:root {
      color-scheme: light;
      --ink: #292321;
      --muted: #716762;
      --red: #c9342b;
      --red-dark: #a92722;
      --coral: #f16c50;
      --rose: #fff0e9;
      --paper: #fffaf7;
      --white: #ffffff;
      --line: #eadbd4;
      --green: #28675c;
      --container: 1160px;
      --shadow: 0 12px 34px rgba(99, 43, 28, .09);
    }
    * { 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;
    }
    body::before {
      content: "";
      position: fixed;
      inset: 0;
      z-index: -1;
      pointer-events: none;
      background:
        radial-gradient(ellipse at 8% 24%, rgba(255, 222, 204, .38), transparent 34%),
        radial-gradient(ellipse at 95% 68%, rgba(255, 230, 214, .28), transparent 36%),
        linear-gradient(180deg, #fff8f5 0%, #fffdfb 45%, #fff7f2 100%);
    }
    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, 250, 247, .94);
      border-bottom: 1px solid rgba(234, 219, 212, .85);
      backdrop-filter: blur(14px);
    }
    .nav-row { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; font-weight: 800; font-size: 18px; }
    .ai-page-logo { display: block; width: 39px; max-width: 100%; height: auto; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; }
    .nav-links a { padding: 9px 11px; color: #574b46; font-size: 13px; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover { color: var(--red); }
    .nav-links .nav-cta { margin-left: 10px; padding: 10px 16px; border-radius: 4px; background: var(--red); color: #fff; font-weight: 700; }
    .nav-toggle {
      display: none; align-items: center; justify-content: center; width: 42px; height: 42px;
      border: 1px solid var(--line); border-radius: 4px; background: #fff; color: var(--ink); cursor: pointer;
    }
    .nav-toggle span, .nav-toggle span::before, .nav-toggle span::after { display: block; width: 18px; height: 2px; background: currentColor; content: ""; }
    .nav-toggle span { position: relative; }
    .nav-toggle span::before { position: absolute; top: -6px; }
    .nav-toggle span::after { position: absolute; top: 6px; }
    .hero { position: relative; overflow: hidden; padding: 78px 0 58px; border-bottom: 1px solid var(--line); }
    .hero::before {
      content: ""; position: absolute; width: 480px; height: 480px; border: 1px solid rgba(201, 52, 43, .13);
      border-radius: 50%; right: -170px; top: -240px; box-shadow: 0 0 0 36px rgba(201,52,43,.025), 0 0 0 76px rgba(201,52,43,.02);
      pointer-events: none; animation: orbit 24s linear infinite;
    }
    .hero::after {
      content: ""; position: absolute; width: 9px; height: 9px; background: var(--coral);
      right: 17%; top: 30%; transform: rotate(45deg); box-shadow: 0 0 0 9px rgba(241,108,80,.12);
    }
    .hero-inner { position: relative; z-index: 1; max-width: 860px; }
    .eyebrow { display: flex; align-items: center; gap: 10px; margin: 0 0 18px; color: var(--red); font-size: 12px; font-weight: 800; letter-spacing: 1px; }
    .eyebrow::before { width: 26px; height: 2px; background: currentColor; content: ""; }
    h1 { max-width: 790px; margin: 0; font-size: clamp(38px, 6vw, 68px); line-height: 1.12; letter-spacing: 0; font-weight: 850; }
    .hero-copy { max-width: 660px; margin: 22px 0 0; color: #655952; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; margin-top: 30px; }
    .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 9px; min-height: 48px;
      padding: 0 21px; border: 1px solid transparent; border-radius: 4px; background: var(--red);
      color: #fff; font-weight: 750; transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
    }
    .button:hover { transform: translateY(-2px); background: var(--red-dark); box-shadow: 0 9px 20px rgba(169,39,34,.2); }
    .button.secondary { background: #fff; color: var(--ink); border-color: #d9c7bf; }
    .button.secondary:hover { color: var(--red); border-color: var(--red); box-shadow: none; }
    .button .arrow { font-size: 18px; line-height: 1; }
    .hero-note { display: flex; flex-wrap: wrap; gap: 9px 20px; margin-top: 23px; color: #675a53; font-size: 13px; }
    .hero-note span::before { content: "✓"; color: var(--green); font-weight: 800; margin-right: 7px; }
    .hero-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1px; margin-top: 48px; border: 1px solid var(--line); background: var(--line); }
    .metric { padding: 17px 20px; background: rgba(255,255,255,.78); }
    .metric strong { display: block; color: var(--red); font-size: 20px; line-height: 1.2; }
    .metric span { display: block; margin-top: 5px; color: var(--muted); font-size: 12px; }
    .section { padding: 76px 0; }
    .section.tint { background: rgba(255, 239, 231, .58); border-block: 1px solid rgba(234,219,212,.8); }
    .section-head { display: flex; justify-content: space-between; align-items: end; gap: 24px; margin-bottom: 30px; }
    .section-head > div { max-width: 720px; }
    .kicker { margin: 0 0 7px; color: var(--red); font-size: 12px; font-weight: 800; }
    h2 { margin: 0; font-size: clamp(27px, 4vw, 39px); line-height: 1.22; letter-spacing: 0; }
    .section-intro { max-width: 550px; margin: 10px 0 0; color: var(--muted); font-size: 15px; }
    .text-link { display: inline-flex; align-items: center; gap: 7px; color: var(--red); font-weight: 750; white-space: nowrap; }
    .about-layout { display: grid; grid-template-columns: 1.1fr .9fr; gap: 52px; align-items: start; }
    .about-copy p { margin: 0 0 15px; color: #5f544e; }
    .about-copy strong { color: var(--ink); }
    .about-points { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 0 22px; margin: 22px 0 0; padding: 0; list-style: none; }
    .about-points li { padding: 12px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
    .about-points li::before { content: "＋"; margin-right: 9px; color: var(--red); font-weight: 800; }
    .model-panel { padding: 24px 25px; border-left: 3px solid var(--red); background: #fff; box-shadow: var(--shadow); }
    .model-panel h3 { margin: 0 0 7px; font-size: 18px; }
    .model-panel p { margin: 0; color: var(--muted); font-size: 13px; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
    .tag { padding: 6px 10px; border: 1px solid #eedbd2; border-radius: 3px; background: #fff8f4; color: #594841; font-size: 12px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; }
    .service-item { position: relative; padding: 21px; border: 1px solid var(--line); background: rgba(255,255,255,.82); transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease; }
    .service-item:hover { transform: translateY(-4px); border-color: #e5b9a8; box-shadow: var(--shadow); }
    .service-index { color: var(--coral); font-size: 11px; font-weight: 800; }
    .service-item h3 { margin: 7px 0 8px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-item .service-label { display: inline-block; margin-top: 13px; color: var(--red); font-size: 12px; font-weight: 700; }
    .workflow-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 0; counter-reset: step; }
    .workflow-step { position: relative; padding: 23px 20px 18px 0; border-top: 1px solid #d9bdb0; counter-increment: step; }
    .workflow-step::before { content: "0" counter(step); display: block; margin-bottom: 16px; color: var(--red); font-size: 14px; font-weight: 850; }
    .workflow-step h3 { margin: 0 0 7px; font-size: 16px; }
    .workflow-step p { margin: 0; color: var(--muted); font-size: 13px; }
    .solutions { display: grid; grid-template-columns: 1fr 1fr; gap: 0 40px; }
    .solution { display: grid; grid-template-columns: 115px 1fr; gap: 18px; padding: 19px 0; border-bottom: 1px solid var(--line); }
    .solution strong { color: var(--red); font-size: 14px; }
    .solution p { margin: 0; color: #625750; font-size: 13px; }
    .network-band { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 26px; padding: 27px 0; border-block: 1px solid var(--line); }
    .network-band h3 { margin: 0 0 7px; font-size: 16px; }
    .network-band p { margin: 0; color: var(--muted); font-size: 13px; }
    .showcase-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 16px; align-items: start; }
    .showcase { margin: 0; overflow: hidden; border: 1px solid var(--line); background: #fff; }
    .showcase img { display: block; width: 100%; height: auto; }
    .showcase figcaption { padding: 12px 14px; color: #51443e; font-size: 13px; }
    .reviews-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 13px; }
    .review { padding: 19px; border-top: 2px solid var(--coral); background: #fff; }
    .review blockquote { margin: 0; color: #514841; font-size: 14px; }
    .review figcaption { margin-top: 14px; color: var(--muted); font-size: 12px; }
    .review figcaption strong { display: block; color: var(--ink); font-size: 13px; }
    .rating-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 30px; align-items: start; }
    .rating-score { padding: 28px; background: var(--red); color: #fff; }
    .rating-score .score-label { margin: 0; color: #ffe1d5; font-size: 13px; }
    .rating-score strong { display: block; margin-top: 8px; font-size: 54px; line-height: 1; }
    .stars { margin-top: 10px; color: #ffe5a6; font-size: 22px; letter-spacing: 0; }
    .rating-score p:last-child { margin: 14px 0 0; color: #fff1eb; font-size: 13px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; border-collapse: collapse; min-width: 560px; text-align: left; }
    th, td { padding: 13px 15px; border-bottom: 1px solid #efe4df; font-size: 13px; vertical-align: top; }
    th { background: #fff0e9; color: #433731; font-weight: 800; }
    td:first-child { width: 24%; font-weight: 700; }
    .positive { color: var(--green); font-weight: 700; }
    .articles-grid { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: 12px; }
    .article-link { display: flex; min-height: 116px; flex-direction: column; justify-content: space-between; padding: 16px; border: 1px solid var(--line); background: rgba(255,255,255,.8); transition: border-color .2s ease, transform .2s ease; }
    .article-link:hover { transform: translateY(-3px); border-color: var(--coral); }
    .article-link span { color: #534640; font-size: 14px; font-weight: 700; }
    .article-link small { color: var(--red); font-size: 12px; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-item summary { position: relative; padding: 17px 38px 17px 0; cursor: pointer; font-weight: 750; list-style: none; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; right: 6px; top: 13px; color: var(--red); font-size: 22px; font-weight: 400; transition: transform .2s ease; }
    .faq-item[open] summary::after { transform: rotate(45deg); }
    .faq-item p { max-width: 850px; margin: -2px 0 17px; color: var(--muted); font-size: 14px; }
    .contact-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 42px; align-items: start; }
    .contact-copy h3 { margin: 0 0 9px; font-size: 21px; }
    .contact-copy > p { margin: 0; color: var(--muted); font-size: 14px; }
    .contact-list { display: grid; gap: 9px; margin-top: 22px; }
    .contact-line { padding-bottom: 9px; border-bottom: 1px solid var(--line); color: #514740; font-size: 14px; }
    .contact-line strong { display: inline-block; min-width: 96px; color: var(--ink); }
    .qr-wrap { display: flex; align-items: center; gap: 14px; margin-top: 20px; color: var(--muted); font-size: 12px; }
    .qr-wrap img { display: block; width: 112px; height: auto; border: 1px solid var(--line); background: #fff; }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 23px; border: 1px solid var(--line); background: #fff; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { color: #514740; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-height: 44px; padding: 10px 11px; border: 1px solid #dbcac2; border-radius: 3px; background: #fffdfa; color: var(--ink); outline: none; }
    .field textarea { min-height: 105px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--red); box-shadow: 0 0 0 3px rgba(201,52,43,.09); }
    .contact-form .button { justify-self: start; cursor: pointer; }
    .join-band { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 25px 0 0; }
    .join-band h3 { margin: 0; font-size: 19px; }
    .join-band p { margin: 4px 0 0; color: var(--muted); font-size: 13px; }
    .link-groups { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; padding: 25px 0; border-top: 1px solid var(--line); }
    .link-groups h3 { margin: 0 0 10px; font-size: 14px; }
    .link-list { display: flex; flex-wrap: wrap; gap: 8px 15px; }
    .link-list a { color: #65564f; font-size: 12px; }
    .link-list a:hover { color: var(--red); }
    .site-footer { padding: 18px 0 24px; border-top: 1px solid var(--line); background: #fff6f1; color: #514740; }
    .footer-row { display: flex; align-items: center; justify-content: space-between; gap: 16px; font-size: 12px; }
    .footer-row p { margin: 0; }
    .footer-row a { color: var(--red-dark); }
    .floating-contact { position: fixed; z-index: 15; right: 18px; bottom: 20px; display: grid; gap: 8px; }
    .floating-contact a { display: inline-flex; align-items: center; justify-content: center; min-height: 42px; padding: 0 14px; border: 1px solid #d9c5bb; border-radius: 4px; background: #fff; color: var(--ink); box-shadow: 0 5px 18px rgba(65,36,24,.12); font-size: 12px; font-weight: 750; transition: transform .2s ease, color .2s ease; }
    .floating-contact a:hover { transform: translateY(-2px); color: var(--red); }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .6s ease, transform .6s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @keyframes orbit { to { transform: rotate(360deg); } }
    @media (max-width: 980px) {
      .nav-links a { padding-inline: 7px; font-size: 12px; }
      .nav-links .nav-cta { margin-left: 4px; padding-inline: 11px; }
      .service-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .articles-grid { grid-template-columns: repeat(3, minmax(0,1fr)); }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .nav-row { min-height: 64px; }
      .nav-toggle { display: inline-flex; }
      .nav-links {
        display: none; position: absolute; top: 64px; left: 0; right: 0; align-items: stretch;
        padding: 9px 16px 15px; border-bottom: 1px solid var(--line); background: var(--paper);
        box-shadow: 0 12px 18px rgba(70,35,22,.08);
      }
      .nav-links.open { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); }
      .nav-links a { padding: 10px 8px; font-size: 14px; }
      .nav-links .nav-cta { margin: 4px 0 0; text-align: center; }
      .hero { padding: 60px 0 42px; }
      h1 { font-size: 44px; }
      .hero-copy { font-size: 15px; }
      .hero-strip { grid-template-columns: repeat(2, 1fr); margin-top: 34px; }
      .section { padding: 58px 0; }
      .section-head { display: block; }
      .section-head > .text-link { margin-top: 14px; }
      .about-layout, .rating-layout, .contact-layout { grid-template-columns: 1fr; gap: 25px; }
      .workflow-grid { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 16px 22px; }
      .solutions { grid-template-columns: 1fr; }
      .network-band { grid-template-columns: 1fr; gap: 17px; }
      .showcase-grid { grid-template-columns: 1fr 1fr; }
      .showcase:first-child { grid-column: 1 / -1; }
      .reviews-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .articles-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .join-band { align-items: flex-start; flex-direction: column; }
    }
    @media (max-width: 480px) {
      .brand { font-size: 16px; }
      .ai-page-logo { width: 34px; }
      h1 { font-size: 39px; }
      .hero-actions { align-items: stretch; flex-direction: column; max-width: 320px; }
      .hero-actions .button { width: 100%; }
      .hero-note { display: grid; gap: 7px; }
      .service-grid, .reviews-grid, .articles-grid { grid-template-columns: 1fr; }
      .about-points { grid-template-columns: 1fr; }
      .solution { grid-template-columns: 96px 1fr; gap: 11px; }
      .showcase-grid { grid-template-columns: 1fr; }
      .showcase:first-child { grid-column: auto; }
      .contact-form { grid-template-columns: 1fr; padding: 17px; }
      .field.full { grid-column: auto; }
      .link-groups { grid-template-columns: 1fr; gap: 18px; }
      .footer-row { align-items: flex-start; flex-direction: column; }
      .floating-contact { right: 10px; bottom: 12px; }
      .floating-contact a { min-height: 38px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }