:root {
      color-scheme: light;
      --ink: #211d34;
      --muted: #666277;
      --purple: #6743d6;
      --violet: #8a61ee;
      --line: #e7e3f2;
      --paper: #ffffff;
      --wash: #f7f6ff;
      --mint: #d9f4e9;
      --coral: #ffd9ce;
      --max: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: linear-gradient(180deg, #f7f6ff 0, #fff 30rem, #f8f7fc 100%);
      font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; }
    button, input, select, textarea { font: inherit; }
    img { max-width: 100%; height: auto; }
    .container { width: min(var(--max), calc(100% - 40px)); margin-inline: auto; }
    .site-header { position: sticky; top: 0; z-index: 20; border-bottom: 1px solid rgba(231,227,242,.85); background: rgba(255,255,255,.94); backdrop-filter: blur(14px); }
    .nav { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { width: 38px; height: 38px; object-fit: contain; }
    .nav-right { display: flex; align-items: center; gap: 20px; }
    .nav-links { display: flex; align-items: center; gap: 0; list-style: none; padding: 0; margin: 0; }
    .nav-links a { display: block; padding: 10px 11px; color: #514d62; text-decoration: none; font-size: 14px; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover { color: var(--purple); }
    .menu-toggle { display: none; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 6px; padding: 8px 11px; cursor: pointer; }
    .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 46px; padding: 0 19px; border: 1px solid transparent; border-radius: 6px; background: var(--purple); color: #fff; text-decoration: none; font-weight: 700; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
    .button:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(103,67,214,.22); background: #5633c3; }
    .button.secondary { background: #fff; border-color: #d8d1ef; color: var(--purple); }
    .button.secondary:hover { background: #f4f0ff; }
    .hero { padding: 76px 0 52px; overflow: hidden; }
    .hero-grid { display: grid; grid-template-columns: minmax(0,1.15fr) minmax(300px,.85fr); gap: 48px; align-items: center; }
    .eyebrow { color: var(--purple); font-size: 13px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
    h1, h2, h3, p { margin-top: 0; }
    h1 { max-width: 680px; margin: 12px 0 16px; font-size: clamp(40px, 5vw, 64px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 610px; color: var(--muted); font-size: 18px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 26px 0 20px; }
    .hero-note { color: var(--muted); font-size: 13px; }
    .hero-visual { position: relative; min-height: 330px; display: grid; align-content: center; padding: 28px; border: 1px solid #e5defa; border-radius: 10px; background: linear-gradient(145deg,#f1edff,#fff 62%,#e8f7f0); box-shadow: 0 22px 60px rgba(71,54,132,.10); }
    .hero-visual::before { content: ""; position: absolute; inset: 18px; border: 1px solid rgba(103,67,214,.12); border-radius: 6px; pointer-events: none; }
    .visual-top { display: flex; justify-content: space-between; align-items: center; gap: 10px; color: #625b78; font-size: 13px; }
    .status-dot { width: 9px; height: 9px; display: inline-block; border-radius: 50%; background: #43b885; box-shadow: 0 0 0 5px rgba(67,184,133,.13); }
    .visual-title { margin: 26px 0 7px; font-size: 25px; line-height: 1.25; }
    .visual-copy { color: var(--muted); font-size: 14px; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
    .model-cloud span { padding: 6px 10px; border: 1px solid #e4def4; border-radius: 4px; background: rgba(255,255,255,.85); color: #4d4662; font-size: 12px; }
    .metric-strip { display: grid; grid-template-columns: repeat(4,1fr); gap: 1px; margin-top: 48px; border: 1px solid var(--line); background: var(--line); }
    .metric { padding: 19px 16px; background: #fff; }
    .metric strong { display: block; color: var(--purple); font-size: 21px; }
    .metric span { color: var(--muted); font-size: 13px; }
    .section { padding: 72px 0; }
    .section-tint { background: linear-gradient(110deg,#f7f5ff,#f4faf7); border-top: 1px solid #efedf6; border-bottom: 1px solid #efedf6; }
    .section-head { max-width: 720px; margin-bottom: 30px; }
    .section-head h2 { margin: 7px 0 10px; font-size: clamp(28px,3vw,38px); line-height: 1.25; }
    .section-head p { margin-bottom: 0; color: var(--muted); }
    .intro-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 42px; align-items: start; }
    .intro-copy { color: var(--muted); }
    .intro-copy p:last-child { margin-bottom: 0; }
    .capability-list { display: grid; grid-template-columns: repeat(2,1fr); gap: 0 24px; border-top: 1px solid var(--line); }
    .capability { display: flex; gap: 12px; padding: 16px 0; border-bottom: 1px solid var(--line); }
    .capability-mark { flex: 0 0 28px; color: var(--purple); font-weight: 800; }
    .capability strong { display: block; margin-bottom: 3px; }
    .capability span { color: var(--muted); font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .service { padding: 21px; border: 1px solid var(--line); border-radius: 6px; background: #fff; transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
    .service:hover { transform: translateY(-4px); border-color: #cfc3f2; box-shadow: 0 12px 28px rgba(47,35,87,.08); }
    .service-label { color: var(--purple); font-size: 12px; font-weight: 800; }
    .service h3 { margin: 8px 0; font-size: 18px; }
    .service p { margin: 0; color: var(--muted); font-size: 14px; }
    .workflow { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; counter-reset: steps; border-top: 1px solid var(--line); }
    .step { position: relative; padding: 22px 22px 10px 0; counter-increment: steps; }
    .step::before { content: "0" counter(steps); display: block; margin-bottom: 12px; color: var(--purple); font-weight: 800; font-size: 13px; }
    .step:not(:last-child)::after { content: ""; position: absolute; top: 31px; left: 40px; right: 20px; height: 1px; background: #d9d3e8; }
    .step h3 { margin-bottom: 6px; font-size: 16px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }
    .industry-row { display: flex; flex-wrap: wrap; gap: 9px; }
    .industry-row span { padding: 8px 12px; border: 1px solid #ded8ef; border-radius: 4px; background: #fff; color: #514b65; font-size: 14px; }
    .network { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: center; }
    .network h2 { margin: 8px 0 12px; font-size: 32px; line-height: 1.25; }
    .network p { color: var(--muted); }
    .network-links { display: flex; flex-wrap: wrap; gap: 10px; }
    .network-links a { color: var(--purple); text-decoration-thickness: 1px; text-underline-offset: 3px; }
    .media-row { display: grid; grid-template-columns: 1.35fr 1fr 1fr; gap: 14px; align-items: start; margin-top: 24px; }
    .media-frame { margin: 0; overflow: hidden; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
    .media-frame img { display: block; width: 100%; height: auto; object-fit: contain; }
    .media-frame figcaption { padding: 10px 12px; color: var(--muted); font-size: 13px; }
    .review-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .review { padding: 21px; border-top: 3px solid #8a61ee; background: #fff; box-shadow: 0 7px 20px rgba(40,30,70,.05); }
    .review p { margin-bottom: 17px; color: #4f4b5c; font-size: 14px; }
    .review strong { display: block; font-size: 14px; }
    .review span { color: var(--muted); font-size: 12px; }
    .rating-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 28px; align-items: stretch; }
    .rating-box { padding: 28px; background: #281e47; color: #fff; }
    .rating-box strong { display: block; margin: 8px 0; font-size: 48px; line-height: 1; }
    .stars { color: #ffd56a; letter-spacing: 0; font-size: 22px; }
    .rating-box p { margin: 7px 0 0; color: #e2dcf3; font-size: 14px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; min-width: 640px; border-collapse: collapse; text-align: left; }
    th, td { padding: 13px 15px; border-bottom: 1px solid var(--line); vertical-align: top; font-size: 14px; }
    th { background: #f2effb; color: #392b67; font-weight: 800; }
    td { color: #514d5f; }
    tbody tr:last-child td { border-bottom: 0; }
    .articles { display: grid; grid-template-columns: repeat(5,1fr); gap: 10px; }
    .article-link { display: flex; min-height: 92px; align-items: flex-end; padding: 14px; border: 1px solid var(--line); background: #fff; color: var(--ink); text-decoration: none; font-weight: 700; transition: border-color .2s ease, transform .2s ease; }
    .article-link:hover { transform: translateY(-3px); border-color: var(--purple); }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 17px 34px 17px 0; cursor: pointer; list-style: none; font-weight: 700; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 4px; top: 13px; color: var(--purple); font-size: 23px; font-weight: 400; }
    details[open] summary::after { content: "−"; }
    details p { max-width: 820px; margin: 0; padding: 0 34px 17px 0; color: var(--muted); font-size: 14px; }
    .contact-grid { display: grid; grid-template-columns: 1fr .76fr; gap: 40px; align-items: start; }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    label { color: #494458; font-size: 13px; font-weight: 700; }
    input, select, textarea { width: 100%; border: 1px solid #dcd8e7; border-radius: 4px; padding: 11px 12px; background: #fff; color: var(--ink); }
    input:focus, select:focus, textarea:focus { outline: 2px solid rgba(103,67,214,.2); border-color: var(--purple); }
    textarea { min-height: 118px; resize: vertical; }
    .contact-info { padding-left: 26px; border-left: 1px solid var(--line); }
    .contact-info h3 { margin-bottom: 12px; }
    .contact-info p { margin-bottom: 8px; color: var(--muted); }
    .contact-info a { color: var(--purple); }
    .qr { width: 160px; margin-top: 14px; border: 1px solid var(--line); padding: 7px; background: #fff; }
    .links-cloud { display: flex; flex-wrap: wrap; gap: 10px 18px; }
    .links-cloud a { color: #514b65; font-size: 14px; text-decoration: none; }
    .links-cloud a:hover { color: var(--purple); text-decoration: underline; }
    .site-footer { padding: 25px 0; border-top: 1px solid var(--line); background: #f1eff8; color: #494458; }
    .footer-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
    .footer-row p { margin: 0; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; }
    .footer-links a { color: #494458; font-size: 13px; text-decoration: none; }
    .float-contact { position: fixed; right: 16px; bottom: 18px; z-index: 15; box-shadow: 0 8px 22px rgba(50,35,95,.2); }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
    .reveal.is-visible { opacity: 1; transform: none; }
    @media (prefers-reduced-motion: reduce) {
      html { scroll-behavior: auto; }
      *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }
    @media (max-width: 980px) {
      .nav-right { gap: 8px; }
      .nav-links a { padding-inline: 7px; font-size: 13px; }
      .hero-grid { gap: 26px; }
      .service-grid { grid-template-columns: repeat(2,1fr); }
      .articles { grid-template-columns: repeat(3,1fr); }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--max), calc(100% - 32px)); }
      .nav { min-height: 66px; }
      .menu-toggle { display: inline-block; }
      .nav-right { gap: 10px; }
      .nav-links { display: none; position: absolute; top: 65px; left: 0; right: 0; padding: 9px 16px 14px; border-bottom: 1px solid var(--line); background: #fff; align-items: stretch; flex-direction: column; }
      .nav-links.is-open { display: flex; }
      .nav-links a { padding: 9px 8px; font-size: 14px; }
      .nav-cta { min-height: 40px; padding-inline: 12px; font-size: 13px; }
      .hero { padding: 52px 0 38px; }
      .hero-grid, .intro-grid, .network, .rating-layout, .contact-grid { grid-template-columns: 1fr; }
      .hero-visual { min-height: 270px; }
      .metric-strip { grid-template-columns: repeat(2,1fr); margin-top: 32px; }
      .section { padding: 54px 0; }
      .workflow { grid-template-columns: repeat(2,1fr); }
      .step:not(:last-child)::after { display: none; }
      .review-grid { grid-template-columns: repeat(2,1fr); }
      .contact-info { padding: 24px 0 0; border-left: 0; border-top: 1px solid var(--line); }
    }
    @media (max-width: 520px) {
      .brand { gap: 7px; font-size: 14px; }
      .ai-page-logo { width: 32px; height: 32px; }
      .hero-copy { font-size: 16px; }
      .service-grid, .capability-list, .review-grid, .workflow, .articles, .media-row { grid-template-columns: 1fr; }
      .service { padding: 18px; }
      .step { padding-right: 0; }
      .form-grid { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .footer-row { align-items: flex-start; flex-direction: column; }
      .float-contact { right: 12px; bottom: 12px; }
      .float-contact .button { min-height: 42px; padding-inline: 13px; }
    }