:root {
      color-scheme: light;
      --ink: #1c2926;
      --muted: #5e6c67;
      --paper: #f7f9f6;
      --white: #fff;
      --line: #dce5de;
      --green: #176b55;
      --green-dark: #104b3d;
      --lime: #d8ed78;
      --coral: #e7765b;
      --blue: #dcecf1;
      --shadow: 0 14px 38px rgba(31, 65, 52, .09);
      --container: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    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(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky;
      z-index: 20;
      top: 0;
      background: rgba(247, 249, 246, .94);
      border-bottom: 1px solid rgba(220, 229, 222, .86);
      backdrop-filter: blur(14px);
    }
    .nav-wrap { display: flex; align-items: center; justify-content: space-between; min-height: 72px; gap: 20px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; font-weight: 800; font-size: 19px; }
    .ai-page-logo { display: block; width: 38px; height: 38px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; }
    .nav-links a { color: #40524b; font-size: 13px; padding: 10px 9px; transition: color .2s ease; }
    .nav-links a:hover { color: var(--green); }
    .nav-actions { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
    .menu-toggle {
      display: none; width: 42px; height: 42px; border: 1px solid var(--line);
      border-radius: 8px; background: var(--white); color: var(--ink); cursor: pointer;
    }
    .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 46px; padding: 0 18px; border: 1px solid transparent; border-radius: 6px;
      font-weight: 700; transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .button:hover { transform: translateY(-2px); box-shadow: 0 9px 20px rgba(23, 107, 85, .18); }
    .button-primary { color: #fff; background: var(--green); }
    .button-primary:hover { background: var(--green-dark); }
    .button-outline { color: var(--green-dark); background: #fff; border-color: #bdd2c7; }
    .button-lime { color: #203029; background: var(--lime); }
    .hero {
      position: relative; overflow: hidden; padding: 76px 0 55px;
      background: linear-gradient(135deg, #e4f2e9 0%, #f8f8ec 52%, #e7f0f2 100%);
      border-bottom: 1px solid var(--line);
    }
    .hero::before, .hero::after { position: absolute; content: ""; pointer-events: none; }
    .hero::before {
      width: 390px; height: 390px; right: -100px; top: -160px; border: 1px solid rgba(23, 107, 85, .14);
      border-radius: 50%; box-shadow: 0 0 0 34px rgba(23, 107, 85, .035), 0 0 0 70px rgba(231, 118, 91, .035);
    }
    .hero::after {
      width: 130px; height: 130px; right: 15%; bottom: 18px; border: 1px solid rgba(231, 118, 91, .3);
      transform: rotate(30deg); border-radius: 26px;
    }
    .hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.15fr .85fr; align-items: center; gap: 48px; }
    .eyebrow { color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: .08em; text-transform: uppercase; }
    h1 { max-width: 680px; margin: 15px 0 17px; font-size: clamp(38px, 5vw, 62px); line-height: 1.08; letter-spacing: 0; }
    .hero-copy { max-width: 630px; margin: 0; color: #465a52; font-size: 17px; }
    .hero-buttons { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 27px; }
    .hero-note { margin-top: 15px; color: #53645d; font-size: 13px; }
    .hero-panel { padding: 25px 0 25px 28px; border-left: 1px solid rgba(23, 107, 85, .25); }
    .hero-panel h2 { margin: 0 0 8px; font-size: 20px; }
    .hero-panel p { margin: 0; color: var(--muted); font-size: 14px; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 19px; }
    .model-cloud span { padding: 6px 10px; border: 1px solid #cadbd1; border-radius: 4px; background: rgba(255,255,255,.72); color: #30483e; font-size: 12px; }
    .metric-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 34px; border-top: 1px solid rgba(23, 107, 85, .18); }
    .metric { padding: 17px 14px 0 0; }
    .metric strong { display: block; color: var(--green-dark); font-size: 20px; }
    .metric span { color: var(--muted); font-size: 12px; }
    main { overflow: hidden; }
    .section { padding: 76px 0; }
    .section-tint { background: #eef4ef; border-block: 1px solid #e1e9e1; }
    .section-blue { background: #eaf2f3; border-block: 1px solid #dce8e8; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 30px; }
    .section-head > div { max-width: 720px; }
    .section-kicker { margin-bottom: 8px; color: var(--coral); font-size: 12px; font-weight: 800; letter-spacing: .07em; }
    h2 { margin: 0; font-size: clamp(28px, 3.5vw, 40px); line-height: 1.2; }
    .section-head p { max-width: 540px; margin: 12px 0 0; color: var(--muted); }
    .text-link { color: var(--green); font-weight: 700; white-space: nowrap; }
    .intro-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 50px; align-items: start; }
    .intro-copy { max-width: 460px; color: var(--muted); }
    .intro-copy p { margin: 0 0 14px; }
    .intro-points { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 28px; border-top: 1px solid var(--line); }
    .intro-point { padding: 17px 0; border-bottom: 1px solid var(--line); }
    .intro-point strong { display: block; margin-bottom: 4px; }
    .intro-point span { color: var(--muted); font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
    .service-item { min-height: 168px; padding: 20px; border: 1px solid var(--line); border-radius: 7px; background: #fff; transition: transform .2s ease, box-shadow .2s ease; }
    .service-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
    .service-mark { display: inline-flex; width: 34px; height: 34px; align-items: center; justify-content: center; border-radius: 8px 8px 8px 2px; background: #e2f1e5; color: var(--green); font-size: 15px; font-weight: 800; }
    .service-item:nth-child(3n+2) .service-mark { background: #fbe9df; color: #a94f39; }
    .service-item:nth-child(3n) .service-mark { background: #e5eef3; color: #376575; }
    .service-item h3 { margin: 14px 0 6px; font-size: 16px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: step; }
    .workflow article { position: relative; padding: 3px 18px 0 0; border-top: 2px solid #a9c5b4; counter-increment: step; }
    .workflow article::before { content: "0" counter(step); display: block; margin: 14px 0 10px; color: var(--coral); font-weight: 800; font-size: 13px; }
    .workflow h3 { margin: 0 0 6px; font-size: 17px; }
    .workflow p { margin: 0; color: var(--muted); font-size: 13px; }
    .use-cases { display: grid; grid-template-columns: 1fr 1fr; gap: 0 48px; }
    .use-case { display: grid; grid-template-columns: 135px 1fr; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--line); }
    .use-case strong { color: var(--green-dark); }
    .use-case span { color: var(--muted); font-size: 14px; }
    .network-band { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: center; }
    .network-copy p { max-width: 520px; color: var(--muted); }
    .network-list { display: flex; flex-wrap: wrap; gap: 9px; }
    .network-list span { padding: 8px 12px; border-radius: 4px; background: #fff; border: 1px solid var(--line); color: #385149; font-size: 13px; }
    .rating-panel { display: grid; grid-template-columns: .78fr 1.22fr; gap: 36px; align-items: center; padding: 28px; border: 1px solid #d7e3d8; border-radius: 8px; background: #fff; }
    .rating-score { padding-right: 28px; border-right: 1px solid var(--line); }
    .rating-score strong { display: block; color: var(--green-dark); font-size: 54px; line-height: 1; }
    .rating-score span { color: #a5652f; font-size: 18px; letter-spacing: 2px; }
    .rating-score p { margin: 8px 0 0; color: var(--muted); font-size: 12px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 7px; background: #fff; }
    table { width: 100%; min-width: 650px; border-collapse: collapse; text-align: left; }
    th, td { padding: 13px 15px; border-bottom: 1px solid #e8ede8; font-size: 13px; vertical-align: top; }
    th { color: #31473f; background: #f1f6f1; font-size: 12px; }
    tr:last-child td { border-bottom: 0; }
    td:first-child { font-weight: 700; color: #354a41; }
    .positive { color: var(--green); font-weight: 700; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { padding: 20px; border-top: 3px solid #b7d694; background: #fff; }
    .review:nth-child(2n) { border-color: #eaa08b; }
    .review p { min-height: 74px; margin: 0 0 14px; color: #44574f; font-size: 14px; }
    .review strong { display: block; font-size: 13px; }
    .review span { color: var(--muted); font-size: 12px; }
    .case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
    .case { padding: 24px; border: 1px solid #d7e3dc; border-radius: 7px; background: rgba(255,255,255,.75); }
    .case-label { color: var(--coral); font-size: 12px; font-weight: 800; }
    .case h3 { margin: 8px 0; font-size: 20px; }
    .case p { margin: 0; color: var(--muted); font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .article-link { min-height: 110px; padding: 16px; border: 1px solid var(--line); background: #fff; display: flex; flex-direction: column; justify-content: space-between; }
    .article-link span { color: var(--muted); font-size: 11px; }
    .article-link strong { font-size: 14px; }
    .article-link:hover { border-color: #8cb5a0; }
    .article-feed { margin-top: 16px; color: var(--muted); font-size: 13px; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 17px 2px; cursor: pointer; list-style: none; font-weight: 700; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; color: var(--green); font-size: 22px; font-weight: 400; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { max-width: 860px; margin: -3px 0 18px; color: var(--muted); font-size: 14px; }
    .contact-grid { display: grid; grid-template-columns: 1fr .78fr; gap: 46px; align-items: start; }
    .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: #3e5149; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; border: 1px solid #cfdcd3; border-radius: 5px; padding: 11px 12px; background: #fff; color: var(--ink); outline: none; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(23,107,85,.1); }
    .field textarea { min-height: 112px; resize: vertical; }
    .contact-side { padding-left: 26px; border-left: 1px solid var(--line); }
    .contact-side h3 { margin: 0 0 9px; }
    .contact-side p { margin: 6px 0; color: var(--muted); font-size: 14px; }
    .contact-side a { color: var(--green-dark); font-weight: 700; }
    .contact-qr { width: 120px; margin-top: 14px; padding: 5px; border: 1px solid var(--line); background: #fff; }
    .footer { padding: 27px 0; background: #e8efea; color: #263a31; border-top: 1px solid #d5e0d7; }
    .footer-top { display: flex; justify-content: space-between; gap: 24px; align-items: flex-start; }
    .footer p { margin: 4px 0; color: #51645b; font-size: 12px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; max-width: 650px; }
    .footer-links a { color: #305a49; font-size: 12px; }
    .footer-bottom { margin-top: 17px; padding-top: 14px; border-top: 1px solid #d4dfd6; color: #5d6e65; font-size: 11px; }
    .floating-contact { position: fixed; z-index: 15; right: 18px; bottom: 20px; display: flex; flex-direction: column; gap: 8px; }
    .floating-contact a { display: grid; width: 46px; height: 46px; place-items: center; border: 1px solid #b8cfc1; border-radius: 50%; background: #fff; color: var(--green-dark); box-shadow: 0 6px 20px rgba(25,55,43,.12); font-size: 11px; font-weight: 800; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-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-links { display: none; position: absolute; top: 72px; left: 0; right: 0; padding: 10px 20px 18px; border-bottom: 1px solid var(--line); background: var(--paper); flex-wrap: wrap; justify-content: flex-start; }
      .nav-links.is-open { display: flex; }
      .nav-links a { padding: 9px 11px; }
      .menu-toggle { display: inline-grid; place-items: center; }
      .nav-actions .button-outline { display: none; }
      .hero-grid { grid-template-columns: 1fr .78fr; gap: 26px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .article-list { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 680px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .nav-wrap { min-height: 64px; }
      .nav-links { top: 64px; }
      .brand { font-size: 17px; }
      .ai-page-logo { width: 34px; height: 34px; }
      .nav-actions { gap: 7px; }
      .nav-actions .button-primary { min-height: 40px; padding: 0 12px; font-size: 12px; }
      .menu-toggle { width: 40px; height: 40px; }
      .hero { padding: 55px 0 38px; }
      .hero-grid { grid-template-columns: 1fr; gap: 27px; }
      h1 { font-size: 42px; }
      .hero-copy { font-size: 15px; }
      .hero-panel { padding: 18px 0 0; border-left: 0; border-top: 1px solid rgba(23,107,85,.25); }
      .metric-strip { grid-template-columns: repeat(2, 1fr); row-gap: 10px; }
      .metric { padding-top: 13px; }
      .section { padding: 54px 0; }
      .section-head { display: block; margin-bottom: 22px; }
      .section-head .text-link { display: inline-block; margin-top: 12px; }
      .intro-layout, .network-band, .rating-panel, .contact-grid { grid-template-columns: 1fr; gap: 24px; }
      .intro-points { gap: 0 15px; }
      .service-grid { grid-template-columns: 1fr 1fr; gap: 9px; }
      .service-item { min-height: 170px; padding: 15px; }
      .workflow { grid-template-columns: 1fr 1fr; gap: 24px 16px; }
      .use-cases { grid-template-columns: 1fr; }
      .use-case { grid-template-columns: 112px 1fr; gap: 10px; }
      .rating-panel { padding: 21px; }
      .rating-score { padding: 0 0 18px; border-right: 0; border-bottom: 1px solid var(--line); }
      .reviews { grid-template-columns: 1fr; gap: 10px; }
      .review p { min-height: 0; }
      .case-grid { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .contact-side { padding: 20px 0 0; border-left: 0; border-top: 1px solid var(--line); }
      .footer-top { flex-direction: column; }
      .floating-contact { right: 12px; bottom: 13px; }
      .floating-contact a { width: 42px; height: 42px; }
    }
    @media (max-width: 380px) {
      .service-grid, .contact-form { grid-template-columns: 1fr; }
      .field-wide { grid-column: auto; }
      .hero-buttons .button { width: 100%; }
    }