:root {
      --green: #58b947;
      --green-dark: #217d3f;
      --lime: #b8df4c;
      --ink: #18352b;
      --muted: #60756b;
      --line: #dce9df;
      --paper: #f5faf4;
      --white: #ffffff;
      --orange: #f08a3c;
      --shadow: 0 18px 45px rgba(36, 100, 52, .1);
      --radius: 18px;
      --container: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      line-height: 1.7;
    }
    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; height: auto; display: block; }
    button, input, select, textarea { font: inherit; }
    .container {
      width: min(var(--container), calc(100% - 40px));
      margin: 0 auto;
    }
    .topbar {
      position: sticky;
      top: 0;
      z-index: 20;
      background: rgba(245,250,244,.94);
      border-bottom: 1px solid rgba(220,233,223,.9);
      backdrop-filter: blur(14px);
    }
    .nav {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 22px;
    }
    .brand {
      display: inline-flex;
      align-items: center;
      flex: 0 0 auto;
    }
    .ai-page-logo {
      width: 128px;
      max-height: 46px;
      object-fit: contain;
    }
    .nav-links {
      display: flex;
      align-items: center;
      justify-content: flex-end;
      gap: 0;
      flex-wrap: wrap;
    }
    .nav-links a {
      padding: 9px 11px;
      color: #36564a;
      font-size: 13px;
      border-radius: 8px;
      transition: .25s ease;
    }
    .nav-links a:hover { color: var(--green-dark); background: #e7f3df; }
    .nav-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      white-space: nowrap;
      padding: 11px 17px;
      border-radius: 8px;
      background: var(--green-dark);
      color: #fff;
      font-size: 14px;
      font-weight: 700;
      transition: transform .25s ease, background .25s ease;
    }
    .nav-cta:hover { transform: translateY(-2px); background: #175e31; }
    .menu-toggle { display: none; border: 0; background: transparent; color: var(--ink); font-size: 24px; }
    .hero {
      position: relative;
      overflow: hidden;
      padding: 96px 0 74px;
      background:
        linear-gradient(135deg, #eff9e9 0%, #f7fbf4 57%, #e7f4d8 100%);
      border-bottom: 1px solid #dcebd5;
    }
    .hero:before {
      content: "";
      position: absolute;
      width: 420px;
      height: 420px;
      right: -130px;
      top: -150px;
      border: 1px solid rgba(88,185,71,.25);
      border-radius: 50%;
      box-shadow: 0 0 0 30px rgba(88,185,71,.05), 0 0 0 62px rgba(88,185,71,.04);
    }
    .hero:after {
      content: "";
      position: absolute;
      left: 7%;
      bottom: 22px;
      width: 90px;
      height: 10px;
      background: var(--lime);
      transform: skewX(-28deg);
      opacity: .8;
    }
    .hero-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: minmax(0, 1.15fr) minmax(340px, .85fr);
      gap: 62px;
      align-items: center;
    }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--green-dark);
      font-size: 14px;
      font-weight: 800;
      letter-spacing: .08em;
    }
    .eyebrow:before {
      content: "";
      width: 30px;
      height: 3px;
      background: var(--green);
    }
    h1, h2, h3, p { margin-top: 0; }
    h1 {
      max-width: 720px;
      margin-bottom: 22px;
      font-size: clamp(38px, 6vw, 72px);
      line-height: 1.12;
      letter-spacing: 0;
    }
    .hero-copy {
      max-width: 650px;
      color: #4d665b;
      font-size: 18px;
    }
    .hero-actions { display: flex; gap: 13px; flex-wrap: wrap; margin: 30px 0 25px; }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 48px;
      padding: 0 22px;
      border: 1px solid transparent;
      border-radius: 9px;
      cursor: pointer;
      font-weight: 700;
      transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
    }
    .btn:hover { transform: translateY(-3px); box-shadow: 0 10px 22px rgba(33,125,63,.16); }
    .btn-primary { background: var(--green-dark); color: #fff; }
    .btn-secondary { background: #fff; border-color: #cfe2ce; color: var(--green-dark); }
    .hero-note { color: #688074; font-size: 13px; }
    .hero-panel {
      position: relative;
      padding: 25px;
      background: rgba(255,255,255,.72);
      border: 1px solid rgba(171,211,164,.72);
      border-radius: 22px;
      box-shadow: var(--shadow);
    }
    .hero-panel h3 { margin-bottom: 18px; font-size: 19px; }
    .signal {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
    }
    .signal-item {
      padding: 18px 15px;
      background: #f8fcf6;
      border: 1px solid #dcebd9;
      border-radius: 12px;
    }
    .signal-item strong { display: block; color: var(--green-dark); font-size: 25px; line-height: 1.2; }
    .signal-item span { color: var(--muted); font-size: 13px; }
    .ticker {
      margin-top: 15px;
      padding: 13px 15px;
      color: #4c665a;
      background: #edf7df;
      border-left: 4px solid var(--lime);
      font-size: 13px;
    }
    section { padding: 88px 0; }
    .section-head { max-width: 760px; margin-bottom: 35px; }
    .section-head h2 { margin-bottom: 10px; font-size: clamp(29px, 4vw, 46px); line-height: 1.2; }
    .section-head p { color: var(--muted); margin-bottom: 0; }
    .soft-band { background: #edf7e8; }
    .about-grid, .contact-grid {
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(300px, .75fr);
      gap: 45px;
      align-items: start;
    }
    .lead { color: #496358; font-size: 18px; }
    .check-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 13px; padding: 0; margin: 25px 0 0; list-style: none; }
    .check-list li { padding-left: 25px; position: relative; color: #3e5c50; }
    .check-list li:before { content: "✓"; position: absolute; left: 0; color: var(--green-dark); font-weight: 800; }
    .metric-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 13px; margin-top: 38px; }
    .metric { padding: 22px; border-top: 3px solid var(--green); background: #fff; box-shadow: 0 9px 28px rgba(43,100,51,.07); }
    .metric strong { display: block; color: var(--green-dark); font-size: 30px; }
    .metric span { color: var(--muted); font-size: 13px; }
    .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .feature-card, .review-card, .faq-item, .contact-panel, .network-card {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: var(--radius);
    }
    .feature-card {
      padding: 23px;
      transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
    }
    .feature-card:hover, .review-card:hover, .network-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: #a9d39f; }
    .feature-card .icon {
      display: inline-grid;
      place-items: center;
      width: 42px;
      height: 42px;
      margin-bottom: 17px;
      color: #fff;
      background: var(--green);
      border-radius: 10px;
      font-weight: 800;
    }
    .feature-card h3 { margin-bottom: 7px; font-size: 19px; }
    .feature-card p { margin-bottom: 0; color: var(--muted); font-size: 14px; }
    .workflow {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 0;
      counter-reset: step;
    }
    .step { position: relative; padding: 20px 18px 20px 0; }
    .step:not(:last-child):after {
      content: "";
      position: absolute;
      top: 38px;
      right: 16px;
      width: calc(100% - 72px);
      height: 1px;
      background: #b4d5ad;
      transform: translateX(50%);
    }
    .step-number {
      position: relative;
      z-index: 1;
      display: grid;
      place-items: center;
      width: 38px;
      height: 38px;
      margin-bottom: 18px;
      color: #fff;
      background: var(--green-dark);
      border-radius: 50%;
      font-weight: 800;
    }
    .step h3 { font-size: 17px; margin-bottom: 7px; }
    .step p { color: var(--muted); font-size: 13px; margin-bottom: 0; }
    .service-layout { display: grid; grid-template-columns: 1.25fr .75fr; gap: 20px; }
    .service-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .service-item { padding: 17px; background: #fff; border-left: 4px solid var(--green); border-radius: 0 12px 12px 0; box-shadow: 0 8px 22px rgba(40,98,47,.06); }
    .service-item strong { display: block; margin-bottom: 3px; }
    .service-item span { color: var(--muted); font-size: 13px; }
    .side-callout { padding: 27px; background: var(--ink); color: #eaf6e6; border-radius: var(--radius); }
    .side-callout h3 { color: #fff; font-size: 25px; }
    .side-callout p { color: #b8d0bb; }
    .side-callout .btn { background: var(--lime); color: #18352b; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; }
    .tag { padding: 8px 13px; color: #39624a; background: #e8f4df; border: 1px solid #cde4c7; border-radius: 6px; font-size: 13px; }
    .solution-grid, .network-grid, .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 17px; }
    .solution-card, .network-card { padding: 24px; border: 1px solid #d7e8d2; background: #fbfef9; border-radius: 14px; }
    .solution-card h3, .network-card h3 { margin-bottom: 9px; font-size: 20px; }
    .solution-card p, .network-card p { color: var(--muted); font-size: 14px; margin-bottom: 0; }
    .timeline { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
    .timeline-card { padding: 21px; background: #fff; border-bottom: 4px solid var(--lime); border-radius: 12px; }
    .timeline-card small { color: var(--green-dark); font-weight: 800; }
    .timeline-card h3 { margin: 7px 0; font-size: 18px; }
    .timeline-card p { margin: 0; color: var(--muted); font-size: 13px; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .case-card { overflow: hidden; background: #fff; border: 1px solid var(--line); border-radius: 15px; }
    .case-media { aspect-ratio: 16 / 9; overflow: hidden; background: #e5f0df; }
    .case-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .45s ease; }
    .case-card:hover img { transform: scale(1.04); }
    .case-body { padding: 18px; }
    .case-body h3 { margin-bottom: 5px; font-size: 18px; }
    .case-body p { color: var(--muted); font-size: 13px; margin-bottom: 0; }
    .compare-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 16px; background: #fff; }
    table { width: 100%; min-width: 720px; border-collapse: collapse; }
    th, td { padding: 17px 18px; text-align: left; border-bottom: 1px solid #e6eee6; }
    th { color: #fff; background: var(--green-dark); font-size: 14px; }
    td { color: #52685d; font-size: 14px; }
    td:first-child { color: var(--ink); font-weight: 700; }
    tr:last-child td { border-bottom: 0; }
    .rating-box { display: flex; align-items: center; gap: 24px; margin-top: 22px; padding: 23px; background: #eff8e8; border-radius: 13px; }
    .rating-score { color: var(--green-dark); font-size: 42px; font-weight: 800; line-height: 1; }
    .stars { color: #f2a52a; letter-spacing: 3px; }
    .price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .price-card { padding: 24px; background: #fff; border: 1px solid var(--line); border-radius: 15px; }
    .price-card.featured { border: 2px solid var(--green); transform: translateY(-8px); }
    .price-card h3 { margin-bottom: 7px; }
    .price-card strong { display: block; color: var(--green-dark); font-size: 28px; margin: 8px 0; }
    .price-card p { color: var(--muted); font-size: 13px; margin-bottom: 0; }
    .review-card { padding: 22px; transition: transform .25s ease, box-shadow .25s ease; }
    .review-card p { color: #4e655a; font-size: 14px; }
    .review-card footer { color: var(--green-dark); font-size: 13px; font-weight: 700; }
    .faq-list { display: grid; gap: 11px; }
    .faq-item { overflow: hidden; }
    .faq-question {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      padding: 19px 21px;
      border: 0;
      background: #fff;
      color: var(--ink);
      text-align: left;
      cursor: pointer;
      font-weight: 700;
    }
    .faq-question span:last-child { color: var(--green-dark); font-size: 21px; transition: transform .25s ease; }
    .faq-answer { display: none; padding: 0 21px 18px; color: var(--muted); font-size: 14px; }
    .faq-item.open .faq-answer { display: block; }
    .faq-item.open .faq-question span:last-child { transform: rotate(45deg); }
    .article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .article-card { padding: 22px; background: #fff; border: 1px solid var(--line); border-radius: 13px; }
    .article-card small { color: var(--green-dark); }
    .article-card h3 { margin: 8px 0; font-size: 18px; }
    .article-card p { margin: 0; color: var(--muted); font-size: 13px; }
    .contact-panel { padding: 28px; box-shadow: var(--shadow); }
    .contact-panel h3 { margin-bottom: 8px; font-size: 24px; }
    .contact-panel p { color: var(--muted); }
    .form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    label { color: #476155; font-size: 13px; font-weight: 700; }
    input, select, textarea { width: 100%; padding: 12px 13px; color: var(--ink); background: #fbfef9; border: 1px solid #cfe0d0; border-radius: 8px; outline: 0; }
    input:focus, select:focus, textarea:focus { border-color: var(--green); box-shadow: 0 0 0 3px rgba(88,185,71,.14); }
    textarea { min-height: 120px; resize: vertical; }
    .contact-info { display: grid; gap: 15px; }
    .info-row { padding: 18px; background: #eaf5e5; border-radius: 12px; }
    .info-row strong { display: block; margin-bottom: 3px; color: var(--green-dark); }
    .info-row span { color: #536b5d; font-size: 14px; }
    .qr { width: 125px; margin-top: 9px; border-radius: 8px; }
    .links-section { padding: 48px 0; background: #e5f2df; }
    .links-section h2 { font-size: 22px; margin-bottom: 17px; }
    .link-list { display: flex; flex-wrap: wrap; gap: 10px 22px; }
    .link-list a { color: #376c45; font-size: 13px; text-decoration: underline; text-underline-offset: 3px; }
    footer { background: #18352b; color: #d9ead9; padding: 32px 0; }
    .footer-grid { display: flex; align-items: center; justify-content: space-between; gap: 25px; }
    footer p { margin: 0; font-size: 13px; color: #b8cfba; }
    .footer-nav { display: flex; flex-wrap: wrap; gap: 15px; font-size: 13px; }
    .footer-nav a { color: #d9ead9; }
    .float-help, .to-top {
      position: fixed;
      right: 22px;
      z-index: 15;
      display: grid;
      place-items: center;
      border: 0;
      cursor: pointer;
      box-shadow: 0 8px 22px rgba(19,68,32,.2);
    }
    .float-help { bottom: 82px; width: 52px; height: 52px; border-radius: 50%; background: var(--green); color: #fff; font-size: 13px; font-weight: 800; }
    .to-top { bottom: 22px; width: 40px; height: 40px; border-radius: 8px; background: #fff; color: var(--green-dark); opacity: 0; pointer-events: none; transition: .25s; }
    .to-top.visible { opacity: 1; pointer-events: auto; }
    .reveal { opacity: 0; transform: translateY(18px); transition: opacity .65s ease, transform .65s ease; }
    .reveal.show { opacity: 1; transform: translateY(0); }
    @media (max-width: 1060px) {
      .nav-links a { padding-left: 7px; padding-right: 7px; }
      .hero-grid, .about-grid, .contact-grid, .service-layout { grid-template-columns: 1fr; }
      .hero { padding-top: 72px; }
      .workflow { grid-template-columns: repeat(3, 1fr); }
      .step:not(:last-child):after { display: none; }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 28px)); }
      section { padding: 62px 0; }
      .nav { min-height: 65px; }
      .menu-toggle { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 65px;
        left: 14px;
        right: 14px;
        padding: 10px;
        background: #fff;
        border: 1px solid var(--line);
        border-radius: 12px;
        box-shadow: var(--shadow);
      }
      .nav-links.open { display: grid; grid-template-columns: repeat(2, 1fr); }
      .nav-links a { padding: 10px; }
      .nav-cta { display: none; }
      .hero-grid { gap: 32px; }
      h1 { font-size: 42px; }
      .hero-copy { font-size: 16px; }
      .signal, .metric-strip, .feature-grid, .service-list, .solution-grid, .network-grid, .review-grid, .case-grid, .article-grid, .price-grid, .timeline { grid-template-columns: 1fr; }
      .check-list, .form-grid { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .price-card.featured { transform: none; }
      .footer-grid { align-items: flex-start; flex-direction: column; }
      .footer-nav { gap: 10px; }
      .rating-box { align-items: flex-start; flex-direction: column; gap: 12px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *:before, *:after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; }
    }