:root {
      color-scheme: light;
      --ink: #182323;
      --muted: #5d6a67;
      --paper: #f7f8f5;
      --white: #fff;
      --line: #dfe5df;
      --green: #167c63;
      --green-dark: #105a4b;
      --coral: #ed755d;
      --yellow: #f2c94c;
      --blue: #5797c2;
      --lilac: #9276bb;
      --container: 1160px;
      --shadow: 0 14px 36px rgba(24, 44, 36, .08);
    }

    * { 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", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; text-decoration: none; }
    button, input, select, textarea { font: inherit; }
    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(247,248,245,.96); border-bottom: 1px solid var(--line); }
    .nav-bar { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; font-weight: 800; font-size: 18px; }
    .brand img { width: 38px; height: 38px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex: 1; }
    .nav-links a { padding: 10px 9px; color: #42514d; font-size: 13px; white-space: nowrap; border-radius: 4px; transition: color .2s, background .2s; }
    .nav-links a:hover { color: var(--green-dark); background: #e9f1eb; }
    .nav-actions { display: flex; align-items: center; gap: 8px; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: var(--white); color: var(--ink); border-radius: 4px; padding: 8px 11px; cursor: pointer; }
    .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 10px 18px; border: 1px solid transparent; border-radius: 4px; background: var(--green); color: #fff; font-weight: 700; transition: transform .2s, background .2s, box-shadow .2s; cursor: pointer; }
    .button:hover { transform: translateY(-2px); background: var(--green-dark); box-shadow: 0 8px 18px rgba(22,124,99,.18); }
    .button-outline { background: transparent; border-color: #9cb5aa; color: var(--green-dark); }
    .button-outline:hover { background: #e9f1eb; box-shadow: none; }
    .button-coral { background: var(--coral); }
    .button-coral:hover { background: #d85d4a; }
    .hero { position: relative; overflow: hidden; background: #eaf3eb; border-bottom: 1px solid #dce8df; }
    .hero::before, .hero::after { content: ""; position: absolute; pointer-events: none; border: 1px solid rgba(22,124,99,.17); border-radius: 50%; }
    .hero::before { width: 490px; height: 490px; right: -130px; top: -240px; }
    .hero::after { width: 310px; height: 310px; right: -40px; top: -150px; border-color: rgba(237,117,93,.28); }
    .hero-inner { position: relative; z-index: 1; padding-top: 68px; padding-bottom: 34px; }
    .hero-copy { max-width: 760px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--green-dark); font-size: 13px; font-weight: 800; letter-spacing: .4px; }
    .eyebrow::before { content: ""; width: 22px; height: 3px; background: var(--coral); }
    h1 { max-width: 720px; margin: 15px 0 16px; font-size: clamp(38px, 6vw, 68px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy p { max-width: 650px; margin: 0; color: #45534e; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 27px; }
    .hero-note { margin-top: 14px !important; font-size: 13px !important; color: #61716a !important; }
    .hero-ribbon { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 54px; background: #cbd9d0; border: 1px solid #cbd9d0; }
    .ribbon-item { min-height: 92px; display: flex; align-items: center; gap: 12px; padding: 16px 20px; background: rgba(255,255,255,.74); }
    .ribbon-mark { width: 34px; height: 34px; display: grid; place-items: center; flex: 0 0 auto; border-radius: 50%; font-weight: 800; }
    .ribbon-item:nth-child(1) .ribbon-mark { background: #d7eee1; color: var(--green-dark); }
    .ribbon-item:nth-child(2) .ribbon-mark { background: #ffebe4; color: #ad4b37; }
    .ribbon-item:nth-child(3) .ribbon-mark { background: #fff3cb; color: #846100; }
    .ribbon-item:nth-child(4) .ribbon-mark { background: #e5edf7; color: #3d6687; }
    .ribbon-item strong { display: block; font-size: 14px; }
    .ribbon-item span:last-child { display: block; color: var(--muted); font-size: 12px; }
    .section { padding: 76px 0; }
    .section-tint { background: #eff3ef; border-top: 1px solid #e3e9e2; border-bottom: 1px solid #e3e9e2; }
    .section-head { max-width: 720px; margin-bottom: 30px; }
    .section-kicker { margin: 0 0 8px; color: var(--green); font-size: 12px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; }
    h2 { margin: 0; font-size: 32px; line-height: 1.25; letter-spacing: 0; }
    .section-head > p:last-child { margin: 12px 0 0; color: var(--muted); }
    .intro-layout { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: start; }
    .intro-copy p { margin: 0 0 16px; color: #4e5d58; }
    .intro-aside { padding: 22px 24px; background: #e2eee4; border-left: 4px solid var(--green); }
    .intro-aside strong { display: block; margin-bottom: 8px; font-size: 17px; }
    .intro-aside p { margin: 0; color: #4d5e55; }
    .metric-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; margin-top: 28px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .metric { padding: 18px 12px 18px 0; }
    .metric strong { display: block; color: var(--green-dark); font-size: 20px; }
    .metric span { color: var(--muted); font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .service-item { position: relative; padding: 22px; background: var(--white); border: 1px solid var(--line); border-top: 3px solid var(--accent, var(--green)); transition: transform .22s, box-shadow .22s; }
    .service-item:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
    .service-item h3 { margin: 0 0 8px; font-size: 18px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-tag { display: inline-block; margin-top: 14px; color: var(--green-dark); font-size: 12px; font-weight: 700; }
    .service-item:nth-child(4n+2) { --accent: var(--coral); }
    .service-item:nth-child(4n+3) { --accent: var(--yellow); }
    .service-item:nth-child(4n) { --accent: var(--blue); }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; }
    .workflow article { position: relative; padding: 22px 22px 20px 0; border-top: 1px solid #b9cbc0; counter-increment: step; }
    .workflow article::before { content: "0" counter(step); display: block; margin-bottom: 15px; color: var(--coral); font-size: 13px; font-weight: 800; }
    .workflow h3 { margin: 0 0 7px; font-size: 17px; }
    .workflow p { margin: 0; color: var(--muted); font-size: 14px; }
    .industry-strip { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 24px; }
    .industry-strip span { padding: 8px 12px; background: #fff; border: 1px solid var(--line); color: #3f514a; font-size: 13px; }
    .network-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
    .network-copy p { color: var(--muted); }
    .model-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
    .model-list span { padding: 7px 10px; background: #e6efe8; color: #32564a; font-size: 12px; }
    .network-panel { padding: 26px; background: #fff0e8; border: 1px solid #f1d6c9; }
    .network-panel h3 { margin: 0 0 10px; font-size: 19px; }
    .network-panel p { margin: 0; color: #66534c; }
    .network-panel .button { margin-top: 18px; }
    .case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .case-item { display: grid; grid-template-columns: minmax(0,1fr) minmax(130px,.72fr); gap: 18px; align-items: center; padding: 18px; background: #fff; border: 1px solid var(--line); }
    .media-frame { overflow: hidden; background: #e7eee9; }
    .media-frame img { display: block; width: 100%; height: auto; object-fit: contain; }
    .case-item h3 { margin: 0 0 8px; font-size: 17px; }
    .case-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .score-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 26px; align-items: start; }
    .score-panel { padding: 25px; background: #e5f0e8; border: 1px solid #d1e0d5; }
    .score-panel strong { display: block; color: var(--green-dark); font-size: 46px; line-height: 1.1; }
    .stars { margin: 9px 0; color: #bd8a00; font-size: 20px; letter-spacing: 2px; }
    .score-panel p { margin: 0; color: #50615a; font-size: 14px; }
    .comparison-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    .comparison { width: 100%; min-width: 610px; border-collapse: collapse; text-align: left; }
    .comparison th, .comparison td { padding: 12px 14px; border-bottom: 1px solid #e6ebe6; font-size: 13px; vertical-align: top; }
    .comparison th { background: #edf3ee; color: #2a493c; }
    .comparison tr:last-child td { border-bottom: 0; }
    .comparison td:first-child { font-weight: 700; }
    .reviews-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 13px; }
    .review { padding: 19px; background: #fff; border-left: 3px solid var(--accent, var(--green)); }
    .review:nth-child(3n+2) { --accent: var(--coral); }
    .review:nth-child(3n) { --accent: var(--blue); }
    .review p { margin: 0 0 14px; color: #465650; font-size: 14px; }
    .review strong { display: block; font-size: 13px; }
    .review span { color: var(--muted); font-size: 12px; }
    .review-note { margin: 15px 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 { position: relative; padding: 17px 42px 17px 0; cursor: pointer; list-style: none; font-weight: 700; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; right: 6px; top: 13px; color: var(--green); font-size: 24px; font-weight: 400; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { max-width: 820px; margin: 0; padding: 0 38px 18px 0; color: var(--muted); font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
    .article-link { display: flex; min-height: 85px; align-items: center; justify-content: space-between; gap: 10px; padding: 14px; background: #fff; border: 1px solid var(--line); font-size: 14px; font-weight: 700; transition: border-color .2s, transform .2s; }
    .article-link::after { content: "↗"; color: var(--green); }
    .article-link:hover { border-color: var(--green); transform: translateY(-2px); }
    .contact-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 40px; align-items: start; }
    .contact-details p { color: var(--muted); }
    .contact-list { margin: 22px 0 0; padding: 0; list-style: none; }
    .contact-list li { padding: 10px 0; border-bottom: 1px solid var(--line); }
    .contact-list strong { display: inline-block; min-width: 92px; }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 22px; background: #fff; border: 1px solid var(--line); }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field-wide { grid-column: 1 / -1; }
    .field label { color: #354640; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-height: 44px; padding: 10px 11px; border: 1px solid #cbd5ce; border-radius: 3px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 112px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid rgba(22,124,99,.2); border-color: var(--green); }
    .form-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; grid-column: 1 / -1; }
    .form-foot small { color: var(--muted); }
    .join-band { display: flex; align-items: center; justify-content: space-between; gap: 22px; padding: 26px 0; border-top: 1px solid var(--line); }
    .join-band h3 { margin: 0 0 4px; font-size: 19px; }
    .join-band p { margin: 0; color: var(--muted); font-size: 14px; }
    .site-footer { background: #e6ece7; color: #20332b; border-top: 1px solid #d5dfd7; }
    .footer-inner { padding: 30px 0 22px; }
    .footer-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 28px; }
    .footer-brand { max-width: 420px; }
    .footer-brand p { margin: 10px 0 0; color: #53615a; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 18px; max-width: 560px; }
    .footer-links a { color: #315649; font-size: 13px; text-decoration: underline; text-decoration-color: #a7b8ac; text-underline-offset: 3px; }
    .copyright { margin-top: 22px; padding-top: 14px; border-top: 1px solid #cbd7ce; color: #52605a; font-size: 12px; }
    .floating-help { position: fixed; z-index: 15; right: 18px; bottom: 20px; }
    .floating-help a { display: block; padding: 11px 14px; background: var(--green-dark); color: #fff; border-radius: 4px; box-shadow: 0 7px 18px rgba(12,61,48,.2); font-size: 13px; font-weight: 700; }
    .back-top { position: fixed; z-index: 15; right: 18px; bottom: 76px; width: 42px; height: 42px; display: grid; place-items: center; border: 1px solid #bdcbc1; background: #fff; color: var(--green-dark); border-radius: 4px; opacity: 0; pointer-events: none; transform: translateY(8px); transition: opacity .2s, transform .2s; cursor: pointer; }
    .back-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
    .reveal { opacity: 0; transform: translateY(13px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-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: 1000px) {
      .nav-links a { padding-inline: 6px; font-size: 12px; }
      .nav-actions .button-outline { display: none; }
      .hero-ribbon { grid-template-columns: repeat(2, 1fr); }
      .article-list { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .nav-bar { min-height: 64px; }
      .menu-toggle { display: inline-flex; align-items: center; gap: 7px; }
      .nav-actions { margin-left: auto; }
      .nav-actions .button { min-height: 40px; padding: 8px 11px; font-size: 13px; }
      .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; padding: 9px 16px 14px; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 12px 18px rgba(24,44,36,.08); }
      .nav-links.open { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); }
      .nav-links a { padding: 10px; font-size: 14px; }
      .hero-inner { padding-top: 49px; }
      .hero-ribbon { margin-top: 38px; }
      .section { padding: 56px 0; }
      h2 { font-size: 28px; }
      .intro-layout, .network-layout, .score-layout, .contact-layout { grid-template-columns: 1fr; gap: 22px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .workflow { grid-template-columns: repeat(2, 1fr); column-gap: 18px; }
      .case-grid { grid-template-columns: 1fr; }
      .reviews-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-top { display: block; }
      .footer-links { justify-content: flex-start; margin-top: 20px; }
    }
    @media (max-width: 480px) {
      .container { width: calc(100% - 28px); }
      .brand { font-size: 16px; }
      .brand img { width: 32px; height: 32px; }
      .nav-actions .button { padding-inline: 9px; }
      .hero-inner { padding-top: 42px; }
      h1 { font-size: 40px; }
      .hero-copy p { font-size: 15px; }
      .hero-ribbon { grid-template-columns: 1fr 1fr; }
      .ribbon-item { min-height: 82px; padding: 12px 10px; gap: 8px; }
      .ribbon-mark { width: 29px; height: 29px; }
      .ribbon-item strong { font-size: 12px; }
      .ribbon-item span:last-child { font-size: 11px; }
      .service-grid, .reviews-grid { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; }
      .case-item { grid-template-columns: 1fr; }
      .case-item .media-frame { max-width: 100%; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .contact-form { grid-template-columns: 1fr; padding: 16px; }
      .field-wide, .form-foot { grid-column: auto; }
      .form-foot { align-items: flex-start; flex-direction: column; }
      .join-band { align-items: flex-start; flex-direction: column; }
      .floating-help { right: 12px; bottom: 14px; }
      .back-top { right: 12px; bottom: 68px; }
    }