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var(--color-border-dim);gap:25px;margin-top:9px;display:flex}.card-tabs button{min-height:54px;color:var(--color-text-3);border-bottom:2px solid #0000;font-size:13px}.card-tabs button[aria-pressed=true]{color:var(--color-accent);border-bottom-color:var(--color-accent);font-weight:600}.guide-panel,.record-panel{padding-top:21px}.pron-skeleton{color:var(--color-text-3);overflow-wrap:anywhere;font-size:16px;line-height:1.75}.pron-skeleton b{color:var(--color-accent);font-weight:600}.pron-explanation{color:var(--color-text-2);margin-top:12px;font-size:14px;line-height:1.95}.pron-explanation code{color:var(--color-accent);background:#f1f5ef;border-radius:4px;padding:1px 4px;font-family:inherit}.gesture-note{background:#f6f3e9;border-left:2px solid #c8b479;border-radius:0 8px 8px 0;margin-top:19px;padding:14px 16px}.gesture-note p{color:#666244;font-size:13px;line-height:1.85}.gesture-note .field-label{color:#878063}.breath-note{color:var(--color-text-3);margin-top:16px;font-size:11px;line-height:1.7}.record-panel{gap:22px;display:grid}.teacher-recording{border:1px solid var(--color-border);border-radius:10px}.teacher-recording summary{min-height:44px;padding:12px;font-size:13px}.teacher-recording>div{padding:0 12px 14px}.personal-note label{margin-bottom:10px;font-size:14px;font-weight:500;display:block}.personal-note textarea{resize:vertical;width:100%;color:var(--color-text-2);border:1px solid var(--color-border);background:#fafbf7;border-radius:12px;padding:12px 14px;font-size:16px;line-height:1.7}.personal-note textarea::placeholder{color:#849087}.note-save{color:var(--color-text-3);justify-content:space-between;align-items:center;gap:8px;margin-top:6px;font-size:11px;display:flex}.quiet-button{min-height:44px;color:var(--color-accent);text-underline-offset:3px;flex-shrink:0;justify-content:center;align-items:center;padding:8px 10px;font-size:12px;text-decoration:underline;display:inline-flex}.inline-error{color:var(--color-warn);padding-top:8px;font-size:13px;line-height:1.8}.line-navigation{justify-content:space-between;align-items:center;gap:12px;margin-top:16px;padding:12px 0;display:flex}.line-navigation button{border-radius:11px;justify-content:center;align-items:center;gap:15px;min-height:48px;padding:12px 22px;font-size:13px;font-weight:500;display:flex}.line-navigation button>span{font-size:20px;line-height:1}.nav-previous{background:#e9ece3}.nav-next{background:var(--color-accent);color:#fff}.line-navigation>span{color:var(--color-text-2);font-variant-numeric:tabular-nums;font-size:13px}.line-navigation i{color:#7b897e;font-style:normal}.line-navigation small{text-align:center;color:var(--color-text-3);font-size:10px;display:block}.section-end{color:var(--color-text-3);text-align:center;padding-top:10px;font-size:12px;line-height:1.8}.browse-list{border:1px solid var(--color-border-dim);background:#fff;border-radius:18px;padding:14px 20px}.follow-toggle{min-height:44px;color:var(--color-text-3);align-items:center;gap:9px;font-size:12px;display:flex}.browse-list h2{color:var(--color-accent);align-items:center;gap:10px;padding:24px 0 12px;font-size:13px;display:flex}.browse-list h2 span{letter-spacing:.06em;color:var(--color-text-3);font-size:10px;font-weight:400}.browse-row{border-top:1px solid #eef0e9;border-radius:8px;align-items:center;gap:6px;padding:5px 0;scroll-margin-top:100px;display:flex}.browse-row.active{background:var(--color-accent-dim)}.browse-line{text-align:left;flex:1;align-items:flex-start;gap:12px;min-width:0;padding:12px 0;display:flex}.browse-line>span:last-child{min-width:0}.browse-number{font-variant-numeric:tabular-nums;color:var(--color-text-3);text-align:center;flex-shrink:0;width:22px;padding-top:6px;font-size:10px}.browse-number small{color:var(--color-success);display:block}.browse-lyric{font-family:Georgia,serif;font-size:20px;line-height:1.4;display:block}.browse-ipa{color:#537d70;overflow-wrap:anywhere;margin-top:6px;font-family:Arial,sans-serif;font-size:13px;line-height:1.7;display:block}.practice-reference{min-width:0;padding-top:45px}.practice-reference h2{margin-top:8px;font-size:20px;font-weight:500}.practice-reference>.muted{margin:8px 0 21px;font-size:12px}.reference-panel{border-top:1px solid #dce2d5}.reference-panel:last-child{border-bottom:1px solid #dce2d5}.reference-panel summary{justify-content:space-between;align-items:center;gap:12px;min-height:55px;padding:12px 0;font-size:13px;line-height:1.5;list-style:none;display:flex}.reference-panel summary span{color:#81917a;font-size:20px;font-weight:300}.reference-panel[open] summary span{transform:rotate(45deg)}.reference-body{color:var(--color-text-2);overflow-wrap:anywhere;padding:0 0 20px;font-size:12px;line-height:1.9}.reference-body>p+p{margin-top:12px}.reference-body ol{padding-left:19px;list-style:decimal}.reference-body li+li{margin-top:10px}.error-cards>div,.contrast-cards>div{padding:12px 0}.error-cards>div+div,.contrast-cards>div+div{border-top:1px dashed #d7dfd0}.error-cards h3{color:var(--color-accent);margin-bottom:7px;font-size:13px;font-weight:600}.error-cards p+p{margin-top:6px}.label{color:#839179;margin-right:8px;font-size:10px;display:inline-block}.contrast-cards strong{color:var(--color-accent)}.contrast-cards p{margin-top:6px}.app-footer{color:#748170;flex-wrap:wrap;justify-content:space-between;gap:10px 18px;padding-top:50px;padding-bottom:35px;font-size:11px;display:flex}.app-footer>span:first-child{letter-spacing:.08em}.app-footer small{opacity:.8;width:100%;font-size:10px;display:block}@media (max-width:900px){.practice-layout{grid-template-columns:minmax(0,1fr);gap:28px}.practice-reference{padding:18px 4px 0}.practice-reference>.muted{margin-bottom:12px}.reference-body,.reference-panel summary{font-size:14px}.song-heading h1{font-size:38px}}@media (max-width:600px){.page-width{width:calc(100% - 32px)}.header-inner{height:65px}.brand{gap:9px}.brand-icon{width:34px;height:34px;font-size:22px}.brand strong{font-size:13px}.brand div>span{font-size:8px}.song-library summary{gap:7px;font-size:12px}.song-library nav{top:calc(100% + 10px)}.song-heading{padding:26px 0 20px;display:block}.song-heading .eyebrow{letter-spacing:.14em;font-size:8px}.song-heading h1{max-width:340px;margin:8px 0 11px;font-size:34px}.song-artist{gap:7px 12px;font-size:11px}.song-artist span{padding-left:12px}.song-progress{text-align:left;align-items:center;gap:12px;width:100%;margin-top:17px;font-size:10px;display:flex}.song-progress b{font-size:13px;font-weight:600}.song-progress>div{width:80px;height:3px;margin:0}.song-progress small{margin-left:auto;font-size:9px}.transport{border-radius:14px;padding:12px 14px 6px}.transport-main{gap:10px}.round-play{width:44px;height:44px}.transport-title strong{font-size:12px}.transport-title button{font-size:10px}.speed-control{gap:0}.speed-control>span{display:none}.speed-control select{width:65px;padding:6px;font-size:16px}.loop-toggle{flex-direction:column;gap:4px;min-width:44px;padding:5px 6px;font-size:9px}.seek-row{gap:9px;font-size:9px}.workspace{margin-top:20px;scroll-margin-top:82px}.workspace-toolbar{gap:10px;margin-bottom:12px}.view-switch{border-radius:10px;flex-shrink:0;gap:0;padding:3px}.view-switch button{min-height:40px;padding:8px 13px;font-size:12px}.section-picker select{width:122px;min-height:46px;padding:8px 5px;font-size:16px}.view-options{gap:7px;margin-bottom:10px;font-size:10px}.view-options label{gap:5px;min-height:36px}.view-options input{width:14px;height:14px}.practice-card{border-radius:17px;padding:17px 18px 20px}.card-meta{gap:6px;font-size:10px}.card-meta b{font-size:20px}.card-meta i{margin:0 6px}.practiced-button{gap:4px;padding:8px;font-size:10px}.lyric-instruction{margin-top:18px;font-size:10px}.lyric-word{min-height:44px;padding:2px 5px;font-size:28px}.lyric-words{gap:0 1px;margin-left:-5px}.ipa-line{margin-top:10px;font-size:16px;line-height:1.7}.original-line-controls{gap:10px;margin-top:18px}.primary-button{padding-inline:13px;font-size:12px}.original-line-controls>span{font-size:10px}.phrase-section{margin-top:18px}.phrase-chips{gap:6px}.phrase-chips button{padding:8px 10px;font-size:12px}.model-audio{margin:21px -18px 0;padding:17px 18px}.practice-audio-controls{gap:7px}.practice-audio-controls select{border-radius:9px;padding:8px 6px;font-size:16px}.practice-audio-controls .practice-audio-play{padding-inline:12px;font-size:12px}.practice-audio-header .text-xs{font-size:10px}.practice-audio-header .text-sm{font-size:12px}.practice-audio-status{font-size:11px;line-height:1.7}.audio-caption{font-size:9px;line-height:1.7}.card-tabs{gap:24px}.card-tabs button{min-height:50px;font-size:12px}.guide-panel,.record-panel{padding-top:17px}.pron-skeleton{font-size:15px}.pron-explanation{font-size:14px;line-height:1.95}.gesture-note{margin-top:16px;padding:12px}.gesture-note p{font-size:12px;line-height:1.9}.breath-note{font-size:10px}.note-save{align-items:flex-start;font-size:10px}.note-save>span{padding-top:12px}.line-navigation{z-index:20;padding:12px 16px max(12px, env(safe-area-inset-bottom));-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);background:#f5f3edf5;border-top:1px solid #e4e7dd;margin:14px -16px 0;position:sticky;bottom:0}.line-navigation button{gap:12px;min-height:48px;padding:10px 20px;font-size:12px}.line-navigation>span{font-size:12px}.browse-list{border-radius:15px;padding:12px}.browse-line{gap:8px}.browse-number{width:19px}.browse-lyric{font-size:20px}.browse-ipa{font-size:13px}.browse-row{scroll-margin-top:82px}.follow-toggle{font-size:11px}.practice-reference{padding-top:8px}.app-footer{justify-content:flex-start;padding-block:35px 25px;font-size:10px}.app-footer small{display:none}}@media (max-width:360px){.page-width{width:calc(100% - 24px)}.line-navigation{margin-inline:-12px;padding-inline:12px}.view-switch button{padding-inline:10px}.section-picker select{width:110px}.practice-card{padding-inline:15px}.model-audio{margin-inline:-15px;padding-inline:15px}.song-progress small{display:none}.practice-audio-controls .practice-audio-select{flex-basis:auto}.practice-audio-controls>select[aria-label=美式示范声音]{max-width:132px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition:none!important;animation:none!important}}@property --tw-space-y-reverse{syntax:"*";inherits:false;initial-value:0}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-font-weight{syntax:"*";inherits:false}@property --tw-ordinal{syntax:"*";inherits:false}@property --tw-slashed-zero{syntax:"*";inherits:false}@property --tw-numeric-figure{syntax:"*";inherits:false}@property --tw-numeric-spacing{syntax:"*";inherits:false}@property --tw-numeric-fraction{syntax:"*";inherits:false}@keyframes spin{to{transform:rotate(360deg)}}