.page-about {
  display: block;
  background:
    radial-gradient(110% 70% at 92% -6%, rgba(25, 195, 208, 0.16), transparent 62%),
    linear-gradient(180deg, var(--ink) 0%, #04121b 68%, var(--abyss) 100%);
  color: var(--mist);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-about img {
  max-width: 100%;
}

.page-about h1,
.page-about h2,
.page-about h3 {
  font-family: var(--font-head);
  font-weight: 800;
  letter-spacing: 0.04em;
}

.page-about h1 {
  font-size: clamp(1.95rem, 6.2vw, 3.45rem);
  line-height: 1.16;
  margin: 0.7rem 0 0;
  color: var(--mist);
}

.page-about h2 {
  font-size: clamp(1.32rem, 3.4vw, 1.95rem);
  line-height: 1.32;
  margin: 0.5rem 0 0;
  color: var(--mist);
}

.page-about h3 {
  font-size: 1.02rem;
  line-height: 1.4;
  margin: 0;
}

/* ---------- 首屏 ---------- */
.about-hero {
  position: relative;
  padding-block: clamp(1.6rem, 4vw, 2.6rem) clamp(2.2rem, 5.5vw, 4rem);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}

.about-hero::before {
  content: "";
  position: absolute;
  top: -38%;
  right: -14%;
  width: min(640px, 78vw);
  height: min(640px, 78vw);
  background: radial-gradient(circle, rgba(25, 195, 208, 0.20), transparent 68%);
  pointer-events: none;
}

.about-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--aqua), transparent 62%);
}

.about-hero__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 2.8rem);
  margin-top: clamp(1rem, 3vw, 1.8rem);
}

.about-hero__lede {
  margin: 1rem 0 0;
  max-width: 36em;
  font-size: clamp(0.95rem, 1.7vw, 1.08rem);
  line-height: 1.78;
  color: var(--slate);
}

.about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.about-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(8, 58, 63, 0.42);
  box-shadow: 0 30px 70px -42px rgba(2, 11, 16, 0.95);
}

.about-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.about-hero__stats {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem 1.2rem;
  margin: clamp(1.6rem, 4vw, 2.6rem) 0 0;
  padding: 1.1rem 0 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.about-hero__stat {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  cursor: help;
}

.about-hero__stat-num {
  font-family: var(--font-mono);
  font-size: clamp(1.45rem, 3.6vw, 2.05rem);
  line-height: 1.1;
  letter-spacing: 0.01em;
  color: var(--aqua-soft);
  transition: color 0.2s var(--ease);
}

.about-hero__stat:hover .about-hero__stat-num {
  color: var(--coral);
}

.about-hero__stat-label {
  font-size: 0.76rem;
  letter-spacing: 0.14em;
  color: var(--slate);
}

@media (min-width: 900px) {
  .about-hero__grid {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.94fr);
    align-items: end;
  }

  .about-hero__media {
    transform: translateY(-0.4rem);
  }

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

/* ---------- 正文两栏 ---------- */
.about-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 2.6rem);
  padding-block: clamp(2rem, 5vw, 3.4rem) clamp(3rem, 7vw, 5rem);
}

.about-index {
  border-left: 1px solid var(--line);
  padding-left: 1rem;
}

.about-index__title {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  color: var(--slate);
}

.about-index__list {
  counter-reset: idx;
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 0.8rem 0 0;
  padding: 0;
}

.about-index__list li {
  counter-increment: idx;
}

.about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.4rem;
  padding: 0.35rem 0.72rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.79rem;
  color: var(--slate);
  text-decoration: none;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.about-index__link::before {
  content: counter(idx, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--aqua);
}

.about-index__link:hover,
.about-index__link:focus-visible {
  color: var(--mist);
  border-color: var(--line-strong);
  background: rgba(25, 195, 208, 0.12);
}

.about-flow {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(2.2rem, 5vw, 3.6rem);
}

@media (min-width: 980px) {
  .about-body {
    grid-template-columns: 200px minmax(0, 1fr);
    align-items: start;
  }

  .about-index {
    position: sticky;
    top: 1.6rem;
  }

  .about-index__list {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 0.1rem;
    margin-top: 1rem;
  }

  .about-index__link {
    border: 0;
    border-radius: 0;
    padding: 0.45rem 0;
    font-size: 0.85rem;
  }
}

/* ---------- 区块通用 ---------- */
.about-section {
  scroll-margin-top: 1.5rem;
}

.about-section__head {
  margin: 0;
}

.about-prose {
  margin: 1rem 0 0;
  font-size: 0.97rem;
  line-height: 1.82;
  color: var(--slate);
}

.about-prose a {
  color: var(--aqua-soft);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.about-prose a:hover {
  color: var(--coral);
}

/* ---------- 两个入口 ---------- */
.about-entries {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
  margin-top: 1.4rem;
}

.about-entry {
  padding: 1.1rem 1.2rem 1.25rem;
  border-left: 2px solid rgba(25, 195, 208, 0.55);
  transition: border-color 0.22s var(--ease), transform 0.22s var(--ease);
}

.about-entry:hover {
  border-left-color: var(--coral);
  transform: translateY(-2px);
}

.about-entry__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--coral);
}

.about-entry__title {
  margin-top: 0.45rem;
  color: var(--mist);
}

.about-entry__text {
  margin: 0.5rem 0 0;
  font-size: 0.88rem;
  line-height: 1.72;
  color: var(--slate);
}

@media (min-width: 720px) {
  .about-entries {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 浅色内容体系 ---------- */
.about-band {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  padding: clamp(1.3rem, 4vw, 2.3rem);
  background: linear-gradient(165deg, rgba(8, 58, 63, 0.66), rgba(6, 26, 38, 0.92));
  scroll-margin-top: 1.5rem;
}

.about-band--light {
  background: var(--mist);
  border-color: rgba(6, 26, 38, 0.10);
  box-shadow: 0 26px 64px -44px rgba(2, 11, 16, 0.9);
}

.about-band--light .eyebrow {
  color: var(--teal);
}

.about-band--light h2 {
  color: var(--ink);
}

.about-band--light .about-prose {
  color: #3a5158;
}

.about-band__figure {
  margin: 1.3rem 0 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid rgba(6, 26, 38, 0.10);
  aspect-ratio: 3 / 2;
  background: rgba(8, 58, 63, 0.06);
}

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

.about-cats {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.75rem;
  margin: 1.3rem 0 0;
  padding: 0;
}

.about-cat {
  position: relative;
  padding: 1.05rem 1.05rem 1.15rem;
  border: 1px solid rgba(6, 26, 38, 0.09);
  border-radius: var(--radius-sm);
  background: #ffffff;
  transition: transform 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.about-cat:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 32px -22px rgba(6, 26, 38, 0.55);
}

.about-cat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--teal);
}

.about-cat__title {
  margin-top: 0.4rem;
  font-size: 0.98rem;
  color: var(--ink);
  letter-spacing: 0.03em;
}

.about-cat__text {
  margin: 0.45rem 0 0;
  font-size: 0.84rem;
  line-height: 1.68;
  color: #4a6068;
}

.about-band__more {
  margin: 1.4rem 0 0;
}

@media (min-width: 620px) {
  .about-cats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1000px) {
  .about-cats {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

/* ---------- 阶段带 ---------- */
.about-phases {
  list-style: none;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.1rem;
  margin: 1.6rem 0 0;
  padding: 0;
}

.about-phase {
  position: relative;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line-strong);
}

.about-phase::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--aqua);
  box-shadow: 0 0 0 4px rgba(25, 195, 208, 0.16);
}

.about-phase__num {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.2em;
  color: var(--coral);
}

.about-phase h3 {
  margin-top: 0.5rem;
  color: var(--mist);
}

.about-phase p {
  margin: 0.45rem 0 0;
  font-size: 0.86rem;
  line-height: 1.72;
  color: var(--slate);
}

.about-section__figure {
  margin: 1.6rem 0 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: rgba(8, 58, 63, 0.4);
}

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

@media (min-width: 760px) {
  .about-phases {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 1.2rem;
  }
}

/* ---------- 团队 ---------- */
.about-team {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.2rem;
  margin-top: 1.4rem;
}

.about-team__lead {
  padding: 1.3rem 1.2rem 1.4rem;
  background: linear-gradient(165deg, rgba(8, 58, 63, 0.92), rgba(6, 26, 38, 0.94));
}

.about-team__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(2.6rem, 8vw, 3.5rem);
  line-height: 1;
  letter-spacing: 0.01em;
  color: var(--aqua-soft);
}

.about-team__unit {
  margin: 0.35rem 0 0;
  font-family: var(--font-head);
  font-size: 0.86rem;
  letter-spacing: 0.2em;
  color: var(--mist);
}

.about-team__note {
  margin: 0.75rem 0 0;
  font-size: 0.82rem;
  line-height: 1.66;
  color: var(--slate);
}

.about-team__body .about-prose {
  margin-top: 0;
}

.about-roles {
  list-style: none;
  display: grid;
  gap: 0.15rem;
  margin: 1.1rem 0 0;
  padding: 0;
}

.about-roles li {
  display: grid;
  grid-template-columns: 5.2em minmax(0, 1fr);
  gap: 0.7rem;
  padding: 0.6rem 0;
  border-bottom: 1px solid var(--line-faint);
  font-size: 0.87rem;
}

.about-roles__key {
  font-family: var(--font-head);
  letter-spacing: 0.04em;
  color: var(--aqua-soft);
}

.about-roles__val {
  line-height: 1.62;
  color: var(--slate);
}

.about-check {
  margin-top: 1.2rem;
  padding-left: 0.9rem;
  border-left: 2px solid var(--coral);
}

.about-check__title {
  margin: 0;
  font-family: var(--font-head);
  font-size: 0.94rem;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.about-check__text {
  margin: 0.4rem 0 0;
  font-size: 0.86rem;
  line-height: 1.72;
  color: var(--slate);
}

@media (min-width: 820px) {
  .about-team {
    grid-template-columns: 236px minmax(0, 1fr);
    align-items: start;
    gap: 1.7rem;
  }
}

/* ---------- 联系 ---------- */
.about-channels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0.9rem;
  margin-top: 1.4rem;
}

.about-channel {
  padding: 1.05rem 1.15rem 1.2rem;
  border-top: 1px solid var(--line-faint);
}

.about-channel__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--slate);
}

.about-channel__value {
  margin: 0.55rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.92rem;
  line-height: 1.55;
  color: var(--mist);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.about-channel__value--text {
  font-family: var(--font-body);
  font-size: 0.92rem;
  line-height: 1.66;
}

.about-channel .copy-btn {
  margin-top: 0.8rem;
}

.about-service__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

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

@media (prefers-reduced-motion: reduce) {
  .page-about * {
    transition-duration: 0.01ms !important;
  }

  .about-entry:hover,
  .about-cat:hover {
    transform: none;
  }

  .about-hero__media {
    transform: none;
  }
}