/* ============================================
   东莞市亿彩电子科技有限公司 - 主样式文件
   ============================================ */

/* CSS变量定义 */
:root {
  --primary-color: #036eb8;
  --primary-dark: #025a96;
  --primary-light: #0580d4;
  --white: #ffffff;
  --black: #000000;
  --text-dark: #333333;
  --text-medium: #666666;
  --text-light: #999999;
  --border-color: #e5e5e5;
  --bg-light: #f5f5f5;
  --bg-gray: #fafafa;
  --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  --shadow-hover: 0 4px 16px rgba(0, 0, 0, 0.15);
  --transition: all 0.3s ease;
  --max-width: 1800px;
  --header-height: 120px;
}

/* 重置样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--white);
  overflow-x: hidden;
}

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

ul, ol {
  list-style: none;
}

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

button {
  cursor: pointer;
  border: none;
  outline: none;
  font-family: inherit;
}

input, textarea, select {
  font-family: inherit;
  outline: none;
}

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

/* ============================================
   头部导航
   ============================================ */

/* 顶部导航 - 蓝底白字 */
.top-nav {
  background-color: var(--primary-color);
  height: 40px;
  line-height: 40px;
  position: sticky;
  top: 0;
  z-index: 1000;
}

.top-nav .container {
  display: flex;
  justify-content: flex-end;
  align-items: center;
}

.top-nav-menu {
  display: flex;
  gap: 30px;
}

.top-nav-menu a {
  color: rgba(255, 255, 255, 0.9);
  font-size: 13px;
  font-weight: 400;
  padding: 0 5px;
  transition: var(--transition);
}

.top-nav-menu a:hover,
.top-nav-menu a.active {
  color: var(--white);
}

.top-nav-search-btn {
  background: none;
  color: rgba(255, 255, 255, 0.9);
  padding: 0 5px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.top-nav-search-btn:hover {
  color: var(--white);
}

.top-nav-search-btn svg {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  stroke-width: 2;
  fill: none;
}

/* 二级导航 - 白底黑字 */
.sub-nav {
  background-color: var(--white);
  height: 90px;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 40px;
  z-index: 999;
}

.sub-nav .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 100%;
}

.sub-nav-left {
  display: flex;
  align-items: center;
}

.sub-nav-logo {
  display: flex;
  align-items: center;
  line-height: 1;
}

.sub-nav-logo img {
  height: auto;
  width: 260px;
}

.sub-nav-right {
  display: flex;
  align-items: center;
  gap: 30px;
}

.sub-nav-menu {
  display: flex;
  gap: 25px;
  align-items: center;
}

.sub-nav-menu .dropdown {
  height: 90px;
  display: flex;
  align-items: center;
}

.sub-nav-menu > a,
.sub-nav-menu > .dropdown > a {
  color: var(--text-dark);
  font-size: 16px;
  font-weight: 400;
  padding: 0 5px;
  position: relative;
  display: flex;
  align-items: center;
  gap: 5px;
  transition: var(--transition);
}

.sub-nav-menu > a:hover,
.sub-nav-menu > .dropdown > a:hover,
.sub-nav-menu > a.active,
.sub-nav-menu > .dropdown > a.active {
  color: var(--primary-color);
}

.dropdown-arrow {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: rotate(45deg);
  margin-top: -2px;
  transition: var(--transition);
}

.dropdown:hover .dropdown-arrow {
  transform: rotate(225deg);
  margin-top: 2px;
}

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

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background-color: var(--white);
  box-shadow: var(--shadow);
  border-top: 2px solid var(--primary-color);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
  z-index: 100;
  padding: 10px 0;
}

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

.dropdown-menu a {
  display: block;
  padding: 10px 20px;
  color: var(--text-dark);
  font-size: 14px;
  border-bottom: none;
}

.dropdown-menu a:last-child {
  border-bottom: none;
}

.dropdown-menu a:hover {
  background-color: var(--bg-light);
  color: var(--primary-color);
}

/* 巨型下拉菜单 */
.mega-dropdown {
  position: static;
}

.mega-dropdown .dropdown-menu {
  left: 0;
  right: 0;
  width: 100%;
  padding: 30px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 30px;
}

.mega-dropdown-column h4 {
  color: var(--primary-color);
  font-size: 15px;
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
}

.mega-column-title {
  display: block;
  color: #0670b8 !important;
  font-size: 16px !important;
  font-weight: bold !important;
  text-transform: uppercase !important;
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.mega-column-title:hover {
  color: var(--primary-dark);
  padding-left: 5px;
}

.mega-dropdown-column a {
  display: block;
  padding: 8px 0;
  color: var(--text-medium);
  font-size: 13px;
  border-bottom: none;
}

.mega-dropdown-column a:hover {
  color: var(--primary-color);
  background-color: transparent;
  padding-left: 5px;
}

/* 搜索框 */
.search-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.8);
  z-index: 2000;
  display: none;
  justify-content: center;
  align-items: center;
}

.search-overlay.active {
  display: flex;
}

.search-box {
  width: 600px;
  max-width: 90%;
  position: relative;
}

.search-box input {
  width: 100%;
  height: 60px;
  padding: 0 60px 0 20px;
  font-size: 18px;
  border: none;
  border-radius: 30px;
  background-color: var(--white);
}

.search-box button {
  position: absolute;
  right: 5px;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background-color: var(--primary-color);
  color: var(--white);
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-box button svg {
  width: 20px;
  height: 20px;
  stroke: var(--white);
  stroke-width: 2;
  fill: none;
}

.search-close {
  position: absolute;
  top: 30px;
  right: 30px;
  color: var(--white);
  font-size: 30px;
  cursor: pointer;
}

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

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background-color: var(--white);
  box-shadow: var(--shadow);
  border-top: 2px solid var(--primary-color);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
  z-index: 100;
}

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

.dropdown-menu a {
  display: block;
  padding: 12px 20px;
  color: var(--text-dark);
  font-size: 14px;
  border-bottom: 1px solid var(--border-color);
}

.dropdown-menu a:last-child {
  border-bottom: none;
}

.dropdown-menu a:hover {
  background-color: var(--bg-light);
  color: var(--primary-color);
}

/* 巨型下拉菜单 */
.mega-dropdown {
  position: static;
}

.mega-dropdown .dropdown-menu {
  left: 0;
  right: 0;
  width: 100%;
  padding: 30px;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 30px;
}

.mega-dropdown-column h4 {
  color: var(--primary-color);
  font-size: 16px;
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
}

.mega-dropdown-column a {
  display: block;
  padding: 8px 0;
  color: var(--text-medium);
  font-size: 13px;
  border-bottom: none;
}

.mega-dropdown-column a:hover {
  color: var(--primary-color);
  background-color: transparent;
  padding-left: 5px;
}

/* ============================================
   Banner轮播
   ============================================ */

.banner {
  position: relative;
  height: 700px;
  overflow: hidden;
}

.banner-slider {
  position: relative;
  width: 100%;
  height: 100%;
}

.banner-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.8s ease;
}

.banner-slide.active {
  opacity: 1;
}

.banner-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.banner-content {
  position: absolute;
  top: 50%;
  left: 10%;
  transform: translateY(-50%);
  text-align: left;
  color: var(--white);
  z-index: 10;
  max-width: 600px;
}

.banner-content h1 {
  font-size: 48px;
  font-weight: bold;
  margin-bottom: 20px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.banner-content p {
  font-size: 20px;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  margin-bottom: 30px;
}

.banner-btn {
  display: inline-block;
  padding: 12px 32px;
  background-color: var(--primary-color);
  color: var(--white);
  border-radius: 25px;
  font-size: 16px;
  font-weight: 500;
  transition: var(--transition);
  text-decoration: none;
}

.banner-btn:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(3, 110, 184, 0.4);
}

.banner-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(3, 110, 184, 0.7) 0%, rgba(0, 0, 0, 0.3) 100%);
}

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

.banner-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: var(--transition);
}

.banner-dot.active {
  background-color: var(--white);
}

.banner-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  background-color: rgba(255, 255, 255, 0.3);
  color: var(--white);
  font-size: 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  z-index: 10;
  transition: var(--transition);
}

.banner-arrow:hover {
  background-color: rgba(255, 255, 255, 0.5);
}

.banner-arrow.prev {
  left: 20px;
}

.banner-arrow.next {
  right: 20px;
}

/* ============================================
   新版Banner - 轮播设计
   ============================================ */

.banner-new {
  position: relative;
  height: 800px;
  overflow: hidden;
  width: 100%;
}

.banner-new-slider {
  position: relative;
  width: 100%;
  height: 100%;
}

.banner-new-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.8s ease;
}

.banner-new-slide.active {
  opacity: 1;
}

.banner-new-container {
  display: flex;
  height: 100%;
  width: 100%;
  margin: 0;
  padding: 0;
  position: relative;
  z-index: 1;
}

.banner-video-wrapper {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  overflow: hidden;
}

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

.banner-new-right {
  width: 400px;
  display: flex;
  flex-direction: column;
  height: 100%;
  margin-left: auto;
}

.banner-new-right-overlay {
  position: absolute;
  right: 0;
  top: 0;
  height: 100%;
  z-index: 10;
}

.banner-new-panel {
  flex: 1;
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  transition: var(--transition);
}

.banner-new-panel:last-child {
  border-bottom: none;
}

.panel-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: var(--transition);
}

.banner-new-panel:hover .panel-bg {
  opacity: 1;
  transform: scale(1.1);
}

.panel-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 50, 100, 0.6);
  transition: var(--transition);
}

.banner-new-panel:hover .panel-overlay {
  background: rgba(0, 50, 100, 0.6);
}

.panel-content {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 15px;
  color: var(--white);
}

.panel-title {
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 2px;
}

.panel-arrow {
  font-size: 24px;
  transition: transform 0.3s ease;
}

.banner-new-panel:hover .panel-arrow {
  transform: translateX(5px);
}

/* 第二张：科技网格 + 发光效果 */
.banner-slide-tech {
  position: relative;
  overflow: hidden;
}

.tech-image-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  z-index: 1;
}

.tech-grid-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: radial-gradient(circle, rgba(0, 180, 216, 0.2) 1px, transparent 1px);
  background-size: 30px 30px;
  z-index: 2;
}

.tech-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(0, 30, 60, 0.75) 0%, rgba(0, 10, 20, 0.85) 100%);
  z-index: 3;
}

.tech-content {
  position: relative;
  z-index: 4;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  height: 100%;
  text-align: left;
  color: var(--white);
  padding: 0 100px 0 250px;
}

.tech-label {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(0, 180, 216, 0.2);
  border: 1px solid rgba(0, 180, 216, 0.4);
  border-radius: 20px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 2px;
  margin-bottom: 20px;
  color: #90e0ef;
}

.tech-content h1 {
  font-size: 46px;
  font-weight: 800;
  margin-bottom: 20px;
  line-height: 1.3;
  text-shadow: 0 0 15px rgba(0, 180, 216, 0.6), 0 0 30px rgba(0, 180, 216, 0.3);
}

.tech-content p {
  font-size: 18px;
  margin-bottom: 35px;
  opacity: 0.9;
  letter-spacing: 1px;
  text-shadow: 0 0 10px rgba(0, 180, 216, 0.4);
}

.tech-btn {
  display: inline-block;
  padding: 14px 36px;
  background: transparent;
  color: #90e0ef;
  border: 2px solid #00b4d8;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 600;
  transition: var(--transition);
  text-decoration: none;
  box-shadow: 0 0 15px rgba(0, 180, 216, 0.3);
  position: relative;
  overflow: hidden;
}

.tech-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 180, 216, 0.4), transparent);
  transition: left 0.5s ease;
}

.tech-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 0 25px rgba(0, 180, 216, 0.6);
  border-color: #90e0ef;
  color: #fff;
}

.tech-btn:hover::before {
  left: 100%;
}

/* 第三张：3D 悬浮空间 */
.banner-slide-innovation {
  position: relative;
  overflow: hidden;
}

.innovation-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  filter: brightness(0.6); /* 压暗背景 */
}

.innovation-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, rgba(0, 5, 15, 0.95) 0%, rgba(0, 15, 30, 0.6) 60%, rgba(0, 5, 15, 0.8) 100%);
  z-index: 1;
}

/* 悬浮粒子 */
.innovation-particles {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 2;
  pointer-events: none;
}

.particle {
  position: absolute;
  left: var(--x);
  top: var(--y);
  width: var(--size);
  height: var(--size);
  background: #00b4d8;
  border-radius: 50%;
  box-shadow: 0 0 10px #00b4d8, 0 0 20px #00b4d8;
  animation: floatParticle var(--duration) ease-in-out infinite;
  animation-delay: calc(var(--i) * -1s);
  opacity: 0.6;
}

@keyframes floatParticle {
  0%, 100% { transform: translateY(0) scale(1); opacity: 0.4; }
  50% { transform: translateY(-30px) scale(1.2); opacity: 0.8; }
}

.innovation-content {
  position: relative;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  height: 100%;
  padding: 0;
}

.innovation-text {
  flex: 0 0 auto;
  width: auto;
  color: var(--white);
  text-align: left;
  margin-left: 300px !important; /* 整体向右移动 150px (原 150 + 150) */
  margin-right: 0;
  z-index: 4;
}

.innovation-image-wrapper {
  position: relative;
  flex: 0 0 550px;
  width: 550px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 2;
  margin-left: 50px !important;
  margin-right: 0;
  transform: translateX(200px); /* 证书图片向右移动 200 像素 */
}

.innovation-text h2 {
  font-size: 64px;
  font-weight: 900;
  margin-bottom: 15px;
  line-height: 1.1;
  letter-spacing: 2px;
  text-shadow: 0 5px 15px rgba(0,0,0,0.5);
}

.innovation-text h3 {
  font-size: 64px;
  font-weight: 600;
  margin-bottom: 30px;
  color: #ffd700;
  letter-spacing: 4px;
  text-transform: uppercase;
  text-shadow: 0 2px 10px rgba(255, 215, 0, 0.3);
}

.innovation-text p {
  font-size: 18px;
  line-height: 1.8;
  opacity: 0.8;
  border-left: 3px solid #00b4d8;
  padding-left: 20px;
}

/* 底部光晕 */
.innovation-glow {
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 80%;
  height: 100px;
  background: radial-gradient(ellipse at center, rgba(0, 180, 216, 0.4) 0%, transparent 70%);
  filter: blur(15px);
  z-index: 1;
}

/* 图片容器 */
.innovation-image-3d {
  position: relative;
  z-index: 2;
  animation: float3D 6s ease-in-out infinite;
}

@keyframes float3D {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-15px); }
}

.innovation-image {
  position: relative;
  box-shadow: 
    0 20px 60px rgba(0, 0, 0, 0.8),
    0 0 30px rgba(0, 180, 216, 0.2);
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.innovation-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* 轮播控制 */
.banner-new-dots {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 10;
}

.banner-new-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: var(--transition);
}

.banner-new-dot.active {
  background-color: var(--white);
  transform: scale(1.2);
}

.banner-new-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 50px;
  height: 50px;
  background-color: rgba(255, 255, 255, 0.3);
  color: var(--white);
  font-size: 24px;
  display: flex;
  justify-content: center;
  align-items: center;
  cursor: pointer;
  z-index: 10;
  transition: var(--transition);
  border-radius: 50%;
}

.banner-new-arrow:hover {
  background-color: rgba(255, 255, 255, 0.5);
}

.banner-new-arrow.prev {
  left: 20px;
}

.banner-new-arrow.next {
  right: 20px;
}

/* ============================================
   通用板块样式
   ============================================ */

.section {
  padding: 80px 0;
}

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

.section-header h2 {
  font-size: 36px;
  color: var(--text-dark);
  margin-bottom: 15px;
}

.section-header p {
  font-size: 16px;
  color: var(--text-medium);
}

.section-header .divider {
  width: 60px;
  height: 3px;
  background-color: var(--primary-color);
  margin: 20px auto;
}

/* ============================================
   产品应用板块
   ============================================ */

.application-section {
  background-color: var(--white);
  padding: 80px 0;
}

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

.application-subtitle {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--primary-color);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.application-main-title {
  font-size: 40px;
  font-weight: 700;
  color: var(--text-dark);
  margin: 0 0 20px 0;
}

.application-desc {
  font-size: 14px;
  color: var(--text-medium);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

.application-grid-final {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 20px;
}

.application-column-right-final {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.application-card-final {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  display: block;
  text-decoration: none;
  height: 600px;
}

.card-wide-top,
.card-wide-bottom {
  height: 290px;
}

.application-card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.application-card-hover-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(3, 110, 184, 0.85) 0%, rgba(0, 50, 100, 0.9) 100%);
  opacity: 0;
  transition: var(--transition);
  z-index: 1;
}

.application-card-final:hover .application-card-hover-overlay {
  opacity: 1;
}

.application-card-final:hover .application-card-image {
  transform: scale(1.05);
}

.application-card-info {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 30px;
  z-index: 2;
}

.application-icon-box {
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 15px;
  border-radius: 2px;
}

.application-icon-box svg {
  width: 20px;
  height: 20px;
  stroke: var(--white);
  fill: none;
  stroke-width: 1.5;
}

.application-card-info h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--white);
  margin: 0 0 5px 0;
}

.application-card-info span {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  display: block;
  margin-bottom: 12px;
}

.application-yellow-line {
  width: 25px;
  height: 2px;
  background-color: #ffc107;
}

/* ============================================
   产品展示板块
   ============================================ */

.products-section {
  background-color: #f0f7fc;
}

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

.section-subtitle {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--primary-color);
  margin-bottom: 12px;
  text-transform: uppercase;
}

.section-main-title {
  font-size: 40px;
  font-weight: 700;
  color: var(--text-dark);
  margin: 0 0 20px 0;
}

.section-desc {
  font-size: 14px;
  color: var(--text-medium);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.8;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.product-card {
  background-color: var(--white);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  height: 400px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

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

.product-card-image {
  height: auto;
  padding: 20px 0;
  background-color: transparent;
  display: flex;
  justify-content: center;
  align-items: center;
}

.product-card-image img {
  width: 200px;
  height: auto;
  object-fit: contain;
}

.product-card:hover .product-card-image img {
  transform: none;
}

.product-card-image img {
  width: 200px;
  height: auto;
  object-fit: contain;
}

.product-card:hover .product-card-image img {
  transform: none;
}

.product-card-content {
  padding: 20px;
  text-align: center;
  margin-bottom: 40px;
}

.product-card-content h3 {
  font-size: 18px;
  color: var(--text-dark);
  margin-bottom: 10px;
}

.product-card-content p {
  font-size: 13px;
  color: var(--text-medium);
  margin-bottom: 15px;
}

.product-card-link {
  display: inline-block;
  padding: 8px 20px;
  background-color: var(--primary-color);
  color: var(--white);
  border-radius: 20px;
  font-size: 13px;
  transition: var(--transition);
}

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

/* ============================================
   最新消息与展览板块
   ============================================ */

.news-exhibition-section {
  background-color: var(--white);
  padding: 80px 0;
}

.news-exhibition-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

/* 通用列标题 */
.column-header {
  margin-bottom: 30px;
}

.column-title-en {
  font-size: 48px;
  font-weight: 800;
  color: var(--primary-color);
  margin: 0 0 5px 0;
  line-height: 1;
  letter-spacing: 1px;
}

.column-title-cn {
  font-size: 24px;
  font-weight: 500;
  color: var(--text-dark);
  margin: 0;
}

/* 左侧：最新消息 */
.news-tabs-new {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
}

.news-tab-btn {
  padding: 8px 20px;
  font-size: 14px;
  border: 1px solid var(--primary-color);
  background-color: var(--white);
  color: var(--primary-color);
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition);
}

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

.news-list-new {
  list-style: none;
  padding: 0;
  margin: 0 0 30px 0;
}

.news-list-new li {
  padding-bottom: 25px;
  margin-bottom: 25px;
  border-bottom: 1px solid #e0e0e0;
}

.news-list-new li:last-child {
  border-bottom: none;
}

.news-date {
  display: block;
  font-size: 16px;
  color: var(--primary-color);
  margin-bottom: 8px;
  font-weight: 500;
}

.news-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-dark);
  margin: 0 0 10px 0;
  line-height: 1.4;
  transition: var(--transition);
}

.news-list-new li:hover .news-title {
  color: var(--primary-color);
}

.news-desc {
  font-size: 14px;
  color: var(--text-medium);
  margin: 0;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 右侧：展览 */
.exhibition-slider-new {
  position: relative;
  margin-bottom: 30px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.exhibition-content-wrapper {
  flex: 1;
  background-color: var(--white);
  border-radius: 8px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
  overflow: hidden;
  min-height: 280px;
}

.exhibition-slide-new {
  display: none;
  animation: fadeIn 0.5s ease;
}

.exhibition-slide-new.active {
  display: block;
}

.exhibition-image {
  width: 100%;
  height: 260px;
  overflow: hidden;
}

.exhibition-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.exhibition-slide-new:hover .exhibition-image img {
  transform: scale(1.05);
}

.exhibition-text {
  padding: 20px 25px;
  text-align: center;
}

.exhibition-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-dark);
  margin: 0 0 8px 0;
  line-height: 1.4;
}

.exhibition-date {
  font-size: 13px;
  color: var(--primary-color);
  font-weight: 500;
}

.slider-arrow {
  width: 40px;
  height: 40px;
  background-color: var(--primary-color);
  color: var(--white);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

.slider-arrow svg {
  width: 18px;
  height: 18px;
  stroke: var(--white);
  fill: none;
  stroke-width: 2;
}

.slider-arrow:hover {
  background-color: var(--primary-dark);
}

/* 了解更多链接 */
.more-link-new {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--primary-color);
  font-size: 16px;
  font-weight: 500;
  text-decoration: none;
  padding-bottom: 5px;
  border-bottom: 2px solid var(--primary-color);
  transition: var(--transition);
}

.more-link-new:hover {
  gap: 10px;
  color: var(--primary-dark);
  border-color: var(--primary-dark);
}

.more-link-new span {
  font-size: 20px;
  line-height: 1;
}

/* ============================================
   联系我们板块
   ============================================ */

.contact-section {
  background-color: #f0f7fc;
  padding: 80px 0;
}

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

.contact-card {
  text-align: center;
  padding: 40px 20px;
  background-color: var(--white);
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
  transition: var(--transition);
}

.contact-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.contact-card-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background-color: var(--primary-color);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.contact-card-icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--white);
  fill: none;
  stroke-width: 1.5;
}

.contact-card h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: 10px;
}

.contact-card p {
  font-size: 15px;
  color: var(--text-medium);
  line-height: 1.5;
}

/* ============================================
   页脚
   ============================================ */

.footer {
  background-color: var(--primary-color);
  color: var(--white);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 30px;
  margin-bottom: 40px;
}

.footer-column h4 {
  font-size: 16px;
  margin-bottom: 20px;
  padding-bottom: 10px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
}

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

.footer-column ul li a {
  color: rgba(255, 255, 255, 0.8);
  font-size: 13px;
  transition: var(--transition);
}

.footer-column ul li a:hover {
  color: var(--white);
  padding-left: 5px;
}

.footer-contact p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 13px;
  margin-bottom: 8px;
}

.footer-qrcode {
  margin-top: 20px;
}

.footer-qrcode img {
  width: 100px;
  height: 100px;
  background-color: var(--white);
  padding: 5px;
  border-radius: 4px;
}

.footer-qrcode p {
  font-size: 12px;
  margin-top: 10px;
  color: rgba(255, 255, 255, 0.8);
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

/* 回到顶部 */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 40px;
  height: 40px;
  background-color: var(--primary-color);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 18px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--primary-dark);
}

/* ============================================
   内页通用样式
   ============================================ */

/* 内页Banner */
.page-banner {
  height: 300px;
  position: relative;
  overflow: hidden;
}

.page-banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-banner-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(3, 110, 184, 0.8) 0%, rgba(0, 0, 0, 0.5) 100%);
  display: flex;
  justify-content: center;
  align-items: center;
}

.page-banner-content {
  text-align: center;
  color: var(--white);
}

.page-banner-content h1 {
  font-size: 42px;
  margin-bottom: 15px;
}

.page-banner-content p {
  font-size: 18px;
  opacity: 0.9;
}

/* 面包屑导航 */
.breadcrumb {
  padding: 20px 0;
  background-color: var(--bg-light);
  border-bottom: 1px solid var(--border-color);
}

.breadcrumb .container {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-medium);
}

.breadcrumb a {
  color: var(--text-medium);
}

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

.breadcrumb .separator {
  color: var(--text-light);
}

/* 内页内容区 */
.page-content {
  padding: 40px 0;
}

/* ============================================
   关于我们页面
   ============================================ */

.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.about-intro-image {
  border-radius: 8px;
  overflow: hidden;
}

.about-intro-image img {
  width: 100%;
  height: 400px;
  object-fit: cover;
}

.about-intro-content h2 {
  font-size: 32px;
  color: var(--text-dark);
  margin-bottom: 20px;
}

.about-intro-content p {
  font-size: 15px;
  color: var(--text-medium);
  line-height: 1.8;
  margin-bottom: 15px;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  margin-top: 60px;
}

.about-stat {
  text-align: center;
  padding: 30px;
  background-color: var(--bg-light);
  border-radius: 8px;
}

.about-stat-number {
  font-size: 48px;
  font-weight: bold;
  color: var(--primary-color);
  margin-bottom: 10px;
}

.about-stat-label {
  font-size: 14px;
  color: var(--text-medium);
}

/* 发展历程板块 */
.history-section {
  background-color: var(--bg-light);
  padding: 80px 0;
}

/* 时间轴导航 */
.history-timeline-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-bottom: 50px;
  position: relative;
  width: 100%;
  max-width: 100%;
}

.timeline-items {
  display: flex;
  align-items: center;
  gap: 0;
  position: relative;
  flex: 1;
  justify-content: center;
}

.timeline-items::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 2px;
  background-color: #d0d0d0;
  transform: translateY(-50%);
  z-index: 0;
}

.timeline-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
  position: relative;
  z-index: 1;
  padding: 0 40px;
  transition: var(--transition);
}

.timeline-dot {
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background-color: #999999;
  border: 3px solid var(--bg-light);
  margin-bottom: 10px;
  transition: var(--transition);
  position: relative;
}

.timeline-year {
  font-size: 16px;
  font-weight: 500;
  color: #999999;
  transition: var(--transition);
}

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

.timeline-item:hover .timeline-year,
.timeline-item.active .timeline-year {
  color: var(--primary-color);
  font-weight: 700;
}

/* 时间轴箭头 */
.timeline-arrow {
  width: 40px;
  height: 40px;
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

.timeline-arrow svg {
  width: 18px;
  height: 18px;
  stroke: var(--text-medium);
  fill: none;
  stroke-width: 2;
}

.timeline-arrow:hover {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.timeline-arrow:hover svg {
  stroke: var(--white);
}

.timeline-arrow.disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* 内容展示区 */
.history-content-wrapper {
  position: relative;
  max-width: 100%;
  margin: 0 auto;
  min-height: 400px;
  padding: 0 20px;
}

.history-content {
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
  animation: fadeIn 0.5s ease;
}

.history-content.active {
  display: grid;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.history-image {
  overflow: hidden;
}

.history-image img {
  width: 600px;
  height: 350px;
  object-fit: cover;
  transition: var(--transition);
}

.history-image:hover img {
  transform: scale(1.05);
}

.history-text {
  margin-left: -220px;
}

.history-text h3 {
  font-size: 28px;
  color: var(--primary-color);
  margin-bottom: 20px;
  font-weight: 700;
}

.history-text p {
  font-size: 16px;
  color: var(--text-medium);
  line-height: 1.8;
}

/* 企业文化板块 */
.culture-section {
  padding: 80px 0;
}

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

.culture-card {
  text-align: center;
  padding: 40px 20px;
  background: var(--bg-light);
  border-radius: 8px;
  transition: var(--transition);
}

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

.culture-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background-color: var(--primary-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.culture-icon svg {
  width: 32px;
  height: 32px;
  stroke: var(--white);
  fill: none;
  stroke-width: 1.5;
}

.culture-card h3 {
  font-size: 20px;
  color: var(--primary-color);
  margin-bottom: 15px;
  font-weight: 600;
}

.culture-card p {
  font-size: 14px;
  color: var(--text-medium);
  line-height: 1.8;
}

/* 专利证书板块 */
.certificate-section {
  background-color: var(--bg-light);
  padding: 80px 0;
}

.certificate-slider {
  display: flex;
  align-items: center;
  gap: 20px;
  position: relative;
}

.certificate-track-wrapper {
  flex: 1;
  overflow: hidden;
  border-radius: 8px;
}

.certificate-track {
  display: flex;
  gap: 20px;
  transition: transform 0.5s ease;
}

.certificate-card {
  flex: 0 0 calc(20% - 16px);
  min-width: 0;
  background-color: var(--white);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

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

.certificate-image {
  width: 100%;
  height: 200px;
  overflow: hidden;
  background-color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 15px;
}

.certificate-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: var(--transition);
}

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

.certificate-title {
  padding: 15px;
  text-align: center;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-dark);
  background-color: var(--white);
}

.cert-arrow {
  width: 44px;
  height: 44px;
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

.cert-arrow svg {
  width: 18px;
  height: 18px;
  stroke: var(--text-medium);
  fill: none;
  stroke-width: 2;
}

.cert-arrow:hover {
  background-color: var(--primary-color);
  border-color: var(--primary-color);
}

.cert-arrow:hover svg {
  stroke: var(--white);
}

.cert-arrow.disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* ============================================
   产品中心页面
   ============================================ */

.category-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-bottom: 40px;
}

.category-card {
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  transition: var(--transition);
  text-align: center;
}

.category-card:hover {
  border-color: var(--primary-color);
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.category-card-image {
  height: 180px;
  background-color: transparent;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

.category-card-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 10px;
  transition: var(--transition);
}

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

.category-card-content {
  padding: 15px;
}

.category-card-content h4 {
  font-size: 15px;
  color: var(--text-dark);
}

/* 产品列表 */
.product-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 25px;
}

.product-list-item {
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  transition: var(--transition);
}

.product-list-item:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.product-list-item-image {
  height: 180px;
  background-color: transparent;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
}

.product-list-item-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  padding: 10px;
  transition: var(--transition);
}

.product-list-item:hover .product-list-item-image img {
  transform: none;
}

.product-list-item-content {
  padding: 15px;
}

.product-list-item-content h4 {
  font-size: 14px;
  color: var(--text-dark);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-list-item-content p {
  font-size: 12px;
  color: var(--text-light);
}

/* ============================================
   产品详情页面
   ============================================ */

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

.product-detail-gallery {
  position: relative;
}

.product-detail-main-image {
  width: 100%;
  height: 400px;
  background-color: var(--bg-light);
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 15px;
}

.product-detail-main-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-detail-thumbs {
  display: flex;
  gap: 10px;
}

.product-detail-thumb {
  width: 80px;
  height: 80px;
  border: 2px solid var(--border-color);
  border-radius: 6px;
  overflow: hidden;
  cursor: pointer;
  transition: var(--transition);
}

.product-detail-thumb.active,
.product-detail-thumb:hover {
  border-color: var(--primary-color);
}

.product-detail-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-detail-info h1 {
  font-size: 28px;
  color: var(--text-dark);
  margin-bottom: 15px;
}

.product-detail-info .description {
  font-size: 15px;
  color: var(--text-medium);
  line-height: 1.8;
  margin-bottom: 25px;
  padding-bottom: 25px;
  border-bottom: 1px solid var(--border-color);
}

.product-detail-specs {
  margin-bottom: 25px;
}

.product-detail-specs h3 {
  font-size: 18px;
  color: var(--text-dark);
  margin-bottom: 15px;
}

.product-detail-specs table {
  width: 100%;
  border-collapse: collapse;
}

.product-detail-specs table td {
  padding: 12px 15px;
  border-bottom: 1px solid var(--border-color);
  font-size: 14px;
}

.product-detail-specs table td:first-child {
  width: 120px;
  color: var(--text-medium);
  background-color: var(--bg-light);
}

.product-detail-download {
  display: flex;
  gap: 15px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 25px;
  background-color: var(--primary-color);
  color: var(--white);
  border-radius: 6px;
  font-size: 14px;
  transition: var(--transition);
}

.download-btn:hover {
  background-color: var(--primary-dark);
}

.download-btn.secondary {
  background-color: var(--white);
  color: var(--primary-color);
  border: 1px solid var(--primary-color);
}

.download-btn.secondary:hover {
  background-color: var(--bg-light);
}

/* 产品详情展示 */
.product-detail-description {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--border-color);
}

.product-detail-description h3 {
  font-size: 24px;
  color: var(--text-dark);
  margin-bottom: 30px;
  text-align: center;
}

.description-content {
  /* 移除最大宽度和居中，与页面对齐 */
}

.description-content h4 {
  font-size: 18px;
  color: var(--primary-color);
  margin: 30px 0 15px;
}

.description-content p {
  font-size: 15px;
  color: var(--text-medium);
  line-height: 1.8;
  margin-bottom: 15px;
}

.description-content ul {
  margin: 15px 0;
  padding-left: 20px;
}

.description-content ul li {
  font-size: 15px;
  color: var(--text-medium);
  line-height: 1.8;
  margin-bottom: 8px;
  position: relative;
  padding-left: 15px;
}

.description-content ul li::before {
  content: '•';
  position: absolute;
  left: 0;
  color: var(--primary-color);
}

.description-content img {
  width: 100%;
  max-width: 600px;
  height: auto;
  display: block;
  margin: 20px auto;
  border-radius: 8px;
}

.description-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin: 30px 0;
}

.feature-item {
  text-align: center;
  padding: 20px;
  background-color: var(--bg-light);
  border-radius: 8px;
}

.feature-item .feature-icon {
  font-size: 32px;
  margin-bottom: 10px;
}

.feature-item h5 {
  font-size: 16px;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.feature-item p {
  font-size: 13px;
  color: var(--text-medium);
  margin: 0;
}

/* 相关产品 */
.related-products {
  margin-top: 60px;
}

.related-products h3 {
  font-size: 24px;
  color: var(--text-dark);
  margin-bottom: 30px;
  text-align: center;
}

/* ============================================
   应用页面
   ============================================ */

.application-list {
  display: flex;
  flex-direction: column;
  gap: 60px;
}

.application-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.application-item:nth-child(even) {
  direction: rtl;
}

.application-item:nth-child(even) > * {
  direction: ltr;
}

.application-item-image {
  border-radius: 8px;
  overflow: hidden;
}

.application-item-image img {
  width: 100%;
  height: 350px;
  object-fit: cover;
}

.application-item-content h3 {
  font-size: 28px;
  color: var(--text-dark);
  margin-bottom: 15px;
}

.application-item-content p {
  font-size: 15px;
  color: var(--text-medium);
  line-height: 1.8;
  margin-bottom: 20px;
}

.application-item-content ul {
  margin-bottom: 25px;
}

.application-item-content ul li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  font-size: 14px;
  color: var(--text-medium);
}

.application-item-content ul li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary-color);
}

/* ============================================
   应用详情页面
   ============================================ */

.application-detail-content {
  max-width: 900px;
  margin: 0 auto;
}

.application-detail-content h2 {
  font-size: 24px;
  color: var(--text-dark);
  margin-bottom: 20px;
}

.application-detail-content p {
  font-size: 15px;
  color: var(--text-medium);
  line-height: 1.8;
  margin-bottom: 15px;
}

.application-detail-content img {
  width: 100%;
  border-radius: 8px;
  margin: 30px 0;
}

/* ============================================
   最新消息页面
   ============================================ */

.news-filter {
  display: flex;
  gap: 10px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.news-filter-btn {
  padding: 10px 25px;
  background-color: var(--white);
  color: var(--text-medium);
  border: 1px solid var(--border-color);
  border-radius: 25px;
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
}

.news-filter-btn.active,
.news-filter-btn:hover {
  background-color: var(--primary-color);
  color: var(--white);
  border-color: var(--primary-color);
}

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

.news-card {
  background-color: var(--white);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

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

.news-card-image {
  height: 200px;
  overflow: hidden;
}

.news-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

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

.news-card-content {
  padding: 20px;
}

.news-card-content h4 {
  font-size: 16px;
  color: var(--text-dark);
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card-content p {
  font-size: 13px;
  color: var(--text-medium);
  margin-bottom: 15px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card-meta {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-light);
}

/* 分页 */
.pagination {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 50px;
}

.pagination-btn {
  width: 40px;
  height: 40px;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: var(--white);
  color: var(--text-medium);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
}

.pagination-btn:hover,
.pagination-btn.active {
  background-color: var(--primary-color);
  color: var(--white);
  border-color: var(--primary-color);
}

/* ============================================
   新闻详情页面
   ============================================ */

.news-detail-content {
  max-width: 800px;
  margin: 0 auto;
}

.news-detail-header {
  margin-bottom: 30px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--border-color);
}

.news-detail-header h1 {
  font-size: 32px;
  color: var(--text-dark);
  margin-bottom: 15px;
}

.news-detail-meta {
  display: flex;
  gap: 20px;
  font-size: 13px;
  color: var(--text-light);
}

.news-detail-body {
  font-size: 15px;
  color: var(--text-medium);
  line-height: 1.8;
}

.news-detail-body p {
  margin-bottom: 15px;
}

.news-detail-body img {
  width: 100%;
  border-radius: 8px;
  margin: 20px 0;
}

.news-detail-body h2 {
  font-size: 22px;
  color: var(--text-dark);
  margin: 30px 0 15px;
}

.news-detail-body h3 {
  font-size: 18px;
  color: var(--text-dark);
  margin: 25px 0 12px;
}

/* 相关文章 */
.related-news {
  margin-top: 60px;
  padding-top: 40px;
  border-top: 1px solid var(--border-color);
}

.related-news h3 {
  font-size: 24px;
  color: var(--text-dark);
  margin-bottom: 30px;
  text-align: center;
}

/* ============================================
   企业社会责任页面
   ============================================ */

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

.csr-card {
  background-color: var(--white);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

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

.csr-card-image {
  height: 200px;
  overflow: hidden;
}

.csr-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

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

.csr-card-content {
  padding: 25px;
}

.csr-card-content h4 {
  font-size: 18px;
  color: var(--text-dark);
  margin-bottom: 12px;
}

.csr-card-content p {
  font-size: 14px;
  color: var(--text-medium);
  line-height: 1.6;
  margin-bottom: 15px;
}

.csr-card-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--primary-color);
  font-size: 14px;
  transition: var(--transition);
}

.csr-card-link:hover {
  gap: 10px;
}

/* ============================================
   CSR详情页面
   ============================================ */

.csr-detail-content {
  max-width: 800px;
  margin: 0 auto;
}

.csr-detail-header {
  margin-bottom: 30px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--border-color);
}

.csr-detail-header h1 {
  font-size: 32px;
  color: var(--text-dark);
  margin-bottom: 15px;
}

.csr-detail-meta {
  font-size: 13px;
  color: var(--text-light);
}

.csr-detail-body {
  font-size: 15px;
  color: var(--text-medium);
  line-height: 1.8;
}

.csr-detail-body p {
  margin-bottom: 15px;
}

.csr-detail-body img {
  width: 100%;
  border-radius: 8px;
  margin: 20px 0;
}

/* ============================================
   下载专区页面
   ============================================ */

.download-filter {
  display: flex;
  gap: 10px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}

.download-filter-btn {
  padding: 10px 25px;
  background-color: var(--white);
  color: var(--text-medium);
  border: 1px solid var(--border-color);
  border-radius: 25px;
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  display: inline-block;
}

.download-filter-btn.active,
.download-filter-btn:hover {
  background-color: var(--primary-color);
  color: var(--white);
  border-color: var(--primary-color);
}

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

.download-card {
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 25px;
  text-align: center;
  transition: var(--transition);
}

.download-card:hover {
  box-shadow: var(--shadow-hover);
  border-color: var(--primary-color);
}

.download-card-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 15px;
  background-color: var(--bg-light);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 24px;
  color: var(--primary-color);
}

.download-card h4 {
  font-size: 15px;
  color: var(--text-dark);
  margin-bottom: 10px;
}

.download-card p {
  font-size: 13px;
  color: var(--text-medium);
  margin-bottom: 15px;
}

.download-card-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 8px 20px;
  background-color: var(--primary-color);
  color: var(--white);
  border-radius: 20px;
  font-size: 13px;
  transition: var(--transition);
}

.download-card-btn:hover {
  background-color: var(--primary-dark);
}

/* ============================================
   联系我们页面
   ============================================ */

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

.contact-location {
  margin-bottom: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border-color);
}

.contact-location:last-child {
  margin-bottom: 0;
  padding-bottom: 0;
  border-bottom: none;
}

.contact-location h4 {
  font-size: 20px;
  color: var(--primary-color);
  margin-bottom: 20px;
  font-weight: 600;
}

.contact-info {
  padding: 40px;
  background-color: var(--bg-light);
  border-radius: 8px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}

.contact-info > h3 {
  grid-column: 1 / -1;
}

.contact-info h3 {
  font-size: 24px;
  color: var(--text-dark);
  margin-bottom: 30px;
}

.contact-info-item {
  display: flex;
  gap: 15px;
  margin-bottom: 25px;
}

.contact-info-icon {
  width: 50px;
  height: 50px;
  background-color: var(--primary-color);
  border-radius: 50%;
  display: flex;
  justify-content: center;
  align-items: center;
  color: var(--white);
  font-size: 20px;
  flex-shrink: 0;
}

.contact-info-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--white);
  fill: none;
  stroke-width: 1.5;
}

.contact-info-content h4 {
  font-size: 16px;
  color: var(--text-dark);
  margin-bottom: 5px;
}

.contact-info-content p {
  font-size: 14px;
  color: var(--text-medium);
}

.contact-form {
  padding: 40px;
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: 8px;
}

.contact-form h3 {
  font-size: 24px;
  color: var(--text-dark);
  margin-bottom: 30px;
}

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

.form-group label {
  display: block;
  font-size: 14px;
  color: var(--text-dark);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 14px;
  transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary-color);
}

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

.form-submit {
  width: 100%;
  padding: 14px;
  background-color: var(--primary-color);
  color: var(--white);
  border-radius: 6px;
  font-size: 16px;
  transition: var(--transition);
}

.form-submit:hover {
  background-color: var(--primary-dark);
}

.contact-map {
  margin-top: 30px;
  border-radius: 8px;
  overflow: hidden;
  height: 400px;
}

.contact-map iframe {
  width: 100%;
  height: 100%;
  border: none;
}

/* ============================================
   响应式设计
   ============================================ */

/* 移动端汉堡菜单按钮 */
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 1001;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--text-dark);
  margin: 3px 0;
  transition: var(--transition);
}

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

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* 移动端菜单覆盖层 */
.mobile-menu-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 998;
  opacity: 0;
  transition: opacity 0.3s ease;
}

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

/* 移动端侧边菜单 */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  right: -300px;
  width: 300px;
  height: 100%;
  background-color: var(--white);
  z-index: 999;
  overflow-y: auto;
  transition: right 0.3s ease;
  box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
}

.mobile-menu.active {
  right: 0;
}

  .mobile-menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    background-color: var(--primary-color);
    color: var(--white);
  }
  .mobile-menu-header .mobile-logo {
    display: flex;
    align-items: center;
  }
  .mobile-menu-header .mobile-logo img {
    height: 30px;
    width: auto;
    filter: brightness(0) invert(1);
  }
  .mobile-menu-header h3 {
    font-size: 18px;
    margin: 0;
  }

.mobile-menu-close {
  background: none;
  border: none;
  color: var(--white);
  font-size: 24px;
  cursor: pointer;
  padding: 0;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-menu-nav {
  padding: 10px 0;
}

.mobile-menu-item {
  border-bottom: 1px solid var(--border-color);
}

.mobile-menu-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
  color: var(--text-dark);
  font-size: 15px;
  text-decoration: none;
  transition: var(--transition);
}

.mobile-menu-link:hover {
  background-color: var(--bg-light);
  color: var(--primary-color);
}

.mobile-menu-arrow {
  width: 10px;
  height: 10px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg);
  transition: transform 0.3s ease;
}

.mobile-menu-item.open .mobile-menu-arrow {
  transform: rotate(-135deg);
}

.mobile-submenu {
  display: none;
  background-color: var(--bg-light);
  padding: 10px 0;
}

.mobile-menu-item.open .mobile-submenu {
  display: block;
}

.mobile-submenu-link {
  display: block;
  padding: 12px 30px;
  color: var(--text-medium);
  font-size: 14px;
  text-decoration: none;
  transition: var(--transition);
}

.mobile-submenu-link:hover {
  color: var(--primary-color);
  background-color: var(--white);
}

.mobile-submenu-title {
  display: block;
  padding: 12px 30px;
  color: var(--primary-color);
  font-size: 14px;
  font-weight: 600;
  border-bottom: 1px solid var(--border-color);
}

@media (max-width: 1024px) {
  .products-grid,
  .product-list,
  .download-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .footer-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .mega-dropdown .dropdown-menu {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 768px) {
  /* 顶部导航适配 - 手机端置顶 */
  .top-nav { 
    height: 35px; 
    position: sticky !important; 
    top: 0 !important; 
    z-index: 1001 !important;
  }
  .top-nav-menu { display: flex; justify-content: center; gap: 15px; font-size: 12px; }
  
  /* 二级导航：Logo与导航按钮同行 - 紧跟顶部导航下方置顶 */
  .sub-nav { 
    height: auto; 
    padding: 8px 0; 
    position: sticky !important; 
    top: 35px !important; 
    z-index: 1000 !important; 
  }
  .sub-nav .container { display: flex; justify-content: space-between; align-items: center; padding: 0 15px; }
  .sub-nav-left { flex: 0 0 auto; }
  .sub-nav-logo img { width: 120px; height: auto; }
  .sub-nav-menu { display: none; }
  .sub-nav-right { display: flex; align-items: center; gap: 10px; }
  
  /* 汉堡菜单按钮 - 放入导航栏内跟随滚动 */
  .mobile-menu-btn {
    display: flex !important;
    width: 36px;
    height: 36px;
    background: var(--white);
    border-radius: 4px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    padding: 0;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
    flex-shrink: 0;
    margin-left: 10px;
  }
  .mobile-menu-btn span { 
    background-color: var(--text-dark); 
    width: 20px; 
    height: 2px; 
    margin: 3px auto; 
    display: block;
    transition: var(--transition);
  }
  .mobile-menu-btn.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
  .mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
  .mobile-menu-btn.active span:nth-child(3) { transform: rotate(-45deg) translate(7px, -6px); }
  
  /* 移动端菜单 - 确保层级最高且可点击 */
  .mobile-menu { 
    z-index: 10001 !important; 
    width: 85%; 
    max-width: 300px; 
    right: -300px;
    display: block !important;
    visibility: hidden;
    opacity: 0;
    transition: right 0.3s ease, visibility 0.3s ease, opacity 0.3s ease;
    height: 100vh !important;
    overflow-y: auto !important;
    padding-bottom: 50px;
  }
  .mobile-menu.active { 
    right: 0; 
    visibility: visible;
    opacity: 1;
  }
  .mobile-menu-overlay { 
    z-index: 10000 !important; 
    display: block !important; 
    opacity: 0; 
    visibility: hidden;
    pointer-events: none; 
    transition: opacity 0.3s, visibility 0.3s; 
  }
  .mobile-menu-overlay.active { 
    opacity: 1; 
    visibility: visible;
    pointer-events: auto; 
  }
  
  /* 菜单项点击修复 */
  .mobile-menu-link, 
  .mobile-submenu-link,
  .mobile-menu-close,
  .mobile-menu-header {
    pointer-events: auto !important;
    touch-action: manipulation;
    -webkit-tap-highlight-color: rgba(3, 110, 184, 0.1);
  }
  .mobile-menu-link {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
    color: var(--text-dark);
    font-size: 15px;
    text-decoration: none;
    transition: var(--transition);
  }
  .mobile-menu-link:active {
    background-color: var(--bg-light);
  }
  
  /* Banner 响应式调整 */
  .banner-new { height: 500px; min-height: unset; }
  .banner-new-container { flex-direction: column; }
  .banner-new-right { flex-direction: row; width: 100%; height: auto; overflow-x: auto; -webkit-overflow-scrolling: touch; }
  .banner-new-panel { min-height: 80px; flex: 1; min-width: 0; border-bottom: none; border-right: 1px solid rgba(255,255,255,0.2); }
  .banner-new-panel:last-child { border-right: none; }
  .panel-title { font-size: 14px; letter-spacing: 1px; }
  .panel-arrow { font-size: 18px; }
  
  /* Banner 轮播适配 */
  .banner-new-slide { position: absolute; top: 0; left: 0; width: 100%; height: 100%; opacity: 1; display: none; }
  .banner-new-slide.active { display: block; }
  .banner-new-dots { bottom: 10px; }
  .banner-new-arrow { display: none; }
  
  .tech-content { padding: 20px; text-align: center; align-items: center; }
  .tech-content h1 { font-size: 22px; margin-bottom: 10px; }
  .tech-content p { font-size: 14px; margin-bottom: 15px; }
  .tech-btn { padding: 10px 20px; font-size: 14px; }
  
  .innovation-content { flex-direction: column; padding: 20px; align-items: center; text-align: center; }
  .innovation-text { margin: 0 !important; width: 100%; }
  .innovation-text h2 { font-size: 28px; margin-bottom: 5px; }
  .innovation-text h3 { font-size: 28px; margin-bottom: 15px; }
  .innovation-text p { font-size: 14px; padding-left: 0; border-left: none; border-top: 2px solid #00b4d8; padding-top: 10px; }
  .innovation-image-wrapper { transform: none !important; margin: 20px auto 0; width: 90%; max-width: 300px; }
  .innovation-particles { display: none; }
  
  /* 通用板块间距调整 */
  .section { padding: 40px 0; }
  .section-header { margin-bottom: 30px; }
  .section-header h2 { font-size: 24px; }
  
  .application-grid-final { grid-template-columns: 1fr; gap: 15px; }
  .application-card-final { height: 200px; }
  .card-wide-top, .card-wide-bottom { height: 200px; }
  
  .products-grid, .product-list, .news-grid, .csr-grid, .download-grid, .category-grid { grid-template-columns: 1fr; gap: 15px; }
  .news-exhibition-wrapper { grid-template-columns: 1fr; gap: 30px; }
  .contact-grid { grid-template-columns: 1fr; }
  /* 页尾响应式紧凑化 */
  .footer { padding: 30px 0 15px; }
  .footer-grid { 
    grid-template-columns: repeat(2, 1fr); 
    gap: 20px; 
    margin-bottom: 20px; 
  }
  .footer-column h4 { 
    font-size: 14px; 
    margin-bottom: 10px; 
    padding-bottom: 5px; 
  }
  .footer-column ul li { margin-bottom: 5px; }
  .footer-column ul li a { font-size: 12px; }
  .footer-contact p { font-size: 12px; margin-bottom: 5px; }
  .footer-qrcode { margin-top: 10px; }
  .footer-qrcode img { width: 80px; height: 80px; }
  .footer-qrcode p { font-size: 11px; margin-top: 5px; }
  .footer-bottom { padding-top: 15px; font-size: 11px; }
}

@media (max-width: 480px) {
  .sub-nav-logo img { width: 100px; }
  .mobile-menu-btn { top: 38px; right: 10px; width: 32px; height: 32px; }
  .mobile-menu-btn span { width: 18px; height: 2px; margin: 2px auto; }
  
  .banner-new { height: 400px; }
  .banner-new-panel { min-height: 70px; }
  .panel-title { font-size: 13px; }
  
  /* 小屏页尾进一步紧凑 */
  .footer { padding: 20px 0 10px; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 15px; margin-bottom: 15px; }
  .footer-column h4 { font-size: 13px; margin-bottom: 8px; }
  .footer-bottom { padding-top: 10px; font-size: 10px; }
  .about-stats { grid-template-columns: 1fr; }
  
  .tech-content h1 { font-size: 18px; }
  .innovation-text h2 { font-size: 24px; }
  .innovation-text h3 { font-size: 24px; }
}

@media (max-width: 480px) {
  .sub-nav-logo img { width: 100px; }
  .mobile-menu-btn { top: 38px; right: 10px; width: 32px; height: 32px; }
  .mobile-menu-btn span { width: 18px; height: 2px; margin: 2px auto; }
  
  .banner-new-panel { min-height: 70px; }
  .panel-title { font-size: 13px; }
  
  .footer-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: 1fr; }
  
  .tech-content h1 { font-size: 18px; }
  .innovation-text h2 { font-size: 24px; }
  .innovation-text h3 { font-size: 24px; }
}

/* ============================================
   动画效果
   ============================================ */

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

@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

.animate-fade-in {
  animation: fadeIn 0.6s ease forwards;
}

/* 加载动画 */
.loading {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 200px;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--border-color);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ============================================
   分类区块样式（大标题+产品展示）
   ============================================ */

.category-sections {
  display: flex;
  flex-direction: column;
  gap: 50px;
}

.category-section {
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 40px;
}

.category-section:last-child {
  border-bottom: none;
}

.category-section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-dark);
  margin-bottom: 25px;
  padding-left: 15px;
  border-left: 4px solid var(--primary-color);
}

.category-section-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
}

.section-product-card {
  background-color: var(--white);
  border: 1px solid var(--border-color);
  border-radius: 8px;
  overflow: hidden;
  transition: var(--transition);
  text-decoration: none;
}

.section-product-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
  border-color: var(--primary-color);
}

.section-product-image {
  height: 180px;
  display: flex;
  justify-content: center;
  align-items: center;
  overflow: hidden;
  background-color: var(--bg-gray);
  padding: 15px;
}

.section-product-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: var(--transition);
}

.section-product-card:hover .section-product-image img {
  transform: scale(1.05);
}

.section-product-info {
  padding: 12px;
  text-align: center;
  background-color: var(--white);
}

.section-product-model {
  font-size: 13px;
  color: var(--text-dark);
  font-weight: 500;
  margin: 0;
}

/* 响应式 */
@media (max-width: 1400px) {
  .category-section-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

@media (max-width: 1200px) {
  .category-section-grid {
  grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 992px) {
  .category-section-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .category-section-title {
    font-size: 20px;
  }
}

@media (max-width: 768px) {
  .category-sections {
    gap: 35px;
  }
  .category-section-grid {
    grid-template-columns: 1fr;
    gap: 15px;
  }
  .section-product-image {
    height: 140px;
  }
}

@media (max-width: 576px) {
  .category-section-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .section-product-image {
    height: 120px;
    padding: 10px;
  }
  .category-section-title {
    font-size: 18px;
    margin-bottom: 18px;
  }
}