:root{
  --bg:#f6f7fb;
  --surface:#ffffff;
  --surface-2:#f3f6ff;
  --ink:#142033;
  --muted:#5e6b84;
  --line:#dbe3f2;
  --brand:#ff4d6d;
  --brand2:#2f6bff;
  --brand3:#00c2a8;
  --shadow:0 18px 50px rgba(28, 48, 90, .12);
  --radius:22px;
  --radius-sm:14px;
  --container:1160px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);
  background:
    radial-gradient(circle at top left, rgba(255,77,109,.12), transparent 28%),
    radial-gradient(circle at top right, rgba(47,107,255,.12), transparent 25%),
    linear-gradient(180deg,#f8faff 0%, #f6f7fb 45%, #f7f9fd 100%);
}
a{color:var(--brand2);text-decoration:none}
img{display:block;max-width:100%}
.container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
header,main,footer{position:relative}
.section{padding:72px 0}
.section.alt{background:linear-gradient(180deg, rgba(255,255,255,.65), rgba(243,246,255,.7))}
.topbar{
  position:sticky;top:0;z-index:50;
  backdrop-filter:blur(16px);
  background:rgba(246,247,251,.82);
  border-bottom:1px solid rgba(219,227,242,.9);
}
.nav{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  min-height:74px;
}
.brand{
  display:flex;align-items:center;gap:12px;min-width:0;
  color:var(--ink);
}
.brand img{width:42px;height:42px;object-fit:contain}
.brand strong{display:block;font-size:18px;line-height:1.1}
.brand span{display:block;font-size:12px;color:var(--muted);margin-top:3px}
.nav-links{display:flex;align-items:center;gap:18px;flex-wrap:wrap;justify-content:flex-end}
.nav-links a{color:var(--ink);font-size:14px;font-weight:600;opacity:.86}
.nav-links a:hover{color:var(--brand2)}
.nav-cta{display:flex;align-items:center;gap:10px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:999px;
  padding:12px 18px;font-weight:700;font-size:14px;
  transition:transform .22s ease, box-shadow .22s ease, background .22s ease, border-color .22s ease;
  cursor:pointer;white-space:nowrap;
}
.btn:hover{transform:translateY(-2px);box-shadow:var(--shadow)}
.btn.primary{background:linear-gradient(135deg,var(--brand),#ff7a45); color:#fff}
.btn.secondary{background:#fff;border-color:var(--line);color:var(--ink)}
.btn.ghost{background:rgba(47,107,255,.08);color:var(--brand2);border-color:rgba(47,107,255,.15)}
.menu-btn{
  display:none;background:#fff;border:1px solid var(--line);border-radius:14px;
  width:46px;height:46px;align-items:center;justify-content:center;cursor:pointer;
}
.menu-btn span{display:block;width:18px;height:2px;background:var(--ink);position:relative}
.menu-btn span:before,.menu-btn span:after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink)}
.menu-btn span:before{top:-6px}.menu-btn span:after{top:6px}
.hero{
  padding:34px 0 20px;
}
.hero-grid{
  display:grid;grid-template-columns:1.25fr .75fr;gap:22px;align-items:stretch;
}
.hero-panel,.hero-side,.card,.panel,.faq-item,.quote,.contact-box,.table-wrap,.timeline,.article-card,.review-card,.case-card,.step{
  background:rgba(255,255,255,.86);
  border:1px solid rgba(219,227,242,.95);
  border-radius:var(--radius);
  box-shadow:0 12px 35px rgba(25,45,82,.08);
}
.hero-panel{padding:34px}
.kicker{
  display:inline-flex;align-items:center;gap:8px;
  padding:8px 12px;border-radius:999px;background:rgba(255,77,109,.1);color:#b71d39;
  font-size:13px;font-weight:700;
}
h1{margin:16px 0 12px;font-size:clamp(32px,4vw,54px);line-height:1.06;letter-spacing:-.03em}
.lead{margin:0;color:var(--muted);font-size:16px;line-height:1.8;max-width:58ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.hero-points{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:26px}
.point{
  padding:14px 14px 12px;border-radius:18px;background:linear-gradient(180deg,#fff,#f7f9ff);
  border:1px solid var(--line)
}
.point strong{display:block;font-size:18px}
.point span{display:block;color:var(--muted);font-size:13px;margin-top:4px;line-height:1.5}
.hero-side{padding:24px;background:
  linear-gradient(180deg, rgba(47,107,255,.08), rgba(255,255,255,.86)),
  rgba(255,255,255,.86);
}
.side-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.badge{padding:7px 10px;border-radius:999px;background:#fff;border:1px solid var(--line);font-size:12px;font-weight:700;color:var(--brand2)}
.side-list{display:grid;gap:10px;margin-top:16px}
.side-list .item{
  padding:14px 14px;border-radius:16px;background:#fff;border:1px solid var(--line)
}
.item b{display:block;margin-bottom:4px}
.item p{margin:0;color:var(--muted);font-size:13px;line-height:1.6}
.metrics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.metric{padding:20px}
.metric .num{font-size:28px;font-weight:800;letter-spacing:-.03em}
.metric .cap{color:var(--muted);font-size:13px;line-height:1.5;margin-top:6px}
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px}
.card,.panel,.case-card,.review-card,.article-card,.quote,.step,.contact-box{padding:22px}
.card h3,.panel h3,.case-card h3,.review-card h3,.article-card h3,.contact-box h3,.quote h3{margin:0 0 10px;font-size:18px}
.card p,.panel p,.case-card p,.review-card p,.article-card p,.contact-box p,.quote p{margin:0;color:var(--muted);line-height:1.75}
.icon-dot{
  width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,rgba(255,77,109,.14),rgba(47,107,255,.14));
  display:inline-flex;align-items:center;justify-content:center;font-size:18px;margin-bottom:12px
}
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
.tag{
  padding:9px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--ink);
  font-size:13px;font-weight:600
}
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}
.step .no{font-size:13px;color:#b71d39;font-weight:800}
.step h3{margin-top:10px}
.table-wrap{overflow:auto}
table{width:100%;border-collapse:collapse;min-width:860px}
th,td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;font-size:14px}
th{background:#f7f9ff;color:var(--ink)}
tr:hover td{background:rgba(47,107,255,.03)}
.faqs{display:grid;gap:12px}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 20px;font-weight:700;display:flex;align-items:center;justify-content:space-between;gap:12px
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:after{content:"+";font-size:22px;color:var(--brand2);line-height:1}
.faq-item[open] summary:after{content:"−"}
.faq-item .answer{padding:0 20px 18px;color:var(--muted);line-height:1.8}
.reviews,.cases,.articles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
.stars{color:#ff9a1f;font-size:14px;letter-spacing:1px}
.quote{background:linear-gradient(180deg,#fff,#f7fbff)}
.quote strong{display:block;margin-top:12px}
.form{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px
}
.form .full{grid-column:1/-1}
input,select,textarea{
  width:100%;border:1px solid var(--line);border-radius:14px;background:#fff;color:var(--ink);
  padding:13px 14px;font:inherit;outline:none;transition:border-color .2s ease, box-shadow .2s ease
}
input:focus,select:focus,textarea:focus{border-color:rgba(47,107,255,.5);box-shadow:0 0 0 4px rgba(47,107,255,.1)}
textarea{min-height:120px;resize:vertical}
.contact-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:16px;align-items:start}
.kefu{display:grid;grid-template-columns:120px 1fr;gap:16px;align-items:center}
.kefu img{width:120px;height:120px;object-fit:cover;border-radius:18px;border:1px solid var(--line);background:#fff}
.footer{
  padding:28px 0 34px;background:linear-gradient(180deg,#eef2ff,#e9efff);
  color:var(--ink);border-top:1px solid rgba(219,227,242,.9)
}
.footer a{color:#2347d8}
.footer-grid{display:grid;grid-template-columns:1.2fr .8fr;gap:20px;align-items:start}
.small{font-size:13px;color:var(--muted);line-height:1.8}
.foot-links{display:flex;flex-wrap:wrap;gap:12px}
.fab{
  position:fixed;right:18px;bottom:18px;z-index:60;display:grid;gap:10px
}
.fab a,.fab button{
  width:52px;height:52px;border-radius:50%;border:none;display:flex;align-items:center;justify-content:center;
  box-shadow:var(--shadow);background:#fff;color:var(--ink);cursor:pointer
}
.fab .primary{background:linear-gradient(135deg,var(--brand2),#58a6ff);color:#fff}
.reveal{opacity:0;transform:translateY(16px);transition:opacity .7s ease, transform .7s ease}
.reveal.show{opacity:1;transform:none}
.marquee{
  overflow:hidden;border:1px solid var(--line);background:rgba(255,255,255,.8);border-radius:999px;padding:10px 0;margin:18px 0 0
}
.marquee div{display:flex;gap:28px;white-space:nowrap;animation:scroll 24s linear infinite;padding-left:18px;color:var(--muted);font-size:14px}
@keyframes scroll{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@media (max-width: 980px){
  .hero-grid,.metrics,.grid-3,.grid-2,.reviews,.cases,.articles,.contact-grid,.footer-grid,.steps{grid-template-columns:1fr}
  .hero-points{grid-template-columns:1fr}
  .nav-links{display:none}
  .menu-btn{display:inline-flex}
  .nav-links.open{
    display:flex;position:absolute;left:16px;right:16px;top:74px;flex-direction:column;align-items:flex-start;
    padding:16px;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow)
  }
  .nav{position:relative}
}