:root{
  --bg:#f6f3ec;
  --paper:#ffffff;
  --ink:#1c2733;
  --ink-2:#4a5866;
  --line:#e3ddd0;
  --brand:#16697a;
  --brand-ink:#0d4955;
  --brand-soft:#e0f0f2;
  --think:#d98a1c;
  --think-soft:#fbf0dc;
  --rec:#d1432f;
  --rec-soft:#fbe6e1;
  --ok:#2e7d4f;
  --ok-soft:#e1f2e8;
  --radius:14px;
  --shadow:0 1px 2px rgba(28,39,51,.06),0 6px 20px rgba(28,39,51,.06);
  --font:ui-sans-serif,system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
}
@media (prefers-color-scheme:dark){
  :root:not([data-theme="light"]){
    --bg:#12181f;--paper:#1b242e;--ink:#eef2f6;--ink-2:#a9b6c3;--line:#2c3947;
    --brand:#4cc0d2;--brand-ink:#9be0ec;--brand-soft:#173842;
    --think:#f0b04a;--think-soft:#3a2d15;
    --rec:#ff7a66;--rec-soft:#412019;
    --ok:#6fd49a;--ok-soft:#173326;
    --shadow:0 1px 2px rgba(0,0,0,.3),0 6px 20px rgba(0,0,0,.25);
  }
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.55 var(--font);min-height:100vh;display:flex;flex-direction:column}
button{font:inherit;color:inherit;cursor:pointer}
button:focus-visible,a:focus-visible,select:focus-visible{outline:3px solid var(--brand);outline-offset:2px}

.top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px max(16px,calc((100vw - 1120px)/2));background:var(--paper);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}
.brand{display:flex;align-items:center;gap:10px;background:none;border:0;padding:4px;border-radius:10px}
.brand-mark{display:grid;place-items:center;width:36px;height:36px;border-radius:10px;background:var(--brand);color:#fff}
.brand-text{font-weight:700;font-size:17px;letter-spacing:.1px}
.brand-text small{font-weight:500;color:var(--ink-2);font-size:14px;margin-left:4px}
.top-right{display:flex;gap:8px;align-items:center;font-size:14px;color:var(--ink-2)}
.pill{white-space:nowrap;display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:999px;background:var(--brand-soft);color:var(--brand-ink);font-weight:600;font-size:13px}
.pill.exam{background:var(--rec-soft);color:var(--rec)}

main{flex:1;width:100%;max-width:1120px;margin:0 auto;padding:24px 16px 40px}
.foot{padding:20px 16px 32px;text-align:center;color:var(--ink-2);font-size:13px;line-height:1.7;max-width:820px;margin:0 auto}

h1{font-size:clamp(28px,5vw,40px);line-height:1.15;margin:0 0 10px;letter-spacing:-.5px}
h2{font-size:20px;margin:0 0 12px}
.lead{color:var(--ink-2);font-size:17px;max-width:62ch;margin:0 0 24px}
.zh{color:var(--ink-2)}

/* ---------- home ---------- */
.hero{padding:12px 0 8px}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:760px){.grid2{grid-template-columns:1fr}}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:20px}
.section{margin-top:28px}
.section h2 small{font-weight:500;color:var(--ink-2);font-size:15px;margin-left:6px}

.choice{display:block;width:100%;text-align:left;background:var(--paper);border:2px solid var(--line);border-radius:var(--radius);padding:16px 18px;transition:border-color .15s,background .15s}
.choice:hover{border-color:var(--brand)}
.choice[aria-pressed="true"]{border-color:var(--brand);background:var(--brand-soft)}
.choice .t{font-weight:700;font-size:18px;display:flex;justify-content:space-between;gap:8px;align-items:center}
.choice .s{color:var(--ink-2);font-size:14.5px;margin-top:2px}
.choice .meta{margin-top:10px;display:flex;gap:8px;flex-wrap:wrap}
.chip{display:inline-block;font-size:12.5px;padding:2px 9px;border-radius:999px;border:1px solid var(--line);color:var(--ink-2);background:var(--bg)}
.tick{width:22px;height:22px;border-radius:50%;border:2px solid var(--line);flex:none;display:grid;place-items:center;color:transparent;font-size:13px}
.choice[aria-pressed="true"] .tick{background:var(--brand);border-color:var(--brand);color:#fff}

.flow{display:flex;flex-wrap:wrap;gap:10px;margin:0;padding:0;list-style:none;counter-reset:s}
.flow li{counter-increment:s;display:flex;gap:10px;align-items:center;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:10px 14px;font-size:15px}
.flow li::before{content:counter(s);display:grid;place-items:center;width:24px;height:24px;border-radius:50%;background:var(--brand);color:#fff;font-weight:700;font-size:13px;flex:none}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:12px;border:2px solid transparent;font-weight:700;font-size:16px;transition:transform .05s,background .15s,opacity .15s}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-ink)}
.btn-rec{background:var(--rec);color:#fff}
.btn-ghost{background:var(--paper);border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand)}
.btn[disabled]{opacity:.45;cursor:not-allowed}
.btn-lg{padding:15px 30px;font-size:18px}
.btn-sm{padding:7px 12px;font-size:14px;border-radius:9px}

.mic{display:flex;gap:16px;align-items:center;flex-wrap:wrap}
.meter{flex:1;min-width:160px;height:12px;border-radius:999px;background:var(--line);overflow:hidden}
.meter>i{display:block;height:100%;width:0;background:var(--ok);border-radius:999px;transition:width .06s linear}
.note{font-size:14px;color:var(--ink-2);margin:8px 0 0}
.note.err{color:var(--rec)}
.note.good{color:var(--ok)}

/* ---------- task ---------- */
.progress{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.progress .bar{flex:1;height:8px;border-radius:999px;background:var(--line);overflow:hidden}
.progress .bar>i{display:block;height:100%;background:var(--brand);border-radius:999px;transition:width .3s}
.progress .lbl{font-weight:700;white-space:nowrap}
.chips{display:flex;gap:6px;flex-wrap:wrap;margin-bottom:18px}
.dot{min-width:36px;height:36px;padding:0 8px;border-radius:10px;border:2px solid var(--line);background:var(--paper);font-weight:700;font-size:14px;color:var(--ink-2)}
.dot[aria-current="true"]{border-color:var(--brand);background:var(--brand);color:#fff}
.dot.done:not([aria-current="true"]){border-color:var(--ok);background:var(--ok-soft);color:var(--ok)}
.dot[disabled]{opacity:.5;cursor:not-allowed}

.task{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,1fr);gap:20px;align-items:start}
.left{position:sticky;top:84px;display:flex;flex-direction:column;gap:14px}
.right{display:flex;flex-direction:column;gap:14px}
@media (max-width:900px){
  .task{display:flex;flex-direction:column;gap:14px}
  .left,.right{display:contents}
  .pic{order:1}.right>*{order:2}.rec{order:3}.nav{order:4}
  .left .nav{margin-top:0}
}
.pic{order:0;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);position:relative;padding:0;display:block;width:100%}
.pic img{display:block;width:100%;height:auto}
.pic .zoom{position:absolute;right:10px;bottom:10px;background:rgba(28,39,51,.78);color:#fff;font-size:12.5px;padding:4px 10px;border-radius:999px}
.folder{font-size:13px;font-weight:700;letter-spacing:.6px;text-transform:uppercase;color:var(--brand-ink)}
.taskhead h1{font-size:clamp(22px,3.4vw,28px);margin:2px 0 0}
.taskhead .lv{margin-top:6px;display:flex;gap:8px;flex-wrap:wrap}

.say{border-radius:var(--radius);padding:14px 16px;border:1px solid var(--line);background:var(--paper)}
.say .who{display:flex;align-items:center;justify-content:space-between;gap:8px;font-size:12.5px;font-weight:700;text-transform:uppercase;letter-spacing:.6px;color:var(--ink-2);margin-bottom:4px}
.say p{margin:0;font-size:17px}
.say.bg{background:var(--bg);border-style:dashed}
.say.leo{background:var(--brand-soft);border-color:transparent}
.say.leo .who{color:var(--brand-ink)}
.say.you{border:2px solid var(--think);background:var(--think-soft)}
.say.you .who{color:var(--think)}
.say.you p{font-weight:600;font-size:19px}
.say.leo p{font-style:italic}
.listen{background:none;border:1px solid currentColor;border-radius:999px;padding:2px 10px;font-size:12px;font-weight:700;text-transform:none;letter-spacing:0;color:inherit}
.listen:hover{background:rgba(0,0,0,.06)}

/* ---------- recorder ---------- */
.rec{background:var(--paper);border:2px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.rec[data-state="prep"]{border-color:var(--think)}
.rec[data-state="record"]{border-color:var(--rec)}
.rec[data-state="done"]{border-color:var(--ok)}
.rec-row{display:flex;gap:18px;align-items:center;flex-wrap:wrap}
.ring{position:relative;width:128px;height:128px;flex:none}
.ring svg{width:100%;height:100%;transform:rotate(-90deg)}
.ring .tr{fill:none;stroke:var(--line);stroke-width:10}
.ring .pg{fill:none;stroke:var(--line);stroke-width:10;stroke-linecap:round;stroke-dasharray:326.7;stroke-dashoffset:0;transition:stroke .2s}
.rec[data-state="prep"] .pg{stroke:var(--think)}
.rec[data-state="record"] .pg{stroke:var(--rec)}
.rec[data-state="done"] .pg{stroke:var(--ok)}
.ring .num{position:absolute;inset:0;display:grid;place-items:center;text-align:center;line-height:1.1}
.ring .num b{font-size:34px;font-variant-numeric:tabular-nums}
.ring .num span{display:block;font-size:12px;font-weight:700;letter-spacing:.5px;text-transform:uppercase;color:var(--ink-2);margin-top:2px}
.rec[data-state="record"] .ring{animation:pulse 1.2s ease-in-out infinite}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.035)}}
@media (prefers-reduced-motion:reduce){.rec[data-state="record"] .ring{animation:none}.progress .bar>i{transition:none}}
.rec-main{flex:1;min-width:220px}
.rec-title{font-weight:800;font-size:19px;margin:0 0 2px}
.rec-sub{margin:0 0 12px;color:var(--ink-2);font-size:15px}
.actions{display:flex;gap:8px;flex-wrap:wrap}
audio{width:100%;margin-top:12px;height:40px}
.nav{display:flex;justify-content:space-between;gap:10px;margin-top:6px;flex-wrap:wrap}

/* ---------- results ---------- */
.rtable{display:flex;flex-direction:column;gap:10px;margin-top:16px}
.rrow{display:grid;grid-template-columns:44px minmax(0,1fr) minmax(200px,1.1fr) auto;gap:12px;align-items:center;background:var(--paper);border:1px solid var(--line);border-radius:12px;padding:10px 14px}
@media (max-width:760px){.rrow{grid-template-columns:36px 1fr;}.rrow audio,.rrow .na{grid-column:1/-1}.rrow .rb{grid-column:1/-1}}
.rrow .n{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;font-weight:800;background:var(--brand-soft);color:var(--brand-ink)}
.rrow .q{font-size:14.5px}
.rrow audio{margin:0;height:36px}
.rrow .na{color:var(--ink-2);font-size:14px}
.rrow .rb{display:flex;gap:6px}

/* ---------- lightbox ---------- */
.lightbox{position:fixed;inset:0;background:rgba(10,15,20,.88);z-index:50;display:grid;place-items:center;padding:20px}
.lightbox[hidden]{display:none}
.lightbox img{max-width:100%;max-height:100%;background:#fff;border-radius:10px}
.lb-close{position:absolute;top:14px;right:18px;width:44px;height:44px;border-radius:50%;border:0;background:#fff;color:#111;font-size:28px;line-height:1}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

@media (max-width:480px){
  .brand-text small{display:none}
  .top-right>span:not(.pill){display:none}
}

/* ---------- upload status + form fields ---------- */
.st{display:inline-flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:13.5px;font-weight:600;color:var(--ink-2)}
.st.ok{color:var(--ok)}
.st.bad{color:var(--rec)}
.stl{margin-top:4px}
.field{margin-bottom:12px}
.field label{display:block;font-weight:700;margin-bottom:4px}
.field input{width:100%;max-width:420px;padding:11px 14px;border-radius:10px;border:2px solid var(--line);background:var(--bg);color:var(--ink);font:inherit}
.field input:focus{outline:none;border-color:var(--brand)}

/* ---------- voice clip buttons + mic picker ---------- */
.clipbtn{display:inline-flex;align-items:center;gap:8px;background:var(--brand);color:#fff;border:0;border-radius:999px;padding:6px 14px;font-weight:700;font-size:14px;white-space:nowrap}
.clipbtn:hover{background:var(--brand-ink)}
.clipbtn.on{background:var(--rec)}
.clipbtn.big{padding:11px 22px;font-size:16px}
.say.row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:12px 16px}
.say.row .who{margin:0}
.say.you .clipbtn{background:var(--think)}
.say.you .clipbtn.on{background:var(--rec)}
.micpick{margin:12px 0 0}
.micpick select{width:100%;max-width:520px;padding:9px 12px;border-radius:10px;border:2px solid var(--line);background:var(--bg);color:var(--ink);font:inherit}