:root {
      color-scheme: light;
      --ink: #191a25;
      --muted: #626371;
      --paper: #f7f7fa;
      --white: #fff;
      --line: #e4e3eb;
      --pink: #eb4f9b;
      --violet: #754cda;
      --cyan: #19aeb0;
      --yellow: #f4c84a;
      --night: #11121b;
      --max: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    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; }
    button, a { -webkit-tap-highlight-color: transparent; }
    .container { width: min(var(--max), calc(100% - 40px)); margin-inline: auto; }
    .topbar { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.96); border-bottom: 1px solid var(--line); backdrop-filter: blur(12px); }
    .nav { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
    .brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; font-weight: 800; white-space: nowrap; }
    .ai-page-logo { display: block; width: 42px; max-width: 100%; height: auto; }
    .brand-name { font-size: 18px; letter-spacing: 0; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; flex-wrap: wrap; gap: 0; }
    .nav-links a { text-decoration: none; color: #424350; font-size: 13px; padding: 9px 10px; border-radius: 5px; transition: color .2s, background .2s; }
    .nav-links a:hover { color: var(--violet); background: #f3efff; }
    .nav-cta, .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; border-radius: 5px; padding: 12px 18px; color: #fff; background: var(--pink); text-decoration: none; font-weight: 750; cursor: pointer; transition: transform .2s, box-shadow .2s, background .2s; }
    .nav-cta:hover, .button:hover { transform: translateY(-2px); box-shadow: 0 8px 22px rgba(235,79,155,.24); background: #d93c87; }
    .menu-toggle { display: none; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 5px; width: 42px; height: 42px; font-size: 20px; cursor: pointer; }
    .hero { position: relative; overflow: hidden; color: #fff; background: var(--night); }
    .hero::before { content: ""; position: absolute; inset: 0; opacity: .75; background: linear-gradient(115deg, transparent 0 40%, rgba(235,79,155,.18) 40% 40.3%, transparent 40.3% 70%, rgba(25,174,176,.17) 70% 70.3%, transparent 70.3%), radial-gradient(ellipse at 85% 18%, rgba(117,76,218,.26), transparent 34%); pointer-events: none; }
    .hero-inner { position: relative; display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(270px, .85fr); align-items: center; gap: 44px; padding-block: 76px 62px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: #f28fbd; text-transform: uppercase; font-size: 12px; font-weight: 800; letter-spacing: 0; }
    .eyebrow::before { content: ""; width: 22px; height: 2px; background: var(--pink); }
    h1 { max-width: 720px; margin: 18px 0 15px; font-size: clamp(38px, 6vw, 66px); line-height: 1.12; letter-spacing: 0; }
    .hero-copy { max-width: 650px; color: #d3d2dc; font-size: 17px; margin: 0 0 27px; }
    .hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 13px; }
    .button-outline { display: inline-flex; justify-content: center; align-items: center; padding: 11px 17px; border: 1px solid #747382; border-radius: 5px; color: #fff; text-decoration: none; font-weight: 700; transition: border-color .2s, background .2s; }
    .button-outline:hover { border-color: #f28fbd; background: rgba(255,255,255,.07); }
    .hero-note { margin: 17px 0 0; font-size: 12px; color: #aaa9b5; }
    .hero-panel { border: 1px solid rgba(255,255,255,.18); background: rgba(255,255,255,.055); padding: 23px; border-radius: 7px; }
    .hero-panel h2 { font-size: 16px; margin: 0 0 17px; color: #fff; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .model-cloud span { border: 1px solid rgba(255,255,255,.2); padding: 5px 9px; border-radius: 3px; color: #e8e7ee; font-size: 12px; }
    .hero-panel-foot { border-top: 1px solid rgba(255,255,255,.15); margin-top: 20px; padding-top: 15px; color: #c4c3ce; font-size: 13px; }
    .hero-panel-foot strong { color: #f28fbd; }
    .metrics { position: relative; padding: 0 0 28px; margin-top: -1px; color: #fff; background: var(--night); }
    .metric-row { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 1px solid rgba(255,255,255,.16); }
    .metric { padding: 19px 20px 12px 0; }
    .metric strong { display: block; color: #fff; font-size: 18px; }
    .metric span { color: #b8b7c3; font-size: 12px; }
    .section { padding: 70px 0; }
    .section-tint { background: #efedf5; }
    .section-white { background: #fff; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 22px; margin-bottom: 28px; }
    .section-head > div { max-width: 740px; }
    .kicker { margin: 0 0 7px; color: var(--violet); font-size: 12px; font-weight: 800; text-transform: uppercase; letter-spacing: 0; }
    h2 { margin: 0; font-size: 32px; line-height: 1.25; letter-spacing: 0; }
    .section-intro { margin: 10px 0 0; max-width: 760px; color: var(--muted); }
    .text-link { color: #6442bd; font-weight: 750; text-decoration: none; white-space: nowrap; }
    .text-link:hover { text-decoration: underline; }
    .intro-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
    .intro-copy p { margin: 0 0 14px; color: #50515e; }
    .intro-callout { padding: 22px; border-left: 3px solid var(--pink); background: #fff; }
    .intro-callout strong { display: block; font-size: 17px; margin-bottom: 6px; }
    .capability-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 24px; }
    .capability-list div { padding: 12px 0; border-bottom: 1px solid var(--line); }
    .capability-list strong { display: block; font-size: 14px; }
    .capability-list span { color: var(--muted); font-size: 12px; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .service-item { position: relative; padding: 20px 20px 18px; background: #fff; border: 1px solid var(--line); border-top: 2px solid var(--violet); transition: transform .22s, box-shadow .22s; }
    .service-item:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(29,25,52,.08); }
    .service-item:nth-child(3n+2) { border-top-color: var(--pink); }
    .service-item:nth-child(3n) { border-top-color: var(--cyan); }
    .service-item h3 { margin: 0 0 7px; font-size: 16px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-label { display: inline-block; margin-top: 12px; color: #6143b2; font-size: 11px; font-weight: 800; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; border-block: 1px solid var(--line); }
    .step { padding: 23px 22px 23px 0; position: relative; }
    .step + .step { padding-left: 22px; border-left: 1px solid var(--line); }
    .step-num { color: var(--pink); font-size: 12px; font-weight: 850; }
    .step h3 { margin: 8px 0 6px; font-size: 16px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }
    .industry-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px 26px; }
    .industry { padding: 17px 0; border-bottom: 1px solid var(--line); }
    .industry h3 { margin: 0 0 5px; font-size: 15px; }
    .industry p { margin: 0; color: var(--muted); font-size: 13px; }
    .network { display: grid; grid-template-columns: 1.1fr .9fr; gap: 36px; align-items: center; }
    .network-copy p { color: var(--muted); }
    .network-tags { display: flex; flex-wrap: wrap; gap: 9px; }
    .network-tags span { border: 1px solid #d7d3e4; background: #fff; padding: 7px 11px; border-radius: 3px; font-size: 12px; }
    .network-aside { background: #191a25; color: #fff; padding: 25px; border-radius: 5px; }
    .network-aside strong { display: block; font-size: 17px; margin-bottom: 8px; }
    .network-aside p { margin: 0; color: #d1d0d9; font-size: 13px; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .case { background: #fff; border-bottom: 2px solid var(--pink); padding: 19px; }
    .case:nth-child(2) { border-bottom-color: var(--cyan); }
    .case:nth-child(3) { border-bottom-color: var(--violet); }
    .case h3 { margin: 0 0 8px; font-size: 16px; }
    .case p { color: var(--muted); font-size: 13px; margin: 0; }
    .comparison-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { border-collapse: collapse; width: 100%; min-width: 720px; }
    th, td { padding: 13px 15px; border-bottom: 1px solid var(--line); text-align: left; font-size: 13px; vertical-align: top; }
    th { background: #f1eff7; color: #343341; font-weight: 800; }
    td:first-child { font-weight: 750; width: 22%; }
    .rating-strip { display: flex; align-items: center; flex-wrap: wrap; gap: 18px; padding: 17px 19px; background: #191a25; color: #fff; }
    .rating-strip strong { font-size: 19px; }
    .stars { color: var(--yellow); letter-spacing: 0; }
    .rating-strip span:last-child { color: #d0cfda; font-size: 13px; }
    .match-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 34px; align-items: start; }
    .match-copy h2 { margin-bottom: 12px; }
    .match-copy p { color: var(--muted); }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field-full { grid-column: 1 / -1; }
    .field label { font-size: 12px; font-weight: 750; }
    .field input, .field select, .field textarea { width: 100%; border: 1px solid #d9d8e1; border-radius: 4px; padding: 11px 12px; background: #fff; color: var(--ink); outline: none; }
    .field input:focus, .field select:focus, .field textarea:focus { border-color: var(--violet); box-shadow: 0 0 0 3px rgba(117,76,218,.12); }
    .field textarea { min-height: 105px; resize: vertical; }
    .form-note { color: var(--muted); font-size: 11px; margin: 9px 0 0; }
    .price-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 16px; }
    .price-item { border-left: 2px solid var(--cyan); padding: 4px 0 4px 15px; }
    .price-item strong { display: block; font-size: 15px; }
    .price-item span { color: var(--muted); font-size: 12px; }
    .faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 28px; }
    details { border-bottom: 1px solid var(--line); padding: 14px 0; }
    summary { cursor: pointer; list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 14px; font-size: 14px; font-weight: 750; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; color: var(--pink); font-size: 20px; line-height: 1; }
    details[open] summary::after { content: "−"; }
    details p { margin: 9px 28px 0 0; color: var(--muted); font-size: 13px; }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { padding: 19px; background: #fff; border: 1px solid var(--line); }
    .review p { margin: 0 0 14px; color: #454653; font-size: 13px; }
    .review strong { font-size: 12px; }
    .review span { display: block; color: var(--muted); font-size: 11px; }
    .article-links { display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px; }
    .article-links a { display: block; padding: 15px; background: #fff; border: 1px solid var(--line); color: var(--ink); text-decoration: none; font-size: 13px; font-weight: 700; transition: border-color .2s, color .2s; }
    .article-links a:hover { border-color: var(--pink); color: #bd2e77; }
    .media-row { display: grid; grid-template-columns: 1.2fr .8fr; gap: 18px; align-items: start; }
    .media-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
    .media-box { overflow: hidden; background: #e9e7ef; }
    .media-box img { display: block; width: 100%; max-width: 100%; height: auto; object-fit: contain; }
    .media-single { max-width: 420px; }
    .media-single .media-box { max-width: 320px; }
    .contact-band { background: #e9e5f2; }
    .contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 34px; align-items: start; }
    .contact-list { list-style: none; padding: 0; margin: 18px 0 0; }
    .contact-list li { padding: 8px 0; border-bottom: 1px solid #d6d1e2; font-size: 14px; }
    .contact-list strong { display: inline-block; min-width: 100px; }
    .qr-wrap { margin-top: 18px; width: min(180px, 100%); padding: 8px; background: #fff; }
    .qr-wrap img { width: 100%; height: auto; display: block; }
    .join-panel { padding: 23px; background: #fff; border-left: 3px solid var(--pink); }
    .join-panel h3 { margin: 0 0 8px; font-size: 17px; }
    .join-panel p { margin: 0 0 15px; color: var(--muted); font-size: 13px; }
    .footer { background: #11121b; color: #fff; padding: 28px 0; }
    .footer-inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .footer p { margin: 0; color: #c1c0cb; font-size: 12px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 6px 16px; }
    .footer a { color: #e2e0ea; font-size: 12px; text-decoration: none; }
    .footer a:hover { color: #f28fbd; }
    .footer-note { margin-top: 13px !important; }
    .float-contact { position: fixed; right: 18px; bottom: 20px; z-index: 15; display: flex; flex-direction: column; gap: 8px; }
    .float-contact a { display: block; background: #191a25; color: #fff; text-decoration: none; padding: 10px 13px; border-radius: 4px; font-size: 12px; box-shadow: 0 5px 18px rgba(20,18,36,.18); }
    .float-contact a:first-child { background: var(--pink); }
    .back-top { position: fixed; left: 18px; bottom: 20px; z-index: 14; display: none; border: 1px solid var(--line); border-radius: 4px; background: #fff; color: var(--ink); padding: 9px 12px; cursor: pointer; }
    .back-top.visible { display: block; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.is-visible { opacity: 1; transform: none; }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }
    @media (max-width: 900px) {
      .nav { min-height: 66px; }
      .menu-toggle { display: inline-grid; place-items: center; margin-left: auto; }
      .nav-cta { display: none; }
      .nav-links { display: none; position: absolute; top: 66px; left: 0; right: 0; padding: 10px 20px 16px; background: #fff; border-bottom: 1px solid var(--line); flex-direction: column; align-items: stretch; }
      .nav-links.is-open { display: flex; }
      .nav-links a { padding: 11px; }
      .hero-inner { grid-template-columns: 1fr; gap: 28px; padding-block: 59px 44px; }
      .hero-panel { max-width: 600px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .industry-grid { grid-template-columns: repeat(2, 1fr); }
      .article-links { grid-template-columns: repeat(3, 1fr); }
      .review-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 640px) {
      .container { width: min(var(--max), calc(100% - 30px)); }
      .brand-name { font-size: 16px; }
      .hero-inner { padding-block: 46px 36px; }
      h1 { font-size: 40px; }
      .hero-copy { font-size: 15px; }
      .metric-row { grid-template-columns: repeat(2, 1fr); }
      .metric { padding: 14px 10px 10px 0; }
      .section { padding: 51px 0; }
      .section-head { display: block; }
      h2 { font-size: 27px; }
      .text-link { display: inline-block; margin-top: 10px; }
      .intro-layout, .network, .match-layout, .contact-grid, .media-row { grid-template-columns: 1fr; gap: 23px; }
      .capability-list { grid-template-columns: 1fr 1fr; gap: 0 14px; }
      .service-grid, .industry-grid, .case-grid, .faq-grid, .review-grid { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; }
      .step { padding: 18px 12px 18px 0; }
      .step + .step { padding-left: 13px; }
      .step:nth-child(3) { border-left: 0; padding-left: 0; border-top: 1px solid var(--line); }
      .step:nth-child(4) { border-top: 1px solid var(--line); }
      .price-grid { grid-template-columns: 1fr; gap: 13px; }
      .article-links { grid-template-columns: 1fr 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .field-full { grid-column: auto; }
      .footer-inner { align-items: flex-start; flex-direction: column; }
      .float-contact { right: 10px; bottom: 12px; }
      .float-contact a { padding: 9px 11px; }
      .back-top { left: 10px; bottom: 12px; }
    }