.page-about {
  position: relative;
  overflow-x: hidden;
  background:
    radial-gradient(ellipse at 85% 5%, rgba(165, 94, 234, 0.09), transparent 42rem),
    linear-gradient(180deg, #0d1117 0%, rgba(13, 17, 23, 0.96) 100%);
}

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

/* 视野中的主章节分隔 */
.page-about .about-chapter {
  position: relative;
  padding: clamp(3.5rem, 7vw, 6.5rem) 0;
}

.page-about .about-chapter + .about-chapter {
  border-top: 1px solid rgba(184, 134, 11, 0.18);
}

/* 章节标题通用编排 */
.page-about .about-chapter-head {
  display: flex;
  align-items: flex-start;
  gap: 1.25rem;
  margin-bottom: 1.5rem;
  position: relative;
  z-index: 2;
}

.page-about .about-chapter-head-right {
  justify-content: flex-end;
  text-align: right;
}

.page-about .about-chapter-num {
  font-family: var(--font-mono);
  font-size: clamp(2.6rem, 6vw, 4.5rem);
  line-height: 0.9;
  font-weight: 700;
  letter-spacing: -0.05em;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(255, 110, 199, 0.5);
  flex-shrink: 0;
  min-width: 1.6em;
  text-align: right;
}

.page-about .about-chapter-head-right .about-chapter-num {
  order: 2;
  text-align: left;
}

.page-about .about-chapter-head h2 {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  line-height: 1.3;
  margin: 0.3rem 0 0;
  color: var(--clr-cream);
}

.page-about .about-chapter-lede {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: clamp(1rem, 1.4vw, 1.15rem);
  color: var(--clr-gray);
  max-width: 60ch;
  line-height: 1.85;
  margin: 0 0 2.5rem;
  padding-left: 1rem;
  border-left: 2px solid rgba(184, 134, 11, 0.4);
}

/* 进入区 */
.page-about .about-hero {
  position: relative;
  padding: clamp(2rem, 5vw, 4.5rem) 0 clamp(3rem, 6vw, 5rem);
}

.page-about .about-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(180deg, transparent 0px, transparent 3px, rgba(255, 255, 255, 0.015) 3px, rgba(255, 255, 255, 0.015) 4px);
  pointer-events: none;
}

.page-about .about-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.75rem;
  align-items: center;
}

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

.page-about .about-hero .breadcrumb {
  margin-bottom: 2.5rem;
}

.page-about .about-hero-kicker {
  display: inline-block;
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  color: var(--clr-gold);
  text-transform: uppercase;
  padding: 0.3rem 0.7rem;
  border: 1px solid rgba(184, 134, 11, 0.3);
  border-radius: 4px;
  background: rgba(184, 134, 11, 0.05);
  margin-bottom: 1.25rem;
}

.page-about .about-hero h1 {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(1.85rem, 4.5vw, 3.4rem);
  line-height: 1.2;
  color: var(--clr-cream);
  margin: 0 0 1.5rem;
  letter-spacing: 0.01em;
  position: relative;
  display: inline-block;
  transform: rotate(-0.8deg);
}

.page-about .about-hero h1::after {
  content: "";
  position: absolute;
  left: 0.2em;
  right: -0.4em;
  bottom: 0.1em;
  height: 0.34em;
  background: linear-gradient(100deg, rgba(165, 94, 234, 0.22), rgba(255, 110, 199, 0.12));
  z-index: -1;
  border-radius: 0.2em;
}

.page-about .about-hero-lead {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: clamp(0.95rem, 1.5vw, 1.15rem);
  line-height: 1.9;
  color: var(--clr-gray);
  max-width: 58ch;
  margin-bottom: 1.75rem;
  border-left: 3px solid rgba(184, 134, 11, 0.5);
  padding-left: 1.25rem;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}

.page-about .about-hero-figure {
  position: relative;
  max-width: 340px;
  margin: 0 auto;
  z-index: 1;
}

.page-about .about-hero-figure::before {
  content: "";
  position: absolute;
  inset: 12% -12% -8% 12%;
  background: linear-gradient(135deg, rgba(165, 94, 234, 0.15), rgba(255, 110, 199, 0.08));
  z-index: -1;
  border-radius: 4px;
  transform: rotate(-4deg);
}

.page-about .about-hero-img {
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 4 / 5;
  border-radius: 6px;
  filter: saturate(0.85) contrast(1.05);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  transform: rotate(1.5deg);
}

/* 01 时间线叙事 */
.page-about .about-chapter-timeline {
  background: linear-gradient(160deg, transparent 0%, rgba(184, 134, 11, 0.05) 25%, transparent 55%, rgba(165, 94, 234, 0.04) 100%);
}

.page-about .about-timeline {
  position: relative;
  padding-left: 2.5rem;
  margin-bottom: 3rem;
}

.page-about .about-timeline::before {
  content: "";
  position: absolute;
  left: 0.625rem;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, rgba(184, 134, 11, 0.45), rgba(165, 94, 234, 0.3), rgba(255, 110, 199, 0.15));
}

.page-about .about-timeline-item {
  position: relative;
  margin-bottom: 2.5rem;
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: -1.875rem;
  top: 0.4rem;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--clr-bg);
  border: 2px solid var(--clr-gold);
  box-shadow: 0 0 10px rgba(184, 134, 11, 0.35);
}

.page-about .about-timeline-item:hover::before {
  border-color: var(--clr-neon-pink);
  background: var(--clr-neon-pink);
  box-shadow: 0 0 14px rgba(255, 110, 199, 0.5);
}

.page-about .about-timeline-card {
  background: rgba(31, 38, 48, 0.55);
  border: 1px solid rgba(139, 148, 158, 0.2);
  border-radius: 10px;
  padding: 1.4rem 1.5rem;
  position: relative;
  transition:
    border-color var(--transition-smooth),
    transform var(--transition-smooth),
    box-shadow var(--transition-smooth);
}

.page-about .about-timeline-card:hover {
  border-color: rgba(165, 94, 234, 0.4);
  transform: translateX(4px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.35), 0 0 20px rgba(165, 94, 234, 0.06);
}

.page-about .about-timeline-year {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  letter-spacing: 0.1em;
  color: var(--clr-gold);
  display: inline-block;
  padding-bottom: 0.4rem;
  border-bottom: 1px solid rgba(184, 134, 11, 0.2);
}

.page-about .about-timeline-card h3 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.1rem;
  margin: 0.65rem 0 0.6rem;
  color: var(--clr-cream);
}

.page-about .about-timeline-card p {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--clr-gray);
  margin: 0;
}

/* 时间线末尾的小型归档照片 */
.page-about .about-timeline-figure {
  margin: 3rem 0 0;
  max-width: 520px;
  position: relative;
}

.page-about .about-timeline-figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 5 / 3;
  border-radius: 8px;
  filter: sepia(0.25) saturate(0.8) contrast(1.05);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.45);
}

.page-about .about-timeline-figure figcaption {
  margin-top: 0.75rem;
  font-size: 0.85rem;
  color: var(--clr-gray);
  font-family: var(--font-sans);
  font-weight: 300;
}

/* 02 老规矩 */
.page-about .about-chapter-rule {
  background: linear-gradient(180deg, transparent 0%, rgba(165, 94, 234, 0.05) 35%, transparent 100%);
}

.page-about .about-rule-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.page-about .about-rule-card {
  background: linear-gradient(135deg, rgba(31, 38, 48, 0.8), rgba(31, 38, 48, 0.4));
  border: 1px solid rgba(139, 148, 158, 0.18);
  border-radius: 12px;
  padding: 1.75rem;
  position: relative;
  overflow: hidden;
  transition:
    transform var(--transition-smooth),
    border-color var(--transition-smooth),
    box-shadow var(--transition-smooth);
}

.page-about .about-rule-card::after {
  content: "";
  position: absolute;
  right: -30px;
  bottom: -30px;
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(165, 94, 234, 0.09), transparent 70%);
  pointer-events: none;
}

.page-about .about-rule-card:hover {
  transform: translateY(-4px);
  border-color: rgba(184, 134, 11, 0.4);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.3), 0 0 24px rgba(184, 134, 11, 0.05);
}

.page-about .about-rule-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--clr-neon-pink);
  letter-spacing: 0.1em;
}

.page-about .about-rule-card h3 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.2rem;
  margin: 0.75rem 0 0.5rem;
  color: var(--clr-cream);
}

.page-about .about-rule-card p {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--clr-gray);
  margin: 0;
}

/* 03 数字背后 */
.page-about .about-chapter-numbers {
  background: radial-gradient(ellipse at 20% 40%, rgba(0, 212, 255, 0.05), transparent 60%),
    radial-gradient(ellipse at 85% 60%, rgba(165, 94, 234, 0.05), transparent 50%);
}

.page-about .about-stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 2.5rem;
}

.page-about .about-stat-block {
  background: rgba(13, 17, 23, 0.7);
  border: 1px solid rgba(139, 148, 158, 0.15);
  border-radius: 12px;
  padding: 1.5rem 1.25rem;
  text-align: center;
  position: relative;
  transition:
    border-color var(--transition-smooth),
    transform var(--transition-smooth),
    box-shadow var(--transition-smooth);
}

.page-about .about-stat-block:hover {
  border-color: rgba(0, 212, 255, 0.35);
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25), 0 0 20px rgba(0, 212, 255, 0.05);
}

.page-about .about-stat-value {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(2rem, 4vw, 2.8rem);
  color: var(--clr-cream);
  line-height: 1;
  display: block;
}

.page-about .about-stat-unit {
  font-size: 0.6em;
  color: var(--clr-neon-pink);
  margin-left: 2px;
}

.page-about .about-stat-label {
  display: block;
  margin-top: 0.6rem;
  font-size: 0.85rem;
  color: var(--clr-gold);
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
}

.page-about .about-stat-block p {
  font-size: 0.85rem;
  line-height: 1.6;
  color: var(--clr-gray);
  margin: 0.75rem 0 0;
  font-family: var(--font-sans);
  font-weight: 300;
}

.page-about .about-trust-note {
  max-width: 640px;
  margin: 0 auto;
  padding: 1.5rem 1.75rem;
  background: linear-gradient(120deg, rgba(184, 134, 11, 0.08), rgba(165, 94, 234, 0.05));
  border-radius: 10px;
  border-left: 3px solid var(--clr-gold);
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--clr-gray);
}

.page-about .about-trust-note p {
  margin: 0;
}

/* 04 原则 */
.page-about .about-chapter-principles {
  background: linear-gradient(135deg, rgba(255, 110, 199, 0.04), transparent 50%),
    linear-gradient(0deg, rgba(184, 134, 11, 0.03), transparent 50%);
}

.page-about .about-principles-figure {
  margin: 0 0 3rem;
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 16px 50px rgba(0, 0, 0, 0.4);
}

.page-about .about-principles-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(13, 17, 23, 0.7) 100%);
}

.page-about .about-principles-figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  aspect-ratio: 2 / 1;
  display: block;
  filter: brightness(0.65) saturate(0.72);
}

.page-about .about-principles-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.25rem;
}

.page-about .about-principle {
  position: relative;
  padding-left: 1.5rem;
  border-left: 1px solid rgba(255, 110, 199, 0.25);
  transition: border-color var(--transition-fast);
}

.page-about .about-principle:hover {
  border-left-color: rgba(184, 134, 11, 0.6);
}

.page-about .about-principle-index {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--clr-neon-pink);
  letter-spacing: 0.1em;
}

.page-about .about-principle h3 {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.2rem;
  margin: 0.5rem 0 0.6rem;
  color: var(--clr-cream);
}

.page-about .about-principle p {
  font-family: var(--font-sans);
  font-weight: 300;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--clr-gray);
  margin: 0;
  max-width: 56ch;
}

/* 收尾 CTA：暗红色块 */
.page-about .about-cta {
  padding: clamp(3rem, 6vw, 5rem) 0;
  background: linear-gradient(120deg, #2a1010, #1a1016, #0d1117);
  position: relative;
  overflow: hidden;
}

.page-about .about-cta::after {
  content: "";
  position: absolute;
  right: -10%;
  top: 50%;
  transform: translateY(-50%);
  width: 40%;
  height: 200%;
  background: radial-gradient(ellipse, rgba(255, 110, 199, 0.09), transparent 60%);
  pointer-events: none;
}

.page-about .about-cta-inner {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}

.page-about .about-cta-kicker {
  font-size: 0.82rem;
  letter-spacing: 0.14em;
  color: var(--clr-neon-pink);
  margin-bottom: 0.9rem;
}

.page-about .about-cta h2 {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  margin: 0 0 1rem;
  color: var(--clr-cream);
}

.page-about .about-cta p {
  color: var(--clr-gray);
  font-family: var(--font-sans);
  font-weight: 300;
  line-height: 1.8;
  margin-bottom: 1.75rem;
}

.page-about .about-cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.85rem;
}

/* 窄屏收尾保护 */
.page-about .about-hero-actions,
.page-about .about-cta-actions {
  align-items: stretch;
}

.page-about .about-hero-actions .btn,
.page-about .about-cta-actions .btn {
  flex: 0 1 auto;
  justify-content: center;
}

/* 平板与以上的错落编排 */
@media (min-width: 768px) {
  .page-about .about-hero-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 4rem;
  }

  .page-about .about-hero-figure {
    max-width: 420px;
    margin-left: auto;
    margin-right: 0;
    transform: translateX(-1rem);
  }

  .page-about .about-timeline {
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 5.5rem;
  }

  .page-about .about-timeline::before {
    left: 1rem;
  }

  .page-about .about-timeline-item::before {
    left: -4.5rem;
  }

  .page-about .about-timeline-card {
    margin-left: 0;
  }

  .page-about .about-timeline-item:nth-child(2n) .about-timeline-card {
    margin-left: 2.75rem;
  }

  .page-about .about-timeline-item:nth-child(3n) .about-timeline-card {
    margin-left: 1rem;
  }

  .page-about .about-timeline-item:nth-child(5n) .about-timeline-card {
    margin-left: 0.25rem;
  }

  .page-about .about-rule-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

  .page-about .about-rule-card:nth-child(even) {
    margin-top: 2.5rem;
  }

  .page-about .about-stats-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
  }

  .page-about .about-stat-block:nth-child(3n + 2) {
    margin-top: 1.5rem;
  }

  .page-about .about-principles-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 2.75rem 3rem;
  }

  .page-about .about-principle:nth-child(even) {
    margin-top: 3rem;
  }

  .page-about .about-timeline-figure {
    margin-left: auto;
    margin-right: 0;
  }
}

/* 更大桌面端的从容留白 */
@media (min-width: 1024px) {
  .page-about .about-hero {
    padding-top: clamp(2.5rem, 6vw, 5.5rem);
  }

  .page-about .about-rule-grid {
    gap: 2rem;
  }

  .page-about .about-stat-block {
    padding: 1.75rem 1.5rem;
  }

  .page-about .about-principles-list {
    gap: 3rem 4rem;
  }
}