:root {
      color-scheme: light;
      --ink: #202b2b;
      --muted: #586766;
      --paper: #f6f8f5;
      --white: #fff;
      --line: #dce5df;
      --green: #147d68;
      --green-dark: #0e594c;
      --coral: #ec745e;
      --yellow: #f0c94e;
      --blue: #5b8ed5;
      --lilac: #9d82c9;
      --shadow: 0 12px 34px rgba(35, 67, 58, .09);
      --max: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background:
        linear-gradient(180deg, #f7faf6 0%, #f3f8f4 43%, #f7f8f5 100%);
      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%; }
    .container { width: min(var(--max), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(247, 250, 246, .94);
      border-bottom: 1px solid rgba(205, 220, 211, .85);
      backdrop-filter: blur(14px);
    }
    .header-inner {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }
    .brand { display: inline-flex; align-items: center; gap: 11px; flex: 0 0 auto; }
    .ai-page-logo { display: block; width: 42px; height: 42px; object-fit: contain; }
    .brand-name { display: grid; line-height: 1.2; font-weight: 750; }
    .brand-name small { color: var(--muted); font-size: 10px; font-weight: 600; margin-top: 4px; }
    .nav-area { display: flex; align-items: center; gap: 18px; }
    .nav-links { display: flex; align-items: center; gap: 0; }
    .nav-links a { padding: 10px 11px; color: #40504e; font-size: 13px; font-weight: 600; white-space: nowrap; }
    .nav-links a:hover, .nav-links a:focus-visible { color: var(--green); }
    .nav-actions { display: flex; align-items: center; gap: 9px; }
    .button {
      min-height: 43px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 17px;
      border: 1px solid transparent;
      border-radius: 5px;
      color: #fff;
      background: var(--green);
      font-weight: 700;
      cursor: pointer;
      transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    }
    .button:hover { transform: translateY(-2px); background: var(--green-dark); box-shadow: 0 8px 18px rgba(20,125,104,.18); }
    .button.secondary { color: var(--ink); background: #fff; border-color: var(--line); }
    .button.secondary:hover { color: var(--green); background: #f0f7f3; }
    .button.coral { background: var(--coral); }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 5px; background: #fff; color: var(--ink); cursor: pointer; }
    main { overflow: hidden; }
    section { scroll-margin-top: 92px; }
    .hero {
      position: relative;
      padding: 62px 0 50px;
      overflow: hidden;
      background:
        linear-gradient(115deg, rgba(211,239,224,.72), rgba(246,248,245,.28) 44%, rgba(255,229,204,.42)),
        #eff6f0;
      border-bottom: 1px solid #dce9df;
    }
    .hero::before, .hero::after { content: ""; position: absolute; pointer-events: none; }
    .hero::before {
      width: 380px; height: 380px; border: 1px solid rgba(20,125,104,.17);
      border-radius: 50%; right: -130px; top: -175px;
      box-shadow: 0 0 0 34px rgba(20,125,104,.035), 0 0 0 70px rgba(20,125,104,.025);
      animation: orbit 18s linear infinite;
    }
    .hero::after {
      width: 120px; height: 120px; right: 15%; bottom: -80px;
      background: rgba(240,201,78,.38); border-radius: 24px; transform: rotate(32deg);
    }
    .hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(260px, .75fr); align-items: center; gap: 48px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 8px; margin: 0 0 16px; color: var(--green-dark); font-size: 13px; font-weight: 750; }
    .eyebrow::before { content: ""; width: 24px; height: 3px; border-radius: 2px; background: var(--coral); }
    h1 { max-width: 690px; margin: 0; font-size: clamp(38px, 5vw, 62px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 650px; margin: 19px 0 24px; color: #465957; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 11px; }
    .hero-notes { display: flex; flex-wrap: wrap; gap: 9px 18px; margin-top: 20px; color: #4e625e; font-size: 13px; }
    .hero-notes span::before { content: "✓"; margin-right: 7px; color: var(--green); font-weight: 800; }
    .hero-panel { position: relative; padding: 24px; border: 1px solid rgba(157,184,165,.65); border-radius: 8px; background: rgba(255,255,255,.88); box-shadow: var(--shadow); }
    .hero-panel h2 { margin: 0 0 5px; font-size: 17px; }
    .hero-panel > p { margin: 0 0 18px; color: var(--muted); font-size: 13px; }
    .model-list { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-list span { padding: 6px 10px; border-radius: 3px; color: #263c37; background: #edf5ef; font-size: 12px; font-weight: 650; }
    .model-list span:nth-child(4n+2) { background: #fff1e9; }
    .model-list span:nth-child(4n+3) { background: #eef2fa; }
    .model-list span:nth-child(4n) { background: #fbf4d9; }
    .hero-panel-foot { display: flex; justify-content: space-between; gap: 12px; margin-top: 19px; padding-top: 14px; border-top: 1px solid var(--line); color: var(--muted); font-size: 12px; }
    .hero-panel-foot strong { color: var(--green-dark); }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.68); }
    .metric { padding: 22px 18px; text-align: center; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; color: var(--green-dark); font-size: 22px; line-height: 1.3; }
    .metric span { color: var(--muted); font-size: 12px; }
    .section { padding: 72px 0; }
    .section.tint { background: rgba(231,241,233,.62); border-block: 1px solid #e0eae2; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 28px; }
    .section-head h2 { margin: 0; font-size: 31px; line-height: 1.25; }
    .section-head p { max-width: 610px; margin: 10px 0 0; color: var(--muted); }
    .section-kicker { margin: 0 0 7px; color: var(--green); font-size: 12px; font-weight: 800; }
    .intro-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: start; gap: 38px; }
    .intro-copy { max-width: 660px; }
    .intro-copy p { margin: 0 0 14px; color: #4b5b59; }
    .intro-copy strong { color: var(--ink); }
    .intro-aside { padding: 21px 22px; border-left: 4px solid var(--coral); background: #fff; box-shadow: 0 7px 20px rgba(35,67,58,.05); }
    .intro-aside h3 { margin: 0 0 8px; font-size: 16px; }
    .intro-aside p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .service { min-height: 174px; padding: 20px; background: #fff; border: 1px solid var(--line); border-radius: 5px; transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease; }
    .service:hover { transform: translateY(-4px); border-color: #a9cbb8; box-shadow: var(--shadow); }
    .service-top { display: flex; align-items: center; gap: 12px; margin-bottom: 11px; }
    .service-mark { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 4px; color: var(--green-dark); background: #e5f1e9; font-weight: 800; }
    .service:nth-child(3n+2) .service-mark { background: #fff0e9; color: #a74c39; }
    .service:nth-child(3n) .service-mark { background: #f9f1d8; color: #796114; }
    .service h3 { margin: 0; font-size: 16px; }
    .service p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-labels { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 13px; }
    .service-labels span { color: #52635f; font-size: 11px; }
    .service-labels span + span::before { content: "·"; margin-right: 6px; color: var(--coral); }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid #bdd2c4; }
    .step { position: relative; padding: 22px 20px 0 0; }
    .step::before { content: ""; position: absolute; top: -6px; left: 0; width: 11px; height: 11px; border: 2px solid var(--green); border-radius: 50%; background: var(--paper); }
    .step small { color: var(--coral); font-size: 12px; font-weight: 800; }
    .step h3 { margin: 6px 0; font-size: 17px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }
    .solution-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 36px; }
    .solution-item { display: grid; grid-template-columns: 38px 1fr; gap: 13px; padding: 18px 0; border-bottom: 1px solid var(--line); }
    .solution-icon { width: 34px; height: 34px; display: grid; place-items: center; border-radius: 4px; background: #e7f0e8; color: var(--green-dark); font-weight: 800; }
    .solution-item h3 { margin: 0 0 4px; font-size: 15px; }
    .solution-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .network { display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 34px; }
    .network-copy p { color: var(--muted); }
    .network-copy h2 { margin: 0 0 12px; font-size: 30px; }
    .network-points { display: grid; grid-template-columns: 1fr 1fr; gap: 10px 18px; margin-top: 22px; }
    .network-points span { padding: 11px 12px; border-left: 3px solid var(--yellow); background: rgba(255,255,255,.74); color: #41524f; font-size: 13px; }
    .network-tags { display: flex; flex-wrap: wrap; gap: 8px; align-content: center; padding: 20px; border: 1px solid var(--line); background: #fff; }
    .network-tags span { padding: 8px 11px; color: #334540; background: #eef4ef; font-size: 13px; }
    .network-tags span:nth-child(3n) { background: #fff1e8; }
    .network-tags span:nth-child(3n+1) { background: #f8f1d9; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .case { overflow: hidden; border: 1px solid var(--line); background: #fff; border-radius: 5px; }
    .case .media { aspect-ratio: 16 / 9; background: #e6ede7; overflow: hidden; }
    .case .media img { display: block; width: 100%; height: 100%; object-fit: cover; }
    .case-copy { padding: 16px; }
    .case-copy small { color: var(--green); font-weight: 750; }
    .case-copy h3 { margin: 5px 0; font-size: 16px; }
    .case-copy p { margin: 0; color: var(--muted); font-size: 13px; }
    .rating-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 26px; align-items: start; }
    .rating-summary { padding: 25px; color: var(--ink); background: #fff; border-top: 4px solid var(--coral); box-shadow: var(--shadow); }
    .rating-summary h3 { margin: 0 0 4px; font-size: 18px; }
    .rating-number { margin: 8px 0 2px; color: var(--green-dark); font-size: 56px; font-weight: 800; line-height: 1; }
    .rating-number small { color: var(--muted); font-size: 17px; font-weight: 600; }
    .stars { color: #d49b10; letter-spacing: 0; font-size: 24px; }
    .rating-summary p { margin: 12px 0 0; color: var(--muted); font-size: 13px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; min-width: 640px; border-collapse: collapse; text-align: left; }
    th, td { padding: 12px 14px; border-bottom: 1px solid #e5ebe6; font-size: 13px; vertical-align: top; }
    th { color: #263c37; background: #eaf3ec; font-weight: 750; }
    td:first-child { font-weight: 700; color: #3b4d49; }
    tbody tr:last-child td { border-bottom: 0; }
    .positive { color: var(--green-dark); font-weight: 700; }
    .note { margin: 10px 0 0; color: var(--muted); font-size: 12px; }
    .testimonial-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .quote { padding: 19px; border: 1px solid var(--line); background: rgba(255,255,255,.8); }
    .quote p { margin: 0 0 15px; color: #42534f; font-size: 14px; }
    .quote footer { display: flex; align-items: center; gap: 9px; color: var(--muted); font-size: 12px; }
    .quote footer::before { content: ""; width: 24px; height: 2px; background: var(--coral); }
    .quote strong { display: block; color: var(--ink); font-size: 13px; }
    .compare { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; align-items: start; }
    .compare-column h3 { margin: 0 0 11px; font-size: 18px; }
    .compare-list { margin: 0; padding: 0; list-style: none; }
    .compare-list li { padding: 10px 0; border-bottom: 1px solid var(--line); color: #4b5b58; font-size: 14px; }
    .compare-list li::before { content: "✓"; margin-right: 9px; color: var(--green); font-weight: 800; }
    .compare-list.limit li::before { content: "•"; color: var(--coral); }
    .token-band { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 24px; padding: 24px 27px; border: 1px solid #cfe0d3; background: #fff; }
    .token-band h2 { margin: 0 0 6px; font-size: 23px; }
    .token-band p { margin: 0; color: var(--muted); font-size: 14px; }
    .token-steps { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 15px; }
    .token-steps span { padding: 6px 10px; background: #edf4ef; color: #41534e; font-size: 12px; }
    .faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 9px 14px; align-items: start; }
    details { border: 1px solid var(--line); background: #fff; }
    summary { position: relative; padding: 15px 40px 15px 16px; cursor: pointer; font-weight: 700; font-size: 14px; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 16px; top: 11px; color: var(--green); font-size: 21px; font-weight: 500; }
    details[open] summary::after { content: "−"; }
    details p { margin: 0; padding: 0 16px 15px; color: var(--muted); font-size: 13px; }
    .article-list { display: grid; grid-template-columns: repeat(5, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .article-list a { min-height: 100px; display: flex; flex-direction: column; justify-content: space-between; padding: 15px; border-right: 1px solid var(--line); background: rgba(255,255,255,.6); transition: background .2s ease; }
    .article-list a:last-child { border-right: 0; }
    .article-list a:hover { background: #eaf3ec; }
    .article-list strong { color: #334541; font-size: 14px; }
    .article-list span { color: var(--green); font-size: 12px; }
    .contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 34px; align-items: start; }
    .contact-copy h2 { margin: 0 0 10px; font-size: 30px; }
    .contact-copy > p { color: var(--muted); }
    .contact-details { display: grid; gap: 12px; margin-top: 22px; }
    .contact-details div { display: flex; flex-wrap: wrap; gap: 7px; font-size: 14px; }
    .contact-details strong { min-width: 98px; color: #344743; }
    .contact-details a { color: var(--green-dark); text-decoration: underline; text-underline-offset: 3px; }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 13px; padding: 22px; border: 1px solid var(--line); background: #fff; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { color: #40504d; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; padding: 11px 12px; border: 1px solid #cfdad2; border-radius: 3px; color: var(--ink); background: #fff; outline: none; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(20,125,104,.1); }
    .field textarea { min-height: 112px; resize: vertical; }
    .form-submit { grid-column: 1 / -1; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; }
    .form-submit small { color: var(--muted); font-size: 12px; }
    .join-band { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 28px; padding: 20px 22px; background: #e8f1e9; }
    .join-band h3 { margin: 0 0 4px; font-size: 17px; }
    .join-band p { margin: 0; color: var(--muted); font-size: 13px; }
    .site-footer { padding: 25px 0; color: #344541; background: #e9f0ea; border-top: 1px solid #d3e0d5; }
    .footer-top { display: flex; justify-content: space-between; align-items: center; gap: 20px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 7px 17px; font-size: 12px; }
    .footer-links a { color: #39554b; text-decoration: underline; text-underline-offset: 3px; }
    .copyright { margin: 13px 0 0; padding-top: 12px; border-top: 1px solid #d2ddd4; color: #52635e; font-size: 12px; }
    .float-tools { position: fixed; right: 16px; bottom: 18px; z-index: 15; display: grid; gap: 8px; }
    .float-tools a, .float-tools button { width: 46px; height: 46px; display: grid; place-items: center; border: 1px solid #cddbd0; border-radius: 4px; color: var(--green-dark); background: #fff; box-shadow: 0 6px 18px rgba(35,67,58,.12); font-size: 12px; font-weight: 750; cursor: pointer; }
    .float-tools button { display: none; }
    .reveal { opacity: 0; transform: translateY(15px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @keyframes orbit { to { transform: rotate(360deg); } }
    @media (max-width: 980px) {
      .nav-links a { padding-inline: 7px; font-size: 12px; }
      .nav-actions .button.secondary { display: none; }
      .hero-inner { gap: 28px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .article-list { grid-template-columns: repeat(3, 1fr); }
      .article-list a:nth-child(3) { border-right: 0; }
      .article-list a:nth-child(n+4) { border-top: 1px solid var(--line); }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--max), calc(100% - 30px)); }
      .header-inner { min-height: 66px; gap: 10px; }
      .ai-page-logo { width: 36px; height: 36px; }
      .brand-name small { display: none; }
      .menu-toggle { display: grid; place-items: center; }
      .nav-area { position: absolute; top: 66px; left: 0; right: 0; display: none; align-items: stretch; gap: 12px; padding: 13px 15px 17px; border-bottom: 1px solid var(--line); background: #f7faf6; box-shadow: 0 12px 18px rgba(35,67,58,.08); }
      .nav-area.open { display: flex; flex-direction: column; }
      .nav-links { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; }
      .nav-links a { padding: 9px 7px; border-bottom: 1px solid #e5ece6; font-size: 13px; }
      .nav-actions { display: grid; grid-template-columns: 1fr 1fr; }
      .nav-actions .button.secondary { display: inline-flex; }
      .hero { padding: 44px 0 30px; }
      .hero-inner { grid-template-columns: 1fr; gap: 25px; }
      h1 { font-size: 42px; }
      .hero-copy { font-size: 15px; }
      .hero-panel { max-width: 100%; }
      .metrics { grid-template-columns: 1fr 1fr; }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(n+3) { border-top: 1px solid var(--line); }
      .section { padding: 52px 0; }
      .section-head { display: block; }
      .section-head h2, .network-copy h2, .contact-copy h2 { font-size: 27px; }
      .intro-grid, .network, .rating-layout, .compare, .contact-grid { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; row-gap: 22px; }
      .solution-grid { grid-template-columns: 1fr; }
      .case-grid, .testimonial-grid { grid-template-columns: 1fr 1fr; }
      .faq-list { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .article-list a { min-height: 90px; border-top: 1px solid var(--line); }
      .article-list a:nth-child(odd) { border-right: 1px solid var(--line); }
      .article-list a:nth-child(even) { border-right: 0; }
      .article-list a:first-child, .article-list a:nth-child(2) { border-top: 0; }
      .token-band { grid-template-columns: 1fr; }
      .footer-top { align-items: flex-start; flex-direction: column; }
    }
    @media (max-width: 480px) {
      .brand-name { font-size: 14px; }
      .nav-links { grid-template-columns: repeat(2, 1fr); }
      h1 { font-size: 36px; }
      .hero-actions .button { flex: 1 1 100%; }
      .hero-notes { gap: 8px 12px; }
      .service-grid, .case-grid, .testimonial-grid { grid-template-columns: 1fr; }
      .service { min-height: 0; }
      .workflow { grid-template-columns: 1fr; }
      .network-points { grid-template-columns: 1fr; }
      .contact-form { grid-template-columns: 1fr; padding: 16px; }
      .field.full, .form-submit { grid-column: auto; }
      .join-band { align-items: flex-start; flex-direction: column; }
      .article-list { grid-template-columns: 1fr; }
      .article-list a, .article-list a:nth-child(n) { min-height: 76px; border-right: 0; border-top: 1px solid var(--line); }
      .article-list a:first-child { border-top: 0; }
      .float-tools { right: 10px; bottom: 12px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }