:root {
      color-scheme: light;
      --ink: #16243a;
      --muted: #5e6b7d;
      --blue: #164fc3;
      --blue-dark: #103b91;
      --sky: #eaf2ff;
      --line: #dce4ef;
      --paper: #fff;
      --bg: #f5f8fc;
      --teal: #087e83;
      --gold: #f0b429;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 82px; }
    body {
      margin: 0;
      background: var(--bg);
      color: var(--ink);
      font-family: Inter, "PingFang SC", "Microsoft YaHei", Arial, 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; }
    .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,.96);
      border-bottom: 1px solid var(--line);
      backdrop-filter: blur(12px);
    }
    .header-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 800; white-space: nowrap; }
    .brand img { display: block; width: 38px; height: 38px; object-fit: contain; }
    .brand-name { font-size: 17px; line-height: 1.2; }
    .brand-name small { display: block; color: var(--muted); font-size: 10px; font-weight: 600; letter-spacing: 0; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 9px 10px; color: #3b4a60; font-size: 13px; border-radius: 5px; transition: color .2s, background .2s; }
    .nav-links a:hover { color: var(--blue); background: var(--sky); }
    .nav-actions { display: flex; align-items: center; gap: 9px; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: #fff; color: var(--ink); width: 42px; height: 42px; border-radius: 6px; font-size: 20px; cursor: pointer; }
    .btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; min-height: 44px; padding: 10px 17px; border: 1px solid transparent; border-radius: 5px; font-weight: 700; font-size: 14px; cursor: pointer; transition: transform .2s, background .2s, box-shadow .2s; }
    .btn:hover { transform: translateY(-2px); }
    .btn-primary { background: var(--blue); color: #fff; box-shadow: 0 7px 18px rgba(22,79,195,.18); }
    .btn-primary:hover { background: var(--blue-dark); box-shadow: 0 9px 22px rgba(22,79,195,.27); }
    .btn-light { background: #fff; color: var(--blue); border-color: #cbd9f2; }
    .btn-outline { background: transparent; border-color: #afc3e6; color: var(--blue-dark); }
    .hero {
      overflow: hidden;
      position: relative;
      background: linear-gradient(112deg, #edf4ff 0%, #f7faff 58%, #e6f5f4 100%);
      border-bottom: 1px solid #d9e5f7;
    }
    .hero-inner { position: relative; padding-block: 76px 50px; }
    .hero-inner::before {
      content: "";
      position: absolute;
      right: 5%;
      top: 51px;
      width: 260px;
      height: 260px;
      border: 1px solid rgba(22,79,195,.17);
      border-radius: 50%;
      box-shadow: 0 0 0 30px rgba(22,79,195,.035), 0 0 0 62px rgba(8,126,131,.035);
      pointer-events: none;
    }
    .hero-copy { position: relative; max-width: 750px; z-index: 1; }
    .eyebrow { display: inline-flex; align-items: center; gap: 8px; color: var(--blue); font-weight: 800; font-size: 12px; letter-spacing: 0; }
    .eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--teal); }
    h1 { max-width: 690px; margin: 16px 0 15px; font-size: clamp(38px, 6vw, 62px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy p { max-width: 630px; margin: 0; color: #485971; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
    .hero-points { display: flex; flex-wrap: wrap; gap: 10px 24px; margin: 25px 0 0; padding: 0; list-style: none; color: #42526a; font-size: 13px; }
    .hero-points li::before { content: "✓"; margin-right: 8px; color: var(--teal); font-weight: 800; }
    .hero-band { position: relative; margin-top: 54px; display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid #d4e0f2; background: rgba(255,255,255,.78); }
    .metric { padding: 18px 22px; border-right: 1px solid #dce5f1; }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; color: var(--blue-dark); font-size: 16px; }
    .metric span { color: var(--muted); font-size: 12px; }
    .section { padding: 68px 0; }
    .section-white { background: #fff; }
    .section-tint { background: #eef4fc; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin-bottom: 28px; }
    .section-head > div { max-width: 690px; }
    .kicker { margin: 0 0 6px; color: var(--teal); font-size: 12px; font-weight: 800; }
    h2 { margin: 0; font-size: 30px; line-height: 1.25; letter-spacing: 0; }
    .section-head p { margin: 9px 0 0; color: var(--muted); }
    .text-link { color: var(--blue); font-weight: 700; font-size: 14px; white-space: nowrap; }
    .intro-layout { display: grid; grid-template-columns: 1.25fr .75fr; gap: 42px; align-items: start; }
    .intro-copy p { margin: 0 0 15px; color: #4b5b71; }
    .intro-copy strong { color: var(--ink); }
    .intro-aside { padding: 22px 24px; border-left: 3px solid var(--teal); background: #f2f7fb; }
    .intro-aside h3 { margin: 0 0 11px; font-size: 17px; }
    .plain-list { display: grid; gap: 9px; margin: 0; padding: 0; list-style: none; color: #4b5b71; font-size: 14px; }
    .plain-list li::before { content: "—"; color: var(--blue); margin-right: 9px; }
    .service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
    .service-item { min-height: 150px; padding: 19px; background: #fff; border: 1px solid var(--line); border-top: 3px solid #2863ce; transition: transform .2s, box-shadow .2s; }
    .service-item:hover { transform: translateY(-4px); box-shadow: 0 12px 25px rgba(25,55,100,.09); }
    .service-item h3 { margin: 0 0 7px; font-size: 16px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-num { color: #7c91b2; font-size: 11px; font-weight: 800; }
    .model-line { margin-top: 24px; padding: 20px 22px; background: #e4efff; border-left: 3px solid var(--blue); }
    .model-line strong { display: block; margin-bottom: 8px; font-size: 14px; }
    .model-line p { margin: 0; color: #45566f; font-size: 13px; }
    .tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 13px; }
    .tag-list span { padding: 5px 9px; background: #fff; border: 1px solid #d0def1; color: #34465f; font-size: 12px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; }
    .workflow article { position: relative; padding: 20px 23px 18px 0; border-top: 1px solid #aebfd8; counter-increment: step; }
    .workflow article::before { content: "0" counter(step); display: block; margin-top: -33px; margin-bottom: 15px; color: var(--blue); font-size: 13px; font-weight: 800; background: var(--bg); width: 38px; }
    .workflow h3 { margin: 0 0 6px; font-size: 16px; }
    .workflow p { margin: 0; color: var(--muted); font-size: 13px; }
    .industry-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; }
    .industry-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 24px; margin: 0; padding: 0; list-style: none; }
    .industry-list li { padding: 12px 0; border-bottom: 1px solid var(--line); color: #43536a; font-size: 14px; }
    .industry-list strong { color: var(--ink); }
    .service-network { padding: 24px; background: #123e91; color: #fff; }
    .service-network h3 { margin: 0 0 10px; font-size: 19px; }
    .service-network p { margin: 0 0 18px; color: #e0eaff; font-size: 14px; }
    .service-network .plain-list { color: #f1f5ff; }
    .service-network .plain-list li::before { color: #8ce1d5; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
    .review { padding: 20px; border: 1px solid var(--line); background: #fff; }
    .review p { margin: 0 0 17px; color: #425168; font-size: 14px; }
    .review footer { display: flex; justify-content: space-between; gap: 12px; color: var(--muted); font-size: 12px; }
    .review footer strong { color: var(--ink); }
    .compare-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    .compare-table { width: 100%; min-width: 720px; border-collapse: collapse; }
    .compare-table th, .compare-table td { padding: 13px 16px; border-bottom: 1px solid #e5eaf1; text-align: left; font-size: 13px; }
    .compare-table thead th { background: #eaf2ff; color: #173d7e; }
    .compare-table tbody tr:last-child td { border-bottom: 0; }
    .compare-table td:first-child { font-weight: 700; color: var(--ink); }
    .rating { display: flex; align-items: center; gap: 20px; margin-bottom: 18px; padding: 16px 19px; background: #fff8e5; border: 1px solid #f1dfad; }
    .rating strong { color: #8b5e00; font-size: 25px; }
    .rating span { color: #6f571f; font-size: 13px; }
    .stars { color: #db9e13; letter-spacing: 0; }
    .case-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 18px; align-items: start; }
    .case-main { overflow: hidden; border: 1px solid var(--line); background: #fff; }
    .case-main img { display: block; width: 100%; height: auto; }
    .case-caption { padding: 15px 18px; }
    .case-caption h3 { margin: 0 0 4px; font-size: 16px; }
    .case-caption p { margin: 0; color: var(--muted); font-size: 13px; }
    .case-side { display: grid; gap: 14px; }
    .case-side figure { margin: 0; border: 1px solid var(--line); background: #fff; }
    .case-side img { display: block; width: 100%; height: auto; }
    .case-side figcaption { padding: 11px 14px; color: #45556c; font-size: 13px; }
    .two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: start; }
    .timeline { border-left: 2px solid #a9c2eb; padding-left: 20px; }
    .timeline-item { position: relative; padding: 0 0 19px; }
    .timeline-item:last-child { padding-bottom: 0; }
    .timeline-item::before { content: ""; position: absolute; left: -27px; top: 7px; width: 10px; height: 10px; border-radius: 50%; background: var(--blue); border: 2px solid #fff; box-shadow: 0 0 0 1px var(--blue); }
    .timeline-item h3 { margin: 0 0 4px; font-size: 15px; }
    .timeline-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .price-panel { padding: 23px; background: #eaf2ff; border-top: 3px solid var(--blue); }
    .price-panel h3 { margin: 0 0 8px; }
    .price-panel p { margin: 0 0 15px; color: #475871; font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
    .article-list a { display: flex; align-items: center; min-height: 88px; padding: 14px; border: 1px solid var(--line); background: #fff; color: #30445f; font-size: 13px; font-weight: 700; transition: border-color .2s, color .2s; }
    .article-list a:hover { border-color: var(--blue); color: var(--blue); }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { position: relative; padding: 16px 38px 16px 0; cursor: pointer; font-weight: 700; list-style: none; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; right: 4px; top: 12px; color: var(--blue); font-size: 22px; font-weight: 400; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { max-width: 850px; margin: 0; padding: 0 30px 16px 0; color: var(--muted); font-size: 14px; }
    .form-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 36px; }
    .contact-copy { padding: 23px; background: #123e91; color: #fff; }
    .contact-copy h3 { margin: 0 0 9px; font-size: 20px; }
    .contact-copy p { margin: 0 0 18px; color: #e1ebff; font-size: 14px; }
    .contact-meta { display: grid; gap: 8px; color: #fff; font-size: 14px; }
    .contact-meta a { text-decoration: underline; text-underline-offset: 3px; }
    .qr { margin-top: 18px; width: 120px; padding: 6px; background: #fff; }
    .qr img { display: block; width: 100%; height: auto; }
    .form-panel { padding: 24px; background: #fff; border: 1px solid var(--line); }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
    .field { display: grid; gap: 6px; }
    .field-wide { grid-column: 1 / -1; }
    .field label { color: #33445c; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; border: 1px solid #cbd5e2; border-radius: 4px; background: #fff; color: var(--ink); padding: 11px 12px; outline: none; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--blue); box-shadow: 0 0 0 3px rgba(22,79,195,.1); }
    .field textarea { min-height: 112px; resize: vertical; }
    .form-bottom { display: flex; flex-wrap: wrap; align-items: center; gap: 14px; margin-top: 16px; }
    .form-bottom small { color: var(--muted); font-size: 12px; }
    .join-band { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 23px 26px; background: #e4f4f2; border-left: 4px solid var(--teal); }
    .join-band h3 { margin: 0 0 4px; font-size: 18px; }
    .join-band p { margin: 0; color: #4e6270; font-size: 14px; }
    .site-footer { background: #e9eef5; color: #23344b; border-top: 1px solid #d8e0eb; }
    .footer-main { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; padding: 28px 0 20px; }
    .footer-main p { margin: 8px 0 0; color: #536176; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; justify-content: flex-end; align-content: start; gap: 8px 16px; font-size: 13px; }
    .footer-links a { color: #344b6b; }
    .footer-links a:hover { color: var(--blue); }
    .copyright { padding: 12px 0 18px; border-top: 1px solid #d5deea; color: #5d6878; font-size: 12px; }
    .floating { position: fixed; z-index: 15; right: 17px; bottom: 18px; display: grid; gap: 8px; }
    .floating a { display: grid; place-items: center; width: 46px; height: 46px; border: 1px solid #cbd7e8; border-radius: 50%; background: #fff; color: var(--blue); box-shadow: 0 4px 14px rgba(20,44,83,.12); font-size: 12px; font-weight: 800; transition: transform .2s; }
    .floating a:hover { transform: translateY(-3px); }
    .reveal { opacity: 0; transform: translateY(12px); 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: inline-grid; place-items: center; }
      .nav-actions .btn { display: none; }
      .nav-links { display: none; position: absolute; top: 72px; left: 0; right: 0; padding: 10px 20px 16px; background: #fff; border-bottom: 1px solid var(--line); box-shadow: 0 12px 20px rgba(22,39,67,.08); }
      .nav-links.is-open { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; }
      .nav-links a { padding: 11px 9px; }
      .service-grid { grid-template-columns: repeat(3, 1fr); }
      .article-list { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 700px) {
      .container { width: min(var(--container), calc(100% - 30px)); }
      .header-inner { min-height: 64px; }
      .brand img { width: 34px; height: 34px; }
      .nav-links { top: 64px; }
      .nav-links.is-open { grid-template-columns: repeat(2, 1fr); }
      .hero-inner { padding-block: 55px 34px; }
      .hero-inner::before { right: -145px; top: 24px; width: 230px; height: 230px; opacity: .65; }
      h1 { font-size: 42px; }
      .hero-copy p { font-size: 15px; }
      .hero-band { grid-template-columns: 1fr 1fr; margin-top: 37px; }
      .metric { padding: 14px; border-bottom: 1px solid #dce5f1; }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(3), .metric:nth-child(4) { border-bottom: 0; }
      .section { padding: 51px 0; }
      .section-head { display: block; margin-bottom: 22px; }
      .section-head > .text-link { display: inline-block; margin-top: 13px; }
      h2 { font-size: 26px; }
      .intro-layout, .industry-layout, .two-col, .form-layout, .case-grid { grid-template-columns: 1fr; gap: 22px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); gap: 9px; }
      .service-item { min-height: 0; padding: 15px; }
      .workflow { grid-template-columns: 1fr 1fr; row-gap: 30px; }
      .workflow article { padding-right: 14px; }
      .reviews { grid-template-columns: 1fr 1fr; }
      .industry-list { gap: 0 14px; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .join-band { align-items: flex-start; flex-direction: column; }
      .footer-main { grid-template-columns: 1fr; gap: 17px; }
      .footer-links { justify-content: flex-start; }
    }
    @media (max-width: 440px) {
      .nav-links.is-open { grid-template-columns: 1fr 1fr; }
      .hero-actions .btn { width: 100%; }
      .service-grid, .reviews, .industry-list, .article-list, .workflow { grid-template-columns: 1fr; }
      .workflow { gap: 30px; }
      .form-grid { grid-template-columns: 1fr; }
      .field-wide { grid-column: auto; }
      .rating { align-items: flex-start; flex-direction: column; gap: 3px; }
    }