.page-products {
  --dl-btn-red: #E63946;
  --dl-btn-orange: #F4A261;
  --dl-gradient: linear-gradient(135deg, var(--dl-btn-red), var(--dl-btn-orange));
  --card-bg: #121A22;
  --border-glow: 0 0 0 1px rgba(230,57,70,0.3);
  --step-shadow: 4px 4px 0 rgba(230,57,70,0.2);
  --tab-radius: 8px;
  --scene-radius: 12px;
  --phone-shadow: 12px 12px 0 rgba(29,53,87,0.5);
  --transition-fast: 0.25s cubic-bezier(0.4,0,0.2,1);
  --transition-slow: 0.4s cubic-bezier(0.4,0,0.2,1);

  display: block;
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 1.25rem 1rem 2rem;
  color: var(--light-text);
  font-family: var(--font-body);
  line-height: 1.6;
}

/* 面包屑 */
.page-products .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem 0.5rem;
  font-size: 0.8rem;
  color: var(--mineral-gray);
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid rgba(141,153,174,0.2);
}
.page-products .breadcrumb a {
  color: var(--mineral-gray);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.page-products .breadcrumb a:hover {
  color: var(--primary-red);
}
.page-products .breadcrumb .sep {
  color: var(--primary-red);
  font-weight: 600;
}
.page-products .breadcrumb [aria-current="page"] {
  color: var(--light-text);
  font-weight: 600;
}

/* 标题区 */
.page-products .page-title-area {
  margin-bottom: 2rem;
  position: relative;
}
.page-products .page-title-area::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--dl-gradient);
  margin-top: 0.75rem;
  border-radius: 2px;
}
.page-products .page-heading {
  font-family: var(--font-heading);
  font-size: 2.8rem;
  line-height: 1;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--light-text);
  margin: 0 0 0.25rem;
}
.page-products .page-subhead {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--primary-red);
  margin: 0.5rem 0 0.3rem;
  letter-spacing: 0.01em;
}
.page-products .page-desc {
  font-size: 0.9rem;
  color: var(--mineral-gray);
  margin: 0;
  max-width: 520px;
}

/* 下载展示区 - 双列布局 */
.page-products .download-showcase {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  margin-bottom: 3rem;
}
.page-products .showcase-left {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}
.page-products .showcase-right {
  flex: 1;
}

/* 手机模型 */
.page-products .phone-frame {
  position: relative;
  width: 180px;
  height: 320px;
  border: 3px solid var(--tech-blue);
  border-radius: 20px;
  box-shadow: var(--phone-shadow);
  overflow: hidden;
  background: var(--deep-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}
.page-products .phone-frame:hover {
  transform: translateY(-4px) scale(1.02);
  box-shadow: 16px 16px 0 rgba(29,53,87,0.6);
}
.page-products .phone-screen {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 14px;
}

/* 下载操作区 */
.page-products .download-actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  width: 100%;
}

.page-products .qr-wrapper {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  cursor: default;
  transition: transform var(--transition-slow);
}
.page-products .qr-wrapper:hover {
  transform: scale(1.12);
  z-index: 10;
}
.page-products .qr-code {
  width: 120px;
  height: 120px;
  border: 2px solid var(--primary-red);
  border-radius: var(--radius-sm);
  display: block;
  object-fit: cover;
  transition: box-shadow var(--transition-fast);
}
.page-products .qr-wrapper:hover .qr-code {
  box-shadow: 0 0 20px rgba(230,57,70,0.4);
}
.page-products .qr-hint {
  font-size: 0.75rem;
  color: var(--mineral-gray);
  letter-spacing: 0.04em;
}

.page-products .store-badges {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
}
.page-products .btn--store {
  display: inline-block;
  padding: 0.6rem 1.4rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--dl-gradient);
  color: var(--light-text);
  box-shadow: var(--shadow-heavy);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
  cursor: default;
  user-select: none;
}
.page-products .btn--store:hover {
  transform: translate(-2px, -2px);
  box-shadow: 10px 10px 0 rgba(230,57,70,0.35);
}
.page-products .btn--ios {
  background: linear-gradient(135deg, var(--primary-red), #c62a36);
}
.page-products .btn--android {
  background: linear-gradient(135deg, var(--moss-green), #1f7a6e);
}
.page-products .store-note {
  font-size: 0.75rem;
  color: var(--mineral-gray);
  margin: 0;
  text-align: center;
  letter-spacing: 0.02em;
}

/* 功能标签页 */
.page-products .feature-tabs {
  width: 100%;
  background: var(--card-bg);
  border: var(--border-thick-blue);
  border-radius: var(--radius-md);
  padding: 1rem 1rem 1.2rem;
  box-shadow: var(--shadow-card);
}
.page-products .feature-tabs input[type="radio"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
  pointer-events: none;
}

.page-products .tab-labels {
  display: flex;
  gap: 0.3rem;
  margin-bottom: 1.2rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 4px;
  scrollbar-width: thin;
  scrollbar-color: var(--primary-red) transparent;
}
.page-products .tab-labels::-webkit-scrollbar {
  height: 4px;
}
.page-products .tab-labels::-webkit-scrollbar-thumb {
  background: var(--primary-red);
  border-radius: 2px;
}
.page-products .tab-labels label {
  flex-shrink: 0;
  scroll-snap-align: start;
  display: inline-block;
  padding: 0.5rem 1.1rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--mineral-gray);
  background: rgba(29,53,87,0.3);
  border: 1px solid transparent;
  border-radius: var(--tab-radius);
  cursor: pointer;
  transition: all var(--transition-fast);
  user-select: none;
}
.page-products .tab-labels label:hover {
  color: var(--light-text);
  background: rgba(230,57,70,0.2);
  border-color: var(--primary-red);
}

.page-products #tab-feat1:checked ~ .tab-labels label[for="tab-feat1"],
.page-products #tab-feat2:checked ~ .tab-labels label[for="tab-feat2"],
.page-products #tab-feat3:checked ~ .tab-labels label[for="tab-feat3"],
.page-products #tab-feat4:checked ~ .tab-labels label[for="tab-feat4"] {
  color: var(--light-text);
  background: var(--primary-red);
  border-color: var(--primary-red);
  box-shadow: 0 2px 8px rgba(230,57,70,0.3);
}

.page-products .tab-contents {
  position: relative;
  min-height: 200px;
}

.page-products .tab-content {
  display: none;
  animation: tabFadeIn 0.4s ease forwards;
  padding: 0.5rem 0;
}
@keyframes tabFadeIn {
  from { opacity: 0; transform: translateX(12px); }
  to { opacity: 1; transform: translateX(0); }
}

.page-products #tab-feat1:checked ~ .tab-contents #tabpanel1,
.page-products #tab-feat2:checked ~ .tab-contents #tabpanel2,
.page-products #tab-feat3:checked ~ .tab-contents #tabpanel3,
.page-products #tab-feat4:checked ~ .tab-contents #tabpanel4 {
  display: block;
}

.page-products .tab-icon {
  display: block;
  width: 72px;
  height: 72px;
  object-fit: contain;
  margin-bottom: 0.75rem;
  border-radius: var(--radius-sm);
  background: rgba(230,57,70,0.08);
  padding: 4px;
}

.page-products .tab-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--light-text);
  margin: 0 0 0.4rem;
}
.page-products .tab-desc {
  font-size: 0.9rem;
  color: var(--mineral-gray);
  margin: 0;
  max-width: 400px;
}

/* 配置指南 */
.page-products .config-guide {
  margin-bottom: 3rem;
  position: relative;
}
.page-products .config-guide::before {
  content: '';
  position: absolute;
  top: 0;
  left: 28px;
  width: 2px;
  height: 100%;
  background: linear-gradient(to bottom, var(--primary-red), var(--vibrant-orange));
  opacity: 0.3;
  z-index: 0;
}
.page-products #guide-heading {
  font-family: var(--font-heading);
  font-size: 2rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--light-text);
  margin: 0 0 0.25rem;
}
.page-products .guide-intro {
  font-size: 0.9rem;
  color: var(--mineral-gray);
  margin: 0 0 1.8rem;
}
.page-products .guide-steps {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  position: relative;
  z-index: 1;
}

.page-products .guide-step {
  background: var(--card-bg);
  border: 1px solid rgba(230,57,70,0.2);
  border-radius: var(--radius-md);
  box-shadow: var(--step-shadow);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  overflow: hidden;
}
.page-products .guide-step[open] {
  border-color: var(--primary-red);
  box-shadow: 6px 6px 0 rgba(230,57,70,0.25);
}
.page-products .step-summary {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.2rem;
  cursor: pointer;
  list-style: none;
  user-select: none;
}
.page-products .step-summary::-webkit-details-marker {
  display: none;
}
.page-products .step-summary::marker {
  display: none;
  content: '';
}
.page-products .step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  font-family: var(--font-heading);
  font-size: 1.6rem;
  line-height: 1;
  color: var(--light-text);
  background: var(--dl-gradient);
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 2px 8px rgba(230,57,70,0.3);
}
.page-products .step-label {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--light-text);
  transition: color var(--transition-fast);
}
.page-products .guide-step[open] .step-label {
  color: var(--primary-red);
}
.page-products .step-detail {
  padding: 0.2rem 1.2rem 1rem 3.8rem;
  font-size: 0.9rem;
  color: var(--mineral-gray);
  animation: stepSlide 0.3s ease forwards;
}
@keyframes stepSlide {
  from { opacity: 0; transform: translateY(-6px); }
  to { opacity: 1; transform: translateY(0); }
}
.page-products .step-detail p {
  margin: 0.5rem 0;
}
.page-products .step-img {
  display: block;
  width: 100%;
  max-width: 480px;
  height: auto;
  border-radius: var(--radius-sm);
  margin: 0.5rem 0 0.75rem;
  border: 1px solid rgba(141,153,174,0.15);
}

/* 适用场景 */
.page-products .use-scenes {
  margin-bottom: 2.5rem;
}
.page-products #scene-heading {
  font-family: var(--font-heading);
  font-size: 2rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--light-text);
  margin: 0 0 1.2rem;
}
.page-products .scene-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
}
.page-products .scene-card {
  background: var(--card-bg);
  border: var(--border-thick);
  border-radius: var(--scene-radius);
  overflow: hidden;
  box-shadow: var(--shadow-heavy);
  transition: transform var(--transition-slow), box-shadow var(--transition-slow);
}
.page-products .scene-card:hover {
  transform: translateY(-4px);
  box-shadow: 12px 12px 0 rgba(230,57,70,0.3);
}
.page-products .scene-img {
  display: block;
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-bottom: 2px solid rgba(230,57,70,0.2);
}
.page-products .scene-title {
  font-family: var(--font-heading);
  font-size: 1.3rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--light-text);
  margin: 0.75rem 1rem 0.3rem;
}
.page-products .scene-desc {
  font-size: 0.88rem;
  color: var(--mineral-gray);
  margin: 0 1rem 1rem;
  line-height: 1.5;
}

/* 内部链接 */
.page-products .internal-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.6rem 1rem;
  padding: 1.2rem 1rem;
  background: rgba(29,53,87,0.25);
  border: 1px solid rgba(141,153,174,0.15);
  border-radius: var(--radius-md);
  margin-top: 0.5rem;
}
.page-products .internal-links p {
  font-size: 0.9rem;
  color: var(--mineral-gray);
  margin: 0;
  font-weight: 500;
}

/* 工具类 */
.page-products .visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0,0,0,0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.page-products .btn--outline {
  display: inline-block;
  padding: 0.45rem 1.2rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--primary-red);
  background: transparent;
  border: 2px solid var(--primary-red);
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: all var(--transition-fast);
  cursor: pointer;
}
.page-products .btn--outline:hover {
  background: var(--primary-red);
  color: var(--light-text);
}
.page-products .btn--small {
  padding: 0.35rem 1rem;
  font-size: 0.75rem;
}

/* ====== 桌面端 ≥768px ====== */
@media (min-width: 768px) {
  .page-products {
    padding: 1.5rem 2rem 3rem;
  }
  .page-products .page-heading {
    font-size: 3.6rem;
  }
  .page-products .page-subhead {
    font-size: 1.1rem;
  }

  .page-products .download-showcase {
    flex-direction: row;
    align-items: flex-start;
    gap: 2.5rem;
  }
  .page-products .showcase-left {
    flex: 0 0 280px;
    align-items: center;
    position: sticky;
    top: calc(var(--header-h) + 1rem);
  }
  .page-products .phone-frame {
    width: 200px;
    height: 360px;
  }
  .page-products .showcase-right {
    flex: 1;
    min-width: 0;
  }
  .page-products .feature-tabs {
    padding: 1.2rem 1.5rem 1.5rem;
  }
  .page-products .tab-content {
    display: none;
    padding: 0.5rem 0.5rem;
  }
  .page-products .tab-icon {
    width: 80px;
    height: 80px;
  }
  .page-products .tab-title {
    font-size: 1.6rem;
  }

  .page-products .guide-steps {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1.2rem;
  }
  .page-products .config-guide::before {
    display: none;
  }
  .page-products .guide-step {
    border-radius: var(--radius-md);
  }
  .page-products .step-summary {
    flex-direction: column;
    text-align: center;
    padding: 1.2rem 1rem;
  }
  .page-products .step-num {
    width: 52px;
    height: 52px;
    font-size: 1.8rem;
  }
  .page-products .step-detail {
    padding: 0.2rem 1rem 1rem;
    text-align: center;
  }
  .page-products .step-img {
    margin-left: auto;
    margin-right: auto;
  }

  .page-products .scene-grid {
    grid-template-columns: 1fr 1fr;
  }
  .page-products .scene-img {
    height: 200px;
  }

  .page-products .internal-links {
    padding: 1.2rem 2rem;
    justify-content: center;
  }
}

/* ====== 宽屏 ≥1024px ====== */
@media (min-width: 1024px) {
  .page-products .page-heading {
    font-size: 4.2rem;
  }
  .page-products .showcase-left {
    flex: 0 0 320px;
  }
  .page-products .phone-frame {
    width: 220px;
    height: 400px;
  }
  .page-products .tab-labels label {
    font-size: 1.1rem;
    padding: 0.6rem 1.4rem;
  }
  .page-products .tab-icon {
    width: 88px;
    height: 88px;
  }
  .page-products .scene-img {
    height: 220px;
  }
}