:root {
      color-scheme: light;
      --ink: #211b31;
      --muted: #6e687a;
      --purple: #6d35cf;
      --purple-dark: #4b218f;
      --violet-soft: #f0eaff;
      --line: #e8e2f0;
      --paper: #ffffff;
      --canvas: #f8f7fc;
      --pink: #f3d9ef;
      --green: #287d68;
      --container: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 84px; }
    body {
      margin: 0;
      color: var(--ink);
      background:
        radial-gradient(ellipse at 88% 8%, rgba(228, 208, 255, .42), transparent 34rem),
        linear-gradient(180deg, #fbfaff 0%, #f8f7fc 55%, #fbf9fd 100%);
      font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, 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; }
    .site-header {
      position: sticky;
      z-index: 20;
      top: 0;
      border-bottom: 1px solid rgba(229, 222, 239, .8);
      background: rgba(251, 250, 255, .93);
      backdrop-filter: blur(14px);
    }
    .header-row { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; flex: 0 0 auto; font-weight: 800; }
    .ai-page-logo { display: block; width: 39px; max-height: 39px; object-fit: contain; }
    .brand-name { font-size: 17px; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; }
    .nav-links a { color: #514a60; padding: 10px 12px; font-size: 13px; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover { color: var(--purple); }
    .nav-cta, .button {
      border: 0;
      border-radius: 7px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-weight: 700;
      transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
      cursor: pointer;
    }
    .nav-cta { padding: 10px 16px; background: var(--purple); color: #fff; white-space: nowrap; font-size: 13px; }
    .button { min-height: 48px; padding: 0 21px; }
    .button:hover, .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 9px 22px rgba(87, 40, 161, .2); }
    .button-primary { background: var(--purple); color: #fff; }
    .button-secondary { background: #fff; color: var(--purple-dark); border: 1px solid #d9caef; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 7px; color: var(--ink); background: #fff; cursor: pointer; }
    .hero { overflow: hidden; position: relative; padding: 72px 0 44px; }
    .hero::before, .hero::after { content: ""; position: absolute; pointer-events: none; border: 1px solid rgba(122, 74, 192, .13); border-radius: 50%; }
    .hero::before { width: 460px; height: 460px; right: -190px; top: -215px; box-shadow: 0 0 0 30px rgba(122,74,192,.025), 0 0 0 68px rgba(122,74,192,.02); }
    .hero::after { width: 270px; height: 270px; right: 4%; top: -120px; }
    .hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(290px, .7fr); gap: 54px; align-items: center; }
    .eyebrow { margin: 0 0 16px; color: var(--purple); font-weight: 800; font-size: 12px; letter-spacing: 0; text-transform: uppercase; }
    h1, h2, h3, p { margin-top: 0; }
    h1 { max-width: 680px; margin-bottom: 20px; font-size: clamp(39px, 5vw, 60px); line-height: 1.14; letter-spacing: 0; }
    h1 span { color: var(--purple); }
    .hero-copy { max-width: 620px; color: var(--muted); font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
    .hero-note { margin: 18px 0 0; color: #817a8d; font-size: 12px; }
    .hero-panel { padding: 25px; border: 1px solid #e4d9f2; border-radius: 12px; background: rgba(255,255,255,.82); box-shadow: 0 18px 48px rgba(61,36,96,.08); }
    .panel-heading { display: flex; justify-content: space-between; align-items: center; gap: 14px; padding-bottom: 17px; border-bottom: 1px solid var(--line); }
    .panel-heading strong { font-size: 15px; }
    .live-mark { color: var(--green); font-size: 11px; font-weight: 700; }
    .model-stack { display: grid; grid-template-columns: 1fr 1fr; gap: 9px; padding-top: 17px; }
    .model-chip { padding: 10px 11px; border-radius: 6px; background: #f5f1fb; color: #49376a; font-size: 12px; }
    .panel-foot { margin: 17px 0 0; color: var(--muted); font-size: 12px; }
    .metrics { padding: 18px 0 44px; }
    .metric-row { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .metric { padding: 21px 18px; border-right: 1px solid var(--line); }
    .metric:last-child { border-right: 0; }
    .metric strong { display: block; color: var(--purple-dark); font-size: 19px; }
    .metric span { color: var(--muted); font-size: 12px; }
    .section { padding: 76px 0; }
    .section-tint { background: linear-gradient(180deg, rgba(242,236,251,.72), rgba(250,248,253,.68)); border-block: 1px solid rgba(231,224,241,.8); }
    .section-head { max-width: 700px; margin-bottom: 32px; }
    .section-head h2 { margin-bottom: 10px; font-size: clamp(28px, 3.5vw, 38px); line-height: 1.2; letter-spacing: 0; }
    .section-head p { margin-bottom: 0; color: var(--muted); }
    .intro-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 48px; align-items: start; }
    .intro-layout h3 { margin: 0 0 12px; font-size: 21px; }
    .intro-layout p { color: var(--muted); }
    .check-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 18px; margin: 0; padding: 0; list-style: none; }
    .check-list li { padding-left: 24px; position: relative; color: #4e475a; font-size: 14px; }
    .check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--purple); font-weight: 800; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
    .service-item { min-height: 151px; padding: 20px; border: 1px solid var(--line); border-radius: 8px; background: rgba(255,255,255,.86); transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease; }
    .service-item:hover { transform: translateY(-4px); border-color: #c9b4e5; box-shadow: 0 13px 28px rgba(58,37,89,.08); }
    .service-item h3 { margin: 0 0 7px; font-size: 16px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-tag { display: inline-block; margin-bottom: 10px; color: var(--purple); font-size: 11px; font-weight: 800; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; }
    .workflow-item { padding: 0 23px 0 0; position: relative; }
    .workflow-item::before { counter-increment: step; content: "0" counter(step); display: block; margin-bottom: 16px; color: var(--purple); font-size: 13px; font-weight: 800; }
    .workflow-item:not(:last-child)::after { content: ""; position: absolute; top: 7px; left: 40px; right: 22px; height: 1px; background: #d8c8eb; }
    .workflow-item h3 { margin-bottom: 7px; font-size: 16px; }
    .workflow-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .scenario-band { padding: 24px; border-left: 3px solid var(--purple); background: #f2ecfa; color: #4c435b; }
    .scenario-band strong { color: var(--purple-dark); }
    .image-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    .image-frame { overflow: hidden; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
    .image-frame img { display: block; width: 100%; height: auto; }
    .image-caption { padding: 13px 16px; color: var(--muted); font-size: 13px; }
    .case-side { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 16px; }
    .case-side .image-frame img { aspect-ratio: 1 / 1; object-fit: cover; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
    table { width: 100%; min-width: 760px; border-collapse: collapse; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid #eeeaf3; vertical-align: top; }
    th { background: #f3eef9; color: #43345a; font-size: 13px; }
    td { color: #595264; font-size: 13px; }
    tbody tr:last-child td { border-bottom: 0; }
    .rating { display: flex; align-items: center; gap: 19px; margin-bottom: 22px; padding: 19px 22px; border: 1px solid #dfd1f0; border-radius: 8px; background: #fff; }
    .rating strong { color: var(--purple-dark); font-size: 32px; line-height: 1; }
    .stars { color: #9a67d8; letter-spacing: 0; font-size: 20px; }
    .rating small { display: block; color: var(--muted); }
    .testimonial-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .quote { padding: 20px; border-top: 2px solid #b89ae0; background: rgba(255,255,255,.75); }
    .quote p { margin-bottom: 14px; color: #514a5d; font-size: 14px; }
    .quote strong { font-size: 13px; }
    .quote span { display: block; color: var(--muted); font-size: 11px; }
    .article-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .article-link { min-height: 105px; padding: 16px; border: 1px solid var(--line); border-radius: 7px; background: #fff; display: flex; flex-direction: column; justify-content: space-between; transition: border-color .2s ease, transform .2s ease; }
    .article-link:hover { transform: translateY(-3px); border-color: #c7afe5; }
    .article-link strong { font-size: 14px; }
    .article-link span { color: var(--purple); 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 40px 17px 2px; cursor: pointer; font-weight: 700; list-style: none; }
    .faq-item summary::-webkit-details-marker { display: none; }
    .faq-item summary::after { content: "+"; position: absolute; right: 6px; top: 13px; color: var(--purple); font-size: 23px; font-weight: 400; }
    .faq-item[open] summary::after { content: "−"; }
    .faq-item p { max-width: 850px; margin: 0; padding: 0 40px 17px 2px; color: var(--muted); font-size: 14px; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 9px; }
    .tag-cloud span { padding: 7px 11px; border: 1px solid #e2d8ef; border-radius: 5px; background: #fff; color: #5c4b75; font-size: 12px; }
    .contact-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 42px; align-items: start; }
    .contact-info { padding: 24px; background: #f1ebf8; border-radius: 8px; }
    .contact-info h3 { margin-bottom: 12px; }
    .contact-info p { margin-bottom: 9px; color: #554d62; font-size: 14px; }
    .qr-wrap { width: 140px; margin-top: 18px; padding: 8px; border: 1px solid #ddd2e8; background: #fff; }
    .qr-wrap img { display: block; width: 100%; }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field-full { grid-column: 1 / -1; }
    .field label { color: #50495c; font-size: 12px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid #ddd7e6; border-radius: 5px; background: #fff; color: var(--ink); outline: none; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: #9c76cd; box-shadow: 0 0 0 3px rgba(109,53,207,.1); }
    .field textarea { min-height: 110px; resize: vertical; }
    .contact-form .button { justify-self: start; }
    .footer { padding: 26px 0; border-top: 1px solid var(--line); background: #f1eef6; color: #373041; }
    .footer-row { display: flex; align-items: start; justify-content: space-between; gap: 24px; }
    .footer p { margin: 0; color: #625b6c; font-size: 12px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 16px; max-width: 650px; }
    .footer-links a { color: #514565; font-size: 12px; }
    .footer-links a:hover { color: var(--purple); }
    .float-contact { position: fixed; z-index: 15; right: 18px; bottom: 18px; display: grid; gap: 8px; }
    .float-contact a { padding: 10px 14px; border-radius: 6px; background: var(--purple-dark); color: #fff; box-shadow: 0 5px 18px rgba(52,30,86,.18); font-size: 12px; font-weight: 700; }
    .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: 980px) {
      .nav-links a { padding-inline: 8px; font-size: 12px; }
      .nav-cta { padding-inline: 12px; }
      .article-list { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .header-row { min-height: 66px; }
      .menu-toggle { display: inline-grid; place-items: center; }
      .nav-cta { display: none; }
      .nav-links { display: none; position: absolute; left: 0; right: 0; top: 66px; padding: 8px 16px 14px; border-bottom: 1px solid var(--line); background: #fbfaff; flex-direction: column; align-items: stretch; }
      .nav-links.is-open { display: flex; }
      .nav-links a { padding: 10px 8px; font-size: 14px; }
      .hero { padding: 53px 0 25px; }
      .hero-grid, .intro-layout, .contact-layout { grid-template-columns: 1fr; gap: 28px; }
      .hero-panel { max-width: 520px; }
      h1 { font-size: 42px; }
      .metric-row { grid-template-columns: 1fr 1fr; }
      .metric:nth-child(2) { border-right: 0; }
      .metric:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      .section { padding: 57px 0; }
      .service-grid { grid-template-columns: 1fr 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; gap: 24px 14px; }
      .workflow-item::after { display: none; }
      .testimonial-grid { grid-template-columns: 1fr 1fr; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .footer-row { flex-direction: column; }
    }
    @media (max-width: 480px) {
      .brand-name { font-size: 15px; }
      .hero-grid { gap: 24px; }
      h1 { font-size: 37px; }
      .hero-copy { font-size: 15px; }
      .hero-actions .button { flex: 1 1 100%; }
      .service-grid, .testimonial-grid, .image-grid, .case-side { grid-template-columns: 1fr; }
      .service-item { min-height: auto; }
      .workflow { grid-template-columns: 1fr 1fr; }
      .check-list { grid-template-columns: 1fr; }
      .contact-form { grid-template-columns: 1fr; }
      .field-full { grid-column: auto; }
      .float-contact { right: 10px; bottom: 10px; }
      .float-contact a { padding: 9px 11px; }
    }