.page-about {
  --about-index-w: 196px;
  --about-glow-gold: 0 0 24px rgba(246, 196, 83, 0.35);
  display: block;
}

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

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  display: grid;
  gap: clamp(24px, 4vw, 52px);
  align-items: end;
  padding: clamp(24px, 4vw, 52px) 0 clamp(36px, 6vw, 72px);
  border-bottom: 1px solid var(--sg-line);
  position: relative;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto auto;
  width: min(520px, 70vw);
  height: min(520px, 70vw);
  background: radial-gradient(circle at 60% 40%, rgba(47, 227, 255, 0.16), transparent 62%),
    radial-gradient(circle at 30% 78%, rgba(246, 196, 83, 0.16), transparent 58%);
  filter: blur(6px);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero__text,
.page-about .about-hero__figure {
  position: relative;
  z-index: 1;
}

.page-about .about-kicker {
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--sg-mist);
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.page-about .about-kicker .sg-mono {
  color: var(--sg-cyan);
  border: 1px solid var(--sg-line-cyan);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 11px;
  letter-spacing: 0.18em;
  background: rgba(47, 227, 255, 0.07);
}

.page-about .about-hero__title {
  margin: 0 0 22px;
  font-family: var(--sg-font-display);
  font-weight: 900;
  font-size: clamp(38px, 7.4vw, 82px);
  line-height: 1.06;
  letter-spacing: -0.01em;
  color: var(--sg-cream);
  text-shadow: 0 0 1px rgba(246, 196, 83, 0.6);
}

.page-about .about-hero__title em {
  font-style: normal;
  color: var(--sg-gold);
  text-shadow: var(--about-glow-gold);
}

.page-about .about-hero__lead {
  margin: 0 0 22px;
  max-width: 46em;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.85;
  color: var(--sg-mist);
}

.page-about .about-hero__tags {
  list-style: none;
  margin: 0 0 26px;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-about .about-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-about .about-hero__figure {
  margin: 0;
  border: 2px solid var(--sg-amber);
  box-shadow: var(--sg-shadow-hard);
  transform: translateY(0);
}

/* ---------- 主体两栏 ---------- */
.page-about .about-body {
  display: grid;
  gap: clamp(24px, 4vw, 56px);
  padding: clamp(36px, 6vw, 84px) 0 clamp(48px, 7vw, 96px);
}

.page-about .about-index {
  align-self: start;
  border-left: 2px solid var(--sg-line);
  padding-left: 16px;
}

.page-about .about-index__title {
  margin: 0 0 14px;
  font-family: var(--sg-font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--sg-amber);
  text-transform: uppercase;
}

.page-about .about-index__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 10px;
  overflow-x: auto;
  scrollbar-width: thin;
  padding-bottom: 6px;
}

.page-about .about-index__link {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  white-space: nowrap;
  padding: 8px 12px;
  border: 1px solid var(--sg-line-soft);
  border-radius: var(--sg-radius-sm);
  background: var(--sg-graphite);
  color: var(--sg-cream);
  font-size: 13px;
  text-decoration: none;
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}

.page-about .about-index__link .sg-mono {
  font-size: 11px;
  color: var(--sg-cyan);
  letter-spacing: 0.08em;
}

.page-about .about-index__link:hover,
.page-about .about-index__link:focus-visible {
  border-color: var(--sg-cyan);
  color: var(--sg-cyan);
  background: rgba(47, 227, 255, 0.08);
  outline: none;
}

/* ---------- 章节 ---------- */
.page-about .about-stream {
  min-width: 0;
}

.page-about .about-chapter {
  padding: clamp(28px, 4vw, 54px) 0;
  border-top: 1px solid var(--sg-line-soft);
  scroll-margin-top: 96px;
}

.page-about .about-chapter:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-about .about-chapter__head {
  display: flex;
  align-items: flex-start;
  gap: clamp(12px, 2vw, 24px);
  margin-bottom: 22px;
}

.page-about .about-chapter__num {
  flex: 0 0 auto;
  font-family: var(--sg-font-mono);
  font-weight: 700;
  font-size: clamp(34px, 6vw, 62px);
  line-height: 0.92;
  color: transparent;
  -webkit-text-stroke: 1px rgba(246, 196, 83, 0.62);
  letter-spacing: -0.02em;
}

.page-about .about-chapter__title {
  margin: 0;
  font-family: var(--sg-font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.3;
  color: var(--sg-cream);
  padding-top: 4px;
}

.page-about .about-chapter__body > p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--sg-mist);
}

.page-about .about-chapter__tail {
  margin: 22px 0 0;
  padding: 16px 20px;
  border-left: 3px solid var(--sg-amber);
  background: linear-gradient(90deg, rgba(183, 122, 38, 0.14), transparent 78%);
  border-radius: 0 var(--sg-radius-sm) var(--sg-radius-sm) 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--sg-cream);
}

.page-about .about-note {
  margin: 26px 0 0;
  padding: 22px clamp(18px, 3vw, 30px);
  border: 2px solid var(--sg-amber);
  border-radius: var(--sg-radius);
  background:
    repeating-linear-gradient(135deg, rgba(246, 196, 83, 0.05) 0 10px, transparent 10px 20px),
    var(--sg-graphite);
  box-shadow: var(--sg-shadow-hard);
  max-width: 42em;
}

.page-about .about-note__label {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--sg-gold);
}

.page-about .about-note__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--sg-cream);
}

/* ---------- 四类记录 ---------- */
.page-about .about-logtypes {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-about .about-logtypes__item {
  padding: 20px 20px 20px 22px;
  border: 1px solid var(--sg-line-soft);
  border-left: 4px solid var(--sg-mist);
  border-radius: var(--sg-radius-sm);
  background: var(--sg-graphite);
}

.page-about .about-logtypes__item--gold { border-left-color: var(--sg-gold); }
.page-about .about-logtypes__item--cyan { border-left-color: var(--sg-cyan); }
.page-about .about-logtypes__item--rose { border-left-color: var(--sg-rose); }
.page-about .about-logtypes__item--cream { border-left-color: var(--sg-cream); }

.page-about .about-logtypes__title {
  margin: 0 0 8px;
  font-family: var(--sg-font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--sg-cream);
  letter-spacing: 0.02em;
}

.page-about .about-logtypes__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sg-mist);
}

/* ---------- 数据带 ---------- */
.page-about .about-band {
  display: grid;
  gap: 1px;
  margin: clamp(20px, 3vw, 32px) 0;
  padding: 1px;
  background: var(--sg-line);
  border: 2px solid var(--sg-amber);
  border-radius: var(--sg-radius);
  overflow: hidden;
  box-shadow: var(--sg-shadow-hard);
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.page-about .about-band__item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px clamp(14px, 2.4vw, 26px);
  background:
    radial-gradient(circle at 100% 0, rgba(47, 227, 255, 0.1), transparent 62%),
    var(--sg-graphite);
  min-width: 0;
}

.page-about .about-band__num {
  font-size: clamp(28px, 5vw, 44px);
  font-weight: 700;
  line-height: 1;
  color: var(--sg-gold);
  text-shadow: 0 0 16px rgba(246, 196, 83, 0.28);
}

.page-about .about-band__label {
  font-size: 13px;
  line-height: 1.6;
  color: var(--sg-mist);
}

/* ---------- 团队 ---------- */
.page-about .about-team__figure {
  margin: 0 0 24px;
  aspect-ratio: 3 / 2;
  border: 2px solid var(--sg-line-cyan);
  box-shadow: var(--sg-shadow-hard);
}

.page-about .about-team__grid {
  gap: 14px;
}

.page-about .about-team__card {
  padding: 20px;
  border: 1px solid var(--sg-line-soft);
  border-radius: var(--sg-radius-sm);
  background: linear-gradient(160deg, rgba(20, 49, 58, 0.6), var(--sg-graphite) 62%);
  min-width: 0;
}

.page-about .about-team__card:nth-child(2n) {
  transform: translateY(6px);
}

.page-about .about-team__name {
  margin: 0 0 10px;
  font-family: var(--sg-font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--sg-gold);
}

.page-about .about-team__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.82;
  color: var(--sg-mist);
}

/* ---------- 服务覆盖 ---------- */
.page-about .about-reach__grid {
  gap: 16px;
  margin-top: 8px;
}

.page-about .about-reach__panel {
  padding: clamp(20px, 3vw, 28px);
  border: 2px solid var(--sg-amber);
  border-radius: var(--sg-radius);
  background: var(--sg-graphite);
  min-width: 0;
}

.page-about .about-reach__panel--cyan {
  border-color: var(--sg-line-cyan);
  background: linear-gradient(155deg, rgba(47, 227, 255, 0.12), var(--sg-graphite) 58%);
}

.page-about .about-reach__title {
  margin: 0 0 14px;
  font-family: var(--sg-font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--sg-cream);
}

.page-about .about-reach__list {
  list-style: none;
  margin: 0 0 14px;
  padding: 0;
  display: grid;
  gap: 10px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--sg-cream);
  overflow-wrap: anywhere;
}

.page-about .about-reach__list li {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: baseline;
}

.page-about .about-reach__list .sg-mono {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--sg-cyan);
  min-width: 40px;
}

.page-about .about-reach__hint,
.page-about .about-reach__panel--cyan p {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--sg-mist);
}

/* ---------- 生态 ---------- */
.page-about .about-eco__figure {
  margin: 0 0 24px;
  border: 2px solid var(--sg-line-rose);
  box-shadow: var(--sg-shadow-hard);
}

.page-about .about-eco__grid {
  gap: 14px;
}

.page-about .about-eco__node {
  padding: 20px;
  border: 1px solid var(--sg-line-soft);
  border-top: 3px solid var(--sg-gold);
  border-radius: var(--sg-radius-sm);
  background: var(--sg-graphite);
  min-width: 0;
}

.page-about .about-eco__node--cyan { border-top-color: var(--sg-cyan); }
.page-about .about-eco__node--rose { border-top-color: var(--sg-rose); }

.page-about .about-eco__kind {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--sg-amber);
}

.page-about .about-eco__name {
  margin: 0 0 8px;
  font-family: var(--sg-font-display);
  font-size: 17px;
  font-weight: 700;
  color: var(--sg-cream);
}

.page-about .about-eco__node p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--sg-mist);
}

/* ---------- 服务承诺 ---------- */
.page-about .about-promise {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-about .about-promise__item {
  padding: 20px 0;
  border-bottom: 1px solid var(--sg-line-soft);
}

.page-about .about-promise__item:first-child {
  padding-top: 0;
}

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

.page-about .about-promise__title {
  margin: 0 0 8px;
  font-family: var(--sg-font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--sg-cream);
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-about .about-promise__title::before {
  content: "◆";
  font-size: 11px;
  color: var(--sg-gold);
  transform: translateY(-2px);
}

.page-about .about-promise__item p {
  margin: 0;
  padding-left: 21px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--sg-mist);
}

/* ---------- 结尾 ---------- */
.page-about .about-cta {
  margin-top: clamp(28px, 4vw, 48px);
  padding: clamp(26px, 4vw, 44px);
  border: 2px solid var(--sg-amber);
  border-radius: var(--sg-radius);
  background:
    radial-gradient(circle at 100% 0, rgba(255, 79, 144, 0.16), transparent 56%),
    radial-gradient(circle at 0 100%, rgba(47, 227, 255, 0.14), transparent 58%),
    var(--sg-graphite);
  box-shadow: var(--sg-shadow-lift);
}

.page-about .about-cta__title {
  margin: 0 0 14px;
  font-family: var(--sg-font-display);
  font-weight: 800;
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1.35;
  color: var(--sg-cream);
}

.page-about .about-cta__text {
  margin: 0 0 22px;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.88;
  color: var(--sg-mist);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-about .about-logtypes {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-about .about-hero {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.72fr);
    gap: clamp(32px, 5vw, 68px);
  }

  .page-about .about-hero__figure {
    margin-bottom: 8px;
  }
}

@media (min-width: 960px) {
  .page-about .about-body {
    grid-template-columns: var(--about-index-w) minmax(0, 1fr);
    gap: clamp(36px, 5vw, 76px);
  }

  .page-about .about-index {
    position: sticky;
    top: 96px;
    padding-left: 18px;
  }

  .page-about .about-index__list {
    flex-direction: column;
    overflow: visible;
    gap: 8px;
  }

  .page-about .about-index__link {
    display: flex;
    width: 100%;
    padding: 9px 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-team__card:nth-child(2n) {
    transform: none;
  }

  .page-about .about-index__link {
    transition: none;
  }
}