.page-about {
  --about-glow-violet: rgba(123, 92, 255, 0.34);
  --about-glow-cyan: rgba(72, 233, 208, 0.22);
  --about-glow-magenta: rgba(255, 92, 214, 0.16);
  display: block;
}

/* ---------- 面包屑 ---------- */
.page-about .breadcrumbs {
  padding-top: 24px;
  padding-bottom: 4px;
}

.page-about .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-3);
}

.page-about .breadcrumb-list li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
  color: var(--line-2);
}

/* ---------- 首屏 ---------- */
.page-about .about-hero {
  position: relative;
  overflow: hidden;
  padding: 40px 0 64px;
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  top: -34%;
  right: -24%;
  width: 118%;
  height: 172%;
  background:
    radial-gradient(58% 46% at 68% 34%, var(--about-glow-violet), transparent 70%),
    radial-gradient(44% 42% at 26% 74%, var(--about-glow-cyan), transparent 66%),
    radial-gradient(38% 34% at 88% 82%, var(--about-glow-magenta), transparent 68%);
  transform: rotate(-9deg);
  pointer-events: none;
  z-index: 0;
}

.page-about .about-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 40px;
}

.page-about .about-hero-copy h1 {
  margin: 14px 0 0;
  font-size: clamp(30px, 6.6vw, 60px);
  line-height: 1.14;
  letter-spacing: 0.02em;
  max-width: 15ch;
}

.page-about .about-hero-lead {
  margin: 22px 0 0;
  max-width: 52ch;
  font-size: clamp(15px, 1.5vw, 17px);
  line-height: 1.9;
  color: var(--text-2);
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

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

.page-about .about-hero-figure .media-frame {
  box-shadow: 0 30px 70px -40px rgba(123, 92, 255, 0.75);
}

/* ---------- 品牌主张 ---------- */
.page-about .about-stance {
  position: relative;
  padding-top: 72px;
  padding-bottom: 72px;
  border-top: 1px solid var(--line);
}

.page-about .about-stance-grid {
  display: grid;
  gap: 48px;
}

.page-about .about-stance-copy p {
  margin: 18px 0 0;
  max-width: 58ch;
  line-height: 1.9;
}

.page-about .about-stance-copy .section-lead {
  color: var(--text-2);
  font-size: 16px;
}

.page-about .about-stance-copy p:not(.section-lead) {
  color: var(--text-2);
  font-size: 15px;
}

.page-about .about-principles {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-about .about-principle {
  position: relative;
  padding: 22px 22px 22px 26px;
  background: linear-gradient(120deg, rgba(18, 24, 44, 0.82), rgba(18, 24, 44, 0.34));
  border-radius: var(--radius-s);
}

.page-about .about-principle::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--violet), var(--cyan));
}

.page-about .about-principle:nth-child(2)::before {
  background: linear-gradient(180deg, var(--cyan), var(--magenta));
}

.page-about .about-principle:nth-child(3)::before {
  background: linear-gradient(180deg, var(--amber), var(--violet));
}

.page-about .about-principle-num {
  display: block;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--text-3);
}

.page-about .about-principle h3 {
  margin: 8px 0 0;
  font-size: 17px;
  letter-spacing: 0.05em;
}

.page-about .about-principle p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.85;
  color: var(--text-2);
}

/* ---------- 记录节奏 ---------- */
.page-about .about-rhythm {
  padding-top: 68px;
  padding-bottom: 68px;
  background:
    radial-gradient(70% 120% at 12% 0%, rgba(46, 200, 255, 0.12), transparent 62%),
    linear-gradient(180deg, rgba(7, 10, 20, 0.9), rgba(4, 5, 12, 0.2));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-about .about-rhythm-head {
  max-width: 60ch;
}

.page-about .about-rhythm-head .section-title {
  margin-top: 14px;
}

.page-about .about-rhythm-body {
  display: grid;
  gap: 36px;
  margin-top: 42px;
}

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

.page-about .about-rhythm-figure .media-frame {
  box-shadow: 0 26px 60px -44px rgba(72, 233, 208, 0.9);
}

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

.page-about .about-orbit .orbit-item {
  padding: 20px 0;
  border-bottom: 1px dashed var(--line);
}

.page-about .about-orbit .orbit-item:last-child {
  border-bottom: 0;
}

.page-about .about-orbit .chip {
  margin-bottom: 10px;
}

.page-about .about-orbit p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--text-2);
}

.page-about .about-stats {
  margin-top: 48px;
  padding-top: 28px;
  border-top: 1px solid var(--line-2);
}

.page-about .about-stats .stat-value {
  font-size: clamp(20px, 3vw, 28px);
  letter-spacing: 0.04em;
  background: linear-gradient(96deg, var(--cyan), var(--violet-2) 55%, var(--amber));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.page-about .about-stats .stat-label {
  margin-top: 6px;
  font-size: 12.5px;
  color: var(--text-3);
}

/* ---------- 使用场景 ---------- */
.page-about .about-scenes {
  padding-top: 72px;
  padding-bottom: 72px;
}

.page-about .about-scenes-head {
  max-width: 62ch;
}

.page-about .about-scenes-head .section-title {
  margin-top: 14px;
}

.page-about .about-scenes-head .section-lead {
  margin-top: 16px;
  color: var(--text-2);
}

.page-about .about-scene-grid {
  margin-top: 46px;
}

.page-about .about-scene {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 26px 22px 24px;
  background: linear-gradient(170deg, rgba(16, 23, 41, 0.94), rgba(10, 14, 28, 0.72));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  position: relative;
  overflow: hidden;
}

.page-about .about-scene::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0.7;
}

.page-about .about-scene--b::after {
  background: linear-gradient(90deg, transparent, var(--magenta), transparent);
}

.page-about .about-scene--c::after {
  background: linear-gradient(90deg, transparent, var(--amber), transparent);
}

.page-about .about-scene-tag {
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--text-3);
}

.page-about .about-scene h3 {
  margin: 0;
  font-size: clamp(18px, 2.4vw, 21px);
  line-height: 1.4;
  letter-spacing: 0.03em;
}

.page-about .about-scene p {
  margin: 0;
  flex: 1;
  font-size: 14.5px;
  line-height: 1.9;
  color: var(--text-2);
}

.page-about .about-scene .btn-quiet {
  align-self: flex-start;
  margin-top: 6px;
}

/* ---------- 开始区块 ---------- */
.page-about .about-start {
  padding-top: 8px;
  padding-bottom: 88px;
}

.page-about .about-start-panel {
  padding: clamp(28px, 4.4vw, 48px);
  display: grid;
  gap: 26px;
  border-left: 2px solid transparent;
  border-image: linear-gradient(180deg, var(--violet), var(--cyan), var(--amber)) 1;
}

.page-about .about-start-text .section-title {
  margin-top: 14px;
}

.page-about .about-start-text p {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-2);
}

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

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-about .about-rhythm-body {
    grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
    align-items: start;
    gap: 44px;
  }

  .page-about .about-start-panel {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: end;
  }

  .page-about .about-start-actions {
    justify-content: flex-end;
  }
}

@media (min-width: 960px) {
  .page-about .about-hero {
    padding: 64px 0 96px;
  }

  .page-about .about-hero-inner {
    grid-template-columns: minmax(0, 1.06fr) minmax(0, 0.84fr);
    align-items: center;
    gap: 56px;
  }

  .page-about .about-hero-figure {
    transform: translateY(34px) rotate(-1.2deg);
  }

  .page-about .about-stance-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.82fr);
    gap: 60px;
    align-items: start;
  }

  .page-about .about-scene-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.9fr) minmax(0, 1fr);
    gap: 22px;
  }

  .page-about .about-scene--b {
    transform: translateY(26px);
  }
}

@media (min-width: 1200px) {
  .page-about .about-hero-copy h1 {
    max-width: 13ch;
  }

  .page-about .about-principles {
    gap: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-about .about-hero-figure {
    transform: none;
  }

  .page-about .about-scene--b {
    transform: none;
  }
}