* {
  margin:0; padding:0; box-sizing:border-box;
  font-family: "PingFang SC","Microsoft YaHei",sans-serif;
}
html { 
  font-size: calc(12px + (100vw - 375px) * 6 / 1545); 
  min-height: 100%;
}
body {
  background:#f5f7fa;
  color:#333;
  font-size: 1rem;
  min-height: 100vh;
}
body:not(.home-page) {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}
body:not(.home-page) .foot-wrap {
  margin-top: auto;
  flex-shrink: 0;
}

a {text-decoration: none;}
/* =========================
   鼠标跟随圆点样式
========================= */
.cursor-dot {
    position: fixed;
    width: 16px;
    height: 16px;
    background: rgba(0, 102, 204, 0.7);
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    transform: translate(-50%, -50%);
    transition: width 0.2s ease, height 0.2s ease;
}

.cursor-dot.hovering {
    width: 32px;
    height: 32px;
}

/* =========================
   滚动缓出动画基础样式
========================= */
.fade-in-element {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.8s ease-out;
  will-change: opacity, transform;
}
.fade-in-element.visible {
  opacity: 1;
  transform: translateY(0);
}
.fade-delay-1 { transition-delay: 0.1s; }
.fade-delay-2 { transition-delay: 0.2s; }
.fade-delay-3 { transition-delay: 0.3s; }
.fade-delay-4 { transition-delay: 0.4s; }

/* =========================
   滚动触发动画样式
========================= */
.scroll-animate {
    opacity: 0;
    transform: translateY(2rem);
    transition: all 0.8s ease-out;
}
.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

.scroll-animate-left {
    opacity: 0;
    transform: translateX(-2rem);
    transition: all 0.8s ease-out;
}
.scroll-animate-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.scroll-animate-right {
    opacity: 0;
    transform: translateX(2rem);
    transition: all 0.8s ease-out;
}
.scroll-animate-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.scroll-animate-scale {
    opacity: 0;
    transform: scale(0.9);
    transition: all 0.8s ease-out;
}
.scroll-animate-scale.visible {
    opacity: 1;
    transform: scale(1);
}

/* =========================
   导航栏样式
========================= */
.nav {
  position: fixed;
  top:0; left:0;
  width:100%;
  height:4.375rem;
  background:#fff;
  box-shadow:0 0.125rem 0.625rem rgba(0,0,0,0.05);
  display: flex;
  align-items:center;
  justify-content: center;
  padding:0 2%;
  z-index:999;
  transition: all 0.3s ease;
}

/* 首页特殊效果 */
.home-page .nav {
  background:transparent;
  box-shadow:none;
}

.home-page .nav.scrolled,
.home-page .nav:hover {
  background:#fff;
  box-shadow:0 0.125rem 0.625rem rgba(0,0,0,0.05);
}

.home-page .logo,
.home-page .menu-item a {
  color:#fff;
}

.home-page .nav.scrolled .logo {
  color:#005AAA;
}
.home-page .nav.scrolled .menu-item a {
  color:#333;
}

.home-page .nav.scrolled .logo .box-span {
  background:#005AAA;
}
.nav-inner {
  max-width: 100rem;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-left {
  flex-shrink: 0;
}
.logo {
  position: relative;
  left:0;
  font-size:1.375rem;
  font-weight:600;
  color:#005AAA;
}
.logo a {
  color: inherit;
  text-decoration: none;
}
.logo img {
  height: 3.4375rem;
  width: auto;
  display: block;
}

.home-page .logo img {
  filter: brightness(0) invert(1);
  transition: filter 0.3s ease;
}

.home-page .nav.scrolled .logo img,
.home-page .nav:hover .logo img {
  filter: none;
}
.menu {
  display: flex;
  align-items: center;
  justify-content: center;
}
.menu-item {
  position: relative;
  padding:0 1.375rem;
  height:4.375rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.menu-item a {
  text-decoration:none;
  color:#333;
  font-size:0.9375rem;
  transition:all 0.2s;
  white-space: nowrap;
}
.menu-item:hover > a { color:#005AAA; }

/* 首页导航链接样式 */
.home-page .menu-item a {
  color:#fff;
}
.home-page .menu-item:hover > a {
  color:#fff;
  opacity: 0.8;
}
.home-page .nav.scrolled .menu-item:hover > a,
.home-page .nav:hover .menu-item:hover > a {
  color:#005AAA;
  opacity: 1;
}
.nav-arrow {
  width: 0.5rem;
  height: 0.3125rem;
  margin-left: 0.25rem;
  margin-bottom: 0.125rem;
  transition: all 0.2s ease;
  display: inline-block;
}
.menu-item.has-submenu:hover .nav-arrow path {
  stroke: #005AAA;
}
.submenu {
  position: fixed;
  top:4.375rem;
  left:0;
  width:100%;
  background:#fff;
  box-shadow:0 0.25rem 0.9375rem rgba(0,0,0,0.08);
  padding:1.625rem 0;
  opacity:0;
  visibility: hidden;
  transition:all 0.25s ease;
  z-index:99;
}
.submenu-inner {
  max-width:68.75rem;
  margin:0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap:2.8125rem;
}
.submenu a {
  font-size:0.875rem;
  color:#444 !important;
  position: relative;
  padding:0.5rem 0;
}
.submenu a:hover {
  color:#005AAA !important;
}
.submenu a::after {
  content:"";
  width:0;
  height:0.125rem;
  background:#005AAA;
  position: absolute;
  bottom:0;
  left:50%;
  transform:translateX(-50%);
  transition:all 0.2s;
}
.submenu a:hover::after {
  width:100%;
}
.menu-item:hover .submenu {
  opacity:1;
  visibility: visible;
}

/* =========================
   Banner 视频背景 - 核心修改（标题向下调整为450px）
========================= */
.banner {
  width:100%;
  height: 100vh;
  min-height: 37.5rem;
  max-height: 62.5rem;
  position: relative;
  top: 0;
  display: flex;
  align-items:center;
  justify-content: center; 
  padding:0 5%;
  overflow: hidden;
  align-items: flex-start;
  padding-top: 21.875rem;
}
.banner-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 1;
}
.banner-text {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  z-index: 2;
  color: #fff;
  font-family: "SimHei", "Heiti SC", sans-serif;
  text-align: center;
  opacity: 0;
  animation: bannerTextFadeIn 1.5s ease-out 0.5s forwards;
}
.banner-text-line1 {
  font-size: 3.5rem;
  font-weight: 600;
  margin: 0 0 0.5rem 0;
  letter-spacing: 0.5rem;
  text-shadow: 0 0.125rem 0.375rem rgba(0, 0, 0, 0.5);
}
.banner-text-line2 {
  font-size: 3.5rem;
  font-weight: 600;
  margin: 0;
  letter-spacing: 0.5rem;
  text-shadow: 0 0.125rem 0.375rem rgba(0, 0, 0, 0.5);
}
@keyframes bannerTextFadeIn {
  0% {
    opacity: 0;
    transform: translate(-50%, -50%) translateY(1.25rem);
  }
  100% {
    opacity: 1;
    transform: translate(-50%, -50%) translateY(0);
  }
}
.banner .text {
  max-width:55rem;
  position: relative;
  z-index: 2;
  text-align: center; 
  opacity: 0;
  transform: translateY(5rem);
  animation: textFadeIn 1.2s ease-out 0.5s forwards;
}
@keyframes textFadeIn {
  0% {
    opacity: 0;
    transform: translateY(5rem);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
  }
}
.banner .en-title {
  font-size: clamp(1.5rem, 4vw, 3.5rem); 
  color:#fff;
  font-weight: bold; 
  margin-bottom: 0.9375rem;
  text-shadow: 0 0.25rem 1.25rem rgba(0,0,0,0.6);
  line-height: 1.2;
  white-space: pre-line;
}
.banner .cn-title {
  font-size: clamp(1.125rem, 2.5vw, 2rem);
  color:#fff;
  font-weight: 600;
  text-shadow: 0 0.25rem 1.25rem rgba(0,0,0,0.6);
  line-height: 1.4;
}
.banner .scroll-down {
  position: absolute;
  bottom: 3.75rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  cursor: pointer;
}
.banner .scroll-down .icon {
  width: 2.5rem;
  height: 2.5rem;
  border: 0.0625rem solid #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  animation: bounce 2s infinite;
}
.banner .scroll-down .icon::after {
  content: '';
  width: 0.625rem;
  height: 0.625rem;
  border-right: 0.0625rem solid #fff;
  border-bottom: 0.0625rem solid #fff;
  transform: rotate(45deg) translate(-0.125rem, -0.125rem);
  animation: arrowMove 1.5s infinite;
}
@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(0.625rem); }
}
@keyframes arrowMove {
  0%, 100% { opacity: 1; transform: rotate(45deg) translate(-0.125rem, -0.125rem); }
  50% { opacity: 0.5; transform: rotate(45deg) translate(0, 0); }
}
.banner .scroll-down .text {
  display: none; 
  font-size: 0.875rem;
  color: #fff;
  margin-top: 0.9375rem;
  text-shadow: 0 0.125rem 0.625rem rgba(0,0,0,0.3);
  animation: none;
  opacity: 1;
  transform: none;
}

/* =========================
   模块通用样式
========================= */
.section {
  max-width: 100rem;
  margin:0 auto;
  padding: 0 1.25rem; 
  margin-top: 1.25rem; 
  width: 100%;
}
#news {
  margin-bottom: 1.25rem;
  max-width: 100rem;
  padding: 0 1.25rem;
}
.section h2 {
  text-align:left;
  font-size:2rem;
  font-weight:700;
  color:#333;
  margin-bottom:2.5rem;
}
.white-box {
  background:#fff;
  border-radius:0;
  box-shadow:none;
  padding: 5rem 2.5rem;
  width: 100%;
}
.product-container, 
.area-container, 
.news-container {
  padding: 0 1.875rem;
  width: 100%;
  box-sizing: border-box;
}
.title-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom:3.125rem;
}
.title-row h2 {
  margin-bottom:0 !important;
}
.more {
  font-size:0.9375rem;
  color:#999;
  text-decoration:none;
  transition: color 0.3s ease;
}
.more:hover {
  color:#005AAA;
}

/* =========================
   产品中心样式
========================= */
.product-box {
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap: 0.9375rem;
}
.product {
  display:flex;
  flex-direction:column;
  min-height: 32.5rem;
  height:100%;
  padding: 1.875rem 1.5625rem; 
  border: 0.0625rem solid #eee;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  transition-delay: 0.1s;
  justify-content: space-between;
  transform: translateY(0);
}
.product:hover {
  box-shadow: 0 0.9375rem 2.5rem rgba(0, 90, 170, 0.12);
  border-color: #005AAA;
  transform: translateY(-0.5rem);
}
.product .img {
  width:100%;
  height: 18.75rem;
  background:#eee;
  margin: 0.9375rem 0;
  border-radius:0;
  background-size: cover !important;
  background-repeat: no-repeat !important;
  background-position: center center !important;
  transition: transform 0.4s ease;
}
.product:hover .img {
  transform: scale(1.05);
}
.product h3 {
  font-size:1.125rem;
  color:#333;
  margin-bottom:0.75rem;
  font-weight: 600;
  transition: color 0.3s ease;
}
.product:hover h3 {
  color:#005AAA;
}
.product p {
  font-size:0.875rem;
  color:#777;
  line-height:1.7;
  margin-bottom: 1.25rem;
  flex-grow: 0;
}
.btn {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width: 7.5rem;
  height: 2.5rem;
  background:#fff;
  color:#005AAA !important;
  font-size:0.875rem;
  font-weight: 500;
  border-radius: 62.4375rem;
  border: 0.0625rem solid #005AAA;
  text-decoration:none;
  transition: all 0.3s ease;
  margin-bottom: 0.625rem;
  align-self: flex-start;
}
.product:hover .btn,
.btn:hover {
  background:#005AAA;
  color:#fff !important;
  border-color: #005AAA;
}

/* =========================
   应用领域样式 - 核心修改：蓝色底+左右拉满
========================= */
#area {
  max-width: 100% !important;
  padding: 0 !important;
  margin-top: 1.25rem !important;
}
#area .white-box {
  background: #005AAA !important;
  padding: 5rem 0 !important;
}
.area-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 3.75rem;
  max-width: 100rem;
  margin-left: auto;
  margin-right: auto;
  padding: 0 1.875rem;
}
.area-title-box {
  max-width: 28.125rem;
}
.area-title-box h2 {
  font-size: 2.25rem;
  font-weight: 700;
  color: #fff !important;
  margin-bottom: 0.9375rem;
}
.area-title-box p {
  font-size:0.875rem;
  color: #e0e0e0 !important;
  line-height:1.6;
}
.area-tabs {
  display: flex;
  gap: 2.1875rem;
  border-bottom: 0.0625rem solid rgba(255,255,255,0.2);
  padding-bottom: 0.5rem;
}
.area-tab {
  font-size: 1rem;
  color: #e0e0e0 !important;
  padding-bottom: 0.5rem;
  cursor: pointer;
  position: relative;
  transition: color 0.3s ease;
}
.area-tab.active {
  color: #fff !important;
}
.area-tab.active::after {
  content: "";
  position: absolute;
  bottom: -0.5625rem;
  left: 0;
  width: 100%;
  height: 0.125rem;
  background: #fff;
}
.area-tab:hover {
  color: #fff !important;
}
.area-content-wrapper {
  width: 100%;
  max-width: 100rem;
  margin-left: auto;
  margin-right: auto;
  padding: 0 1.875rem;
}
.area-content-item.active {
  display: flex;
  align-items: center;
  gap: 3.75rem;
}
.area-text {
  flex: 0.8;
}
.area-img {
  flex: 1.2;
  height: 30rem;
  border-radius: 0.5rem;
  overflow: hidden;
  transition: all 0.5s ease;
}
.area-img:hover {
  transform: scale(1.05);
  box-shadow: 0 0.9375rem 2.5rem rgba(0, 0, 0, 0.15);
}
.area-text h3 {
  font-size: 2rem;
  color: #fff !important;
  margin-bottom: 1.5625rem;
  font-weight: 600;
}
.area-text p {
  font-size: 0.9375rem;
  color: #e0e0e0 !important;
  line-height: 1.8;
  margin-bottom: 1.875rem;
}
.area-more {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width: 7.5rem; 
  height: 2.5rem; 
  background:#fff;
  color:#005AAA !important;
  font-size:0.875rem;
  font-weight: 500;
  border-radius: 62.4375rem;
  border: 0.0625rem solid #fff;
  text-decoration:none;
  transition: all 0.3s ease;
  gap: 0;
  margin-bottom: 0.625rem;
}
.area-more:hover {
  background:transparent !important;
  color:#fff !important;
  border-color: #fff !important;
}
.area-more i {
  display: none;
}
.area-content-item {
  display: none;
}

/* =========================
   新闻资讯样式
========================= */
.news-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 3.75rem;
}
.news-main-title {
  font-size: 2.25rem;
  font-weight: 700;
  color: #333;
  margin-bottom: 0.5rem; 
}
.news-subtitle {
  font-size:0.875rem;
  color:#999;
  line-height:1.6;
}
.news-more-btn {
  font-size:0.9375rem;
  color:#999;
  text-decoration:none;
  padding:0;
  border:none;
  border-radius:0;
  background:none;
  transition: color 0.3s ease;
}
.news-more-btn:hover {
  color:#005AAA !important;
  border:none;
}
.news-more-btn i {
  display:none;
}
.news-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  grid-template-rows: auto auto;
  gap: 1.875rem;
  margin-bottom: 1.875rem;
}
.news-row-1 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.875rem;
  grid-column: 1 / 3;
}
.news-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 1.875rem;
  grid-column: 1 / 3;
}
.news-card {
  background: #fff;
  border-radius: 0.5rem;
  padding: 2.5rem 1.875rem;
  position: relative;
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  cursor: pointer;
  min-height: 31.25rem;
  border: 0.0625rem solid #eee;
  transition-delay: 0.15s;
  display: flex;
  flex-direction: column;
  height: 100%;
  justify-content: flex-start;
  transform: translateY(0);
}
.news-card:hover {
  box-shadow: 0 0.9375rem 2.5rem rgba(0, 90, 170, 0.1);
  transform: translateY(-0.375rem);
  border-color: #005AAA;
}
.news-date {
  font-size: 0.875rem;
  color: #005AAA;
  margin-bottom: 1rem;
  display: block;
}
.news-card-title {
  font-size: 1.25rem;
  font-weight: 400;
  color: #333;
  line-height: 1.6;
  margin-bottom: 1.25rem;
  transition: color 0.3s ease;
  min-height: 5rem;
}
.news-card:hover .news-card-title {
  color: #005AAA;
}
.news-img {
  width: 100%;
  height: 15.625rem; 
  border-radius: 0.25rem;
  overflow: hidden;
  margin-top: auto;
  margin-bottom: 5rem;
  background: #f5f5f5;
  object-fit: cover;
  flex-shrink: 0;
  transition: transform 0.4s ease;
}
.news-card:hover .news-img {
  transform: scale(1.05);
}
.news-action-btn {
  width: 2.25rem;
  height: 2.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  position: absolute;
  bottom: 2.5rem;
  left: 1.875rem;
  background: transparent;
  cursor: pointer;
  margin-top: auto;
}
.news-action-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  border: 0.0625rem solid #888;
  box-sizing: border-box;
  z-index: 1;
  transition: border-color 0.3s ease;
}
.news-action-btn::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  box-sizing: border-box;
  z-index: 2;
  border: 0.0625rem solid transparent;
  border-right-color: #888;
  transform: rotate(0deg);
  transition: all 0.6s ease-in-out;
}
.news-card:hover .news-action-btn::after {
  transform: rotate(-360deg);
  border-color: #005AAA;
}
.news-card:hover .news-action-btn::before {
  border-color: #005AAA;
}
.news-action-btn .arrow {
  width: 0.5rem;
  height: 0.5rem;
  border-right: 0.0625rem solid #888;
  border-bottom: 0.0625rem solid #888;
  transform: rotate(-45deg) translate(-0.03125rem, 0);
  position: relative;
  z-index: 3;
  transition: border-color 0.3s ease;
}
.news-card:hover .news-action-btn .arrow {
  border-right-color: #005AAA;
  border-bottom-color: #005AAA;
}

/* =========================
   底部导航样式（核心修改：确保图标显示）
========================= */
/* 我们的故事 - 统计卡片交互效果 */
.stat-item {
  transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  transform: translateY(0);
}


.foot-wrap {
  background:#005AAA;
  width: 100%;
  margin-bottom: 0;
  padding:3.25rem 5% 0 5%;
  opacity: 1 !important;
  transform: none !important;
}
.foot-inner {
  max-width: 100rem;
  margin:0 auto;
  display:flex;
  justify-content:space-between;
  flex-wrap:wrap;
  gap:2.5rem;
  width: 100%;
}
.foot-left {
  min-width:17.5rem;
  position: relative;
}
.foot-left .logo {
  position:relative;
  left:0;
  font-size:1.625rem;
  margin-bottom:1.25rem;
  color:#fff;
}
.foot-left p {
  color:#e0e0e0;
  font-size:0.875rem;
  margin-bottom:1.5625rem;
  line-height:1.7;
}
/* 核心修改：社交图标样式（强化显示） */
.foot-social {
  display:flex;
  gap:0.9375rem;
}

.qr-trigger-wrapper {
  position: relative;
}
.foot-social a {
  text-decoration: none;
  display: block;
}
.foot-social-icon {
  width:2rem;
  height:2rem;
  background:transparent;
  display:flex;
  align-items:center;
  justify-content:center;
  cursor: pointer;
}
.foot-social-icon img {
  width:100%;
  height:100%;
  object-fit: contain;
}
.foot-right {
  display:flex;
  gap:3.75rem;
  flex-wrap:wrap;
}
.foot-col h4 {
  font-size:1rem;
  color:#fff;
  margin-bottom:1.25rem;
  font-weight:600;
}
.foot-col ul {
  list-style:none;
}
.foot-col li {
  margin-bottom:0.75rem;
}
.foot-col a {
  color:#e0e0e0;
  text-decoration:none;
  font-size:0.875rem;
  transition:0.2s;
}
.foot-col a:hover {
  color:#fff;
}
.foot-beian {
  color:#fff;
  text-align:center;
  padding:1rem 0 0.75rem;
  font-size:0.875rem;
  border-top: 0.0625rem solid rgba(255,255,255,0.1);
  margin-top: 0.75rem;
  opacity: 1 !important;
  transform: none !important;
}
#product .white-box {
  padding: 7.5rem 2.5rem;
}
#news .white-box {
  padding: 6.25rem 3.75rem;
}

/* =========================
   核心修改：清空图标内文字，改为空白占位
========================= */
.icon-weixin::before {
  content: "";
  font-size: 1rem;
  font-weight: 600;
}
.icon-weibo::before {
  content: "";
  font-size: 1rem;
}

/* =========================
   回到顶部按钮样式
========================= */
.back-to-top {
    transition: all 0.3s ease;
}
.back-to-top:hover {
    opacity: 0.8;
}

/* 响应式媒体查询 */
@media (max-width: 64rem) {
    .product-box {
        grid-template-columns: repeat(2, 1fr) !important;
    }
    .area-content-item.active {
        flex-direction: column;
        gap: 1.875rem !important;
    }
    .area-text, .area-img {
        flex: 1 !important;
        width: 100%;
    }
    .area-img {
        height: 18.75rem !important;
    }
}

/* =========================
   移动端菜单样式
========================= */
.menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 1.5rem;
    height: 1.125rem;
    cursor: pointer;
    z-index: 10001;
}

.menu-toggle span {
    display: block;
    width: 100%;
    height: 0.125rem;
    background-color: #333;
    transition: all 0.3s ease;
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(0.3125rem, 0.3125rem);
}

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

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(0.4375rem, -0.375rem);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 4.375rem;
    left: 0;
    width: 100%;
    height: calc(100vh - 4.375rem);
    background-color: #fff;
    z-index: 10000;
    overflow-y: auto;
    box-shadow: 0 0.25rem 0.625rem rgba(0, 0, 0, 0.1);
}

.mobile-menu.active {
    display: block;
}

.mobile-menu-inner {
    padding: 1.25rem;
}

.mobile-menu-inner > a,
.mobile-menu-title {
    display: block;
    padding: 0.9375rem 0;
    font-size: 1rem;
    color: #333;
    text-decoration: none;
    border-bottom: 0.0625rem solid #eee;
}

.mobile-menu-item {
    position: relative;
}

.mobile-menu-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}

.mobile-menu-title a {
    flex: 1 1 auto;
    color: inherit;
}

.mobile-menu-title .mobile-arrow {
    flex: 0 0 auto;
    margin-left: 0.75rem;
}

.mobile-arrow {
    width: 0.75rem;
    height: 0.5rem;
    transition: transform 0.3s ease;
}

.mobile-menu-item.active .mobile-arrow {
    transform: rotate(180deg);
}

.mobile-submenu {
    display: none;
    padding: 0.625rem 0 0.625rem 1.25rem;
    background-color: #f9f9f9;
}

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

.mobile-submenu a {
    display: block;
    padding: 0.75rem 0;
    font-size: 0.875rem;
    color: #666;
    text-decoration: none;
    border-bottom: 0.0625rem solid #eee;
}

.mobile-submenu a:last-child {
    border-bottom: none;
}

@media (max-width: 48rem) {
    .cursor-dot {
        display: none !important;
    }

    .nav {
        height: 3.75rem !important;
        padding: 0 3% !important;
        justify-content: space-between !important;
    }
    .nav-left {
        display: flex;
        align-items: center;
    }
    .logo {
        font-size: 1.125rem !important;
    }
    .menu {
        display: none !important;
    }
    .menu-toggle {
        display: flex !important;
        margin-left: auto;
    }
    .mobile-menu {
        top: 3.75rem !important;
        height: calc(100vh - 3.75rem) !important;
    }
    .banner {
        height: 100vh !important;
        min-height: 31.25rem !important;
        max-height: 43.75rem !important;
        padding-top: 15.625rem !important;
    }
    .banner-text-line1,
    .banner-text-line2 {
        font-size: 2.2rem !important;
        letter-spacing: 0.2rem !important;
    }
    .product-box {
        grid-template-columns: 1fr !important;
    }
    .product {
        min-height: auto !important;
        padding: 2.5rem 1.25rem !important;
    }
    .product .img {
        height: 12.5rem !important;
    }
    .news-grid {
        grid-template-columns: 1fr !important;
    }
    .news-row-1, .news-row-2 {
        grid-template-columns: 1fr !important;
        grid-column: 1 !important;
    }
    .news-card {
        min-height: auto !important;
    }
    .news-img {
        height: 11.25rem !important;
        margin-bottom: 3.75rem !important;
    }
    .area-top {
        flex-direction: column;
        gap: 1.25rem;
    }
    .area-tabs {
        flex-wrap: wrap;
        gap: 0.9375rem !important;
    }
    .area-tab {
        font-size: 0.8125rem !important;
        padding: 0.5rem 1rem !important;
    }
    .area-content-item.active {
        flex-direction: column !important;
    }
    .area-text, .area-img {
        width: 100% !important;
        flex: none !important;
    }
    .area-img {
        height: 18.75rem !important;
    }
    .area-text h3 {
        font-size: 1.5rem !important;
    }
    .story-container {
        flex-direction: column !important;
        gap: 2.5rem !important;
        padding: 0 1.25rem !important;
    }
    .story-text, .story-stats {
        min-width: auto !important;
        width: 100% !important;
    }
    .story-stats {
        grid-template-columns: repeat(2, 1fr) !important;
        gap: 0.9375rem !important;
    }
    .stat-item {
        padding: 1.25rem 0.9375rem !important;
    }
    .stat-item span {
        font-size: 2rem !important;
    }
    .foot-inner {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .foot-right {
        justify-content: center;
    }
}

@media (max-width: 30rem) {
    .banner {
        height: 28.125rem !important;
        padding-top: 9.375rem !important;
    }
    .banner-text-line1,
    .banner-text-line2 {
        font-size: 1.5rem !important;
        letter-spacing: 0.1rem !important;
    }
    .section {
        padding: 3.75rem 0 !important;
    }
    .section h2 {
        font-size: 1.5rem !important;
    }
    .white-box {
        padding: 2.5rem 0.9375rem !important;
    }
    .title-row {
        align-items: flex-start !important;
        gap: 0.9375rem;
    }
    .product {
        padding: 1.5625rem 0.9375rem !important;
    }
    .product h3 {
        font-size: 1rem !important;
    }
    .product p {
        font-size: 0.8125rem !important;
    }
    .news-grid {
        gap: 1.25rem !important;
    }
    .news-card {
        padding: 1.5625rem 0.9375rem !important;
    }
    .news-card-title {
        font-size: 1rem !important;
    }
    .news-header {

        gap: 0.9375rem;
    }
    .news-main-title {
        font-size: 1.5rem !important;
    }
    .story-stats {
        grid-template-columns: 1fr 1fr !important;
        gap: 0.75rem !important;
    }
    .stat-item {
        padding: 0.9375rem 0.625rem !important;
    }
    .stat-item span {
        font-size: 1.75rem !important;
    }
    .stat-item p {
        font-size: 0.75rem !important;
    }
    .area-text h3 {
        font-size: 1.375rem !important;
    }
    .area-text p {
        font-size: 0.875rem !important;
    }
    .foot-wrap {
        padding: 2.25rem 5% 0 !important;
    }
    .foot-left .logo {
        font-size: 1.25rem !important;
    }
    .float-btn-group {
        bottom: 1.25rem !important;
        right: 0.9375rem !important;
    }
}

/* 图片懒加载占位样式 */
img.lazy {
    filter: blur(0.125rem);
    transition: filter 0.3s ease;
}

img.lazy.loaded {
    filter: blur(0);
}

/* 悬浮按钮组样式 */
.float-btn-group {
    position: fixed;
    bottom: 1.875rem;
    right: 1.875rem;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    border-radius: 0.625rem;
    overflow: hidden;
    box-shadow: 0 0.25rem 1.25rem rgba(0, 0, 0, 0.15);
}

.float-btn {
    width: 3.5rem;
    height: 3.5rem;
    background: #888888;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    outline: none;
}

.float-btn:hover {
    background: #666666;
}

.float-btn:active {
    transform: scale(0.95);
}

.float-btn-top {
    border-radius: 0.625rem 0.625rem 0 0;
}

.float-btn-middle {
    border-top: 0.0625rem solid rgba(255, 255, 255, 0.2);
    border-bottom: 0.0625rem solid rgba(255, 255, 255, 0.2);
}

.float-btn-bottom {
    border-radius: 0 0 0.625rem 0.625rem;
}

.float-btn svg {
    transition: transform 0.3s ease;
}

.float-btn:hover svg {
    transform: scale(1.1);
}

/* 性能优化 */
.area-img, .news-img {
    will-change: transform;
    backface-visibility: hidden;
}

/* 自定义滚动条样式 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: #005AAA;
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: #004080;
}

/* Firefox 滚动条 */
* {
    scrollbar-width: thin;
    scrollbar-color: #005AAA #f1f1f1;
}

/* =========================
   产品中心下拉菜单样式
========================= */
.nav .menu .menu-item.product-menu .submenu.product-submenu {
    position: fixed;
    top: 4.375rem;
    left: 0;
    width: 100%;
    background: #fff;
    box-shadow: 0 0.125rem 0.5rem rgba(0, 0, 0, 0.08);
    padding: 0;
    opacity: 0;
    visibility: hidden;
    display: none;
    transition: all 0.25s ease;
    z-index: 99;
    border-top: 0.0625rem solid #f0f0f0;
    max-height: calc(100vh - 4.375rem);
    overflow: hidden;
}

.nav .menu .menu-item.product-menu:hover .submenu.product-submenu {
    opacity: 1;
    visibility: visible;
    display: block;
}

.nav .menu .menu-item.product-menu .product-submenu-inner {
    max-width: calc(100% - 20rem);
    margin: 0 0 0 20rem;
    display: flex;
    justify-content: flex-start;
    padding: 2.5rem 0;
    gap: 4rem;
    min-height: 25rem;
    transition: min-height 0.3s ease;
}

.nav .menu .menu-item.product-menu .product-submenu-inner.tall {
    min-height: 28rem;
}

.nav .menu .menu-item.product-menu .product-submenu-col.product-col-left {
    width: 18rem;
    min-width: 16rem;
    max-width: 20rem;
    background: #f8f9fa;
    padding: 0;
    margin: -2.5rem 0;
    margin-left: 4rem;
    padding-left: 3rem;
    border-radius: 0;
    box-sizing: border-box;
    flex-shrink: 0;
    align-self: stretch;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    padding-top: 2.5rem;
}

.nav .menu .menu-item.product-menu .product-col-left a {
    font-size: 0.875rem;
    color: #666;
    text-decoration: none;
    padding: 0.75rem 3rem 0.75rem 3rem;
    margin-bottom: 0.125rem;
    border-radius: 0;
    transition: all 0.15s ease;
    position: relative;
    display: block;
    background: transparent url('../images/arrow-icon.svg') right center no-repeat;
    background-size: 0 0;
}

.nav .menu .menu-item.product-menu .product-col-left a:hover {
    color: #005AAA;
    background: #f0f7ff url('../images/arrow-icon.svg') calc(100% - 0.75rem) center no-repeat;
    background-size: 0.9375rem 0.25rem;
}

.nav .menu .menu-item.product-menu .product-recommend {
    min-width: 14rem;
    max-width: 15rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 1rem;
    border-left: 0.0625rem solid #e8e8e8;
    flex-shrink: 0;
    align-self: flex-start;
}

.nav .menu .menu-item.product-menu .recommend-title {
    font-size: 1rem;
    font-weight: 600;
    color: #005AAA;
    margin-bottom: 0.5rem;
}

.nav .menu .menu-item.product-menu .recommend-model {
    font-size: 0.875rem;
    font-weight: 500;
    color: #333;
    margin-bottom: 1rem;
}

.nav .menu .menu-item.product-menu .recommend-image {
    width: 100%;
    max-width: 14rem;
    margin-bottom: 1rem;
}

.nav .menu .menu-item.product-menu .recommend-image img {
    width: 100%;
    height: auto;
    display: block;
}

.nav .menu .menu-item.product-menu .recommend-more {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    color: #005AAA;
    cursor: pointer;
    transition: all 0.2s ease;
}

.nav .menu .menu-item.product-menu .recommend-more:hover {
    color: #007bff;
}

.nav .menu .menu-item.product-menu .recommend-more img {
    width: 1rem;
    height: auto;
    transition: transform 0.2s ease;
}

.nav .menu .menu-item.product-menu .recommend-more:hover img {
    transform: translateX(0.25rem);
}

.nav .menu .menu-item.product-menu .product-col-left a.active {
    color: #005AAA;
    background: #fff url('../images/arrow-icon.svg') calc(100% - 0.75rem) center no-repeat;
    background-size: 0.9375rem 0.25rem;
    font-weight: 500;
}

.nav .menu .menu-item.product-menu .product-col-left a::after {
    display: none !important;
}

.nav .menu .menu-item.product-menu .content-col a::after {
    display: none !important;
}

.nav .menu .menu-item.product-menu .product-content-area {
    flex: 0 1 40%;
    min-height: 15rem;
    min-width: 15rem;
    max-width: 30rem;
}

.nav .menu .menu-item.product-menu .content-panel {
    display: none;
    flex-direction: row;
    gap: 3rem;
    padding-right: 1rem;
    padding-bottom: 1.5rem;
    flex-wrap: nowrap;
}

.nav .menu .menu-item.product-menu .content-panel.active {
    display: flex;
}

.nav .menu .menu-item.product-menu .content-col {
    min-width: 14rem;
    max-width: 16rem;
    display: flex;
    flex-direction: column;
}

.nav .menu .menu-item.product-menu .content-panel-bonder {
    min-height: 22rem;
}

.nav .menu .menu-item.product-menu .content-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: #262626;
    text-decoration: none;
    padding: 0.5rem 0.5rem 0.375rem;
    margin-bottom: 1rem;
    margin-top: 0.625rem;
    border-bottom: 0.0625rem solid #e8e8e8;
    display: block;
    transition: all 0.15s ease;
}

.nav .menu .menu-item.product-menu .content-title:hover {
    color: #005AAA;
}

.nav .menu .menu-item.product-menu .content-col a {
    font-size: 0.875rem;
    color: #808080;
    text-decoration: none;
    padding: 0.5rem 0.5rem;
    line-height: 1.8;
    transition: color 0.15s ease;
}

.nav .menu .menu-item.product-menu .content-col a:hover {
    color: #005AAA;
}

.foot-social-icon.qr-trigger {
    position: relative;
    cursor: pointer;
    transition: transform 0.2s ease;
}

.foot-social-icon.qr-trigger:hover {
    transform: scale(1.1);
}

.qr-popup {
    display: none;
    position: absolute;
    bottom: calc(100% + 1.5rem);
    left: 50%;
    transform: translateX(-50%);
    background: #fff;
    padding: 0.5rem;
    border-radius: 0.375rem;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
    z-index: 1000;
    text-align: center;
    animation: fadeInUp 0.2s ease;
}

.qr-popup::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 0.375rem solid transparent;
    border-top-color: #fff;
}

.qr-trigger-wrapper:hover .qr-popup {
    display: block;
}

.qr-content img {
    width: 7rem;
    height: 7rem;
    display: block;
    margin-bottom: 0.375rem;
}

.qr-content p {
    font-size: 0.625rem;
    color: #666;
    margin: 0;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(0.5rem);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}