.page-about {
  --about-line: rgba(28, 28, 26, .14);
  --about-panel-shadow: 8px 8px 0 rgba(11, 31, 42, .16);
  background: var(--jl-cream);
  color: var(--jl-ink);
  overflow-x: hidden;
}

.page-about .about-crumb {
  padding-top: 16px;
}

/* 首屏 */
.page-about .about-hero {
  padding: 16px 0 40px;
  border-bottom: 1px solid var(--jl-hair);
  background-image:
    linear-gradient(to right, var(--jl-gold-line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--jl-gold-line-soft) 1px, transparent 1px);
  background-size: 68px 68px;
  background-position: center top;
}

.page-about .about-hero__grid {
  display: grid;
  gap: 28px;
}

.page-about .about-hero__title {
  margin: 8px 0 16px;
  font-family: var(--jl-serif);
  font-weight: 900;
  font-size: clamp(34px, 7.4vw, 62px);
  line-height: 1.05;
  letter-spacing: -.01em;
}

.page-about .about-hero__lede {
  margin: 0 0 24px;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--jl-cool);
}

.page-about .about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  margin: 0 0 26px;
  padding: 0;
  border-top: 2px solid var(--jl-navy);
  border-left: 2px solid var(--jl-navy);
}

.page-about .about-hero__stat {
  padding: 10px 12px 12px;
  border-right: 2px solid var(--jl-navy);
  border-bottom: 2px solid var(--jl-navy);
}

.page-about .about-hero__stat dt {
  margin: 0;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--jl-cool);
}

.page-about .about-hero__stat dd {
  margin: 6px 0 0;
  font-family: var(--jl-serif);
  font-weight: 700;
  color: var(--jl-navy);
  line-height: 1;
}

.page-about .about-hero__num {
  font-size: 30px;
  font-variant-numeric: tabular-nums;
}

.page-about .about-hero__unit {
  margin-left: 4px;
  font-size: 13px;
  font-weight: 400;
  color: var(--jl-cool);
}

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

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

.page-about .about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 2px solid var(--jl-navy);
  box-shadow: var(--about-panel-shadow);
  background: var(--jl-stone);
  filter: saturate(.82) contrast(.96);
}

/* 双栏主体 */
.page-about .about-body {
  display: grid;
  gap: 8px;
  padding: 20px 0 56px;
}

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

/* 侧边章节导航 */
.page-about .about-rail {
  padding: 14px 0 20px;
  border-top: 2px solid var(--jl-navy);
}

.page-about .about-rail__title {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--jl-cool);
}

.page-about .about-rail__list {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-rail__link {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 10px;
  border-left: 3px solid transparent;
  color: var(--jl-ink);
  font-size: 14px;
  text-decoration: none;
  transition: background .2s var(--jl-ease), border-color .2s var(--jl-ease);
}

.page-about .about-rail__no {
  font-size: 12px;
  color: var(--jl-gold);
}

.page-about .about-rail__link:hover,
.page-about .about-rail__link:focus-visible {
  background: var(--jl-gold-soft);
  border-left-color: var(--jl-gold);
  outline: none;
}

.page-about .about-rail__note {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--about-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--jl-cool);
}

/* 章节 */
.page-about .about-sec {
  padding: 32px 0;
  border-top: 1px solid var(--about-line);
}

.page-about .about-sec:first-child {
  border-top: 0;
  padding-top: 8px;
}

.page-about .about-sec__title {
  margin: 12px 0 12px;
  font-family: var(--jl-serif);
  font-weight: 800;
  font-size: clamp(24px, 4.4vw, 36px);
  line-height: 1.22;
  letter-spacing: -.01em;
}

.page-about .about-sec__lede {
  margin: 0 0 24px;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--jl-cool);
}

.page-about .about-link {
  color: var(--jl-clay-ink);
  text-decoration: underline;
  text-decoration-color: var(--jl-gold);
  text-underline-offset: 3px;
}

.page-about .about-link:hover,
.page-about .about-link:focus-visible {
  color: var(--jl-navy);
  outline: none;
}

/* 01 职能条形 */
.page-about .about-roles {
  display: grid;
  gap: 14px;
}

.page-about .about-role {
  padding: 14px 16px 16px;
  background: #fff;
  border: 2px solid var(--jl-navy);
  box-shadow: var(--jl-shadow);
  transition: background .2s var(--jl-ease), transform .2s var(--jl-ease);
}

.page-about .about-role:hover {
  background: var(--jl-gold-soft);
  transform: translate(-2px, -2px);
}

.page-about .about-role__top {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 10px;
}

.page-about .about-role__name {
  margin: 0;
  font-family: var(--jl-serif);
  font-size: 19px;
  font-weight: 700;
  color: var(--jl-navy);
}

.page-about .about-role__pct {
  font-size: 13px;
  color: var(--jl-moss-ink);
}

.page-about .about-role__count {
  margin-left: auto;
  font-size: 15px;
  color: var(--jl-ink);
}

.page-about .about-role__track {
  height: 10px;
  background: var(--jl-stone);
  border: 1px solid var(--about-line);
}

.page-about .about-role__bar {
  display: block;
  height: 100%;
  width: 0;
  background: var(--jl-navy);
  transition: width .5s var(--jl-ease), background .2s var(--jl-ease);
}

.page-about .about-role:hover .about-role__bar {
  background: var(--jl-gold);
}

.page-about .about-role[data-role="plan"] .about-role__bar { width: 26%; }
.page-about .about-role[data-role="design"] .about-role__bar { width: 33%; }
.page-about .about-role[data-role="ops"] .about-role__bar { width: 20%; }
.page-about .about-role[data-role="success"] .about-role__bar { width: 22%; }

.page-about .about-role__desc {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--jl-cool);
}

/* 02 交付方法 */
.page-about .about-method {
  margin: 8px 0;
  padding: 26px 20px 28px;
  background: var(--jl-navy);
  color: var(--jl-cream);
  border: 2px solid var(--jl-navy);
  box-shadow: var(--about-panel-shadow);
}

.page-about .about-method .jl-plate__no {
  color: var(--jl-gold);
}

.page-about .about-method .jl-plate__label {
  color: var(--jl-gold-soft);
}

.page-about .about-method .about-sec__title {
  color: var(--jl-cream);
}

.page-about .about-method .about-sec__lede {
  color: rgba(244, 241, 234, .78);
}

.page-about .about-method__grid {
  display: grid;
  gap: 24px;
}

.page-about .about-method__steps .jl-accordion__item {
  margin-bottom: 10px;
  background: var(--jl-navy-2);
  border: 1px solid var(--jl-cream-line);
}

.page-about .about-method__steps .jl-accordion__item.is-open {
  border-color: var(--jl-gold-line);
}

.page-about .about-method__steps .jl-accordion__trigger {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  width: 100%;
  padding: 14px 16px;
  background: transparent;
  border: 0;
  color: var(--jl-cream);
  font-family: var(--jl-serif);
  font-size: 16px;
  font-weight: 700;
  text-align: left;
  cursor: pointer;
}

.page-about .about-method__steps .jl-accordion__trigger:focus-visible {
  outline: 2px solid var(--jl-gold-soft);
  outline-offset: -3px;
}

.page-about .about-step-no {
  font-size: 12px;
  color: var(--jl-gold);
}

.page-about .about-step-name {
  flex: 1 1 auto;
}

.page-about .about-step-time {
  font-family: var(--jl-sans);
  font-size: 12px;
  font-weight: 400;
  color: var(--jl-gold-soft);
  letter-spacing: .04em;
}

.page-about .about-method__steps .jl-accordion__inner {
  padding: 0 16px 16px;
}

.page-about .about-step-facts {
  margin: 0;
  display: grid;
  gap: 4px;
}

.page-about .about-step-facts dt {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--jl-gold-soft);
}

.page-about .about-step-facts dd {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 241, 234, .86);
}

.page-about .about-step-facts dd:last-child {
  margin-bottom: 0;
}

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

.page-about .about-method__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border: 2px solid var(--jl-gold-line);
  background: var(--jl-navy-2);
  filter: saturate(.78) contrast(.96);
}

.page-about .about-method__figure .jl-media__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.6;
  color: rgba(244, 241, 234, .66);
}

/* 03 时间线 */
.page-about .about-tl {
  margin: 0;
  padding: 4px 0 0 22px;
  list-style: none;
  border-left: 2px solid var(--jl-gold-line);
}

.page-about .about-tl__item {
  position: relative;
  padding: 0 0 26px 6px;
}

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

.page-about .about-tl__dot {
  position: absolute;
  left: -29px;
  top: 5px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--jl-cream);
  border: 2px solid var(--jl-gold);
}

.page-about .about-tl__step {
  margin: 0 0 4px;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--jl-clay-ink);
}

.page-about .about-tl__title {
  margin: 0 0 6px;
  font-family: var(--jl-serif);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--jl-navy);
}

.page-about .about-tl__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--jl-cool);
}

/* 04 服务覆盖 */
.page-about .about-coverage {
  padding: 26px 20px 28px;
  background: var(--jl-stone);
  border: 2px solid var(--jl-navy);
  box-shadow: var(--jl-shadow);
}

.page-about .about-coverage__grid {
  display: grid;
  gap: 24px;
}

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

.page-about .about-map__svg {
  display: block;
  width: 100%;
  height: auto;
  max-width: 420px;
  margin: 0 auto;
  background: var(--jl-cream);
  border: 2px solid var(--jl-navy);
}

.page-about .about-map__spot circle {
  fill: var(--jl-gold);
  stroke: var(--jl-navy);
  stroke-width: 2;
  transition: fill .2s var(--jl-ease), r .2s var(--jl-ease);
}

.page-about .about-map__spot:hover circle,
.page-about .about-map__spot:focus circle {
  fill: var(--jl-clay);
}

.page-about .about-map__spot:focus {
  outline: none;
}

.page-about .about-map__tip {
  opacity: 0;
  font-family: var(--jl-sans);
  font-size: 11px;
  fill: var(--jl-navy);
  transition: opacity .2s var(--jl-ease);
  pointer-events: none;
}

.page-about .about-map__spot:hover .about-map__tip,
.page-about .about-map__spot:focus .about-map__tip {
  opacity: 1;
}

.page-about .about-map__caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--jl-cool);
  text-align: center;
}

.page-about .about-coverage__title {
  margin: 0 0 10px;
  font-family: var(--jl-serif);
  font-size: 17px;
  font-weight: 700;
  color: var(--jl-navy);
}

.page-about .about-coverage__title + .about-coverage__list {
  margin-bottom: 22px;
}

.page-about .about-coverage__list {
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--about-line);
}

.page-about .about-coverage__list li {
  padding: 9px 0;
  border-bottom: 1px solid var(--about-line);
  font-size: 14px;
  line-height: 1.7;
  color: var(--jl-cool);
}

.page-about .about-coverage__list strong {
  display: inline-block;
  min-width: 6.5em;
  margin-right: 8px;
  font-family: var(--jl-serif);
  font-weight: 700;
  color: var(--jl-ink);
}

.page-about .about-coverage__text {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--jl-cool);
}

/* 05 认证与带教 */
.page-about .about-training__grid {
  display: grid;
  gap: 24px;
}

.page-about .about-certs {
  margin: 0 0 20px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-about .about-certs__item {
  padding: 14px 16px;
  background: #fff;
  border: 2px solid var(--jl-navy);
  border-left-width: 8px;
  box-shadow: var(--jl-shadow);
}

.page-about .about-certs__badge {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 8px;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--jl-navy);
  background: var(--jl-gold-soft);
  border: 1px solid var(--jl-gold-line);
}

.page-about .about-certs__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--jl-cool);
}

.page-about .about-training__text {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--jl-cool);
}

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

.page-about .about-training__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 2px solid var(--jl-navy);
  box-shadow: var(--jl-shadow);
  background: var(--jl-stone);
  filter: saturate(.8) contrast(.96);
}

/* 结尾 */
.page-about .about-outro {
  margin-top: 8px;
  padding: 26px 20px 28px;
  background: var(--jl-navy-2);
  color: var(--jl-cream);
  border: 2px solid var(--jl-navy);
  box-shadow: var(--about-panel-shadow);
}

.page-about .about-outro__title {
  margin: 0 0 12px;
  font-family: var(--jl-serif);
  font-size: clamp(22px, 4vw, 30px);
  font-weight: 800;
  line-height: 1.28;
}

.page-about .about-outro__text {
  margin: 0 0 20px;
  max-width: 58ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 241, 234, .8);
}

.page-about .about-outro__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}

.page-about .about-outro__link {
  color: var(--jl-gold-soft);
  font-size: 14px;
  text-decoration: underline;
  text-decoration-color: var(--jl-gold-line);
  text-underline-offset: 4px;
}

.page-about .about-outro__link:hover,
.page-about .about-outro__link:focus-visible {
  color: var(--jl-gold);
  outline: none;
}

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

  .page-about .about-roles {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .about-coverage__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 28px;
  }

  .page-about .about-training__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: start;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: 24px 0 52px;
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 48px;
    align-items: center;
  }

  .page-about .about-body {
    grid-template-columns: 196px minmax(0, 1fr);
    gap: 48px;
    align-items: start;
    padding: 28px 0 72px;
  }

  .page-about .about-rail {
    position: sticky;
    top: 24px;
    padding-top: 16px;
  }

  .page-about .about-sec {
    padding: 40px 0;
  }

  .page-about .about-method,
  .page-about .about-coverage,
  .page-about .about-outro {
    padding: 34px 32px 36px;
  }

  .page-about .about-method__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 28px;
    align-items: start;
  }

  .page-about .about-tl {
    padding-left: 26px;
  }

  .page-about .about-tl__dot {
    left: -33px;
  }
}

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

  .page-about .about-role {
    display: flex;
    flex-direction: column;
  }

  .page-about .about-role__desc {
    margin-top: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-role,
  .page-about .about-role__bar,
  .page-about .about-rail__link,
  .page-about .about-map__tip {
    transition: none;
  }

  .page-about .about-role:hover {
    transform: none;
  }
}
<<<END>>>