/* ==========================================================================
   QuickQ · 暗夜驾驶舱 NIGHT OPS —— 深色控制台主题
   主色 #2071FF(官方蓝) 底 #060b16 面板 #0d1729 描边 #1c2a44
   ========================================================================== */
:root{
  --bg:#060b16;
  --bg-2:#081020;
  --panel:#0d1729;
  --panel-2:#101d33;
  --line:#1c2a44;
  --line-soft:#16233a;
  --ink:#e8eefc;
  --ink-dim:#93a4c4;
  --ink-faint:#5f7194;
  --brand:#2071ff;
  --brand-2:#4d96ff;
  --cyan:#38bdf8;
  --green:#22c55e;
  --amber:#f59e0b;
  --red:#f43f5e;
  --grad:linear-gradient(92deg,#4d96ff 0%,#38bdf8 100%);
  --radius:14px;
  --shadow:0 18px 50px -22px rgba(0,0,0,.75);
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei","PingFang SC",sans-serif;
  background:var(--bg);
  color:var(--ink);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-1;
  background:
    radial-gradient(1200px 600px at 85% -10%,rgba(32,113,255,.16),transparent 60%),
    radial-gradient(900px 500px at -10% 20%,rgba(56,189,248,.10),transparent 60%),
    var(--bg);
}
a{color:var(--brand-2);text-decoration:none}
a:hover{color:var(--cyan)}
img{max-width:100%;display:block}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
h1,h2,h3,h4{line-height:1.25;font-weight:800;letter-spacing:-.01em}
h1{font-size:42px}
h2{font-size:30px;margin-bottom:14px}
h3{font-size:20px}
p{color:var(--ink-dim)}

/* ===== 顶部 HUD 状态条 ===== */
.hud{
  position:sticky;top:0;z-index:50;
  background:rgba(6,11,22,.82);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line-soft);
}
.hud-inner{display:flex;align-items:center;gap:28px;height:66px}
.brand{display:flex;align-items:center;gap:2px;flex:0 0 auto}
.brand img{height:34px;width:auto}
.nav-links{display:flex;align-items:center;gap:6px;flex:1 1 auto}
.nav-link{
  color:var(--ink-dim);font-size:15px;font-weight:600;
  padding:8px 14px;border-radius:9px;position:relative;
}
.nav-link:hover{color:var(--ink);background:var(--panel)}
.nav-link.active{color:var(--cyan)}
.nav-link.active::after{
  content:"";position:absolute;left:14px;right:14px;bottom:2px;height:2px;
  border-radius:2px;background:var(--grad);
}
.status-light{
  display:flex;align-items:center;gap:8px;flex:0 0 auto;
  color:var(--green);font-size:13px;font-weight:600;font-family:var(--mono);
  background:rgba(34,197,94,.08);border:1px solid rgba(34,197,94,.25);
  padding:6px 12px;border-radius:999px;
}
.status-dot{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 0 0 rgba(34,197,94,.6);animation:pulse 2s infinite}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(34,197,94,.55)}70%{box-shadow:0 0 0 8px rgba(34,197,94,0)}100%{box-shadow:0 0 0 0 rgba(34,197,94,0)}}
.hud-cta{
  flex:0 0 auto;background:var(--brand);color:#fff;font-weight:700;font-size:14px;
  padding:9px 18px;border-radius:9px;box-shadow:0 6px 20px -8px rgba(32,113,255,.9);
}
.hud-cta:hover{background:var(--brand-2);color:#fff}

/* ===== hero ===== */
.hero{padding:72px 0 0}
.hero-console{
  display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center;
  padding-bottom:40px;
}
.eyebrow{
  display:inline-block;font-family:var(--mono);font-size:12px;letter-spacing:.18em;
  color:var(--cyan);text-transform:uppercase;margin-bottom:18px;
}
.hero-text h1{font-size:46px;margin-bottom:18px}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:18px;color:var(--ink-dim);margin-bottom:26px;max-width:34em}
.actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:9px;font-weight:700;font-size:16px;
  padding:13px 24px;border-radius:11px;background:var(--brand);color:#fff;
  box-shadow:0 10px 26px -10px rgba(32,113,255,.95);transition:transform .15s ease,background .15s ease;
}
.btn:hover{background:var(--brand-2);color:#fff;transform:translateY(-2px)}
.btn svg{width:18px;height:18px}
.btn.secondary{
  background:transparent;color:var(--ink);border:1px solid var(--line);box-shadow:none;
}
.btn.secondary:hover{border-color:var(--brand-2);color:var(--cyan)}
.readouts{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.readout{
  flex:0 0 auto;background:var(--panel);border:1px solid var(--line);border-radius:11px;
  padding:11px 16px;min-width:112px;
}
.readout b{display:block;font-family:var(--mono);font-size:19px;color:var(--cyan);font-weight:700}
.readout span{display:block;font-size:12px;color:var(--ink-faint);margin-top:2px}

/* ===== 雷达盘 ===== */
.hero-visual{display:flex;justify-content:center}
.radar{
  position:relative;width:100%;max-width:430px;aspect-ratio:1;
  border-radius:50%;border:1px solid var(--line);
  background:
    radial-gradient(circle at 50% 50%,rgba(32,113,255,.10),transparent 62%),
    radial-gradient(circle at 50% 50%,rgba(56,189,248,.06) 0 30%,transparent 31%),
    var(--panel);
  box-shadow:var(--shadow),inset 0 0 70px rgba(32,113,255,.08);
  overflow:hidden;
}
.radar-svg{position:absolute;inset:0;width:100%;height:100%}
.radar-sweep{
  position:absolute;inset:0;transform-origin:50% 50%;animation:spin 6s linear infinite;
  background:conic-gradient(from 0deg,rgba(56,189,248,.34),rgba(56,189,248,.06) 26%,transparent 31%);
  border-radius:50%;
}
@keyframes spin{to{transform:rotate(360deg)}}
.radar-label{
  position:absolute;left:0;right:0;bottom:9%;text-align:center;
  font-family:var(--mono);font-size:11px;letter-spacing:.2em;color:var(--ink-faint);text-transform:uppercase;
}
.radar-center{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:46px;height:46px;border-radius:50%;background:var(--panel-2);
  border:1px solid var(--brand-2);display:flex;align-items:center;justify-content:center;
  font-family:var(--mono);font-size:10px;color:var(--cyan);letter-spacing:.08em;
}

/* ===== 系统状态条 ===== */
.status-strip{
  border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft);
  background:var(--bg-2);
}
.status-strip .wrap{display:flex;gap:34px;flex-wrap:wrap;padding-top:14px;padding-bottom:14px}
.strip-item{display:flex;align-items:center;gap:9px;font-size:13px;color:var(--ink-dim)}
.strip-item b{color:var(--ink);font-family:var(--mono);font-weight:700}
.strip-item .dot{width:7px;height:7px;border-radius:50%;background:var(--green)}

/* ===== 面板(通用 section) ===== */
.panel{padding:72px 0}
.panel.alt{background:var(--bg-2);border-top:1px solid var(--line-soft);border-bottom:1px solid var(--line-soft)}
.panel-head{max-width:620px;margin-bottom:40px}
.panel-head h2{font-size:32px}
.panel-head p{font-size:16px;margin-top:10px}
.panel-head .eyebrow{margin-bottom:14px}

/* ===== 仪表模块网格(核心优势) ===== */
.grid{display:grid;gap:18px}
.grid-6{grid-template-columns:repeat(3,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.module{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:22px;position:relative;overflow:hidden;
}
.module::before{
  content:"";position:absolute;inset:0 0 auto 0;height:3px;
  background:var(--grad);opacity:0;transition:opacity .2s ease;
}
.module:hover::before{opacity:1}
.module:hover{border-color:var(--brand-2)}
.module-num{
  font-family:var(--mono);font-size:12px;color:var(--cyan);letter-spacing:.1em;
  display:block;margin-bottom:12px;
}
.module h3{color:var(--ink);margin-bottom:8px;font-size:18px}
.module p{font-size:14.5px}
.module-icon{color:var(--brand-2)}
.module-icon svg{width:24px;height:24px;margin-bottom:12px}

/* ===== 双模式场景面板 ===== */
.modes{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.mode{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:28px;display:flex;flex-direction:column;
}
.mode-tag{
  align-self:flex-start;font-family:var(--mono);font-size:11px;letter-spacing:.14em;
  color:var(--cyan);background:rgba(56,189,248,.1);border:1px solid rgba(56,189,248,.28);
  padding:4px 10px;border-radius:6px;margin-bottom:16px;
}
.mode h3{font-size:22px;margin-bottom:10px}
.mode p{font-size:15px;margin-bottom:14px}
.mode ul{list-style:none;margin:0 0 18px;display:grid;gap:8px}
.mode ul li{color:var(--ink-dim);font-size:14.5px;padding-left:20px;position:relative}
.mode ul li::before{content:"";position:absolute;left:0;top:8px;width:8px;height:8px;border-radius:2px;background:var(--brand-2)}
.mode .btn{align-self:flex-start}

/* ===== 航行日志(文章 feed) ===== */
.log{display:grid;gap:1px;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.log-entry{
  display:grid;grid-template-columns:90px 1fr auto;gap:18px;align-items:center;
  background:var(--panel);padding:18px 22px;transition:background .15s ease;
}
.log-entry:hover{background:var(--panel-2)}
.log-entry + .log-entry{border-top:1px solid var(--line-soft)}
.log-tag{
  font-family:var(--mono);font-size:11px;color:var(--cyan);letter-spacing:.08em;
  border:1px solid rgba(56,189,248,.28);border-radius:6px;padding:3px 8px;text-align:center;
}
.log-body h3{font-size:17px;color:var(--ink);margin-bottom:3px}
.log-body p{font-size:13.5px}
.log-arrow{color:var(--ink-faint);font-size:20px;font-family:var(--mono)}
.log-entry:hover .log-arrow{color:var(--cyan)}

/* ===== 故障排查手册(FAQ) ===== */
.checklist{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.check-item{border-bottom:1px solid var(--line-soft)}
.check-item:last-child{border-bottom:none}
.check-item summary{
  display:flex;align-items:center;gap:14px;cursor:pointer;list-style:none;
  padding:17px 22px;font-weight:700;color:var(--ink);font-size:15.5px;
}
.check-item summary::-webkit-details-marker{display:none}
.check-item summary::before{
  content:"+";flex:0 0 auto;width:24px;height:24px;border-radius:7px;
  background:var(--panel-2);border:1px solid var(--line);color:var(--cyan);
  display:flex;align-items:center;justify-content:center;font-weight:700;font-size:16px;
}
.check-item[open] summary::before{content:"−"}
.check-item .check-body{padding:0 22px 18px 60px;color:var(--ink-dim);font-size:15px}
.check-item .check-body p{color:var(--ink-dim)}

/* ===== 数据/参数一览 ===== */
.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:var(--panel)}
table{width:100%;border-collapse:collapse;font-size:14.5px}
th,td{text-align:left;padding:13px 18px;border-bottom:1px solid var(--line-soft);vertical-align:top}
th{color:var(--cyan);font-weight:700;font-size:13px;letter-spacing:.02em;white-space:nowrap}
tbody tr:last-child td{border-bottom:none}
td{color:var(--ink-dim)}
td b,td strong{color:var(--ink)}
.tag-ok{color:var(--green) !important;font-weight:700}

/* ===== 步骤 / 时间线 ===== */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.step{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;position:relative;counter-increment:step;
}
.step::before{
  content:"0" counter(step);font-family:var(--mono);font-size:13px;color:var(--cyan);
  letter-spacing:.1em;display:block;margin-bottom:12px;
}
.step h3{margin-bottom:8px;font-size:18px}

/* ===== 左右图文 ===== */
.split{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.split.rev .split-media{order:2}
.split-media img{border-radius:var(--radius);border:1px solid var(--line);box-shadow:var(--shadow)}
.split-body h3{font-size:23px;margin-bottom:12px}
.split-body p{margin-bottom:12px}
.split-body ul{list-style:none;margin:14px 0 20px;display:grid;gap:9px}
.split-body ul li{color:var(--ink-dim);padding-left:22px;position:relative}
.split-body ul li::before{content:"▸";position:absolute;left:0;color:var(--cyan)}
.split-body ol{margin:12px 0 16px;padding-left:20px;display:grid;gap:8px}
.split-body ol li{color:var(--ink-dim)}

/* ===== 提示 / 警示框 ===== */
.tip{
  background:rgba(32,113,255,.09);border:1px solid rgba(32,113,255,.3);border-radius:11px;
  padding:14px 18px;font-size:14.5px;color:var(--ink-dim);
}
.tip strong{color:var(--cyan)}
.callout{
  background:rgba(245,158,11,.08);border:1px solid rgba(245,158,11,.3);border-left:3px solid var(--amber);
  border-radius:11px;padding:15px 18px;font-size:14.5px;color:var(--ink-dim);
}

/* ===== 面包屑 ===== */
.crumbs{display:flex;align-items:center;gap:8px;padding:18px 20px;font-size:13.5px;color:var(--ink-faint);flex-wrap:wrap}
.crumbs a{color:var(--ink-faint)}
.crumbs a:hover{color:var(--cyan)}
.crumbs .sep{color:var(--ink-faint)}

/* ===== 平台卡 ===== */
.plat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.plat{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;transition:border-color .15s ease,transform .15s ease;
}
.plat:hover{border-color:var(--brand-2);transform:translateY(-3px)}
.plat .icon{color:var(--brand-2)}
.plat .icon svg{width:28px;height:28px;margin-bottom:14px}
.plat h3{font-size:18px;margin-bottom:6px}
.plat h3 a{color:var(--ink)}
.plat h3 a:hover{color:var(--cyan)}
.plat p{font-size:13.5px}

/* ===== 教程 hub 分组 ===== */
.guide-group{margin-bottom:34px}
.guide-group h3{
  font-size:16px;color:var(--cyan);margin-bottom:16px;letter-spacing:.04em;
  padding-bottom:10px;border-bottom:1px solid var(--line);
}

/* ===== 文章页 ===== */
.article-layout{display:grid;grid-template-columns:240px 1fr;gap:44px;align-items:start}
.article-toc{
  position:sticky;top:90px;background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);padding:20px;
}
.article-toc h4{font-size:13px;color:var(--ink-faint);letter-spacing:.1em;margin-bottom:12px;text-transform:uppercase}
.article-toc ol{list-style:none;display:grid;gap:9px}
.article-toc a{color:var(--ink-dim);font-size:13.5px;display:block;padding-left:12px;border-left:2px solid var(--line)}
.article-toc a:hover{color:var(--cyan);border-left-color:var(--cyan)}
.article-body{max-width:720px}
.article-body .lead-para{font-size:18px;color:var(--ink);margin-bottom:22px}
.article-body h2{font-size:25px;margin:38px 0 14px;padding-top:8px}
.article-body h3{font-size:19px;margin:26px 0 10px}
.article-body p{margin-bottom:15px;font-size:16px}
.article-body ul,.article-body ol{margin:0 0 18px;padding-left:24px;display:grid;gap:8px}
.article-body li{color:var(--ink-dim)}
.article-body figure{margin:24px 0}
.article-body figure img{border-radius:var(--radius);border:1px solid var(--line)}
.article-body figcaption{font-size:13px;color:var(--ink-faint);text-align:center;margin-top:10px}
.article-meta{display:flex;gap:18px;font-size:13px;color:var(--ink-faint);margin-top:16px}
.article-cta{
  margin-top:40px;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;text-align:center;
}
.article-cta h3{font-size:20px;margin-bottom:8px}
.article-cta p{font-size:14.5px;margin-bottom:18px}
.related{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:56px}
.related > h3{grid-column:1/-1;font-size:18px;color:var(--ink);margin-bottom:4px}

/* ===== feed-card(通用小卡) ===== */
.feed{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feed-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px;display:flex;flex-direction:column;gap:12px;transition:border-color .15s ease,transform .15s ease;
}
.feed-card:hover{border-color:var(--brand-2);transform:translateY(-3px)}
.feed-card .thumb{border-radius:10px;overflow:hidden;border:1px solid var(--line-soft)}
.feed-card .thumb img{width:100%;aspect-ratio:16/9;object-fit:cover}
.feed-card .body{display:flex;flex-direction:column;gap:6px;min-width:0}
.feed-card .tag{
  align-self:flex-start;font-family:var(--mono);font-size:11px;color:var(--cyan);
  border:1px solid rgba(56,189,248,.28);border-radius:6px;padding:2px 8px;
}
.feed-card h3{font-size:16px;color:var(--ink);line-height:1.45}
.feed-card p{font-size:13.5px}

/* ===== FAQ 折叠(通用) ===== */
.faq-group{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.faq-group h3{font-size:16px;color:var(--cyan);padding:16px 22px 0;margin-bottom:8px}
.faq-item{border-bottom:1px solid var(--line-soft)}
.faq-item:last-child{border-bottom:none}
.faq-item summary{
  cursor:pointer;list-style:none;padding:16px 22px;font-weight:700;color:var(--ink);font-size:15.5px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-body{padding:0 22px 18px;color:var(--ink-dim);font-size:15px}
.faq-body p{color:var(--ink-dim)}

/* ===== CTA 尾条 ===== */
.band{
  padding:80px 0;border-top:1px solid var(--line-soft);
  background:
    radial-gradient(700px 300px at 50% 120%,rgba(32,113,255,.22),transparent 70%),
    var(--bg-2);
}

/* ===== 页脚 ===== */
.footer{border-top:1px solid var(--line);background:var(--bg-2);margin-top:0}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding:56px 20px 40px;
}
.footer-brand img{height:34px;width:auto;margin-bottom:14px}
.footer-brand p{font-size:14px;color:var(--ink-dim);max-width:30em}
.footer-col h4{font-size:13px;color:var(--ink-faint);letter-spacing:.08em;margin-bottom:14px;text-transform:uppercase}
.footer-col a{display:block;color:var(--ink-dim);font-size:14px;margin-bottom:10px}
.footer-col a:hover{color:var(--cyan)}
.copyright{border-top:1px solid var(--line-soft);padding:20px;text-align:center;font-size:13px;color:var(--ink-faint)}

/* ===== 返回顶部 ===== */
.to-top{
  position:fixed;right:22px;bottom:22px;width:44px;height:44px;border-radius:12px;
  background:var(--panel-2);border:1px solid var(--line);color:var(--cyan);font-size:18px;
  cursor:pointer;opacity:0;pointer-events:none;transition:opacity .2s ease;z-index:60;
}
.to-top.show{opacity:1;pointer-events:auto}

/* ===== 正文 prose ===== */
.prose h2{font-size:24px;margin:34px 0 12px}
.prose p{margin-bottom:14px;font-size:16px}
.prose a{color:var(--cyan)}

/* ===== 搜索 / 站点地图 ===== */
.searchbar{display:flex;gap:10px;justify-content:center;margin-top:20px;flex-wrap:wrap}
.searchbar input{
  flex:1 1 320px;max-width:460px;background:var(--panel);border:1px solid var(--line);
  border-radius:10px;padding:13px 18px;color:var(--ink);font-size:15px;outline:none;
}
.searchbar input:focus{border-color:var(--brand-2)}
.search-results{list-style:none;display:grid;gap:10px}
.search-results li{background:var(--panel);border:1px solid var(--line);border-radius:10px;padding:14px 18px}
.search-results a{color:var(--ink);font-weight:600}
.search-results a:hover{color:var(--cyan)}
.search-results .empty{color:var(--ink-faint);text-align:center;padding:24px}
.sitemap-list h3{font-size:18px;margin:24px 0 8px;color:var(--cyan)}
.sitemap-list a{display:inline-block;margin:4px 12px 4px 0;font-size:14.5px;color:var(--ink-dim)}
.sitemap-list a:hover{color:var(--cyan)}
.sitemap-list .sm{font-size:13px;color:var(--ink-faint);margin-bottom:8px}
.hero-sm{padding:56px 0 8px}
.hero-sm h1{font-size:36px}

/* ===== 响应式 ===== */
@media (max-width:960px){
  .hero-console{grid-template-columns:1fr;gap:30px}
  .hero-text h1{font-size:36px}
  .grid-6,.grid-3,.grid-4,.steps,.modes,.feed,.related{grid-template-columns:1fr 1fr}
  .plat-grid{grid-template-columns:1fr 1fr}
  .article-layout{grid-template-columns:1fr}
  .article-toc{position:static}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:620px){
  h1{font-size:30px}
  .hero{padding-top:44px}
  .hero-text h1{font-size:29px}
  .grid-6,.grid-3,.grid-4,.steps,.modes,.feed,.related,.plat-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hud-inner{gap:14px;height:60px}
  .nav-links{overflow-x:auto}
  .status-light{display:none}
  .log-entry{grid-template-columns:1fr;gap:8px}
  .readout{min-width:96px}
}