/* ===== 产品服务页面专属样式 ===== */
.page-products {
  --card-border-red: var(--color-primary-red);
  --card-border-blue: var(--color-primary-blue);
  --card-border-gold: var(--color-gold);
  --card-border-dark: var(--color-bg-dark);
  --dot-size: 18px;
  --rail-width: 5px;
  --timeline-offset: 32px;
  display: block;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1rem 3rem;
  background: var(--color-bg-dark);
  color: var(--color-text-light);
}

/* 面包屑 */
.page-products .breadcrumb {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-gold);
  margin-bottom: 2rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--color-divider);
}
.page-products .breadcrumb a {
  color: var(--color-gold);
  text-decoration: none;
  transition: color 0.2s;
}
.page-products .breadcrumb a:hover,
.page-products .breadcrumb a:focus {
  color: var(--color-hover-gold);
}
.page-products .breadcrumb-sep {
  color: var(--color-divider);
  font-weight: 700;
}
.page-products .breadcrumb [aria-current="page"] {
  color: var(--color-text-light);
  font-weight: 600;
}

/* 首屏 */
.page-products .products-hero {
  display: block;
  margin-bottom: 3rem;
}
.page-products .hero-inner {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.page-products .hero-inner h1 {
  font-family: var(--font-headings);
  font-size: 3rem;
  line-height: 1.05;
  text-transform: uppercase;
  color: var(--color-text-light);
  margin: 0;
  letter-spacing: 0.04em;
}
.page-products .hero-sub {
  font-family: var(--font-headings);
  font-size: 1.25rem;
  color: var(--color-gold);
  margin: 0;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.page-products .hero-desc {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-light);
  max-width: 720px;
  margin: 0;
}
.page-products .hero-media {
  width: 100%;
  margin-top: 0.75rem;
  border: var(--border-thick) solid var(--color-primary-blue);
  box-shadow: var(--shadow-strong);
}
.page-products .hero-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* 时间轴容器 */
.page-products .services-timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 3rem;
  padding-left: var(--timeline-offset);
  margin-bottom: 3rem;
}
.page-products .timeline-rail {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 14px;
  width: var(--rail-width);
  background: var(--color-divider);
  border-radius: 4px;
  z-index: 0;
}

/* 每个服务卡片 */
.page-products .service-card {
  position: relative;
  z-index: 1;
}
.page-products .card-dot {
  position: absolute;
  left: calc(-1 * var(--timeline-offset) + 6px);
  top: 2rem;
  width: var(--dot-size);
  height: var(--dot-size);
  background: var(--color-gold);
  border: 3px solid var(--color-bg-dark);
  border-radius: 50%;
  z-index: 2;
  box-shadow: 0 0 0 2px var(--color-gold);
  transition: transform 0.25s, box-shadow 0.25s;
}
.page-products .service-card:hover .card-dot,
.page-products .service-card:focus-within .card-dot {
  transform: scale(1.25);
  box-shadow: 0 0 0 4px var(--color-gold), 0 0 14px var(--color-gold);
}

/* 卡片内部容器 */
.page-products .card-inner {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  background: var(--color-bg-dark);
  border: var(--border-thick) solid var(--color-primary-blue);
  box-shadow: var(--shadow-strong);
  padding: 1.5rem;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.page-products .service-card:nth-child(1) .card-inner {
  border-color: var(--card-border-red);
}
.page-products .service-card:nth-child(2) .card-inner {
  border-color: var(--card-border-blue);
}
.page-products .service-card:nth-child(3) .card-inner {
  border-color: var(--card-border-gold);
}
.page-products .service-card:nth-child(4) .card-inner {
  border-color: var(--card-border-dark);
  border-width: 5px;
}
.page-products .service-card:nth-child(1):hover .card-inner,
.page-products .service-card:nth-child(1):focus-within .card-inner {
  box-shadow: 0 0 0 2px var(--card-border-red), var(--shadow-strong);
}
.page-products .service-card:nth-child(2):hover .card-inner,
.page-products .service-card:nth-child(2):focus-within .card-inner {
  box-shadow: 0 0 0 2px var(--card-border-blue), var(--shadow-strong);
}
.page-products .service-card:nth-child(3):hover .card-inner,
.page-products .service-card:nth-child(3):focus-within .card-inner {
  box-shadow: 0 0 0 2px var(--card-border-gold), var(--shadow-strong);
}
.page-products .service-card:nth-child(4):hover .card-inner,
.page-products .service-card:nth-child(4):focus-within .card-inner {
  box-shadow: 0 0 0 2px var(--color-gold), var(--shadow-strong);
}

/* 文字区 */
.page-products .card-text {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex: 1 1 50%;
}
.page-products .card-number {
  font-family: var(--font-numbers);
  font-size: 3.25rem;
  line-height: 1;
  color: var(--color-primary-red);
  letter-spacing: -0.02em;
  display: block;
}
.page-products .service-card:nth-child(1) .card-number {
  color: var(--color-primary-red);
  font-size: 4rem;
}
.page-products .service-card:nth-child(2) .card-number {
  color: var(--color-primary-blue);
}
.page-products .service-card:nth-child(3) .card-number {
  color: var(--color-gold);
}
.page-products .service-card:nth-child(4) .card-number {
  color: var(--color-gold);
}
.page-products .card-text h2 {
  font-family: var(--font-headings);
  font-size: 1.75rem;
  line-height: 1.15;
  text-transform: uppercase;
  color: var(--color-text-light);
  margin: 0;
  letter-spacing: 0.02em;
}
.page-products .card-text > p {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--color-light);
  margin: 0;
}

/* 特点列表 */
.page-products .feature-list {
  list-style: none;
  padding: 0;
  margin: 0.25rem 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
}
.page-products .feature-list li {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-gold);
  position: relative;
  padding-left: 1.1rem;
}
.page-products .feature-list li::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--color-primary-red);
  font-weight: 700;
}

/* 展开详情 */
.page-products .card-details {
  margin-top: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  color: var(--color-light);
}
.page-products .card-details summary {
  cursor: pointer;
  color: var(--color-gold);
  font-weight: 600;
  padding: 0.25rem 0;
  transition: color 0.2s;
  user-select: none;
}
.page-products .card-details summary:hover,
.page-products .card-details summary:focus {
  color: var(--color-hover-gold);
}
.page-products .card-details p {
  margin: 0.5rem 0 0;
  padding: 0.75rem 1rem;
  background: rgba(29,53,87,0.35);
  border-left: 3px solid var(--color-gold);
  border-radius: 0 4px 4px 0;
  line-height: 1.6;
}

/* 图片区 */
.page-products .card-media {
  flex: 1 1 45%;
  border: 3px solid var(--color-divider);
  box-shadow: 0 4px 12px rgba(0,0,0,0.3);
  transition: border-color 0.3s;
}
.page-products .service-card:hover .card-media,
.page-products .service-card:focus-within .card-media {
  border-color: var(--color-gold);
}
.page-products .card-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

/* 信任声明 */
.page-products .trust-statement {
  display: block;
  margin-bottom: 2.5rem;
  border-top: 4px solid var(--color-divider);
  border-bottom: 4px solid var(--color-divider);
  padding: 1.5rem 0;
}
.page-products .trust-inner {
  max-width: 800px;
  margin: 0 auto;
}
.page-products .trust-statement p {
  font-family: var(--font-body);
  font-size: 1.1rem;
  line-height: 1.7;
  color: var(--color-gold);
  text-align: center;
  margin: 0;
  font-weight: 500;
}

/* 内部链接 */
.page-products .internal-links {
  display: block;
  padding: 1.5rem 0 0.5rem;
  border-top: 2px solid var(--color-divider);
}
.page-products .links-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}
.page-products .links-inner .btn {
  text-decoration: none;
  padding: 0.6rem 1.6rem;
  font-family: var(--font-headings);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  border: 2px solid var(--color-primary-blue);
  background: transparent;
  color: var(--color-text-light);
  transition: background 0.25s, color 0.25s, transform 0.2s;
  cursor: pointer;
  display: inline-block;
}
.page-products .links-inner .btn:hover,
.page-products .links-inner .btn:focus {
  background: var(--color-primary-blue);
  color: var(--color-text-light);
  transform: scale(1.04);
}

/* ===== 桌面端响应式 ===== */
@media (min-width: 720px) {
  .page-products {
    padding: 2rem 2rem 4rem;
  }
  .page-products .hero-inner h1 {
    font-size: 4rem;
  }
  .page-products .hero-sub {
    font-size: 1.5rem;
  }
  .page-products .hero-desc {
    font-size: 1.1rem;
  }
  .page-products .services-timeline {
    padding-left: 48px;
    gap: 4rem;
  }
  .page-products .timeline-rail {
    left: 20px;
  }
  .page-products .card-dot {
    left: calc(-48px + 10px);
    top: 3rem;
    width: 22px;
    height: 22px;
  }
  .page-products .card-inner {
    flex-direction: row;
    align-items: flex-start;
    padding: 2rem;
  }
  .page-products .card-text {
    flex: 1 1 52%;
  }
  .page-products .card-media {
    flex: 1 1 44%;
    max-width: 520px;
  }
  .page-products .service-card:nth-child(even) .card-inner {
    flex-direction: row-reverse;
  }
  .page-products .card-number {
    font-size: 4rem;
  }
  .page-products .service-card:nth-child(1) .card-number {
    font-size: 5rem;
  }
  .page-products .card-text h2 {
    font-size: 2rem;
  }
  .page-products .trust-statement p {
    font-size: 1.2rem;
  }
  .page-products .links-inner {
    gap: 1.5rem;
  }
}

@media (min-width: 1024px) {
  .page-products {
    padding: 2.5rem 3rem 5rem;
  }
  .page-products .hero-inner h1 {
    font-size: 5rem;
  }
  .page-products .services-timeline {
    padding-left: 60px;
    gap: 5rem;
  }
  .page-products .timeline-rail {
    left: 26px;
    width: 6px;
  }
  .page-products .card-dot {
    left: calc(-60px + 14px);
    width: 26px;
    height: 26px;
  }
  .page-products .card-inner {
    padding: 2.5rem 3rem;
  }
  .page-products .card-number {
    font-size: 4.5rem;
  }
  .page-products .service-card:nth-child(1) .card-number {
    font-size: 6rem;
  }
  .page-products .card-text h2 {
    font-size: 2.25rem;
  }
}