.page-about {
  --about-hair: 1px solid rgba(143, 166, 196, 0.22);
  --about-glass: rgba(18, 41, 74, 0.66);
  --about-soft: rgba(18, 41, 74, 0.46);
  background: var(--c-night);
  color: var(--c-paper);
  font-family: var(--font-sans);
  overflow-x: clip;
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: var(--sp-4) 0 var(--sp-6);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(34, 195, 201, 0.20), transparent 62%),
    radial-gradient(90% 80% at -10% 105%, rgba(255, 90, 54, 0.16), transparent 66%),
    var(--c-night);
  border-bottom: var(--about-hair);
  overflow: hidden;
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    112deg,
    rgba(167, 243, 240, 0.07) 0,
    rgba(167, 243, 240, 0.07) 1px,
    transparent 1px,
    transparent 62px
  );
  pointer-events: none;
}

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

.page-about .breadcrumb {
  margin-bottom: var(--sp-4);
}

.page-about .about-hero__grid {
  display: grid;
  gap: var(--sp-5);
}

.page-about .about-hero__lead h1 {
  margin: 0.4rem 0 0;
  font-size: clamp(2.3rem, 8vw, 4.4rem);
  line-height: 1.04;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--c-paper);
}

.page-about .about-hero__says {
  margin: var(--sp-3) 0 0;
  max-width: 34em;
  font-size: var(--t-18);
  line-height: 1.8;
  color: #dfe7f3;
}

.page-about .about-hero__says--small {
  margin-top: var(--sp-2);
  font-size: var(--t-14);
  color: var(--c-fog);
}

.page-about .about-hero__acts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-4);
}

.page-about .about-ledger {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  padding: 1px;
  border-radius: var(--radius-lg);
  background: rgba(34, 195, 201, 0.22);
  align-self: start;
}

.page-about .about-ledger__cell {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: var(--sp-3);
  background: var(--about-soft);
  border-radius: 10px;
}

.page-about .about-ledger__num {
  font-family: var(--font-mono);
  font-size: clamp(1.9rem, 5vw, 2.6rem);
  font-weight: 700;
  line-height: 1;
  color: var(--c-rapeseed);
}

.page-about .about-ledger__label {
  font-size: var(--t-12);
  letter-spacing: 0.08em;
  color: var(--c-fog);
}

.page-about .about-ledger__foot {
  grid-column: 1 / -1;
  margin: 0;
  padding: 0.7rem var(--sp-3);
  font-size: var(--t-12);
  color: var(--c-lake-soft);
  background: rgba(11, 27, 51, 0.72);
  border-radius: 10px;
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  display: grid;
  gap: var(--sp-5);
  padding: var(--sp-5) 0 var(--sp-6);
}

.page-about .about-main > * + * {
  margin-top: var(--sp-6);
}

/* ---------- 章节头 ---------- */
.page-about .sec__head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: var(--sp-3);
  align-items: start;
  margin-bottom: var(--sp-4);
}

.page-about .sec__no {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 6vw, 3rem);
  font-weight: 700;
  line-height: 0.9;
  color: transparent;
  -webkit-text-stroke: 1.4px rgba(245, 197, 66, 0.7);
}

.page-about .sec__title {
  margin: 0;
  font-size: clamp(1.55rem, 4.4vw, 2.4rem);
  line-height: 1.18;
  letter-spacing: -0.015em;
  font-weight: 800;
  color: var(--c-paper);
}

.page-about .sec__lede {
  margin: 0.6rem 0 0;
  max-width: 40em;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--c-lake-soft);
}

.page-about .sec__body p {
  margin: 0 0 var(--sp-3);
  max-width: 40em;
  font-size: 1rem;
  line-height: 1.85;
  color: #d9e2ef;
}

/* ---------- 图片带 ---------- */
.page-about .about-band {
  position: relative;
  margin: 0 0 var(--sp-4);
  border: var(--about-hair);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--c-night-2);
}

.page-about .about-band img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 14 / 9;
  object-fit: cover;
  filter: saturate(0.82) brightness(0.72);
}

.page-about .about-band--short img {
  aspect-ratio: 16 / 9;
}

.page-about .about-band__cap {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: var(--sp-4) var(--sp-3) var(--sp-2);
  font-size: var(--t-12);
  line-height: 1.6;
  color: var(--c-lake-soft);
  background: linear-gradient(to top, rgba(11, 27, 51, 0.94), rgba(11, 27, 51, 0));
}

/* ---------- 时间线 ---------- */
.page-about .tl {
  list-style: none;
  margin: 0;
  padding: 0 0 0 1.75rem;
  position: relative;
}

.page-about .tl::before {
  content: "";
  position: absolute;
  left: 0.4rem;
  top: 0.7rem;
  bottom: 0.7rem;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(
    to bottom,
    var(--c-lake),
    rgba(245, 197, 66, 0.7) 58%,
    rgba(255, 90, 54, 0.45)
  );
}

.page-about .tl__item {
  position: relative;
  padding-bottom: var(--sp-4);
}

.page-about .tl__item:last-child {
  padding-bottom: 0;
}

.page-about .tl__item::before {
  content: "";
  position: absolute;
  left: calc(-1.75rem + 0.4rem - 4px);
  top: 0.5rem;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--c-night);
  border: 2px solid var(--c-lake);
  box-shadow: 0 0 0 3px rgba(34, 195, 201, 0.14);
}

.page-about .tl__year {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: var(--t-24);
  font-weight: 700;
  line-height: 1;
  color: var(--c-rapeseed);
  letter-spacing: 0.02em;
}

.page-about .tl__title {
  margin: 0.45rem 0 0.3rem;
  font-size: var(--t-18);
  font-weight: 700;
  color: var(--c-paper);
}

.page-about .tl__text {
  margin: 0;
  max-width: 38em;
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--c-fog);
}

/* ---------- 版本记录折叠 ---------- */
.page-about .vlog {
  margin-top: var(--sp-4);
  border: var(--about-hair);
  border-radius: var(--radius);
  background: var(--about-soft);
}

.page-about .vlog__sum {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-3);
  padding: var(--sp-3) var(--sp-4);
  font-size: var(--t-14);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--c-lake-soft);
  cursor: pointer;
  list-style: none;
}

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

.page-about .vlog__sum::after {
  content: "＋";
  flex: none;
  font-family: var(--font-mono);
  color: var(--c-rapeseed);
}

.page-about .vlog[open] .vlog__sum::after {
  content: "－";
}

.page-about .vlog__grid {
  display: grid;
  gap: var(--sp-3);
  padding: 0 var(--sp-4) var(--sp-4);
  border-top: var(--about-hair);
  padding-top: var(--sp-3);
}

.page-about .vlog__year {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: var(--t-14);
  font-weight: 700;
  color: var(--c-rapeseed);
  letter-spacing: 0.06em;
}

.page-about .vlog__text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: #cfd9e8;
}

/* ---------- 跟队节奏 ---------- */
.page-about .follow__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: var(--sp-2);
}

.page-about .follow__step {
  padding: var(--sp-3);
  border: var(--about-hair);
  border-radius: var(--radius);
  background: linear-gradient(150deg, rgba(34, 195, 201, 0.12), rgba(18, 41, 74, 0.55) 55%);
}

.page-about .follow__k {
  display: inline-block;
  margin-bottom: 0.45rem;
  padding: 0.16rem 0.6rem;
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: var(--t-12);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--c-night);
  background: var(--c-lake);
}

.page-about .follow__step p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.75;
  color: #d9e2ef;
}

/* ---------- 三审步骤 ---------- */
.page-about .steps {
  list-style: none;
  margin: var(--sp-4) 0 0;
  padding: 0;
  display: grid;
  gap: var(--sp-2);
}

.page-about .steps__item {
  padding: var(--sp-3);
  border-radius: var(--radius);
  border: var(--about-hair);
  background: var(--about-glass);
}

.page-about .steps__no {
  font-family: var(--font-mono);
  font-size: var(--t-24);
  font-weight: 700;
  color: var(--c-flare);
}

.page-about .steps__label {
  margin: 0.3rem 0 0.35rem;
  font-size: var(--t-18);
  font-weight: 700;
  color: var(--c-paper);
}

.page-about .steps__item p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--c-fog);
}

.page-about .team__note {
  margin: var(--sp-4) 0 0;
  max-width: 40em;
  padding-left: var(--sp-3);
  border-left: 3px solid var(--c-rapeseed);
  font-size: 0.95rem;
  line-height: 1.8;
  color: #d9e2ef;
}

.page-about .team__note a {
  color: var(--c-lake);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-about .team__note a:hover,
.page-about .team__note a:focus-visible {
  color: var(--c-rapeseed);
}

/* ---------- 档案字段 ---------- */
.page-about .fieldgrid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1px;
  margin: 0;
  padding: 1px;
  border-radius: var(--radius);
  background: rgba(143, 166, 196, 0.2);
}

.page-about .field {
  padding: var(--sp-3);
  background: var(--c-night-2);
}

.page-about .field__name {
  font-size: var(--t-14);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--c-lake);
}

.page-about .field__note {
  margin: 0.35rem 0 0;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--c-fog);
}

.page-about .zone__caption {
  margin: var(--sp-4) 0 var(--sp-2);
  font-size: var(--t-12);
  letter-spacing: 0.16em;
  color: var(--c-fog);
}

.page-about .zonegrid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(92px, 1fr));
  gap: var(--sp-1);
}

.page-about .zone {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 0.4rem;
  padding: 0.6rem 0.7rem;
  border-radius: 9px;
  border: var(--about-hair);
  background: rgba(11, 27, 51, 0.6);
}

.page-about .zone__no {
  font-family: var(--font-mono);
  font-size: var(--t-14);
  font-weight: 700;
  color: var(--c-rapeseed);
}

.page-about .zone__num {
  font-size: var(--t-12);
  color: var(--c-fog);
}

.page-about .zone__more {
  margin: var(--sp-4) 0 0;
}

/* ---------- 区域实践 ---------- */
.page-about .pracgrid {
  display: grid;
  gap: var(--sp-2);
}

.page-about .prac {
  padding: var(--sp-4) var(--sp-3);
  border-radius: var(--radius);
  border: var(--about-hair);
  background: linear-gradient(160deg, rgba(255, 90, 54, 0.1), rgba(18, 41, 74, 0.55) 60%);
}

.page-about .prac__title {
  margin: 0 0 0.5rem;
  font-size: var(--t-18);
  font-weight: 700;
  color: var(--c-rapeseed);
}

.page-about .prac__text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: #d9e2ef;
}

.page-about .statrow {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 1px;
  margin-top: var(--sp-4);
  padding: 1px;
  border-radius: var(--radius);
  background: rgba(34, 195, 201, 0.24);
}

.page-about .statrow__cell {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: var(--sp-3);
  background: var(--c-night-2);
}

.page-about .statrow__n {
  font-family: var(--font-mono);
  font-size: var(--t-24);
  font-weight: 700;
  line-height: 1;
  color: var(--c-lake);
}

.page-about .statrow__l {
  font-size: var(--t-12);
  letter-spacing: 0.06em;
  color: var(--c-fog);
}

/* ---------- 侧栏 ---------- */
.page-about .about-aside {
  display: grid;
  gap: var(--sp-3);
  align-content: start;
}

.page-about .about-index {
  padding: var(--sp-3);
  border-radius: var(--radius);
  border: var(--about-hair);
  background: var(--about-glass);
  backdrop-filter: blur(6px);
}

.page-about .about-index__title {
  margin: 0 0 var(--sp-2);
  font-size: var(--t-12);
  letter-spacing: 0.2em;
  color: var(--c-lake);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
}

.page-about .about-index__link {
  display: flex;
  align-items: baseline;
  gap: 0.6rem;
  padding: 0.6rem 0.4rem;
  border-radius: 8px;
  font-size: var(--t-14);
  color: #dbe4f1;
  text-decoration: none;
  border-bottom: var(--about-hair);
  transition: background-color 0.2s ease, color 0.2s ease;
}

.page-about .about-index__list li:last-child .about-index__link {
  border-bottom: 0;
}

.page-about .about-index__no {
  font-family: var(--font-mono);
  font-size: var(--t-12);
  font-weight: 700;
  color: var(--c-rapeseed);
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  background: rgba(34, 195, 201, 0.14);
  color: var(--c-paper);
}

.page-about .about-hint {
  padding: var(--sp-3);
  border-radius: var(--radius);
  border: var(--about-hair);
  background: rgba(11, 27, 51, 0.72);
}

.page-about .about-hint__text {
  margin: 0 0 var(--sp-2);
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--c-fog);
}

/* ---------- 继续了解 ---------- */
.page-about .about-next {
  padding: var(--sp-6) 0 var(--sp-6);
  background:
    radial-gradient(100% 80% at 10% 0%, rgba(34, 195, 201, 0.14), transparent 60%),
    var(--c-night-2);
  border-top: var(--about-hair);
}

.page-about .nextgrid {
  display: grid;
  gap: var(--sp-2);
}

.page-about .nextcard {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  padding: var(--sp-4) var(--sp-3);
  border-radius: var(--radius);
  border: var(--about-hair);
  background: var(--c-night);
  text-decoration: none;
  color: var(--c-paper);
  transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-about .nextcard__title {
  margin: 0;
  font-size: var(--t-18);
  font-weight: 700;
  color: var(--c-paper);
}

.page-about .nextcard__text {
  margin: 0;
  flex: 1;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--c-fog);
}

.page-about .nextcard__go {
  font-family: var(--font-mono);
  font-size: var(--t-12);
  letter-spacing: 0.08em;
  color: var(--c-flare);
}

.page-about .nextcard:hover,
.page-about .nextcard:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(34, 195, 201, 0.5);
  box-shadow: 0 0 0 1px rgba(34, 195, 201, 0.35), 0 12px 26px rgba(0, 0, 0, 0.32);
}

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

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

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

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

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

@media (min-width: 900px) {
  .page-about .about-hero {
    padding: var(--sp-5) 0 var(--sp-7);
  }

  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.72fr);
    gap: var(--sp-5);
    align-items: start;
  }

  .page-about .about-ledger {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 2.6rem;
  }

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

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

  .page-about .about-band img {
    aspect-ratio: 21 / 9;
  }

  .page-about .about-band--short img {
    aspect-ratio: 2 / 1;
  }
}

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: minmax(0, 1fr) 286px;
    gap: var(--sp-6);
    padding-top: var(--sp-6);
  }

  .page-about .about-aside {
    position: sticky;
    top: 96px;
    align-self: start;
  }

  .page-about .tl {
    padding-left: 2rem;
  }

  .page-about .tl__item::before {
    left: calc(-2rem + 0.4rem - 4px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .nextcard {
    transition: none;
  }

  .page-about .nextcard:hover,
  .page-about .nextcard:focus-visible {
    transform: none;
  }
}
<<<END>>>