/* ================= 关于PG主站 · 页面专属样式 ================= */
.page-about {
  --about-rule: rgba(143, 168, 161, .16);
  --about-rule-strong: rgba(122, 90, 24, .5);
  --about-glow: rgba(0, 229, 195, .10);
  --about-panel: rgba(22, 53, 46, .55);
  --about-amber-soft: rgba(255, 176, 32, .14);
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumb {
  padding: 26px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--sage);
}
.page-about .breadcrumb a {
  color: var(--sage);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .25s var(--ease), border-color .25s var(--ease);
}
.page-about .breadcrumb a:hover {
  color: var(--cyan);
  border-bottom-color: var(--line-cyan);
}
.page-about .breadcrumb__sep {
  margin: 0 8px;
  color: var(--gold-dark);
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--mist-80);
}

/* ---------- 首屏：分屏叙事 ---------- */
.page-about .about-hero {
  padding-top: clamp(26px, 4.5vw, 54px);
  position: relative;
}
.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -10% 55% 40% -20%;
  background: radial-gradient(60% 60% at 30% 30%, var(--about-glow), transparent 70%);
  pointer-events: none;
  z-index: 0;
}
.page-about .about-hero .container {
  position: relative;
  z-index: 1;
}
.page-about .about-hero__grid {
  display: grid;
  gap: clamp(30px, 5vw, 60px);
  align-items: start;
}
.page-about .about-hero h1 {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(29px, 5vw, 52px);
  line-height: 1.14;
  letter-spacing: -.012em;
  color: var(--mist);
  max-width: 16em;
}
.page-about .about-hero .lede {
  margin: 20px 0 0;
  max-width: 40em;
  font-size: clamp(16px, 1.6vw, 18px);
  line-height: 1.85;
  color: var(--mist-80);
}
@media (min-width: 920px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, .85fr);
    gap: clamp(40px, 6vw, 84px);
  }
}

/* 数据条 */
.page-about .factbar {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-top: clamp(28px, 4vw, 40px);
  background: var(--about-rule);
  border-top: 1px solid var(--about-rule);
  border-bottom: 1px solid var(--about-rule);
}
.page-about .factbar__item {
  background: var(--ink);
  padding: 16px 14px 18px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.page-about .factbar__num {
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 700;
  color: var(--amber);
  letter-spacing: .02em;
}
.page-about .factbar__label {
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--sage);
}
@media (min-width: 640px) {
  .page-about .factbar {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* 窄栏注释 */
.page-about .about-hero__aside {
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.page-about .about-note {
  margin: 0;
  padding-left: 16px;
  border-left: 2px solid var(--line-cyan);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.95;
  letter-spacing: .02em;
  color: var(--sage);
}

/* 图片统一响应式 */
.page-about .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ---------- 发展历程 ---------- */
.page-about .section-head .lede {
  max-width: 46em;
}
.page-about .history-grid {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
  margin-top: clamp(30px, 4.5vw, 52px);
}
@media (min-width: 980px) {
  .page-about .history-grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: start;
  }
}
.page-about .timeline {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-about .timeline__item {
  position: relative;
  padding: 0 0 clamp(22px, 3vw, 30px) 24px;
  margin-left: 5px;
  border-left: 1px solid var(--about-rule);
}
.page-about .timeline__item:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}
.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: -5px;
  top: 6px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--ink);
  border: 1px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(0, 229, 195, .08);
  transition: box-shadow .3s var(--ease), background-color .3s var(--ease);
}
.page-about .timeline__item:hover::before,
.page-about .timeline__item:focus-within::before {
  background: var(--cyan);
  box-shadow: 0 0 0 6px rgba(0, 229, 195, .14);
}
.page-about .timeline__year {
  display: block;
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--amber);
}
.page-about .timeline__body {
  margin-top: 4px;
}
.page-about .timeline__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(16px, 1.8vw, 19px);
  line-height: 1.5;
  color: var(--mist);
}
.page-about .timeline__text {
  margin: 8px 0 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist-60);
}
.page-about .timeline__more {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--sage);
  border-left: 2px solid transparent;
  padding-left: 0;
  transition: max-height .4s var(--ease), opacity .3s var(--ease), padding-left .3s var(--ease), border-color .3s var(--ease);
}
.page-about .timeline__item:hover .timeline__more,
.page-about .timeline__item:focus-within .timeline__more {
  max-height: 12em;
  opacity: 1;
  margin-top: 10px;
  padding-left: 12px;
  border-left-color: var(--about-rule-strong);
}
@media (hover: none) {
  .page-about .timeline__more {
    max-height: 12em;
    opacity: 1;
    margin-top: 10px;
    padding-left: 12px;
    border-left-color: var(--about-rule-strong);
  }
}
.page-about .history-figure {
  border: 1px solid var(--about-rule);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-green-2);
}
.page-about .history-figure .media-frame__caption {
  padding: 12px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--sage);
  border-top: 1px solid var(--about-rule);
}
@media (min-width: 980px) {
  .page-about .history-figure {
    position: sticky;
    top: calc(var(--main-top) + 24px);
  }
}

/* ---------- 整理方法 ---------- */
.page-about .method-grid {
  display: grid;
  gap: clamp(30px, 5vw, 54px);
  margin-top: clamp(30px, 4.5vw, 52px);
  align-items: start;
}
@media (min-width: 980px) {
  .page-about .method-grid {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.18fr);
    gap: clamp(36px, 5vw, 72px);
  }
}
.page-about .method-figure {
  border: 1px solid var(--about-rule);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(160deg, var(--ink-green-2), var(--ink));
}
.page-about .method-caption {
  margin: 14px 0 0;
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--sage);
  line-height: 1.9;
}

/* 折叠工序 */
.page-about .accordion__trigger {
  display: flex;
  align-items: baseline;
  gap: 14px;
  width: 100%;
  text-align: left;
}
.page-about .step-no {
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--amber);
}
.page-about .step-name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(15px, 1.7vw, 17px);
  color: var(--mist);
}
.page-about .accordion__trigger[aria-expanded="true"] .step-name {
  color: var(--cyan);
}
.page-about .accordion__panel-inner p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist-60);
}

/* ---------- 团队构成 ---------- */
.page-about .about-tabs {
  margin-top: clamp(26px, 4vw, 40px);
}
.page-about .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--about-rule);
}
.page-about .tabs__btn {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  padding: 9px 16px;
  border: 1px solid var(--about-rule);
  border-radius: 999px;
  background: transparent;
  color: var(--sage);
  cursor: pointer;
  transition: color .28s var(--ease), background-color .28s var(--ease), border-color .28s var(--ease);
}
.page-about .tabs__btn:hover {
  color: var(--mist);
  border-color: var(--line-cyan);
}
.page-about .tabs__btn[aria-selected="true"] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}
.page-about .tabs__btn:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 3px;
}
.page-about .tabs__panel {
  padding-top: clamp(22px, 3vw, 34px);
}
.page-about .team-panel {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--about-rule);
  border-left: 3px solid var(--gold-dark);
  border-radius: var(--radius);
  background: var(--about-panel);
}
@media (min-width: 860px) {
  .page-about .team-panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: clamp(24px, 4vw, 48px);
  }
}
.page-about .team-panel__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(17px, 2vw, 21px);
  color: var(--cyan);
  letter-spacing: .01em;
}
.page-about .team-panel__text {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist-60);
}
.page-about .team-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-about .team-list li {
  position: relative;
  padding-left: 22px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--mist-80);
}
.page-about .team-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 12px;
  height: 2px;
  background: var(--amber);
}

/* 协作生态 */
.page-about .about-eco {
  margin-top: clamp(28px, 4vw, 44px);
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--about-rule-strong);
  border-radius: var(--radius);
  background: linear-gradient(115deg, rgba(22, 53, 46, .8), rgba(11, 15, 14, .45));
}
.page-about .about-eco__title {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(18px, 2.2vw, 24px);
  line-height: 1.45;
  color: var(--mist);
}
.page-about .about-eco__text {
  margin: 14px 0 0;
  max-width: 52em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist-60);
}

/* ---------- 更新节奏 ---------- */
.page-about .cadence {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
}
.page-about .cadence__item {
  display: grid;
  gap: 8px;
  padding: clamp(18px, 2.6vw, 26px) 0;
  border-top: 1px solid var(--about-rule);
}
.page-about .cadence__item:last-child {
  border-bottom: 1px solid var(--about-rule);
}
.page-about .cadence__cycle {
  font-size: 13px;
  letter-spacing: .12em;
  color: var(--cyan);
}
.page-about .cadence__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(16px, 1.8vw, 19px);
  color: var(--mist);
}
.page-about .cadence__text {
  margin: 8px 0 0;
  max-width: 52em;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--mist-60);
}
@media (min-width: 760px) {
  .page-about .cadence__item {
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 10px 32px;
    align-items: baseline;
  }
  .page-about .cadence__cycle {
    padding-top: 2px;
  }
}

/* ---------- 服务范围 ---------- */
.page-about .support-grid {
  display: grid;
  gap: clamp(28px, 4.5vw, 56px);
  align-items: start;
}
@media (min-width: 940px) {
  .page-about .support-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    gap: clamp(40px, 5vw, 76px);
  }
}
.page-about .support-text {
  margin: 18px 0 0;
  max-width: 44em;
  font-size: 15.5px;
  line-height: 1.9;
  color: var(--mist-60);
}
.page-about .support-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}
.page-about .support-aside {
  display: grid;
  gap: 10px;
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--about-rule);
  border-radius: var(--radius);
  background: var(--ink-green-2);
}
.page-about .support-aside__label {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--sage);
}
.page-about .support-link {
  display: block;
  padding: 14px 16px 14px 18px;
  border-left: 2px solid var(--about-rule-strong);
  text-decoration: none;
  transition: border-color .28s var(--ease), background-color .28s var(--ease), transform .28s var(--ease);
}
.page-about .support-link:hover {
  border-left-color: var(--cyan);
  background: rgba(0, 229, 195, .06);
  transform: translateX(3px);
}
.page-about .support-link__title {
  display: block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 15.5px;
  color: var(--mist);
}
.page-about .support-link__desc {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--sage);
}

/* ---------- 结尾引导 ---------- */
.page-about .about-cta__inner {
  position: relative;
  padding: clamp(28px, 4.5vw, 52px);
  border: 1px solid var(--about-rule);
  border-radius: var(--radius);
  background: linear-gradient(120deg, rgba(16, 35, 31, .95), rgba(11, 15, 14, .85));
  overflow: hidden;
}
.page-about .about-cta__inner::after {
  content: "";
  position: absolute;
  right: -8%;
  top: -40%;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 176, 32, .14), transparent 68%);
  pointer-events: none;
}
.page-about .about-cta__title {
  position: relative;
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(20px, 3vw, 32px);
  line-height: 1.35;
  color: var(--mist);
}
.page-about .about-cta__text {
  position: relative;
  margin: 16px 0 0;
  max-width: 48em;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--mist-60);
}
.page-about .about-cta__actions {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 32px);
}

/* ---------- 小屏兜底 ---------- */
@media (max-width: 480px) {
  .page-about .factbar {
    grid-template-columns: minmax(0, 1fr);
  }
  .page-about .support-actions .btn,
  .page-about .about-cta__actions .btn {
    flex: 1 1 100%;
    text-align: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .timeline__more,
  .page-about .timeline__item::before,
  .page-about .tabs__btn,
  .page-about .support-link {
    transition: none;
  }
}
<<<END>>>