:root{
  --rcc-bg:#0B1220;
  --rcc-panel:#121C2E;
  --rcc-panel2:#0E1726;
  --rcc-text:#D7E0EC;
  --rcc-muted:#8A99AD;
  --rcc-primary:#1FB8D6;
  --rcc-accent:#D4A437;
  --rcc-border:#243246;
  --rcc-h2-inset:16px;
  --rcc-maxw:1200px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;background:var(--rcc-bg);color:var(--rcc-text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  line-height:1.7;font-size:16px;
}
a{color:var(--rcc-primary);text-decoration:none;}
a:hover{text-decoration:underline;}
img{max-width:100%;}
h1,h2,h3,h4{color:#fff;line-height:1.35;font-weight:700;}
.rcc-container{max-width:var(--rcc-maxw);margin:0 auto;padding:0 24px;}

/* ===== Header / Nav ===== */
.rcc-header{position:sticky;top:0;z-index:50;background:rgba(11,18,32,.92);
  backdrop-filter:blur(8px);border-bottom:1px solid var(--rcc-border);}
.rcc-nav-wrap{max-width:var(--rcc-maxw);margin:0 auto;padding:0 24px;
  display:flex;align-items:center;height:64px;gap:18px;}
.rcc-logo{font-size:20px;font-weight:800;color:#fff;white-space:nowrap;}
.rcc-logo span{color:var(--rcc-primary);}
.rcc-nav-toggle{display:none;background:none;border:1px solid var(--rcc-border);
  color:var(--rcc-text);font-size:22px;border-radius:8px;width:42px;height:38px;cursor:pointer;margin-left:auto;}
.rcc-nav{margin-left:auto;}
.rcc-nav>ul{display:flex;gap:6px;list-style:none;margin:0;padding:0;}
.rcc-nav-item{position:relative;}
.rcc-nav-item>a{display:block;padding:20px 14px;color:var(--rcc-text);font-size:15px;}
.rcc-nav-item>a:hover{color:var(--rcc-primary);text-decoration:none;}
.rcc-nav-sub{position:absolute;top:100%;left:0;background:var(--rcc-panel);
  border:1px solid var(--rcc-border);border-radius:10px;min-width:200px;
  padding:8px;display:none;box-shadow:0 12px 30px rgba(0,0,0,.4);}
.rcc-nav-item:hover .rcc-nav-sub{display:block;}
.rcc-nav-sub ul{list-style:none;margin:0;padding:0;}
.rcc-nav-sub a{display:block;padding:8px 12px;border-radius:6px;color:var(--rcc-text);}
.rcc-nav-sub a:hover{background:var(--rcc-panel2);color:var(--rcc-primary);}

/* ===== Breadcrumb (对齐 H2) ===== */
.rcc-breadcrumb{margin:22px 0 0;--h2-inset:var(--rcc-h2-inset);}
.rcc-breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;font-size:13px;color:var(--rcc-muted);}
.rcc-breadcrumb li:not(:last-child)::after{content:"›";margin-left:8px;color:var(--rcc-border);}
.rcc-breadcrumb a{color:var(--rcc-muted);}
.rcc-breadcrumb a:hover{color:var(--rcc-primary);}
.rcc-breadcrumb li[aria-current="page"]{color:var(--rcc-text);}

/* ===== Layout ===== */
.rcc-article-layout,.rcc-list-layout,.rcc-page-wrap{padding-bottom:48px;}
.rcc-layout-grid{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:36px;margin-top:18px;align-items:start;}
.rcc-list-grid{display:grid;grid-template-columns:240px minmax(0,1fr);gap:36px;margin-top:18px;align-items:start;}
.rcc-h1{font-size:30px;margin:18px 0 14px;}
.rcc-content-main{min-width:0;}
.rcc-content-main p,.rcc-page-main p{margin:0 0 16px;}
.rcc-content-main ul,.rcc-page-main ul{margin:0 0 16px;padding-left:22px;}
.rcc-content-main li,.rcc-page-main li{margin:4px 0;}
.rcc-content-main h2,.rcc-page-main h2{font-size:22px;margin:30px 0 12px;padding-bottom:8px;
  border-left:4px solid var(--rcc-primary);padding-left:12px;}
.rcc-content-main h3,.rcc-page-main h3{font-size:18px;margin:22px 0 10px;color:var(--rcc-primary);}
.rcc-content-main blockquote,.rcc-page-main blockquote{
  background:var(--rcc-panel);border-left:4px solid var(--rcc-accent);
  margin:18px 0;padding:14px 18px;border-radius:0 10px 10px 0;color:var(--rcc-text);}
.rcc-content-main blockquote p:last-child{margin-bottom:0;}
.rcc-update{font-size:13px;color:var(--rcc-muted);}
.rcc-update time{color:var(--rcc-primary);}

/* ===== Tables ===== */
.rcc-content-main table,.rcc-page-main table,table.rcc-spec{
  width:100%;border-collapse:collapse;margin:18px 0;font-size:14px;
  border:1px solid #cbd5e1;}
.rcc-content-main table th,.rcc-page-main table th,table.rcc-spec th{
  background:var(--rcc-primary);color:#04121a;text-align:left;padding:10px 12px;font-weight:700;}
.rcc-content-main table td,.rcc-page-main table td,table.rcc-spec td{
  border:1px solid #cbd5e1;padding:9px 12px;}
.rcc-content-main table tbody tr:nth-child(even),table.rcc-spec tbody tr:nth-child(even){background:rgba(255,255,255,.04);}

/* ===== TOC / Cat panel ===== */
.rcc-toc-aside,.rcc-cat-side{position:sticky;top:84px;align-self:start;}
.rcc-toc-panel,.rcc-cat-panel{background:var(--rcc-panel);border:1px solid var(--rcc-border);
  border-radius:12px;padding:14px 16px;}
.rcc-toc-panel summary,.rcc-cat-panel summary{cursor:pointer;font-weight:700;color:#fff;list-style:none;}
.rcc-toc-panel summary::-webkit-details-marker{display:none;}
.rcc-toc-panel summary::after,.rcc-cat-panel summary::after{content:"▾";float:right;color:var(--rcc-muted);}
.rcc-toc-panel[open] summary::after,.rcc-cat-panel[open] summary::after{content:"▴";}
.rcc-toc-list{list-style:none;margin:10px 0 0;padding:0;font-size:14px;}
.rcc-toc-list a{display:block;padding:5px 0;color:var(--rcc-muted);border-left:2px solid transparent;padding-left:10px;}
.rcc-toc-list a:hover{color:var(--rcc-primary);border-left-color:var(--rcc-primary);}
.rcc-category-list{list-style:none;margin:10px 0 0;padding:0;}
.rcc-category-list a{display:block;padding:8px 10px;border-radius:6px;color:var(--rcc-text);}
.rcc-category-list a:hover,.rcc-category-list a.active{background:var(--rcc-panel2);color:var(--rcc-primary);}

/* ===== FAQ / Related ===== */
.rcc-faq,.rcc-related{margin-top:34px;}
.rcc-faq h2,.rcc-related h2{font-size:22px;margin:0 0 12px;padding-bottom:8px;
  border-left:4px solid var(--rcc-primary);padding-left:12px;}
.rcc-faq details{background:var(--rcc-panel);border:1px solid var(--rcc-border);
  border-radius:10px;padding:12px 16px;margin-bottom:10px;}
.rcc-faq summary{cursor:pointer;font-weight:600;color:#fff;}
.rcc-faq summary::-webkit-details-marker{display:none;}
.rcc-faq summary::after{content:"+";float:right;color:var(--rcc-primary);font-size:18px;}
.rcc-faq details[open] summary::after{content:"−";}
.rcc-faq p{margin:10px 0 0;color:var(--rcc-text);}
.rcc-related ul{list-style:none;padding:0;margin:0;display:grid;gap:10px;}
.rcc-related li a{display:block;background:var(--rcc-panel);border:1px solid var(--rcc-border);
  border-radius:10px;padding:12px 16px;}
.rcc-related li a:hover{border-color:var(--rcc-primary);}

/* ===== List entries ===== */
.rcc-entry-list{display:grid;gap:16px;}
.rcc-entry{background:var(--rcc-panel);border:1px solid var(--rcc-border);border-radius:12px;padding:18px 20px;}
.rcc-entry h3{margin:0 0 6px;font-size:18px;}
.rcc-entry h3 a{color:#fff;}
.rcc-entry-cat{color:var(--rcc-accent);font-size:13px;margin:0 0 8px;}
.rcc-entry p{margin:0;color:var(--rcc-muted);font-size:14px;}

/* ===== Footer ===== */
.rcc-footer{background:var(--rcc-panel2);border-top:1px solid var(--rcc-border);margin-top:40px;padding:40px 0 18px;}
.rcc-footer-inner{max-width:var(--rcc-maxw);margin:0 auto;padding:0 24px;display:grid;
  grid-template-columns:1.6fr 1fr;gap:30px;}
.rcc-footer-brand p{color:var(--rcc-muted);font-size:14px;max-width:520px;}
.rcc-footer-cols{display:flex;gap:40px;}
.rcc-footer-cols h4{color:var(--rcc-primary);font-size:14px;margin:0 0 10px;}
.rcc-footer-cols a{display:block;color:var(--rcc-muted);font-size:14px;padding:4px 0;}
.rcc-footer-cols a:hover{color:var(--rcc-primary);}
.rcc-footer-bottom{max-width:var(--rcc-maxw);margin:24px auto 0;padding:16px 24px 0;border-top:1px solid var(--rcc-border);
  color:var(--rcc-muted);font-size:13px;}

/* ===== Float capsule ===== */
.rcc-float{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:60;
  display:flex;flex-direction:column;gap:10px;}
.rcc-float-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  width:54px;height:54px;border:none;border-radius:28px;cursor:pointer;
  background:linear-gradient(135deg,var(--rcc-primary),#157a93);color:#04121a;font-weight:700;font-size:18px;
  box-shadow:0 6px 18px rgba(31,184,214,.35);}
.rcc-float-btn span{font-size:11px;font-weight:600;}
.rcc-float-btn:nth-child(2){background:linear-gradient(135deg,var(--rcc-accent),#a87f1f);color:#1a1205;}
.rcc-float-btn:nth-child(3){background:linear-gradient(135deg,#3a4a63,#222d3f);color:#fff;}
.rcc-float-card-thumb{width:22px;height:34px;border-radius:3px;object-fit:cover;}
.rcc-card-mask{position:fixed;inset:0;background:rgba(4,9,18,.82);z-index:80;display:flex;
  align-items:center;justify-content:center;}
.rcc-card-mask[hidden]{display:none;}
.rcc-card-pop{background:#fff;padding:8px;border-radius:8px;box-shadow:0 20px 60px rgba(0,0,0,.5);}
.rcc-card-pop img{display:block;width:min(320px,78vw);height:auto;border-radius:4px;}

/* ===== Home ===== */
.rcc-hero{background:radial-gradient(1200px 400px at 50% -10%,rgba(31,184,214,.18),transparent),var(--rcc-bg);
  padding:64px 0 40px;border-bottom:1px solid var(--rcc-border);}
.rcc-hero h1{font-size:40px;margin:0 0 16px;}
.rcc-hero-sub{color:var(--rcc-muted);font-size:17px;max-width:760px;}
.rcc-hero-cta{margin-top:24px;display:flex;gap:14px;flex-wrap:wrap;}
.rcc-btn{display:inline-block;background:var(--rcc-primary);color:#04121a;font-weight:700;
  padding:12px 24px;border-radius:10px;}
.rcc-btn:hover{text-decoration:none;filter:brightness(1.08);}
.rcc-btn-ghost{background:transparent;border:1px solid var(--rcc-primary);color:var(--rcc-primary);}
.rcc-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin:34px auto;}
.rcc-stats div{background:var(--rcc-panel);border:1px solid var(--rcc-border);border-radius:12px;
  padding:18px;text-align:center;}
.rcc-stats strong{display:block;font-size:24px;color:var(--rcc-primary);}
.rcc-stats span{color:var(--rcc-muted);font-size:13px;}
.rcc-sec-title{font-size:24px;margin:36px 0 16px;color:#fff;}
.rcc-prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.rcc-prod-card,.rcc-view-card{background:var(--rcc-panel);border:1px solid var(--rcc-border);
  border-radius:12px;padding:20px;color:var(--rcc-text);}
.rcc-prod-card:hover,.rcc-view-card:hover{border-color:var(--rcc-primary);text-decoration:none;}
.rcc-prod-card h3,.rcc-view-card span{color:#fff;font-size:18px;}
.rcc-prod-card p,.rcc-view-card p{color:var(--rcc-muted);font-size:14px;margin:8px 0 0;}
.rcc-view-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;}
.rcc-capsule-row{display:flex;flex-wrap:wrap;gap:12px;}
.rcc-capsule{background:var(--rcc-panel);border:1px solid var(--rcc-border);color:var(--rcc-text);
  border-radius:999px;padding:8px 18px;font-size:14px;}
.rcc-cta-block{background:var(--rcc-panel);border:1px solid var(--rcc-border);border-radius:14px;
  padding:30px;text-align:center;margin:40px auto;}
.rcc-cta-block h2{margin:0 0 10px;}
.rcc-cta-block p{color:var(--rcc-muted);margin:0 0 18px;}

/* ===== Archive ===== */
.rcc-archive-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.rcc-archive-cat h3{color:var(--rcc-primary);font-size:16px;margin:0 0 8px;}
.rcc-archive-cat ul{list-style:none;margin:0;padding:0;}
.rcc-archive-cat li{padding:4px 0;border-bottom:1px solid var(--rcc-border);font-size:14px;}

/* ===== Responsive ===== */
@media (max-width:1024px){
  .rcc-nav-toggle{display:block;}
  .rcc-nav{display:none;position:absolute;top:64px;left:0;right:0;background:var(--rcc-panel);
    border-bottom:1px solid var(--rcc-border);}
  .rcc-nav.open{display:block;}
  .rcc-nav>ul{flex-direction:column;padding:8px 16px;}
  .rcc-nav-item>a{padding:12px 0;}
  .rcc-nav-sub{position:static;display:block;box-shadow:none;border:none;background:transparent;padding:0 0 0 14px;}
  .rcc-layout-grid,.rcc-list-grid{grid-template-columns:1fr;}
  .rcc-toc-aside,.rcc-cat-side{position:static;top:auto;}
  .rcc-prod-grid,.rcc-view-grid,.rcc-archive-grid{grid-template-columns:1fr 1fr;}
  .rcc-stats{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:600px){
  .rcc-prod-grid,.rcc-view-grid,.rcc-archive-grid{grid-template-columns:1fr;}
  .rcc-footer-inner{grid-template-columns:1fr;}
  .rcc-hero h1{font-size:30px;}
}