:root {
      color-scheme: light;
      --ink: #201b2c;
      --muted: #675f75;
      --line: #e7e2ee;
      --paper: #f8f7fb;
      --white: #fff;
      --purple: #6c3de5;
      --purple-dark: #4c26b8;
      --lime: #d9f36a;
      --pink: #f2c9e8;
      --teal: #d5f0ed;
      --container: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 90px; }
    body {
      margin: 0;
      background: var(--paper);
      color: var(--ink);
      font-family: Inter, "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; }
    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;
      background: rgba(248,247,251,.94);
      border-bottom: 1px solid rgba(32,27,44,.08);
      backdrop-filter: blur(14px);
    }
    .nav-row { min-height: 74px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
    .brand { display: inline-flex; flex: 0 0 auto; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; }
    .ai-page-logo { display: block; width: 38px; max-height: 38px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; }
    .nav-links a { padding: 9px 11px; color: #50495c; font-size: 13px; white-space: nowrap; transition: color .2s ease; }
    .nav-links a:hover { color: var(--purple); }
    .nav-cta, .button {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      min-height: 46px;
      padding: 0 19px;
      border: 1px solid transparent;
      border-radius: 4px;
      background: var(--purple);
      color: #fff;
      font-size: 14px;
      font-weight: 700;
      transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
    }
    .nav-cta { flex: 0 0 auto; min-height: 40px; padding-inline: 15px; font-size: 13px; }
    .button:hover, .nav-cta:hover { transform: translateY(-2px); background: var(--purple-dark); box-shadow: 0 8px 20px rgba(76,38,184,.18); }
    .button-outline { background: transparent; color: var(--ink); border-color: #bbb3c8; }
    .button-outline:hover { color: #fff; }
    .menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: #fff; color: var(--ink); border-radius: 4px; cursor: pointer; }
    .hero {
      position: relative;
      overflow: hidden;
      background: #eeebf7;
      border-bottom: 1px solid #e2dced;
    }
    .hero::before {
      position: absolute;
      top: -130px;
      right: -90px;
      width: 540px;
      height: 540px;
      border: 1px solid rgba(108,61,229,.18);
      border-radius: 50%;
      content: "";
      box-shadow: 0 0 0 42px rgba(108,61,229,.035), 0 0 0 86px rgba(108,61,229,.025);
      animation: orbit 24s linear infinite;
    }
    .hero::after {
      position: absolute;
      right: 15%;
      bottom: 16%;
      width: 110px;
      height: 110px;
      border: 1px solid rgba(76,38,184,.18);
      background: rgba(217,243,106,.68);
      content: "";
      transform: rotate(28deg);
      animation: float 6s ease-in-out infinite;
    }
    .hero-inner { position: relative; z-index: 1; padding-block: 92px 68px; }
    .hero-copy { max-width: 760px; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: var(--purple-dark); font-size: 12px; font-weight: 800; letter-spacing: 1px; text-transform: uppercase; }
    .eyebrow::before { width: 22px; height: 2px; background: var(--purple); content: ""; }
    h1 { max-width: 760px; margin: 18px 0 18px; font-size: clamp(42px, 6vw, 72px); line-height: 1.08; letter-spacing: 0; }
    .hero-copy p { max-width: 650px; margin: 0; color: #50495d; font-size: 17px; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 29px; }
    .hero-note { margin-top: 20px; color: #665e73; font-size: 12px; }
    .hero-strip { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 65px; border-top: 1px solid #d8d1e2; }
    .hero-stat { padding: 20px 20px 0 0; }
    .hero-stat strong { display: block; color: var(--purple-dark); font-size: 18px; }
    .hero-stat span { color: #625b6e; font-size: 12px; }
    section { padding: 76px 0; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .section-head > div { max-width: 690px; }
    .kicker { margin: 0 0 8px; color: var(--purple-dark); font-size: 12px; font-weight: 800; letter-spacing: 1px; }
    h2 { margin: 0; font-size: clamp(27px, 3.5vw, 40px); line-height: 1.2; letter-spacing: 0; }
    .section-lead { max-width: 620px; margin: 12px 0 0; color: var(--muted); }
    .text-link { color: var(--purple-dark); font-size: 14px; font-weight: 700; white-space: nowrap; }
    .about-band { background: #fff; }
    .about-grid { display: grid; grid-template-columns: 1fr 1.05fr; gap: 62px; align-items: center; }
    .about-copy p { color: var(--muted); }
    .about-mark { padding: 28px 30px; border-left: 3px solid var(--purple); background: #f4f1fa; color: #433b52; font-size: 18px; }
    .capability-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 28px; margin: 24px 0 0; padding: 0; list-style: none; }
    .capability-list li { padding: 13px 0; border-bottom: 1px solid var(--line); font-size: 14px; }
    .capability-list b { display: block; margin-bottom: 3px; }
    .capability-list span { color: var(--muted); font-size: 12px; }
    .services-section { background: #f0edf7; }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: #dcd5e8; border: 1px solid #dcd5e8; }
    .service-item { min-height: 188px; padding: 24px; background: #f8f7fb; transition: background .2s ease, transform .2s ease; }
    .service-item:hover { position: relative; z-index: 1; transform: translateY(-3px); background: #fff; }
    .service-index { color: var(--purple); font-size: 12px; font-weight: 800; }
    .service-item h3 { margin: 10px 0 7px; font-size: 18px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 24px; }
    .service-tags span { padding: 6px 10px; border: 1px solid #d8d2e1; color: #4f465e; font-size: 12px; }
    .workflow-section { background: #fff; }
    .steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; counter-reset: step; }
    .step { position: relative; padding-top: 18px; border-top: 2px solid #d9d2e3; counter-increment: step; }
    .step::before { display: block; margin-bottom: 18px; color: var(--purple); font-size: 13px; font-weight: 800; content: "0" counter(step); }
    .step h3 { margin: 0 0 8px; font-size: 17px; }
    .step p { margin: 0; color: var(--muted); font-size: 13px; }
    .solutions-section { background: #e9f3f1; }
    .solution-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 42px; }
    .solution-block { padding-top: 20px; border-top: 2px solid #201b2c; }
    .solution-block h3 { margin: 0 0 10px; font-size: 20px; }
    .solution-block p { margin: 0 0 14px; color: #514d58; }
    .solution-block ul { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 20px; margin: 0; padding-left: 18px; color: #514d58; font-size: 13px; }
    .network-band { background: #282137; color: #fff; }
    .network-band .kicker { color: #d9f36a; }
    .network-band h2 { color: #fff; }
    .network-band .section-lead { color: #d5cfdf; }
    .model-list { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 26px; }
    .model-list span { padding: 8px 12px; border: 1px solid #655c74; color: #f4f0f8; font-size: 13px; }
    .network-meta { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 40px; padding-top: 25px; border-top: 1px solid #51485f; }
    .network-meta strong { display: block; margin-bottom: 5px; color: #d9f36a; }
    .network-meta span { color: #d5cfdf; font-size: 13px; }
    .showcase-section { background: #f8f7fb; }
    .showcase-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 18px; align-items: stretch; }
    .showcase-feature { display: grid; grid-template-columns: 1fr 1fr; background: #fff; border: 1px solid var(--line); }
    .showcase-feature .media { display: flex; align-items: center; overflow: hidden; background: #eeeaf4; }
    .showcase-feature .media img { display: block; width: 100%; height: auto; object-fit: contain; }
    .showcase-copy { align-self: center; padding: 25px; }
    .showcase-copy h3 { margin: 0 0 9px; font-size: 20px; }
    .showcase-copy p { margin: 0; color: var(--muted); font-size: 13px; }
    .showcase-side { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .showcase-tile { display: flex; flex-direction: column; justify-content: space-between; min-height: 190px; padding: 22px; }
    .showcase-tile:first-child { background: var(--pink); }
    .showcase-tile:last-child { background: var(--lime); }
    .showcase-tile h3 { margin: 0; font-size: 18px; }
    .showcase-tile p { margin: 12px 0 0; color: #433b4a; font-size: 13px; }
    .review-section { background: #fff; }
    .review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { padding: 21px; border: 1px solid var(--line); background: #fff; }
    .review blockquote { margin: 0; color: #443d50; font-size: 14px; }
    .review footer { margin-top: 18px; color: var(--muted); font-size: 12px; }
    .review footer strong { display: block; color: var(--ink); font-size: 13px; }
    .compare-section { background: #f0edf7; }
    .rating-line { display: flex; align-items: center; gap: 15px; margin: 0 0 22px; }
    .rating-score { color: var(--purple-dark); font-size: 34px; font-weight: 800; }
    .rating-stars { color: #a24887; font-size: 19px; letter-spacing: 2px; }
    .rating-line small { color: var(--muted); }
    .table-wrap { overflow-x: auto; border: 1px solid #ded8e8; background: #fff; }
    table { width: 100%; min-width: 720px; border-collapse: collapse; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid #ece8f0; font-size: 13px; vertical-align: top; }
    th { background: #e8e2f2; color: #352b45; font-size: 12px; }
    td:first-child { width: 22%; font-weight: 700; }
    td:nth-child(2) { color: var(--purple-dark); font-weight: 700; }
    .price-section { background: #fff; }
    .price-note { display: grid; grid-template-columns: 1fr auto; gap: 28px; align-items: center; padding: 25px 28px; background: #d9f36a; }
    .price-note h3 { margin: 0 0 5px; font-size: 20px; }
    .price-note p { margin: 0; color: #454a29; font-size: 13px; }
    .industry-section { background: #f7f5fa; }
    .industry-layout { display: grid; grid-template-columns: .85fr 1.15fr; gap: 48px; align-items: start; }
    .industry-layout p { color: var(--muted); }
    .industry-links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 22px; }
    .industry-links a { padding: 14px 0; border-bottom: 1px solid var(--line); font-weight: 700; font-size: 14px; }
    .industry-links a span { display: block; color: var(--muted); font-size: 12px; font-weight: 400; }
    .faq-section { background: #fff; }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; padding: 18px 42px 18px 0; cursor: pointer; font-weight: 700; list-style: none; }
    summary::-webkit-details-marker { display: none; }
    summary::after { position: absolute; right: 4px; top: 15px; color: var(--purple); font-size: 21px; content: "+"; transition: transform .2s ease; }
    details[open] summary::after { transform: rotate(45deg); }
    details p { max-width: 850px; margin: -4px 0 18px; color: var(--muted); font-size: 14px; }
    .articles-section { background: #e9f3f1; }
    .article-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .article-link { display: flex; min-height: 104px; align-items: center; justify-content: space-between; gap: 15px; padding: 18px; border: 1px solid #c8dfdc; background: rgba(255,255,255,.76); font-weight: 700; font-size: 14px; }
    .article-link span:last-child { color: var(--purple); font-size: 20px; }
    .contact-section { background: #282137; color: #fff; }
    .contact-section .kicker { color: #d9f36a; }
    .contact-section h2 { color: #fff; }
    .contact-section .section-lead { color: #d5cfdf; }
    .contact-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 54px; align-items: start; }
    .contact-details { display: grid; gap: 17px; margin-top: 28px; }
    .contact-details div { padding-bottom: 14px; border-bottom: 1px solid #51485f; }
    .contact-details strong { display: block; color: #d9f36a; font-size: 13px; }
    .contact-details span, .contact-details a { color: #f3eff8; font-size: 14px; }
    .contact-form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; padding: 24px; background: #fff; color: var(--ink); }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { font-size: 12px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-height: 44px; padding: 10px 12px; border: 1px solid #d8d2e1; border-radius: 2px; background: #fff; color: var(--ink); }
    .field textarea { min-height: 106px; resize: vertical; }
    .contact-form .button { grid-column: 1 / -1; justify-self: start; cursor: pointer; }
    .join-band { padding: 32px 0; background: #d9f36a; }
    .join-row { display: flex; align-items: center; justify-content: space-between; gap: 20px; }
    .join-row h2 { font-size: 23px; }
    .join-row p { margin: 5px 0 0; color: #454a29; font-size: 13px; }
    .site-footer { background: #f8f7fb; color: var(--ink); }
    .footer-main { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; padding: 28px 0 20px; }
    .footer-links { display: flex; flex-wrap: wrap; align-content: start; gap: 8px 18px; }
    .footer-links a { color: #50495c; font-size: 12px; }
    .footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 18px; padding: 14px 0; border-top: 1px solid var(--line); color: #625b6e; font-size: 12px; }
    .float-contact { position: fixed; z-index: 15; right: 18px; bottom: 20px; display: grid; justify-items: center; gap: 8px; }
    .float-contact a { display: grid; width: 52px; height: 52px; place-items: center; border: 1px solid #e0d9ec; border-radius: 50%; background: #fff; color: var(--purple-dark); box-shadow: 0 6px 20px rgba(32,27,44,.12); font-size: 12px; font-weight: 800; transition: transform .2s ease; }
    .float-contact a:hover { transform: translateY(-3px); }
    .float-contact .top-link { 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 orbit { to { transform: rotate(360deg); } }
    @keyframes float { 50% { transform: translateY(-10px) rotate(38deg); } }
    @media (max-width: 1060px) {
      .nav-row { gap: 12px; }
      .nav-links { position: absolute; top: 73px; right: 20px; left: 20px; display: none; align-items: stretch; padding: 10px; border: 1px solid var(--line); background: #fff; box-shadow: 0 14px 30px rgba(32,27,44,.12); }
      .nav-links.is-open { display: grid; grid-template-columns: repeat(3, 1fr); }
      .nav-links a { padding: 10px; white-space: normal; }
      .menu-toggle { display: inline-grid; place-items: center; margin-left: auto; }
    }
    @media (max-width: 760px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .nav-row { min-height: 66px; }
      .nav-links { top: 65px; right: 16px; left: 16px; }
      .nav-cta { padding-inline: 11px; font-size: 12px; }
      .brand { font-size: 16px; }
      .ai-page-logo { width: 32px; max-height: 32px; }
      .hero-inner { padding-block: 68px 40px; }
      h1 { font-size: 44px; }
      .hero-copy p { font-size: 15px; }
      .hero-strip { grid-template-columns: repeat(2, 1fr); gap: 14px 8px; margin-top: 45px; }
      .hero-stat { padding-right: 4px; }
      section { padding: 58px 0; }
      .section-head { display: block; }
      .section-head .text-link { display: inline-block; margin-top: 14px; }
      .about-grid, .solution-grid, .industry-layout, .contact-grid { grid-template-columns: 1fr; gap: 28px; }
      .capability-list { gap: 0 16px; }
      .service-grid { grid-template-columns: repeat(2, 1fr); }
      .service-item { padding: 19px; }
      .steps { grid-template-columns: repeat(2, 1fr); gap: 25px 18px; }
      .solution-block ul { grid-template-columns: 1fr; }
      .network-meta { grid-template-columns: 1fr; gap: 15px; }
      .showcase-grid { grid-template-columns: 1fr; }
      .review-grid { grid-template-columns: repeat(2, 1fr); }
      .article-grid { grid-template-columns: repeat(2, 1fr); }
      .price-note { grid-template-columns: 1fr; }
      .join-row { align-items: flex-start; flex-direction: column; }
      .footer-main { grid-template-columns: 1fr; gap: 18px; }
      .footer-bottom { align-items: flex-start; flex-direction: column; }
    }
    @media (max-width: 480px) {
      .hero::before { right: -310px; }
      .hero::after { right: 9%; bottom: 23%; width: 64px; height: 64px; }
      h1 { font-size: 39px; }
      .hero-actions .button { width: 100%; }
      .nav-cta { min-height: 36px; }
      .nav-links.is-open { grid-template-columns: repeat(2, 1fr); }
      .service-grid, .steps, .review-grid, .article-grid, .industry-links { grid-template-columns: 1fr; }
      .showcase-feature { grid-template-columns: 1fr; }
      .showcase-feature .media { max-height: 230px; }
      .showcase-side { grid-template-columns: 1fr 1fr; }
      .showcase-tile { min-height: 174px; padding: 16px; }
      .contact-form { grid-template-columns: 1fr; padding: 18px; }
      .field.full, .contact-form .button { grid-column: auto; }
      .float-contact { right: 10px; bottom: 12px; }
      .float-contact a { width: 46px; height: 46px; }
    }
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }