.page-about {
  --about-rule: rgba(147, 163, 180, 0.2);
  --about-index-w: 172px;
  position: relative;
}

/* ---------- 首屏 ---------- */

.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(78px, 11vw, 140px) var(--gutter) clamp(52px, 7vw, 88px);
  background:
    radial-gradient(125% 95% at 82% 0%, rgba(59, 30, 90, 0.72), transparent 62%),
    linear-gradient(180deg, var(--ink-deep) 0%, var(--ink-black) 100%);
}

.page-about .about-hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(242, 169, 0, 0.55), transparent);
}

.page-about .about-hero__glow {
  position: absolute;
  top: 8%;
  right: -140px;
  width: 440px;
  height: 440px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(242, 169, 0, 0.18), transparent 68%);
  pointer-events: none;
}

.page-about .about-hero__inner {
  position: relative;
  z-index: 1;
  max-width: var(--content-max);
  margin: 0 auto;
}

.page-about .about-hero .breadcrumbs {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-about .about-hero .eyebrow {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-about .about-hero h1 {
  margin: 0;
  font-size: clamp(30px, 8vw, 88px);
  font-weight: 300;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-about .about-hero h1 em {
  display: block;
  font-style: normal;
  font-weight: 900;
  letter-spacing: -0.03em;
  background: linear-gradient(96deg, var(--amber) 12%, var(--amber-soft) 58%, var(--cyan) 130%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-hero__lead {
  max-width: 44ch;
  margin: clamp(24px, 3.4vw, 38px) 0 0;
  font-size: clamp(16px, 1.35vw, 18px);
  line-height: 1.82;
  color: rgba(232, 237, 242, 0.82);
}

.page-about .about-figures {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin: clamp(38px, 5.5vw, 64px) 0 0;
  padding: 1px;
  background: var(--about-rule);
  border-radius: 18px 8px 20px 10px;
  overflow: hidden;
}

.page-about .about-figures__item {
  padding: clamp(16px, 2.2vw, 24px);
  background: linear-gradient(160deg, rgba(14, 37, 64, 0.92), rgba(11, 27, 43, 0.96));
}

.page-about .about-figures dt {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--gray);
}

.page-about .about-figures dd {
  margin: 0;
  display: flex;
  align-items: baseline;
  gap: 4px;
  color: var(--mist);
}

.page-about .about-figures__num {
  font-family: var(--font-mono);
  font-size: clamp(28px, 3.6vw, 42px);
  font-weight: 500;
  line-height: 1;
  color: var(--amber);
}

.page-about .about-figures__unit {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--gray);
}

/* ---------- 档案骨架 ---------- */

.page-about .arch {
  max-width: var(--page-max);
  margin: 0 auto;
  padding: clamp(40px, 6vw, 76px) var(--gutter) clamp(60px, 9vw, 120px);
}

.page-about .arch-index {
  margin-bottom: 30px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--about-rule);
}

.page-about .arch-index__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--gray);
}

.page-about .arch-index__list {
  display: flex;
  gap: 6px;
  margin: 0;
  padding: 2px 0 6px;
  list-style: none;
  overflow-x: auto;
  scrollbar-width: none;
}

.page-about .arch-index__list::-webkit-scrollbar {
  display: none;
}

.page-about .arch-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 2px;
  white-space: nowrap;
  font-size: 14px;
  color: var(--gray);
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.page-about .arch-index__link:hover,
.page-about .arch-index__link:focus-visible {
  color: var(--mist);
  border-bottom-color: var(--amber);
}

.page-about .arch-index__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--amber);
}

.page-about .arch-body {
  min-width: 0;
}

/* ---------- 章节 ---------- */

.page-about .arch-section {
  margin-bottom: clamp(52px, 8vw, 104px);
  scroll-margin-top: calc(var(--header-height) + 32px);
}

.page-about .arch-band {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 11px 18px;
  margin-bottom: clamp(24px, 3vw, 38px);
  border-left: 3px solid var(--amber);
  border-radius: 0 20px 20px 0;
  background: linear-gradient(90deg, var(--violet) 0%, rgba(59, 30, 90, 0.28) 58%, transparent 100%);
}

.page-about .arch-band__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--amber);
  flex: none;
}

.page-about .arch-band h2 {
  margin: 0;
  font-size: clamp(20px, 2.5vw, 30px);
  font-weight: 600;
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .arch-cols {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
}

.page-about .arch-prose p {
  max-width: 40em;
  margin: 0 0 1.1em;
  font-size: 17px;
  line-height: 1.78;
  color: rgba(232, 237, 242, 0.84);
}

.page-about .arch-prose p:last-child {
  margin-bottom: 0;
}

.page-about .arch-prose--wide {
  margin-bottom: clamp(22px, 3vw, 34px);
}

.page-about .arch-prose a {
  color: var(--amber-soft);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 201, 77, 0.42);
  transition: color var(--transition), border-color var(--transition);
}

.page-about .arch-prose a:hover,
.page-about .arch-prose a:focus-visible {
  color: var(--mist);
  border-bottom-color: var(--amber);
}

.page-about .arch-figure {
  margin: 0;
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-organic);
  overflow: hidden;
  background: var(--navy-mid);
  box-shadow: var(--shadow-panel);
}

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

.page-about .arch-figure__caption {
  padding: 12px 16px 14px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--gray);
  background: rgba(7, 19, 32, 0.7);
  border-top: 1px solid var(--about-rule);
}

.page-about .arch-inline-link {
  margin: clamp(20px, 3vw, 30px) 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(232, 237, 242, 0.72);
}

.page-about .arch-inline-link a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 195, 0.42);
  transition: color var(--transition), border-color var(--transition);
}

.page-about .arch-inline-link a:hover,
.page-about .arch-inline-link a:focus-visible {
  color: var(--mist);
  border-bottom-color: var(--cyan);
}

/* ---------- 团队条形图 ---------- */

.page-about .team-scale {
  display: grid;
  gap: 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .team-scale__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  margin-bottom: 9px;
}

.page-about .team-scale__name {
  font-size: 15px;
  color: var(--mist);
}

.page-about .team-scale__num {
  font-size: 20px;
  color: var(--amber);
}

.page-about .team-scale__track {
  height: 10px;
  border-radius: 999px;
  background: rgba(147, 163, 180, 0.14);
  overflow: hidden;
}

.page-about .team-scale__fill {
  display: block;
  height: 100%;
  border-radius: 999px;
  transition: filter var(--transition);
}

.page-about .team-scale__fill--a {
  width: 47.7%;
  background: linear-gradient(90deg, var(--amber), var(--amber-soft));
}

.page-about .team-scale__fill--b {
  width: 20.9%;
  background: linear-gradient(90deg, var(--cyan), rgba(0, 229, 195, 0.55));
}

.page-about .team-scale__fill--c {
  width: 14%;
  background: linear-gradient(90deg, #7A5BB0, var(--violet));
}

.page-about .team-scale__fill--d {
  width: 17.4%;
  background: linear-gradient(90deg, var(--gray), rgba(147, 163, 180, 0.4));
}

.page-about .team-scale__note {
  margin: 9px 0 0;
  font-size: 13px;
  line-height: 1.68;
  color: var(--gray);
}

.page-about .team-scale__row:hover .team-scale__fill,
.page-about .team-scale__row:focus-within .team-scale__fill {
  filter: brightness(1.18);
}

/* ---------- 三步流程 ---------- */

.page-about .flow {
  position: relative;
  margin: clamp(30px, 4vw, 48px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .flow__step {
  position: relative;
  padding: 0 0 32px 42px;
}

.page-about .flow__step::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 26px;
  bottom: -2px;
  width: 2px;
  background: linear-gradient(180deg, var(--amber), rgba(242, 169, 0, 0.1));
}

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

.page-about .flow__step:last-child::before {
  display: none;
}

.page-about .flow__dot {
  position: absolute;
  left: 4px;
  top: 6px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--ink-deep);
  border: 2px solid var(--amber);
  box-shadow: 0 0 0 4px rgba(242, 169, 0, 0.12);
  transition: background var(--transition), box-shadow var(--transition);
}

.page-about .flow__step:hover .flow__dot,
.page-about .flow__step:focus-within .flow__dot {
  background: var(--amber);
  box-shadow: 0 0 0 8px rgba(242, 169, 0, 0.16);
}

.page-about .flow__num {
  margin: 0 0 6px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--gray);
}

.page-about .flow__title {
  margin: 0 0 8px;
  font-size: 21px;
  font-weight: 600;
  color: var(--mist);
}

.page-about .flow__text {
  max-width: 38em;
  margin: 0 0 12px;
  font-size: 15.5px;
  line-height: 1.78;
  color: rgba(232, 237, 242, 0.78);
}

.page-about .flow__out {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 7px 14px;
  font-size: 13px;
  color: var(--cyan);
  background: rgba(0, 229, 195, 0.07);
  border: 1px solid rgba(0, 229, 195, 0.26);
  border-radius: 999px;
}

.page-about .flow__out-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  flex: none;
}

/* ---------- 内容分类 ---------- */

.page-about .column-list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 1px;
  list-style: none;
  background: var(--about-rule);
  border-radius: 20px 10px 22px 12px;
  overflow: hidden;
}

.page-about .column-list__item {
  padding: clamp(16px, 2.2vw, 22px) clamp(16px, 2.4vw, 26px);
  background: linear-gradient(120deg, rgba(14, 37, 64, 0.86), rgba(11, 27, 43, 0.94));
  transition: background var(--transition);
}

.page-about .column-list__item:hover {
  background: linear-gradient(120deg, rgba(59, 30, 90, 0.6), rgba(14, 37, 64, 0.94));
}

.page-about .column-list__tag {
  display: inline-block;
  margin-bottom: 8px;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--amber);
  border: 1px solid rgba(242, 169, 0, 0.34);
  border-radius: 999px;
}

.page-about .column-list__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.76;
  color: rgba(232, 237, 242, 0.78);
}

/* ---------- 合作与认可 ---------- */

.page-about .partner-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: clamp(16px, 2.4vw, 26px);
}

.page-about .partner-item {
  padding: clamp(18px, 2.4vw, 26px);
  border: 1px solid var(--about-rule);
  border-radius: var(--radius-panel);
  background: linear-gradient(150deg, rgba(14, 37, 64, 0.7), rgba(11, 27, 43, 0.9));
  transition: border-color var(--transition), box-shadow var(--transition);
}

.page-about .partner-item:hover {
  border-color: rgba(242, 169, 0, 0.55);
  box-shadow: 0 18px 46px rgba(0, 0, 0, 0.4);
}

.page-about .partner-item__num {
  display: block;
  margin-bottom: 12px;
  font-size: clamp(30px, 3.4vw, 40px);
  line-height: 1;
  color: var(--amber);
}

.page-about .partner-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: rgba(232, 237, 242, 0.76);
}

.page-about .honor-list {
  display: grid;
  gap: 10px;
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  padding: 0;
  list-style: none;
}

.page-about .honor-list__item {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(232, 237, 242, 0.7);
}

.page-about .honor-list__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  flex: none;
  transform: translateY(-2px);
}

/* ---------- 时间线 ---------- */

.page-about .tl {
  position: relative;
  margin-top: clamp(22px, 3vw, 34px);
  border-radius: var(--radius-panel);
  overflow: hidden;
}

.page-about .tl__backdrop {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-about .tl__backdrop img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.28;
}

.page-about .tl__backdrop::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 19, 32, 0.72) 0%, rgba(11, 27, 43, 0.94) 100%);
}

.page-about .tl__scroller {
  position: relative;
  z-index: 1;
  overflow-x: auto;
  padding: clamp(24px, 3.4vw, 36px) clamp(16px, 2.4vw, 28px) clamp(18px, 2.4vw, 26px);
  scroll-snap-type: x proximity;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--amber) rgba(147, 163, 180, 0.2);
}

.page-about .tl__scroller:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-about .tl__track {
  display: flex;
  gap: clamp(14px, 2vw, 20px);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-about .tl__item {
  flex: 0 0 min(300px, 76vw);
  scroll-snap-align: start;
  padding: 20px 20px 24px;
  border: 1px solid rgba(147, 163, 180, 0.18);
  border-top: 3px solid var(--amber);
  border-radius: 20px 10px 22px 12px;
  background: linear-gradient(160deg, rgba(14, 37, 64, 0.92), rgba(11, 27, 43, 0.9));
  transition: border-color var(--transition), background var(--transition);
}

.page-about .tl__item:hover {
  border-color: rgba(242, 169, 0, 0.6);
  border-top-color: var(--cyan);
  background: linear-gradient(160deg, rgba(59, 30, 90, 0.72), rgba(14, 37, 64, 0.94));
}

.page-about .tl__ver {
  display: block;
  margin-bottom: 12px;
  font-size: 24px;
  letter-spacing: 0.02em;
  color: var(--amber);
}

.page-about .tl__title {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 600;
  color: var(--mist);
}

.page-about .tl__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.76;
  color: rgba(232, 237, 242, 0.74);
}

.page-about .tl__hint {
  position: relative;
  z-index: 1;
  margin: 0;
  padding: 0 clamp(16px, 2.4vw, 28px) clamp(18px, 2.4vw, 26px);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--gray);
}

/* ---------- 结尾 ---------- */

.page-about .about-outro {
  padding: clamp(28px, 4vw, 46px);
  border: 1px solid rgba(242, 169, 0, 0.3);
  border-radius: var(--radius-organic);
  background:
    radial-gradient(120% 130% at 0% 0%, rgba(59, 30, 90, 0.68), transparent 62%),
    linear-gradient(160deg, rgba(14, 37, 64, 0.88), rgba(11, 27, 43, 0.96));
  box-shadow: var(--shadow-panel);
}

.page-about .about-outro__title {
  margin: 0 0 16px;
  font-size: clamp(24px, 3.2vw, 36px);
  font-weight: 300;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--mist);
}

.page-about .about-outro__text {
  max-width: 44em;
  margin: 0 0 clamp(22px, 3vw, 30px);
  font-size: 16px;
  line-height: 1.8;
  color: rgba(232, 237, 242, 0.78);
}

.page-about .about-outro__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 720px) {
  .page-about .about-figures {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-about .arch-cols {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.8fr);
    align-items: start;
  }

  .page-about .arch-cols--flip {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1fr);
  }

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

@media (min-width: 980px) {
  .page-about .arch {
    display: grid;
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    gap: clamp(34px, 4.5vw, 76px);
    align-items: start;
  }

  .page-about .arch-index {
    position: sticky;
    top: calc(var(--header-height) + 30px);
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: 0;
    border-left: 1px solid var(--about-rule);
  }

  .page-about .arch-index__list {
    flex-direction: column;
    gap: 2px;
    overflow: visible;
    padding: 0;
  }

  .page-about .arch-index__link {
    padding: 8px 0 8px 14px;
    border-bottom: 0;
    border-left: 2px solid transparent;
    margin-left: -1px;
  }

  .page-about .arch-index__link:hover,
  .page-about .arch-index__link:focus-visible {
    border-left-color: var(--amber);
    background: rgba(242, 169, 0, 0.06);
  }

  .page-about .flow {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(18px, 2.6vw, 34px);
  }

  .page-about .flow__step {
    padding: 34px 0 0;
  }

  .page-about .flow__step::before {
    left: 24px;
    right: -34px;
    top: 11px;
    bottom: auto;
    width: auto;
    height: 2px;
    background: linear-gradient(90deg, var(--amber), rgba(242, 169, 0, 0.14));
  }

  .page-about .flow__step:last-child::before {
    display: block;
    right: 0;
  }

  .page-about .flow__dot {
    left: 4px;
    top: 4px;
  }

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

@media (min-width: 1200px) {
  .page-about .tl__item {
    flex: 0 0 300px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .arch-index__link,
  .page-about .arch-prose a,
  .page-about .arch-inline-link a,
  .page-about .team-scale__fill,
  .page-about .flow__dot,
  .page-about .column-list__item,
  .page-about .partner-item,
  .page-about .tl__item {
    transition: none;
  }
}