.xt{margin-top:1.5rem}
.xt-intro{border:1px solid var(--color-line,#e3e7ea);border-radius:14px;padding:20px;background:#fff}
.xt-facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px;margin:14px 0 18px}
.xt-facts div{background:var(--color-subtle,#f6f8f9);border-radius:10px;padding:10px 12px}
.xt-facts b{display:block;font-size:1.25rem;color:var(--color-ink,#1c2126)}
.xt-facts span{font-size:.85rem;color:var(--color-muted,#5b6670)}
.xt-start{font-size:1rem;padding:10px 18px}
.xt-best{margin:12px 0 0;font-size:.9rem;color:var(--color-muted,#5b6670)}
.xt-top{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:8px}
.xt-count{font-weight:600}
.xt-time{margin-left:auto;font-variant-numeric:tabular-nums;font-weight:600;color:var(--color-brand-ink,#146c50)}
.xt-time.low{color:#a33a1f}
.xt-bar{height:6px;border-radius:99px;background:var(--color-subtle,#eef1f3);overflow:hidden;margin-bottom:10px}
.xt-bar i{display:block;height:100%;background:var(--color-brand,#177a5a);transition:width 1s linear}
.xt-dots{display:flex;flex-wrap:wrap;gap:6px;list-style:none;margin:0 0 12px;padding:0}
.xt-dots button{width:34px;height:34px;border-radius:50%;border:1px solid var(--color-line,#e3e7ea);background:#fff;font-weight:600;font-size:.85rem;color:var(--color-ink,#1c2126)}
.xt-dots li.tried button{border-color:#e7b55a;background:#fffaf0}
.xt-dots li.ok button{border-color:var(--color-brand,#177a5a);background:var(--color-brand-soft,#e8f4ef);color:var(--color-brand-ink,#146c50)}
.xt-dots li.on button{outline:2px solid var(--color-ink,#1c2126);outline-offset:1px}
.xt-q{border:1px solid #f2d39b;background:#fffaf0;border-radius:12px;padding:14px 16px;margin-bottom:12px}
.xt-qtitle{font-size:1.1rem;font-weight:700;margin:0 0 6px}
.xt-prompt{line-height:1.55}
.xt-prompt code,.xt-hint code,.xt-rbody code{background:#fff;border:1px solid #eadbc0;border-radius:4px;padding:0 4px}
.xt-btns{display:flex;flex-wrap:wrap;gap:6px;margin-top:10px}
.xt-fb{margin:10px 0 0;font-weight:600}
.xt-fb:empty{display:none}
.xt-fb.ok{color:var(--color-brand-ink,#146c50)}
.xt-fb.no{color:#a33a1f}
.xt-hint{margin:8px 0 0;color:var(--color-muted,#5b6670);font-size:.92rem}
.xt-nav{display:flex;justify-content:space-between;margin-top:12px}
.xt-finish{border-color:#a33a1f;color:#a33a1f}
.xt-confirm{position:fixed;inset:auto 16px 16px 16px;max-width:520px;margin:0 auto;background:#fff;border:1px solid var(--color-line,#e3e7ea);border-radius:12px;box-shadow:0 18px 40px rgba(0,0,0,.18);padding:16px;z-index:60}
.xt-confirm p{margin:0}
.xt-score{border:1px solid var(--color-line,#e3e7ea);border-radius:14px;padding:20px;background:#fff;text-align:center}
.xt-big{font-size:1.6rem;font-weight:800;margin:4px 0}
.xt-level{margin:6px 0}
.xt-note{color:var(--color-muted,#5b6670);margin:4px 0}
.xt-score .xt-btns{justify-content:center}
.xt-h{font-size:1.2rem;font-weight:700;margin:28px 0 10px}
.xt-review{list-style:none;padding:0;margin:0;display:grid;gap:10px}
.xt-review li{border:1px solid var(--color-line,#e3e7ea);border-radius:12px;padding:12px 14px;background:#fff}
.xt-rhead{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.xt-mark{font-weight:800}
.xt-review li.ok .xt-mark{color:var(--color-brand,#177a5a)}
.xt-review li.no .xt-mark{color:#a33a1f}
.xt-rstat{margin-left:auto;font-size:.85rem;color:var(--color-muted,#5b6670)}
.xt-rbody{font-size:.92rem;margin-top:4px;color:var(--color-muted,#5b6670)}
.xt-rsol{margin:6px 0 0;font-size:.9rem}
.xt-rsol code{background:var(--color-subtle,#f6f8f9);border-radius:4px;padding:1px 6px;word-break:break-all}
.xt-rlinks{margin:6px 0 0;font-size:.9rem;display:flex;gap:14px;flex-wrap:wrap}
.xt-rlinks a{color:var(--color-brand-ink,#146c50);font-weight:600}
.xt-covers{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:8px;list-style:none;padding:0}
.xt-covers li{border:1px solid var(--color-line,#e3e7ea);border-radius:10px;padding:10px 12px;background:#fff;font-size:.92rem}
.xt-covers b{display:block}