.page-about {
  --about-line: rgba(167, 184, 201, .26);
  --about-line-soft: rgba(167, 184, 201, .14);
  --about-ink: #071A2B;
  background: var(--ink-900);
  color: var(--white);
  overflow-x: hidden;
}

.page-about .about-crumb {
  padding-top: clamp(14px, 2.4vw, 24px);
}

.page-about .about-crumb .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-about .about-crumb .breadcrumbs li + li::before {
  content: "/";
  margin-right: 6px;
  color: var(--ice);
}

.page-about .about-crumb .breadcrumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .16s ease, border-color .16s ease;
}

.page-about .about-crumb .breadcrumbs a:hover,
.page-about .about-crumb .breadcrumbs a:focus-visible {
  color: var(--ice);
  border-bottom-color: var(--ice);
}

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

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  padding: clamp(26px, 4vw, 48px) 0 clamp(40px, 6vw, 76px);
  background:
    radial-gradient(circle at 84% 8%, rgba(127, 219, 232, .18), transparent 58%),
    linear-gradient(180deg, var(--ink-800) 0%, var(--ink-900) 82%);
  border-bottom: 2px solid var(--black);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(127, 219, 232, .09) 1px, transparent 1px),
    linear-gradient(90deg, rgba(127, 219, 232, .09) 1px, transparent 1px);
  background-size: 58px 58px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 88%);
  pointer-events: none;
}

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

.page-about .about-hero__grid {
  row-gap: clamp(24px, 4vw, 36px);
}

.page-about .about-index {
  border-left: 3px solid var(--orange);
  padding-left: 16px;
}

.page-about .about-index__label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ice);
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px 14px;
}

.page-about .about-index__list a {
  display: flex;
  gap: 8px;
  align-items: baseline;
  padding: 6px 0;
  font-size: 14px;
  line-height: 1.45;
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid var(--about-line-soft);
  transition: color .16s ease, border-color .16s ease, padding-left .16s ease;
}

.page-about .about-index__list a .mono {
  font-size: 11px;
  color: var(--orange);
}

.page-about .about-index__list a:hover,
.page-about .about-index__list a:focus-visible {
  color: var(--white);
  border-bottom-color: var(--orange);
  padding-left: 4px;
}

.page-about .about-index__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 18px;
}

.page-about .about-hero__title {
  margin: 10px 0 0;
  letter-spacing: -.02em;
  line-height: 1.08;
  text-wrap: balance;
}

.page-about .about-hero__lede {
  margin-top: clamp(14px, 2vw, 20px);
  max-width: 62ch;
  color: #D8E4EE;
}

.page-about .hero-figures {
  list-style: none;
  margin: clamp(22px, 3.4vw, 36px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px;
  background: var(--about-line);
  border: 2px solid var(--black);
  box-shadow: var(--shadow-hard);
}

.page-about .hero-figures li {
  background: var(--ink-800);
  padding: 14px 16px 16px;
  border-top: 4px solid var(--ice);
}

.page-about .hero-figures li:nth-child(2) {
  border-top-color: var(--orange);
}

.page-about .hero-figures li:nth-child(3) {
  border-top-color: var(--lmie, var(--coral));
  border-top-color: var(--coral);
}

.page-about .hero-figures li:nth-child(4) {
  border-top-color: var(--lime);
}

.page-about .hero-figures__num {
  display: block;
  font-size: clamp(30px, 4.4vw, 46px);
  line-height: 1;
  color: var(--white);
  font-variant-numeric: tabular-nums;
}

.page-about .hero-figures__label {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--mist);
}

/* ---------- 通用说明段 ---------- */

.page-about .about-intro {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-figure {
  margin: clamp(20px, 3vw, 32px) 0;
  border: 3px solid var(--black);
  box-shadow: var(--shadow-hard);
  background: var(--ink-800);
}

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

.page-about .about-figure figcaption {
  padding: 10px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
  border-top: 2px solid var(--black);
  background: rgba(7, 26, 43, .92);
}

/* ---------- 时间轴 ---------- */

.page-about .season-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
  position: relative;
}

.page-about .season-track::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 2px;
  background: repeating-linear-gradient(180deg, var(--ice) 0 8px, transparent 8px 16px);
  opacity: .5;
}

.page-about .season-row {
  display: grid;
  gap: 6px 20px;
  margin-left: 16px;
  padding: 16px 18px;
  background: var(--ink-800);
  border: 2px solid var(--black);
  border-left: 6px solid var(--ice);
  box-shadow: 6px 6px 0 rgba(2, 9, 15, .5);
  transition: border-color .18s ease, transform .18s ease, box-shadow .18s ease;
}

.page-about .season-row:hover {
  border-left-color: var(--orange);
  transform: translate(-2px, -2px);
  box-shadow: 9px 9px 0 rgba(2, 9, 15, .58);
}

.page-about .season-row__phase {
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--coral);
  text-transform: uppercase;
}

.page-about .season-row__title {
  margin: 0 0 6px;
  font-size: 1.06rem;
  line-height: 1.4;
  color: var(--white);
  letter-spacing: -.01em;
}

.page-about .season-row__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: #C6D5E2;
}

/* ---------- 核对流程 ---------- */

.page-about .about-review {
  position: relative;
  padding-top: clamp(52px, 8vw, 92px);
  padding-bottom: clamp(56px, 8vw, 96px);
}

.page-about .about-review__bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(11, 39, 64, .96) 0%, rgba(7, 26, 43, .98) 100%),
    repeating-linear-gradient(90deg, rgba(127, 219, 232, .16) 0 1px, transparent 1px 64px);
  clip-path: polygon(0 0, 100% 2.2%, 100% 100%, 0 97.6%);
  border-top: 2px solid black;
  border-bottom: 2px solid black;
  pointer-events: none;
}

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

.page-about .review-steps {
  list-style: none;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .review-steps > li {
  position: relative;
  padding: 18px 18px 18px 68px;
  background: var(--paper);
  color: var(--about-ink);
  border: 2px solid var(--black);
  box-shadow: 6px 6px 0 rgba(2, 9, 15, .58);
  transition: transform .18s ease, box-shadow .18s ease;
}

.page-about .review-steps > li:hover {
  transform: translate(-2px, -2px);
  box-shadow: 9px 9px 0 rgba(2, 9, 15, .62);
}

.page-about .review-steps .step-no {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--orange);
  color: var(--black);
  font-size: 18px;
  border-right: 2px solid var(--black);
  font-variant-numeric: tabular-nums;
}

.page-about .review-steps h3 {
  margin: 0 0 6px;
  font-size: 1rem;
  letter-spacing: .01em;
  color: #02090F;
}

.page-about .review-steps p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: #1B3247;
}

.page-about .about-review .about-figure {
  margin-bottom: 0;
}

/* ---------- 团队 ---------- */

.page-about .about-team__grid {
  row-gap: clamp(24px, 4vw, 40px);
}

.page-about .about-team__lead {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .about-team__duty {
  margin-top: clamp(20px, 3vw, 28px);
  padding: 18px;
  background: var(--ink-800);
  border: 2px solid var(--black);
  border-top: 4px solid var(--lime);
}

.page-about .about-team__duty-label {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--lime);
  text-transform: uppercase;
}

.page-about .about-team__duty ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-about .about-team__duty li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.65;
  color: #C6D5E2;
}

.page-about .about-team__duty li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 7px;
  height: 7px;
  background: var(--ice);
}

.page-about .team-list {
  display: grid;
  gap: 12px;
}

.page-about .team-row {
  padding: 16px 18px;
  background: rgba(11, 39, 64, .74);
  border: 2px solid var(--about-line);
  border-left: 4px solid var(--coral);
  transition: border-color .18s ease, background .18s ease, transform .18s ease;
}

.page-about .team-row:hover,
.page-about .team-row:focus-within {
  border-color: var(--ice);
  background: var(--ink-800);
  transform: translateX(3px);
}

.page-about .team-row__head {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 8px;
  flex-wrap: wrap;
}

.page-about .team-row__num {
  font-size: 30px;
  line-height: 1;
  color: var(--ice);
  font-variant-numeric: tabular-nums;
}

.page-about .team-row__role {
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: -.01em;
}

.page-about .team-row__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: #C6D5E2;
}

/* ---------- 版本 ---------- */

.page-about .release-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .release {
  background: var(--ink-800);
  border: 2px solid var(--black);
  box-shadow: var(--shadow-hard);
  transition: border-color .18s ease;
}

.page-about .release[open] {
  border-color: var(--orange);
}

.page-about .release summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 12px;
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  border-bottom: 2px solid transparent;
  transition: background .16s ease, border-color .16s ease;
}

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

.page-about .release summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--ice);
}

.page-about .release[open] summary::after {
  content: "−";
  color: var(--orange);
}

.page-about .release summary:hover,
.page-about .release summary:focus-visible {
  background: rgba(127, 219, 232, .08);
}

.page-about .release[open] summary {
  border-bottom-color: var(--black);
  background: rgba(255, 107, 44, .1);
}

.page-about .release__ver {
  font-size: 24px;
  line-height: 1;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-about .release__name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
}

.page-about .release__hint {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-about .release__body {
  padding: 14px 16px 18px;
}

.page-about .release__body p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: #C6D5E2;
}

/* ---------- 合作 ---------- */

.page-about .partner-grid {
  display: grid;
  gap: 14px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .partner-card {
  padding: 18px;
  background: var(--ink-800);
  border: 2px solid var(--black);
  border-top: 5px solid var(--ice);
  box-shadow: var(--shadow-hard);
  transition: transform .18s ease, border-top-color .18s ease;
}

.page-about .partner-card:nth-child(2) {
  border-top-color: var(--coral);
}

.page-about .partner-card:nth-child(3) {
  border-top-color: var(--lime);
}

.page-about .partner-card:hover {
  transform: translate(-2px, -2px);
}

.page-about .partner-card h3 {
  margin: 12px 0 8px;
  font-size: 1.02rem;
  line-height: 1.4;
  color: var(--white);
  letter-spacing: -.01em;
}

.page-about .partner-card p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: #C6D5E2;
}

.page-about .about-paper {
  margin-top: 18px;
  padding: clamp(18px, 3vw, 26px);
  background: var(--paper);
  color: var(--about-ink);
  border: 3px solid var(--black);
  box-shadow: var(--shadow-hard);
}

.page-about .about-paper__label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: .16em;
  color: #6B4A1F;
  text-transform: uppercase;
}

.page-about .about-paper__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .about-paper__list li {
  padding-left: 18px;
  position: relative;
  font-size: 14.5px;
  line-height: 1.7;
  color: #16293C;
}

.page-about .about-paper__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 8px;
  height: 8px;
  background: var(--orange);
}

.page-about .about-paper__list strong {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: #02090F;
}

/* ---------- 长期订阅 ---------- */

.page-about .about-why__grid {
  row-gap: clamp(22px, 3.6vw, 34px);
}

.page-about .about-why__lead {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-about .why-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-about .why-list li {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 12px;
  padding: 16px 16px 16px 14px;
  background: rgba(11, 39, 64, .54);
  border: 2px solid var(--about-line-soft);
  border-left: 3px solid var(--ice);
  transition: border-color .18s ease, background .18s ease;
}

.page-about .why-list li:hover {
  border-left-color: var(--orange);
  background: var(--ink-800);
}

.page-about .why-list__num {
  font-size: 18px;
  line-height: 1.2;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-about .why-list h3 {
  margin: 0 0 6px;
  font-size: .99rem;
  line-height: 1.4;
  color: var(--white);
  letter-spacing: -.01em;
}

.page-about .why-list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: #C6D5E2;
}

.page-about .about-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 28px);
}

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

/* ---------- 响应式 ---------- */

@media (min-width: 620px) {
  .page-about .hero-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

@media (min-width: 820px) {
  .page-about .season-row {
    grid-template-columns: 118px minmax(0, 1fr);
    align-items: start;
    padding: 18px 22px;
  }

  .page-about .season-row__phase {
    padding-top: 4px;
  }

  .page-about .release-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-about .review-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

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

@media (min-width: 900px) {
  .page-about .about-index {
    position: sticky;
    top: 108px;
    align-self: start;
  }

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

  .page-about .season-track::before {
    left: 6px;
  }
}

@media (min-width: 1040px) {
  .page-about .about-hero {
    padding-top: clamp(34px, 3.6vw, 56px);
  }

  .page-about .hero-figures li {
    padding: 18px 20px 20px;
  }
}
<<<END>>>

.page-about {
  --lmie: currentColor;
}