.34) 0%, rgba(247, 243, 232, 0) 60%);
}

.page-about .about-timeline__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-timeline__rail {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .about-timeline__title {
  font-size: clamp(24px, 2.8vw, 32px);
  line-height: 1.2;
  color: var(--navy);
}

.page-about .about-years {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-years__item {
  flex: 0 0 auto;
  padding: 6px 10px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--navy-2);
  background: rgba(255, 253, 247, 0.85);
  border: 1px solid var(--about-line);
}

.page-about .about-stages {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-about .about-stage {
  padding: 20px clamp(16px, 3vw, 28px) 24px;
  background: var(--warm);
  border-top: 2px solid var(--copper);
  border-right: 1px solid var(--about-line);
  border-bottom: 1px solid var(--about-line);
  border-left: 1px solid var(--about-line);
}

.page-about .about-stage--now {
  border-top-color: var(--cyan);
}

.page-about .about-stage__year {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--copper-deep);
}

.page-about .about-stage--now .about-stage__year {
  color: var(--teal);
}

.page-about .about-stage__title {
  margin: 10px 0 8px;
  font-size: clamp(19px, 2vw, 23px);
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--navy);
}

.page-about .about-stage__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(28, 28, 28, 0.84);
}

/* ---------- 团队 ---------- */
.page-about .about-team {
  background: var(--navy);
  color: var(--moon);
  padding: clamp(40px, 6vw, 84px) 0;
}

.page-about .about-team .eyebrow {
  color: var(--cyan);
}

.page-about .about-team .eyebrow::before {
  background: var(--copper);
}

.page-about .about-team__lead {
  max-width: 44em;
}

.page-about .about-team__title {
  color: var(--moon);
  font-size: clamp(28px, 3.6vw, 44px);
  line-height: 1.12;
  margin-top: 10px;
}

.page-about .about-team__lede {
  margin: 16px 0 0;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: rgba(247, 243, 232, 0.82);
}

.page-about .about-team__body {
  margin-top: clamp(28px, 4vw, 44px);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-tree__root {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  margin: 0;
  padding: 10px 16px;
  background: var(--copper-deep);
  color: #FFFFFF;
  font-weight: 700;
  font-size: 16px;
}

.page-about .about-tree__root-num {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.page-about .about-tree__branches {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-tree__branch {
  position: relative;
  padding: 16px 16px 18px;
  background: rgba(247, 243, 232, 0.05);
  border: 1px solid var(--about-line-light);
}

.page-about .about-tree__branch::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 26px;
  height: 2px;
  background: var(--cyan);
}

.page-about .about-tree__name {
  margin: 8px 0 6px;
  font-size: 17px;
  font-weight: 900;
  letter-spacing: -0.01em;
  color: var(--moon);
}

.page-about .about-tree__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(247, 243, 232, 0.76);
}

.page-about .about-tree__meta {
  display: block;
  margin-top: 12px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--teal);
}

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

/* ---------- 审核 ---------- */
.page-about .about-review {
  padding: clamp(40px, 6vw, 84px) 0;
}

.page-about .about-review__head {
  max-width: 44em;
}

.page-about .about-review__title {
  margin-top: 10px;
  font-size: clamp(26px, 3.4vw, 42px);
  line-height: 1.14;
  color: var(--navy);
}

.page-about .about-review__lede {
  margin: 16px 0 0;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: rgba(28, 28, 28, 0.8);
}

.page-about .about-steps {
  list-style: none;
  margin: clamp(26px, 4vw, 40px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--sand);
  border: 1px solid var(--sand);
}

.page-about .about-step {
  background: var(--warm);
  padding: 22px 18px 26px;
}

.page-about .about-step__num {
  display: block;
  font-size: 26px;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--copper);
}

.page-about .about-step__title {
  margin: 10px 0 8px;
  font-size: 19px;
  font-weight: 900;
  color: var(--navy);
}

.page-about .about-step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(28, 28, 28, 0.84);
}

.page-about .about-review__outcome {
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 18px 20px;
  background: var(--sand);
  border-left: 4px solid var(--teal);
  font-size: 15px;
  line-height: 1.8;
  font-weight: 500;
  color: var(--navy);
}

/* ---------- 合作生态 ---------- */
.page-about .about-eco {
  background: var(--sand);
  padding: clamp(40px, 6vw, 84px) 0;
}

.page-about .about-eco__head {
  max-width: 46em;
}

.page-about .about-eco__title {
  margin-top: 10px;
  font-size: clamp(26px, 3.4vw, 42px);
  line-height: 1.14;
  color: var(--navy);
}

.page-about .about-eco__lede {
  margin: 16px 0 0;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.8;
  color: rgba(28, 28, 28, 0.82);
}

.page-about .about-eco__grid {
  margin-top: clamp(26px, 4vw, 42px);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

.page-about .about-partners {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-about .about-partner {
  background: var(--warm);
  padding: 18px 18px 20px;
  border-left: 3px solid var(--navy-2);
}

.page-about .about-partner__kicker {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--violet);
}

.page-about .about-partner__title {
  margin: 8px 0 6px;
  font-size: 18px;
  font-weight: 900;
  color: var(--navy);
}

.page-about .about-partner__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(28, 28, 28, 0.8);
}

.page-about .about-credential {
  background: var(--navy-2);
  color: var(--moon);
  padding: 24px 20px 26px;
}

.page-about .about-credential .eyebrow {
  color: var(--cyan);
}

.page-about .about-credential .eyebrow::before {
  background: var(--copper);
}

.page-about .about-credential__num {
  margin: 12px 0 0;
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.04em;
  color: var(--copper);
}

.page-about .about-credential__num .mono {
  font-size: 1em;
  font-weight: 900;
}

.page-about .about-credential__text {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.78;
  color: rgba(247, 243, 232, 0.84);
}

.page-about .about-credential__foot {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--about-line-light);
  font-size: 13px;
  line-height: 1.7;
  color: rgba(247, 243, 232, 0.68);
}

/* ---------- 山东服务 ---------- */
.page-about .about-region {
  padding: clamp(40px, 6vw, 84px) 0;
}

.page-about .about-region__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--about-gap);
}

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

.page-about .about-region__title {
  margin-top: 10px;
  font-size: clamp(26px, 3.2vw, 38px);
  line-height: 1.16;
  color: var(--navy);
}

.page-about .about-region__text {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(28, 28, 28, 0.84);
}

.page-about .about-contact {
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding: 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-contact__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2px;
  padding: 12px 0;
  border-bottom: 1px solid var(--about-line);
}

.page-about .about-contact__k {
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--teal);
}

.page-about .about-contact__v {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--navy);
  word-break: break-word;
}

.page-about .about-region__actions {
  margin-top: clamp(22px, 3vw, 30px);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 媒体查询 ---------- */
@media (min-width: 720px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

  .page-about .about-contact__row {
    grid-template-columns: 120px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }
}

@media (min-width: 920px) {
  .page-about .about-hero__grid {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-about .about-hero__rail {
    flex-direction: column;
    align-items: flex-start;
    gap: 22px;
    padding: 16px 0 0;
    border-left: 0;
    border-top: 2px solid var(--copper);
    position: sticky;
    top: calc(var(--header-h) + 20px);
    align-self: start;
  }

  .page-about .about-hero__rail-note {
    writing-mode: vertical-rl;
    letter-spacing: 0.28em;
    font-size: 11px;
  }

  .page-about .about-timeline__grid {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: clamp(32px, 5vw, 72px);
  }

  .page-about .about-years {
    flex-direction: column;
    gap: 0;
    overflow: visible;
    position: sticky;
    top: calc(var(--header-h) + 26px);
  }

  .page-about .about-years__item {
    background: transparent;
    border: 0;
    border-left: 2px solid var(--sand);
    padding: 0 0 0 12px;
    margin-bottom: 30px;
    font-size: 15px;
    color: var(--navy);
  }

  .page-about .about-years__item:last-child {
    margin-bottom: 0;
    border-left-color: var(--copper);
    color: var(--copper-deep);
  }

  .page-about .about-stage:nth-child(even) {
    margin-left: clamp(0px, 4vw, 56px);
  }

  .page-about .about-team__body {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 52px);
    align-items: start;
  }

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

  .page-about .about-eco__grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: clamp(24px, 3vw, 40px);
    align-items: start;
  }

  .page-about .about-region__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: start;
  }

  .page-about .about-region__media {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }
}

@media (min-width: 1200px) {
  .page-about .about-tree__branches {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-team__body {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.62fr);
  }
}
<<<END>>>