:root{
      --bg:#f7f5ff;
      --bg2:#ffffff;
      --card:#ffffff;
      --text:#1f2330;
      --muted:#5c6477;
      --line:#e7e1f8;
      --primary:#7a35ff;
      --primary2:#b14dff;
      --accent:#ff5fd7;
      --good:#18a16b;
      --shadow:0 18px 45px rgba(97,53,255,.12);
      --shadow2:0 10px 28px rgba(26,25,58,.08);
      --radius:20px;
      --container:1180px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(122,53,255,.12), transparent 26%),
        radial-gradient(circle at top right, rgba(255,95,215,.10), transparent 24%),
        linear-gradient(180deg, #fcfbff 0%, #f6f4ff 42%, #f7f5ff 100%);
    }
    a{color:inherit;text-decoration:none}
    img{max-width:100%;display:block}
    .container{width:min(var(--container), calc(100% - 32px)); margin:0 auto}
    .site-header{
      position:sticky; top:0; z-index:50;
      backdrop-filter:blur(14px);
      background:rgba(251,249,255,.78);
      border-bottom:1px solid rgba(124,83,255,.10);
    }
    .nav{
      display:flex; align-items:center; justify-content:space-between; gap:16px;
      min-height:76px;
    }
    .brand{display:flex; align-items:center; gap:12px; min-width:0}
    .brand .ai-page-logo{width:42px; height:42px; object-fit:contain; border-radius:12px; background:#fff; box-shadow:var(--shadow2)}
    .brand-text{display:flex; flex-direction:column; line-height:1.15}
    .brand-text strong{font-size:17px}
    .brand-text span{font-size:12px; color:var(--muted)}
    .nav-toggle{display:none; border:1px solid var(--line); background:#fff; color:var(--text); padding:10px 12px; border-radius:12px}
    .nav-links{display:flex; align-items:center; gap:16px; flex-wrap:wrap; justify-content:flex-end}
    .nav-links a{font-size:14px; color:var(--muted); padding:8px 10px; border-radius:999px}
    .nav-links a:hover{background:rgba(122,53,255,.08); color:var(--primary)}
    .cta-link{
      background:linear-gradient(135deg, var(--primary), var(--accent));
      color:#fff !important; box-shadow:0 12px 28px rgba(122,53,255,.24);
    }
    .hero{padding:34px 0 18px}
    .hero-grid{
      display:grid; grid-template-columns:1.2fr .8fr; gap:22px; align-items:stretch;
    }
    .hero-main,.hero-side,.panel,.card,.faq-item,.form-wrap,.table-wrap,.note-box{
      background:linear-gradient(180deg, rgba(255,255,255,.96), rgba(255,255,255,.92));
      border:1px solid rgba(130,102,214,.14);
      box-shadow:var(--shadow);
      border-radius:var(--radius);
    }
    .hero-main{padding:30px; position:relative; overflow:hidden}
    .hero-main:before,.hero-main:after{
      content:""; position:absolute; border-radius:50%; pointer-events:none;
      background:radial-gradient(circle, rgba(177,77,255,.18), transparent 65%);
    }
    .hero-main:before{width:240px; height:240px; right:-80px; top:-80px}
    .hero-main:after{width:180px; height:180px; left:40%; bottom:-100px}
    .eyebrow{display:inline-flex; align-items:center; gap:8px; padding:8px 12px; border-radius:999px; background:rgba(122,53,255,.08); color:var(--primary); font-size:13px; font-weight:700}
    h1{font-size:clamp(30px, 4vw, 54px); line-height:1.08; margin:16px 0 14px; letter-spacing:-.02em}
    .lead{font-size:17px; line-height:1.8; color:var(--muted); max-width:62ch}
    .hero-actions{display:flex; gap:12px; flex-wrap:wrap; margin-top:22px}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      padding:13px 18px; border-radius:14px; border:1px solid transparent; font-weight:700;
      transition:.25s ease; cursor:pointer;
    }
    .btn-primary{background:linear-gradient(135deg, var(--primary), var(--primary2)); color:#fff; box-shadow:0 14px 28px rgba(122,53,255,.24)}
    .btn-secondary{background:#fff; color:var(--text); border-color:var(--line)}
    .btn:hover{transform:translateY(-2px)}
    .hero-points{display:grid; grid-template-columns:repeat(3,1fr); gap:12px; margin-top:22px}
    .mini{
      padding:14px; border-radius:16px; background:rgba(122,53,255,.05); border:1px solid rgba(122,53,255,.12)
    }
    .mini strong{display:block; font-size:20px; margin-bottom:4px}
    .mini span{font-size:13px; color:var(--muted)}
    .hero-side{padding:22px; display:grid; gap:14px}
    .side-card{padding:18px; background:linear-gradient(180deg,#fff, #faf7ff); border:1px solid var(--line); border-radius:18px}
    .side-card h3{margin:0 0 8px; font-size:18px}
    .side-card p,.side-card li{color:var(--muted); line-height:1.7; font-size:14px}
    .side-card ul{margin:0; padding-left:18px}
    .section{padding:18px 0}
    .section-head{display:flex; justify-content:space-between; align-items:end; gap:12px; margin-bottom:14px}
    .section-head h2{margin:0; font-size:28px}
    .section-head p{margin:0; color:var(--muted); max-width:60ch; line-height:1.75}
    .grid-4{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
    .grid-2{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
    .card{padding:20px}
    .card h3{margin:0 0 10px; font-size:18px}
    .card p,.card li{margin:0; color:var(--muted); line-height:1.75; font-size:14px}
    .icon{
      width:44px; height:44px; border-radius:14px; display:grid; place-items:center; margin-bottom:14px;
      background:linear-gradient(135deg, rgba(122,53,255,.12), rgba(255,95,215,.12));
      color:var(--primary); font-weight:800;
    }
    .tag-cloud{display:flex; flex-wrap:wrap; gap:10px}
    .tag-cloud span{padding:9px 12px; border-radius:999px; background:#fff; border:1px solid var(--line); color:var(--muted); font-size:13px}
    .panel{padding:22px}
    .flow{display:grid; grid-template-columns:repeat(5,1fr); gap:12px}
    .step{padding:18px; border-radius:18px; background:linear-gradient(180deg,#fff, #faf8ff); border:1px solid var(--line); position:relative}
    .step .num{display:inline-flex; align-items:center; justify-content:center; width:32px; height:32px; border-radius:50%; background:rgba(122,53,255,.1); color:var(--primary); font-weight:800; margin-bottom:12px}
    .compare{width:100%; border-collapse:separate; border-spacing:0; overflow:hidden}
    .table-wrap{overflow:auto; padding:8px}
    table th,table td{padding:14px 12px; border-bottom:1px solid var(--line); text-align:left; vertical-align:top; font-size:14px}
    table th{background:rgba(122,53,255,.06); color:#2a2050}
    table td{color:var(--muted); background:#fff}
    .rating{display:inline-flex; gap:4px; color:#f4a51c; font-size:18px}
    .quote{
      display:grid; gap:12px; min-height:100%;
    }
    .quote p{font-size:15px; color:var(--text); line-height:1.8}
    .quote .meta{display:flex; justify-content:space-between; color:var(--muted); font-size:13px}
    .stats{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
    .stat{
      padding:20px; border-radius:18px; background:linear-gradient(160deg, #fff, #f8f5ff);
      border:1px solid var(--line)
    }
    .stat strong{display:block; font-size:30px; color:var(--primary); margin-bottom:8px}
    .stat span{color:var(--muted); line-height:1.6; font-size:14px}
    .article-list,.help-list{display:grid; gap:12px}
    .article-item,.help-item{
      padding:16px 18px; background:#fff; border:1px solid var(--line); border-radius:16px; display:flex; justify-content:space-between; gap:12px; align-items:center
    }
    .article-item a,.help-item a{color:var(--text); font-weight:700}
    .article-item small,.help-item small{color:var(--muted)}
    .faq{display:grid; gap:12px}
    .faq-item{overflow:hidden}
    .faq-q{
      width:100%; border:0; background:transparent; padding:18px 18px; display:flex; align-items:center; justify-content:space-between; gap:10px; font-size:16px; font-weight:700; color:var(--text); cursor:pointer
    }
    .faq-a{max-height:0; overflow:hidden; transition:max-height .28s ease}
    .faq-a > div{padding:0 18px 18px; color:var(--muted); line-height:1.8; font-size:14px}
    .faq-item.open .faq-a{max-height:180px}
    .form-wrap{padding:22px}
    .form-grid{display:grid; grid-template-columns:repeat(2,1fr); gap:12px}
    .field{display:flex; flex-direction:column; gap:8px}
    .field.full{grid-column:1/-1}
    label{font-size:14px; color:var(--text); font-weight:700}
    input,select,textarea{
      width:100%; border:1px solid var(--line); border-radius:14px; padding:13px 14px; font:inherit; color:var(--text); background:#fff; outline:none;
    }
    textarea{min-height:118px; resize:vertical}
    input:focus,select:focus,textarea:focus{border-color:rgba(122,53,255,.45); box-shadow:0 0 0 4px rgba(122,53,255,.08)}
    .footer{
      margin-top:10px; padding:26px 0 30px; border-top:1px solid rgba(130,102,214,.12);
      background:linear-gradient(180deg, rgba(248,245,255,.75), rgba(244,240,255,.95));
    }
    .footer-grid{display:grid; grid-template-columns:1.1fr .9fr 1fr; gap:16px}
    .footer a{color:var(--primary)}
    .contact-row{display:grid; gap:10px; color:var(--muted); font-size:14px}
    .social{display:flex; flex-wrap:wrap; gap:10px}
    .social a{padding:9px 12px; border-radius:999px; background:#fff; border:1px solid var(--line)}
    .small{font-size:13px; color:var(--muted); line-height:1.75}
    .float-tools{
      position:fixed; right:16px; bottom:16px; z-index:60; display:grid; gap:10px;
    }
    .float-tools a,.backtop{
      width:52px; height:52px; border-radius:16px; display:grid; place-items:center; border:0; box-shadow:var(--shadow); cursor:pointer;
      background:linear-gradient(135deg, var(--primary), var(--accent)); color:#fff; font-size:12px; font-weight:700;
    }
    .backtop{background:#fff; color:var(--primary); border:1px solid var(--line)}
    .floating-panel{
      position:fixed; left:16px; bottom:16px; z-index:60; width:min(320px, calc(100vw - 32px));
      background:#fff; border:1px solid var(--line); border-radius:18px; box-shadow:var(--shadow); overflow:hidden;
    }
    .floating-panel header{padding:14px 16px; background:linear-gradient(135deg, rgba(122,53,255,.08), rgba(255,95,215,.08)); display:flex; justify-content:space-between; align-items:center}
    .floating-panel .content{padding:14px 16px; display:grid; gap:10px}
    .floating-panel .content img{width:100%; border-radius:14px; border:1px solid var(--line)}
    .floating-panel .content a{color:var(--primary); font-weight:700}
    .scroll-reveal{opacity:0; transform:translateY(18px); transition:.55s ease}
    .scroll-reveal.show{opacity:1; transform:none}
    .muted{color:var(--muted)}
    .section-anchor{scroll-margin-top:92px}
    @media (max-width: 980px){
      .hero-grid,.grid-4,.stats,.grid-3,.grid-2,.footer-grid,.flow{grid-template-columns:1fr 1fr}
      .flow{grid-template-columns:1fr 1fr 1fr}
      .hero-points{grid-template-columns:1fr}
    }
    @media (max-width: 720px){
      .nav-toggle{display:inline-flex}
      .nav-links{
        position:absolute; left:16px; right:16px; top:76px; display:none; flex-direction:column; align-items:stretch;
        padding:12px; background:#fff; border:1px solid var(--line); border-radius:18px; box-shadow:var(--shadow)
      }
      .nav-links.open{display:flex}
      .nav-links a{padding:12px 14px}
      .hero-grid,.grid-4,.stats,.grid-3,.grid-2,.footer-grid,.flow,.form-grid{grid-template-columns:1fr}
      .section-head{flex-direction:column; align-items:flex-start}
      .hero-main{padding:22px}
      .hero{padding-top:22px}
      .article-item,.help-item{flex-direction:column; align-items:flex-start}
      .floating-panel{display:none}
    }