:root {
      --ink: #152238;
      --muted: #607086;
      --blue: #175cff;
      --cyan: #10c9c3;
      --lime: #c9f33b;
      --orange: #ff8a35;
      --paper: #f7faff;
      --line: #dce6f2;
      --white: #ffffff;
      --shadow: 0 16px 40px rgba(26, 64, 112, .10);
      --container: min(1180px, calc(100% - 40px));
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      line-height: 1.7;
    }
    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; height: auto; display: block; }
    button, input, select, textarea { font: inherit; }
    .container { width: var(--container); margin: 0 auto; }
    .section { padding: 92px 0; position: relative; }
    .section-head { max-width: 720px; margin-bottom: 42px; }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--blue);
      font-weight: 800;
      font-size: 13px;
      letter-spacing: 1px;
      text-transform: uppercase;
    }
    .eyebrow::before {
      content: "";
      width: 28px;
      height: 4px;
      border-radius: 2px;
      background: var(--lime);
    }
    h1, h2, h3, p { margin-top: 0; }
    h1, h2, h3 { line-height: 1.18; }
    h1 { font-size: clamp(42px, 6vw, 76px); margin-bottom: 24px; letter-spacing: 0; }
    h2 { font-size: clamp(30px, 4vw, 48px); margin-bottom: 16px; }
    h3 { font-size: 20px; margin-bottom: 10px; }
    .lead { color: var(--muted); font-size: 18px; max-width: 680px; }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      min-height: 48px;
      padding: 0 22px;
      border: 1px solid transparent;
      border-radius: 8px;
      font-weight: 800;
      cursor: pointer;
      transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
    }
    .btn:hover { transform: translateY(-3px); box-shadow: 0 12px 24px rgba(23, 92, 255, .18); }
    .btn-primary { background: var(--blue); color: #fff; }
    .btn-secondary { background: #fff; color: var(--blue); border-color: var(--line); }
    .btn-lime { background: var(--lime); color: var(--ink); }
    .tag {
      display: inline-flex;
      align-items: center;
      min-height: 28px;
      padding: 2px 10px;
      border-radius: 20px;
      background: #e8f0ff;
      color: var(--blue);
      font-size: 12px;
      font-weight: 700;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(247, 250, 255, .94);
      border-bottom: 1px solid rgba(220, 230, 242, .9);
      backdrop-filter: blur(14px);
    }
    .header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; min-width: 150px; }
    .ai-page-logo { width: 132px; max-height: 44px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; gap: 0; }
    .nav-links a { padding: 8px 11px; color: #43536b; font-size: 13px; font-weight: 700; white-space: nowrap; }
    .nav-links a:hover { color: var(--blue); }
    .header-actions { display: flex; align-items: center; gap: 10px; }
    .header-actions .btn { min-height: 40px; padding: 0 15px; font-size: 13px; }
    .menu-toggle { display: none; border: 0; background: transparent; color: var(--ink); font-size: 26px; cursor: pointer; }

    .hero {
      overflow: hidden;
      padding: 112px 0 86px;
      background:
        linear-gradient(135deg, rgba(201, 243, 59, .28), transparent 35%),
        linear-gradient(180deg, #f5fbff 0%, #eaf3ff 100%);
      border-bottom: 1px solid var(--line);
    }
    .hero-grid { display: grid; grid-template-columns: 1.08fr .92fr; gap: 70px; align-items: center; }
    .hero-copy { position: relative; z-index: 1; }
    .hero h1 span { color: var(--blue); }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 30px 0 28px; }
    .hero-note { color: var(--muted); font-size: 13px; }
    .hero-visual {
      position: relative;
      min-height: 390px;
      display: grid;
      place-items: center;
    }
    .hero-visual::before {
      content: "";
      position: absolute;
      width: 330px;
      height: 330px;
      border: 1px solid rgba(23, 92, 255, .22);
      border-radius: 50%;
      animation: spin 18s linear infinite;
    }
    .hero-visual::after {
      content: "";
      position: absolute;
      width: 250px;
      height: 250px;
      border: 1px dashed rgba(16, 201, 195, .5);
      border-radius: 50%;
      animation: spin 12s linear infinite reverse;
    }
    .signal-panel {
      position: relative;
      z-index: 1;
      width: min(100%, 370px);
      padding: 27px;
      background: rgba(255, 255, 255, .88);
      border: 1px solid #fff;
      box-shadow: var(--shadow);
      border-radius: 18px;
    }
    .signal-top { display: flex; justify-content: space-between; align-items: center; margin-bottom: 25px; }
    .signal-dot { width: 12px; height: 12px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 0 8px rgba(201, 243, 59, .25); }
    .signal-title { font-weight: 900; font-size: 18px; }
    .signal-row { display: flex; align-items: center; justify-content: space-between; padding: 15px 0; border-top: 1px solid var(--line); }
    .signal-value { color: var(--blue); font-size: 25px; font-weight: 900; }
    .signal-label { color: var(--muted); font-size: 13px; }
    .hero-bar { margin-top: 58px; display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
    .hero-metric { padding: 17px 18px; background: rgba(255,255,255,.72); border-left: 4px solid var(--blue); }
    .hero-metric strong { display: block; font-size: 22px; }
    .hero-metric span { color: var(--muted); font-size: 13px; }

    .about { background: #fff; }
    .about-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 70px; align-items: start; }
    .about-copy p { color: var(--muted); }
    .principles { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
    .principle { padding: 23px; border: 1px solid var(--line); background: #fbfdff; border-radius: 10px; }
    .principle b { display: block; margin-bottom: 6px; }
    .principle span { color: var(--muted); font-size: 14px; }

    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .service-card { padding: 26px; background: #fff; border: 1px solid var(--line); border-radius: 10px; transition: transform .25s, box-shadow .25s; }
    .service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
    .service-icon { width: 44px; height: 44px; display: grid; place-items: center; margin-bottom: 18px; background: var(--lime); border-radius: 9px; color: var(--ink); font-weight: 900; }
    .service-card p { color: var(--muted); font-size: 14px; margin-bottom: 0; }
    .service-wide { grid-column: span 2; background: var(--ink); color: #fff; }
    .service-wide p { color: #c7d2e1; }
    .service-wide .tag { background: #294265; color: #dff2ff; }

    .workflow { background: #eaf4ff; }
    .steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; }
    .step { position: relative; padding: 24px 20px 20px; border-top: 3px solid var(--blue); }
    .step:not(:last-child)::after { content: "→"; position: absolute; right: -10px; top: 12px; color: var(--cyan); font-size: 23px; font-weight: 900; }
    .step-num { color: var(--blue); font-size: 13px; font-weight: 900; }
    .step p { color: var(--muted); font-size: 14px; }

    .solutions { background: #fff; }
    .solution-layout { display: grid; grid-template-columns: .82fr 1.18fr; gap: 30px; }
    .solution-list { display: grid; gap: 10px; }
    .solution-item { padding: 18px 20px; border: 1px solid var(--line); border-left: 5px solid var(--cyan); background: #fbfdff; }
    .solution-item strong { display: block; }
    .solution-item span { color: var(--muted); font-size: 13px; }
    .solution-feature { padding: 34px; background: linear-gradient(145deg, #175cff, #0c9ed2); border-radius: 14px; color: #fff; }
    .solution-feature p { color: #e7f6ff; }
    .solution-feature ul { padding-left: 20px; margin-bottom: 28px; }
    .solution-feature li { margin: 9px 0; }

    .network { background: var(--ink); color: #fff; }
    .network .section-head p { color: #c5d1df; }
    .network-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: center; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
    .model-cloud span { padding: 8px 13px; border: 1px solid #3b5575; border-radius: 5px; color: #e4edf8; font-size: 13px; }
    .network-panel { padding: 30px; background: #203550; border: 1px solid #395373; }
    .network-panel h3 { color: var(--lime); }
    .network-panel p { color: #c5d1df; }

    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .case-card { overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: 10px; }
    .case-media { aspect-ratio: 16 / 8; overflow: hidden; background: #dceeff; }
    .case-media img { width: 100%; height: 100%; object-fit: cover; }
    .case-body { padding: 22px; }
    .case-body p { color: var(--muted); font-size: 14px; }

    .compare { background: #f0f7ff; }
    .rating-box { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 26px 30px; margin-bottom: 25px; background: var(--ink); color: #fff; border-radius: 10px; }
    .rating-score { color: var(--lime); font-size: 40px; font-weight: 900; line-height: 1; }
    .stars { color: var(--lime); letter-spacing: 4px; font-size: 22px; }
    .table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--line); }
    table { width: 100%; min-width: 760px; border-collapse: collapse; text-align: left; }
    th, td { padding: 17px 20px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { background: #e9f1fc; font-size: 14px; }
    td { color: var(--muted); font-size: 14px; }
    td:first-child { color: var(--ink); font-weight: 800; }
    .good { color: var(--blue); font-weight: 800; }

    .token { background: #fff; }
    .token-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 26px; }
    .price-board { padding: 28px; background: #f6faff; border: 1px solid var(--line); }
    .price-line { display: flex; align-items: center; justify-content: space-between; padding: 16px 0; border-bottom: 1px solid var(--line); }
    .price-line:last-child { border-bottom: 0; }
    .price-line span { color: var(--muted); }
    .price-line strong { color: var(--blue); }
    .price-note { color: var(--muted); font-size: 13px; margin: 18px 0 0; }

    .reviews { background: #eaf4ff; }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 17px; }
    .review { padding: 23px; background: #fff; border-top: 4px solid var(--cyan); }
    .review p { color: #40536b; font-size: 14px; }
    .review footer { color: var(--blue); font-size: 13px; font-weight: 800; }

    .demand { background: #fff; }
    .demand-grid { display: grid; grid-template-columns: .82fr 1.18fr; gap: 60px; align-items: start; }
    .demand-points { display: grid; gap: 15px; margin-top: 28px; }
    .demand-point { display: flex; gap: 12px; align-items: flex-start; }
    .check { flex: 0 0 24px; height: 24px; display: grid; place-items: center; background: var(--lime); border-radius: 50%; font-weight: 900; }
    .demand-point span { color: var(--muted); font-size: 14px; }
    .form-panel { padding: 30px; background: #f3f8ff; border: 1px solid var(--line); }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
    .field { display: grid; gap: 7px; }
    .field.full { grid-column: 1 / -1; }
    label { font-size: 13px; font-weight: 800; }
    input, select, textarea { width: 100%; padding: 13px 14px; border: 1px solid #cbd9e9; border-radius: 6px; background: #fff; color: var(--ink); outline: none; }
    input:focus, select:focus, textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(23, 92, 255, .1); }
    textarea { min-height: 120px; resize: vertical; }
    .form-submit { margin-top: 18px; }

    .faq { background: #f5f9fe; }
    .faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 22px; }
    details { background: #fff; border: 1px solid var(--line); }
    summary { padding: 17px 20px; cursor: pointer; font-weight: 800; list-style: none; position: relative; padding-right: 45px; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 20px; color: var(--blue); font-size: 21px; }
    details[open] summary::after { content: "−"; }
    details p { padding: 0 20px 18px; margin: 0; color: var(--muted); font-size: 14px; }

    .articles { background: #fff; }
    .article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .article { padding: 22px; border: 1px solid var(--line); background: #fbfdff; }
    .article small { color: var(--blue); font-weight: 800; }
    .article h3 { margin-top: 12px; font-size: 18px; }
    .article p { color: var(--muted); font-size: 14px; }
    .article a { color: var(--blue); font-weight: 800; font-size: 13px; }

    .join { background: linear-gradient(135deg, #c9f33b, #e9f9a8); }
    .join-inner { display: flex; align-items: center; justify-content: space-between; gap: 30px; }
    .join p { max-width: 650px; color: #43521d; margin-bottom: 0; }

    .contact-strip { background: #fff; }
    .contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .contact-card { padding: 23px; border: 1px solid var(--line); }
    .contact-card strong { display: block; margin-bottom: 8px; }
    .contact-card span, .contact-card a { color: var(--muted); font-size: 14px; word-break: break-word; }

    .site-footer { padding: 46px 0 25px; background: #132238; color: #fff; }
    .footer-main { display: grid; grid-template-columns: 1.2fr 1fr 1fr 1fr; gap: 35px; }
    .footer-brand p { color: #b8c6d7; font-size: 14px; }
    .site-footer h3 { color: var(--lime); font-size: 15px; }
    .site-footer a { display: block; color: #d6e0ec; font-size: 13px; margin: 8px 0; }
    .site-footer a:hover { color: var(--lime); }
    .qr img { width: 116px; margin-top: 9px; }
    .copyright { margin-top: 32px; padding-top: 20px; border-top: 1px solid #30435d; color: #aebdd0; font-size: 12px; }

    .float-contact {
      position: fixed;
      right: 22px;
      bottom: 22px;
      z-index: 15;
      display: grid;
      place-items: center;
      width: 54px;
      height: 54px;
      background: var(--blue);
      color: #fff;
      border-radius: 50%;
      box-shadow: 0 10px 24px rgba(23, 92, 255, .3);
      font-size: 22px;
      cursor: pointer;
    }
    .float-contact:hover { transform: translateY(-3px); }
    .reveal { opacity: 0; transform: translateY(22px); transition: opacity .7s ease, transform .7s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @keyframes spin { to { transform: rotate(360deg); } }

    @media (max-width: 1050px) {
      .nav-links a { padding: 8px 7px; font-size: 12px; }
      .header-actions .btn { display: none; }
      .hero-grid, .about-grid, .solution-layout, .demand-grid { gap: 35px; }
    }
    @media (max-width: 820px) {
      .section { padding: 68px 0; }
      .menu-toggle { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        left: 20px;
        right: 20px;
        top: 70px;
        padding: 12px;
        background: #fff;
        border: 1px solid var(--line);
        box-shadow: var(--shadow);
        flex-direction: column;
        align-items: stretch;
      }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 11px 13px; }
      .hero-grid, .about-grid, .solution-layout, .network-grid, .token-layout, .demand-grid { grid-template-columns: 1fr; }
      .hero { padding-top: 75px; }
      .hero-visual { min-height: 315px; }
      .hero-bar { grid-template-columns: repeat(2, 1fr); }
      .service-grid, .case-grid, .review-grid, .article-grid { grid-template-columns: repeat(2, 1fr); }
      .service-wide { grid-column: span 2; }
      .steps { grid-template-columns: 1fr; }
      .step { border-top: 0; border-left: 3px solid var(--blue); padding-left: 24px; }
      .step:not(:last-child)::after { content: "↓"; right: auto; left: 8px; top: auto; bottom: -10px; }
      .faq-grid { grid-template-columns: 1fr; }
      .footer-main { grid-template-columns: 1fr 1fr; }
      .join-inner { align-items: flex-start; flex-direction: column; }
    }
    @media (max-width: 560px) {
      :root { --container: min(100% - 28px, 1180px); }
      .header-inner { min-height: 68px; }
      .ai-page-logo { width: 112px; }
      h1 { font-size: 42px; }
      .hero-actions, .hero-actions .btn { width: 100%; }
      .hero-actions .btn { min-height: 50px; }
      .hero-bar, .principles, .service-grid, .case-grid, .review-grid, .article-grid, .contact-grid, .footer-main { grid-template-columns: 1fr; }
      .service-wide { grid-column: auto; }
      .rating-box { align-items: flex-start; flex-direction: column; }
      .form-grid { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .float-contact { right: 15px; bottom: 15px; }
    }