:root {
      color-scheme: light;
      --ink: #242638;
      --muted: #636779;
      --paper: #fffdf8;
      --line: #e9e7e1;
      --coral: #f45e62;
      --pink: #ffede7;
      --yellow: #ffe578;
      --mint: #c8f1df;
      --blue: #cdeaff;
      --violet: #e9dcff;
      --green: #245943;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 84px; }
    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; }
    .topbar { position: sticky; z-index: 20; top: 0; background: rgba(255,253,248,.96); border-bottom: 1px solid rgba(36,38,56,.08); backdrop-filter: blur(12px); }
    .nav { min-height: 74px; 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; }
    .brand img { width: 42px; max-height: 44px; object-fit: contain; }
    .brand span { font-size: 17px; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; }
    .nav-links a { padding: 10px 9px; font-size: 13px; color: #434556; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover { color: var(--coral); }
    .nav-cta, .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; border-radius: 7px; padding: 12px 18px; font-weight: 750; cursor: pointer; transition: transform .2s ease, box-shadow .2s ease, background .2s ease; }
    .nav-cta { flex: 0 0 auto; padding: 10px 15px; color: #fff; background: var(--ink); font-size: 13px; }
    .button:hover, .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 9px 22px rgba(36,38,56,.14); }
    .button-primary { background: var(--coral); color: white; box-shadow: 0 7px 18px rgba(244,94,98,.2); }
    .button-dark { background: var(--ink); color: #fff; }
    .button-light { border: 1px solid var(--line); background: #fff; color: var(--ink); }
    .menu-toggle { display: none; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 6px; width: 42px; height: 42px; cursor: pointer; }
    .hero { position: relative; overflow: hidden; padding: 72px 0 45px; background: linear-gradient(135deg, #fff5cf 0%, #fff8ee 50%, #ffe9e8 100%); }
    .hero::before, .hero::after { position: absolute; content: ""; pointer-events: none; border-radius: 50%; }
    .hero::before { width: 310px; height: 310px; right: -72px; top: -138px; border: 1px solid rgba(244,94,98,.23); box-shadow: 0 0 0 24px rgba(244,94,98,.04), 0 0 0 50px rgba(244,94,98,.035); }
    .hero::after { width: 110px; height: 110px; right: 14%; bottom: 25px; background: rgba(200,241,223,.7); }
    .hero-inner { position: relative; z-index: 1; max-width: 860px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 6px 11px; border: 1px solid rgba(36,38,56,.11); border-radius: 5px; background: rgba(255,255,255,.62); font-size: 12px; font-weight: 700; color: #5b5360; }
    .eyebrow i { width: 8px; height: 8px; border-radius: 50%; background: #45ad7b; }
    h1 { max-width: 780px; margin: 22px 0 15px; font-size: clamp(38px, 6vw, 68px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 690px; margin: 0; font-size: 17px; color: #545667; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
    .hero-note { margin-top: 18px; font-size: 13px; color: #696779; }
    .hero-strip { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 50px; border-top: 1px solid rgba(36,38,56,.14); }
    .hero-stat { padding: 17px 16px 0 0; }
    .hero-stat strong { display: block; font-size: 17px; }
    .hero-stat span { color: var(--muted); font-size: 12px; }
    .section { padding: 74px 0; }
    .section-tint { background: #fff8ed; }
    .section-mint { background: #effaf4; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 30px; }
    .section-head > div { max-width: 680px; }
    .kicker { margin: 0 0 8px; color: #d64e50; font-size: 12px; font-weight: 800; text-transform: uppercase; }
    h2 { margin: 0; font-size: clamp(27px, 4vw, 38px); line-height: 1.2; letter-spacing: 0; }
    .section-intro { margin: 11px 0 0; color: var(--muted); max-width: 680px; }
    .text-link { display: inline-flex; align-items: center; gap: 6px; color: #c9494c; font-weight: 750; white-space: nowrap; }
    .about-grid { display: grid; grid-template-columns: 1fr 1fr; align-items: start; gap: 46px; }
    .about-copy p { margin: 0 0 15px; color: #555868; }
    .about-copy p strong { color: var(--ink); }
    .about-points { display: grid; grid-template-columns: repeat(2, 1fr); gap: 13px; }
    .point { padding: 18px; border-top: 3px solid #f2b84c; background: #fff; }
    .point:nth-child(2) { border-color: #60bd91; }
    .point:nth-child(3) { border-color: #7bb7e4; }
    .point:nth-child(4) { border-color: #e890a0; }
    .point strong { display: block; margin-bottom: 4px; font-size: 15px; }
    .point span { color: var(--muted); font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 13px; }
    .service { min-height: 154px; padding: 19px; border: 1px solid rgba(36,38,56,.08); background: #fff; transition: transform .22s ease, box-shadow .22s ease; }
    .service:hover, .review:hover, .case-item:hover { transform: translateY(-4px); box-shadow: 0 12px 24px rgba(36,38,56,.08); }
    .service-mark { display: inline-flex; min-width: 36px; height: 30px; align-items: center; justify-content: center; padding: 0 7px; margin-bottom: 11px; border-radius: 4px; background: var(--pink); color: #ae454c; font-size: 12px; font-weight: 800; }
    .service:nth-child(4n+2) .service-mark { background: var(--mint); color: #276a4d; }
    .service:nth-child(4n+3) .service-mark { background: var(--blue); color: #315e83; }
    .service:nth-child(4n) .service-mark { background: var(--violet); color: #5b467e; }
    .service h3, .flow-step h3, .case-item h3 { margin: 0 0 6px; font-size: 16px; }
    .service p, .case-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-more { display: flex; align-items: center; justify-content: space-between; gap: 15px; margin-top: 20px; padding-top: 16px; border-top: 1px solid var(--line); color: var(--muted); font-size: 13px; }
    .chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 22px; }
    .chip { padding: 6px 10px; border: 1px solid #e7e2d9; background: #fff; color: #555868; font-size: 12px; }
    .split-feature { display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 44px; }
    .feature-copy p { color: var(--muted); }
    .feature-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 22px; padding: 0; margin: 22px 0; list-style: none; }
    .feature-list li { display: flex; align-items: flex-start; gap: 9px; color: #454858; font-size: 14px; }
    .feature-list li::before { content: "✓"; color: #329566; font-weight: 900; }
    .feature-visual { padding: 28px; background: #fff0c9; border-left: 5px solid #f0bd39; }
    .feature-visual .big-label { font-size: 12px; font-weight: 800; color: #816522; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; }
    .flow-step { position: relative; padding: 19px 20px 10px 0; border-top: 1px solid #c6d9ce; counter-increment: step; }
    .flow-step::before { content: "0" counter(step); display: block; width: max-content; margin: -32px 0 16px; padding: 4px 7px; background: var(--paper); color: #31825c; font-size: 13px; font-weight: 850; }
    .flow-step p { margin: 0; color: var(--muted); font-size: 13px; }
    .industry-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px 26px; }
    .industry { padding: 17px 0; border-bottom: 1px solid rgba(36,38,56,.12); }
    .industry h3 { margin: 0 0 6px; font-size: 16px; }
    .industry p { margin: 0; color: var(--muted); font-size: 13px; }
    .network-band { display: grid; grid-template-columns: 1fr 1.2fr; align-items: center; gap: 38px; }
    .network-copy p { color: var(--muted); }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-cloud span { padding: 7px 10px; border: 1px solid #d9e9de; background: #fff; color: #3e5a4c; font-size: 12px; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .case-item { background: white; border-bottom: 3px solid #f2c24a; transition: transform .22s ease, box-shadow .22s ease; }
    .case-item:nth-child(2) { border-color: #69bd91; }
    .case-item:nth-child(3) { border-color: #ee9297; }
    .case-item .media { aspect-ratio: 16 / 9; overflow: hidden; background: #f4f0e9; }
    .case-item .media img { width: 100%; height: 100%; object-fit: cover; display: block; }
    .case-item .case-copy { padding: 17px 18px 19px; }
    .case-item .media-square { aspect-ratio: 1 / 1; max-width: 180px; margin: 18px auto 0; }
    .comparison { display: grid; grid-template-columns: .72fr 1.28fr; gap: 30px; align-items: stretch; }
    .score-panel { display: flex; flex-direction: column; justify-content: space-between; padding: 26px; background: var(--ink); color: #fff; }
    .score-panel p { color: #e1e1e8; }
    .score { font-size: 56px; font-weight: 850; line-height: 1; }
    .stars { color: #ffdb62; letter-spacing: 0; font-size: 21px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; border-collapse: collapse; min-width: 590px; text-align: left; }
    th, td { padding: 13px 15px; border-bottom: 1px solid #efede8; vertical-align: top; font-size: 13px; }
    th { background: #fff4dc; font-size: 12px; }
    td:first-child { width: 25%; font-weight: 750; }
    .positive { color: #287550; font-weight: 700; }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { padding: 20px; border: 1px solid #ece8df; background: #fff; transition: transform .22s ease, box-shadow .22s ease; }
    .review blockquote { margin: 0; color: #4e5160; font-size: 14px; }
    .review footer { display: flex; align-items: center; justify-content: space-between; gap: 10px; margin-top: 17px; color: var(--ink); font-size: 13px; font-weight: 750; }
    .review footer span { color: #777988; font-size: 12px; font-weight: 500; }
    .timeline { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
    .timeline-item { padding-top: 14px; border-top: 3px solid #efc546; }
    .timeline-item:nth-child(2) { border-color: #e78893; }
    .timeline-item:nth-child(3) { border-color: #69b991; }
    .timeline-item:nth-child(4) { border-color: #78b5dc; }
    .timeline-item strong { display: block; margin-bottom: 6px; }
    .timeline-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .match-layout { display: grid; grid-template-columns: .8fr 1.2fr; align-items: start; gap: 40px; }
    .match-aside p { color: var(--muted); }
    .match-aside ul { padding-left: 18px; color: #4e5160; font-size: 14px; }
    .form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; border: 1px solid #dcdad4; border-radius: 4px; background: #fff; color: var(--ink); padding: 11px 12px; outline: none; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: #56a77d; box-shadow: 0 0 0 3px rgba(86,167,125,.14); }
    .field textarea { min-height: 110px; resize: vertical; }
    .form-note { grid-column: 1 / -1; margin: -2px 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; cursor: pointer; padding: 17px 40px 17px 0; font-weight: 750; list-style: none; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; right: 5px; top: 12px; color: #cf5659; font-size: 23px; font-weight: 500; transition: transform .2s ease; }
    .faq-item[open] summary::after { transform: rotate(45deg); }
    .faq-item p { max-width: 850px; margin: -3px 0 18px; color: var(--muted); font-size: 14px; }
    .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 { padding: 17px 14px; border-right: 1px solid var(--line); font-size: 14px; font-weight: 700; transition: background .2s ease; }
    .article-list a:last-child { border-right: 0; }
    .article-list a:hover { background: #fff0e9; }
    .article-list span { display: block; margin-top: 5px; color: var(--muted); font-size: 12px; font-weight: 500; }
    .knowledge-strip { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; }
    .knowledge-strip p { margin: 10px 0 0; color: var(--muted); font-size: 14px; }
    .contact-row { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
    .contact-details { display: grid; grid-template-columns: 1fr 1fr; gap: 15px 22px; margin-top: 22px; }
    .contact-details div { border-bottom: 1px solid var(--line); padding-bottom: 10px; }
    .contact-details strong { display: block; font-size: 12px; color: #777988; }
    .contact-details a, .contact-details span { font-size: 14px; font-weight: 700; }
    .qr-wrap { display: flex; align-items: center; gap: 16px; margin-top: 23px; }
    .qr-wrap img { width: 112px; aspect-ratio: 1; object-fit: contain; border: 1px solid var(--line); background: #fff; }
    .qr-wrap span { color: var(--muted); font-size: 13px; }
    .affiliate { padding: 24px 0 30px; border-top: 1px solid var(--line); background: #fff8ed; }
    .affiliate h2 { font-size: 17px; }
    .friend-links { display: flex; flex-wrap: wrap; gap: 8px 18px; margin-top: 12px; }
    .friend-links a { color: #4d5960; font-size: 13px; text-decoration: underline; text-decoration-color: #d9c9a4; text-underline-offset: 3px; }
    .footer { padding: 20px 0; background: #fffdf8; border-top: 1px solid var(--line); color: #525463; }
    .footer-inner { display: flex; justify-content: space-between; align-items: center; gap: 15px; font-size: 12px; }
    .footer p { margin: 0; }
    .footer a { color: #343748; font-weight: 650; }
    .floating { position: fixed; right: 18px; bottom: 20px; z-index: 15; display: flex; flex-direction: column; gap: 8px; }
    .float-link { display: inline-flex; align-items: center; justify-content: center; min-width: 46px; min-height: 44px; padding: 0 12px; border: 1px solid rgba(36,38,56,.14); background: #fff; color: var(--ink); box-shadow: 0 4px 15px rgba(36,38,56,.12); font-size: 12px; font-weight: 750; }
    .float-link:first-child { background: var(--coral); border-color: var(--coral); color: #fff; }
    .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: 1050px) {
      .nav-links a { padding-inline: 6px; font-size: 12px; }
      .service-grid { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 820px) {
      .nav { min-height: 66px; }
      .menu-toggle { display: inline-flex; align-items: center; justify-content: center; order: 3; }
      .nav-cta { margin-left: auto; }
      .nav-links { display: none; position: absolute; top: 65px; left: 0; right: 0; padding: 10px 20px 15px; align-items: stretch; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 12px 18px rgba(36,38,56,.07); }
      .nav-links.is-open { display: grid; grid-template-columns: repeat(2, 1fr); }
      .nav-links a { padding: 10px 8px; font-size: 14px; }
      .about-grid, .split-feature, .network-band, .comparison, .match-layout, .contact-row { grid-template-columns: 1fr; }
      .industry-grid { grid-template-columns: repeat(2, 1fr); }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .review-grid { grid-template-columns: repeat(2, 1fr); }
      .case-grid { grid-template-columns: repeat(2, 1fr); }
      .timeline { grid-template-columns: repeat(2, 1fr); row-gap: 27px; }
      .article-list { grid-template-columns: repeat(2, 1fr); }
      .article-list a:nth-child(2n) { border-right: 0; }
      .article-list a { border-bottom: 1px solid var(--line); }
    }
    @media (max-width: 560px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .brand img { width: 36px; }
      .brand span { font-size: 15px; }
      .nav-cta { padding: 9px 11px; font-size: 12px; }
      .hero { padding: 55px 0 32px; }
      h1 { font-size: 42px; }
      .hero-copy { font-size: 15px; }
      .hero-strip { grid-template-columns: repeat(2, 1fr); row-gap: 14px; margin-top: 35px; }
      .hero-stat { padding-right: 8px; }
      .section { padding: 54px 0; }
      .section-head { display: block; }
      .section-head .text-link { margin-top: 15px; }
      .about-points { gap: 9px; }
      .point { padding: 14px; }
      .service-grid, .review-grid, .case-grid, .industry-grid, .timeline, .knowledge-strip { grid-template-columns: 1fr; }
      .service { min-height: 0; }
      .feature-list { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; gap: 18px 10px; }
      .workflow .flow-step { margin-top: 10px; }
      .score-panel { gap: 18px; }
      .form { grid-template-columns: 1fr; }
      .field.full, .form-note { grid-column: auto; }
      .contact-details { grid-template-columns: 1fr 1fr; gap: 12px; }
      .footer-inner { align-items: flex-start; flex-direction: column; }
      .floating { right: 10px; bottom: 12px; }
      .float-link { min-width: 42px; min-height: 40px; padding: 0 9px; }
      .article-list { grid-template-columns: 1fr; }
      .article-list a { border-right: 0; }
    }