/* ============================================================
   雪豹拓客 AI获客官网 - 前台样式（深蓝科技风 / 响应式）
   ============================================================ */
:root{
  --blue-900:#061634; --blue-800:#0a2a66; --blue-700:#0d3a8c;
  --blue-600:#0d47a1; --blue-500:#1565c0; --blue-400:#1e88e5;
  --cyan:#00b4d8; --cyan-soft:#48cae4;
  --ink:#1b2438; --gray:#5b6b86; --line:#e6ecf6;
  --bg:#f5f8fd; --white:#fff; --radius:14px;
  --shadow:0 10px 30px rgba(13,58,140,.10);
  --shadow-hover:0 16px 40px rgba(13,58,140,.18);
  --maxw:1200px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Microsoft YaHei","PingFang SC",-apple-system,"Segoe UI",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none;transition:.2s}
img{max-width:100%;display:block}
ul{list-style:none}
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
.section{padding:70px 0}
.section-sm{padding:50px 0}
.text-center{text-align:center}
.muted{color:var(--gray)}

/* 标题 */
.sec-head{text-align:center;max-width:760px;margin:0 auto 46px}
.sec-head .eyebrow{color:var(--cyan);font-weight:700;letter-spacing:2px;font-size:14px}
.sec-head h2{font-size:34px;color:var(--blue-800);margin:8px 0 12px;font-weight:800}
.sec-head p{color:var(--gray);font-size:16px}
.sec-head .bar{width:60px;height:4px;background:linear-gradient(90deg,var(--blue-500),var(--cyan));
  margin:16px auto 0;border-radius:4px}

/* ---------------- 头部导航 ---------------- */
.site-header{position:sticky;top:0;z-index:99;background:rgba(6,22,52,.96);
  backdrop-filter:blur(8px);box-shadow:0 2px 16px rgba(0,0,0,.18)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo img{height:42px}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{color:#cfe0ff;padding:10px 16px;border-radius:8px;font-size:16px;font-weight:600}
.main-nav a:hover{color:#fff;background:rgba(255,255,255,.08)}
.main-nav a.active{color:#fff}
.main-nav a.active::after{content:"";display:block;height:3px;background:var(--cyan);border-radius:3px;margin-top:4px}
.nav-cta{background:linear-gradient(90deg,var(--blue-500),var(--cyan));color:#fff !important;
  padding:9px 20px !important;border-radius:24px !important;margin-left:8px}
.nav-cta:hover{box-shadow:0 6px 18px rgba(0,180,216,.45)}
.nav-toggle{display:none;background:none;border:0;color:#fff;font-size:26px;cursor:pointer}

/* ---------------- 首页 Hero ---------------- */
.hero{position:relative;background:
  radial-gradient(1200px 500px at 80% -10%,rgba(0,180,216,.35),transparent),
  linear-gradient(135deg,var(--blue-900),var(--blue-700) 60%,var(--blue-500));
  color:#fff;overflow:hidden;padding:90px 0 110px}
.hero::after{content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),
  linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);
  background-size:46px 46px;mask-image:radial-gradient(circle at 50% 30%,#000,transparent 75%)}
.hero .container{position:relative;z-index:2;display:flex;align-items:center;gap:40px;flex-wrap:wrap}
.hero-text{flex:1 1 520px}
.hero h1{font-size:48px;line-height:1.25;font-weight:900;letter-spacing:1px}
.hero h1 .hl{background:linear-gradient(90deg,var(--cyan-soft),#fff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .sub{font-size:20px;margin:22px 0 30px;color:#d6e4ff;max-width:600px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:30px;
  font-size:17px;font-weight:700;cursor:pointer;border:0}
.btn-primary{background:linear-gradient(90deg,var(--cyan),#3ad6c8);color:#06283d;box-shadow:0 10px 26px rgba(0,180,216,.4)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 32px rgba(0,180,216,.55)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.4)}
.btn-ghost:hover{background:rgba(255,255,255,.18)}
.hero-stats{display:flex;gap:34px;margin-top:42px;flex-wrap:wrap}
.hero-stats .num{font-size:30px;font-weight:900;color:var(--cyan-soft)}
.hero-stats .lab{font-size:14px;color:#bcd0f5}
.hero-visual{flex:1 1 380px;display:flex;justify-content:center}
.hero-card{width:100%;max-width:420px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);
  border-radius:18px;padding:26px;backdrop-filter:blur(6px);box-shadow:var(--shadow)}
.hero-card h3{font-size:18px;margin-bottom:16px;color:#fff}
.hero-card .row{display:flex;justify-content:space-between;padding:12px 0;border-bottom:1px dashed rgba(255,255,255,.16);font-size:14px;color:#d6e4ff}
.hero-card .row:last-child{border-bottom:0}
.hero-card .dot{display:inline-block;width:8px;height:8px;border-radius:50%;background:var(--cyan);margin-right:8px}
.pulse{animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}

/* ---------------- 通用卡片栅格 ---------------- */
.grid{display:grid;gap:26px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}

/* 优势 */
.adv-card{background:var(--white);border-radius:var(--radius);padding:32px 26px;text-align:center;
  box-shadow:var(--shadow);border:1px solid var(--line);transition:.25s}
.adv-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.adv-ic{width:64px;height:64px;margin:0 auto 18px;border-radius:16px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--blue-500),var(--cyan));color:#fff;font-size:30px;font-weight:800}
.adv-card h3{font-size:20px;color:var(--blue-800);margin-bottom:10px}
.adv-card p{color:var(--gray);font-size:15px}

/* 产品矩阵 */
.prod-card{background:var(--white);border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow);transition:.25s;display:flex;flex-direction:column}
.prod-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.prod-card .thumb{aspect-ratio:16/10;overflow:hidden;background:#eaf1fb}
.prod-card .thumb img{width:100%;height:100%;object-fit:cover}
.prod-card .body{padding:22px;flex:1;display:flex;flex-direction:column}
.prod-card .tag{display:inline-block;font-size:12px;color:var(--blue-600);background:#e8f1ff;
  padding:3px 10px;border-radius:20px;margin-bottom:10px;align-self:flex-start}
.prod-card h3{font-size:21px;color:var(--blue-800)}
.prod-card .slo{color:var(--gray);font-size:14px;margin:8px 0 14px}
.prod-card .more{margin-top:auto;color:var(--blue-600);font-weight:700}
.prod-card:hover .more{color:var(--cyan)}

/* 区块底色交替 */
.bg-white{background:var(--white)}
.bg-soft{background:linear-gradient(180deg,#eef4fd,#f5f8fd)}
.bg-dark{background:linear-gradient(135deg,var(--blue-900),var(--blue-700));color:#fff}
.bg-dark .sec-head h2{color:#fff}
.bg-dark .sec-head p{color:#cfe0ff}

/* 客户案例/合作 */
.case-grid{grid-template-columns:repeat(3,1fr)}
.case-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.16);border-radius:var(--radius);
  padding:26px;transition:.25s}
.case-card:hover{background:rgba(255,255,255,.12)}
.case-card .big{font-size:30px;font-weight:900;color:var(--cyan-soft)}
.case-card p{color:#d6e4ff;font-size:15px;margin-top:8px}
.partners{display:flex;flex-wrap:wrap;gap:18px;justify-content:center;margin-top:34px}
.partners img{height:62px;background:#fff;border-radius:12px;padding:6px 14px;box-shadow:var(--shadow)}

/* 新闻 */
.news-card{background:var(--white);border-radius:var(--radius);overflow:hidden;border:1px solid var(--line);
  box-shadow:var(--shadow);transition:.25s}
.news-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.news-card .thumb{aspect-ratio:16/9;overflow:hidden}
.news-card .thumb img{width:100%;height:100%;object-fit:cover}
.news-card .body{padding:20px}
.news-card .meta{font-size:13px;color:var(--gray);display:flex;gap:12px;margin-bottom:8px}
.news-card .cat{color:var(--blue-600);background:#e8f1ff;padding:2px 10px;border-radius:20px}
.news-card h3{font-size:19px;color:var(--ink);line-height:1.45;margin-bottom:10px}
.news-card h3 a:hover{color:var(--blue-600)}
.news-card .sum{color:var(--gray);font-size:14px}

/* CTA 横幅 */
.cta-band{background:linear-gradient(90deg,var(--blue-600),var(--cyan));color:#fff;border-radius:18px;
  padding:44px 40px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  box-shadow:var(--shadow)}
.cta-band h2{font-size:28px}
.cta-band p{opacity:.92;margin-top:6px}

/* 面包屑 */
.crumb{font-size:14px;color:var(--gray);padding:18px 0 0}
.crumb a:hover{color:var(--blue-600)}

/* ---------------- 内页通用 ---------------- */
.page-hero{background:linear-gradient(135deg,var(--blue-900),var(--blue-600));color:#fff;padding:64px 0}
.page-hero h1{font-size:38px;font-weight:900}
.page-hero p{color:#d6e4ff;margin-top:10px;font-size:17px;max-width:760px}

/* 产品详情 */
.prod-detail .hero2{display:flex;gap:40px;flex-wrap:wrap;align-items:center}
.prod-detail .hero2 .pic{flex:1 1 420px}
.prod-detail .hero2 .pic img{border-radius:var(--radius);box-shadow:var(--shadow)}
.prod-detail .hero2 .info{flex:1 1 420px}
.prod-detail .hero2 h1{font-size:34px;color:var(--blue-800)}
.prod-detail .hero2 .slo{font-size:18px;color:var(--blue-600);margin:10px 0 18px}
.prod-detail .intro{margin-top:14px;color:var(--gray)}
.feature-list{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:10px}
.feature-item{display:flex;gap:14px;background:var(--white);border:1px solid var(--line);border-radius:12px;padding:18px;box-shadow:var(--shadow)}
.feature-item .fi-ic{flex:0 0 42px;height:42px;border-radius:10px;background:linear-gradient(135deg,var(--blue-500),var(--cyan));
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800}
.feature-item h4{color:var(--blue-800);margin-bottom:4px}
.feature-item p{color:var(--gray);font-size:14px}
.process-steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:10px}
.process-steps .step{position:relative;background:var(--white);border:1px solid var(--line);border-radius:12px;padding:24px 18px;box-shadow:var(--shadow)}
.process-steps .step::before{counter-increment:s;content:counter(s);position:absolute;top:-16px;left:20px;width:36px;height:36px;
  border-radius:50%;background:var(--blue-600);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800}
.process-steps h4{margin:6px 0 6px;color:var(--blue-800)}
.process-steps p{color:var(--gray);font-size:14px}

/* 解决方案 */
.sol-card{display:flex;gap:28px;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px;box-shadow:var(--shadow);margin-bottom:24px;flex-wrap:wrap}
.sol-card .pic{flex:0 0 280px}
.sol-card .pic img{border-radius:12px}
.sol-card .txt{flex:1 1 360px}
.sol-card h3{font-size:24px;color:var(--blue-800);margin-bottom:8px}
.sol-card .sum{color:var(--blue-600);font-weight:600;margin-bottom:12px}
.sol-card .txt p{color:var(--gray)}

/* 关于我们 */
.timeline{position:relative;margin-top:20px;padding-left:30px}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:3px;background:linear-gradient(var(--blue-500),var(--cyan));border-radius:3px}
.tl-item{position:relative;padding:0 0 26px 22px}
.tl-item::before{content:"";position:absolute;left:-26px;top:4px;width:16px;height:16px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 4px #dff4fb}
.tl-item .yr{font-weight:800;color:var(--blue-600)}
.tl-item h4{font-size:18px;color:var(--blue-800);margin:4px 0}
.value-grid .v-item{background:var(--white);border:1px solid var(--line);border-radius:12px;padding:24px;box-shadow:var(--shadow)}
.value-grid h4{color:var(--blue-800);margin-bottom:8px}
.value-grid p{color:var(--gray);font-size:14px}

/* 新闻列表 */
.news-layout{display:grid;grid-template-columns:1fr 300px;gap:34px;align-items:start}
.news-list .news-card{display:flex;margin-bottom:24px}
.news-list .news-card .thumb{flex:0 0 240px;aspect-ratio:auto}
.news-list .news-card .body{flex:1;padding:22px}
.news-side{position:sticky;top:90px}
.side-box{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);margin-bottom:22px}
.side-box h4{color:var(--blue-800);margin-bottom:14px;border-left:4px solid var(--cyan);padding-left:10px}
.side-box a{display:block;padding:9px 0;border-bottom:1px dashed var(--line);color:var(--ink);font-size:15px}
.side-box a:last-child{border-bottom:0}
.side-box a:hover{color:var(--blue-600)}
.cat-tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:26px}
.cat-tabs a{padding:8px 18px;border-radius:22px;background:var(--white);border:1px solid var(--line);color:var(--gray);font-weight:600}
.cat-tabs a.active{background:var(--blue-600);color:#fff;border-color:var(--blue-600)}

/* 文章详情 */
.article{max-width:820px;margin:0 auto;background:var(--white);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:40px;margin-top:30px}
.article h1{font-size:30px;color:var(--blue-800);line-height:1.4}
.article .meta{color:var(--gray);font-size:14px;margin:14px 0 24px;padding-bottom:16px;border-bottom:1px solid var(--line);display:flex;gap:16px;flex-wrap:wrap}
.article .content{font-size:16px;color:#2c3a55;line-height:1.9}
.article .content img{max-width:100%;border-radius:10px;margin:18px 0}
.article .content h2,.article .content h3{color:var(--blue-800);margin:24px 0 12px}
.article .content p{margin:12px 0}
.article .content a{color:var(--blue-600);text-decoration:underline}

/* 联系我们 */
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:36px;align-items:start}
.contact-info .ci{display:flex;gap:16px;background:var(--white);border:1px solid var(--line);border-radius:12px;
  padding:20px;margin-bottom:16px;box-shadow:var(--shadow)}
.contact-info .ci .ic{width:48px;height:48px;border-radius:12px;flex:0 0 48px;background:linear-gradient(135deg,var(--blue-500),var(--cyan));color:#fff;display:flex;align-items:center;justify-content:center;font-size:22px}
.contact-info .ci h4{color:var(--blue-800);font-size:16px}
.contact-info .ci p{color:var(--gray);font-size:15px}
.contact-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow);text-align:center}
.contact-card img.qr{width:200px;margin:10px auto 16px;border:1px solid var(--line);border-radius:12px}
.contact-form{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow)}
.contact-form .field{margin-bottom:16px}
.contact-form label{display:block;font-weight:600;color:var(--blue-800);margin-bottom:6px}
.contact-form input,.contact-form textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit}
.contact-form input:focus,.contact-form textarea:focus{outline:0;border-color:var(--blue-500);box-shadow:0 0 0 3px rgba(21,101,192,.12)}
.form-note{padding:12px 16px;border-radius:10px;margin-bottom:16px;font-size:14px}
.form-note.ok{background:#e7f7ee;color:#1b7a45}
.form-note.err{background:#fdeaea;color:#b3261e}

/* ---------------- 页脚 ---------------- */
.site-footer{background:var(--blue-900);color:#cdddf7;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:34px;padding:56px 0 30px}
.f-logo{height:46px;margin-bottom:16px}
.f-desc{font-size:14px;line-height:1.8;margin-bottom:18px;color:#9fb6dd}
.f-contact p{font-size:14px;margin:6px 0;color:#cdddf7}
.f-contact a{color:var(--cyan-soft)}
.f-col h4{color:#fff;font-size:17px;margin-bottom:16px;position:relative;padding-left:12px}
.f-col h4::before{content:"";position:absolute;left:0;top:4px;width:4px;height:16px;background:var(--cyan);border-radius:3px}
.f-col ul li{margin:8px 0}
.f-col ul li a{color:#aeC4e8;font-size:14px}
.f-col ul li a:hover{color:var(--cyan-soft)}
.f-qr img{width:130px;border-radius:10px;background:#fff;padding:6px;margin-bottom:8px}
.f-qr p{font-size:13px;color:#9fb6dd}
.footer-bar{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;font-size:13px;color:#8fa6cf;text-align:center}
.footer-bar a{color:var(--cyan-soft)}
.footer-bar .flinks a{margin:0 6px}
.footer-bar p{margin:4px 0}

/* 悬浮客服 */
.float-bar{position:fixed;right:22px;bottom:90px;z-index:60;display:flex;flex-direction:column;gap:12px}
.float-btn{width:50px;height:50px;border-radius:50%;background:linear-gradient(135deg,var(--blue-500),var(--cyan));
  color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 20px rgba(13,58,140,.4);
  font-size:18px;font-weight:700;cursor:pointer;transition:.2s}
.float-btn:hover{transform:scale(1.08)}
.qr-pop{position:fixed;right:84px;bottom:90px;z-index:60;background:#fff;border-radius:14px;padding:16px;
  box-shadow:var(--shadow-hover);text-align:center;display:none;width:200px}
.qr-pop.show{display:block;animation:fade .2s}
.qr-pop img{width:160px;border-radius:8px}
.qr-pop p{font-size:13px;color:var(--blue-800);margin-top:8px;font-weight:600}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}

/* 分页 */
.pager{display:flex;gap:8px;justify-content:center;margin:30px 0;flex-wrap:wrap}
.pager a{padding:8px 14px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink)}
.pager a.active{background:var(--blue-600);color:#fff;border-color:var(--blue-600)}

/* ---------------- 响应式 ---------------- */
@media (max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .process-steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .news-layout{grid-template-columns:1fr}
  .news-side{position:static}
  .contact-grid{grid-template-columns:1fr}
}
@media (max-width:768px){
  .nav-toggle{display:block}
  .main-nav{position:absolute;top:72px;left:0;right:0;background:var(--blue-900);
    flex-direction:column;align-items:stretch;gap:0;padding:10px 20px 18px;display:none;box-shadow:0 12px 24px rgba(0,0,0,.3)}
  .main-nav.open{display:flex}
  .main-nav a{padding:14px 8px;border-bottom:1px solid rgba(255,255,255,.08)}
  .main-nav a.active::after{display:none}
  .nav-cta{margin:10px 0 0 !important;text-align:center}
  .hero{padding:60px 0 70px}
  .hero h1{font-size:32px}
  .hero .sub{font-size:16px}
  .hero-stats{gap:20px}
  .sec-head h2{font-size:26px}
  .grid-4,.grid-3,.grid-2,.case-grid,.feature-list,.process-steps{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .news-list .news-card{flex-direction:column}
  .news-list .news-card .thumb{flex:auto;aspect-ratio:16/9}
  .sol-card .pic{flex:auto}
  .sol-card .pic img{width:100%}
  .cta-band{flex-direction:column;align-items:flex-start;padding:30px 24px}
  .article{padding:24px}
  .float-bar{bottom:20px;right:14px}
  .qr-pop{right:74px;bottom:20px}
}