:root{--c:#c8643b;--c2:#e8956d;--cl:#fbeee7;--ink:#2a2420;--mut:#7d726b;--bg:#faf7f4;--card:#fff;--line:#ece4dd;
--ok:#2e8b57;--okl:#e5f4ea;--bad:#c0392b;--badl:#fbe9e7;--warn:#b7791f;--warnl:#fdf3e1;--blue:#2f6fb0;--bluel:#e8f0fa;
--r:14px;--sh:0 2px 10px rgba(80,50,30,.08)}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:16px/1.6 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);padding-bottom:calc(70px + env(safe-area-inset-bottom))}
a{color:var(--c);text-decoration:none}
h1,h2,h3{line-height:1.3;margin:.2em 0 .5em}
h1{font-size:1.45rem}h2{font-size:1.2rem}h3{font-size:1.05rem}
p{margin:.4em 0}
.muted{color:var(--mut);font-size:.9em}
.small{font-size:.85em}
.hidden{display:none!important}
.wrap{max-width:820px;margin:0 auto;padding:12px 14px 30px}
.loading{padding:60px 0;text-align:center;color:var(--mut)}
/* top */
.topbar{position:sticky;top:0;z-index:30;display:flex;align-items:center;gap:10px;padding:8px 14px;padding-top:calc(8px + env(safe-area-inset-top));background:rgba(255,255,255,.95);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.brand{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--ink);flex:1;min-width:0}
.logo{display:inline-grid;place-items:center;width:30px;height:30px;border-radius:9px;background:var(--c);color:#fff;font-size:17px}
.bname{white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.studyclock{display:flex;align-items:center;gap:6px;cursor:pointer}
.ring{width:34px;height:34px;transform:rotate(-90deg)}
.ring circle{fill:none;stroke-width:4}
.ring-bg{stroke:var(--line)}.ring-fg{stroke:var(--c);stroke-linecap:round;stroke-dasharray:97.4;stroke-dashoffset:97.4;transition:stroke-dashoffset .5s}
.sc-text{display:flex;flex-direction:column;line-height:1.1}
.sc-text b{font-variant-numeric:tabular-nums;font-size:.95rem}
.sc-text small{font-size:.7rem;color:var(--mut)}
.studyclock.running .sc-text small{color:var(--ok)}
.studyclock.paused .sc-text small{color:var(--bad)}
.streak{font-size:.95rem;background:var(--cl);padding:3px 9px;border-radius:20px;white-space:nowrap}
.streak.cold{filter:grayscale(1);opacity:.7}
/* bottom nav */
.bottomnav{position:fixed;left:0;right:0;bottom:0;z-index:30;display:flex;background:#fff;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom)}
.bottomnav a{flex:1;display:flex;flex-direction:column;align-items:center;padding:6px 0 5px;color:var(--mut);font-size:.72rem}
.bottomnav a i{font-style:normal;font-size:1.2rem;line-height:1.3}
.bottomnav a.on{color:var(--c);font-weight:600}
@media(min-width:900px){.bottomnav{top:58px;bottom:auto;left:calc(50% - 560px);right:auto;width:120px;flex-direction:column;border:0;background:none}
 .bottomnav a{flex:none;flex-direction:row;gap:8px;font-size:.95rem;padding:10px}body{padding-bottom:20px}}
/* cards */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:14px 16px;margin:12px 0;box-shadow:var(--sh)}
.card.flat{box-shadow:none}
.card.hl{border-color:var(--c2);background:linear-gradient(180deg,#fff, #fff8f4)}
.row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.row.sb{justify-content:space-between}
.grow{flex:1}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
@media(max-width:420px){.grid3{grid-template-columns:1fr 1fr}}
.stat{background:var(--bg);border-radius:12px;padding:10px;text-align:center}
.stat b{display:block;font-size:1.35rem;color:var(--c)}
.stat span{font-size:.78rem;color:var(--mut)}
/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:11px;padding:9px 15px;font:inherit;font-size:.95rem;cursor:pointer;min-height:42px;transition:transform .05s}
.btn:active{transform:scale(.97)}
.btn.primary{background:var(--c);border-color:var(--c);color:#fff;font-weight:600}
.btn.ok{background:var(--ok);border-color:var(--ok);color:#fff}
.btn.bad{background:var(--bad);border-color:var(--bad);color:#fff}
.btn.warn{background:var(--warn);border-color:var(--warn);color:#fff}
.btn.ghost{background:transparent}
.btn.big{padding:13px 22px;font-size:1.05rem;min-height:52px;width:100%}
.btn.sm{padding:4px 10px;min-height:32px;font-size:.85rem}
.btn[disabled]{opacity:.45;pointer-events:none}
.btns{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.btns .btn{flex:1}
.tag{display:inline-block;font-size:.75rem;padding:1px 8px;border-radius:20px;background:var(--bg);border:1px solid var(--line);color:var(--mut);white-space:nowrap}
.tag.ok{background:var(--okl);color:var(--ok);border-color:#bfe3cc}
.tag.warn{background:var(--warnl);color:var(--warn);border-color:#f0d9ad}
.tag.bad{background:var(--badl);color:var(--bad);border-color:#f2c6c0}
.tag.blue{background:var(--bluel);color:var(--blue);border-color:#c7d9ef}
.tag.c{background:var(--cl);color:var(--c);border-color:#f2cdbb}
/* hero */
.hero{background:linear-gradient(135deg,var(--c),#a84a26);color:#fff;border-radius:18px;padding:18px;margin:12px 0;box-shadow:var(--sh)}
.hero .big{font-size:2.6rem;font-weight:800;line-height:1}
.hero small{opacity:.85}
.hero .sub{opacity:.92;font-size:.92rem;margin-top:6px}
.hero a{color:#fff;text-decoration:underline}
/* stepper */
.stepper{display:flex;gap:4px;margin:6px 0 4px}
.step{flex:1;text-align:center;position:relative;padding-top:38px;font-size:.8rem;color:var(--mut)}
.step .dot{position:absolute;top:0;left:50%;transform:translateX(-50%);width:32px;height:32px;border-radius:50%;display:grid;place-items:center;background:var(--bg);border:2px solid var(--line);font-weight:700;color:var(--mut);z-index:1}
.step:not(:last-child)::after{content:"";position:absolute;top:15px;left:calc(50% + 18px);right:calc(-50% + 18px);height:2px;background:var(--line)}
.step.done .dot{background:var(--ok);border-color:var(--ok);color:#fff}
.step.done:not(:last-child)::after{background:var(--ok)}
.step.cur .dot{background:var(--c);border-color:var(--c);color:#fff;box-shadow:0 0 0 4px var(--cl)}
.step.cur{color:var(--c);font-weight:700}
.step.locked .dot::after{content:"🔒";position:absolute;font-size:10px;right:-6px;top:-6px}
a.step{color:inherit}
/* progress */
.bar{height:8px;border-radius:8px;background:var(--line);overflow:hidden}
.bar i{display:block;height:100%;background:var(--c);border-radius:8px;transition:width .3s}
.bar.ok i{background:var(--ok)}
/* phase map */
.phases{display:flex;gap:6px}
.ph{flex:1;border-radius:10px;padding:7px 6px;background:var(--bg);font-size:.75rem;text-align:center;border:1px solid var(--line)}
.ph b{display:block;font-size:.85rem}
.ph.now{background:var(--cl);border-color:var(--c2)}
.ph.past{opacity:.7}
/* word card */
.wcard{text-align:center;padding:26px 16px;min-height:300px;display:flex;flex-direction:column;justify-content:center;gap:6px}
.wcard .w{font-size:2.3rem;font-weight:800;letter-spacing:.5px;word-break:break-word}
.wcard .ph{background:none;border:0;font-size:1rem;color:var(--mut)}
.wcard .mean{font-size:1.15rem;margin-top:8px}
.wcard .ex{background:var(--bg);border-radius:12px;padding:10px 12px;text-align:left;margin-top:8px}
.wcard .ex .en{font-size:1.02rem}
.kind{position:absolute;top:10px;left:12px}
.rel{position:relative}
.grades{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-top:12px}
.grades .btn{flex-direction:column;gap:0;min-height:60px}
.grades .btn small{font-weight:400;font-size:.72rem;opacity:.85}
.playbtn{border:0;background:var(--cl);color:var(--c);border-radius:50%;width:38px;height:38px;font-size:1rem;cursor:pointer;vertical-align:middle}
.playbtn.sm{width:28px;height:28px;font-size:.8rem}
.kbd{font-size:.72rem;color:var(--mut)}
/* quiz */
.opts{display:flex;flex-direction:column;gap:8px;margin:10px 0}
.opt{display:flex;gap:10px;align-items:flex-start;text-align:left;border:1.5px solid var(--line);background:#fff;border-radius:12px;padding:10px 12px;cursor:pointer;font:inherit;color:inherit;width:100%}
.opt b{flex:none;width:24px;height:24px;border-radius:50%;background:var(--bg);display:grid;place-items:center;font-size:.8rem}
.opt.sel{border-color:var(--c);background:var(--cl)}
.opt.sel b{background:var(--c);color:#fff}
.opt.right{border-color:var(--ok);background:var(--okl)}
.opt.right b{background:var(--ok);color:#fff}
.opt.wrong{border-color:var(--bad);background:var(--badl)}
.opt.wrong b{background:var(--bad);color:#fff}
.opt[disabled]{cursor:default}
.optgrid{display:grid;grid-template-columns:repeat(5,1fr);gap:6px}
.optgrid .opt{justify-content:center;padding:8px 4px;flex-direction:column;align-items:center;gap:2px}
.optgrid .opt span{font-size:.72rem;word-break:break-all}
@media(max-width:480px){.optgrid{grid-template-columns:repeat(3,1fr)}}
.fb{border-radius:12px;padding:10px 12px;margin-top:8px;white-space:pre-wrap;font-size:.92rem}
.fb.ok{background:var(--okl)}.fb.bad{background:var(--badl)}.fb.info{background:var(--bluel)}
.q{border-top:1px dashed var(--line);padding-top:10px;margin-top:10px}
.q:first-child{border-top:0;margin-top:0}
.qn{display:inline-block;min-width:30px;font-weight:700;color:var(--c)}
input[type=text],input[type=number],input[type=time],textarea,select{font:inherit;border:1.5px solid var(--line);border-radius:10px;padding:9px 11px;width:100%;background:#fff;color:inherit}
textarea{min-height:200px;line-height:1.6}
input:focus,textarea:focus{outline:none;border-color:var(--c)}
label.ck{display:flex;gap:8px;align-items:flex-start;padding:6px 0;cursor:pointer}
label.ck input{margin-top:5px;width:18px;height:18px;flex:none}
/* passage */
.passage{background:#fffdfb;border:1px solid var(--line);border-radius:12px;padding:12px 14px;font-family:Georgia,"Times New Roman",serif;font-size:1.02rem;line-height:1.75;max-height:60vh;overflow:auto}
.passage p{margin:.5em 0;text-indent:1.5em}
.passage .pl{font-family:sans-serif;font-weight:700;color:var(--c);margin-right:4px}
.blank{display:inline-block;min-width:56px;border-bottom:2px solid var(--c);text-align:center;font-family:sans-serif;font-size:.85rem;color:var(--c);padding:0 4px;cursor:pointer;text-indent:0}
.blank.filled{background:var(--cl)}
.blank.cur{background:var(--c);color:#fff;border-radius:4px}
.split{display:grid;gap:12px}
@media(min-width:900px){.split{grid-template-columns:1.1fr 1fr}.split .passage{max-height:75vh}}
.script{font-size:.9rem;background:var(--bg);border-radius:10px;padding:8px 10px;max-height:300px;overflow:auto}
.script p{margin:.25em 0}
.script .zh{color:var(--mut);font-size:.85rem}
/* walk */
.walk{list-style:none;padding:0;margin:8px 0;counter-reset:w}
.walk li{position:relative;padding:8px 10px 8px 40px;border-left:2px solid var(--line);margin-left:14px;animation:fadein .35s}
.walk li::before{counter-increment:w;content:counter(w);position:absolute;left:-14px;top:8px;width:26px;height:26px;border-radius:50%;background:var(--c);color:#fff;display:grid;place-items:center;font-size:.8rem;font-weight:700}
.walk li b{color:var(--c)}
.walk li div{white-space:pre-wrap}
@keyframes fadein{from{opacity:0;transform:translateY(6px)}to{opacity:1}}
.lsteps{padding-left:1.3em}.lsteps li{margin:6px 0}
/* audio player */
.player{border:1px solid var(--line);border-radius:12px;padding:10px 12px;background:var(--bluel);margin:8px 0}
.player .row{gap:8px}
.player .pt{font-variant-numeric:tabular-nums;font-size:.85rem;color:var(--mut)}
.player .src{font-size:.75rem;color:var(--mut)}
.player.missing{background:var(--warnl)}
/* pomodoro */
.pomo{position:fixed;right:12px;bottom:calc(76px + env(safe-area-inset-bottom));z-index:40;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 6px 24px rgba(0,0,0,.15);padding:10px 12px;min-width:170px}
.pomo .pt{font-size:1.6rem;font-weight:800;font-variant-numeric:tabular-nums;text-align:center;color:var(--c)}
.pomo.brk .pt{color:var(--ok)}
.pomo .pl{font-size:.75rem;text-align:center;color:var(--mut)}
.pomo .btns{margin-top:4px}.pomo .btn{min-height:30px;padding:3px 8px;font-size:.8rem}
.pomo.min{min-width:0;padding:6px 10px;cursor:pointer}
.pomo.min .pt{font-size:1rem}
@media(min-width:900px){.pomo{bottom:20px}}
/* overlay */
.overlay{position:fixed;inset:0;background:rgba(30,20,15,.55);z-index:60;display:grid;place-items:center;padding:20px;backdrop-filter:blur(3px)}
.ov-card{background:#fff;border-radius:18px;padding:24px;max-width:360px;width:100%;text-align:center}
.ov-icon{font-size:2.5rem}
.toast{position:fixed;left:50%;bottom:calc(90px + env(safe-area-inset-bottom));transform:translateX(-50%) translateY(20px);background:#2a2420;color:#fff;padding:9px 16px;border-radius:22px;font-size:.9rem;opacity:0;transition:.25s;z-index:70;pointer-events:none;max-width:90vw;text-align:center}
.toast.show{opacity:1;transform:translateX(-50%)}
/* celebrate */
.celebrate{position:fixed;inset:0;z-index:65;display:grid;place-items:center;background:rgba(255,255,255,.7);padding:20px}
.celebrate .cc{background:#fff;border-radius:20px;padding:26px;text-align:center;box-shadow:0 10px 40px rgba(0,0,0,.2);max-width:360px;width:100%;animation:pop .4s}
.celebrate .cc .e{font-size:3.4rem}
@keyframes pop{0%{transform:scale(.6);opacity:0}70%{transform:scale(1.05)}100%{transform:scale(1);opacity:1}}
.confetti{position:fixed;top:-10px;width:9px;height:14px;z-index:66;animation:fall linear forwards;pointer-events:none}
@keyframes fall{to{transform:translateY(105vh) rotate(720deg)}}
/* lists */
.list{list-style:none;margin:0;padding:0}
.list li{padding:10px 0;border-bottom:1px solid var(--line)}
.list li:last-child{border-bottom:0}
.task{display:flex;gap:12px;align-items:flex-start;padding:12px;border:1px solid var(--line);border-radius:12px;margin:8px 0;background:#fff;color:inherit}
.task .ti{flex:none;width:36px;height:36px;border-radius:10px;background:var(--cl);display:grid;place-items:center;font-size:1.1rem}
.task.done{background:var(--okl);border-color:#bfe3cc}
.task.done .ti{background:var(--ok);color:#fff}
.task .tt{flex:1;min-width:0}
.task .tt div{font-size:.92rem}
.cal{display:grid;grid-template-columns:repeat(7,1fr);gap:5px}
.cal .cd{aspect-ratio:1;border-radius:10px;background:#fff;border:1px solid var(--line);display:flex;flex-direction:column;align-items:center;justify-content:center;font-size:.8rem;color:inherit;position:relative}
.cal .cd small{font-size:.62rem;color:var(--mut)}
.cal .cd.today{border:2px solid var(--c)}
.cal .cd.full{background:var(--ok);color:#fff}.cal .cd.full small{color:#e6f4ea}
.cal .cd.part{background:var(--warnl)}
.cal .cd.miss{background:var(--badl)}
.cal .cd.exam{background:var(--c);color:#fff}
.cal .wh{text-align:center;font-size:.75rem;color:var(--mut)}
.badges{display:grid;grid-template-columns:repeat(auto-fill,minmax(96px,1fr));gap:8px}
.badge{text-align:center;padding:10px 6px;border-radius:12px;background:var(--bg);border:1px solid var(--line);font-size:.8rem}
.badge b{display:block;font-size:.9rem}
.badge.off{opacity:.4;filter:grayscale(1)}
.wlist .wr{display:flex;gap:8px;align-items:center;padding:8px 0;border-bottom:1px solid var(--line)}
.wlist .wr .ww{font-weight:700;min-width:110px}
.wlist .wr .wm{flex:1;font-size:.88rem;color:var(--mut)}
.chips{display:flex;gap:6px;flex-wrap:wrap}
.chip{padding:5px 11px;border-radius:20px;border:1px solid var(--line);background:#fff;font-size:.85rem;cursor:pointer;color:inherit}
.chip.on{background:var(--c);color:#fff;border-color:var(--c)}
.sumcard{background:linear-gradient(160deg,#fff7f2,#fff);border:2px solid var(--c2);border-radius:18px;padding:18px}
.onb{text-align:center;padding:20px 10px}
.onb .e{font-size:3rem}
.dots{display:flex;gap:6px;justify-content:center;margin:12px 0}
.dots i{width:8px;height:8px;border-radius:50%;background:var(--line)}
.dots i.on{background:var(--c);width:20px;border-radius:4px}
.notice{border-radius:12px;padding:10px 12px;background:var(--warnl);font-size:.9rem;margin:8px 0}
.notice.blue{background:var(--bluel)}
.notice.ok{background:var(--okl)}
.sticky-bottom{position:sticky;bottom:calc(64px + env(safe-area-inset-bottom));background:linear-gradient(transparent,var(--bg) 30%);padding-top:14px;z-index:5}
@media(min-width:900px){.sticky-bottom{bottom:0}}
.spell{font-size:1.4rem;text-align:center;letter-spacing:1px}
details summary{cursor:pointer;color:var(--c);font-size:.92rem;padding:4px 0}
.pre{white-space:pre-wrap}
/* v2 补充 */
.exv:empty{display:none}.exv .fb{margin-top:6px}
.wrow{padding:8px 0;border-bottom:1px solid var(--line,#eee);display:grid;grid-template-columns:auto 1fr auto;gap:2px 8px;align-items:center}
.wrow .small{grid-column:2/3}
.cal.behind{border-left:4px solid #d9534f}.cal.future{opacity:.65}
.ti{flex:0 0 auto}

@media(max-width:899px){.pomo{bottom:auto;top:calc(62px + env(safe-area-inset-top));right:8px}.pomo.min{padding:4px 10px;opacity:.95}}