/* ===== 页面专属：产品服务 ===== */
.page-products {
  --card-flip-height: 540px;
  --card-flip-duration: 0.6s;
}

.page-products .breadcrumb {
  padding: 1.5rem 0 0.5rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--color-light-gray, #B0B0B0);
}

.page-products .breadcrumb__separator {
  color: var(--color-gold, #FFD700);
  font-weight: 700;
  margin: 0 0.15rem;
}

.page-products .breadcrumb__current {
  color: var(--color-white, #FFFFFF);
  font-weight: 500;
}

.page-products__header {
  padding: 2.5rem 0 2rem;
  border-bottom: 2px solid rgba(255, 215, 0, 0.15);
  margin-bottom: 2.5rem;
}

.page-products__title {
  font-family: var(--font-heading, 'Poppins', system-ui, sans-serif);
  font-weight: 800;
  font-size: clamp(1.8rem, 4.5vw, 3rem);
  color: var(--color-white, #FFFFFF);
  margin: 0 0 0.8rem;
  letter-spacing: -0.01em;
  line-height: 1.15;
}

.page-products__subtitle {
  font-family: var(--font-body, 'Noto Sans SC', system-ui, sans-serif);
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: var(--color-light-gray, #B0B0B0);
  line-height: 1.7;
  max-width: 720px;
  margin: 0;
}

/* ===== 卡片网格 ===== */
.page-products__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-bottom: 3rem;
}

@media (min-width: 768px) {
  .page-products__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
  }
}

@media (min-width: 1024px) {
  .page-products__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
  }
}

/* ===== 翻转卡片 ===== */
.page-products .card-flip {
  perspective: 1200px;
  height: var(--card-flip-height, 540px);
  cursor: pointer;
  transition: transform var(--transition, 0.25s ease), box-shadow 0.35s ease;
  border-radius: var(--radius-lg, 20px);
}

.page-products .card-flip:hover {
  transform: scale(1.02);
  box-shadow: 0 20px 48px rgba(139, 0, 0, 0.25), 0 8px 16px rgba(0, 0, 0, 0.4);
}

.page-products .card-flip:focus-within {
  outline: 2px solid var(--color-gold, #FFD700);
  outline-offset: 4px;
}

.page-products .card-flip__inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform var(--card-flip-duration, 0.6s) cubic-bezier(0.23, 1, 0.32, 1);
  transform-style: preserve-3d;
  border-radius: var(--radius-lg, 20px);
}

.page-products .card-flip:hover .card-flip__inner,
.page-products .card-flip:focus-within .card-flip__inner {
  transform: rotateY(180deg);
}

@media (prefers-reduced-motion: reduce) {
  .page-products .card-flip__inner {
    transition: none;
  }
  .page-products .card-flip:hover .card-flip__inner,
  .page-products .card-flip:focus-within .card-flip__inner {
    transform: none;
  }
  .page-products .card-flip__back {
    opacity: 0;
    pointer-events: none;
  }
  .page-products .card-flip:hover .card-flip__back,
  .page-products .card-flip:focus-within .card-flip__back {
    opacity: 1;
    pointer-events: auto;
  }
}

/* 正面 & 背面 */
.page-products .card-flip__front,
.page-products .card-flip__back {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--radius-lg, 20px);
  padding: 2rem 1.5rem 1.8rem;
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
  overflow: hidden;
}

.page-products .card-flip__front {
  background: linear-gradient(145deg, var(--color-dark-panel, #1A1A1A) 0%, #1f1a1a 100%);
  border: 1px solid rgba(255, 215, 0, 0.08);
  align-items: center;
  text-align: center;
}

.page-products .card-flip__back {
  background: linear-gradient(135deg, var(--color-deep-red, #8B0000) 0%, #4a0000 100%);
  border: 1px solid var(--color-gold, #FFD700);
  transform: rotateY(180deg);
  align-items: flex-start;
  text-align: left;
  color: var(--color-white, #FFFFFF);
}

/* 正面元素 */
.page-products .card-flip__icon {
  color: var(--color-gold, #FFD700);
  margin-bottom: 1.2rem;
  flex-shrink: 0;
}

.page-products .card-flip__heading {
  font-family: var(--font-heading, 'Poppins', system-ui, sans-serif);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--color-white, #FFFFFF);
  margin: 0 0 0.5rem;
  letter-spacing: 0.01em;
}

.page-products .card-flip__desc {
  font-family: var(--font-body, 'Noto Sans SC', system-ui, sans-serif);
  font-size: 0.92rem;
  color: var(--color-light-gray, #B0B0B0);
  line-height: 1.6;
  margin: 0 0 1.2rem;
  max-width: 280px;
}

.page-products .card-flip__img-wrap {
  width: 100%;
  border-radius: var(--radius, 12px);
  overflow: hidden;
  flex-shrink: 0;
  margin-bottom: 0.8rem;
  background: rgba(0, 0, 0, 0.25);
}

.page-products .card-flip__img-wrap--portrait {
  max-width: 160px;
  margin-left: auto;
  margin-right: auto;
}

.page-products .card-flip__img-wrap--small {
  max-width: 100px;
  margin-left: auto;
  margin-right: auto;
}

.page-products .card-flip__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  object-position: center;
}

.page-products .card-flip__img--portrait {
  aspect-ratio: 1 / 2;
  object-fit: cover;
}

.page-products .card-flip__img--small {
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border-radius: 50%;
}

.page-products .card-flip__hint {
  font-family: var(--font-accent, 'Poppins', system-ui, sans-serif);
  font-size: 0.75rem;
  font-weight: 600;
  font-style: italic;
  color: var(--color-gold, #FFD700);
  opacity: 0.7;
  margin-top: auto;
  padding-top: 0.5rem;
  letter-spacing: 0.04em;
}

/* 背面元素 */
.page-products .card-flip__back-heading {
  font-family: var(--font-heading, 'Poppins', system-ui, sans-serif);
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-gold, #FFD700);
  margin: 0 0 1rem;
  border-bottom: 2px solid rgba(255, 215, 0, 0.25);
  padding-bottom: 0.5rem;
  width: 100%;
}

.page-products .card-flip__back-list {
  list-style: none;
  margin: 0 0 auto;
  padding: 0;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.page-products .card-flip__back-item {
  font-family: var(--font-body, 'Noto Sans SC', system-ui, sans-serif);
  font-size: 0.88rem;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.92);
  padding-left: 1.4rem;
  position: relative;
}

.page-products .card-flip__back-item::before {
  content: "▸";
  position: absolute;
  left: 0;
  color: var(--color-gold, #FFD700);
  font-weight: 700;
}

.page-products .card-flip__back .btn {
  margin-top: 1.2rem;
  align-self: flex-start;
  flex-shrink: 0;
}

.page-products .card-flip__back .btn--primary {
  background: var(--color-gold, #FFD700);
  color: #1A1A1A;
  border: none;
  font-weight: 700;
  padding: 0.6rem 1.6rem;
  border-radius: var(--radius-pill, 50px);
  font-size: 0.88rem;
  transition: background var(--transition, 0.25s ease), transform 0.2s ease;
  text-decoration: none;
  display: inline-block;
}

.page-products .card-flip__back .btn--primary:hover {
  background: #ffec3a;
  transform: scale(1.04);
}

/* ===== 数据更新区域 ===== */
.page-products__update {
  padding: 2.5rem 0;
  border-top: 1px solid rgba(255, 215, 0, 0.1);
  margin-bottom: 2rem;
}

.page-products__update-title {
  font-family: var(--font-heading, 'Poppins', system-ui, sans-serif);
  font-weight: 700;
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  color: var(--color-white, #FFFFFF);
  margin: 0 0 0.6rem;
}

.page-products__update-desc {
  font-family: var(--font-body, 'Noto Sans SC', system-ui, sans-serif);
  font-size: 0.95rem;
  color: var(--color-light-gray, #B0B0B0);
  line-height: 1.7;
  max-width: 600px;
  margin: 0 0 1.8rem;
}

.page-products__chart-wrap {
  background: var(--color-dark-panel, #1A1A1A);
  border-radius: var(--radius-lg, 20px);
  padding: 1.2rem;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(255, 215, 0, 0.06);
  max-width: 660px;
}

.page-products__chart {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  border-radius: var(--radius, 12px);
  object-fit: contain;
}

.page-products__update-note {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-bottom: 1rem;
}

.page-products .tag {
  display: inline-block;
  padding: 0.3rem 1rem;
  border-radius: var(--radius-pill, 50px);
  font-family: var(--font-accent, 'Poppins', system-ui, sans-serif);
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--color-white, #FFFFFF);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.page-products .tag--blue {
  background: rgba(0, 212, 255, 0.18);
  border-color: rgba(0, 212, 255, 0.3);
  color: var(--color-electric-blue, #00D4FF);
}

.page-products .tag--purple {
  background: rgba(155, 89, 182, 0.18);
  border-color: rgba(155, 89, 182, 0.3);
  color: var(--color-purple, #9B59B6);
}

.page-products__update-freq {
  font-family: var(--font-body, 'Noto Sans SC', system-ui, sans-serif);
  font-size: 0.88rem;
  color: var(--color-light-gray, #B0B0B0);
  line-height: 1.6;
  margin: 0;
  padding: 0.8rem 0 0;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}

/* ===== 底部号召 ===== */
.page-products__cta {
  padding: 2.5rem 0 3.5rem;
  text-align: center;
  border-top: 1px solid rgba(255, 215, 0, 0.08);
}

.page-products__cta-text {
  font-family: var(--font-heading, 'Poppins', system-ui, sans-serif);
  font-weight: 600;
  font-size: clamp(1.05rem, 2.2vw, 1.3rem);
  color: var(--color-white, #FFFFFF);
  margin: 0 0 1.5rem;
  line-height: 1.6;
}

.page-products__cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
}

.page-products .btn--primary {
  background: var(--color-deep-red, #8B0000);
  color: var(--color-white, #FFFFFF);
  border: none;
  font-weight: 700;
  padding: 0.75rem 2rem;
  border-radius: var(--radius-pill, 50px);
  font-size: 0.95rem;
  transition: background var(--transition, 0.25s ease), transform 0.2s ease;
  text-decoration: none;
  display: inline-block;
  font-family: var(--font-accent, 'Poppins', system-ui, sans-serif);
}

.page-products .btn--primary:hover {
  background: #a00000;
  transform: scale(1.04);
}

.page-products .btn--accent {
  background: var(--color-gold, #FFD700);
  color: #1A1A1A;
  border: none;
  font-weight: 700;
  padding: 0.75rem 2rem;
  border-radius: var(--radius-pill, 50px);
  font-size: 0.95rem;
  transition: background var(--transition, 0.25s ease), transform 0.2s ease;
  text-decoration: none;
  display: inline-block;
  font-family: var(--font-accent, 'Poppins', system-ui, sans-serif);
}

.page-products .btn--accent:hover {
  background: #ffec3a;
  transform: scale(1.04);
}

/* ===== 响应式微调 ===== */
@media (max-width: 480px) {
  .page-products {
    --card-flip-height: 500px;
  }

  .page-products__header {
    padding: 1.5rem 0 1.5rem;
    margin-bottom: 1.8rem;
  }

  .page-products .card-flip__front,
  .page-products .card-flip__back {
    padding: 1.5rem 1rem 1.2rem;
  }

  .page-products .card-flip__img-wrap--portrait {
    max-width: 120px;
  }

  .page-products .card-flip__img-wrap--small {
    max-width: 80px;
  }

  .page-products__cta {
    padding: 1.8rem 0 2.5rem;
  }
}

@media (min-width: 768px) and (max-width: 1023px) {
  .page-products {
    --card-flip-height: 520px;
  }

  .page-products .card-flip__front,
  .page-products .card-flip__back {
    padding: 1.8rem 1.2rem 1.5rem;
  }
}

@media (min-width: 1024px) {
  .page-products__grid {
    padding: 0 0.5rem;
  }

  .page-products .card-flip__img-wrap--portrait {
    max-width: 140px;
  }
}

/* ===== 焦点与交互增强 ===== */
.page-products .card-flip:focus-visible {
  outline: 2px solid var(--color-gold, #FFD700);
  outline-offset: 4px;
}

.page-products .card-flip__back .btn:focus-visible {
  outline: 2px solid var(--color-white, #FFFFFF);
  outline-offset: 3px;
}

/* ===== 静态 fallback ===== */
@media (prefers-reduced-motion: reduce) {
  .page-products .card-flip__inner {
    transform: none !important;
  }
  .page-products .card-flip__back {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
  }
  .page-products .card-flip:hover .card-flip__back,
  .page-products .card-flip:focus-within .card-flip__back {
    opacity: 1;
    pointer-events: auto;
  }
}