:root {
      color-scheme: light;
      --ink: #202322;
      --muted: #626966;
      --paper: #f8f8f6;
      --white: #fff;
      --line: #dfe3df;
      --green: #a8ec59;
      --green-dark: #315d1c;
      --coral: #ff684e;
      --yellow: #ffdc58;
      --blue: #cde9f2;
      --max: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, 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(--max), calc(100% - 40px)); margin-inline: auto; }
    .site-header { position: sticky; z-index: 20; top: 0; background: rgba(248,248,246,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
    .nav-row { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; font-weight: 800; }
    .ai-page-logo { width: 38px; height: auto; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 0; }
    .nav-links a { padding: 8px 9px; color: #404642; font-size: 13px; transition: color .2s ease; }
    .nav-links a:hover { color: #638f27; }
    .nav-cta, .button { display: inline-flex; align-items: center; justify-content: center; gap: 9px; border: 1px solid var(--ink); background: var(--ink); color: white; padding: 12px 19px; font-weight: 700; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
    .nav-cta { flex: 0 0 auto; padding: 10px 15px; font-size: 13px; }
    .button:hover, .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(32,35,34,.16); }
    .button-lime { color: var(--ink); background: var(--green); border-color: var(--green); }
    .button-outline { background: transparent; color: var(--ink); }
    .menu-toggle { display: none; border: 1px solid var(--line); background: white; color: var(--ink); padding: 9px 12px; cursor: pointer; }
    .hero { overflow: hidden; border-bottom: 1px solid var(--line); background: var(--green); }
    .hero-inner { position: relative; padding-block: 76px 58px; }
    .hero-inner::after { content: ""; position: absolute; width: 330px; height: 330px; right: 4%; top: 4%; border: 1px solid rgba(32,35,34,.22); border-radius: 50%; box-shadow: 0 0 0 42px rgba(255,255,255,.12), 0 0 0 84px rgba(255,255,255,.1); pointer-events: none; }
    .hero-copy { position: relative; z-index: 1; max-width: 740px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 20px; font-size: 13px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
    .eyebrow::before { content: ""; width: 24px; height: 3px; background: var(--coral); }
    h1 { max-width: 720px; margin: 0; font-size: clamp(42px, 6vw, 76px); line-height: 1.08; letter-spacing: 0; }
    .hero-copy > p { max-width: 610px; margin: 22px 0 26px; color: #2d3928; font-size: 18px; }
    .button-row { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-note { display: flex; flex-wrap: wrap; gap: 10px 23px; margin-top: 31px; font-size: 13px; font-weight: 700; }
    .hero-note span::before { content: "＋"; margin-right: 7px; color: #426f22; }
    .hero-band { background: var(--ink); color: white; }
    .hero-band-inner { display: grid; grid-template-columns: repeat(4, 1fr); }
    .metric { padding: 22px 18px; border-right: 1px solid #454a47; }
    .metric:last-child { border: 0; }
    .metric strong { display: block; color: var(--green); font-size: 16px; }
    .metric span { display: block; margin-top: 3px; color: #d1d6d2; font-size: 12px; }
    main { overflow: hidden; }
    .section { padding-block: 76px; border-bottom: 1px solid var(--line); }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 30px; margin-bottom: 32px; }
    .section-head > div { max-width: 720px; }
    .kicker { margin: 0 0 8px; color: #608827; font-size: 12px; font-weight: 800; text-transform: uppercase; }
    h2 { margin: 0; font-size: clamp(29px, 4vw, 43px); line-height: 1.18; letter-spacing: 0; }
    .section-head p { max-width: 440px; margin: 0; color: var(--muted); }
    .intro-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 50px; align-items: start; }
    .intro-copy { max-width: 680px; color: #434946; }
    .intro-copy p:first-child { margin-top: 0; }
    .platform-box { padding: 25px; background: var(--blue); border-left: 5px solid #39819a; }
    .platform-box h3 { margin: 0 0 10px; font-size: 19px; }
    .platform-box p { margin: 0; color: #34474b; }
    .pill-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
    .pill { display: inline-flex; padding: 6px 10px; background: white; border: 1px solid rgba(32,35,34,.12); font-size: 12px; font-weight: 700; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
    .service-item { min-height: 174px; padding: 23px; background: var(--white); transition: background .2s ease; }
    .service-item:hover { background: #f2f8e9; }
    .service-item .num { color: #719532; font-size: 12px; font-weight: 800; }
    .service-item h3 { margin: 9px 0 7px; font-size: 18px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .workflows { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 2px solid var(--ink); }
    .workflow { position: relative; padding: 23px 19px 12px 0; }
    .workflow + .workflow { padding-left: 20px; border-left: 1px solid var(--line); }
    .workflow b { display: block; color: var(--coral); font-size: 13px; }
    .workflow h3 { margin: 7px 0; font-size: 17px; }
    .workflow p { margin: 0; color: var(--muted); font-size: 14px; }
    .solution-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 38px; align-items: start; }
    .solution-aside { padding: 25px; background: var(--yellow); }
    .solution-aside h3 { margin: 0 0 10px; font-size: 22px; }
    .solution-aside p { margin: 0; }
    .solution-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 25px; }
    .solution-list div { padding: 15px 0; border-bottom: 1px solid var(--line); }
    .solution-list strong { display: block; font-size: 15px; }
    .solution-list span { color: var(--muted); font-size: 13px; }
    .service-network { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 28px; padding: 26px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .network-item { border-left: 3px solid var(--coral); padding-left: 15px; }
    .network-item h3 { margin: 0 0 7px; font-size: 17px; }
    .network-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .comparison-wrap { display: grid; grid-template-columns: .7fr 1.3fr; gap: 30px; align-items: start; }
    .score-panel { padding: 27px; background: var(--coral); }
    .score-panel .stars { color: #202322; font-size: 22px; letter-spacing: 0; }
    .score-panel strong { display: block; margin-top: 12px; font-size: 58px; line-height: 1; }
    .score-panel span { display: block; margin-top: 8px; font-weight: 700; }
    .score-panel p { margin-bottom: 0; font-size: 14px; }
    .table-scroll { overflow-x: auto; border: 1px solid var(--line); background: white; }
    table { width: 100%; border-collapse: collapse; text-align: left; }
    th, td { padding: 14px 15px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { background: #eef0ec; font-size: 13px; }
    td { font-size: 14px; }
    tbody tr:last-child td { border-bottom: 0; }
    .good { color: #3f741c; font-weight: 800; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .case { background: white; border: 1px solid var(--line); }
    .case figure { margin: 0; aspect-ratio: 16 / 9; overflow: hidden; background: #e9ece8; }
    .case figure img { display: block; width: 100%; height: 100%; object-fit: cover; }
    .case-copy { padding: 18px; }
    .case-copy span { color: #608827; font-size: 12px; font-weight: 800; }
    .case-copy h3 { margin: 6px 0; font-size: 18px; }
    .case-copy p { margin: 0; color: var(--muted); font-size: 14px; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
    .review { padding: 22px; background: white; }
    .review blockquote { margin: 0 0 17px; color: #343a36; }
    .review cite { color: var(--muted); font-size: 13px; font-style: normal; font-weight: 700; }
    .tags { display: flex; flex-wrap: wrap; gap: 10px; }
    .tags span { padding: 10px 13px; border: 1px solid var(--line); background: white; font-size: 14px; }
    .price-note { margin-top: 22px; padding: 18px 20px; background: #fff1e8; border-left: 4px solid var(--coral); color: #51443d; }
    .article-row { display: grid; grid-template-columns: 1fr 1fr; gap: 0 30px; border-top: 1px solid var(--line); }
    .article-row a { display: flex; justify-content: space-between; gap: 15px; padding: 16px 0; border-bottom: 1px solid var(--line); font-weight: 700; }
    .article-row a span { color: #638c30; }
    details { border-bottom: 1px solid var(--line); }
    details:first-child { border-top: 1px solid var(--line); }
    summary { display: flex; justify-content: space-between; gap: 20px; padding: 17px 2px; cursor: pointer; font-weight: 700; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; color: #638c30; font-size: 20px; line-height: 1; }
    details[open] summary::after { content: "−"; }
    details p { max-width: 850px; margin: -3px 0 18px; color: var(--muted); }
    .form-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 45px; align-items: start; }
    .contact-copy { padding: 25px; background: var(--blue); }
    .contact-copy h3 { margin: 0 0 9px; font-size: 21px; }
    .contact-copy p { margin: 7px 0; }
    .contact-copy a { text-decoration: underline; text-underline-offset: 3px; }
    .qr { width: 160px; margin-top: 17px; }
    .qr img { display: block; width: 100%; border: 6px solid white; }
    form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field-wide { grid-column: 1 / -1; }
    label { font-size: 13px; font-weight: 700; }
    input, select, textarea { width: 100%; padding: 12px; color: var(--ink); border: 1px solid #cbd1cc; border-radius: 0; background: white; }
    textarea { min-height: 118px; resize: vertical; }
    input:focus, select:focus, textarea:focus { outline: 2px solid #88c846; outline-offset: 1px; }
    .footer { background: #e9ece7; color: var(--ink); }
    .footer-main { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; padding-block: 27px; }
    .footer p { margin: 0; color: #4f5651; font-size: 13px; }
    .footer-links { display: flex; justify-content: flex-end; align-items: center; flex-wrap: wrap; gap: 8px 18px; }
    .footer-links a { color: #34423a; font-size: 13px; text-decoration: underline; text-underline-offset: 3px; }
    .copyright { padding: 12px 0; border-top: 1px solid #d4d9d3; color: #525a54; font-size: 12px; }
    .float-contact { position: fixed; z-index: 15; right: 18px; bottom: 18px; display: grid; gap: 8px; }
    .float-contact a { padding: 11px 14px; background: var(--ink); color: white; font-size: 13px; font-weight: 700; box-shadow: 0 5px 18px rgba(0,0,0,.15); }
    .float-contact a:first-child { background: var(--coral); color: var(--ink); }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: translateY(0); }
    @media (max-width: 1000px) {
      .nav-row { flex-wrap: wrap; padding-block: 12px; }
      .menu-toggle { display: inline-flex; margin-left: auto; }
      .nav-cta { order: 2; }
      .nav-links { display: none; order: 3; width: 100%; justify-content: flex-start; }
      .nav-links.is-open { display: flex; }
      .nav-links a { padding: 8px 12px 8px 0; }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--max), calc(100% - 30px)); }
      .hero-inner { padding-block: 58px 42px; }
      .hero-inner::after { width: 180px; height: 180px; right: -85px; top: 20px; opacity: .65; }
      .hero-copy > p { font-size: 16px; }
      .hero-band-inner { grid-template-columns: repeat(2, 1fr); }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(-n+2) { border-bottom: 1px solid #454a47; }
      .section { padding-block: 55px; }
      .section-head { display: block; }
      .section-head p { margin-top: 13px; }
      .intro-grid, .solution-layout, .comparison-wrap, .form-layout { grid-template-columns: 1fr; gap: 25px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .workflows { grid-template-columns: repeat(2, 1fr); }
      .workflow:nth-child(3) { border-left: 0; padding-left: 0; }
      .workflow:nth-child(n+3) { border-top: 1px solid var(--line); }
      .service-network { grid-template-columns: 1fr; gap: 18px; }
      .case-grid, .reviews { grid-template-columns: repeat(2, 1fr); }
      .footer-main { grid-template-columns: 1fr; }
      .footer-links { justify-content: flex-start; }
    }
    @media (max-width: 500px) {
      .brand { font-size: 14px; }
      .ai-page-logo { width: 31px; }
      .nav-cta { padding: 9px 11px; }
      .hero-inner::after { display: none; }
      h1 { font-size: 42px; }
      .service-grid, .workflows, .solution-list, .case-grid, .reviews, .article-row { grid-template-columns: 1fr; }
      .workflow + .workflow { padding-left: 0; border-left: 0; border-top: 1px solid var(--line); }
      .workflow { padding-block: 17px; }
      form { grid-template-columns: 1fr; }
      .field-wide { grid-column: auto; }
      .float-contact { right: 10px; bottom: 10px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }