.page-about {
  --about-rail: 208px;
  --about-gap: clamp(24px, 4vw, 56px);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  padding: clamp(24px, 4vw, 52px) 0 clamp(32px, 5vw, 64px);
  border-bottom: 1px solid var(--line);
  background:
    radial-gradient(110% 130% at 92% 0%, rgba(245, 166, 35, 0.12), transparent 58%),
    radial-gradient(80% 100% at 4% 100%, rgba(111, 175, 159, 0.10), transparent 60%),
    linear-gradient(180deg, var(--ink) 0%, var(--navy) 100%);
  overflow: hidden;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
  opacity: 0.55;
}

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

.page-about .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 30px);
}

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(20px, 3vw, 40px);
}

.page-about .about-hero__text {
  max-width: 68ch;
}

.page-about .about-hero h1 {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.12;
  font-size: clamp(1.85rem, 5.2vw, 3.35rem);
  color: var(--paper);
}

.page-about .about-hero .lede {
  margin-top: clamp(14px, 2vw, 22px);
  font-family: var(--font-body);
  font-size: clamp(0.98rem, 1.6vw, 1.1rem);
  line-height: 1.9;
  color: var(--silver);
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 32px);
}

/* ---------- 图片容器 ---------- */
.page-about .about-figure {
  position: relative;
  margin: 0;
  border: 2px solid var(--slate);
  background: linear-gradient(160deg, var(--navy), var(--ink));
  box-shadow: var(--shadow-deep);
  overflow: hidden;
}

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

.page-about .about-figure--wide {
  margin-top: clamp(28px, 4vw, 48px);
  aspect-ratio: 1600 / 700;
}

.page-about .about-figure--tall {
  aspect-ratio: 800 / 500;
}

.page-about .about-figure--square {
  aspect-ratio: 800 / 600;
}

.page-about .about-figure__cap {
  position: absolute;
  left: 0;
  bottom: 0;
  padding: 8px 14px;
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--gold-lt);
  background: rgba(11, 18, 25, 0.82);
  border-top: 1px solid var(--gold);
  border-right: 1px solid var(--gold);
}

/* ---------- 主体两栏 ---------- */
.page-about .about-layout {
  display: grid;
  gap: var(--about-gap);
  padding-block: clamp(36px, 5vw, 72px) clamp(48px, 6vw, 96px);
}

.page-about .about-toc {
  align-self: start;
  padding-bottom: 4px;
}

.page-about .about-toc__title {
  margin: 0 0 12px;
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  color: var(--gold);
}

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

.page-about .about-toc__list a {
  display: block;
  padding: 7px 13px;
  font-family: var(--font-head);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--silver);
  text-decoration: none;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(19, 38, 61, 0.6);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-about .about-toc__list a:hover,
.page-about .about-toc__list a:focus-visible {
  color: var(--ink);
  background: var(--gold);
  border-color: var(--gold);
}

@media (min-width: 1024px) {
  .page-about .about-layout {
    grid-template-columns: var(--about-rail) minmax(0, 1fr);
  }

  .page-about .about-toc {
    position: sticky;
    top: calc(var(--header-h) + 24px);
  }

  .page-about .about-toc__list {
    flex-direction: column;
    gap: 0;
    border-left: 2px solid var(--slate);
  }

  .page-about .about-toc__list li + li {
    margin-top: 2px;
  }

  .page-about .about-toc__list a {
    border: 0;
    border-radius: 0;
    background: none;
    padding: 9px 12px;
    font-size: 0.86rem;
    border-left: 3px solid transparent;
    margin-left: -2px;
  }

  .page-about .about-toc__list a:hover,
  .page-about .about-toc__list a:focus-visible {
    color: var(--gold);
    background: rgba(245, 166, 35, 0.07);
    border-left-color: var(--gold);
  }
}

/* ---------- 章节节奏 ---------- */
.page-about .about-body {
  min-width: 0;
  display: grid;
  gap: clamp(36px, 5vw, 68px);
}

.page-about .about-section {
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.page-about .about-section + .about-section {
  padding-top: clamp(28px, 4vw, 52px);
  border-top: 1px solid var(--line-soft);
}

.page-about .about-section .section-title {
  margin: 10px 0 0;
  font-size: clamp(1.4rem, 3.3vw, 2.15rem);
  line-height: 1.24;
}

.page-about .about-lede {
  margin: clamp(14px, 2vw, 20px) 0 0;
  max-width: 62ch;
  font-family: var(--font-body);
  line-height: 1.9;
  color: var(--silver);
}

.page-about .about-body .prose p {
  max-width: 64ch;
}

.page-about .about-subtitle {
  margin: clamp(30px, 4vw, 48px) 0 16px;
  font-family: var(--font-head);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.2em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-about .about-more {
  margin-top: clamp(20px, 3vw, 30px);
  font-family: var(--font-body);
  line-height: 1.85;
  color: var(--silver);
}

.page-about .about-more a {
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 166, 35, 0.42);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-about .about-more a:hover,
.page-about .about-more a:focus-visible {
  color: var(--gold-lt);
  border-bottom-color: var(--gold-lt);
}

/* ---------- 三要点 ---------- */
.page-about .about-points {
  display: grid;
  gap: 14px;
  margin: clamp(24px, 3vw, 36px) 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 700px) {
  .page-about .about-points {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-point {
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-left: 4px solid var(--celadon);
  background: rgba(19, 38, 61, 0.55);
  box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.32);
}

.page-about .about-point__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-point p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--silver);
}

/* ---------- 十二类目 ---------- */
.page-about .about-cats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 680px) {
  .page-about .about-cats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1180px) {
  .page-about .about-cats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.page-about .about-cat {
  position: relative;
  min-width: 0;
  padding: 14px 14px 16px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--cat-accent, var(--gold));
  background: linear-gradient(180deg, rgba(19, 38, 61, 0.92), rgba(11, 18, 25, 0.94));
  box-shadow: 4px 4px 0 rgba(0, 0, 0, 0.34);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-cat:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hard);
  border-color: var(--cat-accent, var(--gold));
}

.page-about .about-cat__no {
  display: block;
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--cat-accent, var(--gold));
}

.page-about .about-cat__name {
  margin: 6px 0 8px;
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-cat p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.83rem;
  line-height: 1.75;
  color: var(--silver);
}

.page-about .about-cat.cat-1 { --cat-accent: #F5A623; }
.page-about .about-cat.cat-2 { --cat-accent: #6FAF9F; }
.page-about .about-cat.cat-3 { --cat-accent: #D64545; }
.page-about .about-cat.cat-4 { --cat-accent: #1F4E5F; }
.page-about .about-cat.cat-5 { --cat-accent: #A8B2C1; }
.page-about .about-cat.cat-6 { --cat-accent: #FFD79A; }
.page-about .about-cat.cat-7 { --cat-accent: #5B7FA6; }
.page-about .about-cat.cat-8 { --cat-accent: #7B61A8; }
.page-about .about-cat.cat-9 { --cat-accent: #4C9A8A; }
.page-about .about-cat.cat-10 { --cat-accent: #C97B4A; }
.page-about .about-cat.cat-11 { --cat-accent: #2A3B52; }
.page-about .about-cat.cat-12 { --cat-accent: #8A8F98; }

/* ---------- 资料库区块 ---------- */
.page-about .about-section--panel {
  padding: clamp(22px, 3vw, 36px) clamp(18px, 3vw, 34px) clamp(28px, 4vw, 42px);
  border: 1px solid var(--line);
  border-top: 4px solid var(--gold);
  background:
    linear-gradient(160deg, rgba(19, 38, 61, 0.85), rgba(11, 18, 25, 0.92));
  box-shadow: var(--shadow-deep);
}

.page-about .about-section--panel + .about-section {
  padding-top: 0;
  border-top: 0;
}

.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

@media (min-width: 760px) {
  .page-about .about-stats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-stat {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
  padding: 18px 16px 20px;
  background: var(--ink);
  transition: background 0.25s var(--ease);
}

.page-about .about-stat:hover {
  background: var(--navy);
}

.page-about .about-stat__num {
  font-size: clamp(1.5rem, 3.4vw, 2.05rem);
  font-weight: 700;
  line-height: 1;
  color: var(--gold);
}

.page-about .about-stat__unit {
  font-size: 0.62em;
  margin-left: 2px;
  color: var(--gold-lt);
}

.page-about .about-stat__label {
  font-family: var(--font-body);
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--silver);
}

.page-about .about-ways {
  display: grid;
  gap: 14px;
  margin: clamp(24px, 3vw, 34px) 0 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 860px) {
  .page-about .about-ways {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-way {
  padding: 16px 16px 18px;
  border: 1px solid var(--line);
  border-bottom: 3px solid var(--teal);
  background: rgba(11, 18, 25, 0.7);
}

.page-about .about-way__title {
  margin: 0 0 8px;
  font-family: var(--font-head);
  font-size: 0.98rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-way p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.85rem;
  line-height: 1.78;
  color: var(--silver);
}

/* ---------- 团队 ---------- */
.page-about .about-split {
  display: grid;
  gap: clamp(20px, 3vw, 36px);
  margin-top: clamp(20px, 3vw, 30px);
}

@media (min-width: 860px) {
  .page-about .about-split {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }
}

.page-about .about-split__text p {
  margin-top: 0;
}

.page-about .about-eco {
  display: grid;
  gap: clamp(20px, 3vw, 34px);
  margin-top: clamp(30px, 4vw, 48px);
  padding-top: clamp(24px, 3vw, 36px);
  border-top: 1px dashed var(--line);
}

@media (min-width: 860px) {
  .page-about .about-eco {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: center;
  }
}

.page-about .about-eco__title {
  margin: 0 0 14px;
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--paper);
}

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

.page-about .about-eco__list li {
  position: relative;
  padding: 10px 0 10px 0;
  font-family: var(--font-body);
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--silver);
  border-bottom: 1px solid var(--line-soft);
}

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

.page-about .about-eco__list .mono {
  display: inline-block;
  min-width: 2.4em;
  margin-right: 6px;
  color: var(--celadon);
  font-weight: 700;
}

/* ---------- 阶段时间轴 ---------- */
.page-about .about-stages {
  margin: clamp(24px, 3vw, 34px) 0 0;
}

.page-about .about-stage {
  min-width: 232px;
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-top: 3px solid var(--gold);
  background: rgba(19, 38, 61, 0.6);
  box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.32);
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), border-color 0.25s var(--ease);
}

.page-about .about-stage:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hard);
  border-color: var(--gold);
}

.page-about .about-stage__no {
  display: block;
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-about .about-stage__title {
  margin: 8px 0 10px;
  font-family: var(--font-head);
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--paper);
}

.page-about .about-stage p {
  margin: 0;
  font-family: var(--font-body);
  font-size: 0.85rem;
  line-height: 1.8;
  color: var(--silver);
}

/* ---------- 荣誉 ---------- */
.page-about .about-honors {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

@media (min-width: 760px) {
  .page-about .about-honors {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-about .about-honor {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  padding: 13px 14px 15px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--gold-lt);
  background: rgba(11, 18, 25, 0.72);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-about .about-honor:hover {
  transform: translateY(-3px);
  border-left-color: var(--gold);
  background: rgba(19, 38, 61, 0.88);
}

.page-about .about-honor__mark {
  font-size: 0.66rem;
  letter-spacing: 0.14em;
  color: var(--silver);
}

.page-about .about-honor__name {
  font-family: var(--font-head);
  font-size: 0.88rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}

/* ---------- 收尾 ---------- */
.page-about .about-cta {
  margin-top: clamp(12px, 2vw, 24px);
}

.page-about .about-cta__inner {
  padding: clamp(24px, 3.5vw, 42px);
  border: 2px solid var(--slate);
  background:
    linear-gradient(120deg, rgba(245, 166, 35, 0.14), rgba(19, 38, 61, 0.5) 42%, rgba(11, 18, 25, 0.9));
  box-shadow: var(--shadow-hard);
}

.page-about .about-cta__title {
  margin: 0 0 clamp(18px, 2.5vw, 26px);
  font-family: var(--font-head);
  font-size: clamp(1.15rem, 2.6vw, 1.6rem);
  font-weight: 800;
  line-height: 1.35;
  color: var(--paper);
}

.page-about .about-cta__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

@media (max-width: 480px) {
  .page-about .about-hero__actions,
  .page-about .about-cta__links {
    flex-direction: column;
    align-items: stretch;
  }

  .page-about .about-hero__actions .btn,
  .page-about .about-cta__links .btn {
    text-align: center;
  }

  .page-about .about-stat__num {
    font-size: 1.35rem;
  }
}