:root {
      color-scheme: light;
      --ink: #20253b;
      --muted: #626981;
      --paper: #f7f8ff;
      --white: #fff;
      --line: #e3e6f0;
      --violet: #6555f5;
      --pink: #ef4ca2;
      --cyan: #21b8c7;
      --lime: #d6f257;
      --navy: #202748;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; }
    button, input, select, textarea { font: inherit; }
    button, a { -webkit-tap-highlight-color: transparent; }
    .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(32,37,59,.08);
      backdrop-filter: blur(14px);
    }
    .header-inner { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; flex: 0 0 auto; text-decoration: none; }
    .ai-page-logo { display: block; width: 148px; max-width: 100%; height: auto; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 8px 10px; color: #454b63; font-size: 13px; text-decoration: none; }
    .nav-links a:hover { color: var(--violet); }
    .nav-cta, .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 46px;
      padding: 11px 19px;
      border: 0;
      border-radius: 5px;
      background: var(--violet);
      color: #fff;
      font-weight: 700;
      text-decoration: none;
      cursor: pointer;
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .nav-cta { flex: 0 0 auto; min-height: 40px; padding: 8px 15px; font-size: 13px; }
    .button:hover, .nav-cta:hover { background: #5140e8; box-shadow: 0 9px 22px rgba(101,85,245,.22); transform: translateY(-2px); }
    .button.secondary { background: var(--white); color: var(--ink); border: 1px solid var(--line); }
    .button.secondary:hover { background: #f0efff; }
    .menu-toggle { display: none; width: 42px; height: 42px; align-items: center; justify-content: center; border: 1px solid var(--line); border-radius: 5px; background: #fff; color: var(--ink); cursor: pointer; }
    .menu-toggle span, .menu-toggle span::before, .menu-toggle span::after { display: block; width: 17px; height: 2px; background: currentColor; content: ""; }
    .menu-toggle span { position: relative; }
    .menu-toggle span::before { position: absolute; top: -6px; }
    .menu-toggle span::after { position: absolute; top: 6px; }
    .hero {
      overflow: hidden;
      position: relative;
      padding: 76px 0 60px;
      background: #fff;
      border-bottom: 1px solid var(--line);
    }
    .hero::before {
      position: absolute;
      inset: 0 0 auto;
      height: 8px;
      background: linear-gradient(90deg, var(--violet) 0 30%, var(--pink) 30% 58%, var(--cyan) 58% 80%, var(--lime) 80%);
      content: "";
    }
    .hero-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(280px, .85fr); gap: 55px; align-items: center; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--violet); font-size: 13px; font-weight: 800; letter-spacing: 0; }
    .eyebrow::before { width: 24px; height: 3px; background: var(--pink); content: ""; }
    h1 { max-width: 650px; margin: 17px 0 18px; font-size: clamp(42px, 6vw, 72px); line-height: 1.08; letter-spacing: 0; }
    h1 span { color: var(--violet); }
    .hero-copy { max-width: 600px; margin: 0; color: var(--muted); font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
    .hero-note { margin-top: 19px; color: #70758b; font-size: 13px; }
    .hero-art { min-height: 330px; position: relative; display: grid; place-items: center; }
    .shape-field { width: min(100%, 410px); aspect-ratio: 1.12; position: relative; }
    .shape-main { position: absolute; inset: 11% 9% 9% 11%; display: grid; place-items: center; overflow: hidden; border-radius: 44% 56% 56% 44% / 48% 43% 57% 52%; background: linear-gradient(135deg, #6857f6 0 34%, #ef4ca2 65%, #ff9a48); color: #fff; transform: rotate(-7deg); animation: float 6s ease-in-out infinite; }
    .shape-main::before { position: absolute; width: 58%; aspect-ratio: 1; right: -16%; bottom: -22%; border: 1px solid rgba(255,255,255,.55); border-radius: 50%; content: ""; }
    .shape-main strong { max-width: 210px; position: relative; font-size: 29px; line-height: 1.25; text-align: center; }
    .shape-chip { position: absolute; padding: 12px 16px; border: 1px solid #e5e5f0; background: #fff; box-shadow: 0 14px 32px rgba(32,37,59,.11); color: var(--ink); font-size: 13px; font-weight: 750; animation: float 5s ease-in-out infinite; }
    .shape-chip.one { top: 3%; left: 5%; border-radius: 20px 20px 20px 4px; }
    .shape-chip.two { right: 0; top: 37%; border-radius: 20px 4px 20px 20px; animation-delay: -1.2s; }
    .shape-chip.three { bottom: 2%; left: 15%; border-radius: 4px 20px 20px; animation-delay: -2s; }
    .hero-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; margin-top: 58px; background: var(--line); border: 1px solid var(--line); }
    .hero-stat { padding: 20px 22px; background: #fff; }
    .hero-stat strong { display: block; color: var(--violet); font-size: 23px; line-height: 1.2; }
    .hero-stat span { color: var(--muted); font-size: 13px; }
    .section { padding: 76px 0; }
    .section.alt { background: #f0f2ff; border-block: 1px solid #e7e8f4; }
    .section.dark { background: var(--navy); color: #fff; }
    .section.dark .section-intro, .section.dark .muted { color: #c5cae0; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .section-head > div { max-width: 700px; }
    .kicker { margin: 0 0 8px; color: var(--pink); font-size: 12px; font-weight: 800; text-transform: uppercase; }
    h2 { margin: 0; font-size: clamp(28px, 4vw, 42px); line-height: 1.2; letter-spacing: 0; }
    .section-intro { max-width: 650px; margin: 12px 0 0; color: var(--muted); }
    .text-link { display: inline-flex; align-items: center; gap: 7px; color: var(--violet); font-weight: 750; text-decoration: none; }
    .text-link:hover { text-decoration: underline; }
    .about-layout { display: grid; grid-template-columns: .82fr 1.18fr; gap: 48px; align-items: start; }
    .about-lead { border-left: 5px solid var(--pink); padding: 4px 0 4px 24px; }
    .about-lead h3 { margin: 0 0 13px; font-size: 25px; line-height: 1.3; }
    .about-lead p { margin: 0; color: var(--muted); }
    .capability-list { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 0 28px; }
    .capability-item { padding: 15px 0; border-top: 1px solid var(--line); }
    .capability-item strong { display: block; margin-bottom: 4px; }
    .capability-item span { color: var(--muted); font-size: 14px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; }
    .service-item { min-height: 150px; padding: 21px; background: #fff; border: 1px solid var(--line); border-top: 3px solid var(--violet); transition: transform .2s ease, box-shadow .2s ease; }
    .service-item:nth-child(3n+2) { border-top-color: var(--pink); }
    .service-item:nth-child(3n) { border-top-color: var(--cyan); }
    .service-item:hover { transform: translateY(-4px); box-shadow: 0 13px 28px rgba(36,41,74,.09); }
    .service-item h3 { margin: 0 0 7px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .wide-feature { display: grid; grid-template-columns: 1fr 1fr; gap: 0; margin-top: 28px; border: 1px solid var(--line); background: #fff; }
    .wide-feature > div { padding: 28px; }
    .wide-feature > div + div { border-left: 1px solid var(--line); }
    .wide-feature h3 { margin: 0 0 8px; font-size: 20px; }
    .wide-feature p { margin: 0; color: var(--muted); }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 24px; }
    .tag-cloud span { padding: 7px 12px; border: 1px solid rgba(255,255,255,.26); color: #f1f2fa; font-size: 13px; }
    .workflow { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 0; counter-reset: step; }
    .workflow article { position: relative; padding: 0 24px 0 0; }
    .workflow article::before { counter-increment: step; content: "0" counter(step); display: grid; place-items: center; width: 43px; height: 43px; margin-bottom: 15px; border-radius: 50%; background: var(--violet); color: #fff; font-size: 13px; font-weight: 800; }
    .workflow article:not(:last-child)::after { position: absolute; top: 21px; left: 53px; right: 20px; border-top: 1px dashed #a8a9bd; content: ""; }
    .workflow h3 { margin: 0 0 6px; font-size: 17px; }
    .workflow p { margin: 0; color: var(--muted); font-size: 14px; }
    .industry-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 1px; background: #daddec; border: 1px solid #daddec; }
    .industry-grid div { padding: 18px; background: #fff; }
    .industry-grid strong { display: block; margin-bottom: 5px; font-size: 15px; }
    .industry-grid span { color: var(--muted); font-size: 13px; }
    .network-line { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 18px; }
    .network-line article { padding-top: 15px; border-top: 3px solid var(--cyan); }
    .network-line article:nth-child(2) { border-color: var(--pink); }
    .network-line article:nth-child(3) { border-color: var(--violet); }
    .network-line article:nth-child(4) { border-color: var(--lime); }
    .network-line h3 { margin: 0 0 6px; font-size: 17px; }
    .network-line p { margin: 0; color: var(--muted); font-size: 14px; }
    .case-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 16px; }
    .case-item { overflow: hidden; background: #fff; border: 1px solid var(--line); }
    .case-item .case-band { min-height: 116px; display: flex; align-items: end; padding: 17px; background: linear-gradient(120deg, #6050f2, #e94b9c); color: #fff; }
    .case-item:nth-child(2) .case-band { background: linear-gradient(120deg, #20aebb, #73d8bd); }
    .case-item:nth-child(3) .case-band { background: linear-gradient(120deg, #f28943, #f1c74d); }
    .case-item h3 { margin: 0; font-size: 18px; }
    .case-item p { margin: 0; padding: 18px; color: var(--muted); font-size: 14px; }
    .rating-row { display: grid; grid-template-columns: .68fr 1.32fr; gap: 32px; align-items: center; margin-bottom: 26px; padding: 24px; background: #fff; color: var(--ink); }
    .rating-score { padding-right: 26px; border-right: 1px solid var(--line); }
    .rating-score strong { display: block; color: var(--violet); font-size: 50px; line-height: 1; }
    .rating-score span { color: var(--muted); font-size: 14px; }
    .stars { color: #e2aa16; letter-spacing: 0; font-size: 20px; }
    .table-wrap { overflow-x: auto; background: #fff; }
    table { width: 100%; min-width: 680px; border-collapse: collapse; color: var(--ink); text-align: left; }
    th, td { padding: 14px 17px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { background: #f1f0ff; font-size: 13px; }
    td { font-size: 14px; }
    td:first-child { font-weight: 750; }
    .price-strip { display: grid; grid-template-columns: 1fr auto; gap: 25px; align-items: center; padding: 28px; background: var(--lime); color: var(--ink); }
    .price-strip h3 { margin: 0 0 5px; font-size: 22px; }
    .price-strip p { margin: 0; color: #3d4552; }
    .price-strip .button { background: var(--navy); }
    .reviews { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; }
    .review { padding: 19px; background: #fff; border: 1px solid var(--line); }
    .review blockquote { margin: 0 0 15px; color: #42485e; font-size: 14px; }
    .review footer { color: var(--ink); font-size: 13px; font-weight: 750; }
    .review footer span { display: block; color: var(--muted); font-weight: 400; }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 17px 38px 17px 2px; cursor: pointer; font-weight: 700; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { position: absolute; right: 5px; content: "+"; color: var(--violet); font-size: 23px; line-height: 1; }
    details[open] summary::after { content: "−"; }
    details p { margin: 0; padding: 0 35px 17px 2px; color: var(--muted); font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 0 30px; }
    .article-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--line); text-decoration: none; }
    .article-row span { font-weight: 700; }
    .article-row small { flex: 0 0 auto; color: var(--muted); }
    .article-row:hover span { color: var(--violet); }
    .form-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 50px; align-items: start; }
    .contact-copy h3 { margin: 0 0 11px; font-size: 25px; }
    .contact-copy p { color: #c5cae0; }
    .contact-details { margin-top: 25px; padding-top: 19px; border-top: 1px solid rgba(255,255,255,.2); color: #f0f1fa; font-size: 14px; }
    .contact-details a { color: #fff; }
    .contact-form { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 14px; padding: 23px; background: #fff; color: var(--ink); }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; padding: 11px 12px; border: 1px solid #d9dce8; border-radius: 3px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 110px; resize: vertical; }
    .contact-form .button { justify-self: start; }
    .join-band { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 27px 0; border-bottom: 1px solid var(--line); }
    .join-band h3 { margin: 0; font-size: 21px; }
    .join-band p { margin: 5px 0 0; color: var(--muted); }
    .footer { padding: 27px 0; background: #fff; color: var(--ink); border-top: 1px solid var(--line); }
    .footer-main { display: flex; align-items: flex-start; justify-content: space-between; gap: 28px; }
    .footer-brand p { margin: 10px 0 0; color: var(--muted); font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 17px; max-width: 650px; }
    .footer-links a { color: #4d5368; font-size: 13px; text-decoration: none; }
    .footer-links a:hover { color: var(--violet); }
    .copyright { margin-top: 17px; padding-top: 13px; border-top: 1px solid var(--line); color: #6a7084; font-size: 12px; }
    .float-contact { position: fixed; z-index: 15; right: 18px; bottom: 20px; }
    .float-contact a { display: grid; place-items: center; width: 54px; height: 54px; border-radius: 50%; background: var(--pink); color: #fff; box-shadow: 0 8px 24px rgba(239,76,162,.3); text-decoration: none; font-size: 12px; font-weight: 800; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @keyframes float { 0%,100% { translate: 0 0; } 50% { translate: 0 -9px; } }
    @media (max-width: 1000px) {
      .header-inner { flex-wrap: wrap; padding: 12px 0; }
      .menu-toggle { display: inline-flex; margin-left: auto; }
      .nav-cta { order: 2; }
      .nav-links { display: none; order: 3; width: 100%; justify-content: flex-start; padding: 8px 0 3px; border-top: 1px solid var(--line); }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 8px 12px 8px 0; }
      .hero-grid { gap: 24px; }
      .service-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
    }
    @media (max-width: 700px) {
      .container { width: min(var(--container), calc(100% - 30px)); }
      .hero { padding: 55px 0 39px; }
      .hero-grid, .about-layout, .form-layout { grid-template-columns: 1fr; }
      .hero-grid { gap: 14px; }
      .hero-art { min-height: 255px; }
      .shape-field { width: min(78%, 320px); }
      .shape-main strong { font-size: 23px; }
      .hero-stats { margin-top: 30px; }
      .hero-stat { padding: 14px 10px; }
      .hero-stat strong { font-size: 18px; }
      .hero-stat span { font-size: 11px; }
      .section { padding: 55px 0; }
      .section-head { display: block; }
      .section-head > .text-link { margin-top: 13px; }
      .service-grid, .case-grid, .reviews { grid-template-columns: 1fr; }
      .service-item { min-height: 0; }
      .wide-feature { grid-template-columns: 1fr; }
      .wide-feature > div + div { border-left: 0; border-top: 1px solid var(--line); }
      .capability-list { gap: 0 16px; }
      .workflow { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 26px 16px; }
      .workflow article::after { display: none; }
      .industry-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .network-line { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .rating-row { grid-template-columns: 1fr; gap: 15px; }
      .rating-score { padding: 0 0 14px; border-right: 0; border-bottom: 1px solid var(--line); }
      .price-strip { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: 1fr; }
      .contact-form { grid-template-columns: 1fr; padding: 17px; }
      .field.full { grid-column: auto; }
      .join-band, .footer-main { align-items: flex-start; flex-direction: column; }
      .footer-links { justify-content: flex-start; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }