:root {
      color-scheme: light;
      --ink: #142343;
      --muted: #596987;
      --blue: #1558d6;
      --blue-dark: #103f9c;
      --sky: #eaf2ff;
      --line: #dce5f3;
      --paper: #ffffff;
      --soft: #f4f7fc;
      --teal: #137f91;
      --radius: 20px;
      --shadow: 0 16px 42px rgba(31, 66, 132, .09);
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 90px; }
    body {
      margin: 0;
      background: linear-gradient(180deg, #f4f8ff 0%, #fff 34%, #f7f9fd 72%, #f3f7ff 100%);
      color: var(--ink);
      font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
      line-height: 1.7;
    }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    button, a { -webkit-tap-highlight-color: transparent; }
    img { max-width: 100%; }
    .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 rgba(211,222,240,.85);
      backdrop-filter: blur(14px);
    }
    .nav-row { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; flex: 0 0 auto; }
    .ai-page-logo { display: block; width: 42px; }
    .brand-name { font-size: 17px; font-weight: 800; letter-spacing: .04em; }
    .nav-side { display: flex; align-items: center; justify-content: flex-end; gap: 20px; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 9px 10px; color: #394866; font-size: 13px; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover { color: var(--blue); }
    .nav-cta, .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      border: 0;
      border-radius: 999px;
      padding: 12px 20px;
      color: #fff;
      background: var(--blue);
      font-weight: 700;
      box-shadow: 0 8px 20px rgba(21,88,214,.22);
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
      cursor: pointer;
    }
    .nav-cta { padding: 10px 16px; font-size: 13px; white-space: nowrap; }
    .button:hover, .nav-cta:hover { background: var(--blue-dark); box-shadow: 0 12px 26px rgba(21,88,214,.28); transform: translateY(-2px); }
    .button.secondary { color: var(--blue-dark); background: #fff; border: 1px solid #cbdaf4; box-shadow: none; }
    .button.secondary:hover { background: #f0f5ff; }
    .menu-toggle { display: none; width: 42px; height: 42px; align-items: center; justify-content: center; color: var(--ink); border: 1px solid var(--line); border-radius: 12px; background: #fff; cursor: pointer; }
    .hero { position: relative; overflow: hidden; padding: 76px 0 54px; }
    .hero::before, .hero::after { content: ""; position: absolute; z-index: 0; pointer-events: none; border-radius: 50%; }
    .hero::before { width: 440px; height: 440px; right: -125px; top: 5px; border: 1px solid rgba(21,88,214,.12); box-shadow: 0 0 0 42px rgba(21,88,214,.025), 0 0 0 84px rgba(21,88,214,.02); }
    .hero::after { width: 9px; height: 9px; top: 98px; right: 17%; background: #4e8dff; box-shadow: 34px 124px 0 #8fc3ff, -80px 205px 0 #38a2bd; }
    .hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(270px, .75fr); gap: 55px; align-items: center; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--blue); font-weight: 800; font-size: 12px; letter-spacing: .12em; text-transform: uppercase; }
    .eyebrow::before { content: ""; width: 22px; height: 2px; background: currentColor; }
    h1 { max-width: 700px; margin: 18px 0; font-size: clamp(38px, 6vw, 66px); line-height: 1.12; letter-spacing: -.045em; }
    .hero h1 span { color: var(--blue); }
    .hero-copy { max-width: 650px; margin: 0; color: var(--muted); font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
    .hero-note { margin-top: 18px; color: #687792; font-size: 13px; }
    .hero-panel { position: relative; padding: 26px; border: 1px solid #d7e4f8; border-radius: 28px; background: linear-gradient(145deg, #fff 0%, #edf4ff 100%); box-shadow: var(--shadow); }
    .hero-panel::before { content: ""; position: absolute; inset: 10px; z-index: -1; border: 1px solid rgba(21,88,214,.12); border-radius: 22px; transform: rotate(3deg); }
    .panel-kicker { color: #6480ae; font-size: 12px; font-weight: 800; letter-spacing: .1em; }
    .panel-title { margin: 7px 0 19px; font-size: 21px; line-height: 1.35; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-cloud span, .tag { display: inline-flex; align-items: center; border: 1px solid #d7e3f4; border-radius: 999px; padding: 6px 11px; background: #fff; color: #334765; font-size: 12px; }
    .panel-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: 22px; padding-top: 17px; border-top: 1px solid #dce6f5; color: #536887; font-size: 12px; }
    .panel-foot strong { color: var(--blue-dark); font-size: 14px; }
    .metric-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; overflow: hidden; margin-top: 48px; border: 1px solid #dce5f2; border-radius: 16px; background: #dce5f2; }
    .metric { padding: 19px 20px; background: rgba(255,255,255,.92); }
    .metric strong { display: block; color: var(--blue-dark); font-size: 17px; }
    .metric span { color: #697893; font-size: 12px; }
    .section { padding: 76px 0; }
    .section.soft { background: rgba(237,243,253,.76); border-block: 1px solid #e5ebf5; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .section-head > div { max-width: 730px; }
    .section-kicker { margin: 0 0 8px; color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .12em; }
    h2 { margin: 0; font-size: clamp(27px, 4vw, 39px); line-height: 1.22; letter-spacing: -.035em; }
    .section-intro { max-width: 610px; margin: 12px 0 0; color: var(--muted); }
    h3 { margin: 0; font-size: 19px; line-height: 1.35; }
    .intro-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 24px; align-items: stretch; }
    .intro-copy { padding: 30px; border-radius: var(--radius); background: var(--ink); color: #fff; }
    .intro-copy p { margin: 14px 0 0; color: #d6e1f5; }
    .intro-copy h3 { color: #fff; font-size: 24px; }
    .intro-points { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
    .intro-point { padding: 20px; border: 1px solid var(--line); border-radius: 16px; background: #fff; }
    .intro-point strong { display: block; margin-bottom: 6px; color: var(--blue-dark); }
    .intro-point span { color: var(--muted); font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 15px; }
    .service-card { position: relative; padding: 22px; border: 1px solid var(--line); border-radius: 17px; background: #fff; transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease; }
    .service-card:hover { transform: translateY(-4px); border-color: #b4cbf2; box-shadow: 0 14px 30px rgba(31,66,132,.1); }
    .service-card p { margin: 9px 0 0; color: var(--muted); font-size: 13px; }
    .service-mark { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; margin-bottom: 14px; border-radius: 12px; color: var(--blue-dark); background: #eaf2ff; font-size: 17px; font-weight: 800; }
    .wide-card { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; align-items: center; padding: 28px; border-radius: 22px; background: linear-gradient(130deg, #e8f1ff, #fff 75%); border: 1px solid #d7e4f8; }
    .wide-card p { color: var(--muted); }
    .check-list { display: grid; gap: 10px; padding: 0; margin: 20px 0 0; list-style: none; }
    .check-list li { display: flex; gap: 10px; color: #344764; font-size: 14px; }
    .check-list li::before { content: "✓"; flex: 0 0 auto; color: var(--teal); font-weight: 900; }
    .poster-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 20px; }
    .image-frame { overflow: hidden; border-radius: 17px; background: #e8eef8; }
    .image-frame img { display: block; width: 100%; height: auto; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 13px; counter-reset: steps; }
    .step { position: relative; padding: 22px; border-top: 3px solid var(--blue); border-radius: 0 0 15px 15px; background: #fff; box-shadow: 0 8px 25px rgba(31,66,132,.06); counter-increment: steps; }
    .step::before { content: "0" counter(steps); display: block; margin-bottom: 15px; color: #8aabdf; font-size: 13px; font-weight: 800; letter-spacing: .08em; }
    .step p { margin: 8px 0 0; color: var(--muted); font-size: 13px; }
    .industries { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
    .industry { padding: 15px 16px; border: 1px solid #dce5f2; border-radius: 13px; background: rgba(255,255,255,.86); color: #334765; font-size: 14px; }
    .industry strong { display: block; margin-bottom: 3px; color: var(--ink); }
    .network { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: center; }
    .network-box { padding: 26px; border-radius: 20px; color: #fff; background: linear-gradient(145deg, #174ba8, #12336e); }
    .network-box h3 { color: #fff; font-size: 23px; }
    .network-box p { color: #d9e7ff; }
    .network-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
    .network-tags span { padding: 7px 11px; border: 1px solid rgba(255,255,255,.25); border-radius: 999px; color: #fff; font-size: 12px; }
    .timeline { display: grid; gap: 0; border-left: 2px solid #c9d9f3; margin-left: 8px; padding-left: 23px; }
    .timeline-item { position: relative; padding: 0 0 22px; }
    .timeline-item:last-child { padding-bottom: 0; }
    .timeline-item::before { content: ""; position: absolute; width: 10px; height: 10px; left: -29px; top: 7px; border: 3px solid #fff; border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 1px #98b6e8; }
    .timeline-item p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
    .case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .case-card { overflow: hidden; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
    .case-card img { display: block; width: 100%; height: auto; }
    .case-body { padding: 19px 21px 21px; }
    .case-body p { margin: 7px 0 0; color: var(--muted); font-size: 13px; }
    .evaluation { display: grid; grid-template-columns: .72fr 1.28fr; gap: 24px; align-items: stretch; }
    .score-card { display: flex; flex-direction: column; justify-content: center; padding: 27px; border-radius: 20px; color: #fff; background: linear-gradient(145deg, #1558d6, #103d91); }
    .score-label { color: #d9e8ff; font-size: 13px; }
    .score-number { margin: 5px 0; font-size: 54px; line-height: 1; font-weight: 850; letter-spacing: -.05em; }
    .stars { color: #ffd477; letter-spacing: .14em; font-size: 20px; }
    .score-card p { margin: 12px 0 0; color: #deebff; font-size: 13px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 17px; background: #fff; }
    table { width: 100%; border-collapse: collapse; min-width: 560px; }
    th, td { padding: 14px 16px; text-align: left; border-bottom: 1px solid #e8edf5; font-size: 13px; }
    th { color: #455675; background: #f0f5fd; }
    td:first-child { color: #243653; font-weight: 700; }
    tr:last-child td { border-bottom: 0; }
    .good { color: #087a68; font-weight: 700; }
    .note { margin: 12px 0 0; color: #6b7890; font-size: 12px; }
    .fit-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 24px; align-items: start; }
    .fit-copy { padding: 27px; border-radius: 20px; background: #eaf2ff; }
    .fit-copy p { color: var(--muted); }
    .form-card { padding: 26px; border: 1px solid var(--line); border-radius: 20px; background: #fff; box-shadow: var(--shadow); }
    .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: #3b4c68; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; padding: 11px 12px; border: 1px solid #ced9e9; border-radius: 10px; color: var(--ink); background: #fff; outline: 0; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: #5d8fe6; box-shadow: 0 0 0 3px rgba(21,88,214,.1); }
    .field textarea { min-height: 112px; resize: vertical; }
    .form-actions { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 14px; margin-top: 16px; }
    .form-actions small { color: #72809a; font-size: 12px; }
    .token-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
    .token-card { padding: 25px; border-radius: 18px; background: #fff; border: 1px solid var(--line); }
    .token-card p { margin-bottom: 0; color: var(--muted); font-size: 14px; }
    .token-chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 17px; }
    .token-chips span { padding: 7px 10px; border-radius: 9px; background: #edf4ff; color: #284c86; font-size: 12px; }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { padding: 20px; border: 1px solid var(--line); border-radius: 16px; background: #fff; }
    .review p { margin: 10px 0 15px; color: #455570; font-size: 14px; }
    .review strong { display: block; color: var(--ink); font-size: 13px; }
    .review span { color: #74819a; font-size: 12px; }
    .faq-list { display: grid; gap: 10px; }
    .faq-item { border: 1px solid var(--line); border-radius: 14px; background: #fff; }
    .faq-item summary { position: relative; padding: 17px 48px 17px 19px; cursor: pointer; list-style: none; font-weight: 700; color: #243653; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; right: 19px; top: 50%; color: var(--blue); font-size: 22px; transform: translateY(-50%); }
    .faq-item[open] summary::after { content: "−"; }
    .faq-answer { padding: 0 19px 17px; color: var(--muted); font-size: 14px; }
    .faq-answer p { margin: 0; }
    .resource-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
    .resource-panel { padding: 24px; border: 1px solid var(--line); border-radius: 18px; background: #fff; }
    .resource-list { display: grid; gap: 10px; margin-top: 16px; }
    .resource-list a { padding: 12px 14px; border-radius: 11px; color: #234474; background: #f1f6ff; font-size: 13px; transition: background .2s ease, color .2s ease; }
    .resource-list a:hover { color: var(--blue-dark); background: #e2edff; }
    .resource-panel p { color: var(--muted); font-size: 13px; }
    .contact-band { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center; padding: 27px; border-radius: 20px; color: #fff; background: linear-gradient(110deg, #123d8f, #1766df); }
    .contact-band h2 { font-size: 27px; }
    .contact-band p { margin: 8px 0 0; color: #dce9ff; }
    .contact-links { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 16px; }
    .contact-links a { color: #fff; text-decoration: underline; text-decoration-color: rgba(255,255,255,.55); text-underline-offset: 3px; font-size: 13px; }
    .contact-band .button { color: var(--blue-dark); background: #fff; box-shadow: none; white-space: nowrap; }
    .contact-band .button:hover { background: #eaf2ff; }
    .qr { width: 118px; padding: 8px; border-radius: 12px; background: #fff; }
    .qr img { display: block; width: 100%; height: auto; }
    .affiliate { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 23px 25px; border: 1px solid #d9e4f4; border-radius: 17px; background: #fff; }
    .affiliate p { margin: 5px 0 0; color: var(--muted); font-size: 13px; }
    .site-footer { margin-top: 0; padding: 30px 0 24px; color: #d9e4f6; background: #122344; }
    .footer-top { display: flex; align-items: start; justify-content: space-between; gap: 24px; padding-bottom: 20px; border-bottom: 1px solid rgba(255,255,255,.14); }
    .footer-brand { color: #fff; font-weight: 800; }
    .footer-copy { max-width: 520px; margin: 6px 0 0; color: #b8c7df; font-size: 12px; }
    .footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 9px 16px; max-width: 560px; }
    .footer-links a { color: #d8e5fa; font-size: 12px; }
    .footer-links a:hover { color: #fff; text-decoration: underline; }
    .copyright { padding-top: 15px; color: #b8c7df; font-size: 12px; }
    .float-help { position: fixed; z-index: 15; right: 20px; bottom: 20px; display: flex; align-items: center; gap: 9px; padding: 11px 15px; border: 1px solid #d6e2f3; border-radius: 999px; color: var(--blue-dark); background: #fff; box-shadow: 0 8px 28px rgba(20,45,90,.16); font-size: 13px; font-weight: 800; transition: transform .2s ease; }
    .float-help:hover { transform: translateY(-3px); }
    .float-dot { width: 9px; height: 9px; border-radius: 50%; background: #19a488; box-shadow: 0 0 0 4px #dff6ef; }
    .reveal { opacity: 0; transform: translateY(16px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @media (max-width: 980px) {
      .nav-row { gap: 12px; }
      .nav-side { gap: 10px; }
      .nav-links a { padding-inline: 7px; font-size: 12px; }
      .nav-cta { padding-inline: 12px; }
      .hero-grid { gap: 30px; }
      .industries { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .nav-row { min-height: 66px; }
      .menu-toggle { display: inline-flex; }
      .nav-side { gap: 9px; }
      .nav-links { display: none; position: absolute; top: 65px; left: 0; right: 0; align-items: stretch; padding: 10px 16px 14px; border-bottom: 1px solid var(--line); background: #fff; box-shadow: 0 12px 20px rgba(20,45,90,.08); }
      .nav-links.open { display: grid; grid-template-columns: repeat(2, 1fr); }
      .nav-links a { padding: 10px 12px; border-radius: 8px; font-size: 14px; }
      .nav-links a:hover { background: #f0f5ff; }
      .nav-cta { font-size: 12px; }
      .hero { padding: 54px 0 38px; }
      .hero-grid, .intro-grid, .wide-card, .network, .evaluation, .fit-grid, .token-layout, .resource-grid { grid-template-columns: 1fr; }
      .hero-grid { gap: 28px; }
      .hero-panel { max-width: 520px; }
      .metric-strip { grid-template-columns: repeat(2, 1fr); margin-top: 34px; }
      .section { padding: 58px 0; }
      .section-head { align-items: start; flex-direction: column; }
      .service-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .workflow { grid-template-columns: repeat(2, 1fr); }
      .industries { grid-template-columns: repeat(2, 1fr); }
      .review-grid { grid-template-columns: repeat(2, 1fr); }
      .contact-band { grid-template-columns: 1fr; }
      .contact-right { display: flex; align-items: center; justify-content: space-between; gap: 16px; }
      .footer-top { flex-direction: column; }
      .footer-links { justify-content: flex-start; }
    }
    @media (max-width: 500px) {
      h1 { font-size: 39px; }
      .hero-copy { font-size: 15px; }
      .hero-actions { align-items: stretch; }
      .hero-actions .button { flex: 1 1 auto; padding-inline: 14px; }
      .hero-panel { padding: 21px; }
      .service-grid, .workflow, .review-grid, .case-grid, .poster-row { grid-template-columns: 1fr; }
      .intro-points { grid-template-columns: 1fr; }
      .industries { grid-template-columns: 1fr 1fr; }
      .metric { padding: 15px; }
      .form-grid { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .affiliate { align-items: flex-start; flex-direction: column; }
      .contact-right { align-items: flex-start; flex-direction: column; }
      .float-help { right: 12px; bottom: 12px; }
      .score-number { font-size: 48px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }