:root {
      color-scheme: light;
      --ink: #282321;
      --muted: #6f6763;
      --paper: #f7f5f2;
      --white: #fff;
      --red: #c73530;
      --red-deep: #942b28;
      --rose: #f4e5e1;
      --line: #e7dfda;
      --green: #356b55;
      --shadow: 0 14px 40px rgba(55, 37, 31, .08);
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 86px; }
    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; }
    img { display: block; 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(255,255,255,.95); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
    .nav-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; flex: 0 0 auto; font-weight: 750; }
    .brand img { width: 40px; height: 40px; object-fit: contain; }
    .brand-name { font-size: 18px; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; color: #504844; font-size: 13px; }
    .nav-links a { padding: 8px 9px; border-radius: 4px; transition: background .2s, color .2s; }
    .nav-links a:hover { background: var(--rose); color: var(--red-deep); }
    .nav-cta, .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; font-weight: 700; cursor: pointer; transition: transform .2s, background .2s, box-shadow .2s; }
    .nav-cta, .button-primary { background: var(--red); color: #fff; }
    .nav-cta:hover, .button-primary:hover { background: var(--red-deep); box-shadow: 0 8px 18px rgba(199,53,48,.2); transform: translateY(-2px); }
    .button-secondary { border-color: #d5c9c2; background: #fff; color: var(--ink); }
    .button-secondary:hover { border-color: var(--red); color: var(--red-deep); transform: translateY(-2px); }
    .menu-toggle { display: none; width: 42px; height: 42px; background: #fff; color: var(--ink); border: 1px solid var(--line); border-radius: 4px; cursor: pointer; }
    .hero { overflow: hidden; position: relative; padding: 82px 0 56px; background: linear-gradient(120deg, #fff9f6 0%, #f7ece7 53%, #f3e6df 100%); border-bottom: 1px solid #eadbd5; }
    .hero::before { content: ""; position: absolute; inset: 0 0 0 auto; width: 46%; opacity: .42; background-image: linear-gradient(135deg, transparent 49.6%, rgba(173,47,43,.15) 50%, transparent 50.4%), linear-gradient(45deg, transparent 49.6%, rgba(173,47,43,.1) 50%, transparent 50.4%); background-size: 54px 54px; pointer-events: none; }
    .hero-inner { position: relative; display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(260px, .75fr); align-items: center; gap: 48px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 18px; color: var(--red-deep); font-size: 13px; font-weight: 750; letter-spacing: 0; }
    .eyebrow::before { content: ""; width: 24px; height: 2px; background: var(--red); }
    h1, h2, h3, p { margin-top: 0; }
    h1 { max-width: 700px; margin-bottom: 18px; font-size: clamp(38px, 5vw, 62px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 650px; margin-bottom: 26px; color: #574c47; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero-note { margin: 17px 0 0; color: var(--muted); font-size: 13px; }
    .hero-panel { position: relative; padding: 24px; background: rgba(255,255,255,.82); border: 1px solid rgba(148,43,40,.16); border-top: 3px solid var(--red); box-shadow: var(--shadow); }
    .hero-panel h2 { margin-bottom: 7px; font-size: 18px; }
    .hero-panel > p { margin-bottom: 19px; color: var(--muted); font-size: 13px; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-cloud span { padding: 6px 9px; color: #483b36; background: #f7f1ed; border: 1px solid #ebdfd9; border-radius: 3px; font-size: 12px; }
    .hero-bottom { position: relative; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 50px; background: rgba(255,255,255,.78); border: 1px solid rgba(148,43,40,.12); }
    .metric { padding: 18px 20px; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; color: var(--red-deep); font-size: 19px; }
    .metric span { color: var(--muted); font-size: 12px; }
    .section { padding: 72px 0; }
    .section-white { background: #fff; }
    .section-tint { background: #f1eae5; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .section-head h2 { max-width: 690px; margin-bottom: 0; font-size: clamp(27px, 3.4vw, 38px); line-height: 1.2; }
    .section-head p { max-width: 450px; margin: 0; color: var(--muted); font-size: 14px; }
    .kicker { margin-bottom: 8px; color: var(--red-deep); font-size: 12px; font-weight: 750; }
    .intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 54px; align-items: start; }
    .intro-copy { color: #554d48; }
    .intro-copy p:last-child { margin-bottom: 0; }
    .feature-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; margin: 0; padding: 0; list-style: none; }
    .feature-list li { padding: 14px 0; border-bottom: 1px solid var(--line); }
    .feature-list strong { display: block; margin-bottom: 4px; font-size: 14px; }
    .feature-list span { color: var(--muted); font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); }
    .service { min-height: 165px; padding: 21px; background: #fff; transition: background .2s, transform .2s; }
    .service:hover { position: relative; z-index: 1; background: #fffaf7; transform: translateY(-3px); }
    .service-index { display: block; margin-bottom: 13px; color: var(--red); font-size: 12px; font-weight: 750; }
    .service h3 { margin-bottom: 7px; font-size: 17px; }
    .service p { margin-bottom: 0; color: var(--muted); font-size: 13px; }
    .workbench { display: grid; grid-template-columns: 1.05fr .95fr; gap: 42px; align-items: center; }
    .workbench h2 { max-width: 520px; margin-bottom: 15px; font-size: 34px; line-height: 1.2; }
    .workbench-copy { color: var(--muted); }
    .workflow-list { margin: 24px 0 0; padding: 0; list-style: none; counter-reset: step; }
    .workflow-list li { position: relative; display: grid; grid-template-columns: 42px 1fr; gap: 14px; padding: 14px 0; border-top: 1px solid #dfd4ce; counter-increment: step; }
    .workflow-list li::before { content: "0" counter(step); color: var(--red); font-size: 13px; font-weight: 800; }
    .workflow-list strong { display: block; margin-bottom: 3px; }
    .workflow-list span { color: var(--muted); font-size: 13px; }
    .media-stack { display: grid; gap: 13px; }
    .media-stack img { width: 100%; border: 1px solid #ded4ce; object-fit: contain; background: #fff; }
    .media-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 13px; }
    .industry-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
    .industry { min-height: 120px; padding: 18px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); background: rgba(255,255,255,.58); }
    .industry strong { display: block; margin-bottom: 6px; }
    .industry span { color: var(--muted); font-size: 13px; }
    .network-strip { display: flex; flex-wrap: wrap; gap: 9px; }
    .network-strip span { padding: 7px 11px; background: #fff; border: 1px solid #e6d9d2; color: #4e413b; font-size: 13px; }
    .compare-layout { display: grid; grid-template-columns: minmax(220px, .7fr) 1.3fr; gap: 36px; align-items: start; }
    .score-panel { padding: 25px; background: var(--red-deep); color: #fff; }
    .score-panel .kicker { color: #ffe4db; }
    .score-panel strong { display: block; margin: 6px 0; font-size: 56px; line-height: 1; }
    .score-panel p { margin-bottom: 0; color: #f7ded7; font-size: 13px; }
    .stars { color: #ffd58a; font-size: 20px; letter-spacing: 0; }
    .table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--line); }
    table { width: 100%; border-collapse: collapse; text-align: left; font-size: 13px; }
    th, td { padding: 12px 14px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { background: #f6f1ed; color: #453933; font-size: 12px; }
    tbody tr:last-child td { border-bottom: 0; }
    td:last-child { color: var(--green); font-weight: 650; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .case { padding: 0 0 18px; border-bottom: 2px solid #d9c9c0; }
    .case img { width: 100%; margin-bottom: 14px; border: 1px solid var(--line); background: #fff; }
    .case h3 { margin-bottom: 6px; font-size: 17px; }
    .case p { margin-bottom: 0; color: var(--muted); font-size: 13px; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0 24px; }
    .review { padding: 20px 0; border-top: 1px solid var(--line); }
    .review blockquote { margin: 0 0 13px; color: #433a35; font-size: 14px; }
    .review cite { color: var(--muted); font-size: 12px; font-style: normal; }
    .match-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 46px; align-items: start; }
    .match-layout h2 { margin-bottom: 12px; font-size: 32px; line-height: 1.2; }
    .match-layout p { color: var(--muted); }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
    .field { display: grid; gap: 6px; }
    .field-full { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 650; }
    .field input, .field select, .field textarea { width: 100%; min-height: 44px; padding: 10px 12px; color: var(--ink); background: #fff; border: 1px solid #d9d0ca; border-radius: 3px; }
    .field textarea { min-height: 112px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid rgba(199,53,48,.25); border-color: var(--red); }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { position: relative; padding: 17px 34px 17px 0; cursor: pointer; font-weight: 680; list-style: none; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; right: 2px; top: 13px; color: var(--red); font-size: 21px; font-weight: 400; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-answer { max-width: 850px; padding: 0 0 17px; color: var(--muted); font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .article-link { display: flex; min-height: 104px; flex-direction: column; justify-content: space-between; padding: 15px; background: #fff; border: 1px solid var(--line); transition: border-color .2s, transform .2s; }
    .article-link:hover { border-color: var(--red); transform: translateY(-2px); }
    .article-link strong { font-size: 14px; }
    .article-link span { color: var(--red-deep); font-size: 12px; }
    .contact-band { padding: 30px; background: #f4e7e1; border-left: 4px solid var(--red); }
    .contact-grid { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 24px; }
    .contact-band h2 { margin-bottom: 7px; font-size: 25px; }
    .contact-band p { margin-bottom: 0; color: var(--muted); font-size: 14px; }
    .contact-details { display: flex; flex-wrap: wrap; gap: 10px 20px; margin-top: 17px; font-size: 13px; }
    .contact-details a { color: var(--red-deep); text-decoration: underline; text-underline-offset: 3px; }
    .footer { padding: 24px 0; background: #f0eae6; color: #3c332f; border-top: 1px solid var(--line); }
    .footer-main { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .footer p { margin: 0; font-size: 12px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; font-size: 12px; }
    .footer-links a { color: #554943; }
    .footer-links a:hover { color: var(--red-deep); }
    .floating-contact { position: fixed; right: 18px; bottom: 20px; z-index: 15; display: grid; gap: 8px; }
    .floating-contact a { display: inline-flex; align-items: center; justify-content: center; min-width: 48px; min-height: 44px; padding: 8px 12px; color: #fff; background: var(--red-deep); border: 1px solid rgba(255,255,255,.4); border-radius: 3px; box-shadow: 0 5px 16px rgba(53,30,27,.18); font-size: 12px; font-weight: 700; }
    .floating-contact a:hover { background: var(--red); }
    .reveal { opacity: 0; transform: translateY(14px); 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-row { flex-wrap: wrap; padding: 12px 0; }
      .menu-toggle { display: inline-grid; place-items: center; margin-left: auto; }
      .nav-cta { order: 2; }
      .nav-links { display: none; order: 3; width: 100%; justify-content: flex-start; padding: 7px 0 3px; border-top: 1px solid var(--line); }
      .nav-links.is-open { display: flex; }
      .hero-inner { gap: 28px; }
      .industry-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 720px) {
      .container { width: min(var(--container), calc(100% - 30px)); }
      .hero { padding: 56px 0 35px; }
      .hero-inner, .intro-grid, .workbench, .compare-layout, .match-layout { grid-template-columns: 1fr; }
      .hero-inner { gap: 30px; }
      .hero-panel { max-width: 100%; }
      .hero-bottom { grid-template-columns: 1fr 1fr; margin-top: 30px; }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      .section { padding: 54px 0; }
      .section-head { display: block; }
      .section-head p { margin-top: 12px; }
      .service-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
      .service { min-height: 0; padding: 17px; }
      .industry-grid { grid-template-columns: 1fr 1fr; }
      .case-grid, .reviews { grid-template-columns: 1fr 1fr; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .contact-grid { grid-template-columns: 1fr; }
      .footer-main { align-items: flex-start; flex-direction: column; }
      .floating-contact { right: 10px; bottom: 10px; }
      .floating-contact a { min-width: 42px; padding: 7px 9px; }
    }
    @media (max-width: 460px) {
      .brand-name { font-size: 16px; }
      .brand img { width: 34px; height: 34px; }
      .nav-cta { min-height: 40px; padding: 8px 11px; font-size: 12px; }
      .nav-links a { padding-inline: 8px; }
      .hero-actions .button { width: 100%; }
      .service-grid, .case-grid, .reviews, .feature-list, .form-grid { grid-template-columns: 1fr; }
      .field-full { grid-column: auto; }
      .media-pair { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: 1fr; }
      .score-panel strong { font-size: 48px; }
      .contact-band { padding: 22px 18px; }
    }