:root{
  --bg:#faf9f7;--paper:#fff;--text:#1f2328;--muted:#666d75;
  --brand:#6d47b8;--line:#e8e5ef;--soft:#f4f0fb;--max:820px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Arial,sans-serif;line-height:1.85}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.site-header{background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
.nav{max-width:1080px;margin:auto;padding:14px 22px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.brand{font-weight:800;color:var(--text);letter-spacing:.02em}
.nav-links{display:flex;gap:18px;font-size:14px}
.hero{max-width:1080px;margin:0 auto;padding:70px 22px 48px}
.hero h1{font-size:clamp(36px,7vw,68px);line-height:1.08;margin:0 0 18px;letter-spacing:-.04em}
.hero p{max-width:760px;color:var(--muted);font-size:18px}
.badge{display:inline-block;padding:6px 10px;background:var(--soft);color:var(--brand);border-radius:999px;font-size:13px;font-weight:700;margin-bottom:20px}
.grid{max-width:1080px;margin:0 auto 72px;padding:0 22px;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:24px}
.card h2,.card h3{margin-top:0;line-height:1.35}
.card p{color:var(--muted)}
.article-card{grid-column:span 2}
.fact-list{margin:0;padding:0;list-style:none}
.fact-list li{padding:10px 0;border-bottom:1px solid var(--line)}
.fact-list li:last-child{border-bottom:0}
.article-shell{max-width:var(--max);margin:48px auto 80px;background:var(--paper);border:1px solid var(--line);border-radius:22px;padding:clamp(24px,6vw,56px)}
.article-meta{font-size:14px;color:var(--muted);margin-bottom:18px}
.article-shell h1{font-size:clamp(30px,5vw,48px);line-height:1.18;letter-spacing:-.025em;margin:0 0 14px}
.article-shell .lead{font-size:17px;color:var(--muted);margin-bottom:38px}
.article-shell h2{font-size:27px;line-height:1.35;margin:48px 0 20px;padding-top:8px}
.article-shell h3.faq-q{font-size:18px;margin:30px 0 6px}
.article-shell p{margin:14px 0}
blockquote{margin:22px 0;padding:16px 20px;border-left:4px solid var(--brand);background:var(--soft);font-size:18px;font-weight:700}
.thesis{font-size:24px;font-weight:850;line-height:1.45;margin:30px 0!important;color:#2d1a55}
.bridge{color:var(--muted);font-weight:600}
.contact-line{margin-top:10px!important;padding:16px;border-radius:12px;background:var(--soft)}
.notice{margin:32px 0;padding:18px 20px;border:1px solid var(--line);border-radius:14px;background:#fcfbff;color:var(--muted);font-size:14px}
.footer{border-top:1px solid var(--line);padding:34px 22px;color:var(--muted);font-size:14px}
.footer-inner{max-width:1080px;margin:auto}
@media(max-width:800px){
  .grid{grid-template-columns:1fr}.article-card{grid-column:span 1}
  .nav-links{display:none}.hero{padding-top:48px}
  .article-shell{margin:20px 12px 50px;border-radius:16px}
}