/* 浅色主题覆盖层：由 scripts/build-theme-light.js 生成，勿手改；规则变化后重跑生成器 */
html[data-theme="light"]{--bg:hsl(222,21%,92%);--panel:hsl(220,22%,92%);--line:hsl(220,9%,92%);--soft:hsl(223,17%,38%);--text:hsl(213,11%,18%);--purple:hsl(211,100%,51%);--mint:hsl(163,74%,43%);--orange:hsl(42,100%,50%);--red:hsl(10,100%,53%);--acc:var(--purple);--acc-ink:hsl(211,100%,53%);--acc-bg:hsl(211,18%,92%);--acc-line:hsl(216,16%,86%);--acc-tint:hsla(211,100%,50%,0.100);--acc-glow:hsla(211,100%,50%,0.400);--app-glow:hsl(221,22%,92%)}html[data-theme="light"] *{box-sizing:border-box}html[data-theme="light"],html[data-theme="light"] body{margin:0;min-height:100%;background:var(--bg);color:var(--text);font-family:'Noto Sans SC','Space Grotesk',sans-serif}html[data-theme="light"] button,html[data-theme="light"] input{font:inherit}html[data-theme="light"] .app{height:100vh;height:100dvh;display:flex;flex-direction:column;background:radial-gradient(ellipse at 51% 46%,var(--app-glow) 0,var(--bg) 54%);position:relative;overflow:hidden}html[data-theme="light"] .topbar{height:67px;display:flex;align-items:center;gap:17px;padding:0 22px;border-bottom:1px solid var(--line)}html[data-theme="light"] .icon-btn{border:0;background:transparent;color:hsl(222,17%,49%);font-size:19px;cursor:pointer;padding:5px}html[data-theme="light"] .icon-btn:hover{color:hsl(0,0%,17%)}html[data-theme="light"] .brand{display:flex;align-items:center;gap:8px;color:hsl(0,0%,17%);flex:none}html[data-theme="light"] .brand span{color:var(--acc)}html[data-theme="light"] .brand strong{font-size:16px}html[data-theme="light"] .course-title{display:flex;gap:10px;align-items:center;font-size:14px;margin-left:5px;min-width:0}html[data-theme="light"] .course-title strong{color:hsl(212,47%,55%);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}html[data-theme="light"] .course-title span{color:hsl(222,16%,55%);flex:none}html[data-theme="light"] .top-actions{display:flex;gap:12px;margin-left:auto;flex:none}html[data-theme="light"] .progress-track{height:9px;margin:0 18px;border-bottom:1px solid hsl(222,8%,76%);position:relative}html[data-theme="light"] .progress-track:before{content:'';position:absolute;top:3px;left:0;right:0;height:3px;background:hsl(225,8%,92%);border-radius:4px}html[data-theme="light"] .progress-track i{display:block;position:absolute;top:3px;left:0;width:0;height:3px;background:linear-gradient(90deg,hsl(162,29%,86%),var(--mint));border-radius:4px;transition:width .3s}html[data-theme="light"] .workspace{display:flex;flex:1;min-height:0}html[data-theme="light"] .left-rail{width:66px;border-right:1px solid hsl(220,9%,92%);display:flex;flex-direction:column;align-items:center;padding:22px 0 17px;gap:23px}html[data-theme="light"] .rail-item{width:43px;height:44px;border-radius:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:hsl(222,8%,86%);font-size:19px;cursor:pointer}html[data-theme="light"] .rail-item small{font-size:9px;margin-top:3px}html[data-theme="light"] .rail-item.active,html[data-theme="light"] .rail-item:hover{background:var(--acc-bg);color:var(--acc-ink)}html[data-theme="light"] .rail-spacer{flex:1}html[data-theme="light"] .lesson-panel{display:flex;flex:1;flex-direction:column;min-width:0;min-height:0}html[data-theme="light"] .lesson-toolbar{height:84px;padding:0 29px;display:flex;align-items:center;justify-content:space-between}html[data-theme="light"] .lesson-meta{display:flex;gap:17px;align-items:center;color:hsl(222,17%,34%)}html[data-theme="light"] .timer{font-size:14px}html[data-theme="light"] .counter{width:34px;height:34px;border:1px solid hsl(222,8%,79%);border-radius:50%;display:grid;place-items:center;font-size:10px;color:hsl(222,16%,55%)}html[data-theme="light"] .score{font-size:26px;color:var(--orange)}html[data-theme="light"] .difficulty{display:flex;gap:2px;border:1px solid hsl(212,14%,92%);background:hsl(223,21%,92%);padding:5px;border-radius:15px}html[data-theme="light"] .difficulty button{border:0;background:transparent;color:hsl(211,58%,41%);border-radius:9px;padding:8px 10px;cursor:pointer}html[data-theme="light"] .difficulty button.selected{background:hsl(211,27%,92%);color:hsl(211,100%,52%)}html[data-theme="light"] .lesson-content{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;padding-bottom:55px}html[data-theme="light"] .mode-label{font-size:11px;text-transform:uppercase;letter-spacing:1.5px;color:hsl(222,8%,86%);margin-bottom:42px}html[data-theme="light"] .mode-label span{color:hsl(211,83%,47%);padding:0 8px}html[data-theme="light"] .prompt{font-size:28px;font-weight:500;letter-spacing:.7px;text-align:center;margin-bottom:60px;max-width:850px}html[data-theme="light"] .input-shell{width:min(850px,74vw);position:relative}html[data-theme="light"] .input-shell input{width:100%;border:0;outline:0;background:transparent;color:hsl(214,10%,17%);text-align:center;font:500 25px 'Space Grotesk','Noto Sans SC',sans-serif;padding:3px 0 16px}html[data-theme="light"] .input-shell input::placeholder{color:hsl(223,8%,84%)}html[data-theme="light"] .input-line{height:2px;background:repeating-linear-gradient(90deg,hsl(210,90%,49%) 0 16%,hsl(222,17%,34%) 16% 20%,transparent 20% 21%);opacity:.9}html[data-theme="light"] .token-row{display:none;gap:7px;justify-content:center;flex-wrap:wrap;margin:0 0 13px}html[data-theme="light"] .token{padding:6px 9px;background:hsl(211,20%,92%);border:1px solid hsl(211,79%,47%);border-radius:6px;color:hsl(211,100%,55%);font:13px 'Space Grotesk'}html[data-theme="light"] .feedback{height:28px;margin-top:22px;font-size:14px}html[data-theme="light"] .feedback.success{color:var(--mint)}html[data-theme="light"] .feedback.error{color:var(--red)}html[data-theme="light"] .answer-hint{height:22px;color:hsl(211,78%,48%);font-size:13px}html[data-theme="light"] .action-bar{height:111px;display:flex;align-items:center;justify-content:space-between;padding:0 7.5%}html[data-theme="light"] .arrow{border:0;background:none;color:hsl(222,17%,36%);font-size:38px;cursor:pointer}html[data-theme="light"] .arrow:hover{color:hsl(0,0%,17%)}html[data-theme="light"] .actions{display:flex;gap:29px;align-items:center}html[data-theme="light"] .actions button{border:0;background:transparent;color:hsl(222,17%,41%);display:flex;align-items:center;gap:8px;cursor:pointer}html[data-theme="light"] .actions button:hover{color:hsl(211,100%,55%)}html[data-theme="light"] .actions .submit{color:hsl(220,17%,55%)}html[data-theme="light"] .actions span{font-size:14px}html[data-theme="light"] kbd{border:1px solid hsl(223,8%,81%);border-bottom-width:2px;border-radius:5px;background:hsl(223,21%,92%);color:hsl(220,16%,55%);padding:4px 8px;font:13px 'Space Grotesk',sans-serif}html[data-theme="light"] .drawer{position:absolute;z-index:5;left:0;top:0;bottom:0;width:330px;background:hsl(222,21%,92%);border-right:1px solid hsl(221,8%,75%);transform:translateX(-100%);transition:transform .25s ease;padding:24px 20px;box-shadow:12px 0 35px rgba(15,23,42,0.267)}html[data-theme="light"] .drawer.open{transform:translateX(0)}html[data-theme="light"] .drawer-head{display:flex;justify-content:space-between;align-items:center}html[data-theme="light"] .drawer-head button,html[data-theme="light"] .modal-close{border:0;background:none;color:hsl(222,17%,48%);font-size:24px;cursor:pointer}html[data-theme="light"] .drawer-sub{font-size:12px;color:hsl(222,17%,34%);margin:8px 0 23px}html[data-theme="light"] .chapter{display:flex;align-items:center;gap:12px;padding:14px 10px;border-radius:12px;color:hsl(222,16%,48%);margin-bottom:6px}html[data-theme="light"] .chapter.current{background:hsl(211,20%,92%);color:hsl(212,47%,55%)}html[data-theme="light"] .chapter>span{color:hsl(211,22%,37%);font:12px 'Space Grotesk'}html[data-theme="light"] .chapter div{flex:1}html[data-theme="light"] .chapter b,html[data-theme="light"] .chapter small{display:block}html[data-theme="light"] .chapter b{font-size:13px}html[data-theme="light"] .chapter small{font-size:11px;color:hsl(223,17%,34%);margin-top:4px}html[data-theme="light"] .chapter em{font-style:normal;color:hsl(211,100%,52%);font-size:11px}html[data-theme="light"] .drawer-foot{border-top:1px solid hsl(221,9%,92%);margin-top:20px;padding-top:20px}html[data-theme="light"] .drawer-foot button{border:1px dashed hsl(221,8%,83%);background:none;color:hsl(221,17%,47%);width:100%;padding:12px;border-radius:9px;cursor:pointer}html[data-theme="light"] .modal{display:none;position:absolute;z-index:6;inset:0;background:rgba(15,23,42,0.300);align-items:center;justify-content:center}html[data-theme="light"] .modal.open{display:flex}html[data-theme="light"] .modal-card{width:min(520px,90vw);background:hsl(222,20%,92%);border:1px solid hsl(223,8%,77%);border-radius:16px;padding:28px;position:relative;box-shadow:0 20px 60px rgba(15,23,42,0.267)}html[data-theme="light"] .modal-close{position:absolute;right:16px;top:12px}html[data-theme="light"] .modal h2{margin:0 0 18px;font-size:19px}html[data-theme="light"] .modal p{color:hsl(222,17%,44%);font-size:13px;line-height:1.8}html[data-theme="light"] .stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}html[data-theme="light"] .stat-box{background:hsl(225,9%,92%);border-radius:10px;padding:15px}html[data-theme="light"] .stat-box b{font-size:21px;display:block;color:var(--purple)}html[data-theme="light"] .stat-box small{color:hsl(222,17%,41%);font-size:11px}html[data-theme="light"] .review-row{display:flex;gap:10px;align-items:center;padding:13px 0;border-bottom:1px solid hsl(223,8%,92%)}html[data-theme="light"] .review-row span{color:var(--orange)}html[data-theme="light"] .review-row p{margin:0;color:hsl(222,16%,55%);font-size:13px}html[data-theme="light"] .review-row small{display:block;color:hsl(222,16%,35%);margin-top:3px}@media(max-width:800px){html[data-theme="light"] .course-title{display:none}html[data-theme="light"] .left-rail{display:none}html[data-theme="light"] .lesson-toolbar{padding:0 15px}html[data-theme="light"] .prompt{font-size:21px;margin-bottom:45px}html[data-theme="light"] .input-shell{width:84vw}html[data-theme="light"] .input-shell input{font-size:19px}html[data-theme="light"] .action-bar{height:160px;padding:0 12px}html[data-theme="light"] .actions{gap:11px;flex-wrap:wrap;justify-content:center;max-width:300px}html[data-theme="light"] .actions button{gap:4px}html[data-theme="light"] .actions span{font-size:10px}html[data-theme="light"] .actions kbd{font-size:9px;padding:3px}html[data-theme="light"] .difficulty button{padding:7px}html[data-theme="light"] .drawer{width:88vw}}html[data-theme="light"] .token.ok{border-color:hsl(164,54%,36%);background:hsl(169,27%,92%);color:hsl(162,78%,46%)}html[data-theme="light"] .token.bad{border-color:hsl(4,52%,40%);background:hsl(2,19%,92%);color:hsl(9,100%,55%)}html[data-theme="light"] .mode-bar{display:flex;gap:5px;margin-bottom:28px;background:hsl(223,21%,92%);border:1px solid hsl(221,9%,92%);border-radius:10px;padding:4px}html[data-theme="light"] .mode-bar button{border:0;background:transparent;color:hsl(222,17%,37%);border-radius:7px;padding:7px 11px;font-size:11px;cursor:pointer}html[data-theme="light"] .mode-bar button.active{background:hsl(211,23%,92%);color:hsl(211,100%,55%)}html[data-theme="light"] .choice-token{cursor:pointer;white-space:normal;line-height:1.45}html[data-theme="light"] .choice-token:hover{background:hsl(211,23%,92%);color:hsl(211,100%,55%);border-color:hsl(211,100%,51%)}html[data-theme="light"] .icon-btn:disabled,html[data-theme="light"] .actions button:disabled,html[data-theme="light"] .arrow:disabled{opacity:.35;cursor:not-allowed}html[data-theme="light"] .mode-bar button:disabled{opacity:.35}html[data-theme="light"] .choice-token{max-width:420px}html[data-theme="light"] .jump-form{display:flex;gap:10px}html[data-theme="light"] .jump-form input{width:100px;background:hsl(225,9%,92%);border:1px solid hsl(222,8%,79%);border-radius:7px;color:hsl(0,0%,17%);padding:9px}html[data-theme="light"] .jump-form button,html[data-theme="light"] #resumeBtn{border:0;border-radius:8px;background:hsl(211,100%,51%);color:hsl(0,0%,17%);padding:9px 14px;cursor:pointer}html[data-theme="light"] #pauseOverlay{display:none;position:absolute;z-index:8;inset:0;background:rgba(15,23,42,0.400);align-items:center;justify-content:center;text-align:center;backdrop-filter:blur(4px)}html[data-theme="light"] #pauseOverlay.open{display:flex}html[data-theme="light"] #pauseOverlay div{display:flex;flex-direction:column;gap:12px;align-items:center}html[data-theme="light"] #pauseOverlay strong{font-size:27px}html[data-theme="light"] #pauseOverlay span{font-size:13px;color:hsl(223,17%,44%)}html[data-theme="light"] .typing-display{min-height:42px;display:flex;justify-content:center;align-items:flex-end;gap:13px;flex-wrap:wrap;margin-bottom:9px;pointer-events:none}html[data-theme="light"] .typing-word{min-width:62px;height:40px;border-bottom:2px solid hsl(223,17%,38%);display:inline-flex;align-items:flex-end;justify-content:center;padding:0 3px 7px;font:500 23px 'Space Grotesk',sans-serif;letter-spacing:.4px;color:hsl(213,11%,18%)}html[data-theme="light"] .typing-word.current{border-color:hsl(210,100%,51%)}html[data-theme="light"] .typing-word.ok{color:hsl(161,73%,45%);border-color:hsl(163,57%,39%)}html[data-theme="light"] .typing-word.bad{color:hsl(9,100%,53%);border-color:hsl(3,63%,42%)}html[data-theme="light"] .typing-word.empty{color:transparent}html[data-theme="light"] .typing-punctuation{font:500 25px 'Space Grotesk',sans-serif;color:hsl(222,17%,51%);padding-bottom:7px}html[data-theme="light"] .input-shell.typing-mode input{color:transparent;caret-color:hsl(0,0%,17%);position:absolute;inset:0;height:43px;padding:0;z-index:2}html[data-theme="light"] .input-shell.typing-mode .input-line{margin-top:0}html[data-theme="light"] .lesson-content{padding-top:16px}html[data-theme="light"] .prompt{margin-bottom:70px}html[data-theme="light"] .typing-display{gap:9px;width:min(900px,78vw)}html[data-theme="light"] .typing-word{min-width:112px;height:42px;font-size:22px;padding-bottom:10px}html[data-theme="light"] .typing-word.current{border-color:hsl(211,100%,51%)}html[data-theme="light"] .input-line{display:none}html[data-theme="light"] .input-shell{border-bottom:0}html[data-theme="light"] .input-shell.typing-mode input{height:44px}html[data-theme="light"] .rail-item{position:relative}html[data-theme="light"] .rail-badge{position:absolute;top:0;right:1px;min-width:16px;height:16px;border-radius:8px;background:var(--orange);color:hsl(36,34%,92%);font:700 10px/16px "Space Grotesk";font-style:normal;display:none;place-items:center;padding:0 4px}html[data-theme="light"] .rail-badge.show{display:grid}html[data-theme="light"] .lesson-meta .streak{color:var(--orange);font:600 13px 'Space Grotesk','Noto Sans SC',sans-serif;white-space:nowrap}html[data-theme="light"] .lesson-meta .streak.zero{color:hsl(222,8%,82%)}@media(max-width:800px){html[data-theme="light"] .lesson-meta .streak{font-size:11px}}html[data-theme="light"] /* 打字模式：光标跟随当前填空 */
.input-shell.typing-mode input{caret-color:transparent}html[data-theme="light"] .input-shell:focus-within .typing-word.caret-here::after{content:"";width:2px;height:28px;background:var(--purple);margin-left:1px;border-radius:1px;animation:caret-blink 1.1s steps(1) infinite}@keyframes caret-blink{50%{opacity:0}}html[data-theme="light"] .typing-word.partial{border-color:hsl(211,100%,51%);color:var(--text)}html[data-theme="light"] /* 填空区交互：隐藏透明输入层，填空格本身可点可悬停 */
.input-shell.typing-mode input{width:1px;height:1px;left:0;top:0;opacity:0;pointer-events:none}html[data-theme="light"] .input-shell.typing-mode .typing-display{pointer-events:auto}html[data-theme="light"] .typing-word{cursor:text;transition:border-color .12s,background .12s}html[data-theme="light"] .typing-word:hover{border-color:hsl(211,100%,51%);background:hsl(222,21%,92%)}html[data-theme="light"] /* ===== 新增：选择/词块/自定义内容/统计/帮助 ===== */
.choice-token.selected{background:hsl(211,22%,75%);border-color:var(--purple);color:hsl(211,100%,55%);box-shadow:0 0 0 1px var(--purple)}html[data-theme="light"] .choice-token.used{opacity:.35;text-decoration:line-through}html[data-theme="light"] .drawer-foot{display:flex;flex-direction:column;gap:9px}html[data-theme="light"] .modal textarea{width:100%;background:hsl(225,9%,92%);border:1px solid hsl(222,8%,79%);border-radius:8px;color:hsl(213,12%,17%);padding:10px;font:13px/1.6 'Space Grotesk','Noto Sans SC',sans-serif;resize:vertical;margin:10px 0}html[data-theme="light"] #customName{margin:8px 0}html[data-theme="light"] .kb-list{width:100%;border-collapse:collapse;margin-top:10px}html[data-theme="light"] .kb-list td{padding:7px 9px;border-bottom:1px solid hsl(223,8%,92%);font-size:13px;color:hsl(222,17%,52%)}html[data-theme="light"] .heat{display:grid;grid-template-rows:repeat(7,14px);grid-auto-flow:column;gap:4px;margin:14px 0;justify-content:start}html[data-theme="light"] .hm{width:14px;height:14px;border-radius:3px;background:hsl(224,8%,92%)}html[data-theme="light"] .hm.on{background:var(--mint)}html[data-theme="light"] .hm.today{outline:1px solid hsl(0,0%,17%)}html[data-theme="light"] .chips{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:10px}html[data-theme="light"] .word-chip{cursor:pointer}html[data-theme="light"] .focus-ipa{margin-left:10px;font-family:'Gentium Plus','Charis SIL','Doulos SIL',serif;font-weight:400;opacity:.9;letter-spacing:.2px}html[data-theme="light"] .answer-hint .focus-ipa,html[data-theme="light"] .word-chip .chip-ipa{color:hsl(209,100%,55%)}html[data-theme="light"] .word-chip .chip-ipa{font-family:'Gentium Plus','Charis SIL','Doulos SIL',serif;font-size:11px;margin-left:4px;letter-spacing:.2px}html[data-theme="light"] .word-chip i{font-style:normal;color:var(--orange);font-size:10px}html[data-theme="light"] .word-chip:hover{border-color:var(--purple);color:hsl(211,100%,55%)}html[data-theme="light"] /* 已掌握的词：整体压暗 + 绿色勾，与「还没掌握」一眼可分 */
.word-chip.known{opacity:.55}html[data-theme="light"] .word-chip.known:hover{opacity:1}html[data-theme="light"] /* 词级 SRS 到期标记 */
.word-chip .chip-due{font-style:normal;background:var(--orange);color:hsl(0,0%,17%);border-radius:4px;padding:1px 5px;font-size:10px;margin-left:5px}html[data-theme="light"] .word-chip .chip-next{font-style:normal;background:hsla(0,0%,60%,0.120);border-radius:4px;padding:1px 5px;font-size:10px;margin-left:5px;opacity:.75}html[data-theme="light"] /* 1-2 句的「即将上线」章节 */
.p-ch.thin{opacity:.5}html[data-theme="light"] .p-ch .soon{color:var(--orange);font-size:11px}html[data-theme="light"] .p-ch.thin:hover{opacity:.85}html[data-theme="light"] /* 新手引导的档位自评按钮 */
.stage-pick{display:grid;gap:8px;margin:12px 0 4px}html[data-theme="light"] .stage-pick button{text-align:left;background:var(--soft,hsl(220,6%,15%));border:1px solid var(--line,hsl(220,8%,20%));border-radius:10px;padding:10px 12px;cursor:pointer;font:inherit;color:inherit;transition:border-color .15s,background .15s}html[data-theme="light"] .stage-pick button:hover:not(:disabled){border-color:var(--purple);background:hsla(257,72%,35%,0.070)}html[data-theme="light"] .stage-pick button.on{border-color:var(--purple);background:hsla(257,72%,35%,0.130)}html[data-theme="light"] .stage-pick button:disabled{opacity:.6;cursor:default}html[data-theme="light"] .stage-pick button b{display:block;font-size:14.5px;margin-bottom:1px}html[data-theme="light"] .stage-pick button small{display:block;font-size:12px;color:var(--text2,hsl(220,4%,83%));line-height:1.5}html[data-theme="light"] /* ===== 小屏：左导航改为底部标签栏，核心功能不缺失 ===== */
@media(max-width:800px){.left-rail{display:flex;position:fixed;z-index:5;left:0;right:0;bottom:0;width:auto;height:58px;flex-direction:row;align-items:center;justify-content:space-around;padding:0;border-right:0;border-top:1px solid hsl(220,9%,92%);background:hsl(220,21%,92%)}
  .rail-spacer{display:none}
  .rail-item{width:52px}
  .lesson-panel{padding-bottom:58px}}html[data-theme="light"] /* ===== 登录 / 注册 / 忘记密码 ===== */
.auth-screen{position:fixed;inset:0;z-index:20;display:flex;align-items:center;justify-content:center;background:radial-gradient(ellipse at 51% 46%,hsl(221,22%,92%) 0,hsl(222,21%,92%) 60%);padding:20px}html[data-theme="light"] .auth-screen.hidden{display:none}html[data-theme="light"] .auth-card{width:min(380px,94vw);background:hsl(222,21%,92%);border:1px solid hsl(212,8%,76%);border-radius:18px;padding:30px 28px 24px;box-shadow:0 24px 70px rgba(15,23,42,0.333)}html[data-theme="light"] .auth-brand{text-align:center;margin-bottom:20px}html[data-theme="light"] .auth-brand span{color:var(--purple);font-size:26px;display:block}html[data-theme="light"] .auth-brand strong{font-size:20px;display:block;margin-top:6px}html[data-theme="light"] .auth-brand small{color:var(--soft);font-size:12px;display:block;margin-top:6px;line-height:1.6}html[data-theme="light"] .auth-intro{display:grid;grid-template-columns:1fr 1fr;gap:10px 12px;margin:0 0 18px;padding:14px;background:hsl(221,21%,92%);border:1px solid hsl(212,9%,74%);border-radius:12px}html[data-theme="light"] .auth-intro-item{display:flex;gap:8px;align-items:flex-start}html[data-theme="light"] .auth-intro-item em{font-size:16px;font-style:normal;line-height:1.3;flex:none}html[data-theme="light"] .auth-intro-item div{display:flex;flex-direction:column;gap:2px;min-width:0}html[data-theme="light"] .auth-intro-item strong{font-size:13px;color:hsl(211,33%,55%);font-weight:600}html[data-theme="light"] .auth-intro-item span{font-size:11px;color:var(--soft);line-height:1.45}@media (max-width:420px){html[data-theme="light"] .auth-intro{grid-template-columns:1fr}}html[data-theme="light"] .auth-tabs{display:flex;gap:6px;background:hsl(211,22%,92%);border-radius:12px;padding:5px;margin-bottom:18px}html[data-theme="light"] .auth-tabs button{flex:1;border:0;background:transparent;color:hsl(211,17%,45%);border-radius:9px;padding:9px 0;cursor:pointer;font-size:14px}html[data-theme="light"] .auth-tabs button.active{background:hsl(211,20%,74%);color:hsl(211,100%,55%)}html[data-theme="light"] .auth-tabs.hidden{visibility:hidden;height:0;padding:0;margin:0;overflow:hidden}html[data-theme="light"] .auth-form{display:flex;flex-direction:column;gap:11px}html[data-theme="light"] .auth-form.hidden{display:none}html[data-theme="light"] .auth-form input{background:hsl(213,9%,92%);border:1px solid hsl(210,8%,78%);border-radius:10px;color:var(--text);padding:12px 14px;outline:0;font-size:14px}html[data-theme="light"] .auth-form input:focus{border-color:var(--purple)}html[data-theme="light"] .auth-go{border:0;border-radius:10px;background:linear-gradient(90deg,hsl(210,100%,49%),hsl(211,100%,51%));color:hsl(0,0%,17%);padding:12px 0;font-size:15px;cursor:pointer;letter-spacing:6px}html[data-theme="light"] .auth-go:hover{filter:brightness(1.12)}html[data-theme="light"] .auth-go:disabled{opacity:.55;cursor:wait}html[data-theme="light"] .auth-alt{margin:2px 0 0;text-align:center;font-size:12px;color:hsl(222,8%,86%)}html[data-theme="light"] .auth-alt a{color:hsl(211,100%,52%);text-decoration:none}html[data-theme="light"] .auth-q{margin:0;font-size:13px;color:var(--mint);line-height:1.7;text-align:center}html[data-theme="light"] .auth-msg{min-height:22px;margin-top:12px;text-align:center;font-size:13px;color:var(--red)}html[data-theme="light"] .auth-msg.ok{color:var(--mint)}html[data-theme="light"] .acct-form{display:flex;flex-direction:column;gap:8px;margin:14px 0}html[data-theme="light"] .acct-form input{background:hsl(213,9%,92%);border:1px solid hsl(210,8%,78%);border-radius:8px;color:var(--text);padding:10px 12px;outline:0;font-size:13px}html[data-theme="light"] .acct-form input:focus{border-color:var(--purple)}html[data-theme="light"] /* 多维筛选器 */
.filter-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:16px 0}html[data-theme="light"] .filter-grid label{display:flex;flex-direction:column;gap:5px;font-size:12px;color:hsl(222,17%,41%)}html[data-theme="light"] .filter-grid select{background:hsl(225,9%,92%);border:1px solid hsl(222,8%,79%);border-radius:8px;color:var(--text);padding:9px 10px;outline:0;font:inherit;cursor:pointer}html[data-theme="light"] .filter-grid select:focus{border-color:var(--purple)}html[data-theme="light"] .filter-count{font-size:13px;color:hsl(222,17%,44%);margin-bottom:8px}html[data-theme="light"] .filter-count b{color:var(--mint);font-size:16px}html[data-theme="light"] #fsStart:disabled{opacity:.4;cursor:not-allowed}html[data-theme="light"] /* ===== 高度自适应：任何分辨率整页不滚动，只在极端矮屏压缩留白 ===== */
.topbar,html[data-theme="light"] .progress-track,html[data-theme="light"] .lesson-toolbar,html[data-theme="light"] .action-bar{flex-shrink:0}html[data-theme="light"] .lesson-content{min-height:0;overflow-y:auto;scrollbar-width:none;justify-content:safe center}html[data-theme="light"] .lesson-content::-webkit-scrollbar{display:none}html[data-theme="light"] .modal-card{max-height:86vh;max-height:86dvh;overflow-y:auto;-webkit-overflow-scrolling:touch}@media(max-height:860px){html[data-theme="light"] .lesson-content{padding-bottom:24px}html[data-theme="light"] .mode-label{margin-bottom:18px}html[data-theme="light"] .mode-bar{margin-bottom:16px}html[data-theme="light"] .prompt{margin-bottom:26px}}@media(max-height:720px){html[data-theme="light"] .topbar{height:52px}html[data-theme="light"] .lesson-toolbar{height:60px}html[data-theme="light"] .action-bar{height:80px}html[data-theme="light"] .lesson-content{padding-top:6px;padding-bottom:8px}html[data-theme="light"] .mode-label{margin-bottom:8px}html[data-theme="light"] .mode-bar{margin-bottom:8px}html[data-theme="light"] .prompt{font-size:20px;margin-bottom:14px}html[data-theme="light"] .typing-display{min-height:34px;margin-bottom:4px}html[data-theme="light"] .typing-word{height:32px;font-size:18px;min-width:92px;padding-bottom:7px}html[data-theme="light"] .feedback{height:20px;margin-top:8px;font-size:13px}html[data-theme="light"] .answer-hint{height:18px}html[data-theme="light"] .left-rail{padding:10px 0;gap:12px}}@media(max-height:600px){html[data-theme="light"] .topbar{height:46px}html[data-theme="light"] .lesson-toolbar{height:52px}html[data-theme="light"] .action-bar{height:64px}html[data-theme="light"] .mode-label{display:none}html[data-theme="light"] .prompt{font-size:18px;margin-bottom:8px}html[data-theme="light"] .actions{gap:14px}}html[data-theme="light"] /* 更新日志（帮助弹窗底部） */
.log-wrap{margin-top:22px;border-top:1px solid hsl(221,9%,92%);padding-top:4px}html[data-theme="light"] .log-entry{display:flex;gap:12px;padding:8px 0;border-bottom:1px dashed hsl(225,8%,92%)}html[data-theme="light"] .log-entry b{flex-shrink:0;font:12px/1.8 'Space Grotesk';color:var(--purple)}html[data-theme="light"] .log-entry ul{margin:0;padding-left:16px}html[data-theme="light"] .log-entry li{font-size:12px;color:hsl(221,17%,47%);line-height:1.8}html[data-theme="light"] /* 标点不占格：固定贴在格子前后 */
.typing-slot{display:inline-flex;align-items:flex-end}html[data-theme="light"] .typing-body{display:inline-flex;flex-direction:column;align-items:center}html[data-theme="light"] .typing-display{padding-top:17px}html[data-theme="light"] .slot-ipa{font:400 13px 'Gentium Plus','Charis SIL','Doulos SIL',serif;font-style:normal;color:hsl(222,25%,43%);line-height:17px;height:17px;white-space:nowrap;pointer-events:none;letter-spacing:.2px}html[data-theme="light"] .typing-display .typing-punctuation{font:500 20px 'Space Grotesk','Noto Sans SC',sans-serif;color:hsl(223,16%,40%);padding-bottom:10px;user-select:none}@media(max-height:720px){html[data-theme="light"] .typing-display .typing-punctuation{font-size:17px;padding-bottom:6px}}html[data-theme="light"] /* ===== 新手引导 ===== */
.tour-screen{position:fixed;inset:0;z-index:14}html[data-theme="light"] .tour-screen.hidden{display:none}html[data-theme="light"] .tour-screen>i{position:absolute;background:rgba(15,23,42,0.390);pointer-events:auto}html[data-theme="light"] .tour-hole{position:absolute;border:1.5px solid var(--purple);border-radius:12px;box-shadow:0 0 0 2px hsla(211,100%,50%,0.267),0 0 26px hsla(211,100%,50%,0.333);pointer-events:none;transition:left .25s,top .25s,width .25s,height .25s}html[data-theme="light"] .tour-card{position:absolute;width:min(380px,90vw);background:hsl(222,21%,92%);border:1px solid hsl(210,12%,80%);border-radius:14px;padding:20px 22px 16px;box-shadow:0 18px 55px rgba(15,23,42,0.433)}html[data-theme="light"] .tour-card h3{margin:0 0 10px;font-size:16px;color:hsl(211,100%,55%)}html[data-theme="light"] .tour-card p{margin:0;font-size:13px;line-height:1.9;color:hsl(222,16%,54%)}html[data-theme="light"] .tour-dots{display:flex;gap:5px;margin:16px 0 2px}html[data-theme="light"] .tour-dots i{width:6px;height:6px;border-radius:50%;background:hsl(222,8%,76%)}html[data-theme="light"] .tour-dots i.on{background:var(--purple)}html[data-theme="light"] .tour-btns{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-top:10px}html[data-theme="light"] .tour-btns small{color:hsl(222,8%,86%);font-size:11px}html[data-theme="light"] .tour-btns button{border:0;border-radius:8px;padding:8px 14px;cursor:pointer;font-size:13px}html[data-theme="light"] .tour-skip{background:none;color:hsl(222,17%,41%);padding-left:0}html[data-theme="light"] .tour-skip:hover{color:hsl(221,16%,55%)}html[data-theme="light"] .tour-nav{display:flex;gap:8px}html[data-theme="light"] .tour-prev{background:hsl(210,11%,92%);color:hsl(212,18%,55%)}html[data-theme="light"] .tour-next{background:linear-gradient(90deg,hsl(210,100%,49%),hsl(211,100%,51%));color:hsl(0,0%,17%)}html[data-theme="light"] .tour-next:hover,html[data-theme="light"] .tour-prev:hover{filter:brightness(1.12)}html[data-theme="light"] /* ===== P0-P3：快捷开关 / 偏好页 / toast / 引导气泡 ===== */
.toolbar-right{display:flex;gap:12px;align-items:center}html[data-theme="light"] .quick-toggles{display:flex;gap:2px;border:1px solid hsl(212,14%,92%);background:hsl(223,21%,92%);padding:5px;border-radius:15px}html[data-theme="light"] .quick-toggles button{border:0;background:transparent;color:hsl(211,58%,41%);border-radius:9px;padding:8px 10px;cursor:pointer;font-size:12px;white-space:nowrap}html[data-theme="light"] .quick-toggles button:hover{color:hsl(211,100%,52%)}html[data-theme="light"] .quick-toggles button.on{background:hsl(211,27%,92%);color:hsl(163,74%,43%)}html[data-theme="light"] .difficulty button{padding:8px 10px}html[data-theme="light"] .pref-row{display:flex;gap:14px;align-items:center;padding:12px 0;border-bottom:1px solid hsl(223,8%,92%)}html[data-theme="light"] .pref-txt{flex:1}html[data-theme="light"] .pref-txt b{display:block;font-size:14px;color:hsl(210,10%,19%)}html[data-theme="light"] .pref-txt small{display:block;color:hsl(222,17%,40%);font-size:12px;line-height:1.7;margin-top:2px}html[data-theme="light"] .pref-h{margin:20px 0 2px;font-size:12px;letter-spacing:2px;color:hsl(211,83%,47%);text-transform:uppercase}html[data-theme="light"] .pref-note{margin-bottom:4px}html[data-theme="light"] .switch{position:relative;display:inline-block;flex:none;width:44px;height:24px;cursor:pointer}html[data-theme="light"] .switch input{position:absolute;opacity:0;width:0;height:0}html[data-theme="light"] .switch i{position:absolute;inset:0;background:hsl(221,8%,75%);border-radius:99px;transition:background .2s}html[data-theme="light"] .switch i:after{content:"";position:absolute;left:3px;top:3px;width:18px;height:18px;border-radius:50%;background:hsl(221,16%,55%);transition:transform .2s,background .2s}html[data-theme="light"] .switch input:checked+i{background:hsl(210,100%,47%)}html[data-theme="light"] .switch input:checked+i:after{transform:translateX(20px);background:hsl(0,0%,17%)}html[data-theme="light"] .theme-seg{display:inline-flex;flex:none;background:hsl(220,17%,92%);border:1px solid hsl(218,12%,74%);border-radius:9px;overflow:hidden}html[data-theme="light"] .theme-seg button{appearance:none;border:0;background:transparent;color:hsl(222,17%,40%);font:inherit;font-size:12px;padding:7px 12px;cursor:pointer;border-left:1px solid hsl(218,12%,74%)}html[data-theme="light"] .theme-seg button:first-child{border-left:0}html[data-theme="light"] .theme-seg button:hover{color:hsl(211,100%,55%)}html[data-theme="light"] .theme-seg button.on{background:hsl(211,23%,92%);color:hsl(211,100%,55%);font-weight:600}html[data-theme="light"] #toast{position:fixed;top:78px;left:50%;transform:translate(-50%,-12px);z-index:40;max-width:min(520px,86vw);background:hsl(210,14%,92%);border:1px solid hsl(211,14%,82%);color:hsl(211,61%,55%);font-size:13px;line-height:1.7;padding:11px 18px;border-radius:12px;box-shadow:0 12px 34px rgba(15,23,42,0.333);opacity:0;pointer-events:none;transition:opacity .3s,transform .3s}html[data-theme="light"] #toast.show{opacity:1;transform:translate(-50%,0)}html[data-theme="light"] #toast.ok{border-color:hsl(163,23%,81%);color:hsl(160,80%,54%)}html[data-theme="light"] /* 全站学习动态角标（左下角） */
#pulseFeed{position:fixed;left:14px;bottom:110px;z-index:35;display:flex;flex-direction:column;gap:8px;pointer-events:none;max-width:min(340px,76vw)}html[data-theme="light"] .pulse-card{display:flex;align-items:center;gap:8px;background:hsla(210,26%,11%,0.851);-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);border:1px solid hsl(212,15%,78%);border-radius:11px;padding:7px 12px;font-size:12px;line-height:1.5;color:hsl(211,60%,55%);box-shadow:0 10px 26px rgba(15,23,42,0.200);animation:pulseIn .5s ease both;transition:opacity .6s,transform .6s}html[data-theme="light"] .pulse-card i{font-style:normal}html[data-theme="light"] .pulse-card em{font-style:normal;color:hsl(210,24%,42%);font-size:11px;margin-left:auto;white-space:nowrap}html[data-theme="light"] .pulse-card .pc-off{pointer-events:auto;flex:none;background:none;border:1px solid hsl(212,15%,78%);border-radius:7px;color:hsl(210,24%,42%);font-size:10px;line-height:1;padding:3px 6px;cursor:pointer;white-space:nowrap}html[data-theme="light"] .pulse-card .pc-off:hover{color:hsl(211,60%,55%);border-color:hsl(211,24%,33%)}html[data-theme="light"] .pulse-card .pc-x{pointer-events:auto;flex:none;background:none;border:0;color:hsl(212,19%,33%);font-size:11px;line-height:1;padding:3px 4px;cursor:pointer}html[data-theme="light"] .pulse-card .pc-x:hover{color:hsl(0,0%,17%)}html[data-theme="light"] .pulse-card.out{opacity:0;transform:translateY(8px)}@keyframes pulseIn{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}@media (max-width:640px){html[data-theme="light"] #pulseFeed{left:10px;bottom:168px}}html[data-theme="light"] .hint-bubble{position:absolute;left:50%;transform:translateX(-50%);bottom:calc(100% + 12px);background:hsl(210,18%,92%);border:1px solid hsl(210,41%,34%);color:hsl(211,100%,55%);font-size:12px;line-height:1.6;padding:7px 13px;border-radius:11px;white-space:nowrap;z-index:4;pointer-events:none;animation:bubble-in .5s ease}html[data-theme="light"] .hint-bubble:after{content:"";position:absolute;left:50%;top:100%;transform:translateX(-50%);border:6px solid transparent;border-top-color:hsl(210,41%,34%)}html[data-theme="light"] .bubble-sound{bottom:auto;top:auto;left:auto;transform:none;right:-6px;top:calc(100% + 10px);white-space:normal;width:150px}html[data-theme="light"] .bubble-sound:after{left:auto;right:22px;top:0;border-top-color:transparent;border-bottom-color:hsl(210,41%,34%)}html[data-theme="light"] .actions button{position:relative}@keyframes bubble-in{from{opacity:0;translate:0 6px}to{opacity:1;translate:0 0}}@media(max-width:800px){html[data-theme="light"] .toolbar-right{flex-direction:column;gap:6px;align-items:flex-end}html[data-theme="light"] .quick-toggles button{padding:7px 8px;font-size:11px}html[data-theme="light"] .hint-bubble{white-space:normal;width:200px}}html[data-theme="light"] .path-course{cursor:pointer;transition:background .15s}html[data-theme="light"] .path-course:hover{background:hsl(212,12%,92%)}html[data-theme="light"] .path-course.current{background:hsl(211,27%,92%);box-shadow:inset 0 0 0 1px hsla(210,100%,47%,0.400);cursor:default}html[data-theme="light"] .path-course.current:hover{background:hsl(211,27%,92%)}html[data-theme="light"] /* 课程/训练卡进度条 */
.path-bar{display:block;height:4px;background:hsl(218,12%,92%);border-radius:2px;margin-top:7px;overflow:hidden}html[data-theme="light"] .path-bar i{display:block;height:100%;background:linear-gradient(90deg,hsl(210,100%,49%),hsl(211,100%,51%));border-radius:2px;transition:width .3s}html[data-theme="light"] .path-bar.big{height:8px;border-radius:4px;margin:2px 0 12px}html[data-theme="light"] /* 排行榜「距上一名」差分行 */
.lb-gap{color:var(--orange)!important}html[data-theme="light"] /* 生词本「移出」按钮 + 练习页生词按钮高亮态 */
.review-del:hover{border-color:hsl(0,31%,37%)!important;color:hsl(0,100%,55%)!important}html[data-theme="light"] .actions button.on{color:hsl(163,74%,43%)}html[data-theme="light"] /* ===== 提示文字显示优化：不截断、不遮挡、更醒目 ===== */
.feedback{height:auto;min-height:28px;line-height:1.5;text-align:center;padding:0 16px}html[data-theme="light"] .answer-hint{height:auto;min-height:22px;line-height:1.5;text-align:center;padding:0 16px;color:hsl(211,81%,55%);font-weight:500}html[data-theme="light"] .counter{width:auto;min-width:34px;padding:0 9px;border-radius:999px;font-size:11px}html[data-theme="light"] .hint-bubble.bubble-input{bottom:auto;top:calc(100% + 10px)}html[data-theme="light"] .hint-bubble.bubble-input:after{top:auto;bottom:100%;border-top-color:transparent;border-bottom-color:hsl(210,41%,34%)}html[data-theme="light"] .hint-bubble.bubble-sound{bottom:calc(100% + 10px);top:auto}html[data-theme="light"] .hint-bubble.bubble-sound:after{top:100%;bottom:auto;border-top-color:hsl(210,41%,34%);border-bottom-color:transparent}@media(max-width:800px){html[data-theme="light"] .lesson-toolbar{height:auto;min-height:52px;padding-top:4px;padding-bottom:6px}}html[data-theme="light"] .rail-item small{font-size:11px;margin-top:4px;font-weight:500}html[data-theme="light"] /* rail 项为真按钮：清默认样式；当前项在桌面端也要有可见高亮（此前只写在触屏媒体查询里） */
.rail-item{border:0;background:none;padding:0;font-family:inherit}html[data-theme="light"] .rail-item.active{background:var(--acc-bg);color:var(--acc-ink)}html[data-theme="light"] .actions button{color:hsl(221,17%,53%)}html[data-theme="light"] .actions button:hover{color:hsl(211,100%,55%)}html[data-theme="light"] .quick-toggles button{font-size:12px}html[data-theme="light"] .difficulty button{font-size:13px}html[data-theme="light"] .review-row small{font-size:12px;color:hsl(223,16%,41%)}html[data-theme="light"] .score-label{font-size:11px;color:hsl(223,17%,41%);margin-left:-11px;align-self:flex-end;padding-bottom:6px}@media(max-width:800px){html[data-theme="light"] .actions kbd{display:none}html[data-theme="light"] .actions span{font-size:12px}html[data-theme="light"] .action-bar{height:auto;min-height:64px;padding:8px 12px}}@media(max-height:720px){html[data-theme="light"] .action-bar{height:auto;min-height:80px}}@media(max-height:600px){html[data-theme="light"] .action-bar{height:auto;min-height:64px}}html[data-theme="light"] /* ===== 按钮系统 v2：统一交互反馈 ===== */
button{transition:background .15s,color .15s,border-color .15s,box-shadow .15s,filter .15s,transform .06s}html[data-theme="light"] button:active:not(:disabled){transform:translateY(1px)}html[data-theme="light"] button:disabled{opacity:.4;cursor:not-allowed}html[data-theme="light"] button:focus-visible,html[data-theme="light"] input:focus-visible,html[data-theme="light"] select:focus-visible,html[data-theme="light"] a:focus-visible{outline:2px solid hsl(211,100%,54%);outline-offset:2px;border-radius:6px}html[data-theme="light"] /* 主按钮：渐变实心，全站唯一视觉语言 */
button.submit,html[data-theme="light"] .jump-form button,html[data-theme="light"] #resumeBtn{border:0;border-radius:10px;background:linear-gradient(90deg,hsl(210,100%,49%),hsl(211,100%,51%));color:hsl(0,0%,17%);padding:10px 16px;font-size:13px;cursor:pointer;box-shadow:0 4px 14px hsla(210,100%,46%,0.200);letter-spacing:1px}html[data-theme="light"] button.submit:hover,html[data-theme="light"] #jumpGo:hover,html[data-theme="light"] #resumeBtn:hover{filter:brightness(1.15);box-shadow:0 6px 18px hsla(210,100%,46%,0.302)}html[data-theme="light"] .actions .submit{padding:11px 26px;font-size:14px;border-radius:12px;color:hsl(0,0%,17%);box-shadow:0 6px 20px hsla(210,100%,46%,0.302)}html[data-theme="light"] .actions .submit:hover{color:hsl(0,0%,17%)}html[data-theme="light"] /* 弹窗/列表里的次按钮：统一深灰 pill（原来是浏览器默认样式） */
.review-row button:not(.submit),html[data-theme="light"] .acct-form button,html[data-theme="light"] .drawer-foot button{background:hsl(210,11%,92%);border:1px solid hsl(211,8%,79%);border-radius:9px;color:hsl(212,18%,55%);padding:9px 14px;font-size:13px;cursor:pointer}html[data-theme="light"] .review-row button:not(.submit):hover,html[data-theme="light"] .acct-form button:hover{background:hsl(211,10%,76%);border-color:hsl(210,41%,34%);color:hsl(211,100%,55%)}html[data-theme="light"] .drawer-foot button{border:1px dashed hsl(221,8%,83%);background:none;color:hsl(221,17%,47%);width:100%;padding:12px;border-radius:9px}html[data-theme="light"] .drawer-foot button:hover{border-color:hsl(210,100%,49%);color:hsl(211,100%,55%);background:hsl(211,18%,92%)}html[data-theme="light"] /* 图标按钮：固定热区 + hover 圆底 */
.icon-btn{width:38px;height:38px;padding:0;border-radius:10px;display:grid;place-items:center}html[data-theme="light"] .icon-btn:hover{background:hsl(210,14%,92%);color:hsl(0,0%,17%)}html[data-theme="light"] .arrow{width:54px;height:54px;border-radius:50%;display:grid;place-items:center;font-size:32px}html[data-theme="light"] .arrow:hover{background:hsl(210,14%,92%);color:hsl(0,0%,17%)}html[data-theme="light"] .drawer-head button,html[data-theme="light"] .modal-close{width:34px;height:34px;padding:0;border-radius:50%;display:grid;place-items:center;font-size:19px;line-height:1;color:hsl(222,17%,48%)}html[data-theme="light"] .drawer-head button:hover,html[data-theme="light"] .modal-close:hover{background:hsl(210,11%,92%);color:hsl(0,0%,17%)}html[data-theme="light"] /* 切换组选中态统一：加描边环，不只靠颜色区分 */
.difficulty button.selected,html[data-theme="light"] .quick-toggles button.on,html[data-theme="light"] .mode-bar button.active,html[data-theme="light"] .auth-tabs button.active{background:hsl(211,20%,74%);color:hsl(211,100%,55%);box-shadow:inset 0 0 0 1px hsla(210,100%,47%,0.400);font-weight:600}html[data-theme="light"] .difficulty button:not(.selected):hover,html[data-theme="light"] .quick-toggles button:not(.on):hover,html[data-theme="light"] .mode-bar button:not(.active):hover{background:hsl(210,14%,92%)}html[data-theme="light"] .choice-token:active:not(.used){transform:translateY(1px)}html[data-theme="light"] /* 小屏触摸目标 ≥40px */
@media(max-width:800px){.icon-btn{width:42px;height:42px;font-size:20px}
  .arrow{width:48px;height:48px}
  .difficulty button,.quick-toggles button{min-height:38px;padding:8px 9px}
  .mode-bar button{min-height:36px;padding:8px 12px;font-size:12px}
  .actions button{min-height:42px}
  .actions .submit{padding:11px 18px}
  .review-row button:not(.submit),.acct-form button{min-height:40px}}html[data-theme="light"] .counter,html[data-theme="light"] .course-title span{cursor:pointer;transition:.15s}html[data-theme="light"] .counter:hover{color:hsl(0,0%,17%);border-color:hsl(210,31%,37%)}html[data-theme="light"] .course-title span:hover{color:hsl(211,64%,55%)}html[data-theme="light"] /* ===== 排行榜 ===== */
.rank-note{margin:0 0 14px;font-size:12px;color:hsl(222,17%,41%);line-height:1.6}html[data-theme="light"] .lb-tabs{display:flex;gap:6px;background:hsl(216,19%,92%);border-radius:12px;padding:5px;margin-bottom:12px}html[data-theme="light"] .lb-tabs button{flex:1;border:0;background:transparent;color:hsl(221,22%,45%);border-radius:9px;padding:9px 0;cursor:pointer;font-size:14px;transition:.15s}html[data-theme="light"] .lb-tabs button.active{background:hsl(211,27%,92%);color:hsl(211,100%,52%);box-shadow:inset 0 0 0 1px hsla(211,100%,50%,0.333);font-weight:600}html[data-theme="light"] .lb-podium{display:flex;align-items:flex-end;justify-content:center;gap:10px;margin:6px 0 18px}html[data-theme="light"] .lb-pod{flex:1;max-width:120px;background:hsl(215,16%,92%);border:1px solid hsl(215,14%,76%);border-radius:12px;padding:14px 8px;text-align:center;display:flex;flex-direction:column;gap:4px}html[data-theme="light"] .lb-pod em{font-style:normal;font-size:26px;line-height:1}html[data-theme="light"] .lb-pod b{font-size:13px;color:hsl(214,41%,55%);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}html[data-theme="light"] .lb-pod span{font-size:12px;color:var(--orange)}html[data-theme="light"] .lb-pod.g1{background:linear-gradient(180deg,hsl(213,16%,74%),hsl(215,16%,92%));border-color:hsl(212,16%,82%);order:2;transform:translateY(-10px);padding-top:20px}html[data-theme="light"] .lb-pod.g2{order:1}html[data-theme="light"] .lb-pod.g3{order:3}html[data-theme="light"] .lb-list{border-top:1px solid hsl(223,8%,92%)}html[data-theme="light"] .lb-row{display:flex;align-items:center;gap:12px;padding:11px 10px;border-bottom:1px solid hsl(221,10%,92%);font-size:14px}html[data-theme="light"] .lb-row:nth-child(odd){background:hsl(220,16%,92%)}html[data-theme="light"] .lb-rank{width:30px;text-align:center;color:hsl(221,22%,45%);font:600 14px 'Space Grotesk',sans-serif;flex:none}html[data-theme="light"] .lb-name{flex:1;color:hsl(218,9%,24%);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}html[data-theme="light"] .lb-metric{color:var(--orange);font:600 14px 'Space Grotesk',sans-serif;flex:none}html[data-theme="light"] .lb-row.me{background:hsl(211,27%,92%);box-shadow:inset 3px 0 0 var(--purple)}html[data-theme="light"] .lb-row.me .lb-name{color:hsl(211,100%,55%);font-weight:600}html[data-theme="light"] .lb-me{margin-top:16px;padding:14px 16px;background:hsl(215,16%,92%);border:1px solid hsl(212,14%,78%);border-radius:12px;display:flex;flex-direction:column;gap:3px}html[data-theme="light"] .lb-me span{font-size:12px;color:hsl(221,22%,45%)}html[data-theme="light"] .lb-me b{font-size:20px;color:var(--purple)}html[data-theme="light"] .lb-me small{font-size:12px;color:hsl(222,17%,41%)}html[data-theme="light"] /* ===== 深空主题 · 发光输入线 ===== */
#skyCanvas{position:absolute;inset:0;width:100%;height:100%;z-index:0;pointer-events:none}html[data-theme="light"] .app>.topbar,html[data-theme="light"] .app>.progress-track,html[data-theme="light"] .app>.workspace{position:relative;z-index:1}html[data-theme="light"] .input-line{height:2px;background:linear-gradient(90deg,transparent 0,hsl(211,31%,86%) 12%,hsl(211,100%,51%) 45%,hsl(210,100%,55%) 50%,hsl(211,100%,51%) 55%,hsl(211,31%,86%) 88%,transparent 100%);box-shadow:0 0 14px hsla(214,61%,37%,0.400),0 0 4px hsla(211,100%,50%,0.333);opacity:1}html[data-theme="light"] .diff-label{font-size:10px;color:hsl(216,18%,35%);align-self:center;padding:0 4px 0 6px;letter-spacing:1px}html[data-theme="light"] .starmap{display:flex;flex-wrap:wrap;gap:8px 12px;padding:16px 6px 8px}html[data-theme="light"] .hm-star{font-style:normal;color:hsl(220,15%,76%);font-size:16px;line-height:1;transition:.2s}html[data-theme="light"] .hm-star.lit{color:hsl(42,100%,50%);text-shadow:0 0 8px hsla(42,100%,49%,0.467)}html[data-theme="light"] .hm-star.today{outline:1px dashed hsl(211,100%,51%);outline-offset:4px;border-radius:50%}html[data-theme="light"] .rail-badge.done{background:hsl(163,74%,43%);color:hsl(155,39%,92%)}html[data-theme="light"] /* ===== 自有 SVG 图标族 ===== */
.ic{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;vertical-align:-3px}html[data-theme="light"] .icon-btn .ic{width:20px;height:20px;vertical-align:middle}html[data-theme="light"] .rail-item .ic{width:20px;height:20px;margin-bottom:3px}html[data-theme="light"] .streak .ic{color:hsl(42,100%,50%);width:15px;height:15px;vertical-align:-2px}html[data-theme="light"] .difficulty .ic{width:13px;height:13px;vertical-align:-2px}html[data-theme="light"] .mode-bar .ic{width:14px;height:14px;vertical-align:-2px}html[data-theme="light"] .quick-toggles .ic{width:14px;height:14px;vertical-align:-2px}html[data-theme="light"] .auth-intro-item em .ic{width:20px;height:20px;color:hsl(211,100%,51%);vertical-align:-3px}html[data-theme="light"] .sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}html[data-theme="light"] /* ===== 移动端适配：软键盘 / 刘海安全区 / 竖屏小屏 / 触屏 ===== */
html{-webkit-text-size-adjust:100%}html[data-theme="light"] button,html[data-theme="light"] a,html[data-theme="light"] .token,html[data-theme="light"] .chapter,html[data-theme="light"] .rail-item,html[data-theme="light"] .icon-btn,html[data-theme="light"] .arrow,html[data-theme="light"] .word-chip{touch-action:manipulation}html[data-theme="light"] /* 页面锁定为可视视口：body 固定不可被 iOS 键盘顶滚动，.app 始终恰好占满可见区 */
html{height:100%;overflow:hidden}html[data-theme="light"] body{position:fixed;inset:0;width:100%;height:var(--app-h,100dvh);overflow:hidden}html[data-theme="light"] .app{height:100%}html[data-theme="light"] /* 键盘弹出时，浮层改在键盘上方的可见区内居中 */
body.kb-open .auth-screen,html[data-theme="light"] body.kb-open .modal{bottom:var(--kb,0px)}html[data-theme="light"] .lesson-content{-webkit-overflow-scrolling:touch}@media(max-width:800px){html[data-theme="light"] .left-rail{height:calc(58px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom)}html[data-theme="light"] .lesson-panel{padding-bottom:calc(58px + env(safe-area-inset-bottom))}html[data-theme="light"] .drawer{bottom:calc(58px + env(safe-area-inset-bottom))}html[data-theme="light"] /* 软键盘弹出：压缩留白，保证填空区完整露在键盘上方 */
  body.kb-open .mode-label{display:none}html[data-theme="light"] body.kb-open .prompt{margin-bottom:10px}html[data-theme="light"] body.kb-open .lesson-content{padding-bottom:0}}html[data-theme="light"] /* 真 hover 设备才有的悬浮态，触屏上改为还原默认色防粘滞 */
@media(hover:none){.icon-btn:hover{background:none;color:hsl(222,17%,49%)}
  .rail-item:hover{background:none;color:hsl(222,8%,86%)}
  .rail-item.active{background:var(--acc-bg);color:var(--acc-ink)}
  .arrow:hover{background:none;color:hsl(222,17%,36%)}
  .actions button:hover{color:hsl(221,17%,53%)}
  .actions .submit:hover{color:hsl(0,0%,17%)}
  .choice-token:hover{background:hsl(211,20%,92%);border-color:hsl(211,79%,47%);color:hsl(211,100%,55%)}
  .choice-token.selected:hover{background:hsl(211,22%,75%);border-color:var(--purple);color:hsl(211,100%,55%)}
  .difficulty button:not(.selected):hover,.quick-toggles button:not(.on):hover,.mode-bar button:not(.active):hover{background:transparent}
  .word-chip:hover{border-color:hsl(211,79%,47%);color:hsl(211,100%,55%)}
  .path-course:hover{background:none}
  .counter:hover{color:hsl(222,16%,55%);border-color:hsl(222,8%,79%)}
  .course-title span:hover{color:hsl(222,16%,55%)}}html[data-theme="light"] /* 竖屏手机主断点 */
@media(max-width:480px){.topbar{padding:0 10px;gap:8px}
  .top-actions{gap:4px}
  #pauseBtn,#redoBtn{display:none}
  .progress-track{margin:0 10px}
  .lesson-toolbar{flex-direction:column;align-items:center;gap:2px;padding:6px 10px}
  .toolbar-right{flex-direction:row;align-items:center;gap:8px;flex-wrap:wrap;justify-content:center}
  .diff-label{display:none}
  .lesson-meta{gap:10px;justify-content:center;flex-wrap:wrap}
  .score{font-size:20px}
  .mode-label{margin-bottom:10px;font-size:10px}
  .prompt{font-size:19px;margin-bottom:16px;max-width:94vw;line-height:1.65}
  .typing-display{width:94vw;gap:6px}
  .input-shell{width:94vw}
  .action-bar{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:2px 6px;padding:4px 8px;min-height:0}
  .action-bar .arrow{grid-row:1;width:44px;height:38px;font-size:26px}
  #prevBtn{grid-column:1}#nextBtn{grid-column:3}
  .actions{grid-column:1/-1;display:grid;grid-template-columns:repeat(4,1fr);gap:4px;max-width:none}
  .actions button{min-height:40px;justify-content:center;padding:0 2px}
  .actions span{font-size:11px}
  .actions .submit{padding:11px 6px;font-size:13px}
  .modal-card{width:96vw;padding:20px 16px;border-radius:14px}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .filter-grid{grid-template-columns:1fr}
  .kb-list td{font-size:11px}
  .tour-card{padding:16px}
  .lb-pod{padding:10px 4px}
  .drawer{width:92vw;padding:20px 14px}
  #chapterList{margin:0 -14px;padding:0 14px 4px}
  .pick-scroll{margin:0 -14px;padding:0 14px 4px}
  .auth-card{padding:22px 18px}
  #toast{top:auto;bottom:calc(70px + env(safe-area-inset-bottom))}}html[data-theme="light"] /* ===== 许愿池：右下角流星入口 + 许愿卡 ===== */
.wish-fab{position:fixed;right:18px;bottom:calc(18px + env(safe-area-inset-bottom));z-index:40;width:44px;height:44px;border-radius:50%;border:1px solid hsl(221,14%,78%);background:radial-gradient(circle at 32% 28%,hsl(222,21%,92%),hsl(224,18%,92%));color:var(--orange);display:grid;place-items:center;cursor:pointer;box-shadow:0 6px 20px rgba(15,23,42,0.333);transition:transform .18s}html[data-theme="light"] .wish-fab .ic{width:22px;height:22px;animation:wishTwinkle 3.2s ease-in-out infinite}html[data-theme="light"] .wish-fab:hover{transform:translateY(-3px);box-shadow:0 10px 26px rgba(15,23,42,0.367),0 0 14px hsla(42,100%,49%,0.180)}html[data-theme="light"] .wish-fab.wished .ic{animation:none;opacity:.45}@keyframes wishTwinkle{0%,100%{opacity:.72;filter:drop-shadow(0 0 1px #ffd16659)}50%{opacity:1;filter:drop-shadow(0 0 7px #ffd166cc)}}@media(prefers-reduced-motion:reduce){html[data-theme="light"] .wish-fab .ic{animation:none}}html[data-theme="light"] .wish-note{margin:-8px 0 14px}html[data-theme="light"] .wish-note b{color:var(--orange)}html[data-theme="light"] .wish-note em{font-style:normal;color:hsl(223,21%,46%)}html[data-theme="light"] #wishText{width:100%;background:hsl(221,23%,92%);border:1px solid hsl(221,11%,77%);border-radius:10px;color:var(--text);padding:12px;font:inherit;font-size:14px;line-height:1.7;resize:vertical;min-height:110px;outline:none}html[data-theme="light"] #wishText:focus{border-color:hsl(218,44%,39%)}html[data-theme="light"] .wish-foot{display:flex;align-items:center;gap:12px;margin-top:12px}html[data-theme="light"] .wish-foot .wish-count{font-size:11px;color:var(--soft);font-family:'Space Grotesk',sans-serif}html[data-theme="light"] .wish-btn{border:0;border-radius:9px;background:linear-gradient(135deg,hsl(211,100%,51%),hsl(163,74%,43%));color:hsl(0,0%,17%);padding:10px 24px;cursor:pointer;font-weight:600}html[data-theme="light"] .wish-btn:disabled{opacity:.5;cursor:not-allowed}html[data-theme="light"] .wish-foot .wish-btn{margin-left:auto}html[data-theme="light"] .wish-msg{color:var(--red);font-size:12px;min-height:16px;margin-top:8px}html[data-theme="light"] .wish-done{text-align:center;padding:8px 2px}html[data-theme="light"] .wish-done .wish-star{width:46px;height:46px;color:var(--orange);filter:drop-shadow(0 0 12px hsla(42,100%,49%,0.549))}html[data-theme="light"] .wish-done h2{margin:12px 0 6px}html[data-theme="light"] /* ===== 顶栏回音舱：三层消息区（氛围态常驻 / 事件回音弹出） ===== */
.topbar{position:relative}html[data-theme="light"] .top-msg{flex:1;min-width:0;display:flex;align-items:center;justify-content:center;gap:7px;text-align:center;font-size:13px;letter-spacing:.3px;white-space:nowrap;overflow:hidden;color:hsl(221,18%,44%);pointer-events:none}html[data-theme="light"] .top-msg .glyph{font-size:14px;flex-shrink:0}html[data-theme="light"] .top-msg .sub{color:hsl(222,15%,34%);font-size:12px;margin-left:2px}html[data-theme="light"] .top-msg.ambient{opacity:.55}html[data-theme="light"] .top-msg.ev{color:hsl(218,26%,55%)}html[data-theme="light"] .top-msg.ev.success{color:var(--mint)}html[data-theme="light"] .top-msg.ev.muted{color:hsl(220,21%,48%)}html[data-theme="light"] .top-msg.ev.error{color:var(--red)}html[data-theme="light"] .top-msg.ev.gold{color:var(--orange);font-size:14px}html[data-theme="light"] .top-msg.pop{animation:topmsg-pop .45s cubic-bezier(.2,1.4,.4,1)}@keyframes topmsg-pop{0%{opacity:0;transform:translateY(-9px)}60%{opacity:1;transform:translateY(1px)}100%{opacity:1;transform:translateY(0)}}html[data-theme="light"] .top-msg.fade{animation:topmsg-fade .6s ease}@keyframes topmsg-fade{from{opacity:1}to{opacity:.55}}@media(max-width:800px){html[data-theme="light"] .top-msg.ambient{display:none}html[data-theme="light"] .top-msg.ev{position:absolute;top:calc(100% + 7px);left:50%;transform:translateX(-50%);max-width:86vw;white-space:normal;background:hsl(220,20%,92%);border:1px solid var(--line);border-radius:20px;padding:6px 16px;box-shadow:0 10px 26px rgba(15,23,42,0.333);z-index:9}html[data-theme="light"] .top-msg.pop{animation:topmsg-pop-m .45s cubic-bezier(.2,1.4,.4,1)}}@keyframes topmsg-pop-m{0%{opacity:0;transform:translate(-50%,-9px)}60%{opacity:1;transform:translate(-50%,1px)}100%{opacity:1;transform:translate(-50%,0)}}html[data-theme="light"] /* ===== 学生体验包：游客试玩 / 一键冲刺 / 星图 / 补星卡 / 好友榜 ===== */
.guest-go{border:0;background:none;color:hsl(211,100%,52%);font-size:13px;cursor:pointer;padding:10px 0 0;letter-spacing:.5px}html[data-theme="light"] .guest-go:hover{color:hsl(211,100%,55%);text-decoration:underline}html[data-theme="light"] .preset-row{display:flex;flex-wrap:wrap;gap:7px;margin:0 0 14px}html[data-theme="light"] .preset-chip{border:1px solid hsl(211,21%,79%);background:hsl(213,26%,92%);color:hsl(211,100%,54%);border-radius:999px;padding:7px 15px;font-size:13px;cursor:pointer}html[data-theme="light"] .preset-chip:hover{border-color:hsl(210,100%,49%);color:hsl(211,100%,55%);background:hsl(213,24%,92%)}html[data-theme="light"] .zone.full>span{color:var(--orange);text-shadow:0 0 8px hsla(42,100%,49%,0.467)}html[data-theme="light"] .rail-badge{pointer-events:none}@media(max-width:480px){html[data-theme="light"] #starmapBtn{display:none}}html[data-theme="light"] .lb-del{border:1px solid hsl(211,8%,79%);background:none;color:hsl(220,16%,44%);border-radius:8px;padding:4px 10px;font-size:11px;cursor:pointer;flex:none}html[data-theme="light"] .lb-del:hover{border-color:hsl(0,31%,37%);color:hsl(0,100%,55%)}html[data-theme="light"] .lb-code{display:block;margin:6px 0 12px;border:1px dashed hsl(210,100%,49%);background:hsl(214,29%,92%);color:hsl(42,100%,50%);font:700 26px/1.3 'Space Grotesk','Noto Sans SC',sans-serif;letter-spacing:10px;text-indent:10px;border-radius:10px;padding:10px 0;cursor:pointer;width:100%}html[data-theme="light"] .lb-code:hover{background:hsl(213,30%,92%)}html[data-theme="light"] .fr-add{display:flex;gap:8px}html[data-theme="light"] .fr-add input{flex:1;background:hsl(213,9%,92%);border:1px solid hsl(210,8%,78%);border-radius:8px;color:var(--text);padding:10px 12px;outline:0;font-size:14px}html[data-theme="light"] .fr-add input:focus{border-color:var(--purple)}html[data-theme="light"] .fr-msg{margin:6px 0 0;font-size:12px;color:var(--red);min-height:16px}html[data-theme="light"] /* ===== 较真度收纳：竖屏手机折叠成小徽章，点开才出四档浮层 ===== */
.difficulty{position:relative}html[data-theme="light"] .diff-pop{display:flex;gap:2px;align-items:center}html[data-theme="light"] .diff-cur{display:none}html[data-theme="light"] #diffMask{display:none}@media(max-width:480px){html[data-theme="light"] .difficulty{padding:3px 4px;border-radius:99px}html[data-theme="light"] .diff-cur{display:inline-flex;align-items:center;gap:5px;border:0;background:transparent;color:hsl(211,100%,55%);font-size:13px;cursor:pointer;padding:6px 10px;min-height:34px;border-radius:99px}html[data-theme="light"] .lesson-toolbar.diff-open .diff-cur{background:hsl(211,20%,74%);color:hsl(211,100%,55%)}html[data-theme="light"] .diff-pop{display:none;position:absolute;right:0;top:calc(100% + 6px);z-index:8;flex-direction:column;gap:4px;background:hsl(221,21%,92%);border:1px solid hsl(210,12%,80%);border-radius:12px;padding:8px;box-shadow:0 14px 40px rgba(15,23,42,0.367)}html[data-theme="light"] .lesson-toolbar.diff-open .diff-pop{display:flex}html[data-theme="light"] .diff-pop button{width:100%;justify-content:flex-start;text-align:left}html[data-theme="light"] #diffMask{position:fixed;inset:0;z-index:7;border:0;background:transparent;padding:0}html[data-theme="light"] .lesson-toolbar.diff-open #diffMask{display:block}}html[data-theme="light"] /* ===== 模式选择收纳：竖屏手机折叠成小徽章，点开才出四档浮层（桌面维持原横排） ===== */
.mode-wrap{position:relative}html[data-theme="light"] .mode-cur{display:none}html[data-theme="light"] #modeMask{display:none}@media(max-width:480px){html[data-theme="light"] .mode-wrap{display:flex;margin-bottom:10px}html[data-theme="light"] .mode-cur{display:inline-flex;align-items:center;gap:5px;border:1px solid hsl(221,9%,92%);background:hsl(223,21%,92%);color:hsl(211,100%,55%);font-size:13px;cursor:pointer;padding:6px 12px;min-height:36px;border-radius:99px}html[data-theme="light"] .mode-wrap.mode-open .mode-cur{background:hsl(211,20%,74%);color:hsl(211,100%,55%)}html[data-theme="light"] .mode-wrap .mode-bar{display:none;margin:0;position:absolute;left:0;top:calc(100% + 6px);z-index:8;flex-direction:column;gap:4px;background:hsl(221,21%,92%);border:1px solid hsl(210,12%,80%);border-radius:12px;padding:8px;box-shadow:0 14px 40px rgba(15,23,42,0.367)}html[data-theme="light"] .mode-wrap.mode-open .mode-bar{display:flex}html[data-theme="light"] .mode-wrap .mode-bar button{width:100%;justify-content:flex-start;text-align:left}html[data-theme="light"] #modeMask{position:fixed;inset:0;z-index:7;border:0;background:transparent;padding:0}html[data-theme="light"] .mode-wrap.mode-open #modeMask{display:block}}html[data-theme="light"] /* ===== 弹窗动效与精修：背景淡入 + 卡片浮起，关闭统一 180ms 淡出（script.js 拦截器触发） ===== */
.modal.open{animation:modal-fade .22s ease}html[data-theme="light"] .modal.open .modal-card{animation:modal-card-in .28s cubic-bezier(.2,.9,.35,1.18)}html[data-theme="light"] .modal.closing{display:flex;animation:modal-out .18s ease forwards}html[data-theme="light"] .modal.closing .modal-card{animation:modal-card-out .18s ease forwards}@keyframes modal-fade{from{opacity:0}to{opacity:1}}@keyframes modal-out{to{opacity:0}}@keyframes modal-card-in{from{opacity:0;transform:translateY(16px) scale(.97)}to{opacity:1;transform:none}}@keyframes modal-card-out{to{opacity:0;transform:translateY(8px) scale(.98)}}html[data-theme="light"] #pauseOverlay.open{animation:modal-fade .22s ease}html[data-theme="light"] /* 卡片质感：渐变底、顶部星轨发丝线、细滚动条 */
.modal-card{background:linear-gradient(180deg,hsl(220,21%,92%),hsl(221,20%,92%));border-color:hsl(218,13%,76%);box-shadow:0 24px 70px rgba(15,23,42,0.367),0 0 0 1px hsla(211,100%,50%,0.078),0 0 44px hsla(211,100%,50%,0.059);scrollbar-width:thin;scrollbar-color:hsl(215,14%,78%) transparent}html[data-theme="light"] .modal-card:before{content:'';position:absolute;top:0;left:18%;right:18%;height:1px;background:linear-gradient(90deg,transparent,hsla(211,100%,50%,0.502),transparent)}html[data-theme="light"] .modal-card::-webkit-scrollbar{width:6px}html[data-theme="light"] .modal-card::-webkit-scrollbar-thumb{background:hsl(215,14%,78%);border-radius:3px}html[data-theme="light"] /* 弹窗/抽屉内列表错峰入场（星区/打卡星/课程路径/章节），delay 由 stagger() 写入 */
.modal.open .zone,html[data-theme="light"] .modal.open .path-course,html[data-theme="light"] .drawer.open .chapter{animation:row-in .34s ease both}html[data-theme="light"] .modal.open .hm-star.lit{animation:star-pop .38s ease both}@keyframes row-in{from{opacity:0;transform:translateX(-10px)}to{opacity:1;transform:none}}@keyframes star-pop{from{opacity:0;transform:scale(.2)}70%{transform:scale(1.25)}to{opacity:1;transform:scale(1)}}html[data-theme="light"] /* 星区全亮：金星缓慢呼吸微光 */
.zone.full>span{animation:zone-breathe 2.8s ease-in-out infinite}@keyframes zone-breathe{0%,100%{text-shadow:0 0 6px #ffd16666}50%{text-shadow:0 0 16px #ffd166e0}}html[data-theme="light"] /* 左栏微动效：悬浮上浮 + 图标柔光；角标弹跳出现 */
.rail-item{transition:transform .18s,background .15s,color .15s}html[data-theme="light"] .rail-item .ic{transition:filter .18s}@media(hover:hover){html[data-theme="light"] .rail-item:hover{transform:translateY(-2px)}html[data-theme="light"] .rail-item:hover .ic,html[data-theme="light"] .rail-item.active .ic{filter:drop-shadow(0 0 6px var(--acc-glow))}}html[data-theme="light"] .rail-badge.show{animation:badge-pop .4s cubic-bezier(.2,1.6,.4,1)}@keyframes badge-pop{from{transform:scale(0)}60%{transform:scale(1.3)}to{transform:scale(1)}}html[data-theme="light"] /* 练黑星按钮悬浮辉光 */
.zone-go:hover{box-shadow:0 0 12px hsla(210,100%,47%,0.251)}html[data-theme="light"] /* 用户系统开启「减弱动态效果」时全部停用 */
@media(prefers-reduced-motion:reduce){.modal.open,.modal.open .modal-card,.modal.closing,.modal.closing .modal-card,#pauseoverlay.open,.modal.open .zone,.modal.open .path-course,.drawer.open .chapter,.modal.open .hm-star.lit,.zone.full>span,.rail-badge.show{animation:none!important}}html[data-theme="light"] /* ===== 许愿池首访提示：流星小纸条（只出现一次）===== */
.wish-hint{position:fixed;right:14px;bottom:calc(74px + env(safe-area-inset-bottom));z-index:39;width:232px;background:hsl(222,20%,92%);border:1px solid hsl(224,12%,79%);border-radius:14px 14px 3px 14px;padding:12px 32px 12px 14px;box-shadow:0 10px 30px rgba(15,23,42,0.367);animation:wishPop .5s cubic-bezier(.34,1.56,.64,1) both}html[data-theme="light"] .wish-hint.hidden{display:none}html[data-theme="light"] .wish-hint:after{content:'';position:absolute;right:20px;bottom:-5.5px;width:10px;height:10px;background:hsl(222,20%,92%);border-right:1px solid hsl(224,12%,79%);border-bottom:1px solid hsl(224,12%,79%);transform:rotate(45deg)}html[data-theme="light"] .wish-hint b{display:block;color:var(--orange);font-size:13px;letter-spacing:.5px;margin-bottom:4px}html[data-theme="light"] .wish-hint span{font-size:12px;color:hsl(222,21%,53%);line-height:1.75}html[data-theme="light"] .wish-hint span em{font-style:normal;color:var(--purple)}html[data-theme="light"] .wish-hint-close{position:absolute;right:5px;top:5px;border:0;background:none;color:hsl(222,8%,86%);font-size:16px;cursor:pointer;padding:2px 5px;line-height:1}html[data-theme="light"] .wish-hint-close:hover{color:hsl(0,0%,17%)}@keyframes wishPop{from{opacity:0;transform:translateY(14px) scale(.55)}to{opacity:1;transform:translateY(0) scale(1)}}html[data-theme="light"] .wish-hint-inner-float{animation:wishFloat 3.4s ease-in-out 1s infinite}html[data-theme="light"] .wish-fab.attn{animation:wishHop 1.4s ease-in-out infinite}html[data-theme="light"] .wish-fab.attn .ic{animation:wishExcite 1s ease-in-out infinite}@keyframes wishFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-5px)}}@keyframes wishHop{0%,100%{transform:translateY(0)}18%{transform:translateY(-6px)}36%{transform:translateY(0)}}@keyframes wishExcite{0%,100%{transform:scale(1) rotate(0deg);filter:drop-shadow(0 0 2px #ffd16680)}50%{transform:scale(1.18) rotate(-8deg);filter:drop-shadow(0 0 10px #ffd166)}}@media(prefers-reduced-motion:reduce){html[data-theme="light"] .wish-hint,html[data-theme="light"] .wish-hint-inner-float,html[data-theme="light"] .wish-fab.attn,html[data-theme="light"] .wish-fab.attn .ic{animation:none}}html[data-theme="light"] /* ===== 一次性提示的「不再提示」操作行 ===== */
.wish-hint-act{display:flex;justify-content:flex-end;margin-top:7px}html[data-theme="light"] .wish-hint-act button{border:0;background:none;color:hsl(222,8%,86%);font-size:11px;cursor:pointer;padding:2px 5px}html[data-theme="light"] .wish-hint-act button:hover{color:hsl(222,21%,53%)}html[data-theme="light"] .hint-bubble{cursor:pointer;pointer-events:auto}html[data-theme="light"] /* ===== 双舱互跳入口（抽屉底部，颜色随本舱点缀色） ===== */
.cabin-entry{display:block;margin-top:12px;text-align:center;color:var(--acc);font-size:13px;text-decoration:none;border:1px dashed var(--acc-line);border-radius:10px;padding:9px 10px}html[data-theme="light"] .cabin-entry:hover{border-color:var(--acc);color:hsl(0,0%,17%)}html[data-theme="light"] .drawer-dict{margin-top:0;padding:8px 12px;font-size:13px;border-radius:8px}html[data-theme="light"] /* ===== 双舱切换导航：听音拼句舱 ⇄ 单词听写舱 ===== */
.cabin-nav{display:flex;gap:6px;align-items:center;flex:none}html[data-theme="light"] .cabin-tab{border:1px solid var(--line);border-radius:999px;padding:5px 12px;font-size:12px;color:hsl(222,17%,44%);text-decoration:none;white-space:nowrap;transition:.15s}html[data-theme="light"] .cabin-tab:hover{color:var(--text);border-color:var(--acc-line)}html[data-theme="light"] .cabin-tab.on{color:var(--text);border-color:var(--acc-line);background:var(--acc-tint)}@media(max-width:800px){html[data-theme="light"] .cabin-tab{padding:4px 9px;font-size:11px}html[data-theme="light"] .cabin-tab.on{display:none}}html[data-theme="light"] /* ===== 看打模式：未敲字母的灰色「影字」 ===== */
.typing-word .ghost{font-style:normal;color:hsl(221,10%,83%);user-select:none;pointer-events:none}html[data-theme="light"] /* 看打的光标必须落在「已敲文字与影字之间」：屏蔽通用 ::after 词尾光标，改用内联 .kcaret */
.typing-display.copy .typing-word.caret-here::after{content:none}html[data-theme="light"] .typing-word .kcaret{display:inline-block;width:2px;height:28px;background:var(--purple);border-radius:1px;margin-left:1px;vertical-align:-4px;animation:caret-blink 1.1s steps(1) infinite}html[data-theme="light"] /* ===== 键盘指法指引（仅电脑端显示） ===== */
#kbGuide{width:min(620px,72vw);margin:2px auto 0;display:flex;flex-direction:column;gap:6px;user-select:none}html[data-theme="light"] .kb-head{display:flex;align-items:center;gap:12px;font-size:11px;color:hsl(222,8%,86%)}html[data-theme="light"] .kb-title{letter-spacing:1px;flex:none}html[data-theme="light"] #kbFingerTip{flex:1;text-align:center;font-size:13px;font-weight:500;color:hsl(219,26%,53%)}html[data-theme="light"] #kbFingerTip b{color:var(--orange);font-size:15px;font-family:'Space Grotesk',sans-serif}html[data-theme="light"] #kbHide{border:1px solid hsl(221,10%,75%);background:transparent;color:hsl(222,8%,86%);border-radius:6px;font-size:11px;padding:2px 8px;cursor:pointer;flex:none}html[data-theme="light"] #kbHide:hover{color:hsl(219,26%,53%);border-color:hsl(220,12%,80%)}html[data-theme="light"] .kb-row{display:flex;gap:5px;justify-content:center}html[data-theme="light"] .kb-key{width:36px;height:30px;border-radius:6px;display:grid;place-items:center;font:600 13px 'Space Grotesk',sans-serif;background:hsl(219,21%,92%);border:1px solid hsl(221,13%,74%);border-bottom-width:3px;color:hsl(222,17%,41%);transition:background .12s,border-color .12s}html[data-theme="light"] .kb-key.wide{width:220px;font-size:11px;letter-spacing:2px}html[data-theme="light"] .kb-key.next{background:hsl(212,25%,78%);border-color:hsl(210,100%,55%);color:hsl(0,0%,17%);animation:kb-pulse 1.2s ease-in-out infinite}@keyframes kb-pulse{0%,100%{box-shadow:0 0 0 0 rgba(108,180,255,.5)}50%{box-shadow:0 0 0 8px rgba(108,180,255,0)}}html[data-theme="light"] .f-lp{border-bottom-color:hsl(10,100%,53%)}html[data-theme="light"] .f-lr{border-bottom-color:hsl(42,100%,50%)}html[data-theme="light"] .f-lm{border-bottom-color:hsl(163,74%,43%)}html[data-theme="light"] .f-li{border-bottom-color:hsl(211,100%,51%)}html[data-theme="light"] .f-ri{border-bottom-color:hsl(261,100%,55%)}html[data-theme="light"] .f-rm{border-bottom-color:hsl(332,100%,55%)}html[data-theme="light"] .f-rr{border-bottom-color:hsl(195,100%,50%)}html[data-theme="light"] .f-rp{border-bottom-color:hsl(84,76%,43%)}html[data-theme="light"] .f-th{border-bottom-color:hsl(222,17%,44%)}html[data-theme="light"] .kb-legend{display:flex;gap:4px 14px;justify-content:center;flex-wrap:wrap;font-size:10px;color:hsl(222,17%,34%)}html[data-theme="light"] .kb-legend .dot{display:inline-block;width:8px;height:8px;border-radius:50%;margin-right:4px;vertical-align:-1px}html[data-theme="light"] .kb-legend .dot.f-lp{background:hsl(10,100%,53%)}html[data-theme="light"] .kb-legend .dot.f-lr{background:hsl(42,100%,50%)}html[data-theme="light"] .kb-legend .dot.f-lm{background:hsl(163,74%,43%)}html[data-theme="light"] .kb-legend .dot.f-li{background:hsl(211,100%,51%)}html[data-theme="light"] .kb-legend .dot.f-ri{background:hsl(261,100%,55%)}html[data-theme="light"] .kb-legend .dot.f-rm{background:hsl(332,100%,55%)}html[data-theme="light"] .kb-legend .dot.f-rr{background:hsl(195,100%,50%)}html[data-theme="light"] .kb-legend .dot.f-rp{background:hsl(84,76%,43%)}html[data-theme="light"] .kb-legend .dot.f-th{background:hsl(222,17%,44%)}html[data-theme="light"] #kbPill{display:block;margin:6px auto 0;border:1px dashed hsl(221,10%,78%);background:transparent;color:hsl(222,17%,41%);border-radius:999px;padding:4px 14px;font-size:12px;cursor:pointer}html[data-theme="light"] #kbPill:hover{color:hsl(211,100%,55%);border-color:hsl(216,16%,86%)}html[data-theme="light"] /* 键盘展开时压缩上方留白，保证整页不出滚动条 */
body.kb-guide-on .mode-label{margin-bottom:14px}html[data-theme="light"] body.kb-guide-on .prompt{margin-bottom:22px}html[data-theme="light"] body.kb-guide-on .feedback{margin-top:8px;height:22px}@media(max-height:800px){html[data-theme="light"] #kbGuide{gap:4px}html[data-theme="light"] .kb-key{height:26px;width:32px;font-size:12px}html[data-theme="light"] .kb-key.wide{width:190px}html[data-theme="light"] body.kb-guide-on .typing-display{margin-bottom:4px}}html[data-theme="light"] /* ===== 双舱共用外壳件：舱别徽章 / 抽屉遮罩 / 内容滚动区 ===== */
.cabin-chip{font-style:normal;font-size:11px;color:var(--acc);border:1px solid var(--acc-line);border-radius:999px;padding:2px 9px;margin-left:2px;flex:none;white-space:nowrap}html[data-theme="light"] .drawer-mask{display:none;position:absolute;z-index:4;inset:0;background:rgba(15,23,42,0.267)}html[data-theme="light"] .drawer-mask.open{display:block}html[data-theme="light"] .panel-scroll{flex:1;min-width:0;overflow-y:auto;padding:26px 32px 44px;-webkit-overflow-scrolling:touch;scrollbar-width:thin;scrollbar-color:hsl(215,14%,78%) transparent}html[data-theme="light"] .panel-scroll::-webkit-scrollbar{width:6px}html[data-theme="light"] .panel-scroll::-webkit-scrollbar-thumb{background:hsl(215,14%,78%);border-radius:3px}@media(max-width:800px){html[data-theme="light"] .panel-scroll{padding:16px 14px 78px}}html[data-theme="light"] /* ===== 双舱共用按钮：内容区里的次级 / 主级 / 危险操作 ===== */
.btn{border:1px solid var(--line);background:var(--panel);color:var(--text);border-radius:11px;padding:11px 20px;font-size:14px;cursor:pointer}html[data-theme="light"] .btn:hover{border-color:var(--acc-line);color:hsl(0,0%,17%)}html[data-theme="light"] .btn.primary{background:var(--acc);border-color:var(--acc);color:hsl(158,37%,92%);font-weight:700}html[data-theme="light"] .btn.danger{color:var(--red);border-color:hsl(11,19%,75%)}html[data-theme="light"] .btn.danger:hover{border-color:var(--red);color:hsl(9,100%,55%)}html[data-theme="light"] .btn:disabled{opacity:.35;cursor:not-allowed}@media(hover:none){html[data-theme="light"] .btn:hover{color:var(--text);border-color:var(--line)}html[data-theme="light"] .btn.primary:hover{color:hsl(158,37%,92%)}}html[data-theme="light"] /* ===== 教材目录抽屉（仅拼句舱 #drawer）：内容可滚动 + 课内单词预览 ===== */
#drawer{display:flex;flex-direction:column}html[data-theme="light"] #drawer .drawer-head,html[data-theme="light"] #drawer .drawer-sub{flex:none}html[data-theme="light"] #drawer .drawer-foot{flex:none;margin-top:14px}html[data-theme="light"] #chapterList{flex:1;min-height:0;overflow-y:auto;-webkit-overflow-scrolling:touch;touch-action:pan-y;margin:0 -20px;padding:0 20px 4px;scrollbar-width:thin;scrollbar-color:hsl(215,14%,78%) transparent}html[data-theme="light"] #chapterList::-webkit-scrollbar{width:6px}html[data-theme="light"] #chapterList::-webkit-scrollbar-thumb{background:hsl(215,14%,78%);border-radius:3px}html[data-theme="light"] /* ===== 选教材抽屉（听写舱 #pickDrawer）：教材多且单元多，头/尾固定、中间可滑动 =====
 * 之前手机上 .pick-units 被设成 max-height:none，而抽屉本身没有滚动容器，
 * 外壳又是 html,html[data-theme="light"] body{overflow:hidden}html[data-theme="light"] ，内容一超出就整页都滑不动。 */
#pickDrawer{display:flex;flex-direction:column}html[data-theme="light"] #pickDrawer .drawer-head,html[data-theme="light"] #pickDrawer .drawer-sub,html[data-theme="light"] #pickDrawer .drawer-foot{flex:none}html[data-theme="light"] #pickDrawer .drawer-foot{margin-top:14px}html[data-theme="light"] .pick-scroll{flex:1;min-height:0;overflow-y:auto;-webkit-overflow-scrolling:touch;touch-action:pan-y;overscroll-behavior:contain;margin:0 -20px;padding:0 20px 4px;scrollbar-width:thin;scrollbar-color:hsl(215,14%,78%) transparent}html[data-theme="light"] .pick-scroll::-webkit-scrollbar{width:6px}html[data-theme="light"] .pick-scroll::-webkit-scrollbar-thumb{background:hsl(215,14%,78%);border-radius:3px}html[data-theme="light"] /* ===== 选教材抽屉里的「看词表」：选中单元前先看清这个单元有哪些单词 ===== */
.unit-item{position:relative;margin-bottom:7px}html[data-theme="light"] .unit-item.no-toggle{margin-bottom:0}html[data-theme="light"] .unit-item .unit-row{margin-bottom:0}html[data-theme="light"] /* 单元行 + 「看词表」开关并排，省下一行高度（小屏很宝贵） */
.uw-head{display:flex;align-items:stretch;gap:5px}html[data-theme="light"] .uw-head>.unit-row{flex:1 1 auto;min-width:0}html[data-theme="light"] .uw-toggle{flex:none;align-self:center;margin:0;border:1px solid hsl(216,14%,92%);background:hsl(218,23%,92%);color:hsl(211,73%,51%);font-size:10.5px;cursor:pointer;padding:4px 8px;border-radius:7px;white-space:nowrap;touch-action:manipulation}html[data-theme="light"] .uw-toggle:hover{border-color:hsl(210,100%,49%);color:hsl(211,100%,55%);background:hsl(211,18%,92%)}html[data-theme="light"] .uw-toggle.open{color:hsl(204,100%,55%);border-color:hsl(211,19%,80%)}html[data-theme="light"] /* 展开的词表 */
.uw-wrap{display:none;margin:5px 0 8px}html[data-theme="light"] .uw-wrap.open{display:block}html[data-theme="light"] /* 词表：流式自动换行。**不要**在 .uw-box 上加任何 overflow/max-height ——
 * 内层一旦自己滚动，手指就被它吃掉，够不到上下的教材与单元了。
 * 整张抽屉只有 .pick-scroll 一个滚动容器。
 * chip 要尽量矮：小屏上「单元行 + 词表」必须能塞进一屏，否则怎么滚都看不全。 */
.uw-box{display:flex;flex-wrap:wrap;gap:4px;background:hsl(219,24%,92%);border:1px solid hsl(218,13%,92%);border-radius:10px;padding:5px 6px;margin:0 0 8px;align-items:flex-start}html[data-theme="light"] .uw-row{display:inline-flex;flex-wrap:wrap;align-items:center;gap:0 3px;max-width:100%;border:1px solid hsl(215,16%,92%);background:hsl(217,22%,92%);border-radius:7px;padding:2px 3px 2px 7px;line-height:1.3}html[data-theme="light"] .uw-row b{font-weight:500;font-size:12px;color:hsl(214,43%,55%);overflow-wrap:anywhere}html[data-theme="light"] .uw-row small{font-size:10.5px;color:hsl(219,16%,40%);overflow-wrap:anywhere}html[data-theme="light"] .uw-spk{flex:none;border:0;background:none;color:hsl(213,28%,39%);cursor:pointer;padding:1px;display:grid;place-items:center;touch-action:manipulation}html[data-theme="light"] .uw-spk:hover{color:hsl(212,100%,55%)}html[data-theme="light"] .uw-spk .ic{width:13px;height:13px}html[data-theme="light"] /* 课行上的「词表」开关 */
.ch-prev{flex:none;border:0;background:none;color:hsl(212,42%,39%);font-size:11px;cursor:pointer;padding:7px 9px;border-radius:8px;white-space:nowrap}html[data-theme="light"] .ch-prev:hover{background:hsl(211,18%,92%);color:hsl(212,100%,55%)}html[data-theme="light"] .chapter.open{background:hsl(217,20%,92%);color:hsl(212,47%,55%)}html[data-theme="light"] /* 展开后的本课句子列表（目录抽屉与学习路径弹窗共用行样式） */
.ch-words,html[data-theme="light"] .path-words{background:hsl(219,24%,92%);border:1px solid hsl(218,13%,92%);border-radius:10px;scrollbar-width:thin;scrollbar-color:hsl(215,14%,78%) transparent}html[data-theme="light"] .ch-words{display:none;margin:2px 0 10px;max-height:46vh;overflow-y:auto;-webkit-overflow-scrolling:touch;touch-action:pan-y;padding:5px 8px}html[data-theme="light"] .ch-words.open{display:block}html[data-theme="light"] .path-words{display:none;margin:2px 0 10px;padding:6px 10px}html[data-theme="light"] .path-words.open{display:block;max-height:52vh;overflow-y:auto;-webkit-overflow-scrolling:touch;touch-action:pan-y}html[data-theme="light"] .wrow{display:flex;align-items:baseline;gap:10px;padding:7px 8px;border-bottom:1px solid hsl(221,16%,92%);border-radius:6px;cursor:pointer}html[data-theme="light"] .wrow:last-child{border-bottom:0}html[data-theme="light"] .wrow:hover{background:hsl(219,21%,92%)}html[data-theme="light"] .wrow b{flex:1.1;min-width:0;font-weight:500;font-size:12.5px;color:hsl(214,43%,55%);overflow-wrap:anywhere}html[data-theme="light"] .wrow small{flex:1;color:hsl(220,17%,34%);font-size:11px;line-height:1.5}html[data-theme="light"] .wrow.done b{color:hsl(150,18%,40%)}html[data-theme="light"] .wrow.cur{background:hsl(210,24%,92%)}html[data-theme="light"] .wrow.cur b{color:hsl(212,100%,55%)}html[data-theme="light"] .wspk{flex:none;border:0;background:none;color:hsl(213,28%,39%);cursor:pointer;padding:2px;display:grid;place-items:center}html[data-theme="light"] .wspk:hover{color:hsl(212,100%,55%)}html[data-theme="light"] .wspk .ic{width:14px;height:14px}html[data-theme="light"] /* 学习路径弹窗里的二级课行 */
.p-ch{display:flex;align-items:center;gap:8px;padding:8px 6px;border-bottom:1px solid hsl(221,16%,92%);cursor:pointer;font-size:12px;color:hsl(222,16%,48%)}html[data-theme="light"] .p-ch:last-of-type{border-bottom:0}html[data-theme="light"] .p-ch:hover{color:hsl(214,43%,55%)}html[data-theme="light"] .p-ch b{flex:1;font-size:12.5px;color:hsl(217,26%,55%)}html[data-theme="light"] .p-ch small{color:hsl(223,17%,34%);flex:none}html[data-theme="light"] .p-ch .tw{color:hsl(212,42%,39%);transition:transform .15s;font-style:normal}html[data-theme="light"] .p-ch.open .tw{transform:rotate(90deg)}html[data-theme="light"] .path-prev{flex:none;border:1px solid hsl(211,8%,79%);background:hsl(210,11%,92%);color:hsl(212,18%,55%);border-radius:9px;padding:8px 12px;font-size:12px;cursor:pointer;white-space:nowrap}html[data-theme="light"] .path-prev:hover{border-color:hsl(210,100%,49%);color:hsl(211,100%,55%);background:hsl(211,18%,92%)}@media(hover:none){html[data-theme="light"] .path-prev:hover{background:hsl(210,11%,92%);color:hsl(212,18%,55%);border-color:hsl(211,8%,79%)}html[data-theme="light"] .wrow:hover{background:none}html[data-theme="light"] .p-ch:hover{color:hsl(222,16%,48%)}}