.page-about {
  --about-block-pad: clamp(26px, 4vw, 54px);
  --about-rail-w: 210px;
  background: var(--deep);
  color: #E6EFF5;
  padding-bottom: clamp(48px, 7vw, 96px);
  overflow-wrap: break-word;
}

.page-about [id] {
  scroll-margin-top: calc(var(--header-h) + 26px);
}

.page-about [data-filter-item][hidden] {
  display: none;
}

.page-about .breadcrumb {
  padding-top: calc(var(--header-h) + 20px);
  margin-bottom: clamp(14px, 2vw, 24px);
}

.page-about .breadcrumb__link,
.page-about .breadcrumb__current {
  color: var(--mist);
}

.page-about .breadcrumb__link:hover,
.page-about .breadcrumb__link:focus-visible {
  color: var(--lime);
}

/* ---------- 首屏 ---------- */
.about-hero {
  padding: clamp(10px, 2vw, 26px) 0 clamp(40px, 6vw, 82px);
}

.about-hero__inner {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  align-items: end;
}

@media (min-width: 920px) {
  .about-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(32px, 4vw, 64px);
  }
}

.about-hero__title {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 8.2vw, 92px);
  line-height: 0.96;
  letter-spacing: -0.02em;
  margin: 10px 0 22px;
  color: #FFFFFF;
}

.about-hero__title-line {
  display: block;
}

.about-hero__title-line--lime {
  color: var(--lime);
}

.about-hero__lede {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.78;
  color: #C3D3DE;
  max-width: 42ch;
  margin: 0;
}

.about-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(18px, 3vw, 44px);
  margin-top: clamp(26px, 3.4vw, 42px);
  padding-top: 22px;
  border-top: 1px solid var(--hair);
}

.about-fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.about-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 4.4vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--lime);
}

.about-fact__cap {
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--mist);
}

.about-hero__figure {
  margin: 0;
  position: relative;
}

.about-hero__img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  display: block;
  border-radius: var(--r-l);
  box-shadow: var(--shadow);
}

.about-hero__figure .media__cap {
  display: block;
  margin-top: 12px;
  font-size: 12px;
  color: var(--mist);
  line-height: 1.6;
}

/* ---------- 走廊布局 ---------- */
.about-journey {
  display: block;
}

@media (min-width: 1020px) {
  .about-journey {
    display: grid;
    grid-template-columns: var(--about-rail-w) minmax(0, 1fr);
    gap: clamp(30px, 4vw, 62px);
    align-items: start;
  }
}

.about-rail {
  margin-bottom: clamp(24px, 3vw, 38px);
}

@media (min-width: 1020px) {
  .about-rail {
    position: sticky;
    top: calc(var(--header-h) + 32px);
    margin-bottom: 0;
  }
}

.about-rail__title {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--mist);
  margin: 0 0 12px;
}

.about-rail__list {
  list-style: none;
  margin: 0;
  padding: 0 0 8px;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

.about-rail__list::-webkit-scrollbar {
  display: none;
}

@media (min-width: 1020px) {
  .about-rail__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding-bottom: 0;
  }
}

.about-rail__item {
  flex: 0 0 auto;
}

@media (min-width: 1020px) {
  .about-rail__item {
    flex: 0 0 auto;
    width: 100%;
  }
}

.about-rail__link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 15px;
  border-radius: 999px;
  border: 1px solid rgba(126, 147, 166, 0.24);
  color: var(--mist);
  text-decoration: none;
  font-size: 13px;
  white-space: nowrap;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease), background 0.22s var(--ease);
}

@media (min-width: 1020px) {
  .about-rail__link {
    border-radius: var(--r-s);
    border: 0;
    border-left: 2px solid var(--hair);
    padding: 10px 12px 10px 16px;
  }
}

.about-rail__link:hover,
.about-rail__link:focus-visible {
  color: var(--lime);
  border-color: var(--lime);
  background: rgba(184, 241, 53, 0.07);
}

.about-rail__idx {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--coral);
}

.about-journey__main {
  min-width: 0;
}

/* ---------- 通用区块 ---------- */
.about-block {
  position: relative;
  padding: var(--about-block-pad);
  border-radius: var(--r-l);
  margin-bottom: clamp(26px, 3.6vw, 52px);
}

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

.about-block--deep {
  background: linear-gradient(164deg, var(--deep-2) 0%, #0A2136 58%, #081B2E 100%);
  border: 1px solid var(--hair);
  color: #C3D3DE;
}

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

.about-block--slash::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: linear-gradient(112deg, transparent 62%, rgba(184, 241, 53, 0.06) 62%, rgba(184, 241, 53, 0.06) 100%);
}

.about-block h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 3.4vw, 40px);
  line-height: 1.14;
  letter-spacing: -0.012em;
  margin: 0 0 18px;
}

.about-block--deep h2 {
  color: #FFFFFF;
}

.about-block--paper h2 {
  color: var(--ink);
}

.about-block p {
  font-size: clamp(14.5px, 1.4vw, 16px);
  line-height: 1.8;
  margin: 0 0 14px;
  max-width: 62ch;
}

.about-block--deep p {
  color: #C3D3DE;
}

.about-block--paper p {
  color: #2A455C;
}

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

.page-about .eyebrow {
  margin-bottom: 12px;
}

.about-eyebrow--ink {
  color: #5C7488;
}

/* ---------- 读数条 ---------- */
.about-readout {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

@media (min-width: 700px) {
  .about-readout {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
  }
}

.about-readout__item {
  border-radius: var(--r-m);
  padding: 18px 18px 20px;
  background: rgba(4, 18, 31, 0.42);
  border: 1px solid var(--hair);
  border-top: 3px solid var(--lime);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.about-readout__item--coral {
  border-top-color: var(--coral);
}

.about-readout__item--gold {
  border-top-color: var(--gold);
}

.about-readout__val {
  font-family: var(--font-mono);
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: #FFFFFF;
}

.about-readout__cap {
  font-size: 13px;
  line-height: 1.68;
  color: var(--mist);
}

/* ---------- 阶段筛选 ---------- */
.about-filter {
  display: flex;
  flex-wrap: nowrap;
  gap: 6px;
  margin: clamp(20px, 2.6vw, 30px) 0 24px;
  padding: 6px;
  background: var(--deep);
  border-radius: 999px;
  overflow-x: auto;
  scrollbar-width: none;
  max-width: 100%;
}

.about-filter::-webkit-scrollbar {
  display: none;
}

.about-filter .filter-btn {
  flex: 0 0 auto;
  white-space: nowrap;
}

.about-stages {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

@media (min-width: 720px) {
  .about-stages {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.about-stage {
  background: #FFFFFF;
  border: 1px solid rgba(7, 26, 43, 0.1);
  border-left: 4px solid var(--turf);
  border-radius: var(--r-m);
  padding: 22px 20px 24px;
  transition: transform 0.24s var(--ease), box-shadow 0.24s var(--ease), border-color 0.24s var(--ease);
}

.about-stage:hover {
  transform: translateY(-4px);
  box-shadow: 0 26px 44px -34px rgba(4, 18, 31, 0.7);
}

.about-stage__phase {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  padding: 4px 11px;
  border-radius: 999px;
  background: var(--lime-mist);
  color: var(--deep);
  margin-bottom: 14px;
}

.about-stage h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(17px, 1.7vw, 20px);
  line-height: 1.3;
  color: var(--ink);
  margin: 0 0 10px;
}

.about-stage p {
  font-size: 14px;
  line-height: 1.78;
  color: #3D5A72;
  margin: 0 0 14px;
}

.about-stage__meta {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin: 0;
  font-size: 12.5px;
  color: #61798F;
}

.about-stage__num {
  font-family: var(--font-mono);
  font-size: 21px;
  font-weight: 700;
  color: var(--turf);
  line-height: 1;
}

/* ---------- 折叠面板 ---------- */
.about-panels {
  margin-top: clamp(22px, 3vw, 34px);
  display: grid;
  gap: 10px;
}

.about-panels .panel {
  border-radius: var(--r-m);
  border: 1px solid rgba(7, 26, 43, 0.12);
  background: #FFFFFF;
  overflow: hidden;
}

.about-panels .panel__head {
  width: 100%;
  text-align: left;
  font-family: var(--font-body);
  font-size: 14.5px;
  font-weight: 600;
  color: var(--ink);
  background: transparent;
  border: 0;
  padding: 16px 18px;
  cursor: pointer;
  position: relative;
  padding-right: 46px;
}

.about-panels .panel__head::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--coral);
}

.about-panels .panel[data-open] .panel__head::after {
  content: "−";
}

.about-panels .panel__body {
  padding: 0 18px 18px;
}

.about-panels .panel__body p {
  font-size: 14px;
  line-height: 1.78;
  color: #3D5A72;
  margin: 0;
  max-width: 64ch;
}

.about-panels .panel:not([data-open]) .panel__body {
  display: none;
}

/* ---------- 点球脉络 ---------- */
.about-split {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
  align-items: start;
}

@media (min-width: 880px) {
  .about-split {
    grid-template-columns: minmax(0, 6fr) minmax(0, 4fr);
  }
}

.about-split__media {
  margin: 0;
}

.about-split__media img {
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
  display: block;
  border-radius: var(--r-m);
}

.about-split__media .media__cap {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  color: var(--mist);
}

.about-fields {
  list-style: none;
  margin: clamp(20px, 2.6vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.about-fields__item {
  display: grid;
  gap: 4px;
  padding: 14px 16px;
  border-radius: var(--r-s);
  background: rgba(184, 241, 53, 0.06);
  border-left: 3px solid var(--lime);
}

.about-fields__name {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 15px;
  color: #FFFFFF;
  letter-spacing: 0.01em;
}

.about-fields__note {
  font-size: 13px;
  line-height: 1.68;
  color: var(--mist);
}

.about-chart {
  margin-top: clamp(28px, 3.6vw, 46px);
  padding-top: clamp(20px, 2.6vw, 30px);
  border-top: 1px solid var(--hair);
}

.about-chart__cap {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--lime);
  margin: 0 0 10px;
}

.pen-chart {
  width: 100%;
  height: auto;
  display: block;
}

.pen-chart__grid line {
  stroke: rgba(126, 147, 166, 0.22);
  stroke-width: 1;
}

.pen-bar {
  fill: rgba(184, 241, 53, 0.32);
  transition: fill 0.22s var(--ease);
}

.pen-bar:hover {
  fill: var(--lime);
}

.pen-bar--peak {
  fill: var(--coral);
}

.pen-bar--peak:hover {
  fill: #FF8A6F;
}

.pen-chart__labels text {
  fill: var(--mist);
  font-family: var(--font-mono);
  font-size: 13px;
}

.about-chart__note {
  margin: 12px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--mist);
  max-width: 62ch;
}

/* ---------- 团队 ---------- */
.about-team__top {
  display: grid;
  gap: clamp(22px, 3.2vw, 40px);
  align-items: start;
}

@media (min-width: 860px) {
  .about-team__top {
    grid-template-columns: minmax(0, 11fr) minmax(0, 9fr);
  }
}

.about-team__figure {
  margin: 0;
}

.about-team__figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 9 / 7;
  object-fit: cover;
  display: block;
  border-radius: var(--r-m);
}

.about-team__figure .media__cap {
  display: block;
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.6;
  color: #61798F;
}

.team-tree {
  list-style: none;
  margin: clamp(24px, 3vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

@media (min-width: 780px) {
  .team-tree {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
  }
}

.team-tree__item {
  position: relative;
}

@media (min-width: 780px) {
  .team-tree__item:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 46px;
    right: -16px;
    width: 16px;
    height: 2px;
    background: linear-gradient(90deg, var(--lime), var(--coral));
    z-index: 2;
  }
}

.team-tree__node {
  height: 100%;
  border-radius: var(--r-m);
  padding: 20px 18px 22px;
  background: #0C2338;
  border: 1px solid rgba(7, 26, 43, 0.16);
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease);
}

.team-tree__node:hover {
  transform: translateY(-4px);
  border-color: var(--coral);
}

.team-tree__step {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--lime);
  margin-bottom: 10px;
}

.team-tree__node h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 16.5px;
  color: #FFFFFF;
  margin: 0 0 8px;
}

.team-tree__node p {
  font-size: 13px;
  line-height: 1.72;
  color: #9FB4C6;
  margin: 0;
  max-width: none;
}

/* ---------- 内容体系 ---------- */
.data-grid {
  list-style: none;
  margin: clamp(20px, 2.8vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

@media (min-width: 640px) {
  .data-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

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

.data-card {
  border-radius: var(--r-m);
  padding: 20px 19px 22px;
  background: rgba(14, 42, 68, 0.72);
  border: 1px solid var(--hair);
  border-top: 3px solid var(--lime);
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease);
}

.data-card:nth-child(3n + 2) {
  border-top-color: var(--coral);
}

.data-card:nth-child(3n + 3) {
  border-top-color: var(--gold);
}

.data-card:hover {
  transform: translateY(-4px);
  border-color: rgba(184, 241, 53, 0.4);
}

.data-card .tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(184, 241, 53, 0.14);
  color: var(--lime);
  margin-bottom: 12px;
}

.data-card .tag--coral {
  background: rgba(255, 107, 74, 0.16);
  color: var(--coral);
}

.data-card .tag--gold {
  background: rgba(245, 194, 75, 0.16);
  color: var(--gold);
}

.data-card h3 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.34;
  color: #FFFFFF;
  margin: 0 0 9px;
}

.data-card p {
  font-size: 13.5px;
  line-height: 1.74;
  color: #9FB4C6;
  margin: 0;
  max-width: none;
}

.about-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(24px, 3vw, 36px);
}

/* ---------- 收束区 ---------- */
.about-block--quiet {
  background: linear-gradient(180deg, #F4F7F5 0%, #EAF1EC 100%);
}

.about-next {
  list-style: none;
  margin: clamp(18px, 2.6vw, 30px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

@media (min-width: 760px) {
  .about-next {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }
}

.about-next__item {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 18px;
  border-radius: var(--r-m);
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(7, 26, 43, 0.08);
}

.about-next__idx {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--deep);
  background: var(--lime);
  border-radius: 8px;
  width: 28px;
  height: 28px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.about-next__item p {
  font-size: 13.5px;
  line-height: 1.76;
  color: #2A455C;
  margin: 0;
  max-width: none;
}

.about-next__item strong {
  color: var(--ink);
  font-weight: 700;
}

.about-next__outro {
  margin-top: clamp(20px, 2.6vw, 30px);
  font-size: 15px;
  line-height: 1.78;
  color: #2A455C;
}

@media (prefers-reduced-motion: reduce) {
  .about-stage,
  .team-tree__node,
  .data-card,
  .about-rail__link,
  .pen-bar {
    transition: none;
  }
}
</main>