:root {
      color-scheme: light;
      --ink: #282521;
      --muted: #6e6862;
      --paper: #fffaf5;
      --white: #fff;
      --line: #eadfd4;
      --orange: #ec5b24;
      --orange-dark: #b83b12;
      --coral: #ff9a62;
      --green: #28685b;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 92px; }
    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; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky;
      z-index: 20;
      top: 0;
      background: rgba(255,250,245,.95);
      border-bottom: 1px solid rgba(234,223,212,.9);
      backdrop-filter: blur(12px);
    }
    .nav-wrap { display: flex; align-items: center; justify-content: space-between; gap: 18px; min-height: 72px; }
    .brand { display: inline-flex; align-items: center; gap: 10px; flex: 0 0 auto; font-weight: 800; }
    .ai-page-logo { width: 38px; max-width: 100%; height: auto; }
    .brand-name { font-size: 18px; letter-spacing: 0; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; }
    .nav-links a { padding: 10px 12px; color: #514a44; font-size: 13px; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover { color: var(--orange-dark); }
    .nav-cta, .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      border: 0; border-radius: 4px; background: var(--orange); color: #fff;
      padding: 12px 18px; font-weight: 700; cursor: pointer;
      box-shadow: 0 7px 18px rgba(236,91,36,.19);
      transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    }
    .nav-cta { flex: 0 0 auto; padding: 10px 15px; font-size: 13px; }
    .button:hover, .nav-cta:hover { background: var(--orange-dark); transform: translateY(-2px); box-shadow: 0 10px 22px rgba(184,59,18,.22); }
    .button.secondary { background: transparent; color: var(--ink); border: 1px solid #cfc1b4; box-shadow: none; }
    .button.secondary:hover { border-color: var(--orange); color: var(--orange-dark); background: #fff3e9; }
    .menu-toggle { display: none; border: 1px solid var(--line); color: var(--ink); background: #fff; border-radius: 4px; padding: 8px 11px; cursor: pointer; }
    .hero {
      position: relative;
      overflow: hidden;
      padding: 78px 0 52px;
      background: linear-gradient(125deg, #fff3e9 0%, #fffaf5 55%, #f8e7d8 100%);
      border-bottom: 1px solid #f1dfd0;
    }
    .hero:before {
      content: ""; position: absolute; width: 390px; height: 390px; right: -160px; top: -170px;
      border: 1px solid rgba(236,91,36,.2); border-radius: 50%;
      box-shadow: 0 0 0 34px rgba(236,91,36,.035), 0 0 0 68px rgba(236,91,36,.025);
      pointer-events: none;
    }
    .hero-grid { display: grid; grid-template-columns: 1.35fr .65fr; gap: 48px; align-items: center; position: relative; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--orange-dark); font-size: 13px; font-weight: 800; }
    .eyebrow:before { content: ""; width: 24px; height: 2px; background: var(--orange); }
    h1 { max-width: 700px; margin: 18px 0 16px; font-size: clamp(38px, 6vw, 68px); line-height: 1.09; letter-spacing: 0; }
    .hero-copy { max-width: 650px; color: #5c554f; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 25px; }
    .hero-note { margin-top: 16px; color: var(--muted); font-size: 13px; }
    .hero-visual { position: relative; padding: 24px 0 24px 24px; border-left: 1px solid #e5c9b5; }
    .hero-visual:before { content: ""; position: absolute; left: -4px; top: 28px; width: 7px; height: 7px; border-radius: 50%; background: var(--orange); }
    .hero-visual h2 { margin: 0 0 16px; font-size: 17px; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-cloud span { padding: 7px 10px; border: 1px solid #e8d5c6; background: rgba(255,255,255,.74); color: #514a44; font-size: 12px; }
    .hero-statline { display: flex; gap: 20px; margin-top: 25px; padding-top: 18px; border-top: 1px solid #e5c9b5; }
    .hero-statline strong { display: block; font-size: 17px; }
    .hero-statline small { color: var(--muted); font-size: 12px; }
    .trust-strip { padding: 18px 0; background: #fff; border-bottom: 1px solid var(--line); }
    .trust-inner { display: flex; align-items: center; justify-content: space-between; gap: 18px; }
    .trust-label { color: var(--muted); font-size: 13px; }
    .trust-items { display: flex; flex-wrap: wrap; gap: 8px 20px; color: #49423c; font-size: 13px; font-weight: 650; }
    .trust-items span:before { content: "✓"; color: var(--green); margin-right: 7px; font-weight: 800; }
    section.content-section { padding: 76px 0; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .section-kicker { color: var(--orange-dark); text-transform: uppercase; font-size: 12px; font-weight: 800; letter-spacing: 1px; }
    h2.section-title { margin: 5px 0 0; font-size: 34px; line-height: 1.2; letter-spacing: 0; }
    .section-desc { max-width: 580px; margin: 8px 0 0; color: var(--muted); }
    .about-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 46px; align-items: start; }
    .about-copy p { color: #5f5852; margin: 0 0 15px; }
    .about-aside { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 0 24px; border-top: 1px solid var(--line); }
    .about-point { padding: 17px 0; border-bottom: 1px solid var(--line); }
    .about-point strong { display: block; margin-bottom: 4px; }
    .about-point span { color: var(--muted); font-size: 13px; }
    .service-band { background: #f4eee8; border-block: 1px solid #e9ded4; }
    .service-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 1px; background: #dfd3c8; border: 1px solid #dfd3c8; }
    .service-item { min-width: 0; padding: 22px 20px; background: #fffaf5; transition: background .2s ease, transform .2s ease; }
    .service-item:hover { position: relative; z-index: 1; background: #fff; transform: translateY(-3px); }
    .service-index { color: var(--orange); font-size: 12px; font-weight: 800; }
    .service-item h3 { margin: 7px 0; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .workflow { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 0; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .step { padding: 22px 22px 24px 0; position: relative; }
    .step:not(:last-child):after { content: "→"; position: absolute; right: 17px; top: 22px; color: var(--orange); font-size: 20px; }
    .step-number { color: var(--orange-dark); font-size: 12px; font-weight: 800; }
    .step h3 { margin: 8px 0 5px; font-size: 17px; }
    .step p { margin: 0; max-width: 240px; color: var(--muted); font-size: 13px; }
    .solution-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 54px; align-items: center; }
    .solution-layout h2 { margin: 0 0 14px; font-size: 30px; line-height: 1.25; }
    .solution-layout p { color: var(--muted); }
    .industry-list { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); gap: 0 25px; margin-top: 18px; }
    .industry-list span { border-bottom: 1px solid var(--line); padding: 10px 0; font-size: 14px; }
    .industry-list span:before { content: "＋"; color: var(--orange); margin-right: 8px; }
    .asset-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .asset-frame { overflow: hidden; background: #f1e6dc; border: 1px solid #e8d8c9; }
    .asset-frame img { display: block; width: 100%; height: auto; }
    .asset-caption { padding: 10px 13px; color: #504941; font-size: 13px; background: #fff; }
    .review-section { background: #fff; border-block: 1px solid var(--line); }
    .review-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 0 25px; }
    .review { padding: 20px 0 22px; border-top: 2px solid #e8d7c8; }
    .review blockquote { margin: 0; color: #49433e; font-size: 14px; }
    .review footer { margin-top: 13px; color: var(--muted); font-size: 12px; }
    .review footer strong { color: var(--ink); font-size: 13px; }
    .review-note { margin: 22px 0 0; color: var(--muted); font-size: 12px; }
    .case-grid { display: grid; grid-template-columns: repeat(3,minmax(0,1fr)); gap: 24px; }
    .case { border-top: 3px solid var(--orange); padding: 18px 0 0; }
    .case h3 { margin: 0 0 8px; font-size: 18px; }
    .case p { margin: 0 0 12px; color: var(--muted); font-size: 14px; }
    .case a, .text-link { color: var(--orange-dark); font-size: 13px; font-weight: 700; }
    .compare-section { color: #fff8f2; background: #302c28; }
    .compare-section .section-kicker { color: #ffad7e; }
    .compare-section .section-title { color: #fff8f2; }
    .compare-section .section-desc { color: #d5c9c0; }
    .rating { display: flex; align-items: center; gap: 13px; padding: 18px 20px; border: 1px solid #66574d; margin-bottom: 22px; }
    .rating-score { font-size: 38px; line-height: 1; font-weight: 800; color: #ff9a62; }
    .rating-stars { color: #ffb277; letter-spacing: 2px; }
    .rating small { display: block; color: #e0d3c9; font-size: 12px; }
    .table-wrap { overflow-x: auto; border: 1px solid #5a504a; }
    .comparison { width: 100%; min-width: 720px; border-collapse: collapse; text-align: left; }
    .comparison th, .comparison td { padding: 13px 16px; border-bottom: 1px solid #514842; vertical-align: top; }
    .comparison th { color: #ffbd96; font-size: 13px; background: #39332f; }
    .comparison td { color: #f0e8e2; font-size: 13px; }
    .comparison tr:last-child td { border-bottom: 0; }
    .match-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; align-items: start; }
    .match-copy { position: sticky; top: 105px; }
    .match-copy h2 { margin: 0 0 12px; font-size: 30px; }
    .match-copy p { color: var(--muted); }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
    .tag-cloud span { padding: 6px 10px; border: 1px solid #e4d4c6; color: #514a44; font-size: 12px; }
    .form-panel { padding: 24px; background: #fff; border: 1px solid var(--line); }
    .form-grid { 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 { color: #47413b; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; border: 1px solid #d9cec4; border-radius: 3px; padding: 11px 12px; background: #fffdfa; color: var(--ink); outline: none; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--orange); box-shadow: 0 0 0 3px rgba(236,91,36,.1); }
    .field textarea { min-height: 112px; resize: vertical; }
    .form-foot { display: flex; align-items: center; justify-content: space-between; gap: 15px; margin-top: 16px; }
    .form-foot small { color: var(--muted); }
    .faq-list { border-top: 1px solid var(--line); }
    details.faq { border-bottom: 1px solid var(--line); }
    details.faq summary { position: relative; list-style: none; cursor: pointer; padding: 17px 35px 17px 0; font-weight: 700; }
    details.faq summary::-webkit-details-marker { display: none; }
    details.faq summary:after { content: "+"; position: absolute; right: 4px; top: 15px; color: var(--orange-dark); font-size: 22px; font-weight: 400; }
    details.faq[open] summary:after { content: "−"; }
    .faq p { margin: 0; padding: 0 35px 17px 0; color: var(--muted); font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(5,minmax(0,1fr)); gap: 0 18px; border-top: 1px solid var(--line); }
    .article-list a { padding: 15px 0; border-bottom: 1px solid var(--line); color: #3e3934; font-size: 13px; }
    .article-list a:hover { color: var(--orange-dark); }
    .join-band { padding: 28px 0; background: #f2e8df; border-block: 1px solid #e5d6ca; }
    .join-inner { display: flex; align-items: center; justify-content: space-between; gap: 25px; }
    .join-inner h2 { margin: 0 0 4px; font-size: 22px; }
    .join-inner p { margin: 0; color: var(--muted); font-size: 14px; }
    .contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 42px; align-items: start; }
    .contact-details { display: grid; grid-template-columns: 1fr 1fr; gap: 15px 24px; }
    .contact-line { padding: 12px 0; border-bottom: 1px solid var(--line); }
    .contact-line small { display: block; color: var(--muted); font-size: 12px; }
    .contact-line strong { font-size: 14px; }
    .qr-wrap { display: flex; align-items: center; gap: 17px; margin-top: 20px; }
    .qr-wrap img { width: 112px; height: auto; border: 1px solid var(--line); background: #fff; }
    .qr-wrap p { color: var(--muted); font-size: 13px; }
    .site-footer { background: #f3e8de; color: #332d28; border-top: 1px solid #e3d4c8; }
    .footer-main { display: flex; align-items: flex-start; justify-content: space-between; gap: 32px; padding: 28px 0 20px; }
    .footer-brand { max-width: 360px; }
    .footer-brand p { margin: 9px 0 0; color: #635b54; font-size: 13px; }
    .friend-links { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 8px 18px; max-width: 600px; }
    .friend-links a { color: #4c443d; font-size: 12px; }
    .friend-links a:hover { color: var(--orange-dark); }
    .footer-bottom { padding: 13px 0 18px; border-top: 1px solid #dfd0c4; color: #625951; font-size: 12px; }
    .floating-help { position: fixed; z-index: 15; right: 18px; bottom: 20px; display: flex; align-items: center; gap: 9px; }
    .floating-help a { display: inline-flex; align-items: center; justify-content: center; min-height: 43px; padding: 0 13px; color: #fff; background: #28685b; box-shadow: 0 5px 18px rgba(40,104,91,.22); font-size: 13px; font-weight: 700; }
    .to-top { width: 43px; height: 43px; padding: 0 !important; border: 0; cursor: pointer; font-size: 19px !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: 950px) {
      .nav-links a { padding-inline: 8px; font-size: 12px; }
      .hero-grid { gap: 28px; }
      .service-grid { grid-template-columns: repeat(2,minmax(0,1fr)); }
      .article-list { grid-template-columns: repeat(3,minmax(0,1fr)); }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .nav-wrap { min-height: 64px; }
      .menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
      .nav-cta { margin-left: auto; }
      .nav-links { display: none; position: absolute; top: 63px; left: 0; right: 0; padding: 9px 16px 15px; background: var(--paper); border-bottom: 1px solid var(--line); box-shadow: 0 12px 16px rgba(50,40,30,.08); }
      .nav-links.is-open { display: grid; grid-template-columns: repeat(2,minmax(0,1fr)); }
      .nav-links a { padding: 11px 9px; border-bottom: 1px solid #eee3d9; font-size: 14px; }
      .hero { padding: 56px 0 38px; }
      .hero-grid, .about-grid, .solution-layout, .match-grid, .contact-grid { grid-template-columns: 1fr; }
      .hero-grid { gap: 30px; }
      h1 { font-size: 45px; }
      .hero-visual { padding: 17px 0 0; border-left: 0; border-top: 1px solid #e5c9b5; }
      .hero-visual:before { left: 0; top: -4px; }
      .trust-inner { align-items: flex-start; flex-direction: column; }
      section.content-section { padding: 56px 0; }
      .section-head { display: block; margin-bottom: 23px; }
      h2.section-title { font-size: 29px; }
      .workflow { grid-template-columns: repeat(2,minmax(0,1fr)); }
      .step { padding: 19px 18px 20px 0; }
      .step:nth-child(2):after { content: ""; }
      .review-grid { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 0 18px; }
      .case-grid { grid-template-columns: 1fr; gap: 20px; }
      .match-copy { position: static; }
      .footer-main { display: block; }
      .friend-links { justify-content: flex-start; margin-top: 20px; }
      .join-inner { align-items: flex-start; flex-direction: column; }
    }
    @media (max-width: 480px) {
      .nav-cta { padding: 9px 11px; font-size: 12px; }
      .brand-name { font-size: 16px; }
      .ai-page-logo { width: 32px; }
      h1 { font-size: 39px; }
      .hero-copy { font-size: 15px; }
      .hero-statline { gap: 12px; }
      .service-grid { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr; }
      .step:not(:last-child):after { content: ""; }
      .about-aside, .industry-list, .asset-row, .review-grid, .form-grid, .contact-details { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .form-panel { padding: 18px; }
      .form-foot { align-items: flex-start; flex-direction: column; }
      .article-list { grid-template-columns: repeat(2,minmax(0,1fr)); gap: 0 14px; }
      .floating-help { right: 10px; bottom: 10px; }
      .floating-help a { min-height: 40px; padding: 0 10px; font-size: 12px; }
      .to-top { width: 40px; height: 40px; }
    }