:root{
  --bg:#0a0e1a; --bg-2:#0f172a; --panel:#111c30; --panel-2:#0d1726;
  --line:#1e3a52; --line-soft:#16263b;
  --text:#e6eef7; --muted:#9fb3c8; --faint:#6f8197;
  --brand:#0b6e9e; --brand-2:#16c2c2; --accent:#36e0c8;
  --tbl-border:#cbd5e1; --tbl-head:#0b3a55; --tbl-zebra:#0e2034;
  --h2-inset:0; /* 面包屑与正文 H2 左缘对齐基线 */
  --topbar-h:60px;
  --radius:14px; --maxw:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:linear-gradient(180deg,var(--bg) 0%,var(--bg-2) 100%);color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:var(--brand-2);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%}
h1,h2,h3,h4{line-height:1.35;font-weight:700}
.rf-h1{font-size:30px;margin:0 0 14px;letter-spacing:.3px}
.rf-lead{color:var(--muted);font-size:17px;margin:0 0 22px}

/* ===== 顶部导航（PC 固定） ===== */
.rf-topbar{position:sticky;top:0;z-index:50;background:rgba(10,14,26,.86);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.rf-topbar__inner{max-width:var(--maxw);margin:0 auto;height:var(--topbar-h);
  display:flex;align-items:center;justify-content:space-between;padding:0 20px}
.rf-brand{font-weight:800;color:var(--text);font-size:18px;letter-spacing:.4px}
.rf-brand:hover{text-decoration:none}
.rf-nav{display:flex;gap:22px}
.rf-nav a{color:var(--muted);font-size:15px;padding:6px 2px}
.rf-nav a:hover,.rf-nav a.is-active{color:var(--accent);text-decoration:none}
.rf-navtoggle{display:none;background:var(--brand);color:#fff;border:0;border-radius:8px;padding:8px 14px;font-size:14px;cursor:pointer}
.rf-mobilenav{display:none;border-bottom:1px solid var(--line);background:var(--panel-2);padding:10px 20px}
.rf-mobilenav a{display:block;color:var(--muted);padding:8px 0;border-bottom:1px solid var(--line-soft)}
.rf-mcat>summary{cursor:pointer;padding:8px 0;color:var(--text)}
.rf-mcat ul{list-style:none;margin:0;padding:0 0 6px 12px}
.rf-mcat li a{display:block;padding:5px 0;color:var(--muted)}

/* ===== 容器与布局 ===== */
.rf-article-layout,.rf-list-layout,.rf-page-wrap,.rf-product-layout{max-width:var(--maxw);margin:0 auto;padding:22px 20px 40px}
.rf-content-main,.rf-cat-content,.rf-page-main{background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);padding:28px 30px}
.layout-grid{display:grid;gap:28px;align-items:start}
.rf-article-layout__grid.layout-grid,.rf-product-layout__grid.layout-grid{grid-template-columns:minmax(0,1fr) 240px}
.rf-list-layout__grid.layout-grid{grid-template-columns:240px minmax(0,1fr)}
.content-main{min-width:0}
@media(max-width:1024px){
  .rf-article-layout__grid.layout-grid,.rf-product-layout__grid.layout-grid,
  .rf-list-layout__grid.layout-grid{grid-template-columns:1fr}
  .rf-cat-aside{order:-1}
}

/* ===== 面包屑（左缘与 H2 对齐） ===== */
.rf-crumbs{margin:0 0 16px;padding-left:var(--h2-inset)}
.rf-crumbs__list{list-style:none;display:flex;flex-wrap:wrap;gap:8px;margin:0;padding:0;font-size:13px;color:var(--faint)}
.rf-crumbs__item:not(:last-child)::after{content:"›";margin-left:8px;color:var(--faint)}
.rf-crumbs__item a{color:var(--muted)}
.rf-crumbs__item span{color:var(--text)}

/* ===== 正文排版 ===== */
.content-main h2,.rf-page-main h2{font-size:22px;margin:34px 0 12px;padding-top:12px;border-top:1px solid var(--line);color:var(--text)}
.content-main h3{font-size:18px;margin:24px 0 10px;color:var(--accent)}
.content-main p{margin:0 0 16px}
.content-main ul,.content-main ol{padding-left:22px;margin:0 0 16px}
.content-main li{margin:6px 0}
.rf-byline{color:var(--faint);font-size:13px;margin:0 0 18px;display:flex;gap:16px;flex-wrap:wrap}
.rf-keywords{background:var(--panel-2);border:1px dashed var(--line);border-radius:10px;
  padding:10px 14px;color:var(--muted);font-size:13px;margin:0 0 20px}
.rf-keywords b{color:var(--accent)}
.rf-conclusion{background:linear-gradient(135deg,rgba(11,110,158,.18),rgba(22,194,194,.12));
  border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin:22px 0}
.rf-conclusion h3{margin-top:0;color:var(--accent)}
.rf-case{background:var(--panel-2);border-left:4px solid var(--brand);border-radius:0 10px 10px 0;
  padding:14px 18px;margin:22px 0;color:var(--muted)}
.rf-case b{color:var(--text)}

/* ===== 表格（覆盖全部正文 table，含 Markdown 裸 table） ===== */
.content-main table,table.data{border-collapse:collapse;width:100%;margin:18px 0;font-size:14px;
  border:1px solid var(--tbl-border)}
.content-main table th,.content-main table td,table.data th,table.data td{
  border:1px solid var(--tbl-border);padding:9px 12px;text-align:left;color:var(--text)}
.content-main table thead th,table.data thead th{background:var(--tbl-head);color:#fff;font-weight:600}
.content-main table tbody tr:nth-child(even),table.data tbody tr:nth-child(even){background:var(--tbl-zebra)}

/* ===== TOC 悬浮（sticky，禁 fixed） ===== */
.rf-toc-aside{position:sticky;top:calc(var(--topbar-h) + 16px);max-height:calc(100vh - 100px);overflow:auto}
.rf-toc-panel,.rf-cat-panel{border:1px solid var(--line);border-radius:12px;background:var(--panel);padding:6px 14px}
.rf-toc-panel__summary,.rf-cat-panel__summary{cursor:pointer;font-weight:600;padding:10px 0;color:var(--accent);
  list-style:none;display:flex;align-items:center;justify-content:space-between}
.rf-toc-panel__summary::after,.rf-cat-panel__summary::after{content:"▾";transition:transform .2s;color:var(--muted)}
.rf-toc-panel[open]>.rf-toc-panel__summary::after,.rf-cat-panel[open]>.rf-cat-panel__summary::after{transform:rotate(180deg)}
.rf-toc-panel__list,.rf-cat-list{list-style:none;margin:6px 0 10px;padding:0}
.rf-toc-panel__li--h3{padding-left:14px;font-size:13px}
.rf-toc-panel__list a,.rf-cat-list a{display:block;padding:5px 0;color:var(--muted);font-size:14px}
.rf-toc-panel__list a:hover,.rf-cat-list a:hover{color:var(--accent);text-decoration:none}
.rf-cat-list__item.is-active a{color:var(--accent);font-weight:600}

/* ===== 分类侧栏（列表页） ===== */
.rf-cat-aside .rf-cat-panel__summary{color:var(--accent)}

/* ===== FAQ（裸 details） ===== */
.rf-faq{margin:30px 0 10px;border-top:1px solid var(--line);padding-top:18px}
.rf-faq__title{font-size:20px;margin:0 0 14px}
.rf-faq__item{border:1px solid var(--line);border-radius:10px;margin:0 0 10px;background:var(--panel-2)}
.rf-faq__q{cursor:pointer;padding:13px 16px;font-weight:600;color:var(--text);list-style:none;display:flex;justify-content:space-between;align-items:center}
.rf-faq__q::after{content:"+";color:var(--brand-2);font-size:18px}
.rf-faq__item[open]>.rf-faq__q::after{content:"−"}
.rf-faq__a{padding:0 16px 14px;color:var(--muted)}

/* ===== 相关阅读 ===== */
.rf-related{margin:30px 0 0;border-top:1px solid var(--line);padding-top:16px}
.rf-related__title{font-size:20px;margin:0 0 12px}
.rf-related__list{list-style:none;margin:0;padding:0}
.rf-related__list li{padding:8px 0;border-bottom:1px solid var(--line-soft)}
.rf-related__why{color:var(--faint);font-size:13px}

/* ===== 卡片网格 ===== */
.rf-card-grid{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.rf-card-grid--home{grid-template-columns:repeat(3,1fr)}
.rf-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);transition:.2s;overflow:hidden}
.rf-card:hover{border-color:var(--brand-2);transform:translateY(-3px)}
.rf-card__link{display:flex;flex-direction:column;gap:8px;padding:18px 20px;height:100%}
.rf-card__cat{font-size:12px;color:var(--brand-2);letter-spacing:.5px}
.rf-card__title{font-size:17px;font-weight:700;color:var(--text)}
.rf-card__desc{font-size:13px;color:var(--muted)}
@media(max-width:860px){.rf-card-grid,.rf-card-grid--home{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.rf-card-grid,.rf-card-grid--home{grid-template-columns:1fr}}

/* ===== 首页 Hero ===== */
.rf-hero{max-width:var(--maxw);margin:0 auto;padding:46px 20px 10px}
.rf-hero__grid{display:grid;grid-template-columns:1.4fr 1fr;gap:34px;align-items:center}
.rf-hero__eyebrow{color:var(--brand-2);letter-spacing:2px;font-size:13px;text-transform:uppercase;margin:0 0 10px}
.rf-hero__title{font-size:40px;margin:0 0 16px;line-height:1.2;
  background:linear-gradient(120deg,#fff,#9fe9e0);-webkit-background-clip:text;background-clip:text;color:transparent}
.rf-hero__sub{color:var(--muted);font-size:17px;max-width:560px}
.rf-hero__cta{display:flex;gap:14px;margin-top:22px}
.rf-hero__stats{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:14px}
.rf-hero__stats li{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:16px}
.rf-hero__num{display:block;font-size:20px;font-weight:800;color:var(--accent)}
.rf-hero__lab{font-size:12px;color:var(--muted)}
@media(max-width:860px){.rf-hero__grid{grid-template-columns:1fr}.rf-hero__title{font-size:30px}}

/* ===== 区块 ===== */
.rf-section{max-width:var(--maxw);margin:0 auto;padding:30px 20px}
.rf-section__head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:18px}
.rf-section__title{font-size:24px;margin:0}
.rf-section__more{color:var(--brand-2);font-size:14px}
.rf-section--dark{background:linear-gradient(135deg,rgba(11,110,158,.12),rgba(22,194,194,.08));
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:20px 0}
.rf-section--dark .rf-section{max-width:var(--maxw);padding:30px 20px}
.rf-scenario{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.rf-scenario__item{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:18px 20px;position:relative}
.rf-scenario__dot{display:inline-block;width:10px;height:10px;border-radius:50%;background:var(--accent);margin-bottom:10px}
.rf-scenario__name{margin:0 0 6px;font-size:17px}
.rf-scenario__desc{margin:0;color:var(--muted);font-size:14px}
@media(max-width:640px){.rf-scenario{grid-template-columns:1fr}}
.rf-band{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;
  background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:26px 30px}
.rf-band__title{margin:0 0 6px;font-size:22px}
.rf-band__sub{margin:0;color:var(--muted)}

/* ===== 按钮 ===== */
.rf-btn{display:inline-block;padding:12px 22px;border-radius:10px;font-weight:600;cursor:pointer}
.rf-btn--primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#04121a;border:0}
.rf-btn--ghost{background:transparent;color:var(--brand-2);border:1px solid var(--brand-2)}
.rf-btn:hover{text-decoration:none;opacity:.92}

/* ===== 页脚 ===== */
.rf-footer{border-top:1px solid var(--line);background:var(--panel-2);margin-top:40px}
.rf-footer__inner{max-width:var(--maxw);margin:0 auto;padding:34px 20px 10px;display:grid;grid-template-columns:2fr 1fr 1fr;gap:24px}
.rf-footer__title{font-size:15px;color:var(--text);margin:0 0 12px}
.rf-footer__col p{color:var(--muted);font-size:14px}
.rf-footer__col ul{list-style:none;margin:0;padding:0}
.rf-footer__col li{padding:5px 0}
.rf-footer__col a{color:var(--muted);font-size:14px}
.rf-footer__copy{text-align:center;color:var(--faint);font-size:13px;padding:14px 20px 24px;margin:0}
@media(max-width:720px){.rf-footer__inner{grid-template-columns:1fr}}

/* ===== 悬浮胶囊 ===== */
.rf-capsule{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:60;
  display:flex;flex-direction:column;gap:6px;padding:8px 6px;border-radius:40px;
  background:linear-gradient(160deg,var(--brand),var(--brand-2));box-shadow:0 8px 30px rgba(0,0,0,.45)}
.rf-capsule__btn{display:flex;flex-direction:column;align-items:center;gap:2px;width:52px;height:52px;
  border:0;background:transparent;color:#04121a;cursor:pointer;border-radius:50%;font-size:11px;font-weight:600}
.rf-capsule__btn:hover{background:rgba(255,255,255,.18)}
.rf-capsule__ico{font-size:18px;line-height:1}
.rf-capsule__txt{font-size:11px;max-width:52px;overflow:hidden;white-space:nowrap;text-overflow:ellipsis}

/* ===== 名片弹层（300×500 容器，原尺寸高清，可滚动） ===== */
.rf-cardmask{position:fixed;inset:0;z-index:80;background:rgba(3,8,16,.7);
  display:flex;align-items:center;justify-content:center;padding:20px}
.rf-cardmask[hidden]{display:none}
.rf-cardbox{position:relative;width:300px;max-height:90vh;background:#fff;border-radius:14px;
  box-shadow:0 20px 60px rgba(0,0,0,.5);overflow:hidden}
.rf-cardbox__close{position:absolute;right:8px;top:8px;z-index:2;width:34px;height:34px;border:0;
  border-radius:50%;background:rgba(0,0,0,.45);color:#fff;font-size:20px;cursor:pointer}
.rf-cardbox__scroll{max-height:90vh;overflow:auto;display:flex;justify-content:center}
.rf-cardbox__img{display:block;width:auto;max-width:none;height:auto}

/* ===== 移动端导航切换 ===== */
@media(max-width:900px){
  .rf-nav{display:none}
  .rf-navtoggle{display:inline-block}
  .rf-mobilenav.is-open{display:block}
  .rf-capsule{right:10px}
}