:root{--blue:#2155CD;--blue2:#163D99;--bg:#F5F7FB;--card:#fff;--text:#172033;--muted:#6B7280;--line:#E5E7EB;--good:#0F9D58;--warn:#D97706;--bad:#D93025;--shadow:0 10px 30px rgba(29,53,87,.08)}
*{box-sizing:border-box}html,body{margin:0;padding:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif}body{min-height:100vh}.app{max-width:560px;margin:0 auto;min-height:100vh;padding-bottom:82px}.topbar{position:sticky;top:0;z-index:10;background:rgba(245,247,251,.92);backdrop-filter:blur(12px);padding:18px 18px 10px;display:flex;justify-content:space-between;align-items:center}.brand{font-weight:800;font-size:21px}.route{font-size:12px;font-weight:700;color:var(--blue);background:#EAF0FF;padding:7px 10px;border-radius:999px}.page{padding:8px 18px 30px}.card{background:var(--card);border-radius:22px;padding:20px;box-shadow:var(--shadow);margin:14px 0;border:1px solid rgba(229,231,235,.75)}.hero{background:linear-gradient(135deg,#2155CD,#5B7DEA);color:white}.hero .muted{color:rgba(255,255,255,.78)}.date{font-size:13px;opacity:.9}.day{font-size:28px;font-weight:850;margin:8px 0}.stats{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:18px}.stat{background:rgba(255,255,255,.14);border-radius:16px;padding:12px;text-align:center}.stat b{display:block;font-size:21px}.stat span{font-size:12px;opacity:.85}.primary,.secondary,.ghost,.rate,.choice{border:0;border-radius:16px;padding:15px 18px;font-size:16px;font-weight:750;cursor:pointer}.primary{width:100%;background:var(--blue);color:white;box-shadow:0 8px 20px rgba(33,85,205,.25)}.hero .primary{background:white;color:var(--blue);box-shadow:none;margin-top:18px}.secondary{width:100%;background:#EAF0FF;color:var(--blue)}.ghost{background:#F3F4F6;color:#374151}.section-title{font-size:16px;font-weight:800;margin:26px 4px 8px}.row{display:flex;gap:10px;align-items:center}.row>*{flex:1}.muted{color:var(--muted)}.notice{display:flex;gap:13px;align-items:flex-start}.notice .icon{font-size:22px}.nav{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:min(560px,100%);display:grid;grid-template-columns:repeat(4,1fr);background:rgba(255,255,255,.96);border-top:1px solid var(--line);padding:8px 8px max(8px,env(safe-area-inset-bottom));z-index:20}.nav button{border:0;background:none;color:#747B89;font-size:12px;padding:8px 4px}.nav button.active{color:var(--blue);font-weight:800}.nav .ico{font-size:22px;display:block;margin-bottom:2px}.practice-card{min-height:430px;display:flex;flex-direction:column;justify-content:space-between}.progressbar{height:8px;background:#E8ECF4;border-radius:999px;overflow:hidden}.progressbar i{display:block;height:100%;background:var(--blue);width:0}.prompt{text-align:center;padding:32px 0 18px}.word{font-size:44px;font-weight:850;letter-spacing:.3px;word-break:break-word}.pos{font-size:15px;color:var(--muted);margin-top:10px}.instruction{font-size:17px;margin-top:22px}.input-wrap{display:flex;gap:8px;margin-top:24px}.answer-input{flex:1;min-width:0;border:1.5px solid #D7DCE5;border-radius:16px;padding:14px;font-size:17px;outline:none}.answer-input:focus{border-color:var(--blue);box-shadow:0 0 0 3px #EAF0FF}.mic{flex:0 0 54px;border:0;border-radius:16px;background:#EEF2FF;font-size:22px;color:var(--blue)}.answer-box{background:#F7F9FD;border-radius:18px;padding:16px;margin-top:20px}.answer-box h3{margin:0 0 8px;font-size:22px}.answer-box p{margin:8px 0;line-height:1.55}.judge{font-weight:800;margin-bottom:10px}.judge.ok{color:var(--good)}.judge.no{color:var(--bad)}.rates{display:grid;grid-template-columns:repeat(4,1fr);gap:7px;margin-top:14px}.rate{padding:12px 5px;font-size:13px}.rate.bad{background:#FDECEC;color:var(--bad)}.rate.blur{background:#FFF3DE;color:var(--warn)}.rate.good{background:#E9F7EF;color:var(--good)}.rate.easy{background:#EAF0FF;color:var(--blue)}.choice-list{display:grid;gap:10px;margin-top:18px}.choice{width:100%;text-align:left;background:#F3F5F9;color:#20283A}.choice.selected{outline:2px solid var(--blue);background:#EEF3FF}.hidden{display:none!important}.list-item{padding:14px 0;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:12px}.list-item:last-child{border-bottom:0}.pill{display:inline-block;border-radius:999px;background:#F1F5F9;padding:5px 9px;font-size:12px;color:#475569}.big-num{font-size:34px;font-weight:850}.grid2{display:grid;grid-template-columns:1fr 1fr;gap:12px}.mini{padding:16px}.mini b{display:block;font-size:23px}.settings button,.file-label{display:block;width:100%;margin:9px 0;text-align:center}.file-label{background:#F3F4F6;border-radius:16px;padding:14px;font-weight:750;cursor:pointer}.footer-note{text-align:center;color:var(--muted);font-size:12px;padding:18px}.toast{position:fixed;left:50%;bottom:92px;transform:translateX(-50%);background:#111827;color:white;padding:11px 16px;border-radius:999px;font-size:13px;z-index:99;opacity:0;pointer-events:none;transition:.25s}.toast.show{opacity:1}.speak-state{font-size:12px;color:var(--blue);text-align:center;margin-top:7px}.top-actions{display:flex;gap:8px}.small-btn{border:0;background:#EEF2FF;color:var(--blue);border-radius:12px;padding:9px 11px;font-weight:700}.empty{text-align:center;padding:45px 12px;color:var(--muted)}
@media(max-width:380px){.word{font-size:38px}.stats{gap:7px}.stat{padding:10px 6px}.rates{grid-template-columns:repeat(2,1fr)}}