@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@500;700;900&family=Noto+Sans+SC:wght@300;400;500;700&family=Spline+Sans+Mono:wght@500;600&display=swap');

:root{
  --paper:#FBF9F3; --surface:#FFFFFF; --paper2:#F4EEE1;
  --ink:#1B1714; --ink2:#5E574C; --muted:#978E7C; --rule:#E8E1D1;
  --accent:#D14424; --accent2:#B5361B; --accent-soft:#F8E8DF;
  --deep:#17120F; --deep2:#221B16;
  --r:12px; --r-sm:8px;
  --sh1:0 1px 2px rgba(40,30,15,.05);
  --sh2:0 4px 16px rgba(40,30,15,.07);
  --sh3:0 14px 40px rgba(40,30,15,.12);
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-font-smoothing:antialiased;scroll-behavior:smooth}
body{background:var(--paper);color:var(--ink);font-family:"Noto Sans SC",sans-serif;line-height:1.7;font-weight:400}
a{color:inherit}
.wrap{max-width:1040px;margin:0 auto;padding:0 32px}
.serif{font-family:"Noto Serif SC",serif}
.mono{font-family:"Spline Sans Mono",monospace;font-variant-numeric:tabular-nums}

/* 顶栏 */
.top{position:sticky;top:0;z-index:50;background:rgba(251,249,243,.85);backdrop-filter:saturate(160%) blur(10px);border-bottom:1px solid var(--rule)}
.top .wrap{display:flex;justify-content:space-between;align-items:center;padding:15px 32px;max-width:1040px}
.brand{font-size:14px;font-weight:500;letter-spacing:.02em;color:var(--ink);text-decoration:none;display:flex;align-items:center;gap:9px}
.brand .dot{width:9px;height:9px;background:var(--accent);border-radius:50%;display:inline-block}
.top nav{font-size:14px;color:var(--ink2);display:flex;gap:26px}
.top nav a{text-decoration:none;transition:color .2s;position:relative}
.top nav a:hover{color:var(--accent)}
.top nav .on{color:var(--accent)}

/* 通用 section 标题 */
.eyebrow{font-size:12px;letter-spacing:.24em;text-transform:uppercase;color:var(--accent);font-weight:700}

/* 页脚 */
footer{border-top:1px solid var(--rule);margin-top:60px;padding:36px 0 70px;background:var(--paper2)}
.method{font-size:13.5px;color:var(--ink2);max-width:720px}
.method b{color:var(--ink);font-weight:500}
.disc{margin-top:16px;font-size:12px;color:var(--muted);line-height:1.75;max-width:720px}
.sig{margin-top:20px;font-size:12.5px;color:var(--muted);letter-spacing:.03em}
.beian{margin-top:16px;padding-top:14px;border-top:1px solid var(--rule);font-size:11.5px;color:var(--muted);display:flex;gap:20px;flex-wrap:wrap}
.beian a{color:var(--muted);text-decoration:none;transition:color .2s}
.beian a:hover{color:var(--accent)}

/* 动效 */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .8s cubic-bezier(.2,.7,.2,1),transform .8s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}.reveal.d4{transition-delay:.32s}
@media (prefers-reduced-motion: reduce){.reveal{opacity:1;transform:none;transition:none}}

/* 工具详情页 */
.doc{padding-top:38px;max-width:780px}
.crumb{font-size:12.5px;color:var(--muted);margin-bottom:20px}
.crumb a{color:var(--accent);text-decoration:none}
.doc-cat{font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--accent);font-weight:700}
.doc h1{font-family:"Noto Serif SC",serif;font-weight:900;font-size:48px;line-height:1.1;margin:12px 0 8px;letter-spacing:-.01em}
.doc h1 .en{font-family:"Spline Sans Mono",monospace;font-size:15px;color:var(--muted);font-weight:500;margin-left:12px;letter-spacing:0}
.doc .one{font-size:18px;color:var(--ink2);max-width:660px}
.doc .facts{display:flex;flex-wrap:wrap;gap:10px 12px;margin:22px 0 8px;background:var(--surface);border:1px solid var(--rule);border-radius:var(--r);padding:16px 20px;box-shadow:var(--sh1)}
.fact{font-size:12.5px;color:var(--ink2)}
.fact b{color:var(--muted);font-weight:400;margin-right:6px}
.fact .star{font-family:"Spline Sans Mono",monospace;color:var(--accent);font-weight:600}
.doc-body section{padding:30px 0;border-bottom:1px solid var(--rule)}
.doc-body h2{font-family:"Noto Serif SC",serif;font-weight:700;font-size:23px;margin-bottom:14px;display:flex;align-items:baseline;gap:11px}
.doc-body h2 .n{font-family:"Spline Sans Mono",monospace;font-size:13px;color:var(--accent);font-weight:600}
.doc-body p{font-size:15.5px;color:var(--ink2);margin-bottom:11px}
.doc-body ul{list-style:none;margin:6px 0}
.doc-body li{font-size:15.5px;color:var(--ink2);padding:6px 0 6px 22px;position:relative}
.doc-body li:before{content:"";position:absolute;left:0;top:15px;width:7px;height:7px;background:var(--accent);border-radius:50%}
.steps{counter-reset:s}
.steps .step{padding:14px 0 14px 44px;position:relative;border-bottom:1px dashed var(--rule)}
.steps .step:last-child{border-bottom:none}
.steps .step:before{counter-increment:s;content:counter(s);position:absolute;left:0;top:13px;width:28px;height:28px;background:var(--accent-soft);color:var(--accent);border-radius:50%;display:flex;align-items:center;justify-content:center;font-family:"Spline Sans Mono",monospace;font-size:13px;font-weight:600}
.steps .step .st{font-size:15.5px;font-weight:500;color:var(--ink)}
.steps .step .sd{font-size:14px;color:var(--ink2);margin-top:3px}
code,.code{font-family:"Spline Sans Mono",monospace;font-size:13px;background:var(--paper2);padding:2px 7px;border-radius:5px;border:1px solid var(--rule)}
pre.code{display:block;padding:13px 15px;margin:8px 0;white-space:pre-wrap;line-height:1.6}
.aibox{background:var(--accent-soft);border-radius:var(--r);padding:20px 24px;margin:8px 0}
.aibox h3{font-family:"Noto Serif SC",serif;font-weight:700;font-size:17px;color:var(--accent2);margin-bottom:8px}
.aibox p,.aibox li{color:#82331F;font-size:14.5px}
.aibox .pp{font-family:"Spline Sans Mono",monospace;font-size:12.5px;background:#fff;border-radius:var(--r-sm);border:1px solid #E9CBBD;padding:12px 14px;margin-top:10px;white-space:pre-wrap;color:#5E2918;line-height:1.65}
.refs{display:flex;gap:16px;flex-wrap:wrap;margin-top:8px}
.refs a{font-size:13.5px;color:var(--accent);text-decoration:none;font-weight:500}
.refs a:hover{text-decoration:underline}
.verdict{font-family:"Noto Serif SC",serif;font-size:17px;color:var(--ink);font-style:italic;line-height:1.8}