/* ===== 品牌档案 page-about 专属样式 ===== */
.page-about {
  --about-hero-min-height: 70vh;
  --about-gold-line: 2px solid var(--color-gold, #D4AF37);
  --about-card-radius: 12px;
  --about-transition: 0.4s cubic-bezier(0.22, 1, 0.36, 1);
}

/* ----- 首屏：杂志封面 ----- */
.about-hero {
  position: relative;
  min-height: var(--about-hero-min-height);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--color-bg-dark, #0A1628);
}

.about-hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 30%;
  z-index: 0;
}

.about-hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(
    135deg,
    rgba(10, 22, 40, 0.85) 0%,
    rgba(26, 42, 74, 0.70) 50%,
    rgba(10, 22, 40, 0.90) 100%
  );
}

.about-hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 2rem 1.5rem;
  max-width: 800px;
  width: 100%;
}

.about-hero-breadcrumb {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.4rem;
  font-family: var(--font-body, 'Inter', 'Noto Sans SC', sans-serif);
  font-size: 0.8rem;
  color: var(--color-text-secondary, #A0AAB5);
  margin-bottom: 2rem;
  letter-spacing: 0.02em;
}

.about-hero-breadcrumb a {
  color: var(--color-text-secondary, #A0AAB5);
  text-decoration: none;
  transition: color var(--transition-base, 0.3s ease);
}

.about-hero-breadcrumb a:hover,
.about-hero-breadcrumb a:focus-visible {
  color: var(--color-gold, #D4AF37);
}

.about-hero-breadcrumb-sep {
  color: var(--color-gold, #D4AF37);
  opacity: 0.6;
}

.about-hero-breadcrumb [aria-current="page"] {
  color: var(--color-snow-white, #F5F7FA);
  font-weight: 500;
}

.about-hero-title {
  font-family: var(--font-heading, 'Noto Sans Tibetan', 'Tibetan Serif', serif);
  font-size: 2.8rem;
  font-weight: 700;
  color: var(--color-snow-white, #F5F7FA);
  margin: 0 0 1rem;
  letter-spacing: 0.06em;
  line-height: 1.15;
  text-shadow: 0 2px 20px rgba(0,0,0,0.4);
}

.about-hero-divider {
  width: 80px;
  height: 3px;
  background: var(--color-gold, #D4AF37);
  margin: 0.8rem auto 1.2rem;
  border-radius: 2px;
  box-shadow: 0 0 12px rgba(212, 175, 55, 0.4);
}

.about-hero-subtitle {
  font-family: var(--font-heading, 'Noto Sans Tibetan', 'Tibetan Serif', serif);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--color-gold, #D4AF37);
  margin: 0 0 0.6rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.about-hero-desc {
  font-family: var(--font-body, 'Inter', 'Noto Sans SC', sans-serif);
  font-size: 0.95rem;
  color: var(--color-text-secondary, #A0AAB5);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ----- 窄栏：品牌理念 ----- */
.about-philosophy {
  background: var(--color-snow-white, #F5F7FA);
  padding: 4rem 1.5rem;
  position: relative;
}

.about-philosophy-inner {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  padding: 1.5rem 0;
}

.about-philosophy-border {
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-gold, #D4AF37), transparent);
  margin: 0 auto;
  opacity: 0.5;
}

.about-philosophy-border:first-child {
  margin-bottom: 2.5rem;
}

.about-philosophy-border:last-child {
  margin-top: 2.5rem;
}

.about-philosophy-title {
  font-family: var(--font-heading, 'Noto Sans Tibetan', 'Tibetan Serif', serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-deep-blue, #0B1D3A);
  margin: 0 0 1.8rem;
  letter-spacing: 0.04em;
  line-height: 1.2;
}

.about-philosophy-text {
  font-family: var(--font-body, 'Inter', 'Noto Sans SC', sans-serif);
  font-size: 1rem;
  line-height: 1.85;
  color: #2A3A5A;
  margin: 0 auto 1.2rem;
  max-width: 580px;
}

.about-philosophy-text:last-of-type {
  margin-bottom: 0;
}

/* ----- 宽幅：数据根基 ----- */
.about-data {
  background: var(--gradient-hero, linear-gradient(135deg, #0A1628 0%, #1A2A4A 100%));
  padding: 4rem 1.5rem;
  position: relative;
}

.about-data-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

.about-data-visual {
  text-align: center;
}

.about-data-image {
  width: 100%;
  max-width: 260px;
  height: auto;
  aspect-ratio: 1/1;
  object-fit: contain;
  border-radius: 50%;
  background: rgba(212, 175, 55, 0.06);
  padding: 0.8rem;
  box-shadow: 0 0 40px rgba(212, 175, 55, 0.08);
  transition: transform var(--about-transition);
}

.about-data-image:hover {
  transform: scale(1.03);
}

.about-data-caption {
  font-family: var(--font-body, 'Inter', 'Noto Sans SC', sans-serif);
  font-size: 0.85rem;
  color: var(--color-gold, #D4AF37);
  margin-top: 1rem;
  letter-spacing: 0.08em;
  opacity: 0.7;
}

.about-data-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.about-card {
  background: var(--color-card-bg, rgba(255,255,255,0.08));
  border: 1px solid var(--color-border-subtle, rgba(212,175,55,0.3));
  border-radius: var(--about-card-radius);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: transform var(--about-transition), box-shadow var(--about-transition);
  overflow: hidden;
}

.about-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(212, 175, 55, 0.12);
  border-color: rgba(212, 175, 55, 0.5);
}

.about-card-summary {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1.2rem 1.5rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
}

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

.about-card-summary:focus-visible {
  outline: 2px solid var(--color-gold, #D4AF37);
  outline-offset: -2px;
  border-radius: var(--about-card-radius);
}

.about-card-number {
  font-family: var(--font-heading, 'Noto Sans Tibetan', 'Tibetan Serif', serif);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--color-gold, #D4AF37);
  line-height: 1;
  min-width: 80px;
}

.about-card-suffix {
  font-size: 1.2rem;
  font-weight: 500;
  color: var(--color-orange, #FF6B35);
  margin-left: 0.1rem;
}

.about-card-label {
  font-family: var(--font-body, 'Inter', 'Noto Sans SC', sans-serif);
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-primary, #E8ECF0);
  flex: 1;
}

.about-card-toggle {
  width: 20px;
  height: 20px;
  position: relative;
  flex-shrink: 0;
}

.about-card-toggle::before,
.about-card-toggle::after {
  content: '';
  position: absolute;
  background: var(--color-gold, #D4AF37);
  border-radius: 2px;
  transition: transform var(--about-transition);
}

.about-card-toggle::before {
  width: 2px;
  height: 14px;
  top: 3px;
  left: 9px;
}

.about-card-toggle::after {
  width: 14px;
  height: 2px;
  top: 9px;
  left: 3px;
}

details[open] .about-card-toggle::before {
  transform: rotate(90deg);
}

.about-card-detail {
  padding: 0 1.5rem 1.2rem;
  font-family: var(--font-body, 'Inter', 'Noto Sans SC', sans-serif);
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--color-text-secondary, #A0AAB5);
  border-top: 1px solid rgba(212, 175, 55, 0.15);
  margin: 0 1.2rem;
  padding-top: 0.9rem;
  padding-left: 0;
  padding-right: 0;
}

.about-card-detail p {
  margin: 0;
}

.about-icp {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 0.8rem;
  margin-top: 3rem;
  padding: 1.2rem 1.5rem;
  border: 1px solid rgba(212, 175, 55, 0.25);
  border-radius: 8px;
  background: rgba(212, 175, 55, 0.04);
  font-family: var(--font-body, 'Inter', 'Noto Sans SC', sans-serif);
  font-size: 0.85rem;
  color: var(--color-text-secondary, #A0AAB5);
}

.about-icp-badge {
  color: var(--color-gold, #D4AF37);
  font-weight: 500;
  letter-spacing: 0.03em;
}

.about-icp-sep {
  color: rgba(212, 175, 55, 0.35);
}

.about-icp-code {
  color: var(--color-text-secondary, #A0AAB5);
  letter-spacing: 0.02em;
}

/* ----- 使命：连接热爱 ----- */
.about-mission {
  background: var(--color-snow-white, #F5F7FA);
  padding: 4rem 1.5rem;
}

.about-mission-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
  max-width: 960px;
  margin: 0 auto;
}

.about-mission-image-wrap {
  text-align: center;
}

.about-mission-image {
  width: 100%;
  max-width: 220px;
  height: auto;
  aspect-ratio: 1/1;
  object-fit: contain;
  border-radius: 50%;
  background: rgba(212, 175, 55, 0.06);
  padding: 0.6rem;
  box-shadow: 0 0 30px rgba(212, 175, 55, 0.08);
}

.about-mission-text {
  text-align: center;
}

.about-mission-title {
  font-family: var(--font-heading, 'Noto Sans Tibetan', 'Tibetan Serif', serif);
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-deep-blue, #0B1D3A);
  margin: 0 0 1.2rem;
  letter-spacing: 0.04em;
}

.about-mission-desc {
  font-family: var(--font-body, 'Inter', 'Noto Sans SC', sans-serif);
  font-size: 1rem;
  line-height: 1.8;
  color: #2A3A5A;
  margin: 0 auto 0.8rem;
  max-width: 560px;
}

.about-mission-desc:last-of-type {
  margin-bottom: 2rem;
}

.about-mission-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.about-mission-links .btn {
  font-family: var(--font-body, 'Inter', 'Noto Sans SC', sans-serif);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.7rem 1.6rem;
  border: 1px solid var(--color-border-subtle, rgba(212,175,55,0.3));
  border-radius: 6px;
  background: transparent;
  color: var(--color-deep-blue, #0B1D3A);
  cursor: pointer;
  text-decoration: none;
  transition: background var(--transition-base, 0.3s ease), border-color var(--transition-base, 0.3s ease), color var(--transition-base, 0.3s ease);
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
}

.about-mission-links .btn:hover,
.about-mission-links .btn:focus-visible {
  background: var(--color-hover-overlay, rgba(212,175,55,0.1));
  border-color: var(--color-gold, #D4AF37);
  color: var(--color-deep-blue, #0B1D3A);
}

.about-mission-links .btn--gold {
  background: var(--color-gold, #D4AF37);
  border-color: var(--color-gold, #D4AF37);
  color: var(--color-bg-dark, #0A1628);
  font-weight: 600;
}

.about-mission-links .btn--gold:hover,
.about-mission-links .btn--gold:focus-visible {
  background: transparent;
  color: var(--color-gold, #D4AF37);
  border-color: var(--color-gold, #D4AF37);
}

/* ----- 响应式：平板及以上 ----- */
@media (min-width: 768px) {
  .about-hero {
    min-height: 100vh;
  }

  .about-hero-title {
    font-size: 4.5rem;
  }

  .about-hero-subtitle {
    font-size: 1.4rem;
  }

  .about-hero-desc {
    font-size: 1.1rem;
  }

  .about-philosophy {
    padding: 6rem 2rem;
  }

  .about-philosophy-title {
    font-size: 2.4rem;
  }

  .about-philosophy-text {
    font-size: 1.05rem;
  }

  .about-data {
    padding: 6rem 2rem;
  }

  .about-data-grid {
    grid-template-columns: 1fr 1.2fr;
    gap: 3.5rem;
  }

  .about-data-image {
    max-width: 320px;
  }

  .about-data-cards {
    gap: 1.2rem;
  }

  .about-card-number {
    font-size: 2.6rem;
    min-width: 90px;
  }

  .about-card-summary {
    padding: 1.4rem 1.8rem;
  }

  .about-mission {
    padding: 6rem 2rem;
  }

  .about-mission-grid {
    grid-template-columns: 1fr 1.3fr;
    gap: 3.5rem;
    text-align: left;
  }

  .about-mission-image-wrap {
    text-align: right;
  }

  .about-mission-image {
    max-width: 280px;
  }

  .about-mission-text {
    text-align: left;
  }

  .about-mission-desc {
    margin-left: 0;
    margin-right: 0;
  }

  .about-mission-links {
    justify-content: flex-start;
  }

  .about-icp {
    font-size: 0.9rem;
    gap: 1rem;
  }
}

/* ----- 桌面大屏微调 ----- */
@media (min-width: 1200px) {
  .about-hero-title {
    font-size: 5.5rem;
  }

  .about-hero-divider {
    width: 120px;
  }

  .about-philosophy-inner {
    padding: 2rem 0;
  }

  .about-data-grid {
    gap: 5rem;
  }

  .about-data-image {
    max-width: 360px;
  }

  .about-card-number {
    font-size: 3rem;
    min-width: 100px;
  }

  .about-mission-image {
    max-width: 320px;
  }
}