/* ============================================================
   AIUSEE 元演AI - 风格沿用 workbuddy.imcmic.com（品牌绿浅色 B2B）
   Design tokens 与 WB 站一致；支持 [data-theme="dark"] 暗色变量
   ============================================================ */
:root {
  --brand:#33B895; --brand-dark:#2AA07E; --brand-deep:#15906A; --brand-teal:#2DD4BF;
  --brand-50:#F0FDF8; --brand-100:#E6F7F1; --brand-200:#B6E6D4;
  --ink:#0F172A; --ink-2:#1E293B; --muted:#475569; --muted-2:#64748B; --muted-3:#94A3B8;
  --bg:#FFFFFF; --bg-2:#F8FAFC; --bg-3:#F1F5F9;
  --line:#E5E7EB; --line-2:#E9EEF3;
  --card:#FFFFFF;
  --shadow:0 1px 2px rgba(15,23,42,.04);
  --shadow-lg:0 18px 40px -12px rgba(15,23,42,.14);
  --shadow-brand:0 16px 34px -14px rgba(51,184,149,.55);
  --r:14px; --r-lg:20px;
  --maxw:1200px;
  --grad:linear-gradient(135deg,var(--brand) 0%,var(--brand-dark) 100%);
}
[data-theme="dark"]{
  --ink:#F1F5F9; --ink-2:#E2E8F0; --muted:#A5B2C4; --muted-2:#94A3B8; --muted-3:#7A8BA3;
  --bg:#0B1220; --bg-2:#0F172A; --bg-3:#131E33;
  --line:#22304A; --line-2:#1B2740;
  --card:#111C30;
  --brand-50:#0E2A24; --brand-100:#123329; --brand-200:#1D5545;
  --shadow:0 1px 2px rgba(0,0,0,.3);
  --shadow-lg:0 18px 40px -12px rgba(0,0,0,.6);
  --shadow-brand:0 16px 34px -14px rgba(45,212,191,.35);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Helvetica Neue',Arial,'PingFang SC','Microsoft YaHei',sans-serif;
  background:var(--bg);color:var(--ink-2);line-height:1.65;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
  transition:background .3s,color .3s;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
button{font:inherit;cursor:pointer;background:none;border:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* ---------- 顶部导航 ---------- */
.topbar{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.85);
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid transparent;transition:border-color .3s,background .3s}
[data-theme="dark"] .topbar{background:rgba(11,18,32,.85)}
.topbar.scrolled{border-bottom-color:var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px;gap:18px}
.logo{display:flex;align-items:center;gap:10px}
.logo-mark{display:grid;place-items:center}
.logo-text{font-size:19px;font-weight:800;color:var(--ink);letter-spacing:.2px}
.logo-text em{font-style:normal;margin-left:7px;font-size:12.5px;font-weight:600;color:var(--brand-deep);letter-spacing:1px}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{font-size:15px;color:var(--muted-2);padding:9px 13px;border-radius:9px;transition:color .2s,background .2s;font-weight:500}
.nav-links a:hover{color:var(--brand-deep);background:var(--brand-50)}
.nav-right{display:flex;align-items:center;gap:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 24px;border-radius:11px;
  font-size:15px;font-weight:600;transition:transform .2s,box-shadow .2s,background .2s,border-color .2s,color .2s;white-space:nowrap}
.btn-primary{background:var(--grad);color:#fff;box-shadow:var(--shadow-brand)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 20px 40px -12px rgba(51,184,149,.7)}
.btn-ghost{background:var(--card);color:var(--ink);border:1px solid var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand-deep);transform:translateY(-2px)}
.btn-sm{padding:10px 18px;font-size:14px}
.btn-block{width:100%}
.burger{display:none;flex-direction:column;gap:5px;padding:8px}
.burger span{width:22px;height:2px;background:var(--ink);border-radius:2px;transition:transform .3s,opacity .3s}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- Hero ---------- */
.hero{position:relative;padding:150px 0 90px;overflow:hidden;
  background:
    radial-gradient(900px 460px at 88% -10%, rgba(45,212,191,.16), transparent 60%),
    radial-gradient(760px 420px at -6% 20%, rgba(51,184,149,.12), transparent 55%),
    linear-gradient(180deg,var(--bg-3),var(--bg) 62%)}
.hero-inner{display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center}
.pill{display:inline-flex;align-items:center;padding:7px 15px;border-radius:999px;font-size:13px;font-weight:600;
  color:var(--brand-deep);background:var(--brand-50);border:1px solid var(--brand-200);margin-bottom:22px;letter-spacing:.4px}
.hero h1{font-size:clamp(32px,4.6vw,52px);font-weight:800;line-height:1.22;color:var(--ink);letter-spacing:-.5px}
.grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{margin:22px 0 30px;font-size:16.5px;color:var(--muted);max-width:560px;line-height:1.85}
.hero-sub b{color:var(--ink);font-weight:700}
.hero-cta{display:flex;gap:13px;flex-wrap:wrap}
.hero-stats{display:flex;gap:40px;margin-top:46px;flex-wrap:wrap}
.stat{display:flex;flex-direction:column;gap:3px}
.stat .numrow{display:flex;align-items:flex-start;gap:2px;line-height:1}
.stat b{display:inline-block;font-size:30px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .suf{display:inline-block;font-style:normal;font-size:22px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-top:3px}
.stat .lab{font-size:13.5px;color:var(--muted-2);display:block;margin-top:4px}
.hero-visual{position:relative;display:flex;justify-content:center}
.demo-card{width:min(420px,100%);background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow-lg);padding:22px;position:relative}
.demo-card::before{content:"";position:absolute;inset:-1px;border-radius:inherit;padding:1px;
  background:linear-gradient(135deg,rgba(45,212,191,.5),rgba(51,184,149,.06));-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
  -webkit-mask-composite:xor;mask-composite:exclude;pointer-events:none}
.demo-top{display:flex;align-items:center;gap:8px;padding-bottom:14px;border-bottom:1px dashed var(--line);margin-bottom:16px}
.demo-top .dot{width:9px;height:9px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px var(--brand-50)}
.demo-title{font-size:14px;font-weight:700;color:var(--ink)}
.demo-row{display:flex;gap:8px;margin-bottom:9px;flex-wrap:wrap}
.chip{padding:6px 12px;border-radius:8px;font-size:12.5px;font-weight:600;color:var(--muted-2);background:var(--bg-3);border:1px solid var(--line)}
.chip-ok{color:var(--brand-deep);background:var(--brand-50);border-color:var(--brand-200)}
.demo-line{display:flex;align-items:center;gap:10px;margin-top:13px}
.demo-tag{flex:0 0 34px;font-size:11.5px;font-weight:700;color:var(--brand-deep)}
.demo-bar{flex:1;height:8px;border-radius:99px;background:var(--bg-3);overflow:hidden}
.demo-bar i{display:block;height:100%;border-radius:99px;background:var(--grad)}
.demo-val{font-size:11.5px;color:var(--muted-3);font-variant-numeric:tabular-nums}
.demo-foot{margin-top:18px;padding-top:13px;border-top:1px dashed var(--line);font-size:12px;color:var(--muted-3);display:flex;align-items:center;gap:6px}
.demo-foot::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--brand);animation:pulse 1.6s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.35}}

/* ---------- 版块通用 ---------- */
.sec{padding:92px 0}
.sec-alt{background:var(--bg-2)}
.sec-head{max-width:780px;margin:0 auto 50px;text-align:center}
.sec-head.left{margin-left:0;text-align:left}
.eyebrow{display:inline-flex;font-size:12px;font-weight:800;letter-spacing:2.4px;color:var(--brand);
  text-transform:uppercase;margin-bottom:14px}
.sec-head h2{font-size:clamp(24px,3vw,34px);font-weight:800;color:var(--ink);letter-spacing:-.3px;line-height:1.3}
.sec-head p{margin-top:14px;font-size:15.5px;color:var(--muted);line-height:1.8}
.sec-head p b{color:var(--brand-deep)}

/* ---------- 服务卡片 ---------- */
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.card{padding:28px 24px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  display:flex;flex-direction:column;transition:transform .28s,border-color .28s,box-shadow .28s}
.card:hover{transform:translateY(-4px);border-color:var(--brand-200);box-shadow:var(--shadow-lg)}
.ico-box{width:52px;height:52px;border-radius:13px;display:grid;place-items:center;color:#fff;
  background:var(--grad);box-shadow:var(--shadow-brand);margin-bottom:18px}
.card h3{font-size:18px;font-weight:800;color:var(--ink);margin-bottom:10px}
.card p{font-size:13.5px;color:var(--muted);line-height:1.8;flex:1}
.tags{display:flex;flex-wrap:wrap;gap:7px;margin-top:16px}
.tag{padding:4px 11px;border-radius:7px;font-size:12px;font-weight:600;background:var(--brand-50);
  color:var(--brand-deep);border:1px solid var(--brand-200)}
.more{display:inline-block;margin-top:16px;font-size:13.5px;font-weight:700;color:var(--brand-deep)}
.more:hover{color:var(--brand-dark)}

/* ---------- 生态库 ---------- */
.tabs{display:flex;gap:9px;justify-content:center;flex-wrap:wrap;margin-bottom:36px}
.tab{padding:10px 20px;border-radius:10px;border:1px solid var(--line);background:var(--card);color:var(--muted-2);
  font-size:14px;font-weight:600;transition:all .2s}
.tab:hover{color:var(--brand-deep);border-color:var(--brand-200)}
.tab.active{background:var(--grad);color:#fff;border-color:transparent;box-shadow:var(--shadow-brand)}
.eco-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.eco-card{padding:24px 22px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  transition:transform .28s,border-color .28s,box-shadow .28s;animation:fadeUp .4s ease both}
.eco-card:hover{transform:translateY(-4px);border-color:var(--brand-200);box-shadow:var(--shadow-lg)}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:none}}
.eco-head{display:flex;align-items:flex-start;justify-content:space-between;gap:10px;margin-bottom:10px}
.eco-head h3{font-size:16.5px;font-weight:800;color:var(--ink)}
.eco-type{flex:0 0 auto;font-size:11.5px;font-weight:700;padding:4px 10px;border-radius:99px;color:var(--brand-deep);
  background:var(--brand-50);border:1px solid var(--brand-200);white-space:nowrap}
.eco-desc{font-size:13px;color:var(--muted);line-height:1.8;margin-bottom:13px}
.eco-meta{display:flex;flex-wrap:wrap;gap:6px}
.eco-meta span{font-size:12px;padding:4px 9px;border-radius:7px;background:var(--bg-3);border:1px solid var(--line);color:var(--muted-2)}
.eco-meta span b{color:var(--ink);font-weight:600}

/* ---------- 合作流程 ---------- */
.steps2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.stepc{position:relative;padding:26px 24px;background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);
  transition:transform .28s,border-color .28s,box-shadow .28s}
.stepc:hover{transform:translateY(-4px);border-color:var(--brand-200);box-shadow:var(--shadow-lg)}
.stepc .n{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;font-size:14px;font-weight:800;color:#fff;
  background:var(--grad);margin-bottom:14px;box-shadow:var(--shadow-brand)}
.stepc h3{font-size:17px;font-weight:800;color:var(--ink);margin-bottom:8px}
.stepc p{font-size:13.5px;color:var(--muted);line-height:1.8}
.flow{display:flex;align-items:center;gap:8px;flex-wrap:wrap;margin-top:15px}
.flow span{font-size:12.5px;font-weight:600;color:var(--brand-deep);background:var(--brand-50);
  border:1px solid var(--brand-200);padding:5px 12px;border-radius:8px}
.flow i{font-style:normal;color:var(--muted-3);font-size:12px}

/* ---------- 为什么选 ---------- */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.scene{background:var(--card);border:1px solid var(--line);border-radius:var(--r-lg);padding:26px 24px;
  transition:transform .28s,border-color .28s,box-shadow .28s}
.scene:hover{transform:translateY(-4px);border-color:var(--brand-200);box-shadow:var(--shadow-lg)}
.scene h3{font-size:16.5px;font-weight:800;color:var(--ink);margin-bottom:10px;line-height:1.45}
.scene p{font-size:13.5px;color:var(--muted);line-height:1.85}

/* ---------- 合作伙伴 ---------- */
.logo-wall{display:grid;grid-template-columns:repeat(6,1fr);gap:14px}
.logo-item{display:flex;flex-direction:column;align-items:center;gap:5px;padding:22px 10px;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r);text-align:center;transition:all .25s}
.logo-item:hover{transform:translateY(-3px);border-color:var(--brand-200);box-shadow:var(--shadow-lg)}
.logo-item b{font-size:15.5px;font-weight:800;color:var(--ink)}
.logo-item span{font-size:12px;color:var(--muted-3)}

/* ---------- FAQ ---------- */
.faq-list{max-width:820px;margin:0 auto;display:grid;gap:12px}
.faq-item{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:border-color .2s,box-shadow .2s}
.faq-item:hover{border-color:var(--brand-200)}
.faq-item[open]{border-color:var(--brand-200);box-shadow:var(--shadow)}
.faq-item summary{list-style:none;cursor:pointer;padding:18px 22px;font-size:15.5px;font-weight:700;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:14px;transition:color .2s}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";flex:0 0 auto;font-size:20px;font-weight:400;color:var(--brand);transition:transform .25s;line-height:1}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{padding:0 22px 20px;font-size:14px;color:var(--muted);line-height:1.9}

/* ---------- 联系我们 ---------- */
.cta-sec{background:linear-gradient(180deg,var(--bg-2),var(--bg))}
.cta-band{display:grid;grid-template-columns:1fr 1fr;gap:40px;background:var(--card);border:1px solid var(--line);
  border-radius:24px;padding:44px;box-shadow:var(--shadow-lg)}
.cta-copy h2{font-size:clamp(24px,3vw,32px);font-weight:800;color:var(--ink);letter-spacing:-.3px;margin-bottom:14px}
.cta-copy>p{font-size:15px;color:var(--muted);line-height:1.85;margin-bottom:26px}
.cta-contacts{display:grid;gap:13px}
.contact-line{display:flex;align-items:center;gap:13px;padding:13px 16px;border-radius:12px;background:var(--bg-2);
  border:1px solid var(--line);transition:all .2s}
a.contact-line:hover{border-color:var(--brand-200);transform:translateX(3px)}
.contact-line .ci{width:38px;height:38px;border-radius:10px;display:grid;place-items:center;font-size:16px;color:#fff;
  background:var(--grad);flex:0 0 auto;font-style:normal}
.contact-line b{display:block;font-size:11.5px;color:var(--muted-3);font-weight:600}
.contact-line span span:last-child{font-size:15px;font-weight:700;color:var(--ink)}
.cta-form{display:grid;gap:14px;align-content:start}
.f-field{display:grid;gap:7px}
.f-field label{font-size:13px;font-weight:600;color:var(--muted-2)}
.f-field input,.f-field select,.f-field textarea{width:100%;padding:12px 15px;border-radius:11px;border:1px solid var(--line);
  background:var(--bg);color:var(--ink);font-size:14.5px;font-family:inherit;transition:border-color .2s,box-shadow .2s}
.f-field input:focus,.f-field select:focus,.f-field textarea:focus{outline:none;border-color:var(--brand);
  box-shadow:0 0 0 3px rgba(51,184,149,.14)}
.f-field input::placeholder,.f-field textarea::placeholder{color:var(--muted-3)}
.form-tip{font-size:12px;color:var(--muted-3);text-align:center}

/* ---------- 页脚 ---------- */
.footer{border-top:1px solid var(--line);background:var(--bg-2);padding:44px 0 36px}
.foot-inner{display:flex;flex-direction:column;gap:22px}
.foot-brand p{font-size:13px;color:var(--muted-2);margin-top:8px;line-height:1.7}
.foot-links{display:flex;gap:8px;flex-wrap:wrap}
.foot-links a{font-size:14px;color:var(--muted-2);padding:6px 10px;border-radius:8px;transition:all .2s}
.foot-links a:hover{color:var(--brand-deep);background:var(--brand-50)}
.foot-legal{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;border-top:1px solid var(--line);
  padding-top:20px;font-size:12.5px;color:var(--muted-3)}
.foot-legal a:hover{color:var(--brand-deep)}

/* ---------- 版块入场动画（默认可见，JS 通过 .reveal/.in 控制） ---------- */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
}
@media (max-width:1024px){
  .grid4{grid-template-columns:repeat(2,1fr)}
  .eco-grid{grid-template-columns:repeat(2,1fr)}
  .grid3{grid-template-columns:repeat(2,1fr)}
  .logo-wall{grid-template-columns:repeat(3,1fr)}
  .hero-inner{grid-template-columns:1fr;gap:44px}
  .hero-visual{order:-1}
}
@media (max-width:768px){
  .sec{padding:64px 0}
  .nav-links{position:fixed;top:66px;left:0;right:0;flex-direction:column;align-items:stretch;gap:2px;
    background:var(--bg);border-bottom:1px solid var(--line);padding:12px 16px 18px;transform:translateY(-140%);
    transition:transform .3s;display:flex;box-shadow:var(--shadow-lg)}
  .nav-links.open{transform:none}
  .nav-links a{padding:12px 10px;font-size:16px}
  .burger{display:flex}
  .hero{padding:120px 0 60px}
  .grid4,.eco-grid,.grid3{grid-template-columns:1fr}
  .steps2{grid-template-columns:1fr}
  .logo-wall{grid-template-columns:repeat(2,1fr)}
  .cta-band{grid-template-columns:1fr;padding:28px 22px}
  .hero-stats{gap:26px}
  .foot-legal{flex-direction:column}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001s !important;transition-duration:.001s !important}
}

/* ============================================================
   博客页（GEO 内容）
   ============================================================ */
.post-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.post-card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-lg);padding:26px 24px;transition:transform .28s,border-color .28s,box-shadow .28s}
.post-card:hover{transform:translateY(-4px);border-color:var(--brand-200);box-shadow:var(--shadow-lg)}
.post-card .cat{font-size:11.5px;font-weight:800;letter-spacing:.6px;color:var(--brand);text-transform:uppercase;margin-bottom:10px}
.post-card h3{font-size:19px;font-weight:800;color:var(--ink);line-height:1.45;margin-bottom:10px}
.post-card h3 a:hover{color:var(--brand-deep)}
.post-card p{font-size:13.5px;color:var(--muted);line-height:1.85;flex:1}
.post-card .meta{margin-top:16px;display:flex;gap:14px;font-size:12px;color:var(--muted-3)}
.blog-hero{padding:150px 0 40px;text-align:left}
.blog-hero .eyebrow{margin-bottom:12px}
.blog-hero h1{font-size:clamp(26px,3.4vw,38px);font-weight:800;color:var(--ink);letter-spacing:-.4px}
.blog-hero p{margin-top:12px;font-size:15.5px;color:var(--muted);max-width:640px;line-height:1.85}
.art-wrap{max-width:780px;margin:0 auto;padding:0 22px}
.art-head{padding:60px 0 12px;text-align:left}
.art-head h1{font-size:clamp(26px,3.6vw,40px);font-weight:800;color:var(--ink);line-height:1.3;letter-spacing:-.4px;margin:12px 0 14px}
.art-head .sub{font-size:15.5px;color:var(--muted);line-height:1.85;margin-bottom:18px}
.art-meta{display:flex;align-items:center;gap:10px;flex-wrap:wrap;padding-bottom:20px;border-bottom:1px solid var(--line);font-size:13px;color:var(--muted-3)}
.art-meta .sep{opacity:.5}
.art-body{padding:34px 0 10px}
.art-body h2{font-size:23px;font-weight:800;color:var(--ink);margin:38px 0 14px;letter-spacing:-.3px}
.art-body h3{font-size:18px;font-weight:700;color:var(--ink-2);margin:26px 0 10px}
.art-body p{font-size:15.5px;color:var(--ink-2);line-height:2;margin-bottom:16px}
.art-body strong{color:var(--ink);font-weight:700}
.art-body ul,.art-body ol{margin:0 0 18px 22px}
.art-body li{font-size:15.5px;color:var(--ink-2);line-height:1.95;margin-bottom:6px}
.art-body a{color:var(--brand-deep);font-weight:600;border-bottom:1px dashed var(--brand-200)}
.art-body a:hover{color:var(--brand)}
.art-body blockquote{border-left:3px solid var(--brand);background:var(--brand-50);padding:14px 18px;border-radius:0 10px 10px 0;margin:20px 0;color:var(--muted);font-size:14.5px;line-height:1.9}
.art-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px}
.art-body th{background:var(--bg-3);text-align:left;padding:10px 12px;font-weight:700;color:var(--ink)}
.art-body td{padding:10px 12px;border-bottom:1px solid var(--line);color:var(--ink-2)}
.art-body code{background:var(--bg-3);padding:2px 7px;border-radius:6px;font-size:13px;color:var(--brand-deep)}
.cta-box{margin:36px 0 14px;background:var(--brand-50);border:1px solid var(--brand-200);border-radius:var(--r-lg);padding:26px 24px}
.cta-box h3{font-size:18px;font-weight:800;color:var(--ink);margin-bottom:8px}
.cta-box p{font-size:14px;color:var(--muted);line-height:1.85;margin-bottom:16px}
.author-box{display:flex;gap:14px;align-items:flex-start;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px 24px;margin:34px 0 8px}
.author-box .a-avatar{flex:0 0 auto;width:46px;height:46px;border-radius:12px;display:grid;place-items:center;color:#fff;background:var(--grad);font-weight:800;font-size:18px}
.author-box b{display:block;font-size:14.5px;color:var(--ink)}
.author-box span{font-size:13px;color:var(--muted);line-height:1.7;display:block;margin-top:4px}
.related{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:14px}
.related a{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--r);padding:14px 16px;font-size:13px;font-weight:700;color:var(--ink);transition:all .22s}
.related a:hover{color:var(--brand-deep);border-color:var(--brand-200);transform:translateY(-2px)}
.art-foot-link{display:block;text-align:center;margin:30px 0 10px;font-size:14px;color:var(--muted-2)}
.art-foot-link a{color:var(--brand-deep);font-weight:700}
@media (max-width:768px){
  .post-grid{grid-template-columns:1fr}
  .related{grid-template-columns:1fr}
  .art-body h2{font-size:20px}
  .blog-hero{padding:120px 0 24px}
}
.rel-title{font-size:17px;font-weight:800;color:var(--ink);margin:36px 0 0}

/* ---------- 平台业务入口（biz） ---------- */
.biz-sec{background:linear-gradient(180deg,var(--bg),var(--bg-2))}
.biz-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.biz-card{position:relative;display:block;background:var(--card);border:1px solid var(--line);border-radius:22px;
  padding:34px 30px 26px;overflow:hidden;transition:transform .3s,box-shadow .3s,border-color .3s}
.biz-card::before{content:"";position:absolute;inset:0 0 auto 0;height:5px;background:var(--grad);opacity:.9}
.biz-card.tint-b::before{background:linear-gradient(135deg,#4F7CFF,#6366F1,#8B5CF6)}
.biz-card:hover{transform:translateY(-6px);border-color:var(--brand-200);box-shadow:var(--shadow-lg)}
.biz-badge{position:absolute;top:20px;right:22px;font-size:11.5px;font-weight:800;letter-spacing:.5px;
  padding:5px 12px;border-radius:99px;color:var(--brand-deep);background:var(--brand-50);border:1px solid var(--brand-200)}
.biz-card.tint-b .biz-badge{color:#4F46E5;background:#EEF2FF;border-color:#C7D2FE}
.biz-head{display:flex;align-items:center;gap:16px;margin:6px 0 14px}
.biz-ico{flex:0 0 auto;width:56px;height:56px;border-radius:16px;display:grid;place-items:center;
  font-size:24px;font-weight:800;color:#fff;background:var(--grad);box-shadow:var(--shadow-brand)}
.biz-card.tint-b .biz-ico{background:linear-gradient(135deg,#4F7CFF,#8B5CF6);box-shadow:0 14px 28px -10px rgba(99,102,241,.5)}
.biz-name{font-size:22px;font-weight:800;color:var(--ink);letter-spacing:-.3px}
.biz-desc{display:block;font-size:14.5px;color:var(--muted);line-height:1.9;min-height:66px}
.biz-cta{display:inline-flex;align-items:center;gap:8px;margin-top:20px;font-size:15px;font-weight:800;color:var(--brand-deep)}
.biz-cta i{font-style:normal;transition:transform .25s}
.biz-card:hover .biz-cta i{transform:translateX(5px)}
.biz-card.tint-b .biz-cta{color:#4F46E5}
@media (max-width:860px){
  .biz-grid{grid-template-columns:1fr}
  .biz-name{font-size:19px}
  .biz-desc{min-height:0}
}