:root{
  --blue:#2f7de1; --blue-dark:#1f5fb0; --ink:#1f2733; --muted:#6b7686;
  --bg:#ffffff; --soft:#f5f8fc; --line:#e6ecf3; --accent:#ff7a18;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);line-height:1.7;background:var(--bg)}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{width:100%;max-width:1180px;margin:0 auto;padding:0 20px}

/* header */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(6px);border-bottom:1px solid var(--line)}
.header .container{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{font-weight:800;font-size:20px;color:var(--blue)}
.logo span{color:var(--accent)}
.nav{display:flex;gap:6px;align-items:center}
.nav a{padding:8px 12px;border-radius:8px;font-size:15px;color:var(--ink)}
.nav a:hover{background:var(--soft);color:var(--blue)}
.nav .btn{padding:8px 16px}
.nav-toggle{display:none}
.navToggleLabel{display:none;font-size:26px;cursor:pointer;user-select:none}

/* buttons */
.btn{display:inline-block;background:var(--blue);color:#fff;padding:12px 22px;border-radius:10px;font-weight:600;transition:.2s;border:none;cursor:pointer;font-size:15px}
.btn:hover{background:var(--blue-dark)}
.btn-accent{background:var(--accent)}
.btn-accent:hover{background:#e96a08}
.btn-ghost{background:#fff;color:var(--blue);border:1px solid var(--blue)}
.btn-ghost:hover{background:var(--soft)}

/* hero */
.hero{background:linear-gradient(135deg,#eaf2fe,#f7faff);padding:64px 0}
.hero h1{font-size:38px;line-height:1.25;margin-bottom:16px}
.hero p.lead{font-size:18px;color:var(--muted);max-width:700px;margin-bottom:26px}
.hero .cta{display:flex;gap:14px;flex-wrap:wrap}
.trustbar{display:flex;gap:30px;flex-wrap:wrap;margin-top:34px;color:var(--muted);font-size:14px}
.trustbar b{color:var(--blue);font-size:22px;display:block}

/* sections */
section{padding:60px 0}
.section-head{text-align:center;margin-bottom:36px}
.section-head h2{font-size:30px;margin-bottom:10px}
.section-head p{color:var(--muted)}

/* grid cards */
.grid{display:grid;gap:22px}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;transition:.2s}
.card:hover{box-shadow:0 8px 24px rgba(31,39,51,.08);transform:translateY(-3px)}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--muted);font-size:15px}
.card .ic{width:46px;height:46px;border-radius:12px;background:var(--soft);color:var(--blue);display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:14px}
.card a.more{color:var(--blue);font-weight:600;font-size:14px;margin-top:12px;display:inline-block}

/* process */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.step{text-align:center}
.step .num{width:42px;height:42px;border-radius:50%;background:var(--blue);color:#fff;display:flex;align-items:center;justify-content:center;margin:0 auto 12px;font-weight:700}
.step h4{font-size:16px;margin-bottom:6px}
.step p{color:var(--muted);font-size:13px}

/* pricing */
.price{background:#fff;border:1px solid var(--line);border-radius:16px;padding:28px;text-align:center;position:relative;display:flex;flex-direction:column}
.price.pop{border:2px solid var(--blue);box-shadow:0 10px 30px rgba(47,125,225,.15)}
.price .tag{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--accent);color:#fff;font-size:12px;padding:4px 12px;border-radius:20px;white-space:nowrap}
.price h3{font-size:20px}
.price .p{font-size:30px;color:var(--blue);font-weight:800;margin:12px 0}
.price .p small{font-size:14px;color:var(--muted);font-weight:400}
.price ul{list-style:none;text-align:left;margin:14px 0 20px;color:var(--muted);font-size:14px;flex:1}
.price li{padding:6px 0;border-bottom:1px dashed var(--line)}

/* cases */
.case{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.case .thumb{height:160px;background:linear-gradient(135deg,#dbeafe,#eef4ff);display:flex;align-items:center;justify-content:center;color:var(--blue);font-size:14px;text-align:center;padding:10px}
.case .body{padding:18px}
.case .body h4{font-size:16px;margin-bottom:6px}
.case .body p{color:var(--muted);font-size:14px}

/* contact */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:30px}
.contact .info p{margin:10px 0;color:var(--muted)}
.contact .info b{color:var(--ink)}
.qr{width:160px;height:160px;border:2px dashed var(--blue);border-radius:12px;display:flex;align-items:center;justify-content:center;color:var(--blue);text-align:center;font-size:13px;margin-top:10px;padding:10px}
/* 真实微信二维码卡片 */
.qr-box{margin:18px auto 0;background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 16px 14px;text-align:center;box-shadow:0 4px 14px rgba(20,40,80,.06);max-width:240px}
.qr-box .qr-cap{font-weight:700;color:var(--ink);margin-bottom:12px;font-size:15px}
.qr-box img{width:180px;height:180px;object-fit:contain;border-radius:10px;display:block;margin:0 auto}
.qr-box .qr-id{margin-top:12px;color:var(--blue);font-weight:600;font-size:14px}
form .field{margin-bottom:14px}
form input,form textarea{width:100%;padding:12px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit}
form textarea{height:110px;resize:vertical}

/* faq */
.faq details{border:1px solid var(--line);border-radius:10px;padding:14px 18px;margin-bottom:12px;background:#fff}
.faq summary{font-weight:600;cursor:pointer}
.faq p{color:var(--muted);margin-top:8px;font-size:15px}

/* footer */
.footer{background:#11203a;color:#cdd6e4;padding:36px 0;font-size:14px}
.footer a{color:#cdd6e4}
.footer .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:20px}
.footer .copy{width:100%;border-top:1px solid #24364f;margin-top:20px;padding-top:16px;color:#8b97a8;font-size:13px}

.subcta{text-align:center}
.subcta h2{font-size:28px;margin-bottom:12px}
.subcta p{color:var(--muted);margin-bottom:22px}
.chips{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-bottom:8px}
.chips span{background:var(--soft);color:var(--blue);padding:6px 14px;border-radius:20px;font-size:14px}

/* responsive */
@media(max-width:900px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
  .steps{grid-template-columns:repeat(2,1fr)}
  .contact{grid-template-columns:1fr}
}
@media(max-width:768px){
  .navToggleLabel{display:block}
  .nav{position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:10px 20px 20px;gap:4px;border-bottom:1px solid var(--line);display:none}
  .nav-toggle:checked ~ .nav{display:flex}
  .hero h1{font-size:28px}
  .hero p.lead{font-size:16px}
  .grid-4{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .section-head h2{font-size:24px}
}