.page-about {
  position: relative;
  padding-bottom: clamp(48px, 7vw, 96px);
}

.page-about::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(31, 60, 42, .45) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(31, 60, 42, .45) 1px, transparent 1px);
  background-size: 84px 84px;
  opacity: .55;
}

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

/* ---------- 首屏 ---------- */
.page-about .about-mast {
  padding-top: calc(var(--header-h) + clamp(24px, 5vw, 60px));
  padding-bottom: clamp(24px, 4vw, 48px);
}

.page-about .about-mast__grid {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
  margin-top: clamp(18px, 3vw, 32px);
}

.page-about .about-h1 {
  margin: 14px 0 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 58px);
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--white);
}

.page-about .about-mast__lead .lede {
  margin-top: 18px;
  max-width: 54ch;
}

.page-about .about-mast__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-about .about-mast__figure {
  margin: 0;
}

.page-about .figure__frame {
  overflow: hidden;
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: linear-gradient(155deg, var(--pitch-2) 0%, var(--ink) 100%);
}

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

.page-about .about-mast__figure .figure__frame {
  aspect-ratio: 16 / 9;
}

@media (min-width: 960px) {
  .page-about .about-mast__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: center;
  }
}

/* ---------- 章节导航条 ---------- */
.page-about .about-navbar {
  position: sticky;
  top: var(--header-h);
  z-index: 6;
  margin-top: clamp(12px, 2.5vw, 32px);
  padding: 10px 0;
  background: rgba(10, 15, 13, .92);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.page-about .about-nav {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-about .about-nav .anchor-nav__link {
  flex: 0 0 auto;
  white-space: nowrap;
}

/* ---------- 通用小标题 ---------- */
.page-about .about-h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--white);
}

/* ---------- 01 品牌定位 ---------- */
.page-about .about-intro {
  display: grid;
  gap: clamp(16px, 2.5vw, 32px);
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-about .about-intro__lead {
  font-size: clamp(17px, 2vw, 20px);
  line-height: 1.75;
  color: var(--white);
}

.page-about .about-intro p {
  margin: 0;
  color: var(--text);
  line-height: 1.8;
}

@media (min-width: 860px) {
  .page-about .about-intro {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }
}

.page-about .about-scope {
  gap: clamp(16px, 2.5vw, 28px);
}

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

.page-about .about-list li {
  position: relative;
  padding: 14px 16px 14px 34px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: linear-gradient(180deg, rgba(18, 59, 36, .55) 0%, rgba(10, 15, 13, .45) 100%);
  font-size: 15px;
  line-height: 1.68;
  color: var(--text);
}

.page-about .about-list li::before {
  content: "";
  position: absolute;
  left: 15px;
  top: 21px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 3px var(--lime-a16);
}

/* ---------- 02 覆盖规模 ---------- */
.page-about .about-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(158px, 1fr));
  gap: clamp(12px, 2vw, 20px);
}

.page-about .about-stat {
  position: relative;
  padding: 24px 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(168deg, var(--pitch-2) 0%, rgba(10, 15, 13, .9) 100%);
  overflow: hidden;
  transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
}

.page-about .about-stat::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--lime), rgba(200, 255, 61, 0) 72%);
}

.page-about .about-stat--orange::after {
  background: linear-gradient(90deg, var(--orange), rgba(255, 122, 26, 0) 72%);
}

.page-about .about-stat--violet::after {
  background: linear-gradient(90deg, var(--violet), rgba(123, 77, 255, 0) 72%);
}

.page-about .about-stat__num {
  display: block;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(34px, 5vw, 46px);
  line-height: 1;
  letter-spacing: -.02em;
  color: var(--lime);
}

.page-about .about-stat__num--orange {
  color: var(--orange);
}

.page-about .about-stat__num--violet {
  color: #A98BFF;
}

.page-about .about-stat__label {
  display: block;
  margin-top: 12px;
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-stat__desc {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

@media (hover: hover) {
  .page-about .about-stat:hover {
    transform: translateY(-4px);
    border-color: var(--lime-a38);
    box-shadow: 0 20px 44px -26px rgba(200, 255, 61, .55);
  }
}

/* ---------- 03 更新流程 ---------- */
.page-about .about-flow {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

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

.page-about .about-step {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 14px;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.page-about .about-step:last-child {
  border-bottom: 1px solid var(--line);
}

.page-about .about-step__idx {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--lime);
}

.page-about .about-step__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text);
}

.page-about .about-flow__figure {
  margin: 0;
}

.page-about .about-flow__figure .figure__frame {
  aspect-ratio: 4 / 3;
}

@media (min-width: 940px) {
  .page-about .about-flow {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-about .about-flow__figure {
    margin-top: 52px;
  }
}

/* ---------- 04 内容团队 ---------- */
.page-about .about-teamlead {
  margin: 0 0 clamp(20px, 3vw, 32px);
  max-width: 70ch;
  font-size: clamp(16px, 1.8vw, 18px);
  line-height: 1.8;
  color: var(--text);
}

.page-about .about-teams {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(228px, 1fr));
  gap: clamp(14px, 2vw, 22px);
}

.page-about .about-team {
  --accent: var(--lime);
  padding: 22px 20px;
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: linear-gradient(100deg, rgba(18, 59, 36, .62) 0%, rgba(10, 15, 13, .42) 100%);
  transition: background var(--ease), transform var(--ease);
}

.page-about .about-team--orange {
  --accent: var(--orange);
}

.page-about .about-team--violet {
  --accent: var(--violet);
}

.page-about .about-team__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--accent);
}

.page-about .about-team__name {
  margin: 10px 0 10px;
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-team p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--text);
}

@media (hover: hover) {
  .page-about .about-team:hover {
    transform: translateY(-3px);
    background: linear-gradient(100deg, rgba(18, 59, 36, .85) 0%, rgba(10, 15, 13, .5) 100%);
  }
}

/* ---------- 05 运营历程 ---------- */
.page-about .about-journey {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

.page-about .about-timeline {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0 0 0 26px;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 12px;
  width: 1px;
  background: linear-gradient(180deg, var(--lime) 0%, var(--line) 62%, rgba(31, 60, 42, 0) 100%);
}

.page-about .about-tl {
  position: relative;
  padding-bottom: 26px;
}

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

.page-about .about-tl::before {
  content: "";
  position: absolute;
  left: -26px;
  top: 6px;
  width: 11px;
  height: 11px;
  border-radius: 50%;
  border: 2px solid var(--lime);
  background: var(--ink);
  box-shadow: 0 0 0 4px rgba(200, 255, 61, .1);
}

.page-about .about-tl__when {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--lime);
}

.page-about .about-tl__title {
  margin: 8px 0 6px;
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-tl p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--text);
}

.page-about .about-journey__side {
  display: grid;
  gap: clamp(16px, 2.5vw, 24px);
}

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

.page-about .about-journey__side .figure__frame {
  aspect-ratio: 3 / 2;
}

.page-about .about-legal {
  padding: 22px 22px 20px;
  border: 1px solid var(--lime-a16);
  border-radius: var(--r-md);
  background: linear-gradient(160deg, rgba(200, 255, 61, .07) 0%, rgba(10, 15, 13, .55) 100%);
}

.page-about .about-legal__key {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--lime);
}

.page-about .about-legal__text {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
}

@media (min-width: 940px) {
  .page-about .about-journey {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: start;
  }
}

/* ---------- 下一步 ---------- */
.page-about .about-next__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(224px, 1fr));
  gap: clamp(12px, 2vw, 18px);
}

.page-about .about-nextcard {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: rgba(18, 59, 36, .36);
  text-decoration: none;
  transition: transform var(--ease), border-color var(--ease), background var(--ease);
}

.page-about .about-nextcard__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--lime);
}

.page-about .about-nextcard__t {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.7;
  color: var(--text);
}

@media (hover: hover) {
  .page-about .about-nextcard:hover {
    transform: translateY(-4px);
    border-color: var(--lime-a38);
    background: rgba(18, 59, 36, .62);
  }
}

/* ---------- 窄屏保护 ---------- */
@media (max-width: 520px) {
  .page-about .about-step {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 10px;
  }

  .page-about .about-stat {
    padding: 20px 16px 18px;
  }

  .page-about .about-journey__side,
  .page-about .about-journey {
    min-width: 0;
  }
}