.page-products {
  --feature-grid-gap: var(--spacing-lg);
  --card-min-height: 340px;
  --card-bg: rgba(255, 255, 255, 0.06);
  --card-border: rgba(255, 255, 255, 0.10);
  --card-radius: 12px;
  --card-perspective: 1200px;
  --phone-max-width: 220px;
}

.page-products {
  background-color: var(--color-dark-bg);
  color: var(--color-text-light);
  padding: var(--spacing-xl) 0 var(--spacing-2xl);
  min-height: 80vh;
}

.page-products .breadcrumb {
  margin-bottom: var(--spacing-lg);
  color: rgba(255, 255, 255, 0.55);
  font-family: var(--font-body);
  font-size: var(--fs-small);
}

.page-products .breadcrumb a {
  color: var(--color-gold);
  text-decoration: none;
  transition: color var(--transition-base);
}

.page-products .breadcrumb a:hover {
  color: var(--color-text-light);
  text-decoration: underline;
}

.page-products .breadcrumb__sep {
  margin: 0 var(--spacing-xs);
  color: rgba(255, 255, 255, 0.30);
}

.page-products .breadcrumb [aria-current="page"] {
  color: var(--color-text-light);
  font-weight: 700;
}

/* ── Hero 区 ── */
.page-products__hero {
  margin-bottom: var(--spacing-2xl);
  position: relative;
}

.page-products__title {
  font-family: var(--font-heading);
  font-size: var(--fs-h1);
  color: var(--color-text-light);
  margin: 0 0 var(--spacing-sm);
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.page-products__subtitle {
  font-family: var(--font-body);
  font-size: var(--fs-h3);
  color: rgba(255, 255, 255, 0.70);
  margin: 0 0 var(--spacing-md);
  font-weight: 400;
}

.page-products__hero-line {
  width: 80px;
  height: 4px;
  background: var(--color-accent-gradient);
  border-radius: 2px;
}

/* ── 章节通用 ── */
.page-products__section {
  margin-bottom: var(--spacing-2xl);
}

.page-products .section-title {
  font-family: var(--font-heading);
  font-size: var(--fs-h2);
  color: var(--color-text-light);
  margin: 0 0 var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 3px solid var(--color-gold);
  display: inline-block;
  position: relative;
}

.page-products .section-title--center {
  display: block;
  text-align: center;
  border-bottom: none;
  padding-bottom: 0;
}

.page-products .section-title--center::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--color-gold);
  margin: var(--spacing-sm) auto 0;
  border-radius: 2px;
}

/* ── 功能卡片网格 ── */
.page-products__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--feature-grid-gap);
}

/* ── 单个卡片 ── */
.feature-card {
  perspective: var(--card-perspective);
  min-height: var(--card-min-height);
  transform: rotate(var(--rotate, 0deg));
  transition: transform var(--transition-smooth);
}

.feature-card:hover {
  z-index: 2;
}

.feature-card__inner {
  position: relative;
  width: 100%;
  height: 100%;
  min-height: var(--card-min-height);
  transition: transform 0.6s cubic-bezier(0.23, 1, 0.32, 1);
  transform-style: preserve-3d;
}

.feature-card:hover .feature-card__inner {
  transform: rotateY(180deg);
}

.feature-card__front,
.feature-card__back {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  min-height: var(--card-min-height);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: var(--card-radius);
  background: var(--card-bg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg) var(--spacing-md);
  text-align: center;
  box-sizing: border-box;
}

.feature-card__front {
  z-index: 2;
}

.feature-card__back {
  transform: rotateY(180deg);
  z-index: 1;
}

.feature-card__icon {
  width: 64px;
  height: 64px;
  object-fit: contain;
  margin-bottom: var(--spacing-md);
  filter: drop-shadow(0 0 8px rgba(244, 162, 97, 0.25));
}

.feature-card__label {
  font-family: var(--font-heading);
  font-size: var(--fs-h3);
  color: var(--color-text-light);
  margin: 0 0 var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.feature-card__number {
  font-family: var(--font-heading);
  font-size: 3.2rem;
  color: var(--color-gold);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
  text-shadow: 0 0 20px rgba(244, 162, 97, 0.35);
  display: block;
}

.feature-card__brief {
  font-family: var(--font-body);
  font-size: var(--fs-small);
  color: rgba(255, 255, 255, 0.65);
  margin: 0;
}

.feature-card__desc {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  color: rgba(255, 255, 255, 0.85);
  line-height: 1.6;
  margin: 0 0 var(--spacing-md);
  max-width: 90%;
}

.feature-card .btn--gold {
  background: var(--color-gold);
  color: var(--color-text-dark);
  font-family: var(--font-heading);
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: var(--spacing-sm) var(--spacing-lg);
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background var(--transition-base), transform var(--transition-base);
  text-decoration: none;
  display: inline-block;
  box-shadow: var(--shadow-glow-gold);
}

.feature-card .btn--gold:hover {
  background: #e8964a;
  transform: scale(1.04);
}

/* ── 使用方式区域 ── */
.page-products__usage {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
}

.usage-card {
  background: var(--card-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--card-border);
  border-radius: var(--card-radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.usage-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.40);
}

.usage-card--web .usage-card__image {
  width: 100%;
  height: auto;
  max-height: 260px;
  object-fit: cover;
  display: block;
}

.usage-card--mobile {
  flex-direction: column;
  align-items: center;
}

.usage-card__phone {
  width: 120px;
  height: auto;
  max-height: 260px;
  object-fit: contain;
  margin: var(--spacing-md) auto var(--spacing-sm);
  filter: drop-shadow(0 4px 20px rgba(0, 0, 0, 0.40));
}

.usage-card__body {
  padding: var(--spacing-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.usage-card__title {
  font-family: var(--font-heading);
  font-size: var(--fs-h3);
  color: var(--color-text-light);
  margin: 0 0 var(--spacing-sm);
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.usage-card__text {
  font-family: var(--font-body);
  font-size: var(--fs-body);
  color: rgba(255, 255, 255, 0.80);
  line-height: 1.7;
  margin: 0 0 var(--spacing-md);
  flex: 1;
}

.usage-card__note {
  font-family: var(--font-body);
  font-size: var(--fs-small);
  color: var(--color-gold);
  margin: var(--spacing-sm) 0 0;
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(244, 162, 97, 0.08);
  border-radius: var(--border-radius);
  border-left: 3px solid var(--color-gold);
}

.usage-card .btn--outline {
  background: transparent;
  color: var(--color-text-light);
  font-family: var(--font-heading);
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: var(--spacing-sm) var(--spacing-lg);
  border: 2px solid var(--color-text-light);
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background var(--transition-base), color var(--transition-base);
  text-decoration: none;
  display: inline-block;
  align-self: flex-start;
}

.usage-card .btn--outline:hover {
  background: var(--color-text-light);
  color: var(--color-text-dark);
}

/* ── CTA 区域 ── */
.page-products__cta-inner {
  background: var(--color-accent-gradient);
  border-radius: var(--card-radius);
  padding: var(--spacing-xl) var(--spacing-lg);
  text-align: center;
  box-shadow: var(--shadow-card);
}

.page-products__cta-text {
  font-family: var(--font-body);
  font-size: var(--fs-h3);
  color: var(--color-text-light);
  margin: 0 auto var(--spacing-lg);
  max-width: 600px;
  opacity: 0.90;
}

.page-products__cta-links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  justify-content: center;
}

.page-products__cta-links .btn--primary {
  background: var(--color-text-light);
  color: var(--color-primary-red);
  font-family: var(--font-heading);
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: var(--spacing-sm) var(--spacing-xl);
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: transform var(--transition-base);
  text-decoration: none;
  display: inline-block;
}

.page-products__cta-links .btn--primary:hover {
  transform: scale(1.04);
}

.page-products__cta-links .btn--gold {
  background: var(--color-gold);
  color: var(--color-text-dark);
  font-family: var(--font-heading);
  font-size: var(--fs-small);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  padding: var(--spacing-sm) var(--spacing-xl);
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background var(--transition-base), transform var(--transition-base);
  text-decoration: none;
  display: inline-block;
  box-shadow: var(--shadow-glow-gold);
}

.page-products__cta-links .btn--gold:hover {
  background: #e8964a;
  transform: scale(1.04);
}

/* ── 桌面端（≥768px） ── */
@media (min-width: 768px) {
  .page-products {
    padding: var(--spacing-2xl) 0 var(--spacing-2xl);
  }

  .page-products__title {
    font-size: 3rem;
  }

  .page-products__subtitle {
    font-size: var(--fs-h3);
  }

  .page-products__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-products__usage {
    grid-template-columns: 3fr 2fr;
    align-items: start;
  }

  .usage-card--web .usage-card__image {
    max-height: 240px;
  }

  .usage-card__phone {
    width: 140px;
    margin-top: var(--spacing-lg);
  }

  .feature-card__icon {
    width: 72px;
    height: 72px;
  }

  .feature-card__number {
    font-size: 3.6rem;
  }

  .feature-card {
    min-height: 360px;
  }

  .feature-card__inner {
    min-height: 360px;
  }

  .feature-card__front,
  .feature-card__back {
    min-height: 360px;
  }
}

/* ── 大桌面端（≥1024px） ── */
@media (min-width: 1024px) {
  .page-products__grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .page-products__title {
    font-size: 3.5rem;
  }

  .page-products__usage {
    grid-template-columns: 1fr 1fr;
  }

  .usage-card--web {
    flex-direction: row;
    align-items: center;
  }

  .usage-card--web .usage-card__image {
    width: 55%;
    max-height: 100%;
    height: 100%;
    object-fit: cover;
    flex-shrink: 0;
  }

  .usage-card--web .usage-card__body {
    padding: var(--spacing-xl);
  }

  .usage-card--mobile {
    flex-direction: row;
    align-items: center;
  }

  .usage-card__phone {
    width: 160px;
    margin: var(--spacing-lg);
    flex-shrink: 0;
  }

  .feature-card__number {
    font-size: 4rem;
  }

  .feature-card {
    min-height: 380px;
  }

  .feature-card__inner {
    min-height: 380px;
  }

  .feature-card__front,
  .feature-card__back {
    min-height: 380px;
  }

  .page-products__cta-inner {
    padding: var(--spacing-2xl) var(--spacing-xl);
  }
}

.page-products {
  --rotate: inherit;
}