:root { color-scheme:light dark; --paper:light-dark(#f7f6f0,#171f22); --surface:light-dark(#fff,#222d31); --ink:light-dark(#183b42,#e6f1f0); --muted:light-dark(#54696d,#b0c6c6); --line:light-dark(#d5e0dc,#42565b); --accent:light-dark(#185e54,#a1ddc8); --on-accent:light-dark(#fff,#10372e); --soft:light-dark(#e9f3ed,#293f38); --warm:light-dark(#faf0d3,#443b26); --warm-ink:light-dark(#71551a,#edd69d); --danger:light-dark(#a1322b,#ffb4a9); }
* { box-sizing:border-box; }
body { margin:0; background:var(--paper); color:var(--ink); font:400 1rem/1.7 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif; }
a { color:var(--accent); text-underline-offset:3px; }
button,input,select,textarea { font:inherit; }
input,select,textarea { min-width:0; max-width:100%; }
button,a,input,select,textarea { -webkit-tap-highlight-color:transparent; }
button,select,input:not([type=checkbox]):not([type=radio]),textarea { border:1px solid var(--line); color:var(--ink); background:var(--surface); border-radius:9px; }
button,select,input:not([type=checkbox]):not([type=radio]) { padding:9px 13px; min-height:44px; }
button { cursor:pointer; }
button:hover:not(:disabled) { border-color:var(--accent); }
button:disabled { opacity:.55; cursor:default; }
button.primary,.button.primary { background:var(--accent); color:var(--on-accent); border-color:var(--accent); }
button.danger { color:var(--danger); }
.button { display:inline-block; padding:9px 15px; min-height:44px; text-decoration:none; border:1px solid var(--line); border-radius:9px; background:var(--surface); color:var(--ink); text-align:center; }
:focus-visible { outline:3px solid var(--warm-ink); outline-offset:3px; }
[hidden] { display:none!important; }
.shell { max-width:1160px; margin:0 auto; padding:0 30px; }
.header { display:flex; align-items:center; justify-content:space-between; padding:26px 0 23px; gap:18px; }
.brand { color:var(--ink); display:flex; align-items:center; gap:12px; font-weight:650; font-size:1.4rem; line-height:1.4; text-decoration:none; }
.brand small { display:block; font-size:.8rem; color:var(--muted); font-weight:400; margin-top:3px; }
.brand-mark { display:grid; place-items:center; width:46px; height:46px; border-radius:14px; background:var(--accent); color:var(--on-accent); font-size:1.65rem; flex-shrink:0; }
.portal-link { font-size:.875rem; }
.nav { display:flex; gap:4px; flex-wrap:wrap; border-bottom:1px solid var(--line); padding-bottom:13px; }
.nav a { color:var(--muted); text-decoration:none; padding:8px 14px; border-radius:9px; font-size:.9375rem; }
.nav a[aria-current=page] { background:var(--accent); color:var(--on-accent); }
.notice { padding:11px 15px; border-radius:9px; background:var(--warm); color:var(--warm-ink); font-size:.8125rem; margin-top:16px; }
.alert,.message { padding:12px 16px; margin:16px 0; background:var(--warm); color:var(--warm-ink); border:1px solid var(--warm-ink); border-radius:10px; }
.alert a,.alert button { color:inherit; }
.message { background:var(--soft); color:var(--ink); border-color:var(--line); }
main { padding:27px 0 35px; min-height:50vh; overflow-wrap:anywhere; }
h1,h2,h3,p { margin-top:0; }
h1 { font-size:1.8rem; line-height:1.4; font-weight:650; margin-bottom:10px; }
h2 { font-size:1.3rem; line-height:1.5; font-weight:600; margin-bottom:10px; }
h3 { font-size:1.05rem; line-height:1.5; font-weight:600; margin-bottom:8px; }
p { margin-bottom:14px; }
.muted { color:var(--muted); }
.small { font-size:.8125rem; color:var(--muted); }
.eyebrow { color:var(--accent); font-size:.875rem; margin-bottom:7px; }
.heading-row { display:flex; align-items:center; justify-content:space-between; flex-wrap:wrap; gap:15px; margin-bottom:19px; }
.heading-row p { margin-bottom:0; }
.filters,.actions { display:flex; flex-wrap:wrap; gap:10px; align-items:center; }
.filters { margin:20px 0; }
.filters label { display:grid; gap:5px; font-size:.875rem; color:var(--muted); }
.filters input,.filters select { max-width:100%; min-width:0; }
.actions { margin-top:22px; }
.grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:17px; }
.unit-card,.panel { background:var(--surface); border:1px solid var(--line); border-radius:14px; padding:23px; min-width:0; }
.unit-card { display:flex; flex-direction:column; }
.unit-card p { color:var(--muted); margin:0 0 16px; }
.unit-card .actions { margin-top:auto; padding-top:10px; }
.unit-meta { display:flex; flex-wrap:wrap; gap:8px; align-items:center; margin-bottom:12px; font-size:.8125rem; color:var(--muted); }
.badge { display:inline-block; color:var(--accent); background:var(--soft); border-radius:6px; padding:3px 8px; font-size:.8125rem; }
.status { color:var(--muted); font-size:.875rem; }
.recommend { border-left:4px solid var(--accent); background:var(--soft); padding:17px 20px; border-radius:0 12px 12px 0; margin-bottom:22px; }
.recommend p:last-child { margin:0; }
.study-layout { display:grid; grid-template-columns:215px minmax(0,1fr); gap:25px; }
.study-aside { color:var(--muted); font-size:.875rem; }
.study-aside h2 { font-size:1rem; color:var(--ink); }
.study-aside ul { padding-left:20px; }
.study-aside .boundary { padding-top:15px; border-top:1px solid var(--line); }
.step-list { display:flex; flex-wrap:wrap; padding:0; margin:22px 0; list-style:none; gap:8px 18px; color:var(--muted); font-size:.875rem; }
.step-list li[aria-current=step] { color:var(--accent); font-weight:600; }
.prompt { font-size:1.125rem; line-height:1.75; margin-bottom:18px; }
.field { display:grid; gap:7px; margin:17px 0; }
.field label { font-size:.9375rem; }
textarea { width:100%; min-height:170px; padding:14px; resize:vertical; line-height:1.7; }
.symbol-bar { display:flex; flex-wrap:wrap; gap:5px; margin-top:6px; }
.symbol-bar button { font-size:.9375rem; padding:4px 12px; min-width:42px; }
.char-count { font-size:.8125rem; color:var(--muted); text-align:right; margin:3px 0 0; }
.quote { padding:15px 17px; margin:17px 0; background:var(--paper); border-left:3px solid var(--line); border-radius:0 8px 8px 0; white-space:pre-wrap; overflow-wrap:anywhere; }
.help { padding:16px 18px; border-radius:10px; background:var(--soft); margin:17px 0; }
.help p:last-child { margin-bottom:0; }
.choices { display:grid; gap:9px; border:0; padding:0; margin:18px 0; min-width:0; }
.choices legend { padding:0; margin-bottom:9px; font-weight:600; }
.choice { display:flex; align-items:flex-start; gap:10px; padding:12px 14px; border:1px solid var(--line); border-radius:9px; cursor:pointer; background:var(--surface); }
.choice:has(input:checked) { background:var(--soft); border-color:var(--accent); }
.choice input { flex-shrink:0; margin-top:7px; accent-color:var(--accent); width:17px; height:17px; }
.choice span { min-width:0; }
.error { color:var(--danger); margin:12px 0; }
.evidence { border-top:1px solid var(--line); padding-top:15px; margin-top:23px; display:grid; grid-template-columns:repeat(3,minmax(0,1fr)); gap:15px; }
.evidence dt { font-size:.8125rem; color:var(--muted); }
.evidence dd { margin:5px 0 0; font-size:.9375rem; }
.empty { border:1px dashed var(--line); border-radius:12px; padding:25px; }
.stack { display:grid; gap:18px; }
.report-row { display:grid; grid-template-columns:105px minmax(0,1fr); gap:20px; padding:15px 0; border-bottom:1px solid var(--line); }
.report-row dt { color:var(--muted); font-size:.875rem; }
.report-row dd { margin:0; }
.report-row:last-child { border-bottom:0; }
.settings-grid { display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:20px; }
details { margin:15px 0; }
summary { cursor:pointer; padding:7px 0; color:var(--accent); }
.footer { border-top:1px solid var(--line); padding:20px 0 30px; display:flex; flex-wrap:wrap; justify-content:space-between; gap:10px; font-size:.8125rem; color:var(--muted); }
.skip-link { position:absolute; left:12px; top:-100px; background:var(--surface); padding:10px; z-index:10; }
.skip-link:focus { top:10px; }
@media(max-width:800px) { .study-layout { grid-template-columns:1fr; } .study-aside { display:none; } .settings-grid { grid-template-columns:1fr; } }
@media(max-width:600px) { .shell { padding:0 16px; } .header { align-items:flex-start; } .brand { font-size:1.15rem; } .brand-mark { width:40px; height:40px; } .portal-link { max-width:80px; } .nav { gap:3px; } .nav a { padding:7px 10px; font-size:.875rem; } h1 { font-size:1.5rem; } .grid { grid-template-columns:1fr; } .panel,.unit-card { padding:18px; } .evidence { grid-template-columns:1fr; gap:9px; } .evidence div { display:flex; justify-content:space-between; gap:13px; } .evidence dd { margin:0; } .report-row { grid-template-columns:1fr; gap:5px; } .filters label { flex:1; min-width:110px; } .filters select { width:100%; } }
@media(prefers-reduced-motion:reduce) { *,*::before,*::after { scroll-behavior:auto!important; } }