:root{
  --bg:#0f172a; --card:#1e293b; --card2:#273549; --accent:#38bdf8; --accent2:#a78bfa;
  --ok:#34d399; --warn:#fbbf24; --txt:#e2e8f0; --muted:#94a3b8; --line:#334155;
  --f1:#ef4444; --f2:#f97316; --f3:#eab308; --f4:#22c55e;
  --f5:#14b8a6; --f6:#3b82f6; --f7:#8b5cf6; --f8:#ec4899; --thumb:#94a3b8;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{scroll-behavior:smooth}
body{font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;background:var(--bg);color:var(--txt);line-height:1.75}
a{color:var(--accent);text-decoration:none}
header.top{position:sticky;top:0;z-index:50;background:rgba(15,23,42,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.bar{max-width:1100px;margin:0 auto;padding:10px 16px;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.brand{font-weight:800;color:var(--accent);font-size:18px;white-space:nowrap}
nav.menu{display:flex;gap:6px;flex-wrap:wrap}
nav.menu a{padding:6px 12px;border-radius:18px;color:var(--muted);font-size:14px;border:1px solid transparent}
nav.menu a:hover{color:var(--txt);border-color:var(--line)}
nav.menu a.active{background:var(--accent);color:#06283d;font-weight:700}
.progress-mini{margin-left:auto;font-size:12px;color:var(--muted)}
main{max-width:1100px;margin:0 auto;padding:24px 16px 90px}
.hero{background:linear-gradient(135deg,#0b3b5e,#1e1b4b);border-radius:18px;padding:30px 26px;margin-bottom:20px}
.hero h1{font-size:32px;margin-bottom:8px}
.hero p{color:var(--muted)}
section{margin:26px 0}
h2{font-size:24px;color:var(--accent);border-left:4px solid var(--accent);padding-left:10px;margin:8px 0 14px}
h3{font-size:19px;color:var(--accent2);margin:18px 0 8px}
p,li{color:var(--txt)}
.lead{color:var(--muted);margin-bottom:12px}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px 18px;margin:12px 0}
.grid{display:grid;gap:12px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:780px){.g2,.g3,.g4{grid-template-columns:1fr}}
.pill{display:inline-block;background:var(--card2);border:1px solid var(--line);border-radius:20px;padding:6px 14px;margin:4px;font-size:13px}
.btn{background:var(--accent);color:#06283d;border:none;padding:10px 18px;border-radius:10px;font-weight:700;cursor:pointer;font-size:14px}
.btn.ghost{background:transparent;color:var(--accent);border:1px solid var(--accent)}
.btn:active{transform:scale(.97)}
.tip{background:var(--card);border-left:4px solid var(--warn);padding:12px 16px;border-radius:8px;margin:14px 0}
.steps{list-style:none;counter-reset:s}
.steps li{counter-increment:s;background:var(--card);border:1px solid var(--line);border-radius:10px;padding:12px 14px 12px 46px;position:relative;margin:8px 0}
.steps li::before{content:counter(s);position:absolute;left:12px;top:12px;width:24px;height:24px;background:var(--accent);color:#06283d;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:13px}
/* 键盘 */
.kb-wrap{overflow-x:auto;padding-bottom:6px}
.kb{display:inline-block;background:#0b1220;border-radius:12px;padding:14px;border:1px solid var(--line)}
.kb .row{display:flex;gap:5px;margin-bottom:5px;justify-content:center}
.key{min-width:38px;height:38px;border-radius:6px;background:var(--card2);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:13px;color:var(--txt);padding:0 6px;user-select:none}
.key.f1{background:rgba(239,68,68,.22);border-color:var(--f1);color:#fecaca}
.key.f2{background:rgba(249,115,22,.22);border-color:var(--f2);color:#fed7aa}
.key.f3{background:rgba(234,179,8,.22);border-color:var(--f3);color:#fef08a}
.key.f4{background:rgba(34,197,94,.22);border-color:var(--f4);color:#bbf7d0}
.key.f5{background:rgba(20,184,166,.22);border-color:var(--f5);color:#99f6e4}
.key.f6{background:rgba(59,130,246,.22);border-color:var(--f6);color:#bfdbfe}
.key.f7{background:rgba(139,92,246,.22);border-color:var(--f7);color:#ddd6fe}
.key.f8{background:rgba(236,72,153,.22);border-color:var(--f8);color:#fbcfe8}
.key.thumb{background:rgba(148,163,184,.18);border-color:var(--thumb);color:#e2e8f0}
.legend{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}
.legend span{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--txt)}
.dot{width:14px;height:14px;border-radius:4px;display:inline-block}
/* 打字机 */
.type-target{font-family:"Courier New",monospace;font-size:20px;line-height:2;background:#0b1220;border:1px solid var(--line);border-radius:12px;padding:16px;letter-spacing:1px;white-space:pre-wrap;word-break:break-all}
.type-target .done{color:var(--ok)}
.type-target .cur{background:var(--accent);color:#06283d;border-radius:3px}
.type-target .bad{color:#f87171;background:rgba(248,113,113,.18);border-radius:3px}
#typeInput{width:100%;background:#0b1220;color:var(--txt);border:1px solid var(--accent);border-radius:10px;padding:12px;font-size:16px;font-family:inherit;margin-top:10px}
.stat-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:10px}
.stat{background:var(--card2);border:1px solid var(--line);border-radius:10px;padding:10px 16px;text-align:center;min-width:110px}
.stat .v{font-size:24px;font-weight:800;color:var(--accent)}
.stat .l{font-size:12px;color:var(--muted)}
/* 鼠标练习 */
.pad{position:relative;height:260px;background:#0b1220;border-radius:12px;border:1px solid var(--line);overflow:hidden;margin-top:10px}
.target{position:absolute;width:54px;height:54px;border-radius:50%;background:radial-gradient(circle at 30% 30%,#fda4af,#e11d48);display:flex;align-items:center;justify-content:center;font-size:22px;cursor:pointer;box-shadow:0 0 18px rgba(225,29,72,.6);user-select:none}
.dropzone{position:absolute;width:120px;height:120px;border:2px dashed var(--accent);border-radius:14px;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:13px;text-align:center}
.dragbox{position:absolute;width:60px;height:60px;border-radius:10px;background:linear-gradient(135deg,#fbbf24,#f97316);display:flex;align-items:center;justify-content:center;cursor:grab;user-select:none;font-size:13px;color:#06283d;font-weight:700}
.dragbox.grabbing{cursor:grabbing}
.scrollbox{height:200px;overflow-y:auto;background:#0b1220;border:1px solid var(--line);border-radius:12px;padding:14px;margin-top:10px;font-size:14px;color:var(--muted)}
.scrollbox .reveal{margin-top:14px;color:var(--ok);font-weight:700;display:none}
footer{text-align:center;color:var(--muted);font-size:12px;padding:20px;border-top:1px solid var(--line)}
.badge{display:inline-block;background:var(--card2);border:1px solid var(--line);border-radius:8px;padding:4px 10px;font-size:12px;color:var(--muted);margin-left:8px}