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;--lightningcss-dark:initial;color-scheme:dark}}:root[data-theme=dark]{--paper:#14161a;--panel:#1d2026;--panel-2:#23272e;--ink:#f2f1ec;--ink-2:#c5c8cf;--muted:#8b909a;--line:#2c3038;--line-2:#3a3f49;--accent:#f26a3c;--accent-2:#ff8a5c;--accent-soft:#3a2320;--jade:#2fc397;--jade-soft:#163329;--gold:#e6b65a;--gold-soft:#3a2f16;--blue:#6a9cff;--blue-soft:#1d2a45;--tone1:#ff6b5e;--tone2:#f5b942;--tone3:#3ecf94;--tone4:#6a9cff;--tone0:#9aa0aa;--stroke-outline:#ffffff2e;--shadow:0 10px 30px #00000059;--shadow-lg:0 24px 60px #00000080;--lightningcss-light: ;--lightningcss-dark:initial;color-scheme:dark}*,:before,:after{box-sizing:border-box}[hidden]{display:none!important}html{-webkit-text-size-adjust:100%}body{background:var(--paper);min-height:100vh;color:var(--ink);font:16px/1.5 var(--font-ui);-webkit-font-smoothing:antialiased;margin:0}body:before{content:"";z-index:-1;pointer-events:none;background:radial-gradient(60rem 30rem at 110% -10%, color-mix(in srgb, var(--accent) 10%, 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svg{width:100%;height:100%}.brand-accent{color:var(--accent)}.tone-1{color:var(--tone1)}.tone-2{color:var(--tone2)}.tone-3{color:var(--tone3)}.tone-4{color:var(--tone4)}.tone-0{color:var(--tone0)}.tone-dot{background:currentColor;border-radius:50%;width:.6em;height:.6em;margin-right:.3em;display:inline-block}.tone-dot.tone-1{background:var(--tone1)}.tone-dot.tone-2{background:var(--tone2)}.tone-dot.tone-3{background:var(--tone3)}.tone-dot.tone-4{background:var(--tone4)}.tone-dot.tone-0{background:var(--tone0)}#app{grid-template-columns:var(--sidebar) 1fr;min-height:100vh;display:grid}.sidebar{border-right:1px solid var(--line);background:color-mix(in srgb, var(--panel) 70%, var(--paper));-webkit-backdrop-filter:blur(12px);backdrop-filter:blur(12px);flex-direction:column;height:100vh;padding:22px 14px;display:flex;position:sticky;top:0}.brand{align-items:center;gap:12px;padding:6px 10px 22px;display:flex}.brand-mark{background:linear-gradient(135deg, var(--accent), 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var(--line);border-radius:99px;padding:7px 12px;font-size:.9rem;font-weight:700}.chip-word{font-size:1.15rem}.chip-word small{color:var(--muted);font-size:.75rem;font-family:var(--font-ui);margin-left:.35em}.field{flex-direction:column;gap:6px;margin:12px 0;font-size:.9rem;font-weight:700;display:flex}.field input,.field select{font-weight:500}.field.big input{border:1px solid var(--line-2);background:var(--panel);border-radius:12px;padding:12px 14px;font-size:1.1rem}input[type=text],input[type=search],input[type=email],input[type=password]{border:1px solid var(--line-2);background:var(--panel);border-radius:12px;width:100%;min-height:44px;padding:0 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var(--font-ui);fill:var(--ink)}.streak-pill{background:var(--panel);border:1px solid var(--line);color:var(--muted);border-radius:18px;flex-direction:column;align-items:center;min-width:92px;padding:12px 18px;display:flex}.streak-pill strong{color:var(--ink);font-size:1.6rem;line-height:1}.streak-pill span{font-size:.72rem;font-weight:700}.streak-pill .icon{color:var(--line-2);width:1.5em;height:1.5em}.streak-pill.lit .icon{color:var(--accent);filter:drop-shadow(0 4px 8px color-mix(in srgb, var(--accent) 40%, transparent))}.plan-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}.plan-head{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;margin-bottom:14px;display:flex}.plan-head p{color:var(--muted);font-size:.9rem}.plan-steps{flex-direction:column;gap:6px;margin:0;padding:0;list-style:none;display:flex}.plan-step a{border:1px solid #0000;border-radius:14px;grid-template-columns:38px 1fr 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p{color:var(--ink-2);font-size:1.15rem}.achievement-grid{grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:10px;display:grid}.achievement{text-align:center;background:var(--panel-2);opacity:.55;filter:grayscale();border-radius:14px;flex-direction:column;align-items:center;gap:2px;padding:14px 10px;display:flex}.achievement.unlocked{opacity:1;filter:none;background:linear-gradient(160deg, var(--gold-soft), var(--panel));border:1px solid color-mix(in srgb, var(--gold) 40%, transparent)}.achievement-emoji{font-size:1.8rem}.achievement strong{font-size:.88rem}.achievement small{color:var(--muted);font-size:.72rem}.onboarding-back{color:var(--muted);align-items:center;gap:6px;font-size:.85rem;font-weight:700;display:inline-flex}body.landing-mode .sidebar,body.landing-mode .tabbar{display:none}body.landing-mode #app{grid-template-columns:1fr}body.landing-mode .view{max-width:none;padding:0}.landing{--wrap:min(1120px, calc(100% - 2 * clamp(16px, 4vw, 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i{font-style:normal}.demo-pinyin{font-size:1.3rem;font-weight:800}.demo-english{color:var(--ink-2);margin-bottom:18px}.demo-grades{grid-template-columns:repeat(4,1fr);gap:6px;display:grid}.demo-grades span{border:2px solid var(--line);border-radius:10px;flex-direction:column;padding:8px 4px;font-size:.8rem;font-weight:800;display:flex}.demo-grades small{color:var(--muted);font-size:.68rem;font-weight:700}.demo-grades .bad{border-color:color-mix(in srgb, var(--danger) 40%, transparent)}.demo-grades .warn{border-color:color-mix(in srgb, var(--gold) 60%, transparent)}.demo-grades .ok{border-color:var(--jade);background:var(--jade-soft)}.demo-grades .great{border-color:color-mix(in srgb, var(--blue) 50%, transparent)}.demo-chip{background:var(--panel);border:1px solid var(--line);box-shadow:var(--shadow);border-radius:99px;align-items:center;gap:6px;padding:8px 12px;font-size:.8rem;font-weight:800;animation:4s ease-in-out infinite float;display:inline-flex;position:absolute}.demo-chip .icon{color:var(--jade)}.demo-chip-1{top:6%;left:0}.demo-chip-2{animation-delay:1.4s;bottom:6%;right:0}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-8px)}}@media (max-width:860px){.demo-chip{display:none}.hero-demo{min-height:0}.demo-card{transform:none}}.stats-strip{width:var(--wrap);border-top:1px solid var(--line);border-bottom:1px solid var(--line);grid-template-columns:repeat(5,1fr);margin:0 auto;padding:22px 0;display:grid}.stats-strip div{text-align:center;flex-direction:column;align-items:center;padding:6px;display:flex}.stats-strip strong{letter-spacing:-.03em;font-size:1.6rem}.stats-strip span{color:var(--muted);font-size:.8rem;font-weight:700}@media (max-width:760px){.stats-strip{grid-template-columns:repeat(2,1fr);gap:8px}.stats-strip div:last-child{grid-column:1/-1}}.landing-section{width:var(--wrap);margin:0 auto;padding:clamp(48px,8vw,96px) 0 0}.landing-section .section-intro{max-width:720px;margin-bottom:32px}.landing-section h2{letter-spacing:-.03em;margin:8px 0 12px;font-size:clamp(1.7rem,3.4vw,2.5rem)}.day-timeline{grid-template-columns:repeat(4,1fr);gap:16px;margin:0 0 18px;padding:0;list-style:none;display:grid}@media (max-width:860px){.day-timeline{grid-template-columns:1fr 1fr}}@media (max-width:520px){.day-timeline{grid-template-columns:1fr}}.day-timeline li{border-radius:var(--radius);background:var(--panel);border:1px solid var(--line);gap:12px;padding:18px;display:flex}.day-index{background:var(--accent);color:#fff;border-radius:10px;flex:none;place-items:center;width:32px;height:32px;font-weight:800;display:grid}.day-head{justify-content:space-between;align-items:baseline;gap:8px;margin-bottom:4px;display:flex}.day-head small{color:var(--muted);font-weight:700}.day-timeline p{color:var(--ink-2);font-size:.92rem}.feature-grid{grid-template-columns:repeat(3,1fr);gap:16px;display:grid}@media (max-width:860px){.feature-grid{grid-template-columns:1fr 1fr}}@media 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.price-card{text-align:left;align-items:stretch;gap:8px;padding:24px}.landing-prices .price-card ul{color:var(--ink-2);flex:1;gap:6px;margin:8px 0 14px;padding-left:18px;font-size:.92rem;display:grid}.landing-prices .price-value small{color:var(--muted);letter-spacing:0;font-size:.95rem;font-weight:700}.landing-prices .price-card .btn{justify-content:center}.faq{gap:8px;max-width:800px;display:grid}.faq details{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:4px 18px}.faq summary{cursor:pointer;justify-content:space-between;align-items:center;padding:12px 0;font-weight:800;list-style:none;display:flex}.faq summary:after{content:"+";color:var(--muted);font-size:1.3rem}.faq details[open] summary:after{content:"–"}.faq p{color:var(--ink-2);padding:0 0 14px}.landing-cta{width:var(--wrap);color:#f6efe0;text-align:center;background:linear-gradient(135deg,#1d1b16,#3a2418);border-radius:28px;margin:clamp(48px,8vw,96px) auto 0;padding:clamp(36px,6vw,64px)}.landing-cta h2{letter-spacing:-.03em;font-size:clamp(1.8rem,4vw,2.8rem)}.landing-cta p{color:#cfc4ad;margin:10px 0 22px}.landing-footer{width:var(--wrap);color:var(--muted);flex-wrap:wrap;justify-content:space-between;gap:16px;margin:0 auto;padding:32px 0 48px;font-size:.82rem;display:flex}.story-prep{border-radius:var(--radius);background:var(--gold-soft);border:1px solid color-mix(in srgb, var(--gold) 40%, transparent);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:16px;padding:16px 18px;display:flex}.story-prep p{margin-top:2px}.prompt-sub{margin-top:6px}.capture{background:linear-gradient(135deg, var(--accent-soft), var(--gold-soft));border:1px solid var(--line);border-radius:24px;grid-template-columns:1.2fr 1fr;align-items:center;gap:24px;padding:clamp(22px,4vw,40px);display:grid}.capture h2{margin:6px 0 8px}.capture .form-message{grid-column:1/-1}@media (max-width:760px){.capture{grid-template-columns:1fr}}.inline-form{flex-wrap:wrap;gap:8px;margin-top:10px;display:flex}.inline-form input{flex:1;min-width:200px}.card.unlock .inline-form{margin-top:12px}.table{border-collapse:collapse;width:100%;font-size:.9rem}.table th,.table td{text-align:left;border-bottom:1px solid var(--line);padding:7px 6px}.table th{color:var(--muted);text-transform:uppercase;letter-spacing:.05em;font-size:.75rem}.table td:not(:first-child),.table th:not(:first-child){text-align:right;font-variant-numeric:tabular-nums}.card.upsell{color:#f6efe0;background:linear-gradient(135deg,#1d1b16,#3a2418);border:0}.card.upsell h3{color:#fff;margin:10px 0 6px;font-size:1.3rem}.card.upsell p{color:#d8ccb4;margin-bottom:14px}.card.upsell .badge-pro{color:var(--gold);background:#ffffff1f}.share-row{justify-content:center;display:flex}