*{box-sizing:border-box}

html{scroll-behavior:smooth}

body{

margin:0;

font-family:Arial,Helvetica,sans-serif;

background:#f6f8fc;

color:#172033;

line-height:1.75;

}

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

.header{

background:#fff;

border-bottom:1px solid #e7ebf2;

position:sticky;

top:0;

z-index:10;

}

.nav{

max-width:1050px;

margin:auto;

padding:16px 22px;

display:flex;

align-items:center;

justify-content:space-between;

gap:20px;

}

.brand{

font-weight:800;

letter-spacing:.3px;

font-size:17px;

}

.back{

font-size:14px;

font-weight:700;

color:#315efb;

}

.hero{

background:linear-gradient(135deg,#101b36,#244b9a);

color:#fff;

padding:70px 22px;

}

.hero-inner{

max-width:900px;

margin:auto;

}

.kicker{

font-size:12px;

font-weight:800;

letter-spacing:1.5px;

opacity:.75;

margin-bottom:12px;

}

h1{

font-size:42px;

line-height:1.2;

margin:0 0 18px;

}

.hero p{

font-size:18px;

max-width:760px;

margin:0;

opacity:.92;

}

.container{

max-width:900px;

margin:auto;

padding:55px 22px 70px;

}

.article{

background:#fff;

border:1px solid #e7ebf2;

border-radius:18px;

padding:38px;

box-shadow:0 8px 30px rgba(30,50,90,.05);

}

h2{

font-size:27px;

line-height:1.3;

margin-top:42px;

color:#13203a;

}

h3{

font-size:20px;

line-height:1.4;

margin-top:26px;

}

p{font-size:16px}

ul{

padding-left:22px;

}

li{margin:9px 0}

.notice{

background:#eef4ff;

border-left:4px solid #315efb;

padding:18px;

border-radius:8px;

margin:25px 0;

}

.compare{

width:100%;

border-collapse:collapse;

margin:25px 0;

overflow:hidden;

border-radius:12px;

}

.compare th,.compare td{

border:1px solid #e4e9f2;

padding:14px;

text-align:left;

vertical-align:top;

}

.compare th{

background:#f1f5fb;

font-size:15px;

}

.related{

margin-top:42px;

padding-top:25px;

border-top:1px solid #e7ebf2;

}

.related a{

display:block;

padding:12px 0;

color:#315efb;

font-weight:700;

}

.footer{

text-align:center;

padding:30px 20px;

font-size:14px;

color:#667085;

}

@media(max-width:700px){

h1{font-size:31px}

.hero{padding:52px 20px}

.article{padding:25px 20px}

.compare{font-size:14px}

.compare th,.compare 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;

}