:root{
  --canvas:#f7f7f4;
  --canvas-soft:#fafaf7;
  --surface-card:#ffffff;
  --surface-strong:#e6e5e0;
  --hairline:#e6e5e0;
  --hairline-soft:#efeee8;
  --hairline-strong:#cfcdc4;
  --ink:#26251e;
  --body:#5a5852;
  --muted:#807d72;
  --muted-soft:#a09c92;
  --primary:#f54e00;
  --primary-active:#d04200;
  --on-primary:#ffffff;
  --success:#1f8a65;
  --error:#cf2d56;
  --t-thinking:#dfa88f;
  --t-grep:#9fc9a2;
  --t-read:#9fbbe0;
  --t-edit:#c0a8dd;
  --t-done:#c08532;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:Inter,system-ui,"Helvetica Neue",Helvetica,Arial,sans-serif;
  background:var(--canvas);
  color:var(--body);
  font-size:16px;
  line-height:1.5;
  letter-spacing:-0.015em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--ink);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
h1,h2,h3,h4{color:var(--ink);font-weight:400}
h1{font-size:72px;line-height:1.1;letter-spacing:-2.16px}
h2{font-size:36px;line-height:1.2;letter-spacing:-0.72px}
h3{font-size:26px;line-height:1.25;letter-spacing:-0.325px}
h4{font-size:22px;line-height:1.3;letter-spacing:-0.11px}
p{margin-bottom:16px}
.section{padding:80px 0}
.section-tight{padding:48px 0}
.label{
  font-size:11px;font-weight:600;line-height:1.4;letter-spacing:0.88px;
  text-transform:uppercase;color:var(--muted);margin-bottom:16px;display:block;
}
.lead{font-size:18px;color:var(--body);max-width:680px}

.top-nav{
  height:64px;background:var(--canvas);border-bottom:1px solid var(--hairline);
  position:sticky;top:0;z-index:50;
}
.top-nav .inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.wordmark{font-size:18px;font-weight:600;letter-spacing:-0.02em;color:var(--ink)}
.wordmark span{color:var(--primary)}
.nav-links{display:flex;gap:28px;align-items:center;list-style:none}
.nav-links a{font-size:14px;font-weight:500;color:var(--ink)}
.nav-links a:hover{color:var(--primary);text-decoration:none}
.nav-toggle{display:none;background:none;border:0;font-size:22px;color:var(--ink);cursor:pointer}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:500;border-radius:8px;cursor:pointer;
  padding:10px 18px;height:40px;border:1px solid transparent;transition:background .15s;
}
.btn-primary{background:var(--primary);color:var(--on-primary)}
.btn-primary:hover{background:var(--primary-active);text-decoration:none;color:#fff}
.btn-secondary{background:var(--surface-card);color:var(--ink);border:1px solid var(--hairline-strong)}
.btn-secondary:hover{text-decoration:none;border-color:var(--ink)}
.btn-dark{background:var(--ink);color:var(--canvas);padding:12px 20px;height:44px}
.btn-dark:hover{text-decoration:none;color:var(--canvas);opacity:.9}

.hero{padding:96px 0 64px}
.hero h1{margin-bottom:24px}
.hero .lead{margin-bottom:32px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-figure{margin-top:48px;border-radius:12px;overflow:hidden;border:1px solid var(--hairline)}
.hero-figure img{width:100%;height:480px;object-fit:cover}
.caption{font-size:13px;line-height:1.4;color:var(--muted);padding:10px 4px}

.grid{display:grid;gap:24px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}

.card{
  background:var(--surface-card);border:1px solid var(--hairline);
  border-radius:12px;padding:24px;
}
.card h3{font-size:18px;font-weight:600;margin-bottom:8px}
.card p{font-size:16px;margin-bottom:0}

.article-card{background:var(--surface-card);border:1px solid var(--hairline);border-radius:12px;overflow:hidden;display:flex;flex-direction:column}
.article-card img{width:100%;height:200px;object-fit:cover}
.article-card .body{padding:20px;display:flex;flex-direction:column;flex:1}
.article-card h3{font-size:22px;letter-spacing:-0.11px;margin-bottom:8px}
.article-card p{font-size:16px;margin-bottom:16px}
.article-card .read{margin-top:auto;font-size:14px;font-weight:500;color:var(--primary)}

.badge{
  display:inline-block;background:var(--surface-strong);color:var(--ink);
  font-size:11px;font-weight:600;letter-spacing:0.88px;text-transform:uppercase;
  border-radius:9999px;padding:4px 10px;
}

.band-soft{background:var(--canvas-soft);border-top:1px solid var(--hairline);border-bottom:1px solid var(--hairline)}

.steps{counter-reset:step;list-style:none}
.steps li{position:relative;padding-left:48px;margin-bottom:20px}
.steps li::before{
  counter-increment:step;content:counter(step);
  position:absolute;left:0;top:0;width:32px;height:32px;border-radius:9999px;
  background:var(--ink);color:var(--canvas);display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:600;
}
.steps li strong{color:var(--ink)}

.article-body{max-width:760px;margin:0 auto}
.article-body h1{font-size:48px;letter-spacing:-1.2px;line-height:1.1;margin-bottom:16px}
.article-body .meta{font-size:13px;color:var(--muted);margin-bottom:32px}
.article-body figure{margin:32px 0;border-radius:12px;overflow:hidden;border:1px solid var(--hairline)}
.article-body figure img{width:100%;height:420px;object-fit:cover}
.article-body figcaption{font-size:13px;color:var(--muted);padding:10px 4px}
.article-body h2{font-size:30px;letter-spacing:-0.6px;margin:40px 0 16px}
.article-body h3{font-size:22px;margin:28px 0 12px}
.article-body ul,.article-body ol{margin:0 0 16px 22px}
.article-body li{margin-bottom:8px}
.callout{background:var(--canvas-soft);border:1px solid var(--hairline);border-left:3px solid var(--primary);border-radius:8px;padding:16px 20px;margin:24px 0}
.callout p{margin-bottom:0;font-size:15px}
.materials{background:var(--surface-card);border:1px solid var(--hairline);border-radius:12px;padding:24px;margin:24px 0}
.materials h3{margin-top:0}
.ext-note{font-size:14px;color:var(--muted)}

.related{display:flex;gap:16px;flex-wrap:wrap;margin-top:24px}
.related a{font-size:14px;font-weight:500;border:1px solid var(--hairline-strong);border-radius:9999px;padding:6px 14px;color:var(--ink)}
.related a:hover{text-decoration:none;border-color:var(--ink)}

.form-wrap{background:var(--surface-card);border:1px solid var(--hairline);border-radius:12px;padding:32px;max-width:560px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:600;color:var(--ink);margin-bottom:6px}
.field input{
  width:100%;height:44px;background:var(--surface-card);color:var(--ink);
  border:1px solid var(--hairline-strong);border-radius:8px;padding:12px 16px;font:inherit;
}
.field input:focus{outline:none;border-color:var(--primary)}
.form-msg{display:none;margin-top:16px;border-radius:8px;padding:12px 16px;font-size:15px}
.form-msg.show{display:block}
.form-msg.success{background:#e9f5f0;color:var(--success);border:1px solid #bfe3d6}
.spinner{width:16px;height:16px;border:2px solid rgba(255,255,255,.4);border-top-color:#fff;border-radius:50%;display:inline-block;margin-right:8px;animation:spin .6s linear infinite;vertical-align:-2px}
@keyframes spin{to{transform:rotate(360deg)}}

.footer{background:var(--canvas);border-top:1px solid var(--hairline);padding:64px 0 48px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px}
.footer h4{font-size:14px;font-weight:600;margin-bottom:16px;color:var(--ink)}
.footer ul{list-style:none}
.footer li{margin-bottom:10px}
.footer a{font-size:14px;color:var(--body)}
.footer .desc{font-size:14px;color:var(--body);max-width:320px}
.footer-bottom{border-top:1px solid var(--hairline);margin-top:48px;padding-top:24px;font-size:13px;color:var(--muted);display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px}

.cookie-banner{
  position:fixed;left:24px;right:24px;bottom:24px;z-index:100;
  background:var(--surface-card);border:1px solid var(--hairline-strong);border-radius:12px;
  padding:20px 24px;display:none;align-items:center;justify-content:space-between;gap:24px;
  max-width:1152px;margin:0 auto;
}
.cookie-banner.show{display:flex}
.cookie-banner p{margin:0;font-size:14px;color:var(--body);flex:1}
.cookie-actions{display:flex;gap:12px;flex-shrink:0}

.page-head{padding:64px 0 24px}
.page-head h1{font-size:48px;letter-spacing:-1.2px;line-height:1.1}
.legal{max-width:760px}
.legal h2{font-size:24px;margin:32px 0 12px}
.legal p,.legal li{font-size:16px}
.legal ul{margin:0 0 16px 22px}
.legal .meta{font-size:13px;color:var(--muted);margin-bottom:24px}

@media (max-width:1024px){
  h1{font-size:56px;letter-spacing:-1.6px}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  .nav-links{
    display:none;position:absolute;top:64px;left:0;right:0;background:var(--canvas);
    flex-direction:column;gap:0;border-bottom:1px solid var(--hairline);padding:8px 24px;
  }
  .nav-links.open{display:flex}
  .nav-links li{padding:12px 0;border-bottom:1px solid var(--hairline-soft)}
  .nav-toggle{display:block}
}
@media (max-width:640px){
  h1,.hero h1,.article-body h1,.page-head h1{font-size:32px;letter-spacing:-0.5px}
  h2{font-size:28px}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .hero-figure img{height:260px}
  .article-body figure img{height:240px}
  .cookie-banner{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr}
}