:root{
  --orange:#FF7A2F;
  --orange-2:#FF5E3A;
  --blue:#14224A;
  --blue-2:#1E3A6E;
  --blue-3:#2E5BA8;
  --ink:#16213A;
  --muted:#5B6678;
  --bg:#FFFFFF;
  --bg-soft:#F4F7FB;
  --border:#E3E9F2;
  --grad-orange:linear-gradient(135deg,#FF8A3D 0%,#FF5E3A 100%);
  --grad-blue:linear-gradient(135deg,#1E3A6E 0%,#14224A 100%);
  --shadow:0 10px 30px rgba(20,34,74,.08);
  --shadow-lg:0 20px 50px rgba(20,34,74,.14);
  --radius:16px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- header / nav ---------- */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.93);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:800;font-size:20px;color:var(--blue)}
.logo .mark{width:32px;height:32px;border-radius:9px;background:var(--grad-orange);display:flex;align-items:center;justify-content:center;color:#fff;font-size:17px;font-weight:800}
.logo-img{height:46px;width:auto;object-fit:contain}
.site-footer .logo-img{height:56px}
.nav-links{display:flex;gap:26px;list-style:none}
.nav-links a{font-size:15px;color:var(--muted);font-weight:600;transition:color .2s;white-space:nowrap}
.nav-links a:hover,.nav-links a.active{color:var(--orange)}
.nav-cta{display:flex;align-items:center;gap:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 22px;border-radius:999px;font-weight:700;font-size:15px;cursor:pointer;border:0;transition:transform .15s,box-shadow .2s;font-family:inherit}
.btn-primary{background:var(--grad-orange);color:#fff;box-shadow:0 8px 20px rgba(255,94,58,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(255,94,58,.45)}
.btn-ghost{background:transparent;color:var(--blue);border:1.5px solid var(--border)}
.btn-ghost:hover{border-color:var(--orange);color:var(--orange)}
.btn-lg{padding:15px 34px;font-size:17px}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.burger span{width:24px;height:2.5px;background:var(--ink);border-radius:2px}

/* ---------- hero ---------- */
.hero{background:var(--grad-blue);color:#fff;padding:92px 0 108px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-8%;top:-25%;width:520px;height:520px;background:radial-gradient(circle,rgba(255,122,47,.28),transparent 60%);border-radius:50%}
.hero-inner{position:relative;z-index:1;max-width:780px}
.hero .eyebrow{display:inline-block;font-size:13px;letter-spacing:.14em;color:#FFB38A;font-weight:700;text-transform:uppercase;margin-bottom:18px}
.hero h1{font-size:46px;line-height:1.28;font-weight:800;margin-bottom:22px}
.hero h1 .hl{color:#FF9A5A}
.hero p.lead{font-size:18px;color:#C9D4E8;margin-bottom:34px;max-width:640px}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap}
.hero .btn-ghost{color:#fff;border-color:rgba(255,255,255,.32)}
.hero .btn-ghost:hover{border-color:var(--orange);color:var(--orange)}
.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:60px;position:relative;z-index:1}
.stat{text-align:center;padding:26px 16px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius)}
.stat .num{font-size:38px;font-weight:800;color:#FF9A5A}
.stat .label{color:#C9D4E8;font-size:13.5px;margin-top:6px}

/* ---------- section ---------- */
.section{padding:84px 0}
.section.alt{background:var(--bg-soft)}
.section-head{text-align:center;max-width:700px;margin:0 auto 52px}
.section-head .kicker{color:var(--orange);font-weight:700;font-size:14px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:12px;display:block}
.section-head h2{font-size:34px;font-weight:800;color:var(--blue);line-height:1.32}
.section-head p{margin-top:14px;color:var(--muted);font-size:16px}

/* ---------- grid / card ---------- */
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow);transition:transform .2s,box-shadow .2s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.card .ic{width:56px;height:56px;border-radius:14px;background:linear-gradient(135deg,rgba(255,122,47,.14),rgba(255,94,58,.08));color:var(--orange);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.card .ic svg{width:26px;height:26px}
.card h3{font-size:19px;color:var(--blue);margin-bottom:10px}
.card p{color:var(--muted);font-size:15px}
.card .more{display:inline-block;margin-top:14px;color:var(--orange);font-weight:700;font-size:14px}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.step{display:flex;gap:18px;padding:24px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.step .no{flex:0 0 44px;height:44px;border-radius:50%;background:var(--grad-blue);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px}
.step h3{color:var(--blue);font-size:17px;margin-bottom:6px}
.step p{color:var(--muted);font-size:14.5px}

/* ---------- compare ---------- */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.compare .col{border-radius:var(--radius);padding:30px;border:1px solid var(--border)}
.compare .col.bad{background:#FFF6F2;border-color:#FFD8C7}
.compare .col.good{background:#F1F7FF;border-color:#C9DEF7}
.compare h3{margin-bottom:16px;font-size:20px;color:var(--blue)}
.compare ul{list-style:none;display:flex;flex-direction:column;gap:12px}
.compare li{display:flex;gap:10px;font-size:15px;color:var(--muted);align-items:flex-start}
.compare li .mk{flex:0 0 auto;font-weight:800}
.compare li .x{color:#E2553B}
.compare li .v{color:#1E7A4D}

/* ---------- flow (业务链路) ---------- */
.flow{display:flex;align-items:stretch;gap:0;flex-wrap:wrap;justify-content:center}
.flow .node{flex:1;min-width:170px;max-width:260px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:24px 20px;text-align:center}
.flow .node .role{font-size:12.5px;color:var(--orange);font-weight:700;letter-spacing:.06em;text-transform:uppercase}
.flow .node h4{color:var(--blue);margin:8px 0 6px;font-size:18px}
.flow .node p{font-size:13.5px;color:var(--muted)}
.flow .arrow{display:flex;align-items:center;color:var(--blue-3);font-size:26px;padding:0 8px}

/* ---------- cta band ---------- */
.cta-band{background:var(--grad-orange);border-radius:24px;padding:56px 40px;text-align:center;color:#fff;box-shadow:var(--shadow-lg)}
.cta-band h2{font-size:30px;margin-bottom:14px}
.cta-band p{opacity:.94;margin-bottom:26px;font-size:16px}
.cta-band .btn-ghost{color:#fff;border-color:rgba(255,255,255,.55)}
.cta-band .btn-ghost:hover{background:rgba(255,255,255,.12);color:#fff}

/* ---------- notice / badge ---------- */
.notice{background:#FFF8EF;border:1px dashed #FFB47A;border-radius:12px;padding:15px 18px;font-size:13.5px;color:#8A5A2B;margin-top:22px;line-height:1.6}
.badge{display:inline-block;padding:4px 12px;border-radius:999px;font-size:12px;font-weight:700;margin-right:6px}
.badge.ok{background:rgba(30,122,77,.12);color:#1E7A4D}
.badge.warn{background:rgba(255,122,47,.14);color:#C2541F}
.badge.info{background:rgba(46,91,168,.12);color:#2E5BA8}

/* ---------- forms ---------- */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
.field label{font-size:14px;color:var(--blue);font-weight:600}
.field input,.field select,.field textarea{padding:12px 14px;border:1px solid var(--border);border-radius:10px;font-size:15px;font-family:inherit;background:#fff;color:var(--ink)}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--orange);box-shadow:0 0 0 3px rgba(255,122,47,.15)}
.form-note{font-size:13px;color:var(--muted);margin-top:14px}
.form-tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:26px}
.tab{padding:9px 18px;border-radius:999px;border:1.5px solid var(--border);background:#fff;color:var(--muted);font-weight:700;font-size:14px;cursor:pointer}
.tab.active{background:var(--grad-blue);color:#fff;border-color:transparent}

/* ---------- footer ---------- */
.site-footer{background:var(--grad-blue);color:#C9D4E8;padding:56px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px}
.site-footer .logo{color:#fff;margin-bottom:14px}
.site-footer p.desc{font-size:14px;max-width:300px;color:#A9B6D0}
.site-footer h4{color:#fff;font-size:16px;margin-bottom:16px}
.site-footer a{color:#C9D4E8;font-size:14px;display:block;margin-bottom:10px}
.site-footer a:hover{color:var(--orange)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);margin-top:36px;padding-top:20px;font-size:13px;color:#8C9AB5;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* ---------- responsive ---------- */
@media (max-width:900px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .nav-links{position:fixed;top:68px;left:0;right:0;background:#fff;flex-direction:column;padding:18px 24px;gap:14px;border-bottom:1px solid var(--border);transform:translateY(-130%);transition:transform .25s;box-shadow:var(--shadow)}
  .nav-links.open{transform:translateY(0)}
  .burger{display:flex}
  .nav-cta .btn-ghost{display:none}
  .hero h1{font-size:33px}
  .grid-2,.grid-3,.grid-4,.compare,.form-grid,.steps{grid-template-columns:1fr}
  .flow{flex-direction:column;align-items:center}
  .flow .arrow{transform:rotate(90deg);padding:6px 0}
  .stats{grid-template-columns:1fr}
  .section-head h2{font-size:26px}
  .section{padding:60px 0}
}