/* 雅思 7.5 · v5
   方向：编辑感黑白 + 低饱和色块（leonxlnx/minimalist-skill）
   细节：像素格 / 任务行 / 大数字卡（Beautiful UI）
   约束：去 AI 味清单（leonxlnx/taste-skill）
   圆角规则：面板 12px，按钮与输入框 8px，标签全圆角 */
@font-face{font-family:"Newsreader";src:url(fonts/newsreader.woff2) format("woff2");font-weight:200 800;font-style:normal;font-display:swap}
@font-face{font-family:"Newsreader";src:url(fonts/newsreader-italic.woff2) format("woff2");font-weight:200 800;font-style:italic;font-display:swap}
@font-face{font-family:"Geist";src:url(fonts/geist.woff2) format("woff2");font-weight:100 900;font-display:swap}
@font-face{font-family:"Geist Mono";src:url(fonts/geist-mono.woff2) format("woff2");font-weight:100 900;font-display:swap}

:root{
  --sans:"Geist",-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Noto Sans CJK SC","Microsoft YaHei",sans-serif;
  --serif:"Newsreader","Songti SC","Noto Serif CJK SC","Source Han Serif SC",Georgia,serif;
  --mono:"Geist Mono",ui-monospace,SFMono-Regular,Menlo,monospace;
  --bg:#fcfcfb; --surface:#ffffff; --ink:#161615; --ink2:#3b3b38; --muted:#787774; --faint:#a5a49f;
  --line:#ececE8; --line2:#dcdcd7; --acc:#ff5a1f; --acc-ink:#c43e0c; --mark:#ffe7a0;
  --shadow:0 1px 2px rgba(22,22,21,.04),0 8px 24px rgba(22,22,21,.04);
  --hdr:56px; --ease:cubic-bezier(.16,1,.3,1);
}
[data-theme=dark]{
  --bg:#121211; --surface:#1a1a19; --ink:#ededeb; --ink2:#cfcfcb; --muted:#9b9a96; --faint:#6c6b67;
  --line:#272725; --line2:#353532; --acc:#ff6a33; --acc-ink:#ff8a5c; --mark:rgba(255,196,64,.32);
  --shadow:0 1px 2px rgba(0,0,0,.3),0 8px 24px rgba(0,0,0,.25);
}
/* 版块色块：Notion / minimalist-skill 的低饱和色 */
.t-plan{--tb:#f1f1ef;--ti:#5f5e5b}
.t-grammar{--tb:#e1f3fe;--ti:#1f6c9f}
.t-dialogues{--tb:#fbf3db;--ti:#8a5c00}
.t-templates{--tb:#fbe9f1;--ti:#9c3b68}
.t-collocations{--tb:#edf3ec;--ti:#346538}
.t-mistakes{--tb:#fdebec;--ti:#9f2f2d}
[data-theme=dark] .t-plan{--tb:#242423;--ti:#b9b8b3}
[data-theme=dark] .t-grammar{--tb:#14273a;--ti:#86c6f0}
[data-theme=dark] .t-dialogues{--tb:#2e2612;--ti:#e9c46a}
[data-theme=dark] .t-templates{--tb:#311a26;--ti:#f0a3c6}
[data-theme=dark] .t-collocations{--tb:#18291a;--ti:#93cf98}
[data-theme=dark] .t-mistakes{--tb:#331a1a;--ti:#f3958f}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-padding-top:calc(var(--hdr) + 72px)}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.65 var(--sans);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
body.lock{overflow:hidden}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer}
.ph{width:1em;height:1em;flex:none}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:0}
.muted{color:var(--muted)}
.en,.en .v{font-family:var(--serif)}
mark{background:var(--mark);color:inherit;border-radius:2px;padding:0 1px}
#sentinel{position:absolute;top:0;height:1px;width:1px}
:focus-visible{outline:2px solid var(--acc);outline-offset:2px;border-radius:4px}

/* ---------- 顶栏 ---------- */
.top{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:saturate(1.4) blur(14px);-webkit-backdrop-filter:saturate(1.4) blur(14px);border-bottom:1px solid transparent;transition:border-color .2s}
.top.scrolled{border-color:var(--line)}
.top-in{max-width:1160px;margin:0 auto;height:var(--hdr);display:flex;align-items:center;gap:20px;padding:0 20px;padding-top:env(safe-area-inset-top)}
.logo{display:flex;align-items:center;gap:10px;flex:none}
.mark{width:22px;height:22px;border-radius:6px;background:var(--ink);position:relative}
.mark i{position:absolute;right:3px;bottom:3px;width:7px;height:7px;border-radius:2px;background:var(--acc)}
.wm{font-weight:700;font-size:16px;letter-spacing:-.01em;display:flex;align-items:baseline;gap:6px}
.wm em{font:italic 400 16px var(--serif);color:var(--muted)}
.m-title{display:none;font-weight:650;font-size:16px}
.tabs{display:flex;gap:2px;flex:1;min-width:0}
.tabs a{padding:6px 10px;font-size:14px;color:var(--muted);border-radius:6px;position:relative;white-space:nowrap;transition:color .15s}
.tabs a:hover{color:var(--ink)}
.tabs a.on{color:var(--ink);font-weight:600}
.tabs a.on::after{content:"";position:absolute;left:10px;right:10px;bottom:-11px;height:2px;background:var(--acc);border-radius:2px}
.top-r{display:flex;align-items:center;gap:12px;margin-left:auto}
.top-prog{font-size:13px;color:var(--muted)}
.top-prog b{color:var(--ink);font-weight:600}
.icon{width:36px;height:36px;display:grid;place-items:center;border-radius:8px;font-size:18px;color:var(--ink2);transition:background .15s}
.icon:hover{background:var(--line)}

/* ---------- 布局 ---------- */
main{max-width:1160px;margin:0 auto;padding:0 20px 120px}
.sec-h{font-size:13px;font-weight:600;color:var(--muted);margin:0 0 14px;letter-spacing:.02em}

/* ---------- 首页 hero ---------- */
.hero{display:grid;grid-template-columns:1.3fr 1fr;gap:56px;align-items:end;padding:56px 0 8px}
.date{font-size:12.5px;color:var(--muted);margin:0 0 14px;white-space:pre}
.hero h1{font-size:44px;line-height:1.2;letter-spacing:-.025em;font-weight:700;margin:0}
.hero h1 .big{font:italic 400 1.5em/0.8 var(--serif);color:var(--acc);letter-spacing:-.02em;padding:0 .04em;display:inline-block;transform:translateY(.04em)}
.lede{color:var(--muted);font-size:15px;margin:16px 0 0;max-width:46ch}
.tools{display:flex;gap:10px;align-items:center;margin-top:28px;flex-wrap:wrap}
.search{flex:1;min-width:220px;display:flex;align-items:center;gap:10px;height:46px;padding:0 12px 0 14px;background:var(--surface);border:1px solid var(--line2);border-radius:8px;transition:border-color .15s,box-shadow .15s}
.search:focus-within{border-color:var(--ink);box-shadow:0 0 0 3px color-mix(in srgb,var(--ink) 8%,transparent)}
.search .ph{font-size:17px;color:var(--muted)}
.search input{flex:1;min-width:0;border:0;outline:0;background:none;font:15px var(--sans);color:var(--ink)}
.search input::placeholder{color:var(--faint)}
.search input::-webkit-search-cancel-button{display:none}
.kbd{font:500 11px var(--mono);color:var(--muted);border:1px solid var(--line2);background:var(--bg);border-radius:4px;padding:1px 6px}
.search:focus-within .kbd,.search:has(input:not(:placeholder-shown)) .kbd{display:none}
.clr{color:var(--muted);font-size:15px;display:grid;place-items:center;width:26px;height:26px;border-radius:6px}
.clr:hover{background:var(--line)}
.tg{display:flex;align-items:center;gap:8px;height:46px;padding:0 4px;font-size:14px;color:var(--ink2);white-space:nowrap}
.sw{width:30px;height:18px;border-radius:999px;background:var(--line2);position:relative;transition:background .2s var(--ease)}
.sw i{position:absolute;top:2px;left:2px;width:14px;height:14px;border-radius:50%;background:var(--surface);box-shadow:0 1px 2px rgba(0,0,0,.2);transition:transform .25s var(--ease)}
.tg.on .sw{background:var(--ink)}
.tg.on .sw i{transform:translateX(12px)}
.toc-b{display:none}

/* 今日像素格（Beautiful UI 的 pixel-grid loader） */
.pix-card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:20px;box-shadow:var(--shadow)}
.pix-h{display:flex;justify-content:space-between;align-items:baseline;font-size:14px;color:var(--muted);margin-bottom:16px}
.pix-h b{color:var(--ink);font-weight:600;margin-left:6px;font-size:15px}
.lnk{display:inline-flex;align-items:center;gap:4px;font-size:13.5px;color:var(--ink2);font-weight:500}
.lnk:hover{color:var(--acc-ink)}
.lnk .ph{font-size:13px}
.pix{display:grid;grid-template-columns:repeat(9,1fr);gap:6px}
.pix.wide{grid-template-columns:repeat(17,1fr);max-width:620px;margin-top:22px}
.px{aspect-ratio:1;border-radius:4px;background:var(--tb);box-shadow:inset 0 0 0 1px color-mix(in srgb,var(--ti) 22%,transparent);transition:transform .2s var(--ease),background .2s}
.px:hover{transform:scale(1.12)}
.px.on{background:var(--ti);box-shadow:none}
.pix-leg{display:flex;flex-wrap:wrap;gap:6px 14px;margin-top:16px;font-size:12.5px;color:var(--muted)}
.pix-leg span{display:inline-flex;align-items:center;gap:6px}
.sq{width:9px;height:9px;border-radius:2px;background:var(--ti)}

/* ---------- 首页 主体 ---------- */
.home-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:56px;margin-top:56px;align-items:start}
.tasks{background:var(--surface);border:1px solid var(--line);border-radius:12px;overflow:hidden}
.task.card{display:grid;grid-template-columns:auto 1fr auto;gap:14px;align-items:center;padding:14px 16px;border-bottom:0;cursor:pointer;transition:background .15s}
.task.card .tag{margin:0}
.task + .task{border-top:1px solid var(--line)}
.task:hover{background:color-mix(in srgb,var(--line) 45%,transparent)}
.task-t{min-width:0}
.task-t b{display:block;font-weight:600;font-size:15px;line-height:1.4;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.task-t b.en{font:500 17px/1.35 var(--serif)}
.task-t small{display:block;color:var(--muted);font-size:13px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;margin-top:1px}
.task.done .task-t b{color:var(--muted);text-decoration:line-through;text-decoration-color:var(--faint)}
.row-f{display:flex;gap:10px;margin-top:16px;flex-wrap:wrap}
.b{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:42px;padding:0 18px;border-radius:8px;font-size:14.5px;font-weight:600;white-space:nowrap;transition:transform .1s,background .15s,border-color .15s}
.b:active{transform:scale(.98)}
.b.pri{background:var(--ink);color:var(--bg)}
.b.pri:hover{background:var(--ink2)}
.b.ghost{border:1px solid var(--line2);color:var(--ink);background:var(--surface)}
.b.ghost:hover{border-color:var(--faint)}
.b:disabled{opacity:.35;pointer-events:none}
.b.sq{width:42px;padding:0;font-size:18px}
.b.grow{flex:1}

.tag{display:inline-flex;align-items:center;height:20px;padding:0 8px;border-radius:999px;background:var(--tb);color:var(--ti);font-size:11.5px;font-weight:600;white-space:nowrap;flex:none}

.side{display:grid;gap:20px}
.stage,.score{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:20px}
.stage p.mono{font-size:12px;margin:0;white-space:pre}
.stage h3{font-size:24px;letter-spacing:-.02em;margin:6px 0 6px;line-height:1.25}
.stage-f{margin:0;color:var(--ink2);font-size:14px}
.seg{display:flex;gap:4px;margin-top:18px}
.seg i{flex:1;height:6px;border-radius:2px;background:var(--line)}
.seg i.past{background:var(--ink)}
.seg i.now{background:linear-gradient(90deg,var(--acc) var(--p),color-mix(in srgb,var(--acc) 22%,transparent) var(--p))}
.seg-l{display:flex;justify-content:space-between;font-size:12px;color:var(--muted);margin:8px 0 0}
.goal{margin:16px 0 0;padding-top:14px;border-top:1px solid var(--line);font-size:14px;display:flex;gap:10px;align-items:flex-start}
.goal .tag{margin-top:2px}
.score{display:grid;grid-template-columns:auto 1fr;gap:6px 24px;align-items:center}
.score-main{display:flex;flex-direction:column}
.sc-n{font:400 68px/0.9 var(--serif);letter-spacing:-.03em}
.sc-l{font-size:12.5px;color:var(--muted);margin-top:8px}
.score-sub{display:grid;grid-template-columns:repeat(4,1fr);gap:4px}
.score-sub span{display:flex;flex-direction:column;align-items:flex-start;padding-left:10px;border-left:1px solid var(--line)}
.score-sub b{font:400 24px/1.1 var(--serif)}
.score-sub small{font-size:12px;color:var(--muted)}
.score-p{grid-column:1/-1;margin:14px 0 0;padding-top:12px;border-top:1px solid var(--line);font-size:13.5px;color:var(--muted)}
.score-p b{color:var(--ink);font-weight:600}

/* 六个版块：不等大小色块 */
.sections-b{margin-top:64px}
.bento{display:grid;grid-template-columns:repeat(4,1fr);grid-auto-rows:minmax(150px,auto);gap:12px}
.tile{background:var(--tb);border-radius:12px;padding:18px 18px 20px;display:flex;flex-direction:column;gap:2px;color:var(--ti);transition:transform .25s var(--ease)}
.tile:hover{transform:translateY(-2px)}
.b-mistakes{grid-column:span 2;grid-row:span 2}
.b-collocations,.b-templates,.b-plan{grid-column:span 2}
.tile-top{display:flex;justify-content:space-between;align-items:center;margin-bottom:auto;padding-bottom:20px}
.tile-ic{font-size:20px;display:grid}
.tile-top .mono{font-size:12px}
.tile-en{font:400 28px/1.1 var(--serif);letter-spacing:-.02em;color:var(--ink)}
.b-mistakes .tile-en{font-size:52px}
.tile-zh{font-size:13.5px;font-weight:550}
.dots{display:flex;flex-wrap:wrap;gap:3px;margin-top:14px}
.dots i{width:5px;height:5px;border-radius:1.5px;background:color-mix(in srgb,var(--ti) 22%,transparent);transition:background .3s}
.dots i.on{background:var(--ti)}
.bento.compact{grid-template-columns:1fr 1fr;grid-auto-rows:auto}
.bento.compact .tile{grid-column:auto;grid-row:auto;min-height:118px}
.bento.compact .tile-en{font-size:22px}

.foot{margin:56px 0 0;font-size:13px;color:var(--muted)}
.foot .lnk{font-size:13px;margin-left:8px;text-decoration:underline;text-underline-offset:3px;color:var(--muted)}

/* ---------- 版块页头 ---------- */
.s-head{background:var(--tb);border-radius:12px;padding:40px 36px 30px;margin-top:24px;color:var(--ti)}
.s-en{font:400 76px/1 var(--serif);letter-spacing:-.035em;color:var(--ink);margin:0}
.s-zh{display:flex;align-items:baseline;gap:12px;font-size:16px;font-weight:600;margin:12px 0 0}
.s-zh .mono{font-size:12px;font-weight:400}
.s-head .lede{color:color-mix(in srgb,var(--ti) 80%,var(--ink))}
.s-prog{display:flex;align-items:flex-end;gap:20px;margin-top:26px}
.s-prog .dots{flex:1;margin:0}
.s-prog .dots i{width:6px;height:6px}
.s-num{display:flex;flex-direction:column;align-items:flex-end;font-size:12px;flex:none}
.s-num b{font:400 30px/1 var(--serif);color:var(--ink)}

.sec-grid{display:grid;grid-template-columns:1fr 230px;gap:56px;margin-top:8px}
.col-main{min-width:0}
.sticky{position:sticky;top:var(--hdr);z-index:5;background:var(--bg);padding:6px 0 10px;margin:0 -2px}
.sticky .tools{margin-top:10px}
.col-toc{position:relative}
.toc-box{position:sticky;top:calc(var(--hdr) + 24px);max-height:calc(100vh - var(--hdr) - 48px);overflow:auto;padding-top:24px}
.toc-h{font-size:12px;color:var(--muted);font-weight:600;margin:0 0 10px}
.toc a{display:block;font-size:13.5px;padding:5px 0 5px 12px;border-left:1px solid var(--line);color:var(--ink2);line-height:1.45}
.toc a:hover{border-color:var(--ink);color:var(--ink)}
.toc a.h3{padding-left:24px;font-size:12.5px;color:var(--muted)}
.toc-e{font-size:13px;color:var(--muted)}

/* ---------- 条目 ---------- */
.g-h{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin:44px 0 4px}
.g-h h2{font-size:21px;letter-spacing:-.015em;line-height:1.3;margin:0;display:flex;align-items:baseline;gap:12px;flex-wrap:wrap}
.g-h .no{font:italic 400 30px/1 var(--serif);color:var(--acc)}
.g-h .cnt{font-size:12px;color:var(--muted);font-weight:400}
.g-h .tag{align-self:center}
.g-h3{font-size:14px;color:var(--muted);margin:28px 0 0;font-weight:600}
.note{font-size:14px;color:var(--muted);margin:16px 0 4px;max-width:68ch}
.count{font-size:12.5px;color:var(--muted);margin:22px 0 0}
.cards{display:flex;flex-direction:column}
.card{display:grid;grid-template-columns:auto 1fr;gap:16px;padding:20px 4px;border-bottom:1px solid var(--line);cursor:pointer;position:relative;transition:background .15s}
.card:hover{background:color-mix(in srgb,var(--line) 32%,transparent)}
.card.flash{animation:flash 1.6s var(--ease)}
@keyframes flash{0%,40%{background:var(--mark)}}
.chk{width:22px;height:22px;border-radius:6px;border:1.5px solid var(--line2);display:grid;place-items:center;color:transparent;font-size:13px;margin-top:3px;background:var(--surface);transition:background .15s,border-color .15s,color .15s,transform .15s}
.chk:hover{border-color:var(--ink);color:var(--faint)}
.done > .chk{background:var(--ink);border-color:var(--ink);color:var(--bg)}
.task .chk{margin-top:0}
.pop > .chk{animation:pop .35s var(--ease)}
@keyframes pop{50%{transform:scale(1.2)}}
.card-in{min-width:0}
.card.done .card-in{opacity:.5}
.card .tag{margin-bottom:8px}
.card h4{font-size:17px;line-height:1.4;margin:0 0 6px;letter-spacing:-.01em}
.rich{font-size:15px;color:var(--ink2)}
.rich.clamp{display:-webkit-box;-webkit-line-clamp:5;-webkit-box-orient:vertical;overflow:hidden}
.rich ul,.rich ol{padding-left:20px;margin:6px 0}
.rich li{margin:2px 0}
.rich code{font:italic 400 16.5px var(--serif);color:var(--ink);background:none}
.rich b,.rich strong{color:var(--ink)}
.rich a{text-decoration:underline;text-underline-offset:3px}
.err{color:var(--t-err,#9f2f2d)}
.ok{color:var(--t-ok,#346538)}
[data-theme=dark]{--t-err:#f3958f;--t-ok:#93cf98}
.blank{background:var(--mark);border-radius:3px;padding:0 3px;font-family:var(--mono);font-size:.88em}
.more-l{display:inline-flex;align-items:center;gap:4px;font-size:13px;color:var(--muted);margin-top:6px;font-weight:500}
.lab{font-size:12px;color:var(--muted);font-weight:500;font-family:var(--sans);font-style:normal}
.lead .lab{display:block;margin-bottom:2px}
.lead .v{font-size:16.5px;font-weight:600;line-height:1.45}
.lead.en .v{font:500 22px/1.3 var(--serif);letter-spacing:-.01em;color:var(--ink)}
.rows{margin:10px 0 0;display:grid;gap:6px}
.row{display:grid;grid-template-columns:4.2em 1fr;gap:10px;align-items:baseline}
.row dt{margin:0}
.row dd{margin:0;font-size:14.5px;color:var(--ink2)}
.row.en dd{font:400 17px/1.45 var(--serif);color:var(--ink)}
/* 错题：编辑批改的样子 */
.k-mis .card-in{display:grid;gap:4px}
.m{display:grid;grid-template-columns:20px 1fr;gap:6px;align-items:baseline}
.mk{font-size:14px;font-weight:700}
.m.bad .mk{color:var(--t-err,#9f2f2d)}
.m.good .mk{color:var(--t-ok,#346538)}
.m.bad .v{font:400 17px/1.4 var(--serif);color:var(--muted);text-decoration:line-through;text-decoration-color:color-mix(in srgb,var(--t-err,#9f2f2d) 60%,transparent);text-decoration-thickness:1.5px}
.m.good .v{font:500 21px/1.35 var(--serif);color:var(--ink)}
.m.good .hl{background:linear-gradient(transparent 60%,color-mix(in srgb,var(--t-ok,#346538) 17%,transparent) 60%);-webkit-box-decoration-break:clone;box-decoration-break:clone;padding:0 2px}
.clr[hidden]{display:none}
.m.why{grid-template-columns:auto 1fr;gap:10px;margin-top:4px;font-size:13.5px;color:var(--muted)}
.m.why .lab{color:var(--faint)}
/* 对话：中文提示 + 英文 */
.pz{margin:0 0 4px;font-size:13px;color:var(--muted)}
.pe{font:400 20px/1.4 var(--serif);color:var(--ink)}

.empty{padding:48px 20px;text-align:center;display:flex;flex-direction:column;gap:4px;color:var(--muted);font-size:14px}
.empty b{color:var(--ink);font-size:17px}

/* ---------- 抽屉 ---------- */
.scrim{position:fixed;inset:0;z-index:40;background:rgba(10,10,9,.32);opacity:0;transition:opacity .3s}
.scrim.open{opacity:1}
.sheet{position:fixed;z-index:50;top:0;right:0;bottom:0;width:min(560px,100vw);background:var(--surface);border-left:1px solid var(--line);display:flex;flex-direction:column;transform:translateX(100%);transition:transform .38s var(--ease);visibility:hidden}
.sheet.open{transform:none;visibility:visible}
.grab{display:none}
.d-head{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:14px 16px 14px 24px;border-bottom:1px solid var(--line)}
.d-crumb{display:flex;align-items:center;gap:10px;font-size:13.5px;color:var(--ink2);min-width:0}
.d-path{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.d-crumb .mono{font-size:12px;flex:none}
.d-body{flex:1;overflow:auto;padding:28px 28px 40px;-webkit-overflow-scrolling:touch}
.d-t{font-size:24px;letter-spacing:-.02em;line-height:1.3;margin:0 0 14px}
.d-rich{font-size:16px;line-height:1.8}
.d-rich code{font-size:18px}
.d-cells.card{display:block;padding:0;border:0;cursor:default}
.d-cells.card:hover{background:none}
.d-cells .lead.en .v{font-size:30px}
.d-cells .row.en dd{font-size:20px}
.d-cells .m.good .v{font-size:28px}
.d-cells .m.bad .v{font-size:21px}
.d-cells .pe{font-size:28px}
.d-cells .rows{gap:12px;margin-top:20px}
.d-foot{display:flex;gap:10px;padding:14px 20px calc(14px + env(safe-area-inset-bottom));border-top:1px solid var(--line)}
.sheet.tocs .toc{padding:12px 24px 32px;overflow:auto}
.sheet.tocs .toc a{padding:10px 0 10px 14px;font-size:15px}

.toast{position:fixed;left:50%;bottom:32px;z-index:60;transform:translate(-50%,20px);background:var(--ink);color:var(--bg);font-size:13.5px;padding:9px 16px;border-radius:8px;opacity:0;pointer-events:none;transition:opacity .2s,transform .3s var(--ease)}
.toast.show{opacity:1;transform:translate(-50%,0)}

.bottom{display:none}

/* 进入动画：层级依次出现 */
@media (prefers-reduced-motion:no-preference){
  .hero-l,.pix-card,.tasks,.stage,.score,.s-head{animation:rise .7s var(--ease) both}
  .pix-card{animation-delay:.08s}.stage{animation-delay:.12s}.score{animation-delay:.18s}
  .px,.tile,.cards .card{animation:rise .6s var(--ease) both;animation-delay:calc(var(--i,0) * 35ms)}
  .px{animation-name:pxin}
}
@keyframes rise{from{opacity:0;transform:translateY(12px)}}
@keyframes pxin{from{opacity:0;transform:scale(.6)}}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}

/* ---------- 中屏 ---------- */
@media (max-width:1040px){
  .tabs a{padding:6px 7px}
  .top-prog{display:none}
}
@media (max-width:900px){
  .hero,.home-grid{grid-template-columns:1fr;gap:32px}
  .sec-grid{grid-template-columns:1fr}
  .col-toc{display:none}
  .toc-b{display:inline-flex;height:46px}
  .tabs{display:none}
}

/* ---------- 手机 ---------- */
@media (max-width:640px){
  :root{--hdr:52px}
  body{font-size:15px}
  .top-in{padding:0 14px 0 18px;padding-top:env(safe-area-inset-top)}
  body:not([data-page=home]) .logo .wm{display:none}
  body:not([data-page=home]) .m-title{display:block}
  .top-prog{display:inline;font-size:12.5px}
  main{padding:0 18px calc(96px + env(safe-area-inset-bottom))}
  .hero{padding-top:28px;gap:24px}
  .date{margin-bottom:10px}
  .hero h1{font-size:30px;line-height:1.28}
  .lede{font-size:14.5px;margin-top:12px}
  .tools{margin-top:20px;gap:8px}
  .search{min-width:0;flex-basis:100%;height:44px}
  .kbd{display:none}
  .tg{height:36px}
  .toc-b{height:36px;padding:0 12px;margin-left:auto}
  .pix-card{padding:16px}
  .pix{gap:5px}
  .pix.wide{grid-template-columns:repeat(9,1fr)}
  .home-grid{margin-top:36px}
  .task.card{padding:13px 14px;gap:12px}
  .row-f .b{flex:1}
  .sc-n{font-size:56px}
  .sections-b{margin-top:44px}
  .bento{grid-template-columns:1fr 1fr;grid-auto-rows:auto;gap:10px}
  .b-mistakes,.b-collocations{grid-column:span 2;grid-row:auto}
  .b-templates,.b-plan{grid-column:auto}
  .tile{min-height:132px;padding:16px}
  .tile-en{font-size:22px}
  .b-mistakes .tile-en{font-size:40px}
  .b-collocations .tile-en{font-size:30px}
  .tile:not(.b-mistakes):not(.b-collocations) .dots i{width:4px;height:4px}
  .s-head{margin:16px -18px 0;border-radius:0;padding:28px 18px 22px}
  .s-en{font-size:46px}
  .s-zh{font-size:15px}
  .s-prog{margin-top:20px;gap:14px}
  .s-prog .dots i{width:5px;height:5px}
  .s-num b{font-size:24px}
  .sticky{margin:0 -18px;padding:4px 18px 8px;border-bottom:1px solid var(--line)}
  .sticky .tools{margin-top:8px}
  .sticky .search{flex-basis:auto;flex:1 1 100%}
  .g-h{margin-top:36px}
  .g-h h2{font-size:19px}
  .g-h .no{font-size:26px}
  .card{padding:18px 0;gap:14px}
  .lead.en .v{font-size:20px}
  .m.good .v{font-size:19.5px}
  .m.bad .v{font-size:16px}
  .pe{font-size:19px}
  .row{grid-template-columns:3.6em 1fr}
  /* 底部导航 */
  .bottom{display:grid;grid-template-columns:repeat(5,1fr);position:fixed;left:0;right:0;bottom:0;z-index:30;background:color-mix(in srgb,var(--surface) 92%,transparent);backdrop-filter:saturate(1.4) blur(16px);-webkit-backdrop-filter:saturate(1.4) blur(16px);border-top:1px solid var(--line);padding:6px 4px calc(6px + env(safe-area-inset-bottom))}
  .bottom a{display:flex;flex-direction:column;align-items:center;gap:2px;padding:4px 0;font-size:11px;color:var(--muted)}
  .bottom .ph{font-size:23px}
  .bottom .ph.on{display:none}
  .bottom a.on{color:var(--ink);font-weight:600}
  .bottom a.on .ph.on{display:block}
  .bottom a.on .ph.off{display:none}
  .toast{bottom:calc(84px + env(safe-area-inset-bottom))}
  /* 抽屉变底部弹层 */
  .sheet{top:auto;left:0;width:100%;max-height:90vh;border-left:0;border-radius:16px 16px 0 0;transform:translateY(100%)}
  .grab{display:block;width:36px;height:4px;border-radius:2px;background:var(--line2);margin:8px auto 0}
  .d-head{padding:8px 12px 12px 20px}
  .d-body{padding:22px 20px 28px}
  .d-cells .lead.en .v,.d-cells .m.good .v,.d-cells .pe{font-size:25px}
}
/* 语法 / 模板页：正文行宽约 68ch */
.t-grammar .rich :is(p,li,blockquote),.t-templates .rich :is(p,li,blockquote),.t-grammar dd,.t-templates dd,
.d-sec-grammar :is(p,li,dd,blockquote),.d-sec-templates :is(p,li,dd,blockquote),
.gday-main :is(.gd-p,.gd-tip,.gd-ex li),.gday-h .srs-help{max-width:68ch}