:root{--teal:#064D6A;--teal-2:#0A6C8F;--teal-light:#DCEBEF;--cream:#F8F6F0;--paper:#FFFFFF;--red:#B9342B;--ink:#1B2A33;--muted:#5B6B73;--ok:#1F7A4D;--warn:#8A5A00;--line:#D9D4C7;--radius:14px}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--cream);color:var(--ink);font-family:Noto Sans SC,PingFang SC,Microsoft YaHei,Segoe UI,system-ui,-apple-system,Roboto,sans-serif;line-height:1.65;font-size:16px}h1,h2,h3,h4{color:var(--teal);line-height:1.4;margin:.2em 0 .5em}h1{font-size:1.7rem}h2{font-size:1.35rem}h3{font-size:1.1rem}a{color:var(--teal-2)}code{background:var(--teal-light);padding:1px 6px;border-radius:6px;font-size:.9em;word-break:break-all}.muted{color:var(--muted)}.small{font-size:.85rem}.red{color:var(--red)}.warn{color:var(--warn)}.hanzi{font-size:1.6rem;font-weight:600;line-height:1.6}.py{font-size:1.15rem;color:var(--teal);line-height:1.8;padding-top:2px}.container{max-width:1040px;margin:0 auto;padding:16px 14px 48px}.topbar{position:sticky;top:0;z-index:20;background:var(--teal);color:#fff;display:flex;align-items:center;gap:12px;padding:8px 14px;flex-wrap:wrap}.brand{display:flex;align-items:center;background:var(--cream);border-radius:10px;padding:4px 10px;text-decoration:none}.wordmark{display:flex;flex-direction:column;line-height:1.15;color:var(--teal)}.wordmark b{font-size:1.35rem}.wordmark small{font-size:.62rem;letter-spacing:.06em}.topbar nav{display:flex;gap:2px;margin-left:auto;flex-wrap:wrap}.topbar nav a{color:#e6f2f5;text-decoration:none;padding:8px 11px;border-radius:8px;font-size:.92rem;white-space:nowrap}.topbar nav a.active,.topbar nav a:hover{background:#fff;color:var(--teal)}.menu-btn{display:none;margin-left:auto;background:transparent;color:#fff;border:1px solid #ffffff88;border-radius:8px;padding:8px 12px;font-size:1rem}@media (max-width: 860px){.menu-btn{display:block}.topbar nav{display:none;width:100%;flex-direction:column;margin:0}.topbar nav.open{display:flex}.topbar nav a{padding:12px}h1{font-size:1.45rem}}.footer{text-align:center;color:var(--muted);font-size:.8rem;padding:20px 14px}.page-title{margin:6px 0 14px}.page-title p{margin:0}.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;margin:0 0 14px}.hero{background:linear-gradient(135deg,var(--teal),var(--teal-2));color:#fff;border-radius:18px;padding:24px 20px;margin-bottom:14px}.hero h1{color:#fff;font-size:1.9rem}.hero p{max-width:60ch}.grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:14px;margin-bottom:14px}.grid3 .card{margin:0}.link-card{text-decoration:none;color:inherit}.link-card:hover{border-color:var(--teal-2);box-shadow:0 2px 10px #064d6a22}.big{font-size:2.2rem;font-weight:700;color:var(--teal);margin:0;line-height:1.3}.big small{font-size:1rem;color:var(--muted)}.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin:10px 0}.btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid var(--teal);background:#fff;color:var(--teal);padding:9px 14px;border-radius:10px;font:inherit;cursor:pointer;text-decoration:none;display:inline-block;min-height:42px}.btn:hover:not(:disabled){background:var(--teal-light)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn.primary{background:var(--red);border-color:var(--red);color:#fff}.btn.primary:hover:not(:disabled){background:#9b2a22}.btn.ghost{border-color:var(--line);color:var(--muted)}.btn.ok{background:#e5f4ec;border-color:var(--ok);color:var(--ok)}.btn.danger{border-color:var(--red);color:var(--red)}.btn.small{min-height:34px;padding:5px 10px;font-size:.85rem}.btn:focus-visible,.chip:focus-visible,.opt:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #F2A900;outline-offset:2px}.speak-wrap{display:inline-flex;flex-direction:column;gap:2px;margin:3px 6px 3px 0;vertical-align:top}.speak{background:var(--teal-light);border-color:transparent}.speak-msg{color:var(--red);font-size:.78rem;max-width:240px}.chips{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0}.chip{border:1px solid var(--line);background:#fff;border-radius:999px;padding:6px 14px;min-height:38px;font:inherit;cursor:pointer;color:var(--ink)}.chip.big{font-size:1.25rem;padding:6px 18px;min-width:56px}.chip.on{background:var(--teal);color:#fff;border-color:var(--teal)}.chip.rare{border-style:dashed}.tabs{display:flex;gap:6px;flex-wrap:wrap;margin:6px 0 14px}.tab{border:1px solid var(--line);background:#fff;border-radius:10px;padding:9px 14px;font:inherit;cursor:pointer}.tab.on{background:var(--teal);border-color:var(--teal);color:#fff}.filters{display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:10px;align-items:end}.filters label,.inline{display:flex;flex-direction:column;font-size:.85rem;color:var(--muted);gap:4px}.inline{flex-direction:row;align-items:center;gap:8px;margin-top:12px}input,select{font:inherit;padding:9px 10px;border:1px solid var(--line);border-radius:10px;background:#fff;color:var(--ink);min-height:42px;max-width:100%}.table-layout{display:block}.table-layout.has-detail{display:grid;grid-template-columns:1fr 340px;gap:14px;align-items:start}.sticky{position:sticky;top:72px}.detail{position:relative}.close{position:absolute;right:10px;top:10px}@media (max-width: 860px){.table-layout.has-detail{grid-template-columns:1fr}.table-layout.has-detail aside{order:-1;position:sticky;top:56px;z-index:5;max-height:75vh;overflow:auto;box-shadow:0 6px 20px #0003}}.tone-row{display:flex;align-items:center;flex-wrap:wrap;gap:8px}.tone-btns{margin:10px 0}.tone-card{text-align:center}.tone-img,.tone-svg{width:100%;max-width:200px;height:auto;margin:0 auto;display:block;color:var(--teal)}.tone-card p{text-align:left}.compare{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.compare small{color:var(--muted);display:block}.arrow{font-size:1.6rem;color:var(--teal-2)}.matrix{border-collapse:collapse;width:100%;min-width:480px}.matrix th,.matrix td{border:1px solid var(--line);padding:4px;text-align:center}.matrix th{background:var(--teal-light);font-size:.85rem}.cell{width:100%;border:0;background:transparent;cursor:pointer;padding:6px 2px;display:flex;flex-direction:column;align-items:center;font:inherit;color:inherit;min-height:64px}.cell .hanzi{font-size:1.25rem}.cell .py{font-size:.9rem}.cell.on,.cell:hover{background:var(--teal-light)}.scroll{overflow-x:auto}.combo-ex{padding:6px 0;border-top:1px dashed var(--line)}.combo-ex:first-of-type{border-top:0}.badge{background:#fff1d6;color:var(--warn);border-radius:999px;padding:2px 10px;font-size:.8rem;margin:0 6px}.plain{list-style:none;padding:0;margin:0}.plain li{padding:8px 0;border-top:1px solid var(--line)}.plain li:first-child{border-top:0}.tts-banner{display:flex;flex-wrap:wrap;gap:8px 14px;align-items:center;background:var(--teal-light);border-radius:12px;padding:8px 14px;margin:0 0 14px;font-size:.9rem}.tts-banner p{margin:0;flex-basis:100%}.tts-banner.warn{background:#fff1d6;color:#5c3d00}.bar{height:10px;background:#e8e4d8;border-radius:99px;overflow:hidden;flex:1;min-width:80px}.bar i{display:block;height:100%;background:var(--teal-2);border-radius:99px}.catrow{display:grid;grid-template-columns:minmax(110px,1.2fr) 2fr minmax(70px,auto);gap:10px;align-items:center;padding:5px 0}@media (max-width:520px){.catrow{grid-template-columns:1fr;gap:2px}}.runbar{display:flex;gap:12px;align-items:center;margin-bottom:10px;flex-wrap:wrap}.runbar .bar{flex:1 1 120px}.question h2{font-size:1.3rem;color:var(--ink)}.options{display:grid;gap:10px;margin:14px 0}.opt{text-align:left;border:2px solid var(--line);background:#fff;border-radius:12px;padding:12px 14px;font:inherit;cursor:pointer;min-height:48px;color:var(--ink)}.opt:hover:not(:disabled){border-color:var(--teal-2)}.opt.sel{border-color:var(--teal);background:var(--teal-light)}.opt.right{border-color:var(--ok);background:#e5f4ec}.opt.wrong{border-color:var(--red);background:#fbe7e5}.opt:disabled{cursor:default}.feedback{border-radius:12px;padding:10px 14px;margin:10px 0;background:var(--teal-light)}.feedback.ok{background:#e5f4ec}.feedback.bad{background:#fbe7e5}.feedback p{margin:.3em 0 0}.score{text-align:center}.rv summary{cursor:pointer}.rv .st{font-size:.8rem;font-weight:700;padding:2px 8px;border-radius:99px;background:#eee;margin-right:6px}.rv.correct .st{background:#e5f4ec;color:var(--ok)}.rv.incorrect .st{background:#fbe7e5;color:var(--red)}.sticky-cta{position:sticky;bottom:8px;box-shadow:0 4px 18px #0002}.video{width:100%;max-width:560px;border-radius:12px;background:#000}.video-missing{background:#f1eee4;border:1px dashed var(--line);border-radius:12px;padding:14px;color:var(--muted);font-size:.9rem}.video-missing{margin-bottom:10px}.try label{display:flex;flex-direction:column;gap:4px;font-size:.85rem;color:var(--muted)}details summary{cursor:pointer}@media (prefers-reduced-motion: reduce){*{transition:none!important;animation:none!important}}