/* ============================================================
   page-about 品牌故事 – 页面专属样式
   作用域限定：仅影响 .page-about 内部元素
   移动端优先，桌面增强
   ============================================================ */
.page-about {
  --about-gold: #D4AF37;
  --about-neon: #00FFCC;
  --about-deep: #0B3D2C;
  --about-indigo: #2C1B4D;
  --about-wine: #8B2252;
  --about-light: #E0E0E0;
  --about-white: #FFFFFF;
  --about-dark: #222222;
  --about-shadow: 0 8px 24px rgba(0,0,0,0.45);
  --about-transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font-head: 'Oswald','Impact','Arial Black',sans-serif;
  --font-body: 'Merriweather','Georgia','Times New Roman',serif;
  --font-mono: 'Courier New','Consolas',monospace;
}

/* ---------- 全局重置与排版 ---------- */
.page-about {
  background: var(--about-deep);
  color: var(--about-light);
  font-family: var(--font-body);
  line-height: 1.7;
  padding: 0 16px 40px;
  min-height: 100vh;
}
.page-about .breadcrumb {
  font-family: var(--font-head);
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  padding: 16px 0 12px;
  color: rgba(255,255,255,0.55);
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
}
.page-about .breadcrumb a {
  color: var(--about-gold);
  text-decoration: none;
  transition: color var(--about-transition);
}
.page-about .breadcrumb a:hover,
.page-about .breadcrumb a:focus {
  color: var(--about-white);
  outline: 2px dashed var(--about-gold);
  outline-offset: 2px;
}
.page-about .breadcrumb-sep {
  margin: 0 2px;
  color: rgba(255,255,255,0.3);
}
.page-about .breadcrumb [aria-current="page"] {
  color: var(--about-light);
  font-weight: 500;
}

.page-about .section-title {
  font-family: var(--font-head);
  font-size: clamp(1.8rem, 4.5vw, 3rem);
  font-weight: 700;
  color: var(--about-white);
  letter-spacing: 0.02em;
  margin: 0 0 8px;
  line-height: 1.15;
}
.page-about .section-desc {
  font-family: var(--font-body);
  font-size: 1rem;
  color: rgba(255,255,255,0.6);
  margin-bottom: 32px;
  font-style: italic;
}

/* ---------- 地图图例编号 ---------- */
.page-about .section-label {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.page-about .section-number {
  font-family: var(--font-head);
  font-size: 2.2rem;
  font-weight: 700;
  color: var(--about-neon);
  line-height: 1;
  letter-spacing: -0.02em;
  text-shadow: 0 0 8px rgba(0,255,204,0.25);
}
.page-about .section-label-text {
  font-family: var(--font-head);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: rgba(255,255,255,0.3);
  border-left: 2px solid var(--about-gold);
  padding-left: 10px;
}

/* ---------- 首屏 hero ---------- */
.page-about .hero-section {
  position: relative;
  margin: 0 -16px 0;
  padding: 0;
  overflow: hidden;
  min-height: 360px;
  display: flex;
  align-items: center;
}
.page-about .hero-bg-wrap {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-about .hero-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  filter: saturate(0.7) brightness(0.5);
}
.page-about .hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11,61,44,0.85) 20%, rgba(44,27,77,0.6) 80%);
  z-index: 1;
}
.page-about .hero-content {
  position: relative;
  z-index: 2;
  padding: 60px 16px 50px;
  max-width: 780px;
}
.page-about .hero-title {
  font-family: var(--font-head);
  font-size: clamp(2.8rem, 7vw, 5rem);
  font-weight: 700;
  color: var(--about-white);
  letter-spacing: 0.04em;
  line-height: 1;
  margin: 0 0 8px;
  text-shadow: 0 4px 20px rgba(0,0,0,0.5);
}
.page-about .hero-subtitle {
  font-family: var(--font-head);
  font-size: clamp(1rem, 2.2vw, 1.4rem);
  color: var(--about-gold);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin: 0 0 12px;
}
.page-about .hero-desc {
  font-family: var(--font-body);
  font-size: 1.05rem;
  color: rgba(255,255,255,0.7);
  max-width: 560px;
  line-height: 1.6;
}

/* ---------- 品牌起源 ---------- */
.page-about .origin-section {
  padding: 56 0 48px;
  margin: 0 -16px;
  padding: 48px 16px;
  background: linear-gradient(170deg, var(--about-deep) 0%, var(--about-indigo) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 96%, 0 100%);
}
.page-about .origin-grid {
  display: flex;
  flex-direction: column;
  gap: 28px;
  max-width: 1100px;
  margin: 0 auto;
}
.page-about .origin-text p {
  font-size: 0.98rem;
  line-height: 1.8;
  color: var(--about-light);
  margin: 0 0 14px;
}
.page-about .origin-logo-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
}
.page-about .origin-logo {
  width: 150px;
  height: auto;
  border-radius: 50%;
  border: 3px solid var(--about-gold);
  box-shadow: 0 0 30px rgba(212,175,55,0.2);
  transition: transform var(--about-transition), box-shadow var(--about-transition);
}
.page-about .origin-logo:hover {
  transform: scale(1.04);
  box-shadow: 0 0 40px rgba(212,175,55,0.35);
}

/* ---------- 核心价值 ---------- */
.page-about .values-section {
  padding: 56px 16px 64px;
  margin: 0 -16px;
  background: linear-gradient(190deg, var(--about-indigo) 0%, var(--about-deep) 100%);
  clip-path: polygon(0 2%, 100% 0, 100% 98%, 0 100%);
}
.page-about .values-grid {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 1100px;
  margin: 0 auto;
}
.page-about .value-card {
  perspective: 1200px;
  cursor: pointer;
  outline: none;
  min-height: 240px;
}
.page-about .card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform var(--about-transition);
  transform-style: preserve-3d;
  border-radius: 8px;
  box-shadow: var(--about-shadow);
}
.page-about .value-card:hover .card-inner,
.page-about .value-card:focus-visible .card-inner {
  transform: rotateY(180deg);
}
.page-about .card-front,
.page-about .card-back {
  position: relative;
  backface-visibility: hidden;
  border-radius: 8px;
  padding: 28px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 240px;
  border: 1px solid rgba(255,255,255,0.06);
}
.page-about .card-front {
  background: linear-gradient(145deg, rgba(11,61,44,0.9), rgba(44,27,77,0.7));
  z-index: 2;
}
.page-about .card-back {
  position: absolute;
  inset: 0;
  background: linear-gradient(145deg, var(--about-indigo), rgba(11,61,44,0.95));
  transform: rotateY(180deg);
  z-index: 1;
  padding: 28px 20px;
}
.page-about .card-icon {
  display: block;
  width: 48px;
  height: 48px;
  margin-bottom: 14px;
  border: 2px solid var(--about-gold);
  border-radius: 50%;
  position: relative;
  background: rgba(212,175,55,0.08);
}
.page-about .card-icon-speed::after {
  content: '⚡';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--about-neon);
}
.page-about .card-icon-precision::after {
  content: '◎';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--about-gold);
}
.page-about .card-icon-open::after {
  content: '⇄';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--about-neon);
}
.page-about .card-title {
  font-family: var(--font-head);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--about-white);
  margin: 0 0 4px;
  letter-spacing: 0.04em;
}
.page-about .card-brief {
  font-family: var(--font-body);
  font-size: 0.85rem;
  color: rgba(255,255,255,0.55);
  font-style: italic;
}
.page-about .card-back-text {
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--about-light);
  text-align: center;
  margin: 0;
}

/* 特色卡片（中间）视觉突出 */
.page-about .value-card-featured .card-front {
  border-color: var(--about-gold);
  box-shadow: 0 0 20px rgba(212,175,55,0.12);
}

/* ---------- 发展历程 时间轴 ---------- */
.page-about .timeline-section {
  padding: 56px 16px 48px;
  margin: 0 -16px;
  background: var(--about-deep);
}
.page-about .timeline {
  max-width: 720px;
  margin: 0 auto;
  position: relative;
  padding-left: 20px;
}
.page-about .timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 12px;
  bottom: 12px;
  width: 2px;
  background: linear-gradient(to bottom, var(--about-gold), var(--about-neon), var(--about-gold));
  opacity: 0.5;
  border-radius: 1px;
}
.page-about .timeline-item {
  position: relative;
  padding-bottom: 28px;
}
.page-about .timeline-item:last-child {
  padding-bottom: 0;
}
.page-about .timeline-dot-wrap {
  position: absolute;
  left: -16px;
  top: 6px;
  display: flex;
  flex-direction: column;
  align-items: center;
  z-index: 1;
}
.page-about .timeline-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--about-gold);
  border: 3px solid var(--about-deep);
  box-shadow: 0 0 0 2px var(--about-gold), 0 4px 12px rgba(212,175,55,0.3);
  flex-shrink: 0;
  transition: transform var(--about-transition), box-shadow var(--about-transition);
}
.page-about .timeline-item:hover .timeline-dot {
  transform: scale(1.2);
  box-shadow: 0 0 0 3px var(--about-gold), 0 6px 20px rgba(212,175,55,0.45);
}
.page-about .timeline-details {
  display: block;
  margin-left: 24px;
}
.page-about .timeline-summary {
  font-family: var(--font-head);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--about-white);
  letter-spacing: 0.03em;
  padding: 8px 12px 8px 0;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: color var(--about-transition);
}
.page-about .timeline-summary::-webkit-details-marker {
  display: none;
}
.page-about .timeline-summary::before {
  content: '+';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 4px;
  background: rgba(212,175,55,0.12);
  color: var(--about-gold);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1rem;
  transition: background var(--about-transition), transform var(--about-transition);
  flex-shrink: 0;
}
.page-about .timeline-details[open] .timeline-summary::before {
  content: '−';
  background: var(--about-gold);
  color: var(--about-deep);
}
.page-about .timeline-summary:hover,
.page-about .timeline-summary:focus-visible {
  color: var(--about-gold);
  outline: 2px dashed var(--about-gold);
  outline-offset: 2px;
}
.page-about .timeline-body {
  padding: 8px 12px 8px 32px;
  font-size: 0.92rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.7);
  border-left: 1px solid rgba(212,175,55,0.2);
  margin-left: 10px;
}
.page-about .timeline-body p {
  margin: 0;
}

/* ---------- 服务承诺 ---------- */
.page-about .commitment-section {
  padding: 48px 16px 52px;
  margin: 0 -16px;
  background: linear-gradient(170deg, var(--about-indigo) 0%, var(--about-deep) 100%);
  clip-path: polygon(0 2%, 100% 0, 100% 100%, 0 98%);
}
.page-about .commitment-grid {
  display: flex;
  flex-direction: column;
  gap: 28px;
  max-width: 1100px;
  margin: 0 auto;
}
.page-about .commitment-list {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.page-about .commitment-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.96rem;
  line-height: 1.6;
  color: var(--about-light);
}
.page-about .commitment-marker {
  display: inline-flex;
  width: 10px;
  height: 10px;
  border-radius: 2px;
  background: var(--about-neon);
  margin-top: 8px;
  flex-shrink: 0;
  box-shadow: 0 0 8px rgba(0,255,204,0.3);
}
.page-about .commitment-image-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
}
.page-about .commitment-image {
  width: 100%;
  max-width: 300px;
  height: auto;
  border-radius: 6px;
  border: 1px solid rgba(0,255,204,0.15);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
  transition: transform var(--about-transition), box-shadow var(--about-transition);
}
.page-about .commitment-image:hover {
  transform: scale(1.02);
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
}

/* ---------- 内链区域 ---------- */
.page-about .connect-section {
  padding: 40px 0 20px;
  text-align: center;
}
.page-about .connect-title {
  margin-bottom: 20px;
  font-size: clamp(1.4rem, 3vw, 2rem);
}
.page-about .connect-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}
.page-about .btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 30px;
  font-family: var(--font-head);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: 4px;
  transition: background var(--about-transition), color var(--about-transition), border-color var(--about-transition), box-shadow var(--about-transition);
  cursor: pointer;
  border: 2px solid var(--about-gold);
  background: var(--about-gold);
  color: var(--about-deep);
  min-width: 140px;
}
.page-about .btn:hover,
.page-about .btn:focus-visible {
  background: transparent;
  color: var(--about-gold);
  box-shadow: 0 0 20px rgba(212,175,55,0.15);
  outline: 2px dashed var(--about-gold);
  outline-offset: 2px;
}
.page-about .btn-outline {
  background: transparent;
  color: var(--about-gold);
  border-color: rgba(212,175,55,0.4);
}
.page-about .btn-outline:hover,
.page-about .btn-outline:focus-visible {
  background: rgba(212,175,55,0.08);
  border-color: var(--about-gold);
  color: var(--about-gold);
}

/* ============================================================
   桌面端增强 (≥768px)
   ============================================================ */
@media (min-width: 768px) {
  .page-about {
    padding: 0 40px 60px;
  }
  .page-about .hero-section {
    margin: 0 -40px 0;
    min-height: 480px;
  }
  .page-about .hero-content {
    padding: 80px 40px 70px;
  }
  .page-about .origin-section {
    margin: 0 -40px;
    padding: 64px 40px;
    clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
  }
  .page-about .origin-grid {
    flex-direction: row;
    align-items: center;
    gap: 48px;
  }
  .page-about .origin-text {
    flex: 2;
  }
  .page-about .origin-logo-wrap {
    flex: 1;
  }
  .page-about .values-section {
    margin: 0 -40px;
    padding: 72px 40px 80px;
    clip-path: polygon(0 3%, 100% 0, 100% 95%, 0 100%);
  }
  .page-about .values-grid {
    flex-direction: row;
    gap: 24px;
  }
  .page-about .value-card {
    flex: 1;
    min-height: 300px;
  }
  .page-about .value-card-featured {
    flex: 1.3;
  }
  .page-about .card-front,
  .page-about .card-back {
    min-height: 300px;
    padding: 36px 28px;
  }
  .page-about .timeline-section {
    margin: 0 -40px;
    padding: 72px 40px 64px;
  }
  .page-about .timeline {
    padding-left: 40px;
  }
  .page-about .timeline::before {
    left: 16px;
  }
  .page-about .timeline-dot-wrap {
    left: -24px;
  }
  .page-about .timeline-dot {
    width: 20px;
    height: 20px;
  }
  .page-about .timeline-summary {
    font-size: 1.2rem;
    padding: 10px 16px 10px 0;
  }
  .page-about .timeline-body {
    padding: 12px 16px 12px 40px;
  }
  .page-about .commitment-section {
    margin: 0 -40px;
    padding: 64px 40px 68px;
    clip-path: polygon(0 3%, 100% 0, 100% 100%, 0 97%);
  }
  .page-about .commitment-grid {
    flex-direction: row;
    gap: 48px;
    align-items: center;
  }
  .page-about .commitment-text {
    flex: 1.5;
  }
  .page-about .commitment-image-wrap {
    flex: 1;
  }
  .page-about .commitment-list li {
    font-size: 1rem;
  }
  .page-about .connect-section {
    padding: 56px 0 32px;
  }
  .page-about .btn {
    padding: 14px 36px;
    font-size: 1rem;
    min-width: 180px;
  }
}

/* ---------- 宽屏微调 (≥1200px) ---------- */
@media (min-width: 1200px) {
  .page-about {
    padding: 0 60px 80px;
  }
  .page-about .hero-section {
    margin: 0 -60px 0;
    min-height: 520px;
  }
  .page-about .hero-content {
    padding: 100px 60px 80px;
    max-width: 860px;
  }
  .page-about .origin-section,
  .page-about .values-section,
  .page-about .timeline-section,
  .page-about .commitment-section {
    margin-left: -60px;
    margin-right: -60px;
    padding-left: 60px;
    padding-right: 60px;
  }
  .page-about .values-grid {
    gap: 32px;
  }
  .page-about .value-card {
    min-height: 340px;
  }
  .page-about .card-front,
  .page-about .card-back {
    min-height: 340px;
    padding: 44px 32px;
  }
  .page-about .timeline {
    max-width: 800px;
  }
}