:root {
      color-scheme: dark;
      --ink: #f6f2fb;
      --muted: #b8afc5;
      --base: #100c18;
      --panel: #191322;
      --line: #35273e;
      --pink: #ff4dba;
      --violet: #a277ff;
      --cyan: #60e2e0;
      --lime: #c5f27b;
      --max: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; scroll-padding-top: 88px; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--base);
      font-family: Inter, "Microsoft YaHei", "PingFang SC", 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(--max), calc(100% - 40px)); margin-inline: auto; }
    .site-header {
      position: sticky; top: 0; z-index: 20;
      background: rgba(16, 12, 24, .94);
      border-bottom: 1px solid rgba(255,255,255,.09);
      backdrop-filter: blur(16px);
    }
    .nav-row { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 22px; }
    .brand { display: flex; align-items: center; flex: 0 0 auto; }
    .ai-page-logo { display: block; width: 142px; max-height: 46px; object-fit: contain; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { color: #d5cddd; font-size: 12px; padding: 8px 7px; transition: color .2s ease; }
    .nav-links a:hover, .nav-links a:focus-visible { color: var(--cyan); }
    .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; font-weight: 700; cursor: pointer; transition: transform .2s, box-shadow .2s, background .2s;
    }
    .nav-cta, .button-primary { color: #190d1d; background: linear-gradient(110deg, #ff62bc, #c18aff); }
    .button-secondary { color: var(--ink); border-color: #715286; background: #21182c; }
    .button:hover, .nav-cta:hover { transform: translateY(-2px); box-shadow: 0 9px 28px rgba(255,77,186,.2); }
    .menu-toggle { display: none; color: var(--ink); border: 1px solid var(--line); background: var(--panel); border-radius: 5px; padding: 8px 12px; }
    .hero {
      position: relative; overflow: hidden; isolation: isolate;
      background:
        linear-gradient(115deg, rgba(255,77,186,.09), transparent 45%),
        linear-gradient(285deg, rgba(162,119,255,.12), transparent 48%),
        var(--base);
      border-bottom: 1px solid var(--line);
    }
    .hero::before {
      content: ""; position: absolute; z-index: -1; inset: 0;
      background: repeating-linear-gradient(90deg, transparent 0 79px, rgba(255,255,255,.025) 80px),
                  repeating-linear-gradient(0deg, transparent 0 79px, rgba(255,255,255,.025) 80px);
      mask-image: linear-gradient(to bottom, black, transparent 88%);
    }
    .hero-inner { padding-block: 72px 52px; }
    .hero-copy { max-width: 780px; }
    .eyebrow { color: var(--cyan); font-size: 12px; font-weight: 800; letter-spacing: 0; text-transform: uppercase; }
    h1 { max-width: 720px; margin: 14px 0 16px; font-size: clamp(38px, 6vw, 66px); line-height: 1.12; letter-spacing: 0; }
    .hero h1 span { color: var(--pink); }
    .hero-copy p { max-width: 650px; color: var(--muted); font-size: 17px; margin: 0; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 27px; }
    .hero-note { color: #a99cb6; font-size: 12px; margin-top: 14px; }
    .hero-stats { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 50px; border-top: 1px solid var(--line); }
    .hero-stat { padding: 19px 20px 0 0; }
    .hero-stat + .hero-stat { border-left: 1px solid var(--line); padding-left: 22px; }
    .hero-stat strong { display: block; color: var(--ink); font-size: 18px; }
    .hero-stat span { display: block; color: var(--muted); font-size: 12px; }
    main { overflow: hidden; }
    .section { padding-block: 72px; border-bottom: 1px solid rgba(255,255,255,.07); }
    .section-heading { max-width: 760px; margin-bottom: 30px; }
    .section-heading h2 { margin: 5px 0 9px; font-size: clamp(25px, 4vw, 38px); line-height: 1.22; }
    .section-heading p { margin: 0; color: var(--muted); }
    .section-kicker { color: var(--pink); font-size: 12px; font-weight: 800; }
    .intro-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 36px; align-items: start; }
    .intro-copy p { color: var(--muted); margin: 0 0 14px; }
    .feature-list { list-style: none; padding: 0; margin: 0; border-top: 1px solid var(--line); }
    .feature-list li { padding: 13px 0; border-bottom: 1px solid var(--line); display: flex; gap: 12px; color: #e6dfeb; }
    .feature-list li::before { content: "✦"; color: var(--cyan); }
    .service-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .service-item { padding: 21px; border: 1px solid var(--line); background: linear-gradient(145deg, #1b1524, #15101c); transition: transform .2s, border-color .2s; }
    .service-item:hover { transform: translateY(-3px); border-color: #9256a5; }
    .service-item h3 { margin: 0 0 7px; font-size: 17px; }
    .service-item p { color: var(--muted); font-size: 13px; margin: 0; }
    .service-number { color: var(--pink); font-size: 11px; font-weight: 800; margin-bottom: 10px; }
    .model-band { margin-top: 28px; padding: 22px; border-left: 3px solid var(--cyan); background: #15111c; }
    .model-band strong { display: block; margin-bottom: 10px; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .tag { color: #d9cced; border: 1px solid #453451; padding: 5px 10px; font-size: 12px; }
    .process { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; counter-reset: step; }
    .process article { counter-increment: step; padding: 5px 20px 5px 0; }
    .process article + article { border-left: 1px solid var(--line); padding-left: 20px; }
    .process article::before { content: "0" counter(step); color: var(--pink); font-size: 13px; font-weight: 800; }
    .process h3 { margin: 8px 0 5px; font-size: 17px; }
    .process p { margin: 0; color: var(--muted); font-size: 13px; }
    .solution-row { display: grid; grid-template-columns: 1fr 1.25fr; gap: 26px; align-items: center; }
    .solution-copy p { color: var(--muted); }
    .solution-images { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
    .media-frame { border: 1px solid var(--line); background: #1a1421; overflow: hidden; }
    .media-frame img { display: block; width: 100%; height: auto; }
    .media-caption { color: #d5cddd; font-size: 12px; padding: 9px 12px; }
    .solution-square { display: grid; grid-template-columns: 180px 1fr; align-items: center; gap: 24px; margin-top: 28px; padding-top: 24px; border-top: 1px solid var(--line); }
    .solution-square .media-frame { width: 180px; }
    .solution-square p { color: var(--muted); margin: 7px 0 0; }
    .compare-wrap { overflow-x: auto; border: 1px solid var(--line); }
    table { width: 100%; border-collapse: collapse; min-width: 720px; background: #17121e; }
    th, td { padding: 13px 15px; text-align: left; border-bottom: 1px solid var(--line); }
    th { color: var(--cyan); font-size: 13px; }
    td { color: #e3dce9; font-size: 13px; }
    td:first-child { color: var(--muted); }
    .rating { display: grid; grid-template-columns: auto 1fr; align-items: center; gap: 22px; padding: 22px; margin-bottom: 20px; background: linear-gradient(100deg, #29162d, #1b1524); border: 1px solid #61385f; }
    .rating-score { color: var(--pink); font-size: 38px; font-weight: 800; line-height: 1; }
    .rating-score small { display: block; color: var(--muted); font-size: 12px; font-weight: 500; margin-top: 7px; }
    .stars { color: #ffd36b; letter-spacing: 0; }
    .rating p { color: var(--muted); margin: 3px 0 0; font-size: 13px; }
    .case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .case-item { border-top: 2px solid var(--violet); padding: 18px 17px; background: #191421; }
    .case-item h3 { margin: 0 0 7px; font-size: 16px; }
    .case-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .reviews { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
    .review { border: 1px solid var(--line); padding: 18px; background: #17121e; }
    .review blockquote { margin: 0 0 15px; color: #e7dfed; font-size: 14px; }
    .review cite { color: var(--cyan); font-size: 12px; font-style: normal; }
    .article-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 28px; border-top: 1px solid var(--line); }
    .article-list a { padding: 13px 0; color: #e8e0ed; border-bottom: 1px solid var(--line); }
    .article-list a::after { content: "↗"; float: right; color: var(--pink); }
    .faq-list { border-top: 1px solid var(--line); }
    details { border-bottom: 1px solid var(--line); }
    summary { position: relative; cursor: pointer; list-style: none; padding: 15px 32px 15px 0; font-weight: 650; }
    summary::-webkit-details-marker { display: none; }
    summary::after { content: "+"; position: absolute; right: 4px; color: var(--pink); font-size: 20px; top: 10px; }
    details[open] summary::after { content: "−"; }
    details p { color: var(--muted); margin: 0; padding: 0 28px 16px 0; font-size: 14px; }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 42px; align-items: start; }
    .contact-info p { color: var(--muted); }
    .contact-info a { color: var(--cyan); }
    .contact-facts { padding: 0; margin: 22px 0 0; list-style: none; }
    .contact-facts li { padding: 10px 0; border-bottom: 1px solid var(--line); color: #e1d9e7; }
    .contact-facts span { color: var(--muted); display: inline-block; min-width: 92px; }
    .contact-qr { margin-top: 20px; width: 150px; border: 1px solid var(--line); padding: 8px; background: #fff; }
    .contact-qr img { display: block; width: 100%; }
    form { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: flex; flex-direction: column; gap: 6px; }
    .field-full { grid-column: 1 / -1; }
    label { color: #ddd5e4; font-size: 13px; }
    input, select, textarea { width: 100%; color: var(--ink); background: #17121e; border: 1px solid #493953; border-radius: 3px; padding: 11px 12px; }
    input:focus, select:focus, textarea:focus { outline: 2px solid rgba(96,226,224,.45); border-color: var(--cyan); }
    textarea { min-height: 112px; resize: vertical; }
    select option { background: #17121e; }
    .form-status { grid-column: 1 / -1; color: var(--cyan); font-size: 13px; margin: 0; }
    .site-footer { background: #0c0911; color: #ddd5e4; }
    .footer-main { padding-block: 34px 24px; display: grid; grid-template-columns: 1fr 1.4fr; gap: 30px; }
    .footer-main p { color: var(--muted); margin: 8px 0 0; font-size: 13px; }
    .footer-links { display: flex; flex-wrap: wrap; align-content: start; gap: 8px 18px; }
    .footer-links a { color: #d8cce2; font-size: 13px; }
    .footer-links a:hover { color: var(--cyan); }
    .footer-bottom { border-top: 1px solid #302637; padding-block: 13px; color: #a99eaf; font-size: 12px; }
    .footer-bottom-inner { display: flex; justify-content: space-between; gap: 15px; flex-wrap: wrap; }
    .floating { position: fixed; right: 18px; bottom: 20px; z-index: 15; display: flex; flex-direction: column; gap: 8px; }
    .floating a { display: grid; place-items: center; width: 46px; height: 46px; border: 1px solid #674779; background: #21172b; color: var(--ink); font-size: 11px; text-align: center; box-shadow: 0 5px 22px #0008; }
    .floating a:hover { color: var(--cyan); border-color: var(--cyan); }
    .reveal { opacity: 0; transform: translateY(12px); 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; transition-duration: .01ms !important; animation-duration: .01ms !important; }
      .reveal { opacity: 1; transform: none; }
    }
    @media (max-width: 980px) {
      .menu-toggle { display: inline-flex; align-items: center; gap: 7px; }
      .nav-row { position: relative; }
      .nav-links { display: none; position: absolute; top: 100%; left: 0; right: 0; padding: 12px; background: #17121e; border: 1px solid var(--line); justify-content: flex-start; }
      .nav-links.is-open { display: flex; }
      .nav-links a { padding: 8px 10px; }
      .nav-cta { display: none; }
    }
    @media (max-width: 720px) {
      .container { width: min(var(--max), calc(100% - 30px)); }
      .hero-inner { padding-block: 53px 36px; }
      .hero-stats { grid-template-columns: 1fr 1fr; }
      .hero-stat { padding-bottom: 13px; }
      .hero-stat:nth-child(3) { border-left: 0; padding-left: 0; }
      .section { padding-block: 52px; }
      .intro-grid, .solution-row, .contact-grid { grid-template-columns: 1fr; gap: 24px; }
      .service-grid, .case-grid, .reviews { grid-template-columns: 1fr 1fr; }
      .process { grid-template-columns: 1fr 1fr; gap: 22px 0; }
      .process article:nth-child(3) { border-left: 0; padding-left: 0; }
      .footer-main { grid-template-columns: 1fr; }
    }
    @media (max-width: 480px) {
      .container { width: calc(100% - 28px); }
      .ai-page-logo { width: 120px; }
      .hero-copy p { font-size: 15px; }
      .hero-stats { margin-top: 35px; }
      .service-grid, .case-grid, .reviews, .article-list { grid-template-columns: 1fr; }
      .solution-square { grid-template-columns: 118px 1fr; gap: 14px; }
      .solution-square .media-frame { width: 118px; }
      .rating { grid-template-columns: 1fr; gap: 12px; }
      form { grid-template-columns: 1fr; }
      .field-full, .form-status { grid-column: auto; }
      .floating { right: 9px; bottom: 12px; }
    }