:root{--green:#69B53A;--green-deep:#4E9B2E;--orange:#FF6B35;--sky:#2EC4E6;--lime:#A3E635;
--ink:#1E2A38;--cream:#FFF7ED;--paper:#FFFDF9;--soft:#FFE8D6;--muted:#5B6B7D;--line:#EADBC6;
--grad:linear-gradient(135deg,#C4EC6B,#4E9B2E)}
html[data-theme="dark"]{--ink:#FFF3E2;--cream:#131E29;--paper:#1F2E3D;--soft:#4A3226;--muted:#A9BCCE;--line:#3D5266}
*{box-sizing:border-box;margin:0;padding:0}
body{background:var(--cream);color:var(--ink);font-family:"Fredoka","ZCOOL KuaiLe","Baloo 2","PingFang SC","Microsoft YaHei",sans-serif;letter-spacing:.02em;line-height:1.6}
a{color:inherit}
.wrap{max-width:900px;margin:0 auto;padding:0 18px}
header{position:sticky;top:0;background:var(--cream);border-bottom:2.5px solid var(--ink);z-index:50}
.nav{display:flex;align-items:center;gap:14px;padding:11px 0}
.logo{display:flex;align-items:center;text-decoration:none}
.logo img{height:40px;width:auto}
.navright{margin-left:auto;display:flex;gap:8px;align-items:center}
.chip{border:2px solid var(--ink);background:var(--paper);border-radius:999px;padding:3px 10px;font-size:13.5px;cursor:pointer;font-family:inherit;font-weight:600;color:var(--ink)}
select.chip{appearance:none;-webkit-appearance:none;cursor:pointer}
.hero{padding:44px 0 6px}
.hero h1{font-size:40px;line-height:1.15;font-weight:700}
.hero h1 .roll{color:var(--green-deep)}
html[data-theme="dark"] .hero h1 .roll{color:var(--lime)}
.hero .sub{font-size:17.5px;color:var(--muted);margin-top:12px;max-width:640px}
section{padding:26px 0 4px}
.gtitle h2{font-size:24px;margin-bottom:12px}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.card{display:block;background:var(--paper);border:2.5px solid var(--ink);border-radius:20px;box-shadow:4px 5px 0 rgba(30,42,56,.85);padding:17px 18px;text-decoration:none;transition:transform .08s}
html[data-theme="dark"] .card{box-shadow:4px 5px 0 rgba(0,0,0,.5)}
.card:hover{transform:translate(-1px,-1px)}
.card h3{font-size:16.5px;line-height:1.35}
article{background:var(--paper);border:2.5px solid var(--ink);border-radius:22px;box-shadow:4px 5px 0 rgba(30,42,56,.85);padding:30px 34px;margin:26px 0}
html[data-theme="dark"] article{box-shadow:4px 5px 0 rgba(0,0,0,.5)}
article h1{font-size:31px;line-height:1.25;margin-bottom:10px}
article h2{font-size:22px;margin:26px 0 8px}
article h3{font-size:18px;margin:20px 0 6px}
article p{margin:9px 0;font-size:16px}
article ul,article ol{margin:9px 0 9px 22px;font-size:16px}
article li{margin:4px 0}
article li ul{margin:4px 0 4px 20px}
article img{max-width:100%;border:2px dashed var(--line);border-radius:14px;margin:12px 0;background:#fff}
article a{color:var(--green-deep);font-weight:600}
html[data-theme="dark"] article a{color:var(--lime)}
article code{background:var(--soft);border-radius:6px;padding:1px 6px;font-size:14px}
article pre{background:var(--soft);border-radius:12px;padding:14px;overflow:auto;margin:12px 0}
article pre code{background:none;padding:0}
article blockquote{border-left:4px solid var(--green);padding:4px 14px;color:var(--muted);margin:12px 0}
article table{width:100%;border-collapse:collapse;font-size:15px;margin:12px 0}
article th,article td{padding:8px 10px;text-align:left;border-bottom:2px dashed var(--line)}
article hr{border:none;border-top:2px dashed var(--line);margin:18px 0}
.backlink{display:inline-block;margin-top:24px;font-weight:600;text-decoration:none}
.backlink:hover{color:var(--green-deep)}
.meta{color:var(--muted);font-size:13.5px;margin-bottom:6px}
footer{border-top:2.5px solid var(--ink);padding:24px 0 40px;margin-top:34px;color:var(--muted);font-size:13.5px}
@media (max-width:640px){
.nav{gap:8px}
.logo img{height:32px}
.navright{gap:6px}
.chip{padding:2px 8px;font-size:12.5px}
.hero{padding:30px 0 2px}
.hero h1{font-size:31px}
article{padding:22px 18px;margin:18px 0}
article h1{font-size:26px}
article h2{font-size:20px}
article table{display:block;overflow-x:auto}
.cards{grid-template-columns:1fr}}