:root{--red:#c8102e;--red2:#9e0c24;--gold:#d9a441;--bg:#faf7f2;--card:#fff;--ink:#1f1f24;--muted:#6b6b76;--line:#ece6dc;--ok:#1f9d55;--bad:#d64545;--r:16px}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.5 system-ui,-apple-system,"Segoe UI",Roboto,"PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif}
a{color:var(--red2)}
.top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 18px;background:var(--red);color:#fff;position:sticky;top:0;z-index:5}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;cursor:pointer}
.logo{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:9px;background:#fff;color:var(--red);font-size:20px}
.countdown{font-size:14px;background:rgba(255,255,255,.16);padding:6px 12px;border-radius:999px;white-space:nowrap}
.countdown b{font-size:17px}
.tabs{display:flex;gap:4px;max-width:880px;margin:14px auto 0;padding:0 14px;overflow-x:auto}
.tabs button{flex:1;min-width:84px;border:0;background:transparent;padding:10px 8px;border-radius:12px;font:inherit;font-weight:600;color:var(--muted);cursor:pointer}
.tabs button.active{background:var(--card);color:var(--red);box-shadow:0 1px 3px rgba(0,0,0,.08)}
main{max-width:880px;margin:0 auto;padding:16px 14px 40px}
.view{display:none}.view.active{display:block}
.hero h1{font-size:clamp(24px,5vw,34px);margin:6px 0}
.hero em{color:var(--red);font-style:normal}
.hero p{color:var(--muted);margin:0 0 18px}
.levels{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px;box-shadow:0 1px 2px rgba(0,0,0,.03)}
.level{cursor:pointer;transition:transform .12s,box-shadow .12s;position:relative}
.level:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(0,0,0,.07)}
.level.selected{border-color:var(--red);box-shadow:0 0 0 2px var(--red) inset}
.level h3{margin:0 0 2px;font-size:20px}
.level .sub{color:var(--muted);font-size:14px}
.level .bigc{position:absolute;right:16px;top:10px;font-size:40px;color:var(--line);font-weight:700}
.level .row{display:flex;gap:8px;margin-top:14px}
.level.locked{background:repeating-linear-gradient(135deg,#fff,#fff 10px,#fbf8f3 10px,#fbf8f3 20px)}
.level.locked h3{color:var(--muted)}
.pro{background:var(--gold);color:#fff;font-size:11px;font-weight:800;padding:2px 7px;border-radius:6px;letter-spacing:.06em;vertical-align:middle}
.meter{height:8px;background:#f1ece4;border-radius:99px;overflow:hidden;margin-top:12px}
.meter i{display:block;height:100%;background:linear-gradient(90deg,var(--red),var(--gold))}
.btn{border:1px solid var(--line);background:#fff;font:inherit;font-weight:600;padding:10px 16px;border-radius:12px;cursor:pointer;color:var(--ink)}
.btn.primary{background:var(--red);border-color:var(--red);color:#fff}
.btn.primary:hover{background:var(--red2)}
.btn:disabled{opacity:.55;cursor:not-allowed}
.btn.sm{padding:7px 12px;font-size:14px}
.signup{margin-top:22px}
.signup h3{margin:0}
.signup form{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.signup input{flex:1;min-width:200px;padding:11px 14px;border:1px solid var(--line);border-radius:12px;font:inherit}
.formMsg{min-height:1.4em;margin:8px 0 0;font-size:14px}
.muted{color:var(--muted)}.small{font-size:13px}
.bar{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:14px;flex-wrap:wrap}
.pill{background:var(--red);color:#fff;border-radius:999px;padding:4px 12px;font-weight:700;font-size:14px}
select{font:inherit;padding:8px 10px;border-radius:10px;border:1px solid var(--line);background:#fff}
.flash{min-height:330px;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;cursor:pointer;user-select:none}
.hz{font-size:clamp(64px,18vw,110px);line-height:1.1;font-family:"Noto Serif SC","Songti SC","STSong",serif}
.py{font-size:24px;color:var(--red2);margin-top:6px}
.en{font-size:18px;margin-top:6px}
.pos{font-size:13px;color:var(--muted)}
.ex{margin-top:14px;padding-top:12px;border-top:1px dashed var(--line);font-size:15px;max-width:560px}
.ex .z{font-size:18px}
.hint{color:var(--muted);font-size:14px;margin-top:16px}
.grades{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin-top:14px}
.grades button{padding:12px 4px;font-size:15px}
.grades small{display:block;font-weight:400;color:var(--muted);font-size:12px}
.g-again{border-color:#f1c4c4!important}.g-easy{border-color:#bfe3cd!important}
.speak{border:0;background:#f6efe5;border-radius:50%;width:40px;height:40px;cursor:pointer;font-size:18px;margin-top:8px}
.q{text-align:center;padding:26px 18px}
.q .prompt{font-size:clamp(40px,12vw,72px);font-family:"Noto Serif SC","Songti SC",serif}
.q .prompt.text{font-size:22px;font-family:inherit}
.q .ask{color:var(--muted);font-size:14px;margin-bottom:6px}
.opts{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:18px}
.opt{padding:14px 10px;border:1px solid var(--line);background:#fff;border-radius:14px;font:inherit;font-size:17px;cursor:pointer;min-height:60px}
.opt.hzopt{font-size:28px}
.opt.right{background:#e8f6ee;border-color:var(--ok);color:#13643a}
.opt.wrong{background:#fdecec;border-color:var(--bad);color:#8a1f1f}
.qtop{display:flex;justify-content:space-between;color:var(--muted);font-size:14px}
.qprog{height:6px;background:#f1ece4;border-radius:9px;margin:8px 0 0;overflow:hidden}.qprog i{display:block;height:100%;background:var(--red)}
.fb{min-height:52px;margin-top:14px;font-size:15px}
.stats{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;margin-bottom:16px}
.stat .n{font-size:28px;font-weight:800}
.stat .l{color:var(--muted);font-size:13px}
table{width:100%;border-collapse:collapse;font-size:15px}
th,td{text-align:left;padding:9px 6px;border-bottom:1px solid var(--line)}
.tag{display:inline-block;font-size:12px;padding:1px 8px;border-radius:999px;background:#f6efe5;margin:2px}
.modal{position:fixed;inset:0;background:rgba(20,10,10,.45);display:grid;place-items:center;z-index:20;padding:16px}
.modal[hidden]{display:none}
.modalBox{background:#fff;border-radius:20px;padding:24px;max-width:420px;width:100%;position:relative}
.x{position:absolute;right:12px;top:8px;border:0;background:none;font-size:28px;cursor:pointer;color:var(--muted)}
.ticks{padding-left:0;list-style:none}.ticks li{padding:4px 0 4px 26px;position:relative}.ticks li:before{content:"✓";position:absolute;left:4px;color:var(--ok);font-weight:800}
.done{text-align:center;padding:30px 16px}
.done .big{font-size:48px}
.foot{max-width:880px;margin:0 auto;padding:10px 16px 30px;color:var(--muted);font-size:12px;text-align:center}
@media (max-width:520px){
  .top{padding:10px 12px}.bname{font-size:15px;white-space:nowrap}
  .countdown{font-size:12px;padding:5px 9px}.cdl{display:none}.countdown b{font-size:14px}
  .tabs button{min-width:0;padding:9px 4px;font-size:14px}
  .grades button{font-size:14px;padding:10px 2px}
  .opts{grid-template-columns:1fr}
}