/* flx- 主题样式 · flex.低损耗电缆.中国 · 暖调浅色 + 铜导体橙 + 护套蓝灰 */
:root{
  --bg:#FAF7F2;
  --bg-soft:#F2ECE2;
  --ink:#1A1D21;
  --ink-soft:#3D3A34;
  --muted:#6B6256;
  --copper:#C2571A;
  --copper-dark:#9E4511;
  --copper-soft:#F0DCC8;
  --bluegray:#5B7C99;
  --line:#E3DACB;
  --line-strong:#CBBFA9;
  --card:#FFFFFF;
  --header-h:64px;
  --h2-inset:0px;
  --maxw:1180px;
  --radius:12px;
  --shadow:0 8px 28px rgba(40,28,12,.08);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,sans-serif;
  font-size:17px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
a{color:var(--copper);text-decoration:none;}
a:hover{color:var(--copper-dark);text-decoration:underline;}
img{max-width:100%;}
.flx-container{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.flx-main{padding-top:calc(var(--header-h) + 28px);padding-bottom:56px;min-height:60vh;}

/* ===== 顶部固定导航 ===== */
.flx-header{position:fixed;top:0;left:0;right:0;height:var(--header-h);z-index:50;
  background:rgba(250,247,242,.92);backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--line);}
.flx-header-inner{max-width:var(--maxw);margin:0 auto;padding:0 24px;height:100%;
  display:flex;align-items:center;gap:24px;}
.flx-logo{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;}
.flx-logo:hover{text-decoration:none;}
.flx-logo-mark{width:22px;height:22px;border-radius:6px;
  background:linear-gradient(135deg,var(--copper),var(--bluegray));}
.flx-logo-text{font-size:18px;letter-spacing:.3px;}
.flx-nav{flex:1;display:flex;justify-content:flex-end;}
.flx-nav>ul{display:flex;gap:6px;list-style:none;margin:0;padding:0;align-items:center;}
.flx-nav>ul>li>a{display:inline-block;padding:8px 12px;border-radius:8px;color:var(--ink-soft);
  font-size:15px;font-weight:600;}
.flx-nav>ul>li>a:hover,.flx-nav>ul>li>a.active{background:var(--copper-soft);color:var(--copper-dark);text-decoration:none;}
.flx-nav-sub{display:none;}
.flx-nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px;}
.flx-nav-toggle span{width:24px;height:2px;background:var(--ink);border-radius:2px;}

/* ===== 面包屑 ===== */
.flx-breadcrumb{margin:0 0 18px;padding:0;}
.flx-breadcrumb-list{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0;font-size:14px;color:var(--muted);}
.flx-breadcrumb-list li{display:flex;align-items:center;}
.flx-breadcrumb-list li:not(:last-child)::after{content:"›";margin:0 6px;color:var(--line-strong);}
.flx-breadcrumb-list a{color:var(--muted);}
.flx-breadcrumb-list a:hover{color:var(--copper);}
.flx-breadcrumb-list [aria-current="page"]{color:var(--ink);font-weight:600;}

/* ===== 文章/产品详情布局 ===== */
.flx-article-layout{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:40px;align-items:start;}
.flx-content-main{min-width:0;}
.flx-article-head{margin-bottom:18px;padding-bottom:14px;border-bottom:2px solid var(--copper);}
.flx-h1{font-size:30px;line-height:1.3;margin:0 0 12px;color:var(--ink);}
.flx-article-meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;font-size:14px;color:var(--muted);}
.flx-cat-tag{background:var(--copper);color:#fff;padding:3px 10px;border-radius:20px;font-size:13px;font-weight:600;}
.flx-status-tag{background:var(--bluegray);color:#fff;padding:3px 10px;border-radius:20px;font-size:13px;}
.flx-sku-tag{background:var(--bg-soft);color:var(--ink-soft);padding:3px 10px;border-radius:20px;font-size:13px;}

/* ===== 正文排版 ===== */
.flx-prose h2{font-size:23px;line-height:1.4;margin:34px 0 14px;color:var(--ink);
  padding-left:14px;border-left:4px solid var(--copper);scroll-margin-top:calc(var(--header-h) + 20px);}
.flx-prose h3{font-size:19px;margin:26px 0 10px;color:var(--ink-soft);scroll-margin-top:calc(var(--header-h) + 20px);}
.flx-prose p{margin:0 0 16px;color:var(--ink-soft);}
.flx-prose ul,.flx-prose ol{margin:0 0 16px;padding-left:22px;color:var(--ink-soft);}
.flx-prose li{margin:6px 0;}
.flx-prose strong{color:var(--ink);}
.flx-prose blockquote{margin:18px 0;padding:12px 16px;background:var(--bg-soft);border-left:4px solid var(--bluegray);
  border-radius:0 8px 8px 0;color:var(--ink-soft);}
.flx-prose blockquote strong{color:var(--copper-dark);}
.flx-prose .flx-keywords{display:flex;flex-wrap:wrap;gap:8px;margin:14px 0 8px;}
.flx-tag{background:var(--copper-soft);color:var(--copper-dark);padding:3px 10px;border-radius:6px;font-size:13px;}

/* 表格：同时覆盖 .flx-spec 与正文裸 table（M26） */
.flx-prose table,.flx-spec{width:100%;border-collapse:collapse;margin:18px 0;font-size:15px;
  border:1px solid var(--line-strong);background:var(--card);}
.flx-prose table th,.flx-spec th{background:var(--bluegray);color:#fff;text-align:left;padding:10px 12px;border:1px solid var(--line-strong);}
.flx-prose table td,.flx-spec td{padding:9px 12px;border:1px solid var(--line-strong);color:var(--ink-soft);}
.flx-prose table tr:nth-child(even) td,.flx-spec tr:nth-child(even) td{background:var(--bg-soft);}

/* 实践经验 callout */
.flx-case{margin:20px 0;padding:14px 16px;background:#FBF1E6;border:1px solid var(--copper-soft);
  border-radius:8px;color:var(--ink-soft);font-size:15px;}
.flx-case strong{color:var(--copper-dark);}

/* ===== 目录悬浮面板 ===== */
.flx-toc-aside{position:sticky;top:calc(var(--header-h) + 20px);max-height:calc(100vh - var(--header-h) - 40px);overflow:auto;}
.flx-toc-panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:12px 14px;box-shadow:var(--shadow);}
.flx-toc-panel summary{cursor:pointer;font-weight:700;color:var(--ink);padding:2px 0 8px;border-bottom:1px solid var(--line);margin-bottom:8px;list-style:none;}
.flx-toc-panel summary::-webkit-details-marker{display:none;}
.flx-toc-panel summary::after{content:"▾";float:right;color:var(--copper);}
.flx-toc-panel[open] summary::after{content:"▴";}
.flx-toc-panel ol{list-style:none;margin:0;padding:0;counter-reset:toc;}
.flx-toc-panel li{margin:7px 0;font-size:14px;counter-increment:toc;}
.flx-toc-panel li a{color:var(--ink-soft);display:block;padding-left:22px;position:relative;}
.flx-toc-panel li a::before{content:counter(toc);position:absolute;left:0;color:var(--copper);font-weight:700;}
.flx-toc-panel li a:hover{color:var(--copper);text-decoration:none;}

/* FAQ 裸 details */
.flx-prose details{border:1px solid var(--line);border-radius:10px;margin:14px 0;background:var(--card);overflow:hidden;}
.flx-prose details summary{cursor:pointer;padding:13px 16px;font-weight:600;color:var(--ink);background:var(--bg-soft);list-style:none;}
.flx-prose details summary::-webkit-details-marker{display:none;}
.flx-prose details summary::after{content:"+";float:right;color:var(--copper);font-weight:700;font-size:18px;}
.flx-prose details[open] summary::after{content:"−";}
.flx-prose details[open] summary{border-bottom:1px solid var(--line);}
.flx-prose details .flx-faq-a{padding:12px 16px;color:var(--ink-soft);}

/* 相关阅读/产品 */
.flx-related{margin-top:30px;padding-top:18px;border-top:2px solid var(--line);}
.flx-related-h{font-size:20px;margin:0 0 12px;color:var(--ink);}
.flx-related ul{list-style:none;padding:0;margin:0;}
.flx-related li{margin:10px 0;padding-left:18px;position:relative;color:var(--ink-soft);}
.flx-related li::before{content:"→";position:absolute;left:0;color:var(--copper);}

/* ===== 列表/分类页 ===== */
.flx-list-layout{margin-top:4px;}
.flx-layout-grid{display:grid;grid-template-columns:240px minmax(0,1fr);gap:36px;align-items:start;}
.flx-cat-side{position:sticky;top:calc(var(--header-h) + 20px);}
.flx-cat-panel{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:12px 14px;box-shadow:var(--shadow);}
.flx-cat-panel summary{cursor:pointer;font-weight:700;padding:2px 0 8px;border-bottom:1px solid var(--line);margin-bottom:8px;list-style:none;}
.flx-cat-panel summary::-webkit-details-marker{display:none;}
.flx-cat-panel summary::after{content:"▾";float:right;color:var(--copper);}
.flx-cat-panel[open] summary::after{content:"▴";}
.category-list{list-style:none;margin:0;padding:0;}
.category-list li{margin:4px 0;}
.category-list li a{display:flex;justify-content:space-between;align-items:center;padding:8px 10px;border-radius:8px;color:var(--ink-soft);font-size:15px;}
.category-list li a:hover{background:var(--copper-soft);color:var(--copper-dark);text-decoration:none;}
.category-list li.active a{background:var(--copper);color:#fff;font-weight:600;}
.flx-cat-count{font-size:12px;background:var(--bg-soft);color:var(--muted);padding:1px 7px;border-radius:10px;}
.category-list li.active .flx-cat-count{background:rgba(255,255,255,.25);color:#fff;}
.flx-list-intro{color:var(--muted);margin:0 0 18px;}
.flx-item-list{list-style:none;margin:0;padding:0;}
.flx-item-row{padding:18px 0;border-bottom:1px solid var(--line);}
.flx-item-title{font-size:19px;font-weight:700;color:var(--ink);}
.flx-item-title:hover{color:var(--copper);text-decoration:none;}
.flx-item-summary{margin:6px 0;color:var(--muted);font-size:15px;}
.flx-item-meta{display:flex;gap:12px;align-items:center;font-size:13px;color:var(--muted);}

/* ===== 页面卡片 ===== */
.flx-page-wrap{margin-top:4px;}
.flx-page-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:36px 40px;box-shadow:var(--shadow);max-width:880px;margin:0 auto;}
.flx-page-card h2{font-size:22px;margin:28px 0 12px;color:var(--ink);padding-left:14px;border-left:4px solid var(--copper);}
.flx-page-card h3{font-size:18px;margin:20px 0 8px;color:var(--ink-soft);}
.flx-404{text-align:center;}
.flx-contact-cta{margin-top:26px;padding:20px;border:1px dashed var(--copper);border-radius:10px;background:#FBF1E6;text-align:center;}
.flx-contact-note{color:var(--ink-soft);margin:0 0 14px;}

/* ===== 按钮 ===== */
.flx-btn{display:inline-block;padding:11px 22px;border-radius:24px;background:var(--bg-soft);color:var(--ink);
  font-weight:600;border:1px solid var(--line-strong);}
.flx-btn:hover{text-decoration:none;background:var(--copper-soft);color:var(--copper-dark);}
.flx-btn-primary{background:var(--copper);color:#fff;border-color:var(--copper);}
.flx-btn-primary:hover{background:var(--copper-dark);color:#fff;}

/* ===== 首页 ===== */
.flx-hero{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:center;
  background:linear-gradient(135deg,#FFFDF9,var(--bg-soft));border:1px solid var(--line);
  border-radius:18px;padding:44px;margin-bottom:48px;}
.flx-hero-kicker{color:var(--copper);font-weight:700;letter-spacing:1px;margin:0 0 8px;font-size:14px;}
.flx-hero-title{font-size:40px;line-height:1.2;margin:0 0 16px;color:var(--ink);}
.flx-hero-lead{color:var(--ink-soft);font-size:17px;margin:0 0 22px;}
.flx-hero-actions{display:flex;gap:14px;flex-wrap:wrap;}
.flx-hero-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:var(--shadow);}
.flx-hero-card-h{font-size:16px;margin:0 0 14px;color:var(--copper-dark);border-bottom:1px solid var(--line);padding-bottom:8px;}
.flx-hero-card-list{list-style:none;margin:0;padding:0;}
.flx-hero-card-list li{display:flex;flex-direction:column;gap:3px;padding:10px 0;border-bottom:1px dashed var(--line);}
.flx-hero-card-list li span{font-size:13px;color:var(--muted);}
.flx-hero-card-list li b{font-size:14px;color:var(--ink);font-weight:600;}
.flx-section{margin-bottom:48px;}
.flx-section-h{font-size:26px;margin:0 0 22px;color:var(--ink);padding-left:14px;border-left:4px solid var(--copper);}
.flx-prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.flx-prod-cell{display:flex;flex-direction:column;gap:8px;padding:22px;background:var(--card);
  border:1px solid var(--line);border-top:3px solid var(--copper);border-radius:12px;color:var(--ink);
  box-shadow:var(--shadow);transition:transform .15s ease;}
.flx-prod-cell:hover{transform:translateY(-3px);text-decoration:none;color:var(--ink);}
.flx-prod-ico{width:34px;height:34px;border-radius:8px;background:linear-gradient(135deg,var(--copper),var(--bluegray));}
.flx-prod-name{font-size:17px;font-weight:700;}
.flx-prod-go{font-size:14px;color:var(--copper);}
.flx-keyword-cloud{display:flex;flex-wrap:wrap;gap:10px;}
.flx-kw{background:var(--bg-soft);border:1px solid var(--line);color:var(--ink-soft);
  padding:7px 14px;border-radius:20px;font-size:14px;}
.flx-baseline-note{color:var(--muted);font-size:15px;margin-top:14px;}
.flx-app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.flx-app-cell{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:20px;box-shadow:var(--shadow);}
.flx-app-h{font-size:17px;margin:0 0 8px;color:var(--copper-dark);}
.flx-app-p{color:var(--ink-soft);font-size:15px;margin:0;}
.flx-archive-list{columns:2;list-style:none;padding:0;margin:0 0 8px;}
.flx-archive-list li{margin:5px 0;break-inside:avoid;}

/* ===== 页脚 ===== */
.flx-footer{background:#201A12;color:#E9E1D4;border-top:4px solid var(--copper);}
.flx-footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px;padding:42px 24px;}
.flx-footer-logo{font-size:19px;font-weight:700;color:#fff;}
.flx-footer-tag{color:#B8A98F;font-size:14px;margin:10px 0 0;}
.flx-footer-col h4{font-size:15px;color:var(--copper);margin:0 0 12px;}
.flx-footer-col ul{list-style:none;margin:0;padding:0;}
.flx-footer-col li{margin:7px 0;}
.flx-footer-col a{color:#D8CDBB;font-size:14px;}
.flx-footer-col a:hover{color:#fff;}
.flx-footer-bottom{background:#16110A;padding:14px 0;font-size:13px;color:#9C8E78;}
.flx-footer-bottom .flx-container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px;}

/* ===== 悬浮胶囊 ===== */
.flx-capsule{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:60;
  display:flex;flex-direction:column;gap:10px;}
.flx-capsule-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  width:56px;height:56px;border-radius:30px;border:0;cursor:pointer;color:#fff;
  background:linear-gradient(135deg,var(--copper),var(--copper-dark));
  box-shadow:0 6px 18px rgba(158,69,17,.4);font-size:11px;font-weight:600;}
.flx-capsule-btn.flx-capsule-mail{background:linear-gradient(135deg,var(--bluegray),#3E5A73);box-shadow:0 6px 18px rgba(62,90,115,.4);}
.flx-capsule-ico{font-size:18px;line-height:1;}
.flx-capsule-btn:hover{transform:scale(1.06);text-decoration:none;color:#fff;}

/* 名片浮层 */
.flx-card-overlay{position:fixed;inset:0;z-index:80;background:rgba(26,21,12,.55);
  display:flex;align-items:center;justify-content:center;padding:20px;}
.flx-card-overlay[hidden]{display:none !important;}
.flx-card-frame{position:relative;background:#fff;border-radius:12px;padding:10px;box-shadow:0 20px 60px rgba(0,0,0,.4);}
.flx-card-img{display:block;width:300px;height:500px;object-fit:contain;}
.flx-card-close{position:absolute;top:-14px;right:-14px;width:34px;height:34px;border-radius:50%;
  border:0;background:#201A12;color:#fff;font-size:20px;cursor:pointer;line-height:1;}

/* ===== 响应式：≤1024 手机端 ===== */
@media (max-width:1024px){
  .flx-article-layout{grid-template-columns:1fr;gap:20px;}
  .flx-toc-aside{position:static;max-height:none;}
  .flx-list-layout .flx-layout-grid{grid-template-columns:1fr;}
  .flx-cat-side{position:static;}
  .flx-hero{grid-template-columns:1fr;padding:28px;}
  .flx-hero-title{font-size:32px;}
  .flx-prod-grid,.flx-app-grid{grid-template-columns:1fr 1fr;}
  .flx-footer-inner{grid-template-columns:1fr 1fr;}
  .flx-archive-list{columns:1;}
  .flx-nav{position:absolute;top:var(--header-h);right:0;left:0;background:var(--bg);
    border-bottom:1px solid var(--line);flex-direction:column;padding:12px 24px;display:none;}
  .flx-nav.open{display:flex;}
  .flx-nav>ul{flex-direction:column;align-items:stretch;width:100%;}
  .flx-nav>ul>li>a{display:block;}
  .flx-nav-sub{display:block;margin-top:10px;border-top:1px solid var(--line);padding-top:10px;}
  .flx-nav-sub-title{display:block;font-size:13px;color:var(--muted);margin:8px 0 4px;font-weight:700;}
  .flx-nav-sub ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px;}
  .flx-nav-sub li a{display:inline-block;padding:5px 10px;background:var(--bg-soft);border-radius:8px;font-size:13px;color:var(--ink-soft);}
  .flx-nav-toggle{display:flex;}
  .flx-page-card{padding:24px 18px;}
}
@media (max-width:640px){
  .flx-prod-grid,.flx-app-grid,.flx-footer-inner{grid-template-columns:1fr;}
  body{font-size:16px;}
  .flx-card-img{width:240px;height:400px;}
}