:root{--brand: #2563eb;--brand-d: #1d4ed8;--brand-soft: #dbeafe;--paper: #fafaf9;--bg: var(--paper);--bg-soft: #f5f5f4;--card: #ffffff;--ink: #1c1917;--ink-2: #44403c;--fg: var(--ink);--muted: #57534e;--line: #e7e5e4;--border: var(--line);--grid: rgba(37, 99, 235, .16);--radius: 16px;--radius-sm: 11px;--radius-pill: 999px;--maxw: 1360px;--maxw-hero: 1520px;--space-1: 8px;--space-2: 16px;--space-3: 24px;--space-4: 40px;--space-5: 64px;--space-6: 104px;--font: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-num: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--tracking-display: -.02em;--shadow-sm: 0 1px 2px rgba(28, 25, 23, .06), 0 4px 14px -8px rgba(28, 25, 23, .18);--shadow-lg: 0 10px 30px -12px rgba(28, 25, 23, .22), 0 24px 60px -28px rgba(28, 25, 23, .28);--shadow-brand: 0 14px 40px -16px rgba(37, 99, 235, .5)}*{box-sizing:border-box}html,body{margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--font);color:var(--fg);background:var(--bg);line-height:1.72;font-size:16px;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;font-synthesis-weight:auto;text-spacing-trim:space-first;-webkit-text-size-adjust:100%;text-size-adjust:100%;overflow-x:hidden}a{color:var(--brand);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}header.site{position:sticky;top:0;z-index:50;background:#fafaf9d1;backdrop-filter:saturate(180%) blur(12px);-webkit-backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}.site-nav{display:flex;align-items:center;justify-content:space-between;padding:14px 24px;max-width:var(--maxw);margin:0 auto;flex-wrap:nowrap;gap:8px}.menu-toggle{display:none;width:42px;height:42px;margin-left:auto;padding:10px;border:1px solid var(--line);border-radius:var(--radius-sm);background:#fff;cursor:pointer}.menu-toggle span{display:block;height:2px;margin:4px 0;border-radius:2px;background:var(--ink)}.brand{font-weight:800;font-size:18px;letter-spacing:-.01em;color:var(--ink);display:inline-flex;align-items:center;gap:9px}.brand:hover{text-decoration:none}.brand .mark{width:14px;height:14px;border-radius:4px;background:var(--brand);display:inline-block;box-shadow:inset 0 0 0 3px #ffffffd9}.nav-links{display:flex;gap:22px;flex-wrap:nowrap;white-space:nowrap;font-size:14px}.nav-links a{color:var(--muted)}.nav-links a:hover{color:var(--ink);text-decoration:none}.lang-switch{display:inline-flex;align-items:center;gap:7px;margin-left:6px;padding:5px 12px;border:1px solid var(--line);border-radius:var(--radius-pill);background:#fff;font-size:13px;font-weight:700;white-space:nowrap}.lang-switch a{color:var(--muted);letter-spacing:.02em}.lang-switch a:hover{color:var(--ink);text-decoration:none}.lang-switch a.is-active{color:var(--brand-d);cursor:default}.lang-switch .sep{color:var(--line);font-weight:400}main{padding:0;min-height:60vh}footer.site{border-top:1px solid var(--line);padding:28px 20px;color:var(--muted);font-size:13px;background:var(--bg-soft)}footer .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}h1{font-size:clamp(34px,5.4vw,60px);line-height:1.08;letter-spacing:var(--tracking-display);margin:0 0 18px;font-weight:800}h2{font-size:clamp(24px,3.2vw,36px);line-height:1.16;letter-spacing:-.01em;margin:0 0 12px;font-weight:800}h3{font-size:18px;margin:0 0 8px;font-weight:700}p{margin:0 0 14px}.muted{color:var(--muted);font-size:15px}.text-brand{color:var(--brand)}html[lang^=zh] h1,html[lang^=zh] h2{letter-spacing:-.008em}html[lang^=zh] body{word-break:break-word}.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;background:var(--brand);color:#fff;border:1px solid transparent;border-radius:var(--radius-pill);padding:12px 24px;font-size:15px;font-weight:650;cursor:pointer;min-height:46px;transition:background .2s ease,transform .15s ease,box-shadow .25s ease,border-color .2s ease}.btn:hover{background:var(--brand-d);text-decoration:none;transform:translateY(-2px);box-shadow:var(--shadow-brand)}.btn:active{transform:translateY(0)}.btn:focus-visible{outline:3px solid var(--brand);outline-offset:3px}.btn.secondary,.btn-ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}.btn.secondary:hover,.btn-ghost:hover{background:var(--bg-soft);border-color:var(--muted);box-shadow:none}.btn-lg{padding:16px 34px;font-size:16px}.upload-dropzone{width:100%;min-height:190px;box-sizing:border-box;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;padding:28px 24px;border:2px dashed color-mix(in srgb,var(--brand) 42%,var(--line));border-radius:16px;background:color-mix(in srgb,var(--brand-soft) 58%,var(--paper));color:var(--ink);cursor:pointer;text-align:center;transition:border-color .2s ease,background .2s ease,box-shadow .2s ease}.upload-dropzone:hover{border-color:var(--brand);background:color-mix(in srgb,var(--brand-soft) 78%,var(--paper));box-shadow:0 8px 24px #2b5cdc1a}.upload-dropzone:focus-within{outline:3px solid var(--brand);outline-offset:3px}.upload-dropzone__icon{width:34px;height:34px;fill:none;stroke:var(--brand-d);stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.upload-dropzone__title{font-size:16px;font-weight:700}.upload-dropzone__formats,.upload-dropzone__limit{font-size:13px;line-height:1.5;color:var(--muted)}.btn:disabled{opacity:.5;cursor:not-allowed}.crop-deco{position:absolute;width:30px;height:30px;opacity:.55;pointer-events:none;z-index:0}.crop-deco:before,.crop-deco:after{content:"";position:absolute;background:var(--brand)}.crop-deco:before{left:0;top:14px;width:30px;height:2px}.crop-deco:after{top:0;left:14px;width:2px;height:30px}.crop-deco.tl{top:26px;left:26px}.crop-deco.tr{top:26px;right:26px}.crop-deco.br{bottom:26px;right:26px}.crop-deco.bl{bottom:26px;left:26px}.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:13px;font-weight:700;letter-spacing:.04em;color:var(--brand-d);background:var(--brand-soft);padding:7px 14px;border-radius:var(--radius-pill);margin:0 0 22px}.eyebrow:before{content:"";width:8px;height:8px;border-radius:2px;background:var(--brand)}.hero{position:relative;padding:clamp(48px,7vw,96px) 0 clamp(44px,6vw,84px);background:radial-gradient(130% 120% at 86% 6%,var(--brand-soft) 0%,rgba(255,228,230,0) 44%),var(--paper);overflow:hidden}.hero .container{max-width:var(--maxw-hero)}.hero-inner{display:grid;grid-template-columns:1fr 1.02fr;gap:56px;align-items:center}.hero-copy h1 .hl{color:var(--brand)}.hero-sub{font-size:clamp(16px,1.4vw,18.5px);color:var(--muted);max-width:33em;margin-bottom:8px}.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin:30px 0 24px}.hero-trust{list-style:none;display:flex;gap:22px;flex-wrap:wrap;padding:0;margin:0;font-size:14px;color:var(--muted)}.hero-trust li{display:inline-flex;align-items:center;gap:7px}.hero-trust svg{color:var(--brand);flex:none}.hero-visual{position:relative}.tool-mock{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-lg);overflow:hidden;animation:floatIn .9s cubic-bezier(.22,1,.36,1) both}@keyframes floatIn{0%{opacity:0;transform:translateY(22px) scale(.985)}to{opacity:1;transform:none}}.tool-mock__bar{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:12px 16px;border-bottom:1px solid var(--line);background:var(--bg-soft)}.tool-mock__file{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--ink-2);min-width:0}.tool-mock__file svg{flex:none;color:var(--muted)}.tool-mock__file span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.tool-mock__badge{flex:none;font-size:11px;font-weight:700;letter-spacing:.02em;color:var(--brand-d);background:var(--brand-soft);padding:4px 10px;border-radius:var(--radius-pill)}.tool-mock__stage{position:relative;display:grid;grid-template-columns:1fr 1fr;min-height:280px;background:#efeeec}.ba{position:relative;padding:30px 26px;display:flex;align-items:center;justify-content:center}.ba--before{background:#e9e8e6;filter:grayscale(.35) contrast(.92)}.ba--after{background:#f3f2f0}.ba__label{position:absolute;top:10px;left:12px;font-size:11px;font-weight:700;letter-spacing:.03em;color:var(--brand-d);background:#ffffffe6;border-radius:var(--radius-pill);padding:4px 8px}.ba--after .ba__label{color:var(--brand-d)}.comic{width:100%;aspect-ratio:3 / 4;max-height:220px;background:#fffdf8;border-radius:4px;box-shadow:0 6px 18px -10px #1c191766;display:grid;grid-template-columns:1fr 1fr;grid-template-rows:1.1fr .9fr;gap:5px;padding:6px;background-image:linear-gradient(#fff,#fff)}.comic>i{display:block;border-radius:3px;background:linear-gradient(135deg,#d7d4cf,#c4c0ba)}.comic>i:nth-child(1){grid-row:1;grid-column:1}.comic>i:nth-child(2){grid-row:1;grid-column:2}.comic>i:nth-child(3){grid-row:2;grid-column:1 / span 2;background:linear-gradient(135deg,#cfccc6,#b9b5af);position:relative}.comic>i:nth-child(3):after{content:"";position:absolute;right:14px;top:12px;width:34px;height:34px;border-radius:50%;background:#fff;box-shadow:0 2px 6px #00000026}.ba--before .comic{width:56%;box-shadow:0 0 0 18px #fffdf8,0 6px 18px -10px #1c191766;opacity:.95}.ba--after .comic{width:100%;box-shadow:0 0 0 5px var(--brand),0 8px 20px -10px #1c191766}.ba__cut{position:absolute;top:0;bottom:0;left:50%;width:2px;background:var(--brand);transform:translate(-1px);z-index:3}.ba__cut:after{content:"";position:absolute;top:50%;left:50%;width:12px;height:12px;border-radius:50%;background:var(--brand);transform:translate(-50%,-50%);box-shadow:0 0 0 4px #2563eb2e}.tool-mock__foot{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 16px;border-top:1px solid var(--line);flex-wrap:wrap}.toggle{display:inline-flex;align-items:center;gap:9px;font-size:13px;font-weight:600;color:var(--ink-2)}.toggle .sw{width:38px;height:22px;border-radius:var(--radius-pill);background:var(--brand);position:relative;flex:none}.toggle .sw:after{content:"";position:absolute;top:3px;right:3px;width:16px;height:16px;border-radius:50%;background:#fff}.toggle .check-mark{width:22px;height:22px;border-radius:50%;display:inline-grid;place-items:center;flex:none;color:#fff;background:var(--brand);font-size:14px;font-weight:800;line-height:1}.toggle.off .sw{background:#d6d3d1}.toggle.off .sw:after{right:auto;left:3px}.tool-mock__foot .btn{min-height:40px;padding:10px 18px;font-size:14px}.section{position:relative;padding:clamp(60px,8vw,104px) 0}.section-alt{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.how-section{isolation:isolate;overflow:hidden}.how-section:before{content:"";position:absolute;inset:0;z-index:0;pointer-events:none;opacity:.96;background:url(/images/reading-crop-comparison.png) center / cover no-repeat;filter:saturate(.78);animation:howBackdropMotion 10s ease-in-out infinite alternate;transform-origin:center}.how-section:after{content:"";position:absolute;inset:0;z-index:0;pointer-events:none;background:linear-gradient(90deg,#ffffff59,#ffffff1f,#fff0)}.how-section>.container,.how-section>.crop-deco{position:relative;z-index:1}@keyframes howBackdropMotion{0%{background-position:42% center;transform:scale(1.02)}to{background-position:58% center;transform:scale(1.08)}}.section-head{text-align:center;max-width:40em;margin:0 auto 52px;position:relative}.section-kicker{display:inline-block;font-size:12px;font-weight:800;letter-spacing:.14em;text-transform:uppercase;color:var(--brand);margin:0 0 14px}.section-title{margin-bottom:10px}.section-lead{color:var(--muted);font-size:17px;margin:0}.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}.feature{position:relative;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px 24px;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease}.feature:after{content:"";position:absolute;inset:0;border-radius:var(--radius);border:1.5px solid transparent;pointer-events:none;transition:border-color .25s ease}.feature:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}.feature:hover:after{border-color:var(--brand)}.feature .ico{width:46px;height:46px;border-radius:13px;background:var(--brand-soft);color:var(--brand-d);display:grid;place-items:center;margin-bottom:16px;transition:background .25s ease,color .25s ease}.feature:hover .ico{background:var(--brand);color:#fff}.feature h3{font-size:16px}.feature p{font-size:14px;color:var(--muted);margin:0}.steps{list-style:none;counter-reset:step;padding:0;margin:0;display:grid;grid-template-columns:repeat(3,1fr);gap:22px;position:relative}.steps:before{content:"";position:absolute;top:50px;left:16.66%;right:16.66%;height:2px;background:repeating-linear-gradient(to right,var(--line) 0 8px,transparent 8px 16px);z-index:0}.step{position:relative;z-index:1;padding:28px 24px 26px;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);transition:transform .25s ease,box-shadow .25s ease}.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-sm)}.step .num{width:44px;height:44px;border-radius:13px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:20px;font-weight:800;letter-spacing:-.02em;margin-bottom:16px;box-shadow:var(--shadow-brand)}.step h3{margin:0 0 6px}.step p{font-size:14px;color:var(--muted);margin:0}.format-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;max-width:760px;margin:0 auto 26px}.chip{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:16px 18px;border-radius:var(--radius-sm);border:1px solid var(--line);background:var(--card);font-weight:700;font-size:16px;color:var(--ink);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}.chip:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm)}.chip.active{background:var(--brand);color:#fff;border-color:var(--brand)}.chip .ext{font-size:11px;font-weight:700;opacity:.72;letter-spacing:.02em}.chip.soon{color:var(--muted);background:var(--bg-soft);border-style:dashed}.cta{position:relative;padding:clamp(70px,9vw,128px) 0;text-align:center;background:#edf3fb;color:var(--ink);overflow:hidden}.cta:before{content:"";position:absolute;inset:0;background:radial-gradient(80% 140% at 50% -10%,#2563eb52,#2563eb00 55%);pointer-events:none}.cta-inner{position:relative;max-width:40em;margin:0 auto}.cta h2{color:var(--ink);font-size:clamp(28px,4vw,44px)}.cta .muted{color:var(--muted);font-size:16px}.cta .btn{margin-top:14px}.card{border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin:16px 0;background:var(--bg-soft)}ul.clean{padding-left:20px}ul.clean li{margin:6px 0}.prose{max-width:760px;margin:0 auto;padding:clamp(40px,6vw,72px) 24px clamp(52px,7vw,92px)}.prose>:first-child{margin-top:0}.page-head{position:relative;text-align:center;padding:clamp(56px,8vw,96px) 24px clamp(36px,5vw,56px);margin-bottom:8px;overflow:hidden}.page-head__inner{max-width:860px;margin:0 auto;position:relative;z-index:1}.page-head--left .page-head__inner{text-align:left;margin-left:0}.page-head h1{margin:0 0 14px;font-size:clamp(32px,4.8vw,52px);line-height:1.12}.page-head__sub{margin:0 auto;max-width:60ch;color:var(--muted);font-size:clamp(15px,1.5vw,18px);line-height:1.7}.page-head--left .page-head__sub{margin-left:0}.doc-body{max-width:1080px;margin:0 auto;padding:0 24px clamp(56px,7vw,92px)}.doc-body--toc{display:grid;grid-template-columns:220px minmax(0,1fr);gap:48px;align-items:start}.doc-toc{position:sticky;top:96px;align-self:start;font-size:14px}.doc-toc__title{font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin:0 0 12px}.doc-toc ul{list-style:none;margin:0;padding:0;border-left:2px solid var(--line)}.doc-toc li a{display:block;padding:7px 14px;color:var(--muted);border-left:2px solid transparent;margin-left:-2px;line-height:1.45;transition:color .15s ease,border-color .15s ease}.doc-toc li a:hover,.doc-toc li a.is-active{color:var(--brand-d);border-left-color:var(--brand);text-decoration:none}.prose{max-width:760px;margin:0 auto}.doc-body--toc .prose{max-width:100%;margin:0}.doc-wide{max-width:960px;margin:0 auto;padding:0 0 clamp(56px,7vw,92px)}.prose h2{font-size:clamp(20px,2.4vw,25px);line-height:1.32;letter-spacing:-.01em;margin:46px 0 14px;padding-top:24px;border-top:1px solid var(--line)}.prose h2:first-of-type{border-top:none;padding-top:4px;margin-top:4px}.prose h3{font-size:18.5px;margin:30px 0 10px}.prose p{font-size:16.5px;line-height:1.88;color:var(--ink-2);margin:0 0 18px}.prose strong{color:var(--ink);font-weight:700}.prose a{font-weight:600}.prose ul,.prose ol{margin:0 0 22px;padding-left:0;list-style:none}.prose ul>li,.prose ol>li{position:relative;padding-left:28px;margin:11px 0;font-size:16.5px;line-height:1.82;color:var(--ink-2)}.prose ul>li:before{content:"";position:absolute;left:5px;top:13px;width:7px;height:7px;border-radius:2px;background:var(--brand)}.prose ol{counter-reset:li}.prose ol>li{counter-increment:li}.prose ol>li:before{content:counter(li);left:0;top:3px;width:21px;height:21px;border-radius:6px;background:var(--brand-soft);color:var(--brand-d);font-size:12px;font-weight:800;display:grid;place-items:center}.prose blockquote{margin:22px 0;padding:14px 18px;border-left:3px solid var(--brand);background:var(--bg-soft);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--muted)}.prose .card h2{border-top:none;padding-top:0;margin-top:0}.faq{border-top:1px solid var(--line);margin:8px 0 4px}.faq__item{border-bottom:1px solid var(--line)}.faq__q{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;text-align:left;background:none;border:none;cursor:pointer;padding:20px 4px;font:inherit;font-size:18px;font-weight:700;color:var(--ink);transition:color .15s ease}.faq__q:hover{color:var(--brand-d)}.faq__q::-webkit-details-marker{display:none}.faq__q::marker{content:""}.faq__q .ico{flex:none;width:22px;height:22px;color:var(--brand);transition:transform .25s ease}.faq__item[open] .faq__q .ico{transform:rotate(45deg)}.faq__a{padding:0 4px 22px;color:var(--ink-2);font-size:16px;line-height:1.85}.faq__a>:last-child{margin-bottom:0}.conv-hero{display:flex;align-items:center;gap:20px;flex-wrap:wrap;background:linear-gradient(180deg,var(--brand-soft),#fff);border:1px solid var(--line);border-radius:var(--radius);padding:22px 26px;margin:0 0 44px}.conv-badge{flex:none;min-width:64px;height:64px;padding:0 14px;border-radius:16px;background:var(--brand);color:#fff;display:grid;place-items:center;font-weight:800;font-size:18px;letter-spacing:-.02em;box-shadow:var(--shadow-brand);text-transform:uppercase}.conv-hero__txt{flex:1 1 240px}.conv-hero__txt h2{margin:0 0 4px;font-size:21px;border:none;padding:0}.conv-hero__txt p{margin:0;color:var(--muted);font-size:15px;line-height:1.6}.conv-hero .btn{flex:none}.tool-panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--card);box-shadow:var(--shadow-sm);overflow:hidden;margin:0 0 36px}.tool-sections{margin:0}.tool-panel .tool-section{margin:0;border:0;border-bottom:1px solid var(--line);border-radius:0;box-shadow:none;padding:clamp(20px,3vw,32px);background:transparent}.tool-panel .tool-section h3{font-size:19px;letter-spacing:-.01em}.tool-panel .tool-section>.muted{max-width:62em}.tool-panel .tool-progress,.tool-panel .tool-result{margin:0;border:0;border-top:1px solid var(--line);border-radius:0;box-shadow:none;padding:clamp(20px,3vw,32px);background:transparent}.tool-panel .tool-result{border-top-color:var(--brand-soft)}.tool-panel .btn.secondary{min-height:48px;padding-inline:18px}.tool-panel .select,.tool-panel .num{min-height:44px;box-sizing:border-box}.tool-panel .fmt-card,.tool-panel .quality-option{min-height:48px;box-sizing:border-box}.tool-panel .quality-option{border:1px solid var(--line);border-radius:var(--radius-sm);padding:10px 12px;background:#fff;cursor:pointer}.tool-panel .quality-option:first-child{border-radius:var(--radius-sm) 0 0 var(--radius-sm)}.tool-panel .quality-option:not(:first-child):not(:last-child){border-radius:0}.tool-panel .quality-option:last-child{border-right:1px solid var(--line);border-radius:0 var(--radius-sm) var(--radius-sm) 0}.tool-panel .quality-option:has(input:checked){color:var(--brand-d);background:var(--brand-soft);border-color:var(--brand)}.tool-panel .quality-option input{position:absolute;opacity:0;pointer-events:none}.tool-option-title{font-weight:600;color:var(--ink-2)}.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}.reveal.in{opacity:1;transform:none}@media (max-width: 940px){.hero-inner{grid-template-columns:1fr;gap:40px}.hero-visual{order:-1;max-width:520px;margin:0 auto;width:100%}.feature-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width: 760px){.site-nav{flex-wrap:wrap}.menu-toggle{display:block;order:1}.lang-switch{order:2;margin-left:8px}.nav-links{display:none;order:3;flex-basis:100%;width:100%;padding-top:10px;border-top:1px solid var(--line);flex-direction:column;gap:0}.site-nav.is-menu-open .nav-links{display:flex}.nav-links a{padding:10px 2px}.steps{grid-template-columns:1fr}.steps:before{display:none}.format-row{grid-template-columns:repeat(2,1fr)}}@media (max-width: 860px){.doc-body--toc{grid-template-columns:1fr;gap:8px}.doc-toc{position:static;top:auto;margin-bottom:20px}.doc-toc ul{border-left:none;display:flex;flex-wrap:wrap;gap:8px}.doc-toc li a{border-left:none;margin-left:0;border:1px solid var(--line);border-radius:var(--radius-pill);padding:6px 13px}.doc-toc li a.is-active{border-left-color:var(--brand)}.conv-hero{padding:18px 20px}}@media (max-width: 560px){.feature-grid,.format-row{grid-template-columns:1fr}.site-nav{padding:12px}.tool-mock__stage{min-height:230px}}@media (prefers-reduced-motion: reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}.reveal{opacity:1;transform:none}}.btn-donate{position:relative;background:linear-gradient(135deg,#e11d48,#f43f5e);color:#fff;border:none;font-weight:750;letter-spacing:.01em;box-shadow:0 10px 28px -10px #e11d4899;animation:donatePulse 1.5s ease-in-out infinite}.btn-donate:hover{background:linear-gradient(135deg,#be123c,#e11d48);color:#fff;text-decoration:none;transform:translateY(-2px);box-shadow:0 16px 38px -12px #e11d48b8}.btn-donate:active{transform:translateY(0)}.btn-donate .heart{margin-right:2px}@keyframes donatePulse{0%,to{box-shadow:0 10px 28px -10px #e11d4880}50%{box-shadow:0 0 0 9px #e11d4821,0 16px 38px -8px #e11d48b8}}.donate-cta{display:flex;flex-direction:column;align-items:center;gap:12px;margin:44px 0 6px;text-align:center}.donate-cta .btn-donate{font-size:17px;padding:15px 34px}.donate-cta .muted{margin:0}.qr-row{display:flex;gap:24px;flex-wrap:wrap;justify-content:center;margin:30px 0 6px}.qr{position:relative;width:210px;margin:0;text-align:center}.qr-placeholder{position:relative;aspect-ratio:1 / 1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:9px;border:2px dashed var(--line);border-radius:var(--radius-sm);background:var(--bg-soft);color:var(--muted)}.qr-placeholder svg{color:var(--brand);opacity:.85}.qr-placeholder span{font-weight:700;font-size:15px;color:var(--ink)}.qr-placeholder small{font-size:12px;color:var(--muted)}.qr-img{position:absolute;top:0;left:0;width:100%;aspect-ratio:1 / 1;height:auto;object-fit:contain;background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm)}.qr figcaption{margin-top:11px;font-weight:700;font-size:15px;color:var(--ink)}.donate-embed-row{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;align-items:start;margin:30px 0 8px}.donate-embed-row--single{grid-template-columns:minmax(0,350px);justify-content:center}.donate-widget{min-width:0;overflow:hidden;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--card)}.donate-widget h2{margin:0;padding:16px 18px 12px;font-size:18px;border-bottom:1px solid var(--line)}.donate-widget iframe{display:block;width:350px;max-width:100%;margin:0 auto}.donate-widget--crypto iframe{margin:0 auto}@media (max-width: 760px){.donate-embed-row{grid-template-columns:1fr}}.filelist{border:1px solid var(--line);border-radius:var(--radius-sm);background:#fff;overflow:hidden}.filelist__title{font-size:13px;font-weight:700;color:var(--muted);padding:10px 12px;border-bottom:1px solid var(--line);background:var(--bg-soft)}.filelist__clear{border:1px solid var(--line);border-radius:var(--radius-pill);padding:4px 10px;background:#fff;color:var(--brand-d);font:inherit;font-size:12px;cursor:pointer}.filelist__clear:hover{border-color:var(--brand);background:var(--brand-soft)}.filelist__clear:disabled{opacity:.5;cursor:not-allowed}.contact-page{max-width:720px;margin:0 auto;padding-bottom:clamp(72px,10vw,132px)}.contact-form{display:grid;gap:16px;margin-top:34px;padding:clamp(24px,4vw,36px);border:1px solid var(--line);border-radius:var(--radius);background:var(--card);box-shadow:var(--shadow)}.contact-form label{display:grid;gap:7px;color:var(--ink);font-weight:700;font-size:14px}.contact-form input,.contact-form textarea{width:100%;box-sizing:border-box;border:1px solid var(--line);border-radius:var(--radius-sm);padding:11px 12px;color:var(--ink);background:#fff;font:inherit;font-weight:400;resize:vertical}.contact-form input:focus-visible,.contact-form textarea:focus-visible{outline:3px solid var(--brand-soft);border-color:var(--brand)}.contact-form input[aria-invalid=true],.contact-form textarea[aria-invalid=true]{border-color:var(--brand-d);background:#fffaf9}.contact-form button[disabled]{cursor:wait;opacity:.68;transform:none}.contact-field__error{min-height:18px;color:var(--brand-d);font-size:13px;font-weight:500}.contact-form__status{min-height:22px;margin:0;font-size:14px}.contact-form__status.is-error{color:var(--brand-d)}.contact-form__status.is-success{color:#15803d}.filelist__row{display:flex;align-items:center;gap:10px;padding:8px 12px;border-bottom:1px solid var(--line)}.filelist__row:last-child{border-bottom:none}.filelist__name{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;font-size:14px;color:var(--ink)}.filelist__meta{font-size:12px;color:var(--muted);white-space:nowrap}.filelist__remove{flex:none;width:26px;height:26px;border-radius:50%;border:1px solid var(--line);background:#fff;color:var(--muted);font-size:16px;line-height:1;cursor:pointer;transition:border-color .15s,color .15s,background .15s}.filelist__remove:hover{border-color:var(--brand);color:var(--brand-d);background:var(--brand-soft)}.tag{flex:none;font-size:11px;font-weight:700;padding:2px 8px;border-radius:var(--radius-pill)}.tag--archive{color:var(--brand-d);background:var(--brand-soft)}.tag--image{color:#0f766e;background:#ccfbf1}.select{appearance:none;border:1px solid var(--line);border-radius:var(--radius-sm);padding:9px 12px;font-size:14px;font-family:inherit;background:#fff;color:var(--ink);min-width:220px}.select:focus-visible{outline:3px solid var(--brand);outline-offset:1px}.custom-size{display:inline-flex;align-items:center;gap:8px}.num{width:92px;border:1px solid var(--line);border-radius:var(--radius-sm);padding:8px 10px;font-size:14px;font-family:inherit}.margin-grid{display:grid;grid-template-columns:repeat(2,minmax(150px,1fr));gap:8px 12px;margin-top:8px;max-width:420px}.margin-field{display:flex;align-items:center;gap:7px;color:var(--muted);font-size:14px}.margin-field>span:first-child{width:32px;text-align:right}.margin-field .num{width:70px;padding:6px 8px}.quality-options{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;margin-top:8px}.quality-option{display:flex;align-items:center;gap:7px;color:var(--ink);font-size:14px;min-height:48px;justify-content:center;border:1px solid var(--line);border-right:0;padding:8px 12px;background:#fff;cursor:pointer}.quality-option:first-child{border-radius:var(--radius-sm) 0 0 var(--radius-sm)}.quality-option:last-child{border-right:1px solid var(--line);border-radius:0 var(--radius-sm) var(--radius-sm) 0}.quality-option:has(input:checked){color:var(--brand-d);background:var(--brand-soft);border-color:var(--brand)}.quality-option input{position:absolute;opacity:0;pointer-events:none}.current-file{margin:6px 0 0;font-weight:600;color:var(--ink);font-size:14px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.donelist{border-top:1px dashed var(--line);padding-top:8px}.donelist__title{font-size:12px;font-weight:700;color:var(--muted);margin-bottom:4px}.donelist ul{list-style:none;margin:0;padding:0;max-height:160px;overflow-y:auto}.donelist li{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-2);padding:3px 0}.donelist .check{color:#16a34a;font-weight:800;flex:none}.donelist__name{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.guide-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:0;margin:0 0 30px;padding:0 18px;position:relative}.guide-steps:before{content:"";position:absolute;top:21px;left:calc(16.66% + 18px);right:calc(16.66% + 18px);height:1px;background:var(--line)}.guide-step{display:flex;position:relative;z-index:1;flex-direction:column;align-items:center;gap:10px;padding:0 14px;text-align:center}.guide-step__num{flex:none;width:42px;height:42px;border-radius:50%;display:grid;place-items:center;font-weight:800;font-size:17px;color:#fff;background:var(--brand);box-shadow:var(--shadow-brand)}.guide-step__title{font-weight:700;font-size:15px;color:var(--ink);line-height:1.3}.guide-step__desc{font-size:13px;color:var(--muted);margin-top:2px;line-height:1.5}.fmt-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.fmt-card{position:relative;display:flex;flex-direction:column;gap:4px;border:1.5px solid var(--line);border-radius:var(--radius);padding:14px 16px;cursor:pointer;background:#fff;transition:border-color .15s,box-shadow .15s,transform .15s}.fmt-card:hover{border-color:var(--brand);transform:translateY(-1px)}.fmt-card.is-active{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft);background:var(--brand-soft)}.fmt-card__label{font-weight:800;font-size:15px;color:var(--ink)}.fmt-card.is-active .fmt-card__label{color:var(--brand-d)}.fmt-card__desc{font-size:12px;color:var(--muted);line-height:1.5}@media (max-width: 720px){.guide-steps,.fmt-grid{grid-template-columns:1fr}.guide-steps{gap:20px;padding:0}.guide-steps:before{display:none}.margin-grid,.quality-options{grid-template-columns:repeat(4,minmax(0,1fr))}.quality-options{display:grid}.quality-option{width:100%}.quality-option,.quality-option:first-child,.quality-option:last-child{border:1px solid var(--line);border-radius:var(--radius-sm);justify-content:flex-start}.select{width:100%;min-width:0}}