*{box-sizing:border-box}

html{scroll-behavior:smooth}

body{margin:0;font-family:Arial,Helvetica,sans-serif;background:#f6f8fc;color:#172033;line-height:1.7}

a{text-decoration:none;color:inherit}

.header{background:#fff;border-bottom:1px solid #e7ebf2;position:sticky;top:0;z-index:10}

.nav{max-width:1100px;margin:auto;padding:16px 22px;display:flex;align-items:center;justify-content:space-between;gap:20px}

.brand{font-weight:800;letter-spacing:.3px}

.brand small{display:block;font-size:11px;color:#6b7280;margin-top:2px;font-weight:600}

.back{font-size:14px;font-weight:700;color:#1f5eff}

.hero{background:linear-gradient(135deg,#102a43,#1f5eff);color:#fff;padding:70px 22px}

.hero-inner{max-width:1100px;margin:auto}

.kicker{font-size:12px;letter-spacing:1.5px;font-weight:800;opacity:.8;margin-bottom:14px}

h1{font-size:46px;line-height:1.15;margin:0 0 18px;max-width:850px}

.hero p{max-width:780px;font-size:18px;margin:0;color:#eaf0ff}

.container{max-width:900px;margin:0 auto;padding:48px 22px 70px}

.notice{background:#fff8e6;border:1px solid #f0d58a;border-radius:14px;padding:18px 20px;margin-bottom:34px}

.notice strong{display:block;margin-bottom:5px}

h2{font-size:30px;line-height:1.25;margin:42px 0 14px}

h3{font-size:21px;margin:28px 0 10px}

p{margin:0 0 16px}

.card{background:#fff;border:1px solid #e7ebf2;border-radius:16px;padding:24px;margin:22px 0;box-shadow:0 4px 18px rgba(20,35,70,.04)}

table{width:100%;border-collapse:collapse;margin:18px 0;background:#fff}

th,td{border:1px solid #e3e8f0;padding:14px;text-align:left;vertical-align:top}

th{background:#f1f5fb}

ul{padding-left:22px;margin:12px 0 18px}

li{margin:8px 0}

.faq{background:#fff;border:1px solid #e7ebf2;border-radius:14px;padding:20px;margin:16px 0}

.cta{margin-top:42px;background:#102a43;color:#fff;border-radius:18px;padding:30px}

.cta h2{margin:0 0 12px;font-size:28px}

.cta a{display:inline-block;background:#fff;color:#102a43;padding:12px 18px;border-radius:9px;font-weight:800;margin-top:8px}

.related{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:18px}

.related a{background:#fff;border:1px solid #e7ebf2;border-radius:12px;padding:16px;font-weight:700}

.footer{border-top:1px solid #e7ebf2;padding:28px 22px;text-align:center;color:#6b7280;background:#fff}

@media(max-width:700px){

.nav{padding:14px 16px}

.hero{padding:52px 18px}

h1{font-size:34px}

.container{padding:34px 18px 55px}

h2{font-size:26px}

.related{grid-template-columns:1fr}

table{font-size:14px}

th,td{padding:10px}

}

.table-of-contents{

  margin:24px 0;

  border:1px solid #e1e6ee;

  border-radius:12px;

  background:#f8fafc;

  overflow:hidden;

}



.toc-toggle{

  width:100%;

  border:0;

  background:#071b35;

  color:#fff;

  padding:16px 18px;

  font-size:16px;

  font-weight:700;

  display:flex;

  justify-content:space-between;

  align-items:center;

  cursor:pointer;

}



.toc-arrow{

  font-size:18px;

  line-height:1;

}



.toc-content{

  display:none;

  padding:14px 22px;

}



.table-of-contents.open .toc-content{

  display:block;

}



.toc-content ul{

  margin:0;

  padding-left:18px;

}



.toc-content li{

  margin:10px 0;

}



.toc-content a{

  color:#0d3b66;

  text-decoration:none;

  font-weight:600;

}



.toc-content a:hover{

  text-decoration:underline;

}



@media(max-width:600px){

  .toc-toggle{

    padding:15px;

  }



  .toc-content{

    padding:12px 18px;

  }

}

.author-box{

    margin:30px 0;

    padding:20px;

    border:1px solid #ddd;

    border-radius:10px;

    background:#f8f9fa;

}

.author-box strong{

    display:block;

    font-size:18px;

    margin-bottom:5px;

}

.author-box span{

    display:block;

    font-size:14px;

    margin-bottom:12px;

    color:#555;

}

.author-box p{

    margin:0;

    line-height:1.6;

}