.page-about {
  --about-cut: 18px;
  --about-card-bg: rgba(20, 48, 74, 0.62);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(26px, 5vw, 44px) 0 clamp(38px, 6vw, 72px);
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(120% 96% at 86% -10%, rgba(53, 224, 208, 0.10), transparent 62%),
    radial-gradient(90% 70% at 4% 104%, rgba(255, 107, 74, 0.09), transparent 62%);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(53, 224, 208, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(53, 224, 208, 0.05) 1px, transparent 1px);
  background-size: 92px 92px;
  -webkit-mask-image: radial-gradient(120% 78% at 74% 6%, #000 18%, transparent 74%);
  mask-image: radial-gradient(120% 78% at 74% 6%, #000 18%, transparent 74%);
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
}

.page-about .breadcrumb {
  margin-bottom: clamp(22px, 4vw, 40px);
}

.page-about .about-hero__eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--c-sand);
}

.page-about .about-hero__eyebrow::before {
  content: "";
  display: inline-block;
  width: 34px;
  height: 1px;
  margin-right: 14px;
  vertical-align: middle;
  background: linear-gradient(90deg, var(--c-coral), var(--c-aurora));
}

.page-about .about-hero__title {
  margin: 18px 0 0;
  font-family: var(--font-head);
  font-weight: 200;
  font-size: clamp(31px, 6.4vw, 70px);
  line-height: 1.04;
  letter-spacing: -0.015em;
  color: var(--c-moon);
  max-width: min(100%, 780px);
}

.page-about .about-hero__lede {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: min(100%, 640px);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.9;
  color: var(--c-text);
}

.page-about .about-hero__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: clamp(24px, 4vw, 36px) 0 0;
}

/* ---------- 规模数据带 ---------- */
.page-about .about-metrics {
  background: var(--c-abyss);
  border-bottom: 1px solid var(--line-soft);
  padding: clamp(22px, 3.4vw, 34px) 0;
}

.page-about .about-metrics .data-band {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-about .about-metrics .data-cell {
  background: var(--c-abyss);
  padding: clamp(14px, 2vw, 20px) clamp(14px, 2vw, 20px);
  text-align: left;
  min-width: 0;
}

.page-about .about-metrics .data-cell__label {
  display: block;
  margin-bottom: 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--c-foam);
}

.page-about .about-metrics .data-cell__value {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3.2vw, 36px);
  font-weight: 500;
  line-height: 1;
  color: var(--c-aurora);
  letter-spacing: -0.02em;
}

@media (min-width: 720px) {
  .page-about .about-metrics .data-band {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

/* ---------- 主体骨架 ---------- */
.page-about .about-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: 148px minmax(0, 1fr);
    gap: clamp(30px, 4vw, 64px);
  }
}

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

.page-about .about-section {
  padding-block: clamp(46px, 7vw, 88px);
}

.page-about .about-section + .about-section {
  border-top: 1px solid var(--line-soft);
}

/* ---------- 左侧章节索引 ---------- */
.page-about .toc-rail {
  display: none;
}

@media (min-width: 960px) {
  .page-about .toc-rail {
    display: block;
    position: sticky;
    top: 132px;
    align-self: start;
    padding-top: clamp(48px, 7vw, 88px);
    z-index: 2;
  }

  .page-about .toc-rail::before {
    content: "";
    position: absolute;
    left: 4px;
    top: calc(clamp(48px, 7vw, 88px) + 10px);
    bottom: 10px;
    width: 1px;
    background: linear-gradient(180deg, var(--c-coral), var(--c-aurora) 58%, transparent);
    opacity: 0.32;
  }
}

.page-about .toc-link {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 9px 0 9px 22px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--c-foam);
  text-decoration: none;
  transition: color var(--t);
}

.page-about .toc-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 9px;
  height: 9px;
  transform: translateY(-50%) rotate(45deg);
  background: var(--c-bg);
  border: 1px solid var(--line-soft);
  transition: background var(--t), border-color var(--t), box-shadow var(--t);
}

.page-about .toc-link:hover,
.page-about .toc-link:focus-visible {
  color: var(--c-moon);
}

.page-about .toc-link.is-active {
  color: var(--c-coral);
}

.page-about .toc-link.is-active::before {
  background: var(--c-coral);
  border-color: var(--c-coral);
  box-shadow: 0 0 0 4px rgba(255, 107, 74, 0.16);
}

.page-about .toc-num {
  color: var(--c-sand);
  opacity: 0.75;
}

.page-about .toc-link.is-active .toc-num {
  color: var(--c-coral);
  opacity: 1;
}

/* ---------- 章节头部微调 ---------- */
.page-about .section__head {
  position: relative;
  padding-left: 18px;
  border-left: 2px solid var(--c-glass);
  margin-bottom: clamp(26px, 4vw, 40px);
}

.page-about .section__index {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--c-sand);
}

.page-about .section__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.25;
  letter-spacing: 0.005em;
  color: var(--c-moon);
}

.page-about .section__lead {
  margin: 14px 0 0;
  max-width: min(100%, 620px);
  font-size: 15px;
  line-height: 1.9;
  color: var(--c-text-dim);
}

/* ---------- 媒体框 ---------- */
.page-about .about-figure {
  margin: 0 0 clamp(26px, 4vw, 40px);
}

.page-about .about-figure--team {
  margin-top: clamp(28px, 4vw, 44px);
  margin-bottom: 0;
}

.page-about .media-frame__inner img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-about .media-frame__caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--c-foam);
}

/* ---------- 沿革：年份卡 ---------- */
.page-about .year-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 14px;
}

@media (min-width: 620px) {
  .page-about .year-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1180px) {
  .page-about .year-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .year-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px 26px;
  background: linear-gradient(158deg, var(--about-card-bg), rgba(11, 30, 45, 0.94));
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% 100%, var(--about-cut) 100%, 0 calc(100% - var(--about-cut)));
  transition: transform var(--t), border-color var(--t), box-shadow var(--t);
}

.page-about .year-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 107, 74, 0.5);
  box-shadow: 0 18px 34px -22px rgba(3, 11, 18, 0.9);
}

.page-about .year-card__year {
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.4vw, 38px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--c-aurora);
}

.page-about .year-card__year::before {
  content: "";
  display: block;
  width: 26px;
  height: 2px;
  margin-bottom: 14px;
  background: var(--c-aurora);
  opacity: 0.55;
}

.page-about .year-card--now .year-card__year {
  color: var(--c-coral);
}

.page-about .year-card--now .year-card__year::before {
  background: var(--c-coral);
  opacity: 0.9;
}

.page-about .year-card__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 17px;
  letter-spacing: 0.01em;
  color: var(--c-moon);
}

.page-about .year-card__text {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--c-text-dim);
}

/* ---------- 团队：标签牌矩阵 ---------- */
.page-about .role-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 14px;
}

@media (min-width: 620px) {
  .page-about .role-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1120px) {
  .page-about .role-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .role-plate {
  position: relative;
  height: 100%;
  padding: 20px 18px 24px;
  background: var(--about-card-bg);
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--about-cut)), calc(100% - var(--about-cut)) 100%, 0 100%);
  transition: transform var(--t), box-shadow var(--t);
}

.page-about .role-plate::after {
  content: "";
  position: absolute;
  left: 18px;
  bottom: 0;
  width: 30px;
  height: 2px;
  background: var(--c-aurora);
  transition: width var(--t), background var(--t);
}

.page-about .role-plate:hover,
.page-about .role-plate:focus {
  transform: translateY(-3px);
  box-shadow: inset 0 0 0 1px rgba(255, 107, 74, 0.4);
  outline: none;
}

.page-about .role-plate:hover::after,
.page-about .role-plate:focus::after {
  width: calc(100% - 36px);
  background: var(--c-coral);
}

.page-about .role-plate__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 500;
  line-height: 1;
  color: var(--c-sand);
}

.page-about .role-plate__name {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 17px;
  letter-spacing: 0.02em;
  color: var(--c-moon);
}

.page-about .role-plate__text {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--c-text);
}

.page-about .role-plate__more {
  margin: 0;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  font-size: 12.5px;
  line-height: 1.75;
  color: var(--c-foam);
  transition: max-height var(--t), opacity var(--t), margin-top var(--t);
}

.page-about .role-plate:hover .role-plate__more,
.page-about .role-plate:focus .role-plate__more {
  max-height: 140px;
  opacity: 1;
  margin-top: 10px;
}

/* ---------- 分类：两级索引 ---------- */
.page-about .cat-grid {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 10px;
}

@media (min-width: 560px) {
  .page-about .cat-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1080px) {
  .page-about .cat-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .cat-item {
  background: var(--about-card-bg);
  border: 1px solid var(--line-soft);
  border-left: 2px solid var(--c-glass);
  transition: border-color var(--t), background var(--t);
}

.page-about .cat-item[open] {
  border-left-color: var(--c-coral);
  background: rgba(20, 48, 74, 0.88);
}

.page-about .cat-item__summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: 15px;
  letter-spacing: 0.03em;
  color: var(--c-moon);
}

.page-about .cat-item__summary::-webkit-details-marker {
  display: none;
}

.page-about .cat-item__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--c-foam);
}

.page-about .cat-item[open] .cat-item__summary::after {
  content: "–";
  color: var(--c-coral);
}

.page-about .cat-item__summary:focus-visible {
  outline: 1px solid var(--c-coral);
  outline-offset: -2px;
}

.page-about .cat-item__idx {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--c-sand);
}

.page-about .cat-item__subs {
  list-style: none;
  margin: 0;
  padding: 14px 16px 16px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 9px 12px;
  border-top: 1px solid var(--line-soft);
}

.page-about .cat-item__subs li {
  font-size: 13px;
  line-height: 1.6;
  color: var(--c-text-dim);
}

.page-about .cat-item__subs li::before {
  content: "";
  display: inline-block;
  width: 5px;
  height: 5px;
  margin-right: 8px;
  transform: translateY(-2px) rotate(45deg);
  background: var(--c-aurora);
  opacity: 0.7;
}

.page-about .cat-note {
  margin: clamp(22px, 3vw, 30px) 0 0;
  padding-left: 16px;
  border-left: 1px solid var(--c-glass);
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--c-text-dim);
  max-width: min(100%, 640px);
}

.page-about .cat-note a {
  color: var(--c-coral);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 107, 74, 0.45);
}

.page-about .cat-note a:hover {
  color: var(--c-moon);
}

/* ---------- 海南服务 ---------- */
.page-about .hainan-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 3.4vw, 34px);
  align-items: center;
}

@media (min-width: 900px) {
  .page-about .hainan-grid {
    grid-template-columns: 1.18fr 0.82fr;
    gap: clamp(30px, 4vw, 56px);
  }
}

.page-about .hainan-figure {
  margin: 0;
}

.page-about .svc-list {
  margin: 0;
  border-top: 1px solid var(--line-soft);
}

.page-about .svc-list__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 13px 2px;
  border-bottom: 1px solid var(--line-soft);
}

.page-about .svc-list dt {
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--c-foam);
  white-space: nowrap;
}

.page-about .svc-list dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14.5px;
  color: var(--c-aurora);
  text-align: right;
}

.page-about .hainan-note {
  margin: clamp(24px, 3.6vw, 34px) 0 0;
  padding: 16px 18px;
  background: rgba(6, 18, 28, 0.7);
  border-left: 2px solid var(--c-aurora);
  font-size: 13.5px;
  line-height: 1.9;
  color: var(--c-text);
  max-width: min(100%, 700px);
}

/* ---------- 合作与认可 ---------- */
.page-about .partner-grid {
  display: grid;
  grid-template-columns: repeat(1, minmax(0, 1fr));
  gap: 14px;
}

@media (min-width: 660px) {
  .page-about .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.page-about .partner-card {
  padding: 24px 22px 26px;
  background: linear-gradient(155deg, rgba(20, 48, 74, 0.7), rgba(11, 30, 45, 0.92));
  border: 1px solid var(--line-soft);
  clip-path: polygon(0 0, calc(100% - var(--about-cut)) 0, 100% var(--about-cut), 100% 100%, 0 100%);
  transition: border-color var(--t), transform var(--t);
}

.page-about .partner-card:hover {
  border-color: rgba(53, 224, 208, 0.42);
  transform: translateY(-3px);
}

.page-about .partner-card__label {
  display: inline-block;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--c-sand);
  border: 1px solid rgba(242, 166, 90, 0.4);
}

.page-about .partner-card__num {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(32px, 4.4vw, 46px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--c-aurora);
}

.page-about .partner-card__num em {
  font-style: normal;
  margin-left: 6px;
  font-size: 14px;
  letter-spacing: 0;
  color: var(--c-foam);
}

.page-about .partner-card__award {
  margin: 18px 0 0;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: clamp(19px, 2.4vw, 24px);
  line-height: 1.35;
  color: var(--c-coral);
}

.page-about .partner-card__text {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.88;
  color: var(--c-text-dim);
}

.page-about .partner-card--award {
  border-left: 2px solid rgba(255, 107, 74, 0.6);
}

/* ---------- 下一阶段 ---------- */
.page-about .plan-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--line-soft);
}

@media (min-width: 860px) {
  .page-about .plan-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-top: 0;
    gap: 18px;
  }
}

.page-about .plan-item {
  padding: 20px 0 22px;
  border-bottom: 1px solid var(--line-soft);
}

@media (min-width: 860px) {
  .page-about .plan-item {
    padding: 22px 20px 24px;
    border: 1px solid var(--line-soft);
    border-top: 2px solid var(--c-glass);
    background: rgba(6, 18, 28, 0.5);
    transition: border-top-color var(--t), transform var(--t);
  }

  .page-about .plan-item:hover {
    border-top-color: var(--c-coral);
    transform: translateY(-3px);
  }
}

.page-about .plan-item__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 500;
  font-size: 17px;
  letter-spacing: 0.01em;
  color: var(--c-moon);
}

.page-about .plan-item__text {
  margin: 12px 0 0;
  font-size: 13.5px;
  line-height: 1.88;
  color: var(--c-text-dim);
}

.page-about .next-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 18px;
  margin: clamp(26px, 4vw, 36px) 0 0;
}

.page-about .text-link {
  font-size: 13.5px;
  color: var(--c-aurora);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 224, 208, 0.4);
  transition: color var(--t), border-color var(--t);
}

.page-about .text-link:hover {
  color: var(--c-coral);
  border-color: rgba(255, 107, 74, 0.6);
}

/* ---------- 窄屏收束 ---------- */
@media (max-width: 480px) {
  .page-about .about-hero__links .btn,
  .page-about .next-links .btn {
    flex: 1 1 100%;
    text-align: center;
  }

  .page-about .svc-list__row {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .page-about .svc-list dd {
    text-align: left;
  }

  .page-about .cat-item__subs {
    grid-template-columns: 1fr;
  }
}