:root {
      color-scheme: light;
      --ink: #172c2d;
      --muted: #607575;
      --line: #dce9e6;
      --paper: #f6faf9;
      --white: #fff;
      --teal: #087c72;
      --teal-dark: #075c57;
      --mint: #d9f3eb;
      --lime: #c8e96b;
      --coral: #ef795f;
      --serif: Georgia, "Times New Roman", serif;
      font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
      scroll-behavior: smooth;
    }
    * { box-sizing: border-box; }
    body { margin: 0; color: var(--ink); background: var(--paper); line-height: 1.65; }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    button, a { -webkit-tap-highlight-color: transparent; }
    .container { width: min(1160px, calc(100% - 40px)); margin-inline: auto; }
    .site-header { position: sticky; top: 0; z-index: 20; background: rgba(246,250,249,.94); border-bottom: 1px solid rgba(220,233,230,.9); backdrop-filter: blur(14px); }
    .nav-row { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; min-width: 185px; font-size: 17px; font-weight: 800; letter-spacing: 0; }
    .ai-page-logo { display: block; width: 38px; max-width: 100%; height: auto; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 0; }
    .nav-links a { padding: 11px 12px; color: #45605e; font-size: 13px; transition: color .2s ease; }
    .nav-links a:hover { color: var(--teal); }
    .nav-cta, .button { display: inline-flex; align-items: center; justify-content: center; gap: 9px; border: 1px solid var(--teal); padding: 12px 18px; color: white; background: var(--teal); font-weight: 700; transition: transform .2s ease, background .2s ease, box-shadow .2s ease; }
    .nav-cta:hover, .button:hover { background: var(--teal-dark); box-shadow: 0 8px 22px rgba(8,124,114,.18); transform: translateY(-2px); }
    .button-light { color: var(--teal-dark); background: white; border-color: white; }
    .button-outline { color: var(--teal-dark); background: transparent; border-color: #9dc8bf; }
    .menu-toggle { display: none; width: 42px; height: 42px; align-items: center; justify-content: center; color: var(--ink); background: white; border: 1px solid var(--line); cursor: pointer; }
    .menu-toggle svg { width: 21px; height: 21px; }
    .hero { position: relative; overflow: hidden; color: var(--ink); background: #e5f5ef; border-bottom: 1px solid #d4e9e2; }
    .hero::before { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .46; background-image: linear-gradient(rgba(8,124,114,.07) 1px, transparent 1px), linear-gradient(90deg, rgba(8,124,114,.07) 1px, transparent 1px); background-size: 48px 48px; mask-image: linear-gradient(90deg, #000, transparent 88%); }
    .hero-inner { position: relative; display: grid; grid-template-columns: 1.15fr .85fr; align-items: center; gap: 56px; padding-top: 82px; padding-bottom: 80px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 20px; color: var(--teal-dark); font-size: 12px; font-weight: 800; letter-spacing: 1.2px; text-transform: uppercase; }
    .eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--coral); }
    h1, h2, h3, p { margin-top: 0; }
    h1 { max-width: 680px; margin-bottom: 18px; font-size: clamp(38px, 5.2vw, 66px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 600px; margin-bottom: 28px; color: #4d6663; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-note { margin: 18px 0 0; color: #57716c; font-size: 12px; }
    .hero-art { min-height: 330px; position: relative; display: grid; place-items: center; }
    .orbit { width: min(310px, 75vw); aspect-ratio: 1; position: relative; display: grid; place-items: center; border: 1px solid rgba(8,124,114,.25); border-radius: 50%; animation: turn 32s linear infinite; }
    .orbit::before, .orbit::after { content: ""; position: absolute; border: 1px solid rgba(8,124,114,.18); border-radius: 50%; }
    .orbit::before { inset: 27px; }
    .orbit::after { inset: 61px; }
    .core { z-index: 1; width: 128px; aspect-ratio: 1; display: grid; place-content: center; text-align: center; color: white; background: var(--teal); border-radius: 50%; box-shadow: 0 18px 45px rgba(8,124,114,.25); animation: breathe 4s ease-in-out infinite; }
    .core strong { font-family: var(--serif); font-size: 29px; line-height: 1; }
    .core span { margin-top: 7px; font-size: 10px; letter-spacing: 1px; }
    .orbit-label { position: absolute; display: flex; align-items: center; gap: 7px; padding: 8px 11px; color: var(--ink); background: rgba(255,255,255,.92); border: 1px solid #d2e5df; box-shadow: 0 7px 20px rgba(34,76,68,.07); font-size: 11px; font-weight: 700; animation: float 5s ease-in-out infinite; }
    .orbit-label::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--coral); }
    .label-one { top: 35px; left: 4px; }
    .label-two { top: 70px; right: -4px; animation-delay: -1s; }
    .label-three { bottom: 42px; right: 4px; animation-delay: -2s; }
    .label-four { bottom: 32px; left: -2px; animation-delay: -3s; }
    .hero-index { position: absolute; right: 2px; bottom: 0; color: #6a8b84; font-family: var(--serif); font-size: 12px; }
    .strip { background: var(--teal-dark); color: white; }
    .strip-inner { display: grid; grid-template-columns: repeat(4, 1fr); }
    .metric { padding: 21px 18px; border-right: 1px solid rgba(255,255,255,.2); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; font-family: var(--serif); font-size: 25px; line-height: 1.2; }
    .metric span { color: #c5e4dc; font-size: 11px; }
    main { overflow: clip; }
    .section { padding: 82px 0; }
    .section-tint { background: #eaf5f1; border-block: 1px solid #dcebe5; }
    .section-head { max-width: 720px; margin-bottom: 34px; }
    .section-kicker { margin-bottom: 10px; color: var(--teal); font-size: 11px; font-weight: 800; letter-spacing: 1.4px; text-transform: uppercase; }
    h2 { margin-bottom: 12px; font-size: clamp(29px, 3.5vw, 42px); line-height: 1.2; letter-spacing: 0; }
    .section-head p { margin-bottom: 0; color: var(--muted); }
    .intro-grid { display: grid; grid-template-columns: .82fr 1.18fr; gap: 56px; align-items: start; }
    .intro-lead { font-size: 20px; line-height: 1.55; font-weight: 650; }
    .intro-copy { color: var(--muted); }
    .intro-points { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 25px; margin: 24px 0 0; padding: 0; list-style: none; }
    .intro-points li { padding: 13px 0; border-top: 1px solid var(--line); color: #314b49; font-size: 14px; }
    .intro-points li::before { content: "↗"; margin-right: 10px; color: var(--teal); font-weight: 800; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: #cfe2dc; border: 1px solid #cfe2dc; }
    .service-item { min-height: 192px; padding: 24px; background: var(--paper); transition: background .2s ease; }
    .service-item:hover { background: white; }
    .service-item .index { color: #8aa7a1; font-family: var(--serif); font-size: 13px; }
    .service-item h3 { margin: 20px 0 8px; font-size: 18px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-more { display: flex; justify-content: space-between; gap: 20px; align-items: center; margin-top: 22px; padding-top: 18px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
    .text-link { color: var(--teal-dark); font-weight: 750; white-space: nowrap; }
    .text-link:hover { text-decoration: underline; text-underline-offset: 4px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 25px; counter-reset: step; }
    .step { position: relative; padding-top: 22px; border-top: 2px solid #9fc9be; counter-increment: step; }
    .step::before { content: "0" counter(step); position: absolute; top: -15px; right: 0; padding-left: 8px; color: var(--teal); background: var(--paper); font-family: var(--serif); font-size: 13px; }
    .step h3 { margin-bottom: 7px; font-size: 17px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }
    .solution-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 52px; }
    .solution { display: grid; grid-template-columns: 42px 1fr; gap: 16px; padding: 20px 0; border-bottom: 1px solid var(--line); }
    .solution-mark { width: 38px; height: 38px; display: grid; place-items: center; color: var(--teal-dark); background: var(--mint); font-size: 12px; font-weight: 800; }
    .solution h3 { margin: 0 0 5px; font-size: 16px; }
    .solution p { margin: 0; color: var(--muted); font-size: 13px; }
    .network { display: grid; grid-template-columns: .78fr 1.22fr; gap: 48px; align-items: start; }
    .network-copy p { color: var(--muted); }
    .tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
    .tag { padding: 7px 11px; color: #305a54; background: white; border: 1px solid #d3e5df; font-size: 12px; }
    .network-note { margin-top: 17px; font-size: 12px; }
    .compare-wrap { overflow-x: auto; border: 1px solid var(--line); background: white; }
    .compare { width: 100%; min-width: 720px; border-collapse: collapse; }
    .compare th, .compare td { padding: 15px 17px; border-bottom: 1px solid #e8efed; text-align: left; font-size: 13px; }
    .compare th { color: #48615e; background: #eef6f3; font-size: 12px; }
    .compare td:first-child { width: 24%; color: var(--ink); font-weight: 700; }
    .compare td:nth-child(2) { color: var(--teal-dark); font-weight: 700; }
    .compare tr:last-child td { border-bottom: 0; }
    .rating { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 18px; margin-bottom: 23px; padding: 20px 23px; color: white; background: var(--teal-dark); }
    .rating-score { font-family: var(--serif); font-size: 45px; line-height: 1; }
    .rating-stars { color: var(--lime); letter-spacing: 2px; font-size: 18px; }
    .rating small { display: block; margin-top: 4px; color: #d0e9e1; font-size: 11px; }
    .rating p { margin: 0; font-size: 14px; }
    .showcase { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
    .showcase figure { margin: 0; }
    .media-frame { overflow: hidden; background: #e8f2ee; border: 1px solid var(--line); }
    .media-frame img { display: block; width: 100%; height: auto; }
    .showcase figcaption { padding-top: 11px; color: var(--muted); font-size: 13px; }
    .square-feature { display: grid; grid-template-columns: 180px 1fr; gap: 24px; align-items: center; margin-top: 28px; padding-top: 25px; border-top: 1px solid var(--line); }
    .square-feature .media-frame { max-width: 180px; }
    .square-feature h3 { margin-bottom: 7px; font-size: 17px; }
    .square-feature p { margin: 0; color: var(--muted); font-size: 13px; }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 28px; border-top: 1px solid var(--line); }
    .review { padding: 24px 0; border-bottom: 1px solid var(--line); }
    .review blockquote { margin: 0 0 15px; color: #314b49; font-size: 14px; }
    .review cite { color: var(--teal-dark); font-size: 12px; font-style: normal; font-weight: 750; }
    .review cite span { display: block; color: #82938f; font-weight: 400; }
    .article-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
    .article-card { min-height: 152px; display: flex; flex-direction: column; justify-content: space-between; padding: 17px; background: white; transition: background .2s ease; }
    .article-card:hover { background: #f3fbf7; }
    .article-card span { color: #839994; font-size: 11px; }
    .article-card strong { font-size: 14px; line-height: 1.5; }
    .article-card b { color: var(--teal); font-size: 12px; }
    .faq-list { border-top: 1px solid #cbded8; }
    .faq-item { border-bottom: 1px solid #cbded8; }
    .faq-item summary { position: relative; padding: 19px 42px 19px 0; cursor: pointer; list-style: none; font-size: 15px; font-weight: 700; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; top: 15px; right: 4px; color: var(--teal); font-family: var(--serif); font-size: 22px; transition: transform .2s ease; }
    .faq-item[open] summary::after { transform: rotate(45deg); }
    .faq-item p { max-width: 800px; margin: 0; padding: 0 42px 19px 0; color: var(--muted); font-size: 14px; }
    .contact-band { color: white; background: var(--teal-dark); }
    .contact-grid { display: grid; grid-template-columns: .82fr 1.18fr; gap: 60px; align-items: start; }
    .contact-band .section-kicker { color: var(--lime); }
    .contact-band h2 { max-width: 440px; }
    .contact-band .contact-copy { color: #c8e0d9; }
    .contact-details { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; margin-top: 27px; }
    .contact-detail { padding-top: 12px; border-top: 1px solid rgba(255,255,255,.25); }
    .contact-detail span { display: block; color: #b6d7cf; font-size: 11px; }
    .contact-detail strong { font-size: 14px; }
    .contact-detail a { text-decoration: underline; text-underline-offset: 3px; }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 24px; color: var(--ink); background: white; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { color: #536966; font-size: 12px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-width: 0; padding: 11px 12px; color: var(--ink); background: #f8fbfa; border: 1px solid #d4e2de; border-radius: 0; outline: none; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(8,124,114,.1); }
    .field textarea { min-height: 104px; resize: vertical; }
    .form-submit { grid-column: 1 / -1; justify-self: start; cursor: pointer; }
    .site-footer { padding: 28px 0; color: #38514e; background: #eaf3ef; border-top: 1px solid #d2e3dd; }
    .footer-main { display: flex; justify-content: space-between; align-items: flex-start; gap: 28px; }
    .footer-brand { font-weight: 800; }
    .footer-note { margin: 5px 0 0; color: #69807b; font-size: 12px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 17px; justify-content: flex-end; font-size: 12px; }
    .footer-links a { color: #42615b; }
    .footer-bottom { display: flex; justify-content: space-between; gap: 20px; margin-top: 20px; padding-top: 14px; border-top: 1px solid #d2e3dd; color: #708580; font-size: 11px; }
    .float-tools { position: fixed; z-index: 15; right: 18px; bottom: 20px; display: grid; gap: 8px; }
    .float-tools a { width: 46px; height: 46px; display: grid; place-items: center; color: white; background: var(--teal); border: 1px solid rgba(255,255,255,.4); box-shadow: 0 6px 18px rgba(12,71,63,.2); font-size: 12px; font-weight: 800; transition: transform .2s ease; }
    .float-tools a:hover { transform: translateY(-3px); }
    .reveal { opacity: 0; transform: translateY(16px); transition: opacity .6s ease, transform .6s ease; }
    .reveal.is-visible { opacity: 1; transform: none; }
    @keyframes turn { to { transform: rotate(360deg); } }
    @keyframes breathe { 50% { box-shadow: 0 22px 55px rgba(8,124,114,.34); transform: scale(1.03); } }
    @keyframes float { 50% { translate: 0 -7px; } }
    @media (max-width: 960px) {
      .nav-row { gap: 14px; }
      .brand { min-width: auto; }
      .nav-links a { padding-inline: 8px; font-size: 12px; }
      .nav-cta { padding: 10px 12px; font-size: 12px; }
      .hero-inner { gap: 22px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .article-list { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 720px) {
      .container { width: min(100% - 32px, 560px); }
      .nav-row { min-height: 66px; }
      .menu-toggle { display: inline-flex; margin-left: auto; }
      .nav-cta { display: none; }
      .nav-links { display: none; position: absolute; top: 65px; left: 0; right: 0; padding: 8px 16px 14px; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 12px 20px rgba(21,61,53,.08); }
      .nav-links.is-open { display: grid; grid-template-columns: repeat(2, 1fr); }
      .nav-links a { padding: 11px 8px; border-bottom: 1px solid #e6efec; font-size: 13px; }
      .hero-inner { grid-template-columns: 1fr; padding-top: 57px; padding-bottom: 42px; gap: 22px; }
      h1 { font-size: 43px; }
      .hero-copy { font-size: 15px; }
      .hero-art { min-height: 265px; }
      .orbit { width: 245px; }
      .core { width: 105px; }
      .label-one { left: -8px; }
      .label-two { right: -8px; }
      .strip-inner { grid-template-columns: repeat(2, 1fr); }
      .metric { padding: 16px; border-bottom: 1px solid rgba(255,255,255,.2); }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(3), .metric:nth-child(4) { border-bottom: 0; }
      .section { padding: 60px 0; }
      .intro-grid, .network, .contact-grid { grid-template-columns: 1fr; gap: 25px; }
      .intro-points { gap: 0 14px; }
      .workflow { grid-template-columns: repeat(2, 1fr); gap: 28px 18px; }
      .solution-grid { grid-template-columns: 1fr; }
      .review-grid { grid-template-columns: repeat(2, 1fr); gap: 0 18px; }
      .article-list { grid-template-columns: repeat(2, 1fr); }
      .contact-grid { gap: 25px; }
      .footer-main, .footer-bottom { flex-direction: column; }
      .footer-links { justify-content: flex-start; }
    }
    @media (max-width: 430px) {
      .container { width: calc(100% - 28px); }
      .brand { font-size: 15px; }
      .ai-page-logo { width: 32px; }
      h1 { font-size: 37px; }
      .hero-actions .button { width: 100%; }
      .service-grid { grid-template-columns: 1fr; }
      .service-item { min-height: 0; }
      .showcase { grid-template-columns: 1fr; gap: 18px; }
      .square-feature { grid-template-columns: 110px 1fr; gap: 15px; }
      .square-feature .media-frame { max-width: 110px; }
      .review-grid { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .contact-form { grid-template-columns: 1fr; padding: 18px; }
      .field.full, .form-submit { grid-column: 1; }
      .contact-details { gap: 12px; }
      .float-tools { right: 9px; bottom: 12px; }
      .float-tools a { width: 42px; height: 42px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }