body{
    margin:0;
    background:#0b1220;
    color:#dbe4ee;
    font-family:Arial, Helvetica, sans-serif;
    line-height:1.8;
}

.wrapper{
    max-width:1250px;
    margin:auto;
    padding:40px 20px;
}

.hero{
    background:linear-gradient(135deg,#101827,#1b2a40);
    padding:50px;
    border-radius:18px;
    margin-bottom:45px;
    box-shadow:0 0 30px rgba(0,0,0,0.35);
}

h1{
    color:#7dd3fc;
    font-size:2.7rem;
    margin-bottom:20px;
}

h2{
    color:#7dd3fc;
    margin-top:60px;
    border-left:4px solid #38bdf8;
    padding-left:14px;
}

h3{
    color:#93c5fd;
}

.card{
    background:#162131;
    border-radius:16px;
    padding:28px;
    margin-top:25px;
    box-shadow:0 0 18px rgba(0,0,0,0.25);
}

.grid{
    display:grid;
    grid-template-columns:repeat(auto-fit,minmax(320px,1fr));
    gap:24px;
}

.note{
    background:#1d3147;
    border-left:4px solid #38bdf8;
    padding:18px;
    border-radius:10px;
    margin-top:20px;
}

.tip{
    background:#1d3a2b;
    border-left:4px solid #22c55e;
    padding:18px;
    border-radius:10px;
    margin-top:20px;
}

.warning{
    background:#3b1f1f;
    border-left:4px solid #ef4444;
    padding:18px;
    border-radius:10px;
    margin-top:20px;
}

.highlight{
    color:#facc15;
    font-weight:bold;
}

ul{
    padding-left:22px;
}

ul li{
    margin-bottom:10px;
}

table{
    width:100%;
    border-collapse:collapse;
    margin-top:25px;
    background:#162131;
    overflow:hidden;
    border-radius:14px;
}

th, td{
    border:1px solid #334155;
    padding:14px;
    text-align:left;
}

th{
    background:#1e293b;
    color:#7dd3fc;
}

img{
    max-width:100%;
    border-radius:12px;
    margin-top:20px;
    box-shadow:0 0 20px rgba(0,0,0,0.35);
}

a{
    color:#7dd3fc;
    text-decoration:none;
}

a:hover{
    color:#bae6fd;
}

.small{
    color:#cbd5e1;
    font-size:0.95rem;
}