.aurora-container{position:relative;width:100%;height:100%;overflow:hidden}.aurora-canvas{position:absolute;top:0;right:0;bottom:0;left:0;display:block;width:100%;height:100%}.gradient-text{position:relative;display:inline-flex;align-items:center;justify-content:center;max-width:100%;isolation:isolate}.gradient-text--border{padding:.35em .75em;border-radius:999px}.gradient-text--border:before{content:"";position:absolute;top:0;right:0;bottom:0;left:0;padding:var(--gt-border);border-radius:inherit;background-image:var(--gt-gradient);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask:linear-gradient(#000 0 0) content-box exclude,linear-gradient(#000 0 0);pointer-events:none}.gradient-text__inner{position:relative;display:inline-block}.gradient-text__content{display:inline-block;background-image:var(--gt-gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.gradient-text__glow{position:absolute;top:0;right:0;bottom:0;left:0;z-index:-1;background-image:var(--gt-gradient);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;filter:blur(.3em) saturate(1.4);opacity:var(--gt-glow);pointer-events:none;-webkit-user-select:none;user-select:none}.parallax{position:relative;overflow:hidden}.scroller{display:flex;white-space:nowrap;text-align:center;font-family:sans-serif;font-size:2.25rem;font-weight:700;letter-spacing:-.02em;filter:drop-shadow(0 1px 1px rgba(0,0,0,.1))}.scroller span{flex-shrink:0}@media(min-width:768px){.scroller{font-size:5rem;line-height:5rem}}.shiny-text{position:relative;display:inline-block;background-repeat:no-repeat;background-size:100% 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96px);pointer-events:none}button.star-border,a.star-border{cursor:pointer}.star-border:focus-visible{outline:2px solid var(--star-border-track);outline-offset:3px}.star-border:disabled{cursor:not-allowed;opacity:.5}.landing-spark{width:100%;min-height:100vh;background:#fbfaff}.landing{--ink: #1d1a33;--dim: #6b6785;--violet: #5227ff;--lime: #1f9d47;--pink: #e0457b;color:var(--ink);background:#fbfaff;overflow-x:hidden}.landing *{box-sizing:border-box}.hero{background:radial-gradient(ellipse 80% 55% at 50% 0%,rgba(82,39,255,.14),transparent 70%),radial-gradient(ellipse 60% 40% at 15% 0%,rgba(124,255,103,.18),transparent 70%),radial-gradient(ellipse 60% 40% at 90% 0%,rgba(255,148,180,.2),transparent 70%),#fbfaff;position:relative;min-height:100svh;display:grid;place-items:center;padding:24px 20px 72px;text-align:center;isolation:isolate}.hero__bg{position:absolute;top:0;right:0;bottom:0;left:0;z-index:-1;overflow:hidden}.hero__aurora{position:absolute;top:0;right:0;bottom:0;left:0}.hero__bg:after{content:"";position:absolute;top:0;right:0;bottom:0;left:0;background:linear-gradient(to bottom,transparent 40%,#fbfaff 95%);pointer-events:none}.hero__content:before{content:"";position:absolute;top:-40px;right:-10vw;bottom:-40px;left:-10vw;z-index:-1;background:radial-gradient(ellipse at center,rgba(251,250,255,.8) 0%,rgba(251,250,255,.55) 50%,transparent 78%);pointer-events:none}.hero__content{position:relative;max-width:860px;display:grid;gap:18px;justify-items:center}.eyebrow{color:#6b6785;font-size:.8rem;letter-spacing:.28em;font-weight:600}.hero__title{margin:0;display:grid;justify-items:center;gap:0;line-height:1}.hero__name{font-size:clamp(4.2rem,17vw,9.5rem);font-weight:900;letter-spacing:-.04em}.hero__sub{margin:0;font-size:clamp(2rem,8vw,4.6rem);font-weight:800;letter-spacing:-.02em;justify-content:center;color:var(--ink)}.hero__lead{max-width:34em;margin:14px 0 0;color:#3b3757;text-shadow:0 1px 12px rgba(251,250,255,.9);font-size:1.1rem;line-height:1.8}.hero__cta{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:10px}.cta{font:inherit;font-size:1.15rem;font-weight:700;padding:16px 34px;text-decoration:none;display:inline-flex;align-items:center;justify-content:center;min-height:56px;border-radius:999px;cursor:pointer}.cta--ghost{color:var(--ink);border:2px solid 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h3{margin:0 0 8px;font-size:1.25rem}.feature p{margin:0;color:var(--dim);line-height:1.7;font-size:.98rem}.steps{list-style:none;padding:0;margin:36px 0 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;text-align:left}.step{display:grid;gap:6px;padding:20px;border-radius:18px;background:#fff;border:1px solid rgba(29,26,51,.09);box-shadow:0 1px 3px #1d1a330d;color:var(--dim)}.step strong{color:var(--ink);font-size:1.15rem}.step__n{font-size:2.4rem;font-weight:900;line-height:1;background:linear-gradient(135deg,var(--lime),var(--violet));-webkit-background-clip:text;background-clip:text;color:transparent}.final{display:grid;gap:28px;justify-items:center;padding-bottom:40px}.final__title{margin:0;font-size:clamp(2.6rem,10vw,5.5rem);font-weight:900;letter-spacing:-.03em}.footer{margin-top:56px;color:var(--dim);font-size:.9rem}@media(max-width:640px){.hero{padding-inline:16px}.hero__lead{font-size:1rem}.eyebrow{font-size:.68rem;letter-spacing:.18em}.cta{width:100%;max-width:320px}.hero__cta{width:100%}.section{padding-top:64px}}@media(prefers-reduced-motion:reduce){.scroll-hint{animation:none}}:root{color-scheme:light;--bg: #f6f5fb;--card: #ffffff;--field: #f3f1fa;--ink: #1d1a33;--muted: #6b6785;--primary: #5b3df5;--link: #5b3df5;--danger: #d6334a;--line: #e2dff0;--lime: #7cff67;--ok: #1f9d47;font-size:18px}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;padding-bottom:env(safe-area-inset-bottom);background:var(--bg);color:var(--ink);font-family:-apple-system,PingFang SC,Microsoft YaHei,sans-serif}a{color:var(--link)}.topbar{background:#fff;border-bottom:1px solid var(--line);padding:12px 20px;padding-top:calc(12px + env(safe-area-inset-top))}.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px}.topbar a{color:var(--ink);font-size:1.3rem;font-weight:700;text-decoration:none}.topbar nav{display:flex;gap:8px;align-items:center}.topbar nav a{font-size:1rem;padding:6px 12px;border-radius:999px}.topbar nav a.active{background:var(--field)}.topbar nav a.nav-add{border:1px solid var(--line)}.topbar nav a.nav-cta{background:var(--primary);color:#fff}.topbar nav a.nav-cta.active{background:#4227d6;color:#fff}.current-word{margin:12px 0}.current-word .term{font-size:3rem;font-weight:800;word-break:break-word}.settings label.check{display:flex;align-items:center;gap:10px}.settings label.check input{flex:none;width:24px;height:24px;min-width:0;min-height:0;padding:0}.pick{display:grid;gap:8px;margin-bottom:14px}.pick label{display:flex;gap:12px;align-items:center;padding:10px 12px;border:2px solid var(--line);border-radius:12px;font-weight:600;cursor:pointer}.pick label.on{border-color:var(--ok);background:#1f9d4714}.pick input[type=checkbox]{flex:none;width:24px;height:24px;min-width:0;min-height:0;padding:0}.pick .tag{margin-left:auto;font-weight:400;color:var(--muted);font-size:.9rem}.tag-lesson{font-size:.8rem;color:var(--muted);background:var(--field);border-radius:999px;padding:2px 8px;margin-left:8px}.container{max-width:900px;margin:0 auto;padding:16px}h1{font-size:1.6rem;margin:8px 0 16px}h2{font-size:1.25rem;margin:0 0 4px}.card{background:var(--card);border:2px solid var(--line);box-shadow:0 1px 3px #1d1a330d;border-radius:16px;padding:16px;margin-bottom:14px}.row{display:flex;flex-wrap:wrap;gap:10px;align-items:center}.row.spread{justify-content:space-between;margin-bottom:8px}.card .row.spread{margin-bottom:0}.center{text-align:center;justify-content:center}.muted{color:var(--muted)}.error{color:var(--danger);font-weight:600}input,select,textarea,button,.btn{font:inherit;padding:8px 14px;border-radius:10px;border:2px solid var(--line);background:var(--field);color:var(--ink)}input,textarea{flex:1;min-width:140px}textarea{width:100%;margin-bottom:8px}button,.btn{cursor:pointer;text-decoration:none;display:inline-block}button:hover:not(:disabled),.btn:hover{border-color:var(--link)}button:disabled,.btn.disabled{opacity:.45;cursor:not-allowed}.primary{background:var(--primary);border-color:var(--primary);color:#fff;font-weight:700}.danger{color:var(--danger)}button.danger.big-btn{border-color:var(--danger)}.big-btn{font-size:1.25rem;padding:14px 22px}.big{font-size:2.4rem;font-weight:800;margin:12px 0}progress{width:80%;height:18px}table.words{width:100%;border-collapse:collapse}.words th,.words td{text-align:left;padding:8px;border-bottom:1px solid var(--line)}.words .term{font-size:1.25rem;font-weight:700}.words .actions{white-space:nowrap;text-align:right}.words .actions button{padding:4px 10px;margin-left:4px}.settings{display:grid;gap:14px}.settings label{display:grid;gap:6px;font-weight:600}ol.result{font-size:1.6rem;line-height:2;padding-left:2rem}ol.result .muted{font-size:1rem}.controls{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;max-width:520px;margin:16px auto 0}.controls .big-btn{width:100%}.card-actions{gap:8px}@media(max-width:640px){:root{font-size:16px}.topbar{padding-left:12px;padding-right:12px;gap:8px}.topbar .brand-text{display:none}.topbar nav{gap:6px}.topbar nav a{font-size:.95rem;padding:6px 10px;white-space:nowrap}.container{padding:12px}.card{padding:14px;border-radius:14px}h1{font-size:1.35rem}input,select,textarea{font-size:16px;min-height:44px}button,.btn{min-height:44px;display:inline-flex;align-items:center;justify-content:center}.row>input,.row>select,.row>span.row{flex:1 1 100%}.row>button.primary,.row>.btn.primary{flex:1 1 100%}.row.spread{align-items:flex-start}.card-actions{width:100%}.card-actions>*{flex:1 1 calc(50% - 8px)}.big{font-size:2rem}progress{width:100%}.big-btn{font-size:1.1rem;padding:12px 16px;flex:1 1 100%}ol.result{font-size:1.4rem;padding-left:1.6rem}table.words,.words tbody,.words tr,.words td{display:block;width:100%}.words thead{display:none}.words tr{padding:10px 0;border-bottom:1px solid var(--line)}.words td{border:0;padding:2px 0}.words td:first-child{display:none}.words td input{width:100%;margin-bottom:6px}.words .actions{display:flex;gap:8px;margin-top:8px;text-align:left}.words .actions button{flex:1;margin:0;padding:8px 10px}}