*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Georgia,"Noto Serif SC","Songti SC",serif;color:#1c1c1c;background:#fff;line-height:1.85;-webkit-font-smoothing:antialiased;font-size:18px}
.sans{font-family:"PingFang SC","Microsoft YaHei",system-ui,sans-serif}
img{display:block;max-width:100%;height:auto}
a{color:#b45309;text-decoration:none}
a:hover{text-decoration:underline}

.col{width:min(700px,calc(100% - 40px));margin:0 auto}

.site-head{padding:24px 0 18px;border-bottom:1px solid #ececec;background:#fff;position:sticky;top:0;z-index:80}
.head-row{display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:11px;color:#111;font-weight:700;font-size:15px;font-family:"PingFang SC","Microsoft YaHei",sans-serif}
.brand img{width:36px;border-radius:8px}
.menu-btn{display:none;border:1px solid #ccc;background:#fff;padding:7px 12px;border-radius:6px;font-size:14px;cursor:pointer;font-family:inherit}
.top-nav{display:flex;gap:16px;flex-wrap:wrap;font-family:"PingFang SC","Microsoft YaHei",sans-serif}
.top-nav a{color:#555;font-size:13px;font-weight:600}
.mnav{display:none;flex-direction:column;padding:12px 0 4px;border-top:1px solid #f0f0f0;margin-top:12px;font-family:"PingFang SC","Microsoft YaHei",sans-serif}
.mnav.on{display:flex}
.mnav a{padding:10px 0;border-bottom:1px solid #f5f5f5;color:#444;font-size:14px}

.article{padding:44px 0 60px}
.article h1{font-size:clamp(30px,5vw,42px);line-height:1.24;font-weight:700;margin:0 0 18px;color:#111}
.deck{font-size:clamp(18px,3vw,21px);line-height:1.55;color:#444;margin:0 0 24px}
.byline{font-family:"PingFang SC","Microsoft YaHei",sans-serif;font-size:13px;color:#888;padding-bottom:28px;margin-bottom:32px;border-bottom:1px solid #e0e0e0}
.byline strong{color:#555;font-weight:600}

.article h2{font-size:25px;line-height:1.35;margin:48px 0 16px;color:#111;font-weight:700}
.article h3{font-size:19px;line-height:1.4;margin:32px 0 12px;color:#222;font-weight:700}
.article p{margin:0 0 20px;color:#333;font-size:18px}
.article ul,.article ol{margin:0 0 20px;padding-left:24px;color:#333;font-size:18px}
.article li{margin-bottom:8px}

.dropcap::first-letter{float:left;font-size:3.2em;line-height:.84;padding:4px 10px 0 0;font-weight:700;color:#111}

.pullquote{margin:44px 0;padding:32px 28px;background:#fafafa;border-left:5px solid #111;font-size:clamp(20px,3.2vw,26px);line-height:1.5;font-style:italic;color:#222;text-align:center;border-radius:0 8px 8px 0}
.pullquote cite{display:block;margin-top:16px;font-size:13px;font-style:normal;color:#888;font-family:"PingFang SC","Microsoft YaHei",sans-serif;letter-spacing:.05em}

.testimonial-strip{margin:48px 0;padding:36px 0;border-top:1px solid #e8e8e8;border-bottom:1px solid #e8e8e8}
.testimonial-strip h2{font-size:14px;text-transform:uppercase;letter-spacing:.12em;color:#888;text-align:center;margin:0 0 28px;font-family:"PingFang SC","Microsoft YaHei",sans-serif;font-weight:600}
.testimonial-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.testimonial{background:#fff;border:1px solid #ececec;border-radius:12px;padding:22px 20px;text-align:center}
.testimonial blockquote{margin:0;font-size:15px;line-height:1.65;color:#444;font-style:italic}
.testimonial cite{display:block;margin-top:14px;font-size:12px;font-style:normal;color:#999;font-family:"PingFang SC","Microsoft YaHei",sans-serif}

.fig{margin:32px 0;text-align:center}
.fig img{border-radius:6px;margin:0 auto;border:1px solid #eee}
.fig figcaption{font-family:"PingFang SC","Microsoft YaHei",sans-serif;font-size:13px;color:#777;margin-top:10px;line-height:1.5}
.fig-row{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:28px 0}
.fig-row figure{margin:0}
.fig-row img{border-radius:6px;border:1px solid #eee;aspect-ratio:9/16;object-fit:cover;width:100%}
.fig-row figcaption{font-size:12px;color:#777;margin-top:8px;font-family:"PingFang SC","Microsoft YaHei",sans-serif}

.note-box{margin:28px 0;padding:20px 22px;background:#fffbeb;border-left:4px solid #d97706;font-size:16px;color:#444;font-family:"PingFang SC","Microsoft YaHei",sans-serif;line-height:1.7}
.note-box strong{display:block;margin-bottom:6px;color:#92400e;font-size:14px}

.divider{text-align:center;margin:44px 0;color:#ccc;font-size:16px;letter-spacing:.4em}

.faq-block{margin:44px 0 0;padding-top:32px;border-top:1px solid #e8e8e8}
.faq-block h2{font-size:24px;margin-bottom:18px}
.faq-block details{border-bottom:1px solid #ececec;padding:14px 0}
.faq-block summary{cursor:pointer;font-weight:600;font-size:17px;color:#222;list-style:none;font-family:"PingFang SC","Microsoft YaHei",sans-serif}
.faq-block summary::-webkit-details-marker{display:none}
.faq-block p{margin:10px 0 0;font-size:16px;color:#555}

.prose-page{padding:40px 0 56px}
.prose-page h1{font-size:32px;line-height:1.25;margin:0 0 18px}
.prose-page h2{font-size:21px;margin:32px 0 12px;color:#222}
.prose-page p,.prose-page li{font-size:17px;color:#333}
.prose-page ul,.prose-page ol{padding-left:22px;margin-bottom:18px}
.related-box{margin-top:36px;padding:20px 22px;border:1px solid #e8e8e8;background:#fafafa;font-family:"PingFang SC","Microsoft YaHei",sans-serif;border-radius:10px}
.related-box h3{margin:0 0 10px;font-size:14px;color:#666;letter-spacing:.06em;text-transform:uppercase}
.related-box a{display:block;padding:5px 0;font-size:15px}

.site-foot{padding:36px 0 44px;border-top:1px solid #e8e8e8;font-family:"PingFang SC","Microsoft YaHei",sans-serif;font-size:13px;color:#888;background:#fff}
.site-foot a{color:#666;margin-right:16px}
.site-foot p{margin:12px 0 0}

.err-page{min-height:55vh;display:grid;place-items:center;text-align:center;padding:48px 20px}
.err-page h1{font-size:56px;margin:0 0 14px;color:#ccc;font-family:"PingFang SC","Microsoft YaHei",sans-serif}
.err-page p{font-size:17px;color:#666;font-family:"PingFang SC","Microsoft YaHei",sans-serif}

@media(max-width:720px){
  body{font-size:17px}
  .article h2{font-size:22px}
  .article p,.article li{font-size:17px}
  .testimonial-grid{grid-template-columns:1fr}
  .fig-row{grid-template-columns:1fr}
  .menu-btn{display:inline-block}
  .top-nav{display:none}
  .pullquote{padding:24px 18px;font-size:19px}
}