:root{--bg:#faf7f0;--card:#fff;--ink:#22201a;--muted:#7a756a;--line:#e5ded0;--accent:#c2410c;--accent2:#1d4ed8;--ok:#15803d;--bad:#b91c1c}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.7 system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif}
header{padding:22px 20px 10px;max-width:1020px;margin:0 auto}h1{font-size:24px;margin:0}header p{color:var(--muted);margin:6px 0 0}
.badge{display:inline-block;background:#fef3c7;border:1px solid #f59e0b;border-radius:999px;padding:2px 10px;font-size:12px;margin-left:8px}
.badge.api{background:#dcfce7;border-color:#16a34a}
nav{max-width:1020px;margin:12px auto 0;padding:0 20px;display:flex;gap:8px;flex-wrap:wrap}
nav button{border:1px solid var(--line);background:#fff;padding:9px 16px;border-radius:999px;cursor:pointer;font-size:14px}
nav button.active{background:var(--ink);color:#fff;border-color:var(--ink)}
main{max-width:1020px;margin:14px auto 60px;padding:0 20px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:18px;margin-bottom:14px}
h2{font-size:18px;margin:0 0 10px}h3{font-size:15px;margin:16px 0 8px}
label{display:block;font-size:13px;color:var(--muted);margin:10px 0 4px}
input[type=text],input[type=number],select,textarea{width:100%;border:1px solid var(--line);border-radius:8px;padding:9px 10px;font:inherit;background:#fff}
textarea{min-height:90px;resize:vertical}
button.primary{background:var(--accent);color:#fff;border:0;padding:10px 18px;border-radius:8px;cursor:pointer;font-size:14px}
button.ghost{background:#fff;border:1px solid var(--line);padding:8px 14px;border-radius:8px;cursor:pointer}
button:disabled{opacity:.5;cursor:not-allowed}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
@media(max-width:640px){.grid2{grid-template-columns:1fr}}
.muted{color:var(--muted);font-size:13px}.small{font-size:13px}
.stat{display:inline-block;background:#f5f1e8;border-radius:8px;padding:6px 10px;margin:4px 6px 4px 0;font-size:13px}
.grade{font-weight:700;font-size:20px}.grade.S,.grade.A{color:var(--ok)}.grade.F,.grade.D{color:var(--bad)}
.warn{background:#fef2f2;border:1px solid #fecaca;color:#991b1b;border-radius:8px;padding:10px;margin:10px 0}
.okbox{background:#f0fdf4;border:1px solid #bbf7d0;border-radius:8px;padding:10px;margin:10px 0}
pre{white-space:pre-wrap;word-break:break-word;background:#fafaf9;border:1px solid var(--line);border-radius:8px;padding:12px;font:14px/1.8 inherit}
.book{border:1px solid var(--line);border-radius:10px;padding:12px;margin-bottom:10px}
.tag{display:inline-block;background:#eef2ff;border-radius:999px;padding:2px 8px;font-size:12px;margin:2px}
input[type=checkbox]{accent-color:var(--accent)}
.hidden{display:none}