:root {
      color-scheme: light;
      --ink: #17302f;
      --muted: #5e7472;
      --teal: #087f78;
      --teal-dark: #075f5b;
      --mint: #d9f2ec;
      --line: #dce9e5;
      --paper: #f6fbfa;
      --white: #fff;
      --coral: #e9795c;
      --max: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: linear-gradient(180deg, #f4faf8 0%, #fbfdfc 42%, #f3f9f7 100%);
      font-family: Inter, "Noto Sans SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    img { display: block; 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(246,251,250,.94); border-bottom: 1px solid rgba(220,233,229,.9); backdrop-filter: blur(12px); }
    .nav { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; font-weight: 800; }
    .brand img { width: 42px; height: 42px; object-fit: contain; }
    .brand span { font-size: 17px; letter-spacing: 0; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 10px 11px; color: #405b58; font-size: 13px; transition: color .2s ease; }
    .nav-links a:hover { color: var(--teal); }
    .nav-action, .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; border-radius: 5px; padding: 12px 18px; background: var(--teal); color: #fff; font-weight: 700; cursor: pointer; transition: background .2s ease, transform .2s ease, box-shadow .2s ease; }
    .nav-action:hover, .button:hover { background: var(--teal-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(8,127,120,.2); }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 5px; font-size: 21px; cursor: pointer; }
    .hero { position: relative; overflow: hidden; padding: 78px 0 48px; border-bottom: 1px solid var(--line); }
    .hero::before { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .44; background-image: linear-gradient(rgba(8,127,120,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(8,127,120,.06) 1px, transparent 1px); background-size: 44px 44px; mask-image: linear-gradient(to bottom, black, transparent 88%); }
    .hero-inner { position: relative; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(280px, .75fr); align-items: center; gap: 56px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--teal-dark); font-size: 13px; font-weight: 800; letter-spacing: 0; }
    .eyebrow::before { content: ""; width: 24px; height: 2px; background: var(--coral); }
    h1 { max-width: 660px; margin: 18px 0 18px; font-size: clamp(38px, 5vw, 64px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 640px; color: var(--muted); font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
    .button.secondary { color: var(--teal-dark); background: #fff; border: 1px solid #a8d2c9; }
    .button.secondary:hover { background: #eaf7f3; }
    .hero-note { margin-top: 17px; color: #647b78; font-size: 13px; }
    .hero-visual { position: relative; padding: 20px 0 20px 22px; border-left: 1px solid #a9d9d0; }
    .hero-visual::before { content: ""; position: absolute; left: -4px; top: 22px; width: 7px; height: 7px; background: var(--coral); border-radius: 50%; box-shadow: 0 0 0 6px #f4d8ce; }
    .visual-title { margin: 0 0 17px; font-size: 13px; color: var(--muted); }
    .model-cloud { display: flex; gap: 8px; flex-wrap: wrap; }
    .model-cloud span { border: 1px solid #cce4de; border-radius: 3px; padding: 7px 10px; background: rgba(255,255,255,.82); font-size: 12px; font-weight: 700; }
    .hero-stat { margin-top: 25px; padding-top: 18px; border-top: 1px solid var(--line); display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
    .hero-stat strong { display: block; font-size: 20px; color: var(--teal-dark); }
    .hero-stat span { color: var(--muted); font-size: 12px; }
    .metrics { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid var(--line); }
    .metric { padding: 22px 18px; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; font-size: 18px; }
    .metric span { color: var(--muted); font-size: 12px; }
    main section { padding: 76px 0; border-bottom: 1px solid rgba(220,233,229,.8); }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 30px; }
    .section-head h2 { margin: 6px 0 0; font-size: 32px; line-height: 1.2; letter-spacing: 0; }
    .section-head p { max-width: 540px; margin: 0; color: var(--muted); }
    .kicker { color: var(--teal); font-weight: 800; font-size: 12px; }
    .intro-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 44px; align-items: start; }
    .intro-copy { max-width: 630px; color: var(--muted); }
    .intro-copy p:first-child { margin-top: 0; color: var(--ink); font-size: 18px; }
    .capability-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 22px; border-top: 1px solid var(--line); }
    .capability { padding: 15px 0; border-bottom: 1px solid var(--line); }
    .capability strong { display: block; font-size: 14px; }
    .capability span { color: var(--muted); font-size: 12px; }
    .service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
    .service { padding: 21px 19px; border: 1px solid var(--line); border-top: 3px solid #54b6a6; background: rgba(255,255,255,.72); transition: transform .22s ease, box-shadow .22s ease; }
    .service:hover { transform: translateY(-4px); box-shadow: 0 12px 28px rgba(29,88,79,.09); }
    .service h3 { margin: 0 0 8px; font-size: 16px; }
    .service p { margin: 0; color: var(--muted); font-size: 13px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid #a8d2c9; }
    .step { position: relative; padding: 22px 20px 0 0; }
    .step::before { content: ""; position: absolute; top: -5px; left: 0; width: 9px; height: 9px; border: 2px solid var(--teal); background: var(--paper); border-radius: 50%; }
    .step small { color: var(--coral); font-weight: 800; }
    .step h3 { margin: 6px 0; font-size: 16px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }
    .solution-strip { display: grid; grid-template-columns: 1fr 1fr; gap: 35px; align-items: center; padding: 29px; border-left: 4px solid var(--coral); background: #eaf6f2; }
    .solution-strip h3 { margin: 0 0 8px; font-size: 21px; }
    .solution-strip p { margin: 0; color: var(--muted); font-size: 14px; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .tag-cloud span { padding: 7px 10px; background: white; border: 1px solid #d0e5df; color: #355d58; font-size: 12px; }
    .network { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; }
    .network-copy { color: var(--muted); }
    .network-list { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
    .network-list div { padding: 13px 15px; border-bottom: 1px solid var(--line); background: rgba(255,255,255,.55); font-size: 14px; }
    .case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .case { display: grid; grid-template-columns: 38% 1fr; border: 1px solid var(--line); background: #fff; }
    .case-media { aspect-ratio: 4 / 3; overflow: hidden; background: #e8f2ef; }
    .case-media img { width: 100%; height: 100%; object-fit: cover; }
    .case-text { padding: 18px; align-self: center; }
    .case-text h3 { margin: 0 0 7px; font-size: 16px; }
    .case-text p { margin: 0; color: var(--muted); font-size: 13px; }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { padding: 19px; border-top: 2px solid #7ac8b9; background: rgba(255,255,255,.68); }
    .review p { margin: 0 0 14px; font-size: 14px; color: #405653; }
    .review strong { font-size: 12px; color: var(--teal-dark); }
    .comparison-wrap { overflow-x: auto; border: 1px solid var(--line); background: white; }
    table { width: 100%; min-width: 700px; border-collapse: collapse; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid #e7efec; vertical-align: top; font-size: 13px; }
    th { background: #e9f5f1; color: #234a45; font-weight: 800; }
    td:first-child { font-weight: 700; }
    .rating { display: flex; align-items: center; gap: 16px; margin-bottom: 20px; }
    .rating strong { font-size: 34px; color: var(--teal-dark); line-height: 1; }
    .stars { color: #da8b3b; letter-spacing: 0; }
    .rating span { color: var(--muted); font-size: 13px; }
    .price-note { margin: 14px 0 0; color: var(--muted); font-size: 12px; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { padding: 17px 34px 17px 0; cursor: pointer; font-weight: 700; list-style: none; position: relative; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; right: 4px; top: 14px; color: var(--teal); font-size: 21px; font-weight: 400; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { margin: -3px 0 17px; max-width: 850px; color: var(--muted); font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .article-list a { display: flex; min-height: 100px; align-items: end; padding: 15px; border: 1px solid var(--line); background: #fff; color: var(--teal-dark); font-size: 13px; font-weight: 700; transition: border-color .2s ease, transform .2s ease; }
    .article-list a:hover { transform: translateY(-3px); border-color: #65b5a7; }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 42px; align-items: start; }
    .contact-info p { color: var(--muted); }
    .contact-info a { color: var(--teal-dark); font-weight: 700; }
    .contact-info .qr { width: 150px; padding: 8px; border: 1px solid var(--line); background: white; }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; padding: 11px 12px; border: 1px solid #cbded8; border-radius: 3px; outline: none; background: #fff; color: var(--ink); }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(8,127,120,.1); }
    .field textarea { min-height: 110px; resize: vertical; }
    .form-foot { display: flex; align-items: center; gap: 13px; margin-top: 16px; }
    .form-foot small { color: var(--muted); }
    .join-band { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 24px 0 0; }
    .join-band p { margin: 0; color: var(--muted); }
    .site-footer { padding: 28px 0; background: #eaf4f1; color: #294441; }
    .footer-top { display: flex; align-items: center; justify-content: space-between; gap: 22px; padding-bottom: 18px; border-bottom: 1px solid #cdded8; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: 12px; }
    .footer-links a:hover { color: var(--teal); }
    .footer-bottom { display: flex; justify-content: space-between; gap: 14px; padding-top: 14px; color: #59716d; font-size: 12px; }
    .float-tools { position: fixed; right: 18px; bottom: 20px; z-index: 15; display: grid; gap: 8px; }
    .float-tools a, .float-tools button { display: grid; place-items: center; width: 46px; height: 46px; border: 1px solid #c9dfd9; border-radius: 50%; background: #fff; color: var(--teal-dark); font-size: 12px; font-weight: 800; box-shadow: 0 5px 18px rgba(33,77,69,.12); cursor: pointer; }
    .reveal { opacity: 0; transform: translateY(12px); transition: opacity .6s ease, transform .6s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @media (prefers-reduced-motion: reduce) { *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; } .reveal { opacity: 1; transform: none; } }
    @media (max-width: 920px) {
      .nav { flex-wrap: wrap; min-height: 68px; }
      .menu-toggle { display: block; margin-left: auto; }
      .nav-action { order: 2; padding: 10px 13px; font-size: 13px; }
      .nav-links { display: none; order: 3; width: 100%; justify-content: flex-start; padding: 0 0 12px; }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 8px 10px; }
      .hero-inner { gap: 30px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .article-list { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 640px) {
      .container { width: min(var(--max), calc(100% - 30px)); }
      .hero { padding: 52px 0 28px; }
      .hero-inner, .intro-grid, .network, .contact-grid { grid-template-columns: 1fr; gap: 28px; }
      h1 { font-size: 40px; }
      .hero-copy { font-size: 15px; }
      .hero-visual { padding-left: 17px; }
      .metrics { grid-template-columns: 1fr 1fr; }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      main section { padding: 54px 0; }
      .section-head { display: block; }
      .section-head h2 { font-size: 27px; margin-bottom: 12px; }
      .service-grid, .workflow, .review-grid { grid-template-columns: 1fr 1fr; }
      .solution-strip { grid-template-columns: 1fr; gap: 20px; padding: 22px; }
      .case-grid { grid-template-columns: 1fr; }
      .case { grid-template-columns: 34% 1fr; }
      .network-list { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .join-band, .footer-top, .footer-bottom { align-items: flex-start; flex-direction: column; }
      .float-tools { right: 10px; bottom: 12px; }
      .float-tools a, .float-tools button { width: 42px; height: 42px; }
    }
    @media (max-width: 400px) {
      .service-grid, .workflow, .review-grid { grid-template-columns: 1fr; }
      .nav-action { display: none; }
      .case { grid-template-columns: 1fr; }
      .case-media { aspect-ratio: 16 / 9; }
      .article-list { grid-template-columns: 1fr; }
    }