:root{
  --bg:#f6f8fc;
  --surface:#ffffff;
  --ink:#1f2733;
  --ink-soft:#5b6776;
  --line:#e3e8f0;
  --brand:#4f46e5;
  --brand2:#7c3aed;
  --brand-grad:linear-gradient(120deg,#4f46e5 0%,#7c3aed 60%,#2563eb 100%);
  --accent:#0ea5e9;
  --table-border:#cbd5e1;
  --radius:14px;
  --shadow:0 6px 24px rgba(38,49,71,.08);
  --topbar-h:60px;
  --h2-inset:0px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.75;
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
.container{max-width:1180px;margin:0 auto;padding:0 20px}

/* ===== 顶栏 ===== */
.rf-topbar{position:fixed;top:0;left:0;right:0;height:var(--topbar-h);z-index:50;
  background:rgba(255,255,255,.86);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line)}
.rf-topbar-inner{max-width:1180px;margin:0 auto;height:100%;padding:0 20px;
  display:flex;align-items:center;gap:18px}
.rf-brand{font-weight:800;font-size:18px;background:var(--brand-grad);
  -webkit-background-clip:text;background-clip:text;color:transparent;white-space:nowrap}
.rf-nav{display:flex;gap:18px;margin-left:auto;flex-wrap:wrap}
.rf-nav a{color:var(--ink-soft);font-weight:600;font-size:15px}
.rf-nav a:hover{color:var(--brand);text-decoration:none}
.rf-navtoggle{display:none;background:none;border:1px solid var(--line);border-radius:8px;
  font-size:18px;padding:4px 10px;cursor:pointer;color:var(--ink)}

/* ===== 容器主区 ===== */
main.container{padding-top:calc(var(--topbar-h) + 28px);padding-bottom:48px}
.article-layout,.product-layout,.list-layout,.home-layout{padding-top:calc(var(--topbar-h) + 28px)}
.page-wrap{padding-top:calc(var(--topbar-h) + 36px)}

/* ===== 面包屑 ===== */
.breadcrumb{margin:0 0 14px;font-size:13px;color:var(--ink-soft);
  padding-left:var(--h2-inset)}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0}
.breadcrumb li:not(:last-child)::after{content:"›";margin-left:6px;color:#aab2c0}
.breadcrumb a{color:var(--ink-soft)}
.breadcrumb [aria-current]{color:var(--ink)}

/* ===== 详情栅格 ===== */
.layout-grid{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:36px;align-items:start}
.content-main{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 34px;box-shadow:var(--shadow)}
.doc-title{font-size:30px;line-height:1.3;margin:.1em 0 .3em;letter-spacing:-.01em}
.update-line{color:var(--ink-soft);font-size:13px;margin:0 0 14px}
.content-main h2{font-size:22px;margin:1.6em 0 .7em;padding-bottom:.3em;
  border-bottom:2px solid #eef1f7}
.content-main h3{font-size:18px;margin:1.3em 0 .5em;color:#28324a}
.content-main p{margin:.6em 0}
.content-main ul,.content-main ol{padding-left:1.4em;margin:.5em 0}
.content-main li{margin:.3em 0}
.content-main blockquote{margin:1em 0;padding:12px 16px;background:#f3f5fb;
  border-left:4px solid var(--brand);border-radius:8px;color:#36405a}
.content-main code{background:#eef1f7;padding:1px 6px;border-radius:5px;font-size:.92em}
.content-main hr{border:none;border-top:1px solid var(--line);margin:1.6em 0}

/* ===== 表格边框（覆盖全部正文表格） ===== */
.content-main table,.page-main table,table.param-table{
  width:100%;border-collapse:collapse;margin:1em 0;font-size:14.5px;
  border:1px solid var(--table-border)}
.content-main table th,.page-main table th,table.param-table th{
  background:var(--brand);color:#fff;text-align:left;padding:9px 12px;font-weight:600}
.content-main table td,.page-main table td,table.param-table td{
  border:1px solid var(--table-border);padding:8px 12px}
.content-main table tbody tr:nth-child(even),table.param-table tbody tr:nth-child(even){background:#f7f9fc}

/* ===== TOC ===== */
.toc-aside{position:sticky;top:calc(var(--topbar-h) + 20px);max-height:calc(100vh - 100px);overflow:auto}
.toc-panel,.cat-panel{border:1px solid var(--line);border-radius:12px;background:var(--surface);box-shadow:var(--shadow)}
.toc-panel>summary,.cat-panel>summary{list-style:none;cursor:pointer;font-weight:700;padding:12px 16px;
  display:flex;align-items:center;justify-content:space-between;color:var(--ink)}
.toc-panel>summary::after,.cat-panel>summary::after{content:"▾";color:var(--brand);transition:transform .2s}
.toc-panel[open]>summary::after,.cat-panel[open]>summary::after{transform:rotate(180deg)}
.toc-panel[open]>.toc-list,.cat-panel[open]>.category-list{padding:6px 16px 14px}
.toc-list{list-style:none;margin:0;padding:0}
.toc-list li{margin:4px 0;font-size:13.5px}
.toc-list li.lvl-3{padding-left:14px;font-size:13px;color:var(--ink-soft)}
.toc-list a{color:var(--ink-soft)}
.toc-list a:hover{color:var(--brand)}

/* ===== FAQ ===== */
.faq-block{margin-top:1.8em;border-top:2px dashed var(--line);padding-top:1em}
.faq-title{font-size:20px;margin:.2em 0 .6em}
.faq-item{border:1px solid var(--line);border-radius:10px;margin:.5em 0;background:#fbfcfe}
.faq-item>summary{cursor:pointer;font-weight:600;padding:11px 16px;list-style:none}
.faq-item>summary::before{content:"Q";display:inline-block;width:22px;height:22px;line-height:22px;
  text-align:center;background:var(--brand);color:#fff;border-radius:50%;margin-right:10px;font-size:12px}
.faq-item[open]>summary{color:var(--brand)}
.faq-item p{margin:0;padding:0 16px 14px 48px;color:#36405a}

/* ===== 列表页 ===== */
.list-layout .layout-grid{display:grid;grid-template-columns:240px minmax(0,1fr);gap:30px;align-items:start}
.cat-side{position:sticky;top:calc(var(--topbar-h) + 20px)}
.category-list{list-style:none;margin:0;padding:8px 0}
.category-list li{margin:2px 0}
.category-list a{display:block;padding:9px 16px;border-radius:8px;color:var(--ink-soft);font-weight:600}
.category-list a:hover{background:#eef1f7;color:var(--brand);text-decoration:none}
.category-list a.active{background:var(--brand);color:#fff}
.cat-content{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 30px;box-shadow:var(--shadow)}
.list-title{font-size:26px;margin:.1em 0 .4em;display:flex;align-items:baseline;gap:12px;flex-wrap:wrap}
.list-count{font-size:14px;color:var(--ink-soft);font-weight:500}
.cat-intro{color:var(--ink-soft);margin:.2em 0 1.2em}
.item-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px}
.item-card{border:1px solid var(--line);border-radius:12px;padding:16px 18px;background:#fff;transition:.18s}
.item-card:hover{box-shadow:var(--shadow);transform:translateY(-2px);border-color:#cfd8ea}
.item-title{font-weight:700;font-size:16.5px;color:var(--ink);display:block;margin-bottom:6px}
.item-title:hover{color:var(--brand);text-decoration:none}
.item-desc{color:var(--ink-soft);font-size:14px;margin:0 0 8px}
.item-meta .tag-text{display:inline-block;background:#eef1f7;color:var(--brand);font-size:12px;
  padding:2px 10px;border-radius:999px}
.pagination{display:flex;gap:14px;align-items:center;margin-top:22px;font-size:14px}
.pagination a{font-weight:600}
.page-cur{color:var(--ink-soft)}

/* ===== 叶子页 ===== */
.page-main{max-width:860px;margin:0 auto;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);padding:32px 38px;box-shadow:var(--shadow)}
.page-main h2{font-size:22px;margin:1.4em 0 .6em;border-bottom:2px solid #eef1f7;padding-bottom:.3em}
.page-main h3{font-size:18px;margin:1.1em 0 .4em}
.page-main p{margin:.6em 0}
.page-main ul,.page-main ol{padding-left:1.4em}

/* ===== 首页 ===== */
.rf-hero{padding:36px 0 20px}
.rf-hero-title{font-size:40px;line-height:1.2;margin:0 0 .4em;
  background:var(--brand-grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.rf-hero-sub{max-width:760px;color:var(--ink-soft);font-size:17px;margin:0 0 1.2em}
.rf-hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:1.6em}
.rf-btn{padding:11px 22px;border-radius:999px;font-weight:700;font-size:15px;cursor:pointer}
.rf-btn-primary{background:var(--brand-grad);color:#fff;border:none}
.rf-btn-ghost{background:#fff;color:var(--brand);border:1.5px solid var(--brand)}
.rf-btn:hover{text-decoration:none;opacity:.92}
.rf-hero-stats{display:flex;gap:30px;flex-wrap:wrap}
.rf-hero-stats div{display:flex;flex-direction:column}
.rf-hero-stats strong{font-size:26px;color:var(--brand)}
.rf-hero-stats span{color:var(--ink-soft);font-size:13px}
.rf-section{margin:34px 0}
.rf-section-title{font-size:24px;margin:0 0 .8em}
.rf-section-head{display:flex;align-items:baseline;justify-content:space-between}
.rf-more{font-weight:600;font-size:14px}
.cat-nav-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:14px}
.cat-nav-item{display:flex;flex-direction:column;gap:4px;background:var(--surface);border:1px solid var(--line);
  border-radius:12px;padding:16px 18px;box-shadow:var(--shadow);transition:.18s}
.cat-nav-item:hover{transform:translateY(-2px);border-color:var(--brand);text-decoration:none}
.cat-nav-name{font-weight:700;font-size:17px;color:var(--ink)}
.cat-nav-slug{font-size:12px;color:var(--ink-soft);font-family:monospace}
.rf-keywords .kw-line{color:var(--ink-soft);font-size:15px;line-height:2}
.archive-list{columns:2;column-gap:30px}
.archive-list li{break-inside:avoid;margin:.3em 0}
.rf-404{text-align:center}

/* ===== 页脚 ===== */
.rf-footer{background:#0f172a;color:#c7d0e0;margin-top:40px;padding:36px 0 0}
.rf-footer-inner{max-width:1180px;margin:0 auto;padding:0 20px;display:grid;
  grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px}
.rf-footer h4{color:#fff;font-size:15px;margin:0 0 10px}
.rf-footer p{font-size:13.5px;line-height:1.7;color:#9fb0c9}
.rf-footer ul{list-style:none;margin:0;padding:0}
.rf-footer li{margin:6px 0}
.rf-footer a{color:#9fb0c9;font-size:14px}
.rf-footer a:hover{color:#fff}
.rf-footer-bottom{border-top:1px solid #1e293b;margin-top:26px;padding:16px 20px;text-align:center;
  font-size:12.5px;color:#7e8aa3}

/* ===== 悬浮胶囊 ===== */
.rf-capsule{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:60;
  display:flex;flex-direction:column;gap:10px;
  background:var(--brand-grad);padding:10px 8px;border-radius:999px;box-shadow:0 10px 30px rgba(79,70,229,.4)}
.rf-cap-btn{border:none;background:rgba(255,255,255,.16);color:#fff;width:46px;height:46px;border-radius:50%;
  display:flex;flex-direction:column;align-items:center;justify-content:center;cursor:pointer;gap:1px;transition:.15s}
.rf-cap-btn:hover{background:rgba(255,255,255,.32)}
.rf-cap-ico{font-size:18px;line-height:1}
.rf-cap-txt{font-size:10px;font-weight:600}

.rf-card-mask{position:fixed;inset:0;background:rgba(15,23,42,.6);z-index:70;display:flex;
  align-items:center;justify-content:center;padding:20px}
.rf-card-mask[hidden]{display:none}
.rf-card-pop{position:relative;background:#fff;border-radius:14px;padding:10px;box-shadow:0 20px 60px rgba(0,0,0,.4)}
.rf-card-pop img{display:block;border-radius:8px;width:300px;height:auto}
.rf-card-close{position:absolute;top:-12px;right:-12px;width:32px;height:32px;border-radius:50%;
  border:none;background:#0f172a;color:#fff;font-size:20px;cursor:pointer;line-height:1}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  .layout-grid,.list-layout .layout-grid{grid-template-columns:1fr}
  .toc-aside,.cat-side{position:static;max-height:none}
}
@media (max-width:768px){
  .rf-navtoggle{display:block}
  .rf-nav{display:none;position:absolute;top:var(--topbar-h);left:0;right:0;flex-direction:column;
    background:#fff;border-bottom:1px solid var(--line);padding:10px 20px;gap:4px}
  .rf-nav.open{display:flex}
  .content-main,.cat-content,.page-main{padding:20px 18px}
  .doc-title{font-size:25px}
  .rf-hero-title{font-size:30px}
  .archive-list{columns:1}
  .rf-capsule{right:10px}
}