html {
    scrollbar-gutter: stable;
    overflow-y: auto;
}
:root{
    --primary:#00A5A8;
    --secondary:#FF9623;
    --dark:#222;
    --gray:#666;
    --light:#f8fafc;
    --white:#ffffff;
}
*{
    margin:0;
    padding:0;
    box-sizing:border-box;
    font-family:system-ui,-apple-system,Segoe UI,Roboto,"Helvetica Neue",sans-serif;
}
body{
    color:var(--dark);
    background:var(--white);
    line-height:1.7;
}
.container{
    max-width:1200px;
    margin:0 auto;
    padding:0 20px;
}
/* 头部导航 VI */
header{
    border-bottom:1px solid #eee;
    position:sticky;
    top:0;
    background:#fff;
    z-index:99;
}
.nav-wrap{
    display:flex;
    justify-content:space-between;
    align-items:center;
    height:72px;
}
.logo{
    font-size:24px;
    font-weight:700;
    color:var(--primary);
    text-decoration:none;
}
.nav-links{
    display:flex;
    gap:32px;
}
.nav-links a{
    text-decoration:none;
    color:var(--dark);
    font-size:16px;
    transition:color 0.24s ease;
}
.nav-links a:hover{
    color:var(--primary);
}
/* 按钮组件 VI */
.btn{
    padding:10px 22px;
    border-radius:6px;
    text-decoration:none;
    font-weight:500;
    border:none;
    cursor:pointer;
    font-size:16px;
    transition:all 0.24s ease;
}
.btn-primary{
    background:var(--primary);
    color:#fff;
}
.btn-primary:hover{
    opacity:0.92;
    box-shadow:0 2px 8px rgba(0,165,168,0.2);
}
.btn-outline{
    border:1px solid var(--primary);
    color:var(--primary);
    background:transparent;
}
.btn-outline:hover{
    background:rgba(0,165,168,0.06);
}
/* 首屏Banner VI */
.banner{
    padding:110px 0;
    text-align:center;
    background:var(--light);
}
.banner h1{
    font-size:44px;
    color:var(--primary);
    margin-bottom:18px;
    font-weight:700;
}
.banner p{
    font-size:19px;
    color:var(--gray);
    max-width:720px;
    margin:0 auto 36px;
}
.banner-buttons{
    display:flex;
    gap:18px;
    justify-content:center;
}
/* 通用区块 */
.section{
    padding:84px 0;
}
.section-title{
    text-align:center;
    font-size:32px;
    margin-bottom:52px;
    color:var(--dark);
    font-weight:600;
}
/* 卡片组件 VI */
.card-grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(264px,1fr));
    gap:26px;
}
.card{
    background:#fff;
    border:1px solid #eee;
    border-radius:14px;
    padding:30px;
    transition:0.3s ease;
}
.card:hover{
    box-shadow:0 10px 28px rgba(0,165,168,0.13);
    transform:translateY(-4px);
}
.card h3{
    color:var(--primary);
    margin-bottom:14px;
    font-size:20px;
}
.card small{
    color:#888;
    display:block;
    margin-top:14px;
}
/* 表单样式 VI */
.form-box{
    max-width:620px;
    margin:0 auto;
}
.form-item{
    margin-bottom:22px;
}
.form-item label{
    display:block;
    margin-bottom:8px;
    font-weight:500;
}
.form-item input,.form-item select,.form-item textarea{
    width:100%;
    padding:13px;
    border:1px solid #ddd;
    border-radius:8px;
    font-size:16px;
    transition:border 0.2s;
}
.form-item input:focus,.form-item select:focus,.form-item textarea:focus{
    outline:none;
    border-color:var(--primary);
}
/* 页面标题头 */
.page-header{
    padding:64px 0;
    background:var(--light);
    text-align:center;
}
.page-header h1{
    font-size:36px;
    color:var(--dark);
    margin-bottom:14px;
}
.page-header p{
    color:var(--gray);
    font-size:18px;
}
/* 页脚 VI + 备案号样式【重点新增】 */
footer{
    background:#1A2429;
    color:#B8C2C7;
    padding:48px 0 28px;
    text-align:center;
    font-size:14px;
}
footer a{
    color:#fff;
    text-decoration:none;
}
footer a:hover{
    color:var(--secondary);
}
.footer-record{
    margin-top:14px;
    font-size:13px;
}
.footer-record a{
    color:#B8C2C7;
}
.footer-record a:hover{
    color:#fff;
}
/* 汉堡菜单按钮 - 桌面端隐藏，移动端显示 */
.menu-toggle{
    display:none;
    flex-direction:column;
    justify-content:center;
    gap:5px;
    width:40px;
    height:40px;
    background:transparent;
    border:none;
    cursor:pointer;
    padding:0;
}
.menu-toggle span{
    display:block;
    width:24px;
    height:2px;
    background:var(--dark);
    border-radius:2px;
    transition:all 0.3s ease;
    margin:0 auto;
}
.menu-toggle.active span:nth-child(1){
    transform:translateY(7px) rotate(45deg);
}
.menu-toggle.active span:nth-child(2){
    opacity:0;
}
.menu-toggle.active span:nth-child(3){
    transform:translateY(-7px) rotate(-45deg);
}
/* 移动端下拉导航菜单 */
.mobile-nav{
    display:none;
    flex-direction:column;
    background:#fff;
    border-top:1px solid #eee;
    padding:10px 20px 18px;
    box-shadow:0 4px 12px rgba(0,0,0,0.05);
}
.mobile-nav.active{
    display:flex;
}
.mobile-nav a{
    text-decoration:none;
    color:var(--dark);
    font-size:16px;
    padding:14px 8px;
    border-bottom:1px solid #f0f0f0;
    transition:color 0.24s ease;
}
.mobile-nav a:last-of-type{
    border-bottom:none;
}
.mobile-nav a:hover{
    color:var(--primary);
}
.mobile-nav .btn{
    margin-top:10px;
    text-align:center;
}
/* 移动端适配 */
@media(max-width:768px){
    .nav-links{display:none;}
    .nav-cta{display:none;}
    .menu-toggle{display:flex;}
    .banner h1{font-size:32px;}
    .banner{padding:70px 0;}
    .section{padding:56px 0;}
}