/* ===== 品牌概况页面专属样式 ===== */
.page-about {
  --color-about-accent: #C9A84C;
  --color-about-dark: #0A5C36;
  --color-about-dark-bg: #0D1B1A;
  --color-about-light-bg: #F2F2F2;
  --color-about-text: #1A1A1A;
  --color-about-text-light: #EAEAEA;
  --color-about-mid-gray: #B0B0B0;
  --color-about-card-bg: #FFFFFF;
  --color-about-border: rgba(201, 168, 76, 0.25);
  --about-transition: 0.3s ease;
  --about-spacing-xs: 0.25rem;
  --about-spacing-sm: 0.5rem;
  --about-spacing-md: 1rem;
  --about-spacing-lg: 2rem;
  --about-spacing-xl: 3rem;
  --about-spacing-xxl: 4rem;
  --about-font-headings: 'Plus Jakarta Sans', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --about-font-body: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --about-font-data: 'JetBrains Mono', 'Consolas', monospace;
}

/* ---- 面包屑 ---- */
.page-about .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 0 0.5rem;
  font-family: var(--about-font-body);
  font-size: 0.75rem;
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-about-mid-gray);
}
.page-about .breadcrumb a {
  color: var(--color-about-mid-gray);
  text-decoration: none;
  transition: color var(--about-transition);
}
.page-about .breadcrumb a:hover {
  color: var(--color-about-accent);
}
.page-about .breadcrumb__sep {
  color: var(--color-about-accent);
  margin: 0 0.25rem;
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--color-about-dark);
  font-weight: 400;
}

/* ---- Hero 首屏 ---- */
.page-about__hero {
  padding: var(--about-spacing-lg) 0 var(--about-spacing-xxl);
  position: relative;
  overflow: hidden;
}
.page-about__hero-inner {
  display: flex;
  flex-direction: column;
  gap: var(--about-spacing-xl);
}
.page-about__hero-left {
  position: relative;
  z-index: 2;
}
.page-about__hero-label {
  display: inline-block;
  font-family: var(--about-font-body);
  font-size: 0.75rem;
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-about-accent);
  margin-bottom: var(--about-spacing-sm);
}
.page-about__hero-title {
  font-family: var(--about-font-headings);
  font-weight: 700;
  font-size: clamp(2.2rem, 6vw, 3.6rem);
  line-height: 1.1;
  color: var(--color-about-dark);
  margin: 0 0 var(--about-spacing-xs);
}
.page-about__hero-motto {
  font-family: var(--about-font-body);
  font-size: clamp(0.9rem, 2vw, 1.1rem);
  font-weight: 300;
  color: var(--color-about-mid-gray);
  margin: 0 0 var(--about-spacing-md);
  letter-spacing: 0.02em;
}
.page-about__hero-deco {
  display: flex;
  align-items: center;
  gap: var(--about-spacing-sm);
  margin-top: var(--about-spacing-sm);
}
.page-about__hero-deco-line {
  flex-shrink: 0;
}
.page-about__hero-deco-text {
  font-family: var(--about-font-body);
  font-size: 0.65rem;
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--color-about-accent);
  opacity: 0.6;
}
.page-about__hero-right {
  position: relative;
  z-index: 1;
}
.page-about__hero-img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 0;
  box-shadow: var(--shadow-md);
}
.page-about__hero-overlay {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 60%;
  height: 40%;
  pointer-events: none;
  opacity: 0.4;
}
.page-about__hero-flow {
  width: 100%;
  height: 100%;
}

/* ---- 平台定位 ---- */
.page-about__position {
  padding: var(--about-spacing-xxl) 0;
  background: var(--color-about-light-bg);
  position: relative;
}
.page-about__position-grid {
  display: flex;
  flex-direction: column;
  gap: var(--about-spacing-xl);
}
.page-about__position-left {
  flex-shrink: 0;
}
.page-about__section-index {
  display: block;
  font-family: var(--about-font-data);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-about-accent);
  margin-bottom: var(--about-spacing-xs);
  letter-spacing: 0.05em;
}
.page-about__section-heading {
  font-family: var(--about-font-headings);
  font-weight: 700;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  line-height: 1.2;
  color: var(--color-about-dark);
  margin: 0 0 var(--about-spacing-sm);
}
.page-about__position-deco,
.page-about__services-deco,
.page-about__values-deco,
.page-about__contact-deco {
  margin-top: var(--about-spacing-sm);
}
.page-about__position-right {
  flex: 1;
}
.page-about__position-text {
  font-family: var(--about-font-body);
  font-size: clamp(0.95rem, 1.5vw, 1.05rem);
  line-height: 1.7;
  color: var(--color-about-text);
  margin: 0 0 var(--about-spacing-lg);
  max-width: 600px;
}
.page-about__position-device {
  margin-top: var(--about-spacing-md);
}
.page-about__position-device-img {
  display: block;
  width: 100%;
  max-width: 300px;
  height: auto;
  object-fit: contain;
  opacity: 0.8;
}

/* ---- 核心服务 ---- */
.page-about__services {
  padding: var(--about-spacing-xxl) 0;
  background: var(--color-about-light-bg);
}
.page-about__services-header {
  margin-bottom: var(--about-spacing-xl);
}
.page-about__services-grid {
  display: flex;
  flex-direction: column;
  gap: var(--about-spacing-md);
  margin-bottom: var(--about-spacing-xl);
}
.page-about__service-card {
  position: relative;
  background: var(--color-about-card-bg);
  padding: var(--about-spacing-lg);
  border-left: 3px solid var(--color-about-accent);
  box-shadow: var(--shadow-sm);
  cursor: pointer;
  transition: box-shadow var(--about-transition), transform var(--about-transition);
  user-select: none;
}
.page-about__service-card:hover {
  box-shadow: 0 4px 20px rgba(201, 168, 76, 0.18);
  transform: translateY(-2px);
}
.page-about__service-card:focus-visible {
  outline: 2px solid var(--color-about-accent);
  outline-offset: 2px;
}
.page-about__service-card-num {
  font-family: var(--about-font-data);
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-about-accent);
  margin-bottom: var(--about-spacing-xs);
  letter-spacing: 0.05em;
}
.page-about__service-card-title {
  font-family: var(--about-font-headings);
  font-weight: 700;
  font-size: clamp(1.1rem, 2.5vw, 1.4rem);
  color: var(--color-about-dark);
  margin: 0 0 var(--about-spacing-xs);
}
.page-about__service-card-summary {
  font-family: var(--about-font-body);
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--color-about-mid-gray);
  margin: 0;
}
.page-about__service-card-detail {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, margin 0.3s ease;
  margin-top: 0;
}
.page-about__service-card-detail p {
  font-family: var(--about-font-body);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--color-about-text);
  margin: 0;
  padding-top: var(--about-spacing-sm);
  border-top: 1px solid var(--color-about-border);
}
.page-about__service-card[aria-expanded="true"] .page-about__service-card-detail {
  max-height: 200px;
  margin-top: var(--about-spacing-md);
}
.page-about__service-card[aria-expanded="true"] .page-about__service-card-icon svg {
  transform: rotate(90deg);
}
.page-about__service-card-icon {
  position: absolute;
  top: var(--about-spacing-lg);
  right: var(--about-spacing-lg);
  width: 24px;
  height: 24px;
  transition: transform var(--about-transition);
}
.page-about__service-card-icon svg {
  display: block;
  width: 24px;
  height: 24px;
  transition: transform var(--about-transition);
}
.page-about__services-map {
  margin-top: var(--about-spacing-lg);
  position: relative;
}
.page-about__services-map-img {
  display: block;
  width: 100%;
  max-width: 600px;
  height: auto;
  object-fit: cover;
  box-shadow: var(--shadow-sm);
}
.page-about__services-map-hint {
  display: flex;
  gap: 0.5rem;
  margin-top: var(--about-spacing-sm);
  flex-wrap: wrap;
}
.page-about__services-map-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-about-accent);
  cursor: pointer;
  transition: transform var(--about-transition), box-shadow var(--about-transition);
}
.page-about__services-map-dot:hover {
  transform: scale(1.4);
  box-shadow: 0 0 8px rgba(201, 168, 76, 0.5);
}
.page-about__services-map-caption {
  font-family: var(--about-font-body);
  font-size: 0.8rem;
  color: var(--color-about-mid-gray);
  margin: var(--about-spacing-xs) 0 0;
  font-style: italic;
}

/* ---- 用户价值 ---- */
.page-about__values {
  padding: var(--about-spacing-xxl) 0;
  background: var(--color-about-card-bg);
}
.page-about__values-grid {
  display: flex;
  flex-direction: column;
  gap: var(--about-spacing-xl);
}
.page-about__values-left {
  flex-shrink: 0;
}
.page-about__values-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: var(--about-spacing-lg);
}
.page-about__values-item {
  display: flex;
  gap: var(--about-spacing-md);
  align-items: flex-start;
  padding-bottom: var(--about-spacing-md);
  border-bottom: 1px solid var(--color-about-border);
}
.page-about__values-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.page-about__values-item-num {
  flex-shrink: 0;
  font-family: var(--about-font-data);
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-about-accent);
  width: 2rem;
  line-height: 1.4;
}
.page-about__values-item-content {
  flex: 1;
}
.page-about__values-item-title {
  display: block;
  font-family: var(--about-font-headings);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--color-about-dark);
  margin-bottom: var(--about-spacing-xs);
}
.page-about__values-item-content p {
  font-family: var(--about-font-body);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--color-about-text);
  margin: 0;
}

/* ---- 联系方式 ---- */
.page-about__contact {
  padding: var(--about-spacing-xxl) 0;
  background: var(--color-about-dark-bg);
  color: var(--color-about-text-light);
}
.page-about__contact-inner {
  display: flex;
  flex-direction: column;
  gap: var(--about-spacing-xl);
}
.page-about__contact-left {
  flex-shrink: 0;
}
.page-about__section-index--light {
  color: var(--color-about-accent);
}
.page-about__section-heading--light {
  color: var(--color-about-text-light);
}
.page-about__contact-desc {
  font-family: var(--about-font-body);
  font-size: 0.95rem;
  line-height: 1.6;
  color: rgba(234, 234, 234, 0.8);
  margin: 0 0 var(--about-spacing-lg);
  max-width: 500px;
}
.page-about__contact-list {
  display: flex;
  flex-direction: column;
  gap: var(--about-spacing-md);
  margin: 0 0 var(--about-spacing-lg);
  padding: 0;
}
.page-about__contact-item {
  display: flex;
  flex-wrap: wrap;
  gap: var(--about-spacing-sm);
  padding: var(--about-spacing-sm) 0;
  border-bottom: 1px solid rgba(201, 168, 76, 0.2);
}
.page-about__contact-label {
  font-family: var(--about-font-body);
  font-size: 0.8rem;
  font-weight: 300;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-about-accent);
  min-width: 4rem;
}
.page-about__contact-value {
  font-family: var(--about-font-body);
  font-size: 0.95rem;
  color: var(--color-about-text-light);
  margin: 0;
}
.page-about__contact-note {
  font-family: var(--about-font-body);
  font-size: 0.8rem;
  color: rgba(234, 234, 234, 0.5);
  margin: 0 0 var(--about-spacing-lg);
  font-style: italic;
}
.page-about__contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--about-spacing-md);
}
.page-about__contact-actions .btn--primary {
  background: var(--color-about-accent);
  color: var(--color-about-dark-bg);
  border: none;
}
.page-about__contact-actions .btn--primary:hover {
  background: var(--color-accent-gold-light);
  box-shadow: var(--shadow-glow-gold);
}
.page-about__contact-actions .btn--ghost {
  background: transparent;
  color: var(--color-about-accent);
  border: 1px solid var(--color-about-accent);
}
.page-about__contact-actions .btn--ghost:hover {
  background: rgba(201, 168, 76, 0.1);
  box-shadow: var(--shadow-glow-gold);
}

/* ---- 通用按钮重定义（作用域内） ---- */
.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.65rem 1.6rem;
  font-family: var(--about-font-body);
  font-size: 0.85rem;
  font-weight: 500;
  text-decoration: none;
  border-radius: 0;
  cursor: pointer;
  transition: background var(--about-transition), color var(--about-transition), box-shadow var(--about-transition);
}
.page-about .btn:focus-visible {
  outline: 2px solid var(--color-about-accent);
  outline-offset: 2px;
}

/* ---- grid 重置（作用域内） ---- */
.page-about .grid--2 {
  display: flex;
  flex-direction: column;
  gap: var(--about-spacing-xl);
}

/* ===== 响应式 ===== */
@media (min-width: 768px) {
  .page-about__hero {
    padding: var(--about-spacing-xl) 0 var(--about-spacing-xxl);
  }
  .page-about__hero-inner {
    flex-direction: row;
    align-items: center;
    gap: var(--about-spacing-xxl);
  }
  .page-about__hero-left {
    flex: 0 0 35%;
    max-width: 35%;
  }
  .page-about__hero-right {
    flex: 1;
    position: relative;
  }
  .page-about__hero-overlay {
    width: 50%;
    height: 50%;
  }

  .page-about__position-grid {
    flex-direction: row;
    gap: var(--about-spacing-xxl);
  }
  .page-about__position-left {
    flex: 0 0 30%;
    max-width: 30%;
  }
  .page-about__position-right {
    flex: 1;
  }

  .page-about__services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--about-spacing-lg);
  }
  .page-about__service-card {
    padding: var(--about-spacing-xl) var(--about-spacing-lg);
  }

  .page-about__values-grid {
    flex-direction: row;
    gap: var(--about-spacing-xxl);
  }
  .page-about__values-left {
    flex: 0 0 30%;
    max-width: 30%;
  }
  .page-about__values-right {
    flex: 1;
  }

  .page-about__contact-inner {
    flex-direction: row;
    gap: var(--about-spacing-xxl);
  }
  .page-about__contact-left {
    flex: 0 0 30%;
    max-width: 30%;
  }
  .page-about__contact-right {
    flex: 1;
  }

  .page-about .grid--2 {
    flex-direction: row;
  }
  .page-about__services-map-img {
    max-width: 600px;
  }
}

@media (min-width: 1024px) {
  .page-about__hero-title {
    font-size: 3.8rem;
  }
  .page-about__hero-left {
    flex: 0 0 32%;
    max-width: 32%;
  }
  .page-about__position-left,
  .page-about__values-left,
  .page-about__contact-left {
    flex: 0 0 28%;
    max-width: 28%;
  }
  .page-about__services-grid {
    gap: var(--about-spacing-xl);
  }
}

/* ---- 滚动显现（渐进增强） ---- */
.page-about [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.page-about [data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}