:root{--bg:#070b1a;--panel:#0e1530;--panel2:#141d3f;--line:#26325f;--text:#e8ecff;--dim:#8a93c4;--gold:#ffd35c;--green:#3ddc84;--red:#ff5c7a;--blue:#5c9dff;--purple:#a97cff}*{box-sizing:border-box;margin:0;padding:0}html,body{height:100%}body{background:radial-gradient(1200px 800px at 70% -10%, #17225a 0%, var(--bg) 55%);color:var(--text);font-family:system-ui,Microsoft YaHei,sans-serif;overflow-x:hidden}a{color:var(--blue);text-decoration:none}.app{max-width:1080px;margin:0 auto;padding:16px 16px 96px}.navbar{-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-top:1px solid var(--line);padding:8px 10px calc(8px + env(safe-area-inset-bottom));z-index:50;background:#0a0f24eb;justify-content:center;gap:6px;display:flex;position:fixed;bottom:0;left:0;right:0}.navbar a{color:var(--dim);text-align:center;border-radius:12px;min-width:64px;padding:6px 14px;font-size:12px}.navbar a.active,.navbar a:hover{color:var(--text);background:var(--panel2)}.card{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:16px}.btn{cursor:pointer;-webkit-user-select:none;user-select:none;color:#fff;background:linear-gradient(135deg,#3b6cff,#7a4dff);border:none;border-radius:12px;padding:10px 22px;font-size:15px;font-weight:600;display:inline-block}.btn.secondary{background:var(--panel2);border:1px solid var(--line);color:var(--text)}.btn:disabled{opacity:.4;cursor:not-allowed}.tag{background:var(--panel2);color:var(--dim);border-radius:8px;margin:1px 2px;padding:1px 8px;font-size:11px;display:inline-block}.groups{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;display:grid}.gcard{background:var(--panel);border:1px solid var(--line);cursor:pointer;border-radius:16px;padding:12px;transition:transform .15s,box-shadow .15s;position:relative}.gcard:hover{transform:translateY(-2px);box-shadow:0 6px 24px #5a78ff40}.gcard h4{margin-bottom:4px;font-size:14px}.gcard .bar{background:#1c2751;border-radius:3px;height:6px;margin-top:8px;overflow:hidden}.gcard .bar i{background:linear-gradient(90deg,#3ddc84aa,#3ddc84);height:100%;display:block}.gcard.locked{opacity:.55}.node{cursor:pointer;border:1.5px solid var(--line);width:26px;height:26px;color:var(--dim);background:#1a2348;border-radius:50%;justify-content:center;align-items:center;font-size:10px;transition:transform .12s;display:flex;position:absolute}.node:hover{z-index:5;transform:scale(1.25)}.node.mastered{border-color:var(--green);color:var(--green);background:#0d3b24;box-shadow:0 0 10px #3ddc8466}.node.hole{border-color:var(--red);color:var(--red);animation:1.6s infinite pulse;box-shadow:0 0 14px #ff5c7a99}.node.today{border-color:var(--gold);color:var(--gold);animation:1.2s infinite pulse}.node.junior{background:#2a1d4d}.node.path{border-color:var(--purple);color:var(--purple)}@keyframes pulse{0%,to{box-shadow:0 0 6px}50%{box-shadow:0 0 20px}}.node.lit{border-color:var(--green);color:var(--green);animation:2.4s ease-out infinite ignite}@keyframes ignite{0%{transform:scale(.2);box-shadow:0 0 #3ddc8400}45%{transform:scale(1.9);box-shadow:0 0 34px #3ddc84f2}to{transform:scale(1.15);box-shadow:0 0 16px #3ddc8499}}.nlabel{color:var(--dim);white-space:nowrap;pointer-events:none;text-shadow:0 1px 3px #000;font-size:10px;position:absolute;transform:translate(-50%)}.opts{grid-template-columns:repeat(5,1fr);gap:8px;display:grid}.opt{text-align:center;border:1px solid var(--line);cursor:pointer;background:var(--panel2);border-radius:12px;padding:12px 4px;font-size:16px}.opt:hover{border-color:var(--blue)}.opt.sel{border-color:var(--gold);color:var(--gold)}.opt.right{border-color:var(--green);color:var(--green)}.opt.wrong{border-color:var(--red);color:var(--red)}.stem{font-size:17px;line-height:1.7}.progress{background:#1c2751;border-radius:4px;height:8px;overflow:hidden}.progress i{background:linear-gradient(90deg,#3b6cff,#7a4dff);height:100%;transition:width .4s;display:block}h1{margin:8px 0 14px;font-size:22px}h2{margin:14px 0 8px;font-size:17px}.dim{color:var(--dim);font-size:13px}.grid2{grid-template-columns:1fr 1fr;gap:12px;display:grid}@media (max-width:720px){.grid2{grid-template-columns:1fr}.opts{grid-template-columns:repeat(5,1fr)}}