:root{--navy:#123a78;--blue:#2563eb;--green:#16a34a;--amber:#d97706;--red:#dc2626;
--ink:#132238;--muted:#64748b;--line:#dbe4f0;--bg:#eef3f9;--card:#fff;--shadow:0 8px 24px rgba(24,55,92,.08);
--stem:20px;--opt:18px;--body:15px}
body.f-large{--stem:23px;--opt:20px;--body:17px}
body.f-xl{--stem:26px;--opt:22px;--body:18px}
body.dark{--ink:#e6edf6;--muted:#94a3b8;--line:#25344a;--bg:#0e1726;--card:#16223a;--shadow:0 8px 24px rgba(0,0,0,.35)}
*{box-sizing:border-box;margin:0;padding:0;-webkit-tap-highlight-color:transparent}
html{background:var(--bg)}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft Yahei",sans-serif;background:var(--bg);color:var(--ink);font-size:var(--body);padding-bottom:calc(30px + env(safe-area-inset-bottom))}
button{font:inherit;color:inherit;border:0;background:none}
input,textarea{font:inherit;color:var(--ink)}
.hide{display:none!important}
.page{padding:14px;max-width:680px;margin:0 auto}
.c-red{color:var(--red)}.c-green{color:var(--green)}.c-amber{color:#b45309}
mark{background:#fde68a;color:#78350f;border-radius:3px;padding:0 2px}

.app-header{min-height:calc(86px + env(safe-area-inset-top));padding:12px 14px 13px;padding-top:calc(12px + env(safe-area-inset-top));background:linear-gradient(120deg,#102f67,#1f5fb9);color:#fff;display:flex;align-items:center;justify-content:space-between;gap:10px;position:sticky;top:0;z-index:20;box-shadow:0 2px 14px rgba(12,42,86,.18)}
.brand{display:flex;gap:10px;align-items:center;min-width:0}
.mark{width:40px;height:40px;flex:0 0 40px;background:#fff;color:var(--navy);border-radius:12px;display:grid;place-items:center;font-weight:800;font-size:21px}
.brand b{display:block;font-size:18px;line-height:1.25;white-space:nowrap}
.brand small{display:block;color:#fff;margin-top:5px;font-size:13px;line-height:1.3;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:46vw}
.hd-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.icon-btn{width:38px;height:38px;border-radius:12px;background:rgba(255,255,255,.14);color:#fff;font-size:18px}
.learner-chip{border:1px solid rgba(255,255,255,.4);background:rgba(255,255,255,.13);color:#fff;border-radius:18px;padding:8px 12px;font-size:14px;font-weight:650;max-width:32vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

.card{background:var(--card);border-radius:18px;padding:16px;box-shadow:var(--shadow)}
.intro-badge{display:inline-block;background:#e8f0fe;color:#2458a6;border-radius:12px;padding:5px 10px;font-size:12px;font-weight:700;margin-bottom:10px}
.intro h1{font-size:22px;margin-bottom:12px}
.steps{list-style:none;counter-reset:s;margin-bottom:16px}
.steps li{counter-increment:s;position:relative;padding-left:38px;margin-bottom:13px}
.steps li::before{content:counter(s);position:absolute;left:0;top:0;width:26px;height:26px;border-radius:50%;background:var(--blue);color:#fff;display:grid;place-items:center;font-size:14px;font-weight:700}
.steps b{display:block;font-size:16px}
.steps span{display:block;color:var(--muted);font-size:13px;margin-top:3px;line-height:1.5}
.intro label{display:block;font-size:14px;color:var(--muted);margin:10px 0 6px}
input[type=text],input:not([type]),#setupName,#newName,#searchInput,input[type=date],textarea{width:100%;border:2px solid var(--line);border-radius:12px;padding:13px;font-size:16px;background:var(--card)}
textarea{line-height:1.6;resize:vertical}
.check{display:flex;align-items:flex-start;gap:9px;margin:12px 0;font-size:14px;color:var(--muted);line-height:1.5}
.check input{width:20px;height:20px;flex:0 0 20px;margin-top:1px}

.hero{background:var(--card);border-radius:22px;padding:17px;box-shadow:var(--shadow)}
.hero-top{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--muted);gap:8px}
.pill{background:#e8f0fe;color:#2458a6;border-radius:16px;padding:6px 11px;font-weight:650;font-size:13px;max-width:60%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
body.dark .pill{background:#1e3358;color:#93c5fd}
.hero-main{display:flex;gap:18px;align-items:center;padding:16px 0}
.ring{--p:0deg;width:112px;height:112px;flex:0 0 112px;border-radius:50%;background:conic-gradient(var(--blue) var(--p),#e5edf7 0);padding:9px}
body.dark .ring{background:conic-gradient(var(--blue) var(--p),#25344a 0)}
.ring>div{width:100%;height:100%;background:var(--card);border-radius:50%;display:grid;place-content:center;text-align:center}
.ring b{font-size:27px;color:var(--ink)}.ring small{font-size:11px;color:var(--muted)}
.stage{display:inline-block;background:#e8f0fe;color:#2458a6;border-radius:12px;padding:4px 9px;font-size:11px;font-weight:650}
body.dark .stage{background:#1e3358;color:#93c5fd}
.hero-copy h1{font-size:20px;margin:8px 0 5px;line-height:1.35}
.hero-copy p{font-size:13px;color:var(--muted);line-height:1.5}
.track{display:grid;grid-template-columns:repeat(4,1fr);gap:5px}
.track i{height:6px;border-radius:4px;background:var(--line)}
.track i.on{background:var(--blue)}
.note{margin-top:10px;padding-top:9px;border-top:1px solid var(--line);font-size:12px;color:var(--muted);line-height:1.6}

.recommend{margin-top:13px;width:100%;background:linear-gradient(120deg,#123a78,#2369c9);border-radius:18px;padding:16px;color:#fff;display:grid;grid-template-columns:46px 1fr auto;gap:12px;align-items:center;text-align:left;box-shadow:0 10px 22px rgba(18,58,120,.2)}
.rec-icon{width:46px;height:46px;border-radius:14px;background:rgba(255,255,255,.16);display:grid;place-items:center;font-size:19px}
.rec-copy{min-width:0}
.rec-copy small{display:block;opacity:.78;font-size:12px}
.rec-copy b{display:block;font-size:19px;margin:3px 0}
.rec-copy i{display:block;font-size:12px;opacity:.82;font-style:normal}
.rec-go{background:#fff;color:var(--navy);font-weight:750;border-radius:15px;padding:9px 12px;font-size:14px}

.sec-head{margin:20px 2px 10px;display:flex;justify-content:space-between;align-items:center}
.sec-head h2{font-size:17px}
.sec-head span,.sec-head button{font-size:12px;color:var(--muted)}

.metrics{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.m{background:var(--card);border-radius:16px;padding:14px;box-shadow:0 3px 12px rgba(24,55,92,.06);border-left:4px solid var(--blue)}
.m.amber{border-color:#f59e0b}.m.teal{border-color:#14b8a6}.m.violet{border-color:#8b5cf6}
.m small{color:var(--muted);font-size:14px}
.m b{display:block;font-size:24px;margin:5px 0 2px}
.m span{font-size:12px;color:var(--muted)}

.tools{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.t{border:1px solid var(--line);background:var(--card);border-radius:17px;padding:15px;text-align:left;min-height:108px;box-shadow:0 3px 12px rgba(24,55,92,.05)}
.t.primary{border-color:#bfdbfe}
.t i{width:34px;height:34px;border-radius:11px;background:#eaf2ff;color:var(--blue);display:grid;place-items:center;font-style:normal;font-weight:800}
body.dark .t i{background:#1e3358}
.t b{display:block;font-size:16px;margin:10px 0 4px}
.t small{color:var(--muted);font-size:12px;line-height:1.5}

.panel{background:var(--card);border-radius:16px;padding:14px;box-shadow:0 3px 12px rgba(24,55,92,.06)}
.empty{text-align:center;color:var(--muted);padding:14px;font-size:14px;line-height:1.6}
.hist{display:grid;grid-template-columns:1fr auto;gap:8px;padding:10px 0;border-bottom:1px solid var(--line)}
.hist:last-child{border:0}
.hist b{font-size:16px}.hist small{display:block;color:var(--muted);margin-top:4px;font-size:13px}
.hscore{font-size:19px;font-weight:800}.hscore.bad{color:var(--red)}
.foot{margin-top:14px;font-size:13px;color:var(--muted)}
.foot summary{font-weight:650}
.foot p{margin:8px 0;line-height:1.7}
.row-btns{display:flex;gap:10px;margin-top:8px}

.quiz-top{display:flex;justify-content:space-between;align-items:center;margin:2px 2px 9px;font-size:15px;gap:8px}
.quiz-top>div{display:flex;gap:8px;align-items:center}
.quiz-right{gap:10px}
.timer{background:#e8f0fe;color:#2458a6;border-radius:10px;padding:5px 9px;font-size:14px;font-weight:700;font-variant-numeric:tabular-nums}
.timer.warn{background:#fee2e2;color:var(--red)}
.mini{background:var(--card);width:36px;height:36px;border-radius:12px;font-size:26px;line-height:1;box-shadow:0 2px 8px rgba(24,55,92,.08)}
.bar{height:6px;background:var(--line);border-radius:6px;overflow:hidden;margin:0 2px 11px}
.bar i{display:block;height:100%;width:0;background:linear-gradient(90deg,#2563eb,#38bdf8);transition:.3s}
.qcard{background:var(--card);border-radius:20px;padding:17px;box-shadow:var(--shadow)}
.qmeta{display:flex;justify-content:space-between;align-items:flex-start;gap:8px}
.qmeta>div:first-child{display:flex;gap:6px;flex-wrap:wrap}
.qmeta-btns{display:flex;gap:6px;flex:0 0 auto}
.mini-act{width:38px;height:38px;border-radius:11px;background:#f4f7fb;font-size:18px}
body.dark .mini-act{background:#1e2b45}
.tag{font-size:12px;border-radius:12px;padding:4px 9px}
.t1{background:#e5efff;color:#2458a6}.t2{background:#eef2f7;color:var(--muted)}.t3{background:#fef3c7;color:#b45309}
body.dark .t1{background:#1e3358;color:#93c5fd}body.dark .t2{background:#1e2b45}
.stem{font-size:var(--stem);line-height:1.72;font-weight:620;margin:17px 0}
.opt{position:relative;width:100%;border:2px solid var(--line);background:var(--card);border-radius:14px;padding:15px 14px;margin-bottom:10px;text-align:left;font-size:var(--opt);line-height:1.6;color:#187dc8}
body.dark .opt{color:#93c5fd}
.opt.sel{border-color:var(--blue);background:#eef5ff}
body.dark .opt.sel{background:#1b2c4d}
.opt.right{border-color:var(--green);background:#f0fdf4;padding-right:82px}
body.dark .opt.right{background:#132e21}
.opt.wrong{border-color:var(--red);background:#fff1f2;padding-right:82px}
body.dark .opt.wrong{background:#33161c}
.mk{position:absolute;right:9px;top:50%;transform:translateY(-50%);font-size:11px;font-weight:750;padding:4px 7px;border-radius:9px}
.mk.got{color:var(--green);background:#dcfce7}.mk.miss{color:#b45309;background:#fef3c7}.mk.bad{color:var(--red);background:#fee2e2}
.verdict{font-size:18px;font-weight:800;margin:14px 0 4px}
.verdict.ok{color:var(--green)}.verdict.no{color:var(--red)}
.vsub{font-size:15px;line-height:1.7;color:var(--muted)}
.next-plan{margin-top:6px;font-size:13px}
.hint{margin-top:12px;background:#eff6ff;border-left:4px solid var(--blue);border-radius:10px;padding:13px;font-size:var(--body);line-height:1.75;color:#1e3a8a}
body.dark .hint{background:#16233d;color:#bfdbfe}
.peek{margin-top:12px;background:#f5f3ff;border-left:4px solid #8b5cf6;border-radius:10px;padding:13px;font-size:var(--body);line-height:1.7;color:#4c1d95}
.peek span{font-size:13px;color:#7c3aed}
body.dark .peek{background:#231b3d;color:#ddd6fe}
.expl{margin-top:13px;background:#fffbeb;border-left:4px solid #f59e0b;border-radius:10px;padding:13px;font-size:var(--body);line-height:1.78;color:#78350f}
body.dark .expl{background:#2c2410;color:#fde68a}
.qfoot{display:flex;gap:14px;margin-top:14px;padding-top:12px;border-top:1px solid var(--line)}
.link-btn{color:var(--muted);font-size:13px;padding:4px 0}
.mynote{margin-top:10px;background:#f0fdfa;border-left:4px solid #14b8a6;border-radius:10px;padding:12px;font-size:14px;line-height:1.7;color:#115e59}
body.dark .mynote{background:#0f2e2b;color:#99f6e4}
.quiz-actions{display:flex;gap:10px;margin-top:13px;position:sticky;bottom:8px}
.btn{border-radius:14px;padding:15px;font-size:17px;font-weight:700;flex:1}
.btn.ghost{background:#dfe7f1;color:#475569}
body.dark .btn.ghost{background:#243350;color:#cbd5e1}
.btn.solid{background:linear-gradient(120deg,#1d57bb,#2875e8);color:#fff;box-shadow:0 7px 16px rgba(37,99,235,.2)}
.btn.full{width:100%;margin-top:10px}

.rhero{background:var(--card);border-radius:22px;padding:22px;text-align:center;box-shadow:var(--shadow)}
.rhero small{color:var(--muted)}
.big{font-size:46px;font-weight:850;margin:8px 0}
.pass{color:var(--green)}.fail{color:var(--red)}
.rstats{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:13px}
.rstats div{background:var(--bg);border-radius:12px;padding:10px}
.rstats b{display:block;font-size:18px}.rstats small{font-size:11px;color:var(--muted)}
.all-right{text-align:center;color:var(--green);font-weight:700;margin:18px 0;font-size:16px}
.rev-title{font-size:16px;margin:18px 2px 10px}
.rev{background:var(--card);border-radius:17px;padding:15px;margin-bottom:10px;box-shadow:0 3px 12px rgba(24,55,92,.06)}
.rev .stem{font-size:17px;margin:9px 0}
.rev-d{font-size:14px;line-height:1.7}
.ract{display:flex;gap:10px;margin-top:13px}

.rhead{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.rhead h1{font-size:23px}.rhead p{font-size:14px;color:var(--muted);margin-top:4px}
.rcard{background:var(--card);border-radius:18px;padding:15px;margin-bottom:11px;box-shadow:var(--shadow)}
.rcard h2{font-size:19px;margin-bottom:12px}
.rtable{width:100%;border-collapse:collapse}
.rtable td{padding:12px 0;border-bottom:1px solid var(--line);font-size:17px}
.rtable td:last-child{text-align:right;font-weight:700}
.weak{display:grid;grid-template-columns:104px 1fr 52px;align-items:center;gap:9px;margin:13px 0}
.weak label{font-size:16px}
.weak .bar{margin:0;height:7px}
.weak strong{font-size:14px;text-align:right}

.chap{width:100%;display:flex;justify-content:space-between;align-items:center;gap:12px;background:var(--card);border-radius:16px;padding:14px;margin-bottom:10px;text-align:left;box-shadow:0 3px 12px rgba(24,55,92,.05)}
.chap-l{flex:1;min-width:0}
.chap-l b{font-size:16px}
.chap-l small{display:block;color:var(--muted);font-size:12px;margin:4px 0 8px}
.chap-l .bar{margin:0;height:6px}
.chap-l .bar i{background:var(--green)}
.chap-go{background:#e8f0fe;color:#2458a6;border-radius:12px;padding:9px 14px;font-weight:700;font-size:14px;flex:0 0 auto}
body.dark .chap-go{background:#1e3358;color:#93c5fd}

.search-box{display:flex;gap:9px;margin-bottom:12px}
.search-box input{flex:1}
.search-box .btn{flex:0 0 84px;padding:13px}
.search-count{color:var(--muted);font-size:13px;margin:10px 2px}
.srow{background:var(--card);border-radius:14px;padding:13px;margin-bottom:9px;box-shadow:0 2px 8px rgba(24,55,92,.05)}
.srow p{margin-top:8px;font-size:15px;line-height:1.65}
.ncard{background:var(--card);border-radius:16px;padding:14px;margin-bottom:10px;box-shadow:0 3px 12px rgba(24,55,92,.05)}
.nstem{font-size:15px;line-height:1.6;margin:8px 0;font-weight:600}
.ntext{background:#f0fdfa;border-left:4px solid #14b8a6;border-radius:8px;padding:11px;font-size:14px;line-height:1.7;color:#115e59}
body.dark .ntext{background:#0f2e2b;color:#99f6e4}

.sheet{position:fixed;inset:0;z-index:60;display:flex;align-items:flex-end}
.sheet-bg{position:absolute;inset:0;background:rgba(15,23,42,.45)}
.sheet-body{position:relative;width:100%;max-width:680px;margin:0 auto;background:var(--card);border-radius:22px 22px 0 0;padding:18px;padding-bottom:calc(18px + env(safe-area-inset-bottom));max-height:84vh;overflow:auto}
.sheet-body h3{font-size:18px;margin-bottom:12px}
.sheet-sub{color:var(--muted);font-size:13px;line-height:1.6;margin-bottom:12px}
.lrow{display:flex;justify-content:space-between;align-items:center;border:2px solid var(--line);border-radius:14px;padding:13px;margin-bottom:9px;gap:10px}
.lrow.on{border-color:var(--blue);background:#eff6ff}
body.dark .lrow.on{background:#1b2c4d}
.lrow.danger{border-color:var(--red);background:#fff5f5;flex-wrap:wrap}
.lrow-main{flex:1;min-width:0}
.lrow b{font-size:16px}.lrow small{display:block;color:var(--muted);font-size:12px;margin-top:3px}
.lrow .del{color:var(--red);font-size:14px;padding:10px 12px;flex:0 0 auto;border:1px solid #fecaca;border-radius:10px;background:var(--card)}
.del-actions{display:flex;gap:8px;width:100%;margin-top:10px}
.del-no{flex:1;background:#e2e8f0;color:#334155;border-radius:10px;padding:11px;font-size:15px;font-weight:650}
.del-yes{flex:1;background:var(--red);color:#fff;border-radius:10px;padding:11px;font-size:15px;font-weight:700}
.add-box{border-top:1px solid var(--line);margin-top:12px;padding-top:14px}
.bank-tip{color:var(--muted);font-size:12px;line-height:1.6;padding:10px 2px}

.set-row{display:flex;justify-content:space-between;align-items:center;padding:14px 0;border-bottom:1px solid var(--line);gap:12px}
.set-row.col{flex-direction:column;align-items:stretch;gap:9px}
.set-row span{font-size:15px}
.seg{display:flex;background:var(--bg);border-radius:12px;padding:3px;flex:0 0 auto}
.seg button{padding:8px 13px;border-radius:10px;font-size:14px;color:var(--muted)}
.seg button.on{background:var(--card);color:var(--blue);font-weight:700;box-shadow:0 1px 4px rgba(0,0,0,.08)}

.card-legend{display:flex;gap:14px;margin-bottom:12px;font-size:12px;color:var(--muted)}
.card-legend span{display:flex;align-items:center;gap:5px}
.dot{width:10px;height:10px;border-radius:3px;display:inline-block}
.dot.ok{background:var(--green)}.dot.no{background:var(--red)}.dot.undo{background:var(--line)}
.card-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:8px;margin-bottom:14px}
.cnum{aspect-ratio:1;border-radius:10px;background:var(--bg);font-size:14px;font-weight:650;border:2px solid transparent}
.cnum.ok{background:#dcfce7;color:#15803d}
.cnum.no{background:#fee2e2;color:#b91c1c}
.cnum.cur{border-color:var(--blue);color:var(--blue)}
.fb-opt{display:block;width:100%;text-align:left;border:2px solid var(--line);border-radius:12px;padding:13px;margin-bottom:8px;font-size:15px}
.fb-opt.on{border-color:var(--blue);background:#eff6ff;color:var(--blue);font-weight:650}
body.dark .fb-opt.on{background:#1b2c4d}

.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,18px);opacity:0;background:rgba(15,23,42,.92);color:#fff;padding:11px 17px;border-radius:20px;font-size:13px;z-index:80;transition:.25s;pointer-events:none;max-width:80vw;text-align:center;line-height:1.5}
.toast.show{opacity:1;transform:translate(-50%,0)}
@media(max-width:360px){.ring{width:96px;height:96px;flex-basis:96px}.t{padding:12px}.card-grid{grid-template-columns:repeat(5,1fr)}}

/* ---------- 访问门 ---------- */
.gate{position:fixed;inset:0;z-index:200;background:linear-gradient(150deg,#0d2c5e,#1f5fb9 55%,#2d7fd8);display:flex;align-items:center;justify-content:center;padding:22px}
.gate.hide{display:none!important}
.gate-card{width:100%;max-width:360px;background:var(--card);border-radius:24px;padding:30px 24px 24px;text-align:center;box-shadow:0 20px 50px rgba(6,26,58,.35)}
.gate-mark{width:62px;height:62px;margin:0 auto 14px;border-radius:19px;background:linear-gradient(140deg,#123a78,#2369c9);color:#fff;display:grid;place-items:center;font-size:32px;font-weight:800}
.gate-card h1{font-size:25px;letter-spacing:1px}
.gate-sub{color:var(--muted);font-size:14px;margin:6px 0 22px}
.gate-label{display:block;text-align:left;font-size:14px;color:var(--muted);margin-bottom:7px}
#gatePwd{width:100%;border:2px solid var(--line);border-radius:13px;padding:14px;font-size:19px;text-align:center;letter-spacing:2px;background:var(--card)}
#gatePwd:focus{outline:none;border-color:var(--blue)}
.gate .btn{margin-top:14px}
.gate-err{color:var(--red);font-size:14px;margin-top:11px;font-weight:600}
.gate-foot{color:var(--muted);font-size:12px;margin-top:18px;padding-top:14px;border-top:1px solid var(--line)}

/* ---------- 危险操作区 ---------- */
.danger-zone{border:1px solid #fecaca}
body.dark .danger-zone{border-color:#7f1d1d}
.danger-zone h2{color:var(--red)}
#exportBox{color:var(--ink)}

/* ---------- 上下分数排版 ---------- */
.frac{display:inline-flex;flex-direction:column;align-items:center;vertical-align:middle;margin:0 3px;line-height:1.15;font-size:.92em}
.frac .fnum{padding:0 4px;border-bottom:1.5px solid currentColor}
.frac .fden{padding:0 4px}

/* ---------- 解析分步展开 ---------- */
.expl-step{padding:7px 0;border-bottom:1px dashed rgba(180,140,50,.25);line-height:1.8}
.expl-step:last-of-type{border-bottom:none}
.step-btn{display:block;width:100%;margin-top:10px;padding:11px;border-radius:10px;background:#fef3c7;color:#92400e;font-size:15px;font-weight:650}
body.dark .step-btn{background:#3a2e12;color:#fde68a}

/* ---------- 进步条 ---------- */
.gain-bar{margin:12px auto 2px;display:inline-block;background:linear-gradient(120deg,#ecfdf5,#d1fae5);color:#065f46;border:1px solid #a7f3d0;border-radius:14px;padding:10px 18px;font-size:16px;line-height:1.6}
.gain-bar b{font-size:19px}
body.dark .gain-bar{background:#0b2e22;color:#6ee7b7;border-color:#134e3a}