/* Shared accessibility and page primitives. No external fonts or runtime dependencies. */
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:108px}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;line-height:1.65;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}p{margin:0 0 1.2em;color:var(--muted)}img{max-width:100%;height:auto}button{font:inherit;cursor:pointer}button,a,summary{touch-action:manipulation}button:focus-visible,a:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:3px solid var(--accent);outline-offset:5px}h1,h2,h3{margin:0;color:var(--ink);line-height:1.24;font-weight:650;letter-spacing:-.045em}h1{font-size:clamp(2.8rem,4.5vw,4.5rem)}h2{font-size:clamp(2rem,3vw,3rem)}h3{font-size:1.35rem}em{font-style:normal}figure{margin:0}.container{width:min(1180px,calc(100% - 96px));margin-inline:auto}.skip-link{position:fixed;top:-100px;left:24px;z-index:100;background:var(--ink);color:var(--bg);padding:12px 22px}.skip-link:focus{top:10px}.site-header{position:sticky;top:0;z-index:20;background:var(--header);border-bottom:1px solid var(--line);backdrop-filter:blur(18px)}.nav-shell{display:flex;align-items:center;justify-content:space-between;min-height:88px;gap:24px}.brand{display:inline-flex;align-items:center;gap:11px;font-size:1.25rem;letter-spacing:-.03em;font-weight:750;flex-shrink:0}.brand img{border-radius:10px}#site-nav{display:flex;align-items:center;gap:30px;font-size:.875rem}#site-nav a:not(.nav-store){color:var(--muted)}#site-nav a:hover,#site-nav a[aria-current]{color:var(--ink)}.nav-store{padding:9px 18px;border:1px solid var(--line);border-radius:var(--radius)}.menu-button{display:none}.eyebrow{font-size:.7rem;letter-spacing:.15em;font-weight:650;color:var(--accent);margin-bottom:22px}.hero{display:grid;grid-template-columns:1.08fr 1fr;align-items:center;gap:56px;padding-block:92px 90px}.intro{font-size:1.05rem;line-height:1.85;margin:26px 0 30px}.actions{display:flex;align-items:center;gap:28px;flex-wrap:wrap}.button{display:inline-flex;align-items:center;justify-content:center;gap:30px;padding:16px 25px;border-radius:var(--radius);font-size:.9rem;font-weight:650;border:1px solid transparent;min-height:52px}.button:hover{transform:translateY(-2px)}.primary{background:var(--ink);color:var(--bg)}.text-link{font-size:.875rem;font-weight:550;text-decoration:underline;text-underline-offset:6px;text-decoration-color:var(--line)}.text-link:hover{text-decoration-color:currentColor}.compatibility{font-size:.75rem;color:var(--muted);margin:27px 0 0;line-height:1.8}.section{padding-block:96px}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:32px;margin-bottom:44px}.section-heading>.eyebrow{align-self:flex-start;margin-top:10px;min-width:110px}.section-heading>p:not(.eyebrow){font-size:.94rem;margin:0}.steps{list-style:none;padding:0;margin:0}.steps p{font-size:.9rem;margin:12px 0 0}.faq-list details,.support-content details{border-bottom:1px solid var(--line)}summary{list-style:none;cursor:pointer;padding:23px 36px 23px 0;position:relative;font-size:1rem;font-weight:550}summary::-webkit-details-marker{display:none}summary:after{content:'＋';position:absolute;right:4px;top:21px;font-size:1.25rem;color:var(--muted)}details[open]>summary:after{content:'−'}details>p{font-size:.93rem;max-width:900px;padding-right:20px}details a,.prose a:not(.button):not(.email-link),.contact-card p a{color:var(--accent);text-decoration:underline;text-underline-offset:4px}.download-section{display:flex;align-items:center;justify-content:space-between;gap:40px;padding:54px 56px;margin-bottom:96px;background:var(--panel);border-radius:var(--big-radius)}.download-section h2{font-size:2.3rem}.site-footer{border-top:1px solid var(--line);padding:48px 0 26px}.footer-main{display:flex;align-items:start;justify-content:space-between;gap:36px}.footer-main p{font-size:.85rem;margin:16px 0 0}.footer-main nav{display:grid;grid-template-columns:repeat(3,auto);gap:17px 32px;font-size:.8rem;color:var(--muted)}.footer-main nav a:hover{text-decoration:underline}.footer-bottom{display:flex;justify-content:space-between;gap:16px;margin-top:38px;padding-top:24px;border-top:1px solid var(--line);font-size:.7rem;color:var(--muted)}.document{padding-block:58px 90px;min-height:65vh}.document-heading{margin-bottom:44px}.document-heading .eyebrow{margin:35px 0 12px}.document-heading h1{font-size:clamp(2.5rem,4vw,3.6rem)}.back-link{font-size:.8rem;color:var(--muted)}.prose{max-width:820px}.prose h2{font-size:1.35rem;letter-spacing:-.025em;margin-bottom:20px;line-height:1.5}.prose h3{font-size:1.1rem;margin-bottom:16px}.prose p,.prose li{font-size:.94rem;line-height:1.95}.prose ul{padding-left:22px;color:var(--muted)}.prose li{padding-left:3px;margin-bottom:8px}.prose strong{color:var(--ink)}.legal-layout{display:grid;grid-template-columns:190px minmax(0,1fr);gap:74px}.legal-toc{display:flex;flex-direction:column;gap:14px;position:sticky;top:130px;align-self:start;font-size:.8rem;border-left:2px solid var(--line);padding-left:20px}.legal-toc>span{font-weight:650;color:var(--ink);margin-bottom:5px}.legal-toc a{color:var(--muted)}.legal-toc a:hover{color:var(--accent)}.legal-copy section{padding-top:24px;margin-bottom:14px}.document-date{font-size:.8rem!important;letter-spacing:.015em}.table-scroll{overflow-x:auto;margin-block:20px}table{width:100%;border-collapse:collapse;font-size:.8rem;min-width:560px}th,td{padding:14px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}th{background:var(--panel)}.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-block:38px}.contact-card{padding:32px;border:1px solid var(--line);border-radius:var(--big-radius);background:var(--surface)}.contact-card h2{font-size:1.5rem;margin-bottom:18px}.contact-card p{font-size:.93rem}.page-lead{font-size:1.15rem;line-height:1.8}.contact-channel{margin:20px 0;overflow-wrap:anywhere}.email-link{display:inline-block;font-weight:600;color:var(--accent);font-size:1rem}.copy-email{display:inline-block;background:transparent;color:var(--ink);border:1px solid var(--line);border-radius:5px;padding:7px 12px;margin:8px 0 8px 12px;font-size:.75rem}.copy-status{display:block;font-size:.75rem;color:var(--muted);min-height:1.5em}.contact-note{padding-top:24px}.developer-layout{display:grid;grid-template-columns:320px minmax(0,1fr);gap:70px}.developer-identity{padding:32px;background:var(--panel);border-radius:var(--big-radius);align-self:start}.developer-identity>img{border-radius:22px;margin-bottom:24px}.developer-identity h2{font-size:2rem}.developer-identity p{margin-block:16px 28px;font-size:.9rem}.developer-identity .button{padding:12px 20px}.info-list{margin:28px 0 30px}.info-list>div{display:grid;grid-template-columns:130px 1fr;border-bottom:1px solid var(--line);padding-block:15px;font-size:.85rem}.info-list dt{color:var(--muted)}.info-list dd{margin:0}.help-topics{display:flex;flex-wrap:wrap;gap:12px;margin:32px 0 48px}.help-topics a{border:1px solid var(--line);padding:10px 18px;border-radius:var(--radius);font-size:.85rem}.help-topics a:hover{background:var(--panel)}.support-content{max-width:870px}.support-content section{margin-bottom:44px}.support-content h2{font-size:1.5rem;margin-bottom:12px}.support-callout{margin-top:60px;padding:38px;background:var(--panel);border-radius:var(--big-radius);max-width:870px}.support-callout h2{font-size:1.6rem}.support-callout p{margin:12px 0 24px}.muted{color:var(--muted)}
@media(min-width:1450px){.hero{padding-block:110px}.intro{font-size:1.1rem}}
@media(max-width:1000px){.container{width:calc(100% - 56px)}.hero{gap:32px;padding-block:62px}.hero h1{font-size:3rem}.intro{font-size:.94rem}.actions{gap:18px}.section-heading{flex-wrap:wrap}.legal-layout{gap:35px;grid-template-columns:160px 1fr}.developer-layout{grid-template-columns:260px 1fr;gap:40px}.footer-main nav{grid-template-columns:repeat(2,auto)}.download-section{padding:42px}}
@media(max-width:760px){html{scroll-padding-top:90px}.container{width:calc(100% - 40px)}.nav-shell{min-height:72px}.brand{font-size:1.1rem}.brand img{width:32px;height:32px}.menu-button{display:block;background:none;border:1px solid var(--line);padding:8px 13px;border-radius:6px;color:var(--ink);font-size:.85rem}.menu-button span{margin-left:12px}#site-nav{display:none;position:absolute;left:0;right:0;top:72px;background:var(--bg);border-bottom:1px solid var(--line);padding:20px;box-shadow:0 15px 22px #0000000a;gap:0;align-items:stretch;flex-direction:column}#site-nav.is-open{display:flex}#site-nav>a{padding:13px 18px}#site-nav .nav-store{margin-top:10px}.hero{grid-template-columns:1fr;padding-block:50px 46px;gap:46px}.hero h1{font-size:clamp(2.75rem,8vw,3.7rem)}.intro{font-size:1rem}.compatibility{margin-top:23px}.eyebrow{font-size:.65rem}.hero-copy{max-width:570px}.section{padding-block:60px}.section-heading{display:block;margin-bottom:32px}.section-heading h2{margin-bottom:20px}.section-heading>.eyebrow{margin-bottom:12px}.section-heading>p:not(.eyebrow){font-size:.9rem}.download-section{padding:32px;flex-direction:column;align-items:start;margin-bottom:60px}.download-section h2{font-size:2rem}.footer-main{flex-direction:column;gap:32px}.footer-main nav{grid-template-columns:repeat(3,auto);gap:16px 24px}.footer-bottom{font-size:.65rem;flex-wrap:wrap}.document{padding-block:32px 58px}.document-heading{margin-bottom:30px}.legal-layout{display:block}.legal-toc{position:static;display:flex;flex-direction:row;flex-wrap:wrap;gap:12px 20px;border:1px solid var(--line);border-radius:var(--radius);padding:18px;margin-bottom:30px}.legal-toc>span{width:100%;margin-bottom:0}.prose p,.prose li{font-size:.9rem}.contact-grid{grid-template-columns:1fr}.contact-card{padding:25px}.developer-layout{grid-template-columns:1fr;gap:38px}.developer-identity{display:block}.info-list>div{grid-template-columns:110px 1fr}.help-topics{gap:8px}.help-topics a{padding:9px 14px;font-size:.78rem}.support-callout{padding:26px}}
@media(max-width:380px){.actions{gap:18px}.actions .button{width:100%}.footer-main nav{grid-template-columns:repeat(2,auto)}.hero h1{font-size:2.6rem}.download-section{padding:25px}.container{width:calc(100% - 32px)}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}.button:hover{transform:none}}

/* Caihong: warm paper, editorial collage and a colorful creative toolbox. */
:root{--bg:#faf6ed;--surface:#fffdf8;--ink:#352b36;--muted:#716676;--accent:#715080;--line:#ded7cd;--panel:#f0e8da;--header:#faf6edef;--radius:7px;--big-radius:10px}
h1,h2{font-weight:750;letter-spacing:-.06em}.hero{grid-template-columns:1.15fr 1fr;padding-block:86px 78px;gap:32px}.hero h1{font-size:clamp(2.8rem,4.4vw,4.5rem);line-height:1.3}.hero .eyebrow{color:#796279}.color-word{display:inline-block;position:relative;white-space:nowrap}.color-word svg{position:absolute;bottom:-10px;left:0;width:100%;height:21px;fill:none;stroke:#e09b43;stroke-width:7;stroke-linecap:round}.intro{margin-top:36px}.button.primary{background:#403347;color:#fffdf6;box-shadow:3px 3px 0 #c6b6d2;border:1px solid #403347}.button.primary:hover{box-shadow:4px 5px 0 #c6b6d2}.collage-stage{height:480px;position:relative}.collage{position:relative;height:100%;width:100%}.paper{position:absolute;padding:16px;background:#fffdf9;border:1px solid #e1d9cf;box-shadow:0 10px 20px #4b383011}.photo-paper{width:72%;left:0;top:22px;transform:rotate(-8deg);border-radius:2px}.paper-tape{position:absolute;left:38%;top:-14px;width:88px;height:25px;background:#e8cca8b3;transform:rotate(6deg);z-index:2}.paper-picture{height:232px;position:relative;overflow:hidden;background:#e7b7b0}.picture-sun{position:absolute;width:70px;height:70px;background:#fbe5a6;border-radius:50%;top:30px;left:35%}.picture-hill{position:absolute;bottom:-60px;width:125%;height:205px;border-radius:100% 100% 0 0}.hill-one{background:#b093ba;left:-60px;transform:rotate(20deg)}.hill-two{background:#4f786a;left:75px;bottom:-100px;transform:rotate(-20deg)}.watermark{position:absolute;bottom:22px;right:17px;color:#fff;font-size:.7rem;letter-spacing:.15em;font-weight:650}.photo-paper p{margin:16px 0 1px;font-size:.8rem;color:var(--ink);font-weight:600}.photo-paper p span{display:block;font-size:.5rem;color:var(--muted);letter-spacing:.12em;margin-top:7px}.type-paper{width:60%;right:-4px;bottom:52px;background:#e1d5eb;padding:24px;transform:rotate(8deg);border-color:#c5b5d6}.type-paper>span{font-size:.55rem;letter-spacing:.08em;color:#716177}.type-paper strong{display:block;font-size:1.65rem;letter-spacing:-.04em;line-height:1.35;margin:14px 0 22px}.type-paper p{font-size:.67rem;margin:20px 0 0;color:#60546a}.selection{border:1px solid #755e94;position:relative;padding:5px 13px;font-size:.9rem;width:max-content;max-width:100%;letter-spacing:.15em}.selection i{position:absolute;width:6px;height:6px;background:#fff;border:1px solid #755e94}.selection i:nth-child(1){left:-3px;top:-3px}.selection i:nth-child(2){right:-3px;top:-3px}.selection i:nth-child(3){left:-3px;bottom:-3px}.selection i:nth-child(4){right:-3px;bottom:-3px}.sticker{position:absolute;z-index:4}.sticker-yellow{font-size:5.8rem;color:#e4b443;line-height:1;right:-4px;top:8px;transform:rotate(15deg)}.sticker-pink{left:-8px;bottom:54px;border-radius:50%;width:92px;height:92px;background:#eaa9aa;color:#71464e;display:grid;place-content:center;text-align:center;font-size:.68rem;letter-spacing:.05em;line-height:1.4;border:1px solid #dd989d;transform:rotate(-17deg)}.collage-caption{position:absolute;bottom:0;right:8px;font-size:.62rem;color:var(--muted)}.color-strip{display:flex;height:13px;border-block:1px solid #352b361f}.color-strip span{flex:1}.color-strip span:nth-child(1){background:#dca0a6}.color-strip span:nth-child(2){background:#e5bb73}.color-strip span:nth-child(3){background:#bfd0b5}.color-strip span:nth-child(4){background:#a9c4d2}.color-strip span:nth-child(5){background:#c7b4dc}.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.tool-card{border-radius:8px;border:1px solid #352b3615;padding:28px;overflow:hidden}.tool-lavender{background:#e4daee}.tool-orange{background:#f0dfc4}.tool-green{background:#dfe9d7}.tool-top{display:flex;align-items:center;justify-content:space-between;font-size:.62rem;letter-spacing:.04em;margin-bottom:30px}.tool-top>span:last-child{font-size:2rem;font-weight:400;line-height:1}.tool-card h3{font-size:1.35rem;margin-bottom:16px;font-weight:650}.tool-card p{font-size:.85rem;line-height:1.9;min-height:78px;color:#615967}.watermark-demo{background:#f4eef8;transform:rotate(-3deg);padding:20px 15px;margin-top:28px;border:1px solid #c9b7dd;border-radius:2px}.watermark-demo>span{display:block;font-size:.55rem;letter-spacing:.11em;color:#82718d;margin-bottom:11px}.watermark-demo strong{font-size:.85rem;font-weight:550}.timeline{display:flex;gap:5px;padding:15px 9px 30px;border:2px solid #b48045;position:relative;margin-top:36px;background:#f8ecda;border-radius:5px}.timeline i{display:block;flex:1;height:38px;background:#dec292;border-radius:2px}.timeline i:nth-child(even){background:#b69c79}.timeline>span{position:absolute;bottom:6px;left:0;right:0;text-align:center;font-size:.5rem;letter-spacing:.16em;color:#855e39}.edit-tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:36px}.edit-tags span{border:1px solid #a8bea0;background:#f2f7ed;font-size:.7rem;padding:6px 10px;border-radius:5px}.extras{padding-block:8px 80px}.extras h2{font-size:1.65rem}.extras ul{display:flex;flex-wrap:wrap;list-style:none;padding:0;gap:12px;margin:25px 0}.extras li{padding:8px 16px;border:1px solid var(--line);border-radius:999px;font-size:.85rem}.extras>p:last-child{font-size:.74rem;margin:0}.workflow{background:#f1ebe0;padding-block:76px;border-block:1px solid var(--line)}.workflow .section-heading{align-items:end}.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:60px;padding-top:16px}.steps li>span{display:grid;place-content:center;width:42px;height:42px;border-radius:50%;background:#e0d1e8;font-size:1.05rem;margin-bottom:25px}.steps li:nth-child(2)>span{background:#eddbb3}.steps li:nth-child(3)>span{background:#d5e2cd}.steps h3{font-size:1.25rem}.steps p{max-width:260px}.faq-section .faq-list{max-width:880px}.download-section{position:relative;background:#e5dbef;overflow:hidden}.download-star{position:absolute;color:#cdb9df;font-size:16rem;line-height:1;right:36%;top:0;pointer-events:none}.download-section>div,.download-section>a{position:relative}.site-footer{background:#f1ebe0}.contact-card:first-child{background:#f4e9d9}.contact-card:nth-child(2){background:#ece3f2}.document-heading{padding-bottom:32px;border-bottom:1px solid var(--line)}.developer-identity{background:#e4daee}.support-callout{border:1px solid #d8cddf;background:#ece3f2}
@media(max-width:1000px){.hero h1{font-size:3.1rem}.collage-stage{height:430px}.paper-picture{height:195px}.type-paper{padding:20px}.type-paper strong{font-size:1.4rem}.sticker-yellow{font-size:4.7rem}.sticker-pink{width:80px;height:80px;font-size:.57rem;bottom:46px}.tool-card{padding:22px}.tool-card h3{font-size:1.15rem}.tool-grid{gap:15px}.steps{gap:35px}.tool-card p{min-height:95px}.download-star{right:29%}}
@media(max-width:760px){.hero{padding-block:50px 44px;gap:35px;grid-template-columns:1fr}.hero h1{font-size:clamp(2.55rem,7.8vw,3.6rem)}.color-word svg{height:14px;bottom:-8px}.intro{margin-top:30px}.collage-stage{height:430px;max-width:430px;width:calc(100% - 20px);margin:auto}.photo-paper{left:8px}.paper-picture{height:205px}.type-paper{right:0;bottom:38px;padding:20px}.type-paper strong{font-size:1.5rem}.sticker-yellow{font-size:5rem;right:-7px}.sticker-pink{left:-4px;bottom:42px}.tool-grid{grid-template-columns:1fr;gap:18px}.tool-card{padding:28px}.tool-card h3{font-size:1.4rem}.tool-card p{min-height:0;max-width:380px}.watermark-demo,.timeline,.edit-tags{margin-top:25px;max-width:300px}.tool-top{margin-bottom:22px}.workflow{padding-block:50px}.steps{grid-template-columns:1fr;gap:35px;padding-top:0}.steps li{position:relative;padding-left:66px;min-height:80px}.steps li>span{position:absolute;left:0;top:3px;margin:0}.steps p{max-width:none}.extras{padding-block:0 55px}.extras ul{gap:8px}.extras li{font-size:.75rem;padding:7px 13px}.download-star{font-size:12rem;right:-20px;top:0}.download-section .button{align-self:start}}
@media(max-width:380px){.hero h1{font-size:2.4rem}.collage-stage{height:370px}.paper-picture{height:165px}.type-paper{padding:17px}.type-paper strong{font-size:1.3rem}.photo-paper p{font-size:.7rem}.sticker-pink{width:68px;height:68px;font-size:.5rem}}