/* ===== 品牌档案专属样式 ===== */
.page-about {
  --cut: 12px;              /* 切角大小 */
  --timeline-line-color: #FF6B35;
  --hero-decor-color: #FF6B35;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding: 1rem;
}

/* 首屏杂志封面风格 */
.page-about__hero {
  position: relative;
  overflow: hidden;
  padding: 2rem 1rem;
  background: linear-gradient(135deg, var(--color-bg-dark) 0%, var(--color-bg-dark-alt) 100%);
  border-radius: 0;
  min-height: 60vh;
  display: flex;
  align-items: center;
}

.page-about__hero-content {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 2rem;
  position: relative;
  z-index: 2;
}

.page-about__hero-text {
  flex: 1 1 280px;
}

.page-about__hero-title {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(3rem, 10vw, 5rem);
  color: var(--color-primary);
  text-transform: uppercase;
  margin: 0 0 0.25rem;
  line-height: 1;
  letter-spacing: -0.02em;
}

.page-about__hero-subtitle {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  color: var(--color-accent-red);
  margin: 0 0 1rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.page-about__hero-lead {
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-surface);
  line-height: 1.6;
  max-width: 480px;
  margin-bottom: 1.5rem;
}

.page-about__hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.page-about__hero-links .btn {
  font-size: 0.9rem;
  padding: 0.6rem 1.2rem;
}

.page-about__hero-visual {
  flex: 0 0 auto;
  width: min(280px, 45vw);
  aspect-ratio: 1 / 1;
  position: relative;
}

.page-about__hero-image {
  width: 100%;
  height: 100%;
  object-fit: contain;
  filter: drop-shadow(0 4px 12px rgba(255, 107, 53, 0.3));
}

.page-about__hero-decor {
  position: absolute;
  right: -15%;
  top: -10%;
  width: 70%;
  height: 140%;
  background: repeating-linear-gradient(45deg, transparent, transparent 10px, var(--hero-decor-color) 10px, var(--hero-decor-color) 12px);
  opacity: 0.08;
  clip-path: polygon(20% 0%, 100% 0%, 100% 100%, 0% 100%);
  z-index: 1;
  pointer-events: none;
}

/* 通用章节容器 */
.page-about__section {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 0;
}

.page-about__section-inner {
  width: 100%;
}

.page-about__section-heading {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  color: var(--color-bg-dark);
  margin: 0 0 1.5rem;
  padding-left: 1rem;
  border-left: 6px solid var(--color-primary);
  line-height: 1.2;
}

/* 我们的理念 */
.page-about__idea-text {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-bg-dark);
  max-width: 720px;
}

.page-about__idea-text strong {
  color: var(--color-primary);
  font-weight: 700;
}

/* 核心特色网格 */
.page-about__features-grid {
  display: grid;
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.page-about__feature {
  background: var(--color-surface);
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  border: 1px solid var(--color-border-light);
  transition: transform 0.2s var(--transition-base);
}

.page-about__feature:hover {
  transform: translateY(-3px);
}

.page-about__feature-icon {
  width: 80px;
  height: 80px;
  margin-bottom: 1rem;
  border-radius: 50%;
  overflow: hidden;
  background: var(--color-bg-dark);
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-about__feature-icon-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-about__feature-title {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 1.1rem;
  margin: 0 0 0.5rem;
  color: var(--color-bg-dark);
}

.page-about__feature-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.page-about__features-visual {
  text-align: center;
}

.page-about__features-img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* 时间轴 */
.page-about__timeline-track {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding-left: 2rem;
  position: relative;
}

.page-about__timeline-track::before {
  content: '';
  position: absolute;
  left: 0.8rem;
  top: 0;
  bottom: 0;
  width: 3px;
  background: repeating-linear-gradient(180deg, var(--timeline-line-color) 0, var(--timeline-line-color) 8px, transparent 8px, transparent 16px);
}

.page-about__timeline-node {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  background: var(--color-surface);
  padding: 1.2rem 1rem;
  border: 1px solid var(--color-border-light);
  position: relative;
  clip-path: polygon(0% 0%, calc(100% - var(--cut)) 0%, 100% var(--cut), 100% 100%, 0% 100%);
  transition: background 0.2s;
}

.page-about__timeline-node:hover {
  background: #f5efe8;
}

.page-about__timeline-marker {
  flex-shrink: 0;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-primary);
  position: relative;
  top: 4px;
  margin-left: -0.3rem;
  box-shadow: 0 0 0 3px var(--color-bg-dark);
}

.page-about__timeline-content {
  flex: 1;
}

.page-about__timeline-title {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 1.05rem;
  margin: 0 0 0.25rem;
  color: var(--color-bg-dark);
}

.page-about__timeline-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* 品牌标识 */
.page-about__brand-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  align-items: center;
}

.page-about__brand-logo {
  flex: 0 0 auto;
  width: min(320px, 80vw);
  aspect-ratio: 1 / 1;
}

.page-about__brand-logo-img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.page-about__brand-colors {
  flex: 1 1 240px;
}

.page-about__brand-colors-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  margin: 0 0 1rem;
  color: var(--color-bg-dark);
}

.page-about__brand-color-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.page-about__brand-color-list li {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.95rem;
  color: var(--color-bg-dark);
}

.page-about__color-swatch {
  display: inline-block;
  width: 28px;
  height: 28px;
  border-radius: 4px;
  border: 1px solid rgba(0,0,0,0.1);
  flex-shrink: 0;
}

/* 滚动显现 */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* 媒体查询：移动端优先 */
@media (max-width: 767px) {
  .page-about {
    padding: 0.75rem;
    gap: 1.5rem;
  }

  .page-about__hero {
    min-height: auto;
    padding: 1.5rem 0.75rem;
  }

  .page-about__hero-content {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .page-about__hero-text {
    order: 2;
  }

  .page-about__hero-visual {
    order: 1;
    width: min(200px, 60vw);
  }

  .page-about__hero-title {
    font-size: 2.5rem;
  }

  .page-about__hero-links {
    justify-content: center;
  }

  .page-about__features-grid {
    grid-template-columns: 1fr;
  }

  .page-about__timeline-track {
    padding-left: 1.5rem;
  }

  .page-about__timeline-marker {
    width: 12px;
    height: 12px;
    margin-left: -0.25rem;
  }

  .page-about__brand-grid {
    flex-direction: column;
    align-items: center;
  }

  .page-about__brand-logo {
    width: 60vw;
  }
}

@media (min-width: 768px) {
  .page-about {
    padding: 2rem;
  }

  .page-about__features-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-about__hero-content {
    flex-wrap: nowrap;
  }

  .page-about__hero-visual {
    width: min(320px, 40vw);
  }
}

/* 桌面大屏优化 */
@media (min-width: 1200px) {
  .page-about__hero {
    padding: 3rem 2rem;
  }

  .page-about__section-heading {
    font-size: 2.5rem;
  }
}