/* ===== Reset & Base ===== */
*{margin:0;padding:0;box-sizing:border-box}
:root{
  --primary:#4f46e5;--primary-dark:#4338ca;--accent:#ec4899;
  --bg:#f8fafc;--text:#1e293b;--muted:#64748b;--border:#e2e8f0;
  --radius:14px;--shadow:0 10px 30px rgba(79,70,229,.08);
}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:var(--text);background:#fff;line-height:1.7;font-size:15px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ===== Buttons ===== */
.btn{display:inline-block;padding:12px 28px;border-radius:50px;font-weight:600;transition:.25s;cursor:pointer;border:none;font-size:15px}
.btn-primary{background:linear-gradient(135deg,var(--primary),#7c3aed);color:#fff;box-shadow:0 8px 20px rgba(79,70,229,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(79,70,229,.4)}
.btn-ghost{background:#fff;color:var(--primary);border:1.5px solid var(--primary)}
.btn-ghost:hover{background:var(--primary);color:#fff}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px}
.logo-mark{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:grid;place-items:center;font-size:20px;font-weight:800}
.nav-menu{display:flex;align-items:center;gap:6px}
.nav-menu a{padding:8px 16px;border-radius:8px;font-weight:500;color:var(--text);transition:.2s}
.nav-menu a:hover{color:var(--primary);background:#eef2ff}
.nav-menu a.active{color:var(--primary);background:#eef2ff}
.nav-cta{background:linear-gradient(135deg,var(--primary),#7c3aed);color:#fff!important}
.nav-cta:hover{color:#fff!important;transform:translateY(-1px)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:cursor:pointer;padding:6px}
.nav-toggle span{width:24px;height:2px;background:var(--text);transition:.3s}

/* ===== Hero ===== */
.hero{position:relative;padding:90px 0 100px;background:radial-gradient(circle at 20% 20%,#ede9fe,transparent 50%),radial-gradient(circle at 80% 30%,#fce7f3,transparent 50%),linear-gradient(180deg,#fafbff,#fff);overflow:hidden}
.hero-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:50px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--border);padding:6px 16px;border-radius:50px;font-size:13px;color:var(--muted);margin-bottom:22px;box-shadow:var(--shadow)}
.hero-badge b{color:var(--primary)}
.hero h1{font-size:46px;line-height:1.25;margin-bottom:20px;font-weight:800}
.hero h1 .grad{background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:17px;color:var(--muted);margin-bottom:32px;max-width:560px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-visual{position:relative}
.hero-card{background:#fff;border-radius:20px;padding:28px;box-shadow:0 25px 60px rgba(79,70,229,.15);border:1px solid var(--border)}
.hero-card h3{font-size:16px;margin-bottom:18px;display:flex;align-items:center;gap:8px}
.phone-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.phone{aspect-ratio:9/16;background:linear-gradient(160deg,#1e293b,#334155);border-radius:8px;position:relative;overflow:hidden}
.phone::after{content:"";position:absolute;top:6px;left:50%;transform:translateX(-50%);width:18px;height:4px;background:#0f172a;border-radius:2px}
.phone-screen{position:absolute;inset:10px 6px 6px;border-radius:4px;background:linear-gradient(135deg,var(--primary),var(--accent));opacity:.85}
.stat-row{display:flex;justify-content:space-around;margin-top:22px;padding-top:18px;border-top:1px solid var(--border)}
.stat-row .num{font-size:24px;font-weight:800;color:var(--primary)}
.stat-row .lbl{font-size:12px;color:var(--muted)}

/* ===== Sections ===== */
section{padding:80px 0}
.section-head{text-align:center;max-width:680px;margin:0 auto 50px}
.section-tag{display:inline-block;color:var(--primary);font-weight:600;font-size:14px;letter-spacing:1px;margin-bottom:12px}
.section-head h2{font-size:34px;font-weight:800;margin-bottom:14px}
.section-head p{color:var(--muted);font-size:16px}
.bg-soft{background:var(--bg)}

/* ===== Feature Cards ===== */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:30px;transition:.3s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:#c7d2fe}
.card .icon{width:54px;height:54px;border-radius:12px;display:grid;place-items:center;font-size:26px;margin-bottom:18px;background:linear-gradient(135deg,#eef2ff,#fce7f3)}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--muted);font-size:14px}

/* ===== Stats ===== */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat .num{font-size:42px;font-weight:800;background:linear-gradient(135deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .lbl{color:var(--muted);margin-top:6px}

/* ===== Steps ===== */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.step{position:relative;padding:30px 22px;background:#fff;border:1px solid var(--border);border-radius:var(--radius)}
.step::before{counter-increment:step;content:counter(step);position:absolute;top:-18px;left:22px;width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--accent));color:#fff;display:grid;place-items:center;font-weight:700;font-size:18px}
.step h3{margin:12px 0 8px;font-size:17px}
.step p{color:var(--muted);font-size:14px}

/* ===== Page banner ===== */
.page-banner{padding:70px 0 60px;background:linear-gradient(135deg,#4f46e5,#7c3aed);color:#fff;text-align:center}
.page-banner h1{font-size:38px;margin-bottom:12px}
.page-banner p{opacity:.9;font-size:17px}
.breadcrumb{margin-top:16px;font-size:14px;opacity:.85}
.breadcrumb a{opacity:.85}.breadcrumb a:hover{opacity:1;text-decoration:underline}

/* ===== Content ===== */
.content{max-width:900px;margin:0 auto;font-size:16px}
.content h2{font-size:26px;margin:36px 0 14px}
.content p{margin-bottom:16px;color:#334155}
.feature-list{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:20px 0}
.feature-list li{padding:14px 18px;background:var(--bg);border-radius:10px;border-left:3px solid var(--primary)}
.feature-list li b{display:block;margin-bottom:4px}
.feature-list li span{color:var(--muted);font-size:14px}

/* ===== Contact ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.contact-info .item{display:flex;gap:14px;padding:18px 0;border-bottom:1px solid var(--border)}
.contact-info .item .ic{width:44px;height:44px;border-radius:10px;background:#eef2ff;color:var(--primary);display:grid;place-items:center;font-size:20px;flex-shrink:0}
.contact-info .item h4{font-size:15px;color:var(--muted);font-weight:500}
.contact-info .item p{font-size:17px;font-weight:600}
.form-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow)}
.form-card label{display:block;margin:14px 0 6px;font-weight:500;font-size:14px}
.form-card input,.form-card textarea,.form-card select{width:100%;padding:11px 14px;border:1px solid var(--border);border-radius:8px;font-size:15px;font-family:inherit;transition:.2s}
.form-card input:focus,.form-card textarea:focus,.form-card select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #eef2ff}
.form-card .btn{margin-top:20px;width:100%}

/* ===== Logo cloud ===== */
.logo-cloud{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.logo-cloud .li{background:#fff;border:1px solid var(--border);border-radius:10px;padding:24px;text-align:center;color:var(--muted);font-weight:600;transition:.2s}
.logo-cloud .li:hover{color:var(--primary);border-color:#c7d2fe}

/* ===== CTA ===== */
.cta-band{background:linear-gradient(135deg,var(--primary),#7c3aed);color:#fff;border-radius:24px;padding:60px 40px;text-align:center;margin:0 auto;max-width:1100px}
.cta-band h2{font-size:32px;margin-bottom:14px}
.cta-band p{opacity:.92;margin-bottom:26px;font-size:17px}
.cta-band .btn-primary{background:#fff;color:var(--primary);box-shadow:none}

/* ===== Footer ===== */
.site-footer{background:#0f172a;color:#cbd5e1;padding:60px 0 0;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.4fr;gap:36px;padding-bottom:40px}
.footer-logo{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#fff;margin-bottom:14px}
.footer-desc{color:#94a3b8;font-size:14px;max-width:320px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:16px}
.footer-col ul li{margin-bottom:10px}
.footer-col a{color:#94a3b8;font-size:14px;transition:.2s}
.footer-col a:hover{color:#fff}
.contact-list li{color:#94a3b8;font-size:14px;margin-bottom:10px}
.footer-bottom{border-top:1px solid #1e293b;padding:18px 0}
.footer-bottom .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px;color:#64748b}

/* ===== Responsive ===== */
@media (max-width:960px){
  .hero-inner{grid-template-columns:1fr;gap:40px}
  .hero h1{font-size:34px}
  .grid-3,.grid-4,.steps,.stats,.contact-grid,.feature-list{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .logo-cloud{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:640px){
  .nav-toggle{display:flex}
  .nav-menu{position:absolute;top:68px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:14px 20px;gap:4px;border-bottom:1px solid var(--border);display:none;box-shadow:0 12px 20px rgba(0,0,0,.06)}
  body.nav-open .nav-menu{display:flex}
  .nav-menu a{padding:12px 14px}
  .nav-cta{text-align:center}
  .hero{padding:60px 0 70px}
  .hero h1{font-size:28px}
  section{padding:60px 0}
  .section-head h2{font-size:26px}
  .grid-3,.grid-4,.steps,.stats,.contact-grid,.feature-list,.footer-grid{grid-template-columns:1fr}
  .logo-cloud{grid-template-columns:repeat(2,1fr)}
  .cta-band{padding:40px 22px}
  .cta-band h2{font-size:24px}
}