:root {
      color-scheme: light;
      --ink: #182138;
      --muted: #59647a;
      --paper: #f7f8fc;
      --white: #fff;
      --line: #e0e4ee;
      --blue: #3656e8;
      --violet: #7044dc;
      --pink: #e7458b;
      --lime: #c9f36a;
      --teal: #138d89;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; }
    button, input, select, textarea { font: inherit; }
    img { max-width: 100%; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky; top: 0; z-index: 20;
      background: rgba(255,255,255,.96);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(12px);
    }
    .header-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { display: block; width: 38px; max-width: 100%; height: auto; }
    .nav-wrap { display: flex; align-items: center; gap: 18px; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 9px 8px; color: #39445b; text-decoration: none; font-size: 13px; border-radius: 5px; }
    .nav-links a:hover { color: var(--blue); background: #f0f2ff; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: white; color: var(--ink); padding: 8px 12px; border-radius: 5px; }
    .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 46px; padding: 11px 19px; border: 0; border-radius: 5px;
      background: var(--blue); color: #fff; font-weight: 700; text-decoration: none;
      box-shadow: 0 7px 18px rgba(54,86,232,.2); transition: transform .2s, box-shadow .2s, background .2s;
    }
    .button:hover { transform: translateY(-2px); box-shadow: 0 10px 23px rgba(54,86,232,.28); background: #2949d4; }
    .button-light { color: var(--ink); background: white; box-shadow: none; border: 1px solid #dce1ed; }
    .button-light:hover { color: var(--blue); background: white; }
    .button-dark { background: var(--ink); box-shadow: none; }
    .hero {
      overflow: hidden; position: relative; padding: 76px 0 62px;
      background: linear-gradient(118deg, #f7f8fc 0%, #eef0ff 50%, #fff1f6 100%);
      border-bottom: 1px solid #e3e5f3;
    }
    .hero::before {
      content: ""; position: absolute; width: 390px; height: 390px; border-radius: 50%;
      border: 1px solid rgba(54,86,232,.16); right: max(4%, calc((100vw - 1320px)/2)); top: 20px;
      box-shadow: 0 0 0 38px rgba(54,86,232,.035), 0 0 0 78px rgba(231,69,139,.025);
      animation: orbit 24s linear infinite;
    }
    .hero::after { content: ""; position: absolute; width: 14px; height: 14px; top: 108px; right: 16%; border-radius: 3px; transform: rotate(45deg); background: var(--pink); }
    .hero-inner { position: relative; z-index: 1; max-width: 760px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--violet); font-size: 13px; font-weight: 800; }
    .eyebrow::before { content: ""; width: 24px; height: 3px; background: var(--pink); }
    h1 { max-width: 680px; margin: 16px 0 18px; font-size: clamp(38px, 6vw, 70px); line-height: 1.08; letter-spacing: 0; }
    .hero p { max-width: 650px; color: #46516a; font-size: 18px; margin: 0 0 28px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .proof-line { margin-top: 28px; display: flex; flex-wrap: wrap; gap: 10px 24px; color: #47536a; font-size: 13px; }
    .proof-line span::before { content: "✓"; color: var(--teal); font-weight: 900; margin-right: 7px; }
    .hero-edge { height: 6px; margin-top: 50px; max-width: 530px; background: linear-gradient(90deg, var(--blue) 0 28%, var(--pink) 28% 56%, #f4b735 56% 79%, var(--teal) 79%); }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; background: white; border: 1px solid var(--line); border-top: 0; }
    .metric { padding: 22px 24px; border-right: 1px solid var(--line); }
    .metric:last-child { border: 0; }
    .metric strong { display: block; font-size: 24px; line-height: 1.2; color: var(--blue); }
    .metric span { display: block; margin-top: 6px; color: var(--muted); font-size: 13px; }
    main { overflow: hidden; }
    .section { padding: 76px 0; }
    .section + .section { border-top: 1px solid #e9ebf2; }
    .section-heading { max-width: 760px; margin-bottom: 30px; }
    .section-heading .eyebrow { margin-bottom: 9px; }
    h2 { margin: 0 0 12px; font-size: clamp(28px, 4vw, 40px); line-height: 1.2; letter-spacing: 0; }
    .section-heading p, .lead { margin: 0; color: var(--muted); font-size: 16px; }
    .intro-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: start; }
    .intro-copy p { color: var(--muted); margin: 0 0 14px; }
    .feature-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 20px; margin-top: 24px; }
    .feature-list div { padding: 13px 0; border-top: 1px solid var(--line); font-weight: 700; }
    .feature-list small { display: block; color: var(--muted); font-weight: 400; margin-top: 3px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .service-item { padding: 22px; background: white; border: 1px solid var(--line); border-top: 3px solid var(--blue); transition: transform .2s, box-shadow .2s; }
    .service-item:nth-child(3n+2) { border-top-color: var(--pink); }
    .service-item:nth-child(3n) { border-top-color: var(--teal); }
    .service-item:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(26,38,75,.08); }
    .service-item h3 { margin: 0 0 8px; font-size: 18px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-item .tag { display: inline-block; margin-top: 14px; color: #4b5872; font-size: 12px; border-bottom: 2px solid var(--lime); }
    .band { background: #202b49; color: white; }
    .band .section-heading p { color: #d1d8ea; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; }
    .step { position: relative; padding: 18px 20px 18px 0; border-top: 1px solid #65708b; counter-increment: step; }
    .step::before { content: "0" counter(step); display: block; margin-bottom: 14px; color: var(--lime); font-size: 13px; font-weight: 800; }
    .step h3 { margin: 0 0 7px; font-size: 17px; }
    .step p { margin: 0; color: #d1d8ea; font-size: 14px; }
    .solution-row { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: start; }
    .solution-list { margin: 0; padding: 0; list-style: none; columns: 2; column-gap: 28px; }
    .solution-list li { break-inside: avoid; padding: 8px 0; border-bottom: 1px solid var(--line); color: #414c64; font-size: 14px; }
    .solution-list li::before { content: "↗"; color: var(--pink); margin-right: 8px; font-weight: 800; }
    .platforms { margin-top: 27px; display: flex; flex-wrap: wrap; gap: 8px; }
    .platforms span { display: inline-block; padding: 7px 10px; border: 1px solid #dfe3ee; background: white; color: #3f4960; font-size: 13px; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .case { background: white; border: 1px solid var(--line); }
    .case .case-top { padding: 20px 22px 0; }
    .case small { color: var(--pink); font-weight: 800; }
    .case h3 { margin: 7px 0 8px; font-size: 19px; }
    .case p { padding: 0 22px 21px; margin: 0; color: var(--muted); font-size: 14px; }
    .case-mark { height: 7px; margin-top: 17px; background: linear-gradient(90deg, var(--blue), #9b69ef, var(--pink)); }
    .comparison-wrap { overflow-x: auto; border: 1px solid var(--line); background: white; }
    table { width: 100%; min-width: 720px; border-collapse: collapse; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { background: #eff1ff; color: #303b57; font-size: 13px; }
    td { color: #4a556b; font-size: 14px; }
    tr:last-child td { border-bottom: 0; }
    .rating { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; margin-bottom: 20px; }
    .rating strong { font-size: 30px; color: var(--blue); }
    .stars { color: #e2a300; letter-spacing: 2px; font-size: 20px; }
    .rating span { color: var(--muted); }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { padding: 19px; background: #fff; border-left: 3px solid var(--pink); }
    .review p { margin: 0 0 14px; color: #46516a; font-size: 14px; }
    .review strong { font-size: 13px; }
    .review small { display: block; color: var(--muted); }
    .match-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 40px; align-items: start; }
    .match-list { margin: 18px 0 0; padding-left: 19px; color: var(--muted); }
    .match-list li { margin: 8px 0; }
    .form-panel { padding: 25px; background: white; border: 1px solid var(--line); }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field-wide { grid-column: 1 / -1; }
    .field label { color: #3c475e; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; padding: 11px 12px; color: var(--ink); background: #fbfcff; border: 1px solid #d9deea; border-radius: 4px; outline: none; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(54,86,232,.1); }
    .field textarea { min-height: 112px; resize: vertical; }
    .form-submit { margin-top: 16px; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-list details { border-bottom: 1px solid var(--line); }
    .faq-list summary { position: relative; padding: 16px 36px 16px 0; cursor: pointer; font-weight: 700; list-style: none; }
    .faq-list summary::-webkit-details-marker { display: none; }
    .faq-list summary::after { content: "+"; position: absolute; right: 5px; top: 11px; color: var(--blue); font-size: 23px; font-weight: 400; }
    .faq-list details[open] summary::after { content: "−"; }
    .faq-list details p { margin: 0; padding: 0 34px 16px 0; color: var(--muted); font-size: 14px; }
    .articles { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
    .article-link { min-height: 112px; display: flex; flex-direction: column; justify-content: space-between; padding: 15px; background: white; border: 1px solid var(--line); color: var(--ink); text-decoration: none; font-size: 14px; }
    .article-link span:last-child { color: var(--blue); font-size: 12px; }
    .article-link:hover { border-color: var(--blue); }
    .image-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .image-frame { overflow: hidden; background: #e8ebf3; border: 1px solid var(--line); }
    .ai-page-image { display: block; width: 100%; height: auto; }
    .contact-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin-top: 25px; padding-top: 22px; border-top: 1px solid var(--line); }
    .contact-strip strong { display: block; font-size: 13px; }
    .contact-strip a, .contact-strip span { color: var(--muted); font-size: 14px; text-decoration: none; }
    .qr-row { display: flex; align-items: center; gap: 16px; margin-top: 22px; }
    .qr-row img { display: block; width: 112px; height: auto; border: 1px solid var(--line); background: white; }
    .footer { padding: 30px 0; background: #edf0f7; color: #2b354b; border-top: 1px solid #dce1eb; }
    .footer-row { display: flex; align-items: flex-start; justify-content: space-between; gap: 30px; }
    .footer p { margin: 6px 0; color: #566177; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; max-width: 640px; }
    .footer-links a { color: #43506a; font-size: 13px; text-decoration: none; }
    .footer-links a:hover { color: var(--blue); }
    .back-top { position: fixed; right: 18px; bottom: 18px; z-index: 10; display: none; width: 44px; height: 44px; border: 0; border-radius: 50%; color: white; background: var(--ink); cursor: pointer; }
    .back-top.visible { display: block; }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.in-view { opacity: 1; transform: none; }
    @keyframes orbit { to { transform: rotate(360deg); } }
    @media (max-width: 980px) {
      .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; padding: 12px 20px 18px; background: white; border-bottom: 1px solid var(--line); }
      .nav-links.open { display: grid; grid-template-columns: repeat(3, 1fr); }
      .nav-links a { padding: 10px; }
      .menu-toggle { display: inline-flex; }
      .nav-wrap { gap: 10px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .articles { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 680px) {
      .container { width: min(var(--container), calc(100% - 30px)); }
      .header-row { min-height: 64px; gap: 10px; }
      .brand { font-size: 14px; }
      .ai-page-logo { width: 32px; }
      .nav-links { top: 64px; grid-template-columns: repeat(2, 1fr) !important; max-height: calc(100vh - 70px); overflow: auto; }
      .header-cta { min-height: 39px; padding: 8px 11px; font-size: 12px; }
      .hero { padding: 56px 0 42px; }
      .hero::before { width: 240px; height: 240px; right: -115px; top: 45px; }
      .hero p { font-size: 16px; }
      .hero-edge { margin-top: 36px; }
      .metrics { grid-template-columns: 1fr 1fr; }
      .metric { padding: 16px; border-bottom: 1px solid var(--line); }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(n+3) { border-bottom: 0; }
      .section { padding: 54px 0; }
      .intro-layout, .solution-row, .match-grid { grid-template-columns: 1fr; gap: 24px; }
      .feature-list { gap: 8px 14px; }
      .service-grid, .case-grid, .reviews { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; gap: 10px 18px; }
      .solution-list { columns: 1; }
      .articles { grid-template-columns: 1fr 1fr; }
      .image-grid { grid-template-columns: 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .field-wide { grid-column: auto; }
      .contact-strip { grid-template-columns: 1fr; gap: 12px; }
      .footer-row { flex-direction: column; gap: 18px; }
      .rating { gap: 8px 13px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }