/* Crop 官网样式 —— 与 apps.slkass.com 同一家族：浅色、极简、黑白为主 */
:root{
  color-scheme:light dark;
  --paper:#f5f5f5;--ink:#161616;--muted:#6b6b6b;--line:#d8d8d8;
  --panel:#fff;--btn:#1d1d1d;--btn-hover:#393939;--btn-ink:#fff;
  --code-bg:#ececec;--radius:16px;
}
@media (prefers-color-scheme:dark){
  :root{
    --paper:#141414;--ink:#ededed;--muted:#9a9a9a;--line:#333;
    --panel:#1c1c1c;--btn:#ededed;--btn-hover:#fff;--btn-ink:#161616;
    --code-bg:#262626;
  }
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:24px}
body{margin:0;background:var(--paper);color:var(--ink);
  font:16px/1.8 -apple-system,BlinkMacSystemFont,'PingFang SC','Hiragino Sans','Apple SD Gothic Neo',sans-serif;
  -webkit-font-smoothing:antialiased}
a{color:inherit;text-underline-offset:4px}
img{max-width:100%;height:auto}
code{font:13px/1.6 ui-monospace,SFMono-Regular,Menlo,monospace;background:var(--code-bg);padding:2px 6px;border-radius:5px}
a:focus-visible,button:focus-visible,summary:focus-visible{outline:2px solid var(--ink);outline-offset:4px}
.wrap{width:min(1040px,calc(100% - 48px));margin:auto}
.mono{font:11px/1.5 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:1.6px;text-transform:uppercase;color:var(--muted)}

/* 顶栏 */
.top{height:80px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}
.wordmark{font-size:18px;font-weight:750;letter-spacing:-.6px;text-decoration:none;display:flex;align-items:center;gap:10px}
.mark{width:20px;height:20px;flex-shrink:0}
.top-links{display:flex;gap:26px;font-size:13px;align-items:center}
.top-links a{text-decoration:none}
.top-links a:hover{text-decoration:underline}

/* 首屏 */
.hero{padding:76px 0 60px}
.eyebrow{display:flex;gap:12px;align-items:center;font:11px/1.5 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:1.6px;color:var(--muted);text-transform:uppercase}
.eyebrow:before{content:'';height:5px;width:5px;background:var(--ink);flex-shrink:0}
.hero h1{font-size:clamp(40px,5.4vw,64px);letter-spacing:-2.5px;font-weight:650;line-height:1.18;margin:22px 0 22px}
.hero .lead{max-width:520px;font-size:15px;line-height:1.9;color:var(--muted);margin:0}
.hero-cta{display:flex;gap:20px;align-items:center;margin-top:30px;flex-wrap:wrap}
.primary{display:inline-flex;padding:10px 20px;background:var(--btn);color:var(--btn-ink);border:1px solid var(--btn);border-radius:6px;text-decoration:none;align-items:center;gap:16px;font-size:14px;font-weight:600}
.primary:hover{background:var(--btn-hover);border-color:var(--btn-hover)}
.text-link{font-size:13px;text-decoration:none}
.text-link:hover{text-decoration:underline}
.version-note{font:12px/1.5 ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--muted)}

/* 分节标签 */
.section-label{display:flex;justify-content:space-between;gap:16px;border-top:1px solid var(--line);padding:22px 0 16px;
  font:11px/1.4 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:1.4px;text-transform:uppercase;color:var(--muted)}

/* 功能网格 */
.features{display:grid;grid-template-columns:repeat(3,1fr);gap:13px;margin-bottom:64px}
.feature{border:1px solid var(--line);border-radius:var(--radius);padding:22px 22px;background:var(--panel)}
.feature svg{width:30px;height:30px;stroke:var(--ink);fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;display:block;margin-bottom:14px}
.feature h3{margin:0 0 6px;font-size:15px;font-weight:650;letter-spacing:-.2px}
.feature p{margin:0;font-size:13px;line-height:1.75;color:var(--muted)}
.feature .tag{display:inline-block;margin-top:10px;font:10px/1.6 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:1px;text-transform:uppercase;color:var(--muted);border:1px solid var(--line);border-radius:99px;padding:2px 9px}

/* 截图 */
.shots{display:grid;grid-template-columns:1fr 1fr;gap:13px;margin-bottom:64px}
.shot{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);overflow:hidden}
.shot.wide{grid-column:1/-1}
.shot figure{margin:0}
.shot img{display:block;width:100%}
.shot figcaption{padding:12px 18px;font-size:12px;color:var(--muted);border-top:1px solid var(--line)}
.shot .placeholder{display:flex;align-items:center;justify-content:center;min-height:220px;
  font:11px/1.6 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:1.4px;text-transform:uppercase;color:var(--muted);
  background:repeating-linear-gradient(45deg,transparent 0 10px,var(--code-bg) 10px 11px)}

/* 安装步骤与 FAQ */
.install{margin-bottom:64px}
.steps{counter-reset:step;list-style:none;margin:0;padding:0;display:grid;gap:13px}
.steps li{counter-increment:step;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);padding:20px 22px 20px 64px;position:relative;font-size:14px;line-height:1.8}
.steps li:before{content:counter(step,decimal-leading-zero);position:absolute;left:22px;top:22px;
  font:11px/1.6 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:1px;color:var(--muted)}
.steps p{margin:0 0 6px}
.steps p:last-child{margin-bottom:0}
.cmd{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:8px}
.cmd code{flex:1;min-width:260px;padding:8px 12px;overflow-x:auto;white-space:nowrap}
.copy-btn{font:11px/1 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:1px;text-transform:uppercase;
  border:1px solid var(--line);background:transparent;color:var(--muted);border-radius:5px;padding:8px 12px;cursor:pointer}
.copy-btn:hover{color:var(--ink);border-color:var(--ink)}
.faq{margin-bottom:64px}
.faq details{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);padding:0 22px;margin-bottom:11px}
.faq summary{cursor:pointer;padding:17px 0;font-size:14px;font-weight:600;letter-spacing:-.1px;list-style:none;display:flex;justify-content:space-between;gap:16px;align-items:center}
.faq summary:after{content:'+';font-weight:400;color:var(--muted)}
.faq details[open] summary:after{content:'–'}
.faq details p{font-size:13px;line-height:1.85;color:var(--muted);margin:0 0 16px}
.faq details p+p{margin-top:-8px}

/* 页脚 */
.bottom{border-top:1px solid var(--line);padding:30px 0 44px;display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;
  font:11px/1.7 ui-monospace,SFMono-Regular,Menlo,monospace;letter-spacing:1.2px;text-transform:uppercase;color:var(--muted)}
.bottom a{text-decoration:none}
.bottom a:hover{text-decoration:underline}

@media (max-width:820px){
  .features{grid-template-columns:1fr 1fr}
  .shots{grid-template-columns:1fr}
}
@media (max-width:560px){
  .wrap{width:calc(100% - 36px)}
  .features{grid-template-columns:1fr}
  .top-links{gap:16px}
  .hero{padding:56px 0 44px}
  .bottom{flex-direction:column}
}