:root{
  --bg:#FBFAFD;
  --paper:#FFFFFF;
  --ink:#17141F;
  --ink-2:#413C4D;
  --muted:#736E80;
  --line:#E9E6EF;
  --line-2:#D8D3E3;
  --accent:#5B21B6;
  --accent-2:#7C3AED;
  --accent-soft:#F3EEFC;
  --amber-soft:#FFF7E8;
  --amber:#946410;
  --radius:12px;
  --max:1180px;
  --ease:cubic-bezier(.4,0,.2,1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
img{max-width:100%;display:block}
::selection{background:#DCD0F7;color:var(--ink)}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:4px}

.shell{max-width:var(--max);margin:0 auto;padding:0 32px}

.skip-link{position:absolute;left:-9999px;top:0;background:#fff;padding:10px 18px;z-index:200;border-radius:0 0 8px 0}
.skip-link:focus{left:0}

/* ============ 顶栏 ============ */
.topbar{
  position:sticky;top:0;z-index:80;
  background:rgba(251,250,253,.88);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
}
.topbar-in{
  max-width:var(--max);margin:0 auto;padding:0 32px;
  height:64px;display:flex;align-items:center;justify-content:space-between;gap:28px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:750;font-size:16px;letter-spacing:-.015em}
.brand-img{width:32px;height:32px;border-radius:8px;flex:none;display:block}
.brand small{
  font-size:10.5px;font-weight:600;color:var(--muted);
  letter-spacing:.06em;padding-left:10px;margin-left:2px;
  border-left:1px solid var(--line-2);text-transform:uppercase;
}
.topnav{display:flex;gap:26px;font-size:13.8px;color:var(--muted)}
.topnav a{position:relative;padding:4px 0;transition:color .18s var(--ease)}
.topnav a:hover{color:var(--ink)}
.topnav a::after{
  content:"";position:absolute;left:0;bottom:0;height:1.5px;width:0;
  background:var(--accent);transition:width .22s var(--ease);
}
.topnav a:hover::after{width:100%}
.topbar-actions{display:flex;align-items:center;gap:10px}
.btn{display:inline-flex;align-items:center;gap:7px;font-weight:600;font-size:13.5px;border-radius:8px;transition:.18s var(--ease);white-space:nowrap}
.btn-line{padding:8px 15px;border:1px solid var(--line-2);color:var(--ink-2);background:transparent}
.btn-line:hover{border-color:var(--ink-2);color:var(--ink);background:#fff}
.btn-solid{padding:9px 18px;background:var(--accent);color:#fff}
.btn-solid:hover{background:var(--accent-2);transform:translateY(-1px)}
.btn-lg{padding:12px 24px;font-size:14.5px;border-radius:9px}

/* ============ Hero ============ */
.hero{padding:60px 0 70px;position:relative;overflow:hidden}
.hero::before{
  content:"";position:absolute;top:-180px;right:-120px;width:620px;height:620px;
  background:radial-gradient(circle,rgba(91,33,182,.07),transparent 66%);
  pointer-events:none;
}
.hero-grid{
  display:grid;grid-template-columns:1.02fr .98fr;gap:72px;align-items:center;
  position:relative;z-index:1;
}
.kicker{
  display:inline-flex;align-items:center;gap:9px;
  font-size:11.5px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;
  color:var(--accent);margin-bottom:24px;
}
.kicker::before{content:"";width:18px;height:2px;background:var(--accent);display:block}
.hero h1{
  font-size:clamp(36px,4.5vw,58px);line-height:1.1;letter-spacing:-.038em;
  font-weight:800;margin-bottom:24px;color:var(--ink);
}
.hero h1 .hl{
  color:var(--accent);
  background:linear-gradient(transparent 66%,#DCD0F7 66%);
  padding:0 2px;
}
.lede{
  font-size:16.5px;line-height:1.85;color:var(--ink-2);
  max-width:520px;margin-bottom:34px;
}
.lede strong{color:var(--ink);font-weight:650}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:46px}

.metrics{
  display:flex;flex-wrap:wrap;gap:40px;
  padding-top:26px;border-top:1px solid var(--line);
}
.metrics div{min-width:0}
.metrics dt{font-size:21px;font-weight:750;letter-spacing:-.025em;color:var(--ink);line-height:1.3}
.metrics dd{font-size:12.5px;color:var(--muted);margin-top:2px;letter-spacing:.01em}

/* 工作台示意 */
.mock{
  background:var(--paper);border:1px solid var(--line);border-radius:16px;
  box-shadow:0 32px 70px -34px rgba(23,20,31,.28), 0 2px 6px rgba(23,20,31,.04);
  overflow:hidden;
}
.mock-bar{
  display:flex;align-items:center;gap:6px;
  padding:12px 16px;border-bottom:1px solid var(--line);background:#FCFBFE;
}
.dot{width:8px;height:8px;border-radius:50%;background:#E6E2EE}
.mock-title{margin-left:8px;font-size:11.5px;color:var(--muted);font-weight:600;letter-spacing:.02em}
.mock-body{padding:18px 16px 20px;display:flex;flex-direction:column;gap:14px}
.mock-task{
  background:var(--bg);border:1px solid var(--line);border-radius:9px;padding:12px 14px;
}
.mock-label{
  display:block;font-size:9.5px;font-weight:800;letter-spacing:.14em;
  color:var(--muted);text-transform:uppercase;margin-bottom:5px;
}
.mock-task p{font-size:13px;line-height:1.6;color:var(--ink);font-weight:500}
.mock-agents{display:flex;flex-wrap:wrap;gap:7px}
.chip{
  font-size:11px;font-weight:600;padding:5px 11px;border-radius:100px;
  background:#F5F3FA;color:var(--muted);border:1px solid var(--line);
  white-space:nowrap;
}
.chip-done{background:var(--accent-soft);color:var(--accent);border-color:#DCCFF7}
.chip-run{background:var(--amber-soft);color:var(--amber);border-color:#F1E2C0}
.progress{height:4px;border-radius:99px;background:var(--line);overflow:hidden}
.progress span{display:block;height:100%;width:68%;background:var(--accent);border-radius:99px}
.mock-out{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.out-card{
  border:1px solid var(--line);border-radius:9px;padding:11px 8px;text-align:center;
  background:var(--paper);
}
.out-card b{display:block;font-size:11.5px;font-weight:700;color:var(--ink);letter-spacing:.02em}
.out-card small{font-size:10px;color:var(--muted);display:block;margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* ============ 文档区 ============ */
.doc{border-top:1px solid var(--line);padding:60px 0 20px}
.doc-grid{display:grid;grid-template-columns:198px minmax(0,1fr);gap:72px;align-items:start}

.toc{position:sticky;top:92px}
.toc-title{
  font-size:10.5px;font-weight:800;letter-spacing:.16em;text-transform:uppercase;
  color:var(--muted);margin-bottom:14px;
}
.toc ol{display:flex;flex-direction:column;gap:1px}
.toc a{
  display:block;padding:6px 0 6px 13px;font-size:13.2px;color:var(--muted);
  border-left:2px solid var(--line);line-height:1.45;
  transition:.18s var(--ease);
}
.toc a:hover{color:var(--ink);border-left-color:var(--line-2);padding-left:16px}
.toc a.active{color:var(--accent);border-left-color:var(--accent);font-weight:600}

.sec{padding-bottom:76px;scroll-margin-top:92px}
.sec-head{
  display:flex;align-items:baseline;gap:14px;
  padding-bottom:20px;margin-bottom:32px;border-bottom:1px solid var(--line-2);
}
.sec-num{
  font-size:11.5px;font-weight:800;letter-spacing:.12em;color:var(--accent);
  flex:none;
}
.sec-head h2{
  font-size:clamp(21px,2.3vw,28px);font-weight:750;letter-spacing:-.025em;
  line-height:1.28;color:var(--ink);
}
.sec-lede{
  font-size:15.5px;line-height:1.85;color:var(--ink-2);
  max-width:680px;margin-bottom:38px;
}

/* 01 介绍 */
.intro-cols{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);gap:60px}
.intro-text p{font-size:15.2px;line-height:1.9;color:var(--ink-2);margin-bottom:18px}
.intro-text p strong{color:var(--ink);font-weight:650}
.pull{
  margin-top:26px;padding:6px 0 6px 20px;border-left:3px solid var(--accent);
  font-size:15px;font-weight:600;color:var(--ink);line-height:1.75;
}
.facts{display:flex;flex-direction:column}
.facts li{padding:15px 0;border-top:1px solid var(--line)}
.facts li:first-child{border-top:none;padding-top:0}
.facts .k{
  display:block;font-size:10.5px;font-weight:800;letter-spacing:.13em;
  text-transform:uppercase;color:var(--muted);margin-bottom:4px;
}
.facts .v{font-size:14.2px;font-weight:600;color:var(--ink);line-height:1.55}

/* 02 功能 */
.feat-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 52px}
.feat{padding:22px 0;border-top:1px solid var(--line)}
.feat h3{
  font-size:15.5px;font-weight:700;letter-spacing:-.01em;margin-bottom:7px;
  display:flex;align-items:baseline;gap:10px;color:var(--ink);
}
.feat h3 .n{
  font-size:10.5px;font-weight:800;color:var(--accent);letter-spacing:.08em;flex:none;
}
.feat p{font-size:13.8px;line-height:1.8;color:var(--ink-2);margin-bottom:9px}
.tag{
  display:inline-block;font-size:11px;font-weight:600;color:var(--accent);
  background:var(--accent-soft);padding:2.5px 9px;border-radius:5px;letter-spacing:.01em;
}

/* 03 理由 */
.reasons{display:flex;flex-direction:column}
.reason{
  display:grid;grid-template-columns:1fr 1fr;gap:44px;
  padding:21px 0;border-top:1px solid var(--line);align-items:start;
}
.reason-pain{
  font-size:14.3px;line-height:1.75;color:var(--muted);
  padding-left:22px;position:relative;
}
.reason-pain::before{
  content:"";position:absolute;left:0;top:.72em;
  width:11px;height:1.5px;background:var(--line-2);
}
.reason-gain{
  font-size:14.3px;line-height:1.75;color:var(--ink);font-weight:550;
  padding-left:24px;position:relative;
}
.reason-gain::before{
  content:"→";position:absolute;left:0;top:0;
  color:var(--accent);font-weight:700;font-size:14px;
}

/* 04 场景 */
.scen-list{display:flex;flex-direction:column}
.scen{
  display:grid;grid-template-columns:172px 1fr;gap:36px;
  padding:20px 0;border-top:1px solid var(--line);align-items:start;
}
.scen-role{
  font-size:11.5px;font-weight:800;letter-spacing:.06em;color:var(--accent);
  padding-top:4px;line-height:1.5;
}
.scen h3{font-size:15.3px;font-weight:700;margin-bottom:5px;color:var(--ink);letter-spacing:-.01em}
.scen p{font-size:13.9px;line-height:1.8;color:var(--ink-2)}

/* 05 使用方法 */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:34px}
.step{padding-top:20px;border-top:2px solid var(--ink)}
.step-num{
  font-size:32px;font-weight:800;letter-spacing:-.04em;line-height:1;
  color:var(--accent);margin-bottom:14px;
}
.step h3{font-size:14.8px;font-weight:700;margin-bottom:7px;color:var(--ink)}
.step p{font-size:13.2px;line-height:1.78;color:var(--ink-2)}
.step code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:12px;background:#F3F1F8;border:1px solid var(--line);
  padding:1px 5px;border-radius:4px;color:var(--ink);
}

.plans{
  margin-top:48px;background:var(--paper);border:1px solid var(--line-2);
  border-radius:var(--radius);padding:26px 30px;
  display:flex;flex-wrap:wrap;gap:22px;align-items:center;justify-content:space-between;
}
.plans p{font-size:14px;line-height:1.8;color:var(--ink-2);max-width:600px}
.plans strong{color:var(--ink);font-weight:650}
.plan-tags{display:flex;flex-wrap:wrap;gap:8px}
.plan-tag{
  font-size:12px;font-weight:650;padding:5px 12px;border-radius:6px;
  background:var(--bg);border:1px solid var(--line);color:var(--ink-2);
  white-space:nowrap;
}
.plan-tag.hot{background:var(--accent);border-color:var(--accent);color:#fff}

/* 06 FAQ */
.faq-list{border-top:1px solid var(--line-2)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  padding:19px 46px 19px 0;font-size:15px;font-weight:650;color:var(--ink);
  cursor:pointer;list-style:none;position:relative;line-height:1.6;
  transition:color .18s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--accent)}
.faq-item summary::after{
  content:"";position:absolute;right:8px;top:50%;
  width:11px;height:11px;margin-top:-6px;
  border-right:1.6px solid var(--muted);border-bottom:1.6px solid var(--muted);
  transform:rotate(45deg);transition:transform .22s var(--ease);
}
.faq-item[open] summary::after{transform:rotate(-135deg);margin-top:-2px;border-color:var(--accent)}
.faq-body{
  padding:0 46px 22px 0;font-size:14px;line-height:1.9;color:var(--ink-2);
}
.faq-body a{
  color:var(--accent);text-decoration:underline;text-underline-offset:3px;
  text-decoration-thickness:1px;text-decoration-color:#C4B0E8;
}
.faq-body a:hover{text-decoration-color:var(--accent)}

/* 07 资讯 */
.news-list{border-top:1px solid var(--line-2)}
.news-item{
  display:grid;grid-template-columns:118px 1fr;gap:36px;
  padding:20px 0;border-bottom:1px solid var(--line);align-items:start;
}
.news-date{
  font-size:12.2px;font-weight:650;color:var(--muted);
  letter-spacing:.03em;padding-top:4px;font-variant-numeric:tabular-nums;
}
.news-item h3{font-size:15.2px;font-weight:700;margin-bottom:6px;color:var(--ink);line-height:1.55}
.news-item p{font-size:13.8px;line-height:1.8;color:var(--ink-2);margin-bottom:7px}
.news-src{font-size:11.5px;font-weight:600;color:var(--muted);letter-spacing:.02em}

/* ============ 页脚 ============ */
.site-footer{
  margin-top:40px;border-top:1px solid var(--line-2);
  background:#F6F4FA;padding:48px 0 32px;
}
.footer-grid{
  display:flex;flex-wrap:wrap;gap:36px;justify-content:space-between;align-items:flex-start;
}
.footer-brand{display:flex;align-items:center;gap:10px;font-weight:750;font-size:15px;margin-bottom:9px}
.footer-brand .brand-img{width:28px;height:28px;border-radius:7px}
.footer-note{font-size:13.2px;line-height:1.8;color:var(--ink-2);max-width:430px}
.footer-links{display:flex;flex-wrap:wrap;gap:8px 26px;font-size:13.2px;color:var(--ink-2)}
.footer-links a{padding:2px 0;border-bottom:1px solid transparent;transition:.18s var(--ease)}
.footer-links a:hover{color:var(--accent);border-bottom-color:var(--accent)}
.footer-copy{
  margin-top:32px;padding-top:22px;border-top:1px solid var(--line);
  font-size:12px;color:var(--muted);line-height:1.8;
}

/* ============ 响应式 ============ */
@media (max-width:1080px){
  .doc-grid{grid-template-columns:minmax(0,1fr);gap:0}
  .toc{display:none}
  .hero-grid{gap:52px}
}
@media (max-width:920px){
  .hero{padding:56px 0 68px}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .lede{max-width:none;font-size:16px}
  .mock{max-width:520px}
  .intro-cols{grid-template-columns:1fr;gap:36px}
  .feat-grid{grid-template-columns:1fr;gap:0}
  .reason{grid-template-columns:1fr;gap:8px}
  .reason-gain{padding-left:22px}
  .scen{grid-template-columns:1fr;gap:6px}
  .scen-role{padding-top:0}
  .steps{grid-template-columns:1fr 1fr;gap:28px}
  .news-item{grid-template-columns:1fr;gap:6px}
  .news-date{padding-top:0}
  .topnav{display:none}

  .feat p{font-size:14.5px}
  .scen p{font-size:14.5px}
  .step p{font-size:14px}
  .faq-body{font-size:14.5px}
  .news-item p{font-size:14.5px}
  .reason-pain,.reason-gain{font-size:14.8px}
}

@media (max-width:600px){
  .shell{padding:0 20px}
  .topbar-in{padding:0 20px;height:58px}
  .brand small{display:none}
  .brand-img{width:30px;height:30px}
  .btn-line{display:none}
  .metrics{gap:26px 34px}
  .metrics div{flex:1 1 120px}
  .steps{grid-template-columns:1fr}
  .sec{padding-bottom:56px}
  .plans{padding:22px}
  .faq-body{padding-right:0}

  /* ===== 移动端字体 ===== */
  body{font-size:17px}

  .brand{font-size:17px}
  .btn{font-size:15px}
  .btn-lg{padding:13px 24px;font-size:16px}

  .kicker{font-size:12.5px;letter-spacing:.1em}
  .lede{font-size:16.5px;line-height:1.85}
  .metrics dt{font-size:20px}
  .metrics dd{font-size:13.5px}

  .mock-title{font-size:12.5px}
  .mock-task p{font-size:14.5px}
  .chip{font-size:12px;padding:6px 12px}
  .out-card b{font-size:13px}
  .out-card small{font-size:11px}

  .sec-num{font-size:12.5px}
  .sec-head h2{font-size:22px;line-height:1.32}
  .sec-lede{font-size:16px;line-height:1.85;margin-bottom:30px}

  .intro-text p{font-size:16px;line-height:1.9}
  .pull{font-size:16px;line-height:1.8;padding-left:18px}
  .facts .k{font-size:11.5px;letter-spacing:.1em}
  .facts .v{font-size:15.5px}

  .feat{padding:20px 0}
  .feat h3{font-size:17px;gap:9px}
  .feat h3 .n{font-size:12px}
  .feat p{font-size:15.5px;line-height:1.85}
  .tag{font-size:13px;padding:4px 11px}

  .reason{padding:18px 0;gap:6px}
  .reason-pain,.reason-gain{font-size:15.5px;line-height:1.8}
  .reason-gain::before{font-size:15px}

  .scen{padding:18px 0;gap:5px}
  .scen-role{font-size:12.5px;letter-spacing:.05em}
  .scen h3{font-size:17px;margin-bottom:6px}
  .scen p{font-size:15.5px;line-height:1.85}

  .step-num{font-size:30px;margin-bottom:12px}
  .step h3{font-size:17px}
  .step p{font-size:15.5px;line-height:1.85}
  .step code{font-size:13.5px;padding:2px 6px}
  .plans p{font-size:15.5px;line-height:1.85}
  .plan-tag{font-size:13.5px;padding:6px 13px}

  .faq-item summary{font-size:16.5px;line-height:1.65;padding:18px 38px 18px 0}
  .faq-body{font-size:15.5px;line-height:1.9;padding-bottom:20px}

  .news-date{font-size:13px}
  .news-item h3{font-size:17px;line-height:1.6}
  .news-item p{font-size:15.5px;line-height:1.85}
  .news-src{font-size:12.5px}

  .footer-brand{font-size:16.5px}
  .footer-note{font-size:15px;line-height:1.85}
  .footer-links{font-size:15px;gap:12px 26px}
  .footer-copy{font-size:13px}
}

@media (prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}