:root{
  --navy:#0B1F3A;
  --navy-2:#102B4E;
  --primary:#3388FF;
  --primary-d:#1E6FE0;
  --accent:#FF8A00;
  --accent-d:#E6780A;
  --bg:#F6F8FC;
  --card:#FFFFFF;
  --text:#16202E;
  --muted:#5B6675;
  --line:#E4E9F2;
  --radius:14px;
  --shadow:0 8px 30px rgba(16,43,78,.08);
  --shadow-h:0 14px 40px rgba(51,136,255,.18);
  --maxw:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Microsoft YaHei","PingFang SC","Hiragino Sans GB",-apple-system,"Segoe UI",Roboto,sans-serif;
  color:var(--text);background:var(--bg);line-height:1.75;
  -webkit-font-smoothing:antialiased;font-size:15px;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
ul{list-style:none}

/* ---------- layout ---------- */
.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.section{padding:84px 0}
.section.alt{background:var(--card)}
.section-tight{padding:64px 0}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.82);
  backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--navy);letter-spacing:.5px}
.brand .logo{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--primary),var(--navy));
  display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:16px}
.brand small{font-size:11px;color:var(--muted);font-weight:600;letter-spacing:2px;display:block;margin-top:-3px}
.nav-menu{display:flex;align-items:center;gap:30px}
.nav-menu a{font-size:15px;color:var(--text);font-weight:600;transition:color .2s;position:relative}
.nav-menu a:hover{color:var(--primary)}
.nav-menu a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;background:var(--primary);transition:width .25s}
.nav-menu a:hover::after{width:100%}
.nav-cta{display:flex;align-items:center;gap:12px}
.hamburger{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:8px}
.hamburger span{width:24px;height:2px;background:var(--navy);border-radius:2px;transition:.3s}
.hamburger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:10px;font-weight:700;font-size:15px;cursor:pointer;
  border:1.5px solid transparent;transition:.22s;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--accent),var(--accent-d));color:#fff;box-shadow:0 8px 22px rgba(255,138,0,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(255,138,0,.38)}
.btn-ghost{background:transparent;border-color:var(--primary);color:var(--primary)}
.btn-ghost:hover{background:var(--primary);color:#fff}
.btn-light{background:#fff;color:var(--navy);border-color:#fff}
.btn-light:hover{background:rgba(255,255,255,.88)}
.btn-sm{padding:9px 18px;font-size:13.5px}

/* ---------- hero ---------- */
.hero{position:relative;background:radial-gradient(1200px 600px at 78% -10%,rgba(51,136,255,.35),transparent 60%),
  linear-gradient(160deg,var(--navy) 0%,var(--navy-2) 100%);color:#fff;overflow:hidden;padding:96px 0 104px}
.hero::after{content:"";position:absolute;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,138,0,.18),transparent 70%);top:-120px;left:-80px;filter:blur(10px)}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:54px;align-items:center;position:relative;z-index:2}
.hero .tag{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.1);
  border:1px solid rgba(255,255,255,.18);padding:7px 15px;border-radius:30px;font-size:13px;color:#cfe0ff;margin-bottom:22px}
.hero h1{font-size:42px;line-height:1.25;font-weight:800;letter-spacing:.5px;margin-bottom:20px}
.hero h1 .hl{color:var(--accent)}
.hero p.lead{font-size:17px;color:#d4e2f7;max-width:540px;margin-bottom:32px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-mock{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);border-radius:18px;
  padding:22px;backdrop-filter:blur(6px)}
.hero-mock .m-title{font-size:13px;color:#a9c5f0;margin-bottom:14px;letter-spacing:1px}
.m-row{margin-bottom:14px}
.m-row .m-label{display:flex;justify-content:space-between;font-size:13px;color:#cfe0ff;margin-bottom:6px}
.m-bar{height:8px;background:rgba(255,255,255,.12);border-radius:6px;overflow:hidden}
.m-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--primary),var(--accent));border-radius:6px}
.m-big{margin-top:6px;font-size:26px;font-weight:800;color:#fff}
.m-big span{color:var(--accent)}

/* ---------- stats ---------- */
.stats{background:var(--navy);color:#fff;padding:42px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat .num{font-size:38px;font-weight:800;color:#fff}
.stat .num span{color:var(--accent)}
.stat .lbl{font-size:14px;color:#9fb6d6;margin-top:6px}
.stat .note{font-size:11px;color:#6f87a8;margin-top:3px}

/* ---------- section title ---------- */
.sec-head{text-align:center;max-width:760px;margin:0 auto 52px}
.sec-head .ey{color:var(--primary);font-weight:700;letter-spacing:3px;font-size:13px;text-transform:uppercase;margin-bottom:12px;display:block}
.sec-head h2{font-size:32px;font-weight:800;color:var(--navy);line-height:1.3}
.sec-head p{color:var(--muted);margin-top:14px;font-size:16px}

/* ---------- pain ---------- */
.pain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.pain{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.pain .ic{width:46px;height:46px;border-radius:12px;background:rgba(255,138,0,.12);color:var(--accent);
  display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:16px}
.pain h3{font-size:18px;color:var(--navy);margin-bottom:10px}
.pain p{color:var(--muted);font-size:14.5px}

/* ---------- feature cards ---------- */
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.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:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;
  box-shadow:var(--shadow);transition:.25s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-h);border-color:rgba(51,136,255,.4)}
.card .ic{width:50px;height:50px;border-radius:13px;background:linear-gradient(135deg,var(--primary),var(--navy));
  color:#fff;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:18px}
.card h3{font-size:18px;color:var(--navy);margin-bottom:10px}
.card p{color:var(--muted);font-size:14.5px}
.card .k{color:var(--accent);font-weight:700}

/* ---------- tools ---------- */
.tool{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px 22px;
  box-shadow:var(--shadow);transition:.25s}
.tool:hover{transform:translateY(-4px);border-color:var(--primary)}
.tool .tno{font-size:13px;font-weight:800;color:var(--primary);letter-spacing:1px}
.tool h3{font-size:17px;color:var(--navy);margin:8px 0 8px}
.tool p{color:var(--muted);font-size:14px}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.step{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 24px 26px;box-shadow:var(--shadow)}
.step .n{counter-increment:step;width:42px;height:42px;border-radius:50%;
  background:linear-gradient(135deg,var(--primary),var(--navy));color:#fff;font-weight:800;
  display:flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:16px}
.step .n::before{content:counter(step)}
.step h3{font-size:17px;color:var(--navy);margin-bottom:8px}
.step p{color:var(--muted);font-size:14px}

/* ---------- risk / trust ---------- */
.risk{background:linear-gradient(135deg,#fff,#f3f7ff);border:1px solid var(--line);border-left:4px solid var(--primary);
  border-radius:var(--radius);padding:26px 28px;box-shadow:var(--shadow)}
.risk h3{color:var(--navy);font-size:18px;margin-bottom:14px;display:flex;align-items:center;gap:10px}
.risk ul li{position:relative;padding-left:24px;margin-bottom:10px;color:var(--text);font-size:14.5px}
.risk ul li::before{content:"✓";position:absolute;left:0;top:0;color:var(--primary);font-weight:800}
.badges{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:8px}
.badge{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-align:center;box-shadow:var(--shadow)}
.badge .bi{width:44px;height:44px;border-radius:11px;background:rgba(51,136,255,.12);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:22px;margin:0 auto 12px}
.badge h4{font-size:15px;color:var(--navy);margin-bottom:6px}
.badge p{font-size:13px;color:var(--muted)}

/* ---------- form ---------- */
.form-wrap{background:linear-gradient(160deg,var(--navy),var(--navy-2));border-radius:20px;padding:46px;color:#fff;
  display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center}
.form-wrap h2{font-size:28px;font-weight:800;margin-bottom:14px}
.form-wrap p{color:#cfe0f7;margin-bottom:22px}
.form{display:grid;gap:14px}
.form input,.form select,.form textarea{width:100%;padding:13px 15px;border-radius:10px;border:1px solid rgba(255,255,255,.2);
  background:rgba(255,255,255,.08);color:#fff;font-size:14.5px;font-family:inherit}
.form input::placeholder,.form textarea::placeholder{color:#9fb6d6}
.form select option{color:#16202e}
.form .btn-primary{width:100%;margin-top:4px}
.form .hint{font-size:12px;color:#9fb6d6}
.ok-msg{display:none;background:rgba(46,204,113,.15);border:1px solid rgba(46,204,113,.4);
  color:#9ff0c0;padding:14px;border-radius:10px;font-size:14px;margin-top:8px}
.ok-msg.show{display:block}

/* ---------- cta band ---------- */
.cta-band{background:linear-gradient(135deg,var(--primary),var(--navy));color:#fff;text-align:center;padding:60px 0}
.cta-band h2{font-size:30px;font-weight:800;margin-bottom:14px}
.cta-band p{color:#d4e2f7;margin-bottom:26px;font-size:16px}

/* ---------- footer ---------- */
.footer{background:var(--navy);color:#aebfd8;padding:58px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:36px}
.footer .brand{color:#fff;margin-bottom:16px}
.footer p.desc{font-size:14px;line-height:1.8;max-width:320px}
.footer h4{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:1px}
.footer ul li{margin-bottom:10px;font-size:14px}
.footer ul li a:hover{color:var(--accent)}
.footer .contact-item{display:flex;gap:10px;font-size:14px;margin-bottom:12px;align-items:flex-start}
.footer .contact-item .ci{color:var(--accent)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:40px;padding-top:22px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;font-size:13px;color:#7e93b5}
.footer-bottom a:hover{color:var(--accent)}

/* ---------- placeholder (upload later) ---------- */
.ph{border:2px dashed #b9c6dd;border-radius:12px;background:repeating-linear-gradient(45deg,#f4f8ff,#f4f8ff 12px,#eaf1fb 12px,#eaf1fb 24px);
  display:flex;flex-direction:column;align-items:center;justify-content:center;color:#6c7d9c;
  font-size:13px;text-align:center;padding:14px;min-height:120px;position:relative}
.ph .ph-ic{font-size:26px;margin-bottom:6px;opacity:.6}
.ph .ph-tag{position:absolute;top:8px;left:8px;background:var(--accent);color:#fff;font-size:11px;
  padding:3px 9px;border-radius:20px;font-weight:700}
.ph.ph-lg{min-height:240px}
.ph.ph-sm{min-height:90px}

/* ---------- reveal animation ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media(max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:38px}
  .hero h1{font-size:34px}
  .grid-4,.badges,.stats-grid,.steps{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .form-wrap{grid-template-columns:1fr;padding:34px}
}
@media(max-width:760px){
  .nav-menu{position:fixed;top:66px;left:0;right:0;background:#fff;flex-direction:column;gap:0;
    padding:10px 22px 22px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);
    transform:translateY(-130%);transition:.3s;z-index:49}
  .nav-menu.open{transform:translateY(0)}
  .nav-menu a{padding:14px 0;width:100%;border-bottom:1px solid var(--line)}
  .nav-menu a::after{display:none}
  .hamburger{display:flex}
  .nav-cta .btn-ghost{display:none}
  .grid-2,.grid-3,.grid-4,.pain-grid,.badges,.stats-grid,.steps,.footer-grid{grid-template-columns:1fr}
  .hero{padding:64px 0 72px}
  .hero h1{font-size:28px}
  .sec-head h2{font-size:25px}
  .section{padding:60px 0}
}