:root{
  --fus-bg:#0b0f1a;
  --fus-bg2:#0f1626;
  --fus-surface:#121a2b;
  --fus-surface2:#16203450;
  --fus-line:#223150;
  --fus-text:#e8eef7;
  --fus-muted:#9db0c9;
  --fus-cyan:#23e6c9;
  --fus-blue:#5b9dff;
  --fus-amber:#ffb23e;
  --fus-danger:#ff6b81;
  --fus-h2-inset:16px;
  --h2-inset:16px;
  --fus-radius:14px;
  --fus-topbar:62px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;padding-top:var(--fus-topbar);
  font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,sans-serif;
  background:var(--fus-bg);color:var(--fus-text);line-height:1.75;font-size:16px;
}
a{color:var(--fus-blue);text-decoration:none;}
a:hover{color:var(--fus-cyan);}
img{max-width:100%;}
.tag-text{display:inline-block;background:var(--fus-surface);border:1px solid var(--fus-line);color:var(--fus-muted);font-size:12px;padding:1px 8px;border-radius:999px;margin:2px 4px 2px 0;}

/* ===== 顶部导航 ===== */
.fus-header{position:fixed;top:0;left:0;right:0;height:var(--fus-topbar);z-index:60;
  background:rgba(11,15,26,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--fus-line);}
.fus-header-inner{max-width:1180px;margin:0 auto;height:100%;display:flex;align-items:center;justify-content:space-between;padding:0 20px;}
.fus-brand{display:flex;align-items:center;gap:10px;color:var(--fus-text);font-weight:700;}
.fus-brand-mark{display:inline-flex;color:var(--fus-cyan);}
.fus-brand-text{font-size:15px;letter-spacing:.3px;}
.fus-nav{display:flex;align-items:center;gap:4px;}
.fus-nav-link,.fus-nav-cta{padding:8px 12px;border-radius:8px;color:var(--fus-muted);font-size:14px;white-space:nowrap;}
.fus-nav-link:hover{color:var(--fus-cyan);background:var(--fus-surface);}
.fus-nav-cta{background:linear-gradient(135deg,var(--fus-cyan),var(--fus-blue));color:#06121f;font-weight:700;}
.fus-nav-group{position:relative;display:none;}
.fus-nav-group>summary{list-style:none;cursor:pointer;padding:8px 12px;border-radius:8px;color:var(--fus-muted);font-size:14px;}
.fus-nav-group>summary::-webkit-details-marker{display:none;}
.fus-nav-sub{position:absolute;top:100%;left:0;background:var(--fus-surface);border:1px solid var(--fus-line);border-radius:10px;padding:8px;display:grid;grid-template-columns:1fr 1fr;gap:4px;min-width:240px;}
.fus-nav-sub a{display:block;padding:6px 10px;border-radius:6px;color:var(--fus-muted);font-size:13px;}
.fus-nav-sub a:hover{background:var(--fus-bg);color:var(--fus-cyan);}
.fus-nav-toggle{display:none;flex-direction:column;gap:4px;background:none;border:0;cursor:pointer;padding:8px;}
.fus-toggle-bar{width:22px;height:2px;background:var(--fus-text);border-radius:2px;}

/* ===== 容器 / 面包屑 ===== */
.fus-container{max-width:1180px;margin:0 auto;padding-left:var(--fus-h2-inset);padding-right:var(--fus-h2-inset);}
.fus-breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:13px;color:var(--fus-muted);padding:14px 0 10px;margin-bottom:6px;border-bottom:1px solid var(--fus-line);}
.fus-crumb-link{color:var(--fus-muted);}
.fus-crumb-link:hover{color:var(--fus-cyan);}
.fus-crumb-current{color:var(--fus-text);}
.fus-crumb-sep{color:var(--fus-line);}

/* ===== 详情 / 列表栅格 ===== */
.fus-layout-grid{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:36px;align-items:start;}
.fus-content-main{min-width:0;}
.fus-h1{font-size:30px;line-height:1.3;margin:6px 0 14px;letter-spacing:.3px;}
.fus-article-meta{display:flex;align-items:center;gap:12px;color:var(--fus-muted);font-size:13px;margin-bottom:18px;}
.fus-update{color:var(--fus-muted);}
.fus-prod-meta{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:14px;}
.fus-prod-chip{background:var(--fus-surface);border:1px solid var(--fus-line);color:var(--fus-muted);font-size:12px;padding:3px 10px;border-radius:999px;}
.fus-prod-chip-series{color:var(--fus-cyan);border-color:var(--fus-cyan);}
.fus-prod-chip-status{color:var(--fus-amber);border-color:var(--fus-amber);}

/* ===== TOC 悬浮目录 ===== */
.fus-toc-aside{position:sticky;top:calc(var(--fus-topbar) + 18px);max-height:calc(100vh - var(--fus-topbar) - 36px);overflow-y:auto;}
.fus-toc-panel{border:1px solid var(--fus-line);border-radius:12px;background:var(--fus-surface);padding:12px 12px 14px;}
.fus-toc-summary{cursor:pointer;font-weight:700;color:var(--fus-text);font-size:14px;list-style:none;padding:2px 2px 8px;}
.fus-toc-summary::-webkit-details-marker{display:none;}
.fus-toc-summary::after{content:"▾";float:right;color:var(--fus-muted);}
.fus-toc-panel[open] .fus-toc-summary::after{content:"▴";}
.fus-toc-link{display:block;color:var(--fus-muted);font-size:13px;padding:5px 8px;border-left:2px solid var(--fus-line);margin:2px 0;}
.fus-toc-link:hover{color:var(--fus-cyan);border-left-color:var(--fus-cyan);}
.fus-toc-l3{padding-left:20px;font-size:12px;}

/* ===== 列表页分类左列表 ===== */
.fus-list-layout .fus-layout-grid{grid-template-columns:240px minmax(0,1fr);}
.fus-cat-side{position:sticky;top:calc(var(--fus-topbar) + 18px);}
.fus-cat-panel{border:1px solid var(--fus-line);border-radius:12px;background:var(--fus-surface);padding:10px 12px 14px;}
.fus-cat-summary{cursor:pointer;font-weight:700;color:var(--fus-text);font-size:14px;list-style:none;padding:2px 2px 8px;}
.fus-cat-summary::-webkit-details-marker{display:none;}
.fus-cat-summary::after{content:"▾";float:right;color:var(--fus-muted);}
.fus-cat-panel[open] .fus-cat-summary::after{content:"▴";}
.fus-category-list{list-style:none;margin:0;padding:0;}
.fus-category-list li{margin:2px 0;}
.fus-cat-link{display:block;padding:7px 10px;border-radius:8px;color:var(--fus-muted);font-size:14px;}
.fus-cat-link:hover{background:var(--fus-bg);color:var(--fus-cyan);}
.fus-cat-active{background:var(--fus-bg);color:var(--fus-cyan);font-weight:700;}
.fus-cat-content{min-width:0;}
.fus-list-desc{color:var(--fus-muted);margin:0 0 18px;}
.fus-item-list{list-style:none;margin:0;padding:0;}
.fus-item{padding:16px 0;border-bottom:1px solid var(--fus-line);}
.fus-item-title{font-size:18px;font-weight:600;}
.fus-item-summary{color:var(--fus-muted);margin:6px 0 0;font-size:14px;}
.fus-pagination{display:flex;gap:8px;margin-top:22px;flex-wrap:wrap;}
.fus-page-current{background:var(--fus-cyan);color:#06121f;font-weight:700;padding:6px 12px;border-radius:8px;}
.fus-page-link{padding:6px 12px;border-radius:8px;border:1px solid var(--fus-line);color:var(--fus-muted);}
.fus-page-link:hover{color:var(--fus-cyan);border-color:var(--fus-cyan);}

/* ===== 页面卡片 ===== */
.fus-page-card{background:var(--fus-surface);border:1px solid var(--fus-line);border-radius:var(--fus-radius);padding:30px 34px;margin:18px 0 30px;}
.fus-page-lead{color:var(--fus-muted);}
.fus-404-card{text-align:center;}
.fus-404-code{font-size:64px;font-weight:800;color:var(--fus-cyan);margin:0;}
.fus-404-links{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:18px;}

/* ===== 正文排版 ===== */
.fus-content-main h2{font-size:22px;margin:30px 0 12px;padding-bottom:8px;border-bottom:1px solid var(--fus-line);color:#fff;}
.fus-content-main h3{font-size:18px;margin:22px 0 10px;color:var(--fus-cyan);}
.fus-content-main p{margin:12px 0;}
.fus-content-main ul,.fus-content-main ol{padding-left:22px;}
.fus-content-main li{margin:6px 0;}
.fus-content-main blockquote{border-left:3px solid var(--fus-cyan);background:var(--fus-surface);margin:16px 0;padding:12px 16px;color:var(--fus-muted);border-radius:0 8px 8px 0;}

/* ===== 表格（覆盖全部正文表格） ===== */
table.fus-spec,.fus-content-main table,.fus-page-card table{border-collapse:collapse;width:100%;margin:16px 0;font-size:14px;border:1px solid #2f4a6e;}
table.fus-spec th,.fus-content-main table th,.fus-page-card table th{background:linear-gradient(135deg,#16233c,#1c2f4d);color:#dff;font-weight:700;text-align:left;padding:10px 12px;border:1px solid #2f4a6e;}
table.fus-spec td,.fus-content-main table td,.fus-page-card table td{padding:9px 12px;border:1px solid #2f4a6e;color:var(--fus-text);}
table.fus-spec tbody tr:nth-child(even),.fus-content-main table tbody tr:nth-child(even),.fus-page-card table tbody tr:nth-child(even){background:rgba(35,230,201,.05);}

/* ===== FAQ ===== */
.fus-faq-block{margin:26px 0 10px;border-top:1px solid var(--fus-line);padding-top:14px;}
.fus-faq-block h2{font-size:22px;margin:0 0 12px;color:#fff;}
.fus-faq-block details{border:1px solid var(--fus-line);border-radius:10px;background:var(--fus-surface);margin:8px 0;padding:0 14px;}
.fus-faq-block summary{cursor:pointer;font-weight:600;padding:12px 0;list-style:none;color:var(--fus-text);}
.fus-faq-block summary::-webkit-details-marker{display:none;}
.fus-faq-block summary::before{content:"＋";color:var(--fus-cyan);margin-right:8px;font-weight:700;}
.fus-faq-block details[open] summary::before{content:"－";}
.fus-faq-block details p{padding:0 0 12px;color:var(--fus-muted);margin:0;}

/* ===== 首页 Hero ===== */
.fus-hero{position:relative;overflow:hidden;background:radial-gradient(1200px 500px at 70% -10%,rgba(35,230,201,.12),transparent),linear-gradient(180deg,#0b0f1a,#0f1626);padding:54px 0 30px;}
.fus-hero-grid{position:absolute;inset:0;background-image:linear-gradient(rgba(35,230,201,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(91,157,255,.05) 1px,transparent 1px);background-size:40px 40px;opacity:.6;}
.fus-hero .fus-container{position:relative;}
.fus-eyebrow{color:var(--fus-cyan);font-size:13px;letter-spacing:2px;margin:0 0 10px;text-transform:uppercase;}
.fus-hero-title{font-size:40px;line-height:1.2;margin:0 0 14px;font-weight:800;}
.fus-hero-sub{color:var(--fus-muted);font-size:17px;max-width:760px;}
.fus-hero-cta{display:flex;gap:14px;margin:24px 0 10px;flex-wrap:wrap;}
.fus-btn{display:inline-block;padding:11px 22px;border-radius:10px;font-weight:700;font-size:15px;}
.fus-btn-primary{background:linear-gradient(135deg,var(--fus-cyan),var(--fus-blue));color:#06121f;}
.fus-btn-ghost{border:1px solid var(--fus-line);color:var(--fus-text);}
.fus-btn-ghost:hover{border-color:var(--fus-cyan);color:var(--fus-cyan);}
.fus-fusion-wrap{margin:26px 0 6px;}
.fus-fusion{width:100%;max-width:560px;display:block;margin:0 auto;}
.fus-hero-facts{display:flex;gap:26px;list-style:none;padding:0;margin:14px 0 0;flex-wrap:wrap;}
.fus-hero-facts li{display:flex;flex-direction:column;}
.fus-hero-facts strong{font-size:20px;color:var(--fus-cyan);}
.fus-hero-facts span{color:var(--fus-muted);font-size:13px;}

/* ===== 首页区块 ===== */
.fus-section{padding:46px 0;}
.fus-section-alt{background:linear-gradient(180deg,#0f1626,#0c1320);}
.fus-section-title{font-size:26px;margin:0 0 8px;}
.fus-section-lead{color:var(--fus-muted);max-width:820px;margin:0 0 22px;}
.fus-prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.fus-prod-card{background:var(--fus-surface);border:1px solid var(--fus-line);border-radius:var(--fus-radius);padding:20px;display:flex;flex-direction:column;gap:8px;transition:.2s;}
.fus-prod-card:hover{border-color:var(--fus-cyan);transform:translateY(-3px);}
.fus-prod-num{color:var(--fus-cyan);font-weight:800;font-size:14px;}
.fus-prod-name{font-size:19px;font-weight:700;}
.fus-prod-desc{color:var(--fus-muted);font-size:14px;flex:1;}
.fus-prod-go{color:var(--fus-blue);font-size:14px;}
.fus-chip-row{display:flex;gap:10px;flex-wrap:wrap;list-style:none;padding:0;margin:0;}
.fus-chip{background:var(--fus-surface);border:1px solid var(--fus-line);color:var(--fus-text);padding:8px 14px;border-radius:999px;font-size:14px;}
.fus-scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.fus-scene-card{background:var(--fus-surface);border:1px solid var(--fus-line);border-radius:var(--fus-radius);padding:20px;}
.fus-scene-card h3{margin:0 0 8px;color:var(--fus-cyan);font-size:18px;}
.fus-scene-card p{color:var(--fus-muted);font-size:14px;margin:0 0 12px;}
.fus-feature-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.fus-feature-item{background:var(--fus-surface);border:1px solid var(--fus-line);border-radius:12px;padding:16px 18px;}
.fus-feature-title{font-size:17px;font-weight:600;}
.fus-feature-summary{color:var(--fus-muted);font-size:14px;margin:6px 0 0;}
.fus-section-more{margin-top:18px;}
.fus-cta{background:linear-gradient(135deg,#0f1626,#13203a);padding:40px 0;}
.fus-cta-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;}
.fus-cta-title{font-size:24px;margin:0 0 6px;}
.fus-cta-desc{color:var(--fus-muted);margin:0;max-width:640px;}

/* ===== 归档 ===== */
.fus-archive-group{margin:18px 0;}
.fus-archive-title{font-size:22px;margin:0 0 8px;}
.fus-archive-sub{font-size:16px;color:var(--fus-cyan);margin:14px 0 6px;}
.fus-archive-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(2,1fr);gap:6px 22px;}
.fus-archive-list a{color:var(--fus-muted);font-size:14px;}
.fus-archive-list a:hover{color:var(--fus-cyan);}

/* ===== 悬浮工具胶囊 ===== */
.fus-capsule{position:fixed;right:14px;top:50%;transform:translateY(-50%);z-index:70;display:flex;flex-direction:column;gap:10px;}
.fus-cap-btn{width:54px;height:54px;border-radius:16px;border:0;cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  background:linear-gradient(135deg,var(--fus-cyan),var(--fus-blue));color:#06121f;box-shadow:0 6px 20px rgba(35,230,201,.28);font-weight:700;}
.fus-cap-btn:hover{filter:brightness(1.08);}
.fus-cap-icon{width:22px;height:22px;}
.fus-cap-text{font-size:11px;}
.fus-card-modal{position:fixed;inset:0;z-index:90;background:rgba(3,7,14,.72);display:flex;align-items:center;justify-content:center;}
.fus-card-modal[hidden]{display:none;}
.fus-card-modal-box{position:relative;max-width:92vw;max-height:88vh;display:flex;}
.fus-card-img{max-width:92vw;max-height:88vh;width:auto;height:auto;object-fit:contain;border-radius:10px;box-shadow:0 10px 40px rgba(0,0,0,.5);}
.fus-card-close{position:absolute;top:18px;right:22px;background:none;border:0;color:#fff;font-size:34px;cursor:pointer;}
.fus-mail-pop{position:fixed;right:78px;top:50%;transform:translateY(-50%);z-index:80;background:var(--fus-surface);border:1px solid var(--fus-cyan);border-radius:10px;padding:12px 14px;color:var(--fus-text);font-size:14px;box-shadow:0 6px 20px rgba(0,0,0,.4);}
.fus-mail-pop a{color:var(--fus-cyan);font-weight:700;}

/* ===== 页脚 ===== */
.fus-footer{border-top:1px solid var(--fus-line);background:#0a0e18;padding:36px 0 18px;margin-top:30px;}
.fus-footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:24px;}
.fus-footer-brand{font-weight:700;display:flex;align-items:center;gap:8px;margin-bottom:10px;}
.fus-footer-brand .fus-brand-mark{color:var(--fus-cyan);}
.fus-footer-desc{color:var(--fus-muted);font-size:13px;max-width:360px;}
.fus-footer-title{color:var(--fus-text);font-weight:700;font-size:14px;margin-bottom:8px;}
.fus-footer-link{display:block;color:var(--fus-muted);font-size:13px;padding:3px 0;}
.fus-footer-link:hover{color:var(--fus-cyan);}
.fus-footer-note{color:var(--fus-muted);font-size:12px;margin:8px 0 0;}
.fus-footer-bottom{color:var(--fus-muted);font-size:12px;text-align:center;margin-top:24px;border-top:1px solid var(--fus-line);padding-top:14px;}

/* ===== 响应式折叠（V7.0）：≤1024px ===== */
@media (max-width:1024px){
  .fus-nav{position:fixed;top:var(--fus-topbar);right:0;width:260px;height:calc(100vh - var(--fus-topbar));background:var(--fus-bg);border-left:1px solid var(--fus-line);
    flex-direction:column;align-items:stretch;gap:2px;padding:14px;transform:translateX(100%);transition:transform .25s ease;}
  .fus-nav.fus-nav-open{transform:translateX(0);}
  .fus-nav-link,.fus-nav-cta{display:block;}
  .fus-nav-group{display:block;}
  .fus-nav-sub{position:static;grid-template-columns:1fr 1fr;min-width:0;background:none;border:0;padding:4px 0 8px 8px;}
  .fus-nav-toggle{display:flex;}
  .fus-layout-grid{grid-template-columns:1fr !important;}
  .fus-toc-aside{position:static;max-height:none;margin-top:18px;}
  .fus-cat-side{position:static;margin-bottom:18px;}
  .fus-prod-grid,.fus-scene-grid{grid-template-columns:1fr 1fr;}
  .fus-feature-list,.fus-archive-list{grid-template-columns:1fr;}
  .fus-hero-title{font-size:30px;}
  .fus-capsule{right:8px;}
  .fus-cap-btn{width:48px;height:48px;}
}
@media (max-width:640px){
  .fus-prod-grid,.fus-scene-grid{grid-template-columns:1fr;}
  .fus-footer-grid{grid-template-columns:1fr 1fr;}
  .fus-page-card{padding:20px 18px;}
  .fus-h1{font-size:24px;}
}