:root{
  --bg:#e8eef5;--panel:#f7fafc;--aside:#1e293b;--aside2:#0f172a;--line:#cbd5e1;
  --text:#0f172a;--muted:#64748b;--accent:#3b82f6;--accent2:#38bdf8;--max:1180px;
  --font:"IBM Plex Sans","Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box}
body{margin:0;font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7}
a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}
img{max-width:100%;height:auto;display:block}
.site-header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.wrap{max-width:var(--max);margin:0 auto;padding:0 1rem}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:56px}
.brand{display:flex;align-items:center;gap:.5rem;font-weight:700;color:var(--aside)}
.brand img{border-radius:8px}
.nav-desktop{display:flex;gap:1rem;font-size:.9rem}
.nav-desktop a{color:#334155}
.menu-toggle{display:none;border:1px solid var(--line);background:#fff;padding:.35rem .7rem;border-radius:8px;cursor:pointer}
#mobile-nav{display:none;flex-direction:column;gap:.35rem;padding:.6rem 1rem 1rem;background:#fff;border-bottom:1px solid var(--line)}
#mobile-nav.open{display:flex}
.sb-shell{display:grid;grid-template-columns:260px 1fr;min-height:calc(100vh - 56px);max-width:var(--max);margin:0 auto}
.sb-aside{background:linear-gradient(180deg,var(--aside),var(--aside2));color:#e2e8f0;padding:1.1rem .9rem 2rem;position:sticky;top:56px;height:calc(100vh - 56px);overflow:auto}
.sb-aside .aside-title{font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:#94a3b8;margin:0 0 .7rem;padding:0 .45rem}
.sb-nav{display:flex;flex-direction:column;gap:.25rem}
.sb-nav a{display:flex;align-items:center;gap:.55rem;padding:.55rem .65rem;border-radius:10px;color:#e2e8f0;font-size:.92rem}
.sb-nav a:hover,.sb-nav a:focus{background:rgba(59,130,246,.2);text-decoration:none}
.sb-nav .ico{width:1.35rem;text-align:center;opacity:.9}
.sb-main{background:var(--panel);padding:1.25rem 1.35rem 2.5rem}
.sb-main h1{margin:.2rem 0 .75rem;font-size:clamp(1.4rem,2.4vw,1.95rem);color:var(--aside2)}
.lead{color:var(--muted);font-size:1.02rem;max-width:42rem}
.panel-card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:1rem 1.1rem;margin:1rem 0}
.panel-card h2{margin:0 0 .6rem;font-size:1.2rem;color:#1e293b}
.panel-card h3{margin:1rem 0 .4rem;font-size:1.05rem;color:#334155}
.figure-block{margin:1rem 0}figcaption{font-size:.86rem;color:var(--muted);margin-top:.4rem}
.figure-block img{border-radius:10px;border:1px solid var(--line)}
.cta-row{display:flex;flex-wrap:wrap;gap:.6rem;margin:1rem 0}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:.55rem 1rem;border-radius:8px;font-weight:600}
.btn:hover{text-decoration:none;filter:brightness(1.05)}
.btn-line{background:#fff;color:var(--accent);border:1px solid #93c5fd}
.peers{list-style:none;padding:0;margin:0.8rem 0 0;display:flex;flex-wrap:wrap;gap:.7rem 1.1rem}
.peers a{font-weight:600}
.faq details{border:1px solid var(--line);border-radius:10px;padding:.65rem .9rem;margin:.5rem 0;background:#fff}
.faq summary{cursor:pointer;font-weight:600}
.chip-row{display:flex;flex-wrap:wrap;gap:.4rem;margin:.6rem 0 0}
.chip{font-size:.78rem;background:#e0f2fe;color:#0369a1;padding:.2rem .55rem;border-radius:999px}
.site-footer{background:#fff;border-top:1px solid var(--line);padding:1.3rem 0;font-size:.88rem;color:var(--muted)}
.site-footer a{color:#334155}.foot-note{opacity:.8}
.page-main{padding:1.4rem 0 2rem}.page-hero h1{font-size:1.5rem}
.prose p{margin:0 0 .95rem}.err-box{padding:2.5rem 1rem;text-align:center}
.ads-slot{background:var(--bg);border-bottom:1px solid var(--line)}
@media(max-width:900px){
  .nav-desktop{display:none}.menu-toggle{display:inline-block}
  .sb-shell{grid-template-columns:1fr}
  .sb-aside{position:relative;top:auto;height:auto;max-height:none}
}


/* SEO keyword highlight */
strong.kw,.kw{
  color:var(--accent,var(--brand,#e86a2c));
  font-weight:800;
}
mark.kw{
  background:color-mix(in srgb, var(--brand,#e86a2c) 16%, transparent);
  color:inherit;
  padding:0 .12em;
  border-radius:3px;
}
h1 .kw,h2 .kw,h3 .kw{color:var(--brand,#e86a2c)}

/* UNIQUE_HAMBURGER_THEME_START */

/* === unique chrome: hamburger-only + theme === */
:root{--bg:#e7eef7;--paper:#f7fafc;--ink:#142033;--muted:#5b6b82;--line:#c9d6e8;--soft:#eef3fa;--brand:#2563eb;--brand2:#60a5fa;--accent:#1d4ed8;--header-bg:#1e293b;--header-fg:#eff6ff;--radius:8px;--shadow:0 6px 16px rgba(37,99,235,.15);--font:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;}
body{font-family:var(--font)}
.site-header{
  position:sticky;top:0;z-index:50;
  background:var(--header-bg, var(--paper));
  color:var(--header-fg);
  border-bottom:1px solid var(--line);
}
.site-header .brand{color:var(--header-fg)}
.site-header .brand span{color:var(--header-fg)}
.nav-desktop{display:none!important}
.menu-toggle{display:inline-flex;align-items:center;justify-content:center;
  width:44px;height:44px;padding:0;cursor:pointer;
  border:1px solid var(--line);background:transparent;color:inherit;
  border-radius:var(--radius);
}
.menu-toggle .burger{
  width:20px;height:14px;display:flex;flex-direction:column;justify-content:space-between;
}
.menu-toggle .burger i{
  display:block;height:2px;width:100%;background:currentColor;border-radius:2px;
  transition:transform .22s ease,opacity .22s ease;
}
.menu-toggle[aria-expanded="true"] .burger i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.menu-toggle[aria-expanded="true"] .burger i:nth-child(2){opacity:0}
.menu-toggle[aria-expanded="true"] .burger i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
#mobile-nav{
  display:none;flex-direction:column;gap:.25rem;
  padding:.65rem 1rem 1rem;border-top:1px solid var(--line);
  background:var(--paper);color:var(--ink);
}
#mobile-nav.open{display:flex}
#mobile-nav a{
  padding:.7rem .55rem;border-radius:calc(var(--radius) / 2);
  color:var(--ink);font-weight:700;
}
#mobile-nav a:hover{background:color-mix(in srgb, var(--brand) 12%, transparent)}
.theme-app-chrome .site-header{/* marker */}

.menu-toggle{background:#334155;border:0;color:#fff;border-radius:8px}.menu-toggle .burger i{background:#fff}#mobile-nav{background:#1e293b}#mobile-nav a{color:#eff6ff}
/* UNIQUE_HAMBURGER_THEME_END */

/* DESKTOP_ADAPT_START */


html{ -webkit-text-size-adjust:100%; }
img,video{ max-width:100%; height:auto; }
.header-inner,.wrap,.site-main,.footer-inner,.ads-head{
  width:100%;
  margin-left:auto;margin-right:auto;
  box-sizing:border-box;
}
.header-inner{
  max-width:var(--desk-max, var(--max, 1120px));
  padding:.85rem clamp(1rem, 3vw, 1.75rem);
  min-height:64px;
}
.site-main,.wrap,.footer-inner,.ads-head{
  max-width:var(--desk-max, var(--max, 1120px));
  padding-left:clamp(1rem, 3vw, 1.75rem);
  padding-right:clamp(1rem, 3vw, 1.75rem);
}
@media (min-width:1280px){
  :root{ --desk-max:1240px; }
  body{ font-size:17.5px; }
}
@media (min-width:1440px){
  :root{ --desk-max:1320px; }
}



@media (min-width:901px){
  .sb-shell{
    display:grid!important; grid-template-columns:260px minmax(0,1fr);
    max-width:var(--desk-max); margin:0 auto; min-height:calc(100vh - 72px);
  }
  .sb-aside{ position:sticky; top:72px; height:calc(100vh - 72px); overflow:auto; }
  .sb-main{ padding:1.5rem 1.75rem 3rem; min-width:0; }
  .panel-card{ max-width:none; }
}

/* DESKTOP_ADAPT_END */

/* DESKTOP_ADAPT_PATCH */
@media (max-width:900px){
  #mobile-nav.open{
    flex-direction:column!important;
    align-items:stretch!important;
    justify-content:flex-start!important;
  }
  .header-inner,.site-main,.wrap,.footer-inner,.ads-head{
    padding-left:1rem;
    padding-right:1rem;
  }
}
@media (min-width:901px){
  .ads-head .ads-wrap{ max-width:100%; }
  #ads{ justify-content:center; gap:16px 20px; }
  /* cinema full-bleed frames stay edge-to-edge */
  body[data-template="cinema"] .cine-frame{
    width:100vw;
    margin-left:calc(50% - 50vw);
    margin-right:calc(50% - 50vw);
  }
  body[data-template="dark-band"] .band-hero,
  body[data-template="dark-band"] .band-dark,
  body[data-template="dark-band"] .band-light{
    width:100%;
  }
}


/* UNIQUE_VISUAL_SKIN_START */
body{
  background:#dbe5f3 !important;
}
.site-header{background:#0f172a!important;border-bottom:0!important}
.sb-shell{
  background:#fff!important;border-radius:16px!important;overflow:hidden!important;
  box-shadow:0 18px 40px rgba(15,23,42,.14)!important;margin-top:1rem!important;
  border:1px solid #c9d6e8!important;
}
.sb-aside{
  background:linear-gradient(180deg,#1e293b,#0f172a)!important;color:#e2e8f0!important;
  border-right:1px solid #334155!important;
}
.sb-aside a{color:#cbd5e1!important}
.sb-main{background:#f8fafc!important}
.panel-card{
  background:#fff!important;border:1px solid #dbe3ef!important;border-radius:12px!important;
  box-shadow:0 8px 18px rgba(15,23,42,.05)!important;
}
.chip{background:#dbeafe!important;color:#1d4ed8!important;border-radius:8px!important}
.site-footer{background:#0f172a!important;color:#cbd5e1!important}
/* UNIQUE_VISUAL_SKIN_END */


/* DESKTOP_NAV_TOP_START */
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  flex-wrap:nowrap;
}
#mobile-nav{
  display:none;
  flex-direction:column;
  gap:.25rem;
  width:100%;
  order:3;
  padding:.55rem 0 .85rem;
  border-top:1px solid var(--line, #e5e5e5);
  background:var(--paper, #fff);
}
#mobile-nav.open{display:flex}
.menu-toggle{display:inline-flex}

@media (min-width:901px){
  .menu-toggle{display:none!important}
  .header-inner{flex-wrap:nowrap;align-items:center}
  #mobile-nav,
  #mobile-nav.open{
    display:flex!important;
    flex-direction:row!important;
    flex-wrap:wrap;
    align-items:center;
    justify-content:flex-end;
    gap:.15rem .75rem;
    width:auto;
    max-width:none;
    order:0;
    margin-left:auto;
    margin-right:0;
    padding:0!important;
    border:0!important;
    background:transparent!important;
    box-shadow:none!important;
  }
  #mobile-nav a{
    padding:.35rem .45rem!important;
    white-space:nowrap;
    border-radius:0!important;
    background:transparent!important;
    color:inherit!important;
    font-weight:700;
  }
  #mobile-nav a:hover{
    color:var(--brand, var(--accent))!important;
    background:transparent!important;
    text-decoration:underline;
  }
}
@media (max-width:900px){
  .header-inner{flex-wrap:wrap}
  .menu-toggle{display:inline-flex!important;margin-left:auto}
  #mobile-nav{
    display:none;
    width:100%;
    order:3;
    flex-direction:column!important;
    align-items:stretch!important;
  }
  #mobile-nav.open{display:flex!important}
}
/* DESKTOP_NAV_TOP_END */