:root {
      color-scheme: light;
      --ink: #18302e;
      --muted: #5c706b;
      --paper: #f8faf7;
      --white: #fff;
      --line: #dce7df;
      --green: #187b61;
      --green-dark: #105744;
      --lime: #d9ef83;
      --coral: #ee765d;
      --blue: #d9e9f4;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    button, a { -webkit-tap-highlight-color: transparent; }
    img { 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(248,250,247,.96);
      border-bottom: 1px solid rgba(24,48,46,.1);
      backdrop-filter: blur(12px);
    }
    .nav-row { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; flex-shrink: 0; font-weight: 800; }
    .brand img { width: 42px; max-height: 42px; object-fit: contain; }
    .brand span { line-height: 1.15; }
    .brand small { display: block; margin-top: 4px; color: var(--muted); font-size: 10px; font-weight: 600; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 9px 10px; color: #405653; font-size: 13px; font-weight: 650; }
    .nav-links a:hover { color: var(--green); }
    .nav-cta, .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 46px; padding: 0 19px; border: 0; border-radius: 5px;
      background: var(--green); color: #fff; font-weight: 750; cursor: pointer;
      transition: transform .18s ease, background .18s ease, box-shadow .18s ease;
    }
    .nav-cta { min-height: 40px; padding-inline: 15px; font-size: 13px; white-space: nowrap; }
    .button:hover, .nav-cta:hover { transform: translateY(-2px); background: var(--green-dark); box-shadow: 0 8px 18px rgba(16,87,68,.18); }
    .button.secondary { background: var(--white); color: var(--ink); border: 1px solid var(--line); }
    .button.secondary:hover { background: #eff6ef; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 4px; background: #fff; color: var(--ink); cursor: pointer; }
    .hero { overflow: hidden; background: #e9f4e7; border-bottom: 1px solid #dce9dc; }
    .hero-inner { padding: 74px 0 52px; }
    .hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 54px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--green-dark); font-size: 12px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
    .eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--coral); }
    h1 { max-width: 660px; margin: 17px 0 18px; font-size: clamp(38px, 5vw, 64px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 610px; margin: 0; color: #405b55; font-size: 17px; }
    .hero-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 27px; }
    .hero-note { margin-top: 17px; color: #58716a; font-size: 13px; }
    .hero-art { position: relative; min-height: 316px; display: grid; place-items: center; }
    .orbit { position: absolute; width: min(100%, 390px); aspect-ratio: 1; border: 1px solid rgba(24,123,97,.23); border-radius: 50%; animation: slowturn 28s linear infinite; }
    .orbit::before, .orbit::after { content: ""; position: absolute; border-radius: 50%; }
    .orbit::before { inset: 12%; border: 1px dashed rgba(24,123,97,.3); }
    .orbit::after { width: 15px; height: 15px; top: 12%; left: 18%; background: var(--coral); box-shadow: 220px 160px 0 var(--lime); }
    .core-panel { position: relative; z-index: 1; width: min(88%, 330px); padding: 26px; background: rgba(255,255,255,.88); border: 1px solid #d7e5d8; box-shadow: 15px 18px 0 rgba(24,123,97,.1); }
    .core-panel strong { display: block; font-size: 22px; }
    .core-panel p { margin: 7px 0 20px; color: var(--muted); font-size: 14px; }
    .mini-flow { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
    .mini-flow span { padding: 10px 6px; background: #eef5e9; color: #34544a; text-align: center; font-size: 11px; font-weight: 750; }
    .mini-flow span:nth-child(2) { background: #fce9e2; }
    .mini-flow span:nth-child(3) { background: #e6edf7; }
    .hero-ribbon { border-top: 1px solid rgba(24,48,46,.1); background: rgba(255,255,255,.42); }
    .ribbon-inner { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 17px 0; }
    .ribbon-label { color: var(--muted); font-size: 12px; font-weight: 700; white-space: nowrap; }
    .model-list { display: flex; justify-content: flex-end; gap: 8px; flex-wrap: wrap; }
    .model-list span { padding: 4px 9px; border: 1px solid #ccded0; color: #35574e; font-size: 11px; }
    section.content-section { padding: 76px 0; }
    .section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .section-heading h2 { margin: 8px 0 0; font-size: clamp(27px, 3vw, 39px); line-height: 1.2; }
    .section-heading p { max-width: 510px; margin: 0; color: var(--muted); font-size: 14px; }
    .intro-band { display: grid; grid-template-columns: .9fr 1.1fr; gap: 42px; align-items: start; padding: 34px 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .intro-band h3 { margin: 0; font-size: 25px; line-height: 1.35; }
    .intro-band p { margin: 0; color: var(--muted); }
    .feature-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 30px; border: 1px solid var(--line); background: #fff; }
    .metric { padding: 22px; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; color: var(--green); font-size: 23px; }
    .metric span { color: var(--muted); font-size: 12px; }
    .services-section { background: #eff5ef; border-block: 1px solid #e0e9df; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: #d7e3d8; border: 1px solid #d7e3d8; }
    .service-item { min-height: 182px; padding: 22px; background: #f8faf7; transition: background .2s, transform .2s; }
    .service-item:hover { position: relative; z-index: 1; background: #fff; transform: translateY(-3px); }
    .service-index { display: inline-block; margin-bottom: 12px; color: var(--coral); font-size: 11px; font-weight: 800; }
    .service-item h3 { margin: 0 0 8px; font-size: 18px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 24px; }
    .service-tags span { padding: 6px 10px; background: #e6efe5; color: #34584c; font-size: 12px; }
    .workshop-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: start; }
    .workshop-copy { padding: 24px 0; }
    .workshop-copy h3 { margin: 0 0 12px; font-size: 24px; }
    .workshop-copy p { margin: 0; color: var(--muted); }
    .workshop-list { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); }
    .workshop-list div { padding: 16px 12px 16px 0; border-bottom: 1px solid var(--line); }
    .workshop-list strong { display: block; margin-bottom: 3px; font-size: 14px; }
    .workshop-list span { color: var(--muted); font-size: 12px; }
    .industry-section { background: #f4ece3; border-block: 1px solid #eadfd2; }
    .industry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
    .industry { min-height: 118px; padding: 18px; border-left: 3px solid var(--coral); background: rgba(255,255,255,.72); }
    .industry strong { display: block; margin-bottom: 5px; }
    .industry span { color: var(--muted); font-size: 12px; }
    .network-band { display: grid; grid-template-columns: .8fr 1.2fr; gap: 35px; align-items: center; padding: 30px; background: #e7f0f4; }
    .network-band h3 { margin: 0 0 8px; font-size: 23px; }
    .network-band p { margin: 0; color: var(--muted); font-size: 14px; }
    .network-models { display: flex; gap: 8px; flex-wrap: wrap; }
    .network-models span { padding: 8px 11px; border: 1px solid #c5d7df; background: rgba(255,255,255,.6); font-size: 12px; }
    .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; }
    .step { position: relative; padding: 20px 20px 20px 0; border-top: 2px solid var(--green); counter-increment: step; }
    .step::before { content: "0" counter(step); display: block; margin-bottom: 15px; color: var(--coral); font-size: 12px; font-weight: 800; }
    .step h3 { margin: 0 0 7px; font-size: 17px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }
    .case-grid { display: grid; grid-template-columns: 1.2fr .8fr; gap: 18px; align-items: stretch; }
    .case-feature { padding: 28px; background: #eaf1e5; }
    .case-feature img, .case-side img { display: block; width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; }
    .case-feature h3, .case-side h3 { margin: 18px 0 7px; font-size: 20px; }
    .case-feature p, .case-side p { margin: 0; color: var(--muted); font-size: 13px; }
    .case-side { display: grid; align-content: start; padding: 20px; border: 1px solid var(--line); background: #fff; }
    .case-side img { aspect-ratio: 4 / 3; }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
    .review { padding: 21px; background: #fff; border-top: 2px solid var(--lime); }
    .review p { margin: 0 0 18px; color: #415a54; font-size: 14px; }
    .review strong { display: block; font-size: 13px; }
    .review span { color: var(--muted); font-size: 11px; }
    .rating-section { background: #183b36; color: #fff; }
    .rating-section .section-heading p, .rating-section .eyebrow { color: #d6e7d8; }
    .rating-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 30px; align-items: start; }
    .rating-score { padding: 26px; background: #235248; }
    .rating-score strong { display: block; color: var(--lime); font-size: 54px; line-height: 1.1; }
    .stars { margin: 8px 0; color: #f6c86a; font-size: 22px; letter-spacing: 0; }
    .rating-score p { margin: 0; color: #deebe4; font-size: 13px; }
    .table-wrap { overflow-x: auto; border: 1px solid rgba(255,255,255,.22); }
    table { width: 100%; border-collapse: collapse; min-width: 560px; background: rgba(255,255,255,.04); }
    th, td { padding: 12px 14px; text-align: left; border-bottom: 1px solid rgba(255,255,255,.15); font-size: 13px; }
    th { color: #d6e7d8; font-size: 12px; }
    td:last-child { color: #e1ef9e; }
    .match-section { background: #f1f5e9; }
    .match-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 40px; align-items: start; }
    .match-layout h3 { margin: 0 0 12px; font-size: 24px; }
    .match-layout p { color: var(--muted); }
    form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    label { font-size: 12px; font-weight: 750; }
    input, select, textarea { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid #cfdbce; border-radius: 3px; background: #fff; color: var(--ink); }
    textarea { min-height: 104px; resize: vertical; }
    input:focus, select:focus, textarea:focus { outline: 2px solid rgba(24,123,97,.2); border-color: var(--green); }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 17px 32px 17px 0; font-weight: 750; cursor: pointer; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 2px; top: 12px; color: var(--green); font-size: 22px; }
    details[open] summary::after { content: "−"; }
    details p { max-width: 850px; margin: 0 0 18px; color: var(--muted); font-size: 14px; }
    .article-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
    .article-link { display: flex; min-height: 104px; flex-direction: column; justify-content: space-between; padding: 15px; border: 1px solid var(--line); background: #fff; }
    .article-link strong { font-size: 14px; }
    .article-link span { color: var(--green); font-size: 12px; }
    .contact-band { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 24px; padding: 28px 0; border-top: 1px solid var(--line); }
    .contact-band h3 { margin: 0 0 6px; font-size: 22px; }
    .contact-band p { margin: 0; color: var(--muted); font-size: 14px; }
    .contact-links { display: flex; gap: 12px; flex-wrap: wrap; }
    .contact-links a { color: var(--green-dark); text-decoration: underline; text-underline-offset: 3px; }
    .qr { width: 110px; border: 1px solid var(--line); background: #fff; padding: 5px; }
    .affiliate { display: flex; gap: 10px 18px; flex-wrap: wrap; padding: 20px 0; border-top: 1px solid var(--line); }
    .affiliate a { color: #45635b; font-size: 13px; text-decoration: underline; text-underline-offset: 3px; }
    .site-footer { margin-top: 0; padding: 22px 0; border-top: 1px solid var(--line); background: #eaf0e9; color: #36514b; font-size: 12px; }
    .footer-row { display: flex; justify-content: space-between; align-items: center; gap: 15px; flex-wrap: wrap; }
    .float-help { position: fixed; z-index: 15; right: 18px; bottom: 20px; display: grid; gap: 8px; }
    .float-help a { display: grid; place-items: center; min-width: 48px; min-height: 48px; padding: 0 12px; background: var(--green); color: #fff; box-shadow: 0 5px 18px rgba(24,48,46,.18); font-size: 12px; font-weight: 750; }
    .to-top { display: none !important; }
    .to-top.visible { display: grid !important; }
    [data-reveal] { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    [data-reveal].revealed { opacity: 1; transform: none; }
    @keyframes slowturn { to { transform: rotate(360deg); } }
    @media (max-width: 1000px) {
      .nav-links a { padding-inline: 7px; font-size: 12px; }
      .nav-cta { display: none; }
      .article-grid { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .nav-row { min-height: 66px; }
      .menu-toggle { display: inline-grid; place-items: center; }
      .nav-links { display: none; position: absolute; top: 66px; left: 0; right: 0; padding: 10px 16px 16px; background: var(--paper); border-bottom: 1px solid var(--line); align-items: stretch; flex-direction: column; }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 11px 6px; border-bottom: 1px solid #e6ece6; font-size: 14px; }
      .hero-inner { padding: 54px 0 34px; }
      .hero-grid, .intro-band, .workshop-layout, .rating-layout, .match-layout, .network-band { grid-template-columns: 1fr; gap: 25px; }
      .hero-art { min-height: 270px; }
      .orbit { width: 260px; }
      .ribbon-inner { align-items: flex-start; flex-direction: column; }
      .model-list { justify-content: flex-start; }
      section.content-section { padding: 55px 0; }
      .section-heading { align-items: flex-start; flex-direction: column; gap: 10px; }
      .feature-strip { grid-template-columns: repeat(2, 1fr); }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .industry-grid { grid-template-columns: repeat(2, 1fr); }
      .steps { grid-template-columns: repeat(2, 1fr); gap: 12px 20px; }
      .case-grid { grid-template-columns: 1fr; }
      .review-grid { grid-template-columns: repeat(2, 1fr); }
      .contact-band { grid-template-columns: 1fr; }
      .article-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 480px) {
      .hero-copy { font-size: 15px; }
      .hero-actions { align-items: stretch; flex-direction: column; }
      .hero-actions .button { width: 100%; }
      .service-grid, .review-grid, .industry-grid, .workshop-list, form { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .feature-strip { grid-template-columns: 1fr 1fr; }
      .metric { padding: 15px; }
      .metric strong { font-size: 19px; }
      .steps { grid-template-columns: 1fr 1fr; }
      .article-grid { grid-template-columns: 1fr; }
      .float-help { right: 10px; bottom: 12px; }
      .float-help a { min-width: 42px; min-height: 42px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      [data-reveal] { opacity: 1; transform: none; }
    }