:root{
      --bg:#f6f7fb;
      --surface:#ffffff;
      --surface-2:#f1f4fb;
      --line:#d9e2f2;
      --text:#1d2736;
      --muted:#5e6b7f;
      --brand:#4f6dff;
      --brand-2:#8e5cff;
      --accent:#11b3a5;
      --warm:#ff7a59;
      --shadow:0 18px 40px rgba(29,39,54,.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",Roboto,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
      color:var(--text);
      background:
        radial-gradient(circle at top left, rgba(79,109,255,.14), transparent 30%),
        radial-gradient(circle at top right, rgba(17,179,165,.12), transparent 24%),
        linear-gradient(180deg, #fbfcff 0%, #f4f7fd 100%);
    }
    a{color:inherit;text-decoration:none}
    img{display:block;max-width:100%}
    .container{width:min(100% - 32px, var(--container)); margin:0 auto}
    header{
      position:sticky; top:0; z-index:50;
      backdrop-filter:blur(14px);
      background:rgba(251,252,255,.78);
      border-bottom:1px solid rgba(217,226,242,.7);
    }
    .nav{
      display:flex; align-items:center; justify-content:space-between; gap:18px;
      padding:14px 0;
    }
    .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:0 8px 18px rgba(79,109,255,.12)}
    .brand-text{display:flex; flex-direction:column; line-height:1.1}
    .brand-text strong{font-size:1.02rem}
    .brand-text span{font-size:.82rem; color:var(--muted)}
    .nav-links{display:flex; align-items:center; gap:16px; flex-wrap:wrap; justify-content:flex-end}
    .nav-links a{font-size:.95rem; color:var(--muted); padding:8px 10px; border-radius:999px; transition:.2s ease}
    .nav-links a:hover{color:var(--text); background:rgba(79,109,255,.08)}
    .nav-cta{display:flex; align-items:center; gap:10px}
    .btn{
      display:inline-flex; align-items:center; justify-content:center; gap:8px;
      border:1px solid transparent; border-radius:999px;
      padding:12px 18px; font-weight:700; transition:.22s ease;
      cursor:pointer; white-space:nowrap;
    }
    .btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2)); color:#fff; box-shadow:0 12px 24px rgba(79,109,255,.22)}
    .btn-primary:hover{transform:translateY(-2px); box-shadow:0 16px 28px rgba(79,109,255,.26)}
    .btn-ghost{background:#fff; color:var(--text); border-color:var(--line)}
    .btn-ghost:hover{border-color:#b9c7ef; transform:translateY(-1px)}
    .menu-btn{display:none; background:#fff; border:1px solid var(--line); border-radius:12px; width:44px; height:44px; align-items:center; justify-content:center}
    .menu-btn span,.menu-btn span:before,.menu-btn span:after{content:""; display:block; width:18px; height:2px; background:var(--text); border-radius:99px; position:relative}
    .menu-btn span:before{position:absolute; top:-6px}
    .menu-btn span:after{position:absolute; top:6px}
    .hero{
      padding:40px 0 18px;
    }
    .hero-grid{
      display:grid; grid-template-columns:1.15fr .85fr; gap:24px; align-items:stretch;
    }
    .hero-main{
      padding:30px; border-radius:28px; background:
        linear-gradient(135deg, rgba(255,255,255,.92), rgba(244,247,253,.92)),
        radial-gradient(circle at 20% 0%, rgba(142,92,255,.16), transparent 26%),
        radial-gradient(circle at 85% 10%, rgba(17,179,165,.12), transparent 20%);
      border:1px solid rgba(217,226,242,.9); box-shadow:var(--shadow); position:relative; overflow:hidden;
    }
    .hero-main:before{
      content:""; position:absolute; inset:auto -100px -120px auto; width:280px; height:280px;
      background:conic-gradient(from 180deg, rgba(79,109,255,.25), rgba(17,179,165,.18), rgba(255,122,89,.16), rgba(79,109,255,.25));
      filter:blur(24px); border-radius:50%; opacity:.65;
    }
    .eyebrow{display:inline-flex; gap:8px; align-items:center; background:rgba(79,109,255,.08); color:#3550c8; padding:8px 12px; border-radius:999px; font-weight:700; font-size:.9rem}
    h1{font-size:clamp(2rem, 4vw, 3.6rem); line-height:1.05; margin:16px 0 14px}
    .lead{font-size:1.05rem; color:var(--muted); line-height:1.8; margin:0 0 20px; max-width:56ch}
    .hero-actions{display:flex; flex-wrap:wrap; gap:12px; margin-bottom:20px}
    .hero-points{display:grid; grid-template-columns:repeat(3,1fr); gap:12px}
    .point{
      background:rgba(255,255,255,.82); border:1px solid rgba(217,226,242,.85);
      padding:14px; border-radius:18px; box-shadow:0 10px 24px rgba(29,39,54,.04)
    }
    .point strong{display:block; font-size:1.15rem}
    .point span{color:var(--muted); font-size:.9rem}
    .hero-side{
      display:grid; gap:16px;
    }
    .side-card{
      background:linear-gradient(180deg,#fff, #f8faff);
      border:1px solid var(--line); border-radius:24px; box-shadow:var(--shadow); padding:22px;
    }
    .side-card h3{margin:0 0 12px; font-size:1.08rem}
    .tags{display:flex; flex-wrap:wrap; gap:10px}
    .tag{padding:8px 12px; border-radius:999px; background:rgba(79,109,255,.08); color:#3550c8; font-size:.88rem; font-weight:600}
    .metrics{
      display:grid; grid-template-columns:repeat(4,1fr); gap:16px; margin:16px 0 0;
    }
    .metric{
      padding:20px; border-radius:22px; background:var(--surface); border:1px solid var(--line); box-shadow:0 10px 28px rgba(29,39,54,.05)
    }
    .metric strong{display:block; font-size:1.55rem}
    .metric span{color:var(--muted); font-size:.92rem}
    section{padding:24px 0}
    .section-head{display:flex; align-items:end; justify-content:space-between; gap:18px; margin-bottom:16px}
    .section-head h2{margin:0; font-size:clamp(1.4rem, 2.2vw, 2rem)}
    .section-head p{margin:0; color:var(--muted); max-width:64ch; line-height:1.7}
    .grid-3{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .grid-2{display:grid; grid-template-columns:repeat(2,1fr); gap:16px}
    .card{
      background:var(--surface); border:1px solid var(--line); border-radius:24px; padding:22px; box-shadow:0 12px 30px rgba(29,39,54,.05);
      transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease;
    }
    .card:hover{transform:translateY(-3px); box-shadow:0 18px 36px rgba(29,39,54,.09); border-color:#c8d5f4}
    .card h3,.card h4{margin:0 0 10px}
    .card p{margin:0; color:var(--muted); line-height:1.75}
    .icon{
      width:46px; height:46px; border-radius:14px; display:grid; place-items:center; margin-bottom:14px;
      background:linear-gradient(135deg, rgba(79,109,255,.12), rgba(17,179,165,.12)); color:#3050cb; font-weight:800
    }
    .process{display:grid; grid-template-columns:repeat(4,1fr); gap:16px}
    .step{position:relative}
    .step .num{
      width:40px; height:40px; border-radius:50%; background:linear-gradient(135deg,var(--brand),var(--brand-2)); color:#fff;
      display:grid; place-items:center; font-weight:800; margin-bottom:12px
    }
    .step:after{
      content:""; position:absolute; right:-8px; top:20px; width:16px; height:2px; background:linear-gradient(90deg,var(--line),transparent)
    }
    .step:last-child:after{display:none}
    .table-wrap{overflow:auto; border:1px solid var(--line); border-radius:22px; background:#fff; box-shadow:var(--shadow)}
    table{width:100%; border-collapse:collapse; min-width:780px}
    th,td{padding:16px 18px; border-bottom:1px solid #edf1f8; text-align:left; vertical-align:top}
    th{background:#f7f9ff; font-size:.95rem}
    td{color:var(--muted); line-height:1.65}
    .pill{display:inline-flex; padding:6px 10px; border-radius:999px; font-size:.84rem; font-weight:700}
    .pill.ok{background:rgba(17,179,165,.12); color:#0b7e74}
    .pill.warn{background:rgba(255,122,89,.12); color:#b14c2e}
    .compare{
      display:grid; grid-template-columns:1.02fr .98fr; gap:16px;
    }
    .rating{
      background:linear-gradient(135deg, rgba(79,109,255,.08), rgba(17,179,165,.08)); border:1px solid rgba(79,109,255,.12)
    }
    .rating .score{font-size:3rem; font-weight:900; line-height:1; margin:6px 0 10px}
    .stars{color:#ffb400; letter-spacing:2px; font-size:1.15rem}
    .reviews{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .review .meta{display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom:12px}
    .review .role{color:#3550c8; font-weight:700; font-size:.9rem}
    .quote{font-size:1.02rem; color:var(--text); line-height:1.75}
    .timeline{display:grid; gap:14px}
    .timeline-item{display:grid; grid-template-columns:110px 1fr; gap:16px; align-items:start; padding:18px 20px; border-radius:20px; background:#fff; border:1px solid var(--line)}
    .timeline-item strong{color:#3550c8}
    .faq-item{
      border:1px solid var(--line); border-radius:18px; background:#fff; overflow:hidden;
    }
    .faq-q{
      width:100%; border:0; background:transparent; padding:18px 18px; font-size:1rem; font-weight:700; color:var(--text);
      display:flex; align-items:center; justify-content:space-between; text-align:left; cursor:pointer
    }
    .faq-a{max-height:0; overflow:hidden; transition:max-height .28s ease; color:var(--muted); padding:0 18px}
    .faq-item.open .faq-a{max-height:220px; padding-bottom:18px}
    .faq-item.open .chev{transform:rotate(180deg)}
    .chev{transition:transform .22s ease}
    .articles{display:grid; grid-template-columns:repeat(3,1fr); gap:16px}
    .article-card{padding:20px; border-radius:22px; border:1px solid var(--line); background:linear-gradient(180deg,#fff,#f8faff)}
    .article-card .date{font-size:.86rem; color:#7a8798; margin-bottom:10px}
    .form-wrap{display:grid; grid-template-columns:1fr .86fr; gap:16px}
    form{
      display:grid; gap:12px; padding:22px; border:1px solid var(--line); border-radius:24px; background:#fff; box-shadow:var(--shadow)
    }
    .field{display:grid; gap:8px}
    label{font-weight:700; font-size:.95rem}
    input,select,textarea{
      width:100%; border:1px solid #d8e2f2; border-radius:14px; padding:13px 14px; font:inherit; color:var(--text); background:#fbfcff;
      outline:none; transition:border-color .2s ease, box-shadow .2s ease
    }
    input:focus,select:focus,textarea:focus{border-color:#8aa0ef; box-shadow:0 0 0 4px rgba(79,109,255,.1)}
    textarea{min-height:126px; resize:vertical}
    .contact-box{
      padding:22px; border:1px solid var(--line); border-radius:24px; background:
        linear-gradient(180deg, rgba(79,109,255,.06), rgba(17,179,165,.05)), #fff;
      box-shadow:var(--shadow)
    }
    .contact-box .ai-page-image{border-radius:18px; border:1px solid var(--line); margin-top:14px}
    .footer{
      margin-top:10px; padding:24px 0 30px; background:#eef3fb; border-top:1px solid #dce5f4; color:var(--text)
    }
    .footer-grid{display:grid; grid-template-columns:1.1fr .9fr .9fr; gap:16px}
    .footer a{color:#304fca}
    .footer small{color:var(--muted)}
    .floating{
      position:fixed; right:16px; bottom:16px; z-index:60; display:grid; gap:10px
    }
    .float-btn{
      width:48px; height:48px; border-radius:16px; background:linear-gradient(135deg,var(--brand),var(--brand-2)); color:#fff;
      display:grid; place-items:center; box-shadow:0 16px 30px rgba(79,109,255,.28)
    }
    .customer{
      position:fixed; left:16px; bottom:16px; z-index:60; width:min(92vw,360px); background:#fff; border:1px solid var(--line);
      border-radius:22px; box-shadow:var(--shadow); overflow:hidden; transform:translateY(110%); transition:transform .28s ease
    }
    .customer.show{transform:translateY(0)}
    .customer .top{display:flex; justify-content:space-between; align-items:center; padding:14px 16px; background:#f7f9ff; border-bottom:1px solid #e5ebf6}
    .customer .body{padding:16px; display:grid; gap:12px}
    .customer .body img{max-width:180px; border-radius:14px; margin:0 auto}
    .mobile-only{display:none}
    .anchor-bar{display:flex; flex-wrap:wrap; gap:10px}
    .anchor-bar a{padding:8px 12px; border-radius:999px; background:#fff; border:1px solid var(--line); color:var(--muted)}
    .anchor-bar a:hover{color:var(--text)}
    .muted{color:var(--muted)}
    @media (max-width: 980px){
      .hero-grid,.grid-3,.grid-2,.process,.compare,.reviews,.articles,.form-wrap,.footer-grid,.metrics,.grid-3,.hero-points{grid-template-columns:1fr 1fr}
      .hero-grid,.compare,.form-wrap,.footer-grid{grid-template-columns:1fr}
      .process{grid-template-columns:1fr 1fr}
      .reviews,.articles,.grid-3,.metrics{grid-template-columns:1fr 1fr}
      .hero-points{grid-template-columns:1fr}
      .nav-links{display:none}
      .menu-btn{display:inline-flex}
      .mobile-only{display:block}
    }
    @media (max-width: 640px){
      .container{width:min(100% - 22px, var(--container))}
      .hero-main,.side-card,.card,form,.contact-box{padding:18px}
      .metrics,.grid-3,.grid-2,.process,.reviews,.articles{grid-template-columns:1fr}
      .section-head{align-items:flex-start; flex-direction:column}
      .timeline-item{grid-template-columns:1fr}
      .btn{width:100%}
      .hero-actions{flex-direction:column}
      .nav-cta{display:none}
      .nav-links.open{
        display:flex; position:absolute; left:16px; right:16px; top:74px; flex-direction:column; padding:14px; border-radius:18px;
        background:#fff; border:1px solid var(--line); box-shadow:var(--shadow)
      }
      .floating{right:12px; bottom:12px}
      .customer{left:12px; right:12px; width:auto}
    }
    .fade-up{animation:fadeUp .7s ease both}
    @keyframes fadeUp{from{opacity:0; transform:translateY(14px)} to{opacity:1; transform:translateY(0)}}