/* 方立科技官网 · 蓝白科技风 */
:root{
  --blue:#0B5BD3; --blue-deep:#0A3D91; --navy:#082B66;
  --cyan:#22D3EE; --bg-alt:#F4F8FF; --ink:#1A2B4A; --gray:#5B6B8C;
  --radius:14px; --shadow:0 6px 24px rgba(10,61,145,.10);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.75;font-size:16px}
a{text-decoration:none;color:inherit}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
img{max-width:100%}

/* 顶栏 */
.topbar{position:fixed;top:0;left:0;right:0;z-index:101;background:var(--navy);color:#B9CCEF;font-size:13px;padding:6px 0}
.topbar .wrap{display:flex;justify-content:space-between}
.topbar-r{color:#fff;font-weight:600}

/* 头部 */
.header{position:fixed;top:32px;left:0;right:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);box-shadow:0 2px 12px rgba(8,43,102,.08)}
.header-in{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;flex-direction:row;align-items:center;gap:10px;line-height:1.15}
.logo-text{display:flex;flex-direction:column}
.logo-cn{font-size:22px;font-weight:800;color:var(--blue-deep);letter-spacing:2px}
.logo-en{font-size:11px;color:var(--blue);letter-spacing:3px;font-weight:600}
.nav{display:flex;gap:6px}
.nav a{padding:8px 14px;border-radius:8px;color:var(--ink);font-size:15px;font-weight:500;transition:.2s}
.nav a:hover{background:var(--bg-alt);color:var(--blue)}
.header-tel{font-weight:700;color:var(--blue);white-space:nowrap;padding:8px 14px;border:1px solid #D4E3FB;border-radius:999px}

/* Hero */
.hero{position:relative;background:linear-gradient(120deg,var(--navy) 0%,var(--blue-deep) 55%,var(--blue) 100%);color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:
  radial-gradient(circle at 80% 20%,rgba(34,211,238,.25),transparent 45%),
  radial-gradient(circle at 15% 85%,rgba(11,91,211,.5),transparent 50%),
  repeating-linear-gradient(0deg,rgba(255,255,255,.045) 0 1px,transparent 1px 56px),
  repeating-linear-gradient(90deg,rgba(255,255,255,.045) 0 1px,transparent 1px 56px)}
.hero-in{position:relative;padding:84px 24px 76px;max-width:1200px;margin:0 auto}
.kicker{display:inline-block;font-size:13px;letter-spacing:4px;color:var(--cyan);font-weight:700;margin-bottom:14px}
.hero h1{font-size:42px;line-height:1.25;font-weight:800;max-width:820px}
.hero p{margin-top:18px;font-size:17px;color:#D6E4FF;max-width:760px}
.hero-home .hero-in{padding:110px 24px 100px}
.hero-cta{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}

/* 按钮 */
.btn{display:inline-block;background:linear-gradient(90deg,var(--blue),#2E7CF0);color:#fff;padding:12px 30px;border-radius:999px;font-weight:600;box-shadow:0 6px 18px rgba(11,91,211,.35);transition:.2s}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(11,91,211,.45)}
.btn-ghost{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.5);box-shadow:none}
.btn-line{background:#fff;color:var(--blue);border:1.5px solid var(--blue);box-shadow:none}
.btn-lg{padding:15px 38px;font-size:17px}

/* 数据条 */
.stats{background:linear-gradient(90deg,#EAF2FF,#F4F8FF);border-bottom:1px solid #E0EBFC}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;padding:34px 24px}
.stat{text-align:center}
.stat b{font-size:38px;color:var(--blue);font-weight:800}
.stat b span{font-size:16px;margin-left:2px}
.stat p{color:var(--gray);font-size:14px;margin-top:2px}

/* 区块 */
.sec{padding:72px 0}
.sec-alt{background:var(--bg-alt)}
.sec-title{font-size:30px;font-weight:800;color:var(--blue-deep);text-align:center;margin-bottom:12px;position:relative;padding-bottom:14px}
.sec-title::after{content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);width:48px;height:4px;border-radius:2px;background:linear-gradient(90deg,var(--blue),var(--cyan))}
.sec-sub{text-align:center;color:var(--gray);margin-bottom:36px}

/* 卡片 */
.card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(255px,1fr));gap:22px;margin-top:36px}
.card-grid-3{grid-template-columns:repeat(auto-fill,minmax(320px,1fr))}
.card{display:block;background:#fff;border:1px solid #E3ECFA;border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);transition:.25s;position:relative;overflow:hidden}
.card::before{content:"";position:absolute;top:0;left:0;right:0;height:3px;background:linear-gradient(90deg,var(--blue),var(--cyan));opacity:0;transition:.25s}
.card:hover{transform:translateY(-5px);box-shadow:0 14px 34px rgba(10,61,145,.16)}
.card:hover::before{opacity:1}
.card h3{font-size:19px;color:var(--blue-deep);margin-bottom:10px;font-weight:700}
.card p{color:var(--gray);font-size:14.5px}
.card-featured{border-color:#BFD6F8;background:linear-gradient(160deg,#fff 60%,#F0F6FF)}
.card-more{display:inline-block;margin-top:14px;color:var(--blue);font-weight:600;font-size:14px}
.center{text-align:center;margin-top:40px}

/* CTA */
.cta{background:linear-gradient(120deg,var(--blue-deep),var(--blue));color:#fff;text-align:center;padding:64px 24px;position:relative;overflow:hidden}
.cta::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 85% 15%,rgba(34,211,238,.3),transparent 40%)}
.cta>*{position:relative}
.cta h2{font-size:28px;font-weight:800}
.cta p{color:#D6E4FF;margin:10px 0 24px}
.cta .btn{background:#fff;color:var(--blue)}

/* 正文 */
.content{max-width:900px}
.content p{margin-bottom:16px;color:#33456B}
.content strong{color:var(--ink)}
.note{margin-top:26px;padding:14px 18px;background:var(--bg-alt);border-left:3px solid var(--blue);border-radius:0 8px 8px 0;color:var(--gray);font-size:14px}
.article p{text-indent:0}

/* 规格表 */
.spec-table{width:100%;border-collapse:collapse;margin-top:24px;background:#fff;box-shadow:var(--shadow);border-radius:var(--radius);overflow:hidden}
.spec-table th{width:180px;text-align:left;padding:14px 18px;background:linear-gradient(120deg,#0A3D91,#0B5BD3);color:#fff;font-weight:600;border-bottom:1px solid rgba(255,255,255,.15)}
.spec-table td{padding:14px 18px;border-bottom:1px solid #EAF1FC;color:#33456B;font-size:14.5px}

/* FAQ */
.faq-item{background:#fff;border:1px solid #E3ECFA;border-radius:12px;padding:20px 24px;margin-bottom:14px;box-shadow:var(--shadow)}
.faq-item h3{font-size:16.5px;color:var(--blue-deep);margin-bottom:8px;font-weight:700}
.faq-item h3::before{content:"Q";display:inline-block;width:24px;height:24px;line-height:24px;text-align:center;background:linear-gradient(120deg,var(--blue),#2E7CF0);color:#fff;border-radius:6px;font-size:13px;margin-right:10px}
.faq-item p{color:var(--gray);font-size:14.5px;padding-left:34px}

/* 案例 */
.case-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:14px;margin-top:30px}
.case-item{background:#fff;border:1px solid #E3ECFA;border-radius:10px;padding:14px 18px;font-weight:600;color:var(--blue-deep);text-align:center;box-shadow:var(--shadow);font-size:14.5px}

/* 新闻 */
.news-list{max-width:860px}
.news-item{display:flex;gap:20px;align-items:baseline;padding:18px 6px;border-bottom:1px dashed #D8E5F9;transition:.2s}
.news-item:hover{background:var(--bg-alt);border-radius:8px;padding-left:14px}
.news-date{color:var(--blue);font-weight:700;font-size:14px;white-space:nowrap;font-family:Consolas,monospace}
.news-title{color:var(--ink);font-size:16px}

/* 联系 */
.contact-wrap{display:flex;justify-content:center}
.contact-card{background:#fff;box-shadow:var(--shadow);border-radius:var(--radius);border-top:4px solid var(--blue);padding:40px 48px;max-width:640px;width:100%}
.contact-card h2{color:var(--blue-deep);margin-bottom:20px}
.contact-card p{margin-bottom:14px;color:#33456B}
.contact-card strong{color:var(--blue-deep);display:inline-block;width:90px}

/* 页脚 */
.footer{background:var(--navy);color:#B9CCEF;padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:40px}
.footer h4{color:#fff;font-size:16px;margin-bottom:16px}
.footer a{display:block;padding:4px 0;font-size:14px;transition:.2s}
.footer a:hover{color:var(--cyan)}
.footer p{font-size:14px;margin-bottom:8px}
.footer-logo{font-size:20px;font-weight:800;color:#fff;margin-bottom:12px}
.copyright{border-top:1px solid rgba(255,255,255,.12);text-align:center;padding:18px;font-size:13px;color:#7E97C4}

@media (max-width:900px){
  .nav{display:none}
  .hero h1{font-size:30px}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .spec-table th{width:110px}
  .sec{padding:52px 0}
}

/* 图版 */
.card-img{display:block;width:100%;height:150px;object-fit:contain;margin-bottom:14px;background:linear-gradient(160deg,#F4F8FF,#EAF2FF);border-radius:10px;padding:10px}
.prod-figure{margin:10px 0 26px;text-align:center}
.prod-figure img{max-height:340px;max-width:100%;border-radius:12px;box-shadow:var(--shadow);background:#fff;padding:12px}
.article-img{text-align:center;margin:18px 0}
.article-img img{max-width:100%;border-radius:10px;box-shadow:var(--shadow)}
.cert-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(200px,1fr));gap:16px;margin-top:30px}
.cert-item img{width:100%;border:1px solid #E3ECFA;border-radius:10px;box-shadow:var(--shadow);background:#fff}

/* 案例图墙 / 合作logo墙 / 视频 */
.case-photo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:18px;margin-top:30px}
.case-photo{background:#fff;border:1px solid #E3ECFA;border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
.case-photo img{width:100%;height:150px;object-fit:cover;display:block;transition:.3s}
.case-photo:hover img{transform:scale(1.06)}
.case-photo figcaption{padding:10px;text-align:center;font-size:14px;font-weight:600;color:var(--blue-deep);background:#F8FBFF}
.logo-wall{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:14px;margin-top:30px}
.logo-wall img{width:100%;height:80px;object-fit:contain;background:#fff;border:1px solid #E3ECFA;border-radius:10px;padding:10px;box-shadow:var(--shadow)}
.video-box{max-width:720px;margin:24px auto;box-shadow:var(--shadow);border-radius:12px;overflow:hidden;background:#000}
.video-box video{width:100%;display:block}
.cert-item figcaption{padding:8px 6px;text-align:center;font-size:13px;font-weight:600;color:var(--blue-deep);background:#F8FBFF;border-top:1px solid #E3ECFA}

/* ===== 全站地图（对应旧站 pc_map） ===== */
.nav-toggle{display:flex;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;padding:9px;border:1px solid #D6E4FA;border-radius:8px;background:#fff;cursor:pointer}
.nav-toggle span{display:block;height:2px;background:var(--blue);border-radius:2px}
.megamap{display:none}
.megamap.open{display:block;position:fixed;top:0;left:0;right:0;bottom:0;z-index:99;overflow-y:auto;
  background:rgba(10,52,116,.85);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px)}
.megamap.open .megamap-grid{padding-top:130px;padding-bottom:70px}
.megamap-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:28px;padding:38px 24px}
.mega-col h5{font-size:19px;margin:0 0 14px}
.mega-col h5 a{color:#fff;text-decoration:none}
.mega-col h5 a:hover{text-decoration:underline}
.mega-col .mega-sub{margin-top:26px;font-size:19px}
.mega-col>a{display:block;color:#CFE2FF;font-size:14px;line-height:2;text-decoration:none}
.mega-col>a:hover{color:#fff;text-decoration:underline}
.mega-col .mega-indent{padding-left:14px}

/* ===== 页内标签（对应旧站 nbox2/nbox3） ===== */
.page-tabs{background:#fff;border-bottom:1px solid #E3ECFA}
.page-tabs .wrap{display:flex;gap:8px;padding-top:0;padding-bottom:0}
.page-tabs a{padding:14px 30px;font-size:16px;font-weight:600;color:var(--ink);text-decoration:none;border:1px solid transparent;border-bottom:none}
.page-tabs a.act{color:var(--blue);border-color:#E3ECFA;background:#F8FBFF;border-radius:10px 10px 0 0}

/* ===== 关于我们左右栏（对应旧站 ab1） ===== */
.about-cols{display:grid;grid-template-columns:260px 1fr;gap:48px;align-items:start}
.about-side{font-size:34px;font-weight:800;line-height:1.25;color:var(--blue);letter-spacing:1px;border-left:4px solid var(--blue);padding-left:22px;position:sticky;top:110px}
.about-text p{margin:0 0 18px}

/* ===== 联系页二维码 ===== */
.contact-wrap{display:grid;grid-template-columns:1fr 240px;gap:40px;align-items:start}
.contact-qr{margin:0;text-align:center}
.contact-qr img{width:100%;border:1px solid #E3ECFA;border-radius:12px;box-shadow:var(--shadow)}
.contact-qr figcaption{margin-top:10px;font-size:14px;color:var(--ink-soft)}

/* ===== 在线客服悬浮窗 ===== */
.kf{position:fixed;right:0;top:50%;margin-top:-70px;z-index:999;display:flex;align-items:center}
.kf-tab{width:46px;border:none;background:linear-gradient(180deg,#1268D1,#0A3E8F);color:#fff;font-size:15px;font-weight:700;padding:16px 0;border-radius:10px 0 0 10px;cursor:pointer;display:flex;flex-direction:column;align-items:center;gap:2px;box-shadow:-4px 4px 16px rgba(10,52,116,.3)}
.kf-tab b{font-weight:700}
.kf-panel{display:none;width:250px;background:#fff;border:1px solid #E3ECFA;border-right:none;border-radius:12px 0 0 12px;box-shadow:-8px 8px 30px rgba(10,52,116,.18);overflow:hidden}
.kf.open .kf-panel{display:block}
.kf.open .kf-tab{border-radius:0}
.kf-title{background:linear-gradient(135deg,#0A3E8F,#1268D1);color:#fff;font-weight:700;padding:12px 16px;font-size:15px}
.kf-item{display:flex;gap:10px;align-items:center;padding:11px 14px;color:var(--ink);text-decoration:none;border-bottom:1px solid #F0F5FD;font-size:12px}
.kf-item:last-child{border-bottom:none}
.kf-item:hover{background:#F8FBFF}
.kf-item .kf-ico{font-size:18px}
.kf-item span{line-height:1.5}
.kf-item strong{display:block;font-size:13px;color:var(--blue)}

body{padding-top:104px}

/* ===== 在线客服（对应旧站爱番番窗口） ===== */
.kf-tab{display:flex;flex-direction:column;align-items:center;gap:6px}
.kf-tab-avatar{width:34px;height:34px;border-radius:50%;object-fit:cover;border:2px solid #fff;box-shadow:0 2px 8px rgba(0,0,0,.25)}
.kf-chat{display:none;position:fixed;right:24px;bottom:24px;width:760px;max-width:94vw;background:#fff;border-radius:12px;box-shadow:0 12px 48px rgba(8,43,102,.28);overflow:hidden;z-index:1000}
.kf.open .kf-chat{display:block}
.kf-chat-head{display:flex;align-items:center;gap:10px;background:#4E7FF2;padding:12px 16px;color:#fff}
.kf-chat-avatar{width:38px;height:38px;border-radius:50%;object-fit:cover;border:2px solid #fff}
.kf-chat-title{font-size:15px;font-weight:700;flex:1}
.kf-chat-close{background:none;border:none;color:#fff;font-size:22px;line-height:1;cursor:pointer;padding:0 4px}
.kf-chat-body{display:grid;grid-template-columns:1.25fr 1fr;min-height:300px}
.kf-chat-main{padding:16px;border-right:1px solid #F0F5FD}
.kf-chat-welcome{background:#F4F8FF;border:1px solid #E3ECFA;border-radius:8px;padding:10px 12px;font-size:13px;color:var(--ink);margin-bottom:12px}
.kf-log{max-height:110px;overflow-y:auto;margin-bottom:10px}
.kf-bubble{background:#EAF2FF;border:1px solid #D6E4FA;border-radius:8px;padding:7px 10px;font-size:12px;color:var(--ink);margin-bottom:6px;word-break:break-all}
.kf-attach{background:#fff;border:1px solid #E3ECFA;border-radius:6px;padding:8px 10px;font-size:15px;cursor:pointer;line-height:1}
.kf-attach:hover{border-color:#4E7FF2}
.kf-form textarea,.kf-form input{display:block;width:100%;box-sizing:border-box;border:1px solid #E3ECFA;border-radius:6px;padding:9px 10px;font-size:13px;margin-bottom:8px;font-family:inherit;resize:vertical}
.kf-form textarea:focus,.kf-form input:focus{outline:none;border-color:#4E7FF2}
.kf-submit{display:block;width:70%;margin:4px auto 0;background:#4E7FF2;color:#fff;border:none;border-radius:6px;padding:10px 0;font-size:14px;font-weight:700;cursor:pointer}
.kf-submit:hover{background:#3A6BE0}
.kf-chat-side{padding:20px 16px;text-align:center}
.kf-side-logo{width:84px;height:84px;object-fit:contain}
.kf-side-name{font-size:22px;font-weight:800;color:var(--blue-deep);margin:8px 0 14px}
.kf-chat-side p{font-size:13px;color:var(--ink-soft);line-height:1.9}
.kf-chat-foot{border-top:1px solid #F0F5FD;padding:10px 16px;background:#FBFCFF}
.kf-chips{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:8px}
.kf-chip{border:1px solid #4E7FF2;color:#4E7FF2;background:#fff;border-radius:999px;padding:4px 12px;font-size:12px;cursor:pointer}
.kf-chip:hover{background:#4E7FF2;color:#fff}
.kf-sendrow{display:flex;gap:8px;align-items:center}
.kf-sendrow input{flex:1;border:1px solid #E3ECFA;border-radius:6px;padding:9px 10px;font-size:13px}
.kf-sendrow input:focus{outline:none;border-color:#4E7FF2}
.kf-telbtn{background:#4E7FF2;color:#fff;border-radius:6px;padding:9px 14px;font-size:13px;font-weight:600;text-decoration:none;white-space:nowrap}
.kf-send{background:#4E7FF2;color:#fff;border:none;border-radius:6px;padding:9px 18px;font-size:13px;font-weight:700;cursor:pointer}
.kf-send:hover,.kf-telbtn:hover{background:#3A6BE0}
@media (max-width:768px){
  .kf-chat{right:8px;bottom:8px;max-width:96vw}
  .kf-chat-body{grid-template-columns:1fr}
  .kf-chat-main{border-right:none;border-bottom:1px solid #F0F5FD}
  .kf-chat-side{display:none}
}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  .megamap-grid{grid-template-columns:repeat(2,1fr);gap:20px;padding:24px 16px}
  .about-cols{grid-template-columns:1fr;gap:24px}
  .about-side{position:static;font-size:26px}
  .contact-wrap{grid-template-columns:1fr}
  .contact-qr{max-width:240px;margin:0 auto}
}
@media (max-width:768px){
  .nav{display:none}
  /* 手机端：顶栏改为静态（不悬浮），热线省略 slogan 防换行；
     头部改为 sticky——初始跟在顶栏下面，滚动后吸顶，互不遮挡 */
  .topbar{position:static}
  .topbar .wrap{flex-direction:column;gap:2px;padding-top:2px;padding-bottom:2px}
  .topbar .wrap>span:first-child{display:none}
  .topbar-r{white-space:nowrap;font-size:12px}
  .header{position:sticky;top:0}
}