:root{
  --brand:#7a4f9e; --brand-d:#5d3a7c; --brand-l:#efe7f6;
  --bg:#f6f7f9; --panel:#fff; --ink:#1f2430; --muted:#5b6472; --line:#e6e2ec;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.55}
a{color:var(--brand-d)}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
header.top{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:10}
header.top .wrap{display:flex;align-items:center;gap:12px;height:58px}
.logo{font-weight:800;color:var(--brand-d);text-decoration:none;font-size:18px}
.top .sp{flex:1}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;background:var(--brand);color:#fff;border:0;
  border-radius:10px;padding:11px 18px;font-size:15px;font-weight:600;cursor:pointer;text-decoration:none}
.btn:hover{background:var(--brand-d)}
.btn.ghost{background:#fff;color:var(--brand-d);border:1px solid var(--line)}
.btn.sm{padding:7px 12px;font-size:14px}
.hero{padding:48px 0 24px}
.hero h1{font-size:34px;margin:0 0 10px}
.hero p{font-size:18px;color:var(--muted);margin:0 0 22px;max-width:640px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:22px;margin:16px 0}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:16px}
.course{display:flex;flex-direction:column;gap:6px;text-decoration:none;color:inherit}
.course h3{margin:0;font-size:18px;color:var(--brand-d)}
.course .meta{font-size:13px;color:var(--muted)}
.course .locked{font-size:12px;color:#a24a2c;font-weight:600}
label{display:block;font-size:13px;font-weight:600;color:var(--muted);margin:12px 0 4px}
input[type=email],input[type=text]{width:100%;border:1px solid var(--line);border-radius:10px;padding:11px 12px;font-size:16px}
.note{font-size:13px;color:var(--muted);margin:10px 0 0}
.err{color:#c0392b;font-size:14px;margin:10px 0 0;min-height:1em}
.center{max-width:420px;margin:40px auto}
.lessons{list-style:none;margin:0;padding:0}
.lessons li{border:1px solid var(--line);border-radius:10px;margin:8px 0;background:#fff}
.lessons button{width:100%;text-align:left;background:none;border:0;padding:13px 14px;font-size:15px;cursor:pointer;
  display:flex;align-items:center;gap:10px;color:var(--ink)}
.lessons button:hover{background:var(--brand-l)}
.lessons .n{width:26px;height:26px;flex:0 0 auto;border-radius:50%;background:var(--brand-l);color:var(--brand-d);
  display:inline-flex;align-items:center;justify-content:center;font-size:13px;font-weight:700}
.player{position:relative;aspect-ratio:16/9;background:#000;border-radius:12px;overflow:hidden;margin:14px 0}
.player iframe{width:100%;height:100%;border:0}
.player .ph{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;color:#cbd0d6;font-size:14px}
.cf-wm{position:absolute;top:8%;left:6%;color:rgba(255,255,255,.5);font-size:12px;pointer-events:none;
  text-shadow:0 1px 2px rgba(0,0,0,.6);transition:top 1s,left 1s;z-index:2}
.muted{color:var(--muted)}
.tag{display:inline-block;background:var(--brand-l);color:var(--brand-d);border-radius:999px;padding:3px 10px;font-size:12px;font-weight:600}