:root{
  --bg:#0B1020;
  --surface:#131A2E;
  --surface-2:#1A2440;
  --border:#2A3556;
  --text:#E6ECF7;
  --text-dim:#9AA8C7;
  --violet:#7C3AED;
  --cyan:#22D3EE;
  --violet-soft:rgba(124,58,237,.15);
  --cyan-soft:rgba(34,211,238,.12);
  --grad:linear-gradient(135deg,#7C3AED,#22D3EE);
  --h2-inset:24px;
  --h2-inset-page:48px;
  --maxw:1120px;
  --radius:14px;
  --shadow:0 10px 30px rgba(0,0,0,.35);
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;background:var(--bg);color:var(--text);
  font-family:"Segoe UI","PingFang SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
a{color:var(--cyan);text-decoration:none;}
a:hover{color:#7fe7f5;}
img{max-width:100%;}
h1,h2,h3,h4{line-height:1.3;font-weight:700;}
.container,.atn-container{max-width:var(--maxw);margin:0 auto;padding:0 16px;}

/* ===== Header / Nav ===== */
.atn-header{position:sticky;top:0;z-index:50;background:rgba(11,16,32,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);}
.atn-header-inner{max-width:var(--maxw);margin:0 auto;padding:0 16px;display:flex;align-items:center;height:62px;gap:18px;}
.atn-logo{font-weight:800;font-size:18px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;white-space:nowrap;}
.atn-nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px;margin-left:auto;}
.atn-nav-toggle span{display:block;width:24px;height:2px;background:var(--text);border-radius:2px;}
.atn-nav{margin-left:auto;}
.atn-nav-list{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0;}
.atn-nav-item{position:relative;}
.atn-nav-item>a{display:block;padding:20px 14px;color:var(--text);font-size:15px;font-weight:600;transition:color .2s;}
.atn-nav-item>a:hover{color:var(--cyan);}
.atn-nav-sub{position:absolute;top:100%;left:0;min-width:200px;background:var(--surface);border:1px solid var(--border);border-radius:10px;box-shadow:var(--shadow);padding:8px;display:none;flex-direction:column;}
.atn-nav-item:hover .atn-nav-sub{display:flex;}
.atn-nav-sub a{padding:8px 10px;border-radius:8px;color:var(--text-dim);font-size:14px;}
.atn-nav-sub a:hover{background:var(--violet-soft);color:var(--text);}

/* ===== Breadcrumb ===== */
.atn-crumb{padding:14px 0 0 var(--h2-inset);max-width:var(--maxw);margin:0 auto;}
.atn-crumb-list{list-style:none;display:flex;flex-wrap:wrap;align-items:center;gap:6px;margin:0;padding:0;font-size:13px;color:var(--text-dim);}
.atn-crumb-item a{color:var(--text-dim);}
.atn-crumb-item a:hover{color:var(--cyan);}
.atn-crumb-sep{margin:0 2px;color:var(--border);}
.atn-crumb-current{color:var(--text);}

/* ===== Layouts ===== */
.atn-main{min-height:60vh;}
.atn-article-wrap,.atn-list-wrap,.atn-page-wrap{max-width:var(--maxw);margin:0 auto;padding:0 16px 64px;}
.atn-layout-grid{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:36px;align-items:start;margin-top:18px;}
.atn-layout-grid.atn-list-layout{grid-template-columns:240px minmax(0,1fr);}
.atn-content-main{padding-left:var(--h2-inset);min-width:0;}
.atn-page-main{padding-left:var(--h2-inset-page);}
.atn-body.page{--h2-inset:var(--h2-inset-page);}
.atn-body.home .atn-crumb{display:none;}

.atn-h1{font-size:30px;margin:6px 0 18px;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;}

/* ===== TOC ===== */
.atn-toc-aside{position:sticky;top:84px;max-height:calc(100vh - 104px);overflow:auto;}
.atn-toc-list{list-style:none;margin:0;padding:0;}
.atn-toc-list li{margin:2px 0;}
.atn-toc-list a{display:block;padding:6px 10px;color:var(--text-dim);font-size:13px;border-left:2px solid transparent;border-radius:0 6px 6px 0;}
.atn-toc-list a:hover{border-left-color:var(--cyan);color:var(--text);background:var(--violet-soft);}

/* ===== Category side ===== */
.atn-cat-side{padding-top:8px;}
.atn-cat-content{padding-left:var(--h2-inset);}
.category-list{list-style:none;margin:0;padding:0;}
.category-list li{margin:2px 0;}
.category-list li a{display:block;padding:9px 12px;border-radius:8px;color:var(--text-dim);border-left:2px solid transparent;}
.category-list li a:hover{background:var(--violet-soft);color:var(--text);}
.category-list li.active a{background:var(--violet-soft);color:var(--text);border-left-color:var(--cyan);font-weight:600;}

/* ===== Details panels (cat / toc) ===== */
.atn-cat-panel,.atn-toc-panel{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:10px 12px;margin-bottom:14px;}
.atn-cat-panel>summary,.atn-toc-panel>summary{cursor:pointer;font-weight:700;color:var(--text);list-style:none;padding:4px 2px;display:flex;align-items:center;justify-content:space-between;}
.atn-cat-panel>summary::-webkit-details-marker{display:none;}
.atn-cat-panel>summary::after,.atn-toc-panel>summary::after{content:"▾";color:var(--cyan);transition:transform .2s;margin-left:8px;}
.atn-cat-panel[open]>summary::after,.atn-toc-panel[open]>summary::after{transform:rotate(180deg);}

/* ===== Prose ===== */
.atn-content-main h2{font-size:23px;margin:34px 0 12px;padding-bottom:8px;border-bottom:1px solid var(--border);color:var(--text);scroll-margin-top:90px;}
.atn-content-main h3{font-size:18px;margin:24px 0 10px;color:var(--cyan);scroll-margin-top:90px;}
.atn-content-main p{margin:12px 0;color:#d4dcea;}
.atn-content-main ul,.atn-content-main ol{padding-left:22px;margin:12px 0;}
.atn-content-main li{margin:6px 0;color:#d4dcea;}
.atn-content-main blockquote{margin:16px 0;padding:12px 16px;background:var(--violet-soft);border-left:3px solid var(--violet);border-radius:0 10px 10px 0;color:#cdd6ea;}
.atn-content-main strong{color:#fff;}
.atn-content-main code{background:var(--surface-2);padding:1px 6px;border-radius:5px;font-size:14px;color:var(--cyan);}
.atn-content-main .atn-summary{background:var(--surface);border:1px solid var(--border);border-left:3px solid var(--cyan);border-radius:10px;padding:14px 18px;margin:16px 0;color:#dde4f2;}
.atn-keyline{color:var(--text-dim);font-size:14px;margin:6px 0 18px;}

/* ===== Tables ===== */
.atn-content-main table,table.atn-spec{border-collapse:collapse;width:100%;margin:16px 0;font-size:14px;border:1px solid #cbd5e1;background:var(--surface);}
.atn-content-main table th,.atn-content-main table td,table.atn-spec th,table.atn-spec td{border:1px solid #cbd5e1;padding:9px 12px;text-align:left;color:var(--text);}
.atn-content-main table th,table.atn-spec th{background:var(--violet);color:#fff;font-weight:600;}
.atn-content-main table tr:nth-child(even) td,table.atn-spec tr:nth-child(even) td{background:var(--surface-2);}

/* ===== FAQ / bare details ===== */
.atn-content-main details{border:1px solid var(--border);border-radius:10px;margin:10px 0;background:var(--surface);overflow:hidden;}
.atn-content-main details[open]{border-color:var(--violet);}
.atn-content-main details>summary{cursor:pointer;padding:13px 16px;font-weight:600;color:var(--text);list-style:none;display:flex;align-items:center;justify-content:space-between;}
.atn-content-main details>summary::-webkit-details-marker{display:none;}
.atn-content-main details>summary::after{content:"+";color:var(--cyan);font-size:18px;}
.atn-content-main details[open]>summary::after{content:"−";}
.atn-content-main details>div{padding:0 16px 14px;color:#d4dcea;}
.atn-content-main details .atn-faq-a{padding:0 16px 14px;}

/* ===== Case study ===== */
.atn-case{margin:18px 0;padding:14px 18px;background:var(--cyan-soft);border:1px solid var(--cyan);border-radius:12px;}
.atn-case-title{font-weight:700;color:var(--cyan);margin-bottom:6px;}
.atn-case p{margin:0;color:#d4dcea;}

/* ===== Related ===== */
.atn-related{margin:26px 0 8px;padding-top:14px;border-top:1px solid var(--border);}
.atn-related-title{font-weight:700;margin-bottom:8px;}
.atn-related a{display:block;padding:8px 0;color:var(--text-dim);border-bottom:1px dashed var(--border);}
.atn-related a:hover{color:var(--cyan);}

/* ===== Cards (list) ===== */
.atn-card-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;margin-top:18px;}
.atn-card{display:block;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;transition:transform .2s,border-color .2s,box-shadow .2s;}
.atn-card:hover{transform:translateY(-3px);border-color:var(--violet);box-shadow:var(--shadow);}
.atn-card-title{font-weight:700;font-size:17px;margin-bottom:6px;color:var(--text);}
.atn-card-desc{font-size:14px;color:var(--text-dim);line-height:1.6;}

/* ===== Hero ===== */
.atn-hero{position:relative;overflow:hidden;background:radial-gradient(1200px 500px at 70% -10%,rgba(124,58,237,.25),transparent),radial-gradient(900px 500px at 10% 10%,rgba(34,211,238,.18),transparent),var(--bg);border-bottom:1px solid var(--border);}
.atn-hero-inner{max-width:var(--maxw);margin:0 auto;padding:78px 16px 64px;position:relative;}
.atn-hero-kicker{color:var(--cyan);font-weight:700;letter-spacing:1px;margin:0 0 12px;font-size:14px;}
.atn-hero-title{font-size:40px;line-height:1.25;margin:0 0 18px;max-width:880px;}
.atn-hero-sub{font-size:17px;color:var(--text-dim);max-width:760px;margin:0 0 26px;}
.atn-hero-cta{display:flex;gap:14px;flex-wrap:wrap;}
.atn-hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:46px;}
.atn-stat{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;display:flex;flex-direction:column;gap:4px;}
.atn-stat-num{font-size:26px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;}
.atn-stat-label{font-size:13px;color:var(--text-dim);}

/* ===== Buttons ===== */
.atn-btn{display:inline-block;padding:12px 22px;border-radius:10px;font-weight:700;font-size:15px;transition:transform .15s,box-shadow .2s;}
.atn-btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 22px rgba(124,58,237,.35);}
.atn-btn-primary:hover{transform:translateY(-2px);color:#fff;}
.atn-btn-ghost{border:1px solid var(--border);color:var(--text);}
.atn-btn-ghost:hover{border-color:var(--cyan);color:var(--cyan);}

/* ===== Sections ===== */
.atn-section{padding:54px 0;}
.atn-section-alt{background:var(--surface);border-top:1px solid var(--border);border-bottom:1px solid var(--border);}
.atn-sec-title{font-size:26px;margin:0 0 10px;}
.atn-sec-title-2{margin-top:40px;}
.atn-sec-sub{color:var(--text-dim);margin:0 0 22px;max-width:760px;}

/* ===== Product grid ===== */
.atn-prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.atn-prod-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;transition:transform .2s,border-color .2s;}
.atn-prod-card:hover{transform:translateY(-4px);border-color:var(--violet);}
.atn-prod-card-title{font-size:18px;font-weight:700;margin-bottom:8px;color:var(--text);}
.atn-prod-card-desc{font-size:14px;color:var(--text-dim);margin-bottom:14px;min-height:62px;}
.atn-prod-card-arrow{color:var(--cyan);font-size:14px;font-weight:600;}

/* ===== Keyword cloud ===== */
.atn-keyword-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px;}
.atn-keyword{background:var(--violet-soft);border:1px solid var(--border);color:var(--text);padding:7px 14px;border-radius:999px;font-size:14px;}

/* ===== Steps ===== */
.atn-step-row{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;}
.atn-step{background:var(--surface-2);border:1px solid var(--border);border-radius:var(--radius);padding:18px;}
.atn-step-no{width:34px;height:34px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;margin-bottom:10px;}
.atn-step-title{font-weight:700;margin-bottom:6px;}
.atn-step-desc{font-size:13px;color:var(--text-dim);line-height:1.6;}

/* ===== Scenarios ===== */
.atn-scenario-row{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.atn-scenario{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;}
.atn-scenario-title{font-weight:700;margin-bottom:8px;color:var(--cyan);}
.atn-scenario-desc{font-size:14px;color:var(--text-dim);line-height:1.6;}

/* ===== Views ===== */
.atn-view-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;}
.atn-view-card{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:16px;color:var(--text);transition:border-color .2s,transform .2s;}
.atn-view-card:hover{border-color:var(--cyan);transform:translateY(-3px);}

/* ===== CTA band ===== */
.atn-cta-band{background:radial-gradient(700px 300px at 80% 0,rgba(124,58,237,.22),transparent),var(--surface);border-top:1px solid var(--border);}
.atn-cta-inner{max-width:var(--maxw);margin:0 auto;padding:42px 16px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;}
.atn-cta-title{font-size:24px;margin:0 0 8px;}
.atn-cta-sub{color:var(--text-dim);margin:0;max-width:640px;}

/* ===== Archive ===== */
.atn-archive-intro{color:var(--text-dim);margin:0 0 22px;}
.atn-archive-h2{font-size:22px;margin:28px 0 12px;}
.atn-archive-group{margin-bottom:14px;}
.atn-archive-group-name{font-weight:700;margin-bottom:6px;}
.atn-archive-group-name a{color:var(--cyan);}
.atn-archive-list{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:8px 18px;}
.atn-archive-list li a{color:var(--text-dim);font-size:14px;}
.atn-archive-list li a:hover{color:var(--cyan);}

/* ===== Footer ===== */
.atn-footer{background:var(--surface);border-top:1px solid var(--border);margin-top:30px;}
.atn-footer-inner{max-width:var(--maxw);margin:0 auto;padding:40px 16px 20px;display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:24px;}
.atn-foot-title{font-weight:700;margin-bottom:12px;color:var(--text);}
.atn-foot-desc{color:var(--text-dim);font-size:14px;line-height:1.7;}
.atn-foot-links{list-style:none;margin:0;padding:0;}
.atn-foot-links li{margin:6px 0;}
.atn-foot-links a{color:var(--text-dim);font-size:14px;}
.atn-foot-links a:hover{color:var(--cyan);}
.atn-footer-bottom{max-width:var(--maxw);margin:0 auto;padding:14px 16px 28px;color:var(--text-dim);font-size:13px;border-top:1px solid var(--border);}

/* ===== Float capsule ===== */
.atn-float{position:fixed;right:18px;top:50%;transform:translateY(-50%);z-index:60;display:flex;flex-direction:column;gap:10px;}
.atn-float-btn{display:flex;align-items:center;gap:8px;background:var(--grad);color:#fff;border:0;border-radius:999px;padding:9px 14px;font-size:13px;font-weight:600;box-shadow:0 8px 20px rgba(124,58,237,.4);cursor:pointer;transition:transform .15s;}
.atn-float-btn:hover{transform:scale(1.05);color:#fff;}
.atn-float-ico{font-size:16px;}
.atn-card-mask{position:fixed;inset:0;background:rgba(5,8,18,.78);z-index:80;display:flex;align-items:center;justify-content:center;padding:20px;}
.atn-card-mask[hidden]{display:none;}
.atn-card-pop{position:relative;background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:12px;max-width:min(360px,92vw);max-height:92vh;overflow:auto;}
.atn-card-img{display:block;max-width:100%;max-height:76vh;width:auto;height:auto;margin:0 auto;}
.atn-card-close{position:absolute;top:6px;right:10px;background:none;border:0;color:var(--text);font-size:26px;cursor:pointer;line-height:1;}

/* ===== 404 ===== */
.atn-notfound{text-align:center;padding:90px 16px;}
.atn-notfound-code{font-size:84px;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;}
.atn-notfound-sub{color:var(--text-dim);margin:0 0 24px;}

/* ===== Responsive ===== */
@media (max-width:1024px){
  .atn-nav-toggle{display:flex;}
  .atn-nav{position:absolute;top:62px;left:0;right:0;background:var(--surface);border-bottom:1px solid var(--border);display:none;flex-direction:column;padding:8px 0;}
  .atn-nav.open{display:flex;}
  .atn-nav-list{flex-direction:column;gap:0;width:100%;}
  .atn-nav-item>a{padding:13px 18px;}
  .atn-nav-sub{position:static;min-width:0;box-shadow:none;background:var(--surface-2);border-radius:0;border-left:0;border-right:0;}
  .atn-nav-item:hover .atn-nav-sub{display:none;}
  .atn-nav-item.open .atn-nav-sub{display:flex;}
  .atn-layout-grid,.atn-layout-grid.atn-list-layout{grid-template-columns:1fr;gap:20px;}
  .atn-layout-grid.atn-list-layout{grid-template-columns:1fr;}
  .atn-toc-aside{position:static;max-height:none;}
  .atn-prod-grid{grid-template-columns:repeat(2,1fr);}
  .atn-step-row{grid-template-columns:repeat(2,1fr);}
  .atn-scenario-row{grid-template-columns:repeat(2,1fr);}
  .atn-view-grid{grid-template-columns:repeat(2,1fr);}
  .atn-hero-stats{grid-template-columns:repeat(2,1fr);}
  .atn-footer-inner{grid-template-columns:1fr 1fr;}
}
@media (max-width:600px){
  .atn-hero-title{font-size:30px;}
  .atn-prod-grid,.atn-step-row,.atn-scenario-row,.atn-view-grid,.atn-hero-stats{grid-template-columns:1fr;}
  .atn-footer-inner{grid-template-columns:1fr;}
  .atn-float{right:10px;}
  .atn-content-main,.atn-cat-content,.atn-page-main{padding-left:16px;}
  .atn-crumb{padding-left:16px;}
}