/* ===== 页面专属：products ===== */
.page-products {
  --card-radius: 16px;
  --glass-bg: rgba(255, 255, 255, 0.75);
  --glass-border: rgba(30, 144, 255, 0.15);
  --section-spacing: clamp(3rem, 8vw, 6rem);
  --card-spacing: clamp(1.5rem, 4vw, 3rem);
  --hero-min-height: 70vh;
  color: var(--dark-blue);
}

/* ---------- 框景首屏 ---------- */
.page-products .box-frame {
  position: relative;
  min-height: var(--hero-min-height);
  display: flex;
  align-items: center;
  padding: calc(var(--header-height) + 1.5rem) 0 2.5rem;
  background: var(--snow-white);
  border-bottom: 2px solid var(--light-gray);
  isolation: isolate;
}

/* 框景刻度装饰 */
.page-products .box-frame::before,
.page-products .box-frame::after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  height: 6px;
  background: repeating-linear-gradient(
    90deg,
    var(--primary-blue) 0px,
    var(--primary-blue) 20px,
    transparent 20px,
    transparent 28px
  );
  opacity: 0.25;
}
.page-products .box-frame::before {
  top: 0;
}
.page-products .box-frame::after {
  bottom: 0;
}

/* 左侧垂直刻度线 */
.page-products .box-frame .container {
  position: relative;
}
.page-products .box-frame .container::before {
  content: '';
  position: absolute;
  top: -1.5rem;
  bottom: -1.5rem;
  left: 0;
  width: 4px;
  background: repeating-linear-gradient(
    180deg,
    var(--accent-orange) 0px,
    var(--accent-orange) 12px,
    transparent 12px,
    transparent 18px
  );
  opacity: 0.3;
}

.hero__context {
  margin-bottom: 0.75rem;
  padding-left: 1rem;
}

.hero__breadcrumb {
  font-family: var(--caption-font);
  font-weight: var(--caption-weight);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary-blue);
  background: rgba(30, 144, 255, 0.08);
  padding: 0.2rem 0.75rem;
  border-radius: 20px;
}

.hero__inner {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  padding-left: 1rem;
}

.hero__text h1 {
  font-family: var(--heading-font);
  font-weight: 300;
  font-size: clamp(2.2rem, 10vw, 4.2rem);
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--dark-blue);
  margin: 0 0 0.75rem;
}

.hero__sub {
  font-family: var(--body-font);
  font-weight: var(--body-weight);
  font-size: clamp(0.95rem, 2.5vw, 1.15rem);
  line-height: 1.6;
  color: #4a5a6a;
  max-width: 32em;
  margin: 0 0 1.5rem;
}

.hero__cta {
  display: inline-block;
  padding: 0.85rem 2.5rem;
  font-size: 1.05rem;
  font-weight: 600;
  border-radius: 50px;
  transition: transform 0.2s, box-shadow 0.2s;
  cursor: pointer;
  text-decoration: none;
}
.hero__cta:hover,
.hero__cta:focus-visible {
  transform: scale(1.03);
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.35);
}

.hero__visual {
  display: none;
}

/* ---------- 通用 section 头部 ---------- */
.section-label {
  font-family: var(--caption-font);
  font-weight: var(--caption-weight);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary-blue);
  margin-bottom: 0.3rem;
  padding-left: 0.25rem;
  border-left: 3px solid var(--accent-orange);
  padding-left: 0.6rem;
}

.section-title {
  font-family: var(--heading-font);
  font-weight: var(--heading-weight);
  font-size: clamp(1.5rem, 5vw, 2.4rem);
  line-height: 1.2;
  color: var(--dark-blue);
  margin: 0.25rem 0 2rem;
}

/* ---------- 核心功能介绍 ---------- */
.features-section {
  padding: var(--section-spacing) 0;
  background: var(--snow-white);
}

.features-grid {
  display: flex;
  flex-direction: column;
  gap: var(--card-spacing);
}

.feature-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  background: var(--glass-bg);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  border: 1px solid var(--glass-border);
  border-radius: var(--card-radius);
  padding: 1.25rem;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
  transition: box-shadow 0.25s, transform 0.25s;
}
.feature-card:hover {
  box-shadow: 0 8px 28px rgba(30, 144, 255, 0.10);
  transform: translateY(-3px);
}
.feature-card:focus-within {
  outline: 2px solid var(--primary-blue);
  outline-offset: 4px;
}

.feature-card__img {
  width: 100%;
  max-width: 180px;
  height: auto;
  aspect-ratio: 1 / 2;
  object-fit: cover;
  border-radius: 12px;
  align-self: center;
  background: var(--light-gray);
}

.feature-card__body {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.feature-card__index {
  font-family: var(--data-font);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-orange);
  letter-spacing: 0.04em;
}

.feature-card__title {
  font-family: var(--heading-font);
  font-weight: 600;
  font-size: clamp(1.1rem, 3vw, 1.4rem);
  color: var(--dark-blue);
  margin: 0;
}

.feature-card__desc {
  font-family: var(--body-font);
  font-weight: var(--body-weight);
  font-size: 0.92rem;
  line-height: 1.55;
  color: #3a4a5a;
  margin: 0;
}

.feature-card__detail {
  margin-top: 0.5rem;
  font-family: var(--body-font);
  font-size: 0.88rem;
  line-height: 1.6;
  color: #4a5a6a;
}
.feature-card__detail summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--primary-blue);
  padding: 0.2rem 0;
  list-style: none;
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  transition: color 0.2s;
}
.feature-card__detail summary::-webkit-details-marker {
  display: none;
}
.feature-card__detail summary::before {
  content: '↴';
  font-size: 1.1rem;
  color: var(--accent-orange);
  transition: transform 0.2s;
}
.feature-card__detail[open] summary::before {
  content: '↴';
  transform: rotate(180deg);
}
.feature-card__detail summary:hover {
  color: var(--accent-orange);
}
.feature-card__detail p {
  margin: 0.6rem 0 0;
  padding: 0.6rem 0.8rem;
  background: rgba(30, 144, 255, 0.04);
  border-radius: 8px;
  border-left: 3px solid var(--accent-orange);
}

/* 交替方向（桌面） */
@media (min-width: 640px) {
  .feature-card {
    flex-direction: row;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem 2rem;
  }
  .feature-card__img {
    max-width: 160px;
    flex-shrink: 0;
  }
  .feature-card__body {
    flex: 1;
  }
  /* 奇偶交替：奇数card图左文右（默认），偶数card图右文左 */
  .feature-card:nth-child(even) {
    flex-direction: row-reverse;
    text-align: right;
  }
  .feature-card:nth-child(even) .feature-card__detail p {
    border-left: none;
    border-right: 3px solid var(--accent-orange);
    text-align: left;
  }
  .feature-card:nth-child(even) .section-label {
    border-left: none;
    border-right: 3px solid var(--accent-orange);
    padding-left: 0;
    padding-right: 0.6rem;
    text-align: right;
  }
}

/* ---------- 数据更新优势 ---------- */
.advantages-section {
  padding: var(--section-spacing) 0;
  background: var(--dark-blue);
  color: var(--snow-white);
}
.advantages-section .section-label {
  color: var(--accent-orange);
  border-left-color: var(--accent-orange);
}
.advantages-section .section-title {
  color: var(--snow-white);
}

.advantages-grid {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.advantage-item {
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--card-radius);
  padding: 1.5rem 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: background 0.25s, transform 0.25s;
}
.advantage-item:hover {
  background: rgba(255, 255, 255, 0.10);
  transform: translateY(-2px);
}

.advantage-number {
  display: block;
  font-family: var(--data-font);
  font-weight: 700;
  font-size: clamp(2rem, 6vw, 3rem);
  color: var(--accent-orange);
  line-height: 1.1;
  margin-bottom: 0.3rem;
}

.advantage-label {
  display: block;
  font-family: var(--heading-font);
  font-weight: 600;
  font-size: clamp(1rem, 2.5vw, 1.2rem);
  color: var(--snow-white);
  margin-bottom: 0.4rem;
}

.advantage-desc {
  font-family: var(--body-font);
  font-weight: var(--body-weight);
  font-size: 0.88rem;
  line-height: 1.5;
  color: rgba(255, 255, 255, 0.7);
}

@media (min-width: 640px) {
  .advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
  .advantage-item {
    padding: 2rem 1.5rem;
  }
}

/* ---------- 下载方式 ---------- */
.download-section {
  padding: var(--section-spacing) 0;
  background: var(--snow-white);
}

.download-content {
  display: flex;
  flex-direction: column;
  gap: 2rem;
  align-items: center;
}

.download-qr {
  text-align: center;
}
.download-qr__img {
  width: 160px;
  height: 160px;
  object-fit: cover;
  border-radius: 16px;
  background: var(--light-gray);
  border: 2px solid var(--light-gray);
}
.download-qr__hint {
  margin-top: 0.5rem;
  font-family: var(--caption-font);
  font-weight: var(--caption-weight);
  font-size: 0.8rem;
  color: #6a7a8a;
}

.download-info {
  text-align: center;
  max-width: 420px;
}
.download-info__text {
  font-family: var(--body-font);
  font-weight: var(--body-weight);
  font-size: 1rem;
  line-height: 1.65;
  color: #3a4a5a;
  margin: 0 0 1.5rem;
}
.download-info__btn {
  display: inline-block;
  padding: 0.9rem 3rem;
  font-size: 1.1rem;
  font-weight: 600;
  border-radius: 50px;
  text-decoration: none;
  transition: transform 0.2s, box-shadow 0.2s;
}
.download-info__btn:hover,
.download-info__btn:focus-visible {
  transform: scale(1.04);
  box-shadow: 0 8px 28px rgba(255, 107, 53, 0.35);
}
.download-info__footnote {
  margin-top: 1rem;
  font-size: 0.78rem;
  line-height: 1.5;
  color: #8a9aaa;
  font-family: var(--caption-font);
}

@media (min-width: 640px) {
  .download-content {
    flex-direction: row;
    align-items: center;
    justify-content: center;
    gap: 3rem;
  }
  .download-info {
    text-align: left;
  }
  .download-info__text {
    text-align: left;
  }
}

/* ---------- 使用环境 ---------- */
.environment-section {
  padding: var(--section-spacing) 0;
  background: var(--snow-white);
  border-top: 1px solid var(--light-gray);
}

.environment-grid {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.environment-item {
  background: var(--glass-bg);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  border: 1px solid var(--glass-border);
  border-radius: var(--card-radius);
  padding: 1.25rem 1.5rem;
  transition: box-shadow 0.2s, transform 0.2s;
}
.environment-item:hover {
  box-shadow: 0 4px 16px rgba(30, 144, 255, 0.08);
  transform: translateY(-2px);
}

.environment-icon {
  font-size: 1.6rem;
  display: block;
  margin-bottom: 0.4rem;
}

.environment-item__title {
  font-family: var(--heading-font);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--dark-blue);
  margin: 0 0 0.25rem;
}

.environment-item__desc {
  font-family: var(--body-font);
  font-weight: var(--body-weight);
  font-size: 0.9rem;
  line-height: 1.55;
  color: #4a5a6a;
  margin: 0;
}

@media (min-width: 640px) {
  .environment-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }
  .environment-item {
    padding: 1.75rem 1.5rem;
  }
}

/* ---------- 相关链接 ---------- */
.related-links {
  padding: 2.5rem 0 3.5rem;
  background: var(--snow-white);
  border-top: 1px solid var(--light-gray);
}
.related-links__heading {
  font-family: var(--caption-font);
  font-weight: var(--caption-weight);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--primary-blue);
  margin-bottom: 0.75rem;
}
.related-links__list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
}
.related-links__list li a {
  font-family: var(--body-font);
  font-weight: 500;
  font-size: 0.92rem;
  color: var(--dark-blue);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s, color 0.2s;
}
.related-links__list li a:hover,
.related-links__list li a:focus-visible {
  border-bottom-color: var(--accent-orange);
  color: var(--accent-orange);
}

/* ---------- 桌面端增强 ---------- */
@media (min-width: 768px) {
  .hero__inner {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
    gap: 3rem;
  }
  .hero__text {
    flex: 1 1 55%;
  }
  .hero__visual {
    display: block;
    flex: 0 0 260px;
  }
  .hero__phone {
    width: 100%;
    height: auto;
    aspect-ratio: 1 / 2;
    object-fit: cover;
    border-radius: 20px;
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.10);
  }
  .hero__text h1 {
    font-size: clamp(2.8rem, 6vw, 4.8rem);
  }
}

@media (min-width: 1024px) {
  .page-products .box-frame {
    min-height: 60vh;
  }
  .hero__visual {
    flex: 0 0 300px;
  }
  .features-grid {
    gap: 2rem;
  }
  .feature-card {
    padding: 2rem 2.5rem;
  }
  .feature-card__img {
    max-width: 200px;
  }
}
</<PAGE_CSS>>