*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --primary:#2563eb;
  --primary-dark:#1d4ed8;
  --accent:#06b6d4;
  --bg:#0f172a;
  --bg-card:#1e293b;
  --text:#f1f5f9;
  --text-muted:#94a3b8;
  --border:#334155;
  --radius:12px;
  --max-w:1100px;
}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
  font-size:16px;
}
a{color:var(--accent);text-decoration:none;transition:color .2s}
a:hover{color:#67e8f9}
img{max-width:100%;height:auto;display:block}
.container{max-width:var(--max-w);margin:0 auto;padding:0 20px}

/* Header */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(15,23,42,.92);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:64px;
}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:1.35rem;font-weight:700;color:var(--text)}
.logo-icon{width:32px;height:32px;border-radius:50%;flex-shrink:0;object-fit:cover}
.logo span{color:var(--accent)}
.nav{display:flex;gap:24px;align-items:center}
.nav a{color:var(--text-muted);font-size:.95rem}
.nav a:hover,.nav a.active{color:var(--text)}
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:10px 22px;border-radius:8px;font-weight:600;
  font-size:.95rem;border:none;cursor:pointer;transition:all .2s;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);color:#fff}
.btn-outline{border:1px solid var(--border);color:var(--text);background:transparent}
.btn-outline:hover{border-color:var(--accent);color:var(--accent)}

/* Hero */
.hero{padding:80px 0 60px;text-align:center}
.hero-badge{
  display:inline-block;padding:6px 16px;border-radius:20px;
  background:rgba(37,99,235,.15);color:var(--accent);
  font-size:.85rem;margin-bottom:20px;
}
.hero h1{font-size:2.4rem;line-height:1.3;margin-bottom:16px;font-weight:800}
.hero p{color:var(--text-muted);font-size:1.1rem;max-width:640px;margin:0 auto 32px}
.hero-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.hero-tags{display:flex;gap:12px;justify-content:center;margin-top:28px;flex-wrap:wrap}
.hero-tags span{
  font-size:.82rem;color:var(--text-muted);
  padding:4px 12px;border:1px solid var(--border);border-radius:6px;
}

/* Sections */
section{padding:64px 0}
.section-label{
  font-size:.8rem;text-transform:uppercase;letter-spacing:2px;
  color:var(--accent);margin-bottom:8px;font-weight:600;
}
.section-title{font-size:1.75rem;margin-bottom:12px;font-weight:700}
.section-desc{color:var(--text-muted);margin-bottom:40px;max-width:600px}

/* Cards grid */
.grid-3{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.card{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius);padding:28px;transition:border-color .2s;
}
.card:hover{border-color:var(--primary)}
.card-icon{font-size:2rem;margin-bottom:12px}
.card h3{font-size:1.15rem;margin-bottom:8px}
.card p{color:var(--text-muted);font-size:.92rem}

/* Platform grid */
.platform-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:16px}
.platform-item{
  background:var(--bg-card);border:1px solid var(--border);
  border-radius:var(--radius);padding:24px;text-align:center;
  transition:all .2s;
}
.platform-item:hover{border-color:var(--accent);transform:translateY(-2px)}
.platform-item h4{margin:8px 0 4px;font-size:1rem}
.platform-item p{color:var(--text-muted);font-size:.82rem}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:32px}
.step-num{
  width:40px;height:40px;border-radius:50%;
  background:var(--primary);color:#fff;
  display:flex;align-items:center;justify-content:center;
  font-weight:700;margin-bottom:12px;
}

/* FAQ */
.faq-list{max-width:760px}
.faq-item{border-bottom:1px solid var(--border);padding:20px 0}
.faq-item h3{font-size:1.05rem;margin-bottom:8px}
.faq-item p{color:var(--text-muted);font-size:.92rem}

/* Article */
.article-content{max-width:760px;margin:0 auto}
.article-content h2{font-size:1.4rem;margin:32px 0 12px}
.article-content p,.article-content li{color:var(--text-muted);margin-bottom:16px}
.article-content ul,.article-content ol{padding-left:24px;margin-bottom:16px}
.article-meta{color:var(--text-muted);font-size:.85rem;margin-bottom:32px}
.related-read{
  margin-top:48px;padding:24px;
  background:var(--bg-card);border-radius:var(--radius);
  border:1px solid var(--border);
}
.related-read p{color:var(--text-muted);font-size:.92rem}

/* Table */
table{width:100%;border-collapse:collapse;margin:24px 0}
th,td{padding:12px 16px;text-align:left;border:1px solid var(--border);font-size:.92rem}
th{background:var(--bg-card);font-weight:600}
td{color:var(--text-muted)}

/* CTA block */
.cta-block{
  text-align:center;padding:64px 32px;
  background:linear-gradient(135deg,rgba(37,99,235,.12),rgba(6,182,212,.08));
  border-radius:var(--radius);border:1px solid var(--border);
}
.cta-block h2{margin-bottom:12px}
.cta-block p{color:var(--text-muted);margin-bottom:24px}

/* Footer */
.site-footer{
  border-top:1px solid var(--border);
  padding:40px 0;margin-top:40px;
}
.footer-inner{display:flex;justify-content:space-between;flex-wrap:wrap;gap:24px}
.footer-links{display:flex;gap:20px;flex-wrap:wrap}
.footer-links a{color:var(--text-muted);font-size:.88rem}
.footer-copy{color:var(--text-muted);font-size:.82rem;margin-top:16px}

/* Page header (inner pages) */
.page-header{padding:48px 0 32px;text-align:center}
.page-header h1{font-size:2rem;margin-bottom:12px}
.page-header p{color:var(--text-muted);max-width:600px;margin:0 auto}

/* Ticker */
.ticker{
  overflow:hidden;white-space:nowrap;
  background:rgba(37,99,235,.08);padding:8px 0;
  border-bottom:1px solid var(--border);
}
.ticker-inner{display:inline-block;animation:ticker 30s linear infinite}
.ticker-inner span{color:var(--text-muted);font-size:.82rem;margin:0 24px}
@keyframes ticker{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}

@media(max-width:768px){
  .hero h1{font-size:1.75rem}
  .nav{gap:14px;font-size:.85rem}
  .header-inner{height:56px}
  section{padding:48px 0}
}