:root {
      color-scheme: light;
      --ink: #172c2a;
      --muted: #586966;
      --paper: #f7f8f5;
      --white: #fff;
      --line: #dce5df;
      --green: #126c59;
      --lime: #d6f06c;
      --coral: #ed765e;
      --blue: #4e87bb;
      --yellow: #f2ca58;
      --max: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; }
    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; top: 0; z-index: 20; background: rgba(247,248,245,.94); border-bottom: 1px solid rgba(220,229,223,.9); backdrop-filter: blur(14px); }
    .nav-wrap { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; text-decoration: none; font-weight: 800; }
    .ai-page-logo { display: block; 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 8px; color: #3b514d; font-size: 13px; text-decoration: none; white-space: nowrap; }
    .nav-links a:hover { color: var(--green); }
    .nav-cta, .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 10px 17px; border: 1px solid var(--green); border-radius: 5px; background: var(--green); color: #fff; text-decoration: none; font-weight: 700; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
    .nav-cta { white-space: nowrap; font-size: 13px; }
    .button:hover, .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(18,108,89,.18); background: #0d5949; }
    .button.secondary { background: transparent; color: var(--ink); border-color: #a9bbb3; }
    .button.secondary:hover { background: #fff; }
    .menu-toggle { display: none; border: 1px solid var(--line); border-radius: 4px; background: #fff; color: var(--ink); padding: 9px 12px; }
    .hero { position: relative; overflow: hidden; padding: 78px 0 58px; background: #eaf3e8; border-bottom: 1px solid #d8e7d8; }
    .hero::before, .hero::after { position: absolute; content: ""; pointer-events: none; border: 1px solid rgba(18,108,89,.16); transform: rotate(35deg); }
    .hero::before { width: 370px; height: 140px; right: -80px; top: 55px; border-radius: 45%; }
    .hero::after { width: 300px; height: 110px; right: 4%; top: 102px; border-radius: 50%; border-color: rgba(237,118,94,.36); }
    .hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(250px, .75fr); gap: 52px; align-items: center; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--green); font-size: 13px; font-weight: 800; }
    .eyebrow::before { content: ""; width: 23px; height: 3px; background: var(--coral); }
    h1 { max-width: 720px; margin: 15px 0 17px; font-size: clamp(38px, 5vw, 62px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 670px; margin: 0; color: #405753; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 27px; }
    .hero-note { margin-top: 18px; color: #526761; font-size: 13px; }
    .hero-panel { padding: 23px; background: rgba(255,255,255,.78); border: 1px solid #d3e0d6; border-radius: 7px; box-shadow: 0 18px 50px rgba(32,73,60,.08); }
    .panel-top { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding-bottom: 16px; border-bottom: 1px solid var(--line); }
    .panel-top strong { font-size: 15px; }
    .live-mark { width: 10px; height: 10px; border-radius: 50%; background: #5baf75; box-shadow: 0 0 0 5px #e1f1df; }
    .quality-row { display: flex; justify-content: space-between; gap: 12px; padding: 13px 0; border-bottom: 1px solid #e9efeb; color: #52635f; font-size: 13px; }
    .quality-row b { color: var(--ink); }
    .quality-row:last-of-type { border: 0; }
    .quality-score { display: flex; align-items: end; gap: 8px; margin-top: 16px; }
    .quality-score strong { color: var(--green); font-size: 40px; line-height: 1; }
    .quality-score span { color: var(--muted); font-size: 12px; }
    .section { padding: 68px 0; }
    .section.tint { background: #eef3ed; border-block: 1px solid #e0e8df; }
    .section-head { display: flex; justify-content: space-between; align-items: end; gap: 28px; margin-bottom: 29px; }
    .section-head h2 { margin: 5px 0 0; font-size: clamp(26px, 3vw, 38px); line-height: 1.2; letter-spacing: 0; }
    .section-head p { max-width: 480px; margin: 0; color: var(--muted); }
    .kicker { color: var(--coral); font-size: 12px; font-weight: 800; text-transform: uppercase; }
    .stats { display: grid; grid-template-columns: repeat(4, 1fr); border-block: 1px solid var(--line); }
    .stat { padding: 23px 20px; border-right: 1px solid var(--line); }
    .stat:last-child { border-right: 0; }
    .stat strong { display: block; color: var(--green); font-size: 27px; }
    .stat span { color: var(--muted); font-size: 13px; }
    .intro-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 54px; align-items: start; }
    .intro-copy { color: var(--muted); }
    .intro-copy p:first-child { margin-top: 0; color: var(--ink); font-size: 18px; }
    .capability-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 25px; border-top: 1px solid var(--line); }
    .capability { display: flex; gap: 13px; padding: 17px 0; border-bottom: 1px solid var(--line); }
    .capability-mark { flex: 0 0 27px; display: grid; place-items: center; width: 27px; height: 27px; border-radius: 50%; background: #d9efc9; color: var(--green); font-weight: 800; }
    .capability b { display: block; font-size: 14px; }
    .capability span { color: var(--muted); font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
    .service { padding: 21px; background: #fff; border: 1px solid var(--line); border-top: 3px solid var(--green); border-radius: 5px; transition: transform .2s ease, box-shadow .2s ease; }
    .service:nth-child(3n+2) { border-top-color: var(--coral); }
    .service:nth-child(3n) { border-top-color: var(--blue); }
    .service:hover, .quote:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(30,64,54,.09); }
    .service h3 { margin: 0 0 7px; font-size: 17px; }
    .service p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-tag { display: inline-block; margin-top: 14px; color: var(--green); font-size: 12px; font-weight: 700; }
    .chips { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 25px; }
    .chips span { padding: 6px 10px; border: 1px solid #cfddd3; border-radius: 3px; background: #f8faf6; color: #405953; font-size: 12px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; }
    .step { position: relative; padding: 19px 22px 18px 0; border-top: 2px solid #bdd1c2; counter-increment: step; }
    .step::before { content: "0" counter(step); display: inline-block; margin-bottom: 14px; color: var(--coral); font-size: 13px; font-weight: 800; }
    .step h3 { margin: 0 0 6px; font-size: 16px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }
    .band { display: grid; grid-template-columns: 1.2fr .8fr; gap: 30px; align-items: center; padding: 28px; background: #173e38; color: #fff; border-radius: 6px; }
    .band h2 { margin: 0 0 8px; font-size: 25px; }
    .band p { margin: 0; color: #d1e2db; }
    .band .button { background: var(--lime); border-color: var(--lime); color: #20372c; justify-self: end; }
    .solution-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0 22px; }
    .solution { padding: 15px 0; border-bottom: 1px solid var(--line); }
    .solution b { display: block; font-size: 14px; }
    .solution span { color: var(--muted); font-size: 12px; }
    .network { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
    .network-item { padding: 18px 0; border-top: 2px solid var(--blue); }
    .network-item:nth-child(2) { border-color: var(--coral); }
    .network-item:nth-child(3) { border-color: var(--green); }
    .network-item h3 { margin: 0 0 5px; font-size: 16px; }
    .network-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .case-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 18px; }
    .case { display: grid; grid-template-columns: 42% 1fr; align-items: center; gap: 21px; overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: 5px; }
    .case-media { aspect-ratio: 4 / 3; overflow: hidden; background: #e7ede4; }
    .case-media img { display: block; width: 100%; height: 100%; object-fit: cover; }
    .case-copy { padding: 18px 18px 18px 0; }
    .case-copy h3 { margin: 0 0 7px; font-size: 18px; }
    .case-copy p { margin: 0; color: var(--muted); font-size: 13px; }
    .case-small { display: block; }
    .case-small .case-media { aspect-ratio: 16 / 8; }
    .case-small .case-copy { padding: 15px 18px 18px; }
    .rating-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 35px; align-items: start; }
    .rating-box { padding: 24px; background: #173e38; color: #fff; border-radius: 5px; }
    .rating-box small { color: #d1e2db; }
    .rating-number { display: block; margin: 8px 0 4px; color: var(--lime); font-size: 58px; font-weight: 800; line-height: 1; }
    .stars { color: #f2ca58; letter-spacing: 0; font-size: 19px; }
    .rating-box p { margin: 13px 0 0; color: #d1e2db; font-size: 13px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; border-collapse: collapse; min-width: 640px; text-align: left; }
    th, td { padding: 13px 14px; border-bottom: 1px solid #e5ece7; font-size: 13px; }
    th { background: #eaf2e8; color: #243e38; }
    td:first-child { font-weight: 700; }
    .good { color: var(--green); font-weight: 700; }
    .compare-note { margin: 11px 0 0; color: var(--muted); font-size: 12px; }
    .quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .quote { padding: 20px; background: #fff; border: 1px solid var(--line); border-radius: 5px; transition: transform .2s ease, box-shadow .2s ease; }
    .quote p { margin: 0 0 16px; color: #40534e; font-size: 14px; }
    .quote strong { display: block; font-size: 13px; }
    .quote span { color: var(--muted); font-size: 12px; }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 17px 35px 17px 0; cursor: pointer; list-style: none; font-weight: 700; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 5px; top: 12px; color: var(--green); font-size: 23px; font-weight: 400; }
    details[open] summary::after { content: "−"; }
    details p { max-width: 820px; margin: -3px 30px 17px 0; color: var(--muted); font-size: 14px; }
    .article-links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 25px; border-top: 1px solid var(--line); }
    .article-links a { display: flex; justify-content: space-between; gap: 12px; padding: 15px 0; border-bottom: 1px solid var(--line); text-decoration: none; font-weight: 700; }
    .article-links a span { color: var(--green); font-size: 12px; white-space: nowrap; }
    .contact-grid { display: grid; grid-template-columns: .7fr 1.3fr; gap: 45px; align-items: start; }
    .contact-info p { color: var(--muted); }
    .contact-info a { color: var(--green); font-weight: 700; }
    .contact-details { margin-top: 22px; padding-top: 15px; border-top: 1px solid var(--line); color: #40534e; font-size: 14px; }
    .contact-form { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid #cbd8d0; border-radius: 4px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 112px; resize: vertical; }
    .contact-form button { justify-self: start; cursor: pointer; }
    .affiliate { padding: 30px; background: #e4efd9; border-left: 4px solid var(--yellow); }
    .affiliate h2 { margin: 0 0 7px; font-size: 24px; }
    .affiliate p { margin: 0 0 17px; max-width: 760px; color: #4d6157; }
    .site-footer { margin-top: 0; padding: 28px 0; background: #e3ebe4; border-top: 1px solid #d2ded5; color: #263e37; }
    .footer-top { display: flex; justify-content: space-between; align-items: start; gap: 25px; }
    .footer-top p { margin: 4px 0; color: #52645c; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; }
    .footer-links a { color: #315b4b; font-size: 13px; text-decoration: none; }
    .copyright { margin-top: 17px; padding-top: 13px; border-top: 1px solid #cad8ce; color: #52645c; font-size: 12px; }
    .floating { position: fixed; z-index: 30; right: 18px; bottom: 20px; display: grid; gap: 8px; }
    .floating a, .floating button { min-width: 48px; min-height: 44px; padding: 9px 12px; border: 1px solid #bdd0c4; border-radius: 4px; background: #fff; color: var(--green); text-align: center; text-decoration: none; font-size: 12px; font-weight: 700; box-shadow: 0 5px 18px rgba(27,63,51,.12); cursor: pointer; }
    .floating .top-button { display: none; }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.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: 980px) {
      .nav-wrap { flex-wrap: wrap; padding: 12px 0; }
      .nav-links { order: 3; width: 100%; justify-content: flex-start; }
      .nav-links a { padding-inline: 7px; }
      .hero-grid { gap: 28px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .solution-list { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 680px) {
      .container { width: min(var(--max), calc(100% - 30px)); }
      .site-header { position: relative; }
      .nav-wrap { min-height: 64px; flex-wrap: nowrap; }
      .menu-toggle { display: inline-block; margin-left: auto; }
      .nav-cta { padding: 8px 10px; font-size: 12px; }
      .nav-links { display: none; order: initial; position: absolute; top: 63px; left: 0; right: 0; width: auto; padding: 10px 15px 14px; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 10px 15px rgba(23,44,42,.08); }
      .nav-links.open { display: grid; grid-template-columns: repeat(2, 1fr); }
      .nav-links a { padding: 9px 5px; }
      .hero { padding: 53px 0 40px; }
      .hero-grid, .intro-grid, .rating-layout, .contact-grid { grid-template-columns: 1fr; }
      .hero-grid { gap: 25px; }
      .hero::before { right: -200px; }
      .hero::after { right: -130px; }
      .hero-copy { font-size: 15px; }
      .section { padding: 48px 0; }
      .section-head { display: block; }
      .section-head p { margin-top: 12px; }
      .stats { grid-template-columns: repeat(2, 1fr); }
      .stat:nth-child(2) { border-right: 0; }
      .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      .capability-list, .service-grid, .network, .quotes, .article-links { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: repeat(2, 1fr); gap: 0 18px; }
      .band { grid-template-columns: 1fr; padding: 23px; }
      .band .button { justify-self: start; }
      .solution-list { grid-template-columns: repeat(2, 1fr); gap: 0 15px; }
      .case-grid { grid-template-columns: 1fr; }
      .case { grid-template-columns: 1fr; }
      .case-media { aspect-ratio: 16 / 9; }
      .case-copy { padding: 0 16px 17px; }
      .footer-top { flex-direction: column; }
      .contact-form { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
    }