/* 字体：Inter（数字、英文）+ 思源黑体繁体（题目、考试界面）+ 思源黑体简体（解析、说明），均为 OFL，已子集化 */
@font-face{font-family:"InterSub";src:url(../fonts/inter-sub.woff2) format("woff2");font-weight:400 800;font-display:swap}
@font-face{font-family:"NotoTC";src:url(../fonts/noto-tc.woff2) format("woff2");font-weight:400 700;font-display:swap}
@font-face{font-family:"NotoSC";src:url(../fonts/noto-sc.woff2) format("woff2");font-weight:400 700;font-display:swap}
:root{
  --bg:#F6F7F9;--surface:#FFFFFF;--ink:#14202E;--sub:#5B6776;--faint:#8A95A3;--line:#E4E8ED;--soft:#EEF1F5;
  --pri:#1D3F6E;--pri-ink:#FFFFFF;--pri-soft:#E8EEF7;
  --ok:#2E7D57;--ok-soft:#E7F3EC;--bad:#B4443A;--bad-soft:#F8EAE8;--hl:#FFF3C4;
  --shadow:0 1px 2px rgba(20,32,46,.05),0 6px 20px rgba(20,32,46,.06);
  --r:16px;--r-sm:12px;
  --safe-t:env(safe-area-inset-top,0px);--safe-b:env(safe-area-inset-bottom,0px);
  --tc:"InterSub","NotoTC","PingFang TC","Noto Sans TC",sans-serif;
  --sc:"InterSub","NotoSC","PingFang SC","Noto Sans SC","Microsoft YaHei",sans-serif;
  --ease:cubic-bezier(.2,.7,.2,1);
  color-scheme:light dark;
}
@media (prefers-color-scheme:dark){:root{
  --bg:#0E1217;--surface:#161C24;--ink:#E7ECF2;--sub:#A3AEBB;--faint:#7D8897;--line:#27303B;--soft:#1E2630;
  --pri:#8FB3E8;--pri-ink:#0E1217;--pri-soft:#1D2A3D;
  --ok:#5DBB8A;--ok-soft:#173026;--bad:#E07A70;--bad-soft:#3A1F1C;--hl:#4A4220;
  --shadow:0 1px 2px rgba(0,0,0,.4),0 6px 20px rgba(0,0,0,.35)}}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sc);font-size:16px;line-height:1.5;-webkit-text-size-adjust:100%}
body{overflow-x:hidden}
body.has-tab #app{padding-bottom:calc(var(--safe-b) + 88px)}
#app{max-width:520px;margin:0 auto;min-height:100vh;padding:calc(var(--safe-t) + 8px) 16px calc(var(--safe-b) + 24px)}
#app.enter{animation:enter .2s var(--ease)}
@keyframes enter{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}
.tc{font-family:var(--tc)}
.tnum{font-family:"InterSub",var(--sc);font-variant-numeric:tabular-nums}
.h1{font-size:28px;line-height:1.25;font-weight:700;margin:16px 0 8px;letter-spacing:-.01em}
.h1-sub{display:block;font-size:20px;font-weight:500;color:var(--sub);margin-top:4px}
.h2{font-size:17px;font-weight:700;margin:24px 0 8px}
.m0{margin:0}
.muted{color:var(--sub)}.small{font-size:13px}.block{display:block}
.center{text-align:center}.mt{margin-top:16px}.mt8{margin-top:8px}
.row{display:flex;gap:8px;align-items:center}.between{justify-content:space-between}.grow{flex:1;min-width:0}.center-row{justify-content:center;gap:16px}
.ic{flex:none;vertical-align:middle}
.eyebrow{font-size:13px;color:var(--sub);letter-spacing:.02em}
p{margin:4px 0}
a{color:var(--pri)}
/* 按钮 */
.btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;min-height:52px;padding:12px 20px;border-radius:14px;border:1px solid var(--pri);background:var(--pri);color:var(--pri-ink);font:inherit;font-weight:600;font-size:17px;cursor:pointer;text-decoration:none;transition:transform .12s var(--ease),opacity .12s}
.btn:active{transform:scale(.98);opacity:.92}
.btn[disabled]{opacity:.45;pointer-events:none}
.btn.ghost{background:var(--surface);color:var(--ink);border-color:var(--line)}
.btn.small{min-height:44px;font-size:15px;width:auto;padding:8px 14px;border-radius:12px}
.btn.w-auto{width:auto;flex:none;padding:12px 18px}
.btn.inv{background:#fff;color:#14202E;border-color:#fff}
.btn.ghost-inv{background:transparent;color:#fff;border-color:rgba(255,255,255,.4)}
.btn.danger{color:var(--bad)}
.textbtn{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:0 4px;background:none;border:0;color:var(--pri);font:inherit;font-size:15px;cursor:pointer}
.textbtn[disabled]{color:var(--faint)}
.textbtn:active,.iconbtn:active,.lrow:active,.entry:active,.chip:active,.opt:active,.kopt:active{opacity:.7}
.iconbtn{min-width:44px;min-height:44px;display:inline-flex;align-items:center;justify-content:center;border:0;background:none;color:var(--ink);cursor:pointer;border-radius:12px}
.iconbtn.sm{color:var(--faint)}
.stack8{display:grid;gap:8px}
/* 卡片和列表 */
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);padding:16px;margin:12px 0}
.card.list{padding:0;overflow:hidden}
.lrow{display:flex;align-items:center;gap:12px;width:100%;min-height:56px;padding:12px 16px;background:none;border:0;border-bottom:1px solid var(--line);text-align:left;font:inherit;color:var(--ink);cursor:pointer;text-decoration:none}
.lrow:last-child{border-bottom:0}.lrow.static{cursor:default}
.lrow .ic:last-child{color:var(--faint)}
.cell-ic{width:36px;height:36px;border-radius:10px;background:var(--pri-soft);color:var(--pri);display:flex;align-items:center;justify-content:center;flex:none}
.bar{height:6px;background:var(--soft);border-radius:99px;overflow:hidden;margin:8px 0 2px}.bar>i{display:block;height:100%;background:var(--pri);border-radius:99px}.bar.ok>i{background:var(--ok)}
.prog{height:6px;background:rgba(255,255,255,.25);border-radius:99px;overflow:hidden;flex:1}.prog>i{display:block;height:100%;background:#fff;border-radius:99px;transition:width .25s var(--ease)}
.prog.thin{height:4px;background:var(--soft)}.prog.thin>i{background:var(--pri)}
/* 首页 */
.home-top{display:flex;align-items:center;justify-content:space-between;margin-top:8px}
.streak{display:inline-flex;align-items:center;gap:4px;min-height:40px;padding:0 12px;border-radius:99px;background:var(--surface);border:1px solid var(--line);color:var(--faint);font:inherit;font-weight:700;cursor:pointer}
.streak.on{color:#C8641E}
.task{background:var(--pri);color:#fff;border-radius:20px;padding:20px;margin:8px 0 16px;box-shadow:var(--shadow)}
@media (prefers-color-scheme:dark){.task{background:#1D3F6E}}
.task-t{font-size:20px;font-weight:700}.task-s{font-size:14px;opacity:.82;margin:4px 0 16px}
.task-p{display:flex;align-items:center;gap:12px;margin-bottom:16px;font-weight:600}
.entries{display:grid;gap:8px}
.entry{display:flex;align-items:center;gap:16px;min-height:76px;padding:16px;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);text-align:left;font:inherit;color:var(--ink);cursor:pointer}
.entry-ic{width:44px;height:44px;border-radius:12px;background:var(--pri-soft);color:var(--pri);display:flex;align-items:center;justify-content:center;flex:none}
.entry-t{display:block;font-size:17px;font-weight:700}.entry-s{display:block;font-size:13px;color:var(--sub)}
.resume{display:flex;align-items:center;gap:8px;width:100%;min-height:48px;margin-top:12px;padding:8px 16px;border-radius:12px;border:1px dashed var(--line);background:none;color:var(--sub);font:inherit;cursor:pointer}
/* 底部导航 */
#tabbar{position:fixed;left:0;right:0;bottom:0;z-index:20;display:flex;justify-content:center;background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:saturate(1.6) blur(16px);-webkit-backdrop-filter:saturate(1.6) blur(16px);border-top:1px solid var(--line);padding:0 8px var(--safe-b)}
#tabbar[hidden]{display:none}
.tab{flex:1;max-width:130px;display:flex;flex-direction:column;align-items:center;gap:2px;min-height:56px;padding:6px 0;background:none;border:0;color:var(--faint);font:inherit;font-size:11px;cursor:pointer;position:relative}
.tab.on{color:var(--pri);font-weight:700}
.tab .dot{position:absolute;top:6px;margin-left:16px;width:7px;height:7px;border-radius:50%;background:var(--bad)}
/* 页头 */
.page-head{margin:8px 0}
.nav{position:sticky;top:0;z-index:10;display:flex;align-items:center;min-height:52px;margin:0 -16px;padding:var(--safe-t) 4px 0;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px)}
.nav-t{flex:1;text-align:center;font-weight:700;font-size:17px}.nav-r{min-width:44px;text-align:right;padding-right:12px}
/* 一屏一题 */
.qscreen{min-height:calc(100vh - var(--safe-t) - 32px);display:flex;flex-direction:column}
.qbar{display:flex;align-items:center;gap:8px;min-height:52px;margin:0 -8px}
.qbar-p{flex:1}.qbar-n{font-size:14px;color:var(--sub);min-width:44px;text-align:right;padding-right:8px}.qbar-t{flex:1;text-align:center;font-weight:700}
.qwrap{flex:1;display:flex;flex-direction:column;justify-content:center;padding:8px 0 16px}
.sign{width:128px;height:128px;margin:0 auto 16px}
.qtext{font-size:22px;line-height:1.45;font-weight:600;margin:0 0 24px;letter-spacing:.01em}
.qtext.small-q{font-size:17px;margin:8px 0 16px;color:var(--sub);font-weight:500}
.opts{display:grid;gap:12px}
.opt{display:flex;gap:12px;align-items:center;width:100%;min-height:64px;padding:14px 16px;text-align:left;background:var(--surface);border:1.5px solid var(--line);border-radius:var(--r);box-shadow:var(--shadow);font-size:18px;line-height:1.4;color:var(--ink);cursor:pointer;transition:transform .12s var(--ease),border-color .15s,background .15s}
.opt:active{transform:scale(.985)}
.opt .k{flex:none;width:30px;height:30px;border-radius:50%;border:1.5px solid var(--line);display:flex;align-items:center;justify-content:center;font-family:"InterSub",sans-serif;font-weight:600;font-size:14px;color:var(--sub)}
.opt.ok{border-color:var(--ok);background:var(--ok-soft);animation:pop .22s var(--ease)}.opt.ok .k{background:var(--ok);border-color:var(--ok);color:#fff}
.opt.bad{border-color:var(--bad);background:var(--bad-soft);animation:shake .24s var(--ease)}.opt.bad .k{background:var(--bad);border-color:var(--bad);color:#fff}
.opt.dim{opacity:.55}.opt[disabled]{cursor:default}
@keyframes pop{50%{transform:scale(1.015)}}
@keyframes shake{25%{transform:translateX(-4px)}75%{transform:translateX(4px)}}
.qfoot{position:sticky;bottom:0;padding:12px 0 calc(var(--safe-b) + 12px);background:linear-gradient(transparent,var(--bg) 24%);display:grid;gap:8px;animation:enter .2s var(--ease)}
.qfb{display:flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:17px}.qfb.ok{color:var(--ok)}.qfb.bad{color:var(--bad)}
.xscreen{padding-bottom:96px}
.sticky-cta{position:fixed;left:0;right:0;bottom:0;padding:12px 16px calc(var(--safe-b) + 12px);background:linear-gradient(transparent,var(--bg) 30%);z-index:5}
.sticky-cta .btn{max-width:488px;margin:0 auto}
/* 解析 */
.fb{display:flex;gap:12px;align-items:flex-start;border-radius:var(--r-sm);padding:12px 16px;margin:12px 0;font-size:16px}
.fb.ok{background:var(--ok-soft);color:var(--ok)}.fb.bad{background:var(--bad-soft);color:var(--bad)}
.expl{margin:16px 0}.sec-t{font-size:13px;font-weight:700;color:var(--sub);letter-spacing:.04em;margin-bottom:8px}
.expl p{font-size:16px;line-height:1.65}
.loc{display:flex;align-items:center;gap:6px;font-size:14px;color:var(--ink);background:var(--soft);border-radius:10px;padding:8px 12px;margin-bottom:8px}
.shot-wrap{position:relative;display:block;width:100%;padding:0;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;cursor:zoom-in}
.shot{display:block;width:100%;height:auto}
.zoom-badge{position:absolute;right:8px;bottom:8px;display:inline-flex;align-items:center;gap:4px;padding:4px 10px;border-radius:99px;background:rgba(20,32,46,.72);color:#fff;font-size:12px}
.speech{display:flex;align-items:center;gap:12px;margin-top:12px}.speech input[type=range]{flex:1;accent-color:var(--pri)}
.note{display:flex;gap:6px;align-items:center;color:var(--sub);font-size:14px}
/* 数字卡、要点 */
.nums{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin:16px 0}
.num{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-sm);padding:16px 8px;text-align:center;box-shadow:var(--shadow)}
.num-v{font-family:"InterSub",sans-serif;font-variant-numeric:tabular-nums;font-size:30px;font-weight:700;line-height:1.1}
.num-l{font-size:12px;color:var(--sub);margin-top:4px}
.num.ok .num-v{color:var(--ok)}.num.bad .num-v{color:var(--bad)}
.pts{display:grid;gap:16px;margin:16px 0}
.pt{display:flex;gap:12px;align-items:flex-start}
.pt-ic{width:36px;height:36px;border-radius:10px;background:var(--pri-soft);color:var(--pri);display:flex;align-items:center;justify-content:center;flex:none}
.pt-t{font-weight:600}.pt-s{font-size:14px;color:var(--sub)}
.callout{display:flex;gap:12px;background:var(--pri-soft);border-radius:var(--r);padding:16px;margin:12px 0;color:var(--ink)}
details.src{margin:8px 0}details.src summary{display:inline-flex;align-items:center;gap:6px;min-height:44px;color:var(--pri);cursor:pointer;list-style:none}
details.src ul{margin:0;padding-left:20px;font-size:14px}details.src li{margin:6px 0}
details.fold summary{cursor:pointer;font-weight:700;min-height:28px;list-style:none;display:flex;justify-content:space-between}
details.fold summary::after{content:"＋";color:var(--faint)}details.fold[open] summary::after{content:"－"}
summary::-webkit-details-marker{display:none}
.mrow{margin:12px 0}
.heat{display:grid;grid-template-rows:repeat(7,11px);grid-auto-flow:column;grid-auto-columns:11px;gap:3px;overflow:hidden;margin-bottom:8px}
.heat i,.legend i{width:11px;height:11px;border-radius:3px;background:var(--soft);display:inline-block}
.heat i.l1,.legend i.l1{background:#C9D6E8}.heat i.l2,.legend i.l2{background:#8DA6C9}.heat i.l3,.legend i.l3{background:#4E6F9C}.heat i.l4,.legend i.l4{background:var(--pri)}
.legend{display:inline-flex;align-items:center;gap:3px}
.badges{display:grid;grid-template-columns:repeat(2,1fr);gap:8px;margin-top:12px}
.badge{display:flex;align-items:center;gap:8px;padding:12px;border:1px solid var(--line);border-radius:12px;color:var(--faint);font-size:14px}
.badge.on{color:var(--ink);border-color:var(--pri)}.badge.on .badge-ic{color:var(--pri)}
.pill{font-size:13px;font-weight:600;padding:4px 10px;border-radius:99px}.pill.ok{background:var(--ok-soft);color:var(--ok)}.pill.bad{background:var(--bad-soft);color:var(--bad)}
.ready{display:flex;gap:12px;border-color:var(--ok)}
.me-head{display:flex;align-items:center;gap:16px;margin:16px 0}
.avatar{width:40px;height:40px;border-radius:50%;background:var(--pri-soft);color:var(--pri);display:flex;align-items:center;justify-content:center;font-weight:700;overflow:hidden;flex:none}
.avatar.lg{width:56px;height:56px;font-size:22px}.avatar img{width:100%;height:100%;object-fit:cover}
.chips{display:flex;gap:8px;overflow-x:auto;padding:12px 0 4px;scrollbar-width:none}
.chip{flex:none;min-height:36px;padding:6px 14px;border-radius:99px;border:1px solid var(--line);background:var(--surface);font:inherit;font-size:14px;color:var(--ink);cursor:pointer}
.chip.on{background:var(--pri);color:var(--pri-ink);border-color:var(--pri)}
.wrow{border-bottom:1px solid var(--line)}.wrow:last-child{border-bottom:0}
.wrow summary{display:flex;align-items:center;gap:12px;min-height:56px;padding:12px 16px;cursor:pointer;list-style:none}
.wrow .chev{color:var(--faint);transition:transform .15s}.wrow[open] .chev{transform:rotate(90deg)}
.wbody{padding:0 16px 16px}
/* 空状态 / 骨架 */
.empty{text-align:center;padding:40px 16px}.empty .btn{max-width:240px;margin:16px auto 0}
.empty-t{font-weight:700;font-size:17px;margin-top:8px}
.art{width:120px;height:96px}.a-fill{fill:var(--soft)}.a-fill2{fill:var(--pri-soft)}.a-line{fill:none;stroke:var(--faint);stroke-width:2;stroke-linecap:round}.a-ok{fill:var(--ok)}.a-okline{fill:none;stroke:#fff;stroke-width:3;stroke-linecap:round;stroke-linejoin:round}
.sk .sk-l,.sk .sk-img,.sk-b{background:linear-gradient(90deg,var(--soft),var(--line),var(--soft));background-size:200% 100%;animation:sk 1.2s infinite;border-radius:8px}
.sk-l{height:12px;margin:8px 0}.w20{width:20%}.w40{width:40%}.w90{width:90%}.sk-img{height:160px;margin-top:12px}
@keyframes sk{to{background-position:-200% 0}}
/* 考友圈 */
.post{padding:16px 0;border-bottom:1px solid var(--line)}
.post-t{white-space:pre-wrap;margin:8px 0}
.post img.media{width:100%;border-radius:12px;border:1px solid var(--line);margin-top:8px}
.acts{display:flex;gap:16px;margin-top:8px}
.act{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:0 8px;background:none;border:0;color:var(--sub);font:inherit;cursor:pointer}
.act.on{color:var(--bad);font-weight:700}
.composer{display:flex;gap:8px;align-items:flex-end;margin-top:16px}
.pad{padding:0 4px}
/* 表单 */
.lbl{display:block;font-weight:600;margin-bottom:8px}
.field{display:flex;align-items:center;gap:8px;padding:0 12px;border:1.5px solid var(--line);border-radius:14px;background:var(--surface);color:var(--faint)}
.field:focus-within{border-color:var(--pri)}
.field input{flex:1;min-height:52px;border:0;outline:0;background:none;font:inherit;font-size:17px;color:var(--ink)}
input[type=email],input[type=text],textarea,select{font:inherit;font-size:16px;color:var(--ink)}
textarea{width:100%;min-height:96px;border:1.5px solid var(--line);border-radius:14px;padding:12px;background:var(--surface)}
.composer textarea{min-height:48px}
.hint{font-size:13px;color:var(--sub);margin:8px 0 16px}.hint.warn{color:var(--bad)}
.err{min-height:20px;font-size:14px;color:var(--bad);margin:8px 0}
.otp{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;margin:8px 0}
.otp-i{width:100%;height:56px;text-align:center;font-family:"InterSub",sans-serif;font-size:24px;font-weight:600;border:1.5px solid var(--line);border-radius:12px;background:var(--surface);color:var(--ink);outline:0}
.otp-i:focus{border-color:var(--pri);box-shadow:0 0 0 3px var(--pri-soft)}.otp-i.filled{border-color:var(--pri)}
.otp.busy{opacity:.5}.otp.shake{animation:shake .3s}
.seg{display:inline-flex;background:var(--soft);border-radius:10px;padding:3px}.seg.wide{display:flex}
.seg-b{flex:1;min-height:38px;padding:0 12px;border:0;border-radius:8px;background:none;font:inherit;font-size:15px;color:var(--sub);cursor:pointer}
.seg-b.on{background:var(--surface);color:var(--ink);font-weight:600;box-shadow:0 1px 3px rgba(0,0,0,.08)}
.switch{appearance:none;-webkit-appearance:none;width:51px;height:31px;border-radius:99px;background:var(--line);position:relative;cursor:pointer;transition:background .2s;flex:none}
.switch::after{content:"";position:absolute;top:2px;left:2px;width:27px;height:27px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.2);transition:transform .2s var(--ease)}
.switch:checked{background:var(--ok)}.switch:checked::after{transform:translateX(20px)}
.time{min-height:40px;border:1px solid var(--line);border-radius:10px;padding:0 8px;background:var(--surface);color:var(--ink);font:inherit}
/* 登录 */
.login{margin:0 -16px}
.hero{height:240px;overflow:hidden;background:#EEF2F4}.hero img,.hero-svg{width:100%;height:100%;object-fit:cover;display:block}
.h-sky1{stop-color:#F7F4EE}.h-sky2{stop-color:#EAF0F5}.h-hill1{fill:#DCE3E8}.h-hill2{fill:#C9D3DA}.h-ground{fill:#E8E3D7}
@media (prefers-color-scheme:dark){.hero{background:#1A2230}.h-sky1{stop-color:#1B2433}.h-sky2{stop-color:#222D3D}.h-hill1{fill:#2A3545}.h-hill2{fill:#323E50}.h-ground{fill:#2B2E30}}
.login-body{padding:0 16px calc(var(--safe-b) + 24px);margin-top:-24px;position:relative}
.login-body .h1{background:var(--bg);display:inline-block;padding:8px 12px 0 0;border-radius:0 12px 0 0}
.login-card{margin-top:16px}
.login-foot{text-align:center;font-size:12px;color:var(--faint);margin-top:24px;line-height:2}.login-foot a{color:var(--faint);text-decoration:none}.login-foot span{margin:0 6px}
.welcome{min-height:80vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;animation:enter .25s var(--ease)}
.welcome-ic{width:80px;height:80px;border-radius:50%;background:var(--ok);color:#fff;display:flex;align-items:center;justify-content:center;margin-bottom:8px}
/* 新手引导 */
.onb{min-height:calc(100vh - 40px);display:flex;flex-direction:column}
.onb-top{display:flex;justify-content:space-between;align-items:center;min-height:44px}
.onb-body{flex:1}
.onb-foot{display:grid;gap:16px;padding-bottom:var(--safe-b)}
.dots{display:flex;gap:6px;justify-content:center}.dots i{width:6px;height:6px;border-radius:99px;background:var(--line);transition:width .2s}.dots i.on{width:18px;background:var(--pri)}
/* 弹层 */
.modal{position:fixed;inset:0;background:rgba(10,16,24,.45);z-index:50;display:flex;align-items:flex-end;justify-content:center;animation:fade .18s}
.modal[hidden]{display:none}
@keyframes fade{from{opacity:0}}
.sheet{background:var(--surface);border-radius:22px 22px 0 0;width:100%;max-width:520px;max-height:92vh;overflow:auto;padding:8px 20px calc(var(--safe-b) + 20px);animation:up .22s var(--ease)}
@keyframes up{from{transform:translateY(24px);opacity:.6}}
.grab{width:36px;height:5px;border-radius:99px;background:var(--line);margin:4px auto 12px}
.sheet .btn+.btn{margin-top:8px}
.sheet-ic{width:56px;height:56px;border-radius:50%;background:var(--pri-soft);color:var(--pri);display:flex;align-items:center;justify-content:center;margin:12px auto 4px}.sheet-ic.ok{background:var(--ok-soft);color:var(--ok)}
.sheet.full{border-radius:0;height:100%;max-height:none;padding:0}
.sheet.viewer{background:#000;position:relative}
.viewer-in{width:100%;height:100%;overflow:auto;display:flex;align-items:center;-webkit-overflow-scrolling:touch}
.viewer-in img{width:100%;height:auto;margin:auto;touch-action:pan-x pan-y pinch-zoom;background:#fff}.viewer-in img.x2{width:200%;max-width:none}
.viewer-close{position:fixed;top:calc(var(--safe-t) + 12px);right:12px;width:44px;height:44px;border-radius:50%;border:0;background:rgba(255,255,255,.92);color:#14202E;display:flex;align-items:center;justify-content:center;cursor:pointer}
.viewer-tip{position:fixed;left:0;right:0;bottom:calc(var(--safe-b) + 12px);text-align:center;color:#C9D1D9;font-size:12px}
.sc-img{width:100%;border:1px solid var(--line);border-radius:12px}
.ios-guide{max-width:320px;display:block;margin:8px auto}.g-bg{fill:var(--soft)}.g-bar{fill:var(--surface)}.g-ink{stroke:var(--ink)}.g-icon{fill:var(--surface);stroke:var(--ink);stroke-width:2}.g-text{fill:var(--ink)}
.toast{position:fixed;left:50%;transform:translateX(-50%);bottom:calc(var(--safe-b) + 96px);background:#14202E;color:#fff;padding:12px 18px;border-radius:14px;z-index:60;font-size:15px;max-width:90vw;text-align:center;box-shadow:var(--shadow)}
.toast.show{animation:fade .18s}.toast[hidden]{display:none}
.toast-btn{background:none;border:0;color:#9DC1FF;font:inherit;font-weight:700;min-height:32px;cursor:pointer}
.disclaim{color:var(--faint);font-size:12px;text-align:center;margin:24px 0 8px}
.hidden{display:none!important}
/* 模拟考试：仿现场触屏机——白底、深色标题栏、大字、按钮在底部 */
.kiosk{margin:calc(-8px - var(--safe-t)) -16px calc(-24px - var(--safe-b));min-height:100vh;display:flex;flex-direction:column;background:var(--surface)}
.kbar{background:#1F2A37;color:#fff;padding:calc(var(--safe-t) + 12px) 16px 12px;display:flex;align-items:center;gap:8px;min-height:56px}
.kbar-t{flex:1;font-weight:700;font-size:16px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.kbar-n{font-size:13px;opacity:.9}
.kbtn{min-width:44px;min-height:44px;border:0;background:none;color:#fff;display:flex;align-items:center;justify-content:center;cursor:pointer}
.kbody{flex:1;padding:16px;display:flex;flex-direction:column}
.kh{font-size:26px;font-weight:700;margin:8px 0}
.kmuted{color:var(--sub)}
.klist{display:grid;gap:8px;margin:16px 0}
.kopt{display:flex;align-items:center;gap:12px;min-height:56px;padding:12px 16px;background:var(--bg);border:1.5px solid var(--line);border-radius:12px;font:inherit;font-size:17px;color:var(--ink);text-align:left;cursor:pointer}
.klbl{display:block;font-size:14px;color:var(--sub);margin:16px 0 8px}
.kinput{width:100%;min-height:56px;border:1.5px solid var(--line);border-radius:12px;padding:0 16px;font-size:22px;letter-spacing:.08em;background:var(--bg);color:var(--ink);outline:0}
.kinput:focus{border-color:var(--pri)}
.khint{font-size:14px;color:var(--sub);margin:8px 0}.khint.warn{color:var(--bad)}
.kvalue{min-height:52px;display:flex;align-items:center;padding:0 16px;border-radius:12px;background:var(--bg);font-size:18px}
.kprivacy{display:flex;align-items:center;gap:6px;margin-top:24px;color:var(--sub);font-size:14px}
.krules{padding-left:20px;margin:8px 0;font-size:16px;line-height:1.6}.krules li{margin:8px 0}
.kstat{display:flex;gap:16px;align-items:center;font-size:14px;color:var(--sub);padding-bottom:8px;border-bottom:1px solid var(--line)}
.kstat>span:first-child{flex:1;color:var(--ink);font-size:15px}
.ks.ok b{color:var(--ok)}.ks.bad b{color:var(--bad)}
.kfoot{position:sticky;bottom:0;padding:12px 16px calc(var(--safe-b) + 12px);border-top:1px solid var(--line);background:var(--surface);display:flex;flex-wrap:wrap;gap:8px}
.kfoot .btn{flex:1}
.kfb{width:100%;display:flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:18px;padding:4px 0;animation:enter .18s}.kfb.ok{color:var(--ok)}.kfb.bad{color:var(--bad)}
.kdis{text-align:center;color:var(--faint);font-size:12px;padding:8px 0 calc(var(--safe-b) + 8px);background:var(--surface)}
.kiosk .qwrap{padding-top:16px}
.transcript{border:1px solid var(--line);border-radius:var(--r);padding:16px;background:var(--bg)}
.tr-h{font-weight:700;font-size:18px;margin-bottom:8px}
.tr-row{display:flex;justify-content:space-between;align-items:center;min-height:40px;border-bottom:1px solid var(--line);font-size:16px}.tr-row span{color:var(--sub)}
.tr-res{display:flex;align-items:center;gap:12px;justify-content:center;padding:20px 0;font-size:28px;font-weight:800}
.tr-res>div{display:flex;align-items:center;gap:8px}.tr-res.ok{color:var(--ok)}.tr-res.bad{color:var(--bad)}
.res-anim{width:88px;border-radius:12px;overflow:hidden}.res-anim video{width:100%;display:block}