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span:last-child{margin-left:auto}#toast{position:fixed;left:50%;bottom:25px;transform:translateX(-50%);max-width:90%;background:#254d3fef;color:#fff;padding:13px 22px;font-size:12px;line-height:1.7;border-radius:8px;opacity:0;pointer-events:none;transition:opacity .2s;z-index:100}#toast.show{opacity:1}@media(min-width:1550px){main{padding:0 60px}.lesson-cover{height:195px}.cue-list,#dictation{height:710px}}@media(max-width:1170px){.sidebar{width:178px;padding:28px 16px}main{margin-left:178px;padding:0 25px}.page-intro h1{font-size:23px}.edition{display:none}.lesson-grid,.word-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.studio-grid{gap:16px}.studio-title-actions{max-width:160px;justify-content:flex-end}.studio-title h1{font-size:19px}.transcript-heading{padding:18px}.mode-tabs{gap:20px;padding:0 18px}.mode-tabs>span{display:none}.transport{gap:6px;padding:13px 10px}.transport #volume{width:30px}.training-bar button{font-size:8px;padding:8px 5px}.training-settings{gap:8px}.record-actions{gap:7px}.record-actions .text-btn{font-size:9px}.stats-cards{grid-template-columns:repeat(2,1fr)}.review-banner{flex-wrap:wrap}}@media(max-width:830px){.sidebar{position:relative;width:100%;padding:17px 20px;flex-direction:row;align-items:center;gap:25px;flex-wrap:wrap}.brand{font-size:20px}.brand>span{width:35px;height:35px;font-size:30px}.brand small{font-size:7px}.nav-label,.sidebar-tip,.local-status{display:none}.sidebar nav{flex-direction:row;gap:4px;flex:1;justify-content:flex-end}.sidebar nav button{padding:9px 8px;font-size:10px;gap:6px;white-space:nowrap}.sidebar nav b{font-size:13px;width:auto}.sidebar nav i{display:none}main{margin:0;padding:0 20px}header{height:65px}.header-actions{gap:6px}.header-actions .text-btn{font-size:9px}.crumb{font-size:9px}.crumb span{margin:0 6px}.page-intro{padding:29px 0 23px}.page-intro h1 em{display:block}.page-intro p{font-size:10px;max-width:320px}.stat-strip{padding:18px 20px;flex-wrap:wrap;margin-bottom:25px}.stat-strip strong{font-size:23px}.stat-strip>div{padding-left:15px}.stat-strip>button{display:none}.stat-strip span{font-size:9px}.stat-strip small{font-size:8px}.lesson-grid{gap:16px}.library-guide>span{display:none}.library-guide{align-items:flex-start;flex-wrap:wrap}.library-guide button{margin-left:0}.studio-grid{grid-template-columns:1fr;gap:20px}.cue-list{height:500px}.shortcuts{padding:16px 0 0}.mode-tabs>span{display:block}.transport{gap:12px;padding:15px}.training-bar button{font-size:11px}.studio-title-actions{max-width:180px}.cue-en{font-size:16px}.cue-zh{font-size:12px}.review-banner .primary{margin-left:0}.activity-chart{gap:7px}footer{flex-wrap:wrap;gap:10px}footer span:last-child{margin-left:0}}@media(max-width:560px){.sidebar{padding:15px 17px;gap:14px}.sidebar nav{width:100%;flex-basis:100%;justify-content:space-between;border-top:1px solid #eef2e7;padding-top:10px}.sidebar nav button{font-size:10px;flex-direction:column;gap:4px;padding:6px 10px}.sidebar nav b{font-size:16px}.sidebar nav button.active{background:none;color:#376133}main{padding:0 16px}header{height:61px}.crumb{display:none}.header-actions{width:100%;justify-content:flex-end}.page-intro h1{font-size:23px}.eyebrow{font-size:8px;letter-spacing:1.8px}.page-intro{align-items:flex-start;flex-wrap:wrap}.stat-strip{padding:18px 14px}.stat-strip>div{padding-left:12px}.stat-strip strong{font-size:22px}.stat-strip small{display:block;margin:4px 0 0}.lesson-grid,.word-grid{grid-template-columns:1fr}.lesson-cover{height:180px}.lesson-cover h3{font-size:31px;max-width:210px}.section-bar h2{font-size:14px}.search{padding:8px 9px}.search input{width:145px;font-size:9px}.filter-row{gap:1px}.filter-row button{font-size:9px;padding:7px 9px}.filter-row>span{display:none}.studio-title{flex-wrap:wrap;align-items:flex-start}.studio-title-actions{max-width:none}.demo-art{padding:28px}.demo-art h2{font-size:35px;margin-top:20px}.demo-art small{bottom:32px}.player-caption{font-size:11px}.transport{gap:8px}.transport #volume{width:30px}.transport select{font-size:9px;width:40px}.training-bar button{font-size:9px}.practice-card,.note-card{padding:17px}.record-actions .outline{padding:9px}.record-actions .text-btn{font-size:9px}.cue-list{height:480px}.mode-tabs>span{font-size:8px}.cue{padding:15px 10px}.cue-en{font-size:15px}.cue-zh{font-size:11px}.form-grid{grid-template-columns:1fr;gap:0}dialog{padding:23px}.review-banner{padding:19px}.saved-sentence .source{flex-wrap:wrap}.activity-card{padding:19px}.activity-chart{gap:4px}.stats-card{padding:21px}.stats-card strong{font-size:28px}.stats-cards{gap:12px}}

.demo-art>small{top:14px;right:16px;bottom:auto;font-size:7px}.lesson-progress progress::-webkit-progress-bar{background:#edf1e6;border-radius:4px}.lesson-progress progress::-webkit-progress-value{background:#a3bd81;border-radius:4px}

@media(max-width:830px){.media-column{display:contents}.studio-grid{gap:0}.player{order:1}.transport{order:2}.training-bar{order:3}.training-settings{order:4}.transcript{order:5;margin-top:20px}.practice-card{order:6}.note-card{order:7}.shortcuts{order:8}}

.youtube-settings{padding:14px;background:#fff;border-bottom:1px solid var(--line);display:flex;gap:12px;align-items:center;flex-wrap:wrap;font-size:11px}.youtube-settings input{width:85px;padding:6px;border:1px solid var(--line);border-radius:5px}.youtube-settings small{color:#75836f;line-height:1.7}.youtube-settings a{color:var(--green)}#youtubeFrame{width:100%;height:100%;min-height:200px;border:0}.player:has(#youtubeFrame){min-height:200px}.player:has(#youtubeFrame) .big-play,.player:has(#youtubeFrame) .player-caption{display:none}#importSource,#youtubeLink{width:100%;padding:10px;border:1px solid var(--line);border-radius:6px;background:#fff}

.nav-more{display:contents}
#navMoreBtn{display:none}
#navMoreMenu{display:contents}

@media(max-width:560px){
  .nav-more{display:flex;position:relative;flex:0 0 auto}
  #navMoreBtn{display:flex;flex-direction:column;align-items:center;gap:4px;padding:6px 10px;font-size:10px;color:#84907e;border-radius:8px;line-height:1.2}
  #navMoreBtn b{font-size:16px;font-weight:400}
  #navMoreBtn.active{color:#376133}
  #navMoreBtn[aria-expanded=true]{background:#edf3e8;color:#355b43}
  #navMoreMenu{display:none;position:absolute;right:0;top:calc(100% + 10px);min-width:162px;background:#fff;border:1px solid #e4e9de;border-radius:12px;box-shadow:0 18px 44px #122b2526;padding:6px;z-index:70;flex-direction:column;gap:2px}
  .nav-more.open #navMoreMenu{display:flex}
  #navMoreMenu button{display:flex;flex-direction:row;align-items:center;gap:10px;padding:11px 12px;border-radius:8px;font-size:11px;color:#6f7f63;text-align:left;white-space:nowrap;width:100%}
  #navMoreMenu button:hover{background:#f2f6ec}
  #navMoreMenu button.active{background:#edf3e8;color:#355b43}
  #navMoreMenu button b{font-size:14px;width:16px;text-align:center;font-weight:400}
  #navMoreMenu button i{margin-left:auto;display:inline-block;font-style:normal;font-size:9px;background:#e5ecdc;border-radius:4px;padding:2px 5px}
}

/* ===== 移动端可达性（v9）：触控目标 ≥44px、正文 ≥12px、输入框 16px 防 iOS 自动缩放 ===== */
@media (max-width: 560px) {
  /* 顶部操作：登录 / 备份 / 恢复 / 新建素材 */
  .header-actions .text-btn,
  .header-actions .account-btn {
    min-height: 44px;
    min-width: 44px;
    padding: 0 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
  }
  .header-actions .primary.small,
  .header-actions .outline.small {
    min-height: 44px;
    padding: 0 15px;
    font-size: 12px;
  }
  /* 素材库筛选 chip 与 CEFR 下拉 */
  .filter-row { gap: 6px; flex-wrap: wrap; }
  .filter-row button {
    min-height: 40px;
    padding: 0 13px;
    font-size: 12px;
    display: inline-flex;
    align-items: center;
  }
  .cefr-filter { font-size: 11px; }
  .cefr-filter select {
    min-height: 40px;
    font-size: 12px;
    padding: 0 10px;
  }
  /* 行内文字按钮（练习卡、设置区） */
  .text-btn { min-height: 34px; padding: 0 8px; font-size: 12px; }
  .tiny { min-height: 34px; font-size: 12px; }
  /* 训练模式条 */
  .training-bar button { min-height: 40px; font-size: 11px; }
  .mode-tabs button { padding: 12px 0; font-size: 12px; }

  /* 输入框 16px：避免 iOS Safari 聚焦时整页放大 */
  input:not([type]),
  input[type=text],
  input[type=search],
  input[type=email],
  input[type=password],
  input[type=url],
  textarea { font-size: 16px; }
  .search input { font-size: 16px; }
  .search { min-height: 44px; }

  /* 可读性：关键正文与说明不再低于 12px */
  .cue-zh { font-size: 12px; }
  .hint { font-size: 11px; line-height: 1.9; }
  .eyebrow { font-size: 10px; }
  .section-bar > span, .section-bar > div > span { font-size: 11px; }
  .stat-strip span { font-size: 11px; }
  .stat-strip small { font-size: 10px; }
  #navMoreMenu button { min-height: 44px; }
  #navMoreMenu button i { font-size: 10px; }
}

@media (max-width: 560px) {
  /* 素材卡底部操作：开始学习 / 重命名 / 从列表移除 */
  .card-bottom { gap: 10px; flex-wrap: wrap; }
  .card-bottom .text-btn { min-height: 40px; padding: 0 12px; font-size: 12px; }
  .card-tools { gap: 4px; }
  .card-tools button { min-height: 40px; min-width: 44px; padding: 0 8px; font-size: 12px; }
  .lesson-card-body p { font-size: 11px; }
}

@media (max-width: 560px) {
  /* 播放器与逐句工具：这些小图标按钮在手机上最容易点空 */
  #playBtn { width: 42px; height: 42px; font-size: 16px; }
  .transport select { min-height: 36px; font-size: 12px; padding: 0 2px; }
  .transport .text-btn, .transport .outline { min-height: 40px; }
  .cue-tools { gap: 2px; }
  .cue-tools button { min-width: 40px; min-height: 40px; font-size: 15px; }
  .cue-top .time { min-height: 32px; padding: 0 6px; display: inline-flex; align-items: center; }
  #originalBtn, #ownBtn { min-width: 36px; min-height: 36px; }
  #manualLevel, #subtitleMode, .transcript-heading select { min-height: 36px; font-size: 12px; }
  #backLibrary { min-height: 40px; padding: 0 8px; }
  .studio-title-actions .outline.small { min-height: 40px; }
  .record-actions .record, .record-actions .outline, .record-actions .text-btn { min-height: 40px; }
  .training-bar button { min-height: 44px; }
  .practice-card .section-bar .text-btn, .note-actions .text-btn { min-height: 40px; }
  .rating-row button { min-height: 48px; }
}

@media (max-width: 560px) {
  /* 模式切换与训练设置下拉 */
  .mode-tabs { gap: 4px; padding: 0 14px; }
  .mode-tabs button { min-height: 44px; padding: 0 10px; font-size: 12px; }
  .training-settings select { min-height: 36px; font-size: 12px; }
  .training-settings { font-size: 11px; gap: 8px; }
  .record-actions button { min-height: 40px; }
  #fullscreenBtn { min-width: 40px; min-height: 40px; }
  .difficulty-actions .outline.small, .difficulty-actions .text-btn { min-height: 40px; }
}
@media (max-width: 560px) {
  .tiny { min-height: 40px; }
  .cue-top .time { min-height: 36px; }
  .note-actions button { min-height: 40px; }
}