.page-about {
  --about-index-w: 220px;
  --about-rule: rgba(242, 244, 255, .14);
}

.page-about [data-face="magenta"] { --face: var(--magenta); }
.page-about [data-face="cobalt"]  { --face: var(--cobalt); }
.page-about [data-face="lime"]    { --face: var(--lime); }
.page-about [data-face="amber"]   { --face: var(--amber); }
.page-about [data-face="cyan"]    { --face: var(--cyan); }
.page-about [data-face="wine"]    { --face: var(--wine); }

.page-about .breadcrumb {
  margin-top: 1.5rem;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  border-bottom: 2px solid var(--edge);
  padding: clamp(2rem, 5vw, 4rem) 0 clamp(2.5rem, 6vw, 4.5rem);
  background:
    radial-gradient(120% 100% at 100% 0%, rgba(255, 176, 32, .14), transparent 62%),
    linear-gradient(180deg, rgba(20, 22, 31, .88), rgba(11, 16, 48, 0));
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  right: -14%;
  bottom: -38%;
  width: min(62vw, 560px);
  aspect-ratio: 1 / 1;
  background: conic-gradient(from 40deg, var(--amber), var(--magenta), var(--cobalt), var(--amber));
  clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
  opacity: .16;
  transform: rotate(-10deg);
  pointer-events: none;
}

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

.page-about .about-hero .display-title {
  max-width: 20ch;
  margin: 0 0 1.25rem;
}

.page-about .about-hero__lead {
  max-width: 46ch;
  margin: 0;
  font-size: 1.0625rem;
  line-height: 1.85;
  color: rgba(242, 244, 255, .88);
}

.page-about .about-stats {
  list-style: none;
  margin: 2.25rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--edge);
  border: 2px solid var(--edge-strong);
  box-shadow: var(--shadow-hard-sm);
  max-width: 760px;
}

.page-about .about-stats li {
  background: var(--panel);
  padding: .9rem 1rem 1rem;
  display: grid;
  gap: .2rem;
}

.page-about .about-stats__num {
  font-size: clamp(1.4rem, 4.2vw, 1.9rem);
  font-weight: 700;
  line-height: 1.1;
  color: var(--amber);
}

.page-about .about-stats__label {
  font-size: .8125rem;
  color: var(--graphite);
}

/* ---------- 主体骨架 ---------- */

.page-about .about-body {
  margin-top: clamp(2rem, 5vw, 3.5rem);
  margin-bottom: clamp(3rem, 8vw, 6rem);
}

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

.page-about .about-block {
  scroll-margin-top: 6rem;
}

.page-about .about-block + .about-block {
  margin-top: clamp(2.75rem, 6vw, 4.5rem);
}

/* ---------- 左侧索引 ---------- */

.page-about .about-index {
  border: 2px solid var(--edge-strong);
  border-left: 6px solid var(--amber);
  background: var(--panel-2);
  box-shadow: var(--shadow-hard-sm);
  padding: 1rem 1.1rem 1.1rem;
  margin-bottom: 2.5rem;
}

.page-about .about-index__title {
  margin: 0 0 .85rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .18em;
  color: var(--graphite);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: .5rem;
  overflow-x: auto;
  scrollbar-width: none;
  -webkit-overflow-scrolling: touch;
}

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

.page-about .about-index__list a {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  white-space: nowrap;
  padding: .45rem .7rem;
  border: 1px solid var(--edge);
  color: var(--fog);
  text-decoration: none;
  font-size: .875rem;
  transition: border-color .2s var(--ease), color .2s var(--ease), background-color .2s var(--ease);
}

.page-about .about-index__list .mono {
  font-size: .75rem;
  color: var(--graphite);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  border-color: var(--amber);
  color: var(--amber);
  background: rgba(255, 176, 32, .08);
}

/* ---------- 章节标题 ---------- */

.page-about .about-head {
  display: flex;
  align-items: flex-start;
  gap: .9rem;
  margin-bottom: 1.5rem;
}

.page-about .about-head__note {
  flex: none;
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .12em;
  line-height: 1;
  color: var(--graphite);
  border-left: 3px solid var(--face);
  padding-left: .35rem;
}

.page-about .about-head__kicker {
  margin: 0 0 .4rem;
  font-size: .75rem;
  letter-spacing: .16em;
  color: var(--face);
}

.page-about .about-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.4vw, 2.3rem);
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--fog);
}

.page-about .about-lead {
  max-width: 54ch;
  margin: 0 0 1.75rem;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(242, 244, 255, .86);
}

/* ---------- 四件事卡片 ---------- */

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

.page-about .about-card {
  border: 2px solid var(--edge-strong);
  border-top: 6px solid var(--face);
  background: var(--panel);
  box-shadow: var(--shadow-hard-sm);
  padding: 1.1rem 1.15rem 1.25rem;
}

.page-about .about-card h3 {
  margin: 0 0 .55rem;
  font-size: 1.0625rem;
  line-height: 1.45;
  color: var(--fog);
}

.page-about .about-card p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.78;
  color: var(--graphite);
}

/* ---------- 六面 ---------- */

.page-about .about-faces-layout {
  display: grid;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.page-about .about-faces-copy p {
  max-width: 46ch;
  margin: 0 0 .9rem;
  font-size: 1rem;
  line-height: 1.85;
  color: rgba(242, 244, 255, .86);
}

.page-about .about-faces-copy p:last-child {
  margin-bottom: 0;
}

.page-about .media-frame {
  margin: 0;
}

.page-about .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border: 2px solid var(--edge-strong);
  box-shadow: var(--shadow-hard-sm);
}

.page-about .media-frame__caption {
  display: block;
  margin-top: .6rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--graphite);
}

.page-about .about-faces {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: .85rem;
}

.page-about .about-face {
  border: 2px solid var(--edge-strong);
  border-left: 6px solid var(--face);
  background: linear-gradient(160deg, rgba(20, 22, 31, 1), rgba(10, 13, 32, 1));
  box-shadow: var(--shadow-hard-sm);
  padding: .95rem 1rem 1.05rem;
}

.page-about .about-face h3 {
  margin: 0 0 .4rem;
  font-size: 1rem;
  color: var(--fog);
}

.page-about .about-face h3::before {
  content: "";
  display: inline-block;
  width: .55em;
  height: .55em;
  margin-right: .5em;
  background: var(--face);
  transform: translateY(-.08em);
}

.page-about .about-face p {
  margin: 0;
  font-size: .875rem;
  line-height: 1.72;
  color: rgba(242, 244, 255, .78);
}

/* ---------- 团队 ---------- */

.page-about .about-team-figure {
  margin-bottom: 1.75rem;
}

.page-about .about-team {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about .about-team-card {
  border: 2px solid var(--edge-strong);
  border-bottom: 6px solid var(--face);
  background: var(--panel);
  box-shadow: var(--shadow-hard-sm);
}

.page-about .about-team-card > summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: .55rem;
  padding: .9rem 1rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 1rem;
  color: var(--fog);
}

.page-about .about-team-card > summary::-webkit-details-marker {
  display: none;
}

.page-about .about-team-card > summary::marker {
  content: "";
}

.page-about .about-team-card > summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  font-weight: 400;
  color: var(--face);
}

.page-about .about-team-card[open] > summary::after {
  content: "－";
}

.page-about .about-team-card[open] > summary {
  border-bottom: 1px solid var(--edge-soft);
}

.page-about .about-team-card > p {
  margin: .9rem 1rem .55rem;
  font-size: .9375rem;
  line-height: 1.78;
  color: rgba(242, 244, 255, .84);
}

.page-about .about-team-card ul {
  margin: 0 0 1.05rem;
  padding: 0 1rem 0 2rem;
  font-size: .875rem;
  line-height: 1.78;
  color: var(--graphite);
}

.page-about .about-team-card li + li {
  margin-top: .25rem;
}

/* ---------- 迭代节奏 ---------- */

.page-about .about-rhythm-figure {
  margin-bottom: 1.75rem;
}

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

.page-about .about-rhythm > li {
  position: relative;
  border: 2px solid var(--edge-strong);
  background: var(--panel-2);
  box-shadow: var(--shadow-hard-sm);
  padding: 1.5rem 1.1rem 1.2rem;
}

.page-about .about-rhythm > li::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  right: -2px;
  height: 5px;
  background: var(--face);
}

.page-about .about-rhythm__idx {
  display: block;
  margin-bottom: .5rem;
  font-size: .75rem;
  letter-spacing: .18em;
  color: var(--face);
}

.page-about .about-rhythm h3 {
  margin: 0 0 .5rem;
  font-size: 1.0625rem;
  color: var(--fog);
}

.page-about .about-rhythm p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.78;
  color: rgba(242, 244, 255, .8);
}

.page-about .about-rhythm__foot {
  margin: 1.5rem 0 0;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--graphite);
}

.page-about .about-rhythm__foot .mono {
  color: var(--amber);
}

/* ---------- 反馈路径 ---------- */

.page-about .about-path {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-path > li {
  position: relative;
  margin-left: 8px;
  padding: 0 0 1.6rem 2.25rem;
  border-left: 2px solid var(--edge);
}

.page-about .about-path > li:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.page-about .about-path > li::before {
  content: "";
  position: absolute;
  left: -9px;
  top: .3rem;
  width: 16px;
  height: 16px;
  background: var(--face);
  border: 2px solid var(--ink);
  transform: rotate(45deg);
}

.page-about .about-path h3 {
  margin: 0 0 .45rem;
  font-size: 1rem;
  color: var(--fog);
}

.page-about .about-path p {
  margin: 0;
  max-width: 52ch;
  font-size: .9375rem;
  line-height: 1.78;
  color: rgba(242, 244, 255, .8);
}

/* ---------- 我们在意什么 ---------- */

.page-about .about-values {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-about .about-value {
  border: 2px solid var(--edge-strong);
  background: linear-gradient(170deg, rgba(122, 31, 75, .42), rgba(20, 22, 31, 1) 62%);
  box-shadow: var(--shadow-hard-sm);
  padding: 1.25rem 1.1rem 1.3rem;
}

.page-about .about-value h3 {
  margin: 0 0 .55rem;
  font-size: 1.0625rem;
  color: var(--fog);
}

.page-about .about-value p {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.78;
  color: rgba(242, 244, 255, .84);
}

.page-about .about-value .mono {
  color: var(--amber);
  font-weight: 700;
}

/* ---------- 出口链接 ---------- */

.page-about .about-exits {
  margin-top: clamp(2.75rem, 6vw, 4.5rem);
  border: 2px solid var(--edge-strong);
  border-top: 6px solid var(--amber);
  background: var(--panel-2);
  box-shadow: var(--shadow-hard-sm);
  padding: 1.5rem 1.25rem 1.6rem;
}

.page-about .about-exits h2 {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.15rem, 3.2vw, 1.5rem);
  line-height: 1.3;
  color: var(--fog);
}

.page-about .about-exits ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: .6rem;
}

.page-about .about-exits a {
  display: flex;
  align-items: center;
  gap: .6rem;
  padding: .75rem .9rem;
  border: 1px solid var(--edge);
  color: var(--fog);
  text-decoration: none;
  font-size: .9375rem;
  transition: border-color .2s var(--ease), background-color .2s var(--ease), transform .2s var(--ease);
}

.page-about .about-exits a::before {
  content: "▸";
  font-size: .8em;
  color: var(--amber);
}

.page-about .about-exits a:hover,
.page-about .about-exits a:focus-visible {
  border-color: var(--amber);
  background: rgba(255, 176, 32, .08);
  transform: translateX(3px);
}

/* ---------- 中等屏幕 ---------- */

@media (min-width: 640px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

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

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

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

/* ---------- 桌面 ---------- */

@media (min-width: 900px) {
  .page-about .about-faces-layout {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, .85fr);
    align-items: center;
    gap: 2.5rem;
  }

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

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

@media (min-width: 1024px) {
  .page-about .about-body {
    display: grid;
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    gap: clamp(2rem, 4vw, 3.75rem);
    align-items: start;
  }

  .page-about .about-index {
    position: sticky;
    top: 6rem;
    margin-bottom: 0;
    padding: 1.1rem 1.15rem 1.2rem;
  }

  .page-about .about-index__list {
    flex-direction: column;
    gap: 0;
    overflow: visible;
  }

  .page-about .about-index__list a {
    width: 100%;
    white-space: normal;
    border: 0;
    border-left: 2px solid transparent;
    padding: .45rem .3rem .45rem .6rem;
  }

  .page-about .about-index__list a:hover,
  .page-about .about-index__list a:focus-visible {
    border-left-color: var(--amber);
    background: rgba(255, 176, 32, .08);
  }

  .page-about .about-card:nth-child(2),
  .page-about .about-card:nth-child(4) {
    transform: translateY(10px);
  }

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