/* 基础设置 */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: 'Microsoft YaHei', sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #fff;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1rem;
}

.leftfix {
  float: left;
}

.rightfix {
  float: right;
}

.clearfix::after {
  content: "";
  display: block;
  clear: both;
}

a {
  color: #666;
  text-decoration: none;
  outline: none;
  transition: color 0.3s ease;
}

a:hover {
  color: #002fff;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

button {
  border: none;
  padding: 0;
  font: inherit;
  cursor: pointer;
  outline: inherit;
  background: none;
}

dl, dt, dd {
  margin: 0;
  padding: 0;
}

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

/* 顶部导航条 */
.topbar {
  height: 30px;
  background-color: #ececec;
  color: #666;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.welcome {
  height: 30px;
  line-height: 30px;
  font-size: 0;
}

.welcome span, .welcome a {
  font-size: 12px;
}

.welcome .hello {
  margin-right: 28px;
}

.welcome .login {
  padding-right: 10px;
  border-right: 1px solid #666;
}

.welcome .register {
  padding-left: 10px;
}

.topbar-nav {
  font-size: 0;
}

.topbar-nav .list {
  height: 30px;
  line-height: 30px;
}

.topbar-nav .list li {
  float: left;
  font-size: 12px;
}

.topbar-nav .list li a {
  padding: 0 10px;
  border-right: 1px solid #666;
  font-size: 12px;
}

.topbar-nav .list li:first-child > a {
  padding-left: 0;
}

.topbar-nav .list li:last-child > a {
  padding-right: 0;
  border: 0;
}

/* 主导航 */
.main-content {
  height: 120px;
  position: sticky;
  top: 0;
  z-index: 9999;
  background-color: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 1rem;
  height: 100%;
}

.nav-menu {
  flex: 1;
  display: flex;
  justify-content: center;
}

.main-nav {
  display: flex;
  gap: 0.5rem;
  list-style: none;
}

.nav-item {
  position: relative;
  padding: 0.5rem;
}

.nav-item > a {
  font-size: 1rem;
  font-weight: 500;
  color: #000;
  padding: 0.5rem 1rem;
  text-decoration: none;
  transition: all 0.3s ease;
  white-space: nowrap;
}

.nav-item > a:hover {
  font-weight: 700;
  color: #002fff;
  text-decoration: underline;
  text-underline-offset: 0.5em;
}

.sub-nav > li {
  height: 50px;
  line-height: 50px;
  border-bottom: 1px solid #fff;
}

.sub-nav > li > a {
  font-size: 16px;
  color: #fff;
  padding: 0 10px;
}

.sub-nav > li:last-child {
  border-bottom: none;
}

.sub-nav {
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
  list-style: none;
  min-width: 160px;
  width: 220px;
  text-align: center;
  background-color: #2d2d2d;
  position: absolute;
  border-radius: 6px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease, top 0.3s ease;
  top: 120%;
  left: 50%;
  transform: translateX(-50%);
  margin-top: 5px;
}

.nav-item:hover .sub-nav {
  visibility: visible;
  opacity: 1;
  top: 100%;
}

.sub-nav > li:hover {
  background-color: #ececec;
  border-bottom-color: #ececec;
}

.sub-nav > li:hover > a {
  color: #000;
  font-weight: 700;
}

.phone {
  position: relative;
  height: 100%;
  display: flex;
  align-items: center;
  padding: 0 1rem;
}

.phone span {
  font-size: 1rem;
  letter-spacing: 0.1em;
  white-space: nowrap;
}

.main-content .logo-container {
  position: relative;
  height: 8vh;
  width: 15vw;
  min-width: 150px;
}

.main-content .logo {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 2;
}

.main-content .logo a {
  display: block;
  transition: inherit;
}

.main-content .logo img {
  width: 100%;
  max-width: 120px;
  height: auto;
  vertical-align: middle;
}

.main-content .slogan {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translateX(-50%);
  width: 100%;
  text-align: center;
  color: #000;
  font-size: 0.7rem;
  font-weight: 700;
  opacity: 0;
  transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

.logo-container:hover .logo {
  top: 35%;
  filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.1));
}

.logo-container:hover .slogan {
  top: 70%;
  opacity: 1;
}

.logo-container.active .logo {
  top: 35%;
  filter: drop-shadow(0 4px 6px rgba(0, 0, 0, 0.1));
}

.logo-container.active .slogan {
  top: 70%;
  opacity: 1;
}

/* 汉堡菜单 */
.hamburger {
  display: none;
  cursor: pointer;
  padding: 10px;
}

.bar {
  display: block;
  width: 25px;
  height: 3px;
  margin: 5px 0;
  transition: all 0.3s ease;
  background-color: #333;
}

/* 移动导航容器 */
.nav-container {
  width: 100%;
  height: auto;
  position: sticky;
  top: 0;
  z-index: 9999;
  background-color: #fff;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.nav-container .logo {
  position: relative;
  width: 100%;
  height: 80px;
  background-color: #fff;
  display: flex;
  align-items: center;
  padding: 0 1rem;
}

.nav-container .logo img {
  width: 40%;
  max-width: 150px;
  height: auto;
}

/* 底部移动导航 */
.mobile-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  width: 100%;
  background: #ececec;
  box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
  z-index: 1000;
}

.bottom-nav {
  display: flex;
  justify-content: space-around;
  padding: 10px 0;
  height: 70px;
}

.mobile-nav .nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
  color: #666;
  font-size: 12px;
  padding: 8px;
  transition: all 0.3s ease;
}

.mobile-nav .nav-item img {
  width: 24px;
  height: 24px;
  margin-bottom: 4px;
}

.mobile-nav .nav-item.active {
  color: #002fff;
}

.mobile-nav .nav-item:hover {
  transform: translateY(-5px);
  transform: scale(1.1);
}

/* 轮播图 */
.slider {
  position: relative;
  max-width: 100%;
  margin: 0 auto;
  overflow: hidden;
}

.slider-wrapper img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.slider-footer {
  position: absolute;
  bottom: 30px;
  width: 100%;
  text-align: center;
  z-index: 2;
}

.slider-indicator {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  justify-content: center;
  gap: 15px;
}

.slider-indicator li {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: #767676;
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.slider-indicator li.active {
  background-color: #000;
}

.slider-left,
.slider-right {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  background-color: rgba(0, 0, 0, 0.3);
  border-radius: 50%;
  cursor: pointer;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 24px;
  transition: background-color 0.3s ease;
}

.slider-left:hover,
.slider-right:hover {
  background-color: rgba(0, 0, 0, 0.7);
}

.slider-left {
  left: 20px;
}

.slider-right {
  right: 20px;
}

.slider-left::before {
  content: "‹";
  position: relative;
  left: -2px;
}

.slider-right::before {
  content: "›";
  position: relative;
  left: 2px;
}

/* 品牌小栏 */
.brand {
  padding: 3rem 0;
}

.brand-container {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

.video {
  flex: 1;
  max-width: 800px;
}

video {
  width: 100%;
  height: auto;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.introduce {
  flex: 1;
  max-width: 800px;
  line-height: 2;
  color: #000;
}

.introduce div {
  margin-bottom: 1.2em;
  text-align: justify;
  font-size: 1rem;
}

.introduce p {
  padding: 18px;
}

.introduce a {
  display: inline-block;
  margin-top: 20px;
  color: #0066cc;
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: all 0.3s ease;
  font-weight: 600;
}

.introduce a:hover {
  color: #004499;
  border-bottom-color: #004499;
}

.date-container {
  max-width: 1400px;
  margin: 2rem auto 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  opacity: 0;
}

@keyframes slideUp {
  0% {
    opacity: 0;
    transform: translateY(50px);
  }
  60% {
    opacity: 0.8;
    transform: translateY(-20px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}

.date-container.active {
  animation: slideUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
}

.day,
.patents,
.research,
.service {
  flex: 1;
  line-height: 2;
  text-align: center;
  max-width: 262.5px;
  padding: 1rem;
}

.date-container > div {
  font-size: 1rem;
}

.day > div,
.patents > div,
.research > div,
.service > div {
  font-size: 2.5rem;
  color: #2d2d2d;
  font-weight: bold;
}

/* 产品中心 */
.product-center {
  padding: 3rem 0;
  background-color: #f9f9f9;
}

.top {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  position: relative;
  margin-top: 2rem;
  max-width: 100%;
}

.top > a {
  font-size: 2.5rem;
  font-weight: bold;
  color: #000;
}

.top > div {
  width: 90px;
  height: 8px;
  background-color: #002fff;
  margin: 1.5rem auto;
  border-radius: 3px;
}

.top > p {
  font-size: 1.2rem;
  margin: 0;
  color: #666;
}

.product-lists {
  margin: 0 auto;
  padding: 0 1rem;
  max-width: 1200px;
  width: 100%;
  display: grid !important;
  grid-template-columns: repeat(3, 1fr) !important;
  gap: 1.5rem;
  box-sizing: border-box;
}

/* 由 JS 渲染的产品卡片（产品中心页 #productGrid 用 .product-item） */
.product-item {
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  text-align: center;
  background: #fff;
  width: auto !important;
  max-width: none !important;
  min-width: 0 !important;
}
.product-item > img {
  width: 100%;
  height: 240px;
  object-fit: contain;
  object-position: center center;
  display: block;
  margin: 0 auto;
  transition: transform 0.3s ease;
}
.product-item > p {
  font-size: 1.25rem;
  font-weight: bold;
  color: #000;
  padding: 0.9rem 0.5rem 1rem;
  margin: 0;
  text-align: center;
}
.product-item:hover > img {
  transform: scale(1.05);
}
.product-item:hover .img-overlay {
  transform: translateY(0);
}

/* 响应式：< 980 变 2 列，< 600 变 1 列 */
@media (max-width: 980px) {
  .product-lists { grid-template-columns: repeat(2, 1fr) !important; }
}
@media (max-width: 600px) {
  .product-lists { grid-template-columns: 1fr !important; }
}

/* 首页产品分页控件 */
.home-pager {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin: 1.5rem auto 2rem;
  padding: 0 1rem;
  max-width: 1200px;
}
.home-pager-info {
  color: #666;
  font-size: 0.9rem;
  margin-right: 0.6rem;
}
.home-pager-btn {
  min-width: 36px;
  height: 36px;
  padding: 0 0.8rem;
  border: 1px solid #d0d0d0;
  border-radius: 4px;
  background: #fff;
  color: #333;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
}
.home-pager-btn:hover:not(:disabled) {
  border-color: #002fff;
  color: #002fff;
}
.home-pager-btn.active {
  background: #002fff;
  border-color: #002fff;
  color: #fff;
}
.home-pager-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}
.home-pager-ellipsis {
  color: #999;
  padding: 0 0.3rem;
}

.first-product-list,
.second-product-list {
  margin: 2rem auto;
  display: flex;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.first-product-list > div,
.second-product-list > div {
  flex: 1;
  min-width: 280px;
  max-width: 350px;
  text-align: center;
  position: relative;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.first-product-list img,
.second-product-list img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.3s ease;
}

.first-product-list p,
.second-product-list p {
  font-size: 1.5rem;
  font-weight: bold;
  color: #000;
  padding: 1rem 0;
  margin: 0;
}

.img-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  color: white;
  text-align: center;
  opacity: 0.9;
  transform: translateY(-100%);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.first-product-list > div:hover .img-overlay,
.second-product-list > div:hover .img-overlay {
  transform: translateY(0);
}

.first-product-list > div:hover img,
.second-product-list > div:hover img {
  transform: scale(1.05);
}

.img-overlay a {
  color: #fff;
  text-decoration: none;
  font-size: 1.5rem;
  padding: 1.5rem 0;
  transition: color 0.3s ease;
}

.img-overlay a:hover {
  color: #002fff;
}

.divider {
  width: 50%;
  height: 3px;
  background: rgba(255, 255, 255, 0.5);
  margin: 5px 0;
}

.product-center-container {
  opacity: 0;
  transition: all 0.6s ease-out;
}

@keyframes productCenterslideUp {
  from {
    opacity: 0;
    transform: translateY(50px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.product-center-container.active {
  animation: productCenterslideUp 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94) forwards;
  visibility: visible;
}

/* 新闻中心 */
.news-center {
  padding: 3rem 0;
  background-color: #fff;
}

.news-center-container {
  max-width: 1200px;
  margin: 0 auto;
}

.news-lists {
  margin-top: 2rem;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.news-item {
  display: flex;
  gap: 1.5rem;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  transition: all 0.3s ease;
  background-color: #fff;
}

.news-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.news-image {
  flex: 0 0 200px;
  height: 150px;
  overflow: hidden;
  border-radius: 8px;
}

.news-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

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

.news-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.news-content h3 {
  margin: 0 0 1rem 0;
  font-size: 1.3rem;
  font-weight: 600;
}

.news-content h3 a {
  color: #000;
  text-decoration: none;
  transition: color 0.3s ease;
}

.news-content h3 a:hover {
  color: #002fff;
}

.news-content p {
  margin: 0 0 1rem 0;
  color: #666;
  line-height: 1.6;
  flex: 1;
}

.news-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.news-meta .date {
  color: #999;
  font-size: 0.9rem;
}

.news-meta .read-more {
  color: #002fff;
  font-size: 0.9rem;
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 4px;
  transition: all 0.3s ease;
  background-color: rgba(0, 47, 255, 0.1);
}

.news-meta .read-more:hover {
  background-color: rgba(0, 47, 255, 0.2);
  transform: translateY(-2px);
}

/* 链接框 */
.link-container {
  width: 100%;
  background-color: #333;
  padding: 2rem 0;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
  transition: all 0.3s ease;
}

.link {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  flex: 1;
  min-width: 300px;
  gap: 2rem;
}

.link-item {
  flex: 1;
  min-width: 180px;
  padding: 1rem;
  border-radius: 8px;
  background-color: rgba(255, 255, 255, 0.05);
  transition: all 0.3s ease;
}

.link-item:hover {
  background-color: rgba(255, 255, 255, 0.1);
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.link-item .top {
  margin-bottom: 1rem;
  padding-bottom: 0.8rem;
  border-bottom: 2px solid rgba(255, 255, 255, 0.2);
}

.link-item .top span {
  color: #fff;
  font-size: 1.2rem;
  font-weight: 700;
  display: inline-block;
  position: relative;
}

.link-item .top span::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 30px;
  height: 2px;
  background-color: #002fff;
  transition: all 0.3s ease;
}

.link-item:hover .top span::after {
  width: 60px;
}

.link-item div {
  margin-bottom: 0.8rem;
}

.link-item div a {
  color: #dfdfdf;
  font-size: 0.95rem;
  text-decoration: none;
  display: inline-block;
  position: relative;
  transition: all 0.3s ease;
  padding: 0.3rem 0;
}

.link-item div a::before {
  content: '';
  position: absolute;
  top: 0;
  left: -10px;
  width: 0;
  height: 100%;
  background-color: rgba(0, 47, 255, 0.2);
  transition: all 0.3s ease;
}

.link-item div a:hover {
  color: #fff;
  transform: translateX(8px);
  font-weight: 500;
}

.link-item div a:hover::before {
  width: 5px;
}

.other {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  min-width: 250px;
  padding: 1rem;
  border-radius: 8px;
  background-color: rgba(255, 255, 255, 0.05);
  transition: all 0.3s ease;
}

.other:hover {
  background-color: rgba(255, 255, 255, 0.1);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.other-item:first-child {
  margin-bottom: 1.5rem;
  text-align: center;
}

.other-item strong span {
  color: #fff;
  font-size: 1.3rem;
  font-weight: 700;
  display: block;
  margin-bottom: 1rem;
}

.other-phone {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  justify-content: center;
  padding: 0.8rem;
  border-radius: 50px;
  background-color: rgba(0, 47, 255, 0.2);
  transition: all 0.3s ease;
}

.other-phone:hover {
  background-color: rgba(0, 47, 255, 0.3);
  transform: scale(1.05);
}

.other-phone img {
  width: 24px;
  height: 24px;
  display: inline-block;
  vertical-align: middle;
  filter: brightness(0) invert(1);
}

.other-phone span {
  color: #fff;
  font-size: 1rem;
  font-weight: 500;
  white-space: nowrap;
}

.other-item:last-child {
  display: flex;
  justify-content: center;
}

.other-item:last-child img {
  width: 100px;
  height: 100px;
  border: 3px solid #fff;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.other-item:last-child img:hover {
  transform: scale(1.05);
  box-shadow: 0 5px 15px rgba(255, 255, 255, 0.3);
}

/* 备案信息 */
.information {
  width: 100%;
  min-height: 100px;
  background-color: #242424;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 1rem;
}

.information span,
.information a {
  color: #fff;
  font-size: 0.9rem;
}

/* 媒体查询 - 平板设备 */
@media (max-width: 992px) {
  html {
    font-size: 15px;
  }
  
  .nav-item > a {
    font-size: 0.9rem;
    padding: 0.5rem 0.8rem;
  }
  
  .top > a {
    font-size: 2.2rem;
  }
  
  .first-product-list > div,
  .second-product-list > div {
    min-width: 250px;
  }
  
  /* 新闻中心 - 平板设备优化 */
  .news-item {
    padding: 1.2rem;
  }
  
  .news-image {
    flex: 0 0 180px;
    height: 130px;
  }
  
  .news-content h3 {
    font-size: 1.2rem;
  }
  
  /* 链接框 - 平板设备优化 */
  .link-container {
    padding: 1.5rem 0;
    gap: 1.5rem;
  }
  
  .link {
    gap: 1.5rem;
  }
  
  .link-item, .other {
    min-width: 200px;
  }
}

/* 媒体查询 - 大型手机 */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  .topbar {
    display: none;
  }
  
  .main-content {
    display: none;
  }
  
  .nav-container,
  .mobile-nav {
    display: block;
  }
  
  .hamburger {
    display: block;
  }
  
  .brand-container {
    flex-direction: column;
  }
  
  .video,
  .introduce {
    max-width: 100%;
  }
  
  .date-container {
    flex-direction: column;
    gap: 1rem;
  }
  
  .day,
  .patents,
  .research,
  .service {
    max-width: 100%;
  }
  
  .first-product-list,
  .second-product-list {
    flex-direction: column;
    align-items: center;
  }
  
  .first-product-list > div,
  .second-product-list > div {
    min-width: 280px;
    max-width: 100%;
  }
  
  .img-overlay a {
    font-size: 1.2rem;
  }
  
  .first-product-list p,
  .second-product-list p {
    font-size: 1.3rem;
  }
  
  /* 新闻中心 - 大型手机优化 */
  .news-item {
    flex-direction: column;
    padding: 1rem;
  }
  
  .news-image {
    flex: 0 0 auto;
    height: 200px;
    width: 100%;
  }
  
  .news-content h3 {
    font-size: 1.3rem;
    margin-top: 1rem;
  }
  
  /* 链接框 - 大型手机优化 */
  .link-container {
    flex-direction: column;
    align-items: center;
    padding: 1.5rem 1rem;
    gap: 1rem;
  }
  
  .link {
    width: 100%;
    justify-content: space-around;
    gap: 1rem;
  }
  
  .link-item {
    min-width: 150px;
    padding: 0.8rem;
  }
  
  .other {
    width: 100%;
    min-width: auto;
    flex-direction: row;
    justify-content: space-around;
    margin-top: 0;
  }
  
  .other-item:first-child {
    margin-bottom: 0;
    flex: 1;
  }
  
  .other-phone {
    flex-direction: column;
    gap: 0.5rem;
  }
}

/* 媒体查询 - 小型手机 */
@media (max-width: 480px) {
  html {
    font-size: 13px;
  }
  
  .container {
    padding: 0 0.5rem;
  }
  
  .top > a {
    font-size: 1.8rem;
  }
  
  .slider-left,
  .slider-right {
    width: 30px;
    height: 30px;
    font-size: 18px;
  }
  
  .day > div,
  .patents > div,
  .research > div,
  .service > div {
    font-size: 2rem;
  }
  
  .other-phone {
    flex-direction: column;
    text-align: center;
  }
  
  .other-phone img {
    margin-bottom: 0.5rem;
  }
  
  /* 链接框 - 小型手机优化 */
  .link-container {
    padding: 1rem 0.5rem;
  }
  
  .link {
    flex-direction: column;
    align-items: center;
    gap: 0.8rem;
  }
  
  .link-item {
    min-width: 100%;
    text-align: center;
  }
  
  .other {
    flex-direction: column;
    gap: 1rem;
  }
  
  .link-item .top span::after {
    left: 50%;
    transform: translateX(-50%);
  }
  
  .link-item:hover .top span::after {
    width: 40px;
  }
  
  .link-item div a:hover {
    transform: translateX(0);
    color: #002fff;
  }
  
  .link-item div a::before {
    display: none;
  }
  
  /* 新闻中心 - 小型手机优化 */
  .news-center {
    padding: 2rem 0;
  }
  
  .news-image {
    height: 160px;
  }
  
  .news-content h3 {
    font-size: 1.2rem;
  }
  
  .news-meta {
    flex-direction: column;
    gap: 0.5rem;
    align-items: flex-start;
  }
  
  .news-meta .read-more {
    padding: 0.4rem 0.8rem;
    font-size: 0.85rem;
  }
}

/* 媒体查询 - 桌面设备 */
@media (min-width: 769px) {
  .nav-container,
  .mobile-nav {
    display: none;
  }
  
  .phone {
    display: flex;
  }
}

/* 产品中心页面特定样式 */

/* 页面标题 */
.page-title {
  padding: 3rem 0;
  background-color: #f9f9f9;
  text-align: center;
}

.page-title h1 {
  font-size: 2.5rem;
  color: #000;
  margin: 0 0 1rem 0;
}

.page-title p {
  font-size: 1.2rem;
  color: #666;
  margin: 0;
}

/* 产品分类 */
.product-categories {
  padding: 2rem 0;
  background-color: #fff;
  border-bottom: 1px solid #eee;
}

.categories-container {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.category-btn {
  padding: 0.8rem 1.5rem;
  border: 2px solid #e0e0e0;
  background-color: #fff;
  color: #333;
  font-size: 1rem;
  font-weight: 500;
  border-radius: 30px;
  cursor: pointer;
  transition: all 0.3s ease;
  outline: none;
}

.category-btn:hover {
  border-color: #002fff;
  color: #002fff;
}

.category-btn.active {
  background-color: #002fff;
  border-color: #002fff;
  color: #fff;
}

/* 产品特性 */
.product-features {
  padding: 4rem 0;
  background-color: #f9f9f9;
}

.features-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.feature-item {
  background-color: #fff;
  padding: 2rem;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  text-align: center;
  transition: transform 0.3s ease;
}

.feature-item:hover {
  transform: translateY(-5px);
}

.feature-item h3 {
  font-size: 1.5rem;
  color: #000;
  margin: 0 0 1rem 0;
}

.feature-item p {
  color: #666;
  line-height: 1.6;
  margin: 0;
}

/* 应用领域 */
.application-areas {
  padding: 4rem 0;
  background-color: #fff;
}

.application-areas .top {
  margin-bottom: 3rem;
}

.applications-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.application-item {
  padding: 2rem;
  border: 1px solid #e0e0e0;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.application-item:hover {
  border-color: #002fff;
  box-shadow: 0 4px 12px rgba(0, 47, 255, 0.1);
}

.application-item h3 {
  font-size: 1.3rem;
  color: #000;
  margin: 0 0 1rem 0;
}

.application-item p {
  color: #666;
  line-height: 1.6;
  margin: 0;
}

/* 响应式调整 */
@media (max-width: 768px) {
  .page-title {
    padding: 2rem 0;
  }
  
  .page-title h1 {
    font-size: 2rem;
  }
  
  .page-title p {
    font-size: 1rem;
  }
  
  .categories-container {
    gap: 0.5rem;
  }
  
  .category-btn {
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
  }
  
  .features-container,
  .applications-container {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}