/* ===== 基础重置与变量 ===== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary: #2987BA;
  --primary-dark: #1E6F96;
  --primary-light: #4BA5D4;
  --accent: #2987BA;
  --accent-hover: #1E6F96;
  --text: #2c3e50;
  --text-light: #7f8c8d;
  --bg: #ffffff;
  --bg-light: #f8f9fa;
  --bg-dark: #163547;
  --border: #e0e0e0;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 0.3s ease;
  --header-height: 70px;
  --topbar-height: 40px;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  line-height: 1.6;
  background: var(--bg);
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition);
}

img {
  max-width: 100%;
  display: block;
}

ul {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.icon {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-block;
  padding: 12px 32px;
  border-radius: var(--radius);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  text-align: center;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(41, 135, 186, 0.4);
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.85rem;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius);
}

.btn-sm:hover {
  background: var(--accent-hover);
}



.product-features {
  max-width: 900px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: #333;
  line-height: 1.7;
  font-size: 14px;
}

.product-features h2 {
  margin: 0 0 16px;
  padding: 0;
  font-size: 18px;
  font-weight: 700;
  color: #1e6f96;
  letter-spacing: 0.5px;
}

.product-features ul {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid #e5e7eb;
  border-radius: 6px;
  overflow: hidden;
}

.product-features li {
  position: relative;
  padding: 12px 16px 12px 32px;
  border-bottom: 1px solid #e5e7eb;
}

.product-features li:last-child {
  border-bottom: none;
}

.product-features li:nth-child(odd) {
  background: #f9fafb;
}

.product-features li:nth-child(even) {
  background: #fff;
}

.product-features li::before {
  content: "•";
  position: absolute;
  left: 14px;
  color: #1e6f96;
  font-weight: 700;
}


.table {
width: 100%;
border-collapse: collapse;
border: 1px solid #ccc;
font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
font-size: 14px;
color: #000;
table-layout: fixed;
}

.table th,
.table td {
padding: 12px 15px;
text-align: center;
vertical-align: middle;
line-height: 1.6;
}

.table th {
background-color: #00aeef;
font-weight: normal;
border: 1px solid #fff;
}

.table th:last-child {
border-right: none;
}

.table td {
background-color: #fff;
border: 1px dotted #ccc;
}



/* ===== 顶部信息栏 ===== */
.top-bar {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.8rem;
  height: var(--topbar-height);
  display: flex;
  align-items: center;
}

.top-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
}

.top-bar-left {
  display: flex;
  gap: 24px;
}

.top-bar-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.top-bar-right {
  opacity: 0.8;
}

/* ===== 导航栏 ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--bg);
  box-shadow: var(--shadow);
  height: var(--header-height);
  transition: box-shadow var(--transition);
  overflow: visible;
}

.header.scrolled {
  box-shadow: var(--shadow-lg);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary-dark);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-item {
  position: relative;
}

.nav-link,
.nav-link-row {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 8px 16px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text);
  border-radius: var(--radius);
  transition: color var(--transition);
}

.nav-link-text {
  line-height: 1.4;
}

a.nav-link-text {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

.nav-link .arrow,
.nav-link-row .arrow {
  width: 14px;
  height: 14px;
  transition: transform var(--transition);
}

.nav-item:hover > .nav-link,
.nav-item:hover > .nav-link-row,
.nav-item.active > .nav-link,
.nav-item.active > .nav-link-row,
.nav-item.active .nav-link-text {
  color: var(--primary);
}

.nav-item.active > .nav-link:not(.nav-link-contact),
.nav-item.active > .nav-link-row {
  background: rgba(41, 135, 186, 0.08);
}

.nav-item.active .nav-link-text {
  font-weight: 600;
}

.nav-item.active > .nav-link.nav-link-contact {
  background: var(--primary-dark);
  color: #fff !important;
}

.nav-item.has-dropdown:hover .arrow,
.nav-item.has-dropdown.active .arrow {
  transform: rotate(180deg);
}

.nav-mobile-head {
  display: none;
}

.submenu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  padding: 0;
  color: inherit;
  cursor: default;
  pointer-events: none;
}

/* 下拉菜单 */
.has-dropdown {
  position: relative;
}

.dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 180px;
  background: var(--bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 8px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition);
}

.has-dropdown:hover .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown li a {
  display: block;
  padding: 10px 20px;
  font-size: 0.9rem;
  color: var(--text);
  transition: all var(--transition);
}

.dropdown li a:hover {
  color: var(--primary);
}

.dropdown li a.active {
  color: var(--primary);
  background: rgba(41, 135, 186, 0.06);
  font-weight: 600;
}

/* 桌面端下拉与导航栏底部对齐 */
@media (min-width: 769px) {
  .nav-list {
    height: var(--header-height);
  }

  .nav-item.has-dropdown {
    height: 100%;
    display: flex;
    align-items: center;
  }

  .dropdown {
    top: 100%;
    margin-top: 0;
    transform: none;
    border-radius: 0 0 var(--radius) var(--radius);
  }

  .has-dropdown:hover .dropdown {
    transform: none;
  }
}

.nav-overlay {
  display: none;
}

/* 汉堡菜单按钮 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  transition: all var(--transition);
  border-radius: 2px;
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Banner 轮播 ===== */
.banner {
  position: relative;
  height: 560px;
  overflow: hidden;
}

.banner-slider {
  height: 100%;
  position: relative;
  overflow: hidden;
  touch-action: pan-y;
}

.banner-track {
  display: flex;
  height: 100%;
  transition: transform 0.5s ease;
  will-change: transform;
}

.banner-track.dragging {
  transition: none;
}

.banner-slide {
  flex: 0 0 100%;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
}

.banner-content {
  color: #fff;
  max-width: 900px;
  text-align: center;
}

.banner-title {
  font-size: 2.8rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
  animation: fadeInUp 0.8s ease;
}

.banner-desc {
  font-size: 1.35rem;
  font-weight: 400;
  opacity: 0.92;
  margin-bottom: 32px;
  line-height: 1.8;
  animation: fadeInUp 0.8s ease 0.2s both;
}

.banner-content .btn {
  animation: fadeInUp 0.8s ease 0.4s both;
}

.banner-dots {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 10;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.6);
  background: transparent;
  cursor: pointer;
  transition: all var(--transition);
}

.dot.active,
.dot:hover {
  background: #fff;
  border-color: #fff;
}

.banner-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: #fff;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  z-index: 10;
  backdrop-filter: blur(4px);
}

.banner-arrow svg {
  width: 20px;
  height: 20px;
}

.banner-arrow:hover {
  background: rgba(255, 255, 255, 0.3);
}

.banner-prev { left: 20px; }
.banner-next { right: 20px; }

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== 通用区块 ===== */
.section {
  padding: 80px 0;
}

.section:nth-child(even) {
  background: var(--bg-light);
}

.section-header {
  text-align: center;
  margin-bottom: 50px;
}

.section-tag {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--accent);
  margin-bottom: 12px;
}

.section-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 12px;
}

.section-desc {
  font-size: 1rem;
  color: var(--text-light);
  max-width: 500px;
  margin: 0 auto;
}

/* ===== 系统方案 ===== */
.solutions {
  background: var(--bg);
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.solution-item {
  display: flex;
  flex-direction: column;
  background: var(--bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform var(--transition);
}

.solution-item:hover {
  transform: translateY(-4px);
}

.solution-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary-dark);
  padding: 24px 24px 16px;
  line-height: 1.4;
  position: relative;
}

.solution-title::after {
  content: "";
  display: block;
  width: 40px;
  height: 3px;
  background: var(--primary);
  margin-top: 12px;
  border-radius: 2px;
}

.solution-img {
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  display: grid;
  place-items: center;
  padding: 12px;
  background: var(--bg-light);
  box-sizing: border-box;
}

.solution-img img {
  display: block;
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  object-position: center center;
  transition: transform 0.5s ease;
}

.solution-item:hover .solution-img img {
  transform: scale(1.03);
}

.solution-desc {
  font-size: 0.95rem;
  color: var(--text-light);
  line-height: 1.8;
  padding: 20px 24px 0;
  flex: 1;
}

.solutions .solution-desc {
  font-size: 0.8125rem;
  color: #444;
  line-height: 1.65;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
}

.solutions .solution-img-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.solutions .solution-title a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

.solutions .solution-title a:hover {
  color: var(--primary);
}

.solution-link {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--primary);
  padding: 16px 24px 24px;
  transition: color var(--transition);
}

.solution-link:hover {
  color: var(--primary-dark);
}

/* ===== 产品展示 ===== */
.products {
  background: #F5F5F5;
}

.products-carousel {
  position: relative;
  padding: 0 48px;
}

.products-viewport {
  overflow: hidden;
  touch-action: pan-y;
}

.products-track {
  display: flex;
  gap: 24px;
  transition: transform 0.45s ease;
  will-change: transform;
}

.products-track.dragging {
  transition: none;
}

.product-card {
  flex: 0 0 calc((100% - 72px) / 4);
  background: var(--bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  user-select: none;
}

.products-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--primary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition);
  z-index: 2;
  box-shadow: var(--shadow);
}

.products-arrow svg {
  width: 20px;
  height: 20px;
}

.products-arrow:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.products-arrow:disabled {
  opacity: 0.35;
  cursor: not-allowed;
  pointer-events: none;
}

.products-prev {
  left: 0;
}

.products-next {
  right: 0;
}

.products-dots {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 28px;
}

.products-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  border: none;
  background: var(--border);
  cursor: pointer;
  padding: 0;
  transition: all var(--transition);
}

.products-dot.active,
.products-dot:hover {
  background: var(--primary);
  transform: scale(1.2);
}

.products-carousel--static .products-arrow,
.products-carousel--static .products-dots {
  display: none;
}

.products-carousel--static {
  padding: 0;
}

.product-img {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.product-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.product-card:hover .product-img img {
  transform: scale(1.08);
}

.product-overlay {
  position: absolute;
  inset: 0;
  background: rgba(41, 135, 186, 0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}

.product-card:hover .product-overlay {
  opacity: 1;
}

.product-info {
  padding: 24px;
}

.product-title {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--primary-dark);
}

.product-desc {
  font-size: 0.8125rem;
  color: #444;
  line-height: 1.65;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
}

/* ===== 合作伙伴 ===== */
.partners {
  background: var(--bg-light);
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 24px;
}

.partner-item {
  position: relative;
  background: var(--bg);
  border-radius: var(--radius);
  padding: 0;
  box-shadow: var(--shadow);
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
  border: 1px solid var(--border);
  overflow: hidden;
  aspect-ratio: 2 / 1;
}

.partner-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary-light);
}

.partner-item-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  padding: 0;
  line-height: 0;
  box-sizing: border-box;
}

.partner-item-img img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: none;
  max-height: none;
  object-fit: fill;
  object-position: center center;
}

.partner-item:hover .partner-item-img img {
  transform: none;
}

.partner-logo {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-light);
  text-align: center;
  transition: color var(--transition);
}

.partner-item:hover .partner-logo {
  color: var(--primary);
}

/* ===== 新闻资讯 ===== */
.news-tabs {
  display: flex;
  justify-content: center;
  gap: 0;
  margin-bottom: 40px;
  border-bottom: 2px solid var(--border);
}

.news-tab {
  padding: 12px 32px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-light);
  background: none;
  border: none;
  cursor: pointer;
  position: relative;
  transition: color var(--transition);
}

.news-tab::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.news-tab.active,
.news-tab:hover {
  color: var(--primary);
}

.news-tab.active::after {
  transform: scaleX(1);
}

.news-panel {
  display: none;
}

.news-panel.active {
  display: block;
  animation: fadeInUp 0.5s ease;
}

.news-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.news-card.featured {
  background: var(--bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

.news-card.featured:hover {
  box-shadow: var(--shadow-lg);
}

.news-img {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  display: grid;
  place-items: center;
  padding: 12px;
  background: var(--bg-light);
  box-sizing: border-box;
}

.news-img img {
  display: block;
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  object-position: center center;
  transition: transform 0.5s ease;
}

.news-card:hover .news-img img {
  transform: scale(1.03);
}

.news-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  background: var(--accent);
  color: #fff;
  font-size: 0.75rem;
  padding: 4px 12px;
  border-radius: 20px;
  font-weight: 500;
}

.news-body {
  padding: 24px;
}

.news-date {
  font-size: 0.8rem;
  color: var(--text-light);
}

.news-title {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 8px 0 12px;
  color: var(--primary-dark);
  line-height: 1.5;
}

.news-excerpt {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}

.news-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--primary);
}

.news-link:hover {
  color: var(--accent);
}

.news-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.news-item {
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  transition: padding-left var(--transition);
}

.news-item:first-child {
  padding-top: 0;
}

.news-item:last-child {
  border-bottom: none;
}

.news-item:hover {
  padding-left: 8px;
}

.news-item .news-title {
  font-size: 1rem;
  margin: 2px 0 0;
}

.news-item .news-excerpt {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.5;
  margin-top: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-item .news-title a:hover {
  color: var(--primary);
}

/* ===== 内页 Banner ===== */
.page-banner {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  padding: 60px 0;
  color: #fff;
}

.page-banner-inner {
  text-align: center;
}

.page-banner-title {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.breadcrumb {
  font-size: 0.9rem;
  opacity: 0.85;
}

.breadcrumb a {
  color: #fff;
  transition: opacity var(--transition);
}

.breadcrumb a:hover {
  opacity: 0.7;
}

.breadcrumb-sep {
  margin: 0 8px;
  opacity: 0.6;
}

/* ===== 公司介绍页 ===== */
.about-page {
  background: var(--bg-light);
}

.about-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 30px;
  align-items: start;
}

.about-sidebar {
  position: sticky;
  top: calc(var(--topbar-height) + var(--header-height) + 20px);
}

.about-side-nav {
  background: var(--bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 20px;
}

.about-side-link {
  display: block;
  position: relative;
  padding: 16px 24px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  transition: color var(--transition), background var(--transition);
  overflow: hidden;
}

.about-side-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 0;
  background: var(--primary);
  border-radius: 0 2px 2px 0;
  transform: translateY(-50%);
  transition: height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.about-side-link:hover {
  color: var(--primary);
  background: rgba(41, 135, 186, 0.06);
}

.about-side-link:hover::before {
  height: 60%;
}

.about-side-link.active {
  color: var(--primary);
  background: rgba(41, 135, 186, 0.08);
  font-weight: 600;
}

.about-side-link.active::before {
  height: 60%;
  background: var(--primary);
}

/* 产品页侧边栏层级 */
.side-nav-parent {
  padding: 16px 24px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}

.product-side-groups {
  background: var(--bg);
}

.side-nav-accordion {
  border-bottom: 1px solid var(--border);
}

.side-nav-accordion:last-child {
  border-bottom: none;
}

.side-nav-accordion-head {
  display: flex;
  align-items: stretch;
  width: 100%;
  position: relative;
  overflow: hidden;
  transition: background var(--transition);
}

.side-nav-accordion-head::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 3px;
  height: 0;
  background: var(--primary);
  border-radius: 0 2px 2px 0;
  transform: translateY(-50%);
  transition: height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.side-nav-accordion-head:hover {
  background: rgba(41, 135, 186, 0.06);
}

.side-nav-accordion-head:hover::before {
  height: 60%;
}

.side-nav-accordion-head:hover .side-nav-accordion-link {
  color: var(--primary);
}

.side-nav-accordion-head:has(.side-nav-accordion-link.active),
.side-nav-accordion.open > .side-nav-accordion-head {
  background: rgba(41, 135, 186, 0.08);
}

.side-nav-accordion-head:has(.side-nav-accordion-link.active)::before,
.side-nav-accordion.open > .side-nav-accordion-head::before {
  height: 60%;
}

.side-nav-accordion-link {
  flex: 1;
  display: block;
  position: relative;
  padding: 16px 12px 16px 24px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  background: transparent;
  transition: color var(--transition);
}

.side-nav-accordion-link:hover {
  color: var(--primary);
}

.side-nav-accordion-link.active {
  color: var(--primary);
  font-weight: 600;
}

.side-nav-accordion-head .side-nav-accordion-link.about-side-link {
  background: transparent;
}

.side-nav-accordion-head .side-nav-accordion-link.about-side-link::before {
  display: none;
}

.side-nav-accordion-head .side-nav-accordion-link.about-side-link:hover,
.side-nav-accordion-head .side-nav-accordion-link.about-side-link.active {
  background: transparent;
}

.side-nav-accordion-head:hover .side-nav-accordion-link.about-side-link.active {
  color: var(--primary);
}

.side-nav-accordion-toggle-btn {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  align-self: stretch;
  padding: 0 20px 0 8px;
  border: none;
  background: transparent;
  cursor: pointer;
  font-family: inherit;
}

.side-nav-accordion-toggle {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 400;
  line-height: 1;
  color: var(--text-light);
  transition: color var(--transition);
}

.side-nav-accordion-toggle::before {
  content: "+";
}

.side-nav-accordion.open .side-nav-accordion-toggle {
  color: var(--primary);
}

.side-nav-accordion.open .side-nav-accordion-toggle::before {
  content: "−";
}

.side-nav-accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.product-side-nav--init .side-nav-accordion-body {
  transition: none;
}

.side-nav-accordion.open > .side-nav-accordion-body {
  max-height: 2400px;
  overflow: hidden;
}

.product-side-nav .side-nav-accordion.open > .side-nav-accordion-body {
  max-height: none;
}

.product-side-nav .side-nav-accordion-body {
  background: var(--bg-light);
  position: relative;
  padding: 2px 0 4px;
  border-top: 1px solid rgba(41, 135, 186, 0.08);
  transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.side-nav-child-link {
  padding: 14px 24px 14px 40px;
  font-size: 0.95rem;
  font-weight: 400;
  color: var(--text-light);
}

/* 产品页侧边栏 - 简约大气 */
.product-side-nav {
  background: var(--bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: 0 2px 16px rgba(41, 135, 186, 0.06);
  overflow: hidden;
}

.product-side-nav .side-nav-parent {
  padding: 18px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.02em;
  text-align: left;
  background: #2987BA;
  border-bottom: none;
}

/* 方案页侧边栏 - 与产品中心一致 */
.solution-side-nav {
  background: var(--bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: 0 2px 16px rgba(41, 135, 186, 0.06);
  overflow: hidden;
}

.solution-side-nav .side-nav-parent {
  padding: 18px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.02em;
  text-align: left;
  background: #2987BA;
  border-bottom: none;
}

/* 新闻页侧边栏 - 与方案页一致 */
.news-side-nav {
  background: var(--bg);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: 0 2px 16px rgba(41, 135, 186, 0.06);
  overflow: hidden;
}

.news-side-nav .side-nav-parent {
  padding: 18px 24px;
  font-size: 1.05rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.02em;
  text-align: left;
  background: #2987BA;
  border-bottom: none;
}

/* 新闻列表页 - 纯列表样式 */
.news-page .news-panel.active {
  animation: none;
}

.news-page-list {
  padding: 0;
}

.news-page-list .news-item {
  padding: 16px 0;
}

.news-page-list .news-item .news-title {
  font-size: 1.05rem;
}

.news-page-list .news-item .news-excerpt {
  -webkit-line-clamp: 2;
}

/* 新闻详情页 */
.news-detail-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.news-detail-category {
  display: inline-block;
  padding: 4px 12px;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--primary);
  background: rgba(41, 135, 186, 0.08);
  border-radius: 4px;
}

.news-detail-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-dark);
  line-height: 1.5;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
}

.news-detail-img {
  margin-bottom: 28px;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
}

.news-detail-img img {
  max-width: 100%;
  height: auto;
  display: block;
}

.news-detail-body {
  font-size: 1rem;
  color: var(--text);
  line-height: 2;
}

.news-detail-body p {
  margin-bottom: 20px;
  text-align: justify;
}

.news-detail-body p:last-child {
  margin-bottom: 0;
}

.news-detail-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 24px;
  margin-top: 36px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.news-detail-nav-links {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 8px;
  margin-left: auto;
}

.news-detail-back {
  font-size: 0.95rem;
  color: var(--primary);
  transition: color var(--transition);
}

.news-detail-back:hover {
  color: var(--accent);
}

.news-detail-prev,
.news-detail-next {
  font-size: 0.95rem;
  color: var(--text-light);
  transition: color var(--transition);
}

.news-detail-prev:hover,
.news-detail-next:hover {
  color: var(--primary);
}

/* 联系我们页 */
.contact-main {
  max-width: 100%;
}

.contact-info-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 36px;
}

.contact-info-item {
  text-align: center;
  padding: 28px 20px;
  background: var(--bg-light);
  border-radius: var(--radius-lg);
  transition: box-shadow var(--transition);
}

.contact-info-item:hover {
  box-shadow: var(--shadow);
}

.contact-info-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  margin-bottom: 14px;
  background: rgba(41, 135, 186, 0.1);
  border-radius: 50%;
  color: var(--primary);
}

.contact-info-icon .icon {
  width: 24px;
  height: 24px;
}

.contact-info-label {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
}

.contact-info-value {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.6;
}

.contact-info-value a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

.contact-info-value a:hover {
  color: var(--primary);
}

.contact-main-body {
  margin-top: 8px;
}

.product-side-nav .product-side-groups {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 5px;
  background: var(--bg-light);
}

.product-side-nav .side-nav-accordion {
  border-bottom: none;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg);
}

.product-side-nav .side-nav-accordion-head {
  position: relative;
  background: var(--bg);
  overflow: hidden;
  transition: background 0.25s ease;
}

.product-side-nav .side-nav-accordion-head::before {
  display: none;
}

.product-side-nav .side-nav-accordion-head:hover {
  background: var(--bg-light);
}

.product-side-nav .side-nav-accordion.open > .side-nav-accordion-head {
  background: rgba(41, 135, 186, 0.05);
  box-shadow: inset 3px 0 0 var(--primary);
}

.product-side-nav .side-nav-accordion.open > .side-nav-accordion-head:hover {
  background: rgba(41, 135, 186, 0.08);
}

.product-side-nav .side-nav-accordion-head:has(.side-nav-accordion-link.active) {
  background: var(--bg);
}

.product-side-nav .side-nav-accordion.open > .side-nav-accordion-head:has(.side-nav-accordion-link.active),
.product-side-nav .side-nav-accordion.open > .side-nav-accordion-head {
  background: rgba(41, 135, 186, 0.05);
  box-shadow: inset 3px 0 0 var(--primary);
}

.product-side-nav .side-nav-accordion-link {
  text-align: left;
  padding: 11px 48px 11px 24px;
  color: var(--text);
  font-size: 0.97rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  transition: color 0.25s ease;
}

.product-side-nav .side-nav-accordion-head:hover .side-nav-accordion-link {
  color: var(--primary);
}

.product-side-nav .side-nav-accordion.open .side-nav-accordion-link,
.product-side-nav .side-nav-accordion.open .side-nav-accordion-link.active,
.product-side-nav .side-nav-accordion.open > .side-nav-accordion-head:hover .side-nav-accordion-link {
  color: var(--primary);
  font-weight: 500;
}

.product-side-nav .side-nav-accordion-link.active {
  font-weight: 500;
}

.product-side-nav .side-nav-accordion-head .side-nav-accordion-link.about-side-link:hover,
.product-side-nav .side-nav-accordion-head .side-nav-accordion-link.about-side-link.active {
  background: transparent;
}

.product-side-nav .side-nav-accordion-toggle-btn {
  position: absolute;
  right: 0;
  top: 0;
  bottom: 0;
  width: 48px;
  padding: 0;
  background: transparent;
  opacity: 0.7;
  cursor: pointer;
  pointer-events: auto;
  z-index: 2;
  transition: opacity 0.25s ease;
}

.product-side-nav .side-nav-accordion-toggle-btn:hover {
  opacity: 1;
}

.product-side-nav .side-nav-accordion-toggle {
  width: 12px;
  height: 12px;
  color: var(--text-light);
  font-size: 0;
}

.product-side-nav .side-nav-accordion-toggle::before {
  content: "";
  display: block;
  width: 7px;
  height: 7px;
  margin: 0 auto;
  border-right: 1.5px solid currentColor;
  border-bottom: 1.5px solid currentColor;
  transform: rotate(45deg) translateY(-2px);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), color 0.25s ease;
}

.product-side-nav .side-nav-accordion.open .side-nav-accordion-toggle {
  color: var(--primary);
}

.product-side-nav .side-nav-accordion.open .side-nav-accordion-toggle::before {
  content: "";
  transform: rotate(-135deg) translateY(1px);
}

.product-side-nav .side-nav-accordion-body::before {
  display: none;
}

.product-side-nav .side-nav-child-link {
  position: relative;
  display: block;
  padding: 6px 24px 6px 44px;
  font-size: 0.85rem;
  font-weight: 400;
  color: #333;
  background: transparent;
  transition: color 0.25s ease, background 0.25s ease;
}

.product-side-nav .side-nav-child-link.about-side-link::before {
  display: block;
  left: 26px;
  top: 50%;
  width: 5px;
  height: 5px;
  background: #c5cdd3;
  border: none;
  border-radius: 50%;
  transform: translateY(-50%);
  transition: background 0.25s ease, width 0.25s ease, height 0.25s ease, left 0.25s ease, border-radius 0.25s ease;
}

.product-side-nav .side-nav-child-link.about-side-link:hover {
  color: var(--primary);
  background: rgba(41, 135, 186, 0.06);
}

.product-side-nav .side-nav-child-link.about-side-link:hover::before {
  background: var(--primary-light);
  width: 5px;
  height: 5px;
}

.product-side-nav .side-nav-child-link.about-side-link.active {
  color: var(--primary);
  font-weight: 400;
  background: rgba(41, 135, 186, 0.08);
}

.product-side-nav .side-nav-child-link.about-side-link.active::before {
  left: 24px;
  width: 3px;
  height: 14px;
  background: var(--primary);
  border-radius: 2px;
}

.about-side-contact {
  background: var(--bg);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.about-side-contact-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--primary);
}

.about-contact-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9rem;
  color: #444;
  line-height: 1.7;
  margin-bottom: 14px;
}

.about-contact-list li:last-child {
  margin-bottom: 0;
}

.about-contact-list .icon {
  margin-top: 3px;
  flex-shrink: 0;
  color: var(--primary);
}

.about-main {
  background: var(--bg);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.about-company-name {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--primary-dark);
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--border);
  line-height: 1.4;
}

.about-text {
  font-size: 1rem;
  color: var(--text);
  line-height: 2;
  margin-bottom: 20px;
  text-align: justify;
}

.about-text-highlight {
  color: var(--primary-dark);
  font-weight: 500;
  padding: 16px 20px;
  background: rgba(41, 135, 186, 0.06);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  margin-bottom: 0;
}

.partners-intro {
  margin-bottom: 28px;
  padding-bottom: 0;
  font-size: 0.875rem;
  color: #444;
}

.partners-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.partner-row {
  display: flex;
  gap: 24px;
  align-items: center;
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

.partner-row:first-child {
  padding-top: 0;
}

.partner-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.partner-row:hover {
  background: rgba(41, 135, 186, 0.03);
  margin: 0 -16px;
  padding-left: 16px;
  padding-right: 16px;
  border-radius: var(--radius);
}

.partner-row-img {
  flex-shrink: 0;
  width: 160px;
  height: 100px;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-light);
  display: grid;
  place-items: center;
  padding: 10px;
  box-sizing: border-box;
}

.partner-row-img img {
  display: block;
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  object-position: center center;
  margin: auto;
  transition: transform 0.4s ease;
}

.partner-row:hover .partner-row-img img {
  transform: scale(1.03);
}

.partner-row-body {
  flex: 1;
  min-width: 0;
}

.partner-row-name {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 8px;
}

.partner-row-desc {
  font-size: 0.8125rem;
  color: #444;
  line-height: 1.8;
}

/* ===== 帝国CMS 列表分页 ===== */
.pagelist,
.epages {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  text-align: center;
  line-height: 1;
}

.pagelist a,
.epages a,
.pagelist b,
.epages b {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 36px;
  height: 36px;
  padding: 0 10px;
  margin: 3px 2px;
  font-size: 0.875rem;
  font-weight: 400;
  border-radius: var(--radius);
  text-decoration: none;
  vertical-align: middle;
  box-sizing: border-box;
}

.pagelist a,
.epages a {
  color: var(--text);
  background: var(--bg-light);
  border: 1px solid var(--border);
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.pagelist a:hover,
.epages a:hover {
  color: var(--primary);
  border-color: var(--primary);
  background: rgba(41, 135, 186, 0.06);
}

.pagelist b,
.epages b,
.pagelist a.cur,
.epages a.cur {
  color: #fff;
  background: var(--primary);
  border: 1px solid var(--primary);
  font-weight: 600;
}

.pagelist select,
.epages select {
  min-width: 160px;
  height: 38px;
  padding: 0 32px 0 12px;
  font-size: 0.875rem;
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%237f8c8d' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E") no-repeat right 10px center;
  appearance: none;
  cursor: pointer;
  transition: border-color var(--transition);
}

.pagelist select:hover,
.pagelist select:focus,
.epages select:hover,
.epages select:focus {
  border-color: var(--primary);
  outline: none;
}

.pagelist #splitpage,
.epages #splitpage {
  display: inline-block;
}

.pagelist #splitpage ul,
.epages #splitpage ul {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 4px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.pagelist #splitpage li,
.epages #splitpage li {
  list-style: none;
}

.pagelist #splitpage li a,
.epages #splitpage li a,
.pagelist #splitpage li b,
.epages #splitpage li b {
  margin: 0;
}

.pagelist #splitpage span,
.epages #splitpage span {
  display: block;
  margin-bottom: 12px;
  font-size: 0.8125rem;
  color: var(--text-light);
}

/* ===== 方案列表页 ===== */
.solutions-page-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.solutions-page-grid .solution-item {
  border: 1px solid var(--border);
  box-shadow: 0 2px 12px rgba(41, 135, 186, 0.06);
}

.solutions-page-grid .solution-item:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(41, 135, 186, 0.1);
}

.solutions-page-grid .solution-desc {
  font-size: 0.8125rem;
  color: #444;
  line-height: 1.65;
  padding-bottom: 8px;
}

.solutions-page-grid .solution-img-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.solutions-page-grid .solution-title a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

.solutions-page-grid .solution-title a:hover {
  color: var(--primary);
}

/* ===== 产品列表页 ===== */
.products-main .about-company-name {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 20px;
  padding-bottom: 14px;
}

.products-page-grid {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.product-page-item {
  display: flex;
  gap: 20px;
  padding: 20px 0;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
  border-radius: 0;
  transition: background var(--transition);
}

.product-page-item:first-child {
  padding-top: 0;
}

.product-page-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.product-page-item:hover {
  transform: none;
  background: rgba(41, 135, 186, 0.03);
  margin: 0 -12px;
  padding-left: 12px;
  padding-right: 12px;
  border-radius: var(--radius);
}

.product-page-img {
  flex-shrink: 0;
  width: 180px;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-light);
  display: block;
  color: inherit;
  text-decoration: none;
}

.product-page-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.product-page-item:hover .product-page-img img {
  transform: scale(1.05);
}

.product-page-body {
  flex: 1;
  min-width: 0;
  padding: 4px 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.product-page-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary-dark);
  margin-bottom: 6px;
}

.product-page-name a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

.product-page-name a:hover {
  color: var(--primary);
}

.product-page-desc {
  font-size: 0.875rem;
  color: var(--text-light);
  line-height: 1.65;
  margin-bottom: 8px;
  max-width: 100%;
  white-space: normal;
  overflow-wrap: anywhere;
  word-break: break-all;
  line-break: anywhere;
}

.product-page-link {
  font-size: 0.875rem;
  color: var(--primary);
  font-weight: 500;
  transition: color var(--transition);
}

.product-page-link:hover {
  color: var(--primary-dark);
}

.product-page-item:target {
  outline: 2px solid var(--primary);
  outline-offset: 4px;
}

/* ===== 底部 ===== */
.footer {
  background: #000;
  color: rgba(255, 255, 255, 0.75);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.2rem;
  color: #fff;
  margin-bottom: 16px;
}

.footer-desc {
  font-size: 0.9rem;
  line-height: 1.8;
  opacity: 0.7;
}

.footer-title {
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  font-size: 0.9rem;
  opacity: 0.7;
  transition: all var(--transition);
}

.footer-links a:hover {
  opacity: 1;
  color: var(--accent);
  padding-left: 4px;
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 0.9rem;
  opacity: 0.7;
}

.footer-contact .icon {
  margin-top: 3px;
  opacity: 0.5;
}

.footer-bottom {
  padding: 20px 0;
  text-align: center;
  font-size: 0.85rem;
  opacity: 0.5;
}

.footer-bottom a:hover {
  color: var(--accent);
}

/* ===== 移动端固定咨询 ===== */
.mobile-consult-bar {
  display: none;
}

/* ===== 返回顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition);
  z-index: 999;
  box-shadow: var(--shadow);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-4px);
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

/* ===== 响应式 - 平板 ===== */
@media (max-width: 1024px) {
  .solutions-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .products-carousel {
    padding: 0 40px;
  }

  .product-card {
    flex: 0 0 calc((100% - 24px) / 2);
  }

  .partners-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

/* ===== 响应式 - 手机 ===== */
@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

  .top-bar-right {
    display: none;
  }

  .top-bar-left {
    gap: 16px;
  }

  .header {
    z-index: 1002;
  }

  .nav-toggle {
    display: flex;
    z-index: 1003;
    transition: opacity 0.2s ease, visibility 0.2s ease;
  }

  body.nav-open .nav-toggle {
    visibility: hidden;
    opacity: 0;
    pointer-events: none;
  }

  /* 遮罩层 */
  .nav-overlay {
    display: block;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.45);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
  }

  .nav-overlay.visible {
    opacity: 1;
    visibility: visible;
  }

  /* 侧滑抽屉导航 */
  .nav {
    position: fixed;
    top: 0;
    right: 0;
    width: min(320px, 86vw);
    height: 100vh;
    height: 100dvh;
    background: var(--bg);
    box-shadow: -8px 0 30px rgba(0, 0, 0, 0.15);
    z-index: 1001;
    transform: translateX(100%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    overflow-y: auto;
    overflow-x: hidden;
    -webkit-overflow-scrolling: touch;
    display: flex;
    flex-direction: column;
  }

  .nav.open {
    transform: translateX(0);
  }

  .nav-mobile-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 20px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    color: #fff;
    flex-shrink: 0;
    position: sticky;
    top: 0;
    z-index: 2;
  }

  .nav-mobile-title {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 1px;
  }

  .nav-close {
    width: 36px;
    height: 36px;
    border: none;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    color: #fff;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition);
  }

  .nav-close svg {
    width: 18px;
    height: 18px;
  }

  .nav-close:active {
    background: rgba(255, 255, 255, 0.3);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    padding: 8px 0 24px;
    gap: 0;
    flex: 1;
  }

  .nav-item {
    border-bottom: 1px solid var(--border);
  }

  .nav-item:last-child {
    border-bottom: none;
    margin-top: 8px;
    padding: 0 16px;
  }

  .nav-link {
    display: block;
    width: 100%;
    padding: 22px 20px;
    font-size: 1rem;
    border-radius: 0;
  }

  .nav-link-contact {
    text-align: center;
    background: var(--primary);
    color: #fff !important;
    border-radius: var(--radius);
    padding: 18px 20px;
    font-weight: 600;
  }

  .nav-link-contact:active {
    background: var(--primary-dark);
  }

  .nav-link-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 0 12px 0 0;
    border-radius: 0;
    gap: 4px;
  }

  .nav-link-text {
    flex: 1;
    padding: 22px 8px 22px 20px;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text);
  }

  .nav-item.active > .nav-link:not(.nav-link-contact),
  .nav-item.active .nav-link-text {
    color: var(--primary);
    background: rgba(41, 135, 186, 0.08);
    font-weight: 600;
  }

  .nav-item.active > .nav-link.nav-link-contact {
    background: var(--primary-dark);
    color: #fff !important;
  }

  .dropdown li a.active {
    color: var(--primary);
    background: rgba(41, 135, 186, 0.06);
    font-weight: 600;
  }

  .submenu-toggle {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    cursor: pointer;
    pointer-events: auto;
    color: var(--text-light);
    transition: all var(--transition);
  }

  .submenu-toggle .arrow {
    width: 18px;
    height: 18px;
  }

  .has-dropdown.open .submenu-toggle {
    color: var(--primary);
    background: rgba(41, 135, 186, 0.06);
  }

  .has-dropdown.open .submenu-toggle .arrow {
    transform: rotate(180deg);
  }

  .has-dropdown .dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    background: var(--bg-light);
    border-radius: 0;
    margin: 0;
    padding: 0;
    min-width: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }

  .has-dropdown.open .dropdown {
    max-height: 280px;
  }

  .has-dropdown:hover .dropdown {
    transform: none;
  }

  .dropdown li a {
    display: block;
    padding: 18px 20px 18px 36px;
    font-size: 0.95rem;
    color: var(--text-light);
    border-left: 3px solid transparent;
    transition: all var(--transition);
  }

  .dropdown li a:active,
  .dropdown li a:hover {
    color: var(--primary);
    background: rgba(41, 135, 186, 0.08);
    border-left-color: var(--primary);
    padding-left: 36px;
  }

  body.nav-open {
    overflow: hidden;
  }

  .mobile-consult-bar {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 999;
    height: 48px;
    padding-bottom: env(safe-area-inset-bottom, 0);
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    box-shadow: 0 -4px 16px rgba(30, 111, 150, 0.25);
  }

  .mobile-consult-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 100%;
    font-size: 0.9375rem;
    font-weight: 600;
    color: #fff;
    text-decoration: none;
    transition: background var(--transition);
  }

  .mobile-consult-btn svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
  }

  .mobile-consult-tel {
    background: rgba(0, 0, 0, 0.12);
    border-right: 1px solid rgba(255, 255, 255, 0.2);
  }

  .mobile-consult-tel:active {
    background: rgba(0, 0, 0, 0.2);
  }

  .mobile-consult-primary {
    background: var(--accent);
  }

  .mobile-consult-primary:active {
    background: #e8912a;
  }

  body {
    padding-bottom: calc(48px + env(safe-area-inset-bottom, 0));
  }

  .back-to-top {
    bottom: calc(68px + env(safe-area-inset-bottom, 0));
  }

  .banner {
    height: 420px;
  }

  .banner-title {
    font-size: 1.8rem;
  }

  .banner-desc {
    font-size: 1.05rem;
  }

  .banner-arrow {
    width: 36px;
    height: 36px;
  }

  .banner-prev { left: 10px; }
  .banner-next { right: 10px; }

  .section {
    padding: 50px 0;
  }

  .section-title {
    font-size: 1.5rem;
  }

  .solutions-grid {
    grid-template-columns: 1fr;
  }

  .products-carousel {
    padding: 0 36px;
  }

  .product-card {
    flex: 0 0 100%;
  }

  .products-arrow {
    width: 36px;
    height: 36px;
  }

  .products-arrow svg {
    width: 18px;
    height: 18px;
  }

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

  .news-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .page-banner {
    padding: 40px 0;
  }

  .page-banner-title {
    font-size: 1.6rem;
  }

  .about-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .about-sidebar {
    position: static;
  }

  .about-layout:has(a.product-page-img) .about-side-contact {
    display: none;
  }

  .about-side-nav {
    display: flex;
    margin-bottom: 16px;
  }

  .product-side-nav {
    display: block;
  }

  .solution-side-nav {
    display: block;
  }

  .news-side-nav {
    display: block;
  }

  .product-side-nav .side-nav-parent {
    padding: 16px 20px;
    font-size: 1rem;
  }

  .solution-side-nav .side-nav-parent {
    padding: 16px 20px;
    font-size: 1rem;
  }

  .news-side-nav .side-nav-parent {
    padding: 16px 20px;
    font-size: 1rem;
  }

  .product-side-nav .side-nav-accordion-link {
    flex: 1;
    display: block;
    width: auto;
    text-align: left;
    padding: 10px 44px 10px 20px;
  }

  .product-side-nav .side-nav-accordion-head::before {
    display: none;
  }

  .product-side-nav .side-nav-accordion-toggle-btn {
    width: 44px;
  }

  .product-side-nav .side-nav-child-link {
    flex: none;
    display: block;
    width: 100%;
    text-align: left;
    padding: 5px 20px 5px 40px;
  }

  .product-side-nav .side-nav-child-link.about-side-link::before {
    left: 24px;
  }

  .product-side-nav .side-nav-child-link.about-side-link.active::before {
    left: 22px;
  }

  .about-side-link {
    flex: 1;
    text-align: center;
    padding: 14px 16px;
  }

  .about-side-link::before {
    top: auto;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    transform: translateX(-50%);
    border-radius: 2px 2px 0 0;
    transition: width 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .about-side-link:hover::before {
    width: 50%;
    height: 3px;
  }

  .about-side-link.active::before {
    width: 50%;
    height: 3px;
  }

  .about-main {
    padding: 20px;
  }

  .contact-info-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .partner-row {
    flex-direction: column;
    gap: 16px;
    padding: 20px 0;
  }

  .partner-row:hover {
    margin: 0;
    padding-left: 0;
    padding-right: 0;
  }

  .partner-row-img {
    width: 100%;
    height: 120px;
    aspect-ratio: auto;
    display: grid;
    place-items: center;
    padding: 12px;
  }

  .pagelist a,
  .epages a,
  .pagelist b,
  .epages b {
    min-width: 32px;
    height: 32px;
    padding: 0 8px;
    font-size: 0.8125rem;
  }

  .about-company-name {
    font-size: 1.3rem;
  }

  .products-main .about-company-name {
    font-size: 1.15rem;
    margin-bottom: 16px;
    padding-bottom: 12px;
  }

  .products-page-grid {
    gap: 0;
  }

  .solutions-page-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .product-page-item {
    flex-direction: column;
    gap: 12px;
    padding: 16px 0;
  }

  .product-page-item:hover {
    margin: 0 -8px;
    padding-left: 8px;
    padding-right: 8px;
  }

  .product-page-img {
    width: 100%;
    aspect-ratio: 4 / 3;
  }

  .product-page-body {
    padding: 0;
  }
}

@media (max-width: 480px) {
  .top-bar-left .top-bar-item:last-child {
    display: none;
  }

  .banner {
    height: 360px;
  }

  .banner-title {
    font-size: 1.5rem;
  }

  .solution-title {
    padding: 20px 20px 14px;
    font-size: 1rem;
  }

  .solution-desc {
    padding: 16px 20px 0;
  }

  .solution-link {
    padding: 14px 20px 20px;
  }

  .partners-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
}