:root{--ink:#172e2c;--muted:#596964;--green:#183c39;--paper:#faf9f5;--cream:#f0eee5;--line:#dbdfd5;--accent:#dbe6a5;--serif:Georgia,'Times New Roman',serif;--sans:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',Arial,sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 var(--sans);-webkit-font-smoothing:antialiased}a{color:inherit;text-underline-offset:4px}button,input,textarea,select{font:inherit}button,a,input,textarea,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}img{max-width:100%;height:auto}h1,h2,h3,p{margin-top:0}h1,h2,h3{line-height:1.12;font-weight:400}h1,h2{font-family:var(--serif);letter-spacing:-.04em}h1{font-size:clamp(40px,5.1vw,70px);margin-bottom:28px}h2{font-size:clamp(32px,3.2vw,46px);margin-bottom:24px}h3{font-size:24px;letter-spacing:-.025em}h1 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1fr}.workspace>aside{order:-1;position:static!important}.workspace .field{margin-bottom:14px}.workspace .card{padding:20px}.section-title{display:block}.section-title p{overflow-wrap:anywhere}.project-heading h1{font-size:34px}.project-footer{flex-direction:column}.auth-page{padding-block:40px 60px}.auth-page .card{padding:26px}.auth-page h1{font-size:35px}.sample-frame{padding:20px}.prose h1{font-size:43px}.preview-image{padding:10px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}.button:hover{transform:none}}

/* 明确当前语言，保持触控区域与键盘焦点。 */
.language-switch{display:inline-flex;align-items:center;border:1px solid #b8c9c4;border-radius:7px;padding:3px;gap:2px;white-space:nowrap;font:500 12px/1.5 system-ui;flex-shrink:0}.language-switch a,.language-switch span{padding:6px 8px;border-radius:4px;text-decoration:none}.language-switch [aria-current=page]{background:#183c39;color:#fff}.language-switch a:focus-visible{outline:2px solid #183c39;outline-offset:2px}

/* 推送到 Kindle */
.kindle-form{margin-top:20px;padding-top:18px;border-top:1px solid var(--line,#d9dfd9)}
.kindle-form h3{margin:0 0 6px}
.kindle-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:10px}
.kindle-row input{flex:1 1 220px;min-width:0}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}

/* 价格页四栏 */
.pricing-grid-4{grid-template-columns:repeat(4,1fr)}
.pricing-grid .card.featured{border-color:var(--green);box-shadow:0 0 0 1px var(--green)}
@media(max-width:1050px){.pricing-grid-4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:760px){.pricing-grid-4{grid-template-columns:1fr}}