:root {
      color-scheme: light;
      --ink: #17202c;
      --muted: #596574;
      --line: #dce2e8;
      --paper: #f7f8fa;
      --white: #fff;
      --navy: #182d48;
      --blue: #316ee8;
      --coral: #f15b4a;
      --lime: #d9f15a;
      --teal: #c9f0e7;
      --max: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: Inter, -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 { max-width: 100%; height: auto; }
    .container { width: min(var(--max), calc(100% - 40px)); margin-inline: auto; }
    .site-header { position: sticky; top: 0; z-index: 20; background: rgba(247,248,250,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
    .header-inner { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; flex: 0 0 auto; font-weight: 800; font-size: 18px; }
    .brand img { width: 42px; height: 42px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; }
    .nav-links a { padding: 10px 12px; color: #3f4b5a; font-size: 13px; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover { color: var(--blue); }
    .nav-action, .button { display: inline-flex; align-items: center; justify-content: center; gap: 9px; min-height: 46px; padding: 0 20px; border: 0; border-radius: 4px; background: var(--blue); color: #fff; font-weight: 700; transition: transform .2s ease, background .2s ease, box-shadow .2s ease; cursor: pointer; }
    .nav-action { min-height: 40px; padding-inline: 15px; font-size: 13px; white-space: nowrap; }
    .button:hover, .nav-action:hover { transform: translateY(-2px); background: #235dcc; box-shadow: 0 8px 18px rgba(49,110,232,.2); }
    .button.secondary { background: var(--white); color: var(--ink); border: 1px solid var(--line); }
    .button.secondary:hover { background: #eef2f8; box-shadow: none; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 4px; background: #fff; color: var(--ink); cursor: pointer; }
    .menu-toggle span { display: block; width: 17px; height: 2px; margin: 4px auto; background: currentColor; }
    .hero { position: relative; overflow: hidden; padding: 76px 0 54px; background: var(--navy); color: #fff; }
    .hero::before { content: ""; position: absolute; inset: 0; background: linear-gradient(112deg, rgba(49,110,232,.14), transparent 48%), repeating-linear-gradient(90deg, transparent 0, transparent 79px, rgba(255,255,255,.045) 80px); pointer-events: none; }
    .hero-grid { position: relative; display: grid; grid-template-columns: minmax(0,1.2fr) minmax(300px,.8fr); gap: 56px; align-items: center; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; margin: 0 0 20px; color: var(--lime); font-size: 13px; font-weight: 800; letter-spacing: 0; }
    .eyebrow::before { content: ""; width: 24px; height: 2px; background: currentColor; }
    h1 { max-width: 680px; margin: 0; font-size: clamp(38px, 5vw, 62px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 610px; margin: 22px 0 28px; color: #d5dce6; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .hero .button.secondary { background: transparent; border-color: #8391a3; color: #fff; }
    .hero .button.secondary:hover { background: rgba(255,255,255,.1); }
    .hero-art { position: relative; min-height: 305px; display: grid; align-content: center; padding: 30px; border: 1px solid rgba(255,255,255,.2); background: rgba(255,255,255,.06); }
    .hero-art::after { content: ""; position: absolute; right: -1px; top: -1px; width: 80px; height: 80px; background: var(--coral); clip-path: polygon(100% 0,100% 100%,0 0); }
    .art-label { margin: 0 0 20px; color: #cad5e3; font-size: 12px; text-transform: uppercase; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 9px; }
    .model-cloud span { padding: 7px 10px; border: 1px solid rgba(255,255,255,.2); color: #f7f8fa; font-size: 12px; }
    .model-cloud span:nth-child(3n+1) { color: var(--lime); border-color: rgba(217,241,90,.55); }
    .hero-note { margin: 22px 0 0; color: #cad5e3; font-size: 13px; }
    .metrics { position: relative; display: grid; grid-template-columns: repeat(4,1fr); margin-top: 40px; border-top: 1px solid rgba(255,255,255,.2); }
    .metric { padding: 20px 16px 0 0; }
    .metric strong { display: block; color: var(--lime); font-size: 22px; line-height: 1.25; }
    .metric span { color: #cad5e3; font-size: 12px; }
    .home-link { text-decoration: underline; text-underline-offset: 3px; }
    main { overflow: hidden; }
    section { scroll-margin-top: 88px; }
    .section { padding: 78px 0; }
    .section.white { background: #fff; }
    .section.dark { background: #182d48; color: #fff; }
    .section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .section-heading h2 { margin: 0; font-size: clamp(27px, 3.5vw, 40px); line-height: 1.2; letter-spacing: 0; }
    .section-heading p { max-width: 540px; margin: 0; color: var(--muted); }
    .dark .section-heading p { color: #c4d0df; }
    .kicker { display: block; margin-bottom: 9px; color: var(--coral); font-size: 12px; font-weight: 800; text-transform: uppercase; }
    .intro-grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 48px; align-items: start; }
    .intro-lead { margin: 0; font-size: 22px; line-height: 1.5; font-weight: 700; }
    .intro-copy { margin: 0; color: var(--muted); }
    .feature-strip { display: grid; grid-template-columns: repeat(3,1fr); gap: 0; margin-top: 34px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .feature-strip article { padding: 22px 24px 22px 0; }
    .feature-strip article + article { padding-left: 24px; border-left: 1px solid var(--line); }
    .feature-strip h3 { margin: 0 0 6px; font-size: 16px; }
    .feature-strip p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .service { min-width: 0; padding: 21px; border: 1px solid var(--line); background: #fff; transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
    .service:hover { transform: translateY(-3px); border-color: #a9bde0; box-shadow: 0 12px 24px rgba(23,32,44,.07); }
    .service-top { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
    .service h3 { margin: 0; font-size: 17px; }
    .service-no { color: var(--coral); font-size: 12px; font-weight: 800; }
    .service p { margin: 10px 0 0; color: var(--muted); font-size: 13px; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 24px; }
    .tag-cloud span { padding: 7px 11px; border: 1px solid #cad3dd; background: #fff; color: #344253; font-size: 12px; }
    .workflow { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; counter-reset: step; }
    .workflow article { position: relative; padding: 0 22px 0 0; counter-increment: step; }
    .workflow article::before { content: "0" counter(step); display: block; width: max-content; margin-bottom: 17px; color: var(--blue); font-size: 13px; font-weight: 800; }
    .workflow article::after { content: ""; position: absolute; left: 38px; right: 12px; top: 10px; border-top: 1px solid #b9c4d0; }
    .workflow article:last-child::after { display: none; }
    .workflow h3 { margin: 0 0 7px; font-size: 16px; }
    .workflow p { margin: 0; color: var(--muted); font-size: 13px; }
    .industry-list { display: grid; grid-template-columns: repeat(4,1fr); gap: 1px; background: rgba(255,255,255,.18); border: 1px solid rgba(255,255,255,.18); }
    .industry-list article { padding: 20px; background: var(--navy); }
    .industry-list h3 { margin: 0 0 7px; color: var(--lime); font-size: 15px; }
    .industry-list p { margin: 0; color: #d1d9e4; font-size: 12px; }
    .image-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .media-item { margin: 0; background: #e8ebef; }
    .media-item img { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
    .media-item figcaption { padding: 12px 15px; background: #fff; color: var(--muted); font-size: 13px; }
    .square-media { max-width: 360px; }
    .square-media img { aspect-ratio: 1; }
    .compare-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 34px; align-items: start; }
    .score-panel { padding: 27px; background: var(--lime); color: var(--ink); }
    .score-panel span { font-size: 13px; font-weight: 700; }
    .score { margin: 7px 0; font-size: 48px; font-weight: 850; line-height: 1; }
    .stars { color: #17202c; letter-spacing: 2px; font-size: 19px; }
    .score-panel p { margin: 15px 0 0; font-size: 13px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; min-width: 620px; border-collapse: collapse; text-align: left; }
    th, td { padding: 13px 15px; border-bottom: 1px solid var(--line); font-size: 13px; vertical-align: top; }
    th { background: #edf1f6; color: #27374b; font-weight: 800; }
    tr:last-child td { border-bottom: 0; }
    .good { color: #157253; font-weight: 700; }
    .case-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
    .case { padding: 22px; border-top: 3px solid var(--coral); background: #fff; }
    .case:nth-child(2) { border-color: var(--blue); }
    .case:nth-child(3) { border-color: #a6bf27; }
    .case h3 { margin: 0 0 9px; font-size: 17px; }
    .case p { margin: 0; color: var(--muted); font-size: 13px; }
    .reviews { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .review { padding: 20px; border: 1px solid rgba(255,255,255,.2); background: rgba(255,255,255,.05); }
    .review p { margin: 0 0 17px; color: #e0e6ed; font-size: 14px; }
    .review strong { color: var(--lime); font-size: 12px; }
    .review span { display: block; color: #aebdce; font-size: 11px; }
    .article-list { display: grid; grid-template-columns: repeat(5,1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .article-list a { min-height: 96px; display: flex; flex-direction: column; justify-content: space-between; padding: 16px; border-right: 1px solid var(--line); transition: background .2s ease; }
    .article-list a:last-child { border-right: 0; }
    .article-list a:hover { background: #eef3fb; }
    .article-list strong { font-size: 13px; }
    .article-list span { color: var(--muted); font-size: 11px; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-list details { border-bottom: 1px solid var(--line); }
    .faq-list summary { position: relative; padding: 17px 38px 17px 0; cursor: pointer; list-style: none; font-weight: 700; }
    .faq-list summary::-webkit-details-marker { display: none; }
    .faq-list summary::after { content: "+"; position: absolute; right: 4px; top: 13px; color: var(--blue); font-size: 23px; font-weight: 400; }
    .faq-list details[open] summary::after { content: "−"; }
    .faq-list details p { max-width: 850px; margin: -3px 0 18px; color: var(--muted); font-size: 14px; }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 50px; align-items: start; }
    .contact-copy h2 { margin: 0 0 14px; font-size: 35px; line-height: 1.2; }
    .contact-copy > p { margin: 0 0 24px; color: var(--muted); }
    .contact-details { display: grid; gap: 9px; color: #344253; font-size: 14px; }
    .contact-details a { text-decoration: underline; text-underline-offset: 3px; }
    .qr-box { display: flex; align-items: center; gap: 15px; margin-top: 22px; }
    .qr-box img { width: 112px; border: 1px solid var(--line); background: #fff; }
    .qr-box span { color: var(--muted); font-size: 12px; }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { color: #344253; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-width: 0; padding: 12px; border: 1px solid #cbd3dc; 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(49,110,232,.22); border-color: var(--blue); }
    .form-submit { margin-top: 16px; }
    .footer { padding: 27px 0; background: #edf0f4; color: #263447; border-top: 1px solid var(--line); }
    .footer-top { display: flex; align-items: start; justify-content: space-between; gap: 25px; }
    .footer-brand { font-weight: 800; }
    .footer p { margin: 5px 0 0; color: #536071; font-size: 12px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; color: #344253; font-size: 12px; }
    .footer-links a { text-decoration: underline; text-underline-offset: 3px; }
    .footer-bottom { margin-top: 18px; padding-top: 14px; border-top: 1px solid #d4dae1; color: #5b6572; font-size: 11px; }
    .float-contact { position: fixed; z-index: 15; right: 18px; bottom: 20px; display: flex; flex-direction: column; gap: 8px; }
    .float-contact a { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 0 14px; border: 1px solid #d5dce4; background: #fff; color: var(--ink); box-shadow: 0 4px 15px rgba(23,32,44,.12); font-size: 12px; font-weight: 700; }
    .float-contact a:first-child { border-color: var(--blue); background: var(--blue); color: #fff; }
    .back-top { display: none !important; }
    .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: 980px) {
      .menu-toggle { display: block; margin-left: auto; }
      .nav-action { display: none; }
      .header-inner { position: relative; }
      .nav-links { display: none; position: absolute; top: calc(100% - 1px); left: 0; right: 0; align-items: stretch; flex-direction: column; padding: 9px 15px 15px; border: 1px solid var(--line); border-top: 0; background: var(--paper); }
      .nav-links.open { display: flex; }
      .nav-links a { padding: 10px 4px; border-bottom: 1px solid #e2e6eb; }
      .hero-grid { gap: 28px; }
      .industry-list { grid-template-columns: repeat(2,1fr); }
      .article-list { grid-template-columns: repeat(3,1fr); }
      .article-list a:nth-child(3) { border-right: 0; }
      .article-list a:nth-child(n+4) { border-top: 1px solid var(--line); }
    }
    @media (max-width: 700px) {
      .container { width: min(var(--max), calc(100% - 30px)); }
      .header-inner { min-height: 66px; }
      .brand { font-size: 16px; }
      .brand img { width: 36px; height: 36px; }
      .hero { padding: 55px 0 35px; }
      .hero-grid, .intro-grid, .compare-layout, .contact-grid { grid-template-columns: 1fr; }
      .hero-grid { gap: 30px; }
      .hero-art { min-height: 0; padding: 22px; }
      .hero-copy { font-size: 15px; }
      .metrics { grid-template-columns: repeat(2,1fr); }
      .metric { padding: 15px 8px 0 0; }
      .section { padding: 56px 0; }
      .section-heading { display: block; }
      .section-heading p { margin-top: 12px; }
      .feature-strip { grid-template-columns: 1fr; }
      .feature-strip article, .feature-strip article + article { padding: 16px 0; border-left: 0; }
      .feature-strip article + article { border-top: 1px solid var(--line); }
      .service-grid, .case-grid, .reviews { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; gap: 26px 12px; }
      .workflow article::after { display: none; }
      .industry-list { grid-template-columns: 1fr 1fr; }
      .industry-list article { padding: 15px; }
      .image-grid { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .article-list a, .article-list a:nth-child(3) { min-height: 84px; border-right: 1px solid var(--line); }
      .article-list a:nth-child(2n) { border-right: 0; }
      .article-list a:nth-child(n+3) { border-top: 1px solid var(--line); }
      .form-grid { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .footer-top { flex-direction: column; }
      .float-contact { right: 10px; bottom: 12px; flex-direction: row; }
      .float-contact a { min-height: 39px; padding: 0 11px; }
    }