/* fkr- 主题样式 —— 浅底 + 墨蓝 + 信号橙 + 链路青（原创，与既有站点零复用） */
:root{
  --bg:#F6F8FB;
  --surface:#FFFFFF;
  --ink:#0C1A2C;
  --ink-soft:#33425A;
  --orange:#E8602C;
  --teal:#1FA8A0;
  --steel:#5B6B7E;
  --line:#D7DEE7;
  --line-strong:#C2CCDA;
  --radius:12px;
  --shadow:0 6px 24px rgba(12,26,44,.08);
  --h2-inset:16px;          /* 面包屑与正文 H2 左缘对齐基准 */
  --maxw:1180px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
a{color:var(--teal);text-decoration:none;}
a:hover{color:var(--orange);}
img{max-width:100%;display:block;}

/* ===== 容器与对齐 ===== */
.fkr-container{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.fkr-breadcrumb{padding:16px 0 0;font-size:13px;color:var(--steel);}
.fkr-breadcrumb ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:6px;align-items:center;}
.fkr-breadcrumb li{display:inline-flex;align-items:center;}
.fkr-breadcrumb li:not(:last-child)::after{content:"›";margin-left:6px;color:var(--line-strong);}
.fkr-breadcrumb a{color:var(--steel);}
.fkr-breadcrumb span{color:var(--ink);font-weight:600;}

/* ===== 顶部导航 ===== */
.fkr-header{position:sticky;top:0;z-index:50;background:rgba(12,26,44,.96);backdrop-filter:saturate(140%) blur(6px);color:#fff;}
.fkr-header-inner{max-width:var(--maxw);margin:0 auto;padding:0 24px;height:60px;display:flex;align-items:center;gap:18px;}
.fkr-logo{font-weight:800;font-size:19px;color:#fff;letter-spacing:.5px;white-space:nowrap;}
.fkr-logo:hover{color:var(--orange);}
.fkr-nav-toggle{display:none;background:none;border:1px solid rgba(255,255,255,.4);color:#fff;font-size:22px;line-height:1;width:40px;height:36px;border-radius:8px;cursor:pointer;}
.fkr-nav-list{list-style:none;display:flex;gap:4px;margin:0;padding:0;align-items:center;}
.fkr-nav-list>li{position:relative;}
.fkr-nav-list>li>a{display:block;padding:8px 12px;color:#E6ECF3;border-radius:8px;font-size:15px;}
.fkr-nav-list>li>a:hover{background:rgba(255,255,255,.08);color:#fff;}
.fkr-has-menu>.fkr-submenu{position:absolute;top:100%;left:0;min-width:160px;background:#fff;color:var(--ink);
  list-style:none;margin:0;padding:6px 0;border-radius:10px;box-shadow:var(--shadow);display:none;}
.fkr-has-menu:hover>.fkr-submenu{display:block;}
.fkr-submenu li a{display:block;padding:8px 16px;color:var(--ink-soft);font-size:14px;}
.fkr-submenu li a:hover{background:var(--bg);color:var(--orange);}
.fkr-nav-mobile{display:flex;flex-direction:column;background:#0C1A2C;border-top:1px solid rgba(255,255,255,.12);padding:10px 24px 16px;}
.fkr-nav-mobile[hidden]{display:none;}
.fkr-nav-mobile a{padding:10px 0;color:#E6ECF3;font-size:16px;border-bottom:1px solid rgba(255,255,255,.06);}
.fkr-nav-mobile .fkr-mobile-cat summary{padding:10px 0;font-size:16px;color:#E6ECF3;cursor:pointer;}
.fkr-nav-mobile .fkr-mobile-cat ul{list-style:none;margin:0 0 6px;padding:0 0 0 14px;}
.fkr-nav-mobile .fkr-mobile-cat ul li a{border:none;padding:6px 0;font-size:14px;color:#B7C2D2;}

/* ===== 按钮 ===== */
.fkr-btn{display:inline-block;padding:11px 22px;border-radius:999px;font-weight:600;font-size:15px;cursor:pointer;}
.fkr-btn-primary{background:var(--orange);color:#fff;box-shadow:0 6px 18px rgba(232,96,44,.32);}
.fkr-btn-primary:hover{background:#cf5223;color:#fff;}
.fkr-btn-ghost{border:1.5px solid var(--teal);color:var(--teal);}
.fkr-btn-ghost:hover{border-color:var(--orange);color:var(--orange);}

/* ===== 首页 ===== */
.fkr-hero{padding:54px 0 30px;}
.fkr-hero-title{font-size:40px;font-weight:800;margin:0 0 14px;letter-spacing:.5px;}
.fkr-hero-sub{font-size:18px;color:var(--ink-soft);max-width:820px;margin:0 0 22px;}
.fkr-hero-cta{display:flex;gap:14px;flex-wrap:wrap;}
.fkr-section-title{font-size:24px;margin:34px 0 16px;padding-left:12px;border-left:5px solid var(--orange);}
.fkr-pillar-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.fkr-pillar{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);}
.fkr-pillar-no{display:inline-block;font-weight:800;color:var(--teal);font-size:14px;letter-spacing:1px;}
.fkr-pillar h3{margin:8px 0 8px;font-size:18px;}
.fkr-pillar p{margin:0;color:var(--ink-soft);font-size:14px;line-height:1.7;}
.fkr-cat-chips{list-style:none;display:flex;flex-wrap:wrap;gap:10px;margin:0;padding:0;}
.fkr-cat-chips li a{display:inline-block;padding:9px 16px;background:var(--surface);border:1px solid var(--line);border-radius:999px;color:var(--ink);font-size:14px;}
.fkr-cat-chips li a:hover{border-color:var(--orange);color:var(--orange);}
.fkr-feature-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,1fr);gap:14px;}
.fkr-feature-list li{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;}
.fkr-feature-list a{font-weight:700;font-size:16px;}
.fkr-feature-list p{margin:8px 0 0;color:var(--ink-soft);font-size:14px;}

/* ===== 详情页栅格（内容在前，TOC 在后）===== */
.fkr-article-layout{padding-bottom:40px;}
.fkr-layout-grid{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:32px;align-items:start;margin-top:18px;}
.fkr-content-main{min-width:0;}
.fkr-h1{font-size:30px;line-height:1.35;margin:8px 0 6px;}
.fkr-updated{font-size:13px;color:var(--steel);margin:0 0 14px;}
.fkr-updated time{font-style:normal;}

/* 摘要 / 关键词 / 标签 */
.fkr-summary{background:linear-gradient(180deg,#FFF6F1,#FFFFFF);border:1px solid #F3D9CB;border-left:4px solid var(--orange);
  border-radius:10px;padding:14px 16px;color:var(--ink-soft);font-size:15px;margin:0 0 14px;}
.fkr-keywords{margin:0 0 18px;display:flex;flex-wrap:wrap;gap:8px;}
.fkr-tag-text{display:inline-block;background:var(--bg);border:1px solid var(--line);border-radius:999px;padding:3px 11px;font-size:13px;color:var(--ink-soft);}
.fkr-product-meta{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 14px;}

/* 正文排版 */
.fkr-content-main h2{font-size:22px;margin:30px 0 12px;padding-top:6px;color:var(--ink);scroll-margin-top:80px;}
.fkr-content-main h3{font-size:18px;margin:22px 0 10px;color:var(--ink);}
.fkr-content-main p{margin:0 0 14px;color:var(--ink-soft);}
.fkr-content-main ul,.fkr-content-main ol{margin:0 0 14px;padding-left:22px;color:var(--ink-soft);}
.fkr-content-main li{margin:6px 0;}
.fkr-content-main strong{color:var(--ink);}
.fkr-content-main blockquote{margin:0 0 16px;padding:12px 16px;background:var(--bg);border-left:4px solid var(--teal);border-radius:8px;color:var(--ink-soft);}
.fkr-content-main blockquote p{margin:0;}
.fkr-conclusion{background:#EAF7F5;border-color:var(--teal);border-left:4px solid var(--teal);}
.fkr-conclusion strong{color:#0E6E68;}

/* 表格：覆盖类名表与裸表（M26） */
.fkr-content-main table,.fkr-page-main table,table.fkr-spec{
  width:100%;border-collapse:collapse;margin:0 0 18px;font-size:14px;background:var(--surface);
  border:1px solid #cbd5e1;border-radius:8px;overflow:hidden;}
.fkr-content-main table th,.fkr-page-main table th,table.fkr-spec th{
  background:var(--ink);color:#fff;text-align:left;padding:10px 12px;font-weight:600;}
.fkr-content-main table td,.fkr-page-main table td,table.fkr-spec td{
  border:1px solid #cbd5e1;padding:9px 12px;color:var(--ink-soft);}
.fkr-content-main table tr:nth-child(even) td,.fkr-page-main table tr:nth-child(even) td,table.fkr-spec tr:nth-child(even) td{
  background:#F2F6FA;}

/* 结论块引用强调在 blockquote.fkr-conclusion，无需额外 */

/* 相关阅读 / 相关产品 */
.fkr-related{margin-top:30px;padding-top:18px;border-top:1px solid var(--line);}
.fkr-related-title{font-size:20px;margin:0 0 12px;}
.fkr-related-list{list-style:none;margin:0;padding:0;}
.fkr-related-list li{margin:8px 0;padding-left:16px;position:relative;color:var(--ink-soft);}
.fkr-related-list li::before{content:"→";position:absolute;left:0;color:var(--orange);}

/* TOC 侧栏（原生 details，sticky） */
.fkr-toc-aside{position:sticky;top:80px;max-height:calc(100vh - 100px);overflow-y:auto;}
.fkr-toc-panel{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:10px 12px;}
.fkr-toc-panel summary{cursor:pointer;font-weight:700;font-size:14px;color:var(--ink);list-style:none;}
.fkr-toc-panel summary::-webkit-details-marker{display:none;}
.fkr-toc-panel summary::after{content:"▾";float:right;color:var(--steel);}
.fkr-toc-panel[open] summary::after{content:"▴";}
.fkr-toc-nav ul{list-style:none;margin:8px 0 0;padding:0;}
.fkr-toc-nav li{margin:6px 0;}
.fkr-toc-nav a{font-size:13px;color:var(--ink-soft);}
.fkr-toc-nav a:hover{color:var(--orange);}

/* ===== 列表 / 分类页（侧栏在前）===== */
.fkr-list-layout{padding-bottom:40px;}
.fkr-list-layout .fkr-layout-grid{display:grid;grid-template-columns:240px minmax(0,1fr);gap:28px;align-items:start;margin-top:18px;}
.fkr-cat-side{position:sticky;top:80px;}
.fkr-cat-panel{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:10px 12px;}
.fkr-cat-panel summary{cursor:pointer;font-weight:700;font-size:15px;color:var(--ink);list-style:none;}
.fkr-cat-panel summary::-webkit-details-marker{display:none;}
.fkr-cat-panel summary::after{content:"▾";float:right;color:var(--steel);}
.fkr-cat-panel[open] summary::after{content:"▴";}
.fkr-category-list{list-style:none;margin:8px 0 0;padding:0;}
.fkr-category-list li{margin:4px 0;border-radius:8px;}
.fkr-category-list li a{display:block;padding:8px 10px;color:var(--ink-soft);border-radius:8px;font-size:14px;}
.fkr-category-list li.active a,.fkr-category-list li a:hover{background:var(--orange);color:#fff;}
.fkr-list-intro{color:var(--ink-soft);margin:0 0 18px;}
.fkr-item-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,1fr);gap:14px;}
.fkr-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow);}
.fkr-item-title{font-weight:700;font-size:17px;}
.fkr-item-cat{display:inline-block;margin:6px 0;font-size:12px;color:var(--teal);background:#EAF7F5;border-radius:999px;padding:2px 10px;}
.fkr-item-sum{margin:6px 0 0;color:var(--ink-soft);font-size:14px;}

/* ===== 叶子页 ===== */
.fkr-page-wrap{padding-bottom:40px;}
.fkr-page-main{max-width:860px;margin:18px auto 0;}
.fkr-page-main h2{font-size:22px;margin:28px 0 12px;padding-left:12px;border-left:5px solid var(--teal);}
.fkr-page-main h3{font-size:18px;margin:20px 0 10px;}
.fkr-page-main p{color:var(--ink-soft);margin:0 0 14px;}

/* ===== 归档 ===== */
.fkr-archive-sec{margin-bottom:26px;}
.fkr-archive-cat{font-size:17px;margin:16px 0 8px;color:var(--orange);}
.fkr-archive-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:8px 18px;}
.fkr-archive-list a{color:var(--ink-soft);font-size:14px;}
.fkr-404{text-align:center;padding:60px 0;}

/* ===== 悬浮胶囊 ===== */
.fkr-float{position:fixed;right:18px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:10px;z-index:60;}
.fkr-float-btn{width:52px;height:52px;border:none;border-radius:14px;background:linear-gradient(135deg,var(--orange),var(--teal));
  color:#fff;display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;box-shadow:var(--shadow);gap:2px;}
.fkr-float-btn:hover{filter:brightness(1.06);}
.fkr-float-ico{font-size:18px;line-height:1;}
.fkr-float-txt{font-size:11px;}
.fkr-card-overlay{position:fixed;inset:0;background:rgba(12,26,44,.6);display:flex;align-items:center;justify-content:center;z-index:70;}
.fkr-card-overlay[hidden]{display:none;}
.fkr-card-box{position:relative;background:#fff;padding:8px;border-radius:10px;}
.fkr-card-img{width:300px;height:500px;object-fit:contain;border-radius:6px;}
.fkr-card-close{position:absolute;top:-14px;right:-14px;width:34px;height:34px;border-radius:50%;border:none;background:#fff;color:var(--ink);font-size:20px;cursor:pointer;box-shadow:var(--shadow);}

/* ===== 页脚 ===== */
.fkr-footer{background:var(--ink);color:#C7D2E0;margin-top:40px;}
.fkr-footer-inner{max-width:var(--maxw);margin:0 auto;padding:30px 24px;display:flex;flex-wrap:wrap;gap:24px;justify-content:space-between;}
.fkr-footer-logo{font-weight:800;color:#fff;font-size:18px;}
.fkr-footer-tag{margin:6px 0 0;font-size:14px;color:#9FB0C4;}
.fkr-footer-nav{display:flex;flex-wrap:wrap;gap:8px 16px;}
.fkr-footer-nav a{color:#C7D2E0;font-size:14px;}
.fkr-footer-nav a:hover{color:var(--orange);}
.fkr-footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:14px 24px;text-align:center;font-size:13px;color:#8A9BB0;}

/* ===== 响应式：≤1024 折叠 ===== */
@media (max-width:1024px){
  .fkr-nav-toggle{display:block;}
  .fkr-nav{display:none;}
  .fkr-hero-title{font-size:30px;}
  .fkr-pillar-grid{grid-template-columns:repeat(2,1fr);}
  .fkr-feature-list{grid-template-columns:1fr;}
  /* 详情页与列表页栅格折叠为单列；保留可点击折叠入口（不 display:none） */
  .fkr-layout-grid{grid-template-columns:1fr;}
  .fkr-list-layout .fkr-layout-grid{grid-template-columns:1fr;}
  .fkr-toc-aside{position:static;max-height:none;}
  .fkr-cat-side{position:static;}
  .fkr-item-list{grid-template-columns:1fr;}
  .fkr-archive-list{grid-template-columns:1fr 1fr;}
  .fkr-float{right:10px;}
}
@media (max-width:560px){
  .fkr-pillar-grid{grid-template-columns:1fr;}
  .fkr-archive-list{grid-template-columns:1fr;}
  .fkr-card-img{width:260px;height:433px;}
}