:root {
      color-scheme: light;
      --ink: #17253e;
      --muted: #52627a;
      --blue: #1556d8;
      --blue-deep: #0d3da8;
      --cyan: #27b9cf;
      --line: #dce5f2;
      --paper: #f5f8fd;
      --white: #fff;
      --green: #177b67;
      --shadow: 0 16px 42px rgba(21, 56, 112, .11);
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", 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 { display: block; max-width: 100%; height: auto; }
    .container { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky;
      z-index: 20;
      top: 0;
      background: rgba(255,255,255,.96);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(12px);
    }
    .header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; flex: 0 0 auto; }
    .ai-page-logo { width: 142px; max-height: 48px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 9px 10px; color: #34445d; font-size: 13px; border-radius: 5px; }
    .nav-links a:hover { color: var(--blue); background: #edf4ff; }
    .nav-links .nav-cta { margin-left: 5px; padding: 10px 15px; color: white; background: var(--blue); font-weight: 700; }
    .menu-toggle { display: none; border: 1px solid var(--line); border-radius: 5px; padding: 8px 12px; color: var(--ink); background: white; }
    .hero {
      position: relative;
      overflow: hidden;
      color: white;
      background: linear-gradient(118deg, #0d3da8 0%, #1556d8 52%, #148abf 100%);
    }
    .hero::before, .hero::after { position: absolute; content: ""; border: 1px solid rgba(255,255,255,.18); transform: rotate(35deg); pointer-events: none; }
    .hero::before { width: 380px; height: 380px; right: -100px; top: -180px; border-radius: 34px; }
    .hero::after { width: 260px; height: 260px; right: 12%; bottom: -205px; border-radius: 50%; }
    .hero-inner { position: relative; z-index: 1; padding-block: 72px 48px; }
    .hero-copy { max-width: 760px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 17px; color: #d7f5ff; font-size: 13px; font-weight: 700; letter-spacing: 0; }
    .eyebrow::before { width: 22px; height: 2px; content: ""; background: var(--cyan); }
    h1 { max-width: 720px; margin: 0; font-size: clamp(36px, 5vw, 58px); line-height: 1.15; letter-spacing: 0; }
    .hero-copy > p { max-width: 690px; margin: 20px 0 27px; color: #e4f0ff; font-size: 17px; }
    .actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 11px 19px; border: 1px solid transparent; border-radius: 5px; font-weight: 700; transition: transform .18s ease, box-shadow .18s ease, background .18s ease; }
    .button:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(2,20,70,.2); }
    .button-light { color: var(--blue-deep); background: white; }
    .button-outline { color: white; border-color: rgba(255,255,255,.55); background: rgba(255,255,255,.08); }
    .hero-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 54px; border-top: 1px solid rgba(255,255,255,.25); }
    .hero-stat { padding: 18px 20px 0 0; }
    .hero-stat + .hero-stat { padding-left: 22px; border-left: 1px solid rgba(255,255,255,.25); }
    .hero-stat strong { display: block; font-size: 17px; }
    .hero-stat span { color: #d5e9ff; font-size: 13px; }
    section { padding-block: 68px; }
    .section-head { max-width: 700px; margin-bottom: 30px; }
    .section-kicker { margin: 0 0 8px; color: var(--blue); font-size: 12px; font-weight: 800; }
    h2 { margin: 0; color: var(--ink); font-size: 32px; line-height: 1.25; letter-spacing: 0; }
    .section-head > p:last-child { margin: 12px 0 0; color: var(--muted); }
    h3 { margin: 0 0 9px; font-size: 19px; line-height: 1.4; }
    p { margin-top: 0; }
    .intro-layout { display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px; align-items: start; }
    .intro-copy { color: var(--muted); }
    .intro-copy p:last-child { margin-bottom: 0; }
    .platform-points { display: grid; grid-template-columns: 1fr 1fr; gap: 0 18px; margin: 0; padding: 0; list-style: none; }
    .platform-points li { padding: 14px 0; border-bottom: 1px solid var(--line); }
    .platform-points strong { display: block; margin-bottom: 3px; color: var(--ink); font-size: 14px; }
    .platform-points span { color: var(--muted); font-size: 13px; }
    .band { background: white; border-block: 1px solid var(--line); }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .service-item { min-height: 150px; padding: 20px; border: 1px solid var(--line); border-top: 3px solid var(--blue); background: white; transition: transform .2s ease, box-shadow .2s ease; }
    .service-item:hover { transform: translateY(-3px); box-shadow: var(--shadow); }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-item small { display: block; margin-top: 11px; color: var(--blue); font-size: 12px; font-weight: 700; }
    .platform-cloud { display: flex; flex-wrap: wrap; gap: 9px; }
    .platform-cloud span { padding: 7px 11px; border: 1px solid #c9daf3; border-radius: 4px; color: #214d91; background: #f4f8ff; font-size: 13px; }
    .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
    .step { position: relative; padding: 16px 15px 0 0; border-top: 2px solid #9bc0f4; counter-increment: step; }
    .step::before { display: block; margin-bottom: 13px; color: var(--blue); content: "0" counter(step); font-size: 13px; font-weight: 800; }
    .step p { margin: 0; color: var(--muted); font-size: 14px; }
    .solutions { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .solution { overflow: hidden; border: 1px solid var(--line); background: white; }
    .solution-media { aspect-ratio: 16 / 9; overflow: hidden; background: #e8f0fb; }
    .solution-media img { width: 100%; height: 100%; object-fit: cover; }
    .solution-body { padding: 18px; }
    .solution-body p { margin: 0; color: var(--muted); font-size: 14px; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { padding: 19px; border-left: 3px solid var(--cyan); background: white; }
    .review blockquote { margin: 0 0 15px; color: #34445d; font-size: 14px; }
    .review p { margin: 0; color: var(--blue-deep); font-size: 13px; font-weight: 700; }
    .comparison { display: grid; grid-template-columns: .75fr 1.25fr; gap: 32px; align-items: start; }
    .score-panel { padding: 25px; color: white; background: var(--blue-deep); }
    .score-panel p { margin: 0; color: #dceaff; }
    .score { margin: 12px 0 4px; font-size: 46px; line-height: 1.1; font-weight: 800; }
    .stars { color: #ffda69; font-size: 22px; letter-spacing: 0; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: white; }
    table { width: 100%; border-collapse: collapse; text-align: left; }
    th, td { padding: 13px 15px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { color: var(--ink); background: #edf4ff; font-size: 13px; }
    td { color: var(--muted); font-size: 13px; }
    tr:last-child td { border-bottom: 0; }
    .match-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 42px; align-items: start; }
    .match-copy { color: var(--muted); }
    .match-copy ul { padding-left: 19px; }
    .match-copy li { margin: 7px 0; }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field-full { grid-column: 1 / -1; }
    label { color: var(--ink); font-size: 13px; font-weight: 700; }
    input, select, textarea { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid #cbd7e8; border-radius: 4px; outline: none; color: var(--ink); background: white; }
    textarea { min-height: 115px; resize: vertical; }
    input:focus, select:focus, textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(21,86,216,.12); }
    .form-note { margin: 10px 0 0; color: var(--muted); font-size: 12px; }
    .pricing-row { display: grid; grid-template-columns: 1fr auto; gap: 22px; align-items: center; padding: 20px 0; border-top: 1px solid var(--line); }
    .pricing-row:last-child { border-bottom: 1px solid var(--line); }
    .pricing-row p { margin: 0; color: var(--muted); font-size: 14px; }
    .pricing-row a { color: var(--blue); font-weight: 700; white-space: nowrap; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-list details { border-bottom: 1px solid var(--line); background: rgba(255,255,255,.72); }
    .faq-list summary { position: relative; padding: 17px 42px 17px 3px; cursor: pointer; font-weight: 700; list-style: none; }
    .faq-list summary::-webkit-details-marker { display: none; }
    .faq-list summary::after { position: absolute; top: 14px; right: 8px; color: var(--blue); content: "+"; font-size: 22px; }
    .faq-list details[open] summary::after { content: "−"; }
    .faq-list details p { margin: -2px 40px 17px 3px; color: var(--muted); font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 30px; }
    .article-link { display: flex; justify-content: space-between; gap: 15px; padding: 15px 0; border-bottom: 1px solid var(--line); color: var(--ink); }
    .article-link span:last-child { color: var(--blue); }
    .article-link:hover { color: var(--blue); }
    .contact-band { color: white; background: linear-gradient(110deg, #0d3da8, #1556d8 72%, #147da9); }
    .contact-band h2 { color: white; }
    .contact-band p { color: #e0ecff; }
    .contact-inner { display: flex; align-items: center; justify-content: space-between; gap: 25px; }
    .contact-inner .button { flex: 0 0 auto; }
    .footer { padding: 30px 0; color: #33445c; background: #eaf0f8; border-top: 1px solid #d2deec; }
    .footer-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 30px; }
    .footer p { margin: 7px 0; color: #52627a; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; align-content: start; }
    .footer-links a { color: #234b89; font-size: 13px; }
    .footer-links a:hover { text-decoration: underline; }
    .copyright { margin-top: 22px; padding-top: 14px; border-top: 1px solid #d2deec; color: #52627a; font-size: 12px; }
    .floating-tools { position: fixed; right: 16px; bottom: 20px; z-index: 15; display: grid; gap: 8px; }
    .floating-tools a, .floating-tools button { display: grid; min-width: 48px; min-height: 44px; place-items: center; padding: 7px 10px; border: 1px solid #cbd9ed; border-radius: 4px; color: var(--blue-deep); background: white; box-shadow: 0 5px 16px rgba(17,43,83,.12); font-size: 12px; font-weight: 700; cursor: pointer; }
    .floating-tools a:hover, .floating-tools button:hover { color: white; background: var(--blue); }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: translateY(0); }
    @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: 940px) {
      .header-inner { min-height: 68px; }
      .menu-toggle { display: inline-flex; align-items: center; gap: 7px; }
      .nav-links { display: none; position: absolute; top: 100%; left: 0; right: 0; align-items: stretch; padding: 10px 20px 16px; border-bottom: 1px solid var(--line); background: white; box-shadow: 0 12px 20px rgba(20,45,80,.08); }
      .nav-links.is-open { display: grid; grid-template-columns: repeat(3, 1fr); }
      .nav-links a { padding: 8px; }
      .nav-links .nav-cta { margin: 3px 0; text-align: center; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .comparison, .match-layout { grid-template-columns: 1fr; }
    }
    @media (max-width: 640px) {
      .container { width: min(100% - 32px, 1160px); }
      .ai-page-logo { width: 126px; }
      .hero-inner { padding-block: 56px 34px; }
      h1 { font-size: 38px; }
      .hero-copy > p { font-size: 15px; }
      .hero-strip { grid-template-columns: 1fr 1fr; row-gap: 17px; margin-top: 36px; }
      .hero-stat { padding: 0 8px 0 0; }
      .hero-stat + .hero-stat { padding-left: 12px; }
      .hero-stat:nth-child(3) { padding-left: 0; border-left: 0; }
      section { padding-block: 50px; }
      h2 { font-size: 27px; }
      .intro-layout, .service-grid, .solutions, .reviews, .steps, .footer-grid, .article-list { grid-template-columns: 1fr; }
      .intro-layout { gap: 24px; }
      .platform-points { grid-template-columns: 1fr; }
      .nav-links.is-open { grid-template-columns: repeat(2, 1fr); }
      .form-grid { grid-template-columns: 1fr; }
      .field-full { grid-column: auto; }
      .contact-inner { align-items: flex-start; flex-direction: column; }
      .pricing-row { grid-template-columns: 1fr; gap: 8px; }
      .pricing-row a { white-space: normal; }
      .floating-tools { right: 9px; bottom: 12px; }
      .floating-tools a, .floating-tools button { min-width: 43px; }
    }