.page-about {
  --about-gold-border: rgba(255, 215, 0, 0.26);
  --about-gold-border-soft: rgba(255, 215, 0, 0.13);
  --about-panel-dark: rgba(255, 255, 255, 0.04);
  --about-text-cream: rgba(245, 245, 220, 0.84);
  --about-text-cream-dim: rgba(245, 245, 220, 0.7);
  background: var(--black);
  color: var(--cream);
  overflow-x: hidden;
}

.page-about .container {
  padding-top: clamp(48px, 7vw, 88px);
  padding-bottom: clamp(48px, 7vw, 88px);
}

.page-about figure {
  margin: 0;
}

.page-about .about-section-head {
  max-width: 740px;
  margin-bottom: clamp(32px, 5vw, 56px);
}

.page-about .about-section-head h2 {
  font-family: var(--font-sans);
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 900;
  line-height: 1.2;
  margin: 10px 0 14px;
  letter-spacing: -0.01em;
}

.page-about .about-section-head .section-subtitle {
  color: var(--gray);
  font-size: 16px;
  line-height: 1.8;
  margin: 0;
}

.page-about .about-section-head.light h2 {
  color: var(--white);
}

.page-about .about-section-head.light .section-subtitle {
  color: var(--about-text-cream-dim);
}

/* 品牌坐标首屏 */
.page-about .page-about-hero {
  position: relative;
  background-color: var(--black);
  background-image:
    linear-gradient(rgba(255, 215, 0, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 215, 0, 0.07) 1px, transparent 1px);
  background-size: 44px 44px;
  border-bottom: 1px solid var(--about-gold-border);
  padding-top: 32px;
}

.page-about .page-about-hero::before {
  content: "";
  position: absolute;
  right: -120px;
  top: -120px;
  width: 360px;
  height: 360px;
  border: 1px solid var(--about-gold-border);
  border-radius: 50%;
  box-shadow:
    0 0 0 28px rgba(255, 215, 0, 0.035),
    0 0 0 56px rgba(255, 215, 0, 0.025);
  pointer-events: none;
}

.page-about .about-hero-layout {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: 36px;
}

.page-about .about-hero-copy {
  color: var(--white);
}

.page-about .about-hero-copy h1 {
  font-family: var(--font-sans);
  font-size: clamp(30px, 5vw, 56px);
  font-weight: 900;
  line-height: 1.14;
  margin: 16px 0 20px;
  letter-spacing: -0.02em;
}

.page-about .about-h1-sub {
  display: block;
  color: var(--gold);
  font-family: var(--font-serif);
  font-size: 0.62em;
  font-weight: 700;
  margin-top: 10px;
  letter-spacing: 0.01em;
}

.page-about .about-hero-desc {
  font-size: 17px;
  line-height: 1.85;
  color: var(--about-text-cream);
  max-width: 58ch;
  margin: 0;
}

.page-about .about-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.page-about .about-hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 36px 0 0;
  padding: 0;
  list-style: none;
}

.page-about .about-hero-meta .meta-item {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--about-gold-border-soft);
  border-radius: var(--radius-m);
  padding: 16px 10px;
  text-align: center;
}

.page-about .about-hero-meta .meta-num {
  display: block;
  color: var(--gold);
  font-size: clamp(21px, 3vw, 30px);
  font-weight: 900;
  line-height: 1.1;
  white-space: nowrap;
}

.page-about .about-hero-meta .meta-label {
  display: block;
  color: var(--about-text-cream-dim);
  font-size: 12px;
  letter-spacing: 0.08em;
  margin-top: 6px;
}

.page-about .about-hero-visual {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  padding: 8px 0 12px;
}

.page-about .hero-coin {
  position: relative;
  width: min(54vw, 232px);
  height: min(54vw, 232px);
  border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, rgba(255, 215, 0, 0.28), rgba(255, 215, 0, 0.04) 70%);
  border: clamp(6px, 1.4vw, 12px) solid var(--gold-deep);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow:
    0 0 0 22px rgba(255, 215, 0, 0.06),
    0 0 56px rgba(255, 215, 0, 0.2);
}

.page-about .hero-coin::after {
  content: "";
  position: absolute;
  inset: 12px;
  border: 1px dashed rgba(255, 215, 0, 0.32);
  border-radius: 50%;
}

.page-about .hero-coin-square {
  position: absolute;
  width: 42px;
  height: 42px;
  background: var(--black);
  border-radius: 4px;
  z-index: 0;
}

.page-about .hero-coin-text {
  position: relative;
  z-index: 1;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(38px, 6vw, 56px);
  color: var(--gold);
  line-height: 1;
}

.page-about .hero-coin-label {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 15px;
  letter-spacing: 0.28em;
  color: rgba(245, 245, 220, 0.6);
}

/* 品牌故事 */
.page-about .about-story {
  position: relative;
  background: var(--cream);
  color: var(--black);
}

.page-about .about-story::before {
  content: "";
  position: absolute;
  right: clamp(16px, 5vw, 72px);
  top: 60px;
  width: 168px;
  height: 168px;
  border-radius: 50%;
  border: 16px solid rgba(218, 165, 32, 0.16);
  pointer-events: none;
}

.page-about .about-story-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.page-about .about-story-copy p {
  color: rgba(26, 26, 26, 0.78);
  font-size: 17px;
  line-height: 1.9;
  margin: 0 0 16px;
}

.page-about .about-story-copy strong {
  color: var(--red);
  font-weight: 700;
}

.page-about .about-story-points {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: 28px;
}

.page-about .about-point {
  border-left: 3px solid var(--gold-deep);
  background: rgba(255, 255, 255, 0.65);
  padding: 18px 20px;
  border-radius: 0 var(--radius-m) var(--radius-m) 0;
}

.page-about .about-point-index {
  color: var(--red);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
}

.page-about .about-point strong {
  display: block;
  font-size: 18px;
  font-weight: 800;
  margin: 6px 0 4px;
}

.page-about .about-point p {
  margin: 0;
  color: var(--gray);
  font-size: 15px;
  line-height: 1.7;
}

.page-about .about-story-figure {
  border-radius: var(--radius-l);
  overflow: hidden;
  box-shadow: var(--shadow-l);
  border: 1px solid rgba(218, 165, 32, 0.32);
  position: relative;
}

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

/* 发展历程时间轴 */
.page-about .about-timeline {
  background-color: var(--black);
  background-image:
    linear-gradient(rgba(255, 215, 0, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 215, 0, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  color: var(--white);
}

.page-about .about-timeline-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}

.page-about .about-timeline-list {
  position: relative;
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-about .about-timeline-list::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: linear-gradient(to bottom, var(--gold), rgba(255, 215, 0, 0.12));
}

.page-about .about-timeline-item {
  position: relative;
  padding-left: 44px;
  margin-bottom: 18px;
}

.page-about .about-timeline-item::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 26px;
  width: 13px;
  height: 13px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(255, 215, 0, 0.2);
  z-index: 1;
}

.page-about .about-timeline-details {
  background: var(--about-panel-dark);
  border: 1px solid var(--about-gold-border-soft);
  border-radius: var(--radius-m);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-timeline-details:hover,
.page-about .about-timeline-details[open] {
  border-color: var(--about-gold-border);
  box-shadow: var(--shadow-gold);
}

.page-about .about-timeline-details summary {
  display: flex;
  align-items: center;
  gap: 14px;
  list-style: none;
  padding: 16px 18px;
  cursor: pointer;
  user-select: none;
}

.page-about .about-timeline-details summary::-webkit-details-marker {
  display: none;
}

.page-about .about-timeline-details summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--gold);
  transition: transform var(--dur) var(--ease);
}

.page-about .about-timeline-details[open] summary::after {
  transform: rotate(45deg);
}

.page-about .timeline-year {
  color: var(--gold);
  font-family: var(--font-mono);
  font-size: 17px;
  font-weight: 700;
  min-width: 48px;
  letter-spacing: 0.02em;
}

.page-about .timeline-title {
  font-weight: 700;
  font-size: 16px;
  color: var(--white);
}

.page-about .timeline-body {
  padding: 0 18px 18px;
  color: var(--about-text-cream-dim);
  font-size: 15px;
  line-height: 1.8;
}

.page-about .timeline-body p {
  margin: 0;
}

.page-about .about-timeline-visual {
  position: relative;
}

.page-about .about-timeline-figure {
  border-radius: var(--radius-l);
  overflow: hidden;
  border: 1px solid var(--about-gold-border-soft);
  box-shadow: var(--shadow-l);
}

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

.page-about .about-timeline-note {
  margin: 14px 0 0;
  color: var(--about-text-cream-dim);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

/* 资质与荣誉 */
.page-about .about-honor {
  background: var(--cream);
  color: var(--black);
}

.page-about .about-honor-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .about-honor-card {
  background: var(--white);
  border: 1px solid rgba(26, 26, 26, 0.08);
  border-top: 3px solid var(--gold-deep);
  border-radius: var(--radius-m);
  padding: 24px;
  box-shadow: var(--shadow-s);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-honor-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-m);
}

.page-about .honor-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(218, 165, 32, 0.14);
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
}

.page-about .honor-icon svg {
  width: 26px;
  height: 26px;
  color: var(--gold-dark);
}

.page-about .about-honor-card h3 {
  font-family: var(--font-sans);
  font-size: 19px;
  font-weight: 800;
  margin: 0 0 8px;
}

.page-about .about-honor-card p {
  color: var(--gray);
  font-size: 15px;
  line-height: 1.75;
  margin: 0 0 16px;
}

.page-about .about-honor-visual {
  position: relative;
  border-radius: var(--radius-l);
  overflow: hidden;
  transition: filter var(--dur) var(--ease), transform var(--dur) var(--ease);
}

.page-about .about-honor-visual:hover {
  filter: drop-shadow(0 0 28px rgba(255, 215, 0, 0.45));
  transform: translateY(-2px);
}

.page-about .about-honor-figure {
  border-radius: var(--radius-l);
  overflow: hidden;
  border: 1px solid rgba(218, 165, 32, 0.3);
}

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

.page-about .about-honor-caption {
  position: absolute;
  left: 16px;
  bottom: 16px;
  margin: 0;
  padding: 8px 14px;
  background: rgba(26, 26, 26, 0.78);
  color: var(--gold);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-pill);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 215, 0, 0.2);
}

/* 收藏案例合集 */
.page-about .about-case {
  background-color: var(--black);
  background-image:
    radial-gradient(circle at 88% 8%, rgba(255, 215, 0, 0.14), transparent 38%),
    linear-gradient(rgba(255, 215, 0, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 215, 0, 0.045) 1px, transparent 1px);
  background-size: auto, 56px 56px, 56px 56px;
  color: var(--white);
}

.page-about .about-case-banner {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: linear-gradient(120deg, rgba(255, 215, 0, 0.22), rgba(218, 165, 32, 0.1));
  border: 1px solid var(--about-gold-border);
  border-radius: var(--radius-l);
  padding: 24px;
  margin-bottom: 28px;
}

.page-about .about-case-banner-text {
  margin: 0;
  color: rgba(245, 245, 220, 0.86);
  font-size: 16px;
  line-height: 1.8;
}

.page-about .about-case-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .about-case-card {
  background: var(--about-panel-dark);
  border: 1px solid var(--about-gold-border-soft);
  border-radius: var(--radius-m);
  padding: 26px;
  position: relative;
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-about .about-case-card:hover {
  border-color: var(--gold);
  background: rgba(255, 215, 0, 0.05);
  transform: translateY(-4px);
}

.page-about .about-case-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 16px;
}

.page-about .about-case-index {
  font-family: var(--font-mono);
  color: var(--gold);
  font-size: 14px;
  letter-spacing: 0.08em;
}

.page-about .about-case-card h3 {
  font-size: 21px;
  font-weight: 800;
  margin: 0 0 10px;
}

.page-about .about-case-card p {
  color: var(--about-text-cream-dim);
  font-size: 15px;
  line-height: 1.8;
  margin: 0;
}

.page-about .about-case-footer {
  text-align: center;
  margin-top: 32px;
}

/* 用户体验承诺 */
.page-about .about-promise {
  background: var(--cream);
  color: var(--black);
}

.page-about .about-promise-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
}

.page-about .about-promise-item {
  background: var(--white);
  border-radius: var(--radius-l);
  padding: 30px 24px;
  text-align: center;
  box-shadow: var(--shadow-s);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-about .about-promise-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-m);
}

.page-about .promise-num {
  display: block;
  font-family: var(--font-sans);
  font-size: clamp(34px, 5vw, 48px);
  font-weight: 900;
  line-height: 1.1;
  color: var(--gold-dark);
}

.page-about .about-promise-item h3 {
  font-size: 18px;
  font-weight: 800;
  margin: 10px 0 8px;
}

.page-about .about-promise-item p {
  color: var(--gray);
  font-size: 15px;
  line-height: 1.7;
  margin: 0;
}

.page-about .about-promise-contact {
  margin-top: 32px;
  padding: clamp(28px, 5vw, 44px);
  background: var(--black);
  color: var(--white);
  border-radius: var(--radius-l);
  text-align: center;
  border: 1px solid var(--about-gold-border-soft);
}

.page-about .about-promise-contact h3 {
  font-family: var(--font-serif);
  font-size: clamp(22px, 3vw, 30px);
  margin: 0 0 10px;
}

.page-about .about-promise-contact-note {
  color: var(--about-text-cream-dim);
  font-size: 16px;
  line-height: 1.8;
  margin: 0 0 24px;
}

/* 桌面端布局 */
@media (min-width: 768px) {
  .page-about .about-hero-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(280px, 0.75fr);
    gap: clamp(32px, 5vw, 64px);
    align-items: center;
  }

  .page-about .about-hero-visual {
    padding: 20px 0;
  }

  .page-about .about-story-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(300px, 0.92fr);
    gap: clamp(32px, 6vw, 72px);
    align-items: center;
  }

  .page-about .about-story-points {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-about .about-timeline-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(280px, 0.95fr);
    gap: clamp(36px, 6vw, 72px);
    align-items: start;
  }

  .page-about .about-honor-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .about-honor-visual {
    grid-column: 1 / -1;
  }

  .page-about .about-case-banner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    padding: 28px;
  }

  .page-about .about-case-banner-text {
    max-width: 65ch;
  }

  .page-about .about-case-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .page-about .about-promise-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
}

@media (min-width: 1120px) {
  .page-about .about-honor-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }

  .page-about .about-honor-card {
    grid-column: span 2;
  }

  .page-about .about-honor-visual {
    grid-column: span 6;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 32px;
    align-items: center;
  }

  .page-about .about-honor-visual .about-honor-caption {
    position: static;
    background: transparent;
    border: 0;
    padding: 0;
    font-size: clamp(22px, 2.4vw, 34px);
    font-family: var(--font-serif);
    color: var(--gold-dark);
    border-left: 4px solid var(--gold-deep);
    padding-left: 24px;
    line-height: 1.5;
    backdrop-filter: none;
    border-radius: 0;
  }

  .page-about .about-timeline-list::before {
    left: 13px;
  }

  .page-about .about-timeline-item {
    padding-left: 52px;
  }

  .page-about .about-timeline-item::before {
    left: 7px;
  }
}