.page-about {
  --about-gap: clamp(20px, 4vw, 56px);
  --about-pad: clamp(52px, 8vw, 100px);
  --about-slash: clamp(14px, 3vw, 40px);
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-about .about-wrap {
  width: 100%;
  max-width: 1280px;
  margin-inline: auto;
  padding-inline: var(--about-gap);
}

/* ---------- 面包屑 ---------- */
.page-about .about-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  max-width: 1280px;
  margin-inline: auto;
  padding: 18px var(--about-gap) 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-about .about-crumb a {
  color: var(--glow);
  text-decoration: none;
}

.page-about .about-crumb a:hover,
.page-about .about-crumb a:focus-visible {
  color: var(--glow-2);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-crumb [aria-current="page"] {
  color: var(--text);
}

/* ---------- 抬头带 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  margin-top: 18px;
  padding-block: clamp(34px, 5vw, 62px) clamp(42px, 6vw, 78px);
  background: var(--wine);
  border-block: 1px solid var(--line);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(90deg, rgba(232, 241, 237, .045) 0 1px, transparent 1px 72px);
  pointer-events: none;
}

.page-about .about-hero__in {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: center;
}

.page-about .about-hero .sp-h1 {
  margin-top: 14px;
}

.page-about .about-hero .sp-lead {
  margin-top: 16px;
  max-width: 34em;
}

.page-about .about-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-chips li {
  padding: 6px 10px;
  border: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
}

.page-about .about-chips li.is-kick {
  border-color: var(--amber);
  color: var(--amber);
}

.page-about .about-hero__fig {
  margin: 0;
  overflow: hidden;
  background: var(--char);
  clip-path: polygon(0 0, 100% 0, 100% 84%, 88% 100%, 0 100%);
}

/* ---------- 通用框线 ---------- */
.page-about .about-frame {
  border: 1px solid var(--line);
  transition: border-color .18s var(--ease);
}

.page-about .about-frame:hover {
  border-color: var(--glow);
}

.page-about .about-hero__fig img,
.page-about .about-fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  opacity: .92;
}

/* ---------- 分区壳体 ---------- */
.page-about .about-sec {
  position: relative;
  padding-block: var(--about-pad);
}

.page-about .about-sec--wine { background: var(--wine); }
.page-about .about-sec--jade { background: var(--jade); }
.page-about .about-sec--char { background: var(--char); }
.page-about .about-sec--indigo { background: var(--indigo); }

.page-about .about-slash {
  clip-path: polygon(0 var(--about-slash), 100% 0, 100% 100%, 0 100%);
  padding-top: calc(var(--about-pad) + var(--about-slash));
}

.page-about .about-sec__in {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

/* ---------- 左侧刻度索引 ---------- */
.page-about .about-gauge {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-about .about-gauge__n {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--amber);
}

.page-about .about-gauge__bar {
  flex: 1 1 auto;
  height: 1px;
  background: linear-gradient(90deg, var(--amber), rgba(255, 138, 61, 0));
}

/* ---------- 内容体 ---------- */
.page-about .about-sec__body > .sp-h2 {
  margin-bottom: 18px;
}

.page-about .about-txt {
  max-width: 34em;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text);
}

.page-about .about-txt p + p {
  margin-top: 14px;
}

.page-about .about-sec__body > .about-txt + .about-txt,
.page-about .about-sec__body > .about-steps + .about-cols,
.page-about .about-sec__body > .about-roles + .about-txt,
.page-about .about-sec__body > .about-lines + .about-actions,
.page-about .about-sec__body > .about-actions + .about-txt {
  margin-top: 26px;
}

.page-about .about-txt a,
.page-about .about-note a {
  color: var(--glow);
  text-decoration: none;
  border-bottom: 1px solid rgba(79, 227, 176, .45);
  transition: color .16s var(--ease), border-color .16s var(--ease);
}

.page-about .about-txt a:hover,
.page-about .about-txt a:focus-visible,
.page-about .about-note a:hover,
.page-about .about-note a:focus-visible {
  color: var(--glow-2);
  border-bottom-color: var(--glow-2);
}

.page-about .about-sec__body > .about-txt:first-of-type {
  margin-bottom: 26px;
}

/* ---------- 校对刻度 svg ---------- */
.page-about .about-ruler {
  display: block;
  width: 100%;
  height: auto;
  margin: 0 0 24px;
}

.page-about .about-ruler line {
  stroke: var(--line);
  stroke-width: 1.5;
}

.page-about .about-ruler circle {
  fill: var(--amber);
}

/* ---------- 四步节奏 ---------- */
.page-about .about-steps {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin: 0 0 34px;
  padding: 0;
  list-style: none;
}

.page-about .about-steps__i {
  border-left: 2px solid var(--line);
  padding: 2px 0 2px 16px;
  transition: border-color .18s var(--ease);
}

.page-about .about-steps__i:hover {
  border-left-color: var(--glow);
}

.page-about .about-steps__t {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--amber);
}

.page-about .about-steps__i p {
  font-size: .95rem;
  line-height: 1.7;
  color: var(--text);
}

/* ---------- 图文两栏 ---------- */
.page-about .about-cols {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(22px, 3vw, 40px);
  align-items: start;
}

.page-about .about-fig {
  margin: 0;
  padding: 0;
  overflow: hidden;
  background: var(--char);
}

.page-about .about-fig .sp-media__cap {
  display: block;
  padding: 12px 14px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 角色 ---------- */
.page-about .about-roles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .about-role {
  padding: 20px 18px 22px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--glow);
  background: rgba(7, 17, 14, .38);
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-about .about-role:hover {
  border-color: var(--glow);
  background: rgba(14, 42, 42, .55);
}

.page-about .about-role .sp-h3 {
  margin-bottom: 10px;
  font-family: var(--font-mono);
  letter-spacing: .06em;
  color: var(--text);
}

.page-about .about-role p {
  font-size: .95rem;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 版本节点带 ---------- */
.page-about .about-vers {
  display: flex;
  gap: 16px;
  margin: 26px 0 0;
  padding: 22px 0 14px;
  list-style: none;
  overflow-x: auto;
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  outline-offset: 4px;
}

.page-about .about-vers__i {
  position: relative;
  flex: 0 0 78%;
  min-width: 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  scroll-snap-align: start;
  transition: border-color .18s var(--ease);
}

.page-about .about-vers__i::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--amber);
  transition: background-color .18s var(--ease), box-shadow .18s var(--ease);
}

.page-about .about-vers__i:hover,
.page-about .about-vers__i:focus-within {
  border-top-color: var(--glow);
}

.page-about .about-vers__i:hover::before,
.page-about .about-vers__i:focus-within::before {
  background: var(--glow);
  box-shadow: 0 0 0 4px rgba(79, 227, 176, .18);
}

.page-about .about-vers__v {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .06em;
  color: var(--amber);
}

.page-about .about-vers__k {
  font-size: .92rem;
  line-height: 1.7;
  color: var(--muted);
}

.page-about .about-sec__body > .about-vers + .about-txt {
  margin-top: 24px;
}

/* ---------- 联系信息 ---------- */
.page-about .about-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 30px 0 0;
  border-top: 1px solid var(--line);
}

.page-about .about-contact__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-about .about-contact dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--muted);
}

.page-about .about-contact dd {
  margin: 0;
  font-size: .98rem;
  line-height: 1.6;
  color: var(--text);
  word-break: break-word;
}

.page-about .about-contact dd a {
  color: var(--glow);
  text-decoration: none;
}

.page-about .about-contact dd a:hover,
.page-about .about-contact dd a:focus-visible {
  color: var(--glow-2);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .about-note {
  margin-top: 20px;
  font-size: .88rem;
  color: var(--muted);
}

/* ---------- 说明清单 ---------- */
.page-about .about-lines {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: aboutline;
}

.page-about .about-lines li {
  position: relative;
  padding: 16px 0 16px 34px;
  border-bottom: 1px solid var(--line);
  font-size: .98rem;
  line-height: 1.7;
  color: var(--text);
}

.page-about .about-lines li::before {
  counter-increment: aboutline;
  content: counter(aboutline, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--muted);
}

.page-about .about-lines li::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: 0;
  height: 1px;
  background: var(--glow);
  transition: width .24s var(--ease);
}

.page-about .about-lines li:hover::after {
  width: 42%;
}

.page-about .about-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 30px 0 0;
}

.page-about .about-actions .sp-btn {
  flex: 0 1 auto;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 700px) {
  .page-about .about-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 24px;
  }

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

  .page-about .about-contact__row {
    grid-template-columns: 140px minmax(0, 1fr);
    align-items: baseline;
    gap: 16px;
  }

  .page-about .about-vers__i {
    flex: 0 0 44%;
  }
}

@media (min-width: 900px) {
  .page-about .about-hero__in {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  }

  .page-about .about-cols--media {
    grid-template-columns: minmax(0, 1fr) minmax(0, .82fr);
  }
}

@media (min-width: 1024px) {
  .page-about .about-sec__in {
    grid-template-columns: 108px minmax(0, 1fr);
    gap: clamp(28px, 3vw, 52px);
  }

  .page-about .about-gauge {
    flex-direction: column;
    align-items: flex-start;
    gap: 16px;
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .about-gauge__bar {
    flex: 0 0 auto;
    width: 1px;
    height: 84px;
    background: linear-gradient(180deg, var(--amber), rgba(255, 138, 61, 0));
  }

  .page-about .about-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-vers__i {
    flex: 0 0 21%;
  }

  .page-about .about-contact {
    grid-template-columns: minmax(0, 1fr);
    max-width: 34em;
  }
}
<<<END>>>