:root {
      color-scheme: light;
      --ink: #182433;
      --muted: #596879;
      --line: #dce3eb;
      --paper: #f6f8fb;
      --white: #fff;
      --teal: #087f8c;
      --blue: #3158b8;
      --coral: #d96748;
      --lime: #b4d947;
      --shadow: 0 14px 36px rgba(26, 48, 72, .08);
      --max: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
      line-height: 1.65;
    }
    a { color: inherit; }
    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(255,255,255,.94); 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: 20px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { display: block; width: 38px; height: auto; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 8px 9px; font-size: 13px; text-decoration: none; color: #344457; }
    .nav-links a:hover { color: var(--teal); }
    .nav-cta, .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      border: 1px solid transparent; border-radius: 5px; padding: 11px 16px;
      background: var(--teal); color: #fff; font-weight: 700; text-decoration: none;
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .nav-cta:hover, .button:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(8,127,140,.2); background: #066a75; }
    .button.secondary { color: var(--ink); background: #fff; border-color: #bac6d3; }
    .button.secondary:hover { background: #f3f7f9; }
    .menu-toggle { display: none; border: 1px solid var(--line); border-radius: 5px; background: #fff; color: var(--ink); padding: 8px 11px; }
    .hero {
      position: relative; overflow: hidden; isolation: isolate;
      background: #eaf2f2;
      border-bottom: 1px solid #d5e3e5;
    }
    .hero::before {
      content: ""; position: absolute; z-index: -1; inset: 0;
      background:
        linear-gradient(115deg, rgba(8,127,140,.09), transparent 42%),
        repeating-linear-gradient(135deg, transparent 0 42px, rgba(49,88,184,.055) 43px 44px);
      animation: drift 18s linear infinite;
    }
    .hero-inner { display: grid; grid-template-columns: minmax(0,1.12fr) minmax(270px,.88fr); gap: 52px; align-items: center; padding-block: 76px 64px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--teal); font-size: 13px; font-weight: 800; letter-spacing: .08em; }
    .eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--coral); }
    h1 { max-width: 670px; margin: 16px 0 18px; font-size: clamp(38px, 5.4vw, 62px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 610px; color: #435365; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
    .hero-proof { display: flex; flex-wrap: wrap; gap: 18px 25px; margin-top: 28px; color: #405365; font-size: 13px; }
    .hero-proof span::before { content: "✓"; margin-right: 7px; color: var(--teal); font-weight: 900; }
    .data-panel { border: 1px solid rgba(36,83,102,.18); background: rgba(255,255,255,.78); padding: 24px; box-shadow: var(--shadow); }
    .data-panel h2 { margin: 0 0 5px; font-size: 18px; }
    .data-panel > p { margin: 0 0 20px; color: var(--muted); font-size: 13px; }
    .metric-grid { display: grid; grid-template-columns: 1fr 1fr; border-top: 1px solid var(--line); border-left: 1px solid var(--line); }
    .metric { padding: 15px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .metric strong { display: block; font-size: 25px; line-height: 1.15; }
    .metric span { display: block; margin-top: 6px; color: var(--muted); font-size: 12px; }
    .metric .accent { color: var(--teal); }
    .section { padding-block: 72px; }
    .section.alt { background: #edf2f5; border-block: 1px solid #dfe6ec; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .section-head h2 { margin: 7px 0 0; font-size: clamp(27px, 3vw, 38px); line-height: 1.2; letter-spacing: 0; }
    .section-head p { max-width: 550px; margin: 0; color: var(--muted); }
    .kicker { color: var(--coral); font-size: 12px; font-weight: 800; letter-spacing: .1em; text-transform: uppercase; }
    .intro-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: start; }
    .intro-copy { max-width: 700px; color: #435365; }
    .intro-copy p { margin: 0 0 15px; }
    .capability-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 20px; margin: 0; padding: 0; list-style: none; }
    .capability-list li { border-top: 1px solid var(--line); padding: 13px 0; font-weight: 700; }
    .capability-list small { display: block; color: var(--muted); font-weight: 400; }
    .service-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
    .service-item { min-height: 148px; padding: 20px; background: #fff; transition: background .2s ease, transform .2s ease; }
    .service-item:hover { position: relative; z-index: 1; transform: translateY(-3px); background: #f7fcfc; }
    .service-item h3 { margin: 0 0 8px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-item .num { display: block; margin-bottom: 12px; color: var(--teal); font-size: 12px; font-weight: 800; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 24px; }
    .tag-cloud span { padding: 6px 10px; border: 1px solid #cbd6df; color: #35495d; background: #fff; font-size: 12px; }
    .workflow { display: grid; grid-template-columns: repeat(5, 1fr); gap: 0; counter-reset: step; }
    .step { position: relative; padding: 14px 20px 16px 0; border-top: 2px solid #9eb5bd; counter-increment: step; }
    .step::before { content: "0" counter(step); display: block; margin: -28px 0 14px; width: 40px; padding: 3px 0; background: var(--paper); color: var(--teal); font-weight: 900; }
    .step h3 { margin: 0 0 7px; font-size: 16px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }
    .solution-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .solution { border-top: 3px solid var(--teal); padding: 20px 0; }
    .solution:nth-child(2) { border-color: var(--coral); }
    .solution:nth-child(3) { border-color: var(--blue); }
    .solution h3 { margin: 0 0 8px; font-size: 19px; }
    .solution p { margin: 0; color: var(--muted); }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
    .review { border: 1px solid var(--line); background: #fff; padding: 20px; }
    .review blockquote { margin: 0; color: #3d4d5e; }
    .review p { margin: 12px 0 0; font-weight: 700; font-size: 13px; }
    .review span { color: var(--muted); font-weight: 400; }
    .case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
    .case { display: grid; grid-template-columns: .9fr 1.1fr; align-items: center; gap: 20px; border-bottom: 1px solid var(--line); padding-bottom: 20px; }
    .media-frame { background: #e4eaed; aspect-ratio: 4 / 3; overflow: hidden; }
    .media-frame img { display: block; width: 100%; height: 100%; object-fit: cover; }
    .case h3 { margin: 0 0 7px; }
    .case p { margin: 0; color: var(--muted); font-size: 14px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; min-width: 720px; border-collapse: collapse; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { background: #e8eff1; color: #263b4c; font-size: 13px; }
    td { font-size: 14px; }
    tr:last-child td { border-bottom: 0; }
    .score { display: flex; align-items: center; gap: 17px; margin-bottom: 22px; }
    .score strong { color: var(--teal); font-size: 42px; line-height: 1; }
    .stars { color: #cc7c16; letter-spacing: 0; font-size: 19px; }
    .score small { color: var(--muted); }
    .fit-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: start; }
    .fit-points { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
    .fit-point { border-left: 2px solid var(--coral); padding: 2px 0 2px 13px; }
    .fit-point strong { display: block; }
    .fit-point span { color: var(--muted); font-size: 13px; }
    .price-band { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 20px; padding: 24px; background: #e4eff0; border-left: 4px solid var(--teal); }
    .price-band h3 { margin: 0 0 5px; }
    .price-band p { margin: 0; color: var(--muted); }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { cursor: pointer; padding: 16px 28px 16px 0; position: relative; list-style: none; font-weight: 700; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 3px; top: 12px; color: var(--teal); font-size: 22px; font-weight: 400; }
    details[open] summary::after { content: "−"; }
    details p { max-width: 850px; margin: 0; padding: 0 20px 17px 0; color: var(--muted); }
    .article-links { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
    .article-links a { padding: 12px; border: 1px solid var(--line); background: #fff; text-decoration: none; font-size: 13px; }
    .article-links a:hover { border-color: var(--teal); color: var(--teal); }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 42px; align-items: start; }
    .contact-info p { color: var(--muted); }
    .contact-info a { color: var(--teal); }
    .qr { width: 150px; margin-top: 18px; border: 1px solid var(--line); padding: 7px; background: #fff; }
    .qr img { display: block; width: 100%; }
    .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: 700; }
    .field input, .field select, .field textarea { width: 100%; border: 1px solid #c8d2dc; border-radius: 3px; background: #fff; color: var(--ink); padding: 11px 12px; }
    .field textarea { min-height: 112px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid rgba(8,127,140,.22); border-color: var(--teal); }
    .form-note { grid-column: 1 / -1; margin: 0; color: var(--muted); font-size: 12px; }
    .form-grid .button { justify-self: start; cursor: pointer; }
    .site-footer { background: #e8edf1; color: #243345; border-top: 1px solid #d1dbe3; }
    .footer-top { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; padding-block: 28px; }
    .footer-top p { margin: 8px 0 0; color: #4e5e6e; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; align-content: start; }
    .footer-links a { color: #354b5c; font-size: 13px; }
    .footer-bottom { border-top: 1px solid #ccd6de; padding-block: 13px; color: #506071; font-size: 12px; }
    .float-contact { position: fixed; z-index: 15; right: 18px; bottom: 18px; box-shadow: var(--shadow); }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @keyframes drift { to { background-position: 240px 0, 240px 0; } }
    @media (max-width: 1000px) {
      .nav-links { gap: 0; }
      .nav-links a { padding-inline: 6px; font-size: 12px; }
      .nav-cta { padding: 9px 11px; font-size: 13px; }
      .service-grid { grid-template-columns: repeat(3, 1fr); }
      .article-links { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--max), calc(100% - 32px)); }
      .nav-row { min-height: 64px; }
      .menu-toggle { display: inline-flex; align-items: center; gap: 7px; }
      .nav-cta { margin-left: auto; }
      .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; padding: 10px 16px 16px; background: #fff; border-bottom: 1px solid var(--line); box-shadow: var(--shadow); justify-content: flex-start; }
      .nav-links.open { display: grid; grid-template-columns: repeat(3, 1fr); }
      .nav-links a { padding: 9px 7px; font-size: 13px; }
      .hero-inner { grid-template-columns: 1fr; gap: 30px; padding-block: 53px 44px; }
      .hero-copy { font-size: 16px; }
      .section { padding-block: 54px; }
      .section-head { display: block; }
      .section-head p { margin-top: 12px; }
      .intro-grid, .fit-grid, .contact-grid { grid-template-columns: 1fr; gap: 28px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .workflow { grid-template-columns: 1fr; gap: 18px; padding-left: 6px; }
      .step { margin-left: 15px; padding: 0 0 3px 22px; border-top: 0; border-left: 2px solid #9eb5bd; }
      .step::before { position: absolute; left: -17px; top: 0; margin: 0; padding: 0; background: var(--paper); }
      .solution-grid { grid-template-columns: 1fr; gap: 8px; }
      .review-grid { grid-template-columns: 1fr 1fr; }
      .case-grid { grid-template-columns: 1fr; }
      .article-links { grid-template-columns: repeat(2, 1fr); }
      .footer-top { grid-template-columns: 1fr; gap: 18px; }
    }
    @media (max-width: 480px) {
      .brand { gap: 7px; font-size: 14px; }
      .ai-page-logo { width: 31px; }
      .nav-cta { padding: 8px 9px; font-size: 12px; }
      h1 { font-size: 38px; }
      .hero-actions .button { flex: 1 1 145px; }
      .metric { padding: 12px; }
      .metric strong { font-size: 22px; }
      .service-grid { grid-template-columns: 1fr 1fr; }
      .service-item { min-height: 155px; padding: 15px; }
      .review-grid, .fit-points { grid-template-columns: 1fr; }
      .case { grid-template-columns: 1fr; }
      .price-band { grid-template-columns: 1fr; }
      .price-band .button { justify-self: start; }
      .form-grid { grid-template-columns: 1fr; }
      .field.full, .form-note { grid-column: auto; }
      .float-contact { right: 12px; bottom: 12px; padding: 9px 12px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }