:root {
      color-scheme: light;
      --ink: #172338;
      --muted: #5c6b81;
      --line: #dce5f1;
      --paper: #f5f8ff;
      --white: #fff;
      --blue: #315efb;
      --cyan: #00aeb8;
      --lime: #c7f36b;
      --pink: #ff637e;
      --navy: #14243a;
      --container: 1180px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: Inter, "PingFang SC", "Microsoft YaHei", system-ui, 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; }
    .container { width: min(var(--container), calc(100% - 40px)); margin-inline: auto; }
    .site-header { position: sticky; top: 0; z-index: 20; background: rgba(255,255,255,.94); border-bottom: 1px solid var(--line); backdrop-filter: blur(14px); }
    .nav-wrap { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
    .brand { flex: 0 0 auto; display: flex; align-items: center; gap: 10px; font-weight: 800; }
    .ai-page-logo { display: block; width: 42px; max-width: 100%; height: auto; }
    .brand-name { font-size: 17px; }
    .nav-links { display: flex; align-items: center; justify-content: flex-end; gap: 0; flex-wrap: wrap; }
    .nav-links a { padding: 8px 7px; color: #526176; font-size: 12px; transition: color .2s ease; }
    .nav-links a:hover { color: var(--blue); }
    .nav-cta, .button { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; border-radius: 5px; padding: 12px 18px; background: var(--blue); color: #fff; font-weight: 700; box-shadow: 0 8px 20px rgba(49,94,251,.2); transition: transform .2s, box-shadow .2s; }
    .nav-cta:hover, .button:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(49,94,251,.28); }
    .menu-toggle { display: none; width: 42px; height: 40px; border: 1px solid var(--line); border-radius: 5px; background: white; color: var(--ink); cursor: pointer; }
    .hero { position: relative; overflow: hidden; padding: 76px 0 48px; background: linear-gradient(118deg,#f9fbff 0%,#eef4ff 54%,#e9fffc 100%); border-bottom: 1px solid #dce8f4; }
    .hero::before { content: ""; position: absolute; inset: 0; pointer-events: none; opacity: .35; background-image: linear-gradient(rgba(49,94,251,.09) 1px, transparent 1px),linear-gradient(90deg,rgba(49,94,251,.09) 1px,transparent 1px); background-size: 42px 42px; mask-image: linear-gradient(to bottom,black,transparent 85%); }
    .hero-inner { position: relative; }
    .eyebrow { display: inline-flex; align-items: center; gap: 9px; color: #3d5da4; font-size: 13px; font-weight: 700; }
    .eyebrow::before { content: ""; width: 26px; height: 2px; background: var(--cyan); }
    h1 { max-width: 800px; margin: 18px 0 16px; font-size: clamp(38px, 6vw, 68px); line-height: 1.1; letter-spacing: 0; }
    .hero p { max-width: 680px; margin: 0; color: var(--muted); font-size: 17px; }
    .hero-actions { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 28px; }
    .button.secondary { background: white; color: var(--ink); border: 1px solid #cfd9e9; box-shadow: none; }
    .hero-note { margin-top: 18px !important; font-size: 13px !important; }
    .hero-strip { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; margin-top: 56px; border-top: 1px solid #cbd9eb; }
    .metric { padding: 20px 18px 0 0; }
    .metric strong { display: block; font-size: 22px; line-height: 1.3; }
    .metric span { color: var(--muted); font-size: 13px; }
    .section { padding: 72px 0; }
    .section.tinted { background: #edf3ff; }
    .section.dark { background: var(--navy); color: white; }
    .section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 30px; }
    .section-head h2 { margin: 0; font-size: clamp(27px,4vw,38px); line-height: 1.2; }
    .section-head p { max-width: 540px; margin: 0; color: var(--muted); }
    .dark .section-head p { color: #c4d1e2; }
    .kicker { display: block; margin-bottom: 9px; color: var(--cyan); font-size: 12px; font-weight: 800; text-transform: uppercase; }
    .intro-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: start; }
    .intro-grid h2 { margin: 0 0 16px; font-size: 34px; line-height: 1.25; }
    .intro-grid p { color: var(--muted); }
    .feature-list { display: grid; grid-template-columns: repeat(2,1fr); gap: 14px 24px; margin: 26px 0 0; padding: 0; list-style: none; }
    .feature-list li { display: flex; gap: 10px; align-items: start; font-size: 14px; }
    .feature-list li::before { content: "↗"; color: var(--cyan); font-weight: 800; }
    .accent-panel { padding: 26px; border-left: 3px solid var(--pink); background: #fff; }
    .accent-panel strong { display: block; margin-bottom: 8px; font-size: 20px; }
    .accent-panel p { margin: 0; font-size: 14px; }
    .service-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .service-item { min-height: 148px; padding: 20px; border: 1px solid var(--line); border-top: 3px solid var(--blue); background: rgba(255,255,255,.8); transition: transform .2s, border-color .2s; }
    .service-item:nth-child(3n+2) { border-top-color: var(--cyan); }
    .service-item:nth-child(3n) { border-top-color: var(--pink); }
    .service-item:hover { transform: translateY(-3px); border-color: #aabce0; }
    .service-item h3 { margin: 0 0 7px; font-size: 17px; }
    .service-item p { margin: 0; color: var(--muted); font-size: 13px; }
    .service-more { margin-top: 20px; color: var(--muted); font-size: 13px; }
    .service-more strong { color: var(--ink); }
    .workflow { display: grid; grid-template-columns: repeat(4,1fr); gap: 0; counter-reset: step; border-block: 1px solid #30445e; }
    .workflow article { position: relative; padding: 24px 22px 26px 0; counter-increment: step; }
    .workflow article + article { padding-left: 22px; border-left: 1px solid #30445e; }
    .workflow article::before { content: "0" counter(step); display: block; margin-bottom: 24px; color: var(--lime); font-size: 13px; font-weight: 800; }
    .workflow h3 { margin: 0 0 7px; font-size: 17px; }
    .workflow p { margin: 0; color: #c4d1e2; font-size: 13px; }
    .case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
    .case { display: grid; grid-template-columns: 1fr 1fr; align-items: center; gap: 20px; padding: 16px; background: white; border: 1px solid var(--line); }
    .case-media { overflow: hidden; background: #edf3fb; }
    .case-media img { display: block; width: 100%; height: auto; object-fit: contain; }
    .case h3 { margin: 0 0 7px; font-size: 18px; }
    .case p { margin: 0; color: var(--muted); font-size: 13px; }
    .case .tag { display: inline-block; margin-top: 12px; color: #3659d8; font-size: 12px; font-weight: 700; }
    .score-panel { display: flex; align-items: center; justify-content: space-between; gap: 24px; margin-bottom: 22px; padding: 22px 26px; background: #e9fcf5; border-left: 4px solid var(--cyan); }
    .score-panel strong { font-size: 25px; }
    .score-panel span { color: #49675f; }
    .score { color: #0a8d78; text-align: right; font-size: 28px; font-weight: 800; white-space: nowrap; }
    .score small { display: block; color: #49675f; font-size: 12px; font-weight: 500; }
    .table-wrap { overflow-x: auto; border: 1px solid var(--line); background: #fff; }
    table { width: 100%; min-width: 700px; border-collapse: collapse; text-align: left; }
    th, td { padding: 14px 16px; border-bottom: 1px solid var(--line); vertical-align: top; }
    th { background: #eaf0fb; font-size: 13px; }
    td { color: #46566c; font-size: 13px; }
    td:first-child { color: var(--ink); font-weight: 700; }
    .match-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 42px; align-items: start; }
    .match-grid h2 { margin: 0 0 12px; font-size: 32px; line-height: 1.25; }
    .match-grid p { color: var(--muted); }
    .tags { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 20px; }
    .tags span { padding: 7px 11px; border: 1px solid #b9c9e3; color: #385076; font-size: 12px; background: #f8faff; }
    .token-row { display: grid; grid-template-columns: 1fr auto; gap: 18px; align-items: center; padding: 17px 0; border-bottom: 1px solid var(--line); }
    .token-row:last-child { border-bottom: 0; }
    .token-row strong { display: block; }
    .token-row span { color: var(--muted); font-size: 13px; }
    .token-row a { color: var(--blue); font-size: 13px; font-weight: 700; }
    .review-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; }
    .review { padding: 20px; border: 1px solid #2f4561; background: #192c45; }
    .review blockquote { margin: 0 0 16px; color: #e3ebf5; font-size: 14px; }
    .review cite { color: var(--lime); font-size: 12px; font-style: normal; }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-list details { border-bottom: 1px solid var(--line); }
    .faq-list summary { position: relative; padding: 18px 38px 18px 0; cursor: pointer; font-weight: 700; list-style: none; }
    .faq-list summary::-webkit-details-marker { display: none; }
    .faq-list summary::after { content: "+"; position: absolute; right: 6px; top: 14px; color: var(--blue); font-size: 23px; font-weight: 400; }
    .faq-list details[open] summary::after { content: "−"; }
    .faq-list details p { max-width: 850px; margin: 0; padding: 0 30px 18px 0; color: var(--muted); font-size: 14px; }
    .article-list { display: grid; grid-template-columns: repeat(5,1fr); gap: 12px; }
    .article-link { display: flex; min-height: 94px; align-items: center; justify-content: space-between; gap: 12px; padding: 16px; border: 1px solid var(--line); background: white; font-weight: 700; font-size: 14px; transition: border-color .2s, transform .2s; }
    .article-link:hover { transform: translateY(-2px); border-color: var(--blue); }
    .article-link span:last-child { color: var(--blue); font-size: 19px; }
    .contact-grid { display: grid; grid-template-columns: .8fr 1.2fr; gap: 44px; align-items: start; }
    .contact-grid h2 { margin: 0 0 12px; font-size: 32px; }
    .contact-grid p { color: var(--muted); }
    .contact-methods { margin-top: 22px; }
    .contact-methods p { margin: 8px 0; font-size: 14px; }
    .qr-wrap { width: 142px; margin-top: 20px; padding: 8px; background: white; border: 1px solid var(--line); }
    .qr-wrap img { display: block; width: 100%; height: auto; }
    .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
    .field { display: grid; gap: 6px; }
    .field.full { grid-column: 1 / -1; }
    .field label { color: #40516a; font-size: 13px; font-weight: 700; }
    .field input, .field select, .field textarea { width: 100%; min-height: 46px; padding: 11px 12px; border: 1px solid #cad5e4; border-radius: 3px; color: var(--ink); background: #fff; }
    .field textarea { min-height: 116px; resize: vertical; }
    .field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid rgba(49,94,251,.18); border-color: var(--blue); }
    .form-submit { margin-top: 15px; cursor: pointer; }
    .site-footer { padding: 30px 0; background: #e8eef7; color: #25344a; border-top: 1px solid #d5dfed; }
    .footer-top { display: flex; align-items: start; justify-content: space-between; gap: 24px; }
    .footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; justify-content: flex-end; }
    .footer-links a { color: #42546d; font-size: 12px; }
    .footer-bottom { display: flex; justify-content: space-between; gap: 16px; margin-top: 20px; padding-top: 14px; border-top: 1px solid #ccd7e5; color: #58677b; font-size: 12px; }
    .floating-contact { position: fixed; right: 18px; bottom: 20px; z-index: 15; display: flex; align-items: center; gap: 8px; padding: 11px 15px; border-radius: 4px; background: var(--navy); color: white; box-shadow: 0 8px 22px rgba(20,36,58,.2); font-size: 13px; font-weight: 700; }
    .floating-contact:hover { background: var(--blue); }
    .reveal { opacity: 0; transform: translateY(12px); 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; transition-duration: .01ms !important; animation-duration: .01ms !important; } .reveal { opacity: 1; transform: none; } }
    @media (max-width: 1000px) {
      .nav-wrap { min-height: 68px; }
      .menu-toggle { display: inline-grid; place-items: center; }
      .nav-cta { margin-left: auto; }
      .nav-links { display: none; position: absolute; top: 68px; left: 0; right: 0; padding: 12px 20px 18px; background: white; border-bottom: 1px solid var(--line); box-shadow: 0 12px 18px rgba(20,36,58,.08); }
      .nav-links.open { display: flex; justify-content: flex-start; gap: 3px 8px; }
      .nav-links a { padding: 8px 9px; font-size: 13px; }
      .service-grid { grid-template-columns: repeat(2,1fr); }
      .article-list { grid-template-columns: repeat(3,1fr); }
    }
    @media (max-width: 700px) {
      .container { width: min(var(--container), calc(100% - 32px)); }
      .hero { padding: 56px 0 32px; }
      .hero p { font-size: 15px; }
      .hero-strip { grid-template-columns: repeat(2,1fr); margin-top: 38px; }
      .metric { padding: 16px 10px 0 0; }
      .metric strong { font-size: 19px; }
      .section { padding: 52px 0; }
      .section-head { display: block; }
      .section-head p { margin-top: 10px; }
      .intro-grid, .match-grid, .contact-grid { grid-template-columns: 1fr; gap: 26px; }
      .intro-grid h2, .match-grid h2, .contact-grid h2 { font-size: 29px; }
      .feature-list { grid-template-columns: 1fr; }
      .service-grid { grid-template-columns: 1fr; }
      .service-item { min-height: auto; }
      .workflow { grid-template-columns: 1fr 1fr; }
      .workflow article { padding: 18px 14px 20px 0; }
      .workflow article + article { padding-left: 14px; }
      .workflow article:nth-child(3) { border-left: 0; padding-left: 0; border-top: 1px solid #30445e; }
      .workflow article:nth-child(4) { border-top: 1px solid #30445e; }
      .case-grid { grid-template-columns: 1fr; }
      .case { grid-template-columns: 1fr 1fr; }
      .score-panel { align-items: flex-start; flex-direction: column; gap: 8px; }
      .score { text-align: left; }
      .review-grid { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: 1fr 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .field.full { grid-column: auto; }
      .footer-top, .footer-bottom { flex-direction: column; }
      .footer-links { justify-content: flex-start; }
      .floating-contact { right: 12px; bottom: 12px; }
    }
    @media (max-width: 420px) {
      .brand-name { font-size: 15px; }
      .nav-cta { padding: 10px 11px; font-size: 12px; }
      .hero-actions .button { width: 100%; }
      .case { grid-template-columns: 1fr; }
      .article-list { grid-template-columns: 1fr; }
    }