:root {
      color-scheme: light;
      --ink: #172033;
      --muted: #596579;
      --line: #dfe4ee;
      --paper: #f7f8fc;
      --white: #fff;
      --blue: #3157db;
      --teal: #087d85;
      --pink: #b52f78;
      --lime: #b8d84a;
      --shadow: 0 16px 44px rgba(34, 48, 86, .09);
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    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; }
    .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,.94); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
    .nav-row { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; flex: 0 0 auto; }
    .ai-page-logo { width: 126px; max-width: 100%; height: auto; display: block; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { color: #354057; text-decoration: none; font-size: 13px; padding: 8px 9px; border-radius: 4px; transition: color .2s, background .2s; }
    .nav-links a:hover { color: var(--blue); background: #eef1ff; }
    .nav-cta, .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 0 18px; border: 1px solid transparent; border-radius: 5px; background: var(--blue); color: #fff; text-decoration: none; font-weight: 700; transition: transform .2s, box-shadow .2s, background .2s; }
    .nav-cta:hover, .button:hover { transform: translateY(-2px); box-shadow: 0 8px 18px rgba(49,87,219,.22); background: #2448c4; }
    .button.secondary { color: var(--ink); background: #fff; border-color: #cbd2e2; }
    .button.secondary:hover { color: var(--blue); background: #f3f5ff; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 5px; color: var(--ink); background: #fff; cursor: pointer; }
    .hero { overflow: hidden; position: relative; padding: 76px 0 48px; background: linear-gradient(120deg, #eef2ff 0%, #fbf8ff 48%, #e9f8f5 100%); border-bottom: 1px solid #e4e7f0; }
    .hero::before, .hero::after { content: ""; position: absolute; pointer-events: none; border: 1px solid rgba(49,87,219,.15); transform: rotate(-18deg); }
    .hero::before { width: 520px; height: 180px; right: -130px; top: 80px; border-radius: 50%; box-shadow: 0 0 0 20px rgba(181,47,120,.04), 0 0 0 42px rgba(8,125,133,.035); }
    .hero::after { width: 320px; height: 100px; right: 4%; top: 124px; border-color: rgba(181,47,120,.2); border-radius: 50%; }
    .hero-inner { position: relative; z-index: 1; max-width: 790px; }
    .eyebrow { color: var(--teal); font-size: 12px; font-weight: 800; letter-spacing: 1.4px; text-transform: uppercase; }
    h1 { max-width: 720px; margin: 16px 0; font-size: clamp(38px, 6vw, 66px); line-height: 1.13; letter-spacing: 0; }
    .hero p { max-width: 670px; margin: 0; color: #45516a; font-size: 18px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
    .hero-proof { display: flex; flex-wrap: wrap; gap: 12px 26px; margin-top: 30px; color: #38455c; font-size: 13px; }
    .hero-proof span::before { content: "✦"; margin-right: 8px; color: var(--pink); }
    .metric-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 48px; border-top: 1px solid rgba(46,61,99,.18); }
    .metric { padding: 18px 16px 0 0; }
    .metric strong { display: block; font-size: 20px; }
    .metric span { color: var(--muted); font-size: 12px; }
    .section { padding: 66px 0; }
    .section-head { max-width: 720px; margin-bottom: 28px; }
    .section-head h2 { margin: 7px 0 10px; font-size: 32px; line-height: 1.25; letter-spacing: 0; }
    .section-head p { margin: 0; color: var(--muted); }
    .intro-band { background: #fff; border-bottom: 1px solid var(--line); }
    .intro-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px; align-items: start; }
    .intro-copy { color: #47536a; }
    .intro-copy strong { color: var(--ink); }
    .model-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
    .model-list span { padding: 5px 10px; color: #37435b; background: #f0f3fa; border: 1px solid #e1e6ef; border-radius: 3px; font-size: 12px; }
    .intro-aside { padding: 20px 0 20px 24px; border-left: 3px solid var(--teal); }
    .intro-aside h3 { margin: 0 0 8px; font-size: 18px; }
    .intro-aside p { margin: 0; color: var(--muted); font-size: 14px; }
    .capability-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .capability { padding: 20px; background: #fff; border: 1px solid var(--line); border-top: 3px solid var(--blue); transition: transform .2s, box-shadow .2s; }
    .capability:nth-child(3n+2) { border-top-color: var(--pink); }
    .capability:nth-child(3n) { border-top-color: var(--teal); }
    .capability:hover, .review:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
    .capability h3 { margin: 0 0 7px; font-size: 17px; }
    .capability p { margin: 0; color: var(--muted); font-size: 14px; }
    .text-link { display: inline-block; margin-top: 12px; color: var(--blue); font-size: 13px; font-weight: 700; text-decoration: none; }
    .workflow { background: #202c43; color: #fff; }
    .workflow .section-head p { color: #c4ccda; }
    .workflow .eyebrow { color: #a7dfe0; }
    .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: step; }
    .step { position: relative; padding: 18px 16px 18px 0; border-top: 1px solid #748097; counter-increment: step; }
    .step::before { content: "0" counter(step); display: block; margin-bottom: 12px; color: #b8d84a; font-size: 13px; font-weight: 800; }
    .step h3 { margin: 0 0 6px; font-size: 16px; }
    .step p { margin: 0; color: #c4ccda; font-size: 13px; }
    .solutions { background: #fff; }
    .solution-layout { display: grid; grid-template-columns: 1.1fr .9fr; gap: 30px; align-items: start; }
    .solution-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px 26px; }
    .solution-list article { padding: 13px 0; border-bottom: 1px solid var(--line); }
    .solution-list h3 { margin: 0 0 4px; font-size: 15px; }
    .solution-list p { margin: 0; color: var(--muted); font-size: 13px; }
    .media-stack { display: grid; gap: 14px; }
    .media-frame { overflow: hidden; background: #edf0f6; border: 1px solid var(--line); }
    .media-frame img { display: block; width: 100%; height: auto; object-fit: contain; }
    .media-caption { margin: 7px 0 0; color: var(--muted); font-size: 12px; }
    .benchmark { display: grid; grid-template-columns: .72fr 1.28fr; gap: 28px; align-items: start; }
    .score-panel { padding: 24px; color: #fff; background: linear-gradient(135deg, #3157db, #087d85); }
    .score-panel .score { margin: 4px 0; font-size: 56px; line-height: 1.1; font-weight: 800; }
    .score-panel p { margin: 8px 0 0; color: #edf4ff; }
    .stars { color: #ffe278; letter-spacing: 2px; font-size: 20px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; border-collapse: collapse; min-width: 630px; text-align: left; }
    th, td { padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; font-size: 13px; }
    th { background: #eff2f8; color: #28334a; font-weight: 800; }
    td { color: #4c586d; }
    tr:last-child td { border-bottom: 0; }
    .reviews { background: #edf1f8; }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { display: flex; flex-direction: column; padding: 18px; background: #fff; border: 1px solid #dfe4ee; transition: transform .2s, box-shadow .2s; }
    .review p { flex: 1; margin: 0 0 16px; color: #465268; font-size: 14px; }
    .review strong { font-size: 13px; }
    .review span { color: var(--muted); font-size: 12px; }
    .faq-list { max-width: 900px; border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { position: relative; padding: 17px 38px 17px 0; cursor: pointer; list-style: none; font-weight: 700; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; right: 8px; top: 12px; color: var(--blue); font-size: 24px; font-weight: 400; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { margin: 0; padding: 0 36px 17px 0; color: var(--muted); font-size: 14px; }
    .contact { color: #fff; background: #202c43; }
    .contact .section-head p { color: #c4ccda; }
    .contact .eyebrow { color: #a7dfe0; }
    .contact-grid { display: grid; grid-template-columns: .78fr 1.22fr; gap: 40px; align-items: start; }
    .contact-details { color: #d5dbe6; }
    .contact-details h3 { color: #fff; }
    .contact-details a { color: #c7d6ff; }
    .contact-details p { margin: 8px 0; }
    .contact-qr { width: min(190px, 100%); padding: 8px; background: #fff; }
    .contact-qr img { display: block; width: 100%; height: auto; }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { color: #e2e7f0; font-size: 13px; }
    .field input, .field select, .field textarea { width: 100%; padding: 11px 12px; border: 1px solid #667188; border-radius: 4px; outline: 0; color: #172033; background: #fff; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: #9eb3ff; box-shadow: 0 0 0 3px rgba(158,179,255,.2); }
    .field textarea { min-height: 112px; resize: vertical; }
    .form-note { color: #c4ccda; font-size: 12px; }
    .article-band { background: #fff; }
    .article-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
    .article-grid a { display: block; padding: 13px; border: 1px solid var(--line); background: #fafbfe; color: #38445b; text-decoration: none; font-size: 13px; transition: border-color .2s, color .2s; }
    .article-grid a:hover { border-color: var(--blue); color: var(--blue); }
    .footer { padding: 24px 0; color: #354057; background: #e9edf5; border-top: 1px solid #d7deea; }
    .footer-top { display: flex; justify-content: space-between; align-items: start; gap: 24px; }
    .footer p { margin: 5px 0; color: #596579; font-size: 12px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; justify-content: flex-end; }
    .footer-links a { color: #38445b; font-size: 12px; text-decoration: none; }
    .footer-links a:hover { color: var(--blue); }
    .floating-contact { position: fixed; right: 18px; bottom: 18px; z-index: 15; display: grid; gap: 8px; }
    .floating-contact a { display: grid; place-items: center; width: 48px; height: 48px; border: 1px solid #d8deeb; border-radius: 50%; color: var(--ink); background: #fff; box-shadow: 0 6px 20px rgba(25,38,70,.15); text-decoration: none; font-size: 12px; font-weight: 700; transition: transform .2s; }
    .floating-contact a:hover { transform: translateY(-3px); }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.visible { opacity: 1; transform: none; }
    @media (max-width: 980px) {
      .nav-row { flex-wrap: wrap; padding-block: 12px; }
      .menu-toggle { display: inline-grid; place-items: center; margin-left: auto; }
      .nav-cta { order: 2; }
      .nav-links { display: none; order: 3; width: 100%; justify-content: flex-start; padding-top: 8px; border-top: 1px solid var(--line); }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 8px 10px; }
      .intro-grid, .solution-layout, .benchmark, .contact-grid { grid-template-columns: 1fr; }
      .intro-aside { max-width: 620px; }
      .article-grid { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 680px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .hero { padding: 54px 0 35px; }
      .hero::before { right: -300px; }
      .hero::after { right: -180px; }
      .hero p { font-size: 16px; }
      .metric-strip { grid-template-columns: repeat(2, 1fr); row-gap: 12px; }
      .metric { padding-top: 14px; }
      .section { padding: 48px 0; }
      .section-head h2 { font-size: 27px; }
      .capability-grid, .review-grid { grid-template-columns: 1fr; }
      .steps { grid-template-columns: repeat(2, 1fr); }
      .solution-list { grid-template-columns: 1fr; }
      .article-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-top { flex-direction: column; }
      .footer-links { justify-content: flex-start; }
      .form-grid { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .nav-cta { min-height: 40px; padding-inline: 12px; font-size: 13px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }