:root{--ps-brand: #f15a65;--ps-brand-dark: #d8434e;--ps-brand-light: #fbf3f4;--ps-brand-border: #f6c7cb;--ps-ink: #1f2330;--ps-ink-soft: #33384a;--ps-muted: #6b7280;--ps-line: #e7e9ee;--ps-line-strong: #d1d5db;--ps-bg: #fbf3f4;--ps-surface: #ffffff;--ps-rail-width: 220px;--ps-font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;--ps-font-pinyin: sans-serif;--ps-space-xs: 4px;--ps-space-sm: 8px;--ps-space-md: 12px;--ps-space-lg: 16px;--ps-space-xl: 20px;--ps-space-2xl: 24px;--ps-space-3xl: 32px;--ps-space-4xl: 48px;--ps-radius-sm: 6px;--ps-radius-md: 8px;--ps-radius-card: 12px;--ps-radius-xl: 16px;--ps-radius-pill: 999px;--ps-shadow-sm: 0 1px 3px rgba(18, 25, 33, .06);--ps-shadow-card: 0 1px 5px rgba(18, 25, 33, .1);--ps-shadow-hover: 0 10px 50px rgba(18, 25, 33, .1);--ps-shadow-btn: 0 8px 24px rgba(241, 90, 101, .28);--ps-bp-tablet: 900px;--ps-bp-mobile: 600px;--ps-bp-small: 480px;--ps-group-labial: #f6a9af;--ps-group-alveolar: #93c5fd;--ps-group-velar: #86efac;--ps-group-palatal: #fde68a;--ps-group-retroflex: #c4b5fd;--ps-group-dental: #67e8f9;--ps-group-simple: #f9a8d4;--ps-group-compound: #a5b4fc;--ps-group-nasal: #86efac;--ps-group-special: #fbbf24}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px}body{font-family:var(--ps-font-stack);background:var(--ps-bg);color:var(--ps-ink);line-height:1.6}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}:focus-visible{outline:2px solid var(--ps-brand);outline-offset:2px}:focus:not(:focus-visible){outline:none}.ps-studio{width:100%;display:flex;flex-direction:column;background:var(--ps-bg)}.ps-body{display:flex;background:var(--ps-bg);width:100%;align-items:flex-start}.ps-rail{width:var(--ps-rail-width);min-width:var(--ps-rail-width);border-right:1px solid var(--ps-line);background:var(--ps-surface);display:flex;flex-direction:column;z-index:10;flex:0 0 var(--ps-rail-width);position:sticky;top:var(--ps-rail-sticky-top,0px);align-self:flex-start;height:calc(100vh - var(--ps-rail-sticky-top,0px));overflow-y:auto;overscroll-behavior:contain;transition:width .25s ease,min-width .25s ease,flex-basis .25s ease}.ps-rail.is-collapsed{width:36px;min-width:36px;flex-basis:36px;overflow:visible}.ps-rail-toggle{position:absolute;top:12px;right:12px;width:26px;height:26px;border-radius:50%;border:1px solid var(--ps-line);background:var(--ps-surface);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:.7rem;color:var(--ps-muted);transition:all .2s;padding:0;line-height:1;z-index:11}.ps-rail-toggle:hover{color:var(--ps-brand);border-color:var(--ps-brand);background:var(--ps-brand-light)}.ps-rail.is-collapsed .ps-rail__header h2,.ps-rail.is-collapsed .ps-rail__header p,.ps-rail.is-collapsed .ps-rail__search,.ps-rail.is-collapsed .ps-rail-reset,.ps-rail.is-collapsed .ps-tree{display:none}.ps-rail.is-collapsed .ps-rail__header{height:100%;padding:12px 8px;display:flex;align-items:flex-start;justify-content:center}.ps-rail.is-collapsed .ps-rail-toggle{position:static;transform:translate(0)}.ps-rail__header{padding:var(--ps-space-lg);border-bottom:1px solid var(--ps-line);position:relative}.ps-rail__header h2{font-weight:700;font-size:1.1rem;color:var(--ps-ink);margin-bottom:var(--ps-space-xs)}.ps-rail__header p{font-size:.85rem;color:var(--ps-muted);margin-bottom:var(--ps-space-sm)}.ps-rail-reset{display:block;width:100%;margin-top:var(--ps-space-xs);padding:var(--ps-space-sm) var(--ps-space-md);border-radius:var(--ps-radius-pill);border:1px solid var(--ps-line);background:var(--ps-surface);color:var(--ps-ink-soft);font-family:var(--ps-font-stack);font-size:.75rem;font-weight:600;cursor:pointer;transition:background .2s,border-color .2s,color .2s;-webkit-appearance:none;-moz-appearance:none;appearance:none}.ps-rail-reset:hover,.ps-rail-reset:focus-visible{background:var(--ps-brand)!important;background-color:var(--ps-brand)!important;border-color:var(--ps-brand)!important;color:#fff!important}.ps-stage{flex:1 1 0%;min-width:0;width:100%;max-width:100%;padding:var(--ps-space-xl) var(--ps-space-3xl) var(--ps-space-3xl);background:var(--ps-bg);position:relative;z-index:1}.ps-rail__search{display:none;padding:var(--ps-space-md) var(--ps-space-lg);border-bottom:1px solid var(--ps-line)}.ps-rail__search input{width:100%;padding:.4em .5em;border-radius:0;border:0;border-bottom:1px solid var(--ps-line);font-family:var(--ps-font-stack);font-size:.9rem;background:transparent;color:var(--ps-ink);outline:none;transition:border-color .15s}.ps-rail__search input:focus{border-bottom-color:var(--ps-brand)}.ps-tree{padding:var(--ps-space-sm);flex:1;overflow:visible}.ps-tree__branch{margin-bottom:2px}.ps-toggle{display:flex;align-items:center;gap:var(--ps-space-sm);padding:var(--ps-space-sm) var(--ps-space-md);border-radius:var(--ps-radius-md);cursor:pointer;transition:background .12s;-webkit-user-select:none;user-select:none}.ps-toggle:hover{background:var(--ps-bg)}.ps-toggle.is-active{background:var(--ps-brand-light)}.ps-toggle__arrow{width:16px;font-size:.7rem;color:var(--ps-muted);transition:transform .15s;text-align:center;flex-shrink:0}.ps-toggle__arrow.is-open{transform:rotate(90deg)}.ps-toggle__icon{width:26px;height:26px;border-radius:var(--ps-radius-sm);display:flex;align-items:center;justify-content:center;font-size:.7rem;font-weight:700;color:#fff;flex-shrink:0}.ps-toggle__icon--init{background:var(--ps-brand)}.ps-toggle__icon--final{background:var(--ps-brand-dark)}.ps-toggle__icon--tones{background:#7c3aed}.ps-toggle__icon--chart{background:#3b82f6}.ps-toggle__label{font-weight:600;font-size:.95rem;color:var(--ps-ink);flex:1;min-width:0}.ps-toggle__count{font-size:.7rem;color:var(--ps-muted)}.ps-tree__children{overflow:hidden;max-height:0;transition:max-height .25s ease}.ps-tree__children.is-open{max-height:4000px}.ps-item{display:flex;align-items:center;gap:var(--ps-space-sm);padding:var(--ps-space-xs) var(--ps-space-md);padding-left:48px;border-radius:var(--ps-radius-md);cursor:pointer;transition:all .1s}.ps-item:hover{background:var(--ps-bg)}.ps-item.is-selected{background:var(--ps-brand-light)}.ps-item.is-selected .ps-item__letter{color:var(--ps-brand);font-weight:700}.ps-item__letter{font-family:var(--ps-font-pinyin);font-weight:600;font-size:.95rem;width:auto;min-width:32px;flex-shrink:0;white-space:nowrap;text-align:center;color:var(--ps-ink)}.ps-item__desc{font-size:.72rem;color:var(--ps-muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.ps-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(140px,180px));gap:12px;align-items:start;justify-content:start}.ps-card{background:var(--ps-surface);border:none;border-radius:var(--ps-radius-card);box-shadow:var(--ps-shadow-card);overflow:hidden;transition:box-shadow .6s cubic-bezier(.2,1,.2,1),transform .6s cubic-bezier(.2,1,.2,1);cursor:pointer;position:relative;width:100%;max-width:180px}.ps-card:hover{box-shadow:var(--ps-shadow-hover);transform:perspective(400px) scale(1.02)}.ps-card.is-expanded{box-shadow:var(--ps-shadow-hover)}.ps-card__head{padding:16px 12px;display:flex;flex-direction:column;align-items:center;gap:2px}.ps-card__pinyin{font-family:var(--ps-font-pinyin);font-size:1.3rem;font-weight:700;line-height:1.3;color:var(--ps-brand)}.ps-card--labial{border-color:var(--ps-group-labial)}.ps-card--alveolar{border-color:var(--ps-group-alveolar)}.ps-card--velar{border-color:var(--ps-group-velar)}.ps-card--palatal{border-color:var(--ps-group-palatal)}.ps-card--retroflex{border-color:var(--ps-group-retroflex)}.ps-card--dental{border-color:var(--ps-group-dental)}.ps-card--simple{border-color:var(--ps-group-simple)}.ps-card--compound{border-color:var(--ps-group-compound)}.ps-card--nasal{border-color:var(--ps-group-nasal)}.ps-card--special{border-color:var(--ps-group-special)}.ps-card--tone{border:none;border-radius:var(--ps-radius-card);width:100%;max-width:180px;min-height:200px;box-shadow:var(--ps-shadow-card);background:var(--ps-surface);transition:box-shadow .6s cubic-bezier(.2,1,.2,1),transform .6s cubic-bezier(.2,1,.2,1)}.ps-card--tone:hover{box-shadow:var(--ps-shadow-hover);transform:perspective(400px) scale(1.02)}.ps-expand{max-height:0;overflow:hidden;transition:max-height .3s linear,opacity 0s .3s;opacity:0;background:var(--ps-bg)}.ps-card.is-expanded .ps-expand{max-height:400px;opacity:1;transition:max-height .55s cubic-bezier(.4,0,.2,1),opacity .45s ease-out}.ps-expand__inner{padding:10px 10px 12px}.ps-expand__group{margin-bottom:12px}.ps-expand__group-label{font-size:.72rem;font-weight:600;color:var(--ps-muted);margin-bottom:4px}.ps-card--sub{border:none;border-radius:var(--ps-radius-md);box-shadow:var(--ps-shadow-sm);background:var(--ps-surface)}.ps-tip{background:var(--ps-brand-light);border-left:5px solid var(--ps-brand-dark);padding:8px 12px;border-radius:var(--ps-radius-md);font-size:.75rem;color:var(--ps-ink-soft);margin-bottom:8px;line-height:1.45;height:calc(3 * .75rem * 1.45 + 1rem);overflow:hidden}.ps-tone-row{display:flex;align-items:center;gap:5px;background:var(--ps-surface);border:1px solid var(--ps-line);border-radius:var(--ps-radius-sm);padding:5px 8px;margin-bottom:4px;cursor:pointer;transition:background .15s,border-color .15s,transform .15s}.ps-tone-row:hover{background:var(--ps-brand-light);border-color:var(--ps-brand);transform:translate(2px)}.ps-tone-row__word{font-family:var(--ps-font-pinyin);font-size:.82rem;font-weight:700;min-width:40px;text-align:center;flex-shrink:0}.ps-tone-row__name{font-size:.6rem;color:var(--ps-muted);flex:1;min-width:0}.ps-tone-row--neutral{border-style:dashed}.ps-tone-row--no-audio{cursor:default;opacity:.35;pointer-events:none}.ps-tone-row--no-audio:hover{background:var(--ps-surface);border-color:var(--ps-line);transform:none}.ps-tone-row__no-audio{font-size:.65rem;color:var(--ps-muted);white-space:nowrap;padding:0 4px}.ps-play-btn{width:28px;height:28px;border-radius:50%;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;background:var(--ps-brand);color:#fff;transition:transform .15s;padding:0;flex-shrink:0}.ps-play-btn:hover{transform:scale(1.15)}.ps-play-btn svg{width:16px;height:16px}.ps-play-btn--sm{width:10px;height:10px}.ps-play-btn--sm svg{width:7px;height:7px}.ps-play-btn--xs{width:22px;height:22px}.ps-play-btn--xs svg{width:12px;height:12px}.ps-play-btn--lg{width:32px;height:32px}.ps-play-btn--lg svg{width:18px;height:18px}@keyframes ps-wave{0%,to{transform:scaleY(1)}50%{transform:scaleY(2)}}.ps-play-btn{position:relative}.ps-play-btn .ps-wave{display:none;align-items:center;gap:2px;height:16px}.ps-play-btn.is-playing .ps-wave{display:flex}.ps-play-btn.is-playing .ps-play-btn__icon{display:none}.ps-play-btn .ps-wave span{display:block;width:3px;border-radius:2px;background:#fff;height:8px;animation:ps-wave .35s ease-in-out 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var(--ps-brand);background:transparent;font-family:var(--ps-font-stack);font-size:.82rem;font-weight:600;color:var(--ps-brand);cursor:pointer;transition:all .3s}.ps-welcome__btn:hover{background:var(--ps-brand);color:#fff;box-shadow:0 10px 30px #f15a654d;transform:translateY(-5px)}.ps-section__header{margin-bottom:var(--ps-space-2xl)}.ps-section__title{font-weight:700;font-size:1.1rem;color:var(--ps-ink)}.ps-section__sub{font-size:1.18em;color:var(--ps-muted);margin-top:2px}.ps-page-title{margin-bottom:var(--ps-space-3xl)}.ps-page-title__badge{display:inline-block;width:fit-content;max-width:max-content;background:var(--ps-brand);color:#fff;font-weight:700;border-radius:var(--ps-radius-pill);padding:6px 22px;font-size:1rem;margin-bottom:var(--ps-space-sm)}.ps-page-title__badge--lg{font-size:1.3rem;padding:8px 26px}.ps-page-title p{font-size:.85rem;color:var(--ps-muted);margin:2px 0 0}.ps-group{margin-bottom:var(--ps-space-3xl)}.ps-group__header{display:flex;align-items:center;gap:8px;margin-bottom:14px}.ps-group__label{display:inline-flex;width:fit-content;max-width:max-content;flex:0 0 auto;background:var(--ps-brand);border-radius:var(--ps-radius-pill);padding:3px 14px;font-size:.82rem;font-weight:600;color:#fff}.ps-group__badge{display:inline-flex;width:fit-content;max-width:max-content;flex:0 0 auto;font-size:.68rem;font-weight:600;color:var(--ps-muted);background:var(--ps-surface);padding:1px 10px;border-radius:var(--ps-radius-pill);border:1px solid var(--ps-line)}@keyframes ps-fade-in{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}.ps-page-enter{animation:ps-fade-in .35s cubic-bezier(.4,0,.2,1)}.ps-back{display:inline-flex;align-items:center;gap:var(--ps-space-sm);margin-bottom:var(--ps-space-2xl);font-family:var(--ps-font-stack);font-size:.75rem;font-weight:600;color:var(--ps-muted);cursor:pointer;padding:var(--ps-space-sm) var(--ps-space-md);border-radius:var(--ps-radius-pill);border:1px solid var(--ps-line);background:var(--ps-surface);transition:background .3s,box-shadow .3s,transform .3s,color .3s}.ps-back:hover{color:#fff;background:var(--ps-brand);border-color:var(--ps-brand);box-shadow:0 10px 30px #f15a654d;transform:translateY(-5px)}.ps-chart{border:1px solid var(--ps-line);border-radius:var(--ps-radius-card);background:var(--ps-surface);overflow:auto}.ps-chart__table{border-collapse:collapse;font-size:1rem;width:100%}.ps-chart__table th,.ps-chart__table td{padding:4px 2px;text-align:center;border:1px solid var(--ps-line);overflow:hidden;text-overflow:ellipsis}.ps-chart__table thead th{position:sticky;top:0;background:var(--ps-brand);font-family:var(--ps-font-pinyin);font-weight:600;color:#fff;z-index:1;white-space:nowrap;font-size:.85rem}.ps-chart__table .ps-chart__row-label{position:sticky;left:0;background:var(--ps-brand);font-family:var(--ps-font-pinyin);font-weight:700;color:#fff;z-index:2;width:36px;min-width:36px;font-size:.85rem}.ps-chart__table thead .ps-chart__row-label{z-index:3}.ps-chart__table td.ps-chart__cell{font-family:var(--ps-font-pinyin);font-weight:500;color:var(--ps-ink);font-size:.8rem;transition:all .15s;white-space:nowrap;background:var(--ps-surface);cursor:pointer}.ps-chart__table td.ps-chart__cell:hover{background:var(--ps-brand);color:#fff;box-shadow:0 4px 16px #f15a6559;border-radius:6px;z-index:1;position:relative}.ps-chart__table td.ps-chart__empty{background:var(--ps-bg)}.ps-tabs-mobile{display:none;position:relative;padding:0 var(--ps-space-sm);gap:var(--ps-space-xs);background:var(--ps-surface);border-bottom:1px solid var(--ps-line)}.ps-tabs-mobile__indicator{position:absolute;top:4px;bottom:4px;border-radius:var(--ps-radius-pill);background:var(--ps-brand);z-index:0;transition:left .25s cubic-bezier(.4,0,.2,1),width .25s cubic-bezier(.4,0,.2,1);pointer-events:none}.ps-tabs-mobile__btn{flex:1;padding:var(--ps-space-sm) var(--ps-space-xs);border:none;background:transparent;position:relative;z-index:1;font-family:var(--ps-font-stack);font-size:.82rem;font-weight:600;color:var(--ps-ink);cursor:pointer;border-radius:var(--ps-radius-pill);white-space:nowrap;transition:color .2s}.ps-tabs-mobile__btn:hover{color:var(--ps-brand);transform:translateY(-1px)}.ps-tabs-mobile__btn.is-active{color:#fff}.ps-tabs-mobile__reset{flex:0 0 auto;padding:var(--ps-space-sm) var(--ps-space-md);margin-left:auto;border:1px solid var(--ps-line);border-radius:var(--ps-radius-pill);background:var(--ps-surface);color:var(--ps-ink-soft);font-family:var(--ps-font-stack);font-size:.75rem;font-weight:600;cursor:pointer;position:relative;z-index:1;-webkit-appearance:none;-moz-appearance:none;appearance:none}.ps-tabs-mobile__reset:hover,.ps-tabs-mobile__reset:focus-visible{background:var(--ps-brand)!important;border-color:var(--ps-brand)!important;color:#fff!important}.ps-modal{display:none;position:fixed;top:0;right:0;bottom:0;left:0;z-index:1000;align-items:center;justify-content:center}.ps-modal.is-open{display:flex}.ps-modal.is-closing{display:flex;animation:ps-modal-exit .25s cubic-bezier(.4,0,.2,1) both}.ps-modal__backdrop{position:absolute;top:0;right:0;bottom:0;left:0;background:#00000059;animation:ps-fade-in .3s ease}.ps-modal.is-closing .ps-modal__backdrop{animation:ps-fade-out .22s ease both}.ps-modal__frame{position:relative;width:50%;min-width:420px;aspect-ratio:10/16;max-height:92vh;overflow:hidden;border-radius:1.75rem;z-index:1;box-shadow:0 20px 60px #0003,0 0 0 1px #ffffff0f inset;background:var(--ps-surface);animation:ps-modal-enter .35s cubic-bezier(.16,1,.3,1);transform-style:preserve-3d;will-change:transform}.ps-modal.is-closing .ps-modal__frame{animation:ps-modal-exit .25s cubic-bezier(.4,0,.2,1) both}@keyframes ps-modal-enter{0%{opacity:0;transform:scale(.5)}to{opacity:1;transform:scale(1)}}@keyframes ps-modal-exit{0%{opacity:1;transform:scale(1)}to{opacity:0;transform:scale(.92)}}@keyframes ps-fade-out{0%{opacity:1}to{opacity:0}}@keyframes ps-fade-in{0%{opacity:0}to{opacity:1}}@keyframes ps-btn-enter{0%{opacity:0;transform:scale(.85)}to{opacity:1;transform:scale(1)}}.ps-modal__track{display:flex;height:100%;transition:transform .45s cubic-bezier(.4,0,.2,1)}.ps-modal__card{flex:0 0 100%;background:var(--ps-surface);padding:var(--ps-space-3xl);overflow-y:auto;display:flex;flex-direction:column;justify-content:center;align-items:center;height:100%;box-sizing:border-box}.ps-modal__close{position:absolute;top:var(--ps-space-sm);right:var(--ps-space-sm);width:32px;height:32px;min-width:32px;max-width:32px;min-height:32px;max-height:32px;aspect-ratio:1/1;border-radius:50%;border:1px solid rgba(0,0,0,.15);background:#ffffffe6;cursor:pointer;font-size:.8rem;color:var(--ps-ink);display:flex;align-items:center;justify-content:center;flex:0 0 32px;padding:0;line-height:1;z-index:5;box-sizing:border-box;-webkit-appearance:none;-moz-appearance:none;appearance:none;transition:background .15s,border-color .15s,color 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