:root {
      color-scheme: light;
      --ink: #172033;
      --muted: #5b6476;
      --line: #dfe4ef;
      --paper: #f7f8fc;
      --white: #fff;
      --violet: #6b48ef;
      --cyan: #00a9c7;
      --lime: #c7f25a;
      --pink: #ef5ca8;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 82px; }
    body {
      margin: 0;
      color: var(--ink);
      background:
        radial-gradient(ellipse at 90% 5%, rgba(199,242,90,.15), transparent 24rem),
        radial-gradient(ellipse at 5% 18%, rgba(0,169,199,.08), transparent 28rem),
        var(--paper);
      font-family: Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    button, a { -webkit-tap-highlight-color: transparent; }
    img { max-width: 100%; height: auto; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header { position: sticky; z-index: 20; top: 0; background: rgba(255,255,255,.94); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); }
    .header-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; font-weight: 800; }
    .ai-page-logo { display: block; width: 38px; max-width: 100%; height: auto; }
    .brand-name { font-size: 17px; letter-spacing: 0; }
    .nav-wrap { display: flex; align-items: center; gap: 18px; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; }
    .nav-links a { padding: 9px 10px; color: #465064; font-size: 13px; white-space: nowrap; border-radius: 6px; }
    .nav-links a:hover, .nav-links a:focus-visible { color: var(--violet); background: #f1efff; }
    .header-actions { display: flex; align-items: center; gap: 9px; }
    .menu-toggle { display: none; width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 7px; background: var(--white); color: var(--ink); cursor: pointer; }
    .button { display: inline-flex; justify-content: center; align-items: center; gap: 8px; min-height: 45px; padding: 0 18px; border: 1px solid transparent; border-radius: 6px; font-weight: 700; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; cursor: pointer; }
    .button:hover { transform: translateY(-2px); }
    .button-primary { color: #fff; background: var(--violet); box-shadow: 0 8px 20px rgba(107,72,239,.22); }
    .button-primary:hover { background: #5737d5; box-shadow: 0 10px 24px rgba(107,72,239,.3); }
    .button-light { color: var(--ink); background: #fff; border-color: var(--line); }
    .button-dark { color: #fff; background: var(--ink); }
    .button-small { min-height: 39px; padding-inline: 13px; font-size: 13px; }
    .hero { overflow: hidden; position: relative; padding: 76px 0 52px; border-bottom: 1px solid var(--line); }
    .hero:before { position: absolute; content: ""; width: 430px; height: 430px; right: -110px; top: -185px; border: 1px solid rgba(107,72,239,.13); border-radius: 50%; box-shadow: 0 0 0 28px rgba(0,169,199,.035), 0 0 0 58px rgba(239,92,168,.025); pointer-events: none; }
    .hero-grid { position: relative; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(270px, .75fr); gap: 54px; align-items: center; }
    .eyebrow { display: inline-flex; gap: 9px; align-items: center; margin: 0 0 18px; color: #5440b5; font-size: 13px; font-weight: 800; letter-spacing: 0; }
    .eyebrow:before { width: 22px; height: 3px; content: ""; background: var(--lime); }
    h1, h2, h3, p { margin-top: 0; }
    h1 { max-width: 680px; margin-bottom: 18px; font-size: clamp(38px, 5vw, 64px); line-height: 1.08; letter-spacing: 0; }
    h1 span { color: var(--violet); }
    .hero-copy { max-width: 650px; margin-bottom: 24px; color: var(--muted); font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 11px; }
    .hero-note { margin: 17px 0 0; color: #697286; font-size: 12px; }
    .hero-panel { position: relative; padding: 24px; border: 1px solid #d9d4fc; border-radius: 8px; background: rgba(255,255,255,.88); box-shadow: 12px 12px 0 rgba(199,242,90,.38); animation: rise-in .7s ease both; }
    .panel-top { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding-bottom: 15px; border-bottom: 1px solid var(--line); }
    .panel-top strong { font-size: 15px; }
    .live-mark { width: 9px; height: 9px; border-radius: 50%; background: #76b51c; box-shadow: 0 0 0 5px rgba(118,181,28,.13); }
    .model-tiles { display: grid; grid-template-columns: repeat(3, 1fr); gap: 9px; padding-top: 16px; }
    .model-tiles span { display: grid; min-height: 50px; place-items: center; border: 1px solid #e6e8f0; border-radius: 5px; background: #fafbff; color: #394258; font-size: 12px; font-weight: 700; }
    .panel-foot { margin: 17px 0 0; color: var(--muted); font-size: 12px; }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; padding: 24px 0; }
    .metric { padding: 8px 22px; border-left: 2px solid var(--lime); }
    .metric strong { display: block; font-size: 19px; line-height: 1.3; }
    .metric span { color: var(--muted); font-size: 12px; }
    main section { padding: 72px 0; }
    .section-head { display: flex; justify-content: space-between; align-items: end; gap: 28px; margin-bottom: 28px; }
    .section-head > div { max-width: 720px; }
    .section-kicker { margin: 0 0 8px; color: #6753ca; font-size: 12px; font-weight: 800; }
    h2 { margin-bottom: 9px; font-size: 32px; line-height: 1.2; letter-spacing: 0; }
    .section-intro { margin-bottom: 0; color: var(--muted); max-width: 720px; }
    .about-band { background: #fff; border-block: 1px solid var(--line); }
    .about-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 54px; align-items: start; }
    .about-layout h2 { max-width: 420px; }
    .about-copy { color: var(--muted); }
    .about-copy p:last-child { margin-bottom: 0; }
    .capability-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 24px; margin: 0; padding: 0; list-style: none; }
    .capability-list li { padding: 13px 0; border-bottom: 1px solid var(--line); color: #364056; font-size: 14px; }
    .capability-list strong { color: var(--ink); }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .service-item { min-height: 152px; padding: 19px; border: 1px solid var(--line); border-radius: 6px; background: #fff; transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
    .service-item:hover { transform: translateY(-3px); border-color: #b8aaf9; box-shadow: 0 12px 24px rgba(30,39,71,.07); }
    .service-item h3 { margin-bottom: 8px; font-size: 16px; }
    .service-item p { margin-bottom: 0; color: var(--muted); font-size: 13px; }
    .service-item .mini-label { display: inline-block; margin-bottom: 11px; color: #6550c5; font-size: 11px; font-weight: 800; }
    .service-more { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
    .tag { padding: 7px 10px; border: 1px solid #dfe2ed; border-radius: 4px; background: #fff; color: #49536a; font-size: 12px; }
    .workflow-section { color: #fff; background: #202238; }
    .workflow-section .section-kicker { color: var(--lime); }
    .workflow-section .section-intro { color: #c7cad8; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: steps; }
    .workflow-step { position: relative; padding: 20px 22px 18px 0; border-top: 1px solid #515369; counter-increment: steps; }
    .workflow-step:before { display: block; margin-bottom: 18px; color: var(--lime); content: "0" counter(steps); font-size: 14px; font-weight: 800; }
    .workflow-step:not(:last-child):after { position: absolute; top: -4px; right: 16px; width: 7px; height: 7px; content: ""; background: var(--pink); transform: rotate(45deg); }
    .workflow-step h3 { margin-bottom: 7px; font-size: 16px; }
    .workflow-step p { margin: 0; color: #c7cad8; font-size: 13px; }
    .solutions-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 26px 48px; }
    .solution { padding-top: 17px; border-top: 2px solid #c8f35b; }
    .solution:nth-child(2n) { border-color: #4bc7d9; }
    .solution h3 { margin-bottom: 7px; font-size: 17px; }
    .solution p { margin-bottom: 0; color: var(--muted); font-size: 14px; }
    .network-band { background: linear-gradient(100deg, #eeedff, #e3f8fa 58%, #f5fae8); border-block: 1px solid #dcdff0; }
    .network-content { display: grid; grid-template-columns: .75fr 1.25fr; gap: 48px; align-items: center; }
    .network-content h2 { margin-bottom: 12px; }
    .network-content p { margin-bottom: 0; color: #4f596d; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-cloud span { padding: 8px 11px; border: 1px solid rgba(60,73,111,.15); border-radius: 4px; background: rgba(255,255,255,.8); color: #334057; font-size: 12px; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .case { overflow: hidden; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
    .case .case-bar { height: 8px; background: linear-gradient(90deg, var(--violet), var(--cyan), var(--lime)); }
    .case-body { padding: 19px; }
    .case-body small { color: #6350c3; font-weight: 800; }
    .case-body h3 { margin: 8px 0; font-size: 17px; }
    .case-body p { margin: 0; color: var(--muted); font-size: 13px; }
    .compare-layout { display: grid; grid-template-columns: .68fr 1.32fr; gap: 34px; align-items: start; }
    .rating-box { padding: 24px; border-radius: 7px; color: #fff; background: #262840; }
    .rating-box .rating-label { color: #dbdcee; font-size: 13px; }
    .rating-score { display: flex; align-items: baseline; gap: 7px; margin: 10px 0; }
    .rating-score strong { color: var(--lime); font-size: 52px; line-height: 1; }
    .rating-score span { color: #d9d9e5; }
    .stars { color: #d8f064; font-size: 20px; letter-spacing: 0; }
    .rating-box p { margin: 13px 0 0; color: #d2d4df; font-size: 13px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
    table { width: 100%; border-collapse: collapse; text-align: left; }
    th, td { padding: 13px 14px; border-bottom: 1px solid #e8eaf1; font-size: 13px; vertical-align: top; }
    th { background: #f0efff; color: #29244a; font-weight: 800; }
    tr:last-child td { border-bottom: 0; }
    td:first-child { color: var(--ink); font-weight: 700; }
    td:not(:first-child) { color: #586176; }
    .price-note { margin: 12px 0 0; color: var(--muted); font-size: 12px; }
    .form-section { background: #fff; border-block: 1px solid var(--line); }
    .form-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 50px; align-items: start; }
    .form-aside p { color: var(--muted); }
    .contact-list { margin: 22px 0 0; padding: 0; list-style: none; }
    .contact-list li { padding: 9px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
    .contact-list strong { display: inline-block; min-width: 88px; }
    .request-form { display: grid; grid-template-columns: repeat(2, 1fr); gap: 15px; }
    .field { display: grid; gap: 6px; }
    .field-full { grid-column: 1 / -1; }
    .field label { color: #384257; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid #d9deea; border-radius: 5px; background: #fcfcfe; color: var(--ink); outline: none; }
    .field textarea { min-height: 116px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--violet); box-shadow: 0 0 0 3px rgba(107,72,239,.1); }
    .form-submit { grid-column: 1 / -1; display: flex; align-items: center; gap: 14px; }
    .form-submit small { color: var(--muted); font-size: 11px; }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { padding: 18px; border-left: 3px solid var(--cyan); background: #fff; }
    .review:nth-child(3n+2) { border-color: var(--pink); }
    .review:nth-child(3n) { border-color: var(--lime); }
    .review p { margin: 0 0 14px; color: #4f596d; font-size: 13px; }
    .review strong { font-size: 13px; }
    .review span { display: block; color: #788095; font-size: 11px; }
    .articles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 30px; border-top: 1px solid var(--line); }
    .article-link { display: flex; justify-content: space-between; align-items: center; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--line); }
    .article-link strong { display: block; font-size: 14px; }
    .article-link small { display: block; color: var(--muted); font-size: 12px; }
    .article-link b { color: var(--violet); font-size: 18px; font-weight: 400; }
    .faq-list { max-width: 900px; border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); background: rgba(255,255,255,.58); }
    summary { position: relative; padding: 17px 42px 17px 14px; cursor: pointer; font-size: 14px; font-weight: 700; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary:after { position: absolute; right: 15px; top: 50%; content: "+"; color: var(--violet); font-size: 22px; transform: translateY(-50%); }
    details[open] summary:after { content: "−"; }
    details p { padding: 0 42px 16px 14px; margin: 0; color: var(--muted); font-size: 13px; }
    .join-band { padding: 35px 0; background: #eaf6d6; border-block: 1px solid #d9e9b9; }
    .join-content { display: flex; justify-content: space-between; align-items: center; gap: 25px; }
    .join-content h2 { margin-bottom: 5px; font-size: 24px; }
    .join-content p { margin: 0; color: #4e5b47; }
    .footer { padding: 38px 0 22px; color: #364056; background: #eef0f6; }
    .footer-main { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 32px; padding-bottom: 25px; }
    .footer h3 { margin-bottom: 11px; font-size: 14px; }
    .footer p, .footer a { color: #515b70; font-size: 12px; }
    .footer p { margin-bottom: 8px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 7px 13px; }
    .footer-links a:hover { color: var(--violet); }
    .footer-bottom { display: flex; justify-content: space-between; gap: 15px; padding-top: 17px; border-top: 1px solid #d8dce7; color: #596276; font-size: 11px; }
    .qr-image { display: block; width: 108px; margin-top: 9px; border: 1px solid #dce1ec; border-radius: 4px; }
    .floating-contact { position: fixed; z-index: 18; right: 18px; bottom: 20px; display: flex; flex-direction: column; gap: 8px; }
    .floating-contact a { display: grid; min-width: 48px; min-height: 46px; padding: 0 12px; place-items: center; border: 1px solid #ded9fa; border-radius: 5px; color: #3d3185; background: #fff; box-shadow: 0 6px 18px rgba(31,37,65,.12); font-size: 12px; font-weight: 800; }
    .floating-contact a:hover { color: #fff; background: var(--violet); }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: translateY(0); }
    @keyframes rise-in { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
    @media (prefers-reduced-motion: reduce) {
      *, *:before, *:after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }
    @media (max-width: 1000px) {
      .nav-links { display: none; position: absolute; top: 71px; left: 0; right: 0; padding: 12px 20px 16px; border-bottom: 1px solid var(--line); background: #fff; flex-wrap: wrap; justify-content: flex-start; }
      .nav-links.is-open { display: flex; }
      .nav-wrap { gap: 10px; }
      .menu-toggle { display: inline-grid; place-items: center; }
      .header-actions .button { display: none; }
      .hero-grid { gap: 30px; }
    }
    @media (max-width: 720px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .header-inner { min-height: 64px; }
      .brand-name { font-size: 15px; }
      .ai-page-logo { width: 33px; }
      .nav-links { top: 63px; }
      .hero { padding: 55px 0 28px; }
      .hero-grid, .about-layout, .network-content, .compare-layout, .form-layout { grid-template-columns: 1fr; gap: 28px; }
      h1 { font-size: 43px; }
      .hero-copy { font-size: 15px; }
      .hero-panel { max-width: 480px; }
      .metrics { grid-template-columns: repeat(2, 1fr); gap: 14px 0; }
      main section { padding: 54px 0; }
      .section-head { align-items: start; flex-direction: column; gap: 14px; }
      h2 { font-size: 28px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .service-item { min-height: 0; padding: 15px; }
      .workflow { grid-template-columns: repeat(2, 1fr); gap: 10px 18px; }
      .workflow-step:not(:last-child):after { display: none; }
      .case-grid, .review-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-main { grid-template-columns: repeat(2, 1fr); }
      .footer-main > div:first-child { grid-column: 1 / -1; }
    }
    @media (max-width: 480px) {
      .hero-actions .button { width: 100%; }
      .metrics { padding: 18px 0; }
      .metric { padding-inline: 12px; }
      .service-grid, .solutions-grid, .case-grid, .review-grid, .articles, .request-form, .footer-main { grid-template-columns: 1fr; }
      .field-full, .form-submit, .footer-main > div:first-child { grid-column: auto; }
      .workflow { grid-template-columns: 1fr 1fr; }
      .model-tiles { grid-template-columns: repeat(2, 1fr); }
      .join-content { align-items: start; flex-direction: column; }
      .footer-bottom { flex-direction: column; }
      .floating-contact { right: 10px; bottom: 12px; }
      .floating-contact a { min-width: 43px; min-height: 42px; padding-inline: 8px; }
    }