/* common.css - 全站公共样式 */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;color:#1A1A1A;background:#E0F2F1;line-height:1.6}
a{color:#26A69A;text-decoration:none}
a:hover{color:#0D3B37}
img{max-width:100%;height:auto}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* 导航栏 */
.navbar{position:fixed;top:0;left:0;right:0;z-index:1000;background:transparent;transition:all .3s}
.navbar.scrolled{background:#0D3B37;box-shadow:0 2px 10px rgba(0,0,0,.2)}
.nav-container{max-width:1200px;margin:0 auto;padding:0 20px;display:flex;justify-content:space-between;align-items:center;height:70px}
.logo{display:flex;align-items:center;gap:8px;color:#fff;text-decoration:none}
.logo-main{font-size:28px;font-weight:700;color:#26A69A}
.logo-sub{font-size:14px;opacity:.9}
.nav-menu{display:flex;list-style:none;gap:30px}
.nav-menu a{color:#fff;text-decoration:none;font-size:15px;transition:color .3s;padding:5px 0}
.nav-menu a:hover,.nav-menu a.active{color:#26A69A}
.nav-toggle{display:none;background:none;border:none;color:#fff;font-size:24px;cursor:pointer}

/* Footer */
.footer{background:#0D3B37;color:#fff;padding:50px 0 0}
.footer-container{max-width:1200px;margin:0 auto;padding:0 20px;display:grid;grid-template-columns:repeat(4,1fr);gap:30px}
.footer-col h4{color:#26A69A;margin-bottom:15px;font-size:16px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:8px;font-size:14px;opacity:.9}
.footer-col a{color:#fff;text-decoration:none;opacity:.8}
.footer-col a:hover{opacity:1;color:#26A69A}
.footer-bottom{text-align:center;padding:20px;border-top:1px solid rgba(255,255,255,.1);margin-top:30px;font-size:14px;opacity:.7}
.footer-bottom a{color:#26A69A}

/* 面包屑 */
.breadcrumb{background:#fff;padding:12px 0;border-bottom:1px solid #B2DFDB;font-size:14px}
.breadcrumb a{color:#26A69A}

/* 返回顶部 */
.back-to-top{position:fixed;bottom:30px;right:30px;width:45px;height:45px;background:#26A69A;color:#fff;border:none;border-radius:50%;cursor:pointer;z-index:999;font-size:18px;transition:background .3s}
.back-to-top:hover{background:#0D3B37}

/* 按钮 */
.btn{display:inline-block;padding:12px 30px;background:#26A69A;color:#fff;text-decoration:none;border-radius:6px;transition:all .3s;border:none;cursor:pointer;font-size:15px}
.btn:hover{background:#0D3B37;transform:translateY(-2px)}

/* 响应式 */
@media(max-width:768px){
.nav-toggle{display:block}
.nav-menu{display:none;position:absolute;top:70px;left:0;right:0;background:#0D3B37;flex-direction:column;padding:20px;gap:15px}
.nav-menu.active{display:flex}
.footer-container{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:480px){
.footer-container{grid-template-columns:1fr}
}