*{box-sizing:border-box}
body{margin:0;background:#f7f9fc;color:#1a2233;font:17px/1.7 'Segoe UI',system-ui,-apple-system,Roboto,sans-serif}
a{color:#127a5b;text-decoration:none}a:hover{text-decoration:underline}
.top{background:#fff;border-bottom:1px solid #e6ecf3;position:sticky;top:0;z-index:20}
.top .in{max-width:960px;margin:0 auto;padding:14px 20px;display:flex;align-items:center;gap:14px}
.logo{font-weight:800;font-size:1.15rem;color:#0f2e24;display:flex;align-items:center;gap:8px}
.logo .b{background:#127a5b;color:#fff;width:30px;height:30px;border-radius:8px;display:flex;align-items:center;justify-content:center;font-size:1rem}
.top nav{margin-left:auto;display:flex;gap:18px;font-size:.92rem}
.wrap{max-width:820px;margin:0 auto;padding:26px 20px 70px}
.hero{background:linear-gradient(135deg,#0f2e24,#127a5b);color:#fff;border-radius:18px;padding:44px 34px;margin:14px 0 8px}
.hero h1{font-size:2.15rem;line-height:1.15;margin:0 0 .3em}
.hero p{font-size:1.12rem;color:#d6efe6;max-width:640px}
.badge{display:inline-block;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.25);padding:5px 12px;border-radius:20px;font-size:.8rem;margin-bottom:14px}
h1{font-size:2rem;line-height:1.2;color:#0f2e24}
h2{font-size:1.45rem;margin:1.7em 0 .4em;color:#0f2e24}
h3{font-size:1.1rem;margin:1.2em 0 .3em}
.lead{font-size:1.12rem;color:#40546b}
.btn{display:inline-block;background:#127a5b;color:#fff;padding:13px 26px;border-radius:10px;font-weight:700;margin:12px 8px 12px 0}
.btn.alt{background:#fff;color:#127a5b;border:1.5px solid #127a5b}
.grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:22px 0}
@media(max-width:640px){.grid{grid-template-columns:1fr}.hero h1{font-size:1.7rem}}
.card{background:#fff;border:1px solid #e6ecf3;border-radius:12px;padding:18px 20px}
.lessons{list-style:none;padding:0;counter-reset:l;margin:18px 0}
.lessons li{counter-increment:l;background:#fff;border:1px solid #e6ecf3;border-radius:12px;margin:10px 0}
.lessons li a{display:flex;gap:14px;align-items:center;padding:16px 18px;color:#1a2233}
.lessons li a::before{content:counter(l);flex:0 0 34px;height:34px;background:#e7f5ef;color:#127a5b;border-radius:9px;display:flex;align-items:center;justify-content:center;font-weight:800}
.tip{background:#eef7f2;border-left:4px solid #127a5b;border-radius:8px;padding:16px 18px;margin:22px 0}
.tip strong{color:#0f2e24}
nav.bc{font-size:.85rem;color:#7d8ba0;margin-bottom:14px}
.pn{display:flex;justify-content:space-between;gap:12px;margin-top:36px;border-top:1px solid #e6ecf3;padding-top:18px;font-size:.95rem}
ul,ol{padding-left:22px}
footer{background:#0f2e24;color:#bfe3d5;margin-top:50px}
footer .in{max-width:820px;margin:0 auto;padding:26px 20px;font-size:.88rem}
footer a{color:#9fe0c6}
.discl{font-size:.8rem;color:#8595a8;margin-top:8px}