:root {
      color-scheme: light;
      --ink: #18352d;
      --muted: #587068;
      --green: #187654;
      --green-dark: #10583f;
      --mint: #dff5e9;
      --line: #d9e9df;
      --paper: #ffffff;
      --wash: #f3fbf6;
      --lime: #d8ef9d;
      --coral: #ef836c;
      --container: 1180px;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--wash);
      font-family: "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 { display: block; max-width: 100%; height: auto; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(249, 253, 250, .96);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(14px);
    }
    .nav-row {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
    }
    .brand { display: inline-flex; align-items: center; gap: 11px; flex: 0 0 auto; }
    .ai-page-logo { width: 42px; max-width: 100%; height: auto; }
    .brand-name { font-size: 18px; font-weight: 800; letter-spacing: 0; }
    .nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 0;
      flex-wrap: wrap;
      color: #405c52;
      font-size: 13px;
    }
    .nav-links a { padding: 9px 10px; border-radius: 5px; transition: background .2s, color .2s; }
    .nav-links a:hover, .nav-links a:focus-visible { color: var(--green-dark); background: #e6f4eb; }
    .nav-cta {
      display: inline-flex;
      flex: 0 0 auto;
      align-items: center;
      justify-content: center;
      min-height: 42px;
      padding: 0 17px;
      color: #fff;
      background: var(--green);
      border-radius: 5px;
      font-size: 14px;
      font-weight: 700;
      transition: transform .2s, background .2s;
    }
    .nav-cta:hover { background: var(--green-dark); transform: translateY(-2px); }
    .menu-toggle {
      display: none;
      width: 42px;
      height: 42px;
      border: 1px solid var(--line);
      border-radius: 5px;
      background: #fff;
      color: var(--ink);
      cursor: pointer;
    }

    .hero {
      overflow: hidden;
      position: relative;
      padding: 76px 0 58px;
      background: #e9f8ef;
      border-bottom: 1px solid var(--line);
    }
    .hero::before {
      content: "";
      position: absolute;
      width: 360px;
      height: 360px;
      right: max(2%, calc((100% - var(--container)) / 2));
      top: 32px;
      border: 1px solid #b7dec5;
      border-radius: 50%;
      box-shadow: 0 0 0 34px rgba(255,255,255,.25), 0 0 0 70px rgba(255,255,255,.17);
      animation: orbit 24s linear infinite;
      pointer-events: none;
    }
    .hero::after {
      content: "";
      position: absolute;
      right: 14%;
      top: 104px;
      width: 90px;
      height: 90px;
      border-radius: 24px;
      background: var(--lime);
      transform: rotate(24deg);
      opacity: .65;
      pointer-events: none;
    }
    .hero-inner { position: relative; z-index: 1; max-width: 760px; }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 9px;
      color: var(--green-dark);
      font-size: 13px;
      font-weight: 750;
    }
    .eyebrow::before { content: ""; width: 23px; height: 2px; background: var(--coral); }
    h1 { max-width: 700px; margin: 16px 0 18px; font-size: clamp(38px, 5vw, 64px); line-height: 1.13; letter-spacing: 0; }
    .hero-copy { max-width: 620px; margin: 0; color: #456259; font-size: 17px; }
    .hero-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
    .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 48px;
      padding: 0 20px;
      border: 1px solid var(--green);
      border-radius: 5px;
      color: #fff;
      background: var(--green);
      font-weight: 750;
      transition: transform .2s, box-shadow .2s, background .2s;
      cursor: pointer;
    }
    .button:hover { transform: translateY(-2px); box-shadow: 0 8px 18px rgba(24,118,84,.17); background: var(--green-dark); }
    .button.secondary { color: var(--green-dark); background: #fff; border-color: #b9d8c4; }
    .button.secondary:hover { background: #f7fcf8; }
    .hero-note { margin: 15px 0 0; color: #5b756a; font-size: 13px; }
    .hero-stats {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 0;
      margin-top: 55px;
      border-top: 1px solid #c7e3d0;
    }
    .hero-stat { padding: 20px 18px 0 0; }
    .hero-stat strong { display: block; font-size: 18px; }
    .hero-stat span { color: var(--muted); font-size: 13px; }

    main { overflow: clip; }
    .section { padding: 74px 0; }
    .section.alt { background: #eaf7ef; border-block: 1px solid #dceee2; }
    .section.white { background: #fff; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 29px; }
    .section-head > div { max-width: 700px; }
    .kicker { margin: 0 0 7px; color: var(--green); font-size: 12px; font-weight: 800; text-transform: uppercase; }
    h2 { margin: 0; font-size: 32px; line-height: 1.25; letter-spacing: 0; }
    .section-intro { margin: 10px 0 0; max-width: 680px; color: var(--muted); }
    .text-link { color: var(--green-dark); font-weight: 750; white-space: nowrap; }
    .text-link:hover { text-decoration: underline; text-underline-offset: 4px; }

    .intro-layout { display: grid; grid-template-columns: 1.05fr .95fr; gap: 55px; align-items: start; }
    .intro-copy p { margin: 0 0 15px; color: #4b675d; }
    .check-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 20px; margin: 23px 0 0; padding: 0; list-style: none; }
    .check-list li { display: flex; align-items: flex-start; gap: 10px; color: #284c3e; font-size: 14px; }
    .check-list li::before { content: "✓"; display: grid; place-items: center; flex: 0 0 20px; height: 20px; border-radius: 50%; color: var(--green-dark); background: #d8efdf; font-size: 12px; font-weight: 800; }
    .platform-note { padding: 24px 26px; border-left: 3px solid var(--green); background: #f2faf5; }
    .platform-note h3 { margin: 0 0 9px; font-size: 18px; }
    .platform-note p { margin: 0; color: var(--muted); font-size: 14px; }

    .service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 13px; }
    .service-item {
      min-width: 0;
      padding: 18px;
      border: 1px solid var(--line);
      background: #fff;
      transition: transform .22s, border-color .22s, box-shadow .22s;
    }
    .service-item:hover { transform: translateY(-3px); border-color: #9cc9ab; box-shadow: 0 9px 22px rgba(36,93,62,.08); }
    .service-item h3 { margin: 0 0 7px; font-size: 16px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-index { display: block; margin-bottom: 12px; color: #7da78b; font-size: 11px; font-weight: 800; }

    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; }
    .workflow article { position: relative; padding: 0 24px 0 0; counter-increment: step; }
    .workflow article::before { content: "0" counter(step); display: block; margin-bottom: 15px; color: var(--green); font-size: 25px; font-weight: 800; }
    .workflow article:not(:last-child)::after { content: ""; position: absolute; left: 54px; right: 12px; top: 17px; border-top: 1px solid #b7d8c2; }
    .workflow h3 { margin: 0 0 7px; font-size: 16px; }
    .workflow p { margin: 0; color: var(--muted); font-size: 13px; }

    .industry-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 42px; border-top: 1px solid var(--line); }
    .industry-item { display: grid; grid-template-columns: 115px 1fr; gap: 14px; padding: 17px 0; border-bottom: 1px solid var(--line); }
    .industry-item strong { color: var(--green-dark); font-size: 14px; }
    .industry-item span { color: var(--muted); font-size: 13px; }

    .network-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
    .network-copy p { color: var(--muted); }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-cloud span { padding: 7px 11px; border: 1px solid #cfe3d5; border-radius: 3px; color: #315747; background: #fff; font-size: 13px; }
    .network-details { display: grid; gap: 12px; }
    .network-details article { padding: 16px 18px; border-left: 2px solid #77b58c; background: #f9fcfa; }
    .network-details h3 { margin: 0 0 4px; font-size: 15px; }
    .network-details p { margin: 0; color: var(--muted); font-size: 13px; }

    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .case-card { min-width: 0; background: #fff; border: 1px solid var(--line); }
    .case-card .media { aspect-ratio: 16 / 9; overflow: hidden; background: #e8f5ed; }
    .case-card .media.square { aspect-ratio: 4 / 3; }
    .case-card img { width: 100%; height: 100%; object-fit: cover; }
    .case-content { padding: 17px 18px 19px; }
    .case-content span { color: var(--green); font-size: 12px; font-weight: 750; }
    .case-content h3 { margin: 5px 0 7px; font-size: 17px; }
    .case-content p { margin: 0; color: var(--muted); font-size: 13px; }

    .score-panel { display: grid; grid-template-columns: 260px 1fr; gap: 30px; align-items: center; margin-bottom: 24px; padding: 24px; border: 1px solid #cce4d3; background: #f8fcf9; }
    .score-main { padding-right: 26px; border-right: 1px solid var(--line); }
    .score-main strong { display: block; color: var(--green-dark); font-size: 44px; line-height: 1.1; }
    .score-main span { color: var(--muted); font-size: 13px; }
    .stars { margin-top: 8px; color: #dc8b3b; letter-spacing: 0; }
    .score-copy { color: var(--muted); font-size: 14px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; min-width: 760px; border-collapse: collapse; text-align: left; }
    th, td { padding: 13px 15px; border-bottom: 1px solid #e7f0ea; vertical-align: top; font-size: 13px; }
    th { color: #284a3c; background: #eaf6ee; font-size: 13px; }
    td { color: #536d62; }
    tbody tr:last-child td { border-bottom: 0; }
    td:first-child { color: var(--ink); font-weight: 700; }
    .rating { color: var(--green-dark); font-weight: 750; }

    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { padding: 20px; border-top: 2px solid #8ebc9a; background: #fff; }
    .review blockquote { margin: 0; color: #3b5c4d; font-size: 14px; }
    .review footer { margin-top: 14px; color: var(--muted); font-size: 12px; font-weight: 700; }

    .article-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
    .article-list { display: grid; }
    .article-list a { display: flex; justify-content: space-between; gap: 18px; padding: 15px 0; border-bottom: 1px solid var(--line); color: #294d3d; font-weight: 650; }
    .article-list a span { color: var(--green); font-size: 12px; white-space: nowrap; }
    .article-list a:hover { color: var(--green); }
    .encyclopedia { padding: 20px; background: #e7f5eb; }
    .encyclopedia h3 { margin: 0 0 7px; font-size: 18px; }
    .encyclopedia p { margin: 0 0 15px; color: var(--muted); font-size: 14px; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 7px; }
    .tag-cloud span { padding: 6px 9px; background: #fff; color: #406351; font-size: 12px; }

    .faq-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 30px; border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 16px 32px 16px 0; color: #27483a; font-weight: 700; cursor: pointer; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; top: 14px; right: 2px; color: var(--green); font-size: 21px; font-weight: 400; }
    details[open] summary::after { content: "−"; }
    details p { margin: -2px 0 16px; color: var(--muted); font-size: 14px; }

    .contact-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 45px; align-items: start; }
    .contact-copy p { color: var(--muted); }
    .contact-list { display: grid; gap: 9px; margin-top: 23px; color: #315345; font-size: 14px; }
    .contact-list a { color: var(--green-dark); font-weight: 700; }
    .qr-block { display: flex; align-items: center; gap: 15px; margin-top: 22px; }
    .qr-block img { width: 112px; border: 1px solid var(--line); background: white; }
    .qr-block span { max-width: 190px; color: var(--muted); font-size: 12px; }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 22px; border: 1px solid var(--line); background: #fff; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { color: #38594a; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-width: 0; padding: 11px 12px; color: var(--ink); border: 1px solid #d3e4d9; border-radius: 3px; background: #fbfdfb; outline: none; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: #65a980; box-shadow: 0 0 0 3px rgba(83,157,110,.12); }
    .field textarea { min-height: 112px; resize: vertical; }
    .contact-form .button { justify-self: start; }
    .form-note { align-self: center; margin: 0; color: #6a8076; font-size: 12px; }

    .join-strip { display: flex; justify-content: space-between; align-items: center; gap: 24px; padding: 25px 0; border-top: 1px solid var(--line); }
    .join-strip h3 { margin: 0 0 4px; font-size: 20px; }
    .join-strip p { margin: 0; color: var(--muted); font-size: 14px; }
    .friend-links { display: flex; flex-wrap: wrap; gap: 8px 18px; padding: 20px 0; border-top: 1px solid var(--line); }
    .friend-links a { color: #426250; font-size: 13px; }
    .friend-links a:hover { color: var(--green); text-decoration: underline; }

    .site-footer { color: #dcebe1; background: #183c30; }
    .footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 20px 0; }
    .footer-brand { color: #fff; font-weight: 800; }
    .footer-inner p { margin: 0; font-size: 12px; }
    .footer-inner a { color: #e7f3ea; }

    .floating-contact {
      position: fixed;
      z-index: 15;
      right: 18px;
      bottom: 20px;
      display: grid;
      gap: 8px;
    }
    .floating-contact a {
      display: grid;
      place-items: center;
      width: 48px;
      height: 48px;
      border: 1px solid #c4dfcb;
      border-radius: 50%;
      color: var(--green-dark);
      background: #fff;
      box-shadow: 0 5px 18px rgba(25,64,43,.12);
      font-size: 12px;
      font-weight: 800;
      transition: transform .2s;
    }
    .floating-contact a:hover { transform: translateY(-3px); }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: translateY(0); }
    @keyframes orbit { to { transform: rotate(360deg); } }
    @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-row { flex-wrap: wrap; padding: 12px 0; }
      .menu-toggle { display: inline-grid; place-items: center; margin-left: auto; }
      .nav-cta { margin-left: 0; }
      .nav-links { display: none; order: 3; width: 100%; justify-content: flex-start; padding: 8px 0 3px; border-top: 1px solid var(--line); }
      .nav-links.is-open { display: flex; }
      .service-grid { grid-template-columns: repeat(3, 1fr); }
      .hero::before { right: -120px; }
      .hero::after { right: 12%; }
    }
    @media (max-width: 700px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .hero { padding: 58px 0 38px; }
      .hero::before { width: 250px; height: 250px; top: 180px; right: -155px; opacity: .6; }
      .hero::after { width: 50px; height: 50px; top: 205px; right: 16%; }
      .hero-inner { max-width: 100%; }
      h1 { max-width: 520px; font-size: 42px; }
      .hero-copy { max-width: 470px; font-size: 15px; }
      .hero-stats { grid-template-columns: 1fr 1fr; gap: 0 16px; margin-top: 37px; }
      .hero-stat { padding: 15px 0 0; }
      .section { padding: 54px 0; }
      .section-head { align-items: flex-start; flex-direction: column; gap: 12px; }
      h2 { font-size: 27px; }
      .intro-layout, .network-layout, .contact-layout { grid-template-columns: 1fr; gap: 25px; }
      .check-list { grid-template-columns: 1fr; }
      .service-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
      .service-item { padding: 14px; }
      .workflow { grid-template-columns: 1fr 1fr; gap: 24px 12px; }
      .workflow article { padding-right: 4px; }
      .workflow article::after { display: none; }
      .industry-grid { grid-template-columns: 1fr; }
      .industry-item { grid-template-columns: 100px 1fr; }
      .case-grid { grid-template-columns: 1fr 1fr; gap: 11px; }
      .case-content { padding: 13px; }
      .case-content h3 { font-size: 15px; }
      .score-panel { grid-template-columns: 1fr; gap: 12px; }
      .score-main { padding: 0 0 14px; border-right: 0; border-bottom: 1px solid var(--line); }
      .reviews { grid-template-columns: 1fr 1fr; gap: 10px; }
      .review { padding: 15px; }
      .article-layout { grid-template-columns: 1fr; gap: 18px; }
      .faq-list { grid-template-columns: 1fr; }
      .contact-form { padding: 16px; }
      .join-strip { align-items: flex-start; flex-direction: column; }
      .footer-inner { align-items: flex-start; flex-direction: column; gap: 6px; }
    }
    @media (max-width: 430px) {
      .nav-cta { min-height: 40px; padding: 0 12px; font-size: 13px; }
      .brand-name { font-size: 16px; }
      .ai-page-logo { width: 36px; }
      .nav-links a { padding: 8px; font-size: 12px; }
      .hero-actions .button { width: 100%; }
      .case-grid { grid-template-columns: 1fr; }
      .reviews { grid-template-columns: 1fr; }
      .contact-form { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
    }