:root {
      color-scheme: light;
      --ink: #202735;
      --muted: #606a78;
      --line: #e6e7ec;
      --paper: #fff9f5;
      --surface: #ffffff;
      --coral: #ec553f;
      --orange: #ff9b38;
      --blue: #356ce3;
      --teal: #159b91;
      --yellow: #ffda58;
      --shadow: 0 14px 40px rgba(38, 47, 70, .09);
      --wrap: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 86px; }
    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; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    button, a { -webkit-tap-highlight-color: transparent; }
    img { display: block; max-width: 100%; height: auto; }
    .container { width: min(var(--wrap), calc(100% - 40px)); margin-inline: auto; }
    .site-header { position: sticky; top: 0; z-index: 20; background: rgba(255, 249, 245, .96); border-bottom: 1px solid rgba(32,39,53,.09); backdrop-filter: blur(12px); }
    .nav-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .brand { flex: 0 0 auto; display: inline-flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 800; }
    .ai-page-logo { width: 38px; height: 38px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 0; }
    .nav-links a { padding: 8px 10px; color: #454d5b; font-size: 13px; }
    .nav-links a:hover { color: var(--coral); }
    .nav-actions { display: flex; align-items: center; gap: 9px; flex: 0 0 auto; }
    .menu-toggle { display: none; width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 8px; color: var(--ink); background: #fff; cursor: pointer; }
    .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 10px 17px; border: 1px solid transparent; border-radius: 7px; font-weight: 750; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; cursor: pointer; }
    .button:hover { transform: translateY(-2px); box-shadow: 0 9px 22px rgba(38,47,70,.15); }
    .button-primary { color: #fff; background: var(--coral); }
    .button-dark { color: #fff; background: var(--ink); }
    .button-outline { color: var(--ink); border-color: #ccd0d9; background: #fff; }
    .button-small { min-height: 38px; padding: 7px 12px; font-size: 13px; }
    .hero { position: relative; overflow: hidden; padding: 68px 0 56px; background: linear-gradient(118deg, #fff0df 0%, #fff7e8 46%, #edf4ff 100%); }
    .hero::before { position: absolute; top: -150px; right: -110px; width: 440px; height: 440px; content: ""; border: 1px solid rgba(236,85,63,.18); border-radius: 50%; box-shadow: 0 0 0 38px rgba(236,85,63,.035), 0 0 0 78px rgba(53,108,227,.035); }
    .hero-grid { position: relative; display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(270px, .8fr); align-items: center; gap: 42px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 8px; margin: 0 0 17px; color: #a43a2d; font-size: 13px; font-weight: 800; letter-spacing: .4px; }
    .eyebrow::before { width: 22px; height: 3px; content: ""; background: var(--coral); }
    h1, h2, h3, p { margin-top: 0; }
    h1 { max-width: 720px; margin-bottom: 18px; font-size: clamp(38px, 5vw, 66px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 660px; margin-bottom: 25px; color: #4c5665; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 11px; }
    .hero-note { margin: 17px 0 0; color: #697281; font-size: 13px; }
    .hero-panel { padding: 25px; border: 1px solid rgba(32,39,53,.1); border-radius: 12px; background: rgba(255,255,255,.84); box-shadow: var(--shadow); animation: rise-in .7s ease both; }
    .hero-panel h2 { margin-bottom: 17px; font-size: 18px; }
    .model-lines { display: grid; gap: 10px; }
    .model-line { display: flex; justify-content: space-between; gap: 12px; padding: 10px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
    .model-line:last-child { border-bottom: 0; }
    .model-line strong { color: var(--blue); }
    .hero-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 15px; }
    .tag { display: inline-flex; align-items: center; padding: 5px 9px; border-radius: 5px; color: #384559; background: #f0f3f8; font-size: 12px; }
    .metrics { padding: 19px 0; border-bottom: 1px solid var(--line); background: #fff; }
    .metric-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 15px; }
    .metric { padding: 9px 16px; border-left: 3px solid var(--coral); }
    .metric strong { display: block; font-size: 19px; line-height: 1.35; }
    .metric span { color: var(--muted); font-size: 12px; }
    .section { padding: 65px 0; }
    .section-alt { background: #fff; }
    .section-tint { background: #f2f6ff; }
    .section-head { max-width: 740px; margin-bottom: 29px; }
    .section-kicker { margin-bottom: 8px; color: var(--coral); font-size: 12px; font-weight: 850; letter-spacing: 1px; }
    .section-head h2 { margin-bottom: 10px; font-size: clamp(27px, 3vw, 38px); line-height: 1.2; }
    .section-head p { margin-bottom: 0; color: var(--muted); }
    .intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 35px; align-items: start; }
    .intro-copy { color: #4e5867; }
    .intro-copy p:last-child { margin-bottom: 0; }
    .feature-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
    .feature { padding: 15px; border-left: 3px solid var(--teal); background: #f1faf8; }
    .feature strong { display: block; margin-bottom: 3px; }
    .feature span { color: var(--muted); font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 13px; }
    .service-item { min-height: 156px; padding: 18px; border: 1px solid var(--line); border-radius: 8px; background: #fff; transition: transform .2s ease, box-shadow .2s ease; }
    .service-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
    .service-item .index { display: inline-block; margin-bottom: 9px; color: var(--coral); font-size: 12px; font-weight: 850; }
    .service-item h3 { margin-bottom: 7px; font-size: 16px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .tool-strip { display: flex; flex-wrap: wrap; gap: 8px; }
    .tool-strip span { padding: 7px 11px; border: 1px solid #dce2ee; border-radius: 5px; background: #fff; color: #465264; font-size: 13px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: steps; }
    .step { position: relative; padding: 17px 20px 17px 0; border-top: 2px solid #d9deea; counter-increment: steps; }
    .step::before { display: block; width: 31px; height: 31px; margin-top: -34px; margin-bottom: 15px; border-radius: 50%; color: #fff; background: var(--blue); content: counter(steps); text-align: center; line-height: 31px; font-size: 13px; font-weight: 800; }
    .step h3 { margin-bottom: 6px; font-size: 16px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }
    .solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
    .solution { padding: 19px; border-top: 4px solid var(--orange); background: #fff; }
    .solution:nth-child(2) { border-color: var(--blue); }
    .solution:nth-child(3) { border-color: var(--teal); }
    .solution h3 { margin-bottom: 7px; }
    .solution p { margin: 0; color: var(--muted); font-size: 14px; }
    .network-row { display: grid; grid-template-columns: 1fr 1fr; align-items: start; gap: 30px; }
    .network-copy { color: #515b69; }
    .network-points { display: grid; gap: 11px; margin: 0; padding: 0; list-style: none; }
    .network-points li { padding: 12px 14px; border: 1px solid var(--line); background: #fff; }
    .compare-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    .compare-table { width: 100%; min-width: 680px; border-collapse: collapse; }
    .compare-table th, .compare-table td { padding: 13px 15px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
    .compare-table thead th { color: #fff; background: var(--ink); font-size: 13px; }
    .compare-table tbody th { width: 23%; background: #f6f7fa; font-size: 14px; }
    .compare-table td { color: #4d5765; font-size: 13px; }
    .rating { display: flex; flex-wrap: wrap; align-items: center; gap: 17px; margin: 0 0 18px; padding: 17px 20px; color: #fff; background: var(--coral); }
    .rating strong { font-size: 28px; line-height: 1; }
    .rating span { font-size: 14px; }
    .rating .stars { color: var(--yellow); letter-spacing: 2px; }
    .price-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: center; }
    .price-grid p { margin-bottom: 0; color: var(--muted); }
    .price-callout { padding: 20px; border-left: 4px solid var(--orange); background: #fff4e5; }
    .price-callout strong { display: block; margin-bottom: 5px; }
    .cases { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
    .case { overflow: hidden; border: 1px solid var(--line); background: #fff; }
    .case .media { overflow: hidden; aspect-ratio: 16 / 9; background: #eef1f6; }
    .case .media img { width: 100%; height: 100%; object-fit: cover; }
    .case-body { padding: 15px; }
    .case-body h3 { margin-bottom: 6px; font-size: 16px; }
    .case-body p { margin: 0; color: var(--muted); font-size: 13px; }
    .quotes { display: grid; grid-template-columns: repeat(3,1fr); gap: 13px; }
    .quote { padding: 17px; border: 1px solid var(--line); background: #fff; }
    .quote p { margin-bottom: 12px; color: #45505f; font-size: 14px; }
    .quote strong { font-size: 13px; }
    .quote span { display: block; color: var(--muted); font-size: 12px; }
    .match-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field-full { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid #cfd4de; border-radius: 5px; color: var(--ink); background: #fff; }
    .field textarea { min-height: 112px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid rgba(53,108,227,.2); border-color: var(--blue); }
    .form-note { margin: 11px 0 0; color: var(--muted); font-size: 12px; }
    .form-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 38px; align-items: start; }
    .form-aside { color: var(--muted); }
    .form-aside h3 { color: var(--ink); }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-list details { border-bottom: 1px solid var(--line); }
    .faq-list summary { position: relative; padding: 15px 34px 15px 0; font-weight: 750; cursor: pointer; list-style: none; }
    .faq-list summary::-webkit-details-marker { display: none; }
    .faq-list summary::after { position: absolute; right: 4px; content: "+"; color: var(--coral); font-size: 21px; line-height: 1; }
    .faq-list details[open] summary::after { content: "−"; }
    .faq-list details p { max-width: 850px; margin: 0; padding: 0 30px 15px 0; color: var(--muted); font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
    .article-link { display: flex; min-height: 95px; align-items: end; padding: 13px; border: 1px solid var(--line); background: #fff; font-weight: 700; font-size: 14px; }
    .article-link:hover { border-color: var(--blue); color: var(--blue); }
    .contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; align-items: start; }
    .contact-details { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
    .contact-detail { padding: 13px; border: 1px solid var(--line); background: #fff; }
    .contact-detail span { display: block; color: var(--muted); font-size: 12px; }
    .contact-detail strong { overflow-wrap: anywhere; font-size: 14px; }
    .qr { max-width: 185px; margin-top: 16px; padding: 8px; border: 1px solid var(--line); background: #fff; }
    .join-band { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 24px; color: #fff; background: var(--blue); }
    .join-band h2 { margin-bottom: 5px; font-size: 23px; }
    .join-band p { margin: 0; color: #eaf0ff; }
    .site-footer { padding: 27px 0 22px; color: #283142; background: #f0eee9; }
    .footer-top { display: flex; justify-content: space-between; gap: 25px; align-items: start; }
    .footer-brand { font-weight: 800; font-size: 17px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 7px 16px; justify-content: flex-end; }
    .footer-links a { color: #414b5b; font-size: 13px; }
    .footer-links a:hover { color: var(--coral); }
    .copyright { margin: 19px 0 0; padding-top: 13px; border-top: 1px solid #d8d6d0; color: #5e6570; font-size: 12px; }
    .floating { position: fixed; right: 16px; bottom: 18px; z-index: 15; display: grid; gap: 8px; }
    .floating a, .top-button { display: inline-flex; min-width: 44px; min-height: 44px; align-items: center; justify-content: center; padding: 0 12px; border: 1px solid rgba(32,39,53,.12); border-radius: 7px; color: #fff; background: var(--ink); box-shadow: 0 5px 18px rgba(32,39,53,.18); font-size: 12px; font-weight: 750; cursor: pointer; }
    .floating a:first-child { background: var(--coral); }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: none; }
    @keyframes rise-in { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: translateY(0); } }
    @media (max-width: 980px) {
      .nav-row { flex-wrap: wrap; padding: 10px 0; }
      .nav-links { order: 3; width: 100%; justify-content: flex-start; }
      .nav-links a { padding: 7px 9px; }
      .service-grid { grid-template-columns: repeat(3,1fr); }
      .article-list { grid-template-columns: repeat(3,1fr); }
    }
    @media (max-width: 700px) {
      .container { width: min(var(--wrap), calc(100% - 30px)); }
      .nav-row { min-height: 62px; justify-content: space-between; }
      .nav-actions { margin-left: auto; }
      .nav-links { display: none; order: 4; padding: 7px 0 10px; }
      .nav-links.is-open { display: flex; }
      .menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
      .nav-actions .button { display: none; }
      .hero { padding: 47px 0 38px; }
      .hero-grid { grid-template-columns: 1fr; gap: 24px; }
      h1 { font-size: 42px; }
      .hero-copy { font-size: 15px; }
      .metric-row { grid-template-columns: 1fr 1fr; gap: 12px; }
      .metric { padding-left: 11px; }
      .section { padding: 48px 0; }
      .intro-grid, .network-row, .price-grid, .form-layout, .contact-grid { grid-template-columns: 1fr; gap: 22px; }
      .feature-list { grid-template-columns: 1fr 1fr; }
      .service-grid { grid-template-columns: 1fr 1fr; }
      .service-item { min-height: 0; padding: 15px; }
      .workflow { grid-template-columns: 1fr 1fr; row-gap: 18px; }
      .step { margin-top: 15px; }
      .solution-grid { grid-template-columns: 1fr; }
      .cases { grid-template-columns: 1fr 1fr; }
      .quotes { grid-template-columns: 1fr 1fr; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .join-band { align-items: flex-start; flex-direction: column; }
      .footer-top { flex-direction: column; }
      .footer-links { justify-content: flex-start; }
    }
    @media (max-width: 440px) {
      .service-grid, .cases, .quotes, .article-list { grid-template-columns: 1fr; }
      .feature-list, .contact-details, .match-form { grid-template-columns: 1fr; }
      .field-full { grid-column: auto; }
      .workflow { grid-template-columns: 1fr; }
      .step { margin-top: 14px; }
      .hero-actions .button { width: 100%; }
      .brand { font-size: 16px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }