:root{color-scheme:dark;--bg:#101722;--panel:#182335;--line:#2c405a;--accent:#6fd3ff;--danger:#f27878;--text:#edf4ff;--muted:#a9b9cb}*{box-sizing:border-box}body{margin:0;background:linear-gradient(135deg,#101722,#172d40);font-family:system-ui,-apple-system,"Microsoft YaHei",sans-serif;color:var(--text)}a{color:var(--accent)}.topbar{display:flex;justify-content:space-between;align-items:center;padding:18px 6%;background:#0b121c;border-bottom:1px solid var(--line)}.brand{font-weight:700;color:var(--accent);letter-spacing:1px}.wrap{max-width:1120px;margin:42px auto;padding:0 20px}h1{margin-bottom:28px}.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}.card,.result,.login-card{background:rgba(24,35,53,.94);border:1px solid var(--line);border-radius:12px;padding:22px;box-shadow:0 12px 30px #0004}.card h2{margin-top:0;font-size:18px}.card label,.login-card label{display:block;margin:14px 0;color:var(--muted)}input,textarea{display:block;width:100%;margin-top:7px;padding:11px;border-radius:7px;border:1px solid #49627f;background:#0e1826;color:var(--text);font:inherit}textarea{min-height:90px;resize:vertical}button{border:0;border-radius:7px;padding:11px 18px;background:var(--accent);color:#062032;font-weight:700;cursor:pointer}.danger{background:var(--danger);color:#280b0b}.check{display:flex!important;align-items:center;gap:8px}.check input{width:auto;margin:0}.result{margin:20px 0}.result pre{white-space:pre-wrap;overflow:auto;color:#d8f1ff}.success{padding:12px;background:#144f3d;border:1px solid #2b9c7e;border-radius:8px}.error{padding:10px;background:#53242b;border:1px solid #b65461;border-radius:8px}.login-page{display:grid;min-height:100vh;place-items:center}.login-card{width:min(420px,calc(100% - 30px))}.login-card h1{text-align:center;font-size:24px}.login-card button{width:100%;margin-top:12px}