:root {
      color-scheme: dark;
      --bg: #100d1b;
      --surface: #191426;
      --surface-2: #211a30;
      --ink: #f5f1fb;
      --muted: #b9b0c9;
      --line: #393047;
      --pink: #ff4caa;
      --violet: #b897ff;
      --cyan: #67e2da;
      --max: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    body {
      margin: 0;
      background: var(--bg);
      color: var(--ink);
      font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; text-decoration: none; }
    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; background: rgba(16,13,27,.96); border-bottom: 1px solid var(--line); }
    .nav-row { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 12px; flex: 0 0 auto; font-weight: 750; }
    .ai-page-logo { display: block; width: 40px; height: auto; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 9px 10px; color: var(--muted); font-size: 13px; transition: color .2s ease; }
    .nav-links a:hover, .nav-links a:focus-visible { color: var(--ink); }
    .nav-links .nav-cta { margin-left: 12px; padding: 10px 16px; color: #1a1020; background: var(--pink); font-weight: 750; }
    .menu-toggle { display: none; color: var(--ink); background: transparent; border: 1px solid var(--line); padding: 8px 12px; cursor: pointer; }
    .hero { position: relative; overflow: hidden; border-bottom: 1px solid var(--line); background: linear-gradient(118deg,#171026 0%,#24132d 50%,#171126 100%); }
    .hero::before { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .24; background-image: linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px); background-size: 48px 48px; mask-image: linear-gradient(to bottom,black,transparent 88%); }
    .hero-inner { position: relative; display: grid; grid-template-columns: minmax(0,1.15fr) minmax(280px,.85fr); align-items: center; gap: 56px; padding-top: 72px; padding-bottom: 60px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--cyan); font-size: 13px; font-weight: 700; }
    .eyebrow::before { content: ""; width: 20px; height: 1px; background: currentColor; }
    h1 { max-width: 720px; margin: 18px 0 18px; font-size: clamp(38px, 6vw, 68px); line-height: 1.12; font-weight: 760; }
    h1 span { color: var(--pink); }
    .hero-copy { max-width: 610px; margin: 0; color: var(--muted); font-size: 17px; }
    .actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 28px; }
    .button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 19px; border: 1px solid var(--line); background: transparent; color: var(--ink); font-weight: 700; transition: transform .2s, box-shadow .2s, background .2s; }
    .button:hover { transform: translateY(-2px); box-shadow: 0 9px 28px rgba(255,76,170,.18); }
    .button-primary { color: #1b1020; border-color: var(--pink); background: var(--pink); }
    .button-secondary { border-color: #685473; }
    .hero-note { color: var(--muted); font-size: 12px; margin-top: 14px; }
    .signal-panel { border: 1px solid #61405f; background: rgba(25,20,38,.82); padding: 26px; }
    .signal-panel h2 { margin: 0 0 18px; font-size: 16px; }
    .signal-row { display: flex; justify-content: space-between; gap: 18px; padding: 14px 0; border-top: 1px solid var(--line); }
    .signal-row strong { color: var(--cyan); font-size: 14px; text-align: right; }
    .signal-row span { color: var(--muted); font-size: 13px; }
    .signal-foot { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
    .metrics { display: grid; grid-template-columns: repeat(4,1fr); border-bottom: 1px solid var(--line); }
    .metric { padding: 23px 18px; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; color: var(--pink); font-size: 19px; }
    .metric span { color: var(--muted); font-size: 12px; }
    main { background: radial-gradient(ellipse at 85% 16%,rgba(106,51,112,.12),transparent 34%),var(--bg); }
    .section { padding: 72px 0; border-bottom: 1px solid rgba(57,48,71,.78); }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .kicker { color: var(--cyan); font-size: 12px; font-weight: 700; }
    h2 { margin: 7px 0 0; font-size: 30px; line-height: 1.25; }
    .section-intro { max-width: 540px; margin: 0; color: var(--muted); font-size: 14px; }
    .about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 42px; align-items: start; }
    .about-grid p { color: var(--muted); margin: 0 0 16px; }
    .text-link { color: var(--cyan); font-weight: 700; }
    .feature-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 20px; margin: 0; padding: 0; list-style: none; }
    .feature-list li { border-top: 1px solid var(--line); padding: 13px 0; color: var(--muted); font-size: 14px; }
    .feature-list li strong { display: block; color: var(--ink); font-size: 14px; }
    .service-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .service { border-top: 2px solid var(--pink); padding: 19px 18px 20px; background: var(--surface); transition: transform .2s, background .2s; }
    .service:hover { transform: translateY(-3px); background: var(--surface-2); }
    .service h3 { margin: 0 0 8px; font-size: 16px; }
    .service p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-wide { grid-column: span 2; }
    .service-wide p { max-width: 670px; }
    .tag-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
    .tag { border: 1px solid #50435d; padding: 5px 10px; color: #d9cde7; font-size: 12px; }
    .workflow { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .step { padding: 22px 20px 22px 0; }
    .step + .step { padding-left: 20px; border-left: 1px solid var(--line); }
    .step-num { color: var(--pink); font-size: 12px; font-weight: 800; }
    .step h3 { margin: 8px 0 6px; font-size: 16px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }
    .industry-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
    .industry { padding: 4px 20px 4px 0; border-right: 1px solid var(--line); }
    .industry:last-child { border: 0; }
    .industry h3 { margin: 0 0 8px; font-size: 16px; }
    .industry p { margin: 0; color: var(--muted); font-size: 13px; }
    .network { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: start; }
    .network p { color: var(--muted); margin: 0 0 16px; }
    .model-list { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-list span { padding: 5px 9px; background: var(--surface-2); color: #e5dbee; font-size: 12px; }
    .score { display: flex; align-items: center; gap: 18px; margin-bottom: 20px; }
    .score strong { color: var(--pink); font-size: 42px; line-height: 1; }
    .score span { color: var(--muted); font-size: 13px; }
    .stars { color: #ffd36b; letter-spacing: 0; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); }
    table { width: 100%; border-collapse: collapse; min-width: 650px; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); font-size: 13px; }
    th { background: var(--surface-2); color: var(--ink); }
    td { color: var(--muted); }
    td:first-child { color: var(--ink); font-weight: 650; }
    .good { color: var(--cyan); }
    .review-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; }
    .review { padding: 19px; border-left: 2px solid var(--violet); background: var(--surface); }
    .review p { margin: 0 0 14px; color: #e2dce9; font-size: 13px; }
    .review span { color: var(--muted); font-size: 12px; }
    .case-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .case { padding: 22px; background: var(--surface); }
    .case h3 { margin: 0 0 8px; font-size: 17px; }
    .case p { margin: 0; color: var(--muted); font-size: 13px; }
    .case-label { display: inline-block; margin-bottom: 10px; color: var(--cyan); font-size: 11px; font-weight: 700; }
    .article-links { display: grid; grid-template-columns: repeat(2,1fr); gap: 0 28px; }
    .article-links a { display: flex; justify-content: space-between; gap: 12px; padding: 14px 0; border-bottom: 1px solid var(--line); color: var(--ink); font-size: 14px; }
    .article-links a span { color: var(--muted); font-size: 12px; }
    .price-band { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 24px; padding: 26px; border: 1px solid #61405f; background: linear-gradient(100deg,#21162d,#191426); }
    .price-band h3 { margin: 0 0 6px; }
    .price-band p { margin: 0; color: var(--muted); font-size: 13px; }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 17px 38px 17px 0; cursor: pointer; list-style: none; font-weight: 650; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 5px; top: 14px; color: var(--pink); font-size: 20px; }
    details[open] summary::after { content: "−"; }
    details p { max-width: 800px; margin: 0 0 18px; color: var(--muted); font-size: 14px; }
    .contact-grid { display: grid; grid-template-columns: minmax(0,1.15fr) minmax(260px,.85fr); gap: 44px; 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; }
    .field label { color: var(--muted); font-size: 12px; }
    .field input, .field select, .field textarea { width: 100%; min-height: 44px; padding: 10px 12px; color: var(--ink); border: 1px solid var(--line); border-radius: 0; background: var(--surface); }
    .field textarea { min-height: 112px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--violet); outline-offset: 1px; }
    .contact-info { border-left: 1px solid var(--line); padding-left: 26px; }
    .contact-info h3 { margin: 0 0 12px; font-size: 17px; }
    .contact-info p { margin: 7px 0; color: var(--muted); font-size: 13px; }
    .qr { width: 150px; margin-top: 18px; padding: 8px; background: #fff; }
    .join-band { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 26px 0 0; }
    .join-band h3 { margin: 0 0 5px; font-size: 18px; }
    .join-band p { margin: 0; color: var(--muted); font-size: 13px; }
    .site-footer { color: var(--muted); background: #0c0a14; }
    .footer-row { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding-top: 24px; padding-bottom: 24px; font-size: 12px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; }
    .footer-links a { color: #d9d1e3; }
    .float-contact { position: fixed; z-index: 15; right: 18px; bottom: 18px; display: grid; gap: 8px; }
    .float-contact a { padding: 11px 14px; color: #180f20; background: var(--pink); font-size: 12px; font-weight: 800; box-shadow: 0 6px 22px rgba(0,0,0,.28); }
    .float-contact a:last-child { color: var(--ink); background: var(--surface-2); border: 1px solid var(--line); }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: none; }
    @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: 900px) {
      .nav-row { min-height: 68px; }
      .menu-toggle { display: inline-flex; align-items: center; }
      .nav-links { display: none; position: absolute; top: 68px; left: 0; right: 0; padding: 12px 20px 18px; background: #100d1b; border-bottom: 1px solid var(--line); align-items: stretch; }
      .nav-links.is-open { display: grid; grid-template-columns: repeat(3,1fr); }
      .nav-links a { padding: 10px 8px; }
      .nav-links .nav-cta { margin: 4px 0 0; grid-column: 1 / -1; text-align: center; }
      .hero-inner { gap: 28px; }
      .service-grid { grid-template-columns: repeat(2,1fr); }
      .workflow { grid-template-columns: repeat(2,1fr); }
      .step:nth-child(3) { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); }
      .step:nth-child(4) { border-top: 1px solid var(--line); }
    }
    @media (max-width: 620px) {
      .container { width: min(var(--max), calc(100% - 32px)); }
      .hero-inner { grid-template-columns: 1fr; padding-top: 50px; padding-bottom: 38px; }
      h1 { font-size: 40px; }
      .hero-copy { font-size: 15px; }
      .signal-panel { padding: 18px; }
      .metrics { grid-template-columns: 1fr 1fr; }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(n+3) { border-top: 1px solid var(--line); }
      .section { padding: 52px 0; }
      .section-head { display: block; }
      .section-intro { margin-top: 12px; }
      h2 { font-size: 25px; }
      .about-grid, .network, .contact-grid, .case-layout { grid-template-columns: 1fr; gap: 24px; }
      .feature-list { grid-template-columns: 1fr; }
      .service-grid, .review-grid, .industry-grid { grid-template-columns: 1fr; }
      .service-wide { grid-column: auto; }
      .industry { padding: 0 0 17px; border-right: 0; border-bottom: 1px solid var(--line); }
      .industry:last-child { border-bottom: 0; }
      .workflow { grid-template-columns: 1fr; }
      .step, .step + .step, .step:nth-child(3), .step:nth-child(4) { padding: 17px 0; border-left: 0; border-top: 1px solid var(--line); }
      .step:first-child { border-top: 0; }
      .article-links { grid-template-columns: 1fr; }
      .price-band { grid-template-columns: 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .field-full { grid-column: auto; }
      .contact-info { border-left: 0; border-top: 1px solid var(--line); padding: 20px 0 0; }
      .join-band, .footer-row { align-items: flex-start; flex-direction: column; }
      .float-contact { right: 10px; bottom: 10px; }
      .float-contact a { padding: 9px 11px; }
      .nav-links.is-open { grid-template-columns: repeat(2,1fr); }
    }