/* 原神英语样式：提瓦特天空配色 + 系统字体 */
:root{
  --paper:#fbf8f1; --bg:#eef2f8; --card:#fff; --ink:#222a3a; --navy:#283a63; --muted:#66708a; --line:#d6dcea;
  --accent:#c08a2e; --accent-dark:#9a6a1c; --accent-soft:#f7ecd6;
  --green:#2f9c8f; --green-dark:#237a70; --soft-green:#dcf1ee;
  --blue:#4a78c2; --soft-blue:#e1e9f7; --yellow:#e3b341;
  --mint:#dcf1ee; --sky:#e1e9f7; --peach:#f6e6dc; --butter:#f8efd2; --lilac:#ebe3f6;
  --shadow:0 14px 28px rgba(34,42,58,.08); --shadow-sm:0 4px 12px rgba(34,42,58,.06);
  --r-lg:18px; --r-md:14px; --r-sm:10px;
  --font-ui:system-ui,-apple-system,"PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei",sans-serif;
  --font-story:ui-rounded,"SF Pro Rounded",system-ui,-apple-system,"PingFang SC","Noto Sans SC",sans-serif;
  --font-ipa:"Lucida Sans Unicode","Noto Sans",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font-ui);font-size:16px;line-height:1.6;-webkit-tap-highlight-color:transparent}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none;padding:0}
img{max-width:100%;display:block}
[hidden]{display:none!important}
.wrap{max-width:1180px;margin:0 auto;padding:0 16px}

/* ---------- top bar ---------- */
.topbar{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.92);backdrop-filter:saturate(1.4) blur(10px);border-bottom:1px solid var(--line)}
.topbar .wrap{display:flex;align-items:center;justify-content:space-between;height:58px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--navy)}
.brand small{display:block;font-size:11px;font-weight:600;color:var(--muted);letter-spacing:.04em;line-height:1}
.brand-mark{width:30px;height:30px;flex:none}
.nav{display:flex;gap:4px}
.nav a{padding:8px 12px;border-radius:10px;font-weight:700;font-size:15px;color:var(--navy);position:relative}
.nav a.active{color:var(--accent)}
.nav a.active:after{content:"";position:absolute;left:12px;right:12px;bottom:0;height:3px;border-radius:3px;background:var(--accent)}
.nav a:hover{background:#f1f4f9}
.menu-btn{display:none;font-weight:800;color:var(--navy);padding:8px}
@media (max-width:760px){
  .nav{display:none;position:absolute;top:58px;right:12px;flex-direction:column;background:#fff;border:1px solid var(--line);border-radius:14px;padding:8px;box-shadow:var(--shadow);min-width:150px}
  .nav.open{display:flex}
  .nav a.active:after{display:none}
  .menu-btn{display:block}
}

/* ---------- generic ---------- */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);box-shadow:var(--shadow-sm)}
.section-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin:30px 0 12px}
.section-head h2{margin:0;font-size:21px;color:var(--navy)}
.section-head h2 small{font-size:13px;color:var(--muted);font-weight:600;margin-left:8px}
.section-head .hint{font-size:13px;color:var(--muted)}
.pill{display:inline-flex;align-items:center;gap:4px;padding:2px 10px;border-radius:999px;font-size:12px;font-weight:700;line-height:20px;white-space:nowrap}
.pill.new{background:var(--accent-soft);color:var(--accent-dark)}
.pill.done{background:var(--soft-green);color:var(--green-dark)}
.pill.soon{background:#e9edf4;color:var(--muted)}
.pill.level{background:var(--soft-blue);color:#3a5f9e}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:10px 18px;border-radius:10px;font-weight:800;font-size:15px;transition:transform .12s,box-shadow .12s,background .12s}
.btn:active{transform:scale(.97)}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 14px rgba(192,138,46,.25)}
.btn-primary:hover{background:var(--accent-dark)}
.btn-ghost{background:#fff;border:1px solid var(--line);color:var(--navy)}
.btn-soft{background:var(--accent-soft);color:var(--accent-dark);border:1px solid #e8d3a8}
.btn-green{background:var(--green-dark);color:#fff}
.chip{display:inline-flex;align-items:center;min-height:40px;padding:6px 14px;border-radius:999px;border:1px solid var(--line);background:#fff;font-weight:700;font-size:14px;color:var(--navy);white-space:nowrap}
.chip.active{background:var(--navy);border-color:var(--navy);color:#fff}
.chips{display:flex;gap:8px;overflow-x:auto;padding-bottom:4px;scrollbar-width:none}
.chips::-webkit-scrollbar{display:none}

/* ---------- home ---------- */
.home-layout{display:grid;grid-template-columns:minmax(0,1fr);gap:24px;padding:18px 16px 60px}
@media (min-width:980px){.home-layout{grid-template-columns:230px minmax(0,1fr)}}
.side-nav{display:none}
@media (min-width:980px){.side-nav{display:block;position:sticky;top:76px;align-self:start;padding:18px 12px}}
.side-nav h3{margin:0 8px;font-size:17px;color:var(--navy)}
.side-nav .sub{margin:2px 8px 12px;font-size:12px;color:var(--muted)}
.side-nav a{display:flex;justify-content:space-between;align-items:center;padding:9px 10px;border-radius:10px;font-weight:700;font-size:14px;color:#2f3f5e;border-left:3px solid transparent}
.side-nav a span{font-size:12px;color:var(--muted);font-weight:600}
.side-nav a:hover{background:#f2f4f9}
.side-nav a.active{background:var(--accent-soft);color:var(--accent-dark);border-left-color:var(--accent)}

.hero{display:grid;grid-template-columns:1fr;gap:0;overflow:hidden;border:2px solid var(--accent);border-radius:var(--r-lg);background:#fff;box-shadow:var(--shadow)}
@media (min-width:700px){.hero{grid-template-columns:1.25fr 1fr;align-items:center}}
.hero-img{position:relative;background:linear-gradient(#9db9e6,var(--soft-blue));aspect-ratio:1600/520}
.hero-img img{width:100%;height:100%;object-fit:cover}
@media (min-width:700px){.hero-img{margin:12px;border-radius:12px;overflow:hidden}}
.hero-body{padding:16px 18px 18px}
.kicker{font-size:12px;font-weight:800;color:var(--green-dark);letter-spacing:.02em}
.hero-body h1{margin:4px 0 2px;font-size:28px;line-height:1.2;color:var(--navy);font-family:var(--font-story)}
.hero-body .zh{margin:0;color:#4a5570;font-weight:700}
.hero-body .meta{margin:6px 0 14px;color:var(--muted);font-size:13px}

.stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:14px}
.stat{padding:12px 14px}
.stat b{display:block;font-size:22px;color:var(--navy);line-height:1.2}
.stat span{font-size:12px;color:var(--muted);font-weight:700}
.bar{height:8px;border-radius:99px;background:#e8ecf4;overflow:hidden;margin-top:6px}
.bar i{display:block;height:100%;background:linear-gradient(90deg,var(--green),#6cb8ab);border-radius:99px;transition:width .6s}

.roadmap{padding:18px;background:linear-gradient(180deg,#eef3fb,#fff);border-color:#cee1f0}
.roadmap h3{margin:0;font-size:18px;color:var(--green-dark)}
.roadmap p{margin:2px 0 14px;font-size:13px;color:#5f6b7a}
.road{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;counter-reset:st}
@media (min-width:640px){.road{grid-template-columns:repeat(4,1fr)}}
@media (min-width:1100px){.road{grid-template-columns:repeat(7,1fr)}}
.stage{position:relative;padding:12px 10px 10px;border-radius:14px;border:1.5px solid rgba(40,58,99,.12);text-align:center;cursor:pointer;transition:transform .15s}
.stage:hover{transform:translateY(-2px)}
.stage .ic{font-size:26px;line-height:1.2}
.stage b{display:block;font-size:13px;color:var(--navy);margin-top:4px}
.stage small{display:block;font-size:12px;color:#5e6885}
.stage em{display:block;font-style:normal;font-size:11px;color:var(--muted);margin-top:2px}
.stage .bar{height:5px;margin-top:6px}
.stage.current{outline:3px solid var(--yellow);outline-offset:1px}
.stage .num{position:absolute;top:6px;left:8px;font-size:11px;font-weight:800;color:#8b93a8}
.bg-mint{background:var(--mint)} .bg-sky{background:var(--sky)} .bg-lilac{background:var(--lilac)} .bg-butter{background:var(--butter)} .bg-peach{background:var(--peach)}

.toolbar{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;margin-bottom:12px}
.search{display:flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--line);border-radius:999px;padding:4px 6px 4px 14px;min-width:220px;flex:1;max-width:320px}
.search input{border:0;outline:0;font:inherit;font-size:14px;flex:1;background:transparent;min-width:0}
.lesson-grid{display:grid;grid-template-columns:1fr;gap:14px}
@media (min-width:560px){.lesson-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:900px){.lesson-grid{grid-template-columns:repeat(3,1fr)}}
.lesson-card{display:flex;flex-direction:column;overflow:hidden;transition:transform .15s,box-shadow .15s}
.lesson-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.lesson-card .thumb{aspect-ratio:16/7;background:#e9edf4;position:relative;overflow:hidden}
.lesson-card .thumb img{width:100%;height:100%;object-fit:cover}
.lesson-card .body{padding:12px 14px 14px;display:flex;flex-direction:column;gap:4px;flex:1}
.lesson-card .no{font-size:12px;color:var(--muted);font-weight:700}
.lesson-card h4{margin:0;font-size:17px;line-height:1.3;color:var(--navy)}
.lesson-card .foot{margin-top:auto;padding-top:6px;display:flex;gap:6px;align-items:center}
.lesson-card.locked{opacity:.78}
.lesson-card.locked:hover{transform:none;box-shadow:var(--shadow-sm)}
.pixel-thumb{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:40px;
  background:linear-gradient(135deg,var(--sky),var(--lilac) 58%,var(--butter))}
.pixel-thumb:after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 72% 26%,rgba(255,255,255,.78),transparent 46%)}
.pixel-thumb span{position:relative;z-index:1;filter:drop-shadow(0 3px 6px rgba(40,58,99,.18))}
.more{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:16px;padding:16px 18px;background:var(--accent-soft);border-color:#e8d3a8}
.more b{color:var(--accent-dark)}
.footer{padding:24px 0 40px;text-align:center;color:var(--muted);font-size:12px}

/* ---------- lesson ---------- */
.lesson-head{padding:18px 0 6px;display:flex;gap:12px;align-items:flex-start}
.back{width:40px;height:40px;flex:none;display:grid;place-items:center;border-radius:12px;font-size:20px;color:var(--navy)}
.back:hover{background:#e9edf4}
.crumbs{font-size:13px;color:var(--muted);font-weight:700}
.lesson-head h1{margin:2px 0 0;font-size:clamp(26px,5vw,38px);line-height:1.15;color:var(--navy);font-family:var(--font-story)}
.head-actions{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0 0 50px}
.tabs{display:flex;gap:6px;border-bottom:1px solid var(--line);margin:14px 0 18px}
.tab{padding:10px 14px;font-weight:800;font-size:16px;color:var(--muted);position:relative}
.tab.active{color:var(--accent)}
.tab.active:after{content:"";position:absolute;left:8px;right:8px;bottom:-1px;height:3px;border-radius:3px;background:var(--accent)}
.study-layout{display:grid;grid-template-columns:1fr;gap:22px;padding-bottom:140px}
@media (min-width:980px){.study-layout{grid-template-columns:minmax(0,1fr) 340px;padding-bottom:60px}}
.side{display:flex;flex-direction:column;gap:14px}
@media (min-width:980px){.side{position:sticky;top:74px;align-self:start;max-height:calc(100vh - 90px);overflow:auto;scrollbar-width:thin}}

.article{padding:18px 18px 26px;background:var(--paper)}
@media (min-width:700px){.article{padding:26px 32px 32px}}
.article .cover{border-radius:14px;overflow:hidden;cursor:zoom-in;position:relative}
.article .cover .zoom-tip,.figure .zoom-tip{position:absolute;right:10px;bottom:10px;background:rgba(40,58,99,.72);color:#fff;font-size:12px;font-weight:700;padding:4px 10px;border-radius:999px}
.goal{margin:16px 0 8px;padding:12px 14px;border-radius:14px;background:var(--soft-green);border:1px solid #c9e6e0;font-size:15px}
.edition{display:flex;gap:6px;flex-wrap:wrap;margin:8px 0 4px}
.gloss-toggle > span:last-child{white-space:nowrap}
.gloss-toggle{display:flex;align-items:center;justify-content:space-between;gap:10px;margin:14px 0 0;padding:8px 12px;border-radius:12px;background:#f1f4f9;font-size:13px;color:#586180;font-weight:700}
.switch{position:relative;width:44px;height:26px;border-radius:99px;background:#ccd3e2;transition:background .2s;flex:none}
.switch:after{content:"";position:absolute;top:3px;left:3px;width:20px;height:20px;border-radius:50%;background:#fff;box-shadow:0 1px 3px rgba(0,0,0,.2);transition:transform .2s}
.switch[aria-checked=true]{background:var(--green)}
.switch[aria-checked=true]:after{transform:translateX(18px)}
.story{font-family:var(--font-story);font-size:18px;line-height:2.2;color:var(--ink)}
@media (min-width:700px){.story{font-size:19px}}
.story h2{font-family:var(--font-ui);font-size:21px;color:var(--navy);margin:28px 0 8px;display:flex;align-items:center;gap:8px}
.story h2:before{content:"";width:14px;height:14px;flex:none;background:var(--green);box-shadow:inset 0 -6px 0 var(--accent-dark);border-radius:2px}
.story p{margin:8px 0}
.story ol{margin:8px 0;padding-left:0;list-style:none;counter-reset:li}
.story ol li{counter-increment:li;position:relative;padding:6px 10px 6px 42px;margin:6px 0;background:#fff;border:1px solid #e7ebf3;border-radius:12px}
.story ol li:before{content:counter(li);position:absolute;left:10px;top:9px;width:22px;height:22px;border-radius:7px;background:var(--navy);color:#fff;font:800 13px/22px var(--font-ui);text-align:center}
.story .label{margin:14px 0 4px;font-family:var(--font-ui);font-weight:800;color:var(--accent-dark)}
.story strong{color:var(--navy)}
.figure{margin:16px 0;position:relative}
.figure .img{border-radius:14px;overflow:hidden;border:1px solid #dfe4ee;background:#f1f4fa;cursor:zoom-in;position:relative}
.figure .img img{width:100%;height:auto}
.figure figcaption{margin-top:6px;font-family:var(--font-story);font-size:16px;color:#3d4759;text-align:center}
.figure figcaption small{display:block;font-family:var(--font-ui);font-size:11px;color:#8b93a8}
.callout{margin:14px 0;padding:12px 14px;border-radius:14px;background:var(--butter);border:1px solid #e6d3a6;display:flex;gap:10px}
.callout .ci{font-size:22px;line-height:1.4}
.tbl{width:100%;border-collapse:separate;border-spacing:0;margin:10px 0;font-family:var(--font-ui);font-size:15px;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff}
.tbl th{background:var(--soft-blue);color:var(--navy);text-align:left;padding:8px 12px;font-weight:800}
.tbl td{padding:8px 12px;border-top:1px solid #e8ecf4}
.tbl td:last-child{font-weight:800;color:var(--accent-dark)}
.kbd{display:inline-block;min-width:28px;padding:0 8px;border-radius:8px;background:var(--navy);color:#fff;font-weight:800;text-align:center;font-size:14px;line-height:24px}

/* 中文大意 / 中文标题 */
.gist{margin:4px 0 14px;padding:8px 12px;border-left:3px solid var(--green);border-radius:10px;background:var(--mint);font-family:var(--font-ui);font-size:14px;line-height:1.7;color:var(--muted);overflow-wrap:anywhere}
.gist-tag{display:inline-block;margin-right:8px;padding:1px 8px;border-radius:999px;background:#fff;color:var(--green-dark);font-size:11px;font-weight:800;vertical-align:1px}
.hide-gloss .gist{display:none}
.title-zh{margin:2px 0 0;font-family:var(--font-ui);font-size:18px;line-height:1.5;font-weight:700;color:var(--muted);overflow-wrap:anywhere}
.lesson-card .title-zh{font-size:14px;margin-top:-2px}

hr.sep{border:0;height:10px;margin:22px 0;background:repeating-linear-gradient(90deg,var(--green) 0 10px,#6cb8ab 10px 20px);border-radius:3px;opacity:.6}

/* words in text */
.w{cursor:pointer;border-radius:5px;transition:background .15s}
.w:hover{background:#e9eef8}
.wc{cursor:pointer;padding:0 4px;margin:0 1px;border-radius:6px;font-weight:700;color:#1f2c46;box-shadow:inset 0 -2px 0 rgba(40,58,99,.12)}
.story .w,.story .wc{padding-block:10px}
.story .tbl .w,.story figcaption .w{padding-block:12px}
.wc .g{font-family:var(--font-ui);font-size:.7em;font-weight:700;color:#8a6a3a;margin-left:2px}
.hide-gloss .wc .g{display:none}
.hl-0{background:var(--soft-green)} .hl-1{background:var(--soft-blue)} .hl-2{background:var(--peach)} .hl-3{background:var(--lilac)} .hl-4{background:var(--butter)}
.s.speaking{background:linear-gradient(transparent 55%,rgba(227,179,65,.45) 55%);border-radius:3px}
.focus{margin-top:22px;padding:12px 14px;border-radius:14px;background:#fff;border:1px dashed #c8d1e0}
.focus b{font-size:12px;letter-spacing:.12em;color:var(--green-dark)}
.focus .chips{flex-wrap:wrap;margin-top:6px}
.focus .chip{border:0;font-family:var(--font-story)}

/* side cards */
.side-card{padding:14px}
.side-card h3{margin:0;font-size:16px;color:var(--navy)}
.side-card .tip{margin:0 0 10px;font-size:12px;color:var(--muted)}
.player-top{display:flex;align-items:center;gap:12px}
.play{width:52px;height:52px;border-radius:50%;background:var(--accent);color:#fff;display:grid;place-items:center;box-shadow:0 8px 16px rgba(192,138,46,.3);flex:none;transition:transform .12s}
.play:active{transform:scale(.93)}
.play svg{width:22px;height:22px}
.player-top .t{flex:1;min-width:0}
.player-top .t b{display:block;font-size:17px;color:var(--navy)}
.player-top .t span{font-size:12px;color:var(--muted)}
.mini{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:7px 12px;border-radius:10px;background:#e9eef4;font-weight:800;font-size:13px;color:var(--navy);white-space:nowrap}
.progress{display:flex;align-items:center;gap:8px;margin:12px 0 4px;font-size:12px;color:var(--muted)}
.progress input{flex:1;accent-color:var(--accent)}
.status{font-size:12px;color:#5e6885;margin:2px 0 8px;min-height:18px}
.ctrl-row{display:flex;align-items:center;gap:8px;margin-top:8px;flex-wrap:wrap}
.ctrl-row label{font-size:13px;font-weight:800;color:var(--navy);width:34px}
.seg{display:flex;gap:6px;flex:1}
.seg button{flex:1;min-height:40px;padding:7px 0;border-radius:10px;border:1px solid var(--line);background:#fff;font-weight:800;font-size:13px;color:var(--navy)}
.seg button.active{background:var(--navy);border-color:var(--navy);color:#fff}
.sent-list{display:flex;flex-direction:column;gap:6px;max-height:300px;overflow:auto;padding-right:2px}
.sent{display:flex;gap:8px;align-items:flex-start;text-align:left;padding:8px 10px;border-radius:12px;background:#f3f5fa;border:1px solid transparent;font-size:14px;line-height:1.45}
.sent i{font-style:normal;font-weight:800;font-size:12px;color:#8b93a8;min-width:20px;padding-top:1px}
.sent.active{background:#fbf2da;border-color:#e6d3a6}
.rec-row{display:flex;gap:8px;margin-top:10px}
.rec-row .btn{flex:1;padding:8px 10px;font-size:13px}
.rec-on{background:var(--accent-soft)!important;color:var(--accent-dark)!important;border-color:#e8d3a8!important;animation:pulse 1s infinite}
@keyframes pulse{50%{opacity:.6}}
.word-row{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:9px 2px;border-top:1px solid #e8ecf4}
.word-row:first-of-type{border-top:0}
.word-row b{font-size:16px;color:var(--navy);font-family:var(--font-story)}
.word-row span{display:block;font-size:12px;color:var(--muted)}
.icon-btn{width:40px;height:40px;border-radius:50%;display:grid;place-items:center;background:#e9eef4;color:var(--navy);flex:none}
.icon-btn svg{width:17px;height:17px}
.icon-btn.saved{background:var(--butter);color:#8a6a3a}

/* mobile docked player */
@media (max-width:979px){
  .player-card{position:fixed;left:8px;right:8px;bottom:8px;z-index:25;box-shadow:0 -6px 30px rgba(34,42,58,.18);border-radius:20px;padding:12px 14px calc(12px + env(safe-area-inset-bottom))}
  .player-card.collapsed .player-more{display:none}
}
@media (min-width:980px){.collapse-btn{display:none}}

/* practice */
.practice{padding:18px;background:linear-gradient(180deg,var(--paper),#fff)}
@media (min-width:700px){.practice{padding:24px 28px}}
.practice h2{margin:0;font-size:22px;color:var(--navy)}
.practice .lead{margin:2px 0 14px;font-size:14px;color:var(--muted)}
.q-card{margin:12px 0;padding:14px;border-radius:16px;background:#fff;border:1px solid #e8ecf4;box-shadow:var(--shadow-sm)}
.q-kicker{font-size:12px;font-weight:800;color:var(--accent);letter-spacing:.02em}
.q-card h4{margin:4px 0 10px;font-size:18px;line-height:1.4;color:var(--navy);font-family:var(--font-story)}
.opts{display:flex;flex-direction:column;gap:8px}
.opt{text-align:left;padding:11px 14px;border-radius:12px;border:1.5px solid var(--line);background:#fafbfd;font-weight:700;font-size:15px;transition:all .15s;position:relative}
.opt:hover{border-color:#c3cde0}
.opt.right{background:var(--soft-green);border-color:var(--green);color:var(--green-dark)}
.opt.wrong{background:var(--accent-soft);border-color:#e2c79a;color:var(--accent-dark);animation:shake .35s}
.opt.cue{border-style:dashed;border-color:var(--green-dark);outline:2px dashed var(--green);outline-offset:2px}
.opt.right:after{content:"✓";position:absolute;right:14px}
.opt.wrong:after{content:"✗";position:absolute;right:14px}
@keyframes shake{25%{transform:translateX(-4px)}75%{transform:translateX(4px)}}
.s.flash{background:var(--butter);border-radius:4px;box-shadow:0 0 0 3px var(--butter);animation:flash-sent 1.1s ease-in-out 3}
@keyframes flash-sent{50%{background:var(--yellow);box-shadow:0 0 0 4px var(--yellow)}}
.feedback{margin-top:8px;font-size:14px;font-weight:700;min-height:0;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.feedback.ok{color:var(--green-dark)} .feedback.no{color:var(--accent-dark)}
.feedback [data-act="back"]{padding:5px 12px;font-size:13px}
.feedback.said{color:var(--navy);font-weight:600}
.opt.open-btn[aria-pressed="true"]{background:var(--soft-blue);border-color:#c6d6ef;color:#3a5f9e}
#openDone{font-size:12px;font-weight:600;opacity:.85;margin-top:2px}
.dad{background:linear-gradient(180deg,#e8eefb,#fff);border-color:#c5d6ef}
.dad .q-kicker{color:#3a5f9e}
.q-frame{font-size:14px;margin:2px 0 6px;font-weight:700}
.q-card textarea,.open-input{width:100%;margin:4px 0 8px;padding:10px 12px;border-radius:12px;border:1.5px solid var(--line);background:var(--card);color:var(--ink);font:inherit;font-size:15px;resize:vertical}
.open-actions{flex-direction:row;flex-wrap:wrap;align-items:center}
.open-actions .open-btn{flex:1;min-width:140px}
.model{margin-top:10px;padding:10px 12px;border-radius:12px;background:var(--soft-green);border:1px solid var(--line);color:var(--navy);font-weight:700;font-size:15px}
.model-zh{margin-top:4px;font-size:13px;color:var(--muted);font-weight:600}
.cloze-list{display:flex;flex-direction:column;gap:8px;margin:8px 0 12px;font-family:var(--font-story);font-size:17px;line-height:1.8}
.cloze-line{display:flex;gap:8px;align-items:baseline}
.cloze-num{font-family:var(--font-ui);font-weight:800;font-size:14px;color:var(--muted);min-width:20px}
.blank{display:inline-flex;align-items:center;justify-content:center;min-width:74px;min-height:36px;padding:2px 10px;margin:0 4px;border-radius:8px;border:1.5px dashed var(--navy);background:var(--paper);font-family:var(--font-story);font-weight:800;font-size:16px;color:var(--navy)}
.blank.ok{background:var(--soft-green);border:1.5px solid var(--green);color:var(--green-dark)}
.blank.bad{background:var(--accent-soft);border:1.5px solid var(--accent);color:var(--accent-dark)}
.blank.empty{background:var(--butter);border:1.5px solid var(--yellow);color:var(--accent-dark)}
.cloze-bank{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}
.bank-w{min-height:42px;padding:6px 14px;border-radius:10px;border:1.5px solid var(--line);background:var(--card);font-family:var(--font-story);font-weight:800;font-size:16px;color:var(--navy)}
.bank-w.used{opacity:.42;cursor:not-allowed;background:var(--bg);text-decoration:line-through}
.cloze-bar{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:10px}
.cloze-msg{font-weight:800;font-size:14px;color:var(--navy)}
.match-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px;margin-top:8px}
.match-col{display:flex;flex-direction:column;gap:8px}
.m-en,.m-zh{min-height:44px;padding:10px 12px;border-radius:12px;border:1.5px solid var(--line);background:var(--paper);font-weight:700;font-size:15px;color:var(--navy);text-align:left;display:flex;align-items:center}
.m-en{font-family:var(--font-story);font-size:16px}
.m-en.sel,.m-zh.sel{background:var(--soft-blue);border-color:var(--blue);outline:2px solid var(--blue)}
.m-en.done,.m-zh.done{background:var(--soft-green);border-color:var(--green);color:var(--green-dark);opacity:.65;cursor:default}
.m-en.bad,.m-zh.bad{background:var(--accent-soft);border-color:var(--accent);color:var(--accent-dark);animation:shake .35s}
.check{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;margin:8px 0;border-radius:12px;background:#fff;border:1px solid #e8ecf4;cursor:pointer;font-family:var(--font-story);font-size:16px}
.check .box{width:22px;height:22px;border-radius:6px;border:2px solid #b2bccd;flex:none;margin-top:3px;display:grid;place-items:center;color:#fff;font-size:14px;font-weight:900}
.check.on .box{background:var(--green);border-color:var(--green)}
.check.on{background:#e6f4f1}
.scratch{position:relative;margin-top:10px;border-radius:16px;overflow:hidden;border:1px solid #c4cbda;background:#fff;min-height:160px}
.scratch .answers{padding:14px 16px;font-size:15px;line-height:1.7}
.scratch .answers h5{margin:6px 0 2px;font-size:13px;color:var(--accent-dark)}
.scratch .answers ol{margin:0;padding-left:20px}
.scratch canvas{position:absolute;inset:0;width:100%;height:100%;touch-action:none;cursor:grab;transition:opacity .5s}
.scratch.revealed canvas{display:none;opacity:0;pointer-events:none}
.scratch:focus-visible{outline:3px solid currentColor;outline-offset:3px}
.scratch.revealed .answers{animation:reveal-pop .25s ease-out}
@keyframes reveal-pop{from{opacity:.15;transform:scale(.97)}to{opacity:1;transform:none}}
.score{display:flex;align-items:center;gap:12px;padding:14px 16px;margin-top:16px;border-radius:16px;background:var(--navy);color:#fff}
.score b{font-size:26px}
.score .btn{margin-left:auto}
.next-card{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;margin-top:18px}
.next-card small{display:block;color:var(--muted);font-size:12px;font-weight:700}
.next-card b{color:var(--navy)}

/* sheet + lightbox */
.backdrop{position:fixed;inset:0;background:rgba(28,36,54,.38);z-index:40;opacity:0;pointer-events:none;transition:opacity .2s}
.backdrop.open{opacity:1;pointer-events:auto}
.sheet{position:fixed;z-index:41;left:50%;bottom:0;width:min(560px,100%);transform:translate(-50%,105%);background:#fff;border-radius:24px 24px 0 0;padding:10px 18px calc(22px + env(safe-area-inset-bottom));box-shadow:0 -10px 40px rgba(0,0,0,.18);transition:transform .28s cubic-bezier(.2,.8,.2,1);max-height:86vh;overflow:auto}
.sheet.open{transform:translate(-50%,0)}
.sheet:not(.open){visibility:hidden;transition:transform .28s,opacity .22s,visibility 0s .3s}
@media (min-width:700px){.sheet{bottom:auto;top:50%;border-radius:24px;transform:translate(-50%,-40%) scale(.96);opacity:0;pointer-events:none;transition:all .22s}.sheet.open{transform:translate(-50%,-50%);opacity:1;pointer-events:auto}}
.grab{width:46px;height:5px;border-radius:9px;background:var(--line);margin:0 auto 10px}
.sheet-top{display:flex;justify-content:space-between;align-items:center;font-size:13px;color:var(--muted);font-weight:700}
.sheet-top a{color:var(--navy);text-decoration:underline;cursor:pointer}
.wc-head{display:flex;align-items:center;gap:10px;margin:8px 0 2px}
.tts-dev{font-size:11px;color:var(--muted);border:1px solid var(--line);border-radius:999px;padding:1px 7px;align-self:center;white-space:nowrap}
.tts-dev[hidden]{display:none}
.wc-word{font-size:34px;font-weight:800;line-height:1.1;font-family:var(--font-story);color:#3a5f9e;flex:1;word-break:break-word}
.wc-word .syl{font-size:inherit;font-weight:inherit;font-family:inherit;line-height:inherit;padding:2px 1px;border-radius:6px;min-height:40px}
.wc-word .syl.on{background:var(--butter);transform:scale(1.06)}
.syl-a{color:#3a5f9e}
.syl-b,.wc-word .syl:nth-child(2n){color:var(--accent-dark)}
.dot{color:var(--muted);margin:0 2px;font-weight:400;user-select:none}
.wc-head .form{font-size:12px;color:var(--muted);background:#f1f4f9;padding:2px 8px;border-radius:999px;font-weight:700}
.ipa{font-family:var(--font-ipa);font-size:18px;color:#46505f}
.ipa .seg{display:inline}
.pos{display:inline-block;margin-top:4px;padding:1px 8px;border-radius:6px;background:var(--bg);color:var(--navy);font-size:12px;font-weight:800}
.zh-mean{margin:10px 0 4px;font-size:20px;font-weight:800;color:var(--ink)}
.zh-mean em,.en-mean em{font-style:normal;color:var(--accent);margin-right:8px;font-size:14px;font-weight:800}
.en-mean{margin:4px 0 8px;font-size:15px;color:#3d4759}
.ctx{margin:8px 0;padding:8px 12px;border-radius:12px;background:var(--soft-green);border:1px solid #c9e6e0;font-size:15px;font-weight:700;color:var(--green-dark);display:flex;gap:8px;align-items:baseline}
.ctx small{font-size:12px;color:var(--navy);font-weight:800}
.chunks{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}
.chunk{padding:6px 12px;min-height:40px;border-radius:10px;background:#f1f4f9;border:1px solid var(--line);font-weight:800;font-size:14px;color:var(--navy);display:inline-flex;align-items:center;gap:6px}
.chunk small{font-weight:600;color:var(--muted);font-size:12px}
details.more{display:block;margin:10px 0;padding:10px 12px;border-radius:12px;background:#f3f5fa;border:1px solid var(--line)}
details.more summary{cursor:pointer;font-weight:800;font-size:13px;color:var(--navy)}
.family{margin-top:8px;display:flex;flex-direction:column;gap:4px;font-size:14px}
.ex-zh{margin-top:2px!important;font-size:14px!important;color:var(--muted)}
.ask-dad{margin:12px 0;padding:12px 14px;border-radius:12px;background:var(--butter);border:1px solid #e6d3a6;font-weight:700;font-size:15px;color:var(--navy)}
.sheet .btn[aria-pressed="true"]{background:var(--navy);border-color:var(--navy);color:#fff}
.ex{margin:10px 0;padding:12px 14px;border-radius:14px;background:#f4f1e8;border:1px solid #e4dcc9}
.ex small{display:block;font-size:12px;color:#857c66;font-weight:800;margin-bottom:2px}
.ex p{margin:0;font-family:var(--font-story);font-size:17px}
.ex mark{background:#f2e6c6;border-radius:4px;padding:0 3px}
.sheet .row{display:flex;gap:8px;flex-wrap:wrap;margin-top:10px}
.sheet .row .btn{flex:1;min-width:120px}
.lookup-input{display:flex;gap:8px;margin:12px 0}
.lookup-input input{flex:1;min-width:0;padding:11px 14px;border-radius:12px;border:1.5px solid var(--line);font:inherit;font-size:16px}
.lightbox{position:fixed;inset:0;z-index:50;background:rgba(25,32,50,.88);display:none;align-items:center;justify-content:center;padding:16px}
.lightbox.open{display:flex}
.lightbox img{max-height:90vh;border-radius:12px;background:#fff}
.lightbox button{position:absolute;top:14px;right:14px;width:40px;height:40px;border-radius:50%;background:#fff;font-size:20px}
.toast{position:fixed;left:50%;top:76px;transform:translate(-50%,-20px);background:var(--navy);color:#fff;padding:8px 16px;border-radius:999px;font-size:14px;font-weight:700;z-index:60;opacity:0;transition:all .25s;pointer-events:none}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* confetti */
.confetti{position:fixed;inset:0;pointer-events:none;z-index:70;overflow:hidden}
.confetti i{position:absolute;width:10px;height:10px;top:-12px;animation:fall 1.6s ease-in forwards}
@keyframes fall{to{transform:translate(var(--dx),105vh) rotate(var(--r));}}

/* vocab */
.flash-wrap{perspective:1000px;margin:10px auto 14px;max-width:460px}
.flash-wrap .flash{position:relative;height:240px;transform-style:preserve-3d;transition:transform .5s;cursor:pointer}
.flash.flipped{transform:rotateY(180deg)}
.flash .face{position:absolute;inset:0;backface-visibility:hidden;border-radius:20px;display:flex;flex-direction:column;align-items:center;justify-content:center;padding:18px;text-align:center;border:1px solid var(--line);box-shadow:var(--shadow)}
.flash .front{background:linear-gradient(180deg,#fff,var(--paper))}
.flash .back{background:linear-gradient(180deg,var(--soft-green),#fff);transform:rotateY(180deg)}
.flash .big{font-size:38px;font-weight:800;color:var(--navy);font-family:var(--font-story)}
.vocab-list{display:grid;grid-template-columns:1fr;gap:10px}
@media (min-width:640px){.vocab-list{grid-template-columns:repeat(2,1fr)}}
.vocab-item{display:flex;align-items:center;gap:10px;padding:12px 14px}
.vocab-item .grow{flex:1;min-width:0}
.vocab-item b{font-size:18px;color:var(--navy);font-family:var(--font-story)}
.vocab-item span{display:block;font-size:13px;color:var(--muted)}
.empty{padding:30px;text-align:center;color:var(--muted)}
.muted{color:var(--muted)}
.badge-review{display:inline-flex;align-items:center;padding:2px 9px;margin-left:6px;border-radius:999px;background:var(--accent-soft);color:var(--accent-dark);font-size:12px;font-weight:800}
.srs-bar{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;padding:16px 18px;margin-bottom:14px}
.srs-today{font-size:18px;font-weight:800;color:var(--navy)}
.srs-bar-right{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.srs-set{font-size:13px;font-weight:700;color:var(--navy);display:inline-flex;align-items:center;gap:6px}
.srs-set select{font:inherit;padding:6px 10px;border-radius:8px;border:1px solid var(--line);background:var(--card);color:var(--navy);font-weight:700}
.btn[disabled]{opacity:.5;cursor:not-allowed;box-shadow:none}
.srs-card{padding:20px;margin:14px 0;background:var(--paper)}
.srs-top{display:flex;justify-content:space-between;align-items:center;font-size:13px;font-weight:700;color:var(--muted);margin-bottom:10px}
.srs-head{display:flex;align-items:center;gap:10px}
.srs-word{font-size:36px;font-weight:800;color:var(--navy);font-family:var(--font-story);line-height:1.15}
.srs-cloze{margin:12px 0;padding:12px 14px;border-radius:12px;background:var(--card);border:1px solid var(--line);font-family:var(--font-story);font-size:18px;color:var(--ink)}
.srs-actions{margin:10px 0}
.srs-actions .btn{min-height:44px}
.srs-back{margin-top:12px;padding-top:12px;border-top:1px dashed var(--line)}
.srs-rates{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:14px}
.rate-btn{flex-direction:column;gap:2px;min-height:52px;padding:10px 8px;border-radius:12px;border:1.5px solid var(--line);background:var(--card);color:var(--navy)}
.rate-btn .when{font-size:12px;font-weight:600;color:var(--muted)}
.rate-forgot{background:var(--accent-soft);color:var(--accent-dark)}
.rate-hard{background:var(--butter);color:var(--navy)}
.rate-ok{background:var(--soft-green);color:var(--green-dark)}
.srs-summary{padding:24px 18px;margin:14px 0;text-align:center}
.srs-summary h3{margin:0 0 8px;font-size:22px;color:var(--navy)}
.sum-counts{margin:4px 0;font-size:17px;font-weight:800;color:var(--ink)}
.sum-note{margin:4px 0;font-size:14px;color:var(--accent-dark);font-weight:700}

@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}.scratch .answers,.scratch canvas{animation:none!important;transition:none!important}}

/* print */
@media print{
  body{background:#fff}
  .topbar,.side,.tabs,.head-actions,.gloss-toggle,.backdrop,.sheet,.next-card,.score,.toast,.zoom-tip,.back{display:none!important}
  .study-layout{display:block;padding:0}
  .article,.practice{border:0;box-shadow:none;padding:0}
  #practice{display:block!important;break-before:page}
  .scratch canvas{display:none}
  .scratch .answers{display:none!important}
  .scratch{min-height:90px;border:2px dashed #8b93a8}
  .scratch::after{content:"答案请在屏幕上查看";display:block;padding:12px;color:var(--muted)}
  .figure{break-inside:avoid}
}
@media (max-width:979px){body.on-practice .player-card{display:none}}
.full-note{font-size:12px;color:var(--muted);margin-left:8px}

/* ---------- 跟读练习 ---------- */
body.sh-open{overflow:hidden}
.sh-entry{width:100%;min-height:48px;margin:4px 0 10px}
#sh-audio{display:none}

.sh-backdrop{position:fixed;inset:0;z-index:50;background:rgba(24,34,54,.45);opacity:0;transition:opacity .18s ease}
.sh-backdrop.open{opacity:1}

.sh-modal{position:fixed;inset:0;z-index:51;display:flex;flex-direction:column;width:100%;height:100vh;height:100dvh;max-height:100vh;max-height:100dvh;overflow:auto;background:#fff;border-radius:0;box-shadow:0 30px 80px rgba(23,33,55,.32);opacity:0;transition:opacity .18s ease,transform .2s ease;-webkit-overflow-scrolling:touch}
.sh-modal.open{opacity:1}
.sh-modal :focus-visible{outline:3px solid rgba(192,138,46,.45);outline-offset:2px}

.sh-head{flex:none;display:flex;align-items:center;justify-content:space-between;gap:12px;background:var(--soft-green);border-bottom:1px solid #d3e9e5;padding:16px 18px}
.sh-head-titles{min-width:0}
.sh-kicker{display:block;font-size:13px;font-weight:700;letter-spacing:.02em;color:var(--muted);line-height:1.4}
#sh-title{margin:2px 0 0;font-size:24px;font-weight:800;line-height:1.2;color:var(--navy)}
.sh-close{flex:none;min-width:96px;min-height:44px;font-size:15px;background:#fff}

.sh-body{flex:1;min-height:0;overflow:auto;padding:16px 18px 22px;-webkit-overflow-scrolling:touch}

.sh-lesson{font-size:14px;font-weight:700;color:var(--muted);line-height:1.4;overflow-wrap:anywhere}
.sh-top{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-top:4px}
.sh-count{font-size:16px;font-weight:800;color:var(--navy)}
.sh-count b{color:var(--accent);font-size:19px}
.sh-auto{min-height:44px;font-size:14px;white-space:nowrap}

.sh-dots{display:flex;flex-wrap:wrap;align-items:center;gap:5px;margin:10px 0}
.sh-dots i{display:block;width:9px;height:9px;border-radius:50%;background:#dfe5f0;transition:background .15s,width .15s,height .15s,box-shadow .15s}
.sh-dots i.rec{background:var(--green)}
.sh-dots i.cur{width:13px;height:13px;background:var(--green-dark);box-shadow:0 0 0 3px rgba(47,156,143,.22)}

.sh-steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:6px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.sh-step{display:flex;align-items:center;justify-content:center;gap:5px;min-height:34px;padding:4px 6px;border-radius:999px;font-size:15px;font-weight:700;color:var(--muted);text-align:center;white-space:nowrap}
.sh-step.active{background:var(--soft-green);color:var(--green-dark)}
.sh-step.done::after{content:"✓";font-size:13px;font-weight:800;line-height:1;color:var(--green)}

.sh-text{font-family:var(--font-story);font-size:clamp(24px,3.2vw,34px);line-height:1.35;color:var(--navy);min-height:2.8em;margin:18px 0 16px;overflow-wrap:anywhere;word-break:break-word}

.sh-actions{display:grid;grid-template-columns:1fr;gap:12px}
@media (min-width:520px){.sh-actions{grid-template-columns:repeat(3,minmax(0,1fr))}}
.sh-act{min-height:60px;min-width:0;padding:10px 8px;font-size:18px;line-height:1.2;border-radius:14px;flex-wrap:wrap;text-align:center}
.sh-act.rec-on{box-shadow:0 6px 16px rgba(154,106,28,.22)}
#sh-listen,#sh-rec,#sh-compare{width:100%}
.sh-modal .btn:disabled{opacity:.45;cursor:not-allowed;transform:none!important;box-shadow:none}

.sh-hint{margin:10px 0 0;min-height:1.4em;text-align:center;font-size:15px;font-weight:700;color:var(--muted)}
.sh-bar{height:8px;margin-top:8px;border-radius:99px;background:#edf1f8;overflow:hidden}
.sh-bar i{display:block;width:100%;height:100%;border-radius:99px;background:var(--accent);transition:width .08s linear}

.sh-mic{margin:14px 0;padding:14px 16px;border-radius:14px;background:#fdf5e3;border:1px solid #eed9a8}
.sh-mic-title{font-size:17px;font-weight:800;line-height:1.35;color:#7d6320}
.sh-mic-body p{margin:8px 0 0;font-size:14px;line-height:1.6;color:#5a5240}
.sh-mic-sub{margin-top:8px;font-size:14px;font-weight:800;color:var(--navy)}
.sh-mic-steps{margin:4px 0 0 1.2em;padding:0;font-size:15px;line-height:1.6;color:var(--ink)}
.sh-mic-steps li{margin:2px 0}
.sh-mic-ios,.sh-mic-sys,.sh-mic-foot{font-size:13px;line-height:1.5;color:var(--muted)}
.sh-mic-ios,.sh-mic-sys{margin:6px 0 0}
.sh-mic-foot{margin:10px 0 0}
.sh-retry{width:100%;min-height:48px;margin-top:10px}
@media (min-width:700px){.sh-mic-cols{display:grid;grid-template-columns:1fr 1fr;gap:4px 18px}}

.sh-nav{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:18px;padding-top:14px;border-top:1px solid var(--line)}
.sh-prev,.sh-next{min-height:48px;min-width:120px;font-size:16px}
.sh-foot{display:flex;flex-direction:column;gap:2px;margin-top:14px;padding-top:10px;border-top:1px dashed var(--line);font-size:12.5px;line-height:1.5;color:var(--muted)}
.sh-kbd-hint{color:#8b93a8}
@media (max-width:899.98px){.sh-kbd-hint{display:none}}
@media (hover:none){.sh-kbd-hint{display:none}}

/* phone: full-screen sheet with safe-area padding */
@media (max-width:699.98px){
  .sh-modal{border-radius:0}
  .sh-head{padding:calc(14px + env(safe-area-inset-top)) calc(16px + env(safe-area-inset-right)) 14px calc(16px + env(safe-area-inset-left))}
  #sh-title{font-size:22px}
  .sh-body{padding:14px calc(16px + env(safe-area-inset-right)) calc(20px + env(safe-area-inset-bottom)) calc(16px + env(safe-area-inset-left))}
  .sh-text{min-height:2.4em;margin:14px 0}
}

/* desktop / tablet: centered card */
@media (min-width:700px){
  .sh-modal{inset:auto;left:50%;top:50%;width:min(760px,calc(100vw - 48px));height:auto;max-height:calc(100vh - 48px);max-height:calc(100dvh - 48px);border-radius:24px;box-shadow:0 30px 80px rgba(23,33,55,.34);transform:translate(-50%,-48%) scale(.985)}
  .sh-modal.open{transform:translate(-50%,-50%) scale(1)}
  .sh-head{padding:18px 24px}
  .sh-body{padding:18px 24px 22px}
  .sh-close{min-width:104px}
}

/* short landscape screens */
@media (max-height:520px){
  .sh-head{padding-top:8px;padding-bottom:8px}
  .sh-body{padding-top:8px;padding-bottom:10px}
  #sh-title{font-size:20px}
  .sh-text{font-size:20px;min-height:1.4em;margin:10px 0}
  .sh-act{min-height:48px;font-size:16px}
  .sh-steps{padding-bottom:6px}
  .sh-nav{margin-top:10px;padding-top:8px}
  .sh-foot{margin-top:8px;padding-top:6px}
}

@media print{
  .sh-modal,.sh-backdrop{display:none!important}
}