:root{--bg:#f7f0cc;--paper:#fff9e6;--ink:#17150d;--muted:#655f35;--yellow:#efc82e;--line:rgba(23,21,13,.14);--shadow:0 16px 40px rgba(23,21,13,.1);--max:1120px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.75;overflow-x:hidden}body.locked{overflow:hidden}img{display:block;max-width:100%}a{color:inherit;text-decoration:none}button,input{font:inherit}button{cursor:pointer}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid var(--yellow);outline-offset:3px}
.wrap{width:min(var(--max),calc(100% - 32px));margin:auto}.site-head{position:fixed;inset:0 0 auto;z-index:60}.micro{height:22px;background:var(--ink);color:var(--yellow)}.micro-in{height:22px;display:flex;align-items:center;justify-content:space-between;font-size:12px}.micro button{border:0;background:transparent;color:var(--yellow);font-size:12px}.mainbar{height:68px;background:rgba(255,249,230,.97);border-bottom:1px solid var(--line)}.mainbar-in{height:100%;display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:18px}.site-logo,.footer-logo,.drawer-logo{height:28px;width:auto;max-width:170px;object-fit:contain}.logo-text{font-size:19px;font-weight:900}.topnav{display:flex;justify-content:center;gap:7px}.topnav a{padding:8px 12px;border-radius:11px;font-weight:800;font-size:14px}.topnav a:hover,.topnav a.on{background:var(--ink);color:var(--yellow)}.head-actions{display:flex;gap:8px}.head-actions a,.head-actions button,.btn{min-height:42px;padding:8px 14px;border:1px solid var(--ink);border-radius:12px;background:var(--paper);font-weight:900;display:inline-flex;align-items:center;justify-content:center}.head-actions a,.btn.main{background:linear-gradient(135deg,var(--ink),var(--yellow));color:var(--ink)}
.page-main{padding:118px 0 58px}.page-shell{width:min(var(--max),calc(100% - 32px));margin:auto}.hero,.section{background:var(--paper);border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);margin-bottom:22px}.hero{padding:28px}.section{padding:24px;box-shadow:none}.hero h1{font-size:clamp(28px,5vw,42px);line-height:1.18;margin:7px 0 12px}.hero .lead{max-width:820px;font-size:17px;color:var(--muted)}h2{font-size:24px;line-height:1.3;margin-top:0}h3{font-size:17px;margin-top:0}p{margin:0 0 14px}.eyebrow{font-size:12px;font-weight:900;letter-spacing:.12em;color:var(--muted)}.hero-grid,.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;align-items:center}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.feature-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:22px}.feature-strip article{padding:18px;background:var(--ink);color:var(--paper);border-radius:15px}.feature-strip strong{display:block;color:var(--yellow);margin-bottom:6px}.media-box,.banner-box,.portrait-box,.icon-box{background:#f0e1a7;border:1px solid var(--line);border-radius:16px;overflow:hidden;display:flex;align-items:center;justify-content:center}.media-box{height:220px}.banner-box{height:min(360px,42vw);min-height:220px}.portrait-box{height:320px;max-width:460px;margin:auto}.icon-box{width:72px;height:72px;margin:0 auto 14px}.media-box img,.banner-box img,.portrait-box img,.icon-box img{width:100%;height:100%;object-fit:contain;object-position:center}.icon-box img{width:52px;height:52px}.button-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:16px}.dark{background:var(--ink);color:var(--paper)}.dark h2,.dark h3{color:var(--yellow)}.process,.stack,.timeline,.list-cards,.term,.faq{display:grid;gap:14px}.process article{display:grid;grid-template-columns:70px 1fr;gap:16px;padding:18px;background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:14px}.step{width:56px;height:56px;border-radius:15px;background:var(--yellow);display:flex;align-items:center;justify-content:center;font-weight:900;font-size:22px}.card,.list-cards article,.term section,.faq article{padding:20px;background:var(--paper);border:1px solid var(--line);border-radius:15px}.timeline article{display:grid;grid-template-columns:150px 1fr;gap:18px;padding:18px;background:var(--paper);border:1px solid var(--line);border-radius:14px}.status{display:inline-flex;padding:6px 10px;border-radius:999px;background:var(--yellow);font-weight:900}.site-footer{background:var(--ink);color:var(--paper);border-top:2px solid var(--yellow);padding:44px 0 96px}.foot-brand{display:flex;align-items:center;gap:12px;margin-bottom:24px}.foot-brand strong{display:block;color:var(--yellow)}.foot-brand span{font-size:12px}.foot-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.foot-grid h2{font-size:15px;color:var(--yellow)}.foot-grid a{display:block;padding:4px 0;font-size:13px}.foot-note{font-size:13px;color:#eee6c4;margin-top:20px}
.mask{position:fixed;inset:0;background:rgba(23,21,13,.55);z-index:80;opacity:0;visibility:hidden;pointer-events:none;transition:.2s}.mask.open{opacity:1;visibility:visible;pointer-events:auto}.drawer{position:fixed;right:0;top:0;width:min(420px,92vw);height:100vh;overflow:auto;background:var(--bg);z-index:90;transform:translateX(105%);visibility:hidden;pointer-events:none;transition:.25s}.drawer.open{transform:translateX(0);visibility:visible;pointer-events:auto}.drawer-head{position:sticky;top:0;background:var(--bg);padding:15px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;z-index:2}.drawer-head>div{display:flex;align-items:center;gap:8px}.drawer-head button,.search-head button{min-height:42px;padding:7px 12px;border:1px solid var(--ink);border-radius:11px;background:var(--paper);font-weight:900}.drawer-body{padding:14px}.drawer-body section{padding:10px 0;border-bottom:1px solid var(--line)}.drawer-body h2{font-size:15px}.drawer-body a{display:block;padding:8px 0}.drawer-body b,.drawer-body span{display:block}.drawer-body span{font-size:12px;color:var(--muted)}
.search-layer{position:fixed;left:0;right:0;top:90px;z-index:95;opacity:0;visibility:hidden;pointer-events:none;transform:translateY(-8px);transition:.2s}.search-layer.open{opacity:1;visibility:visible;pointer-events:auto;transform:none}.search-card{width:min(700px,calc(100% - 32px));margin:auto;padding:20px;background:var(--paper);border:1px solid var(--ink);border-radius:0 0 16px 16px;box-shadow:var(--shadow)}.search-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:12px}.search-card input{width:100%;min-height:46px;border:1px solid var(--ink);border-radius:11px;padding:0 12px}.quick{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}.quick a{padding:7px 10px;border-radius:10px;background:var(--yellow);font-weight:900}.mobile-bottom{display:none}
@media(max-width:860px){.topnav{display:none}.mainbar-in{grid-template-columns:1fr auto}.feature-strip,.grid-3{grid-template-columns:repeat(2,1fr)}.hero-grid{grid-template-columns:1fr}.foot-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:680px){.page-main{padding-top:106px;padding-bottom:78px}.mainbar{height:60px}.head-actions a,.head-actions button{padding:7px 9px;font-size:13px}.site-logo{height:24px;max-width:118px}.feature-strip,.grid-2,.grid-3{grid-template-columns:1fr}.process article,.timeline article{grid-template-columns:1fr}.banner-box{height:240px;min-height:180px}.search-layer{inset:0;top:0;background:var(--ink);padding:16px}.search-card{width:100%;height:100%;border-radius:15px;overflow:auto}.mobile-bottom{display:grid;position:fixed;left:0;right:0;bottom:0;z-index:65;grid-template-columns:repeat(5,1fr);height:calc(50px + env(safe-area-inset-bottom));padding-bottom:env(safe-area-inset-bottom);background:var(--paper);border-top:1px solid var(--ink)}.mobile-bottom a{display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:900}.mobile-bottom a.on{background:var(--yellow)}}