/* 问题库专用样式：比首页轻，单页体积小、加载快 */
*{box-sizing:border-box;margin:0;padding:0}
:root{--acc:#22E39A;--card:rgba(255,255,255,.045);--line:rgba(255,255,255,.1);
 --muted:#93A2B0;--muted2:#6C7A88}
body{background:#08111A;color:#EAF2F8;font:16px/1.85 -apple-system,BlinkMacSystemFont,
 "PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}
a{color:#9DF0C6}
.wrap{width:min(880px,100% - 40px);margin:0 auto}
header{border-bottom:1px solid var(--line);background:rgba(8,17,26,.92);
 position:sticky;top:0;z-index:20;backdrop-filter:blur(10px)}
.navx{display:flex;align-items:center;gap:18px;flex-wrap:wrap;padding:13px 0}
.logo{font-weight:900;color:#fff;text-decoration:none;font-size:15.5px;display:flex;
 align-items:center;gap:9px}
.logo .mark{width:27px;height:27px;border-radius:9px;background:linear-gradient(135deg,#22E39A,#12B87C);
 color:#04140C;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:900}
.navx nav{display:flex;gap:15px;flex-wrap:wrap;margin-left:auto;font-size:14px}
.navx nav a{color:#9FB0BF;text-decoration:none}
.navx nav a:hover{color:#fff}
.crumb{font-size:13px;color:var(--muted2);margin:22px 0 6px;display:flex;gap:7px;flex-wrap:wrap}
.crumb a{color:#8A98A6;text-decoration:none}
.crumb b{color:#B9C6D2;font-weight:700}
h1{font-size:27px;line-height:1.5;margin:8px 0 14px;font-weight:900;letter-spacing:-.3px}
h2{font-size:18.5px;font-weight:900;margin:30px 0 10px;padding-left:12px;
 border-left:3px solid var(--acc);line-height:1.5}
p{margin:9px 0;color:#C6D3DE}
.lead{font-size:16.5px;color:#DCE7F0;background:var(--card);border:1px solid var(--line);
 border-left:3px solid var(--acc);border-radius:0 12px 12px 0;padding:14px 18px;margin:14px 0 6px}
ul{margin:10px 0 10px 4px;padding-left:20px}
li{margin:7px 0;color:#C6D3DE}
ul.plain{list-style:none;padding-left:0;display:grid;grid-template-columns:1fr 1fr;gap:8px 16px}
ul.plain li{background:var(--card);border:1px solid var(--line);border-radius:11px;
 padding:10px 14px;margin:0;font-size:14.4px;line-height:1.6}
ul.plain li a{text-decoration:none;color:#D6E6F0}
ul.plain li a:hover{color:#22E39A}
b,strong{color:#fff}
code{background:rgba(255,255,255,.08);border-radius:5px;padding:1px 6px;font-size:13.5px;
 color:#9DF0C6}
.tw{overflow-x:auto;margin:14px 0}
table{border-collapse:collapse;width:100%;font-size:13.8px;min-width:520px}
th,td{border:1px solid var(--line);padding:9px 12px;text-align:left;vertical-align:top}
th{background:rgba(34,227,154,.09);color:#9DF0C6;font-weight:800;white-space:nowrap}
td{color:#C6D3DE}
.tip{margin-top:14px;background:rgba(34,227,154,.06);border:1px solid rgba(34,227,154,.22);
 border-radius:12px;padding:13px 16px;color:#B9C6D2;font-size:13.8px;line-height:1.9}
.cta{margin:34px 0 10px;background:linear-gradient(135deg,rgba(34,227,154,.14),rgba(34,227,154,.05));
 border:1px solid rgba(34,227,154,.32);border-radius:16px;padding:22px 24px}
.cta b{display:block;font-size:16.5px;color:#fff;margin-bottom:7px}
.cta span{color:#B9C6D2;font-size:14px;line-height:1.9;display:block}
.cbtn{display:inline-block;margin-top:15px;background:linear-gradient(135deg,#22E39A,#12B87C);
 color:#04140C;font-weight:900;text-decoration:none;padding:13px 26px;border-radius:12px;font-size:15px}
.relbox{margin:30px 0 10px;border-top:1px solid var(--line);padding-top:18px}
.relbox h2{border:0;padding:0;font-size:15.5px;margin-bottom:12px}
.relbox ul{list-style:none;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:8px 16px}
.relbox li{margin:0;background:var(--card);border:1px solid var(--line);border-radius:11px;
 padding:10px 14px;font-size:14px}
.relbox a{text-decoration:none}
footer{margin-top:56px;border-top:1px solid var(--line);padding:26px 0 40px}
.fnav{display:flex;gap:16px;flex-wrap:wrap;font-size:13.6px}
.fnav a{color:#8A98A6;text-decoration:none}
.fnav a:hover{color:#fff}
.fcopy{margin-top:14px;color:var(--muted2);font-size:12.6px;line-height:1.9}
.fcopy a{color:#7C8B99}
@media (max-width:720px){
  h1{font-size:22px}
  h2{font-size:17px}
  ul.plain,.relbox ul{grid-template-columns:1fr}
  .wrap{width:calc(100% - 28px)}
}