:root {
      color-scheme: light;
      --ink: #17231d;
      --muted: #56645a;
      --green: #3f9b45;
      --green-dark: #267634;
      --mint: #e8f4e5;
      --line: #dce5da;
      --paper: #f5f8f3;
      --white: #fff;
      --amber: #f0b545;
      --max: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 84px; }
    body { margin: 0; background: var(--paper); color: var(--ink); font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif; line-height: 1.65; }
    img { max-width: 100%; height: auto; }
    a { color: inherit; }
    .container { width: min(var(--max), calc(100% - 40px)); margin-inline: auto; }
    .site-header { position: sticky; top: 0; z-index: 20; background: rgba(250,252,248,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
    .nav-row { min-height: 70px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { width: 38px; 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: 9px 11px; color: #3b4a40; font-size: 13px; text-decoration: none; border-radius: 5px; }
    .nav-links a:hover { color: var(--green-dark); background: var(--mint); }
    .nav-cta { margin-left: 8px; padding: 10px 16px !important; color: #fff !important; background: var(--green-dark); font-weight: 700; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: #fff; border-radius: 5px; padding: 8px 12px; color: var(--ink); font: inherit; }
    .hero { position: relative; overflow: hidden; padding: 76px 0 56px; background: #eaf5e7; border-bottom: 1px solid #d7e9d1; }
    .hero::before { position: absolute; inset: 0; content: ""; pointer-events: none; opacity: .32; background-image: linear-gradient(rgba(54,130,57,.09) 1px, transparent 1px), linear-gradient(90deg, rgba(54,130,57,.09) 1px, transparent 1px); background-size: 38px 38px; mask-image: linear-gradient(to right, #000, transparent 72%); }
    .hero-inner { position: relative; display: grid; grid-template-columns: 1.35fr .65fr; align-items: center; gap: 50px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--green-dark); font-size: 13px; font-weight: 800; letter-spacing: 0; }
    .eyebrow::before { width: 22px; height: 2px; background: var(--green); content: ""; }
    h1 { max-width: 720px; margin: 15px 0 18px; font-size: clamp(38px, 5.2vw, 62px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 650px; margin: 0; color: #425249; font-size: 17px; }
    .actions { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-top: 27px; }
    .button { display: inline-flex; align-items: center; justify-content: center; min-height: 46px; padding: 0 19px; border: 1px solid var(--green-dark); border-radius: 5px; background: var(--green-dark); color: #fff; font: inherit; font-weight: 750; text-decoration: none; transition: transform .2s, box-shadow .2s, background .2s; }
    .button:hover { transform: translateY(-2px); box-shadow: 0 8px 18px rgba(38,118,52,.18); background: #1f682c; }
    .button.secondary { color: var(--green-dark); background: rgba(255,255,255,.65); }
    .button.secondary:hover { background: #fff; }
    .hero-mark { display: grid; place-items: center; min-height: 240px; position: relative; }
    .signal { width: min(250px, 70vw); aspect-ratio: 1; border: 1px solid rgba(38,118,52,.25); border-radius: 50%; display: grid; place-items: center; animation: breathe 5s ease-in-out infinite; }
    .signal::before, .signal::after { position: absolute; content: ""; width: 76%; aspect-ratio: 1; border: 1px solid rgba(38,118,52,.2); border-radius: 50%; }
    .signal::after { width: 52%; }
    .signal-core { display: grid; place-items: center; width: 96px; aspect-ratio: 1; border-radius: 24px; color: #fff; background: var(--green-dark); font-size: 23px; font-weight: 850; box-shadow: 0 12px 30px rgba(38,118,52,.2); transform: rotate(-6deg); }
    .signal-dot { position: absolute; width: 12px; height: 12px; border-radius: 50%; background: var(--amber); box-shadow: 0 0 0 7px rgba(240,181,69,.16); }
    .signal-dot.one { top: 17%; right: 22%; }
    .signal-dot.two { bottom: 19%; left: 19%; width: 8px; height: 8px; background: var(--green); }
    .hero-strip { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 52px; border-top: 1px solid #ccdfc8; }
    .metric { padding: 19px 18px 0 0; }
    .metric strong { display: block; color: var(--green-dark); font-size: 19px; }
    .metric span { color: var(--muted); font-size: 13px; }
    main { overflow: hidden; }
    .section { padding: 74px 0; }
    .section.alt { background: #edf4eb; border-block: 1px solid #e0e9dd; }
    .section-heading { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 29px; }
    .section-heading h2 { margin: 7px 0 0; font-size: 32px; line-height: 1.2; letter-spacing: 0; }
    .section-heading p { max-width: 560px; margin: 0; color: var(--muted); }
    .intro-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 46px; align-items: start; }
    .intro-layout h2 { margin: 8px 0 16px; font-size: 32px; line-height: 1.25; }
    .intro-layout p { color: var(--muted); }
    .capability-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 24px; margin: 0; padding: 0; list-style: none; }
    .capability-list li { padding: 15px 0; border-bottom: 1px solid var(--line); }
    .capability-list strong { display: block; margin-bottom: 3px; }
    .capability-list span { color: var(--muted); font-size: 14px; }
    .service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
    .service { min-height: 170px; padding: 20px; background: var(--white); border: 1px solid var(--line); border-top: 3px solid var(--green); transition: transform .2s, box-shadow .2s; }
    .service:hover, .review:hover { transform: translateY(-4px); box-shadow: 0 12px 26px rgba(31,64,39,.09); }
    .service .index { color: var(--green-dark); font-size: 12px; font-weight: 800; }
    .service h3 { margin: 10px 0 7px; font-size: 17px; }
    .service p { margin: 0; color: var(--muted); font-size: 13px; }
    .tool-cloud { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 24px; }
    .tool-cloud span { padding: 7px 11px; color: #304938; background: #fff; border: 1px solid #d8e4d5; border-radius: 4px; font-size: 13px; }
    .flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: steps; }
    .flow article { position: relative; padding: 18px 0 0; border-top: 2px solid var(--green); counter-increment: steps; }
    .flow article::before { content: "0" counter(steps); color: var(--green-dark); font-weight: 850; font-size: 13px; }
    .flow h3 { margin: 9px 0 6px; font-size: 17px; }
    .flow p { margin: 0; color: var(--muted); font-size: 14px; }
    .split { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: center; }
    .split h2 { font-size: 31px; line-height: 1.25; margin: 8px 0 14px; }
    .split p { color: var(--muted); }
    .check-list { padding: 0; margin: 20px 0 0; list-style: none; display: grid; gap: 11px; }
    .check-list li::before { content: "✓"; display: inline-grid; place-items: center; width: 21px; height: 21px; margin-right: 9px; color: #fff; background: var(--green-dark); border-radius: 50%; font-size: 12px; font-weight: 800; }
    .compare-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; min-width: 700px; border-collapse: collapse; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { color: #fff; background: #285f35; font-size: 14px; }
    td { font-size: 14px; }
    tbody tr:last-child td { border-bottom: 0; }
    .rating { display: flex; flex-wrap: wrap; align-items: center; gap: 13px; margin: 0 0 20px; }
    .rating strong { color: var(--green-dark); font-size: 30px; }
    .stars { color: #bd861a; letter-spacing: 0; }
    .rating small { color: var(--muted); }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { padding: 19px; border: 1px solid var(--line); background: #fff; transition: transform .2s, box-shadow .2s; }
    .review p { margin: 0 0 15px; color: #39473e; font-size: 14px; }
    .review strong { font-size: 13px; }
    .review span { display: block; color: var(--muted); font-size: 12px; }
    .media-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .media-item { margin: 0; background: #fff; border: 1px solid var(--line); }
    .media-item img { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
    .media-item figcaption { padding: 12px 15px; font-weight: 700; }
    .article-links, .friends { display: flex; flex-wrap: wrap; gap: 10px 18px; padding: 0; margin: 18px 0 0; list-style: none; }
    .article-links a, .friends a { color: var(--green-dark); text-decoration-thickness: 1px; text-underline-offset: 3px; }
    .article-links a:hover, .friends a:hover { color: #174d25; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { position: relative; padding: 17px 38px 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(--green-dark); font-size: 22px; transition: transform .2s; }
    .faq-item[open] summary::after { transform: rotate(45deg); }
    .faq-item p { max-width: 850px; margin: 0; padding: 0 32px 17px 0; color: var(--muted); }
    .contact-grid { display: grid; grid-template-columns: 1fr .8fr; gap: 42px; align-items: start; }
    .contact-grid h2 { margin: 8px 0 10px; font-size: 32px; }
    .contact-info { color: var(--muted); }
    .contact-info a { color: var(--green-dark); }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 13px; padding: 22px; background: #fff; border: 1px solid var(--line); }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    label { font-size: 13px; font-weight: 700; }
    input, select, textarea { width: 100%; border: 1px solid #cbd8c9; border-radius: 4px; padding: 11px 12px; color: var(--ink); background: #fcfdfb; font: inherit; }
    input:focus, select:focus, textarea:focus { outline: 2px solid rgba(63,155,69,.25); border-color: var(--green); }
    textarea { min-height: 112px; resize: vertical; }
    .contact-form button { justify-self: start; cursor: pointer; }
    .qr { width: 132px; margin-top: 12px; border: 1px solid var(--line); }
    .site-footer { color: #34433a; background: #e6eee3; border-top: 1px solid #d3e0d0; }
    .footer-inner { display: flex; justify-content: space-between; align-items: flex-start; gap: 28px; padding: 25px 0; }
    .footer-inner p { margin: 4px 0; color: #56645a; font-size: 13px; }
    .footer-links { max-width: 560px; }
    .footer-links a { color: #315d38; font-size: 13px; }
    .copyright { padding: 12px 0; border-top: 1px solid #d3e0d0; color: #56645a; font-size: 12px; }
    .floating { position: fixed; right: 18px; bottom: 20px; z-index: 15; display: grid; gap: 8px; }
    .floating a { display: grid; place-items: center; min-width: 46px; min-height: 46px; padding: 8px; color: #fff; background: var(--green-dark); border-radius: 5px; text-decoration: none; font-size: 12px; font-weight: 750; box-shadow: 0 4px 14px rgba(0,0,0,.14); }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.visible { opacity: 1; transform: none; }
    @keyframes breathe { 50% { transform: scale(1.035); } }
    @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: 920px) {
      .nav-row { flex-wrap: wrap; padding: 12px 0; }
      .menu-toggle { display: inline-flex; }
      .nav-links { display: none; width: 100%; justify-content: flex-start; padding: 4px 0 8px; }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 8px 10px; }
      .nav-cta { margin-left: 0; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .hero-inner { grid-template-columns: 1fr .55fr; gap: 20px; }
    }
    @media (max-width: 640px) {
      .container { width: min(var(--max), calc(100% - 32px)); }
      .hero { padding: 52px 0 34px; }
      .hero-inner, .intro-layout, .split, .contact-grid { grid-template-columns: 1fr; }
      .hero-mark { min-height: 185px; }
      .signal { width: 175px; }
      .signal-core { width: 76px; border-radius: 19px; font-size: 20px; }
      .hero-strip { grid-template-columns: repeat(2, 1fr); gap: 15px 8px; margin-top: 30px; }
      .metric { padding-top: 14px; }
      .section { padding: 52px 0; }
      .section-heading { display: block; }
      .section-heading h2, .intro-layout h2, .split h2, .contact-grid h2 { font-size: 27px; }
      .section-heading p { margin-top: 12px; }
      .service-grid, .flow { grid-template-columns: 1fr 1fr; gap: 10px; }
      .service { padding: 15px; min-height: 0; }
      .capability-list { grid-template-columns: 1fr; }
      .review-grid { grid-template-columns: 1fr; }
      .media-grid { grid-template-columns: 1fr; }
      .contact-form { grid-template-columns: 1fr; padding: 16px; }
      .field.full { grid-column: auto; }
      .footer-inner { flex-direction: column; }
      .floating { right: 10px; bottom: 12px; }
    }