:root{
  --brand:#0d6efd;--brand-dark:#0a4fc4;--ink:#141a26;--text:#2a3142;--muted:#78829a;
  --line:#e9edf5;--bg:#f7f9fd;--card:#fff;--radius:14px;
  --shadow:0 4px 24px rgba(20,40,80,.07);
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,sans-serif;
  color:var(--text);background:var(--bg);font-size:15px;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}

.nav{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{height:66px;display:flex;align-items:center;gap:26px}
.logo{font-size:18px;font-weight:700;color:var(--ink);letter-spacing:.5px;flex:none}
.logo span{color:var(--brand)}
.nav-links{display:flex;gap:24px;margin-left:auto;align-items:center}
.nav-links a{font-size:15px;color:var(--text);transition:color .15s}
.nav-links a:hover,.nav-links a.on{color:var(--brand)}
.nav-cta{background:var(--brand);color:#fff!important;padding:8px 18px;border-radius:8px;font-size:14px}
.nav-cta:hover{background:var(--brand-dark)}
.nav-toggle{display:none;margin-left:auto;font-size:22px;cursor:pointer;color:var(--ink);background:none;border:0}

.hero{padding:72px 0 64px;background:linear-gradient(135deg,#eef4ff 0%,#f9fbff 55%,#eaf1ff 100%)}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero-tag{display:inline-block;background:#fff;color:var(--brand);border:1px solid #d3e2ff;font-size:13px;
  padding:5px 14px;border-radius:20px;margin-bottom:18px}
.hero h1{font-size:40px;line-height:1.28;color:var(--ink);font-weight:800;letter-spacing:-.5px}
.hero h1 em{font-style:normal;color:var(--brand)}
.hero p{margin-top:18px;font-size:16px;color:#5a6376;max-width:520px}
.hero-btns{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 28px;border-radius:10px;
  font-size:15px;cursor:pointer;border:1px solid transparent;transition:.16s;font-family:inherit}
.btn-main{background:var(--brand);color:#fff;box-shadow:0 6px 18px rgba(13,110,253,.24)}
.btn-main:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn-ghost{background:#fff;color:var(--brand);border-color:#cadcff}
.btn-ghost:hover{border-color:var(--brand)}

.hero-visual{display:flex;justify-content:center}
.phone{width:270px;background:#fff;border-radius:26px;padding:16px;box-shadow:0 20px 50px rgba(20,40,80,.13);border:1px solid var(--line)}
.phone-bar{height:6px;width:56px;background:#e5eaf4;border-radius:4px;margin:0 auto 14px}
.pv-badge{background:#e8f8f0;color:#0e9f5b;border-radius:10px;padding:12px;text-align:center;font-weight:700;font-size:15px}
.pv-row{display:flex;justify-content:space-between;font-size:13px;padding:9px 0;border-bottom:1px dashed var(--line);color:var(--muted)}
.pv-row b{color:var(--text);font-weight:600}
.pv-warn{background:#fdecea;color:#d92d20;border-radius:8px;padding:9px 11px;font-size:12px;margin-top:12px;font-weight:600}

.sec{padding:76px 0}
.sec-head{text-align:center;margin-bottom:46px}
.sec-head h2{font-size:30px;color:var(--ink);font-weight:800;letter-spacing:-.3px}
.sec-head p{color:var(--muted);margin-top:10px;font-size:15px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feat{background:#fff;border-radius:var(--radius);padding:28px 24px;box-shadow:var(--shadow);transition:.2s;border:1px solid transparent}
.feat:hover{transform:translateY(-3px);border-color:#dce8ff}
.feat-ico{width:46px;height:46px;border-radius:12px;background:#eaf2ff;color:var(--brand);font-size:22px;
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;font-weight:700}
.feat h3{font-size:17px;color:var(--ink);margin-bottom:9px;font-weight:700}
.feat p{color:#66708a;font-size:14px}

.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;position:relative}
.step{background:#fff;border-radius:var(--radius);padding:26px 22px;box-shadow:var(--shadow);text-align:center;position:relative}
.step-n{width:38px;height:38px;border-radius:50%;background:var(--brand);color:#fff;font-weight:700;
  display:flex;align-items:center;justify-content:center;margin:0 auto 14px;font-size:16px}
.step h4{font-size:16px;color:var(--ink);margin-bottom:7px}
.step p{font-size:13.5px;color:#66708a}

.prod-card{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.2s}
.prod-card:hover{transform:translateY(-3px)}
.prod-img{height:172px;background:linear-gradient(135deg,#eaf2ff,#d8e6ff);display:flex;align-items:center;
  justify-content:center;font-size:44px;color:#8fb4f5}
.prod-body{padding:22px}
.prod-body h3{font-size:17px;color:var(--ink);margin-bottom:9px;font-weight:700}
.prod-body p{color:#66708a;font-size:14px}
.prod-body ul{margin-top:14px;padding-left:0;list-style:none}
.prod-body li{font-size:13.5px;color:#66708a;padding-left:18px;position:relative;margin-bottom:6px}
.prod-body li::before{content:"✓";position:absolute;left:0;color:var(--brand);font-weight:700}

.cta-band{background:linear-gradient(135deg,#0d6efd,#3b8cff);border-radius:20px;padding:52px 40px;text-align:center;color:#fff}
.cta-band h2{font-size:28px;font-weight:800;margin-bottom:12px}
.cta-band p{color:rgba(255,255,255,.85);margin-bottom:26px}
.cta-band .btn{background:#fff;color:var(--brand)}
.cta-band .btn:hover{background:#f0f6ff}

.article{background:#fff;border-radius:var(--radius);padding:44px 46px;box-shadow:var(--shadow)}
.article h2{font-size:24px;color:var(--ink);margin-bottom:18px;font-weight:800}
.article h3{font-size:17px;color:var(--ink);margin:26px 0 10px;font-weight:700}
.article p{color:#5a6376;margin-bottom:14px}
.article ul{margin:0 0 16px 20px;color:#5a6376}
.article li{margin-bottom:8px}

.ft{background:#141a26;color:rgba(255,255,255,.62);padding:46px 0 26px;font-size:14px}
.ft-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:34px;padding-bottom:28px;border-bottom:1px solid rgba(255,255,255,.1)}
.ft h4{color:#fff;font-size:16px;margin-bottom:14px;font-weight:700}
.ft a{display:block;margin-bottom:9px;color:rgba(255,255,255,.62);font-size:14px}
.ft a:hover{color:#fff}
.ft-copy{text-align:center;padding-top:22px;font-size:13px;color:rgba(255,255,255,.42);line-height:1.9}
.ft-copy a{display:inline;color:rgba(255,255,255,.42)}

@media (max-width:900px){
  .hero-inner{grid-template-columns:1fr;gap:36px}
  .hero h1{font-size:30px}
  .hero{padding:50px 0 44px}
  .grid3,.grid4,.flow{grid-template-columns:1fr 1fr}
  .ft-grid{grid-template-columns:1fr 1fr}
  .sec{padding:54px 0}
  .sec-head h2{font-size:24px}
  .article{padding:28px 22px}
}
@media (max-width:640px){
  .nav-inner{height:58px;gap:12px}
  .nav-toggle{display:block}
  .nav-links{position:absolute;top:58px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;
    gap:0;padding:8px 0;border-bottom:1px solid var(--line);box-shadow:0 12px 24px rgba(20,40,80,.08);display:none}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 20px}
  .nav-cta{border-radius:0;text-align:center}
  .hero h1{font-size:26px}
  .hero p{font-size:15px}
  .grid3,.grid4,.flow{grid-template-columns:1fr}
  .ft-grid{grid-template-columns:1fr}
  .cta-band{padding:36px 22px;border-radius:14px}
  .cta-band h2{font-size:21px}
  .phone{width:100%;max-width:290px}
}