/* ========== css/icons.css ========== */
/* =====================================================
 * 自定义图标样式 - 替代 bootstrap-icons.min.css
 * 仅包含项目中实际使用的 19 个图标
 * 体积: ~3KB (vs bootstrap-icons.min.css 84KB)
 * ===================================================== */

.bi {
    display: inline-block;
    font-style: normal;
    font-variant: normal;
    text-rendering: auto;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    line-height: 1;
    vertical-align: middle;
    font-weight: normal;
    speak: none;
}

/* 箭头类 - 使用 CSS border 绘制，无需字体 */
.bi-chevron-right::before {
    content: '';
    display: inline-block;
    width: 0.45em;
    height: 0.45em;
    border-top: 2px solid currentColor;
    border-right: 2px solid currentColor;
    transform: rotate(45deg);
    vertical-align: middle;
    position: relative;
    top: -1px;
}

.icon_search, .icon_language {
    width: 1.2em;
    height: 1.2em;
    fill: #fff;
}

.navbar-search svg,
.navbar-lang svg {
    width: 18px;
    height: 18px;
    fill: #fff;
}

.nav-item-space{
    letter-spacing: 6px;
}

.dropdown-label{
  letter-spacing: 0;
}

/* .site-footer{
  border-top: 1px solid rgba(255, 255, 255, 0.8);
} */

.bi-chevron-down::before {
    content: '';
    display: inline-block;
    width: 0.45em;
    height: 0.45em;
    border-right: 2px solid currentColor;
    border-bottom: 2px solid currentColor;
    transform: rotate(45deg);
    vertical-align: middle;
}

.bi-chevron-left::before {
    content: '';
    display: inline-block;
    width: 0.45em;
    height: 0.45em;
    border-top: 2px solid currentColor;
    border-left: 2px solid currentColor;
    transform: rotate(-45deg);
    vertical-align: middle;
}

.bi-arrow-left::before {
    content: '';
    display: inline-block;
    width: 0.6em;
    height: 0.6em;
    border-top: 2px solid currentColor;
    border-left: 2px solid currentColor;
    transform: rotate(-45deg);
    vertical-align: middle;
}

.bi-arrow-clockwise::before {
    content: '↻';
    font-size: 1.1em;
}

/* 关闭按钮 */
.bi-x-lg::before {
    content: '×';
    font-weight: 300;
    font-size: 1em;
    line-height: 0.8;
}

/* 通用符号 - 使用 Unicode */

/* .bi-molecules::before { content: '⚛'; font-size: 1.1em; } */
/* .bi-flame::before { content: '🔥'; font-size: 1em; } */
/* .bi-ruler::before { content: '📏'; font-size: 1em; } */
/* .bi-border-all::before { content: '▦'; font-size: 1.1em; } */
.bi-lock::before { content: '🔒'; font-size: 1em; }
.bi-person::before { content: '👤'; font-size: 1em; }
.bi-shield-check::before { content: '🛡'; font-size: 1em; }
.bi-exclamation-triangle-fill::before { content: '⚠'; font-size: 1.1em; }

/* ========== css/main.css ========== */
/* ============================================================
   main.css - 企业门户网站基础样式
   描述：全局基础样式、CSS变量、字体、重置样式、排版
   适用范围：所有页面（PC端 + 移动端）
   ============================================================ */



/* ========== CSS 自定义变量（设计令牌） ========== */
:root {
  /* 品牌色 */
  --primary: #005BBB;
  --primary-rgb: 0, 91, 187;
  --primary-light: #3388D0;
  --primary-lighter: #E6F0FA;
  --primary-dark: #004A99;

  /* 中性色 */
  --dark: #333333;
  --dark-light: #666666;
  --gray: #999999;
  --gray-light: #CCCCCC;
  --gray-lighter: #F5F5F5;
  --white: #FFFFFF;
  --gray-white: #f9fbfc;

  /* 功能色 */
  --success: #28A745;
  --warning: #FFC107;
  --danger: #DC3545;
  --info: #17A2B8;

  /* 设计令牌 */
  --radius: 9px;
  --radius-sm: 6px;
  --radius-lg: 12px;
  --radius-round: 50%;

  /* 阴影 */
  --shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.15);
  --shadow-card: 0 4px 15px rgba(0, 0, 0, 0.06);
  --shadow-btn: 0 6px 20px rgba(0, 91, 187, 0.3);

  /* 过渡 */
  --transition: all 0.3s ease;
  --transition-slow: all 0.5s ease;

  /* 字体 */
  --font-cn: 'Source Han Sans CN', 'Microsoft Yahei', 'Noto Sans S Chinese Light', 'Microsoft YaHei Light', 'Pingfang sc regular', 'Helvetica Neue', 'Helvetica', 'Tahoma', 'sans-serif';
  --font-en: 'Montserrat', 'Helvetica Neue', Arial, sans-serif;

  /* 间距 */
  --section-padding: 80px 0 0 0;
  /* --container-max: 1200px; */
}

/* ========== CSS Reset / Normalize ========== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-cn);
  color: var(--dark);
  line-height: 1.75;
  background-color: var(--white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========== 排版 Typography ========== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-cn);
  font-weight: 700;
  line-height: 1.4;
  color: var(--dark);
  margin-bottom: 0.5em;
}

h1 { font-size: 2.5rem; }
/* h2 { font-size: 1rem; } */
h3 { font-size: 1rem; }
h4 { font-size: 1.5rem; }
h5 { font-size: 1.25rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: 0;
  color: var(--dark-light);
  line-height: 1.75;
}

/* 英文专用字体 */
.en-font,
.english-text,
.brand-name {
  font-family: var(--font-en);
}

/* 数字使用英文字体 */
.num,
.number {
  font-family: var(--font-en);
  font-weight: 600;
}

/* ========== 容器与区块 ========== */
.container {
  width: 1520px;
  /* max-width: calc(100vw * 0.88); */
  margin: 0 auto;
  padding-left: 0;
  padding-right: 0;
}

@media (max-width: 1600px) {
    .container {
        width: 79%;
    }
}
@media (max-width: 1450px) {
    .container {
        width: 88%;
    }
}
@media (max-width: 996px) {
    .container {
        width: 90%;
    }
}

.container-fluid {
  width: 100%;
  padding-left: 15px;
  padding-right: 15px;
}

section,
.section {
  padding: var(--section-padding);
  position: relative;
}

.title-hero{
    opacity: 0.9; letter-spacing: 2px; font-size: 48px; color: white;
    font-weight: 700;
}

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

.section-header h2 {
  /* font-size: 2.2rem; */
  color: var(--dark);
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
}

/* 标题下方装饰线 - 全站统一为蓝渐变（h2 / h3 共用） */
.section-header h2::after,
.section-header h3::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  /* background: linear-gradient(90deg, #005293, #0098dc); */
  background-color: var(--primary);
  margin: 12px auto 0;
  border-radius: 2px;
}

/* 首页 page-title-bar 统一为纯色 */
.page-title-bar {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: #005BBB;
  margin: 10px auto 0;
  border-radius: 2px;
}

/* banner 内的 page-title-bar 不显示（蓝条只在 section-header 区域显示） */
.page-banner .banner-content .page-title-bar {
  display: none;
}

/* 首页 h2 标题（带 #0a193c 内联颜色）与下方蓝条间距统一为 10px */
/* 必须使用 !important 覆盖 Bootstrap mb-2 类的 !important */
h2[style*="#0a193c"] {
  margin-bottom: 10px !important;
}

/* page-banner 内的 h1 标题不显示蓝条（统一间距为 12px，banner 标题已通过 section-header 模式处理） */

.section-header p {
  font-size: 1.05rem;
  color: var(--gray);
  max-width: 600px;
  margin: 0 auto;
}

/* 区块背景变体 */
.section-gray {
  background-color: var(--gray-lighter);
}

.section-primary-light {
  background-color: var(--primary-lighter);
}

.section-dark {
  background-color: var(--dark);
  color: var(--white);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4,
.section-dark h5,
.section-dark h6 {
  color: var(--white);
}

.section-dark p {
  color: rgba(255, 255, 255, 0.75);
}

/* ========== 链接样式 ========== */
a {
  color: default var(--primary);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: var(--primary-dark);
  text-decoration: none;
}

/* a:focus {
  outline: 2px solid var(--white);
  outline-offset: 2px;
} */

/* 链接下划线动画 */
.link-underline {
  position: relative;
}

.link-underline::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -2px;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
  transform: translateX(-50%);
}

.link-underline:hover::after {
  width: 100%;
}

/* ========== 图片 ========== */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ========== 列表 ========== */
ul, ol {
  list-style: none;
  padding: 0;
  margin: 0;
}

/* ========== 辅助工具类 ========== */
.text-primary { color: var(--primary) !important; }
.text-dark { color: var(--dark) !important; }
.text-white { color: var(--white) !important; margin-bottom: 40px; }
.text-gray { color: var(--gray) !important; }

.bg-primary { background-color: var(--primary) !important; }
.bg-dark { background-color: var(--dark) !important; }
.bg-white { background-color: var(--white) !important; }
.bg-gray-lighter { background-color: var(--gray-lighter) !important; }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.font-en { font-family: var(--font-en); }
.font-cn { font-family: var(--font-cn); }

/* 间距工具类 */
.mt-10 { margin-top: 10px; }
.mt-20 { margin-top: 20px; }
.mt-30 { margin-top: 30px; }
.mt-50 { margin-top: 50px; }
.mb-10 { margin-bottom: 10px; }
.mb-20 { margin-bottom: 20px; }
.mb-30 { margin-bottom: 30px; }
.mb-50 { margin-bottom: 50px; }
.pt-50 { padding-top: 50px; }
.pb-50 { padding-bottom: 50px; }

/* 隐藏/显示 */
.d-none { display: none !important; }
.d-block { display: block !important; }
.d-flex { display: flex !important; }

/* 浮动清除 */
.clearfix::after {
  content: '';
  display: table;
  clear: both;
}

/* 无障碍 - 屏幕阅读器专用 */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ========== 页面加载淡入动画 ========== */
/* @keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in-up {
  animation: fadeInUp 0.6s ease forwards;
} */

/* 延迟动画类 */
.fade-in-up-delay-1 { animation-delay: 0.1s; opacity: 0; }
.fade-in-up-delay-2 { animation-delay: 0.2s; opacity: 0; }
.fade-in-up-delay-3 { animation-delay: 0.3s; opacity: 0; }
.fade-in-up-delay-4 { animation-delay: 0.4s; opacity: 0; }
.fade-in-up-delay-5 { animation-delay: 0.5s; opacity: 0; }

/* ========== 选中文本颜色 ========== */
::selection {
  background: var(--primary);
  color: var(--white);
}

::-moz-selection {
  background: var(--primary);
  color: var(--white);
}

/* ========== 滚动条美化 ========== */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--gray-lighter);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb {
  background: var(--gray-light);
  border-radius: 4px;
  transition: var(--transition);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--gray);
}

/* ============================================================
   一、导航栏 Navbar（固定顶部，透明 ↔ 白色切换，悬停延展子菜单）
   ============================================================ */

/* 导航栏基础容器 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  height: 100px;
  padding: 0 60px;
  background: transparent;
  transition: 0.35s ease, 
              box-shadow 0.35s ease;
  font-family: var(--font-cn);
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  flex-wrap: nowrap;
  padding: 0;
  max-width: 100%;
  height: 100px;
  transition: height 0.4s cubic-bezier(0.25, 0.8, 0.25, 1.2);
  overflow: hidden;
}

/* ---- 默认状态：页面顶部透明 ---- */
.navbar.navbar-transparent {
  background: transparent;
}

.navbar.navbar-transparent .navbar-brand {
  color: #ffffff;
}

.navbar.navbar-transparent .nav-link {
  color: #ffffff;
}

.navbar.navbar-transparent .navbar-toggler {
  border-color: rgba(255, 255, 255, 0.5);
}

.navbar.navbar-transparent .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255,255,255,0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.navbar.navbar-transparent .cls-1 {
    fill: white;
}

/* ---- 滚动后状态：白色背景 ---- */
.navbar.navbar-scrolled {
  background: #ffffff;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
  height: 100px;
}

.navbar.navbar-scrolled .navbar-brand {
  color: rgb(0, 91, 187);
}

.navbar.navbar-scrolled .nav-link {
  color: #333333;
  font-weight: bold;
}

.navbar.navbar-scrolled .navbar-toggler {
  border-color: rgba(0, 91, 187, 0.3);
}

.navbar.navbar-scrolled .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(0,91,187,0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.navbar.navbar-scrolled .cls-1 {
    fill: rgb(0, 91, 187);
}

/* ---- 鼠标悬停导航栏（页面顶部时）：触发白色背景状态 + 展开高度 ---- */
.navbar.navbar-transparent:hover {
  background: #ffffff;
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
  transition: background-color 0.4s ease;
}

.navbar.navbar-transparent:hover .navbar-brand {
  color: rgb(0, 91, 187);
}

.navbar.navbar-transparent:hover .nav-link {
  color: #333333;
}

.navbar.navbar-transparent:hover .navbar-toggler {
  border-color: rgba(0, 91, 187, 0.3);
}

.navbar.navbar-transparent:hover .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(0,91,187,0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

.navbar.navbar-transparent:hover .cls-1 {
    fill: rgb(0, 91, 187);
}

/* 导航栏悬停展开效果：保持高度不变，二级菜单在下方展开 */
/* .navbar:hover {
  height: 100px;
}

.navbar:hover .container {
  height: 100px;
} */

/* ---- 品牌名称/Logo ---- */
.navbar-brand {
  font-family: var(--font-cn);
  font-size: 0;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: 1px;
  transition: all 0.3s ease;
  display: block;
  align-items: center;
  gap: 0.77rem;
  transition: gap 0.77s ease, all 0.3s ease;
  line-height: 1;
}

.navbar-brand .brand-text {
  font-family: var(--font-cn);
  font-weight: 700;
  letter-spacing: 2px;
}

.navbar-brand .brand-sub {
  font-family: var(--font-cn);
  font-size: 1rem;
  font-weight: 700;
  opacity: 0.85;
}

.navbar-brand img {
  height: 40px;
  width: auto;
}

/* ---- 导航栏右侧操作区：搜索 + 语言 ---- */
.navbar-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  margin-left: auto;
  min-width: 0;
  max-width: 300px;
}

.navbar-search {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.08);
  transition: all 0.3s ease;
  cursor: pointer;
}

.navbar-search i {
  font-size: 0.9rem;
  color: #fff;
  transition: color 0.3s ease;
}

.navbar-search .search-input {
  border: none;
  background: transparent;
  outline: none;
  color: #fff;
  font-size: 16px;
  width: 80px;
  max-width: 120px;
  transition: width 0.3s ease;
}

.navbar-search .search-input::placeholder {
  color: rgba(255, 255, 255, 0.6);
}

.navbar-search:focus-within {
  border-color: rgba(255, 255, 255, 0.5);
  background: rgba(255, 255, 255, 0.12);
}

.navbar-lang {
  display: none;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.08);
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 0.85rem;
  color: #fff;
  white-space: nowrap;
}

.navbar-lang i {
  font-size: 0.95rem;
}

.navbar-lang:hover {
  border-color: transparent;
  background: transparent;
}

/* 滚动后状态：白色背景 */
.navbar.navbar-scrolled .navbar-search {
  border-color: rgba(0, 0, 0, 0.15);
}

.navbar.navbar-scrolled .navbar-search i,
.navbar.navbar-scrolled .navbar-search .search-input,
.navbar.navbar-scrolled .navbar-lang,
.navbar.navbar-scrolled .navbar-lang i {
  color: #333;
}

.navbar.navbar-scrolled .navbar-search svg,
.navbar.navbar-scrolled .navbar-lang svg{
  fill: #333;
}

.navbar.navbar-scrolled .navbar-search .search-input::placeholder {
  color: rgba(51, 51, 51, 0.5);
}

.navbar.navbar-scrolled .navbar-lang {
  border-color: transparent;
  background: transparent;
  color: #333;
}

/* 悬停状态：白色背景 */
.navbar.navbar-transparent:hover .navbar-search {
  border-color: rgba(0, 0, 0, 0.15);
  background: rgba(0, 0, 0, 0.04);
}

.navbar.navbar-transparent:hover .navbar-search i,
.navbar.navbar-transparent:hover .navbar-search .search-input,
.navbar.navbar-transparent:hover .navbar-lang,
.navbar.navbar-transparent:hover .navbar-lang i {
  color: #333;
}

.navbar.navbar-transparent:hover .navbar-search svg,
.navbar.navbar-transparent:hover .navbar-lang svg{
  fill: #333;
}



.navbar.navbar-transparent:hover .navbar-search .search-input::placeholder {
  color: rgba(51, 51, 51, 0.5);
}

.navbar.navbar-transparent:hover .navbar-lang {
  border-color: transparent;
  background: transparent;
  color: #333;
}

@media (max-width: 991px) {
  .navbar-actions {
    display: none;
  }
}

/* ---- 导航链接：垂直居中，两侧对齐 ---- */
.navbar-nav {
  display: flex;
  align-items: center;
  flex: 1;
  justify-content: center;
  height: 100%;
  margin: 0;
  padding: 0;
}

.nav-item {
  display: inline-flex;
  align-items: flex-start;
  flex-shrink: 1;
  flex-grow: 0;
  text-decoration: none;
  height: 100%;
  align-items: center;
  justify-content: center;
  min-width: 60px;
  max-width: 90px;
  margin: 0 0.5rem;
}

.nav-link {
  display: flex;
  align-items: center;
  /* padding: 10px 16px; */
  font-size: 18px;
  font-weight: 500;
  text-decoration: none;
  transition: all 0.3s ease;
  position: relative;
  white-space: nowrap;
  line-height: 1;
  height: 100%;
}

/* 导航链接 —— 品牌色下划线从中心向两侧展开动画 */
.nav-link::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 6px;
  width: 0;
  height: 2px;
  background: #005BBB;
  transition: all 0.3s ease;
  transform: translateX(-50%);
  border-radius: 1px;
}

.nav-link:hover::after,
.nav-link.active::after {
  width: calc(100% - 32px);
}

/* .nav-link:hover,
.nav-link.active {
  color: #005BBB !important;
} */

/* 确保鼠标悬停二级菜单时，一级菜单悬停样式保持不变 */
.nav-item:hover .nav-link::after {
  width: calc(100% - 32px);
}

/* .nav-item:hover .nav-link {
  color: #005BBB !important;
} */

/* ============================================================
   二级下拉菜单：横向布局，图标在上，文字在下
   ============================================================ */

/* 下拉菜单容器 —— 紧靠一级菜单，横向扩展
   出现：向下从 0 高度延展；消失：向上收缩至 0 高度。
   收缩过程中鼠标移入二级菜单区域即可恢复展开（dmenu 为 nav-item 子元素，保持 pointer-events 可触发 hover）。 */
.nav-item .dmenu {
  /* display: flex; */
  position: absolute;
  top: 99px;
  left: 50%;
  width: 100vw;
  transform: translateX(-50%);
  background: #ffffff;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  /* 收缩态：高度先收缩，opacity 延迟淡出，保证收缩过程内容可见 */
  transition: max-height 0.3s cubic-bezier(0, 0, 1, 1),
              opacity 0.2s ease 0.3s;
  z-index: 9999;
  border: none;
}

/* 鼠标悬停一级菜单时显示二级菜单 —— 高度向下延展 */
.nav-item:hover .dmenu {
  max-height: 200px;
  opacity: 1;
  /* 展开态：opacity 先快速出现，高度向下延展 */
  transition: max-height 0.3s cubic-bezier(0, 0, 1, 1),
              opacity 0.2s ease;
}

/* 下拉菜单内容横向布局 */
.dmenu .dmenu-item-grid {
  display: flex;
  /* flex-direction: row;
  flex-wrap: nowrap;
  gap: 25px; */
  align-items: center;
  justify-content: center;
}

/* 下拉菜单项 —— 图标在上，文字在下 */
.dmenu .dmenu-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 12px 18px;
  font-size: 17px;
  color: #333333;
  text-decoration: none;
  transition: all 0.3s ease;
  border-radius: var(--radius);
  gap: 2px;
  background: transparent;
  min-width: 220px;
  height: 148px;
}

/* 下拉菜单图标 */
.dmenu .dmenu-item .dropdown-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 53px;
    height: 53px;
    background: transparent;
    border-radius: 50%;
    font-size: 1.3rem;
  color: #005BBB;
  transition: all 0.3s ease;
  overflow: hidden;
  position: relative;
}

.dmenu .dmenu-item .dropdown-icon img {
  width: 53px;
  height: 53px;
  object-fit: contain;
}

/* 图标堆叠：默认显示黑色，hover时蓝色从下方滑入 */
.icon-stack {
  display: block;
  position: relative;
  width: 53px;
  height: 53px;
  overflow: hidden;
}
.icon-stack img {
  position: absolute;
  top: 0;
  left: 0;
  width: 53px;
  height: 53px;
  object-fit: contain;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.icon-stack .icon-black {
  transform: translateY(0);
  z-index: 2;
}
.icon-stack .icon-blue {
  transform: translateY(100%);
  z-index: 1;
}
.dmenu-item:hover .icon-stack .icon-black {
  transform: translateY(-100%);
}
.dmenu-item:hover .icon-stack .icon-blue {
  transform: translateY(0);
}

/* 通用自定义图标样式 */
.icon-blue,
.icon-black {
  display: inline-block;
  vertical-align: middle;
  object-fit: contain;
  flex-shrink: 0;
}

/* 导航下拉图标 - 默认蓝色 */
.icon-nav {
  width: 53px;
  height: 53px;
}

/* 卡片图标 - 默认蓝色 */
.icon-card {
  width: 53px;
  height: 53px;
}

/* 信息项图标 - 默认蓝色 */
.icon-info {
  width: 53px;
  height: 53px;
}

/* 移动端菜单图标 */
.mobile-item-icon .icon-blue {
  width: 53px;
  height: 53px;
}

/* 鼠标悬停菜单项时的效果 */
.dmenu .dmenu-item:hover .dropdown-icon {
  background: rgba(0, 91, 187, 0.08);
  transform: translateY(-3px);
}

.dmenu .dmenu-item:hover .dropdown-icon {
    background: transparent;
    color: #005BBB;
    transform: none;
}

.dmenu .dmenu-item:hover .dropdown-icon img {
  filter: none;
}
.dmenu .dmenu-item:hover .dropdown-label {
  color: #005BBB;
}

/* 下拉菜单文字标签 */
.dmenu .dmenu-item .dropdown-label {
  font-weight: 500;
  line-height: 1.2;
}

/* ---- Hero区域链接悬停下划线效果 ---- */
.hero-link {
  position: relative;
  text-decoration: none;
}
.hero-link:hover {
  color: white;
}
.hero-link::after {
    content: "";
    position: absolute;
    height: 1px;
    color: white;
    transition: all 0.5s;
    left: 0;
    bottom: 0;
    width: 0;
    background: white;
    /* transition: transform 0.5s ease; */
}
.hero-link:hover::after {
    width: 100%;
}

/* ---- 导航栏折叠按钮 ---- */
.navbar-toggler {
  border: 1px solid transparent;
  padding: 6px 10px;
  border-radius: var(--radius);
  transition: all 0.3s ease;
  cursor: pointer;
  display: none;
}

.navbar-toggler:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(0, 91, 187, 0.2);
}

.navbar-toggler-icon {
  display: inline-block;
  width: 24px;
  height: 24px;
  vertical-align: middle;
  background-size: 100% 100%;
}

/* ---- 移动端菜单覆盖层 ---- */
.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  z-index: 9999;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.mobile-menu-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-menu-content {
  position: absolute;
  top: 0;
  right: 0;
  width: 85%;
  max-width: 320px;
  height: 100%;
  background: #ffffff;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
  display: flex;
  flex-direction: column;
  box-shadow: -8px 0 30px rgba(0, 0, 0, 0.1);
}

.mobile-menu-overlay.active .mobile-menu-content {
  transform: translateX(0);
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 20px 16px;
  border-bottom: 1px solid #f0f0f0;
  background: #ffffff;
}

.mobile-brand {
  font-size: 1.4rem;
  font-weight: 700;
  color: #005BBB;
  font-family: 'Source Han Sans CN Bold', sans-serif;
}

.mobile-menu-close {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: none;
  background: transparent;
  color: #333;
  font-size: 1.3rem;
  cursor: pointer;
  border-radius: 50%;
  transition: 0.2s ease;
}

.mobile-menu-close:hover,
.mobile-menu-close:active {
  background: #f5f5f5;
}

.mobile-menu-items {
  flex: 1;
  overflow-y: auto;
  padding: 10px 0;
}

.mobile-menu-item {
  display: flex;
  align-items: center;
  padding: 16px 20px;
  color: #333333;
  text-decoration: none;
  font-size: 16px;
  font-weight: 500;
  border-bottom: 1px solid #f8f8f8;
  transition: 0.2s ease;
}

.mobile-menu-item:hover,
.mobile-menu-item:active {
  background: #f5f9ff;
}

.mobile-item-icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 12px;
  color: #005BBB;
  font-size: 1.1rem;
}

.mobile-item-icon img.icon-blue {
  width: 22px;
  height: 22px;
  object-fit: contain;
}

.mobile-item-arrow {
  margin-left: auto;
  font-size: 0.85rem;
  color: #999;
  transition: transform 0.2s ease;
}

.mobile-menu-item.active .mobile-item-arrow {
  transform: rotate(90deg);
}

.mobile-submenu {
  display: none;
  background: #fafafa;
}

.mobile-submenu.show {
  display: block;
}

.mobile-submenu a {
  display: block;
  padding: 14px 20px 14px 60px;
  color: #666666;
  text-decoration: none;
  font-size: 15px;
  border-bottom: 1px solid #f0f0f0;
  transition: 0.2s ease;
}

.mobile-submenu a:hover,
.mobile-submenu a:active {
  background: #f5f9ff;
  color: #005BBB;
}

@media (min-width: 991px) {
  .mobile-menu-overlay {
    display: none;
  }
}

/* ============================================================
   二、按钮样式
   ============================================================ */

.btn {
  display: inline-block;
  font-family: var(--font-cn);
  font-weight: 500;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  user-select: none;
  border: 2px solid transparent;
  padding: 12px 28px;
  font-size: 0.95rem;
  line-height: 1.5;
  border-radius: var(--radius);
  transition: all 0.3s ease;
  text-decoration: none;
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

/* 主要按钮 */
.btn-primary {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

.btn-primary:hover,
.btn-primary:focus {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: var(--white);
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 25px rgba(0, 91, 187, 0.35);
}

.btn-primary:active {
  transform: translateY(-1px) scale(1.02);
}

/* 次要按钮 */
.btn-secondary {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}

.btn-secondary:hover,
.btn-secondary:focus {
  background: var(--primary);
  color: var(--white);
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 25px rgba(0, 91, 187, 0.25);
}

/* 白色轮廓按钮（用于深色背景/Hero） */
.btn-outline-white {
  background: transparent;
  color: var(--white);
  border-color: var(--white);
}

.btn-outline-white:hover,
.btn-outline-white:focus {
  background: var(--white);
  color: var(--primary);
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 25px rgba(255, 255, 255, 0.3);
}

/* 深色轮廓按钮 */
.btn-outline-dark {
  background: transparent;
  color: var(--dark);
  border-color: var(--dark);
}

.btn-outline-dark:hover,
.btn-outline-dark:focus {
  background: var(--dark);
  color: var(--white);
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 25px rgba(51, 51, 51, 0.3);
}

/* 按钮大小变体 */
.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
}

/* 禁用状态 */
.btn:disabled,
.btn.disabled {
  opacity: 0.6;
  cursor: not-allowed;
  pointer-events: none;
}

/* 按钮组 */
.btn-group {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

/* ============================================================
   三、卡片样式
   ============================================================ */

.card-link-wrapper {
    display: block;
    text-decoration: none;
    color: inherit;
}
.card-link-wrapper:hover .card {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(0,0,0,0.12);
}

.card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  /* transition: all 0.3s ease; */
  border: none;
}

/* .card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
} */

.card-img-top {
  /* height: 280px; */
  width: 100%;
  object-fit: cover;
}

.card-body {
  padding: 25px;
}

.card-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--dark);
}

.card-text {
  font-size: 0.9rem;
  color: var(--dark-light);
  line-height: 1.6;
}

.card-footer {
  padding: 15px 25px;
  background: var(--gray-lighter);
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  font-size: 0.85rem;
  color: var(--gray);
}

/* 卡片网格 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.card-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.card-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 25px;
}

/* ============================================================
   四-A、首页硅部件 3D 互动展示
   ============================================================ */
.si-showcase-hint {
  color: #6c7a8d;
  font-size: 0.95rem;
  margin-top: 14px;
}

/* 各子区域子标题（硅部件产品 / 碳化硅部件产品）：移到椭圆光晕顶部上方 */
.si-showcase-caption,
.sic-showcase-caption {
  text-align: center;
  font-weight: 700;
  color: var(--dark-light);
  letter-spacing: 2px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translateX(-50%);
  margin: 0;
  padding: 0;
  z-index: 6;
  white-space: nowrap;
  transition: opacity 0.4s ease, transform 0.4s ease;
}
.si-showcase-caption a:hover,
.sic-showcase-caption a:hover {
  color: var(--dark-light);
}

/* 列容器相对定位，供标题与光晕定位 */
.si-showcase-section .row > [class*="col-"] {
  position: relative;
  padding: 0;
  min-width: 500px;
}

/* 悬停展开时，标题消失 */
.si-product-stage.is-spread ~ .si-showcase-caption,
.sic-product-stage.is-spread ~ .sic-showcase-caption {
  display: none;
  transform: translateX(-50%) translateY(-10px);
}

/* 椭圆形光晕（括号形状）：只显示椭圆左右两端弧形，中间透明 */
.si-product-stage::before,
.sic-product-stage::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 540px;
  height: 340px;
  margin-left: -270px;
  margin-top: -170px;
  border-radius: 50%;
  border: 2px solid #dee2e6;
  background: radial-gradient(ellipse at center, rgba(0, 91, 187, 0.12) 0%, rgba(0, 91, 187, 0.04) 45%, transparent 75%);
  box-shadow:
    0 0 36px rgba(0, 91, 187, 0.22),
    inset 0 0 36px rgba(0, 91, 187, 0.10);
  pointer-events: none;
  z-index: 0;
  -webkit-mask-image: linear-gradient(to right,
    #000 0%, #000 15%,
    transparent 15%, transparent 85%,
    #000 85%, #000 100%);
  mask-image: linear-gradient(to right,
    #000 0%, #000 15%,
    transparent 15%, transparent 85%,
    #000 85%, #000 100%);
  transition: transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1),
              /* border-color 0.7s ease, */
              box-shadow 0.7s ease,
              opacity 0.1s ease;
}

/* 悬停展开：椭圆光晕向两侧扩展，边框与光晕增强 */
.si-product-stage.is-spread::before,
.sic-product-stage.is-spread::before {
  transform: scaleX(1.2);
  border-color: rgba(0, 91, 187, 0.3);
  box-shadow:
    0 0 60px rgba(0, 91, 187, 0.36),
    inset 0 0 50px rgba(0, 91, 187, 0.16);
}

/* 悬停时，椭圆光晕消失，突出当前产品 */
.si-product-stage:hover::before,
.sic-product-stage:hover::before {
  opacity: 0;
}

/* 收缩态淡化蒙层：罩住产品形成半透明效果，展开后消失 */
.si-product-stage::after,
.sic-product-stage::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.55);
  pointer-events: none;
  z-index: 6;
  opacity: 1;
  transition: opacity 0.5s ease;
}

/* 展开态：蒙层消失，产品完全可见 */
.si-product-stage.is-spread::after,
.sic-product-stage.is-spread::after {
  opacity: 0;
}

/* 悬停某个产品时，蒙层同步消失，避免 3D 翻转卡片被 2D 蒙层遮挡 */
.si-product-stage:has(.si-product-item:hover)::after,
.sic-product-stage:has(.sic-product-item:hover)::after {
  opacity: 0;
}

.si-product-stage,
.sic-product-stage {
  position: relative;
  width: 100%;
  height: 460px;
  margin-top: 40px;
  background: transparent;
  border-radius: 0;
  overflow: visible;
  perspective: 1400px;
  cursor: pointer;
  z-index: 1;
}

/* 展开态提升层级，避免被相邻舞台的光晕遮挡 */
.si-product-stage.is-spread,
.sic-product-stage.is-spread {
  z-index: 2;
}

.si-product-item,
.sic-product-item {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 160px;
  height: 220px;
  margin-left: -80px;
  margin-top: -110px;
  transform-style: preserve-3d;
  transition: transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1), z-index 0s 0.35s;
  z-index: 1;
}

/* 堆叠态：5 个产品水平排列，相邻产品约 1/3 区域重叠 */
.si-product-item:nth-child(1),
.sic-product-item:nth-child(1) { transform: translate(-160px, 0) rotate(0deg) scale(0.85); }
.si-product-item:nth-child(2),
.sic-product-item:nth-child(2) { transform: translate(-80px, 0) rotate(0deg) scale(0.85); }
.si-product-item:nth-child(3),
.sic-product-item:nth-child(3) { transform: translate(0, 0) rotate(0deg) scale(0.85); }
.si-product-item:nth-child(4),
.sic-product-item:nth-child(4) { transform: translate(80px, 0) rotate(0deg) scale(0.85); }
.si-product-item:nth-child(5),
.sic-product-item:nth-child(5) { transform: translate(160px, 0) rotate(0deg) scale(0.85); }

/* 悬停展开态：保持图片大小与堆叠态一致，仅水平位移形成铺开效果 */
.si-product-stage.is-spread .si-product-item,
.sic-product-stage.is-spread .sic-product-item {
  transform-origin: center center;
}
.si-product-stage.is-spread .si-product-item:nth-child(1),
.sic-product-stage.is-spread .sic-product-item:nth-child(1) { transform: translate(-260px, 0) scale(0.85); }
.si-product-stage.is-spread .si-product-item:nth-child(2),
.sic-product-stage.is-spread .sic-product-item:nth-child(2) { transform: translate(-130px, 0) scale(0.85); }
.si-product-stage.is-spread .si-product-item:nth-child(3),
.sic-product-stage.is-spread .sic-product-item:nth-child(3) { transform: translate(0, 0) scale(0.85); }
.si-product-stage.is-spread .si-product-item:nth-child(4),
.sic-product-stage.is-spread .sic-product-item:nth-child(4) { transform: translate(130px, 0) scale(0.85); }
.si-product-stage.is-spread .si-product-item:nth-child(5),
.sic-product-stage.is-spread .sic-product-item:nth-child(5) { transform: translate(260px, 0) scale(0.85); }

/* .si-product-stage.is-spread .si-product-item:nth-child(1),
.sic-product-stage.is-spread .sic-product-item:nth-child(1) { z-index: 5; }
.si-product-stage.is-spread .si-product-item:nth-child(2),
.sic-product-stage.is-spread .sic-product-item:nth-child(2) { z-index: 4; }
.si-product-stage.is-spread .si-product-item:nth-child(3),
.sic-product-stage.is-spread .sic-product-item:nth-child(3) { z-index: 6; }
.si-product-stage.is-spread .si-product-item:nth-child(4),
.sic-product-stage.is-spread .sic-product-item:nth-child(4) { z-index: 4; }
.si-product-stage.is-spread .si-product-item:nth-child(5),
.sic-product-stage.is-spread .sic-product-item:nth-child(5) { z-index: 5; } */

/* 堆叠态层级：让中间的产品在最上层 */
.si-product-item:nth-child(1),
.sic-product-item:nth-child(1) { z-index: 3; }
.si-product-item:nth-child(2),
.sic-product-item:nth-child(2) { z-index: 4; }
.si-product-item:nth-child(3),
.sic-product-item:nth-child(3) { z-index: 5; }
.si-product-item:nth-child(4),
.sic-product-item:nth-child(4) { z-index: 4; }
.si-product-item:nth-child(5),
.sic-product-item:nth-child(5) { z-index: 3; }

.si-product-card,
.sic-product-card {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.8s cubic-bezier(0.4, 0.2, 0.2, 1);
  border-radius: 0;
  box-shadow: none;
  background: transparent;
}

.si-product-item:hover .si-product-card,
.sic-product-item:hover .sic-product-card {
  transform: rotateY(180deg);
  z-index: 10;
}

.align-items-stretch {
    justify-content: center;
}

/* 为产品卡片轮廓添加悬停阴影 - 使用 drop-shadow 让阴影跟随产品实际形状 */
.si-product-face,
.sic-product-face {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: 0;
  overflow: visible;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
}

.si-product-face img,
.sic-product-face img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  user-select: none;
  pointer-events: none;
  transition: filter 0.4s ease;
}

.si-product-item:hover .si-product-face img,
.sic-product-item:hover .sic-product-face img {
  transform: scale(1.2);
  filter:
    drop-shadow(0 0 8px rgba(0, 91, 187, 0.55))
    drop-shadow(0 0 10px rgba(0, 91, 187, 0.4))
    drop-shadow(0 0 16px rgba(0, 91, 187, 0.25));
}

.si-product-item:hover,
.sic-product-item:hover {
  z-index: 10;
  transition: transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1), z-index 0s;
}

.si-product-back,
.sic-product-back {
  transform: rotateY(180deg);
  background: transparent;
}

.si-product-label,
.sic-product-label {
  position: absolute;
  left: 50%;
  bottom: -50px;
  transform: translateX(-50%);
  background: rgba(0, 91, 187, 0.92);
  color: #fff;
  font-size: 16px;
  padding: 5px 14px;
  border-radius: 999px;
  white-space: nowrap;
  opacity: 0;
  transition: opacity 0.35s ease, transform 0.35s ease;
  pointer-events: none;
  letter-spacing: 1px;
}

.si-product-stage.is-spread .si-product-item:hover .si-product-label,
.sic-product-stage.is-spread .sic-product-item:hover .sic-product-label,
.si-product-item:hover .si-product-label,
.sic-product-item:hover .sic-product-label {
  opacity: 1;
  transform: translateX(-50%) translateY(-4px);
}

/* .si-product-stage::after,
.sic-product-stage::after {
  content: '悬停展开 · 旋转查看正反面';
  position: absolute;
  left: 50%;
  bottom: 18px;
  transform: translateX(-50%);
  color: #94a3b8;
  font-size: 0.82rem;
  letter-spacing: 2px;
  pointer-events: none;
  transition: opacity 0.4s ease;
  display: none;
} */

/* .si-product-stage.is-spread::after,
.sic-product-stage.is-spread::after {
  opacity: 0;
} */

/* 半宽布局：缩小产品尺寸与展开距离，保证两列并存时不互相挤压 */
@media (min-width: 1200px) and (max-width: 1600px) {
  .product-showcase-col .si-product-stage,
  .product-showcase-col .sic-product-stage {
    height: 380px;
    margin-top: 32px;
  }
  /* 半宽列下椭圆光晕尺寸收缩 */
  .product-showcase-col .si-product-stage::before,
  .product-showcase-col .sic-product-stage::before {
    width: 500px;
    height: 300px;
    margin-left: -250px;
    margin-top: -150px;
  }
  .product-showcase-col .si-product-stage .si-product-item,
  .product-showcase-col .sic-product-stage .sic-product-item {
    width: 140px;
    height: 180px;
    margin-left: -70px;
    margin-top: -90px;
  }
  /* 堆叠态：相邻产品约 1/3 区域重叠 */
  .product-showcase-col .si-product-stage .si-product-item:nth-child(1),
  .product-showcase-col .sic-product-stage .sic-product-item:nth-child(1) { transform: translate(-160px, 0) rotate(0deg) scale(0.85); }
  .product-showcase-col .si-product-stage .si-product-item:nth-child(2),
  .product-showcase-col .sic-product-stage .sic-product-item:nth-child(2) { transform: translate(-80px, 0) rotate(0deg) scale(0.85); }
  .product-showcase-col .si-product-stage .si-product-item:nth-child(3),
  .product-showcase-col .sic-product-stage .sic-product-item:nth-child(3) { transform: translate(0, 0) rotate(0deg) scale(0.85); }
  .product-showcase-col .si-product-stage .si-product-item:nth-child(4),
  .product-showcase-col .sic-product-stage .sic-product-item:nth-child(4) { transform: translate(80px, 0) rotate(0deg) scale(0.85); }
  .product-showcase-col .si-product-stage .si-product-item:nth-child(5),
  .product-showcase-col .sic-product-stage .sic-product-item:nth-child(5) { transform: translate(160px, 0) rotate(0deg) scale(0.85); }
  /* 悬停展开态：保持图片大小一致，水平铺开 */
  .product-showcase-col .si-product-stage.is-spread .si-product-item,
  .product-showcase-col .sic-product-stage.is-spread .sic-product-item {
    transform-origin: center center;
  }
  .product-showcase-col .si-product-stage.is-spread .si-product-item:nth-child(1),
  .product-showcase-col .sic-product-stage.is-spread .sic-product-item:nth-child(1) { transform: translate(-260px, 0) scale(0.85); }
  .product-showcase-col .si-product-stage.is-spread .si-product-item:nth-child(2),
  .product-showcase-col .sic-product-stage.is-spread .sic-product-item:nth-child(2) { transform: translate(-130px, 0) scale(0.85); }
  .product-showcase-col .si-product-stage.is-spread .si-product-item:nth-child(3),
  .product-showcase-col .sic-product-stage.is-spread .sic-product-item:nth-child(3) { transform: translate(0, 0) scale(0.85); }
  .product-showcase-col .si-product-stage.is-spread .si-product-item:nth-child(4),
  .product-showcase-col .sic-product-stage.is-spread .sic-product-item:nth-child(4) { transform: translate(130px, 0) scale(0.85); }
  .product-showcase-col .si-product-stage.is-spread .si-product-item:nth-child(5),
  .product-showcase-col .sic-product-stage.is-spread .sic-product-item:nth-child(5) { transform: translate(260px, 0) scale(0.85); }
}

/* 平板（769-1200px）：垂直堆叠两个产品块，保留桌面端效果 */
@media (max-width: 1200px) {
  .product-showcase-flex {
    flex-direction: column;
    gap: 32px;
  }
  .si-product-stage,
  .sic-product-stage { height: 380px; margin-top: 28px; }
  .si-product-stage::before,
  .sic-product-stage::before {
    width: 500px;
    height: 300px;
    margin-left: -250px;
    margin-top: -150px;
  }
  .si-product-item,
  .sic-product-item {
    width: 140px;
    height: 180px;
    margin-left: -70px;
    margin-top: -90px;
  }
  /* 堆叠态：相邻产品约 1/3 区域重叠 */
  .si-product-item:nth-child(1),
  .sic-product-item:nth-child(1) { transform: translate(-160px, 0) rotate(0deg) scale(0.85); }
  .si-product-item:nth-child(2),
  .sic-product-item:nth-child(2) { transform: translate(-80px, 0) rotate(0deg) scale(0.85); }
  .si-product-item:nth-child(3),
  .sic-product-item:nth-child(3) { transform: translate(0, 0) rotate(0deg) scale(0.85); }
  .si-product-item:nth-child(4),
  .sic-product-item:nth-child(4) { transform: translate(80px, 0) rotate(0deg) scale(0.85); }
  .si-product-item:nth-child(5),
  .sic-product-item:nth-child(5) { transform: translate(160px, 0) rotate(0deg) scale(0.85); }
  /* 悬停展开态 */
  .si-product-stage.is-spread .si-product-item,
  .sic-product-stage.is-spread .sic-product-item {
    transform-origin: center center;
  }
  .si-product-stage.is-spread .si-product-item:nth-child(1),
  .sic-product-stage.is-spread .sic-product-item:nth-child(1) { transform: translate(-260px, 0) scale(0.85); }
  .si-product-stage.is-spread .si-product-item:nth-child(2),
  .sic-product-stage.is-spread .sic-product-item:nth-child(2) { transform: translate(-130px, 0) scale(0.85); }
  .si-product-stage.is-spread .si-product-item:nth-child(3),
  .sic-product-stage.is-spread .sic-product-item:nth-child(3) { transform: translate(0, 0) scale(0.85); }
  .si-product-stage.is-spread .si-product-item:nth-child(4),
  .sic-product-stage.is-spread .sic-product-item:nth-child(4) { transform: translate(130px, 0) scale(0.85); }
  .si-product-stage.is-spread .si-product-item:nth-child(5),
  .sic-product-stage.is-spread .sic-product-item:nth-child(5) { transform: translate(260px, 0) scale(0.85); }
}

/* 移动端：两个产品块垂直堆叠（2行），禁用 3D 旋转与展开效果 */
@media (max-width: 768px) {
  .product-showcase-flex {
    flex-direction: column;
    gap: 32px;
  }
  .si-product-stage,
  .sic-product-stage {
    height: 280px;
    perspective: 1200px;
    padding: 0;
    margin-top: 0;
  }
  /* 移动端：光晕尺寸缩小适配，与电脑端保持一致效果 */
  .si-product-stage::before,
  .sic-product-stage::before {
    width: 400px;
    height: 260px;
    margin-left: -200px;
    margin-top: -130px;
    transition: none;
  }
  .si-product-stage::after,
  .sic-product-stage::after {
    transition: none;
  }
  /* 标题居中显示在 stage 上方 */
  .si-showcase-caption,
  .sic-showcase-caption {
    margin: 0 0 12px 0;
  }

  /* 产品尺寸缩小适配移动端，保持桌面端收拢排列样式 */
  .si-product-item,
  .sic-product-item {
    width: 140px;
    height: 180px;
    margin-left: -70px;
    margin-top: -90px;
    transition: none !important;
  }
  /* 收拢态 translate 间距缩小，!important 锁定防止 is-spread 展开（静态展示） */
  .si-product-item:nth-child(1),
  .sic-product-item:nth-child(1) { transform: translate(-120px, 0) scale(0.85) !important; z-index: 3 !important; }
  .si-product-item:nth-child(2),
  .sic-product-item:nth-child(2) { transform: translate(-60px, 0) scale(0.85) !important; z-index: 4 !important; }
  .si-product-item:nth-child(3),
  .sic-product-item:nth-child(3) { transform: translate(0, 0) scale(0.85) !important; z-index: 5 !important; }
  .si-product-item:nth-child(4),
  .sic-product-item:nth-child(4) { transform: translate(60px, 0) scale(0.85) !important; z-index: 4 !important; }
  .si-product-item:nth-child(5),
  .sic-product-item:nth-child(5) { transform: translate(120px, 0) scale(0.85) !important; z-index: 3 !important; }
  /* 禁用悬停翻转、图片光效、z-index 提升 */
  .si-product-item:hover .si-product-card,
  .sic-product-item:hover .sic-product-card { transform: none; }
  .si-product-item:hover .si-product-face img,
  .sic-product-item:hover .sic-product-face img {
    transform: none;
    filter: none;
  }
  .si-product-item:hover,
  .sic-product-item:hover {
    z-index: auto;
    transition: none;
  }
  /* 光晕：stage 区域悬停时不消失 */
  .si-product-stage:hover::before,
  .sic-product-stage:hover::before {
    opacity: 1;
  }
  /* 产品标签：始终隐藏，悬停也不显示，无动画 */
  .si-product-label,
  .sic-product-label,
  .si-product-item:hover .si-product-label,
  .sic-product-item:hover .sic-product-label {
    opacity: 0;
    left: 90%;
    bottom: 40%;
    transition: none;
  }
  /* 蒙层：悬停时也不消失，保持淡化遮盖 */
  .si-product-stage:has(.si-product-item:hover)::after,
  .sic-product-stage:has(.sic-product-item:hover)::after {
    opacity: 1;
  }
  /* 光晕：悬停时也不消失，保持静态展示 */
  .si-product-stage:has(.si-product-item:hover)::before,
  .sic-product-stage:has(.sic-product-item:hover)::before {
    opacity: 1;
  }
  /* 禁用标题动画 */
  .si-showcase-caption,
  .sic-showcase-caption {
    transition: none;
  }
  /* is-spread 在移动端不生效，保持静态展示 */
  .si-product-stage.is-spread::before,
  .sic-product-stage.is-spread::before {
    transform: none;
    border-color: rgba(0, 91, 187, 0.45);
    box-shadow:
      0 0 36px rgba(0, 91, 187, 0.22),
      inset 0 0 36px rgba(0, 91, 187, 0.10);
  }
  .si-product-stage.is-spread::after,
  .sic-product-stage.is-spread::after {
    opacity: 1;
  }
  .product-showcase-col:has(.si-product-stage.is-spread) .si-showcase-caption,
  .product-showcase-col:has(.sic-product-stage.is-spread) .sic-showcase-caption {
    opacity: 1;
    transform: none;
  }
  .si-showcase-hint { font-size: 0.82rem; }
}

/* ============================================================
   四、产品卡片
   ============================================================ */

.product-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow:
    0 0 24px rgba(0, 91, 187, 0.35),
    0 0 48px rgba(0, 91, 187, 0.2),
    0 8px 30px rgba(0, 91, 187, 0.18);
}

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

.product-card .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-card .product-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

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

.product-card .product-desc {
  font-size: 0.88rem;
  color: var(--dark-light);
  flex: 1;
  margin-bottom: 15px;
}

.product-card .product-link {
  align-self: flex-start;
  font-weight: 600;
  color: var(--primary);
  font-size: 0.9rem;
}

/* 产品网格 */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.rd-content {
  font-size: 20px;
  line-height: 1.6;
  /* padding: 50px 141px 0 90px; */
  /* color: var(--dark); */
}

/* 首页技术能力展示块 */
.rd-showcase-section {
  background-color: var(--gray-white);
  padding: 0;
  overflow: hidden;
}

.rd-showcase-image {
  position: relative;
  min-height: 480px;
  overflow: hidden;
}

.rd-showcase-image img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.rd-showcase-content {
  background-image: url('../images/element-05.png');
  background-size: 10rem 10rem;
  background-repeat: no-repeat;
  background-position: right 0 bottom 0;
  /* display: flex; */
  align-content: center;
  justify-content: center;
  padding: 0 3rem;
  position: relative;
  border-top: 2rem solid rgba(192, 195, 214, 0.3);
  border-bottom: 2rem solid rgba(192, 195, 214, 0.3);
}

.rd-showcase-content::before {
  /* content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 25%;
  height: 25%;
  background: rgba(248, 249, 251, 0.6);
  pointer-events: none; */
}

.rd-showcase-inner {
  max-width: 600px;
  padding: 0 40px 0 60px;
  position: relative;
  z-index: 1;
}

.rd-showcase-content p {
  /* font-size: 20px; */
  line-height: 1.8;
  color: #4a5568;
  margin-bottom: 18px;
}
.new-more-btn{
  margin-top: 10px;
}
.rd-showcase-content .btn-primary ,.new-more-btn .btn-primary{
  background: #005BBB;
  color: #fff;
  border: none;
  padding: 10px 32px;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-block;
  border-radius: 30px;
}

.rd-showcase-content .btn-primary:hover ,.new-more-btn .btn-primary:hover{
  background: #004599;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0,91,187,0.25);
  color: #fff;
}

@media (max-width: 1024px) {
  .rd-showcase-image {
    min-height: 320px;
  }
  .rd-showcase-content {
    padding: 50px 20px;
  }
  .rd-showcase-inner {
    padding: 0 10px;
    text-align: center;
  }
}

/* ============================================================
   五、新闻/资讯卡片
   ============================================================ */

.news-card {
  display: flex;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: all 0.3s ease;
  border: none;
}

.news-card:hover {
  transform: translateY(-5px) !important;
  box-shadow: var(--shadow-hover);
}

.news-card .news-img {
  flex: 0 0 280px;
  overflow: hidden;
}

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

.news-card:hover .news-img img {
  transform: scale(1.05);
}

.news-card .news-body {
  flex: 1;
  padding: 25px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.news-card .news-date {
  font-family: var(--font-en);
  font-size: 0.8rem;
  color: var(--gray);
  margin-bottom: 8px;
}

.news-card .news-title {
  font-size: 14px;
  font-weight: bold;
  color: var(--dark);
  margin-bottom: 10px;
  line-height: 1.5;
  height: 42px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card .news-excerpt {
  font-size: 12px;
  color: var(--dark-light);
  line-height: 1.6;
  height: 4.32rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 新闻列表 */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 25px;
}

.latest-news-card {
  border: none;
  box-shadow: 0 4px 20px rgba(0,0,0,0.08);
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.latest-news-card-link {
  text-decoration: none;
  color: inherit;
  display: block;
}
.latest-news-card-link:hover {
  text-decoration: none;
  color: inherit;
}
.latest-news-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}
.latest-news-card img {
  height: 200px;
  object-fit: cover;
}
.latest-news-card .card-body {
  padding: 20px;
}
.latest-news-card .card-title {
  font-weight: bold;
  color: #0a193c;
  font-size: 16px;
  margin-bottom: 8px;
  line-height: 1.5;
  height: 48px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.latest-news-card .card-text {
  color: #666;
  font-size: 14px;
  line-height: 1.6;
  height: 68px;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.latest-news-card .card-date {
  color: #999;
  font-size: 11px;
  display: flex;
  align-items: center;
}
.latest-news-card .card-date i {
  margin-right: 6px;
}

/* ============================================================
   六、Hero / 横幅 Banner（首页）
   ============================================================ */

.hero-section {
  position: relative;
  height: 100vh;
  max-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  /* background: #005BBB;   */
  /* 视频加载前的占位背景色 */
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: 0;
  transition: opacity 0.6s ease;
}

.hero-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
  transition: opacity 0.6s ease;
}

.hero-video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* Hero 媒体切换器：左下角横条 */
.hero-media-switcher {
  position: absolute;
  bottom: 5%;
  left: 5%;
  transform: none;
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 10px;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border-radius: 0;
  border: none;
  box-shadow: none;
}

/* 横条指示器容器 */
.media-indicators {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 10px;
}

/* 横条（可点击切换） */
.media-bar {
  width: 60px;
  height: 4px;
  border-radius: 2px;
  border: none;
  background: rgba(255, 255, 255, 0.35);
  cursor: pointer;
  pointer-events: auto;
  padding: 0;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  outline: none;
  position: relative;
  overflow: hidden;
}
.media-bar::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, #005BBB 0%, #0098dc 100%);
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.media-bar:hover {
  background: rgba(255, 255, 255, 0.55);
}
.media-bar.active {
  width: 60px;
  background: transparent;
  box-shadow: 0 0 8px rgba(0, 152, 220, 0.4);
}
.media-bar.active::before {
  transform: scaleX(1);
}

/* 右边横条（图片）：从左向右展开 */
#heroBarImage::before {
  transform-origin: left center;
}

/* 左边横条（视频）：从右向左展开 */
#heroBarVideo::before {
  transform-origin: right center;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  /* background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 400"><path fill="rgba(255,255,255,0.03)" d="M0,320L60,304C120,288,240,256,360,240C480,224,600,224,720,234.7C840,245,960,267,1080,261.3C1200,256,1320,224,1380,208L1440,192L1440,400L1380,400C1320,400,1200,400,1080,400C960,400,840,400,720,400C600,400,480,400,360,400C240,400,120,400,60,400L0,400Z"/></svg>') no-repeat bottom; */
  /* background-size: cover; */
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  color: var(--white);
  max-width: 650px;
}

.hero-content h1 {
  font-size: 3rem;
  font-weight: 800;
  color: var(--white);
  margin-bottom: 20px;
  line-height: 1.2;
}

.hero-content p {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 35px;
  line-height: 1.8;
}

.hero-content .btn-group {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
}

/* Hero 科技感粒子/网格背景 */
.hero-dots {
  position: absolute;
  top: 0;
  right: 0;
  width: 50%;
  height: 100%;
  background-image: radial-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
  opacity: 0.6;
}

.hero-illustration {
  position: absolute;
  right: 5%;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
  max-width: 45%;
}

.hero-illustration img {
  max-width: 100%;
}

/* 滚动指示器 */
.scroll-indicator {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
}

.scroll-indicator .mouse {
  width: 26px;
  height: 40px;
  border: 2px solid rgba(255, 255, 255, 0.6);
  border-radius: 13px;
  position: relative;
}

.scroll-indicator .mouse::after {
  content: '';
  width: 4px;
  height: 8px;
  background: var(--white);
  border-radius: 2px;
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  animation: scrollWheel 1.5s ease infinite;
}

@keyframes scrollWheel {
  0% { top: 8px; opacity: 1; }
  100% { top: 22px; opacity: 0; }
}

/* ============================================================
   七、表单输入框
   ============================================================ */

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--dark);
}

.form-control {
  display: block;
  width: 100%;
  padding: 12px 16px;
  font-size: 0.95rem;
  font-family: var(--font-cn);
  line-height: 1.5;
  color: var(--dark);
  background: var(--white);
  border: 1px solid var(--gray-light);
  border-radius: var(--radius);
  transition: all 0.3s ease;
  outline: none;
}

.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0, 91, 187, 0.1);
}

.form-control::placeholder {
  color: var(--gray);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23333' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M2 5l6 6 6-6'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 14px;
  padding-right: 40px;
}

/* 服务表单样式 */
.service-form {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 40px;
}

.service-form .form-title {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 30px;
  color: var(--dark);
}

.service-form .form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.service-form .form-row-full {
  grid-column: 1 / -1;
}

/* ============================================================
   八、页脚
   ============================================================ */

.footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 60px 0 0;
}

@media (max-width: 767px) {
  .service-request-form { padding: 24px 20px; }
  .form-section-title { font-size: 1.5rem; }
  .form-section-desc { font-size: 0.9rem; margin-bottom: 24px; }
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}

.footer-col h4 {
  color: var(--white);
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 10px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 30px;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
}

.footer-col p {
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.88rem;
  line-height: 1.8;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: #666666;
  /* font-size: 17px; */
  transition: all 0.3s ease;
  text-decoration: none;
  position: relative;
  padding-left: 0;
}

.footer-links a:hover {
  color: #005BBB;
  padding-left: 8px;
}

.footer-title {
  display: inline-block;
  color: #000000;
  /* font-size: 18px; */
  font-weight: bold;
  margin-bottom: 15px;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-title:hover {
  color: #005BBB;
}

.footer-brand {
  display: block;
  margin-bottom: 10px;
  text-align: center;
}

.footer-brand svg {
  /* height: 60px; */
  width: 120px;
  display: inline-block;
}

.footer-brand svg .cls-1{
  fill: #005BBB;
}

.footer-desc {
  color: #666666;
  font-size: 0.88rem;
  line-height: 1.8;
  margin-bottom: 0;
}

.footer-desc .dropdown {
  display: block;                /* 改为 block，方便子元素计算宽度 */
  position: relative;            /* 关键：让 dropdown-menu 的 absolute 定位以本元素为参照 */
  width: 76%;
  margin: 0 auto;
}
.footer-desc .dropdown > button {
  font-size: 14px;
  color: #666666;
  padding: 8px 16px;
  border-radius: 6px;
  background-color: #f5f5f5;
  border: 1px solid #e5e7eb;
  width: 100%;
  display: block;                /* 让 button 占满父容器宽度 */
}
.footer-desc .dropdown > button:hover,
.footer-desc .dropdown > button:focus {
  background-color: #eaeaea;
  border-color: #d4d4d8;
}
/* 友情链接下拉箭头点击后翻转（chevron-down → chevron-up） */
.footer-desc .dropdown > button .bi-chevron-down {
  display: inline-block;
  transition: transform 0.25s ease;
}
.footer-desc .dropdown > button[aria-expanded="true"] .bi-chevron-down {
  transform: rotate(180deg);
}
.footer-desc .dropdown .dropdown-menu {
  width: 100%;                   /* 100% of .dropdown (with position: relative) */
  min-width: 100%;               /* 覆盖 Bootstrap 的 min-width */
  max-width: 100%;
  margin-top: 4px;
  padding: 0;
  border-radius: 9px;
  border: 1px solid #e5e7eb;
  left: 0;                       /* 强制左对齐 */
  right: auto;
  transform: none;               /* 移除 Bootstrap 的居中 transform */
}
.footer-desc .dropdown .dropdown-item {
  font-size: 14px;
  padding: 8px 18px;
  width: 100%;                   /* 撑满 dropdown-menu */
  text-align: center;
  white-space: nowrap;
  background-color: #f5f5f5;
  border-radius: 9px;
  color: #333;
  transition: background-color 0.2s;
  display: block;
}
.footer-desc .dropdown .dropdown-item:hover,
.footer-desc .dropdown .dropdown-item:focus {
  background-color: #eaeaea;
}

/* 底部导航栏：微信公众号 13px */
.footer-wechat-label {
  font-size: 14px;
  color: #666666;
  margin-top: 8px;
  display: block;
}

.product-card{
  background: #fff;
  border-radius: 9px;
  padding: 35px 25px;
  text-align: center;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.06);
  transition: all 0.3s ease;
  height: 100%;
  border: 1px solid rgba(0, 0, 0, 0.04);
}
.product-card:hover {
    transform: translateY(-6px); 
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15); 
}
.footer-qr-text {
  color: #666666;
  font-size: 0.85rem;
  margin-bottom: 8px;
}

.footer-contact {
  list-style: none;
  padding: 0;
}

.footer-contact li {
  margin-bottom: 12px;
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.6);
  display: flex;
  align-items: flex-start;
  gap: 10px;
}

.footer-contact .contact-icon {
  color: var(--primary);
  flex-shrink: 0;
}

.footer-bottom {
  margin-top: 40px;
  padding: 20px 0;
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  text-align: center;
  font-size: 14px;
  color: #999999;
}

.footer-bottom a {
  color: #666666;
}

/* ============================================================
   九、页面横幅 Page Banner（非首页）
   ============================================================ */

.page-banner {
  position: relative;
  height: 17.5rem;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-banner img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-banner .overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  /* background: linear-gradient(to bottom, rgba(0,0,0,0.55), rgba(0,0,0,0.7)); */
  z-index: 1;
}

.page-banner .banner-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #fff;
}

.page-banner .banner-content h1 {
  /* font-size: 48px; */
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: 2px;
  color: #fff;
  opacity: 0;
  transform: translateY(60px);
  animation: bannerTitleFloatUp 1s cubic-bezier(0.22, 1, 0.36, 1) 0.1s forwards;
}

.page-banner .banner-content .breadcrumb-nav {
  opacity: 0;
  transform: translateY(40px);
  animation: bannerTitleFloatUp 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.4s forwards;
}

@keyframes bannerTitleFloatUp {
  from {
    opacity: 0;
    transform: translateY(60px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.page-banner .breadcrumb-nav {
  background: none;
  justify-content: center;
  padding: 0;
  margin: 0;
  font-size: 15px;
}

.page-banner .breadcrumb-nav .breadcrumb-item a {
  color: rgba(255,255,255,0.8);
  text-decoration: none;
}

.page-banner .breadcrumb-nav .breadcrumb-item.active {
  color: #fff;
}

.page-banner .breadcrumb-item+.breadcrumb-item::before {
  color: rgba(255,255,255,0.6);
}

/* 新闻页面横幅 */
.news-banner {
  position: relative;
  height: 400px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.news-banner img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.news-banner::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.4);
}

.news-banner .banner-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #fff;
}

.news-banner .banner-content h1 {
  font-size: 40px;
  font-weight: 700;
  margin-bottom: 10px;
  color: #fff;
  opacity: 0;
  transform: translateY(60px);
  animation: bannerTitleFloatUp 1s cubic-bezier(0.22, 1, 0.36, 1) 0.1s forwards;
}

.news-banner .banner-content p {
  font-size: 16px;
  opacity: 0;
  transform: translateY(40px);
  animation: bannerTitleFloatUp 0.9s cubic-bezier(0.22, 1, 0.36, 1) 0.35s forwards;
}

/* 服务页面横幅 */
.page-banner.service-banner {
  position: relative;
  height: 400px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-banner.service-banner img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-banner.service-banner .overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to bottom, rgba(0,0,0,0.55), rgba(0,0,0,0.7));
  z-index: 1;
}

.page-banner.service-banner .banner-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #fff;
}

.page-banner.service-banner h1 {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: 2px;
  color: #fff;
  opacity: 0;
  transform: translateY(60px);
  animation: bannerTitleFloatUp 1s cubic-bezier(0.22, 1, 0.36, 1) 0.1s forwards;
}

/* 联系页面横幅 */
.page-banner.contact-banner {
  background: linear-gradient(135deg, #005293, #0098dc);
  height: 400px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  text-align: center;
  position: relative;
}

.page-banner.contact-banner h1 {
  color: #fff;
  font-size: 2.2rem;
  font-weight: 700;
  opacity: 0;
  transform: translateY(60px);
  animation: bannerTitleFloatUp 1s cubic-bezier(0.22, 1, 0.36, 1) 0.1s forwards;
}

.page-banner.contact-banner img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
}

.small-title-blue {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
    display: inline-block;
    font-family: var(--font-cn);
    font-weight: 500;
    text-align: center;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    border: 2px solid transparent;
    padding: 5px 10px;
    border-radius: var(--radius);
    transition: all 0.3s ease;
    text-decoration: none;
    position: relative;
    overflow: hidden;
    white-space: nowrap;
}

/* ============================================================
   十、面包屑
   ============================================================ */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  padding: 15px 0;
  list-style: none;
  font-size: 16px;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: '›';
  padding: 0 10px;
  color: var(--gray);
  font-weight: bold;
}

.breadcrumb-item a {
  color: var(--gray);
  text-decoration: none;
  transition: var(--transition);
}

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

.breadcrumb-item.active {
  color: var(--primary);
  font-weight: 500;
}

.rd-sub-item-left {
    /* padding-right: 35.5px; */
    /* border-right: 0.5px solid #ddd; */
}
.rd-sub-item-right{
    /* padding-left: 35.5px; */
    /* border-left: 0.5px solid #ddd; */
}

/* ============================================================
   十、时间线 / 发展历程
   ============================================================ */

.timeline {
  position: relative;
  padding: 20px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  width: 2px;
  height: 100%;
  background: var(--primary-lighter);
  transform: translateX(-50%);
}

.timeline-item {
  position: relative;
  margin-bottom: 50px;
  width: 50%;
}

.timeline-item:nth-child(odd) {
  left: 0;
  padding-right: 50px;
  text-align: right;
}

.timeline-item:nth-child(even) {
  left: 50%;
  padding-left: 50px;
  text-align: left;
}

.timeline-item::before {
  content: '';
  position: absolute;
  top: 5px;
  width: 14px;
  height: 14px;
  background: var(--primary);
  border: 3px solid var(--white);
  border-radius: 50%;
  box-shadow: 0 0 0 3px var(--primary);
  z-index: 1;
}

.timeline-item:nth-child(odd)::before {
  right: -7px;
}

.timeline-item:nth-child(even)::before {
  left: -7px;
}

.timeline-year {
  font-family: var(--font-en);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 5px;
  display: block;
}

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

.timeline-desc {
  font-size: 0.9rem;
  color: var(--dark-light);
  line-height: 1.6;
}

/* ============================================================
   十一、招聘列表
   ============================================================ */

.recruitment-list {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.recruitment-item {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 25px 30px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.3s ease;
  border-left: 3px solid transparent;
}

.recruitment-item:hover {
  border-left-color: var(--primary);
  transform: translateX(5px);
  box-shadow: var(--shadow);
}

.recruitment-info h4 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.recruitment-meta {
  display: flex;
  gap: 20px;
  font-size: 0.85rem;
  color: var(--gray);
}

.recruitment-meta span {
  display: flex;
  align-items: center;
  gap: 5px;
}

/* ============================================================
   十二、质量/EHS内容区块
   ============================================================ */

.quality-section {
  padding: 80px 0;
}

.quality-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.quality-card {
  text-align: center;
  padding: 40px 25px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.quality-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.3s ease;
}

.quality-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
}

.quality-card:hover::before {
  transform: scaleX(1);
}

.quality-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto 20px;
  background: var(--primary-lighter);
  border-radius: var(--radius-round);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  color: var(--primary);
  transition: all 0.3s ease;
}

.quality-card:hover .quality-icon {
  background: var(--primary);
  color: var(--white);
  transform: scale(1.1);
}

.quality-card h4 {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.quality-card p {
  font-size: 0.88rem;
  color: var(--dark-light);
}

/* 认证列表 */
.certification-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.certification-item {
  background: var(--white);
  border: 1px solid var(--gray-light);
  border-radius: var(--radius);
  padding: 25px 15px;
  text-align: center;
  transition: all 0.3s ease;
}

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

.certification-item img {
  height: 60px;
  margin: 0 auto 10px;
}

.certification-item h5 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 0;
}

/* ============================================================
   十三、联系方式样式
   ============================================================ */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
}

.contact-info-list {
  list-style: none;
  padding: 0;
}

.contact-info-item {
  display: flex;
  gap: 20px;
  margin-bottom: 30px;
  padding: 20px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
}

.contact-info-item:hover {
  box-shadow: var(--shadow);
  transform: translateX(5px);
}

.contact-info-icon {
  width: 50px;
  height: 50px;
  flex-shrink: 0;
  background: var(--primary-lighter);
  border-radius: var(--radius-round);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.2rem;
}

.contact-info-text h5 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.contact-info-text p {
  font-size: 0.88rem;
  margin-bottom: 0;
}

/* 地图容器 */
.map-container {
  border-radius: var(--radius);
  overflow: hidden;
  /* box-shadow: var(--shadow); */
}

.map-container iframe {
  width: 100%;
  height: 400px;
  border: none;
}

/* ============================================================
   十四、加载动画覆盖层
   ============================================================ */

.page-loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--white);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

.page-loader.loaded {
  opacity: 0;
  visibility: hidden;
}

.loader-spinner {
  width: 48px;
  height: 48px;
  border: 3px solid var(--gray-lighter);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* 脉冲加载点 */
.loader-dots {
  display: flex;
  gap: 8px;
}

.loader-dots span {
  width: 12px;
  height: 12px;
  background: var(--primary);
  border-radius: 50%;
  animation: dotPulse 1.4s ease-in-out infinite both;
}

.loader-dots span:nth-child(1) { animation-delay: -0.32s; }
.loader-dots span:nth-child(2) { animation-delay: -0.16s; }
.loader-dots span:nth-child(3) { animation-delay: 0s; }

@keyframes dotPulse {
  0%, 80%, 100% { transform: scale(0); opacity: 0.3; }
  40% { transform: scale(1); opacity: 1; }
}

/* ============================================================
   十五、其他全局动画
   ============================================================ */

/* 统计数字滚动 */
.counter-up {
  font-family: var(--font-en);
  font-weight: 800;
  color: var(--primary);
}

/* 悬停缩放效果 */
.hover-zoom {
  overflow: hidden;
}

.hover-zoom img {
  transition: transform 0.5s ease;
}

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

/* 回到顶部 */
.back-to-top {
  position: fixed;
  right: 30px;
  bottom: 30px;
  width: 44px;
  height: 44px;
  background: var(--primary);
  color: var(--white);
  border-radius: var(--radius-round);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 91, 187, 0.35);
  text-decoration: none;
}

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

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 25px rgba(0, 91, 187, 0.5);
  color: var(--white);
}

/* 标签/徽章 */
.badge {
  display: inline-block;
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 20px;
  background: var(--primary-lighter);
  color: var(--primary);
}

.badge-primary {
  background: var(--primary);
  color: var(--white);
}

/* 分割线 */
.divider {
  width: 60px;
  height: 3px;
  background: var(--primary);
  margin: 15px 0;
  border-radius: 2px;
}

.divider-center {
  margin: 15px auto;
}

/* 遮罩层 */
.overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  /* background: rgba(0, 0, 0, 0.5); */
  border-radius: var(--radius);
  transition: var(--transition);
}

/* ============================================================
   十六、页面元素淡入向上动画
   ============================================================ */

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

.animate-fade-in-up {
  opacity: 0;
  animation: fadeInUp 0.8s ease forwards;
}

.animate-fade-in-up-delay-1 {
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.1s forwards;
}

.animate-fade-in-up-delay-2 {
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.2s forwards;
}

.animate-fade-in-up-delay-3 {
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.3s forwards;
}

.animate-fade-in-up-delay-4 {
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.4s forwards;
}

.animate-fade-in-up-delay-5 {
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.5s forwards;
}

.animate-fade-in-up-delay-6 {
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.6s forwards;
}

.animate-fade-in-up-delay-7 {
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.7s forwards;
}

.animate-fade-in-up-delay-8 {
  opacity: 0;
  animation: fadeInUp 0.8s ease 0.8s forwards;
}

/* ========== 滚动触发淡入上浮动画（data-animate 通用） ========== */
[data-animate] {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.85s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.85s cubic-bezier(0.22, 1, 0.36, 1);
}
[data-animate].is-visible {
  opacity: 1;
  transform: translateY(0);
}
[data-animate-delay="1"].is-visible { transition-delay: 0.1s; }
[data-animate-delay="2"].is-visible { transition-delay: 0.2s; }
[data-animate-delay="3"].is-visible { transition-delay: 0.3s; }
[data-animate-delay="4"].is-visible { transition-delay: 0.4s; }
[data-animate-delay="5"].is-visible { transition-delay: 0.5s; }
[data-animate-delay="6"].is-visible { transition-delay: 0.6s; }
[data-animate-delay="7"].is-visible { transition-delay: 0.7s; }
@media (prefers-reduced-motion: reduce) {
  [data-animate] { opacity: 1; transform: none; transition: none; }
}

.navbar .container .navbar-brand svg {
  width: 120px;
}

.cls-1 {
    fill: white;
}

.st0 {
     fill: #005bbb;
}

.section-header {
  text-align: center;
  margin-bottom: 30px;
}

.section-header h3 {
  /* font-size: 1.8rem; */
  color: var(--dark);
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
  font-weight: 600;
}

.section-header h3::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--primary);
  margin: 12px auto 0;
  border-radius: 2px;
}

/* ========== css/responsive.css ========== */
/* ============================================================
   responsive.css - 响应式覆盖样式
   描述：平板及移动端响应式调整（单列布局、触摸优化、元素堆叠）
   断点：max-width: 767px（移动端 + 小平板）
   适用范围：所有需要在小屏幕上调整的页面
   ============================================================ */

/* ========== 平板 & 小平板 (769px - 1023px) ========== */
@media (min-width: 769px) and (max-width: 1023px) {
  /* ---- 容器调整 ---- */
  .container {
    max-width: 100%;
    padding-left: 24px;
    padding-right: 24px;
  }

  /* ---- 导航栏平板优化 ---- */
  .navbar {
    height: 80px;
    padding: 0 30px;
  }

  .navbar .container {
    height: 80px;
    padding: 0 15px;
  }

  .navbar:hover,
  .navbar .container:hover {
    height: 80px;
  }

  .navbar.navbar-scrolled {
    height: 80px;
  }

  .navbar-brand {
    font-size: 1.15rem;
  }

  .navbar-brand .brand-sub {
    font-size: 0.75rem;
  }

  .nav-link {
    font-size: 0.9rem;
    padding: 10px 12px;
  }

  .navbar-toggler {
    display: flex !important;
    min-width: 44px;
    min-height: 44px;
    padding: 8px 10px;
    border-radius: 8px;
    border: 1px solid rgba(0, 0, 0, 0.15);
  }

  /* ---- 卡片网格 → 双列 ---- */
  .card-grid,
  .product-grid,
  .quality-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }

  .card-grid-4,
  .certification-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .card-body {
    padding: 24px;
  }

  .card-title {
    font-size: 1.15rem;
  }

  /* ---- 产品卡片 ---- */
  .product-card {
    border-radius: 16px;
  }

  .product-card .product-body {
    padding: 20px;
  }

  .product-card .product-title {
    font-size: 1.1rem;
  }

  /* ---- 新闻卡片 ---- */
  .news-card {
    flex-direction: column;
    border-radius: 16px;
  }

  .news-card .news-img {
    flex: 0 0 220px;
    width: 100%;
  }

  .news-card .news-body {
    padding: 22px;
  }

  .news-card .news-title {
    font-size: 1rem;
  }

  /* ---- Hero 平板优化 ---- */
  .hero-section {
    min-height: 75vh;
  }

  .hero-content {
    max-width: 90%;
    padding: 100px 0 40px;
  }

  /* Hero 媒体切换器 平板 */
  .hero-media-switcher {
    bottom: 20px;
    left: 20px;
    gap: 8px;
  }
  .media-indicators { gap: 8px; }
  .media-bar {
    width: 45px;
    height: 3px;
    cursor: pointer;
    pointer-events: auto;
  }
  .media-bar.active { width: 45px; }

  .hero-content h1 {
    font-size: 2.5rem;
    line-height: 1.3;
  }

  .hero-content p {
    font-size: 1.05rem;
    margin-bottom: 30px;
  }

  .hero-illustration {
    display: none;
  }

  /* ---- 页面Banner ---- */
  .page-banner {
    padding: 100px 0 40px;
  }

  .page-banner h1 {
    font-size: 2rem;
  }

  /* ---- 时间线 ---- */
  .timeline-item,
  .timeline-item:nth-child(odd),
  .timeline-item:nth-child(even) {
    width: 100%;
    left: 0;
    padding-left: 60px;
    padding-right: 20px;
    text-align: left;
  }

  .timeline::before {
    left: 22px;
  }

  .timeline-item::before,
  .timeline-item:nth-child(odd)::before,
  .timeline-item:nth-child(even)::before {
    left: 15px;
    right: auto;
  }

  /* ---- 招聘列表 ---- */
  .recruitment-item {
    padding: 24px;
    gap: 16px;
  }

  /* ---- 联系方式 ---- */
  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
  }

  /* ---- 服务表单 ---- */
  .service-form {
    padding: 30px 25px;
  }

  .service-form .form-row {
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
  }

  /* ---- 页脚平板优化 ---- */
  .site-footer .container {
    padding: 40px 24px;
  }

  .site-footer .row {
    flex-direction: row;
    justify-content: space-between;
    margin-top: 30px;
  }

  .site-footer .col-lg-4 {
    width: 45%;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
  }

  .site-footer .col-lg-6 {
    width: 50%;
    display: flex;
  }

  .site-footer .footer-desc {
    display: block;
  }

  .site-footer .mt-4 {
    margin-top: 20px !important;
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 12px;
  }

  .site-footer .footer-qr-text {
    font-size: 0.85rem;
    color: #666;
    white-space: nowrap;
  }

  .site-footer img {
    width: 80px !important;
    height: 80px !important;
  }

  .footer-bottom {
    margin-top: 30px;
    padding: 20px 0;
  }

  /* ---- 质量/EHS卡片 ---- */
  .quality-card {
    padding: 35px 25px;
  }

  .quality-icon {
    width: 70px;
    height: 70px;
    font-size: 1.6rem;
  }

  /* ---- 按钮调整 ---- */
  .btn {
    min-height: 46px;
    padding: 12px 24px;
    font-size: 0.95rem;
  }

  .btn-sm {
    min-height: 40px;
    padding: 10px 18px;
  }

  .btn-lg {
    min-height: 52px;
    padding: 14px 32px;
    font-size: 1rem;
  }

  /* ---- 表单元素 ---- */
  .form-control {
    padding: 12px 16px;
    font-size: 0.95rem;
  }

  /* ---- 字号由7断点响应式系统控制 ---- */

  /* ---- 回到顶部按钮 ---- */
  .back-to-top {
    right: 20px;
    bottom: 20px;
    width: 44px;
    height: 44px;
    font-size: 1.1rem;
  }

  /* ---- 移动端菜单覆盖层 ---- */
  .mobile-menu-overlay {
    display: block !important;
    z-index: 9999;
  }

  .mobile-menu-content {
    width: 75%;
    max-width: 300px;
  }
}
/* ========== 移动端 (max-width: 769px) ========== */
@media (max-width: 769px) {
  /* html font-size 已由7断点响应式系统控制 */

  body {
    line-height: 1.65;
  }

  /* ---- 字号由7断点响应式系统控制 ---- */

  /* ---- 容器全宽 ---- */
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  /* ---- 区块间距缩减 ---- */
  section,
  .section {
    padding: 50px 0;
  }

  .section-header {
    margin-bottom: 30px;
  }

  .section-header h2 {
    font-size: 1rem;
  }

  .section-header p {
    font-size: 0.9rem;
  }

  /* ---- 导航栏移动端调整 ---- */
  .navbar {
    min-height: 60px;
    height: 60px;
    padding: 8px 16px;
    transition: 0.35s ease;
  }

  .navbar:hover {
    height: 60px;
  }

  .navbar .container {
    justify-content: space-between;
    height: 60px;
  }

  .navbar .container:hover {
    height: 60px;
  }

  .navbar-nav {
    flex: none;
    justify-content: flex-start;
    margin-left: 0 !important;
  }

  .nav-item {
    padding-top: 0;
  }

  .navbar.navbar-scrolled {
    min-height: 70px;
    height: 70px;
    padding: 6px 16px;
  }

  /* 移动端下拉菜单保持默认行为（取消 PC 端高度延展动画） */
  .navbar .dmenu {
    position: static;
    width: auto;
    top: auto;
    left: auto;
    right: auto;
    padding: 10px;
    margin-top: 10px;
    box-shadow: none;
    border-radius: var(--radius);
    max-height: none;
    overflow: visible;
    opacity: 1;
    transition: none;
  }

  .navbar-brand {
    font-size: 1.2rem;
    gap: 0.5rem;
  }

  .navbar-brand .brand-sub {
    font-size: 0.8rem;
  }

  .navbar-brand img {
    height: 32px;
  }

  /* 移动端折叠菜单：白色卡片风格 */
  .navbar-collapse {
    background: #ffffff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 12px 16px;
    margin-top: 8px;
    max-height: 80vh;
    overflow-y: auto;
  }

  .navbar-collapse .nav-link {
    color: #333333 !important;
    padding: 12px 16px;
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
  }

  .navbar-collapse .nav-link:hover,
  .navbar-collapse .nav-link:active {
    background: var(--primary-lighter);
    color: #005BBB !important;
  }

  .navbar-collapse .dmenu {
    background: transparent;
    box-shadow: none;
    padding: 0 0 0 15px;
    margin: 0;
    border-radius: var(--radius-sm);
  }

  .navbar-collapse .dmenu-item {
    padding: 10px 16px;
    font-size: 0.9rem;
  }

  /* 确保展开状态下所有文字为黑色（覆盖透明导航栏的白色） */
  .navbar.navbar-transparent .navbar-collapse.show .nav-link {
    color: #333333 !important;
  }

  /* ---- 按钮触摸优化 ---- */
  .btn,
  .btn-primary,
  .btn-secondary,
  .btn-outline-white,
  .btn-outline-dark {
    min-height: 44px;
    padding: 10px 22px;
    font-size: 0.92rem;
    width: 100%;
    display: block;
    text-align: center;
  }

  .btn-group {
    flex-direction: column;
    gap: 10px;
  }

  .btn-group .btn {
    width: 100%;
  }

  .btn-sm {
    min-height: 38px;
    padding: 8px 16px;
    font-size: 0.85rem;
  }

  .btn-lg {
    min-height: 50px;
    padding: 14px 28px;
    font-size: 1rem;
  }

  /* ---- 所有网格 → 单列 ---- */
  .card-grid,
  .card-grid-2,
  .card-grid-4,
  .product-grid,
  .quality-grid,
  .certification-list {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  /* ---- 卡片间距调整 ---- */
  .card-body {
    padding: 20px;
  }

  .card-title {
    font-size: 1.1rem;
  }

  .card-text {
    font-size: 0.88rem;
  }

  /* ---- 产品卡片 ---- */
  .product-card .product-body {
    padding: 16px;
  }

  /* ---- 新闻卡片纵向 ---- */
  .news-card {
    flex-direction: column;
  }

  .news-card .news-img {
    flex: 0 0 180px;
    width: 100%;
  }

  .news-card .news-body {
    padding: 18px;
  }

  /* ---- Hero 移动端 ---- */
  .hero-section {
    min-height: 70vh;
    text-align: center;
  }

  .hero-content {
    max-width: 100%;
    text-align: center;
    padding: 80px 0 40px;
  }

  /* Hero 媒体切换器 手机 */
  .hero-media-switcher {
    bottom: 14px;
    gap: 8px;
    left: 14px;
  }
  .media-indicators { gap: 6px; }
  .media-bar {
    width: 36px;
    height: 3px;
    cursor: pointer;
    pointer-events: auto;
  }
  .media-bar.active { width: 36px; }

  .hero-content h1 {
    font-size: 2rem;
  }

  .hero-content p {
    font-size: 1rem;
  }

  .hero-illustration {
    display: none;
  }

  .hero-dots {
    width: 100%;
    background-size: 30px 30px;
  }

  .scroll-indicator {
    display: none;
  }

  /* ---- 页面Banner ---- */
  .page-banner {
    padding: 70px 0 30px;
  }

  .page-banner h1 {
    font-size: 1.6rem;
  }

  /* ---- 时间线 → 单侧显示 ---- */
  .timeline::before {
    left: 16px;
  }

  .timeline-item,
  .timeline-item:nth-child(odd),
  .timeline-item:nth-child(even) {
    width: 100%;
    left: 0;
    padding-left: 40px;
    padding-right: 0;
    text-align: left;
  }

  .timeline-item::before,
  .timeline-item:nth-child(odd)::before,
  .timeline-item:nth-child(even)::before {
    left: 9px;
    right: auto;
  }

  .timeline-year {
    font-size: 1.1rem;
  }

  .timeline-title {
    font-size: 1rem;
  }

  /* ---- 招聘列表 ---- */
  .recruitment-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 20px;
  }

  .recruitment-meta {
    flex-direction: column;
    gap: 5px;
  }

  /* ---- 联系方式 ---- */
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .contact-info-item {
    padding: 16px;
  }

  /* ---- 服务表单 ---- */
  .service-form {
    padding: 25px 20px;
  }

  .service-form .form-row {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .form-control {
    padding: 10px 14px;
    font-size: 0.92rem;
  }

  /* ---- 页脚单列 ---- */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer {
    padding: 40px 0 0;
  }

  .footer-bottom {
    margin-top: 30px;
  }

  /* ---- 质量/EHS卡片 ---- */
  .quality-card {
    padding: 30px 20px;
  }

  .quality-icon {
    width: 60px;
    height: 60px;
    font-size: 1.5rem;
  }

  /* ---- 回到顶部按钮 ---- */
  .back-to-top {
    right: 16px;
    bottom: 16px;
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }

  /* ---- 面包屑 ---- */
  .breadcrumb {
    font-size: 0.82rem;
    flex-wrap: wrap;
  }

  /* ---- 图片适应 ---- */
  img {
    max-width: 100%;
    height: auto;
  }

  /* ---- 表单元素全宽 ---- */
  .form-control {
    width: 100%;
  }

  /* ---- 间距微调 ---- */
  .mt-50 { margin-top: 30px; }
  .mb-50 { margin-bottom: 30px; }
}

/* =====================================================
 * 响应式字号系统 - 7个区间段
 * 1) >=1440px  桌面大屏  font-size: 34px (17px基准)
 * 2) >=1200px  桌面      font-size: 30px (15px基准)
 * 3) >=1024px  笔记本    font-size: 28px (14px基准)
 * 4) >=769px   平板      font-size: 34px (17px基准)
 * 5) >=435px   大手机    font-size: 30px (15px基准)
 * 6) >=360px   小手机    font-size: 26px (13px基准)
 * 7) <360px    超小手机   font-size: 24px (12px基准)
 * ===================================================== */

/* 默认基线（小于 360px 设备） */
html { font-size: 24px; }

/* 区间1：>=1440px 大屏桌面 */
@media (min-width: 1440px) {
  html { font-size: 34px; }
  h2 { font-size: 34px; }
  .navbar .nav-link , .footer-title { font-size: 18px; }
  .footer-links a { font-size: 17px; }
  .navbar-brand { font-size: 1.6rem; }
  .hero-content h1, .title-hero, .page-banner .banner-content h1 { font-size: 50px; }
  .hero-link{ font-size: 16px; }
  .rd-showcase-content p, .si-showcase-caption,
  .sic-showcase-caption {
    font-size: 20px;
  }
  /* .hero-content h2 { font-size: 1rem; } */
  .hero-content p { font-size: 1.1rem; }
  .section-title { font-size: 2.4rem; }
  .section-subtitle { font-size: 1.1rem; }
  /* h2 { font-size: 2.4rem; } */
  /* h3 { font-size: 1.8rem; } */
  h4 { font-size: 1.4rem; }
  h5 { font-size: 1.2rem; }
  .card-text, .news-card-text, .news-excerpt { font-size: 1rem; }
  .card-title { font-size: 1.3rem; }
  .btn { font-size: 1rem; padding: 0.7rem 1.6rem; }
  .product-card .product-name { font-size: 1.3rem; }
  .product-card .product-desc { font-size: 0.95rem; }
  .product-card .product-spec { font-size: 0.85rem; }
  .news-card .news-title { font-size: 1.25rem; }
  .news-card .news-date { font-size: 0.9rem; }
  section, .section { padding: 1.8rem 0; }
  .container { max-width: 1320px; }
}

/* 区间2：>=1200px 桌面（< 1440px：导航 16px/15px） */
@media (min-width: 1200px) and (max-width: 1440px) {
  html { font-size: 30px; }
  h2 { font-size: 32px; }
  .navbar .nav-link , .footer-title { font-size: 16px; }
  .dmenu .dmenu-item { font-size: 15px; }
  .footer-links a { font-size: 15px; }
  .navbar-brand { font-size: 1.5rem; }
  .hero-content h1, .title-hero, .page-banner .banner-content h1 { font-size: 48px; }
  .hero-link{ font-size: 15px; }
  .rd-showcase-content p, .si-showcase-caption,
  .sic-showcase-caption {
    font-size: 16px;
  }
  /* .hero-content h2 { font-size: 2.2rem; } */
  .hero-content p { font-size: 1.05rem; }
  .section-title { font-size: 2.2rem; }
  .section-subtitle { font-size: 1.05rem; }
  /* h2 { font-size: 2.2rem; } */
  /* h3 { font-size: 1.7rem; } */
  h4 { font-size: 1.3rem; }
  h5 { font-size: 1.15rem; }
  .card-text, .news-card-text, .news-excerpt { font-size: 0.95rem; }
  .card-title { font-size: 1.2rem; }
  .btn { font-size: 0.95rem; padding: 0.65rem 1.5rem; }
  .product-card .product-name { font-size: 1.2rem; }
  .product-card .product-desc { font-size: 0.9rem; }
  .product-card .product-spec { font-size: 0.85rem; }
  .news-card .news-title { font-size: 1.15rem; }
  .news-card .news-date { font-size: 0.85rem; }
  section, .section { padding: 1.5rem 0; }
}

/* 区间3：>=1024px 笔记本（< 1440px：导航 16px/15px） */
@media (min-width: 1024px) and (max-width: 1200px) {
  html { font-size: 28px; }
  h2 { font-size: 30px; }
  .navbar .nav-link , .footer-title { font-size: 16px; }
  .dmenu .dmenu-item { font-size: 15px; }
  .footer-links a { font-size: 15px; }
  .navbar-brand { font-size: 1.4rem; }
  .hero-content h1, .title-hero, .page-banner .banner-content h1{ font-size: 46px; }
  .hero-link{ font-size: 14px; }
  .rd-showcase-content p, .si-showcase-caption,
  .sic-showcase-caption {
    font-size: 16px;
  }
  /* .hero-content h2 { font-size: 2rem; } */
  .hero-content p { font-size: 1rem; }
  .section-title { font-size: 2rem; }
  .section-subtitle { font-size: 1rem; }
  /* h2 { font-size: 2rem; } */
  /* h3 { font-size: 1.5rem; } */
  h4 { font-size: 1.2rem; }
  h5 { font-size: 1.1rem; }
  .card-text, .news-card-text, .news-excerpt { font-size: 0.92rem; }
  .card-title { font-size: 1.15rem; }
  .btn { font-size: 0.9rem; padding: 0.6rem 1.4rem; }
  .product-card .product-name { font-size: 1.15rem; }
  .product-card .product-desc { font-size: 0.88rem; }
  .product-card .product-spec { font-size: 0.82rem; }
  .news-card .news-title { font-size: 1.1rem; }
  .news-card .news-date { font-size: 0.85rem; }
  section, .section { padding: 1.5rem 0; }
}

/* 区间4：>=769px 平板（< 1440px：导航 16px/15px，两列布局） */
@media (min-width: 769px) and (max-width: 1024px) {
  html { font-size: 34px; }
  h2 { font-size: 28px; }
  #navbarContent { display: none !important; }
  .navbar .nav-link , .footer-title { font-size: 16px;}
  .dmenu .dmenu-item { font-size: 15px; }
  .footer-links a { font-size: 15px; }
  .navbar-brand { font-size: 1.5rem; }
  .rd-showcase-content p, .si-showcase-caption,
  .sic-showcase-caption {
    font-size: 16px;
  }
  .hero-content h1,
  .title-hero,.page-banner .banner-content h1 { font-size: 42px; }
  .hero-link{ font-size: 13px; }
  /* .hero-content h2 { font-size: 1.8rem; } */
  .hero-content p { font-size: 0.95rem; }
  .section-title { font-size: 1.8rem; }
  .section-subtitle { font-size: 0.95rem; }
  /* h2 { font-size: 1.8rem; } */
  /* h3 { font-size: 1.4rem; } */
  h4 { font-size: 1.15rem; }
  h5 { font-size: 1.05rem; }
  .card-text, .news-card-text, .news-excerpt { font-size: 0.85rem; }
  .card-title { font-size: 1.05rem; }
  .btn { font-size: 0.85rem; padding: 0.55rem 1.2rem; }
  .product-card .product-name { font-size: 1.05rem; }
  .product-card .product-desc { font-size: 0.82rem; }
  .product-card .product-spec { font-size: 0.78rem; }
  .news-card .news-title { font-size: 1rem; }
  .news-card .news-date { font-size: 0.8rem; }
  section, .section { padding: 2rem 0; }

  /* 卡片两列布局 */
  .product-grid,
  .news-grid,
  .cards-grid { grid-template-columns: repeat(2, 1fr) !important; }
}

/* 区间5：>=435px 大手机（< 1440px：导航 16px/15px，单列布局） */
@media (min-width: 435px) and (max-width: 769px) {
  html { font-size: 30px; }
  h2 { font-size: 26px; }
  #navbarContent { display: none !important; }
  .navbar .nav-link , .footer-title { font-size: 16px;}
  .dmenu .dmenu-item { font-size: 15px; }
  .footer-links a { font-size: 15px; }
  .navbar-brand { font-size: 1.4rem; }
  .rd-showcase-content p, .si-showcase-caption,
  .sic-showcase-caption {
    font-size: 16px;
  }
  .hero-content h1,
  .title-hero,.page-banner .banner-content h1 { font-size: 38px;}
  .hero-link{ font-size: 12px; }
  .hero-text{ left: 2rem!important; }
  /* .hero-content h2 { font-size: 1.6rem; } */
  .hero-content p { font-size: 0.9rem; }
  .section-title { font-size: 1.6rem; }
  .section-subtitle { font-size: 0.9rem; }
  /* h2 { font-size: 1.6rem; } */
  /* h3 { font-size: 1.3rem; } */
  h4 { font-size: 1.05rem; }
  h5 { font-size: 0.95rem; }
  .card-text, .news-card-text, .news-excerpt { font-size: 0.8rem; }
  .card-title { font-size: 0.95rem; }
  .btn { font-size: 0.8rem; padding: 0.5rem 1.1rem; }
  .product-card .product-name { font-size: 0.95rem; }
  .product-card .product-desc { font-size: 0.78rem; }
  .product-card .product-spec { font-size: 0.72rem; }
  .news-card .news-title { font-size: 0.92rem; }
  .news-card .news-date { font-size: 0.75rem; }
  section, .section { padding: 2.5rem 0; }

  /* 卡片单列布局 */
  .product-grid,
  .news-grid,
  .cards-grid { grid-template-columns: 1fr !important; }
}

/* 区间6：>=360px 小手机（< 1440px：导航 16px/15px） */
@media (min-width: 360px) and (max-width: 435px) {
  html { font-size: 26px; }
  h2 { font-size: 24px; }
  #navbarContent { display: none !important; }
  .navbar .nav-link , .footer-title { font-size: 16px;}
  .dmenu .dmenu-item { font-size: 15px; }
  .footer-links a { font-size: 15px; }
  .navbar-brand { font-size: 1.3rem; }
  .rd-showcase-content p, .si-showcase-caption,
  .sic-showcase-caption {
    font-size: 16px;
  }
  .hero-content h1,
  .title-hero,.page-banner .banner-content h1 { font-size: 34px; }
    .hero-link{ font-size: 11px; }
  .hero-text{ left: 1rem !important; }
  /* .hero-content h2 { font-size: 1.3rem; } */
  .hero-content p { font-size: 0.85rem; }
  .section-title { font-size: 1.3rem; }
  .section-subtitle { font-size: 0.85rem; }
  /* h2 { font-size: 1.3rem; } */
  /* h3 { font-size: 1.1rem; } */
  h4 { font-size: 0.95rem; }
  h5 { font-size: 0.88rem; }
  .card-text, .news-card-text, .news-excerpt { font-size: 0.75rem; }
  .card-title { font-size: 0.88rem; }
  .btn { font-size: 0.78rem; padding: 0.45rem 1rem; }
  .product-card .product-name { font-size: 0.88rem; }
  .product-card .product-desc { font-size: 0.72rem; }
  .product-card .product-spec { font-size: 0.68rem; }
  .news-card .news-title { font-size: 0.85rem; }
  .news-card .news-date { font-size: 0.7rem; }
  section, .section { padding: 3rem 0; }

  /* 卡片单列紧凑布局 */
  .product-grid,
  .news-grid,
  .cards-grid { grid-template-columns: 1fr !important; gap: 1rem !important; }
}

/* 区间7：<360px 超小手机（< 1440px：导航 16px/15px） */
@media (max-width: 360px) {
  html { font-size: 24px; }
  h2 { font-size: 22px; }
  #navbarContent { display: none !important; }
  .navbar .nav-link , .footer-title { font-size: 16px;}
  .dmenu .dmenu-item { font-size: 15px; }
  .footer-links a { font-size: 15px; }
  .navbar-brand { font-size: 1.2rem; }
  .rd-showcase-content p, .si-showcase-caption,
  .sic-showcase-caption {
    font-size: 16px;
  }
  .hero-content h1,
  .title-hero,.page-banner .banner-content h1 { font-size: 30px; }
  .hero-link{ font-size: 10px; }
  .hero-text{ left: 1rem !important; }
  /* .hero-content h2 { font-size: 1.2rem; } */
  .hero-content p { font-size: 0.8rem; }
  .section-title { font-size: 1.2rem; }
  .section-subtitle { font-size: 0.8rem; }
  /* h2 { font-size: 1.2rem; } */
  /* h3 { font-size: 1rem; } */
  h4 { font-size: 0.88rem; }
  h5 { font-size: 0.82rem; }
  .card-text, .news-card-text, .news-excerpt { font-size: 0.7rem; }
  .card-title { font-size: 0.82rem; }
  .btn { font-size: 0.72rem; padding: 0.4rem 0.9rem; }
  .product-card .product-name { font-size: 0.82rem; }
  .product-card .product-desc { font-size: 0.68rem; }
  .product-card .product-spec { font-size: 0.65rem; }
  .news-card .news-title { font-size: 0.8rem; }
  .news-card .news-date { font-size: 0.65rem; }
  section, .section { padding: 2.5rem 0; }

  /* 卡片单列紧凑布局 */
  .product-grid,
  .news-grid,
  .cards-grid { grid-template-columns: 1fr !important; gap: 0.8rem !important; }
}

/* ========== 全局滚动条样式（主题蓝 #005BBB） ========== */
/* * {
  scrollbar-width: thin;
  scrollbar-color: #005BBB #f0f4f8;
} */

::-webkit-scrollbar {
  width: 4px;
}

::-webkit-scrollbar-track {
  background: var(--white);
}

::-webkit-scrollbar-thumb {
  background-color: var(--primary);
  border-radius: 0;
}

::-webkit-scrollbar-thumb:active {
  background: var(--primary-dark);
}


/* ========== SVG 箭头图标（继承父元素颜色和字号） ========== */
.icon-chevron-right,
.icon-chevron-left {
  display: inline-block;
  width: 0.8em;
  height: 0.8em;
  fill: currentColor;
  flex-shrink: 0;
}