:root {
      --ink: #201a31;
      --muted: #6d6680;
      --purple: #7135db;
      --violet: #a44cff;
      --pink: #e553b8;
      --lavender: #f5f0ff;
      --line: #e8e0f5;
      --white: #fff;
      --green: #18866c;
      --shadow: 0 18px 50px rgba(76, 39, 141, .11);
      --container: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: #fff;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.7;
    }
    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; height: auto; display: block; }
    .container { width: min(var(--container), calc(100% - 40px)); margin: 0 auto; }
    .topbar {
      position: sticky; top: 0; z-index: 20;
      background: rgba(255,255,255,.94);
      border-bottom: 1px solid rgba(232,224,245,.9);
      backdrop-filter: blur(16px);
    }
    .nav {
      min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px;
    }
    .brand { display: inline-flex; align-items: center; min-width: 128px; }
    .ai-page-logo { width: 128px; }
    .nav-links { display: flex; gap: 0; align-items: center; justify-content: flex-end; flex-wrap: wrap; }
    .nav-links a { color: #514960; font-size: 14px; padding: 8px 10px; transition: color .2s, background .2s; }
    .nav-links a:hover { color: var(--purple); background: var(--lavender); }
    .nav-cta, .button {
      display: inline-flex; align-items: center; justify-content: center; gap: 8px;
      border: 0; border-radius: 8px; padding: 12px 20px; font-weight: 700; cursor: pointer;
      transition: transform .2s, box-shadow .2s, background .2s;
    }
    .nav-cta, .button-primary { color: #fff; background: linear-gradient(110deg, #6930cf, #b23dca); box-shadow: 0 10px 25px rgba(112,53,219,.24); }
    .button-secondary { color: var(--purple); background: #fff; border: 1px solid #d7c5f5; }
    .button:hover { transform: translateY(-2px); box-shadow: 0 14px 28px rgba(77, 36, 143, .2); }
    .menu-toggle { display: none; border: 1px solid var(--line); background: #fff; border-radius: 7px; font-size: 22px; padding: 5px 10px; color: var(--purple); }
    .hero {
      position: relative; overflow: hidden; padding: 92px 0 76px;
      background: linear-gradient(135deg, #fff 0%, #fbf8ff 52%, #f1e8ff 100%);
    }
    .hero:before, .hero:after {
      content: ""; position: absolute; border-radius: 50%; pointer-events: none; filter: blur(2px);
    }
    .hero:before { width: 360px; height: 360px; right: -120px; top: -100px; background: rgba(182,99,255,.18); }
    .hero:after { width: 240px; height: 240px; left: -90px; bottom: -100px; background: rgba(229,83,184,.12); }
    .hero-grid { position: relative; z-index: 1; display: grid; grid-template-columns: 1.12fr .88fr; gap: 60px; align-items: center; }
    .eyebrow { color: var(--purple); font-size: 13px; letter-spacing: 2px; font-weight: 800; }
    h1, h2, h3 { line-height: 1.2; margin: 0 0 18px; letter-spacing: 0; }
    h1 { font-size: clamp(38px, 5vw, 68px); max-width: 680px; }
    h2 { font-size: clamp(28px, 4vw, 42px); }
    h3 { font-size: 20px; }
    .hero-copy { color: var(--muted); font-size: 18px; max-width: 650px; margin: 0 0 28px; }
    .actions { display: flex; gap: 12px; flex-wrap: wrap; }
    .hero-panel { padding: 26px; border-left: 4px solid var(--pink); background: rgba(255,255,255,.72); box-shadow: var(--shadow); }
    .hero-panel strong { display: block; font-size: 30px; color: var(--purple); margin-bottom: 8px; }
    .hero-panel p { color: var(--muted); margin: 0 0 20px; }
    .signal { display: grid; grid-template-columns: repeat(2,1fr); gap: 12px; }
    .signal-item { padding: 16px; background: #fff; border: 1px solid var(--line); }
    .signal-item b { display: block; font-size: 23px; color: var(--ink); }
    .signal-item span { color: var(--muted); font-size: 13px; }
    section { padding: 84px 0; }
    .section-head { display: flex; justify-content: space-between; align-items: end; gap: 28px; margin-bottom: 34px; }
    .section-head p { max-width: 600px; color: var(--muted); margin: 0; }
    .soft { background: #faf8ff; }
    .metrics { display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; margin-top: 24px; }
    .metric { padding: 22px; background: #fff; border-top: 3px solid var(--violet); box-shadow: 0 10px 26px rgba(82,42,141,.07); }
    .metric b { display: block; font-size: 30px; color: var(--purple); }
    .metric span { color: var(--muted); font-size: 14px; }
    .intro-grid { display: grid; grid-template-columns: .9fr 1.1fr; gap: 42px; align-items: start; }
    .intro-note { padding: 30px; background: linear-gradient(140deg, #5e2cc8, #a842c5); color: #fff; }
    .intro-note p { color: #f4eaff; margin: 0; }
    .intro-note h3 { font-size: 28px; }
    .feature-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
    .feature-card, .comment-card, .case-card { background: #fff; border: 1px solid var(--line); padding: 24px; transition: transform .25s, box-shadow .25s; }
    .feature-card:hover, .comment-card:hover, .case-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); }
    .feature-card .num { color: var(--pink); font-weight: 800; font-size: 13px; }
    .feature-card p, .comment-card p, .case-card p { color: var(--muted); margin: 0; }
    .service-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 14px; }
    .service { padding: 20px; background: #fff; border: 1px solid var(--line); min-height: 164px; }
    .service b { color: var(--purple); display: block; margin-bottom: 8px; }
    .service p { color: var(--muted); font-size: 14px; margin: 0; }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 25px; }
    .tag { padding: 7px 13px; color: #5d37a0; background: #f0e9ff; border: 1px solid #dfd0fa; border-radius: 100px; font-size: 13px; }
    .steps { display: grid; grid-template-columns: repeat(5,1fr); gap: 0; border-top: 1px solid var(--line); }
    .step { position: relative; padding: 28px 18px 0 0; }
    .step:before { content: ""; width: 12px; height: 12px; background: var(--pink); border: 4px solid #f8e5fa; border-radius: 50%; position: absolute; top: -8px; left: 0; }
    .step strong { display: block; color: var(--purple); margin-bottom: 8px; }
    .step p { color: var(--muted); font-size: 14px; margin: 0; padding-right: 12px; }
    .solution-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
    .solution { padding: 28px; background: #fff; border: 1px solid var(--line); }
    .solution h3 { color: var(--purple); }
    .solution ul { padding-left: 20px; margin: 0; color: var(--muted); }
    .solution li { margin: 8px 0; }
    .gallery { display: grid; grid-template-columns: 1.15fr .85fr .85fr; gap: 16px; align-items: stretch; }
    .gallery figure { margin: 0; background: #f4effb; overflow: hidden; }
    .gallery img { width: 100%; height: 100%; object-fit: cover; }
    .gallery figure:first-child { grid-row: span 2; }
    .gallery figure:first-child img { min-height: 390px; }
    .gallery figure:not(:first-child) img { min-height: 185px; }
    .caption { padding: 13px 15px; color: var(--ink); font-weight: 700; background: #fff; }
    .table-wrap { overflow-x: auto; background: #fff; border: 1px solid var(--line); }
    table { width: 100%; min-width: 720px; border-collapse: collapse; }
    th, td { text-align: left; padding: 16px; border-bottom: 1px solid var(--line); }
    th { color: #fff; background: #6d32d9; font-weight: 700; }
    td { color: var(--muted); }
    td:first-child { color: var(--ink); font-weight: 700; }
    .score { display: grid; grid-template-columns: 180px 1fr; gap: 28px; align-items: center; padding: 28px; margin-bottom: 22px; background: linear-gradient(120deg, #f3eaff, #fff5fb); }
    .score strong { color: var(--purple); font-size: 48px; line-height: 1; display: block; }
    .stars { color: #e19a24; letter-spacing: 3px; font-size: 23px; }
    .price-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
    .price { padding: 26px; border: 1px solid var(--line); background: #fff; }
    .price.featured { border: 2px solid var(--purple); box-shadow: var(--shadow); }
    .price strong { font-size: 32px; color: var(--purple); display: block; margin: 12px 0; }
    .price p { color: var(--muted); margin: 0; }
    .comments { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
    .comment-card cite { display: block; color: var(--purple); font-weight: 700; font-style: normal; margin-top: 18px; }
    .case-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 18px; }
    .case-card span { color: var(--pink); font-size: 13px; font-weight: 700; }
    .faq-list { max-width: 900px; }
    details { border-bottom: 1px solid var(--line); padding: 18px 0; }
    summary { cursor: pointer; font-weight: 700; color: var(--ink); list-style: none; display: flex; justify-content: space-between; }
    summary:after { content: "+"; color: var(--purple); font-size: 22px; line-height: 1; }
    details[open] summary:after { content: "−"; }
    details p { color: var(--muted); max-width: 820px; margin: 12px 30px 0 0; }
    .article-list { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
    .article { padding: 21px; border-left: 3px solid var(--pink); background: #fff; border-top: 1px solid var(--line); border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); }
    .article small { color: var(--purple); }
    .article h3 { font-size: 18px; margin: 10px 0 0; }
    .form-layout { display: grid; grid-template-columns: .8fr 1.2fr; gap: 38px; align-items: start; }
    .contact-box { padding: 28px; background: #2d1c50; color: #fff; }
    .contact-box p { color: #ded0f4; }
    .contact-line { padding: 12px 0; border-bottom: 1px solid rgba(255,255,255,.16); }
    .contact-line b { display: block; color: #fff; }
    .contact-line span { color: #d7c9ee; font-size: 14px; }
    form { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
    label { display: grid; gap: 7px; color: var(--ink); font-weight: 700; font-size: 14px; }
    input, select, textarea { width: 100%; border: 1px solid #dcd2ec; border-radius: 6px; padding: 12px 13px; font: inherit; color: var(--ink); background: #fff; }
    textarea { min-height: 130px; resize: vertical; }
    .full { grid-column: 1 / -1; }
    .form-note { color: var(--muted); font-size: 13px; margin: 0; }
    .footer { background: #24183d; color: #fff; padding: 46px 0 24px; }
    .footer-grid { display: grid; grid-template-columns: 1.2fr .8fr .8fr; gap: 30px; }
    .footer p, .footer a { color: #cfc4e1; font-size: 14px; }
    .footer h3 { color: #fff; font-size: 18px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 10px 18px; }
    .copyright { border-top: 1px solid rgba(255,255,255,.14); margin-top: 30px; padding-top: 18px; color: #a99cbe; font-size: 13px; }
    .float-service { position: fixed; right: 20px; bottom: 22px; z-index: 15; }
    .float-service button { border: 0; border-radius: 50%; width: 56px; height: 56px; color: #fff; background: #7135db; box-shadow: 0 10px 25px rgba(62,25,123,.28); cursor: pointer; font-size: 21px; }
    .qr-pop { display: none; position: absolute; right: 0; bottom: 68px; width: 180px; padding: 12px; background: #fff; box-shadow: var(--shadow); border: 1px solid var(--line); }
    .qr-pop.show { display: block; }
    .qr-pop img { width: 156px; margin: auto; }
    .reveal { opacity: 0; transform: translateY(18px); transition: opacity .65s, transform .65s; }
    .reveal.visible { opacity: 1; transform: translateY(0); }
    @media (max-width: 980px) {
      .nav-links { display: none; position: absolute; top: 76px; left: 0; right: 0; background: #fff; padding: 14px 20px 20px; border-bottom: 1px solid var(--line); }
      .nav-links.open { display: grid; grid-template-columns: repeat(2,1fr); }
      .nav-links a { padding: 10px; }
      .menu-toggle { display: block; }
      .hero-grid, .intro-grid, .form-layout { grid-template-columns: 1fr; }
      .service-grid { grid-template-columns: repeat(2,1fr); }
      .steps { grid-template-columns: repeat(3,1fr); gap: 20px; border-top: 0; }
      .step { border-top: 1px solid var(--line); }
      .step:before { top: -8px; }
    }
    @media (max-width: 680px) {
      .container { width: min(var(--container), calc(100% - 28px)); }
      section { padding: 60px 0; }
      .hero { padding: 65px 0 55px; }
      .nav { min-height: 68px; }
      .brand { min-width: 105px; }
      .ai-page-logo { width: 105px; }
      .nav-cta { display: none; }
      .metrics, .feature-grid, .comments, .case-grid, .article-list, .price-grid, .solution-grid, .service-grid { grid-template-columns: 1fr; }
      .steps { grid-template-columns: 1fr; gap: 0; }
      .step { padding-bottom: 22px; }
      .gallery { grid-template-columns: 1fr 1fr; }
      .gallery figure:first-child { grid-column: 1 / -1; grid-row: auto; }
      .gallery figure:first-child img { min-height: 230px; }
      .gallery figure:not(:first-child) img { min-height: 150px; }
      .section-head { display: block; }
      .section-head p { margin-top: 14px; }
      .score { grid-template-columns: 1fr; }
      form { grid-template-columns: 1fr; }
      .full { grid-column: auto; }
      .footer-grid { grid-template-columns: 1fr; }
    }