:root {
      color-scheme: light;
      --ink: #14233d;
      --muted: #5f6e84;
      --blue: #174fd2;
      --blue-dark: #123ba1;
      --cyan: #18a9c7;
      --line: #dbe4f2;
      --paper: #f6f9ff;
      --white: #fff;
      --green: #167d62;
      --gold: #f0a928;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      background: #f7f9fd;
      color: var(--ink);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", 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(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      border-bottom: 1px solid rgba(219,228,242,.9);
      background: rgba(255,255,255,.96);
      backdrop-filter: blur(12px);
    }
    .nav-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; font-weight: 800; font-size: 18px; }
    .ai-page-logo { display: block; width: 42px; max-width: 100%; height: auto; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; min-width: 0; }
    .nav-links a { padding: 10px 12px; color: #344660; font-size: 14px; white-space: nowrap; border-radius: 4px; transition: color .2s, background .2s; }
    .nav-links a:hover { color: var(--blue); background: #edf3ff; }
    .nav-links .nav-cta { margin-left: 8px; padding: 10px 16px; color: #fff; background: var(--blue); font-weight: 700; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 4px; cursor: pointer; }
    .hero { position: relative; overflow: hidden; color: #fff; background: linear-gradient(120deg, #103b9c 0%, #1558d8 58%, #087eaa 100%); }
    .hero::before, .hero::after { content: ""; position: absolute; pointer-events: none; }
    .hero::before { inset: 0; opacity: .14; background-image: linear-gradient(rgba(255,255,255,.25) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.25) 1px, transparent 1px); background-size: 42px 42px; mask-image: linear-gradient(90deg, black, transparent 85%); }
    .hero::after { width: 390px; height: 390px; right: 7%; top: 20px; border: 1px solid rgba(255,255,255,.2); border-radius: 50%; box-shadow: 0 0 0 42px rgba(255,255,255,.035), 0 0 0 84px rgba(255,255,255,.025); }
    .hero-inner { position: relative; z-index: 1; padding-block: 88px 74px; }
    .hero-copy { max-width: 760px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 20px; color: #d7f5ff; font-size: 13px; font-weight: 700; letter-spacing: 0; }
    .eyebrow::before { content: ""; width: 24px; height: 2px; background: #4de0e6; }
    h1 { max-width: 680px; margin: 0; font-size: clamp(38px, 6vw, 64px); line-height: 1.13; letter-spacing: 0; }
    .hero-copy > p { max-width: 660px; margin: 22px 0 28px; color: #e2edff; font-size: 18px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .button { display: inline-flex; min-height: 48px; align-items: center; justify-content: center; gap: 8px; padding: 12px 20px; border: 1px solid transparent; border-radius: 4px; font-weight: 750; transition: transform .18s, box-shadow .18s, background .18s; cursor: pointer; }
    .button:hover { transform: translateY(-2px); box-shadow: 0 9px 22px rgba(8,31,81,.2); }
    .button-primary { background: #fff; color: #133f9e; }
    .button-outline { border-color: rgba(255,255,255,.6); color: #fff; background: rgba(255,255,255,.08); }
    .hero-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 34px; }
    .hero-tags span { padding: 6px 11px; border: 1px solid rgba(255,255,255,.24); color: #edf5ff; font-size: 13px; }
    .metrics { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(4, 1fr); margin-top: -1px; background: #fff; border: 1px solid var(--line); border-top: 0; }
    .metric { padding: 22px 24px; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; color: var(--blue); font-size: 22px; line-height: 1.25; }
    .metric span { display: block; margin-top: 5px; color: var(--muted); font-size: 13px; }
    .section { padding: 76px 0; }
    .section-alt { background: #edf3fb; border-block: 1px solid #e1e9f5; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 30px; }
    .section-head > div { max-width: 730px; }
    .kicker { margin: 0 0 8px; color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
    h2 { margin: 0; font-size: clamp(26px, 4vw, 38px); line-height: 1.25; letter-spacing: 0; }
    .section-lead { margin: 12px 0 0; color: var(--muted); }
    .text-link { color: var(--blue); font-weight: 750; white-space: nowrap; }
    .text-link:hover { text-decoration: underline; }
    .intro-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: start; }
    .intro-copy p { margin: 0 0 16px; color: #40516b; }
    .capability-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 24px; margin: 22px 0 0; padding: 0; list-style: none; }
    .capability-list li { padding: 12px 0; border-bottom: 1px solid var(--line); color: #334660; }
    .capability-list li::before { content: "✓"; margin-right: 9px; color: var(--green); font-weight: 800; }
    .intro-aside { padding: 24px; background: #fff; border-left: 4px solid var(--cyan); }
    .intro-aside h3 { margin: 0 0 12px; font-size: 18px; }
    .intro-aside p { margin: 0; color: var(--muted); }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .service-item { min-height: 168px; padding: 22px; background: #fff; border: 1px solid var(--line); transition: transform .2s, border-color .2s, box-shadow .2s; }
    .service-item:hover { transform: translateY(-3px); border-color: #9db9f4; box-shadow: 0 12px 28px rgba(23,79,210,.09); }
    .service-item h3 { margin: 0 0 8px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-item .service-index { display: block; margin-bottom: 12px; color: var(--cyan); font-size: 12px; font-weight: 800; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-block: 1px solid var(--line); }
    .step { position: relative; padding: 25px 22px; border-right: 1px solid var(--line); }
    .step:last-child { border-right: 0; }
    .step strong { display: block; margin-bottom: 8px; color: var(--blue); font-size: 14px; }
    .step h3 { margin: 0 0 8px; font-size: 18px; }
    .step p { margin: 0; color: var(--muted); font-size: 14px; }
    .solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .solution { padding: 23px; border-top: 3px solid var(--blue); background: #fff; }
    .solution h3 { margin: 0 0 9px; font-size: 18px; }
    .solution p { margin: 0; color: var(--muted); font-size: 14px; }
    .network-strip { display: flex; flex-wrap: wrap; gap: 9px; }
    .network-strip span { padding: 8px 12px; background: #fff; border: 1px solid var(--line); color: #31445f; font-size: 14px; }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { padding: 20px; background: #fff; border: 1px solid var(--line); }
    .review blockquote { margin: 0 0 18px; color: #3d4d65; font-size: 14px; }
    .review cite { color: var(--blue-dark); font-size: 13px; font-style: normal; font-weight: 750; }
    .case-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 18px; align-items: start; }
    .case-feature { overflow: hidden; background: #fff; border: 1px solid var(--line); }
    .image-frame { overflow: hidden; background: #e6edf8; }
    .image-frame img { display: block; width: 100%; height: auto; object-fit: contain; }
    .case-caption { padding: 17px 19px; }
    .case-caption h3 { margin: 0 0 5px; font-size: 17px; }
    .case-caption p { margin: 0; color: var(--muted); font-size: 14px; }
    .case-side { display: grid; gap: 14px; }
    .case-note { padding: 18px; background: #fff; border-left: 3px solid var(--cyan); }
    .case-note h3 { margin: 0 0 6px; font-size: 16px; }
    .case-note p { margin: 0; color: var(--muted); font-size: 14px; }
    .comparison-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    .comparison { width: 100%; min-width: 700px; border-collapse: collapse; }
    .comparison th, .comparison td { padding: 14px 16px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
    .comparison th { background: #eaf1ff; color: #193e8b; font-size: 14px; }
    .comparison td { color: #40516b; font-size: 14px; }
    .score-row { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 18px; padding: 20px 24px; background: #123f9e; color: #fff; }
    .score-row strong { font-size: 26px; }
    .stars { color: #ffd36a; letter-spacing: 0; }
    .articles { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .article-link { display: flex; min-height: 92px; align-items: center; padding: 16px; background: #fff; border: 1px solid var(--line); color: #30435f; font-weight: 700; transition: border-color .2s, color .2s; }
    .article-link:hover { border-color: var(--blue); color: var(--blue); }
    .price-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: start; }
    .price-copy p { margin: 12px 0; color: var(--muted); }
    .price-list { margin: 0; padding: 0; list-style: none; border-top: 1px solid var(--line); }
    .price-list li { padding: 12px 0; border-bottom: 1px solid var(--line); color: #3c4e67; }
    .price-list strong { color: var(--ink); }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { position: relative; padding: 17px 42px 17px 0; cursor: pointer; font-weight: 750; list-style: none; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; right: 7px; top: 12px; color: var(--blue); font-size: 24px; font-weight: 400; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { max-width: 850px; margin: 0; padding: 0 32px 18px 0; color: var(--muted); }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 44px; align-items: start; }
    .contact-info h3 { margin: 0 0 12px; font-size: 21px; }
    .contact-info p { margin: 7px 0; color: #40516b; }
    .contact-info a { color: var(--blue); font-weight: 650; }
    .contact-qr { width: 150px; margin-top: 20px; padding: 8px; background: #fff; border: 1px solid var(--line); }
    .contact-qr img { display: block; width: 100%; height: auto; }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field-wide { grid-column: 1 / -1; }
    .field label { color: #32445e; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-width: 0; padding: 12px; border: 1px solid #cbd7e8; border-radius: 3px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 112px; resize: vertical; }
    .contact-form .button { grid-column: 1 / -1; justify-self: start; border: 0; background: var(--blue); color: #fff; }
    .links-row { display: flex; flex-wrap: wrap; gap: 10px 18px; padding: 18px 0; border-top: 1px solid var(--line); }
    .links-row a { color: #40516b; font-size: 13px; }
    .links-row a:hover { color: var(--blue); }
    .site-footer { background: #e8eef7; color: #33445c; }
    .footer-main { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 23px 0; }
    .footer-main p { margin: 0; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 14px; }
    .footer-links a { color: #33445c; font-size: 13px; }
    .copyright { padding: 13px 0; border-top: 1px solid #d1dbea; color: #586a83; font-size: 12px; }
    .floating-tools { position: fixed; z-index: 15; right: 18px; bottom: 20px; display: grid; gap: 8px; }
    .floating-tools a, .floating-tools button { display: grid; width: 46px; height: 46px; place-items: center; border: 1px solid #cbd7e8; border-radius: 4px; background: #fff; color: var(--blue); box-shadow: 0 5px 18px rgba(20,35,61,.12); cursor: pointer; font-size: 12px; font-weight: 750; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: none; }
    @media (max-width: 900px) {
      .menu-toggle { display: inline-grid; place-items: center; }
      .nav-row { position: relative; }
      .nav-links { display: none; position: absolute; top: calc(100% - 1px); left: 0; right: 0; align-items: stretch; padding: 10px; background: #fff; border: 1px solid var(--line); box-shadow: 0 12px 24px rgba(20,35,61,.1); }
      .nav-links.is-open { display: grid; grid-template-columns: repeat(2, 1fr); }
      .nav-links a { white-space: normal; }
      .nav-links .nav-cta { margin: 0; }
      .intro-grid, .contact-grid { grid-template-columns: 1fr; gap: 28px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .articles { grid-template-columns: repeat(3, 1fr); }
      .hero::after { right: -18%; }
    }
    @media (max-width: 620px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .hero-inner { padding-block: 64px 54px; }
      .hero-copy > p { font-size: 16px; }
      .hero::after { width: 240px; height: 240px; top: 30px; right: -35%; }
      .metrics { grid-template-columns: repeat(2, 1fr); }
      .metric { padding: 16px; border-bottom: 1px solid var(--line); }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(3), .metric:nth-child(4) { border-bottom: 0; }
      .section { padding: 56px 0; }
      .section-head { display: block; }
      .section-head .text-link { display: inline-block; margin-top: 14px; }
      .capability-list, .service-grid, .solution-grid, .review-grid, .case-grid, .price-grid { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; }
      .step:nth-child(2) { border-right: 0; }
      .step:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      .articles { grid-template-columns: 1fr 1fr; }
      .score-row { align-items: flex-start; flex-direction: column; gap: 6px; }
      .contact-form { grid-template-columns: 1fr; }
      .field-wide, .contact-form .button { grid-column: auto; }
      .footer-main { align-items: flex-start; flex-direction: column; }
      .floating-tools { right: 10px; bottom: 12px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
    }