/* ===== 页面专属样式: .page-about ===== */
.page-about {
  --about-primary: #0B1A3A;
  --about-accent: #D4AF37;
  --about-secondary: #5B2D8E;
  --about-surface: #112240;
  --about-bg: #060E1E;
  --about-text: #E2E8F0;
  --about-text-muted: #94A3B8;
  --about-border: #1E3A5F;
  --about-gap: 1.5rem;
  --about-radius: 6px;
  --about-max-width: 1280px;
  --about-font-heading: 'Orbitron', 'Noto Sans SC', sans-serif;
  --about-font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --about-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---- 容器 ---- */
.page-about__container {
  max-width: var(--about-max-width);
  margin: 0 auto;
  padding: 0 1rem;
  background: var(--about-bg);
  color: var(--about-text);
  font-family: var(--about-font-body);
}

/* ---- 首屏 - 左右分屏 ---- */
.page-about__hero {
  display: flex;
  flex-direction: column;
  gap: var(--about-gap);
  padding: 2rem 0;
  min-height: auto;
}

.page-about__hero-left {
  flex: 1 1 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.page-about__hero-right {
  flex: 1 1 100%;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 300px;
  overflow: hidden;
  border-radius: var(--about-radius);
  background: transparent;
}

.page-about__hero-img {
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: contain;
  display: block;
  position: relative;
  z-index: 1;
}

.page-about__starscape {
  position: relative;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 旋转装饰环 */
.page-about__orbital-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 80%;
  padding-bottom: 80%;
  transform: translate(-50%, -50%);
  border: 1px solid rgba(212, 175, 55, 0.25);
  border-radius: 50%;
  pointer-events: none;
  animation: about-rotate 20s linear infinite;
  z-index: 0;
}

.page-about__orbital-ring--inner {
  width: 55%;
  padding-bottom: 55%;
  border-color: rgba(91, 45, 142, 0.3);
  border-width: 2px;
  animation-duration: 14s;
  animation-direction: reverse;
}

@keyframes about-rotate {
  0% { transform: translate(-50%, -50%) rotate(0deg); }
  100% { transform: translate(-50%, -50%) rotate(360deg); }
}

/* ---- 标题与编号 ---- */
.page-about__hero-title {
  font-family: var(--about-font-heading);
  font-size: 2rem;
  font-weight: 700;
  margin: 0.5rem 0;
  color: var(--about-text);
  letter-spacing: 0.02em;
}

.page-about__hero-subtitle {
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--about-accent);
  margin-bottom: 0.75rem;
}

.page-about__hero-desc {
  font-size: 1rem;
  line-height: 1.7;
  color: var(--about-text-muted);
  max-width: 600px;
}

/* ---- 通用章节 ---- */
.page-about__section {
  padding: 2.5rem 0;
  border-top: 1px solid var(--about-border);
}

.page-about__section:first-of-type {
  border-top: none;
}

.page-about__section-header {
  margin-bottom: 1.5rem;
}

.page-about__section-title {
  font-family: var(--about-font-heading);
  font-size: 1.6rem;
  font-weight: 700;
  margin: 0.25rem 0;
  color: var(--about-text);
}

/* --- section-number 复用 --- */
.section-number {
  display: flex;
  align-items: baseline;
  gap: 0.5rem;
}

.section-number .num {
  font-family: var(--about-font-heading);
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--about-accent);
  line-height: 1;
}

.section-number__label {
  font-family: var(--about-font-heading);
  font-size: 0.8rem;
  color: var(--about-text-muted);
  writing-mode: vertical-rl;
  text-orientation: mixed;
  letter-spacing: 0.1em;
}

/* ---- 品牌理念卡片 ---- */
.page-about__philosophy-grid {
  display: flex;
  flex-direction: column;
  gap: var(--about-gap);
}

.page-about__phil-card {
  background: var(--about-surface);
  border: 1px solid var(--about-border);
  border-radius: var(--about-radius);
  padding: 1.25rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
  transition: transform var(--about-transition), box-shadow var(--about-transition);
}

.page-about__phil-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.45);
}

/* ---- 服务范围 ---- */
.page-about__services-row {
  display: flex;
  flex-direction: column;
  gap: var(--about-gap);
}

.page-about__service-item {
  background: var(--about-surface);
  border-left: 3px solid var(--about-accent);
  border-radius: var(--about-radius);
  padding: 1.25rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}

.page-about__service-heading {
  font-family: var(--about-font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--about-accent);
  margin-bottom: 0.5rem;
}

.page-about__service-item p {
  color: var(--about-text-muted);
  line-height: 1.7;
  margin-bottom: 1rem;
}

/* ---- 图片容器 ---- */
.page-about__img-wrap {
  margin: 1.5rem 0;
  border-radius: var(--about-radius);
  overflow: hidden;
  background: var(--about-surface);
  border: 1px solid var(--about-border);
}

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

.page-about__img-wrap--flow {
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.page-about__img-wrap--landmark {
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

/* ---- 用户权益 ---- */
.page-about__benefits-wrapper {
  display: flex;
  flex-direction: column;
  gap: var(--about-gap);
  margin-bottom: 1.5rem;
}

.page-about__benefits-text {
  background: var(--about-surface);
  border: 1px solid var(--about-border);
  border-radius: var(--about-radius);
  padding: 1.25rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}

/* details 展开交互 */
.page-about__details {
  border: 1px solid var(--about-border);
  border-radius: var(--about-radius);
  background: var(--about-surface);
  margin-top: 1rem;
  overflow: hidden;
}

.page-about__details-summary {
  font-family: var(--about-font-heading);
  font-weight: 700;
  font-size: 1rem;
  color: var(--about-accent);
  padding: 0.75rem 1rem;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: background var(--about-transition);
}

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

.page-about__details-summary::before {
  content: '▶';
  font-size: 0.75rem;
  transition: transform var(--about-transition);
}

.page-about__details[open] .page-about__details-summary::before {
  transform: rotate(90deg);
}

.page-about__details-summary:hover {
  background: rgba(212, 175, 55, 0.08);
}

.page-about__details-content {
  padding: 0 1rem 1rem 1rem;
  color: var(--about-text-muted);
  line-height: 1.7;
}

/* ---- 备案与合规 ---- */
.page-about__compliance-grid {
  display: flex;
  flex-direction: column;
  gap: var(--about-gap);
}

.page-about__compliance-item {
  background: var(--about-surface);
  border: 1px solid var(--about-border);
  border-radius: var(--about-radius);
  padding: 1.25rem;
  box-shadow: 0 2px 12px rgba(0,0,0,0.3);
}

.page-about__trust-statement {
  margin-top: 1.5rem;
  font-size: 0.9rem;
  color: var(--about-text-muted);
  text-align: center;
  border-top: 1px solid var(--about-border);
  padding-top: 1rem;
}

/* ---- 面包屑 ---- */
.page-about__breadcrumb {
  font-size: 0.85rem;
  color: var(--about-text-muted);
  padding: 0.75rem 0 1rem 0;
  display: flex;
  gap: 0.4rem;
  align-items: center;
  flex-wrap: wrap;
}

.page-about__breadcrumb a {
  color: var(--about-accent);
  text-decoration: none;
  transition: color var(--about-transition);
}

.page-about__breadcrumb a:hover {
  color: var(--about-text);
  text-decoration: underline;
}

.page-about__breadcrumb span[aria-current="page"] {
  color: var(--about-text);
  font-weight: 600;
}

/* ---- 共享类微调 ---- */
.text-secondary {
  color: var(--about-text-muted);
  font-size: 0.95rem;
}

.btn {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  background: transparent;
  border: 1px solid var(--about-border);
  border-radius: var(--about-radius);
  color: var(--about-text);
  font-family: var(--about-font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  text-decoration: none;
  transition: all var(--about-transition);
  cursor: pointer;
}

.btn:hover {
  background: rgba(212, 175, 55, 0.1);
  border-color: var(--about-accent);
  color: var(--about-accent);
}

.btn-accent {
  background: var(--about-accent);
  border-color: var(--about-accent);
  color: #0B1A3A;
}

.btn-accent:hover {
  background: transparent;
  color: var(--about-accent);
}

/* ---- 响应式: 桌面版 ---- */
@media (min-width: 768px) {
  .page-about__container {
    padding: 0 2rem;
  }

  .page-about__hero {
    flex-direction: row;
    min-height: 70vh;
    padding: 3rem 0;
  }

  .page-about__hero-left {
    flex: 1 1 50%;
    padding-right: 2rem;
  }

  .page-about__hero-right {
    flex: 1 1 50%;
    min-height: 400px;
  }

  .page-about__hero-title {
    font-size: 3rem;
  }

  .page-about__hero-subtitle {
    font-size: 1.3rem;
  }

  .section-number .num {
    font-size: 3.5rem;
  }

  .page-about__section-title {
    font-size: 2rem;
  }

  .page-about__philosophy-grid {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .page-about__phil-card {
    flex: 1 1 calc(33.333% - var(--about-gap));
    min-width: 200px;
  }

  .page-about__services-row {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .page-about__service-item {
    flex: 1 1 calc(33.333% - var(--about-gap));
    min-width: 220px;
  }

  .page-about__benefits-wrapper {
    flex-direction: row;
  }

  .page-about__benefits-text {
    flex: 1;
  }

  .page-about__compliance-grid {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: flex-start;
  }

  .page-about__compliance-item {
    flex: 1 1 calc(50% - var(--about-gap) * 0.5);
    min-width: 240px;
  }

  .page-about__img-wrap--flow {
    max-width: 600px;
  }

  .page-about__img-wrap--landmark {
    max-width: 400px;
    flex: 0 0 auto;
  }
}

@media (min-width: 1024px) {
  .page-about__container {
    padding: 0 3rem;
  }

  .page-about__hero-title {
    font-size: 3.5rem;
  }

  .page-about__hero-right {
    min-height: 500px;
  }
}

/* ---- data-reveal 入场辅助（无JS也可见） ---- */
[data-reveal] {
  opacity: 1;
  transition: opacity 0.6s ease;
}
</PAGE_CSS>