/* ===== 全站统一设计变量 ===== */
:root {
  --color-primary: #44a8f2;
  --color-primary-hover: #2d96e0;
  --color-primary-dark: #1a6bb5;
  --color-text: #333;
  --color-text-secondary: #666;
  --color-text-muted: #999;
  --color-text-inverse: #fff;
  --color-border: #eee;
  --color-bg-muted: #f8f8f8;
  --font-family-base: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Heiti SC", sans-serif;
  --font-size-body: 15px;
  --font-size-sm: 14px;
  --font-size-xs: 12px;
  --font-size-h1: 40px;
  --font-size-h2: 26px;
  --font-size-h3: 18px;
  --font-size-nav-cn: 16px;
  --font-size-nav-en: 12px;
  --line-height-body: 1.85;
  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 12px;
  --shadow-card: 0 8px 24px rgba(68, 168, 242, 0.12);
  --bg-page: linear-gradient(180deg, #e8f4fc 0%, #f5fafd 35%, #fff 100%);
  --hero-overlay: linear-gradient(90deg, rgba(12, 32, 58, 0.88) 0%, rgba(12, 32, 58, 0.5) 50%, transparent 75%);
}

body {
  color: var(--color-text-secondary);
  font-size: var(--font-size-body);
  font-family: var(--font-family-base);
}

/* ===== 下拉菜单 ===== */
.dropdown { position: relative; display: inline-block; }
.dropdown-content {
  display: none;
  position: absolute;
  background-color: #f9f9f9;
  min-width: 220px;
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
  z-index: 1000;
  top: 100%;
  left: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.dropdown-content a {
  color: var(--color-text);
  padding: 12px 16px;
  text-decoration: none;
  display: block;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-sm);
  transition: background-color 0.3s, color 0.3s;
}
.dropdown-content a:hover {
  background-color: #f1f1f1;
  color: var(--color-primary);
}
.dropdown:hover .dropdown-content { display: block; }
.dropdown.active .dropdown-content { display: block; }
.HeaderList li { position: relative; }
.HeaderList ul li > a.active:before,
.HeaderList ul li.active > a:before,
.HeaderList ul li.dropdown.is-current > a:before { height: 100%; }
.HeaderList ul li > a.active span,
.HeaderList ul li.active > a span,
.HeaderList ul li.dropdown.is-current > a span { color: var(--color-text-inverse); }

/* ===== 内页通用布局 ===== */
.model-page { background: var(--bg-page); }
.page-inner,
.model-page-inner,
.index-page-inner {
  padding-top: 24px;
  padding-bottom: 60px;
  box-sizing: border-box;
}

/* ===== Hero 横幅 ===== */
.page-hero,
.index-banner,
.model-hero {
  position: relative;
  min-height: 360px;
  display: flex;
  align-items: center;
  overflow: hidden;
  border-radius: var(--radius-lg);
  width: 100%;
  box-sizing: border-box;
}
.index-banner,
.model-hero {
  min-height: 520px;
}
.page-hero::before,
.index-banner::before,
.model-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: var(--hero-overlay);
  pointer-events: none;
}
.page-hero-inner,
.index-banner-inner,
.model-hero-inner {
  position: relative;
  z-index: 1;
  margin-left: 6%;
  padding: 40px 0;
  max-width: 560px;
  color: var(--color-text-inverse);
  box-sizing: border-box;
}
.model-hero-inner {
  min-height: 520px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 100%;
}
.index-banner-inner {
  min-height: 520px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  width: 100%;
}
.index-banner .banner-text {
  position: static;
  transform: none;
  max-width: 100%;
}
.index-banner .banner-title .line1,
.index-banner .banner-title .line2 {
  display: block;
}
.page-hero-title,
.model-hero-title,
.index-banner .banner-title {
  margin: 0 0 12px;
  font-size: var(--font-size-h1);
  font-weight: bold;
  letter-spacing: 2px;
  color: var(--color-text-inverse);
  line-height: 1.35;
}
.page-hero-sub,
.model-hero-sub,
.index-banner .banner-subtitle {
  margin: 0;
  font-size: var(--font-size-nav-cn);
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.92);
}
.model-hero-title {
  white-space: nowrap;
  letter-spacing: 4px;
}
.model-hero-title--long {
  font-size: 40px;
  white-space: normal;
  letter-spacing: 2px;
  line-height: 1.25;
}
.model-hero-sub--wide {
  max-width: 480px;
  line-height: 1.6;
}
.model-hero-sub {
  font-size: 18px;
  font-weight: bold;
  letter-spacing: 2px;
}
.index-banner .banner-subtitle { margin-bottom: 20px; }

/* ===== 按钮 ===== */
.btn-primary,
.index-banner .banner-cta,
.model-hero-btn {
  display: inline-block;
  padding: 10px 28px;
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  font-size: var(--font-size-body);
  text-decoration: none;
  border-radius: var(--radius-sm);
  border: none;
  transition: background-color 0.3s;
  cursor: pointer;
}
.btn-primary:hover,
.index-banner .banner-cta:hover,
.model-hero-btn:hover {
  background-color: var(--color-primary-hover);
  color: var(--color-text-inverse);
}

/* ===== 二级导航 ===== */
.sub-nav {
  margin: 28px 0 36px;
  border-bottom: 1px solid rgba(68, 168, 242, 0.2);
}
.sub-nav ul {
  display: flex;
  justify-content: center;
  margin: 0;
  padding: 0;
  list-style: none;
}
.sub-nav ul li a {
  display: block;
  padding: 14px 28px;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.sub-nav ul li a .span1 {
  display: block;
  font-size: var(--font-size-nav-cn);
  color: var(--color-text);
}
.sub-nav ul li a .span2 {
  display: block;
  font-size: var(--font-size-nav-en);
  color: var(--color-text-muted);
  margin-top: 2px;
}
.sub-nav ul li.active a,
.sub-nav ul li a:hover { border-bottom-color: var(--color-primary); }
.sub-nav ul li.active a .span1,
.sub-nav ul li a:hover .span1 { color: var(--color-primary); }

/* ===== 区块标题 ===== */
.section-head,
.model-section-head,
.products-section-title {
  font-size: 0;
}
.section-head span,
.model-section-head span,
.products-section-title .title-text,
.tech-core-title {
  font-size: var(--font-size-h2);
  font-weight: bold;
  color: var(--color-primary);
  letter-spacing: 0.5px;
}
.products-section-title .title-deco {
  display: flex;
  align-items: center;
  width: 100px;
  flex-shrink: 0;
}
.products-section-title .title-line {
  flex: 1;
  height: 1px;
}
.products-section-title .title-dot {
  width: 8px;
  height: 8px;
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  background: #fff;
  flex-shrink: 0;
  box-sizing: border-box;
}
.section-head em,
.model-section-head em {
  font-size: var(--font-size-nav-cn);
  font-style: normal;
  color: var(--color-text-muted);
  margin-left: 8px;
}
.section-head {
  margin: 0 0 24px;
  text-align: center;
}
.model-section-head { margin: 0 0 24px; text-align: left; }
.model-overview-cn {
  font-size: 24px;
  font-weight: bold;
  color: var(--color-primary);
}
.model-overview-en {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-left: 6px;
}

/* ===== 内容卡片 ===== */
.content-card,
.contact-card,
.cert-wrap {
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-sizing: border-box;
}
.content-card { margin-bottom: 32px; }
.intro-text,
.model-overview > p,
.contact-details p {
  font-size: var(--font-size-body);
  line-height: var(--line-height-body);
  color: var(--color-text);
  text-align: justify;
}
.intro-text p { margin: 0 0 16px; }
.intro-text p:last-child { margin-bottom: 0; }
.model-overview > p { margin: 0 0 16px; }
.model-overview > p:last-child { margin-bottom: 0; }

/* ===== 证书页 ===== */
.cert-wrap { padding: 32px 28px 20px; }
.section-head.cert-head { margin-bottom: 28px; }
.cert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.cert-card { text-align: center; }
.cert-img {
  background: #fff;
  border: 1px solid rgba(68, 168, 242, 0.12);
  border-radius: 8px;
  overflow: hidden;
  height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  box-sizing: border-box;
  transition: box-shadow 0.25s, transform 0.25s;
}
.cert-card:hover .cert-img {
  box-shadow: var(--shadow-card);
  transform: translateY(-4px);
}
.cert-img img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
}
.cert-title {
  margin: 14px 0 0;
  font-size: var(--font-size-body);
  color: var(--color-text);
  line-height: 1.4;
}
.cert-card:hover .cert-title { color: var(--color-primary); }
.cert-pages {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid rgba(68, 168, 242, 0.15);
}
.cert-pages a {
  display: inline-block;
  min-width: 36px;
  height: 36px;
  line-height: 36px;
  padding: 0 12px;
  text-align: center;
  text-decoration: none;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(68, 168, 242, 0.2);
  border-radius: 6px;
  transition: all 0.2s;
  box-sizing: border-box;
}
.cert-pages a:hover,
.cert-pages a.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-text-inverse);
}

/* ===== 联系页 ===== */
.contact-card h2 {
  margin: 0 0 28px;
  padding-bottom: 16px;
  border-bottom: 2px solid rgba(68, 168, 242, 0.25);
  font-size: 22px;
  color: var(--color-primary);
  font-weight: bold;
}
.contact-details h3 {
  margin: 0 0 6px;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  font-weight: normal;
}
.contact-details a {
  color: var(--color-primary);
  text-decoration: none;
}
.contact-details a:hover { text-decoration: underline; }
.contact-icon {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
}

/* ===== 首页产品卡片链接色 ===== */
.products-grid .card-more,
.products-grid .product-card:hover .card-title {
  color: var(--color-primary);
}
.products-section-title .title-line {
  background: linear-gradient(90deg, transparent, var(--color-primary));
}
.products-section-title .title-deco-right .title-line {
  background: linear-gradient(90deg, var(--color-primary), transparent);
}
.products-section-title .title-dot {
  border-color: var(--color-primary);
}

/* ===== 联系页 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 28px;
  align-items: stretch;
}
.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
  padding: 16px;
  background: rgba(255, 255, 255, 0.55);
  border: 1px solid rgba(68, 168, 242, 0.12);
  border-radius: var(--radius-md);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.contact-item:last-child { margin-bottom: 0; }
.contact-item:hover {
  border-color: var(--color-primary);
  box-shadow: 0 4px 14px rgba(68, 168, 242, 0.1);
}
.contact-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-inverse);
  border-radius: 50%;
  font-size: 18px;
}
.map-card {
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.75);
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 420px;
}
#map {
  width: 100%;
  height: 100%;
  min-height: 420px;
}
@media (max-width: 992px) {
  .contact-grid { grid-template-columns: 1fr; }
  .map-card, #map { min-height: 360px; }
}

/* ===== 响应式 ===== */
@media (max-width: 1200px) {
  .cert-grid { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 992px) {
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .cert-img { height: 240px; }
  .model-hero-title,
  .model-hero-title--long,
  .page-hero-title { font-size: 34px; }
}
@media (max-width: 768px) {
  .page-hero-title,
  .model-hero-title,
  .model-hero-title--long,
  .index-banner .banner-title { font-size: 30px; }
  .page-hero-inner,
  .index-banner-inner,
  .model-hero-inner { margin-left: 0; padding: 32px 24px; }
  .dropdown-content {
    display: none !important;
    position: static;
    box-shadow: none;
    border: 1px solid var(--color-border);
    margin-top: 5px;
    width: 100%;
  }
  .dropdown.mobile-active .dropdown-content { display: block !important; }
  .products-section-title .title-text,
  .tech-core-title { font-size: 20px; }
}
@media (max-width: 600px) {
  .page-hero,
  .index-banner,
  .model-hero,
  .model-hero-inner { min-height: 280px; }
  .content-card,
  .contact-card { padding: 24px 20px; }
  .model-hero-title { white-space: normal; }
}
@media (max-width: 480px) {
  .cert-grid { grid-template-columns: 1fr; }
  .cert-wrap { padding: 20px 16px; }
}

/* ===== 产品/实验模块卡片（智慧教育核心能力同款悬停） ===== */
.model-block .NProducts {
  margin-top: 0;
}
.model-block .NProducts ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 20px;
  margin: 0;
  padding: 0;
}
.model-block .NProducts ul li {
  list-style: none;
  margin-bottom: 0;
  max-width: none;
  position: relative;
  width: 32%;
  flex: 0 0 32%;
}
.model-block .NProducts--soft > ul > li {
  width: 32%;
  flex: 0 0 32%;
}
.model-block .NProducts--hard > ul > li {
  width: 48%;
  flex: 0 0 48%;
}
.model-block .NProducts--four > ul > li {
  width: calc((100% - 60px) / 4);
  flex: 0 0 calc((100% - 60px) / 4);
}
.model-block .NProducts ul li a,
.model-block .NProducts ul li .cap-item {
  display: block;
  text-decoration: none;
}
.model-block .NProducts ul li a dl dt,
.model-block .NProducts ul li .cap-item dl dt {
  position: relative;
  width: 100%;
  height: 240px;
  min-height: 240px;
  padding-bottom: 0;
  overflow: hidden;
  display: block;
  background: rgba(255, 255, 255, 0.45);
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 8px;
  transition: height 0.25s ease, box-shadow 0.25s ease;
}
.model-block .NProducts--hard ul li a dl dt {
  min-height: 260px;
  height: 260px;
}
.model-block .NProducts ul li a dl dt .CloMain,
.model-block .NProducts ul li .cap-item dl dt .CloMain {
  background-color: rgba(15, 40, 72, 0.88);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  overflow: visible;
}
.model-block .NProducts ul li a dl dt .CloMain .clo,
.model-block .NProducts ul li .cap-item dl dt .CloMain .clo {
  padding: 14px 12px;
}
.model-block .NProducts ul li a dl dt .CloMain .clo .span1,
.model-block .NProducts ul li a dl dt .CloMain .clo .shu,
.model-block .NProducts ul li .cap-item dl dt .CloMain .clo .span1,
.model-block .NProducts ul li .cap-item dl dt .CloMain .clo .shu {
  display: none;
}
.model-block .NProducts ul li a dl dt .CloMain .clo .span2,
.model-block .NProducts ul li .cap-item dl dt .CloMain .clo .span2 {
  color: rgba(255, 255, 255, 0.95);
  display: block;
  height: auto;
  overflow: visible;
  line-height: 1.55;
  text-align: left;
  font-size: 13px;
  white-space: normal;
}
.model-block .NProducts ul li a dl dt img,
.model-block .NProducts ul li .cap-item dl dt img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}
.model-block .NProducts ul li:hover {
  z-index: 5;
}
.model-block .NProducts ul li:hover a dl dt,
.model-block .NProducts ul li:hover .cap-item dl dt {
  height: auto;
  min-height: 240px;
  overflow: visible;
  box-shadow: 0 8px 20px rgba(15, 40, 72, 0.18);
}
.model-block .NProducts--hard ul li:hover a dl dt {
  min-height: 260px;
}
.model-block .NProducts ul li:hover a dl dt img,
.model-block .NProducts ul li:hover .cap-item dl dt img {
  opacity: 0;
  visibility: hidden;
}
.model-block .NProducts ul li a:hover dl dt .CloMain,
.model-block .NProducts ul li:hover .cap-item dl dt .CloMain {
  transform: scale(1, 1);
  -webkit-transform: scale(1, 1);
  position: relative;
  height: auto;
  min-height: 240px;
  display: flex;
  align-items: center;
}
.model-block .NProducts--hard ul li a:hover dl dt .CloMain {
  min-height: 260px;
}
.model-block .NProducts ul li a dl dd,
.model-block .NProducts ul li .cap-item dl dd {
  margin-top: 12px;
  padding: 0 10px;
  height: auto;
  line-height: 1.5;
  min-height: 40px;
  white-space: normal;
  text-overflow: unset;
  text-align: center;
  color: #000;
  font-size: 15px;
}
.model-block .NProducts--hard .dd-cluster {
  padding-left: 0;
  text-align: center;
}
@media (max-width: 992px) {
  .model-block .NProducts ul li,
  .model-block .NProducts--soft > ul > li,
  .model-block .NProducts--hard > ul > li {
    width: calc((100% - 20px) / 2);
    flex: 0 0 calc((100% - 20px) / 2);
  }
  .model-block .NProducts--four > ul > li {
    width: calc((100% - 20px) / 2);
    flex: 0 0 calc((100% - 20px) / 2);
  }
}
@media (max-width: 600px) {
  .model-block .NProducts ul li a dl dt,
  .model-block .NProducts ul li .cap-item dl dt {
    height: 200px;
    min-height: 200px;
  }
  .model-block .NProducts ul li:hover a dl dt,
  .model-block .NProducts ul li:hover .cap-item dl dt,
  .model-block .NProducts ul li a:hover dl dt .CloMain,
  .model-block .NProducts ul li:hover .cap-item dl dt .CloMain {
    min-height: 200px;
  }
  .model-block .NProducts ul li,
  .model-block .NProducts--soft > ul > li,
  .model-block .NProducts--hard > ul > li,
  .model-block .NProducts--four > ul > li {
    width: 100%;
    flex: 0 0 100%;
  }
}