:root {
      --bg: #090711;
      --surface: #12101d;
      --surface-2: #19152a;
      --line: rgba(255,255,255,.12);
      --text: #f7f2ff;
      --muted: #b9aecb;
      --pink: #ff3d9a;
      --violet: #9b5cff;
      --cyan: #55e8ff;
      --lime: #c4ff56;
      --max: 1180px;
      --radius: 16px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      background: var(--bg);
      color: var(--text);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      line-height: 1.7;
      letter-spacing: 0;
    }
    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; height: auto; display: block; }
    button, input, select, textarea { font: inherit; }
    .container { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }
    .topbar {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(9,7,17,.88);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--line);
    }
    .nav {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }
    .brand { display: flex; align-items: center; flex: 0 0 auto; }
    .ai-page-logo { width: 118px; }
    .nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 0;
      flex-wrap: wrap;
    }
    .nav-links a {
      padding: 8px 10px;
      color: #d5cbe4;
      font-size: 13px;
      transition: color .2s ease;
    }
    .nav-links a:hover { color: var(--cyan); }
    .nav-cta, .primary-btn, .secondary-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border-radius: 8px;
      border: 1px solid transparent;
      padding: 12px 18px;
      font-weight: 700;
      cursor: pointer;
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .nav-cta, .primary-btn {
      color: #160a1a;
      background: linear-gradient(100deg, var(--pink), #ff76c0);
      box-shadow: 0 8px 25px rgba(255,61,154,.22);
    }
    .secondary-btn {
      color: var(--text);
      background: transparent;
      border-color: rgba(255,255,255,.24);
    }
    .nav-cta:hover, .primary-btn:hover, .secondary-btn:hover { transform: translateY(-2px); }
    .nav-cta { white-space: nowrap; padding: 10px 15px; font-size: 13px; }
    .menu-toggle {
      display: none;
      background: transparent;
      border: 1px solid var(--line);
      color: var(--text);
      border-radius: 8px;
      padding: 8px 10px;
      cursor: pointer;
    }
    .hero {
      position: relative;
      overflow: hidden;
      min-height: 670px;
      display: flex;
      align-items: center;
      background:
        linear-gradient(120deg, rgba(255,61,154,.08), transparent 38%),
        linear-gradient(315deg, rgba(85,232,255,.07), transparent 42%),
        var(--bg);
    }
    .hero:before, .hero:after {
      content: "";
      position: absolute;
      pointer-events: none;
      border: 1px solid rgba(255,61,154,.25);
      transform: rotate(25deg);
    }
    .hero:before { width: 330px; height: 330px; right: 6%; top: 12%; border-radius: 40px; }
    .hero:after { width: 210px; height: 210px; right: 21%; bottom: 8%; border-color: rgba(85,232,255,.22); border-radius: 50%; }
    .hero-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: 1.08fr .92fr;
      gap: 70px;
      align-items: center;
    }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--cyan);
      font-size: 13px;
      letter-spacing: 1px;
      text-transform: uppercase;
    }
    .eyebrow:before { content: ""; width: 28px; height: 2px; background: var(--pink); }
    h1, h2, h3, p { margin-top: 0; }
    h1 {
      max-width: 700px;
      margin: 18px 0;
      font-size: clamp(38px, 6vw, 72px);
      line-height: 1.12;
      letter-spacing: 0;
    }
    .hero h1 strong { color: var(--pink); font-weight: 800; }
    .hero-copy { max-width: 630px; color: var(--muted); font-size: 18px; }
    .hero-actions { display: flex; gap: 12px; flex-wrap: wrap; margin: 30px 0; }
    .hero-note { color: #877c9e; font-size: 13px; }
    .hero-panel {
      position: relative;
      padding: 25px;
      border: 1px solid var(--line);
      background: rgba(25,21,42,.72);
      border-radius: 22px;
      box-shadow: 0 25px 80px rgba(0,0,0,.34);
    }
    .panel-head { display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--line); padding-bottom: 15px; margin-bottom: 18px; }
    .panel-title { font-size: 14px; color: #e8dff4; }
    .status { color: var(--lime); font-size: 12px; }
    .signal-list { display: grid; gap: 12px; }
    .signal {
      display: grid;
      grid-template-columns: 38px 1fr auto;
      gap: 12px;
      align-items: center;
      padding: 13px;
      background: rgba(255,255,255,.045);
      border: 1px solid rgba(255,255,255,.08);
      border-radius: 11px;
    }
    .signal-icon { color: var(--pink); font-size: 20px; }
    .signal b { display: block; font-size: 14px; }
    .signal small { color: var(--muted); font-size: 12px; }
    .signal em { color: var(--cyan); font-size: 12px; font-style: normal; }
    section { padding: 100px 0; }
    .section-dark { background: #0d0b16; }
    .section-alt { background: #110d1d; }
    .section-heading { max-width: 720px; margin-bottom: 42px; }
    .section-heading h2 { margin: 12px 0; font-size: clamp(29px, 4vw, 46px); line-height: 1.18; }
    .section-heading p { color: var(--muted); margin-bottom: 0; }
    .stats { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-top: 55px; }
    .stat { padding: 24px; border-left: 2px solid var(--pink); background: rgba(255,255,255,.04); }
    .stat strong { display: block; font-size: 30px; color: var(--cyan); }
    .stat span { color: var(--muted); font-size: 13px; }
    .about-layout { display: grid; grid-template-columns: .82fr 1.18fr; gap: 55px; align-items: start; }
    .about-lead { font-size: 23px; line-height: 1.45; color: #f4eafb; }
    .about-copy { color: var(--muted); }
    .feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
    .feature { padding: 20px; border: 1px solid var(--line); border-radius: 12px; background: linear-gradient(145deg, rgba(155,92,255,.13), rgba(255,255,255,.025)); }
    .feature h3 { font-size: 17px; margin: 0 0 7px; color: #fff; }
    .feature p { color: var(--muted); margin: 0; font-size: 14px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .service-card { padding: 24px; min-height: 210px; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease; }
    .service-card:hover { transform: translateY(-5px); border-color: rgba(255,61,154,.6); box-shadow: 0 16px 35px rgba(0,0,0,.22); }
    .service-number { color: var(--pink); font-size: 12px; }
    .service-card h3 { margin: 14px 0 8px; font-size: 19px; }
    .service-card p { color: var(--muted); font-size: 14px; margin-bottom: 14px; }
    .service-card a { color: var(--cyan); font-size: 13px; }
    .process { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; border-top: 1px solid var(--line); }
    .step { position: relative; padding: 28px 18px 10px 0; }
    .step:not(:last-child):after { content: "→"; position: absolute; right: 15px; top: 27px; color: var(--pink); font-size: 22px; }
    .step-index { color: var(--lime); font-size: 13px; }
    .step h3 { font-size: 17px; margin: 12px 0 7px; }
    .step p { color: var(--muted); font-size: 13px; margin: 0; }
    .solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
    .solution { padding: 22px; border-top: 3px solid var(--violet); background: var(--surface-2); }
    .solution h3 { margin-bottom: 8px; font-size: 18px; }
    .solution p { margin: 0; color: var(--muted); font-size: 14px; }
    .network-wrap { display: grid; grid-template-columns: .78fr 1.22fr; gap: 40px; align-items: start; }
    .network-note { color: var(--muted); }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
    .tag { border: 1px solid rgba(85,232,255,.32); color: #d6faff; padding: 7px 12px; border-radius: 999px; font-size: 13px; background: rgba(85,232,255,.06); }
    .price-box { display: grid; grid-template-columns: .8fr 1.2fr; gap: 25px; align-items: center; margin-top: 36px; padding: 28px; border: 1px solid rgba(255,61,154,.3); background: linear-gradient(110deg, rgba(255,61,154,.12), rgba(155,92,255,.08)); }
    .price-box strong { display: block; color: var(--pink); font-size: 30px; }
    .price-box p { margin: 4px 0 0; color: var(--muted); }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; }
    table { width: 100%; min-width: 720px; border-collapse: collapse; background: var(--surface); }
    th, td { padding: 16px 18px; text-align: left; border-bottom: 1px solid var(--line); font-size: 14px; }
    th { color: var(--cyan); background: rgba(85,232,255,.06); font-weight: 700; }
    td { color: var(--muted); }
    td:first-child { color: var(--text); font-weight: 600; }
    tr:last-child td { border-bottom: 0; }
    .rating { display: flex; align-items: end; gap: 22px; margin-bottom: 28px; }
    .rating-score { font-size: 56px; line-height: 1; color: var(--pink); font-weight: 800; }
    .stars { color: #ffd35a; letter-spacing: 4px; font-size: 22px; }
    .rating small { color: var(--muted); }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .case { overflow: hidden; border: 1px solid var(--line); background: var(--surface); border-radius: 14px; }
    .case-media { aspect-ratio: 16 / 9; overflow: hidden; background: #181226; }
    .case-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .35s ease; }
    .case:hover .case-media img { transform: scale(1.04); }
    .case-body { padding: 19px; }
    .case-body h3 { margin-bottom: 7px; font-size: 18px; }
    .case-body p { margin: 0; color: var(--muted); font-size: 14px; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
    .review { padding: 22px; background: #151122; border: 1px solid var(--line); border-radius: 12px; }
    .review p { color: #ded4e9; font-size: 14px; }
    .review footer { color: var(--cyan); font-size: 13px; }
    .article-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .article { min-height: 125px; padding: 17px; border: 1px solid var(--line); background: rgba(255,255,255,.035); border-radius: 10px; }
    .article span { display: block; color: var(--pink); font-size: 12px; margin-bottom: 8px; }
    .article h3 { font-size: 15px; line-height: 1.45; margin: 0; }
    .article:hover { border-color: var(--cyan); }
    .faq-list { display: grid; gap: 10px; max-width: 900px; }
    details { border: 1px solid var(--line); background: var(--surface); border-radius: 10px; padding: 0 19px; }
    summary { cursor: pointer; padding: 17px 0; font-weight: 700; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary:after { content: "+"; float: right; color: var(--pink); font-size: 20px; }
    details[open] summary:after { content: "−"; }
    details p { color: var(--muted); padding: 0 28px 17px 0; margin: 0; font-size: 14px; }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 45px; }
    .contact-info p { color: var(--muted); }
    .contact-links { display: grid; gap: 12px; margin-top: 25px; }
    .contact-links a { color: var(--cyan); }
    form { display: grid; gap: 15px; padding: 27px; border: 1px solid var(--line); background: var(--surface); border-radius: 14px; }
    .form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    label { display: grid; gap: 6px; color: #e6ddec; font-size: 13px; }
    input, select, textarea { width: 100%; border: 1px solid rgba(255,255,255,.16); color: var(--text); background: #0c0a14; border-radius: 7px; padding: 12px 13px; outline: none; }
    input:focus, select:focus, textarea:focus { border-color: var(--pink); box-shadow: 0 0 0 3px rgba(255,61,154,.12); }
    textarea { min-height: 120px; resize: vertical; }
    .join-banner { display: flex; align-items: center; justify-content: space-between; gap: 25px; padding: 30px; border: 1px solid rgba(196,255,86,.28); background: rgba(196,255,86,.06); }
    .join-banner h2 { margin: 0 0 6px; font-size: 28px; }
    .join-banner p { margin: 0; color: var(--muted); }
    footer { padding: 55px 0 24px; background: #07060c; border-top: 1px solid var(--line); }
    .footer-grid { display: grid; grid-template-columns: 1.1fr .9fr .9fr; gap: 35px; }
    footer h3 { font-size: 16px; margin-bottom: 13px; }
    footer p, footer a { color: #a79bb7; font-size: 13px; }
    .footer-links { display: grid; gap: 5px; }
    .qr { width: 108px; margin-top: 8px; border: 4px solid #fff; }
    .copyright { border-top: 1px solid var(--line); margin-top: 35px; padding-top: 18px; color: #756b82; font-size: 12px; }
    .float-contact, .back-top { position: fixed; z-index: 15; right: 20px; width: 46px; height: 46px; display: grid; place-items: center; border-radius: 50%; cursor: pointer; border: 1px solid rgba(255,255,255,.2); }
    .float-contact { bottom: 78px; background: var(--pink); color: #170817; font-weight: 800; }
    .back-top { bottom: 20px; background: #211832; color: var(--cyan); display: none; }
    .reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @media (max-width: 1050px) {
      .nav-links a { padding: 7px 6px; font-size: 12px; }
      .hero-grid, .about-layout, .network-wrap, .contact-grid { grid-template-columns: 1fr; }
      .hero { min-height: auto; padding: 90px 0; }
      .hero-panel { max-width: 650px; }
      .service-grid, .solution-grid { grid-template-columns: repeat(2, 1fr); }
      .article-grid { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 720px) {
      .container { width: min(var(--max), calc(100% - 28px)); }
      .nav { min-height: 68px; }
      .menu-toggle { display: block; }
      .nav-links { display: none; position: absolute; left: 14px; right: 14px; top: 68px; padding: 12px; background: #120e1e; border: 1px solid var(--line); border-radius: 10px; }
      .nav-links.open { display: grid; grid-template-columns: repeat(2, 1fr); }
      .nav-links a { padding: 9px; }
      .nav-cta { display: none; }
      .hero { padding: 72px 0 65px; }
      .hero h1 { font-size: 42px; }
      section { padding: 70px 0; }
      .stats, .service-grid, .solution-grid, .case-grid, .reviews { grid-template-columns: 1fr; }
      .feature-list, .form-row { grid-template-columns: 1fr; }
      .process { grid-template-columns: 1fr; border-top: 0; }
      .step { padding: 18px 0; border-top: 1px solid var(--line); }
      .step:not(:last-child):after { content: "↓"; right: 5px; top: 18px; }
      .price-box { grid-template-columns: 1fr; }
      .article-grid { grid-template-columns: repeat(2, 1fr); }
      .join-banner { display: block; }
      .join-banner .primary-btn { margin-top: 20px; }
      .footer-grid { grid-template-columns: 1fr; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *:before, *:after { scroll-behavior: auto !important; animation: none !important; transition: none !important; }
      .reveal { opacity: 1; transform: none; }
    }