/* 志汇网络 - PbootCMS模板样式 */
*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}
html{font-size:14px;-webkit-text-size-adjust:100%}
body{font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;color:#333;line-height:1.6;background:#fff;overflow-x:hidden}
a{color:#1a73e8;text-decoration:none;transition:color .3s}
a:hover{color:#0d47a1}
img{max-width:100%;height:auto;border:0;vertical-align:middle}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.3}
.container{width:96%;max-width:1200px;margin:0 auto;padding:0 10px}
.clearfix:after{content:"";display:table;clear:both}
.text-center{text-align:center}
.hidden{display:none}

/* 顶部条 */
.topbar{background:#1a73e8;color:#fff;font-size:12px;padding:6px 0}
.topbar a{color:#fff}
.topbar .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap}
.topbar .welcome{opacity:.9}
.topbar .links a{margin-left:15px;opacity:.9}
.topbar .links a:hover{opacity:1}

/* 头部 */
.header{background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.08);position:sticky;top:0;z-index:1000}
.header .container{display:flex;align-items:center;justify-content:space-between;height:70px}
.logo{display:flex;align-items:center;font-size:22px;font-weight:700;color:#1a73e8}
.logo img{height:40px;margin-right:10px}
.logo .slogan{font-size:12px;color:#999;font-weight:normal;margin-left:8px}
.nav{display:flex;align-items:center}
.nav ul{display:flex}
.nav ul li{position:relative;margin:0 5px}
.nav ul li a{display:block;padding:10px 18px;color:#333;font-size:15px;font-weight:500;border-radius:4px;transition:all .3s}
.nav ul li a:hover,.nav ul li.active a{color:#1a73e8;background:#f0f6ff}
.nav ul li.has-sub>a:after{content:"\25BC";font-size:8px;margin-left:6px;opacity:.6}
.nav ul li .submenu{position:absolute;top:100%;left:0;background:#fff;min-width:160px;box-shadow:0 4px 12px rgba(0,0,0,.12);border-radius:4px;padding:6px 0;opacity:0;visibility:hidden;transform:translateY(10px);transition:all .3s;z-index:100}
.nav ul li:hover .submenu{opacity:1;visibility:visible;transform:translateY(0)}
.nav ul li .submenu a{padding:8px 16px;font-size:14px;border-radius:0}
.nav-toggle{display:none;flex-direction:column;cursor:pointer;padding:8px}
.nav-toggle span{width:24px;height:2px;background:#333;margin:3px 0;transition:.3s}
.nav-toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* Banner */
.banner{background:linear-gradient(135deg,#1a73e8 0%,#0d47a1 100%);color:#fff;padding:80px 0;position:relative;overflow:hidden}
.banner:before{content:"";position:absolute;top:-50%;right:-10%;width:600px;height:600px;background:rgba(255,255,255,.05);border-radius:50%}
.banner:after{content:"";position:absolute;bottom:-30%;left:-5%;width:400px;height:400px;background:rgba(255,255,255,.05);border-radius:50%}
.banner .container{position:relative;z-index:1;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap}
.banner-left{flex:1;min-width:300px;max-width:600px;margin-right:30px}
.banner-right{flex:0 0 400px;text-align:center}
.banner h1{font-size:40px;margin-bottom:15px;font-weight:700}
.banner h1 .highlight{color:#ffd54f}
.banner .subtitle{font-size:20px;opacity:.95;margin-bottom:20px}
.banner .desc{font-size:15px;line-height:1.8;opacity:.9;margin-bottom:30px}
.banner .btns{display:flex;gap:15px;flex-wrap:wrap}
.banner .btn{display:inline-block;padding:12px 30px;border-radius:30px;font-size:15px;font-weight:500;transition:all .3s}
.banner .btn-primary{background:#f9a825;color:#fff}
.banner .btn-primary:hover{background:#f57f17;transform:translateY(-2px);box-shadow:0 6px 20px rgba(249,168,37,.5)}
.banner .btn-outline{border:2px solid #fff;color:#fff}
.banner .btn-outline:hover{background:#fff;color:#1a73e8}
.banner-right img{max-width:100%;border-radius:10px;box-shadow:0 20px 60px rgba(0,0,0,.3)}

/* Banner 科技感动态效果 */
.banner-right{display:flex;align-items:center;justify-content:center}
.tech-scene{position:relative;width:380px;height:380px;margin:0 auto}
.tech-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);background-size:30px 30px;mask-image:radial-gradient(circle at center,#000 30%,transparent 70%);-webkit-mask-image:radial-gradient(circle at center,#000 30%,transparent 70%);animation:gridMove 20s linear infinite}
.tech-core{position:absolute;top:50%;left:50%;width:0;height:0}
.tech-ring{position:absolute;top:50%;left:50%;border:1.5px solid rgba(255,255,255,.25);border-radius:50%;transform:translate(-50%,-50%)}
.tech-ring-1{width:120px;height:120px;border-top-color:#4fc3f7;border-right-color:#4fc3f7;animation:ringSpin 8s linear infinite}
.tech-ring-2{width:200px;height:200px;border-bottom-color:#ffd54f;border-left-color:#ffd54f;animation:ringSpin 12s linear infinite reverse}
.tech-ring-3{width:280px;height:280px;border-top-color:#fff;border-left-color:rgba(255,255,255,.4);animation:ringSpin 16s linear infinite}
.tech-center{position:absolute;top:50%;left:50%;width:80px;height:80px;transform:translate(-50%,-50%);display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,#ffd54f,#ffb300);border-radius:50%;box-shadow:0 0 40px rgba(255,213,79,.6),inset 0 0 20px rgba(255,255,255,.3);z-index:3}
.tech-logo{width:48px;height:48px;object-fit:contain;display:block}
.tech-pulse{position:absolute;inset:0;border-radius:50%;border:2px solid #ffd54f;animation:pulse 2.5s ease-out infinite}
.tech-orbit{position:absolute;top:50%;left:50%;border:1px dashed rgba(255,255,255,.15);border-radius:50%;transform:translate(-50%,-50%)}
.tech-orbit-1{width:160px;height:160px;animation:orbitSpin 10s linear infinite}
.tech-orbit-2{width:240px;height:240px;animation:orbitSpin 14s linear infinite reverse}
.tech-orbit-3{width:320px;height:320px;animation:orbitSpin 18s linear infinite}
.tech-dot{position:absolute;top:-14px;left:50%;width:28px;height:28px;margin-left:-14px;display:flex;align-items:center;justify-content:center;background:rgba(255,255,255,.95);border-radius:50%;font-size:14px;box-shadow:0 0 15px rgba(79,195,247,.7)}
.tech-orbit-1 .tech-dot{background:linear-gradient(135deg,#4fc3f7,#1a73e8);box-shadow:0 0 15px rgba(79,195,247,.8)}
.tech-orbit-2 .tech-dot{background:linear-gradient(135deg,#81c784,#43a047);box-shadow:0 0 15px rgba(129,199,132,.8)}
.tech-orbit-3 .tech-dot{background:linear-gradient(135deg,#ffd54f,#ff9800);box-shadow:0 0 15px rgba(255,213,79,.8)}
.tech-particles{position:absolute;inset:0;pointer-events:none}
.tech-particles span{position:absolute;width:4px;height:4px;background:#4fc3f7;border-radius:50%;box-shadow:0 0 8px #4fc3f7;opacity:.7}
.tech-particles span:nth-child(1){top:20%;left:15%;animation:float 6s ease-in-out infinite}
.tech-particles span:nth-child(2){top:30%;right:18%;background:#ffd54f;box-shadow:0 0 8px #ffd54f;animation:float 7s ease-in-out infinite 1s}
.tech-particles span:nth-child(3){bottom:25%;left:20%;background:#81c784;box-shadow:0 0 8px #81c784;animation:float 5s ease-in-out infinite .5s}
.tech-particles span:nth-child(4){bottom:30%;right:15%;animation:float 8s ease-in-out infinite 1.5s}
.tech-particles span:nth-child(5){top:50%;left:8%;background:#ffd54f;box-shadow:0 0 8px #ffd54f;animation:float 6.5s ease-in-out infinite 2s}
.tech-particles span:nth-child(6){top:60%;right:8%;background:#ba68c8;box-shadow:0 0 8px #ba68c8;animation:float 7.5s ease-in-out infinite .8s}
.tech-particles span:nth-child(7){top:12%;left:45%;animation:float 9s ease-in-out infinite 1.2s}
.tech-particles span:nth-child(8){bottom:12%;left:48%;background:#ffd54f;box-shadow:0 0 8px #ffd54f;animation:float 6.8s ease-in-out infinite 2.4s}
.tech-labels{position:absolute;inset:0;pointer-events:none}
.tech-label{position:absolute;padding:6px 14px;background:rgba(255,255,255,.12);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.25);border-radius:20px;font-size:12px;color:#fff;white-space:nowrap;box-shadow:0 4px 12px rgba(0,0,0,.15)}
.tech-label-1{top:8%;left:50%;animation:labelFloatX 4s ease-in-out infinite 0s}
.tech-label-2{top:50%;right:0;margin-top:-15px;animation:labelFloatY 4s ease-in-out infinite 1s}
.tech-label-3{bottom:8%;left:50%;animation:labelFloatX 4s ease-in-out infinite 2s}
.tech-label-4{top:50%;left:0;margin-top:-15px;animation:labelFloatY 4s ease-in-out infinite 3s}
.tech-label-1,.tech-label-3{transform:translateX(-50%)}
@keyframes gridMove{0%{background-position:0 0}100%{background-position:30px 30px}}
@keyframes ringSpin{0%{transform:translate(-50%,-50%) rotate(0deg)}100%{transform:translate(-50%,-50%) rotate(360deg)}}
@keyframes pulse{0%{transform:scale(1);opacity:1}100%{transform:scale(1.8);opacity:0}}
@keyframes orbitSpin{0%{transform:translate(-50%,-50%) rotate(0deg)}100%{transform:translate(-50%,-50%) rotate(360deg)}}
@keyframes float{0%,100%{transform:translateY(0);opacity:.7}50%{transform:translateY(-15px);opacity:1}}
@keyframes labelFloatX{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(-8px)}}
@keyframes labelFloatY{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}
@media (max-width:768px){.tech-scene{width:300px;height:300px}.tech-ring-1{width:90px;height:90px}.tech-ring-2{width:150px;height:150px}.tech-ring-3{width:210px;height:210px}.tech-orbit-1{width:120px;height:120px}.tech-orbit-2{width:180px;height:180px}.tech-orbit-3{width:240px;height:240px}.tech-center{width:64px;height:64px}.tech-logo{font-size:26px}}

/* Section通用 */
.section{padding:60px 0}
.section-gray{background:#f7f9fc}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:30px;color:#1a73e8;margin-bottom:10px}
.section-title p{color:#888;font-size:15px}
.section-title .line{width:60px;height:3px;background:#1a73e8;margin:15px auto 0}

/* 服务卡片 */
.services{display:flex;flex-wrap:wrap;gap:25px}
.service-card{flex:1;min-width:260px;background:#fff;padding:35px 25px;border-radius:8px;box-shadow:0 4px 20px rgba(0,0,0,.06);transition:all .3s;border-top:3px solid transparent}
.service-card:hover{transform:translateY(-5px);box-shadow:0 10px 30px rgba(26,115,232,.15);border-top-color:#1a73e8}
.service-card .icon{width:60px;height:60px;background:linear-gradient(135deg,#1a73e8,#4fc3f7);border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:20px}
.service-card .icon span{font-size:28px;color:#fff}
.service-card h3{font-size:20px;margin-bottom:12px;color:#333}
.service-card p{color:#666;font-size:14px;line-height:1.7}

/* 优势列表 */
.advantages{display:flex;flex-wrap:wrap;gap:20px;align-items:center}
.advantages.is-timeline{gap:0;flex-wrap:nowrap}
.advantage-item{flex:1;min-width:220px;text-align:center;padding:30px 20px;background:#fff;border-radius:8px;box-shadow:0 2px 12px rgba(0,0,0,.05);position:relative}
.advantage-item .num{font-size:36px;font-weight:700;color:#1a73e8;margin-bottom:10px}
.advantage-item h4{font-size:16px;margin-bottom:8px}
.advantage-item p{font-size:13px;color:#888}
.timeline-arrow{flex:0 0 40px;display:flex;align-items:center;justify-content:center;color:#1a73e8;font-size:30px;font-weight:700;line-height:1;opacity:.6;animation:arrowPulse 2s ease-in-out infinite}
@keyframes arrowPulse{0%,100%{transform:translateX(0);opacity:.4}50%{transform:translateX(6px);opacity:.9}}
@media (max-width:992px){.advantages.is-timeline{flex-wrap:wrap;gap:20px}.timeline-arrow{flex:0 0 100%;transform:rotate(90deg);font-size:26px}}

/* 文章列表 */
.news-list{display:flex;flex-wrap:wrap;gap:25px;justify-content:center}
.news-item{flex:1 1 300px;min-width:300px;max-width:380px;background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:all .3s}
.news-item:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.1)}
.news-item .img{width:100%;height:200px;overflow:hidden;background:#f0f0f0}
.news-item .img img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.news-item:hover .img img{transform:scale(1.05)}
.news-item .content{padding:20px}
.news-item .content h3{font-size:17px;margin-bottom:10px;line-height:1.4}
.news-item .content h3 a{color:#333}
.news-item .content h3 a:hover{color:#1a73e8}
.news-item .content .meta{font-size:12px;color:#999;margin-bottom:10px}
.news-item .content .meta span{margin-right:12px}
.news-item .content .desc{font-size:13px;color:#666;line-height:1.6;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}

/* 案例列表 */
.case-list{display:flex;flex-wrap:wrap;gap:25px;justify-content:center}
.subnav-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px;padding-bottom:20px;border-bottom:1px solid #eee;justify-content:center}
.subnav-tabs a{display:inline-block;padding:8px 22px;border-radius:20px;background:#f5f5f5;color:#666;font-size:14px;transition:all .3s}
.subnav-tabs a:hover{background:#e8f0fe;color:#1a73e8}
.subnav-tabs a.active{background:#1a73e8;color:#fff}
.case-item{flex:1 1 280px;min-width:280px;max-width:380px;background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,.06);transition:all .3s}
.case-item:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.12)}
.case-item .img{width:100%;height:220px;overflow:hidden;background:#f0f0f0}
.case-item .img img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.case-item:hover .img img{transform:scale(1.05)}
.case-item .content{padding:18px}
.case-item .content h3{font-size:16px;margin-bottom:8px}
.case-item .content h3 a{color:#333}
.case-item .content h3 a:hover{color:#1a73e8}
.case-item .content .meta{font-size:12px;color:#999}

/* 列表页 */
.page-banner{background:linear-gradient(135deg,#1a73e8,#0d47a1);color:#fff;padding:50px 0;text-align:center}
.page-banner h1{font-size:32px;margin-bottom:10px}
.page-banner p{opacity:.9;font-size:15px}
.breadcrumb{background:#f7f9fc;padding:12px 0;font-size:13px;color:#888}
.breadcrumb a{color:#1a73e8}
.breadcrumb .sep{margin:0 8px;color:#ccc}
.main-content{padding:40px 0}
.list-layout{display:flex;gap:30px}
.list-main{flex:1;min-width:0}
.list-sidebar{flex:0 0 280px}
.article-list-item{display:flex;background:#fff;border-radius:8px;overflow:hidden;margin-bottom:20px;box-shadow:0 2px 8px rgba(0,0,0,.05);transition:all .3s}
.article-list-item:hover{box-shadow:0 6px 20px rgba(0,0,0,.1)}
.article-list-item .img{flex:0 0 220px;height:150px;overflow:hidden;background:#f0f0f0}
.article-list-item .img img{width:100%;height:100%;object-fit:cover}
.article-list-item .content{flex:1;padding:20px}
.article-list-item .content h3{font-size:17px;margin-bottom:8px}
.article-list-item .content h3 a{color:#333}
.article-list-item .content h3 a:hover{color:#1a73e8}
.article-list-item .content .meta{font-size:12px;color:#999;margin-bottom:10px}
.article-list-item .content .desc{font-size:13px;color:#666;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

/* 文章详情 */
.article-detail{background:#fff;padding:35px;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,.05)}
.article-detail h1{font-size:26px;margin-bottom:15px;line-height:1.4}
.article-detail .meta{font-size:13px;color:#999;padding-bottom:15px;border-bottom:1px solid #eee;margin-bottom:25px}
.article-detail .meta span{margin-right:20px}
.article-detail .content{font-size:15px;line-height:1.9;color:#444}
.article-detail .content p{margin-bottom:18px}
.article-detail .content img{max-width:100%;height:auto;margin:15px 0;border-radius:4px}
.article-detail .content h2,.article-detail .content h3{margin:25px 0 12px;color:#333}
.article-detail .content a{color:#1a73e8;text-decoration:underline}
.article-detail .content ul,.article-detail .content ol{margin:15px 0;padding-left:25px}
.article-detail .content ul li,.article-detail .content ol li{margin-bottom:8px}
.article-nav{display:flex;justify-content:space-between;margin-top:25px;padding-top:20px;border-top:1px solid #eee;font-size:14px}
.article-nav a{color:#1a73e8}

/* 侧边栏 */
.sidebar-box{background:#fff;padding:20px;border-radius:8px;margin-bottom:20px;box-shadow:0 2px 8px rgba(0,0,0,.05)}
.sidebar-box h3{font-size:16px;margin-bottom:15px;padding-bottom:10px;border-bottom:2px solid #1a73e8;color:#333}
.sidebar-box ul li{padding:8px 0;border-bottom:1px dashed #eee}
.sidebar-box ul li:last-child{border-bottom:0}
.sidebar-box ul li a{color:#666;font-size:13px;display:block;transition:color .3s}
.sidebar-box ul li a:hover{color:#1a73e8}
.sidebar-box ul li .date{font-size:11px;color:#bbb;display:block;margin-top:3px}
.sidebar-contact{text-align:center}
.sidebar-contact .phone{font-size:24px;color:#1a73e8;font-weight:700;margin:10px 0}
.sidebar-contact .qq-btn{display:inline-block;padding:8px 20px;background:#1a73e8;color:#fff;border-radius:20px;font-size:13px;margin-top:10px}

/* 关于我们 */
.about-section{padding:50px 0}
.about-layout{display:flex;gap:40px;align-items:center;flex-wrap:wrap}
.about-text{flex:1;min-width:300px}
.about-text h2{font-size:28px;color:#1a73e8;margin-bottom:20px}
.about-text p{font-size:15px;line-height:1.9;color:#555;margin-bottom:15px}
.about-text .features{margin-top:25px}
.about-text .features li{padding:8px 0;font-size:14px;color:#555}
.about-text .features li:before{content:"\2714";color:#1a73e8;font-weight:bold;margin-right:8px}
.about-image{flex:0 0 400px}
.about-image img{width:100%;border-radius:8px;box-shadow:0 10px 30px rgba(0,0,0,.1)}

/* 联系我们 */
.contact-section{padding:50px 0}
.contact-layout{display:flex;gap:40px;flex-wrap:wrap}
.contact-info{flex:1;min-width:300px}
.contact-info h2{font-size:26px;color:#1a73e8;margin-bottom:25px}
.contact-info ul li{padding:15px 0;border-bottom:1px solid #eee;font-size:15px;display:flex;align-items:center}
.contact-info ul li .label{font-weight:600;color:#333;width:100px}
.contact-info ul li .value{color:#666}
.contact-form{flex:1;min-width:300px;background:#fff;padding:30px;border-radius:8px;box-shadow:0 4px 20px rgba(0,0,0,.06)}
.contact-form h3{font-size:20px;margin-bottom:20px;color:#333}
.contact-form .form-group{margin-bottom:15px}
.contact-form label{display:block;margin-bottom:5px;font-size:14px;color:#555}
.contact-form input,.contact-form textarea{width:100%;padding:10px 12px;border:1px solid #ddd;border-radius:4px;font-size:14px;font-family:inherit}
.contact-form input:focus,.contact-form textarea:focus{outline:0;border-color:#1a73e8}
.contact-form button{background:#1a73e8;color:#fff;border:0;padding:12px 30px;border-radius:4px;font-size:15px;cursor:pointer;transition:background .3s}
.contact-form button:hover{background:#0d47a1}

/* 分页 */
.pagination{text-align:center;padding:20px 0}
.pagination>span{display:inline-block;vertical-align:middle;margin:0 2px}
.pagination .page-status{color:#999;font-size:13px;padding:8px 10px}
.pagination .page-index,.pagination .page-pre,.pagination .page-next,.pagination .page-last,.pagination .page-numbar{padding:0}
.pagination a{display:inline-block;padding:8px 14px;margin:0 2px;border:1px solid #ddd;border-radius:4px;color:#666;font-size:13px;transition:all .3s}
.pagination a:hover,.pagination .page-num-current{background:#1a73e8;color:#fff;border-color:#1a73e8}

/* CTA */
.cta{background:linear-gradient(135deg,#1a73e8,#0d47a1);color:#fff;padding:50px 0;text-align:center}
.cta h2{font-size:28px;margin-bottom:15px}
.cta p{font-size:15px;opacity:.9;margin-bottom:25px}
.cta .btn{display:inline-block;padding:12px 35px;background:#f9a825;color:#fff;border-radius:30px;font-size:15px;font-weight:600;transition:all .3s}
.cta .btn:hover{background:#f57f17;transform:translateY(-2px)}

/* 底部 */
.footer{background:#1a2332;color:#aab;padding:50px 0 0}
.footer-layout{display:flex;flex-wrap:wrap;gap:30px;margin-bottom:30px}
.footer-col{flex:1 1 200px;min-width:200px}
.footer-col h4{color:#fff;font-size:16px;margin-bottom:18px}
.footer-col ul li{padding:6px 0}
.footer-col ul li a{color:#aab;font-size:13px;transition:color .3s}
.footer-col ul li a:hover{color:#fff}
.footer-col .contact-info li{font-size:13px;color:#aab;margin-bottom:10px}
.footer-col .contact-info li .icon{display:inline-block;width:20px;color:#1a73e8}
.footer-bottom{border-top:1px solid #2a3548;padding:20px 0;text-align:center;font-size:12px;color:#778}
.footer-bottom a{color:#778}
.footer-bottom a:hover{color:#aab}

/* 浮动按钮 */
.float-buttons{position:fixed;right:20px;bottom:30px;z-index:999;display:flex;flex-direction:column;gap:10px}
.float-buttons a{display:flex;align-items:center;justify-content:center;width:50px;height:50px;border-radius:50%;background:#1a73e8;color:#fff;font-size:20px;box-shadow:0 4px 12px rgba(0,0,0,.15);transition:all .3s}
.float-buttons a:hover{background:#0d47a1;transform:scale(1.1)}
.float-buttons .back-top{background:#666;opacity:0;visibility:hidden}
.float-buttons .back-top.visible{opacity:1;visibility:visible}

/* 响应式 */
@media (max-width:992px){
  .banner h1{font-size:32px}
  .banner .subtitle{font-size:18px}
  .banner-right{flex:0 0 100%;margin-top:30px}
  .list-sidebar{flex:0 0 100%}
  .about-image{flex:0 0 100%}
}
@media (max-width:768px){
  .topbar .container{justify-content:center;text-align:center}
  .topbar .links{margin-top:5px}
  .nav{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;box-shadow:0 4px 12px rgba(0,0,0,.1);max-height:400px;overflow-y:auto}
  .nav.open{display:block}
  .nav ul{flex-direction:column;width:100%}
  .nav ul li{margin:0}
  .nav ul li a{padding:12px 20px;border-radius:0}
  .nav ul li .submenu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;padding:0;background:#f7f9fc}
  .nav-toggle{display:flex}
  .banner{padding:50px 0}
  .banner h1{font-size:26px}
  .banner .subtitle{font-size:16px}
  .banner-left{max-width:100%;margin-right:0}
  .section{padding:40px 0}
  .section-title h2{font-size:24px}
  .article-list-item{flex-direction:column}
  .article-list-item .img{flex:0 0 180px;width:100%}
  .list-layout{flex-direction:column}
  .article-detail{padding:20px}
  .article-detail h1{font-size:22px}
  .contact-layout{flex-direction:column}
  .footer-layout{flex-wrap:wrap;gap:20px 15px}
  .footer-col{flex:1 1 calc(50% - 8px);min-width:calc(50% - 8px)}
  .float-buttons{right:10px;bottom:20px}
  .float-buttons a{width:42px;height:42px;font-size:18px}
}
@media (max-width:560px){
  .footer-col{flex:1 1 100%;min-width:100%}
  .case-item{flex:1 1 100%;max-width:100%}
  .news-item{flex:1 1 100%;max-width:100%}
}
@media (max-width:480px){
  .banner h1{font-size:22px}
  .banner .desc{font-size:13px}
  .banner .btns{flex-direction:column;width:100%}
  .banner .btn{width:100%;text-align:center;margin-bottom:10px}
  .section-title h2{font-size:20px}
  .article-detail .content{font-size:14px}
  .news-item .img{height:160px}
}