* {
margin: 0;
padding: 0;
box-sizing: border-box;
font-family: "Microsoft YaHei", sans-serif;
}
body {
color: #333;
line-height: 1.6;
}
.container {
width: 92%;
max-width: 1200px;
margin: 0 auto;
}
a {
text-decoration: none;
color: inherit;
}
ul {
list-style: none;
}

/* 头部 */
.header {
background: #fff;
box-shadow: 0 2px 10px rgba(0,0,0,0.05);
position: fixed;
width: 100%;
top: 0;
z-index: 999;
padding: 15px 0;
}
.header .container {
display: flex;
justify-content: space-between;
align-items: center;
}
.logo h2 {
color: #0058ff;
font-weight: 600;
}
.nav ul {
display: flex;
gap: 35px;
}
.nav li a {
font-size: 16px;
color: #333;
transition: 0.3s;
}
.nav li.active a,
.nav li a:hover {
color: #0058ff;
font-weight: 500;
}

/* banner */
.banner {
margin-top: 80px;
background: linear-gradient(135deg, #0048ff, #0084ff);
color: #fff;
padding: 120px 0;
}
.banner-text h1 {
font-size: 42px;
line-height: 1.3;
margin-bottom: 15px;
}
.banner-text h1 span {
font-weight: 400;
opacity: 0.95;
}
.banner-text p {
font-size: 18px;
margin-bottom: 30px;
opacity: 0.9;
}
.banner-btns {
display: flex;
gap: 15px;
}
.btn {
padding: 12px 30px;
border-radius: 50px;
font-size: 16px;
transition: 0.3s;
display: inline-block;
}
.btn.blue {
background: #fff;
color: #0058ff;
font-weight: 500;
}
.btn.white {
background: transparent;
color: #fff;
border: 1px solid #fff;
}
.btn:hover {
transform: translateY(-2px);
}
.btn.full {
width: 100%;
text-align: center;
}

/* 优势 */
.advantages {
padding: 60px 0;
background: #f7f9fc;
}
.advantages .container {
display: flex;
gap: 30px;
text-align: center;
}
.advantage-item {
flex: 1;
background: #fff;
padding: 35px 20px;
border-radius: 12px;
box-shadow: 0 3px 15px rgba(0,0,0,0.04);
}
.advantage-item h3 {
font-size: 20px;
margin-bottom: 10px;
color: #222;
}
.advantage-item p {
color: #666;
}

/* 标题 */
.section-title {
text-align: center;
margin-bottom: 50px;
}
.section-title h2 {
font-size: 32px;
color: #222;
margin-bottom: 10px;
}
.section-title p {
color: #666;
max-width: 600px;
margin: 0 auto;
}
.section-title.white h2,
.section-title.white p {
color: #fff;
}

/* 服务 */
.services {
padding: 90px 0;
}
.service-list {
display: grid;
grid-template-columns: repeat(3,1fr);
gap: 25px;
}
.service-box {
background: #f8f9fa;
padding: 35px 25px;
border-radius: 12px;
transition: 0.3s;
}
.service-box:hover {
background: #0058ff;
color: #fff;
transform: translateY(-3px);
}
.service-box h4 {
font-size: 19px;
margin-bottom: 10px;
}

/* 产品 */
.products {
background: #004cff;
padding: 90px 0;
color: #fff;
}
.product-items {
display: flex;
gap: 30px;
}
.product-item {
flex: 1;
background: rgba(255,255,255,0.1);
padding: 35px 25px;
border-radius: 12px;
backdrop-filter: blur(5px);
}
.product-item h5 {
font-size: 19px;
margin-bottom: 10px;
}

/* 联系 */
.contact {
padding: 90px 0;
}
.contact-form {
max-width: 600px;
margin: 0 auto;
}
.contact-form input,
.contact-form textarea {
width: 100%;
padding: 14px 18px;
margin-bottom: 18px;
border: 1px solid #eee;
border-radius: 8px;
font-size: 16px;
outline: none;
transition: 0.3s;
}
.contact-form input:focus,
.contact-form textarea:focus {
border-color: #0058ff;
}
.contact-form textarea {
min-height: 120px;
resize: vertical;
}

/* 底部 */
.footer {
background: #111;
color: #fff;
padding: 50px 0 20px;
}
.footer-content {
display: flex;
justify-content: space-between;
margin-bottom: 30px;
}
.footer-left h3 {
font-size: 22px;
margin-bottom: 10px;
color: #007bff;
}
.copyright {
text-align: center;
padding-top: 20px;
border-top: 1px solid #333;
color: #888;
font-size: 14px;
}

/* 响应式 */
@media(max-width:992px){
.service-list{grid-template-columns: repeat(2,1fr);}
}
@media(max-width:768px){
.nav{display:none;}
.banner-text h1{font-size:32px;}
.advantages .container,
.product-items,
.footer-content{flex-direction:column;}
.service-list{grid-template-columns:1fr;}
}