:root{--ink:#253c35;--muted:#7b8780;--green:#286b52;--cream:#f8f8f2;--line:#e5e9df;--orange:#d48a42}*{box-sizing:border-box}body{margin:0;background:var(--cream);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif;-webkit-font-smoothing:antialiased}button,select{font:inherit}button,a,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.4}button{transition:background .18s,transform .18s,border-color .18s}button:active:not(:disabled){transform:translateY(1px)}button:focus-visible,a:focus-visible,select:focus-visible{outline:3px solid #dfa863;outline-offset:4px}a{color:inherit;text-decoration:none}.site-shell{max-width:1440px;margin:auto}.site-header{height:100px;display:flex;align-items:center;justify-content:space-between;padding:0 6%;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:13px;font-size:21px;font-weight:750;letter-spacing:1px}.brand-icon{width:47px;height:47px;background:var(--green);color:#f2d49a;border-radius:15px;display:grid;place-items:center;transform:rotate(-5deg)}.brand small{display:block;font-size:10px;color:var(--muted);font-weight:400;letter-spacing:2px;margin-top:4px}.header-right{display:flex;gap:28px;align-items:center}.saved{display:flex;align-items:center;gap:7px;font-size:12px;color:var(--muted)}.saved>span{width:6px;height:6px;border-radius:50%;background:#6f9675}.help-button{border:1px solid #dce3d9;border-radius:9px;padding:9px 13px;display:flex;align-items:center;gap:8px;background:transparent;font-size:12px}.help-button:hover{background:#eef1e7}main{max-width:1160px;margin:0 auto;padding:41px 32px 0}.intro{display:flex;justify-content:space-between;align-items:center;margin-bottom:34px}.eyebrow{font-size:11px;letter-spacing:2px;font-weight:650;color:var(--green);display:flex;align-items:center;gap:7px}.eyebrow>span{width:5px;height:5px;border-radius:50%;background:var(--green)}h1{font-size:38px;font-weight:750;letter-spacing:1px;line-height:1.4;margin:10px 0 9px}h1>span{color:var(--green)}.intro p{font-size:13px;color:var(--muted);margin:0}.journey-note{display:flex;align-items:center;gap:14px;position:relative;padding:18px 27px;background:#f1f0e3;border:1px solid #e9e7d4;border-radius:13px;transform:rotate(2deg);font-size:13px}.journey-note small{display:block;font-size:10px;color:#929078;margin-top:6px}.note-icon{color:#b2914e}.note-spark{position:absolute;right:-9px;top:-16px;font-size:30px;color:#c9a261}.workspace{display:grid;grid-template-columns:269px minmax(0,1fr);gap:28px;align-items:start}.settings-panel{border:1px solid var(--line);border-radius:17px;background:#fffefb;padding:24px 22px}.panel-heading{display:flex;gap:9px;align-items:center;margin-bottom:26px}.section-number{font-size:10px;letter-spacing:1px;color:#80917f;border:1px solid #dfe6dc;border-radius:5px;padding:3px 5px;font-weight:600}.panel-heading h2{font-size:14px;margin:0;font-weight:650}.field-label{display:block;font-size:11px;color:#738074;margin:0 0 11px;letter-spacing:.5px}.select-wrap{position:relative;margin-bottom:23px}.select-wrap select{width:100%;appearance:none;background:#f7f8f2;border:1px solid #e4e8de;border-radius:8px;padding:12px;font-size:12px;color:var(--ink);cursor:pointer}.select-wrap svg{position:absolute;right:12px;top:12px;pointer-events:none;color:#7d8c80}.tone-picker{display:grid;grid-template-columns:repeat(4,1fr);gap:7px}.tone-picker button{display:flex;flex-direction:column;align-items:center;gap:4px;padding:7px 0 8px;border:1px solid #e5e8df;border-radius:9px;font-size:9px;color:#899086;background:#fffefb}.tone-picker button span{font-size:24px;line-height:1.3;font-family:Georgia,serif;color:#5b6a5e}.tone-picker button[aria-pressed=true]{background:#e9f0e4;border-color:#789575;color:#3d6347}.tone-picker button[aria-pressed=true] span{color:#386042}.mode-label{margin-top:27px}.mode-picker{display:flex;flex-direction:column;gap:8px}.mode-picker>button{width:100%;border:1px solid transparent;border-radius:9px;background:transparent;display:flex;gap:11px;text-align:left;align-items:center;padding:12px 9px;color:#7a877d}.mode-picker>button.active{background:#eef3e9;border-color:#dce6d4;color:var(--green)}.mode-picker>button:hover{background:#f2f5ed}.mode-picker>button>span:nth-child(2){font-size:12px;font-weight:600;flex:1}.mode-picker small{display:block;font-size:9px;font-weight:400;color:#8c9588;margin-top:5px}.radio-dot{width:14px;height:14px;border:1px solid #d6dfd1;border-radius:50%;display:grid;place-items:center}.active .radio-dot{color:white;background:var(--green);border-color:var(--green)}.auto-setting{margin-top:25px;border-top:1px dashed #e2e6dc;padding-top:21px;display:flex;justify-content:space-between;align-items:center}.auto-setting>div{display:flex;gap:8px;font-size:11px;align-items:center}.auto-setting svg{color:#80917c}.switch{width:32px;height:19px;border:0;border-radius:20px;background:#cbd4c7;padding:3px}.switch span{display:block;width:13px;height:13px;border-radius:50%;background:white;transition:transform .2s}.switch.on{background:var(--green)}.switch.on span{transform:translateX(13px)}.panel-foot{font-size:9px;color:#929b8f;line-height:1.7;margin:10px 0 0}.tiny-note{font-size:9px;color:#818d80}.practice-top{display:flex;align-items:center;justify-content:space-between;padding:2px 1px 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24px;touch-action:pan-y;overflow:hidden}.card-top{display:flex;justify-content:space-between;align-items:center}.card-tag{display:flex;gap:6px;align-items:center;font-size:10px;color:#849278}.card-tag>span{width:5px;height:5px;background:#8ba77d;border-radius:50%}.card-index{font-family:monospace;letter-spacing:2px;color:#b7bdad;font-size:10px}.pinyin-stage{text-align:center;padding:30px 0 12px;animation:arrive .3s ease-out}.pinyin{font-family:"Avenir Next","Trebuchet MS","Arial",sans-serif;font-weight:500;letter-spacing:1px;font-size:100px;line-height:1.5;color:#28583e;text-shadow:0 3px 0 #edf0e5}.tone-caption{display:flex;align-items:center;justify-content:center;gap:9px;color:#94a087;font-size:10px;margin-top:0}.tone-line{width:16px;height:1.5px;background:#a6b18c;border-radius:2px;display:inline-block}.tone-2{transform:rotate(-25deg)}.tone-3{height:7px;width:12px;border:1.5px solid #a6b18c;border-top:0;border-right:0;transform:rotate(-40deg);background:none}.tone-4{transform:rotate(25deg)}.hint-area{min-height:40px;display:flex;align-items:center;justify-content:center;margin-top:13px}.hint-trigger{background:#f6f7ef;border:1px solid #edf0e4;display:flex;gap:7px;align-items:center;color:#8b9580;border-radius:20px;padding:7px 12px;font-size:10px}.hint-trigger:hover{background:#ebf0e4}.hint-parts{display:flex;align-items:center;justify-content:center;gap:6px;font-family:"Trebuchet MS",sans-serif;font-size:25px;color:var(--green);position:relative;flex-wrap:wrap}.hint-parts b{font-size:13px;font-weight:400;color:#acb5a3;margin-right:6px}.hint-parts small{flex-basis:100%;text-align:center;font-size:9px;color:#86977b}.hint-close{display:flex;align-items:center;border:0;background:#f0f3e8;border-radius:50%;padding:3px;margin-left:8px;color:#839174}.audio-status{min-height:31px;display:flex;align-items:center;justify-content:center;gap:6px;color:#9aa28f;font-size:10px;margin-top:8px}.audio-status button{color:#a27236;background:none;border:0;display:flex;gap:5px;align-items:center;font-size:11px}.card-actions{border-top:1px dashed #e7eadd;padding-top:20px;margin-top:12px;display:grid;grid-template-columns:1fr 1fr 76px;gap:11px}.audio-button{display:flex;align-items:center;justify-content:center;gap:11px;text-align:left;border:1px solid transparent;border-radius:12px;padding:13px 10px;min-height:68px}.audio-button>span{display:flex}.audio-button>div{font-size:14px;font-weight:650;flex:1}.audio-button 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arrive{from{opacity:0;transform:translateX(12px)}to{opacity:1;transform:translateX(0)}}@keyframes pulse{to{opacity:.35}}@media(min-width:1440px){main{padding-top:55px}.intro{margin-bottom:42px}.flashcard{min-height:470px}.pinyin-stage{padding-top:40px;padding-bottom:20px}}@media(max-width:1050px){main{padding:30px 25px 0}.workspace{grid-template-columns:235px minmax(0,1fr);gap:20px}.settings-panel{padding:22px 16px}.card-actions{grid-template-columns:1fr 1fr 58px;gap:7px}.audio-button{gap:8px;padding:12px 8px}.audio-button small{font-size:8px}.audio-button>svg:last-child{display:none}.journey-note{padding:14px 18px}.bottom-note p>span{display:block;margin-top:4px}.space-hint{display:none}.card-dots{gap:5px}.nav-button{padding:10px 12px}}@media(max-width:760px){.site-header{height:78px;padding:0 22px}.brand{font-size:17px;gap:9px}.brand-icon{width:38px;height:38px;border-radius:12px}.brand 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svg{top:15px}.mode-label{display:none!important}.mode-picker{grid-column:1/-1;flex-direction:row;margin-top:17px;gap:5px}.mode-picker>button{padding:10px 6px;justify-content:center;gap:6px;border:1px solid #e7ebdf;border-radius:7px}.mode-picker small,.radio-dot{display:none}.mode-picker>button>span:nth-child(2){font-size:10px;flex:none;white-space:nowrap}.mode-picker svg{width:15px}.auto-setting{grid-column:1/-1;margin-top:16px;padding-top:13px}.auto-setting>div{font-size:10px}.panel-foot{grid-column:1/-1;font-size:9px;margin-top:6px}.tiny-note{grid-column:2;grid-row:4;font-size:8px}.practice-top{padding-bottom:11px}.practice-top>div{font-size:11px}.mode-badge{font-size:8px!important}.flashcard{min-height:414px;padding:19px 17px 20px;border-radius:19px}.pinyin-stage{padding:27px 0 12px}.pinyin{font-size:91px}.card-actions{padding-top:17px;grid-template-columns:1fr 1fr 55px;gap:7px}.audio-button{min-height:65px}.audio-button>span svg{width:21px}.audio-button>div{font-size:13px}.audio-button small{font-size:8px;white-space:nowrap}.mark-button{font-size:9px}.mark-button svg{width:20px}.card-tag{font-size:9px}.card-index{font-size:9px}.navigation{margin-top:23px}.nav-button{padding:10px;gap:5px;min-height:40px;font-size:10px}.card-dots{gap:5px}.card-dots button{width:5px;height:5px}.card-dots button.current{width:14px}.start-button{padding:11px 18px;font-size:11px}.gesture-note{font-size:8px;gap:10px;margin-top:16px}.bottom-note{margin-top:24px;padding:13px;gap:10px}.bottom-note p strong{font-size:10px}.bottom-note p>span{font-size:9px;line-height:1.6}.mini-stats{display:none}footer{padding:22px 20px;font-size:8px;gap:15px}.empty-state{min-height:372px;padding:14px}.empty-state h2{font-size:23px}.completion-actions{flex-direction:column;align-items:center}.help-modal{padding:30px 25px}.help-modal h2{font-size:23px}.card-dots button:before{inset:-9px}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}}

[hidden]{display:none!important}.audio-status.retry{cursor:pointer;color:#a27236}.help-modal{border:0;color:var(--ink)}.help-modal::backdrop{background:#233e3255;backdrop-filter:blur(5px)}.brand-icon svg{width:25px;height:25px}.card-tag + .card-index{margin-left:auto}.icp-link{margin-left:12px}.card-dots button[aria-current="step"]{background:#729365}
button.audio-status{border:0;background:transparent;width:100%;padding:0;font:inherit;font-size:10px}.audio-status:disabled{opacity:1;cursor:default}.hint-parts>span{font-size:25px;word-spacing:7px}.hint-parts small:empty{display:none}.help-modal:not([open]){display:none}.help-modal[open]{margin:auto}.radio-dot[hidden]{display:grid!important}.radio-dot[hidden] svg{visibility:hidden}.mark-button.marked svg{fill:currentColor}
.saved>span[data-ui]{width:auto;height:auto;background:none;border-radius:0}
.card-tag>span[data-ui]{width:auto;height:auto;background:transparent;border-radius:0;white-space:nowrap}