:root{--font:"Be Vietnam Pro","Noto Sans SC",system-ui,sans-serif;--font-zh:"Noto Sans SC","Be Vietnam Pro",system-ui,sans-serif;--light:var(--speak);--light-60:var(--speak-60);--light-12:var(--speak-12);--on-light:var(--on-speak);--muted:color-mix(in srgb,var(--ink) 64%,var(--white));--line:color-mix(in srgb,var(--ink) 12%,var(--white));--r-sm:8px;--r-md:16px;--r-lg:24px;--r-pill:999px;--sp:8px;--shadow:0 1px 2px color-mix(in srgb,var(--ink) 8%,transparent),0 8px 24px color-mix(in srgb,var(--ink) 6%,transparent);--ease:cubic-bezier(.2,.8,.2,1);color-scheme:light}[data-theme=dark]{--muted:color-mix(in srgb,var(--white) 70%,var(--ink));--line:color-mix(in srgb,var(--white) 16%,var(--ink));color-scheme:dark}*,:after,:before{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--white);color:var(--ink);font:400 17px/1.6 var(--font)}[data-theme=dark] body{background:var(--ink);color:var(--white)}.zh,:lang(zh-Hans){font-family:var(--font-zh)}img{max-width:100%;height:auto;display:block}a{color:inherit}h1,h2,h3{font-weight:800;line-height:1.2;margin:0;letter-spacing:-.01em}h1{font-size:clamp(30px,5vw,48px)}h2{font-size:clamp(22px,3vw,30px)}h3{font-size:19px}p{margin:0}:focus-visible{outline:3px solid var(--light);outline-offset:2px;border-radius:4px}.sr-only{width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}.skip,.sr-only{position:absolute}.skip{left:-999px;top:8px;background:var(--ink);color:var(--white);padding:8px 16px;border-radius:var(--r-sm);z-index:99}.skip:focus{left:8px}.wrap{width:min(1160px,100% - 32px);margin-inline:auto}.section{padding-block:calc(var(--sp) * 6)}.stack{flex-direction:column;gap:calc(var(--sp) * 1.5)}.row,.stack{display:flex}.row{flex-wrap:wrap;align-items:center;gap:var(--sp)}.grid{display:grid;grid-gap:calc(var(--sp) * 3);gap:calc(var(--sp) * 3)}.grid-3{grid-template-columns:repeat(auto-fill,minmax(240px,1fr))}.grid-2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}.caption,.muted{color:var(--muted)}.caption{font-size:14px}.eyebrow,.label{font-size:14px;font-weight:600}.eyebrow{letter-spacing:.06em;text-transform:uppercase}.eyebrow,.lead{color:var(--muted)}.lead{font-size:19px;max-width:680px}.link{color:inherit;text-underline-offset:3px}button.link{border-color:currentColor}input,select,textarea{color:var(--ink)}.site-header{background:var(--white);border-bottom:1px solid var(--line)}.site-header .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-block:12px;flex-wrap:wrap}.wordmark-link{display:block;background:var(--white);border-radius:var(--r-sm)}.wordmark{width:160px;height:auto}.nav{display:flex;gap:4px;flex-wrap:wrap}.nav,.nav a{align-items:center}.nav a{text-decoration:none;font-weight:600;padding:10px 14px;border-radius:var(--r-pill);min-height:44px;display:inline-flex}.nav a:hover{background:var(--soft-grey)}.nav a[aria-current=page]{background:var(--ink);color:var(--white)}.lang-switch{display:flex;gap:2px;background:var(--soft-grey);border-radius:var(--r-pill);padding:4px}.lang-switch a{text-decoration:none;font-weight:600;font-size:14px;padding:8px 12px;border-radius:var(--r-pill);min-height:36px;display:inline-flex;align-items:center;color:var(--ink)}.lang-switch a[aria-current=true]{background:var(--white);box-shadow:var(--shadow)}.site-footer{background:var(--soft-grey);margin-top:calc(var(--sp) * 8)}[data-theme=dark] .site-footer,[data-theme=dark] .site-header{background:var(--ink)}.site-footer .wrap{padding-block:calc(var(--sp) * 5);display:grid;grid-gap:24px;gap:24px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.site-footer h3{font-size:15px;margin-bottom:8px}.site-footer ul{list-style:none;margin:0;padding:0;display:grid;grid-gap:6px;gap:6px}.site-footer a{text-decoration:none}.site-footer a:hover{text-decoration:underline}.spectrum{display:grid;grid-template-columns:repeat(6,1fr);height:6px}.spectrum.tall{height:10px;overflow:hidden}.btn,.spectrum.tall{border-radius:var(--r-pill)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:0 22px;border:2px solid transparent;font:600 16px/1 var(--font);cursor:pointer;text-decoration:none;transition:transform .15s var(--ease),background .15s}.btn:active{transform:scale(.98)}.btn-primary{background:var(--light);color:var(--on-light)}.btn-dark{background:var(--ink);color:var(--white)}[data-theme=dark] .btn-dark{background:var(--white);color:var(--ink)}.btn-ghost{background:transparent;border-color:var(--line);color:inherit}.btn-ghost:hover{background:var(--soft-grey)}[data-theme=dark] .btn-ghost:hover{background:color-mix(in srgb,var(--white) 10%,transparent)}.btn-sm{min-height:40px;padding:0 16px;font-size:14px}.btn[disabled]{opacity:.5;cursor:not-allowed}.input{width:100%;min-height:48px;padding:10px 16px;border:2px solid var(--line);border-radius:var(--r-md);font:inherit;background:var(--white);color:var(--ink)}.input:focus{border-color:var(--light);outline:none}.err{color:var(--move);font-size:14px;min-height:1em}.seg{display:inline-flex;background:var(--soft-grey);border-radius:var(--r-pill);padding:4px;gap:2px}[data-theme=dark] .seg{background:color-mix(in srgb,var(--white) 10%,transparent)}.seg button{border:0;background:transparent;color:inherit;font:600 14px var(--font);padding:8px 14px;border-radius:var(--r-pill);min-height:40px;cursor:pointer}.seg button[aria-pressed=true]{background:var(--white);color:var(--ink);box-shadow:var(--shadow)}.chips{display:flex;flex-wrap:wrap;gap:8px}.chip{display:inline-flex;align-items:center;gap:6px;border:1px solid var(--line);border-radius:var(--r-pill);padding:6px 14px;font-size:14px;font-weight:600;text-decoration:none;background:transparent;color:inherit;font-family:var(--font);cursor:pointer;min-height:40px}.chip[aria-current=page],.chip[aria-pressed=true]{background:var(--ink);color:var(--white);border-color:var(--ink)}.chip i{width:10px;height:10px;border-radius:50%}.check{display:inline-flex;gap:10px;align-items:center;font-weight:600;cursor:pointer;min-height:44px}.check input{width:22px;height:22px;accent-color:var(--light)}.notice{border-radius:var(--r-md);padding:14px 18px;background:var(--soft-grey)}.notice.info{background:var(--light-12)}.notice.ok{background:var(--explore-12)}.notice.warn{background:var(--feel-12)}[data-theme=dark] .notice{background:color-mix(in srgb,var(--white) 8%,transparent)}.card{background:var(--white);border:1px solid var(--line);border-radius:var(--r-lg);padding:clamp(20px,3vw,32px)}[data-theme=dark] .card{background:color-mix(in srgb,var(--white) 5%,var(--ink))}.block{margin-top:calc(var(--sp) * 3);scroll-margin-top:16px}.block>h2{margin-bottom:16px}.light-badge{display:inline-flex;align-items:center;gap:8px;background:var(--light);color:var(--on-light);border-radius:var(--r-pill);padding:6px 12px;font-weight:800;font-size:14px;line-height:1;white-space:nowrap}.light-badge.sm{font-size:12px;padding:4px 10px;gap:6px}.lb-level{display:inline-flex;gap:2px;align-items:flex-end}.lb-level i{width:4px;height:12px;border-radius:2px;background:currentColor;opacity:.3}.lb-level i.on{opacity:1}.light-badge.sm .lb-level i{height:10px;width:3px}.lb-age{font-weight:800}.light-badge[data-light=MOVE],.light-badge[data-light=MOVE].sm{font-size:19px}.light-tag{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600}.light-tag i{width:12px;height:12px;border-radius:50%;background:var(--light);flex:none}.cover{position:relative;border-radius:var(--r-md);overflow:hidden;background:var(--soft-grey);aspect-ratio:1}.cover img{width:100%;height:100%;object-fit:cover}.cover .light-badge{position:absolute;top:10px;left:10px}.cover-ph{display:grid;place-items:center;height:100%;padding:16px;text-align:center;font-weight:800;background:var(--light-12)}.title-card{display:flex;flex-direction:column;gap:12px;text-decoration:none;color:inherit;border-radius:var(--r-lg);padding:12px;transition:background .2s}.title-card:hover{background:var(--soft-grey)}.title-card h3{font-size:18px}.hero{padding-block:clamp(32px,6vw,72px);display:grid;grid-gap:32px;gap:32px;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));align-items:center}.hero h1{font-size:clamp(34px,6vw,60px)}.hero .cover{max-width:420px;justify-self:center;width:100%;box-shadow:var(--shadow)}.lights-grid{display:grid;grid-gap:16px;gap:16px;grid-template-columns:repeat(auto-fill,minmax(170px,1fr))}.light-tile{border-radius:var(--r-lg);padding:18px;background:var(--light-12);display:flex;flex-direction:column;gap:6px}.light-tile b{font-size:20px;font-weight:800}.light-tile .dot{width:28px;height:28px;border-radius:50%;background:var(--light)}.levels{display:grid;grid-gap:12px;gap:12px;grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}.level-card{border:1px solid var(--line);border-radius:var(--r-md);padding:16px;display:grid;grid-gap:6px;gap:6px}.bars{display:inline-flex;gap:3px;align-items:flex-end}.bars i{width:6px;height:18px;border-radius:3px;background:var(--ink);opacity:.18}.bars i.on{opacity:1}[data-theme=dark] .bars i{background:var(--white)}.play-head{display:grid;grid-template-columns:minmax(140px,240px) 1fr;grid-gap:clamp(16px,4vw,40px);gap:clamp(16px,4vw,40px);align-items:center;padding-block:32px 8px}@media (max-width:560px){.play-head{grid-template-columns:1fr}.play-head .cover{max-width:220px}}.play-band{background:var(--light-12)}[data-theme=dark] .play-band{background:color-mix(in srgb,var(--light) 18%,var(--ink))}.jump{display:flex;gap:8px;overflow-x:auto;padding-block:12px;scrollbar-width:none}.jump a{flex:none}.reader{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,1fr);grid-gap:24px;gap:24px;align-items:start}@media (max-width:760px){.reader{grid-template-columns:1fr}}.pageimg{border-radius:var(--r-md);overflow:hidden;background:var(--soft-grey)}.text{font-size:clamp(20px,2.6vw,26px);font-weight:600;line-height:1.5;white-space:pre-line}.zh-py{display:block;color:var(--muted);font-style:normal}.player{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.icon-btn{width:48px;height:48px;border-radius:50%;border:2px solid var(--line);background:transparent;color:inherit;display:grid;place-items:center;cursor:pointer;font-size:22px}.icon-btn svg,.play-main svg{width:24px;height:24px}.play-main{width:64px;height:64px;border-radius:50%;border:0;background:var(--light);color:var(--on-light);display:grid;place-items:center;cursor:pointer;font-size:24px}.scrub{width:100%;accent-color:var(--light);color:var(--ink)}.page-strip{display:flex;gap:8px;overflow-x:auto;padding-bottom:6px}.page-strip button{flex:none;width:72px;border:2px solid transparent;border-radius:var(--r-sm);padding:0;background:none;cursor:pointer;position:relative;color:inherit}.page-strip button[aria-current=true]{border-color:var(--light)}.page-strip img{border-radius:6px;aspect-ratio:1;object-fit:cover}.page-strip span{position:absolute;bottom:2px;right:4px;font-size:12px;font-weight:800;background:var(--white);color:var(--ink);border-radius:4px;padding:0 4px}.activity{border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden}.activity summary{list-style:none;cursor:pointer;padding:16px 18px;display:flex;flex-wrap:wrap;justify-content:space-between;gap:8px;align-items:center;min-height:56px}.activity summary::-webkit-details-marker{display:none}.activity[open] summary{border-bottom:1px solid var(--line)}.activity .inner{padding:18px;display:grid;grid-gap:14px;gap:14px}.activity.done{border-color:var(--light)}.kv{display:grid;grid-gap:4px;gap:4px}.kv b{font-size:14px;color:var(--muted)}.kv ol{margin:0;padding-left:20px;display:grid;grid-gap:4px;gap:4px}.say{background:var(--soft-grey);border-radius:var(--r-sm);padding:10px 14px}[data-theme=dark] .say{background:color-mix(in srgb,var(--white) 8%,transparent)}.safety{border-left:4px solid var(--light);padding:8px 12px;background:var(--light-12);border-radius:0 var(--r-sm) var(--r-sm) 0}[data-theme=dark] .safety{background:transparent}.meta{display:inline-flex;gap:8px;align-items:center;font-size:14px;color:var(--muted)}.word-chip{display:grid;grid-gap:2px;gap:2px;text-align:left;border:2px solid var(--line);border-radius:var(--r-md);padding:10px 16px;background:transparent;color:inherit;font-family:var(--font);cursor:pointer;min-height:48px}.word-chip small{color:var(--muted)}.yt-facade{position:relative;aspect-ratio:16/9;border-radius:var(--r-md);overflow:hidden;background:var(--ink);display:grid;place-items:center;color:var(--white);text-align:center;padding:16px}.yt-facade iframe{position:absolute;inset:0;width:100%;height:100%;border:0}.light-up{animation:light-up .4s var(--ease)}@keyframes light-up{0%{box-shadow:0 0 0 0 var(--light-60)}60%{box-shadow:0 0 0 10px var(--light-12)}to{box-shadow:0 0 0 0 transparent}}@media (prefers-reduced-motion:reduce){.light-up{animation:none}}.child-mode{position:fixed;inset:0;z-index:100;background:var(--ink);color:var(--white);display:grid;grid-template-rows:auto 1fr auto;touch-action:manipulation;-webkit-user-select:none;-moz-user-select:none;user-select:none}.child-mode .exit{justify-self:end;margin:12px;position:relative;overflow:hidden;border:2px solid color-mix(in srgb,var(--white) 30%,transparent);background:transparent;color:var(--white);border-radius:var(--r-pill);padding:10px 18px;font:600 14px var(--font)}.child-mode .exit .fill{position:absolute;inset:0;background:color-mix(in srgb,var(--white) 25%,transparent);transform:scaleX(0);transform-origin:left}.child-mode .exit span:last-child{position:relative}.child-mode .stage{display:grid;place-items:center;padding:16px;min-height:0}.child-mode .stage img{max-height:100%;max-width:100%;object-fit:contain;border-radius:var(--r-md)}.child-mode .controls{display:flex;justify-content:center;gap:clamp(16px,6vw,48px);padding:20px 20px 32px}.child-mode .big{width:clamp(80px,20vw,120px);height:clamp(80px,20vw,120px);border-radius:50%;border:0;display:grid;place-items:center;cursor:pointer;background:var(--white);color:var(--ink)}.child-mode .big.main{background:var(--light);color:var(--on-light)}.child-mode .big svg{width:44%;height:44%}.child-mode .end{display:grid;place-items:center;align-content:center;grid-gap:16px;gap:16px;text-align:center;font-size:clamp(26px,5vw,40px);font-weight:800;padding:24px}.lightmap{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));grid-gap:12px;gap:12px}.lm-cell{border-radius:var(--r-lg);padding:16px;display:grid;grid-gap:8px;gap:8px;background:var(--light-12)}.lm-bulbs{display:flex;gap:6px;flex-wrap:wrap}.lm-bulbs i{width:18px;height:18px;border-radius:50%;border:2px solid var(--light)}.lm-bulbs i.on{background:var(--light)}.table{width:100%;border-collapse:collapse;font-size:15px}.table td,.table th{text-align:left;padding:10px 12px;border-bottom:1px solid var(--line);vertical-align:top}.table th{font-size:13px;color:var(--muted);font-weight:600}.field{display:grid;grid-gap:6px;gap:6px}.field>span{font-size:14px;font-weight:600}.price{font-weight:800;font-size:22px}.price s{font-weight:400;color:var(--muted);font-size:16px;margin-left:8px}.spectrum-legend{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));grid-gap:0;gap:0}.sl-item{display:grid;grid-gap:6px;gap:6px;padding-right:12px;align-content:start}.sl-item i{height:10px;display:block}.sl-item:first-child i{border-radius:var(--r-pill) 0 0 var(--r-pill)}.sl-item:last-child i{border-radius:0 var(--r-pill) var(--r-pill) 0}@media (max-width:760px){.spectrum-legend{grid-template-columns:repeat(3,minmax(0,1fr));row-gap:16px}.sl-item i{border-radius:var(--r-pill)!important}}.greeting{font-size:20px;font-weight:800;border-left:6px solid var(--light);padding-left:12px}.consent{position:fixed;left:0;right:0;bottom:0;z-index:50;background:var(--white);border-top:1px solid var(--line);box-shadow:0 -8px 24px color-mix(in srgb,var(--ink) 8%,transparent)}.consent-in{display:flex;gap:16px;align-items:center;flex-wrap:wrap;padding-block:14px}[data-theme=dark] .consent{background:var(--ink)}.linkbtn{background:none;border:0;padding:0;font:inherit;color:inherit;text-decoration:underline;cursor:pointer}.nav-lights{position:relative}.nav-lights summary{list-style:none;cursor:pointer;font-weight:600;padding:10px 14px;border-radius:var(--r-pill);min-height:44px;display:inline-flex;align-items:center}.nav-lights summary::-webkit-details-marker{display:none}.nav-lights summary:hover,.nav-lights[open] summary{background:var(--soft-grey)}.nav-lights-menu{position:absolute;z-index:40;top:calc(100% + 4px);left:0;background:var(--white);border:1px solid var(--line);border-radius:var(--r-md);box-shadow:var(--shadow);padding:6px;display:grid;min-width:180px}.nav-lights-menu a{display:flex;gap:10px;align-items:center;text-decoration:none;padding:10px 12px;border-radius:var(--r-sm);font-weight:600;min-height:44px}.nav-lights-menu a:hover{background:var(--soft-grey)}[data-theme=dark] .nav-lights-menu{background:var(--ink)}