*{
  margin:0;
  padding:0;
  box-sizing:border-box;
  font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
}
html,body{
  color:#222;
  background:#ffffff;
  line-height:1.6;
  overflow-x:hidden; /* 禁止横向滚动 */
  width:100%;
}
.container{
  max-width:1100px;
  margin:0 auto;
  padding:0 20px;
  width:100%;
}
a{
  text-decoration:none;
  color:inherit;
}
ul{list-style:none;}
img{max-width:100%;display:block;}
.btn-blue{
  background:#4285f4;
  color:#fff;
  border:none;
  padding:10px 22px;
  border-radius:6px;
  cursor:pointer;
  font-weight:500;
}
.btn-blue:disabled{
  opacity:0.6;
  cursor:not-allowed;
}
.btn-white{
  background:#fff;
  color:#222;
  border:1px solid #ccc;
  padding:10px 22px;
  border-radius:6px;
  cursor:pointer;
  font-weight:500;
}
/* 区块通用样式 */
.section{
    padding: 30px 0;
    width:100%;
}
.section-title{
  text-align:center;
  margin-bottom:40px;
}
.section-title h2{
  font-size:32px;
  margin-bottom:10px;
}
.section-title p{
  color:#666;
}
/* Header */
.top-bar{
  background:#000;
  color:#fff;
  padding:8px 0;
  font-size:14px;
  width:100%;
}
.top-bar .container{
  display:flex;
  justify-content:space-between;
  align-items:center;
}
.nav-bar{
  padding:16px 0;
  background:#fff;
  z-index:99;
  box-shadow:0 2px 8px rgba(0,0,0,0.08);
  width:100%;
  transition: all 0.3s ease;
}
.nav-bar.nav-fixed{
  position:fixed;
  top:0;
  left:0;
  right:0;
  box-shadow:0 4px 12px rgba(0,0,0,0.12);
}
.nav-bar .container{
  display:flex;
  justify-content:space-between;
  align-items:center;
}
.logo{
  font-size:22px;
  font-weight:bold;
  color:#222;
}
.main-nav ul{
  display:flex;
  gap:26px;
}
.main-nav a{
  font-size:15px;
}
.mobile-menu-btn{
  display:none;
  font-size:28px;
  background:none;
  border:none;
}
/* Hero Banner */
.hero{
  background:linear-gradient(rgba(0,0,0,0.45),rgba(0,0,0,0.45)),url('');
  color:#fff;
  padding:110px 0;
  width:100%;
}
.hero h1{
  font-size:42px;
  line-height:1.2;
  margin-bottom:14px;
}
.hero p{
  margin-bottom:24px;
  opacity:0.95;
}
/* Tracking */
.track-wrap{
  background:#fff;
  margin-top:-50px;
  position:relative;
  z-index:2;
  box-shadow:0 4px 20px #00000015;
  border-radius:10px;
  padding:24px;
  width:100%;
}
.track-head{
  display:flex;
  align-items:center;
  gap:10px;
  margin-bottom:12px;
}
.track-form{
  display:flex;
  gap:10px;
}
.track-input-wrap{
  flex:1;
  position:relative;
}
.track-input-wrap .input-icon{
  position:absolute;
  left:14px;
  top:50%;
  transform:translateY(-50%);
}
.track-input-wrap input{
  width:100%;
  padding:12px 14px 12px 44px;
  border:1px solid #ddd;
  border-radius:6px;
}
/* Services */
#services{
  background:#f7f9fc;
}
.services-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:20px;
}
.service-card{
  background:#fff;
  border:1px solid #eef2f7;
  border-radius:12px;
  padding:28px 24px;
  transition:all 0.3s ease;
  position:relative;
  overflow:hidden;
}
.service-card::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  width:4px;
  height:100%;
  background:#4285f4;
  transform:scaleY(0);
  transform-origin:top;
  transition:transform 0.3s ease;
}
.service-card:hover{
  transform:translateY(-6px);
  box-shadow:0 12px 28px rgba(66,133,244,0.12);
  border-color:#d7e4ff;
}
.service-card:hover::before{
  transform:scaleY(1);
}
.service-card .service-icon{
  width:56px;
  height:56px;
  border-radius:12px;
  background:#eef4ff;
  display:flex;
  align-items:center;
  justify-content:center;
  color:#4285f4;
  font-size:26px;
  margin-bottom:16px;
  transition:all 0.3s;
}
.service-card:hover .service-icon{
  background:#4285f4;
  color:#fff;
}
.service-card h3{
  font-size:18px;
  margin-bottom:10px;
  color:#222;
  transition:color 0.3s;
}
.service-card:hover h3{
  color:#4285f4;
}
.service-card p{
  font-size:14px;
  color:#666;
  margin-bottom:14px;
  line-height:1.5;
}
.service-card .readmore{
  font-size:14px;
  color:#4285f4;
  font-weight:600;
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.service-card .readmore::after{
  content:"→";
  transition:transform 0.3s;
}
.service-card:hover .readmore::after{
  transform:translateX(4px);
}
/* About */
.about-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  align-items:center;
}
.about-img-box{
  position:relative;
}
.about-exp-tag{
  position:absolute;
  bottom:-10px;
  left:-10px;
  background:#fff;
  box-shadow:0 2px 10px #00000012;
  padding:14px 20px;
  border-left:4px solid #4285f4;
}
.about-exp-tag h4{font-size:24px;}
.about-list{
  margin:16px 0;
}
.about-list li{
  margin:8px 0;
  padding-left:20px;
  position:relative;
}
.about-list li::before{
  content:"◎";
  color:#4285f4;
  position:absolute;
  left:0;
}
.about-buttons{
  display:flex;
  gap:14px;
  margin-top:20px;
}
/* Feature section */
.feature-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  align-items:center;
}
.feature-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
  margin:24px 0;
}
.feature-item{
  border:1px solid #eee;
  border-radius:8px;
  padding:16px;
}
/* Counter Stats */
.stats{
    position: relative;
    overflow: hidden;
    background: url(../img/slider-3.jpg) no-repeat center;
    background-size: cover;
    /* background-attachment: fixed; 移动端禁用fixed背景，会造成横向滚动 */
    z-index: 1;
  color:#fff;
  padding:60px 0;
  width:100%;
}
.stats::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(27, 25, 25, 0.7);
    z-index: -1;
}
.stats-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.stat-card{
  background:#509cff;
  text-align:center;
  padding:30px 10px;
  border-radius:8px;
  
}
.stat-card img{display: block; margin: auto; width: 90px;}
.stat-card h3{
  font-size:34px;
  margin-bottom:6px;
}
/* Blog */
.blog-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.blog-card{
  background:#fff;
  border-radius:14px;
  overflow:hidden;
  box-shadow:0 4px 18px rgba(0,0,0,0.06);
  transition:all 0.3s;
}
.blog-card:hover{
  transform:translateY(-8px);
  box-shadow:0 16px 34px rgba(66,133,244,0.14);
}
.blog-img{
  position:relative;
  height:200px;
  overflow:hidden;
}
.blog-img img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform 0.5s;
}
.blog-card:hover .blog-img img{
  transform:scale(1.08);
}
.blog-date{
  position:absolute;
  bottom:12px;
  right:12px;
  background:#4285f4;
  color:#fff;
  padding:6px 10px;
  font-size:13px;
  border-radius:6px;
  font-weight:600;
}
.blog-content{
  padding:22px;
}
.blog-content h3{
  font-size:17px;
  margin-bottom:10px;
  color:#222;
  transition:color 0.3s;
}
.blog-card:hover .blog-content h3{
  color:#4285f4;
}
.blog-content .readmore{
  font-size:14px;
  color:#4285f4;
  font-weight:600;
}
.quote-section{
 position: relative;
     overflow: hidden;
     background: url(../img/transport-bg.jpg) no-repeat center;
     background-size: cover;
     /* background-attachment: fixed; 移动端禁用fixed背景 */
     z-index: 1;
  color:#fff;
  padding:80px 0;
  width:100%;
}
.quote-section::after {
    position: absolute;
    content: '';
    width: 100%;
    height: 100%;
    left: 0;
    top: 0;
    background-color: rgba(80, 156, 255, 0.9);
    z-index: -1;
}
.quote-row{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:40px;
  align-items:center;
}
.quote-form{
  background:#fff;
  color:#222;
  padding:26px;
  border-radius:10px;
  box-shadow:0 4px 18px #00000018;
}
.form-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:14px;
  margin-bottom:14px;
}
.quote-form input,.quote-form select{
  width:100%;
  padding:11px;
  border:1px solid #ddd;
  border-radius:6px;
}
.quote-form button{
  width:100%;
  margin-top:10px;
}
/* Newsletter */
.newsletter{
  padding:50px 0;
  background:#0f172a;
  width:100%;
}
.newsletter-card{
  background:#fff;
  border-radius:14px;
  padding:30px 34px;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:24px;
  box-shadow:0 10px 30px rgba(0,0,0,0.08);
}
.newsletter-text h3{
  font-size:20px;
  color:#111;
}
.newsletter-form{
  display:flex;
  gap:10px;
  min-width:340px;
}
.newsletter-form input{
  flex:1;
  padding:12px 16px;
  border:1px solid #e5e7eb;
  border-radius:10px;
  outline:none;
  font-size:14px;
  background:#f7f9fc;
}
.newsletter-form input:focus{
  border-color:#4285f4;
  background:#fff;
}
.newsletter-form button{
  border:none;
  padding:12px 22px;
  border-radius:10px;
  background:#4285f4;
  color:#fff;
  font-weight:600;
  cursor:pointer;
}
/* Footer */
footer{
  background:#111;
  color:#fff;
  padding:60px 0 30px;
  width:100%;
}
.footer-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:30px;
}
.footer-col h4{
  margin-bottom:16px;
  font-size:18px;
}
.footer-col li{
  margin:8px 0;
  color:#bbb;
}
/* Mobile Responsive */
@media(max-width:768px){
  .main-nav{
    display:none;
    position:absolute;
    top:100%;
    left:0;
    width:100%;
    background:#fff;
    padding:20px;
    box-shadow:0 4px 10px rgba(0,0,0,0.1);
  }
  .main-nav ul{
    flex-direction:column;
    gap:16px;
  }
  .mobile-menu-btn{display:block;}
  .hero h1{font-size:32px;}
  .track-form{flex-direction:column;}
  .services-grid{grid-template-columns:1fr 1fr;}
  .about-row,.feature-row,.quote-row{grid-template-columns:1fr;}
  .stats-grid{grid-template-columns:repeat(2,1fr);}
  .blog-grid{grid-template-columns:1fr;}
  .form-grid{grid-template-columns:1fr;}
  .nl-wrap{flex-direction:column;align-items:flex-start;}
  .footer-grid{grid-template-columns:repeat(2,1fr);}
  .newsletter-card{
    flex-direction:column;
    align-items:flex-start;
  }
  .newsletter-form{
    min-width:100%;
    width:100%;
  }
}
@media(max-width:480px){
  .services-grid{grid-template-columns:1fr;}
  .stats-grid{grid-template-columns:1fr;}
  .footer-grid{grid-template-columns:1fr;}
}
/* Slider */
.slider-section{
  position:relative;
  width:100%;
  overflow:hidden; /* 给轮播容器增加溢出隐藏，彻底解决横向滚动 */
}
.slider{
  position:relative;
  height:480px;
  overflow:hidden;
  width:100%;
}
.slide{
  position:absolute;
  inset:0;
  opacity:0;
  transition:opacity 0.6s ease-in-out;
  display:flex;
  align-items:center;
  width:100%;
}
.slide.active{
  opacity:1;
  z-index:1;
}
.slide-content{
  color:#fff;
  max-width:700px;
  padding:0 20px;
  margin-left:8%;
  width:calc(100% - 40px);
}
.slide-content h1{
  font-size:42px;
  line-height:1.2;
  margin-bottom:14px;
}
.slide-content p{
  font-size:16px;
  margin-bottom:24px;
  opacity:0.95;
}
.slider-arrow{
  position:absolute;
  top:50%;
  transform:translateY(-50%);
  z-index:3;
  width:44px;
  height:44px;
  border-radius:50%;
  background:rgba(255,255,255,0.9);
  color:#222;
  border:none;
  font-size:24px;
  cursor:pointer;
}
.slider-prev{left:20px;}
.slider-next{right:20px;}
.slider-arrow:hover{
  background:#4285f4;
  color:#fff;
}
.slider-dots{
  position:absolute;
  bottom:20px;
  left:0;
  right:0;
  z-index:3;
  display:flex;
  justify-content:center;
  gap:10px;
}
.dot{
  width:12px;
  height:12px;
  border-radius:50%;
  background:rgba(255,255,255,0.5);
  cursor:pointer;
}
.dot.active{
  background:#4285f4;
}
/* Language Dropdown */
.language-dropdown{
  position:relative;
}
.language-btn{
  background:#111;
  color:#fff;
  border:1px solid #333;
  padding:8px 14px;
  border-radius:4px;
  cursor:pointer;
  font-size:14px;
  display:flex;
  align-items:center;
  gap:8px;
}
.language-btn:hover{
  background:#222;
}
.language-btn .arrow{
  font-size:12px;
  transition:transform 0.2s;
}
.language-dropdown.open .language-btn .arrow{
  transform:rotate(180deg);
}
.language-menu{
  position:absolute;
  top:calc(100% + 8px);
  right:0;
  background:#fff;
  color:#222;
  min-width:180px;
  border-radius:6px;
  box-shadow:0 8px 24px rgba(0,0,0,0.15);
  list-style:none;
  padding:8px 0;
  margin:0;
  z-index:100;
  opacity:0;
  visibility:hidden;
  transform:translateY(-8px);
  transition:all 0.25s ease;
}
.language-dropdown.open .language-menu{
  opacity:1;
  visibility:visible;
  transform:translateY(0);
}
.language-menu li{
  display:flex;
  align-items:center;
  gap:10px;
  padding:10px 14px;
  font-size:14px;
  cursor:pointer;
}
.language-menu li:hover{
  background:#f5f5f5;
  color:#4285f4;
}
.language-menu li.active{
  background:#eef4ff;
  color:#4285f4;
  font-weight:600;
}
.flag-icon{
  font-size:16px;
}
/* Tracking Result Box */
.track-result-box{
  margin-top:16px;
  background:#f7f9fc;
  border:1px dashed #c9dbff;
  border-radius:12px;
  padding:30px 20px;
  text-align:center;
  display:none;
}
.track-result-box.show{
  display:block;
  animation:fadeIn 0.3s ease;
}
.track-result-inner{
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:10px;
}
.result-icon{
  width:44px;
  height:44px;
  border-radius:50%;
  background:#eef4ff;
  display:flex;
  align-items:center;
  justify-content:center;
}
.result-text{
  color:#666;
  font-size:14px;
}
@keyframes fadeIn{
  from{opacity:0;transform:translateY(6px);}
  to{opacity:1;transform:translateY(0);}
}