.page-products {
  --frame-accent: var(--primary);
  --frame-tick-size: 8px;
  --card-grid-size: 24px;
  --filter-transition: 0.3s ease;
  display: block;
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 16px 64px;
  font-family: var(--font-sans);
  color: var(--neutral-dark);
  background: var(--neutral-light);
}

/* === 面包屑 === */
.page-products .breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--neutral-mid);
  margin-bottom: 16px;
  padding: 0 4px;
  letter-spacing: 0.02em;
}
.page-products .breadcrumb a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s;
}
.page-products .breadcrumb a:hover {
  color: var(--primary-dark);
}
.page-products .breadcrumb-sep {
  color: var(--border);
  font-weight: 300;
}
.page-products .breadcrumb-current {
  font-weight: 600;
  color: var(--neutral-dark);
}

/* === 框景首屏 === */
.page-products .hero-frame {
  position: relative;
  margin-bottom: 48px;
  padding: 32px 24px;
  background: var(--white);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.page-products .hero-frame__border {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.page-products .hero-frame__tick {
  position: absolute;
  width: 28px;
  height: 28px;
  border-color: var(--frame-accent);
  border-style: solid;
  border-width: 0;
}
.page-products .hero-frame__tick--tl {
  top: 6px; left: 6px;
  border-top-width: 2px;
  border-left-width: 2px;
}
.page-products .hero-frame__tick--tr {
  top: 6px; right: 6px;
  border-top-width: 2px;
  border-right-width: 2px;
}
.page-products .hero-frame__tick--bl {
  bottom: 6px; left: 6px;
  border-bottom-width: 2px;
  border-left-width: 2px;
}
.page-products .hero-frame__tick--br {
  bottom: 6px; right: 6px;
  border-bottom-width: 2px;
  border-right-width: 2px;
}
.page-products .hero-frame__content {
  position: relative;
  z-index: 1;
  text-align: center;
}
.page-products .hero-frame__title {
  font-family: 'Montserrat', var(--font-sans);
  font-weight: 700;
  font-size: 32px;
  letter-spacing: -0.02em;
  margin: 0 0 8px;
  color: var(--neutral-dark);
}
.page-products .hero-frame__subtitle {
  font-size: 16px;
  color: var(--neutral-mid);
  margin: 0 0 20px;
  letter-spacing: 0.03em;
}
.page-products .hero-frame__meta {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}
.page-products .hero-frame__stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
}
.page-products .hero-frame__stat-num {
  font-family: 'Montserrat', var(--font-sans);
  font-weight: 700;
  font-size: 28px;
  color: var(--primary);
  line-height: 1;
}
.page-products .hero-frame__stat-label {
  font-size: 13px;
  color: var(--neutral-mid);
  letter-spacing: 0.04em;
}

/* === 通用章节头部 === */
.page-products .section-header {
  margin-bottom: 28px;
  text-align: center;
}
.page-products .section-header__title {
  font-family: 'Montserrat', var(--font-sans);
  font-weight: 700;
  font-size: 26px;
  margin: 0 0 6px;
  color: var(--neutral-dark);
  letter-spacing: -0.01em;
}
.page-products .section-header__desc {
  font-size: 15px;
  color: var(--neutral-mid);
  margin: 0;
  letter-spacing: 0.02em;
}

/* === 核心功能区域 === */
.page-products .core-functions {
  margin-bottom: 56px;
}

/* 过滤栏 */
.page-products .filter-bar {
  position: relative;
  margin-bottom: 28px;
}
.page-products .filter-state {
  position: fixed;
  top: -9999px;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
  opacity: 0;
  pointer-events: none;
}
.page-products .filter-tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}
.page-products .filter-tab {
  display: inline-block;
  padding: 8px 20px;
  font-size: 14px;
  font-weight: 600;
  color: var(--neutral-mid);
  background: var(--white);
  border: 1.5px solid var(--border);
  border-radius: 24px;
  text-decoration: none;
  transition: background 0.25s, color 0.25s, border-color 0.25s, box-shadow 0.25s;
  cursor: pointer;
  letter-spacing: 0.02em;
}
.page-products .filter-tab:hover {
  border-color: var(--primary);
  color: var(--primary-dark);
  background: color-mix(in srgb, var(--primary) 6%, var(--white));
}
/* 默认高亮 "全部" — 当没有哈希或哈希是 f-all */
.page-products .filter-tab[data-target="all"] {
  border-color: var(--primary);
  color: var(--primary-dark);
  background: color-mix(in srgb, var(--primary) 8%, var(--white));
}
#f-all:target ~ .filter-tabs .filter-tab[data-target="all"],
#f-access:target ~ .filter-tabs .filter-tab[data-target="access"],
#f-rules:target ~ .filter-tabs .filter-tab[data-target="rules"],
#f-history:target ~ .filter-tabs .filter-tab[data-target="history"] {
  border-color: var(--primary);
  color: var(--white);
  background: var(--primary);
  box-shadow: 0 2px 8px rgba(76, 175, 80, 0.25);
}

/* 卡片网格 — 默认全部显示 */
.page-products .cards-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
/* 过滤逻辑 */
.page-products #f-access:target ~ .cards-grid .card[data-category="access"] { display: flex; }
.page-products #f-access:target ~ .cards-grid .card:not([data-category="access"]) { display: none; }
.page-products #f-rules:target ~ .cards-grid .card[data-category="rules"] { display: flex; }
.page-products #f-rules:target ~ .cards-grid .card:not([data-category="rules"]) { display: none; }
.page-products #f-history:target ~ .cards-grid .card[data-category="history"] { display: flex; }
.page-products #f-history:target ~ .cards-grid .card:not([data-category="history"]) { display: none; }
/* f-all 和默认无哈希: 全部显示 */
.page-products #f-all:target ~ .cards-grid .card,
.page-products .cards-grid .card { display: flex; }

/* 单张卡片 */
.page-products .card {
  position: relative;
  flex-direction: column;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 0;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.page-products .card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.page-products .card__grid-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.3;
  background-image:
    linear-gradient(to right, var(--border) 1px, transparent 1px),
    linear-gradient(to bottom, var(--border) 1px, transparent 1px);
  background-size: var(--card-grid-size) var(--card-grid-size);
}
.page-products .card__media {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: var(--neutral-light);
}
.page-products .card__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 600 / 400;
}
.page-products .card__icon-box {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 28px 16px 12px;
  background: color-mix(in srgb, var(--primary) 6%, var(--neutral-light));
}
.page-products .card__icon {
  color: var(--primary);
  width: 56px;
  height: 56px;
}
.page-products .card__body {
  position: relative;
  z-index: 1;
  padding: 16px 18px 20px;
  flex: 1;
}
.page-products .card__index {
  display: inline-block;
  font-family: 'Montserrat', var(--font-sans);
  font-weight: 700;
  font-size: 13px;
  color: var(--primary-light);
  letter-spacing: 0.06em;
  margin-bottom: 4px;
  border-bottom: 2px solid var(--primary-light);
  padding-bottom: 2px;
}
.page-products .card__title {
  font-family: 'Montserrat', var(--font-sans);
  font-weight: 700;
  font-size: 20px;
  margin: 6px 0 8px;
  color: var(--neutral-dark);
  letter-spacing: -0.01em;
}
.page-products .card__text {
  font-size: 15px;
  line-height: 1.6;
  color: var(--neutral-mid);
  margin: 0 0 12px;
}
.page-products .card__extra {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  opacity: 0;
  max-height: 0;
  overflow: hidden;
  transition: opacity 0.35s ease, max-height 0.4s ease;
}
.page-products .card:hover .card__extra {
  opacity: 1;
  max-height: 60px;
}
.page-products .card__tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary-dark);
  background: color-mix(in srgb, var(--primary) 10%, var(--white));
  padding: 3px 10px;
  border: 1px solid color-mix(in srgb, var(--primary) 25%, transparent);
  letter-spacing: 0.02em;
}

/* === 接入方式 === */
.page-products .access-methods {
  margin-bottom: 56px;
}
.page-products .access-methods__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-bottom: 28px;
}
.page-products .access-method {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 28px 20px 24px;
  background: var(--white);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.page-products .access-method:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.page-products .access-method__icon-wrap {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: color-mix(in srgb, var(--primary) 8%, var(--neutral-light));
  margin-bottom: 12px;
}
.page-products .access-method__icon {
  width: 36px;
  height: 36px;
}
.page-products .access-method__title {
  font-family: 'Montserrat', var(--font-sans);
  font-weight: 700;
  font-size: 18px;
  margin: 0 0 6px;
  color: var(--neutral-dark);
}
.page-products .access-method__desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--neutral-mid);
  margin: 0 0 16px;
  max-width: 320px;
}
.page-products .btn-primary--sm {
  display: inline-block;
  padding: 8px 22px;
  font-size: 14px;
  font-weight: 600;
  font-family: var(--font-sans);
  color: var(--white);
  background: var(--primary);
  border: none;
  border-radius: 0;
  text-decoration: none;
  transition: background 0.25s, transform 0.15s;
  letter-spacing: 0.02em;
  cursor: pointer;
}
.page-products .btn-primary--sm:hover {
  background: var(--primary-dark);
  transform: scale(1.02);
}
.page-products .btn-primary--sm:active {
  transform: scale(0.97);
}
.page-products .access-methods__image {
  max-width: 400px;
  margin: 0 auto;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.page-products .access-methods__image img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 400 / 300;
}

/* === 常见使用场景 === */
.page-products .usage-scenarios {
  margin-bottom: 40px;
}
.page-products .usage-scenarios__banner {
  max-width: 800px;
  margin: 0 auto 28px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}
.page-products .usage-scenarios__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 800 / 300;
}
.page-products .scenarios-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.page-products .scenario {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 24px 18px;
  background: var(--white);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.page-products .scenario:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.page-products .scenario__step {
  position: absolute;
  top: 8px;
  left: 10px;
  font-family: 'Montserrat', var(--font-sans);
  font-weight: 700;
  font-size: 13px;
  color: var(--border);
  letter-spacing: 0.06em;
}
.page-products .scenario__icon-box {
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: color-mix(in srgb, var(--primary) 8%, var(--neutral-light));
  margin-bottom: 12px;
}
.page-products .scenario__icon {
  width: 40px;
  height: 40px;
}
.page-products .scenario__title {
  font-family: 'Montserrat', var(--font-sans);
  font-weight: 700;
  font-size: 18px;
  margin: 0 0 6px;
  color: var(--neutral-dark);
}
.page-products .scenario__desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--neutral-mid);
  margin: 0 0 14px;
  max-width: 280px;
}
.page-products .scenario__link {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1.5px solid transparent;
  transition: border-color 0.2s, color 0.2s;
  letter-spacing: 0.02em;
}
.page-products .scenario__link:hover {
  color: var(--primary-dark);
  border-bottom-color: var(--primary);
}

/* === 响应式：平板 & 桌面 === */
@media (min-width: 600px) {
  .page-products {
    padding: 32px 28px 80px;
  }
  .page-products .hero-frame {
    padding: 44px 36px;
  }
  .page-products .hero-frame__title {
    font-size: 38px;
  }
  .page-products .hero-frame__subtitle {
    font-size: 18px;
  }
  .page-products .hero-frame__stat-num {
    font-size: 32px;
  }
  .page-products .section-header__title {
    font-size: 28px;
  }
  .page-products .cards-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .page-products .access-methods__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .page-products .scenarios-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  .page-products .scenario__step {
    top: 10px;
    left: 14px;
    font-size: 14px;
  }
}

@media (min-width: 960px) {
  .page-products {
    padding: 40px 36px 96px;
  }
  .page-products .hero-frame {
    padding: 56px 48px;
  }
  .page-products .hero-frame__title {
    font-size: 44px;
  }
  .page-products .hero-frame__stat-num {
    font-size: 36px;
  }
  .page-products .cards-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
    max-width: 960px;
    margin: 0 auto;
  }
  .page-products .card__body {
    padding: 20px 22px 24px;
  }
  .page-products .card__title {
    font-size: 22px;
  }
  .page-products .access-methods__grid {
    max-width: 720px;
    margin: 0 auto 32px;
    gap: 28px;
  }
  .page-products .scenarios-grid {
    max-width: 960px;
    margin: 0 auto;
    gap: 28px;
  }
  .page-products .access-methods__image {
    max-width: 360px;
  }
}

/* 超大桌面留白优化 */
@media (min-width: 1200px) {
  .page-products .hero-frame__content {
    max-width: 800px;
    margin: 0 auto;
  }
  .page-products .cards-grid {
    gap: 32px;
  }
}