:root{--b:#1d4ed8;--b2:#1e40af;--bg:#f5f7fb;--card:#fff;--t:#0f172a;--m:#64748b;--ok:#15803d;--bad:#b91c1c;--y:#facc15}
*{box-sizing:border-box}body{margin:0;font-family:"Segoe UI",system-ui,-apple-system,Roboto,Arial,sans-serif;background:var(--bg);color:var(--t);line-height:1.5}
a{color:var(--b)}.top{display:flex;justify-content:space-between;align-items:center;padding:10px 18px;background:#fff;border-bottom:1px solid #e2e8f0;position:sticky;top:0;z-index:20}
.brand{display:flex;gap:10px;align-items:center;text-decoration:none;color:var(--t)}.brand img{border-radius:10px}.brand b{display:block;font-size:1.15rem;color:var(--b)}.brand small{color:var(--m)}
nav{display:flex;gap:14px;align-items:center}nav a{text-decoration:none;font-weight:600}
main{max-width:1200px;margin:0 auto;padding:18px}.foot{text-align:center;color:var(--m);padding:24px 10px;font-size:.9rem}
.hero{background:linear-gradient(135deg,#1d4ed8,#3b82f6);color:#fff;border-radius:18px;padding:34px 26px;text-align:center;margin-bottom:22px}
.hero img{width:96px;border-radius:22px;box-shadow:0 6px 20px #0003}.hero h1{margin:10px 0 0;font-size:2.4rem}.hero .sub{font-size:1.2rem;opacity:.9;margin:0}.hero .tag{font-size:1.35rem;font-weight:600;margin-top:12px;color:#fef08a}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.card{background:var(--card);border-radius:14px;padding:18px;box-shadow:0 1px 3px #0001,0 4px 14px #0000000a;margin-bottom:16px}
.card h2,.card h3{margin-top:0}.sect{display:flex;flex-wrap:wrap;gap:8px}
.btn{background:var(--b);color:#fff;border:0;border-radius:10px;padding:10px 16px;font-weight:600;cursor:pointer;text-decoration:none;display:inline-block;font-size:.95rem}
.btn:hover{background:var(--b2)}.btn.ghost{background:#e0e7ff;color:var(--b)}.btn.red{background:#dc2626}.btn.small{padding:6px 12px;font-size:.85rem}.btn:disabled{opacity:.5;cursor:default}
.bar{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;background:#fff;padding:10px 14px;border-radius:12px;margin-bottom:14px;position:sticky;top:66px;z-index:10;box-shadow:0 1px 3px #0001}
.timer{font-variant-numeric:tabular-nums;font-weight:700;font-size:1.2rem;background:#eef2ff;padding:4px 12px;border-radius:8px}.timer.low{background:#fee2e2;color:var(--bad)}
.tabs{display:flex;gap:6px;flex-wrap:wrap}.tabs button{border:1px solid #c7d2fe;background:#fff;border-radius:8px;padding:6px 12px;cursor:pointer;font-weight:600}.tabs button.on{background:var(--b);color:#fff}
.split{display:grid;grid-template-columns:1fr 1fr;gap:16px}@media(max-width:860px){.split{grid-template-columns:1fr}.bar{top:0}.hero h1{font-size:1.8rem}}
.passage{max-height:75vh;overflow:auto}.passage p{margin:0 0 .9em}.plabel{font-weight:700;color:var(--b);margin-right:6px}
.qs{max-height:75vh;overflow:auto}.grp{margin-bottom:20px}.instr{font-style:italic;color:#334155;background:#f8fafc;padding:8px;border-left:4px solid var(--b);border-radius:4px}
.q{margin:8px 0;padding:6px 0;border-bottom:1px dashed #e2e8f0}.qn{display:inline-block;min-width:28px;font-weight:700;background:#e0e7ff;color:var(--b);border-radius:6px;text-align:center;margin-right:6px}
input[type=text],select,textarea,input[type=password],input[type=url]{font:inherit;border:1px solid #cbd5e1;border-radius:8px;padding:6px 8px}input.gap{width:150px}
.opts label{display:block;margin:2px 0 2px 34px;cursor:pointer}.q.right{background:#f0fdf4}.q.wrong{background:#fef2f2}.key{font-size:.9rem;margin:4px 0 0 34px;color:#334155}.key b.ok{color:var(--ok)}.key b.no{color:var(--bad)}
.boxopts{background:#f8fafc;border:1px solid #e2e8f0;border-radius:8px;padding:8px 12px;margin:8px 0}.mapimg{max-width:100%;border:1px solid #e2e8f0;border-radius:10px}
.result{text-align:center}.band{font-size:3rem;font-weight:800;color:var(--b)}.note{font-size:.85rem;color:var(--m)}
textarea.essay{width:100%;min-height:380px;line-height:1.6;font-size:1rem}.wc{font-weight:700}.wc.ok{color:var(--ok)}.wc.under{color:var(--bad)}
.bands{display:grid;grid-template-columns:1fr auto;gap:6px 12px;align-items:center}.meter{height:8px;background:#e2e8f0;border-radius:5px;overflow:hidden;grid-column:1/3}.meter i{display:block;height:100%;background:linear-gradient(90deg,#f59e0b,#22c55e)}
.bnum{font-weight:800;color:var(--b);font-size:1.1rem}.ovr{font-size:2rem}.tips li{margin-bottom:4px}.badge{display:inline-block;background:#fef9c3;color:#854d0e;border-radius:6px;padding:2px 8px;font-size:.8rem;font-weight:600}
.cue{border:2px solid var(--b);border-radius:12px;padding:16px;background:#f8fbff}.rec{display:flex;gap:8px;align-items:center;flex-wrap:wrap;margin:10px 0}.dot{width:12px;height:12px;border-radius:50%;background:#dc2626;display:inline-block;animation:p 1s infinite}@keyframes p{50%{opacity:.2}}
.transcript p{margin:.3em 0}.switch{display:flex;align-items:center;gap:8px;cursor:pointer}.muted{color:var(--m)}table.conv{border-collapse:collapse;font-size:.85rem}table.conv td,table.conv th{border:1px solid #e2e8f0;padding:2px 8px}
.chart{max-width:100%;border:1px solid #e2e8f0;border-radius:8px}.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
[hidden]{display:none!important}