:root{
  --bg:#f6f4ef; --card:#fff; --ink:#1d2433; --muted:#5c6577; --line:#e3dfd5;
  --primary:#1f3a5f; --primary-2:#2d5486; --accent:#c8553d;
  --ok:#2f7d5b; --ok-bg:#e6f3ec; --bad:#b4372a; --bad-bg:#fbe9e6; --warn:#9a6a10; --warn-bg:#fdf3dc;
  --radius:12px; --shadow:0 1px 2px rgba(20,30,50,.06),0 6px 20px rgba(20,30,50,.05);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 system-ui,-apple-system,"Segoe UI",Roboto,sans-serif}
h1,h2,h3{font-family:Georgia,"Times New Roman",serif;line-height:1.25;margin:0 0 .5em}
h1{font-size:2rem} h2{font-size:1.5rem} h3{font-size:1.2rem} h4{margin:1.2em 0 .4em;font-size:1rem}
a{color:var(--primary-2)}
.top{position:sticky;top:0;z-index:10;display:flex;align-items:center;gap:20px;padding:12px 24px;background:var(--primary);color:#fff;flex-wrap:wrap}
.brand{color:#fff;text-decoration:none;font-weight:700;font-size:1.15rem;display:flex;align-items:center;gap:8px;letter-spacing:.02em}
.brand b{color:#f2b8a8;font-weight:700}
.dot{width:10px;height:10px;border-radius:50%;background:var(--accent);display:inline-block}
#nav{display:flex;gap:4px;flex:1;flex-wrap:wrap}
#nav a{color:#d6e0ef;text-decoration:none;padding:6px 14px;border-radius:999px;font-size:.95rem}
#nav a:hover{background:rgba(255,255,255,.12)}
#nav a.on{background:#fff;color:var(--primary);font-weight:600}
.badge{font-size:.78rem;padding:4px 10px;border-radius:999px;background:rgba(255,255,255,.14);color:#fff}
.badge.ok{background:#2f7d5b} .badge.off{background:#7a4a1f}
main{max-width:1060px;margin:0 auto;padding:28px 20px 60px;outline:none}
.foot{max-width:1060px;margin:0 auto;padding:20px;color:var(--muted);font-size:.82rem;border-top:1px solid var(--line)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);margin-bottom:18px}
.grid{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.tile{display:block;text-decoration:none;color:inherit;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);transition:transform .15s,border-color .15s}
.tile:hover{transform:translateY(-2px);border-color:var(--primary-2)}
.tile .ic{font-size:1.6rem}
.tile h3{margin:.4em 0 .2em}
.tile p{margin:0;color:var(--muted);font-size:.93rem}
.hero{padding:36px 28px;border-radius:16px;background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;margin-bottom:22px}
.hero p{max-width:640px;color:#dbe5f4;margin:.4em 0 1em}
.hero h1{margin-bottom:.2em}
.btn{display:inline-block;border:0;cursor:pointer;background:var(--accent);color:#fff;padding:10px 18px;border-radius:9px;font:600 .95rem system-ui;text-decoration:none}
.btn:hover{filter:brightness(1.07)} .btn:disabled{opacity:.5;cursor:not-allowed}
.btn.sec{background:#fff;color:var(--primary);border:1px solid var(--primary)}
.btn.ghost{background:transparent;color:var(--primary-2);border:1px solid var(--line)}
.btn.sm{padding:5px 11px;font-size:.84rem}
.row{display:flex;gap:12px;flex-wrap:wrap;align-items:center}
.muted{color:var(--muted)} .small{font-size:.85rem}
.note{background:var(--warn-bg);border-left:4px solid var(--warn);padding:10px 14px;border-radius:6px;margin:14px 0;font-size:.92rem}
.tbl{width:100%;border-collapse:collapse;margin:10px 0;font-size:.93rem}
.tbl th,.tbl td{border:1px solid var(--line);padding:7px 10px;text-align:left;vertical-align:top}
.tbl th{background:#f0ede4}
.guide{display:grid;grid-template-columns:230px 1fr;gap:24px}
.toc{position:sticky;top:76px;align-self:start;display:flex;flex-direction:column;gap:2px}
.toc a{padding:7px 12px;border-radius:8px;text-decoration:none;color:var(--ink);font-size:.93rem}
.toc a:hover{background:#ebe7dc} .toc a.on{background:var(--primary);color:#fff}
@media(max-width:780px){.guide{grid-template-columns:1fr}.toc{position:static;flex-direction:row;flex-wrap:wrap}}
fieldset{border:1px solid var(--line);border-radius:10px;margin:0 0 16px;padding:12px 16px}
legend{font-weight:600;padding:0 6px}
label.chk{display:inline-flex;gap:6px;align-items:center;margin:4px 14px 4px 0;cursor:pointer}
input[type=range]{width:240px;vertical-align:middle}
input[type=text],textarea,select{font:inherit;border:1px solid #c9c4b6;border-radius:8px;padding:8px 10px;background:#fff;color:var(--ink)}
input[type=text]{width:240px}
textarea{width:100%;min-height:300px;line-height:1.55;resize:vertical}
.sec-title{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}
.pill{display:inline-block;padding:2px 10px;border-radius:999px;background:#ebe7dc;font-size:.8rem;margin-right:6px}
.passage p{text-align:justify;margin:.7em 0}
.q{padding:14px 0;border-top:1px dashed var(--line)}
.q:first-of-type{border-top:0}
.q .qt{font-weight:600;margin-bottom:6px}
.q .opts label{display:block;padding:3px 0;cursor:pointer}
.player{background:#eef2f8;border:1px solid #d3deee;border-radius:10px;padding:14px;margin-bottom:14px}
.player audio{width:100%;margin-top:8px}
.timer{font-variant-numeric:tabular-nums;font-weight:700;background:#fff;border:1px solid var(--line);padding:4px 12px;border-radius:999px}
.timer.low{color:var(--bad);border-color:var(--bad)}
.res{padding:12px 14px;border-radius:9px;margin-top:8px;font-size:.93rem}
.res.ok{background:var(--ok-bg);border-left:4px solid var(--ok)}
.res.bad{background:var(--bad-bg);border-left:4px solid var(--bad)}
.score{font-size:2.4rem;font-weight:700;font-family:Georgia,serif;color:var(--primary)}
.ai-box{margin-top:10px;background:#f3f6fb;border:1px solid #d3deee;border-radius:9px;padding:12px 14px;font-size:.93rem}
.ai-box.err{background:var(--bad-bg);border-color:#e6b9b2}
.ai-box ul{margin:.4em 0 .4em 1.2em;padding:0}
.ai-box .spin{display:inline-block;width:14px;height:14px;border:2px solid #9bb0cf;border-top-color:transparent;border-radius:50%;animation:sp .8s linear infinite;vertical-align:-2px;margin-right:6px}
@keyframes sp{to{transform:rotate(360deg)}}
.split{display:grid;grid-template-columns:260px 1fr;gap:20px}
@media(max-width:820px){.split{grid-template-columns:1fr}}
.list{display:flex;flex-direction:column;gap:6px}
.list button{text-align:left;background:#fff;border:1px solid var(--line);padding:10px 12px;border-radius:9px;cursor:pointer;font:inherit}
.list button.on{border-color:var(--primary);background:#eef2f8}
.list small{display:block;color:var(--muted)}
details.d{border:1px solid var(--line);border-radius:9px;padding:8px 14px;margin:12px 0;background:#fcfbf8}
details.d summary{cursor:pointer;font-weight:600}
.sample{white-space:pre-wrap;font-family:Georgia,serif;line-height:1.7}
.live{display:grid;gap:6px;margin-top:10px;font-size:.92rem}
.live div{padding:6px 10px;border-radius:7px}
.live .ok{background:var(--ok-bg)} .live .warn{background:var(--warn-bg)} .live .bad{background:var(--bad-bg)}
.meter{height:8px;background:#e8e4d9;border-radius:999px;overflow:hidden;margin:6px 0}
.meter i{display:block;height:100%;background:var(--ok);width:0;transition:width .2s}
.bands{display:grid;grid-template-columns:repeat(auto-fit,minmax(130px,1fr));gap:10px;margin:10px 0}
.bands div{background:#fff;border:1px solid var(--line);border-radius:9px;padding:8px 10px;text-align:center}
.bands b{display:block;font-size:1.5rem;font-family:Georgia,serif;color:var(--primary)}
.diff{margin:8px 0;padding:8px 10px;background:#fff;border:1px solid var(--line);border-radius:8px}
.diff del{color:var(--bad);background:var(--bad-bg);text-decoration:line-through;padding:0 3px;border-radius:3px}
.diff ins{color:var(--ok);background:var(--ok-bg);text-decoration:none;padding:0 3px;border-radius:3px}
.bar{display:inline-block;height:10px;background:var(--primary-2);border-radius:3px;vertical-align:middle}
@media print{.top,.foot,.btn{display:none}}

#prov{font:inherit;font-size:.8rem;padding:3px 8px;border-radius:999px;border:0;background:rgba(255,255,255,.18);color:#fff}
#prov option{color:#000}
.cue{background:#fcfbf8;border:1px dashed #c9c4b6;border-radius:10px;padding:12px 16px}
.cue ul{margin:.3em 0 0 1.2em;padding:0}
.big{font:700 2rem Georgia,serif;font-variant-numeric:tabular-nums;color:var(--primary)}
.src{font-size:.82rem;color:var(--muted)}

.hero{position:relative;overflow:hidden}
.hero>*{position:relative;z-index:1}
.hero video.bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0;opacity:0;transition:opacity 1s}
.hero video.bg.on{opacity:.35}
.hero .credit{position:absolute;right:12px;bottom:8px;font-size:.72rem;z-index:1}
.hero .credit a{color:#dbe5f4}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:5px 13px;cursor:pointer;font:inherit;font-size:.88rem}
.chip:hover,.chip.on{background:var(--primary);color:#fff;border-color:var(--primary)}
.vgrid{display:grid;gap:16px;grid-template-columns:repeat(auto-fill,minmax(290px,1fr))}
.vcard{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:var(--shadow)}
.vcard .vf{position:relative;aspect-ratio:16/9;background:#111}
.vcard .vf iframe,.vcard .vf video,.vcard .vf img{position:absolute;inset:0;width:100%;height:100%;border:0;object-fit:cover}
.vcard .play{position:absolute;inset:0;display:grid;place-items:center;background:rgba(0,0,0,.25);border:0;cursor:pointer;color:#fff;font-size:2.4rem;width:100%}
.vcard .vm{padding:10px 12px;font-size:.88rem}
.vcard .vm b{display:block;line-height:1.3;margin-bottom:3px}
.tabs{display:flex;gap:6px;margin-bottom:12px}
.tabs button{border:1px solid var(--line);background:#fff;border-radius:9px;padding:8px 16px;cursor:pointer;font:inherit;font-weight:600}
.tabs button.on{background:var(--primary);color:#fff;border-color:var(--primary)}
/* ---- English Hub ---- */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin-bottom:16px}
.stat{background:#fff;border:1px solid var(--line);border-radius:12px;padding:12px;text-align:center;font-size:.85rem;color:var(--muted)}
.stat b{display:block;font:700 1.7rem Georgia,serif;color:var(--primary)}
.mission{border-left:5px solid var(--accent)}
#toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%) translateY(30px);background:#1d2433;color:#fff;padding:10px 18px;border-radius:999px;opacity:0;transition:.25s;z-index:50;pointer-events:none;font-size:.9rem}
#toast.show{opacity:1;transform:translateX(-50%)}
.chat{height:340px;overflow:auto;border:1px solid var(--line);border-radius:10px;padding:10px;background:#fcfbf8;margin:10px 0}
.msg{max-width:86%;margin:8px 0;padding:9px 13px;border-radius:12px;font-size:.95rem}
.msg.user{margin-left:auto;background:var(--primary);color:#fff}
.msg.assistant{background:#fff;border:1px solid var(--line)}
.msg p{margin:.3em 0}
.fc{text-align:center}.fcfront{font:700 1.6rem Georgia,serif;margin:18px 0;color:var(--primary)}
.chk-list{list-style:none;padding:0}.chk-list li{padding:4px 0}
dl.gl dt{font-weight:700;margin-top:10px;color:var(--primary)}dl.gl dd{margin:0 0 0 0;color:var(--ink)}
.log{background:#101725;color:#cfe3ff;padding:12px;border-radius:8px;max-height:280px;overflow:auto;font-size:.8rem;white-space:pre-wrap}
.chips a.chip{text-decoration:none;color:inherit}
label{font-size:.92rem}