/* ===== 平台服务页面专属样式 .page-products ===== */
.page-products {
  --card-primary-bg: #1B5E20;
  --card-secondary-bg: #6A1B2A;
  --card-text-light: #FFFFFF;
  --card-number-color: rgba(255, 255, 255, 0.15);
  --card-number-back-color: rgba(255, 255, 255, 0.08);
  --card-shadow: 0 8px 28px rgba(0, 0, 0, 0.18);
  --card-shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.28);
  --card-radius: var(--radius-lg, 16px);
  --flipper-height: 360px;
  --grid-gap: 24px;
  --intro-bg: #2E7D32;

  display: block;
  width: 100%;
  max-width: 100%;
  background-color: var(--color-bg-light, #F5F5F5);
  font-family: var(--font-body, 'Inter', sans-serif);
  color: var(--color-text, #212121);
  line-height: 1.6;
}

/* 面包屑 */
.page-products .breadcrumb {
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding: 16px 20px 0;
  font-size: 0.875rem;
  color: var(--color-text-secondary, #616161);
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.page-products .breadcrumb a {
  color: var(--color-primary, #2E7D32);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition-fast, 150ms ease);
}
.page-products .breadcrumb a:hover,
.page-products .breadcrumb a:focus-visible {
  color: var(--color-primary-dark, #1B5E20);
  text-decoration: underline;
}
.page-products .breadcrumb-sep {
  color: var(--color-border, #BDBDBD);
  user-select: none;
}
.page-products .breadcrumb-current {
  color: var(--color-text-secondary, #616161);
  font-weight: 400;
}

/* 页面标题区 */
.page-products .page-intro {
  background: linear-gradient(135deg, var(--intro-bg, #2E7D32) 0%, var(--card-primary-bg, #1B5E20) 100%);
  color: var(--card-text-light, #FFFFFF);
  padding: 40px 20px;
  margin-top: 0;
  position: relative;
  overflow: hidden;
}
.page-products .intro-text {
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 4px;
  position: relative;
  z-index: 2;
}
.page-products .rotated-note {
  font-family: var(--font-heading, 'Archivo Black', sans-serif);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  position: absolute;
  right: 0;
  top: 8px;
  opacity: 0.5;
  color: var(--color-secondary, #FFC107);
  pointer-events: none;
  user-select: none;
}
.page-products .intro-heading {
  font-family: var(--font-heading, 'Archivo Black', sans-serif);
  font-size: 2.5rem;
  font-weight: 900;
  margin: 0;
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--card-text-light, #FFFFFF);
}
.page-products .intro-desc {
  font-size: 1.125rem;
  margin: 4px 0 0;
  opacity: 0.85;
  font-weight: 400;
  max-width: 480px;
}

/* 首屏总览图 */
.page-products .hero-figure {
  margin: 0;
  padding: 0;
  line-height: 0;
  background: var(--color-bg-dark, #0D1B2A);
}
.page-products .hero-img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 1200 / 400;
}

/* 服务卡片网格 */
.page-products .services-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--grid-gap, 24px);
  max-width: var(--max-width, 1200px);
  margin: 0 auto;
  padding: 40px 20px 48px;
}

/* 卡片基础 */
.page-products .service-card {
  border-radius: var(--card-radius, 16px);
  overflow: hidden;
  box-shadow: var(--shadow-md, 0 4px 12px rgba(0,0,0,0.15));
  background: var(--card-text-light, #FFFFFF);
  transition: box-shadow var(--transition-base, 300ms ease), transform var(--transition-base, 300ms ease);
  display: flex;
  flex-direction: column;
}
.page-products .service-card:hover {
  box-shadow: var(--card-shadow-hover, 0 12px 40px rgba(0,0,0,0.28));
  transform: translateY(-4px);
}

/* 卡片交替背景色 — 深蓝绿 & 酒红 */
.page-products .service-card:nth-child(1) .card-face,
.page-products .service-card:nth-child(3) .card-face {
  background: var(--card-primary-bg, #1B5E20);
}
.page-products .service-card:nth-child(2) .card-face,
.page-products .service-card:nth-child(4) .card-face {
  background: var(--card-secondary-bg, #6A1B2A);
}

/* 翻转容器 */
.page-products .card-flipper {
  perspective: 1200px;
  min-height: var(--flipper-height, 360px);
  position: relative;
  transform-style: preserve-3d;
  transition: transform var(--transition-slow, 500ms ease);
}
.page-products .service-card:hover .card-flipper {
  transform: rotateY(180deg);
}

/* 正反面通用 */
.page-products .card-face {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--card-radius, 16px) var(--card-radius, 16px) 0 0;
  display: flex;
  flex-direction: column;
  padding: 28px 24px 24px;
  box-sizing: border-box;
  overflow: hidden;
}

/* 正面 */
.page-products .card-front {
  z-index: 2;
  transform: rotateY(0deg);
  color: var(--card-text-light, #FFFFFF);
}
.page-products .card-number {
  font-family: var(--font-heading, 'Archivo Black', sans-serif);
  font-size: 4rem;
  font-weight: 900;
  line-height: 1;
  color: var(--card-number-color, rgba(255,255,255,0.15));
  position: absolute;
  top: 8px;
  right: 16px;
  pointer-events: none;
  user-select: none;
}
.page-products .card-title {
  font-family: var(--font-heading, 'Archivo Black', sans-serif);
  font-size: 1.5rem;
  font-weight: 900;
  margin: 0 0 8px;
  color: var(--card-text-light, #FFFFFF);
  position: relative;
  z-index: 1;
}
.page-products .card-img-wrap {
  margin-top: auto;
  border-radius: var(--radius-md, 8px);
  overflow: hidden;
  line-height: 0;
  flex-shrink: 0;
}
.page-products .card-img-wrap img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 400 / 250;
  border-radius: var(--radius-md, 8px);
}

/* 反面 */
.page-products .card-back {
  transform: rotateY(180deg);
  background: inherit;
  color: var(--card-text-light, #FFFFFF);
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 32px 24px;
}
.page-products .card-number-back {
  font-family: var(--font-heading, 'Archivo Black', sans-serif);
  font-size: 5rem;
  font-weight: 900;
  line-height: 1;
  color: var(--card-number-back-color, rgba(255,255,255,0.08));
  position: absolute;
  bottom: 8px;
  right: 16px;
  pointer-events: none;
  user-select: none;
}
.page-products .card-brief {
  font-size: 1rem;
  line-height: 1.6;
  max-width: 320px;
  margin: 0;
  font-weight: 400;
  opacity: 0.95;
}

/* 展开详情 (details) */
.page-products .card-expand {
  background: var(--card-text-light, #FFFFFF);
  border-radius: 0 0 var(--card-radius, 16px) var(--card-radius, 16px);
  overflow: hidden;
}
.page-products .card-expand summary {
  display: block;
  cursor: pointer;
  padding: 14px 24px;
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-primary, #2E7D32);
  background: var(--color-bg-light, #F5F5F5);
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  transition: background var(--transition-fast, 150ms ease), color var(--transition-fast, 150ms ease);
  user-select: none;
  position: relative;
}
.page-products .card-expand summary::after {
  content: "＋";
  display: inline-block;
  margin-left: 8px;
  font-size: 1rem;
  font-weight: 700;
  transition: transform var(--transition-fast, 150ms ease);
}
.page-products .card-expand[open] summary::after {
  content: "−";
  transform: rotate(180deg);
}
.page-products .card-expand summary:hover,
.page-products .card-expand summary:focus-visible {
  background: var(--color-primary, #2E7D32);
  color: var(--card-text-light, #FFFFFF);
}
.page-products .card-expand summary::-webkit-details-marker {
  display: none;
}
.page-products .card-expand summary::marker {
  display: none;
  content: "";
}
.page-products .expand-body {
  padding: 20px 24px 24px;
  font-size: 0.95rem;
  line-height: 1.7;
  color: var(--color-text, #212121);
  border-top: 1px solid var(--color-border, #BDBDBD);
}
.page-products .expand-body p {
  margin: 0 0 16px;
}
.page-products .expand-body .btn {
  display: inline-block;
  padding: 10px 20px;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-md, 8px);
  text-decoration: none;
  transition: background var(--transition-fast, 150ms ease), color var(--transition-fast, 150ms ease);
}
.page-products .expand-body .btn-outline {
  background: transparent;
  border: 2px solid var(--color-primary, #2E7D32);
  color: var(--color-primary, #2E7D32);
}
.page-products .expand-body .btn-outline:hover,
.page-products .expand-body .btn-outline:focus-visible {
  background: var(--color-primary, #2E7D32);
  color: var(--card-text-light, #FFFFFF);
}
.page-products .expand-body .btn-secondary {
  background: var(--color-secondary, #FFC107);
  color: var(--color-text, #212121);
  border: 2px solid transparent;
}
.page-products .expand-body .btn-secondary:hover,
.page-products .expand-body .btn-secondary:focus-visible {
  background: var(--color-secondary-dark, #FF8F00);
  color: var(--color-text, #212121);
}
.page-products .expand-body .help-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}
.page-products .expand-body .help-links .btn {
  flex: 0 1 auto;
}

/* 底部相关链接区 */
.page-products .related-links {
  background: var(--color-accent, #1A237E);
  color: var(--card-text-light, #FFFFFF);
  padding: 48px 20px;
  margin-top: 0;
}
.page-products .related-heading {
  font-family: var(--font-heading, 'Archivo Black', sans-serif);
  font-size: 1.5rem;
  font-weight: 900;
  margin: 0 0 20px;
  max-width: var(--max-width, 1200px);
  margin-left: auto;
  margin-right: auto;
  padding: 0;
}
.page-products .related-list {
  list-style: none;
  margin: 0 auto;
  padding: 0;
  max-width: var(--max-width, 1200px);
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.page-products .related-list li {
  margin: 0;
  padding: 0;
}
.page-products .related-list a {
  color: var(--color-secondary, #FFC107);
  text-decoration: none;
  font-size: 1rem;
  font-weight: 500;
  transition: color var(--transition-fast, 150ms ease), padding-left var(--transition-fast, 150ms ease);
  display: inline-block;
}
.page-products .related-list a:hover,
.page-products .related-list a:focus-visible {
  color: var(--card-text-light, #FFFFFF);
  padding-left: 8px;
  text-decoration: underline;
}
.page-products .related-note {
  max-width: var(--max-width, 1200px);
  margin: 28px auto 0;
  font-size: 0.9rem;
  opacity: 0.7;
  line-height: 1.6;
  padding: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 20px;
}

/* ===== 响应式：桌面端 ≥ 768px ===== */
@media (min-width: 768px) {
  .page-products .services-grid {
    grid-template-columns: repeat(4, 1fr);
    padding: 48px 20px 56px;
  }

  /* 非对称排列 */
  .page-products .service-card:nth-child(1) {
    grid-column: 1 / 4;
  }
  .page-products .service-card:nth-child(2) {
    grid-column: 4 / 5;
  }
  .page-products .service-card:nth-child(3) {
    grid-column: 2 / 5;
  }
  .page-products .service-card:nth-child(4) {
    grid-column: 1 / 2;
  }

  .page-products .intro-heading {
    font-size: 3.25rem;
  }
  .page-products .intro-desc {
    font-size: 1.25rem;
  }
  .page-products .page-intro {
    padding: 56px 40px;
  }
  .page-products .rotated-note {
    font-size: 0.875rem;
    right: 40px;
    top: 16px;
  }
  .page-products .card-number {
    font-size: 5rem;
  }
  .page-products .card-title {
    font-size: 1.75rem;
  }
  .page-products .card-face {
    padding: 32px 28px 28px;
  }
  .page-products .card-back {
    padding: 40px 28px;
  }
  .page-products .card-brief {
    font-size: 1.05rem;
  }
  .page-products .related-links {
    padding: 56px 40px;
  }
  .page-products .related-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 24px;
  }
  .page-products .related-list li {
    flex: 0 0 auto;
  }
}

/* ===== 桌面端大屏 ≥ 1024px ===== */
@media (min-width: 1024px) {
  .page-products .services-grid {
    gap: 28px;
    padding: 56px 20px 64px;
  }
  .page-products .intro-heading {
    font-size: 3.75rem;
  }
  .page-products .page-intro {
    padding: 64px 40px;
  }
  .page-products .rotated-note {
    font-size: 1rem;
    right: 60px;
  }
  .page-products .card-number {
    font-size: 5.5rem;
  }
  .page-products .card-title {
    font-size: 2rem;
  }
  .page-products .card-flipper {
    min-height: 380px;
  }
  .page-products .related-heading {
    font-size: 1.75rem;
  }
}

/* ===== 桌面端宽屏 ≥ 1200px ===== */
@media (min-width: 1200px) {
  .page-products .services-grid {
    gap: 32px;
    padding: 64px 20px 72px;
  }
  .page-products .card-flipper {
    min-height: 400px;
  }
  .page-products .card-number {
    font-size: 6rem;
  }
  .page-products .card-number-back {
    font-size: 6rem;
  }
  .page-products .page-intro {
    padding: 72px 40px;
  }
  .page-products .intro-heading {
    font-size: 4.25rem;
  }
}

/* ===== 极窄屏安全 ===== */
@media (max-width: 380px) {
  .page-products .intro-heading {
    font-size: 1.75rem;
  }
  .page-products .card-face {
    padding: 20px 16px 16px;
  }
  .page-products .card-number {
    font-size: 3rem;
  }
  .page-products .card-title {
    font-size: 1.25rem;
  }
  .page-products .card-flipper {
    min-height: 300px;
  }
  .page-products .card-expand summary {
    padding: 12px 16px;
    font-size: 0.85rem;
  }
  .page-products .expand-body {
    padding: 16px;
  }
}

/* 确保卡片内容不横向溢出 */
.page-products .service-card,
.page-products .card-face,
.page-products .card-expand,
.page-products .expand-body {
  word-wrap: break-word;
  overflow-wrap: break-word;
}
.page-products img {
  max-width: 100%;
  height: auto;
}
.page-products .card-img-wrap img {
  aspect-ratio: 400 / 250;
  object-fit: cover;
}

/* 打印样式调整 */
@media print {
  .page-products .card-flipper {
    transform: none !important;
  }
  .page-products .card-back {
    display: none;
  }
  .page-products .card-expand summary {
    display: none;
  }
  .page-products .card-expand .expand-body {
    display: block !important;
  }
}