:root{
      --ink:#182236;
      --muted:#607087;
      --paper:#fffdf9;
      --line:#e8e8e4;
      --blue:#2457e6;
      --cyan:#20b9bf;
      --orange:#ff7b45;
      --yellow:#ffd34e;
      --pink:#ed5b92;
      --navy:#101b36;
      --shadow:0 18px 48px rgba(27,44,79,.1);
      --radius:18px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.7}
    a{color:inherit;text-decoration:none}
    img{max-width:100%;height:auto;display:block}
    .container{width:min(1180px,calc(100% - 36px));margin:0 auto}
    .topbar{position:sticky;top:0;z-index:20;background:rgba(255,253,249,.94);border-bottom:1px solid rgba(232,232,228,.9);backdrop-filter:blur(14px)}
    .nav{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:24px}
    .brand{display:flex;align-items:center;gap:12px;flex-shrink:0;font-weight:800;letter-spacing:.5px}
    .ai-page-logo{width:42px;max-width:100%;height:auto}
    .brand-text{font-size:18px}
    .nav-links{display:flex;align-items:center;gap:0;flex-wrap:wrap;justify-content:flex-end}
    .nav-links a{font-size:13px;color:#44536b;padding:8px 10px;transition:.25s}
    .nav-links a:hover{color:var(--blue)}
    .nav-cta,.button{display:inline-flex;align-items:center;justify-content:center;border:0;cursor:pointer;font:inherit;font-weight:700;transition:transform .25s,box-shadow .25s,background .25s}
    .nav-cta{padding:10px 16px;border-radius:10px;background:var(--blue);color:#fff;margin-left:14px}
    .button{padding:13px 21px;border-radius:11px;background:var(--blue);color:#fff;box-shadow:0 8px 18px rgba(36,87,230,.2)}
    .button:hover,.nav-cta:hover{transform:translateY(-2px);box-shadow:0 12px 24px rgba(36,87,230,.25)}
    .button.alt{background:var(--orange);box-shadow:0 8px 18px rgba(255,123,69,.2)}
    .menu-toggle{display:none;border:0;background:none;font-size:26px;color:var(--ink)}
    .hero{position:relative;overflow:hidden;background:#f1f6ff;padding:84px 0 70px;border-bottom:1px solid #dfe9ff}
    .hero:before,.hero:after{content:"";position:absolute;pointer-events:none}
    .hero:before{width:380px;height:380px;right:-120px;top:-100px;background:var(--yellow);border-radius:50%;opacity:.8}
    .hero:after{width:240px;height:240px;left:-90px;bottom:-120px;background:var(--cyan);transform:rotate(25deg);opacity:.35}
    .hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.12fr .88fr;align-items:center;gap:60px}
    .eyebrow,.section-kicker{font-size:12px;font-weight:800;letter-spacing:2px;text-transform:uppercase;color:var(--blue)}
    h1{font-size:clamp(38px,5vw,68px);line-height:1.1;letter-spacing:0;margin:14px 0 22px;max-width:700px}
    .hero-copy{font-size:18px;color:#53627a;max-width:650px;margin:0 0 30px}
    .actions{display:flex;flex-wrap:wrap;gap:12px}
    .button.ghost{background:#fff;color:var(--blue);border:1px solid #cbd9ff;box-shadow:none}
    .signal-panel{background:var(--navy);color:#fff;border-radius:24px;padding:28px;box-shadow:var(--shadow);transform:rotate(1.5deg)}
    .signal-panel h2{font-size:22px;margin:0 0 8px}
    .signal-panel p{color:#cbd5e9;margin:0 0 22px}
    .signal-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .signal-item{padding:16px;background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.13);border-radius:12px}
    .signal-item b{display:block;font-size:25px;color:var(--yellow);line-height:1.2}
    .signal-item span{font-size:12px;color:#d4dced}
    section{padding:86px 0}
    .section-head{display:flex;justify-content:space-between;align-items:end;gap:24px;margin-bottom:34px}
    .section-head h2{font-size:clamp(28px,3.5vw,44px);line-height:1.2;margin:8px 0 0;letter-spacing:0}
    .section-head p{max-width:510px;color:var(--muted);margin:0}
    .metrics{background:#fff;border-bottom:1px solid var(--line);padding:28px 0}
    .metric-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
    .metric{background:#fff;padding:22px 24px}
    .metric strong{font-size:31px;color:var(--blue);display:block}
    .metric span{font-size:14px;color:var(--muted)}
    .about{background:#fff}
    .about-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px;align-items:start}
    .about-lead{font-size:22px;line-height:1.55;margin:0;color:#283750}
    .about-text{color:var(--muted);margin-top:18px}
    .pill-list{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
    .pill{padding:8px 12px;background:#fff2e9;color:#b5532e;border-radius:999px;font-size:13px}
    .capability-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .capability{padding:25px;background:#fff;border:1px solid var(--line);border-top:4px solid var(--blue);border-radius:var(--radius);transition:.25s}
    .capability:nth-child(2){border-top-color:var(--orange)}
    .capability:nth-child(3){border-top-color:var(--cyan)}
    .capability:hover,.review:hover,.case:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
    .capability h3{margin:0 0 8px;font-size:19px}
    .capability p{margin:0;color:var(--muted);font-size:14px}
    .dark-section{background:var(--navy);color:#fff}
    .dark-section .section-kicker{color:var(--yellow)}
    .dark-section .section-head p{color:#bdc8dc}
    .service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
    .service{min-height:172px;padding:20px;background:#172744;border:1px solid #2a3c5e;border-radius:15px;transition:.25s}
    .service:hover{background:#203459;transform:translateY(-4px)}
    .service h3{font-size:17px;margin:0 0 7px;color:#fff}
    .service p{font-size:13px;color:#b9c7dc;margin:0}
    .service .tag{display:inline-block;color:var(--yellow);font-size:11px;margin-bottom:12px;font-weight:700}
    .steps{display:grid;grid-template-columns:repeat(5,1fr);gap:0;border-top:2px solid var(--blue)}
    .step{padding:23px 17px 8px;border-right:1px solid var(--line);position:relative}
    .step:last-child{border-right:0}
    .step-number{position:absolute;top:-17px;left:17px;width:32px;height:32px;border-radius:50%;background:var(--blue);color:#fff;text-align:center;line-height:32px;font-weight:800}
    .step h3{margin:23px 0 7px;font-size:17px}
    .step p{font-size:14px;color:var(--muted);margin:0}
    .solution{background:#fff4ed}
    .solution-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
    .solution-item{padding:25px;background:#fff;border-left:5px solid var(--orange);border-radius:12px}
    .solution-item h3{margin:0 0 7px}
    .solution-item p{margin:0;color:var(--muted)}
    .timeline{border-left:2px solid var(--cyan);padding-left:26px}
    .timeline-item{position:relative;margin:0 0 26px}
    .timeline-item:before{content:"";position:absolute;width:12px;height:12px;border-radius:50%;background:var(--cyan);left:-33px;top:8px}
    .timeline-item h3{margin:0 0 4px}
    .timeline-item p{margin:0;color:var(--muted)}
    .table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px;background:#fff}
    table{border-collapse:collapse;width:100%;min-width:780px}
    th,td{text-align:left;padding:16px 18px;border-bottom:1px solid var(--line);font-size:14px}
    th{background:#f4f7ff;color:var(--blue);font-weight:800}
    tr:last-child td{border-bottom:0}
    .rating-box{display:flex;align-items:center;gap:24px;margin-bottom:22px;padding:22px 25px;background:#fff6cf;border:1px solid #f0df8d;border-radius:14px}
    .rating-score{font-size:48px;line-height:1;color:var(--orange);font-weight:900}
    .stars{color:#f2a900;font-size:21px;letter-spacing:2px}
    .rating-box p{margin:3px 0 0;color:#65552a}
    .cases{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
    .case{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;transition:.25s}
    .case-media{aspect-ratio:16/8;background:#eef2f8;overflow:hidden}
    .case-media img{width:100%;height:100%;object-fit:cover}
    .case-body{padding:20px}
    .case-body h3{margin:0 0 7px}
    .case-body p{margin:0;color:var(--muted);font-size:14px}
    .reviews{background:#f5f7fc}
    .review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .review{padding:22px;background:#fff;border-radius:15px;border:1px solid #e2e7f0;transition:.25s}
    .review p{margin:0 0 18px;color:#42516a;font-size:15px}
    .review strong{font-size:14px}
    .review small{display:block;color:var(--muted);margin-top:3px}
    .articles{display:grid;grid-template-columns:1fr 1fr;gap:12px}
    .article-link{display:flex;justify-content:space-between;gap:16px;padding:17px 20px;border:1px solid var(--line);background:#fff;border-radius:10px;color:#32425e}
    .article-link span{color:var(--blue);font-weight:700}
    .faq-list{max-width:900px;margin:0 auto}
    .faq-item{border-bottom:1px solid var(--line)}
    .faq-question{width:100%;display:flex;justify-content:space-between;align-items:center;text-align:left;padding:19px 0;border:0;background:none;color:var(--ink);font:inherit;font-weight:700;cursor:pointer}
    .faq-question span{font-size:22px;color:var(--blue);transition:.25s}
    .faq-answer{display:none;color:var(--muted);padding:0 34px 18px 0;font-size:14px}
    .faq-item.open .faq-answer{display:block}
    .faq-item.open .faq-question span{transform:rotate(45deg)}
    .contact{background:#eaf8f5}
    .contact-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:50px;align-items:start}
    .contact-copy h2{font-size:38px;line-height:1.2;margin:8px 0 16px}
    .contact-copy p{color:var(--muted)}
    .contact-list{list-style:none;padding:0;margin:24px 0 0}
    .contact-list li{margin:8px 0;color:#3f5269}
    form{background:#fff;padding:26px;border-radius:16px;border:1px solid #d7ebe6;box-shadow:0 14px 30px rgba(35,88,79,.08)}
    .form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
    label{display:block;font-size:13px;font-weight:700;color:#34445e}
    input,select,textarea{width:100%;margin-top:7px;border:1px solid #d8dee8;border-radius:8px;padding:12px 13px;font:inherit;color:var(--ink);background:#fff}
    textarea{resize:vertical;min-height:118px}
    .full{grid-column:1/-1}
    .form-note{font-size:12px;color:var(--muted);margin:14px 0 0}
    .support{padding:55px 0;background:#fff}
    .support-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
    .support-box{padding:22px;background:#f7f8fb;border:1px solid var(--line);border-radius:14px}
    .support-box h3{margin:0 0 12px}
    .support-box p{color:var(--muted);margin:0 0 12px}
    .support-links{display:flex;flex-wrap:wrap;gap:10px}
    .support-links a{font-size:13px;color:var(--blue);padding:7px 10px;background:#fff;border:1px solid #d9e1f4;border-radius:7px}
    .qr{width:108px;border-radius:8px;margin-top:12px}
    footer{background:#101b36;color:#ccd6e6;padding:34px 0 25px}
    .footer-grid{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:30px}
    footer h3{color:#fff;margin:0 0 12px;font-size:17px}
    footer p{margin:5px 0;font-size:13px}
    footer a{color:#ccd6e6;font-size:13px}
    footer a:hover{color:var(--yellow)}
    .footer-links{display:flex;flex-wrap:wrap;gap:8px 14px}
    .copyright{border-top:1px solid #2b3a58;margin-top:25px;padding-top:18px;font-size:12px;color:#91a0b9}
    .float-contact{position:fixed;right:18px;bottom:20px;z-index:15;background:var(--orange);color:#fff;padding:12px 15px;border-radius:12px;box-shadow:0 10px 26px rgba(255,123,69,.3);font-weight:700;font-size:13px}
    .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s,transform .7s}
    .reveal.visible{opacity:1;transform:none}
    @media(max-width:980px){
      .nav-links{display:none;position:absolute;top:76px;left:0;right:0;padding:12px 18px;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 12px 20px rgba(24,34,54,.08)}
      .nav-links.open{display:flex;flex-direction:column;align-items:stretch}
      .nav-links a{padding:10px 5px}
      .nav-cta{margin:8px 0 0;text-align:center}
      .menu-toggle{display:block}
      .hero-grid,.about-grid,.contact-grid{grid-template-columns:1fr;gap:35px}
      .hero{padding-top:65px}
      .service-grid{grid-template-columns:repeat(2,1fr)}
      .steps{grid-template-columns:repeat(3,1fr);gap:20px;border-top:0}
      .step{border:0;border-top:2px solid var(--blue)}
      .footer-grid{grid-template-columns:1fr 1fr}
    }
    @media(max-width:640px){
      .container{width:min(100% - 28px,1180px)}
      section{padding:62px 0}
      .section-head{display:block}
      .section-head p{margin-top:15px}
      .metric-grid,.capability-grid,.service-grid,.cases,.review-grid,.solution-grid,.articles,.support-grid{grid-template-columns:1fr}
      .metric-grid{gap:1px}
      .metric{padding:17px}
      .steps{grid-template-columns:1fr;gap:16px}
      .step{padding-bottom:0}
      .rating-box{align-items:flex-start;gap:15px}
      .rating-score{font-size:38px}
      .form-grid{grid-template-columns:1fr}
      .full{grid-column:auto}
      .footer-grid{grid-template-columns:1fr}
      h1{font-size:42px}
      .signal-panel{transform:none}
    }