/* cff-boost.css — China for free 全站增强层
   独立于原有样式，全部 .cffb- 前缀，零外部字体/图标依赖。 */
:root{
  --cffb-ink:#2E2A24; --cffb-muted:#6B6257; --cffb-gold:#8A6537;
  --cffb-accent:#B68A5A; --cffb-paper:#F7F4EE; --cffb-line:#E5DED2;
}
.cffb-launcher{
  position:fixed; right:20px; bottom:20px; z-index:2147483000;
  width:56px; height:56px; border-radius:50%; border:1px solid #D8C9B2;
  background:var(--cffb-paper); color:var(--cffb-gold);
  box-shadow:0 6px 22px rgba(46,42,36,.22); cursor:pointer;
  display:flex; align-items:center; justify-content:center;
  font:600 22px/1 Georgia,serif; -webkit-tap-highlight-color:transparent;
  transition:transform .18s ease, box-shadow .18s ease;
}
.cffb-launcher:hover{transform:translateY(-2px);box-shadow:0 9px 26px rgba(46,42,36,.28)}
.cffb-launcher:focus-visible{outline:3px solid var(--cffb-accent);outline-offset:2px}
.cffb-launcher .cffb-x{font-size:24px;line-height:1}
.cffb-panel{
  position:fixed; right:20px; bottom:88px; z-index:2147483000;
  width:min(340px,calc(100vw - 32px)); max-height:min(74vh,660px);
  overflow:auto; background:#FFFDF9; border:1px solid var(--cffb-line);
  border-radius:14px; box-shadow:0 16px 48px rgba(46,42,36,.25);
  padding:18px 18px 14px; color:var(--cffb-ink);
  font:15px/1.55 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
}
.cffb-panel[hidden]{display:none}
.cffb-panel h2{font:600 17px/1.3 Georgia,serif;margin:0 0 4px;color:var(--cffb-ink)}
.cffb-panel .cffb-sub{font-size:12px;color:var(--cffb-muted);margin:0 0 14px}
.cffb-panel h3{font:600 11px/1.2 -apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;
  letter-spacing:.11em;text-transform:uppercase;color:var(--cffb-gold);
  margin:16px 0 8px;border-top:1px solid var(--cffb-line);padding-top:12px}
.cffb-panel h3:first-of-type{border-top:0;padding-top:0}
.cffb-links{display:grid;grid-template-columns:1fr 1fr;gap:7px}
.cffb-links a,.cffb-toc a{
  display:block;padding:8px 10px;border:1px solid var(--cffb-line);border-radius:8px;
  color:var(--cffb-ink);text-decoration:none;font-size:13px;line-height:1.35;
  background:#fff;transition:border-color .15s,background .15s}
.cffb-links a:hover,.cffb-toc a:hover{border-color:var(--cffb-accent);background:#FAF6EF}
.cffb-links a.cffb-primary{background:var(--cffb-gold);border-color:var(--cffb-gold);color:#fff;font-weight:600}
.cffb-links a.cffb-primary:hover{background:#77542C}
.cffb-toc{display:flex;flex-direction:column;gap:6px}
.cffb-toc a{font-size:12.5px;padding:7px 10px}
.cffb-toc a.cffb-h3{padding-left:20px;color:var(--cffb-muted);font-size:12px}
.cffb-lang{width:100%;padding:9px 10px;border:1px solid var(--cffb-line);border-radius:8px;
  background:#fff;color:var(--cffb-ink);font-size:14px;cursor:pointer}
.cffb-lang:focus-visible{outline:2px solid var(--cffb-accent)}
.cffb-contact{display:flex;flex-direction:column;gap:6px}
.cffb-contact a,.cffb-contact button{
  display:flex;justify-content:space-between;align-items:center;gap:8px;width:100%;
  padding:8px 10px;border:1px solid var(--cffb-line);border-radius:8px;background:#fff;
  color:var(--cffb-ink);font-size:13px;text-decoration:none;cursor:pointer;text-align:left;
  font-family:inherit}
.cffb-contact a:hover,.cffb-contact button:hover{border-color:var(--cffb-accent)}
.cffb-contact small{color:var(--cffb-muted);font-size:11px}
.cffb-note{font-size:11.5px;color:var(--cffb-muted);margin:10px 0 0;line-height:1.45}
.cffb-tools{display:flex;gap:7px;flex-wrap:wrap}
.cffb-tools button{flex:1;min-width:88px;padding:8px;border:1px solid var(--cffb-line);
  border-radius:8px;background:#fff;color:var(--cffb-ink);font-size:12.5px;cursor:pointer;font-family:inherit}
.cffb-tools button:hover{border-color:var(--cffb-accent)}
.cffb-toast{position:fixed;left:50%;bottom:26px;transform:translateX(-50%) translateY(12px);
  z-index:2147483600;background:#2E2A24;color:#fff;padding:9px 16px;border-radius:20px;
  font:13px/1.3 -apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;
  box-shadow:0 6px 20px rgba(0,0,0,.25);opacity:0;transition:opacity .2s,transform .2s;
  pointer-events:none;max-width:calc(100vw - 40px);text-align:center}
.cffb-toast.on{opacity:1;transform:translateX(-50%) translateY(0)}

/* 顶部轻量条：滚过一屏才出现，不遮首屏 */
.cffb-topbar{
  position:fixed;top:0;left:0;right:0;z-index:2147482000;
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:8px 16px;background:rgba(247,244,238,.96);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--cffb-line);
  font:13px/1.3 -apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;
  transform:translateY(-105%);transition:transform .22s ease}
.cffb-topbar.on{transform:translateY(0)}
.cffb-topbar .cffb-brand{font:600 15px/1 Georgia,serif;color:var(--cffb-gold);
  text-decoration:none;white-space:nowrap}
.cffb-topbar .cffb-act{display:flex;gap:8px;align-items:center}
.cffb-topbar a.cffb-cta{background:var(--cffb-gold);color:#fff;padding:6px 12px;
  border-radius:16px;text-decoration:none;font-weight:600;white-space:nowrap}
.cffb-topbar a.cffb-top{color:var(--cffb-muted);text-decoration:none;white-space:nowrap}

/* 表单失败时的备用联系卡 —— 保住线索，不让访客白填 */
.cffb-fallback{margin:14px 0 4px;padding:13px 14px;border:1px solid #E0C9A6;
  border-radius:10px;background:#FFF8EC;color:var(--cffb-ink);
  font:14px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif}
.cffb-fallback strong{display:block;font:600 15px/1.35 Georgia,serif;margin-bottom:4px}
.cffb-fallback p{margin:0 0 10px;font-size:13px;color:#5B5145}
.cffb-fallback .cffb-fb-row{display:flex;flex-wrap:wrap;gap:8px}
.cffb-fallback a,.cffb-fallback button{padding:8px 12px;border-radius:8px;
  border:1px solid var(--cffb-gold);background:#fff;color:var(--cffb-gold);
  font:600 13px/1.2 inherit;text-decoration:none;cursor:pointer;font-family:inherit}
.cffb-fallback a:hover,.cffb-fallback button:hover{background:var(--cffb-gold);color:#fff}

/* 内容页小工具：打印 / 复制链接 */
.cffb-page .cffb-crumb,.cffb-404 .cffb-crumb{
  font:12px/1.5 -apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;
  color:var(--cffb-muted);margin:0 0 18px}
.cffb-page .cffb-crumb a{color:var(--cffb-gold);text-decoration:none}
.cffb-page .cffb-crumb a:hover{text-decoration:underline}
.cffb-sep{color:#B9AE9D;margin:0 7px}
.cffb-pager{display:flex;justify-content:space-between;gap:12px;margin:26px 0 8px;
  flex-wrap:wrap;font-size:13px}
.cffb-pager .cffb-nav-link{color:var(--cffb-gold);text-decoration:none;max-width:47%}
.cffb-pager .cffb-nav-link.next{text-align:right;margin-left:auto}
.cffb-pager a:hover{text-decoration:underline}
.cffb-faq-list{margin:8px 0 26px}
.cffb-faq{border-bottom:1px solid var(--cffb-line);padding:2px 0}
.cffb-faq summary{cursor:pointer;padding:13px 2px;font:600 16px/1.45 Georgia,serif;
  list-style:none;display:flex;justify-content:space-between;gap:12px}
.cffb-faq summary::-webkit-details-marker{display:none}
.cffb-faq summary::after{content:"+";color:var(--cffb-accent);font:400 20px/1 Georgia,serif}
.cffb-faq[open] summary::after{content:"−"}
.cffb-faq-a{padding:0 2px 15px;font-size:15px;line-height:1.65;color:#4A433A}
.cffb-faq-a a{color:var(--cffb-gold)}
.cffb-404-list{list-style:none;padding:0;margin:18px 0 28px;
  display:grid;grid-template-columns:1fr 1fr;gap:9px}
.cffb-404-list a{display:block;padding:11px 13px;border:1px solid var(--cffb-line);
  border-radius:9px;text-decoration:none;color:var(--cffb-ink);font-size:14px;background:#fff}
.cffb-404-list a:hover{border-color:var(--cffb-accent);background:#FAF6EF}
.cffb-404-note{font-size:12px;color:var(--cffb-muted);margin-top:20px}

@media(max-width:620px){
  .cffb-launcher{right:14px;bottom:14px;width:52px;height:52px}
  .cffb-panel{right:12px;bottom:76px;width:calc(100vw - 24px);max-height:72vh}
  .cffb-links{grid-template-columns:1fr 1fr}
  .cffb-404-list{grid-template-columns:1fr}
  .cffb-topbar{padding:7px 12px}
  .cffb-topbar a.cffb-top{display:none}
}
@media print{
  .cffb-launcher,.cffb-panel,.cffb-topbar,.cffb-toast,.cffb-tools{display:none !important}
}

/* cff-boost:v1 — guide hub */
.cffb-hub{margin:22px 0 30px;padding:18px 20px;border:1px solid #E5DED2;
  border-radius:12px;background:#FFFDF9}
.cffb-hub p{margin:0 0 10px;font:600 14px/1.5 Georgia,serif;color:#8A6537}
.cffb-hub ol{margin:0;padding-left:20px;columns:2;column-gap:28px}
.cffb-hub li{margin:5px 0;break-inside:avoid;font-size:14px;line-height:1.45}
.cffb-hub a{color:#2E2A24;text-decoration:none;border-bottom:1px solid #D8C9B2}
.cffb-hub a:hover{color:#8A6537;border-color:#8A6537}
@media(max-width:640px){.cffb-hub ol{columns:1}}