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18px;border-bottom:1px solid rgb(255 255 255/.07)}.stage-bar>span{width:10px;height:10px;border-radius:50%;background:rgb(255 255 255/.14)}.stage-bar>b{margin:0 auto;padding:4px 14px;border-radius:999px;background:rgb(255 255 255/.06);font-family:var(--yk-font-mono);font-size:12px;font-weight:400;color:#8f8f8b;transform:translateX(-24px)}.stage-body{display:grid;height:clamp(300px,36vw,420px);padding:clamp(18px,3vw,36px);animation:scene-in .7s var(--yk-ease-out) both}.scene{display:grid;min-width:0;min-height:0;color:#e9e9e6}.scene-compress{grid-template-columns:minmax(0,1.3fr) minmax(0,1fr);align-items:center;gap:clamp(16px,3vw,36px)}.sc-photo{position:relative;height:100%;max-height:340px;border-radius:16px;background:linear-gradient(180deg,#ffd29c,#ff9a6a 38%,#e4577a 70%,#5b3a8c);overflow:hidden}.sc-sun{left:58%;top:30%;width:22%;aspect-ratio:1;background:#fff3d6;box-shadow:0 0 60px 20px rgb(255 240 200/.55)}.sc-hill,.sc-sun{position:absolute;border-radius:50%}.sc-hill{bottom:-30%}.sc-hill.a{left:-20%;width:90%;height:70%;background:#3a2463}.sc-hill.b{right:-30%;width:100%;height:58%;background:#1f1440}.sc-scan{position:absolute;top:0;bottom:0;left:0;width:2px;background:#fff;box-shadow:0 0 24px 6px rgb(255 255 255/.6),-60px 0 60px 30px rgb(255 255 255/.12);animation:scan 2.2s var(--yk-ease) .2s both}.sc-side{display:grid;gap:14px;padding:clamp(14px,2vw,22px);border:1px solid rgb(255 255 255/.08);border-radius:16px;background:rgb(255 255 255/.035);text-align:start}.sc-file{display:flex;align-items:center;gap:8px;font-size:13.5px;color:#d0d0cc;overflow:hidden;white-space:nowrap}.sc-file svg{color:var(--tone-image-glow);flex-shrink:0}.sc-row{display:flex;justify-content:space-between;font-size:13px;color:#8f8f8b}.sc-row b{font-family:var(--yk-font-mono);font-weight:500;color:#fff}.sc-slider{height:6px;margin-top:-6px;border-radius:99px;background:rgb(255 255 255/.12)}.sc-slider i{position:relative;display:block;height:100%;border-radius:99px;background:var(--tone-image-glow);animation:slide-quality 1.5s var(--yk-ease-out) .3s both}.sc-slider i:after{content:"";position:absolute;right:-7px;top:-5px;width:16px;height:16px;border-radius:50%;background:#fff;box-shadow:0 2px 8px rgb(0 0 0/.5)}.sc-sizes{display:flex;align-items:baseline;gap:10px;color:#8f8f8b}.sc-sizes s{font-family:var(--yk-font-mono);font-size:14px}.sc-sizes svg{align-self:center}.sc-sizes strong{font-size:clamp(1.5rem,3vw,2.2rem);font-weight:600;letter-spacing:-.03em;color:#fff;animation:yk-rise .6s var(--yk-ease-out) 1.5s both}.sc-done{display:flex;align-items:center;gap:8px;padding:9px 12px;border-radius:12px;background:rgb(74 222 156/.1);font-size:13px;font-weight:500;color:#7ee8b4;animation:yk-rise .6s var(--yk-ease-out) 2s both}.sc-done span{display:grid;place-items:center;width:20px;height:20px;border-radius:50%;background:#4ade9c;color:#06281a;flex-shrink:0}.scene-merge{grid-template-rows:1fr auto;justify-items:center;gap:14px}.sm-sheets{position:relative;width:100%}.sm-sheet{position:absolute;left:50%;top:50%;width:clamp(92px,13vw,132px);aspect-ratio:1/1.36;padding:12px;border-radius:10px;background:#f4f4f1;box-shadow:0 18px 40px rgb(0 0 0/.5);text-align:start;translate:-50% -50%}.sm-sheet b{display:block;margin-bottom:10px;font-family:var(--yk-font-mono);font-size:10px;color:var(--tone-pdf)}.sm-sheet i{display:block;height:5px;margin-top:7px;border-radius:3px;background:#d6d6d1}.sm-sheet i:last-child{width:55%}.sm-sheet.a{animation:merge-a 2.6s var(--yk-ease) .3s both}.sm-sheet.b{z-index:1;animation:merge-b 2.6s var(--yk-ease) .3s both}.sm-sheet.c{animation:merge-c 2.6s var(--yk-ease) .3s both}.sm-result{display:flex;align-items:center;gap:12px;font-family:var(--yk-font-mono);font-size:13.5px;color:#d0d0cc;animation:yk-rise .6s var(--yk-ease-out) 2.5s both}.sm-badge{padding:5px 12px;border-radius:999px;background:var(--tone-pdf-glow);font-weight:600;color:#2b0610}.scene-trim{grid-template-rows:1fr auto;gap:18px}.st-screen{position:relative;display:grid;place-items:center;border-radius:16px;background:radial-gradient(60% 80% at 80% 10%,rgb(255 255 255/.35),transparent 60%),linear-gradient(135deg,#1736a0,#4f7fff 55%,#a7c5ff);overflow:hidden}.st-play{display:grid;place-items:center;width:56px;height:56px;padding-inline-start:3px;border-radius:50%;background:rgb(255 255 255/.22);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);color:#fff;animation:play-pulse 2.2s ease-in-out infinite}.st-time{position:absolute;left:14px;bottom:12px;padding:4px 10px;border-radius:8px;background:rgb(0 0 0/.5);font-family:var(--yk-font-mono);font-size:12px;color:#fff}.st-strip{position:relative;display:grid;grid-template-columns:repeat(12,1fr);gap:2px;height:clamp(44px,6vw,62px);border-radius:10px;overflow:hidden}.st-strip>i{background:hsl(222 72% calc(26% + var(--f) * 3.6%))}.st-select{position:absolute;inset:0;border:3px solid #fff;border-radius:10px;box-shadow:0 0 0 999px rgb(0 0 0/.62);animation:trim 1.8s var(--yk-ease) .4s both}.st-head{position:absolute;top:0;bottom:0;left:22%;width:2px;background:#fff;opacity:0;animation:playhead 2s linear 2.2s both}.scene-audio{grid-template-rows:1fr auto;gap:18px}.sa-wave{display:flex;align-items:center;justify-content:center;gap:clamp(2px,.6vw,6px);min-height:0}.sa-wave i{flex:1;max-width:9px;height:var(--h);border-radius:99px;background:linear-gradient(180deg,var(--tone-audio-glow),#0d6f67);animation:wave 1.1s ease-in-out var(--d) infinite alternate}.sa-formats{display:flex;align-items:center;justify-content:center;gap:10px;color:#8f8f8b}.sa-formats span{padding:6px 14px;border:1px solid rgb(255 255 255/.14);border-radius:999px;font-family:var(--yk-font-mono);font-size:13px;color:#d0d0cc}.sa-formats span.on{border-color:var(--tone-audio-glow);background:var(--tone-audio-glow);font-weight:600;color:#032521;animation:format-pop .7s var(--yk-ease-out) .9s both}.scene-qr{grid-template-columns:minmax(0,1fr) auto;align-items:center;gap:clamp(18px,4vw,56px);padding:0 clamp(0px,4vw,60px)}.sq-input{display:flex;align-items:center;gap:10px;height:54px;padding:0 18px;border:1px solid rgb(255 255 255/.16);border-radius:14px;background:rgb(255 255 255/.05);color:var(--tone-daily-glow);overflow:hidden}.sq-input span{width:19ch;border-inline-end:2px solid #fff;font-family:var(--yk-font-mono);font-size:clamp(13px,1.5vw,16px);color:#fff;white-space:nowrap;overflow:hidden;animation:typing 1.5s steps(19) .3s both,caret .8s step-end infinite}.sq-code{display:block;width:clamp(140px,20vw,220px);aspect-ratio:1;border-radius:18px;background:#fff;box-shadow:0 20px 60px rgb(0 0 0/.5),0 0 0 1px rgb(255 255 255/.2)}.sq-code rect{fill:#0a0a0a;animation:qr-cell .42s var(--yk-ease-out) both}.ticker{display:flex;border-top:1px solid rgb(255 255 255/.08);background:#0a0a0a;overflow:hidden;mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent);-webkit-mask-image:linear-gradient(90deg,transparent,#000 12%,#000 88%,transparent)}.ticker ul{display:flex;flex-shrink:0;gap:40px;margin:0;padding:18px 40px 18px 0;list-style:none;animation:ticker 70s linear infinite}.ticker:hover ul{animation-play-state:paused}.ticker li{display:inline-flex;align-items:center;gap:9px;font-size:14.5px;font-weight:500;color:#a3a39f;white-space:nowrap}.ticker li svg{color:var(--tone-glow)}.stats{padding:clamp(48px,7vw,84px) 0 calc(clamp(56px, 8vw, 100px) + 40px);background:var(--yk-night);color:#fff}.stats-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin-top:0;margin-bottom:0}.stats-grid>div{display:flex;flex-direction:column-reverse;gap:6px;padding:4px 28px;border-inline-start:1px solid var(--yk-night-line)}.stats-grid>div:first-child{padding-inline-start:0;border-inline-start:0}.stats-grid dd{margin:0;font-size:clamp(2.8rem,7vw,5.5rem);font-weight:600;line-height:1;letter-spacing:-.05em;font-variant-numeric:tabular-nums}.stats-grid dt{font-size:14px;font-weight:500;color:var(--yk-night-muted)}.section{position:relative;padding:clamp(80px,11vw,150px) 0}.section-head{max-width:860px;margin-bottom:clamp(40px,5vw,64px)}.eyebrow{display:inline-flex;align-items:center;gap:12px;margin-bottom:20px;font-size:13px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--yk-muted)}.eyebrow:before{content:"";width:28px;height:2px;border-radius:2px;background:var(--yk-spectrum)}html:lang(ja) .eyebrow,html:lang(ko) .eyebrow,html:lang(zh-CN) .eyebrow{letter-spacing:.08em}.section-head h2{font-size:clamp(2.1rem,5.4vw,4.4rem);font-weight:600;line-height:1.04;letter-spacing:-.045em}html:lang(ja) .section-head h2,html:lang(ko) .section-head h2,html:lang(zh-CN) .section-head h2{font-size:clamp(1.9rem,4.6vw,3.6rem);font-weight:700;line-height:1.22;letter-spacing:-.015em}.section-lead{max-width:600px;margin-top:22px;font-size:clamp(1.02rem,1.4vw,1.18rem);color:var(--yk-muted)}.categories{margin-top:-40px;border-radius:40px 40px 0 0;background:var(--yk-bg)}.stack{display:grid;gap:24px}.stack-card-inner{position:relative;display:grid;grid-template-columns:minmax(0,.82fr) minmax(0,1.18fr);gap:clamp(28px,4vw,56px);padding:clamp(24px,4vw,52px);border:1px solid var(--yk-line);border-radius:32px;background:var(--yk-surface);box-shadow:0 1px 2px rgb(10 10 10/.04),0 30px 80px -30px rgb(10 10 10/.18);transform-origin:50% 0;overflow:hidden}.stack-card-inner:before{content:"";position:absolute;left:-180px;top:-200px;width:620px;height:620px;border-radius:50%;background:radial-gradient(closest-side,var(--tone-soft),transparent);pointer-events:none}.stack-copy{position:relative;display:flex;flex-direction:column;align-items:flex-start}.stack-index{display:flex;gap:8px;font-family:var(--yk-font-mono);font-size:13px;color:var(--yk-subtle)}.stack-index b{font-weight:600;color:var(--tone)}.stack-glyph{display:grid;place-items:center;width:68px;height:68px;margin:28px 0 24px;border-radius:21px;background:var(--tone);color:#fff;box-shadow:0 16px 34px -10px color-mix(in srgb,var(--tone) 70%,transparent),inset 0 1px 0 rgb(255 255 255/.3);transition:transform .5s var(--yk-ease-out)}.stack-card:hover .stack-glyph{transform:rotate(-6deg) scale(1.05)}.stack-copy h3{font-size:clamp(2.2rem,4.6vw,3.8rem);font-weight:600;line-height:1.02;letter-spacing:-.045em}html:lang(ja) .stack-copy h3,html:lang(ko) .stack-copy h3,html:lang(zh-CN) .stack-copy h3{font-weight:700;line-height:1.2;letter-spacing:-.01em}.stack-copy>p:not(.stack-index){max-width:380px;margin:16px 0 32px;font-size:1.06rem;color:var(--yk-muted)}.stack-copy .btn{margin-top:auto}.stack-tools{position:relative;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));align-content:start;gap:10px;margin:0;padding:0;list-style:none}.stack-tool{display:flex;align-items:center;gap:12px;height:100%;padding:12px 14px 12px 12px;border:1px solid var(--yk-line);border-radius:16px;background:var(--yk-bg);transition:border-color var(--yk-med) var(--yk-ease),background-color var(--yk-med) var(--yk-ease),box-shadow var(--yk-med) var(--yk-ease),transform var(--yk-med) var(--yk-ease)}.stack-tool:focus-visible,.stack-tool:hover{border-color:color-mix(in srgb,var(--tone) 45%,var(--yk-line));background:var(--yk-surface);box-shadow:0 10px 26px -12px color-mix(in srgb,var(--tone) 45%,transparent);transform:translateY(-2px)}.stack-tool-text{display:grid;flex:1;min-width:0}.stack-tool strong{font-size:15px;font-weight:600;line-height:1.35;color:var(--yk-ink)}.stack-tool small{font-size:12.5px;line-height:1.4;color:var(--yk-muted);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.stack-tool>svg{color:var(--yk-line-strong);flex-shrink:0;transition:color var(--yk-fast),transform var(--yk-med) var(--yk-ease)}.stack-tool:hover>svg{color:var(--tone);transform:translate(2px,-2px)}@media (min-width:1000px) and (min-height:700px){.stack{gap:40px;padding-bottom:20px}.stack-card{position:sticky;top:calc(96px + var(--i) * 16px)}.stack-card-inner{min-height:510px}}.features{border-top:1px solid var(--yk-line);background:var(--yk-surface)}.feature-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:0;padding:0;list-style:none}.feature-card{position:relative;display:flex;flex-direction:column;min-height:250px;padding:30px;border:1px solid var(--yk-line);border-radius:24px;background:var(--yk-bg);overflow:hidden;transition:border-color var(--yk-med) var(--yk-ease),transform .5s var(--yk-ease-out),box-shadow var(--yk-med) var(--yk-ease)}.feature-card:before{content:"";position:absolute;inset:0;background:radial-gradient(340px circle at var(--mx,50%) var(--my,0),rgb(10 10 10/.07),transparent 65%);opacity:0;transition:opacity var(--yk-med);pointer-events:none}.feature-card:hover{border-color:var(--yk-ink);transform:translateY(-4px);box-shadow:var(--yk-shadow-md);transition-delay:0s!important}.feature-card:hover:before{opacity:1}.feature-icon{display:grid;place-items:center;width:50px;height:50px;border-radius:15px;background:var(--yk-ink);color:#fff;transition:transform .5s var(--yk-ease-out)}.feature-card:hover .feature-icon{transform:rotate(-8deg) scale(1.08)}.feature-card h3{margin-top:auto;padding-top:44px;font-size:1.4rem;font-weight:600;letter-spacing:-.025em}.feature-card p{margin-top:8px;font-size:15px;color:var(--yk-muted)}.feature-number{position:absolute;top:30px;right:30px;font-family:var(--yk-font-mono);font-size:13px;color:var(--yk-subtle)}.steps{background:var(--yk-night);color:#fff;overflow:hidden}.steps .rain{opacity:.7}.steps .container{position:relative}.steps .section-head h2{color:#fff}.steps .eyebrow{color:var(--yk-night-muted)}.steps-line{height:1px;background:var(--yk-night-line)}.steps-line i{display:block;height:2px;margin-top:-1px;background:var(--yk-spectrum);transform-origin:0 50%}.steps-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0 40px;margin:0;padding:0;list-style:none}.steps-list li{position:relative;padding-top:40px}.steps-list li:before{content:"";position:absolute;top:-6px;left:0;width:11px;height:11px;border-radius:50%;background:#fff;box-shadow:0 0 0 5px rgb(255 255 255/.12)}.step-number{display:block;font-size:clamp(3.4rem,8vw,6.5rem);font-weight:600;line-height:1;letter-spacing:-.05em;color:transparent;-webkit-text-stroke:1px rgb(255 255 255/.34)}.steps-list h3{margin-top:22px;font-size:1.45rem;font-weight:600;letter-spacing:-.025em;color:#fff}.steps-list p{max-width:320px;margin-top:10px;color:var(--yk-night-muted)}.languages-grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);align-items:start;gap:clamp(32px,6vw,96px)}.languages .section-head{margin-bottom:0}.language-words{margin:0;padding:0;border-top:1px solid var(--yk-line-strong);list-style:none}.language-words button{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;padding:clamp(14px,2vw,24px) 4px;border:0;border-bottom:1px solid var(--yk-line-strong);background:transparent;font-size:clamp(2.2rem,5.6vw,4.6rem);font-weight:600;line-height:1.15;letter-spacing:-.04em;text-align:start;color:#c9c9c4;transition:color var(--yk-med) var(--yk-ease),padding-inline-start .5s var(--yk-ease-out)}.language-words button:hover{padding-inline-start:18px;color:var(--yk-ink-2)}.language-words button[aria-pressed=true]{color:var(--yk-ink)}.language-words svg{display:grid;width:44px;height:44px;padding:11px;border-radius:50%;background:var(--yk-ink);color:#fff;flex-shrink:0;opacity:0;transform:scale(.4);transition:opacity var(--yk-med),transform .5s var(--yk-ease-out)}.language-words button[aria-pressed=true] svg{opacity:1;transform:none}.faq{border-top:1px solid var(--yk-line)}.faq-layout{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);align-items:start;gap:clamp(32px,6vw,96px)}.faq .section-head{position:sticky;top:120px;margin-bottom:0}.faq-list{border-top:1px solid var(--yk-line-strong)}.faq-item{border-bottom:1px solid var(--yk-line-strong)}.faq-item h3{font-size:inherit}.faq-item button{display:flex;align-items:center;justify-content:space-between;gap:20px;width:100%;padding:26px 4px;border:0;background:transparent;font-size:clamp(1.08rem,1.6vw,1.3rem);font-weight:600;letter-spacing:-.015em;line-height:1.35;text-align:start;color:var(--yk-ink)}.faq-toggle{display:grid;place-items:center;width:38px;height:38px;border:1px solid var(--yk-line-strong);border-radius:50%;flex-shrink:0;transition:background-color var(--yk-med),color var(--yk-med),border-color var(--yk-med),transform .5s var(--yk-ease-out)}.faq-item button:hover .faq-toggle{border-color:var(--yk-ink)}.faq-item.is-open .faq-toggle{border-color:var(--yk-ink);background:var(--yk-ink);color:#fff;transform:rotate(45deg)}.faq-answer{display:grid;grid-template-rows:0fr;transition:grid-template-rows .5s var(--yk-ease-out)}.faq-item.is-open .faq-answer{grid-template-rows:1fr}.faq-answer>div{min-height:0;overflow:hidden}.faq-answer p{max-width:620px;padding:0 4px 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.tool-card-arrow{border-color:var(--yk-ink);background:var(--yk-ink);color:#fff;transform:rotate(45deg)}.tool-card strong{position:relative;z-index:1;font-size:16.5px;font-weight:600;line-height:1.3;letter-spacing:-.01em;color:var(--yk-ink)}.tool-card-desc{position:relative;z-index:1;margin-top:6px;font-size:14px;line-height:1.5;color:var(--yk-muted)}.empty-state{display:grid;justify-items:center;gap:8px;padding:64px 24px;border:1.5px dashed var(--yk-line-strong);border-radius:24px;background:var(--yk-surface);text-align:center;animation:yk-fade .24s var(--yk-ease)}.empty-icon{display:grid;place-items:center;width:60px;height:60px;margin-bottom:8px;border-radius:18px;background:var(--yk-ink);color:#fff}.empty-state h2{font-size:20px;font-weight:600;letter-spacing:-.02em;overflow-wrap:anywhere}.empty-state p{color:var(--yk-muted);margin-bottom:12px}.tool-page{animation:yk-rise .52s var(--yk-ease-out) both}.tool-header{display:flex;align-items:center;gap:16px;margin-bottom:20px}.tool-back{margin-inline-start:-8px;border-radius:999px!important;color:var(--yk-muted)}.tool-header .tool-glyph{width:54px;height:54px;border-radius:17px;box-shadow:0 14px 28px -12px color-mix(in srgb,var(--tone) 70%,transparent),inset 0 1px 0 rgb(255 255 255/.3)}.tool-title{flex:1;min-width:0}.tool-title h1{font-size:clamp(1.7rem,3.2vw,2.5rem);font-weight:600;line-height:1.1;letter-spacing:-.04em}html:lang(ja) .tool-title h1,html:lang(ko) .tool-title h1,html:lang(zh-CN) .tool-title h1{font-weight:700;line-height:1.25;letter-spacing:-.015em}.tool-title p{margin-top:4px;color:var(--yk-muted);font-size:15.5px}.tool-switcher{position:relative;margin:0 -32px 26px;padding:2px 32px 6px;overflow-x:auto;scrollbar-width:none}.tool-switcher::-webkit-scrollbar{display:none}.tool-switcher ul{gap:4px;margin:0;padding:4px;border:1px solid var(--yk-line);background:var(--yk-surface);list-style:none}.tool-switcher 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span{display:none}.tk-main{padding:26px 16px 40px}.tk-footer{padding:18px 16px calc(92px + env(safe-area-inset-bottom))}.directory-head{flex-direction:column;align-items:stretch;gap:20px;margin-bottom:22px}.directory-search{width:100%}.directory-search kbd{display:none}.category-tabs,.tool-switcher{margin-inline-start:-16px;margin-inline-end:-16px;padding-inline-start:16px;padding-inline-end:16px}.tool-group>header button{font-size:0;gap:0}.tool-group>header button svg{width:18px;height:18px}.tool-grid{grid-template-columns:1fr;gap:8px}.tool-card{display:grid;grid-template-columns:auto minmax(0,1fr);column-gap:14px;min-height:0;padding:14px;border-radius:18px}.tool-card-top{grid-row:span 2;align-self:center;margin:0}.tool-card-arrow{display:none}.tool-card-desc{margin-top:2px}.tool-header{gap:12px}.tool-header .tool-glyph{width:46px;height:46px;border-radius:14px}.tk-tabbar{position:fixed;left:0;right:0;bottom:0;z-index:30;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));padding:6px 6px calc(6px + env(safe-area-inset-bottom));border-top:1px solid var(--yk-line);background:rgb(255 255 255/.9);backdrop-filter:saturate(160%) blur(16px);-webkit-backdrop-filter:saturate(160%) blur(16px)}.tk-tabbar button{display:grid;justify-items:center;gap:3px;padding:4px 2px;border:0;background:transparent;font-size:11px;font-weight:500;line-height:1.2;color:var(--yk-subtle)}.tk-tabbar button span{max-width:100%;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.tk-tabbar button svg{width:52px;height:30px;padding:5px 16px;border-radius:999px;transition:background-color var(--yk-med),color var(--yk-med),transform .4s var(--yk-ease-out)}.tk-tabbar button:active svg{transform:scale(.9)}.tk-tabbar button[aria-current=page]{font-weight:650;color:var(--yk-ink)}.tk-tabbar button[aria-current=page] svg{background:var(--yk-ink);color:#fff}}