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var(--line);grid-column:1/-1;grid-template-columns:1fr auto;align-items:center;gap:12px;padding-top:14px;display:grid}.developer-identity{align-items:center;gap:10px;min-width:0;display:flex}.developer-identity>span{gap:3px;display:grid}.developer-row small{color:var(--muted);font-size:12px}.developer-row button{color:var(--primary);background:var(--primary-soft);cursor:pointer;border:0;border-radius:10px;padding:8px 10px;font-size:12px;font-weight:650}.wechat-contact{align-items:center;gap:8px;display:flex}.wechat-brand-icon{background:#07c160;flex:none;width:22px;height:22px;-webkit-mask:url(/wechat.svg) 50%/contain no-repeat;mask:url(/wechat.svg) 50%/contain no-repeat}.danger-zone{gap:10px;display:grid}.danger-zone h2{margin-bottom:2px}.toast{z-index:8;width:calc(100% - 32px);color:var(--text);background:var(--surface);border:1px solid var(--line);text-align:center;border-radius:14px;margin:-58px auto 14px;padding:12px 14px;font-size:13px;position:sticky;bottom:82px;box-shadow:0 12px 34px #00000029}@media (max-width:520px){.site-frame{padding:0;display:block}.app-shell{width:100%;height:100dvh;min-height:100dvh;padding-top:env(safe-area-inset-top);box-shadow:none;border:0;border-radius:0}.app-screen{padding-top:24px;padding-left:max(22px, env(safe-area-inset-left));padding-right:max(22px, env(safe-area-inset-right))}.app-shell:not(:has(.bottom-nav)) .app-screen{padding-bottom:calc(34px + env(safe-area-inset-bottom))}}@media (max-width:360px){.app-screen{padding-left:max(16px, env(safe-area-inset-left));padding-right:max(16px, env(safe-area-inset-right))}.study-overview{padding:16px}.overview-heading{align-items:flex-start}.setting-row:has(.setting-select){grid-template-columns:1fr;gap:10px}.setting-select{width:100%;max-width:100%}.developer-row{grid-template-columns:1fr}.wechat-contact{width:100%}.wechat-contact button{flex:1}}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important}.pronunciation-button{transition:none}.pronunciation-button.loading svg{animation:none}}:root[data-theme=dark]{--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark;--page:#090b09;--app:#151815;--surface:#202420;--surface-soft:#292e29;--text:#f1f5f0;--muted:#a8b2aa;--line:#394039;--primary:#8bd5a8;--primary-text:#102217;--primary-soft:#243a2c;--danger-text:#f0afa7;--danger-soft:#412725;--danger-border:#64403b;--warning-text:#e6c675;--warning-soft:#3d3420}.phonetic-line{color:var(--muted);overflow-wrap:anywhere;margin:10px 0 16px;font-family:Segoe UI,Arial,sans-serif;font-size:16px;font-weight:400;line-height:1.65}.phonetic-line>span{margin-right:5px;font-size:12px}@property --tw-border-style{syntax:"*";inherits:false;initial-value:solid}