:root{--c:#54b4b4;--bg:#f8faff;--tx:#1f2a33}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{width:auto;max-width:none;max-height:none;overflow-x:hidden;font-family:"Montserrat",Arial,sans-serif;background:var(--bg);color:var(--tx);line-height:1.7}
.lg-top{background:#fff;box-shadow:0 2px 10px rgba(0,0,0,.06)}
.lg-wrap{max-width:900px;margin:0 auto;padding:0 20px}
.lg-top .lg-wrap{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;padding-top:16px;padding-bottom:16px}
.lg-brand{font-weight:800;font-size:22px;color:var(--c);text-decoration:none;text-transform:uppercase}
.lg-top nav a{margin-left:20px;font-size:14px;text-transform:uppercase;color:#000;text-decoration:none}
.lg-top nav a:hover{color:var(--c)}
.lg-hero{padding:50px 0 20px}
.lg-label{display:inline-block;font-size:12px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--c);margin-bottom:10px}
.lg-hero h1{font-size:40px;line-height:1.2;font-weight:800;margin-bottom:12px}
.lg-hero p{color:#566;max-width:700px}
.lg-toc{background:#fff;border-radius:10px;padding:22px 28px;margin:25px 0}
.lg-toc ol{columns:2;column-gap:30px;padding-left:20px}
.lg-toc a{color:var(--tx);text-decoration:none;font-size:14px}
.lg-toc a:hover{color:var(--c)}
.lg-sec{background:#fff;border-radius:10px;padding:26px 28px;margin-bottom:16px}
.lg-sec h2{font-size:20px;margin-bottom:10px}
.lg-sec h2 span{color:var(--c);margin-right:8px}
.lg-sec p,.lg-sec li{font-size:15px;margin-bottom:8px}
.lg-sec ul{padding-left:22px}
.lg-sec a{color:var(--c)}
.lg-foot{text-align:center;padding:40px 20px;font-size:14px;color:#566}
.lg-foot nav{margin:12px 0}
.lg-foot a{color:var(--c);text-decoration:none;margin:0 8px}
@media(max-width:640px){.lg-hero h1{font-size:28px}.lg-toc ol{columns:1}.lg-top nav a{margin:0 12px 0 0}}