.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding-top: clamp(7rem, 16vw, 10rem);
  padding-bottom: clamp(3rem, 8vw, 5rem);
  background:
    radial-gradient(120% 95% at 92% 0%, rgba(255, 210, 63, .28) 0%, rgba(16, 37, 28, 0) 58%),
    radial-gradient(95% 80% at -5% 30%, rgba(244, 54, 76, .3) 0%, rgba(16, 37, 28, 0) 62%),
    var(--rind);
  color: var(--cream);
}

.page-about .about-hero-grid {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: center;
}

.page-about .about-hero .breadcrumbs {
  margin-bottom: 1.25rem;
}

.page-about .about-hero .breadcrumb-item,
.page-about .about-hero .breadcrumb-item a {
  color: rgba(255, 248, 236, .68);
  text-decoration: none;
}

.page-about .about-hero .breadcrumb-item a:hover {
  color: var(--lemon);
}

.page-about .about-hero .breadcrumb-current {
  color: var(--lemon);
}

.page-about .about-hero .eyebrow {
  color: var(--lemon);
}

.page-about .about-title {
  --sticker-line: var(--lemon);
  margin: .35rem 0 0;
  color: var(--cream);
  font-size: clamp(2.4rem, 9vw, 5rem);
  line-height: 1.06;
  letter-spacing: -.01em;
}

.page-about .about-lede {
  margin: 1.35rem 0 0;
  max-width: 34em;
  font-size: clamp(1rem, 2.6vw, 1.12rem);
  line-height: 1.85;
  color: rgba(255, 248, 236, .84);
}

.page-about .about-hero .cta-row {
  flex-wrap: wrap;
  gap: .85rem;
  margin-top: 1.85rem;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem 1.25rem;
  margin: 2rem 0 0;
  padding-top: 1.5rem;
  border-top: 2px dashed rgba(255, 248, 236, .3);
}

.page-about .about-stat dt {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--lemon);
  letter-spacing: .01em;
}

.page-about .about-stat dd {
  margin: .2rem 0 0;
  font-size: .82rem;
  color: rgba(255, 248, 236, .7);
}

.page-about .about-hero-figure {
  margin: 0;
}

.page-about .about-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1280 / 760;
  object-fit: cover;
  border: 3px solid var(--lemon);
  border-radius: var(--radius);
  box-shadow: 10px 10px 0 var(--watermelon);
}

/* ---------- 主体两栏 ---------- */

.page-about .about-body {
  display: grid;
  gap: clamp(2rem, 5vw, 3rem);
  padding-top: clamp(3rem, 8vw, 5rem);
  padding-bottom: clamp(2.5rem, 7vw, 4.5rem);
}

.page-about .about-rail {
  display: none;
}

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

.page-about .about-section + .about-section {
  margin-top: clamp(2.75rem, 7vw, 4.5rem);
}

.page-about .about-section .section-head {
  position: relative;
  padding-left: 1.05rem;
}

.page-about .about-section .section-head::before {
  content: "";
  position: absolute;
  left: 0;
  top: .3rem;
  bottom: .3rem;
  width: 8px;
  border-radius: 4px;
  background: var(--watermelon);
}

.page-about .about-section:nth-of-type(2) .section-head::before {
  background: var(--lemon);
}

.page-about .about-section:nth-of-type(3) .section-head::before {
  background: var(--ice);
}

.page-about .about-section:nth-of-type(4) .section-head::before {
  background: var(--peach);
}

.page-about .about-section:nth-of-type(5) .section-head::before {
  background: var(--lime);
}

.page-about .about-section h2 {
  margin: .4rem 0 0;
  font-size: clamp(1.45rem, 4.2vw, 2.05rem);
  line-height: 1.32;
  color: var(--rind);
}

.page-about .about-section .section-lede {
  margin-top: .6rem;
}

.page-about .about-section .prose {
  margin-top: 1.15rem;
}

.page-about .about-quote {
  margin: 1.85rem 0 0;
  padding: 1.15rem 1.3rem;
  background: var(--lemon);
  border: 3px solid var(--rind);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hard);
  color: var(--rind);
  font-size: clamp(1.15rem, 3.6vw, 1.6rem);
  font-weight: 800;
  line-height: 1.5;
}

/* ---------- 阶段时间轴 ---------- */

.page-about .stage-timeline {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.1rem;
}

.page-about .stage-item {
  position: relative;
  display: grid;
  grid-template-columns: 3.4rem minmax(0, 1fr);
  gap: .9rem;
  padding: 1.15rem 1.2rem 1.15rem 1.5rem;
  background: var(--cream);
  border: 3px solid var(--rind);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
  transition: transform .18s var(--ease-out), box-shadow .18s var(--ease-out);
}

.page-about .stage-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 8px;
  border-radius: 11px 0 0 11px;
  background: var(--lemon);
}

.page-about .stage-item:nth-child(2)::before {
  background: var(--ice);
}

.page-about .stage-item:nth-child(3)::before {
  background: var(--peach);
}

.page-about .stage-item:nth-child(4)::before {
  background: var(--lime);
}

.page-about .stage-item:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-hard);
}

.page-about .stage-num {
  font-size: 1.6rem;
  font-weight: 700;
  line-height: 1;
  color: var(--rind);
  letter-spacing: -.02em;
  padding-bottom: .25rem;
  border-bottom: 4px solid var(--watermelon);
  align-self: start;
}

.page-about .stage-content h3 {
  margin: 0 0 .45rem;
  font-size: 1.12rem;
  color: var(--rind);
}

.page-about .stage-content p {
  margin: 0;
  font-size: .96rem;
  line-height: 1.8;
  color: var(--rind-2);
}

/* ---------- 档位关系图 ---------- */

.page-about .rel-diagram {
  display: grid;
  gap: 1rem;
  margin-top: 1.7rem;
}

.page-about .rel-row {
  display: grid;
  gap: .55rem;
  align-items: center;
  padding: .85rem;
  background: var(--paper);
  border: 3px solid var(--rind);
  border-radius: var(--radius);
  transition: transform .18s var(--ease-out), box-shadow .18s var(--ease-out);
}

.page-about .rel-row:hover {
  transform: translate(-3px, -3px);
  box-shadow: var(--shadow-soft);
}

.page-about .rel-link {
  display: block;
  height: 4px;
  border-radius: 3px;
  background: linear-gradient(90deg, var(--watermelon), var(--lemon), var(--ice));
}

.page-about .rel-card {
  display: grid;
  gap: .2rem;
  padding: .7rem .85rem;
  background: var(--cream);
  border: 2px solid var(--rind);
  border-radius: var(--radius-sm);
}

.page-about .rel-card--tier {
  background: var(--lemon);
}

.page-about .rel-code {
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--rind-2);
}

.page-about .rel-name {
  font-size: .95rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--rind);
}

/* ---------- 工作流程 ---------- */

.page-about .flow-list {
  list-style: none;
  margin: 1.6rem 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.page-about .flow-item {
  position: relative;
  padding: 1.05rem 1.15rem;
  background: var(--paper);
  border: 3px solid var(--rind);
  border-radius: var(--radius);
}

.page-about .flow-item:nth-child(odd) {
  box-shadow: var(--shadow-soft);
}

.page-about .flow-code {
  display: inline-block;
  padding: .12rem .5rem;
  margin-bottom: .5rem;
  font-size: .68rem;
  letter-spacing: .1em;
  color: var(--rind);
  background: var(--cream);
  border: 2px solid var(--rind);
  border-radius: 999px;
}

.page-about .flow-item h3 {
  margin: 0 0 .35rem;
  font-size: 1.05rem;
  color: var(--rind);
}

.page-about .flow-item p {
  margin: 0;
  font-size: .94rem;
  line-height: 1.75;
  color: var(--rind-2);
}

/* ---------- 配图 ---------- */

.page-about .about-figure {
  margin: 1.85rem 0 0;
}

.page-about .about-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 3px solid var(--rind);
  border-radius: var(--radius);
  box-shadow: var(--shadow-soft);
}

.page-about .about-figure figcaption {
  margin-top: .7rem;
  font-size: .82rem;
  line-height: 1.7;
  color: var(--muted);
}

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

/* ---------- 三类玩家 ---------- */

.page-about .player-grid {
  display: grid;
  gap: 1.15rem;
  margin-top: 1.6rem;
}

.page-about .about-player p {
  margin: .5rem 0 0;
  font-size: .93rem;
  line-height: 1.75;
  color: var(--rind-2);
}

/* ---------- 收尾 ---------- */

.page-about .about-cta {
  margin-top: clamp(2rem, 6vw, 3.5rem);
  padding: clamp(2.6rem, 7vw, 4.2rem) 0;
  background:
    radial-gradient(110% 130% at 100% 0%, rgba(255, 155, 87, .28) 0%, rgba(16, 37, 28, 0) 60%),
    var(--rind);
  color: var(--cream);
}

.page-about .about-cta h2 {
  margin: 0;
  max-width: 24em;
  font-size: clamp(1.35rem, 4.4vw, 2rem);
  line-height: 1.4;
  color: var(--cream);
}

.page-about .about-cta p {
  margin: 1rem 0 0;
  max-width: 36em;
  font-size: .98rem;
  line-height: 1.8;
  color: rgba(255, 248, 236, .82);
}

.page-about .about-cta .cta-row {
  flex-wrap: wrap;
  gap: .85rem;
  margin-top: 1.75rem;
}

/* ---------- 响应式 ---------- */

@media (min-width: 560px) {
  .page-about .about-stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .about-stat dt {
    font-size: 1.05rem;
  }

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

@media (min-width: 720px) {
  .page-about .rel-row {
    grid-template-columns: minmax(0, 1fr) 3rem minmax(0, 1fr);
  }

  .page-about .rel-link {
    background: linear-gradient(90deg, var(--watermelon), var(--lemon));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }

  .page-about .about-hero-figure {
    margin-right: calc(var(--gutter) * -1);
  }
}

@media (min-width: 1024px) {
  .page-about .about-body {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 3.5rem;
  }

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

  .page-about .about-rail .rail-title {
    margin: 0 0 .75rem;
    padding-left: .85rem;
    font-size: .78rem;
    letter-spacing: .12em;
    color: var(--muted);
  }

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

  .page-about .about-rail .rail-link {
    display: block;
    padding: .5rem 0 .5rem .85rem;
    border-left: 3px solid var(--paper);
    font-size: .9rem;
    line-height: 1.5;
    color: var(--muted);
    text-decoration: none;
    transition: color .15s var(--ease-out), border-color .15s var(--ease-out);
  }

  .page-about .about-rail .rail-link:hover {
    color: var(--rind);
    border-left-color: var(--ice);
  }

  .page-about .about-rail .rail-link[aria-current="true"] {
    color: var(--rind);
    font-weight: 700;
    border-left-color: var(--watermelon);
  }

  .page-about .stage-item {
    grid-template-columns: 4rem minmax(0, 1fr);
    gap: 1.2rem;
    padding: 1.35rem 1.4rem 1.35rem 1.7rem;
  }

  .page-about .stage-num {
    font-size: 1.9rem;
  }

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

@media (min-width: 1180px) {
  .page-about .about-figure--wide img {
    aspect-ratio: 1000 / 560;
  }
}