:root{font-family:Inter,"Microsoft YaHei","PingFang SC",sans-serif;color:var(--studio-ink);background:color-mix(in srgb, var(--studio-accent) 2%, #fcfbfa);font-synthesis:none;scroll-behavior:smooth}

*{box-sizing:border-box}
body{margin:0}
a{color:inherit;text-decoration:none}
button,a{-webkit-tap-highlight-color:transparent}
button{font:inherit}
svg{stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}
a:focus-visible,button:focus-visible{outline:3px solid var(--studio-muted);outline-offset:5px}
button:disabled{opacity:.55;cursor:wait}

.skip-link{position:fixed;top:-60px;left:18px;z-index:10000;background:#fff;padding:12px 18px;border-radius:8px}
.skip-link:focus{top:10px}

.home-edition{display:flex;align-items:center;gap:7px;color:var(--studio-muted);font-size:12px;white-space:nowrap}
.home-edition>span{height:6px;width:6px;background:var(--studio-muted);border-radius:50%}
.home-help{padding:8px 12px;border:1px solid color-mix(in srgb, var(--studio-accent) 14%, white);border-radius:8px;font-size:12px;color:var(--studio-ink);white-space:nowrap}
.home-help span{margin-left:8px}

main{max-width:1440px;margin:auto;padding:24px 48px 0}
.hero{min-height:474px;background:#fff;border:1px solid color-mix(in srgb, var(--studio-accent) 14%, white);border-radius:24px;color:var(--studio-ink);display:grid;grid-template-columns:minmax(380px,.8fr) minmax(0,1.2fr);position:relative;overflow:hidden;padding:40px 44px 64px;isolation:isolate;box-shadow:0 16px 48px color-mix(in srgb,var(--studio-accent) 5%,transparent)}
.hero:before{content:"";position:absolute;z-index:-1;inset:0;background:radial-gradient(ellipse at 83% 30%,color-mix(in srgb,var(--studio-accent) 16%,white),transparent 63%),linear-gradient(110deg,#fffdf9 0%,#fff 42%,color-mix(in srgb,var(--studio-accent) 5%,white) 100%)}
.hero-grid{display:block;position:absolute;z-index:-1;inset:0;background-image:radial-gradient(color-mix(in srgb,var(--studio-accent) 18%,transparent) .75px,transparent .75px);background-size:20px 20px;mask-image:linear-gradient(90deg,transparent 25%,#000 100%);pointer-events:none}
.hero-copy{position:relative;z-index:2;align-self:center}
.eyebrow{font-size:10px;font-weight:600;letter-spacing:2.8px;color:var(--studio-muted);display:flex;align-items:center;gap:9px;margin:0 0 24px}
.sparkle{color:var(--studio-muted);font-size:18px}
h1{font-size:clamp(36px,4.25vw,62px);line-height:1.23;letter-spacing:-1.8px;margin:0 0 20px;font-weight:750}
h1>span{color:var(--studio-accent);position:relative;isolation:isolate}
h1>span:after{content:"";position:absolute;left:2%;right:3%;bottom:4%;height:17%;border-radius:40% 8% 38% 12%;background:color-mix(in srgb,var(--studio-accent) 13%,transparent);z-index:-1;transform:rotate(-1.5deg)}
.hero-description{font-size:14px;line-height:1.9;color:var(--studio-muted);margin:0 0 24px}
.hero-cta{display:inline-flex;align-items:center;gap:22px;background:var(--studio-accent);border:1px solid var(--studio-accent);border-radius:10px;padding:13px 19px;font-size:13px;font-weight:700;color:#fff;box-shadow:0 7px 18px color-mix(in srgb,var(--studio-accent) 18%,transparent);transition:background .2s,transform .2s}
.hero-cta:hover{background:color-mix(in srgb,var(--studio-accent) 85%,black);transform:translateY(-2px)}
.hero-cta svg{width:18px;height:18px}
.hero-modes{display:flex;gap:20px;margin-top:19px;color:var(--studio-muted);font-size:10px}
.hero-modes span{display:flex;align-items:center;gap:6px}
.hero-modes i{width:4px;height:4px;background:var(--studio-muted);border-radius:50%}
.hero-modes span+span i{background:var(--studio-muted)}
.hero-visual{min-width:0;position:relative;align-self:center}
.motion-stage{position:relative;width:100%;aspect-ratio:840/460}
.motion-stage #home-motion{position:absolute;inset:0}
.hero-bottom{position:absolute;bottom:0;left:44px;right:44px;display:flex;justify-content:space-between;align-items:center;height:42px;border-top:1px solid color-mix(in srgb, var(--studio-accent) 17%, white);color:var(--studio-muted);font-size:9px}
.hero-bottom>span:first-child{letter-spacing:2.7px}
.hero-bottom>span:last-child{letter-spacing:1px}
.hero-bottom>span:last-child span{margin-left:10px;color:var(--studio-muted);font-size:16px}

#motion-fallback{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
#motion-fallback[hidden]{display:none}

.ip-fallback-image{position:absolute;z-index:2;left:31.547619%;top:7.608696%;display:block;width:71.428571%;height:86.956522%;object-fit:contain}
.board-fallback{position:absolute;z-index:1;inset:0;display:block}
.board-fallback-image{position:absolute;inset:0;display:block;width:100%;height:100%;object-fit:contain;pointer-events:none}

.tools-section{padding-top:38px;scroll-margin-top:100px}
.section-heading{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:20px}
.section-kicker{font-size:10px;letter-spacing:2px;font-weight:700;color:var(--studio-muted);margin:0 0 9px}
.section-heading h2,.workflow h2{font-size:23px;letter-spacing:-.4px;margin:0;font-weight:700}
.section-note{font-size:11px;color:var(--studio-muted);white-space:nowrap;padding-bottom:3px}
.tools{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.tool-card{border:1px solid color-mix(in srgb, var(--studio-accent) 18%, white);border-radius:18px;padding:26px 28px 0;background:white;position:relative;overflow:hidden;--accent:var(--studio-accent);box-shadow:0 6px 24px color-mix(in srgb,var(--studio-accent) 4%,transparent);transition:transform .2s,box-shadow .2s,border-color .2s}
.tool-card:before{content:"";position:absolute;inset:0 0 auto;height:5px;background:var(--studio-accent);opacity:.7}
.tool-card.worksheet{background-image:linear-gradient(90deg,transparent 94%,color-mix(in srgb,var(--studio-accent) 4%,white) 94%);background-size:24px 100%}
.tool-card:hover{transform:translateY(-4px);box-shadow:0 16px 38px color-mix(in srgb, var(--studio-accent) 5%, transparent);border-color:var(--accent)}
.tool-card:after{content:"";position:absolute;right:-90px;top:-100px;width:300px;height:300px;border-radius:50%;background:radial-gradient(circle,color-mix(in srgb, var(--studio-accent) 8%, transparent),transparent 68%);pointer-events:none}
.card-top{display:flex;align-items:center;justify-content:space-between;position:relative;z-index:1}
.tool-icon{display:grid;place-items:center;width:44px;height:44px;border-radius:12px;background:color-mix(in srgb, var(--studio-accent) 24%, white);color:var(--studio-ink);box-shadow:0 6px 14px color-mix(in srgb, var(--studio-accent) 6%, transparent)}
.tool-icon svg{width:27px;height:27px}
.tool-type{display:flex;align-items:center;gap:15px;color:var(--studio-muted);font-size:9px;letter-spacing:1.7px;font-weight:600}
.tool-type b{font-size:16px;font-weight:500;letter-spacing:0;opacity:.5}
.card-content{display:flex;gap:14px;align-items:center;min-height:180px;position:relative;z-index:1}
.card-copy{flex:1;min-width:0}
.card-copy h3{font-size:30px;margin:18px 0 8px;color:var(--studio-ink);letter-spacing:-.8px}
.card-tagline{font-size:12px;margin:0 0 15px;font-weight:600;color:var(--studio-muted);line-height:1.6}
.card-description{font-size:11px;line-height:1.9;color:var(--studio-muted);margin:0}
.mini-paper{width:180px;min-width:140px;max-width:42%;padding:16px 14px;background:#fff;box-shadow:0 6px 18px color-mix(in srgb, var(--studio-accent) 4%, transparent);border:1px solid color-mix(in srgb, var(--studio-accent) 14%, white);border-radius:7px;position:relative;transform:rotate(-5deg);margin-top:18px;color:var(--studio-muted)}
.mini-paper-label{display:block;font-size:5px;letter-spacing:1.5px;color:color-mix(in srgb, var(--studio-accent) 40%, white)}
.mini-paper>strong{font-size:12px;display:block;margin-top:5px}
.mini-meta{display:flex;justify-content:space-between;font-size:5px;padding:10px 0 8px;border-bottom:1px solid color-mix(in srgb, var(--studio-accent) 12%, white)}
.mini-question{font-size:6px;margin-top:9px}
.practice-grid{display:flex;gap:5px;margin:7px 0}
.practice-grid i{display:block;width:19px;height:19px;border:1px solid color-mix(in srgb, var(--studio-accent) 24%, white);background:linear-gradient(90deg,transparent 48%,color-mix(in srgb, var(--studio-accent) 12%, white) 49%,color-mix(in srgb, var(--studio-accent) 12%, white) 51%,transparent 52%),linear-gradient(transparent 48%,color-mix(in srgb, var(--studio-accent) 12%, white) 49%,color-mix(in srgb, var(--studio-accent) 12%, white) 51%,transparent 52%)}
.mini-lines i{display:block;border-bottom:1px solid color-mix(in srgb, var(--studio-accent) 14%, white);height:12px}
.paper-seal{position:absolute;right:14px;top:17px;border:1px solid color-mix(in srgb, var(--studio-accent) 38%, white);color:color-mix(in srgb, var(--studio-accent) 38%, white);font-size:9px;width:19px;height:19px;border-radius:50%;display:grid;place-items:center}
.tags{display:flex;flex-wrap:wrap;gap:7px;margin:18px 0 22px;position:relative;z-index:1}
.tags span{font-size:10px;border:1px solid color-mix(in srgb, var(--studio-accent) 15%, white);background:color-mix(in srgb,var(--studio-accent) 7%,white);color:var(--studio-muted);padding:5px 8px;border-radius:5px}
.card-bottom{display:flex;align-items:center;justify-content:space-between;gap:10px;border-top:1px solid color-mix(in srgb, var(--studio-accent) 19%, white);padding:17px 0 19px}
.enter{display:flex;align-items:center;gap:20px;font-size:13px;font-weight:700;color:var(--accent)}
.enter>span{display:grid;place-items:center;border-radius:50%;background:color-mix(in srgb, var(--studio-accent) 36%, transparent);width:26px;height:26px;font-size:17px;transition:transform .2s}
.tool-card:hover .enter>span{transform:translate(2px,-2px)}
.formats{font-size:9px;color:var(--studio-muted);white-space:nowrap}
.lesson{background:linear-gradient(125deg,color-mix(in srgb,var(--studio-accent) 13%,white),color-mix(in srgb,var(--studio-accent) 5%,white));border-color:color-mix(in srgb, var(--studio-accent) 19%, white);--accent:var(--studio-accent)}
.lesson:after{background:radial-gradient(circle,color-mix(in srgb, var(--studio-accent) 9%, transparent),transparent 68%)}
.lesson .tool-icon{background:var(--studio-accent);color:#fff;box-shadow:0 6px 14px color-mix(in srgb, var(--studio-accent) 14%, transparent)}
.lesson .tool-type{color:var(--studio-muted)}
.lesson .card-copy h3{color:var(--studio-ink)}
.lesson .card-tagline{color:var(--studio-muted)}
.lesson .card-description{color:var(--studio-muted)}
.lesson .tags span{border-color:color-mix(in srgb, var(--studio-accent) 16%, white);color:var(--studio-muted)}
.lesson .card-bottom{border-color:color-mix(in srgb, var(--studio-accent) 16%, white)}
.lesson .formats{color:var(--studio-muted)}
.mini-lesson{width:180px;min-width:142px;max-width:42%;padding:14px 12px;background:color-mix(in srgb, var(--studio-accent) 15%, white);border:1px solid color-mix(in srgb, var(--studio-accent) 23%, white);border-radius:9px;box-shadow:0 6px 18px color-mix(in srgb, var(--studio-accent) 4%, transparent);transform:rotate(3deg);margin-top:18px}
.mini-lesson-title{display:flex;justify-content:space-between;font-size:10px;color:var(--studio-ink);font-weight:600;margin-bottom:13px}
.mini-lesson-title b{font-size:6px;border-radius:3px;background:color-mix(in srgb, var(--studio-accent) 7%, white);color:var(--studio-muted);padding:2px 4px}
.lesson-step{display:flex;align-items:center;gap:7px;margin:13px 0;position:relative}
.lesson-step:not(:last-child):after{content:"";position:absolute;left:10px;top:25px;width:1px;height:11px;background:color-mix(in srgb, var(--studio-accent) 13%, white)}
.lesson-step i{display:grid;place-items:center;width:21px;height:25px;border-radius:5px;background:color-mix(in srgb, var(--studio-accent) 6%, white);color:var(--studio-muted);font-size:8px;font-style:normal}
.lesson-step strong{display:block;font-size:8px;font-weight:600;color:var(--studio-ink)}
.lesson-step div>span{font-size:6px;display:block;color:var(--studio-muted);margin-top:4px}
.lesson-step>b{margin-left:auto;font-size:9px;color:var(--studio-muted)}

.workflow{display:grid;grid-template-columns:1fr 2fr;gap:40px;border-top:1px solid color-mix(in srgb, var(--studio-accent) 13%, white);border-bottom:1px solid color-mix(in srgb, var(--studio-accent) 13%, white);padding:34px 0;margin-top:38px;scroll-margin-top:110px}
.workflow-intro>p:last-child{font-size:11px;color:var(--studio-muted);margin:14px 0 0}
.workflow-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:25px;margin:0;padding:0;list-style:none}
.step-number{font-size:12px;color:var(--studio-muted);display:inline-flex;border:1px solid color-mix(in srgb, var(--studio-accent) 15%, white);border-radius:50%;width:28px;height:28px;align-items:center;justify-content:center;margin-bottom:10px}
.workflow-steps h3{font-size:12px;margin:0 0 8px;font-weight:650;color:var(--studio-muted)}
.workflow-steps p{font-size:10px;line-height:1.9;color:var(--studio-muted);margin:0}
.privacy-note{padding:26px 0;display:flex;gap:14px;align-items:flex-start;font-size:11px;color:var(--studio-muted);line-height:1.9}
.privacy-icon{display:grid;place-items:center;background:color-mix(in srgb, var(--studio-accent) 13%, white);min-width:35px;height:35px;border-radius:10px;color:var(--studio-muted)}
.privacy-icon svg{width:20px;height:20px}
.privacy-note h2{font-size:12px;color:var(--studio-muted);margin:0 0 5px;font-weight:600}
.privacy-note p{font-size:10px;margin:0 0 7px}
.privacy-note button{border:0;border-bottom:1px solid color-mix(in srgb, var(--studio-accent) 25%, white);background:none;padding:0 0 2px;color:var(--studio-muted);font-size:10px;cursor:pointer}
.privacy-note button>span{margin-left:7px}
.privacy-note #clearStatus{margin-left:16px;font-size:10px;color:var(--studio-muted)}
footer{max-width:1440px;margin:0 auto;padding:22px 48px 28px;display:flex;justify-content:space-between;align-items:center;gap:20px;border-top:1px solid color-mix(in srgb, var(--studio-accent) 12%, white);color:var(--studio-muted);font-size:10px}
footer>a:first-child{color:var(--studio-muted);font-size:12px;font-weight:700}
footer>a:first-child span{font-size:10px;color:var(--studio-muted);font-weight:400;margin-left:12px}
.back-top{color:var(--studio-muted)}

.lesson .card-bottom .enter{background:var(--studio-accent);color:#fff}

.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.hero-cta-lesson{background:#fff;border-color:var(--studio-line);color:var(--studio-accent);box-shadow:none}
.hero-cta-lesson:hover{background:var(--studio-soft)}
.hero-visual{width:100%;max-width:none;justify-self:center}
.card-bottom .enter{background:color-mix(in srgb, var(--studio-accent) 29%, white);color:var(--studio-ink);border-radius:8px;padding:8px 12px;gap:18px;font-size:12px}
.card-bottom .enter>span{background:color-mix(in srgb, var(--studio-accent) 24%, transparent);color:inherit;width:22px;height:22px;font-size:15px}
.tool-card .card-description{font-size:12px}
.tool-card .card-tagline{font-size:13px}
.hero{padding-top:30px;padding-bottom:54px}
.hero-bottom{height:38px}

@media(min-width:1650px){.hero{min-height:500px}
.hero-copy h1{font-size:64px}
}

@media(max-width:1100px){main{padding:20px 28px 0}
.hero{padding:32px 32px 56px;min-height:430px;grid-template-columns:1fr}
.hero-visual{max-width:780px;margin-top:18px}
.hero-bottom{left:32px;right:32px}
.hero-modes{gap:13px}
.tool-card{padding:22px 22px 0}
.card-copy h3{font-size:26px}
.card-content{gap:9px}
.mini-paper,.mini-lesson{min-width:120px;padding:12px 9px}
.card-tagline{font-size:11px}
.card-description{font-size:10px}
.tool-type{font-size:8px;letter-spacing:.9px;gap:10px}
.workflow{grid-template-columns:1fr;gap:24px}
.workflow-steps{gap:25px}
footer{padding:22px 28px}
.home-help{display:none}
}

@media(max-width:760px){main{padding:16px 18px 0}
.hero{grid-template-columns:1fr;padding:30px 26px 54px;border-radius:18px;gap:0}
.hero-copy{padding:0 0 5px}
.eyebrow{font-size:8px;letter-spacing:2px;margin-bottom:18px}
h1{font-size:46px}
.hero-description{font-size:12px}
.hero-modes{font-size:9px}
.hero-visual{margin:8px auto 0;width:100%;max-width:640px}
.hero-bottom{left:26px;right:26px;font-size:8px;height:36px}
.hero-bottom>span:first-child{letter-spacing:1.3px}
.hero-bottom>span:last-child{letter-spacing:0}
.hero-bottom>span:last-child span{margin-left:4px}
.section-heading{align-items:flex-start;gap:9px;flex-direction:column}
.section-heading h2{font-size:22px}
.section-note{font-size:10px}
.tools{grid-template-columns:1fr;gap:18px}
.tools-section{padding-top:28px}
.tool-card{padding:22px 23px 0}
.card-copy h3{font-size:29px}
.card-tagline{font-size:12px}
.card-description{font-size:11px}
.mini-paper,.mini-lesson{min-width:135px;width:180px;padding:13px 11px}
.card-content{gap:13px;min-height:175px}
.tags{margin-top:18px}
.workflow{margin-top:28px;padding:28px 0;gap:26px}
.workflow-steps{grid-template-columns:1fr;gap:20px}
.workflow-steps li{display:flex;align-items:flex-start;gap:14px}
.step-number{flex-shrink:0;margin:0}
.workflow-steps h3{font-size:13px}
.workflow-steps p{font-size:11px}
.privacy-note #clearStatus{display:block;margin:6px 0 0}
footer{margin:0 18px;padding:20px 0;flex-wrap:wrap;gap:13px}
footer>a:first-child{width:100%}
.home-edition{display:none}
.home-help{display:none}
}

@media(max-width:390px){.hero{padding-left:22px;padding-right:22px}
h1{font-size:42px}
.card-content{gap:8px}
.tool-card{padding:20px 19px 0}
.card-copy h3{font-size:27px}
.card-tagline{font-size:11px}
.card-description{font-size:10px}
.mini-paper,.mini-lesson{min-width:117px;padding:12px 8px}
.tool-type{letter-spacing:.8px;font-size:8px}
.hero-bottom>span:last-child{font-size:7px}
}

@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}
*,*:before,*:after{transition:none!important;animation:none!important}
.tool-card:hover,.hero-cta:hover{transform:none}
}

@media(max-width:480px){.hero-cta{padding:11px 13px;gap:12px;font-size:12px}
.hero-actions{gap:9px}
.tool-card .card-description{font-size:10px}
.tool-card .card-tagline{font-size:11px}
.card-bottom .enter{gap:10px;font-size:11px;padding:8px 10px}
.hero-visual{max-width:330px}
}

@media(max-width:600px){
.motion-stage{aspect-ratio:520/650}
.ip-fallback-image{left:9.615385%;top:49.230769%;width:90.384615%;height:48.205128%}
.hero-visual{max-width:430px}
}

@media print{.workspace-header,.hero,.privacy-note,footer{display:none}
main{padding:0}
.tool-card{break-inside:avoid}
}