/* ===== rfdata 车载连接器资料站 · 视觉系统（原创） ===== */
:root{
  --bg:#0a1220;
  --bg-2:#0e1a2e;
  --surface:#111f38;
  --surface-2:#16263f;
  --line:#22324f;
  --line-soft:#1b2a44;
  --ink:#e7eefb;
  --ink-soft:#a9b8d4;
  --ink-dim:#7488ac;
  --brand:#2f7bff;
  --brand-2:#19d3c5;
  --brand-3:#7c5cff;
  --accent:#ffb020;
  --glow:rgba(47,123,255,.35);
  --radius:16px;
  --radius-sm:10px;
  --maxw:1180px;
  --h2-inset:16px;
  --shadow:0 18px 50px rgba(2,8,20,.45);
  --font:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--ink);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(1100px 600px at 85% -10%,rgba(47,123,255,.16),transparent 60%),
    radial-gradient(900px 500px at -10% 10%,rgba(124,92,255,.12),transparent 55%);
  background-attachment:fixed;
}
a{color:var(--brand-2);text-decoration:none;transition:color .2s}
a:hover{color:var(--brand)}
img{max-width:100%}
.container{width:min(100% - 40px,var(--maxw));margin:0 auto}

/* ===== 顶部导航 ===== */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(10,18,32,.82);
  backdrop-filter:saturate(140%) blur(12px);
  border-bottom:1px solid var(--line-soft);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--ink);font-size:18px}
.brand-mark{
  width:26px;height:26px;border-radius:8px;
  background:conic-gradient(from 140deg,var(--brand),var(--brand-2),var(--brand-3),var(--brand));
  box-shadow:0 0 18px var(--glow);
}
.brand-text{letter-spacing:.3px}
.main-nav{display:flex;align-items:center}
.nav-menu{display:flex;gap:4px;list-style:none;align-items:center}
.nav-menu>li{position:relative}
.nav-menu>li>a{
  display:block;padding:9px 13px;color:var(--ink-soft);border-radius:9px;font-size:14.5px;font-weight:500;
}
.nav-menu>li>a:hover{color:var(--ink);background:var(--surface)}
.has-sub>.sub-toggle{display:none}
.sub-menu{
  position:absolute;top:100%;left:0;min-width:190px;
  background:var(--surface);border:1px solid var(--line);border-radius:12px;
  padding:8px;box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(6px);
  transition:.18s;list-style:none;
}
.has-sub:hover .sub-menu{opacity:1;visibility:visible;transform:none}
.sub-menu li a{display:block;padding:8px 12px;border-radius:8px;color:var(--ink-soft);font-size:14px}
.sub-menu li a:hover{background:var(--surface-2);color:var(--ink)}
.nav-toggle{display:none;background:var(--surface);border:1px solid var(--line);color:var(--ink);
  padding:8px 14px;border-radius:9px;font-size:14px;cursor:pointer}

/* ===== Hero ===== */
.hero{padding:78px 0 54px;position:relative;overflow:hidden}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center}
.hero-kicker{color:var(--brand-2);font-weight:600;letter-spacing:2px;font-size:13px;text-transform:uppercase;margin-bottom:14px}
.hero h1{font-size:clamp(28px,4vw,46px);line-height:1.2;font-weight:800;letter-spacing:-.5px;
  background:linear-gradient(120deg,var(--ink),#bcd2ff 60%,var(--brand-2));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero-lead{margin:20px 0;color:var(--ink-soft);font-size:16.5px;max-width:560px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:8px}
.btn{display:inline-block;padding:12px 22px;border-radius:11px;font-weight:600;font-size:15px;cursor:pointer;border:1px solid transparent;transition:.2s}
.btn-primary{background:linear-gradient(120deg,var(--brand),var(--brand-3));color:#fff;box-shadow:0 10px 30px var(--glow)}
.btn-primary:hover{color:#fff;transform:translateY(-2px)}
.btn-ghost{background:var(--surface);border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{background:var(--surface-2);color:var(--ink)}
.hero-stats{display:flex;gap:28px;list-style:none;margin-top:34px;flex-wrap:wrap}
.hero-stats li{display:flex;flex-direction:column}
.hero-stats b{font-size:24px;color:var(--ink);font-weight:800}
.hero-stats span{color:var(--ink-dim);font-size:13px}
.hero-visual{height:340px;position:relative}
.hex-grid{position:absolute;inset:0;border-radius:24px;
  background:
    linear-gradient(135deg,rgba(47,123,255,.25),rgba(124,92,255,.18)),
    repeating-linear-gradient(60deg,transparent 0 22px,rgba(255,255,255,.05) 22px 23px),
    repeating-linear-gradient(-60deg,transparent 0 22px,rgba(255,255,255,.05) 22px 23px);
  border:1px solid var(--line);box-shadow:var(--shadow);
  -webkit-mask-image:radial-gradient(circle at 50% 40%,#000 60%,transparent 100%);
  mask-image:radial-gradient(circle at 50% 40%,#000 60%,transparent 100%);
}
.hero-art{display:block;width:100%;height:100%;filter:drop-shadow(0 0 18px rgba(0,240,255,.16))}

/* ===== 区块 ===== */
.section{padding:56px 0}
.section-alt{background:linear-gradient(180deg,transparent,rgba(22,38,63,.5),transparent)}
.sec-title{font-size:clamp(22px,3vw,32px);font-weight:800;text-align:center}
.sec-title.left{text-align:left}
.sec-sub{text-align:center;color:var(--ink-dim);margin-top:10px}
.cat-pills{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:28px}
.cat-pill a{display:flex;flex-direction:column;gap:2px;min-width:140px;padding:16px 18px;border-radius:14px;
  background:var(--surface);border:1px solid var(--line);transition:.2s}
.cat-pill a:hover{border-color:var(--brand);transform:translateY(-3px);box-shadow:var(--shadow)}
.cat-pill b{color:var(--ink);font-size:16px}
.cat-pill span{color:var(--ink-dim);font-size:12.5px}

/* ===== 卡片网格 ===== */
.post-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:20px;margin-top:28px}
.post-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:.2s;display:flex;flex-direction:column;gap:10px}
.post-card:hover{border-color:var(--brand);transform:translateY(-3px);box-shadow:var(--shadow)}
.post-card h3{font-size:18px;line-height:1.4}
.post-card h3 a{color:var(--ink)}
.post-card h3 a:hover{color:var(--brand-2)}
.post-meta{color:var(--ink-dim);font-size:12.5px}
.post-card p{color:var(--ink-soft);font-size:14.5px}
.read-more{margin-top:auto;font-weight:600;font-size:14px;color:var(--brand-2)}
.center{text-align:center;margin-top:22px}

/* ===== 应用区块 ===== */
.app-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.app-list{list-style:none;display:flex;flex-direction:column;gap:12px;margin-top:18px}
.app-list li{padding:12px 16px;background:var(--surface);border:1px solid var(--line);border-radius:10px;color:var(--ink-soft)}
.app-cards{display:grid;gap:14px}
.app-card{background:linear-gradient(135deg,var(--surface),var(--surface-2));border:1px solid var(--line);border-radius:14px;padding:18px}
.app-card h3{color:var(--brand-2);font-size:17px;margin-bottom:6px}
.app-card p{color:var(--ink-soft);font-size:14px}

/* ===== 列表页布局 ===== */
.list-shell{padding:40px 0 60px}
.list-layout{display:grid;grid-template-columns:230px 1fr;gap:30px;align-items:start}
.cat-side{position:sticky;top:84px;background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:18px}
.cat-title{font-size:15px;color:var(--ink-dim);margin-bottom:12px;text-transform:uppercase;letter-spacing:1px}
.category-list{list-style:none;display:flex;flex-direction:column;gap:4px}
.category-list li a{display:block;padding:9px 12px;border-radius:9px;color:var(--ink-soft);font-size:14.5px;border-left:3px solid transparent}
.category-list li a:hover,.category-list li.active a{background:var(--surface-2);color:var(--ink);border-left-color:var(--brand)}
.cat-content .lead{color:var(--ink-soft);margin:10px 0 6px}
.post-list{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:18px;margin-top:18px}

/* ===== 详情页布局 ===== */
.article-shell{padding:34px 0 60px}
.article-layout{display:grid;grid-template-columns:minmax(0,760px) 240px;gap:40px;align-items:start;margin:0 auto;max-width:1060px}
.article-content{padding-left:var(--h2-inset)}
.article-content h1{font-size:clamp(24px,3.2vw,34px);line-height:1.25;font-weight:800;margin:18px 0 14px}
.article-body{font-size:16.5px;color:var(--ink)}
.article-body h2{font-size:23px;margin:38px 0 14px;padding-top:10px;border-top:1px solid var(--line-soft);scroll-margin-top:80px;color:#fff}
.article-body h3{font-size:18.5px;margin:26px 0 10px;color:var(--brand-2);scroll-margin-top:80px}
.article-body p{margin:12px 0;color:var(--ink-soft)}
.article-body ul{margin:12px 0;padding-left:22px;color:var(--ink-soft)}
.article-body li{margin:6px 0}
.article-body blockquote{background:linear-gradient(90deg,rgba(47,123,255,.12),transparent);
  border-left:3px solid var(--brand);padding:12px 18px;border-radius:0 10px 10px 0;color:var(--ink);margin:16px 0}
.article-body code{background:var(--surface-2);padding:2px 7px;border-radius:6px;font-size:14px;color:var(--brand-2)}
.article-body hr{border:none;border-top:1px solid var(--line);margin:28px 0}

/* 摘要块 / 关键词 / 时间 */
.article-body>blockquote:first-of-type{font-size:16px}
.kw-line{color:var(--ink-dim);font-size:14px;margin:6px 0}
.kw-line b{color:var(--brand-2)}
time{display:inline-block;color:var(--ink-dim);font-size:13px;margin:4px 0 8px}

/* 表格 */
.table-wrap{overflow-x:auto;margin:18px 0;border-radius:12px;border:1px solid var(--line)}
table.data{width:100%;border-collapse:collapse;font-size:14.5px;background:var(--surface)}
table.data th{background:var(--surface-2);color:var(--ink);text-align:left;padding:12px 14px;font-weight:600;border-bottom:1px solid var(--line)}
table.data td{padding:11px 14px;border-bottom:1px solid var(--line-soft);color:var(--ink-soft)}
table.data tr:last-child td{border-bottom:none}
table.data tbody tr:hover{background:rgba(47,123,255,.06)}

/* FAQ */
.faq-block{margin:34px 0}
.faq-block h2{font-size:21px;margin-bottom:12px}
details{border:1px solid var(--line);border-radius:12px;padding:0;margin:10px 0;background:var(--surface);overflow:hidden}
details summary{cursor:pointer;padding:14px 18px;font-weight:600;color:var(--ink);list-style:none;position:relative}
details summary::-webkit-details-marker{display:none}
details summary::after{content:"+";position:absolute;right:18px;color:var(--brand-2);font-size:18px;transition:.2s}
details[open] summary::after{content:"−"}
details p{padding:0 18px 16px;color:var(--ink-soft)}

/* TOC */
.toc-aside{position:sticky;top:84px;max-height:calc(100vh - 110px);overflow-y:auto}
.toc-inner{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:16px}
.toc-title{font-size:13px;color:var(--ink-dim);text-transform:uppercase;letter-spacing:1px;margin-bottom:10px}
.toc-list{list-style:none;display:flex;flex-direction:column;gap:7px}
.toc-list a{color:var(--ink-soft);font-size:13.5px;line-height:1.4}
.toc-list a:hover{color:var(--brand-2)}
.toc-sub a{padding-left:12px;font-size:13px;color:var(--ink-dim)}

/* 面包屑 */
.breadcrumb{margin:6px 0 4px;font-size:13px}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:7px;align-items:center;color:var(--ink-dim)}
.breadcrumb li:not(:last-child)::after{content:"›";margin-left:7px;color:var(--ink-dim)}
.breadcrumb a{color:var(--ink-dim)}
.breadcrumb a:hover{color:var(--brand-2)}
.breadcrumb li[aria-current="page"]{color:var(--ink-soft)}

/* ===== 页（about 等） ===== */
.page-shell{padding:40px 0 60px}
.page-card{background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:48px;max-width:860px;margin:0 auto;
  --h2-inset:48px}
.page-card h1{font-size:30px;margin-bottom:18px}
.page-card h2{font-size:21px;margin:30px 0 12px;color:var(--brand-2)}
.page-card p,.page-card li{color:var(--ink-soft)}
.page-card ul{padding-left:22px;margin:12px 0}
.page-card .breadcrumb{margin-bottom:14px}
.archive-list{list-style:none;display:flex;flex-direction:column;gap:10px;margin-top:14px}
.archive-list li a{color:var(--ink)}

/* ===== 页脚 ===== */
.site-footer{border-top:1px solid var(--line-soft);background:var(--bg-2);margin-top:40px;padding:46px 0 26px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}
.footer-col h3{font-size:15px;color:var(--ink);margin-bottom:14px}
.footer-col p{color:var(--ink-dim);font-size:14px}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:9px}
.footer-col ul a{color:var(--ink-soft);font-size:14px}
.footer-bottom{border-top:1px solid var(--line-soft);margin-top:30px;padding-top:18px;color:var(--ink-dim);font-size:13px}
.footer-bottom p{margin:4px 0}

/* ===== 悬浮胶囊 ===== */
.float-capsule{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:80;
  display:flex;flex-direction:column;gap:12px}
.cap-btn{display:flex;align-items:center;gap:8px;width:54px;height:54px;justify-content:center;flex-direction:column;
  border:none;border-radius:30px;cursor:pointer;color:#fff;font-size:12px;font-weight:600;
  background:linear-gradient(135deg,var(--brand),var(--brand-3));box-shadow:0 10px 26px var(--glow);transition:.2s}
.cap-btn:hover{transform:scale(1.06)}
.cap-wechat{background:linear-gradient(135deg,#16c79a,#0fa3b1)}
.cap-ico{font-size:18px;line-height:1}

/* 名片弹窗 */
.wechat-modal{position:fixed;inset:0;z-index:120;display:none}
.wechat-modal.open{display:block}
.wechat-backdrop{position:absolute;inset:0;background:rgba(4,10,22,.7);backdrop-filter:blur(3px)}
.wechat-panel{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);background:var(--surface);
  border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:var(--shadow);text-align:center;max-width:92vw}
.wechat-close{position:absolute;right:10px;top:8px;background:none;border:none;color:var(--ink-soft);font-size:26px;cursor:pointer;line-height:1}
.wechat-frame{width:300px;height:500px;border-radius:12px;overflow:hidden;background:#0c1730;display:flex;align-items:center;justify-content:center}
.wechat-frame img{width:300px;height:500px;object-fit:contain;display:block}
.wechat-tip{color:var(--ink-dim);font-size:12.5px;margin-top:12px}

/* ===== 响应式 ===== */
@media (max-width:980px){
  .hero-inner{grid-template-columns:1fr}
  .hero-visual{height:240px;order:-1}
  .article-layout{grid-template-columns:1fr}
  .toc-aside{display:none}
  .app-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
}
@media (max-width:720px){
  .nav-toggle{display:block}
  .nav-menu{position:absolute;top:64px;left:0;right:0;flex-direction:column;background:var(--surface);
    border-bottom:1px solid var(--line);padding:10px;gap:2px;display:none}
  .nav-menu.open{display:flex}
  .sub-menu{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:none;background:transparent;padding:0 0 0 14px}
  .list-layout{grid-template-columns:1fr}
  .cat-side{position:static}
  .page-card{padding:26px}
  .float-capsule{right:10px}
  .container{width:min(100% - 28px,var(--maxw))}
}