.page-about {
  --about-sticky-top: 112px;
  --about-orange-ghost: rgba(255, 107, 26, 0.14);
  --about-teal-ghost: rgba(15, 191, 155, 0.16);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -180px;
  right: -160px;
  width: min(74vw, 620px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, rgba(15, 191, 155, 0.26), rgba(15, 191, 155, 0) 62%);
  pointer-events: none;
  z-index: 0;
}

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

.page-about .about-hero__grid {
  display: grid;
  gap: clamp(26px, 4.5vw, 44px);
  margin-top: clamp(22px, 3.5vw, 34px);
}

.page-about .about-hero__copy {
  animation: about-rise 620ms var(--ease) both;
}

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

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(22px, 3vw, 30px);
}

.page-about .about-hero__visual {
  margin: 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--hairline-dark);
  background: rgba(255, 255, 255, 0.04);
  animation: about-rise 620ms 120ms var(--ease) both;
}

.page-about .about-hero__visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-about .about-stats {
  list-style: none;
  margin: clamp(30px, 4.5vw, 48px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  animation: about-rise 620ms 220ms var(--ease) both;
}

.page-about .about-stats__item {
  padding: 16px 16px 14px;
  border-radius: var(--r-md);
  border: 1px solid var(--hairline-dark);
  background: rgba(255, 255, 255, 0.05);
}

.page-about .about-stats__num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.35rem, 3.4vw, 1.85rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.15;
  color: var(--white);
}

.page-about .about-stats__label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  color: var(--on-dark-soft);
}

@keyframes about-rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

/* ---------- 时间线 ---------- */
.page-about .about-history__grid {
  display: grid;
  gap: clamp(28px, 4.5vw, 48px);
}

.page-about .timeline {
  list-style: none;
  margin: clamp(26px, 3.5vw, 36px) 0 0;
  padding: 0;
  position: relative;
}

.page-about .timeline::before {
  content: "";
  position: absolute;
  left: 7px;
  top: 10px;
  bottom: 10px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--orange), rgba(255, 107, 26, 0.12));
}

.page-about .timeline__item {
  position: relative;
  padding: 0 0 30px 34px;
}

.page-about .timeline__item:nth-child(1) {
  padding-bottom: 46px;
}

.page-about .timeline__item:nth-child(3) {
  padding-bottom: 52px;
}

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

.page-about .timeline__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 5px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--orange);
  box-shadow: 0 0 0 5px var(--about-orange-ghost);
}

.page-about .timeline__year {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-about .timeline__title {
  margin: 0 0 8px;
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.page-about .timeline__text {
  margin: 0;
  max-width: 56ch;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--slate);
}

.page-about .about-aside {
  border: 1px solid var(--hairline-strong);
  border-radius: var(--r-lg);
  padding: 24px;
  background: var(--white);
}

.page-about .about-aside__label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--slate);
}

.page-about .about-aside__text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-aside__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 18px 0 0;
  border-top: 1px solid var(--hairline);
  display: grid;
  gap: 10px;
}

.page-about .about-aside__list a {
  color: var(--blue-deep);
  font-size: 0.92rem;
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 107, 26, 0.5);
  padding-bottom: 1px;
  transition: color 150ms var(--ease);
}

.page-about .about-aside__list a:hover {
  color: var(--orange);
}

/* ---------- 服务网络 ---------- */
.page-about .about-network__grid {
  display: grid;
  gap: clamp(28px, 4.5vw, 44px);
}

.page-about .about-network__cats {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.page-about .about-network__cats li {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 14px;
  border-radius: var(--r-pill);
  background: var(--white);
  border: 1px solid var(--hairline);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--ink);
}

.page-about .about-cat__dot {
  flex: none;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--teal);
}

.page-about .city-matrix {
  position: relative;
  height: clamp(170px, 30vw, 250px);
  border-radius: var(--r-lg);
  overflow: hidden;
  background-color: var(--blue-deep);
  background-image: radial-gradient(circle, rgba(15, 191, 155, 0.85) 1.8px, transparent 2px);
  background-size: 22px 22px;
}

.page-about .city-matrix::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(118deg, rgba(255, 107, 26, 0.34), rgba(11, 31, 59, 0) 58%),
    radial-gradient(circle at 82% 18%, rgba(255, 255, 255, 0.16), transparent 56%);
}

.page-about .about-network__caption {
  margin: 14px 0 0;
  font-size: 0.93rem;
  line-height: 1.75;
  color: var(--ink);
}

.page-about .about-network__figure {
  margin: clamp(26px, 4vw, 40px) 0 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--hairline);
}

.page-about .about-network__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

/* ---------- 培训体系 ---------- */
.page-about .about-training__grid {
  display: grid;
  gap: clamp(28px, 4.5vw, 44px);
  margin-top: clamp(26px, 4vw, 40px);
}

.page-about .about-training__rings {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(20px, 4vw, 36px);
  align-items: flex-start;
}

.page-about .ring-block {
  text-align: center;
}

.page-about .ring {
  position: relative;
  width: 138px;
  aspect-ratio: 1;
  border-radius: 50%;
  animation: about-ring-in 900ms var(--ease) both;
}

.page-about .ring--24 {
  background: repeating-conic-gradient(from -2deg, var(--orange) 0deg 12deg, var(--about-orange-ghost) 12deg 15deg);
}

.page-about .ring--8 {
  background: repeating-conic-gradient(from -2deg, var(--teal) 0deg 39deg, var(--about-teal-ghost) 39deg 45deg);
}

.page-about .ring::after {
  content: "";
  position: absolute;
  inset: 17%;
  border-radius: 50%;
  background: var(--paper);
}

.page-about .ring__inner {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--blue-deep);
  z-index: 1;
}

.page-about .ring-block__label {
  margin: 12px auto 0;
  max-width: 140px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--slate);
}

.page-about .about-training__figure {
  margin: clamp(24px, 3.5vw, 32px) 0 0;
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--hairline);
  background: var(--mint);
}

.page-about .about-training__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.page-about .about-training__steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-training__steps li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  padding: 18px;
  border-radius: var(--r-md);
  background: var(--white);
  border: 1px solid var(--hairline);
  transition: border-color 150ms var(--ease), transform 150ms var(--ease);
}

.page-about .about-training__steps li:hover {
  border-color: var(--orange);
  transform: translateY(-3px);
}

.page-about .about-training__step-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-about .about-training__step-title {
  margin: 0 0 6px;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--ink);
}

.page-about .about-training__step-text {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.72;
  color: var(--slate);
}

@keyframes about-ring-in {
  from {
    opacity: 0;
    transform: scale(0.88);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* ---------- 老用户 ---------- */
.page-about .about-loyal__grid {
  display: grid;
  gap: clamp(28px, 4.5vw, 48px);
}

.page-about .about-loyal__list {
  list-style: none;
  margin: clamp(24px, 3vw, 32px) 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-about .about-loyal__list li {
  padding: 20px;
  border-radius: var(--r-md);
  border: 1px solid var(--hairline-dark);
  background: rgba(255, 255, 255, 0.05);
}

.page-about .about-loyal__list strong {
  display: block;
  margin-bottom: 8px;
  font-size: 1.03rem;
  font-weight: 700;
  color: var(--white);
}

.page-about .about-loyal__list p {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.75;
  color: var(--on-dark);
}

.page-about .about-loyal__stats {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-about .about-loyal__stat {
  padding: 22px 20px;
  border-radius: var(--r-md);
  background: rgba(15, 191, 155, 0.1);
  border: 1px solid rgba(15, 191, 155, 0.32);
}

.page-about .about-loyal__stat-num {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(1.45rem, 3.2vw, 1.9rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--mint);
}

.page-about .about-loyal__stat p {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--on-dark);
}

/* ---------- 区域服务商 ---------- */
.page-about .about-partners__grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-about .about-partners__intro .btn {
  margin-top: clamp(20px, 3vw, 26px);
}

.page-about .about-partners__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-partners__list li {
  position: relative;
  padding: 16px 18px 16px 44px;
  border-radius: var(--r-md);
  background: var(--white);
  border: 1px solid var(--hairline);
  font-size: 0.94rem;
  line-height: 1.65;
  color: var(--ink);
}

.page-about .about-partners__list li::before {
  content: "";
  position: absolute;
  left: 18px;
  top: 24px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--teal);
}

/* ---------- 下一步 ---------- */
.page-about .about-next__grid {
  list-style: none;
  margin: clamp(24px, 3.4vw, 36px) 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-about .about-next__grid a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 22px;
  border-radius: var(--r-md);
  background: var(--white);
  border: 1px solid var(--hairline);
  color: var(--blue-deep);
  font-weight: 700;
  text-decoration: none;
  transition: border-color 150ms var(--ease), transform 150ms var(--ease);
}

.page-about .about-next__grid a:hover {
  border-color: var(--orange);
  transform: translateY(-3px);
}

.page-about .about-next__arrow {
  font-family: var(--font-mono);
  color: var(--orange);
}

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

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

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

@media (min-width: 880px) {
  .page-about .about-hero__grid {
    grid-template-columns: minmax(0, 62fr) minmax(0, 38fr);
    align-items: end;
  }
}

@media (min-width: 940px) {
  .page-about .about-history__grid {
    grid-template-columns: minmax(0, 62fr) minmax(0, 38fr);
    align-items: start;
  }

  .page-about .about-history__aside {
    position: sticky;
    top: var(--about-sticky-top);
  }

  .page-about .about-network__grid {
    grid-template-columns: minmax(0, 56fr) minmax(0, 44fr);
    align-items: start;
  }

  .page-about .about-training__grid {
    grid-template-columns: minmax(0, 44fr) minmax(0, 56fr);
    align-items: start;
  }

  .page-about .about-loyal__grid {
    grid-template-columns: minmax(0, 62fr) minmax(0, 38fr);
    align-items: start;
  }

  .page-about .about-partners__grid {
    grid-template-columns: minmax(0, 54fr) minmax(0, 46fr);
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero__copy,
  .page-about .about-hero__visual,
  .page-about .about-stats,
  .page-about .ring {
    animation: none;
  }

  .page-about .about-training__steps li:hover,
  .page-about .about-next__grid a:hover {
    transform: none;
  }
}