:root {
      color-scheme: light;
      --ink: #252137;
      --muted: #696678;
      --paper: #f7f6fb;
      --white: #fff;
      --line: #e8e5ef;
      --violet: #6c42cb;
      --violet-dark: #4e2a9b;
      --pink: #dc4d9d;
      --mint: #087f72;
      --shadow: 0 16px 44px rgba(47, 32, 83, .08);
      --content: 1160px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 86px; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
      line-height: 1.7;
    }
    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(--content), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky;
      z-index: 20;
      top: 0;
      background: rgba(255,255,255,.94);
      border-bottom: 1px solid rgba(232,229,239,.9);
      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: 11px; flex: 0 0 auto; font-weight: 750; }
    .brand img { display: block; width: 39px; max-height: 42px; object-fit: contain; }
    .brand span { font-size: 17px; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 9px 10px; color: #565265; font-size: 13px; transition: color .2s ease; }
    .nav-links a:hover { color: var(--violet); }
    .nav-cta, .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      min-height: 44px;
      padding: 10px 18px;
      border: 1px solid transparent;
      border-radius: 5px;
      background: var(--violet);
      color: #fff;
      font-weight: 700;
      transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    }
    .nav-cta { flex: 0 0 auto; min-height: 40px; padding: 8px 14px; font-size: 13px; }
    .button:hover, .nav-cta:hover { transform: translateY(-2px); background: var(--violet-dark); box-shadow: 0 9px 20px rgba(108,66,203,.2); }
    .button.secondary { color: var(--ink); background: #fff; border-color: #dcd7e8; }
    .button.secondary:hover { color: var(--violet-dark); background: #f7f3ff; box-shadow: none; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 5px; background: #fff; color: var(--ink); cursor: pointer; }
    .hero {
      position: relative;
      overflow: hidden;
      color: #fff;
      background: linear-gradient(118deg, #402078 0%, #6538b2 52%, #a53c9f 100%);
    }
    .hero::before, .hero::after { content: ""; position: absolute; pointer-events: none; }
    .hero::before {
      width: 520px; height: 520px; right: -115px; top: -260px;
      border: 1px solid rgba(255,255,255,.15); border-radius: 50%;
      box-shadow: 0 0 0 46px rgba(255,255,255,.04), 0 0 0 94px rgba(255,255,255,.035);
    }
    .hero::after {
      width: 360px; height: 1px; right: 8%; bottom: 22%;
      background: linear-gradient(90deg, transparent, rgba(255,255,255,.52), transparent);
      transform: rotate(-31deg);
    }
    .hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(260px, .7fr); gap: 52px; align-items: center; padding-block: 84px 72px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: #f0dcff; font-size: 13px; font-weight: 700; }
    .eyebrow::before { content: ""; width: 22px; height: 2px; background: #f4a9da; }
    h1 { max-width: 730px; margin: 20px 0 16px; font-size: clamp(36px, 5vw, 60px); line-height: 1.16; font-weight: 780; }
    .hero-copy { max-width: 650px; margin: 0; color: rgba(255,255,255,.83); font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
    .hero .button { background: #fff; color: #472281; }
    .hero .button:hover { background: #f6edff; }
    .hero .button.secondary { color: #fff; border-color: rgba(255,255,255,.43); background: transparent; }
    .hero .button.secondary:hover { background: rgba(255,255,255,.11); }
    .hero-note { margin-top: 18px; color: rgba(255,255,255,.7); font-size: 13px; }
    .hero-panel { padding: 26px; border: 1px solid rgba(255,255,255,.24); background: rgba(37,14,77,.2); }
    .hero-panel h2 { margin: 0 0 18px; font-size: 16px; }
    .model-cloud { display: flex; flex-wrap: wrap; gap: 9px; }
    .model-cloud span { padding: 6px 10px; border: 1px solid rgba(255,255,255,.26); color: #fff; font-size: 12px; }
    .hero-panel p { margin: 17px 0 0; color: rgba(255,255,255,.72); font-size: 13px; }
    .signal-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; padding-block: 20px; background: #fff; border-bottom: 1px solid var(--line); }
    .signal { padding: 8px 20px; border-right: 1px solid var(--line); }
    .signal:last-child { border-right: 0; }
    .signal strong { display: block; color: var(--violet-dark); font-size: 17px; }
    .signal span { color: var(--muted); font-size: 12px; }
    .section { padding-block: 76px; }
    .section.tinted { background: #f0edf7; }
    .section.white { background: #fff; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 26px; margin-bottom: 30px; }
    .section-head > div { max-width: 720px; }
    .kicker { margin: 0 0 7px; color: var(--violet); font-size: 12px; font-weight: 750; text-transform: uppercase; }
    h2 { margin: 0; font-size: clamp(26px, 3.3vw, 38px); line-height: 1.25; }
    .section-desc { margin: 10px 0 0; color: var(--muted); }
    .text-link { color: var(--violet-dark); font-weight: 700; white-space: nowrap; }
    .intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 44px; align-items: start; }
    .intro-copy p { margin: 0 0 15px; color: var(--muted); }
    .intro-copy strong { color: var(--ink); }
    .capability-list { display: grid; grid-template-columns: 1fr 1fr; gap: 0 22px; margin: 0; padding: 0; list-style: none; }
    .capability-list li { padding: 13px 0; border-bottom: 1px solid var(--line); }
    .capability-list b { display: block; font-size: 14px; }
    .capability-list span { color: var(--muted); font-size: 12px; }
    .service-grid { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 14px; }
    .service-item { padding: 20px; border: 1px solid var(--line); background: #fff; transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease; }
    .service-item:hover { transform: translateY(-4px); border-color: #c9b8e9; box-shadow: var(--shadow); }
    .service-index { color: var(--pink); font-size: 11px; font-weight: 800; }
    .service-item h3 { margin: 9px 0 7px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 15px; }
    .service-tags span { padding: 3px 7px; background: #f4f0fa; color: #5e4a80; font-size: 11px; }
    .workflow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: steps; }
    .step { position: relative; padding: 4px 25px 4px 0; }
    .step:not(:last-child)::after { content: ""; position: absolute; left: 41px; right: 10px; top: 20px; border-top: 1px solid #d7cde8; }
    .step-no { position: relative; z-index: 1; display: grid; place-items: center; width: 42px; height: 42px; border: 1px solid #d7cde8; border-radius: 50%; background: #fff; color: var(--violet-dark); font-size: 13px; font-weight: 750; }
    .step h3 { margin: 15px 0 5px; font-size: 16px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }
    .industry-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 0 30px; }
    .industry { padding: 17px 0; border-top: 1px solid var(--line); }
    .industry h3 { margin: 0 0 5px; font-size: 16px; }
    .industry p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-network { display: grid; grid-template-columns: .8fr 1.2fr; gap: 40px; align-items: center; }
    .network-copy p { color: var(--muted); }
    .network-areas { display: flex; flex-wrap: wrap; gap: 9px; }
    .network-areas span { padding: 7px 11px; border: 1px solid #ded8e9; background: #fff; color: #4f4760; font-size: 13px; }
    .network-note { font-size: 13px; }
    .case-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 16px; align-items: stretch; }
    .case-feature { padding: 26px; background: linear-gradient(135deg,#412078,#7843bd); color: #fff; }
    .case-feature .case-label { color: #e7cdf8; font-size: 12px; }
    .case-feature h3 { margin: 10px 0; font-size: 24px; }
    .case-feature p { max-width: 650px; margin: 0; color: rgba(255,255,255,.81); }
    .case-feature .case-tags span { border-color: rgba(255,255,255,.3); color: #fff; }
    .case-side { display: grid; gap: 16px; }
    .case-row { padding: 21px; background: #f1eef7; }
    .case-row h3 { margin: 0 0 6px; font-size: 16px; }
    .case-row p { margin: 0; color: var(--muted); font-size: 13px; }
    .case-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 16px; }
    .case-tags span { padding: 4px 8px; border: 1px solid var(--line); font-size: 11px; }
    .rating-band { display: grid; grid-template-columns: .75fr 1.25fr; gap: 32px; align-items: center; margin-bottom: 22px; padding: 24px; border: 1px solid #e7dcef; background: #fff; }
    .rating-score { display: flex; align-items: center; gap: 18px; }
    .rating-score strong { color: var(--violet-dark); font-size: 54px; line-height: 1; }
    .stars { color: #d58b15; font-size: 20px; letter-spacing: 0; }
    .rating-score span { display: block; color: var(--muted); font-size: 12px; }
    .rating-copy { color: var(--muted); font-size: 14px; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; border-collapse: collapse; min-width: 690px; }
    th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; font-size: 13px; }
    th { background: #f2eef8; color: #46365d; font-size: 12px; }
    td:first-child { width: 21%; font-weight: 700; }
    tbody tr:last-child td { border-bottom: 0; }
    .positive { color: var(--mint); font-weight: 700; }
    .match-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 38px; align-items: start; }
    .match-copy p { color: var(--muted); }
    .match-copy ul { padding-left: 18px; color: var(--muted); }
    .form-panel { padding: 25px; background: #fff; border: 1px solid var(--line); }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 15px; }
    .field { display: grid; gap: 6px; }
    .field.full { 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 #dcd8e4; border-radius: 3px; 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(108,66,203,.1); }
    .field textarea { min-height: 112px; resize: vertical; }
    .form-bottom { display: flex; align-items: center; justify-content: space-between; gap: 15px; margin-top: 17px; }
    .form-hint { margin: 0; color: var(--muted); font-size: 12px; }
    .price-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: center; }
    .price-layout p { margin: 10px 0 0; color: var(--muted); }
    .price-points { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
    .price-point { padding: 16px; border-left: 3px solid var(--pink); background: #fff; }
    .price-point b { display: block; font-size: 14px; }
    .price-point span { color: var(--muted); font-size: 12px; }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 17px 38px 17px 0; cursor: pointer; list-style: none; font-weight: 700; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 5px; top: 13px; color: var(--violet); font-size: 22px; font-weight: 400; }
    details[open] summary::after { content: "−"; }
    details p { max-width: 860px; margin: -4px 38px 18px 0; color: var(--muted); font-size: 14px; }
    .review-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .review { padding: 19px; border-top: 2px solid var(--violet); background: #fff; }
    .review p { margin: 0; color: #555164; font-size: 13px; }
    .review footer { margin-top: 14px; color: var(--muted); font-size: 12px; }
    .review strong { color: var(--ink); }
    .knowledge-layout { display: grid; grid-template-columns: .75fr 1.25fr; gap: 35px; align-items: start; }
    .knowledge-copy p { color: var(--muted); }
    .knowledge-tags { display: flex; flex-wrap: wrap; gap: 8px; }
    .knowledge-tags a { padding: 6px 10px; border: 1px solid #ded8e9; color: #54476b; background: #fff; font-size: 12px; }
    .article-list { display: grid; grid-template-columns: repeat(5, 1fr); gap: 11px; }
    .article-link { display: flex; min-height: 110px; flex-direction: column; justify-content: space-between; padding: 15px; border: 1px solid var(--line); background: #fff; transition: border-color .2s ease, transform .2s ease; }
    .article-link:hover { transform: translateY(-3px); border-color: #baa6df; }
    .article-link span { color: var(--violet); font-size: 11px; }
    .article-link strong { font-size: 14px; line-height: 1.5; }
    .contact-strip { display: grid; grid-template-columns: 1fr auto; gap: 24px; align-items: center; padding: 25px; background: #ece7f4; }
    .contact-strip h2 { font-size: 24px; }
    .contact-strip p { margin: 7px 0 0; color: var(--muted); font-size: 13px; }
    .contact-links { display: flex; flex-wrap: wrap; gap: 10px; }
    .contact-links a { padding: 9px 12px; border: 1px solid #d5cce2; background: #fff; font-size: 13px; }
    .qr { width: 122px; padding: 8px; background: #fff; border: 1px solid var(--line); }
    .qr img { display: block; width: 100%; }
    .join-row { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 23px 0; border-bottom: 1px solid var(--line); }
    .join-row h3 { margin: 0 0 4px; font-size: 17px; }
    .join-row p { margin: 0; color: var(--muted); font-size: 13px; }
    .site-footer { padding: 28px 0; background: #29243a; color: #f5f2fb; }
    .footer-row { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .footer-brand { display: flex; align-items: center; gap: 11px; font-weight: 750; }
    .footer-brand img { width: 34px; max-height: 38px; object-fit: contain; }
    .footer-meta { color: #d0cadb; font-size: 12px; text-align: right; }
    .footer-meta a { color: #fff; }
    .float-help { position: fixed; z-index: 18; right: 18px; bottom: 20px; display: grid; gap: 8px; }
    .float-help a { display: grid; place-items: center; width: 46px; height: 46px; border: 1px solid #ddd4ec; background: #fff; color: var(--violet-dark); box-shadow: 0 6px 20px rgba(38,24,67,.12); font-size: 12px; font-weight: 750; }
    .reveal { opacity: 0; transform: translateY(14px); transition: opacity .55s ease, transform .55s ease; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @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: 980px) {
      .nav-row { gap: 12px; }
      .nav-links { gap: 0; }
      .nav-links a { padding-inline: 7px; font-size: 12px; }
      .service-grid { grid-template-columns: repeat(3,1fr); }
      .article-list { grid-template-columns: repeat(3,1fr); }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--content), calc(100% - 32px)); }
      .nav-row { min-height: 64px; }
      .menu-toggle { display: inline-grid; place-items: center; order: 3; }
      .nav-cta { margin-left: auto; }
      .nav-links { display: none; position: absolute; top: 64px; left: 0; right: 0; padding: 9px 16px 14px; background: #fff; border-bottom: 1px solid var(--line); box-shadow: 0 12px 18px rgba(35,23,59,.08); }
      .nav-links.open { display: grid; grid-template-columns: 1fr 1fr; }
      .nav-links a { padding: 10px 8px; font-size: 13px; }
      .hero-inner { grid-template-columns: 1fr; gap: 30px; padding-block: 58px 48px; }
      .hero-panel { max-width: 520px; }
      .signal-row { grid-template-columns: 1fr 1fr; }
      .signal:nth-child(2) { border-right: 0; }
      .signal:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
      .section { padding-block: 56px; }
      .section-head { align-items: start; flex-direction: column; gap: 12px; }
      .intro-grid, .service-network, .case-grid, .match-layout, .price-layout, .knowledge-layout { grid-template-columns: 1fr; gap: 24px; }
      .service-grid { grid-template-columns: repeat(2,1fr); }
      .industry-grid { grid-template-columns: repeat(2,1fr); gap: 0 20px; }
      .workflow { grid-template-columns: repeat(2,1fr); gap: 25px 10px; }
      .step:nth-child(2)::after { display: none; }
      .rating-band { grid-template-columns: 1fr; gap: 14px; }
      .review-grid { grid-template-columns: repeat(2,1fr); }
      .article-list { grid-template-columns: repeat(2,1fr); }
      .contact-strip { grid-template-columns: 1fr; }
      .footer-row { align-items: flex-start; flex-direction: column; }
      .footer-meta { text-align: left; }
    }
    @media (max-width: 480px) {
      h1 { font-size: 36px; }
      .hero-copy { font-size: 15px; }
      .hero-actions { display: grid; grid-template-columns: 1fr; }
      .hero-actions .button { width: 100%; }
      .service-grid, .industry-grid, .review-grid, .capability-list { grid-template-columns: 1fr; }
      .workflow { grid-template-columns: 1fr 1fr; }
      .step { padding-right: 8px; }
      .step:not(:last-child)::after { right: 0; }
      .step:nth-child(2)::after { display: none; }
      .form-grid, .price-points { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .form-bottom { align-items: flex-start; flex-direction: column; }
      .rating-score strong { font-size: 46px; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .join-row { align-items: flex-start; flex-direction: column; }
    }