:root{
  --desk:#E6EAEC; --paper:#FFFFFF; --ink:#18232B; --muted:#55626C; --line:#D3DADF;
  --brand:#1F4E5F; --brand-soft:#E3EEF1; --accent:#B4581F; --accent-soft:#FBEDE3; --bad:#A3281F;
  --r-s:6px; --r-l:14px;
  --serif:"Noto Serif TC",serif; --sans:"Noto Sans TC","PingFang TC","Microsoft JhengHei",sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--desk);color:var(--ink);font:400 17px/1.8 var(--sans);letter-spacing:.02em;
  background-image:radial-gradient(circle at 1px 1px,color-mix(in oklch,var(--brand) 10%,transparent) 1px,transparent 0);background-size:22px 22px}
.skip{position:absolute;left:-999px}.skip:focus{left:12px;top:12px;z-index:9;background:var(--paper);padding:6px 10px}
.bar{position:sticky;top:0;z-index:5;background:color-mix(in oklch,var(--desk) 88%,transparent);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.bar-in{max-width:760px;margin:0 auto;padding:10px 18px;display:flex;align-items:center;gap:14px;justify-content:space-between}
.brand{font:700 15px/1 var(--serif);letter-spacing:.08em;color:var(--brand)}
.rail{display:flex;gap:4px;margin:0;padding:0;list-style:none}
.rail li{width:22px;height:6px;border-radius:3px;background:var(--line);transition:background-color .3s}
.rail li.done{background:var(--brand)}
.rail li.now{background:var(--accent)}
.sheet{max-width:760px;margin:18px auto 60px;padding:clamp(20px,5vw,44px);background:var(--paper);border-radius:var(--r-l);
  box-shadow:0 1px 2px rgba(24,35,43,.06),0 12px 32px -12px rgba(31,78,95,.22);outline:none}
@media (max-width:560px){.sheet{margin:0 0 40px;border-radius:0;min-height:calc(100vh - 47px)}}
.folio{display:flex;justify-content:space-between;align-items:baseline;gap:12px;color:var(--muted);font-size:14px;border-bottom:1px solid var(--line);padding-bottom:10px;margin-bottom:18px}
.folio b{font:700 13px/1 var(--sans);letter-spacing:.1em;color:var(--brand);background:var(--brand-soft);padding:5px 8px;border-radius:4px}
h1,h2{font-family:var(--serif);line-height:1.4;margin:0 0 10px;letter-spacing:.04em}
h1{font-size:clamp(26px,5vw,34px)}
h2{font-size:22px}
h3{font-size:17px;margin:28px 0 8px}
p{margin:0 0 12px}
.lead{color:var(--muted)}
.task{background:var(--brand-soft);border-left:4px solid var(--brand);padding:12px 14px;border-radius:0 var(--r-s) var(--r-s) 0;margin:12px 0 18px}
.content{white-space:pre-wrap;border:1px solid var(--line);border-radius:var(--r-s);padding:16px 18px;font-size:16.5px;line-height:1.9;background:#FBFCFC;margin:0 0 6px}
.content::before{content:"閱讀內容";display:block;font-size:12px;letter-spacing:.15em;color:var(--muted);margin-bottom:6px}
.anchors{display:flex;flex-wrap:wrap;gap:4px 14px;font-size:13px;color:var(--muted);margin:6px 0 4px}
.likert{border:0;margin:0;padding:14px 0;border-bottom:1px dashed var(--line)}
.likert legend{padding:0;margin-bottom:8px;font-weight:500}
.scale{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}
.scale label{position:relative}
.scale input{position:absolute;opacity:0;inset:0}
.scale span{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:52px;border:1.5px solid var(--line);border-radius:var(--r-s);
  font:700 18px/1.1 var(--sans);cursor:pointer;transition:background-color .15s,border-color .15s,color .15s,transform .15s}
.scale span small{font:400 11px/1.2 var(--sans);color:var(--muted);margin-top:3px;letter-spacing:0}
.scale input:checked+span{background:var(--accent);border-color:var(--accent);color:#fff;transform:scale(1.04)}
.scale input:checked+span small{color:#fff}
.scale input:focus-visible+span,.opt input:focus-visible+span{outline:3px solid var(--brand);outline-offset:2px}
.opt{display:block;position:relative;margin:6px 0}
.opt input{position:absolute;opacity:0}
.opt span{display:flex;gap:10px;align-items:flex-start;padding:12px 14px;min-height:48px;border:1.5px solid var(--line);border-radius:var(--r-s);cursor:pointer;transition:background-color .15s,border-color .15s}
.opt span i{font-style:normal;font-weight:700;color:var(--brand);min-width:1.3em}
.opt input:checked+span{border-color:var(--accent);background:var(--accent-soft)}
.q{margin-top:22px}
label.field{display:block;font-weight:500;margin:14px 0 6px}
input[type=text],textarea{width:100%;font:400 17px/1.6 var(--sans);padding:12px 14px;border:1.5px solid var(--line);border-radius:var(--r-s);background:#fff;color:var(--ink)}
input[type=text]:focus,textarea:focus{outline:3px solid color-mix(in oklch,var(--brand) 35%,transparent);border-color:var(--brand)}
textarea{min-height:84px;resize:vertical}
.actions{display:flex;justify-content:flex-end;align-items:center;gap:14px;margin-top:28px;flex-wrap:wrap}
.btn{appearance:none;border:0;border-radius:999px;background:var(--brand);color:#fff;font:700 17px/1 var(--sans);letter-spacing:.06em;padding:15px 28px;min-height:50px;cursor:pointer;transition:background-color .15s,opacity .15s}
.btn:hover{background:#163C4A}
.btn:disabled{opacity:.4;cursor:not-allowed}
.btn:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
.hint{color:var(--muted);font-size:14px}
.err{color:var(--bad);font-weight:500;min-height:1.5em}
.pref{border-top:1px solid var(--line);padding-top:6px;margin-top:18px}
.pref .opts{display:grid;grid-template-columns:repeat(3,1fr);gap:6px}
.pref .opt span{justify-content:center;text-align:center}
.done-mark{width:64px;height:64px;border-radius:50%;background:var(--brand);display:grid;place-items:center;margin-bottom:16px;animation:pop .5s cubic-bezier(.2,1.4,.4,1)}
.done-mark svg{width:30px;height:30px;stroke:#fff;stroke-width:3;fill:none;stroke-dasharray:40;stroke-dashoffset:40;animation:draw .5s .25s forwards}
@keyframes pop{from{transform:scale(.4);opacity:0}}
@keyframes draw{to{stroke-dashoffset:0}}
.page-in{animation:pageIn .35s ease-out}
@keyframes pageIn{from{opacity:0;transform:translateX(18px)}}
.foot{margin-top:28px;padding-top:10px;border-top:1px solid var(--line);font-size:12.5px;color:var(--muted)}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}