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celebration-pop{0%{opacity:0;transform:translate(0)scale(.6)}20%{opacity:1;transform:translate(var(--x),var(--y)) scale(1)}to{opacity:0;transform:translate(calc(var(--x) * 1.15),calc(var(--y) * 1.15)) scale(.85)}}.hide-pinyin .ex-py,.hide-pinyin .fc-choice-hanzi .py,.hide-pinyin .fc-prompt-pinyin,.hide-pinyin .gram-ex-py,.hide-pinyin .sb-prompt-py,.hide-pinyin .stroke-char-pinyin,.hide-pinyin .vocab-pinyin,.hide-pinyin [data-pinyin],.hide-pinyin rt{display:none!important}body{font-family:var(--font-dm-sans),sans-serif;background:var(--bg);color:var(--ink);font-size:17px;line-height:1.6}.app,body{min-height:100vh}.app{grid-template-columns:360px minmax(0,1fr);display:grid}.sidebar{background:var(--ink);flex-direction:column;height:100vh;padding:2rem 0;display:flex;position:sticky;top:0;overflow-y:auto}.sidebar-logo{border-bottom:1px solid #2c2a27;padding:0 1.5rem 2rem}.sidebar-logo 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var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:16px;transition:box-shadow .2s;overflow:hidden}.vocab-card:hover{box-shadow:0 2px 8px #00000014,0 8px 24px #0000000f}.vocab-main{display:block}.vocab-left{background:var(--bg);border-right:1px solid var(--border);flex-direction:column;justify-content:center;align-items:center;gap:12px;padding:20px 12px;display:flex}.hanzi-display{font-family:var(--font-noto-sc),serif;color:var(--ink);text-align:center;font-size:52px;line-height:1}.audio-controls{gap:6px}.audio-controls,.play-btn{align-items:center;display:flex}.play-btn{border:1px solid var(--border2);background:var(--card);cursor:pointer;width:32px;height:32px;color:var(--ink2);border-radius:50%;justify-content:center;transition:all .15s}.play-btn:hover{border-color:var(--red-mid)}.play-btn.playing,.play-btn:hover{background:var(--red-light);color:var(--red)}.play-btn.playing{border-color:var(--red)}.play-btn svg{width:13px;height:13px}.slow-btn{border:1px solid var(--border);cursor:pointer;width:26px;height:26px;color:var(--ink3);letter-spacing:-.5px;background:0 0;border-radius:50%;justify-content:center;align-items:center;font-size:11px;font-weight:600;transition:all .15s;display:flex}.slow-btn:hover{background:var(--bg);color:var(--ink2)}.vocab-right{padding:18px 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solid var(--border2);cursor:pointer;color:var(--ink2);font-size:14px;font-family:var(--font-dm-sans),sans-serif;background:0 0;border-radius:20px;padding:4px 12px;font-weight:400;transition:all .15s}.action-btn:hover{background:var(--bg);color:var(--ink)}.action-btn.open{background:var(--green-light);border-color:var(--green-mid);color:var(--green)}.action-btn.ask{color:var(--purple);border-color:#c4bae8}.action-btn.ask:hover{background:var(--purple-light)}.hanzi-panel{border-top:1px solid var(--border);background:#fdfcfa;padding:16px 20px;animation:slideDown .2s;display:none}.hanzi-panel.open{display:block}@keyframes slideDown{0%{opacity:0;transform:translateY(-6px)}to{opacity:1;transform:translateY(0)}}.hanzi-grid{grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px;margin-bottom:12px;display:grid}.char-box{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:12px 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14px}.tip-label{text-transform:uppercase;letter-spacing:.1em;color:var(--green);margin-bottom:4px;font-size:12px;font-weight:500}.tip-val{color:var(--green);font-size:15px;line-height:1.6}.tip-val b{font-family:var(--font-noto-sc),serif;font-size:17px}ruby{vertical-align:bottom;flex-direction:column-reverse;align-items:center;margin:0 1px;line-height:1.2;display:inline-flex}rt{font-family:var(--font-crimson),serif;color:var(--purple);margin-bottom:1px;font-size:13px;font-style:italic;line-height:1}.gram-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:16px;padding:20px 22px}.gram-num{background:var(--red);color:#fff;text-align:center;border-radius:50%;flex-shrink:0;width:22px;height:22px;margin-right:8px;font-size:13px;font-weight:500;line-height:22px;display:inline-block}.gram-title{color:var(--ink);align-items:center;font-weight:500;display:flex}.gram-pattern,.gram-title{margin-bottom:10px;font-size:18px}.gram-pattern{font-family:var(--font-crimson),serif;color:var(--green);background:var(--green-light);border:1px solid var(--green-mid);border-radius:var(--radius-sm);padding:8px 14px;display:inline-block}.gram-note{color:var(--ink2);border-left:3px solid var(--border2);margin-bottom:14px;padding-left:12px;font-size:15px;line-height:1.7}.gram-examples{flex-direction:column;gap:8px;margin-bottom:10px;display:flex}.gram-ex{border:1px solid var(--border);border-radius:var(--radius-sm);background:#fdfcfa;grid-template-columns:1fr auto;align-items:start;gap:8px;padding:10px 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#0000008c}}.listen-p3-num{font-family:var(--font-dm-sans),sans-serif;color:var(--ink2);text-align:center;padding-top:4px;font-weight:600}.listen-p3-opts{grid-template-columns:repeat(3,1fr);gap:8px;display:grid}.listen-p3-opt{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);cursor:pointer;text-align:left;gap:10px;padding:10px 12px;transition:all .12s;display:flex}.listen-p3-opt:hover{border-color:var(--purple);background:var(--purple-light)}.listen-p3-opt.picked{border-color:var(--purple);background:var(--purple);color:var(--card)}.listen-p3-opt.picked .listen-p3-py,.listen-p3-opt.picked .listen-p3-vn{color:#ffffffd1}.listen-p3-letter{font-family:var(--font-dm-sans),sans-serif;color:var(--purple);flex-shrink:0;font-size:14px;font-weight:700}.listen-p3-opt.picked .listen-p3-letter{color:var(--card)}.listen-p3-text{flex-direction:column;gap:2px;min-width:0;display:flex}.listen-p3-py{color:var(--ink3);font-size:11px;font-style:italic}.listen-p3-zh{font-family:var(--font-noto-sc),serif;font-size:16px}.listen-p3-vn{color:var(--ink3);font-size:11px}.listen-footer{border-top:1px solid var(--border);justify-content:space-between;align-items:center;padding-top:14px;display:flex}.listen-count{color:var(--ink2);font-size:13px}.listen-submit-btn{background:var(--ink);color:var(--card);border-radius:var(--radius-sm);font-family:var(--font-dm-sans),sans-serif;cursor:pointer;border:none;padding:10px 20px;font-size:14px;font-weight:600;transition:background .15s,transform .12s}.listen-submit-btn:hover:not(:disabled){background:var(--purple)}.listen-submit-btn:active:not(:disabled){transform:scale(.98)}.listen-submit-btn:disabled{opacity:.4;cursor:not-allowed}.listen-footer-actions{align-items:center;gap:8px;display:flex}.listen-clear-btn{border:1px solid var(--border);background:var(--card);color:var(--ink2);border-radius:var(--radius-sm);font-family:var(--font-dm-sans),sans-serif;cursor:pointer;padding:10px 16px;font-size:13px;font-weight:500;transition:all .12s}.listen-clear-btn:hover:not(:disabled){background:var(--red-light);border-color:var(--red);color:var(--red)}.listen-clear-btn:disabled{opacity:.4;cursor:not-allowed}.listen-summary-backdrop{z-index:100;background:#00000080;justify-content:center;align-items:center;padding:20px;display:flex;position:fixed;inset:0}.listen-summary{background:var(--card);border-radius:var(--radius);flex-direction:column;width:100%;max-width:640px;max-height:85vh;display:flex;box-shadow:0 20px 60px #0000004d}.listen-summary-head{border-bottom:1px solid var(--border);justify-content:space-between;align-items:center;padding:18px 24px;display:flex}.listen-summary-title{font-family:var(--font-dm-sans),sans-serif;font-size:18px;font-weight:600}.listen-summary-close{color:var(--ink2);cursor:pointer;background:0 0;border:none;border-radius:4px;padding:4px 8px;font-size:18px}.listen-summary-close:hover{background:var(--bg)}.listen-summary-head-actions{align-items:center;gap:8px;display:flex}.listen-summary-download{background:var(--bg);border:1px solid var(--border);color:var(--ink);cursor:pointer;border-radius:6px;padding:6px 12px;font-size:13px;font-weight:600;transition:background .15s,border-color .15s}.listen-summary-download:hover:not(:disabled){background:var(--border);border-color:var(--ink2)}.listen-summary-download:disabled{opacity:.6;cursor:not-allowed}@media (max-width:520px){.listen-summary-head{gap:8px;padding:14px 16px}.listen-summary-title{flex:1;min-width:0;font-size:16px}.listen-summary-head-actions{gap:6px}.listen-summary-download{white-space:nowrap;padding:6px 8px;font-size:12px}.listen-summary-close{padding:4px 6px}}.listen-summary-body{padding:18px 24px;overflow-y:auto}.listen-summary-note{color:var(--ink2);margin:0 0 16px;font-size:13px;font-style:italic}.listen-summary-section{margin-bottom:18px}.listen-summary-label{text-transform:uppercase;letter-spacing:.08em;color:var(--purple);margin-bottom:8px;font-size:12px;font-weight:600}.listen-summary-list{flex-direction:column;gap:4px;margin:0;padding:0;list-style:none;display:flex}.listen-summary-list li{background:var(--bg);border-radius:4px;align-items:center;gap:8px;padding:6px 10px;font-size:13px;display:flex}.listen-summary-item{flex-direction:column;gap:4px;display:flex;align-items:stretch!important}.listen-summary-line{flex-wrap:wrap;align-items:center;gap:8px;display:flex}.listen-summary-note-text{color:var(--ink2);background:var(--purple-light);border-left:2px solid var(--purple);white-space:pre-wrap;word-break:break-word;border-radius:3px;padding:4px 8px;font-size:12px;font-style:italic}.listen-summary-note-text.masked{-webkit-text-security:disc}@supports not (-webkit-text-security:disc){.listen-summary-note-text.masked{color:#0000;text-shadow:0 0 6px #0000008c}}.listen-summary-idx{color:var(--ink2);min-width:28px;font-weight:600}.listen-summary-pick{min-width:32px;font-weight:600}.listen-summary-img{font-size:22px}.listen-summary-hint{color:var(--ink3);font-size:12px}.listen-summary-opt{color:var(--ink)}.listen-summary-opt b{font-family:var(--font-noto-sc),serif;font-weight:400}.rd-items{flex-direction:column;gap:12px;display:flex}.rd-item{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);grid-template-columns:36px 1fr;gap:12px;padding:12px 14px;display:grid}.rd-num{font-family:var(--font-dm-sans),sans-serif;color:var(--ink2);text-align:center;padding-top:4px;font-weight:600}.rd-content{gap:10px;min-width:0}.rd-content,.rd-sentence{flex-direction:column;display:flex}.rd-sentence{gap:2px}.rd-py{color:var(--ink3);font-size:12px;font-style:italic}.rd-zh{font-family:var(--font-noto-sc),serif;color:var(--ink);font-size:17px;line-height:1.5}.rd-vn{color:var(--ink2);font-size:13px;font-style:italic}.rd-picks{flex-wrap:wrap;gap:6px;display:flex}.rd-part1{flex-direction:column;gap:16px;display:flex}.rd-part1 .listen-p2-grid{margin-bottom:0}.rd-part2{gap:16px}.rd-part2,.rd-part3{flex-direction:column;display:flex}.rd-part3{gap:12px}.rd-part4{flex-direction:column;gap:16px;display:flex}.rd-options-row{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);flex-wrap:wrap;gap:8px;padding:12px;display:flex}.rd-option-chip{background:var(--card);border:1px solid var(--border);border-radius:999px;align-items:baseline;gap:6px;padding:6px 12px;display:inline-flex}.rd-option-letter{font-family:var(--font-dm-sans),sans-serif;color:var(--purple);font-size:13px;font-weight:700}.rd-option-text{align-items:baseline;gap:6px;display:inline-flex}.rd-py-inline{color:var(--ink3);font-size:11px;font-style:italic}.rd-zh-inline{font-family:var(--font-noto-sc),serif;font-size:15px}.rd-options-stack{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);flex-direction:column;gap:8px;padding:14px;display:flex}.rd-option-line{grid-template-columns:24px 1fr;align-items:start;gap:10px;display:grid}.rd-claim{background:var(--card);border-left:3px solid var(--purple);border-radius:4px;align-items:flex-start;gap:8px;padding:8px 10px;display:flex}.rd-claim-mark{color:var(--purple);flex-shrink:0;font-weight:700}.rd-summary-zh{font-family:var(--font-noto-sc),serif;color:var(--ink)}.listen-tips{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px 18px}.listen-tips-label{text-transform:uppercase;letter-spacing:.1em;color:var(--ink3);margin-bottom:8px;font-size:12px;font-weight:500}.listen-tips ul{color:var(--ink2);flex-direction:column;gap:4px;padding-left:20px;font-size:14px;list-style:outside;display:flex}.listen-download{color:var(--purple);border:1px solid var(--border);border-radius:var(--radius-sm);align-self:flex-start;padding:6px 12px;font-size:13px;text-decoration:none;transition:all .15s}.listen-download:hover{background:var(--purple-light);border-color:var(--purple)}.assistant-card{z-index:50;width:248px;font-family:var(--font-dm-sans),sans-serif;background:linear-gradient(#fffdf9,#f7f3ea);border:1px solid #8268432e;border-radius:18px;flex-direction:column;gap:10px;padding:14px 16px 16px;display:flex;position:fixed;bottom:20px;right:20px;box-shadow:0 12px 32px #00000024,0 2px 6px #0000000d}.assistant-head{justify-content:space-between;align-items:flex-start;gap:10px;display:flex}.assistant-eyebrow{letter-spacing:.08em;text-transform:uppercase;color:#8a6d47;font-size:11px;font-weight:700}.assistant-head-title{color:var(--ink);margin-top:2px;font-size:16px;font-weight:600}.assistant-icon-btn{width:28px;height:28px;color:var(--ink2);cursor:pointer;background:#fff9;border:none;border-radius:8px;padding:0;font-size:16px;line-height:1}.assistant-icon-btn:hover{color:var(--ink);background:#fff}.assistant-visual{justify-content:center;margin-top:2px;display:flex}.assistant-img{background:#fff;border-radius:50%;padding:4px;box-shadow:0 8px 20px #755f4024}.assistant-status{letter-spacing:.08em;text-transform:uppercase;color:#3b8a5c;font-size:12px;font-weight:700}.assistant-title{color:var(--ink);font-size:18px;font-weight:600;line-height:1.25}.assistant-detail{color:var(--ink2);font-size:13px;line-height:1.5}.assistant-meta{color:var(--ink3);font-size:12px}.assistant-actions{flex-direction:column;gap:8px;width:100%;display:flex}.assistant-btn-ghost,.assistant-btn-primary,.assistant-btn-secondary{cursor:pointer;border-radius:12px;font-family:inherit;transition:transform .1s,box-shadow .15s,border-color .15s,background .15s}.assistant-btn-primary{background:var(--ink);color:#fff;border:none;width:100%;padding:10px 12px;font-size:13px;font-weight:600;box-shadow:0 8px 18px #3d2c1829}.assistant-btn-primary:hover{background:var(--purple);transform:translateY(-1px)}.assistant-quick-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px;display:grid}.assistant-btn-ghost{color:var(--ink2);background:#ffffffb8;border:1px solid #82684333;padding:9px 10px;font-size:12px;font-weight:600}.assistant-btn-ghost:hover{color:#7a4d20;background:#fff;border-color:#b07d4f}.assistant-btn-secondary{width:100%;color:var(--ink2);background:#ffffffb8;border:1px solid #82684333;padding:9px 10px;font-size:12px;font-weight:600}.assistant-btn-secondary:hover{color:#9c3f3f;background:#fff;border-color:#c67070}.assistant-roadmap{gap:8px;display:grid}.assistant-step{color:var(--ink2);background:#ffffff9e;border:1px solid #8268431f;border-radius:12px;align-items:center;gap:10px;padding:8px 10px;font-size:13px;display:flex}.assistant-step-index{color:#7a4d20;background:#e7d9c3;border-radius:999px;flex-shrink:0;justify-content:center;width:22px;height:22px;font-size:12px;font-weight:700}.assistant-dock,.assistant-step-index{align-items:center;display:inline-flex}.assistant-dock{cursor:pointer;z-index:50;font-family:var(--font-dm-sans),sans-serif;background:#fffffff0;border:1px solid #8268432e;border-radius:999px;gap:10px;padding:7px 14px 7px 7px;transition:transform .12s,box-shadow .15s;position:fixed;bottom:20px;right:20px;box-shadow:0 8px 20px #00000021}.assistant-dock:hover{transform:translateY(-1px);box-shadow:0 12px 24px #00000029}.assistant-dock-img{background:#fff;border-radius:50%;box-shadow:0 2px 8px #00000014}.assistant-dock-copy{flex-direction:column;align-items:flex-start;min-width:0;display:flex}.assistant-dock-title{color:var(--ink);font-size:13px;font-weight:700;line-height:1.2}.assistant-dock-subtitle{color:var(--ink2);font-size:12px;line-height:1.2}@media (max-width:640px){.assistant-card{width:min(248px,100vw - 24px)}.assistant-card,.assistant-dock{bottom:12px;right:12px}}@property --tw-rotate-x{syntax:"*";inherits:false}@property --tw-rotate-y{syntax:"*";inherits:false}@property --tw-rotate-z{syntax:"*";inherits:false}@property --tw-skew-x{syntax:"*";inherits:false}@property --tw-skew-y{syntax:"*";inherits:false}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}@property --tw-outline-style{syntax:"*";inherits:false;initial-value:solid}