:root {
      color-scheme: light;
      --ink: #202338;
      --muted: #626a7e;
      --paper: #f7f8fc;
      --white: #fff;
      --line: #e5e8f0;
      --violet: #6547ef;
      --pink: #e64791;
      --cyan: #12aab8;
      --lime: #c8e64c;
      --navy: #222b4b;
      --container: 1160px;
    }
    * { 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", "Noto Sans 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; }
    img { display: block; max-width: 100%; height: auto; }
    .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(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: 19px; }
    .ai-page-logo { width: 38px; height: 38px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; min-width: 0; }
    .nav-links a { color: #464b60; font-size: 14px; padding: 10px 11px; border-radius: 6px; transition: color .2s, background .2s; }
    .nav-links a:hover { color: var(--violet); background: #f0edff; }
    .nav-actions { display: flex; align-items: center; gap: 10px; flex: 0 0 auto; }
    .menu-toggle { display: none; }
    .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      min-height: 46px; padding: 0 19px; border: 0; border-radius: 6px;
      background: var(--violet); color: #fff; font-weight: 700; cursor: pointer;
      box-shadow: 0 8px 18px rgba(101,71,239,.2);
      transition: transform .2s, box-shadow .2s, background .2s;
    }
    .button:hover { transform: translateY(-2px); box-shadow: 0 12px 24px rgba(101,71,239,.25); background: #5233db; }
    .button:active { transform: translateY(0); }
    .button-outline { background: #fff; color: var(--ink); border: 1px solid var(--line); box-shadow: none; }
    .button-outline:hover { background: #f6f3ff; color: var(--violet); }
    .button-bright { background: var(--lime); color: #252b3c; box-shadow: none; }
    .button-bright:hover { background: #d8f467; }
    .hero {
      position: relative; overflow: hidden; padding: 74px 0 54px;
      background: linear-gradient(118deg, #f6edff 0%, #f4f7ff 53%, #e9fbf8 100%);
      border-bottom: 1px solid #e7e8f0;
    }
    .hero::before {
      content: ""; position: absolute; width: 440px; height: 280px; right: -100px; top: -130px;
      border: 1px solid rgba(101,71,239,.18); border-radius: 48% 52% 61% 39%;
      transform: rotate(-19deg); box-shadow: 0 0 0 30px rgba(230,71,145,.035), 0 0 0 62px rgba(18,170,184,.03);
      animation: drift 10s ease-in-out infinite alternate;
    }
    .hero::after {
      content: ""; position: absolute; width: 170px; height: 170px; left: 47%; bottom: -120px;
      border-radius: 50%; background: rgba(200,230,76,.35); filter: blur(1px);
    }
    .hero-content { position: relative; z-index: 1; max-width: 850px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: #5140bb; font-size: 13px; font-weight: 800; }
    .eyebrow::before { content: ""; width: 26px; height: 3px; border-radius: 2px; background: var(--pink); }
    h1 { margin: 18px 0 16px; max-width: 800px; font-size: clamp(38px, 6vw, 68px); line-height: 1.12; letter-spacing: 0; }
    .hero h1 span { color: var(--violet); }
    .hero-copy { max-width: 690px; margin: 0; color: #51596d; font-size: 18px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
    .hero-points { display: flex; flex-wrap: wrap; gap: 11px 22px; margin-top: 31px; color: #4f566b; font-size: 14px; }
    .hero-points span::before { content: "✓"; color: #0b9b87; font-weight: 900; margin-right: 7px; }
    .hero-strip { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; margin-top: 53px; border-top: 1px solid rgba(70,74,105,.16); }
    .metric { padding: 19px 22px 0 0; }
    .metric strong { display: block; font-size: 18px; }
    .metric span { color: var(--muted); font-size: 13px; }
    main { overflow: hidden; }
    .section { padding: 76px 0; }
    .section-white { background: #fff; }
    .section-tint { background: #f0f4ff; }
    .section-dark { background: var(--navy); color: #fff; }
    .section-heading { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .section-heading > div { max-width: 720px; }
    .section-kicker { color: var(--pink); text-transform: uppercase; font-weight: 800; font-size: 12px; letter-spacing: 0; }
    h2 { margin: 6px 0 8px; font-size: 32px; line-height: 1.25; letter-spacing: 0; }
    h3 { margin: 0 0 9px; font-size: 18px; line-height: 1.4; }
    .section-heading p, .lead { margin: 0; color: var(--muted); }
    .section-dark .section-heading p, .section-dark .lead { color: #c7cce0; }
    .intro-layout { display: grid; grid-template-columns: 1.1fr .9fr; gap: 50px; align-items: start; }
    .intro-copy p { margin: 0 0 15px; color: #545c70; }
    .capability-list { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 0 24px; margin: 18px 0 0; padding: 0; list-style: none; }
    .capability-list li { padding: 11px 0; border-bottom: 1px solid var(--line); color: #40465b; }
    .capability-list li::before { content: "＋"; margin-right: 8px; color: var(--pink); font-weight: 800; }
    .model-panel { padding: 24px; background: var(--navy); color: #fff; border-radius: 8px; }
    .model-panel p { color: #c8cee2; margin: 0 0 18px; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .tag { display: inline-flex; padding: 6px 10px; border: 1px solid rgba(255,255,255,.22); border-radius: 4px; color: #f4f3ff; font-size: 13px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; }
    .service-item { padding: 21px; background: #fff; border: 1px solid var(--line); border-top: 3px solid var(--violet); transition: transform .2s, box-shadow .2s; }
    .service-item:nth-child(3n+2) { border-top-color: var(--pink); }
    .service-item:nth-child(3n) { border-top-color: var(--cyan); }
    .service-item:hover { transform: translateY(-4px); box-shadow: 0 12px 28px rgba(37,42,77,.08); }
    .service-item p { margin: 0; color: var(--muted); font-size: 14px; }
    .service-item .service-type { display: block; margin-bottom: 10px; color: #7d61d8; font-size: 12px; font-weight: 800; }
    .workflow { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 18px; counter-reset: step; }
    .workflow article { position: relative; padding: 20px 18px 17px; border-top: 1px solid #bbc2d8; }
    .workflow article::before { counter-increment: step; content: "0" counter(step); display: block; margin-bottom: 14px; color: var(--pink); font-size: 22px; font-weight: 800; }
    .workflow p { margin: 0; color: var(--muted); font-size: 14px; }
    .industry-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 10px; }
    .industry-item { padding: 17px; background: #fff; border-left: 3px solid var(--cyan); }
    .industry-item strong { display: block; margin-bottom: 4px; }
    .industry-item span { color: var(--muted); font-size: 13px; }
    .network-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; align-items: center; }
    .network-note { padding: 24px; background: #fff; border-left: 4px solid var(--pink); }
    .network-note p { color: var(--muted); margin: 0; }
    .media-pair { display: grid; grid-template-columns: 1.25fr .75fr; gap: 14px; align-items: start; }
    .media-pair figure { margin: 0; }
    .media-pair img { width: 100%; border-radius: 6px; border: 1px solid var(--line); }
    .media-pair figcaption { margin-top: 7px; color: var(--muted); font-size: 13px; }
    .review-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; }
    .review { padding: 20px; background: #fff; border: 1px solid var(--line); }
    .review p { margin: 0 0 16px; color: #50576c; }
    .review strong { display: block; font-size: 14px; }
    .review span { color: var(--muted); font-size: 12px; }
    .rating-block { display: flex; align-items: center; gap: 26px; margin-bottom: 26px; }
    .rating-score { color: var(--lime); font-size: 48px; font-weight: 850; line-height: 1; }
    .rating-score small { font-size: 15px; color: #d7d9e5; }
    .stars { color: var(--lime); font-size: 23px; letter-spacing: 0; }
    .table-wrap { overflow-x: auto; border: 1px solid rgba(255,255,255,.18); border-radius: 6px; }
    .comparison { width: 100%; min-width: 640px; border-collapse: collapse; text-align: left; }
    .comparison th, .comparison td { padding: 13px 15px; border-bottom: 1px solid rgba(255,255,255,.14); }
    .comparison th { color: #e4e7f1; background: rgba(255,255,255,.07); font-size: 13px; }
    .comparison td { color: #d0d5e6; font-size: 14px; }
    .comparison tr:last-child td { border-bottom: 0; }
    .comparison td:first-child { color: #fff; font-weight: 700; }
    .comparison .highlight { color: var(--lime); font-weight: 700; }
    .pair-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: start; }
    .price-note { padding: 22px; background: #fff; border: 1px solid var(--line); }
    .price-note p { margin: 0 0 10px; color: var(--muted); }
    .price-note strong { color: var(--violet); }
    .cases { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 14px; }
    .case { background: #fff; border: 1px solid var(--line); overflow: hidden; }
    .case img { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
    .case-body { padding: 17px; }
    .case-body p { margin: 0; color: var(--muted); font-size: 14px; }
    .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: 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(--violet); font-size: 23px; transition: transform .2s; }
    .faq-item[open] summary::after { transform: rotate(45deg); }
    .faq-item p { margin: -3px 36px 17px 0; color: var(--muted); }
    .article-list { display: grid; grid-template-columns: repeat(5, minmax(0,1fr)); gap: 12px; }
    .article-link { min-height: 106px; padding: 15px; display: flex; flex-direction: column; justify-content: space-between; background: #fff; border: 1px solid var(--line); transition: border-color .2s, transform .2s; }
    .article-link:hover { border-color: var(--violet); transform: translateY(-3px); }
    .article-link span { color: var(--muted); font-size: 12px; }
    .article-link strong { line-height: 1.45; }
    .contact-layout { display: grid; grid-template-columns: .82fr 1.18fr; gap: 42px; align-items: start; }
    .contact-details { margin: 20px 0 0; padding: 0; list-style: none; }
    .contact-details li { padding: 10px 0; border-bottom: 1px solid var(--line); color: #4f566b; }
    .contact-details strong { color: var(--ink); }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 22px; background: #fff; border: 1px solid var(--line); }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field-wide { grid-column: 1 / -1; }
    .field label { font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; padding: 11px 12px; border: 1px solid #d8dce7; border-radius: 4px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 118px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid rgba(101,71,239,.2); border-color: var(--violet); }
    .form-footnote { grid-column: 1 / -1; margin: -4px 0 0; color: var(--muted); font-size: 12px; }
    .footer { padding: 28px 0; background: #fff; color: #303549; border-top: 1px solid var(--line); }
    .footer-row { display: flex; align-items: center; justify-content: space-between; gap: 22px; }
    .footer p { margin: 0; color: #5c6275; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 17px; color: #4d5368; font-size: 13px; }
    .footer-links a:hover { color: var(--violet); }
    .footer-bottom { margin-top: 17px; padding-top: 14px; border-top: 1px solid var(--line); color: #73798a; font-size: 12px; }
    .float-contact { position: fixed; right: 18px; bottom: 20px; z-index: 18; display: flex; flex-direction: column; gap: 9px; }
    .float-contact a, .float-contact button { width: 48px; height: 48px; display: grid; place-items: center; border: 0; border-radius: 50%; background: var(--violet); color: #fff; font-weight: 800; cursor: pointer; box-shadow: 0 6px 18px rgba(30,35,66,.2); }
    .float-contact button { background: var(--navy); font-size: 18px; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: translateY(0); }
    @keyframes drift { to { transform: rotate(-9deg) translateY(16px); } }
    @media (max-width: 980px) {
      .nav-row { gap: 12px; }
      .nav-links a { padding-inline: 7px; font-size: 13px; }
      .nav-actions .button-outline { display: none; }
      .service-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .industry-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .article-list { grid-template-columns: repeat(3, minmax(0,1fr)); }
    }
    @media (max-width: 700px) {
      html { scroll-padding-top: 68px; }
      .container { width: min(var(--container), calc(100% - 32px)); }
      .nav-row { min-height: 64px; }
      .brand { font-size: 17px; }
      .ai-page-logo { width: 33px; height: 33px; }
      .menu-toggle { display: inline-grid; place-items: center; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 5px; background: #fff; color: var(--ink); font-size: 20px; cursor: pointer; }
      .nav-actions { margin-left: auto; }
      .nav-actions .button { min-height: 40px; padding-inline: 12px; font-size: 13px; }
      .nav-links { display: none; position: absolute; top: 63px; left: 0; right: 0; padding: 9px 16px 15px; align-items: stretch; flex-direction: column; background: #fff; border-bottom: 1px solid var(--line); box-shadow: 0 12px 18px rgba(30,35,66,.08); }
      .nav-links.is-open { display: flex; }
      .nav-links a { padding: 9px 10px; }
      .hero { padding: 54px 0 35px; }
      h1 { font-size: 42px; }
      .hero-copy { font-size: 16px; }
      .hero-strip { grid-template-columns: repeat(2,1fr); margin-top: 34px; }
      .metric { padding: 15px 8px 0 0; }
      .section { padding: 56px 0; }
      .section-heading { display: block; }
      .section-heading > .button { margin-top: 15px; }
      h2 { font-size: 27px; }
      .intro-layout, .network-layout, .pair-grid, .contact-layout { grid-template-columns: 1fr; gap: 24px; }
      .service-grid { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
      .industry-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .review-grid, .cases { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: repeat(2, minmax(0,1fr)); }
      .contact-form { padding: 16px; }
      .footer-row { align-items: flex-start; flex-direction: column; }
      .float-contact { right: 12px; bottom: 12px; }
      .float-contact a, .float-contact button { width: 44px; height: 44px; }
    }
    @media (max-width: 420px) {
      .nav-actions .button { padding-inline: 9px; font-size: 12px; }
      .hero-actions .button { width: 100%; }
      .capability-list { grid-template-columns: 1fr; }
      .contact-form { grid-template-columns: 1fr; }
      .field-wide, .form-footnote { grid-column: auto; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }