/*!
 * 灵谷设计体系 v2.1 · 增强层
 * 补全令牌色阶 + 质感光感 + 动效弹性 + 学习场景组件
 * 不覆盖 app.css，通过 CSS 层叠补全
 */
:root{--lingu-jade-300:#b8e0d4;--lingu-jade-200:#c8e6dc;--lingu-gold-400:#d4a040;--lingu-gold-200:#fce8b8;--lingu-vermilion-700:#962f29;--lingu-vermilion-050:#fde7e4;--lingu-sky-800:#164769;--lingu-sky-600:#1265b3;--lingu-sky-500:#1598d3;--lingu-sky-150:#d7e8f4;--lingu-sky-100:#e7f4fb;--lingu-danger:#b42318;--lingu-warning:#985616;--lingu-success:#28743b;--lingu-shadow-brand:0 8px 24px #147d6420;--lingu-shadow-gold:0 8px 24px #c58a1b26;--lingu-inner-highlight:inset 0 1px 0 #ffffff26;--lingu-focus:0 0 0 3px #1265b33d;--lingu-score-high-bg:#e2f2e9;--lingu-score-high-text:#126346;--lingu-score-mid-bg:#fff2c9;--lingu-score-mid-text:#765500;--lingu-score-low-bg:#fde7e4;--lingu-score-low-text:#962f29;--lingu-score-none-bg:#edf2ef;--lingu-score-none-text:#8a9995;--lingu-recording-ring:#d8473f;--lingu-recording-glow:#d8473f1f;--lingu-ease-out:cubic-bezier(.22, 1, .36, 1);--lingu-ease-spring:cubic-bezier(.34, 1.56, .64, 1);--lingu-dur-fast:.12s;--lingu-dur-normal:.18s;--lingu-dur-slow:.28s;--lingu-text-kicker:11px;--lingu-text-caption:12px;--lingu-text-body:14px;--lingu-text-lead:16px;--lingu-text-lineheight:1.7}.lingu-record-ring{width:72px;height:72px;color:var(--lingu-jade-700);--ring-color:#147d64d9;--ring-progress:0%;background:conic-gradient(var(--ring-color) var(--ring-progress), #d9e6e1 0);cursor:pointer;transition:transform var(--lingu-dur-normal) var(--lingu-ease-out);box-shadow:var(--lingu-shadow-brand), var(--lingu-inner-highlight);border:1px solid #147d6447;border-radius:50%;flex-direction:column;justify-content:center;align-items:center;display:flex;position:relative}.lingu-record-ring:before{content:"";background:var(--lingu-surface);border-radius:50%;position:absolute;inset:5px}.lingu-record-ring>*{z-index:1;position:relative}.lingu-record-ring svg{width:22px;height:22px}.lingu-record-ring span{margin-top:2px;font-size:10px;font-weight:800}.lingu-record-ring:hover{transform:scale(1.05)}.lingu-record-ring:active{transform:scale(.96)}.lingu-record-ring.is-recording{--ring-color:var(--lingu-recording-ring);border-color:var(--lingu-recording-ring);box-shadow:0 0 0 3px var(--lingu-recording-glow), var(--lingu-inner-highlight);color:var(--lingu-recording-ring);animation:1.15s infinite lingu-rec-pulse}.lingu-record-ring.is-evaluating{--ring-color:var(--lingu-gold-500);color:var(--lingu-gold-600)}.lingu-record-ring.is-evaluating svg{animation:1s linear infinite lingu-spin}.lingu-record-ring.is-complete{--ring-color:var(--lingu-jade-600);--ring-progress:100%;color:var(--lingu-jade-600)}@keyframes lingu-rec-pulse{0%,to{box-shadow:0 0 0 3px var(--lingu-recording-glow), var(--lingu-inner-highlight)}50%{box-shadow:0 0 0 8px #d8473f0a, var(--lingu-inner-highlight)}}@keyframes lingu-spin{to{transform:rotate(360deg)}}.lingu-recwave{align-items:center;gap:3px;height:36px;display:flex}.lingu-recwave i{background:linear-gradient(#0d8a65,#0b766e);border-radius:2px;width:4px;animation:.7s ease-in-out infinite alternate lingu-wave;display:block}.lingu-recwave i:nth-child(2){animation-delay:.1s}.lingu-recwave i:nth-child(3){animation-delay:.2s}.lingu-recwave i:nth-child(4){animation-delay:.3s}.lingu-recwave i:nth-child(5){animation-delay:.15s}.lingu-recwave i:nth-child(6){animation-delay:.25s}.lingu-recwave i:nth-child(7){animation-delay:50ms}@keyframes lingu-wave{0%{height:8px}to{height:34px}}.lingu-word-score{border-radius:var(--lingu-radius-sm);cursor:pointer;transition:all var(--lingu-dur-fast) var(--lingu-ease-out);border:0;align-items:center;gap:4px;padding:6px 10px;font-family:inherit;font-size:13px;font-weight:600;display:inline-flex}.lingu-word-score small{opacity:.7;font-size:10px;font-family:var(--font-mono,ui-monospace, monospace)}.lingu-word-score.score-high{background:var(--lingu-score-high-bg);color:var(--lingu-score-high-text)}.lingu-word-score.score-mid{background:var(--lingu-score-mid-bg);color:var(--lingu-score-mid-text)}.lingu-word-score.score-low{background:var(--lingu-score-low-bg);color:var(--lingu-score-low-text)}.lingu-word-score.score-none{background:var(--lingu-score-none-bg);color:var(--lingu-score-none-text)}.lingu-word-score.is-pending{filter:saturate(.45);opacity:.32}.lingu-word-score.is-speaking{filter:saturate(1.2);outline:2px solid var(--lingu-gold-500);outline-offset:2px;transform:translateY(-2px)}.lingu-word-score:hover{transform:translateY(-1px)}.lingu-score-ribbon{border:1px solid var(--lingu-line);border-radius:var(--lingu-radius-md);background:var(--lingu-surface);box-shadow:var(--lingu-shadow-soft);grid-template-columns:repeat(4,1fr);gap:0;display:grid;overflow:hidden}.lingu-score-chip{text-align:center;border-left:1px solid var(--lingu-line-soft);padding:14px 8px}.lingu-score-chip:first-child{border-left:0}.lingu-score-chip strong{color:var(--lingu-jade-700);font-size:22px;font-weight:900;display:block}.lingu-score-chip span{color:var(--lingu-ink-500);font-size:10px}@media (width<=520px){.lingu-score-ribbon{grid-template-columns:repeat(2,1fr)}.lingu-score-chip:nth-child(3){border-left:0}}.lingu-caption-word{border-radius:var(--lingu-radius-sm);transition:all var(--lingu-dur-fast) var(--lingu-ease-out);cursor:pointer;padding:2px 4px;display:inline}.lingu-caption-word.is-pending{opacity:.32}.lingu-caption-word.is-speaking{background:var(--lingu-jade-100);color:var(--lingu-jade-700);display:inline-block;transform:translateY(-2px)}.lingu-caption-word.is-spoken{opacity:1}.lingu-confirm-overlay{-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);z-index:9999;background:#173d436b;justify-content:center;align-items:center;padding:20px;display:none;position:fixed;inset:0}.lingu-confirm-overlay.is-open{animation:lingu-fade-in var(--lingu-dur-normal) var(--lingu-ease-out);display:flex}.lingu-confirm-modal{background:var(--lingu-surface);border-radius:var(--lingu-radius-lg);box-shadow:var(--lingu-shadow-raised), var(--lingu-inner-highlight);width:100%;max-width:380px;animation:lingu-modal-in var(--lingu-dur-slow) var(--lingu-ease-spring);overflow:hidden}.lingu-confirm-head{border-bottom:1px solid var(--lingu-line-soft);justify-content:space-between;align-items:center;padding:16px 20px;display:flex}.lingu-confirm-head h3{margin:0;font-size:16px;font-weight:700}.lingu-confirm-close{color:var(--lingu-ink-500);cursor:pointer;background:0 0;border:0;justify-content:center;align-items:center;padding:4px;display:flex}.lingu-confirm-close svg{width:18px;height:18px}.lingu-confirm-body{color:var(--lingu-ink-700);padding:20px;font-size:14px;line-height:1.7}.lingu-confirm-foot{justify-content:flex-end;gap:10px;padding:0 20px 20px;display:flex}@keyframes lingu-fade-in{0%{opacity:0}to{opacity:1}}@keyframes lingu-modal-in{0%{opacity:0;transform:scale(.92)translateY(12px)}to{opacity:1;transform:scale(1)translateY(0)}}.lingu-spirit-particles:before{content:"";pointer-events:none;z-index:0;background-image:radial-gradient(2px at 20% 30%,#0d8a6566,#0000),radial-gradient(1.5px at 70% 20%,#d4a0404d,#0000),radial-gradient(2px at 85% 60%,#0d8a654d,#0000),radial-gradient(1px at 40% 70%,#f3d89766,#0000);position:absolute;inset:0}.lingu-button--primary{background:linear-gradient(135deg, var(--lingu-jade-600), var(--lingu-jade-500));box-shadow:var(--lingu-shadow-brand), var(--lingu-inner-highlight);transition:transform var(--lingu-dur-normal) var(--lingu-ease-out), box-shadow var(--lingu-dur-normal) var(--lingu-ease-out)}.lingu-button--primary:hover{box-shadow:var(--lingu-shadow), var(--lingu-inner-highlight);transform:translateY(-1px)}.lingu-button--primary:active{transform:translateY(0)}.lingu-card-raised{border:1px solid var(--lingu-line);border-radius:var(--lingu-radius-md);background:var(--lingu-surface);box-shadow:var(--lingu-shadow-soft), var(--lingu-inner-highlight);transition:transform var(--lingu-dur-normal) var(--lingu-ease-out), box-shadow var(--lingu-dur-normal) var(--lingu-ease-out)}.lingu-card-raised:hover{box-shadow:var(--lingu-shadow), var(--lingu-inner-highlight);transform:translateY(-2px)}.student-bottom-nav{box-shadow:0 -4px 24px #17332d0f, var(--lingu-inner-highlight)}.student-bottom-nav a{transition:color var(--lingu-dur-fast) var(--lingu-ease-out), transform var(--lingu-dur-fast) var(--lingu-ease-out)}.student-bottom-nav a:active{transform:scale(.92)}.student-bottom-nav a.is-active{color:var(--lingu-jade-600)}.student-nav-dock-menu{box-shadow:var(--lingu-shadow-raised), var(--lingu-inner-highlight);border:1px solid var(--lingu-line)}.student-nav-dock-menu a{transition:background var(--lingu-dur-fast) var(--lingu-ease-out), color var(--lingu-dur-fast) var(--lingu-ease-out)}.student-nav-dock-menu a:hover{background:var(--lingu-jade-075);color:var(--lingu-jade-700)}.course-topic-subtitle-item{transition:background var(--lingu-dur-fast) var(--lingu-ease-out), box-shadow var(--lingu-dur-fast) var(--lingu-ease-out)}.course-topic-subtitle-item.is-active{background:linear-gradient(90deg, var(--lingu-jade-100), var(--lingu-surface));box-shadow:inset 3px 0 0 var(--lingu-jade-600), var(--lingu-inner-highlight)}.course-topic-subtitle-item:hover{background:var(--lingu-jade-075)}.course-topic-current-subtitle.has-text{background:linear-gradient(135deg, var(--lingu-jade-050), var(--lingu-surface));border-radius:var(--lingu-radius-md);box-shadow:var(--lingu-shadow-soft), var(--lingu-inner-highlight)}.course-topic-subtitle-text .lingu-caption-word,.course-topic-current-subtitle .lingu-caption-word{border-radius:var(--lingu-radius-sm);transition:all var(--lingu-dur-fast) var(--lingu-ease-out);padding:1px 3px;display:inline}.lingu-dh-compose-btn.is-record{transition:background var(--lingu-dur-fast) var(--lingu-ease-out), transform var(--lingu-dur-fast) var(--lingu-ease-out), box-shadow var(--lingu-dur-fast) var(--lingu-ease-out);box-shadow:var(--lingu-inner-highlight)}.lingu-dh-compose-btn.is-record:hover{transform:scale(1.08)}.lingu-dh-compose-btn.is-record:active{transform:scale(.94)}.lingu-dh-compose-btn.is-record.is-recording{background:var(--lingu-recording-ring);color:#fff;box-shadow:0 0 0 3px var(--lingu-recording-glow), var(--lingu-inner-highlight);animation:1.15s infinite lingu-rec-pulse}.lingu-dh-wave{border-radius:var(--lingu-radius-md);background:linear-gradient(180deg, var(--lingu-jade-050), var(--lingu-surface-soft));box-shadow:var(--lingu-inner-highlight)}.lingu-dh-wave .recwave-bar{background:linear-gradient(180deg, var(--lingu-jade-400), var(--lingu-jade-600));border-radius:2px}.lingu-dh-compose-btn.is-send{background:linear-gradient(135deg, var(--lingu-jade-600), var(--lingu-jade-500));box-shadow:var(--lingu-shadow-brand), var(--lingu-inner-highlight);transition:transform var(--lingu-dur-fast) var(--lingu-ease-out)}.lingu-dh-compose-btn.is-send:hover{transform:scale(1.08)}.lingu-dh-compose-btn.is-send:active{transform:scale(.94)}.lingu-wordcloud-tts-word{transition:background var(--lingu-dur-fast) var(--lingu-ease-out), color var(--lingu-dur-fast) var(--lingu-ease-out), transform var(--lingu-dur-fast) var(--lingu-ease-out);border-radius:var(--lingu-radius-sm);padding:1px 3px}.lingu-wordcloud-tts-word.is-speaking{background:var(--lingu-jade-100);color:var(--lingu-jade-700);display:inline-block;transform:translateY(-2px)}.wc-smart-icon-btn{transition:transform var(--lingu-dur-fast) var(--lingu-ease-out), box-shadow var(--lingu-dur-fast) var(--lingu-ease-out);box-shadow:var(--lingu-inner-highlight)}.wc-smart-icon-btn:hover{transform:scale(1.1)}.wc-smart-icon-btn:active{transform:scale(.92)}.lingu-wordbook-tools button{transition:background var(--lingu-dur-fast) var(--lingu-ease-out), color var(--lingu-dur-fast) var(--lingu-ease-out), transform var(--lingu-dur-fast) var(--lingu-ease-out)}.lingu-wordbook-tools button:active{transform:scale(.94)}.lingu-wordbook-tools button.is-active{background:linear-gradient(135deg, var(--lingu-jade-600), var(--lingu-jade-500));color:#fff;box-shadow:var(--lingu-shadow-brand), var(--lingu-inner-highlight)}.lingu-button--icon{transition:transform var(--lingu-dur-fast) var(--lingu-ease-out), background var(--lingu-dur-fast) var(--lingu-ease-out)}.lingu-button--icon:hover{background:var(--lingu-jade-075)}.lingu-button--icon:active{transform:scale(.92)}.student-page-hero,.lingu-module-hero{box-shadow:var(--lingu-shadow), var(--lingu-inner-highlight)}.lingu-module-identity span{background:linear-gradient(135deg, var(--lingu-jade-600), var(--lingu-jade-500));box-shadow:var(--lingu-shadow-brand), var(--lingu-inner-highlight)}.lingu-practice-feedback{background:linear-gradient(90deg, var(--lingu-jade-100), var(--lingu-jade-050));border-left:3px solid var(--lingu-jade-600);border-radius:var(--lingu-radius-md);box-shadow:var(--lingu-shadow-soft)}.lingu-dh-live-dot,.lingu-dh-online-dot{animation:2s ease-in-out infinite lingu-live-pulse}@keyframes lingu-live-pulse{0%,to{opacity:1;box-shadow:0 0 0 0 var(--lingu-jade-400)}50%{opacity:.7;box-shadow:0 0 0 4px #0000}}.lingu-course-headline-player{border-radius:var(--lingu-radius-lg);box-shadow:var(--lingu-shadow), var(--lingu-inner-highlight);overflow:hidden}.lingu-course-headline-strip a{transition:transform var(--lingu-dur-fast) var(--lingu-ease-out), box-shadow var(--lingu-dur-fast) var(--lingu-ease-out)}.lingu-course-headline-strip a:hover{transform:translateY(-2px)}.lingu-course-headline-strip a.is-active{box-shadow:var(--lingu-shadow-brand), var(--lingu-inner-highlight)}.course-report-hero{border-radius:var(--lingu-radius-lg);background:linear-gradient(135deg, var(--lingu-jade-800), var(--lingu-jade-600));color:#fff;box-shadow:var(--lingu-shadow-brand);flex-wrap:wrap;justify-content:space-between;align-items:flex-end;gap:16px 24px;padding:20px 22px;display:flex}.course-report-hero h1{font-family:var(--lingu-font-heading);margin:4px 0 6px;font-size:22px;font-weight:900;line-height:1.3}.course-report-hero p{font-size:var(--lingu-text-caption);color:#ffffffb3;margin:0}.course-report-overview{gap:10px;margin:0;display:flex}.course-report-overview div{border-radius:var(--lingu-radius-md);text-align:center;background:#ffffff1a;min-width:86px;padding:10px 14px}.course-report-overview dt{color:#ffffffa3;font-size:11px}.course-report-overview dd{font-family:var(--lingu-font-heading);margin:2px 0 0;font-size:20px;font-weight:900}.course-report-tabs{margin-top:18px}.course-report-tabs .cr-tab-badge{border-radius:var(--lingu-radius-pill);background:var(--lingu-jade-100);color:var(--lingu-jade-700);margin-left:6px;padding:1px 7px;font-size:11px;font-weight:800}.course-report-panels{margin-top:16px}.course-report-panel{animation:cr-fade-in var(--lingu-dur-slow,.28s) var(--lingu-ease-out);display:none}.course-report-panel.is-active{display:block}@keyframes cr-fade-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}.cr-overview-grid{grid-template-columns:minmax(0,5fr) minmax(0,4fr);gap:16px;display:grid}.cr-chart-card{border-radius:var(--lingu-radius-lg);background:var(--lingu-paper,#fff);border:1px solid var(--lingu-line-soft,var(--lingu-line));box-shadow:var(--lingu-shadow-soft);padding:18px}.cr-chart-card h3{font-family:var(--lingu-font-heading);color:var(--lingu-ink-800);align-items:center;gap:8px;margin:0 0 12px;font-size:15px;font-weight:800;display:flex}.cr-chart-card h3 svg{width:16px;height:16px;color:var(--lingu-jade-600)}.cr-chart-note{font-size:var(--lingu-text-caption);color:var(--lingu-ink-400);margin:10px 0 0}.cr-chart-box{width:100%;height:280px}.cr-chart-box--wide{height:320px}.cr-kpi-stack{flex-direction:column;gap:16px;display:flex}.cr-kpi-grid{flex:1;grid-template-columns:repeat(2,1fr);gap:12px;display:grid}.cr-kpi{border-radius:var(--lingu-radius-md);background:var(--lingu-paper,#fff);border:1px solid var(--lingu-line-soft,var(--lingu-line));box-shadow:var(--lingu-shadow-soft);flex-direction:column;justify-content:center;align-items:center;gap:4px;padding:18px 10px;display:flex}.cr-kpi span{font-family:var(--lingu-font-heading);color:var(--lingu-jade-700);font-size:26px;font-weight:900}.cr-kpi small{font-size:var(--lingu-text-caption);color:var(--lingu-ink-400)}.course-report-ai{border-radius:var(--lingu-radius-lg);background:linear-gradient(135deg, var(--lingu-gold-075,#fdf6e3), var(--lingu-gold-100));border:1px solid var(--lingu-gold-200);box-shadow:var(--lingu-shadow-gold);gap:14px;padding:18px;display:flex}.course-report-ai-icon{background:var(--lingu-gold-400);color:#fff;border-radius:50%;flex:none;place-items:center;width:40px;height:40px;display:grid}.course-report-ai-icon svg{width:20px;height:20px}.course-report-ai h2{font-family:var(--lingu-font-heading);color:var(--lingu-ink-800);margin:4px 0 6px;font-size:15px;font-weight:800}.course-report-ai p{font-size:var(--lingu-text-body);line-height:var(--lingu-text-lineheight);color:var(--lingu-ink-600);margin:0}.course-report-words{margin-top:16px}.course-report-words-grid{grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:12px;display:grid}.course-report-word{border-radius:var(--lingu-radius-md);background:var(--lingu-paper,#fff);border:1px solid var(--lingu-line-soft,var(--lingu-line));box-shadow:var(--lingu-shadow-soft);padding:14px 16px}.course-report-word strong{font-family:var(--lingu-font-heading);color:var(--lingu-ink-800);font-size:17px;font-weight:900}.course-report-word-meta{color:var(--lingu-ink-400);flex-wrap:wrap;gap:4px 12px;margin-top:8px;font-size:12px;display:flex}.course-report-word-meta b{color:var(--lingu-jade-700)}.cr-topics-toolbar{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:14px;display:flex}.cr-topics-search{border-radius:var(--lingu-radius-pill);background:var(--lingu-paper,#fff);border:1px solid var(--lingu-line-soft,var(--lingu-line));max-width:360px;box-shadow:var(--lingu-shadow-soft);flex:260px;align-items:center;gap:8px;padding:9px 14px;display:flex}.cr-topics-search svg{width:15px;height:15px;color:var(--lingu-ink-300);flex:none}.cr-topics-search input{min-width:0;font-size:var(--lingu-text-body);color:var(--lingu-ink-700);background:0 0;border:0;outline:0;flex:1}.cr-topics-count{font-size:var(--lingu-text-caption);color:var(--lingu-ink-400)}.course-report-topics{transition:opacity var(--lingu-dur-fast) var(--lingu-ease-out);grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:12px;display:grid}.course-report-topic{border-radius:var(--lingu-radius-md);background:var(--lingu-paper,#fff);border:1px solid var(--lingu-line-soft,var(--lingu-line));box-shadow:var(--lingu-shadow-soft);flex-direction:column;gap:10px;padding:16px;display:flex}.course-report-topic header{justify-content:space-between;align-items:flex-start;gap:10px;display:flex}.course-report-topic header div{min-width:0}.course-report-topic header span{font-family:var(--lingu-font-mono);color:var(--lingu-jade-600);font-size:11px;font-weight:700}.course-report-topic header h3{font-family:var(--lingu-font-heading);color:var(--lingu-ink-800);margin:2px 0 0;font-size:15px;font-weight:800;line-height:1.4}.course-report-topic header a{color:var(--lingu-jade-600);white-space:nowrap;flex:none;align-items:center;gap:4px;font-size:12px;font-weight:700;text-decoration:none;display:inline-flex}.course-report-topic header a svg{width:13px;height:13px}.course-report-topic-metrics{color:var(--lingu-ink-400);flex-wrap:wrap;gap:4px 12px;font-size:12px;display:flex}.course-report-topic-metrics b{color:var(--lingu-jade-700)}.course-report-progress progress{border-radius:var(--lingu-radius-pill);background:var(--lingu-jade-100);appearance:none;border:0;width:100%;height:6px;overflow:hidden}.course-report-progress progress::-webkit-progress-bar{border-radius:var(--lingu-radius-pill);background:var(--lingu-jade-100)}.course-report-progress progress::-webkit-progress-value{border-radius:var(--lingu-radius-pill);background:linear-gradient(90deg, var(--lingu-jade-500), var(--lingu-jade-700))}.course-report-progress 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