:root{
  --ink:#1c3b46;
  --ink-soft:#41575f;
  --paper:#f7f5f0;
  --card:#fffdf9;
  --line:#e2ded4;
  --accent:#9a6b3f;
  --ok:#3f6b52;
  --max:1060px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",sans-serif;
  font-size:17px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
a{color:inherit}
img{max-width:100%}
.wrap{max-width:var(--max);margin:0 auto;padding-left:24px;padding-right:24px}

/* header */
header{border-bottom:1px solid var(--line);background:rgba(247,245,240,.9);backdrop-filter:saturate(140%) blur(6px);position:sticky;top:0;z-index:10}
.bar{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;flex:none}
.brand svg{display:block}
.brand b{font-weight:600;letter-spacing:.02em;font-size:17px}
.brand span{color:var(--ink-soft);font-size:13px;letter-spacing:.14em}
nav{display:flex;gap:26px;font-size:15px;flex-wrap:wrap}
nav a{text-decoration:none;color:var(--ink-soft);transition:color .2s;white-space:nowrap}
nav a:hover{color:var(--ink)}
nav a[aria-current="page"]{color:var(--ink);border-bottom:1px solid var(--ink);padding-bottom:2px}

/* type */
.eyebrow{font-size:13px;letter-spacing:.18em;color:var(--accent);margin:0 0 18px}
h1{font-size:clamp(30px,4.6vw,50px);line-height:1.22;letter-spacing:.01em;font-weight:600;margin:0 0 22px;max-width:18em}
h2{font-size:clamp(21px,2.4vw,28px);font-weight:600;margin:0 0 16px;letter-spacing:.01em}
h3{font-size:18px;font-weight:600;margin:0 0 10px}
.lede{font-size:clamp(17px,1.6vw,20px);color:var(--ink-soft);max-width:36em;margin:0 0 36px}
.prose p{margin:0 0 18px;color:var(--ink-soft)}
.prose p:last-child{margin-bottom:0}
.small{font-size:14px;color:var(--ink-soft)}

/* sections */
.hero{padding-top:clamp(56px,8vw,104px);padding-bottom:clamp(40px,6vw,72px)}
section{padding-top:clamp(44px,6vw,72px);padding-bottom:clamp(44px,6vw,72px)}
.sec-head{display:flex;align-items:baseline;gap:16px;margin:0 0 32px}
.sec-head h2{margin:0}
.sec-head i{flex:1;height:1px;background:var(--line);font-style:normal}

/* buttons */
.actions{display:flex;flex-wrap:wrap;gap:14px}
.btn{display:inline-block;padding:13px 26px;border-radius:2px;text-decoration:none;font-size:15px;letter-spacing:.02em;transition:opacity .2s,background .2s,border-color .2s}
.btn-primary{background:var(--ink);color:var(--paper)}
.btn-primary:hover{opacity:.88}
.btn-ghost{border:1px solid var(--ink);color:var(--ink)}
.btn-ghost:hover{background:rgba(28,59,70,.05)}

/* cards */
.grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:3px;padding:28px;display:flex;flex-direction:column}
.card h3{margin:0 0 10px}
.card p{margin:0;color:var(--ink-soft);font-size:15.5px;line-height:1.8}
.card .more{margin-top:auto;padding-top:18px;font-size:14px;text-decoration:none;color:var(--accent)}
.card .more:hover{text-decoration:underline}
.card em{display:block;font-style:normal;font-size:12px;letter-spacing:.16em;color:var(--accent);margin-bottom:14px}

/* badges */
.badge{display:inline-block;font-size:12px;letter-spacing:.06em;padding:2px 10px;border-radius:999px;border:1px solid var(--line);color:var(--ink-soft);vertical-align:middle;margin-left:8px}
.badge.ok{border-color:#bfd3c7;color:var(--ok);background:#f1f6f2}

/* ladder */
.ladder{display:grid;gap:14px;margin:0;padding:0;list-style:none;counter-reset:step}
.rung{display:grid;grid-template-columns:56px 1fr auto;gap:18px;align-items:start;background:var(--card);border:1px solid var(--line);border-radius:3px;padding:22px 26px}
.rung .n{font-size:13px;letter-spacing:.16em;color:var(--accent);padding-top:4px}
.rung h3{margin:0 0 6px}
.rung p{margin:0;color:var(--ink-soft);font-size:15.5px}
.rung .tag{align-self:center;font-size:12.5px;color:var(--ink-soft);white-space:nowrap}

/* points */
.points{display:grid;gap:28px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));margin:0;padding:0;list-style:none}
.points li h3{margin:0 0 8px;font-size:17px}
.points li p{margin:0;color:var(--ink-soft);font-size:15.5px}

/* steps */
.steps{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));counter-reset:s;margin:0;padding:0;list-style:none}
.steps li{position:relative;padding-left:46px;color:var(--ink-soft);font-size:15.5px}
.steps li::before{counter-increment:s;content:counter(s);position:absolute;left:0;top:-2px;width:30px;height:30px;border-radius:50%;border:1px solid var(--line);color:var(--accent);font-size:14px;display:flex;align-items:center;justify-content:center}
.steps li b{display:block;color:var(--ink);margin-bottom:2px}

/* article (tool pages) */
.article{display:grid;gap:44px;grid-template-columns:minmax(0,1fr) 280px;align-items:start}
.side{background:var(--card);border:1px solid var(--line);border-radius:3px;padding:24px;position:sticky;top:96px}
.side dl{margin:0}
.side dt{font-size:12.5px;letter-spacing:.1em;color:var(--accent);margin-top:14px}
.side dt:first-child{margin-top:0}
.side dd{margin:4px 0 0;font-size:14.5px;color:var(--ink-soft)}
.block{margin:0 0 40px}
.block h2{font-size:20px;margin:0 0 12px}
.block p{margin:0 0 12px;color:var(--ink-soft)}
.block ul{margin:0;padding-left:1.2em;color:var(--ink-soft)}
.block ul li{margin-bottom:6px}
.flow{display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));margin:18px 0 0;padding:0;list-style:none}
.flow li{background:var(--card);border:1px solid var(--line);border-radius:3px;padding:18px}
.flow li b{display:block;margin-bottom:4px}
.flow li span{font-size:14.5px;color:var(--ink-soft)}

/* faq */
.faq{margin:0;padding:0;list-style:none;border-top:1px solid var(--line)}
.faq li{border-bottom:1px solid var(--line);padding:16px 0}
.faq dl{margin:0}
.faq dt{font-weight:600;margin-bottom:4px}
.faq dd{margin:0;color:var(--ink-soft);font-size:15.5px}

/* cta band */
.band{background:var(--ink);color:var(--paper);border-radius:3px;padding:clamp(32px,4.5vw,52px);display:flex;flex-wrap:wrap;gap:24px;align-items:center;justify-content:space-between}
.band h2{margin:0 0 8px;color:var(--paper)}
.band p{margin:0;color:rgba(247,245,240,.72);font-size:15.5px;max-width:34em}
.band .btn-primary{background:var(--paper);color:var(--ink)}
.band .btn-ghost{border-color:rgba(247,245,240,.6);color:var(--paper)}
.band .btn-ghost:hover{background:rgba(247,245,240,.1)}

/* table */
.table{width:100%;border-collapse:collapse;font-size:15px}
.table th,.table td{text-align:left;padding:12px 10px;border-bottom:1px solid var(--line);vertical-align:top}
.table th{font-weight:600;color:var(--ink);font-size:14px}
.table td{color:var(--ink-soft)}

/* footer */
footer{border-top:1px solid var(--line);margin-top:clamp(44px,6vw,72px);padding:26px 0 40px;color:var(--ink-soft);font-size:13.5px}
.foot{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between}
.foot a{text-decoration:none;color:var(--ink-soft)}
.foot a:hover{color:var(--ink)}

/* responsive */
@media (max-width:820px){
  .article{grid-template-columns:1fr}
  .side{position:static}
  .rung{grid-template-columns:36px 1fr;gap:12px}
  .rung .tag{grid-column:2;justify-self:start}
  nav{gap:18px;font-size:14px}
  .brand span{display:none}
  .bar{height:60px;flex-wrap:wrap;height:auto;padding:12px 0}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}