/* ============================================================
   buhuoxia.cn 品牌展示站 · 共享样式（纯展示版 / 路线B）
   品牌色：#0A84FF / 渐变 #5B6CFF→#0A84FF
   ============================================================ */
:root{
  --primary:#0A84FF;
  --primary-2:#5B6CFF;
  --grad:linear-gradient(135deg,#5B6CFF 0%,#0A84FF 100%);
  --ink:#0f172a;
  --muted:#64748b;
  --soft:#94a3b8;
  --bg:#ffffff;
  --bg-soft:#f6f8fc;
  --border:#e6ebf2;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 8px 30px rgba(15,23,42,.07);
  --shadow-sm:0 2px 10px rgba(15,23,42,.05);
  --maxw:1120px;
  --wx:#07C160;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",Segoe UI,Roboto,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}
.center{text-align:center}

/* ---------- 导航 ---------- */
.navbar{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--border);
}
.navbar .wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:.5px}
.brand img{width:34px;height:34px;border-radius:9px}
.brand small{font-weight:500;color:var(--muted);font-size:13px;margin-left:2px}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{color:var(--muted);font-size:15px;font-weight:500;transition:color .2s}
.nav-links a:hover{color:var(--primary)}
.nav-links a.cta{
  background:var(--grad);color:#fff;padding:9px 18px;border-radius:999px;font-weight:600;
  box-shadow:0 6px 18px rgba(10,132,255,.28);
}
.nav-links a.cta:hover{color:#fff;opacity:.94}
.nav-toggle{display:none;background:none;border:none;font-size:26px;cursor:pointer;color:var(--ink)}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-weight:600;font-size:15px;cursor:pointer;
  border:1px solid transparent;transition:transform .15s,box-shadow .2s,opacity .2s;
}
.btn:hover{transform:translateY(-1px)}
.btn.primary{background:var(--grad);color:#fff;box-shadow:0 8px 22px rgba(10,132,255,.30)}
.btn.ghost{background:#fff;color:var(--primary);border-color:var(--primary)}
.btn.ghost:hover{background:#eef5ff}
.btn.light{background:rgba(255,255,255,.16);color:#fff;border-color:rgba(255,255,255,.5)}
.btn.light:hover{background:rgba(255,255,255,.26)}
.btn.sm{padding:9px 18px;font-size:14px}

/* ---------- Hero ---------- */
.hero{padding:84px 0 64px;text-align:center}
.hero .tag{
  display:inline-block;background:#eef4ff;color:var(--primary);font-weight:600;
  font-size:13px;padding:6px 14px;border-radius:999px;margin-bottom:22px;
}
.hero h1{font-size:46px;line-height:1.2;font-weight:800;letter-spacing:-.5px}
.hero h1 .grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p{font-size:18px;color:var(--muted);max-width:680px;margin:20px auto 32px}
.hero .actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ---------- 区块 ---------- */
section.block{padding:64px 0}
.section-head{text-align:center;max-width:720px;margin:0 auto 44px}
.section-head .eyebrow{color:var(--primary);font-weight:700;font-size:14px;letter-spacing:2px;text-transform:uppercase}
.section-head h2{font-size:34px;font-weight:800;margin:10px 0 12px;letter-spacing:-.4px}
.section-head p{color:var(--muted);font-size:16px}
.bg-soft{background:var(--bg-soft)}

/* ---------- 卡片网格 ---------- */
.grid{display:grid;gap:22px}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.grid.cols-2{grid-template-columns:repeat(2,1fr)}
.card{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow-sm);transition:transform .18s,box-shadow .18s;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.card .ico{
  width:50px;height:50px;border-radius:13px;background:var(--grad);
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:24px;font-weight:800;margin-bottom:16px;
}
.card h3{font-size:20px;margin-bottom:8px}
.card p{color:var(--muted);font-size:15px}
.card .price{font-size:28px;font-weight:800;color:var(--primary);margin:6px 0}
.card ul{list-style:none;margin:14px 0 18px;color:var(--muted);font-size:14px}
.card ul li{padding:5px 0 5px 22px;position:relative}
.card ul li:before{content:"";position:absolute;left:0;top:13px;width:8px;height:8px;border-radius:50%;background:var(--grad)}
.card .more{color:var(--primary);font-weight:600;font-size:14px}

/* ---------- 产品矩阵 ---------- */
.product-card{display:flex;flex-direction:column;gap:6px}
.product-card .badge{font-size:12px;font-weight:700;color:#fff;background:var(--grad);align-self:flex-start;padding:3px 10px;border-radius:999px}
.status-pill{display:inline-block;font-size:12px;font-weight:600;padding:3px 10px;border-radius:999px}
.status-pill.live{background:#e7f8ee;color:#16a34a}
.status-pill.soon{background:#fff4e5;color:#d97706}

/* ---------- CTA 区 ---------- */
.cta-box{
  background:var(--grad);border-radius:24px;padding:48px;color:#fff;text-align:center;
}
.cta-box h2{font-size:30px;margin-bottom:12px}
.cta-box p{opacity:.92;font-size:16px;margin-bottom:26px}

/* ---------- 二维码 / 留资 ---------- */
.qr-card{display:flex;gap:24px;align-items:center;flex-wrap:wrap;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm)}
.qr-card img{width:200px;height:250px;border-radius:12px}
.qr-info h3{font-size:20px;margin-bottom:8px}
.qr-info p{color:var(--muted);font-size:14px;margin-bottom:14px;max-width:360px}
.contact-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap;margin-top:8px}
.contact-pill{display:inline-flex;align-items:center;gap:8px;background:var(--bg-soft);border:1px solid var(--border);border-radius:999px;padding:8px 14px;font-size:14px;font-weight:600}
.contact-pill .dot{width:8px;height:8px;border-radius:50%;background:var(--wx)}
.copy-btn{background:var(--grad);color:#fff;border:none;border-radius:999px;padding:9px 16px;font-size:14px;font-weight:600;cursor:pointer}
.copy-btn:active{opacity:.85}
/* ---------- 步骤 / 列表 ---------- */
.steps{counter-reset:s}
.step{display:flex;gap:18px;align-items:flex-start;padding:18px 0;border-bottom:1px solid var(--border)}
.step:last-child{border-bottom:none}
.step .num{counter-increment:s;flex:0 0 42px;width:42px;height:42px;border-radius:12px;background:var(--grad);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:18px}
.step .num:before{content:counter(s)}
.step h4{font-size:17px;margin-bottom:4px}
.step p{color:var(--muted);font-size:14px}

/* ---------- 服务流程图 ---------- */
.flow{display:flex;align-items:stretch;gap:0;flex-wrap:wrap}
.flow .node{flex:1 1 180px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:30px 18px 22px;text-align:center;position:relative;margin:10px 0}
.flow .node .n{position:absolute;top:-14px;left:50%;transform:translateX(-50%);width:28px;height:28px;border-radius:50%;background:var(--grad);color:#fff;font-weight:800;font-size:14px;display:flex;align-items:center;justify-content:center;box-shadow:0 2px 6px rgba(10,132,255,.3)}
.flow .node h4{font-size:16px;margin:6px 0 6px}
.flow .node p{color:var(--muted);font-size:13px;margin:0}
.flow .node .ico{width:50px;height:50px;border-radius:13px;background:var(--grad);display:flex;align-items:center;justify-content:center;color:#fff;font-size:24px;font-weight:800;margin:0 auto 14px}
.flow .arrow{flex:0 0 32px;display:flex;align-items:center;justify-content:center;color:var(--primary);font-size:22px;font-weight:700}
@media (max-width:900px){
  .flow{flex-direction:column}
  .flow .arrow{transform:rotate(90deg);flex:0 0 28px}
}

/* ---------- 案例区 ---------- */
.cases{display:grid;gap:18px;grid-template-columns:repeat(3,1fr)}
.case{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm)}
.case .tagline{display:inline-block;font-size:12px;font-weight:700;color:var(--primary);background:rgba(10,132,255,.08);border-radius:999px;padding:3px 10px;margin-bottom:12px}
.case h4{font-size:17px;margin-bottom:10px}
.case dl{margin:0;font-size:13px;line-height:1.7}
.case dt{color:var(--muted);font-weight:600}
.case dd{margin:0 0 8px;color:#1e293b}
@media (max-width:900px){.cases{grid-template-columns:1fr}}

/* ---------- FAQ ---------- */
.faq details{border:1px solid var(--border);border-radius:12px;padding:0 18px;margin-bottom:12px;background:#fff}
.faq summary{cursor:pointer;font-weight:600;font-size:15px;padding:16px 0;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";font-size:20px;color:var(--primary);font-weight:400}
.faq details[open] summary:after{content:"\2212"}
.faq details div{padding:0 0 16px;color:var(--muted);font-size:14px;line-height:1.7}

/* ---------- 博客 ---------- */
.post{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:transform .18s,box-shadow .18s;background:#fff}
.post:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.post .thumb{height:150px;background:var(--grad)}
.post .body{padding:20px}
.post .meta{font-size:12px;color:var(--soft);margin-bottom:8px}
.post h3{font-size:18px;margin-bottom:8px}
.post p{color:var(--muted);font-size:14px}
.post .more{display:inline-block;margin-top:12px;color:var(--primary);font-weight:600;font-size:14px}

/* ---------- 文章正文 ---------- */
.article{max-width:760px;margin:0 auto}
.article h1{font-size:36px;margin:14px 0 10px;letter-spacing:-.4px}
.article h2{font-size:24px;margin:34px 0 12px}
.article h3{font-size:19px;margin:24px 0 10px}
.article p{margin:14px 0;color:#334155;font-size:16px}
.article ul{margin:14px 0 14px 22px;color:#334155}
.article li{margin:6px 0}
.article blockquote{margin:18px 0;padding:14px 18px;border-left:4px solid var(--primary);background:var(--bg-soft);border-radius:0 10px 10px 0;color:var(--muted)}

/* ---------- 表单 ---------- */
.form{max-width:520px}
.form label{display:block;font-weight:600;font-size:14px;margin:16px 0 6px}
.form input,.form textarea{
  width:100%;padding:12px 14px;border:1px solid var(--border);border-radius:var(--radius-sm);
  font-size:15px;font-family:inherit;background:#fff;color:var(--ink);
}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(10,132,255,.12)}
.form textarea{resize:vertical;min-height:110px}
.form .hint{font-size:12px;color:var(--soft);margin-top:4px}
.form .ok{display:none;margin-top:14px;padding:12px 16px;background:#e7f8ee;color:#16a34a;border-radius:10px;font-weight:600}

/* ---------- 页脚 ---------- */
.footer{background:#0b1220;color:#cbd5e1;padding:54px 0 30px;margin-top:30px}
.footer .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px}
.footer h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer a{color:#cbd5e1;font-size:14px;display:block;padding:5px 0}
.footer a:hover{color:#fff}
.footer .brand-f{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:18px;margin-bottom:12px}
.footer .brand-f img{width:32px;height:32px;border-radius:8px}
.footer .desc{font-size:14px;line-height:1.7;max-width:300px}
.footer .bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:34px;padding-top:20px;font-size:13px;color:#94a3b8;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}
.footer .bottom a{display:inline;padding:0;margin-left:16px}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .grid.cols-4,.grid.cols-3,.grid.cols-2{grid-template-columns:1fr}
  .footer .cols{grid-template-columns:1fr 1fr}
  .hero h1{font-size:34px}
  .hero p{font-size:16px}
  .cta-box{padding:34px 22px}
}
@media (max-width:680px){
  .nav-links{
    position:absolute;top:64px;left:0;right:0;background:#fff;border-bottom:1px solid var(--border);
    flex-direction:column;align-items:stretch;gap:0;padding:8px 20px 16px;display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 0;border-bottom:1px solid var(--border)}
  .nav-links a.cta{margin-top:10px;text-align:center}
  .nav-toggle{display:block}
  .footer .cols{grid-template-columns:1fr}
  .section-head h2{font-size:27px}
}