:root{--bg:#f7f4ee;--card:#fff;--ink:#23262f;--mute:#6b7080;--line:#e7e2d8;--red:#ef4b4b;--blue:#1f5fbf;--yel:#e0a800;
--p1:#cfe6fb;--p2:#d8f0d2;--p3:#fde2cf;--p4:#e3dcf7;--p5:#fff1c4;--p6:#fbd9e4;--ok:#2f9e63;--okbg:#e4f5ea;--bad:#d64545;--badbg:#fdeaea;
--r:16px;--sh:0 1px 2px rgba(30,30,40,.05),0 4px 16px rgba(30,30,40,.06);--focus:0 0 0 3px #fff,0 0 0 5px #6b8cff}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.6 system-ui,-apple-system,"PingFang SC","Hiragino Sans","Noto Sans CJK SC","Noto Sans CJK JP",sans-serif;min-height:100vh;display:flex;flex-direction:column}
.wrap{width:100%;max-width:1080px;margin:0 auto;padding:0 20px}
main{flex:1;padding-top:28px;padding-bottom:48px;outline:none}
a{color:inherit}
:focus-visible{outline:none;box-shadow:var(--focus);border-radius:10px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;background:#fff;padding:8px 12px;z-index:9}
svg.i{width:18px;height:18px;flex:none;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.top{position:sticky;top:0;z-index:5;background:rgba(247,244,238,.86);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.top-in{display:flex;align-items:center;gap:16px;height:60px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:700;font-size:17px;letter-spacing:.02em}
.logo{width:30px;height:30px;border-radius:9px;background:var(--red);color:#fff;display:grid;place-items:center;font-size:16px}
.lv-nav{margin-left:auto;display:flex;gap:4px}
.lv-nav a{text-decoration:none;padding:6px 12px;border-radius:999px;font-weight:600;font-size:14px;color:var(--mute)}
.lv-nav a:hover{background:#fff;color:var(--ink)}.lv-nav a[aria-current]{background:var(--ink);color:#fff}
h1{font-size:28px;line-height:1.3;margin:0 0 6px;letter-spacing:.01em}h2{font-size:19px;margin:0 0 14px}
.sub{color:var(--mute);margin:0 0 24px}
.hero{background:linear-gradient(120deg,var(--p1),var(--p4) 55%,var(--p6));border-radius:24px;padding:36px 32px;margin-bottom:32px;position:relative;overflow:hidden}
.hero h1{font-size:32px}.hero p{margin:0;color:#3d4250;max-width:560px}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px}
.chip{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.75);padding:6px 12px;border-radius:999px;font-size:13px;font-weight:600}
.grid{display:grid;gap:14px;grid-template-columns:repeat(auto-fill,minmax(230px,1fr))}
.lvgrid{grid-template-columns:repeat(auto-fill,minmax(220px,1fr));margin-bottom:36px}
.tile{display:block;text-decoration:none;background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px;box-shadow:var(--sh);transition:transform .15s,box-shadow .15s,border-color .15s}
a.tile:hover{transform:translateY(-2px);border-color:#d6cfc2;box-shadow:0 2px 4px rgba(30,30,40,.06),0 10px 28px rgba(30,30,40,.09)}
.tile.off{opacity:.55;box-shadow:none}
.lvtag{font-size:30px;font-weight:800;letter-spacing:.02em}
.tile .meta{color:var(--mute);font-size:13px;margin-top:4px}
.bar{height:6px;background:#eee8dc;border-radius:9px;margin-top:14px;overflow:hidden}.bar i{display:block;height:100%;background:var(--ok);border-radius:9px}
.ltile{display:flex;gap:14px;align-items:center;padding:12px}
.thumb{width:64px;height:64px;border-radius:12px;flex:none;display:grid;place-items:center;overflow:hidden}
.thumb img{max-width:88%;max-height:88%}
.ltile .num{font-size:12px;color:var(--mute);font-weight:600}
.ltile .t{font-weight:700;line-height:1.35;margin-top:2px}
.done{display:inline-flex;align-items:center;gap:4px;color:var(--ok);font-size:12px;font-weight:700;margin-top:4px}
.crumbs{display:flex;align-items:center;gap:6px;color:var(--mute);font-size:14px;margin-bottom:14px}
.crumbs a{text-decoration:none;display:inline-flex;align-items:center;gap:4px}.crumbs a:hover{color:var(--ink)}
.lesson{display:grid;grid-template-columns:minmax(0,360px) minmax(0,1fr);gap:24px;align-items:start}
.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh);padding:18px}
.panel h2{display:flex;align-items:center;gap:8px;font-size:16px}
.video{width:100%;aspect-ratio:9/16;max-height:72vh;background:#111;border-radius:12px;display:block;object-fit:contain}
.stack{display:flex;flex-direction:column;gap:20px}
audio{width:100%;height:40px}
.alabel{font-size:13px;color:var(--mute);margin:12px 0 6px;font-weight:600}
.tabs{display:flex;gap:4px;background:#f1ece2;padding:4px;border-radius:12px;margin-bottom:16px}
.tabs button{flex:1;border:0;background:none;padding:8px 10px;border-radius:9px;font:inherit;font-weight:600;color:var(--mute);cursor:pointer;display:flex;align-items:center;justify-content:center;gap:6px}
.tabs button[aria-selected=true]{background:#fff;color:var(--ink);box-shadow:0 1px 3px rgba(0,0,0,.08)}
.sl{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.sl li{display:flex;gap:12px;align-items:center;padding:10px;border-radius:12px;background:#fbfaf7;border:1px solid #f0ebe2}
.sl .thumb{width:56px;height:56px}
.jp{font-family:"Hiragino Sans","Noto Sans CJK JP",sans-serif;font-weight:700;font-size:17px}
.kana{font-size:12px;color:var(--mute)}.zh{color:var(--blue);font-size:14px;font-weight:600}.en{color:var(--yel);font-size:13px;font-weight:600}
/* spelling */
.sp-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px;font-size:13px;color:var(--mute);font-weight:600}
.dots{display:flex;gap:5px}.dots i{width:22px;height:6px;border-radius:9px;background:#ece6da}.dots i.cur{background:var(--ink)}.dots i.ok{background:var(--ok)}.dots i.bad{background:var(--bad)}
.card{border-radius:18px;padding:22px 20px;display:flex;flex-direction:column;align-items:center;text-align:center;transition:background .2s}
.card .pic{height:200px;display:flex;align-items:center;justify-content:center;margin-bottom:10px}
.card .pic img{max-height:200px;max-width:100%;object-fit:contain;filter:drop-shadow(0 2px 3px rgba(0,0,0,.06))}
.card .mean{font-size:22px;font-weight:800;color:var(--blue)}.card .mean-en{font-size:14px;color:#a37a00;font-weight:600}
.play{display:flex;gap:8px;margin:16px 0 4px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;border:1px solid var(--line);background:#fff;color:var(--ink);font:inherit;font-weight:600;font-size:14px;padding:9px 16px;border-radius:999px;cursor:pointer;transition:background .15s,border-color .15s,transform .05s;min-height:40px}
.btn:hover{border-color:#cfc7b8}.btn:active{transform:scale(.97)}
.btn.pri{background:var(--ink);border-color:var(--ink);color:#fff}.btn.pri:hover{background:#000}
.btn.ghost{background:transparent;border-color:transparent;color:var(--mute)}.btn.ghost:hover{color:var(--ink);background:rgba(0,0,0,.04)}
.btn[disabled]{opacity:.45;cursor:not-allowed}
.btn.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.ans{display:flex;gap:8px;width:100%;max-width:420px;margin-top:14px}
.ans input{flex:1;min-width:0;font:inherit;font-size:20px;padding:10px 14px;border-radius:12px;border:1.5px solid var(--line);background:#fff;font-family:"Hiragino Sans","Noto Sans CJK JP",sans-serif;transition:border-color .15s}
.ans input:focus{outline:none;border-color:#6b8cff;box-shadow:0 0 0 3px rgba(107,140,255,.2)}
.ans input.ok{border-color:var(--ok);background:var(--okbg)}.ans input.bad{border-color:var(--bad);background:var(--badbg)}
.fb{min-height:48px;margin-top:12px;font-size:15px;display:flex;align-items:center;gap:8px;justify-content:center;flex-wrap:wrap}
.fb.ok{color:var(--ok);font-weight:700}.fb.bad{color:var(--bad);font-weight:600}
.fb .jp{color:var(--ink)}
.hint{font-size:12px;color:var(--mute);margin-top:4px}
.row{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin-top:6px}
.score{text-align:center;padding:12px 0}
.ring{width:132px;height:132px;margin:0 auto 12px;position:relative}.ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring b{position:absolute;inset:0;display:grid;place-items:center;font-size:30px}
.miss{list-style:none;padding:0;margin:14px auto;max-width:360px;text-align:left}
.miss li{display:flex;justify-content:space-between;padding:8px 12px;border-bottom:1px solid var(--line)}
.empty{padding:28px;text-align:center;color:var(--mute);border:1.5px dashed var(--line);border-radius:var(--r)}
.foot{border-top:1px solid var(--line);color:var(--mute);font-size:13px;padding:18px 0 calc(18px + env(safe-area-inset-bottom))}
.foot a{text-decoration-color:#ccc}
.sec-h{display:flex;align-items:center;gap:8px;margin:0 0 14px;font-size:19px}
@media (max-width:820px){.lesson{grid-template-columns:minmax(0,1fr)}.video{max-height:64vh;margin:0 auto;width:auto;max-width:100%}}
@media (max-width:560px){.wrap{padding:0 14px}main{padding-top:18px}.hero{padding:24px 20px;border-radius:18px}.hero h1{font-size:25px}h1{font-size:23px}
.brand span:last-child{display:none}.lv-nav a{padding:6px 10px}.card .pic{height:160px}.card .pic img{max-height:160px}.grid{grid-template-columns:1fr}.lvgrid{grid-template-columns:1fr 1fr}}
@media (prefers-reduced-motion:reduce){*{transition:none!important}}
main:focus,main:focus-visible{box-shadow:none}
.panel{min-width:0}