:root{--bg:#05070f;--text:#eaf0ff;--muted:#93a0c2;--cyan:#3de7ff;--line:rgba(120,170,255,.18);--card:rgba(14,22,44,.78);--green:#3dffb0;--danger:#ff5d7a}
*{box-sizing:border-box}body{margin:0;font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:radial-gradient(900px 500px at 10% -10%,rgba(79,124,255,.3),transparent 55%),radial-gradient(800px 400px at 90% 0,rgba(139,92,255,.22),transparent 50%),var(--bg);color:var(--text);min-height:100vh}
.wrap{width:min(900px,calc(100% - 2rem));margin:0 auto}.nav{display:flex;justify-content:space-between;align-items:center;padding:1rem 0;border-bottom:1px solid var(--line)}
.brand{font-weight:800;color:var(--text);text-decoration:none}.muted{color:var(--muted)}a{color:var(--cyan)}
.btn{border:0;border-radius:999px;padding:.7rem 1.1rem;font-weight:700;cursor:pointer;background:linear-gradient(135deg,var(--cyan),#6ea8ff);color:#041018;text-decoration:none;display:inline-block}
.btn.secondary{background:rgba(255,255,255,.06);color:var(--text);border:1px solid var(--line)}
.card{border:1px solid var(--line);border-radius:16px;background:var(--card);padding:1.1rem;margin:.8rem 0}
.card h2{margin:.2rem 0;font-size:1.25rem}.card h2 a{color:var(--text);text-decoration:none}
input,textarea{width:100%;border-radius:12px;border:1px solid var(--line);background:rgba(0,0,0,.28);color:var(--text);padding:.75rem;font:inherit;margin:.35rem 0 .8rem}
.article{line-height:1.75}.article h1,.article h2,.article h3{line-height:1.3}.err{color:var(--danger)}.ok{color:var(--green)}
.hidden{display:none!important}footer{margin:2rem 0;color:var(--muted);font-size:.9rem}

.brand{display:flex;align-items:center;gap:.55rem}
.brand-logo{height:34px;width:auto;display:block}